High-pressure stop valve with power assisting structure

Abstract

The utility model relates to the technical field of stop valves, in particular to a high-pressure stop valve with a power assisting structure, which comprises a valve body, a valve rod is connected onto the valve body, a hand wheel is fixedly connected to the outside of the valve rod, a fixing frame is detachably connected to the outside of the valve body, and a rotary drum is rotatably connected to the bottom of the fixing frame. According to the valve body, after the fixing frame is installed on the valve body, when the hand wheel needs to be rotated, the driving assembly can drive the rotating drum to rotate, the rotating drum drives the positioning rod to rotate, the positioning rod is driven to rotate, the positioning rod is driven to rotate, the positioning rod is driven to rotate, the positioning rod is driven to rotate, the positioning rod is driven to rotate, and the positioning rod is driven to rotate. And the positioning rod drives the hand wheel to rotate, so that the hand wheel is assisted, and a worker can start and stop the valve body conveniently.

Description

Technical Field

[0001] This utility model relates to the field of gate valve technology, and in particular to a high-pressure gate valve with an auxiliary structure. Background Technology

[0002] Gate valves can quickly cut off airflow in emergencies to prevent leakage accidents. In the steam system of thermal power plants, they play a crucial role in regulating steam flow and ensuring the normal operation of power generation equipment. Under these operating conditions, the sealing performance, reliability, and operational performance of the gate valve are directly related to the safety and efficiency of the entire production system. Once the valve fails, it may cause media leakage, equipment damage, or even catastrophic accidents. Therefore, high-performance gate valves are a key guarantee for industrial production.

[0003] However, existing gate valves have significant operational shortcomings, particularly the lack of power-assisted operation, which leads to numerous problems. Traditional gate valves primarily rely on manual operation via a handwheel to directly drive the valve stem. Under high-pressure, large-diameter conditions, the valve sealing surface experiences immense pressure, resulting in extremely high handwheel operating torque. For example, when the pipeline pressure reaches 10 MPa and the valve diameter is DN300, the operator needs to apply a torque exceeding 150 N·m to turn the handwheel. This often requires multiple people or the use of tools such as extended wrenches, which not only consumes a lot of physical strength and has extremely low operational efficiency but also poses a risk of injury due to excessive force. Utility Model Content

[0004] To address the technical problem that existing shut-off valves lack an assist function, this utility model provides a high-pressure shut-off valve with an assist structure.

[0005] The technical solution adopted by this utility model is: a high-pressure shut-off valve with an assist structure, including a valve body, a valve stem connected to the valve body, a handwheel fixedly connected to the outside of the valve stem, a fixed frame detachably connected to the outside of the valve body, a rotating cylinder rotatably connected to the bottom of the fixed frame, a positioning hole provided at the bottom of the rotating cylinder, a positioning rod fixedly connected to the top of the handwheel, and a drive assembly for driving the rotating cylinder to rotate provided at the top of the fixed frame.

[0006] In one embodiment, both the positioning rod and the positioning hole are polygonal structures.

[0007] In one embodiment, a support plate is fixedly connected to both ends of the valve body, and the support plate has an insertion hole. Spring plates are fixedly connected to both sides of the bottom of the fixed frame, and an insertion plate is fixedly connected to one end of the spring plate, which is inserted into the insertion hole.

[0008] In one embodiment, the drive assembly includes a gear rotatably connected to the top of a fixed frame and a rack disposed outside the gear. A fixed frame is fixedly connected to the outside of the fixed frame, and a cylinder is fixedly connected to the outside of the fixed frame. A slider is fixedly connected to the output end of the cylinder, and the slider is fixedly connected to the rack.

[0009] In one embodiment, a guide rod is fixedly connected to the outside of the fixing frame, and the guide rod passes through the slider.

[0010] In one embodiment, both the insert plate and the socket are rectangular structures.

[0011] In one embodiment, the fixing frame is a U-shaped structure.

[0012] The beneficial effects of this utility model are as follows: Compared with the prior art, in this utility model, after the fixed frame is installed on the valve body, when the handwheel needs to be turned, the rotating drum can be driven to rotate by the drive component. The rotating drum drives the positioning rod to rotate, and the positioning rod drives the handwheel to rotate, thereby providing assistance to the handwheel and making it convenient for workers to start and stop the valve body. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model;

[0014] Figure 2 This is a schematic diagram of the valve body in this utility model;

[0015] Figure 3 This is a schematic diagram of the positioning rod in this utility model.

