Corrugated pipe regulating valve

Abstract

The utility model relates to the technical field of regulating valves, in particular to a corrugated pipe regulating valve, which comprises a valve body, a water inlet and a water outlet are respectively arranged at two ends of the valve body, the water inlet is connected with the water outlet through a fluid channel, a regulating hole is arranged at the top of the valve body, a valve clack is arranged in the fluid channel below the regulating hole, and a valve rod is arranged on the valve clack. The top of the valve clack is connected with the valve rod, the top of the valve rod penetrates through the corrugated pipe and the filler cylinder to be connected with the connecting block, the top of the connecting block is connected with the driving end of the actuator, the connecting block is located on the inner side of the support, the bottom of the support is connected with the top of the valve body through the connecting pipe, and the corrugated pipe is located on the inner side of the connecting pipe. A valve cover of the adjusting valve is changed into a corrugated pipe mechanism, the possibility that a process medium leaks outwards from a movement gap of a valve rod can be eliminated, and due to the deformability and excellent aging resistance of a corrugated pipe element, the defects of packing aging, temperature difference sensitivity and the like generally existing in a packing seal valve are overcome.

Description

Technical Field

[0001] The utility model relates to the technical field of regulating valves, in particular to a bellows regulating valve. Background Art

[0002] A regulating valve, also known as a control valve, is a device in a process control system that uses power to change the flow of fluid. It is also a control device in a combination instrument and an important device in the automatic adjustment system of the production process. In the automatic control of modern factories, the regulating valve plays the role of variable resistance in the pipeline.

[0003] When controlling gases or highly toxic gases, current control valves can experience wear and tear on the packing due to prolonged, high-frequency operation of the valve stem seal, leading to valve leakage and unpredictable consequences. Simply increasing the amount of packing or tightening the packing to eliminate valve leakage increases the operating force, making the valve less sensitive and affecting regulation accuracy.

[0004] Therefore, it is necessary to provide a bellows regulating valve to solve the above technical problems. Utility Model Content

[0005] In order to solve the above technical problems, the utility model provides a bellows regulating valve.

[0006] The utility model provides a bellows regulating valve, comprising: a valve body, wherein two ends of the valve body are respectively provided with a water inlet and a water outlet, the water inlet and the water outlet are connected by a fluid channel, the top of the valve body is provided with an adjusting hole, the fluid channel below the adjusting hole is internally installed with a valve flap that can control the opening and closing of the fluid channel, the top of the valve flap is connected to the valve stem, the top of the valve stem is connected to the stuffing tube and the connecting block through the bellows, the stuffing tube has stuffing built in, the top of the connecting block is connected to the driving end of the actuator, the connecting block is located on the inner side of the bracket, the top of the bracket is movably connected to the bottom of the actuator, the bottom of the bracket and the top of the valve body are connected by a connecting pipe, and the bellows is located on the inner side of the connecting pipe.

[0007] Preferably, the filler is V-type polytetrafluoroethylene, polytetrafluoroethylene-impregnated asbestos or graphite.

[0008] Preferably, the actuator used by the actuator is one of a spring diaphragm type, a piston type, an electric actuator, a hydraulic actuator, and an electro-hydraulic linkage actuator.

[0009] Preferably, the fluid channel is S-shaped, and the water inlet and the water outlet are located at the same height.

[0010] Preferably, a fixing cylinder is installed at the bottom of the bracket, a valve body nut is installed at the bottom of the fixing cylinder, the valve body nut is threadedly connected to the top of the connecting pipe, and the bottom of the connecting pipe is threadedly connected to the inner wall of the adjusting hole.

[0011] Preferably, a positioning adjustment nut is connected below the connecting block, and a portion of the valve stem is located inside the positioning adjustment nut.

[0012] Preferably, the top and bottom of the corrugated pipe are connected to an upper welding sleeve and a lower welding sleeve respectively.

[0013] Compared with the related art, the bellows regulating valve provided by the present invention has the following beneficial effects:

[0014] 1. This utility model replaces the valve cover of the regulating valve with a bellows mechanism, which eliminates the possibility of process media leaking outward from the valve stem movement gap. Due to the deformability and outstanding aging resistance of the bellows element itself, this regulating valve completely overcomes the common weaknesses of packing seal valves, such as packing aging and temperature sensitivity. In addition, by adopting a bellows-packing double sealing structure, the regulating valve has better safety and reliability, and is widely used in automatic control systems for rare and special media such as highly toxic, highly corrosive, and radioactive media.

