Size inspection system for stainless steel pipe production

Abstract

The invention discloses a size inspection system for stainless steel pipe production, and relates to the technical field of stainless steel pipe detection. According to the invention, the external diameter of the steel pipe is obtained through cooperation of the pressing external diameter detection roller and the detection support roller by using the resistor strip and the contact sliding needle; and a closed loop is formed by the voltage-adjustable conductive contact roller to measure the inner diameter and the wall thickness. All the roller axes are perpendicular to the moving direction of the steel pipe, it is ensured that accurate online size detection is achieved in continuous production, the device can adapt to steel pipes of various specifications through rapid replacement and structure adjustment, and the detection efficiency and quality are greatly improved.

Description

Technical Field

[0001] The invention relates to the technical field of stainless steel pipe detection, in particular to a size inspection system for stainless steel pipe production. Background Art

[0002] At present, the common method of stainless steel pipe size detection in the industry is to use shutdown sampling or manual vernier calipers and ultrasonic equipment to detect the outer diameter and inner diameter respectively. For the outer diameter measurement, it is necessary to manually measure each position of the steel pipe frequently, and use various diameter measuring instruments to measure section by section; for the inner diameter measurement, since only the inner diameter at both ends of the steel pipe can be measured, if the inner diameter in the middle of the steel pipe needs to be measured, the sample must be cut for testing. This not only increases the complexity of the measurement process, but also leads to reduced production efficiency and increased costs. More importantly, manual methods are difficult to achieve fast, continuous and accurate real-time monitoring, and are often prone to measurement lags, missed detections, and data accuracy deviations. Once deviations or defects occur, the entire batch of steel pipes may face quality risks, resulting in waste of materials and time, and cannot meet the demand for simultaneous improvement of product quality and efficiency. Summary of the invention

[0003] In order to overcome the defects of the above-mentioned prior art, the present invention provides the following technical solutions: a size inspection system for stainless steel pipe production, comprising a side panel, two guide shaft brackets are fixedly installed on the side panel, guide shafts are fixedly installed on the two guide shaft brackets, threaded sleeves are rotatably sleeved on the outer surface of the guide shaft, nut sleeves are threadedly sleeved on the threaded sleeves, the nut sleeves are fixed on the middle connecting frame beam, and positioning support roller brackets and outer diameter detection roller brackets are respectively fixedly installed at both ends of the middle connecting frame beam, a plurality of positioning support rollers are rotatably installed on the positioning support roller bracket, a plurality of detection support rollers are rotatably installed on the outer diameter detection roller bracket, the axes of the detection support rollers and the outer diameter detection roller bracket are in the same horizontal plane, and the outer diameter detection roller bracket and the detection support roller are used to support the steel pipe; two symmetrically arranged conductive contact rollers are arranged between the positioning support roller bracket and the outer diameter detection roller bracket, the conductive contact rollers are rollingly conductively matched with the upper and lower surfaces of the steel pipe, and the conductive contact rollers are rotatably mounted on the conductive contact roller bracket in a manner that is easy to disassemble, and the two conductive contact rollers are conductively matched through the steel pipe to detect the inner diameter of the steel pipe.

[0004] Preferably, the side panel is fixedly mounted on the base, and a spline rod is also fixedly mounted on the side panel, a C-shaped frame is sleeved on the spline rod by means of spline sliding, both ends of the top and bottom of the C-shaped frame are threadedly inserted to cooperate with a pressure-adjusting threaded sleeve, and the axial position inside the pressure-adjusting threaded sleeve is slidably inserted to cooperate with the sliding differential shaft.

[0005] Preferably, the bottom end of the sliding differential shaft is fixedly matched with the conductive contact roller bracket, a protrusion is fixed on the conductive contact roller bracket, two parallel circular holes are opened on the conductive contact roller bracket, limiting plate guide rods are slidably arranged in the two circular holes, the two limiting plate guide rods are fixedly matched with the limiting plates, and the limiting plates are rotationally matched with the conductive contact roller.

