A dimensional inspection system for stainless steel pipe production

Abstract

The present invention discloses a size inspection system for stainless steel pipe production, which relates to the technical field of stainless steel pipe detection. In the present invention, the outer diameter detection roller is pressed down and cooperates with the detection support roller to obtain the outer diameter of the steel pipe by using the resistance strip and the contact sliding needle; the inner diameter and wall thickness are measured by forming a closed loop with the adjustable conductive contact roller. The axes of all rollers are perpendicular to the movement direction of the steel pipe, ensuring accurate on-line size detection during continuous production, and can be adapted to various specifications of steel pipes through rapid replacement and structural adjustment, greatly improving the detection efficiency and quality.

Description

Technical Field

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

[0002] In the current industry, the common methods for detecting the size of stainless steel pipes mostly involve stopping production for spot checks or separately detecting the outer diameter and inner diameter using a manual vernier caliper and ultrasonic equipment, etc. For the measurement of the outer diameter, it is necessary to manually measure each position of the steel pipe frequently and measure it section by section using various diameter measuring instruments; for the measurement of the inner diameter, since only the inner diameters at both ends of the steel pipe can be measured, if it is necessary to measure the inner diameter at the middle position of the steel pipe, the sample needs to be cut for detection. This not only increases the complexity of the measurement process, but also leads to a decrease in production efficiency and an increase in costs. More importantly, it is difficult to achieve fast, continuous, and accurate real-time monitoring by manual methods, and problems such as measurement lag, missed detection, and deviation in data accuracy often occur. Once a deviation or defect occurs, the entire batch of steel pipes may face quality risks, resulting in waste of materials and time, and unable to meet the requirements of simultaneously improving product quality and efficiency. Summary of the Invention

[0003] To overcome the defects of the above-mentioned prior art, the present invention provides the following technical solution: A size inspection system for stainless steel pipe production, including a side panel, on which two guiding shaft brackets are fixedly installed. On both guiding shaft brackets, guiding shafts are fixedly installed. A threaded sleeve is rotatably sleeved on the outer surface of the guiding shaft. A nut sleeve is threadedly sleeved on the threaded sleeve, and the nut sleeve is fixed on the middle connecting frame beam. At both ends of the middle connecting frame beam, a positioning support roller bracket and an outer diameter detection roller bracket are respectively fixedly installed. A plurality of positioning support rollers are rotatably installed on the positioning support roller bracket, and 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. The outer diameter detection roller bracket and the detection support rollers 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 in rolling conductive cooperation with the upper and lower surfaces of the steel pipe, and the conductive contact rollers are rotatably installed on the conductive contact roller bracket in a manner that is convenient for disassembly. The two conductive contact rollers are conductively cooperated through the steel pipe to detect the inner diameter of the steel pipe.

[0004] Preferably, the side panel is fixedly installed on the base, and a spline rod is also fixedly installed on the side panel. A C-shaped frame is sleeved on the spline rod in a spline sliding manner. At both ends of the top and bottom of the C-shaped frame, pressure regulating threaded sleeves are threadedly inserted and matched. A sliding differential shaft is slidably inserted and matched at the axial position inside the pressure regulating threaded sleeve.

[0005] Preferably, the bottom end of the sliding differential shaft is fixedly fitted with the conductive contact roller bracket. A raised block is fixed on the conductive contact roller bracket. Two parallel circular holes are formed in the conductive contact roller bracket. Restricting plate guiding rods are slidably arranged in both of the two circular holes. The two restricting plate guiding rods are fixedly fitted with the restricting plate. The restricting plate is rotatably fitted with the conductive contact roller.

[0006] Preferably, a tension spring is fixed between the raised block and the restricting plate for pulling the restricting plate to press the conductive contact roller to prevent the conductive contact roller from falling off the conductive contact roller bracket. An extrusion spring is sleeved around the sliding differential shaft. The top end of the extrusion spring is rotatably fitted with the pressure regulating threaded sleeve and the conductive contact roller bracket. The two ends of the extrusion spring can only rotate circumferentially and cannot move axially with respect to the pressure regulating threaded sleeve and the conductive contact roller bracket.

