阅读说明：本技术 一种高速注水泵冲洗冷却系统 (High-speed water injection pump flushing cooling system ) 是由 韩安达 蔡连水 叶怀池 林灿 杨杰 于 2019-11-25 设计创作，主要内容包括：本发明公开了一种高速注水泵冲洗冷却系统,包括一段泵,内设一段一级机封,一段泵的叶轮与其泵体之间形成一段一级密封腔；二段泵,内设二段一级机封与二段二级机封,二段泵的叶轮与其泵体之间形成二段一级密封腔与二段二级密封腔；介质输送通道,连通所述一段泵与二段泵；主冷却通道,设置第一截流降压孔板与第一压力变送器并且与二段泵出口连通,用户DCS控制系统,与所述第一压力变送器、第二压力变送器、第三压力变送器、第一二阀组、第二二阀组均连通。本发明通过设置所述冲洗冷却系统保证了机封正常冲洗冷却,减小了因摩擦生热对泵元件的磨损；保证了泵工作时的高精度要求,进而保证泵的长期稳定运行,提高了泵的寿命。(The invention discloses a high-speed water injection pump flushing and cooling system, which comprises a section of pump, a first-stage mechanical seal and a second-stage sealing cavity, wherein the first-stage mechanical seal is arranged in the first-stage pump; the two-stage pump is internally provided with a two-stage first-stage mechanical seal and a two-stage second-stage mechanical seal, and a two-stage first-stage sealing cavity and a two-stage second-stage sealing cavity are formed between an impeller of the two-stage pump and a pump body of the two-stage pump; the medium conveying channel is communicated with the first-stage pump and the second-stage pump; the main cooling channel is provided with a first cutoff pressure reduction pore plate, a first pressure transmitter, a second valve group and a second valve group, and is communicated with the outlet of the second-stage pump. The flushing cooling system ensures normal flushing and cooling of the mechanical seal, and reduces abrasion to pump elements due to heat generated by friction; the high-precision requirement of the pump during working is guaranteed, long-term stable operation of the pump is further guaranteed, and the service life of the pump is prolonged.)

1. A high-speed water injection pump flush cooling system, comprising:

the first-stage pump is internally provided with a first-stage mechanical seal, and a first-stage sealing cavity is formed between an impeller of the first-stage pump and the first-stage mechanical seal;

the two-stage pump is internally provided with a two-stage one-stage mechanical seal and a two-stage mechanical seal, a two-stage one-stage sealing cavity is formed between an impeller of the two-stage pump and a one-stage seal of the impeller, and a two-stage sealing cavity is formed between the one-stage seal and the two-stage seal;

the medium conveying channel is communicated with the first-stage pump and the second-stage pump;

the main flushing cooling channel is provided with a first cutoff pressure reduction pore plate, a first pressure transmitter and a second-stage pump outlet which are communicated;

the second section high-pressure washing and cooling channel is provided with a second cutoff pressure reduction pore plate, a second pressure transmitter and a first and second valve bank, the second section high-pressure washing and cooling channel is communicated with the main washing and cooling channel after being reduced in pressure by the first cutoff pressure reduction pore plate, an outlet of the second section high-pressure washing and cooling channel is opposite to the second section primary sealing cavity, and the first and second valve bank is used for adjusting the pressure at the outlet of the second section high-pressure washing and cooling channel;

the second-section secondary flushing and cooling channel is provided with a third cutoff pressure reduction pore plate, a third pressure transmitter and a second valve set, the second-section secondary flushing and cooling channel is communicated with the main flushing and cooling channel after being reduced in pressure by the first cutoff pressure reduction pore plate, an outlet of the second-section secondary flushing and cooling channel is opposite to the second-section secondary sealing cavity, and the second valve set is used for adjusting the pressure at the outlet of the second-section secondary flushing and cooling channel;

and the user DCS control system is communicated with the first pressure transmitter, the second pressure transmitter, the third pressure transmitter, the first valve bank and the second valve bank.

