Stop valve for pipeline

Abstract

The utility model discloses a stop valve for a pipeline, and aims to solve the problems that in the prior art, when a stop valve needs to be opened from a closed state, the resistance is large sometimes, a female user often encounters the situation that operation is jammed and laborious, sometimes, the stop valve needs to be quickly closed for throttling, and one circle of 360-degree rotation can be achieved only by screwing the stop valve 4-5 times with the hand each time, so that the use is inconvenient. The manual stop valve comprises a valve body, a valve rod, a valve cover and a manual execution assembly. The valve rod comprises an external thread column, a square head column and a limiting rod body; the manual execution assembly comprises a starting hand wheel, a limiting column, an execution hand wheel and a locking nut. The limiting column is used for limiting the square head through hole; the starting hand wheel comprises a first rim, a first spoke and a first hub; the first hub is provided with a first square-head through hole; the execution hand wheel comprises a second rim, a second spoke and a second hub; and the second hub bag comprises a second square head through hole and an auxiliary rotation execution part.

Description

Technical Field

[0001] This utility model relates to the field of gate valve equipment technology, and in particular to a gate valve for pipelines. Background Technology

[0002] As an important opening and closing control device in pipeline systems, the gate valve achieves linear opening and closing of the medium passage by driving the valve disc through the valve stem, and has the characteristics of excellent sealing performance. Traditional household gate valves generally adopt a handwheel drive structure. The diameter of the traditional handwheel is generally designed in the range of 80-100mm. By rotating the handwheel, the valve stem thread pair moves, thereby controlling the displacement of the valve disc.

[0003] In practical use, sometimes it is necessary to open the shut-off valve from the closed state. The resistance is relatively large, and female users often encounter the situation of being stuck and having difficulty in operation. Sometimes, if you want to quickly close the shut-off valve to throttle, you need to turn it 4-5 times by hand to achieve a full 360-degree rotation. Closing the shut-off valve often requires 8-10 turns, which is inefficient. Utility Model Content

[0004] The purpose of this invention is to provide a shut-off valve for pipelines to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A gate valve for pipelines includes a valve body with a built-in valve disc, a valve stem that drives the valve disc to rise and fall via a threaded connection, a valve cover disposed on the upper part of the valve body and sealed to the valve stem, and a manual actuator that drives the valve stem to rotate.

[0007] The top of the valve stem, from top to bottom, includes an external threaded post, a square-headed post, and a limiting rod.

[0008] The manual actuation assembly, from bottom to top, includes a start handwheel fitted onto a square-headed post, a limit post fitted onto a square-headed post, an actuation handwheel fitted onto a square-headed post, and a locking nut matched and connected to an externally threaded post. The limit post has a limit square-headed through hole matching the square-headed post. The start handwheel includes a first rim, a first spoke, and a first hub. The center of the first hub has a first square-headed through hole matching the square-headed post. The upper and lower end faces of the first hub respectively limit and abut against the bottom end of the limit post and the top surface of the limit rod. The actuation handwheel includes a second rim, a second spoke, and a second hub. The second hub includes a second square-headed through hole matching the square-headed post located at its center and an auxiliary rotation actuation part fixedly installed on the top surface of the second hub. The upper and lower end faces of the second hub respectively limit and abut against the bottom surface of the locking nut and the top surface of the limit post.

[0009] Preferably, the diameter of the first wheel rim is twice or more than that of the second wheel rim, which increases the torque and is suitable for operation with low grip strength.

[0010] Preferably, the diameter of the second wheel rim is 80mm, which is suitable for one-handed operation.

[0011] Preferably, the auxiliary rotary actuator includes a butterfly handle fixedly disposed at the center of the top surface of the second hub; the butterfly handle includes a third head through hole and an arc-shaped handle disposed at the center that matches the square head post. When it is necessary to quickly close the shut-off valve for throttling, compared with manually rotating the handwheel, each turn of the butterfly handle can achieve a half-turn of about 180 degrees, and quickly turning the butterfly handle can achieve the closing operation more quickly and conveniently.

[0012] Preferably, the outer wall of the arc-shaped handle is covered with an anti-slip layer to increase operational reliability.

[0013] Preferably, both the first and second spokes include three evenly distributed straight spokes, which reduces the overall weight, prevents slippage, and facilitates hand grip and force application.

[0014] Preferably, the auxiliary rotary actuator includes a foldable columnar handle disposed on the top surface of the straight spokes near the rim. When it is necessary to quickly close the shut-off valve for throttling, rotating the foldable columnar handle can achieve the closing operation more quickly and conveniently than manually rotating the handwheel.

[0015] Preferably, the top of the foldable cylindrical handle has rounded corners to improve grip comfort.

[0016] Compared with the prior art, the pipeline gate valve of this application has the following advantages:

[0017] This utility model achieves graded adaptation of operating torque and a significant improvement in opening and closing efficiency through innovative dual-wheel cooperative drive structure and optimized operation design, specifically manifested in:

[0018] 1. Based on the differentiated functional design of the start handwheel and the execution handwheel, the lever effect of setting the diameter of the first wheel rim to more than twice that of the second wheel rim provides a multiplied manual torque during the initial opening stage, and can transition from single-handed operation to two-handed operation. This effectively overcomes the jamming problem caused by the large resistance when opening the traditional shut-off valve from the closed state, and is especially suitable for the low grip strength operation needs of female users.

