Self-regulating flow control valve

Abstract

This utility model discloses a self-operated flow control valve, including a valve body, a diaphragm, an automatic adjusting shaft, an adjusting component, a valve cover, a manual flow adjusting shaft, a control component, a guide tube, and a guide hole. The diaphragm is installed in the valve body. The automatic adjusting shaft is detachably connected between the diaphragm and the valve body. The adjusting component is located between the automatic adjusting shaft and the valve body. The valve cover is detachably installed on the valve body. The manual flow adjusting shaft is rotatably installed on the valve cover. A flow indicator dial is connected through the manual flow adjusting shaft, and the flow indicator dial has multiple sets of scale values. This self-operated flow control valve can automatically adjust the pressure difference before and after the throttling orifice to maintain a constant pressure when the system pressure changes, so that the flow through the throttling orifice is not affected by the system pressure fluctuation. This allows for precise flow control, ensuring flow stability and system flow stability, and ultimately automatically achieving system flow balance.

Description

Technical Field

[0001] This utility model relates to the field of flow control valve technology, specifically to a self-operated flow control valve. Background Technology

[0002] In industrial production, water conservancy projects, urban water supply and drainage, HVAC and various fluid transportation systems, flow control is the core link to ensure stable system operation, improve energy efficiency and achieve precise process control. At present, most of the mainstream flow control valves on the market are based on traditional mechanical structure design. By adjusting the flow area between the valve core and the valve seat (i.e., valve opening), the flow resistance of the fluid in the pipeline is changed, thereby achieving the regulation of fluid flow.

[0003] Current flow control valves generally suffer from the inability to achieve complete closure and have relatively low control accuracy. While suitable for applications with infrequent flow regulation and low requirements for control precision, they pose serious safety hazards and economic losses. Furthermore, as various industries continuously increase their requirements for production precision, energy efficiency, and safety performance, the shortcomings of flow control valves in terms of control accuracy and closure performance have become a key bottleneck restricting technological upgrades and industrial development in related fields. Therefore, we propose a self-regulating flow control valve that can automatically adjust the pressure difference before and after the throttling orifice to maintain a constant pressure when the system pressure changes. This ensures that the flow rate through the throttling orifice is not affected by system pressure fluctuations, thereby enabling precise flow control and ensuring stable system flow. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] To address the shortcomings of existing technologies, this utility model provides a self-regulating flow control valve to solve the problem of low flow control accuracy mentioned in the background technology.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, this utility model provides the following technical solution: a self-operated flow control valve, comprising a valve body, a diaphragm, an automatic adjusting shaft, an adjusting assembly, a valve cover, a manual flow adjusting shaft, a control assembly, a flow guide tube, and a flow guide hole;

[0008] The diaphragm is installed in the valve body;

[0009] The automatic adjustment shaft is detachably connected through the diaphragm and the valve body;

[0010] The adjustment component is disposed between the automatic adjustment shaft and the valve body;

[0011] The valve cover is detachably mounted on the valve body;

[0012] The manual flow adjustment shaft is rotatably mounted on the valve cover.

[0013] The control component is installed inside the valve body;

[0014] The guide tube is connected to the valve body, and the outlet of the guide tube is connected to the upper cavity of the diaphragm;

[0015] The flow guide hole is configured as two, and the two flow guide holes are symmetrically opened on the flow guide pipe.

[0016] As a preferred technical solution of this application, the control component includes:

[0017] A flow regulating plunger is installed in the valve body, and a manual flow regulating shaft is rotatably installed inside the flow regulating plunger.

[0018] A flow-closing upper plate is located below the flow-regulating plunger, and the flow-regulating plunger is rotatably mounted on the upper side of the flow-closing upper plate.

[0019] The lower flow shut-off plate is fixedly installed on the lower side of the upper flow shut-off plate, and corresponding adjustment control ports are provided between the flow adjustment plunger, the manual flow adjustment shaft, the upper flow shut-off plate, and the lower flow shut-off plate;

[0020] A lower plate locking shaft is connected through the valve body, the upper flow-closing plate, and the lower flow-closing plate.

[0021] Lower valve pipe one, which is connected to the valve body;

[0022] Lower valve cap one, which is threadedly connected to lower valve tube one, and the lower plate locking shaft is located inside lower valve cap one.

[0023] As a further embodiment of this application, the adjustment component includes:

[0024] Lower valve pipe two, the lower valve pipe two is connected to the lower side of the valve body, and the automatic adjustment shaft is located inside the lower valve pipe two;

[0025] Lower valve cap two, which is detachably threaded onto lower valve tube two;

[0026] Compression spring, which is fixedly connected to the inner bottom wall of the lower valve cap 2;

[0027] A limiting spring support is disposed between the compression spring and the automatic adjustment shaft.

[0028] Based on the aforementioned scheme, a flow indicator dial is connected through the manual flow adjustment shaft, and the flow indicator dial is provided with multiple sets of scale values.

[0029] Furthermore, a lower sealing O-ring is installed between the upper flow-off plate and the lower flow-off plate.

