Long-distance water pressure system buffer tank

Abstract

The utility model discloses a kind of long-distance pressure water delivery system buffer tank, it is related to water flow buffering field, including tank body, further include: water inlet pipe, it is set to tank body side, the water inlet pipe is used to inject liquid into tank body;Solenoid valve, it is installed to tank body top, and is used to control the liquid flow in tank body;A piston, it is slidably installed to tank body inside;The long-distance pressure water delivery system buffer tank, by setting buffer tank in long-distance water delivery pipeline, when pressure impact occurs in water delivery system, liquid in tank body pushes A piston to move down, A piston is driven B piston to slide down in buffer cylinder by B connecting rod, compresses the air in C reset piece and B space below it, this process is absorbed and consumed by mechanical buffering and air cushion effect together Impact energy of water flow, effectively reduce the damage of water hammer phenomenon to pipeline, to reduce the risk of pipeline rupture.

Description

Technical Field

[0001] This utility model relates to water flow buffering technology, specifically to a buffer tank for a long-distance pressurized water conveyance system. Background Technology

[0002] A buffer tank, also known as a pressure stabilizing tank, expansion tank, or pressure balancing tank, is a device used to stabilize system pressure, reduce pressure fluctuations, absorb water hammer impacts, and protect pipelines and equipment.

[0003] When existing long-distance pressurized water pipelines are used for water transportation, there is a certain pressure of water flowing in the pipeline. When the water in the pipeline suddenly changes due to a change in flow velocity, causing a sharp fluctuation in pressure, a pressure shock phenomenon will occur in the pipeline. When the pressure shock occurs, the pipeline is very likely to rupture. Utility Model Content

[0004] The purpose of this invention is to provide a buffer tank for a long-distance pressurized water conveyance system, in order to solve the problem that in the prior art, when the water in the pipeline experiences a sudden change in flow velocity, causing a sharp fluctuation in pressure, the pipeline will experience pressure shock, which can easily lead to pipeline rupture.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a buffer tank for a long-distance pressurized water conveyance system, comprising a tank body, and further comprising:

[0006] A water inlet pipe is located on one side of the tank body, and the water inlet pipe is used to inject liquid into the tank body;

[0007] A solenoid valve, which is installed at the top of the tank and is used to control the outflow of liquid from the tank;

[0008] Piston A is slidably mounted inside the tank.

[0009] A flow tube is fixedly installed on piston A, and the flow tube connects the top and bottom ends of piston A.

[0010] A water-blocking check valve is disposed on top of piston A and above the flow tube, the water-blocking check valve allowing liquid to flow unidirectionally from below the flow tube to above the flow tube;

[0011] Linkage B is fixedly installed at the bottom end of piston A;

[0012] The buffer cylinder is fixedly installed at the bottom of the inner cavity of the tank and located below piston A. The buffer cylinder has a hole for connecting rod B to pass through.

[0013] Piston B is fixedly installed at the bottom of connecting rod B and slidably connected to the inside of the buffer cylinder. Piston B divides the space inside the buffer cylinder into space A and space B. Space A is located above piston B and space B is located below piston B.

[0014] C, the reset component, is located inside the buffer cylinder and at the bottom of piston B;

[0015] The air intake pipe is located on the buffer cylinder and is used to connect space A with the outside.

[0016] Furthermore, the water-blocking check valve includes:

[0017] The limiting shell is fixedly installed on the top of piston A;

[0018] A sealing plate is disposed inside the limiting shell and located at the top of the flow tube;

[0019] A reset component is disposed inside the limiting shell and located on the top of the A sealing plate. The A reset component abuts against and connects the A sealing plate and the limiting shell.

[0020] Furthermore, a space C is provided inside the piston A, and the space C is connected to the space above the piston A in the tank. A movable plate is slidably installed inside the space C, and the movable plate is slidably connected to the outside of the flow tube. A connecting rod A is fixedly installed at the bottom of the movable plate. A hole for the connecting rod A to pass through is opened at the bottom of the piston A. A reset component B is sleeved on the outside of the connecting rod A, and the two ends of the reset component B abut against the movable plate and the bottom of the space C, respectively.

