A kind of pipe welding spot shaping and protection tool

Abstract

The utility model discloses a pipe welding point shaping and protection tool, which belongs to the technical field of shaping tool. The tool of the utility model comprises: a first shell; a second shell, which can be opened and closed with the first shell, a cavity for placing the pipe welding point part is surrounded by the first shell and the second shell, a through hole is formed between one end of the second shell and the first shell, which is connected with the cavity, and a clamping part for clamping the pipe is provided between the other end of the second shell and the first shell; a pipe winding guide column, which is arranged at the other end of the second shell and located outside the first shell, and is used for pipe shaping. In the utility model, a clamping part and a pipe winding guide column are provided, the part of the pipe with welding point is located in the cavity, and the part of the pipe clamped by the clamping part has no welding point. The pipe is shaped by the pipe winding guide column, and the stress point of the pipe is located at the part of the pipe clamped by the clamping part without welding point. The stress point is transferred from the welding point, which can avoid the stress at the pipe welding point causing the welding point to break, which is beneficial to protect the pipe and avoid pipe leakage.

Description

Technical Field

[0001] The utility model relates to the technical field of shaping tooling, in particular to a pipeline welding point shaping protection tooling. Background Art

[0002] With the rapid development of China's manufacturing industry, the requirements for product quality are getting higher and higher. The manufacturing quality and efficiency of the home appliance industry are gradually improving, and the quality requirements for pipelines installed in home appliances are particularly strict. Pipelines are often used to transport liquids or gases, and they are required to have good sealing properties to avoid leakage.

[0003] Pipes are usually divided into metal pipes and non-metal pipes according to their materials. Metal pipes often need to be welded with other pipes to increase their length because the length of a single pipe is not enough. Some existing pipes need to be reshaped after welding, and the reshaping method for pipes after welding is required to be high.

[0004] The existing pipe shaping after welding often causes a large number of pipe welds to crack. When these pipes are used in household or commercial refrigeration appliances such as refrigerators and freezers, they will cause refrigerant leakage. These non-refrigerating products will flow into the market, which will not only pollute the environment, but also need to be repaired, greatly reducing the market competitiveness of the products. The shaping of the drying tube is mainly done by manual bending. The disadvantage of this production method is that the welds are easily cracked due to stress, and the consistency of the shaping state is poor, and the quality cannot be effectively guaranteed. In order to meet the needs of production efficiency and quality and improve the market competitiveness of products, a protective tool for shaping the refrigerator drying tube is specially designed to improve the leakage protection of the drying tube welds. Utility Model Content

[0005] The utility model aims to provide a pipeline welding point shaping protection tool to solve the technical problem of pipeline leakage caused by welding point cracks caused by shaping after pipeline welding.

[0006] The purpose of the utility model can be achieved through the following technical solutions:

[0007] A pipeline welding spot shaping and protection tool, comprising:

[0008] a first shell;

[0009] The second shell is closable with the first shell, a cavity for placing the pipe welding point is surrounded by the first shell and the second shell, a through hole is formed between one end of the second shell and the first shell, and is connected with the cavity, and a clamping part for clamping the pipe is provided between the other end of the second shell and the first shell;

[0010] The pipe-winding guide column is arranged at the other end of the second shell and located outside the first shell, and is used for pipe shaping.

[0011] As a further solution of the utility model: one side of the second shell in the width direction is movably connected to the first shell, the cavity is extended along the length direction of the second shell, and the through hole and the clamping part are respectively arranged at both ends of the second shell in the length direction.

[0012] As a further solution of the utility model: the cavity includes an installation cavity and a protective cavity, the inner diameters at both ends of the installation cavity are gradually contracted outward, the two ends of the installation cavity are respectively connected to the through hole and the protective cavity, the inner diameter of the protective cavity is larger than the inner diameter of the end of the installation cavity, and the clamping portion is arranged at the outer edge of the protective cavity.

[0013] As a further solution of the utility model: the through hole, the installation cavity and the protection cavity are symmetrically arranged on the first shell and the second shell.

[0014] As a further solution of the utility model: the clamping part includes a first clamping groove and a second clamping groove, the first shell cover is arranged on the inner wall of the second shell and is recessed inward to form the first clamping groove, the second shell cover is arranged on the inner wall of the first shell and is recessed inward to form the second clamping groove, and the bottom wall of the second clamping groove is arranged parallel to the bottom wall of the first clamping groove.