[0006] Preferably, a tension spring is fixed between the protruding block and the limiting plate, which is used to pull the limiting plate to squeeze the conductive contact roller and prevent the conductive contact roller from falling off the conductive contact roller bracket; an extrusion spring is provided around the sliding differential shaft, and the top end of the extrusion spring is rotatably matched with the voltage-adjusting threaded sleeve and the conductive contact roller bracket, wherein the two ends of the extrusion spring and the voltage-adjusting threaded sleeve and the conductive contact roller bracket can only rotate circumferentially and cannot move axially.

[0007] Preferably, a positioning frame is fixedly installed on the base, a sliding hanger is fixedly installed on the top of the positioning frame, and two positioning roller rotating shafts are symmetrically and movably installed on the bottom end of the sliding hanger. A positioning roller for extruding steel pipes is rotatably sleeved on each positioning roller rotating shaft, and a connecting block is fixed on the end of each positioning roller rotating shaft away from the sliding hanger.

[0008] Preferably, a downward pressure beam is provided on the sliding sleeve of the sliding hanger, and a downward pressure spring is fixed between the downward pressure beam and the top of the positioning frame. The downward pressure spring is arranged around the outside of the sliding hanger, and the two ends of the downward pressure beam are movably connected to the two connecting blocks through a downward pressure connecting rod.

[0009] Preferably, two slide grooves are provided on the outer diameter detection roller bracket, and a downward pressing outer diameter detection roller is slidably arranged between the two slide grooves. The downward pressing outer diameter detection roller is in contact and rolling cooperation with the steel pipe, and the two ends of the downward pressing outer diameter detection roller are rotatably installed on two resistance bars. A counterweight block is fixed below the two resistance bars through a lifting rod, and the counterweight block is located below the outer diameter detection roller bracket.

[0010] Preferably, two parallel counterweight guide slide bars are fixedly installed on the lower surface of the outer diameter detection roller bracket, and the counterweight sliding sleeve is arranged on the counterweight guide slide bar; a contact sliding needle is also arranged on the side of the outer diameter detection roller bracket, and the contact sliding needle contacts and slides with the resistor bar for conductive cooperation.

[0011] Compared with the prior art, the present invention has the following beneficial effects: (1) The present invention utilizes the cooperation between the downward pressure outer diameter detection roller and the detection support roller, and measures the outer diameter of the steel pipe in real time through the movement of the resistance bar and the contact sliding needle, and can automatically obtain the outer diameter change data during the continuous movement of the steel pipe. Since there is no need to stop production or repeat manual measurement, the impact of the detection process on production efficiency is greatly reduced, and the measurement deviation caused by manual operation errors is effectively avoided; (2) The present invention forms a closed loop with the surface of the steel pipe through two conductive contact rollers, and then combines the cooperation of the sliding differential shaft and the pressure-adjusting threaded sleeve to achieve accurate detection of the inner diameter change. When the inner diameter is small, the pipe wall is relatively thick, and the corresponding resistance value is smaller, so that the wall thickness conditions of different parts can be quickly determined, and when measuring the inner diameter of the middle section of the steel pipe, there is no need to cut the steel pipe. This resistance measurement method based on the conversion of current size has a simple structure and fast response speed, which effectively improves the efficiency and accuracy of inner diameter detection. (3) When replacing steel pipes of different diameters, the present invention only needs to pull the limiting plate to disassemble and assemble the conductive contact roller of the corresponding size, and adjust the position of the middle connecting frame beam by rotating the threaded sleeve, so that the positioning support roller bracket and the outer diameter detection roller bracket can be synchronously changed. This modular replacement method not only simplifies the operation steps, but also can quickly complete the adjustment and ensure the detection accuracy when it is necessary to adapt to different steel pipe specifications. (4) All roller axes of the entire detection device are perpendicular to the movement direction of the steel pipe in space, and the detection elements are arranged in the same direction as the production line, so that the steel pipe can complete multi-point and multi-dimensional size detection while moving during continuous production. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0013] Figure 2 For the present invention Figure 1 Schematic diagram of the structure at point A in the middle.

[0014] Figure 3 This is a schematic diagram of the structure of the guide slide rod of the counterweight block of the present invention.

