A self-locking valve core for a stop valve with a limit rod reset mechanism

Abstract

This utility model provides a self-locking valve core for a stop valve with a limit rod reset mechanism, including a stop valve body, connecting valve tubes, and a connecting base. Two connecting valve tubes are fixedly disposed on both sides of the outer end face of the stop valve body, and the connecting base is fixedly disposed on the top of the stop valve body. This design achieves rigid locking of the valve's open and closed states through the cooperation of the limit rod and the locking groove of the locking disc, effectively preventing unintended opening and closing due to vibration or accidental contact, significantly improving the safety and reliability of the valve under critical operating conditions. This design also incorporates a sealing gasket at the connection between the locking core base and the threaded rod, combined with the dynamic sealing structure between the valve core and the communicating cavity, forming a two-stage sealing protection, making it particularly suitable for long-term reliable operation under harsh conditions such as high pressure and corrosive media.

Description

Technical Field

[0001] This utility model relates to the field of gate valve technology, specifically a gate valve self-locking valve core with a limit rod reset mechanism. Background Technology

[0002] As a core component of industrial fluid control systems, the gate valve's self-locking performance and flow regulation accuracy directly affect production safety and efficiency.

[0003] In terms of flow control, while existing technologies can adjust the valve core position via threaded transmission, they lack a coordinated design with a self-locking mechanism. Under pipeline vibration or media impact, the valve core is prone to unexpected displacement, leading to flow fluctuations or even accidental closure. For example, a high-pressure shut-off valve failed rapidly under erosion and corrosion due to insufficient hardness of the sealing surface impermeable layer, causing a leakage accident.

[0004] In addition, although traditional angle gate valves achieve fine adjustment through needle valve cores, they have complex structures, high costs, and their self-locking function is mostly an additional module with low integration. Utility Model Content

[0005] (a) Technical problems to be solved

[0006] To address the shortcomings of existing technologies, this utility model provides a self-locking valve core for a stop valve with a limit rod reset mechanism, which solves the problems mentioned in the background art.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, this utility model provides the following technical solution: a self-locking valve core for a stop valve with a limit rod reset mechanism, comprising a stop valve body, connecting valve tubes, and a connecting base. Two connecting valve tubes are fixedly disposed on both sides of the outer end face of the stop valve body, and the connecting base is fixedly disposed on the top of the stop valve body. A disc-shaped flange is fixedly disposed on one end face of each connecting valve tube away from each other. The flange surface has several through-hole threaded holes, which serve as the installation connection. The connecting valve tubes on both sides have valve cavities with outward openings. The stop valve body has a communicating cavity, which communicates with the valve cavities on both sides. A valve core is disposed in the communicating cavity, and the valve core serves as the stop valve.

[0009] Preferably, the top of the connecting base is fixedly provided with a vertically erected annular support plate, and the top of the annular support plate is provided with a plurality of arc-shaped brackets arranged in an annular array.

[0010] Preferably, a support plate is fixedly installed at the top of the arc-shaped bracket, and a rotating shaft that can move up and down is rotatably connected to the center position of the top of the support plate.

[0011] Preferably, a plurality of connecting frames are fixedly connected to the top end of the rotating shaft, the connecting frames are arranged in a circular array, and a circular hand-held turntable is fixedly connected to the tail end of the connecting frames.

[0012] Preferably, a lock cylinder base is fixedly provided at the center of the top of the annular support plate, a threaded rod is fixedly connected to the top of the valve core, the top of the threaded rod passes through the lock cylinder base, and a sealing gasket is provided at the connection position between the lock cylinder base and the threaded rod.

[0013] Preferably, the top end of the threaded rod extends upward and is mounted and connected to the rotating shaft.

[0014] Preferably, the lock cylinder base has a threaded groove, the outer end face of the threaded rod has a thread, and the threaded rod is threadedly connected to the lock cylinder base.

[0015] Preferably, a locking disc is installed and connected to the outer end face of the arc-shaped bracket.

[0016] Preferably, a self-locking base is fixedly provided on one side of the top of the lock cylinder base, and the self-locking base is provided with a rotating groove with an outward opening.

[0017] Preferably, a limiting rod is rotatably connected in the rotating groove, and a limiting lock groove with an outward opening is provided on one side of the outer end face of the lock disc. The limiting rod can be rotated and locked into the limiting lock groove to limit the rotation of the lock disc, thereby achieving self-locking.

[0018] (III) Beneficial Effects

[0019] This utility model provides a self-locking valve core for a stop valve with a limit rod reset mechanism. It possesses the following features:

[0020] Beneficial effects:

[0021] 1. This solution achieves rigid locking of the valve's open and closed states by cooperating with the limiting rod and the limiting locking groove of the locking disc, effectively avoiding unexpected opening and closing caused by vibration or accidental contact, and significantly improving the safety and reliability of the valve under critical operating conditions.

