Y-type jacketed regulating valve

Abstract

The utility model belongs to the technical field of governing valve, especially a Y type jacket governing valve, including main valve body, its internal flow channel is Y type angle formula structure, the angle between entrance and export is degree, main valve body and medium contact surface polishing treatment, and the outside of main valve body sets up jacket assembly, valve body assembly includes valve cover, valve rod and valve petal, the valve cover and main valve body corner are the circular arc surface that is tangent to export, the lower end of valve rod is connected valve petal through pin, sealing assembly includes the winding gasket that sets up between main valve body and valve cover, and bellows assembly and packing part on valve rod, the utility model discloses reasonable in design, not only has optimized flow channel structure and avoided appearing dead zone, still through high accuracy polishing treatment and jacket heat preservation design satisfied food -grade production requirement, has reliable sealing performance and heat preservation performance simultaneously, significantly improved the adaptability and reliability of valve under complex working condition.

Description

Technical Field

[0001] This utility model relates to the field of regulating valve technology, and in particular to a Y-type jacketed regulating valve. Background Technology

[0002] Control valves are key automated devices in industrial production used to regulate the flow, pressure, and temperature of fluids (liquids, gases, steam, etc.), and are widely used in chemical, petroleum, and pharmaceutical industries. Taking PET (polyethylene terephthalate) esters as an example, its viscosity is high in its molten state at 280℃ (similar to honey), and it easily solidifies as the temperature decreases. Conventional control valves suffer from the following core defects:

[0003] Flow channel design flaw: The straight-through Z-shaped flow channel forms a "dead zone" on the lower side of the valve seat. After the medium accumulates and solidifies, it is easy to block the valve, resulting in production interruption (for example, a chemical plant needs to stop the machine every 2 hours to clean the valve due to blockage, resulting in an annual loss of more than 500,000 yuan).

[0004] The flow channel structure is complex: the inner wall of the straight flow channel is difficult to polish, the surface roughness is high (Ra≥6.3μm), the risk of media residue is high, and it does not meet the cleanliness requirements for food-grade PET production.

[0005] No insulation structure: The lack of jacket insulation design causes a sudden drop in temperature (temperature difference can reach more than 50°C) when the medium flows through the valve, which leads to valve jamming and failure after solidification.

[0006] Therefore, this utility model proposes a Y-type jacketed regulating valve to solve the above problems.

[0007] The information disclosed in this background section is intended only to enhance the understanding of the overall background of this utility model and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Utility Model Content

[0008] The purpose of this utility model is to address the shortcomings mentioned in the background art by proposing a Y-type jacketed regulating valve.

[0009] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a Y-type jacketed regulating valve, comprising:

[0010] The main valve body has a Y-shaped flow channel structure inside, with an angle of degrees between the inlet and outlet. The surface of the main valve body that contacts the medium is polished, and a jacket assembly is provided on the outside of the main valve body.

[0011] The valve body assembly includes a valve cover, a valve stem, and a valve disc. The valve cover has an arc surface tangent to the outlet at the corner where it meets the main valve body. The lower end of the valve stem is connected to the valve disc by a pin.

[0012] The sealing assembly includes a spiral wound gasket disposed between the main valve body and the valve cover, and a bellows assembly and packing portion on the valve stem;

[0013] The control unit includes a positioner and a pneumatic diaphragm actuator. The positioner is connected to the pneumatic diaphragm actuator and is used to receive a 4-20mA signal and drive the valve stem to move.

[0014] Preferably, the jacket assembly insulates the main valve body using HTM heat transfer medium.

[0015] Preferably, the bellows assembly is welded to the valve stem and valve cover at both ends to form a sealed space.

[0016] Preferably, the sealing assembly further includes braided packing, a packing sleeve, a packing plate, a second stud, and a second nut. The braided packing and the packing portion are pressed against the valve stem by the packing sleeve and the packing plate. The second stud is threadedly connected to the valve cover and secured by the second nut.

[0017] Preferably, the main valve body and the valve cover are fastened together by a stud and a nut, and a sealing is achieved by compression and winding of the gasket.

[0018] Preferably, a bushing is provided on the valve stem to support the valve stem and prevent instability.

[0019] Preferably, the pneumatic diaphragm actuator is connected to the valve cover via a locking nut, and in the event of a pneumatic power failure, the upper spring force of the pneumatic diaphragm actuator drives the valve to close.

[0020] Preferably, the execution control component further includes a filter, which is disposed between the positioner and the gas source to filter gas impurities.

[0021] Preferably, a spring washer is provided between the second stud and the second nut to prevent the second nut from loosening.

[0022] Preferably, the main valve body adopts a welded structure, and the polishing precision of the internal surface in contact with the medium is not less than Ra0.8μm.

