Rapid detection device for drift diameter of valve

Abstract

The invention relates to the technical field of valve detection, in particular to a valve drift diameter rapid detection device which comprises a base, a valve is placed on the base, a pipe body is arranged on the base, the pipe body is inserted into a channel of the valve, a detection mechanism is arranged on the pipe body, and a positioning mechanism used for calibrating the position, located in the center of the channel, of the pipe body is arranged on the pipe body. The detection mechanism comprises a plurality of transmission sleeves arranged on the outer side of the pipe body, sliding discs are slidably connected into the transmission sleeves, springs are fixedly connected between the sliding discs and the inner walls of the transmission sleeves, ejector rods are fixedly connected to the sliding discs, the ejector rods extend out of the transmission sleeves and make contact with the inner walls of the channels, sliding grooves are formed in the transmission sleeves, and first connecting blocks are fixedly connected to the sliding discs. The end of the first connecting block extends out of the transmission sleeve and is provided with an induction block, and the transmission sleeve is provided with a displacement sensor corresponding to the induction block. Through the arrangement of the detection mechanism, radius size and flatness information of different positions can be synchronously collected, a channel overall contour analysis report is output after integration through a single-chip microcomputer, and rapid defect positioning is facilitated.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of valve detection, in particular to a valve diameter rapid detection device. BACKGROUND

[0002] In the industrial field, as the core component of the fluid control system, the diameter of the valve directly affects the flow, pressure and system stability of the fluid. Accurate detection of the size accuracy and flatness of the valve diameter is the key to ensuring that the valve performance meets the standards, avoiding installation compatibility problems and preventing safety hazards. Traditional detection methods (such as caliper single-point measurement and manual visual inspection) can only obtain discrete point data, and cannot reflect the size change of the valve channel in all directions and the flatness of the inner wall, which is easy to miss local convexity, concavity, oval deformation and other defects. For example, single-point measurement cannot identify irregular features such as inner wall welding tumor and corrosion pits distributed in all directions, resulting in strong one-sidedness of the detection results and difficulty in meeting the high-precision requirements of precision industrial scenes. SUMMARY

[0003] In view of the shortcomings of the prior art, the present application provides a valve diameter rapid detection device, which has the advantage of detecting multiple points of the valve diameter at the same time, and solves the problem of low detection efficiency.

[0004] To solve the above technical problems, the present application provides the following technical scheme: The valve diameter rapid detection device comprises a base, a valve is placed on the base, a pipe body is arranged on the base, the pipe body is inserted into the channel of the valve, a detection mechanism is arranged on the pipe body, a positioning mechanism for calibrating the center position of the pipe body in the channel is arranged on the pipe body, the detection mechanism comprises a plurality of transmission sleeves arranged on the outer side of the pipe body, a sliding disc is slidably connected in the transmission sleeve, a spring is fixedly connected between the sliding disc and the inner wall of the transmission sleeve, a top rod is fixedly connected to the sliding disc, the top rod extends to the outside of the transmission sleeve and contacts the inner wall of the channel, a sliding groove is formed in the transmission sleeve, a connecting block one is fixedly connected to the sliding disc, the end of the connecting block one extends to the outside of the transmission sleeve and is provided with a sensing block, a displacement sensor corresponding to the sensing block is arranged on the transmission sleeve, and a transmission assembly for driving the annular rotation of the plurality of transmission sleeves is arranged on the pipe body.

[0005] Preferably, the transmission assembly comprises a transmission ring rotatably installed on the outer side of the pipe body, the transmission sleeve and the displacement sensor are fixedly connected to the transmission ring, a gear ring is fixedly connected to the inner wall of the transmission ring, a motor one is fixedly arranged in the pipe body, a spur gear is fixedly connected to the output end of the motor one, a through groove corresponding to the spur gear is formed in the pipe body, and the spur gear is in meshing transmission with the gear ring.

