Device for eliminating positive water hammer effect of pipeline

Abstract

The utility model relates to the technical field of mining machinery, in particular to a device for eliminating a pipeline positive water hammer effect, which comprises a main water inlet pipe, a pump body and a check valve, a water inlet end of the pump body is connected with a first pipeline, the check valve is mounted on the first pipeline, and a buffer energy consumption mechanism is connected between the first pipeline and the main water inlet pipe. A branch pipeline is connected to the pipe wall of the side, close to the buffering energy dissipation mechanism, of the main water inlet pipe, a self-operated regulating valve is arranged on the branch pipeline, a barren liquor pool is arranged at the tail end of the branch pipeline, and the tail end of the branch pipeline is connected with the barren liquor pool. According to the utility model, the damage of the positive water hammer effect to the pump body, the valve and the pipeline can be effectively overcome, the use safety is improved, and safety accidents caused by leakage of toxic media are avoided.

Description

Technical Field

[0001] This utility model relates to the field of mining machinery technology, specifically to a device for eliminating the positive water hammer effect in pipelines. Background Technology

[0002] When the water pump stops due to power failure, the valves in the pumping system close abruptly, causing a water hammer effect. When a valve suddenly closes or the pump stops working, the water flow continues forward due to inertia, exerting pressure on the valve or pipe wall. Because the inner wall of the pipe is smooth, the water flow quickly reaches maximum pressure under inertia, forming a positive water hammer. Conversely, a sudden opening of a closed valve or the start of a pump will generate a negative water hammer, but its destructive force is smaller.

[0003] Positive water hammer is extremely destructive; excessive pressure can cause pipe rupture and damage valves and fixtures. Furthermore, the medium in pipelines used in mining production is a cyanide-containing solution, a toxic medium. Pipeline leaks caused by positive water hammer can lead to accidents. To ensure that the pressure inside the pipeline remains stable after shutdown and does not exceed the pipeline's pressure rating, thus preventing accidents, it is necessary to develop devices to eliminate the positive water hammer effect. Summary of the Invention

[0004] In order to solve the problems of the prior art described in the background section, the present invention discloses a device for eliminating the positive water hammer effect in pipelines.

[0005] To achieve the above objectives, the technical solution of this invention is as follows:

[0006] A device for eliminating positive water hammer effect in pipelines includes a main inlet pipe, a pump body, and a check valve. The inlet end of the pump body is connected to a first pipe, on which the check valve is installed. A buffer energy dissipation mechanism is connected between the first pipe and the main inlet pipe. A branch pipe is connected to the pipe wall of the main inlet pipe near the buffer energy dissipation mechanism. A self-regulating valve is installed on the branch pipe. A lean liquid tank is provided at the end of the branch pipe, and the end of the branch pipe is connected to the lean liquid tank.

[0007] Preferably, the buffer energy dissipation mechanism includes a second pipe, the two ends of which are respectively connected to the first pipe and the main pipe by flange sealing and fixing, and the second pipe is provided with multiple sets of buffer energy dissipation components.

[0008] Preferably, multiple sets of buffer energy dissipation components are evenly distributed around the axis of the second pipe on the inner wall of the second pipe. The buffer energy dissipation components include fixed plates that are disposed opposite to each other at both ends of the inner wall of the second pipe, and two sliding rods that are fixedly connected between the opposite ends of the two fixed plates and are parallel to each other. Multiple V-shaped plates are connected in series on the sliding rods, and the V-shaped plates are elastically connected to the sliding rods.

[0009] Preferably, the V-shaped plate is made of elastic metal material, and the bottom sides of the two free ends of the V-shaped plate are respectively provided with a first strip hole. The slide rod passes through the first strip hole and is slidably connected to the side wall of the first strip hole. The length of the first strip hole is greater than the outer diameter of the slide rod, and the width matches the outer diameter of the slide rod. The elasticity of the V-shaped plate satisfies that: when the pump body is not turned off, the bottom ends of adjacent V-shaped plates abut against each other.

