Water hammer pressure reducing device

Abstract

The utility model discloses a water hammer pressure reducing device which comprises a bottom plate and a buffer tank installed above the bottom plate, the rear end of the buffer tank is fixedly connected with a liquid inlet pipe, the front end of the buffer tank is fixedly connected with a liquid outlet pipe, a buffer plate is elastically arranged on the inner wall of the buffer tank, a buffer pipe protruding upwards is arranged on the inner wall of the buffer tank, and the buffer plate is fixedly connected with the liquid outlet pipe. And a multi-stage pressure reduction assembly is arranged in the buffer pipe. According to the utility model, the impact of the water hammer is buffered in sequence through air compression in the air bag connected with the lower part of the sliding plate, compression of the second spring, flow control of the exhaust air flow by the one-way throttle valve, air compression in the buffer pipe and compression of the first spring, so that effective multi-stage pressure reduction is formed, and the buffer effect of the pressure reducing device is improved; the influence of the water hammer on a pipeline or equipment is reduced; the buffer plate is arranged in the buffer tank, so that the impact of fluid flowing back into the buffer tank from the liquid outlet pipe on the buffer plate under the unstable working condition is buffered, the buffer plate is pushed to rotate and extrude the torsional spring, and preliminary buffering on the water hammer is formed.

Description

TECHNICAL FIELD

[0001] The utility model relates to water pipeline technical field, especially relate to a water hammer pressure reducing device. BACKGROUND

[0002] When fluid suddenly stops or changes direction in the pipeline, due to the action of inertia, fluid will produce high-speed impact on the pipe wall, this phenomenon is called water hammer. In industrial and civil fluid conveying system, water hammer phenomenon is a common problem. Water hammer not only can cause pipe vibration, produce noise, but also can cause pipe rupture, equipment damage, and even cause the instability of system operation. For a long time, how to effectively prevent and mitigate the influence of water hammer has been a challenge in engineering and technical field.

[0003] The utility model discloses a water hammer buffer, including water hammer main part, water hammer main part be equipped with air cavity chamber and piston type inner push buffering subassembly in. In the using, first fill the air cavity chamber in water hammer main part with gas, and the piston type inner push buffering subassembly plays the sealing effect to gas, connects the pipe joint of connecting part and pipeline, when fluid impact due to pressure change, push the piston type inner push buffering subassembly inwards and produce thrust, at this moment, the gas in air cavity chamber produces an outward thrust to the piston type inner push buffering subassembly, reaches the effect of buffering and pressure reduction.

[0004] And the above existing water hammer buffer still has the following problems when using: the above-mentioned buffer only uses the compression of air in the air cavity to buffer the impact force of fluid, cannot achieve the effect of multi-stage pressure reduction, the buffering of water hammer effect is limited, and the unabsorbed water flow impact force will still cause damage to the inside of the pipeline. UTILITY MODEL CONTENTS

[0005] The utility model provides a water hammer pressure reducing device, and the purpose is to achieve the effect of multi-stage pressure reduction by setting the buffer plate on the inner wall of the buffer tank in cooperation with the pressure reducing assembly in the buffer pipe, so as to effectively prevent and mitigate the influence of water hammer.

[0006] The utility model provides following technical scheme: a water hammer pressure reducing device, including bottom plate and the buffer tank of installation above bottom plate, the rear end of buffer tank is fixed with liquid inlet pipe, and the front end of buffer tank is fixed with liquid outlet pipe, the inner wall of buffer tank is equipped with the buffer pipe of projecting upwards, be equipped with slide in buffer pipe, slide sliding installation is in the inside of buffer pipe, and slide and buffer pipe inside sealed contact, and the top surface of slide is fixed with first spring, and the top end of first spring is fixed in the inner wall top end of buffer pipe, the bottom surface of slide is fixed with air bag, be equipped with second spring in air bag, and the top end of second spring is fixed on the bottom surface of slide, and the inside bottom surface of air bag is fixed with second spring lower extreme, the top surface of slide is fixed with sliding tube, and the inside top end of sliding tube is fixed with the valve joint for connecting one-way throttle valve, and sliding tube passes through the inside of slide and air bag, and sliding tube upper end slidingly penetrates the top of buffer pipe.

[0007] Further, it further comprises a sliding block and a connecting rod, the sliding block is slidingly arranged on the bottom plate, the upper end of the connecting rod is rotatably connected with the buffer tank, and the lower end of the connecting rod is rotatably connected with the sliding block.

[0008] Further, it is further provided with a hydraulic rod corresponding to the sliding block, one end of the hydraulic rod is fixedly connected with the bottom plate, and the other end is connected with the sliding block.

[0009] Further, the inner wall of the buffer tank is fixed with a mounting seat corresponding to the rear side of the buffer pipe, and the mounting seat is elastically provided with a buffer plate.

[0010] Further, a torsion spring is connected between the mounting seat and the buffer plate.

