Telescopic expansion joint for heat exchanger

Abstract

The telescopic expansion joint for the heat exchanger comprises an expansion joint body, a first flange plate is fixedly installed on the outer surface of the upper end of the expansion joint body, a second flange plate is fixedly installed on the outer surface of the lower end of the expansion joint body, and a guide limiting assembly is connected between the first flange plate and the second flange plate. The number of the guiding and limiting assemblies is two, the two guiding and limiting assemblies are installed between the left side and the right side of the first flange plate and the left side and the right side of the second flange plate, and each guiding and limiting assembly comprises a limiting plate, a limiting hole, a limiting pin assembly, a limiting groove and a movable block. According to the telescopic expansion joint for the heat exchanger, the guiding and limiting effects are achieved through the arranged guiding and limiting assembly, limiting failure is avoided, the limiting effect is achieved between the limiting plate and the movable block through the arranged limiting pin assembly, and the position of the limiting pin assembly can be conveniently adjusted according to needs.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of telescopic expansion joint, concretely to a telescopic expansion joint for heat exchanger. BACKGROUND

[0002] In the heat exchanger system, the telescopic expansion joint as an important compensation element is widely used in the pipeline connection for absorbing the displacement and vibration caused by thermal expansion and cold shrinkage. The existing telescopic expansion joint is usually fixed through the flange plates at both ends, and the telescopic amount of the expansion joint is adjusted in advance during installation, and the limiting is carried out through the screw rod and double nuts, and the excess amount is left for the subsequent thermal displacement.

[0003] However, this design has the following significant shortcomings:

[0004] 1. inconvenient adjustment: in the prior art, the adjustment of the limiting position depends on the rotating nut, and the operation process is cumbersome and not convenient, especially in the working condition that needs to be adjusted frequently, the efficiency is low;

[0005] 2. insufficient limiting stability: when limiting through the screw rod and double nuts, the locking effect of the double nuts depends on the artificial tightening torque, and under the action of long-term vibration or thermal expansion and cold shrinkage, the nut is easy to loosen due to the decrease of the pre-tightening force, which leads to the limiting failure, and further affects the normal work of the expansion joint, and even causes safety hazards;

[0006] 3. reliability problem: due to the risk of nut loosening and limiting failure, the existing expansion joint performs poorly under the working condition of high temperature, high pressure or strong vibration, and it is difficult to meet the use demand of high stability and long service life.

[0007] Therefore, we propose a telescopic expansion joint for heat exchanger. CONTENT OF THE UTILITY MODEL

[0008] (I) technical problem solved

[0009] In view of the shortcomings of the prior art, the utility model provides a telescopic expansion joint for heat exchanger, which can improve the stability of the limiting, avoid the limiting failure, and adjust the limiting amount according to the needs, and has the advantages of effectively solving the problems in the background art.

[0010] (II) technical scheme

[0011] In order to achieve the above object, the utility model takes the technical scheme for: a kind of telescopic expansion joint for heat exchanger, including expansion joint, the upper end outer surface of the expansion joint is fixedly installed with first flange plate, the lower end outer surface of the expansion joint is fixedly installed with second flange plate, guiding limiting assembly is connected between the first flange plate and second flange plate, the number of guiding limiting assembly is two groups, two groups guiding limiting assembly are installed between the left and right sides of first flange plate and the left and right sides of second flange plate, and guiding limiting assembly includes limiting plate, limiting hole, limiting pin assembly, limiting groove and movable block, and the limiting pin assembly includes pin shaft, limiting block, mounting hole, compression spring, clamping column and semicircular end, and the number of limiting plate in one group guiding limiting assembly is two groups, and the upper portion of one side outer surface of two groups limiting plate is fixedly connected with the one side outer surface of first flange plate, and the lower portion of one side outer surface of movable block is fixedly connected with the one side outer surface of second flange plate.

[0012] Preferably, the limiting holes are equidistantly arranged on one side of the limiting plate, and the movable blocks are slidingly connected between the two groups of limiting plates.

[0013] Preferably, the limiting grooves are arranged on one side of the movable blocks, and the pin shafts of the limiting pin assemblies pass through the limiting holes and the limiting grooves of the two groups of limiting plates.

[0014] Preferably, the limiting blocks are fixedly installed on one end of the pin shafts, and the mounting holes are arranged on the upper end outer surfaces of the pin shafts away from the limiting blocks.

[0015] Preferably, the compression springs are located in the mounting holes, the lower end outer surfaces of the compression springs are fixedly connected with the bottoms of the mounting holes, the upper end outer surfaces of the compression springs are fixedly connected with the lower end outer surfaces of the clamping columns, and the semicircular end is fixedly installed on the upper end outer surface of the clamping column.

