Reciprocating plunger assembly of heat-conducting reciprocating pump built in front section of plunger assembly

文档序号：1335169 发布日期：2020-07-17 浏览：4次中文

阅读说明：本技术 柱塞组件前段内置导热往复泵的往复柱塞组件 (Reciprocating plunger assembly of heat-conducting reciprocating pump built in front section of plunger assembly ) 是由何巨堂何艺帆于 2020-03-27 设计创作，主要内容包括：柱塞组件前段内置导热往复泵的往复柱塞组件,柱塞组件前段的柱塞与柱塞函之间有内置液腔FQ,往复运动通过FQ的柱塞段含有驱动导热液往复流动的辅泵腔塞QS,FQ腔壁也是导热液DL与柱塞函、柱塞之间的动态换热面,形成导热往复泵即辅泵；柱塞进程靠近主液缸时,辅泵前腔V6的DL自V6接口N6排出流向传热部件HX换热,HX内DL经辅泵内腔接口N1正向流返回辅泵内腔V1进行导热；柱塞返程远离主液缸时,V1的DL自N1排出流向HX,同时HX内DL经N6逆向流返回V6；可提高柱塞密封件与主液缸之间的操作温差而优化柱塞密封件温度,提高主液缸的操作温度范围和体积效率,降低冲洗油耗量,扩大柱塞往复泵应用范围。(A reciprocating plunger assembly of a heat-conducting reciprocating pump is arranged in the front section of a plunger assembly, a built-in liquid cavity FQ is arranged between a plunger and a plunger box of the front section of the plunger assembly, reciprocating motion of the plunger through the FQ comprises an auxiliary pump cavity plug QS for driving heat-conducting liquid to flow in a reciprocating mode, the wall of the FQ cavity is also a dynamic heat exchange surface between the heat-conducting liquid D L and the plunger box and the plunger to form the heat-conducting reciprocating pump, namely an auxiliary pump, when a plunger process is close to a main liquid cylinder, D L of an auxiliary pump front cavity V6 is discharged from a V6 interface N6 to flow to a heat-conducting component HX for heat exchange, D L in the HX positively flows back to an auxiliary pump inner cavity V1 through an auxiliary pump inner cavity interface N1 for heat conduction, when the plunger process is far away from the main liquid cylinder, D L of V1 is discharged from N1 to HX, D L in the HX reversely flows back to V6 through N6, the operating temperature difference between the plunger seal and the main liquid cylinder can be improved, the plunger seal temperature is optimized, the operating temperature.)

1. The reciprocal plunger subassembly of the built-in heat conduction reciprocating pump of plunger subassembly anterior segment, its characterized in that:

a reciprocating plunger assembly U100, at least comprising a plunger U110, a plunger housing U130, and a plunger seal U120 installed in the plunger housing;

the plunger U110 is placed in the inner cavity of the plunger U130 and used for reciprocating motion;

the end face of the plunger letter U130, which is in contact with the main hydraulic cylinder, is the front end face of the plunger letter U130, and the end face of the plunger letter U130, which is far away from the main hydraulic cylinder, is the rear end face of the plunger letter U130;

the reciprocating plunger assembly U100 at least uses 2 plunger seals, the plunger seal closest to the rear end face of the plunger box U130 is an outer plunger seal U129, the other plunger seals belong to plunger main seals, and the plunger main seal closest to the outer plunger seal U129 is also called as the outer plunger main seal;

when 2 or more plunger main seals are used in the reciprocating plunger assembly U100, the numbers are sequentially numbered from near to far according to the distance from the front end face of the plunger letter U130, the plunger main seal closest to the front end face of the plunger letter U130 is a1 st plunger main seal U121, and the other plunger main seals are a 2 nd plunger main seal U122, a 3 rd plunger main seal U123 and the like;

the part of the plunger letter U130 between the front end face of the plunger letter U130 and the 1 st plunger main seal U121 is called as the front section of the plunger letter U130;

the part of the plunger letter U130 between the rear end face of the plunger letter U130 and the main seal of the plunger at the outer side is called the rear section of the plunger letter U130;

when the reciprocating plunger assembly U100 uses 2 or more plunger main seals, the plunger letter U130 part between the 1 st plunger main seal U121 and the plunger main seal at the outer side is called the middle section of the plunger letter U130;

a plunger pocket U130 containing at least the plunger packing pocket fitted with or contacting the plunger seal U120 and possibly a plunger barrel not fitted with the plunger seal U120, the plunger barrel adjacent to the main cylinder being referred to as a plunger front barrel;

the reciprocating plunger assembly U100 is characterized by also comprising a built-in auxiliary heat exchange reciprocating PUMP 7PUMP (auxiliary PUMP);

the auxiliary pump is composed and works according to the following principle:

① plunger function U130 front section and reciprocating between the plunger U110 front section, constituting built-in auxiliary pump fluid chamber FQ, plunger U110 front section reciprocating through FQ position set up auxiliary pump fluid chamber plug QS which pushes auxiliary pump fluid chamber FQ fluid movement;

when the plunger U110 reciprocates, the auxiliary pump cavity plug QS is driven to reciprocate to push heat-conducting liquid in the auxiliary pump liquid cavity FQ to reciprocate, and the auxiliary pump cavity plug QS plays a role of a reciprocating pump plunger;

an auxiliary pump liquid cavity FQ is divided into an auxiliary pump inner cavity and an auxiliary pump front cavity by taking an auxiliary pump cavity plug QS as a boundary;

the part of an auxiliary pump liquid cavity FQ far away from the front end surface of the plunger piston U130 by taking an auxiliary pump cavity plug QS as a boundary is an auxiliary pump inner cavity,

the part of an auxiliary pump liquid cavity FQ close to the front end surface of the plunger U130 is an auxiliary pump front cavity by taking an auxiliary pump cavity plug QS as a boundary,

in the reciprocating process of the plunger U110, the liquid suction and discharge space of the inner cavity of the auxiliary pump is called as an inner dynamic cavity of the auxiliary pump, and the volume of the inner dynamic cavity of the auxiliary pump is a dynamic variable quantity;

in the reciprocating process of the plunger U110, the liquid suction and discharge space of the front cavity of the auxiliary pump is called as a front moving cavity of the auxiliary pump, and the volume of the front moving cavity of the auxiliary pump is a dynamic variable quantity;

the auxiliary pump inner cavity is communicated with the auxiliary pump front cavity through a channel and a heat transfer element HX, and the auxiliary pump inner cavity is communicated with the auxiliary pump front cavity through a communicating vessel;

