A groove elbow connection locator

Abstract

The present invention provides a groove elbow connection locator, which belongs to the technical field of pipeline installation. Its technical solution is: a groove elbow connection locator, characterized in that it includes a clamping mechanism clamped on the outer wall of the fixed pipe section and a centering mechanism that can be set inside the elbow, the centering mechanism and the clamping mechanism are connected by a connecting piece, the clamping mechanism includes two clamping plates symmetrically arranged on the outside of the fixed pipe section, and two clamping blocks are symmetrically arranged on the opposite surfaces of the two clamping plates. The symmetry lines of the two clamping blocks on the same clamping plate, the diameter of the fixed pipe section, the connecting piece and the axis of the centering mechanism can be on the same plane, which can be vertical or parallel to the ground. The beneficial effect of the present invention is: it is convenient to position the groove elbow when the groove elbow is installed.

Description

Technical Field

[0001] The invention belongs to the technical field of pipeline installation, and in particular relates to a groove elbow connection locator. Background Art

[0002] Elbows are pipe fittings that change the direction of pipes in piping systems, including groove elbows and flange elbows, with the most commonly used being 90-degree elbows. The connection of flange elbows requires welding flanges and then connecting them with bolts, which is a complicated process and has low construction efficiency; groove elbows are connected in the form of clamps, which is simple and easy to install. When using clamps to connect groove elbows and pipe sections, after the position of a pipe section has been determined, when installing the elbow, it is necessary to keep the other end of the elbow in a horizontal or vertical state. However, since there are no bolt holes for positioning, the elbow cannot be well positioned relative to the pipe section, resulting in deviation of the elbow, that is, the other end of the elbow is in a tilted state, affecting the later installation with another pipe section. Summary of the invention

[0003] The object of the present invention is to provide a groove elbow connection positioner which is convenient for positioning the groove elbow when the groove elbow is installed.

[0004] The present invention is achieved through the following measures: a groove elbow connection locator, characterized in that it includes a clamping mechanism clamped on the outer wall of a fixed pipe section and a centering mechanism that can be arranged inside the elbow, the centering mechanism and the clamping mechanism are connected by a connecting piece, the clamping mechanism includes two clamping plates symmetrically arranged on the outside of the pipe section, two clamping blocks are symmetrically arranged on the opposite surfaces of the two clamping plates, the symmetry lines of the two clamping blocks on the same clamping plate, the diameter of the fixed pipe section, the connecting piece and the axis of the centering mechanism can be on the same plane, and the plane can be perpendicular or parallel to the ground.

[0005] The clamping mechanism includes a support and a bidirectional screw rotatably arranged on the support, two clamping plates are arranged at both ends of the bidirectional screw by threaded connection, a strip opening for limiting the rotation of the clamping plates is arranged on the support, and the clamping plates are arranged in the strip opening. When the bidirectional screw rotates, the two clamping plates simultaneously move toward the fixed pipe section until they clamp the outer wall of the fixed pipe section. The bidirectional screw is driven by a motor with a reducer.

[0006] The centering mechanism includes a stud, one end of which is fixedly provided with a fixed disk, and the other end is sleeved with a movable disk, at least three connecting rods 1 are evenly distributed circumferentially on the side wall of the fixed disk, one end of the connecting rod 1 is hinged on the fixed disk, and the other end is hinged with a connecting rod 2, the connecting rod 2 is hinged on the movable disk, and a support block is provided on the hinge shaft connecting the connecting rod 1 and the connecting rod 2, and the support block is located on the outside of the connecting rod 2 and the connecting rod 1;

[0007] It also includes a sleeve that is arranged on the stud through a threaded connection, the sleeve is rotatably arranged on the movable disk through a bearing, and the bearing seat is fixed on the movable disk.

[0008] The number of the connecting rods 1 is preferably four.

[0009] The sleeve is rotated, and the sleeve moves on the stud, and pushes the movable disk to move along the axis of the stud. When all the support blocks are in contact with the inner wall of the elbow, it is basically determined that the axes of the stud and the elbow coincide.

