Water hammer eliminator capable of being axially installed

Abstract

A water hammer eliminator capable of being axially installed comprises a water inlet connector, a buffer cylinder matched with the water inlet connector is arranged at the right end of the water inlet connector, and a cylinder opening of the buffer cylinder faces leftwards. An annular limiting groove is formed in the outer wall of the right portion of the water inlet connector. A limiting part matched with the limiting groove is arranged at a cylinder opening in the left end of the buffer cylinder; an annular left positioning plate is arranged in the middle of the water inlet joint; a plurality of water outlet holes which are uniformly distributed along the circumference are formed in the right part of the water inlet joint; the water outlet hole is positioned between the left positioning plate and the limiting groove; a water outlet joint coaxial with the buffer cylinder is arranged on the right side of the buffer cylinder; an annular right positioning plate is arranged on the outer wall of the left end of the water outlet connector. The water hammer eliminator capable of being axially installed can be axially installed between two independent pipelines in a water conveying system, the situation that the occupied space is large due to the fact that the water hammer eliminator is vertically installed on the pipelines is effectively avoided, a large amount of installation troubles are reduced, and installation efficiency is effectively improved.

Description

Technical Field

[0001] The utility model relates to a water hammer arrester, in particular to a water hammer arrester which can be installed axially. Background Art

[0002] A water hammer eliminator is a device that can prevent water hammer. Water hammer refers to the hydraulic phenomenon in which the water flow rate suddenly changes due to some external reasons in a pressurized pipeline, causing water hammer.

[0003] The traditional water hammer eliminator has only one joint, which is the water inlet joint. The water inlet joint is directly installed on the pipeline of the water supply system and can introduce the water flow in the pipeline into the water hammer eliminator. When water hammer occurs, the piston in the water hammer eliminator will be affected by the water pressure and move, thereby using the increasing air pressure in the water hammer eliminator to effectively buffer the water pressure. It can be seen that once the water flows into the water hammer eliminator through the joint, it can only wait for the piston to reset and squeeze the water flow back into the pipeline, resulting in the water hammer eliminator being unable to be used to connect two independent pipelines. In order to ensure that the water flow in the pipeline of the water supply system can flow smoothly, the water hammer eliminator can only be installed vertically in the pipeline through the water inlet joint. This installation method will cause the water hammer eliminator to occupy a large space, which is not conducive to the layout of the pipeline and the installation of the water hammer eliminator, resulting in the installation work becoming troublesome and the installation efficiency being seriously reduced. Summary of the invention

[0004] The utility model aims to solve the existing technical problem and provide an axially installable water hammer arrester, which can be axially installed between two independent pipes in a water supply system, effectively avoiding the situation where vertical installation on the pipe causes the space occupied to be large, thus reducing a lot of installation troubles and effectively improving installation efficiency.

[0005] The technical solution adopted by the utility model to solve the above technical problems is:

[0006] The utility model discloses an axially installable water hammer eliminator, comprising a water inlet joint, wherein a buffer cylinder matching the water inlet joint is arranged at the right end of the water inlet joint, and the mouth of the buffer cylinder faces left; an annular limiting groove is arranged on the outer wall of the right part of the water inlet joint; a limiting portion matching the limiting groove is arranged at the mouth of the left end of the buffer cylinder; an annular left positioning plate is arranged at the middle part of the water inlet joint; a plurality of water outlet holes evenly distributed in a circumference are arranged at the right part of the water inlet joint; the water outlet holes are located between the left positioning plate and the limiting groove; a limiting portion matching the limiting groove is arranged on the right side of the buffer cylinder Its coaxial water outlet joint; a ring-shaped right positioning plate is provided on the outer wall of the left end of the water outlet joint; an outer shell is provided between the left positioning plate and the right positioning plate and is set outside the buffer cylinder, and the outer shell is tubular; the gap between the inner wall of the outer shell and the outer wall of the buffer cylinder is connected through the water outlet hole and the internal space of the water inlet joint; a piston matching it is provided in the buffer cylinder, and the piston blocks and seals the right end port of the water inlet joint; there is a buffer distance between the right end face of the piston and the right inner wall of the buffer cylinder; the right end of the buffer cylinder is provided with an auxiliary buffer device matching it.

[0007] The right side wall of the left positioning plate is provided with a left positioning part coaxial therewith; the left side wall of the right positioning plate is provided with a right positioning part coaxial therewith; the left end of the shell is sleeved outside the left positioning part, and the right end of the shell is sleeved outside the right positioning part.