[0016] Preferably, the clamping column, the semicircular end and the mounting hole are slidingly connected, and the lower end outer surface of the clamping column is elastically connected with the bottom of the mounting hole through the compression spring.

[0017] (Three) beneficial effects

[0018] Compared with the prior art, the utility model provides a telescopic expansion joint for heat exchanger, which has the following beneficial effects:

[0019] 1、This telescopic expansion joint for heat exchanger, through the setting of guiding limiting assembly, can effectively guide the telescopic movement of expansion joint, avoid the deviation or failure problem caused by vibration or thermal expansion and contraction, significantly improve the stability and reliability of expansion joint.

[0020] 2、The heat exchanger telescopic expansion joint adopts a limiting pin assembly to replace the traditional screw and nut structure, and through the cooperation of the pin shaft and the limiting hole, the limiting position can be quickly adjusted, the operation is simple, the nut does not need to be repeatedly tightened, and the adjusting efficiency and convenience are greatly improved.

[0021] 3、The heat exchanger telescopic expansion joint, the compression spring and the clamping column structure in the limiting pin assembly can automatically lock the pin shaft, prevent accidental loosening under the action of vibration or thermal stress, ensure firm and reliable limiting, and reduce the maintenance frequency and fault risk. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is a whole structure schematic view of the heat exchanger telescopic expansion joint.

[0023] Figure 2 It is a structure schematic view of the guide limiting assembly in the heat exchanger telescopic expansion joint.

[0024] Figure 3 It is a structure exploded view of the guide limiting assembly in the heat exchanger telescopic expansion joint.

[0025] Figure 4 It is a side view sectional view of the limiting pin assembly in the heat exchanger telescopic expansion joint.

[0026] In the figure: 1, expansion joint; 2, first flange plate; 3, second flange plate; 4, guide limiting assembly; 5, limiting plate; 6, limiting hole; 7, limiting pin assembly; 8, limiting groove; 9, pin shaft; 10, limiting block; 11, mounting hole; 12, compression spring; 13, clamping column; 14, semicircular end; 15, movable block. DETAILED DESCRIPTION

[0027] In order to make the technical means, creative features, purposes and effects achieved by the utility model easy to understand, the utility model is further described below in combination with specific embodiments.

[0028] The embodiment is a heat exchanger telescopic expansion joint.

[0029] As Figures 1-4As shown, including expansion joint 1, the upper end of the outer surface of expansion joint 1 is fixedly installed with first flange plate 2, the lower end of the outer surface of expansion joint 1 is fixedly installed with second flange plate 3, first flange plate 2 and second flange plate 3 are connected with guide limiting assembly 4, the number of guide limiting assembly 4 is two groups, two groups of guide limiting assembly 4 are installed between the left and right sides of first flange plate 2 and the left and right sides of second flange plate 3, guide limiting assembly 4 includes limiting plate 5, limiting hole 6, limiting pin assembly 7, limiting groove 8 and movable block 15, and limiting pin assembly 7 includes pin shaft 9, limiting block 10, mounting hole 11, compression spring 12, clamping column 13 and semicircular end 14, and the number of limiting plate 5 in one group of guide limiting assembly 4 is two groups, the upper part of one side of the outer surface of the two groups of limiting plate 5 is fixedly connected with the outer surface of one side of first flange plate 2, and the lower part of one side of the outer surface of movable block 15 is fixedly connected with the outer surface of one side of second flange plate 3.

[0030] Limiting hole 6 is equidistantly arranged on one side of the outer surface of limiting plate 5, and movable block 15 is slidingly connected between the two groups of limiting plate 5; limiting groove 8 is arranged on one side of the outer surface of movable block 15, and pin shaft 9 of limiting pin assembly 7 penetrates limiting hole 6 and limiting groove 8 in the two groups of limiting plate 5; limiting block 10 is fixedly installed on one end of the outer surface of pin shaft 9, and mounting hole 11 is arranged on the upper end of the outer surface of pin shaft 9 away from limiting block 10; compression spring 12 is located in mounting hole 11, the lower end of the outer surface of compression spring 12 is fixedly connected with the bottom of mounting hole 11, the upper end of the outer surface of compression spring 12 is fixedly connected with the lower end of the outer surface of clamping column 13, and semicircular end 14 is fixedly installed on the upper end of the outer surface of clamping column 13; clamping column 13, semicircular end 14 and mounting hole 11 are in sliding connection, and the lower end of the outer surface of clamping column 13 is elastically connected with the bottom of mounting hole 11 through compression spring 12.

