Valve with locking structure

Abstract

The utility model provides a valve with a locking structure. 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 through the mounting seat at the control end of the valve body; the handle is arranged outside the valve rod in a sleeving mode and used for driving the valve rod to rotate. A connecting arm is arranged on the bottom face of the handle in the vertical direction, and a clamping block is arranged on the inner side face of the bottom of the connecting arm. A first clamping groove and / or a second clamping groove matched with the clamping block are / is formed in the outer side face of the installation base, and the first clamping groove and the second clamping groove are configured in the mode that when the handle rotates to the state that the valve is closed, the clamping block is embedded into the first clamping groove, and rotation of the handle is stopped; and when the handle rotates until the valve is completely opened, the clamping block is embedded into the second clamping groove to prevent the handle from rotating. The valve is closed / opened by rotating the handle, the clamping block is embedded into the first clamping groove or the second clamping groove, the clamping block is limited through the first clamping groove or the second clamping groove, and the situation that the valve is opened / closed by mistake due to rotation of the handle is prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to a valve with a locking structure. 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 narrow, the handle can be easily mis-turned in certain specific application scenarios, causing the valve to be opened or closed by mistake. Utility Model Content

[0005] The utility model provides a valve with a locking structure, which solves the problem in the prior art that the handle of the valve is easily misdialed in certain specific application scenarios, resulting in the valve being mistakenly opened or closed.

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

[0007] The utility model provides a valve with a locking structure, 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 a mounting seat of a control end of the valve body; the handle is sleeved on the outside of 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; a connecting arm is vertically arranged on the bottom surface of the handle, and a clamping block is arranged on the inner side surface of the bottom of the connecting arm; a first clamping groove and / or a second clamping groove cooperating with the clamping block are arranged on the outer side surface of the mounting seat, and the first clamping groove and the second clamping groove are configured as follows:

[0008] When the handle is rotated to the valve closing state, the clamping block is embedded in the first clamping groove to prevent the handle from rotating;

[0009] When the handle is rotated to a fully open state of the valve, the clamping block is embedded in the second clamping groove to prevent the handle from rotating.

[0010] The utility model provides a connecting arm on the bottom surface of the handle, and a clamping block on the inner side surface of the bottom of the connecting arm, and provides a first clamping groove and / or a second clamping groove that cooperates with the clamping block on the outer side surface of the mounting seat, so that after the handle is rotated to close / open the valve, the clamping block is embedded in the first clamping groove or the second clamping groove, and the clamping block is limited by the first clamping groove or the second clamping groove to prevent the handle from rotating and causing the valve to be opened / closed by mistake.

[0011] Preferably, the handle sliding sleeve is arranged outside the valve stem, and the outer side surface of the mounting seat is provided with an arc groove within a certain angle range along the circumference of the valve stem, and the first clamping groove and the second clamping groove are respectively arranged at both ends of the top surface of the arc groove.

[0012] The utility model arranges the handle sliding sleeve on the outside of the valve stem, when the valve needs to be switched from a closed state to an open state, the handle can be pressed downward first to disengage the clamping block from the first clamping groove, and the handle can be rotated at the same time to move the clamping block along the arc groove until the valve is in a fully open state, at which time the clamping block just moves to the second clamping groove, and then the handle can be lifted upward to embed the clamping block in the second clamping groove, so as to prevent the handle from rotating and causing the valve to be accidentally closed; when the valve needs to be switched from a fully open state to a closed state, the handle can be pressed downward first to disengage the clamping block from the second clamping groove, and the handle can be rotated at the same time to move the clamping block along the arc groove until the valve is in a closed state, at which time the clamping block just moves to the first clamping groove, and then the handle can be lifted upward to embed the clamping block in the first clamping groove, so as to prevent the handle from rotating and causing the valve to be accidentally opened.

[0013] Furthermore, the radial cross-section of the sliding fitting portion of 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.

[0014] 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 abutted against the handle and the mounting seat. The compression spring can provide an upward pre-tightening force to the handle, so that the clamping block is always abutted against the top surface of the arc-shaped groove during the rotation of the valve, and when the valve is rotated to a closed or fully open state, the clamping block is automatically clamped into the first clamping slot or the second clamping slot under the action of the compression spring, and there is no need to manually lift the handle upward, which makes the operation more convenient.

[0015] 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.

[0016] Furthermore, the top surface of the arc-shaped groove is an inclined surface. By designing the top surface of the arc-shaped groove as an inclined surface, the preload force of the compression spring can be used to self-drive the movement of the block in the arc-shaped groove, thereby facilitating operation.

[0017] Preferably, the connecting arm, the clamping block, the first clamping slot, the second clamping slot, and the arc-shaped groove are each provided with two, and the structure is more stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] 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.