[0021] Furthermore, two limiting rings are symmetrically fixedly installed on the inner wall of the buffer cylinder, and the two limiting rings are used to limit the range of motion of piston B inside the buffer cylinder.

[0022] Furthermore, a one-way valve B is provided at the bottom of the piston B, which allows air to flow from space A into space B in one direction.

[0023] Furthermore, the connection between the water inlet pipe and the tank is located below piston A, and the solenoid valve is located above piston A.

[0024] Furthermore, the connection point between the air intake pipe and space A is located above the limiting ring.

[0025] Furthermore, a detachable one-way valve A is installed at one end of the air inlet pipe located on the outside of the tank, which allows external gas to flow into space A in one direction.

[0026] Compared with the prior art, the buffer tank of the long-distance pressurized water conveyance system provided by this utility model is designed to absorb and consume the impact energy of the water flow through mechanical buffering and air cushion effect. When the water conveyance system experiences pressure shock, the liquid in the tank pushes piston A downward. Piston A drives piston B to slide downward in the buffer cylinder through connecting rod B, compressing the reset component C below and the air in space B. This process effectively reduces the damage of water hammer to the pipeline and thus reduces the risk of pipeline rupture. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0028] Figure 1 A schematic diagram of the overall structure provided for an embodiment of this utility model;

[0029] Figure 2 This is a first schematic cross-sectional view of the overall structure provided for an embodiment of the present utility model;

[0030] Figure 3 This is a second schematic cross-sectional view of the overall structure provided for an embodiment of the present utility model;

[0031] Figure 4 This is a third schematic cross-sectional view of the overall structure provided for an embodiment of the present utility model;

[0032] Figure 5 This is a partial cross-sectional first schematic diagram provided for an embodiment of the present utility model;

[0033] Figure 6 This is a second schematic diagram showing a partial cross-sectional view of an embodiment of the present invention.

[0034] Explanation of reference numerals in the attached figures:

[0035] 1. Tank body; 2. Solenoid valve; 3. Water inlet pipe; 4. Air inlet pipe; 5. Check valve A; 61. Piston A; 62. Limiting shell; 63. Reset component A; 64. Sealing plate A; 65. Flow pipe; 66. Movable plate; 67. Reset component B; 68. Connecting rod A; 71. Buffer cylinder; 72. Limiting ring; 73. Piston B; 74. Reset component C; 75. Check valve B; 8. Connecting rod B. Detailed Implementation

[0036] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0037] Example 1:

[0038] Please see Figures 1 to 6A buffer tank for a long-distance pressurized water conveyance system includes a tank body 1, and further includes: an inlet pipe 3, which is disposed on one side of the tank body 1 and is used to inject liquid into the tank body 1; a solenoid valve 2, which is installed at the top of the tank body 1 and is used to control the outflow of liquid from the tank body 1; an A piston 61, which is slidably installed inside the tank body 1; a flow pipe 65, which is fixedly installed on the A piston 61 and connects the top and bottom of the A piston 61; a water-blocking one-way valve, which is disposed at the top of the A piston 61 and above the flow pipe 65, and allows liquid to flow unidirectionally from below the flow pipe 65 to above the flow pipe 65; and a B connecting rod 8. It is fixedly installed at the bottom end of piston A 61; buffer cylinder 71 is fixedly installed at the bottom of the inner cavity of tank 1 and located below piston A 61, and a hole is opened on buffer cylinder 71 for connecting rod B 8 to pass through; piston B 73 is fixedly installed at the bottom end of connecting rod B 8 and slidably connected to the inner side of buffer cylinder 71, piston B 73 divides the space inside buffer cylinder 71 into space A and space B, space A is located above piston B 73 and space B is located below piston B 73; reset component C 74 is set inside buffer cylinder 71 and located at the bottom of piston B 73; air inlet pipe 4 is set on buffer cylinder 71 and used to connect space A with the outside.