[0015] As a further solution of the utility model: the other end of the second shell protrudes from the first shell in the length direction, the tube guide column is arranged on the protruding part of the second shell and is located on the inner wall of the first shell covered by the second shell, and the tube guide column is spaced apart from the first shell.

[0016] As a further solution of the utility model: the through hole and the cavity are extended along the same center line, and the distance from the center line to the inner peripheral wall of the through hole is equal to the distance from the extension line of the center line to the side wall of the winding tube guide column.

[0017] As a further solution of the utility model: one end of the winding tube guide column close to the first shell is recessed inward to form a notch groove, and the other end of the winding tube guide column is provided with an arc surface.

[0018] As a further solution of the utility model: the other end of the second shell is connected to an arc block, and the other end of the pipe-winding guide column is arranged on the arc block.

[0019] As a further solution of the utility model: the pipeline weld spot shaping protection tool also includes a self-locking chain for adjusting the opening and closing angle of the first shell and the second shell, which is arranged between the first shell and the second shell.

[0020] Beneficial effects of the utility model:

[0021] (1) In the present invention, a clamping portion and a pipe guide column are provided, the portion of the pipe having a welding point is located in the cavity, the portion of the pipe clamped by the clamping portion has no welding point, the pipe is shaped by the pipe guide column, the stress point of the pipe is located at the portion of the pipe clamped by the clamping portion without a welding point, the stress point is transferred from the welding point, and the stress at the welding point of the pipe can be avoided to cause the welding point to break, which is beneficial to protecting the pipe and avoiding pipe leakage; and the shaping by the pipe guide column is beneficial to improving the bending consistency of the pipe and facilitating the flow of fluid.

[0022] (2) In the present invention, the inner diameters of both ends of the installation cavity are gradually contracted outward, which can limit the positions of both ends of the pipeline and prevent the pipeline from being displaced during shaping, thereby affecting the shaping.

[0023] (3) In the present invention, the distance from the center line to the inner wall of the through hole is equal to the distance from the extended line of the center line to the side wall of the pipe guide pin, so that the pipe can be arranged along the center line of the through hole and the cavity, and the pipe from the clamping portion to the pipe guide pin is arranged parallel to one side wall of the pipe guide pin, so that when the pipe is shaped, the force on the pipe is uniform, thereby avoiding deformation of the pipe at the clamping portion. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The utility model is further described below in conjunction with the accompanying drawings.

[0025] Figure 1 This is a front view of a pipe welding point shaping and protection tooling of the utility model;

[0026] Figure 2 It is a left view of a pipe welding point shaping and protecting tooling of the utility model;

[0027] Figure 3 It is a top view of a pipe welding point shaping and protecting tooling of the utility model;

[0028] Figure 4 The utility model is a structural schematic diagram of a pipeline welding point shaping and protecting tooling.

[0029] In the figure: 1. first shell; 2. second shell; 21. arc block; 3. cavity; 31. installation cavity; 32. protection cavity; 4. through hole; 5. clamping part; 51. first clamping groove; 52. second clamping groove; 6. pipe guide column; 61. notch groove; 7. self-locking chain. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0031] See also Figure 1-4 As shown, the utility model is a pipeline welding point shaping and protection tool, which includes a first shell 1, a second shell 2 and a pipe-winding guide column 6.

[0032] The second shell 2 and the first shell 1 can be opened and closed, a cavity 3 for placing the pipe welding point is surrounded between the first shell 1 and the second shell 2, a through hole 4 is formed between one end of the second shell 2 and the first shell 1, and is connected to the cavity 3, and a clamping part 5 for clamping the pipe is provided between the other end of the second shell 2 and the first shell 1;

[0033] The pipe-winding guide column 6 is arranged at the other end of the second shell 2 and outside the first shell 1, and is used for pipe shaping.

