Constant-pressure water supply equipment for life fire fighting
By designing the first water change assembly and the second water change assembly in the domestic fire constant pressure water supply equipment, the problem that existing equipment needs to close the water supply system when changing water is solved, and the water supply is not interrupted during the water change process is achieved, continuous water supply services are ensured and equipment life is extended.
Patent Information
- Application Number
- CN202422038405.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-22
- Publication Date
- 2025-06-27
- Estimated Expiration
- 2034-08-22
AI Technical Summary
The existing fire-fighting constant pressure water supply equipment needs to close the entire water supply system during the water change process, resulting in interruption of water supply, especially inconvenience in places (such as hospitals and schools) that require continuous water supply.
A living fire constant pressure water supply equipment is designed, adopting a first water exchange assembly and a second water exchange assembly through which water can be replaced and cleaned without closing the entire water supply system.
It realizes that there is no need to close the entire water supply system during the water change process, ensures that users continue to obtain stable water supply, avoids inconvenience and losses caused by water outage, and extends the service life of the equipment.
Smart Images
Figure CN223034128U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of domestic fire protection, in particular to a domestic fire protection constant pressure water supply device. Background Art
[0002] The working principle of the domestic fire protection constant pressure water supply device is based on frequency conversion speed regulation technology and pressure sensing technology. When the water consumption increases, the water pressure in the water supply network drops. The pressure sensor detects this change and transmits the signal to the frequency conversion control system. The frequency conversion control system automatically adjusts the rotation speed and operating state of the water pump motor according to the set parameters and the detected signal, so that the water output of the water pump matches the water consumption, thereby maintaining a constant water supply pressure. When the water consumption decreases, the system automatically reduces the rotation speed and water output of the water pump to save energy and reduce waste.
[0003] The air pressure tank is filled with gas at a certain pressure. When the water pump unit works, water is pressurized and sent into the air pressure tank, and at the same time, the gas in the tank is compressed. When the water consumption increases and the water pressure in the water supply network drops, the water in the air pressure tank is released into the water supply network under the action of the gas pressure to supplement the water supply pressure. In order to maintain the water quality and equipment performance in the gas storage tank, it is necessary to drain water regularly. This helps to reduce water accumulation and prevent water quality deterioration and equipment corrosion.
[0004] In the existing technical solutions, when it is necessary to replace the water inside the air pressure tank, first of all, it is necessary to shut down the entire water supply system, including all pipelines and valves connected to the air pressure tank, to prevent the interference of water flow during the replacement process; open the drain valve of the air pressure tank to completely drain the water in the tank. However, this kind of water replacement operation requires shutting down the entire water supply system, and the water replacement operation itself takes a certain amount of time, during which the system will not be able to provide normal water supply services. For places that require continuous water supply, such as hospitals, schools, etc., this may bring certain inconveniences. Summary of the Utility Model
[0005] The purpose of the utility model is to provide a domestic fire protection constant pressure water supply device. During the water replacement process, it is not necessary to shut down the entire water supply system, which means that users can continuously obtain stable water supply and will not be interrupted due to the water replacement operation; for residential and commercial users, continuous water supply service is crucial, avoiding the inconveniences and losses caused by water cut-off, so as to solve the problems put forward in the above background art.
[0006] To achieve the above purpose, the utility model provides the following technical solution: a domestic fire protection constant pressure water supply device, including a tank body, a membrane frame is fixedly installed at the middle position inside the tank body, a membrane is fixedly installed inside the membrane frame, and a first water replacement component and a second water replacement component are respectively arranged inside the tank body below the membrane.
[0007] The first water-changing component includes a first water-changing chamber opened at the rear side of the bottom end inside the tank body. A first drain valve pipe fixedly installed at the bottom end of the tank body is communicated below the first water-changing chamber, and a first water supply valve pipe fixedly installed on the rear side wall of the tank body is communicated behind the first water-changing chamber;
[0008] The second water-changing component includes a second water-changing chamber opened at the front side of the bottom end inside the tank body. A second drain valve pipe fixedly installed at the bottom end of the tank body is communicated below the second water-changing chamber, and a second water supply valve pipe fixedly installed on the front side wall of the tank body is communicated in front of the second water-changing chamber.