[0007] Preferably, a positioning frame is fixedly installed on the base. A sliding suspension rod is fixedly installed at the top of the positioning frame. Two positioning roller rotating shafts are symmetrically and movably installed at the bottom end of the sliding suspension rod. Positioning rollers for pressing the steel pipe are rotatably sleeved on each positioning roller rotating shaft. A connecting block is fixed at one end of each positioning roller rotating shaft away from the sliding suspension rod.

[0008] Preferably, a pressing beam is slidably sleeved on the sliding suspension rod. A pressing spring is fixed between the pressing beam and the top of the positioning frame. The pressing spring is arranged around the outside of the sliding suspension rod. The two ends of the pressing beam are movably connected to the two connecting blocks through pressing connecting rods.

[0009] Preferably, two chutes are further formed in the outer diameter detection roller bracket. A pressing outer diameter detection roller is slidably arranged between the two chutes. The pressing outer diameter detection roller is in rolling contact with the steel pipe. The two ends of the pressing outer diameter detection roller are rotatably installed on two resistance strips. A counterweight is fixed below the two resistance strips through a suspension rod. The counterweight is located below the outer diameter detection roller bracket.

[0010] Preferably, two parallel counterweight guiding sliding rods are fixedly installed on the lower surface of the outer diameter detection roller bracket. The counterweight is slidably sleeved on the counterweight guiding sliding rods. A contact sliding needle is further arranged on the side of the outer diameter detection roller bracket. The contact sliding needle is in sliding conductive contact with the resistance strip.

[0011] The present invention has the following beneficial effects compared with the prior art: (1) The present invention utilizes the cooperation between the downward pressing outer diameter detection roller and the detection support roller. By the movement of the resistance strip and the contact sliding needle, the outer diameter of the steel pipe is measured in real time, and the outer diameter change data can be automatically obtained during the continuous movement of the steel pipe. Since there is no need to stop production or repeatedly measure manually, 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 circuit through the surfaces of two conductive contact rollers and the steel pipe, and then combines the cooperation of the sliding difference shaft and the pressure regulating threaded sleeve to achieve precise 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 condition of different parts can be quickly determined. 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 the current magnitude has a simple structure and a fast response speed, effectively improving the detection efficiency and accuracy of the inner diameter; (3) When replacing steel pipes with different diameters in the present invention, only by pulling the limiting plate to disassemble and assemble the conductive contact rollers of the corresponding size, and cooperating with rotating the threaded sleeve to adjust the position of the middle connecting frame beam, 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 different steel pipe specifications need to be adapted; (4) The axes of all the rollers 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 the continuous production process. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0013] Figure 2 For the present invention Figure 1 is a schematic diagram of the structure at position A in the present invention.

[0014] Figure 3 is a schematic diagram of the structure at the counterweight guiding slide bar of the present invention.

[0015] Figure 4 For the present invention Figure 3 is a schematic diagram of the structure at position B in the present invention.

[0016] Figure 5 For the present invention Figure 3 is a schematic diagram of the structure at position C in the present invention.

[0017] Figure 6 is a schematic diagram of the structure at the spline shaft of the present invention.

[0018] Figure 7 For the present invention Figure 6 is a schematic diagram of the structure at position D in the present invention.

[0019] Figure 8This is a schematic diagram of the structure at the sliding groove of the present invention.

