CN205116289U - High leakproofness does not have negative pressure water supply vacuum inhibitor - Google Patents

Abstract

The utility model discloses a high-tightness non-negative pressure water supply vacuum suppressor, which is provided with an upper casing and a lower casing on a flange, a floating body is packaged inside the lower casing, and the upper end of the floating body is connected with a top The upper end of the ejector rod is located in the upper shell, and the upper end is connected with a horizontal plate. The horizontal plate is provided with a primary gasket; The air cylinder is fixed by the air guide cylinder seat and can slide up and down. The lower end of a conical telescopic sleeve is sealed and connected with the upper end of the air guide cylinder, and the upper end is sealed and connected with the inner wall of the upper shell; the upper side of the conical telescopic sleeve is provided with a mesh plate. A secondary gasket is fixed on the underside of the plate. The utility model adopts a double-seal structure, as long as one end of the air guiding cylinder is closed, the necessary function of the vacuum suppressor can be realized, so it has a long service life and stable operation.

Description

High-tightness non-negative pressure water supply vacuum suppressor

technical field

The utility model relates to the field of non-negative pressure water supply, in particular to a double-sealed non-negative pressure water supply vacuum suppressor.

Background technique

The vacuum suppressor is mainly used in the secondary pressurized water supply equipment of the municipal tap water pipe network to suppress the negative pressure in the water supply system and maintain the pressure balance of the tap water pipe network. The current vacuum suppressor is usually composed of a float ball and a valve body. Composed of a large core part, the floating ball floats up and down according to the water level change in the steady flow compensation tank, and then drives the valve body to move and switch the on-off state. The on-off state of the current vacuum suppressor is only controlled by one switch mechanism (valve plate, ball valve). Once there is a problem with the sealing of the switch mechanism, the vacuum suppressor cannot work normally, and the switch mechanism is an action part, which is relatively worn. Therefore, the existing vacuum suppressor has the disadvantages of short service life, unstable operation, and poor sealing performance.

Utility model content

The purpose of the utility model is to provide a high-tightness non-negative pressure water supply vacuum suppressor with reasonable structure design, good sealing performance, long service life and stable operation.

In order to achieve the above-mentioned technical purpose, the utility model adopts the following technical solutions:

A high-tightness non-negative pressure water supply vacuum suppressor, which is provided with an upper casing above the flange, and a lower casing below, and the upper casing communicates with the lower casing; the lower casing is made of hollowed out The side wall and the bottom are composed of a floating body that can move up and down. The upper end of the floating body is connected with a push rod that can move up and down with it. The upper end of the push rod is located in the upper shell, and the upper end of the push rod is connected with a horizontal plate The horizontal plate is provided with a primary gasket; the upper side of the flange is provided with a guiding mechanism for the ejector rod to pass through to prevent the ejector rod from swinging; device; above the primary gasket, there is a vertical air guide cylinder with a smaller diameter than the air guide cylinder. The air guide cylinder is fixed inside the upper shell through the air guide cylinder seat and can slide up and down. There is a push-down spring that drives the air guide cylinder to reset downward; a tapered telescopic sleeve with a large upper part and a smaller lower part is located directly above the air guide cylinder, its lower end is in sealing connection with the upper end of the air guide cylinder, and its upper end is in sealing connection with the inner wall of the upper casing; The upper side of the conical telescopic sleeve is provided with a mesh plate horizontally fixed in the upper shell, and the lower side of the mesh plate is fixed with a secondary gasket located directly above the air guide cylinder; when the floating body floats, the primary gasket and the secondary The secondary sealing gasket seals the two ends of the air guiding cylinder. When the floating body sinks, the primary sealing gasket and the secondary sealing gasket do not seal the two ends of the air guiding cylinder; the upper end of the upper shell is covered with a dust cover.

When the water level in the steady flow compensation tank is insufficient, the floating body descends with the liquid level, and then the primary gasket moves downward with the horizontal plate, and the air guide cylinder is reset downward by the action of the push-down spring, and finally the primary gasket and the secondary gasket Both are separated from the air guide cylinder, and the steady flow compensation tank is connected with the atmosphere through the lower shell, the upper shell, the air guide cylinder, the conical telescopic sleeve, and the air filter, so as to avoid the negative pressure in the steady flow compensation tank and the water replenishment process. The air in the medium steady flow compensation tank is exhausted to the outside world. When the water level in the steady flow compensation tank is full, the floating body floats up, and the horizontal plate moves upward with the primary gasket, the primary gasket closes the lower end of the air guide cylinder and pushes the air guide cylinder to overcome the elastic force of the push-down spring to slide upward, and finally the upper end of the air guide cylinder It is closed by the secondary sealing gasket, so that the vacuum suppressor is in a cut-off state, and the water in the steady flow compensation tank maintains normal water pressure without overflowing.

The utility model has the following beneficial effects: since the air guiding cylinder is the necessary passage for connecting the steady flow compensation tank with the outside world, both ends of the air guiding cylinder can be closed in the cut-off state, achieving the purpose of double sealing; The two ends, the primary gasket and the secondary gasket belong to the action parts, and the tightness is easily affected by wear and tear. However, the utility model adopts a double-sealing structure. As long as one end of the air guide cylinder is closed, the necessary function of the vacuum suppressor can be realized. , so its long service life and stable operation.

Description of drawings

Fig. 1 is the structural representation of the utility model.

