Device for automatically adjusting position of valve rod of altitude valve and quickly positioning valve rod of altitude valve

Abstract

The invention discloses a height valve rod position automatic adjusting and rapid positioning device. The height valve rod position automatic adjusting and rapid positioning device comprises an electric cabinet, a rotary table, a servo motor, a connecting frame, an air cylinder connector assembly, an air cylinder clamping mechanism and a positioning tool. The electric cabinet works, a preset program runs, the cylinder clamping mechanism clamps the shifting shaft, and the cylinder connector is inflated to be quickly connected with an air hole of the altitude valve. The front-end gas pressure is controlled to be adjusted according to the rear-end gas output and the angle of the shifting shaft, and the accurate angle of the shifting shaft is found. And a valve rod is arranged at the position. According to the method, a high-precision rotating mechanism and a control program are adopted to realize automatic adjustment of the valve rod position of the height valve, the valve rod mounting position is quickly and accurately found, the labor intensity of testers is reduced, and time waste is reduced.

Description

Technical Field

[0001] The invention relates to a rail transit braking system, in particular to an automatic adjustment and rapid positioning device for a height valve stem. Background Art

[0002] At present, during the test of the brake system height valve, the horizontal position of the height valve stem needs to be adjusted to meet the performance requirements. Under the existing conditions, it is impossible to automatically adjust the horizontal position of the height valve stem and quickly position it. It needs to be adjusted manually many times, the test time is long and the workers' proficiency is required to be high. Summary of the invention

[0003] In view of the problems existing in the prior art, the present invention provides a device for automatically adjusting and quickly positioning the valve stem of a height valve, which can quickly find the installation position of the valve stem.

[0004] The purpose of the present invention is achieved through the following technical solutions.

[0005] A device for automatically adjusting and quickly positioning the valve stem position of a height valve comprises a dividing plate, the dividing plate is mounted on an operating table, a servo motor and a rotating table are mounted on the dividing plate, a cylinder A, a cylinder B, a cylinder C and a rod fixing tool are fixed on the rotating table, a joint A, a joint B and a joint C are connected to the cylinder A, the cylinder B and the cylinder C respectively, a clamping claw is fixed on the claw cylinder, a locking mechanism is fixed on the locking cylinder, the claw cylinder and the locking cylinder are mounted on the operating table, and a solenoid valve island, an air cylinder and a pressure sensor are mounted on the operating table. Inside the workbench, the PLC programmable logic controller, pressure regulating valve, servo controller and power supply are installed in the electrical control box; the selection switch and start / stop button are installed on the outside of the electrical control box, and the clamping mechanism is fixed on the connecting frame; the rotating table is installed with a cylinder joint mechanism, and the rotating table is driven by a servo motor to drive the height valve to move and adjust the position angle; the cylinder is connected to an external air source, and air is supplied to the cylinder through an air pipe, driving the finger-clamp cylinder joint to quickly connect to the height valve air hole, and driving the double-rod cylinder clamp to accurately clamp the height valve dial shaft.

[0006] When the height valve is assembled except the height valve stem, the operator installs the height valve on the rotating table and fixes the horizontal rod on the rod fixing tooling. At this time, the bolts on the horizontal rod are not tightened, and the horizontal rod and the dial shaft are in a relatively rotatable state. Set the selection button to the corresponding position according to the height valve model, click the start button, and the PLC programmable logic controller controls the corresponding solenoid valve according to the loaded program logic to extend cylinder A, cylinder B, and cylinder C, and joints A, B, and C are pressed against the three corresponding ports of the height valve. Since there are sealing gaskets on the joints, the joints and the height valve form a closed air path.

[0007] First, the solenoid valve corresponding to the rear clamping jaw cylinder is energized, and the clamping jaw clamps the height valve dial shaft. Then the solenoid valve corresponding to the locking mechanism is energized, so that the locking mechanism locks the clamping jaw. This clamping process realizes electric-pneumatic rapid automatic control.

[0008] After the locking mechanism locks the clamping jaws, the PLC programmable logic controller sends a control signal to the servo controller to drive the servo motor. The dividing plate drives the rotary table to start rotating, causing the height valve dial shaft and the height valve body to rotate. At the same time, the solenoid valve is controlled to supply air to connector A. The PLC programmable controller detects the pressure sensor connected to the air outlet of the height valve in real time. When the pressure of the pressure sensor rises to the set value, the servo motor stops working. At the same time, the indicator light on the operating table turns green and stays on. The worker uses a torque wrench to tighten the fastening bolts on the horizontal rod of the height valve, marks it with an anti-loosening mark, and clicks the stop button.

