Water hammer buffer protection device suitable for bent pipeline

Abstract

The invention provides a water hammer buffer protection device suitable for a bent pipeline, an air bag assembly used for moving in a pipeline assembly is slidably mounted in the pipeline assembly, and the air bag assembly is fixedly provided with a power assembly; the water pressure buffering assembly used for preventing a pipeline from being damaged by a water hammer is fixedly installed on the power assembly, the air pressure buffering assembly is fixedly installed between the pipeline assembly and the water pressure buffering assembly, the problem that the pipeline is damaged by the water hammer during long-distance water conveying is solved, and then protection of the pipeline and a water pump is achieved.

Description

Technical Field

[0001] The present invention relates to the field of water pipeline protection equipment, and specifically to a water hammer buffer protection device applicable to bent pipelines. Background Art

[0002] When the water pump system is working, changes in water pressure are inevitable. Especially when the valve is closed, the pressure will instantaneously rebound, generating a pressure wave called "water hammer". The water hammer will bring great impact and noise to the water pump system, and in severe cases, it may even damage the components in the system. The water pump water hammer protection device consists of components such as an air tank, a unidirectional pressure regulating tower, an air valve, and a pressure relief valve. When the water pump starts, the unidirectional pressure regulating tower fills water into the water chamber through a water supply pipe. When the water level reaches the normal water level, the float valve at the outlet of the water supply pipe closes, automatically maintaining the water level in the water chamber; when the pump stops, the check valve of the unidirectional pressure regulating tower quickly opens, and replenishes water to the main pipeline through a connecting short pipe, thereby achieving the effect of preventing water hammer.

[0003] However, when supplying water to high-rise buildings, the water flow often moves upward along the pipeline. If the water supply is insufficient, a water hammer effect will occur. The water hammer effect will occur both when the valve is opened and when it is closed. When the valve is opened, the water flow suddenly flowing into the pipeline will form a negative pressure in the pipeline. At this time, due to the blocking effect of the pipeline bend on the water flow, there will be a greater impact force on the pipeline bend at the same time, which is likely to cause damage to the pipeline bend; when the valve is closed, the rapid backflow of the water flow will cause damage to the pipeline or the water pump, and since the pipeline is mostly buried underground, it is difficult to replenish gas to the water hammer protection device to ensure its working reliability.

[0004] For this reason, the prior art has given some solutions. Through the combined action of the inner piston buffer part, the outer pressure stabilizing and guiding part, and the upper piston and the lower pressure regulating piston inside it, the water flow in the high-pressure chamber of the pipe network flows through the upper piston into the lower pressure regulating chamber, thereby preventing water hammer from occurring, and at the same time relying on the pressure regulating spring for reset. However, it is difficult to effectively buffer water hammer when the pipeline is laid at a high altitude and has many bends. Summary of the Invention

[0005] The present invention provides a water hammer buffer protection device applicable to bent pipelines. The buffer protection device utilizes the principle of pressure relief and buffering, and protects the water pump and the pipeline by distinguishing the different impact positions of positive and negative water hammers.

[0006] To achieve the above object, the present invention provides the following technical solutions: A water hammer buffer protection device applicable to bent pipelines provided by the present invention includes a pipeline assembly, an airbag assembly, a power assembly, a water pressure buffer assembly, an air pressure buffer assembly, and a control assembly. The airbag assembly for moving within the pipeline assembly is slidably installed within the pipeline assembly. The power assembly is fixedly installed on the airbag assembly. The water pressure buffer assembly for preventing the pipeline from being damaged by water hammer is fixedly installed on the power assembly. Thus, the airbag assembly drives the power assembly. When the power assembly operates, it reacts on the airbag assembly to control the intermittent opening or closing of the airbag assembly. At the same time, the power assembly drives the water pressure buffer assembly to discharge water, thereby protecting the control assembly from being damaged by water hammer. The air pressure buffer assembly is fixedly installed between the pipeline assembly and the water pressure buffer assembly, thereby protecting the valve by the air pressure buffer assembly.