[0019] 2. The innovative butterfly-shaped or foldable cylindrical handle structure creates a multi-dimensional force application point at the top of the actuator handwheel. When rapid closing is required, the operator can achieve a rapid 180° half-turn swing by moving the butterfly handle with one hand, saving the circumferential rotation stroke. The foldable handle, when unfolded, allows for rotational operation, effectively shortening the closing stroke operation time and improving work efficiency.

[0020] 3. The axial constraint structure of the limiting rod and locking nut ensures that the dual-wheel system maintains rigid transmission when subjected to alternating forces. The square hole fit structure of the limiting post eliminates the circumferential displacement tolerance between the handwheel and the valve stem, and the anti-slip layer and straight spoke texture design effectively improve the efficiency of force transmission when applied by hand.

[0021] 4. The modular foldable handle design can be completely stored in the spoke gap when not in use, avoiding the space interference problem caused by traditional extended handles. The rounded corners further optimize the grip comfort and meet ergonomic requirements.

[0022] The above structural innovations maintain the sealing performance of traditional gate valves while constructing a graded torque output system, realizing full-process operation optimization from high torque start-up to rapid throttling and closing, which is particularly suitable for high-frequency and differentiated operation needs in home and light industrial scenarios. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model;

[0024] Figure 2 This is an exploded view of the structure of an embodiment of the present utility model;

[0025] Figure 3 This is a schematic diagram of the connection structure between the valve body, valve stem, and valve cover in an embodiment of this utility model;

[0026] Figure 4 This is a schematic diagram of the start handwheel in an embodiment of the present invention;

[0027] Figure 5 This is a schematic diagram of the structure of the limiting post in an embodiment of this utility model;

[0028] Figure 6 This is a schematic diagram of the structure of the handwheel in the embodiment of the present invention, which adopts a wheel-shaped handle.

[0029] Figure 7 This is a schematic diagram of the structure of the handwheel in this embodiment of the present invention, which adopts a foldable columnar handle shape;

[0030] Figure 8 This is a schematic diagram of the structure when only the handwheel is used in the embodiment of this utility model.

[0031] Reference numerals: 1. Valve body; 2. Valve stem; 21. External threaded post; 22. Square head post; 23. Limiting rod; 4. Valve cover; 5. Starter handwheel; 51. First rim; 52. First spoke; 521. Straight spoke; 53. First hub; 531. First square head through hole; 6. Limiting post; 61. Limiting square head through hole; 7. Actuating handwheel; 71. Second rim; 72. Second spoke; 73. Second hub; 731. Second square head through hole; 74. Auxiliary rotary actuator; 75. Butterfly handle; 751. Third square head through hole; 752. Arc-shaped handle; 76. Foldable columnar handle; 761. Rounded corner; 8. Locking nut. Detailed Implementation

[0032] The following detailed description illustrates the specific implementation method: Example

[0033] like Figure 1-8 As shown in the figure, this embodiment illustrates a shut-off valve for pipelines, including a valve body 1 with a built-in valve disc, a valve stem 2 that drives the valve disc to rise and fall via a threaded connection, a valve cover 4 disposed on the upper part of the valve body 1 and sealed to the valve stem 2, and a manual actuator that drives the valve stem 2 to rotate. The valve stem 2 drives the valve disc to rise and fall via a threaded connection to control the flow of fluid.

[0034] In this embodiment, the top of the valve stem 2 includes, from top to bottom, an external threaded post 21, a square-headed post 22, and a limiting rod 23.

[0035] In this embodiment, the manual execution component, from bottom to top, includes a start handwheel 5 that is limited and sleeved on the square head post 22, a limit post 6 that is limited and sleeved on the square head post 22, an execution handwheel 7 that is limited and sleeved on the square head post 22, and a locking nut 8 that is matched and connected to the external thread post 21; the limit post 6 is provided with a limit square head through hole 61 that matches the square head post 22, and the limit post 6 is used to isolate the force-bearing areas of the start handwheel 5 and the execution handwheel 7. The start handwheel 5 includes a first rim 51, a first spoke 52, and a first hub 53. The first hub 53 has a first square-headed through hole 531 at its center that matches the square-headed post 22, ensuring slip-free torque transmission. The upper and lower end faces of the first hub 53 respectively abut against the bottom end of the limiting post 6 and the top surface of the limiting rod 23, forming an axial limit. The actuation handwheel 7 includes a second rim 71, a second spoke 72, and a second hub 73. The second hub 73 includes a second square-headed through hole 731 at its center that matches the square-headed post 22 and an auxiliary rotation actuation part 74 fixedly disposed on the top surface of the second hub 73. The upper and lower end faces of the second hub 73 respectively abut against the bottom surface of the locking nut 8 and the top surface of the limiting post 6, forming an axial limit. Furthermore, in this embodiment, the diameter of the first rim 51 is twice or more than that of the second rim 71, increasing torque and suitable for low-grip operation. Furthermore, the diameter of the second wheel rim 71 is 80mm, which is suitable for one-handed operation.

