Roller-type mechanical valve

Abstract

The utility model relates to a kind of mechanical valve of roller, by operating mechanism, the design of roller and button is combined, it can efficiently convert lateral driving force into the axial movement of valve core, this structure is not only labor-saving, sensitive, and especially applicable to space limited or complex mechanical interference exists in automated equipment, and the positioning mechanism of positioning ball, positioning spring and the positioning groove on valve core, can provide clear gear feeling when valve core switches to position, valve is provided with valve core reset spring inside, after the operating force of outside is cancelled, spring can automatically and quickly drive valve core from working position back to initial safe position, cut off working gas path and connect exhaust, to prevent equipment in abnormal keeping under pressure loss state, improve the safety of entire pneumatic system, realize the fail-safe function of valve.

Description

Technical Field

[0001] This utility model relates to the field of roller mechanical valve technology, and in particular to a roller mechanical valve. Background Technology

[0002] As a fundamental component in pneumatic control systems, the reliability, service life, and safety of mechanical valves are of paramount importance. Especially in applications where valve actuation requires lateral movement via a fixed stop or cam, traditional lever or pushrod operating mechanisms convert lateral force into sliding friction, resulting in high operating force, rapid wear, and short service life.

[0003] In addition, existing mechanical valves often have the following shortcomings: First, the valve core positioning mechanism is poorly designed and is prone to movement under equipment vibration, resulting in unstable working position. Second, they lack reliable self-resetting capability and cannot ensure that the valve automatically returns to a safe state after the drive is removed, posing a safety hazard. Third, if the sealing system is not designed properly, it is easy to cause internal or external leakage of the medium, affecting system performance. Finally, traditional pipeline connection methods are cumbersome to install and inefficient, and cannot meet the needs of modern pneumatic systems for rapid wiring and maintenance. Utility Model Content

[0004] In view of this, the purpose of this utility model is to provide a roller-type mechanical valve that is easy to operate, reliable in positioning, has fail-safe function, and has good sealing performance.

[0005] To achieve the above objectives, this utility model employs a roller-type mechanical valve, comprising a valve body with an inlet, an outlet, and an exhaust port. An externally driven operating mechanism is located on the top of the valve body. Inside the valve body is a valve seat and a valve core axially movable within the valve seat. The operating mechanism is kinetically connected to the valve core and drives the valve core to move axially within the valve seat, switching the connection state between the inlet, outlet, and exhaust port. A valve core return spring is fitted onto the valve core for resetting. A positioning mechanism is provided within the valve body, comprising a positioning ball and a positioning spring that applies a radial force to the positioning ball. A positioning groove is provided on the outer circumferential surface of the valve core to cooperate with the positioning ball.

[0006] The beneficial effects of the above structure are as follows: By adopting a design that combines rollers and buttons in the operating mechanism, the lateral driving force can be efficiently converted into the axial movement of the valve core. This structure is not only labor-saving and sensitive to operate, but also particularly suitable for automated equipment with limited space or complex mechanical interference. The positioning mechanism, which consists of a positioning ball, a positioning spring, and a positioning groove on the valve core, can provide a clear sense of the position when the valve core is switched to the correct position. The valve core is equipped with a valve core return spring inside. When the external operating force is removed, the spring can automatically and quickly drive the valve core from the working position back to the initial safe position, cut off the working air path and connect the exhaust, thereby preventing the equipment from abnormally maintaining its position under pressure loss, improving the safety of the entire pneumatic system, and realizing the fail-safe function of the valve.

[0007] This utility model further comprises an operating mechanism including a roller rotatably mounted on the valve body and a button axially movable on the valve body. A bracket is also fixedly mounted on the valve body, and the roller is rotatably mounted on the bracket fixed to the valve body via rivets. The operating mechanism efficiently converts external lateral force into axial movement of the button through the rotatable roller, and transforms sliding friction into low-resistance rolling friction, significantly reducing operational wear and extending service life.

[0008] This utility model is further configured with a baffle between the button and the valve core. The button has a transmission rod that passes through the baffle and contacts the top of the valve core. A button return spring is sleeved on the transmission rod, with one end abutting against the shoulder of the button and the other end abutting against the baffle. The button return spring provides a defined reset force to the button, ensuring that it can automatically return to its initial position.

