Ball valve handle limiting device

Abstract

The utility model relates to the technical field of devices for preventing accidental or unpermitted actions, in particular to a ball valve handle limiting device. The ball valve handle limiting device comprises a handle fixing part, the handle fixing part is fixed to a handle when used, the handle fixing part comprises a sliding sleeve used for being connected with the handle, and a jackscrew used for fixing the sliding sleeve relative to the handle is arranged on the sliding sleeve. The handle fixing part is connected with a limiting clamping base used for limiting the opening and closing state of a handle of the ball valve, and a clamping groove is formed in the limiting clamping base and used for being clamped on a pipeline when the handle is parallel to the pipeline so as to limit the handle and the pipeline to keep parallel. The limiting clamping base is provided with an abutting face used for abutting against the outer side of the pipeline when the handle is perpendicular to the pipeline so as to limit the handle to be perpendicular to the pipeline. According to the ball valve handle limiting device, the locking effect of the instrument air ball valve of the automatic control valve is improved, accidental closing or opening of the instrument air ball valve in the normal production process is avoided, and stable work of the valve is guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to the device technical field of preventing accidental or unauthorized actions, especially to a ball valve handle limiting device. BACKGROUND

[0002] Instrument air refers to compressed air used to provide power and gas for instrument devices such as pneumatic valves, flow meters, pressure gauges, thermometers, liquid level gauges, analyzers, etc. in industrial production, especially in automatic control systems. Ball valves have the characteristics of compact structure, flexible operation and reliable sealing, and can be easily installed and used in instrument piping systems, suitable for quickly cutting off and regulating fluid flow, meeting the high requirements of instrument air systems for gas quality and stability, and are therefore widely used in instrument air systems.

[0003] During normal production, the instrument air ball valve of the automatic control valve should be in a fully open state to ensure the instrument air pressure and achieve normal regulation and switching of the valve. If the instrument air ball valve is accidentally closed, it will cause the instrument air pressure to quickly return to zero, and the automatic control valve to return to the designed safe state, i.e. fully open or fully closed, resulting in a large fluctuation in device parameters, and even unplanned shutdown of equipment and devices. The reasons for the abnormal opening or closing of the common instrument air ball valve during use include unstable fluctuations in system pressure, interference or misoperation of control signals, improper installation, and lack of maintenance. Unstable fluctuations in system pressure can cause the ball valve to malfunction when the external pressure exceeds the bearing range of the ball valve, causing the ball valve to automatically close; interference or misoperation of control signals can cause the ball valve to abnormally open or close; the ball valve is not installed according to the specification during installation, such as incorrect installation position, fasteners not tightened, etc.; the ball valve has not been maintained for a long time, causing internal parts to wear and abnormally operate. The traditional solution is to use "iron wire binding" to bind the instrument air ball valve handle and the instrument air pipeline to limit the movement of the instrument air ball valve handle.

[0004] A kind of instrument air ball valve safety lock is disclosed in Chinese utility model patent with authorization announcement number CN206555546U and authorization announcement date October 13, 2017. The instrument air ball valve safety lock includes a circular fixing part, a lock rod and a handle fixing part, the circular fixing part is sleeved on the instrument air main pipeline, one end of the lock rod is connected with the circular fixing part, the lock rod is arranged parallel to the instrument air main pipeline, the other end of the lock rod is arranged perpendicularly to the lock rod and has the handle fixing part, the handle fixing part is provided with a lock hole, the lock hole is used to pass through the instrument air ball valve handle to limit the rotation of the instrument air ball valve handle, the shape of the cross section of the lock hole matches the shape of the cross section of the handle. The instrument air ball valve safety lock can fix the position of the instrument air ball valve handle, but the instrument air ball valve safety lock can only fix the instrument air ball valve handle in a position parallel to the instrument air main pipeline, and cannot limit the case where the instrument air ball valve handle is perpendicular to the instrument air main pipeline, so the instrument air ball valve safety lock has certain limitations. Utility model content

[0005] The utility model discloses a ball valve handle limiting device, to solve the ball valve handle limiting device of current only can limit ball valve handle and pipeline keep parallel state, can not limit the handle of ball valve and pipeline keep vertical state's problem.