[0006] Preferably, the bottom of the sliding disc is fixedly connected with a connecting block two, the end of the connecting block two extends to the lower side of the transmission sleeve through the sliding groove, the bottom of the transmission ring is fixedly provided with an electric telescopic rod, the free end of the electric telescopic rod is fixedly provided with a ball, and the ball and the connecting block two are fixedly connected with a transmission rope.

[0007] Preferably, the plurality of transmission sleeves are annularly distributed, and the plurality of transmission sleeves are not located in the same plane.

[0008] Preferably, the positioning mechanism comprises a plurality of bearing frames fixed to the outside of the pipe body, a limiting block is slidingly connected to the bearing frame, a screw sleeve is fixed to the top end of the limiting block, the screw sleeve is attached to the surface of the bearing frame, a plurality of screw rods are rotatably installed on the pipe body, the screw rods are threadedly connected with adjacent screw sleeves, a bevel gear II is fixed to the end of the screw rod, a motor II is fixed in the pipe body, a bevel gear I is fixed to the output end of the motor II, the bevel gear I is engaged with the plurality of bevel gear II respectively, and a positioning disc attached to the outer wall of the channel is fixed to the bottom end of the limiting block.

[0009] Preferably, a bracket is fixed to the base, a motor is fixed to the bracket, a transmission roller is fixed to the output end of the motor, a connecting rope is wound around the transmission roller, a lifting ring is fixed to the pipe body, and the connecting rope is connected with the lifting ring.

[0010] Preferably, a single-chip microcomputer is installed in the pipe body, and a display screen is installed on the base.

[0011] Preferably, the bottom surface of the positioning disc is an arc surface, and the curvature radius of the arc surface is adapted to the curvature of the outer wall of the valve channel.

[0012] Preferably, the end of the jacking rod is provided with a replaceable contact, and the contact is made of hard alloy material.

[0013] By the above technical scheme, the valve channel diameter rapid detection device provided by the application has at least the following beneficial effects: 1. The valve channel diameter rapid detection device, by setting the detection mechanism, the displacement sensor detects the movement of the sensing block, so as to measure the size of the radius in the channel, the transmission assembly drives the jacking rod to rotate annularly, the displacement sensor judges the movement amplitude of the sensing block, the flatness of the inner wall of the channel can be detected, each transmission sleeve corresponds to independent jacking rod, sensing block and displacement sensor, the radius size and flatness information at different positions can be synchronously collected, and the single-chip microcomputer integrates and outputs a channel overall contour analysis report, so that defects can be quickly positioned.

[0014] 2. The valve channel diameter rapid detection device, the spring pushes the sliding disc to make the jacking rod always elastically attached to the inner wall of the channel, the spring force can ensure close contact, and the elastic buffer can prevent hard contact from damaging the inner wall of the valve, and the device is especially suitable for detecting precise valves or channels made of soft material.

[0015] 3. The valve channel diameter rapid detection device, the positioning mechanism accurately fixes the pipe body at the center position of the valve channel, avoids deviation of the detection data caused by the deviation of the pipe body, ensures that the subsequent radius measurement and flatness detection are based on the center of the channel, and improves the reliability of the detection result.

[0016] 4、The valve diameter rapid detection device can flexibly control the detection speed and scanning range through the start-stop and speed regulation of the motor one, and realizes quantitative analysis of the inner wall flatness by cooperating with the displacement sensor to monitor the moving amplitude of the sensing block in real time, so as to meet the precision requirements of different detection scenes.

[0017] 5、The valve diameter rapid detection device can simultaneously detect multiple layers of the inner wall of the channel, and obtain the radius size and flatness data of multiple positions at one time, thereby improving the detection efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0018] The accompanying drawings, which are included to provide a further understanding of the application and constitute a part of this application, illustrate embodiments of the application: Figure 1 is a schematic diagram of the three-dimensional structure of the application; Figure 2 is a sectional view of the channel of the application; Figure 3 is a sectional view of the transmission sleeve of the application; Figure 4 is a schematic diagram of the external connection structure of the electric telescopic rod of the application; Figure 5 is a schematic diagram of the transmission assembly of the application; Figure 6 is a schematic diagram of the external connection structure of the pipe body of the application; Figure 7 is a schematic diagram of the positioning mechanism of the application.

