Ball valve with mistaken starting prevention function

Abstract

The utility model relates to a ball valve with a false start prevention function, which comprises a valve body, a valve rod rotatably mounted on the valve body, and a valve ball positioned in the valve body and fixedly connected with the valve body, a flow channel is arranged on the valve ball, and the valve body comprises a liquid inlet channel and a liquid outlet channel which are positioned on the left side and the right side of the flow channel. The valve further comprises a locking sleeve and a matching piece for inserting the valve rod, the locking sleeve is located at the top of the valve body and located in the circumferential direction of the valve rod, a plurality of locking pieces are connected into the locking sleeve in a sliding mode, the valve rod is provided with through grooves corresponding to the locking pieces, and the matching piece is inserted into the valve rod and comprises a matching ring used for pushing away the locking pieces. And the matching piece is detachably connected with the valve rod. By the adoption of the scheme, the ball valve with the mistaken opening prevention function is provided, and the matching piece can be moved downwards to eject the locking pieces outwards so as to be fixed to the valve rod to achieve rotation of the valve rod.

Description

Technical Field

[0001] This utility model relates to the field of ball valves, and in particular to a ball valve with anti-accidental opening function. Background Technology

[0002] A ball valve is a type of valve whose main components include a valve body, a ball valve core, a valve seat, a valve stem fixed to the ball valve core and rotatably mounted on the valve body, and a switching element located on the valve stem. The ball valve core has a hole in the middle, and by rotating the switching element, the hole on the ball valve core can be connected to or separated from the inlet and outlet channels at both ends of the valve body, thereby enabling the fluid on both sides of the ball valve to be connected or blocked through the ball valve.

[0003] In some critical applications, such as petrochemicals and natural gas transportation, if a ball valve is accidentally opened or closed, it may lead to serious safety accidents. Furthermore, for some complex systems, such as fluid control systems in industrial production processes, any unplanned operation may affect the stable operation of the entire system.

[0004] Therefore, how to prevent accidental opening of ball valves has become a problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0005] To address the shortcomings of existing technologies, the purpose of this utility model is to provide a ball valve with an anti-misoperation function that allows the valve stem to rotate by moving the mating parts downwards and then pushing the locking parts outwards to fix them to the valve stem.

[0006] To achieve the above objectives, this utility model provides the following technical solution: It includes a valve body, a valve stem rotatably mounted on the valve body, a valve ball located inside the valve body and fixedly connected to the valve body, a flow channel provided on the valve ball, an inlet channel and an outlet channel located on the left and right sides of the flow channel, and a locking sleeve and a mating component for inserting the valve stem. The locking sleeve is located at the top of the valve body and circumferentially on the valve stem. A plurality of locking elements are slidably connected inside the locking sleeve. The valve stem has a through groove corresponding to each locking element. The mating component inserts the valve stem and includes a mating ring for radially pushing outwards to open each locking element. The mating component and the valve stem are detachably connected.

[0007] The present invention is further configured to include: guide rods of the same number as the locking components and slidably mounted on the locking sleeve, and corresponding matching springs fitted onto the guide rods. Each guide rod includes a mounting ring. One end of each matching spring is fixedly connected to the locking component and the other end is fixed to the corresponding mounting ring. The locking sleeve is provided with a matching groove corresponding to each matching spring. The diameter of each mounting ring is larger than the diameter of the corresponding guide rod. Each locking sleeve is provided with a limiting hole of the same diameter as the mounting ring on the outside of each matching groove.

[0008] The present invention is further configured such that: the valve stem is provided with a mounting groove corresponding to the mating part, and the bottom diameter of the mating part is smaller than the diameter of the mounting groove.

[0009] The present invention is further configured such that each of the locking components is a trapezoidal shape with a narrow top and a wide bottom, and each includes an inner guide surface, and each guide surface is inclined from top to bottom and from the outside to the inside.

[0010] The present invention is further configured such that the mating ring is narrowed from top to bottom and the outer wall of the mating ring fits against each guide surface.

[0011] The present invention is further configured such that: the mating component also includes a top limiting cover, the limiting cover being sleeved on the valve stem and detachably connected to the valve stem.

[0012] The present invention is further configured such that: the limiting cover made of a material that is prone to deformation is integrally formed with a plurality of connecting blocks made of a material that is prone to deformation, the valve stem is provided with a connecting slot corresponding to each connecting block, each connecting block is recessed inward with a ring-shaped limiting slot, and the valve stem is provided with a limiting block in each limiting slot.

