Exhaust valve

Abstract

The utility model belongs to the technical field of valves, and discloses an exhaust valve. The exhaust valve comprises a valve shell and an exhaust assembly, the valve shell is provided with an installation hole, the exhaust assembly comprises a valve seat and an end cover, the valve seat is installed at the installation hole in a sealed mode and provided with an exhaust channel, and the end cover is movably arranged at the end, located outside the valve shell, of the valve seat in a sleeving mode so as to block or open an outlet of the exhaust channel. A limiting groove is formed in the outer side wall of the valve seat in the circumferential direction, a limiting through hole is formed in the end cover, and part of the plug pin is contained in the limiting groove and the limiting through hole at the same time. According to the exhaust valve provided by the utility model, the plug pin is arranged, so that the axial movement of the end cover along the valve seat can be limited, the phenomenon that the end cover falls off due to equipment vibration is avoided, the exhaust valve has higher reliability, the plug pin is convenient and rapid to disassemble and assemble, the mounting difficulty and cost are reduced, and the maintenance and replacement of the valve are also convenient and fast.

Description

TECHNICAL FIELD

[0001] The utility model relates to valve technical field especially, relates to a exhaust valve. BACKGROUND

[0002] When the liquid in the pipeline flows, the gas contained in the liquid will flow in the pipeline with the flow of the liquid and gradually accumulate at the highest point. The exhaust valve is usually arranged at the highest point or the local high point of the system pipeline to discharge the air in the pipeline and avoid overpressure in the pipeline.

[0003] In the related art, the exhaust valve usually comprises a valve shell and an exhaust assembly. The upper end of the valve shell is provided with a mounting hole. The exhaust assembly mainly comprises a valve seat and an end cover. The valve seat is mounted in the mounting hole of the valve shell. An exhaust passage is arranged in the valve seat. The end cover is threadedly connected to the valve seat. By tightening or loosening the end cover, the outlet of the exhaust passage can be closed or opened. However, when the exhaust valve is used on the equipment, the end cover is easily detached due to vibration of the equipment, which affects the reliability of the exhaust valve.

[0004] Therefore, there is an urgent need to provide an exhaust valve to solve the above problems. SUMMARY

[0005] The utility model discloses a kind of exhaust valves, can avoid the phenomenon that end cover drops off, so that exhaust valve has higher reliability.

[0006] To achieve this purpose, the utility model adopts the following technical solutions:

[0007] Exhaust valve, including valve shell and exhaust assembly, the valve shell has mounting hole, the exhaust assembly includes valve seat and end cover, the valve seat is sealedly installed at the mounting hole, exhaust passage is equipped in the valve seat, the end cover is movably sleeved in the one end of the valve seat located outside the valve shell, to close or open the outlet of the exhaust passage, the exhaust assembly further includes bolt, the outer side wall of the valve seat is along its circumferential direction and is provided with limit slot, the outer side wall of the end cover is provided with limit through-hole, part of the bolt is simultaneously contained in the limit slot and the limit through-hole.

[0008] As an optional scheme, the bolt is U-shaped, including two limit parts and connecting part connected between the two limit parts, the outer side wall of the end cover is provided with the limit through-hole on two opposite sides, part of the limit part of each limit part is contained in the limit slot and the corresponding limit through-hole, and the connecting part is located outside the end cover.

[0009] As an optional scheme, the limit part is linear, and the limit through-hole is a linear hole matched with the limit part.

[0010] As an optional scheme, the inner side of the limiting part comprises a circular arc side and a straight line side connected to both ends of the circular arc side, the limiting through hole is a straight line hole, the hole bottom of the limiting through hole has a hole opening, part of the slot bottom of the limiting slot passes through the hole opening and is located in the limiting through hole, the circular arc side is matched with the slot bottom of the limiting slot, and the straight line side is matched with the hole bottom of the limiting through hole.

[0011] As an optional scheme, the width of the limiting slot in the axial direction is greater than the size of the plug along the axial direction of the valve seat.

[0012] As an optional scheme, the end cover comprises a barrel portion sleeved on the outer periphery of the valve seat and a cover portion blocked at one end of the barrel portion, one end of the limiting slot close to the cover portion has a first limiting surface, and the plug can abut against the first limiting surface when the end cover opens the outlet of the exhaust passage.