[0019] Reference signs: 100, base; 101, support; 102, motor; 103, transmission roller; 104, lifting ring; 105, pipe body; 106, single-chip microcomputer; 107, handle; 108, connecting rope; 109, display screen; 200, detection mechanism; 201, transmission sleeve; 202, top rod; 203, spring; 204, sliding disc; 205, connecting block one; 206, sliding groove; 207, sensing block; 208, displacement sensor; 209, electric telescopic rod; 210, ball; 211, transmission rope; 212, connecting block two; 213, transmission assembly; 2131, motor one; 2132, straight gear; 2133, transmission ring; 2134, gear ring; 2135, through slot; 300, positioning mechanism; 301, motor two; 302, bevel gear one; 303, bearing frame; 304, screw; 305, bevel gear two; 306, screw sleeve; 307, limiting block; 308, positioning disc; 400, channel. DETAILED DESCRIPTION

[0020] With reference to the accompanying drawings, the technical solutions in the embodiments of the present application will be described clearly and completely. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of the present application.

[0021] Some embodiments of the valve diameter rapid detection device provided by the present application are described below with reference to the accompanying drawings.

[0022] Embodiment one: The valve diameter directly determines the fluid flow capacity. If the size deviation of the diameter exceeds the allowable range, for example, if the diameter is too small, it will increase the fluid resistance, causing insufficient flow or excessive pressure loss, and if the diameter is too large, it may cause the flow rate to exceed the design threshold, causing erosion corrosion, noise or vibration. In order to solve the above problems, in combination with the prior art Figures 1-3 As shown in the drawings, the valve diameter rapid detection device provided by the present application comprises a base 100, a valve is placed on the base 100, the base 100 is provided with a pipe body 105, the pipe body 105 is inserted into the passage 400 of the valve, the pipe body 105 is provided with a detection mechanism 200, the pipe body 105 is provided with a positioning mechanism 300 for calibrating the center position of the pipe body 105 in the passage 400, the pipe body 105 is accurately fixed at the center position of the valve passage 400 through the positioning mechanism 300, so as to avoid the deviation of the detection data caused by the deviation of the pipe body 105, and ensure that the subsequent radius measurement and flatness detection are based on the center of the passage 400, thereby improving the reliability of the detection results; The existing detection means (such as traditional caliper single-point measurement, manual visual inspection or single sensor rotary scanning) can cause incomplete detection coverage, and single-point or few-point measurement cannot reflect the full circumferential size change and flatness of the channel 400, and local convex-concave deformation and other defects are easy to be missed. In order to solve the above problems, the detection mechanism 200 comprises a plurality of transmission sleeves 201 arranged on the outer side of the pipe body 105. The transmission sleeve 201 is slidably connected with a sliding disc 204. The sliding disc 204 and the inner wall of the transmission sleeve 201 are fixedly connected with a spring 203. The sliding disc 204 is fixedly connected with a top rod 202. The top rod 202 extends to the outside of the transmission sleeve 201 and contacts the inner wall of the channel 400. The transmission sleeve 201 is provided with a sliding groove 206. The sliding disc 204 is fixedly connected with a connecting block 205. The end of the connecting block 205 extends to the outside of the transmission sleeve 201 and is provided with a sensing block 207. The transmission sleeve 201 is provided with a displacement sensor 208 corresponding to the sensing block 207. The pipe body 105 is provided with a transmission assembly 213 for driving the annular rotation of the plurality of transmission sleeves 201. First, the pipe body 105 is inserted into the channel 400. The spring 203 pushes the sliding disc 204 to move outward. The sliding disc 204 drives the top rod 202 to fit with the inner wall of the channel 400. The connecting block 205 moves with the sliding disc 204. The connecting block drives the sensing block 207 to move. The displacement sensor 208 detects the movement of the sensing block 207, so that the size of the radius of the channel 400 can be measured. The transmission assembly 213 drives the annular rotation of the top rod 202. The displacement sensor 208 judges the movement amplitude of the sensing block 207, so that the flatness of the inner wall of the channel 400 can be detected. Each transmission sleeve 201 corresponds to an independent top rod 202, sensing block 207 and displacement sensor 208, so that the radius size and flatness information at different positions can be synchronously collected. The single-chip microcomputer 106 integrates and outputs the overall profile analysis report of the channel 400, which is convenient for quickly positioning defects.

