Regulating valve structure

Abstract

The utility model relates to the technical field of adjusting valves, in particular to an adjusting valve structure which comprises a valve body, a valve seat, a valve rod, a valve element, a valve deck and an executing mechanism, the valve body is provided with an adaptive groove used for being matched with the valve seat in an embedded mode, the valve rod is fixedly connected with the valve element, the valve seat is detachably connected with the valve deck, the valve rod is arranged on the valve deck in a sliding mode, and the executing mechanism is arranged on the valve deck. A guide hole is formed in the valve seat, a liquid inlet flow channel and a liquid outlet flow channel are formed in the valve body, an opening and closing opening is formed between the liquid inlet flow channel and the liquid outlet flow channel, the end, away from the valve element, of the valve rod is connected with an executing mechanism, the valve body and the valve seat are detachably connected, and the valve seat and the valve cover are detachably connected. Therefore, a worker can conveniently disassemble and replace the valve seat; by means of the guide hole formed in the valve seat, the actuating mechanism drives the valve rod to drive the valve element to accurately slide in the guide hole, so that opening and closing of the opening and closing opening between the liquid inlet flow channel and the liquid outlet flow channel are controlled, and then flow adjustment is achieved.

Description

Technical Field

[0001] This application relates to the field of control valve technology, and in particular to a control valve structure. Background Technology

[0002] Existing control valves are instruments used in fluid pipelines to regulate thermal variables such as flow rate, liquid level, and temperature. Single-seat control valves are typically used to regulate and shut off fluids.

[0003] In traditional single-seat control valves, the valve seat is typically screwed into the valve body via a thread. A guide component is located between the valve body and the valve cover to guide the valve core to move up and down, thereby ensuring good contact between the valve core and the sealing surface on the valve seat. In practical applications, the sealing surface on the valve seat is often damaged due to impurities in the medium, requiring timely replacement of the valve seat.

[0004] Chinese utility model patent CN215214803U discloses a pneumatic single-seat regulating valve, including a valve body, valve core, valve stem, bracket, and valve cover. When the valve seat needs to be disassembled, since the valve seat is completely installed inside the valve body, specific disassembly tools are required to disassemble and install the valve seat, which is not conducive to maintenance and replacement in the pipeline on site, and there is room for improvement. Utility Model Content

[0005] To facilitate the disassembly of the valve seat, this application provides a regulating valve structure.

[0006] This application provides a regulating valve structure, which adopts the following technical solution:

[0007] A regulating valve structure includes a valve body, a valve seat, a valve stem, a valve core, a valve cover, and an actuator for pushing the valve stem to slide up and down. The valve body is provided with an adapter groove for fitting with the valve seat. The valve stem is fixedly connected to the valve core. The valve seat and the valve cover are detachably connected. The valve stem is slidably mounted on the valve cover. The valve seat is provided with a guide hole for guiding the valve core to move up and down within the valve seat. The valve body is provided with an inlet flow channel and an outlet flow channel, forming an opening / closing port between the inlet flow channel and the outlet flow channel. The guide hole communicates with the opening / closing port. The end of the valve stem away from the valve core is connected to the actuator. The end of the valve core away from the valve stem is slidably mounted at the opening / closing port.

[0008] By adopting the above technical solution, the valve seat and the valve body are fitted together by the adapter groove, that is, the valve body and the valve seat are detachably connected, and the valve seat and the valve cover are detachably connected, which makes it easy for the staff to disassemble and replace the valve seat. By using the guide hole on the valve seat, the actuator drives the valve stem to move the valve core accurately in the guide hole, thereby controlling the opening and closing of the opening and closing port between the liquid inlet channel and the liquid outlet channel, and thus realizing the regulation of flow rate.

[0009] Preferably, a first sealing ring is provided between the valve body and the valve seat to seal the gap between the valve body and the valve seat.

[0010] By adopting the above technical solution and utilizing the first sealing ring, the possibility of fluid leakage can be reduced, and the sealing performance and reliability between the valve body and the valve seat can be improved.

[0011] Preferably, a second sealing ring is provided between the valve body and the valve cover to seal the gap between the valve body and the valve cover.