[0009] The PLC programmable controller controls the servo motor to rotate in the opposite direction. The indicator light of the motor keeps flashing during operation until the height valve reaches the initial position and stops rotating. After that, the indicator light goes out, the solenoid valve of the control joint A stops supplying air, and cylinders A, B, and C retract.

[0010] The air source is energized through the pressure regulating valve to control the solenoid valve and continuously supply air to the air inlet of the height valve through connector A. When the height valve body rotates in the inflation direction through the servo motor and the height valve shift shaft, the air inlet valve of the height valve opens to realize inflation. When the outlet pressure reaches the set value, the servo motor stops working.

[0011] The selection switch corresponds to two models of height valves, the L type can rotate clockwise, and the R type can rotate counterclockwise. Different models have different rotation directions set in the PLC programmable controller program, and the maximum rotation angle is set in the program.

[0012] The set value is 20kpa.

[0013] The air outlet of the pressure regulating valve is connected to the air inlet of each two-position three-way solenoid valve, and the air outlet of each two-position three-way solenoid valve is connected to each cylinder respectively.

[0014] The front end of the cylinder is equipped with a sliding mechanism. After the cylinder is inflated, the sliding block is pushed out to drive the clamping assembly to work. The sliding mechanism includes a sliding rod axially arranged on the height valve air hole and a sliding block vertically arranged on the height valve dial shaft.

[0015] Compared with the prior art, the advantages of the present invention are: 1. The present invention uses an automatic quick adjustment program to find the required valve stem installation position. The height valve after the valve stem is manually installed at this position is the height valve with the valve stem in the horizontal position, that is, a qualified height valve. The selection switch can correspond to the selection of two models of height valves. The L type can rotate clockwise and the R type can rotate counterclockwise. Different models have been set in advance in different rotation directions in the PLC program, and the maximum rotation angle is set in the program. The positioning tool can move together when the turntable rotates, and the installation position of the valve stem can be quickly located at each angle of the turntable rotation. The front end has a pressure regulating valve and a two-position three-way solenoid valve island. The air inlet of the pressure regulating valve is connected to the air source, the air outlet is connected to the air inlet of the two-position three-way solenoid valve, and the air outlet of the two-position three-way solenoid valve is connected to the clamping cylinder. The cylinder is connected to the joint and the clamping mechanism, and the solenoid valve is driven to act when it is inflated. The rear end has a load air cylinder, a pressure sensor, and an external pressure gauge. The air outlet of the height valve is connected to the load air cylinder. A pressure sensor is installed on the air cylinder to monitor the pressure, and a pressure gauge is externally connected to the rear end of the air cylinder. The front end of the cylinder is equipped with a sliding mechanism. After the cylinder is inflated, the sliding block is pushed out to drive the clamping assembly to work. The invention records the corresponding rotation angle and quickly locates the critical point of dead zone inflation. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 and Figure 2 It is a structural schematic diagram of the present invention.

[0017] Figure 3 It is the electrical topology diagram of the present invention.

[0018] Figure 4 , Figure 5 , Figure 6 It is a schematic diagram of the working state of the present invention.

[0019] Figure 7 It is the gas path principle diagram of the present invention.

[0020] In the figure: 1-operating table; 2-cylinder A; 3-cylinder B; 4-locking mechanism; 5-clamping jaws; 6-clamping jaw cylinder; 7-rod fixing tooling-height valve; 9-rotating table; 10-cylinder C; 11-connectors B, C; 12-connector A; 13-servo motor; 14-indexing plate; 15-locking cylinder; 16-power supply; 17-servo controller; 18-PLC programmable logic controller; 19-horizontal rod; 20-dial shaft. DETAILED DESCRIPTION

[0021] The present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0022] like Figure 1-6As shown, the present invention includes an electric control box, a servo motor, a turntable, a connecting frame, a cylinder joint, a cylinder clamping mechanism, and a positioning tooling connected in sequence. The electric control box is externally installed with a selection switch and a start / stop button, and internally installed with a power supply and a PLC; the clamping mechanism is fixed on the connecting frame; the turntable is installed with a cylinder joint mechanism, and the turntable is driven by a servo motor to drive the height valve to move and adjust the position angle; the cylinder is connected to an external air source, and the cylinder is supplied with air through an air pipe, which drives the finger clamp cylinder joint to quickly connect to the height valve air hole, and drives the double-rod cylinder to grasp and clamp the height valve dial shaft accurately. The indexing plate 14 is installed on the operating table, the servo motor 13 and the turntable 9 are installed on the indexing plate 14, the cylinder A2, the cylinder B3, the cylinder C10, and the rod fixing tooling 7 are on the turntable 9, the joints A / B / C are respectively installed and connected to the cylinders A / B / C, the clamping claw 5 is fixed on the clamping claw cylinder, the locking mechanism 4 is fixed on the locking cylinder 15, and the clamping claw cylinder and the locking cylinder are installed on the operating table. The solenoid valve island, air cylinder, pressure sensor and other circuit components are installed inside the operating table, and the PLC programmable logic controller 18, pressure regulating valve, servo controller 17, power supply 16 are installed inside the electrical control box.

