A flange positioner with a double locking device

Abstract

The present application relates to the technical field of welding correction tools, and discloses a flange positioner with a double locking device, which is used to solve the problem of flange offset caused by the flange axis and the pipeline axis not being on the same straight line. By providing a first locking device inside the support cylinder, the first locking device includes a rotating shaft, a mortgage plate, a support spring, a pressing frustum and a threaded connecting column, and the axis of the pipeline is positioned by the first locking device; a second locking device is provided on the positioning plate, and the second locking device includes a fixed hook, a rotating plate and a spiral strip, and the axis of the flange is positioned by the second locking device, so as to ensure that the axes of the pipeline and the flange are on the same straight line, and prevent the phenomenon of flange offset caused by the axes of the pipeline and the flange not being on the same straight line from occurring.

Description

Technical Field

[0001] This application relates to the technical field of welding correction tools, and particularly relates to a flange positioner with a double locking device. Background Art

[0002] A flange is also called a flange convex disc or a flange. A flange is a part used for connecting shafts to each other and is used for connecting pipe ends; there are also flanges used at the inlets and outlets of equipment for connecting two pieces of equipment, such as a reducer flange. Before using flange connection, it is generally necessary to correct the flange first to prevent it from being skewed on the pipeline, and then weld the flange to the pipeline.

[0003] When welding existing flanges, one end of the pipeline is sleeved in the central hole of the flange, and the flange is positioned by a flange positioner to prevent the flange from being skewed, and then the flange is welded to one end of the pipeline by welding; however, since the central hole of the flange is slightly larger than the diameter of the pipeline, after the pipeline is inserted into the central hole of the flange, there will be a certain gap between the outer wall of the pipeline and the central hole of the flange. Under the action of gravity, the axis of the pipeline and the axis of the flange will not be on the same straight line, resulting in a certain offset of the flange after welding. Summary of the Invention

[0004] This application provides a flange positioner with a double locking device, which has the advantage that the axis of the flange and the axis of the pipeline are on the same straight line, so as to solve the problem of flange offset caused by the axis of the flange and the axis of the pipeline not being on the same straight line.

[0005] To achieve the above object, this application adopts the following technical solution: A flange positioner with a double locking device includes a bottom plate, a positioning device, a support device, and a power motor. The positioning device includes: a positioning plate fixedly connected to the upper end of the bottom plate; a support cylinder fixedly connected to one end of the positioning plate close to the support device; a rotating shaft passing through the center of the positioning plate, with one end outside the support cylinder fixedly connected to the output shaft of the power motor, and the other end inside the support cylinder having an external thread; a moving groove opened on the outer wall of the support cylinder and arranged in a circular array; a mortgage plate slidably installed in the moving groove; a support spring, with one end fixedly connected to the end of the mortgage plate close to the positioning plate and the other end fixedly connected to the side wall of the moving groove; an extrusion frustum arranged at the center of several mortgage plates; a threaded connection column having an internal thread, with one end fixedly embedded in the extrusion frustum, and the internal thread being threadedly connected to the external thread of the rotating shaft; a fixing groove opened on the positioning plate and arranged in a circular array; a fixing hook slidably installed in the fixing groove; a rotating plate sleeved on one end of the rotating shaft outside the support cylinder; a spiral strip fixedly installed on the side of the rotating plate close to the positioning plate; a power groove is opened on the side of the fixing hook close to the rotating plate, and the spiral strip is slidably installed in the power groove of the fixing hook.

[0006] Further, an installation groove is provided at the connection between the rotating plate and the rotating shaft. A compression spring is connected in the installation groove. One end of the compression spring close to the axis of the rotating shaft is fixedly connected with a wedge block. The wedge block is inserted into the rotating shaft, and the end of the wedge block inserted into the rotating shaft is an inclined surface.

[0007] Further, the support spring and the compression spring are always in a compressed state.

