阅读说明：本技术 一种防冻排气阀 (Anti-freezing exhaust valve ) 是由 徐勇 李政宏 于 2019-12-03 设计创作，主要内容包括：本发明涉及一种防冻排气阀,通过筒状的外壳固定设置在输水管道上,包括插入到外壳内并与外壳固定连接的筒状阀体、固定在阀体上端面处带有中心通孔的圆环形阀盖以及贯穿阀体上下端面的阀轴,所述的阀轴顶端进行旋转操作,底端固定有锁定螺母,该防冻排气阀还包括设置在上端面处的上密封排气机构、设置在下端面处的下密封排气机构以及固定在阀体下部内壁的螺母驱动机构,与现有技术相比,本发明具有隔离式、便于维修、功能全面、减少热损、防冻结、防杂物等优点。(The invention relates to an anti-freezing exhaust valve which is fixedly arranged on a water pipeline through a cylindrical shell and comprises a cylindrical valve body, a circular valve cover and a valve shaft, wherein the cylindrical valve body is inserted into the shell and fixedly connected with the shell, the circular valve cover is fixed at the upper end face of the valve body and is provided with a central through hole, the valve shaft penetrates through the upper end face and the lower end face of the valve body, the top end of the valve shaft is rotationally operated, and the bottom end of the valve shaft is fixedly provided with a locking nut.)

1. The utility model provides an exhaust valve prevents frostbite, sets up on conduit (18) through fixed the setting of shell (16) of tube-shape, including insert in shell (16) and with shell (16) fixed connection's tube-shape valve body (1), fix ring shape valve gap (3) that have central through-hole in valve body (1) up end department and run through valve shaft (6) of terminal surface about valve body (1), valve shaft (6) top carry out the rotation operation, the bottom mounting has lock nut (9), its characterized in that, this exhaust valve prevents frostbite still including setting up the last sealed exhaust mechanism of up end department, setting up the lower sealed exhaust mechanism of terminal surface department under and fixing the nut actuating mechanism at valve body (1) lower part inner wall.

2. The anti-freezing exhaust valve according to claim 1, wherein the upper sealing exhaust mechanism comprises a valve seat sealing ring (5) fixed at the outer edge of the central through hole of the valve cover (3), and a buoy (2) and an air suction and exhaust valve (4) which are sequentially sleeved outside the valve shaft (6) from top to bottom, wherein the air suction and exhaust valve (4) and the valve seat sealing ring (5) form an upper sealing pair.

3. An anti-freeze exhaust valve according to claim 2, characterized in that said valve seat seal (5) is a ring structure with a central orifice for passing through the valve shaft (6), and the valve seat seal (5) is sealed with the valve cover (3) by the seal.

4. The antifreeze exhaust valve according to claim 2, characterized in that the air intake and exhaust valve (4) is in the shape of an annular plate, the surface of the air intake and exhaust valve is provided with a plurality of small hole seats (8) for exhausting a small amount of air, and downward bends are arranged at the inner edge and the outer edge to increase rigidity and air circulation capacity.

5. An anti-freezing exhaust valve as claimed in claim 2, characterized in that the float bowl (2) is a fully closed ring-shaped cylindrical structure, the upper and lower ends of which are sealed, the center of which is used to pass through the inner hole of the valve shaft (6) and can slide up and down on the valve shaft (6).

6. The antifreezing vent valve as claimed in claim 5, wherein the buoyancy force applied to the float (2) after being partially or completely submerged in water is greater than the self gravity, and the difference between the buoyancy force and the gravity is greater than the self gravity of the air intake and exhaust valve (4), thereby pushing the air intake and exhaust valve (4) upward to press against the valve seat seal ring (5) to seal the upper end surface of the valve body (1).

7. The anti-freezing exhaust valve according to claim 1, wherein the lower sealing exhaust mechanism comprises an isolation/buffer plate (7) which is sleeved on the lower portion of the valve shaft (6) and is positioned above the locking nut (9), and an annular boss (19) which is arranged on the lower end face of the valve body and forms a lower sealing pair with the isolation/buffer plate (7), a gap is formed between the lower portion of the valve shaft (6) and a through hole in the center of the isolation/buffer plate (7), and the nut (9) is fastened with the valve shaft (6).