[0010] The connecting member comprises a support rod arranged outside any of the clamping plates, and an inner sleeve rod perpendicular to the support rod is arranged on the side of the outer end of the support rod facing the elbow;

[0011] The connecting member also includes an inner sleeve rod 2 fixed on the stud and an outer sleeve rod capable of being sleeved on the inner sleeve rod 1 and the inner sleeve rod 2, wherein the inner sleeve rod 2 is perpendicular to the stud;

[0012] The center lines of the support rod, the inner rod 1, the outer rod and the inner rod 2 are in the same plane and can be in the same plane as the diameter of the fixed pipe section, and the cross-sectional shapes of the support rod, the inner rod 1, the outer rod and the inner rod 2 are all rectangular. When the center lines of the support rod, the inner rod 1, the outer rod and the inner rod 2 are in the same plane and in the same plane as the diameter of the fixed pipe section, it can be ensured that the elbow, the connector and the pipe section to be connected are in the same plane, and the position of the elbow is guaranteed.

[0013] The clamping plate comprises a sector-shaped ring plate which can be concentric with the fixed pipe section and a rectangular plate arranged in the strip-shaped opening, the sector-shaped ring plate is provided with an arc-shaped slideway which is concentric with the sector-shaped ring plate, a slider is slidably arranged in the arc-shaped slideway, the support rod is fixed on the slider, a mounting plate is arranged on the outer side of the clamping plate and on both sides of the sector-shaped ring plate, a top screw is arranged on the mounting plate through a threaded connection, and the top screw can be pressed against the support rod;

[0014] When the two top screws are both pressed against the support rod, the center of the support rod and the diameter of the fixed pipe section are in the same plane;

[0015] When the two top screws are not in contact with the support rod, the sliding block can move along the arc-shaped slideway.

[0016] Since the groove elbow and the fixed pipe section are connected by a clamp, a sealing ring needs to be provided at the connection between the groove elbow and the fixed pipe section. Generally, the sealing ring is installed on the elbow, and then after the elbow and the fixed pipe section are connected, the outer end of the sealing ring on the elbow is moved into the groove on the fixed pipe section. This is generally done manually. Since the sealing ring is tightly attached to the outer wall of the elbow, it is difficult to move, which is time-consuming and laborious.

[0017] In order to solve this problem, the present application provides the arc-shaped slideway so that the slider can realize a small angle rotation on the arc-shaped slideway, so that when a person pulls the sealing ring, the sealing ring can be conveniently moved to the fixed pipe section, thereby facilitating the installation of the sealing ring.

[0018] It also includes a driving mechanism for driving the slider to swing along the arc-shaped slideway, wherein the driving mechanism includes fan-shaped bevel racks symmetrically and fixedly arranged at two ends of the outer side of the slider, and the fan-shaped bevel racks are concentric with the arc-shaped slideway;

[0019] It also includes a partial bevel gear that can mesh with the two fan-shaped bevel racks, and the partial bevel gear cannot mesh with the two fan-shaped bevel racks at the same time. The two mounting plates are connected by a fixed plate, and the fixed plate is located on the outside of the fan-shaped bevel racks. The partial bevel gear is rotatably set on the fixed plate, and the partial bevel gear is driven by a motor, and the motor is set on the fixed plate. The partial bevel gear rotates, and the teeth on the partial bevel gear mesh with the fan-shaped bevel racks respectively, so that the reciprocating movement of the slider can be realized. When the support block on the centering mechanism is close to the inner wall of the elbow, the elbow can reciprocate with the slider.

[0020] Two ends of the sector-shaped bevel gear rack are symmetrically arranged on two sides of the sliding block.

[0021] An adjusting screw is sleeved in the middle position of the support, and a V-shaped block with an opening facing the fixed pipe section is fixedly provided at the lower end of the adjusting screw. Nuts are provided on the adjusting screw and on both sides of the support through threaded connection, which simply realizes the positioning of the support and can also cooperate with the clamping mechanism to further improve the stability of the support.

[0022] The outer sleeve rod is provided with a push rod for limiting the movement of the inner sleeve rod 1 and the inner sleeve rod 2 through thread connection.

