Ball valve with automatic reset switch

Abstract

The application relates to the technical field of valves, in particular to a ball valve with an automatic reset switch, which comprises a valve seat, a valve core built in the valve seat to control the on-off of the flow path of the valve seat, a valve cover fixedly connected to the valve seat, a valve rod fixedly connected to the valve core and rotatingly penetrating through the valve cover, and a handle fixedly connected to the upper portion of the valve rod and located above the valve cover, the valve cover is fixedly connected with a mounting frame, the mounting frame is fixedly connected with a limiting block, the handle comprises a connecting piece fixedly sleeved on the upper portion of the valve rod and a holding pipe fixedly connected to the connecting piece, the limiting block is provided with a first abutting surface and a second abutting surface for the abutment of the connecting piece, the valve seat is in an open state when the connecting piece abuts against the first abutting surface, and the valve seat is in a closed state when the connecting piece abuts against the second abutting surface, an elastic piece is arranged between the limiting block and the holding pipe and forces the connecting piece to abut against the first abutting surface under normal conditions. Under the action of the elastic piece, the holding pipe is prevented from being accidentally closed due to accidental touch or accidental rotation.

Description

Technical Field

[0001] This application relates to the field of valve technology, and in particular to a ball valve with an automatic reset switch. Background Technology

[0002] In the field of valve technology, the conventional method for opening and closing ball valves is to rotate the valve stem using a handle, which in turn rotates the valve core. When the valve needs to be opened, the operator manually turns the handle, causing the valve stem to rotate and move the valve core to the open position, allowing the medium to flow smoothly within the valve body. Conversely, when the valve needs to be closed, the handle is turned in the opposite direction, causing the valve core to rotate to the closed position, blocking the flow of the medium. This operation method is simple and direct, and in many cases, it meets basic usage requirements.

[0003] In applications where ball valves need to remain open, the handle is prone to accidental contact or forgetting to rotate it back to its original position after rotation, causing the valve core inside the valve seat to close unexpectedly and interfering with the normal operation of the ball valve. Therefore, further improvements are needed. Utility Model Content

[0004] To address the aforementioned problems, this application provides a ball valve with an automatic reset switch.

[0005] The ball valve with an automatic reset switch provided in this application adopts the following technical solution: A ball valve with an automatic reset switch includes a valve seat, a valve core built into the valve seat to control the opening and closing of the valve seat flow path, a valve cover fixedly connected to the valve seat, a valve stem fixedly connected to the valve core and rotatably passing through the valve cover, and a handle fixedly connected to the upper part of the valve stem and located above the valve cover. The valve cover is fixedly connected to a mounting bracket, and the mounting bracket is fixedly connected to a limiting block. The handle includes a connecting piece fixedly sleeved on the upper part of the valve stem and a gripping tube fixedly connected to the connecting piece. The limiting block has a first abutting surface and a second abutting surface for the connecting piece to abut. When the connecting piece abuts against the first abutting surface, the valve seat is in an open state, and when the connecting piece abuts against the second abutting surface, the valve seat is in a closed state. An elastic element is provided between the limiting block and the gripping tube to force the connecting piece to abut against the first abutting surface under normal conditions.

[0006] By adopting the above technical solution, the first and second contact surfaces of the limiting block can limit the connecting piece, determining the opening and closing state of the ball valve. When it is necessary to block the medium, the connecting piece, valve stem, and valve core can be rotated by turning the gripping tube. At this time, the elastic element undergoes elastic deformation and has elastic potential energy. After the force on the gripping tube is removed, the elastic element forces the gripping tube to rotate and reset. Under the action of the elastic element, the valve core is prevented from being accidentally closed due to accidental contact or rotation of the gripping tube, ensuring the normal operation of the ball valve.

[0007] Preferably, the elastic element is a tension spring, the limiting block is fixedly connected to a first pull ring, the end of the gripping tube away from the connecting piece has a second pull ring built in, one end of the tension spring is hooked to the first pull ring, the end of the gripping tube near the connecting piece is an open end, and the other end of the tension spring extends into the gripping tube and the end hook is hooked to the second pull ring.

[0008] By adopting the above technical solution, the elastic element is set as a tension spring, and the first pull ring and the second pull ring are respectively connected to the two ends of the tension spring, so that the tension spring can be connected between the limiting block and the gripping tube.