[0023] When the height valve is assembled except the height valve stem, the operator installs the height valve on the rotating table 9 (such as Figure 4 As shown in the figure, the horizontal rod is fixed on the rod fixing fixture 7 (the bolts on the horizontal rod are not tightened at this time, and the horizontal rod and the dial shaft are in a relatively rotatable state), and the selection button is set to the corresponding position according to the height valve model. Click the start button, and the PLC programmable logic controller 18 controls the corresponding solenoid valve according to the loaded program logic, so that the cylinder A2, cylinder B3, and cylinder C10 extend, and the connectors A / B / C are pressed against the three corresponding ports of the height valve (as shown in the figure). Figure 5 As shown), since there is a sealing gasket on the joint, the joint A / B / C is tightly attached to the product interface through the force of the cylinder. The sealing gasket structure ensures that there is no air leakage, so that the joint and the height valve form a closed air path. After 5 seconds, the solenoid valve corresponding to the clamping jaw cylinder 6 is energized, and the clamping jaw 5 clamps the height valve dial shaft. After 5 seconds, the solenoid valve corresponding to the locking mechanism 4 is energized, so that the locking mechanism 4 locks the clamping jaw 5 (as shown). Figure 5 As shown), this clamping process realizes electric-pneumatic rapid automatic control, eliminating the need for manual work by workers and reducing time waste. After 5 seconds, the PLC programmable logic controller 18 sends a control signal to the servo controller 17 to drive the servo motor 13, and the dividing plate 14 drives the rotating table 9 to start rotating, causing the height valve dial shaft and the height valve body to rotate. At the same time, the solenoid valve is controlled to supply air to the connector A12, and the PLC programmable controller 18 detects the pressure sensor connected to the air outlet of the height valve in real time. When the pressure of the pressure sensor rises by 20 kPa, the servo motor 17 is stopped. At the same time, the indicator light on the operating table turns green and the worker uses a torque wrench to tighten the fastening bolts on the horizontal rod of the height valve (such as Figure 6As shown), after marking the anti-loosening mark, click the stop button. The PLC programmable controller 18 controls the servo motor 13 to rotate in the opposite direction. During the operation of the motor, the indicator light keeps flashing at a frequency of 1Hz until the height valve reaches the initial position and stops rotating. After that, the indicator light goes out, the solenoid valve of the control joint A stops supplying air, and the cylinders A2, B3, and C10 retract. Figure 7 As shown, the air source is energized through the pressure regulating valve to control the solenoid valve and continuously supplies air to the height valve inlet through connector A. When the height valve body rotates in the inflation direction through the servo motor and the height valve shaft, the height valve inlet valve port opens to achieve inflation until the outlet pressure (read by the pressure sensor at the rear end of connectors B and C) reaches the set value of 20kpa, and the servo motor stops working.

[0024] In the above mechanism, to ensure safety, the maximum rotation angle of the rotating platform 9 can be set by program to prevent the horizontal rod of the height valve from being bent. The air supply pressure of the height valve can be adjusted by the pressure regulating valve to reach the maximum pressure used by the height valve. The pressure gauge installed on the air cylinder can be used to confirm whether there is high-pressure gas in the air outlet during debugging or use to ensure personnel safety.

[0025] In addition to the above embodiments, the present invention may also have other implementation modes. Any technical solution formed by equivalent replacement or equivalent transformation falls within the protection scope required by the present invention.

