CN219062551U - Balancing valve for foam system - Google Patents
Balancing valve for foam system Download PDFInfo
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- CN219062551U CN219062551U CN202223151349.4U CN202223151349U CN219062551U CN 219062551 U CN219062551 U CN 219062551U CN 202223151349 U CN202223151349 U CN 202223151349U CN 219062551 U CN219062551 U CN 219062551U
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Abstract
A balance valve for a foam system comprises a valve body, a valve cover, a piston and a throttling device; a piston cavity is formed between the valve cover and the valve body, the piston is movably arranged in the piston cavity, and the piston divides the piston cavity into a foam liquid cavity and a fire-fighting water cavity; the throttle device is arranged in the valve body, a throttle cavity is arranged in the throttle device, the valve body piston comprises a piston body and a piston shaft lever, the piston shaft lever is arranged in the middle of the piston body, one end of the piston shaft lever stretches into the outlet channel, and the other end of the piston shaft lever stretches into the throttle cavity; the flow of the throttling cavity can be adjusted by adjusting the depth of the piston shaft rod extending into the throttling cavity. The throttling device is built in, is not easy to loosen by external force, is simpler in whole, and has the advantages that two ends of the piston shaft rod respectively extend into the outlet channel and the throttling cavity, so that the concentricity of the piston in the moving process is higher, and the structure is stable. When the balance valve is assembled, the balance valve can be assembled only by arranging the piston between the valve covers and connecting the valve covers with the valve bodies, and the balance valve is convenient to assemble.
Description
Technical Field
The utility model relates to the field of fire-fighting equipment, in particular to a balance valve for a foam system.
Background
When the foam fire extinguishing system is used for extinguishing fire, fire water and foam liquid are required to be mixed according to a certain proportion, the pressure of the fire water can be changed in a certain range, and the pressure of the foam liquid also can be synchronously changed along with the pressure of the fire water. The balance valve is generally used for controlling the mixing of fire water and foam liquid, the traditional balance valve adopts diaphragm seal, the reliability is poor, the balance valve for controlling the flow of the foam liquid through a piston is developed on the market, but the balance valve is complex in assembly mode, and after a period of use, the piston is easy to shift to cause seal failure.
Disclosure of Invention
The utility model aims to overcome the defects and provide the balance valve for the foam system, which is stable in structure and convenient to assemble.
In order to achieve the above object, the technical solution of the present utility model is: a balance valve for a foam system comprises a valve body, a valve cover, a piston and a throttling device;
one end of the valve cover is connected with one end of the valve body, a piston cavity is formed between the valve cover and the valve body, the piston is movably arranged in the piston cavity, and the piston divides the piston cavity into a foam liquid cavity and a fire-fighting water cavity; the other end of the valve cover is provided with a foam liquid outlet, and an outlet channel which is communicated with the foam liquid outlet and the piston cavity is arranged in the valve cover; the valve body is provided with a fire water inlet communicated with the fire water cavity;
the throttling device is arranged in the valve body, a throttling cavity is arranged in the throttling device, a foam liquid inlet is arranged at the other end of the valve body, and the foam liquid inlet is communicated with the throttling cavity;
the piston comprises a piston body and a piston shaft rod, the piston shaft rod is arranged in the middle of the piston body, two ends of the piston shaft rod extend out of two ends of the piston body respectively, one end of the piston shaft rod can movably extend into the outlet channel, and the other end of the piston shaft rod can movably extend into the throttling cavity; the middle part of piston axostylus axostyle is equipped with the foam liquid passageway at intercommunication both ends, and foam liquid passageway all communicates with outlet channel, foam liquid chamber, throttle chamber, and the adjustable throttle chamber of degree of depth that the piston axostylus axostyle stretched into the throttle chamber flow.
