Adjustable dynamic flow balance valve

Abstract

The utility model discloses an adjustable dynamic flow balance valve, which comprises a valve body, a flow regulator, a pressure difference regulator and the like, and is mainly characterized in that a mounting cover extending into a water inlet cavity is arranged at the lower end of a regulating seat of the flow regulator, and a regulating valve clack is assembled in the mounting cover in a lifting and sealing manner, so that a regulating cavity is formed between the regulating valve clack and the mounting cover; an adjusting channel is further arranged in the valve rod and used for being communicated with the adjusting cavity, so that when the water through hole is sealed and opened and closed by the adjusting valve clack, the pressure above and below the adjusting valve clack can be adjusted to be equal all the time through the adjusting channel, sealing opening and closing of the adjusting valve clack can be achieved only by overcoming sealing force, the sealing process is labor-saving, and the sealing performance is more reliable. Meanwhile, the valve cover is designed at the bottom of the valve body, the vertical channel forming the pressure guiding channel is arranged in the valve body, the folded channel is arranged in the valve cover, and the vertical channel is located on the smooth section of the flow channel, so that impurity blockage can be reduced, scaling can be prevented, dredging and cleaning can be facilitated only by disassembling the valve cover, and the reliability of the valve structure is greatly improved.

Description

Technical Field

[0001] This utility model relates to a dynamic flow balancing valve in pipeline valves, specifically an adjustable dynamic flow balancing valve. Background Technology

[0002] A dynamic flow balancing valve is a pipeline valve that automatically changes its resistance coefficient according to changes in system operating conditions, thereby effectively controlling the flow rate to maintain a constant value within a certain pressure differential range. Currently, dynamic flow balancing valves are widely used in air conditioning, HVAC, and heating systems, primarily to prevent uneven heating and cooling between areas. Its structure typically consists of a valve body, a flow regulator, and a differential pressure regulator. The flow regulator is sealed and mounted on top of the valve body via an adjusting seat. The valve body has an inlet and an outlet end, respectively. The valve body contains a water passage connecting the inlet and outlet ends, as well as an inlet chamber and an outlet chamber separated by the water passage. The inlet chamber connects to the inlet end, and the outlet chamber connects to the outlet end. A regulating valve disc is located in the inlet chamber, driven by a valve stem installed within the flow regulator to seal and close the water passage. The differential pressure regulator is installed in the outlet chamber. However, in actual use, it was found that the regulating valve disc of this adjustable dynamic flow balancing valve is merely a shut-off component. During the sealing and opening / closing process with the water inlet, the opening and closing of this regulating valve disc is often affected by the medium pressure. Therefore, during operation, it is necessary to overcome not only the sealing force but also the medium pressure to achieve the sealing action, making the sealing process quite laborious and affecting the valve's sealing performance. At the same time, the inlet end is directly connected to the balancing chamber formed by the differential pressure regulator through a guide channel to achieve dynamic balance. This guide channel is usually an oblique hole designed in the valve body and facing the inlet end flow direction. Since the water quality for heating is relatively poor, impurities mixed in the hot water can easily enter this guide channel and cause blockage, thereby leading to valve failure and affecting the valve's structural reliability. Utility Model Content

[0003] The technical problem to be solved by this utility model is to overcome the defects of the prior art and provide an adjustable dynamic flow balancing valve that is labor-saving in the sealing process, has excellent sealing performance, and has a reliable structure.

[0004] The technical problem of this utility model is solved by the following technical solution:

[0005] An adjustable dynamic flow balancing valve includes a valve body, a flow regulator, and a differential pressure regulator. The flow regulator is sealed and installed on the top of the valve body via an adjusting seat. The valve body has an inlet end and an outlet end at both ends. The valve body contains a water passage connecting the inlet end and the outlet end, and an inlet chamber and an outlet chamber separated by the water passage. The inlet chamber connects to the inlet end, and the outlet chamber connects to the outlet end. An adjusting valve disc is installed in the inlet chamber. This adjusting valve disc is driven by a valve stem installed in the flow regulator and seals and opens / closes the water passage. The differential pressure regulator is installed in the outlet chamber. The lower end of the adjusting seat has a mounting cover extending into the inlet chamber. The adjusting valve disc is fitted with a lifting and sealing mechanism within the mounting cover, forming an adjusting chamber between the adjusting valve disc and the mounting cover. An adjusting channel is provided within the valve stem. The upper end of the adjusting channel connects to the adjusting chamber, and the lower end of the adjusting channel directly penetrates the lower end of the valve stem and the adjusting valve disc. During the process of the adjusting valve disc sealing and opening / closing the water passage, the adjusting channel regulates the pressure above and below the adjusting valve disc to remain equal.