[0039] Tank 1 is made of stainless steel. The water inlet pipe 3 is fixedly installed on the lower part of the outer wall of tank 1. After the liquid enters tank 1 through the water inlet pipe 3, the liquid enters the top of piston A 61 inside tank 1 through the flow pipe 65 and the water-blocking one-way valve. When the water in tank 1 is full, the solenoid valve 2 opens and the liquid in tank 1 flows out. The fixed end of the solenoid valve 2 is fixedly installed on the top of tank 1.

[0040] When water flows under certain pressure in a pipe, and the pressure fluctuates drastically due to a sudden change in the flow rate, a pressure surge occurs in the pipe, which can easily cause the pipe to rupture.

[0041] This solution involves setting up tank 1 along a long-distance water pipe for liquid transfer. When the water pressure suddenly changes, the water continues to flow due to its potential energy. Water below piston A 61 continues to move towards the top of piston A 61. When the subsequent water pressure is insufficient, the water-blocking check valve closes. The water pressure above piston A 61 is greater than the water pressure below piston A 61, causing the water-blocking check valve to close again. The increased water pressure above piston A 61 will impact the inner wall of tank 1. At this time, under the back pressure, piston A 61 pushes piston B 73 downward along the opening of buffer cylinder 71 via connecting rod B 8. The length of reset piece C 74 is compressed, and the air in space B is also compressed to reduce the impact of the water flow. The compressed air in space B is replenished by the gas in space A through air inlet pipe 4, reducing the impact of the water flow on the water pipe, mitigating water hammer, and thus reducing the possibility of pipe rupture.

[0042] In one embodiment of this utility model, the water-blocking check valve includes:

[0043] The limiting shell 62 is fixedly installed on the top of piston A 61;

[0044] A sealing plate 64 is disposed inside the limiting shell 62 and located at the top of the flow tube 65;

[0045] A reset member 63 is disposed inside the limiting shell 62 and located on the top of the A sealing plate 64. The A reset member 63 abuts against and connects the A sealing plate 64 and the limiting shell 62.

[0046] The limiting shell 62 is fixedly installed on the top of piston A 61. The size of sealing plate A 64 is larger than the size of the opening of the flow pipe 65. Sealing plate A 64 can completely block the top opening of the flow pipe 65 when it obstructs the flow of liquid from the top of piston A 61 to the bottom of piston A 61. Reset component A 63 is a damping spring with galvanized outer side. Reset component A 63 can drive sealing plate A 64 to block flow pipe 65 when the water pressure at the bottom of piston A 61 is not higher than the water pressure at the top. The two ends of reset component A 63 are fixedly connected to sealing plate A 64 and limiting shell 62 respectively. Reset component A 63 abuts against sealing plate A 64.

[0047] In one embodiment of this utility model, a space C is provided inside the piston A 61. The space C is connected to the space above the piston A 61 in the tank body 1. A movable plate 66 is slidably installed inside the space C. The movable plate 66 is slidably connected to the outside of the flow pipe 65. A connecting rod A 68 is fixedly installed at the bottom of the movable plate 66. A hole is opened at the bottom of the piston A 61 for the connecting rod A 68 to pass through. A reset member B 67 is sleeved on the outside of the connecting rod A 68. The two ends of the reset member B 67 abut against the movable plate 66 and the bottom of the space C, respectively.

[0048] Water hammer occurs when air bubbles are present in the water being transported by the pipe. When water carrying air bubbles enters the area above piston A 61 from below, the volume of the air bubbles expands due to the pressure change. This expansion pushes the movable plate 66 to press the B reset piece 67 downwards, increasing the volume above piston A 61 and mitigating the water hammer phenomenon. The B reset piece 67 is a galvanized damping spring that abuts against piston B 73. The A connecting rod 68 passes through the opening at the bottom of piston A 61 and can move up and down along the opening.

[0049] In one embodiment of this utility model, two limiting rings 72 are symmetrically fixedly installed on the inner wall of the buffer cylinder 71. The two limiting rings 72 are used to limit the range of motion of piston B 73 within the buffer cylinder 71.