The piston separates foam liquid cavity and fire control water cavity, and foam liquid cavity intercommunication foam liquid, fire control water cavity lets in fire control water, and the pressure differential in fire control water cavity and foam liquid cavity can promote the piston and remove, and the piston axostylus axostyle stretches into the degree of depth in throttle chamber and produces the change when the piston removes, changes the flow of foam liquid, changes the pressure in foam liquid cavity simultaneously. So that the flow of the foam liquid and the flow of the fire water can be output according to a certain proportion. The two ends of the piston shaft rod extend into the outlet channel and the throttling cavity respectively, and the concentricity of the piston in the moving process is higher, so that the structure is stable. When the balance valve is assembled, the balance valve can be assembled only by arranging the piston between the valve covers and connecting the valve covers with the valve bodies, and the balance valve is convenient to assemble.
Preferably, one end of the valve body is provided with a slot with internal threads, one end of the valve cover is provided with a plug with external threads, and the valve cover is in threaded connection with the valve body by inserting the plug into the slot. The valve cover and the valve body are connected through the external screw of the plug and the internal screw of the slot, so that the assembly is convenient.
Preferably, the outer circumference of the piston body is provided with an O-ring. The piston seals the foam liquid cavity and the fire-fighting water cavity which are separated through the O-shaped ring, and the structure is simple and the performance is reliable.
Preferably, an inner cavity is arranged in the plug, the bottom of the slot and the inner cavity of the plug form a piston cavity, a mounting hole is formed in the middle of the bottom surface of the slot, the throttling device is arranged in the mounting hole, and the throttling device is in threaded connection with the mounting hole. The throttling device and the valve body can be separated, and the processing of the throttling device is convenient.
Preferably, the throttling device is internally provided with a shaft hole, the piston shaft rod extends into the throttling cavity from the shaft hole, the inner wall of the shaft hole is provided with a sealing ring for sealing the gap between the shaft hole and the piston shaft rod, the throttling cavity is provided with a retaining wall at a position opposite to the foam liquid channel, and the end part of the piston shaft rod can move to the retaining wall. The retaining wall is used for blocking the foam liquid channel.
Preferably, the foam liquid inlet and the foam liquid outlet are both provided with internal threads. The foam liquid input pipeline and the foam liquid output pipeline are connected through the internal threads, and the threads cannot be damaged.
Preferably, the outer diameter of one end of the valve body connected with the valve cover is larger than the outer diameter of the other end of the valve body, and the fire fighting water inlet and the foam liquid inlet face the same direction. The connector connected with the fire water inlet can be along the length direction of the balance valve, so that the width of the balance valve after being installed can be reduced.
Preferably, the throttling device comprises a throttling seat and a baffle, wherein one end of the throttling seat is provided with a throttling groove, the other end of the throttling seat is provided with a shaft hole, the baffle is arranged at one end of the throttling seat, the baffle and the throttling groove form a throttling cavity, the middle part of the baffle is a retaining wall, and the periphery of the retaining wall is provided with through grooves communicated with two ends of the baffle. The throttling device can be integrally formed or separately processed.
By adopting the technical scheme, the utility model has the beneficial effects that: the throttling device is built in, is not easy to loosen by external force, is simpler in whole, and has the advantages that two ends of the piston shaft rod respectively extend into the outlet channel and the throttling cavity, so that the concentricity of the piston in the moving process is higher, and the structure is stable. When the balance valve is assembled, the balance valve can be assembled only by arranging the piston between the valve covers and connecting the valve covers with the valve bodies, and the balance valve is convenient to assemble.
Drawings
FIG. 1 is a schematic diagram of the structure of the present utility model;
FIG. 2 is a schematic view of the structure of the present utility model when the fire water pressure is reduced;
FIG. 3 is a schematic view of a throttle device according to the present utility model;
FIG. 4 is a cross-sectional view of the throttle device of the present utility model;
fig. 5 is a schematic structural view of a throttle device according to embodiment 2 of the present utility model.
The main reference numerals illustrate:
a valve cover 1; a foam liquid outlet 11; an outlet channel 12; a plug 13; a valve body 2; a foam liquid inlet 21; a slot 22; a fire water inlet 23; a mounting hole 24; a throttle device 3; a throttle chamber 31; a retaining wall 32; a shaft hole 33; a piston chamber 4; a foam liquid chamber 41; a fire water chamber 42; a piston 5; a piston body 51; a piston shaft 52; a foam liquid passage 53; an O-ring 54.