Claims

1. A height valve stem position automatic adjustment and rapid positioning device, characterized in that It includes a dividing plate, which is installed on an operating table, a servo motor and a rotating table are installed on the dividing plate, cylinder A, cylinder B, cylinder C and a rod fixing tool are fixed on the rotating table, joints A, joints B and joints C are connected to cylinder A, cylinder B and cylinder C respectively, clamping claws are fixed on the claw cylinder, and a locking mechanism is fixed on the locking cylinder. The claw cylinder and the locking cylinder are installed on the operating table, the solenoid valve island, the air cylinder and the pressure sensor are installed inside the operating table, and the PLC programmable logic controller, the pressure regulating valve, the servo controller and the power supply are installed inside the electrical control box; the selection switch and the start-stop button are installed on the outside of the electrical control box, and the clamping mechanism is fixed on the connecting frame; the cylinder joint mechanism is installed on the rotating table, and the rotating table is driven by a servo motor to drive the height valve to move and adjust the position angle; the cylinder is connected to an external air source, and air is supplied to the cylinder through an air pipe, which drives the finger clamp cylinder joint to quickly connect to the height valve air hole, and drives the double-rod cylinder to grasp and clamp the height valve dial shaft accurately.

2. The automatic adjustment and rapid positioning device for the height valve stem according to claim 1 is characterized in that When the height valve is assembled except the height valve stem, the operator installs the height valve on the rotating table and fixes the horizontal rod on the rod fixing tooling. At this time, the bolts on the horizontal rod are not tightened, and the horizontal rod and the dial shaft are in a relatively rotatable state. Set the selection button to the corresponding position according to the height valve model, click the start button, and the PLC programmable logic controller controls the corresponding solenoid valve according to the loaded program logic to extend cylinder A, cylinder B, and cylinder C, and joints A, B, and C are pressed against the three corresponding ports of the height valve. Since there are sealing gaskets on the joints, the joints and the height valve form a closed air path.

3. The automatic adjustment and rapid positioning device for the height valve stem according to claim 2 is characterized in that First, the solenoid valve corresponding to the rear clamping jaw cylinder is energized, and the clamping jaw clamps the height valve dial shaft. Then the solenoid valve corresponding to the locking mechanism is energized, so that the locking mechanism locks the clamping jaw. This clamping process realizes electric-pneumatic rapid automatic control.

4. The automatic adjustment and rapid positioning device for the height valve stem according to claim 3 is characterized in that After the locking mechanism locks the clamping jaws, the PLC programmable logic controller sends a control signal to the servo controller to drive the servo motor. The dividing plate drives the rotary table to start rotating, causing the height valve dial shaft and the height valve body to rotate. At the same time, the solenoid valve is controlled to supply air to connector A. The PLC programmable controller detects the pressure sensor connected to the air outlet of the height valve in real time. When the pressure of the pressure sensor rises to the set value, the servo motor stops working. At the same time, the indicator light on the operating table turns green and stays on. The worker uses a torque wrench to tighten the fastening bolts on the horizontal rod of the height valve, marks it with an anti-loosening mark, and clicks the stop button.

5. The automatic adjustment and rapid positioning device for the height valve stem according to claim 4 is characterized in that The PLC programmable controller controls the servo motor to rotate in the opposite direction. The indicator light of the motor keeps flashing during operation until the height valve reaches the initial position and stops rotating. After that, the indicator light goes out, the solenoid valve of the control joint A stops supplying air, and cylinders A, B, and C retract.

6. The automatic adjustment and rapid positioning device for the height valve stem according to claim 5 is characterized in that The air source is energized through the pressure regulating valve to control the solenoid valve and continuously supply air to the air inlet of the height valve through connector A. When the height valve body rotates in the inflation direction through the servo motor and the height valve shift shaft, the air inlet valve of the height valve opens to realize inflation. When the outlet pressure reaches the set value, the servo motor stops working.

7. The automatic adjustment and rapid positioning device for the valve stem of a height valve according to claim 6, characterized in that The selection switch corresponds to two models of height valves, the L type can rotate clockwise, and the R type can rotate counterclockwise. Different models have different rotation directions set in the PLC programmable controller program, and the maximum rotation angle is set in the program.

8. The automatic adjustment and rapid positioning device for the valve stem of a height valve according to claim 4 or 6, characterized in that The set value is 20kpa.

9. The automatic adjustment and rapid positioning device for the valve stem of a height valve according to claim 5, characterized in that The air outlet of the pressure regulating valve is connected to the air inlet of each two-position three-way solenoid valve, and the air outlet of each two-position three-way solenoid valve is connected to each cylinder respectively.

10. The automatic adjustment and rapid positioning device for the valve stem of a height valve according to claim 1, characterized in that The front end of the cylinder is equipped with a sliding mechanism. After the cylinder is inflated, the sliding block is pushed out to drive the clamping assembly to work. The sliding mechanism includes a sliding rod axially arranged on the height valve air hole and a sliding block vertically arranged on the height valve dial shaft.

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