Stop valve

Abstract

The utility model discloses a stop valve, which comprises a valve body, a valve core, a valve core and a valve core, the valve cover is arranged to cover the valve body mounting opening; the valve rod is mounted on the valve cover and one end extends into the valve body; the valve clack is arranged in the valve body and is connected to the valve rod; the hand wheel is rotationally arranged on the valve cover and is connected with the valve rod to drive the valve rod to reciprocate along the axis; the anti-rotation assembly is arranged to be used for limiting circumferential rotation of the valve rod in the moving process; the locking assembly is provided with a first matching feature and a second matching feature, the first matching feature is arranged on the valve cover, the second matching feature is arranged on the valve rod and moves along with the valve rod, and the first matching feature is matched with the second matching feature to limit the movement of the valve rod; and the control mechanism is used for controlling whether the first matching feature and the second matching feature are matched or not. The utility model has the following advantages and effects: the utility model can avoid misoperation so as to improve the control safety of the valve and adapt to harsh working conditions and environments.

Description

Technical Field

[0001] The utility model relates to a valve, in particular to a stop valve. Background Art

[0002] The stop valve, also known as the gate valve, is a forced sealing valve. Therefore, when the valve is closed, pressure must be applied to the valve disc to force the sealing surface to prevent leakage. When the medium enters the valve from below the valve disc, the resistance that the operating force needs to overcome is the friction between the valve stem and the packing and the thrust generated by the pressure of the medium. The force to close the valve is greater than the force to open the valve, so the diameter of the valve stem must be large, otherwise the valve stem will bend.

[0003] The application field and application conditions of the stop valve are very wide, and in many strict pipeline systems, there are strict control requirements for the control state of the valve. In order to prevent others from misoperating, the valves used in the above pipeline systems must have a locking structure, that is, when the staff adjusts the control state of the valve, the valve is locked through the locking structure on the valve to avoid misoperation caused by accidental triggering by unrelated personnel. There are many types of stop valves with locking structures on the market, and in order to avoid the existing stop valve locking structure, the present invention is born. Utility Model Content

[0004] The utility model aims to provide a stop valve, which can avoid misoperation, thereby improving the control safety of the valve and adapting to harsh working conditions.

[0005] The above technical objectives of the utility model are achieved through the following technical solutions: a stop valve, comprising: a valve body, configured to allow medium to pass through; a valve cover, configured to cover the valve body installation port; a valve stem, installed on the valve cover and one end extending into the valve body; a valve disc, arranged in the valve body and connected to the valve stem; a hand wheel, rotatably arranged on the valve cover and connected to the valve stem to drive the valve stem to reciprocate along the axis; an anti-rotation component, configured to limit the circumferential rotation of the valve stem during movement; a locking component, configured to have a first matching feature and a second matching feature, the first matching feature is arranged on the valve cover, the second matching feature is arranged on the valve stem and moves with the valve stem, and the first matching feature matches the second matching feature to limit the movement of the valve stem; a control mechanism, configured to control whether the first matching feature and the second matching feature form a match.

[0006] By adopting the above technical solution, the control mechanism controls the first matching feature and the second matching feature so that they do not match, so that the hand wheel can be controlled to adjust the opening of the valve through the valve stem. After the valve is adjusted to the required opening, the control mechanism controls the first matching feature and the second matching feature to match to achieve locking of the valve stem, thereby avoiding the problem of misoperation caused by unintentional triggering of the hand wheel by unrelated personnel, and also avoiding the problem of loose opening of the valve due to vibration. In this way, the control safety of the valve is improved and it is adapted to harsh working conditions. The anti-rotation component is set to prevent the valve stem from rotating during operation, thereby ensuring the reliability of the structure.

[0007] It is further configured as follows: the control mechanism includes a toggle assembly and a linkage assembly that constitutes a linkage between the toggle assembly and the locking assembly, the toggle assembly has a first locking state and a second locking state, when the toggle assembly is in the first locking state, the valve stem is in a locked state; when the toggle assembly is in the second locking state, the valve stem is in an active free state.

[0008] By adopting the above technical solution, the toggle assembly has two locking states, and the coordinated linkage assembly is used to form a linkage with the locking assembly, making the control mechanism more convenient to operate.

[0009] It is further configured as follows: it includes a locking seat fixedly arranged on the valve stem, the first matching feature is a fixed lock tooth bar fixedly arranged on the valve cover and extending along the axis of the valve stem, and the second matching feature is a movable lock tooth movably arranged on the locking seat, and the movable lock tooth reciprocates toward the fixed lock tooth bar and moves with the valve stem.

[0010] By adopting the above technical solution, the movable locking tooth and the locking seat move along the axis of the valve stem with the valve stem. When the valve stem is adjusted to the required position, the movable locking tooth is driven to move toward the fixed locking tooth bar, and the valve is locked by the engagement of the two.

[0011] It is further configured that the toggle assembly includes a toggle block slidably arranged on the locking seat, a locking claw rotatably arranged on the toggle block and moving with the toggle block, a torsion spring arranged on the locking seat corresponding to the movement path of the locking claw and for the locking claw to be embedded in the first locking groove and the second locking groove, and driving the locking claw to rotate toward one side of the first locking groove and the second locking groove.

