A full-mechanical automatic tracking self-balancing variable current stabilizing device and its using method

Abstract

The application relates to a full-mechanical automatic tracking self-balancing variable current voltage stabilizing device and a use method thereof, which comprises a main pipe and two gear connecting rod combined mechanisms arranged on the two sides of the main pipe respectively; the gear connecting rod combined mechanism comprises a bellows, a pressing plate pressed on one end of the bellows far from a water inlet pipe, and a pressing rod pressed on the hose; one end of the bellows is sealingly connected with the pipe wall of the water inlet pipe, the other end is sealingly fixedly connected with the pressing plate, a supporting rod extending away from the bellows is fixed on the pressing plate, a spring is connected with one end of the supporting rod far from the pressing plate, and the other end of the spring far from the supporting rod is fixedly arranged; the gear connecting rod combined mechanism further comprises a driving gear and a driven gear which are mutually meshed. The application changes the flow area of the hose through the gear transmission mechanism of each connecting rod and the expansion and contraction of the bellows when the water pressure changes, so that the flow is stored and the pressure is increased when the pressure is low, the municipal end water pressure is prevented from being lower than the minimum allowable value due to excessive secondary water supply and water taking, no external power is needed, and the automatic tracking and self-balancing functions are achieved.

Description

Technical Field

[0001] This invention relates to the field of water pressure stabilization technology, and in particular to pressure stabilization through a fully mechanical structure, specifically a fully mechanical automatic tracking self-balancing converter and pressure stabilization device and its usage method. Background Technology

[0002] Secondary water supply refers to a form of water supply that temporarily stores and pressurizes municipal public water supply before supplying it to users through pipelines. This form of water supply solves the problem of insufficient pressure in municipal water supply pipelines and ensures the water needs of high-rise users.

[0003] Secondary water supply is crucial for high-rise residents, ensuring their water supply. The "Standard for Design of Building Water Supply and Drainage GB50015-2019" clearly stipulates that the minimum water pressure in the municipal water supply network must not be lower than 0.02 MPa in secondary water supply systems. To meet this requirement, the primary existing technology ensures the minimum water pressure in the municipal water supply network is not lower than 0.02 MPa through electronic control. This involves using pressure sensors to monitor water pressure and then controlling it with electric valves. The opening of the electric valves is adjusted according to the monitored water pressure, thereby adjusting the flow cross-sectional area and ultimately regulating the water pressure. However, this pressure regulation structure relies on electronic control, which often suffers from a high failure rate and long response time, leading to excessive errors and failing to meet the requirement of a minimum water pressure of 0.02 MPa in the municipal water supply network. Summary of the Invention

[0004] This invention addresses the shortcomings of existing technologies by providing a fully mechanical automatic tracking self-balancing converter and pressure stabilizing device and its usage method. It utilizes the changed water pressure from the municipal system as the driving force and employs a fully mechanical mechanism to effectively prevent the municipal pipeline pressure from falling below the allowable value due to secondary water supply intake. It has the advantages of good stability, high reliability, and low failure rate.

[0005] The present invention is achieved through the following technical solution: a fully mechanical automatic tracking self-balancing converter voltage regulator is provided, including a main frame, a main pipe, and two gear connecting rod combination mechanisms respectively arranged on both sides of the main pipe;

[0006] The main pipe includes an inlet pipe, a transition pipe, a flexible hose, and an outlet pipe connected sequentially along the axial direction;

[0007] The gear linkage assembly includes a bellows, a pressure plate pressed against the end of the bellows away from the water inlet pipe, and a pressure rod pressed against the hose. The pressure rods of the two gear linkage assemblies are arranged opposite to each other.

[0008] One end of the corrugated pipe passes through the wall of the inlet pipe and is sealed to the wall of the inlet pipe. The end of the corrugated pipe away from the inlet pipe is sealed and fixed to the pressure plate. A support rod extending away from the corrugated pipe is fixed on the pressure plate. A spring is connected to the end of the support rod away from the pressure plate. The end of the spring away from the support rod is fixedly installed.

[0009] The gear and linkage assembly also includes a driving gear and a driven gear that mesh with each other. Both the driving gear and the driven gear are rotatably mounted on the main frame, which is fixedly mounted. A first fixed arm extending radially is fixedly mounted on the driving gear. A first connecting rod is hinged to the end of the first fixed arm away from the driving gear, and the end of the first connecting rod away from the first fixed arm is hinged to a support rod. A second fixed arm extending radially is fixedly mounted on the driven gear. A second connecting rod is hinged to the end of the second fixed arm away from the driven gear, and a driven rod is hinged to the end of the second connecting rod away from the second fixed arm. The driven rod is fixedly connected to a pressure rod.

