Valve capable of preventing mistaken opening

Abstract

The utility model provides a valve capable of preventing mistaken opening. The valve comprises a valve body, a valve element, a valve rod and a handle. The lower end of the valve rod is fixedly connected with the valve core, and the upper end penetrates out of the valve body; the handle sleeves the valve rod in a sliding manner and is used for driving the valve rod to rotate; a first limiting block is arranged on the handle, and a check block matched with the first limiting block is arranged on the valve body. The check block and the first limiting block are configured in the mode that when the handle rotates to the valve closing state and slides to the locking position, the check block abuts against the first limiting block, and the handle is prevented from rotating in the valve opening direction; when the handle rotates to the valve opening state or slides to the unlocking position, the check block releases the first limiting block, and the handle restores to the free rotating state. After the valve is closed by rotating the handle, the handle can slide downwards to the locking position, the first limiting block is limited through the check block, the handle is prevented from rotating in the direction of opening the valve, and therefore the problem that the valve is opened by mistake due to the fact that the handle is pulled by mistake is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to a valve that prevents mis-opening. Background Art

[0002] Valves are pipeline accessories used to open and close pipelines, control flow direction, and adjust and control the parameters (temperature, pressure and flow) of the conveying medium.

[0003] Small ball valves are a common type of existing valves and are often used in scenarios with smaller flow rates. The valve is opened or closed by turning the handle 90 degrees, achieving convenient and quick opening and closing.

[0004] The problem with existing valves is that due to the short opening and closing stroke of small ball valves and the handle being usually long and rectangular, the handle can be easily mis-turned in some specific application scenarios, causing the valve to open by mistake, thereby causing the medium to leak. Utility Model Content

[0005] The utility model provides an anti-mis-opening valve, which solves the problem in the prior art that the handle of the valve is easily mis-turned in some specific scenarios, resulting in mis-opening of the valve and causing medium leakage.

[0006] The technical solution of the utility model is achieved in this way:

[0007] The utility model provides an anti-mis-opening valve, comprising a valve body, a valve core, a valve stem and a handle, wherein a flow channel is arranged in the valve body, and the valve core is arranged in the flow channel; the lower end of the valve stem is fixedly connected to the valve core, and the upper end passes through the valve body; the handle sliding sleeve is arranged outside the valve stem, and is used to drive the valve stem to rotate and drive the valve to rotate to open and close the valve; the handle is provided with a first limit block, and the valve body is provided with a stopper matched with the first limit block; the stopper and the first limit block are configured as follows:

[0008] When the handle is rotated to the valve closing state and slides to the locking position, the stopper abuts against the first limit block to prevent the handle from rotating in the direction of opening the valve;

[0009] When the handle is rotated to the valve opening state or slides to the unlocking position, the stopper releases the first limit block, and the handle resumes the free rotation state.

[0010] The utility model provides a handle which is slidably sleeved on the outside of the valve stem, and a first limit block is provided on the handle, and a stop block which cooperates with the first limit block is provided on the valve body, so that after the handle is rotated to close the valve, the handle is slid downward to a locking position, and the first limit block is limited by the stop block to prevent the handle from rotating in the direction of opening the valve, thereby avoiding the problem of the valve opening by mistake due to the handle being accidentally turned.

[0011] Preferably, the bottom surface of the first limiting block is an inclined surface, and the inclined surface is configured as follows:

[0012] When the handle slides to the locking position, the first limit block is allowed to pass the stopper when the handle rotates in the direction of closing the valve, and the first limit block is prevented from passing the stopper when the handle rotates in the direction of opening the valve.

[0013] By designing the bottom surface of the first limit block as an inclined surface, when the handle is rotated to switch the valve from an open state to a closed state, the stopper cooperates with the inclined surface of the first limit block, and the first limit block is lifted up by the stopper to drive the handle to slide upward to the unlocking position, so that the first limit block passes through the stopper without manually lifting the handle upward, which is convenient for operation. When the valve needs to be switched from a closed state to an open state, the handle needs to be lifted upward to rotate the handle to open the valve, thereby preventing the valve from opening by mistake.

[0014] Specifically, the radial cross-section of the sliding fitting portion between the valve stem and the handle is non-circular. The purpose of this design is to ensure that the handle can slide along the axial direction of the valve stem and that the valve stem can be driven to rotate when the handle is rotated to open and close the valve.