[0012] By adopting the above technical solution and utilizing the second sealing ring, the possibility of fluid leakage can be reduced, and the sealing performance and reliability between the valve body and the valve cover can be improved.

[0013] Preferably, a stuffing box is formed between the valve cover and the valve stem, and a stuffing sleeve for pressing the stuffing inside the stuffing box is fitted on the valve stem.

[0014] By adopting the above technical solution, the packing in the stuffing box can be tightly fitted to the valve stem by utilizing the pressing effect of the packing sleeve, thereby improving the sealing effect.

[0015] Preferably, a packing gland is fitted onto the valve stem, and the packing gland is fixed to the valve cover by bolts. The packing gland is located above the packing sleeve and forms an abutting fit with the packing sleeve.

[0016] By adopting the above technical solution, the bolts on the packing gland are tightened, causing the packing gland to press down on the packing sleeve, which in turn drives the packing sleeve to press down on the packing in the stuffing box, further improving the sealing performance between the valve cover and the valve stem.

[0017] Preferably, the valve cover is provided with a clearance groove to allow the valve core to slide up and down.

[0018] By adopting the above technical solution and utilizing the setting of the clearance groove, the clearance groove provides sufficient clearance space for the valve core to slide up and down, ensuring the smoothness and stability of the valve core during the sliding process.

[0019] Preferably, the valve cover is provided with a connecting bracket and a fixing nut for fixing the connecting bracket, the actuator is disposed on the connecting bracket, and the lower surface of the fixing nut and the upper surface of the connecting bracket form an abutting fit.

[0020] By adopting the above technical solution, the actuator is mounted on the connecting bracket, and the connecting bracket is stably fixed to the valve cover by the fixing nut, thereby ensuring the connection stability between the actuator and the connecting bracket. As a result, the actuator can stably push the valve stem to slide, thus achieving precise control of the opening and closing of the valve.

[0021] Preferably, the actuator is configured as a pneumatic diaphragm actuator, which is connected to the end of the valve stem away from the valve core.

[0022] By adopting the above technical solution and utilizing the pneumatic diaphragm actuator, the pneumatic diaphragm actuator has the advantages of simple structure, reliable operation, and fast response speed. Moreover, the pneumatic diaphragm actuator drives the valve stem to slide through air pressure, making the working process more automated and convenient, and improving work efficiency and reliability.

[0023] In summary, this application includes at least one of the following beneficial technical effects:

[0024] 1. The valve seat and valve body are fitted together by an adapter groove, which allows for a detachable connection between the valve body and the valve seat, as well as a detachable connection between the valve seat and the valve cover. This facilitates the disassembly and replacement of the valve seat by the operator. The valve seat has a guide hole, which drives the valve stem to slide the valve core accurately within the guide hole. This controls the opening and closing of the inlet and outlet channels, thereby regulating the flow rate.

[0025] 2. By utilizing the first and second sealing rings, the possibility of fluid leakage is effectively reduced, and the overall sealing performance of the control valve is improved;

[0026] 3. By utilizing the clearance groove, sufficient clearance space is provided for the valve core to slide up and down, ensuring the smoothness and stability of the valve core during the sliding process. Attached Figure Description

[0027] Figure 1 This is an isometric schematic diagram that mainly illustrates the overall structure in the embodiments of this application.

[0028] Reference numerals in the attached drawings: 1. Valve body; 11. Adaptor groove; 12. Inlet flow channel; 13. Outlet flow channel; 14. Opening / closing port; 2. Valve seat; 21. Guide hole; 22. First sealing ring; 3. Valve stem; 31. Packing sleeve; 32. Packing gland; 4. Valve core; 5. Valve cover; 51. Connecting bracket; 52. Fixing nut; 53. Clearance hole; 54. Clearance groove; 55. Second sealing ring; 56. Stuffing box; 6. Actuator. Detailed Implementation

[0029] The following is in conjunction with the appendix Figure 1 This application will be described in further detail.

[0030] This application discloses a regulating valve structure.

