CN214741986U

CN214741986U - Differential pressure pump

Info

Publication number: CN214741986U
Application number: CN202120473774.1U
Authority: CN
Inventors: 宋大江; 谢超
Original assignee: Huaqiang Chemical Group Co Ltd
Current assignee: Huaqiang Chemical Group Co Ltd
Priority date: 2021-03-04
Filing date: 2021-03-04
Publication date: 2021-11-16
Anticipated expiration: 2031-03-04

Abstract

The utility model discloses a differential pressure pump, which comprises a pump body, wherein an overpressure adjusting mechanism is arranged on a liquid outlet pipe of the pump body in a matching way, the overpressure adjusting mechanism comprises a guide pipe communicated with the liquid outlet pipe of the pump body and a pressure relief head communicated with the guide pipe, and a circulating starting assembly is communicated between the middle part of the guide pipe and the liquid outlet pipe of the pump body; when the pressure in the circulation starting assembly exceeds a set pressure value, the circulation starting assembly conducts the pressure relief head by liquid flowing in the guide pipe; compared with the prior art, the utility model, when the pressure in the pump body reaches the set pressure value, make the pressure release head switch on in the circulation starts the subassembly through the liquid that flows in the pipe to carry out the pressure release to the pump body, make the pump body be in normal pressure within range operation all the time, with the life of the spare part that improves in the pump body.

Description

Differential pressure pump

Technical Field

The utility model relates to a pump structure technical field, concretely relates to differential pressure pump.

Background

The differential pressure pump is mainly used for copper washing process of mixed gas before ammonia synthesis, and uses high-pressure rich liquor discharged from the lower part of a copper washing tower as power instead of a three-plunger pump to pump regenerated lean liquor to the upper part of the copper washing tower without being driven by a motor so as to wash and purify the mixed gas. Because the three-plunger pump is not driven by a motor, the motor power of the three-plunger pump is saved, and the three-plunger pump is high-efficiency energy-saving equipment with very obvious energy-saving effect and intuition.

However, when the pressure in the differential pressure pump exceeds the set maximum pressure value for a long time in the operation process of the differential pressure pump, the service life of parts in the differential pressure pump is greatly shortened.

SUMMERY OF THE UTILITY MODEL

To the not enough that exists among the prior art, the utility model aims to provide a differential pressure pump to solve prior art, differential pressure pump is in the operation in-process, when pressure in it surpassed its maximum pressure value of setting for a long time, will shorten the problem of the life of spare part in the differential pressure pump greatly.

In order to achieve the above purpose, the utility model adopts the following technical scheme: a differential pressure pump comprises a pump body, wherein an overpressure adjusting mechanism is arranged on a liquid outlet pipe of the pump body in a matched mode, the overpressure adjusting mechanism comprises a guide pipe communicated with the liquid outlet pipe of the pump body and a pressure relief head communicated with the guide pipe, and a circulation starting assembly is communicated between the middle of the guide pipe and the liquid outlet pipe of the pump body; when the pressure value in the circulation starting assembly exceeds the set pressure value, the circulation starting assembly enables the pressure relief head to be conducted through liquid flowing in the guide pipe.

Compared with the prior art, the utility model discloses following beneficial effect has:

the differential pressure pump comprises a pump body and an overpressure adjusting mechanism, when the pressure in the pump body reaches a set pressure value, the pressure relief head is conducted in the circulation starting assembly through liquid flowing in the guide pipe, so that the pump body is relieved, the pump body is enabled to operate within a normal pressure range all the time, and the service life of parts in the pump body is prolonged.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present invention;

FIG. 2 is an enlarged view of a portion A of FIG. 1;

FIG. 3 is a schematic structural view of the pressure relief head of FIG. 1 in a sealed state;

FIG. 4 is a schematic structural view of the pressure relief head in FIG. 1 in a conducting state;

FIG. 5 is a partial enlarged view of portion B of FIG. 3;

fig. 6 is a schematic layout view of the right-angle notch and the rotation limiting block along the direction C in fig. 5.