[0006] The differential pressure regulator includes a diaphragm disposed in the outlet chamber. The inner circumference of the diaphragm is sealed and fixed to the balance valve disc, and the outer circumference of the diaphragm is sealed and fixed to the valve body, forming a balance chamber below the diaphragm. The outlet chamber is provided with a balance spring that elastically pushes the balance valve disc downward. The balance chamber is directly connected to the inlet end via a pressure guiding channel. The pressure guiding channel guides the inlet water pressure at the inlet end into the balance chamber and works with the balance spring to dynamically balance the lifting and lowering movement of the balance valve disc.

[0007] The valve body has a valve cover at the bottom that is sealed and installed, and the valve cover abuts against the outer circumference of the fixed diaphragm, thereby forming a balance cavity between the diaphragm and the valve cover.

[0008] The pressure guiding channel is composed of a vertical channel set in the valve body and a folded channel set in the valve cover; the upper end of the vertical channel is directly connected to the inlet end, and the lower end of the vertical channel passes through the bottom of the valve body; one end of the folded channel is obliquely connected to the balance chamber, and the other end of the folded channel passes through the top of the valve cover, and the other end of the folded channel is sealed and connected to the lower end of the vertical channel by the sealing installation of the valve cover at the bottom of the valve body.

[0009] The water outlet chamber is equipped with a flow guide sleeve that covers the water passage hole, and the two ends of the balance spring are elastically pushed and installed on the flow guide sleeve and the balance valve disc, respectively.

[0010] The water outlet chamber is equipped with a sealed diaphragm seat, and the valve cover abuts the outer circumference of the diaphragm against the lower end of the diaphragm seat to form a fixed installation; the balance valve disc is dynamically mounted in the diaphragm seat and adjusts the water flow rate from the water outlet chamber to the outlet end.

[0011] The flow regulator includes an adjusting seat sealed on the top of the valve body, a handwheel rotating on the top of the adjusting seat, and an adjusting cylinder threaded into the handwheel. The valve stem is vertically installed inside the adjusting cylinder, with its upper end passing through the upper end of the adjusting cylinder and its lower end connected to the adjusting valve disc inside the mounting cover. An adjusting spring is provided outside the valve stem, and the adjusting spring elastically pushes the valve stem upward.

[0012] The regulating cylinder is driven by the rotation of the handwheel to move up and down; when the regulating cylinder moves downward, it compresses the regulating spring and drives the valve stem to move downward, thereby pushing the regulating valve disc to move downward synchronously to seal and close the water passage; when the regulating cylinder moves upward, the regulating spring releases its potential energy and elastically pushes the valve stem upward, thereby pushing the regulating valve disc to move upward synchronously to open the water passage.

[0013] The adjustment seat has a scale dial on top and a scale observation window on the side.

[0014] The valve cover is provided with a support foot at the bottom.