2. The high-speed water injection pump flush cooling system of claim 1, wherein: the main flushing cooling channel is further provided with a main two-valve set connected with a user DCS control system, and the main two-valve set is located on the downstream of the medium flowing direction of the main flushing cooling channel and located on the upstream of the first pressure transmitter.

3. The high-speed water injection pump flush cooling system of claim 1, wherein: the high-speed water injection pump flushing and cooling system further comprises a backflow channel for enabling redundant media to flow back to the first-stage pump, and an inlet of the backflow channel is communicated with the second-stage sealing cavity.

4. The high-speed water injection pump flush cooling system of claim 1, wherein: the high-speed water injection pump flushing and cooling system further comprises a section of one-stage flushing and cooling channel, the section of one-stage flushing and cooling channel is communicated with the outlet of the section of pump, the section of one-stage flushing and cooling channel is provided with a fourth intercepting and depressurizing hole plate, and the outlet of the section of one-stage flushing and cooling channel is opposite to the section of one-stage sealing cavity.

5. The flush cooling system of a high-speed water injection pump of claim 4, wherein: one section one-level washes cooling channel and still sets up fourth pressure transmitter and the second valves of third that are connected with user DCS control system, fourth pressure transmitter and second valves of third are located the low reaches of fourth damming step-down orifice plate.

Technical Field

The invention relates to a lubricating and cooling system of a pump, in particular to a flushing and cooling system of a high-speed water injection pump.

Background

High-speed centrifugal pump, high-speed compressor, high-speed water injection pump drive its impeller rotation by the output shaft of gear box generally, and the impeller has the clearance when high-speed rotation between the static parts such as casing that is static relatively, and this clearance department forms relative high pressure, and relative high pressure easily makes the medium of carrying reveal. Therefore, such a mechanical apparatus requires a sealing process with high precision. It is common in the art to seal in the form of a mechanical seal. The high-speed rotation between the sealing element and the high-speed rotation part such as the impeller is easy to generate frictional heat due to high-speed rotation, the frictional heat can accelerate the frictional loss between parts and the aging of the parts, and the relative thermal deformation can also be generated between the parts due to high-temperature heat, the high-precision requirement required by the normal operation of the pump body can not be met even if the deformation is small, and the original sealing function of the mechanical sealing element is lost over time. Therefore, it has been the direction of effort of those skilled in the art to overcome this technical problem.

Disclosure of Invention

In order to solve the technical problem, the invention provides a high-speed water injection pump flushing and cooling system which comprises a section of pump, a section of first-stage mechanical seal and a section of first-stage sealing cavity, wherein the section of first-stage mechanical seal is arranged in the section of pump;

the two-stage pump is internally provided with a two-stage first-stage mechanical seal and a two-stage second-stage mechanical seal, and a two-stage first-stage sealing cavity and a two-stage second-stage sealing cavity are formed between an impeller of the two-stage pump and a pump body of the two-stage pump;

the medium conveying channel is communicated with the first-stage pump and the second-stage pump;

the main flushing cooling channel is provided with a first cutoff pressure reduction pore plate, a first pressure transmitter and a second-stage pump outlet which are communicated;

the second section high-pressure washing and cooling channel is provided with a second cutoff pressure reduction pore plate, a second pressure transmitter and a first and second valve bank, the second section high-pressure washing and cooling channel is communicated with the main washing and cooling channel after being reduced in pressure by the first cutoff pressure reduction pore plate, an outlet of the second section high-pressure washing and cooling channel is opposite to the second section primary sealing cavity, and the first and second valve bank is used for adjusting the pressure at the outlet of the second section high-pressure washing and cooling channel;

the second-section secondary flushing and cooling channel is provided with a third cutoff pressure reduction pore plate, a third pressure transmitter and a second valve set, the second-section secondary flushing and cooling channel is communicated with the main flushing and cooling channel after being reduced in pressure by the first cutoff pressure reduction pore plate, an outlet of the second-section secondary flushing and cooling channel is opposite to the second-section secondary sealing cavity, and the second valve set is used for adjusting the pressure at the outlet of the second-section secondary flushing and cooling channel;

the user DCS control system is connected with the first pressure transmitter, the second pressure transmitter and the third pressure transmitter through instrument lines and belongs to electrical connection; the main second valve group, the first second valve group and the second valve group are respectively communicated with the first pressure transmitter, the second pressure transmitter, the third pressure transmitter and the instrument pressure leading pipe;

preferably, the main flushing cooling channel is further provided with a main two-valve set connected with a user DCS control system, and the main two-valve set is located downstream of the medium flowing direction of the main flushing cooling channel and upstream of the first pressure transmitter.

