CN214008181U - Low resistance backflow preventer with exhaust function - Google Patents

Abstract

The utility model discloses a low resistance backflow preventer with exhausting function. A low resistance backflow preventer with exhaust function comprises a valve body, a valve cover, a water inlet check valve clack, a water outlet check valve clack, a water drain valve rod, a diaphragm, a water inlet check valve shaft sleeve, 3 water inlet check valve shaft sleeve fixing strip-shaped blocks and a water inlet check valve clack reset sealing spring, wherein the diaphragm is fixedly installed at the joint of the valve body and the valve cover by using bolts; the water outlet check valve also comprises a water outlet check valve shaft, a water outlet check valve shaft sleeve, 3 water outlet check valve shaft sleeve fixing strip-shaped blocks and a water outlet check valve clack return sealing spring; the exhaust device of the upper cavity between the upper top surface of the diaphragm and the lower bottom surface of the valve cover is also included. The utility model discloses low resistance backflow preventer with exhaust function has realized its automatic normal of sluicing valve clack and has opened, has prevented that the medium from flowing backwards and polluting the upper reaches water source.

Description

Low resistance backflow preventer with exhaust function

Technical Field

The utility model belongs to a low resistance backflow preventer especially belongs to a low resistance backflow preventer with exhaust function.

Background

The low resistance backflow preventer usually includes the valve body, the valve gap, the check valve clack of intaking, play water check valve clack, the sluicing valve clack, current low resistance backflow preventer exists the sluicing valve clack phenomenon of can not normally opening sometimes, thereby when the low resistance backflow preventer goes out water check valve clack and closes not tightly or can't prevent when damaging medium refluence and pollute the upper reaches water source, designed the sluicing device promptly but because the air that the aquatic contains can't realize sluicing valve clack normally opening, pressure differential is not enough during the sluicing, the sluicing valve clack is difficult to be opened, sluicing reaches and cuts off the function with the air and can not realize. How to realize the automatic normal opening of the sluicing valve clack of the low resistance backflow preventer and prevent the medium from flowing backwards to pollute the upstream water source is the problem to be solved.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the technical problem that will solve is: provided is a low resistance backflow preventer with a venting function. The low-resistance backflow preventer with the exhaust function can realize the automatic normal opening of the water discharge valve clack and prevent the medium from flowing backwards to pollute an upstream water source.

The utility model provides a technical scheme of above-mentioned technical problem is: the utility model provides a low resistance backflow preventer with exhaust function, includes valve body, valve gap, the check valve clack that intakes, the check valve disk seat that intakes, the check valve clack that goes out, play check valve disk seat, sluicing valve clack, sluicing disk seat, sluicing valve rod, the junction of valve body and valve gap uses bolt fixed mounting the diaphragm, and sluicing valve rod upper end passes the diaphragm and uses upper and lower splint, sealing washer and hexagon nut and the sealed fixed connection of diaphragm, constitutes the cavity under the diaphragm between the bottom surface under top surface and the valve gap, constitutes the cavity under the valve body between bottom surface and the sluicing disk seat under the diaphragm, the valve body has into water end, play water end, characterized by: the water inlet check valve also comprises a water inlet check valve shaft, a water inlet check valve shaft sleeve and 3 water inlet check valve shaft sleeve fixing strip-shaped blocks, wherein one end of each of the 3 water inlet check valve shaft sleeve fixing strip-shaped blocks is fixedly connected with the inner surface of the cavity at the water inlet end of the valve body, which is close to one side of the water inlet check valve seat, at equal intervals, the other end of each of the 3 water inlet check valve shaft sleeve fixing strip-shaped blocks is fixedly connected with the outer surface of the water inlet check valve shaft sleeve at equal intervals, the vertical section of the water inlet check valve shaft sleeve fixedly arranged on the inner surface of the cavity at the water inlet end of the valve body, which is close to one side of the water inlet check valve seat, is parallel to the vertical section at the water inlet end of the valve body, one end of the water inlet check valve shaft penetrates through the water inlet check valve shaft sleeve and is fixedly connected with, the end part of the vacant end formed by the water inlet check valve shaft and the water inlet check valve shaft on the other side of the water inlet check valve shaft sleeve is provided with a round nut, the vacant end part of the water inlet check valve shaft between the water inlet check valve shaft sleeve and the round nut is sleeved with a water inlet check valve clack reset sealing spring, and in an initial state, the water inlet check valve clack reset sealing spring pulls the water inlet check valve clack to be sealed on a water inlet check valve seat;