[0015] Compared with the prior art, the main feature of this utility model is that the lower end of the regulating seat of the flow regulator is provided with a mounting cover that extends into the water inlet chamber, and the regulating valve disc is fitted into the mounting cover for lifting and sealing, thereby forming a regulating cavity between the regulating valve disc and the mounting cover. A regulating channel is also provided in the valve stem, with the upper end of the regulating channel connecting to the regulating cavity and the lower end of the regulating channel directly penetrating the lower end of the valve stem and the regulating valve disc. Therefore, during the process of the regulating valve disc sealing and opening / closing the water passage, the regulating channel can be used to regulate the pressure above and below the regulating valve disc to always be equal, thereby reducing the influence of the medium pressure on the regulating valve disc during opening and closing. In other words, only... Overcoming the sealing force enables the valve disc to open and close, making the sealing process less strenuous and the sealing performance more reliable. Simultaneously, the innovative design of the valve cover at the bottom of the valve body, with the pressure guiding channel consisting of a vertical channel within the valve body and a folded channel within the valve cover, places the vertical channel in the smooth section of the flow path, no longer directly facing the inlet flow direction. This prevents impurities from entering or accumulating, reducing blockage and preventing scaling. Even if the pressure guiding channel becomes blocked, simply removing the valve cover and separating the vertical and folded channels allows for easy unblocking and cleaning, greatly improving the reliability of the valve structure. Attached Figure Description

[0016] Figure 1 This is a cross-sectional structural diagram of the present invention.

[0017] Figure 2 This is a schematic diagram showing the water flow state inside the valve after the regulating valve disc is opened.

[0018] Figure 3 for Figure 1 A three-dimensional image.

[0019] Figure 4 This is a schematic diagram of the flow regulator. Detailed Implementation

[0020] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0021] like Figures 1-4 As shown, 1. Valve body, 11. Inlet end, 12. Outlet end, 13. Inlet chamber, 14. Outlet chamber, 15. Water passage hole, 16. Adjustment chamber, 17. Balance chamber, 18. Pressure guiding channel, 181. Vertical channel, 182. Bending channel, 2. Flow regulator, 21. Adjustment seat, 211. Mounting cover, 212. Dial, 213. Scale observation window, 22. Handwheel, 23. Adjustment cylinder, 24. Valve stem, 241. Adjustment channel, 25. Adjustment spring, 26. Spring seat, 27. Adjustment valve disc, 3. Differential pressure regulator, 31. Diaphragm, 32. Balance valve disc, 33. Balance spring, 34. Diaphragm seat, 4. Valve cover, 41. Support foot, 5. Guide sleeve.

[0022] An adjustable dynamic flow balancing valve, such as Figures 1-3 As shown, it can be widely used in air conditioning, HVAC and heating systems, and plays a role in preventing uneven heating and cooling in different areas. Its structure includes valve body 1, flow regulator 2 and differential pressure regulator 3, etc.

[0023] The valve body 1 is provided with an inlet end 11 and an outlet end 12 at both ends, that is... Figure 1 The view shown has the inlet end 11 on the right and the outlet end 12 on the left. The inlet end 11 and the outlet end 12 are on the same axis and are arranged at an angle.

[0024] The valve body 1 is provided with a water passage hole 15 that connects the inlet end 11 and the outlet end 12. The water passage hole is a circular hole with its axis perpendicular to the horizontal plane. Therefore, the axis of the water passage hole 15 intersects with the same axis of the inlet end 11 and the outlet end 12.

[0025] Furthermore, the water passage 15 also divides the valve body 1 into an inlet chamber 13 and an outlet chamber 14, with the inlet chamber connected to the inlet end 11 and the outlet chamber connected to the outlet end 12.

[0026] The flow regulator 2 includes an adjustment seat 21 with a vertical sleeve-shaped structure. The bottom of the adjustment seat is screwed on and sealed with an O-ring in the mounting port at the top of the valve body 1. In fact, the flow regulator 2 is sealed and installed on the top of the valve body 1 through the adjustment seat 21. The top of the adjustment seat 21 is provided with a self-rotating handwheel 22, and there is a threaded adjustment cylinder 23 in the handwheel. The lower outer circumferential surface of the adjustment cylinder and the inner circumferential surface of the adjustment seat are usually provided with guide ribs and guide grooves and other guide structures to guide the lifting and lowering. Therefore, the rotation of the handwheel 22 can drive the adjustment cylinder 23 to achieve lifting and lowering movement. That is, the rotation of the adjustment cylinder 23 is converted into lifting and lowering movement within the handwheel 22 by the guidance of the guide structure.

