High-temperature pipeline flange hydraulic bolt hot tightening device

Abstract

The utility model provides high temperature pipeline flange hydraulic bolt heat tight device relates to heat tight device technical field, include: pipeline, the pipeline is equipped with two, two pipeline inboard one end all has the flange, and the flange on two pipelines is connected through six bolts and six nuts, and each nut all has one hydraulic tensioner of sleeve joint, and the most upper side one bolt is clamped with hydraulic wrench, install the seat body on left side one pipeline, and the seat body slides four guide rods, and the right side one end of four guide rods all is welded on the auxiliary seat, and the auxiliary seat sleeve is connected on left side one pipeline, and the auxiliary seat right end surface is contacted with six hydraulic tensioners, and the seat body is connected with the adjusting screw rod of screw thread, adjusting screw rod drives the auxiliary seat to move along the guide rod through the screw thread, can accurate resistance all hydraulic tensioner, effectively avoid its and the nut appear axial misalignment problem, ensure the even stress in the process of fastening, improved bolt fastening's precision and reliability significantly.

Description

Technical Field

[0001] This utility model relates to the field of hot tightening device technology, and in particular to a hot tightening device for hydraulic bolts of high-temperature pipeline flanges. Background Technology

[0002] The high-temperature pipeline flange hydraulic bolt thermal tightening device is a specialized piece of equipment used for precise and efficient thermal tightening of bolts in high-temperature pipeline flange connections. It primarily addresses the problem of bolt loosening due to temperature changes in pipeline flanges under high-temperature conditions, which could lead to media leakage. Through specific hydraulic drive and temperature control technology, it achieves reliable bolt tightening, ensuring the safe operation of the pipeline system.

[0003] The existing device cannot tighten the hydraulic tensioner during the heat tightening process. When the hydraulic tensioner is not axially aligned with the bolt and nut, it can easily lead to uneven stress on the bolt, local stress concentration and bolt damage. Utility Model Content

[0004] This utility model relates to a hot tightening device for hydraulic bolts on high-temperature pipeline flanges. It solves the problem that existing devices cannot tighten the hydraulic tensioner during the hot tightening process. When the hydraulic tensioner is not axially aligned with the bolt and nut, it can easily lead to uneven bolt stress, local stress concentration and bolt damage.

[0005] This utility model provides a high-temperature pipeline flange hydraulic bolt hot tightening device, specifically including: a pipeline; there are two pipelines, and a flange is welded to one end of the inner side of each pipeline. The flanges on the two pipelines are connected by six bolts and six nuts. A hydraulic tensioner is fitted on each nut, and a hydraulic wrench is clamped on the top bolt; a base is installed on the left pipeline, and four guide rods slide on the base. The right end of each of the four guide rods is welded to an auxiliary seat, which is fitted onto the left pipeline. The right end face of the auxiliary seat contacts the six hydraulic tensioners, and an adjusting screw is threaded onto the base. The right end of the adjusting screw rotates on the auxiliary seat.

[0006] Furthermore, the connection between the seat and the left-side pipe is a sliding connection, and a locking screw is threaded onto the seat. When the locking screw is tightened, the seat is positioned on the left-side pipe.

[0007] Furthermore, both the base and the auxiliary base are composed of two parts joined together, and both parts of the base and the auxiliary base are fixed by screws.

[0008] Furthermore, an adjustment groove is provided at the adjustment point of the adjustment screw, and the adjustment groove has a hexagonal groove structure.

[0009] Furthermore, the seat, guide rod, auxiliary seat, locking screw, adjusting screw, and adjusting groove together form an auxiliary assembly; a sealing cover is fitted onto a pipe on the right side, the sealing cover is composed of two parts spliced ​​together, and an air inlet pipe and an exhaust pipe are connected to the sealing cover.

[0010] Furthermore, two handles are welded onto the sealing cover.

[0011] Furthermore, an auxiliary block is welded to the inner side of the sealing cover, and the inner side of the auxiliary block contacts the outer wall of the pipe.

[0012] This utility model provides a high-temperature pipeline flange hydraulic bolt thermal tightening device, which has the following beneficial effects: This device significantly improves fastening quality by incorporating an auxiliary assembly consisting of a base, guide rod, auxiliary seat, locking screw, adjusting screw, and adjusting groove. The base and pipe are slidably connected and fitted with the locking screw, allowing for flexible position adjustment and stable positioning. The modular design of the base and auxiliary seat greatly simplifies installation and disassembly on the pipe. The adjusting screw drives the auxiliary seat along the guide rod via a thread, precisely engaging all hydraulic tensioners and effectively preventing axial misalignment with the nut, ensuring uniform force distribution during fastening and significantly improving bolt tightening accuracy and reliability. The hexagonal adjusting groove on the adjusting screw supports both conventional and hexagonal wrench operation, enhancing the device's adaptability to different working conditions. This device achieves efficient heating of flanges, bolts, and nuts by using a two-part sealing cover, along with an inlet and outlet pipe. The auxiliary block inside the sealing cover makes close contact with the outer wall of the pipe, significantly reducing the chance of air leakage at the contact point and allowing the hot gas to be more concentrated on the heating part, improving heating efficiency and temperature uniformity. The handle design on the sealing cover makes disassembly after heating more convenient and labor-saving, shortening the process changeover time. In addition, the internal air pressure of the sealing cover can be adjusted through the outlet pipe during the heating process, ensuring the safety and stability of the heating process. Attached Figure Description