[0015] Preferably, a compression spring is provided on the outer sleeve of the valve stem, and a limit assembly is provided on the top of the valve stem. The two ends of the compression spring are respectively in contact with the limit assembly and the handle. The compression spring can provide a downward pre-tightening force to the handle so that the handle is always in a locked position. When the handle is rotated to the valve closing state, the handle is automatically locked; when the valve needs to be opened, the handle can be manually lifted up to the unlocking position, and then the handle can be rotated to open the valve, thereby preventing the valve from opening by mistake.

[0016] Furthermore, the limiting assembly is an adjusting nut, and the adjusting nut is connected to the valve stem through a threaded pair. The compression spring is limited by the adjusting nut, so that the preload force of the compression spring can be adjusted according to needs.

[0017] Specifically, the handle is further provided with a second limit block and a third limit block, and the second limit block and the third limit block are configured as follows:

[0018] When the handle is rotated to the valve closing state, the stopper abuts against the second limit block to prevent the handle from rotating in the direction of closing the valve;

[0019] When the handle is rotated to a fully open state of the valve, the stopper abuts against the third limit block to prevent the handle from rotating in a direction to open the valve.

[0020] The utility model provides a second limit block and a third limit block on the handle, which can cooperate with the stopper to limit the rotation angle of the handle within a range of 90° from the valve being fully opened to being closed.

[0021] Furthermore, the bottom heights of the second limit block and the third limit block are lower than the bottom height of the first limit block, preventing the stopper from passing under the second limit block or the third limit block after the handle is lifted up to the unlocking position, thereby causing the second limit block and the third limit block to lose the restriction on the rotation angle of the handle. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 This is a three-dimensional diagram of a valve for preventing accidental opening of the utility model;

[0024] Figure 2 This is an explosion schematic diagram of an anti-mis-opening valve of the utility model;

[0025] Figure 3 This is a schematic diagram of the state of the valve when the handle slides to the unlocked state in the embodiment of the utility model;

[0026] Figure 4 This is a schematic diagram of the state when the handle is rotated to the valve fully open in the embodiment of the utility model;

[0027] In the figure: 1. valve body; 2. valve stem; 3. handle; 4. first limit block; 5. stop block; 6. inclined surface; 7. compression spring; 8. adjusting nut; 9. second limit block; 10. third limit block. DETAILED DESCRIPTION

[0028] The technical solution of the utility model will be described clearly and completely in conjunction with the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] Reference Figures 1 to 4The utility model provides an anti-mis-opening valve, including a valve body 1, a valve core (not shown in the figure), a valve stem 2 and a handle 3. A flow channel is arranged in the valve body 1, and the valve core is arranged in the flow channel; the lower end of the valve stem 2 is fixedly connected to the valve core, and the upper end passes through the valve body 1; the handle 3 is slidably sleeved on the outside of the valve stem 2, and is used to drive the valve stem 2 to rotate and drive the valve to rotate to open and close the valve; a first limit block 4 is arranged on the handle 3, and a stop block 5 cooperating with the first limit block 4 is arranged on the valve body 1; the stop block 5 and the first limit block 4 are configured as follows:

[0030] When the handle 3 rotates to the valve closing state and slides to the locking position, the stopper 5 abuts against the first limit block 4 to prevent the handle 3 from rotating in the direction of opening the valve;

[0031] When the handle 3 rotates to the valve opening state or slides to the unlocking position, the stopper 5 releases the first limit block 4, and the handle 3 resumes the free rotation state.

[0032] The utility model provides a handle 3 which is slidably sleeved on the outside of the valve stem 2, and a first limit block 4 is provided on the handle 3, and a stop block 5 which cooperates with the first limit block 4 is provided on the valve body 1, so that after the handle 3 is rotated to close the valve, the handle 3 can be slid downward to a locked position, and the first limit block 4 can be limited by the stop block 5 to prevent the handle 3 from rotating in the direction of opening the valve, thereby avoiding the problem of the valve being accidentally opened due to the handle 3 being accidentally turned.