[0012] By adopting the above technical solution, the shifting block is shifted so that the locking claw moving with the shifting block can be embedded in the first locking groove or the second locking groove, thereby achieving the purpose of controlling the locking.

[0013] It is further configured as follows: the linkage assembly includes a return spring that drives the movable lock tooth to move away from the fixed lock rack, a first linkage protrusion formed at one end of the movable lock tooth facing away from the fixed lock rack, and a second linkage protrusion formed on the shift block and corresponding to one side of the first linkage protrusion; when the second linkage protrusion abuts against the first linkage protrusion, the movable lock tooth engages with the fixed lock rack.

[0014] By adopting the above technical solution, when the first linkage protrusion and the second linkage protrusion do not abut against each other, the movable lock tooth is separated from the fixed lock tooth bar and the locking claw is embedded in the first lock groove or the second lock groove; when the first linkage protrusion abuts against the second linkage protrusion, the movable lock tooth is engaged with the fixed lock tooth bar and the locking claw is embedded in the first lock groove or the second lock groove, thereby achieving the purpose of linkage control.

[0015] It is further configured as follows: a stroke indicating plate is provided on one side of the fixed lock rack, and a stroke pointer cooperating with the stroke indicating plate is fixedly provided on the locking seat.

[0016] By adopting the above technical solution, this setting allows the staff to directly observe the position of the stroke pointer on the stroke indicator plate when performing the locking operation, which is convenient for real-time recording of the valve status and makes daily maintenance and recording operations more convenient without adding unnecessary actions caused by recording.

[0017] It is further configured that: the anti-rotation component includes an anti-rotation protrusion fixedly arranged on the outer peripheral wall of the valve stem and an anti-rotation travel groove arranged on the valve body and for the anti-rotation protrusion to be embedded.

[0018] By adopting the above technical solution, the anti-rotation protrusion moves with the valve stem in the anti-rotation stroke groove, thereby achieving the purpose of preventing the valve stem from rotating.

[0019] In summary, the utility model has the following beneficial effects: the utility model can avoid misoperation, thereby improving the control safety of the valve and adapting to harsh working conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of an embodiment;

[0021] Figure 2 for Figure 1 Enlarged view of part A in the middle;

[0022] Figure 3 for Figure 1 Enlarged view of part B in the middle.

[0023] In the figure: 1. valve body; 2. valve cover; 3. valve stem; 4. valve disc; 5. hand wheel; 6. anti-rotation assembly; 61. anti-rotation protrusion; 62. anti-rotation travel groove; 7. locking assembly; 71. fixed lock rack; 72. movable lock tooth; 8. control mechanism; 83. shift block; 84. locking claw; 85. first lock groove; 86. second lock groove; 87. return spring; 88. first linkage protrusion; 89. second linkage protrusion; 9. locking seat; 10. travel indicator plate; 11. travel pointer. DETAILED DESCRIPTION

[0024] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0025] refer to Figures 1 to 3 A stop valve comprises: a valve body 1, which is configured to allow a medium to pass through; a valve cover 2, which is a fixed cover arranged at the mounting port of the valve body 1; a valve stem 3, which is installed on the valve cover 2 and one end of which extends into the valve body 1; a valve flap 4, which is arranged in the valve body 1 and connected to the valve stem 3; a hand wheel 5, which is rotatably arranged on the valve cover 2 and threadedly connected to the valve stem 3 to drive the valve stem 3 to reciprocate along the axis; an anti-rotation component 6, which is configured to limit the circumferential rotation of the valve stem 3 during movement; a locking component 7, which is configured to have a first matching feature and a second matching feature, the first matching feature is arranged on the valve cover 2, the second matching feature is arranged on the valve stem 3 and moves with the valve stem 3, and the first matching feature cooperates with the second matching feature to limit the movement of the valve stem 3; a control mechanism 8, which is configured to control whether the first matching feature and the second matching feature form a match.

[0026] The control mechanism 8 includes a toggle assembly and a linkage assembly constituting a linkage between the toggle assembly and the locking assembly 7. The toggle assembly has a first locking state and a second locking state. When the toggle assembly is in the first locking state, the valve stem 3 is in a locked state; when the toggle assembly is in the second locking state, the valve stem 3 is in a movable free state. The control mechanism 8 includes a locking seat 9 fixedly arranged on the valve stem 3, and the control mechanism 8 is arranged in the locking seat 9. The first matching feature is a fixed lock tooth bar 71 fixedly arranged on the valve cover 2 and extending along the axis of the valve stem 3. The second matching feature is a movable lock tooth 72 slidably arranged on the locking seat 9. The movable lock tooth 72 reciprocates horizontally toward the fixed lock tooth bar 71 and moves with the valve stem 3.

