CN211875195U

CN211875195U - Pressure relief valve device

Info

Publication number: CN211875195U
Application number: CN202020248335.6U
Authority: CN
Inventors: 薛肇江; 黄亦骁
Original assignee: Huirun Electrical Co ltd
Current assignee: Huirun Electrical Co ltd
Priority date: 2020-03-03
Filing date: 2020-03-03
Publication date: 2020-11-06
Anticipated expiration: 2030-03-03

Abstract

The utility model discloses a relief valve device, include: locate the pressure release disk seat between pump assembly and the oil feed cover subassembly, a plugging device and be used for the elastic device who extrudees plugging device on the draining hole for the draining hole of shutoff pressure release disk seat, elastic device is connected with plugging device, the pressure release disk seat is equipped with the draining hole that is used for with the pump assembly hydraulic fluid port intercommunication along the axial, the pressure release disk seat is equipped with the cavity that is used for holding plugging device and elastic device, the cavity is the convergent mouth with the one end of draining hole intercommunication, plugging device and the setting of draining hole closely laminating, with effective shutoff draining hole, plugging device and convergent mouth cooperation set up, in order to form the gap that is used for draining the pressure release, the pressure release disk seat is along being equipped with the draining passageway that is used for with oil feed cover subassembly oil inlet intercommunication, draining. This device can effectively carry out the pressure release draining to the oil pump and handle, and moreover, the simple structure of this device, convenient to use can use widely.

Description

Pressure relief valve device

Technical Field

The utility model relates to a pressure release technical field, more specifically say, relate to a relief valve device.

Background

In the prior art, a pressure relief valve used in a low-pressure oil transfer pump generally adopts a steel ball and a safety valve, and the pressure relief valve has better sealing performance. However, the gap between the steel ball and the wall of the safety valve hole is too small, that is, the leakage area around the pressure release valve is small, so that the pressure of the product cannot be well released, and the difference between the working pressure of the product and the maximum pressure release pressure is large, for example, the working pressure of the product is 0.02MPa, but the maximum working pressure which can be reached by the product reaches 0.2MPa, so that the pressure of the product cannot be well released. In order to ensure the use effect of the pressure release valve in the low-pressure oil delivery pump, the relationship between the delivery flow and the maximum pressure needs to be balanced, and when the delivery flow of the product is higher as much as possible, the maximum working pressure of the product is smaller.

In summary, it is an urgent need to solve the problem of providing a device capable of effectively performing pressure relief processing on a product.

SUMMERY OF THE UTILITY MODEL

In view of this, the present invention provides a pressure relief valve device, which can effectively perform pressure relief processing on a product.

In order to achieve the above object, the present invention provides the following technical solutions:

a pressure relief valve apparatus comprising: a pressure relief valve seat arranged between the pump component and the oil inlet cover component, a plugging device for plugging an oil drainage hole of the pressure relief valve seat and an elastic device for extruding the plugging device on the oil drainage hole, the elastic device is connected with the plugging device, the pressure relief valve seat is axially provided with the oil drainage hole which is communicated with the oil port of the pump component, the pressure relief valve seat is provided with a cavity for accommodating the plugging device and the elastic device, one end of the cavity communicated with the oil drainage hole is a tapered opening, the plugging device is tightly attached to the oil drainage hole, so as to effectively block the oil drainage hole, the blocking device is matched with the tapered opening to form a gap for oil drainage and pressure relief, and the pressure relief valve seat is radially provided with an oil drainage channel communicated with an oil inlet of the oil inlet cover assembly, and the oil drainage channel is communicated with the tapered opening.

Preferably, the blocking device is a pressure relief valve plate.

Preferably, the pressure relief valve plate is provided with a groove for plugging the oil drainage hole, two ends of the groove are provided with bulges matched with the shape and the size of the gradually-reduced opening, and the bulges and the gradually-reduced opening form a gap.