[0015] 2. The utility model can improve the selectivity of the overall regulating valve device by selecting one of multiple structures for the actuator used in the actuator, and then select different actuators according to different needs to improve the adaptability of the device;

[0016] 3. The utility model sets the fluid channel into an S-shape, which can reduce the pressure drop loss during adjustment, increase the flow rate of the regulating valve, and increase the adjustment range of the regulating valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic structural diagram of a preferred embodiment of a bellows regulating valve provided by the present utility model;

[0018] Figure 2 for Figure 1 A schematic cross-sectional view of a bellows regulating valve is shown;

[0019] Numbers in the figure: 1. Valve body; 2. Water inlet; 3. Water outlet; 4. Valve stem; 5. Connecting block; 6. Actuator; 7. Bracket; 8. Positioning adjustment nut; 9. Connecting pipe; 10. Fixing cylinder; 11. Valve body nut; 12. Fluid channel; 13. Valve disc; 14. Bellows; 15. Stuffing cylinder. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0021] refer to Figures 1 to 2 The utility model provides a bellows regulating valve, comprising: a valve body 1, wherein both ends of the valve body 1 are respectively provided with a water inlet 2 and a water outlet 3, the water inlet 2 and the water outlet 3 are connected by a fluid channel 12, the top of the valve body 1 is provided with an adjusting hole, and a valve disc 13 for controlling the opening and closing of the fluid channel 12 is installed inside the fluid channel 12 below the adjusting hole, the top of the valve disc 13 is connected to the valve stem 4, the top of the valve stem 4 is connected to the stuffing cylinder 15 and the connecting block 5 through the bellows 14, the stuffing cylinder 15 is equipped with stuffing, the top of the connecting block 5 is connected to the driving end of the actuator 6, the connecting block 5 is located on the inner side of the bracket 7, the top of the bracket 7 is movably connected to the bottom of the actuator 6, the bottom of the bracket 7 is connected to the top of the valve body 1 by a connecting pipe 9, and the bellows 14 is located on the inner side of the connecting pipe 9.

[0022] It should be noted that changing the valve cover of the regulating valve to a bellows 14 mechanism can eliminate the possibility of process media leaking outward from the movement gap of the valve stem 4, and due to the deformability and outstanding aging resistance of the bellows 14 component itself, this regulating valve completely overcomes the weaknesses of packing seal valves such as packing aging and temperature difference sensitivity. In addition, by adopting the bellows 14-packing double sealing structure, the safety and reliability are better, and it is widely used in automatic control systems for rare and special media such as highly toxic, highly corrosive, and radioactive media.

[0023] In the embodiment of the present utility model, reference Figure 1 As shown, the filler is V-type polytetrafluoroethylene, or one of polytetrafluoroethylene-impregnated asbestos or graphite.

[0024] It should be noted that by selecting V-type polytetrafluoroethylene, polytetrafluoroethylene-impregnated asbestos or graphite as the filler, the selectivity of the regulating valve material can be improved, and the sealing performance of the connection between the valve stem 4 and the valve body 1 can be effectively improved, and the friction can be reduced, so that the valve stem 4 can be easily moved up and down.

[0025] In the embodiment of the present utility model, reference Figure 1 As shown, the actuator 6 adopts an actuator mechanism selected from the group consisting of a spring diaphragm type, a piston type, an electric actuator, a hydraulic actuator, and an electro-hydraulic linkage actuator.

[0026] It should be noted that by selecting one of multiple structures as the actuator used by the actuator 6, the selectivity of the entire regulating valve device can be improved, and different actuators can be selected according to different needs to improve the adaptability of the device.

[0027] In the embodiment of the present utility model, reference Figure 2 As shown, the shape of the fluid channel 12 is S-shaped, and the water inlet 2 and the water outlet 3 are located at the same height.

[0028] It should be noted that by setting the fluid channel 12 to be S-shaped, the pressure drop loss can be reduced during regulation, the flow rate of the regulating valve can be increased, and the regulating range of the regulating valve can be expanded.