[0023] Specifically, the base 100 is fixedly connected with a support 101. The support 101 is fixedly connected with a motor 102. The output end of the motor 102 is fixedly connected with a transmission roller 103. The transmission roller 103 is wound with a connecting rope 108. The pipe body 105 is fixedly connected with a lifting ring 104. The connecting rope 108 is connected with the lifting ring 104. The motor 102 drives the transmission roller 103 to rotate. The transmission roller 103 winds and unwinds the connecting rope 108, so that the pipe body 105 can be lowered and retracted through the lifting ring 104.

[0024] Further, the end of the top rod 202 is provided with a replaceable contact. The contact is made of hard alloy material, which has high hardness and wear resistance, is suitable for long-term high-frequency detection scene, reduces the precision decline problem caused by contact wear, has low replacement cost and convenient operation.

[0025] According to the embodiment, the spring 203 pushes the sliding disc 204 to make the top rod 202 always elastically fit the inner wall of the channel 400. The spring 203 can ensure close contact and prevent damage to the inner wall of the valve by elastic buffering. It is especially suitable for detecting precise valves or channels 400 made of soft materials.

[0026] Embodiment two: The artificial point-by-point measurement or manual rotation detection device is time-consuming, and measurement errors can be introduced by human shaking and positioning deviation during the operation process. In order to solve the above problems, combined with the problems in the prior art, the embodiment one is improved. Figure 4 and Figure 5 As shown in the embodiment one, the transmission assembly 213 includes a transmission ring 2133 rotatably installed outside the pipe body 105. The transmission sleeve 201 and the displacement sensor 208 are fixedly connected to the transmission ring 2133. The inner wall of the transmission ring 2133 is fixedly connected with a gear ring 2134. A motor one 2131 is fixedly installed in the pipe body 105. The output end of the motor one 2131 is fixedly connected with a spur gear 2132. A through slot 2135 corresponding to the spur gear 2132 is formed in the pipe body 105. The spur gear 2132 is in meshing transmission with the gear ring 2134. The motor one 2131 drives the spur gear 2132 to rotate. The spur gear 2132 drives the transmission ring 2133 to rotate through the gear ring 2134, thereby driving the displacement sensor and the transmission sleeve 201 to rotate annularly. The start-stop and rotation speed of the motor one 2131 can be adjusted to flexibly control the detection speed and the scanning range. The displacement sensor 208 can be used to monitor the moving amplitude of the sensing block 207 in real time, so as to realize quantitative analysis of the flatness of the inner wall and meet the precision requirements of different detection scenes.