[0006] In order to solve the above problem, the ball valve handle limiting device of the utility model adopts the following technical scheme:

[0007] A ball valve handle limiting device includes handle fixed part, handle fixed part is fixed with handle when using, handle fixed part includes the sliding sleeve for being connected with handle, and the top screw for fixing sliding sleeve relative to handle is arranged on sliding sleeve, handle fixed part is connected with the limiting card seat for limiting the opening and closing state of the handle of ball valve, the limiting card seat is equipped with the card slot for being clamped on pipeline to limit handle and pipeline keep parallel state when handle and pipeline are parallel, and the limiting card seat is equipped with the abutting surface for abutting on the outside of pipeline to limit handle and pipeline keep vertical state when handle and pipeline are vertical.

[0008] Further, the top screw is arranged at the top of the handle fixed part so as to be disassembled.

[0009] Further, the top screw is butterfly bolt.

[0010] Further, the limiting card seat protrudes relative to the side close to the valve when using.

[0011] Further, the card slot of the limiting card seat opens downward.

[0012] Further, the limiting card seat is semicylindrical.

[0013] Further, the handle fixed part and the limiting card seat are connected through the connecting plate to adapt to the distance between handle and pipeline.

[0014] Further, the handle fixed part, the connecting plate and the limiting card seat are integrally formed.

[0015] Further, the cross section of sliding sleeve is rectangular.

[0016] Further, the shape of the cross section of sliding sleeve is adapted to the shape of the cross section of handle.

[0017] Beneficial effects: the ball valve handle limiting device is an improved invention. Through the scheme, the limiting clamp base is arranged, the limiting clamp base can be clamped on the pipeline when the ball valve handle is parallel to the pipeline where the ball valve is located, the limiting clamp base can abut against the sidewall of the pipeline when the ball valve handle is perpendicular to the pipeline where the ball valve is located, the ball valve handle can be kept at the predetermined position when being opened or closed; the handle fixing part provides a stable connecting point, the limiting clamp base is firmly connected with the ball valve handle through the cooperation of the sliding sleeve and the jackscrew. The ball valve handle limiting device improves the locking effect of the self-control valve instrument air ball valve, avoids accidental closing or opening of the instrument air ball valve in the normal production process, and ensures stable work of the valve. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is an embodiment of the ball valve handle limiting device of the utility model, and is a use state schematic view of the ball valve handle limiting device of the utility model;

[0019] Figure 2 is an embodiment of the ball valve handle limiting device of the utility model, and is another use state schematic view of the ball valve handle limiting device of the utility model;

[0020] Figure 3 is a top view of the limiting clamp base of the ball valve handle limiting device of the utility model.

[0021] In the figure: 1, handle fixing part; 2, limiting clamp base; 3, sliding sleeve; 4, jackscrew; 5, threaded hole; 6, connecting plate. DETAILED DESCRIPTION

[0022] The features and performances of the utility model are further described in detail in combination with embodiments.

[0023] The ball valve handle limiting device of the utility model is provided with the limiting clamp base which is clamped on the pipeline or abuts against the sidewall of the pipeline to ensure that the ball valve handle can be kept at the predetermined position when being opened or closed, and the handle fixing part is arranged to provide a stable connecting point, and the limiting device is firmly connected with the ball valve handle.

[0024] As a basic scheme, the ball valve handle limiting device of the utility model is as shown in Figure 1 and Figure 2 . The ball valve handle limiting device of the utility model mainly comprises a handle fixing part 1 and a limiting clamp base 2, the handle fixing part 1 is used for fixedly connecting with the handle of the ball valve, and the limiting clamp base 2 is used for limiting the opening and closing state of the handle, so as to ensure that the ball valve can be accurately opened or closed when needed. The handle fixing part 1 comprises a sliding sleeve 3 used for connecting with the handle, the sliding sleeve 3 enables the handle fixing part 1 to be tightly sleeved on the handle of the ball valve, and the handle fixing part 1 is fixedly connected with the handle in a certain mode (such as a bolt, a nut or the like), the handle fixing part 1 provides a stable connecting point, and the limiting device is firmly fixed with the ball valve handle, so as to facilitate subsequent limiting operation.

