Exhaust valve

Abstract

The utility model discloses an exhaust valve which comprises a valve body, a valve cavity is arranged in the valve body, a rear cover is arranged at the lower end of the valve body, the rear cover is provided with an air inlet communicated with the valve cavity, the valve body is provided with an air outlet and an air outlet which are communicated with the valve cavity, and a valve element piece used for controlling air path switching among the air inlet, the air outlet and the air outlet is movably arranged in the valve cavity. The valve body is sleeved with a heat preservation sleeve, an exhaust channel is formed between the exhaust port and the valve cavity and is in an inverted-L shape, a movable baffle is arranged in the exhaust channel, the upper end of the movable baffle is hinged to the inner wall of the exhaust channel through a pin shaft, and a trace exhaust channel used for communicating the air outlet with the exhaust port is further arranged in the valve body. A trace valve element assembly and a valve hole matched with the trace valve element assembly are movably arranged in the trace exhaust channel, the trace valve element assembly always has the movement trend of blocking the valve hole, the heat preservation sleeve plays a heat preservation effect, and the movable baffle prevents external cold air from entering and is not prone to being troubled by low-temperature freezing.

Description

Technical Field

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

[0002] The exhaust valve is a commonly used device in the water fluid transportation industry to ensure the stability and safety of the pipeline system. During the normal operation of the pipeline system, the exhaust valve plays a vital role. When the fluid flows, air accumulation often occurs due to the pressure change in the pipeline. When the pressure in the pipeline is positive, the exhaust valve can effectively exhaust the air in the pipeline to avoid gas blocking the water flow and ensure the smooth transportation of the fluid. When the pressure in the pipeline decreases and negative pressure occurs, the exhaust valve can quickly inhale air to replenish the air pressure in the pipeline to prevent the pipeline from becoming unstable and damaged due to excessive negative pressure, thereby ensuring the stability and safety of the pipeline system. However, the existing exhaust valve is easily affected by freezing when working in a low temperature environment. When the ambient temperature drops below the freezing point, the components in the exhaust valve are prone to ice, affecting the normal operation of the exhaust valve, and even the exhaust valve body may freeze and crack, thereby causing a water leakage accident. Therefore, it is necessary to improve it. Utility Model Content

[0003] The utility model aims to provide an exhaust valve in view of the defects and shortcomings of the prior art, which has a simple and reasonable structure, is easy to operate, has an insulation cover to keep warm, and a movable baffle to prevent the outside cold air from entering, and is not easily troubled by low temperature freezing.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] ] a valve body, wherein a valve cavity is arranged in the valve body, a back cover is arranged at the lower end of the valve body, the back cover is provided with an air inlet connected to the valve cavity, the valve body is provided with an exhaust port and an exhaust port respectively connected to the valve cavity, a valve core member for controlling the switching of air paths among the air inlet, the exhaust port and the exhaust port is movably arranged in the valve cavity, an insulation sleeve is arranged at the outer sleeve of the valve body, an exhaust channel is formed between the exhaust port and the valve cavity, the exhaust channel is arranged in an "inverted L-shape", a movable baffle is arranged in the exhaust channel, the upper end of the movable baffle is hinged to the inner wall of the exhaust channel by a pin shaft, a micro exhaust channel for connecting the air outlet and the exhaust port is further arranged in the valve body, a micro valve core assembly and a valve hole matched with the micro valve core assembly are movably arranged in the micro exhaust channel, and the micro valve core assembly always has a movement tendency to block the valve hole.

[0006] Furthermore, the micro-valve core assembly includes a spring, a spring seat and a steel ball. The spring seat is fixedly connected to the valve body. An exhaust hole is axially provided at the center of the spring seat. The micro-exhaust channel is connected to the exhaust port through the exhaust hole. A spring is provided between the spring seat and the steel ball. The spring always has a movement tendency to make the steel ball block the valve hole. The micro-exhaust channel is connected to the outlet through the valve hole.

