CN215258023U

CN215258023U - Precision pressure relief small valve

Info

Publication number: CN215258023U
Application number: CN202120649204.3U
Authority: CN
Inventors: 周志伟; 何炜
Original assignee: Anji Fujikura Rubber Co ltd
Current assignee: Anji Fujikura Rubber Co ltd
Priority date: 2021-03-30
Filing date: 2021-03-30
Publication date: 2021-12-21
Anticipated expiration: 2031-03-30

Abstract

The utility model discloses a precision pressure relief small valve, relating to the technical field of valves and comprising a valve body, a valve cover, an end cover, a valve rod, a valve clack and a first spring; an inlet is formed in one side of the valve body, an outlet is formed in the other side of the valve body, an opening is formed in the top of the valve body, and a first cavity, a second cavity and a third cavity are sequentially formed in the valve body from the inlet to the outlet; the valve cover is positioned at the opening of the valve body, a plurality of first grooves with different starting points are uniformly distributed on the inner wall of the valve cover along the circumference, and the first grooves extend from the end close to the end cover to the end far away from the end cover; the end cover is positioned at one end of the valve cover far away from the valve body, one end of the end cover extends into the valve cover, the control rod penetrates through the center of the end cover, and the valve clack is positioned at the communication position of the first cavity and the second cavity; the one end that the control lever is close to the end cover stretches into the end is equipped with the shaft shoulder, and the shaft shoulder has a plurality of second recesses along the circumference equipartition, all is equipped with first stop device in every second recess. The technical effect of the utility model lies in that it sets for the pressure value scope great for the precision of relief valve is higher.

Description

Precision pressure relief small valve

Technical Field

The utility model relates to the technical field of valves, concretely relates to small-size valve of precision level pressure release.

Background

The pressure relief valve is also called a safety valve, can be automatically opened and closed according to the working pressure of the system, and is generally arranged on equipment or a pipeline of a closed system to protect the safety of the system. When the pressure in the equipment or the pipeline exceeds the set pressure of the pressure release valve, the pressure release valve is automatically opened, the medium pressure in the equipment or the pipeline is ensured to be below the set pressure, the equipment and the pipeline are protected, and accidents are prevented.

However, the range of the set pressure value of the relevant relief valve is small, resulting in low accuracy of the relief valve.

SUMMERY OF THE UTILITY MODEL

1. Technical problem to be solved by the utility model

Less to the relief valve set pressure value scope, the lower technical problem of precision that leads to the relief valve, the utility model provides a small-size valve of precision level pressure release, it set pressure value scope is great for the precision of relief valve is higher.

2. Technical scheme

In order to solve the above problem, the utility model provides a technical scheme does:

a precision-level pressure relief small valve comprises a valve body, a valve cover, an end cover, a valve rod, a valve clack and a first spring;

an inlet is formed in one side of the valve body, an outlet is formed in the other side of the valve body, an opening is formed in the top of the valve body, and a first cavity, a second cavity and a third cavity are sequentially formed in the valve body from the inlet to the outlet;

the valve cover is positioned at the opening of the valve body and detachably connected with the valve body, a plurality of first grooves with different starting points are uniformly distributed on the inner wall of the valve cover along the circumference, and the first grooves extend from the end close to the end cover to the end far away from the end cover;

the end cover is positioned at one end, far away from the valve body, of the valve cover, the end cover is detachably connected with the valve cover, one end of the end cover extends into the valve cover, a control rod penetrates through the center of the end cover, one end, close to the extending end of the end cover, of the control rod is fixedly connected with one end of the first spring, the other end of the first spring is fixedly connected with one end of the valve rod, the other end of the valve rod is fixedly connected with the valve clack, and the valve clack is positioned at a communication position of the first cavity and the second cavity;

a shaft shoulder is arranged at one end, close to the extending end of the end cover, of the control rod, a plurality of second grooves are uniformly distributed on the shaft shoulder along the circumference, and a first limiting device is arranged in each second groove;

one side of the first spring is provided with a pressure sensor, the end cover is provided with a pressure gauge, and the pressure sensor is electrically connected with the pressure gauge.

