Stop valve with stable structure

Abstract

The utility model discloses a stop valve with a stable structure, which relates to the technical field of stop valves and comprises a valve body, a valve rod, a fixing cylinder and a positioning mechanism. The fixing cylinder is fixedly connected to the top end of the valve body and arranged outside the valve rod in a sleeving mode, and positioning grooves are formed in the inner wall of the fixing cylinder at equal intervals. The positioning mechanism is arranged in the valve rod and used for being connected with the positioning groove in a clamped mode. According to the stop valve, the arrangement mode that the fixing cylinder is matched with the positioning mechanism is utilized, the positioning plate in the positioning mechanism is clamped with the positioning groove formed in the fixing cylinder, and therefore the valve rod can be limited to rotate easily when being subjected to external force, misoperation caused by the external force is effectively prevented, and due to the design, the safety of the stop valve is enhanced, and the service life of the stop valve is prolonged. In addition, the stable state can be kept after the valve is closed or opened, the valve position change caused by vibration or accidental touch is avoided, clamping connection can be canceled only by pulling the extrusion rod to cancel limiting of the limiting plate, and use is convenient.

Description

Technical Field

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

[0002] Valves are devices that control the flow of fluids and are used to regulate, cut off, or change the direction of medium flow. Common types include gate valves, ball valves, butterfly valves, etc. They are widely used in petroleum, chemical, water treatment and other fields. They have the characteristics of good sealing performance, flexible operation and high pressure resistance, and are an indispensable key component in pipeline systems.

[0003] A gate valve is a type of valve used to cut off or regulate the flow of fluid. It controls opening and closing by moving the valve disc vertically through the valve stem. It has a simple structure, good sealing performance, and is suitable for a variety of media. It is often used in pipelines where strict fluid cutoff is required.

[0004] The existing gate valves do not have external protective mechanisms, which exposes the valve stem to the outside. This makes it susceptible to accidental rotation due to external forces, which may lead to the valve opening or closing unexpectedly. This situation may cause media leakage, which not only affects the normal operation of the system, but may also cause equipment damage or safety accidents, which is quite inconvenient. Utility Model Content

[0005] The purpose of this invention is to provide a structurally stable shut-off valve to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a structurally stable shut-off valve, comprising:

[0007] The valve body has a valve stem rotatably mounted on its top end;

[0008] A fixed cylinder is fixedly connected to the top of the valve body and sleeved on the outside of the valve stem. The inner wall of the fixed cylinder is provided with positioning grooves at equal intervals.

[0009] A positioning mechanism is provided inside the valve stem and is used to engage with the positioning groove.

[0010] Preferably, the positioning mechanism includes:

[0011] An extrusion plate, wherein an extrusion groove is provided inside the valve stem, and the extrusion plate is located inside the extrusion groove;

[0012] An extrusion rod, the end of which is slidably inserted into the inner wall of the extrusion groove, and the extrusion rod is fixedly inserted into the extrusion plate;

[0013] A rack, which is fixedly connected at equal intervals to both sides of the extrusion rod;

[0014] The valve stem has a through groove for the rotation of the gear, and the gear meshes with a rack.

[0015] A positioning plate, which is fixedly connected to a gear and slidably inserted into the inner cavity of a positioning groove;

[0016] A compression spring, which is sleeved on the outside of the compression rod.

[0017] Preferably, one end of the compression spring is fixedly connected to the extrusion plate, and the other end of the compression spring is fixedly connected to the top end of the inner wall of the extrusion groove.

[0018] Preferably, the positioning mechanism further includes:

[0019] Pressing plate, the pressing plate being fixedly connected to the top end of the pressing rod;

[0020] The limiting plate has symmetrical limiting grooves at the bottom end of the pressing plate, and the limiting plate is rotatably connected to the inner cavity of the limiting groove through a rotating shaft.

[0021] Preferably, a groove is formed at the bottom end of the inner wall of the through groove, and a sliding rod is fixedly connected to the bottom end of the inner wall of the groove. The sliding rod is slidably inserted into the inner cavity of the extrusion rod.

[0022] Preferably, a handwheel is fixedly connected to the outer wall of the valve stem, and the outer wall of the handwheel is provided with anti-slip texture.