[0027] The lower end of the adjusting seat 21 is provided with a mounting cover 211 that extends coaxially into the water inlet cavity 13; the water inlet cavity 13 is provided with an adjusting valve disc 27, which is fitted with the adjusting valve disc lifting and sealing inside the mounting cover 211. Therefore, the outer circumference of the adjusting valve disc 27 needs to be provided with a fitted O-ring to form a dynamic seal, and an adjusting cavity 16 is formed between the adjusting valve disc 27 and the mounting cover 211.

[0028] The regulating cylinder 23 is provided with a vertically installed valve stem 24. The upper end of the valve stem passes through the upper end of the regulating cylinder 23, and the lower end of the valve stem is connected to the regulating valve disc 27 in the mounting cover 211. Specifically, the regulating valve disc is provided with an axially penetrating valve disc hole, and the lower end of the valve stem 24 is connected to the valve disc hole to form a fixed structure.

[0029] Meanwhile, an adjusting spring 25 is fitted around the valve stem 24. The upper end of the adjusting spring elastically pushes against the outer shoulder of the valve stem 24, and the outer shoulder abuts against the adjusting cylinder 23. The lower end of the adjusting spring elastically pushes against the spring seat 26, which is fixed inside the adjusting seat 21. Therefore, under normal conditions, the valve stem 24 always has an upward tendency due to the elastic push of the adjusting spring 25.

[0030] In this way, the regulating cylinder 23 is driven by the rotation of the handwheel 22 to move up and down; when the regulating cylinder 23 moves downward, it compresses the regulating spring 25 and drives the valve stem 24 to move downward, which in turn pushes the regulating valve disc 27 to move downward synchronously and seals the water passage 15; when the regulating cylinder 23 moves upward, the regulating spring 25 releases its potential energy and elastically pushes the valve stem 24 upward, which in turn pushes the regulating valve disc 27 to move upward synchronously and opens the water passage 15. That is to say, the Kv value of the flow regulator 2 can be adjusted by rotating the handwheel 22.

[0031] Furthermore, the top of the adjustment seat 21 is provided with a scale 212, and the side of the adjustment seat is provided with a scale observation window 213. These structural designs are used to assist the handwheel in achieving precise adjustment.

[0032] The valve stem 24 is provided with an adjustment channel 241, which extends along the axis of the valve stem. The upper end of the adjustment channel 241 passes through the side of the valve stem and connects to the adjustment cavity 16. The lower end of the adjustment channel 241 directly passes through the lower end of the valve stem 24 and the valve disc hole of the regulating valve disc 27. Therefore, during the process of the regulating valve disc sealing and opening / closing the water passage 15, the pressure above and below the regulating valve disc 27 can be adjusted by the adjustment channel 241 to always be equal, thereby reducing the influence of the medium pressure on the regulating valve disc 27 when it is opened and closed. In other words, the sealing and opening / closing of the regulating valve disc 27 can be achieved by overcoming the sealing force, making the sealing process more labor-saving and the sealing performance more reliable.

[0033] The differential pressure regulator 3 is installed in the outlet chamber 14. The differential pressure regulator 3 includes a diaphragm 31 disposed in the outlet chamber. The inner circumference of the diaphragm is sealed and fixed on the balance valve disc 32, and the outer circumference of the diaphragm is sealed and fixed in the valve body 1. Specifically, the outlet chamber 14 is provided with a diaphragm seat 34 installed by sealing with an O-ring. The diaphragm seat is a cylindrical sleeve-shaped component. The bottom of the valve body 1 is provided with a valve cover 4 that is detachably sealed and installed by four bolts. The valve cover 4, after installation, presses the outer circumference of the diaphragm 31 against the lower end of the diaphragm seat 34 to form a fixed installation, thereby forming a balance chamber 17 between the diaphragm 31 and the valve cover 4.

[0034] The balance valve disc 32 is mounted in the diaphragm seat 34 and can adjust the water flow rate from the outlet chamber 14 to the outlet end 12.

[0035] The water outlet chamber 14 is equipped with a balance spring 33 that elastically pushes the balance valve disc 32 downward. Specifically, the water outlet chamber 14 is equipped with a flow guide sleeve 5 that covers the water passage hole 15, and the two ends of the balance spring 33 are elastically pushed and installed on the flow guide sleeve 5 and the balance valve disc 32, respectively.