[0023] The support block is a cylinder, the axis of which is perpendicular to the axis of the elbow, so that the centering mechanism can be easily fixed in the elbow, and the elbow is not easily detached when it moves with the slider and the connector.

[0024] Working principle: Place the support on both sides of the fixed pipe section. According to the actual layout of the pipe section, the axis of the bidirectional screw needs to be kept parallel or vertical to the ground. Then rotate the bidirectional screw, and the two clamping plates move toward the fixed pipe section until they are clamped on the outer wall of the fixed pipe section.

[0025] Rotate the two top screws so that they are pressed against the support rods, keep the connector parallel to the bidirectional screw, align one end of the elbow with the fixed pipe section, insert the centering mechanism into the other end of the elbow, connect the inner sleeve rod 1 and the inner sleeve rod 2 through the outer sleeve rod, and then rotate the sleeve. The sleeve moves on the stud and pushes the movable disk to move along the axis of the stud. The outer ends of the connecting rod 1 and the connecting rod 2 move toward the inner wall of the elbow until all the support blocks are in contact with the inner wall of the elbow (when there are still support blocks that have not been in contact with the inner wall, the position of the stud can be fine-tuned, and then the sleeve is rotated until all the support blocks are in contact with the inner wall of the elbow). It is basically determined that the axis of the stud and the elbow coincide. At this time, the elbow and the fixed pipe section are on the same plane and parallel or perpendicular to the ground, so that the other end of the elbow does not tilt, which is convenient for installing another pipe section.

[0026] In order to facilitate the installation of the sealing ring, it is necessary to rotate the elbow. The two top screws can be loosened, and the motor that controls the local bevel gear can be started. The motor drives the local bevel gear to rotate. The local bevel gear rotates one circle and first engages with a fan-shaped bevel rack. The elbow can achieve a small angle of forward rotation on the arc slide driven by the slider, and then engages with another fan-shaped bevel rack. The elbow can achieve a small angle of reversal on the arc slide driven by the slider. The local bevel gear continues to rotate, and the elbow can achieve a small angle of forward and reverse rotation. In this way, when a person pulls the sealing ring, the sealing ring can be easily moved to the fixed pipe section, which facilitates the installation of the sealing ring.

[0027] After the sealing ring is installed, a top screw far from the sliding block is tightened, and when the support rod hits the top screw, the positioning of the elbow can be achieved.

[0028] Compared with the prior art, the beneficial effects of the present invention are: it is convenient to position the groove elbow when installing the groove elbow; it is convenient to keep the elbow parallel to the ground or wall after installation, and it is convenient to install the elbow and another pipe section; in order to facilitate the installation of the sealing ring, the connecting piece can realize a small angle reciprocating rotation under the cooperation of the local bevel gear and the fan-shaped bevel rack, so that a movement gap is generated between the sealing ring and the elbow, which is convenient for moving the sealing ring to the fixed pipe section. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 Reference for the use status of the present invention Figure 1 ;

[0030] Figure 2 It is a schematic diagram of the overall structure of the present invention;

[0031] Figure 3 It is a structural schematic diagram of the clamping mechanism and its related parts;

[0032] Figure 4 for Figure 3 A partial enlarged view of the middle A;

[0033] Figure 5 It is a structural schematic diagram of the centering mechanism;

[0034] Figure 6 It is a schematic diagram of the local structure;

[0035] Figure 7 It is a schematic diagram of the structure of the clamping plate and its related parts;

[0036] Figure 8 Reference for the use status of the present invention Figure 2 ;

[0037] The reference numerals are: 1, clamping mechanism; 2, connecting piece; 3, centering mechanism; 4, fixed pipe section; 5, elbow; 6, slider; 7, driving mechanism; 8, mounting plate; 9, adjusting screw; 10, clamp; 101, clamping plate; 102, bidirectional screw; 103, clamping block; 104, strip opening; 105, external plate; 106, motor 1; 10101, rectangular plate; 10102, fan-shaped ring plate; 10103, arc slide; 201, support rod; 202 , inner sleeve rod one; 203, outer sleeve rod; 204, inner sleeve rod two; 205, push rod; 301, stud; 302, fixed plate; 303, connecting rod one; 304, connecting rod two; 305, movable plate; 306, sleeve; 307, bearing seat; 308, bearing; 309, support block; 310, hinge shaft; 701, fan-shaped bevel rack; 702, partial bevel gear; 703, motor two; 704, fixed plate; 801, push screw; 901, V-block; 902, nut. DETAILED DESCRIPTION

[0038] In order to clearly illustrate the technical features of this solution, this solution is described below through a specific implementation method.

