CN220286546U - Relief valve structure of oil-submerged pump - Google Patents

Abstract

The utility model discloses a pressure relief valve structure of an oil-submerged pump, which comprises a pressure relief valve seat, a pressure relief valve core, a backflow sealing valve, a backflow valve lower valve clack, a backflow valve upper valve clack and a backflow valve spring, wherein an oil inlet is arranged at the top of the pressure relief valve seat, a filter screen is fixedly connected to the inner side of the oil inlet, the filter screen is in a conical cover shape, the outer wall of the filter screen is in a circular arc conical surface, a drain outlet communicated with the outside is formed in the bottom of the inner side of the oil inlet, and the drain outlet is positioned at the bottom of the filter screen. According to the utility model, the conical cover-shaped filter screen is arranged in the oil inlet of the pressure relief valve seat, and the drain outlet is arranged at the corresponding position of the bottom of the oil inlet and the bottom of the filter screen, so that impurities blocked by the filter screen in fluid can roll down along the gradient of the outer wall of the filter screen by using the slope of the circular arc conical surface of the outer wall of the filter screen through the flowing impact force, and are discharged from the drain outlet, so that the influence of accumulation of impurities filtered by the outer wall of the filter screen on the subsequent filtering effect is avoided, and the pressure relief effect of the pressure relief valve is improved.

Description

Relief valve structure of oil-submerged pump

Technical Field

The utility model relates to the technical field of oil-submerged pumps, in particular to a pressure relief valve structure of an oil-submerged pump.

Background

The oil-submerged pump uses the principle of positive pressure pushing, thereby fundamentally avoiding the phenomenon of air resistance, and thoroughly solving the problems that the self-priming pump cannot solve under the conditions of high temperature environment, high lift and long distance, such as less oil output (gas-liquid two phases), environmental pollution and even no oil output. In addition, the oil-submerged pump of the gas station can be provided with a plurality of guns (4-8 guns), and the self-sucking pump can only be provided with one gun, so that the oil-submerged pump simplifies an oil pipeline, brings great convenience to installation and maintenance and has highest cost performance.

The Chinese patent with the publication number of CN209604275U discloses a high-flow oil-submerged pump, which adopts a socket type wire connector, is convenient to install and maintain, and the pressure relief valve is used for relieving pressure under the pressure of more than 0.2MPa, so that the safety of an oiling pipeline is protected, and the oil temperature of the built-in thermal protector reaches 70 ℃ to cut off a power supply.

In this patent, through the relief valve that back flow seal valve, back flow valve lower valve clack, back flow valve spring, back flow valve case, back flow valve upper valve clack, relief valve disk seat and back flow valve filter screen are constituteed, back flow valve filter screen is installed in oil inlet department and is filtered impurity protection sealing member, but because general filter screen is dull and stereotyped, long-time use, the impurity of separation is deposited on the surface of filter screen easily, influence fluid transmission effect and the filter effect of filter screen, simultaneously because the oil-submerged pump needs submergence use in the fluid, inconvenient regular clearance is carried out to the filter screen, influence its result of use, for this reason, the relief valve structure of oil-submerged pump is proposed at present and is solved above-mentioned problem.

Disclosure of Invention

The utility model aims to provide a relief valve structure of an oil-submerged pump, so as to solve the problems in the prior art.

In order to achieve the above purpose, the present utility model provides the following technical solutions: the pressure relief valve structure of the oil-submerged pump comprises a pressure relief valve seat, a pressure relief valve core, a backflow sealing valve, a backflow valve lower valve clack, a backflow valve upper valve clack and a backflow valve spring, wherein an oil inlet is formed in the top of the pressure relief valve seat, and a filter screen is fixedly connected to the inner side of the oil inlet;

the filter screen is cone cover body form, the outer wall of filter screen is circular arc conical surface, the drain that is linked together with outside has been seted up to the inboard bottom of oil inlet, just the drain is located the bottom position of filter screen.

Preferably, an oil outlet is arranged at the bottom of the inner side of the pressure relief valve seat, and the backflow sealing valve is fixedly arranged at the top of the inner side of the oil outlet and used for sealing between the pressure relief valve core and the oil outlet.

Preferably, the inner side of the filter screen is provided with a retainer in a fitting way for auxiliary support of the filter screen, and the bottom of the retainer is fixedly connected with the oil inlet.

Preferably, the inner side of the pressure relief valve seat and the bottom position of the oil inlet are provided with arc chamfers, and the side sides of the arc chamfers correspond to the bottom position of the retainer.

