Pressure reducing valve

Abstract

The application relates to a pressure reducing valve, which comprises a valve body, a push rod assembly, a switch assembly, a switch shaft and a locking ring. The valve body is provided with an air inlet cavity, and the push rod assembly is movably arranged in the air inlet cavity. When the switch assembly rotates by a first preset angle around its own axis, the switch assembly can drive the switch shaft to rotate synchronously and push the push rod assembly to open the one-way valve of a liquefied gas tank through the switch shaft. When the switch assembly rotates by a second preset angle around its own axis, the switch assembly can drive the switch shaft to rotate synchronously, and the push rod assembly can close the one-way valve of the liquefied gas tank. The valve body is provided with a clamping groove used for clamping the fixing ring of the liquefied gas tank, and the switch assembly can move by a preset distance along its own axis to push the locking ring to open the clamping groove. The pressure reducing valve provided by the application solves the problems that the pressure reducing valve cannot quickly open or cut off the gas path, and the pressure reducing valve and the liquefied gas tank are prone to loosening and causing the leakage of high-pressure gas in the liquefied gas tank.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of valves, in particular to a pressure reducing valve. BACKGROUND

[0002] In the technical field of valves, a pressure reducing valve needs to be installed before a gas tank ventilates a cooking appliance to reduce the gas pressure entering the cooking appliance. The existing pressure reducing valve is straight-through type, which cannot quickly open or cut off the gas path, and the pressure reducing valve and the gas tank are prone to loosen and cause the high-pressure gas in the gas tank to leak, thereby causing a greater safety hazard. SUMMARY

[0003] Therefore, it is necessary to provide a pressure reducing valve to solve the problem that the pressure reducing valve cannot quickly open or cut off the gas path, and the pressure reducing valve and the gas tank are prone to loosen and cause the high-pressure gas in the gas tank to leak, thereby causing a greater safety hazard.

[0004] The pressure reducing valve comprises a valve body, a push rod assembly, a switch assembly, a switch shaft and a locking ring. The valve body is provided with an air inlet cavity. The push rod assembly is movably arranged in the air inlet cavity. When the switch assembly rotates by a first preset angle around its own axis, the switch assembly can drive the switch shaft to rotate synchronously and push the push rod assembly to open the one-way valve of the gas tank through the switch shaft, so that the gas tank is connected to the air inlet cavity through the one-way valve. When the switch assembly rotates by a second preset angle around its own axis, the switch assembly can drive the switch shaft to rotate synchronously, and the push rod assembly can close the one-way valve of the gas tank, so that the one-way valve of the gas tank is not connected to the air inlet cavity. The valve body is provided with a clamping groove for clamping the fixing ring of the gas tank. The locking ring is movably arranged in the clamping groove. The switch assembly can move by a preset distance along its own axis to push the locking ring to open the clamping groove.

[0005] In one embodiment, the locking ring is provided with a first clamping protrusion, and the switch shaft is provided with a movable groove corresponding to the first clamping protrusion. When the switch assembly drives the switch shaft to rotate by the second preset angle along its own axis, the opening of the movable groove faces the first clamping protrusion, and the switch assembly can drive the first clamping protrusion to move in the movable groove to push the locking ring to open the clamping groove. It can be understood that in this way, when the pressure reducing valve is installed or removed, the one-way valve of the gas tank is in a closed state, thereby avoiding the leakage of high-pressure gas in the gas tank.

[0006] In one embodiment, the movable groove is provided with a stop plane, and the switch assembly can move the locking ring by a preset distance along its own axis and stop at the stop plane. It can be understood that in this way, the distance of the locking ring moving along the axis of the switch assembly is limited.

[0007] In one of the embodiments, the switch shaft is further provided with a mounting groove, when the switch assembly drives the switch shaft to rotate along the axial direction of the switch shaft by a first preset angle, the first clamping protrusion can extend into the mounting groove and stop at the side wall of the end of the mounting groove away from the switch assembly, so as to prevent the locking clasp from moving towards the direction away from the switch assembly. It can be understood that, in this way, the reduced pressure valve can be fixedly connected with the liquefied gas tank when the liquefied gas tank is ventilated to the air inlet cavity, thereby avoiding the leakage of high-pressure gas in the liquefied gas tank.