Preferably, the high-speed water injection pump flushing cooling system further comprises a backflow channel for backflow of redundant media to the first-stage pump, and an inlet of the backflow channel is communicated with the second-stage seal cavity.

Preferably, the high-speed water injection pump flushing and cooling system further comprises a section of one-stage flushing and cooling channel, the section of one-stage flushing and cooling channel is communicated with an outlet of the section of pump, the section of one-stage flushing and cooling channel is provided with a fourth intercepting and depressurizing pore plate, and an outlet of the section of one-stage flushing and cooling channel is opposite to the section of one-stage sealing cavity.

Preferably, the first stage flushing cooling channel is further provided with a fourth pressure transmitter connected with a user DCS control system.

The invention has the beneficial effects that: the flushing cooling system is provided with a main flushing cooling channel, a two-section high-pressure flushing cooling channel and a two-section two-stage flushing cooling channel of a self-flushing cycle, the flushing liquid/buffer solution is directly introduced into the pumping liquid, local materials are used, an additional flushing system is not needed, and the flushing cooling system is simple and convenient; high-pressure water is led out from the outlet of the pump and is reduced in pressure through the step-by-step pore plates, and is respectively washed and cooled for the mechanical seal of the first-stage pump and the mechanical seal of the second-stage pump, and the self-sealing in a liquid sealing mode is formed during washing and cooling, so that the overall sealing performance of the high-speed water injection pump is enhanced; the key pressure points of each pipeline are respectively provided with a pressure transmitter, the pressure transmitter carries out overrun alarm and interlocking reaction on the point pressure, and the high-speed water injection pump is stopped in time when the pressure data in the pipeline is detected to be abnormal, so that the running safety of the high-speed water injection pump is ensured, and the problems of production accidents, low production efficiency and the like caused by leakage, pipeline blockage and the like are effectively avoided; the flushing cooling system ensures normal flushing and cooling of the mechanical seal, and reduces abrasion to pump elements due to heat generated by friction; the high-precision requirement of the pump during working is guaranteed, long-term stable operation of the pump is further guaranteed, and the service life of the pump is prolonged.

Drawings

FIG. 1 is a schematic diagram of the high-speed water injection pump flushing and cooling system of the present invention after being connected to a gear box.

FIG. 2 is a schematic structural view of a high-speed water injection pump flushing and cooling system according to the present invention

Reference numerals:

1. a first-stage pump, 101, a first-stage mechanical seal, 102, a first-stage sealing cavity, 2, a second-stage pump, 201, a second-stage mechanical seal, 202, a second-stage mechanical seal, 204, a second-stage first-stage sealing cavity, 205, a second-stage sealing cavity, 3, a medium conveying channel, 4, a main flushing cooling channel, 401, a first cutoff pressure reduction pore plate, 402, a first pressure transmitter, 5, a second-stage high-pressure flushing cooling channel, 501, second interception step-down orifice plate, 502, second pressure transmitter, 6, first two valves, 7, two sections of second grade wash cooling channel, 701, third interception step-down orifice plate, 702, third pressure transmitter, 703, second two valves, 8, user DCS control system, 9, main two valve groups, 10, return passage, 11, one section one-level wash cooling channel, 1101, fourth interception step-down orifice plate, 1102 fourth pressure transmitter, 12, third two valves.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The invention will be further described with reference to the accompanying drawings.