[0013] By adopting the above technical solution, since several locking elements are slidably connected inside the locking sleeve, when the mating part is not installed inside the valve stem, each locking element will be located in the corresponding passage groove of the valve stem. Due to the restriction of each locking element, the valve stem cannot rotate freely and therefore cannot drive the valve ball to rotate. Therefore, after removing the mating part from the valve stem, no force can be applied to change the state of the valve ball. When it is necessary to rotate the valve stem, the mating part is installed inside the valve stem. As the mating part moves downward, when the mating ring of the mating part contacts each locking element located in the passage groove of the valve stem, it will push the locking elements outward and separate each locking element from the corresponding passage groove. At this time, the connection between the mating part and the valve stem is completed, and the valve stem can be rotated to realize the rotation of the valve ball in the valve body. In summary, each locking element slidably installed inside the locking sleeve can keep the ball valve in the working or cut-off state and prevent it from being accidentally opened or closed, thereby enabling the ball valve to operate stably. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a perspective view of a specific embodiment of the present utility model;

[0016] Figure 2 This is a cross-sectional view of the present invention;

[0017] Figure 3 This is an exploded view of the present invention;

[0018] Figure 4 This is a cross-sectional view of the present invention under explosive conditions;

[0019] Figure 5 for Figure 4 Enlarged view of A in the middle;

[0020] Figure 6 for Figure 4 Enlarged view of B in the middle;

[0021] Figure 7 for Figure 4 A magnified view of C.

[0022] In the diagram: 1 - Valve body;

[0023] 2-Valve stem, 21-Pass groove, 22-Mounting groove, 23-Connecting slot, 24-Limiting block;

[0024] 3-Valve ball, 31-Flow passage;

[0025] 4-Inlet channel;

[0026] 5-Liquid outlet channel;

[0027] 6-Locking sleeve, 61-Locking element, 611-Guide surface; 62-Matching groove, 63-Limiting hole;

[0028] 7-Matching part, 71-Matching ring;

[0029] 8-Guide rod, 81-Mounting ring;

[0030] 9-Matching spring;

[0031] 10-Limit cover, 101-Connecting plug, 1011-Limit slot. Detailed Implementation

[0032] 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.

[0033] like Figures 1-7As shown, this utility model discloses a ball valve with anti-accidental opening function, including a valve body 1, a valve stem 2 rotatably mounted on the valve body 1, and a valve ball 3 located inside the valve body 1 and fixedly connected to the valve body 1. Valve seats (not shown in the figure) are provided at both ends of the valve ball 3 on the valve body 1. A flow channel 31 is provided on the valve ball 3. The valve body 1 includes an inlet channel 4 and an outlet channel 5 located on the left and right sides of the flow channel 31. Rotating the switch can drive the valve ball 3 to rotate. In the open state, one end of the flow channel 31 on the valve ball 3 is connected to the inlet channel 4 and the other end is connected to the outlet channel 5, thereby allowing the valve body 1 to rotate. The flow of liquid on both sides is allowed. When it is necessary to cut off the flow of liquid on both sides, rotating the switch can drive the valve stem 2, which is fixed to the valve ball 3, to rotate, thereby causing the flow channel 31 to be misaligned with the inlet channel 4 and the outlet channel 5. At this time, the liquid at both ends of the valve body 1 cannot be connected (this is prior art and will not be described in detail here). It also includes a locking sleeve 6 and a mating part 7 for inserting the valve stem 2. The locking sleeve 6 is located at the top of the valve body 1 and around the valve stem 2. Several locking parts 61 are slidably connected inside the locking sleeve 6. The valve stem 2 is provided with a through groove 21 corresponding to each locking part 61. The mating part 7 is inserted into the valve stem 2 and includes The mating ring 71 is used to radially push outwards to open each locking element 61. The mating element 7 is detachably connected to the valve stem 2 by means of fastening or other methods. Since several locking elements 61 are slidably connected inside the locking sleeve 6, when the mating element 7 is not installed in the valve stem 2, each locking element 61 will be located in the corresponding through groove 21 of the valve stem 2. Due to the restriction of each locking element 61, the valve stem 2 cannot rotate freely and therefore cannot drive the valve ball 3 to rotate. Therefore, after removing the mating element 7 from the valve stem 2, it is impossible to apply force to change the state of the valve ball 3. When it is necessary to rotate the valve stem 2, the mating element 7 is installed in the valve stem 2. As the mating element 7 moves downwards... When the mating ring 71 of the mating part 7 contacts each locking element 61 located in the passage groove 21 of the valve stem 2, it will push each locking element 61 outward, thereby separating each locking element 61 from the corresponding passage groove 21. At this time, the connection between the mating part 7 and the valve stem 2 is completed, and the valve stem 2 can be rotated to realize the rotation of the valve ball 3 in the valve body 1. In summary, each locking element 61 slidably installed in the locking sleeve 6 can keep the ball valve in the working or cut-off state and prevent it from being opened or closed unintentionally, thereby enabling the ball valve to operate stably and ensuring that the valve cannot be operated arbitrarily without the correct tools or authority, thus effectively preventing misoperation.