[0019] Figure 1 This is a front view of a valve with a locking structure according to the utility model;

[0020] Figure 2 This is an exploded schematic diagram of a valve with a locking structure according to the utility model;

[0021] Figure 3 This is a schematic diagram of the state of the valve when the clamping block moves in the arc-shaped groove in the embodiment of the utility model;

[0022] 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;

[0023] In the figure: 1. valve body; 2. valve stem; 3. handle; 4. mounting seat; 5. connecting arm; 6. clamping block; 7. first clamping slot; 8. second clamping slot; 9. arc-shaped groove; 10. compression spring; 11. adjusting nut; 12. inclined surface. DETAILED DESCRIPTION

[0024] 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.

[0025] Reference Figures 1 to 4 The utility model embodiment provides a valve with a locking structure, including a valve body 1, a valve core (not shown in the figure), a valve stem 2 and a handle 3. The valve body 1 is provided with a flow channel, 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 mounting seat 4 of the control end of the valve body 1; the handle 3 is 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; the bottom surface of the handle 3 is provided with a connecting arm 5 in the vertical direction, and the inner side surface of the bottom of the connecting arm 5 is provided with a clamping block 6; the outer side surface of the mounting seat 4 is provided with a first clamping groove 7 and / or a second clamping groove 8 that cooperate with the clamping block 6, and the first clamping groove 7 and the second clamping groove 8 are configured as follows:

[0026] When the handle 3 is rotated to the valve closing state, the clamping block 6 is embedded in the first clamping groove 7 to prevent the handle 3 from rotating;

[0027] When the handle 3 is rotated to the fully open state of the valve, the block 6 is embedded in the second slot 8 to prevent the handle 3 from rotating.

[0028] The utility model arranges a connecting arm 5 on the bottom surface of the handle 3, and arranges a clamping block 6 on the inner side surface of the bottom of the connecting arm 5, and arranges a first clamping groove 7 and / or a second clamping groove 8 that cooperate with the clamping block 6 on the outer side surface of the mounting seat 4, so that after the handle 3 is rotated to close / open the valve, the clamping block 6 is embedded in the first clamping groove 7 or the second clamping groove 8, and the clamping block 6 is limited by the first clamping groove 7 or the second clamping groove 8 to prevent the handle 3 from rotating and causing the valve to be opened / closed by mistake.

[0029] In this embodiment, the connecting arm 5 can be made of elastic material. When it is necessary to switch the opening and closing state of the valve, the connecting arm 5 can be pulled outward to disengage the block 6 from the first slot 7 or the second slot 8, and then the handle 3 can be rotated to open and close the valve. When the handle 3 is rotated until the valve is closed or fully opened, the block 6 can be automatically embedded in the first slot 7 or the second slot 8.

[0030] In this embodiment, the connecting arm 5 and the clamping block 6 are an integrally formed "L"-shaped structure (similar in shape to a hook).

[0031] Preferably, the handle 3 is slidably sleeved on the outside of the valve stem 2, and the outer side surface of the mounting seat 4 is provided with an arc-shaped groove 9 along the circumference of the valve stem 2 within a certain angle range (depending on the angle of rotation of the handle 3 during the process of switching the valve from a closed state to a fully open state), and the first card groove 7 and the second card groove 8 are respectively arranged at the two ends of the top surface of the arc-shaped groove 9.

[0032] The utility model arranges the handle 3 on the outside of the valve stem 2 in a sliding sleeve. When the valve needs to be switched from a closed state to an open state, the handle 3 can be pressed downward first to disengage the block 6 from the first slot 7, and the handle 3 can be rotated at the same time to move the block 6 along the arc groove 9 until the valve is in a fully open state. At this time, the block 6 just moves to the second slot 8, and then the handle 3 can be lifted upward to embed the block 6 in the second slot 8, so as to prevent the handle 3 from rotating and causing the valve to be accidentally closed. When the valve needs to be switched from a fully open state to a closed state, the handle 3 can be pressed downward first to disengage the block 6 from the second slot 8, and at the same time, the handle 3 can be rotated to move the block 6 along the arc groove 9 until the valve is in a closed state. At this time, the block 6 just moves to the first slot 7, and then the handle 3 can be lifted upward to embed the block 6 in the first slot 7, so as to prevent the handle 3 from rotating and causing the valve to be accidentally opened.

[0033] Furthermore, the radial cross-section of the sliding fitting part of the valve stem 2 and the handle 3 is non-circular. 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.