[0013] As an optional scheme, a sealing gasket is arranged on the inner side of the end cover towards the position of the exhaust passage, and the sealing gasket is used for sealing the outlet of the exhaust passage.

[0014] As an optional scheme, the limiting slot further has a second limiting surface opposite to the first limiting surface, and the plug can abut against the second limiting surface when the sealing gasket seals the outlet of the exhaust passage.

[0015] As an optional scheme, an anti-skid structure is arranged on the outer peripheral surface of the end cover.

[0016] As an optional scheme, the mounting hole is a stepped hole, the large-diameter end of the stepped hole is arranged outward, a first sealing element is arranged between the stepped surface of the stepped hole and the valve seat, and a second sealing element is arranged between the small-diameter end of the stepped hole and the valve seat.

[0017] The utility model discloses beneficial effects:

[0018] The utility model provides a kind of exhaust valve, by being provided with plug, the movement of end cover along the axial direction of valve seat can be limited, avoid the phenomenon that end cover is caused by equipment vibration and falls off, guarantee that exhaust valve has higher reliability.In installation, the end of plug can be inserted into limiting slot and limiting through hole directly in the outside of end cover, part of plug remains in the outside of end cover, when disassembling, only need to be pulled out outward by the part of plug located in the outside of end cover, only need simple plug-pull action, dismounting is convenient and fast, reduce installation difficulty and cost, so that the maintenance and replacement of valve become convenient. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is the structure schematic diagram of the exhaust valve provided by the utility model embodiment;

[0020] Figure 2 is a sectional view of the exhaust valve provided by the embodiment of the utility model;

[0021] Figure 3 is a structural schematic view of the end cover provided by the embodiment of the utility model;

[0022] Figure 4 is a structural schematic view of the latch provided by the optional embodiment of the utility model;

[0023] Figure 5 is a sectional view of the cooperation of the latch, the valve seat and the end cover provided by the optional embodiment of the utility model;

[0024] Figure 6 is a structural schematic view of the latch provided by another optional embodiment of the utility model;

[0025] Figure 7 is a sectional view of the cooperation of the latch, the valve seat and the end cover provided by another optional embodiment of the utility model;

[0026] Figure 8 is a structural schematic view of the valve seat provided by the embodiment of the utility model;

[0027] Figure 9 is a structural schematic view of the exhaust assembly in the exhaust state provided by the embodiment of the utility model;

[0028] Figure 10 is a structural schematic view of the exhaust assembly in the sealing state provided by the embodiment of the utility model.

[0029] In the drawings:

[0030] 1, valve shell; 11, valve body; 12, valve cover; 121, mounting hole;

[0031] 2, exhaust assembly; 21, valve seat; 211, exhaust passage; 212, limiting groove; 2121, first limiting surface; 2122, second limiting surface; 22, end cover; 221, limiting through hole; 2211, orifice; 222, anti-skid structure; 223, cylinder part; 224, cover part; 23, latch; 231, limiting part; 2311, arc edge; 2312, straight line edge; 232, connecting part; 24, sealing gasket; 25, plugging piece; 251, valve needle; 252, sealing plug; 253, elastic piece; 26, first sealing piece; 27, second sealing piece;

[0032] 3, float assembly; 4, connecting seat; 5, return seat; 51, air inlet passage; 52, air inlet hole; 53, protruding structure; 6, return piece; 7, third sealing piece. DETAILED DESCRIPTION

[0033] The utility model will be further explained in detail below in combination with the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the utility model, and not to limit the utility model. In addition, it should be noted that, in order to facilitate the description, only the part related to the utility model is shown in the drawings, not all structures.

[0034] In the description of the utility model, unless otherwise explicitly specified and limited, the terms "connected", "connected", "fixed" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated, it can be mechanically connected, or it can be electrically connected, it can be directly connected, or it can be indirectly connected through an intermediate medium, it can be the communication between two elements or the interaction between two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0035] In the utility model, unless otherwise explicitly specified and limited, the first feature is "on" or "below" the second feature, which can include direct contact between the first and second features, or indirect contact between the first and second features through another feature between them. Moreover, the first feature "on", "above" and "above" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0036] In the description of the embodiment, the terms "up", "down", "right", etc. orientation or position relationship is based on the orientation or position relationship shown in the drawings, only for the convenience of description and simplification of operation, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore cannot be understood as a limitation on the utility model. In addition, the terms "first", "second" are only used to distinguish in the description, and have no special meaning.