[0015] Figure 4 For the present invention Figure 3 Schematic diagram of the structure at point B in the middle.

[0016] Figure 5 For the present invention Figure 3 Schematic diagram of the structure at point C in the middle.

[0017] Figure 6 It is a structural schematic diagram of the spline rod of the present invention.

[0018] Figure 7 For the present invention Figure 6 Schematic diagram of the structure at point D in the middle.

[0019] Figure 8It is a structural schematic diagram of the chute of the present invention.

[0020] In the figure: 101-positioning frame; 102-downward pressure beam; 103-downward pressure connecting rod; 104-connecting block; 105-positioning roller; 106-positioning roller rotating shaft; 107-sliding suspension rod; 108-downward pressure spring; 109-base; 110-side panel; 111-positioning support roller bracket; 112-positioning support roller; 113-middle connecting frame beam; 114-outer diameter detection roller bracket; 115-resistance bar; 116-contact sliding needle; 117-slideway; 118-detection support roller; 119- Counterweight block; 120-lifting rod; 121-pressing outer diameter detection roller; 122-counterweight block guide slide rod; 123-nut sleeve; 124-threaded sleeve; 125-guide shaft; 126-guide shaft bracket; 127-limiting plate; 128-spline rod; 129-C-shaped frame; 130-pressure regulating threaded sleeve; 131-sliding differential shaft; 132-extrusion spring; 133-conductive contact roller bracket; 134-conductive contact roller; 135-protrusion block; 136-tension spring; 137-limiting plate guide plug rod. DETAILED DESCRIPTION

[0021] The following is combined with Figure 1-8 , and further illustrate the technical solution of the present invention through specific implementation methods.

[0022] The present invention provides a dimension inspection system for stainless steel pipe production, comprising a side panel 110, on which two guide shaft brackets 126 are fixedly installed, on which guide shafts 125 are fixedly installed, a threaded sleeve 124 is rotatably sleeved on the outer surface of the guide shaft 125, a nut sleeve 123 is threadedly sleeved on the threaded sleeve 124, and the nut sleeve 123 is fixed on the middle connecting frame beam 113, and two ends of the middle connecting frame beam 113 are respectively fixedly installed with a positioning support roller bracket 111 and an outer diameter detection roller bracket 114, and a plurality of positioning support rollers 112 are rotatably installed on the positioning support roller bracket 111, and an outer diameter detection roller bracket 114 is fixedly installed. A plurality of detection support rollers 118 are rotatably mounted on the outer diameter detection roller bracket 114, and the axes of the detection support rollers 118 and the outer diameter detection roller bracket 114 are in the same horizontal plane, and the outer diameter detection roller bracket 114 and the detection support rollers 118 are used to support the steel pipe; two symmetrically arranged conductive contact rollers 134 are arranged between the positioning support roller bracket 111 and the outer diameter detection roller bracket 114, and the conductive contact rollers 134 are in rolling conductive cooperation with the upper and lower surfaces of the steel pipe, and the conductive contact rollers 134 are rotatably mounted on the conductive contact roller bracket 133 in a manner that is easy to disassemble, and the two conductive contact rollers 134 are in conductive cooperation through the steel pipe to detect the inner diameter of the steel pipe. The side panel 110 is fixedly mounted on the base 109, and a spline rod 128 is also fixedly mounted on the side panel 