[0030] It should also be noted that two temperature and pressure measurement holes are symmetrically provided on one side of the valve body.

[0031] (III) Beneficial Effects

[0032] Compared with the prior art, this utility model provides a self-regulating flow control valve, which has the following advantages:

[0033] In this invention, the valve body, diaphragm, valve cover, automatic adjustment shaft, and adjustment components work together to facilitate manual adjustment of the valve opening and control of the flow rate, thereby maintaining a balance between the inlet and outlet flow rates of the valve body. At the same time, when the inlet flow rate of the valve body increases, the control components, guide pipe, and two guide holes work together to facilitate automatic flow rate adjustment, thereby improving the accuracy of flow rate control and ensuring the stability of the system's flow rate. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of the overall structure of this application;

[0035] Figure 2 This is a cross-sectional structural diagram of the valve body, diaphragm, and lower valve tube of this application.

[0036] Figure 3 This is an exploded structural diagram showing the cooperation between the manual flow adjustment shaft, the flow adjustment plunger, and the flow shut-off upper plate of this application;

[0037] Figure 4 This is a schematic diagram of the structure of the automatic adjusting shaft, the lower valve cap, and the limit spring support in this application.

[0038] Figure 5 This is a planar structural schematic diagram of the top view of this application.

[0039] In the diagram: 1. Valve body; 2. Diaphragm; 3. Automatic adjustment shaft; 4. Valve cover; 5. Manual flow adjustment shaft; 6. Guide tube; 7. Guide hole; 8. Flow adjustment cylindrical plug; 9. Upper flow shut-off plate; 10. Lower flow shut-off plate; 11. Lower plate locking shaft; 12. Lower valve tube one; 13. Lower valve cap one; 14. Lower valve tube two; 15. Lower valve cap two; 16. Compression spring; 17. Limiting spring support; 18. Flow indicator dial; 19. Lower plate sealing O-ring; 20. Temperature and pressure measurement reserved hole. Detailed Implementation

[0040] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0041] Please see Figures 1 to 5 A self-operated flow control valve includes a valve body 1, a diaphragm 2, an automatic adjusting shaft 3, an adjusting assembly, a valve cover 4, a manual flow adjusting shaft 5, a control assembly, a guide tube 6, and a guide hole 7. The diaphragm 2 is installed inside the valve body 1. The automatic adjusting shaft 3 is detachably connected between the diaphragm 2 and the valve body 1. The adjusting assembly is located between the automatic adjusting shaft 3 and the valve body 1. The valve cover 4 is detachably installed on the valve body 1. The manual flow adjusting shaft 5 is rotatably mounted on the valve cover 4. A flow indicator dial 18 is connected through the manual flow adjusting shaft 5. The indicator dial 18 is equipped with multiple sets of scale values. When the manual flow adjustment shaft 5 is rotated, the flow indicator dial 18 will also rotate simultaneously. The rotation angle can be displayed through multiple sets of scale values. The control component is installed inside the valve body 1. The guide tube 6 is connected to the valve body 1, and the outlet of the guide tube 6 is connected to the upper cavity of the diaphragm 2. There are two guide holes 7, which are symmetrically opened on the guide tube 6. Two temperature and pressure measurement reserved holes 20 are symmetrically opened on one side of the valve body 1 to facilitate temperature and pressure measurement experiments.

[0042] refer to Figures 1-5 The control assembly includes a flow regulating plunger 8, an upper flow shut-off plate 9, a lower flow shut-off plate 10, a lower plate locking shaft 11, a lower valve tube 12, and a lower valve cap 13. The flow regulating plunger 8 is installed inside the valve body 1. The manual flow regulating shaft 5 is rotatably installed inside the flow regulating plunger 8. The upper flow shut-off plate 9 is located below the flow regulating plunger 8, and the flow regulating plunger 8 is rotatably installed above the upper flow shut-off plate 9. The lower flow shut-off plate 10 is fixedly installed below the upper flow shut-off plate 9. The upper flow shut-off plate 9 and the lower flow shut-off plate... A lower sealing O-ring 19 is installed between the upper flow-closing plate 9 and the lower flow-closing plate 10, which increases the sealing between them. The flow-regulating plunger 8, the manual flow-regulating shaft 5, the upper flow-closing plate 9 and the lower flow-closing plate 10 are all provided with corresponding adjustment control ports. The lower plate locking shaft 11 is connected through the valve body 1, the upper flow-closing plate 9 and the lower flow-closing plate 10. The lower valve tube 12 is connected to the valve body 1. The lower valve cap 13 is threaded to the lower valve tube 12. The lower plate locking shaft 11 is located inside the lower valve cap 13.

[0043] Rotating the manual flow adjustment shaft 5 allows the adjustment control port on the manual flow adjustment shaft 5 to be rotated to a suitable position. By adjusting the angle between the adjustment control port on the manual flow adjustment shaft 5, the adjustment control port on the flow adjustment plunger 8, the adjustment control port on the upper flow shut-off plate 9, and the adjustment control port on the lower flow shut-off plate 10, the flow range can be easily adjusted, thus facilitating manual control of the flow.

