Static balance valve

Abstract

The utility model belongs to the technical field of valves, and particularly relates to a static balance valve, which comprises a valve body and a valve cover, a water inlet and a water outlet are arranged on the valve body, a valve seat is arranged in the valve body, a valve port is arranged on the valve seat, a valve rod is rotatably arranged in the valve body, one end of the valve rod extends out of the valve cover, and the other end of the valve rod is connected with a water stop plate component for adjusting the opening degree of the valve port. The water stop plate assembly comprises an adjusting rod, a water stop plate and a plug cap are arranged at the other end of the adjusting rod, the plug cap is in a circular truncated cone shape, the diameter of the plug cap is gradually increased from the end away from the valve rod to the end close to the valve rod, the adjusting rod comprises a connecting section and a mounting section, the mounting section is sleeved with the water stop plate and the plug cap, and a mounting boss is arranged on the mounting section. A limiting protruding edge is formed at the end, away from the connecting section, of the mounting section through stamping locking, the water stop plate is limited between the mounting boss and the plug cap, and the plug cap is limited between the water stop plate and the limiting protruding edge. According to the utility model, the flow of the valve port can be linearly adjusted, the flow can be accurately controlled, and the flow control precision is high.

Description

Technical fields:

[0001] This utility model belongs to the field of valve technology, and specifically refers to a static balancing valve. Background technology:

[0002] A static balancing valve adjusts the flow rate by changing the gap (opening) between the valve core and the valve seat, thereby altering the flow resistance. It acts on the system resistance. The static balancing valve can distribute new water volume in a balanced manner according to the design calculation ratio. Each branch downstream of the valve increases or decreases proportionally, still meeting the flow demand of part of the load under the current climate conditions, thus playing a role in thermal balance.

[0003] Chinese utility model patent (publication number CN202708258U, application date 2012.08.04, publication date 2013.01.30) discloses a digital balancing valve with filter, including a valve body, a valve cover, a valve plug, and a valve stem. The valve body has an inlet and an outlet along the axial direction. A valve seat is provided in the valve body at the junction of the inlet and outlet, and a valve port for the flow of medium is provided on the valve seat. The valve stem is rotatably disposed in the valve body, with one end extending out of the valve cover and connected to an opening adjustment device. The valve plug is movably screwed to the free end of the valve stem in the valve body and is disposed on the valve port of the valve seat in the valve body, which can move up and down with the rotation of the valve stem. Pressure measuring valves are also provided on the side walls of the valve body near the inlet and outlet, respectively. During operation, adjusting the opening adjustment device drives the valve stem to rotate, thereby driving the valve plug to move up and down to control the opening between the valve plug and the valve seat, so as to adjust the flow rate to control the room temperature.

[0004] The drawback of the aforementioned balancing valve is that the valve plug cannot achieve linear adjustment and the opening degree cannot be precisely controlled. Summary of the Invention:

[0005] The purpose of this invention is to provide a static balancing valve that can linearly regulate the flow rate at the valve orifice, enabling precise flow control with high accuracy.

[0006] This utility model is implemented as follows:

[0007] A static balancing valve includes a valve body and a valve cover. The valve body has an inlet and an outlet. A valve seat is located adjacent to the inlet and outlet within the valve body. The valve seat has a valve port connecting the inlet and outlet. A valve stem is rotatably mounted within the valve body. One end of the valve stem extends out of the valve cover, and the other end of the valve stem is connected to a stop plate assembly for adjusting the valve port opening. The valve port is a circular hole. The stop plate assembly includes an adjusting rod connected to the valve stem at one end, and a stop plate that abuts against the valve seat to seal the valve port and a sliding mechanism at the other end. The plug inside the valve port has a water-stop plate located on the side of the plug closer to the valve stem. The plug is frustum-shaped with a diameter that gradually increases from the end furthest from the valve stem to the end closest to the valve stem. The adjusting rod includes a connecting section and an installation section. The connecting section connects to the valve stem. The water-stop plate and the plug are both fitted onto the installation section. The installation section has an installation boss. The end of the installation section furthest from the connecting section forms a limiting flange through a stamped locking hole. The water-stop plate is limited between the installation boss and the plug, and the plug is limited between the water-stop plate and the limiting flange.