[0010] In operation, the inlet pipe is connected to the municipal water supply network. Utilizing the expandable nature of the corrugated pipe, the water pressure inside the inlet pipe applies force to the support rod via a pressure plate, in the opposite direction to the force exerted by the spring on the support rod. When the water pressure in the municipal network is lower than the minimum allowable value, the thrust of the water pressure in the corrugated pipe on the support rod decreases, becoming less than the spring force. The spring extends and pushes the support rod to move, causing the drive gear to rotate counterclockwise and drive the driven gear to rotate clockwise. This, in turn, causes the pressure rod to compress the hose, flattening it and reducing its flow cross-section. The water in the inlet pipe gradually accumulates and pressurizes, ensuring that the pressure at the end of the municipal network remains at the minimum allowable value. The above applies; if the water pressure in the municipal pipe network further decreases, the aforementioned transmission continues until the flow cross-section of the hose is completely flattened at the limit state, and the water flow is completely interrupted. At this time, the water flow in the municipal pipe network stops, and the water pressure at the end of the pipe network is entirely determined by the pressure of the municipal pipe network itself; when the water pressure in the municipal pipe network gradually rises to above the specified minimum allowable pressure, the corrugated pipe extends under the action of water pressure, pushes the support rod to move and compresses the spring. Through the meshing of the driving gear and the driven gear, the pressure rod gradually leaves the hose, the hose gradually returns to its original shape, and the flow cross-sectional area of ​​the hose gradually increases until the maximum flow capacity is reached.

[0011] As an optimization, the hose is a flat tube, with the two pressure rods parallel to two planes of the flat tube wall, and the planes containing the two pressure rods perpendicular to the plane of the flat tube wall. This optimized design increases the contact area between the pressure rods and the hose, improves the speed of controlling the flow cross-section of the hose, shortens the response time, and makes pressure adjustment more efficient.

[0012] As an optimization, both the driving gear and the driven gear are sector gears. This optimized design avoids material waste and reduces manufacturing costs while ensuring reliable meshing and transmission.

[0013] As an optimization, a first clamping sleeve is fixedly fitted onto the support rod, and the first clamping sleeve is hinged to the first connecting rod; the end of the spring facing the pressure plate pushes against the first clamping sleeve, and the end of the support rod away from the pressure plate extends into the inner hole of the spring. In this optimized solution, the first connecting rod is hinged to the support rod through the first clamping sleeve. By setting the clamping sleeve, the hinge connection between the support rod and the first connecting rod is facilitated. At the same time, the first clamping sleeve is used as the end limit of the spring, eliminating the need for additional special limiting platforms or other structures, thereby simplifying the structure and reducing the manufacturing difficulty of the support rod.

[0014] As an optimization, an end sleeve is fixedly connected to the end of the spring furthest from the support rod, and the end sleeve is fixedly connected to the main frame. This optimization scheme uses the end sleeve as a limit for the end of the spring furthest from the support rod, which facilitates the limitation of the spring.

[0015] As an optimization, a second clamping sleeve is fixedly fitted onto the driven rod, and the second clamping sleeve is hinged to the second connecting rod. This optimized solution, by setting the second clamping sleeve, facilitates the hinge between the driven rod and the second connecting rod, eliminating the need to machine bosses or other structures on the driven rod, thus reducing manufacturing difficulty. Furthermore, it allows for easy movement of the position of the second clamping sleeve, thereby facilitating the adjustment of the relative position of the pressure rod and the hose.

[0016] This solution also provides a method for using the above-mentioned fully mechanical automatic tracking self-balancing converter voltage regulator, including the following aspects:

[0017] When the water pressure in the municipal water supply network is lower than the minimum allowable value, the force exerted by the corrugated pipe on the support rod decreases, the spring extends, and the support rod is pushed towards the inlet pipe, causing the drive gear to rotate. The drive gear then drives the driven gear to rotate, transmitting force through the second connecting rod and the second fixed arm, causing the driven rod to move towards the hose. This causes the pressure rod to squeeze the hose, and under the squeezing action of the pressure rods on both sides, the flow cross-section of the hose decreases, and the inlet pipe gradually accumulates and pressurizes, ensuring that the water pressure at the end of the municipal water supply network is always above the minimum allowable value. If the water pressure in the municipal water supply network further decreases, the aforementioned transmission relay... The process continues until the hose's flow section is completely compacted at the limit state, and the water flow is completely interrupted. At this point, the municipal water supply stops entering, and the water pressure at the end of the network is entirely determined by the municipal network's own pressure. When the water pressure in the municipal network gradually rises above the specified minimum allowable pressure, the corrugated pipe pushes the support rod upward, the spring is compressed, and as the support rod moves, it drives the drive gear to rotate, which in turn drives the driven gear to rotate through meshing. This causes the driven rod and pressure rod to move away from the hose, and the hose gradually returns to its original shape. The flow section area of ​​the hose gradually increases until it reaches its maximum.

[0018] The beneficial effects of this invention are as follows: By utilizing the expansion and contraction of the corrugated pipe on the flexible converter and the synergistic effect of the spring during water pressure fluctuations, the flow area of ​​the hose is changed through the linkage and gear transmission mechanism. When the pressure decreases, the flow is stored and pressurized, avoiding the municipal water pressure from falling below the minimum allowable value due to excessive water intake from the secondary water supply. It also does not produce large water flow losses when the pipeline pressure is high. The device of this invention does not require external power, has automatic tracking and self-balancing functions, and features reliable operation, high sensitivity, and low failure rate. It has high application value in secondary water supply and similar situations requiring pressure maintenance at the inlet. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the present invention;

[0020] Figure 2 The main view for the supervisor;

[0021] Figure 3 A 3D diagram of the supervisor;

[0022] Figure 4 This is the main view showing the connection between the pressure plate and the support rod.

[0023] Figure 5 A 3D view showing the connection between the pressure plate and the support rod;

[0024] Figure 6 This is a schematic diagram of the first clamping sleeve structure;

[0025] Figure 7 This is a schematic diagram of the drive gear structure;

[0026] Figure 8 This is a schematic diagram of the driven gear structure;

[0027] Figure 9 Main view of the connection between the driven rod and the compression rod;

[0028] Figure 10 This is a three-dimensional view showing the connection between the driven rod and the compression rod.

[0029] As shown in the figure:

[0030] 1. Inlet pipe, 2. Corrugated pipe, 3. Pressure plate, 4. Spring, 5. End sleeve, 6. First clamping sleeve, 7. First connecting rod, 8. First fixed arm, 9. Second fixed arm, 10. Transition pipe, 11. Second connecting rod, 12. Second clamping sleeve, 13. Driven rod, 14. Flexible hose, 15. Expander pipe, 16. Outlet pipe, 17. Pressure rod, 18. Support rod, 19. Drive gear, 20. Driven gear, 21. Threaded hole, 22. Hinge lug, 23. Hinge hole. Detailed Implementation

[0031] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] In the description of this invention, it should be understood that the terms "axial", "radial", "front", "rear", "left", "right", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0033] like Figure 1 The device shown is a fully mechanical automatic tracking self-balancing converter voltage regulator, including a main frame, a main pipe, and two gear and linkage combination mechanisms respectively set on both sides of the main pipe. The main frame is a fixed frame structure, which can be provided with an installation foundation by using existing technology.

[0034] The main pipe forms a flow-changing and pressure-stabilizing body, which is a flexible tubular body with circular cross-sections at both ends and a flattened circular cross-section off-center in the middle. Specifically, the main pipe includes an inlet pipe 1, a transition pipe 10, a flexible hose 14, and an outlet pipe 16 connected sequentially along the axial direction. The inlet pipe 1, transition pipe 10, flexible hose 14, and outlet pipe 16 are coaxial. The main pipe is made of food-grade rubber. The end of the inlet pipe furthest from the transition pipe connects to the end of the municipal water supply network, and the outlet pipe connects to the inlet end of the flow stabilizing tank or the booster tank. The end of the main pipe connected to the end of the municipal water supply network has a circular cross-section. The inlet pipe has two radially opposite through holes for connecting to a corrugated pipe. The transition pipe is generally tapered, with its larger diameter end connected to the inlet pipe and its smaller diameter end connected to the flexible hose. The flexible hose is a flat pipe with both its upper and lower sidewalls being flat and parallel to each other. The outlet pipe includes an expanded pipe 15 and a straight pipe. The expanded pipe is tapered in shape, with its smaller diameter end connected to the flexible hose and its larger diameter end connected to the straight pipe. For ease of description, in this embodiment, the inlet pipe is located on the left side of the flexible hose, and the outlet pipe is located on the right side of the flexible hose. The two gear linkage mechanisms are symmetrically arranged about the horizontal plane of the central axis of the main pipe.