[0023] The beneficial effects of this utility model are:

[0024] This invention effectively solves the clogging and sealing problems of traditional control valves under high-viscosity media conditions through optimized design. The Y-shaped angled flow channel structure and the arc surface significantly reduce media residue. Combined with high-precision polishing, it greatly reduces the risk of media solidification, meeting food-grade production requirements. At the same time, the jacket insulation design ensures stable media temperature, avoiding solidification or decreased fluidity due to temperature differences, thereby improving valve operational reliability. Furthermore, through the precise cooperation of multiple sealing structures and actuators, it not only enhances the valve's sealing performance but also achieves automated and precise control, improving overall work efficiency and safety. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the structure of a Y-type jacketed regulating valve proposed in this utility model;

[0027] Figure 2 This is a cross-sectional structural diagram of the present invention from another perspective.

[0028] In the diagram: 1. Main valve body; 2. Valve body assembly; 21. Valve disc; 22. Pin; 23. Bellows assembly; 24. Valve stem; 25. Bushing; 26. Valve cover; 3. Jacket assembly; 4. Spiral wound gasket; 5. Stud 1; 6. Nut 1; 7. Braided packing; 8. Packing section; 9. Locking nut; 10. Packing gland; 11. Packing pressure plate; 12. Stud 2; 13. Nut 2; 14. Spring washer; 15. Filter; 16. Positioner; 17. Pneumatic diaphragm actuator. Detailed Implementation

[0029] The technical solution of this utility model will now be clearly and completely described with reference to specific embodiments. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0030] Reference Figure 1-2 A Y-type jacketed regulating valve includes a main valve body 1 with an internal flow channel of Y-shaped angle structure and an angle of 120 degrees between the inlet and outlet. The surface of the main valve body 1 in contact with the medium is polished. The main valve body 1 adopts a welded structure, and the polishing accuracy of the internal surface of the main valve body 1 in contact with the medium is not less than Ra0.8μm, which significantly reduces medium residue, avoids dead zones in the flow channel, greatly reduces the risk of medium solidification, meets the requirements of food-grade production, and a jacket assembly 3 is provided on the outside of the main valve body 1. The jacket assembly 3 insulates the main valve body 1 with heat through HTM heat medium.

[0031] The valve body assembly 2 includes a valve cover 26, a valve stem 24, and a valve disc 21. The valve cover 26 is a circular arc surface tangent to the outlet at the corner of the main valve body 1. The valve disc 21 is hinged to the lower end of the valve stem 24 by a pin 22 to ensure that the valve disc 21 can move up and down with the valve stem 24 to adjust the valve seat opening of the main valve body 1. The main valve body 1 and the valve cover 26 are fastened by studs 5 and nuts 6 and sealed by compression-wound gaskets 4.

[0032] The sealing assembly includes a spiral wound gasket 4 disposed between the main valve body 1 and the valve cover 26, and a bellows assembly 23 and a packing part 8 on the valve stem 24. The two ends of the bellows assembly 23 are welded to the valve stem 24 and the valve cover 26 respectively to form a sealing space to ensure that there is no medium leakage when the valve stem 24 moves. The sealing assembly also includes braided packing 7, a packing sleeve 10, a packing plate 11, a stud 2 12 and a nut 2 13. The braided packing 7 and the packing part 8 are pressed against the valve stem 24 by the packing sleeve 10 and the packing plate 11. The stud 2 12 is threadedly connected to the valve cover 26 and fastened by the nut 2 13.

[0033] The actuator control unit includes a positioner 16 and a pneumatic diaphragm actuator 17. The positioner 16 is connected to the pneumatic diaphragm actuator 17 and is used to receive a 4-20mA signal and drive the valve stem 24 to move. The pneumatic diaphragm actuator 17 is connected to the valve cover 26 through a locking nut 9. When the air source fails, the upper spring force of the pneumatic diaphragm actuator 17 drives the valve to close. The actuator control unit also includes a filter 15, which is disposed between the positioner 16 and the air source to filter gas impurities.

[0034] In this embodiment, a bushing 25 is provided on the valve stem 24 to prevent the valve stem 24 from becoming unstable.

[0035] In this embodiment, a spring washer 14 is provided between the stud 12 and the nut 13 to prevent the nut from loosening.

[0036] For any modules, mechanisms, or other components that are required but not mentioned, existing technologies are used, which can be fully implemented by those skilled in the art, and there is no need to elaborate. The content protected by this application does not involve any improvement to the software, circuits, or methods.

[0037] Working principle: In use, the medium is first introduced into the main valve body 1 through the inlet. Since the internal flow channel of the main valve body 1 is a Y-shaped angle structure and the angle between the inlet and outlet is 120 degrees, this design can effectively avoid the "dead zone" problem common in traditional straight-through flow channels, thereby reducing the residue and accumulation of medium in the flow channel. After the medium enters the main valve body 1, the positioner 16 receives the external control signal (4-20mA) by adjusting the action of the pneumatic diaphragm actuator 17 and converts the signal into mechanical motion, driving the valve stem 24 to move up and down. The movement of the valve stem 24 is transmitted to the valve disc 21 through the pin 22, thereby adjusting the opening between the valve disc 21 and the valve seat, so as to achieve precise control of the medium flow, pressure or temperature.