[0020] In the figure: 101 - positioning frame; 102 - lower pressing beam; 103 - lower pressing connecting rod; 104 - connecting block; 105 - positioning roller; 106 - positioning roller rotating shaft; 107 - sliding suspension rod; 108 - lower pressing spring; 109 - base; 110 - side panel; 111 - positioning support roller bracket; 112 - positioning support roller; 113 - intermediate connecting frame beam; 114 - outer diameter detection roller bracket; 115 - resistance strip; 116 - contact sliding needle; 117 - sliding groove; 118 - detection support roller; 119 - counterweight; 120 - lifting rod; 121 - lower pressing outer diameter detection roller; 122 - counterweight guiding slide rod; 123 - nut sleeve; 124 - threaded sleeve; 125 - guiding shaft; 126 - guiding 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 - protruding block; 136 - tension spring; 137 - limiting plate guiding insertion rod. Detailed implementation manners

[0021] The following combines with the attached Figure 1-8 drawings and further illustrates the technical solution of the present invention through specific implementation manners.

[0022] The present invention provides a size inspection system for stainless steel pipe production, including side panels 110. Two guide shaft brackets 126 are fixedly installed on the side panels 110. Guide shafts 125 are fixedly installed on both of 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 intermediate connecting frame beam 113. Positioning support roller brackets 111 and outer diameter detection roller brackets 114 are respectively fixedly installed at both ends of the intermediate connecting frame beam 113. A plurality of positioning support rollers 112 are rotatably installed on the positioning support roller brackets 111. A plurality of detection support rollers 118 are rotatably installed on the outer diameter detection roller brackets 114. The axes of the detection support rollers 118 and the outer diameter detection roller brackets 114 are in the same horizontal plane. The outer diameter detection roller brackets 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 brackets 111 and the outer diameter detection roller brackets 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 installed on the conductive contact roller brackets 133 in a manner that is convenient for disassembly. The two conductive contact rollers 134 are conductively cooperated through the steel pipe, and are used to detect the inner diameter of the steel pipe. The side panels 110 are fixedly installed on the base 109. A spline rod 128 is also fixedly installed on the side panels 110. A C-shaped frame 129 is sleeved on the spline rod 128 in a spline sliding manner. Pressure regulating threaded sleeves 130 are threadedly inserted and matched at both ends of the top and bottom of the C-shaped frame 129. A sliding difference shaft 131 is slidably inserted and matched at the axial position inside the pressure regulating threaded sleeve 130. The bottom end of the sliding difference shaft 131 is fixedly cooperated with the conductive contact roller bracket 133. A raised block 135 is fixed on the conductive contact roller bracket 133. Two parallel circular holes are opened on the conductive contact roller bracket 133. Restricting plate guide insertion rods 137 are slidably arranged in both of the two circular holes. The two restricting plate guide insertion rods 137 are fixedly cooperated with a restricting plate 127. The restricting plate 127 is rotatably cooperated with the conductive contact roller 134. A tension spring 136 is fixed between the raised block 135 and the restricting plate 127, and is used to pull the restricting plate 127 to press the conductive contact roller 134 to prevent the conductive contact roller 134 from falling off the conductive contact roller bracket 133. An extrusion spring 132 is circumferentially sleeved on the sliding difference shaft 131. The top end of the extrusion spring 132 is rotationally cooperated with the pressure regulating threaded sleeve 130 and the conductive contact roller bracket 133. The two ends of the extrusion spring 132 can only rotate circumferentially with the pressure regulating threaded sleeve 130 and the conductive contact roller bracket 133 and cannot move axially.A positioning frame 101 is fixedly installed on a base 109. A sliding suspension rod 107 is fixedly installed at the top of the positioning frame 101. Two positioning roller rotating shafts 106 are symmetrically and movably installed at 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. A connecting block 104 is fixed at one end of each positioning roller rotating shaft 106 away from the sliding suspension rod 107. A pressing beam 102 is slidably sleeved on the sliding suspension rod 107. A pressing spring 108 is fixed between the pressing beam 102 and the top of the positioning frame 101. The pressing spring 108 is arranged around the outside of the sliding suspension rod 107. The two ends of the pressing beam 102 are movably connected to the two connecting blocks 104 through a pressing connecting rod 103. Two sliding grooves 117 are also formed on an outer diameter detection roller support 114. A pressing outer diameter detection roller 121 is slidably arranged between the two sliding grooves 117. The pressing outer diameter detection roller 121 is in rolling contact with the steel pipe. The two ends of the pressing outer diameter detection roller 121 are rotatably installed on two resistance strips 115. A counterweight 119 is fixed below the two resistance strips 115 through a suspension rod 120. The counterweight 119 is located below the outer diameter detection roller support 114. Two parallel counterweight guiding sliding rods 122 are fixedly installed on the lower surface of the outer diameter detection roller support 114. The counterweight 119 is slidably sleeved on the counterweight guiding sliding rods 122. A contact sliding needle 116 is also arranged on the side of the outer diameter detection roller support 114. The contact sliding needle 116 is in sliding conductive contact with the resistance strip 115.