[0031] Reference Figure 1A regulating valve structure includes a valve body 1, a valve seat 2, a valve stem 3, a valve core 4, a valve cover 5, and an actuator 6 for pushing the valve stem 3 to slide up and down. The valve seat 2 is detachably mounted on the valve body 1, the valve stem 3 is fixedly connected to the valve core 4, the valve core 4 is slidably mounted inside the valve seat 2, the valve seat 2 is detachably connected to the valve cover 5, and the valve stem 3 is slidably mounted on the valve cover 5.

[0032] Reference Figure 1 A connecting bracket 51 is provided on the valve cover 5, and the actuator 6 is installed on the connecting bracket 51. In this embodiment, the actuator 6 is set as a pneumatic diaphragm actuator. The connecting bracket 51 is threadedly connected to the end of the valve cover 5 away from the valve seat 2. A fixing nut 52 is threadedly connected to the valve cover 5, and the lower surface of the fixing nut 52 forms an abutting fit with the upper surface of the connecting bracket 51, thereby fixing the connecting bracket 51 and thus fixing the position of the pneumatic diaphragm actuator.

[0033] Reference Figure 1 In this embodiment, the valve stem 3 and the valve core 4 are integrally formed. The end of the valve stem 3 away from the valve core 4 is threaded to the pneumatic diaphragm actuator. By operating the pneumatic diaphragm actuator, the valve stem 3 is driven to move the valve core 4 up and down along the axial direction of the valve stem 3.

[0034] Reference Figure 1 The valve body 1 is provided with an adapter groove 11 that adapts to the shape and size of the valve seat 2. The valve seat 2 and the adapter groove 11 on the valve body 1 are fitted together. The valve cover 5 is connected to the valve body 1 by bolt thread, and the valve cover 5 and the valve seat 2 are in abutting fit. That is, the valve seat 2 is abutted and limited in the adapter groove 11 by the valve cover 5. Thus, after the operator separates the valve body 1 and the valve cover 5 by turning the bolt, the operator can directly remove the valve seat 2 from the adapter groove 11 of the valve body 1. That is, the operator can easily disassemble and replace the valve seat 2.

[0035] Reference Figure 1 The valve seat 2 is provided with a guide hole 21 to guide the valve core 4 to move up and down inside the valve seat 2, and the valve cover 5 is provided with a clearance hole 53 to avoid the valve stem 3 from sliding, thereby ensuring that the valve core 4 on the valve stem 3 can be accurately guided and slid, and preventing the valve stem 3 and the valve core 4 from shifting position during the up and down sliding process.

[0036] Reference Figure 1 The valve cover 5 is provided with a downward-facing relief groove 54. The cross-section of the relief groove 54 is trapezoidal. The relief groove 54 is used to allow the valve core 4 to slide up and down. The relief hole 53, the relief groove 54 and the guide hole 21 are interconnected. Thus, the relief groove 54 provides sufficient relief space for the valve core 4 to slide up and down, ensuring the smoothness and stability of the valve core 4 during the sliding process.

[0037] Reference Figure 1The valve body 1 is provided with an inlet flow channel 12 and an outlet flow channel 13. An opening and closing port 14 is formed between the inlet flow channel 12 and the outlet flow channel 13. The guide hole 21 is connected to the opening and closing port 14. In actual use, the pneumatic diaphragm actuator drives the valve stem 3 to drive the valve core 4 to open and close the opening and closing port 14, thereby realizing the flow regulation.

[0038] Reference Figure 1 A first sealing ring 22 is provided between the valve body 1 and the valve seat 2. The first sealing ring 22 can reduce the possibility of fluid leakage from the gap between the valve body 1 and the valve seat 2, thereby improving the sealing performance and reliability between the valve body 1 and the valve seat 2.

[0039] Reference Figure 1 A second sealing ring 55 is provided between the valve body 1 and the valve cover 5. The second sealing ring 55 can reduce the possibility of fluid leakage from the gap between the valve body 1 and the valve cover 5, thereby improving the sealing performance and reliability between the valve body 1 and the valve cover 5.