[0011] Beneficial effects

[0012] Compared with the prior art, the utility model has the beneficial effects that:

[0013] The water hammer pressure reducing device, through the air compression in the air bag connected with the lower part of the slide, the compression of the second spring, the flow control of the one-way throttle valve to the exhaust airflow, the air compression in the buffer pipe and the compression of the first spring, buffers the impact of the water hammer together, forms effective multistage pressure reduction, improves the buffering effect of the pressure reducing device, and further reduces the influence of the water hammer effect on the pipeline or other equipment.

[0014] The water hammer pressure reducing device, by setting the buffer plate perpendicular to the fluid flow direction in the buffer tank, the impact of the fluid flowing back to the buffer tank from the liquid outlet pipe on the buffer plate in the non-steady state working condition is buffered, the buffer plate is pushed to rotate and extrude the torsion spring, and preliminary buffering of the water hammer is formed. BRIEF DESCRIPTION OF DRAWINGS

[0015] The utility model will be further explained in connection with the drawings and embodiments:

[0016] Figure 1 It is the whole structure schematic view of the utility model;

[0017] Figure 2 It is the inside section view schematic view of the utility model buffer tank;

[0018] Figure 3 It is the utility model Figure 2 A enlarged schematic view of middle A part.

[0019] Reference signs: 1, bottom plate;2, sliding groove;3, hydraulic rod;4, sliding block;5, connecting rod;6, buffer tank;7, rotating rod;8, liquid inlet pipe;9, liquid outlet pipe;10, buffer pipe;11, first spring;12, sliding plate;13, air bag;14, second spring;15, sliding pipe;16, valve interface;17, mounting seat;18, buffer plate. Specific implementation

[0020] This part will describe the specific embodiments of the utility model in detail, the preferred embodiment of the utility model is shown in the drawings, the role of the drawings is to supplement the description of the text part with graphics, so that people can intuitively and visually understand each technical feature and the overall technical scheme of the utility model, but it cannot be understood as the limitation of the protection scope of the utility model.

[0021] Please refer to Figures 1-3 The utility model provides a technical scheme: a water hammer pressure reducing device, including bottom plate 1 and the buffer tank 6 of oblique installation above bottom plate 1, the front side of buffer tank 6 is higher than rear side, the rear end of buffer tank 6 is fixedly connected with liquid inlet pipe 8, and the front end of buffer tank 6 is fixedly connected with liquid outlet pipe 9. The water hammer pressure reducing device further includes sliding block 4 slidingly arranged on the top surface of bottom plate 1, and the top surface of bottom plate 1 is provided with sliding groove 2 at the position corresponding to sliding block 4, and sliding block 4 is slidingly installed in the inside of sliding groove 2. The front end of sliding block 4 is connected with drive assembly, the drive assembly includes two hydraulic rods 3 arranged side by side, the telescopic end of hydraulic rod 3 is connected with sliding block 4, and the other end of hydraulic rod 3 is fixedly connected with bottom plate 1.

[0022] Rotatingly installed between the buffer tank 6 and sliding block 4 is connecting rod 5. One end of connecting rod 5 is rotatably connected with buffer tank 6, and the other end is rotatably connected with sliding block 4. The top surface of bottom plate 1 is fixedly provided with rotating rod 7, the upper end of rotating rod 7 is rotatably connected with the bottom surface of buffer tank 6, and the length of connecting rod 5 is greater than the length of rotating rod 7.

[0023] The inner wall of the buffer tank 6 is provided with an upwardly protruding buffer pipe 10, and the inner wall is provided with a buffer port corresponding to the position of the buffer pipe 10. The inside of the buffer pipe 10 is provided with a sliding plate 12 which is slidingly installed in the inside of the buffer pipe 10 and is in sealing contact with the buffer pipe 10. The top surface of the sliding plate 12 is fixedly connected with a first spring 11, and the upper end of the first spring 11 is fixedly connected with the top end of the inner wall of the buffer pipe 10.

[0024] The bottom surface of the sliding plate 12 is fixedly connected with an air bag 13, and the inside of the air bag 13 is provided with a second spring 14, the upper end of which is fixedly connected with the bottom surface of the sliding plate 12, and the lower end of which is fixedly connected with the inside bottom surface of the air bag 13. The top surface of the sliding plate 12 is fixedly installed with a sliding pipe 15 which is in communication with the inside of the air bag 13, and the upper end of the sliding pipe 15 slidingly penetrates the top of the buffer pipe 10. The inside top end of the sliding pipe 15 is fixedly connected with a valve interface 16 for connecting a one-way throttle valve. The one-way throttle valve can ensure the normal supply of air flow when the sliding pipe 15 inhales air, and when the sliding pipe 15 discharges gas, the gas will pass through the throttle valve to limit the flow rate of the gas, so as to adjust the stability of the air flow and reduce the pressure fluctuation of the system.

[0025] The rear side of the buffer pipe 10 on the inner wall of the buffer tank 6 is fixedly provided with a mounting seat 17, and the mounting seat 17 is elastically provided with a buffer plate 18, and a torsional spring is fixedly connected between the mounting seat 17 and the buffer plate 18.

