CN205578858U - But switch discharge valve - Google Patents

Abstract

The utility model discloses a switchable exhaust valve, which can be vertically installed at the highest point of a heating pipeline system, through which gas separated in water in the pipeline system can be effectively discharged, thereby preventing negative pressure in the pipeline system, Improve the use safety of the pipeline system. Its structure includes valve body, valve cover, floating ball and exhaust passage, etc., mainly adding a knob and a knob ejector that can be manually cut off on the top of the exhaust passage, so as to facilitate maintenance when needed. Or close the exhaust channel in an emergency; at the same time, a filter is installed in the water inlet at the lower end of the valve body, which can effectively prevent impurities from entering the exhaust valve, so as to ensure the safety of the exhaust valve; in addition, the float ejector rod and the knob The ejector rods are used to open and close the exhaust passage by sealing the sealing cone head and the sealing gasket. This kind of cone surface combination seal is more reliable, and also improves the use effect of the exhaust valve. The improved exhaust valve function It is richer and more diverse, and it is more reasonable and safe for system protection.

Description

Switchable exhaust valve

technical field

The utility model relates to an exhaust valve installed in a heating pipeline system, in particular to a switchable exhaust valve.

Background technique

The exhaust valve is a common pipeline valve, which is mostly installed in the exhaust of pipelines such as independent heating systems, central heating systems, heating boilers, central air conditioning, floor heating and solar heating systems, because the water in the pipelines is usually There is a certain amount of air dissolved, and the solubility of air decreases with the increase of temperature; in this way, the gas is gradually separated from the water during the water cycle, and gradually gathers together to form large bubbles, air columns and other cavitations, because the pipeline system There is continuous replenishment of water, so gas is often generated, and the exhaust valve is a kind of exhaust valve installed at the highest point of the pipeline system. Its main function is to release the air pockets generated in the heating system and water supply pipeline. Its work The principle is to set a floating ball with a ejector rod in the valve chamber formed by the valve body and the valve cover, and the valve cover is provided with an exhaust passage connecting the valve chamber. When the air volume and air pressure in the pipeline change, It will cause the water level in the valve cavity to change accordingly, and the floating ball will rise and fall with the change of the water level, so that the exhaust channel will be opened and closed with the thimble. Although this structure solves the exhaust of the heating pipeline system very well problem, but in actual use, it is found that when the exhaust passage must be closed when maintenance is required or in an emergency, the existing exhaust valve has no cut-off structure, so it is inconvenient to use when encountering the above situation; at the same time, due to the exhaust The diameter of the channel is generally designed to be small, and the water in the pipeline system will also contain some impurities, such as iron filings and mixed sand particles in the pipeline. These impurities will enter the exhaust valve with the water, which will cause the exhaust channel to be blocked. , thereby affecting the use safety of the exhaust valve; in addition, the structural design of the sealing opening and closing exhaust channel of the ejector rod on the existing floating ball is not reliable enough, and there are phenomena such as sealing leakage during use, which affects the use effect of the exhaust valve.

Contents of the invention

The technical problem to be solved by the utility model is to overcome the defects of the prior art and provide a switchable exhaust valve with filtering function and cut-off function, and reliable exhaust sealing.

The technical problem of the utility model is realized through the following technical solutions:

A switchable exhaust valve, comprising a valve body and a valve cover sealed and installed on the top of the valve body, a valve cavity is formed between the valve body and the valve cover and a floating ball is arranged inside, and a water inlet connected to the valve cavity is provided at the lower end of the valve body , the valve cover is provided with an exhaust channel connected to the valve cavity, and the top of the floating ball is provided with a floating ball ejector rod, which extends into and seals the opening and closing of the exhaust channel, and the top of the exhaust channel is provided with an axial To seal the moving knob, an upper sealing gasket is installed in the exhaust channel, and the lower end of the knob is provided with a knob ejector rod. The axial seal moves to make sealing contact with the upper sealing washer and opens and closes the exhaust passage.

A filter screen is arranged in the water inlet.

The exhaust passage is provided with a lower sealing washer embedded in it, and the lower sealing washer is located below the upper sealing washer, and the upper end of the floating ball ejector is provided with a sealing contact with the lower sealing washer for opening and closing. Sealing cone for exhaust channel.

A lower inner shoulder for the lower sealing gasket to be embedded is arranged in the exhaust channel.

The exhaust passage is provided with an upper inner shoulder for the upper sealing gasket to be embedded.

One side of the valve cover is provided with an exhaust port of the exhaust channel, and an exhaust joint is installed in the exhaust port.

The exhaust passage is a "┣"-shaped three-way passage formed by connecting a vertical passage and a horizontal passage; the upper and lower sealing gaskets are embedded in the vertical passage, and the exhaust A port is provided at the end of the transverse channel, and the level of the upper sealing gasket is lower than that of the exhaust port.