[0037] As Figure 1 And Figure 2As shown, the embodiment provides an exhaust valve, which comprises a valve shell 1 and an exhaust assembly 2, the valve shell 1 has a mounting hole 121, the exhaust assembly 2 comprises a valve seat 21 and an end cover 22, the valve seat 21 is sealingly installed at the mounting hole 121, the valve seat 21 is provided with an exhaust passage 211, the end cover 22 is movably sleeved on one end of the valve seat 21 outside the valve shell 1 to block or open the outlet of the exhaust passage 211, the exhaust assembly 2 further comprises a plug 23, the outer side wall of the valve seat 21 is provided with a limiting groove 212 along the circumference thereof, the outer side wall of the end cover 22 is provided with a limiting through hole 221, and part of the plug 23 is accommodated in the limiting groove 212 and the limiting through hole 221, and part of the plug 23 is located outside the end cover 22.

[0038] By arranging the plug 23, the axial movement of the end cover 22 along the valve seat 21 can be limited, so as to avoid the phenomenon that the end cover 22 is shaken off due to equipment vibration, and the reliability of the exhaust valve is ensured. Figure 1 When installing, one end of the plug 23 can be directly inserted into the limiting groove 212 and the limiting through hole 221 outside the end cover 22, and part of the plug 23 remains outside the end cover 22, and when disassembling, only the part of the plug 23 outside the end cover 22 needs to be pulled out, so that only a simple plug-in and pull-out action is needed, and the disassembly and assembly are convenient and fast, the installation difficulty and cost are reduced, the maintenance and replacement of the valve are facilitated, and the time and labor cost are reduced.

[0039] Specifically, in the embodiment, as shown in Figure 3 and Figure 4 , the plug 23 is U-shaped and comprises two limiting portions 231 and a connecting portion 232 connected between the two limiting portions 231, the outer side wall of the end cover 22 is provided with two limiting through holes 221 on two opposite sides, the limiting groove 212 is annular, and part of each limiting portion 231 is accommodated in the limiting groove 212 and the corresponding limiting through hole 221, and the connecting portion 232 is located outside the end cover 22. By arranging the U-shaped plug 23, the plug 23 can be tightly held on the end cover 22 and the valve seat 21, and be in the state as shown in Figure 1 , so that the end cover 22 is uniformly stressed, the stable axial limiting effect between the end cover 22 and the valve seat 21 is ensured, the structure is simple, and the connecting portion 232 can serve as a force application position when the plug 23 is pulled out, so that the disassembly and assembly are convenient and fast.

[0040] In the embodiment, as shown in Figures 3 to 5As shown, the limiting portion 231 is linear, and the limiting through hole 221 is a linear hole matched with the limiting portion 231. Specifically, the limiting through hole 221 is a linear hole formed on the outer side wall of the end cover 22, which is cut inward from the edge of the end cover 22, and the extending direction of the linear hole is perpendicular to the axis of the end cover 22, which is convenient to process. The hole bottom of the limiting through hole 221 has an aperture 2211, and part of the groove bottom of the limiting groove 212 passes through the aperture 2211 and is located in the limiting through hole 221, so that the middle region of the limiting through hole 221 is in coincident communication with the part of the limiting groove 212, and when the pin 23 is tightly held in the limiting through hole 221, part of the limiting portion 231 is located in the limiting through hole 221 and the limiting groove 212 at the same time, thereby realizing the axial limiting action between the end cover 22 and the valve seat 21, which is convenient to install.

[0041] In another alternative embodiment, as shown in Figure 3 、 Figure 6 and Figure 7 , the inner side of the limiting portion 231 includes a circular arc edge 2311 and linear edges 2312 connected to both ends of the circular arc edge 2311, and the limiting through hole 221 is a linear hole, which is cut inward from the edge of the end cover 22, and the extending direction of the linear hole is perpendicular to the axis of the end cover 22, which is convenient to process. The hole bottom of the limiting through hole 221 has an aperture 2211, and part of the groove bottom of the limiting groove 212 passes through the aperture 2211 and is located in the limiting through hole 221, so that the middle region of the limiting through hole 221 is in coincident communication with the part of the limiting groove 212, and when the pin 23 is tightly held in the limiting through hole 221, part of the limiting portion 231 is located in the limiting through hole 221 and the limiting groove 212 at the same time, the circular arc edge 2311 of the limiting portion 231 matches with the groove bottom of the limiting groove 212, and the linear edge 2312 matches with the hole bottom of the limiting through hole 221, which can also realize the axial limiting action between the end cover 22 and the valve seat 21.

