An automatic flow balancing valve

Abstract

The utility model provides a kind of automatic flow balance valve, belong to valve technical field.It solves the problem that existing valve cannot alleviate water pressure fluctuation in pipeline.This automatic flow balance valve, including valve body, the inside of valve body bottom has the water passing cavity of being cylindrical, the upper end of water passing cavity is communicated with inlet, the lower end of water passing cavity is sealedly connected with plug in valve body on the upper end, the lateral wall of water passing cavity is connected with outlet by water passing hole, check spring and the check cylinder of being cylindrical are arranged in water passing cavity, check cylinder can be abutted on the inner wall of valve body at the upper end of water passing cavity under the elastic force of check spring, backflow spring and the backflow rod of being circular rod are arranged in check cylinder, the outside of backflow rod upper end has the sealing portion of being circular ring, the lower end of backflow rod passes out check cylinder, backflow rod can move to the lower end direction of water passing cavity under the elastic force of backflow spring.This automatic flow balance valve can alleviate water pressure fluctuation in pipeline.

Description

Technical Field

[0001] This utility model belongs to the field of valve technology and relates to an automatic flow balancing valve. Background Technology

[0002] Valves are essential accessories for controlling the flow of media in pipelines. They can be used to control the flow of various types of fluids, including air, water, steam, various corrosive media, slurry, oil, liquid metals, and radioactive media. They function to control pipeline on / off switching and regulate flow rate.

[0003] In HVAC systems, valves are frequently used for flow control. To prevent water backflow, check valves are often integrated into the valves in the pipeline.

[0004] However, in actual use, the water pressure of the water flow inevitably fluctuates to a certain extent. When the water pressure at the inlet decreases, the water pressure at the outlet or end of the pipeline will also decrease accordingly, causing the water pressure in the pipeline to fluctuate to varying degrees, which is not conducive to flow control in the HVAC network. Utility Model Content

[0005] The purpose of this invention is to address the aforementioned problems in the existing technology by proposing an automatic flow balancing valve, which solves the problem that existing valves cannot alleviate water pressure fluctuations in pipelines.

[0006] The objective of this utility model can be achieved through the following technical solutions: An automatic flow balancing valve includes a valve body with an inlet at the right end and an outlet at the left end. A ball valve assembly is provided at the inlet of the valve body. The valve body has a cylindrical water passage cavity on its inner bottom side, with the axis of the water passage cavity inclined relative to the horizontal direction. The upper port of the water passage cavity communicates with the inlet, and the lower port of the water passage cavity extends to the bottom surface of the valve body. A plug is sealed to the lower port of the water passage cavity on the valve body. The sidewall of the water passage cavity communicates with the outlet through a water passage hole. A check spring and a cylindrical check cylinder are provided inside the water passage cavity. The check cylinder, under the elastic force of the check spring, abuts against the inner wall of the valve body at the upper port of the water passage cavity, forming a seal between the check cylinder and the inner wall of the valve body. A return spring and a round rod-shaped return rod pass through the check cylinder. The outer side of the upper end of the return rod has an annular sealing portion. The lower end of the return rod extends out of the check cylinder. Under the elastic force of the return spring, the return rod moves towards the lower port of the water passage cavity, causing the sealing portion to abut against the inner wall of the check cylinder to block its inner hole. When the check cylinder moves against the elastic force of the check spring, the lower end of the return rod abuts against the plug.

[0007] When this automatic flow balancing valve is connected to a pipeline, the pipeline's on / off control is achieved through a ball valve assembly. After the ball valve assembly opens, water flows into the valve body from the inlet. The water pressure acts on the check cylinder, causing it to overcome the spring force of the check spring and move downwards. A gap is formed between the check cylinder and the inner wall of the valve body, allowing water to flow through to the outlet. Simultaneously, as the check cylinder moves downwards against the spring force, the return rod inside the check cylinder moves downwards with it until its lower end abuts against the plug. When the check cylinder continues to move downwards, the return rod is blocked by the plug and cannot move further. The return rod then overcomes the spring force of the return spring and moves upwards relative to the check cylinder, releasing the seal between them and allowing the inner hole of the check cylinder to open. Because the lower end of the water passage chamber is always connected to the outlet through a water passage hole, the water pressure at the lower end of the water passage chamber is approximately the same as the water pressure at the outlet. When the inlet water pressure decreases, as the water flows through the gap between the check cylinder and the valve body towards the outlet, the water with higher pressure at the lower end of the water passage will flow back towards the inlet through the inner hole of the check cylinder, supplementing the water flow at the inlet, reducing the degree of water pressure drop at the inlet, mitigating the direct impact of water pressure fluctuations at the inlet on the water pressure at the outlet, and facilitating flow control in the HVAC network.

