A device for detecting the displacement of the sealing surface of a triple-eccentric valve

Abstract

This utility model discloses a displacement detection device for the sealing surface of a triple-eccentric valve, including a crossbeam, a fixed base, and a displacement detection assembly. The displacement detection assembly is detachably mounted on the fixed base via a detection plate, and the fixed base is detachably mounted on the crossbeam. The displacement detection assembly is divided into an auxiliary lifting detection mechanism and a translation detection mechanism. The auxiliary lifting detection mechanism includes an auxiliary lifting displacement sensor, a clamping block, and a locking block. The auxiliary lifting displacement sensor is fixedly mounted on the detection rod via the clamping block and the locking block. This utility model can track the lateral displacement trajectory of the sealing surface of a triple-eccentric valve and record it to the system for storage, thereby realizing automated cladding operations on the sealing surface of triple-eccentric valves. Furthermore, this utility model has good detection accuracy and stability, thus improving the welding quality of the weldment.

Description

Technical Field

[0001] This utility model relates to the field of automated cladding technology, specifically a displacement detection device for the sealing surface of a triple-eccentric valve. Background Technology

[0002] Currently, the sealing surface welding of triple eccentric valves is mostly done manually, which is not only inefficient and wasteful of alloy materials, but also reduces the efficiency of subsequent machining of the sealing surface. Therefore, in order to improve welding efficiency, save alloy materials, and improve welding quality, it is necessary to automate the welding of the sealing surface.

[0003] Triple-eccentric valves refer to valves where the valve stem axis is simultaneously offset from both the center of the valve seat sealing surface and the center of the valve body, and the valve seat rotation axis is at a certain angle to the valve body passage axis. Due to this unique triple-eccentric characteristic of the valve body, the sealing surface gradually tilts during valve rotation. Automated cladding of the sealing surface requires ensuring the molten pool is horizontal, thus necessitating a dual-axis positioner to rotate and adjust the angle until the sealing surface reaches a horizontal state.

[0004] As described above, automated cladding of the sealing surface requires the coordinated operation of the rotary and tilting axes of a dual-axis positioner to ensure the sealing surface remains horizontal. When the rotary and tilting axes work together to maintain the horizontal state of the sealing surface, the sealing surface will experience relative displacement changes in the lifting and translating directions. Only by detecting the displacement trajectory of the sealing surface during this operation, and allowing the plasma welding torch to follow the trajectory, can automated cladding of the triple-eccentric valve sealing surface be achieved. While the lifting displacement trajectory can be detected using arc pressure, the translating displacement trajectory requires a detection mechanism. Therefore, a displacement detection device and method for triple-eccentric valve sealing surfaces are needed. Utility Model Content

[0005] The purpose of this invention is to provide a displacement detection device for the sealing surface of a triple-eccentric valve that has a simple overall structure, good applicability, and low cost, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A displacement detection device for the sealing surface of a triple-eccentric valve includes a crossbeam, a fixed base, and a displacement detection assembly. The displacement detection assembly is detachably mounted on the fixed base via a detection plate, and the fixed base is detachably mounted on the crossbeam. The displacement detection assembly is divided into an auxiliary lifting detection mechanism and a translation detection mechanism. The auxiliary lifting detection mechanism includes an auxiliary lifting displacement sensor, a clamping block, and a locking block.

[0008] Preferably, the auxiliary lifting displacement sensor is fixedly installed on the probe rod by a clamping block and a locking block.

[0009] Preferably, the translation detection mechanism includes a linear guide rail, a detection rod, a cylindrical detection block, a sensor fixing block, a translation displacement sensor, a lifting block, a pulley support, a pulley, a counterweight, and a wire rope. The linear guide rail is mounted on a detection plate. The cylindrical detection block is fixedly mounted on the front end of the linear guide rail. The cylindrical detection block has a through hole, through which the detection rod passes and is securely connected. The lifting block is fixedly mounted on the end of the linear guide rail. The translation displacement sensor is arranged between the cylindrical detection block and the lifting block and fixedly mounted on the sensor fixing block. The pulley support is fixedly mounted on the bottom front of the crossbeam and arranged on the left side of the lifting block. The pulley is rotatably mounted on the pulley support. The wire rope is arranged in the groove of the pulley, with one end connected to the counterweight and the other end connected to the lifting block.

[0010] Compared with the prior art, the beneficial effects of this utility model are:

[0011] This utility model discloses a displacement detection device for the sealing surface of a triple-eccentric valve. Its overall design is reasonable. Utilizing displacement detection components, it can accurately detect the lateral displacement trajectory of the sealing surface of a triple-eccentric valve and record it to the system for storage. The device features a simple overall structure, good applicability, and low cost, making it highly promising for application. It achieves automated cladding operations on the sealing surface of triple-eccentric valves, replacing traditional manual welding. The cladding speed is fast, production efficiency is high, detection accuracy and stability are good, and the weld formation quality is improved, significantly enhancing welding quality. Simultaneously, it saves alloy materials, making it highly promising for application. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0013] In the diagram: 1-Crossbeam; 2-Fixed seat; 3-Displacement detection assembly; 4-Detection plate; 5-Linear guide rail; 6-Detection rod; 7-Cylindrical detection block; 8-Auxiliary lifting displacement sensor; 9-Clamping block; 10-Locking block; 11-Sensor fixing block; 12-Translation displacement sensor; 13-Lifting block; 14-Pulley support; 15-Pulley; 16-Counterweight block; 17-Wire rope. Detailed Implementation

[0014] The technical solution of this patent will be further described in detail below with reference to specific embodiments.

