A control device for low-voltage large-diameter switch gas circuit

Abstract

The utility model provides a control device for low pressure large -bore switch gas path, including first support, linear telescopic part, universal joint, drive control part, detection subassembly and protection subassembly, wherein, the fixed end of linear telescopic part is rotatablely connected with first support, and the rotation plane of linear telescopic part is mutually parallel with the rotation plane of valve stem, first support is used for fixed connection with ground, and the movable end of linear telescopic part is fixedly connected with one end of universal joint, and the other end of universal joint is fixedly connected with the force -applied end of valve stem, drive control part is connected with linear telescopic part, is used for controlling linear telescopic part retraction, so that movable end of linear telescopic part drives valve stem to rotate around valve through universal joint, detection subassembly sets up above or below the movement path of valve stem, is used for controlling linear telescopic part to stop moving under the condition of detecting that valve stem rotates to the place, and protection subassembly is fixedly arranged on linear telescopic part.

Description

Technical Field

[0001] This utility model relates to the field of switch control technology, and more specifically, to a control device for a low-pressure, large-diameter switch gas circuit. Background Technology

[0002] In low-pressure, large-diameter on / off pneumatic circuits, rotary electric valves are traditionally used to control valves in these pipelines. However, rotary electric actuators have several problems: during operation, they are prone to over-opening, leading to damage to the reduction gear mechanism, motor burnout, and other malfunctions. These malfunctions are extremely difficult to repair, and the installation environment for upgrading electric actuators is often poor, requiring long maintenance times and a large number of maintenance personnel, resulting in high maintenance costs. Therefore, a new control method is urgently needed to replace the existing electric actuators and solve these problems. Utility Model Content

[0003] In view of this, the present invention proposes a control device for a low-pressure, large-diameter switch gas circuit to solve the problems existing in the prior art.

[0004] To achieve the above objectives, this utility model proposes a control device for a low-pressure, large-diameter switch gas circuit, comprising a first bracket, a linear telescopic component, a universal joint, a drive control component, a detection component, and a protection component; The fixed end of the linear telescopic member is rotatably connected to the first bracket, and the rotation plane of the linear telescopic member is parallel to the rotation plane of the valve stem; the first bracket is used for fixed connection with the ground. The movable end of the linear telescopic component is fixedly connected to one end of the universal joint, and the other end of the universal joint is fixedly connected to the force-applying end of the valve stem. The drive control component is connected to the linear telescopic member and is used to control the extension and retraction of the linear telescopic member so that the movable end of the linear telescopic member drives the valve stem to rotate around the valve through the universal joint; The detection component is positioned above or below the valve stem's movement path, and is used to control the linear telescopic component to stop moving when the valve stem is detected to have rotated to the correct position. The protective component is fixedly mounted on the linear telescopic member.

[0005] In one embodiment, the linear telescopic member includes a cylinder, and the drive control component includes a solenoid valve, which is connected to the cylinder via an air circuit.

[0006] In one embodiment, the linear telescopic member includes a linear motor, and the drive control component includes a motor driver, which is connected to the linear motor via a wire.

[0007] In one embodiment, the linear telescopic member includes a hydraulic cylinder, and the drive control component includes a hydraulic pump, which is connected to the hydraulic cylinder via a hydraulic line.

[0008] In one embodiment, the detection component includes a first proximity switch, a second proximity switch, and a switch bracket; The switch bracket is fixedly disposed above or below the valve stem. The first proximity switch and the second proximity switch are both fixedly connected to the switch bracket. The detection ends of the first proximity switch and the second proximity switch are disposed facing the valve stem. The first proximity switch corresponds to the position of the valve stem in the closed state, and the second proximity switch corresponds to the position of the valve stem in the first open state.

[0009] In one embodiment, the detection component further includes a third proximity switch, which is fixedly connected to the switch bracket. The detection end of the third proximity switch is positioned facing the valve stem, and the third proximity switch corresponds to the position of the valve stem in the second open state.

[0010] In one embodiment, the first proximity switch, the second proximity switch, and the third proximity switch all have external threaded sections at their upper and lower ends, and the upper and lower ends of the first proximity switch, the second proximity switch, and the third proximity switch are all fixed to the switch bracket by nuts.

[0011] In one embodiment, the first bracket has a hinge seat, and the fixed end of the linear telescopic member is rotatably connected to the hinge seat.

[0012] In one embodiment, the universal joint is fixedly connected to the valve stem via a connecting sleeve.