[0008] In the aforementioned automatic flow balancing valve, the inner wall of the check cylinder has a protruding, annular shoulder. The sealing part abuts against the upper side of the shoulder to form a seal. A nut is threadedly connected to the outer side of the lower end of the return rod. The return spring is sleeved on the outer side of the return rod, with one end abutting against the nut and the other end abutting against the lower side of the shoulder. The shoulder serves two purposes: it cooperates with the sealing part to form a seal and it provides a fulcrum for the return spring.

[0009] In the aforementioned automatic flow balancing valve, the outer side of the check cylinder has a protruding, annular portion. An annular sealing ring is positioned at one end of the protrusion facing the upper port of the water passage cavity. A recessed, annular spring groove is formed at the other end of the protrusion. One end of the check spring abuts against the bottom of the spring groove, and the other end abuts against the aforementioned plug. The protrusion, under the elastic force of the check spring, presses the sealing ring tightly against the inner wall of the valve body. Through the corresponding arrangement of the protrusion, check spring, and sealing ring, a better sealing effect can be achieved.

[0010] In the aforementioned automatic flow balancing valve, the plug comprises an annular plug ring and a cylindrical plug rod. The plug ring is threaded into the valve body, and the other end of the check spring abuts against the plug ring. The plug rod is threaded into the plug ring, with its upper end passing through the plug ring and extending into the water passage cavity. The lower end of the return rod abuts against the upper end of the plug rod. The outer end of the plug rod has a recessed operating hole with a regular hexagonal cross-section. The plug is divided into two parts: the plug ring provides stable support for the check spring, and the axial position of the plug rod can be adjusted using the operating hole and a wrench, thereby adjusting the opening position of the return rod. This allows for easy adjustment to different operating environments and has a wide range of applications.

[0011] In the aforementioned automatic flow balancing valve, a water outlet pipe is connected to the top of the valve body, and the inlet of the water outlet pipe is connected to the water outlet. An on / off valve assembly is connected to the water outlet pipe. A branch pipe extends from the water outlet side for connecting to other pipelines or for sewage discharge as needed.

[0012] In the above-mentioned automatic flow balancing valve, detection ports are provided on the top of the valve body between the water passage chamber and the water inlet, and on the side wall of the valve body between the water passage chamber and the water outlet. A tubular detection tube is fixed in each of the two detection ports. The outer ends of the two detection tubes extend out of the valve body, and end caps are detachably connected to the outer ends of the two detection tubes.

[0013] Compared with existing technologies, this automatic flow balancing valve utilizes the structural cooperation of a check cylinder, a backflow rod, and a plug. When the inlet water pressure decreases, while the water flows through the gap between the check cylinder and the valve body towards the outlet, the water with higher pressure at the lower end of the water passage chamber will flow back towards the inlet through the inner hole of the check cylinder, supplementing the water flow at the inlet, reducing the degree of water pressure drop at the inlet, mitigating the direct impact of water pressure fluctuations at the inlet on the water pressure at the outlet, and facilitating flow control in HVAC piping networks. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this automatic flow balancing valve.

[0015] Figure 2 This is a cross-sectional structural diagram of the automatic flow balancing valve.

[0016] In the diagram, 1. Valve body; 1a. Inlet; 1b. Outlet; 1c. Water passage chamber; 1d. Water passage hole; 1e. Detection port; 2. Ball valve assembly; 3. Plug; 3a. Plug ring; 3b. Plug column; 3c. Operating hole; 4. Check spring; 5. Check cylinder; 5a. Shoulder; 5b. Protrusion; 5c. Spring groove; 6. Return spring; 7. Return rod; 7a. Sealing part; 8. Nut; 9. Sealing ring; 10. Outlet pipe; 11. On / off valve assembly; 12. Detection tube; 13. End cap. Detailed Implementation

[0017] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0018] like Figure 1 and Figure 2 As shown, this automatic flow balancing valve includes a valve body 1. The valve body 1 has an inlet 1a at its right end and an outlet 1b at its left end. A ball valve assembly 2 is installed at the inlet 1a of the valve body 1. An outlet pipe 10 is connected to the top of the valve body 1, and the inlet of the outlet pipe 10 is connected to the outlet 1b. An on / off valve assembly 11 is connected to the outlet pipe 10. Here, both the ball valve assembly 2 and the on / off valve assembly 11 are existing components, including a ball core, valve stem, and handle.