[0007] When the valve is closed, the water flow pressure rebounds instantaneously, generating a pressure wave and causing water hammer. At this time, the airbag assembly is driven by the water flow and moves to the bend of pipeline 1 to protect the pipeline assembly. At the same time, it drives the power assembly to operate. The power assembly drives the water pressure buffer assembly, and the water in the water pressure buffer assembly flows out to protect the pipeline assembly and the water pump. The water flow flows into the air pressure buffer assembly, compressing the high-pressure gas in the air pressure buffer assembly to play a buffering role. When the water hammer ends, the water flow pushes the airbag assembly back to its original position, then drives the power assembly to reverse, replenishing the water in the pipeline assembly back into the water pressure buffer assembly. At the same time, the gas in the water pressure buffer assembly is introduced into the airbag assembly, and the power assembly reacts on the airbag assembly to close the valve of the airbag assembly and stop the intake of air.

[0008] Preferably, the pipeline assembly includes a water supply pipe and a convex block. The water supply pipe is in a right angle. A chute is opened in the vertical part of the water supply pipe. The airbag assembly is slidably installed in the chute of the water supply pipe. Its function is that the airbag assembly is driven by water hammer to slide along the chute, thereby driving the movement of the power assembly. At the same time, the airbag assembly seals the water supply pipe, thereby preventing the water in the water supply pipe from flowing out of the pipeline. The convex block is welded to the inner wall of the water supply pipe. The convex block increases the thickness of the water supply pipe, enhancing the strength of the water supply pipe. At the same time, when the airbag assembly moves, it is lifted by the convex block, improving the protection effect of the airbag assembly on the water supply pipe. The convex block is arc-shaped, thereby preventing the convex block from damaging the airbag assembly.

[0009] It should be noted that when the valve in the water supply pipe is closed, the high-lift water flow in the water supply pipe quickly drops, which drives the airbag assembly to slide in the chute. When the airbag assembly slides to the bump, it is blocked and decelerated by the bump, preventing the airbag assembly from colliding with the chute of the water supply pipe and causing damage to the water supply pipe. When the water flow in the water supply pipe is flowing normally, it pushes the airbag assembly back to its original position. At this time, the water flow is slower, and the impact force when the airbag assembly returns to its original position is not large enough to damage the water supply pipe.

[0010] Preferably, the airbag assembly includes a high-pressure airbag, a high-pressure air valve, and a connecting block. The connecting block is slidably connected to the water supply pipe, and the high-pressure airbag is adhesively connected to the connecting block. Thus, when water hammer occurs, the water in the water supply pipe drives the high-pressure airbag and the connecting block to slide in the water supply pipe. The connecting block is key-connected to the power assembly, so that when the connecting block slides in the water supply pipe, it drives the power assembly to work, and the power assembly controls the opening or closing of the high-pressure air valve.

[0011] When water hammer occurs, the water flow in the water supply pipe impacts the high-pressure airbag, and then the high-pressure airbag is washed to the bump, so that the high-pressure airbag is washed to the 90-degree bend of the water supply pipe to protect the pipeline. The connecting block is driven by the airbag assembly from the initial position to the limit position, which drives the power assembly to move. At the same time, the high-pressure air valve is a three-position two-way solenoid valve, and the solenoid valve is connected to a travel switch. After the power assembly approaches the travel switch, the high-pressure air valve opens, and the gas in the high-pressure airbag flows to the water pressure buffer assembly, thereby improving the working effect of the water pressure buffer assembly. Then the power assembly contacts the travel switch for the second time and closes the solenoid valve. At this time, the high-pressure airbag no longer inflates the water pressure buffer assembly. When the water hammer ends, the water flow in the water supply pipe drives the high-pressure airbag to return to its original position, and at the same time, the power assembly reverses. At the same time, the power assembly contacts the travel switch for the third time and opens the high-pressure air valve. The water flow flows into the water pressure buffer assembly and presses the gas in the water pressure buffer assembly into the high-pressure airbag assembly. Then the power assembly contacts the travel switch for the fourth time and closes the high-pressure air valve.

[0012] Preferably, the power assembly includes a first rack, a second rack, a gear, a crank, a connecting rod, a slider and a chute. The first rack is key-connected to the connecting block. The first rack meshes with the gear, and the second rack meshes with the gear. Thus, when the connecting block drives the first rack to slide, the gear rotates, driving the second rack to move upward. The lengths of the first rack and the second rack are between 2 times the circumference of the gear and 3 times the circumference of the gear. The function is that the gear rotates two weeks between the first rack and the second rack, and the slider moves twice in the chute during one water hammer occurrence. Thus, the high-pressure airbag is quickly opened and then slowly closed during one water hammer occurrence. The gear is coaxially hinged with the crank, so that when the gear rotates, it drives the crank to make a circular motion. One end of the crank away from the gear is hinged with the connecting rod, and one end of the connecting rod away from the crank is hinged with the slider. The slider is slidably connected to the chute. Thus, the crank makes a circular motion around the axis of the gear, driving the connecting rod to swing, and then driving the slider to slide in the chute. When the slider slides to the extreme position close to the high-pressure airbag side, the air valve is controlled to open or close.