In the figure, 1. Lower shell, 2. Floating body, 3. Ejector rod, 4. Guide mechanism, 5. Horizontal plate, 6. Primary gasket, 7. Push down spring, 8. Air guiding cylinder, 9. Air guiding cylinder Seat, 10, dust cover, 11, mesh plate, 12, air filter, 13, secondary gasket, 14, conical telescopic sleeve, 15, upper shell, 16, flange.

detailed description

As shown in Fig. 1, a high-tightness non-negative pressure water supply vacuum suppressor disclosed by the utility model has an upper shell 15 above the flange 16, a lower shell 1 below, and an upper shell 1. 15 communicates with the inner cavity of the lower casing 1; the lower casing 1 is composed of a hollow side wall and a bottom, and a floating body 2 that can move up and down is packaged inside, and the upper end of the floating body 2 is connected with a floating body that can move up and down with it. The upper end of the ejector rod 3 is located in the upper housing 15, and the upper end of the ejector rod 3 is connected to a horizontal plate 5, and the horizontal plate 5 is provided with a primary gasket 6; the upper side of the flange plate 16 A guide mechanism 4 is installed for the push rod 3 to pass through to prevent the push rod 3 from swinging; the upper shell 15 is only open at the upper end and an air filter 12 is installed; the primary sealing gasket 6 is provided with a The vertical air guide cylinder 8 smaller in diameter, the air guide cylinder 8 is fixed inside the upper housing 15 through the air guide cylinder seat 9 and can slide up and down. The lower push spring 7 of the lower reset; a tapered telescopic sleeve 14 with a large upper part and a smaller lower part is located directly above the air guide cylinder 8, its lower end is sealed and connected with the upper end of the air guide cylinder 8, and its upper end is sealed and connected with the inner wall of the upper housing 15; The upper side of the conical telescopic sleeve 14 is provided with a mesh plate 11 horizontally fixed in the upper casing 15, and the lower side of the mesh plate 11 is fixed with a secondary sealing gasket 13 directly above the air guide cylinder 8; When starting, the primary sealing pad 6 and the secondary sealing pad 13 will seal the two ends of the air guiding tube 8, and when the floating body 2 sinks, the primary sealing pad 6 and the secondary sealing pad 13 will not seal the two ends of the air guiding tube 8; The upper end of the above-mentioned upper casing 15 is covered with a dustproof cover 10 .

When the water level in the steady flow compensation tank is insufficient, the floating body 2 descends with the liquid level, thereby causing the primary sealing gasket 6 to move downward with the horizontal plate 5, and the air guiding cylinder 8 is reset downward by the action of the push-down spring 7, and finally the primary sealing gasket 6 and the secondary sealing gasket 13 are all separated from the air guiding cylinder 8, and the steady flow compensation tank is communicated with the atmosphere through the lower casing 1, the upper casing 15, the air guiding cylinder 8, the conical telescopic sleeve 14, and the air filter 12, and then can Avoid negative pressure in the steady flow compensation tank and the air in the steady flow compensation tank is discharged to the outside during the water replenishment process. When the water level in the steady flow compensation tank is full, the floating body 2 floats, and the horizontal plate 5 moves upward with the primary sealing gasket 6, and the primary sealing gasket 6 closes the lower end of the air guiding cylinder 8 and pushes the air guiding cylinder 8 to overcome the elastic force of the push-down spring 7 Sliding upwards, finally the upper end of the air guide tube 8 is closed by the secondary sealing gasket 13, so that the vacuum suppressor is in a cut-off state, and the water in the steady flow compensation tank maintains normal water pressure without overflowing.

Because the air guide tube 8 is the necessary passage for connecting the steady flow compensation tank with the outside world, and both ends of the air guide tube 8 are closed in the cut-off state, achieving the purpose of double sealing; The gasket 6 and the secondary sealing gasket 13 belong to the moving parts, and the tightness is easily affected by wear and tear. However, the utility model adopts a double-sealing structure. As long as one end of the air guiding cylinder 8 is closed, the necessary function of the vacuum suppressor can be realized, so It has long service life and stable operation.

Claims (1)

1. a high leakproofness non-negative pressure method of water supply vacuum suppresser, it is characterized in that: be provided with upper shell above flange, below is provided with lower house, and upper shell communicates with lower house; Described lower house is made up of the sidewall of hollow out and bottom, enclosed inside has buoyancy body moving up and down, the upper end of buoyancy body is connected with a push rod that can move up and down with it, the upper end of push rod is positioned at upper shell, and the upper end of push rod is connected with a horizontal plate, this horizontal plate is provided with once sealing pad; The guiding mechanism preventing push rod from swinging for push rod passes is installed on the upside of described flange; Described upper shell only upper end opens and is installed on air filter; Be provided with a vertical gas cylinder little compared with its diameter directly over described once sealing pad, this gas cylinder is fixed on upper shell inside through air guide cylinder base and can slides up and down, and is provided with to order about under gas cylinder resets downwards to push away spring between gas cylinder and air guide cylinder base; One up big and down small tapered telescopic cover is positioned at directly over gas cylinder, and the upper end of its lower end and gas cylinder is tightly connected, and its upper end is connected with the inner wall sealing of upper shell; The upside of tapered telescopic cover is provided with a level and is fixed on mesh plate in upper shell, is fixed with one and is positioned at secondary seal pad directly over gas cylinder on the downside of this mesh plate; When buoyancy body is floated, once sealing pad and secondary seal pad are by the closed at both ends of gas cylinder, and when buoyancy body is sunk, once sealing pad and secondary seal pad are not closed the two ends of gas cylinder; Described upper shell upper end is coated with dust cover.