Water hammer eliminator

Abstract

The utility model provides a kind of water hammer eliminator, including outer cylinder, compression spring and buffer plate;The lower end of outer cylinder is provided with the inlet for the water flow in pipeline to rush in;Compression spring is vertically arranged in outer cylinder, buffer plate is transversely arranged in outer cylinder and is connected with the lower end of compression spring, the length direction both ends of buffer plate are connected with pulley, pulley and outer cylinder inner wall sliding fit;Buffer plate is vertically reciprocated in outer cylinder by the elastic deformation of compression spring;It is more convenient to use, and service life is longer.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic technology, and more specifically, to a water hammer eliminator. Background Technology

[0002] Water hammer refers to the phenomenon in water pipes where the inner wall is smooth and water flows freely. When an open valve is suddenly closed, the water flow exerts pressure on the valve and pipe wall, primarily on the valve itself. Due to the smooth pipe wall, the subsequent water flow, under the influence of inertia, quickly reaches its maximum, causing damage. This is the "water hammer effect" in hydraulics, also known as positive water hammer. This factor must be considered in the construction of water pipelines. Conversely, a closed valve, when suddenly opened, will also generate water hammer, called negative water hammer. It also has some destructive force, but it is not as great as the former. The force generated by the back-and-forth shock wave of the water flow can easily damage valves and water pumps.

[0003] The existing water hammer eliminator has a sealed air chamber inside, with a piston at the lower end. When the water hammer wave enters the water hammer eliminator, the water hammer wave acts on the piston, and the piston will move towards the air chamber, forming a dynamic balance, thus effectively eliminating irregular water hammer wave oscillations.

[0004] Pistons are prone to hardening and cracking under long-term pressure, which affects air tightness, and the air chamber needs to maintain the initial air pressure, making it inconvenient to use. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a water hammer eliminator that is more convenient to use and has a longer service life.

[0006] This utility model provides a water hammer eliminator, including an outer cylinder, a compression spring, and a buffer plate; the lower end of the outer cylinder has a flushing inlet for water to flow into the pipe; the compression spring is vertically arranged in the outer cylinder, the buffer plate is horizontally arranged in the outer cylinder and connected to the lower end of the compression spring, and pulleys are connected to both ends of the buffer plate along its length, the pulleys slidingly engaging with the inner wall of the outer cylinder; the buffer plate reciprocates vertically within the outer cylinder due to the elastic deformation of the compression spring.

[0007] Compared with existing technologies, the above-mentioned technical solution can act on the buffer plate when water hammer occurs, causing the compression spring to contract under force, thereby causing the pulley to slide along the inner wall of the outer cylinder to eliminate water hammer. The pulley can limit the lateral displacement of the buffer plate when it is under force, causing uneven force distribution and effectively eliminating water hammer. Compared with the piston type, it also has a longer service life.

[0008] In one possible implementation, it further includes an inner cylinder coaxially disposed within the outer cylinder; a compression spring is vertically disposed within the inner cylinder, and a buffer plate is horizontally disposed within the inner cylinder and connected to the lower end of the compression spring; a vertically extending slide rail is provided on the side wall of the inner cylinder, and a pulley slides in cooperation with the inner wall of the outer cylinder through the slide rail.

[0009] Compared with existing technologies, the above technical solution makes the compression spring easier to radially limit, less prone to lateral movement that would reduce buffering performance, and the slide rail does not affect the use of the pulley.

[0010] In one possible implementation, a water storage cavity is formed between the inner peripheral wall of the outer cylinder and the outer peripheral wall of the inner cylinder; multiple water outlet channels communicating with the water storage cavity are opened in the circumferential direction on the lower end face of the outer cylinder, and each water outlet channel is connected to a one-way valve.

[0011] Compared with the existing technology, the above technical solution allows water to seep into the water storage chamber through the slide rail. When the water flow is calm, the water remaining in the water storage chamber will flow back into the water pipe through the water outlet.

[0012] In one possible implementation, the compression spring jacket is provided with a waterproof rubber sealing sleeve.

[0013] Compared with existing technologies, the above technical solution can prevent water from seeping into the compression spring, which would cause corrosion and performance degradation, and increase its service life.

[0014] In one possible implementation, a support pad is also included, which is disposed on the upper end face of the outer cylinder and abuts against the inner bottom wall of the top of the outer cylinder.

[0015] Compared with existing technologies, the above-mentioned technical solution can effectively cope with strong water hammer, form a buffer, and increase service life.

[0016] In one possible implementation, an air outlet pipe is provided at the upper end of the inner cylinder. One end of the air outlet pipe is connected to the inner cylinder, and the other end passes through the support pad and the outer cylinder in sequence to connect with the outside atmosphere.

[0017] Compared with existing technologies, the above technical solution can enable the compression spring to effectively contract and return to its original position.

[0018] In one possible implementation, the frictional force on the inner peripheral wall of the outer cylinder gradually increases from bottom to top.