In order to solve the above technical problems, the present invention provides a high-speed water injection pump flushing cooling system to solve the problems of the prior art. Referring to the attached drawings 1 and 2, the high-speed water injection pump flushing and cooling system comprises a first-stage pump 1, a second-stage pump 2, a medium conveying channel 3, a main flushing and cooling channel 4, a second-stage high-pressure flushing and cooling channel 5, a second-stage flushing and cooling channel 7 and a user DCS control system 8. The medium to be conveyed enters from an inlet A of the first-stage pump 1, is conveyed through the medium conveying channel 3 and then is output from an outlet B of the second-stage pump 2, a first-stage mechanical seal 101 is arranged in the first-stage pump 1, and a first-stage sealing cavity 102 is formed between an impeller of the first-stage pump 1 and a pump body of the first-stage pump 1; a second-stage first-stage mechanical seal 201 and a second-stage mechanical seal 202 are arranged in the second-stage pump 2, a second-stage first-stage sealing cavity 204 is formed between an impeller of the second-stage pump 2 and the second-stage first-stage mechanical seal 201, and a second-stage sealing cavity 205 is formed between the impeller of the second-stage pump 2 and the second-stage mechanical seal 202; the medium conveying channel 3 is communicated with the first-stage pump 1 and the second-stage pump 2; the main flushing cooling channel 4 is provided with a first cutoff pressure reduction pore plate 401, a first pressure transmitter 402 and a second-stage pump 2 outlet; the two-section high-pressure flushing and cooling channel 5 is provided with a second intercepting and depressurizing hole plate 501, a second pressure transmitter 502 and a first two-valve set 6, the two-section high-pressure flushing and cooling channel 5 is communicated with a main flushing and cooling channel 4 depressurized by a first intercepting and depressurizing hole plate 401, an outlet of the two-section high-pressure flushing and cooling channel 5 is opposite to a two-section primary sealing cavity 204, and the first two-valve set 6 is used for adjusting the pressure at the outlet of the two-section high-pressure flushing and cooling channel 5; the two-section two-stage flushing cooling channel 7 is provided with a third cutoff pressure reduction pore plate 701, a third pressure transmitter 702 and a second valve bank 703, the two-section two-stage flushing cooling channel 7 is communicated with the main flushing cooling channel 4 subjected to pressure reduction through the first cutoff pressure reduction pore plate 401, the outlet of the two-section two-stage flushing cooling channel 7 is opposite to the two-section two-stage sealing cavity 205, and the second valve bank 703 is used for adjusting the pressure at the outlet of the two-section two-stage flushing cooling channel 7.

And the user DCS control system 8 is communicated with the first pressure transmitter 402, the second pressure transmitter 502, the third pressure transmitter 702, the first valve bank 6 and the second valve bank 703. The user DCS control system 8 is electrically connected with the first pressure transmitter 402, the second pressure transmitter 502 and the third pressure transmitter 702 through instrument lines; the main valve group 9, the first and second valve groups 6 and the second valve group 703 are respectively communicated with the first pressure transmitter 402, the second pressure transmitter 502, the third pressure transmitter 702 and the instrument pressure leading pipe. The first pressure transmitter 402, the second pressure transmitter 502 and the third pressure transmitter 702 respectively transmit the pressure data of each corresponding pipeline to the user DCS control system 8 (or a user control center), the user DCS control system 8 receives the pressure data sent by each transmission and detects the pressure data in real time, when the pressure data is abnormal, the problems of pipeline leakage, pipeline blockage and the like generally exist, at the moment, the user DCS control system 8 controls the first pressure transmitter 402, the second pressure transmitter 502, the third pressure transmitter 702, the first second valve group 6, the second valve group 703, the first-stage pump 1, the second-stage pump 2, the motor and the like to be shut down, so that the high-speed water injection pump is in a shutdown state, and further performs subsequent work such as maintenance and repair.

Referring to fig. 1, the present invention is described in detail by taking an embodiment of the present invention as an example, in the present invention, the first-stage pump 1 and the second-stage pump 2 are driven by a double-output-shaft gear box, and two high-speed shafts of the double-output-shaft gear box respectively link the first-stage pump 1 and the second-stage pump 2. The first-stage pump 1 pumps a medium (such as water and the like) to be conveyed to a medium conveying channel 3, and the medium is output by the second-stage pump 2 through the medium conveying channel 3. When the first-stage pump 1 and the second-stage pump 2 rotate, rotating parts such as an impeller and the like can generate heat through friction with mechanical seals such as a pump shell and the like when rotating at a high speed, and media and the like can overflow through gaps of the mechanical seals under the action of high pressure, so that the second-stage high-pressure flushing cooling channel 5 and the second-stage secondary flushing cooling channel 7 are designed to guide the media, and the second-stage first-stage mechanical seal 201 and the second-stage mechanical seal 202 are respectively cooled and flushed, and the further sealing effect is achieved.

