Manual exhaust valve

Abstract

The utility model relates to a manual exhaust valve which comprises a valve body, a valve rod, a sealing disc located in a gas path channel and used for sealing or opening the inner end of a gas path outlet, and a shifting rod formed on the sealing disc, penetrating through the gas path outlet and extending out of the gas path channel. The valve element is arranged to abut against the sealing disc under the acting force of the first reset piece. And the elastic washer is fixedly arranged on the driving lever in a sleeving manner, the elastic washer has elasticity, and the elastic washer is arranged to generate elastic deformation after being pressed, and is reset and attached to the outer wall of the gas path channel after the pressure is relieved so as to seal the outer end of the gas path outlet. According to the embodiment, the elastic washer is arranged at the outer end of the gas path outlet, and when the gas flow outlet of the gas path channel is in an open state, gas can flow out smoothly in one direction; when the airflow outlet is in a closed state, the elastic gasket can seal the air channel outlet, and external pollutants are prevented from entering the airflow channel.

Description

Technical Field

[0001] The utility model relates to the technical field of exhaust valves, in particular to a manual exhaust valve. Background Art

[0002] The Type 120 semi-automatic relief valve for railway freight cars, also known as a brake valve or exhaust valve, is used to manually release pressurized air from the brake cylinder to brake the vehicle. Existing brake valves have exhaust ports directly exposed to the external environment. During vehicle operation, rainwater, antifreeze spray, and dust suppressant can enter the exhaust valve through the exhaust port, causing internal corrosion and even failure.

[0003] The utility model provides a manual exhaust valve with a sealing structure, aiming to solve the above problems. Utility Model Content

[0004] The utility model provides a manual exhaust valve with a sealing structure, which can prevent external rainwater, dust suppressant, dust-proof liquid and the like from entering the interior of the exhaust valve.

[0005] The utility model provides a manual exhaust valve, which includes:

[0006] The valve body is provided with an air passage and an air outlet;

[0007] The valve stem includes a sealing disk located in the gas passage and used to seal or open the inner end of the gas outlet, and a lever formed on the sealing disk and extending through the gas outlet to the outside of the gas passage;

[0008] a valve core movably disposed in the gas passage, the valve core being connected to the first return member and being subjected to a force applied by the first return member tending to approach the gas passage outlet, the valve core being stopped against the sealing disk under the force of the first return member; and

[0009] The elastic washer is fixed on the shift rod. The elastic washer is elastic and is configured to undergo elastic deformation after being compressed. After the pressure is released, it returns to the outer wall of the air path to seal the outer end of the air path outlet.

[0010] Specifically, the elastic washer includes:

[0011] The washer body extends along the axial direction of the shift rod and is sleeved on the shift rod;

[0012] The sealing portion is formed on one end of the gasket body close to the air outlet, and the elastic gasket is attached to the outer wall of the air channel through the end surface of the sealing portion to achieve sealing of the outer end of the air outlet.

[0013] Furthermore, the sealing portion is annular, and the inner peripheral wall of the annular sealing portion is integrally connected to one end of the gasket body close to the gas path outlet;

[0014] The axial end surface of the annular sealing portion is matched with the outer wall of the gas path.

[0015] Preferably, the elastic gasket further comprises a positioning portion formed on the gasket body at one end away from the sealing portion;

[0016] The shift rod is provided with a limiting step matched with the positioning portion for axially limiting the elastic washer.

[0017] Preferably, the valve stem further comprises:

[0018] The handle is arranged on an end of the shift rod away from the sealing disk, the elastic washer is located between the sealing disk and the handle, and the limit step is formed on the axial end surface of the handle facing the elastic washer.

[0019] Optionally, the valve core is arranged in the air passage so as to be movable along the axial direction of the air passage, and the air passage outlet is arranged on an axial end wall of the air passage;

[0020] The valve core stops at the end surface of the sealing disk away from the gas outlet, and the end surface of the sealing disk facing the gas outlet can be fitted on the inner end wall of the gas channel to achieve sealing of the gas outlet by the sealing disk.

[0021] Furthermore, the valve core includes:

[0022] a core body, mounted and connected to the first restoring member;

[0023] A stop portion is formed on one side of the core body facing the gas path outlet and is used for stopping on the sealing disk.

[0024] Furthermore, the first return member is a compression spring, one end of which is fixedly mounted on the inner wall of the air passage, and the other end of which is mounted and connected to the core body to apply a force to the core body tending to approach the air passage outlet.

