Novel tool for vertically installing O-shaped ring

Abstract

The novel tool for vertically installing the O-shaped ring comprises the O-shaped ring installed on a connecting face in an embedded mode, the edge of the connecting face extends outwards to form a circle of sealing face, and a circle of installing through holes are evenly formed in the sealing face. Mounting through holes are formed in the sealing surface, a circle of sealing groove parallel to the sealing surface is further formed in the position, located on the sealing surface, of the inner sides of the mounting through holes, an O-shaped ring matched with the sealing groove is embedded and mounted in the sealing groove, a limiting device is arranged on the outer side of the O-shaped ring and used for temporarily limiting the O-shaped ring, and mounting bolt adjusting nuts are inserted into part of the mounting through holes. And the limiting device is taken out to complete the installation of the remaining bolts while the connection surfaces between the air cavity and the tube plate and between the tube plate and the end plate are fixed, so that the O-shaped ring is prevented from shifting due to inclination, vibration and pressure factors in the installation process, and the accuracy after installation is ensured. The utility model has the advantages of simple and reasonable structure, practicability, convenience and the like.

Description

TECHNICAL FIELD

[0001] The utility model belongs to heat exchanger sealing element installation frock technical field relates to a new frock of O type ring vertical installation. BACKGROUND

[0002] Heat exchanger is a kind of pressure vessel widely used in air separation equipment, petroleum chemical industry for heat exchange, and the sealing performance of equipment is very important. O-ring is the most common sealing mechanical design because of its low price, simple manufacturing, reliable function and simple installation requirement. The sealing between the gas cavity and the tube plate, the tube plate and the end plate of the heat exchanger of general unit is static sealing using O-ring. The sealing of O-ring is realized by its installation in sealing groove, elastic contact force generated by elastic deformation under the action of medium pressure in pre-compression and working. The sealing capacity generally increases with the increase of pressure. But when O-ring is pre-installed, it is in the middle of sealing groove, not subject to any pressure and the limiting of sealing groove, especially when the heat exchanger is placed horizontally, O-ring is installed vertically, slight vibration or inclination will make it fall from the sealing groove, which makes the work load large, O-ring is easy to damage, time-consuming and labor-consuming, and O-ring is not easy to be found slightly damaged, but will reduce its service life and affect the stable operation of product.

[0003] Moreover, the frock for O-ring vertical installation is not perfect at home and abroad at present, most enterprises adopt the way of sealing groove with O-ring line diameter greater than or equal to the installation without frock, but it violates the use standard of O-ring. Even if the O-ring with standard line diameter is installed, it will also be changed in product direction or fixed by glue dispensing. But it often makes the installation workload large, increases the difficulty and cost of work, and causes damage to sealing surface not easy to be found in the process, and the installation process also causes O-ring to loosen due to insufficient pre-tightening force, which causes O-ring edge to be damaged and twisted, deformed, and unqualified in sealing test, and if not found in time, it will also bury hidden troubles for long-term stable operation of equipment.

[0004] Therefore, a new frock for O-ring vertical installation is designed to overcome the above problems. CONTENT OF UTILITY MODEL

[0005] The utility model aims at overcoming the deficiencies in the prior art, and provides a new frock for O-ring vertical installation with simple and reasonable structure and practical convenience.

[0006] This utility model is achieved through the following technical solution: a novel tooling for vertical O-ring installation, comprising an O-ring embedded in the connecting surface between the heat exchanger gas chamber and the tube sheet, and between the tube sheet and the end plate. The edge of the connecting surface extends outward to form a sealing surface. A ring of mounting through holes is evenly formed on the sealing surface, and a sealing groove parallel to the sealing surface is formed on the inner side of the mounting through holes on the sealing surface. A matching O-ring is embedded and installed in the sealing groove. A limiting device is provided on the outer side of the O-ring for temporary limiting of the O-ring. An adjusting nut is inserted into part of the mounting through hole to fix the connecting surface between the gas chamber and the tube sheet, and between the tube sheet and the end plate. At the same time, the limiting device is removed to complete the installation of the remaining bolts, thereby ensuring that the O-ring will not shift due to tilting, vibration, or pressure during the installation process, ensuring the accuracy of the installation.

[0007] Preferably, the limiting device consists of a long strip-shaped fixing rod, a long-headed bolt, and an adjusting nut. A long-headed bolt is inserted into the mounting through hole on the sealing surface. After passing through the mounting through hole, both ends of the long-headed bolt protrude from the mounting through hole, forming a working part and an assembly part, respectively. An adjusting nut is fitted on the outside of the assembly part. The side of the working part has a horizontal through hole for placing the long-headed bolt. The long strip-shaped fixing rod is horizontally inserted into the through hole, making the long strip-shaped fixing rod perpendicular to the long-headed bolt. The position of the long-headed bolt is adjusted by adjusting the adjusting nut, so that the long strip-shaped fixing rod is close to and abuts against the O-ring, temporarily limiting and fixing the O-ring.

