CN218845228U - Gravity type pressure release valve for fire-fighting water supply system - Google Patents
Gravity type pressure release valve for fire-fighting water supply system Download PDFInfo
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- CN218845228U CN218845228U CN202320183474.9U CN202320183474U CN218845228U CN 218845228 U CN218845228 U CN 218845228U CN 202320183474 U CN202320183474 U CN 202320183474U CN 218845228 U CN218845228 U CN 218845228U
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Abstract
The utility model discloses a gravity type relief valve for a fire-fighting water supply system, which comprises a valve body and a valve clack, wherein the valve body is of a shell structure, the valve body comprises a first straight line section, a conical connecting section and a second straight line section which are connected in sequence, and the inner diameter of the first straight line section is larger than that of the second straight line section; an inlet connecting flange is arranged at the port of the second straight line section, the port of the first straight line section is connected with a sealing cover plate through a flange, and a pressure relief pipe is communicated and arranged on the first straight line section close to the conical connecting section; the valve clack is arranged in the valve body and is of a cone frustum-shaped structure matched with the connecting section. The utility model has the advantages that the valve clack is in a cone frustum structure and seals the conical connection section of the valve body, when the gravity of the valve clack is smaller than the pressure at the inlet connection flange, the valve clack is jacked open to release the pressure, when the gravity of the valve clack is larger than or equal to the pressure at the inlet connection flange, the valve clack automatically resets, and the structure is simple; additionally, the utility model discloses a pressure release opening pressure's accurate control can be realized to the weight of control valve clack, can satisfy the demand of multiple different operating modes.
Description
Technical Field
The utility model relates to a fire extinguishing system especially relates to a gravity type relief valve for fire control water supply system.
Background
After receiving a fire alarm signal, the fire-fighting water supply system (including an indoor fire hydrant system and an automatic water spraying fire extinguishing system) automatically starts a fire-fighting water supply pump, the flow of the fire-fighting pump is gradually increased to a designed flow or is close to the designed flow from zero, and the lift of the fire-fighting water pump is gradually reduced to the designed lift from the highest point. When the fire pump does not discharge water, the flow rate of the fire pump is 1.2-1.4 times lower than the designed flow rate when the sample lift is really designed, the system pressure is high, and the fire pipeline is cracked due to overpressure operation. Therefore, an overpressure relief valve is often installed on a water outlet pipe of the fire pump.
The valve clack of an overpressure relief valve in the existing fire-fighting water supply system is mostly of a spring type structure, when the pressure of water is greater than the thrust of a spring, a pilot valve is opened, and the main valve starts to relieve the pressure; when the pressure of water is smaller than a set pressure relief value, the thrust of the pilot valve spring is larger than the pressure of the water, and the pilot valve clack is in a closed state. However, the opening pressure of the pressure release valve with the structure is difficult to determine at a certain specific value, and the pressure release valve often has definite pressure release opening pressure during actual use, so that the design difficulty of the spring type pressure release valve is increased, and the structure is complex. Therefore, how to design a fire-fighting pressure relief valve capable of accurately determining the pressure relief opening pressure is one of important problems to be solved in the industry.
Disclosure of Invention
An object of the utility model is to provide a gravity type relief valve for fire control water supply system can realize the accurate control of pressure release opening pressure through the weight of control valve clack, and simple structure.
In order to achieve the above purpose, the utility model adopts the following technical proposal:
a gravity type relief valve for fire control water supply system, including valve body and valve clack, its characterized in that: the valve body is of a shell structure and comprises a first straight line section, a conical connecting section and a second straight line section which are sequentially connected, and the inner diameter of the first straight line section is larger than that of the second straight line section;
an inlet connecting flange is arranged at the port of the second straight line section, the port of the first straight line section is connected with a sealing cover plate through a flange, and a pressure relief pipe is communicated and arranged on the first straight line section close to the conical connecting section;
the valve clack is arranged in the valve body and is of a cone frustum-shaped structure matched with the connecting section.