As can be seen from the above description of the invention, the flushing cooling system of the invention is provided with the main flushing cooling channel 4, the two-stage high-pressure flushing cooling channel 5 and the two-stage secondary flushing cooling channel 7 of the self-flushing cycle, the flushing liquid/buffer liquid is directly introduced into the pumping liquid, the local materials are obtained, the additional flushing system is not required, and the system is simple and convenient; high-pressure water (flushing fluid) is led out from the outlet of the pump and is subjected to pressure reduction through the stepwise pore plates, and then the machine seal of the first-stage pump 1 and the machine seal of the second-stage pump 2 are respectively subjected to flushing cooling, and liquid seal type self-sealing is formed during flushing cooling, so that the overall sealing performance of the high-speed water injection pump is enhanced; set up pressure transmitter respectively at the key pressure point of each pipeline, report to the police and interlock reaction to its point pressure transfinites, in time shuts down when detecting the pressure data in this pipeline and appearing unusually, has guaranteed the security of high-speed water injection pump operation, and the effectual production accident and the low scheduling problem of production efficiency of having avoided causing because of revealing, pipeline blocking etc..

Specifically, the main flushing cooling channel 4 is further provided with a main two-valve group 9 connected with a user DCS control system 8, and the main two-valve group 9 is located downstream of the main flushing cooling channel 4 in the medium flow direction and upstream of the first pressure transmitter 402.

Specifically, the high-speed water injection pump flushing cooling system further comprises a backflow channel 10 for enabling redundant media to flow back to the first-stage pump 1, an inlet of the backflow channel 10 is communicated with the second-stage sealing cavity 205, and a liquid outlet is formed in the tail end of the backflow channel 10. Set up return channel 10 can further wash cooling channel 5 and two-stage segment second grade to two-stage segment high pressure according to the required pressure value of sealed cooling and wash the pressure of cooling channel 7 and adjust, and the suitability is strong, can avoid causing the damage to the component of machine seal department because of the pressure is too high.

Specifically, the high-speed water injection pump washes cooling system still includes one section one-level and washes cooling channel 11, one section one-level washes cooling channel 11 and one section outlet intercommunication of pump 1, one section one-level washes cooling channel 11 and sets up fourth step-down orifice plate 1101 that dams, one section one-level wash cooling channel 11 the export with one section one-level seal chamber 102 is relative. The function of the first-stage flushing cooling channel 11 is the same as that of the second-stage high-pressure flushing cooling channel 5 and the second-stage flushing cooling channel 7, and the first-stage flushing cooling channel is mainly used for cooling, flushing and sealing the first-stage sealing cavity 102 of the first-stage pump 1.

Specifically, the first-stage flushing cooling channel 11 is further provided with a fourth pressure transmitter 1102 and a third second valve bank 12 which are connected with the user DCS control system 8, and the fourth pressure transmitter 1102 and the third second valve bank 12 are located at the downstream of the fourth shutoff pressure reducing orifice plate 1101. The user DCS control system 8 is connected with the fourth pressure transmitter 1102 through an instrument line, and belongs to electrical connection; the third second valve set 12 is communicated with a fourth pressure transmission 1102 and a meter pressure leading pipe, and the fourth pressure transmission 1102 and the third second valve set 12 are positioned at the downstream of a fourth cutoff pressure reducing orifice plate 1101.

The flushing cooling system ensures normal flushing and cooling of the mechanical seal, and reduces abrasion to pump elements due to heat generated by friction; the high-precision requirement of the pump during working is guaranteed, long-term stable operation of the pump is further guaranteed, and the service life of the pump is prolonged.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.