Alarm valve special for chemical engineering
By incorporating a pressure-stabilizing outlet pipe, a pressure regulating valve, and a heat-insulating coating into the alarm valve, the problem of high-temperature evaporation during deflagration in chemical plants was solved, achieving both pressure stabilization and leak-proof performance.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-19
- Publication Date
- 2026-03-24
AI Technical Summary
When existing alarm valves encounter deflagration in chemical plants, the high-temperature flames cause water to evaporate rapidly, leading to a sharp increase in pressure. This may abnormally trigger fire sprinklers, resulting in water leakage.
A chemical-specific alarm valve was designed, which uses a pressure-stabilized water outlet pipe, a pressure regulating valve, a heat insulation coating, a vacuum jacket, and a sealing structure. The valve opening is controlled by water vapor pressure to prevent excessive pressure from causing water leakage.
It effectively prevents excessive pressure caused by high-temperature burning, avoids abnormal triggering of fire sprinklers, and ensures stable water output and system safety.
Smart Images
Figure CN224033159U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to valve technical field, concretely relates to a special alarm valve for chemical industry. BACKGROUND
[0002] The alarm valve is a core control component in the automatic water spraying fire extinguishing system, is used for connecting or cutting off the water source when the fire occurs, triggers the alarm signal and starts the fire-fighting linkage equipment, and the alarm valve is a kind of check valve, and the opening or closing of valve clack is realized by pressure change, controls water flow to enter fire extinguishing pipe network, is opened automatically or manually when fire, allows water flow to enter pipe network and sprays water to extinguish fire, and can cooperate with water hammer alarm, pressure switch and other devices to issue sound and light alarm, and link the fire pump, when fire occurs, fire nozzle will be broken by heat, and water in pipeline is sprayed outward, thereby causing the pressure of system side of alarm valve to drop, and then the valve clack is opened by pressure difference to supply water, and water flow triggers alarm device, which is sensitive and effectively prevents fire spreading.
[0003] Although the above prior art can solve the corresponding technical problems, there are still some defects: when the existing alarm valve is used in the chemical plant, if the explosion phenomenon occurs in the workshop inside the chemical plant where the alarm valve is installed, and the fire has not extended to the position where the fire nozzle is installed, at this time, the alarm valve will be roasted by high-temperature flame, and the water in it will be rapidly evaporated by high temperature, and the chemical raw materials often have high combustibility, which will cause the pressure in the inner cavity of the alarm valve to rise sharply, and the pressure at the output end of the alarm valve will be larger than normal, which will cause the fire nozzle to be triggered abnormally, and water leakage will occur. UTILITY MODEL CONTENTS
[0004] The utility model aims at the defects and deficiencies of prior art, and provides a special alarm valve for chemical industry with stable pressure and anti-burning.
[0005] To achieve the above object, the utility model adopts the following technical scheme: a special alarm valve for chemical industry, including valve body and the blocking block that is arranged in the inner cavity of valve body, the valve body top is equipped with signal valve cover, the signal valve cover is equipped with the lift valve core that the bottom is attached with the inner wall of blocking block, the lift valve core top is equipped with pressure spring, the valve body water outlet is connected with pressure stabilization outlet pipe, the pressure stabilization outlet pipe includes pipe body and the constant pressure valve that is arranged in the pipe body outer wall, the constant pressure valve includes the lead-out pipe that is arranged in the pipe body outer wall and the inner collection block that is integrally formed in the lead-out pipe outer wall bottom, the inner collection block inner wall is attached with the push-up block, the lead-out pipe is integrally formed with the horizontal plate above the inner collection block, and the pressure column is arranged between the horizontal plate bottom surface and the push-up block top surface.
[0006] Further improvement is that the pipe body inner wall is provided with a heat insulation coating.
[0007] Further improvement is that the pipe body is internally provided with a vacuum interlayer.
[0008] Further improvement is that the pipe body is internally provided with a vacuum interlayer.
[0009] Further improvement is that the pipe body is internally provided with a vacuum interlayer.
[0010] Further improvement is that the pipe body is internally provided with a vacuum interlayer.
[0011] After the technical scheme is applied, the beneficial effects of the present application are as follows: when the valve body and the pressure-stable water outlet pipe are subjected to high-temperature burning, the water flow in the pipe body of the pressure-stable water outlet pipe is evaporated, so that the pressure is increased, the high-pressure water vapor is introduced into the constant-pressure valve, and the pressure of the water vapor is used to push the push block upward, so that the push block no longer seals the inner cavity of the inward-retracting block, and the water vapor with excessive pressure can be discharged outward, preventing the pressure in the water pipe connected with the alarm valve from being increased due to excessive pressure, and avoiding the fire-fighting spray head from being abnormally triggered. BRIEF DESCRIPTION OF DRAWINGS
[0012] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.