[0013] When water hammer occurs, the high-pressure airbag drives the first rack through the connecting block. Then the first rack drives the gear to rotate, driving the second rack to move upward. The gear drives the crank to make a circular motion around the axis of the gear. At the same time, the crank drives the connecting rod to swing, and the connecting rod drives the slider to move along the chute. The first time the slider contacts the travel switch connected to the high-pressure air valve is the return stroke of the slider, thus quickly opening the high-pressure air valve. The next movement is the forward stroke, thus slowly closing the high-pressure air valve. Thus, the gas in the high-pressure airbag flows to the water pressure buffer assembly, improving the working effect of the water pressure buffer assembly.

[0014] It should be noted that the ratio of the length of the crank to the length of the connecting rod includes but is not limited to 2:3. Thus, the extreme position angle of the crank-slider mechanism formed by the crank, the connecting rod and the slider is 60°, and the speed ratio of the forward and return strokes of the slider is 1:2, realizing that the high-pressure air valve is quickly opened and slowly closed.

[0015] Preferably, the water pressure buffer assembly includes a connecting rod, a connecting pipe, a piston, a water tank, a check valve and a top plate. The connecting rod is key-connected to the second rack. One end of the connecting rod away from the second rack is welded with the piston. Thus, when the second rack moves, it drives the connecting rod to move, and then pushes the piston to move. There are holes in the water tank. The connecting rod is in clearance fit with the holes. There are limiting holes under the water tank. Thus, when the connecting rod drives the piston to move, it will not deviate to cause the piston to collide with the water tank. The piston is fixedly connected to one side of the top plate for reducing water loss in the water tank. Its function is to use the water flow to push the piston to move, so as to enable the water in the water tank to flow into the water supply pipe when water hammer occurs, preventing the water hammer from damaging the water supply pipe. The check valve is fixedly connected to the other side of the top plate. The top plate and the check valve are connected by a knot, thereby improving the working effect of the check valve.

[0016] When the second rack drives the connecting rod to move upward, the connecting rod drives the piston to move upward. The skirt of the piston leaves the bottom surface of the water tank, and the water in the water tank flows into the water supply pipe. The water flow direction is opposite to the high-lift water flow direction in the water supply pipe, thereby realizing the protection of the water supply pipe and the check valve. At the same time, the high-pressure air valve opens, and the gas in the high-pressure air bag flows into the water tank through the connecting pipe. At this time, the high-pressure air bag contacts the convex block, and the convex block exerts a squeezing effect on the high-pressure air bag, increasing the speed of the gas flowing into the water tank, further increasing the water flow speed in the water tank, and improving the protection effect of the water pressure buffer assembly; when the water hammer ends, the water flow drives the high-pressure air bag assembly to return to its original position. The high-pressure air bag drives the first rack to move in the reverse direction through the connecting block, so that the gear rotates in the reverse direction, driving the second rack to move in the reverse direction, and the piston moves downward. At the same time, the high-pressure air valve opens, the head of the piston moves away from the water tank, and the water in the water supply pipe flows into the water tank, and the gas in the water tank is filled into the high-pressure air bag through the connecting pipe, realizing the circulation of the gas in the high-pressure air bag.

[0017] Preferably, the air pressure buffer assembly includes a buffer tank, a gas discharge port, an inner tank and a high-pressure gas chamber. The inner tank is arranged in the buffer tank. A high-pressure gas chamber for buffering and shock absorption is provided between the buffer tank and the inner tank. The gas discharge port is arranged on the buffer tank, and its function is to supplement gas to the high-pressure gas chamber. A pressure gauge is installed between the buffer tank and the water supply pipe to monitor the change of the gas pressure inside the buffer tank so as to adjust it in time.

[0018] After the high-lift water flow in the water supply pipe passes through the water pressure buffer assembly, there is still some pressure. At this time, the water flows into the buffer tank. The inner tank is made of flexible material, and the high-pressure gas chamber is filled with high-pressure gas. After the water pressure flows into the buffer tank, it is buffered by the high-pressure gas, further preventing the water pump and the check valve from being damaged.