[0008] In one of the embodiments, the switch assembly is sleeved on the outside of the switch shaft, and the switch shaft is fixedly connected with the switch assembly along the circumferential direction of the switch shaft, so that the switch assembly can drive the switch shaft to rotate synchronously. It can be understood that, in this way,

[0009] In one of the embodiments, the end of the switch shaft away from the switch assembly extends into the air inlet cavity, and the switch shaft is provided with a notch portion, when the switch assembly drives the switch shaft to rotate around the axial direction of the switch shaft by a second preset angle, the push rod assembly can move towards the direction away from the check valve and extend into the notch portion. It can be understood that, in this way,

[0010] When the switch assembly drives the switch shaft to rotate around the axial direction of the switch shaft by a first preset angle, the outer wall of the switch shaft is pressed to the push rod assembly and can drive the push rod assembly to move towards the direction close to the check valve. It can be understood that, in this way, the efficiency of the rotating connection between the switch shaft and the push rod assembly is improved, which facilitates the quick opening or closing of the check valve.

[0011] In one of the embodiments, the switch assembly includes a switch handle and a second compression spring, the switch handle is movably sleeved on the outside of the switch shaft, the second compression spring is arranged between the switch shaft and the switch handle, and the second compression spring has a tendency to drive the switch handle to move towards the direction away from the switch shaft. It can be understood that, in this way, the switch handle can drive the locking clasp to move towards the direction close to the switch shaft to open the clamping groove, and the second compression spring can drive the switch handle to move towards the direction away from the switch shaft to lock the fixing ring of the liquefied gas tank.

[0012] In one of the embodiments, the locking clasp is provided with a second clamping protrusion, the switch handle is provided with a clamping matching groove corresponding to the second clamping protrusion, and the second clamping protrusion is clamped and matched with the inner wall of the clamping matching groove along the axial direction of the switch handle. It can be understood that, in this way, the assembly difficulty of the switch handle and the locking clasp is reduced, and the switch handle can drive the locking clasp to move towards the direction close to the switch shaft to open the clamping groove.

[0013] In one of the embodiments, the locking ring is movably arranged at the opening of the clamping groove and clamps the fixing ring of the liquefied gas tank in cooperation with the inner wall of the clamping groove. When the switch assembly drives the locking ring to move along the axial direction of the switch assembly by a preset distance, the locking ring can release the fixing ring of the liquefied gas tank. It can be understood that, in this way, the connection between the pressure reducing valve and the liquefied gas tank is enhanced, and the pressure reducing valve can be quickly installed and dismounted.

[0014] In one of the embodiments, the push rod assembly comprises a rod body and a first compression spring sleeved on the outer periphery of the rod body. The rod body is provided with an annular protrusion. One end of the first compression spring is fixedly connected to the inner wall of the air inlet cavity, and the other end is stopped at the annular protrusion. The first compression spring has a tendency to push the rod body to move away from the one-way valve. It can be understood that, in this way, the first compression spring can push the rod body to move away from the one-way valve to close the one-way valve.

[0015] The pressure reducing valve provided by the present application enhances the connection between the liquefied gas tank and the pressure reducing valve by arranging the locking ring and the clamping groove. Thus, the problem that the pressure reducing valve and the liquefied gas tank are released and the high-pressure gas in the liquefied gas tank leaks is avoided. The switch assembly is arranged to move along the axial direction of the switch assembly by a preset distance to push the locking ring to open the clamping groove. Thus, the clamping groove can be quickly opened or closed, and the assembly difficulty of the fixing ring of the pressure reducing valve and the liquefied gas tank is reduced. Further, the switch assembly is arranged to drive the switch shaft to synchronously rotate by a first preset angle around the axial direction of the switch shaft to push the push rod assembly to open the one-way valve of the liquefied gas tank. This is conducive to quickly connecting the liquefied gas tank and the air inlet cavity of the pressure reducing valve. Moreover, the switch assembly is arranged to drive the switch shaft to synchronously rotate by a first preset angle around the axial direction of the switch shaft, and the push rod assembly can close the one-way valve of the liquefied gas tank. This is conducive to quickly blocking the liquefied gas tank and the air inlet cavity of the pressure reducing valve. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the following embodiment or prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0017] Figure 1 A cross-sectional view of the pressure reducing valve of one of the embodiments provided by the present application;

[0018] Figure 2 A left view of the switch shaft of one of the embodiments provided by the present application.