[0013] Fig. 1 is a structure schematic view of a front view section of the alarm valve of the present application;
[0014] Fig. 2 is a structure schematic view of a front view section of the pressure-stable water outlet pipe of the present application;
[0015] Fig. 3 is a structure schematic view of a front view section of the constant-pressure valve of the present application. DETAILED DESCRIPTION
[0016] The present application will be further described in combination with the drawings and specific embodiments.
[0017] Referring to Figs. 1-3The technical scheme adopted in the embodiment is shown as follows: a special alarm valve for chemical industry, comprising a valve body 1 and a blocking block 2 arranged in the inner cavity of the valve body 1, a signal valve cover 3 arranged at the top of the valve body 1, a lifting valve core 5 slidably arranged in the signal valve cover 3 and abutting against the inner wall of the blocking block 2, a pressure spring 4 arranged at the top end of the lifting valve core 5, a pressure-stable water outlet pipe 7 connected to the water outlet end of the valve body 1, the pressure-stable water outlet pipe 7 comprising a pipe body 71 and a pressure-keeping valve 75 penetratingly arranged on the outer wall of the pipe body 71, the pressure-keeping valve 75 comprising a lead-out pipe 21 penetratingly arranged on the outer wall of the pipe body 71 and an inwardly retracting block 22 integrally formed on the bottom of the outer wall of the lead-out pipe 21, an upper pushing block 23 abutting against the inner wall of the inwardly retracting block 22, a horizontal plate 25 integrally formed on the upper part of the inwardly retracting block 22, and a pressure column 24 arranged between the bottom surface of the horizontal plate 25 and the top surface of the upper pushing block 23. In use, one end of the valve body 1 is connected to a water inlet pipe, and the other end of a water outlet pipe provided with a fire sprinkler is connected to the pressure-stable water outlet pipe 7 on one side of the valve body 1. When the fire sprinkler is triggered due to a fire, the water in the water outlet pipe is sprayed out, thereby causing a pressure difference between the water inlet end and the water outlet end of the valve body 1, and the water pressure pushes the lifting valve core 5 upward, so that the water flows through the valve body 1 and continuously flows out to the water outlet pipe and the fire sprinkler. When the valve body 1 and the pressure-stable water outlet pipe 7 are burned by high temperature, the water in the pipe body 71 of the pressure-stable water outlet pipe 7 evaporates, thereby increasing the pressure. At this time, the high-pressure water vapor is introduced into the pressure-keeping valve 75, and the pressure of the water vapor pushes the upper pushing block 23 of the pressure-keeping valve 75 upward, and squeezes the pressure column 24 to make it retract. The pressure column 24 needs a certain pressure to be retracted and deformed, thereby ensuring that it will not be squeezed and deformed to cause water leakage in normal use. Thus, the upper pushing block 23 no longer seals the inner cavity of the inwardly retracting block 22, and the water vapor with excessive pressure can be discharged outward along the pipe body 71, thereby preventing the pressure in the water pipe connected to the alarm valve from increasing due to excessive pressure, and avoiding the fire sprinkler from being abnormally triggered.
[0018] A heat insulation coating 72 is arranged on the inner wall of the pipe body 71, which is beneficial to reduce the heat conduction efficiency of the pipe body 71, thereby reducing the heat received by the water in the pipe body 71 and reducing the pressure in the inner cavity of the pipe body 71 when it is roasted.
[0019] A vacuum interlayer 74 is further arranged in the pipe body 71, which is beneficial to further reduce the heat conduction efficiency, thereby reducing the evaporation amount of the water and reducing the pressure in the inner cavity of the pipe body 71 when it is roasted.
[0020] A connecting flange 73 is arranged at the end of the pipe body 71, which is beneficial to make the connection of the connecting flange 73 to the water outlet pipe more simple and fast.
[0021] The top end of the guide pipe 21 is further provided with a sealing pressure pipe 27 made of silica gel, the upper end of the sealing pressure pipe 27 is attached with a cover plate 28, a back-pulling elastic sheet 29 is arranged between the bottom surface of the cover plate 28 and the top surface of the horizontal plate 25, when the steam moves upward, if the steam pressure is small, only the inner collecting block 22 can be passed through, when continuously moving upward, enough pressure is needed to resist the elastic force of the back-pulling elastic sheet 29, the cover plate 28 is opened to output the steam outward, in the case that no steam is generated and only water flow pressure fluctuates, the water flow can be prevented from being abnormally leaked outward, and the water leakage phenomenon during use is further avoided.