[0008] Preferably, one end of the elongated fixing rod is provided with a limiting block with a diameter larger than that of the elongated fixing rod, in order to prevent the elongated fixing rod from falling out of the through hole for placing the long-headed bolt during use.

[0009] Preferably, the diameter of the working part of the long-headed bolt is smaller than the diameter of the assembly part, which facilitates the overall insertion of the long-headed bolt into the mounting through hole and makes it easier to distinguish, thereby improving the overall installation efficiency.

[0010] Preferably, the number of the elongated fixing rod, the long-headed bolt and the adjusting nut is eight sets, and they are evenly distributed in eight positions of the O-ring to ensure temporary limiting and fixing of the O-ring.

[0011] Preferably, the surface of the elongated fixing rod is smooth and the head is semi-circular, which facilitates removal and avoids damage to the O-ring from sharp points.

[0012] The beneficial effects of this utility model are as follows:

[0013] The novel tooling for vertical O-ring installation designed in this utility model, compared with the traditional vertical O-ring assembly, increases the assembly efficiency by 2 times, reduces the O-ring breakage rate to 0.1%, improves the pass rate of the sealing test by 50% after assembly, and ensures the sealing effect of the product. There are zero O-ring edge breakage, twisting, and deformation, which provides a guarantee for long-term stable operation in the field. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the vertical assembly of the O-ring in this utility model.

[0015] Figure 2 for Figure 1 AA sectional view.

[0016] Figure 3 This is a schematic diagram of the limiting device in this utility model. Detailed Implementation

[0017] To enable those skilled in the art to more clearly understand the purpose, technical solution and advantages of this utility model, the present utility model will be further described below in conjunction with the accompanying drawings and embodiments.

[0018] In the description of this utility model, it should be understood that the orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "inner", "outer", "horizontal", and "vertical" are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0019] The present invention will now be described in detail with reference to the accompanying drawings: Figures 1-2 As shown, a novel tooling for vertical O-ring installation includes an O-ring 2 embedded in a connecting surface 1 (or connecting flange) between the heat exchanger gas chamber and tube sheet, and between the tube sheet and end plate. The edge of the connecting surface 1 extends outward to form a sealing surface 3. A ring of mounting through holes 4 is evenly formed on the sealing surface 3, and a sealing groove 5 parallel to the sealing surface 3 is formed on the inner side of the mounting through holes 4. A matching O-ring 2 is embedded and installed in the sealing groove 5. A limiting device is provided on the outer side of the O-ring 2 for temporary limiting of the O-ring 2. An adjusting nut is inserted into a portion of the mounting through holes 4 to fix the connecting surface 1 between the gas chamber and tube sheet, and between the tube sheet and end plate. At the same time, the limiting device is removed to complete the installation of the remaining bolts, thereby ensuring that the O-ring 2 will not shift due to tilting, vibration, or pressure during installation, ensuring the accuracy of the installation.

[0020] likeFigure 3 As shown, the limiting device is composed of a long strip-shaped fixing rod 6, a long head bolt 7 and an adjusting nut 8, a long head bolt 7 is respectively inserted into a mounting through hole 4 of a part of the sealing surface 3, the long head bolt 7 is exposed to the mounting through hole 4 after penetrating the mounting through hole 4, and a working part 9 and an assembly part 10 are respectively formed, the adjusting nut 8 is sleeved and mounted on the outside of the assembly part 10, a placing through hole 11 horizontally penetrating the long head bolt 7 is formed in the side of the working part 9, the long strip-shaped fixing rod 6 is horizontally inserted and mounted in the placing through hole 11, so that the long strip-shaped fixing rod 6 is perpendicular to the long head bolt 7, the position of the long head bolt 7 is adjusted through the adjusting nut 8, so that the long strip-shaped fixing rod 6 is tightly attached to and abuts against the O-shaped ring 2, and the O-shaped ring 2 is temporarily limited and fixed. The diameter of the placing through hole in the utility model is slightly larger than the diameter of the long strip-shaped fixing rod, so that when the adjusting nut is tightened on the long head bolt, the long strip-shaped fixing rod will not produce a large angle under stress, and the limiting effect is guaranteed.

[0021] One end of the long strip-shaped fixing rod 6 is provided with a limiting block 12 with a diameter larger than that of the long strip-shaped fixing rod 6, which is used for preventing the long strip-shaped fixing rod 6 from falling off from the placing through hole 11 of the long head bolt 7 during use.