[0039] See also Figure 1-Figure 8A groove elbow connection locator includes a clamping mechanism 1 clamped on the outer wall of a fixed pipe section 4 and a centering mechanism 3 that can be arranged inside the elbow 5. The centering mechanism 3 and the clamping mechanism 1 are connected by a connecting piece 2. The clamping mechanism 1 includes two clamping plates 101 symmetrically arranged on the outside of the pipe section. Two clamping blocks 103 are symmetrically arranged on the opposite surfaces of the two clamping plates 101. The symmetry lines of the two clamping blocks 103 on the same clamping plate 101, the diameter of the fixed pipe section 4, the connecting piece 2 and the axis of the centering mechanism 3 can be on the same plane, and the plane can be perpendicular or parallel to the ground.

[0040] The clamping mechanism 1 includes a support and a bidirectional screw 102 rotatably arranged on the support, two clamping plates 101 are arranged at both ends of the bidirectional screw 102 through threaded connection, and a strip opening 104 is arranged on the support to limit the rotation of the clamping plate 101, and the clamping plate 101 is arranged in the strip opening 104. When the bidirectional screw 102 rotates, the two clamping plates 101 simultaneously move toward the fixed pipe section 4 until they clamp the outer wall of the fixed pipe section 4. The bidirectional screw 102 is driven by a motor 106 with a reducer.

[0041] The centering mechanism 3 includes a stud 301, one end of which is fixedly provided with a fixed disk 302, and the other end is sleeved with a movable disk 305, at least three connecting rods 1 303 are evenly distributed circumferentially on the side wall of the fixed disk 302, one end of the connecting rod 1 303 is hinged on the fixed disk 302, and the other end is hingedly provided with a connecting rod 2 304, the connecting rod 2 304 is hingedly provided on the movable disk 305, and a support block 309 is provided on the hinge shaft 310 connecting the connecting rod 1 303 and the connecting rod 2 304, and the support block 309 is located on the outside of the connecting rod 2 304 and the connecting rod 1 303;

[0042] It also includes a sleeve 306 that is threadedly connected to the stud 301 . The sleeve 306 is rotatably disposed on the movable disk 305 via a bearing 308 . A bearing seat 307 is fixed on the movable disk 305 .

[0043] The number of connecting rods 303 is preferably four.

[0044] The sleeve 306 is rotated, and the sleeve 306 moves on the stud 301, and pushes the movable plate 305 to move along the axis of the stud 301. When all the support blocks 309 are in contact with the inner wall of the elbow 5, it is basically determined that the axes of the stud 301 and the elbow 5 coincide.

[0045] The connecting member 2 includes a support rod 201 arranged outside any clamping plate 101, and an inner sleeve rod 202 perpendicular to the support rod 201 is arranged on the side of the outer end of the support rod 201 facing the elbow 5;

[0046] The connecting member 2 further comprises an inner sleeve rod 204 fixed on the stud 301 and an outer sleeve rod 203 which can be sleeved on the inner sleeve rod 1 202 and the inner sleeve rod 204 , and the inner sleeve rod 204 is perpendicular to the stud 301;

[0047] The center lines of the support rod 201, the inner rod 1 202, the outer rod 203 and the inner rod 2 204 are in the same plane and can be in the same plane with the diameter of the fixed pipe section 4. The cross-sectional shapes of the support rod 201, the inner rod 1 202, the outer rod 203 and the inner rod 2 204 are all rectangular. When the center lines of the support rod 201, the inner rod 1 202, the outer rod 203 and the inner rod 2 204 are in the same plane and in the same plane with the diameter of the fixed pipe section 4, it can be ensured that the elbow 5, the connector 2 and the pipe section to be connected are in the same plane, and the position of the elbow 5 is guaranteed.