[0027] When the pipe body 105 is placed into the channel 400, the spring 203 can cause the top rod 202 to move outward. The length of the top rod 202 is too long to be placed into the channel 400. In order to solve the above problems, the bottom of the sliding disc 204 is fixedly connected with a connecting block two 212. The end of the connecting block two 212 extends to the lower side of the transmission sleeve 201 through the sliding groove 206. The bottom of the transmission ring 2133 is fixedly connected with an electric telescopic rod 209. The free end of the electric telescopic rod 209 is fixedly connected with a ball 210. The ball 210 and the connecting block two 212 are fixedly connected with a transmission rope 211. When the top rod 202 needs to be retracted, the electric telescopic rod 209 is started to move the free end downward. The ball 210 moves downward with the free end. The ball 210 pulls the transmission rope 211 to drive the connecting block two 212 to move the top rod 202 inward, so that the top rod 202 does not contact the inner wall of the channel 400. When detection is needed, the electric telescopic rod 209 is started to move the free end upward, without restraining the top rod 202.

[0028] Further, the plurality of transmission sleeves 201 are annularly distributed, and the plurality of transmission sleeves 201 are not located in the same plane, so that the plurality of layers of the inner wall of the channel 400 can be detected at the same time, the radius size and flatness data of multiple positions are obtained at one time, and the detection efficiency is improved.

[0029] According to the embodiment, the flatness of the inner wall in the circumferential direction can be determined. For example, if the movement amplitude of the sensing block 207 at a position suddenly increases, it indicates that there is a depression or protrusion at the position of the inner wall, and dynamic visual tracking of the defect is realized.

[0030] Embodiment three: If the pipe body 105 is eccentric, the radial distance between the ejector rod 202 and the inner wall of the channel 400 will produce a systematic error due to the deviation from the center (for example, if the actual radius of the channel 400 is 100 mm, the eccentricity of 5 mm will cause the measurement value to deviate by ±5 mm), in order to solve the above problem, in combination with Figure 6 and Figure 7 As shown in the embodiment one, the positioning mechanism 300 includes a plurality of bearing frames 303 fixed to the outer side of the pipe body 105, a limiting block 307 is slidingly connected on the bearing frame 303, a screw sleeve 306 is fixed to the top end of the limiting block 307, the screw sleeve 306 is attached to the surface of the bearing frame 303, a plurality of screw rods 304 are rotatably installed on the pipe body 105, the screw rod 304 is threadedly connected with the adjacent screw sleeve 306, the end of the screw rod 304 is fixedly connected with a bevel gear two 305, a motor two 301 is fixedly installed in the pipe body 105, the output end of the motor two 301 is fixedly connected with a bevel gear one 302, the bevel gear one 302 is engaged with a plurality of bevel gear two 305 for transmission, the bottom end of the limiting block 307 is fixedly connected with a positioning disc 308 which is attached to the outer wall of the channel 400, the motor two 301 is started to drive the bevel gear one 302 to rotate, the bevel gear one 302 drives the screw rod 304 to rotate through the bevel gear two 305, the screw rod 304 drives the screw sleeve 306 to move, the limiting block 307 moves with the screw sleeve 306, the limiting block 307 drives the positioning disc 308 to move towards the center of the channel 400, so that the plurality of positioning discs 308 are in contact with the outer wall of the channel 400, the pipe body 105 can be fixed at the center of the channel 400, the equal-speed and same-direction rotation of all the screw rods 304 can be ensured, the lagging or overshooting of single-direction positioning can be avoided, the synchronous attachment of the positioning disc 308 to the outer wall of the channel 400 is ensured, and the centering efficiency and consistency are improved.

[0031] The pipe body 105 is fixedly connected with a handle 107, and a worker holds the handle 107 to insert the pipe body 105 into the channel 400.