[0034] The system also includes guide rods 8, the same number as the locking components 61, slidably mounted on the locking sleeve 6, and corresponding matching springs 9 fitted onto the guide rods 8. Each guide rod 8 includes a mounting ring 81. One end of each matching spring 9 is fixedly connected to the locking component 61 by welding or other means, and the other end is fixed to the corresponding mounting ring 81 by welding or other means. The locking sleeve 6 is provided with a matching groove 62 corresponding to each matching spring 9. The diameter of each mounting ring 81 is larger than the diameter of the corresponding guide rod 8. Each locking sleeve 6 is provided with a limiting hole 63 with the same diameter as the mounting ring 81 on the outside of each matching groove 62. Since one end of the matching spring 9 is fixed to the locking component 61 and the other end is fixed to the corresponding mounting ring 81, when the matching component 7 is inserted downwards into the valve stem 2, the matching ring 71 faces downwards and can contact the locking component 61 located in each through groove 21, thereby... Each locking element 61 applies a radially outward force to compress each mating spring 9. At this time, since each mating spring 9 is fitted with a guide rod 8, the guide rod 8 can guide the deformation direction of each mating spring 9. At the same time, since the diameter of each mounting ring 81 is larger than the corresponding mating groove 62, during the process of compressing each mating spring 9 and driving the guide rod 8 to move radially outward, the mounting ring 81 can only move within the limiting hole 63, thus restricting the movement path of the mounting ring 81. Since the mounting ring 81 cannot move inward past the limiting hole 63, it indirectly limits the volume of the locking element 61 located in the corresponding through groove 21. At the same time, when the mating element 7 is separated from the valve stem 2 and removed, the elastic action of each mating spring 9 will push each locking element 61 to move towards the corresponding through groove 21, thus locking the valve stem 2 again and preventing the valve stem 2 from rotating.

[0035] Preferably, the valve stem 2 is provided with a mounting groove 22 corresponding to the mating part 7. The bottom diameter of the mating part 7 is smaller than the diameter of the mounting groove 22. Since the bottom diameter of the mating part 7 is smaller than the diameter of the mounting groove 22 on the valve stem 2, when the mating part 7 is inserted downward into the mounting groove 22, the mating part 7 with a smaller diameter than the mounting groove 22 can more easily align with the mounting groove 22 and be inserted into the mounting groove 22, thereby moving downward to open each locking part 61 and realizing the connection with the valve stem 2.

[0036] Preferably, each of the locking members 61 is arranged in a trapezoidal shape, narrower at the top and wider at the bottom, and each includes an inner guide surface 611. Each guide surface 611 is inclined from top to bottom and from the outside to the inside. Since the guide surface 611 of each locking member 61 is located on the inside, during the process of the locking member 61 sliding radially along the locking sleeve 6 to enter or separate from the through groove 21, the inclined guide surface 611 makes it easier for the locking member 61 to align with the corresponding through groove 21 for entry and separation.

[0037] The mating ring 71 is tapered from top to bottom, and its outer wall fits against each guide surface 611. The tapered design of the mating ring 71 facilitates the insertion of the mating part 7 into the mounting groove 22. At the same time, since the outer wall of the mating ring 71 fits against the guide surface 611 of each locking part 61, the contact area between the mating ring 71 and the guide surface 611 of each locking part 61 is increased. Therefore, as the mating part 7 moves downward, the mating ring 71 gradually approaches each locking part 61, thereby stably applying a radially outward force to each part of the locking part 61 and thus opening each locking part 61.