[0019] Reference: 1, valve body; 11, air inlet cavity; 2, push rod assembly; 21, rod body; 211, annular protrusion; 22, first compression spring; 3, switch assembly; 31, switch handle; 311, clamping fitting groove; 312, threaded hole; 32, second compression spring; 4, switch shaft; 41, movable slot; 411, stop flat; 42, installation slot; 43, notch part; 44, main body part; 45, lever; 451, installation flat; 452, first circular arc transition section; 453, second circular arc transition section; 5, locking ring; 51, first clamping protrusion; 52, second clamping protrusion; 6, clamping groove; 7, step structure; 8, sealing ring; 9, pressure reduction cavity; 91, pressure reduction device; 10, through hole. DETAILED DESCRIPTION

[0020] To make the above objectives, features and advantages of the present application more clear and easily understood, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings. In the following description, a lot of specific details are set forth in order to fully understand the present application. However, the present application can be implemented in many different ways other than those described herein, and those skilled in the art can make similar improvements without departing from the spirit of the present application, so the present application is not limited to the specific embodiments disclosed below.

[0021] It should be noted that when a component is referred to as "fixed to" or "disposed on" another component, it can be directly on the other component or there can be a middle component. When a component is referred to as "connected to" another component, it can be directly connected to the other component or there can be a middle component. The terms "vertical", "horizontal", "up", "down", "left", "right", and similar expressions used in the description of the present application are for the purpose of illustration only, and do not indicate the only implementation.

[0022] In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, for example, two, three, etc., unless otherwise specifically limited.

[0023] In the present application, unless specifically defined and limited otherwise, the first feature is "on", "under", "above" or "over" the second feature can be that the first feature is in direct contact with the second feature, or the first feature is indirectly in contact with the second feature through an intermediate medium. Moreover, the first feature is "on", "above" and "over" the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the first feature is higher than the second feature in horizontal height. The first feature is "under", "below" and "under" the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the first feature is lower than the second feature in horizontal height.

[0024] Unless otherwise defined, all technical and scientific terms used in the specification of the present application have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs. The terms used in the specification of the present application are only for the purpose of describing specific embodiments and are not intended to limit the present application. The term "and / or" used in the specification of the present application includes any and all combinations of one or more related listed items.

[0025] In the valve technology field, a pressure reducing valve needs to be installed before the gas stove is ventilated to reduce the gas pressure entering the gas stove. The existing pressure reducing valve is straight-through type, which cannot quickly open or cut off the gas path, and the pressure reducing valve and the liquefied gas tank are prone to loosen and cause leakage of high-pressure gas in the liquefied gas tank, thereby causing a greater safety hazard.

[0026] In order to solve the problem that the pressure reducing valve cannot quickly open or cut off the gas path, and the pressure reducing valve and the liquefied gas tank are prone to loosen and cause leakage of high-pressure gas in the liquefied gas tank, thereby causing a greater safety hazard.

[0027] Please refer to Figure 1 The present application provides a pressure reducing valve. Specifically, the pressure reducing valve comprises a valve body 1, a push rod assembly 2, a switch assembly 3, a switch shaft 4 and a locking ring 5. The valve body 1 is provided with an air inlet cavity 11, and the push rod assembly 2 is movably arranged in the air inlet cavity 11. When the switch assembly 3 rotates by a first preset angle around its own axis, the switch assembly 3 can drive the switch shaft 4 to rotate synchronously and push the push rod assembly 2 to open the one-way valve of the liquefied gas tank through the switch shaft 4, so that the liquefied gas tank is connected to the air inlet cavity 11 through the one-way valve. When the switch assembly 3 rotates by a second preset angle around its own axis, the switch assembly 3 can drive the switch shaft 4 to rotate synchronously, and the push rod assembly 2 can close the one-way valve of the liquefied gas tank, so that the one-way valve of the liquefied gas tank is not connected to the air inlet cavity 11. The valve body 1 is provided with a clamping groove 6 for clamping the fixing ring of the liquefied gas tank, and the locking ring 5 is movably arranged in the clamping groove 6. The switch assembly 3 can move a preset distance along its own axis to push the locking ring 5 to open the clamping groove 6.