[0025] The top screw 4 is arranged on the sliding sleeve 3 to fix the sliding sleeve 3 relative to the handle, which can ensure the firm and reliable connection between the handle fixing part 1 and the handle, avoid the falling caused by vibration, impact or external force interference during use, and thus improve the stability and safety of the entire limiting device. The tight connection between the handle fixing part 1 and the handle is achieved by rotating the top screw 4, which is not only simple in structure but also convenient to operate. The operator only needs to rotate the top screw 4 to easily realize the connection and locking between the handle fixing part 1 and the handle. This design reduces the operation difficulty and improves the work efficiency. When the top screw 4 fails or wears out, the operator can easily disassemble and maintain or replace it, which reduces the maintenance cost and prolongs the service life of the limiting device.

[0026] The limiting seat 2 can contact the ball valve body or the pipeline wall to limit the rotation range of the handle. The main function of the limiting seat 2 is to ensure that the ball valve handle can stay at a predetermined position when opening or closing. When the handle is parallel to the pipeline, the limiting seat 2 is clamped on the pipeline to limit the handle to keep parallel to the pipeline; when the handle is perpendicular to the pipeline, the limiting seat 2 is clamped on the outside of the pipeline, the handle drives the limiting seat 2 to rotate, the limiting seat 2 contacts the pipeline wall or the ball valve body, and abuts against the outside of the pipeline wall or the ball valve body to prevent the handle from continuing to rotate, thereby limiting the handle to keep perpendicular to the pipeline. In this way, it can be ensured that the ball valve can be accurately opened or closed when needed, avoiding safety accidents caused by excessive opening or closing.

[0027] As a preferred embodiment, the top screw 4 is arranged at the top of the handle fixing part 1 for disassembly and assembly. The top screw 4 is arranged on the top of the handle fixing part 1, and the threaded hole 5 matched with the top screw 4 is arranged on the top wall of the handle fixing part 1, so that the top screw 4 can be easily screwed into the threaded hole 5 from above, thereby realizing the connection and locking between the handle fixing part 1 and the handle. At the same time, this design also facilitates the operator to disassemble the top screw 4 when needed for maintenance or replacement. The operator only needs to screw in or out the top screw 4 from above, without the need for complex operation or adjustment. The easy-to-install and disassemble design reduces the installation and disassembly time of the handle fixing part 1, thereby improving the work efficiency. In addition, arranging the top screw 4 at the top can also make full use of the space layout of the ball valve system, reduce the interference with other components, and help to keep the ball valve system clean and orderly.

[0028] As a preferred embodiment, the top screw 4 is a butterfly bolt. The butterfly bolt is characterized by its head designed as a flat and wide butterfly structure. The flat and wide head design of the butterfly bolt allows the operator to rotate it directly by hand without the need for tools such as wrenches or screwdrivers, simplifying the installation and removal process and improving work efficiency. Compared with bolts that require the use of professional tools, the butterfly bolt does not require additional tool costs, thereby reducing the production and use costs of the entire limiting device. The butterfly bolt has a simple structure and strong versatility, and can be applied to handle fixing parts 1 and handles of different specifications and models. This adaptability enables the limiting device to be widely used in various ball valve systems. The design of using a butterfly bolt as a locking device in the ball valve handle limiting device has the beneficial effects of simplifying the operation, facilitating carrying and storage, enhancing user experience, reducing costs, and strong adaptability, which collectively improve the practicality and convenience of the limiting device, providing strong support for the precise control and safe operation of the ball valve system. At the same time, this design also reflects the concern for user-friendliness and cost-effectiveness, which helps to improve the overall performance and user satisfaction of the ball valve system.

[0029] As a preferred embodiment, the limiting seat 2 protrudes towards the side close to the valve relative to the handle sleeve. The protrusion of the limiting seat 2 towards the side close to the valve can make it closely fit on the pipe outer wall or valve side wall, thereby increasing the stability of the entire limiting device and helping to prevent the handle from moving accidentally due to vibration or external force during operation. The protruding part serves as a limiting point to ensure that the handle can accurately stay at the predetermined position when opening or closing. When the handle is rotating, the protruding part of the limiting seat 2 will resist the pipe outer wall or valve side wall, generating resistance and preventing the handle from continuing to rotate.