②, the heat transfer element HX is used for receiving the heat-conducting liquid discharged from the auxiliary pump liquid cavity FQ, transferring heat to the heat-conducting liquid to change the temperature of the heat-conducting liquid, returning the heat-conducting liquid after the temperature change of the heat transfer to the auxiliary pump liquid cavity FQ, and heating the wall surface of the auxiliary pump liquid cavity FQ;

③ the heat-conducting liquid in the auxiliary pump fluid cavity FQ reciprocates along with the reciprocating motion of the auxiliary pump cavity plug QS, contacts with the wall of the auxiliary pump fluid cavity FQ to perform reciprocating flow contact heat conduction on the inner surface of the front section of the plunger U130 and the outer surface of the front section of the plunger, the wall of the auxiliary pump fluid cavity FQ is also a heat-conducting surface, and the auxiliary pump fluid cavity FQ is also called as an auxiliary pump heat-conducting cavity;

when the main plunger U110 moves forwards, the main plunger U110 moves forwards close to the main hydraulic cylinder, heat-conducting liquid is discharged from the front movable cavity of the auxiliary pump through the interface N6X and enters the heat transfer element HX, and the heat-conducting liquid with changed temperature discharged from the heat transfer element HX is used as forward cold flow to return to the inner movable cavity of the auxiliary pump through the interface N1X;

when the main plunger U110 makes a return movement, the main plunger U110 makes a return movement away from the main hydraulic cylinder, the heat-conducting liquid is discharged from the internal movable cavity of the auxiliary pump through the interface N1X and enters the heat transfer element HX, and the heat-conducting liquid with the temperature changed and discharged from the heat transfer element HX is returned to the front movable cavity of the auxiliary pump as a reverse cold flow through the interface N6X.

2. The reciprocating plunger assembly of claim 1, wherein:

and (b) a form of auxiliary pump cavity plug QS selected from 1 or a combination of several of the following:

① the outer side surface is a smooth cylinder;

②, a cylinder with 1 or 2 or more inner grooves is arranged outside;

③ cylindrical body with internal screw thread on its outer side;

④ is provided with a cylinder communicating the minute passages of the sub pump rear chamber and the sub pump front chamber.

3. The reciprocating plunger assembly of claim 1, wherein:

the inner cavity form of the front section of the plunger letter U110 is selected from 1 or a combination of several of the following components:

① equal diameter channels with the same inner diameter;

② the inner diameter of the side close to the main cylinder is smaller than that of the side far from the main cylinder;

③ is larger than the main cylinder on the side away from the main cylinder.

4. The reciprocating plunger assembly of claim 1, wherein:

the heat transfer element HX is in a form selected from 1 or a combination of several of the following forms:

① independent of the heat transfer element of the plunger barrel;

② converge on the heat transfer element of the plunger barrel.

5. The reciprocating plunger assembly of claim 1, wherein:

the heat transfer element HX is in a form selected from 1 or a combination of several of the following forms:

① the heat pipe is a smooth pipe, the guide vane liquid flows in the heat exchange pipe;

② the heat exchange tube is a screw tube, the guide vane liquid flows in the heat exchange tube, the inner side and/or outer side of the heat exchange tube is provided with screw thread;

③ the heat exchange tube is the finned tube, and guide vane liquid flows in the heat exchange tube, and the finned tube is arranged to the heat exchange tube inboard and/or the outside.

6. The reciprocating plunger assembly of claim 1, wherein:

the heat transfer element HX is a heat transfer element independent from the plunger sleeve, and the relation between the central elevation of the heat transfer element HX and the central elevation of the plunger sleeve U130 is selected from 1 of the following types:

① are equal in height;

②, the central elevation of the heat transfer element HX is lower than the central elevation of the plunger letter U130;

③ the height of the center of the heat transfer element HX is higher than the height of the center of the plunger letter U130.

7. The reciprocating plunger assembly of claim 1, wherein:

the heat transfer element HX uses a heat transfer medium which is in heat transfer with the heat transfer liquid and is selected from 1 of the following types:

① gas, possibly air;

② liquid, which may be water or oil;

③ gas-liquid mixture.

8. The reciprocating plunger assembly of claim 1, wherein:

the volume infusion amount of the built-in auxiliary heat exchange reciprocating PUMP 7PUMP-RW is in a ratio K700 to the volume infusion amount of the main hydraulic cylinder U100-RW driven by the reciprocating plunger assembly U100, wherein K700 is (7PUMP-RW)/(U100-RW), and K700 is selected from 1 of the following types:

① is less than 0.1;

②0.1～0.3；

③0.3～1.0；

④ is greater than 1.0.

9. The reciprocating plunger assembly of claim 1, wherein:

the cavity wall area of the front moving cavity of the auxiliary pump is K300 times of the cavity wall area of the inner moving cavity of the auxiliary pump, and K300 is selected from 1 of the following types:

①0.5～1.0；

②1.0～3.0；

③ is greater than 3.0.

10. The reciprocating plunger assembly of claim 1, wherein:

reciprocating plunger subassembly U100 sets up 2 plunger seals, and its effect is:

① outside plunger seal, preventing the liquid in the space between 2 plunger seals from leaking to the outside environment;

② plunger primary seal, preventing leakage of primary cylinder media into the space between the 2 plunger seals.

