CN214617934U

CN214617934U - Flow-limiting zero pressure valve

Info

Publication number: CN214617934U
Application number: CN202120560659.8U
Authority: CN
Inventors: 李学谦
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-03-19
Filing date: 2021-03-19
Publication date: 2021-11-05
Anticipated expiration: 2031-03-19

Abstract

A flow-limiting zero-pressure valve comprises a valve body, wherein the valve body comprises a water inlet, a water outlet and a longitudinally arranged valve cavity, the water inlet is communicated with the valve cavity through a water inlet hole, the water outlet is communicated with the valve cavity through a water outlet hole, a valve core capable of longitudinally sliding to realize zero-pressure valve opening and closing is arranged in the valve cavity, a diaphragm is arranged at the lower end of the valve core, the inner side surface of the diaphragm is arranged at the lower end of the valve core in a sealing mode, the outer diameter D1 of the upper portion of the valve core is smaller than the inner diameter D2 of the valve cavity, a plurality of grooves are longitudinally arranged at the lower portion of the valve core, a sealing ring and a sealing ring pressing plate for fixing the sealing ring are arranged on the inner wall of the valve cavity, the sealing ring is abutted against the valve core, so that the valve cavity is divided into an upper valve cavity and a lower valve cavity, and communication or partition of the upper valve cavity and the lower valve cavity is realized along with existence or disappearance of negative pressure in the valve cavity; the material of the membrane is silica gel, and the Shore hardness of the membrane is 45HA-70 HA. Therefore, the utility model has the advantages of spare part still less, the structure is simpler, the fault point still less, use more stable.

Description

Flow-limiting zero pressure valve

Technical Field

The utility model relates to a zero-pressure valve field especially relates to a current-limiting zero-pressure valve.

Background

Chinese patent document CN 110145622 a discloses a negative pressure valve, which comprises a valve body provided with a water inlet, a water outlet and a valve cavity, wherein the valve cavity is vertically arranged in the valve body, the side part of the valve cavity is provided with a water inlet hole communicated with the water inlet, and the head end of the valve cavity is provided with a water outlet hole communicated with the water outlet; the valve cavity is internally provided with a valve rod capable of sliding up and down to control the opening degree of the water outlet hole, an elastic resetting device is arranged between the tail end of the valve rod and the tail end of the valve cavity, the head end of the valve rod is provided with a flexible balance ring, and the inner side surface of the flexible balance ring is hermetically arranged at the head end of the valve cavity and communicated with the outside of the valve body. The invention also relates to a water supply system, which comprises a water pump, a heating body and a water outlet mechanism which are sequentially connected through a water path, and is characterized in that the water inlet end of the water pump is provided with the negative pressure valve, the water inlet end of the water pump is connected with the water outlet of the negative pressure valve through the water path, and the water inlet of the negative pressure valve is connected with a water source through the water path.

The negative pressure valve in china in the prior art has the following defects in the using process: an elastic reset device is required to be arranged in the negative pressure valve for resetting the valve rod. The negative pressure valve with the structure has the advantages of more parts, complex structure, large volume and more fault points, and the elastic resetting device has the problem of instability after being used for a period of time, so that the service life of the whole negative pressure valve is influenced, and the use experience of a user is also influenced.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem, the utility model discloses to the society provide a spare part still less, the structure is simpler, the fault point still less, use more stable current-limiting zero pressure valve.

The technical scheme of the utility model is that: the flow-limiting zero-pressure valve comprises a valve body, wherein the valve body comprises a water inlet, a water outlet and a longitudinally arranged valve cavity, the water inlet is communicated with the valve cavity through a water inlet hole, the water outlet is communicated with the valve cavity through a water outlet hole, a valve core capable of longitudinally sliding to realize zero-pressure valve opening and closing is arranged in the valve cavity, a diaphragm is arranged at the lower end of the valve core, the inner side surface of the diaphragm is hermetically arranged at the lower end of the valve core, the outer diameter D1 of the upper part of the valve core is smaller than the inner diameter D2 of the valve cavity, a plurality of grooves are longitudinally arranged at the lower part of the valve core, a sealing ring and a sealing ring pressing plate for fixing the sealing ring are arranged on the inner wall of the valve cavity, and the sealing ring is abutted against the valve core, so that the valve cavity is divided into an upper valve cavity and a lower valve cavity, and communication or partition of the upper valve cavity and the lower valve cavity is realized along with existence or disappearance of negative pressure in the valve cavity; the material of the diaphragm is silica gel, and the Shore hardness of the diaphragm is 45HA-70 HA.

