A valve shell is provided with a surrounding type electric control segmented detection device

Abstract

The application relates to the technical field of valve shell detection, in particular to a surrounding type electric control segmented detection device for valve shells, which comprises a detection rack and an electric control material conveying belt installed on the detection rack, at least two groups of electric control lifting mechanisms are fixedly assembled on the upper surface of the detection rack and located outside the electric control material conveying belt, and each electric control lifting mechanism is composed of two longitudinally arranged guide rails and a screw rod lifting seat arranged in the guide rails. The surrounding type electric control segmented detection device for valve shells can realize automatic conveying of the valve shells through the electric control material conveying belt, manual carrying is not needed, and the detection efficiency is improved; the height of the annular guide rail can be adjusted through the at least two groups of electric control lifting mechanisms, the electric control adjusting frame can drive the detection module to slide along the annular guide rail, the interval of the electric control telescopic clamping arms is adjusted, the valve shells of different specifications and different sizes can be detected, and the application range is wide.

Description

Technical Field

[0001] This invention relates to the field of valve shell testing technology, and in particular to a surround-type electrically controlled segmented testing device for valve shells. Background Technology

[0002] The valve body is the core pressure-bearing component of an industrial valve. It encloses the internal valve core, stem, and other components, providing a channel for media flow and bearing the system's operating pressure. Its structural integrity and sealing performance directly determine the valve's operational safety. Valve bodies are widely used in petrochemical, power, and other fields. They are typically made of cast steel or stainless steel through casting or forging. During production, defects such as surface cracks, porosity, and poor sealing can easily occur, potentially leading to media leakage, equipment damage, or even safety accidents. Therefore, surface and sealing performance testing is essential during the production process.

[0003] Currently, the testing methods available on the market are mainly divided into two categories: surface testing, which primarily uses magnetic particle testing and penetrant testing. Magnetic particle testing is only suitable for ferromagnetic materials, while penetrant testing can detect surface opening defects but cannot identify near-surface defects. Sealing testing mainly uses hydrostatic testing and airtightness testing, which determine compliance by observing leakage under pressure. In addition, ultrasonic testing and radiographic testing are also used to assist in the detection of internal defects, but they are mostly used for sampling inspections.

[0004] Existing testing methods have significant drawbacks: magnetic particle testing has limited applicability; penetrant testing is cumbersome and prone to environmental pollution; hydrostatic testing consumes a large amount of water, has a long testing cycle, and residual moisture can easily lead to valve shell corrosion; airtightness testing has low accuracy in identifying minute leaks and poses safety hazards; ultrasonic testing relies on operator experience and is prone to missed detections; and radiographic testing poses radiation hazards and has weak ability to identify planar defects. These shortcomings result in low testing efficiency and insufficient accuracy, making it difficult to meet the high-efficiency and precise testing requirements of large-scale production. Therefore, a new testing technology is urgently needed to solve these problems. Summary of the Invention

[0005] The technical problem to be solved by the present invention is that the valve shell detection efficiency is low, the accuracy is insufficient, the scope of application is limited, and the operation is cumbersome.

[0006] The technical solution adopted by the present invention to solve its technical problem is: a valve body surround-type electrically controlled segmented inspection device, including an inspection frame and an electrically controlled conveyor belt installed on the inspection frame. At least two sets of electrically controlled lifting mechanisms are fixedly assembled on the upper surface of the inspection frame outside the electrically controlled conveyor belt. The electrically controlled lifting mechanism consists of two symmetrically arranged longitudinal guide rails and a lead screw lifting seat located inside the longitudinal guide rails. An annular guide rail is provided inside the electrically controlled lifting mechanism. A modular detachable inspection module is provided inside the annular guide rail. The modular detachable inspection module includes a surface inspection module and a sealing inspection module, which can realize the simultaneous inspection of valve body surface defects and sealing performance, and facilitates later maintenance and module replacement.

[0007] The lead screw lifting seat includes a longitudinal lead screw movably mounted inside the longitudinal guide rail and an internal thread lifting seat threaded onto the longitudinal lead screw. The lower end of the longitudinal lead screw is fixedly connected to the output end of the drive motor. The drive motor is embedded inside the detection frame. The drive motor drives the longitudinal lead screw to rotate, thereby driving the internal thread lifting seat to move up and down along the longitudinal guide rail, realizing the height adjustment of the annular guide rail and adapting to the detection of valve bodies of different height specifications.