Preferably, the gap between the pressure relief valve plate and the pressure relief valve seat is 0.1mm to 0.2 mm.

Preferably, the elastic device is a cylindrical spring, one end of the spring in the elastic direction is connected with the blocking device, the other end of the spring is connected with the pressure relief valve seat, and the spring is in a compressed state in the initial state, so that the blocking device compresses the oil drainage hole.

Preferably, the spring is a tower-shaped spring with a centering effect, so that the resetting effect of the plugging device is improved.

Use the utility model provides a during the relief valve device, because the oil pressure of pump assembly is greater than the oil pressure of oil feed lid subassembly, plugging device can receive the pressure differential effect between pump assembly and the oil feed lid subassembly in draining hole department, and this pressure differential can make plugging device break away from the draining hole, nevertheless because plugging device is connected resilient means, resilient means can apply the extrusion force to plugging device to make plugging device sticis on the draining hole. When the oil pump is in a normal working state, the oil pressure in the pump is more normal and stable, the plugging device can overcome the acting force of the pressure difference under the action of the elastic device, and effectively plug the oil drainage hole so as to avoid the phenomenon that the oil drainage hole leaks or only small amount of leakage occurs at the oil drainage hole.

However, when the oil pump takes place the oil-out and is blockked up the abnormal phenomena such as, can lead to the inside oil pressure of oil pump to increase rapidly, at this moment, the pressure differential effort is greater than the resilient means effort, make plugging device can be backed down by fluid and separate with the draining hole, at this in-process, the gap is bigger and bigger, fluid can be quick under great pressure differential effect loop through the draining hole, the slit, the gradual necking down, the draining passageway, finally discharge through the oil inlet, meanwhile, can discharge the sudden increase oil pressure in the oil pump, then make the oil pump resume normal oil pressure and running state.

Because the pressure release valve seat is provided with the oil drainage hole and the reducing port along the axial direction, the oil drainage channel is arranged along the radial direction and is communicated with the reducing port. And, plugging device and the setting of closely laminating of draining hole, plugging device and convergent mouth cooperation setting, plugging device and convergent mouth have formed the gap that is used for draining the pressure release, are provided with like this and do benefit to the relief valve device and carry out the pressure release draining operation, are favorable to balancing the flow and the maximum pressure of oil pump, also can make the maximum operating pressure of oil pump under high flow running state less.

To sum up, the utility model provides a relief valve device can effectively carry out the pressure release draining to the oil pump and handle, and moreover, this device simple structure, convenient to use can use widely.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a pressure relief valve device provided by the present invention;

fig. 2 is a schematic diagram of the oil flow direction when the relief valve device performs pressure relief and oil drainage when the oil pump is blocked.

In FIGS. 1-2:

1 is pressure release disk seat, 2 for plugging device, 3 for resilient means, 4 for draining the hole, 5 for draining the passageway, 6 for the recess, 7 for the arch, 8 for the gap, 9 for the pump package spare, 10 for the oil feed lid subassembly.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

The core of the utility model is to provide a relief valve device, it can be effectively carry out the pressure release draining to the oil pump and handle, moreover, this device simple structure, convenient to use can use widely.

Please refer to fig. 1 and fig. 2, wherein fig. 1 is a schematic structural diagram of a pressure relief valve device provided by the present invention; fig. 2 is a schematic diagram of the oil flow direction when the relief valve device performs pressure relief and oil drainage when the oil pump is blocked.