[0042] In the embodiment, the end cover 22 is threadedly connected with the valve seat 21, and the inner wall of the end cover 22 is provided with an internal thread, and the outer wall of the valve seat 21 is provided with an external thread matched with the internal thread. The connection between the end cover 22 and the valve seat 21 is realized through the internal thread and the external thread, and the operator only needs to realize the movement of the end cover 22 along the axial direction of the valve seat 21 through a simple screwing action, so as to switch the end cover 22 between the position of plugging the outlet of the exhaust passage 211 and the position of opening the outlet of the exhaust passage 211, and the end cover 22 and the valve seat 21 can be locked at any position through the thread connection.

[0043] Further, as shown in Figure 2As shown, the inner side of the end cover 22 towards the position of the exhaust passage 211 is provided with a sealing gasket 24 for sealing the outlet of the exhaust passage 211. The sealing gasket 24 can be installed on the inner side of the bottom of the end cover 22 by means of adhesion or by means of a fixing groove opened on the bottom of the end cover 22, so as to ensure that the sealing gasket 24 can move synchronously with the end cover 22 when the end cover 22 moves along the axial direction of the valve seat 21. The sealing gasket 24 can be made of rubber material and has a certain elasticity. By screwing the end cover 22, the sealing gasket 24 is deformed by extrusion, so as to form a good sealing effect.

[0044] As shown in FIG. 1, when the end cover 22 is located at the position of blocking the outlet of the exhaust passage 211, the sealing gasket 24 is sealed to the outlet of the exhaust passage 211. By screwing the end cover 22, the sealing gasket 24 is pressed on the end surface of the valve seat 21, so as to achieve a good sealing effect. Figure 2 As shown in FIG. 1, when the end cover 22 is located at the position of blocking the outlet of the exhaust passage 211, the sealing gasket 24 is sealed to the outlet of the exhaust passage 211. By screwing the end cover 22, the sealing gasket 24 is pressed on the end surface of the valve seat 21, so as to achieve a good sealing effect. Figure 7 As shown in FIG. 1, when the end cover 22 is located at the position of blocking the outlet of the exhaust passage 211, the sealing gasket 24 is sealed to the outlet of the exhaust passage 211. By screwing the end cover 22, the sealing gasket 24 is pressed on the end surface of the valve seat 21, so as to achieve a good sealing effect.

[0045] In the prior art, the end cover 22 is only connected with the valve seat 21 through threads. When the exhaust valve exhausts, the end cover 22 needs to be loosened. Since there is no fixed soft connection mode, the end cover 22 is easy to fall off and be lost, which causes the exhaust valve to fail to block the exhaust hole when the exhaust valve fails, thereby causing problems such as water leakage.

[0046] In order to solve the above problems, in the embodiment, as shown in FIG. 1, the width of the limiting groove 212 along the axial direction is greater than the size of the plug 23 along the axial direction of the valve seat 21. It should be noted that for the plug 23 shown in FIG. 1, the size of the plug 23 along the axial direction of the valve seat 21 refers to the diameter of the plug 23, and for the plug 23 shown in FIG. 2, the size of the plug 23 along the axial direction of the valve seat 21 refers to the thickness size of the plug 23 along the axial direction of the valve seat 21. Figure 9 Figure 4 Figure 5 Thus, when the end cover 22 is switched between the position of blocking the outlet of the exhaust passage 211 and the position of opening the outlet of the exhaust passage 211, the plug 23 can always be located in the limiting groove 212 and the limiting through hole 221, so that the end cover 22 does not separate from the valve seat 21, and the end cover 22 is prevented from falling off and being lost.

[0047] Specifically, as shown in FIG. 1 and FIG. 2, Figure 8 and Figure 9 ​​As shown, the end cover 22 is a one-piece structure, including a barrel portion 223 sleeved on the outer periphery of the valve seat 21 and a cover portion 224 blocking one end of the barrel portion 223, and the limiting groove 212 has a first limiting surface 2121 at the end close to the cover portion 224. The latch 23 can abut against the first limiting surface 2121 when the end cover 22 opens the outlet of the exhaust passage 211. When the end cover 22 is loosened for exhaust, the latch 23 moves backward with the end cover 22 until the latch 23 is limited at the first limiting surface 2121, which can ensure that the end cover 22 does not separate from the valve seat 21 during exhaust, preventing the end cover 22 from falling off.