110. A C-shaped frame 129 is sleeved on the spline rod 128 by means of spline sliding. The top and bottom ends of the C-shaped frame 129 are threadedly inserted with a pressure-adjusting threaded sleeve 130, and the axis position inside the pressure-adjusting threaded sleeve 130 is slidably inserted to fit the sliding differential shaft 131. The bottom end of the sliding differential shaft 131 is fixedly matched with a conductive contact roller bracket 133, and a protruding block 135 is fixed on the conductive contact roller bracket 133. The conductive contact roller bracket 133 is provided with two parallel circular holes, and a limiting plate guide plug rod 137 is slidably set in the two circular holes. The two limiting plate guide plug rods 137 are fixedly matched with the limiting plate 127, and the limiting plate 127 is rotationally matched with the conductive contact roller 134. A tension spring 136 is fixed between the protruding block 135 and the limiting plate 127, which is used to pull the limiting plate 127 to squeeze the conductive contact roller 134, so as to prevent the conductive contact roller 134 from falling off the conductive contact roller bracket 133; an extrusion spring 132 is arranged around the sliding differential shaft 131, and the top end of the extrusion spring 132 is rotatably matched with the pressure-adjusting threaded sleeve 130 and the conductive contact roller bracket 133, wherein the two ends of the extrusion spring 132 and the pressure-adjusting threaded sleeve 130 and the conductive contact roller bracket 133 can only rotate circumferentially and cannot move axially.A positioning frame 101 is fixedly installed on the base 109, a sliding suspension rod 107 is fixedly installed on the top of the positioning frame 101, and two positioning roller rotating shafts 106 are symmetrically and movably installed at the bottom of the sliding suspension rod 107. A positioning roller 105 for extruding steel pipes is rotatably sleeved on each positioning roller rotating shaft 106, and a connecting block 104 is fixed on one end of each positioning roller rotating shaft 106 away from the sliding suspension rod 107. A downward pressure beam 102 is slidably sleeved on the sliding suspension rod 107, and a downward pressure spring 108 is fixed between the downward pressure beam 102 and the top of the positioning frame 101. The downward pressure spring 108 is arranged around the outer side of the sliding suspension rod 107, and the two ends of the downward pressure beam 102 are movably connected to the two connecting blocks 104 through a downward pressure connecting rod 103. Two slide slots 117 are also provided on the outer diameter detection roller bracket 114, and a downward pressing outer diameter detection roller 121 is slidably arranged between the two slide slots 117. The downward pressing outer diameter detection roller 121 contacts and rolls with the steel pipe, and the two ends of the downward pressing outer diameter detection roller 121 are rotatably mounted on the two resistor bars 115. A counterweight 119 is fixed below the two resistor bars 115 through a hanging rod 120, and the counterweight 119 is located below the outer diameter detection roller bracket 114. Two parallel counterweight guide slide bars 122 are fixedly mounted on the lower surface of the outer diameter detection roller bracket 114, and the counterweight 119 is slidably sleeved on the counterweight guide slide bar 122; a contact sliding needle 116 is also arranged on the side of the outer diameter detection roller bracket 114, and the contact sliding needle 116 contacts and slides with the resistor bar 115 for conductive cooperation.