[0033] In this embodiment, when the handle 3 slides upward to the unlocking position, the bottom surface of the first limit block 4 is located above the top surface of the block 5. At this time, the block 5 cannot block the first limit block 4, and the handle 3 can rotate freely; when the handle 3 slides downward to the locking position, the bottom surface of the first limit block 4 is located below the top surface of the block 5. At this time, the block 5 can block the first limit block 4 and prevent the handle 3 from rotating.

[0034] Preferably, the bottom surface of the first limiting block 4 is an inclined surface 6, and the inclined surface 6 is configured as follows:

[0035] When the handle 3 slides to the locking position, the first limit block 4 is allowed to pass the stopper 5 when the handle 3 rotates in the direction of closing the valve, and the first limit block 4 is prevented from passing the stopper 5 when the handle 3 rotates in the direction of opening the valve.

[0036] By designing the bottom surface of the first limit block 4 as an inclined surface 6, when the handle 3 is rotated to switch the valve from the open state to the closed state, the stopper 5 cooperates with the inclined surface 6 of the first limit block 4, and the first limit block 4 is lifted up by the stopper 5 to drive the handle 3 to slide upward to the unlocking position, so that the first limit block 4 passes through the stopper 5 without manually lifting the handle 3 upward, which is convenient for operation. When the valve needs to be switched from the closed state to the open state, the handle 3 needs to be lifted upward to rotate the handle 3 to open the valve, thereby preventing the valve from being opened by mistake.

[0037] Specifically, the radial cross-section of the sliding fitting part of the valve stem 2 and the handle 3 is non-circular (such as rectangular, square, D-shaped, rectangular in the middle and semicircular at both ends, etc.). The purpose of this design is to ensure that the handle 3 can slide along the axial direction of the valve stem 2, and to ensure that when the handle 3 is rotated, the valve stem 2 is driven to rotate to open and close the valve.

[0038] Preferably, a compression spring 7 is provided on the outer sleeve of the valve stem 2, and a limit assembly is provided on the top of the valve stem 2. The two ends of the compression spring 7 are respectively in contact with the limit assembly and the handle 3. The compression spring 7 can provide a downward pre-tightening force to the handle 3, so that the handle 3 is always in the locked position. When the handle 3 is rotated to the valve closing state, the handle 3 is automatically locked (no need to manually press the handle 3 down to the locked position); when the valve needs to be opened, the handle 3 needs to be manually lifted up to the unlocking position, and then the handle 3 is rotated to open the valve, thereby preventing the valve from opening by mistake.

[0039] Furthermore, the limiting component can be an adjusting nut 8, which is connected to the valve stem 2 through a threaded pair. The compression spring 7 is limited by the adjusting nut 8, so that the preload force of the compression spring 7 can be adjusted according to needs.

[0040] In this embodiment, a washer is further provided on the bottom surface of the nut. The outer diameter of the washer is larger than the outer diameter of the nut and the compression spring 7. The compression spring 7 is limited by the washer.

[0041] Specifically, the handle 3 is further provided with a second limit block 9 and a third limit block 10, and the second limit block 9 and the third limit block 10 are configured as follows:

[0042] When the handle 3 rotates to the valve closing state, the stopper 5 abuts against the second limit block 9 to prevent the handle 3 from rotating in the direction of closing the valve;

[0043] When the handle 3 rotates to the fully open state of the valve, the stopper 5 abuts against the third limit block 10 to prevent the handle 3 from rotating in the direction of opening the valve.

[0044] The utility model provides the second limit block 9 and the third limit block 10 on the handle 3 to cooperate with the stop block 5 to limit the rotation angle of the handle 3 within a range of 90° from fully open to closed.

[0045] Furthermore, the bottom heights of the second limit block 9 and the third limit block 10 are lower than the bottom height of the first limit block 4, preventing the stop block 5 from passing under the second limit block 9 or the third limit block 10 after the handle 3 is lifted up to the unlocking position, thereby causing the second limit block 9 and the third limit block 10 to lose the restriction on the rotation angle of the handle 3.

