Self-locking stop valve

Abstract

The utility model discloses a self-locking stop valve which comprises a valve body, a valve cover, a valve cavity, a valve rod, a flow channel, a valve clack, a hand wheel, a side opening channel, a self-locking assembly, a self-locking seat, a self-locking execution block, a self-locking receiving groove, a control piece and a locking piece. The self-locking check valve has the following advantages and effects that when the valve rod moves downwards to enable the valve clack to cut off the flow channel, the height of the self-locking receiving groove is consistent with that of the self-locking execution block, the self-locking execution block and the self-locking receiving groove correspond in position, the self-locking execution block can be jacked into the self-locking receiving groove to achieve the purpose of locking the valve rod, the valve rod is prevented from deviating under external impact, and the service life of the self-locking check valve is prolonged. The runner leakage is caused; meanwhile, the locking piece can lock the position of the self-locking execution block after the self-locking execution block is hidden in the self-locking seat, so that the self-locking execution block can be prevented from making contact with the valve rod to generate frictional resistance, the valve rod can smoothly move, rotation of the hand wheel cannot be hindered, the hand wheel can be normally operated with one hand, and compared with the prior art, the self-locking valve is more convenient and more labor-saving.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to a self-locking stop valve. Background Art

[0002] In existing valve technology, globe valves are widely used in fluid control systems to regulate flow or completely shut off fluid flow. However, in environments with high pressure, high flow rates, or vibration, traditional globe valves can cause the valve stem to shift, preventing the disc from fully sealing when closed, affecting the valve's reliability and safety.

[0003] Chinese patent application number CN201922432180.1 discloses a valve stem self-locking device for a stop valve, including a stop valve, wherein the outer side wall of the stop valve is symmetrically fixedly connected with a side block, the top side wall of the side block is fixedly connected with a spring, the top side wall of the spring is equipped with a support rod, the top side wall of the support rod is fixedly connected with a concave block, and the inner side wall of the concave block is in contact with the stop valve.

[0004] The working principle of the above patent is to first pull the concave block downward, compress it between the side block and the support rod through the spring, shorten the gap between the support rod and the side block, loosen the concave block and reset it through the spring, and snap the concave block and the stop valve together, which can limit the stop valve and provide additional fixation to make the overall fixing effect better, avoid the stop valve from rotating again after use, and prevent it from affecting the operation of the stop valve.

[0005] However, in actual operation, in order to smoothly rotate the stop valve, it is necessary to pull the recessed block downwards all the time to prevent the recessed block from obstructing the operation of the stop valve; the actual experience is not good, it cannot be operated with one hand, and there is a defect of laborious operation. Utility Model Content

[0006] The purpose of the utility model is to provide a self-locking stop valve to solve the problems raised in the background technology.

[0007] The above technical objectives of the present invention are achieved through the following technical solutions:

[0008] A self-locking stop valve comprises a valve body, a valve cover is provided at the upper end of the valve body, a vertical valve cavity is defined in the valve cover, a vertically movable valve stem is provided in the valve cavity, a flow channel is defined in the valve body, a valve disc is fixedly provided at the lower end of the valve stem to control the flow channel to be connected or cut off, and a hand wheel is provided at the upper end of the valve cover to be linked to the valve stem;

[0009] A side opening is provided on the left side of the valve cover, and a self-locking assembly is provided in the side opening. The self-locking assembly includes a self-locking seat fixed to the valve cover, and a self-locking actuator block capable of moving horizontally is provided in the self-locking seat. A self-locking receiving groove is provided on the side of the valve stem. When the valve stem moves downward so that the valve disc cuts off the flow channel, the height of the self-locking receiving groove is consistent with the height of the self-locking actuator block and the positions of the two correspond. The self-locking actuator block can be pushed into the self-locking receiving groove to lock the valve stem.

[0010] The self-locking assembly also includes a control component for controlling the self-locking execution block to be hidden in the self-locking seat, and a locking component for locking the position of the self-locking execution block after the self-locking execution block is hidden in the self-locking seat; after the position of the self-locking execution block is locked by the locking component, it can prevent the self-locking execution block from contacting the valve stem and generating friction resistance.