Optionally, the first limiting device comprises a second spring, a first limiting rod, a third spring and a second limiting rod, one end of the second spring is connected with the bottom of the first groove, the other end of the second spring is connected with the first limiting rod, a third groove is formed in the first limiting rod, one end of the third spring is connected with the bottom of the third groove, the other end of the third spring is connected with the second limiting rod, and a plurality of grooves matched with the second limiting rod are evenly distributed in the shaft shoulder along the circumference.

Optionally, a second limiting device is further arranged in the valve body, a through hole is formed in the center of the second limiting device, the valve rod is located in the through hole, and the valve rod is connected with the second limiting device in a sliding fit mode.

Optionally, the control rod and the end cap are connected by a thread.

Optionally, a sealing ring is arranged at the joint of the valve flap and the valve rod.

Optionally, the sealing ring is made of fluororubber or nitrile rubber.

Optionally, the valve flap is made of fluororubber.

Optionally, the valve cover and the valve body are connected through bolts, and the end cover and the valve cover are connected through bolts.

Optionally, the valve body, the valve cover and the end cover are all made of cast iron or cast steel.

3. Advantageous effects

Adopt the technical scheme provided by the utility model, compare with prior art, have following beneficial effect: the set pressure value range is large, so that the accuracy of the pressure release valve is high.

Drawings

Fig. 1 is a schematic structural view of a precision-level pressure relief small-sized valve according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a valve cover according to an embodiment of the present invention;

fig. 3 is a cross-sectional view of a top view of a shoulder according to an embodiment of the present invention;

fig. 4 is a cross-sectional view of a front view of a shoulder according to an embodiment of the present invention.

In the figure: 1. a valve body; 101. an inlet; 102. an outlet; 103. a first cavity; 104. a second cavity; 105. a third cavity; 2. a valve cover; 21. a first groove; 3. an end cap; 4. a valve stem; 5. a valve flap; 6. a first spring; 7. a control lever; 8. a shaft shoulder; 81. a second groove; 82. a fourth groove; 9. a first limiting device; 91. a second spring; 92. a first limit rod; 93. a third groove; 94. a third spring; 95. a second limiting rod; 10. a pressure sensor; 11. and a pressure gauge.

Detailed Description

For a further understanding of the present invention, reference will be made to the following detailed description taken in conjunction with the accompanying drawings and examples.

The present application will be described in further detail with reference to the following drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant invention and are not limiting of the invention. It should be noted that, for convenience of description, only the portions related to the present invention are shown in the drawings. The utility model discloses in words such as first, second, be for the description the utility model discloses a technical scheme is convenient and set up, and does not have specific limiting action, is general finger, right the technical scheme of the utility model does not constitute limiting action. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art. The technical solutions in the same embodiment and between the technical solutions in different embodiments can be arranged and combined to form a new technical solution without contradiction or conflict, which is all within the scope of the present invention.

Example 1

With reference to the attached drawings 1-4, the utility model provides a small valve with precise pressure relief, which comprises a valve body 1, a valve cover 2, an end cover 3, a valve rod 4, a valve clack 5 and a first spring 6;

an inlet 101 is formed in one side of the valve body 1, an outlet 102 is formed in the other side of the valve body 1, an opening is formed in the top of the valve body 1, and a first cavity 103, a second cavity 104 and a third cavity 105 are sequentially formed in the valve body 1 from the inlet 101 to the outlet 102;

the valve cover 2 is positioned at the opening of the valve body 1, the valve cover 2 is detachably connected with the valve body 1, a plurality of first grooves 21 with different starting points are uniformly distributed on the inner wall of the valve cover 2 along the circumference, and the first grooves 21 extend from the end close to the end cover 3 to the end far away from the end cover 3;