[0048] The clamping plate 101 includes a fan-shaped ring plate 10102 that can be concentric with the fixed pipe section 4 and a rectangular plate 10101 arranged in the strip-shaped opening 104, the fan-shaped ring plate 10102 is provided with an arc-shaped slideway 10103 that is concentric with the fan-shaped ring plate 10102, a slider 6 is slidably arranged in the arc-shaped slideway 10103, the support rod 201 is fixed on the slider 6, and a mounting plate 8 is arranged on the outside of the clamping plate 101 and on both sides of the fan-shaped ring plate 10102, and a top screw 801 is arranged on the mounting plate 8 through a threaded connection, and the top screw 801 can be pressed against the support rod 201;

[0049] When the two top screws 801 are both pressed against the support rod 201, the center of the support rod 201 and the diameter of the fixed pipe section 4 are in the same plane;

[0050] When the two top screws 801 are not in contact with the support rod 201 , the slider 6 can move along the arc-shaped slideway 10103 .

[0051] Since the groove elbow 5 and the fixed pipe section 4 are connected by a clamp 10, a sealing ring needs to be provided at the connection between the groove elbow 5 and the fixed pipe section 4. Generally, the sealing ring is installed on the elbow 5, and then after the elbow 5 and the fixed pipe section 4 are connected, the outer end of the sealing ring on the elbow 5 is moved into the groove on the fixed pipe section 4. Generally, this operation is performed manually. Since the sealing ring is tightly attached to the outer wall of the elbow 5, it is difficult to move, which is time-consuming and laborious.

[0052] In order to solve this problem, the present application sets up an arc slide 10103, so that the slider 6 can realize a small angle rotation on the arc slide 10103, so that when a person pulls the sealing ring, the sealing ring can be easily moved to the fixed pipe section 4, which facilitates the installation of the sealing ring.

[0053] The driving of the slide block 6 can be manually driven, directly manually moving the slide block or directly moving the elbow, or electrically driven. But when the sealing ring is installed, the slide block needs to be reset to a position parallel to or vertical to the ground.

[0054] Embodiment 2:

[0055] Based on Example 1, see Figure 1-Figure 8 , further comprising a driving mechanism 7 for driving the slider 6 to swing along the arc-shaped slideway 10103, the driving mechanism 7 comprising fan-shaped bevel racks 701 symmetrically and fixedly arranged at both ends of the outer side of the slider 6, the fan-shaped bevel racks 701 being concentric with the arc-shaped slideway 10103;

[0056] It also includes a local bevel gear 702 that can mesh with two sector bevel racks 701, and the local bevel gear 702 cannot mesh with two sector bevel racks 701 at the same time. The two mounting plates 8 are connected by a fixed plate 704, and the fixed plate 704 is located outside the sector bevel rack 701. The local bevel gear 702 is rotatably arranged on the fixed plate 704, and the local bevel gear 702 is driven by a second motor 703, and the second motor 703 is arranged on the fixed plate 704. The local bevel gear 702 rotates, and the teeth on the local bevel gear 702 are respectively meshed with the sector bevel racks 701, so that the reciprocating movement of the slider 6 can be realized. When the support block 309 on the centering mechanism 3 is close to the inner wall of the elbow 5, the elbow 5 can reciprocate with the slider 6.

[0057] The two ends of the sector-shaped bevel rack 701 are symmetrically arranged on both sides of the slider 6 .

[0058] An adjusting screw 9 is sleeved in the middle position of the support, an external plate 105 is arranged on the support, the adjusting screw 9 is sleeved on the external plate 105, a V-shaped block 901 with an opening facing the fixed pipe section 4 is fixedly arranged at the lower end of the adjusting screw 9, nuts 902 are arranged on the adjusting screw 9 and on both sides of the support through threaded connection, which simply realizes the positioning of the support and can also cooperate with the clamping mechanism 1 to further improve the stability of the support.

[0059] The outer sleeve rod 203 is provided with a push rod 205 through a threaded connection to limit the movement of the inner sleeve rod 1 202 and the inner sleeve rod 204 .