[0015] Please see Figure 1A displacement detection device for a triple-eccentric valve sealing surface includes a crossbeam 1, a fixed base 2, and a displacement detection assembly 3. The displacement detection assembly 3 is detachably mounted on the fixed base 2 via a detection plate 4, and the fixed base 2 is detachably mounted on the crossbeam 1. The displacement detection assembly 3 is divided into an auxiliary lifting detection mechanism and a translation detection mechanism. The auxiliary lifting detection mechanism includes an auxiliary lifting displacement sensor 8, a clamping block 9, and a locking block 10. The auxiliary lifting displacement sensor 8 is fixedly mounted on a detection rod 6 via the clamping block 9 and the locking block 10. When no arc voltage is generated, the auxiliary lifting detection mechanism is needed to detect changes in lifting displacement. The translation detection mechanism includes a linear guide rail 5, a detection rod 6, a cylindrical detection block 7, a sensor fixing block 11, a translation displacement sensor 12, a lifting block 13, a pulley support 14, a pulley 15, a counterweight 16, and a wire rope 17. The linear guide rail 5 is mounted on the detection plate 4. The cylindrical detection block 7 is fixedly mounted on the front end of the linear guide rail 5. The cylindrical detection block 7 has a through hole through which the detection rod 6 passes and is securely connected. The lifting block 13 is fixedly mounted on the end of the linear guide rail 5. The translational displacement sensor 12 is arranged between the cylindrical detection block 7 and the hanging block 13, and is fixedly installed on the sensor fixing block 11. The pulley support 14 is fixedly installed on the bottom front of the crossbeam 1 and arranged on the left side of the hanging block 13. The pulley 15 is rotatably installed on the pulley support 14. The wire rope 17 is arranged in the groove of the pulley 15, with one end connected to the counterweight 16 and the other end connected to the hanging block 13. The counterweight 16 is added to ensure that the bottom of the detection rod 4 always rests against the edge of the sealing surface during the detection of the transverse trajectory of the sealing surface. The auxiliary lifting displacement sensor 8 can extend and retract in the vertical direction, and the linear guide rail 5 can extend and retract in the horizontal direction.

[0016] The displacement detection method using the above-mentioned triple eccentric valve sealing surface displacement detection device includes the following steps:

[0017] 1) Install a triple eccentric valve to move the lowest point (plane point) to the bottom of the positioner, while simultaneously positioning the zero point on the screen.

[0018] 2) Fill in the eccentricity angle, switch the function to the rotation and flipping coordinated action mode, move the displacement detection device of the three eccentric valve sealing surface to the cladding welding surface, and start the position detection and recording; the recording method is to read the horizontal X-axis position coordinates for each rotation axis one degree, and after one rotation, detect and record 360 coordinate points.

[0019] 3) After detection, retrieve the displacement detection device for the sealing surface of the eccentric valve and rotate the workpiece back to zero.

[0020] The specific operation of moving the displacement detection device of the triple eccentric valve sealing surface to the cladding welding surface in step 2) is as follows: Before the detection begins, the counterweight 16 is placed on the crossbeam, the displacement detection component 3 is moved to the cladding welding surface, the bottom of the auxiliary lifting displacement sensor 8 is placed against the sealing surface, and the bottom of the detection rod 6 is placed against the edge of the sealing surface. At this time, the counterweight 16 is removed and placed in the air. Under the action of gravity, the bottom of the detection rod 6 is pressed tightly against the edge of the sealing surface.

[0021] This invention is mainly used to detect the lateral displacement trajectory of the sealing surface before welding operations, when no arc pressure is generated, and record it to the system for storage, thereby realizing the automated cladding operation of the sealing surface of the triple eccentric valve, replacing the traditional manual welding, with fast cladding speed and high production efficiency.

Claims

1. A device for detecting the displacement of the sealing surface of a triple-eccentric valve, characterized in that: It includes a crossbeam (1), a fixed base (2), and a displacement detection component (3). The displacement detection component (3) is detachably mounted on the fixed base (2) via a detection plate (4). The fixed base (2) is detachably mounted on the crossbeam (1). The displacement detection component (3) is divided into an auxiliary lifting detection mechanism and a translation detection mechanism. The auxiliary lifting detection mechanism includes an auxiliary lifting displacement sensor (8), a clamping block (9), and a locking block (10).

2. The triple offset valve sealing surface displacement detection device of claim 1, wherein, The auxiliary lifting displacement sensor (8) is fixedly installed on the probe rod (6) by the clamping block (9) and the locking block (10).

3. The triple offset valve sealing surface displacement detection device of claim 1, wherein: The translation detection mechanism includes a linear guide rail (5), a detection rod (6), a cylindrical detection block (7), a sensor fixing block (11), a translation displacement sensor (12), a lifting block (13), a pulley support (14), a pulley (15), a counterweight (16), and a wire rope (17). The linear guide rail (5) is mounted on the detection plate (4), and the cylindrical detection block (7) is fixedly mounted on the front end of the linear guide rail (5). The cylindrical detection block (7) has a through hole, through which the detection rod (6) passes and is fastened. The connection is as follows: the lifting block (13) is fixedly set at the end of the linear guide rail (5); the translational displacement sensor (12) is arranged between the cylindrical detection block (7) and the lifting block (13) and is fixedly installed on the sensor fixing block (11); the pulley support (14) is fixedly installed on the bottom front of the crossbeam (1) and arranged on the left side of the lifting block (13); the pulley (15) is rotatably installed on the pulley support (14); the wire rope (17) is arranged in the groove of the pulley (15), and one end is connected to the counterweight block (16) and the other end is connected to the lifting block (13).

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