[0019] The beneficial effects of the present invention are as follows: 1. The present invention adopts the principle of pressure relief and buffering. By distinguishing the different impact positions of positive and negative water hammers, the airbag assembly drives the power assembly to work, and the reaction of the power assembly acts on the airbag assembly to control the opening or closing of the high-pressure air valve of the airbag assembly. Then, gas enters the water pressure buffering assembly, and the airbag can move to the bending part of the water supply pipe to form physical protection.

[0020] 2. The present invention is based on the principle of power transmission and work done. Through the cooperation of the airbag assembly and the water pressure buffering assembly, when a water hammer occurs, the gas in the high-pressure airbag is introduced into the water tank to improve the working effect of the water pressure buffering assembly. At the same time, after the water pressure buffering assembly finishes working, the gas is introduced into the high-pressure airbag, realizing the recycling of the gas in the high-pressure airbag.

[0021] 3. The present invention is based on the principles of fluid mechanics and dynamics. The air pressure buffering assembly is used to absorb the kinetic energy of the water flow, and the water pressure buffering assembly releases the potential energy of the water in the water tank. Then, by releasing the water flow, the reverse impact force brought by the water hammer is offset, achieving the effect of protecting the pipeline and valve at the bending part. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The present invention will be further described below in conjunction with the drawings and embodiments.

[0023] Figure 1 is the overall schematic diagram of the embodiment of the present invention; Figure 2 is the front view of the embodiment of the present invention; Figure 3 is Figure 1 the cross-sectional view at A-A in Figure 4 is the overall schematic diagram of the airbag assembly of the present invention; Figure 5 is the overall schematic diagram of the power assembly of the present invention; Figure 6 is the schematic diagram of the cooperation between the airbag assembly and the first rack of the present invention; Figure 7 is the left view of the water pressure buffering assembly of the present invention; Figure 8 is Figure 7 the cross-sectional view at B-B in In the figure, 1 is a water conveyance pipeline; 11 is a water supply pipe; 12 is a bump; 13 is a chute; 2 is a pneumatic buffer assembly; 21 is a buffer tank; 22 is a gas discharge port; 23 is an inner tank; 24 is a high-pressure gas chamber; 3 is an airbag assembly; 31 is a high-pressure airbag; 32 is a high-pressure air valve; 33 is a connection block; 4 is a power assembly; 41 is a first rack; 42 is a second rack; 43 is a gear; 44 is a crank; 45 is a connecting rod; 46 is a slider; 47 is a chute; 5 is a water pressure buffer assembly; 51 is a connecting rod; 52 is a connecting pipe; 53 is a piston; 54 is a water tank; 55 is a check valve; 56 is a top plate. Specific Embodiment

[0024] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention.

[0025] As Figures 1 to 2 shown, the first specific embodiment of the present invention is shown. An airbag assembly 3 is slidably installed in a pipeline assembly 1, thereby realizing the movement of the airbag assembly 3 in the pipeline assembly 1. The airbag assembly 3 is fixedly installed with a power assembly 4, and the power assembly 4 is fixedly installed with a water pressure buffer assembly 5, thereby realizing that the airbag assembly 3 drives the power assembly 4. When the power assembly 4 works, it reacts on the airbag assembly 3 to control the intermittent opening or closing of the airbag assembly 3. At the same time, the power assembly 4 drives the water pressure buffer assembly 5 to discharge water, thereby protecting the control assembly from being damaged by water hammer.

[0026] The initial water flow is from the horizontal end of the pipeline to the upper part of the pipeline. When the valve at the left end of the pipeline is suddenly closed, at this time, the water flow in the vertical pipeline has no water thrust and will quickly flow downward, which is likely to affect the bent part. And the group safety assembly is located inside the pipeline at this time, and the airbag assembly will not be interfered by the normal flow of the water in the pipeline. However, after the valve is closed, the water flow will flow backward, and then fall from a high place to a low place, thereby impacting the airbag assembly. The airbag assembly deforms and drives the power assembly to work. On the one hand, it realizes the buffering of the water flow, and on the other hand, it uses the power assembly to drive the water pressure buffer assembly to work, providing a certain amount of counterflow water, thereby reducing the damage of the water flow to the valve.