[0008] The annular guide rail is fixedly assembled with the internally threaded lifting seat via a mounting slot on its outer arc-shaped surface. The mounting slot and the internally threaded lifting seat are locked together with fastening bolts to ensure a stable installation of the annular guide rail and prevent shaking during testing that could affect accuracy. Inside the annular guide rail is a movable electrically controlled adjustment frame for adjusting the modular, detachable testing module. This frame can slide along the circumference of the annular guide rail, enabling segmented, circumferential testing of the valve body.

[0009] The electrically controlled adjustment frame includes an annular assembly frame that slides inside the annular guide rail, a top-mounted adjustment motor fixed to the upper end of the annular guide rail, and an electrically controlled telescopic clamping arm that is movably installed inside the annular assembly frame. The top-mounted adjustment motor is a servo motor, which meshes with the embedded annular internal gear ring on the annular assembly frame through the adjustment gear on the bottom rotating shaft. This allows for precise adjustment of the rotation angle of the annular assembly frame, thereby driving the detection module to perform segmented detection. The electrically controlled telescopic clamping arm can adjust the clamping distance according to the outer diameter specification of the valve body, ensuring a tight fit between the detection module and the valve body surface, thus improving detection accuracy.

[0010] The electrically controlled telescopic clamping arm includes an arc-shaped first flipping arm, an arc-shaped second flipping arm, a first electrically controlled support rod, a second electrically controlled support rod, an arc-shaped assembly frame, an adjusting slider slidably installed inside the arc-shaped assembly frame, and a compression spring. The outer ends of the arc-shaped first flipping arm and the arc-shaped second flipping arm are inserted into the arc-shaped assembly frame and movably hinged to the adjusting slider. The first electrically controlled support rod and the second electrically controlled support rod are both electrically telescopic rods, and their extended ends are respectively hinged to the inner sides of the arc-shaped first flipping arm and the arc-shaped second flipping arm. The flipping arm is flipped by the extension and retraction of the electrically controlled support rod, thereby realizing the adjustment of the clamping distance. The compression spring is a stainless steel compression spring installed inside the arc-shaped assembly frame. It can press the adjusting slider to the sides to slide back to the center position of the arc-shaped assembly frame to ensure accurate reset of the flipping arm after adjustment.

[0011] An external optical positioning module, including a CCD camera and a positioning sensor, is installed on the side wall of the longitudinal guide rail. This module is used to accurately position the valve shells conveyed on the electrically controlled conveyor belt, ensuring alignment between the detection module and the corresponding valve shell position, thus preventing missed or incorrect detections. Embedded LED lights for supplementary lighting are fixedly installed on the inner arc-shaped surface of the arc-shaped assembly frame. These embedded LED lights are evenly distributed along the circumference of the arc-shaped assembly frame, providing sufficient illumination and improving the accuracy of the surface detection module in identifying minute defects. The first arc-shaped tilting arm and the first electrically controlled support rod are offset, and the second arc-shaped tilting arm and the second electrically controlled support rod are also offset, with an angle of 30-45°, ensuring smooth tilting and adjustment and preventing jamming during the adjustment process.

[0012] The beneficial effects of this invention are: (1) The present invention provides a valve body surround-type electrically controlled segmented detection device, which realizes the automated conveying of valve bodies through an electrically controlled conveyor belt, eliminating the need for manual handling and improving detection efficiency; (2) The height of the ring guide rail can be adjusted by at least two sets of electrically controlled lifting mechanisms. The electrically controlled adjustment frame can drive the detection module to slide along the ring guide rail. With the spacing adjustment of the electrically controlled telescopic clamping arm, it can be adapted to the detection of valve shells of different specifications and sizes, and has a wide range of applications. (3) The modular and detachable inspection module can simultaneously detect surface defects and sealing performance without the need for step-by-step operation, thus further improving inspection efficiency; (4) The positioning accuracy is ensured by the external optical positioning module, the defect identification accuracy is improved by the embedded LED light, the overall structure adopts automatic electronic control drive, reduces the dependence on manual operation, avoids human misjudgment, solves the problems of low efficiency, insufficient accuracy and limited applicability of existing detection methods, meets the needs of efficient and accurate detection in large-scale production, and has a stable structure, convenient maintenance and strong practicality. Attached Figure Description

[0013] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0014] Figure 1 This is a schematic diagram of the structure of the present invention.

[0015] Figure 2 This is a schematic diagram of the detection mechanism in this invention.

[0016] Figure 3 This is a schematic diagram of the structure under the detection state in this invention.

[0017] Figure 4 This is a schematic diagram of the structure for adjusting the transmission position of the gear and the embedded annular internal gear ring in this invention.