[0040] Reference Figure 1 A stuffing box 56 for adding packing seal is formed between the valve cover 5 and the valve stem 3. A packing sleeve 31 for pressing the packing inside the stuffing box 56 is fitted on the valve stem 3. By utilizing the pressing action of the packing sleeve 31, the packing inside the stuffing box 56 can fit tightly against the valve stem 3, thereby improving the sealing performance between the valve cover 5 and the valve stem 3.

[0041] Reference Figure 1 A packing gland 32 is fitted on the valve stem 3. The packing gland 32 is fixed to the valve cover 5 by bolts. The packing gland 32 is located above the packing sleeve 31 and forms an abutment fit with the packing sleeve 31. By tightening the bolts on the packing gland 32, the packing gland 32 presses the packing sleeve 31 downward, thereby driving the packing sleeve 31 to press the packing in the stuffing box 56 downward, which further improves the sealing between the valve cover 5 and the valve stem 3.

[0042] The implementation principle of this application embodiment is as follows: In actual use, the operator operates the pneumatic diaphragm actuator to drive the valve core 4 to open and close the opening and closing port between the liquid inlet channel 12 and the liquid outlet channel 13, thereby realizing the flow rate regulation. Since the valve seat 2 and the adapter groove 11 on the valve body 1 form an embedded fit, the valve seat 2 is abutted and limited in the adapter groove 11 by the valve cover 5. Thus, after the operator loosens the bolts to separate the valve cover 5 from the valve body 1, the valve seat 2 can be directly removed from the adapter groove 11 of the valve body 1 for maintenance or replacement.

[0043] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A regulating valve structure, characterized in that: The valve includes a valve body (1), a valve seat (2), a valve stem (3), a valve core (4), a valve cover (5), and an actuator (6) for pushing the valve stem (3) to slide up and down. The valve body (1) is provided with an adapter groove (11) for fitting with the valve seat (2). The valve stem (3) is fixedly connected to the valve core (4). The valve seat (2) is detachably connected to the valve cover (5). The valve stem (3) is slidably mounted on the valve cover (5). The valve seat (2) is provided with a guide valve core (4). The valve body (1) is provided with an inlet flow channel (12) and an outlet flow channel (13) inside the valve seat (2). An opening and closing port (14) is formed between the inlet flow channel (12) and the outlet flow channel (13). The guide hole (21) is connected to the opening and closing port (14). The end of the valve stem (3) away from the valve core (4) is connected to the actuator (6). The end of the valve core (4) away from the valve stem (3) is slidably disposed at the opening and closing port (14).

2. The regulating valve structure according to claim 1, characterized in that: A first sealing ring (22) is provided between the valve body (1) and the valve seat (2) to seal the gap between the valve body (1) and the valve seat (2).

3. The regulating valve structure according to claim 1, characterized in that: A second sealing ring (55) is provided between the valve body (1) and the valve cover (5) to seal the gap between the valve body (1) and the valve cover (5).

4. The regulating valve structure according to claim 1, characterized in that: A stuffing box (56) is formed between the valve cover (5) and the valve stem (3), and a stuffing sleeve (31) for pressing the stuffing inside the stuffing box (56) is fitted on the valve stem (3).

5. The regulating valve structure according to claim 4, characterized in that: A packing gland (32) is fitted on the valve stem (3). The packing gland (32) is fixed to the valve cover (5) by bolts. The packing gland (32) is located above the packing sleeve (31) and forms an abutment fit with the packing sleeve (31).

6. The regulating valve structure according to claim 1, characterized in that: The valve cover (5) is provided with a clearance groove (54) for avoiding the valve core (4) from sliding up and down.

7. The regulating valve structure according to claim 1, characterized in that: The valve cover (5) is provided with a connecting bracket (51) and a fixing nut (52) for fixing the connecting bracket (51). The actuator (6) is provided on the connecting bracket (51). The lower surface of the fixing nut (52) and the upper surface of the connecting bracket (51) form an abutting fit.

8. The regulating valve structure according to claim 1, characterized in that: The actuator (6) is configured as a pneumatic diaphragm actuator, which is connected to the end of the valve stem (3) away from the valve core (4).

Images