A pipeline pressure buffering device

Abstract

The present invention discloses a pipeline pressure buffering device, which comprises a main pipe body, a fixing block, a push rod and a piston; the front end of the main pipe body has an opening and can be connected to a water pipe, and a plug body is arranged at the rear end; the fixing block is fixedly installed in the middle of the main pipe body to divide the main pipe body into a front section and a rear section, an installation hole is arranged in the middle of the fixing block, and an exhaust pore is arranged at a position of the front section close to the connection block; the push rod is installed in the main pipe body and is movably matched with the installation hole, and a connection block is arranged at the front end of the push rod; the piston is movably installed in the front section; the piston is connected to the connection block through a first buffering structure, the connection block is connected to the fixing block through a first elastic resetting piece, and the rear end of the push rod is connected with a second buffering structure. The pipeline pressure buffering device of the present invention can play a good buffering role in the suddenly generated water pressure in the water pipe, reduce the suddenly generated water pressure in the water pipe, keep the water supply stable, and can play a good protective role in the water pipe.

Description

Technical Field

[0001] The present invention relates to the technical field of fluid control components, and particularly relates to a pipeline pressure buffering device. Background Art

[0002] In domestic, industrial and other water uses, since the water supply plant will estimate a water consumption according to needs and set a value for the water supply pump, even if the water supply plant is provided with a sensing device, there will inevitably be uncertain factors causing the water consumption to deviate from this value. However, the water supply pump of the water supply plant cannot perceive the deviation of the water consumption in time. Therefore, when the water consumption deviates from the water supply volume, it will cause slight or strong fluctuations in the water pressure in the water pipe. In the lightest case, users will feel that the water volume is large or small, and in the worst case, the water pipe will burst, making it difficult to repair the water pipes installed under the road and in the wall, and the repair cost is relatively high. Summary of the Invention

[0003] The present invention aims to solve at least one of the above-mentioned technical problems, and provides a pipeline pressure buffering device, which can play a good buffering role in the water pressure fluctuation in the water pipe, reduce the suddenly generated water pressure in the water pipe, keep the water supply volume stable, and can play a good protective role for the water pipe.

[0004] In order to achieve the above purpose, the technical solution adopted by the present invention is: a pipeline pressure buffering device, comprising:

[0005] A main pipe body, which has an opening at its front end and can be connected to a water pipe through an interface, and a plug body for closing its port is detachably arranged at the rear end;

[0006] A fixing block, which is fixedly installed in the middle of the main pipe body to divide the main pipe body into a front section and a rear section. An installation hole extending along the axis direction of the main pipe body is arranged in the middle of the fixing block, and an exhaust pore for discharging the air in the front section is arranged near the connecting block in the front section;

[0007] A push rod, which is installed in the main pipe body and is movably matched with the installation hole to be able to move along the axis direction of the main pipe body. The front end and the rear end of the push rod respectively extend to the front section and the rear section, and a connecting block is arranged at the front end;

[0008] A piston, which is movably installed in the front section and is hermetically matched with the inner wall of the front section through a first seal;

[0009] Wherein, the piston is connected to the side of the connecting block facing the opening through a first buffering structure, the side of the connecting block facing away from the opening is connected to the fixing block through a first elastic resetting member, and a second buffering structure is connected to the rear end of the push rod.

[0010] Preferably, the push rod is in sealing fit with the mounting hole through a second seal, so as to form a sealed chamber between the fixed block and the rear section. The chamber is filled with damping fluid. A buffer is arranged at the rear end of the push rod. A first gap for the damping fluid to pass through is arranged between the buffer and the chamber. A second gap for the damping fluid to flow unidirectionally towards the side of the fixed block is arranged on the buffer, so as to construct the second buffer structure.

