Coaxial positioning tool for sealing and butting flanges

Abstract

The coaxial positioning tool comprises an insertion rod, a clamping assembly and a telescopic assembly, the clamping assembly comprises two clamping plates which are in butt joint up and down and connected through bolts, each clamping plate is provided with double counterbores, an unthreaded hole and a threaded hole, the unthreaded hole is used for being movably matched with the insertion rod, and the threaded hole is used for being movably matched with the insertion rod. The telescopic assembly comprises an outer sleeve rod and an inner pull rod, a pull plate and a measuring plate which are symmetrically distributed are arranged on the side face of the outer sleeve rod, and length scales are arranged on the measuring plate. The insertion rod provided by the utility model is inserted into a pair of flange holes of the two flanges and is used for basic positioning; the clamping assembly, the telescopic assembly and the insertion rod are assembled, after bolts at other hole positions are installed, the insertion rod can be finely adjusted in a lever mode by manually pulling and rotating the handle rod, and the flange positioning precision can be improved; the measuring plates on the outer sleeve rod are compared up and down to measure the flange butt joint gap, and the flange butt joint quality is further improved.

Description

Technical Field

[0001] This utility model belongs to the field of flange sealing and docking equipment, and in particular relates to a coaxial positioning tooling for flange sealing and docking. Background Technology

[0002] A flange is a mechanical connection structure, mostly used for pipe connections, and the quality of the flange seal directly affects the sealing of the pipe. During the mating process of two flanges, bolts can be inserted first into the flange hole at the bottom, followed by bolts inserted at different angles from the flange holes at different positions. Before the last bolt is assembled, a lever can be inserted into the hole to make final adjustments to the flange angle and the position of the sealing gasket.

[0003] Existing patent CN214331681U discloses a large-diameter pipe flange docking device for adjusting the height of two pipes, a first pipe and a second pipe, with a height difference. The device includes a lifting assembly connected to the first flange and a lifting power assembly connected to the second flange. Based on the same horizontal plane, the height of the first pipe is lower than that of the second pipe. The lifting power assembly is connected to the lifting assembly and can drive the lifting assembly upwards, thereby raising the first pipe. This large-diameter pipe flange docking device can dock and install pipes, improving the efficiency of large-diameter pipe flange docking. However, this device has drawbacks: it is inconvenient to insert bolts into both flanges, and it may even occupy the mounting surface of the sealing gasket, especially when there are many flange holes. Its practicality needs improvement, and additional measuring devices are required to measure multiple locations. Utility Model Content

[0004] This utility model addresses the technical problems existing in the aforementioned flange sealing and docking devices by proposing a coaxial positioning fixture for flange sealing and docking that is reasonably designed, simple in structure, highly portable, has leverage and measurement capabilities, and is highly practical.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: The coaxial positioning fixture for flange sealing and docking provided by this utility model includes an insertion rod and a pair of clamping assemblies. The clamping assembly includes two clamping plates that are joined together vertically. A double countersunk hole is provided in the middle of the mating surface of the clamping plate. The clamping plate is provided with smooth holes and threaded holes symmetrically distributed around the double countersunk hole. The smooth holes are used to movably engage with the insertion rod. A handle is provided in the threaded hole and threaded hole. Two connecting holes are provided between the double countersunk hole, the smooth hole, and the threaded hole. Bolts for connecting the two clamping plates are provided in the connecting holes. A telescopic assembly is provided between the two clamping assemblies. The telescopic assembly includes an outer rod and an inner pull rod. The end of the outer rod is connected to the double countersunk hole. A pair of first nuts are provided at the end of the outer rod and threadedly connected thereto. A pull plate and a measuring plate are symmetrically distributed on the side of the outer rod. The measuring plate is provided with length graduations. The end of the inner pull rod is connected to the double countersunk hole. A pair of second nuts are provided at the end of the inner pull rod and threadedly connected thereto.

[0006] Preferably, the outer sleeve is provided with an end cap, which is nested with the inner pull rod, and the inner sleeve is provided with a telescopic spring that is connected to the end of the inner pull rod.