Detailed Description
The utility model is further described below with reference to the drawings and specific examples.
Example 1:
as shown in fig. 1-2, the balance valve for the foam system of the utility model comprises a valve body 2, a valve cover 1, a piston 5 and a throttling device 3.
One end of the valve cover 1 is connected with one end of the valve body 2, and a piston cavity 4 is formed between the valve cover 1 and the valve body 2. One end of the valve body 2 is provided with a slot 22 with internal threads, one end of the valve cover 1 is provided with a plug 13 with external threads, and the valve cover 1 and the valve body 2 are inserted into the slot 22 through the plug 13 for threaded connection. An inner cavity is arranged in the plug 13, and the bottom of the slot 22 and the inner cavity of the plug 13 form the piston cavity 4.
The throttle device 3 is arranged in the valve body 2, the middle part of the bottom surface of the slot 22 is provided with a mounting hole 24, the throttle device 3 is arranged in the mounting hole 24, and the throttle device 3 is in threaded connection with the mounting hole 24. As shown in fig. 3 and 4, the throttle device 3 is provided with a shaft hole 33, a throttle chamber 31, and a retaining wall 32, wherein the shaft hole 33 is provided at one end of the throttle chamber 31 and is communicated with the throttle chamber 31, the retaining wall 32 is provided at the other end of the throttle wall 31, and the retaining wall 32 faces the shaft hole 33. The throttling device is annularly provided with a plurality of arc-shaped through grooves 34 on the periphery of the baffle 32, and the through grooves are communicated with the throttling cavity 31 and the foam liquid inlet. The other end of the valve body 2 is provided with a foam liquid inlet 21, and the foam liquid inlet 21 is communicated with a throttle cavity 33.
A piston 5 is movably arranged in the piston chamber 4, the piston 5 dividing the piston chamber 4 into a foam liquid chamber 41 and a fire fighting water chamber 42. The other end of the valve cover 1 is provided with a foam liquid outlet 11, and an outlet channel 12 which is communicated with the foam liquid outlet 11 and the piston cavity 4 is arranged in the valve cover 1. The piston 5 comprises a piston body 51, a piston shaft 52, O-rings. The piston shaft lever 52 is arranged in the middle of the piston body 51, two ends of the piston shaft lever 52 extend out of two ends of the piston body 51 respectively, one end of the piston shaft lever 52 can movably extend into the outlet channel 12, and the other end of the piston shaft lever 52 can movably extend into the throttling cavity; the middle part of the piston shaft lever 52 is provided with a foam liquid channel 53 which communicates with both ends of the piston shaft lever 52. The foam liquid passage 53 communicates with the outlet passage 12, the foam liquid chamber 41, and the throttle chamber 31. The piston shaft 52 extends into the throttle chamber 31 from the shaft hole 33, a sealing ring for sealing the gap between the shaft hole 33 and the piston shaft 52 is arranged on the inner wall of the shaft hole 33, the retaining wall 32 is arranged at a position opposite to the foam liquid channel 53 of the piston shaft, and the end part of the piston shaft 53 can move to the retaining wall position. Adjusting the depth of the piston shaft extending into the throttle chamber adjusts the gap between the foam liquid channel 53 and the retaining wall, thereby adjusting the flow rate of the throttle chamber. An O-ring 54 is provided on the outer periphery of the piston body 51.
The valve body 2 is provided with a fire water inlet 23 communicated with the fire water cavity; the outer diameter of one end of the valve body 2 connected with the valve cover 1 is larger than that of the other end of the valve body 2, and the fire fighting water inlet 23 and the foam liquid inlet 21 face the same direction. Both the foam liquid inlet 21 and the foam liquid outlet 11 are provided with an internal thread.
During installation, the throttling device 3 is firstly arranged in the mounting hole 24 of the valve body 2 and screwed, then the other end of the piston shaft rod is inserted into the shaft hole of the throttling device 3, the valve cover 1 covers the slot 22 of the valve body 2 and simultaneously covers one end of the piston shaft rod 52 by the outlet channel, the assembly of the balance valve can be completed by screwing the valve cover, the assembly is convenient, and when the balance valve is used, the piston rod is not easy to skew, and the performance is stable.