Preferably, the retainer comprises a conical head, a plurality of support vertical rods are fixedly connected to the bottom of the conical head at intervals, and an arc-shaped cross rod is fixedly connected between two adjacent support vertical rods.

Preferably, the pressure relief valve core, the lower return valve clack, the upper return valve clack and the return valve spring are all arranged on the inner side of the pressure relief valve seat, the pressure relief valve core is arranged in the middle of the lower return valve clack and the upper return valve clack, and the return valve spring is arranged between the lower return valve clack and the upper return valve clack.

The utility model has the technical effects and advantages that:

according to the utility model, the conical cover-shaped filter screen is arranged in the oil inlet of the pressure relief valve seat, and the drain outlet is arranged at the corresponding position of the bottom of the oil inlet and the bottom of the filter screen, so that impurities blocked by the filter screen in fluid can fall along the gradient of the outer wall of the filter screen by using the gradient of the circular arc conical surface of the outer wall of the filter screen through the flowing impact force, and are discharged from the drain outlet, so that the influence of accumulation of impurities filtered by the outer wall of the filter screen on the subsequent filtering effect is avoided, and the pressure relief effect of the pressure relief valve is improved.

Drawings

FIG. 1 is a schematic diagram of the front cross-sectional structure of the present utility model.

Fig. 2 is a schematic view of the front structure of the retainer of the present utility model.

Fig. 3 is a schematic perspective view of a filter screen according to the present utility model.

In the figure: 1. a pressure relief valve seat; 2. a pressure relief valve core; 3. a backflow sealing valve; 4. a lower valve clack of the reflux valve; 5. a valve clack on the reflux valve; 6. a return valve spring; 7. an oil outlet; 8. an oil inlet; 9. a filter screen; 10. a sewage outlet; 11. a retainer; 111. a conical head; 112. a supporting vertical rod; 113. an arc-shaped cross bar; 12. and (5) arc chamfering.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

The utility model provides a relief valve structure of a submersible pump as shown in figures 1-3, which comprises a relief valve seat 1, a relief valve core 2, a backflow sealing valve 3, a backflow valve lower valve clack 4, a backflow valve upper valve clack 5 and a backflow valve spring 6, wherein the relief valve core 2, the backflow valve lower valve clack 4, the backflow valve upper valve clack 5 and the backflow valve spring 6 are all arranged at the inner side of the relief valve seat 1, the relief valve core 2 is arranged at the middle parts of the backflow valve lower valve clack 4 and the backflow valve upper valve clack 5, the backflow valve spring 6 is arranged between the backflow valve lower valve clack 4 and the backflow valve upper valve clack 5, the outer wall of the relief valve seat 1 is provided with external threads connected with a main valve body, the installation on the main valve body is convenient, when the pipeline pressure is larger than a preset pressure value, a conveying medium pushes the relief valve core 2 to separate from the backflow sealing valve 3, the medium flows back from a gap to achieve the purpose of relief, when the pipeline pressure is smaller than a preset pressure value, the pressure relief valve core 2 and the backflow sealing valve 3 are pushed to be attached and sealed by means of the elastic force of the backflow valve spring 6, the pressure relief valve core 2 moves up and down and is guided and positioned by means of the backflow valve lower valve clack 4 and the backflow valve upper valve clack 5, the oil outlet 7 is arranged at the bottom of the inner side of the pressure relief valve seat 1, the backflow sealing valve 3 is fixedly arranged at the top of the inner side of the oil outlet 7 and is used for sealing between the pressure relief valve core 2 and the oil outlet 7, when the pressure relief valve core 2 and the backflow sealing valve 3 at the inner side of the oil outlet 7 are separated to generate a gap, a medium flows out from the oil outlet 7 along the gap to achieve the purpose of pressure relief and backflow, the top of the pressure relief valve seat 1 is provided with an oil inlet 8, a filter screen 9 is fixedly connected to the inner side of the oil inlet 8, and when the medium enters from the oil inlet 8 and contacts with the filter screen 9, the filter screen 9 utilizes the aperture of the medium to block and filter impurities in the medium, impurities are prevented from entering the pressure relief valve seat 1 to influence the sealing effect inside the pressure relief valve seat;

the filter screen 9 is circular cone cover body shape, the outer wall of filter screen 9 is circular cone cover body shape structure, design into circular cone cover body shape structure filter screen 9, not only can increase the filtration area, simultaneously make the surface of filter screen 9 be circular cone, have a slope gradient, so make filter screen 9 after filtering the impurity in the medium, impurity can roll down along filter screen 9 surface slope, the impact force of medium is utilized simultaneously, still can reach the scrubbing effect to filter screen 9, make the impurity of filtering out can not collect on filter screen 9 and influence filter screen 9's result of use, drain 10 that is linked together with the outside has been seted up to the inboard bottom of oil inlet 8, and drain 10 is located filter screen 9's bottom position, drain 10's setting, can make the impurity that rolls from filter screen 9 outer wall discharge, make impurity can not collect at pressure release disk seat 1's oil inlet 8 department, so can further avoid impurity to cause the influence to filter screen 9.

