Anti-release hand pull valve with overload protection function
By introducing a protective cylinder and an operating piston structure into the hand-operated valve, combined with a flow-limiting orifice and a press-to-vent switch, the safety hazards of traditional hand-operated valves when the pulling force exceeds the limit are solved, achieving automatic locking and overload protection, and improving operational safety and stability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-14
- Publication Date
- 2026-03-24
AI Technical Summary
Traditional hand-operated valves rely on manual operation for reset and cannot automatically lock when the pulling force exceeds the limit. This can lead to damage to the valve core due to excessive pulling force, posing a safety hazard. Furthermore, if the handle is released, it may cause a sudden increase in air pressure, leading to pipe rupture or mechanical loss of control, or even personal injury or death.
It adopts a protective cylinder and operating piston structure, controls the movement of the handle through air pressure difference, and is equipped with a flow limiting orifice and a press-to-vent switch to provide overload protection, prevent the handle from slipping out of the hand and abnormal displacement of the valve core, and achieve automatic locking.
It improves the safety and ease of operation of the hand-operated valve, prevents damage to the valve core, avoids air pressure fluctuations, and ensures operational stability and safety.
Smart Images
Figure CN224033211U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to hand pull valve technical field, concretely relates to a prevent hand pull valve of overloading protection. BACKGROUND
[0002] Hand pull valve is widely used in industrial pneumatic equipment, and its core function is to control the on-off of air path through handle pulling force. The hand pull valve relies on single spring or mechanical lever to realize reset, and lacks effective protection for abnormal pulling force. In the conventional operation, the handle needs to be reset manually, and if the operator accidentally releases the handle or the external force suddenly increases (such as equipment vibration, pipeline impact), the handle is easy to be released or the valve core is abnormally displaced.
[0003] The reset of the traditional hand pull valve relies on manual operation, and cannot be automatically locked when the pulling force exceeds the limit, which causes the pulling force exceeding the limit to damage the valve core and has safety hazards. In addition, in industrial equipment, the release of the handle can cause the sudden increase of the air path pressure, causing pipe explosion or mechanical out of control, and in serious cases, even causing personnel injury. Therefore, we propose a prevent hand pull valve with overload protection. SUMMARY
[0004] The utility model discloses a prevent hand pull valve with overload protection, which solves the problem of the reset of the traditional hand pull valve relying on manual operation, and cannot be automatically locked when the pulling force exceeds the limit, which causes the pulling force exceeding the limit to damage the valve core and has safety hazards. In addition, in industrial equipment, the release of the handle can cause the sudden increase of the air path pressure, causing pipe explosion or mechanical out of control, and in serious cases, even causing personnel injury.
[0005] The utility model discloses a prevent hand pull valve with overload protection, which solves the problem of the reset of the traditional hand pull valve relying on manual operation, and cannot be automatically locked when the pulling force exceeds the limit, which causes the pulling force exceeding the limit to damage the valve core and has safety hazards. In addition, in industrial equipment, the release of the handle can cause the sudden increase of the air path pressure, causing pipe explosion or mechanical out of control, and in serious cases, even causing personnel injury.
[0006] A prevent hand pull valve with overload protection, including hand pull valve main part, one side of hand pull valve main part is provided with operation handle, the upper and lower of hand pull valve main part are close to rear side fixedly connected with protection gas cylinder, and the center of protection gas cylinder is provided with cylindrical cavity, the operation piston and drive piston are movably connected in the cylindrical cavity of protection gas cylinder, the operation piston is fixedly connected with operation push rod near one side of protection gas cylinder, operation push rod passes through protection gas cylinder setting, and the outer end of both sides operation push rod is fixedly connected with handle clamp sleeve, handle clamp sleeve is sleeved and fixed on the handle of operation handle, the drive push rod is fixedly connected with drive push rod away from one side of protection gas cylinder, drive push rod is outwardly arranged through protection gas cylinder, and the outer end of both sides drive push rod is fixedly connected with drive knob.
[0007] Further, the outer wall of the operation push rod is provided with a flow limiting hole near the handle clamp sleeve side and the operation piston side.
[0008] Further, the driving push rod is provided with a communication hole on the outer wall close to the driving piston, and the center of the driving handle is provided with a press air switch, which is communicated with the inner cavities of the two driving push rods and the external air.