[0009] Preferably, the grip tube is provided with an adjustment component that adjusts the position of the second pull ring inside the grip tube to adjust the preload of the tension spring.

[0010] By adopting the above technical solution, the position of the second pull ring in the grip tube can be adjusted by setting the adjustment component, and the preload of the tension spring can be adjusted so that the force of the elastic element forcing the connecting piece to abut against the first abutment surface can be adjusted according to actual needs, avoiding poor handle reset effect or operation difficulty due to unsuitable preload of the elastic element.

[0011] Preferably, the end of the gripping tube away from the connecting piece is an open end, and the inner wall of the end of the gripping tube away from the connecting piece has a threaded portion. The adjusting assembly includes a stud threaded to the threaded portion and a rotating piece coaxially rotatably connected to the stud near the end of the connecting piece. The second pull ring is fixedly connected to the rotating piece.

[0012] By adopting the above technical solution, the position of the rotating plate and the second pull ring in the holding tube can be adjusted by rotating the stud, thereby adjusting the preload of the tension spring, ensuring that the elastic element can stably and effectively force the connecting plate to abut against the first abutment surface during the use of the ball valve, so that the valve seat remains open.

[0013] Preferably, the end of the stud furthest from the connecting piece is coaxially provided with a rotation groove.

[0014] By adopting the above technical solution, a rotating groove is opened coaxially at the end of the stud away from the connecting piece, so that the operator can use a tool to insert into the rotating groove to rotate the stud, which facilitates the adjustment of the tension spring preload.

[0015] Preferably, the end of the grip tube away from the connecting piece is a closed end, and the adjustment assembly includes a slider that slides axially to the inner wall of the grip tube and a lead screw threaded through the end of the grip tube away from the connecting piece. The lead screw is rotatably connected to the slider, and a second pull ring is fixedly connected to the end of the slider near the connecting piece.

[0016] By adopting the above technical solution, the adjusting component drives the slider to slide axially along the inner wall of the gripping tube through the rotation of the lead screw, which can adjust the position of the second pull ring in the gripping tube, and thus adjust the preload of the tension spring.

[0017] Preferably, the adjustment assembly further includes a knob fixedly connected to the end of the lead screw and externally located in the grip tube.

[0018] By adopting the above technical solution, the position of the slider inside the holding tube can be changed by rotating the knob to drive the lead screw to rotate, thereby adjusting the preload of the tension spring.

[0019] In summary, this utility model has the following beneficial effects: 1. The first and second contact surfaces of the limiting block can limit the connecting piece to determine the opening and closing state of the ball valve. When it is necessary to block the medium, the connecting piece, valve stem and valve core can be rotated by turning the grip tube. At this time, the elastic element undergoes elastic deformation and has elastic potential energy. After the force on the grip tube is removed, the elastic element forces the grip tube to rotate and reset. Under the action of the elastic element, the valve core is prevented from being accidentally closed due to accidental contact or rotation of the grip tube, thus ensuring the normal operation of the ball valve. 2. The adjustment component adjusts the position of the second pull ring inside the grip tube, and the tension spring preload can be adjusted so that the force of the elastic element forcing the connecting piece against the first contact surface can be adjusted according to actual needs, avoiding poor handle reset effect or operation difficulty due to unsuitable elastic element preload. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of a ball valve with an automatic reset switch in Embodiment 1; Figure 2 This is a top view of the ball valve in Example 1; Figure 3 This is a schematic diagram of the internal structure of the grip tube in Example 1; Figure 4 This is a schematic diagram of the adjustment component in Embodiment 2; Figure 5 This is a schematic diagram of the adjustment component in Example 3.

[0021] In the diagram, 1. Valve seat; 2. Valve core; 3. Valve cover; 31. Mounting bracket; 32. Limiting block; 321. First abutment surface; 322. Second abutment surface; 323. First pull ring; 324. Stop edge; 4. Valve stem; 5. Handle; 51. Connecting piece; 52. Mounting sleeve; 53. Grip tube; 531. Mounting plate; 532. Second pull ring; 533. Slide groove; 6. Tension spring; 7. Adjusting assembly; 71. Stud; 711. Rotating groove; 72. Rotating plate; 73. Sliding block; 731. Sliding protrusion; 74. Lead screw; 75. Knob. Detailed Implementation

[0022] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail.

