Fixing device for spiral pipe of heat exchanger

Abstract

The invention discloses a fixing device for a spiral pipe of a heat exchanger. The fixing device for the spiral pipe of the heat exchanger is formed by combining a plurality of clamping plates. Wherein the clamping plates are divided into two types, namely single-side clamping plates and double-side clamping plates; one side of the long edge of the single-side clamping plate is provided with a comb tooth structure, and the two sides of the long edge of the double-side clamping plate are provided with comb tooth structures. According to the device, through different combination forms of the clamping plates, the fixing requirements of the spiral pipes with different layer number layouts can be met, installation is flexible, the spiral pipes are protected against scratching and damage in the vibration environment, and the structural reliability of the heat exchanger is ensured.

Description

Technical Field

[0001] The invention belongs to the technical field of rocket engine design, and in particular relates to a fixing device for a spiral tube of a heat exchanger. Background Art

[0002] During the operation of the rocket engine, the tank pressure continues to decrease as the propellant flows out. In order to ensure the normal operation of the engine, a certain pressure needs to be maintained in the tank. The heat exchanger on the liquid rocket engine can meet the needs of tank pressurization. This type of heat exchanger is mostly a spiral tube heat exchanger. The low-temperature medium flows in the spiral tube, and the high-temperature gas flows in the heat exchanger shell. The low-temperature medium enters the tank for pressurization after being heated by the high-temperature gas. The heat exchanger on the liquid rocket engine is installed at the turbine outlet. The vibration environment is complex, and the spiral tube will also move accordingly; the spiral tube is connected to the heat exchanger shell by welding. The irregular movement of the spiral tube under the vibration environment seriously threatens the reliability of the weld. Therefore, it is necessary to reliably fix the spiral tube to avoid large movement and endanger the structural reliability. In order to meet the heat exchange requirements, it is necessary to arrange multiple layers of spiral tubes along the diameter in the heat exchanger shell. Compared with single-layer spiral tubes, the fixing requirements of multi-layer spiral tubes are higher and more difficult, so it is necessary to install a reliable fixing device. Summary of the invention

[0003] The technology of the present invention solves the problem: overcomes the shortcomings of the prior art and provides a fixing device for the spiral tube of a heat exchanger. The fixing requirements of spiral tubes with different numbers of layers can be met through different combinations of clamps. The installation is flexible and the spiral tubes are protected from being scratched and damaged in a vibration environment, thereby ensuring the structural reliability of the heat exchanger.

[0004] In order to solve the above technical problems, the present invention discloses a fixing device for a spiral tube of a heat exchanger, which is composed of a plurality of clamping plates; wherein the clamping plates are divided into two categories: a single-sided clamping plate and a double-sided clamping plate; a single-sided clamping plate is a clamping plate with a comb tooth structure on one side of the long side, and a double-sided clamping plate is a clamping plate with a comb tooth structure on both sides of the long side.

[0005] In the above-mentioned fixing device for the spiral tube of the heat exchanger, the comb-tooth structure is composed of a plurality of grooves and arcs; wherein the plurality of grooves are evenly distributed on the side of the clamping plate, and every two grooves are connected by a transitional arc.

[0006] In the above-mentioned fixing device for the spiral tube of the heat exchanger, the fixing device for the spiral tube of the heat exchanger clamps the spiral tube through the comb teeth structure to fix the spiral tube.

[0007] In the above-mentioned fixing device for the spiral tube of the heat exchanger, the fixing device for the spiral tube of the heat exchanger realizes the fixing of the spiral tube through the combination of the single-side clamping plate and the double-side clamping plate.

[0008] In the above-mentioned fixing device of the spiral tube of the heat exchanger, for the multi-layer spiral tubes, double-sided clamps are installed between every two spiral tubes, and single-sided clamps are installed on the outside of the outermost spiral tube and the outer side of the innermost spiral tube respectively, forming a form in which two clamps are arranged inside and outside each layer of spiral tube to fix the multi-layer spiral tubes.

[0009] In the above-mentioned fixing device for the spiral tube of the heat exchanger, the end types of the clamping plate are divided into two categories: flat end and U-shaped groove end; among them, the end types of the single-sided clamping plate and the double-sided clamping plate are determined according to the combination form of the clamping plate.