In the utility model, the valve clack is in a cone frustum structure with a big top and a small bottom, when the gravity of the valve clack is smaller than the pressure at the inlet connecting flange, the valve clack is jacked open to release the pressure, and when the gravity of the valve clack is larger than or equal to the pressure at the inlet connecting flange, the valve clack automatically resets, and the structure is simple; additionally, the utility model discloses a weight of control valve clack can realize the accurate control of pressure release opening pressure, can process into multiple different specifications with valve clack and valve body, starts from 1.0MPa like pressure release opening pressure to 0.05MPa upwards scales up, in order to satisfy multiple different work condition's demand.
Preferably, the lower part of the valve clack is provided with a first sealing ring, and the upper part of the valve clack is provided with a second sealing ring. The utility model discloses a first sealing washer and second sealing washer improve the sealing performance of valve clack and valve body.
The utility model discloses an among the preferred embodiment, the top of valve clack upwards extend be provided with first straight line segment complex straight line extension section, straight line extension section have the guide effect, provide the direction for the valve clack come-up, and then ensure the steady come-up and the reseing of valve clack.
The utility model has the advantages that the valve clack is in a big-end-small cone frustum-shaped structure and seals the conical connection section of the valve body, when the gravity of the valve clack is smaller than the pressure at the inlet connection flange, the valve clack is jacked open to release the pressure, when the gravity of the valve clack is larger than or equal to the pressure at the inlet connection flange, the valve clack automatically resets, and the structure is simple; additionally, the utility model discloses a weight of control valve clack can realize the accurate control of pressure release opening pressure, can process into multiple different specifications with valve clack and valve body, if pressure release opening pressure begins from 1.0MPa to upwards increase up by 0.05MPa, design into multiple different specifications, can satisfy the demand of multiple different operating mode.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Detailed Description
The following describes embodiments of the present invention in detail with reference to the drawings, which are implemented on the premise of the technical solution of the present invention, and detailed embodiments and specific operation procedures are provided, but the scope of the present invention is not limited to the following embodiments.
It is to be understood that, unless otherwise specifically stated or limited, the terms "mounted," "connected," and "connected" as used herein are intended to be broadly construed, and may include, for example, fixed connections, releasable connections, or integral connections; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those skilled in the art from the specific situation.
The utility model provides a gravity type relief valve for fire control water supply system can realize the accurate control of pressure release opening pressure through the weight of control valve clack 200. The concrete structure is as follows:
as shown in fig. 1, the gravity type relief valve for fire fighting water supply system of the present invention comprises a valve body and a valve flap 200 located in the valve body;
the valve body is of a shell structure made of ductile cast iron, cast steel or stainless steel, the valve body comprises a first straight line section 101 (in a cylindrical structure), a conical connecting section 102 and a second straight line section 106 (in a cylindrical structure, the diameter of the conical connecting section is smaller than that of the first straight line section 101), the first straight line section 101, the conical connecting section 102 and the second straight line section 106 are sequentially connected, an inlet connecting flange 103 is arranged at the port of the second straight line section 106, and the second straight line section 106 is connected with a water outlet pipe of the fire pump through the inlet connecting flange 103; the upper port of the first straight line segment 101 is connected with a sealing cover plate 104 through a flange; a pressure relief pipe 105 is communicated with the first straight line section 101 close to the conical connecting section 102, and when the system pressure is greater than the gravity of the valve clack 200, the valve clack 200 is jacked open and is relieved through the pressure relief pipe 105, so that the overlarge pressure of a fire-fighting system is avoided;
the valve flap 200 is a cone frustum structure matched with the conical connecting section 102, namely the valve flap 200 is a variable cross-section structure with a large upper part and a small lower part, so that the size of the valve body can be conveniently controlled. The valve clack 200 is in a normally closed state, the valve clack 200 is sealed and clamped in the conical connecting section 102, after the fire pump is started, the valve clack 200 is jacked open when the pressure at the position of the inlet connecting flange 103 is greater than the gravity of the valve clack 200, and part of water in the water outlet pipe enters the valve body and flows out from the pressure relief pipe 105 (the pressure relief pipe 105 can be connected with a fire pool), so that pressure relief is realized; the flap 200 automatically falls back when the pressure at the inlet connection flange 103 is less than or equal to the weight of the flap 200.