[0046] The working principle of the anti-misopening valve in this embodiment is as follows:

[0047] When the valve needs to be switched from an open state to a closed state, the handle 3 is directly rotated counterclockwise. When the stopper 5 is rotated to abut against the inclined surface 6 at the bottom of the first limit block 4, the handle 3 is rotated further, and the first limit block 4 is lifted by the stopper 5, so that the handle 3 slides upward along the axial direction of the valve stem 2 to the unlocking position (such as Figure 3 As shown in the figure, when the handle 3 is rotated until the valve is closed, the first limit block 4 just passes the stop block 5 (the first limit block 4 moves from the right side of the stop block 5 to the left side). At this time, under the action of the compression spring 7, the handle 3 slides downward to the locking position, and the stop block 5 blocks the first limit block 4 to prevent the handle 3 from rotating and causing the valve to open by mistake; at the same time, the stop block 5 also limits the second limit block 9 on the other side to prevent the handle 3 from continuing to rotate in the direction of valve closing (counterclockwise). Figure 1 shown.

[0048] When the valve needs to be switched from the closed state to the fully open state, the handle 3 needs to be lifted up (to overcome the elastic potential energy of the compression spring 7) to the unlocking position (such as Figure 3 As shown), the handle 3 is rotated clockwise at the same time. When the first limit block 4 passes the stop block 5 (the first limit block 4 moves from the left side of the stop block 5 to the right side), the handle 3 can be released. The handle 3 will automatically slide downward to the locking position under the action of the compression spring 7. The handle 3 is continued to be rotated until the valve is fully opened. At this time, the stop block 5 just contacts the third limit block 10 on the handle 3 to prevent the handle 3 from continuing to rotate in the direction of valve opening (clockwise) (as shown). Figure 4 shown).

[0049] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A valve for preventing accidental opening, comprising a valve body (1), a valve core, a valve stem (2) and a handle (3), wherein a flow channel is arranged in the valve body (1), and the valve core is arranged in the flow channel; the lower end of the valve stem (2) is fixedly connected to the valve core, and the upper end thereof passes through the valve body (1); characterized in that: The handle (3) is slidably sleeved outside the valve stem (2) and is used to drive the valve stem (2) to rotate; the handle (3) is provided with a first limit block (4), and the valve body (1) is provided with a stop block (5) that cooperates with the first limit block (4); the stop block (5) and the first limit block (4) are configured as follows: When the handle (3) is rotated to a valve closing state and slides to a locked position, the stopper (5) abuts against the first limit block (4) to prevent the handle (3) from rotating in a direction to open the valve; When the handle (3) is rotated to a valve opening state or slides to an unlocking position, the stopper (5) releases the first limit block (4), and the handle (3) returns to a free rotation state.

2. The anti-mis-opening valve according to claim 1, characterized in that: The bottom surface of the first limiting block (4) is an inclined surface (6), and the inclined surface (6) is configured as follows: When the handle (3) slides to the locking position, the first limit block (4) passes through the stop block (5) when the handle (3) is allowed to rotate in the direction of closing the valve, and the first limit block (4) passes through the stop block (5) when the handle (3) is prevented from rotating in the direction of opening the valve.

3. A mis-opening prevention valve as claimed in claim 1 or 2, characterized in that: The radial cross section of the sliding fitting portion of the valve stem (2) and the handle (3) is non-circular.

4. A mis-opening prevention valve as claimed in claim 1 or 2, characterized in that: The outer sleeve of the valve stem (2) is provided with a compression spring (7), the top of the valve stem (2) is provided with a limit assembly, and the two ends of the compression spring (7) are respectively in contact with the limit assembly and the handle (3).

5. The anti-mis-opening valve according to claim 4, characterized in that: The limit assembly is an adjusting nut (8), and the adjusting nut (8) is connected to the valve stem (2) via a threaded pair.

6. The anti-mis-opening valve according to claim 1 or 2, characterized in that: The handle (3) is further provided with a second limit block (9) and a third limit block (10), and the second limit block (9) and the third limit block (10) are configured as follows: When the handle (3) is rotated to a valve closing state, the stopper (5) abuts against the second limit block (9) to prevent the handle (3) from rotating in a direction of closing the valve; When the handle (3) is rotated to a fully valve-open state, the stopper (5) abuts against the third limit block (10), preventing the handle (3) from rotating in a direction to open the valve.

7. The anti-mis-opening valve according to claim 6, characterized in that: The bottom surface heights of the second limiting block (9) and the third limiting block (10) are both lower than the bottom surface height of the first limiting block (4).

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