[0007] Furthermore, the upper end of the rear cover extends into the valve cavity and is provided with a first conical expansion opening, and the valve core member is provided with a sealing lip that seals with the first conical expansion opening.

[0008] Furthermore, a guide rod is fixedly provided at the lower end of the valve core member, and the rear cover is provided with a guide hole matched with the guide rod, and the guide hole is respectively communicated with the air inlet and the valve cavity.

[0009] Furthermore, a second conical expansion opening is provided at one end of the guide hole close to the valve cavity.

[0010] Furthermore, the valve body is provided with an extension portion that abuts against the valve core member.

[0011] Furthermore, a sealing ring is disposed between the rear cover and the valve body.

[0012] Furthermore, the valve core member is made of elastic material.

[0013] Furthermore, the trace exhaust channel is arranged in an "L-shape".

[0014] The beneficial effects of the utility model are as follows: in order to ensure the normal operation of the exhaust valve at low temperatures, an insulating sleeve is provided on the outer sleeve of the valve body, the insulating sleeve is made of insulating material, the insulating sleeve is tightly fitted to the valve body, and has a good insulation effect, reduces the influence of the external environment on the exhaust valve, and effectively prevents the icing phenomenon caused by low temperature. The exhaust channel is set in an "inverted L shape", which can prevent dust and other debris from adhering to the exhaust channel. A movable baffle is provided in the exhaust channel, and the upper end of the movable baffle is hinged to the inner wall of the exhaust channel through a pin shaft. When the gas needs to be discharged, the movable baffle will automatically open to allow the gas to be discharged smoothly; when the exhaust is not needed, the movable baffle will be closed to prevent the outside cold air from entering, ensuring that the parts in the valve are not troubled by low temperature freezing. When the trace gas in the outlet reaches a certain pressure that is not enough to push the valve core to move, but can push the steel ball to overcome the elastic force of the spring to open the valve hole, the trace gas can pass through the gap between the steel ball and the valve hole and be discharged from the exhaust port through the trace exhaust channel, reducing the safety hazards caused by gas accumulation. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the cross-sectional structure of the utility model;

[0016] Figure 2 yes Figure 1 A schematic diagram of the enlarged structure at A in the middle;

[0017] Figure 3 yes Figure 1 Schematic diagram of the enlarged structure at point B in the middle.

[0018] Figure 1-3 In: 1. valve body; 11. exhaust port; 12. air outlet; 13. exhaust channel; 131. movable baffle; 14. extension; 2. valve chamber; 3. back cover; 31. air inlet; 32. first conical expansion; 33. guide hole; 34. second conical expansion; 4. valve core member; 41. sealing lip; 42. guide rod; 5. trace exhaust channel; 51. valve hole; 52. spring; 53. spring seat; 531. exhaust hole; 54. steel ball; 6. insulation sleeve; 7. sealing ring. DETAILED DESCRIPTION

[0019] The utility model is further described below in conjunction with the accompanying drawings.