[0009] Preferably, a pressure gauge is fixedly installed on the side wall of the top end of the tank body, and a pressurized air pipe is fixedly communicated with the top end of the tank body.
[0010] Preferably, a water supply valve pipe is communicated with the side wall of the tank body, and a pipe network valve pipe is communicated with the bottom end of the tank body.
[0011] Preferably, a cleaning and isolation component is jointly arranged inside and outside the tank body. The cleaning and isolation component includes a servo motor fixedly installed at the bottom of the tank body. The output end of the servo motor is fixedly connected with a driving shaft. Symmetrically distributed partition clamping plates are fixedly arranged on the side wall of the driving shaft. Limiting guide grooves are opened on the inner walls of the partition clamping plates. Limiting guide rods are slidably installed inside the limiting guide grooves. A fitting scraping blade is fixedly installed at one end of the limiting guide rod away from the partition clamping plate.
[0012] Preferably, a sealing and pressure regulating component is jointly arranged inside and outside the cleaning and isolation component. The sealing and pressure regulating component includes a pressure regulating pipe sleeve rotatably installed on the outer wall of the bottom end of the driving shaft. An air supply valve pipe is communicated with the outer wall of the pressure regulating pipe sleeve. A communicating cavity is opened inside the driving shaft, and a communicating hole is opened on the outer wall of the driving shaft corresponding to the pressure regulating pipe sleeve.
[0013] Preferably, a pressure regulating bladder is installed inside the partition clamping plate. An air supply hole is opened at the connection between the pressure regulating bladder and the driving shaft. The pressure regulating bladder is communicated with the communicating cavity through the air supply hole. A plurality of expansion grooves are opened on the front and rear side walls of the partition clamping plate.
[0014] Compared with the prior art, the beneficial effects of the utility model are:
[0015] 1. During the water change process of the present utility model, it is not necessary to shut down the entire water supply system, which means that users can continuously obtain stable water supply without interruption due to water change operations. For residential and commercial users, continuous water supply service is crucial, avoiding the inconvenience and losses caused by water cut-off. And when water quality problems are found or regular water change is required, operations can be carried out quickly, reducing the delays caused by waiting for the water cut-off window. Regularly changing the water quality can keep the inside of the pressure tank clean, reducing the accumulation of scale and impurities, thereby extending the service life of the equipment.
[0016] 2. Through scraping and cleaning, the present utility model can effectively remove the dirt, scale and deposits attached to the inner wall of the pressure tank. If these impurities accumulate for a long time, they may affect the water quality and even cause corrosion to the water supply system, affecting the water use safety of users. The clean inner wall of the pressure tank helps to keep the water quality clean and fresh, reducing the breeding environment of bacteria and other microorganisms, thereby improving the sanitary standard of the water supply. Dirt and deposits are one of the main factors causing corrosion of the inner wall of the pressure tank. Regular scraping and cleaning can remove these harmful substances and prevent their erosion of the tank body material, thereby extending the service life of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] In order to more clearly illustrate the specific embodiments of the present utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the following drawings are some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.
[0018] Figure 1 is the overall structural view of the present utility model;
[0019] Figure 2 is the schematic diagram of the internal structure of the tank body of the present utility model;
[0020] Figure 3 is the schematic diagram of the cleaning and isolation component structure of the present utility model;
[0021] Figure 4 is the schematic diagram of the sealing and pressure regulating component structure of the present utility model.
[0022] Description of the reference numerals:
[0023] 1. Tank body; 2. Pressure gauge; 3. Pressurized air pipe; 4. Cleaning and isolation assembly; 401. Servo motor; 402. Drive shaft; 403. Partition splint; 404. Limit guide groove; 405. Limit guide rod; 406. Fitting scraping blade; 5. Water supply valve pipe; 6. Pipe network valve pipe; 7. First water changing assembly; 701. First water changing chamber; 702. First water supply valve pipe; 703. First drain valve pipe; 8. Second water changing assembly; 801. Second water changing chamber; 802. Second water supply valve pipe; 803. Second drain valve pipe; 9. Sealing and pressure regulating assembly; 901. Pressure regulating pipe sleeve; 902. Air supply valve pipe; 903. Connecting chamber; 904. Air supply hole; 905. Pressure regulating bladder; 906. Connecting hole; 907. Expansion groove; 10. Diaphragm; 11. Diaphragm holder. Detailed implementation manners
[0024] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.