[0027] Although there are also devices in the prior art that can realize the protection of pipelines, first of all, some devices can only protect against positive water hammer, and negative water hammer also has a certain damage to pipelines. Therefore, it is also necessary to protect against negative water hammer of pipelines. In this application, the water pressure buffer assembly 5 protects against positive water hammer and negative water hammer through two working modes.

[0028] As Figure 3As shown in the figure, the pipeline component 1 includes a water supply pipe 11 and a bump 12. The water supply pipe 11 is at a right angle. A chute 13 is opened in the vertical part of the water supply pipe 11. The chute 13 is 10 mm deep and 220 mm long. An airbag assembly 3 is slidably installed in the chute of the water supply pipe 11. The fit between the airbag assembly 3 and the chute is a clearance fit, and the airbag assembly 3 is in close contact with the inner wall of the water supply pipe 11. Its function is that the airbag assembly 3 is driven by water hammer to slide along the chute, thereby driving the power assembly 4 to move. At the same time, the airbag assembly 3 seals the water supply pipe 11, so as to prevent the water in the water supply pipe 11 from flowing out of the pipeline. A bump 12 is welded to the inner wall of the water supply pipe 11. The bump 12 is arc-shaped with an arc radius of 5 mm, so as to prevent the bump 12 from damaging the airbag assembly 3. The bump 12 increases the thickness of the water supply pipe 11, strengthens the strength of the water supply pipe 11, and at the same time enables the airbag assembly 3 to be lifted by the bump 12 when moving, improving the protection effect of the airbag assembly 3 on the water supply pipe 11.

[0029] When the valve in the water supply pipe 11 is closed, the high-lift water flow in the water supply pipe 11 quickly drops, thereby driving the airbag assembly 3 to slide downward in the chute 13. When the airbag assembly 3 slides to the bump 12, it is blocked and decelerated by the bump 12, preventing the airbag assembly 3 from colliding with the chute 13 of the water supply pipe 11 and causing damage to the water supply pipe 11. When the water flow in the water supply pipe 11 flows normally, it pushes the airbag assembly 3 back to its position. At this time, the water flow is slower, and the impact force when the airbag assembly 3 returns to its position is not large, so it will not damage the water supply pipe 11.

[0030] As Figures 3 to 4 As shown in the figure, the connecting block 33 is slidably connected to the water supply pipe 11. The connecting block 33 is a cross-shaped structure with a vertical part height of 20 mm, a horizontal part of 320 mm, and a thickness of 10 mm. The high-pressure airbag 31 is adhesively connected to the vertical part of the connecting block 33. Thus, when water hammer occurs, the water in the water supply pipe 11 drives the high-pressure airbag 31 and the connecting block 33 to slide in the water supply pipe 11. The high-pressure airbag 31 is 10 mm thick. According to the GB150 standard, the high-pressure airbag 31 is made of rubber material. The connecting block 33 is key-connected to the power assembly 4. Thus, when the connecting block 33 slides in the water supply pipe 11, it drives the power assembly 4 to work, and thus the power assembly 4 controls the high-pressure air valve 32 to open or close.

[0031] One way is a telescopic rod at the end of the connecting block to achieve sealing. The telescopic rod is transmitted to the first rack through a connecting rod, so that the first rack can slide up and down. When a closing valve water hammer occurs, the water flow in the water supply pipe 11 impacts the high-pressure airbag 31. Then, the high-pressure airbag 31 is washed to the bump 12, and further, the high-pressure airbag 31 is washed to the 90-degree bend of the water supply pipe 11 to protect the pipe bending part, avoiding damage caused by impact at the bending part under excessive water pressure. The connecting block 33 is driven by the airbag assembly 3 from the initial position to the limit position, thereby driving the power assembly 4 to move. At the same time, the high-pressure air valve 32 is a three-position two-way solenoid valve, and the solenoid valve structure is designed in accordance with the national standard (GB): GB / T 12238. The solenoid valve is connected with a travel switch. After the power assembly 4 approaches the travel switch, the high-pressure air valve 32 opens, and the gas in the high-pressure airbag 31 flows to the water pressure buffer assembly 5, thereby improving the working effect of the water pressure buffer assembly 5. Then, when the power assembly 4 contacts the travel switch for the second time, the solenoid valve is closed. At this time, the high-pressure airbag 31 no longer inflates the water pressure buffer assembly 5. When the water hammer ends, the water flow in the water supply pipe 11 drives the high-pressure airbag 31 to return to its original position. At the same time, the power assembly 4 rotates in reverse. At the same time, when the power assembly 4 contacts the travel switch for the third time, the high-pressure air valve 32 is opened, and the water flow flows into the water pressure buffer assembly 5 and presses the gas in the water pressure buffer assembly 5 into the high-pressure airbag 31 assembly 3. Then, when the power assembly 4 contacts the travel switch for the fourth time, the high-pressure air valve 32 is closed.