[0011] Preferably, the buffer includes a diversion block, a sliding part and a second elastic reset part. A convex block is arranged at the rear end of the push rod. The diversion block is detachably and fixedly installed at the end of the rear end of the push rod, and a plurality of diversion holes for the damping fluid to pass through are arranged on the diversion block. The sliding part is movably arranged between the diversion block and the convex block, and the side facing away from the diversion block is connected to the convex block through the second elastic reset part, and can completely close the diversion holes under the action of the elastic force of the second elastic reset part.

[0012] Preferably, the diversion block is cylindrical, and a threaded connection part for threaded connection with the end of the push rod is arranged in the middle thereof. A plurality of diversion holes are uniformly arranged around the edge of the diversion block.

[0013] Preferably, a cylindrical sleeve is arranged at one end of the piston facing the connection block. The connection block is slidably arranged in the sleeve, and the connection block and the bottom of the sleeve are elastically connected through a spring, so as to construct the first buffer structure.

[0014] Preferably, a waist-shaped groove is arranged on the sleeve along its length direction, and a convex column slidably matched with the waist-shaped groove is arranged on the connection block.

[0015] Preferably, the first elastic reset part is a spring.

[0016] Preferably, an adjusting mechanism for adjusting the initial elastic force of the first elastic reset part is further included.

[0017] Preferably, the adjusting mechanism includes a knob, a nested part and a sliding sleeve. There are two fixed blocks. The connecting ends of the front section and the rear section are respectively connected to different fixed blocks. The two ends of the nested part are respectively embedded in the mounting holes of the two fixed blocks to fixedly connect the two fixed blocks. The sliding sleeve is slidably sleeved on the push rod. One end of the sliding sleeve abuts against the first elastic reset part, and the other end is provided with an external thread adjusting part. A limiting groove is arranged on the nested part to limit the rotation of the sliding sleeve. The knob is rotatably installed between the two fixed blocks and is in threaded cooperation with the external thread adjusting part.

[0018] Preferably, gaps are arranged between the sliding sleeve and the nested part, and between the knob and the two fixed blocks to form the exhaust pores.

[0019] The beneficial effects are as follows: Compared with the prior art, one pipeline pressure buffering device of the present invention can be simply installed on a water pipe through the end with an opening. When there are slight fluctuations in water pressure, it can push the piston to move towards the rear end of the front section, and the first buffering structure arranged between the piston and the connecting block absorbs the slight fluctuations to maintain the stability of the water pressure. When there are large fluctuations in water pressure, after the first buffering structure initially absorbs the water pressure, it is compressed to the extreme, thereby pushing the push rod to move towards the rear end of the rear section, and further enabling the second buffering structure to absorb the water pressure twice to maintain the stability of the water pressure. And by arranging a first elastic resetting member, the push rod and the piston can be reset after the water pressure is stable. Brief Description of the Drawings

[0020] The following further elaborates on the specific embodiments of the present invention in conjunction with the accompanying drawings, where:

[0021] Figure 1 is a schematic structural diagram of the pipeline pressure buffering device of the present invention;

[0022] Figure 2 is Figure 1 a schematic internal structural diagram of the pipeline pressure buffering device in

[0023] Figure 3 is Figure 2 an enlarged schematic structural diagram of part A in

[0024] Figure 4 is Figure 2 an enlarged schematic structural diagram of part B in

[0025] Figure 5 is Figure 2 a schematic installation structural diagram of another embodiment of the fixing block in

[0026] Figure 6 is a schematic connection diagram of the pipeline pressure buffering device of the present invention and a water pipe. Specific Embodiments

[0027] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0028] It should be noted that when a component is referred to as "fixed to" another component, it can be directly on the other component or there can be an intermediate component. When a component is considered to be "connected to" another component, it can be directly connected to the other component or there may be an intermediate component at the same time. When a component is considered to be "disposed on" another component, it can be directly disposed on the other component or there may be an intermediate component at the same time. When a part is referred to as "disposed in the middle", it is not only disposed at the exact middle position, but as long as it is not disposed at the two ends, it falls within the scope defined by the middle. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this invention belongs. The terms used herein in the specification of the present invention are for the purpose of describing specific embodiments only and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0030] As Figures 1 to 6 shown, a pipeline pressure buffer device includes a main pipe body 1, a fixing block 3, a push rod 7 and a piston 9. Specifically:

[0031] The main pipe body 1 can be cylindrical, and its front end has an opening and can be connected to a water pipe 30 through an interface 31. A plug body 2 for closing its port is detachably provided at the rear end. Preferably, the plug body 2 can be detachably installed on the main pipe body 1 by threaded connection;

[0032] The fixing block 3 is fixedly installed in the middle of the main pipe body 1 to divide the main pipe body 1 into a front section 4 and a rear section 5. An installation hole 6 extending along the axis direction of the main pipe body 1 is provided in the middle of the fixing block 3. An exhaust pore for exhausting the air in the front section 4 is provided at a position of the front section 4 close to the connection block 8, so that the air pressure in the front section 4 is balanced with the external air pressure; Specifically, the fixing block 3 is cylindrical, the main pipe body 1 can be provided with two sections, and is detachably and fixedly connected to both ends of the fixing block 3 by threaded connection;

[0033] The push rod 7 is installed in the main pipe body 1 and is movably matched with the installation hole 6, so that the push rod 7 can move along the axis direction of the main pipe body 1. The front end and the rear end of the push rod 7 respectively extend to the front section 4 and the rear section 5, and a connection block 8 is provided at the front end. The connection block 8 can be a circular block;

[0034] The piston 9 is movably installed in the front section 4 and is in sealing cooperation with the inner wall of the front section 4 through the first seal 13. Preferably, the first seal 13 can be an O-ring sleeved on the piston 9, and a plurality of them are arranged along the length direction of the piston 9 to improve the sealing performance between the piston 9 and the inner wall of the front section 4;

[0035] Among them, the piston 9 is connected to the side of the connecting block 8 facing the opening through the first buffer structure 10. The side of the connecting block 8 facing away from the opening is connected to the fixed block 3 through the first elastic reset member 11. The rear end of the push rod 7 is connected with the second buffer structure 12.

[0036] As Figure 6 shown, the pipeline pressure buffer device of the present invention can be fixedly installed on the water pipe 30 through the interface 31, so that the front section 4 of the main body 1 is communicated with the water pipe. The water pressure in the water pipe 30 acts on one end of the piston 9 facing the opening. When the water pressure fluctuates slightly, the piston 9 can be pushed to move towards the rear end of the front section 4, and the slight fluctuation is absorbed by the first buffer structure 10 arranged between the piston 9 and the connecting block 8 to maintain the stability of the water pressure; when the water pressure fluctuates greatly, after the first buffer structure 10 initially absorbs the water pressure, it is compressed to the extreme, thereby pushing the push rod 7 to move towards the rear end of the rear section 5, and then the second buffer structure 12 can absorb the water pressure for the second time to maintain the stability of the water pressure. And by providing the first elastic reset member 11, the push rod 7 and the piston 9 can be reset after the water pressure is stable. It should be noted that the front end of the front section 4 is the end connected to the water pipe 30, the rear end of the front section 4 is the end connected to the rear section 5, the front end of the rear section 5 is the end connected to the front section 4, and the rear end of the rear section 5 is the end where the plug body 2 is installed.

[0037] As Figure 4 shown, in one preferred embodiment, the push rod 7 can be in sealing cooperation with the mounting hole 6 through the second seal 14, so as to form a sealed chamber between the fixed block 3 and the rear section 5. Specifically, the second seal 14 can also be an O-ring. A plurality of O-rings are sleeved on the push rod 7, so that during the relative sliding of the push rod 7 with respect to the mounting hole 6, it can always maintain a sealed state with the inner wall of the mounting hole 6. The chamber is filled with damping fluid, and the damping fluid can be damping oil. A buffer member 15 is arranged at the rear end of the push rod 7. A first gap for the damping fluid to pass through is arranged between the buffer member 15 and the chamber. A second gap 17 for the damping fluid to flow unidirectionally towards the side of the fixed block 3 is arranged on the buffer member 15 to construct the second buffer structure 12.