[0034] In the above scheme, a clamping portion 5 and a pipe-winding guide column 6 are provided, the portion of the pipe having a welding point is located in the cavity 3, the portion of the pipe clamped by the clamping portion 5 has no welding point, the pipe is shaped by the pipe-winding guide column 6, the stress point of the pipe is located at the portion of the pipe clamped by the clamping portion 5 without a welding point, the stress point is transferred from the welding point, and the stress at the welding point of the pipe can be prevented from being broken due to the stress on the welding point of the pipe, which is beneficial to protecting the pipe and avoiding pipe leakage; and the shaping by the pipe-winding guide column 6 is beneficial to improving the bending consistency of the pipe and facilitating the flow of fluid.

[0035] Specifically, the first shell 1 is located above the second shell 2, and the first shell 1 is connected to one side wall of the second shell 2, so that the first shell 1 and the second shell 2 can be opened and closed, and a cavity 3 is enclosed between the two inner walls that fit together. The pipe is placed in the cavity 3, one end passes through the through hole 4, and the other end passes through the clamping part 5 and is wound around the pipe guide column 6 for shaping, and the part of the pipe with the welding point is located in the cavity 3.

[0036] When in use, first open the first shell 1 and the second shell 2, put the part of the pipe with the welding point into the cavity 3, one end of the pipe passes through the through hole 4, and the part of the other end of the pipe that needs to be shaped extends to the other end of the second shell 2 and passes through the clamping part 5, and then cover the first shell 1 and the second shell 2, the part of the pipe with the welding point is protected in the cavity 3, and the part of the pipe without the welding point is clamped between the clamping parts 5, and the other end of the pipe that needs to be shaped is also located outside the first shell 1. At this time, the pipe can be shaped by wrapping around the pipe guide column 6. During the shaping process, the part of the pipe with the welding point is not subjected to external force, and the force point is transferred to the pipe clamped in the clamping part 5. The pipe at this location has no welding point, and the pipe will not be cracked, which is beneficial to protecting the integrity of the pipe; and by wrapping around the pipe guide column 6 for shaping, no manual bending is required, which is beneficial to improving the bending consistency of the pipe, avoiding irregular bending of the pipe, and reducing energy loss during fluid flow, which can make the fluid flow smoothly and enhance the performance of the pipe.

[0037] The length direction of the first shell 1 is consistent with the length direction of the second shell 2 , and the width direction of the first shell 1 is consistent with the width direction of the second shell 2 .

[0038] In one embodiment of the utility model, one side of the second shell 2 in the width direction or the length direction is movably connected to the first shell 1, the cavity 3 is extended along the width direction or the length direction, and the through hole 4 and the clamping part 5 are respectively arranged at both ends in the width direction or the length direction.

[0039] Specifically, the above scheme includes two situations. One is that one side of the second shell 2 in the width direction is movably connected to the first shell 1, the cavity 3 is extended along the width direction, and the through hole 4 and the clamping part 5 are respectively arranged at both ends of the width direction; the other is that one side of the second shell 2 in the length direction is movably connected to the first shell 1, the cavity 3 is extended along the length direction, and the through hole 4 and the clamping part 5 are respectively arranged at both ends of the length direction.

[0040] When the above solution is operated, when the first shell 1 and the second shell 2 are opened and closed, the side where the first shell 1 and the second shell 2 are connected is likely to affect the placement of the pipeline, which is likely to cause interference and is inconvenient to use.

[0041] Another implementation mode of the present invention is as follows: Figure 1 and Figure 4 As shown, one side of the second shell 2 in the width direction is movably connected to the first shell 1, the cavity 3 is extended along the length direction of the second shell 2, and the through hole 4 and the clamping part 5 are respectively arranged at both ends of the second shell 2 in the length direction.

[0042] In the above scheme, when the first shell 1 and the second shell 2 are opened and closed, the opening and closing angle of the first shell 1 and the second shell 2 in the length direction is relatively large, which will not easily affect the placement of the pipeline, and the two will not interfere with each other, which is convenient for use.

[0043] Similarly, it can be arranged that one side of the second shell 2 in the length direction is movably connected to the first shell 1, the cavity 3 is extended along the width direction of the second shell 2, and the through hole 4 and the clamping part 5 are respectively arranged at both ends of the second shell 2 in the width direction.

[0044] Preferably, the first shell 1 and the second shell 2 are both small at both ends and large in the middle. The large in the middle and small at both ends are convenient for operators to hold and use.

