CN222937304U - A pressure relief valve capable of automatically adjusting the action value according to the water inlet pressure and a pump room using the same - Google Patents
A pressure relief valve capable of automatically adjusting the action value according to the water inlet pressure and a pump room using the same Download PDFInfo
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- CN222937304U CN222937304U CN202421078208.0U CN202421078208U CN222937304U CN 222937304 U CN222937304 U CN 222937304U CN 202421078208 U CN202421078208 U CN 202421078208U CN 222937304 U CN222937304 U CN 222937304U
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Abstract
The utility model belongs to the technical field of water fire control, and particularly relates to a pressure relief valve capable of automatically adjusting an action value according to water inlet pressure and a pump house using the pressure relief valve. The pressure relief valve comprises a main valve body, a pilot valve body and a guide pipe combination. The main valve body is divided into a valve front cavity A, a valve rear cavity B and a diaphragm upper cavity C from bottom to top through a valve core and a diaphragm, the valve core and the diaphragm are connected through a guide rod, the pilot valve body is divided into a pilot valve core lower cavity F, a pilot valve diaphragm lower cavity E and a pilot valve body diaphragm upper cavity D from bottom to top through a pilot valve core and a pilot valve diaphragm, the pilot valve core and the pilot valve diaphragm are connected with a screw rod through a spring, and the guide tube combination comprises a plurality of guide tubes connected between the main valve body and the pilot valve body. In the municipal water supply fire-fighting system, the utility model can effectively improve the action accuracy value of the pressure relief valve, ensure the safe and reliable operation of the fire-fighting system, achieve the purpose of adjusting the action value of the pressure relief valve according to the water inlet pressure through the connection of the communicating pipe, has simple structure and is convenient for installation and maintenance.
Description
Technical Field
The utility model belongs to the technical field of water fire control, and particularly relates to a pressure relief valve capable of automatically adjusting an action value according to water inlet pressure and a pump house using the pressure relief valve.
Background
The technical specification of fire-fighting water supply and fire hydrant system GB50974-2014, 5.1.6, prescribes that the flow lift performance curve of the fire-fighting pump is a smooth curve without hump and inflection point, and the pressure at zero flow is not more than 140% of the design working pressure, and is preferably more than 120% of the design working pressure. Meanwhile, 5.1.16 prescribes that the temporary high-pressure fire water supply system should take technical measures for preventing the low-flow idle running overheat of the fire water pump. The pressure relief valve is arranged on the water outlet main pipe of the fire pump during design, the action pressure of the pressure relief valve is set to be 120% -140% of the lift of the water pump, and when the pressure in the pipe network is too high and the flow of the water pump is small, the pressure relief valve discharges water to prevent the water pump from idling and overheat.
The technical specification of fire-fighting water supply and hydrant system GB50974-2014, item 4.2.1, namely, when a municipal water supply pipe network is used for continuously supplying water, the fire-fighting water supply system can directly supply water by adopting the municipal water supply pipe network, and the technical specification of subway design fire-fighting standard GB51298-2018, item 7.1.2, namely, the fire-fighting water is preferably supplied by the municipal water supply pipe network. A considerable part of fire-fighting systems, especially subway fire-fighting systems, mostly adopt municipal direct supply fire-fighting water, so that the action pressure of the pressure relief valve cannot only consider the lift of the fire-fighting pump, but also consider the influence of municipal pressure superposition. In this case, the pressure of the pressure relief valve is usually set according to "pump lift× (1.2 to 1.4) +municipal water pressure)".