[0023] Example 1: This application discloses a ball valve with an automatic reset switch, referring to... Figure 1 The valve includes a valve seat 1, a valve core 2 built into the valve seat 1 to control the flow path of the valve seat 1, a valve cover 3 fixedly connected to the upper part of the valve seat 1, a valve stem 4 fixedly connected to the valve core 2 and rotatably passing through the valve cover 3, and a handle 5 fixedly connected to the upper part of the valve stem 4 and located above the valve cover 3. The connection structure between the valve seat 1, valve core 2, valve cover 3 and valve stem 4 is all prior art and will not be described in detail here.

[0024] Reference Figure 1 , Figure 2 The valve cover 3 is fixedly connected to a mounting bracket 31. The valve stem 4 rotatably passes through the mounting bracket 31. A limiting block 32 located outside the valve stem 4 is fixedly connected to the upper end face of the mounting bracket 31. The handle 5 includes a connecting piece 51 fixedly sleeved on the upper part of the valve stem 4, a mounting sleeve 52 fixedly connected to the connecting piece 51, and a gripping tube 53 fixedly inserted into the mounting sleeve 52. The mounting sleeve 52 is located above the limiting block 32. In this embodiment, the mounting sleeve 52 and the gripping tube 53 are threadedly connected. In other embodiments, the gripping tube 53 and the mounting sleeve 52 can be fixed by welding. The limiting block 32 has a first abutting surface 321 and a second abutting surface 322. The connecting piece 51 has a first abutting part abutting against the first abutting surface 321 and a second abutting part abutting against the second abutting surface 322. When the first abutting part abuts against the first abutting surface 321, the valve seat 1 is in the open state. When the second abutting part abuts against the second abutting surface 322, the valve seat 1 is in the closed state.

[0025] Reference Figure 2 , Figure 3 An elastic element is provided between the limiting block 32 and the gripping tube 53 under normal conditions, which forces the gripping tube 53 to rotate to the first abutting part and abut against the first abutting surface 321. Specifically, the elastic element is a tension spring 6. A first pull ring 323 is fixedly connected to the upper surface of one end of the limiting block 32. A mounting plate 531 is fixedly connected to the inner wall of the gripping tube 53. A second pull ring 532 is fixedly connected to the mounting plate 531. One end of the tension spring 6 is hooked to the first pull ring 323. The end of the gripping tube 53 near the connecting piece 51 is an open end. The other end of the tension spring 6 extends into the gripping tube 53 and the end hook is hooked to the second pull ring 532. A retaining edge 324 protrudes and is fixed to the upper surface of the limiting block 32 near the edge of the valve stem 4. The tension spring 6 is always in a stretched state and abuts against the retaining edge 324.

[0026] The implementation principle of a ball valve with an automatic reset switch in this application embodiment is as follows: When it is necessary to close the valve seat 1 to block the medium, the connecting piece 51, valve stem 4 and valve core 2 can be rotated together by turning the grip tube 53, so that the second abutting part abuts against the second abutting surface 322. At this time, the tension spring 6 is further stretched and has elastic potential energy. After the force on the grip tube 53 is removed, the tension spring 6 forces the grip tube 53 to rotate and reset. Under the action of the tension spring 6, the valve core 2 is prevented from being accidentally closed due to accidental contact or rotation of the grip tube 53, thus ensuring the normal operation of the ball valve.

[0027] Example 2: The difference from Example 1 is that, referring to Figure 4 In this embodiment, the position of the second pull ring 532 within the gripping tube 53 is adjustable. The gripping tube 53 is equipped with an adjusting assembly 7 that adjusts the position of the second pull ring 532 within the gripping tube 53, thereby adjusting the preload of the tension spring 6. The end of the gripping tube 53 away from the mounting sleeve 52 is an open end, and the inner wall of the end of the gripping tube 53 away from the mounting sleeve 52 has a threaded portion. The adjusting assembly 7 includes a stud 71 threadedly connected to the threaded portion and a rotating plate 72 coaxially rotatably connected to the end of the stud 71 near the mounting sleeve 52. The second pull ring 532 is fixedly connected to the rotating plate 72. The end of the stud 71 away from the mounting sleeve 52 is coaxially provided with a rotating groove 711. The operator can use a tool to insert into the rotating groove 711 and rotate the stud 71, thereby adjusting the position of the rotating plate 72 and the second pull ring 532 within the gripping tube 53, and thus adjusting the preload of the tension spring 6.