[0045] like Figure 1 and Figure 4 As shown, the cavity 3 includes an installation cavity 31 and a protective cavity 32. The inner diameters of both ends of the installation cavity 31 are gradually contracted outward. The two ends of the installation cavity 31 are respectively connected to the through hole 4 and the protective cavity 32. The inner diameter of the protective cavity 32 is larger than the inner diameter of the end of the installation cavity 31. The clamping portion 5 is arranged at the outer edge of the protective cavity 32.

[0046] In the above solution, the inner diameters of both ends of the installation cavity 31 are gradually contracted outwards, which can limit the two ends of the pipeline and prevent the pipeline from being displaced during shaping, thereby affecting the shaping.

[0047] Specifically, the inner diameter of the through hole 4 is the same as the inner diameter of the end of the installation cavity 31, which is convenient for limiting the position of the pipeline. The portion of the pipeline with the welding point is located in the protection cavity 32. The welding point on the pipeline will increase the overall outer diameter. The inner diameter of the protection cavity 32 is larger than the inner diameter of the end of the installation cavity 31, which can avoid the inner wall of the protection cavity 32 squeezing the welding point and causing the welding point to crack, so as to protect the integrity of the pipeline.

[0048] like Figure 1 and Figure 4 As shown, the through hole 4 , the installation cavity 31 and the protection cavity 32 are symmetrically arranged on the first shell 1 and the second shell 2 .

[0049] Specifically, the through hole 4, the installation cavity 31 and the protection cavity 32 are symmetrically arranged on the first shell 1 and the second shell 2, which is convenient for processing and forming the through hole 4, the installation cavity 31 and the protection cavity 32; they are symmetrically arranged on the first shell 1 and the second shell 2, and the tooling can be placed forward and backward to shape the pipeline, which is convenient for pipeline placement. The clamping part 5 is arranged on the first shell 1 and the second shell 2 at the same time.

[0050] In the above solution, the through hole 4 , the installation cavity 31 and the two parts of the protection cavity 32 may also be asymmetrically arranged on the first shell 1 and the second shell 2 .

[0051] like Figure 4 As shown, the clamping portion 5 includes a first clamping groove 51 and a second clamping groove 52. The first shell 1 is covered on the inner wall of the second shell 2 and is recessed inwardly to form the first clamping groove 51. The second shell 2 is covered on the inner wall of the first shell 1 and is recessed inwardly to form the second clamping groove 52. The bottom wall of the second clamping groove 52 is parallel to the bottom wall of the first clamping groove 51.

[0052] Specifically, the bottom wall of the second clamping groove 52 and the bottom wall of the first clamping groove 51 squeeze the two sides of the pipeline respectively, and can clamp the pipeline to prevent shaking during pipeline shaping. The contact points between the bottom wall of the second clamping groove 52 and the bottom wall of the first clamping groove 51 and the two sides of the pipeline are the force points during pipeline shaping.

[0053] Preferably, the first clamping groove 51 extends along the length direction of the first shell 1 from the connection between the installation cavity 31 and the protection cavity 32 to the end surface of the first shell 1 .

[0054] The first clamping groove 51 is disposed on the outer edge of the protection cavity 32 of the first shell 1 .

[0055] More preferably, the bottom wall of the second clamping groove 52 and the bottom wall of the first clamping groove 51 are both provided with an elastic layer, and the elastic layer is made of an elastic material.

[0056] The pipeline is located between the second clamping groove 52 and the first clamping groove 51, and the two elastic layers are in contact with the outer peripheral wall of the pipeline, which can prevent the pipeline from being squeezed and deformed.

[0057] The other end of the second shell 2 protrudes from the first shell 1 in the length direction, and the tube guide column 6 is arranged on the protruding part of the second shell 2 and located on the inner wall of the second shell 2 covering the first shell 1, and the tube guide column 6 is spaced apart from the first shell 1.

[0058] Specifically, the top surface or the bottom surface of the second shell 2 abuts against the bottom surface or the top surface of the first shell 1 , and the pipe winding guide column 6 is vertically arranged on the top surface or the bottom surface of the second shell 2 .

[0059] In the present invention, the top surface of the second shell 2 abuts against the bottom surface of the first shell 1 , and the pipe winding guide column 6 is vertically arranged on the top surface of the second shell 2 .