[0048] Further, as shown in Figure 8 and Figure 10 , the limiting groove 212 also has a second limiting surface 2122 opposite the first limiting surface 2121, and the latch 23 can abut against the second limiting surface 2122 when the sealing gasket 24 seals the outlet of the exhaust passage 211. When the end cover 22 is tightened for sealing, the latch 23 moves forward with the end cover 22 until the latch 23 is limited at the second limiting surface 2122, which can prevent the end cover 22 from being over-tightened, avoiding damage and failure of the sealing gasket 24 due to over-tightening of the valve seat 21.

[0049] In the present embodiment, as shown in Figure 3 , an anti-slip structure 222 is arranged on the outer periphery of the end cover 22, which can play an anti-slip role when the end cover 22 is screwed, improving the screwing efficiency. In the present embodiment, the anti-slip structure 222 is a dense protrusion formed on the outer periphery of the end cover 22. In other embodiments, the anti-slip structure 222 can also be an anti-slip pattern arranged on the outer periphery of the end cover 22, or a rubber pad or other component sleeved on the end cover 22, which is not specifically limited here.

[0050] Further, as shown in Figure 2 , the mounting hole 121 is a stepped hole, the large-diameter end of the stepped hole is outwardly arranged, the valve seat 21 is threadedly connected with the large-diameter end of the stepped hole, a first sealing member 26 is arranged between the stepped surface of the stepped hole and the valve seat 21 to ensure the sealed connection between the valve seat 21 and the mounting hole 121, and a second sealing member 27 is arranged between the small-diameter end of the stepped hole and the valve seat 21 to further improve the sealing effect between the valve seat 21 and the mounting hole 121, avoiding leakage of liquid in the valve housing 1 from between the valve seat 21 and the mounting hole 121. In the present embodiment, the valve seat 21 is further provided with accommodating grooves for accommodating the first sealing member 26 and the second sealing member 27 respectively, to stably fix the first sealing member 26 and the second sealing member 27. The first sealing member 26 and the second sealing member 27 can each be an O-shaped sealing ring.

[0051] As shown in Figure 1 and Figure 2 , the mounting hole 121 is a stepped hole, the large-diameter end of the stepped hole is outwardly arranged, the valve seat 21 is threadedly connected with the large-diameter end of the stepped hole, a first sealing member 26 is arranged between the stepped surface of the stepped hole and the valve seat 21 to ensure the sealed connection between the valve seat 21 and the mounting hole 121, and a second sealing member 27 is arranged between the small-diameter end of the stepped hole and the valve seat 21 to further improve the sealing effect between the valve seat 21 and the mounting hole 121, avoiding leakage of liquid in the valve housing 1 from between the valve seat 21 and the mounting hole 121. In the present embodiment, the valve seat 21 is further provided with accommodating grooves for accommodating the first sealing member 26 and the second sealing member 27 respectively, to stably fix the first sealing member 26 and the second sealing member 27. The first sealing member 26 and the second sealing member 27 can each be an O-shaped sealing ring.As shown, the valve housing 1 comprises a valve body 11 and a valve cover 12 mounted on the valve body 11, and a mounting hole 121 is formed on the valve cover 12. Optionally, the valve cover 12 is threadedly connected to the valve body 11, and a third sealing member 7 is arranged between the valve cover 12 and the valve body 11 to achieve a sealed connection therebetween, thereby preventing liquid in the pipeline from leaking from the gap between the valve cover 12 and the valve body 11.

[0052] Further, as shown in the drawings, Figure 2 The exhaust assembly 2 further comprises a blocking member 25 arranged in the valve housing 1, the blocking member 25 is movably arranged at the inlet of the exhaust passage 211 and can be switched between a position for blocking the inlet of the exhaust passage 211 and a position for opening the inlet of the exhaust passage 211. When the gas in the valve housing 1 needs to be exhausted, the blocking member 25 can be moved to the opening position to connect the exhaust passage 211 and the valve cavity of the valve housing 1, so that the gas in the valve cavity is exhausted from the exhaust hole through the exhaust passage 211. When the gas in the valve cavity is exhausted, the blocking member 25 can be moved to the blocking position to cut off the exhaust passage 211 and the valve cavity, thereby preventing the liquid in the pipeline from leaking through the exhaust passage 211.