[0022] The bottom end of the sealing pressure pipe 27 is provided with a limiting boss 26 fixedly connected with the top end of the guide pipe 21, which is beneficial to avoid that the cover plate 28 is pressed too much to cause the sealing pressure pipe 27 to be distorted and damaged.
[0023] The utility model discloses a working principle: the utility model discloses when using, the valve body 1 one end is connected to the water inlet pipeline, and the water outlet pipeline other end with the valve body 1 one side's pressure stabilization water outlet pipe 7 is connected with the fire monitor, when the fire monitor is triggered when generating the fire, the water in the water outlet pipeline will be sprayed, and then the water inlet end and the water outlet end of the valve body 1 generate pressure difference, and then the water pressure is used to lift the valve core 5, and then the water flow is outputted to the water outlet pipeline and the fire monitor through the valve body 1 and continues, when using, if the valve body 1 and the pressure stabilization water outlet pipe 7 are burnt by high temperature, at this time, the water flow in the pipe body 71 of the pressure stabilization water outlet pipe 7 can evaporate, and then the pressure increases, at this time, the high-pressure water vapor can be introduced into the pressure valve 75, and the push block 23 of the pressure valve 75 is pushed up through the pressure of the water vapor, and the pressure column 24 is extruded to make it contract, the pressure column 24 needs a certain pressure to generate contraction deformation, and then the push block 23 is not closed in the inner cavity of the inner collecting block 22, and then the water vapor with excessive pressure can be discharged outward along the pipe body 71, the pressure in the water pipe connected with the alarm valve is prevented from increasing due to excessive pressure, and the fire monitor is prevented from being abnormally triggered.
[0024] The utility model discloses a structure of product, the model of each element is not the content of the utility model protection, is the known technology, and the element of the market that can realize the above-mentioned function of the utility model can be as a kind of selection application.Therefore the model of element and the like parameters are not described in detail in the utility model.The contribution of the utility model is that each element is combined scientifically.
[0025] The basic principle and main features of the utility model and its advantages are shown and described above, and the person skilled in the art should understand that the utility model is not limited by the above examples, and the above examples and the description in the description are only to illustrate the principle of the utility model, and various changes and improvements can be made to the utility model without departing from the spirit and scope of the utility model, and these changes and improvements all fall within the scope of the utility model claimed, and the scope of protection of the utility model is defined by the appended claims and their equivalents. The utility model is not described in detail, which is the known technology of the person skilled in the art.
Claims
1. A chemical alarm valve, comprising a valve body (1) and a blocking block (2) disposed within the inner cavity of the valve body (1), wherein a signal valve cover (3) is provided on the top of the valve body (1), and a lifting valve core (5) with its bottom attached to the inner wall of the blocking block (2) is slidably disposed within the signal valve cover (3), and a pressure spring (4) is provided at the top of the lifting valve core (5), characterized in that: The valve body (1) is connected to a pressure-stabilized outlet pipe (7) at the outlet end. The pressure-stabilized outlet pipe (7) includes a pipe body (71) and a pressure-regulating valve (75) that penetrates the outer wall of the pipe body (71). The pressure-regulating valve (75) includes an outlet pipe (21) that penetrates the outer wall of the pipe body (71) and an inner block (22) integrally formed on the bottom of the outer wall of the outlet pipe (21). An upper push block (23) is attached to the inner wall of the inner block (22). A horizontal plate (25) is integrally formed above the inner block (22) of the outlet pipe (21). A pressure column (24) is provided between the bottom surface of the horizontal plate (25) and the top surface of the upper push block (23).
2. The alarm valve for chemical industry use according to claim 1, characterized in that: The inner wall of the tube (71) is provided with a heat insulation coating (72).
3. The alarm valve for chemical industry use according to claim 1, characterized in that: The tube (71) is also provided with a vacuum interlayer (74).
4. The alarm valve for chemical industry use according to claim 1, characterized in that: The pipe body (71) is provided with a connecting flange (73) at its end.
5. The alarm valve for chemical industry use according to claim 1, characterized in that: The top of the outlet tube (21) is also provided with a silicone sealing tube (27), and the upper end of the sealing tube (27) is attached to a cover plate (28). A pull-back elastic sheet (29) is provided between the bottom surface of the cover plate (28) and the top surface of the horizontal plate (25).
6. The alarm valve for chemical industry use according to claim 5, characterized in that: The bottom end of the sealing pressure tube (27) is provided with a limiting boss (26) that is fixedly connected to the top end of the outlet tube (21).