[0050] Two limiting rings 72 are arranged vertically. The top of the upper limiting ring 72 is not higher than the through hole at the connection between the intake pipe 4 and the buffer cylinder 71. The outer side of the limiting ring 72 is covered with wear-resistant rubber. The two limiting rings 72 are used to limit the vertical movement path of the B piston 73 and reduce damage to the C reset component 74. The C reset component 74 is a galvanized damping spring.

[0051] In one embodiment of this utility model, a B one-way valve 75 is provided at the bottom of the B piston 73, which allows air to flow from space A into space B in one direction.

[0052] The fixed end of the B check valve 75 is mounted on the B piston 73. When the gas pressure in space B is less than the gas pressure in space A, the B check valve 75 opens to supply air to space B, and closes otherwise.

[0053] In one embodiment of this utility model, the connection between the water inlet pipe 3 and the tank 1 is located below piston A 61, and the solenoid valve 2 is located above piston A 61.

[0054] The fixed end of the solenoid valve 2 is fixedly installed on the top of the tank 1 and is used to control the outflow of liquid in the tank 1 or block the outflow of liquid.

[0055] In one embodiment of this utility model, the connection between the air intake pipe 4 and space A is located above the limiting ring 72.

[0056] The limiting ring 72 can also prevent the B piston 73 from moving too far and obstructing the air intake pipe 4 from supplying air to space A. One end of the air intake pipe 4 is fixedly connected to the buffer cylinder 71, and the other end passes through and extends to the outside of the tank body 1. The connection between the two is sealed and fixed.

[0057] In one embodiment of this utility model, a detachable one-way valve 5 is installed at one end of the air inlet pipe 4 located outside the tank body 1. The one-way valve 5 allows external gas to flow into space A in one direction.

[0058] The fixed end of the one-way valve 5 is threadedly connected to the end of the air inlet pipe 4 located on the outside of the tank 1. When the water pressure in the tank 1 is unstable and water hammer occurs frequently, the one-way valve 5 prevents the air from flowing out of space A, increases the gas pressure in space A and space B, enhances the buffer against water hammer, and reduces the possibility of pipe rupture.

[0059] Working Principle: During operation of the buffer tank in a long-distance pressurized water transmission system, water enters tank 1 through inlet pipe 3 during normal filling. It first fills the space below piston A 61, generating pressure at the bottom. At this time, the limiting shell 62 in the water-blocking check valve is fixed to the top of piston A 61. Sealing plate A 64 seals the top of the flow pipe 65 within the limiting shell 62. Reset component A 63 prevents water from flowing upwards through sealing plate A 64 to maintain stable water pressure. If air bubbles are introduced into inlet pipe 3 during filling, these bubbles expand above piston A 61, pushing movable plate 66. Movable plate 66 slides within space C inside piston A 61. The expansion of the bubbles causes movable plate 66 to move downwards, increasing the volume above piston A 61. According to Boyle's Law, this reduces water hammer impact. After the bubbles are expelled or the pressure balances, reset component B 67 returns movable plate 66 to its original position. During normal drainage, solenoid valve 2 is opened, and water flows out stably from tank 1. Piston A 61 remains essentially stationary, preventing water hammer. When the water flows upward below piston A 61, if the water pressure is insufficient to open the A sealing plate 64 of the water-blocking check valve, the A reset piece 63 keeps it closed. The water pressure above piston A 61 increases and impacts the inner wall of tank 1. At this time, piston A 61 pushes piston B 73 down along buffer cylinder 71 through connecting rod B 8. The C reset piece 74 inside buffer cylinder 71 is compressed, and the air in space B is also compressed. According to the ideal gas law, a reaction force is generated to reduce the impact. Two limit rings 72 are symmetrically fixed on the inner wall of buffer cylinder 71 to limit the range of motion of piston B 73. The B check valve 75 at the bottom of piston B 73 opens when the air pressure in space B is less than that in space A, allowing air to enter in one direction. When the air pressure is greater than that, it closes to prevent backflow. The A check valve 5 installed at one end of the air inlet pipe 4 outside tank 1 obstructs the air outflow from space A when the water pressure is unstable and water hammer occurs frequently, maintaining a higher gas pressure in space A to enhance the buffering effect and reduce the risk of pipe rupture.