[0038] During operation, the jacket assembly 3 continuously provides insulation to the main valve body 1 through the HTM heat medium, ensuring that the medium maintains a stable temperature when flowing through the valve, avoiding solidification or decreased fluidity caused by temperature differences. At the same time, the multi-seal structure formed by the bellows assembly 23 and the spiral wound gasket 4 can effectively prevent medium leakage and ensure the reliability and safety of the valve under high viscosity medium conditions. In addition, the packing section 8 and the braided packing 7 are tightly pressed onto the valve stem 24 through the packing sleeve 10 and the packing pressure plate 11, further enhancing the sealing performance. The spring washer 14 effectively prevents the nut 13 from loosening and improves the stability of the overall structure.

[0039] When the gas source fails, the spring force on the upper side of the pneumatic diaphragm actuator 17 will quickly drive the valve to close, preventing abnormal flow of the medium and ensuring system safety. At the same time, the filter 15 can filter the gas entering the positioner 16 and remove impurities, thereby protecting the normal operation of the actuator control components. The design of the entire valve not only optimizes the flow channel structure, but also meets the requirements of food-grade production through high-precision polishing and jacket insulation design, significantly improving the adaptability and reliability of the valve under complex working conditions.

[0040] The Y-type jacketed regulating valve provided by this utility model has been described in detail above. Specific embodiments have been used to illustrate the principle and implementation of this utility model. The descriptions of the embodiments above are only for the purpose of helping to understand the method and core idea of ​​this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made to this utility model without departing from the principle of this utility model, and these improvements and modifications also fall within the protection scope of the claims of this utility model.

Claims

1. A Y-type jacketed regulating valve, characterized in that, include: The main valve body (1) has a Y-shaped flow channel with an angle of 120 degrees between the inlet and outlet. The surface of the main valve body (1) in contact with the medium is polished, and a jacket assembly (3) is provided on the outside of the main valve body (1). The valve body assembly (2) includes a valve cover (26), a valve stem (24) and a valve disc (21). The valve cover (26) is a circular arc surface tangent to the outlet at the corner of the main valve body (1). The lower end of the valve stem (24) is connected to the valve disc (21) by a pin (22). The sealing assembly includes a spiral wound gasket (4) disposed between the main valve body (1) and the valve cover (26), and a bellows assembly (23) and a packing portion (8) on the valve stem (24). The control unit includes a positioner (16) and a pneumatic diaphragm actuator (17), the positioner (16) being connected to the pneumatic diaphragm actuator (17) for receiving a 4-20mA signal and driving the valve stem (24) to move.

2. The Y-type jacketed regulating valve according to claim 1, characterized in that, The jacket assembly (3) insulates the main valve body (1) with HTM heat medium.

3. The Y-type jacketed regulating valve according to claim 1, characterized in that, The bellows assembly (23) is welded to the valve stem (24) and the valve cover (26) at both ends to form a sealed space.

4. The Y-type jacketed regulating valve according to claim 1, characterized in that, The sealing assembly also includes braided packing (7), packing sleeve (10), packing plate (11), stud (12) and nut (13). The braided packing (7) and packing part (8) are pressed against the valve stem (24) by the packing sleeve (10) and packing plate (11). The stud (12) is threaded to the valve cover (26) and fastened by the nut (13).

5. The Y-type jacketed regulating valve according to claim 1, characterized in that, The main valve body (1) and the valve cover (26) are fastened by stud (5) and nut (6), and the compression and winding gasket (4) achieves sealing.

6. The Y-type jacketed regulating valve according to claim 1, characterized in that, A bushing (25) is provided on the valve stem (24) to support the valve stem (24) and prevent it from becoming unstable.

7. The Y-type jacketed regulating valve according to claim 1, characterized in that, The pneumatic diaphragm actuator (17) is connected to the valve cover (26) via a locking nut (9), and when the air source fails, the upper spring force of the pneumatic diaphragm actuator (17) drives the valve to close.

8. The Y-type jacketed regulating valve according to claim 1, characterized in that, The execution control component also includes a filter (15), which is disposed between the positioner (16) and the gas source for filtering gas impurities.

9. The Y-type jacketed regulating valve according to claim 4, characterized in that, A spring washer (14) is provided between the stud (12) and the nut (13) to prevent the nut (13) from loosening.

10. The Y-type jacketed regulating valve according to claim 1, characterized in that, The main valve body (1) adopts a welded structure, and the polishing precision of the internal surface in contact with the medium is not less than Ra0.8μm.

Images