The axial sealing movement structure of the knob at the top of the exhaust passage is that the knob is screwed into the top of the exhaust passage, and an "O" ring is embedded and fixed on the knob, and the "O" ring is in sealing contact with the in the exhaust duct.

Compared with the prior art, the utility model mainly adds a knob structure on the top of the exhaust channel of the exhaust valve, which can manually cut off the exhaust channel, so as to facilitate the closing of the exhaust channel in case of maintenance or emergency; at the same time, the valve The water inlet at the lower end of the body is equipped with a filter screen, which can effectively prevent impurities from entering the exhaust valve, so as to ensure the safety of the exhaust valve; in addition, both the float ball ejector and the knob ejector are made of sealing cones and sealing gaskets. The sealing contact method is used to open and close the exhaust channel. This kind of conical surface combined with sealing is more reliable, and also improves the use effect of the exhaust valve. The improved exhaust valve has richer and more diverse functions, and it is more reasonable for system protection. Safety.

Description of drawings

Fig. 1 is a schematic cross-sectional structure diagram of the utility model.

Fig. 2 is a schematic cross-sectional structure diagram of the valve cover.

detailed description

The embodiment of the utility model will be described in detail again below according to the above-mentioned accompanying drawings.

As shown in Figures 1 to 2, 1. Valve body, 11. Valve cavity, 12. Water inlet, 2. Valve cover, 21. Exhaust channel, 211. Vertical channel, 212. Horizontal channel, 22. Exhaust Mouth, 23. Upper inner shoulder, 24. Lower inner shoulder, 3. Float ball, 31. Float ball ejector rod, 4. Knob, 41. Knob ejector rod, 5. "O" ring, 6. Exhaust joint, 7. Upper sealing gasket, 8. Lower sealing gasket, 9. Filter screen, 10. Sealing cone head.

The switchable exhaust valve, as shown in Figure 1, is an exhaust valve installed vertically at the highest point of the heating pipeline system, through which the gas separated in the water in the pipeline system can be effectively discharged, thereby preventing the pipeline from Negative pressure is generated in the system to improve the safety of the pipeline system.

The exhaust valve includes a valve body 1 located at the bottom and a valve cover 2 connected to the top of the valve body 1 in a threaded seal. The lower part of the valve body 1 is provided with a water inlet 12 connected to the pipeline system, and a filter screen is provided in the water inlet 12 9. It can be used to filter impurities mixed in water to prevent impurities from entering the exhaust valve and causing exhaust failure.

A valve chamber 11 is formed between the valve body 1 and the valve cover 2. The valve chamber under normal conditions is composed of upper air and lower water. The valve chamber 11 is provided with a floating ball 3 floating on the water surface. The top of the ball is provided with a fixedly installed floating ball ejector rod 31, and a sealing cone head 10 is provided at the upper end of the floating ball ejector rod.

The valve cover 2 is provided with an exhaust channel 21 as shown in Figure 2, which is a "┣" shaped three-way channel formed by connecting a vertical channel 211 and a horizontal channel 212. The vertical channel 211 It communicates with the valve cavity 11 downwards, the vertical passage 211 runs through the top of the valve cover 2 upwards, one end of the transverse passage 212 communicates with the middle of the vertical passage 211, and the other end runs through the side of the valve cover 2 and is set as an exhaust port 22. The air port is provided with a threaded exhaust joint 6, and the outer surface of the exhaust joint is provided with a tooth-shaped structure to facilitate the installation of the hose, and the excess gas in the valve chamber 11 is discharged to the outside through the hose.

The floating ball ejector 31 extends into the vertical passage 211 of the exhaust passage 21, and the inner shoulder 24 is set in the vertical passage for inserting and setting the lower sealing gasket 8, and the floating ball ejector 31 is fitted on the The vertical channel 211 can not only be used as a guide for the lifting movement of the floating ball 3, but also can drive the sealing cone 10 of the floating ball ejector rod 31 to form a sealing contact with the lower sealing gasket 8 with the lifting of the floating ball 3, so that the opening and closing row Gas channel 21.

The seal opening and closing of the floating ball ejector rod 31 to the exhaust passage 21 is as follows: when the gas in the pipeline system enters the valve cavity 11 and slowly accumulates, and causes the pressure in the valve cavity 11 to rise, when the gas pressure is greater than the pressure of the pipeline system, the gas will It will force the water level in the valve cavity 11 to drop, and the float 3 will also drop accordingly, and the sealing cone 10 at the upper end of the float ram 31 will be separated from the lower sealing gasket 8, thereby opening the exhaust passage 21 and closing the valve cavity. The excess gas in 11 is discharged through the exhaust port 22; once the gas discharge makes the pressure in the valve chamber 11 tend to be stable, the water level rises again and drives the float 3 to rise accordingly, and the sealing cone head 10 re-seals and contacts the lower sealing gasket 8, that is, to close the exhaust passage 21 again.