[0011] The further configuration is as follows: a built-in hole communicating with the left and right sides is opened inside the self-locking seat; the control member includes a built-in movable shaft movably arranged in the built-in hole, the built-in movable shaft contacts the inner wall of the lower end of the built-in hole, and the self-locking execution block is fixed to the right end of the built-in movable shaft; a side bearing plate fixed to the self-locking seat is provided on the left side of the built-in hole, the upper end of the side bearing plate contacts the inner wall of the upper end of the built-in hole, and a gap is formed between the lower end and the inner wall of the lower end of the built-in hole to form a through-hole, the built-in movable shaft will penetrate into the through-hole, the built-in movable shaft is adapted to the through-hole and contacts the inner peripheral wall of the through-hole to ensure that it can perform stable horizontal movement;

[0012] A power spring is provided between the side bearing plate and the self-locking execution block to provide kinetic energy for the self-locking execution block to move rightward.

[0013] A further configuration is that the control member also includes a first grip shaft fixed to the left end of the built-in movable shaft, the first grip shaft is always located outside the self-locking seat, and the first grip shaft is for the operator to hold to control the self-locking execution block to move left, so that it is hidden in the self-locking seat; the cross-sectional width of the right end of the first grip shaft is greater than the through hole.

[0014] A further configuration is that the locking member includes a built-in locking shaft fixed to the left end of the self-locking execution block, the built-in locking shaft contacts the upper inner wall of the built-in hole, a spacing area is formed between the built-in locking shaft and the built-in movable shaft, and the power spring is limited within the spacing area.

[0015] The further configuration is as follows: the locking member further comprises a locking hole provided inside the self-locking seat, the locking hole being vertically arranged, the upper end of the locking hole being in communication with the exterior of the self-locking seat, and the lower end being in communication with the built-in hole; a counterweight shaft is passed through the locking hole, the counterweight shaft matches the locking hole, and the counterweight shaft has a downward movement tendency due to its own gravity; a second grip shaft is fixedly provided on the upper end of the counterweight shaft; the cross-sectional width of the lower end of the second grip shaft is greater than the locking hole; the second grip shaft is for an operator to grip to control the upward movement of the counterweight shaft;

[0016] The upper end of the built-in locking shaft is provided with a recessed groove. When the built-in locking shaft contacts the side bearing plate, the recessed groove will be aligned with the locking hole.

[0017] A further configuration is that the right side of the lower end of the counterweight shaft has an inclined plane.

[0018] The beneficial effects of the present invention are:

[0019] 1. In the present invention, when the valve stem moves downward so that the valve disc cuts off the flow channel, the height of the self-locking receiving groove is consistent with the height of the self-locking actuator block and the positions of the two correspond. The self-locking actuator block can be pushed into the self-locking receiving groove to lock the valve stem, thereby preventing the valve stem from deflecting under external impact, causing flow channel leakage; at the same time, the locking member can lock the position of the self-locking actuator block after the self-locking actuator block is hidden in the self-locking seat, which not only avoids the friction resistance generated by contact between the self-locking actuator block and the valve stem, allowing the valve stem to move smoothly, but also will not hinder the rotation of the handwheel, and can operate the handwheel normally with one hand, which is more convenient and labor-saving than the existing technology.

[0020] 2. In the present invention, the built-in movable shaft is adapted to the through-hole and contacts the inner wall of the through-hole to ensure that it can perform stable horizontal movement; the side bearing plate not only provides a support point for the power spring, but also has a detachable function. When the power spring fails, the side bearing plate can be removed to replace the power spring.

[0021] 3. In the present invention, the first grip shaft can not only be held by the operator to control the self-locking execution block to move leftward so as to be hidden in the self-locking seat, but can also contact the self-locking seat to limit the position.

[0022] 4. In the present invention, the spacing area is provided for placing the power spring to limit the power spring.

