Valve opening and closing device

Abstract

This utility model discloses a valve opening and closing device, relating to the field of valve technology. Its main purpose is to reduce the torque required for manual operation when opening and closing valves remotely. The main technical solution of this utility model is: a valve opening and closing device, comprising: a housing, a driving gear and a driven gear located within the housing, wherein the driving gear meshes with the driven gear, and the diameter of the driving gear is smaller than the diameter of the driven gear; wherein the axle of the driving gear is connected to a control lever via a universal joint, and the axle of the driven gear is connected to the valve stem of the valve.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, and in particular to a valve opening and closing device. Background Technology

[0002] In the chemical industry, valves are key components for controlling fluid flow, with ball valves being the most common type. Valves are typically operated manually using a handle.

[0003] In terms of manual operation, traditional valve handwheels are usually fixed directly to the top of the valve stem. Operators need to stand directly above or in front of the valve and rotate the handwheel vertically or horizontally to open or close the valve. This one-way fixed operation method is feasible in environments with ample space, but there are significant space limitations in many chemical plants. Therefore, it is necessary to design a valve stem drive device with an adjustable angle.

[0004] Therefore, in the prior art, there are valve remote operation mechanisms. The docking end and valve stem of such mechanisms are often concentrically docked. The docking end needs to output a certain torque to drive the valve stem to rotate. The torque output by the hand end of the operator holding this operating mechanism is generally greater than the torque of the docking end in order to achieve the operation purpose. This makes the operation relatively strenuous for the operator. Utility Model Content

[0005] In view of this, the present invention provides a valve opening and closing device, the main purpose of which is to reduce the torque required by personnel when opening and closing valves remotely, and to improve the convenience of valve opening and closing operations.

[0006] To achieve the above objectives, this utility model mainly provides the following technical solutions: This utility model provides a valve opening and closing device, which includes: a housing, a driving gear and a driven gear located inside the housing, wherein the driving gear meshes with the driven gear, and the diameter of the driving gear is smaller than the diameter of the driven gear; The axle of the driving gear is connected to the control lever via a universal joint, and the axle of the driven gear is connected to the valve stem.

[0007] The purpose of this utility model and the technical problems to be solved can be further achieved by the following technical measures.

[0008] Optionally, the axle end of the driven gear is fixedly connected to the snap-fit ​​block, the snap-fit ​​block is provided with a snap-fit ​​groove, and the snap-fit ​​groove is engaged with the valve stem of the valve.

[0009] Optionally, it also includes two stabilizing mechanisms, which are symmetrically arranged on opposite sides of the housing. Each stabilizing mechanism includes a guide rod, a guide sleeve, and a connecting rod. One end of the guide rod is fixedly connected to the side wall of the housing, and the guide sleeve is sleeved on the other end of the guide rod. One end of the connecting rod is fixedly connected to the guide sleeve, and the other end is fixedly connected to an annular orifice plate. The annular orifice plate is sleeved on the flange fixing bolt of the valve.

[0010] Optionally, a limiting pin is also included. The side wall of the guide sleeve is provided with a threaded through hole, and the limiting pin is threadedly connected to the threaded through hole to make the limiting pin abut against the other end of the guide rod.

[0011] Optionally, the other end of the guide rod is fixedly connected to the baffle to prevent the guide sleeve from detaching from the guide rod.

[0012] By employing the above technical solution, this utility model has at least the following advantages: The axles of the driving gear and the driven gear are respectively mounted in the housing via bearings. When a person holds the handwheel at the end of the control lever, the driving gear rotates, which in turn drives the driven gear to rotate. During the rotation of the driven gear, the point of force applied by the driving gear to the driven gear is located at the edge of the driven gear and along the tangential direction. The product of this force and the radius of the driven gear is the first torque that needs to be applied to the driven gear. The product of the reaction force (equal in magnitude to the driving force) and the radius of the driving gear is the second torque required to drive the driving gear. However, the diameter of the driving gear is smaller than that of the driven gear, so the second torque is less than the first torque. When the torque required to drive the valve stem is constant, the torque required to drive the axle of the driving gear is less than the torque required to drive the valve stem. This reduces the torque required to be output by the person holding the handwheel at the end of the control lever, making it more convenient to use compared to existing technologies. Attached Figure Description

[0013] Figure 1 A schematic diagram of the structure of a valve opening and closing device provided in an embodiment of this utility model; Figure 2 This is a diagram showing the fit between the driving gear and the driven gear. Figure 3 for Figure 1 Enlarged view of section A; Figure 4 for Figure 1 Enlarged view of section B.