[0060] The pipe guide column 6 is perpendicular to the top surface of the second housing 2 and extends upward for a certain length. The second clamping groove 52 extends along the length direction for a certain length and exceeds the length of the first clamping groove 51 .

[0061] Part of the pipe-winding guide pin 6 is disposed on the bottom wall of the second clamping groove 52 .

[0062] There is a gap between the pipe guide post 6 and the first shell 1 in the length direction of the second shell 2 , and the first shell 1 does not contact the pipe guide post 6 when opening or closing.

[0063] The through hole 4 and the cavity 3 are extended along the same center line, and the distance from the center line to the inner peripheral wall of the through hole 4 is equal to the distance from the extended line of the center line to the side wall of the winding tube guide column 6.

[0064] In the above scheme, the distance from the center line to the inner wall of the through hole 4 is equal to the distance from the extended line of the center line to the side wall of the pipe guide column 6, so that the pipeline can be arranged along the center line of the through hole 4 and the cavity 3, and the pipeline from the clamping portion 5 to the pipe guide column 6 is arranged parallel to one side wall of the pipe guide column 6, so that when the pipeline is shaped, the pipeline is subjected to uniform force, thereby avoiding deformation of the pipeline at the clamping portion 5.

[0065] Specifically, the pipe winding guide column 6 is arranged on one side of the extension line of the center line.

[0066] When the pipe is placed in the tooling, one end of the pipe passes through the through hole 4, and the other end passes through the clamping portion 5, and is wound around the pipe winding guide column 6 for shaping.

[0067] like Figure 3 and Figure 4 As shown, one end of the winding tube guide column 6 close to the first shell 1 is recessed inward to form a notch groove 61, and the other end of the winding tube guide column 6 is provided with an arc surface.

[0068] In the above scheme, a notch groove 61 and an arc surface are provided on the pipe guide column 6. When the pipe is wound around the pipe guide column 6, deformation will occur at the notch groove 61 and the arc surface. There is no need to manually adjust the deformation angle, which can improve the bending consistency of the pipe.

[0069] Specifically, the two adjacent side walls of the pipe winding guide column 6 near the first housing 1 are recessed inward to form a notch groove 61, and the notch groove 61 extends downward from top to bottom to the bottom wall of the second clamping groove 52. The notch groove 61 has two adjacent and mutually perpendicular inner walls, and the two inner walls extend vertically inward. The ends of the two inner walls that are away from each other can form a deformation angle. When the pipe is wound around the pipe winding guide column 6, deformation will occur in the notch groove 61 and the arc surface.

[0070] The opening size, depth and opening direction of the notch groove 61 will affect the shape of the pipe. Similarly, the curvature of the arc surface will also affect the shape of the pipe. The corresponding notch groove 61 and arc surface can be set according to actual needs.

[0071] Preferably, the pipe winding guide column 6 is detachably arranged on the second shell 2 .

[0072] Specifically, multiple specifications of pipe winding guide columns 6 can be set. Different pipe winding guide columns 6 have different notched grooves 61 and arc-shaped surfaces. Different pipe winding guide columns 6 correspond to pipes of different shaped shapes. When shaping is required, just select the appropriate pipe winding guide column 6, thereby improving the applicability of the tooling and facilitating use.

[0073] like Figure 3 and Figure 4 As shown, the other end of the second shell 2 is connected to an arc block 21 , and the other end of the pipe-winding guide column 6 is disposed on the arc block 21 .

[0074] Specifically, one end of the arc block 21 is flush with one end of the pipe guide column 6, and the other end of the arc block 21 is arranged to exceed the length of the pipe guide column 6. The other end surface of the arc block 21 is arranged to be arc-shaped. The top surface of the arc block 21 forms a horseshoe surface except for the part of the pipe guide column 6. When the pipe is wound around the pipe guide column 6 for shaping, it is placed on the horseshoe surface.

[0075] The pipeline welding spot shaping protection tooling of the utility model further comprises a self-locking chain 7 for adjusting the opening and closing angle of the first shell 1 and the second shell 2 , which is arranged between the first shell 1 and the second shell 2 .