[0013] In one embodiment, the protective assembly includes a housing, a sealing ring, a filter, and a fan; The outer shell is fitted onto the linear telescopic member, the outer shell is fixedly connected to the fixed end of the linear telescopic member, the outer shell is slidably connected to the movable end of the linear telescopic member, and the outer shell at least covers the joint between the fixed end and the movable end of the linear telescopic member. The sealing ring is provided at the contact point between the outer shell and the movable end of the linear telescopic member; The top of the housing has an air inlet, the filter is fixedly installed on the top of the housing and corresponds to the position of the air inlet, and the fan is fixedly installed on the top of the filter for blowing air into the housing; the bottom of the housing has multiple exhaust holes, which are located away from the air inlet.

[0014] Compared with existing technologies, the beneficial effect of this utility model's control device for low-pressure, large-diameter switching gas circuits lies in its direct monitoring of the actual rotation position of the valve stem through a detection component. Once the valve stem is detected to be in position, the detection component immediately sends a signal to the drive control component, which then precisely controls the linear telescopic component to stop its telescopic movement. This direct position detection and hard-stop mechanism fundamentally avoids over-travel. The linear telescopic component has a relatively simple structure with fewer moving parts and a short, direct transmission chain, significantly reducing potential mechanical failure points. The simplified structure makes maintenance operations more convenient, typically requiring fewer maintenance personnel and significantly shortening maintenance time, thereby significantly reducing maintenance costs and downtime losses caused by maintenance. Attached Figure Description

[0015] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of the invention. In the drawings: Figure 1 This is a schematic diagram of the control device for a low-pressure, large-diameter switch gas circuit in an embodiment of the present invention. Figure 2 This is a schematic diagram of the proximity switch and switch bracket in an embodiment of the present invention; Figure 3 This is a side view of the proximity switch and switch bracket in an embodiment of the present utility model; Figure 4 This is a schematic diagram of the protective component in an embodiment of the present utility model; Figure 5 This is a top view of the protective component in an embodiment of the present utility model; Figure 6 This is a bottom view of the protective component in an embodiment of the present invention.

[0016] Reference numerals: 1. First bracket; 2. Hinge seat; 3. Linear telescopic component; 4. Drive control component; 5. Universal joint; 6. Connecting sleeve; 71. Valve stem; 72. First proximity switch; 73. Second proximity switch; 74. Third proximity switch; 75. Switch bracket; 76. Nut; 81. Housing; 82. Sealing ring; 83. Exhaust port; 84. Filter; 85. Fan; 91. Pipeline; 92. Valve. Detailed Implementation

[0017] Exemplary embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the disclosure to those skilled in the art. It should be noted that, unless otherwise specified, embodiments and features of the present invention can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0018] Reference Figure 1 This embodiment proposes a control device for a low-pressure, large-diameter switch gas circuit, including a first bracket 1, a linear telescopic member 3, a universal joint 5, a drive control component 4, a detection component, and a protection component. The fixed end of the linear telescopic member 3 is rotatably connected to the first bracket 1, and the rotation plane of the linear telescopic member 3 is parallel to the rotation plane of the valve stem 71. The first bracket 1 is fixedly connected to the ground. The movable end of the linear telescopic member 3 is fixedly connected to one end of the universal joint 5, and the other end of the universal joint 5 is fixedly connected to the force-applying end of the valve stem 71. The application of the universal joint 5 effectively compensates for installation errors and minor misalignments that may exist between the linear telescopic member 3 and the valve stem 71, avoiding component deformation or damage caused by stress concentration, and improving the reliability of the transmission and the service life of the mechanism.

[0019] The drive control component 4 is connected to the linear telescopic component 3 and is used to control the extension and retraction of the linear telescopic component 3 so that the movable end of the linear telescopic component 3 drives the valve stem 71 to rotate around the valve 92 through the universal joint 5. The valve 92 is installed on the pipeline 91. The detection component is set above or below the movement path of the valve stem 71 and is used to control the linear telescopic component 3 to stop moving when the valve stem 71 is detected to have rotated to the correct position. The protection component is fixedly set on the linear telescopic component 3.

[0020] This solution directly monitors the actual rotational position of the valve stem 71 using detection components (such as limit switches or position sensors). Once the valve stem 71 is detected to have rotated to the correct position (fully open or fully closed), the detection component immediately sends a signal to the drive control unit 4. The drive control unit 4 then precisely controls the linear telescopic component 3 (such as an electric push rod, cylinder, or hydraulic cylinder) to stop its telescopic movement. This direct position detection and hard stop mechanism fundamentally avoids overtravel. The linear telescopic component 3 has a relatively simple structure (linear motor, hydraulic / pneumatic piston), fewer moving parts, and a short and direct transmission chain, significantly reducing potential mechanical failure points. The simplified structure makes maintenance operations more convenient, typically requiring fewer maintenance personnel and significantly reducing maintenance time, thereby significantly reducing maintenance costs and downtime losses due to maintenance.