[0023] 5. In the present invention, the locking hole is used to limit the counterweight shaft, and the second grip shaft is for the operator to hold to control the upward movement of the counterweight shaft; when the built-in locking shaft contacts the side bearing plate, the recessed groove will be aligned with the locking hole, and the counterweight shaft will extend downward into the recessed groove based on its own gravity, thereby achieving the purpose of locking the built-in locking shaft.

[0024] 6. In the present invention, the inclined plane can improve the smoothness of the cooperation, so that when the operator holds the first grip shaft to pull, the built-in locking shaft can push the counterweight shaft to move stably to the left. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural diagram of an embodiment;

[0026] Figure 2 for Figure 1 Enlarged view of part A in the middle.

[0027] In the figure: 11, valve body; 12, valve cover; 13, valve chamber; 14, valve stem; 141, self-locking receiving groove; 15, flow channel; 16, valve disc; 17, handwheel; 21, side opening; 22, self-locking seat; 221, built-in hole; 23, self-locking actuator block; 24, built-in movable shaft; 31, side bearing plate; 41, through hole; 51, power spring; 61, first grip shaft; 71, built-in locking shaft; 711, recessed groove; 72, spacing area; 81, locking hole; 82, counterweight shaft; 821, inclined plane; 83, second grip shaft. DETAILED DESCRIPTION

[0028] The present invention will be described in further detail below with reference to the accompanying drawings.

[0029] As attached Figure 1 and 2 As shown;

[0030] This embodiment discloses a self-locking stop valve, comprising a valve body 11, a valve cover 12 disposed at the upper end of the valve body 11, a vertical valve chamber 13 defined within the valve cover 12, a vertically movable valve stem 14 disposed within the valve chamber 13, a flow channel 15 defined within the valve body 11, a valve flap 16 fixedly disposed at the lower end of the valve stem 14 for controlling the flow channel 15 to be connected or blocked, and a handwheel 17 interlocked with the valve stem 14 disposed at the upper end of the valve cover 12. The above is a conventional structure of a stop valve, pertaining to the prior art, and will not be further elaborated upon herein.

[0031] A side opening 21 is provided on the left side of the valve cover 12, and a self-locking assembly is provided in the side opening 21. The self-locking assembly includes a self-locking seat 22 fixed to the valve cover 12, and a self-locking actuator 23 that can move horizontally is provided in the self-locking seat 22. A self-locking receiving groove 141 is provided on the side of the valve stem 14. When the valve stem 14 moves downward so that the valve disc 16 cuts off the flow channel 15, the height of the self-locking receiving groove 141 is consistent with the height of the self-locking actuator 23 and the positions of the two correspond. The self-locking actuator 23 can be pushed into the self-locking receiving groove 141 to achieve the purpose of locking the valve stem 14;

[0032] The self-locking assembly also includes a control component that controls the self-locking execution block 23 to be hidden in the self-locking seat 22, and a locking component that locks the position of the self-locking execution block 23 after the self-locking execution block 23 is hidden in the self-locking seat 22; after the position of the self-locking execution block 23 is locked by the locking component, it can prevent the self-locking execution block 23 from contacting the valve stem 14 and generating friction resistance.

[0033] Among them, the self-locking seat 22 is provided with a built-in hole 221 connected to the left and right sides; the control member includes a built-in movable shaft 24 movably arranged in the built-in hole 221, the built-in movable shaft 24 contacts the inner wall of the lower end of the built-in hole 221, and the self-locking execution block 23 is fixed to the right end of the built-in movable shaft 24; a side bearing plate 31 fixed to the self-locking seat 22 is provided on the left side of the built-in hole 221, the upper end of the side bearing plate 31 contacts the inner wall of the upper end of the built-in hole 221, and a gap is formed between the lower end and the inner wall of the lower end of the built-in hole 221 to form a through hole 41, and the built-in movable shaft 24 will penetrate into the through hole 41, and the built-in movable shaft 24 adapts to the through hole 41 and contacts the inner circumferential wall of the through hole 41 to ensure that it can perform stable horizontal movement;

[0034] A power spring 51 is provided between the side bearing plate 31 and the self-locking execution block 23 to provide kinetic energy for the self-locking execution block 23 to move rightward.