[0008] The left end surface of the shell is fixed to the right side wall of the left positioning plate by welding; the right end surface of the shell is fixed to the left side wall of the right positioning plate by welding.

[0009] The auxiliary buffer device includes a sealing step arranged on the outer wall of the right end of the buffer cylinder, and the sealing step is annular; a sealing cover matching the right end of the buffer cylinder is screwed on; the cover opening of the sealing cover faces left, and the left end surface of the sealing cover fits with the sealing step; a buffer pad fitting with the outer wall of the right side of the buffer cylinder is arranged in the sealing cover, and the buffer pad is made of rubber; a pressure plate fitting with the buffer pad is arranged on the right side of the buffer pad; an auxiliary spring is arranged between the right side wall of the pressure plate and the right inner wall of the sealing cover; an air gathering hole which is wider on the left and narrower on the right is arranged in the center of the left side wall of the buffer pad; an air vent which communicates with the air gathering hole is arranged in the center of the right inner wall of the buffer cylinder.

[0010] The right side wall of the buffer pad is provided with an annular locking groove; the left side wall of the pressure plate is provided with a left locking portion matching the locking groove; the right side wall of the pressure plate is provided with a right locking portion coaxial with the left locking portion; the left locking portion and the right locking portion are both annular; the right locking portion is embedded in the left end of the auxiliary spring.

[0011] The limiting portion is formed by pressing inwardly from the mouth of the buffer tube; the right side wall of the limiting groove is a transition cone surface that is narrow on the left and wide on the right; the left end of the buffer tube is pressed inwardly to form a transition portion that fits the transition cone surface.

[0012] The outer wall of the piston is provided with a plurality of sealing grooves evenly distributed axially; a sealing ring matching the sealing groove is provided in the sealing groove; the inner wall of the right end port of the water inlet joint is provided with a sealing cone surface which is narrow on the left and wide on the right; the left end of the piston is hemispherical, and the surface of the left end of the piston fits with the sealing cone surface.

[0013] The beneficial effects of the utility model are:

[0014] Compared with the prior art, the axially installable water hammer arrester adopting the structure of the utility model has both a water inlet joint and a water outlet joint, which can connect two independent pipes at the same time, and the water inlet joint and the water outlet joint are coaxially distributed, so that it can be axially installed on the pipe of the water delivery system without vertical installation, which effectively reduces the actual occupied space, facilitates the installation of the water hammer arrester, and improves the installation efficiency. At the same time, the buffering effect of the piston can be further improved through the auxiliary buffer device, effectively avoiding the situation where the water hammer phenomenon causes excessive water pressure and makes it difficult for the piston to buffer, thereby ensuring the anti-water hammer effect to the greatest extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a cross-sectional view of the axially mounted water hammer arrester of the utility model;

[0016] Figure 2 It is a cross-sectional view of the utility model when the right end of the buffer cylinder of the axially mounted water hammer arrester is screwed with a sealing cover;

[0017] Figure 3 The utility model is a schematic diagram of the structure of the axially mounted water hammer arrester. DETAILED DESCRIPTION

[0018] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments:

[0019] See also Figures 1 to 3The utility model provides an axially installable water hammer arrester, comprising a water inlet joint 1, wherein a buffer cylinder 2 matching the water inlet joint 1 is provided at the right end thereof, and the mouth of the buffer cylinder 2 faces left; an annular limiting groove 3 is provided on the outer wall of the right part of the water inlet joint 1; a limiting portion 4 matching the limiting groove 3 is provided at the left end mouth of the buffer cylinder 2; an annular left positioning plate 5 is provided at the middle part of the water inlet joint 1; a plurality of water outlet holes 6 evenly distributed in a circumference are provided at the right part of the water inlet joint 1; the water outlet holes 6 are located between the left positioning plate 5 and the limiting groove 3; a coaxial water outlet hole 6 is provided on the right side of the buffer cylinder 2 A water outlet joint 7; a right annular positioning plate 8 is provided on the outer wall of the left end of the water outlet joint 7; a shell 9 is provided between the left positioning plate 5 and the right positioning plate 8, and is set outside the buffer cylinder 2, and the shell 9 is tubular; the gap between the inner wall of the shell 9 and the outer wall of the buffer cylinder 2 is connected with the internal space of the water inlet joint 1 through the water outlet hole 6; a piston 10 matching it is provided in the buffer cylinder 2, and the piston 10 blocks and seals the right end port of the water inlet joint 1; a buffer distance 11 is provided between the right end face of the piston 10 and the right inner wall of the buffer cylinder 2; an auxiliary buffer device matching it is provided at the right end of the buffer cylinder 2.