[0021] In some embodiments, the linear telescopic member 3 includes a cylinder, and the drive control component 4 includes a solenoid valve, which is connected to the cylinder via an air circuit. This embodiment solves a series of problems caused by over-opening of the electric valve by replacing the original electric actuator with a cylinder and a solenoid valve. Simultaneously, it simplifies operation, increases valve opening and closing speed, lowers price, reduces maintenance costs and time investment, and improves the reliability and efficiency of low-pressure, large-diameter on / off pneumatic valve control.

[0022] In actual operation, the device is simple to operate and has a fast switching speed. Tests have shown that its switching action time is 80% shorter than that of the original electric actuator, and only one person is needed for maintenance, reducing maintenance time by 75%, which greatly reduces costs.

[0023] In the above embodiments, in order to ensure that the cylinder has the same driving torque as the electric angular stroke actuator in the prior art, thereby ensuring the valve control effect, the cylinder specification needs to be selected according to a specific calculation method, which is mainly based on the torque balance principle.

[0024] The output torque Melectric of the electric rotary actuator can be obtained from its parameter manual. The torque Mair generated by the cylinder must be equal to Melectric, i.e., Mair = Melectric.

[0025] The formula for calculating the torque M_air generated by the cylinder is: M_air = F × L, where F is the thrust of the cylinder and L is the distance from the point of action of the cylinder piston rod to the center of rotation of the valve.

[0026] The formula for calculating the thrust F of the cylinder is: F = P × A, where P is the air source pressure and A is the effective working area of ​​the cylinder piston.

[0027] The formula for calculating the effective working area A of the cylinder piston is: A = π × (D / 2) 2 Where D is the cylinder diameter.

[0028] Combining the above formulas, we get: Melectric = P × π × (D / 2) 2 ×L, the required cylinder diameter D can be calculated using this formula, and then a cylinder with the same specifications as the torque of the electric rotary actuator can be selected.

[0029] Explanation of the selection and replacement of the universal joint with the angular stroke actuator. In this embodiment, the cylinder uses a universal joint connection to replace the original angular stroke actuator.

[0030] Universal joints are capable of transmitting motion and power at different shaft angles. In the connection between cylinders and valves, they can effectively accommodate angular deviations that may occur during installation, reducing additional stress on the cylinder and valve caused by inaccurate installation. This ensures that the driving torque of the cylinder is accurately and effectively transmitted to the valve, guaranteeing the normal opening and closing of the valve. Compared to rotary actuators, universal joints have a simpler structure, greater flexibility, and are better suited to the complex installation environment of low-pressure, large-diameter switching pneumatic circuits.

[0031] The following is a comparison of the indicators in the above embodiments with those in the prior art: Weight: Electric rotary actuators are relatively heavy due to the inclusion of components such as motors and reduction gears, typically weighing over 50kg; while cylinders have a relatively simple structure, mainly consisting of a cylinder body, piston, and piston rod, and are much lighter, generally weighing less than 2kg for the same specifications, which greatly reduces the load on the pipeline.

[0032] Costs: The manufacturing cost of electric rotary actuators is relatively high. Including the cost of components such as motors, the procurement cost is usually over 800 yuan. In contrast, the cost of cylinders and supporting components such as solenoid valves and universal joints is lower, and the overall procurement cost is generally below 150 yuan, which can significantly reduce the equipment investment cost.

[0033] Maintenance personnel and time: Electric rotary actuators have a complex structure, and when they malfunction, they require professional technicians to repair them. The repair process requires the disassembly of multiple parts, and usually requires more than 3 repair personnel, with a repair time of more than 4 hours. In contrast, cylinders have a simple structure and fewer failure points, and can usually be repaired by 1 person, with a repair time of less than 1 hour, which greatly reduces maintenance investment.

[0034] Action time: Due to the influence of the motor starting and deceleration process, the switching action time of electric rotary actuators is relatively long, generally more than 10 seconds; while cylinders rely on compressed air for driving, and the action response is rapid, with a shorter switching action time, usually less than 3 seconds, which improves the control efficiency of valves.

[0035] In some embodiments, the linear telescopic member 3 includes a linear motor, and the drive control component 4 includes a motor driver, which is connected to the linear motor via wires.