[0010] Preferably, the V-shaped plate is made of two rectangular steel plates, with the top ends of the two rectangular steel plates hinged together. A second strip-shaped hole is provided on each side of the bottom of the two rectangular steel plates. The sliding rod passes through the second strip-shaped hole and is slidably connected to the side wall of the second strip-shaped hole. The length of the second strip-shaped hole is greater than the outer diameter of the sliding rod, and the width matches the outer diameter of the sliding rod. A first energy-dissipating spring is sleeved on the sliding rod located on the inner side of the V-shaped plate. A second energy-dissipating spring is sleeved on the sliding rod between adjacent rectangular steel plates. A third energy-dissipating spring is sleeved on the sliding rod between a rectangular steel plate and an adjacent fixed plate. The elastic combination of the first, second, and third energy-dissipating springs satisfies the following condition: when the pump body is not turned off, each rectangular steel plate maintains contact with the adjacent first, second, or third energy-dissipating spring.

[0011] Preferably, the stiffness of the first energy-dissipating spring, the second energy-dissipating spring, and the third energy-dissipating spring gradually increases.

[0012] Preferably, the pump body is a double-suction centrifugal pump.

[0013] Preferably, the main water inlet pipe is a DN250 carbon steel pipe with a pressure limit of 2.5MPa.

[0014] Preferably, the branch pipe is a DN100 carbon steel pipe with a pressure limit of 1.6MPa.

[0015] The beneficial effects of this novel device for eliminating positive water hammer in pipelines are as follows:

[0016] This new invention can effectively overcome the damage to pump bodies, valves and pipelines caused by positive water hammer, improve the safety of use, and avoid safety accidents caused by leakage of toxic media. Attached Figure Description

[0017] Figure 1 : A top view of the overall structure of this novel invention;

[0018] Figure 2 : A cross-sectional schematic diagram of the new type of buffer energy dissipation mechanism;

[0019] Figure 3 : A partial structural schematic diagram of this novel buffer energy dissipation component;

[0020] Figure 4: Schematic diagram of the structural principle of this novel buffer energy dissipation component.

[0021] 1: Pump body, 2: Check valve, 3: Second pipe, 4: Main inlet pipe, 5: Branch pipe, 6: Self-regulating valve, 7: Lean liquid tank, 8: Flange, 9: First pipe, 10: Buffer energy dissipation component, 101: Fixing plate, 102: Slide rod, 103: V-shaped plate, 1031: Second strip hole, 104: Second energy dissipation spring, 105: Third energy dissipation spring, 106: First energy dissipation spring. Detailed Implementation

[0022] The following description is merely a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

[0023] Example 1

[0024] A device for eliminating the positive water hammer effect in pipelines, such as Figure 1-4 As shown, it includes a main inlet pipe 4, a pump body 1, and a check valve 2. The inlet end of the pump body 1 is connected to a first pipe 9, and the check valve 2 is installed on the first pipe 9. A buffer energy dissipation mechanism is connected between the first pipe 9 and the main inlet pipe 4. A branch pipe 5 is connected to the pipe wall of the main inlet pipe 4 near the buffer energy dissipation mechanism. A self-regulating valve 6 is installed on the branch pipe 5. A lean liquid tank 7 is provided at the end of the branch pipe 5, and the end of the branch pipe 5 is connected to the lean liquid tank 7.

[0025] Furthermore, such as Figure 1-4 As shown, the buffer energy dissipation mechanism includes a second pipe 3, the two ends of which are respectively sealed and fixedly connected to the first pipe 9 and the main pipe 4 through flanges 8. The second pipe 8 is provided with multiple sets of buffer energy dissipation components 10.