[0060] The support block 309 is a cylinder, and the axis of the cylinder is perpendicular to the axis of the elbow 5 in space, which facilitates fixing the centering mechanism 3 in the elbow 5 and is not easy to disengage when the elbow 5 moves with the slider 6 and the connecting piece 2.

[0061] Working principle: Place the support on both sides of the fixed pipe section 4. According to the actual layout of the pipe section, the axis of the bidirectional screw 102 needs to be kept parallel or vertical to the ground. Then rotate the bidirectional screw 102, and the two clamping plates 101 move toward the fixed pipe section 4 until they are clamped on the outer wall of the fixed pipe section 4.

[0062] The two top screws 801 are rotated so that the two top screws 801 are pressed against the support rod 201, and the connecting piece 2 and the bidirectional screw 102 are kept in a parallel state. After one end of the elbow 5 is centered with the fixed pipe section 4, the centering mechanism 3 is inserted into the other end of the elbow 5, and the inner sleeve rod 1 202 and the inner sleeve rod 2 204 are connected through the outer sleeve rod 203. Then the sleeve 306 is rotated, and the sleeve 306 moves on the stud 301 and pushes the movable disk 305 to move along the axis of the stud 301. The outer ends of the connecting rod 1 303 and the connecting rod 2 304 move toward the inner wall of the elbow 5 until all the support blocks 309 are in contact with the inner wall of the elbow 5 (when there are still support blocks 309 that have not contacted the inner wall, the position of the stud 301 can be fine-tuned, and then the sleeve 306 is continued to be rotated until all the support blocks 309 are in contact with the inner wall of the elbow 5). It is basically determined that the axes of the stud 301 and the elbow 5 coincide. At this time, the elbow 5 and the fixed pipe section 4 are on the same plane and are parallel or perpendicular to the ground, so that the other end of the elbow 5 does not tilt, which facilitates the installation of another pipe section.

[0063] In order to facilitate the installation of the sealing ring, it is necessary to rotate the elbow 5. The two top screws 801 can be loosened, and the motor 2 703 that controls the local bevel gear 702 can be started. The motor 2 703 drives the local bevel gear 702 to rotate. The local bevel gear 702 rotates one circle and first meshes with a fan-shaped bevel rack 701. The elbow 5 can achieve a small angle of forward rotation on the arc slide 10103 driven by the slider 6, and then meshes with another fan-shaped bevel rack 701. The elbow 5 can achieve a small angle of reverse rotation on the arc slide 10103 driven by the slider 6. The local bevel gear 702 continues to rotate, and the elbow 5 can achieve a small angle of forward and reverse rotation. In this way, when a person pulls the sealing ring, the sealing ring can be easily moved to the fixed pipe section 4, which facilitates the installation of the sealing ring.

[0064] After installing the sealing ring, tighten a top screw 801 far from the slider 6. When the support rod 201 touches the top screw 801, the elbow 5 can be positioned. At this time, the connecting piece is parallel or vertical to the ground. After positioning, install the clamp 10 and tighten the bolts on the clamp 10 to fix it.

[0065] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0066] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0067] In the description of the invention, it should be noted that, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", and "set" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the invention can be understood according to specific circumstances.

[0068] Technical features not described in the present invention can be achieved through or by adopting existing technologies and will not be described in detail here. Of course, the above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Changes, modifications, additions or substitutions made by ordinary technicians in this technical field within the essential scope of the present invention should also fall within the scope of protection of the present invention.