[0036] The balance chamber 17 is directly connected to the inlet end 11 via the pressure guiding channel 18. Therefore, the pressure guiding channel 18 guides the water pressure at the inlet end 11 into the balance chamber 17, which can work with the balance spring 33 to dynamically balance the lifting and lowering movement of the balance valve disc 32.

[0037] The pressure guiding channel 18 is composed of a vertical channel 181 disposed in the valve body 1 and a folded channel 182 disposed in the valve cover 4; the upper end of the vertical channel 181 is directly connected to the inlet end 11, and the lower end of the vertical channel is penetrated through the bottom of the valve body 1; one end of the folded channel 182 is obliquely connected to the balance chamber 17, and the other end of the folded channel is penetrated through the top of the valve cover 4, and the other end of the folded channel 182 is sealed and connected to the lower end of the vertical channel 181 through a sealing gasket due to the sealing installation of the valve cover 4 at the bottom of the valve body 1.

[0038] Obviously, the valve cover 4 is creatively designed at the bottom of the valve body 1, and the pressure guiding channel 18 is composed of a vertical channel 181 set in the valve body 1 and a folded channel 182 set in the valve cover 4. Moreover, the vertical channel 181 is located in the smooth section of the flow channel and is no longer directly facing the inflow direction of the inlet end 11. Therefore, impurities are not easy to enter or accumulate, reducing impurity blockage and preventing scale. Even if the pressure guiding channel 181 is blocked, it is easy to clean and unblock it by simply removing the valve cover 4 and separating the vertical channel 181 and the folded channel 182, thereby greatly improving the reliability of the valve structure.

[0039] The valve cover 4 has several support feet 41 at its bottom, which can be used to support the adjustable dynamic flow balance valve and make it stable for operation.

[0040] The working process of this utility model is as follows: Figure 2 As shown, the water supply pressure entering from the inlet 11 is P1. The pressure of the medium entering the outlet chamber 14 through the open regulating valve 27 and water passage 15 decreases to P2. After passing through the differential pressure regulator 3, the medium pressure at the outlet 12 becomes P3. At this time, through the balance between the differential pressure and the internal spring tension, the differential pressure regulator 3 can dynamically control the differential pressure ∆P(P1-P2) between the upper and lower parts of the flow regulator 2 to remain constant. If P1-P3 increases, the balancing valve 32 of the differential pressure regulator 3 moves upward, reducing the water flow through the outlet 12 and maintaining a stable (P1-P2). In this case, the flow rate remains unchanged.

[0041] The above description is only a specific embodiment of this utility model. Those skilled in the art should understand that any structural design equivalent to this embodiment should be included within the protection scope of this utility model.

Claims

1. An adjustable dynamic flow balancing valve, comprising a valve body (1), a flow regulator (2), and a differential pressure regulator (3); the flow regulator (2) is sealed and installed on the top of the valve body (1) via an adjusting seat (21); the valve body (1) has an inlet end (11) and an outlet end (12) at both ends, and the valve body (1) has a water passage hole (15) connecting the inlet end (11) and the outlet end (12), and an inlet chamber (13) and an outlet chamber (14) formed by the water passage hole, the inlet chamber connecting the inlet end (11) and the outlet chamber connecting the outlet end (12); the inlet chamber (13) is provided with an adjusting valve disc (27), the adjusting valve disc being driven by a valve rod (24) installed in the flow regulator (2) and sealingly opening and closing the water passage hole (15); the differential pressure regulator (3) is installed in the outlet chamber (14), characterized in that The lower end of the regulating seat (21) is provided with a mounting cover (211) that extends into the water inlet chamber (13). The regulating valve disc (27) is fitted with a lifting and sealing mechanism inside the mounting cover (211), and a regulating cavity (16) is formed between the regulating valve disc (27) and the mounting cover (211). The valve stem (24) is provided with a regulating channel (241). The upper end of the regulating channel is connected to the regulating cavity (16), and the lower end of the regulating channel directly passes through the lower end of the valve stem (24) and the regulating valve disc (27). During the process of the regulating valve disc sealing and opening and closing the water passage (15), the regulating channel (241) is used to regulate the pressure of the regulating valve disc (27) to always be equal.