[0076] Specifically, a self-locking chain 7 is provided between the first shell 1 and the second shell 2, and the self-locking chain 7 has a certain locking force, so that the opening and closing angle between the first shell 1 and the second shell 2 can be adjusted and the adjusted angle is fixed, which is convenient for pipe placement. After the first shell 1 and the second shell 2 are covered, the first shell 1 and the second shell 2 are self-locking, and only a little external force is required from the user, which is convenient for the user to use.

[0077] The above is a detailed description of an embodiment of the utility model, but the content is only a preferred embodiment of the utility model and cannot be considered to limit the scope of implementation of the utility model. All equivalent changes and improvements made within the scope of application of the utility model should still fall within the scope of the patent coverage of the utility model.

Claims

1. A pipe welding spot shaping and protection tool, characterized in that: include: A first housing (1); a second shell (2) which can be opened and closed with the first shell (1); a cavity (3) for accommodating the welding point of the pipeline is arranged between the first shell (1) and the second shell (2); a through hole (4) is formed between one end of the second shell (2) and the first shell (1) and communicates with the cavity (3); a clamping portion (5) for clamping the pipeline is arranged between the other end of the second shell (2) and the first shell (1); A pipe-winding guide column (6) is arranged at the other end of the second shell (2) and located outside the first shell (1), and is used for pipe shaping.

2. A pipeline welding spot shaping and protection tooling according to claim 1, characterized in that: One side of the second shell (2) in the width direction is movably connected to the first shell (1), the cavity (3) is extended along the length direction of the second shell (2), and the through hole (4) and the clamping portion (5) are respectively arranged at two ends of the second shell (2) in the length direction.

3. A pipeline welding spot shaping and protection tooling according to claim 2, characterized in that: The cavity (3) comprises a mounting cavity (31) and a protective cavity (32); the inner diameters of both ends of the mounting cavity (31) are gradually contracted outward; the two ends of the mounting cavity (31) are respectively connected to the through hole (4) and the protective cavity (32); the inner diameter of the protective cavity (32) is larger than the inner diameter of the end of the mounting cavity (31); and the clamping portion (5) is arranged at the outer edge of the protective cavity (32).

4. A pipeline welding spot shaping and protection tooling according to claim 3, characterized in that: The through hole (4), the installation cavity (31) and the protection cavity (32) are all symmetrically arranged on the first shell (1) and the second shell (2).

5. A pipeline welding spot shaping and protection tooling according to claim 4, characterized in that: The clamping portion (5) comprises a first clamping groove (51) and a second clamping groove (52); the first shell (1) is covered on the inner wall of the second shell (2) and is recessed inwardly to form the first clamping groove (51); the second shell (2) is covered on the inner wall of the first shell (1) and is recessed inwardly to form the second clamping groove (52); the bottom wall of the second clamping groove (52) is parallel to the bottom wall of the first clamping groove (51).

6. A pipeline welding spot shaping and protection tool according to any one of claims 1 to 5, characterized in that: The other end of the second shell (2) is arranged to protrude from the first shell (1) in the length direction, and the pipe-winding guide column (6) is arranged on the protruding part of the second shell (2) and is located on the inner wall of the second shell (2) covering the first shell (1), and the pipe-winding guide column (6) is arranged at a distance from the first shell (1).

7. A pipeline welding spot shaping and protection tooling according to claim 6, characterized in that: The through hole (4) and the cavity (3) are extended along the same center line, and the distance from the center line to the inner peripheral wall of the through hole (4) is equal to the distance from the extended line of the center line to the side wall of the winding tube guide column (6).

8. The pipeline welding spot shaping and protection tooling according to claim 7 is characterized in that: One end of the winding tube guide column (6) close to the first shell (1) is recessed inwards to form a notch groove (61), and the other end of the winding tube guide column (6) is provided with an arc surface.

9. A pipeline welding spot shaping and protection tooling according to claim 8, characterized in that: The other end of the second shell (2) is connected to an arc block (21), and the other end of the pipe-winding guide column (6) is arranged on the arc block (21).

10. A pipeline welding spot shaping and protection tool according to any one of claims 1 to 5, characterized in that: It also comprises a self-locking chain (7) for adjusting the opening and closing angle of the first shell (1) and the second shell (2), and is arranged between the first shell (1) and the second shell (2).

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