[0025] The present invention provides a technical solution:
[0026] Please refer to Figures 1 to 3 , a constant pressure water supply device for domestic and fire fighting, including a tank body 1. A diaphragm holder 11 is fixedly installed at the middle position inside the tank body 1, and a diaphragm 10 is fixedly installed inside the diaphragm holder 11. Below the diaphragm 10, a first water changing assembly 7 and a second water changing assembly 8 are respectively arranged inside the tank body 1. A cleaning and isolation assembly 4 is jointly arranged inside and outside the tank body 1, and a sealing and pressure regulating assembly 9 is jointly arranged inside and outside the cleaning and isolation assembly 4. The first water changing assembly 7 includes a first water changing chamber 701 opened at the rear side of the bottom end inside the tank body 1. The first drain valve pipe 703 fixedly installed at the bottom end of the tank body 1 is communicated below the first water changing chamber 701, and the first water supply valve pipe 702 fixedly installed on the rear side wall of the tank body 1 is communicated behind the first water changing chamber 701. The second water changing assembly 8 includes a second water changing chamber 801 opened at the front side of the bottom end inside the tank body 1. The second drain valve pipe 803 fixedly installed at the bottom end of the tank body 1 is communicated below the second water changing chamber 801, and the second water supply valve pipe 802 fixedly installed on the front side wall of the tank body 1 is communicated in front of the second water changing chamber 801.
[0027] A pressure gauge 2 is fixedly installed on the side wall of the top end of the tank body 1, and a pressurized air pipe 3 is fixedly communicated with the top end of the tank body 1. A water supply valve pipe 5 is communicated with the side wall of the tank body 1, and a pipe network valve pipe 6 is communicated with the bottom end of the tank body 1.
[0028] By adopting the above technical solution, during use, a certain pressure of gas can be filled into the tank body 1 through the pressurized air pipe 3, and the pressure inside the tank body 1 can be detected through the pressure gauge 2. After a certain amount of gas is filled into the space above the diaphragm 10, the water in the first water exchange chamber 701 and the second water exchange chamber 801 at the bottom can be pressurized through the diaphragm 10. When the water consumption increases and causes the network pressure to drop, the water in the tank body 1 is released into the water supply network under the action of the gas pressure to supplement the water supply pressure. The provided water supply valve pipe 5 is interconnected with the water pump unit, so that a certain amount of water can be injected into the tank body 1. The provided water network valve pipe 6 is connected to the water use network to supply water to users. When the water supply valve pipe 5 is opened, water can be supplied into the first water exchange chamber 701 and the second water exchange chamber 801. Through the connection of the first water exchange chamber 701, the second water exchange chamber 801 and the water network valve pipe 6, the water output of the water pump can be matched with the water consumption, so as to keep the water supply pressure constant. When it is necessary to replace the water inside the tank body 1, start the cleaning isolation component 4 and the sealing pressure regulating component 9, and replace and clean the water in the first water exchange chamber 701 and the second water exchange chamber 801 in sequence. Close the water supply valve pipe 5 and the water network valve pipe 6 on the side of the first water exchange chamber 701, open the first drain valve pipe 703, and the water in the first water exchange chamber 701 can be drained through the first drain valve pipe 703. After the discharge is completed, close the first drain valve pipe 703, open the first water supply valve pipe 702, and add new clean water into the first water exchange chamber 701 through the first water supply valve pipe 702. After the water in the first water exchange chamber 701 is replaced, similarly, replace and clean the water in the second water exchange chamber 801. Close the water supply valve pipe 5 and the water network valve pipe 6 on the side of the second water exchange chamber 801, open the second drain valve pipe 803, and the water in the second water exchange chamber 801 can be drained through the second drain valve pipe 803. After the discharge is completed, close the second drain valve pipe 803, open the second water supply valve pipe 802, and add new clean water into the second water exchange chamber 801 through the second water supply valve pipe 802, so as to complete the replacement of the water inside the tank body 1 in sequence. This method does not require the entire water supply system to be shut down during the water replacement process, which means that users can continuously obtain stable water supply and will not be interrupted due to the water replacement operation. For residential and commercial users, continuous water supply service is crucial, avoiding the inconvenience and losses caused by water stoppage. And when water quality problems are found or regular water replacement is required, operations can be carried out quickly, reducing the delay caused by waiting for the water stoppage window. Regularly replacing the water quality can keep the inside of the pressure tank clean, reduce the accumulation of scale and impurities, and thus extend the service life of the equipment. Regular water replacement helps to keep the water quality fresh and clean, reduce the growth of bacteria and other microorganisms, and improve the safety of water supply. Conducting water replacement operations without shutting down the entire water supply system can reduce the risk of water quality pollution caused by improper operations.