[0060] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A buffer tank for a long-distance pressurized water conveyance system, comprising a tank body (1), characterized in that, Also includes: A water inlet pipe (3) is provided on one side of the tank (1), and the water inlet pipe (3) is used to inject liquid into the tank (1); Solenoid valve (2), which is installed at the top of tank (1) and is used to control the outflow of liquid in tank (1); Piston A (61) is slidably mounted inside the tank (1); A flow tube (65) is fixedly installed on piston A (61), and the flow tube (65) connects the top and bottom ends of piston A (61); A water-blocking check valve is disposed on top of piston A (61) and above flow tube (65), the water-blocking check valve allowing liquid to flow unidirectionally from below flow tube (65) to above flow tube (65); B connecting rod (8) is fixedly installed at the bottom end of A piston (61); The buffer cylinder (71) is fixedly installed at the bottom of the inner cavity of the tank (1) and located below the piston (61) A. The buffer cylinder (71) has a hole for the connecting rod (8) to pass through. Piston B (73) is fixedly installed at the bottom of connecting rod B (8) and slidably connected to the inside of buffer cylinder (71). Piston B (73) divides the space inside buffer cylinder (71) into space A and space B. Space A is located above piston B (73) and space B is located below piston B (73). C reset component (74) is disposed inside the buffer cylinder (71) and located at the bottom of piston B (73); An air intake pipe (4) is installed on a buffer cylinder (71) and is used to connect space A with the outside.

2. The buffer tank for a long-distance pressurized water conveyance system according to claim 1, characterized in that, The water-blocking check valve includes: A limiting shell (62) is fixedly installed on the top of piston A (61); A sealing plate (64) is disposed inside the limiting shell (62) and located at the top of the flow tube (65); A reset member (63) is disposed inside the limiting shell (62) and located on the top of the A sealing plate (64). The A reset member (63) abuts against the A sealing plate (64) and the limiting shell (62).

3. A buffer tank for a long-distance pressurized water conveyance system according to claim 1, characterized in that, A space C is provided inside the piston A (61). The space C is connected to the space above the piston A (61) in the tank (1). A movable plate (66) is slidably installed inside the space C. The movable plate (66) is slidably connected to the outside of the flow pipe (65). A connecting rod A (68) is fixedly installed at the bottom of the movable plate (66). A hole is opened at the bottom of the piston A (61) for the connecting rod A (68) to pass through. A reset piece B (67) is sleeved on the outside of the connecting rod A (68). The two ends of the reset piece B (67) abut against the movable plate (66) and the bottom of the space C, respectively.

4. A buffer tank for a long-distance pressurized water conveyance system according to claim 1, characterized in that, Two limiting rings (72) are symmetrically fixedly installed on the inner wall of the buffer cylinder (71). The two limiting rings (72) are used to limit the range of motion of piston B (73) within the buffer cylinder (71).

5. A buffer tank for a long-distance pressurized water conveyance system according to claim 1, characterized in that, The bottom of the piston B (73) is provided with a one-way valve B (75), which allows air to flow from space A into space B in one direction.

6. A buffer tank for a long-distance pressurized water conveyance system according to claim 1, characterized in that, The connection between the water inlet pipe (3) and the tank (1) is located below piston A (61), and the solenoid valve (2) is located above piston A (61).

7. A buffer tank for a long-distance pressurized water conveyance system according to claim 4, characterized in that, The air intake pipe (4) is located above the limiting ring (72) at the point where it connects with space A.

8. A buffer tank for a long-distance pressurized water conveyance system according to claim 1, characterized in that, The air inlet pipe (4) is equipped with a detachable A one-way valve (5) at one end located outside the tank body (1). The A one-way valve (5) allows external gas to flow into the A space in one direction.

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