The embodiment provides a relief valve device, includes: locate pressure release disk seat 1 between pump assembly 9 and oil feed cover subassembly 10, a plugging device 2 that is used for the draining hole 4 of shutoff pressure release disk seat 1 and be used for extruding plugging device 2 at the resilient means 3 on draining hole 4, resilient means 3 is connected with plugging device 2, pressure release disk seat 1 is equipped with along the axial and is used for the draining hole 4 with pump assembly 9 hydraulic fluid port intercommunication, pressure release disk seat 1 is equipped with the cavity that is used for holding plugging device 2 and resilient means 3, the cavity is the convergent mouth with the one end of draining hole 4 intercommunication, plugging device 2 closely laminates the setting with draining hole 4, with effective shutoff draining hole 4, plugging device 2 sets up with the convergent mouth cooperation, in order to form the gap 8 that is used for draining the pressure release, pressure release disk seat 1 is equipped with along radial and is used for the draining passageway 5 that communicates with oil feed cover subassembly 10 oil inlet, draining passageway 5 communicates with the.

It should be noted that some low pressure oil pumps require a high delivery flow rate and a low maximum working pressure, however, the high delivery flow rate and the low working pressure are contradictory, and in general, a high delivery flow rate is often accompanied by a high working pressure. In order to keep the maximum operating pressure of the low-pressure oil pump low, the pressing force of the elastic device 3 cannot be too great, and a low pressing force may not be able to press the closure device 2 well against the oil drainage opening 4.

In normal operation, the leakage phenomenon may have occurred at the relief valve device of the oil pump, in order to minimize the leakage amount, but not to make the maximum working pressure of the relief valve device too large, the oil pump can be made to leak at the sealing end surface when operating, but the leaked flow can only flow out from the gap 8 formed by the matching arrangement of the plugging device 2 and the tapered opening, so that the leakage amount of the oil pump can be controlled by controlling the size of the gap 8, the sealing performance of the device is improved without increasing the extrusion force of the elastic device 3, and the increase of the maximum working pressure of the oil pump can be avoided.

Therefore, when the oil pump is blocked due to some unpredictable reasons, the oil pressure in the oil pump or in the pipeline suddenly rises, and the oil pump needs to be subjected to pressure relief and oil drainage treatment at the moment. That is to say when the oil pressure of high pressure district rises to being greater than the extrusion force of resilient means 3, plugging device 2 can slowly be backed up under the pressure differential effect, and slowly separates with draining hole 4 for gap 8 slowly increases, and meanwhile, fluid can begin from gap 8, flows out around plugging device 2. Along with the plugging device 2 by jack-up higher, the plugging device 2 is farther with draining hole 4 separation, and the gap 8 between plugging device 2 and the convergent mouth is bigger, and the earial drainage passageway of fluid is bigger, can be so that fluid discharge capacity increase, can make the fine quilt of the operating pressure that the oil pump increases suddenly finally to discharge to make oil pump pressure resume to normal operating pressure.

The structure, shape, size, position, material and the like of the pressure relief valve seat 1, the plugging device 2 and the elastic device 3 can be determined according to actual conditions and actual requirements in the actual application process.

It should be noted that, when using the utility model provides a relief valve device, because the oil pressure of pump assembly 9 is greater than the oil pressure of oil feed cover subassembly 10, plugging device 2 can receive the pressure differential effect between pump assembly 9 and the oil feed cover subassembly 10 in draining hole 4 department, and this pressure differential can make plugging device 2 break away from draining hole 4, nevertheless because plugging device 2 is connected with resilient means 3, resilient means 3 can exert the extrusion force to plugging device 2 to make plugging device 2 sticiss on draining hole 4. When the oil pump is in normal operating condition, the oil pressure ratio is more normal stable in the pump, and plugging device 2 can overcome the effort of pressure differential under resilient means 3's effect, effectively plugs up draining hole 4 to avoid draining hole 4 to take place the leakage phenomenon or draining hole 4 department only takes place the small amount and leaks.

However, when the oil pump takes place the oil-out and is blockked up etc. abnormal phenomena, can lead to the inside oil pressure of oil pump to increase rapidly, at this moment, the pressure differential effort is greater than 3 effort of resilient means, make plugging device 2 can be backed down by fluid and separate with draining hole 4, at this in-process, gap 8 is bigger and bigger, fluid can be quick under great pressure differential effect loop through draining hole 4, the slit, the convergent mouth, draining channel 5, finally discharge through the oil inlet, meanwhile, can discharge the sudden increase oil pressure in the oil pump, then make the oil pump resume normal oil pressure and running state.