[0036] Operation process: When the valve is in the closed state and needs to be opened, the user holds the first rim 51 of the start handwheel 5 and rotates it. Since the diameter of the first rim 51 is much larger than that of a traditional handwheel, the leverage effect amplifies the force applied by the hand, effectively overcoming the jamming problem caused by the large resistance when opening a traditional shut-off valve from the closed state, which is especially suitable for the low grip strength operation needs of female users. Example

[0037] like Figure 1-8 As shown, another embodiment, based on embodiment 1, demonstrates a shut-off valve for pipelines. Further, in this embodiment, the auxiliary rotary actuator 74 includes a butterfly handle 75 fixedly disposed at the center of the top surface of the second hub 73. The butterfly handle 75 includes a third head through-hole 751 matching the square head post 22 and an arc-shaped handle 752 disposed at the center. When it is necessary to quickly close the shut-off valve for throttling, compared to manually rotating the handwheel, each turn of the butterfly handle 75 can achieve a rotation of approximately 180 degrees (half a turn). Quickly turning the butterfly handle 75 allows for a faster and more convenient closing operation.

[0038] Furthermore, in these embodiments, the outer wall of the arc-shaped handle 752 is covered with a silicone anti-slip layer to increase operational reliability. Example

[0039] like Figure 1-8As shown, another embodiment demonstrates a shut-off valve for pipelines based on embodiment 1. Further, in this embodiment, the first spoke 52 and the second spoke 72 each include three evenly distributed straight spokes 521, which reduces the overall weight, prevents slippage, and facilitates hand grip and force application.

[0040] Further explanation: In a further possible implementation of this embodiment, the auxiliary rotation actuator 74 includes a foldable columnar handle 76 disposed on the top surface of the straight spokes 521 near the rim. When it is necessary to quickly close the shut-off valve for throttling, rotating the foldable columnar handle 76 can achieve the closing operation more quickly and conveniently than manually rotating the handwheel. When folded, it is stored in the gap between the straight spokes 521 to avoid interference. Specifically, in this embodiment, the foldable columnar handle 76 can be selected from commonly available handwheel matching models.

[0041] To further explain, in these embodiments, the top of the foldable cylindrical handle 76 is provided with a rounded corner 761 to improve grip comfort.

[0042] The above descriptions are merely embodiments of this utility model, and common knowledge regarding specific structures and characteristics is not elaborated upon here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the structure of this utility model, and these should also be considered within the scope of protection of this utility model. These modifications will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application shall be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A gate valve for pipelines, characterized in that: It includes a valve body with a built-in valve disc, a valve stem that drives the valve disc to rise and fall via a threaded connection, a valve cover located on the upper part of the valve body and sealed to the valve stem, and a manual actuator that drives the valve stem to rotate. The top of the valve stem, from top to bottom, includes an external threaded post, a square-headed post, and a limiting rod body; The manual actuation assembly, from bottom to top, includes a start handwheel fitted onto a square-headed post, a limit post fitted onto a square-headed post, an actuation handwheel fitted onto a square-headed post, and a locking nut matched and connected to an externally threaded post. The limit post has a limit square-headed through hole matching the square-headed post. The start handwheel includes a first rim, a first spoke, and a first hub. The center of the first hub has a first square-headed through hole matching the square-headed post. The upper and lower end faces of the first hub respectively limit and abut against the bottom end of the limit post and the top surface of the limit rod. The actuation handwheel includes a second rim, a second spoke, and a second hub. The second hub includes a second square-headed through hole matching the square-headed post located at its center and an auxiliary rotation actuation part fixedly installed on the top surface of the second hub. The upper and lower end faces of the second hub respectively limit and abut against the bottom surface of the locking nut and the top surface of the limit post.

2. A pipe stop valve according to claim 1, characterized in that: The diameter of the first rim is twice or more than that of the second rim.

3. A pipe stop valve according to claim 2, characterized in that: The diameter of the second rim is 80mm.

4. A pipe stop valve according to claim 3, characterized in that: The auxiliary rotation actuator includes a butterfly-shaped handle fixedly disposed at the center of the top surface of the second hub; the butterfly-shaped handle includes a third head through hole and an arc-shaped handle disposed at the center that matches the square head post.

5. A pipe stop valve according to claim 4, characterized in that: The outer wall of the arc-shaped handle is covered with an anti-slip layer.

6. A pipe stop valve according to claim 3, characterized in that: Both the first and second spokes consist of three evenly distributed straight spokes.

7. A pipe stop valve according to claim 6, characterized in that: The auxiliary rotary actuator includes a foldable columnar handle located on the top surface of the straight spokes near the rim.

8. A gate valve for pipelines according to claim 7, characterized in that: The top of the foldable cylindrical handle has rounded corners.

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