The pump lift is designed to be P, the zero-flow pump lift is less than or equal to 1.4P, the municipal water inlet design water pressure is P0, the fire-fighting pipe network design dynamic pressure is P+P0, and the pressure relief valve action value is P1=1.4P+P0. However, when municipal water pressure is high in peak and low in valley, water pressure fluctuation is large, particularly subway engineering is built in urban areas with dense personnel and large water consumption, the municipal water pressure fluctuation range value is P0±DeltaP, when the water is used in the valley, a fire pump is started, municipal water pressure is high, the maximum municipal water pressure is P0 max =P0+ DeltaP, the fire pump starting pressure is about 1.4P, the pressure of a fire pipe network after the pump is=1.4P+P0+ DeltaP=P1+ DeltaP > P1, which is equivalent to that the fire extinguishing system reaches the action value of a pressure relief valve in the starting stage, so that the pressure relief valve is started to drain water, and fire extinguishing is affected. When the water is in a peak, the minimum municipal water pressure is P min =P0-DeltaP, the pressure of the fire-fighting pipe network after the fire-fighting water pump is=1.4P+P0-DeltaP=P1-DeltaP < P1, namely, when the fire-fighting water pump is operated at a low flow, the fire-fighting water pump is 1.4P < pump lift < P1- (P0-DeltaP), at the moment, the condition that the fire-fighting water pump idles at a low flow can occur, the pressure of the system is not released yet is not touched, and meanwhile, the pressure control of the fire-fighting system is deviated.
Therefore, the development and design of the relief valve capable of automatically adjusting the action value according to the inlet water pressure eliminates the influence of municipal water pressure fluctuation on the action of the relief valve, and the relief valve becomes a current urgent problem to be solved.
Disclosure of utility model
The utility model provides a pressure relief valve capable of automatically adjusting an action value according to water inlet pressure, which can effectively eliminate adverse effects of municipal water pressure fluctuation on system pressure relief and improve the action accuracy of the pressure relief valve in a municipal direct water supply fire-fighting system.
The technical scheme adopted by the utility model for solving the problem is as follows:
a pressure relief valve capable of automatically adjusting an action value according to a water inlet pressure, comprising:
The main valve body is divided into a valve front cavity A, a valve rear cavity B and a diaphragm upper cavity C from bottom to top through a valve core and a diaphragm, and the valve core is connected with the diaphragm through a guide rod;
The pilot valve body is internally divided into a pilot valve core lower cavity F, a pilot valve diaphragm lower cavity E and a pilot valve body diaphragm upper cavity D from bottom to top through a pilot valve core and a pilot valve diaphragm, and the pilot valve core and the pilot valve diaphragm are connected with a screw rod through a spring;
A conduit assembly includes a plurality of conduits connected between a main valve body and a pilot valve body.
In one aspect, the catheter assembly comprises:
One end of the first guide pipe is connected with the valve front cavity A, and the other end of the first guide pipe is respectively connected with the diaphragm upper cavity C and the pilot valve diaphragm lower cavity E through a branch pipe;
One end of the second guide tube is connected with the upper cavity C of the diaphragm, and the other end of the second guide tube is connected with the lower cavity F of the pilot valve core;
And one end of the third guide tube is connected with the valve back cavity B, and the other end of the third guide tube is connected with the pilot valve core lower cavity F.
In one technical scheme, a Y-shaped filter and a stop valve are arranged on the guide pipe.
In one embodiment, the catheter is provided with a pressure gauge.
In one technical scheme, the upper end of the screw rod penetrates through the pilot valve body and is in threaded connection with the pilot valve body, and the length of the spring can be adjusted by rotating the screw rod so as to adjust the pressing force of the spring.
In one technical scheme, the pilot valve body diaphragm upper cavity D is connected with a water pump water inlet pipe through a connecting pipe and used for conducting water pressure in the water suction pipe to the pilot valve diaphragm upper cavity D.
In one technical scheme, one end of the connecting pipe is connected to the pilot valve diaphragm upper cavity D, and a threaded interface is reserved at the other end of the connecting pipe.
In one technical scheme, a stop valve and a Y-shaped filter are arranged on the connecting pipe.
The second invention aims to provide a pump room applying the pressure relief valve capable of automatically adjusting the action value according to the water inlet pressure, wherein a water inlet main pipe of a water pump in the pump room is connected to a municipal water supply pipe, a water outlet main pipe of the water pump is connected to a fire hydrant pipe network, the water outlet main pipe of the water pump is further provided with the pressure relief pipe, the pressure relief valve is integrally arranged on the pressure relief pipe, an upper cavity D of a diaphragm of a valve body of the pilot valve is connected to the water inlet main pipe of the water pump in the pump room through a connecting pipe, and water pressure in the water inlet main pipe of the water pump is conducted to the upper cavity D of the diaphragm of the pilot valve through the connecting pipe.
