阅读说明：本技术 一种电控防泄漏脉动制退高压容积泵 (Electric control leakage-proof pulsating high-pressure-damping displacement pump ) 是由 马久河 杨志业 王海艳 万博 刘宪忠 李瑞峰 王伟 李昆 于 2020-04-26 设计创作，主要内容包括：本发明涉及一种电控防泄漏脉动制退高压容积泵,包括泵体和电动机,泵体设有入口和出口,入口连接进水管,出口连接出水管；所述进水管上设有电控进水阀,电控进水阀与入口之间的进水管上设有电控气阀；还包括由电源、主开关和并联设置的开启支路及停机支路形成的电控启停回路,开启支路包括并联同步开启的电控进水阀启动支路和电动机启动支路,停机支路包括同步开启的电控气阀支路和电动机支路以及串接在电动机支路上用于延时控制电源断路的延时模块,开启支路和停机支路设置联动切换开关。本发明能够在停机后自动排尽泵体内的液体,自动化操控,并能提高泵体使用寿命。(The invention relates to an electric control leakage-proof pulsating backward high-pressure displacement pump, which comprises a pump body and a motor, wherein the pump body is provided with an inlet and an outlet, the inlet is connected with a water inlet pipe, and the outlet is connected with a water outlet pipe; an electric control water inlet valve is arranged on the water inlet pipe, and an electric control air valve is arranged on the water inlet pipe between the electric control water inlet valve and the inlet; the system also comprises an electric control start-stop loop formed by a power supply, a main switch, a start branch and a stop branch which are arranged in parallel, wherein the start branch comprises an electric control water inlet valve start branch and a motor start branch which are synchronously opened in parallel, the stop branch comprises an electric control air valve branch and a motor branch which are synchronously opened and a delay module which is connected in series on the motor branch and is used for delaying the power supply to be in open circuit, and the start branch and the stop branch are provided with linkage change-over switches. The invention can automatically drain the liquid in the pump body after the machine is stopped, is automatically controlled and can prolong the service life of the pump body.)

1. An electrically controlled leakage-proof pulsating high-pressure back-braking displacement pump comprises a pump body and a motor, wherein the pump body is provided with an inlet and an outlet, the inlet is connected with a water inlet pipe, and the outlet is connected with a water outlet pipe; the method is characterized in that: an electric control water inlet valve is arranged on the water inlet pipe, and an electric control air valve is arranged on the water inlet pipe between the electric control water inlet valve and the inlet; the system also comprises an electric control start-stop loop formed by a power supply, a main switch, a start branch and a stop branch which are arranged in parallel, wherein the start branch comprises an electric control water inlet valve start branch and a motor start branch which are synchronously opened in parallel, the stop branch comprises an electric control air valve branch and a motor branch which are synchronously opened and a delay module which is connected in series on the motor branch and is used for delaying the power supply to be in open circuit, and the start branch and the stop branch are provided with linkage change-over switches.

2. An electronically controlled leak-proof pulsating high-pressure-relief positive displacement pump, as claimed in claim 1, wherein: the main switch is a single-control duplex switch, and the delay module is a time relay; the linkage change-over switch comprises a first movable contact, a second movable contact and a third movable contact which are linked, and also comprises a first normally closed fixed contact and a first normally open fixed contact which correspond to the first movable contact, a second normally closed fixed contact which corresponds to the second movable contact and a third normally open fixed contact which corresponds to the third movable contact; two linked movable contacts of the single-control duplex switch are respectively connected with an alternating current power supply and a direct current power supply; the normally open static contact of the alternating current power supply of the single-control duplex switch is connected with the first movable contact and the third movable contact of the linkage switch in parallel, the first normally closed static contact of the linkage switch is connected with the time relay in series and the motor to form a motor branch, the first normally open static contact of the linkage switch is connected with the motor to form a motor starting branch, and the third normally open static contact of the linkage switch is connected with the electric control water inlet valve to form an electric control water inlet valve starting branch; and a normally open static contact of a direct-current power supply of the single-control duplex switch is connected with a second movable contact of the linkage change-over switch, and a second normally closed static contact of the linkage change-over switch is connected with the electric control air valve to form an electric control air valve branch.