[0013] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings of the embodiments will be briefly described below.

[0014] The accompanying drawings described below are only related to some embodiments of the present invention and are not intended to limit the scope of the present invention.

[0015] In the attached diagram: Figure 1 A perspective view of the high-temperature pipeline flange hydraulic bolt thermal tightening device of this utility model is shown; Figure 2 This utility model is shown Figure 1 Enlarged view of point A; Figure 3 The front view of the high-temperature pipeline flange hydraulic bolt hot tightening device of this utility model is shown; Figure 4 This invention presents a three-dimensional view of the disassembled high-temperature pipeline flange hydraulic bolt hot tightening device. Figure 5 A perspective view of the sealing cover, handle, and auxiliary block of this utility model is shown; Figure 6 A perspective view of the sealing cover, handle, and auxiliary block of this utility model after disassembly is shown.

[0016] List of reference numerals 1. Pipe; 101. Flange; 102. Bolt; 103. Nut; 2. Hydraulic tensioner; 3. Hydraulic wrench; 4. Auxiliary components; 401. Base; 402. Guide rod; 403. Auxiliary seat; 404. Locking screw; 405. Adjusting screw; 406. Adjusting groove; 501. Sealing cover; 502. Handle; 503. Auxiliary block. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the described embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0018] Example 1: Please refer to Figures 1 to 6 : This utility model proposes a high-temperature pipeline flange hydraulic bolt hot tightening device, comprising: a pipeline 1; there are two pipelines 1, and a flange 101 is welded to one end of the inner side of each pipeline 1. The flanges 101 on the two pipelines 1 are connected by six bolts 102 and six nuts 103. A hydraulic tensioner 2 is fitted on each nut 103, and a hydraulic wrench 3 is clamped on the uppermost bolt 102; a base 401 is installed on the left pipeline 1, and four guide rods 402 slide on the base 401. The right end of each of the four guide rods 402 is welded with The auxiliary seat 403 is sleeved on a pipe 1 on the left side. The right end face of the auxiliary seat 403 contacts six hydraulic tensioners 2. The seat body 401 is threaded with an adjusting screw 405. The right end of the adjusting screw 405 rotates on the auxiliary seat 403. When tightening, the adjusting screw 405 is rotated. Under the thread drive of the adjusting screw 405, the auxiliary seat 403 moves to the right to complete the tightening of the six hydraulic tensioners 2. By pressing against the hydraulic tensioners 2, the axial misalignment between the hydraulic tensioners 2 and the nut 103 can be avoided, thus ensuring the tightening quality.

[0019] The connection between the seat 401 and the left pipe 1 is a sliding connection. The seat 401 is threaded with a locking screw 404. When the locking screw 404 is tightened, the seat 401 is positioned on the left pipe 1.

[0020] The base 401 and the auxiliary base 403 are both composed of two parts spliced ​​together. Both parts of the base 401 and the auxiliary base 403 are fixed by screws, which facilitates the installation and disassembly of the base 401 and the auxiliary base 403 on the pipe 1.

[0021] The adjusting screw 405 has an adjusting groove 406 at its adjusting point. The adjusting groove 406 is a hexagonal groove structure. When turning the adjusting screw 405, a regular wrench can be used for adjustment, or a hex wrench can be inserted into the adjusting groove 406 for adjustment. The adjustment is convenient and highly adaptable.

[0022] The auxiliary component 4 is composed of a seat 401, a guide rod 402, an auxiliary seat 403, a locking screw 404, an adjusting screw 405, and an adjusting groove 406. A sealing cover 501 is fitted onto a pipe 1 on the right side. The sealing cover 501 is composed of two parts. An air inlet pipe and an exhaust pipe are connected to the sealing cover 501. When heating the flange 101, bolt 102, and nut 103, the sealing cover 501 is placed over the flange 101, bolt 102, and nut 103. High-temperature gas is transported to the sealing cover 501 through the conveying pipe. At this time, the high-temperature gas can heat the flange 101, bolt 102, and nut 103.