As shown in fig. 1 and 2, the foam liquid enters the valve body from the foam liquid inlet 21 and flows into the throttle chamber 31 of the throttle device, then flows into the outlet passage from the foam liquid passage 53 of the piston shaft, finally flows out from the foam liquid outlet of the valve cover, and the foam liquid in the foam liquid passage flows into the foam liquid chamber. The fire water is communicated with the fire water cavity, and when the pressure of the fire water is reduced, the pressure in the fire water cavity is synchronously reduced. The pressure of the foam liquid cavity 41 pushes the piston 5 to move towards the fire-fighting water cavity 42, when the piston 5 moves towards the fire-fighting water cavity 42, the piston shaft lever 52 of the piston 5 penetrates into the throttling cavity to be close to the retaining wall 32, the gap between the piston shaft lever 52 and the retaining wall 32 is reduced, the foam liquid flow rate flowing into the foam liquid channel 53 is reduced, the piston stops moving, and a new balance is achieved between the foam liquid flow rate of the balance valve and the flow rate of fire-fighting water.
Example 2:
as shown in fig. 1, 2 and 5, the balance valve for the foam system of the present utility model, as shown in fig. 1-2, comprises a valve body 2, a valve cover 1, a piston 5 and a throttling device 3.
One end of the valve cover 1 is connected with one end of the valve body 2, and a piston cavity 4 is formed between the valve cover 1 and the valve body 2. The throttle device 3 is arranged in the valve body 2, the middle part of the bottom surface of the slot 22 is provided with a mounting hole 24, the throttle device 3 is arranged in the mounting hole 24, and the throttle device 3 is in threaded connection with the mounting hole 24. As shown in fig. 5, the throttle device includes a throttle seat 35 and a baffle 34. One end of the throttle seat 35 is provided with a throttle groove 311, the other end is provided with a shaft hole 33, the baffle 36 is arranged at one end of the throttle seat 35, the baffle 36 and the throttle groove 311 form a throttle cavity 31, the middle part of the baffle 36 is a retaining wall 32, and the periphery of the retaining wall 32 is provided with a through groove 34 communicated with two ends of the baffle 36 by the baffle 36. The shaft hole 33 is provided at one end of the throttle chamber 31 and communicates with the throttle chamber 31, the retaining wall 32 is provided at the other end of the throttle wall 31, and the retaining wall 32 faces the shaft hole 33. The other end of the valve body 2 is provided with a foam liquid inlet 21, and the through groove is used for communicating the throttle cavity 31 and the foam liquid inlet.
A piston 5 is movably arranged in the piston chamber 4, the piston 5 dividing the piston chamber 4 into a foam liquid chamber 41 and a fire fighting water chamber 42. The other end of the valve cover 1 is provided with a foam liquid outlet 11, and an outlet channel 12 which is communicated with the foam liquid outlet 11 and the piston cavity 4 is arranged in the valve cover 1. The piston 5 includes a piston body 51 and a piston shaft 52. The piston shaft lever 52 is arranged in the middle of the piston body 51, two ends of the piston shaft lever 52 extend out of two ends of the piston body 51 respectively, one end of the piston shaft lever 52 can movably extend into the outlet channel 12, and the other end of the piston shaft lever 52 can movably extend into the throttling cavity; the middle part of the piston shaft lever 52 is provided with a foam liquid channel 53 which communicates with both ends of the piston shaft lever 52. The foam liquid passage 53 communicates with the outlet passage 12, the foam liquid chamber 41, and the throttle chamber 31. The piston shaft 52 extends into the throttle chamber 31 from the shaft hole 33, a sealing ring for sealing the gap between the shaft hole 33 and the piston shaft 52 is arranged on the inner wall of the shaft hole 33, the retaining wall 32 is arranged at a position opposite to the foam liquid channel 53 of the piston shaft, and the end part of the piston shaft 53 can move to the retaining wall position. Adjusting the depth of the piston shaft extending into the throttle chamber adjusts the gap between the foam liquid channel 53 and the retaining wall, thereby adjusting the flow rate of the throttle chamber. The valve body 2 is provided with a fire water inlet 23 communicated with the fire water cavity.