As an improvement of the present invention, the actuation arc R of the diaphragm is designed such that when the actuation arc R is leveled, the valve is in a fully open state, and after the actuation arc R rebounds completely, the valve is closed.

As the utility model discloses an improvement, the sealing washer clamp plate includes the clamp plate body, thereby the edge of the terminal surface of keeping away from the sealing washer of clamp plate body forms annular chimb along axial extension, is equipped with a plurality of arc between annular chimb and the clamp plate body and wears the groove.

As the improvement of the utility model, a plurality of the arc-shaped through grooves are arranged to form a circle concentric with the annular convex edge.

As the improvement of the utility model, a plurality of the arc-shaped through grooves are arranged at intervals of a preset central angle.

As the improvement of the utility model, the case is including even pole portion and cap as an organic whole, and is a plurality of the recess sets up pole portion be close to cap one side.

As an improvement of the utility model, the lower extreme of case is equipped with diaphragm installation position, the diaphragm is installed diaphragm installation position department.

As an improvement of the utility model, the diaphragm passes through the diaphragm clamp plate and the diaphragm screw is installed diaphragm installation position department.

As an improvement of the utility model, still include the drain pan, the drain pan is located the lower extreme of diaphragm, and with the valve body is connected, the drain pan be used for with the diaphragm restriction is in between drain pan and the valve body.

As an improvement of the present invention, the bottom casing is connected to the valve body through a bottom casing connecting screw.

The utility model discloses because the material of diaphragm is silica gel, the shao shi hardness of diaphragm is 45HA-70HA, the utility model discloses when using, the delivery port is connected to the water pump, and when the water pump during operation, diaphragm, case, valve pocket produced the negative pressure, made diaphragm action arc produce quantitative deformation, and the case moves up, and until the sealing washer no longer supports at case outer wall, go up valve pocket, lower valve pocket and inlet opening intercommunication, the water of water inlet can pass through the case smoothly, flows to the delivery port by the outlet opening again, goes out water from the delivery port. When the water pump stops, the negative pressure disappears, the diaphragm action arc pulls the valve core to move downwards at the moment, the valve core moves downwards until the outer wall of the valve core is abutted against the sealing ring, so that the upper valve cavity and the lower valve cavity are separated, water flow cannot flow out from the water outlet at the moment, and the zero pressure valve is in a closed state. The utility model discloses in, because of case, diaphragm clamp plate are become a whole by the diaphragm screw fixation, this whole action arc that can be with the help of negative pressure and diaphragm leads to water or reset function to reach certain water yield and flow. Compared with the prior art, the utility model discloses a need not to set up elasticity resetting means, but realizes reseing of valve rod through the diaphragm. The negative pressure valve of this kind of structure not only spare part still less, the structure is simpler, and the volume is littleer, and the fault point also still less moreover, uses more stably, helps prolonging the life of zero pressure valve, and user's use experience is also better.

Drawings

Fig. 1 is a schematic plan view of an embodiment of the present invention.

Fig. 2 is a schematic view of the structure of fig. 1 from another perspective.

Fig. 3 is a schematic sectional view in the direction of fig. 2A-a.

Fig. 4 is a schematic perspective view of fig. 1 with the bottom case removed.

Fig. 5 is a perspective view of the gasket pressing plate of fig. 4.

Fig. 6 is a perspective view of the valve cartridge of fig. 3.

Fig. 7 is a perspective view of the other angle of fig. 6.