[0035] The gear linkage assembly includes a bellows 2, a pressure plate 3 pressed against the end of the bellows away from the inlet pipe, and a pressure rod 17 pressed against the hose 14. The pressure rods of the two gear linkage assemblies are arranged opposite to each other. The two pressure rods 17 are parallel to the two planes of the flat pipe wall, and the planes of the two pressure rods are perpendicular to the plane of the flat pipe wall. When the two pressure rods move close to each other, they squeeze the hose, thereby changing the flow cross-sectional area of ​​the hose.

[0036] The length of the corrugated pipe is freely expandable and contractible. When the water pressure inside the pipe increases, the length of the corrugated pipe lengthens; when the water pressure decreases, the length of the corrugated pipe shortens. One end of the corrugated pipe passes through the wall of the inlet pipe and is sealed to the wall of the inlet pipe. In this embodiment, the wall of the corrugated pipe is sealed to the through hole on the wall of the inlet pipe, ensuring that the corrugated pipe is connected to the inlet pipe. When the water pressure inside the inlet pipe changes, the corrugated pipe can respond accordingly. The end of the corrugated pipe away from the inlet pipe is sealed and fixedly connected to the pressure plate 3 to prevent water leakage. A support rod 18 extending away from the corrugated pipe is fixedly provided on the side of the pressure plate away from the pressure plate. A spring 4 is connected to the end of the support rod 18 away from the pressure plate, and the end of the spring away from the support rod is fixedly installed. Specifically, an end sleeve 5 is fixedly connected to the end of the spring away from the support rod, and the end sleeve 5 is fixedly connected to the main frame. The spring is a compression spring, and the spring stiffness is selected to ensure that the pressure of the municipal water supply is not lower than the allowable value due to the secondary water supply. When the pressure of the municipal water supply is lower than the allowable value due to the secondary water supply, the secondary booster pump set will automatically stop drawing water from the tap water network.

[0037] The gear and linkage assembly mechanism of this embodiment also includes a driving gear 19 and a driven gear 20 that mesh with each other, and both the driving gear 19 and the driven gear 20 are sector gears. The driving gear and the driven gear are rotatably mounted on the main frame, and the main frame is provided with hinge shafts that pass through the driving gear and the driven gear respectively. The driving gear and the driven gear can rotate about their respective hinge shaft axes, and the hinge shafts extend in the front-back direction.

[0038] A first fixed arm 8 extending radially is fixedly mounted on the drive gear. A first connecting rod 7 is hinged to the end of the first fixed arm 8 away from the drive gear. The end of the first connecting rod 7 away from the first fixed arm is hinged to a support rod. When the support rod is pushed by a bellows or a spring, the drive gear rotates through the force transmission of the first connecting rod and the first fixed arm. To facilitate the connection between the first connecting rod and the support rod, in this embodiment, the first connecting rod is hinged to the support rod through a first clamping sleeve. Specifically, a first clamping sleeve 6 is fixedly mounted on the support rod, and the first clamping sleeve 6 is hinged to the first connecting rod 7. The end of the spring 4 facing the pressure plate pushes against the first clamping sleeve, and the end of the support rod away from the pressure plate extends into the inner hole of the spring. The side wall of the first clamping sleeve is provided with a positioning screw that extends radially to the support rod. The side wall of the first clamping sleeve is provided with a threaded hole 21 that matches the positioning screw. The side wall of the support rod is provided with several positioning grooves arranged vertically and matching the positioning screw. After tightening the positioning screw, the relative fixation between the first clamping sleeve and the support rod is achieved. After loosening the positioning screw, the position of the first clamping sleeve on the support rod can be adjusted. The outer side wall of the first clamping sleeve is provided with a hinge ear 22. The hinge ear is provided with a hinge hole 23. The hinge ear and the first connecting rod are hinged by a hinge shaft that passes through the hinge hole. The hinge shaft extends in the front-back direction.