[0038] Specifically, the buffer member 15 may include a diversion block 18, a sliding member 19, and a second elastic reset member 20. A convex block 21 is provided at the rear end of the push rod 7. The diversion block 18 is detachably and fixedly installed at the end of the rear end of the push rod 7, and a number of diversion holes for allowing damping fluid to pass through are provided on the diversion block 18 to form the second gap 17. The space between the outer wall of the diversion block 18 and the inner wall of the chamber forms the first gap. Specifically, the diversion block 18 can be detachably and fixedly installed at the end of the push rod 7 by means of a threaded connection. The sliding member 19 is movably arranged between the diversion block 18 and the convex block 21, and the side facing away from the diversion block 18 is connected to the convex block 21 by a second elastic reset member 20, and can completely close the diversion holes under the action of the elastic force of the second elastic reset member 20. Preferably, the second elastic reset member 20 can be a spring sleeved on the push rod 7.

[0039] When there are large fluctuations in the water pressure, the water pressure drives the push rod 7 to move towards the rear end of the rear section 5, causing the diversion block 18 to move in the damping fluid. During the movement of the diversion block 18, the damping fluid exerts a pressure on the sliding member 19 after passing through the diversion holes, causing the sliding member 19 to separate from the diversion block 18, thereby opening the diversion holes on the diversion block 18, and the damping fluid can flow through the diversion holes and the first gap, enabling the buffer member 15 to move towards the rear end of the rear section 5 at a relatively fast speed. And during the movement, the water pressure is quickly absorbed through the damping effect of the damping fluid. When the water pressure is stable, under the action of the elastic force of the second elastic reset member 20, the sliding member 19 returns to its original position and abuts against the diversion block 18, and closes the diversion holes on the diversion block 18, so that the damping fluid can only flow through the first gap. Thus, under the action of the elastic force of the first elastic reset member 11, the buffer member 15 slowly resets to prevent the buffer member 15 from quickly resetting and causing another sudden change in water pressure to the water pipe, thereby protecting the water pipe.

[0040] Preferably, the diversion block 18 can be cylindrical, with a threaded connection portion provided in the middle for threaded connection with the end of the push rod 7. A number of diversion holes are evenly distributed around the edge of the diversion block 18. Specifically, the threaded connection portion can be a threaded hole, and the end of the push rod 7 is provided with an external thread that is threadedly engaged with the threaded connection hole. The threaded connection method facilitates the disassembly and assembly of the diversion block 18. The distance between the diversion block 18 and the inner wall of the chamber can be designed according to specific needs, that is, the greater the distance, the faster the first elastic reset member 11 resets. The sliding member 19 can be conically arranged, with a larger outer diameter at the end facing the diversion block 18 and provided with a sealing plate for closing the diversion holes. A gap is provided in the middle of the sliding member to be able to be sleeved on the push rod 7, and the inner diameter of the gap at the smaller outer diameter end of the sliding member 19 is matched with the outer diameter of the push rod 7 to enable the sliding member 19 to slide stably along the axis of the push rod 7.

[0041] As Figure 3As shown, in another preferred embodiment, a cylindrical sleeve 22 may be provided at one end of the piston 9 facing the connecting block 8. The connecting block 8 is slidably disposed within the sleeve 22, and the connecting block 8 and the bottom of the sleeve 22 are elastically connected by a spring to form the first buffer structure 10. When there is a small water pressure fluctuation, the piston 9 can compress the spring, and the minute fluctuation can be absorbed by compressing the spring. When there is a large fluctuation, the spring is compressed to the extreme, thereby pushing the push rod 7 to move, and then the water pressure can be secondarily absorbed by the second buffer structure 12. By providing the sleeve 22, it is convenient for the installation of the spring, improving the stability of the spring installation, and by cooperating with the sleeve 22 and the connecting block 8, the end of the push rod 7 can be limited, improving the stability of the movement of the push rod 7.