[0009] Further, the press air switch comprises a communication valve seat, which is embedded in the inner center of the driving handle, and the two sides of the communication valve seat are provided with push rod connecting holes, which are communicated with the inner cavities of the two driving push rods, and the inner side of the communication valve seat is movably inserted with a switching valve core, and the switching valve core and the bottom of the communication valve seat are provided with a valve core spring, the inside of the switching valve core is symmetrically provided with a valve core communication air duct, and the valve core communication air duct is communicated with the side wall of the switching valve core and the side wall of the communication valve seat.
[0010] Further, the operation piston and the driving piston are provided with a force assisting spring.
[0011] Further, the outer walls of the operation piston and the driving piston are provided with multiple sliding sealing rings, and the sliding sealing seats are arranged at the two ends of the protection cylinder corresponding to the operation push rod and the driving push rod.
[0012] Further, the outer wall of the operation push rod is fixedly provided with an outward limiting ring by interference fit outside the inner cavity of the protection cylinder, and the outer wall of the operation push rod is fixedly provided with a pushing limiting ring by interference fit outside the protection cylinder.
[0013] The beneficial effects of the utility model are as follows:
[0014] 1, the utility model discloses a protection cylinder, which can be directly installed on the outer side of the finished product hand valve main body, is convenient for on -demand selection and matching, and reduces production cost, the protection cylinder is divided into three cavities by the operation piston and the driving piston, the driving handle drives the operation piston to move in the inner cavity of the protection cylinder, so that the air pressure between the operation piston and the driving piston is changed, the operation piston is pushed to move by the air pressure difference between the operation piston and the driving piston and the outer side of the operation piston, so as to indirectly push the operation handle, control operation handle pulls out and pushes in, and the operation handle is provided with overload protection through the buffer of air pressure, when the operation handle moves to the end of stroke, prevents the valve core from being damaged due to overrunning of pulling force. The safety hidden danger of the traditional hand valve is solved, and the operation convenience and use efficiency are improved, so that the utility model has wide application prospect.
[0015] 2, the utility model discloses a flow limiting hole, and the flow limiting hole can limit the discharge and suction speed of the gas outside the operation piston of the protection cylinder, so as to control the moving speed of the operation piston, so that when the operation handle is subjected to too large pulling force, the moving speed of the operation piston is limited, the operation handle is prevented from suddenly slipping or the valve core is prevented from abnormally displacing, and the operation safety is improved.
[0016] 3、The utility model discloses a press air switch structure is set, when the press air switch is not pressed, the valve core keeps the state of moving out under the action of valve core spring, the valve core communication air passage of switching valve core is staggered with the push rod connecting hole of communication valve seat at this moment, makes the protection cylinder corresponding drive piston outer side inner chamber airtight, drive piston and drive push rod's position are stable at this moment, drive the position of holding handle is fixed, and operating handle is stably clamped, effectively prevent operating handle from falling off, avoid the pressure fluctuation caused by operating handle accidental movement, thereby effectively improve the security and stability of hand valve. BRIEF DESCRIPTION OF DRAWINGS
[0017] Figure 1 is the perspective view of the utility model;
[0018] Figure 2 is the front sectional view of the utility model;
[0019] Figure 3 is the utility model Figure 2 A place of the enlarged view in the utility model;
[0020] Figure 4 is the internal structure diagram of the press air switch of the utility model.
[0021] Significant: 1, hand valve main part;2, protection cylinder;3, operation push rod;4, operation piston;5, restrictor;6, power spring;7, drive piston;8, drive push rod;9, communication hole;10, drive holding handle;11, press air switch;12, move out limit ring;13, push in limit ring;14, handle clamp sleeve;15, communication valve seat;16, switching valve core;17, valve core spring;18, valve core communication air passage;19, push rod connecting hole;20, operating handle. DETAILED DESCRIPTION
[0022] In order to make the utility model embodiment's purpose, technical scheme and advantage more clear, below, will combine the drawings in the utility model embodiment, the technical scheme in the utility model embodiment is clearly, completely described.
[0023] Please refer to Figures 1-4The utility model provides a kind of anti-hand pull valve of overloading protection, including hand valve main body 1, the side of hand valve main body 1 is provided with operating handle 20, and the upper and lower of hand valve main body 1 are close to rear side fixedly connected with protection cylinder 2, and the center of protection cylinder 2 is provided with cylindrical cavity, and operating piston 4 and drive piston 7 are movably connected in the cylindrical cavity of protection cylinder 2, operating piston 4 is fixedly connected with operating push rod 3 close to one side of protection cylinder 2, operating push rod 3 is set through protection cylinder 2, and the outer end of both sides operating push rod 3 is fixedly connected with handle clamp sleeve 14, handle clamp sleeve 14 is sleeved and fixed on the handle of operating handle 20, drive piston 7 is fixedly connected with drive push rod 8 away from one side of protection cylinder 2, drive push rod 8 is set towards outside through protection cylinder 2, and the outer end of both sides drive push rod 8 is fixedly connected with drive grip 10.