[0028] The liquefied gas tank and the pressure reducing valve are connected more firmly by setting and locking the clamping ring 5 and the clamping groove 6, thereby avoiding the problem that the pressure reducing valve and the liquefied gas tank are loosened and the high-pressure gas in the liquefied gas tank leaks. The clamping groove 6 is quickly opened or closed by setting the switch assembly 3 to move along the axial direction of the switch assembly 3 by a preset distance to push the clamping ring 5 to open the clamping groove 6, thereby reducing the assembly difficulty of the fixing ring of the pressure reducing valve and the liquefied gas tank. Further, the one-way valve of the liquefied gas tank is quickly opened by setting the switch assembly 3 to drive the switch shaft 4 to synchronously rotate around the axial direction of the switch shaft 4 by a first preset angle to push the push rod assembly 2 to open the one-way valve of the liquefied gas tank, thereby facilitating the quick connection of the gas inlet cavity 11 of the pressure reducing valve and the liquefied gas tank. In addition, the one-way valve of the liquefied gas tank is quickly closed by setting the switch assembly 3 to drive the switch shaft 4 to synchronously rotate around the axial direction of the switch shaft 4 by a first preset angle, and the push rod assembly 2 can close the one-way valve of the liquefied gas tank, thereby facilitating the quick blocking of the gas inlet cavity 11 of the pressure reducing valve and the liquefied gas tank.

[0029] In an embodiment, as shown in Figure 1 The clamping ring 5 is provided with a first clamping protrusion 51, and the switch shaft 4 is provided with a movable groove 41 corresponding to the first clamping protrusion 51. When the switch assembly 3 drives the switch shaft 4 to rotate along the axial direction of the switch shaft 4 by a second preset angle, the opening of the movable groove 41 faces the first clamping protrusion 51, and the switch assembly 3 can drive the first clamping protrusion 51 to move in the movable groove 41 to push the clamping ring 5 to open the clamping groove 6.

[0030] Since the push rod assembly 2 can close the one-way valve of the liquefied gas tank when the switch assembly 3 drives the switch shaft 4 to rotate along the axial direction of the switch shaft 4 by a second preset angle, so that the one-way valve of the liquefied gas tank and the gas inlet cavity 11 are not connected, and since the switch assembly 3 can drive the first clamping protrusion 51 to move in the movable groove 41 to push the clamping ring 5 to open the clamping groove 6. Therefore, by such setting, it can be ensured that the one-way valve of the liquefied gas tank is in a closed state when the pressure reducing valve is installed or removed, thereby avoiding the leakage of high-pressure gas in the liquefied gas tank.

[0031] Specifically, the switch shaft 4 can be processed by turning to form the movable groove 41.

[0032] Further, in an embodiment, as shown in Figure 1 The movable groove 41 is provided with a stop plane 411, and the switch assembly 3 can push the clamping ring 5 to move along the axial direction of the switch assembly 3 by a preset distance and stop at the stop plane 411.

[0033] By setting the stop plane 411, it is convenient to limit the distance of the clamping ring 5 moving along the axial direction of the switch shaft 4.

[0034] In an embodiment, as shown in Figure 1As shown, the switch shaft 4 is further provided with a receiving groove 42, when the switch assembly 3 drives the switch shaft 4 to rotate along the axial direction of the switch shaft 4 by a first preset angle, the first clamping protrusion 51 can extend into the receiving groove 42 and stop at the side wall of the receiving groove 42 away from the switch assembly 3, so as to prevent the locking ring 5 from moving towards the direction away from the switch assembly 3.

[0035] Since when the switch assembly 3 rotates around the axial direction of the switch assembly 3 by a first preset angle, the switch assembly 3 can drive the switch shaft 4 to rotate synchronously and push the push rod assembly 2 to open the one-way valve of the liquefied gas tank through the switch shaft 4, so that the liquefied gas tank is communicated with the air inlet cavity 11 through the one-way valve. And because the first clamping protrusion 51 can extend into the receiving groove 42 and stop at the side wall of the receiving groove 42 away from the switch assembly 3, so as to prevent the locking ring 5 from moving towards the direction away from the switch assembly 3. Therefore, when the liquefied gas tank is communicated with the air inlet cavity 11, the switch assembly 3 cannot push the locking ring 5 to open the clamping groove 6.

[0036] In this way, it can be ensured that when the liquefied gas tank is ventilated to the air inlet cavity 11, the pressure relief valve and the liquefied gas tank are always fixedly connected, thereby avoiding the leakage of high-pressure gas in the liquefied gas tank.

[0037] Similarly, the switch shaft 4 can be processed by turning to form the receiving groove 42.