3. An electronically controlled leak-proof pulsating high-pressure-relief positive displacement pump, as claimed in claim 1, wherein: the entry and/or the export of the pump body are passed through water pressure pulsation braking ware and are connected inlet tube and outlet pipe, water pressure pulsation braking ware includes connector, outer pipeline, the elastic buffer energy storage body, core and apron, the one end and the pump body coupling of connector, the other end and the outer pipe connection of connector, the inner chamber of outer pipeline inlays and adorns the elastic buffer energy storage body and receives the core that water current pulsation strikeed with the axial compression elastic buffer energy storage body with the energy storage buffering, and the apron of the spacing elastic buffer energy storage body of one end installation crimping that the connector was kept away from to outer pipeline inner chamber.

4. An electronically controlled leak-proof pulsating high-pressure-relief positive displacement pump, as claimed in claim 3, wherein: the core body comprises a ring column and a pressing ring, the ring column is assembled in an inner cavity of the elastic buffering energy storage body, the axial length of the ring column is smaller than that of the elastic buffering energy storage body, a plurality of through radial water gaps are formed in the circumferential direction of the ring column, the pressing ring is integrally connected to the end part of the ring column and extends outwards to form a circular ring plate structure, and the pressing ring is pressed on the end face of one side, where water flow of the elastic buffering energy storage body comes; the elastic buffering energy storage body is made of a rubber spring, and the core body is made of a polytetrafluoroethylene fiber fabric self-lubricating composite material.

5. An electronically controlled leak-proof pulsating high-pressure-relief positive displacement pump, as claimed in claim 4, wherein: the connector is connected with the outlet of the pump body through a flange plate; the outer pipeline is of a step structure, a small end at the inner end of the outer pipeline is connected to the end part of the outer end of the connector through an internal thread, and a large end at the outer end of the outer pipeline is provided with a cover plate through an internal thread; an elastic buffering energy storage body is arranged between the step surface of the outer pipeline and the cover plate, the compression ring of the core body is inserted between the step surface and the inner end surface of the elastic buffering energy storage body, and the ring column of the core body is assembled in the inner cavity of the elastic buffering energy storage body.

6. An electronically controlled leak-proof pulsating high-pressure-relief positive displacement pump, as claimed in claim 4, wherein: the connector is connected with the inlet of the pump body through a flange plate; the outer pipeline is of a step structure, a small end at the inner end of the outer pipeline is connected to the end part of the outer end of the connector through an internal thread, and a large end at the outer end of the outer pipeline is provided with a cover plate through an internal thread; an elastic buffering energy storage body is arranged between the step surface of the outer pipeline and the cover plate, the compression ring of the core body is inserted between the cover plate and the outer end surface of the elastic buffering energy storage body, and the ring column of the core body is assembled in the inner cavity of the elastic buffering energy storage body.

7. An electronically controlled leak-proof pulsating high-pressure-relief positive displacement pump, as claimed in claim 1, wherein: the pump body comprises a pump shell, a driving shaft, a driven shaft, a stator, a rotor, a front end cover and a rear end cover, wherein the front end cover and the rear end cover are respectively provided with a sealing ring groove and an unloading structure; the front end cover and the rear end cover are respectively provided with a shaft hole for penetrating the driving shaft and the driven shaft, the outer end surfaces of the front end cover and the rear end cover are provided with bearing holes for mounting bearings corresponding to the shaft holes, a sealing ring groove is formed in the circumferential direction of the shaft hole and close to the inner side of the bearing holes, and a sealing ring is mounted in the sealing ring groove; the inner sides of the front end cover and the rear end cover are embedded in the pump shell, the inner end faces of the front end cover and the rear end cover are abutted to press fit the stator, the peripheries of the embedded parts of the inner sides of the front end cover and the rear end cover are provided with flow gathering grooves, radial vacuum unloading channels are arranged between the shaft holes and the flow gathering grooves in the planes of the flow gathering grooves, and the pump shell is provided with a drainage channel communicated with the flow gathering grooves and the inlet of the pump shell.

8. An electronically controlled leak-proof pulsating high-pressure-backed positive displacement pump as claimed in claim 7, wherein: the vacuum unloading channel between the shaft hole of the driving shaft and the shaft hole of the driven shaft is vertically communicated, a through horizontal channel is arranged between the plane where the vacuum unloading channel is located and the shaft hole, and two ends of the horizontal channel are communicated with the flow gathering groove.