[0014] The reference numerals in the accompanying drawings include: housing 1, driving gear 2, driven gear 3, universal joint 4, control lever 5, valve 6, valve stem 7, snap-fit ​​block 8, guide rod 9, guide sleeve 10, connecting rod 11, annular plate 12, fixing bolt 13, limit pin 14, and baffle 15. Detailed Implementation

[0015] To further illustrate the technical means and effects adopted by this utility model to achieve its intended purpose, the specific implementation methods, structures, features, and effects according to this utility model application are described in detail below with reference to the accompanying drawings and preferred embodiments. In the following description, different "embodiments" or "embodiments" do not necessarily refer to the same embodiment. Furthermore, specific features, structures, or characteristics in one or more embodiments can be combined in any suitable form.

[0016] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0017] like Figure 1 and Figure 2 As shown, an embodiment of the present invention provides a valve opening and closing device, which includes: a housing 1, a driving gear 2 and a driven gear 3 located in the housing 1, the driving gear 2 meshing with the driven gear 3, and the diameter of the driving gear 2 being smaller than the diameter of the driven gear 3; The axle of the driving gear 2 is connected to the control lever 5 via a universal joint 4, and the axle of the driven gear 3 is connected to the valve stem 7 of the valve 6.

[0018] The valve opening and closing device works as follows: The axles of the driving gear 2 and the driven gear 3 are respectively mounted in the housing 1 through bearings. When a person holds the handwheel at the end of the control lever 5, the driving gear 2 is rotated. The driving gear 2 drives the driven gear 3 to rotate. During the rotation of the driven gear 3, the point of force applied by the driving gear 2 to the driven gear 3 is located at the edge of the driven gear 3 and along the tangential direction. The product of this force F1 and the radius of the driven gear 3 is the first torque that needs to be applied to the driven gear 3. The product of the reaction force F2 (the reaction force F2 is equal in magnitude and opposite in direction to the force F1) and the radius of the driving gear 2 is the second torque that needs to be output to drive the driving gear 2. However, the diameter of the driving gear 2 is smaller than the diameter of the driven gear 3, so the second torque is less than the first torque. When the torque required to drive the valve stem 7 is constant, the torque required to drive the axle of the driving gear 2 is less than the torque required to drive the valve stem 7. This reduces the torque required to be output by the person holding the handwheel at the end of the control lever 5, making it more convenient to use compared to the prior art.

[0019] Specifically, the diameter of the driving gear 2 is one-quarter of the diameter of the driven gear 3.

[0020] Specifically, one end of the drive gear 2 shaft passes through one side wall of the housing 1 and is connected to one end of the universal joint 4. One end of the control lever 5 is connected to the other end of the universal joint 4, and the other end of the control lever 5 is connected to the handwheel, which facilitates power transmission and also makes angle adjustment convenient. One end of the driven gear 3 shaft passes through the other side wall of the housing 1 and is connected to the valve stem 7 of the valve 6. The valve 6 is a ball valve. like Figure 1 As shown, in a specific embodiment, the axle end of the driven gear 3 is fixedly connected to the upper end face of the snap-fit ​​block 8, and the lower end face of the snap-fit ​​block 8 is provided with a snap-fit ​​groove, which is connected to the valve stem 7 of the valve 6.

[0021] In this embodiment, specifically, the slot is engaged with the end of the valve stem 7 of the valve 6. The end face of the valve stem 7 of the ball valve is quadrilateral, and the inner edge shape of the slot matches the end face shape of the valve stem 7. In this way, the locking block 8 can drive the valve stem 7 to rotate, and at the same time, it can facilitate the locking block 8 to disengage from the valve stem 7, so as to remove the device from the valve body 6.