[0019] Compared with existing technologies, the above-mentioned technical solution can effectively cope with water hammer of varying strengths.

[0020] In one possible implementation, the support pad is made of polyurethane.

[0021] Compared with existing technologies, the above-mentioned technical solution is highly elastic, wear-resistant, and has strong processability, which can effectively provide support and cushioning.

[0022] In one possible implementation, the buffer plate is made of polyketone resin.

[0023] Compared with existing technologies, the above-mentioned technical solution is water-resistant, not easily corroded or deformed, and has a long service life. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the present application;

[0025] Figure 2 This is a partial sectional perspective view of this application;

[0026] Explanation of reference numerals in the attached figures:

[0027] 1-Outer cylinder, 1.1-Flange, 2-Compression spring, 3-Buffer plate, 4-Inner cylinder, 5-Water storage chamber, 6-Support pad, 7-Fixing component, 11-Pump inlet, 12-Water outlet channel, 13-One-way valve, 21-Waterproof rubber sleeve, 31-Pulley, 41-Slide rail, 100-External water pipe, 101-Water flow. Detailed Implementation

[0028] First, those skilled in the art should understand that these embodiments are merely used to explain the technical principles of the embodiments of this application and are not intended to limit the scope of protection of the embodiments of this application. Those skilled in the art can make adjustments as needed to adapt to specific application scenarios.

[0029] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application based on the specific circumstances.

[0030] In the embodiments of this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0031] The present application will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0032] As attached Figure 1 and attached Figure 2As shown, this embodiment discloses a water hammer eliminator, including an outer cylinder 1, a compression spring 2, and a buffer plate 3; the lower end of the outer cylinder 1 has a flushing inlet 11 for water to flow into the pipe; the compression spring 2 is vertically arranged in the outer cylinder 1, the buffer plate 3 is horizontally arranged in the outer cylinder 1 and connected to the lower end of the compression spring 2, and pulleys 31 are connected to both ends of the buffer plate 3 along its length, the pulleys 31 slidingly engaging with the inner wall of the outer cylinder 1; the buffer plate 3 reciprocates vertically within the outer cylinder 1 due to the elastic deformation of the compression spring 2; it also includes an inner cylinder 4 coaxially arranged within the outer cylinder 1; a flange 1.1 is formed on the inner peripheral wall of the flushing inlet 11 on the outer cylinder 1, the inner cylinder 4 is fixed on the flange 1.1, the compression spring 2 is vertically arranged in the inner cylinder 4, the buffer plate 3 is horizontally arranged in the inner cylinder 4 and connected to the lower end of the compression spring 2; a vertically extending slide rail 41 is provided on the side wall of the inner cylinder 4, and the pulleys 31 slidely engaging with the inner wall of the outer cylinder 1 through the slide rail 41.

[0033] Specifically, in this embodiment, those skilled in the art can use existing technology, such as fasteners 7 or bolts, to install one end of the outer cylinder 1 at the inlet 11 to the part of the external water pipe 100 that is prone to water hammer effect; the bottom of the inner cylinder 4 is fixed to the flange 1.1; the slide rail 41 passes through the inner and outer sides of the side wall of the inner cylinder 4; the buffer plate 3 has wheel and axle structures fixed at both ends in the length direction, and is fixedly connected to the pulley 31 through the wheel and axle structures, and the wheel and axle slide in cooperation with the slide rail 41; when water hammer occurs, the water hammer acts on the buffer plate 3, causing the compression spring 2 to contract under force, so that the pulley 31 slides along the inner wall of the outer cylinder 1 to eliminate water hammer. The pulley 31 restricts the lateral displacement of the buffer plate 3 when under force, so that uneven force does not require air pressure adjustment, making it more convenient to use and longer in service life compared to the piston type.

[0034] As attached Figure 1 As shown, in some embodiments, a water storage cavity 5 is formed between the inner peripheral wall of the outer cylinder 1 and the outer peripheral wall of the inner cylinder 4; a plurality of water outlet channels 12 communicating with the water storage cavity 5 are provided on the flange 1.1, and a one-way valve 13 is connected to each water outlet channel 12. The best installation method in this embodiment is vertical installation, and the one-way valve 13 is always in the open state. Due to the presence of the slide rail 41, water may seep into or remain in the water storage cavity 5 through the slide rail 41. When the water flow is calm, the water remaining in the water storage cavity 5 will flow back to the external water pipe 100 through the water outlet channel 12 due to gravity, while the water flow in the water pipe 100 cannot enter the water storage cavity 5.

[0035] As attached Figure 1As shown, in some embodiments, the compression spring 2 is covered with a waterproof rubber sealing sleeve 21. The waterproof rubber sealing sleeve 21 can prevent water from seeping into the compression spring 2, causing corrosion of the compression spring 2 and resulting in performance degradation, thus extending its service life; the waterproof rubber sealing sleeve 21 covers the outer periphery of the compression spring 2, and its upper end is sealed to the inner bottom wall of the upper end of the inner cylinder 4, and its lower end is sealed to the upper surface of the buffer plate 3.

