Piston type automatic exhaust valve

Abstract

The utility model provides a piston type automatic exhaust valve which comprises an exhaust valve body, a buoy assembly is arranged in the exhaust valve body and moves up and down in the flowing direction of fluid in the exhaust valve body, a plastic upper cover and a metal upper cover are arranged at the upper end of the exhaust valve body, and the metal upper cover covers the outer portion of the plastic upper cover. An upper sealing gasket is arranged at the top of the buoy assembly and is in contact with the interior of the plastic upper cover; a first exhaust groove is formed in the upper surface of the buoy assembly, a fixing block is arranged on the outer side of the buoy assembly, an exhaust hole is formed in the fixing block, and the first exhaust groove is communicated with the exhaust hole; the exhaust valve body further comprises a lower shell assembly, a second exhaust groove is formed in the bottom of the lower shell assembly, the second exhaust groove is communicated with the interior of the exhaust valve body, and a sealing gasket is arranged at the lower end of the lower shell assembly. When the water level of anti-freezing liquid is increased, the buoy assembly moves upwards due to buoyancy, and the sealing gasket on the buoy is in contact with the plastic upper cover and is tightly matched with the plastic upper cover to form sealing.

Description

Technical Field

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

[0002] The existing exhaust valve mechanism has a complex structure and is prone to leakage risks. In addition, the working status is not easy to check, and the leakage location cannot be found in time, which is inconvenient for subsequent maintenance. Utility Model Content

[0003] In view of the problems existing in the prior art, the present invention provides a piston-type automatic exhaust valve to solve at least one of the above-mentioned technical problems.

[0004] The technical solution of the utility model is: a piston-type automatic exhaust valve, including an exhaust valve body, characterized in that a float assembly is provided inside the exhaust valve body, the float assembly moves up and down along the fluid flow in the exhaust valve body, the upper end of the exhaust valve body is provided with a plastic upper cover and a metal upper cover, the metal upper cover covers the outside of the plastic upper cover, the top of the float assembly is provided with an upper sealing gasket, and the upper sealing gasket is in contact with the inside of the plastic upper cover;

[0005] A first exhaust groove is provided on the upper surface of the float assembly, a fixing block is provided on the outer side of the float assembly, an exhaust hole is provided inside the fixing block, and the first exhaust groove is connected to the exhaust hole;

[0006] The exhaust valve body further includes a lower shell assembly, a second exhaust groove is opened at the bottom of the lower shell assembly, the second exhaust groove is communicated with the interior of the exhaust valve body, and a sealing gasket is provided at the lower end of the lower shell assembly.

[0007] When the water level of the antifreeze liquid increases, the float assembly moves upward due to the buoyancy, and the sealing gasket on the float contacts the plastic upper cover and is tightly matched to form a seal. The greater the water pressure, the better the sealing effect. When the gas increases, the gas passes through the first exhaust groove of the float assembly and then through the exhaust hole of the fixed block to enter the room. When the pressure value overcomes the spring force, the float assembly moves downward, and a gap is formed between the sealing gasket and the plastic upper cover, and exhaust begins.

[0008] Further preferably, the first exhaust groove is a ring-shaped groove body, the second exhaust groove is a strip-shaped groove, and the second exhaust grooves are radially and evenly distributed along the central axis of the lower shell assembly.

[0009] The utility model is suitable for exhaust requirements at different positions through exhaust grooves with different structures.

[0010] Further preferably, a sealing ring is provided at the end of the plastic upper cover, and a dust cover is provided at the top of the metal upper cover.

[0011] It has a double sealing effect.

[0012] Further preferably, the bottom of the float assembly is a conical surface.

[0013] Thereby, it can be better pushed by buoyancy and enhance the sealing effect.

[0014] Further preferably, the lower shell assembly is made of a transparent material.

[0015] This makes it easy to observe the situation inside the valve body and find problems in time for maintenance.

[0016] Beneficial effects:

[0017] 1. Compared with the existing market, this is a brand-new transparent automatic exhaust valve mechanism that uses a pressure spring to solve the problem of automatic exhaust. Compared with the existing market structure, it is simpler and reduces the risk of leakage.

[0018] 2. The lower shell of this automatic exhaust valve is transparent, so you can see the real-time working status inside;

[0019] 3. The parts processing technology is more reasonable;

[0020] 4. Brand new automatic exhaust. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the structure of the exhaust valve of the utility model when it is closed;

[0022] Figure 2 This is a schematic diagram of the structure of the exhaust valve of the utility model when it is open;

[0023] Figure 3 This is a schematic diagram of the three-dimensional structure of the buoy assembly of the utility model;

[0024] Figure 4 It is a schematic diagram of the three-dimensional structure of the lower shell assembly of the utility model.