Detailed Description

Referring to fig. 1 to 7, the present invention disclosed in fig. 1 to 7 provides an embodiment of a flow-limiting zero-pressure valve, which includes a valve body 1, the valve body 1 includes a water inlet 11, a water outlet 12 and a valve cavity 13 vertically arranged, the water inlet 11 is communicated with the valve cavity 13 through a water inlet 110, the water outlet 12 is communicated with the valve cavity 13 through a water outlet 120, a valve core 14 capable of longitudinally sliding to realize zero-pressure valve opening and closing is arranged in the valve cavity 13, a diaphragm 15 is arranged at a lower end of the valve core 14, an inner side surface of the diaphragm 15 is hermetically arranged at a lower end of the valve core 14, an outer diameter D1 of an upper portion of the valve core 14 is smaller than an inner diameter D2 of the valve cavity 13, so as to form a gap 130 between the valve core 14 and the valve cavity 13, a plurality of grooves 140 are longitudinally arranged at a lower portion of the valve core 14, a sealing ring 16 and a sealing ring pressing plate 17 for fixing the sealing ring 16 are arranged on an inner wall of the valve cavity 13, the sealing ring 16 is abutted against the valve core 14, so that the valve cavity 13 is divided into an upper valve cavity and a lower valve cavity, and the communication or the partition of the upper valve cavity and the lower valve cavity is realized along with the existence or the disappearance of negative pressure in the valve cavity 13; the membrane is characterized in that the membrane 15 is made of silica gel, and the Shore hardness of the membrane 15 is 45HA-70 HA; the utility model discloses when using, delivery port 12 is connected to the water pump, and when the water pump during operation, diaphragm 15, case 14, valve pocket 13 produced the negative pressure, made diaphragm 15 action arc R produce quantitative deformation, and case 14 moves up, no longer supports at case 14 outer wall until sealing washer 16, goes up valve pocket, lower valve pocket and inlet opening 110 intercommunication, and the water of water inlet 11 can pass through case 14 smoothly, flows to delivery port 12 by apopore 120 again, goes out water from delivery port 12. When the water pump stops, the negative pressure disappears, at the moment, the diaphragm 15 acts on the arc R to pull the valve core 14 to move downwards, the valve core 14 moves downwards until the outer wall of the valve core 14 is abutted against the sealing ring 16, so that the upper valve cavity and the lower valve cavity are separated, at the moment, water flow cannot flow out from the water outlet 12, and the zero-pressure valve is in a closed state. The utility model discloses in, because of case 14, diaphragm 15, diaphragm clamp plate 151 are fixed into a whole by diaphragm screw 152, this is whole can be with the help of negative pressure and diaphragm 15's action arc to lead to water or reset function to reach certain water yield and flow. Compared with the prior art, the utility model discloses a need not to set up elasticity resetting means, but realize the reseing of case 14 through diaphragm 15. The negative pressure valve of this kind of structure not only spare part still less, the structure is simpler, and the volume is littleer, and the fault point also still less moreover, uses more stably, helps prolonging the life of zero pressure valve, and user's use experience is also better.

The utility model discloses in, it is preferred, water inlet 11 departments are equipped with water inlet cap 111, water inlet jack catch 112, water inlet gasket 113 and water inlet sealing washer 114, water inlet cap 111 cover is established outside water inlet jack catch 112, water inlet sealing washer 114 is located between water inlet jack catch 112 and the valve body 1, water inlet gasket 113 sets up between water inlet sealing washer 114 and the water inlet jack catch 112.

The utility model discloses in, it is preferred, delivery port 12 department is equipped with delivery port cap 121, delivery port jack catch 122, delivery port gasket 123 and delivery port sealing washer 124, delivery port cap 121 cover is established outside delivery port jack catch 122, delivery port sealing washer 124 is located between delivery port jack catch 122 and the valve body 1, delivery port gasket 123 sets up between delivery port sealing washer 124 and the delivery port jack catch 122.

The utility model discloses in, it is preferred, the action arc R of diaphragm 15 designs into when action arc R is evened up, and the valve is for the state of opening wide, and after action arc R kick-backed completely, the valve is closed, and such advantage lies in the valve when the open mode, and the rivers guarantee is the biggest, and during the valve closed mode, also be the state of tightly closing, the on-off control of zero-pressure valve is more sensitive.

The utility model discloses in, it is preferred, sealing washer clamp plate 17 includes clamp plate body 170, thereby clamp plate body 170 keeps away from the edge of the terminal surface of sealing washer 16 and forms annular chimb 171 along axial extension, is equipped with a plurality of arc wearing groove 172 between annular chimb 171 and the clamp plate body 170. The utility model discloses in, concrete, a plurality of arc is worn groove 172 and is arranged and form and annular chimb 171 concentric circular, a plurality of arc is worn groove 172 and is separated by predetermined central angle setting. The arc-shaped through groove 172 is used for communicating the water outlet hole 120 and the valve cavity 13, a sealing ring pressing plate installation position is arranged in the valve body 1, and the sealing ring pressing plate 17 is arranged on the sealing ring pressing plate installation position and plays a role in fixing the sealing ring 16 and limiting the position of the sealing ring 16.

In the present invention, preferably, the valve core 14 includes a rod portion 141 and a cover portion 142 connected as a whole, the plurality of grooves 140 are disposed on one side of the rod portion 141 close to the cover portion 142, the rod portion 141 and the cover portion 142 are integrally formed, or are separated, in this embodiment, the rod portion 141 and the cover portion 142 are integrally formed.