[0026] Working principle:

[0027] In use, the extension length of the hydraulic rod 3 is adjusted according to the site conditions, so that the sliding block 4 is driven by the hydraulic rod 3 to slide in the sliding groove 2, so that the inclination of the connecting rod 5 changes, so as to adjust the inclination of the buffer tank 6.

[0028] Then the liquid inlet pipe 8 and the liquid outlet pipe 9 are connected into the corresponding pipelines respectively, when the fluid is normally transported, the fluid enters the buffer tank 6 through the liquid inlet pipe 8 and then directly flows out through the liquid outlet pipe 9.

[0029] When the non-steady state condition occurs, the fluid flows back into the buffer tank 6 from the liquid outlet pipe 9, and impacts the buffer plate 18, which drives the buffer plate 18 to rotate and deforms the torsional spring, thereby forming a preliminary buffer for water hammer.

[0030] The buffer plate 18 blocks the transient water pressure to the buffer pipe 10, and the water pressure first impacts the air bag 13. The air bag 13 is impacted first to overcome the second spring 14 and be compressed. When the air bag 13 is compressed to a certain extent, the one-way throttle valve is opened under pressure to discharge the gas slowly, so that the gas in the air bag 13 flows out slowly through the sliding pipe 15. During this period, the water pressure needs to overcome the second spring 14, the air pressure in the air bag 13 and the control of the air flow velocity by the one-way throttle valve in turn, thereby effectively buffering the impact of the liquid.

[0031] At the same time, the impact force is applied to the slide plate 12 through the air bag 13, the slide plate 12 slides upward against the elastic force of the first spring 11, so that the slide plate 12 compresses the air in the buffer tube 10, and as the air pressure of the buffer tube 10 increases, the further impact on the liquid is buffered, the buffering effect of the pressure reducing device is effectively improved, so that the damage caused by the water hammer effect to the pipeline or other equipment is avoided. In the process, the sliding tube 15 slides upward with the slide plate 12 and extends to the outside of the buffer tube 10 and is not blocked by the buffer tube 10.

[0032] When the state of the liquid in the pipeline tends to be stable, the impact force of the liquid on the air bag 13 decreases, the pre-tightening force of the second spring 14 is released, and the air bag 13 is pushed to move, so as to reduce the suction of the air outside by the pressure inside the air bag 13, and the air outside enters the air bag 13 through the one-way throttle valve, and then the air bag 13 returns to the original state, and the buffering effect is ensured.

[0033] The embodiments of the utility model are described in detail in combination with the drawings above, but the utility model is not limited to the above-mentioned embodiments, and various changes can be made within the knowledge range possessed by ordinary skilled in the art without departing from the purpose of the utility model.

Claims

1. A water hammer pressure reducing device, comprising a base plate (1) and a buffer tank (6) mounted above the base plate (1), wherein a liquid inlet pipe (8) is fixedly connected to the rear end of the buffer tank (6), and a liquid outlet pipe (9) is fixedly connected to the front end of the buffer tank (6), characterized in that: The inner wall of the buffer tank (6) is provided with a buffer tube (10) protruding upward, and a slide plate (12) is provided in the buffer tube (10). The slide plate (12) is slidably mounted inside the buffer tube (10), and the slide plate (12) is in sealed contact with the inside of the buffer tube (10). The top surface of the slide plate (12) is fixedly connected to a first spring (11), and the upper end of the first spring (11) is fixedly connected to the top end of the inner wall of the buffer tube (10); the bottom surface of the slide plate (12) is fixedly connected to an air bag (13), and the air bag (13) is provided with a A second spring (14) is provided, the upper end of the second spring (14) is fixed to the bottom surface of the slide plate (12), and the lower end of the second spring (14) is fixedly connected to the inner bottom surface of the airbag (13); a sliding tube (15) is fixedly connected to the top surface of the slide plate (12), and a valve interface (16) for connecting a one-way throttle valve is fixedly connected to the inner top of the sliding tube (15); the sliding tube (15) passes through the slide plate (12) and communicates with the interior of the airbag (13), and the upper end of the sliding tube (15) slides through the top of the buffer tube (10).

2. The water hammer pressure reducing device according to claim 1, wherein: The device further comprises a slider (4) and a connecting rod (5), wherein the slider (4) is slidably arranged on the base plate (1), the upper end of the connecting rod (5) is rotatably connected to the buffer tank (6), and the lower end of the connecting rod (5) is rotatably connected to the slider (4); a rotating rod (7) is fixedly mounted on the base plate (1), and the upper end of the rotating rod (7) is rotatably connected to the buffer tank (6).

3. The water hammer pressure reducing device according to claim 2, wherein: A hydraulic rod (3) corresponding one-to-one to the slider (4) is also provided, one end of the hydraulic rod (3) being fixedly connected to the bottom plate (1) and the other end being connected to the slider (4).

4. The water hammer pressure reducing device according to claim 1, wherein: A mounting seat (17) is fixed to the inner wall of the buffer tank (6) corresponding to the rear side of the buffer tube (10), and a buffer plate (18) is elastically provided on the mounting seat (17).

5. The water hammer pressure reducing device according to claim 4, wherein: A torsion spring is connected between the mounting seat (17) and the buffer plate (18).

Images