[0023] The technical effects and advantages of this utility model are as follows:

[0024] This utility model utilizes a combination of a fixed cylinder and a positioning mechanism. The positioning plate in the positioning mechanism engages with the positioning groove in the fixed cylinder, thereby limiting the valve stem from easily rotating under external force and effectively preventing misoperation caused by external force. This design not only enhances the safety of the gate valve but also maintains a stable state after the valve is closed or opened, avoiding changes in valve position caused by vibration or accidental contact. Furthermore, to remove the engagement, simply pull the squeezing rod to release the limiting plate, making it convenient to use. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0026] Figure 2 This is a schematic diagram of the overall front internal structure of this utility model.

[0027] Figure 3 This utility model Figure 2 Enlarged structural diagram at point A in the middle.

[0028] Figure 4 This is a schematic diagram of the internal structure of the limiting plate of this utility model.

[0029] In the diagram: 1. Valve body; 2. Valve stem; 3. Fixed cylinder; 4. Positioning mechanism; 41. Extrusion plate; 42. Extrusion rod; 43. Rack; 44. Gear; 45. Positioning plate; 46. Compression spring; 47. Pressing plate; 48. Limiting plate; 5. Slide rod; 6. Handwheel. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] Example 1

[0032] This utility model provides, for example Figures 1-3 The diagram shows a stable gate valve, comprising a valve body 1, a valve stem 2, a fixed cylinder 3, and a positioning mechanism 4. The valve stem 2 is rotatably mounted on the top of the valve body 1. The fixed cylinder 3 is fixedly connected to the top of the valve body 1 and is sleeved on the outside of the valve stem 2. Positioning grooves are equidistantly opened on the inner wall of the fixed cylinder 3. The positioning mechanism 4 is located inside the valve stem 2 and is used to engage with the positioning grooves. By engaging with the positioning grooves opened on the fixed cylinder 3, the valve stem 2 can be prevented from easily rotating when subjected to external force, effectively preventing misoperation caused by external force. This design not only enhances the safety of the gate valve but also maintains a stable state after the valve is closed or opened, avoiding changes in valve position caused by vibration or accidental contact, and facilitating use.

[0033] Specifically, the positioning mechanism 4 includes a pressing plate 41, a pressing rod 42, a rack 43, a gear 44, a positioning plate 45, and a compression spring 46. The valve stem 2 has an internal pressing groove, and the pressing plate 41 is located inside the pressing groove. The end of the pressing rod 42 is slidably inserted into the inner wall of the pressing groove, and the pressing rod 42 is fixedly inserted into the pressing plate 41. The pressing plate 41 limits the displacement of the pressing rod 42, allowing it to move only vertically through the pressing plate 41. The rack 43 is equidistantly fixedly connected to both sides of the pressing rod 42. The valve stem 2 has an internal through-groove for the gear 44 to rotate, and the gear 44 meshes with the rack 43. The positioning plate 45 is fixedly connected to the gear 44 and slidably inserted into the inner cavity of the positioning groove. Multiple positioning grooves are arranged in a ring, thus allowing the valve stem... 2. When rotated to any angle, precise positioning and fixation are achieved through the cooperation of the positioning plate 45 and the positioning groove, preventing the valve stem 2 from shifting due to external force or vibration, improving the stability and accuracy of valve operation, and ensuring the reliability and safety of the valve under complex working conditions; the compression spring 46 is sleeved on the outside of the extrusion rod 42, one end of the compression spring 46 is fixedly connected to the extrusion plate 41, and the other end of the compression spring 46 is fixedly connected to the top of the inner wall of the extrusion groove. The compression spring 46 is always in a compressed state, so that the extrusion plate 41 can provide a stable downward elastic force on the extrusion rod 42, so that the rack 43 can slide downward without limit, thereby causing the gear 44 to drive the positioning plate 45 to rotate, thereby disengaging from the positioning groove, and the valve stem 2 can be rotated normally to adjust the valve body 1.