[0031] It needs explanation, the utility model discloses a heat exchanger telescopic expansion joint, the expansion joint 1, first flange plate 2 and second flange plate 3 recorded in the paper all belong to prior art, for the technical personnel of the technical field, it is effective to know, specific no longer repeat; The guiding and limiting component 4 is set, when the expansion joint 1 thermal expansion and cold contraction drive the relative sliding between the limiting plate 5 and the movable block 15, the pin shaft 9 in the limiting pin assembly 7 is through the limiting hole 6 and the limiting groove 8, the movable block 15 is positioned by the pin shaft 9, and the nut falling failure problem in prior art will not appear;If the position of limiting pin assembly 7 needs to be changed, first disassembly, pull the movable block 15, so that the upper portion of limiting groove 8 is against the upper end outer surface of pin shaft 9 in order to position the clamping column 13 and semicircular end 14, after the upper portion of limiting groove 8 is against the upper end outer surface of pin shaft 9, manually press the semicircular end 14, the semicircular end 14 drives the clamping column 13 along the mounting hole 11 and extrudes the compression spring 12, then pull out the limiting block 10, the limiting block 10 drives the pin shaft 9 along the limiting hole 6 and the limiting groove 8 and pulls out;When installing, extrude the semicircular end 14 and the clamping column 13, after the semicircular end 14 and the clamping column 13 enter the mounting hole 11, the pin shaft 9 is through the limiting hole 6 and the limiting groove 8, then pull down the movable block 15, the top of limiting groove 8 extrudes and positions the semicircular end 14, then continue to push the pin shaft 9, so that the pin shaft 9 is through the limiting hole 6 in another set of limiting plate 5, after the clamping column 13 and semicircular end 14 penetrate the limiting hole 6, the clamping column 13 and semicircular end 14 are reset due to the counterforce of compression spring 12, realize assembly, it is convenient to adjust the position of limiting pin assembly 7 according to the need, change the limiting amount of expansion joint 1 telescopic.

[0032] It needs explanation, in this paper, such as first and second (one, two) relationship terms are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between the entities or operations. Moreover, the term "include", "contain" or any other variant thereof is intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or includes elements inherent in such process, method, article or equipment. Without more limitation, the element defined by the statement "including a" does not exclude the existence of other identical elements in the process, method, article or equipment including the element.

[0033] The basic principle and main features of the present application and the advantages of the present application are shown and described above. Those skilled in the art should understand that the present application is not limited by the above examples, and the above examples and descriptions in the specification are only to illustrate the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the present application.

Claims

1. A telescopic expansion joint for heat exchangers, comprising an expansion joint (1), a first flange plate (2) is fixedly installed on the outer surface of the upper end of the expansion joint (1), and a second flange plate (3) is fixedly installed on the outer surface of the lower end of the expansion joint (1), characterized in that: The first flange plate (2) and the second flange plate (3) are connected with the guide limiting assembly (4), the number of the guide limiting assembly (4) is two groups, two groups of the guide limiting assembly (4) are installed between the left and right sides of the first flange plate (2) and the left and right sides of the second flange plate (3), the guide limiting assembly (4) comprises a limiting plate (5), a limiting hole (6), a limiting pin assembly (7), a limiting groove (8) and a movable block (15), and the limiting pin assembly (7) comprises a pin shaft (9), a limiting block (10), a mounting hole (11), a compression spring (12), a clamping column (13) and a semicircular end (14), and the number of the limiting plate (5) in one group of the guide limiting assembly (4) is two groups, and the upper part of the outer surface of one side of the two groups of limiting plates (5) is fixedly connected with the outer surface of one side of the first flange plate (2), and the lower part of the outer surface of one side of the movable block (15) is fixedly connected with the outer surface of one side of the second flange plate (3).

2. The expansion joint according to claim 1, wherein: The limiting hole (6) is equidistantly arranged on the outer surface of one side of the limiting plate (5), and the movable block (15) is slidingly connected between the two groups of limiting plates (5).

3. The expansion joint according to claim 2, wherein: The limiting groove (8) is arranged on the outer surface of one side of the movable block (15), and the pin shaft (9) of the limiting pin assembly (7) penetrates the limiting hole (6) and the limiting groove (8) in the two groups of limiting plates (5).

4. The expansion joint according to claim 3, wherein: The limiting block (10) is fixedly installed on the outer surface of one end of the pin shaft (9), and the mounting hole (11) is arranged on the outer surface of the upper end of the pin shaft (9) away from the limiting block (10).

5. The expansion joint according to claim 4, wherein: The compression spring (12) is located in the mounting hole (11), the lower end surface of the compression spring (12) is fixedly connected with the bottom of the mounting hole (11), the upper end surface of the compression spring (12) is fixedly connected with the lower end surface of the clamping column (13), and the semicircular end (14) is fixedly installed on the upper end surface of the clamping column (13).

6. The expansion joint according to claim 5, wherein: The clamping column (13), the semicircular end (14) and the mounting hole (11) are slidingly connected, and the lower end surface of the clamping column (13) is elastically connected with the bottom of the mounting hole (11) through the compression spring (12).

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