[0038] In an embodiment, as shown in the drawings, Figure 1 The switch assembly 3 is sleeved on the outside of the switch shaft 4, and the switch shaft 4 is fixedly matched with the switch assembly 3 along the circumferential direction of the switch shaft 4, so that the switch assembly 3 can drive the switch shaft 4 to rotate synchronously.

[0039] In this way, the assembly difficulty of the switch assembly 3 and the switch shaft 4 is reduced.

[0040] In an embodiment, as shown in the drawings, Figure 1 The end of the switch shaft 4 away from the switch assembly 3 extends into the air inlet cavity 11, and the switch shaft 4 is provided with a notch portion 43, when the switch assembly 3 drives the switch shaft 4 to rotate around the axial direction of the switch shaft 4 by a second preset angle, the push rod assembly 2 can move towards the direction away from the one-way valve and extend into the notch portion 43. When the switch assembly 3 drives the switch shaft 4 to rotate around the axial direction of the switch shaft 4 by a first preset angle, the outer wall of the switch shaft 4 is pressed to the push rod assembly 2 and can drive the push rod assembly 2 to move towards the direction close to the one-way valve.

[0041] By providing the notch portion 43, the rotating matching efficiency of the switch shaft 4 and the push rod assembly 2 is improved, which is convenient for quickly opening or closing the one-way valve.

[0042] Specifically, the switch shaft 4 comprises a main body 44 and a lever 45 distributed along the axis of the switch shaft 4, the lever 45 is connected to the end of the main body 44 away from the switch assembly 3, and the lever 45 is eccentrically arranged relative to the axis of the main body 44, so that the side wall of the lever 45 and the end surface of the switch shaft 4 form a notch 43.

[0043] Further, in an embodiment, the lever 45 and the main body 44 are integrally formed, and the main body 44 is processed by turning to form the lever 45 and the notch 43.

[0044] In this way, the structural strength of the switch shaft 4 is enhanced.

[0045] Further, in an embodiment, as shown in Figure 2 , the end of the lever 45 close to the notch 43 is provided with a setting plane 451.

[0046] In this way, the main body 44 is processed by turning to form the notch 43.

[0047] Further, in an embodiment, as shown in Figure 2 , the connection between the setting plane 451 and the side wall of the lever 45 is provided with a first arc transition section 452 and a second arc transition section 453.

[0048] By providing the first arc transition section 452 and the second arc transition section 453, the lever 45 is rotatably connected with the end of the push rod assembly 2.

[0049] In an embodiment, as shown in Figure 1 , the axis of the switch shaft 4 is perpendicular to the axis of the push rod assembly 2.

[0050] In this way, the switch shaft 4 pushes the push rod assembly 2 to move towards the direction close to the one-way valve.

[0051] Further, in an embodiment, as shown in Figure 1 , along the radial direction of the switch shaft 4, the notch 43 and the movable slot 41 are arranged on the same side of the switch shaft 4, and the setting slot 42 is arranged on the other side of the switch shaft 4.

[0052] In this way, when the switch assembly 3 drives the switch shaft 4 to synchronously rotate 180° around the axis of the switch shaft 4, the switch assembly 3 pushes the push rod assembly 2 to open the one-way valve of the liquefied gas tank, and when the switch assembly 3 drives the switch shaft 4 to continue rotating 180°, the push rod assembly 2 can close the one-way valve.

[0053] In an embodiment, as shown in Figure 1As shown, the switch assembly 3 comprises a switch handle 31 movably sleeved outside the switch shaft 4 and a second compression spring 32 arranged between the switch shaft 4 and the switch handle 31, and the second compression spring 32 has a tendency to push the switch handle 31 to move towards the direction away from the switch shaft 4.

[0054] In this way, the switch handle 31 pushes the locking ring 5 to move towards the direction close to the switch shaft 4 to open the clamping groove 6, and the second compression spring 32 pushes the switch handle 31 to move towards the direction away from the switch shaft 4 to lock the fixing ring of the liquefied gas tank in the clamping groove 6.

[0055] Further, in an embodiment, as shown in Figure 1 The locking ring 5 is provided with a second clamping protrusion 52, and the switch handle 31 is provided with a clamping matching groove 311 corresponding to the second clamping protrusion 52, and the second clamping protrusion 52 and the inner wall of the clamping matching groove 311 are clamped and matched along the axial direction of the switch handle 31.