[0008] In the aforementioned static balancing valve, the valve seat is provided with an annular boss for sealing against a waterstop plate.

[0009] In the aforementioned static balancing valve, the cross-section of the annular boss is semi-circular.

[0010] In the aforementioned static balancing valve, the end face of the mounting boss near the waterstop plate is recessed to form a mounting groove, and the waterstop plate is disposed within the mounting groove.

[0011] In the aforementioned static balancing valve, one end of the connecting section is screwed onto the valve cover, and one end of the valve stem is connected to the connecting section as a hexagonal shaft. The connecting section is provided with a hexagonal hole that matches the hexagonal shaft, and the valve stem drives the connecting section to rotate through the hexagonal shaft and the hexagonal hole.

[0012] In the aforementioned static balancing valve, the valve cover has a limiting boss at the end away from the valve body, and the valve stem has a retaining spring and a limiting step, with the limiting boss positioned between the retaining spring and the limiting step.

[0013] In the aforementioned static balancing valve, an O-ring is provided between the limiting step and the valve cover, with the O-ring fitted on the limiting step.

[0014] In one of the static balancing valves described above, one end of the valve stem extends out of the valve cover and connects to the handwheel.

[0015] In the aforementioned static balancing valve, the valve body is provided with two test holes, one of which is connected to the inlet and the other to the outlet. Each of the two test holes is provided with a pressure testing connector assembly, and the outer circle of the pressure testing connector assembly is provided with a hexagonal surface.

[0016] The outstanding advantages of this utility model compared to the prior art are:

[0017] 1. This utility model achieves linear flow regulation of the valve port by sealing and opening the valve port with a water-stop plate, and the truncated cone-shaped plug cap slides inside the valve port, enabling precise flow control with high accuracy. Furthermore, at the end of the installation section away from the connection section, a limiting flange is formed by a stamped locking hole, which limits the plug cap between the water-stop plate and the limiting flange. The structure is sturdy and reliable, effectively preventing the plug cap from falling off, and the operation is simple and convenient.

[0018] 2. The valve seat of this utility model is provided with an annular boss for sealing against the waterstop plate, which effectively improves the sealing performance between the waterstop plate and the valve seat.

[0019] 3. The outer circle of the pressure testing connector assembly of this utility model is provided with a hexagonal surface, which makes it easier to disassemble and assemble the pressure testing connector assembly, making it more convenient. Attached image description:

[0020] Figure 1 This is a perspective view of the present invention;

[0021] Figure 2 This is a cross-sectional view of the present invention;

[0022] Figure 3 yes Figure 2 Enlarged view of point A;

[0023] Figure 4 This is a partial sectional view of the adjusting rod of this utility model without the locking seam.

[0024] Reference numerals in the attached drawings: 1. Valve body; 2. Valve cover; 3. Inlet; 4. Outlet; 5. Valve seat; 6. Valve port; 7. Valve stem; 8. Adjusting rod; 8a. Connecting section; 8b. Mounting section; 8c. Mounting boss; 9. Water stop plate; 10. Plug cap; 11. Annular boss; 12. Hexagonal hole; 13. Limiting boss; 14. Snap ring; 15. Limiting step; 16. Handwheel; 17. Pressure testing connector assembly; 18. Hexagonal surface; 19. Blind hole; 20. Limiting flange. Detailed implementation method:

[0025] The present invention will be further described below with reference to specific embodiments. See also: Figure 1 —4:

[0026] A static balancing valve includes a valve body 1 and a valve cover 2. The valve body 1 has an inlet 3 and an outlet 4. A valve seat 5 is located inside the valve body 1 at the junction of the inlet 3 and the outlet 4. The valve seat 5 has a valve port 6 connecting the inlet 3 and the outlet 4. A valve stem 7 is rotatably mounted inside the valve body 1. One end of the valve stem 7 extends out of the valve cover 2, and the other end of the valve stem 7 is connected to a waterstop plate assembly for adjusting the opening of the valve port 6. The valve port 6 is a circular hole. The waterstop plate assembly includes an adjusting rod 8 connected to the valve stem 7 at one end, and a waterstop plate 9 that abuts against the valve seat 5 to seal the valve port 6 and a plug cap 1 that slides inside the valve port 6 at the other end of the adjusting rod 8. 0. The waterstop plate 9 is located on the side of the plug cap 10 near the valve stem 7. The plug cap 10 is frustum-shaped, and its diameter gradually increases from the end away from the valve stem 7 to the end near the valve stem 7. The adjusting rod 8 includes a connecting section 8a and an installation section 8b. The connecting section 8a connects to the valve stem 7. The waterstop plate 9 and the plug cap 10 are both fitted onto the installation section 8b. The installation section 8b is provided with an installation boss 8c. The end of the installation section 8b away from the connecting section 8a forms a limiting flange 20 through a stamped locking hole. The waterstop plate 9 is limited between the installation boss 8c and the plug cap 10, and the plug cap 10 is limited between the waterstop plate 9 and the limiting flange 20.

[0027] The working principle of this utility model is as follows: Figure 1-4 As shown, rotating the valve stem 7 causes the water-stop plate assembly to move within the valve body 1, and the water-stop plate 9 and the plug cap 10 regulate the flow rate of the valve port 6.

[0028] This invention uses a water-stop plate 9 to seal and open the valve port 6. The frustum-shaped plug 10 slides within the valve port 6 to linearly regulate the flow rate of the valve port 6, enabling precise flow control with high accuracy. Furthermore, at the end of the installation section 8b away from the connecting section 8a, a limiting flange 20 is formed by a stamped locking seam, which limits the plug 10 between the water-stop plate 9 and the limiting flange 20. The structure is robust and reliable, effectively preventing the plug from falling off, and the operation is simple and convenient.

[0029] The process flow of stamping the lock is as follows: First, a blind hole 19 is machined at the end of the mounting section 8b away from the connecting section 8a. Then, the side wall of the blind hole 19 is bent outward by stamping to form a limiting flange 20.

[0030] To improve the sealing performance between the waterstop plate 9 and the valve seat 5, such as Figure 2 , 3 As shown, the valve seat 5 is provided with an annular boss 11 for sealing against the waterstop plate 9.

[0031] Furthermore, the cross-section of the annular boss 11 is semi-circular.

[0032] To limit the movement of the waterstop 9 and prevent it from shaking and causing noise due to water flow impact, such as Figure 2As shown, the mounting boss 8c has an indented mounting groove on its end face near the waterstop plate 9, and the waterstop plate 9 is disposed in the mounting groove.

[0033] The mounting structure of adjusting rod 8 is as follows: Figure 2 , 4 As shown, one end of the connecting section 8a is screwed onto the valve cover 2, and the end of the valve stem 7 connected to the connecting section 8a is a hexagonal shaft. The connecting section 8a is provided with a hexagonal hole 12 that matches the hexagonal shaft. The valve stem 7 drives the connecting section 8a to rotate through the hexagonal shaft and the hexagonal hole 12. The structure is simple and easy to process and install. Rotating the valve stem 7 drives the adjusting rod 8 to rotate. Since the connecting section 8a is screwed onto the valve cover 2, the adjusting rod 8 will have axial displacement relative to the valve cover 2 during rotation.

[0034] The axial limiting structure of valve stem 7: as follows Figure 2 As shown, the valve cover 2 is provided with a limiting boss 13 at the end away from the valve body 1, and the valve stem 7 is provided with a retaining spring 14 and a limiting step 15. The limiting boss 13 is engaged between the retaining spring 14 and the limiting step 15.

[0035] In order to seal the gap between the limiting step 15 and the valve cover 2 and prevent water leakage, an O-ring is provided between the limiting step 15 and the valve cover 2, and the O-ring is fitted on the limiting step 15.