Because pressure release disk seat 1 is equipped with draining hole 4 and convergent mouth along the axial, is equipped with draining passageway 5 along radial, draining passageway 5 and convergent mouth intercommunication. And, plugging device 2 and 4 inseparable laminating settings of draining hole, plugging device 2 and convergent mouth cooperation setting, plugging device 2 and convergent mouth have formed the gap 8 that is used for draining the oil pressure release, set up like this and be favorable to the relief valve device to carry out the operation of pressure release draining, are favorable to balancing the flow and the maximum pressure of oil pump, also can make the maximum operating pressure of oil pump under high flow running state less.

The shapes, structures, sizes, positions and the like of the oil drainage hole 4, the reducing port and the oil drainage channel 5 can be determined in the actual application process according to actual conditions and actual requirements.

On the basis of the pressure relief valve device, preferably, the blocking device 2 is a pressure relief valve plate. Set up plugging device 2 into the pressure release valve block, be for better control gap 8 size to adjust the pressure release and let out 5 sizes in oil passageway, thereby can effectively avoid because of 8 intervals undersize in gap, and can't take place the phenomenon of leaking the sudden increase oil pressure and removing. The phenomenon that the leakage quantity of the oil pump in the normal operation state is overlarge due to the overlarge gap 8 can be avoided.

Preferably, the pressure relief valve plate is provided with a groove 6 for plugging the oil drainage hole 4, two ends of the groove 6 are provided with bulges 7 matched with the shape and the size of the reducing opening, and a gap 8 is formed between the bulges 7 and the reducing opening.

In this embodiment, carry out above-mentioned setting to plugging device 2, be to avoid too inseparable and unable separation of pressure release valve block and 4 laminating of draining hole, can influence going on smoothly of pressure release draining operation like this. Moreover, the area of the leakage channel can be effectively increased by the arrangement, and the sudden oil pressure can be better and more quickly drained under the condition that the maximum working pressure is not increased.

Preferably, the gap 8 between the pressure relief valve plate and the pressure relief valve seat 1 is 0.1mm to 0.2 mm.

It should be noted that, under the low-pressure oil pump normal operating condition, its operating pressure is less, consequently, under the prerequisite that the pressure release valve block can reset under resilient means 3 effect, gap 8 between pressure release valve block and the pressure release disk seat 1 is controlled at 0.1mm to 0.2mm, can effectively guarantee the oil pump normal during operation, the oil liquid that leaks from gap 8 is less, because operating pressure is little and can't push away the pressure release valve block, so the fluid of leakage can only flow around gap 8, can satisfy the low pressure high flow demand of oil pump like this. And take place the shutoff phenomenon and lead to internal pressure to increase suddenly in the oil pump, when pressure was greater than the 3 extrusion forces of resilient means, the diaphragm can be left draining hole 4 by the jack-up, and the diaphragm by the in-process of jack-up, the area of pressure release draining passageway 5 increases in the twinkling of an eye, can discharge the inside sudden increase oil pressure of oil pump immediately.

Of course, the material, shape, structure, size of the gap 8, and the like of the occluding device 2 may be determined in an actual operation process according to actual conditions and actual requirements.

On the basis of the above pressure relief valve device, preferably, the elastic device 3 is a cylindrical spring, one end of the spring in the elastic direction is connected with the blocking device 2, the other end of the spring is connected with the pressure relief valve seat 1, and the spring is in a compressed state in an initial state, so that the blocking device 2 compresses the oil drainage hole 4.

Preferably, the spring is a tower spring with a centering effect to improve the resetting effect of the plugging device 2.