[0007] Preferably, the clamping plate is provided with a positioning screw that communicates with the threaded hole.

[0008] Preferably, the clamping plate has a central column in the middle, and the central column has an internal hexagonal groove.

[0009] Preferably, the measuring plate has length scales on both the top and bottom surfaces.

[0010] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0011] 1. The coaxial positioning fixture for flange sealing and mating provided by this utility model inserts a rod into a pair of flange holes of two flanges for basic positioning. The clamping assembly, telescopic assembly, and rod are assembled. After the bolts in other holes are installed, the rod can be finely adjusted by manually turning the lever, which helps improve the accuracy of flange positioning. The measuring plate on the outer rod is compared with the flange mating gap, serving as a reference for tightening the bolts and further improving the quality of flange mating. This device is reasonably designed, highly portable, has lever and measuring capabilities, and is very practical, making it suitable for large-scale promotion. Attached Figure Description

[0012] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 An isometric view of the coaxial positioning fixture for flange sealing connection provided in the embodiment;

[0014] Figure 2 A cross-sectional view of the coaxial positioning fixture for flange sealing connection provided in the embodiment;

[0015] Figure 3 A top view of the coaxial positioning fixture for flange sealing connection provided in the embodiment;

[0016] Figure 4 A working drawing of the coaxial positioning tooling for flange sealing connection provided in the embodiment;

[0017] In the above figures, 1. Insert rod; 2. Clamping assembly; 21. Clamping plate; 22. Double countersunk hole; 23. Plain hole; 24. Threaded hole; 25. Bolt; 26. Positioning screw; 27. Center post; 28. Socket hexagonal groove; 3. Handle rod; 4. Telescopic assembly; 41. Outer rod; 42. Inner pull rod; 43. First nut; 44. Pull plate; 45. Measuring plate; 46. Length scale; 47. Second nut; 48. End cap; 49. Telescopic spring. Detailed Implementation

[0018] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below in conjunction with the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other. For ease of description, the terms "upper," "lower," "left," and "right" appearing below only indicate that they correspond to the upper, lower, left, and right directions in the accompanying drawings and do not limit the structure.

[0019] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0020] Examples, such as Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, the coaxial positioning fixture for flange sealing and mating provided by this utility model includes a rod 1 and a pair of clamping assemblies 2. The clamping assembly 2 includes two clamping plates 21 that are mated vertically. A double countersunk hole 22 is provided in the middle of the mating surface of the clamping plate 21. The clamping plate 21 is provided with smooth holes 23 and threaded holes 24 symmetrically distributed with respect to the double countersunk hole 22. The smooth holes 23 are used to movably engage with the rod 1. A handle 3 is provided in the threaded hole 24 and threadedly connected to it. Two connecting holes are provided between the double countersunk hole 22 and the smooth holes 23 and threaded holes 24. A connecting rod 3 is provided in the connecting hole. Bolts 25 connect the two clamping plates 21. A telescopic assembly 4 is provided between the two clamping assemblies 2. The telescopic assembly 4 includes an outer rod 41 and an inner pull rod 42. The end of the outer rod 41 is connected to the double countersunk hole 22. A pair of first nuts 43 are provided at the end of the outer rod 41 and are threadedly connected thereto. A symmetrically distributed pull plate 44 and measuring plate 45 are provided on the side of the outer rod 41. A length scale 46 is provided on the measuring plate 45. The end of the inner pull rod 42 is connected to the double countersunk hole 22. A pair of second nuts 47 are provided at the end of the inner pull rod 42 and are threadedly connected thereto.