In one technical scheme, a valve front cavity A of the main valve body is connected with a water inlet side of the pressure relief pipe, and a valve rear cavity B of the main valve body is connected with a water outlet side of the pressure relief pipe.
The utility model has the advantages and positive effects that:
1. In the fire-fighting system with municipal direct water supply, the utility model can effectively promote the accurate action value of the pressure release valve and ensure the safe and reliable operation of the fire-fighting system.
2. The utility model can achieve the purpose of adjusting the action value of the pressure relief valve according to the water inlet pressure through the connection of the communicating pipe, has simple structure and is convenient for installation and maintenance.
3. The utility model has better application prospect, especially in subway fire engineering.
Drawings
The technical solution of the present utility model will be described in further detail below with reference to the accompanying drawings and examples, but it should be understood that these drawings are designed for the purpose of illustration only and thus are not limiting the scope of the present utility model. Moreover, unless specifically indicated otherwise, the drawings are intended to conceptually illustrate the structural configurations described herein and are not necessarily drawn to scale.
FIG. 1 is a schematic view of the internal structure of the present utility model;
fig. 2 is a schematic installation view of the present utility model.
In figure 1, a main valve body, 2, a valve core, 3, a pilot valve body, 4, a spring, 5, a pilot valve core, 6, a diaphragm, 7, a guide rod, 8, a screw rod, 9, a pressure gauge, 10, a Y-shaped filter, 11, a stop valve, 12, a connecting pipe, 13, a first guide pipe, 14, a second guide pipe, 15, a third guide pipe, 16, a pilot valve diaphragm, 17, a threaded interface, 18 and a water pump.
Detailed Description
First, it should be noted that the following detailed description of the specific structure, characteristics, advantages, and the like of the present utility model will be given by way of example, however, all descriptions are merely illustrative, and should not be construed as limiting the present utility model in any way. Furthermore, any single feature described or implied in the embodiments mentioned herein, or any single feature shown or implied in the figures, may nevertheless be continued in any combination or pruning between these features (or equivalents thereof) to obtain still further embodiments of the utility model that may not be directly mentioned herein. In addition, for the sake of simplicity of the drawing, identical or similar features may be indicated at one point in the same drawing.
In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "configured," "connected," "secured," "screwed," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed, mechanically connected, electrically connected, directly connected, or indirectly connected through an intermediate medium, and may be a communication between two elements or an interaction relationship between two elements, unless explicitly specified otherwise, and it will be understood by those of ordinary skill in the art that the above terms are in specific terms of the present utility model as appropriate. The present utility model will be described in detail with reference to the accompanying drawings.
Example 1
The utility model provides a pressure release valve of action value can be adjusted according to intake pressure automatically, includes main valve body 1, pilot valve body 3 and pipe combination etc. wherein:
The main valve body 1 is divided into a valve front cavity A, a valve rear cavity B and a diaphragm upper cavity C from bottom to top through a valve core 2 and a diaphragm 6, and the valve core 2 and the diaphragm 6 are connected through a guide rod 7;
the pilot valve body 3 is divided into a pilot valve core lower cavity F, a pilot valve diaphragm lower cavity E and a pilot valve body upper cavity D from bottom to top through a pilot valve core 5 and a pilot valve diaphragm 16, and the pilot valve core 5 and the pilot valve diaphragm 16 are connected with the screw rod 8 through a spring 4;
A conduit combination comprising a plurality of conduits connected between a main valve body 1 and a pilot valve body 3.