[0009] This utility model is further configured to include a retaining sleeve fixed to the valve body, the retaining sleeve being fitted over the outside of the button. The retaining sleeve provides stable guidance for the movement of the button, preventing tilting and shaking.

[0010] This utility model is further configured such that a spring seat is also provided inside the valve body, with one end of the valve core return spring abutting against the shoulder of the valve core and the other end abutting against the spring seat. By setting the pre-compression amount of the valve core return spring through the spring seat, a definite return force is provided, ensuring that the valve core can immediately and automatically return to the preset safe position after the operating force is removed, realizing the fail-safe function of the valve and ensuring safety in the disabled state.

[0011] This utility model is further configured with sealing rings between the valve core and valve seat, between the transmission rod and baffle, between the baffle and valve body, and between the valve seat and valve body. The sealing rings constitute a complete sealing system, ensuring that the valve effectively prevents internal and external leakage of the medium under different operating and reset states.

[0012] This utility model is further configured such that when the operating mechanism is not driven, the valve core is in the first position, the air outlet is connected to the exhaust port, and the air inlet is closed. When the operating mechanism is driven, the valve core is pushed to the second position, the air inlet is connected to the air outlet, and the exhaust port is closed. This structural design ensures that when the valve's operating force is removed, the valve core automatically returns to the state of cutting off the air inlet and connecting the air outlet and exhaust port. This allows the valve to automatically cut off the power supply and immediately vent the compressed air from the actuator in the event of an accident or when the operator actively stops operation.

[0013] This utility model is further configured with connector assemblies for both the air inlet and outlet. Each connector assembly includes a connector, a locking claw, and a retaining sleeve that is axially slidably fitted onto the valve body. The connector is fixed within the port of the valve body, and the locking claw is an open, elastic annular structure located between the connector and the retaining sleeve. The quick-connect assemblies used at the air inlet and outlet enable rapid insertion and removal of the air tubing and reliable locking, facilitating easy installation.

[0014] This utility model is further configured with an interface sealing ring on the outer circumferential surface of the connector. By providing an interface sealing ring on the outer circumferential surface of the connector, a reliable static seal is provided for the connection between the valve and the external pipeline.

[0015] This invention further specifies that the positioning ball is a steel ball. By using a steel ball as the positioning ball, it has good wear resistance and impact resistance, extending the service life of the positioning mechanism. Attached Figure Description

[0016] Figure 1 This is a cross-sectional schematic diagram of the valve core in the first position according to an embodiment of the present invention.

[0017] Figure 2 This is a cross-sectional schematic diagram of the valve core in the second position according to an embodiment of the present invention. Detailed Implementation

[0018] like Figures 1-2 As shown, an embodiment of this utility model provides a roller-type mechanical valve. The valve body 1 is provided with an air inlet 11, an air outlet 12, and an exhaust port 13. The valve body 1 is provided with a valve seat 2 and an axially movable valve core 21, which is used to switch the air circuit connection state. Its working logic is as follows: when the operating mechanism 3 is not driven, the valve core 21 is in the first position, the air outlet 12 is connected to the exhaust port 13, and the air inlet 11 is closed. When the operating mechanism 3 is driven, the valve core 21 is pushed to the second position, the air inlet 11 is connected to the air outlet 12, and the exhaust port 13 is closed, thereby realizing the two-position three-way reversing function and fault safety reset.

[0019] The operating mechanism 3 is located on the top of the valve body 1 and includes a rotatable roller 31 and an axially movable button 32. A bracket 4 is fixedly installed on the valve body 1. The roller 31 is rotatably mounted on the bracket 4 by rivets 311, which can efficiently convert external lateral force into axial movement of the button 32. A baffle 33 is provided between the button 32 and the valve core 21. The transmission rod 321 of the button 32 passes through the baffle 33 and contacts the top of the valve core 21. A retaining sleeve 34 fixed inside the valve body 1 is sleeved on the outside of the button 32 to provide stable guidance for its axial movement.

[0020] The valve is equipped with a double return spring. A valve core return spring 211 is fitted on the valve core 21, with one end abutting against the shoulder of the valve core 21 and the other end supported by the spring seat 5 inside the valve body 1, ensuring that the valve core 21 can automatically return to the safe position after the drive is removed. A button return spring 35 is fitted on the transmission rod 321, with its two ends abutting against the shoulder of the button 32 and the baffle 33 respectively, providing a return force for the button 32. The valve body 1 is also equipped with a positioning mechanism 6, including a positioning spring and a steel ball 61 as a positioning ball. They cooperate with the positioning groove (not shown in the figure) on the outer circumference of the valve core 21 to provide a clear sense of the working position of the valve core 21 and prevent it from moving.