[0034] Preferably, a compression spring 10 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 10 are respectively abutted against the handle 3 and the mounting seat 4. The compression spring 10 can provide an upward pre-tightening force to the handle 3, so that the block 6 is always abutted against the top surface of the arc groove 9 during the rotation of the valve, and when the valve is rotated to a closed or fully open state, the block 6 is automatically clamped into the first slot 7 or the second slot 8 under the action of the compression spring 10, and there is no need to manually lift the handle 3 upward, which makes the operation more convenient.

[0035] Furthermore, the limiting component is an adjusting nut 11, and the adjusting nut 11 is connected to the valve stem 2 through a threaded pair. The compression spring 10 is limited by the adjusting nut 11, so that the preload force of the compression spring 10 can be adjusted according to needs.

[0036] Furthermore, the top surface of the arc groove 9 is an inclined surface 12. By designing the top surface of the arc groove 9 as an inclined surface 12, the preload force of the compression spring 10 can be used to self-drive the movement of the block 6 in the arc groove 9, thereby facilitating operation.

[0037] During the specific implementation process, if the top surface of the arc-shaped groove 9 is inclined toward the rotation direction of opening the valve (that is, the height of the second groove 8 is lower than the height of the first groove 7), when the valve needs to be switched from a fully open state to a closed state, the handle 3 can be pressed downward to disengage the block 6 from the second groove 8, and the handle 3 can be rotated at the same time to make the block 6 abut against the top surface of the arc-shaped groove 9. At this time, the handle 3 can be released, and the elastic force of the compression spring 10 can drive the block 6 to move along the top inclined surface 12 of the arc-shaped groove 9 toward the first groove 7 (the elastic force direction applied by the compression spring 10 to the block 6 is vertically upward, and the vertical upward force is decomposed into a force parallel to the inclined surface 12 and a force perpendicular to the inclined surface 12. The force parallel to the inclined surface 12 can pull the block 6 to slide along the inclined surface 12 toward the first groove 7), thereby driving the handle 3 and the valve stem 2 to rotate, and driving the block 6 to automatically embed into the first groove 7 when the valve is closed.

[0038] If the top surface of the arc-shaped groove 9 is inclined toward the rotation direction of closing the valve (that is, the height of the first groove 7 is lower than the height of the second groove 8), when the valve needs to be switched from the closed state to the fully open state, the handle 3 can be pressed downward to disengage the block 6 from the first groove 7, and the handle 3 can be rotated at the same time to make the block 6 abut against the top surface of the arc-shaped groove 9. At this time, the handle 3 can be released, and the elastic force of the compression spring 10 can drive the block 6 to move along the top inclined surface 12 of the arc-shaped groove 9 toward the second groove 8 (the elastic force direction applied by the compression spring 10 to the block 6 is vertically upward, and the vertical upward force is decomposed into a force parallel to the inclined surface 12 and a force perpendicular to the inclined surface 12. The force parallel to the inclined surface 12 can pull the block 6 to slide along the inclined surface 12 toward the second groove 8), thereby driving the handle 3 and the valve stem 2 to rotate, and driving the block 6 to automatically embed into the second groove 8 when the valve is fully opened.

[0039] In some embodiments, if the outer side wall of the mounting seat 4 is only provided with the first slot 7, the inclined surface 12 can be set to be inclined toward the end away from the first slot 7 (that is, the height of the inclined surface 12 close to the first slot 7 is higher than the height of the end away from the first slot 7). In this case, when the valve needs to be opened, the handle 3 can be pressed downward to disengage the block 6 from the first slot 7, and the handle 3 can be rotated to move the block 6 along the arc groove 9 to the end away from the first slot 7. At this time, the valve is fully opened. At this time, if the handle 3 is released, the block 6 will automatically move along the arc groove 9 under the action of the compression spring 10. The top surface of the groove 9 moves in the direction close to the first slot 7, thereby driving the handle 3 and the valve stem 2 to rotate, and automatically embeds into the first slot 7 when the valve is closed, so there is no need to manually close the valve. This self-locking structure is suitable for normally closed valves. Normally closed valves are not often opened, and the duration of each opening is relatively short, so it is easy to forget to manually close the valve. By adopting this self-locking structure in the present embodiment, the valve can be automatically closed within a certain delay time (the delay time is related to the length of time the block 6 slides in the arc groove 9) after the valve is manually opened, thereby effectively solving the problem of forgetting to close the valve.