[0020] like Figure 1-3 The exhaust valve shown in the figure comprises a valve body 1, wherein the valve body 1 is provided with a valve cavity 2, the lower end of the valve body 1 is provided with a back cover 3, the back cover 3 is provided with an air inlet 31 connected with the valve cavity 2, the valve body 1 is provided with an exhaust port 11 and an exhaust port 12 respectively connected with the valve cavity 2, a valve core member 4 for controlling the switching of the air paths among the air inlet 31, the exhaust port 11 and the exhaust port 12 is movably provided in the valve cavity 2, preferably, in the present embodiment, the valve core member 4 is made of elastic material, such as rubber material, and has good elasticity and durability, which is beneficial to improve the service life of the valve core member 4, in order to ensure the normal operation of the exhaust valve at low temperature, the outer cover of the valve body 1 is provided with an insulation sleeve 6, and the insulation sleeve 6 is made of insulation material, and the insulation sleeve 6 is tightly fitted to the valve body 1, which has a good insulation effect, reduces the influence of the external environment on the exhaust valve, and effectively prevents the icing phenomenon caused by low temperature, and the exhaust port 11 and the valve cavity 2 are connected. An exhaust channel 13 is formed in the middle, and the exhaust channel 13 is set in an "inverted L shape" to prevent dust and other debris from adhering to the exhaust channel 13. A movable baffle 131 is provided in the exhaust channel 13, and the upper end of the movable baffle 131 is hinged to the inner wall of the exhaust channel 13 through a pin shaft. When the gas needs to be discharged, the movable baffle 131 will automatically open to allow the gas to be discharged smoothly; when the gas does not need to be discharged, the movable baffle 131 will be closed under the action of its own gravity to prevent the outside cold air from entering, ensuring that the parts in the valve are not troubled by low temperature freezing. A trace exhaust channel 5 for connecting the air outlet 12 and the exhaust port 11 is also provided in the valve body 1. A trace valve core assembly and a valve hole 51 matched with the trace valve core assembly are movably provided in the trace exhaust channel 5. The trace valve core assembly always has a movement tendency to block the valve hole 51. Preferably, in this embodiment, refer to Figure 2The micro valve core assembly includes a spring 52, a spring seat 53 and a steel ball 54. The spring seat 53 is fixedly connected to the valve body 1. The center of the spring seat 53 is axially provided with an exhaust hole 531 that passes through. The micro exhaust channel 5 is connected to the exhaust port 11 through the exhaust hole 531. A spring 52 is provided between the spring seat 53 and the steel ball 54. Specifically, the upper end of the spring 52 is against the spring seat 53, and the lower end of the spring 52 is against the steel ball 54. The spring 52 always has a movement tendency that causes the steel ball 54 to block the valve hole 51 to prevent gas leakage. The micro exhaust channel 5 is connected to the air outlet 12 through the valve hole 51. Preferably, in this embodiment, the micro exhaust channel 5 is arranged in an "L-shape". This design helps to reduce the influence of the pressure of the air inlet 31 on the micro exhaust channel 5.

[0021] When the trace gas in the air outlet 12 reaches a certain pressure which is not enough to push the valve core 4 to move, but can push the steel ball 54 to overcome the elastic force of the spring 52 to open the valve hole 51, the trace gas can pass through the gap between the steel ball 54 and the valve hole 51 and be discharged from the exhaust port 11 through the trace exhaust channel 5, thereby reducing the safety hazard caused by gas accumulation.

[0022] Preferably, in the present embodiment, the upper end of the rear cover 3 extends into the valve cavity 2 and is provided with a first conical expansion opening 32, and the valve core member 4 is provided with a sealing lip 41 which is sealed with the first conical expansion opening 32, and the sealing lip 41 can fit tightly with the first conical expansion opening 32 to prevent gas leakage. Preferably, in the present embodiment, the valve body 1 is provided with an extension portion 14 which is abutted against the valve core member 4, and the valve core member 4 abuts against the extension portion 14 when it moves upward.

[0023] Preferably, in this embodiment, the lower end of the valve core member 4 is fixedly provided with a guide rod 42, and the rear cover 3 is provided with a guide hole 33 that matches the guide rod 42. The guide hole 33 is respectively connected to the air inlet 31 and the valve cavity 2, so that the valve core member 4 is not easily offset when moving. Preferably, in this embodiment, refer to Figure 3 A second conical expansion opening 34 is provided at one end of the guide hole 33 close to the valve cavity 2. When the gas enters the valve cavity 2 through the guide hole 33, it can diffuse more smoothly, thereby reducing the accumulation and compression of the gas.

[0024] Preferably, in this embodiment, a sealing ring 7 is disposed between the rear cover 3 and the valve body 1 to ensure the sealing performance between the rear cover 3 and the valve body 1 and prevent gas leakage.