[0029] Specifically, such as Figures 2 - 4As shown, the cleaning and isolation assembly 4 includes a servo motor 401 fixedly installed at the bottom of the tank body 1, and the output end of the servo motor 401 is fixedly connected to a drive shaft 402. Symmetrically distributed partition clamping plates 403 are fixedly arranged on the side wall of the drive shaft 402. A limiting guide groove 404 is opened on the inner wall of the partition clamping plate 403, and a limiting guide rod 405 is slidably installed inside the limiting guide groove 404. One end of the limiting guide rod 405 away from the partition clamping plate 403 is fixedly installed with a fitting scraping blade 406. The sealing and pressure regulating assembly 9 includes a pressure regulating sleeve 901 rotatably installed on the outer wall of the bottom end of the drive shaft 402, and an air supply valve pipe 902 is communicated with the outer wall of the pressure regulating sleeve 901. A communication cavity 903 is opened inside the drive shaft 402, and a communication hole 906 is opened on the outer wall of the drive shaft 402 corresponding to the pressure regulating sleeve 901. A pressure regulating bladder 905 is installed inside the partition clamping plate 403. An air supply hole 904 is opened at the connection between the pressure regulating bladder 905 and the drive shaft 402. The pressure regulating bladder 905 is communicated with the communication cavity 903 through the air supply hole 904, and a plurality of expansion grooves 907 are opened on the front and rear side walls of the partition clamping plate 403.
[0030] By adopting the above technical solution, during use, the air supply valve pipe 902 is connected to an external air pump. In this way, the air pump can pump gas into the pressure regulating bladder 905, and the change in the internal air pressure of the pressure regulating bladder 905 is used to make up for the change in the air pressure in the tank body 1 during water replacement, so as to ensure the stability of the internal water supply of the device during water replacement. During use, the air pump is connected to the air supply valve pipe 902, and the air pump can pump gas into the pressure regulating pipe sleeve 901 through the air supply valve pipe 902. The pressure regulating pipe sleeve 901 is connected to the inside of the communication cavity 903 through the communication hole 906, so that gas can be pumped into the communication cavity 903. The gas in the communication cavity 903 can be introduced into the pressure regulating bladder 905 through the air supply hole 904. The pressure regulating bladder 905 can push the fitting scraping blade 406 to move through the expansion of the internal gas. The fitting scraping blade 406 can be attached to the inner wall of the tank body 1 through the sliding of the limit guide rod 405 in the limit guide groove 404. At this time, the servo motor 401 is started. The operation of the servo motor 401 can drive the partition clamping plate 403 to rotate through the drive shaft 402, and then drive the fitting scraping blade 406 to rotate. In this way, the inner wall of the tank body 1 can be scraped by the fitting scraping blade 406. Through scraping and cleaning, the dirt, scale and sediment attached to the inner wall of the pressure tank can be effectively removed. If these impurities accumulate for a long time, they may affect the water quality and even cause corrosion to the water supply system, affecting the water use safety of users. The clean inner wall of the pressure tank helps to keep the water quality clean and fresh, reduce the breeding environment of bacteria and other microorganisms, and thus improve the sanitary standard of the water supply. Dirt and sediment are one of the main factors causing corrosion of the inner wall of the pressure tank. Regular scraping and cleaning can remove these harmful substances and prevent their erosion of the material of the tank body 1, thereby extending the service life of the equipment. The clean inner wall of the pressure tank helps to keep the water flow unobstructed and reduce the problem of poor water flow caused by dirt blockage. During water replacement, the partition clamping plate 403 needs to be rotated to a position corresponding to the membrane frame 11 to ensure the stability and tightness of the fit at the corresponding position between the partition clamping plate 403 and the membrane frame 11, and ensure the partitioning effect of the partition clamping plate 403. The air pump pumps gas into the pressure regulating bladder 905, and the gas filled inside the pressure regulating bladder 905 can overflow from the expansion groove 907 to adapt to the change demand of the air pressure in the tank body 1. When the internal pressure needs to be reduced, the connection of the air pump can be disconnected, and the air supply valve pipe 902 is opened to release the gas inside the pressure regulating bladder 905 through the air supply valve pipe 902. During internal air pressure regulation, the change of the air pressure in the tank body 1 can be observed according to the pressure gauge 2.