[0022] 2. This solution adds a sealing gasket at the connection between the lock core base and the threaded rod, and works in conjunction with the dynamic sealing structure between the valve core and the connecting cavity to form a two-stage sealing protection, which is particularly suitable for long-term reliable operation under harsh conditions such as high pressure and corrosive media. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the external structure of this utility model;

[0024] Figure 2 This is a schematic diagram of the main structure of this utility model;

[0025] Figure 3This is a top view of the structure of this utility model;

[0026] Figure 4 This is a front view structural diagram of the present utility model;

[0027] Figure 5 This utility model Figure 4 A cross-sectional view along the AA direction.

[0028] In the diagram: 101, valve body of the gate valve; 102, flange; 103, threaded hole; 104, connecting valve pipe; 105, annular support plate; 106, support plate; 107, rotating shaft; 108, connecting frame; 109, hand-held turntable; 110, arc-shaped bracket; 112, connecting base; 113, locking disc; 114, valve cavity; 115, threaded rod; 116, rotating groove; 117, limit rod; 119, valve core; 120, lock core base; 121, communicating cavity; 122, self-locking base; 123, limit lock groove. Detailed Implementation

[0029] This utility model embodiment provides a self-locking valve core for a stop valve with a limit rod reset mechanism, such as... Figure 1-5 As shown, the valve includes a shut-off valve body 101, connecting valve pipes 104, and connecting base 112. Two connecting valve pipes 104 are fixedly installed on both sides of the outer end face of the shut-off valve body 101, and the connecting base 112 is fixedly installed on the top of the shut-off valve body 101. A disc-shaped flange 102 is fixedly installed on one side of the connecting valve pipes 104 away from each other. The surface of the flange 102 is provided with several through-hole threaded holes 103, which serve as the installation and connection. The connecting valve pipes 104 on both sides are provided with valve cavities 114 with outward openings. The shut-off valve body 101 is provided with a connecting cavity 121, which communicates with the valve cavities 114 on both sides. A valve core 119 is provided in the connecting cavity 121, which serves as the shut-off valve.

[0030] It should be further noted that the flange 102 and the threaded hole 103 facilitate connection to the input and output pipes.

[0031] Furthermore, a vertically erected annular support plate 105 is fixedly provided at the top of the connecting base 112, and a number of arc-shaped brackets 110 in annular array are provided at the top of the annular support plate 105.

[0032] It should be further noted that the arc-shaped bracket 110 is arc-shaped.

[0033] Furthermore, a support plate 106 is fixedly installed at the top of the arc-shaped bracket 110, and a rotating shaft 107 that can be raised and lowered is rotatably connected to the center of the top of the support plate 106.

[0034] Furthermore, a number of connecting brackets 108 are fixedly connected to the top of the rotating shaft 107. The connecting brackets 108 are arranged in a circular array, and a circular hand-held turntable 109 is fixedly connected to the tail end of the connecting brackets 108.

[0035] Furthermore, a lock cylinder base 120 is fixedly provided at the center of the top of the annular support plate 105, and a threaded rod 115 is fixedly connected to the top of the valve core 119. The top of the threaded rod 115 passes through the lock cylinder base 120, and a sealing gasket is provided at the connection position between the lock cylinder base 120 and the threaded rod 115.

[0036] Furthermore, the top of the threaded rod 115 extends upward and is mounted and connected to the rotating shaft 107.

[0037] Furthermore, the lock cylinder base 120 is provided with a threaded groove, and the outer end face of the threaded rod 115 is provided with a thread, and the threaded rod 115 is threadedly connected to the lock cylinder base 120.

[0038] Furthermore, a locking disc 113 is installed and connected to the outer end face of the arc-shaped bracket 110.

[0039] It is worth further explaining that when the hand-held turntable 109 is driven to rotate, it can drive the rotating shaft 107 to rotate through the connecting frame 108, and drive the threaded rod 115 to rotate. At this time, the threaded rod 115 plays a role in stabilizing and limiting the rotation through the support plate 106. As the threaded rod 115 rotates and is threadedly connected to the lock disc 113, it drives the threaded rod 115 to move downward along the lock cylinder base 120, and then drives the valve core 119 to move downward and rotate, thereby realizing the cut-off or change of the flow state on both sides of the connecting cavity 121.

[0040] Furthermore, a self-locking base 122 is fixedly provided on one side of the top of the lock cylinder base 120, and a rotating groove 116 with an outward opening is provided inside the self-locking base 122.

[0041] Furthermore, a limiting rod 117 is rotatably connected inside the rotating groove 116, and a limiting lock groove 123 with an outward opening is provided on one side of the outer end face of the locking disc 113. The limiting rod 117 can be rotated and inserted into the limiting lock groove 123 to limit the rotation of the locking disc 113, thereby achieving self-locking.

[0042] When using this solution:

[0043] S1. First, connect the pipes. Fix the input pipe and the output pipe to the flanges 102 on both sides with bolts. The bolts pass through the threaded holes 103 of the flanges 102 and are tightened to achieve a sealed connection between the pipe and the connecting valve pipe 104.

[0044] At this time, the fluid in the input pipe can enter the communication chamber 121 through the valve cavity 114.

[0045] S2. Then the valve is opened by the operator holding the hand-held turntable 109 and rotating it counterclockwise, which drives the rotating shaft 107 to rotate synchronously through the connecting frame 108.