[0019] The valve body 1 has a cylindrical water passage cavity 1c on the inner side of its bottom, and the axis of the water passage cavity 1c is inclined relative to the horizontal direction. The upper port of the water passage cavity 1c is connected to the water inlet 1a, and the lower port of the water passage cavity 1c is opened to the bottom surface of the valve body 1. A plug 3 is threadedly connected to the valve body 1 at the lower port of the water passage cavity 1c. The side wall of the upper end of the water passage cavity 1c is connected to the water outlet 1b through the water passage hole 1d. In this embodiment, the plug 3 includes an annular plug ring 3a and a cylindrical plug 3b. The plug ring 3a is threadedly connected to the valve body 1, and the plug 3b is threadedly connected to the plug ring 3a. The upper end of the plug 3b passes through the plug ring 3a and extends into the water passage cavity 1c. The outer end of the plug 3b is provided with a recessed operating hole 3c with a regular hexagonal cross section.

[0020] A check spring 4 and a cylindrical check cylinder 5 are installed inside the water passage cavity 1c. The check cylinder 5 can abut against the inner wall of the valve body 1 at the upper port of the water passage cavity 1c under the elastic force of the check spring 4, thus forming a seal between the check cylinder 5 and the inner wall of the valve body 1. Specifically, the outer side of the check cylinder 5 has a protruding annular protrusion 5b. An annular sealing ring 9 is provided at one end of the protrusion 5b facing the upper port of the water passage cavity 1c. The sealing ring 9 is fitted on the outer side of the check cylinder 5. The other end of the protrusion 5b has a recessed annular spring groove 5c. One end of the check spring 4 abuts against the bottom of the spring groove 5c, and the other end abuts against the upper end of the plug ring 3a. The protrusion 5b can press the sealing ring 9 tightly against the inner wall of the valve body 1 under the elastic force of the check spring 4.

[0021] The check cylinder 5 is equipped with a return spring 6 and a round rod-shaped return rod 7. The outer side of the upper end of the return rod 7 has an annular sealing part 7a. The lower end of the return rod 7 extends out of the check cylinder 5. The return rod 7 can move towards the lower port of the water passage cavity 1c under the elastic force of the return spring 6, and the sealing part 7a abuts against the inner wall of the check cylinder 5 to block the inner hole of the check cylinder 5. When the check cylinder 5 moves against the elastic force of the check spring 4, the lower end of the return rod 7 can abut against the upper end of the plug 3b. In this embodiment, the inner wall of the check cylinder 5 has a protruding annular shoulder 5a. The sealing part 7a is an annular sealing element that is sleeved and fixed on the outside of the return rod 7. It can abut against the upper side of the shoulder 5a and form a seal. The outer side of the lower end of the return rod 7 is threaded with a nut 8. The return spring 6 is sleeved on the outside of the return rod 7. One end of the return spring 6 abuts against the nut 8, and the other end of the return spring 6 abuts against the lower side of the shoulder 5a.

[0022] When this automatic flow balancing valve is connected to a pipeline, the pipeline can be controlled to open or close via the ball valve assembly 2. After the ball valve assembly 2 is opened, water flows into the valve body 1 from the inlet 1a. The water pressure acts on the check cylinder 5, causing the check cylinder 5 to move downward against the elastic force of the check spring 4. A gap is formed between the check cylinder 5 and the inner wall of the valve body 1 through which the water flows. The water can flow through this gap and the water passage 1d to the outlet 1b.

[0023] As the check cylinder 5 moves downward against the elastic force of the check spring 4, the return rod 7 inside the check cylinder 5 moves downward along with it until the lower end of the return rod 7 abuts against the plug 3. When the check cylinder 5 continues to move downward, the return rod 7 is blocked by the plug 3 and cannot move further downward. Then, the return rod 7 will overcome the elastic force of the return spring 6 and move upward relative to the check cylinder 5, releasing the sealing state between the two and making the inner hole of the check cylinder 5 open.

[0024] Because the lower end of the water passage chamber 1c is always connected to the outlet 1b through the water passage hole 1d, the water pressure at the lower end of the water passage chamber 1c is approximately the same as the water pressure at the outlet 1b. When the inlet water pressure decreases, while the water flows through the gap between the check cylinder 5 and the valve body 1 towards the outlet 1b, the water with higher pressure at the lower end of the water passage chamber 1c will flow back towards the inlet 1a through the inner hole of the check cylinder 5, replenishing the water flow at the inlet 1a, reducing the degree of water pressure drop at the inlet 1a, and mitigating the direct impact of water pressure fluctuations at the inlet 1a on the water pressure at the outlet 1b.