[0031] Working principle: The pressurized air pipe 3 can be used to fill a certain pressure of gas into the tank body 1. The pressure gauge 2 can detect the pressure inside the tank body 1. After a certain amount of gas is filled into the space above the diaphragm 10, the water in the first water exchange chamber 701 and the second water exchange chamber 801 at the bottom can be pressurized through the diaphragm 10. When the water consumption increases and the network pressure drops, the water in the tank body 1 is released into the water supply network under the action of the gas pressure to supplement the water supply pressure. The provided water supply valve pipe 5 is interconnected with the water pump unit, so that a certain amount of water can be injected into the tank body 1. The provided network valve pipe 6 is connected to the water use network to supply water to users. By opening the water supply valve pipes 5 on the outer sides of the first water exchange chamber 701 and the second water exchange chamber 801 respectively, water can be supplied into the first water exchange chamber 701 and the second water exchange chamber 801. Through the connection of the first water exchange chamber 701, the second water exchange chamber 801 and the network valve pipe 6, the water output of the water pump can be matched with the water consumption, so as to keep the water supply pressure constant;When performing water change and cleaning, connect the air supply valve pipe 902 with an external air pump. In this way, the air pump can pump gas into the pressure regulating bladder 905, and make up for the air pressure change in the tank body 1 during water change through the change of the internal air pressure of the pressure regulating bladder 905, so as to ensure the stability of the internal water supply of the device during water change. When in use, the air pump is connected to the air supply valve pipe 902, and the air pump can pump gas into the pressure regulating pipe sleeve 901 through the air supply valve pipe 902. The pressure regulating pipe sleeve 901 is internally connected to the communication cavity 903 through the communication hole 906, so that gas can be pumped into the communication cavity 903. The gas in the communication cavity 903 can be introduced into the pressure regulating bladder 905 through the air supply hole 904. The pressure regulating bladder 905 can push the fitting scraping blade 406 to move through the expansion of the internal gas. The fitting scraping blade 406 can be attached to the inner wall of the tank body 1 through the sliding of the limit guide rod 405 in the limit guide groove 404. At this time, start the servo motor 401. The operation of the servo motor 401 can drive the partition clamping plate 403 to rotate through the drive shaft 402, and then drive the fitting scraping blade 406 to rotate. In this way, the inner wall of the tank body 1 can be scraped by the fitting scraping blade 406. After the scraping and cleaning treatment, the partition clamping plate 403 needs to be rotated to the position corresponding to the membrane frame 11 to ensure the stability and tightness of the fitting at the corresponding position between the partition clamping plate 403 and the membrane frame 11. The air pump pumps gas into the pressure regulating bladder 905. The gas filled in the pressure regulating bladder 905 can overflow from the expansion groove 907 to adapt to the change demand of the air pressure in the tank body 1. When the internal pressure needs to be reduced, disconnect the connection of the air pump, open the air supply valve pipe 902, and release the gas inside the pressure regulating bladder 905 through the air supply valve pipe 902. When adjusting the internal air pressure, the change of the air pressure in the tank body 1 can be observed according to the pressure gauge 2. When performing water change, replace and clean the water in the first water change cavity 701 and the second water change cavity 801 in sequence. Close the water supply valve pipe 5 and the pipe network valve pipe 6 on the side of the first water change cavity 701, open the first drain valve pipe 703, and the water in the first water change cavity 701 can be drained through the first drain valve pipe 703. After the drainage is completed, close the first drain valve pipe 703, open the first water supply valve pipe 702, and add new clean water to the first water change cavity 701 through the first water supply valve pipe 702. After the water in the first water change cavity 701 is replaced, similarly, replace and clean the water in the second water change cavity 801. Close the water supply valve pipe 5 and the pipe network valve pipe 6 on the side of the second water change cavity 801, open the second drain valve pipe 803, and the water in the second water change cavity 801 can be drained through the second drain valve pipe 803. After the drainage is completed, close the second drain valve pipe 803, open the second water supply valve pipe 802, and add new clean water to the second water change cavity 801 through the second water supply valve pipe 802, so as to complete the replacement of the water in the tank body 1 in sequence. When performing water change, adapt to the change of the air pressure in the tank body 1 according to the sealed pressure regulating assembly 9 at any time.;
[0032] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.