[0046] The rotating shaft 107 drives the threaded rod 115 to rotate. Since the threaded rod 115 meshes with the threaded groove in the lock core base 120, and the rotating shaft 107 is radially limited by the support plate 106, the threaded rod 115 rises in the vertical direction while rotating.

[0047] The threaded rod 115 rises, causing the valve core 119 to move upward, so that the valve core 119 disengages from the sealing surface of the connecting cavity 121, allowing the fluid to flow from the input pipe to the output pipe through the connecting cavity 121.

[0048] S3. When the valve is opened to the required opening degree, push the limit rod 117 towards the lock disc 113 so that it is locked into the limit lock groove 123.

[0049] At this time, the limit rod 117 prevents the locking disc 113 from rotating through mechanical interference, thereby limiting the rotation of the hand-held turntable 109, achieving rigid locking of the valve core 119 position, and preventing the valve from being accidentally closed due to vibration or misoperation.

[0050] S4. Valve closing and self-locking release procedure: When unlocking, pull the limit rod 117 outward to disengage it from the limit lock groove 123 and return it to the rotating groove 116.

[0051] Closing operation: Rotate the hand dial 109 clockwise, and drive the threaded rod 115 to rotate and move downward through the transmission mechanism, pushing the valve core 119 to press against the sealing surface of the connecting cavity 121, cutting off the fluid passage;

[0052] Secondary self-locking: After closing, the limit rod 117 can be pushed again to engage with the limit lock groove 123 of the lock disc 113 to prevent the valve from opening unexpectedly.

[0053] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A stop valve self-locking valve core with a limiting rod reset mechanism, comprising a stop valve valve body (101), a connecting valve pipe (104) and a connecting base (112), characterized in that: Two connecting valve pipes (104) are fixedly disposed on both sides of the outer end face of the shut-off valve body (101). The connecting base (112) is fixedly disposed on the top of the shut-off valve body (101). Flanges (102) are fixedly disposed on the opposite end face of the connecting valve pipes (104) on both sides. The surface of the flange (102) is provided with several threaded holes (103) with openings through and communicating. The connecting valve pipes (104) on both sides are provided with valve cavities (114) with openings facing outward. The shut-off valve body (101) is provided with a communicating cavity (121). The communicating cavity (121) communicates with the valve cavities (114) on both sides. A valve core (119) is provided in the communicating cavity (121).

2. The self-locking valve plug of a stop valve with a limiting rod reset mechanism according to claim 1, characterized in that: The top of the connecting base (112) is fixedly provided with an annular support plate (105), and the top of the annular support plate (105) is provided with several annular arrays of arc-shaped brackets (110).

3. The self-locking valve plug of a stop valve with a limiting rod reset mechanism according to claim 2, characterized in that: The top of the arc-shaped bracket (110) is fixedly installed with a support plate (106), and a rotating shaft (107) is rotatably connected to the center of the top of the support plate (106).

4. The self-locking valve plug of a stop valve with a limiting rod return mechanism according to claim 3, characterized in that: The top end of the rotating shaft (107) is fixedly connected to several connecting frames (108), which are arranged in a circular array. The tail end of the connecting frame (108) is fixedly connected to a circular hand-held turntable (109).

5. The self-locking valve plug of a stop valve with a limiting rod return mechanism according to claim 4, characterized in that: A lock cylinder base (120) is fixedly provided at the center of the top of the annular support plate (105). A threaded rod (115) is fixedly connected to the top of the valve core (119). The top of the threaded rod (115) passes through the lock cylinder base (120). A sealing gasket is provided at the connection position between the lock cylinder base (120) and the threaded rod (115).

6. The self-locking valve plug of a stop valve with a limiting rod return mechanism according to claim 5, characterized in that: The top end of the threaded rod (115) extends upward and is mounted and connected to the rotating shaft (107).

7. The self-locking valve plug of a stop valve with a limiting rod return mechanism according to claim 6, characterized in that: The lock cylinder base (120) is provided with a threaded groove, and the outer end face of the threaded rod (115) is provided with a thread, and the threaded rod (115) is threadedly connected to the lock cylinder base (120).

8. The self-locking valve plug of a stop valve with a limiting rod return mechanism according to claim 7, characterized in that: A locking disc (113) is installed and connected to the outer end face of the arc-shaped bracket (110).

9. A self-locking valve core with a limit rod reset mechanism for a stop valve according to claim 8, characterized in that: A self-locking base (122) is fixedly provided on one side of the top of the lock cylinder base (120), and a rotating groove (116) with an outward opening is provided inside the self-locking base (122).

10. The self-locking valve plug of a stop valve with a limiting rod return mechanism according to claim 9, characterized in that: A limiting rod (117) is rotatably connected inside the rotating groove (116). A limiting lock groove (123) with an outward opening is provided on one side of the outer end face of the locking disc (113). The limiting rod (117) can be rotated and inserted into the limiting lock groove (123) to limit the rotation of the locking disc (113), thereby achieving self-locking.

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