[0036] To facilitate the rotation of the valve stem 7, one end of the valve stem 7 extends out of the valve cover 2 and connects to the handwheel 16.

[0037] Furthermore, the valve body 1 is provided with two test holes, one of which is connected to the inlet 3 and the other is connected to the outlet 4. Each of the two test holes is provided with a pressure testing connector assembly 17. The outer circle of the pressure testing connector assembly 17 is provided with a hexagonal surface 18, which facilitates the disassembly and assembly of the pressure testing connector assembly 17 and makes it more convenient.

[0038] The above embodiments are only one of the preferred embodiments of this utility model and are not intended to limit the scope of implementation of this utility model. Therefore, all equivalent changes made in accordance with the shape, structure and principle of this utility model should be covered within the protection scope of this utility model.

Claims

1. A static balancing valve, comprising a valve body (1) and a valve cover (2), wherein the valve body (1) is provided with an inlet (3) and an outlet (4), a valve seat (5) is provided inside the valve body (1) at the junction of the inlet (3) and the outlet (4), the valve seat (5) is provided with a valve port (6) connecting the inlet (3) and the outlet (4), and a valve stem (7) is rotatably provided inside the valve body (1), one end of the valve stem (7) extending out of the valve cover (2), characterized in that: The valve stem (7) is connected at the other end to a waterstop plate assembly that adjusts the opening of the valve port (6). The valve port (6) is a round hole. The waterstop plate assembly includes an adjusting rod (8) connected to the valve stem (7) at one end. The other end of the adjusting rod (8) is provided with a waterstop plate (9) that abuts against the valve seat (5) to seal the valve port (6) and a plug cap (10) that slides in the valve port (6). The waterstop plate (9) is located on the side of the plug cap (10) closer to the valve stem (7). The plug cap (10) is frustoconical, and its diameter gradually increases from the end away from the valve stem (7) to the end closer to the valve stem (7). The adjusting rod (8) includes a connecting section (8a) and an installation section (8b). The connecting section (8a) connects to the valve stem (7). The water-stop plate (9) and the plug cap (10) are both fitted on the installation section (8b). The installation section (8b) is provided with an installation boss (8c). The end of the installation section (8b) away from the connecting section (8a) forms a limiting flange (20) through a stamping lock. The water-stop plate (9) is limited between the installation boss (8c) and the plug cap (10). The plug cap (10) is limited between the water-stop plate (9) and the limiting flange (20).

2. A static balancing valve according to claim 1, characterized in that: The valve seat (5) is provided with an annular boss (11) for sealing against the water stop plate (9).

3. A static balancing valve according to claim 2, characterized in that: The cross-section of the annular boss (11) is semi-circular.

4. A static balancing valve according to claim 1, characterized in that: The mounting boss (8c) has an indented mounting groove on the end face near the waterstop plate (9), and the waterstop plate (9) is set in the mounting groove.

5. A static balancing valve according to claim 1, characterized in that: The connecting section (8a) is screwed to one end of the valve stem (7) onto the valve cover (2). The valve stem (7) is connected to the connecting section (8a) at one end, which is a hexagonal shaft. The connecting section (8a) is provided with a hexagonal hole (12) that is compatible with the hexagonal shaft. The valve stem (7) drives the connecting section (8a) to rotate through the hexagonal shaft and the hexagonal hole (12).

6. A static balancing valve according to claim 5, characterized in that: The valve cover (2) is provided with a limiting boss (13) at the end away from the valve body (1), and the valve stem (7) is provided with a retaining ring (14) and a limiting step (15). The limiting boss (13) is engaged between the retaining ring (14) and the limiting step (15).

7. A static balancing valve according to claim 1, characterized in that: One end of the valve stem (7) extends out of the valve cover (2) and connects to the handwheel (16).

8. A static balancing valve according to claim 1, characterized in that: The valve body (1) is provided with two test holes. One test hole is connected to the inlet (3) and the other test hole is connected to the outlet (4). The two test holes are respectively provided with pressure testing connector assemblies (17). The outer circle of the pressure testing connector assembly (17) is provided with a hexagonal surface (18).

Images