As shown in figure 1, a main valve body 1 of the pressure relief valve comprises a guide rod 7, a diaphragm 6, a valve core 2 and the like, the diaphragm 6 and the valve core 2 are connected by the guide rod 7 in the main valve body 1, the area of the diaphragm 6 is larger than that of the valve core 2, the main valve body 1 is divided into a diaphragm upper cavity C, a valve front cavity A and a valve rear cavity B, the pilot valve body 3 of the pilot valve comprises a screw rod 8, a spring 4, a pilot valve diaphragm 16, a pilot valve core 5 and the like, the pilot valve body 3 is connected with the pilot valve core 5 and the pilot valve diaphragm 16 by the screw rod 8 and sleeved in the spring 4, the pressing force of the spring 4 can be adjusted by adjusting the length of the spring 4, the pilot valve diaphragm 16 divides the pilot valve body 3 into a diaphragm upper cavity D and a diaphragm lower cavity E, the diaphragm lower cavity E is connected with the main valve by a guide pipe, the diaphragm upper cavity D is also connected with a pump front pipeline of a water pump 18 by a connecting pipe 12, and the front water pressure is led into the diaphragm upper cavity D of the pilot valve body 3 by the pressing force of the spring and the pressure of the pump front pipeline is determined by the pressing force of the spring and the pressure of the front pipeline of the pump.
Still further, it is also contemplated in this embodiment that the catheter assembly includes:
The first guide pipe 13 is connected with the valve front cavity A at one end and the diaphragm upper cavity C and the pilot valve diaphragm lower cavity E at the other end respectively through a branch pipe, wherein the diaphragm upper cavity C is connected to the main valve front cavity A through the first guide pipe 13 and is used for transmitting the water pressure of the pilot valve front cavity A to the diaphragm upper cavity C;
a second conduit 14, one end of which is connected with the upper cavity C of the diaphragm and the other end of which is connected with the lower cavity F of the pilot valve core;
And one end of the third guide pipe 15 is connected with the valve rear cavity B, and the other end of the third guide pipe is connected with the pilot valve lower cavity F, so as to drain water in the main valve diaphragm upper cavity C.
Furthermore, in this embodiment, it may be considered that the Y-shaped filter and the stop valve are disposed on the conduit 13, so as to prevent impurities from blocking the conduit and facilitate disassembly and maintenance.
Further, it is also contemplated in this embodiment that a pressure gauge is provided on the conduit 13 for measuring the water pressure in the pipe to determine the pressure value of the pressure relief valve.
Still further, it is also contemplated in this embodiment that the upper end of the screw 8 passes through the pilot valve body 3 and is screwed with the pilot valve body 3, and the length of the spring 4 can be adjusted by rotating the screw 8 to adjust the pressing force of the spring.
Further, it is also contemplated in this embodiment that the upper cavity D of the pilot valve body is connected to the water inlet pipe of the water pump through the connecting pipe 12, so as to conduct the water pressure in the water suction pipe to the upper cavity D of the pilot valve body.
Furthermore, it can be considered in this embodiment that the connecting pipe 12 is the key point of this technical scheme, and this relief valve product is supporting connecting pipe 12 of a section standard length, the one end of connecting pipe 12 connects to pilot valve diaphragm upper chamber D, and the other end reserves screwed joint 17, and pilot valve body diaphragm upper chamber D is connected with the water pump suction pipe through connecting pipe 12, is used for conducting the interior water pressure of suction pipe to pilot valve diaphragm upper chamber D, and when the installation, combines the actual conditions in different pump rooms, can be supporting corresponding connecting pipe to with the last reserved screwed joint butt joint of pilot valve connecting pipe can.
Furthermore, in this embodiment, it may be considered that the stop valve 11 and the Y-shaped filter 10 are disposed on the connection pipe 12, so as to prevent impurities from blocking the conduit and facilitate disassembly and maintenance.
Example 2
The pump house of the relief valve of application embodiment 1, can be according to the automatic regulation action value of intake pressure, the intake manifold joint of the water pump 18 in the pump house is to municipal administration feed pipe, the outlet manifold joint of water pump 18 is to the fire hydrant pipe network, still install the relief pipe on the outlet manifold of water pump 18, the relief valve is whole to be installed on the relief pipe, pilot valve body diaphragm upper chamber D is connected to the intake manifold of water pump 18 in the pump house through connecting pipe 12, through connecting pipe 12 with the water pressure conduction in the water pump intake manifold to pilot valve diaphragm upper chamber D.
Furthermore, in this embodiment, it may be considered that the front valve chamber a of the main valve body 1 is connected to the water inlet side of the pressure relief pipe, and the rear valve chamber B of the main valve body 1 is connected to the water outlet side of the pressure relief pipe, and the arrow direction in the figure represents the water flow direction.