[0022] like Figure 1 As shown, in a specific embodiment, it also includes two stabilizing mechanisms, which are symmetrically arranged on opposite sides of the housing 1. Each stabilizing mechanism includes a guide rod 9, a guide sleeve 10, and a connecting rod 11. One end of the guide rod 9 is fixedly connected to the side wall of the housing 1, and the guide sleeve 10 is sleeved on the other end of the guide rod 9. One end of the connecting rod 11 is fixedly connected to the guide sleeve 10, and the other end is fixedly connected to the annular orifice plate 12. The annular orifice plate 12 is sleeved on the flange fixing bolt 13 of the valve 6.

[0023] like Figure 1 and Figure 4 As shown, in this embodiment, specifically, when using this device, the guide sleeve 10 is first moved to the far end of the housing 1 to ensure that when the slot is aligned with the end of the valve stem 7, the fixing bolt 13 of the valve 6 relative to the flange face is located between the annular orifice plates 12 of the two stabilizing mechanisms. At this time, the two guide sleeves 10 are moved in the opposite direction so that the two annular orifice plates 12 are respectively fitted with the fixing bolts 13, and the nuts are tightened to achieve the purpose of fixing the annular orifice plates 12. At this time, the guide rod 9 and the housing 1 can no longer deviate relative to the valve 6 body, creating conditions for the stable rotation of the driving gear 2 and the driven gear 3.

[0024] Specifically, the cross-section of the guide rod 9 is rectangular, and the inner edge shape of the guide sleeve 10 matches the cross-sectional shape of the guide rod 9.

[0025] like Figure 1 and Figure 3As shown, in a specific embodiment, a limiting pin 14 is also included. The side wall of the guide sleeve 10 is provided with a threaded through hole. The limiting pin 14 is threadedly connected to the threaded through hole and is used to make the limiting pin 14 abut against the other end of the guide rod 9.

[0026] In this embodiment, based on the fixed arc-shaped hole plate with a nut, the limiting pin 14 is screwed into the threaded through hole, and the limiting pin 14 abuts against the other end of the guide rod 9, further fixing the positional relationship between the guide sleeve 10 and the guide rod 9.

[0027] like Figure 1 and Figure 3 As shown, in a specific embodiment, the other end of the guide rod 9 is fixedly connected to the baffle 15 to prevent the guide sleeve 10 from detaching from the guide rod 9.

[0028] In this embodiment, specifically, when the device is not in use, even if the guide sleeve 10 slides to the other end of the guide rod 9, the baffle 15 prevents the guide sleeve 10 from disengaging from the guide rod 9, ensuring the integrity of the connection of multiple components of the device, preventing component loss, and facilitating the next use of the device.

[0029] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A valve opening and closing device, characterized in that, include: A housing, a driving gear and a driven gear located within the housing, the driving gear meshing with the driven gear, the diameter of the driving gear being smaller than the diameter of the driven gear; The axle of the driving gear is connected to the control lever via a universal joint, and the axle of the driven gear is connected to the valve stem.

2. The valve opening and closing device according to claim 1, characterized in that, The axle end of the driven gear is fixedly connected to the snap-fit ​​block, which has a snap-fit ​​groove that engages with the valve stem of the valve.

3. The valve opening and closing device according to claim 1, characterized in that, It also includes two stabilizing mechanisms, which are symmetrically arranged on opposite sides of the housing. Each stabilizing mechanism includes a guide rod, a guide sleeve, and a connecting rod. One end of the guide rod is fixedly connected to the side wall of the housing, and the guide sleeve is sleeved on the other end of the guide rod. One end of the connecting rod is fixedly connected to the guide sleeve, and the other end is fixedly connected to an annular orifice plate. The annular orifice plate is sleeved on the flange fixing bolts of the valve.

4. The valve opening and closing device according to claim 3, characterized in that, It also includes a limiting pin, and the side wall of the guide sleeve is provided with a threaded through hole. The limiting pin is threadedly connected to the threaded through hole and is used to make the limiting pin abut against the other end of the guide rod.

5. The valve opening and closing device according to claim 3, characterized in that, The other end of the guide rod is fixedly connected to the baffle to prevent the guide sleeve from detaching from the guide rod.

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