still include the play water non return valve shaft, play water non return valve shaft sleeve, 3 play water check valve shaft sleeve fixed bar pieces, 3 play water check valve shaft sleeve fixed bar piece one end respectively in proper order with the valve body play water end cavity be close to the internal surface equidistant fixed connection of play water check valve disk seat one side, 3 play water check valve shaft sleeve fixed bar piece other ends respectively in proper order with play water non return valve shaft sleeve external surface equidistant fixed connection, use 3 play water check valve shaft sleeve fixed bar pieces fixed mounting to be close to the vertical cross-section of play water check valve shaft sleeve on the internal surface of play water check valve disk seat one side of valve body play water end cavity and the vertical cross-section of valve body play water end parallel, play water non return valve shaft one end is passed out water non return valve shaft sleeve and is connected with the play water check valve clack screw thread fixed connection that sets up on the play water check valve disk seat, it is installing play water check valve clack reset sealing spring on the part between play water check valve shaft sleeve and the play water valve clack to go out water check valve shaft sleeve, play water check valve shaft In the initial state, the valve clack of the water outlet check valve is reset by the sealing spring to push the valve clack of the water outlet check valve to be sealed on the valve seat of the water outlet check valve;

the exhaust device of going up the cavity under still including top surface and the valve gap on the diaphragm between the bottom surface, the exhaust device of going up the cavity is discharge valve under top surface and the valve gap on the diaphragm, be provided with on valve body and valve gap fixed connection bolt's the position on valve gap one side and with discharge valve matched with screw hole, discharge valve screw thread link up installs on the screw hole that the valve gap set up, discharge valve gas vent diameter is 2 millimeters.

The utility model discloses during normal operating condition, the valve body is intake, the valve clack of intaking, the valve clack of play water check valve is opened in proper order, the medium circulation, after upstream cutout, the valve clack of intaking, the valve clack of play water check valve is closed under the valve clack reset seal spring of intaking and the valve clack reset seal spring effect respectively, cavity pressure is greater than the last cavity pressure that the bottom surface constitutes under top surface and the valve gap on the diaphragm under the valve body that constitutes between bottom surface and the outlet valve seat under the diaphragm, promotes diaphragm upward movement simultaneously exhaust valve and opens, because the utility model discloses exhaust valve gas vent diameter is 2 mm, arranges up the interior air of last cavity that top surface and valve gap bottom surface constitute under the diaphragm promptly when pressure differential 0.02MPa, opens the outlet valve clack and sluices, prevents medium refluence or siphon refluence, avoids the upstream of flow pollution water source.

The exhaust valve adopts the prior art.

The utility model has the advantages that: because the utility model is provided with the valve body, the valve cover, the water inlet check valve clack, the water inlet check valve seat, the water outlet check valve clack, the water outlet check valve seat, the water drain valve clack, the water drain valve seat and the water drain valve rod, the diaphragm is fixedly arranged at the joint of the valve body and the valve cover by using the bolt, and the upper end part of the water drain valve rod passes through the diaphragm and is fixedly connected with the diaphragm by using the upper clamping plate, the lower clamping plate, the sealing ring and the hexagon nut; the water inlet check valve shaft is sleeved with a water inlet check valve clack reset sealing spring at a vacant end part between the water inlet check valve shaft sleeve and the round nut; the water outlet check valve is characterized by also comprising a water outlet check valve shaft, a water outlet check valve shaft sleeve and 3 water outlet check valve shaft sleeve fixing strip-shaped blocks, wherein the water outlet check valve shaft sleeve is fixedly connected with a water outlet check valve clack arranged on a water outlet check valve seat through threads; the exhaust device of the upper cavity between the upper surface of the diaphragm and the lower bottom surface of the valve cover is also arranged, the exhaust device of the upper cavity between the upper surface of the diaphragm and the lower bottom surface of the valve cover is an exhaust valve, a threaded hole matched with the exhaust valve is arranged on one side of the valve cover close to the position of the valve body and the valve cover fixed connecting bolt, and the exhaust valve is installed on the threaded hole arranged on the valve cover in a threaded through manner. Because discharge valve gas vent diameter is 2 mm, arrange the interior gas of last cavity that top surface and valve gap bottom surface constitute on the diaphragm promptly when pressure differential 0.02MPa, realize the utility model discloses low resistance backflow preventer sluicing valve clack with exhaust function is automatic normally opens and close. The low resistance backflow preventer with the exhaust function of the utility model realizes the automatic normal opening of the water discharge valve clack, and prevents the medium backflow from polluting the upstream water source; the technical problem that the water drainage valve clack of the existing low-resistance backflow preventer cannot be normally opened is solved.