The implementation process of the embodiment comprises the following steps:
Referring to the pressure relief valve installation position shown in fig. 2, the water pressure in the water inlet pipe of the water pump, i.e., municipal water pressure P0, can be conducted to the pilot valve diaphragm upper chamber D through the connecting pipe 12. Meanwhile, the length of the spring 4 can be compressed or loosened by adjusting the screw rod 8 on the pilot valve, so that the pressing force of the spring 4 is adjusted, the pressing force is P2, and the pressure value P2=PX (1.2-1.4) is adjusted according to related specification requirements. The operation pressure value of the relief valve is set to p1=p2+p0=p× (1.2 to 1.4) +p0. When the water pressure of the valve front A rises to be more than P1, water flows into the pilot valve diaphragm lower cavity E through the guide pipe 13, the spring 4 is compressed under the action of the water pressure, the pilot valve core 5 rises, at the moment, the water in the main valve diaphragm upper cavity C is discharged through the guide pipes 14 and 15, the main valve core 2 is opened under the action of the water pressure of the valve front A, and the water flow is discharged, so that the aim of pressure relief of a pipeline is fulfilled.
When the water pressure of the front part A of the main valve is reduced to be smaller than P1, the water pressure of the lower cavity E of the guide valve diaphragm is reduced, the guide valve core is closed under the combined action of the spring and the water pressure of the upper cavity of the guide valve, the upper cavity C of the main valve diaphragm stops draining, and water is continuously replenished through the guide pipe 13. When the water pressure in the upper cavity C of the diaphragm is consistent with the water pressure in the valve body A, the area of the diaphragm is larger than that of the valve core, so that the valve core 2 is closed under the action of pressure difference, and the pressure release of the pipeline is stopped at the moment.
The effect of the automatic regulation action pressure value of the pressure reducing valve is mainly described, the pilot valve diaphragm upper cavity D is connected with the water inlet pipe of the water pump through a connecting pipe 12, and municipal water pressure P0 is conducted to the pilot valve diaphragm upper cavity D. By adjusting the spring length, the operating pressure value of the relief valve is determined to be p1=p2+p0. When the water pump is in operation, the water pressure in front of the main valve of the pressure relief valve is the sum of municipal water pressure P0 and the pressurization of the water pump, and the water pressure is led into the diaphragm lower cavity E through the conduit 13. Namely, municipal water pressure is led into the positions of the upper cavity D and the lower cavity E of the guide valve diaphragm, municipal water pressure on two sides of the diaphragm are mutually offset, and fluctuation of municipal water pressure P0 is mutually offset. In practical use, the pressure relief valve can automatically adjust the action value according to the water inlet pressure, and can be used for 'filtering' the influence of municipal water pressure fluctuation, so that the accuracy of the action pressure value is improved, the fire protection system can accurately and timely relieve pressure, and the stability and reliability of the fire protection system are ensured.
It should be noted that the above-mentioned embodiments are merely for illustrating the technical solution of the present utility model, and not for limiting the same, and although the present utility model has been described in detail with reference to the above-mentioned embodiments, it should be understood by those skilled in the art that the technical solution described in the above-mentioned embodiments may be modified or some or all of the technical features may be equivalently replaced, and these modifications or substitutions do not deviate from the essence of the corresponding technical solution from the scope of the technical solution of the embodiment of the present utility model.
The foregoing examples illustrate the utility model in detail, but are merely preferred embodiments of the utility model and are not to be construed as limiting the scope of the utility model. All equivalent changes and modifications within the scope of the present utility model are intended to be covered by the present utility model.
Claims (10)
1. The pressure release valve capable of automatically adjusting the action value according to the water inlet pressure is characterized by comprising:
The main valve body (1) is divided into a valve front cavity A, a valve rear cavity B and a diaphragm upper cavity C from bottom to top through a valve core (2) and a diaphragm (6), and the valve core (2) is connected with the diaphragm (6) through a guide rod (7);
the pilot valve body (3) is internally divided into a pilot valve core lower cavity F, a pilot valve diaphragm lower cavity E and a pilot valve body upper cavity D from bottom to top through a pilot valve core (5) and a pilot valve diaphragm (16), and the pilot valve core (5) and the pilot valve diaphragm (16) are connected with a screw rod (8) through a spring (4);
a conduit combination comprising a plurality of conduits connected between a main valve body (1) and a pilot valve body (3).