Detailed Description

The present invention will be described in further detail with reference to the following embodiments:

reference numerals in the drawings of the specification include: the pump body 1, a guide pipe 2, a pressure relief head 3, a pressure relief cylinder 31, an annular mounting plate 32, an annular conduction plate 33, an adjusting plate 34, a conduction hole 35, a locking spring 36, a liquid guide pipe 4, a blade 5, an adjusting abutting plate 6, a rotating shaft 7, a reset casing spring 8, a right-angle notch 9, a rotating limiting block 10, an annular sealing groove 11, an annular sealing plate 12, a small pipe section 41, a conical variable-diameter section 42 and a large pipe section 43.

As shown in fig. 1, an embodiment of the present invention provides a differential pressure pump, including a pump body 1, an overpressure adjusting mechanism is cooperatively disposed on a liquid outlet pipe of the pump body 1, the overpressure adjusting mechanism includes a conduit 2 communicated with the liquid outlet pipe of the pump body 1 and a pressure relief head 3 communicated with the conduit 2, and a circulation starting assembly is communicated between the middle part of the conduit 2 and the liquid outlet pipe of the pump body 1; when the pressure value in the circulation starting assembly exceeds the set pressure value, the circulation starting assembly conducts the pressure relief head 3 by the liquid flowing in the conduit 2.

The differential pressure pump comprises a pump body 1 and an overpressure adjusting mechanism, when the pressure in the pump body 1 reaches a set pressure value, a pressure relief head 3 is conducted in a circulation starting assembly through liquid flowing in a guide pipe 2, so that the pump body 1 is subjected to pressure relief, the pump body 1 is always in a normal pressure range to operate, and the service life of parts in the pump body 1 is prolonged.

Combine fig. 3 and 4, according to the utility model discloses a further embodiment, a differential pressure pump still includes the configuration optimization to pressure release head 3, and the pressure release head 3 of adoption includes the pressure release section of thick bamboo 31 and the fixed annular mounting panel 32 and the annular conduction board 33 that set up in pressure release section of thick bamboo 31 with the pipe 2 intercommunication, and annular mounting panel 32 and the parallel interval arrangement of annular conduction board 33, and the annular conduction board 33 is close to annular mounting panel 32 one side and supports the regulating plate 34 that has carried out the seal to the via hole 35 in its middle part mutually, is connected with a plurality of locking springs 36 between regulating plate 34 and the annular mounting panel 32.

When the pressure in the pump body 1 reaches a set pressure value, the pressure is transmitted through the liquid flowing in the pump body 1 to enable the circulation starting assembly to enable the adjusting plate 34 to be separated from the seal of the conducting hole 35, so that the pressure relief cylinder 31 is conducted, and redundant pressure in the pump body 1 is relieved through the pressure relief cylinder 31; the annular mounting plate 32 serves the purpose of supporting the plurality of locking springs 36, the adjustment plate 34 is abutted against the annular conduction plate 33 by the plurality of locking springs 36, and the adjustment plate 34 seals the conduction hole 35; and the plurality of locking springs 36 also reset the adjusting plate 34 after the pressure relief head 3 completes the pressure relief operation, so that the pressure relief cylinder 31 is turned off again.

Combine fig. 3-fig. 6, according to the utility model discloses a further embodiment, a differential pressure pump, still include the configuration optimization to the circulation start-up subassembly, the circulation start-up subassembly of adoption is including the catheter 4 of intercommunication between the middle part of pipe 2 and the drain pipe of the pump body 1, distance between the liquid outlet end of catheter 4 and the inlet of the drain pipe of the pump body 1 is greater than the distance between the inlet of the drain pipe of the pump body 1 and the inlet of pipe 2, the rotation is provided with blade 5 in the catheter 4, blade 5 links to each other with catheter 4 inner wall through the spacing rotation of pressure portion, and the spacing rotation of pressure portion passes the lateral wall of catheter 4, be connected with behind pipe 2 lateral wall and the annular conduction board 33 and rotate the regulation butt plate 6 that sets up in conducting hole 35.