Claims

1. A groove elbow connection locator, characterized in that: It includes a clamping mechanism clamped on the outer wall of the fixed pipe section and a centering mechanism that can be arranged inside the elbow, the centering mechanism and the clamping mechanism are connected by a connecting piece, the clamping mechanism includes two clamping plates symmetrically arranged on the outer side of the fixed pipe section, two clamping blocks are symmetrically arranged on the opposite surfaces of the two clamping plates, and the symmetry lines of the two clamping blocks on the same clamping plate, the diameter of the fixed pipe section, the connecting piece and the axis of the centering mechanism can be on the same plane, and the plane can be perpendicular or parallel to the ground; The clamping mechanism comprises a support and a bidirectional screw rotatably arranged on the support, two clamping plates are arranged at both ends of the bidirectional screw by threaded connection, a strip opening for limiting the rotation of the clamping plate is arranged on the support, and the clamping plate is arranged in the strip opening; The centering mechanism includes a stud, one end of which is fixedly provided with a fixed disk, and the other end is sleeved with a movable disk, at least three connecting rods 1 are evenly distributed circumferentially on the side wall of the fixed disk, one end of the connecting rod 1 is hinged on the fixed disk, and the other end is hinged with a connecting rod 2, the connecting rod 2 is hinged on the movable disk, and a support block is provided on the hinge shaft connecting the connecting rod 1 and the connecting rod 2, and the support block is located on the outside of the connecting rod 2 and the connecting rod 1; It also includes a sleeve that is threadedly connected to the stud, the sleeve is rotatably arranged on the movable disk through a bearing, and the bearing seat is fixed on the movable disk; The connecting member comprises a support rod arranged outside any of the clamping plates, and an inner sleeve rod perpendicular to the support rod is arranged on the side of the outer end of the support rod facing the elbow; The connecting member also includes an inner sleeve rod 2 fixed on the stud and an outer sleeve rod capable of being sleeved on the inner sleeve rod 1 and the inner sleeve rod 2, wherein the inner sleeve rod 2 is perpendicular to the stud; The center lines of the support rod, the first inner sleeve rod, the outer sleeve rod and the second inner sleeve rod are in the same plane and can be in the same plane as the diameter of the fixed pipe section, and the cross-sectional shapes of the support rod, the first inner sleeve rod, the outer sleeve rod and the second inner sleeve rod are all rectangular; The clamping plate comprises a sector-shaped ring plate which can be concentric with the fixed pipe section and a rectangular plate arranged in the strip-shaped opening, the sector-shaped ring plate is provided with an arc-shaped slideway which is concentric with the sector-shaped ring plate, a slider is slidably arranged in the arc-shaped slideway, the support rod is fixed on the slider, a mounting plate is arranged on the outer side of the clamping plate and on both sides of the sector-shaped ring plate, a top screw is arranged on the mounting plate through a threaded connection, and the top screw can be pressed against the support rod; When the two top screws are both pressed against the support rod, the center of the support rod and the diameter of the fixed pipe section are in the same plane; When the two top screws are not in contact with the support rod, the sliding block can move along the arc-shaped slideway.

2. The groove elbow connection positioner according to claim 1, characterized in that: It also includes a driving mechanism for driving the slider to swing along the arc-shaped slideway, wherein the driving mechanism includes fan-shaped bevel racks symmetrically and fixedly arranged at two ends of the outer side of the slider, and the fan-shaped bevel racks are concentric with the arc-shaped slideway; It also includes a partial bevel gear that can mesh with the two fan-shaped bevel racks, and the partial bevel gear cannot mesh with the two fan-shaped bevel racks at the same time. The two mounting plates are connected by a fixed plate, and the fixed plate is located on the outside of the fan-shaped bevel racks. The partial bevel gear is rotatably set on the fixed plate, and the partial bevel gear is driven by a motor, and the motor is set on the fixed plate.

3. The groove elbow connection positioner according to claim 2, characterized in that: Two ends of the sector-shaped bevel gear rack are symmetrically arranged on two sides of the sliding block.

4. The groove elbow connection positioner according to claim 1, characterized in that: An adjusting screw is sleeved in the middle of the support, a V-shaped block with an opening facing the fixed pipe section is fixedly arranged at the lower end of the adjusting screw, and nuts are arranged on the adjusting screw and on both sides of the support through threaded connection.

5. The groove elbow connection positioner according to claim 1, characterized in that: The outer sleeve rod is provided with a push rod for limiting the movement of the inner sleeve rod 1 and the inner sleeve rod 2 through thread connection.

6. The groove elbow connection positioner according to claim 1, characterized in that: The support block is a cylinder, and the axis of the cylinder is vertical to the axis of the elbow.

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