[0025] Optionally, an air inlet is further provided on the valve body, and the manual exhaust valve further includes a plug located outside the air passage and used for sealing or opening the air inlet.

[0026] Preferably, the valve core comprises:

[0027] a core body, mounted and connected to the first restoring member;

[0028] A push rod is formed on the side of the core body facing the air path inlet, and is used to extend out of the air path inlet to stop on the plug. When the valve core moves toward the air path inlet driven by the sealing disk, the push rod extends out of the air path inlet and stops on the plug to drive the plug to open the air path inlet.

[0029] Optionally, the manual exhaust valve further comprises:

[0030] The second reset member is configured to be connected to the plug and exert a force on the plug to move it closer to the gas path inlet. Under the action of the second reset member, the plug fits on the outer wall of the gas path inlet to seal the gas path inlet.

[0031] Optionally, a working chamber is further provided in the valve body, and the plug can realize the connection and disconnection between the working chamber and the air path by opening or sealing the air path inlet.

[0032] Furthermore, the number of the working chambers is at least two, and the number of the gas path inlet, the plug, and the ejector rod is correspondingly at least two.

[0033] Preferably, the working chamber is a pressure-reducing air cylinder and an auxiliary air cylinder.

[0034] Compared with the prior art, the advantages of the present invention are:

[0035] 1. The manual exhaust valve in this embodiment is provided with an elastic gasket at the outer end of the air outlet. When the air outlet of the air channel is in the open state, the gas is ensured to flow out smoothly in one direction, preventing external pollutants from flowing back into the air channel through the air outlet; when the air outlet is in the closed state, the elastic gasket can seal the air outlet, preventing external pollutants from entering the air channel.

[0036] Specifically, the exhaust process of the manual exhaust valve: after operating the lever to rotate and tilt it, the lever drives the sealing disk to displace or tilt, so as to release the seal of the sealing disk on the inner end of the air outlet. The high-pressure gas in the air channel flows out from the inner end of the air outlet and forces the elastic gasket to deform outward. The high-pressure gas is discharged into the external atmosphere through the gap between the elastic gasket and the inner end wall of the air outlet.

[0037] The manual exhaust valve is in the closed state: after the operation of the lever is released, the valve core that stops on the sealing disk can drive the sealing disk to reset and fit against the outer end wall of the air outlet under the action of the first reset member to seal the inner end of the air outlet, ensuring that the gas in the air channel cannot be discharged from the air outlet; the elastic gasket is reset under the drive of the lever to seal the outer end of the air outlet.

[0038] 2. The basic working principle of the manual exhaust valve in this embodiment is as follows:

[0039] When exhausting, the lever is operated to rotate and tilt, which drives the sealing disc to move or tilt, so that the sealing disc opens the inner end of the gas outlet. At the same time, the sealing disc drives the valve core abutting on it to move axially along the gas channel. The push rod on the valve core extends out of the gas channel inlet and abuts on the plug, thereby driving the plug to open the gas channel inlet, so that the working chamber is connected with the gas channel, and the high-pressure gas in the high-pressure chamber flows into the gas channel and is discharged from the gas outlet. At this time, the gas channel is in an open state.

[0040] After the exhaust is completed, the operation on the shift rod is released, and the valve core is reset by axially moving toward the direction close to the gas outlet under the action of the first reset member, and drives the sealing disk to reset and fit against the outer end wall of the gas outlet to seal the inner end of the gas outlet; after the valve core is reset, the push rod is disengaged from the plug, and the plug is fit against the outer wall of the gas inlet under the action of the second reset member to seal the gas inlet. At this time, the gas channel is in a closed state. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] The present invention will be described in more detail below based on embodiments with reference to the accompanying drawings.

[0042] Figure 1 It is a structural diagram of a manual exhaust valve with the gas outlet in a closed state;

[0043] Figure 2 It is a structural diagram of a manual exhaust valve with the gas outlet in an open state for exhaust;

[0044] Figure 3 It is a structural diagram of the valve stem;

[0045] Figure 4 Schematic diagram of the connection structure between the valve core and the first reset member;

[0046] Reference numerals:

[0047] 1. Valve body; 11. Air passage; 12. Air outlet; 13. Air inlet; 14. Working chamber; 141. Pressure-reducing air cylinder; 142. Auxiliary air cylinder;

[0048] 2. Valve stem; 21. Sealing disk; 22. Lever; 23. Handle; 231. Limit step; 24. Locking pin;

[0049] 3. Valve core; 31. Core body; 32. Stop portion; 33. Ejector rod;

[0050] 4. Elastic gasket; 41. Gasket body; 42. Sealing portion; 43. Positioning portion;

[0051] 5. First reset member; 6. Plug; 7. Second reset member. DETAILED DESCRIPTION

[0052] The present invention will be further described below with reference to the accompanying drawings.