[0056] In this way, the assembly difficulty of the switch handle 31 and the locking ring 5 is reduced, and the switch handle 31 can push the locking ring 5 to move towards the direction close to the switch shaft 4 to open the clamping groove 6.

[0057] Further, in an embodiment, the pressure reducing valve further comprises a fastening screw (not shown in the figure), and one end of the switch handle 31 away from the switch shaft 4 is provided with a threaded hole 312, the fastening screw extends into the threaded hole 312 from the side of the switch shaft 4 provided with the installation groove 42 and is threadedly matched with the threaded hole 312, and the head of the fastening screw is stopped on the outer wall of the threaded hole.

[0058] In this way, whether the liquefied gas tank is in communication with the gas inlet cavity 11 can be judged according to the position of the head of the fastening screw.

[0059] However, the fastening screw can also extend into the threaded hole from the side of the switch shaft 4 provided with the movable groove 41 in other embodiments.

[0060] In an embodiment, as shown in Figure 1 The locking ring 5 is movably arranged at the opening of the clamping groove 6 and clamps the fixing ring of the liquefied gas tank in cooperation with the inner wall of the clamping groove 6, and when the switch assembly 3 drives the locking ring 5 to move along the axial direction of the locking ring 5 towards the switch shaft 4 by a predetermined distance, the locking ring 5 can release the fixing ring of the liquefied gas tank.

[0061] In this way, the connection between the pressure reducing valve and the liquefied gas tank is enhanced, and the pressure reducing valve can be quickly installed and disassembled.

[0062] Further, in an embodiment, as shown in Figure 1As shown, the snap-fit ​​groove 6 is annular, the locking ring 5 is offset from the snap-fit ​​groove 6, and a stepped structure 7 is formed by clamping the snap-fit ​​groove 6 with the inner wall of the snap-fit ​​groove 6 at the opening. The fixing ring of the liquefied gas tank extends into the snap-fit ​​groove 6 and is stopped by the stepped structure 7.

[0063] By setting the stepped structure 7, the connection between the pressure reducing valve and the liquefied gas tank is further strengthened.

[0064] In one embodiment, such as Figure 1 As shown, the push rod assembly 2 includes a rod body 21 and a first compression spring 22 sleeved on the outer periphery of the rod body 21. The rod body 21 is provided with an annular protrusion 211. One end of the first compression spring 22 is fixedly connected to the inner wall of the air intake chamber 11, and the other end is stopped by the annular protrusion 211. The first compression spring 22 has a tendency to push the rod body 21 to move away from the one-way valve.

[0065] This allows the first compression spring 22 to push the rod 21 away from the check valve to close the check valve.

[0066] In one embodiment, such as Figure 1 As shown, the pressure reducing valve also includes a sealing ring 8, which is sleeved on the outside of the switch shaft 4 so that the switch shaft 4 and the inner wall of the air intake chamber 11 are sealed together.

[0067] This enhances the sealing of the air intake chamber 11, thereby preventing gas leakage from the air intake chamber 11.

[0068] In one embodiment, such as Figure 1 As shown, the valve body 1 is also provided with a pressure reducing chamber 9 and a through hole 10 connecting the pressure reducing chamber 9 and the air intake chamber 11. The pressure reducing chamber 9 is provided with a pressure reducing device 91, which is movably disposed at the opening of the through hole 10. The pressure reducing device 91 can increase or decrease the air intake cross-sectional area of ​​the through hole 10 to increase or decrease the air intake volume of the pressure reducing chamber 9.

[0069] Thus, by increasing or decreasing the cross-sectional area of ​​the through hole 10, the air intake of the pressure reducing chamber 9 can be increased or decreased, thereby adjusting the gas pressure inside the pressure reducing chamber 9.

[0070] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0071] The above-described embodiments are merely illustrative of several embodiments of the present application, which are described in more detail and in a specific manner, but should not be construed as limiting the scope of the patent application. It should be noted that for those skilled in the art, several modifications and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the patent protection scope of the present application should be subject to the appended claims.