11. The reciprocating plunger assembly of claim 1, wherein:

reciprocating plunger subassembly U100 sets up 3 plunger seals, and its effect is:

① outside plunger seal, preventing the liquid in the space between the outside plunger seal and the outside plunger main seal from leaking to the outside environment;

② the 2 nd or outer plunger primary seal prevents liquid in the space between the 2 nd and 1 st plunger primary seals from leaking into the space between the outer and 2 nd plunger primary seals;

③ plunger primary seal 1, prevents leakage of primary cylinder media into the space between plunger primary seal 1 and plunger primary seal 2.

12. The reciprocating plunger assembly of claim 1, wherein:

reciprocating plunger subassembly U100 sets up 4 plunger seals, and its effect is:

① outside plunger seal, preventing the liquid in the space between the outside plunger seal and the outside plunger main seal from leaking to the outside environment;

② the 3 rd plunger main seal, i.e. the outer plunger main seal, prevents the liquid in the space between the 3 rd plunger main seal and the 2 nd plunger main seal from leaking into the space between the outer plunger main seal and the 3 rd plunger main seal;

③ plunger primary seal 2, preventing liquid in the space between the plunger primary seal 2 and the plunger primary seal 1 from leaking into the space between the plunger primary seal 2 and the plunger primary seal 3;

④ plunger primary seal 1, prevents leakage of primary cylinder media into the space between plunger primary seal 1 and plunger primary seal 2.

13. The reciprocating plunger assembly of claim 1, wherein:

the reciprocating plunger assembly U100 is provided with at least 2 plunger seals;

and the sealing liquid is continuously or discontinuously replaced in the gap between the outer plunger seal and the outer plunger main seal, so that the liquid material passing through the outer plunger main seal is prevented from polluting the outer plunger seal.

14. The reciprocating plunger assembly of claim 1, wherein:

the reciprocating plunger assembly U100 is provided with at least 2 plunger seals;

at plunger letter U130 anterior segment, use and keep apart the flush fluid, continuous or be interrupted the injection plunger letter U130 anterior segment, the isolation flush fluid of injection finally enters into main hydraulic cylinder, prevents that the liquid material that comes from main hydraulic cylinder from polluting plunger letter U130 anterior segment and then polluting the 1 st plunger main seal.

15. The reciprocating plunger assembly of claim 1, wherein:

the reciprocating plunger assembly U100 is provided with at least 3 plunger seals, namely at least 2 plunger main seals;

in the gap JX-23 between any 2 plunger main seals, continuous or intermittent replacement of flushing liquid is used to prevent liquid material from the space near the main cylinder side from penetrating the plunger main seal into the gap JX-23 to cause pollution.

16. The reciprocating plunger assembly of claim 1, wherein:

the reciprocating plunger assembly U100 is provided with at least 2 plunger seals;

an isolation flushing liquid is continuously or discontinuously injected into the front section of the plunger letter U130 at the front section of the plunger letter U130, and the injected isolation flushing liquid finally enters the main hydraulic cylinder to prevent liquid materials from the main hydraulic cylinder from polluting the front section of the plunger letter U130 and further polluting the 1 st plunger main seal;

the working mode of the isolation flushing liquid is selected from 1 of the following modes:

①, the plunger U110 moves to the whole distance to separate and flush based on the reciprocating motion of the plunger U110;

② the return process of the plunger U110 is isolated and washed by taking the reciprocating motion of the plunger U110 as the reference;

the isolation flushing liquid adopts a working mode of plunger return synchronous injection, when the plunger U110 is in a return stroke, the main hydraulic cylinder sucks liquid materials, and the plunger of the injection pump for isolating the flushing liquid acts to flush the isolation liquid cavity at the front section of the plunger of the reciprocating plunger assembly U100; when the plunger U110 is in a forward stroke, the main cylinder discharges liquid materials, the plunger of the injection pump for isolating flushing liquid acts to suck the isolating liquid, and the front section of the plunger U130 of the reciprocating plunger assembly U100 is not flushed.

17. The reciprocating plunger assembly of claim 1, wherein:

a plunger shaft U130 in a form selected from 1 of:

① are one-piece components;

② is the assembly of the anterior segment of plunger case and the posterior segment of plunger case of 2 separate parts, the anterior segment of plunger case is a part, the posterior segment U131 of plunger case is another part;

③ is an assembly of multiple separate parts;

when the plunger assembly U130 comprises 2 or more plunger assembly sections, the complete plunger assembly U130 is formed after assembly.

18. The reciprocating plunger assembly of claim 1, wherein:

the plunger letter U130 is an assembly of front sections and rear sections of 2 split parts, wherein the front section is one part, and the rear section is the other part;

a reciprocating plunger assembly U100 provided with at least 2 plunger U110 seals;

at least 1 plunger U110 seal is arranged at the rear section of the plunger box, and at most all the plunger U110 seals are arranged.

19. The reciprocating plunger assembly of claim 1, wherein:

the plunger letter U130 is an assembly of front sections and rear sections of 2 split parts, wherein the front section is one part, and the rear section is the other part;

a reciprocating plunger assembly U100 provided with at least 2 plunger U110 seals;

at least 1 plunger U110 seal is arranged at the front section of the plunger box.

20. The reciprocating plunger assembly of claim 1, wherein:

the reciprocating plunger assembly U100 is provided with an auxiliary pump follow-up cavity, an auxiliary pump main cavity plug ZQS and an auxiliary pump auxiliary cavity plug FQS;

the auxiliary pump follow-up cavity is communicated with the inner cavity of the auxiliary pump through a passage AN1 and a heat transfer element HX which can be used, and the auxiliary pump follow-up cavity is communicated with the front cavity of the auxiliary pump through a passage AN2 and a heat transfer element AHX which can be used;

the auxiliary pump is provided with at least one heat transfer component which is a heat transfer component HX and/or a heat transfer component AHX;

the auxiliary pump follow-up cavity, the auxiliary pump inner cavity and the auxiliary pump front cavity are in a communicating vessel relationship.