2. The pressure relief valve of claim 1, wherein the actuation value is automatically adjustable based on the inlet pressure, and wherein: the catheter assembly includes:
A first guide pipe (13) with one end connected with the valve front cavity A and the other end connected with the diaphragm upper cavity C and the pilot valve diaphragm lower cavity E through branch pipes respectively;
a second guide tube (14) with one end connected with the upper cavity C of the diaphragm and the other end connected with the lower cavity F of the pilot valve core;
And one end of the third guide pipe (15) is connected with the valve back cavity B, and the other end of the third guide pipe is connected with the pilot valve core lower cavity F.
3. The pressure release valve capable of automatically adjusting an action value according to the inlet water pressure according to claim 2, wherein the guide pipe (13) is provided with a Y-shaped filter and a stop valve.
4. A pressure relief valve with automatic regulation of the action value according to the inlet water pressure as claimed in claim 2, characterized in that the conduit (13) is provided with a pressure gauge.
5. The pressure relief valve capable of automatically adjusting an action value according to the inflow pressure according to claim 1, wherein the upper end of the screw rod (8) penetrates through the pilot valve body (3) and is in threaded connection with the pilot valve body (3), and the length of the spring (4) can be adjusted by rotating the screw rod (8) so as to adjust the pressing force of the spring.
6. The pressure relief valve capable of automatically adjusting an action value according to the inlet water pressure according to claim 1, wherein the pilot valve body diaphragm upper cavity D is connected with a water inlet pipe of a water pump (18) through a connecting pipe (12) and is used for conducting the water pressure in the water inlet pipe to the pilot valve diaphragm upper cavity D.
7. The pressure relief valve capable of automatically adjusting an action value according to the inlet water pressure according to claim 6, wherein one end of the connecting pipe (12) is connected to the upper cavity D of the pilot valve diaphragm, and a threaded interface (17) is reserved at the other end of the connecting pipe.
8. The pressure release valve capable of automatically adjusting an action value according to the inlet water pressure according to claim 6, wherein the connecting pipe (12) is provided with a stop valve (11) and a Y-shaped filter (10).
9. A pump house using the pressure relief valve capable of automatically adjusting an action value according to the water inlet pressure as set forth in any one of claims 1-8, wherein a water inlet main pipe of a water pump (18) in the pump house is connected to a municipal water supply pipe, a water outlet main pipe of the water pump (18) is connected to a fire hydrant pipe network, and the pressure relief pipe is further arranged on the water outlet main pipe of the water pump (18), and the pressure relief valve is integrally arranged on the pressure relief pipe, a valve body diaphragm upper cavity D of the pilot valve is connected to the water inlet main pipe of the water pump (18) in the pump house through a connecting pipe (12), and the water pressure in the water inlet main pipe of the water pump (18) is conducted to the valve diaphragm upper cavity D through the connecting pipe (12).
10. The pump house of claim 9, wherein the front valve cavity A of the main valve body (1) is connected with the water inlet side of the pressure relief pipe, and the rear valve cavity B of the main valve body (1) is connected with the water outlet side of the pressure relief pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202421078208.0U CN222937304U (en) | 2024-05-17 | 2024-05-17 | A pressure relief valve capable of automatically adjusting the action value according to the water inlet pressure and a pump room using the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202421078208.0U CN222937304U (en) | 2024-05-17 | 2024-05-17 | A pressure relief valve capable of automatically adjusting the action value according to the water inlet pressure and a pump room using the same |
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| Publication Number | Publication Date |
|---|---|
| CN222937304U true CN222937304U (en) | 2025-06-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202421078208.0U Active CN222937304U (en) | 2024-05-17 | 2024-05-17 | A pressure relief valve capable of automatically adjusting the action value according to the water inlet pressure and a pump room using the same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN222937304U (en) |
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2024
- 2024-05-17 CN CN202421078208.0U patent/CN222937304U/en active Active
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