[0032] Specifically, the single-chip microcomputer 106 is installed in the pipe body 105, and the display screen 109 is installed on the base 100. When the top rod 202 is attached to the inner wall of the channel 400 under the action of the spring 203, the sliding disc 204 drives the inductive block 207 to move, and the displacement sensor 208 captures the displacement change of the inductive block 207 in real time and converts it into an electrical signal (such as a voltage or a digital signal). The signal is transmitted to the single-chip microcomputer 106 through a cable. After the single-chip microcomputer 106 converts the analog signal into a digital signal through the built-in analog-to-digital converter, the radius size and the flatness of the inner wall of the channel 400 are calculated based on a preset algorithm, and the operation rhythm of the positioning mechanism 300 and the transmission assembly 213 (such as the driving motor 2131 driving the transmission sleeve 201 to rotate) is coordinated and controlled. The processed detection data is transmitted from the single-chip microcomputer 106 to the display screen 109 of the base 100 through a communication module, and is displayed in the form of a numerical value, a chart or color coding in real time. The operator can intuitively obtain the geometric parameters and the defect position of the channel 400. The whole process does not need manual intervention, and automation and intelligence are realized from signal acquisition to result presentation.

[0033] Further, the bottom surface of the positioning disc 308 is an arc surface, and the curvature radius of the arc surface is matched with the curvature of the outer wall of the valve channel 400.

[0034] Through the above embodiment, first, the valve is placed on the base 100, the motor 102 on the support 101 of the base 100 is started, the transmission roller 103 at the output end of the motor 102 rotates to pay out the connecting rope 108, and the pipe body 105 is inserted into the passage 400 of the valve; then the motor two 301 in the pipe body 105 is started, driving the bevel gear one 302 to rotate, the bevel gear one 302 meshes with the plurality of bevel gears two 305 to drive the screw rod 304 to rotate, the screw sleeve 306 moves due to the rotation of the screw rod 304, the limiting block 307 moves with the screw sleeve 306 and drives the positioning disc 308 to move to the center of the passage 400, until the plurality of positioning discs 308 contact the outer wall of the passage 400, the pipe body 105 is fixed at the center position of the passage 400; at this time, the spring 203 pushes the sliding disc 204 to move outward, the sliding disc 204 drives the top rod 202 to make the hard alloy contact at the end thereof adhere to the inner wall of the passage 400, the connecting block one 205 on the sliding disc 204 moves with the sliding disc 204 and drives the inductive block 207 to move, the displacement sensor 208 detects the movement of the inductive block 207 to measure the radius size in the passage 400; then the motor one 2131 in the pipe body 105 is started, driving the spur gear 2132 to rotate, the spur gear 2132 drives the transmission ring 2133 to rotate through the gear ring 2134, and then drives the displacement sensor 208 and the transmission sleeve 201 fixed to the transmission ring 2133 to rotate in a ring shape, in the process of rotation, the displacement sensor 208 judges the movement amplitude of the inductive block 207 to detect the flatness of the inner wall of the passage 400; if it is needed to retract the top rod 202, the electric telescopic rod 209 at the bottom of the transmission ring 2133 is started to make the free end thereof move downward, the ball 210 descends with the free end and pulls the transmission rope 211 to drive the connecting block two 212, so that the top rod 202 moves inward and does not contact the inner wall of the passage 400, after the detection is completed, the motor 102 is started again to drive the transmission roller 103 to rotate to wind the connecting rope 108, the pipe body 105 is retracted through the lifting ring 104, and the single-chip microcomputer 106 in the pipe body 105 processes the detection data in the whole detection process, and the display screen 109 on the base 100 can display the related detection results.

[0035] It should be noted that the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus.

[0036] Although embodiments of the present application have been shown and described, it is to be understood that various modifications, substitutions, replacements and changes can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A valve diameter rapid detection device, comprising a base (100), on which a valve is placed, characterized in that: The base (100) is provided with a tube body (105), the tube body (105) is inserted into the channel (400) of the valve, the tube body (105) is provided with a detection mechanism (200), and the tube body (105) is provided with a positioning mechanism (300) for calibrating its position at the center of the channel (400); The detection mechanism (200) includes a plurality of transmission sleeves (201) arranged on the outside of the tube body (105), a sliding disc (204) is slidably connected to the transmission sleeve (201), a spring (203) is fixed between the sliding disc (204) and the inner wall of the transmission sleeve (201), a push rod (202) is fixed to the sliding disc (204), the push rod (202) extends to the outside of the transmission sleeve (201) and contacts the inner wall of the channel (400), a sliding groove (206) is provided on the transmission sleeve (201), a connecting block (205) is fixed to the sliding disc (204), the end of the connecting block (205) extends to the outside of the transmission sleeve (201) and is installed with a sensing block (207), a displacement sensor (208) corresponding to the sensing block (207) is provided on the transmission sleeve (201), and a transmission assembly (213) for driving the plurality of transmission sleeves (201) to rotate in a circular manner is provided on the tube body (105).