In the preferred embodiment, the inboard laminating of filter screen 9 is provided with holder 11 for the auxiliary stay of filter screen 9, holder 11 bottom and oil inlet 8 fixed connection, through setting up holder 11 in the inboard of filter screen 9, make the impact resistance effect and the fastness of filter screen 9 stronger, the result of use is better.

Preferably, the inside of the pressure relief valve seat 1 and the bottom position of the oil inlet 8 are provided with the arc chamfer 12, the side of the arc chamfer 12 corresponds to the bottom position of the retainer 11, and the arrangement of the arc chamfer 12 can play a role in converging, so that the medium filtered by the filter screen 9 can smoothly enter the pressure relief valve seat 1.

Wherein, holder 11 includes cone head 111, the bottom interval fixedly connected with a plurality of support montants 112 of cone head 111, fixedly connected with arc horizontal pole 113 between two adjacent support montants 112 carries out the support of cone head 111 through a plurality of support montants 112, cooperates cone head 111 to the location of filter screen 9, and a plurality of arc horizontal poles 113 are again cooperated and are fixed to the connection between a plurality of support montants 112 for the holistic rigidity intensity of holder 11 is higher, and is stronger to the support steadiness of filter screen 9.

Finally, it should be noted that: the foregoing description is only illustrative of the preferred embodiments of the present utility model, and although the present utility model has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described, or equivalents may be substituted for elements thereof, and any modifications, equivalents, improvements or changes may be made without departing from the spirit and principles of the present utility model.

Claims (6)

1. The pressure relief valve structure of the oil-submerged pump comprises a pressure relief valve seat (1), a pressure relief valve core (2), a backflow sealing valve (3), a backflow valve lower valve clack (4), a backflow valve upper valve clack (5) and a backflow valve spring (6), wherein an oil inlet (8) is formed in the top of the pressure relief valve seat (1), and a filter screen (9) is fixedly connected to the inner side of the oil inlet (8);

the method is characterized in that: the filter screen (9) is cone cover body-shaped, the outer wall of the filter screen (9) is an arc conical surface, a drain outlet (10) communicated with the outside is formed in the bottom of the inner side of the oil inlet (8), and the drain outlet (10) is located at the bottom of the filter screen (9).

2. The pressure relief valve structure of the submersible pump according to claim 1, wherein an oil outlet (7) is arranged at the bottom of the inner side of the pressure relief valve seat (1), and the backflow sealing valve (3) is fixedly arranged at the top of the inner side of the oil outlet (7) and used for sealing between the pressure relief valve core (2) and the oil outlet (7).

3. The pressure relief valve structure of the submersible pump according to claim 1, characterized in that a retainer (11) is attached to the inner side of the filter screen (9) and used for auxiliary support of the filter screen (9), and the bottom of the retainer (11) is fixedly connected with the oil inlet (8).

4. A relief valve structure of a submersible pump according to claim 3, characterized in that an arc chamfer (12) is provided on the inner side of the relief valve seat (1) and at the bottom position of the oil inlet (8), and the side of the arc chamfer (12) corresponds to the bottom position of the retainer (11).

5. A pressure relief valve structure of an oil submerged pump according to claim 3, characterized in that the retainer (11) comprises a conical head (111), the bottom of the conical head (111) is fixedly connected with a plurality of support vertical rods (112) at intervals, and an arc-shaped cross rod (113) is fixedly connected between two adjacent support vertical rods (112).

6. The pressure relief valve structure of the submersible pump according to claim 2, characterized in that the pressure relief valve core (2), the lower return valve clack (4), the upper return valve clack (5) and the return valve spring (6) are all arranged on the inner side of the pressure relief valve seat (1), the pressure relief valve core (2) is arranged in the middle of the lower return valve clack (4) and the upper return valve clack (5), and the return valve spring (6) is arranged between the lower return valve clack (4) and the upper return valve clack (5).