2. The adjustable dynamic flow balancing valve according to claim 1, characterized in that... The differential pressure regulator (3) includes a diaphragm (31) disposed in the outlet chamber (14). The inner circumference of the diaphragm is sealed and fixed on the balance valve disc (32), and the outer circumference of the diaphragm is sealed and fixed in the valve body (1), forming a balance chamber (17) below the diaphragm. The outlet chamber (14) is provided with a balance spring (33) that elastically pushes the balance valve disc (32) downward. The balance chamber (17) is directly connected to the inlet end (11) through a pressure guiding channel (18). The pressure guiding channel (18) guides the inlet water pressure of the inlet end (11) into the balance chamber (17) and works with the balance spring (33) to dynamically balance the lifting and lowering movement of the balance valve disc (32).

3. The adjustable dynamic flow balancing valve according to claim 2, characterized in that... The valve body (1) has a valve cover (4) at the bottom that is sealed and installed, and the valve cover abuts against the outer circumference of the fixed diaphragm (31), thereby forming a balance cavity (17) between the diaphragm (31) and the valve cover (4).

4. An adjustable dynamic flow balancing valve according to claim 3, characterized in that... The pressure guiding channel (18) is composed of a vertical channel (181) in the valve body (1) and a folded channel (182) in the valve cover (4); the upper end of the vertical channel (181) is directly connected to the inlet end (11), and the lower end of the vertical channel (181) is penetrated by the bottom of the valve body (1); one end of the folded channel (182) is obliquely connected to the balance chamber (17), and the other end of the folded channel (182) is penetrated by the top of the valve cover (4), and the other end of the folded channel (182) is sealed and connected to the lower end of the vertical channel (181) by the sealing installation of the valve cover (4) at the bottom of the valve body (1).

5. An adjustable dynamic flow balancing valve according to claim 2, characterized in that... The water outlet cavity (14) is provided with a guide sleeve (5) covering the water passage hole (15), and the two ends of the balance spring (33) are elastically pushed and installed on the guide sleeve (5) and the balance valve disc (32) respectively.

6. An adjustable dynamic flow balancing valve according to claim 3, characterized in that... The water outlet chamber (14) is provided with a sealed diaphragm seat (34), and the valve cover (4) abuts the outer circumference of the diaphragm (31) against the lower end of the diaphragm seat (34) to form a fixed installation; the balance valve disc (32) is mounted in the diaphragm seat (34) and adjusts the water flow from the water outlet chamber (14) to the outlet end (12).

7. An adjustable dynamic flow balancing valve according to claim 1, characterized in that... The flow regulator (2) includes an adjustment seat (21) sealed on the top of the valve body (1), a handwheel (22) rotating on the top of the adjustment seat, and an adjustment cylinder (23) threaded in the handwheel. The valve stem (24) is vertically installed in the adjustment cylinder (23). The upper end of the valve stem passes through the upper end of the adjustment cylinder, and the lower end of the valve stem is connected to the adjustment valve disc (27) in the mounting cover (211). An adjustment spring (25) is provided outside the valve stem (24), and the adjustment spring elastically pushes the valve stem (24) upward.

8. An adjustable dynamic flow balancing valve according to claim 7, characterized in that... The regulating cylinder (23) is driven by the rotation of the handwheel (22) to move up and down; when the regulating cylinder (23) moves down, it compresses the regulating spring (25) and drives the valve stem (24) to move down, thereby pushing the regulating valve disc (27) to move down synchronously to seal and close the water passage (15); when the regulating cylinder (23) moves up, the regulating spring (25) releases potential energy and elastically pushes the valve stem (24) to move up, thereby pushing the regulating valve disc (27) to move up synchronously to open the water passage (15).

9. An adjustable dynamic flow balancing valve according to claim 1, characterized in that... The adjustment seat (21) is provided with a scale (212) on the top and a scale observation window (213) on the side.

10. An adjustable dynamic flow balancing valve according to claim 3, characterized in that... The valve cover (4) is provided with a support foot (41) at the bottom.

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