To ensure the sealing performance, a first sealing ring 301 is arranged at the lower part of the valve flap 200, and a second sealing ring 302 is arranged at the upper part of the valve flap 200, as shown in fig. 1. When the valve flap is actually installed, annular installation grooves are formed in the upper portion and the lower portion of the valve flap 200, and the first sealing ring 301 and the second sealing ring 302 are embedded in the annular installation grooves respectively.
When in actual processing, the upper part of the valve clack 200 is provided with a linear extension section 201 matched with the first linear section 101, and the linear extension section 201 has a guiding function, so that guiding is provided for floating and descending resetting of the valve clack 200, the valve clack 200 is enabled to lift in a balanced manner in the valve body, and the valve clack 200 is prevented from inclining.
In practical production, the valve flap 200 is made of stainless steel, and the first sealing ring 301 and the second sealing ring 302 are preferably rubber sealing rings (such as those made of epdm).
The utility model discloses the accurate control of pressure release opening pressure can be realized to accessible control valve clack 200's weight. Specifically, assume that the design operating pressure of the fire service water supply isP(unit: MPa), the opening pressure is set toP+0.1 (unit: MPa), the hydrostatic pressure F (F = (P + 0.1) × rr) at the inlet connection flange 103 2 ) The gravity of the valve flap 200 is equal to the hydrostatic pressure at the inlet connection flange 103, and the gravity of the valve flap 200 is the opening pressure. When the fire pump is started, the pressure of the water outlet pipe rises, so that the pressure at the position of the inlet connecting flange 103 is greater than the gravity of the valve clack 200, and the valve clack 200 is jacked open and decompressed; after the fire pump is opened for a period of time, when the pressure of inlet flange 103 department is less than or equal to the gravity of valve clack 200, valve clack 200 returns the seat automatically under the effect of its dead weight, the utility model discloses a valve self-closing.
Finally, it should be emphasized that the above-described embodiments are merely preferred embodiments of the present invention, and not intended to limit the invention, and although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications and variations can be made in the embodiments described above without inventive step or with equivalents of some features. Therefore, any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (3)
1. The utility model provides a gravity type relief valve for fire control water supply system, includes valve body and valve clack, its characterized in that: the valve body is of a shell structure and comprises a first straight line section, a conical connecting section and a second straight line section which are sequentially connected, and the inner diameter of the first straight line section is larger than that of the second straight line section;
an inlet connecting flange is arranged at the port of the second straight line section, the port of the first straight line section is connected with a sealing cover plate through a flange, and a pressure relief pipe is communicated and arranged on the first straight line section close to the conical connecting section;
the valve clack is arranged in the valve body and is of a cone frustum-shaped structure matched with the connecting section.
2. The gravity relief valve for a fire water supply system according to claim 1, wherein: the lower part of the valve clack is provided with a first sealing ring, and the upper part of the valve clack is provided with a second sealing ring.
3. The gravity relief valve for a fire water supply system according to claim 1, wherein: the top of the valve clack extends upwards to form a linear extension section matched with the first linear section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320183474.9U CN218845228U (en) | 2023-02-10 | 2023-02-10 | Gravity type pressure release valve for fire-fighting water supply system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320183474.9U CN218845228U (en) | 2023-02-10 | 2023-02-10 | Gravity type pressure release valve for fire-fighting water supply system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218845228U true CN218845228U (en) | 2023-04-11 |
Family
ID=87293189
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320183474.9U Active CN218845228U (en) | 2023-02-10 | 2023-02-10 | Gravity type pressure release valve for fire-fighting water supply system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218845228U (en) |
-
2023
- 2023-02-10 CN CN202320183474.9U patent/CN218845228U/en active Active
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