21. The reciprocating plunger assembly of claim 1, wherein:

the relationship between reciprocating plunger assembly U100, auxiliary pump chamber plug QS and plunger box, 1 of the following is selected:

① the auxiliary pump cavity plug QS is not in contact with the plunger cage, and a gap exists;

② contact between the auxiliary pump cavity plug QS and the plunger box, the contact part is the auxiliary pump cavity separating filler which is installed on the plunger U110;

③ the auxiliary pump chamber plug QS is in contact with the plunger housing at the contact portion where the auxiliary pump chamber partition packing is mounted on the plunger housing U130.

22. The reciprocating plunger assembly of claim 1, wherein:

the absolute value of the difference between the operating temperature T2 of the reciprocating ram assembly U100, the ram primary seal closest to the primary cylinder, i.e., the 1 st ram primary seal, and the primary cylinder operating temperature T1 is selected from 1 of the following:

①30～60℃；

②60～90℃；

③90～150℃；

④150～200℃；

⑤ is greater than 200 ℃.

23. The reciprocating plunger assembly of claim 1, wherein:

the reciprocating plunger assembly U100 is provided with a heat exchange jacket on the cylinder body of the plunger assembly U130, and the medium flowing in the heat exchange jacket and the working mode are selected from 1 or the combination of several of the following types:

① the heat-extracting medium with cooling effect is gas phase and/or liquid phase;

② the heating medium for heating is gas phase and/or liquid phase;

③ the heat-extracting medium with cooling and temperature control functions is in gas phase and/or liquid phase;

④ are used for heating medium with temperature control function, and are in gas phase and/or liquid phase.

24. A plunger-type reciprocating pump using the reciprocating plunger assembly of claim 1, characterized in that:

the main hydraulic cylinder K10 used with the reciprocating plunger assembly U100 is a pump cylinder K10 of a plunger type reciprocating pump APUMP.

25. The plunger-type reciprocating pump of claim 24, wherein:

plunger reciprocating pump APUMP systems use 1 or 2 or more single pump chamber type pump cylinders.

26. The plunger-type reciprocating pump of claim 24, wherein:

plunger type reciprocating pump APUMP system, the integral pump cylinder body used has 1 or 2 or more pump chambers.

27. The plunger-type reciprocating pump of claim 24, wherein:

the pumping target liquid of the plunger type reciprocating pump APUMP is selected from 1 or more of the following materials:

① high temperature liquid material;

② low temperature liquid material;

③ high-pressure liquid material;

④ high temperature and high pressure liquid material;

⑤ high temperature and high pressure solid-liquid containing material;

⑥ liquid material containing easily coagulating component;

⑦ liquid material containing volatile component;

⑧ contains a solid slurry;

⑨ liquid material containing corrosive components;

⑩ liquid material containing explosive component;

liquid material containing toxic components;

a liquid material containing radioactive components.

28. The plunger-type reciprocating pump of claim 24, wherein:

the working mode of the filling liquid added into a stuffing box or a plunger sleeve of the plunger type reciprocating pump APUMP is selected from 1 or more of the following modes:

① can be used for long term after being injected once;

② intermittent injection and discharge are performed, and the injected liquid finally enters the pump cavity of the pump body and is discharged out of the pump cavity along with the pumped target liquid;

③ the injection is continuously discharged, and the discharged injection liquid finally enters the pump cavity of the pump body and is discharged out of the pump cavity along with the pumping target liquid.

29. The plunger-type reciprocating pump of claim 24, wherein:

the operating conditions of the plunger type reciprocating pump APUMP are as follows: the temperature is 150-400 ℃, the inlet pressure is 0.3-1.0 MPa, the outlet pressure is 2.0-30.0 MPa, the weight concentration of solid particles is 0-55%, and the volume flow rate of liquid material at the inlet of the pump cavity is 0.1-150 m³/h。

30. The plunger-type reciprocating pump of claim 24, wherein:

the plunger type reciprocating pump APUMP is an oil coal slurry booster pump in the coal hydrogenation direct liquefaction reaction process or the kerosene co-refining hydrogenation reaction process, and the operation conditions are as follows: the temperature is 150-350 ℃, the inlet pressure is 0.3-1.0 MPa, the outlet pressure is 2.0-30.0 MPa, the weight concentration of solid particles is 25-60%, and the volume flow rate of liquid material at the inlet of the pump cavity is 0.1-200 m³/h。

31. The plunger-type reciprocating pump of claim 24, wherein:

the plunger type reciprocating pump APUMP is an oil coal slurry booster pump in the coal hydrogenation direct liquefaction reaction process or the kerosene co-refining hydrogenation reaction process, and the operation conditions are as follows: the temperature is 150-350 ℃, the inlet pressure is 0.3-1.0 MPa, the outlet pressure is 5.0-30.0 MPa, the weight concentration of solid particles is 40-55%, and the volume flow rate of liquid material at the inlet of the pump cavity is 10-150 m³/h。

32. The plunger-type reciprocating pump of claim 24, wherein:

the plunger type reciprocating pump APUMP is an oil coal slurry booster pump in the coal hydrogenation direct liquefaction reaction process or the kerosene co-refining hydrogenation reaction process, and the quantity of working fluids of a plunger, a packing box and a plunger outer sleeve is as follows: the hourly volume flow of the injected liquid is 0.5-5% of the volume flow of the pumping target liquid of the plunger type reciprocating pump APUMP.

33. The plunger-type reciprocating pump of claim 24, wherein:

the plunger type reciprocating pump APUMP is arranged in the following way: the axis of the plunger (111) is arranged horizontally, the pump cylinder K10 is arranged vertically, the used divider XKP is arranged vertically, and the used liquid guide tube (33) is arranged vertically.

34. The plunger-type reciprocating pump of claim 24, wherein:

at the driving end of the plunger type reciprocating pump APUMP system, a prime motor is selected from 1 of the following types:

① a motor;

② variable frequency motor;

③ diesel engines;

④ a hydraulic motor;

⑤ steamer.

35. The plunger-type reciprocating pump of claim 24, wherein:

the driving end of the plunger type reciprocating pump APUMP system drives the hydraulic end to work after a transmission is used for converting high-rotation-speed motion of a prime motor into low-rotation-speed motion.