[0020] The right side wall of the left positioning plate 5 is provided with a left positioning portion 12 coaxial therewith; the left side wall of the right positioning plate 8 is provided with a right positioning portion 13 coaxial therewith; the left end of the shell 9 is sleeved outside the left positioning portion 12, and the right end of the shell 9 is sleeved outside the right positioning portion 13.

[0021] The left end surface of the shell 9 is fixed to the right side wall of the left positioning plate 5 by welding; the right end surface of the shell 9 is fixed to the left side wall of the right positioning plate 8 by welding.

[0022] The auxiliary buffer device includes a sealing step 14 arranged on the outer wall of the right end of the buffer tube 2, and the sealing step 14 is annular; a sealing cover 15 matching the buffer tube 2 is screwed on the right end; the cover opening of the sealing cover 15 faces left, and the left end face of the sealing cover 15 fits with the sealing step 14; a buffer pad 16 fitting with the outer wall of the right side of the buffer tube 2 is arranged in the sealing cover 15, and the buffer pad 16 is made of rubber; a pressure plate 17 fitting with the buffer pad 16 is arranged on the right side; an auxiliary spring 18 is arranged between the right side wall of the pressure plate 17 and the right inner wall of the sealing cover 15; an air gathering hole 19 which is wider on the left and narrower on the right is arranged in the center of the left side wall of the buffer pad 16; an air vent 20 communicating with the air gathering hole 19 is arranged in the center of the right inner wall of the buffer tube 2.

[0023] The right side wall of the buffer pad 16 is provided with an annular locking groove 21; the left side wall of the pressure plate 17 is provided with a left locking portion 22 matching the locking groove 21; the right side wall of the pressure plate 17 is provided with a right locking portion 23 coaxial with the left locking portion 22; the left locking portion 22 and the right locking portion 23 are both annular; the right locking portion 23 is embedded in the left end of the auxiliary spring 18.

[0024] The limiting portion 4 is formed by pressing inward from the mouth of the buffer tube 2; the right side wall of the limiting groove 3 is a transition cone 24 that is narrow on the left and wide on the right; the left end of the buffer tube 2 is pressed inward to form a transition portion 25 that fits the transition cone 24.

[0025] The outer wall of the piston 10 is provided with a plurality of sealing grooves 26 which are evenly distributed axially; a sealing ring 27 matching the sealing groove 26 is provided in the sealing groove; the inner wall of the right end port of the water inlet joint 1 is provided with a sealing cone surface 28 which is narrow on the left and wide on the right; the left end of the piston 10 is hemispherical, and the left end surface of the piston 10 fits with the sealing cone surface 28.

[0026] The method of using the utility model is as follows:

[0027] The water inlet joint 1 can be axially connected to the pipe on the left, and the water outlet joint 7 can be axially connected to the pipe on the right, thereby achieving the effect of connecting two independent pipes. At this time, the water flow trajectory of the water supply system is from left to right. When the water flow in the left pipe flows into the water inlet joint 1, under normal water pressure, the piston 10 remains stationary, and the water flow entering the water inlet joint 1 will flow into the gap between the inner wall of the outer shell 9 and the outer wall of the buffer cylinder 2 through the water outlet hole 6, and then enter the water outlet joint 7 through the left end port of the water outlet joint 7, and finally flow into the right pipe through the water outlet joint 7 to realize water delivery.

[0028] If water hammer occurs suddenly during water flow transportation, the sudden change in water pressure will push the piston 10 to the right. As the piston 10 moves to the right, the buffer spacing 11 between the right end face of the piston 10 and the right inner wall of the buffer cylinder 2 continues to decrease. At this time, the space between the right end face of the piston 10 and the right inner wall of the buffer cylinder 2 continues to decrease, and the gas in the space is continuously squeezed to form high pressure. This high pressure will counteract the water pressure through the piston 10, thereby effectively eliminating the sudden increase in water pressure, achieving a buffering effect, and effectively eliminating the water hammer phenomenon.