[0036] In some embodiments, the linear telescopic member 3 includes a hydraulic cylinder, and the drive control component 4 includes a hydraulic pump, which is connected to the hydraulic cylinder via a hydraulic pipeline.

[0037] In some embodiments, refer to Figure 2 and Figure 3The detection assembly includes a first proximity switch 72, a second proximity switch 73, and a switch bracket 75. The switch bracket 75 is fixedly disposed above or below the valve stem 71. Both the first proximity switch 72 and the second proximity switch 73 are fixedly connected to the switch bracket 75. The detection ends of the first proximity switch 72 and the second proximity switch 73 face the valve stem 71. The first proximity switch 72 corresponds to the valve stem 71 in the closed state, and the second proximity switch 73 corresponds to the valve stem 71 in the first open state.

[0038] The direct, physical position detection method described in the above embodiments is highly accurate and has a fast response. The detection signal is immediately fed back to the drive control component 4, which quickly cuts off the power to the linear telescopic component 3, causing it to stop precisely at the target position. This fundamentally eliminates the "overshooting" phenomenon caused by inertia, deceleration mechanism failure, or control errors in traditional electric actuators, thus completely avoiding serious malfunctions such as deceleration mechanism damage and motor burnout. The detection assembly consists of only two fixed proximity switches and a mounting bracket. The switch bracket 75 is fixed to the valve or a stable nearby structure (such as the valve body or ground support) to ensure that the detection ends of the first proximity switch 72 and the second proximity switch 73 are stably and accurately aligned with the movement path of the valve stem 71.

[0039] In some embodiments, the detection assembly further includes a third proximity switch 74, which is fixedly connected to a switch bracket 75. The detection end of the third proximity switch 74 is positioned facing the valve stem 71, and the third proximity switch 74 corresponds to the position of the valve stem 71 in the second open state. When the valve stem 71 is in the second open state, the valve 92 may also be in the open state. This embodiment has two valve 92 open positions.

[0040] In some embodiments, the first proximity switch 72, the second proximity switch 73, and the third proximity switch 74 all have external threaded sections at their upper and lower ends, and the upper and lower ends of the first proximity switch 72, the second proximity switch 73, and the third proximity switch 74 are all fixed to the switch bracket 75 by nuts 76. The nuts 76 facilitate the disassembly and replacement of the proximity switches.

[0041] In some embodiments, the first bracket 1 has a hinge seat 2, and the fixed end of the linear telescopic member 3 is rotatably connected to the hinge seat 2.

[0042] In some embodiments, the universal joint 5 is fixedly connected to the valve stem 71 via the connecting sleeve 6.

[0043] In some embodiments, refer to Figures 4 to 6The protective components include a housing 81, a sealing ring 82, a filter 84, and a fan 85. The housing 81 is fitted onto the linear telescopic member 3, and is fixedly connected to the fixed end of the linear telescopic member 3. The housing 81 is slidably connected to the movable end of the linear telescopic member 3, and at least covers the joint between the fixed and movable ends of the linear telescopic member 3. This provides robust, all-around physical protection for the core moving parts and internal structure of the linear telescopic member 3. It effectively blocks common on-site dust, sand, water droplets, oil splashes, as well as accidental mechanical collisions or trampling, greatly reducing the risk of environmental factors (such as humidity and corrosive gases) eroding and damaging the internal precision components.

[0044] A sealing ring 82 is provided at the contact point between the outer casing 81 and the movable end of the linear telescopic member 3; this sealing ring provides a continuous dynamic seal during the telescopic movement of the movable end. It effectively prevents external contaminants (especially fine dust and water mist) from entering the interior through the tiny gap between the movable end and the outer casing.

[0045] The top of the housing 81 has an air inlet, and a filter 84 is fixedly installed on the top of the housing 81, corresponding to the position of the air inlet. A fan 85 is fixedly installed on top of the filter 84 for blowing air into the housing 81. The bottom of the housing 81 has multiple exhaust holes 83, which are located away from the air inlets. The motor and transmission components of the linear telescopic member 3 (especially the electric actuator) generate heat during operation. Continuously supplied clean, cool air flows through the heat-generating components, carrying heat and being discharged from the exhaust holes 83 at the bottom, forming an effective forced convection heat dissipation channel. This significantly reduces the internal operating temperature of the linear telescopic member 3, avoiding the risk of motor overheating, efficiency degradation, or burnout.

[0046] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and not to limit it. Although the utility model has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the specific implementation of this utility model. Any modifications or equivalent substitutions that do not depart from the spirit and scope of this utility model should be covered within the protection scope of the claims of this utility model.