[0018] In the diagram: 1. Inspection frame; 2. Electrically controlled conveyor belt; 3. Electrically controlled lifting mechanism; 4. Longitudinal guide rail; 5. Screw lifting seat; 6. Circular guide rail; 7. Modular detachable inspection module; 8. Longitudinal screw; 9. Internal thread lifting seat; 10. Mounting slot; 11. Fastening bolt; 12. Electrically controlled adjustment frame; 13. Circular assembly frame; 14. Top-mounted adjustment motor; 15. Electrically controlled telescopic clamping arm; 16. Adjusting gear; 17. Embedded circular internal gear ring; 18. Arc-shaped first tilting arm; 19. Arc-shaped second tilting arm; 20. First electrically controlled support rod; 21. Second electrically controlled support rod; 22. Arc-shaped assembly frame; 23. Adjusting slider; 24. Compression spring; 25. External optical positioning module; 26. Embedded LED light. Detailed Implementation

[0019] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the invention, and therefore only show the components relevant to the invention.

[0020] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0021] Figure 1 , Figure 2 , Figure 3 and Figure 4The valve body surround-type electrically controlled segmented detection device shown first clarifies the connection relationship of each core structure: the electrically controlled conveyor belt 2 is fixedly installed in the center of the upper surface of the detection frame 1 and electrically connected to the drive mechanism inside the detection frame 1, enabling start-stop and uniform speed conveying; at least two sets of electrically controlled lifting mechanisms 3 are symmetrically fixed on the upper surface of the detection frame 1 and the outside of the electrically controlled conveyor belt 2, and the two longitudinal guide rails 4 of each set of electrically controlled lifting mechanisms 3 are vertically fixed on the detection frame 1, the screw lifting seat 5 is movably embedded in the longitudinal guide rail 4, the lower end of the longitudinal screw 8 is fixedly connected to the output end of the drive motor embedded in the detection frame 1, the internal thread lifting seat 9 is threaded onto the longitudinal screw 8, and the annular guide rail 6 is engaged with the internal thread lifting seat 9 through the outer mounting groove 10, and through... Fastening bolt 11 is tightened to achieve a fixed connection with the electric lifting mechanism 3; the electric adjustment frame 12 is slidably assembled on the inner side of the annular guide rail 6, the annular assembly frame 13 is slidably engaged with the sliding groove on the inner side of the annular guide rail 6, the top-mounted adjustment motor 14 is fixed on the upper end face of the annular guide rail 6, and its bottom rotating shaft is fixedly connected to the adjustment gear 16. The adjustment gear 16 meshes with the embedded annular internal gear ring 17 on the inner side of the annular assembly frame 13, the electric telescopic clamping arm 15 is hinged on the inner side of the annular assembly frame 13, the modular detachable detection module 7 is fixed on the inner end of the electric telescopic clamping arm 15, and the external optical positioning module 25 is fixed on the side wall of the longitudinal guide rail 4 and is electrically connected to the electric conveyor belt 2, the electric lifting mechanism 3, and the electric adjustment frame 12 to achieve signal linkage control.

[0022] Its complete working principle and process are as follows: First, the external optical positioning module 25 is activated, and its internal CCD camera captures images of the valve shell conveyed on the electrically controlled conveyor belt 2 in real time. The positioning sensor synchronously collects the position data of the valve shell and transmits the image and position data to the control unit. The control unit analyzes and processes the data to accurately determine whether the valve shell has reached the preset detection position directly below the annular guide rail 6. When the valve shell is detected to have reached the designated position, the control unit immediately sends a control signal to stop the electrically controlled conveyor belt 2, thus completing the precise positioning of the valve shell.

[0023] After positioning is complete, the control unit activates the electrically controlled lifting mechanism 3. The drive motor embedded inside the detection frame 1 drives the longitudinal lead screw 8 to rotate at a constant speed. Due to the threaded engagement between the internal thread lifting seat 9 and the longitudinal lead screw 8, and the sliding limit between the internal thread lifting seat 9 and the longitudinal guide rail 4, the rotation of the longitudinal lead screw 8 is converted into the downward movement of the internal thread lifting seat 9 along the longitudinal guide rail 4. The internal thread lifting seat 9 drives the annular guide rail 6, the electrically controlled adjustment frame 12, and the modular detachable detection module 7 to descend synchronously until the optical detection module on the modular detachable detection module 7 is properly fitted to the upper surface of the valve body. At this time, the optical detection module is activated to perform a comprehensive optical scan detection of the upper surface of the valve body. Through image comparison, it identifies defects such as damage, openings, cracks, and pores on the surface of the valve body and accurately records the specific location of the defects, completing the detection work on the upper surface of the valve body.