[0039] A second fixed arm 9 extending radially is fixed to the driven gear. A second connecting rod 11 is hinged to the end of the second fixed arm 9 away from the driven gear. A driven rod 13 is hinged to the end of the second connecting rod away from the second fixed arm. The driven rod 13 is perpendicularly fixed to the pressure rod. A guide sleeve that slides with the driven rod is fixed to the main frame. The guide sleeve is perpendicular to the upper and lower side walls of the hose and provides guidance for the up-and-down movement of the driven rod. A second clamping sleeve 12 is fitted and fixed on the driven rod 13 and is hinged to the second connecting rod 11. In this embodiment, the structure of the second clamping sleeve is the same as that of the first clamping sleeve. Positioning grooves distributed vertically on the driven rod and adapted to the set screws on the second clamping sleeve are provided.

[0040] As a preferred embodiment, the first connecting rod and the first fixed arm form an angle with the opening facing the side where the main tube is located, and the second connecting rod and the second fixed arm also form an angle with the opening facing the side where the main tube is located, so as to avoid dead points and ensure the reliability of the rotation of the driving gear and the driven gear.

[0041] The method of using the fully mechanical automatic tracking self-balancing converter voltage regulator in this embodiment includes the following aspects:

[0042] When the water pressure in the municipal pipe network is less than the minimum allowable value, the thrust of the left corrugated pipe on the support rod decreases, and the thrust of the spring on the support rod is greater than the thrust of the corrugated pipe on the support rod. The spring extends and pushes the support rod toward the inlet pipe, causing the drive gear to rotate. The drive gear drives the driven gear to rotate. Taking the upper drive gear as an example, when the support rod moves, it drives the drive gear to rotate counterclockwise through the first connecting rod and the first fixed arm. The drive gear drives the driven gear to rotate clockwise. Through the second connecting rod and the second fixed arm, the force is transmitted, causing the driven rod to move toward the hose, so that the pressure rod squeezes the hose. Under the squeezing action of the pressure rods on both sides, the flow cross-section of the hose decreases, and the water in the inlet pipe gradually accumulates and increases pressure, so that the water pressure at the end of the municipal pipe network is always above the minimum allowable value.

[0043] If the water pressure in the municipal pipe network decreases further, the aforementioned transmission continues until the flow section of the hose is completely compacted at the limit state, and the water flow is completely interrupted. At this time, the water flow in the municipal pipe network stops, and the water pressure at the end of the pipe network is entirely determined by the pressure of the municipal pipe network itself.

[0044] When the water pressure in the municipal pipe network gradually rises above the specified minimum allowable pressure, the support rod is pushed upward by the corrugated pipe, the spring is compressed, and when the support rod moves, it drives the drive gear to rotate, which in turn drives the driven gear to rotate. Taking the upper drive gear as an example, the support rod drives the drive gear to rotate clockwise, and then drives the driven gear to move counterclockwise through meshing, which drives the driven rod and pressure rod to move away from the hose. The hose gradually returns to its original shape, and the flow cross-sectional area of ​​the hose gradually increases until it reaches the maximum flow capacity.

[0045] This invention is based on the natural changes in water pressure and uses the changed municipal water pressure as a driving force to control the flow rate in the terminal pipe of the municipal water supply network. When the municipal water supply network pressure decreases, this device automatically reduces the flow cross-section of the municipal water supply network inlet pipe, thereby causing the municipal water pressure to rise or reducing the rate of decrease. If the municipal water supply network pressure continues to decrease, the flow cross-section of the municipal water supply network inlet pipe is further reduced to ensure that the municipal water supply network pressure is maintained above 0.02 MPa. When the municipal water supply network pressure falls below the required minimum pressure, the terminal pipe of the municipal water supply network is completely shut off. If the municipal water supply network pressure increases, this device automatically increases the flow cross-section of the municipal water supply network inlet pipe until it is fully open. This achieves the goal of maintaining the municipal water supply network pressure above 0.02 MPa through total dynamic tracking without external power.

[0046] Of course, the above description is not limited to the examples above. Technical features not described in this invention can be implemented by or using existing technology, and will not be repeated here. The above embodiments and drawings are only used to illustrate the technical solutions of this invention and are not intended to limit this invention. This invention has been described in detail with reference to preferred embodiments. Those skilled in the art should understand that any changes, modifications, additions or substitutions made by those skilled in the art within the scope of this invention do not depart from the spirit of this invention and should also fall within the scope of protection of the claims of this invention.