Claims

1. A pressure reducing valve characterized by comprising: The pressure reducing valve comprises a valve body (1), a push rod assembly (2), a switch assembly (3), a switch shaft (4) and a locking ring (5), the valve body (1) is provided with an air inlet cavity (11), the push rod assembly (2) is movably arranged in the air inlet cavity (11), When the switch assembly (3) rotates by a first preset angle around its own axis, the switch assembly (3) can drive the switch shaft (4) to rotate synchronously and push the push rod assembly (2) to open the one-way valve of the liquefied gas tank through the switch shaft (4), so that the liquefied gas tank is communicated with the air inlet cavity (11) through the one-way valve, When the switch assembly (3) rotates by a second preset angle around its own axis, the switch assembly (3) can drive the switch shaft (4) to rotate synchronously, and the push rod assembly (2) can close the one-way valve of the liquefied gas tank, so that the one-way valve of the liquefied gas tank is not communicated with the air inlet cavity (11); The valve body (1) is provided with a clamping groove (6) for clamping the fixing ring of the liquefied gas tank, and the locking ring (5) is movably arranged in the clamping groove (6), and the switch assembly (3) can move along its own axis by a preset distance to push the locking ring (5) to open the clamping groove (6); The locking ring (5) is provided with a first clamping protrusion (51), and the switch shaft (4) is provided with a movable groove (41) corresponding to the first clamping protrusion (51), when the switch assembly (3) drives the switch shaft (4) to rotate by a second preset angle along its own axis, the opening of the movable groove (41) faces the first clamping protrusion (51), and the switch assembly (3) can drive the first clamping protrusion (51) to move in the movable groove (41) to push the locking ring (5) to open the clamping groove (6); The switch assembly (3) is sleeved on the outside of the switch shaft (4), and the switch shaft (4) is fixedly connected with the switch assembly (3) along its own circumference, so that the switch assembly (3) can drive the switch shaft (4) to rotate synchronously.

2. The pressure reducing valve according to claim 1, characterized by The movable groove (41) is provided with a stop plane (411), and the switch assembly (3) can push the locking ring (5) to move along its own axis by a preset distance and stop at the stop plane (411).

3. The pressure reducing valve according to claim 1, wherein The switch shaft (4) is also provided with a mounting groove (42), when the switch assembly (3) drives the switch shaft (4) to rotate by a first preset angle along its own axis, the first clamping protrusion (51) can extend into the mounting groove (42) and stop at the side wall of one end of the mounting groove (42) away from the switch assembly (3), so as to prevent the locking ring (5) from moving away from the switch assembly (3).

4. The pressure reducing valve according to claim 1, wherein The switch shaft (4) extends into the air inlet cavity (11) at one end away from the switch assembly (3), and the switch shaft (4) is provided with a notch portion (43), when the switch assembly (3) drives the switch shaft (4) to rotate around the axis by a second preset angle, the push rod assembly (2) can move towards the direction away from the one-way valve and extend into the notch portion (43); When the switch assembly (3) drives the switch shaft (4) to rotate around the axis by a first preset angle, the outer wall of the switch shaft (4) is in contact with the push rod assembly (2) and can drive the push rod assembly (2) to move towards the direction close to the one-way valve.

5. The pressure reducing valve according to claim 1, wherein The switch assembly (3) comprises a switch handle (31) and a second compression spring (32), the switch handle (31) is movably sleeved on the outer side of the switch shaft (4), the second compression spring (32) is arranged between the switch shaft (4) and the switch handle (31), and the second compression spring (32) has a tendency to drive the switch handle (31) to move away from the switch shaft (4).

6. The pressure reducing valve according to claim 5, wherein The locking ring (5) is provided with a second clamping protrusion (52), the switch handle (31) is provided with a clamping groove (311) corresponding to the second clamping protrusion (52), and the second clamping protrusion (52) and the inner wall of the clamping groove (311) are clamped and matched along the axis of the switch handle (31).

7. The pressure reducing valve according to claim 1, wherein The locking ring (5) is movably arranged at the opening of the clamping groove (6), and cooperates with the inner wall of the clamping groove (6) to clamp the fixing ring of the liquefied gas tank, when the switch assembly (3) drives the locking ring (5) to move along the axis by a preset distance, the locking ring (5) can release the fixing ring of the liquefied gas tank.

8. The pressure reducing valve according to claim 1, wherein The push rod assembly (2) comprises a rod body (21) and a first compression spring (22) sleeved on the outer periphery of the rod body (21), the rod body (21) is provided with an annular protrusion (211), one end of the first compression spring (22) is fixedly connected to the inner wall of the air inlet cavity (11), and the other end is stopped on the annular protrusion (211), and the first compression spring (22) has a tendency to drive the rod body (21) to move away from the one-way valve.

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