[0023] Among them, an auxiliary block 503 is welded to the inner side of the sealing cover 501. The inner side of the auxiliary block 503 contacts the outer wall of the pipe 1. During use, the contact between the inner side of the auxiliary block 503 and the outer wall of the pipe 1 can reduce the probability of air leakage at the contact point between the sealing cover 501 and the pipe 1, and improve the heating efficiency of the flange 101, bolt 102 and nut 103.

[0024] Example 2, based on Example 1, such as Figures 1 to 6 As shown, two handles 502 are welded on the sealing cover 501. When disassembling the sealing cover 501, the handles 502 can be held to disassemble it, making disassembly convenient.

[0025] The working principle of this embodiment is as follows: In use, the sealing cover 501 is spliced ​​in two parts and placed over the outside of the flange 101, bolt 102, and nut 103. The auxiliary block 503 is used to enhance the sealing by contacting the outer wall of the pipe 1. High-heat gas is delivered through the air inlet pipe and heats the flange 101, bolt 102, and nut 103 through the sealing cover 501. During the heating process, the internal air pressure can be adjusted through the exhaust pipe. After heating is completed, the sealing cover 501 is removed by holding the handle 502 and then tightened. The seat 401 is spliced ​​in two parts and installed on the left pipe 1. The locking screw 404 is tightened to position the seat 401. Then, the auxiliary seat 403 is spliced ​​in the same way and fitted onto the left pipe 1, ensuring that it is in contact with the seat 401. 01. Connected by four guide rods 402; next, attach the six hydraulic tensioners 2 to the corresponding nuts 103 respectively, rotate the adjusting screw 405, and use a conventional wrench or a hex wrench inserted into the adjusting slot 406 to move the auxiliary seat 403 to the right and press against the six hydraulic tensioners 2 to prevent them from being misaligned with the nuts 103 axially; use the hydraulic wrench 3 that is engaged with the uppermost bolt 102 to tighten the bolts, and tighten the six bolts 102 in sequence; after tightening, rotate the adjusting screw 405 in the opposite direction to reset the auxiliary seat 403, loosen the locking screw 404 to remove the seat 401 and the auxiliary seat 403, and finally remove the hydraulic tensioners 2 and the hydraulic wrench 3 to complete the entire operation process.

Claims

1. A high-temperature pipeline flange hydraulic bolt hot tightening device, characterized in that, include: Pipeline (1); There are two pipes (1). One end of each pipe (1) is welded with a flange (101). The flanges (101) on the two pipes (1) are connected by six bolts (102) and six nuts (103). Each nut (103) is fitted with a hydraulic tensioner (2). The uppermost bolt (102) is fitted with a hydraulic wrench (3). A seat (401) is installed on the left pipe (1). Four guide rods (402) slide on the seat (401). The right end of each of the four guide rods (402) is welded to an auxiliary seat (403). The auxiliary seat (403) is fitted on the left pipe (1). The right end of the auxiliary seat (403) is in contact with the six hydraulic tensioners (2). An adjusting screw (405) is threaded onto the seat (401). The right end of the adjusting screw (405) rotates on the auxiliary seat (403).

2. The high-temperature pipeline flange hydraulic bolt hot tightening device according to claim 1, characterized in that, The connection between the seat (401) and the left pipe (1) is a sliding connection. The seat (401) is threaded with a locking screw (404). When the locking screw (404) is tightened, the seat (401) is positioned on the left pipe (1).

3. The high-temperature pipeline flange hydraulic bolt hot tightening device according to claim 1, characterized in that, The base (401) and the auxiliary base (403) are both composed of two parts spliced ​​together, and both parts of the base (401) and the auxiliary base (403) are fixed by screws.

4. The high-temperature pipeline flange hydraulic bolt hot tightening device according to claim 1, characterized in that, The adjusting screw (405) has an adjusting groove (406) at its adjusting position. The adjusting groove (406) is a hexagonal groove structure.

5. The high-temperature pipeline flange hydraulic bolt hot tightening device according to claim 1, characterized in that, The base (401), guide rod (402), auxiliary base (403), locking screw (404), adjusting screw (405) and adjusting groove (406) together form the auxiliary component (4); a sealing cover (501) is fitted on a pipe (1) on the right side. The sealing cover (501) is composed of two parts spliced ​​together. An air inlet pipe and an exhaust pipe are connected to the sealing cover (501).

6. The high-temperature pipeline flange hydraulic bolt hot tightening device according to claim 5, characterized in that, Two handles (502) are welded onto the sealing cover (501).

7. The high-temperature pipeline flange hydraulic bolt hot tightening device according to claim 6, characterized in that, An auxiliary block (503) is welded to the inside of the sealing cover (501), and the inside of the auxiliary block (503) is in contact with the outer wall of the pipe (1).

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