[0016] Figure 4 This is a schematic diagram of the structure of the fixed frame in this utility model;

[0017] Figure 5 This is a schematic diagram of the structure of the transfer cylinder of this utility model.

[0018] The following are marked in the diagram: 1. Valve body; 2. Valve stem; 3. Handwheel; 4. Positioning rod; 5. Support plate; 6. Fixing frame; 7. Insert plate; 8. Spring plate; 9. Rotary drum; 10. Insertion hole; 11. Positioning hole; 12. Fixing bracket; 13. Cylinder; 14. Slider; 15. Rack; 16. Guide rod; 17. Gear. Detailed Implementation

[0019] In the description of this utility model, it should be noted that the terms "front", "up", "down", "left", "right", "vertical", "horizontal", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0020] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0021] The following is in conjunction with the appendix Figure 1-5 The present invention will be further described below.

[0022] To address the problems existing in the background technology, this application proposes the following technical solution: A high-pressure shut-off valve with an assisted structure, comprising a valve body 1, a valve stem 2 connected to the valve body 1, a handwheel 3 fixedly connected to the outside of the valve stem 2, and a fixed frame 6 detachably connected to the outside of the valve body 1. The fixed frame 6 has a U-shaped structure, and a rotating cylinder 9 is rotatably connected to the bottom of the fixed frame 6. The bottom of the rotating cylinder 9 is provided with a positioning hole 11. A positioning rod 4 is fixedly connected to the top of the handwheel 3. Both the positioning rod 4 and the positioning hole 11 are polygonal structures. The top of the fixed frame 6 is provided with a drive assembly for driving the rotating cylinder 9 to rotate. Under high-pressure conditions (such as in oil extraction, coal chemical industry, etc.), the opening and closing of traditional shut-off valves requires overcoming huge sealing friction and medium pressure. Operators often need to use tools such as long-handled wrenches to turn the handwheel 3, which is not only inefficient but also poses safety hazards. The fixed frame 6 of this device is made of high-strength alloy casting, and the U-shaped structure design ensures a stable connection with the valve body 1 while facilitating quick installation and disassembly. The polygonal fit (such as hexagonal or spline) between the rotating drum 9 and the positioning rod 4 achieves efficient torque transmission. Compared with the traditional circular connection, it can withstand 50% more torsional force, ensuring that power transmission does not slip under high pressure. The detachable design allows the assist structure to be added or removed as needed. For example, the fixing frame 6 can be removed during routine maintenance without affecting the normal operation of the valve; it can be quickly installed in emergency situations to provide additional power support. In this utility model, after the fixing frame 6 is installed on the valve body 1, when the handwheel 3 needs to be turned, the rotating drum 9 can be driven to rotate through the drive component. The rotating drum 9 drives the positioning rod 4 to rotate, and the positioning rod 4 drives the handwheel 3 to rotate, thereby assisting the handwheel 3 and making it convenient for workers to start and stop the valve body 1.

[0023] In this embodiment, support plates 5 are fixedly connected to both ends of the valve body 1. The support plates 5 have insertion holes 10. Spring plates 8 are fixedly connected to both sides of the bottom of the fixing frame 6. One end of each spring plate 8 is fixedly connected to an insertion plate 7, which is inserted into the insertion hole 10. Both the insertion plate 7 and the insertion hole 10 are rectangular structures. The support plates 5 are integrally formed with the valve body 1 using a forging process, ensuring sufficient strength to support the assist device. The spring plates 8 are made of 65Mn spring steel, and after quenching and tempering, their elastic modulus reaches 200GPa, providing stable preload. The rectangular design of the insertion plate 7 and the insertion hole 10 ensures directional stability during installation and effectively transmits torque, preventing rotation under stress. When the insertion plate 7 is inserted into the insertion hole 10, the spring plate 8 undergoes elastic deformation, providing continuous clamping force and ensuring a tight connection between the fixing frame 6 and the valve body 1. In a vibration environment, the elastic buffering effect of the spring plate 8 reduces component fatigue and extends service life; disassembly is convenient, facilitating equipment maintenance and upgrades.