Drawings

The present invention will be further explained with reference to the drawings and examples;

fig. 1 is a schematic structural diagram of the present invention;

FIG. 2 is a partial enlarged view of the present invention;

in the drawings: 1. the valve comprises a valve body, 2, a valve cover, 3, a water inlet check valve clack, 4, a water outlet check valve clack, 5, a water drain clack, 6, a water drain valve rod, 7, a diaphragm, 8, a water inlet end, 9, a water outlet end, 10, a water inlet check valve shaft, 11, a water inlet check valve shaft sleeve, 12, a water inlet check valve shaft sleeve fixing strip-shaped block, 13, a water inlet check valve clack resetting sealing spring, 14, a water outlet check valve shaft, 15, a water outlet check valve shaft sleeve, 16, a water outlet check valve shaft sleeve fixing strip-shaped block, 17, a water outlet check valve clack resetting sealing spring and 18, and an exhaust valve.

Detailed Description

The present invention will be described in further detail with reference to the following examples.

Example 1

As shown in fig. 1 and 2, a low resistance backflow preventer with exhaust function, including valve body 1, valve gap 2, the check valve clack 3 of intaking, the check valve disk seat of intaking, go out check valve clack 4, the check valve disk seat of going out, sluicing valve clack 5, sluicing disk seat, sluicing valve rod 6, the junction of valve body 1 and valve gap 2 uses bolt fixed mounting diaphragm 7, and 6 upper ends of sluicing valve rod pass diaphragm 7 and use upper and lower splint, sealing washer and hexagon nut and 7 sealed fixed connection of diaphragm, constitute the upper plenum body between diaphragm 7 upper surface and the valve gap 2 lower bottom surface, constitute cavity under the valve body between diaphragm 7 lower bottom surface and the sluicing disk seat, valve body 1 has intake end 8, outlet end 9, characterized by: the water inlet check valve also comprises a water inlet check valve shaft 10, a water inlet check valve shaft sleeve 11 and 3 water inlet check valve shaft sleeve fixing strip-shaped blocks 12, wherein one end of each of the 3 water inlet check valve shaft sleeve fixing strip-shaped blocks 12 is respectively and sequentially fixedly connected with the inner surface of one side of the cavity of the water inlet end 8 of the valve body, which is close to the valve seat of the water inlet check valve, at equal intervals, the other end of each of the 3 water inlet check valve shaft sleeve fixing strip-shaped blocks 12 is respectively and sequentially fixedly connected with the outer surface of the water inlet check valve shaft sleeve 11 at equal intervals, the vertical section of the water inlet check valve shaft sleeve 11, which is fixedly arranged on the inner surface of one side of the cavity of the water inlet end 8 of the valve body, which is close to the valve seat of the water inlet check valve, is parallel to the vertical section of the water inlet end 8 of the valve body, one end of the water inlet check valve shaft 10 penetrates through the water inlet check valve shaft sleeve 11 and is fixedly connected with a water inlet check valve flap 3 arranged on the valve seat of the water inlet check valve, the part of the water inlet check valve shaft 10, which is positioned at the other side of the water inlet check valve shaft sleeve 11, forms a vacant end, the end part of the vacant end, which is formed by the water inlet check valve shaft 10, which is positioned at the other side of the water inlet check valve shaft sleeve 11, is provided with a round nut, the vacant end part, which is positioned between the water inlet check valve shaft sleeve 11 and the round nut, of the water inlet check valve shaft 10 is sleeved with a water inlet check valve clack reset sealing spring 13, and in an initial state, the water inlet check valve clack reset sealing spring 13 pulls the water inlet check valve clack 3 to be sealed on a water inlet check valve seat;

the water outlet check valve also comprises a water outlet check valve shaft 14, a water outlet check valve shaft sleeve 15 and 3 water outlet check valve shaft sleeve fixing strip-shaped blocks 16, wherein one end of each of the 3 water outlet check valve shaft sleeve fixing strip-shaped blocks 16 is respectively and sequentially fixedly connected with the inner surface of one side of the cavity of the water outlet end 9 of the valve body, which is close to the water outlet check valve seat, at equal intervals, the other end of each of the 3 water outlet check valve shaft sleeve fixing strip-shaped blocks 16 is respectively and sequentially fixedly connected with the outer surface of the water outlet check valve shaft sleeve 15 at equal intervals, the vertical section of the water outlet check valve shaft sleeve 15, which is fixedly arranged on the inner surface of one side of the cavity 9 of the water outlet end of the valve body, which is close to the water outlet check valve seat, is parallel to the vertical section of the water outlet end 9 of the valve body, one end of the water outlet check valve shaft 14 passes through the water outlet check valve shaft sleeve 15 and is fixedly connected with a water outlet check valve flap 4 arranged on the water outlet check valve seat, a water outlet check valve clack return sealing spring 17 is arranged on the part of the water outlet check valve shaft 14, which is positioned between the water outlet check valve shaft sleeve 15 and the water outlet check valve clack 4, and in an initial state, the water outlet check valve clack return sealing spring 17 pushes the water outlet check valve clack 4 to be sealed on a water outlet check valve seat;

still include the exhaust apparatus of last cavity between diaphragm 7 upper surface and the lower bottom surface of valve gap 2, the exhaust apparatus of last cavity is discharge valve 18 between diaphragm upper surface and the lower bottom surface of valve gap, is provided with the screw hole with discharge valve 18 matched with on valve gap 2 one side is close to valve body and valve gap fixed connection bolt's the position, and discharge valve 18 screw thread link up installs on the screw hole that valve gap 2 set up, discharge valve 18 gas vent diameter is 2 mm.