[0032] Such as Figures 5 to 6As shown in the figure, the power assembly 4 includes a first rack 41, a second rack 42, a gear 43, a crank 44, a connecting rod 45, a slider 46, and a chute 1347. The first rack 41 is key-connected to the connecting block 33. The first rack 41 meshes with the gear 43, and the second rack 42 meshes with the gear 43. Thus, when the connecting block 33 drives the first rack 41 to slide, the gear 43 rotates, driving the second rack 42 to move upward. The number of teeth of the first rack 41 and the second rack 42 is 100, the module is 2, the tooth width is 240 mm, and the thickness is 100 mm. The gear 43 is a gear with 40 teeth and a module of 2. Its tooth width is 200 mm, and a shaft hole with a diameter of 25 mm is provided in the axial direction. A keyway is provided at the shaft hole. Its function is that the gear 43 rotates two weeks between the first rack 41 and the second rack 42, and the slider 46 moves twice in the chute 1347 during one water hammer occurrence. The gear 43 is coaxially hinged with the crank 44. The length of the crank 44 is 280 mm, and the thickness is 20 mm. Thus, when the gear 43 rotates, it drives the crank 44 to make a circular motion. One end of the crank 44 away from the gear 43 is hinged with the connecting rod 45. The length of the connecting rod 45 is 420 mm, and the thickness is 20 mm. One end of the connecting rod 45 away from the crank 44 is hinged with the slider 46. The slider 46 is a fillet rectangle structure. The thickness of the slider 46 is 60 mm, and the length and width are both 120 mm. The slider 46 is slidably connected to the chute 1347, and the chute 1347 is in clearance fit with the slider 46. Thus, the crank 44 makes a circular motion around the axis of the gear 43, driving the connecting rod 45 to swing, and then driving the slider 46 to slide in the chute 1347. When the slider 46 slides to the extreme position close to the high-pressure airbag 31, the control air valve is opened or closed.

[0033] When water hammer occurs, the high-pressure airbag 31 drives the first rack 41 to move downward through the connecting block 33. Then, the first rack 41 drives the gear 43 to rotate, driving the second rack 42 to move upward. The gear 43 drives the crank 44 to make a circular motion around the axis of the gear 43. At the same time, the crank 44 drives the connecting rod 45 to swing, and the connecting rod 45 drives the slider 46 to move along the chute 13. The first contact of the slider 46 with the travel switch connected to the high-pressure air valve 32 is the return stroke of the slider 46. Thus, the high-pressure air valve 32 is quickly opened. The next movement is the forward movement, thus slowly closing the high-pressure air valve 32. Thus, the gas in the high-pressure airbag 31 flows to the water pressure buffer assembly 5, driving the water pressure buffer assembly 5 to work.

[0034] The extreme position angle of the crank-slider mechanism formed by the crank 44, the connecting rod 45, and the slider 46 is 60°. The speed ratio of the forward and return strokes of the slider 46 is 1:2, realizing that the high-pressure air valve 32 is quickly opened and slowly closed.

[0035] As Figures 7 to 8As shown in the figure, the connecting rod 51 is key-connected to the second rack 42. The connecting rod 51 is an L-shaped shaft with a diameter of 130 mm and lengths and heights of 520 mm. A piston 53 is welded to one end of the connecting rod 51 away from the second rack 42. Thus, when the second rack 42 moves, it drives the connecting rod 51 to move up and down, and then pushes the piston 53 to move. The water tank 54 is a cube structure with a length of 600 mm. There is a hole on the water tank 54 with a hole diameter of 130 mm. The connecting rod 51 has a clearance fit with the hole. There is a limiting hole with a diameter of 190 mm under the water tank 54. Thus, when the connecting rod 51 drives the piston 53 to move, it will not shift and cause the piston 53 to collide with the water tank 54. The piston 53 is fixedly connected to a top plate 56. Its function is to use the water flow to push the piston 53 to move. Thus, the water in the water tank 54 can flow into the water supply pipe 11 when a water hammer occurs, preventing the water hammer from damaging the water supply pipe 11. The check valve 55 is connected to the top plate 56 by a knot. Thus, when the check valve 55 closes, the top plate 56 is driven to move downward, realizing the rapid downward movement of the piston 53, reducing the loss of water in the water tank 54. At the same time, when the piston 53 moves upward, the top plate 56 drives the check valve 55 to open and prevents the check valve 55 from being washed back to the closed state by the water flow, improving the working reliability of the check valve 55.