[0034] Example 2

[0035] Based on Example 1, such as Figure 4 As shown, the positioning mechanism 4 also includes a pressing plate 47 and a limiting plate 48. The pressing plate 47 is fixedly connected to the top of the pressing rod 42. The cross-section of the pressing plate 47 is C-shaped, which facilitates the determination of the position of the positioning plate 45 and makes it convenient to use. The bottom end of the pressing plate 47 is symmetrically provided with limiting grooves. The limiting plate 48 is rotatably connected to the inner cavity of the limiting groove through a rotating shaft. Under the elastic force of the compression spring 46, the limiting plate 48 is as follows: Figure 4 As shown, the downward displacement of the squeezing rod 42 can be restricted, thereby keeping the positioning plate 45 locked with the positioning groove, which facilitates the restriction of the rotation of the valve rod 2. When it is necessary to rotate the valve rod 2, the pressing plate 47 can be pulled upward first, and the limiting plate 48 can be rotated. Under the elastic force of the compression spring 46, the squeezing rod 42 can be moved downward, thereby releasing the locking and limiting of the valve rod 2, which is convenient for use.

[0036] Furthermore, a groove is provided at the bottom of the inner wall of the through groove, and a slide rod 5 is fixedly connected to the bottom of the inner wall of the groove. The slide rod 5 is slidably inserted into the inner cavity of the extrusion rod 42. The slide rod 5 further plays a limiting role in the extrusion rod 42. The setting of the slide rod 5 enhances the sliding stability of the extrusion rod 42, avoids the problem of mechanism jamming caused by poor sliding, and facilitates use.

[0037] Furthermore, a handwheel 6 is fixedly connected to the outer wall of the valve stem 2. The outer wall of the handwheel 6 is provided with anti-slip texture. The anti-slip texture increases the friction between the handwheel 6 and the operator's hand, making it easier to turn the valve stem 2. It can also be operated stably, especially in humid or oily environments. The anti-slip texture can reduce the wear on the surface of the handwheel 6, extend its service life, and improve the human-machine interaction experience, making it suitable for frequent operation conditions.

[0038] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A structurally stable shut-off valve, characterized in that... ,include: A valve body (1) is provided with a valve stem (2) rotatably mounted on its top end; Fixed cylinder (3), the fixed cylinder (3) is fixedly connected to the top of the valve body (1), the fixed cylinder (3) is sleeved on the outside of the valve stem (2), and the inner wall of the fixed cylinder (3) is provided with positioning grooves at equal intervals; Positioning mechanism (4) is located inside the valve stem (2) and is used to engage the positioning groove.

2. The structurally stable shut-off valve according to claim 1, characterized in that, The positioning mechanism (4) includes: The extrusion plate (41) has an extrusion groove inside the valve stem (2), and the extrusion plate (41) is located inside the extrusion groove; The extrusion rod (42) has its end slidably inserted into the inner wall of the extrusion groove, and the extrusion rod (42) is fixedly inserted into the extrusion plate (41). A rack (43) is fixedly connected at equal intervals to both sides of the extrusion rod (42); The valve stem (2) has a through groove for the rotation of the gear (44), and the gear (44) meshes with the rack (43); Positioning plate (45), the positioning plate (45) is fixedly connected to gear (44), and the positioning plate (45) is slidably inserted into the inner cavity of the positioning groove; A compression spring (46) is sleeved on the outside of the compression rod (42).

3. The structurally stable shut-off valve according to claim 2, characterized in that, One end of the compression spring (46) is fixedly connected to the extrusion plate (41), and the other end of the compression spring (46) is fixedly connected to the top of the inner wall of the extrusion groove.

4. A structurally stable shut-off valve according to claim 2, characterized in that, The positioning mechanism (4) also includes: Press plate (47), which is fixedly connected to the top end of the pressing rod (42); The limiting plate (48) has symmetrically provided limiting grooves at the bottom end of the pressing plate (47), and the limiting plate (48) is rotatably connected to the inner cavity of the limiting groove through a rotating shaft.

5. A structurally stable shut-off valve according to claim 2, characterized in that, The bottom end of the inner wall of the through groove is provided with a groove, and a slide rod (5) is fixedly connected to the bottom end of the inner wall of the groove. The slide rod (5) is slidably inserted into the inner cavity of the extrusion rod (42).

6. A structurally stable shut-off valve according to claim 1, characterized in that, A handwheel (6) is fixedly connected to the outer wall of the valve stem (2), and the outer wall of the handwheel (6) is provided with anti-slip texture.

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