36. The plunger-type reciprocating pump of claim 24, wherein:

the plunger type reciprocating pump APUMP system comprises 1 or 2 or more pump cylinders, 1 or 2 or more plunger assemblies are matched for use, and 2 or more plunger assemblies use a heat transfer device HX for each plunger assembly and use the same heat transfer medium.

37. The plunger-type reciprocating pump of claim 36, wherein:

the plunger type reciprocating pump APUMP and the system thereof form an integrated skid-mounted structure by part or all of components.

Technical Field

The invention relates to a reciprocating plunger assembly of a heat-conducting reciprocating pump arranged in the front section of a plunger assembly, wherein a built-in liquid cavity FQ is arranged between a plunger and a plunger box of the front section of the plunger assembly, the reciprocating motion of the plunger through the FQ comprises an auxiliary pump cavity plug QS for driving heat-conducting liquid to flow in a reciprocating manner, the wall of the FQ cavity is also a dynamic heat exchange surface between the heat-conducting liquid D L and the plunger box and the plunger to form a heat-conducting reciprocating pump, namely an auxiliary pump, when a plunger process is close to a main liquid cylinder, D L of an auxiliary pump front cavity V6 is discharged from a V6 interface N6 to flow to a heat-conducting component HX for heat exchange, HX inner D L positively flows back to an auxiliary pump inner cavity V1 for heat conduction through an auxiliary pump inner cavity interface N1, and when the plunger return stroke is far away from the main liquid cylinder, D L of V1 is discharged from N1 to flow to HX, and simultaneously D L in the HX returns to V6 through N6, so that the operating temperature difference between the plunger seal and the main liquid cylinder is improved, the temperature of the.

Background

The reciprocating plunger assembly U100 of the present invention refers to an assembly comprising a plunger, a plunger housing, a plunger seal mounted within the plunger housing, and other components that may be used. The plunger case can also be called a stuffing case and a stuffing sealing case, and the part of the multi-section plunger case which is not contacted with the plunger sealing stuffing can also be called a plunger sleeve. The plunger sealing element fixed in the plunger case contacts the surface of the plunger to provide support for the plunger during axial movement of the plunger, a sealing isolation is formed between a high-pressure chamber and a low-pressure chamber in the plunger case to prevent liquid leakage, meanwhile, sliding friction between the sealing material and the contact surface of the plunger belongs to sliding friction with lubricating oil, and the lubricating oil lubricates and cools the sliding friction contact surface.

According to the reciprocating plunger assembly U100 disclosed by the invention, in a normal working state, the plunger U110 reciprocates in the plunger box U130 provided with the plunger sealing piece U120, namely the plunger U110 reciprocates relative to a contact surface of the plunger sealing piece U120, and the plunger sealing piece U120 has the function of supporting the plunger U110 and is used for preventing or reducing the main medium in the main cylinder from leaking to the middle section and the rear section of the plunger box through the No. 1 plunger main seal so as to reduce the pollution degree of the liquid (or lubricating oil or flushing liquid) in the plunger box by the main medium.

The reciprocating plunger assembly U100 of the present invention utilizes a plunger seal, typically in the form of a packing seal.

When the reciprocating plunger assembly U100 is used for liquid conveying equipment such as a liquid plunger reciprocating pump, a hydraulic cylinder which is matched with the assembly U100 and used for conveying target process fluid is called as a main hydraulic cylinder, so that the reciprocating plunger assembly U100 is distinguished from an auxiliary pump liquid cavity FQ which is internally provided with a heat-conducting reciprocating pump and uses heat-conducting liquid and is provided with the plunger assembly U100; meanwhile, the process fluid conveyed by the main liquid cylinder is taken as a main medium, and is distinguished from other materials such as heat-conducting liquid, flushing liquid, sealing liquid and the like used by the plunger assembly U100.

According to the reciprocating plunger assembly U100, the end face of the plunger letter U130, which is in contact with a main cylinder, is the front end face of the plunger letter U130, and the end face of the plunger letter U130, which is far away from the main cylinder, is the rear end face of the plunger letter U130;

the reciprocating plunger assembly U100 of the present invention may use 1 or 2 or more plunger seals, but typically uses at least 2 plunger seals to ensure the safety of the outside plunger seal (no leakage of primary media to the environment).

The reciprocating plunger assembly U100 of the invention generally uses at least 2 plunger seals, the plunger seal 1 furthest away from the main hydraulic cylinder is called an outer plunger seal, and the rest plunger seals are called plunger main seals; the plunger main seals are numbered sequentially from near to far according to the distance from the main hydraulic cylinder, the 1 plunger main seal closest to the main hydraulic cylinder is called a1 st plunger main seal, and other plunger main seals sequentially become a 2 nd plunger main seal, a 3 rd plunger main seal and the like; the plunger primary seal closest to the outboard plunger seal is also referred to as the outboard plunger primary seal.

According to the reciprocating plunger assembly U100, when 2 plunger seals are used, the 1 st plunger main seal is also the outer plunger main seal at the same time; according to the reciprocating plunger assembly U100, when 3 plunger seals are used, the 2 nd plunger main seal is also the outer plunger main seal; when 4 plunger seals are used, the 3 rd plunger main seal is also the outer plunger main seal at the same time in the reciprocating plunger assembly U100 of the invention.

The reciprocating plunger assembly U100 of the present invention generally uses packing seals, at least 2 plunger packing seals, the 1 plunger packing seal closest to the main cylinder is called the 1 st plunger main packing seal, and the 1 plunger packing seal farthest from the main cylinder is called the outside plunger packing seal.

The reciprocating plunger assembly U100 of the invention generally uses packing for sealing, and when at least 3 plunger packings are used, the plunger packing packings between the 1 st plunger main packing and the outer plunger packing are sequentially sorted from the 1 st plunger main packing to the outer plunger packing as the 2 nd plunger main packing and the like.