Claims
1. A constant pressure water supply device for domestic fire fighting, comprising a tank body (1), characterized in that: A membrane frame (11) is fixedly installed in the middle position inside the tank body (1), a membrane sheet (10) is fixedly installed inside the membrane frame (11), and a first water exchange component (7) and a second water exchange component (8) are respectively provided inside the tank body (1) below the membrane sheet (10); The first water exchange component (7) comprises a first water exchange chamber (701) disposed at the rear side of the bottom end of the tank body (1); the first water exchange chamber (701) is connected below with a first water discharge valve pipe (703) fixedly mounted at the bottom end of the tank body (1); the first water exchange chamber (701) is connected behind with a first water supply valve pipe (702) fixedly mounted on the rear side wall of the tank body (1); The second water exchange assembly (8) comprises a second water exchange chamber (801) opened at the front side of the bottom end of the tank body (1); the lower part of the second water exchange chamber (801) is connected to a second water discharge valve pipe (803) fixedly mounted at the bottom end of the tank body (1); the front part of the second water exchange chamber (801) is connected to a second water supply valve pipe (802) fixedly mounted on the front side wall of the tank body (1).
2. A constant pressure water supply equipment for domestic fire fighting according to claim 1, characterized in that: A pressure gauge (2) is fixedly mounted on the top side wall of the tank body (1), and a pressurized air pipe (3) is fixedly connected to the top of the tank body (1).
3. A constant pressure water supply equipment for domestic fire fighting according to claim 1, characterized in that: The side wall of the tank body (1) is connected to a water supply valve pipe (5), and the bottom end of the tank body (1) is connected to a pipe network valve pipe (6).
4. A constant pressure water supply equipment for domestic fire fighting according to claim 1, characterized in that: The inside and outside of the tank body (1) are jointly provided with a cleaning isolation assembly (4), the cleaning isolation assembly (4) comprising a servo motor (401) fixedly mounted on the bottom of the tank body (1), the output end of the servo motor (401) being fixedly connected to a drive shaft (402), a symmetrically distributed partitioning clamping plate (403) being fixedly mounted on the side wall of the drive shaft (402), the partitioning clamping plate (403) being used to separate the first water exchange chamber (701) and the second water exchange chamber (801), a limiting guide groove (404) being provided on the inner wall of the partitioning clamping plate (403), a limiting guide rod (405) being slidably mounted inside the limiting guide groove (404), and a fitting scraper (406) being fixedly mounted on one end of the limiting guide rod (405) away from the partitioning clamping plate (403).
5. A constant pressure water supply equipment for domestic fire fighting according to claim 4, characterized in that: The inside and outside of the cleaning isolation component (4) are jointly provided with a sealing pressure regulating component (9), and the sealing pressure regulating component (9) includes a pressure regulating sleeve (901) rotatably mounted on the outer wall of the bottom end of the driving shaft (402), and the outer wall of the pressure regulating sleeve (901) is connected to an air supply valve pipe (902), and a connecting cavity (903) is provided inside the driving shaft (402), and a connecting hole (906) is provided on the outer wall of the driving shaft (402) at a position corresponding to the pressure regulating sleeve (901).
6. A constant pressure water supply equipment for domestic fire fighting according to claim 5, characterized in that: A pressure regulating sac (905) is installed inside the partition splint (403), and an air supply hole (904) is provided at the connection between the pressure regulating sac (905) and the driving shaft (402). The pressure regulating sac (905) is connected to the connecting cavity (903) through the air supply hole (904), and a plurality of expansion grooves (907) are provided on the front and rear side walls of the partition splint (403).