[0008] Further, the positioning device further includes: a support ring, movably sleeved outside the threaded connection column inside the support cylinder, with one side closely attached to one side of the mortgage plate close to the positioning plate and slidably installed on the inner wall of the support cylinder; an extrusion column, fixedly connected to one side of the support ring close to the positioning plate; a mounting block, fixedly installed on one side of the positioning plate inside the support cylinder; a chute, opened on one side of the mounting block and the positioning plate facing the support ring, and one end of the extrusion column is slidably and sealingly installed in the chute; a return spring, with one end fixedly connected to one end of the extrusion column in the chute and the other end fixedly connected to the side wall of the chute; a support groove is provided on the side wall of the positioning plate close to the support cylinder, and a support block is slidably and sealingly installed in the support groove. A communication hole communicating the chute and the support groove in the same radial direction is opened in the positioning plate, and a transmission fluid is filled in the chute and the support groove.

[0009] Further, a mortgage groove is provided on the side wall of the chute on the mounting block, and a mortgage column is slidably and sealingly installed in the mortgage groove. The top end of the mortgage column penetrates through the support cylinder, and the lengths of the mortgage column extending out of the support cylinder are the same; the top end of the support groove on the positioning plate is a transparent block, and a force-induced color-changing film is fixedly installed on the inner wall of the transparent block.

[0010] Further, the mortgage groove on the mounting block is a stepped groove with smaller diameters at both ends and a larger diameter in the middle. A limit ring is fixedly sleeved outside the middle position of the mortgage column, and the limit ring is slidably and sealingly installed at the position with a larger diameter in the middle of the mortgage groove.

[0011] Further, limit blocks are fixedly installed on both sides of one end of the support block in the support groove.

[0012] Further, a ball is embedded at the end of the mortgage column extending out of the support cylinder.

[0013] Further, the distance from the bottommost end of the support block to the axis of the positioning plate is greater than the distance from the topmost end of the mortgage plate to the axis of the support cylinder.

[0014] The present application has the following beneficial effects:

[0015] 1. A flange positioner with a double-locking device provided by the present application has a first locking device disposed inside a support cylinder. The first locking device includes a rotating shaft, a mortgaging plate, a support spring, a pressing frustum, and a threaded connecting column. The first locking device is used to position the axis of a pipeline. A second locking device is provided on a positioning plate. The second locking device includes a fixed hook, a rotating plate, and a spiral strip. The second locking device is used to position the axis of a flange, thereby ensuring that the axes of the pipeline and the flange are on the same straight line and preventing the occurrence of flange offset caused by the axes of the pipeline and the flange not being on the same straight line.

[0016] 2. A flange positioner with a double-locking device provided by the present application has a support ring disposed inside a support cylinder. An extrusion column is connected to the support ring. One end of the extrusion column is inserted into an installation block. A chute on the installation block communicates with a through hole on the positioning plate. A force-induced color change film and a support block are provided on the positioning plate. After the pressing frustum pushes the mortgaging plate against the inner wall of the pipeline, the pressing frustum drives the mortgaging plate and the pipeline to move towards the central hole of the flange. At the same time, the mortgaging plate pushes the extrusion column, and the moving extrusion column pushes the transmission fluid in the chute, thereby pushing the support block to move, so that the support block squeezes the flange. One side of the flange is squeezed by the support block, and the other side is hooked by the fixed hook, thereby positioning the flange and preventing the flange from moving or skewing during welding, thus avoiding the production of unqualified products after welding.

[0017] 3. A flange positioner with a double-locking device provided by the present application has a sliding mortgaging column disposed on the side wall of a chute of an installation block, and a force-induced color change film is provided at the top of the through hole. When the extrusion column squeezes the transmission fluid in the chute, the transmission fluid first pushes the mortgaging column against the inner wall of the pipeline, and then the transmission fluid flows into the through hole, thereby squeezing the force-induced color change film. By observing the color changes of several force-induced color change films, the extrusion force received by the force-induced color change film is judged, so as to judge whether the moving distances of the mortgaging columns against the inner wall of the pipeline are the same, and finally judge whether the axis of the pipeline is offset. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings forming a part of the specification depict the embodiments disclosed in the present application and, together with the specification, are used to explain the principles disclosed in the present application.