[0025] In addition, to facilitate the detection of the pressure difference across the water passage 1c, detection ports 1e are provided on the top of the valve body 1 between the water passage 1c and the inlet 1a, and on the side wall of the valve body 1 between the water passage 1c and the outlet 1b. Each detection port 1e is threaded with a tubular detection tube 12. The outer ends of both detection tubes 12 extend outside the valve body 1, and end caps 13 are detachably connected to the outer ends of both detection tubes 12. Here, the connection between the end caps 13 and the detection tubes 12 can be either threaded or tight-fitting.

[0026] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. An automatic flow balancing valve, comprising a valve body (1), wherein the valve body (1) has an inlet (1a) at its right end and an outlet (1b) at its left end, and a ball valve assembly (2) is provided at the inlet (1a) of the valve body (1), characterized in that, The valve body (1) has a cylindrical water passage cavity (1c) on the inner side of its bottom, and the axis of the water passage cavity (1c) is inclined relative to the horizontal direction. The upper port of the water passage cavity (1c) is connected to the water inlet (1a), and the lower port of the water passage cavity (1c) is opened to the bottom surface of the valve body (1). A plug (3) is sealed and connected to the lower port of the water passage cavity (1c) on the valve body (1). The side wall of the water passage cavity (1c) is connected to the water outlet (1b) through the water passage hole (1d). A check spring (4) and a cylindrical check cylinder (5) are provided in the water passage cavity (1c). The check cylinder (5) can abut against the upper port of the water passage cavity (1c) under the elastic force of the check spring (4). The valve body (1) is sealed on the inner wall of the valve body (1) and the check cylinder (5) and the inner wall of the valve body (1). The check cylinder (5) is provided with a return spring (6) and a round rod-shaped return rod (7). The outer side of the upper end of the return rod (7) has a circular sealing part (7a). The lower end of the return rod (7) passes through the check cylinder (5). The return rod (7) can move towards the lower port of the water passage cavity (1c) under the elastic force of the return spring (6) and make the sealing part (7a) abut against the inner wall of the check cylinder (5) to block the inner hole of the check cylinder (5). When the check cylinder (5) moves against the elastic force of the check spring (4), the lower end of the return rod (7) can abut against the plug (3).

2. The automatic flow balancing valve according to claim 1, characterized in that, The inner wall of the check cylinder (5) has a protruding annular shoulder (5a). The sealing part (7a) can abut against the upper side of the shoulder (5a) and form a seal. The outer side of the lower end of the return rod (7) is threaded with a nut (8). The return spring (6) is sleeved on the outer side of the return rod (7). One end of the return spring (6) abuts against the nut (8), and the other end of the return spring (6) abuts against the lower side of the shoulder (5a).

3. An automatic flow balancing valve according to claim 2, characterized in that, The outer side of the check cylinder (5) has a protruding annular protrusion (5b). One end of the protrusion (5b) facing the upper port of the water passage cavity (1c) is provided with an annular sealing ring (9). The other end of the protrusion (5b) is provided with a recessed annular spring groove (5c). One end of the check spring (4) abuts against the bottom of the spring groove (5c), and the other end abuts against the plug (3). The protrusion (5b) can press the sealing ring (9) tightly against the inner wall of the valve body (1) under the elastic force of the check spring (4).

4. An automatic flow balancing valve according to claim 3, characterized in that, The plug (3) includes a ring-shaped plug (3a) and a cylindrical plug (3b). The plug (3a) is threaded into the valve body (1). The other end of the check spring (4) abuts against the plug (3a). The plug (3b) is threaded into the plug (3a), and the upper end of the plug (3b) passes through the plug (3a) and extends into the water passage cavity (1c). The lower end of the return rod (7) abuts against the upper end of the plug (3b). The outer end of the plug (3b) is provided with a recessed operating hole (3c) with a regular hexagonal cross section.

5. An automatic flow balancing valve according to any one of claims 1 to 4, characterized in that, The valve body (1) is connected to a water outlet pipe (10) at the top, and the inlet of the water outlet pipe (10) is connected to the water outlet (1b). The water outlet pipe (10) is connected to an on / off valve assembly (11).

6. An automatic flow balancing valve according to any one of claims 1 to 4, characterized in that, Detection ports (1e) are provided on the top of the valve body (1) between the water passage cavity (1c) and the water inlet (1a) and on the side wall of the valve body (1) between the water passage cavity (1c) and the water outlet (1b). A tubular detection tube (12) is fixed in each of the two detection ports (1e). The outer ends of the two detection tubes (12) extend out of the valve body (1) and end caps (13) are detachably connected to the outer ends of the two detection tubes (12).

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