[0035] Among them, the control part also includes a first grip shaft 61 fixed to the left end of the built-in movable shaft 24. The first grip shaft 61 is always located outside the self-locking seat 22. The first grip shaft 61 is for the operator to hold to control the self-locking execution block 23 to move left, so that it is hidden in the self-locking seat 22; the cross-sectional width of the right end of the first grip shaft 61 is greater than the through hole 41.

[0036] Among them, the locking part includes a built-in locking shaft 71 fixed at the left end of the self-locking execution block 23, the built-in locking shaft 71 contacts the upper inner wall of the built-in hole 221, and a spacing area 72 is formed between the built-in locking shaft 71 and the built-in movable shaft 24, and the power spring 51 is limited in the spacing area 72.

[0037] Among them, the locking member also includes a locking hole 81 opened inside the self-locking seat 22, the locking hole 81 is vertically arranged, the upper end of the locking hole 81 is communicated with the outside of the self-locking seat 22, and the lower end is communicated with the built-in hole 221; a counterweight shaft 82 is passed through the locking hole 81, and the counterweight shaft 82 matches the locking hole 81. The counterweight shaft 82 has a downward movement tendency due to its own gravity; a second grip shaft 83 is fixedly provided on the upper end of the counterweight shaft 82; the cross-sectional width of the lower end of the second grip shaft 83 is larger than the locking hole 81; the second grip shaft 83 is for the operator to hold to control the upward movement of the counterweight shaft 82;

[0038] A recessed groove 711 is formed at the upper end of the built-in locking shaft 71 . When the built-in locking shaft 71 contacts the side bearing plate 31 , the recessed groove 711 is aligned with the locking hole 81 .

[0039] Therein, the right side of the lower end of the counterweight shaft 82 has an inclined plane 821 .

[0040] The working process of this embodiment is:

[0041] 1. When the valve stem 14 moves downward so that the valve disc 16 cuts off the flow channel 15, the height of the self-locking receiving groove 141 is consistent with the height of the self-locking actuator 23 and the positions of the two correspond. The self-locking actuator 23 will move to the right under the kinetic energy provided by the power spring 51, and then push into the self-locking receiving groove 141 to lock the valve stem 14; prevent the valve stem 14 from deflecting under external impact, causing leakage in the flow channel 15.

[0042] 2. To control the flow passage 15, the operator grasps the first grip 61 and pulls it leftward. The built-in movable shaft 24 moves leftward until the built-in locking shaft 71 contacts the side bearing plate 31 and stops moving leftward. At this time, the self-locking actuator 23 is hidden in the self-locking seat 22 and does not contact the valve stem 14 to generate frictional resistance. At the same time, the recessed groove 711 aligns with the locking hole 81, and the counterweight shaft 82 extends downward into the recessed groove 711 under its own gravity, locking the built-in locking shaft 71. The operator can freely control the handwheel 17 without any obstacles.

[0043] 3. When the valve stem 14 moves downward so that the valve disc 16 blocks the flow channel 15, the operator only needs to hold the second grip shaft 83 and pull it upward. The counterweight shaft 82 will move upward accordingly and leave the recessed groove 711. Then, the self-locking actuator 23 will move right under the kinetic energy provided by the power spring 51 and then push into the self-locking receiving groove 141 to lock the valve stem 14.

[0044] 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. However, as long as they are within the scope of the claims of the present invention, they are protected by patent law.