[0036] Based on this solution, when the second rack 42 drives the connecting rod 51 to move upward, the connecting rod 51 drives the piston 53 to move upward. The skirt of the piston 53 leaves the bottom surface of the water tank 54, and the water in the water tank 54 flows into the water supply pipe 11. The water flow direction is opposite to the high-lift water flow direction in the water supply pipe 11. Thus, the protection of the water supply pipe 11 and the check valve 55 is realized. At the same time, the high-pressure air valve 32 is opened, and the gas in the high-pressure air bag 31 flows into the water tank 54 through the connecting pipe 52. At this time, the high-pressure air bag 31 contacts the convex block 12, and the convex block 12 exerts a squeezing effect on the high-pressure air bag 31, increasing the speed of the gas flowing into the water tank 54, further increasing the water flow speed in the water tank 54, and improving the protection effect of the water pressure buffer assembly 5. When the water hammer ends, the water flow drives the high-pressure air bag 31 assembly 3 to return to its original position. The high-pressure air bag 31 drives the first rack 41 to move in the reverse direction through the connecting block 33, so that the gear 43 rotates in the reverse direction, driving the second rack 42 to move in the reverse direction, and the piston 53 moves downward. At the same time, the high-pressure air valve 32 is opened, the head of the piston 53 is away from the water tank 54, and the water in the water supply pipe 11 flows into the water tank 54 and fills the gas in the water tank 54 into the high-pressure air bag 31 through the connecting pipe 52, realizing the circulation of the gas in the high-pressure air bag 31.

[0037] As Figures 1 to 4 As shown in the figure, an inner tank 23 is arranged in the buffer tank 21. A high-pressure air chamber 24 for buffering and shock absorption is provided between the buffer tank 21 and the inner tank 23. A gas discharge port 22 is arranged on the buffer tank 21, and its function is to supplement gas to the high-pressure air chamber 24. A pressure gauge is installed between the buffer tank 21 and the water supply pipe 11 to monitor the change of the gas pressure inside the buffer tank 21 so as to adjust it in time.

[0038] When there is still some pressure after the high-lift water flow in the water supply pipe 11 passes through the water pressure buffer assembly 5, the water then flows into the buffer tank 21. The buffer tank 21 is connected in the water pump system. The stop valve is installed in the buffer tank 21, and a pressure gauge is installed at the connection between the buffer tank 21 and the water pump. The buffer tank 21 is of a pneumatic structure and maintains a certain air pressure inside. At this time, the air in the buffer tank 21 will be compressed due to the impact of the water pressure in the pipeline. However, because the air pressure in the buffer tank 21 is relatively high, the air flows in the reduced space, thereby reducing the impact force generated by the water hammer. The pressure gauge 25 can monitor the change in the gas pressure inside the buffer tank 21 so as to adjust it in a timely manner.

[0039] In addition, in order to prevent the water pump system from sucking the air in the buffer tank 21, the buffer tank 21 is also designed with a proper gas discharge port 22. When the air in the buffer tank 21 is adsorbed, the gas discharge port 22 can be opened to inject external air or nitrogen into the buffer tank 21 to maintain the air pressure stability in the buffer tank 21. At the same time, during the normal operation of the device, the gas discharge port 22 should also be kept closed to prevent the air in the buffer tank 21 from leaking and further prevent the water pump and the check valve 55 from being damaged.