[0053] Specifically, as shown in the drawings, Figure 2 The exhaust valve further comprises a float assembly 3 movably arranged in the valve cavity of the valve housing 1. The blocking member 25 comprises a valve needle 251, a sealing plug 252 and an elastic member 253, the two ends of the elastic member 253 are connected to the valve needle 251 and the valve seat 21 respectively, the end of the valve needle 251 towards the valve seat 21 is connected with the sealing plug 252, and the end of the valve needle 251 away from the valve seat 21 abuts against the float assembly 3 and can be switched between the blocking position and the opening position under the floating action of the float assembly 3.

[0054] When the gas in the pipeline overflows, the gas will gather at the highest point of the pipeline (i.e. the position where the exhaust valve is arranged) along with the flow of the liquid, and then flow into the valve cavity of the valve housing 1 and pass through the gap between the valve cavity and the float assembly 3 to the upper side of the float assembly 3. As the gas above the float assembly 3 increases, the pressure increases, and the liquid level in the valve cavity decreases, so the float assembly 3 floats downward with the decrease of the liquid level, thereby driving the valve needle 251 and the sealing plug 252 connected thereto to rotate relative to the valve seat 21, so as to switch to the opening position, and the gas above the float assembly 3 can be exhausted from the exhaust hole through the exhaust passage 211. When the gas is exhausted, the liquid level in the valve cavity rises, and the float assembly 3 rises under the action of the buoyancy, and the valve needle 251 can be reset under the elastic action of the elastic member 253 to switch to the blocking position, thereby cutting off the exhaust passage 211 and the valve cavity, and preventing the liquid in the pipeline from leaking through the exhaust passage 211.

[0055] It should be noted that the float assembly 3 is a relatively mature technology in the prior art, and the specific structure of the float assembly 3 will not be described again in this embodiment.

[0056] In this embodiment, the elastic member 253 is a spring, the spring is sleeved outside the valve needle 251 and the valve seat 21, and the two ends of the spring are connected to the valve needle 251 and the valve seat 21 respectively, for providing a restoring force for the valve needle 251 when the float assembly 3 rises, thereby driving the valve needle 251 to reset after the exhaust is completed, so that the sealing plug 252 is tightly attached to the valve seat 21, and the inlet of the exhaust passage 211 is effectively blocked.

[0057] To realize the stable connection between the sealing plug 252 and the valve needle 251, a groove is arranged at one end of the valve needle 251 facing the valve seat 21, and the sealing plug 252 is partially accommodated in the groove and is in interference fit with the groove, so as to avoid the sealing plug 252 from falling off the valve needle 251.

[0058] Further, as shown in the figure, Figure 2 The exhaust valve further includes a connecting seat 4, a restoring seat 5 and a restoring member 6. The connecting seat 4 is sleeved at the bottom of the valve body 11, the restoring seat 5 is arranged in the connecting seat 4 and can abut against the bottom of the valve body 11, the restoring seat 5 is provided with an air inlet passage 51 communicating with the valve cavity of the valve shell 1, the side wall of the restoring seat 5 is provided with an air inlet hole 52 communicating with the air inlet passage 51, the top of the restoring seat 5 is outwardly provided with a protruding structure 53, the restoring member 6 is sleeved outside the restoring seat 5, the top end of the restoring member 6 abuts against the protruding structure 53, and the bottom end of the restoring member 6 abuts against the connecting seat 4. Optionally, the restoring member 6 is a spring, the restoring force of the spring is large, and the spring is convenient to obtain, thereby reducing the processing cost.

[0059] When the exhaust valve needs to be used on the corresponding equipment, the connecting seat 4 is used to connect the equipment mounting position, the restoring seat 5 can partially extend into the pipeline, and the gas in the pipeline can flow into the air inlet passage 51 from the air inlet hole 52 arranged on the restoring seat 5, and then into the valve cavity of the valve shell 1. When the exhaust valve needs to be disassembled from the connecting seat 4 due to failure, the restoring seat 5 can move upward under the elastic action of the restoring member 6, so that the restoring seat 5 is separated from the pipeline, thereby avoiding the leakage of the liquid in the pipeline from the restoring seat 5 and the connecting seat 4.