[0040] In some embodiments, if the outer wall of the mounting seat 4 is only provided with the second slot 8, the inclined surface 12 can be set to be inclined toward the end away from the second slot 8 (that is, the height of the inclined surface 12 close to the second slot 8 is higher than the height of the end away from the second slot 8). In this case, when the valve needs to be closed, the handle 3 can be pressed downward to disengage the block 6 from the second slot 8, and the handle 3 can be rotated at the same time to move the block 6 along the arc groove 9 to the end away from the second slot 8, and the valve is closed; at this time, if the handle 3 is released, the block 6 will automatically move along the arc groove under the action of the compression spring 10. The top surface of 9 moves in the direction close to the second slot 8, thereby driving the handle 3 and the valve stem 2 to rotate, and automatically embeds into the second slot 8 when the valve is fully opened, so there is no need to manually open the valve. This self-locking structure is suitable for normally open valves. Normally open valves are not often closed, and the duration of each closing is relatively short, so it is easy to forget to manually open the valve. By adopting this self-locking structure in the present embodiment, the valve can be automatically opened within a certain delay time (the delay time is related to the length of time the block 6 slides in the arc groove 9) after the valve is manually closed, thereby solving the problem of forgetting to close the valve.

[0041] Preferably, two of each of the connecting arm 5 , the clamping block 6 , the first clamping slot 7 , the second clamping slot 8 , and the arc-shaped groove 9 are provided, so that the structure is more stable.

[0042] In this embodiment, the height of the inclined surface 12 at one end of the second slot 8 is set to be lower than the height at one end of the first slot 7 as an example to illustrate the working principle of the valve as follows:

[0043] When the valve needs to be switched from the closed state to the fully open state, the handle 3 is first pressed downward (overcoming the elastic force of the compression spring 10) to disengage the block 6 from the first slot 7, and the handle 3 is rotated clockwise (while rotating the handle 3 clockwise, the handle 3 needs to be continuously pressed downward) to slide the block 6 along the top surface of the arc groove 9 (such as Figure 3 As shown), until the valve is fully opened, at which time the block 6 is automatically embedded in the second slot 8 under the action of the compression spring 10 (as shown in FIG. Figure 4 As shown), the valve is locked in the fully open state to prevent the valve from closing by mistake.

[0044] When the valve needs to be switched from a fully open state to a closed state, the handle 3 is first pressed downward (overcoming the elastic force of the compression spring 10) to disengage the block 6 from the second slot 8, and the handle 3 is rotated counterclockwise to move the block 6 to the top surface of the arc-shaped groove 9. Thereafter, the handle 3 can be released, and the block 6 will slide toward the first slot 7 along the inclined surface 12 at the top of the arc-shaped groove 9 under the action of the compression spring 10 (such as Figure 3 As shown), the handle 3 and the valve stem 2 are driven to rotate until the valve is closed, at which time the block 6 is automatically embedded in the first slot 7 under the action of the compression spring 10 (as shown in FIG. Figure 1As shown), the valve can be locked in the closed state to prevent the valve from opening by mistake.

[0045] 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 with a locking structure, 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 passes through a mounting seat (4) at the control end of the valve body (1); the handle (3) is sleeved on the outside of the valve stem (2) and is used to drive the valve stem (2) to rotate; characterized in that: The bottom surface of the handle (3) is provided with a connecting arm (5) in the vertical direction, and the bottom inner side surface of the connecting arm (5) is provided with a clamping block (6); the outer side surface of the mounting seat (4) is provided with a first clamping groove (7) and / or a second clamping groove (8) that cooperate with the clamping block (6), and the first clamping groove (7) and the second clamping groove (8) are configured as follows: When the handle (3) is rotated to a valve-closed state, the clamping block (6) is embedded in the first clamping groove (7) to block the handle (3) from rotating; When the handle (3) is rotated to a fully open valve state, the clamping block (6) is embedded in the second clamping groove (8) to block the handle (3) from rotating.

2. A valve with a locking structure as claimed in claim 1, characterized in that: The handle (3) is slidably sleeved outside the valve stem (2), and the outer side surface of the mounting seat (4) is provided with an arc-shaped groove (9) within a certain angle range along the circumference of the valve stem (2), and the first clamping groove (7) and the second clamping groove (8) are respectively arranged at the two ends of the top surface of the arc-shaped groove (9).

3. A valve with a locking structure as claimed in claim 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 valve with a locking structure as claimed in claim 2, characterized in that: The outer sleeve of the valve stem (2) is provided with a compression spring (10), the top of the valve stem (2) is provided with a limit assembly, and the two ends of the compression spring (10) are respectively in contact with the handle (3) and the mounting seat (4).

5. A valve with a locking structure as claimed in claim 4, characterized in that: The limiting component is an adjusting nut (11), and the adjusting nut (11) is connected to the valve stem (2) via a threaded pair.

6. A valve with a locking structure as claimed in claim 4, characterized in that: The top surface of the arc-shaped groove (9) is a slope (12).

7. A valve with a locking structure as claimed in claim 2, characterized in that: The connecting arm (5), the clamping block (6), the first clamping slot (7), the second clamping slot (8), and the arc-shaped groove (9) are each provided with two.

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