[0030] As a preferred embodiment, as shown in Figures 1-3 the limiting seat 2 is a downward-opening clamping groove. The downward-opening clamping groove design allows the limiting seat 2 to be easily inserted and fixed from above the pipe without complex operations or tools, simplifying the installation and removal process and improving work efficiency. The pipe is firmly clamped in the clamping groove, improving the stability of the device during use. The downward-opening clamping groove design also allows the limiting seat 2 to adapt to pipes of different sizes within a certain range, increasing the versatility and flexibility of the limiting device, so that the same model of limiting device can be used in various ball valve systems. Since the limiting seat 2 is designed simply, during routine maintenance or troubleshooting, the operator can easily check and clean the limiting seat 2, reducing maintenance difficulty and cost.

[0031] As a preferred embodiment, the limiting seat 2 is a semi-cylindrical body. In the ball valve handle limiting device, the limiting seat 2 is designed in the shape of a semi-cylindrical body, which not only has the function of an open downward clamping groove, but also improves the appearance of the limiting seat 2. The semi-cylindrical design makes the limiting seat 2 more visually smooth and harmonious, which helps to improve the overall aesthetics of the ball valve system and make it more in line with the aesthetic standards of modern industrial design. The semi-cylindrical shape of the limiting seat 2 can coordinate with the overall style of the ball valve system after installation, improving the overall aesthetics. The semi-cylindrical shape not only provides sufficient support force, but also disperses stress, reducing wear and deformation caused by long-term use or environmental factors, which helps to prolong the service life of the limiting seat 2 and maintain its good working condition. The semi-cylindrical design of the limiting seat 2 allows it to be more flexible in adapting to different space layouts during installation, reducing interference with other equipment or pipelines, and maintaining the neatness and orderliness of the ball valve system.

[0032] As a preferred embodiment, the handle fixing part 1 and the limiting seat 2 are connected by a connecting plate 6 to adapt to the distance between the ball valve and the pipeline. The connecting plate 6 usually has a certain length and adjustability, increasing the versatility and flexibility of the device to adjust according to actual needs. By connecting through the connecting plate 6, users can easily adjust the relative position between the handle fixing part 1 and the limiting seat 2 according to actual installation needs, simplifying the installation process and improving work efficiency. The connecting plate 6 not only serves as a connection, but also increases the stability of the limiting device to some extent, ensuring that the handle fixing part 1 and the limiting seat 2 remain stable after installation and are not prone to loosening.

[0033] As a preferred embodiment, the handle fixing part 1, the connecting plate 6 and the limiting seat 2 are integrally formed. Integrally formed design has the characteristics of enhancing structural strength, improving precision, simplifying manufacturing process, improving appearance and enhancing durability, etc., which improves the overall performance and reliability of the limiting device and provides a strong guarantee for the precise control and safe operation of the ball valve system. The design of integrally forming eliminates the joints between the parts, thereby reducing potential weaknesses and making the limiting device more solid and durable, capable of withstanding greater stress and load. The integrally forming process can ensure the precise alignment between the handle fixing part 1, the connecting plate 6 and the limiting seat 2, which helps to ensure that the limiting device can function correctly after installation and reduce performance degradation or failure caused by misalignment of parts. Compared with separate parts, the design of integrally forming reduces the assembly steps in the manufacturing process, reduces production costs, shortens production cycle and improves production efficiency.

[0034] As a preferred embodiment, the cross section of the sliding sleeve 3 is rectangular. The rectangular cross section shape provides the sliding sleeve 3 with a larger contact area, a more stable connection with the handle fixing part 1, and reduces the risk of loosening or displacement of the sliding sleeve 3 during operation due to vibration or external force. The rectangular shape also plays a certain guiding role. When the sliding sleeve 3 is sleeved on the handle, its rectangular cross section can ensure that the sliding sleeve 3 can only move or rotate in a specific direction, keeping the handle on a predetermined motion trajectory. The rectangular cross section of the sliding sleeve 3 has stronger torsional resistance than a circular or other shape. When subjected to torsional force, the rectangular sliding sleeve 3 can better resist deformation, thereby maintaining stable connection with the handle and the limiting seat 2.