[0026] Furthermore, such as Figure 1-4 As shown, multiple sets of buffer energy dissipation components 10 are evenly distributed on the inner wall of the second pipe 3 around the axis of the second pipe 3. Each buffer energy dissipation component 10 includes a fixed plate 101 disposed opposite to both ends of the inner wall of the second pipe 3, and two sliding rods 102 fixedly connected between the opposite ends of the two fixed plates 101 and parallel to each other. Multiple V-shaped plates 103 are connected in series on the sliding rods 102, and the V-shaped plates 103 are elastically connected to the sliding rods 102.

[0027] Example 2

[0028] Based on Example 1, refer to Figure 1-4As shown, the V-shaped plate 103 is made of elastic metal material (folded into a V shape). The bottom sides of the two free ends of the V-shaped plate are respectively provided with a first strip hole (the shape of which is similar to that of the second strip hole). The slide rod 102 passes through the first strip hole and is slidably connected to the side wall of the first strip hole. The length of the first strip hole is greater than the outer diameter of the slide rod 102, and the width matches the outer diameter of the slide rod 102. The elasticity of the V-shaped plate 103 satisfies the condition that the bottom ends of adjacent V-shaped plates abut against each other when the pump body is not turned off.

[0029] When the pump is shut down, the water in the main inlet pipe flows towards the check valve due to inertia, creating a significant increase in water pressure. At this time, the water flow impacts the V-shaped plates, and several of the V-shaped plates undergo elastic deformation, thus absorbing the impact force of the water flow and preventing excessive impact force from damaging the check valve and the pump body. The change in the included angle of the V-shaped plates causes a change in the contact position between the first slot and the slide rod. The first slot is designed to provide clearance, and the mechanism of the second slot described below is the same.

[0030] Example 3

[0031] Based on Example 1, such as Figure 1-4 As shown, the V-shaped plate 103 is made of two rectangular steel plates, with the top ends of the two rectangular steel plates hinged together. A second strip-shaped hole 1031 is provided on both sides of the bottom of the two rectangular steel plates. The sliding rod 102 passes through the second strip-shaped hole 1031 and is slidably connected to the side wall of the second strip-shaped hole 1031. The length of the second strip-shaped hole 1031 is greater than the outer diameter of the sliding rod 102, and its width matches the outer diameter of the sliding rod 102. A first energy-dissipating spring 106 is sleeved on the sliding rod 102 located on the inner side of the V-shaped plate 103. A second energy-dissipating spring 104 is sleeved on the sliding rod 102 between adjacent rectangular steel plates. A third energy-dissipating spring 105 is sleeved on the sliding rod 102 between the rectangular steel plate and the adjacent fixed plate 101. The elastic combination of the first energy-dissipating spring 106, the second energy-dissipating spring 104, and the third energy-dissipating spring 105 satisfies the following condition: when the pump body is not turned off, each rectangular steel plate maintains contact with the adjacent first energy-dissipating spring, second energy-dissipating spring, or third energy-dissipating spring.

[0032] Furthermore, such as Figure 1-4 As shown, the stiffness of the first energy-dissipating spring 106, the second energy-dissipating spring 104, and the third energy-dissipating spring 105 gradually increases.

[0033] This embodiment provides another implementation of the V-shaped plate 103. When the pump is turned off, the water flow in the main inlet pipe generates high water pressure and an impact force towards one side of the pump due to inertia. The rectangular steel plate buffers the impact force of the water flow during its back-and-forth movement, preventing excessive impact force from damaging the check valve and the pump. Since the stiffness of the first energy-dissipating spring 106, the second energy-dissipating spring 104, and the third energy-dissipating spring 105 gradually increases, this new invention can improve the buffering energy dissipation effect in stages according to the impact force of the water flow. That is, firstly, the first energy-dissipating spring compresses to dissipate energy, then the second energy-dissipating spring compresses to dissipate energy, and finally the third energy-dissipating spring compresses to dissipate energy. Through the above settings, the instantaneous huge impact force of the water flow is buffered into a smaller impact force.

[0034] Example 4

[0035] like Figure 1-4 As shown, the pump body is a double-suction centrifugal pump.