9. An electronically controlled leak-proof pulsating high-pressure-backed positive displacement pump as claimed in claim 8, wherein: the front end cover and the rear end cover are connected with the pump shell through end cover sealing rings, a drainage ring groove is formed in the pump shell corresponding to the collecting groove, and a drainage channel communicated with a water inlet of the stator is formed in the position, corresponding to the horizontal channel, of the drainage ring groove.

10. An electronically controlled leak-proof pulsating high-pressure-backed positive displacement pump as claimed in claim 7, wherein: the rotor is a multi-lobe structure with more than 3 lobes.

Technical Field

The invention relates to the technical field of water pumps, in particular to an electric control leakage-proof pulsating backward high-pressure displacement pump.

Background

The water pump is a machine for conveying liquid or pressurizing liquid, and can transfer the mechanical energy of prime mover or other external energy to the liquid to increase the energy of liquid, and the liquid mainly used for conveying includes water, oil, acid-base liquid, emulsion, suspoemulsion, liquid metal, etc., and can also convey liquid, gas mixture and liquid containing suspended solid matter. The water pump can be classified into a volumetric water pump, a vane pump and the like according to different working principles. The displacement pump transfers energy by using the change of the volume of a working chamber, and is of a piston pump, a plunger pump, a gear pump, a diaphragm pump, a screw pump and the like; vane pumps transfer energy by the interaction of rotating vanes with water and are available in the types of centrifugal pumps, axial flow pumps, mixed flow pumps, and the like.

The positive displacement rotor pump is composed of a static pump casing and a rotor which performs deflection motion in the pump casing, and the side of the pump body, which is contacted with liquid, directly applies energy to the liquid in the form of static pressure, and discharges the liquid by virtue of the extrusion action of the rotor, and meanwhile, a space is reserved at the other side to form low pressure, so that the liquid is continuously sucked.

When the displacement pump works, the discharged water flow can generate large pulsation, so that the pressure is unstable, and corresponding pulsation reduction measures need to be taken. In the process of rotating the pump body, a small amount of liquid possibly leaks to the transmission shaft to influence the rotary seal of the pump body and the service life of the pump body, and the liquid leaked to the transmission shaft needs to be led out in time.

In addition, if the positive displacement pump needs to satisfy the high pressure condition, the water course design is comparatively complicated, and the water pump is shut down the back, is difficult to the water drainage in the pump body. In particular, the stored water must be drained during the northern freeze protection period (or at ambient temperatures below the freezing temperature of the liquid) to prevent frost cracking of the pump. When the water pump is stopped for a long time, the water in the pump is drained, the water pump is disassembled if necessary, and parts are cleaned for rust prevention treatment and are properly kept.

Disclosure of Invention

In order to solve the problems, the invention provides an electric control leakage-proof pulsation back-pressure high-pressure displacement pump which can automatically drain liquid in a pump body after the pump is stopped.

The technical scheme adopted by the invention is as follows: an electrically controlled leakage-proof pulsating high-pressure back-braking displacement pump comprises a pump body and a motor, wherein the pump body is provided with an inlet and an outlet, the inlet is connected with a water inlet pipe, and the outlet is connected with a water outlet pipe; an electric control water inlet valve is arranged on the water inlet pipe, and an electric control air valve is arranged on the water inlet pipe between the electric control water inlet valve and the inlet; the system also comprises an electric control start-stop loop formed by a power supply, a main switch, a start branch and a stop branch which are arranged in parallel, wherein the start branch comprises an electric control water inlet valve start branch and a motor start branch which are synchronously opened in parallel, the stop branch comprises an electric control air valve branch and a motor branch which are synchronously opened and a delay module which is connected in series on the motor branch and is used for delaying the power supply to be in open circuit, and the start branch and the stop branch are provided with linkage change-over switches.

As a further limitation to the above technical solution, the main switch is a single-control duplex switch, and the delay module is a time relay; the linkage change-over switch comprises a first movable contact, a second movable contact and a third movable contact which are linked, and also comprises a first normally closed fixed contact and a first normally open fixed contact which correspond to the first movable contact, a second normally closed fixed contact which corresponds to the second movable contact and a third normally open fixed contact which corresponds to the third movable contact; two linked movable contacts of the single-control duplex switch are respectively connected with an alternating current power supply and a direct current power supply; the normally open static contact of the alternating current power supply of the single-control duplex switch is connected with the first movable contact and the third movable contact of the linkage switch in parallel, the first normally closed static contact of the linkage switch is connected with the time relay in series and the motor to form a motor branch, the first normally open static contact of the linkage switch is connected with the motor to form a motor starting branch, and the third normally open static contact of the linkage switch is connected with the electric control water inlet valve to form an electric control water inlet valve starting branch; and a normally open static contact of a direct-current power supply of the single-control duplex switch is connected with a second movable contact of the linkage change-over switch, and a second normally closed static contact of the linkage change-over switch is connected with the electric control air valve to form an electric control air valve branch.