[0019] Referring to the drawings, the present disclosure can be more clearly understood according to the following detailed description, wherein:

[0020] Figure 1 is a schematic three-dimensional structure diagram of the present invention;

[0021] Figure 2 is a schematic structural diagram of the positioning device of the present invention;

[0022] Figure 3 is a sectional view of the positioning device of the present invention;

[0023] Figure 4 For the present invention Figure 3 Enlarged view of the local structure at position A in the present invention;

[0024] Figure 5 Left view of the cross-section of the positioning device of the present invention;

[0025] Figure 6 For the present invention Figure 5 Enlarged view of the local structure at position B in the present invention.

[0026] In the figure: 1, bottom plate; 2, positioning device; 201, positioning plate; 202, support cylinder; 203, rotating shaft; 204, mortgage plate; 205, support spring; 206, extrusion frustum; 207, threaded connection column; 208, fixed hook; 209, rotating plate; 210, spiral strip; 211, compression spring; 212, wedge block; 213, support ring; 214, extrusion column; 215, mounting block; 216, reset spring; 217, communication hole; 218, force-induced color change film; 219, support block; 220, mortgage column; 3, support device; 4, power motor. Specific embodiments

[0027] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present application.

[0028] Embodiment 1

[0029] Please refer to Figure 1 , a flange positioner with a double-locking device, including a bottom plate 1, a positioning device 2, a support device 3 and a power motor 4. A support device 3 is fixedly installed on one side of the upper end surface of the bottom plate 1, and the support device 3 is used to support the pipeline. A positioning device 2 is fixedly installed on the other side of the upper end surface of the bottom plate 1, and a power motor 4 for driving the positioning device 2 is fixedly installed at one end of the positioning device 2.

[0030] Please refer to Figures 1-4, the positioning device 2 includes a positioning plate 201 and a support cylinder 202. The positioning plate 201 is fixedly connected to the upper end of the bottom plate 1. One end of the positioning plate 201 close to the support device 3 is fixedly connected with a support cylinder 202. The axes of the positioning plate 201 and the support cylinder 202 are on the same straight line. A first locking device is arranged in the support cylinder 202. The first locking device includes a rotating shaft 203, a mortgaging plate 204, a support spring 205, a pressing frustum 206 and a threaded connection column 207. The rotating shaft 203 penetrates through the center of the positioning plate 201. One end of the rotating shaft 203 outside the support cylinder 202 is fixedly connected to the output shaft of the power motor 4. An external thread is provided at one end of the rotating shaft 203 inside the support cylinder 202. A plurality of moving grooves arranged in an annular array are provided on the outer wall of the support cylinder 202 away from the positioning plate 201. A mortgaging plate 204 is slidably installed in the moving groove. One end of the mortgaging plate 204 close to the positioning plate 201 is fixedly connected with a support spring 205. The other end of the support spring 205 is fixedly connected to the side wall of the moving groove. A pressing frustum 206 is arranged at the center of several mortgaging plates 204. A strip-shaped groove is provided on the inclined surface of the pressing frustum 206. One side of the mortgaging plate 204 inside the support cylinder 202 is slidably installed in the strip-shaped groove of the pressing frustum 206. A threaded connection column 207 is fixedly embedded at one end of the pressing frustum 206 close to the positioning plate 201. An internal thread is provided in the threaded connection column 207. The external thread of the rotating shaft 203 is threadedly connected with the internal thread of the threaded connection column 207. A second locking device is arranged on the positioning plate 201. The second locking device includes a fixed hook 208, a rotating plate 209 and a spiral strip 210. Fixed grooves arranged in an annular array are provided on the positioning plate 201. The fixed hook 208 is slidably installed in the fixed groove. The fixed hook 208 can move in the radial direction of the positioning plate 201. A rotating plate 209 is sleeved on one end of the rotating shaft 203 outside the support cylinder 202. A spiral strip 210 is fixedly installed on one side of the rotating plate 209 close to the positioning plate 201. A power groove is provided on one side of the fixed hook 208 close to the rotating plate 209. The spiral strip 210 is slidably installed in the power groove of the fixed hook 208. When the spiral strip 210 rotates with the rotating plate 209, it will push the fixed hook 208 to move in the fixed groove of the positioning plate 201.