[0040] When the valve closes, the water flow on the left stops supplying water. As a result, the water in the vertical pipe 1 impacts downward in the reverse direction, which will push the high-pressure airbag 31 downward. Then, the high-pressure airbag 31 will push the pressure towards the high-pressure air valve 32. At the same time, the connecting block 33 moves downward until the high-pressure airbag 31 is at the bend for protection. At this time, the gas flows into the water tank through the high-pressure air valve 32. At the same time, the connecting block 33 drives the first rack 41 downward through the telescopic rod, and then drives the second rack 42 upward through the gear 43. The first rack 41, the second rack 42, and the gear 43 are all slidably installed on the mounting frame, and then drive the connecting rod upward. When the connecting rod moves upward, it will drive the piston upward. The water in the water tank 54 flows into the water supply pipe 11, and the water flow direction is opposite to the high-lift water flow direction in the water supply pipe 11. When the water hammer ends, the water flow drives the high-pressure airbag 31 assembly 3 to return to its original position. The high-pressure airbag 31 drives the first rack 41 to move in the reverse direction through the connecting block 33, so that the gear 43 rotates in the reverse direction, driving the second rack 42 to move in the reverse direction, and the piston 53 moves downward. At the same time, the high-pressure air valve 32 opens, the head of the piston 53 moves away from the water tank 54, and the water in the water supply pipe 11 flows into the water tank 54.

Claims

1. A water hammer buffer protection device applicable to bent pipelines, characterized in that: It includes a pipeline component (1), an airbag component (3), a power component (4), and a water pressure buffer component (5). The airbag component (3) for moving within the pipeline component (1) is slidably installed within the pipeline component (1). The power component (4) is fixedly installed on the airbag component (3). The power component (4) is driven when the airbag component (3) is impacted by water pressure. When the airbag component (3) deforms and buffers under the water pressure impact, the power component drives the water pressure buffer component to convey water in the opposite direction of the water flow to offset the water hammer effect.

2. The water hammer buffer protection device applicable to a bent pipeline according to claim 1, characterized in that: The pipeline component (1) includes a water supply pipe (11) and a convex block (12). A chute (13) is provided on the inner wall of the water supply pipe (11). The airbag component (3) for sealing the water supply pipe (11) is slidably installed within the chute (13). The airbag component (3) is installed within the chute (13). The convex block (12) is fixedly connected to the inner wall of the water supply pipe (11).

3. The water hammer buffer protection device applicable to a bent pipeline according to claim 2, characterized in that: The airbag component (3) includes a high-pressure airbag (31), a high-pressure air valve (32), and a connection block (33). The connection block (33) is slidably connected to the water supply pipe (11). The high-pressure airbag (31) is fixedly connected to the connection block (33).

4. A water hammer buffer protection device applicable to a bent pipeline according to claim 1, characterized in that: The power component (4) includes a first rack (41), a second rack (42), a gear (43), a crank (44), a connecting rod (45), a slider (46), and a chute (47). The first rack (41) is fixedly connected to the connection block (33). The first rack (41) meshes with the gear (43). The second rack (42) meshes with the gear (43). The crank (44) is coaxially rotatably connected to the gear (43). One end of the crank (44) away from the gear (43) is rotatably connected to the connecting rod (45). One end of the connecting rod (45) away from the crank (44) is rotatably connected to the slider (46). The slider (46) is slidably connected to the chute (47).

5. The water hammer buffer protection device applicable to a bent pipeline according to claim 4, characterized in that: The lengths of the first rack (41) and the second rack (42) are between twice the circumference of the gear (43) and three times the circumference of the gear (43).

6. The water hammer buffer protection device applicable to a bent pipeline according to claim 5, characterized in that: The water pressure buffer component (5) includes a connecting rod (51), a connecting pipe (52), a piston (53), a water tank (54), a check valve (55), and a top plate (56). The connecting rod (51) is fixedly connected to the second rack (42). One end of the connecting rod (51) away from the second rack (42) is fixedly connected to the piston (53). A hole is provided on the water tank (54). The connecting rod (51) is in clearance fit with the hole. A limiting hole is provided below the water tank (54). The piston (53) is fixedly connected to one side of the top plate (56) for reducing the water loss in the water tank (54). The check valve (55) is fixedly connected to the other side of the top plate (56).

7. The water hammer buffer protection device applicable to a bent pipeline according to claim 6, characterized in that: An air pressure buffer assembly (2) is installed between the pipeline assembly (1) and the water pressure buffer assembly (5). The air pressure buffer assembly (2) includes a buffer tank (21), a gas discharge port (22), an inner tank (23), and a high-pressure gas chamber (24). The inner tank (23) is arranged inside the buffer tank (21). A high-pressure gas chamber (24) for buffering and shock absorption is formed between the buffer tank (21) and the inner tank (23). The gas discharge port (22) is arranged on the buffer tank (21).

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