[0027] The toggle assembly includes a toggle block 83 vertically slidably disposed on the locking seat 9, a locking claw 84 disposed on the toggle block 83 by rotating through a rotating shaft, and a torsion spring provided on the locking seat 9 corresponding to the movement path of the locking claw 84 and allowing the locking claw 84 to be inserted into the first locking groove 85 and the second locking groove 86 and driving the locking claw 84 to rotate toward one side of the first locking groove 85 and the second locking groove 86. The torsion spring is sleeved on the rotating shaft and one end is fixedly connected to the locking claw 84 and the other end is fixedly connected to the locking seat 9.

[0028] The linkage assembly includes a return spring 87 that drives the movable lock tooth 72 to move away from the fixed lock rack 71, a first linkage protrusion 88 integrally formed at one end of the movable lock tooth 72 facing away from the fixed lock rack 71, and a second linkage protrusion 89 integrally formed at the shift block 83 and corresponding to one side of the first linkage protrusion 88. When the second linkage protrusion 89 abuts against the first linkage protrusion 88, the movable lock tooth 72 is meshed with the fixed lock rack 71. One end of the return spring 87 is fixedly connected to the movable lock tooth 72, and the other end is fixedly connected to the locking seat 9.

[0029] A travel indicator plate 10 is fixedly arranged on one side of the fixed lock rack 71, and a travel pointer 11 matching the travel indicator plate 10 is fixedly arranged on the outer wall of the lock seat 9. The anti-rotation assembly 6 includes an anti-rotation protrusion 61 integrally arranged on the outer peripheral wall of the valve stem 3 and an anti-rotation travel groove 62 opened on the valve body 1 and for the anti-rotation protrusion 61 to be embedded. The length direction of the anti-rotation travel groove 62 is parallel to the axis of the valve stem 3.

[0030] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed, but such modifications are protected by patent law as long as they are within the scope of the claims of the present invention.

Claims

1. A stop valve, characterized in that: include: A valve body (1) is configured to allow a medium to pass through; a valve cover (2) is configured to cover a mounting opening of the valve body (1); a valve stem (3) is mounted on the valve cover (2) and one end of which extends into the valve body (1); a valve flap (4) is disposed in the valve body (1) and connected to the valve stem (3); a hand wheel (5) is rotatably disposed on the valve cover (2) and connected to the valve stem (3) to drive the valve stem (3) to reciprocate along an axis; an anti-rotation assembly (6) is configured to limit the circumferential rotation of the valve stem (3) during movement; a locking assembly (7) is configured to have a first matching feature and a second matching feature, wherein the first matching feature is disposed on the valve cover (2) and the second matching feature is disposed on the valve stem (3) and moves with the valve stem (3), and the first matching feature matches the second matching feature to limit the movement of the valve stem (3); and a control mechanism (8) is configured to control whether the first matching feature and the second matching feature form a match.

2. The stop valve according to claim 1, characterized in that: The control mechanism (8) comprises a toggle assembly and a linkage assembly constituting a linkage between the toggle assembly and the locking assembly (7), wherein the toggle assembly has a first locking state and a second locking state. When the toggle assembly is in the first locking state, the valve stem (3) is in a locked state; when the toggle assembly is in the second locking state, the valve stem (3) is in a free state of movement.

3. The stop valve according to claim 2, characterized in that: It comprises a locking seat (9) fixedly arranged on the valve stem (3), the first matching feature is a fixed locking tooth bar (71) fixedly arranged on the valve cover (2) and extending along the axis of the valve stem (3), and the second matching feature is a movable locking tooth (72) movably arranged on the locking seat (9), and the movable locking tooth (72) reciprocates toward the fixed locking tooth bar (71) and moves with the valve stem (3).

4. The stop valve according to claim 2, characterized in that: The shifting assembly comprises a shifting block (83) slidably arranged on the locking seat (9), a locking claw (84) rotatably arranged on the shifting block (83) and moving with the shifting block (83), a torsion spring arranged on the locking seat (9) corresponding to the movement path of the locking claw (84) and allowing the locking claw (84) to be inserted into the first locking groove (85) and the second locking groove (86), and driving the locking claw (84) to rotate toward one side of the first locking groove (85) and the second locking groove (86).

5. The stop valve according to claim 4, characterized in that: The linkage assembly comprises a return spring (87) for driving the movable lock tooth (72) to move away from the fixed lock tooth bar (71), a first linkage protrusion (88) formed at one end of the movable lock tooth (72) facing away from the fixed lock tooth bar (71), and a second linkage protrusion (89) formed on the shift block (83) and corresponding to one side of the first linkage protrusion (88); when the second linkage protrusion (89) abuts against the first linkage protrusion (88), the movable lock tooth (72) meshes with the fixed lock tooth bar (71).

6. The stop valve according to claim 3, characterized in that: A travel indicator plate (10) is provided on one side of the fixed lock rack (71), and a travel pointer (11) matching the travel indicator plate (10) is fixedly provided on the locking seat (9).

7. The stop valve according to claim 1, characterized in that: The anti-rotation assembly (6) comprises an anti-rotation protrusion (61) fixedly arranged on the outer peripheral wall of the valve stem (3) and an anti-rotation travel groove (62) arranged on the valve body (1) and for the anti-rotation protrusion (61) to be embedded.

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