The front section of the reciprocating plunger assembly U100 of the invention specifically refers to a plunger box part and a plunger part between a1 st plunger main seal and a main cylinder.

The rear section of the reciprocating plunger assembly U100 specifically refers to a plunger box part and a plunger part which are bound by an outer plunger main seal and reach the rear end face of the plunger box U130, namely the plunger box part and the plunger part which are bound by the outer plunger main seal and are far away from a main hydraulic cylinder.

When the reciprocating plunger assembly U100 of the present invention uses at least 3 plunger seals, the plunger portion of the 1 st plunger primary seal that is the plunger housing portion, the plunger portion, that is the outboard plunger primary seal is referred to as the mid-section of the reciprocating plunger assembly U100.

The operational life of the plunger seal U120 of the reciprocating plunger assembly U100 is affected by the operating temperature, operating pressure, and the nature of the lubrication medium, where operating temperature is an important parameter.

The invention is suitable for a high-temperature plunger reciprocating pump or a low-temperature plunger reciprocating pump, and mainly aims to improve the temperature difference between the operating temperature of a plunger seal and the operating temperature of a main hydraulic cylinder, so as to optimize the operating temperature of the plunger seal (generally aiming at being as close to the ambient temperature as possible), so as to reduce the abrasion speed of the plunger seal, improve the lubricating performance, prolong the service life of the seal and improve the sealing performance, and further allow the operating temperature range of the main hydraulic cylinder to be widened.

The invention is mainly described by combining a high-pressure plunger reciprocating pump for conveying a main medium with high temperature and high solid particle concentration, one example is the high-pressure reciprocating pump for conveying high-temperature coal slurry for a coal hydrogenation direct liquefaction device, the temperature of the main medium is as high as 290-350 ℃, the content of solid coal powder is as high as 48.5-55 wt%, and the outlet pressure can be as high as 15-30 MPa.

For the sliding friction process of the contact surface between the plunger packing U120 and the plunger U110 in the presence of lubricating fluid, generally, the lubricating performance of the lubricating oil and the anti-abrasion performance of the sealing element are reduced when the operating temperature is too high or too low, and the deformation quantity generated on the plunger, the plunger box, the metal part of the plunger sealing element and the sealing material is larger when the operating temperature deviates from the ambient temperature, so the plunger sealing element abrasion speed is higher when the temperature is higher; the larger the deviation of the operating temperature of the friction part of the plunger sealing element and the plunger from the ambient temperature, the shorter the service life of the plunger sealing element, on the contrary, if the operating temperature of the friction part of the plunger sealing element and the plunger can be effectively controlled to be close to the ambient temperature as much as possible, the service life of the plunger sealing element can be effectively prolonged, the leakage rate of the plunger sealing element can be reduced, the pollution of a main medium to the rear section of the plunger assembly U100 is reduced, and the operating safety of the plunger assembly U100 is improved.

For a long time, the delivery of high-temperature liquid materials by a plunger reciprocating pump is a difficult problem in the plunger reciprocating pump industry, which limits the selection or optimization of a plurality of process flows, and the most important reason is that a method for reducing the temperature of a sealing contact surface, which has the advantages of simple system, simple structure, good heat exchange effect, low energy consumption, small occupied space volume and small influence on the volume efficiency of a main liquid cylinder, cannot be found, but the invention aims to provide a structural scheme or a design method capable of basically meeting the comprehensive requirements, namely a novel mechanical structure of the front section of a plunger assembly U100 to effectively and controllably realize the heat conduction and the temperature reduction of the front section of the plunger assembly U100 and provide a corresponding working system.

In the prior art, the common material of the front section of the plunger assembly U100 is a metal or alloy material with good thermal conductivity, therefore, the heat transferred by the main cylinder fluid or the main cylinder wall can be quickly transferred to the rear section of the plunger function and the rear section of the plunger, so that the operating temperature of the 1 st plunger primary seal is less different from the bulk temperature of the primary cylinder process fluid, while the higher the operating temperature of the 1 st plunger primary seal, the greater the leakage probability and wear rate of the 1 st plunger primary seal, in order to effectively lower the operating temperature of the 1 st plunger main seal, the temperature difference DT between the operating temperature of the 1 st plunger main seal and the operating temperature of the main cylinder main medium must be effectively increased, that is, a heat conducting mechanism with a simple structure must be arranged at the front section of the plunger assembly U100, the plunger assembly U100 is effectively thermally conductive (heat extraction) to the plunger housing front end, and then transfers this heat release out of the plunger assembly U100.

In the existing technical scheme, the following 2 ways of generating the temperature difference DT are available:

① indirect heat conduction mode, wherein a heat transfer pore canal is arranged on the entity of the front section of the plunger box, the method belongs to the cooling of the outer side part of the plunger box with small heat transfer load, and is indirect cooling for the plunger sealing piece, and the cooling amplitude is limited;

② direct heat conduction mode, wherein a direct heat conduction mode is used for directly flushing the gap between the plunger and the plunger box at the front section of the plunger assembly by using a cooling flushing liquid and finally entering the main hydraulic cylinder so as to cool the outer surface of the plunger at the front section of the plunger assembly U100 and the inner surface of the plunger box, but the operation mode has limited flow of the flushing liquid, limited cooling amplitude and unsatisfactory cooling effect;

the reason why the flow rate of the flushing liquid cannot be large is that: the larger the flow of the flushing liquid is, the lower the volumetric efficiency of the reciprocating pump is, the larger the increase of the volume of the hydraulic cylinder is caused, the power of the reciprocating pump can be increased greatly, and the power of the flushing liquid conveying pump is also large; meanwhile, the larger the flow of the flushing liquid is, the greater the efficiency of the process device is reduced, which is uneconomical and infeasible for a small-flow reciprocating pump; in an actual industrial device, the ideal mode is to use the flushing liquid with the least amount as possible to complete the intermittent return flushing.

