CN209743692U

CN209743692U - Overflow valve

Info

Publication number: CN209743692U
Application number: CN201920565714.5U
Authority: CN
Inventors: 吴晓亮
Original assignee: Robert Bosch GmbH
Current assignee: Robert Bosch GmbH
Priority date: 2019-04-24
Filing date: 2019-04-24
Publication date: 2019-12-06
Anticipated expiration: 2029-04-24

Abstract

The application provides an overflow valve sets up in the intracavity of acceping of casing, the overflow valve includes valve body, leaf spring and disk seat, the valve body with the casing rigid coupling will the leaf spring support press in on the disk seat, the valve body has the discharge port, the leaf spring includes outer lane and closing body, the closing body pass through the elastic beam with the outer lane is connected, the influent stream mouth has in the disk seat, the closing body is at the disconnection of normal state the influent stream mouth with be connected between the discharge port. The overflow valve can solve the problem that an overflow valve in the prior art is complex in structure.

Description

Overflow valve

Technical Field

The present application relates to a fluid pressure control device, and more particularly, to a relief valve having a compact structure.

background

In the field of fluid control, relief valves are often used to control pressure in a fluid passageway. When the pressure in the fluid passage is low, the relief valve closes. When the pressure in the fluid passage is high, the relief valve opens, thereby partially relieving the fluid in the fluid passage, thereby reducing the fluid pressure in the fluid passage to a desired level to protect the pressure device and control the flow rate.

Relief valves, in particular those used in the field of high-pressure pumps, generally adopt a structure as shown in fig. 1 and 2, and comprise a separate housing 9, a passage 90 is provided in the housing 9, and the passage 90 is divided into three continuous passages, a piston chamber 91, a spring chamber 92 and a seal chamber 93. The diameter increases continuously from the piston chamber 91 to the spring chamber 92 and the seal chamber 93. A piston 81 is disposed in the piston chamber 91 for reciprocating movement along the piston chamber, a spring 82 is disposed in the spring chamber 92, and a sealing ball 83 is disposed in the sealing chamber 93. One end of the spring 82 is pressed against the sealing ball 83, and the other end is pressed against the piston 81, and the spring 82 has a pre-tightening pressure. The middle of the piston chamber 91 is connected with a pressure relief channel 910, and when the pressure at the lower part of the oil channel 90 is higher than the pressure of the spring 82, the piston 81 moves upwards. When the oil pressure reaches the set value, the lower edge of the piston 81 moves to communicate with the pressure relief passage 910, and the high-pressure oil flows out from the pressure relief passage 910, so that the pressure in the passage 90 returns to the normal value.

The overflow valve in the prior art can effectively achieve the overflow effect, however, the structure is complex, and the occupied space is large. It is desirable to provide a relief valve which is simple in structure and occupies a small space.

SUMMERY OF THE UTILITY MODEL

the utility model aims to provide a simple structure shared space is less overflow valve.

the application provides an overflow valve sets up in the intracavity of acceping of casing, the overflow valve includes valve body, leaf spring and disk seat, the valve body with the casing rigid coupling will the leaf spring support press in on the disk seat, the valve body has the discharge port, the leaf spring includes outer lane and closing body, the closing body pass through the elastic beam with the outer lane is connected, the influent stream mouth has in the disk seat, the closing body is at the disconnection of normal state the influent stream mouth with be connected between the discharge port.

The present application also features the bleed port being connected to the bleed passage of the housing.

This application still has following characteristic, the valve body has the inner chamber, leaf spring set up in the inner chamber, the valve seat part extends into in the inner chamber.

The present application also features the valve seat peripheral edge projecting toward the leaf spring to form a pressing step.

The present application also has the following feature that the pressing step presses against the outer ring.

The present application also features a gap between the closing body and the outer race.

The present application also features the closing body being a hemisphere projecting in the direction of the inlet.

The application also features the valve seat having a socket that is in structural engagement with the closure body, the closure body forming a seal with the socket, the spring beam being inclined toward the valve seat.

The present application also features the valve seat being integrally formed with the housing.

The present application further has a feature that the valve body is connected to the accommodating chamber through a screw, and the plate spring is a disc spring.

The overflow valve of this application simple structure, the volume is less.

Drawings

Exemplary embodiments of the present application will be described in detail below with reference to the attached drawings, it being understood that the following description of the embodiments is only for the purpose of explanation and not limitation of the scope of the present application, and wherein:

FIG. 1 is a block diagram of a prior art relief valve in a first state;

FIG. 2 is a block diagram of the relief valve of FIG. 1 in a second condition;

FIG. 3 is a schematic illustration of the construction of an embodiment of the relief valve of the present application with the housing portion only partially shown;

Fig. 4 is a perspective view of an embodiment of a leaf spring of the relief valve of the present application.

Detailed Description

In different drawings, the same or similar components are denoted by the same reference numerals.

It should be understood that the drawings are for purposes of illustration only and that the dimensions, proportions and number of parts are not to be construed as limiting the application.

Fig. 3 is a diagram showing an embodiment of a relief valve 10 according to the present application. The overflow valve 10 is integrated in a high-pressure pump. A high pressure pump of the type shown in one embodiment of the present application is shown only partially and includes a housing 20 and a receiving chamber 21 disposed within the housing 20, the housing 20 also having a drain passage 22 therein.