[0023] The working principle of a dimension inspection system for stainless steel pipe production disclosed in the present invention is as follows: one end of the steel pipe is sequentially passed through between the downward pressure outer diameter detection roller 121 and the detection support roller 118 (the downward pressure outer diameter detection roller 121 is lifted, and then the steel pipe is inserted. Under the action of the gravity of the counterweight block 119, the downward pressure outer diameter detection roller 121 is pulled by the lifting rod 120 and the resistance bar 115 to squeeze the surface of the steel pipe), between two conductive contact rollers 134, and between the positioning roller 105 and the positioning support roller 112 (the downward pressure beam 102 is lifted to drive the two positioning rollers 105 to open and swing, and the steel pipe is inserted. Under the action of the elastic force of the downward pressure spring 108, the lifting rod 120 will drive the positioning roller 105 on the positioning roller rotating shaft 106 to swing inward through the downward pressure connecting rod 103 and the connecting block 104, so that the two positioning rollers 105 squeeze the steel pipe, and can also play a role in limiting the horizontal shaking of the steel pipe on the positioning support roller 112).

[0024] When in use, the voltage-regulating threaded sleeve 130 is rotated. The voltage-regulating threaded sleeve 130 rotates on the C-shaped frame 129 and moves along its own axial direction, and then drives the conductive contact roller 134 to move toward the surface of the steel pipe. After the conductive contact roller 134 contacts the surface of the steel pipe, the voltage-regulating threaded sleeve 130 is further rotated, so that the sliding difference shaft 131 is compressed, so that there is a certain pressure between the conductive contact roller 134 and the surface of the steel pipe (in order to ensure that when facing steel pipes with different outer diameters, the extrusion force of the conductive contact roller 134 on the steel pipes is consistent). At this time, a closed loop is formed between the two conductive contact rollers 134 and the steel pipe, and then the corresponding resistance value can be obtained (judged by the current size). When the steel pipe moves along the axial direction, the steel pipes at different positions will move between the two conductive contact rollers 134. At this time, the smaller the inner diameter of the steel pipe between the two conductive contact rollers 134 and the greater the thickness of its pipe wall, the smaller the resistance of the loop formed between the two conductive contact rollers 134. Therefore, the inner diameter of the steel pipe can be judged by measuring the resistance value between the two conductive contact rollers 134. Steel pipes of different diameters need to be matched with conductive contact rollers 134 of appropriate sizes to ensure effective contact between the conductive contact roller 134 and the surface of the steel pipe. Specifically, to replace the conductive contact roller 134, it is necessary to pull the limiting plate 127, pull the limiting plate 127 to the farthest position, remove the conductive contact roller 134 from the conductive contact roller bracket 133, and then install the new conductive contact roller 134 on the conductive contact roller bracket 133, and then reset the limiting plate 127 to limit the conductive contact roller 134 (a shaft is provided on the conductive contact roller bracket 133, and the conductive contact roller 134 is rotatably sleeved on the shaft). At the same time, it is necessary to rotate the threaded sleeve 124. The rotation of the threaded sleeve 124 will drive the axis of the nut sleeve 123 to move, and then drive the middle connecting frame beam 113 to move, and the positioning support roller bracket 111 and the outer diameter detection roller bracket 114 on the middle connecting frame beam 113 will move synchronously. The steps are to make the axis of the steel pipe as close as possible to the two conductive contact rollers 134.

[0025] The outer diameter of the steel pipe can be directly obtained by measuring the distance between the pressed outer diameter detection roller 121 and the detection support roller 118. The movement distance of the pressed outer diameter detection roller 121 is consistent with the movement distance of the resistor bar 115. When the resistor bar 115 moves, the relative position of the contact sliding needle 116 on the resistor bar 115 will change. At this time, it is only necessary to apply a DC voltage between one end of the resistor bar 115 and the contact sliding needle 116, and measure the current in the circuit to obtain the resistance value between one end of the resistor bar 115 and the contact sliding needle 116. The resistance value is proportional to the distance between the contact sliding needle 116 and one end of the resistor bar 115, so as to judge the spacing between the pressed outer diameter detection roller 121 and the detection support roller 118, and then the outer diameter of the steel pipe is obtained. Since the axes of all the pressed outer diameter detection rollers 121, the detection support rollers 118, the positioning support rollers 112, and the conductive contact rollers 134 are perpendicular to the movement direction of the steel pipe, the size of the steel pipe can be detected while it is being produced without stopping for detection.

Claims

1. A dimensional inspection system for stainless steel pipe production, characterized in that: The invention comprises a side panel (110), two guide shaft brackets (126) are fixedly mounted on the side panel (110), guide shafts (125) are fixedly mounted on the two guide shaft brackets (126), a threaded sleeve (124) is rotatably sleeved on the outer surface of the guide shaft (125), a nut sleeve (123) is threadedly sleeved on the threaded sleeve (124), the nut sleeve (123) is fixed on the middle connecting frame beam (113), a positioning support roller bracket (111) and an outer diameter detection roller bracket (114) are respectively fixedly mounted on both ends of the middle connecting frame beam (113), a plurality of positioning support rollers (112) are rotatably mounted on the positioning support roller bracket (111), a plurality of detection support rollers (118) are rotatably mounted on the outer diameter detection roller bracket (114), the axes of the detection support rollers (118) and the outer diameter detection roller bracket (114) are in the same horizontal plane, and the outer diameter detection roller bracket (114) and the detection support rollers (118) are used to support steel pipes; Two symmetrically arranged conductive contact rollers (134) are provided between the positioning support roller bracket (111) and the outer diameter detection roller bracket (114); the conductive contact rollers (134) are in rolling conductive cooperation with the upper and lower surfaces of the steel pipe, and the conductive contact rollers (134) are rotatably mounted on the conductive contact roller bracket (133) in a manner that is easy to disassemble; the two conductive contact rollers (134) are in conductive cooperation via the steel pipe, and are used to detect the inner diameter of the steel pipe.