From the above description, those skilled in the art can make various changes and modifications without departing from the technical spirit of the present invention, and the present invention is within the protection scope of the present invention. The present invention is not to be considered as the best thing, and belongs to the common general knowledge of the technicians in the field.

Claims (1)

1. The utility model provides a low resistance backflow preventer with exhaust function, includes valve body, valve gap, the check valve clack that intakes, the check valve disk seat that intakes, the check valve clack that goes out, play check valve disk seat, sluicing valve clack, sluicing disk seat, sluicing valve rod, the junction of valve body and valve gap uses bolt fixed mounting the diaphragm, and sluicing valve rod upper end passes the diaphragm and uses upper and lower splint, sealing washer and hexagon nut and the sealed fixed connection of diaphragm, constitutes the cavity under the diaphragm between the bottom surface under top surface and the valve gap, constitutes the cavity under the valve body between bottom surface and the sluicing disk seat under the diaphragm, the valve body has into water end, play water end, characterized by: the water inlet check valve also comprises a water inlet check valve shaft, a water inlet check valve shaft sleeve and 3 water inlet check valve shaft sleeve fixing strip-shaped blocks, wherein one end of each of the 3 water inlet check valve shaft sleeve fixing strip-shaped blocks is fixedly connected with the inner surface of the cavity at the water inlet end of the valve body, which is close to one side of the water inlet check valve seat, at equal intervals, the other end of each of the 3 water inlet check valve shaft sleeve fixing strip-shaped blocks is fixedly connected with the outer surface of the water inlet check valve shaft sleeve at equal intervals, the vertical section of the water inlet check valve shaft sleeve fixedly arranged on the inner surface of the cavity at the water inlet end of the valve body, which is close to one side of the water inlet check valve seat, is parallel to the vertical section at the water inlet end of the valve body, one end of the water inlet check valve shaft penetrates through the water inlet check valve shaft sleeve and is fixedly connected with the water inlet check valve clack arranged on the water inlet check valve seat, and the part of the water inlet check valve shaft, which is positioned at the other side of the check valve shaft sleeve forms a vacant end, the end part of the vacant end formed by the water inlet check valve shaft and the water inlet check valve shaft on the other side of the water inlet check valve shaft sleeve is provided with a round nut, the vacant end part of the water inlet check valve shaft between the water inlet check valve shaft sleeve and the round nut is sleeved with a water inlet check valve clack reset sealing spring, and in an initial state, the water inlet check valve clack reset sealing spring pulls the water inlet check valve clack to be sealed on a water inlet check valve seat;

still include the play water non return valve shaft, play water non return valve shaft sleeve, 3 play water check valve shaft sleeve fixed bar pieces, 3 play water check valve shaft sleeve fixed bar piece one end respectively in proper order with the valve body play water end cavity be close to the internal surface equidistant fixed connection of play water check valve disk seat one side, 3 play water check valve shaft sleeve fixed bar piece other ends respectively in proper order with play water non return valve shaft sleeve external surface equidistant fixed connection, use 3 play water check valve shaft sleeve fixed bar pieces fixed mounting to be close to the vertical cross-section of play water check valve shaft sleeve on the internal surface of play water check valve disk seat one side of valve body play water end cavity and the vertical cross-section of valve body play water end parallel, play water non return valve shaft one end is passed out water non return valve shaft sleeve and is connected with the play water check valve clack screw thread fixed connection that sets up on the play water check valve disk seat, it is installing play water check valve clack reset sealing spring on the part between play water check valve shaft sleeve and the play water valve clack to go out water check valve shaft sleeve, play water check valve shaft In the initial state, the valve clack of the water outlet check valve is reset by the sealing spring to push the valve clack of the water outlet check valve to be sealed on the valve seat of the water outlet check valve;

the exhaust device of going up the cavity under still including top surface and the valve gap on the diaphragm between the bottom surface, the exhaust device of going up the cavity is discharge valve under top surface and the valve gap on the diaphragm, be provided with on valve body and valve gap fixed connection bolt's the position on valve gap one side and with discharge valve matched with screw hole, discharge valve screw thread link up installs on the screw hole that the valve gap set up, discharge valve gas vent diameter is 2 millimeters.

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