[0042] Furthermore, a waist-shaped groove 23 may be provided along the length direction of the sleeve 22, and a convex post 24 slidably engaged with the waist-shaped groove 23 is provided on the connecting block 8. When the piston 9 is in its original position, the convex post 24 is located at the end of the waist-shaped groove 23 facing away from the opening. When the water pressure drives the piston 9 to move towards the rear end of the rear section 4, the convex post 24 moves towards the front end of the main body 1 relative to the piston 9 until the convex post 24 abuts against the end of the waist-shaped groove 23 facing the opening, thereby enabling the piston 9 to push the push rod 7 to move.

[0043] Preferably, the first elastic reset member 11 is also a spring. The spring is sleeved on the push rod 7, with one end abutting against the connecting block 8 and the other end abutting against the fixed block 3. Due to the action of the spring force, the push rod 7 and the piston 9 can be reset when the water pressure is stable.

[0044] As Figure 5 shown, in a more preferred embodiment, an adjusting mechanism for adjusting the initial elastic force of the first elastic reset member 11 may further be included. The initial elastic force of the first elastic reset member 11 is the elastic force of the first elastic reset member 11 when the water pressure is stable. The initial elastic force value of the first elastic reset member 11 can be increased and decreased through the adjusting mechanism, so as to be matched with different water pressures.

[0045] Specifically, the adjusting mechanism may include a knob 25, a sleeve 26 and a sliding sleeve 27. There are two fixing blocks 3. The end parts where the front section 4 and the rear section 5 are connected are respectively connected to different fixing blocks 3. The two ends of the sleeve 26 are respectively inserted into the mounting holes 6 of the two fixing blocks 3 to fixedly connect the two fixing blocks 3. The sliding sleeve 27 is slidably sleeved on the push rod 7. One end of the sliding sleeve 27 abuts against the first elastic reset member 11, and the other end is provided with an external thread adjusting portion 28. A limiting groove 29 is provided on the sleeve 26 to limit the rotation of the sliding sleeve 27. The knob 25 is rotatably installed between the two fixing blocks 3 and is in threaded cooperation with the external thread adjusting portion 28. Specifically, a hole for the sliding sleeve 27 to pass through is provided in the middle of the sleeve 26. The other end of the sliding sleeve 27 protrudes with a protrusion that matches the width of the limiting groove 29 and protrudes from the surface of the sleeve 26. The external thread adjusting portion 28 is provided on the protrusion. Since the protrusion cooperates with the limiting groove 29, the sliding sleeve 27 cannot rotate relative to the push rod 7. Therefore, by rotating the knob 25, the sliding sleeve 27 can move along the axis direction of the push rod 7, thereby adjusting the initial elastic force of the first elastic reset member 11.

[0046] More preferably, gaps are provided between the sliding sleeve 27 and the sleeve 26, and between the knob 25 and the two fixing blocks 3 to form the exhaust pores. Through the gaps between the sliding sleeve 27 and the sleeve 26, and between the knob 25 and the two fixing blocks 3, the balance between the inside of the front section 4 and the external pressure is maintained to ensure that the piston 9 can move inside the front section 4 without opening exhaust pores on the main body 1.

[0047] The above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them. Any modification or equivalent replacement that does not depart from the spirit and scope of the present invention shall be covered by the technical solutions of the present invention.