In order to form a simple cooling system for the front section of the plunger assembly U100 without using a large amount of heat transfer fluid, or even with little heat transfer fluid supplied externally, it is necessary to design a heat transfer system having the following dynamic characteristics and flow path characteristics:

① is characterized in that an external power system of the heat conduction system, namely a heat conduction liquid injection system (including a heat conduction liquid injection pump) must be cancelled, obviously, the drive of the heat conduction liquid heat conduction flow process can be completed only by the plunger with the reciprocating motion function of the plunger assembly U100, namely, the liquid cavity and the cavity plug of the auxiliary reciprocating pump are required to be arranged at the front section of the plunger assembly U100;

② flow path is characterized in that in order to reduce the flow rate of externally supplied heat conduction liquid and satisfy the heat conduction requirement of the front section of the plunger assembly U100, the heat conduction liquid must be fully or partially recycled, that is, the inner cavity of the auxiliary reciprocating pump cavity is communicated with the front cavity, based on the principle of the heat conduction liquid circulating and reciprocating flow, the circulation liquid can be flexibly increased without externally supplied heat conduction liquid, so that the heat conduction liquid reciprocates and releases heat through the heat transmitter, generally, the reciprocating frequency and stroke of the plunger are limited by the working parameters of the main cylinder and are inconvenient to adjust, and the radial flow area of the auxiliary pump liquid cavity can be flexibly set, so that the larger the radial flow area of the auxiliary pump liquid cavity is, the larger the heat conduction liquid flow rate of the auxiliary pump is, and the larger the heat conduction capacity is, thus the design flexibility of the heat conduction liquid flow rate is increased;

③ because the pressure difference between the front and back cavities of the auxiliary pump is small, even if the flow of the heat transfer liquid is large, the power consumed by the auxiliary pump is low;

④ Heat transfer component matching with the heat transfer component HX of the heat transfer system to meet the control requirement of the temperature difference DT, the flexibility of design and operation control is large, 1 or 2 parameters of the inlet temperature and flow of the heat transfer medium of the heat transfer component HX can be selected as control parameters, thereby flexibly controlling the temperature of the heat transfer liquid discharged by the HX, namely controlling the temperature of the heat transfer liquid entering the auxiliary pump cylinder.

So far, the concept of providing a built-in heat-conducting reciprocating pump at the front section of the plunger assembly U100 has been proposed, and for the sake of simplifying the description, the present invention also refers to the built-in heat-conducting reciprocating pump as an auxiliary pump.

In the built-in heat-conducting reciprocating pump of the plunger assembly U100, an auxiliary pump liquid cavity FQ (auxiliary pump hydraulic cylinder) is formed by the structures and relative positions of the front section part of a plunger and the front section part of a plunger.

The plunger front section part of the plunger assembly U100 of the invention comprises an auxiliary pump cavity plug QS for driving heat-conducting liquid to flow in a reciprocating manner; the auxiliary pump chamber plug QS contains at least an auxiliary pump main chamber plug ZQS; when the auxiliary pump is provided with a follower chamber, the auxiliary pump chamber plug QS also contains an auxiliary pump auxiliary chamber plug FQS.

According to the plunger assembly U100, reciprocating motion is achieved through an auxiliary pump cavity plug QS contained in a plunger section of an auxiliary pump liquid cavity FQ and used for driving heat conducting liquid to flow in a reciprocating mode, so that the wall of the FQ cavity is also a dynamic heat exchange interface between the heat conducting liquid D L and a plunger box front section part and a plunger front section part, the auxiliary pump cavity FQ is also a heat conducting cavity (heat conducting device), and based on the dual functions, the auxiliary pump is called as a built-in heat conducting reciprocating pump.

The auxiliary pump at the front section of the plunger assembly U100 of the present invention uses heat transfer fluid D L, and the auxiliary pump cavity plug QS reciprocates with the plunger, and the motion form of the auxiliary pump cavity plug QS is necessarily reciprocating motion and is completely inside the plunger box, so the fluid cavity of the auxiliary pump necessarily comprises at least 2 chambers bounded by the cavity plug, the chamber far away from the main fluid cylinder (usually, the chamber determining the single-stroke fluid discharge amount of the auxiliary pump) is called the auxiliary pump inner cavity, and the auxiliary pump chamber near the main fluid cylinder (usually, the chamber providing more heat transfer area of the auxiliary pump) is called the auxiliary pump front cavity.

In order to prevent the auxiliary pump moving member (auxiliary pump chamber plug QS) from colliding with the auxiliary pump fixing member (plunger case), the auxiliary pump at the front section of the plunger assembly U100 according to the present invention must leave a free space in front of the stroke end position and in front of the return stroke end position of the plunger.

The invention is basically characterized in that a reciprocating plunger assembly of a heat-conducting reciprocating pump is arranged in the front section of the plunger assembly, a built-in liquid cavity FQ is arranged between a plunger and a plunger box of the front section of the plunger assembly, the reciprocating plunger assembly comprises an auxiliary pump cavity plug QS for driving heat-conducting liquid to flow in a reciprocating mode through the plunger section of the FQ, the wall of the FQ cavity is also a dynamic heat exchange surface between a heat-conducting liquid D L and the plunger box and the plunger to form the heat-conducting reciprocating pump, namely the auxiliary pump, when the plunger moves to be close to a main liquid cylinder, D L of an auxiliary pump front cavity V6 discharges from a V6 interface N6 to flow to a heat transfer component HX for heat exchange, D L in the HX returns to a V1 for heat conduction through an auxiliary pump inner cavity interface N1 in a forward flow mode, when the plunger moves back to be far away from the main liquid cylinder, D L of 1 discharges to flow to the HX through N1, meanwhile, D L in the HX returns to V6 through N6, the operation between the plunger seal and the main liquid cylinder can be improved, the operation temperature of the plunger seal and the main liquid cylinder, the plunger assembly can be obviously reduced in the application range of the plunger assembly, and the plunger.

The construction and operation of the plunger assembly U100 to achieve the objectives of the present invention are suitable and some specific construction solutions are proposed.

The conveying of high-temperature or low-temperature main medium liquid is a ubiquitous working condition, so that the invention has certain universal application value.