[0031] Please refer to Figure 4 , an installation groove is provided at the connection between the rotating plate 209 and the rotating shaft 203. A compression spring 211 is connected in the installation groove. One end of the compression spring 211 close to the axis of the rotating shaft 203 is fixedly connected with a wedge-shaped block 212. The wedge-shaped block 212 is inserted into the rotating shaft 203. One end of the wedge-shaped block 212 inserted into the rotating shaft 203 is an inclined surface.

[0032] The supporting spring 205 and the compression spring 211 are always in a compressed state. The compressed supporting spring 205 provides a large supporting force for the mortgage plate 204. When the rotating shaft 203 is rotated to pull the threaded connection column 207 and the extrusion frustum 206 to extrude the mortgage plate 204, it prevents the extrusion frustum 206 from driving the mortgage plate 204 to move towards the positioning plate 201 when there is a small extrusion force on the mortgage plate 204 by the extrusion frustum 206; the compressed compression spring 211 provides a supporting force for the wedge block 212, enabling the rotating shaft 203 to drive the wedge block 212 and the rotating plate 209 to rotate when the rotating shaft 203 rotates. When the spiral bar 210 and the rotating plate 209 are restricted from moving, the rotating rotating shaft 203 pushes the wedge block 212 to squeeze the compression spring 211 into the installation groove of the rotating plate 209, preventing the wedge block 212 from hindering the rotation of the rotating shaft 203.

[0033] The working principle of the first embodiment of the present invention is as follows:

[0034] Please refer to Figures 1-4 , before welding the pipeline and the flange, the flange is sleeved on the supporting cylinder 202, and the flange is located between several fixing hooks 208. The pipeline is placed on the supporting device 3, and the pipeline is moved to a suitable position through the supporting device 3. At the same time, one end of the pipeline is movably sleeved on the positioning device 2;

[0035] At this time, the power motor 4 is started, and the power motor 4 drives the rotating shaft 203 to rotate. The rotating rotating shaft 203 drives the rotating plate 209 rotating rod, and the rotating plate 209 drives the spiral bar 210 to rotate synchronously, so that the spiral bar 210 squeezes the power groove of the fixing hook 208, driving the fixing hook 208 to move towards the axis of the positioning plate 201 until several fixing hooks 208 squeeze the side wall of the flange, thereby positioning the flange. The axis of the flange and the axis of the positioning plate 201 are on the same straight line; at the same time, since the mortgage plate 204, the extrusion frustum 206 and the threaded connection column 207 are restricted by the supporting cylinder 202 and cannot rotate, the rotating rotating shaft 203 is screwed into the threaded connection column 207, so that the rotating shaft 203 pulls the threaded connection column 207 and the extrusion frustum 206 to move towards the positioning plate 201. The moving extrusion frustum 206 squeezes the side wall of the mortgage plate 204 inside the supporting cylinder 202, causing the mortgage plate 204 to slide out of the supporting cylinder 202 until the outer walls of several mortgage plates 204 are tightly attached to the inner wall of the pipeline, thereby positioning the pipeline, making the axis of the pipeline and the axis of the supporting cylinder 202 on the same straight line, so that the axes of the pipeline and the flange are on the same straight line, preventing the phenomenon of flange offset caused by the axes of the pipeline and the flange not being on the same straight line.