By enabling the distance between the liquid outlet end of the liquid guide pipe 4 and the liquid inlet of the liquid outlet pipe of the pump body 1 to be larger than the distance between the liquid inlet of the liquid outlet pipe of the pump body 1 and the liquid inlet of the guide pipe 2, liquid in the liquid outlet pipe of the pump body 1 enters the guide pipe 2 and then is guided into the liquid guide pipe 4 to return to the liquid outlet pipe of the pump body 1 for circulation, and the pressure in the pump body 1 is transmitted into the liquid guide pipe 4; after the pressure limiting rotating part structure is designed in the liquid guide pipe 4 to reach a set pressure value, the liquid flowing in the liquid guide pipe 4 drives the blades 5 to rotate, the adjusting abutting plate 6 rotates for a certain angle through the transmission of the pressure limiting rotating part, the adjusting abutting plate 6 drives the adjusting plate 34 to be far away from the annular conduction plate 33, so that the conduction hole 35 is conducted, and the pressure relief head 3 is conducted to relieve pressure; after the pressure relief is completed, the pressure limiting rotating part and the locking springs 36 have the reset function to reset the adjusting plate 34, so that the conducting hole 35 is sealed, and the pressure relief head 3 stops the pressure relief.

Specifically, the pressure limiting rotation part of adoption includes axis of rotation 7, and 5 fixed sleeves of blade are established at axis of rotation 7 middle part, and open on the 4 inner walls of catheter has the mounting groove, and 7 tip rotations of axis of rotation set up in the mounting groove, and the cover is equipped with the cover spring 8 that resets of arranging in the mounting groove on the axis of rotation 7.

Because the reset sleeve spring 8 has a certain supporting force, when the pressure flowing in the liquid guide tube 4 reaches a certain value, the blade 5 can drive the rotating shaft 7 to rotate, so that the adjusting abutting plate 6 rotates in the through hole 35, the adjusting abutting plate 6 abuts against the adjusting plate 34, the adjusting plate 34 is far away from the annular conducting plate 33, the through hole 35 is communicated, and the pressure relief head 3 relieves the pressure; after the pressure relief is completed, the adjusting abutting plate 6 and the adjusting plate 34 are both reset under the elastic reset force of the reset sleeve spring 8 and the plurality of locking springs 36, and the pressure relief head 3 stops the pressure relief.

In the utility model, a right-angle notch 9 is arranged on the outer wall of the end part of the rotating shaft 7 arranged in the mounting groove, and one of the two inner walls of the rotating shaft 7 in the rotating direction of the right-angle notch 9 is abutted with a rotating limiting block 10 which is integrally formed with the inner wall of the mounting groove; when the rotating shaft 7 rotates until the rotating limiting block 10 abuts against the other inner wall, the adjusting abutting plate 6 abuts against the adjusting plate 34 to enable the adjusting plate 34 to be far away from the annular conduction plate 33.

The rotation angle of adjusting the abutting plate 6 is limited by the matching of the right-angle notch 9 and the rotation limiting block 10, so that the adjusting abutting plate 6 can only rotate to 90 degrees, the adjusting abutting plate 6 is prevented from continuously rotating, and after the pressure relief head 3 completes pressure relief, the adjusting abutting plate 6 and the adjusting plate 34 are adjusted to offset for equal reverse movement to reset.

With reference to fig. 3 and 4, according to another embodiment of the present invention, the differential pressure pump further comprises an annular sealing groove 11 formed on the end surface of the annular conduction plate 33 close to the adjustment plate 34 and sleeved outside the conduction hole 35, and the adjustment plate 34 is connected with an annular sealing plate 12 movably embedded in the annular sealing groove 11.

The sealing state of the regulating plate 34 to the through hole 35 is improved through the matching of the annular sealing groove 11 and the annular sealing plate 12, so that the pressure relief head 3 has good sealing performance when not conducted.

As shown in fig. 2, according to another embodiment of the present invention, the differential pressure pump further comprises a liquid guiding tube 4 optimized, and the liquid guiding tube 4 of the present invention is designed to include a small tube section 41 communicated with the middle part of the liquid guiding tube 2 and a large tube section 43 communicated with the liquid outlet tube of the pump body 1, the small tube section 41 is communicated with the large tube section 43 through a tapered diameter-changing section 42, and the blade 5 is rotatably disposed in the large tube section 43.