[0021] To ensure sealing, a first dynamic sealing ring (not shown in the figure) is provided between the valve core 21 and the valve seat 2, a second dynamic sealing ring 7 is provided between the transmission rod 321 and the baffle 33, a first static sealing ring 8 is provided between the baffle 33 and the valve body 1, and a second static sealing ring 9 is provided between the valve seat 2 and the valve body 1, which together constitute a complete sealing system.

[0022] Both the air inlet 11 and the air outlet 12 are equipped with quick connector assemblies 10, including a connector 101, a claw 102, and a sleeve 103 that can be axially slidably fitted on the valve body 1. The connector 101 is fixed inside the port of the valve body 1. The claw 102 is an open elastic ring structure and is located between the connector 101 and the sleeve 103, which facilitates quick insertion and removal and locking of the air tube. The interface sealing ring 104 provided on the outer periphery of the connector 101 ensures the sealing reliability of the connection.

[0023] Of course, in addition to the above embodiments, this utility model may have other various embodiments. Without departing from the essential technical solution of this utility model, those skilled in the art can make various corresponding changes and modifications based on this utility model, and these changes or modifications are equivalent to the technical solution in this patent. Therefore, these corresponding changes and modifications should all fall within the protection scope of the appended claims of this utility model, and the utility model creation is in line with the applicant's actual R&D capabilities and resource conditions.

Claims

1. A roller-type mechanical valve, comprising a valve body, wherein the valve body is provided with an air inlet, an air outlet, and an air exhaust outlet, characterized in that: The valve body has an externally driven operating mechanism at its top. Inside the valve body, there is a valve seat and a valve core that is axially movable within the valve seat. The operating mechanism is driven by the valve core and is used to drive the valve core to move axially within the valve seat to switch the connection state between the air inlet, air outlet, and exhaust port. A valve core return spring is fitted on the valve core for resetting. The valve body has a positioning mechanism, which includes a positioning ball and a positioning spring that applies a radial force to the positioning ball. The outer circumferential surface of the valve core has a positioning groove that mates with the positioning ball.

2. The roller-type mechanical valve according to claim 1, characterized in that: The operating mechanism includes a roller rotatably mounted on the valve body and a button axially movable on the valve body. A bracket is also fixedly mounted on the valve body, and the roller is rotatably mounted on the bracket fixed to the valve body by rivets.

3. The roller-type mechanical valve according to claim 2, characterized in that: A baffle is provided between the button and the valve core. The button has a transmission rod that passes through the baffle and contacts the top of the valve core. A button reset spring is sleeved on the transmission rod. One end of the button reset spring abuts against the shoulder of the button, and the other end abuts against the baffle.

4. The roller-type mechanical valve according to claim 3, characterized in that: It also includes a retainer fixed to the valve body, the retainer being fitted over the outside of the button.

5. The roller-type mechanical valve according to claim 1, characterized in that: The valve body is also provided with a spring seat, one end of the valve core return spring abuts against the shoulder of the valve core, and the other end abuts against the spring seat.

6. The roller-type mechanical valve according to claim 3, characterized in that: Sealing rings are provided between the valve core and the valve seat, between the transmission rod and the baffle, between the baffle and the valve body, and between the valve seat and the valve body.

7. The roller-type mechanical valve according to claim 1, characterized in that: When the operating mechanism is not driven, the valve core is in the first position, the air outlet is connected to the air exhaust port, and the air inlet is closed. When the operating mechanism is driven, the valve core is pushed to the second position, the air inlet is connected to the air outlet, and the air exhaust port is closed.

8. The roller-type mechanical valve according to claim 1, characterized in that: Both the air inlet and the air outlet are provided with connector assemblies. The connector assembly includes a connector, a claw, and a sleeve that is axially slidably fitted on the valve body. The connector is fixed inside the port of the valve body, and the claw is an open elastic annular structure located between the connector and the sleeve.

9. The roller-type mechanical valve according to claim 8, characterized in that: An interface sealing ring is provided on the outer circumferential surface of the connector.

10. The roller-type mechanical valve according to claim 1, characterized in that: The positioning ball is a steel ball.

Images