[0028] Example 3: The difference from Example 2 is that, referring to Figure 5 The end of the grip tube 53 furthest from the mounting sleeve 52 is a closed end. The adjusting assembly 7 includes a slider 73 axially slidably connected to the inner wall of the grip tube 53, a lead screw 74 threaded through the end of the grip tube 53 furthest from the mounting sleeve 52, and a knob 75 fixedly connected to the end of the lead screw 74 and externally placed on the grip tube 53. The lead screw 74 is rotatably connected to the slider 73, and the second pull ring 532 is fixedly connected to the end of the slider 73 near the mounting sleeve 52. The inner wall of the grip tube 53 has a groove 533, and the slider 73 has a protruding sliding protrusion 731 fixedly connected to the groove 533. By rotating the lead screw 74 through the knob 75, the slider 73 is driven to slide axially along the inner wall of the grip tube 53, which can adjust the position of the second pull ring 532 in the grip tube 53, thereby adjusting the preload of the tension spring 6.

[0029] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A ball valve with an automatic reset switch, characterized in that: The valve includes a valve seat (1), a valve core (2) built into the valve seat (1) to control the flow path of the valve seat (1), a valve cover (3) fixedly connected to the valve seat (1), a valve stem (4) fixedly connected to the valve core (2) and rotatably passing through the valve cover (3), and a handle (5) fixedly connected to the upper part of the valve stem (4) and located above the valve cover (3). The valve cover (3) is fixedly connected to a mounting bracket (31), and the mounting bracket (31) is fixedly connected to a limit block (32). The handle (5) includes a connecting piece (51) fixedly sleeved on the upper part of the valve stem (4) and... The holding tube (53) is fixedly connected to the connecting piece (51). The limiting block (32) has a first abutting surface (321) and a second abutting surface (322) for the connecting piece (51) to abut. When the connecting piece (51) abuts against the first abutting surface (321), the valve seat (1) is in the open state. When the connecting piece (51) abuts against the second abutting surface (322), the valve seat (1) is in the closed state. An elastic element is provided between the limiting block (32) and the holding tube (53) to force the connecting piece (51) to abut against the first abutting surface (321) under normal conditions.

2. A ball valve with an automatic reset switch according to claim 1, characterized in that: The elastic element is a tension spring (6), the limiting block (32) is fixedly connected to a first pull ring (323), the end of the grip tube (53) away from the connecting piece (51) has a second pull ring (532) built in, one end of the tension spring (6) is hooked to the first pull ring (323), the end of the grip tube (53) near the connecting piece (51) is an open end, and the other end of the tension spring (6) extends into the grip tube (53) and the end hook is hooked to the second pull ring (532).

3. A ball valve with an automatic reset switch according to claim 2, characterized in that: The grip tube (53) is provided with an adjustment component (7) for adjusting the position of the second pull ring (532) inside the grip tube (53) to adjust the preload of the tension spring (6).

4. A ball valve with an automatic reset switch according to claim 3, characterized in that: The end of the grip tube (53) away from the connecting piece (51) is an open end, and the inner wall of the end of the grip tube (53) away from the connecting piece (51) has a threaded part. The adjustment assembly (7) includes a stud (71) threaded to the threaded part and a rotating piece (72) coaxially rotatably connected to the end of the stud (71) near the connecting piece (51). The second pull ring (532) is fixedly connected to the rotating piece (72).

5. A ball valve with an automatic reset switch according to claim 4, characterized in that: The end of the stud (71) away from the connecting piece (51) is coaxially provided with a rotating groove (711).

6. A ball valve with an automatic reset switch according to claim 3, characterized in that: The end of the grip tube (53) away from the connecting piece (51) is a closed end. The adjustment assembly (7) includes a slider (73) that slides axially to the inner wall of the grip tube (53) and a screw (74) threaded through the end of the grip tube (53) away from the connecting piece (51). The screw (74) is rotatably connected to the slider (73). The second pull ring (532) is fixedly connected to the end of the slider (73) near the connecting piece (51).

7. A ball valve with an automatic reset switch according to claim 6, characterized in that: The adjustment assembly (7) also includes a knob (75) fixedly connected to the end of the lead screw (74) and externally located on the grip tube (53).

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