[0038] The mating component 7 also includes a top limiting cover 10. The limiting cover 10 is fitted onto the valve stem 2 and is detachably connected to the valve stem 2 by means of fastening or other means. Since the limiting cover 10 is fitted onto the valve stem 2 and is detachable from the valve stem 2, after the mating component 7 is pushed down and radially outward to open each locking component 61, the limiting cover 10 will be located on the top circumference of the valve stem 2. After the limiting rod and the valve stem 2 are fixedly connected, the limiting rod can be stably inserted into the mounting groove 22, thereby making the limiting ring stably located inside each locking component 61. This prevents each locking component 61 from moving radially inward, while the valve stem 2 can rotate freely. At this time, by rotating the limiting cover 10 or the valve stem 2, the valve ball 3 can be driven to rotate.

[0039] Preferably, the limiting cover 10, made of a deformable material such as rubber, is integrally formed with a plurality of connecting blocks 101 made of a deformable material such as rubber. The valve stem 2 is provided with a connecting slot 23 corresponding to each connecting block 101. Each connecting block 101 has an inwardly recessed, annularly arranged limiting slot 1011. The valve stem 2 is provided with limiting blocks 24 within each limiting slot 1011. Therefore, after the mating part 7 moves down, causing the limiting cover 10 to fall circumferentially on the top of the valve stem 2, the limiting cover 10 can be bent to allow each connecting block 101 on the limiting cover 10 to fall into the connecting slot 23 of the valve stem 2. The portion inside the limiting slot 1011 will first contact the limiting blocks 24 of each connecting slot 23, and then forcefully pass over the corresponding limiting blocks 24 so that the limiting blocks 24 cooperate with the limiting slot 1011, thereby allowing the limiting cover 10 to be stably connected to the valve stem 2. When it is necessary to remove the limiting component from the mounting groove 22, the limiting cover 10 is pried open, causing the portion of each connecting block 101 on the limiting cover 10 located inside the corresponding limiting slot 1011 to forcefully move outward and pass over the corresponding limiting blocks 24, so that each connecting block 101 will separate from the corresponding connecting slot 23, thereby separating the limiting cover 10 from the top of the valve stem 2 and removing the mating component 7 from the valve stem 2.

[0040] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A ball valve with anti-accidental opening function, comprising a valve body, a valve stem rotatably mounted on the valve body, a valve ball located within the valve body and fixedly connected to the valve body, wherein the valve ball is provided with a flow channel, and the valve body includes an inlet channel and an outlet channel located on the left and right sides of the flow channel, characterized in that: It also includes a locking sleeve and a fitting for inserting a valve stem. The locking sleeve is located at the top of the valve body and around the valve stem. Several locking elements are slidably connected inside the locking sleeve. The valve stem is provided with a through groove corresponding to each locking element. The fitting is inserted into the valve stem and includes a fitting ring for radially pushing outwards to open each locking element. The fitting is detachably connected to the valve stem.

2. The ball valve with anti-misoperation function according to claim 1, characterized in that: It also includes guide rods that are slidably mounted on the locking sleeve in the same number as the locking components, and matching springs that are sleeved on the corresponding guide rods. Each guide rod includes a mounting ring. One end of each matching spring is fixedly connected to the locking component and the other end is fixed to the corresponding mounting ring. Each locking sleeve is provided with a matching groove corresponding to each matching spring. The diameter of each mounting ring is larger than the diameter of the corresponding guide rod. Each locking sleeve is provided with a limiting hole with the same diameter as the mounting ring on the outside of each matching groove.

3. The ball valve with anti-misoperation function according to claim 2, characterized in that: The valve stem has a mounting groove for the mating part, and the bottom diameter of the mating part is smaller than the diameter of the mounting groove.

4. The ball valve with anti-misoperation function according to claim 1 or 2, characterized in that: Each of the aforementioned locking components is arranged in a trapezoidal shape, narrower at the top and wider at the bottom, and each includes an inner guide surface. Each guide surface is inclined from top to bottom and from the outside to the inside.

5. The ball valve with anti-misoperation function according to claim 3, characterized in that: The mating ring is designed with a constricted opening from top to bottom, and the outer wall of the mating ring fits against each guide surface.

6. The ball valve with anti-misoperation function according to claim 4, characterized in that: The fitting also includes a top limiting cover, which is fitted onto the valve stem and is detachably connected to the valve stem.

7. The ball valve with anti-misoperation function according to claim 6, characterized in that: The limiting cover, made of a material prone to deformation, is integrally formed with several connecting blocks made of the same material. The valve stem is provided with a connecting slot corresponding to each connecting block. Each connecting block has a ring-shaped limiting slot recessed inward. The valve stem is provided with a limiting block within each limiting slot.

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