Triple-eccentric valve sealing surface displacement detection device and detection method

Abstract

The invention discloses a three-eccentric valve sealing surface displacement detection device and method, the three-eccentric valve sealing surface displacement detection device comprises a cross beam, a fixed seat and a displacement detection assembly, the displacement detection assembly is detachably installed on the fixed seat through a detection plate, and the fixed seat is detachably installed on the cross beam. The displacement detection assembly is divided into an auxiliary lifting detection mechanism and a translation detection mechanism. The auxiliary lifting detection mechanism comprises an auxiliary lifting displacement sensor, a clamping block and a locking block. The auxiliary lifting displacement sensor is fixedly installed on the detection rod through the clamping block and the locking block. The device can track the traverse position track of the sealing surface of the three-eccentric valve and record the traverse position track to a system for storage, so that automatic cladding operation of the sealing surface of the three-eccentric valve is realized, meanwhile, the device is good in detection precision and stability, and the welding quality of a weldment is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of automated cladding, and in particular to a triple-eccentric valve sealing surface displacement detection device and detection method. Background Art

[0002] The sealing surface of existing triple-eccentric valves is mostly welded manually, which not only has low welding efficiency and wastes 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 carry out automated welding of the sealing surface.

[0003] A triple-eccentric valve is one in which the valve stem axis deviates from both the center of the 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-eccentricity of the valve body, the sealing surface gradually tilts during valve rotation. Automated cladding of the sealing surface requires a horizontal weld pool, so a dual-axis positioner is required to tilt and adjust the angle until the sealing surface reaches a horizontal state.

[0004] As can be seen from the above description, the automated cladding operation of the sealing surface requires the coordinated operation of the rotating axis and the flip axis of the dual-axis positioner to ensure the horizontal state of the sealing surface. When the rotating axis and the flip axis work together to ensure the horizontal state of the sealing surface, the sealing surface will produce relative displacement changes in the lifting and translation directions. Only by detecting the displacement trajectory of the sealing surface during this operation and making the plasma cladding gun follow the trajectory can the automated cladding operation of the sealing surface of the triple-eccentric valve be achieved. The lifting displacement trajectory can be detected by arc pressure, but the lateral displacement trajectory requires a detection mechanism. Therefore, a triple-eccentric valve sealing surface displacement detection device and detection method are needed. Summary of the Invention

[0005] The object of the present invention is to provide a triple-eccentric valve sealing surface displacement detection device and detection method with a simple overall structure, good applicability and low cost, so as to solve the problems raised in the above background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A triple-eccentric valve sealing surface displacement detection device comprises a crossbeam, a fixing seat and a displacement detection assembly. The displacement detection assembly is detachably mounted on the fixing seat via a detection plate, and the fixing seat is detachably mounted on the crossbeam.

[0008] Preferably, the displacement detection assembly is divided into an auxiliary lifting detection mechanism and a translation detection mechanism.

[0009] Preferably, the auxiliary lifting detection mechanism includes an auxiliary lifting displacement sensor, a clamping block and a locking block, and the auxiliary lifting displacement sensor is fixedly mounted on the detection rod through the clamping block and the locking block.

[0010] Preferably, the translation detection mechanism includes a linear guide, a detection rod, a cylindrical detection block, a sensor fixing block, a translation displacement sensor, a hanging block, a pulley support, a pulley, a counterweight block, and a wire rope. The linear guide is installed on the detection plate, the cylindrical detection block is fixedly installed on the front end of the linear guide, and a through hole is provided on the cylindrical detection block. The detection rod passes through the through hole provided on the cylindrical detection block and is fastened to the cylindrical detection block. The hanging block is fixedly provided on the end end of the linear guide, the translation displacement sensor is arranged between the cylindrical detection block and the hanging block, and is fixedly installed on the sensor fixing block. The pulley support is fixedly installed on the front bottom of the beam and is arranged on the left side of the hanging block. The pulley is rotatably installed on the pulley support. The wire rope is arranged in the groove of the pulley, and one end is connected to the counterweight block, and the other end is connected to the hanging block.