The foregoing description is only illustrative of the preferred embodiments of the present utility model and is not intended to limit the scope of the utility model, which is defined by the appended claims.
Claims (8)
1. A balance valve for a foam system is characterized by comprising a valve body, a valve cover, a piston and a throttling device;
one end of the valve cover is connected with one end of the valve body, a piston cavity is formed between the valve cover and the valve body, the piston is movably arranged in the piston cavity, and the piston divides the piston cavity into a foam liquid cavity and a fire-fighting water cavity; the other end of the valve cover is provided with a foam liquid outlet, and an outlet channel which is communicated with the foam liquid outlet and the piston cavity is arranged in the valve cover; the valve body is provided with a fire water inlet communicated with the fire water cavity;
the throttling device is arranged in the valve body, a throttling cavity is arranged in the throttling device, a foam liquid inlet is arranged at the other end of the valve body, and the foam liquid inlet is communicated with the throttling cavity;
the piston comprises a piston body and a piston shaft rod, the piston shaft rod is arranged in the middle of the piston body, two ends of the piston shaft rod extend out of two ends of the piston body respectively, one end of the piston shaft rod can movably extend into the outlet channel, and the other end of the piston shaft rod can movably extend into the throttling cavity; the middle part of piston axostylus axostyle is equipped with the foam liquid passageway at intercommunication both ends, and foam liquid passageway all communicates with outlet channel, foam liquid chamber, throttle chamber, and the adjustable throttle chamber of degree of depth that the piston axostylus axostyle stretched into the throttle chamber flow.
2. The balance valve for a foam system of claim 1 wherein the valve body has a socket with internal threads at one end and a spigot with external threads at one end of the valve cap, the valve cap being threadably connected to the valve body by the spigot being inserted into the socket.
3. A balance valve for a foam system according to claim 1, characterized in that the outer periphery of the piston body is provided with an O-ring.
4. The balance valve for a foam system according to claim 2, wherein the plug is provided with an inner cavity, the bottom of the slot and the inner cavity of the plug form a piston cavity, the middle part of the bottom surface of the slot is provided with a mounting hole, the throttling device is arranged in the mounting hole, and the throttling device is in threaded connection with the mounting hole.
5. The balance valve for a foam system of claim 4, wherein the throttle device has a shaft hole, the piston shaft extends from the shaft hole into the throttle chamber, a seal ring for sealing a gap between the shaft hole and the piston shaft is provided on an inner wall of the shaft hole, the throttle chamber has a retaining wall at a position facing the foam liquid passage, and an end of the piston shaft is movable to the retaining wall position.
6. A balance valve for a foam system according to claim 1, wherein the foam liquid inlet and the foam liquid outlet are each provided with internal threads.
7. A balance valve for a foam system according to claim 1 wherein the valve body has a larger outer diameter at the end connected to the valve cover than at the other end of the valve body, the fire fighting water inlet being oriented in the same direction as the foam liquid inlet.
8. The balance valve for foam system according to claim 5, wherein the throttling means comprises a throttling seat and a baffle plate, one end of the throttling seat is provided with a throttling groove, the other end of the throttling seat is provided with a shaft hole, the baffle plate is arranged at one end of the throttling seat, the baffle plate and the throttling groove form a throttling cavity, the middle part of the baffle plate is a retaining wall, and the periphery of the retaining wall is provided with a through groove communicated with two ends of the baffle plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223151349.4U CN219062551U (en) | 2022-11-27 | 2022-11-27 | Balancing valve for foam system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223151349.4U CN219062551U (en) | 2022-11-27 | 2022-11-27 | Balancing valve for foam system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219062551U true CN219062551U (en) | 2023-05-23 |
Family
ID=86376536
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223151349.4U Active CN219062551U (en) | 2022-11-27 | 2022-11-27 | Balancing valve for foam system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219062551U (en) |
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2022
- 2022-11-27 CN CN202223151349.4U patent/CN219062551U/en active Active
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