[0036] Embodiment Two

[0037] Embodiment Two is a further improvement based on Embodiment One.

[0038] Different from the first embodiment, please refer to Figures 3-6 , a support ring 213 is movably sleeved outside the threaded connection column 207 in the support cylinder 202. One side of the support ring 213 is closely attached to one side of the mortgage plate 204 close to the positioning plate 201. A slide plate is fixedly connected to the side wall of the support ring 213, and the slide plate is slidably connected to the inner wall of the support cylinder 202. A plurality of extrusion columns 214 arranged in a circular array are fixedly connected to the side of the support ring 213 close to the positioning plate 201; an installation block 215 is fixedly installed on one side of the positioning plate 201 in the support cylinder 202. The installation block 215 and the positioning plate 201 are integrally cast. The side wall of the installation block 215 is hermetically installed with the inner wall of the support cylinder 202. A plurality of chutes arranged in a circular array are formed on the sides of the installation block 215 and the positioning plate 201 facing the support ring 213. One end of the extrusion column 214 is slidably and hermetically installed in the chute. One end of the extrusion column 214 in the chute is fixedly connected to a return spring 216, and the other end of the return spring 216 is fixedly connected to the side wall of the chute; a plurality of support grooves are formed in an annular array on the side wall of the positioning plate 201 close to the support cylinder 202. A support block 219 is slidably and hermetically installed in the support groove. A communication hole 217 communicating the chute and the support groove in the same radial direction is formed in the positioning plate 201. The chute and the support groove are filled with transmission fluid.

[0039] Please refer to Figure 6 , a mortgage groove is formed in the side wall of the chute on the installation block 215. A mortgage column 220 is slidably and hermetically installed in the mortgage groove. The top end of the mortgage column 220 penetrates through the support cylinder 202, and the lengths of the mortgage column 220 extending out of the support cylinder 202 are the same; the top end of the support groove on the positioning plate 201 is provided with a transparent block, and a force-induced color change film 218 is fixedly installed on the inner wall of the transparent block.

[0040] The force-induced color change film 218 is a special material whose color or optical properties change under the action of an external force. Specifically, when the force-induced color change film 218 is subjected to an external force (such as stretching, compression, etc.), the internal molecular structure or arrangement thereof changes, resulting in a change in the light absorption, reflection or transmission characteristics of the material, and thus presenting different colors.

[0041] The mortgage groove on the installation block 215 is a stepped groove with a small diameter at both ends and a large diameter in the middle. A limit ring is fixedly sleeved outside the middle position of the mortgage column 220, and the limit ring is slidably and hermetically installed at the position with a larger diameter in the middle of the mortgage groove. The limit ring provides a limit for the mortgage column 220 to prevent the mortgage column 220 from sliding into the chute of the installation block 215 or sliding out of the mortgage groove.

[0042] The support block 219 is fixedly installed with limit blocks on both sides of one end of the support groove. The limit blocks prevent the support block 219 from sliding out of the support groove, and at the same time, are used to limit the support block 219 to prevent the support block 219 from being close to the innermost side of the support groove, thereby preventing the transmission fluid in the connecting hole 217 from squeezing the color-changing film 218.

[0043] The end of the mortgage column 220 extending out of the support tube 202 is embedded with a ball, which reduces the friction between the top of the mortgage column 220 and the inner wall of the pipe, reduces the friction damage of the top of the mortgage column 220, and thus increases the accuracy.

[0044] The distance between the bottom end of the support block 219 and the axis of the positioning plate 201 is greater than the distance between the top end of the mortgage plate 204 and the axis of the support tube 202. Ensure that the support block 219 is outside the pipeline, and when the support block 219 is pushed out, it can support the side wall of the flange and fix the flange.