[0024] After the upper surface inspection is completed, the control unit controls the drive motor of the electric lifting mechanism 3 to rotate in the opposite direction, which in turn drives the longitudinal lead screw 8 to rotate in the opposite direction. This drives the internal thread lifting seat 9 to move upward along the longitudinal guide rail 4, causing the modular detachable inspection module 7 to be lifted and reset until it moves to the height position corresponding to the openings on both sides of the valve body and stops. Subsequently, the control unit controls the electric telescopic clamping arm 15 to start, and the first electric support rod 20 and the second electric support rod 21 extend synchronously, driving the arc-shaped first flip arm 18 and the arc-shaped second flip arm 19 to flip towards the valve body. The arc-shaped first flip arm 18 and the arc-shaped second flip arm 19 drive the modular detachable inspection module 7 fixed at its outer end to move synchronously until the two modular detachable inspection modules 7 precisely fit into the openings on both sides of the valve body and are squeezed closed, achieving a seal on both sides of the valve body.

[0025] After the openings on both sides are sealed, the control unit controls the corresponding electric lifting mechanism 3 at the top to start and repeat the above lifting action, driving the upper annular guide rail 6, electric adjustment frame 12 and electric telescopic clamping arm 15 to descend until the modular detachable detection module 7 on the upper electric telescopic clamping arm 15 moves to the upper opening position of the valve body; then, the upper electric telescopic clamping arm 15 starts, and the first electric support rod 20 and the second electric support rod 21 drive the flipping arm to flip, driving the modular detachable detection module 7 to close the upper opening of the valve body, completing the complete sealing of the three openings of the valve body.

[0026] After sealing is completed, the control unit activates the gas supply component inside the modular detachable detection module 7 to uniformly input gas into the valve body. Simultaneously, the pressure sensor on the inner wall of the modular detachable detection module 7 is activated. The pressure sensor monitors the gas pressure changes inside the valve body in real time and transmits the pressure data to the control unit. The control unit continuously monitors the pressure data. If the pressure inside the valve body remains stable and does not drop significantly within the preset pressure holding time, it indicates that the valve body is airtight and has no leakage defects. If the pressure drops, it is determined that there is a leak in the valve body. At the same time, based on the rate and location of the pressure drop, the control unit helps to determine the location and degree of the leak, thus completing the valve body airtightness test.

[0027] After the airtightness test is completed, the control unit sends a reset signal, and each component resets in sequence: First, the upper electrically controlled telescopic clamping arm 15 resets, causing the modular detachable testing module 7 to loosen the upper opening of the valve shell; then, the upper electrically controlled lifting mechanism 3 starts, causing the upper annular guide rail 6 and related components to lift and reset; next, the two sides electrically controlled telescopic clamping arms 15 reset, causing the modular detachable testing module 7 to loosen the openings on both sides of the valve shell; finally, the two sides electrically controlled lifting mechanisms 3 start, causing the annular guide rail 6 and related components to lift and reset to the initial position, while the electrically controlled conveyor belt 2 starts, transporting the tested valve shell to the next process, and simultaneously transporting the next valve shell to be tested to the preset testing position, repeating the entire testing process to achieve large-scale, automated, and continuous testing of valve shells.

[0028] In this embodiment, the electrically controlled lifting mechanism 3 is configured in two groups, symmetrically distributed on both sides of the electrically controlled conveyor belt 2, to ensure the smooth lifting of the annular guide rail 6 and avoid tilting during the lifting process, which would affect the detection accuracy. The top-mounted adjusting motor 14 is a servo motor with high adjustment accuracy, which can accurately control the rotation angle of the annular assembly frame 13. Combined with the positioning signal of the external optical positioning module 25, it can achieve precise alignment between the modular detachable detection module 7 and various parts of the valve body. The compression spring 24 is a stainless steel compression spring, which is corrosion-resistant and has good elasticity. When the electrically controlled telescopic clamping arm 15 is reset, it can press the adjusting slider 23 to the sides to slide and reset, ensuring the precise reset of the arc-shaped first flipping arm 18 and the arc-shaped second flipping arm 19 and avoiding adjustment jamming. The embedded LED lights 26 are evenly distributed along the circumference of the arc-shaped assembly frame 22, providing uniform illumination and assisting the optical detection module in improving the recognition accuracy of small defects. The modular detachable detection module 7 is connected to the electrically controlled telescopic clamping arm 15 with detachable bolts, which facilitates the maintenance, calibration and replacement of the optical detection module, pressure sensor and gas delivery component in the later stage, reducing equipment maintenance costs.