Claims

1. A control device for a low-pressure, large-diameter switch gas circuit, characterized in that, Includes a first bracket (1), a linear telescopic component (3), a universal joint (5), a drive control component (4), a detection component, and a protective component; The fixed end of the linear telescopic member (3) is rotatably connected to the first bracket (1), and the rotation plane of the linear telescopic member (3) is parallel to the rotation plane of the valve stem (71); the first bracket (1) is used to be fixedly connected to the ground. The movable end of the linear telescopic component (3) is fixedly connected to one end of the universal joint (5), and the other end of the universal joint (5) is fixedly connected to the force-applying end of the valve stem (71). The drive control component (4) is connected to the linear telescopic component (3) and is used to control the extension and retraction of the linear telescopic component (3) so that the movable end of the linear telescopic component (3) drives the valve stem (71) to rotate around the valve (92) through the universal joint (5); The detection component is positioned above or below the movement path of the valve stem (71) and is used to control the linear telescopic member (3) to stop moving when the valve stem (71) is detected to have rotated into place. The protective component is fixedly mounted on the linear telescopic member (3).

2. The control device for a low-pressure, large-diameter switch gas circuit according to claim 1, characterized in that, The linear telescopic component (3) includes a cylinder, and the drive control component (4) includes a solenoid valve, which is connected to the cylinder via an air circuit.

3. The control device for a low-pressure, large-diameter switch gas circuit according to claim 1, characterized in that, The linear telescopic component (3) includes a linear motor, and the drive control component (4) includes a motor driver, which is connected to the linear motor via a wire.

4. The control device for a low-pressure, large-diameter switch gas circuit according to claim 1, characterized in that, The linear telescopic component (3) includes a hydraulic cylinder, and the drive control component (4) includes a hydraulic pump. The hydraulic pump and the hydraulic cylinder are connected through a hydraulic pipeline.

5. The control device for a low-pressure, large-diameter switch gas circuit according to claim 1, characterized in that, The detection assembly includes a first proximity switch (72), a second proximity switch (73), and a switch bracket (75). The switch bracket (75) is fixedly disposed above or below the valve stem (71). The first proximity switch (72) and the second proximity switch (73) are both fixedly connected to the switch bracket (75). The detection ends of the first proximity switch (72) and the second proximity switch (73) are disposed facing the valve stem (71). The first proximity switch (72) corresponds to the position of the valve stem (71) in the closed state, and the second proximity switch (73) corresponds to the position of the valve stem (71) in the first open state.

6. The control device for a low-pressure, large-diameter switch gas circuit according to claim 5, characterized in that, The detection assembly also includes a third proximity switch (74), which is fixedly connected to the switch bracket (75). The detection end of the third proximity switch (74) is positioned facing the valve stem (71), and the third proximity switch (74) corresponds to the position of the valve stem (71) in the second open state.

7. The control device for a low-pressure, large-diameter switch gas circuit according to claim 6, characterized in that, The first proximity switch (72), the second proximity switch (73) and the third proximity switch (74) all have external thread sections at their upper and lower ends. The upper and lower ends of the first proximity switch (72), the second proximity switch (73) and the third proximity switch (74) are all fixed to the switch bracket (75) by nuts (76).

8. The control device for a low-pressure, large-diameter switch gas circuit according to claim 1, characterized in that, The first bracket (1) has a hinge seat (2), and the fixed end of the linear telescopic member (3) is rotatably connected to the hinge seat (2).

9. The control device for a low-pressure, large-diameter switch gas circuit according to claim 1, characterized in that, The universal joint (5) is fixedly connected to the valve stem (71) via a connecting sleeve (6).

10. The control device for a low-pressure, large-diameter switch gas circuit according to claim 1, characterized in that, The protective components include a housing (81), a sealing ring (82), a filter (84), and a fan (85). The outer shell (81) is fitted onto the linear telescopic member (3), the outer shell (81) is fixedly connected to the fixed end of the linear telescopic member (3), the outer shell (81) is slidably connected to the movable end of the linear telescopic member (3), and the outer shell (81) at least covers the joint between the fixed end and the movable end of the linear telescopic member (3). The sealing ring (82) is provided at the contact point between the outer shell (81) and the movable end of the linear telescopic member (3). The top of the housing (81) has an air inlet hole, the filter (84) is fixedly installed on the top of the housing (81) and corresponds to the position of the air inlet hole, the fan (85) is fixedly installed on the top of the filter (84) and is used to blow air into the housing (81); the bottom of the housing (81) has a plurality of exhaust holes (83), the exhaust holes (83) are located away from the air inlet hole.

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