8. The anti-freezing exhaust valve according to claim 1, wherein the nut driving mechanism comprises a boss (17) fixed on the inner wall of the lower portion of the valve body (1) and a driving nut assembly (14) arranged inside the boss (17), an external thread is formed at the lower portion of the valve shaft (6), an internal thread corresponding to the external thread is formed inside the driving nut assembly (14), the valve shaft (6) is rotated to drive the valve shaft (6) to move up and down through the nut assembly (14), and the locking nut (9) drives the isolation/buffer plate (7) to form sealing with the annular boss (19).

9. The anti-freezing exhaust valve according to claim 1, characterized in that the anti-freezing exhaust valve further comprises a filter cylinder arranged at the bottom of the valve body (1), the filter cylinder is uniformly provided with a plurality of strip-shaped openings (20) along the circumferential direction, and the filter screens (15) are arranged at the bottom of the filter cylinder and the strip-shaped openings (20) to prevent impurities from entering the valve body (1).

10. The exhaust valve for preventing freezing as claimed in claim 1, further comprising an air cover plate (10) provided on the top of the valve cover (3) and a thermal insulation cover (11) fixed to the air cover plate (10) by a fastening member for reducing heat loss due to air flow while preventing freezing of moisture in the air injected during micro-exhaust.

Technical Field

The invention relates to the field of fluid machinery, in particular to an anti-freezing exhaust valve.

Background

The exhaust valve is a device commonly used in the water fluid conveying industry, is used for exhausting air in a pipeline during positive pressure, and can suck air when negative pressure occurs in the pipeline, so that the pipeline is prevented from being damaged by instability, and the exhaust valve plays an important role in ensuring the normal operation of a pipeline system.

The exhaust valves commonly used in the market at present can not adapt to the northern cold climate, and the interior of the exhaust valves is easy to freeze and damage in winter, so that the valves lose the original functions. Special insulation measures are required. In addition, in order to ensure the maintenance of the valve, an isolation valve needs to be arranged in front of the valve, so that the height of an exhaust facility is increased, and the heat preservation of the facility is not facilitated.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provide an anti-freezing exhaust valve.

The purpose of the invention can be realized by the following technical scheme:

the utility model provides an exhaust valve prevents frostbite, sets up on water pipe through the shell of tube-shape is fixed, including the tube-shape valve body that inserts in the shell and with shell fixed connection, fix ring shape valve gap that has central through-hole in valve body up end department and run through the valve shaft of valve body up and down terminal surface, the valve shaft top rotate the operation, the bottom is fixed with lock nut, this exhaust valve prevents frostbite still including setting up the last sealed exhaust mechanism of up end department, setting up the lower sealed exhaust mechanism of terminal surface department under and fix the nut actuating mechanism at valve body lower part inner wall.

The upper sealing exhaust mechanism comprises a valve seat sealing ring fixed at the outer edge of a through hole in the center of the valve cover, and a buoy and an air suction and exhaust valve which are sequentially sleeved outside the valve shaft from top to bottom, wherein the air suction and exhaust valve and the valve seat sealing ring form an upper sealing pair.

The valve seat sealing ring is of an annular structure with a hole in the center, the hole in the center is used for penetrating through the valve shaft, and the valve seat sealing ring is sealed with the valve cover through the sealing ring.

The air suction and exhaust valve is in the shape of an annular plate, a plurality of small hole seats for micro-exhaust are formed in the surface of the air suction and exhaust valve, and downward bends are arranged at the inner edge and the outer edge of the air suction and exhaust valve to increase rigidity and air circulation capacity.

The float bowl is of a fully-closed annular cylindrical structure, the upper end and the lower end of the float bowl are sealed, and the center of the float bowl starts to penetrate through an inner hole of the valve shaft and can slide up and down on the valve shaft.