2. A dimensional inspection system for stainless steel pipe production according to claim 1, characterized in that: The side panel (110) is fixedly mounted on the base (109), and a spline rod (128) is also fixedly mounted on the side panel (110). A C-shaped frame (129) is sleeved on the spline rod (128) in a spline sliding manner. Both ends of the top and bottom of the C-shaped frame (129) are threadedly inserted with a pressure-adjusting threaded sleeve (130), and the axis position inside the pressure-adjusting threaded sleeve (130) is slidably inserted into the sliding differential shaft (131).

3. A dimensional inspection system for stainless steel pipe production according to claim 2, characterized in that: The bottom end of the sliding differential shaft (131) is fixedly matched with the conductive contact roller bracket (133), a protrusion (135) is fixed on the conductive contact roller bracket (133), two parallel circular holes are opened on the conductive contact roller bracket (133), limiting plate guide rods (137) are slidably arranged in the two circular holes, the two limiting plate guide rods (137) are fixedly matched with the limiting plate (127), and the limiting plate (127) is rotationally matched with the conductive contact roller (134).

4. A dimensional inspection system for stainless steel pipe production according to claim 3, characterized in that: A tension spring (136) is fixed between the protruding block (135) and the limiting plate (127) for pulling the limiting plate (127) to squeeze the conductive contact roller (134) to prevent the conductive contact roller (134) from falling off the conductive contact roller bracket (133); a squeezing spring (132) is provided around the sliding differential shaft (131); the top end of the squeezing spring (132) is rotatably matched with the voltage regulating threaded sleeve (130) and the conductive contact roller bracket (133), wherein the two ends of the squeezing spring (132) and the voltage regulating threaded sleeve (130) and the conductive contact roller bracket (133) can only rotate in the circumferential direction but cannot move axially.

5. A dimensional inspection system for stainless steel pipe production according to claim 4, characterized in that: A positioning frame (101) is fixedly mounted on the base (109), a sliding suspension rod (107) is fixedly mounted on the top of the positioning frame (101), two positioning roller rotating shafts (106) are symmetrically and movably mounted on the bottom end of the sliding suspension rod (107), a positioning roller (105) for extruding a steel pipe is rotatably sleeved on each positioning roller rotating shaft (106), and a connecting block (104) is fixed on one end of each positioning roller rotating shaft (106) away from the sliding suspension rod (107).

6. A dimensional inspection system for stainless steel pipe production according to claim 5, characterized in that: A downward pressure beam (102) is provided on the sliding sleeve of the sliding suspension rod (107), a downward pressure spring (108) is fixed between the downward pressure beam (102) and the top of the positioning frame (101), and the downward pressure spring (108) is arranged around the outer side of the sliding suspension rod (107), and the two ends of the downward pressure beam (102) are movably connected to the two connecting blocks (104) through a downward pressure connecting rod (103).

7. A dimensional inspection system for stainless steel pipe production according to claim 6, characterized in that: The outer diameter detection roller bracket (114) is also provided with two slide grooves (117), a downward pressing outer diameter detection roller (121) is slidably arranged between the two slide grooves (117), the downward pressing outer diameter detection roller (121) is in contact with the steel pipe and rolling cooperation, the two ends of the downward pressing outer diameter detection roller (121) are rotatably mounted on the two resistance bars (115), a counterweight block (119) is fixed below the two resistance bars (115) via a hanging rod (120), and the counterweight block (119) is located below the outer diameter detection roller bracket (114).

8. A dimensional inspection system for stainless steel pipe production according to claim 7, characterized in that: Two parallel counterweight guide slide bars (122) are fixedly mounted on the lower surface of the outer diameter detection roller bracket (114), and the counterweight (119) is slidably sleeved on the counterweight guide slide bars (122); a contact sliding needle (116) is also arranged on the side of the outer diameter detection roller bracket (114), and the contact sliding needle (116) is in contact and sliding contact with the resistor bar (115) for conductive cooperation.

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