[0024] In the embodiment, preferably, the outer wall of the operating push rod 3 is provided with a flow limiting hole 5 close to the handle clamp sleeve 14 side and close to the operating piston 4 side; the flow limiting hole 5 can limit the discharge and suction speed of the gas outside the operating piston 4 corresponding to the protection cylinder 2, so as to control the moving speed of the operating piston 4, so that when the operating handle 20 is subjected to excessive pulling force, the moving speed of the operating piston 4 is limited, the operating handle 20 is prevented from being suddenly released or the valve core is prevented from being abnormally displaced, and the operation safety is improved.
[0025] In the embodiment, preferably, the outer wall of the operating push rod 3 is provided with a flow limiting hole 5 close to the handle clamp sleeve 14 side and close to the operating piston 4 side; the flow limiting hole 5 can limit the discharge and suction speed of the gas outside the operating piston 4 corresponding to the protection cylinder 2, so as to control the moving speed of the operating piston 4, so that when the operating handle 20 is subjected to excessive pulling force, the moving speed of the operating piston 4 is limited, the operating handle 20 is prevented from being suddenly released or the valve core is prevented from being abnormally displaced, and the operation safety is improved.
[0026] In this embodiment, preferably, the pressing ventilation switch 11 comprises a communication valve seat 15, which is embedded in the inside center of the driving handle 10, and two push rod connecting holes 19 are arranged on the two sides of the communication valve seat 15, and the two push rod connecting holes 19 are communicated with the inner cavities of the two driving push rods 8, and a switching valve core 16 is movably inserted into the inside of the communication valve seat 15, and a valve core spring 17 is arranged between the switching valve core 16 and the bottom of the communication valve seat 15, and a valve core communication air channel 18 is symmetrically arranged in the inside of the switching valve core 16, and the valve core communication air channel 18 is communicated with the side wall of the switching valve core 16 and the side wall of the communication valve seat 15. Through the structure of the pressing ventilation switch 11 arranged, when the pressing ventilation switch 11 is not pressed, the switching valve core 16 keeps the state of moving out under the action of the valve core spring 17, at this time, the valve core communication air channel 18 of the switching valve core 16 is staggered with the push rod connecting hole 19 of the communication valve seat 15, so that the inside cavity of the driving piston 7 corresponding to the outside of the protection gas cylinder 2 is closed, at this time, the positions of the driving piston 7 and the driving push rod 8 are stable, the position of the driving handle 10 is fixed, the operating handle 20 is stably clamped, the safety and stability of the hand-operated valve are effectively improved.
[0027] In this embodiment, preferably, a power assisting spring 6 is arranged between the operating piston 4 and the driving piston 7. The power assisting spring 6 arranged provides a constant thrust between the operating piston 4 and the driving piston 7, so that the operating handle 20 is more labor-saving when reset, and the response speed is improved, and the operation convenience is improved.
[0028] In this embodiment, preferably, a plurality of sliding sealing rings are arranged on the outer walls of the operating piston 4 and the driving piston 7, and sliding sealing seats are arranged at the two ends of the protection gas cylinder 2 corresponding to the operating push rod 3 and the driving push rod 8. Through the sliding sealing rings and the sliding sealing seats arranged, the stable sliding of the operating piston 4 and the driving piston 7 in the inner cavity of the protection gas cylinder 2 can be ensured, at the same time, the gas leakage is prevented, the airtightness of the gas pressure system is maintained, and the working stability and safety of the hand-operated valve are further improved.
[0029] In the embodiment, preferably, the outer wall of the operating push rod 3 is fixed with an outward movement limiting ring 12 in interference fit on the outside of the inner cavity of the protection cylinder 2, and the outer wall of the operating push rod 3 is fixed with a pushing limiting ring 13 in interference fit on the outside of the protection cylinder 2. Through the outward movement limiting ring 12 and the pushing limiting ring 13, the maximum movement distance of the operating push rod 3 during operation can be limited, so as to prevent the operating piston 4 and the driving piston 7 from colliding with the end of the protection cylinder 2 and causing damage, and at the same time, ensure that the operating handle 20 can be stably stayed at the preset position under the action of pulling force and pushing force, thereby improving the operation accuracy and durability of the hand-operated valve.