As further injects to above-mentioned technical scheme, the entry and/or the export of the pump body pass through water pressure pulsation braking ware and connect inlet tube and outlet pipe, water pressure pulsation braking ware includes connector, outer pipeline, the elastic buffer energy storage body, core and apron, the one end and the pump body coupling of connector, the other end and the outer pipe coupling of connector, the inner chamber of outer pipeline inlays and adorns the elastic buffer energy storage body and receives the core that rivers pulsation was strikeed and is used the energy storage buffering with axial compression elastic buffer energy storage body with the energy storage, and the apron of the spacing elastic buffer energy storage body of one end installation crimping that the connector was kept away from to the outer pipeline inner chamber.

As a further limitation to the above technical solution, the core includes a ring column and a pressing ring, the ring column is assembled in an inner cavity of the elastic buffering energy storage body, an axial length of the ring column is smaller than an axial length of the elastic buffering energy storage body, a plurality of through radial water gaps are formed in a circumferential direction of the ring column, the pressing ring is integrally connected to an end portion of the ring column and extends outward to form a circular ring plate structure, and the pressing ring is pressed and connected to an end face of the elastic buffering energy storage body where water flows to one side; the elastic buffering energy storage body is made of a rubber spring, and the core body is made of a polytetrafluoroethylene fiber fabric self-lubricating composite material.

As a further limitation to the above technical solution, the connector is connected to an outlet of the pump body through a flange; the outer pipeline is of a step structure, a small end at the inner end of the outer pipeline is connected to the end part of the outer end of the connector through an internal thread, and a large end at the outer end of the outer pipeline is provided with a cover plate through an internal thread; an elastic buffering energy storage body is arranged between the step surface of the outer pipeline and the cover plate, the compression ring of the core body is inserted between the step surface and the inner end surface of the elastic buffering energy storage body, and the ring column of the core body is assembled in the inner cavity of the elastic buffering energy storage body.

As a further limitation to the above technical solution, the connector is connected to an inlet of the pump body through a flange; the outer pipeline is of a step structure, a small end at the inner end of the outer pipeline is connected to the end part of the outer end of the connector through an internal thread, and a large end at the outer end of the outer pipeline is provided with a cover plate through an internal thread; an elastic buffering energy storage body is arranged between the step surface of the outer pipeline and the cover plate, the compression ring of the core body is inserted between the cover plate and the outer end surface of the elastic buffering energy storage body, and the ring column of the core body is assembled in the inner cavity of the elastic buffering energy storage body.

As a further limitation to the above technical scheme, the pump body comprises a pump shell, a driving shaft, a driven shaft, a stator, a rotor, a front end cover and a rear end cover, wherein the front end cover and the rear end cover are both provided with a sealing ring groove and an unloading structure; the front end cover and the rear end cover are respectively provided with a shaft hole for penetrating the driving shaft and the driven shaft, the outer end surfaces of the front end cover and the rear end cover are provided with bearing holes for mounting bearings corresponding to the shaft holes, a sealing ring groove is formed in the circumferential direction of the shaft hole and close to the inner side of the bearing holes, and a sealing ring is mounted in the sealing ring groove; the inner sides of the front end cover and the rear end cover are embedded in the pump shell, the inner end faces of the front end cover and the rear end cover are abutted to press fit the stator, the peripheries of the embedded parts of the inner sides of the front end cover and the rear end cover are provided with flow gathering grooves, radial vacuum unloading channels are arranged between the shaft holes and the flow gathering grooves in the planes of the flow gathering grooves, and the pump shell is provided with a drainage channel communicated with the flow gathering grooves and the inlet of the pump shell.

As a further limitation to the technical scheme, a vacuum unloading channel between the shaft hole of the driving shaft and the shaft hole of the driven shaft is vertically communicated, a through horizontal channel is formed between the plane where the vacuum unloading channel is located and the two shaft holes, and two ends of the horizontal channel are communicated with the flow gathering groove.