[0053] Example 1

[0054] An embodiment of the utility model provides a manual exhaust valve, which includes a valve body 1 , a valve stem 2 , a valve core 3 and an elastic washer 4 .

[0055] Specifically, the valve body 1 is provided with an air passage 11 and an air outlet 12 .

[0056] The valve stem 2 includes a sealing disc 21 and a lever 22. The sealing disc 21 is located in the gas passage 11 and is used to seal or open the inner end of the gas outlet 12. The lever 22 is formed on the sealing disc 21 and passes through the gas outlet 12 and extends out of the gas passage 11.

[0057] The valve core 3 is movably disposed in the gas passage 11. The valve core 3 is connected to the first return member 5 and is subjected to a force applied by the first return member 5 to move the valve core 3 toward the gas outlet 12. Under the force of the first return member 5, the valve core 3 abuts against the sealing disk 21.

[0058] The elastic washer 4 is sleeved and fixed on the shift rod 22. The elastic washer 4 is elastic and is configured to elastically deform when under pressure, and to return to the outer wall of the air passage 11 to seal the outer end of the air outlet 12 after the pressure is released.

[0059] In this embodiment, the lever 22 can drive the sealing disk 21 to move or tilt after being rotated and tilted, so as to release the seal of the sealing disk 21 on the inner end of the gas outlet 12. The high-pressure gas in the gas channel 11 flows out from the inner end of the gas outlet 12 and forces the elastic gasket 4 to deform outward. The high-pressure gas is discharged into the external atmosphere through the gap between the elastic gasket 4 and the inner end wall of the gas outlet 12.

[0060] When the operation on the lever 22 is released, the valve core 3 resting on the sealing disk 21 can drive the sealing disk 21 to reset and fit against the outer end wall of the gas outlet 12 under the action of the first reset member 5 to seal the inner end of the gas outlet 12, ensuring that the gas in the gas channel 11 cannot be discharged from the gas outlet 12; the elastic gasket 4 is reset under the drive of the lever 22 to seal the outer end of the gas outlet 12.

[0061] This embodiment is provided with an elastic gasket 4, which can ensure the one-way smooth outflow of gas when the air flow outlet of the air path channel 11 is in an open state, thereby preventing external pollutants from flowing back into the air flow channel from the air flow outlet; and can also seal the air path outlet 12 when the air flow outlet is in a closed state, thereby preventing external pollutants from entering the air flow channel.

[0062] The radial dimension of the gas outlet 12 is larger than the radial dimension of the shifting rod 22 and smaller than the radial dimension of the sealing disk 21 .

[0063] The elastic gasket 4 in this embodiment includes a gasket body 41 and a sealing portion 42 .

[0064] The gasket body 41 extends along the axial direction of the shift rod 22 and is sleeved on the shift rod 22; the sealing portion 42 is formed on one end of the gasket body 41 close to the air outlet 12, and the elastic gasket 4 is attached to the outer wall of the air channel 11 through the end face of the sealing portion 42 to achieve sealing of the outer end of the air outlet 12.

[0065] Optionally, the sealing portion 42 is annular, and the inner circumferential wall of the annular sealing portion 42 is integrally connected to one end of the gasket body 41 close to the air outlet 12 ; the axial end surface of the annular sealing portion 42 cooperates with the outer wall of the air passage 11 .

[0066] The elastic washer 4 further includes a positioning portion 43 formed on the washer body 41 at one end away from the sealing portion 42 ; the lever 22 is provided with a limiting step 231 cooperating with the positioning portion 43 for axially limiting the elastic washer 4 .

[0067] Preferably, the valve stem 2 also includes a handle 23, which is arranged on the end of the lever 22 away from the sealing disk 21, the elastic gasket 4 is located between the sealing disk 21 and the handle 23, and the limit step 231 is formed on the axial end surface of the handle 23 facing the elastic gasket 4.

[0068] The handle 23 and the lever 22 are fixedly mounted by a locking pin 24. Pin holes are correspondingly provided on the handle 23 and the lever 22. A cotter pin passes through the pin holes on the handle 23 and the lever 22 to connect the handle 23 and the lever 22. Preferably, the locking pin 24 is a cotter pin.