[0010] In the above-mentioned fixing device for the spiral tube of the heat exchanger,

[0011] When the combination of the pallets is a single-sided pallet + a single-sided pallet, the two single-sided pallets are respectively recorded as 1# single-sided pallet and 2# single-sided pallet, then: the end type of the 1# single-sided pallet is a flat end, and the end type of the 2# single-sided pallet is a U-shaped groove end; during assembly, the flat end of the 1# single-sided pallet is inserted into the U-shaped groove end of the 2# single-sided pallet and connected by bolts;

[0012] When the combination of pallets is single-sided pallet + double-sided pallet + single-sided pallet, the two single-sided pallets are respectively recorded as 3# single-sided pallet and 4# single-sided pallet, and the double-sided pallet is recorded as 1# double-sided pallet, then: the ends of 3# single-sided pallet and 4# single-sided pallet are both U-shaped groove ends, and the end of 1# double-sided pallet is a flat plate end; during assembly, the flat plate ends of 1# double-sided pallet are respectively inserted into the U-shaped groove ends of 3# single-sided pallet and 4# single-sided pallet, and connected by bolts;

[0013] When the combination of pallets is single-sided pallet + double-sided pallet + double-sided pallet + single-sided pallet, the two single-sided pallets are respectively recorded as 5# single-sided pallet and 6# single-sided pallet, and the two double-sided pallets are recorded as 2# double-sided pallet and 3# double-sided pallet, then: the end of 5# single-sided pallet is a U-shaped groove end, the end of 2# double-sided pallet is a flat plate end, the end of 3# double-sided pallet is a U-shaped groove end, and the end of 6# single-sided pallet is a flat plate end; during assembly, the flat plate ends of 2# double-sided pallet are respectively inserted into the U-shaped groove ends of 5# single-sided pallet and the U-shaped groove ends of 3# double-sided pallet, and are connected by bolts; the flat plate end of 6# single-sided pallet is inserted into the U-shaped groove end of 3# double-sided pallet, and are connected by bolts.

[0014] In the above-mentioned fixing device for the spiral tube of the heat exchanger, an oblong hole for connecting bolts is provided on the end of the clamping plate; wherein the setting principle of the oblong hole is as follows:

[0015] An oblong hole is provided on the end of the single-side card plate;

[0016] Two long elliptical holes are provided on the ends of the double-sided clamping plates;

[0017] The aperture of the oblong hole on the U-shaped groove end is larger than the aperture of the oblong hole on the flat plate end.

[0018] In the above-mentioned fixing device for the spiral tube of the heat exchanger, the clamping plate is connected to the connecting piece extending from the heat exchanger shell by bolts.

[0019] In the above-mentioned fixing device for the spiral tube of the heat exchanger, an oblong hole is provided on the connecting plate; wherein the direction of the oblong hole on the connecting plate is perpendicular to the oblong hole on the end of the clamping plate.

[0020] The present invention has the following advantages:

[0021] (1) The present invention discloses a fixing device for a spiral tube of a heat exchanger. The combined clamping plate has stronger applicability. Through different combinations of single-sided clamping plates and double-sided clamping plates, the fixing requirements of spiral tubes with different layers can be met, the movement of the spiral tubes can be constrained, and collisions between the spiral tubes and between the spiral tubes and the shell in a vibration environment can be prevented.

[0022] (2) The present invention discloses a fixing device for a spiral tube of a heat exchanger. The diameter of the arc-shaped groove on the clamping plate is larger than the outer diameter of the spiral tube, and the two grooves are transitioned by an arc, which not only meets the fixing requirements but also prevents the clamping plate from scratching and damaging the spiral tube.

[0023] (3) The present invention discloses a fixing device for a spiral tube of a heat exchanger. The long elliptical hole used for bolt connection takes into account the assembly error and the requirements of different assembly angles, avoiding the situation where the assembly is difficult due to the inability to align the mounting holes, and making the installation of the fixing clamp more flexible. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of a single-side card board in an embodiment of the present invention;

[0025] Figure 2 yes Figure 1 An enlarged schematic diagram of position A in the middle;

[0026] Figure 3 It is a structural schematic diagram of a double-sided card board in an embodiment of the present invention;

[0027] Figure 4 The figure is a schematic diagram of installing a fixing device of a spiral tube of a heat exchanger on a heat exchanger according to an embodiment of the present invention. DETAILED DESCRIPTION

[0028] In order to make the objectives, technical solutions and advantages of the present invention more clear, the embodiments disclosed in the present invention will be further described in detail below with reference to the accompanying drawings.