As a further limitation to the technical scheme, an end cover sealing ring is arranged at the joint of the front end cover and the back end cover with the pump shell, a drainage ring groove is formed in the pump shell corresponding to the collecting groove, and a drainage channel communicated with a water inlet of the stator is formed in the position, corresponding to the horizontal channel, of the drainage ring groove.

As a further limitation to the above technical solution, the rotor has a multi-lobed structure with more than 3 lobes.

According to the electric control leakage-proof pulsating high-pressure-braking displacement pump, in the shutdown process of a pump body, water is drained and air blowing is sealed through a leakage-proof electric control start-stop loop, when the displacement pump stops working, a time relay circuit is switched on, so that the displacement pump continues to rotate to drain water in the pump body, meanwhile, an electric control air valve is opened, air blowing is carried out on the pump body, and the power supply is cut off for shutdown after air blowing is carried out for a period of time; realize automatic drainage and seal, satisfy pump body work demand.

The invention adds a water pressure pulsation damper at the inlet and/or outlet of the pump body, when water enters and discharges from the water inlet pipe and/or the water outlet pipe, the water flows into the core body, and impacts a plurality of water gaps on the circumference of the core body to drive the compression elastic buffering energy storage body to store energy, thereby damping the pulsation of the water. The flange structure convenient to detach of connector, the stair structure and the apron of outer pipeline are convenient for spacing elastic buffer energy storage body. The multi-petal rotor structure has a water dividing effect, and the multi-petal rotor can output water for many times when rotating, so that the water output frequency is improved, the single water output is reduced, and the pulse effect of water output pulsation on a pump body and a pipeline is reduced.

In the process of rotating the pump body, water leaked to the transmission shaft is unloaded to the flow gathering groove through the self-pressing plate and the cover plate with the centrifugal vacuum type unloading structure, so that the water flows back to the water inlet to achieve rotary sealing. Each end cover is provided with a plurality of vacuum unloading channels which are arranged in a radial shape, water jet is thrown out to be centrifugal force, other side branches form vacuum, and the plurality of vacuum unloading channels are arranged in a radial shape and finally flow together in a flow collecting groove to flow back to a water inlet of the pump shell. And a sealing ring mounting ring groove is formed in each end cover, so that sealing is further increased, and the sealing ring is matched with an unloading channel of the self-pressing plate to effectively achieve sealing.

Drawings

FIG. 1 is a schematic structural view of an electrically controlled leak-proof pulsating high-pressure-relief positive displacement pump according to the present invention;

FIG. 2 is a schematic view of the pump body and the hydraulic pulsation damper according to the present invention;

FIG. 3 is a schematic view of the configuration of the hydraulic pulsation damper of FIG. 2;

FIG. 4 is a cross-sectional view of the pump body of the present invention;

FIG. 5 is a schematic perspective view of a front end cap according to the present invention;

FIG. 6 is a front view of the front end cap of the present invention;

FIG. 7 is an X-X view of FIG. 6;

FIG. 8 is a schematic perspective view of a pump housing;

FIG. 9 is a schematic structural view of a core of the present invention;

fig. 10 is a schematic view of the hydraulic pulsation damper at the inlet of the pump body according to the present invention (the coupling head is not shown).

In the figure: 1-driving shaft, 2-driven shaft, 3-gear box, 4-driving gear, 5-driven gear, 6-front end cover, 61-vacuum unloading channel, 62-gathering groove, 63-sealing ring groove, 7-pump shell, 71-drainage ring groove, 72-drainage channel, 8-rear end cover, 9-front self-pressing plate, 10-rear self-pressing plate, 11-stator, 12-self-lubricating layer, 13-rotor, 15-hydraulic pressure pulsation damper, 151-core body, 1511-ring column, 1512-pressing ring, 152-outer pipeline, 153-elastic buffer energy storage body, 154-cover plate and 155-connector; k₁Single control dual switch, K₂-ganged change-over switch, K_2-1-a first moving contact, K_2-2-a second moving contact, K_2-3-a third moving contact, 16-a time relay, 17-a motor, 18-an electrically controlled water inlet valve, 19-an electrically controlled air valve, 20-a water inlet pipe, 21-a water outlet pipe, 22-a pump body.

Detailed Description

The invention is described in further detail below with reference to the figures and the embodiments.