Claims

1. A self-locking stop valve, comprising a valve body (11), a valve cover (12) provided at the upper end of the valve body (11), a vertical valve chamber (13) defined in the valve cover (12), a vertically movable valve stem (14) provided in the valve chamber (13), a flow channel (15) defined in the valve body (11), a valve flap (16) fixedly provided at the lower end of the valve stem (14) for controlling the flow channel (15) to be connected or cut off, and a hand wheel (17) linked to the valve stem (14) provided at the upper end of the valve cover (12); characterized in that: A side opening (21) is provided on the left side of the valve cover (12), and a self-locking component is provided in the side opening (21). The self-locking component includes a self-locking seat (22) fixed on the valve cover (12), and a self-locking execution block (23) capable of moving horizontally is provided in the self-locking seat (22). A self-locking receiving groove (141) is provided on the side of the valve stem (14). When the valve stem (14) moves downward so that the valve disc (16) cuts off the flow channel (15), the height of the self-locking receiving groove (141) is consistent with the height of the self-locking execution block (23) and the positions of the two correspond. The self-locking execution block (23) can be pushed into the self-locking receiving groove (141) to achieve the purpose of locking the valve stem (14); The self-locking assembly further comprises a control member for controlling the self-locking execution block (23) to be hidden in the self-locking seat (22), and a locking member for locking the position of the self-locking execution block (23) after the self-locking execution block (23) is hidden in the self-locking seat (22); after the position of the self-locking execution block (23) is locked by the locking member, the self-locking execution block (23) can be prevented from contacting the valve stem (14) and generating friction resistance.

2. A self-locking stop valve according to claim 1, characterized in that: The self-locking seat (22) is provided with a built-in hole (221) connected to the left and right sides; the control member includes a built-in movable shaft (24) movably arranged in the built-in hole (221), the built-in movable shaft (24) contacts the inner wall of the lower end of the built-in hole (221), and the self-locking execution block (23) is fixed to the right end of the built-in movable shaft (24); a side bearing plate (31) fixed to the self-locking seat (22) is provided on the left side of the built-in hole (221), the upper end of the side bearing plate (31) contacts the inner wall of the upper end of the built-in hole (221), and a gap is formed between the lower end and the inner wall of the lower end of the built-in hole (221) to form a through hole (41), the built-in movable shaft (24) will penetrate into the through hole (41), the built-in movable shaft (24) is adapted to the through hole (41) and contacts the inner peripheral wall of the through hole (41) to ensure that it can perform stable horizontal movement; A power spring (51) is provided between the side bearing plate (31) and the self-locking execution block (23) to provide kinetic energy for the self-locking execution block (23) to move rightward.

3. A self-locking stop valve according to claim 2, characterized in that: The control member further comprises a first grip shaft (61) fixed to the left end of the built-in movable shaft (24), the first grip shaft (61) is always located outside the self-locking seat (22), and the first grip shaft (61) is held by an operator to control the self-locking execution block (23) to move leftward so that it is hidden in the self-locking seat (22); the cross-sectional width of the right end of the first grip shaft (61) is greater than the through hole (41).

4. A self-locking stop valve according to claim 2, characterized in that: The locking member includes a built-in locking shaft (71) fixed to the left end of the self-locking execution block (23), the built-in locking shaft (71) contacts the inner wall of the upper end of the built-in hole (221), and a spacing area (72) is formed between the built-in locking shaft (71) and the built-in movable shaft (24), and the power spring (51) is limited in the spacing area (72).

5. A self-locking stop valve according to claim 4, characterized in that: The locking member further comprises a locking hole (81) provided inside the self-locking seat (22), the locking hole (81) being arranged vertically, the upper end of the locking hole (81) being communicated with the outside of the self-locking seat (22), and the lower end being communicated with the built-in hole (221); a counterweight shaft (82) is passed through the locking hole (81), the counterweight shaft (82) matches the locking hole (81), and the counterweight shaft (82) has a downward movement tendency due to its own gravity; a second grip shaft (83) is fixedly provided at the upper end of the counterweight shaft (82); the cross-sectional width of the lower end of the second grip shaft (83) is larger than the locking hole (81); the second grip shaft (83) is for an operator to hold to control the upward movement of the counterweight shaft (82); The upper end of the built-in locking shaft (71) is provided with a recessed groove (711). When the built-in locking shaft (71) contacts the side bearing plate (31), the recessed groove (711) is aligned with the locking hole (81).

6. A self-locking stop valve according to claim 5, characterized in that: The right side of the lower end of the counterweight shaft (82) is provided with an inclined plane (821).

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