Claims

1. A fully mechanical automatic tracking self-balancing converter voltage regulator, characterized in that: It includes a main frame, a main tube, and two gear-linkage combination mechanisms respectively set on both sides of the main tube; The main pipe includes an inlet pipe (1), a transition pipe (10), a hose (14), and an outlet pipe (16) connected in sequence along the axial direction. The gear linkage assembly includes a bellows (2), a pressure plate (3) pressed against the end of the bellows away from the water inlet pipe, and a pressure rod pressed against the hose (14). The pressure rods of the two gear linkage assemblies are arranged opposite to each other. One end of the corrugated pipe passes through the wall of the inlet pipe and is sealed to the wall of the inlet pipe. The end of the corrugated pipe away from the inlet pipe is sealed and fixed to the pressure plate (3). A support rod extending away from the corrugated pipe is fixed on the pressure plate. A spring (4) is connected to the end of the support rod away from the pressure plate. The end of the spring away from the support rod is fixedly set. The gear and linkage assembly also includes a driving gear and a driven gear that mesh with each other. Both the driving gear and the driven gear are rotatably mounted on the main frame, which is fixedly mounted. A first fixed arm (8) extending radially is fixedly mounted on the driving gear. A first connecting rod (7) is hinged to the end of the first fixed arm (8) away from the driving gear. The end of the first connecting rod (7) away from the first fixed arm is hinged to the support rod. A second fixed arm (9) extending radially is fixedly mounted on the driven gear. A second connecting rod (11) is hinged to the end of the second fixed arm (9) away from the driven gear. A driven rod (13) is hinged to the end of the second connecting rod away from the second fixed arm. The driven rod (13) is fixedly connected to the pressure rod.

2. The fully mechanical automatic tracking self-balancing converter voltage regulator according to claim 1, characterized in that: The hose (14) is a flat tube, and the two pressure rods are parallel to the two planes of the flat tube wall, respectively. The planes where the two pressure rods are located are perpendicular to the plane of the flat tube wall.

3. The fully mechanical automatic tracking self-balancing converter voltage regulator according to claim 1, characterized in that: Both the driving gear and the driven gear are sector gears.

4. The fully mechanical automatic tracking self-balancing converter voltage regulator according to claim 1, characterized in that: A first clamping sleeve (6) is fixedly fitted on the support rod, and the first clamping sleeve (6) is hinged to the first connecting rod (7); the end of the spring (4) facing the pressure plate pushes against the first clamping sleeve, and the end of the support rod away from the pressure plate extends to the inner hole of the spring.

5. The fully mechanical automatic tracking self-balancing converter voltage regulator according to claim 4, characterized in that: An end sleeve (5) is fixedly connected to the end of the spring away from the support rod, and the end sleeve (5) is fixedly connected to the main frame.

6. The fully mechanical automatic tracking self-balancing converter voltage regulator according to claim 1, characterized in that: A second clamping sleeve (12) is fixedly fitted onto the driven rod (13), and the second clamping sleeve (12) is hinged to the second connecting rod (11).

7. A method of using the fully mechanical automatic tracking self-balancing converter voltage regulator as described in any one of claims 1 to 6, characterized in that, Including the following aspects: When the water pressure in the municipal pipe network is less than the minimum allowable value, the force of the corrugated pipe on the support rod decreases, the spring extends, and pushes the support rod toward the inlet pipe, driving the drive gear to rotate. The drive gear drives the driven gear to rotate, and the force is transmitted through the second connecting rod and the second fixed arm, causing the driven rod to move toward the hose, so that the pressure rod squeezes the hose. Under the squeezing action of the pressure rods on both sides, the flow cross-section of the hose decreases, and the water in the inlet pipe gradually accumulates and increases pressure, so that the water pressure at the end of the municipal pipe network is always above the minimum allowable value. If the water pressure in the municipal pipe network decreases further, the aforementioned transmission continues until the flow section of the hose is completely compacted at the limit state, and the water flow is completely interrupted. At this time, the water flow in the municipal pipe network stops, and the water pressure at the end of the pipe network is entirely determined by the pressure of the municipal pipe network itself. When the water pressure in the municipal pipe network gradually rises above the specified minimum allowable pressure, the corrugated pipe pushes the support rod upward, the spring is compressed, and when the support rod moves, it drives the drive gear to rotate, which in turn drives the driven gear to rotate through meshing, causing the driven rod and pressure rod to move away from the hose. The hose gradually returns to its original shape, and the flow cross-sectional area of ​​the hose gradually increases until it reaches its maximum.

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