[0036] like Figure 1 As shown, the main water inlet pipe is a DN250 carbon steel pipe with a pressure limit of 2.5MPa.

[0037] like Figure 1 As shown, the branch pipe is a DN100 carbon steel pipe with a pressure limit of 1.6MPa.

[0038] In this embodiment, by combining the above-mentioned settings with the self-regulating valve 6, a pressure value can be set during use. When the water pressure exceeds a certain value, the self-regulating valve 6 opens, discharging a portion of the water into the lean liquid tank. This ensures the structural safety of the entire pipeline system.

Claims

1. A device for eliminating the positive water hammer effect in a pipe, characterized in that: The application relates to a pump body and a water inlet pipe, and belongs to the field of water supply equipment.

2. A device for eliminating the positive water hammer effect in a pipeline as claimed in claim 1, characterized in that: The buffer energy consumption mechanism comprises a second pipe, two ends of the second pipe are respectively fixedly connected with the first pipe and the main pipe through flanges, and a plurality of buffer energy consumption assemblies are arranged in the second pipe.

3. The device for eliminating the positive water hammer effect of the pipeline according to claim 2, wherein the plurality of buffer energy consumption assemblies are uniformly distributed on the inner wall of the second pipe along the axis of the second pipe, the buffer energy consumption assembly comprises two fixed plates arranged at two ends of the inner wall of the second pipe, two sliding rods fixedly connected between the opposite ends of the two fixed plates and parallel to each other, a plurality of V-shaped plates are connected in series on the sliding rods, and the V-shaped plates are elastically connected with the sliding rods.

4. A device for eliminating the positive water hammer effect in a pipeline as claimed in claim 3, characterized in that: The V-shaped plate is made of elastic metal material, two first strip holes are arranged at the bottom of two free ends of the V-shaped plate, the sliding rods pass through the first strip holes and are slidably connected with the side walls of the first strip holes, the length of the first strip hole is greater than the outer diameter of the sliding rod, and the width of the first strip hole matches the outer diameter of the sliding rod, and the elasticity of the V-shaped plate satisfies that, in the case that the pump body is not shut down, the bottom ends of adjacent V-shaped plates abut against each other.

5. A device for eliminating the positive water hammer effect in a pipeline as defined in claim 3, characterized in that: The V-shaped plate is made of two rectangular steel plates, the top ends of the two rectangular steel plates are hingedly connected, two second strip holes are arranged at the bottom of the two rectangular steel plates, the sliding rods pass through the second strip holes and are slidably connected with the side walls of the second strip holes, the length of the second strip hole is greater than the outer diameter of the sliding rod, and the width of the second strip hole matches the outer diameter of the sliding rod, a first energy consumption spring is arranged on the sliding rod on the inner side of the V-shaped plate, a second energy consumption spring is arranged on the sliding rod between adjacent rectangular steel plates, and a third energy consumption spring is arranged on the sliding rod between the rectangular steel plate and the adjacent fixed plate, and the elasticity combination of the first energy consumption spring, the second energy consumption spring and the third energy consumption spring satisfies that, in the case that the pump body is not shut down, each rectangular steel plate keeps in contact with the adjacent first energy consumption spring, second energy consumption spring or third energy consumption spring.

6. A device for eliminating the positive water hammer effect in a pipeline as claimed in claim 5, characterized in that: The stiffness of the first energy consumption spring, the second energy consumption spring and the third energy consumption spring gradually increases.

7. A device for eliminating the positive water hammer effect in a pipeline as claimed in claim 6, characterized in that: The pump body is a double-suction centrifugal pump.

8. A device for eliminating the positive water hammer effect in a pipeline as claimed in claim 7, characterized in that: The main water inlet pipe is a DN250 carbon steel pipe, and the bearing pressure limit is 2.5 MPa.

9. A device for eliminating the positive water hammer effect in a pipeline as claimed in claim 8, characterized in that: The branch pipe is a DN100 carbon steel pipe, and the bearing pressure limit is 1.6 MPa.

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