[0025] The working principle of the utility model is as follows: when gas enters from the air inlet 31, the valve core member 4 is pushed up and against the extension portion 14, and the gas breaks through the sealing lip 41 and is discharged from the air outlet 12. When gas enters from the working port, the gas reaches a certain pressure that is not enough to push the valve core member 4 to move, but can push the steel ball 54 to overcome the elastic force of the spring 52 to open the valve hole 51. A trace amount of gas can pass through the gap between the steel ball 54 and the valve hole 51 and be discharged from the exhaust port 11 through the trace exhaust channel 5. When the gas reaches a certain pressure that is enough to push the valve core member 4 down, the sealing lip 41 is sealed and fitted with the first conical expansion opening 32 to prevent gas leakage. The gas passes through the gap between the valve core member 4 and the extension portion 14 and is discharged from the exhaust port 11 through the exhaust channel 13.

[0026] The above description is only a preferred embodiment of the present utility model, so all equivalent changes or modifications made according to the structure, features and principles described in the scope of the present utility model patent application are included in the scope of the present utility model patent application.

Claims

1. An exhaust valve, comprising a valve body (1), wherein a valve cavity (2) is provided in the valve body (1), a rear cover (3) is provided at the lower end of the valve body (1), the rear cover (3) is provided with an air inlet (31) connected to the valve cavity (2), the valve body (1) is provided with an exhaust port (11) and an exhaust port (12) respectively connected to the valve cavity (2), a valve core member (4) is movably provided in the valve cavity (2) for controlling the switching of air paths between the air inlet (31), the exhaust port (11) and the exhaust port (12), and the valve is characterized in that: The valve body (1) is provided with a heat-insulating sleeve (6) on its outer cover, and an exhaust channel (13) is formed between the exhaust port (11) and the valve cavity (2). The exhaust channel (13) is arranged in an "inverted L-shape", and a movable baffle (131) is arranged in the exhaust channel (13). The upper end of the movable baffle (131) is hinged to the inner wall of the exhaust channel (13) via a pin shaft. The valve body (1) is also provided with a micro exhaust channel (5) for connecting the exhaust port (12) and the exhaust port (11). A micro valve core assembly and a valve hole (51) matched with the micro valve core assembly are movably arranged in the micro exhaust channel (5), and the micro valve core assembly always has a movement tendency to block the valve hole (51).

2. An exhaust valve according to claim 1, characterized in that: The micro valve core assembly comprises a spring (52), a spring seat (53) and a steel ball (54); the spring seat (53) is fixedly connected to the valve body (1); a through exhaust hole (531) is axially provided at the center of the spring seat (53); the micro exhaust channel (5) is connected to the exhaust port (11) via the exhaust hole (531); a spring (52) is provided between the spring seat (53) and the steel ball (54); the spring (52) always has a movement tendency to make the steel ball (54) block the valve hole (51); and the micro exhaust channel (5) is connected to the exhaust port (12) via the valve hole (51).

3. An exhaust valve according to claim 1, characterized in that: The upper end of the rear cover (3) extends into the valve cavity (2) and is provided with a first conical expansion opening (32), and the valve core member (4) is provided with a sealing lip (41) that seals with the first conical expansion opening (32).

4. An exhaust valve according to claim 1, characterized in that: A guide rod (42) is fixedly provided at the lower end of the valve core member (4), and the rear cover (3) is provided with a guide hole (33) matching the guide rod (42), and the guide hole (33) is respectively connected to the air inlet (31) and the valve cavity (2).

5. An exhaust valve according to claim 4, characterized in that: A second tapered expansion opening (34) is provided at one end of the guide hole (33) close to the valve chamber (2).

6. An exhaust valve according to claim 1, characterized in that: The valve body (1) is provided with an extension portion (14) that abuts against the valve core member (4).

7. An exhaust valve according to claim 1, characterized in that: A sealing ring (7) is disposed between the rear cover (3) and the valve body (1).

8. An exhaust valve according to claim 1, characterized in that: The valve core member (4) is made of elastic material.

9. An exhaust valve according to claim 1, characterized in that: The trace exhaust channel (5) is arranged in an "L-shape".

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