Claims

1. A pipeline pressure buffering device, characterized in that, Comprising: A main pipe body (1), having an opening at its front end and capable of being connected to a water pipe (30) through an interface (31), and a plug body (2) detachably arranged at its rear end to close its port; A fixing block (3), fixedly installed in the middle of the main pipe body (1) to divide the main pipe body (1) into a front section (4) and a rear section (5). An installation hole (6) extending along the axis direction of the main pipe body (1) is provided in the middle of the fixing block (3). An exhaust pore for exhausting the air in the front section (4) is provided at a position of the front section (4) close to the connection block (8); A push rod (7), installed in the main pipe body (1) and movably matched with the installation hole (6) to be able to move along the axis direction of the main pipe body (1). The front end and the rear end of the push rod (7) respectively extend into the front section (4) and the rear section (5), and a connection block (8) is provided at the front end. The push rod (7) is hermetically matched with the installation hole (6) through a second seal (14) so that a sealed chamber is formed between the fixing block (3) and the rear section (5). The chamber is filled with damping liquid. A buffer member (15) is provided at the rear end of the push rod (7). A first gap for the damping liquid to pass through is provided between the buffer member (15) and the chamber. A second gap (17) for the damping liquid to flow unidirectionally toward the side of the fixing block (3) is provided on the buffer member (15) to construct a second buffer structure (12); A piston (9), movably installed in the front section (4) and hermetically matched with the inner wall of the front section (4) through a first seal (13); Wherein, the piston (9) is connected to the side of the connection block (8) facing the opening through a first buffer structure (10). The side of the connection block (8) facing away from the opening is connected to the fixing block (3) through a first elastic reset member (11). A second buffer structure (12) is connected to the rear end of the push rod (7). A cylindrical sleeve (22) is provided at one end of the piston (9) facing the connection block (8). The connection block (8) is slidably arranged in the sleeve (22). The connection block (8) and the bottom of the sleeve (22) are elastically connected through a spring to construct the first buffer structure (10).

2. The pipeline pressure buffering device according to claim 1, wherein The buffer member (15) includes a diversion block (18), a sliding member (19) and a second elastic reset member (20). A convex block (21) is provided at the rear end of the push rod (7). The diversion block (18) is detachably and fixedly installed at the end of the rear end of the push rod (7), and a plurality of diversion holes for the damping liquid to pass through are provided on the diversion block (18). The sliding member (19) is movably arranged between the diversion block (18) and the convex block (21), and the side facing away from the diversion block (18) is connected to the convex block (21) through a second elastic reset member (20), and can completely close the diversion holes under the action of the elastic force of the second elastic reset member (20).

3. The pipeline pressure buffering device according to claim 2, characterized in that, The diversion block (18) is cylindrical, and a threaded connection portion for threaded connection with the end of the push rod (7) is provided in the middle thereof. A plurality of diversion holes are uniformly arranged around the edge of the diversion block (18).

4. A pipeline pressure buffering device according to claim 1, characterized in that A waist-shaped groove (23) is provided on the sleeve (22) along its length direction. A convex column (24) slidably matched with the waist-shaped groove (23) is provided on the connection block (8).

5. A pipeline pressure buffering device according to claim 1, characterized in that, The first elastic reset member (11) is a spring.

6. The pipeline pressure buffering device according to claim 5, characterized in that, It further includes an adjusting mechanism for adjusting the initial elastic force of the first elastic reset member (11).

7. A pipeline pressure buffering device according to claim 6, characterized in that, The adjusting mechanism includes a knob (25), a nested member (26) and a sliding sleeve (27). There are two fixing blocks (3). The connecting ends of the front section (4) and the rear section (5) are respectively connected to different fixing blocks (3). The two ends of the nested member (26) are respectively fitted into the mounting holes (6) of the two fixing blocks (3) so that the two fixing blocks (3) are fixedly connected. The sliding sleeve (27) is slidably sleeved on the push rod (7). One end of the sliding sleeve abuts against the first elastic reset member (11), and the other end is provided with an external thread adjusting portion (28). A limiting groove (29) is provided on the nested member (26) to limit the rotation of the sliding sleeve (27). The knob (25) is rotatably installed between the two fixing blocks (3) and is in threaded cooperation with the external thread adjusting portion (28).

8. A pipeline pressure buffering device according to claim 7, characterized in that, A gap is provided between the sliding sleeve (27) and the nested member (26), and between the knob (25) and the two fixing blocks (3) to form the exhaust pores.

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