the end cover 3 is positioned at one end of the valve cover 2 far away from the valve body 1, the end cover 3 is detachably connected with the valve cover 2, one end of the end cover 3 extends into the valve cover 2, a control rod 7 penetrates through the center of the end cover 3, one end, close to the extending end of the end cover 3, of the control rod 7 is fixedly connected with one end of a first spring 6, the other end of the first spring 6 is fixedly connected with one end of a valve rod 4, the other end of the valve rod 4 is fixedly connected with a valve clack 5, and the valve clack 5 is positioned at a communication position of a first cavity 103 and a second cavity 104;

a shaft shoulder 8 is arranged at one end of the control rod 7 close to the extending end of the end cover 3, a plurality of second grooves 81 are uniformly distributed on the shaft shoulder 8 along the circumference, and a first limiting device 9 is arranged in each second groove 81;

one side of the first spring 6 is provided with a pressure sensor 10, the end cover 3 is provided with a pressure gauge 11, and the pressure sensor 10 is electrically connected with the pressure gauge 11.

Specifically, at first set pressure value, with first stop device 9 on the shaft shoulder 8 of control lever 7, cooperate with the inside first recess 21 that corresponds of valve gap 2, stretch into valve gap 2's length through adjusting control lever 7, make the first recess 21 cooperation of first stop device 9 and different starting points, change the compression volume of first spring 6, and use pressure sensor 10 to measure corresponding pressure, and show on manometer 11, because be equipped with the different first recess 21 of a plurality of starting points on the 2 inner walls of valve gap, then can make the spring keep different initial compression volume, set for a plurality of pressure values promptly, improve the settlement scope of pressure value, thereby improve the precision.

Then, during normal operation, a medium flows into the pressure relief valve from the inlet 101 of the valve body 1 and enters the first cavity 103, the medium stays in the first cavity 103 under the action of the valve flap 5, along with the continuous increase of the medium pressure, when the medium pressure exceeds a set pressure value, the valve flap 5 moves towards the valve cover 2 and drives the valve rod 4 to move, and further compresses the first spring 6, so that the medium sequentially passes through the second cavity 104 and the third cavity 105, and finally flows out of the pressure relief valve through the outlet 102 of the valve body 1, and due to the existence of the first limiting device 9, the control rod 7 does not ascend or descend.

When the medium pressure is smaller than the set pressure value, the first spring 6 begins to extend to drive the valve rod 4 and the valve clack 5 to move towards the direction away from the valve cover 2, and finally the valve clack 5 is located at the communication position of the first cavity 103 and the second cavity 104, so that the medium flowing into the pressure release valve can only stay in the first cavity 103.

Specifically, first stop device 9 includes second spring 91, first gag lever post 92, third spring 94 and second gag lever post 95, second spring 91 one end and 21 bottom connections of first recess, the second spring 91 other end and first gag lever post 92 are connected, be equipped with third recess 93 on the first gag lever post 92, third spring 94 one end and third recess 93 bottom connection, the third spring 94 other end and second gag lever post 95 are connected, still follow the circumference equipartition in the shaft shoulder 8 and have a plurality ofly and second gag lever post 95 complex fourth recess 82. The initial state is that second gag lever post 95 and fourth recess 82 cooperate, when needs use first stop device 9, at first to being close to 8 directions of shaft shoulder and pressing first gag lever post 92 for the compression of third spring 94, at this moment, second gag lever post 95 removes to third recess 93, after second gag lever post 95 is located third recess 93 inside completely, put aside after rotating certain angle first gag lever post 92, under the effect of second spring 91, first gag lever post 92 extension to cooperate with corresponding first recess 21.