The utility model discloses in, it is preferred, the lower extreme of case 14 is equipped with diaphragm installation position, diaphragm 15 is installed diaphragm installation position department, it is concrete, in this embodiment, diaphragm 15 is installed through diaphragm clamp plate 151 and diaphragm screw 152 diaphragm installation position 143 department, during the installation, diaphragm 15 is installed earlier diaphragm installation position 143 department, diaphragm clamp plate 151 sets up in the outer end of pressing at diaphragm 15, then diaphragm screw 152 passes in proper order thereby diaphragm clamp plate 151 and diaphragm 15 get into diaphragm installation position 143 department and fixed.

The utility model discloses in, it is preferred, still include drain pan 18, drain pan 18 is located diaphragm 15's lower extreme, and with valve body 1 is connected, drain pan 18 be used for with diaphragm 15 restriction is in between drain pan 18 and the valve body 1, diaphragm 15 and diaphragm clamp plate 151 isotructures do not expose, play the effect of protection and decoration.

Claims

1. The flow-limiting zero-pressure valve comprises a valve body (1), wherein the valve body (1) comprises a water inlet (11), a water outlet (12) and a vertically arranged valve cavity (13), the water inlet (11) is communicated with the valve cavity (13) through a water inlet hole (110), the water outlet (12) is communicated with the valve cavity (13) through a water outlet hole (120), a valve core (14) capable of longitudinally sliding to realize zero-pressure valve switching is arranged in the valve cavity (13), a diaphragm (15) is arranged at the lower end of the valve core (14), the inner side surface of the diaphragm (15) is arranged at the lower end of the valve core (14) in a sealing manner, the flow-limiting zero-pressure valve is characterized in that the outer diameter D1 of the upper part of the valve core (14) is smaller than the inner diameter D2 of the valve cavity (13), a plurality of grooves (140) are longitudinally arranged at the lower part of the valve core (14), and a sealing ring (16) and a sealing ring pressing plate (17) for fixing the sealing ring (16) are arranged on the inner wall of the valve cavity (13), the sealing ring (16) is abutted against the valve core (14), so that the valve cavity (13) is divided into an upper valve cavity and a lower valve cavity, and the upper valve cavity is communicated or separated with the lower valve cavity along with the existence or disappearance of negative pressure in the valve cavity (13); the material of diaphragm (15) is silica gel, the shore hardness of diaphragm (15) is 45HA-70 HA.

2. The flow-limiting zero-pressure valve of claim 1, wherein: the arc of action R of the diaphragm (15) is designed such that when the arc of action R is flattened, the valve is in a fully open state, and when the arc of action R is fully rebounded, the valve is closed.

3. A limited flow zero pressure valve according to claim 1 or 2, wherein: the sealing ring pressing plate (17) comprises a pressing plate body (170), the edge of the end face, far away from the sealing ring (16), of the pressing plate body (170) extends axially to form an annular convex edge (171), and a plurality of arc-shaped through grooves (172) are formed between the annular convex edge (171) and the pressing plate body (170).

4. The flow-limiting zero-pressure valve of claim 3, wherein: the arc-shaped through grooves (172) are arranged to form a circle concentric with the annular convex edge (171).

5. The flow-limiting zero-pressure valve of claim 4, wherein: the arc-shaped through grooves (172) are arranged at intervals of a preset central angle.

6. A limited flow zero pressure valve according to claim 1 or 2, wherein: the valve core (14) comprises a rod part (141) and a cover part (142) which are connected into a whole, and the grooves (140) are formed in one side, close to the cover part (142), of the rod part (141).

7. A limited flow zero pressure valve according to claim 1 or 2, wherein: the lower end of the valve core (14) is provided with a membrane mounting position (143), and the membrane (15) is mounted at the membrane mounting position (143).

8. A limited flow zero pressure valve according to claim 1 or 2, wherein: the diaphragm (15) is mounted at the diaphragm mounting position (143) through a diaphragm pressing plate (151) and a diaphragm screw (152).

9. A limited flow zero pressure valve according to claim 1 or 2, wherein: the diaphragm valve further comprises a bottom shell (18), wherein the bottom shell (18) is located at the lower end of the diaphragm (15) and connected with the valve body (1), and the bottom shell (18) is used for limiting the diaphragm (15) between the bottom shell (18) and the valve body (1).

10. The flow-limiting zero-pressure valve of claim 9, wherein: the bottom shell (18) is connected with the valve body (1) through a bottom shell connecting screw (181).