[0069] Example 2

[0070] The manual exhaust valve in this embodiment is basically the same as the manual exhaust valve in Example 1, with the difference that the valve core 3 in this embodiment is axially movable along the air path 11 in the air path 11, and the air path outlet 12 is provided on an axial end wall of the air path 11; the valve core 3 abuts against the end face of the sealing disk 21 facing away from the air path outlet 12, and the end face of the sealing disk 21 facing the air path outlet 12 can be fitted on the inner end wall of the air path 11 to achieve sealing of the air path outlet 12 by the sealing disk 21.

[0071] The valve core 3 in this embodiment includes a core body 31 and a stop portion 32 .

[0072] The core body 31 is installed and connected to the first return member 5, which is a compression spring. One end of the compression spring is fixedly installed on the inner wall of the air path channel 11, and the other end of the compression spring is installed and connected to the core body 31 to apply a force on the core body 31 to move it closer to the air path outlet 12.

[0073] The abutment portion 32 is formed on the side of the core 31 facing the gas outlet 12, and is used to abut against the sealing disk 21. Preferably, the abutment portion 32 is a protruding structure formed on the core 31.

[0074] Example 3

[0075] This embodiment is basically the same as the manual exhaust valve in Embodiment 1 and Embodiment 2, except that an air inlet 13 is further provided on the valve body 1 in this embodiment, and the manual exhaust valve further includes a plug 6 located outside the air passage 11 and used to seal or open the air inlet 13.

[0076] The gas inlet 13 and the gas outlet 12 are respectively arranged at two axial ends of the gas channel 11 ; the axial length of the valve core 3 is smaller than the distance between the gas inlet 13 and the gas outlet 12 .

[0077] The valve core 3 includes a core body 31 and a push rod 33. The core body 31 is mounted and connected to the first return member 5. The push rod 33 is formed on the side of the core body 31 facing the gas inlet 13 and is used to extend out of the gas inlet 13 and abut against the plug 6. When the valve core 3 moves toward the gas inlet 13 under the drive of the sealing disk 21, the push rod 33 extends out of the gas inlet 13 and abuts against the plug 6, driving the plug 6 to open the gas inlet 13.

[0078] The manual exhaust valve also includes a second reset member 7. The second reset member 7 is configured to be connected to the plug 6 and exert a force on the plug 6 to move it closer to the air path inlet 13. Under the action of the second reset member 7, the plug 6 is attached to the outer wall of the air path inlet 13 to seal the air path inlet 13.

[0079] A working chamber 14 is also provided within the valve body 1. The plug 6 can open or seal the air inlet 13 to connect and disconnect the working chamber 14 from the air passage 11. A second return element 7 is a compression spring disposed within the working chamber 14. One end of the second return element 7 is fixed to the inner wall of the working chamber 14, and the other end is mounted and connected to the plug 6.

[0080] There are at least two working chambers 14 , and correspondingly there are at least two gas inlet 13 , plug 6 , and ejector pin 33 . At least two ejector pins 33 are arranged in parallel on the core 31 .

[0081] The working chamber 14 comprises a pressure reducing air cylinder 141 and an auxiliary air cylinder 142 .

[0082] The basic working principle of the manual exhaust valve in this embodiment is as follows:

[0083] When exhausting, the lever 22 is operated to rotate and tilt, and the lever 22 drives the sealing disc 21 to move or tilt, so that the sealing disc 21 opens the inner end of the gas outlet 12. At the same time, the sealing disc 21 drives the valve core 3 abutting thereon to move axially along the gas passage 11. The push rod 33 on the valve core 3 extends out of the gas inlet 13 and abuts on the plug 6, thereby driving the plug 6 to open the gas inlet 13, so that the working chamber 14 is connected with the gas passage 11, and the high-pressure gas in the high-pressure chamber flows into the gas passage 11 and is discharged from the gas outlet 12. At this time, the gas passage 11 is in an open state;

[0084] After the exhaust is completed, the operation on the shift rod 22 is released, and the valve core 3 is axially moved and reset in the direction close to the gas outlet 12 under the action of the first reset member 5, and drives the sealing disk 21 to reset and fit against the outer end wall of the gas outlet 12 to seal the inner end of the gas outlet 12; after the valve core 3 is reset, the push rod 33 is disengaged from the plug 6, and the plug 6 is fitted on the outer wall of the gas inlet 13 under the action of the second reset member 7 to seal the gas inlet 13. At this time, the gas path 11 is in a closed state.