The tower-shaped spring is a shock-absorbing spring, has the advantages of small volume, large load, variable stiffness and the like, and is widely applied to occasions with small space and large load and shock-absorbing devices.

Therefore, when the plugging device 2 is pushed open by the sudden increase oil pressure, the pressure relief valve device can quickly perform pressure relief and oil drainage operations, and when the sudden increase oil pressure is relieved, the plugging device 2 can be extruded at the oil drainage hole 4 well under the action of the tower-shaped spring, so that the oil pump is prevented from generating large oil drainage amount under the normal working state. Because the spring that this device adopted is the turriform spring, it has better centering effect, can be fine with 2 tops of plugging device return to initial position and do not take place the dislocation phenomenon to can solve the difficult problem that plugging device 2 resets.

In addition, because the relief valve device requires highly to the pressure release, must guarantee to have great pressure release draining channel 5 area, and great pressure release draining channel 5 area must be accompanied with the increase of 8 sizes in gap, for 8 size in the better control gap, set up resilient means 3 into the turriform spring, can effectively balance the 8 sizes in gap between plugging device 2 and convergent opening and plugging device 2 and the draining hole 4, with better control pressure release draining flow.

The material, structure, shape, size, position, etc. of the elastic device 3 can be determined according to actual conditions and actual requirements in the actual application process.

The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The utility model provides an arbitrary compound mode of all embodiments all is in this utility model's a protection scope, does not do here and gives unnecessary details.

It is right above that the utility model provides a relief valve device has carried out the detailed introduction. The principles and embodiments of the present invention have been explained herein using specific examples, and the above descriptions of the embodiments are only used to help understand the method and its core ideas of the present invention. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the protection scope of the appended claims.

Claims

1. A pressure relief valve apparatus, comprising: the oil drainage device comprises a pressure relief valve seat (1) arranged between a pump assembly (9) and an oil inlet cover assembly (10), a blocking device (2) used for blocking an oil drainage hole (4) of the pressure relief valve seat (1), and an elastic device (3) used for extruding the blocking device (2) on the oil drainage hole (4), wherein the elastic device (3) is connected with the blocking device (2), the pressure relief valve seat (1) is axially provided with the oil drainage hole (4) communicated with an oil port of the pump assembly (9), the pressure relief valve seat (1) is provided with a cavity used for accommodating the blocking device (2) and the elastic device (3), the cavity is provided with a gradually-reduced port at one end communicated with the oil drainage hole (4), the blocking device (2) is tightly attached to the oil drainage hole (4) to effectively block the oil drainage hole (4), and the blocking device (2) is matched with the gradually-reduced port, so as to form a gap (8) for oil drainage and pressure relief, the pressure relief valve seat (1) is radially provided with an oil drainage channel (5) communicated with an oil inlet of the oil inlet cover component (10), and the oil drainage channel (5) is communicated with the gradually-reduced port.

2. A pressure relief valve arrangement according to claim 1, characterized in that the blocking device (2) is a pressure relief valve plate.

3. The pressure relief valve device according to claim 2, characterized in that the pressure relief valve plate is provided with a groove (6) for blocking the oil drainage hole (4), two ends of the groove (6) are provided with protrusions (7) matched with the shape and size of the tapered opening, and the gap (8) is formed between the protrusions (7) and the tapered opening.

4. A pressure relief valve arrangement according to claim 3, characterized in that the gap (8) between the pressure relief valve plate and the pressure relief valve seat (1) is 0.1mm to 0.2 mm.

5. A pressure relief valve device according to claim 1, characterized in that the elastic means (3) is a cylindrical spring, one end of the spring in the elastic direction is connected with the blocking means (2), the other end is connected with the pressure relief valve seat (1), and the initial state of the spring is a compressed state, so that the blocking means (2) compresses the oil relief hole (4).

6. A pressure relief valve device according to claim 5, characterized in that the spring is a tower spring with a centering effect to improve the resetting effect of the plugging device (2).