2. The valve diameter rapid detection device according to claim 1, characterized in that: The transmission assembly (213) comprises a transmission ring (2133) rotatably mounted on the outside of the tube body (105); the transmission sleeve (201) and the displacement sensor (208) are both fixedly connected to the transmission ring (2133); a gear ring (2134) is fixedly connected to the inner wall of the transmission ring (2133); a motor 1 (2131) is fixedly mounted in the tube body (105); a spur gear (2132) is fixedly connected to the output end of the motor 1 (2131); a through slot (2135) corresponding to the spur gear (2132) is formed on the tube body (105); and the spur gear (2132) and the gear ring (2134) are meshed for transmission.

3. The valve diameter rapid detection device according to claim 1, characterized in that: The bottom of the sliding plate (204) is fixedly connected to a second connecting block (212), the end of the second connecting block (212) extends to the bottom of the transmission sleeve (201) through the sliding groove (206), the bottom of the transmission ring (2133) is fixedly installed with an electric telescopic rod (209), the free end of the electric telescopic rod (209) is fixedly connected to a sphere (210), and a transmission rope (211) is fixedly connected between the sphere (210) and the second connecting block (212).

4. The valve diameter rapid detection device according to claim 1, characterized in that: The plurality of transmission sleeves (201) are distributed in a ring shape, and the plurality of transmission sleeves (201) are not located in the same plane.

5. The valve diameter rapid detection device according to claim 1, characterized in that: The positioning mechanism (300) comprises a plurality of load-bearing frames (303) fixedly connected to the outside of the tube body (105), a limiting block (307) being slidably connected to the load-bearing frame (303), a screw sleeve (306) being fixedly connected to the top end of the limiting block (307), the screw sleeve (306) being in contact with the surface of the load-bearing frame (303), a plurality of screw rods (304) being rotatably mounted on the tube body (105), the screw rods (304) being threadedly connected to adjacent screw sleeves (306), the ends of the screw rods (304) being fixedly connected to a second bevel gear (305), a second motor (301) being fixedly installed in the tube body (105), the output end of the second motor (301) being fixedly connected to a first bevel gear (302), the first bevel gear (302) being respectively meshed with the plurality of second bevel gears (305) for transmission, and a positioning plate (308) being fixedly connected to the outer wall of the channel (400) at the bottom end of the limiting block (307).

6. The valve diameter rapid detection device according to claim 1, characterized in that: A bracket (101) is fixedly connected to the base (100), a motor (102) is fixedly mounted on the bracket (101), a transmission roller (103) is fixedly connected to the output end of the motor (102), a connecting rope (108) is wound around the transmission roller (103), a hanging ring (104) is fixedly connected to the tube body (105), and the connecting rope (108) is connected to the hanging ring (104).

7. The valve diameter rapid detection device according to claim 1, characterized in that: A single-chip microcomputer (106) is installed in the tube body (105), and a display screen (109) is installed on the base (100).

8. The valve diameter rapid detection device according to claim 1, characterized in that: The bottom surface of the positioning plate (308) is an arc-shaped surface, and the curvature radius of the arc-shaped surface is adapted to the curvature of the outer wall of the valve channel (400).

9. The valve diameter rapid detection device according to claim 1, characterized in that: The end of the push rod (202) is provided with a replaceable contact, which is made of hard alloy material.

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