The buoyancy force of the buoy after the part or the whole buoy is submerged by water is larger than the gravity of the buoy, and the difference between the buoyancy force and the gravity is larger than the gravity of the air suction and exhaust valve, so that the air suction and exhaust valve is pushed upwards to be tightly pressed with the valve seat sealing ring, and the sealing of the upper end surface of the valve body is realized.

The lower sealing exhaust mechanism comprises an isolation/buffer plate which is sleeved on the lower part of the valve shaft and is positioned above the locking nut, and an annular boss which is arranged on the lower end face of the valve body and forms a lower sealing pair with the isolation/buffer plate, a gap is arranged between the lower part of the valve shaft and a through hole in the center of the isolation/buffer plate, and the nut is fastened with the valve shaft.

The nut driving mechanism comprises a boss fixed on the inner wall of the lower portion of the valve body and a driving nut assembly arranged inside the boss, an external thread is formed in the lower portion of the valve shaft, an internal thread corresponding to the external thread is arranged on the inner side of the driving nut assembly, the valve shaft is driven by the nut assembly to move up and down, and the locking nut drives the isolation/buffer plate to form sealing with the annular boss.

The anti-freezing exhaust valve further comprises a filter cylinder arranged at the bottom of the valve body, wherein a plurality of strip-shaped openings are uniformly formed in the circumferential direction of the filter cylinder, and filter screens are arranged at the bottom of the filter cylinder and at the strip-shaped openings to prevent sundries from entering the valve body.

The anti-freezing exhaust valve further comprises an air cover plate arranged at the top of the valve cover and a heat insulation sleeve fixed on the air cover plate through a fastener, so that heat loss caused by air flowing is reduced, and water vapor in the sprayed air is prevented from freezing when trace air is exhausted.

Compared with the prior art, the invention has the following advantages:

firstly, keep apart, be convenient for maintain: most parts of the anti-freezing exhaust valve designed by the invention are arranged in a pipeline for conveying fluid, the valve is prevented from freezing by utilizing the heat energy of the fluid, and meanwhile, the valve is internally provided with the isolating valve, so that the valve can be maintained.

Secondly, the function is comprehensive: the invention can realize large-amount exhaust and micro-amount exhaust simultaneously.

Thirdly, reducing heat loss and preventing freezing: according to the invention, the air cover plate is arranged on the valve cover, the heat insulation sleeve is fixed on the air cover plate through the fastening piece, and the heat loss of the air flowing to the equipment can be effectively reduced through the arrangement of the heat insulation sleeve. Meanwhile, the water vapor in the air sprayed from the small hole seat is prevented from freezing.

Fourthly, sundries prevention: according to the invention, the outer surface of the filter cylinder at the bottom end of the valve body is provided with a plurality of strip-shaped openings, and the strip-shaped openings and the bottom end of the opening of the filter cylinder are sealed by the filter screen, so that sundries are prevented from entering the valve body.

Drawings

FIG. 1 is a schematic structural diagram of the present invention.

FIG. 2 is a schematic diagram of the present invention in a mass exhaust configuration.

Fig. 3 is a schematic view of the present invention in a mass inhalation configuration.

FIG. 4 is a schematic view of the present invention in micro-venting.

Fig. 5 is a partially enlarged view of a portion of fig. 4A.

Fig. 6 is a schematic structural view of the lower seal venting mechanism.

Fig. 7 is a schematic view of the structure of the separator plate when forming a seal.

The notation in the figure is:

1. the valve comprises a valve body, 2, a buoy, 3, a valve cover, 4, an air suction and exhaust valve, 5, a valve seat sealing ring, 6, a valve shaft, 7, an isolation/buffer plate, 8, a small hole seat, 9, a locking nut, 10, an air cover plate, 11, a heat insulation sleeve, 12, a sealing ring, 13, a fastening piece, 14, a driving nut component, 15, a filter screen, 16, a shell, 17, a boss, 18, a water pipeline, 19, an annular boss, 20 and a strip-shaped opening.

Detailed Description

The invention is described in detail below with reference to the figures and specific embodiments.