[0060] In this embodiment, the connecting seat 4 is threadedly connected to the valve body 11, and a third sealing member 7 is further arranged between the connecting seat 4 and the valve body 11 to realize the sealed connection between the connecting seat 4 and the valve body 11, thereby avoiding the leakage of the liquid in the pipeline from the gap between the connecting seat 4 and the valve body 11.

[0061] Obviously, the above embodiments of the present application are merely examples for clearly illustrating the present application, and are not intended to limit the implementation modes of the present application. For those skilled in the art, various obvious changes, re-adjustments and replacements can be made without departing from the protection scope of the present application. Here, it is not necessary and also impossible to enumerate all the implementation modes. Any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application claim.

Claims

1. An exhaust valve, comprising a valve housing (1) having a mounting hole (121) and an exhaust assembly (2) comprising a valve seat (21) and an end cover (22), the valve seat (21) being sealingly mounted at the mounting hole (121), an exhaust passage (211) being provided in the valve seat (21), the end cover (22) being movably sleeved at an end of the valve seat (21) located outside the valve housing (1) to block or open an outlet of the exhaust passage (211), characterized in that, The exhaust assembly (2) further comprises a latch (23), an outer side wall of the valve seat (21) is provided with a limiting groove (212) along a circumference thereof, the end cover (22) is provided with a limiting through hole (221), and part of the latch (23) is accommodated in the limiting groove (212) and the limiting through hole (221) at the same time.

2. The exhaust valve according to claim 1, characterized in that, The latch (23) is in a U shape, comprising two limiting portions (231) and a connecting portion (232) connected between the two limiting portions (231), the outer side wall of the end cover (22) is provided with the limiting through hole (221) on each of two opposite sides, part of each limiting portion (231) is accommodated in the limiting groove (212) and the corresponding limiting through hole (221) respectively, and the connecting portion (232) is located outside the end cover (22).

3. The exhaust valve of claim 2, wherein, The limiting portion (231) is in a straight line shape, and the limiting through hole (221) is in a straight line shape hole matched with the limiting portion (231).

4. The exhaust valve of claim 2, wherein, The inner side of the limiting portion (231) comprises a circular arc side (2311) and a straight line side (2312) connected to two ends of the circular arc side (2311), the limiting through hole (221) is in a straight line shape hole, the hole bottom of the limiting through hole (221) has a hole opening (2211), part of the groove bottom of the limiting groove (212) passes through the hole opening (2211) and is located in the limiting through hole (221), the circular arc side (2311) is matched with the groove bottom of the limiting groove (212), and the straight line side (2312) is matched with the hole bottom of the limiting through hole (221).

5. The exhaust valve of claim 1, wherein, The limiting groove (212) has an axial width greater than a size of the latch (23) along an axial direction of the valve seat (21).

6. The exhaust valve of claim 5, wherein, The end cover (22) comprises a cylinder portion (223) sleeved on an outer periphery of the valve seat (21) and a cover portion (224) blocked at one end of the cylinder portion (223), one end of the limiting groove (212) close to the cover portion (224) has a first limiting surface (2121), and the latch (23) can abut against the first limiting surface (2121) when the end cover (22) opens an outlet of the exhaust passage (211).

7. The exhaust valve of claim 6, wherein, An inner side of the end cover (22) is provided with a sealing gasket (24) towards a position of the exhaust passage (211), and the sealing gasket (24) is used for sealing the outlet of the exhaust passage (211).

8. The exhaust valve of claim 7, wherein, The limiting groove (212) further has a second limiting surface (2122) opposite to the first limiting surface (2121), and the latch (23) can abut against the second limiting surface (2122) when the sealing gasket (24) seals the outlet of the exhaust passage (211).

9. The exhaust valve of claim 1, wherein, An outer peripheral surface of the end cover (22) is provided with an anti-skid structure (222).

10. The exhaust valve of claim 1, wherein, The mounting hole (121) is a stepped hole, an outer end of the stepped hole is provided, a first sealing member (26) is arranged between a stepped surface of the stepped hole and the valve seat (21), and a second sealing member (27) is arranged between a small-diameter end of the stepped hole and the valve seat (21).

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