[0045] The working principle of the second embodiment of the present invention is as follows:

[0046] See also Figures 1-6 After the flange is set between a plurality of fixed hooks 208 and one end of the pipe is movably sleeved on the positioning device 2, the power motor 4 is started, and the power motor 4 drives the rotating shaft 203 to rotate, so that the rotating plate 209 and the spiral strip 210 drive the fixed hook 208 to position the flange, and the rotating shaft 203 pulls the threaded connection column 207 and the extrusion round table 206, so that the extrusion round table 206 squeezes the mortgage plate 204 to position the pipe; then, the rotating shaft 203 is continuously rotated, and the rotating shaft 203 is continuously screwed into the threaded connection column 207, so that the rotating shaft 203 pulls The threaded connection column 207 and the extrusion truncated stage 206 move toward the positioning plate 201. Since the mortgage plate 204 has already tightly squeezed the inner wall of the pipe, the moving extrusion truncated stage 206 cannot continue to push the mortgage plate 204 to move outward. At this time, the extrusion truncated stage 206 will drive the mortgage plate 204 to squeeze the support spring 205, so that the mortgage plate 204 drives the pipe to move toward the positioning plate 201, so that one end of the pipe is automatically inserted into the center hole of the flange until one end of the pipe pushes against the positioning plate 201 and stops moving, thus saving the step of manually inserting the pipe into the center hole of the flange.

[0047] At the same time, when the mortgage plate 204 moves toward the positioning plate 201, the mortgage plate 204 will push the support ring 213 and the extrusion column 214 to move, and the moving extrusion column 214 squeezes the transmission fluid in the slide groove, so that the transmission fluid squeezes the support block 219 through the connecting hole 217, and the support block 219 slides toward the flange, so that a plurality of support blocks 219 squeeze the flange at the same time, one end of the flange is squeezed by the support block 219, and the other end of the flange is fixed by the hook part of the fixing hook 208, thereby completing the fixing of the flange, preventing the flange from moving or skewing during subsequent welding, thereby avoiding the occurrence of unqualified products after welding;

[0048] While the transmission fluid is being extruded in the extrusion chute of the extrusion column 214, the transmission fluid will first push the mortgage column 220 to move, so that the top end of the mortgage column 220 abuts against the inner wall of the pipeline. Since a part of the transmission fluid enters the mortgage groove of the mortgage column 220, the distance that the mortgage column 220 slides out is judged by the extrusion force of the transmission fluid on the force-induced color change film 218. If the distances that the mortgage column 220 slides out are the same, the amount of the transmission fluid entering the mortgage groove of the mortgage column 220 is the same, and the extrusion force of the transmission fluid on the force-induced color change film 218 is the same. At this time, the colors of several force-induced color change films 218 are within the error range, indicating that the axis of the pipeline is on the same straight line as the axis of the support cylinder 202; if the distances that the mortgage column 220 slides out are different, the amount of the transmission fluid entering the mortgage groove of the mortgage column 220 is different, and the extrusion force of the transmission fluid on the force-induced color change film 218 is different. At this time, the colors of several force-induced color change films 218 are different, indicating that the axis of the pipeline is not on the same straight line as the axis of the support cylinder 202 and needs to be readjusted.