[0029] If the water hammer phenomenon causes the water pressure to be too high, the high pressure formed by the gas being squeezed in the space between the right end face of the piston 10 and the right inner wall of the buffer cylinder 2 cannot completely eliminate the water hammer. At this time, the squeezed gas will enter the gas gathering hole 19 through the vent hole 20 and exert pressure on the bottom of the gas gathering hole 19. First, the buffer pad 16 will deform due to the pressure due to the characteristics of its own rubber material and produce elasticity. This elasticity can cooperate with the squeezed gas in the buffer cylinder 2 to buffer the water pressure through the piston 10, and the compressed buffer pad 16 will move to the right along the trajectory of the inner wall of the sealing cover 15. At this time, the buffer pad 16 moves left The space between the side wall and the right outer wall of the buffer cylinder 2 will gradually increase, thereby increasing the actual space between the right end face of the piston 10 and the right inner wall of the buffer cylinder 2 in disguise, so that more gas can be squeezed, further increasing the pressure of the compressed gas, thereby further buffering the water pressure and further eliminating the water hammer phenomenon. At the same time, as the buffer pad 16 moves to the right, the buffer pad 16 will squeeze the auxiliary spring 18 to the right through the pressure plate 17, so that the auxiliary spring 18 is compressed and generates elasticity, and this elasticity will be directly applied to the buffer pad 16, ultimately improving the buffering effect of the piston 10 and eliminating the water hammer phenomenon to the greatest extent.

[0030] In summary, the utility model has both a water inlet joint 1 and a water outlet joint 7, which can connect two independent pipes at the same time, and the water inlet joint 1 and the water outlet joint 7 are coaxially distributed, so they can be axially installed on the pipe of the water delivery system without vertical installation, which effectively reduces the actual space occupied, facilitates the installation of the water hammer eliminator, and improves the installation efficiency. At the same time, the buffering effect of the piston 10 can be further improved through the auxiliary buffer device, effectively avoiding the situation where the water hammer phenomenon causes excessive water pressure and makes it difficult for the piston 10 to buffer, thereby ensuring the anti-water hammer effect to the greatest extent.

[0031] A left positioning portion 12 coaxial with the left positioning plate 5 is provided on the right side wall, and a right positioning portion 13 coaxial with the left side wall of the right positioning plate 8 is provided. The left end of the outer shell 9 is sleeved outside the left positioning portion 12, and the right end of the outer shell 9 is sleeved outside the right positioning portion 13. The existence of the left positioning portion 12 can quickly help the left positioning plate 5 and the left end of the outer shell 9 to be assembled, and the existence of the right positioning portion 13 can quickly help the right positioning plate 8 and the right end of the outer shell 9 to be assembled.

[0032] The left end face of the shell 9 is fixed to the right side wall of the left positioning plate 5 by welding, and the right end face of the shell 9 is fixed to the left side wall of the right positioning plate 8 by welding. This fixing method can not only ensure the stability between the left and right ends of the shell 9 and the left positioning plate 5 and the right positioning plate 8, but also ensure the sealing of the left and right end ports of the shell 9 after the left and right ends of the shell 9 are fixed to the left positioning plate 5 and the right positioning plate 8, thereby preventing water leakage.

[0033] The limiting portion 4 is formed by pressing inwardly at the mouth of the buffer tube 2. The right side wall of the limiting groove 3 is a transition cone 24 that is narrow on the left and wide on the right. The left end of the buffer tube 2 is pressed inwardly to form a transition portion 25 that fits the transition cone 24. The presence of the transition cone 24 can effectively limit the degree of deformation of the transition portion 25 when it is pressed, thereby avoiding the situation where the mouth of the buffer tube 2 is easily broken due to excessive deformation of the transition portion 25.

[0034] The right side wall of the buffer pad 16 is provided with an annular locking groove 21, and the left side wall of the pressure plate 17 is provided with a left locking portion 22 matching the locking groove 21. The air gathering hole 19 is wide on the left and narrow on the right, which can concentrate the air pressure on the middle part of the buffer pad 16, and the left locking portion 22 can cooperate with the air gathering hole 19 to limit the deformation direction of the buffer pad 16, so that the pressure on the buffer pad 16 can be accurately applied to the pressure plate 17, thereby stabilizing the auxiliary spring 18 for compression, ensuring the stability of the auxiliary spring 18 during buffering, and avoiding the situation where the pressure plate 17 tilts when moving and affects the buffering effect of the auxiliary spring 18.

[0035] A right locking portion 23 coaxial with the left locking portion 22 is provided on the right side wall of the pressure plate 17. The right locking portion 23 is embedded in the left end of the auxiliary spring 18. The existence of the right locking portion 23 can effectively ensure the stability of the left end of the auxiliary spring 18, thereby ensuring the stability of the auxiliary spring 18 when it is compressed and expanded.