[0030] The working principle and use process of the utility model are as follows: when the device is used, the protection cylinder 2 is directly installed on the outside of the finished hand-operated valve body 1, so that the protection cylinder 2 can be conveniently selected and matched as needed, and the production cost is reduced; the protection cylinder 2 is divided into three cavities by the operating piston 4 and the driving piston 7; the driving handle 10 drives the driving piston 7 to move in the inner cavity of the protection cylinder 2, so as to change the air pressure between the operating piston 4 and the driving piston 7; the operating piston 4 is driven to move by the air pressure difference between the operating piston 4 and the driving piston 7 and the air pressure on the outside of the operating piston 4, so as to indirectly drive the operating handle 20 to be pulled out and pushed in; the air pressure provides overload protection for the operating handle 20, and prevents the valve core from being damaged due to over-limit pulling force when the operating handle 20 moves to the end of the stroke. The safety hazards existing in the traditional hand-operated valve are solved, and the operation convenience and use efficiency are improved, so that the utility model has a wide application prospect.
[0031] The above description of the disclosed embodiments enables a person skilled in the art to implement or use the utility model. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the utility model. Therefore, the utility model will not be limited to these embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.
Claims
1. A pull valve with overload protection and anti-disengagement function, comprising a pull valve body (1), wherein an operating handle (20) is provided on one side of the pull valve body (1), characterized in that: The hand-operated valve body (1) is fixedly connected to a protective cylinder (2) near the rear side. A cylindrical cavity is provided in the center of the protective cylinder (2). An operating piston (4) and a driving piston (7) are movably connected in the cylindrical cavity of the protective cylinder (2). An operating push rod (3) is fixedly connected to the side of the operating piston (4) near the protective cylinder (2). The operating push rod (3) passes through the protective cylinder (2). A handle clip (14) is fixedly connected to the outer end of the two operating push rods (3). The handle clip (14) is sleeved and fixed on the handle of the operating handle (20). A driving push rod (8) is fixedly connected to the side of the driving piston (7) away from the protective cylinder (2). The driving push rod (8) passes through the protective cylinder (2) outward. A driving grip (10) is fixedly connected to the outer end of the two driving push rods (8).
2. The anti-disengagement hand-operated valve with overload protection according to claim 1, characterized in that: The outer wall of the operating push rod (3) is provided with flow-limiting holes (5) on the side near the handle sleeve (14) and the side near the operating piston (4).
3. The anti-disengagement hand-operated valve with overload protection according to claim 1, characterized in that: The drive push rod (8) has a connecting hole (9) on the outer wall near the drive piston (7), and the center of the drive handle (10) is provided with a press-to-vent switch (11), which connects the inner cavity of the two drive push rods (8) with the outside air.
4. The anti-disengagement hand-operated valve with overload protection according to claim 3, characterized in that: The press-to-open switch (11) includes a connecting valve seat (15), which is embedded in the inner center of the drive grip (10). Push rod connecting holes (19) are provided on both sides of the connecting valve seat (15). The push rod connecting holes (19) on both sides are connected to the inner cavity of the drive push rods (8) on both sides. A switching valve core (16) is movably inserted into the inner side of the connecting valve seat (15). A valve core spring (17) is provided between the switching valve core (16) and the bottom of the connecting valve seat (15). A valve core connecting air passage (18) is symmetrically opened inside the switching valve core (16), and the valve core connecting air passage (18) connects the side wall of the switching valve core (16) and the side wall of the connecting valve seat (15).
5. The anti-disengagement hand-operated valve with overload protection according to claim 1, characterized in that: An assist spring (6) is provided between the operating piston (4) and the driving piston (7).
6. The anti-disengagement hand-operated valve with overload protection according to claim 1, characterized in that: The outer walls of the operating piston (4) and the driving piston (7) are provided with multiple sliding seal rings, and the two ends of the protective cylinder (2) are provided with sliding seal seats corresponding to the operating push rod (3) and the driving push rod (8).
7. The anti-disengagement hand-operated valve with overload protection according to claim 1, characterized in that: The outer wall of the operating push rod (3) is fitted with an outward displacement limiting ring (12) corresponding to the outer side of the inner cavity of the protective cylinder (2), and the outer wall of the operating push rod (3) is fitted with an inward pushing limiting ring (13) corresponding to the outer side of the protective cylinder (2).