The structural information of the plunger type reciprocating isolating pump is disclosed in the structural information of a publication A01, ①, the name of coal liquefaction technology, pages 118 to 120, ② retrieval uses book codes, ISBN codes, 7-5020-2335-6, ③ Chinese edition library CIP data letters (2003), No. 063071, ④ main codes, Shu-Gong-Ping, ⑤ publisher, coal industry publisher, and the publication introduces the working principle and schematic diagram of the isolating pump for keeping an isolating liquid interface, but does not relate to the plunger component of the built-in heat-conducting reciprocating pump.

The structural information of the plunger type reciprocating isolation pump is disclosed in the patent document A02: ① publication name, the direct coal liquefaction process and engineering (published: 2015 02/h), pages 232 to 233; ② retrieval uses written codes: ISBN codes: 9-78703-04308-23; ③ publication: Wuxiu chapter, Shuyiping, Likejian, Schensh; ④ publication: scientific publishing Co., Ltd.) which describes an oil-coal slurry plunger type reciprocating pump, the working mode of synchronously injecting oil (isolation oil, injection oil), flushing oil and sealing oil is adopted in the plunger sealing box, the stuffing box is a double stuffing box of a metal throttling ring and a special PTFE stuffing ring, the injection oil is injected into a high-pressure stuffing through a synchronously driven shaft head injection pump, the end stuffing is cooled and lubricated by adopting sealing oil, the flushing oil is injected between a low-pressure stuffing and a high-pressure stuffing, the flushing oil is injected into the low-pressure stuffing and the high-pressure stuffing, the action of lubricating and possibly bringing solid particles by the high-pressure stuffing is realized by using a 3 channel stuffing, 2 plunger type stuffing is arranged at the inner end of a main plunger type heat-exchange cylinder, the plunger type heat-exchange plunger assembly (heat-exchange plunger type heat-exchange plunger heat-exchange cylinder heat-exchange plunger heat-exchange.

The plunger reciprocating pump comprises a pump body, a liquid guide pipe, an inlet valve (comprising a valve ball and a valve seat), an outlet valve (comprising the valve ball and the valve seat), a plunger front sleeve, a stuffing box, stuffing and a steam heat-insulation jacket, the plunger reciprocating pump system also comprises driving, sealing oil, steam heat insulation, cooling water, lubricating oil and a variable frequency control system besides the plunger reciprocating pump, an injection pump is configured, an inlet branch pipe, an outlet branch pipe, a main pipe, an inlet buffer tank, an outlet buffer tank and a safety valve, in the document of the Chinese patent Z84, the stuffing box comprises three layers of stuffing which are arranged in sequence from the inside (close to a main liquid cylinder) to the outside (far away from the main liquid cylinder) along the axis of the plunger, the three layers of stuffing are respectively a first layer of stuffing, a second layer of stuffing and a third layer of stuffing, a flushing oil inlet and a flushing oil outlet which are used for flushing the surface of the plunger, a flushing oil inlet and a flushing oil outlet are arranged in the side wall of the stuffing box, the first layer of the stuffing box is respectively a first layer of stuffing, a second layer of stuffing and a third layer of stuffing, a flushing oil inlet and a flushing oil outlet are arranged between the first layer of the stuffing and the second layer of stuffing, a flushing oil outlet, the flushing oil outlet is a flushing oil outlet, the flushing oil outlet is a flushing oil outlet, the flushing oil outlet is arranged in the flushing oil outlet, the flushing oil outlet is arranged in the flushing.

The Chinese patent application No. 201811205520.0, whose application date is 2018, 10 and 10, is a plunger type reciprocating pump, which is suitable for the pressurized delivery of high-temperature oil-coal slurry of a direct coal hydrogenation liquefaction device, and the hydraulic end comprises a main hydraulic cylinder for sucking and discharging the coal slurry and a reciprocating plunger, the structure of a U-shaped flow path of isolation liquid in a conventional main hydraulic cylinder is reserved, and a separator is used for increasing a front flow channel of the isolation liquid contacting with the wall of the main hydraulic cylinder; the path of the injected oil flowing through the inner wall of the main liquid cylinder is prolonged, so that the existing path or the flow path of the injected oil in the main liquid cylinder is in an N shape or a W shape, and the like, and the probability of environment pollution caused by the pollution or leakage of a plunger front sleeve, a plunger and a plunger stuffing box by harmful substances (high-temperature liquid, solid slurry, corrosive or explosive or toxic or radioactive components and the like) is greatly reduced; the heat transfer area and the heat absorption capacity of the cooling main cylinder wall can be obviously increased by the oil injection preposed flow channel, and the heat transferred to the main cylinder wall and the plunger end can be greatly reduced by the steep reduction of the area of the high-temperature coal slurry contacting the main cylinder wall; the pump can convey liquid materials with higher temperature, obviously improves the operation safety of the plunger end and enlarges the application range of the reciprocating pump. The plunger stuffing box assembly of the pump set uses 3 layers of stuffing, 2 layers of stuffing seals are intensively arranged at the outer end (far away from the main cylinder end) of the stuffing box, and 1 layer of stuffing seals is arranged at the inner end (close to the main cylinder end) of the stuffing box; the plunger packing box sealing structure can be applied to working conditions of large flow (namely long plunger formation) and medium and high pressure (such as the pressure of 2.0-25.0 MPa), but does not relate to the plunger assembly of the built-in heat-conducting reciprocating pump.

Similar to the technical scheme of the invention, no report is found.

The first purpose of the invention is to provide a reciprocating plunger assembly with a heat-conducting reciprocating pump arranged in the front section of the plunger assembly.

The second purpose of the invention is to provide a reciprocating plunger pump, wherein the front section of the reciprocating plunger assembly used in the reciprocating plunger pump is provided with a built-in heat conduction reciprocating pump.

Disclosure of Invention

The invention discloses a reciprocating plunger assembly of a heat-conducting reciprocating pump arranged in the front section of the plunger assembly, which is characterized in that: