CN216479222U - Pilot pressure relief control valve - Google Patents

Abstract

A pilot pressure relief control valve comprises a valve body, a driving mechanism and a valve core assembly, wherein the driving mechanism is installed outside an installation cavity, the valve core assembly is installed in the installation cavity, an air inlet end, an installation cavity and an air outlet end are formed on the valve body, and the air inlet end, the installation cavity and the air outlet end are sequentially communicated to form a fluid pipeline; the valve element assembly comprises a reversing mechanism, a first cover body and a second cover body, wherein a pressure relief hole is formed in the first cover body, the second cover body is sealed in the pressure relief hole, and the driving mechanism is in transmission connection with the first cover body and the second cover body through the reversing mechanism; the reversing mechanism comprises a reversing support, a transmission assembly and a swing arm assembly, the transmission assembly is mounted on the inner wall of the mounting cavity through the reversing support, the first cover body and the second cover body are movably connected with the swing arm assembly, and the swing arm assembly is in transmission connection with the driving mechanism through the transmission assembly.

Description

Pilot pressure relief control valve

Technical Field

The utility model relates to a metering control technical field especially relates to a guide's pressure relief control valve.

Background

With the continuous development of social economy, various industries are also continuously improved, and in the aspect of flow controllers, the control valve is widely applied, so that people can conveniently manage and control the flow, and the efficiency is improved.

However, since the cover body on the valve core assembly is directly in transmission connection with the driving mechanism, especially when the pressure in the installation cavity is too high, the driving mechanism cannot drive the cover body to be directly opened, or the driving mechanism with larger torque is required to drive, so that the service life loss of the valve core assembly is accelerated, and the failure that the valve core assembly cannot be opened is easily caused.

SUMMERY OF THE UTILITY MODEL

The utility model provides a guide's pressure relief control valve can open first lid and second lid successively through swing arm subassembly, avoids leading to the unable scheduling problem of opening of case subassembly to take place because of the too big pressure of installation intracavity.

The utility model provides a guide's pressure relief control valve, include:

the valve body is provided with an air inlet end, an installation cavity and an air outlet end, and the air inlet end, the installation cavity and the air outlet end are sequentially communicated to form a fluid pipeline;

the valve core assembly comprises a reversing mechanism, a first cover body and a second cover body, a pressure relief hole is formed in the first cover body, the second cover body is sealed in the pressure relief hole, and the driving mechanism is in transmission connection with the first cover body and the second cover body through the reversing mechanism;

the reversing mechanism comprises a reversing support, a transmission assembly and a swing arm assembly, the transmission assembly is mounted on the inner wall of the mounting cavity through the reversing support, the first cover body and the second cover body are movably connected with the swing arm assembly, and the swing arm assembly is in transmission connection with the driving mechanism through the transmission assembly, so that the driving mechanism can control the second cover body to open the pressure relief hole firstly, and then control the first cover body to open the fluid pipeline.

In the control valve according to an embodiment of the present invention, the swing arm assembly includes a first swing arm and a second swing arm, the second swing arm is movably connected to a first connecting member and a second connecting member, the first cover is connected to the first connecting member, the second cover is connected to the second connecting member, and the second swing arm is in transmission connection with the transmission assembly through the first swing arm;

the movable distance of the second swing arm relative to the first connecting piece is larger than that of the second swing arm relative to the second connecting piece. The utility model discloses an in the control valve of embodiment, the drive assembly includes first gear and the second gear of being connected with first gear drive, first gear is installed on actuating mechanism's the output shaft, first swing arm with the transmission shaft on the second gear is connected, makes actuating mechanism can pass through first gear drives with the cooperation of second gear first swing arm swing.

The utility model discloses an among the control valve of embodiment, the swing arm subassembly still includes first elastic component, be equipped with spacing arch on the second swing arm, first swing arm passes through spacing arch drives the swing of second swing arm, first elastic component sets up between first swing arm and the second swing arm.

In an embodiment of the present invention, the transmission assembly further includes a third gear, and the second gear passes through the third gear and the first gear are connected in a transmission manner.

The utility model discloses an in the control valve of embodiment, the drive assembly includes first gear, second gear and the actuating lever of being connected with the second gear, the swing arm subassembly with the second gear drive is connected, the second gear passes through first gear with the actuating mechanism transmission is connected, makes actuating mechanism can pass through the actuating lever drives earlier the second lid is opened the pressure release hole, reaches actuating mechanism passes through the second gear drives again first lid is opened the fluid pipeline.

The utility model discloses an among the control valve of embodiment, drive assembly includes first pivot, be equipped with first track groove on the first pivot, the one end of actuating lever with drive division butt on the second gear, the other end swing joint of actuating lever is in the first track groove.

The utility model discloses an in the control valve of embodiment, drive assembly still includes third gear and driving medium, be equipped with the locating part on the third gear, be equipped with the spacing groove on the driving medium, driving medium and third gear are all installed in the first pivot, make the third gear can drive under the cooperation of locating part and spacing groove the second gear rotates.

The utility model discloses an in the control valve of embodiment, the swing arm subassembly still includes the second elastic component, the one end of second elastic component is established on the switching-over support, the other end of second elastic component with the actuating lever butt.

In an embodiment of the present invention, the third gear and the second gear are both provided with a gear having a 45 degree oblique angle.

The technical scheme provided by the embodiment of the application can have the following beneficial effects: the application designs a control valve, including valve body, case subassembly and actuating mechanism, be formed with inlet end, installation cavity on the valve body and give vent to anger the end, inlet end, installation cavity and the end of giving vent to anger communicate in proper order and form the fluid pipeline, and the case unit mount is in the fluid pipeline for actuating mechanism can drive the case subassembly and open or close the fluid pipeline. The valve core assembly comprises a reversing mechanism, a first cover body and a second cover body, the driving mechanism can control the second cover body to open the pressure relief hole through the reversing mechanism, then control the first cover body to open the fluid pipeline, and the problem that the valve core assembly cannot be opened due to overlarge pressure in the installation cavity is avoided.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without any creative effort.

FIG. 1 is a schematic diagram of a control valve according to an embodiment of the present disclosure;

FIG. 2 is a schematic cross-sectional view of the control valve of FIG. 1;

FIG. 3 is an exploded schematic view of the control valve of FIG. 1;

FIG. 4 is a cross-sectional schematic view of the valve body of FIG. 1;

FIG. 5 is a schematic structural view of the valve core assembly and drive mechanism of FIG. 3;

FIG. 6 is a schematic structural view of the valve core assembly of FIG. 5;

FIG. 7 is an exploded schematic view of the valve cartridge assembly of FIG. 6;

FIG. 8 is a schematic structural view of the transmission assembly of FIG. 7;

FIG. 9 is an exploded view of the second swing arm and cover assembly of FIG. 7;

FIG. 10 is another structural schematic of the valve core assembly of FIG. 1;

FIG. 11 is an exploded schematic view of the valve cartridge assembly of FIG. 10;

fig. 12 is a partially exploded schematic view of the reversing mechanism of fig. 10.

Description of reference numerals:

100. a valve core assembly;

10. a reversing mechanism; 11. a transmission assembly; 111. a first gear; 112. a second gear; 1121. a drive shaft; 113. a third gear; 1131. a first tooth portion; 1132. a second tooth portion; 114. a drive rod; 115. a first rotating shaft; 1151. a first track groove; 116. a transmission member; 117. a second elastic member; 12. a swing arm assembly; 121. a first swing arm; 122. a second swing arm; 1221. a first connecting member; 1222. a second connecting member; 123. a first elastic member; 13. a reversing bracket;

20. a cover assembly; 21. a first cover body; 22. a second cover body; 211. a pressure relief vent;

200. a valve body; 201. an air inlet end; 202. an air outlet end; 203. a mounting cavity; 204. a drive mechanism mounting portion.

300. A drive mechanism;

400. a seal assembly; 401. a first sealing cover; 402. a first seal ring.

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 some, not all, of the embodiments of the present invention. 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.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" 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 the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

Some embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The embodiments described below and the features of the embodiments can be combined with each other without conflict.

As shown in fig. 1 to 12, the pilot pressure relief control valve provided by the present application includes a valve body 200, a valve core assembly 100, and a driving mechanism 300, wherein an air inlet end 201, a mounting cavity 203, and an air outlet end 202 are formed on the valve body 200, the air inlet end 201, the mounting cavity 203, and the air outlet end 202 are sequentially communicated and form a fluid pipeline, the driving mechanism 300 is mounted outside the mounting cavity, the valve core assembly 100 is mounted in the mounting cavity 203, and the driving mechanism 300 is used for driving the valve core assembly 100 to open or close the fluid pipeline.

In an alternative embodiment, the valve core assembly 100 includes a reversing mechanism 10 and a cover assembly 20, and the cover assembly 20 is in transmission connection with the driving mechanism 300 through the reversing mechanism 10. The driving mechanism 300 is mounted on the driving mechanism mounting portion 204 outside the valve body 200, the cover assembly 20 is disposed at a side of the air outlet end 202 close to the mounting cavity 203, and the reversing mechanism 10 is connected between the cover assembly 20 and the driving mechanism 300, so that the driving mechanism 300 can control the cover assembly 20 to open or close the air outlet end 202 through the reversing mechanism 10.

It should be noted that the sealing port of the gas outlet end and the valve body 200 may be integrally formed by casting, and the sealing port of the gas outlet end may also be assembled with the valve body 200 by an assembling manner, which is not limited in this application.

In an alternative embodiment, the cover assembly 20 includes a first cover 21 and a second cover 22 having a smaller area than the first cover 21, a pressure relief hole 211 is formed in the first cover 21, the second cover 22 is sealed in the pressure relief hole 211, and the driving mechanism 300 is in transmission connection with the first cover 21 and the second cover 22 through the reversing mechanism 10, so that the driving mechanism 300 can control the first cover 21 and the second cover 22 to open or close the fluid pipeline in a certain sequence.

In this embodiment, the reversing mechanism 10 includes a reversing bracket 13, a transmission assembly 11 and a swing arm assembly 12, the transmission assembly 11 is mounted on the inner wall of the mounting cavity 203 through the reversing bracket 13, the first cover 21 and the second cover 22 are movably connected to the swing arm assembly 12, and the swing arm assembly 12 is in transmission connection with the driving mechanism 300 through the transmission assembly 11, so that after the driving mechanism 300 can control the second cover 22 to open the pressure relief hole 211, the driving mechanism 300 can control the first cover 21 to open the fluid pipeline.

Illustratively, the swing arm assembly 12 is capable of moving relative to the first cover 21 by a first predetermined distance, and the swing arm assembly 12 is capable of moving relative to the second cover 22 by a second predetermined distance, wherein the second predetermined distance may be 0 or any distance less than the first predetermined distance. When the driving mechanism 300 controls the swing arm assembly 12 to swing through the transmission assembly 11, because the first preset distance is greater than the second preset distance, and the stressed area of the first cover body 21 is greater than the stressed area of the second cover body 22, when the driving mechanism 300 drives the swing arm assembly 12 to rotate, the swing arm assembly 12 first drives the second cover body 22 with a small stressed area to move to open the air release hole, and after the second cover body 22 moves to the distance of the position difference between the first preset distance and the second preset distance, the swing arm assembly 12 drives the second cover body 22 and the first cover body 21 to move together, so that the part of the fluid pipeline is opened to be completely opened.

After the technical scheme is adopted, the first cover body 21 and the second cover body 22 can be opened according to a certain sequence under the driving of the driving mechanism 300, the problem that the valve core assembly 100 cannot be opened due to overlarge pressure in the installation cavity 203 is avoided, namely when the pressure in the installation cavity 203 is overlarge, the driving mechanism 300 can drive the second cover body 22 to be opened firstly, the quick pressure relief of the installation cavity 203 is realized, then the first cover body 21 is driven to be opened, the torque required by the cover body assembly 20 is greatly reduced, and meanwhile, the power consumption requirement of the driving mechanism 300 is also reduced.

In an alternative embodiment, the swing arm assembly 12 includes a first swing arm 121 and a second swing arm 122, the second swing arm 122 is movably connected with a first connecting member 1221 and a second connecting member 1222, the first cover 21 is connected with the first connecting member 1221, the second cover 22 is connected with the second connecting member 1222, and the second swing arm 122 is in transmission connection with the transmission assembly 11 through the first swing arm 121. The moving distance of the second swing arm 122 relative to the first connecting member 1221 is greater than the moving distance of the second swing arm 122 relative to the second connecting member 1222, so that the second swing arm 122 can drive the second cover 22 and the first cover 21 to move successively.

Illustratively, the first connecting element 1221 includes a first guiding column and a first elastic restoring element sleeved in the first guiding column, the second connecting element 1222 includes a second guiding column and a second elastic restoring element sleeved in the second guiding column, and the second swing arm 122 is provided with a first through hole and a second through hole. The first guide post penetrates through the first through hole and then is connected with the first cover body 21, the second guide post penetrates through the second through hole and then is connected with the second cover body 22, one end of the first elastic resetting piece is abutted against the second swing arm 122, and the other end of the first elastic resetting piece is abutted against the end part of the first guide post, so that the first cover body 21 and the second swing arm 122 can form a first preset distance under the action of the first guide post and the first elastic resetting piece, namely the second swing arm 122 can move within the range of the first preset distance; one end of the second elastic resetting piece is abutted to the second swing arm 122, and the other end of the second elastic resetting piece is abutted to the end of the second guide post, so that the second cover 22 can form a second preset distance with the second swing arm 122 under the action of the second guide post and the second elastic resetting piece, that is, the second swing arm 122 can move within the range of the second preset distance.

In this embodiment, the first and second elastic restoring members are miniature compression springs.

In addition, by providing the first connecting member 1221 and the second connecting member 1222 on the second swing arm 122, the first cover 21 can be automatically aligned and balanced under the action of the first guiding column, the first through hole and the first elastic restoring member, and the second cover 22 can be automatically aligned and balanced under the action of the second guiding column, the second through hole and the second elastic restoring member.

In an alternative embodiment, the transmission assembly 11 includes a first gear 111 and a second gear 112 in transmission connection with the first gear 111, the first gear 111 is mounted on the output shaft 31 of the driving mechanism 300, and the first swing arm 121 is connected to a transmission shaft 1121 connected to the second gear 112, so that the driving mechanism 300 can drive the first swing arm 121 to swing through the cooperation between the first gear 111 and the second gear 112, and then drive the second swing arm 122 to drive the second cover 22 and the first cover 21 to move through the first swing arm 121.

Wherein, the control valve further comprises a sealing assembly 400, the sealing assembly 400 comprises a first sealing cover 401 and a first sealing ring 402, the first sealing cover 401 is arranged between the driving mechanism 300 and the valve body 200, and the first sealing ring 402 is arranged between the first sealing cover 401 and the valve body 200 for sealing a gap between the driving mechanism 300 and the valve body 200.

In an optional embodiment, the swing arm assembly 12 further includes a first elastic member 123, and a limiting protrusion is disposed on the second swing arm 122, so that the first swing arm 121 can drive the second swing arm 122 to swing through the limiting protrusion. In the present embodiment, the first elastic member 123 is disposed between the first swing arm 121 and the second swing arm 122 to maintain stability between the first swing arm 121 and the second swing arm 122; meanwhile, a certain angle can be formed between the first swing arm and the second swing arm under the action of the limiting protrusion and the first elastic piece.

Illustratively, the first elastic element 123 is installed on a rotating shaft of the first swing arm 121 for connecting the second swing arm 122, one end of the first elastic element 123 abuts against the first swing arm 121 or the rotating shaft 1121, and the other end of the first elastic element 123 abuts against the second swing arm 122.

In an alternative embodiment, the transmission assembly 11 further comprises a third gear 113, and the second gear 112 is in transmission connection with the first gear 111 through the third gear 113.

Illustratively, the third gear 113 is provided with a second tooth portion 1132 and a first tooth portion 1131, wherein the first tooth portion 1131 and the second gear 112 are both bevel gears, the first gear 111 and the second tooth portion 1132 are both straight gears, the second tooth portion 1132 is in meshed connection with the first gear 111, and the first tooth portion 1131 is in meshed connection with the second gear 112, so that the rotation direction of the driving mechanism 300 can be reversed by the reversing mechanism 10, that is, the axial direction of the rotation of the first swing arm 121 is perpendicular to the axial direction of the output shaft of the driving mechanism 300.

In another alternative embodiment, the transmission assembly 11 includes a first gear 111, a second gear 112 and a driving rod 114 connected to the second gear 112, the swing arm assembly 12 is in transmission connection with the second gear 112, the second gear 112 is in transmission connection with the driving mechanism 300 through the first gear 111, so that the driving mechanism 300 can drive the second cover 22 to open the pressure relief hole 211 through the driving rod 114, and the driving mechanism 300 drives the first cover 21 through the second gear 112 to open the fluid pipeline, thereby realizing sequential opening of the second cover 22 and the first cover 21.

Specifically, a driving portion is disposed on the second gear 112, and the driving rod 114 is disposed on one side of the second gear 112 and abutted to the driving portion, so that the driving rod 114 can drive the second gear 112 to rotate through the driving portion, and further drive the swing arm assembly 12 to swing.

Illustratively, the transmission assembly 11 includes a first rotating shaft 115, the first rotating shaft 115 is provided with a first track groove 1151, one end of the driving rod 114 abuts against the driving portion of the second gear 112, and the other end of the driving rod 114 is movably connected in the first track groove 1151.

Firstly, when the driving mechanism 300 drives the first gear 111 to drive the first rotating shaft 115 to rotate, the other end of the driving rod 114 moves along the first track groove 1151, so as to drive the second gear 112 connected to one end of the driving rod 114 to rotate, so that the second gear 112 can drive the second cover 22 to open the pressure relief hole 211 through the swing arm assembly 12; then, the driving mechanism 300 directly drives the second gear 112 to drive the first cover 21 to open the whole fluid pipeline.

It should be noted that the cover assembly 20 may further include a third cover, the third cover is fixed on the swing arm assembly 12, the third cover covers the first pressure relief hole on the second cover 22, the swing arm assembly 12 can move relative to the first cover 21 and the second cover 22, and the moving distance of the swing arm assembly 12 relative to the first cover 21 is greater than the moving distance of the swing arm assembly 12 relative to the second cover 22, that is, the swing arm assembly 12 can drive the third cover to open the first pressure relief hole, then drive the second cover 22 to open the pressure relief hole 211 on the first cover 21, and finally control the first cover 21 to open the whole fluid pipeline. Alternatively, the cover assembly 20 further includes a third cover, a fourth cover, a fifth cover, and so on, which are not specifically enumerated in this application.

In an alternative embodiment, the transmission assembly 11 further comprises a third gear 113 and a transmission member 116, and both the transmission member 116 and the third gear 113 are mounted on the first rotating shaft 115. The third gear 113 is provided with a limiting member, and the transmission member 116 is provided with a limiting groove, so that the third gear 113 can drive the second gear 112 to rotate under the cooperation of the limiting member and the limiting groove.

Illustratively, the limiting member is a circular bead disposed on the third gear 113, the limiting groove is an arc-shaped groove disposed on the transmission member 116, the length of the arc-shaped groove is adapted to the stroke height of the first track groove 1151, the transmission member 116 is fixed on the first rotating shaft 115, the third gear 113 is movably connected to the first rotating shaft 115, that is, the first rotating shaft 115 rotates under the driving of the driving mechanism 300, the driving rod 114 moves along the first track groove 1151 to drive the second gear 112 to rotate, when the transmission member 116 rotates until the limiting member contacts with the end surface of the limiting groove, the transmission member 116 directly drives the third gear 113 to drive the second gear 112 to rotate, and at this time, the driving rod 114 is separated from the first track groove 1151.

In an alternative embodiment, the swing arm assembly 12 further includes a second elastic member 117, one end of the second elastic member 117 is disposed on the reversing bracket 13, and the other end of the second elastic member 117 abuts against the driving rod 114 for limiting and resetting the driving rod 114, when the driving rod 114 is disengaged from the first track groove 1151, the second elastic member 117 presses the driving rod to stop moving up and down, and when the driving rod is rotated reversely, the second elastic member 117 can press the driving rod into the first track groove 1151 again.

In an alternative embodiment, the third gear 113 and the second gear 112 are each provided with a gear having a bevel angle of 45 degrees. Specifically, the third gear 113 is provided with a second tooth portion 1132 and a first tooth portion 1131, and the limiting member is disposed on the first tooth portion 1131, wherein the second tooth portion 1132 and the first gear 111 are straight gears, and both the gears on the first tooth portion 1131 and the second gear 112 are oblique angles of 45 degrees, so as to implement a 90-degree reversing function of the reversing mechanism 10.

In an alternative embodiment, the second cover 22 and the first cover 21 are both circular structures, wherein the pressure relief hole 211 and the side of the air outlet end 202 close to the mounting cavity 203 are both provided with a conical sealing protrusion, and the conical sealing protrusion is matched with the sealing ring structures arranged on the second cover 22 and the first cover 21, so as to ensure the sealing performance between the second cover 22 and the first cover 21 and the sealing performance between the first cover 21 and the air outlet end 202.

It should be noted that the first swing arm 121 and the second swing arm 122 may be an integral structure, and the first swing arm 121 and the second swing arm 122 may be connected by an assembling manner, which is not limited in this application.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected. Either mechanically or electrically. Either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The above disclosure provides many different embodiments or examples for implementing different features of the invention. In order to simplify the disclosure of the present invention, the components and arrangements of specific examples are described above. Of course, they are merely examples and are not intended to limit the present invention. Furthermore, the present invention may repeat reference numerals and/or reference letters in the various examples, which have been repeated for purposes of simplicity and clarity and do not in themselves dictate a relationship between the various embodiments and/or arrangements discussed. In addition, the present disclosure provides examples of various specific processes and materials, but one of ordinary skill in the art may recognize applications of other processes and/or use of other materials.

In the description of the present specification, reference to the description of "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims (10)

1. A pilot pressure relief control valve comprising:

the valve body is provided with an air inlet end, an installation cavity and an air outlet end, and the air inlet end, the installation cavity and the air outlet end are sequentially communicated to form a fluid pipeline;

the valve core assembly comprises a reversing mechanism, a first cover body and a second cover body, a pressure relief hole is formed in the first cover body, the second cover body is sealed in the pressure relief hole, and the driving mechanism is in transmission connection with the first cover body and the second cover body through the reversing mechanism;

the reversing mechanism comprises a reversing support, a transmission assembly and a swing arm assembly, the transmission assembly is installed on the inner wall of the installation cavity through the reversing support, the first cover body and the second cover body are movably connected with the swing arm assembly, the swing arm assembly is in transmission connection with the driving mechanism through the transmission assembly, so that the driving mechanism can control the second cover body to open the pressure relief hole firstly, and then the driving mechanism controls the first cover body to open the fluid pipeline.

2. The control valve of claim 1, wherein the swing arm assembly comprises a first swing arm and a second swing arm, a first connecting member and a second connecting member are movably connected to the second swing arm, the first cover body is connected to the first connecting member, the second cover body is connected to the second connecting member, and the second swing arm is in transmission connection with the transmission assembly through the first swing arm;

the movable distance of the second swing arm relative to the first connecting piece is larger than that of the second swing arm relative to the second connecting piece.

3. The control valve of claim 2, wherein the transmission assembly comprises a first gear and a second gear in transmission connection with the first gear, the first gear is mounted on the output shaft of the drive mechanism, and the first swing arm is connected with the transmission shaft on the second gear, so that the drive mechanism can drive the first swing arm to swing through the cooperation of the first gear and the second gear.

4. The control valve of claim 3, wherein the swing arm assembly further comprises a first elastic member, a limiting protrusion is disposed on the second swing arm, the first swing arm drives the second swing arm to swing through the limiting protrusion, and the first elastic member is disposed between the first swing arm and the second swing arm.

5. The control valve of claim 3, wherein the transmission assembly further comprises a third gear, the second gear being in driving connection with the first gear through the third gear.

6. The control valve of claim 2, wherein the transmission assembly comprises a first gear, a second gear and a driving rod connected with the second gear, the swing arm assembly is in transmission connection with the second gear, the second gear is in transmission connection with the driving mechanism through the first gear, so that the driving mechanism can drive the second cover to open the pressure relief hole through the driving rod, and the driving mechanism drives the first cover to open the fluid pipeline through the second gear.

7. The control valve of claim 6, wherein the transmission assembly includes a first shaft, the first shaft defines a first track groove, one end of the driving rod abuts against the driving portion of the second gear, and the other end of the driving rod is movably connected to the first track groove.

8. The control valve according to claim 7, wherein the transmission assembly further comprises a third gear and a transmission member, the third gear is provided with a limiting member, the transmission member is provided with a limiting groove, and the transmission member and the third gear are both mounted on the first rotating shaft, so that the third gear can drive the second gear to rotate under the cooperation of the limiting member and the limiting groove.

9. The control valve of claim 8, wherein the swing arm assembly further comprises a second resilient member, one end of the second resilient member being disposed on the reversing bracket, the other end of the second resilient member abutting the drive rod.

10. The control valve of claim 8, wherein the third gear and the second gear each have a 45 degree bevel gear thereon.

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