Referring to fig. 3, the relief valve of the present application includes a valve body 11, a leaf spring 12 and a valve seat 13, wherein the valve body 11 is fixedly connected to the housing 20 through a thread, and the leaf spring 12 is pressed against the valve seat 13. The sheet spring 12 mentioned in the present application mainly includes a spring in which a main body such as a disc spring is in a sheet shape, and an elastic force is mainly provided by elastic deformation of the sheet in a direction perpendicular to a plane in which the sheet is present. A drain port 111 is provided in the valve body 11, and the drain port 111 is in fluid communication with a drain passage 22 in the housing. The valve body 11 has an inner cavity 113 at one end thereof disposed within the housing 20, the leaf spring 12 is disposed within the inner cavity 113, and the valve seat 13 extends partially into the inner cavity 113. In this embodiment, the outer diameter of the leaf spring 12 is the same as the inner diameter of the inner cavity 113, or slightly smaller than the inner diameter of the inner cavity 113.

Referring to fig. 3 and 4, the leaf spring 12 includes an outer ring 121, and the outer ring 121 is substantially circular. A resilient beam 123 extends from the outer race 121 and forms a closure 122 at its end. There is a gap 124 between the closing body 122 and the outer ring 121. The closing body 122 has a hemispherical shape protruding to one side. When mounted, the hemispherical shape protrudes toward the valve seat 13, and the elastic beam 123 is also inclined toward the valve seat 13.

With continued reference to FIG. 3, the valve seat 13 has an inlet 130, and the inlet 130 is in communication with the inlet passage 23 in the housing 20. The valve seat 13 may be provided separately or may be formed integrally with the housing 20. The valve seat 13 has a pressing step 131 with an outer diameter the same as or slightly smaller than the inner diameter of the inner cavity 113, and the pressing step 131 extends into the inner cavity 113 and presses against the outer ring 121, so that the leaf spring 12 is firmly pressed between the valve body 11 and the valve seat 13. The valve seat 13 has a receiving seat, which is shaped to fit the closing body 122, and is a hemisphere in this embodiment. When the leaf spring 12 is firmly pressed between the valve body 11 and the valve seat 13, the closing body 122 is disposed on the seat to form a sealing surface, and the connection between the inlet 130 and the outlet 111 is disconnected in a normal state, i.e., a state where no liquid is injected and a state where the liquid pressure is insufficient to push the closing body 122 and the seat open. Since the elastic beam 123 is inclined toward the valve seat 13, the closing body 122 has an elastic force when it is set on the socket. Of course, in other embodiments, the elastic force can be achieved in other ways, such as by the positional relationship between the socket and the closing body, such that the socket pushes the closing body toward the valve body, and the elastic beam is partially deformed.

in operation, fluid enters the inlet 130 of the valve seat 13 from the inlet passage 23. The fluid pressure pushes the closing member 122, but the pressure is smaller than the elastic force of the elastic beam 123, and the closing member 122 and the socket maintain a seal. When the fluid pressure increases to a pressure greater than that provided by the resilient beam 123, the closing body 122 is released from contact with the seat, the relief valve 10 opens, and fluid flows from the inlet 130 into the relief port 111 and finally out through the relief passage 22 of the housing 20. After the fluid portion is discharged, the fluid in the housing 20 decreases, and when the fluid pressure decreases to be less than the elastic force of the elastic beam 123, the elastic beam 123 is seated on the receiving seat, and the inlet 130 and the outlet 111 are closed.

The overflow valve 10 has the advantages of simple structure and small volume.

The present application has been described in connection with only the presently preferred embodiments with the understanding that the present disclosure is not to be considered as limiting, and the present application is not limited to the examples described above, but rather, it is to be understood that changes, modifications, additions or substitutions that are within the spirit and scope of the application by one of ordinary skill in the art are included.

Claims

1. An overflow valve (10) is arranged in a containing cavity (21) of a shell (20), and is characterized in that the overflow valve (10) comprises a valve body (11), a leaf spring (12) and a valve seat (13), the valve body (11) is fixedly connected with the shell (20) and presses the leaf spring (12) against the valve seat (13), the valve body (11) is provided with a discharge port (111), the leaf spring (12) comprises an outer ring (121) and a closing body (122), the closing body (122) is connected with the outer ring (121) through an elastic beam (123), a flow inlet (130) is arranged in the valve seat (13), and the closing body (122) is disconnected between the flow inlet (130) and the discharge port (111) under a normal state.

2. The excess flow valve (10) of claim 1 wherein the relief port (111) is connected to a relief passage (22) of the housing (20).

3. The excess flow valve (10) of claim 1 wherein the valve body (11) has an internal cavity (113), the leaf spring (12) being disposed within the internal cavity (113), the valve seat (13) extending partially into the internal cavity (113).

4. The excess flow valve (10) of claim 3 wherein the peripheral edge of the valve seat (13) projects toward the leaf spring (12) to form a pressing step (131).

5. The relief valve (10) according to claim 4, wherein the pressing step (131) presses against the outer ring (121).

6. The excess flow valve (10) of claim 1 wherein the closure (122) has a clearance (124) with the outer ring (121).

7. The excess flow valve (10) of claim 6 wherein the closure (122) is a hemisphere that projects in the direction of the inlet (130).

8. Overflow valve (10) according to claim 6, characterised in that said valve seat (13) has a seat for structural engagement with said closing body (122), said closing body (122) forming a seal with said seat, said resilient beam being inclined towards said valve seat (13).

9. Overflow valve (10) according to anyone of claims 1 to 8 characterized in that said valve seat (13) is integrally formed to said housing (20).

10. The excess flow valve (10) according to any one of claims 1 to 8, characterized in that the valve body (11) is screwed into the receiving chamber (21), and the leaf spring is a disc spring.