[0044] refer to Figures 1-5 The adjustment assembly includes a lower valve tube 14, a lower valve cap 15, a compression spring 16, and a limit spring support 17. The lower valve tube 14 is connected to the lower side of the valve body 1, and the automatic adjustment shaft 3 is located inside the lower valve tube 14. The lower valve cap 15 is detachably threaded onto the lower valve tube 14. The compression spring 16 is fixedly connected to the inner bottom wall of the lower valve cap 15. The limit spring support 17 is located between the compression spring 16 and the automatic adjustment shaft 3.

[0045] When the flow rate at the inlet of valve body 1 increases, it will apply pressure to the automatic adjustment shaft 3, causing the limit spring support 17 to apply pressure to the compression spring 16. Through the extension of the compression spring 16, the automatic adjustment shaft 3 can move within the valve body 1. The movement of the automatic adjustment shaft 3 facilitates the adjustment of the flow rate within the valve body 1, thereby facilitating the maintenance of flow balance between the inlet and outlet of valve body 1, and thus facilitating the achievement of system flow balance.

[0046] In summary, in an emergency, rotating the manual flow control shaft 5 rotates the adjustment control port on the manual flow control shaft 5 into the flow adjustment cylinder plug 8, sealing the flow between the manual flow control shaft 5 and the flow adjustment cylinder plug 8, thus achieving flow cutoff and reducing losses. When using this self-operated flow control valve, first manually adjust the manual flow control shaft 5 to adjust the valve opening and maintain a balance of inlet and outlet flow in the valve body 1. When the inlet flow of the valve body 1 increases, pressure is applied to the guide pipe 6 through the outlet of the valve body 1. Simultaneously, the automatic adjustment shaft 3 moves to compress the compression spring 16, adjusting the flow within the valve body 1. Depressing the automatic adjustment shaft 3 decreases the flow, and vice versa, thus facilitating a balance of flow between the inlet and outlet of the valve body 1, and consequently, facilitating system flow balance. Therefore, when system pressure changes, this self-operated flow control valve can automatically adjust the pressure difference between the inlet and outlet of the valve body 1 to maintain a constant value, ensuring that the flow through the valve body 1 is unaffected by system pressure fluctuations, thereby guaranteeing flow stability and automatically achieving system flow balance.

[0047] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A self-contained flow control valve characterized by, include: Valve body (1); A diaphragm (2) is installed inside the valve body (1); An automatic adjustment shaft (3) is detachably connected through the diaphragm (2) and the valve body (1); An adjustment assembly is disposed between the automatic adjustment shaft (3) and the valve body (1); Valve cover (4), which is detachably mounted on the valve body (1); Manual flow adjustment shaft (5), which is rotatably mounted on the valve cover (4); A control component, which is installed inside the valve body (1); A guide tube (6) is connected to the valve body (1), and the outlet of the guide tube (6) is connected to the upper cavity of the diaphragm (2); The guide hole (7) is provided in two parts, and the two guide holes (7) are symmetrically opened on the guide pipe (6).

2. The self-contained flow control valve of claim 1, wherein, The control component includes: A flow regulating plunger (8) is installed inside the valve body (1), and a manual flow regulating shaft (5) is rotatably installed inside the flow regulating plunger (8). The flow shut-off plate (9) is located below the flow regulating plunger (8), and the flow regulating plunger (8) is rotatably mounted on the upper side of the flow shut-off plate (9). The lower flow shut-off plate (10) is fixedly installed on the lower side of the upper flow shut-off plate (9), and corresponding adjustment control ports are provided between the flow adjustment plunger (8), the manual flow adjustment shaft (5), the upper flow shut-off plate (9) and the lower flow shut-off plate (10); The lower plate locking shaft (11) is connected through the valve body (1), the flow shut-off upper plate (9) and the flow shut-off lower plate (10); Lower valve pipe one (12), the lower valve pipe one (12) is connected to the valve body (1); Lower valve cap one (13) is threadedly connected to the lower valve tube one (12), and the lower plate locking shaft (11) is located inside the lower valve cap one (13).

3. The self-contained flow control valve of claim 2, wherein, The adjustment component includes: Lower valve tube two (14) is connected to the lower side of the valve body (1), and the automatic adjustment shaft (3) is located inside the lower valve tube two (14); Lower valve cap two (15), the lower valve cap two (15) is threadedly detachably connected to the lower valve tube two (14); Compression spring (16), the compression spring (16) is fixedly connected to the inner bottom wall of the lower valve cap (15); A limiting spring support (17) is provided between the compression spring (16) and the automatic adjustment shaft (3).

4. The self-contained flow control valve of claim 3, wherein, The manual flow adjustment shaft (5) is connected to a flow indicator dial (18), which has multiple sets of scale values.

5. The self-contained flow control valve of claim 4, wherein, A lower sealing O-ring (19) is installed between the upper flow shut-off plate (9) and the lower flow shut-off plate (10).

6. The self-contained flow control valve of claim 5, wherein, Two temperature and pressure measuring reserved holes (20) are symmetrically arranged on one side of the valve body (1).

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