[0011] The displacement detection method using the above-mentioned triple-eccentric valve sealing surface displacement detection device includes the following steps:

[0012] 1) Install the triple eccentric valve, move the lowest point (flat point) to the bottom of the positioner, and at the same time, position the screen at the zero point of rotation;

[0013] 2) Fill in the eccentric angle, switch the function to the rotation and flip coordinated action mode, move the three-eccentric valve sealing surface displacement detection device close to the cladding welding surface, and start position detection and recording; the recording method is to read the horizontal X-axis position coordinate every time the rotation axis rotates one degree. After one rotation, 360 coordinate points are detected and recorded;

[0014] 3) After detection, the three-eccentric valve sealing surface displacement detection device is recovered and the workpiece is rotated back to the zero point.

[0015] Preferably, the specific operation of moving the three-eccentric valve sealing surface displacement detection device to the cladding welding surface as described in step 2) is as follows: before the detection begins, the counterweight block is placed on the beam, the displacement detection assembly is moved to the cladding welding surface, the bottom of the auxiliary lifting displacement sensor is pressed against the sealing surface, and the bottom of the detection rod is pressed against the edge of the sealing surface. At this time, the counterweight block is removed and placed in the air. Under the action of gravity, the bottom of the detection rod is tightly pressed against the edge of the sealing surface.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] (1) The triple-eccentric valve sealing surface displacement detection device of the present invention has a reasonable overall design. By utilizing the displacement detection component, the lateral displacement position trajectory of the triple-eccentric valve sealing surface can be accurately detected and recorded in the system for storage. The overall structure is simple, the applicability is good, the cost is low, and there is great application prospect.

[0018] (2) The displacement detection method of the triple-eccentric valve sealing surface of the present invention realizes the automated cladding operation of the triple-eccentric valve sealing surface, replacing the traditional manual cladding, with fast cladding speed and high production efficiency;

[0019] (3) The displacement detection method of the triple-eccentric valve sealing surface of the present invention has good detection accuracy and stability, improves the weld formation quality, greatly improves the welding quality, and saves alloy materials at the same time, and has great application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0021] In the figure: 1-crossbeam; 2-fixed seat; 3-displacement detection assembly; 4-detection plate; 5-linear guide; 6-detection rod; 7-cylindrical detection block; 8-auxiliary lifting displacement sensor; 9-clamping block; 10-locking block; 11-sensor fixing block; 12-translational displacement sensor; 13-hanging block; 14-pulley support; 15-pulley; 16-counterweight block; 17-wire rope. DETAILED DESCRIPTION

[0022] The technical solution of this patent is further described in detail below in conjunction with specific implementation methods.

[0023] See also Figure 1A triple-eccentric valve sealing surface displacement detection device includes a crossbeam 1, a fixed seat 2, and a displacement detection assembly 3. The displacement detection assembly 3 is detachably mounted on the fixed seat 2 via a detection plate 4, and the fixed seat 2 is detachably mounted on the crossbeam 1. The displacement detection assembly 3 is divided into an auxiliary lift detection mechanism and a translation detection mechanism. The auxiliary lift detection mechanism includes an auxiliary lift displacement sensor 8, a clamping block 9, and a locking block 10. The auxiliary lift displacement sensor 8 is fixedly mounted on the detection rod 6 via the clamping block 9 and the locking block 10. When no arc voltage is generated, the auxiliary lift detection mechanism is required to detect lift displacement changes. 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 hanging block 13, a pulley support 14, a pulley 15, a counterweight block 16, and a wire rope 17. The linear guide rail 5 is installed on the detection plate 4, and the cylindrical detection block 7 is fixedly installed on the front end of the linear guide rail 5. In addition, a through hole is provided on the cylindrical detection block 7. The detection rod 6 passes through the through hole provided on the cylindrical detection block 7 and is fastened to it. The hanging block 13 is fixedly provided on the terminal end of the linear guide rail 5. The translation displacement sensor 12 is arranged between the cylindrical detection block 7 and the hanging block 13 and is fixedly mounted on the sensor fixing block 11. The pulley support 14 is fixedly mounted on the front bottom of the crossbeam 1 and arranged on the left side of the hanging block 13. The pulley 15 is rotatably mounted 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 hanging block 13. The counterweight block 16 is added to ensure that the bottom of the detection rod 4 always contacts the edge of the sealing surface during the process of detecting the lateral movement trajectory of the sealing surface. The auxiliary lifting displacement sensor 8 can be telescopically moved in the vertical direction, and the linear guide 5 can be telescopically moved in the horizontal direction.