[0029] In the embodiment of the present utility model, reference Figure 1 As shown, a fixing cylinder 10 is installed at the bottom of the bracket 7, and a valve body nut 11 is installed at the bottom of the fixing cylinder 10. The valve body nut 11 is threadedly connected to the top of the connecting pipe 9, and the bottom of the connecting pipe 9 is threadedly connected to the inner wall of the adjustment hole.

[0030] It should be noted that: by providing a fixing cylinder 10 with a valve body nut 11, on the one hand, it is convenient to connect with the valve body nut 11 through the valve body nut 11, thereby improving the convenience of connection and facilitating the disassembly of the connecting pipe 9 when problems occur later, thereby improving the convenience of maintenance.

[0031] In the embodiment of the present utility model, reference Figure 1 As shown, a positioning adjustment nut 8 is connected to the bottom of the connecting block 5 , and a portion of the valve stem 4 is located on the inner side of the positioning adjustment nut 8 .

[0032] It should be noted that the positioning adjustment nut 8 can provide a positioning and guiding effect on the valve stem 4, thereby improving the stability of the valve stem 4 when it moves up and down.

[0033] In the embodiment of the present utility model, reference Figure 1 As shown, the top and bottom of the bellows 14 are connected to an upper welding sleeve and a lower welding sleeve respectively.

[0034] The working principle of the bellows 14 regulating valve provided by the utility model is as follows:

[0035] Changing the valve cover of the regulating valve to a bellows 14 mechanism can eliminate the possibility of process media leaking outward from the movement gap of the valve stem 4. Due to the deformability and outstanding aging resistance of the bellows 14 component itself, this regulating valve completely overcomes the weaknesses of packing seal valves such as packing aging and temperature difference sensitivity. In addition, by adopting the bellows 14-packing double sealing structure, the safety and reliability are better, and it is widely used in automatic control systems for rare and special media such as highly toxic, highly corrosive, and radioactive media.

[0036] The circuits and controls involved in the present invention are all prior art and will not be described in detail here.

[0037] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the description and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A bellows regulating valve, characterized in that: include: A valve body (1), wherein both ends of the valve body (1) are provided with a water inlet (2) and a water outlet (3), the water inlet (2) and the water outlet (3) are connected via a fluid channel (12), an adjustment hole is provided on the top of the valve body (1), a valve flap (13) for controlling the opening and closing of the fluid channel (12) is installed inside the fluid channel (12) below the adjustment hole, the top of the valve flap (13) is connected to the valve stem (4), and the top of the valve stem (4) passes through the bellows (1 4) is connected to a stuffing tube (15) and a connecting block (5), wherein the stuffing tube (15) has a stuffing built therein, the top of the connecting block (5) is connected to the driving end of the actuator (6), the connecting block (5) is located on the inner side of the bracket (7), the top of the bracket (7) is movably connected to the bottom of the actuator (6), the bottom of the bracket (7) is connected to the top of the valve body (1) via a connecting pipe (9), and the bellows (14) is located on the inner side of the connecting pipe (9).

2. The bellows regulating valve according to claim 1, characterized in that: The filler is selected from V-type polytetrafluoroethylene, polytetrafluoroethylene-impregnated asbestos or graphite.

3. The bellows regulating valve according to claim 1, characterized in that: The actuator (6) adopts an actuator selected from the group consisting of a spring film type, a piston type, an electric actuator, a hydraulic actuator, and an electro-hydraulic linkage actuator.

4. The bellows regulating valve according to claim 1, characterized in that: The fluid channel (12) is in an S-shaped shape, and the water inlet (2) and the water outlet (3) are located at the same height.

5. The bellows regulating valve according to claim 1, characterized in that: A fixing cylinder (10) is installed at the bottom of the bracket (7), a valve body nut (11) is installed at the bottom of the fixing cylinder (10), the valve body nut (11) is threadedly connected to the top of the connecting pipe (9), and the bottom of the connecting pipe (9) is threadedly connected to the inner wall of the adjustment hole.

6. The bellows regulating valve according to claim 5, characterized in that: A positioning adjustment nut (8) is connected below the connecting block (5), and a portion of the valve stem (4) is located inside the positioning adjustment nut (8).

7. The bellows regulating valve according to claim 5, characterized in that: The top and bottom of the bellows (14) are respectively connected to an upper welding sleeve and a lower welding sleeve.

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