[0036] The outer wall of the piston 10 is provided with a plurality of sealing grooves 26 evenly distributed in the axial direction, and a matching sealing ring 27 is provided in the sealing groove 26 . The presence of the sealing ring 27 can effectively improve the sealing between the outer wall of the piston 10 and the inner wall of the buffer cylinder 2 .

[0037] The inner wall of the right end port of the water inlet connector 1 is provided with a sealing cone 28 which is narrow on the left and wide on the right. The left end of the piston 10 is hemispherical, and the left end surface of the piston 10 fits with the sealing cone 28. The spherical surface of the left end of the piston 10 is easier to fit with the sealing cone 28. This sealing method can further improve the sealing performance when the piston 10 blocks the right end port of the water inlet connector 1.

Claims

1. An axially mountable water hammer arrester, comprising a water inlet joint, characterized in that: A buffer cylinder matching it is provided at the right end of the water inlet joint, and the mouth of the buffer cylinder faces left; an annular limiting groove is provided on the outer wall of the right part of the water inlet joint; a limiting part matching the limiting groove is provided on the left end mouth of the buffer cylinder; an annular left positioning plate is provided at the middle part of the water inlet joint; a plurality of water outlet holes evenly distributed in a circle are provided at the right part of the water inlet joint; the water outlet holes are located between the left positioning plate and the limiting groove; a water outlet joint coaxial with it is provided on the right side of the buffer cylinder; an annular right positioning plate is provided on the outer wall of the left end of the water outlet joint; an outer shell set outside the buffer cylinder is provided between the left positioning plate and the right positioning plate, and the outer shell is tubular; a gap between the inner wall of the outer shell and the outer wall of the buffer cylinder is connected through the water outlet hole and the internal space of the water inlet joint; a piston matching it is provided in the buffer cylinder, and the piston blocks and seals the right end port of the water inlet joint; there is a buffering distance between the right end face of the piston and the right inner wall of the buffer cylinder; an auxiliary buffer device matching it is provided at the right end of the buffer cylinder.

2. The axially mountable water hammer arrester according to claim 1, characterized in that: The right side wall of the left positioning plate is provided with a left positioning part coaxial therewith; the left side wall of the right positioning plate is provided with a right positioning part coaxial therewith; the left end of the shell is sleeved outside the left positioning part, and the right end of the shell is sleeved outside the right positioning part.

3. The axially mountable water hammer arrester according to claim 2, characterized in that: The left end surface of the shell is fixed to the right side wall of the left positioning plate by welding; the right end surface of the shell is fixed to the left side wall of the right positioning plate by welding.

4. The axially mountable water hammer arrester according to claim 1, characterized in that: The auxiliary buffer device includes a sealing step arranged on the outer wall of the right end of the buffer cylinder, and the sealing step is annular; a sealing cover matching the right end of the buffer cylinder is screwed on; the cover opening of the sealing cover faces left, and the left end surface of the sealing cover fits with the sealing step; a buffer pad fitting with the outer wall of the right side of the buffer cylinder is arranged in the sealing cover, and the buffer pad is made of rubber; a pressure plate fitting with the buffer pad is arranged on the right side of the buffer pad; an auxiliary spring is arranged between the right side wall of the pressure plate and the right inner wall of the sealing cover; an air gathering hole which is wider on the left and narrower on the right is arranged in the center of the left side wall of the buffer pad; an air vent which communicates with the air gathering hole is arranged in the center of the right inner wall of the buffer cylinder.

5. The axially mountable water hammer arrester according to claim 4, characterized in that: The right side wall of the buffer pad is provided with an annular locking groove; the left side wall of the pressure plate is provided with a left locking portion matching the locking groove; the right side wall of the pressure plate is provided with a right locking portion coaxial with the left locking portion; the left locking portion and the right locking portion are both annular; the right locking portion is embedded in the left end of the auxiliary spring.

6. The axially mountable water hammer arrester according to claim 1, characterized in that: The limiting portion is formed by pressing inwardly from the mouth of the buffer tube; the right side wall of the limiting groove is a transition cone surface that is narrow on the left and wide on the right; the left end of the buffer tube is pressed inwardly to form a transition portion that fits the transition cone surface.

7. The axially mountable water hammer arrester according to claim 1, characterized in that: The outer wall of the piston is provided with a plurality of sealing grooves evenly distributed axially; a sealing ring matching the sealing groove is provided in the sealing groove; the inner wall of the right end port of the water inlet joint is provided with a sealing cone surface which is narrow on the left and wide on the right; the left end of the piston is hemispherical, and the surface of the left end of the piston fits with the sealing cone surface.

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