[0022] The diameter of the working part 9 of the long head bolt 7 is smaller than that of the assembly part 10, which is used for facilitating the insertion of the long head bolt 7 into the mounting through hole 4 and facilitating the distinction, so that the overall installation efficiency is improved. The number of the long strip-shaped fixing rod 6, the long head bolt 7 and the adjusting nut 8 is eight groups, and they are uniformly distributed in eight directions of the O-shaped ring 2, which is used for guaranteeing the temporary limiting and fixing of the O-shaped ring 2.

[0023] Of course, the number and position of the long strip-shaped fixing rod, the long head bolt and the adjusting nut can be adjusted according to actual needs, and the number of points can be appropriately increased or decreased according to the size of the O-shaped ring, so that the limiting of the O-shaped ring is met, and no limitation is made.

[0024] The surface of the long strip-shaped fixing rod 6 is smooth, and the head part is a semicircular head shape 13, which is convenient for extraction and avoids damage to the O-shaped ring 2.

[0025] After the O-shaped ring point position is limited by the limiting device, the corresponding assembly parts are hoisted, when the corresponding assembly parts are assembled to press on the surface of the long strip-shaped fixing rod, the two parts are pre-fixed (the gap is smaller than the diameter of the O-shaped ring), and the adjusting nuts in all the limiting devices are loosened, the long strip-shaped fixing rod and the long head bolt are extracted, and then the normal process of fixing is carried out.

[0026] The novel tool for O-ring vertical installation can replace traditional O-ring vertical assembly, solves damage and destruction caused by O-ring and sealing surface during assembly, guarantees sealing performance of the product and reliability of stable operation in later period, and simultaneously reduces assembly workload.

[0027] The specific embodiments described herein are merely illustrative of the principles of the present application and its efficacy, and are not intended to limit the present application. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present application. Therefore, all equivalent modifications or changes made by those skilled in the art without departing from the spirit and technical concept disclosed by the present application should be covered by the claims of the present application.

Claims

1. A novel tooling for vertical O-ring installation, comprising an O-ring (2) embedded in the connecting surface (1) between the heat exchanger gas chamber and the tube sheet, and between the tube sheet and the end plate, characterized in that: The edge of the connecting surface (1) extends outward to form a sealing surface (3). A ring of mounting through holes (4) is evenly opened on the sealing surface (3). A ring of sealing grooves (5) parallel to the sealing surface (3) is also opened on the inner side of the mounting through holes (4). An O-ring (2) that matches it is embedded and installed in the sealing groove (5). A limiting device is set on the outer side of the O-ring (2) to temporarily limit the O-ring (2). The mounting bolts and adjusting nuts are inserted into part of the mounting through holes (4) to fix the connecting surface (1) between the air chamber and the tube sheet, and between the tube sheet and the end plate. At the same time, the limiting device is removed and the remaining bolts are installed. This ensures that the O-ring (2) will not shift due to tilting, vibration, or pressure during the installation process, and ensures the accuracy after installation.

2. The novel tooling for vertical installation of O-rings according to claim 1, characterized in that: The limiting device consists of a long strip-shaped fixing rod (6), a long head bolt (7), and an adjusting nut (8). A long head bolt (7) is inserted into the through hole (4) of the sealing surface (3). The long head bolt (7) passes through the through hole (4) and its two ends are exposed outside the through hole (4), forming a working part (9) and an assembly part (10) respectively. An adjusting nut (8) is fitted on the outside of the assembly part (10). A horizontal through hole (11) for placing the long head bolt (7) is opened on the side of the working part (9). A long strip-shaped fixing rod (6) is horizontally inserted into the through hole (11) so that the long strip-shaped fixing rod (6) is perpendicular to the long head bolt (7). The position of the long head bolt (7) is adjusted by adjusting the nut (8) so that the long strip-shaped fixing rod (6) is close to and abuts against the O-ring (2) to temporarily limit and fix the O-ring (2).

3. The novel tooling for vertical installation of O-rings according to claim 2, characterized in that: One end of the long strip fixing rod (6) is provided with a limiting block (12) with a diameter larger than that of the long strip fixing rod (6) to prevent the long strip fixing rod (6) from falling out of the placement through hole (11) of the long head bolt (7) during use.

4. The novel tooling for vertical installation of O-rings according to claim 3, characterized in that: The diameter of the working part (9) of the long head bolt (7) is smaller than the diameter of the assembly part (10), which facilitates the insertion of the long head bolt (7) into the mounting through hole (4) and makes it easier to distinguish, thereby improving the overall installation efficiency.

5. The novel tooling for vertical installation of O-rings according to claim 4, characterized in that: The number of the long strip fixing rod (6), long head bolt (7) and adjusting nut (8) is eight sets, and they are evenly distributed in eight positions of the O-ring (2) to ensure temporary limiting and fixing of the O-ring (2).

6. The novel tooling for vertical installation of O-rings according to claim 5, characterized in that: The surface of the long strip fixing rod (6) is smooth and the head is semi-circular (13), which makes it easy to remove and avoids sharp damage to the O-ring (2).

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