[0021] Specifically, the flange body can be moved using a clamp lifter, which does not affect the installation of the bolts 25 and sealing gaskets in the flange holes. Before the two flanges are closely joined, the insert rod 1 is inserted into a pair of flange holes of the two flanges for basic positioning; the two flanges are gradually brought closer, and then the clamp plate 21 assembly is inserted into the insert rod 1, and the telescopic assembly 4 is installed between the clamp plate 21 assemblies, so that the clamp plate 21 assembly has a certain spacing span on the insert rod 1; the bolts 25 in other holes are assembled first, but not tightened; then, by manually turning the lever 3, the insert rod 1 can be finely adjusted in a lever manner to improve the coaxial accuracy of the flange positioning; by flipping the telescopic assembly 4 up and down, the measuring plate 45 on the outer rod 41 can be compared with the flange docking gap from multiple positions, which can be used as a reference for tightening the bolts 25. Then, the other bolts 25 are tightened in sequence, and finally the insert rod 1 is pulled out and the last bolt 25 is installed, thereby improving the flange docking quality. This device is reasonably designed, highly portable, and has lever and measurement capabilities, making it very practical.

[0022] To facilitate the assembly of the telescopic component 4 and the clamping plate 21, in addition to the design of using nuts and double countersunk holes 22, this utility model provides an end cap 48 on the outer sleeve rod 41. The end cap 48 is nested with the inner pull rod 42, and a telescopic spring 49 connected to the end of the inner pull rod 42 is provided inside the outer sleeve rod 41. The end cap 48 and the outer sleeve rod 41 can be connected by threads or screws, while the inner pull rod 42 and the outer sleeve rod 41 remain coaxial. Under the connection of the telescopic spring 49, the telescopic component 4 can have a certain telescopic capacity, and the clamping plate 21 can have a certain clamping span in its natural state, preventing it from freely detaching from the insert rod 1.

[0023] In order to improve the reliability of the connection between the handlebar 3 and the clamp plate 21, the present invention provides a positioning screw 26 on the clamp plate 21 that communicates with the threaded hole 24. On the basis of the threaded connection between the handlebar 3 and the threaded hole 24, the positioning screw 26 is used to position the handlebar 3 radially.

[0024] To improve the utilization rate of this device, a central column 27 is provided in the middle of the clamping plate 21, and the central column 27 is provided with an internal hexagonal groove 28. By inserting a longer hexagonal wrench into the internal hexagonal groove 28, the lever arm can be extended, which is suitable for situations where fine-tuning torque is required.

[0025] Furthermore, the present invention provides length scales 46 on both the upper and lower surfaces of the measuring plate 45, thereby allowing the clamping plate 21 assembly and the telescopic assembly 4 to rotate up and down around the center of the insertion rod 1. The length scales 46 on both sides can be used to measure the flange gap at multiple points.

[0026] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A coaxial positioning fixture for flange sealing and mating, characterized in that, The device includes a insertion rod and a pair of clamping assemblies. Each clamping assembly comprises two mating plates, with a double countersunk hole in the center of the mating surface. The plates also have symmetrically distributed open holes and threaded holes around the countersunk holes. The open holes are used to movably engage with the insertion rod. A handle is threaded into the threaded hole. Two connecting holes are provided between the countersunk holes, the open holes, and the threaded holes, and bolts are installed in these connecting holes to connect the two clamping plates. A telescopic assembly is provided between the two clamping assemblies. The telescopic assembly includes an outer rod and an inner pull rod. The end of the outer rod connects to the double countersunk holes and has a pair of threaded first nuts. Symmetrically distributed pull plates and measuring plates are provided on the sides of the outer rod, with length graduations on the measuring plates. The end of the inner pull rod connects to the double countersunk holes and has a pair of threaded second nuts.

2. The coaxial positioning fixture for flange sealing and mating according to claim 1, characterized in that, The outer sleeve rod is provided with an end cap, which is nested with the inner pull rod. The inner sleeve rod is provided with a telescopic spring that is connected to the end of the inner pull rod.

3. The coaxial positioning fixture for flange sealing and mating according to claim 2, characterized in that, The clamp plate is provided with positioning screws that communicate with threaded holes.

4. The coaxial positioning fixture for flange sealing and mating according to claim 3, characterized in that, The clamping plate has a central column in the middle, and the central column has an internal hexagonal groove.

5. The coaxial positioning fixture for flange sealing and mating according to claim 4, characterized in that, The measuring plate has length scales on both its top and bottom surfaces.

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