In addition, when negative pressure is generated in the pipeline system and the water level in the valve cavity 11 drops, the exhaust passage 21 will also be opened by the descending float 3. At this time, the external atmospheric pressure is greater than the pressure in the pipeline system, and the external atmospheric pressure Entering the pipeline system through the exhaust channel 21 can prevent negative pressure hazards in the pipeline system.

The top of the vertical passage 211 of the exhaust passage 21 is provided with a knob 4 that is threaded, the upper end of the knob is exposed for easy operation, and the lower end is provided with a knob push rod 41 extending into the exhaust passage 21. At the lower end of the knob push rod There is also a sealing cone 10, and the knob 4 is also provided with an embedded and fixed "O" ring 5, which is in sealing contact with the exhaust passage 21; therefore, when the operating knob 4 is rotated, it can Make the knob and the knob push rod 41 form an axial sealing movement.

At the same time, an upper inner shoulder 23 is also provided in the exhaust passage 21 for the upper sealing gasket 7 to be embedded. The upper sealing gasket is installed above the lower sealing gasket 8, and the level of the upper sealing gasket 7 is lower than the exhaust port. 22, the sealing cone 10 at the lower end of the knob mandrel 41 will be in sealing contact with the upper sealing gasket 7 as it moves axially, that is, moves up and down, thereby opening and closing the exhaust passage 21.

The seal opening and closing of the exhaust channel 21 by the knob push rod 41 is as follows: when maintenance or emergency occurs, the knob 4 can be manually tightened so that the sealing cone 10 at the lower end of the knob push rod 41 is in sealing contact with the upper sealing gasket 7, and the exhaust The channel 21 can be forcibly closed, and the knob 4 is in an open state under normal conditions, so as to facilitate the normal use of the exhaust valve.

The utility model is suitable for the exhaust of heating pipeline systems such as floor heating systems, solar heating systems, heating systems, and central air conditioners. The utility model has various functions, safe use, and is convenient for popularization and application.

The above is only a preferred embodiment of the utility model, so all equivalent changes or modifications done according to the structure, features and principles described in the utility model patent application scope should be included in the utility model patent application scope Inside.

Claims (8)

1. A switchable exhaust valve, including a valve body (1) and a valve cover (2) sealed and installed on the top of the valve body (1), the valve cavity is formed between the valve body (1) and the valve cover (2) (11) There is also a floating ball (3), the lower end of the valve body (1) is provided with a water inlet (12) connected to the valve chamber (11), and the valve cover (2) is provided with an exhaust port connected to the valve chamber (11). Channel (21), the top of the floating ball (3) is provided with a floating ball ejector rod (31), and the floating ball ejector rod extends into and seals the opening and closing of the exhaust channel (21), which is characterized in that the exhaust channel (21 ) is provided with a knob (4) for axial sealing movement on the top, an upper sealing gasket (7) is installed in the exhaust channel (21), and a knob ejector rod (41) is provided at the lower end of the knob (4) , the lower end of the knob push rod is provided with a sealing cone (10), and the sealing cone is moved by the axial seal of the knob (4) to make sealing contact with the upper sealing gasket (7) and open and close the exhaust passage (twenty one). 2. The switchable exhaust valve according to claim 1, characterized in that the water inlet (12) is provided with a filter (9). 3. The switchable exhaust valve according to claim 1, characterized in that the exhaust passage (21) is provided with a lower sealing gasket (8) embedded in it, and the lower sealing gasket is located on the upper sealing gasket ( 7) Below, the upper end of the floating ball ejector (31) is provided with a sealing cone (10) that is in sealing contact with the lower sealing gasket (8) to open and close the exhaust passage (21). 4. The switchable exhaust valve according to claim 3, characterized in that the exhaust channel (21) is provided with a lower inner shoulder (24) in which the lower sealing gasket (8) is embedded. 5. The switchable exhaust valve according to claim 1, characterized in that the exhaust channel (21) is provided with an upper inner shoulder (23) in which the upper sealing gasket (7) is embedded. 6. The switchable exhaust valve according to claim 3, characterized in that the exhaust port (22) of the exhaust channel (21) is provided on one side of the valve cover (2), and the exhaust port is installed in the exhaust port. Gas connector (6). 7. The switchable exhaust valve according to claim 6, characterized in that the exhaust channel (21) is a "┣" shape formed by connecting a vertical channel (211) and a horizontal channel (212) Three-way passage; the upper and lower sealing gaskets are embedded in the vertical passage (211), the exhaust port (22) is arranged at the end of the transverse passage (212), and the upper sealing gasket The level of (7) is lower than the level of the exhaust port (22). 8. The switchable exhaust valve according to claim 1, characterized in that the axial sealing movement structure of the knob (4) on the top of the exhaust passage (21) is that the knob (4) is threaded on the exhaust passage (21) Inside the top, there is an embedded and fixed "O" ring (5) on the knob (4), and the "O" ring is in sealing contact with the exhaust passage (21).