The large pipe section 43, the tapered reducing section 42 and the small pipe section 41 form a liquid guide pipe 4, and liquid flowing in the large pipe section 43 is depressurized, so that when the pressure in the pump body 1 reaches a set pressure relief pressure, the requirement on the structural strength of the reset sleeve spring 8 is lower.

Finally, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the present invention can be modified or replaced by other means without departing from the spirit and scope of the present invention, which should be construed as limited only by the appended claims.

Claims

1. The differential pressure pump comprises a pump body and is characterized in that an overpressure adjusting mechanism is arranged on a liquid outlet pipe of the pump body in a matched mode, the overpressure adjusting mechanism comprises a guide pipe communicated with the liquid outlet pipe of the pump body and a pressure relief head communicated with the guide pipe, and a circulating starting assembly is communicated between the middle of the guide pipe and the liquid outlet pipe of the pump body; when the pressure value in the circulation starting assembly exceeds the set pressure value, the circulation starting assembly enables the pressure relief head to be conducted through liquid flowing in the guide pipe.

2. A differential pressure pump as claimed in claim 1, wherein: the pressure relief head comprises a pressure relief cylinder communicated with the guide pipe, and an annular mounting plate and an annular conduction plate which are fixedly arranged in the pressure relief cylinder, the annular mounting plate and the annular conduction plate are arranged in parallel at intervals, one surface of the annular conduction plate, which is close to the annular mounting plate, is abutted against an adjusting plate for sealing a conduction hole in the middle of the annular conduction plate, and a plurality of locking springs are connected between the adjusting plate and the annular mounting plate; the circulation starting assembly controls the sealing state of the regulating plate to the through hole by the liquid flowing in the guide pipe.

3. A differential pressure pump according to claim 2, wherein: the circulation starting assembly comprises a liquid guide pipe communicated between the middle part of the guide pipe and the liquid outlet pipe of the pump body, the distance between the liquid outlet end of the liquid guide pipe and the liquid inlet of the liquid outlet pipe of the pump body is larger than the distance between the liquid inlet of the liquid outlet pipe of the pump body and the liquid inlet of the guide pipe, blades are rotatably arranged in the liquid guide pipe, the blades are connected with the inner wall of the liquid guide pipe through a pressure limiting rotating part, and the pressure limiting rotating part penetrates through the side wall of the liquid guide pipe, the side wall of the guide pipe and the annular conduction plate and then is connected with an adjusting abutting plate rotatably arranged in the conduction hole; after the pressure in the liquid guide pipe reaches a set pressure value, the pressure limiting rotating part rotates by a certain angle to enable the adjusting abutting plate to drive the adjusting plate to be far away from the annular flow guide plate.

4. A differential pressure pump according to claim 3, wherein: the pressure limiting rotating part comprises a rotating shaft, the blade fixing sleeve is arranged at the middle of the rotating shaft, a mounting groove is formed in the inner wall of the liquid guide pipe, one end of the rotating shaft is rotatably arranged in the mounting groove, and a reset sleeve spring arranged in the mounting groove is sleeved on the rotating shaft.

5. A differential pressure pump according to claim 4, wherein: the outer wall of the end part of the rotating shaft arranged in the mounting groove is provided with a right-angle notch, and one of the two inner walls of the right-angle notch in the rotating direction of the rotating shaft is abutted against a rotating limiting block integrally formed with the inner wall of the mounting groove; when the rotating shaft rotates to the position where the rotating limiting block abuts against the other inner wall, the adjusting abutting plate abuts against the adjusting plate to enable the adjusting plate to be far away from the annular conduction plate.

6. A differential pressure pump according to any one of claims 2-5, characterized in that: the end face of the annular conduction plate, which is close to the adjusting plate, is provided with an annular sealing groove sleeved outside the conduction hole, and the adjusting plate is connected with an annular sealing plate movably embedded in the annular sealing groove.

7. A differential pressure pump according to any one of claims 3-5, characterized in that: the liquid guide pipe comprises a small pipe section communicated with the middle part of the guide pipe and a large pipe section communicated with the liquid outlet pipe of the pump body, the small pipe section is communicated with the large pipe section through a conical reducing section, and the blades are rotatably arranged in the large pipe section.