[0085] While the present invention has been described with reference to preferred embodiments, various modifications may be made and equivalent components may be substituted without departing from the scope of the present invention. In particular, the various technical features described in the various embodiments may be combined in any manner, provided no structural conflicts exist. The present invention is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions within the scope of the claims.

Claims

1. A manual exhaust valve, characterized in that: include: The valve body is provided with an air passage and an air outlet; The valve stem includes a sealing disk located in the gas passage and used to seal or open the inner end of the gas outlet, and a lever formed on the sealing disk and extending through the gas outlet to the outside of the gas passage; A valve core is movably disposed in the gas passage, the valve core being connected to the first return member and being subjected to a force applied by the first return member tending to approach the gas passage outlet, and the valve core is stopped against the sealing disk under the force of the first return member; as well as The elastic washer is fixed on the shift rod. The elastic washer is elastic and is configured to undergo elastic deformation after being compressed. After the pressure is released, it returns to the outer wall of the air path to seal the outer end of the air path outlet.

2. The manual exhaust valve according to claim 1, characterized in that: The elastic washer comprises: The washer body extends along the axial direction of the shift rod and is sleeved on the shift rod; The sealing portion is formed on one end of the gasket body close to the air outlet, and the elastic gasket is attached to the outer wall of the air channel through the end surface of the sealing portion to achieve sealing of the outer end of the air outlet.

3. The manual exhaust valve according to claim 2, characterized in that: The sealing portion is annular, and the inner peripheral wall of the annular sealing portion is integrally connected to one end of the gasket body close to the gas path outlet; The axial end surface of the annular sealing portion is matched with the outer wall of the gas path.

4. The manual exhaust valve according to claim 2 or 3, characterized in that: The elastic gasket further includes a positioning portion formed on the gasket body at one end away from the sealing portion; The shift rod is provided with a limiting step matched with the positioning portion for axially limiting the elastic washer.

5. The manual exhaust valve according to claim 4, characterized in that: The valve stem further comprises: The handle is arranged on an end of the shift rod away from the sealing disk, the elastic washer is located between the sealing disk and the handle, and the limit step is formed on the axial end surface of the handle facing the elastic washer.

6. The manual exhaust valve according to claim 1, characterized in that: The valve core is arranged in the air passage so as to be movable along the axial direction of the air passage, and the air passage outlet is arranged on an axial end wall of the air passage; The valve core stops at the end surface of the sealing disk away from the gas outlet, and the end surface of the sealing disk facing the gas outlet can be fitted on the inner end wall of the gas channel to achieve sealing of the gas outlet by the sealing disk.

7. The manual exhaust valve according to claim 6, characterized in that: The valve core comprises: a core body, mounted and connected to the first restoring member; A stop portion is formed on one side of the core body facing the gas path outlet and is used for stopping on the sealing disk.

8. The manual exhaust valve according to claim 7, characterized in that: The first restoring member is a compression spring, one end of which is fixedly mounted on the inner wall of the air passage, and the other end of which is mounted and connected to the core body to apply a force to the core body tending to approach the air passage outlet.

9. The manual exhaust valve according to claim 6, characterized in that: The valve body is also provided with an air path inlet, and the manual exhaust valve further comprises a plug located outside the air path channel and used for sealing or opening the air path inlet.

10. The manual exhaust valve according to claim 9, characterized in that: The valve core comprises: a core body, mounted and connected to the first restoring member; A push rod is formed on the side of the core body facing the air path inlet, and is used to extend out of the air path inlet to stop on the plug. When the valve core moves toward the air path inlet driven by the sealing disk, the push rod extends out of the air path inlet and stops on the plug to drive the plug to open the air path inlet.

11. The manual exhaust valve according to claim 9 or 10, characterized in that: The manual exhaust valve also includes: The second reset member is configured to be connected to the plug and exert a force on the plug to move it closer to the gas path inlet. Under the action of the second reset member, the plug fits on the outer wall of the gas path inlet to seal the gas path inlet.

12. The manual exhaust valve according to claim 10, characterized in that: A working chamber is also provided in the valve body, and the plug can realize the connection and disconnection between the working chamber and the air path by opening or sealing the air path inlet.

13. The manual exhaust valve according to claim 12, characterized in that: There are at least two working chambers, and there are correspondingly at least two gas path inlets, plugs, and ejector rods.

14. The manual exhaust valve according to claim 13, characterized in that: The working chamber consists of a pressure-reducing air cylinder and an auxiliary air cylinder.

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