[0036] As attached Figure 1 As shown, in some embodiments, a support pad 6 is also included. The support pad 6 is disposed on the upper end face of the outer cylinder 1, and the upper end face of the support pad 6 abuts against the inner bottom wall of the top of the outer cylinder 1. The support pad 6 can effectively cope with strong water hammer, forming a buffer and increasing the service life of the inner cylinder 4 and the outer cylinder 1.

[0037] As attached Figure 1 As shown, in some embodiments, an air outlet pipe 42 is provided at the upper end of the inner cylinder 4. One end of the air outlet pipe 42 is connected to the inside of the inner cylinder 4, and the other end passes through the support pad 6 and the outer cylinder 1 in sequence to connect with the outside atmosphere. This allows the air inside the compression spring 2, which is wrapped by the waterproof rubber sealing sleeve 21, to be effectively discharged, so that the compression spring 2 can contract and return to its normal position.

[0038] In some embodiments, the frictional force on the inner peripheral wall of the outer cylinder 1 gradually increases from bottom to top. Different frictional particles can be sequentially arranged on the inner peripheral wall surface of the outer cylinder 1 from bottom to top, causing the frictional force to gradually increase from bottom to top. This also gradually increases the rolling resistance of the pulley 31, allowing it to cope with water hammer of varying forces while keeping the elastic coefficient of the compression spring 2 constant. Even when encountering a strong water hammer, it can effectively achieve balance.

[0039] In some embodiments, the support pad 6 is made of polyurethane. It is highly elastic, wear-resistant, and easily processable, providing effective support and cushioning.

[0040] In some embodiments, the buffer plate 3 is made of polyketone resin. Polyketone resin is water-resistant, not easily corroded or deformed, and has a long service life.

[0041] In the description of the embodiments of this application, it should be noted that the terms "inner" and "outer" and other terms indicating direction or positional relationship are based on the direction or positional relationship shown in the drawings. This is only for the convenience of description and does not indicate or imply that the device or component must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this application.

[0042] In the description of this application, the references to terms such as "an embodiment," "some embodiments," "in this embodiment," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0043] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A water hammer eliminator, characterized in that, It includes an outer cylinder (1), a compression spring (2), and a buffer plate (3); the lower end of the outer cylinder (1) is provided with a flushing inlet (11) for water to flow into the pipe; the compression spring (2) is vertically arranged in the outer cylinder (1), the buffer plate (3) is horizontally arranged in the outer cylinder (1) and connected to the lower end of the compression spring (2), and the buffer plate (3) is connected to pulleys (31) at both ends in the length direction, and the pulleys (31) slide in cooperation with the inner wall of the outer cylinder (1); the buffer plate (3) reciprocates vertically in the outer cylinder (1) by the elastic deformation of the compression spring (2).

2. A water hammer eliminator according to claim 1, characterized in that, It also includes an inner cylinder (4) coaxially disposed inside the outer cylinder (1); a flange (1.1) is provided on the inner peripheral wall of the outer cylinder (1) at the inlet (11), and the inner cylinder (4) is fixed on the flange (1.1); the compression spring (2) is vertically disposed in the inner cylinder (4), and the buffer plate (3) is horizontally disposed in the inner cylinder (4) and connected to the lower end of the compression spring (2); a vertically extending slide rail (41) is provided on the side wall of the inner cylinder (4), and the pulley (31) slides with the inner wall of the outer cylinder (1) through the slide rail (41).

3. A water hammer eliminator according to claim 2, characterized in that, A water storage cavity (5) is formed between the inner peripheral wall of the outer cylinder (1) and the outer peripheral wall of the inner cylinder (4); a plurality of water outlet channels (12) communicating with the water storage cavity (5) are provided on the flange (1.1), and a one-way valve (13) is connected in each of the water outlet channels (12).

4. A water hammer eliminator according to claim 3, characterized in that, The compression spring (2) is fitted with a waterproof rubber sealing sleeve (21).

5. A water hammer eliminator according to claim 4, characterized in that, It also includes a support pad (6), which is disposed on the upper end face of the outer cylinder (1), and the upper end face of the support pad (6) abuts against the inner bottom wall of the top of the outer cylinder (1).

6. A water hammer eliminator according to claim 5, characterized in that, An air outlet pipe (42) is provided at the upper end of the inner cylinder (4). One end of the air outlet pipe (42) is connected to the inside of the inner cylinder (4), and the other end passes through the support pad (6) and the outer cylinder (1) in sequence to connect with the outside atmosphere.

7. A water hammer eliminator according to claim 1, 2, 3, 4, 5 or 6, characterized in that, The frictional force on the inner circumferential wall of the outer cylinder (1) gradually increases from bottom to top.

8. A water hammer eliminator according to claim 5 or 6, characterized in that, The support pad (6) is made of polyurethane.

9. A water hammer eliminator according to claim 1, 2, 3, 4, 5 or 6, characterized in that, The buffer plate (3) is made of polyketone resin.

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