[0029] Based on the above-described preferred embodiments of the present invention, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the inventive concept. The technical scope of this invention is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A surround-type electrically controlled segmented inspection device for valve bodies, comprising an inspection frame (1) and an electrically controlled conveyor belt (2) mounted on the inspection frame (1), characterized in that: At least two sets of electrically controlled lifting mechanisms (3) are fixedly mounted on the upper surface of the testing frame (1) outside the electrically controlled conveyor belt (2). The electrically controlled lifting mechanism (3) consists of two symmetrically arranged longitudinal guide rails (4) and a screw lifting seat (5) located inside the longitudinal guide rails (4). An annular guide rail (6) is provided inside the electrically controlled lifting mechanism (3). A modular detachable testing module (7) is provided inside the annular guide rail (6). The modular detachable testing module (7) includes a surface testing module and a sealing testing module.

2. The valve body surround-type electrically controlled segmented detection device according to claim 1, characterized in that: The lead screw lifting seat (5) includes a longitudinal lead screw (8) movably mounted inside the longitudinal guide rail (4) and an internal thread lifting seat (9) threaded onto the longitudinal lead screw (8). The lower end of the longitudinal lead screw (8) is fixedly connected to the output end of the drive motor, and the drive motor is embedded inside the detection frame (1).

3. The valve body surround-type electrically controlled segmented detection device according to claim 2, characterized in that: The annular guide rail (6) is fixedly assembled with the internal thread lifting seat (9) through the mounting slot (10) on the outer arc surface, and the mounting slot (10) and the internal thread lifting seat (9) are locked and fixed by fastening bolts (11).

4. The valve body surround-type electrically controlled segmented detection device according to claim 1, characterized in that: The annular guide rail (6) is internally fitted with an electrically controlled adjustment frame (12) for adjusting the modular detachable detection module (7), which can slide along the circumference of the annular guide rail (6).

5. The valve body surround-type electrically controlled segmented detection device according to claim 4, characterized in that: The electrically controlled adjustment frame (12) includes an annular assembly frame (13) that is slidably mounted on the inner side of the annular guide rail (6), a top-mounted adjustment motor (14) fixed on the upper end of the annular guide rail (6), and an electrically controlled telescopic clamping arm (15) that is movably mounted on the inner side of the annular assembly frame (13). The top-mounted adjustment motor (14) is driven by the adjustment gear (16) on the bottom rotating shaft meshing with the embedded annular internal gear ring (17) on the annular assembly frame (13). The top-mounted adjustment motor (14) is a servo motor.

6. The valve body surround-type electrically controlled segmented detection device according to claim 5, characterized in that: The electrically controlled telescopic clamping arm (15) includes an arc-shaped first flip arm (18), an arc-shaped second flip arm (19), a first electrically controlled support rod (20), a second electrically controlled support rod (21), an arc-shaped assembly frame (22), an adjusting slider (23) and a compression spring (24) that are hinged inside the annular assembly frame (13). The outer ends of the arc-shaped first flip arm (18) and the arc-shaped second flip arm (19) are inserted into the arc-shaped assembly frame (22) and are movably hinged to the adjusting slider (23). The extended end of the first electrically controlled support rod (20) is hinged to the inner side of the arc-shaped first flip arm (18), and the extended end of the second electrically controlled support rod (21) is hinged to the inner side of the arc-shaped second flip arm (19). The first electrically controlled support rod (20) and the second electrically controlled support rod (21) are both electrically operated telescopic rods.

7. A valve body surround-type electrically controlled segmented detection device according to claim 6, characterized in that: The compression spring (24) is installed inside the arc-shaped assembly frame (22). The compression spring (24) pushes the adjusting slider (23) to both sides and slides back to the center position of the arc-shaped assembly frame (22). The compression spring (24) is a stainless steel compression spring.

8. The valve body surround-type electrically controlled segmented detection device according to claim 1, characterized in that: An external optical positioning module (25) is installed on the side wall of the longitudinal guide rail (4). The external optical positioning module (25) includes a CCD camera and a positioning sensor, which are used to accurately position the valve body.

9. A valve body surround-type electrically controlled segmented detection device according to claim 6, characterized in that: An embedded LED light (26) for supplementary lighting is fixedly installed on the inner arc surface of the arc-shaped assembly frame (22), and the embedded LED light (26) is evenly distributed along the circumference of the arc-shaped assembly frame (22).

10. A valve body surround-type electrically controlled segmented detection device according to claim 6, characterized in that: The arc-shaped first flipping arm (18) is offset from the first electrically controlled support rod (20), and the arc-shaped second flipping arm (19) is offset from the second electrically controlled support rod (21) with an offset angle of 30-45°.

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