[0024] In this embodiment, the drive assembly includes a gear 17 rotatably connected to the top of the fixed frame 6 and a rack 15 disposed outside the gear 17. A fixed frame 12 is fixedly connected to the outside of the fixed frame 6, and a cylinder 13 is fixedly connected to the outside of the fixed frame 12. A slider 14 is fixedly connected to the output end of the cylinder 13, and the slider 14 is fixedly connected to the rack 15. A guide rod 16 is fixedly connected to the outside of the fixed frame 12, and the guide rod 16 passes through the slider 14. The drive assembly achieves efficient conversion from linear motion to rotary motion through the combination of "gear 17, rack 15, and cylinder 13". The gear 17 and rack 15 are made of 20CrMnTi alloy steel. The fit between the guide rod 16 and the slider 14 (clearance tolerance ±0.03mm) ensures the accuracy of the linear motion of the rack 15 and prevents jamming caused by lateral forces. Compared with traditional electric power assist devices, this design has significant advantages: fast response speed, allowing for quick handling of emergency situations; compact structure, small footprint, suitable for installation in narrow pipe areas.

[0025] The usage method of this embodiment is as follows:

[0026] Take the fixed frame 6, insert the positioning hole 11 at the bottom of the rotating cylinder 9 into the positioning rod 4, and then move the spring plate 8 to insert the insert plate 7 into the insertion hole 10 on the outside of the support plate 5. In this way, the fixed frame 6 can be supported and installed.

[0027] When it is necessary to operate the handwheel 3, the output direction of the cylinder 13 can be controlled to drive the rack 15 to slide, the rack 15 drives the gear 17 to rotate, the gear 17 drives the rotating drum 9 to rotate, the rotation drives the positioning rod 4 to rotate, the positioning rod 4 drives the handwheel 3 to rotate, and at the same time, the handwheel 3 can be operated manually to rotate.

[0028] The handwheel 3 drives the valve stem 2 to rotate, thereby controlling the start and stop of the valve body 1. The positioning rod 4 can slide within the positioning hole 11 without affecting the raising and lowering of the handwheel 3, thus achieving steering assistance of the handwheel 3.

[0029] All standard parts used in this utility model can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art. In addition, the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here. The contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0030] Although embodiments of the present invention have been shown and described, the scope of the present invention will be defined by the appended claims and their equivalents for those skilled in the art.

Claims

1. A high-pressure shut-off valve with an assisted structure, comprising a valve body (1), a valve stem (2) connected to the valve body (1), and a handwheel (3) fixedly connected to the outside of the valve stem (2), characterized in that, The valve body (1) is detachably connected to a fixed frame (6), and a rotating cylinder (9) is rotatably connected to the bottom of the fixed frame (6). The bottom of the rotating cylinder (9) is provided with a positioning hole (11). The top of the handwheel (3) is fixedly connected with a positioning rod (4), and the top of the fixed frame (6) is provided with a drive assembly for driving the rotating cylinder (9) to rotate.

2. The high-pressure shut-off valve with an assist structure according to claim 1, characterized in that, Both the positioning rod (4) and the positioning hole (11) are polygonal structures.

3. A high-pressure shut-off valve with an assist structure according to claim 1, characterized in that, Both ends of the valve body (1) are fixedly connected to support plates (5), and the support plates (5) are provided with insertion holes (10). Both sides of the bottom of the fixed frame (6) are fixedly connected to spring plates (8), and one end of the spring plates (8) is fixedly connected to a plug plate (7). The plug plate (7) is inserted into the insertion hole (10).

4. A high-pressure shut-off valve with an assist structure according to claim 1, characterized in that, The drive assembly includes a gear (17) rotatably connected to the top of the fixed frame (6) and a rack (15) disposed outside the gear (17). A fixed frame (12) is fixedly connected to the outside of the fixed frame (6). A cylinder (13) is fixedly connected to the outside of the fixed frame (12). A slider (14) is fixedly connected to the output end of the cylinder (13). The slider (14) is fixedly connected to the rack (15).

5. A high-pressure shut-off valve with an assist structure according to claim 4, characterized in that, The fixed frame (12) is externally fixedly connected to a guide rod (16), which passes through the slider (14).

6. A high-pressure shut-off valve with an assist structure according to claim 3, characterized in that, Both the insert plate (7) and the socket (10) are rectangular structures.

7. A high-pressure shut-off valve with an assist structure according to claim 1, characterized in that, The fixed frame (6) has a U-shaped structure.

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