[0035] As a preferred embodiment, the cross section of the sliding sleeve 3 is rectangular. The rectangular cross section shape provides the sliding sleeve 3 with a larger contact area, a more stable connection with the handle fixing part 1, and reduces the risk of loosening or displacement of the sliding sleeve 3 during operation due to vibration or external force. The rectangular shape also plays a certain guiding role. When the sliding sleeve 3 is sleeved on the handle, its rectangular cross section can ensure that the sliding sleeve 3 can only move or rotate in a specific direction, keeping the handle on a predetermined motion trajectory. The rectangular cross section of the sliding sleeve 3 has stronger torsional resistance than a circular or other shape. When subjected to torsional force, the rectangular sliding sleeve 3 can better resist deformation, thereby maintaining stable connection with the handle and the limiting seat 2.

[0036] The specific implementation process of the embodiment is as follows: when the ball valve needs to be locked, the operator first installs the handle fixing part 1 of the fixing device at a suitable position of the handle, and then locks it with the jackscrew 4 to realize the "locking" of the ball valve. When the ball valve needs to be unlocked, the operator loosens the jackscrew 4 and moves it on the handle to realize the "unlocking" of the ball valve. When the handle is parallel to the pipeline, the limiting seat 2 is clamped on the pipeline to limit the handle and the pipeline to remain in a parallel state; when the handle is perpendicular to the pipeline, the limiting seat 2 is pressed against the outside of the pipeline, and the limiting seat 2 contacts the pipe wall or the ball valve body, thereby preventing the handle from continuing to rotate and limiting the handle and the pipeline to remain in a perpendicular state.

[0037] As shown in Figure 1 and Figure 2 , the gray part in the figure is the ball valve body limited by the ball valve handle limiting device of the embodiment and the pipeline where the ball valve is located. When the handle is parallel to the pipeline, the limiting seat 2 is clamped on the pipeline to limit the handle and the pipeline to remain in a parallel state; when the handle is perpendicular to the pipeline, the limiting seat 2 is pressed against the outside of the pipeline, and the limiting seat 2 contacts the pipe wall or the ball valve body, and is pressed against the outside of the pipe wall or the ball valve body to prevent the handle from continuing to rotate, thereby limiting the handle and the pipeline to remain in a perpendicular state.

[0038] The above is only a preferred embodiment of the present application and does not limit the present application. The patent protection scope of the present application is subject to the claims, and any equivalent structural changes made in accordance with the contents of the specification and drawings of the present application should also be included within the protection scope of the present application.

Claims

1. A ball valve handle position limiting device comprising a handle fixing portion which is fixed with a handle in use, characterized in that, The handle fixing part comprises a sliding sleeve for connecting with the handle, a top screw is arranged on the sliding sleeve for fixing the sliding sleeve relative to the handle; the handle fixing part is connected with a limiting holder for limiting the opening and closing state of the handle of the ball valve, the limiting holder is provided with a clamping groove for clamping on the pipeline when the handle is parallel to the pipeline to limit the handle and the pipeline to keep parallel state, the limiting holder is provided with a top surface for abutting on the outside of the pipeline when the handle is perpendicular to the pipeline to limit the handle and the pipeline to keep perpendicular state.

2. The ball valve handle stop of claim 1, wherein, The top screw is arranged on the top of the handle fixing part for disassembly and assembly.

3. The ball valve handle stop of claim 2, wherein, The top screw is a butterfly bolt.

4. The ball valve handle stop of claim 1, wherein, The limiting holder protrudes towards the side close to the valve relative to the handle sleeve in use.

5. The ball valve handle stop of claim 1, wherein, The clamping groove of the limiting holder opens downward.

6. The ball valve handle stop of claim 5, wherein, The limiting holder is a semi-cylindrical body.

7. The ball valve handle stop of claim 1, wherein, The handle fixing part and the limiting holder are connected through a connecting plate to adapt to the distance between the handle and the pipeline.

8. The ball valve handle stop of claim 7, wherein, The handle fixing part, the connecting plate and the limiting holder are integrally formed.

9. The ball valve handle stop of claim 1, wherein, The cross section of the sliding sleeve is rectangular.

10. The ball valve handle stop of claim 9, wherein, The shape of the cross section of the sliding sleeve is adapted to the shape of the cross section of the handle.

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