Specifically, still be equipped with second stop device in the valve body 1, second stop device center is equipped with the through-hole, and valve rod 4 is located the through-hole, and valve rod 4 and second stop device sliding fit are connected. When valve rod 4 along axial displacement, valve rod 4 all the time with second stop device's through-hole sliding fit, when preventing valve rod 4 along axial displacement, take place radial shake simultaneously to improve the stationarity that valve rod 4 removed.

Specifically, the control rod 7 and the end cap 3 are connected by screw threads. When the pressure value is set, the control rod 7 is rotated, so that the first limiting device 9 is matched with the first groove 21, the thread fit is adopted, and the rotation precision and the rotation stability of the control rod 7 are improved.

Specifically, the valve clack 5 and the valve rod 4 junction are equipped with the sealing washer, prevent that the medium from flowing into the junction of valve clack 5 and valve rod 4, constantly erode for valve clack 5 drops from valve rod 4, leads to the relief valve inefficacy.

Specifically, the sealing ring is made of fluororubber or nitrile rubber. Wherein, the fluororubber has high temperature resistance and stable chemical property; the nitrile rubber has good oil resistance and wear resistance.

Specifically, the valve flap 5 is made of fluororubber, and during actual production, the valve flap 5 is manufactured by vulcanizing high-temperature-resistant fluororubber and then is high in precision and high in sealing.

Specifically, the valve cover 2 and the valve body 1 are connected through bolts, the end cover 3 and the valve cover 2 are connected through bolts, and in order to facilitate disassembly, the end cover 3 and the valve cover 2 are conveniently opened to adjust the first limiting device 9 to be matched with the first groove 21; in order to ensure the installation reliability and prevent the end cover 3 and the valve cover 2 from being separated or the valve cover 2 and the valve body 1 from being separated when the pressure relief valve is used.

Specifically, the valve body 1, the valve cover 2 and the end cover 3 are all made of cast iron or cast steel. Wherein, the cast iron has wear resistance, high vibration absorption and excellent cutting processing performance; the cast steel has good plasticity and toughness.

The present invention and its embodiments have been described above schematically, and the description is not limited thereto, and what is shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. Therefore, if the person skilled in the art receives the teaching of the present invention, without departing from the inventive spirit of the present invention, the person skilled in the art should also design the similar structural modes and embodiments without creativity to the technical solution, and all shall fall within the protection scope of the present invention.

Claims

1. A precision-level pressure relief small valve is characterized by comprising a valve body, a valve cover, an end cover, a valve rod, a valve clack and a first spring;

2. The small-sized precision pressure relief valve according to claim 1, wherein the first limiting device comprises a second spring, a first limiting rod, a third spring and a second limiting rod, one end of the second spring is connected with the bottom of the first groove, the other end of the second spring is connected with the first limiting rod, a third groove is formed in the first limiting rod, one end of the third spring is connected with the bottom of the third groove, the other end of the third spring is connected with the second limiting rod, and a plurality of fourth grooves matched with the second limiting rod are evenly distributed in the shaft shoulder along the circumference.

3. The small-sized precision pressure relief valve according to claim 1, wherein a second limiting device is further arranged in the valve body, a through hole is formed in the center of the second limiting device, the valve rod is located in the through hole, and the valve rod is connected with the second limiting device in a sliding fit manner.

4. A precision stage pressure relief minivalve according to claim 1 wherein said control rod and said end cap are threaded.

5. The small size precision pressure relief valve as recited in claim 1 wherein a seal is provided at the junction of said flap and said stem.

6. The small size valve with precise pressure relief according to claim 5, wherein the sealing ring is made of fluororubber or nitrile rubber.

7. The small size precision pressure relief valve as recited in claim 1 wherein said flap is made of viton.

8. The small size precision stage pressure relief valve according to claim 1, wherein the connection between said valve cover and said valve body is a bolt connection, and the connection between said end cover and said valve cover is a bolt connection.

9. The small size precision pressure relief valve as recited in claim 1 wherein the valve body, valve cover and end cap are made of cast iron or cast steel.