[0024] The displacement detection method using the above-mentioned triple-eccentric valve sealing surface displacement detection device includes the following steps:

[0025] 1) Install the triple eccentric valve, move the lowest point (flat point) to the bottom of the positioner, and at the same time, position the screen at the zero point of rotation;

[0026] 2) Fill in the eccentric angle, switch the function to the rotation and flip coordinated action mode, move the three-eccentric valve sealing surface displacement detection device close to the cladding welding surface, and start position detection and recording; the recording method is to read the horizontal X-axis position coordinate every time the rotation axis rotates one degree. After one rotation, 360 coordinate points are detected and recorded;

[0027] 3) After detection, the three-eccentric valve sealing surface displacement detection device is recovered and the workpiece is rotated back to the zero point.

[0028] The specific operation of moving the three-eccentric valve sealing surface displacement detection device to the cladding welding surface as described in step 2) is as follows: before the detection begins, the counterweight block 16 is placed on the crossbeam, the displacement detection assembly 3 is moved to the cladding welding surface, the bottom of the auxiliary lifting displacement sensor 8 is pressed against the sealing surface, and the bottom of the detection rod 6 is pressed against the edge of the sealing surface. At this time, the counterweight block 16 is removed and placed in the air. Under the action of gravity, the bottom of the detection rod 6 is tightly pressed against the edge of the sealing surface.

[0029] The present invention is mainly used for detecting the lateral displacement trajectory of the sealing surface and recording it in the system for storage before welding operation when no arc pressure is generated, thereby realizing the automated cladding operation of the sealing surface of the triple-eccentric valve, replacing the traditional manual cladding, with fast cladding speed and high production efficiency.

Claims

1. A triple eccentric valve sealing surface displacement detection device, characterized by: It comprises a crossbeam (1), a fixing seat (2) and a displacement detection assembly (3); the displacement detection assembly (3) is detachably mounted on the fixing seat (2) via a detection plate (4); and the fixing seat (2) is detachably mounted on the crossbeam (1).

2. The triple-eccentric valve sealing surface displacement detection device according to claim 1, characterized in that: The displacement detection assembly (3) is divided into an auxiliary lifting detection mechanism and a translation detection mechanism.

3. The triple-eccentric valve sealing surface displacement detection device according to claim 2, characterized in that: The auxiliary lifting detection mechanism comprises 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 the detection rod (6) via the clamping block (9) and the locking block (10).

4. The triple-eccentric valve sealing surface displacement detection device according to claim 2, characterized in that: The translation detection mechanism comprises 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 hanging block (13), a pulley support (14), a pulley (15), a counterweight block (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). A through hole is provided on the cylindrical detection block (7). The detection rod (6) passes through the through hole provided on the cylindrical detection block (7) and is fastened to the cylindrical detection block (7). The linear guide rail (5) is connected to the suspension block (13), the suspension block (13) is fixedly arranged at the end of the linear guide rail (5), the translation displacement sensor (12) is arranged between the cylindrical detection block (7) and the suspension block (13), and is fixedly installed on the sensor fixing block (11), the pulley support (14) is fixedly installed on the front bottom of the crossbeam (1), and is arranged on the left side of the suspension 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 suspension block (13).

5. A displacement detection method using the triple eccentric valve sealing surface displacement detection device according to any one of claims 1 to 4, characterized in that: The steps include: 1) Install the triple eccentric valve, move the lowest point (flat point) to the bottom of the positioner, and at the same time, position the screen at the zero point of rotation; 2) Fill in the eccentric angle, switch the function to the rotation and flip coordinated action mode, move the three-eccentric valve sealing surface displacement detection device close to the cladding welding surface, and start position detection and recording; the recording method is to read the horizontal X-axis position coordinate every time the rotation axis rotates one degree. After one rotation, 360 coordinate points are detected and recorded; 3) After detection, the three-eccentric valve sealing surface displacement detection device is recovered and the workpiece is rotated back to the zero point.

6. The displacement detection method of the triple-eccentric valve sealing surface displacement detection device according to claim 5, characterized in that: The specific operation of moving the displacement detection device of the sealing surface of the three-eccentric valve close to the cladding welding surface in step 2) is as follows: before the detection begins, the counterweight block (16) is placed on the crossbeam, the displacement detection assembly (3) is moved close to the cladding welding surface, the bottom of the auxiliary lifting displacement sensor (8) is pressed against the sealing surface, and the bottom of the detection rod (6) is pressed against the edge of the sealing surface. At this time, the counterweight block (16) is removed and placed in the air. Under the action of gravity, the bottom of the detection rod (6) is tightly pressed against the edge of the sealing surface.

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