[0025] In the figure: 1. Float assembly; 2. Plastic upper cover; 3. Metal upper cover; 4. Upper sealing gasket; 5. Fixing block; 6. Exhaust hole; 7. Lower shell assembly; 8. Sealing gasket; 9. Sealing ring; 10. Dust cover; 11. First exhaust groove; 12. Tank body; Second exhaust groove. DETAILED DESCRIPTION

[0026] The present invention will be further described below with reference to the accompanying drawings.

[0027] like Figures 1-4As shown, a piston-type automatic exhaust valve includes an exhaust valve body, a float assembly 1 is provided inside the exhaust valve body, the float assembly moves up and down along the fluid flow in the exhaust valve body, the upper end of the exhaust valve body is provided with a plastic upper cover 2 and a metal upper cover 3, the metal upper cover covers the outside of the plastic upper cover, the top of the float assembly is provided with an upper sealing gasket 4, the upper sealing gasket is in contact with the inside of the plastic upper cover; a first exhaust groove 11 is provided on the upper surface of the float assembly, a fixed block 5 is provided on the outside of the float assembly, an exhaust hole 6 is provided inside the fixed block, and the first exhaust groove is connected to the exhaust hole; the exhaust valve body also includes a lower shell assembly 7, a second exhaust groove 12 is provided at the bottom of the lower shell assembly, the second exhaust groove is connected to the interior of the exhaust valve body, and a sealing gasket 8 is provided at the lower end of the lower shell assembly.

[0028] When the water level of the antifreeze liquid increases, the float assembly moves upward due to the buoyancy, and the sealing gasket on the float contacts the plastic upper cover and is tightly matched to form a seal. The greater the water pressure, the better the sealing effect. When the gas increases, the gas passes through the first exhaust groove of the float assembly and then through the exhaust hole of the fixed block to enter the room. When the pressure value overcomes the spring force, the float assembly moves downward, and a gap is formed between the sealing gasket and the plastic upper cover, and exhaust begins.

[0029] Further preferably, the first exhaust groove is a circular groove body, the second exhaust groove is a linear groove, and the second exhaust grooves are evenly distributed radially along the central axis of the lower shell assembly. The utility model is suitable for exhaust requirements at different locations through exhaust grooves of different structures.

[0030] More preferably, a sealing ring 9 is provided at the end of the plastic upper cover, and a dust cover 10 is provided at the top of the metal upper cover, thereby achieving a double sealing effect.

[0031] More preferably, the bottom of the float assembly is a conical surface 11, so that it can be better pushed by buoyancy and enhance the sealing effect.

[0032] It is further preferred that the lower housing assembly is made of a transparent material, so that the situation inside the valve body can be easily observed and problems can be discovered and repaired in time.

[0033] Beneficial effects:

[0034] 1. Compared with the existing market, this is a brand-new transparent automatic exhaust valve mechanism that uses a pressure spring to solve the problem of automatic exhaust. Compared with the existing market structure, it is simpler and reduces the risk of leakage.

[0035] 2. The lower shell of this automatic exhaust valve is transparent, so you can see the real-time working status inside;

[0036] 3. The parts processing technology is more reasonable;

[0037] 4. Brand new automatic exhaust.

[0038] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technical personnel in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A piston type automatic exhaust valve, comprising an exhaust valve body, characterized in that: A float assembly is provided inside the exhaust valve body, and the float assembly moves up and down along the fluid flow in the exhaust valve body. A plastic upper cover and a metal upper cover are provided on the upper end of the exhaust valve body, and the metal upper cover covers the outside of the plastic upper cover. An upper sealing gasket is provided on the top of the float assembly, and the upper sealing gasket contacts the inside of the plastic upper cover. A first exhaust groove is provided on the upper surface of the float assembly, a fixing block is provided on the outer side of the float assembly, an exhaust hole is provided inside the fixing block, and the first exhaust groove is connected to the exhaust hole; The exhaust valve body further includes a lower shell assembly, a second exhaust groove is opened at the bottom of the lower shell assembly, the second exhaust groove is communicated with the interior of the exhaust valve body, and a sealing gasket is provided at the lower end of the lower shell assembly.

2. A piston type automatic exhaust valve according to claim 1, characterized in that: The first exhaust groove is a ring-shaped groove body, the second exhaust groove is a strip-shaped groove, and the second exhaust grooves are evenly distributed radially along the central axis of the lower shell assembly.

3. The piston type automatic exhaust valve according to claim 1, characterized in that: A sealing ring is provided at the end of the plastic upper cover, and a dustproof cover is provided at the top of the metal upper cover.

4. The piston type automatic exhaust valve according to claim 1, characterized in that: The bottom of the buoy assembly is a conical surface.

5. The piston type automatic exhaust valve according to claim 1, characterized in that: The lower shell component is made of transparent material.

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