Claims

1. A flange positioner with a double locking device, comprising a bottom plate (1), a positioning device (2), a supporting device (3) and a power motor (4), characterized in that: The positioning device (2) includes: A positioning plate (201), fixedly connected to the upper end of the bottom plate (1); A support cylinder (202), fixedly connected to one end of the positioning plate (201) close to the support device (3); A rotating shaft (203), passing through the center of the positioning plate (201), with one end outside the support cylinder (202) fixedly connected to the output shaft of the power motor (4), and one end inside the support cylinder (202) provided with an external thread; Moving grooves, opened on the outer wall of the support cylinder (202), arranged in an annular array; A mortgage plate (204), slidably installed in the moving grooves; A support spring (205), with one end fixedly connected to one end of the mortgage plate (204) close to the positioning plate (201), and the other end fixedly connected to the side wall of the moving groove; An extrusion frustum (206), arranged at the center of a plurality of mortgage plates (204); A threaded connection column (207), provided with an internal thread, with one end fixedly embedded in the extrusion frustum (206), and the internal thread threadedly connected to the external thread of the rotating shaft (203); Fixed grooves, opened on the positioning plate (201), arranged in an annular array; Fixed hooks (208), slidably installed in the fixed grooves; A rotating plate (209), sleeved on one end of the rotating shaft (203) outside the support cylinder (202); A spiral strip (210), fixedly installed on one side of the rotating plate (209) close to the positioning plate (201); A power groove is opened on one side of the fixed hook (208) close to the rotating plate (209), and the spiral strip (210) is slidably installed in the power groove of the fixed hook (208); The positioning device (2) further includes: A support ring (213), movably sleeved outside the threaded connection column (207) inside the support cylinder (202), with one side close to one side of the mortgage plate (204) close to the positioning plate (201), and slidably installed with the inner wall of the support cylinder (202); An extrusion column (214), fixedly connected to one side of the support ring (213) close to the positioning plate (201); An installation block (215), fixedly installed on one side of the positioning plate (201) inside the support cylinder (202); A sliding groove is opened on one side of the installation block (215) and the positioning plate (201) facing the support ring (213), and one end of the extrusion column (214) is slidably and sealingly installed in the sliding groove; A reset spring (216), with one end fixedly connected to one end of the extrusion column (214) inside the sliding groove, and the other end fixedly connected to the side wall of the sliding groove; Support grooves arranged in an annular array are opened on the side wall of the positioning plate (201) close to the support cylinder (202), support blocks (219) are slidably and sealingly installed in the support grooves, communication holes (217) connecting the sliding grooves and the support grooves in the same radial direction are opened in the positioning plate (201), and transmission fluid is filled in the sliding grooves and the support grooves; A mortgage groove is opened on the side wall of the sliding groove on the installation block (215), a mortgage column (220) is slidably and sealingly installed in the mortgage groove, the top end of the mortgage column (220) penetrates through the support cylinder (202), and the lengths of the mortgage column (220) extending out of the support cylinder (202) are the same; The top of the support groove on the positioning plate (201) is provided with a transparent block, and a force-induced color change film (218) is fixedly installed on the inner wall of the transparent block.

2. The flange positioner of a double locking device according to claim 1, characterized in that: An installation groove is formed at the connection between the rotating plate (209) and the rotating shaft (203). A compression spring (211) is connected in the installation groove. One end of the compression spring (211) close to the axis of the rotating shaft (203) is fixedly connected with a wedge-shaped block (212). The wedge-shaped block (212) is inserted into the rotating shaft (203), and the end of the wedge-shaped block (212) inserted into the rotating shaft (203) is an inclined surface.

3. The flange positioner of a double-locking device according to claim 1, characterized in that: The support spring (205) and the compression spring (211) are always in a compressed state.

4. The flange positioner of a double locking device according to claim 1, characterized in that: The mortgage groove on the mounting block (215) is a stepped groove with smaller diameters at both ends and a larger diameter in the middle. A limiting ring is fixedly sleeved on the outer side of the middle position of the mortgage column (220), and the limiting ring is slidably and sealingly installed at the position with the larger diameter in the middle of the mortgage groove.

5. The flange positioner of a double-locking device according to claim 1, characterized in that: Limit blocks are fixedly installed on both sides of one end of the support block (219) located in the support groove.

6. The flange positioner of a double locking device according to claim 1, characterized in that: A ball is embedded at the end of the mortgage column (220) extending out of the support cylinder (202).

7. The flange positioner of a double-locking device according to claim 1, characterized in that: The distance from the bottommost end of the support block (219) to the axis of the positioning plate (201) is greater than the distance from the topmost end of the mortgage plate (204) to the axis of the support cylinder (202).

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