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

[0024] During use, rotate the pressure-regulating threaded sleeve 130. When the pressure-regulating threaded sleeve 130 rotates on the C-shaped frame 129, it will displace along its own axial direction, and then drive the conductive contact roller 134 to move towards the surface of the steel pipe. After the conductive contact roller 134 contacts the surface of the steel pipe, continue to rotate the pressure-regulating threaded sleeve 130, so that the sliding differential shaft 131 is compressed, and a certain pressure is applied between the conductive contact roller 134 and the surface of the steel pipe (to ensure that the extrusion force between the conductive contact roller 134 and the steel pipe is consistent when facing steel pipes with different outer diameters). At this time, a closed circuit 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 magnitude of the current). When the steel pipe moves along the axial direction, the steel pipe 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 larger the wall thickness of the steel pipe, the smaller the resistance of the circuit 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 with different diameters need to be matched with conductive contact rollers 134 of appropriate sizes to ensure effective contact between the conductive contact rollers 134 and the surface of the steel pipe. Specifically, to replace the conductive contact roller 134, 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, 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 this shaft). At the same time, the threaded sleeve 124 needs to be rotated. The rotation of the threaded sleeve 124 will drive the nut sleeve 123 to move axially, and then drive the intermediate connecting frame beam 113 to move. The positioning support roller bracket 111 and the outer diameter detection roller bracket 114 on the intermediate connecting frame beam 113 will move synchronously. The step is to make the axis of the steel pipe as much as possible between the two conductive contact rollers 134.

[0025] The outer diameter of the steel pipe can be directly obtained by measuring the distance between the downward pressing outer diameter detection roller 121 and the detection support roller 118. The movement distance of the downward pressing outer diameter detection roller 121 is the same as that of the resistance strip 115. When the resistance strip 115 moves, it will change the relative position of the contact sliding needle 116 on the resistance strip 115. At this time, only a DC voltage needs to be applied between one end of the resistance strip 115 and the contact sliding needle 116, and the magnitude of the current in this circuit is measured to know the resistance value between one end of the resistance strip 115 and the contact sliding needle 116. This resistance value is proportional to the distance between the contact sliding needle 116 and one end of the resistance strip 115, so as to judge the distance between the downward pressing outer diameter detection roller 121 and the detection support roller 118, and then know the outer diameter of the steel pipe. Since the axes of all the downward pressing outer diameter detection rollers 121, detection support rollers 118, positioning support rollers 112, and conductive contact rollers 134 are perpendicular to the movement direction of the steel pipe in space, the steel pipe can be detected for its size while 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; The outer diameter detection roller bracket (114) is 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 and rolling cooperation with the steel pipe, and the two ends of the downward pressing outer diameter detection roller (121) are rotatably mounted on two resistor bars (115), a counterweight block (119) is fixed below the two resistor bars (115) via a hanging rod (120), and the counterweight block (119) is located below the outer diameter detection roller bracket (114); two parallel counterweight block guide slide bars (122) are fixedly mounted on the lower surface of the outer diameter detection roller bracket (114), and the counterweight block (119) is slidably sleeved on the counterweight block 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) is in contact and sliding cooperation with the resistor bar (115) for conductive conduction.

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).

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