[0029] Reference Figures 1 to 3In this embodiment, the fixing device of the spiral tube of the heat exchanger is composed of a plurality of cardboards. The cardboards are divided into two categories: a single-side cardboard 1 and a double-side cardboard 2; the single-side cardboard 1 is a cardboard with a comb tooth structure 3 on one side of the long side, and the double-side cardboard 2 is a cardboard with a comb tooth structure 3 on both sides of the long side.

[0030] In this embodiment, the comb-tooth structure 3 is composed of a plurality of grooves 4 and arcs 5; wherein, the plurality of grooves 4 are evenly distributed on the side of the cardboard, and each two grooves are connected by an arc transition. The fixing device clamps the spiral tube 6 through the comb-tooth structure 3 to fix the spiral tube 6. It should be noted that the diameter of the groove 4 needs to be slightly larger than the outer diameter of the spiral tube 6.

[0031] In this embodiment, the fixing device of the spiral tube of the heat exchanger realizes the fixing of the spiral tube 6 by combining a single-side clamping plate 1 and a double-side clamping plate 2. The basic principle of the clamping plate combination is as follows: for multi-layer spiral tubes, a double-side clamping plate 2 is installed between every two spiral tubes, and a single-side clamping plate 1 is installed on the outer side of the outermost spiral tube and the outer side of the innermost spiral tube, respectively, so as to form a form in which two clamping plates are arranged inside and outside each layer of spiral tube to fix the multi-layer spiral tube.

[0032] In this embodiment, the terminal types of the cardboard are divided into two categories: flat terminal and U-shaped slot terminal. Among them, the thickness of the flat terminal is consistent with the thickness of the comb tooth structure 3, and the thickness of the U-shaped slot terminal is slightly greater than the thickness of the comb tooth structure 3. When the cardboard is installed, the flat terminal is inserted into the U-shaped slot terminal, and the two cardboards are connected by bolts. The terminal types of the single-sided cardboard 1 and the double-sided cardboard 2 can be determined according to the combination form of the cardboard.

[0033] For example:

[0034] When the combination of pallets is single-sided pallet + single-sided pallet, the two single-sided pallets are respectively recorded as 1# single-sided pallet and 2# single-sided pallet, then: the end type of 1# single-sided pallet is a flat end, and the end type of 2# single-sided pallet is a U-shaped groove end; during assembly, the flat end of 1# single-sided pallet is inserted into the U-shaped groove end of 2# single-sided pallet, and connected by bolt 7.

[0035] When the combination of pallets is single-sided pallet + double-sided pallet + single-sided pallet, the two single-sided pallets are respectively recorded as 3# single-sided pallet and 4# single-sided pallet, and the double-sided pallet is recorded as 1# double-sided pallet, then: the ends of 3# single-sided pallet and 4# single-sided pallet are both U-shaped groove ends, and the end of 1# double-sided pallet is a flat plate end; during assembly, the flat plate ends of 1# double-sided pallet are respectively inserted into the U-shaped groove ends of 3# single-sided pallet and 4# single-sided pallet, and connected by bolt 7.

[0036] When the combination of pallets is single-sided pallet + double-sided pallet + double-sided pallet + single-sided pallet, the two single-sided pallets are respectively recorded as 5# single-sided pallet and 6# single-sided pallet, and the two double-sided pallets are recorded as 2# double-sided pallet and 3# double-sided pallet, then: the end of 5# single-sided pallet is a U-shaped groove end, the end of 2# double-sided pallet is a flat plate end, the end of 3# double-sided pallet is a U-shaped groove end, and the end of 6# single-sided pallet is a flat plate end; during assembly, the flat plate ends of 2# double-sided pallet are respectively inserted into the U-shaped groove ends of 5# single-sided pallet and the U-shaped groove ends of 3# double-sided pallet, and are connected by bolts 7; the flat plate end of 6# single-sided pallet is inserted into the U-shaped groove end of 3# double-sided pallet, and are connected by bolts 7.

[0037] It should be noted that the above description of the types of card end heads is only an exemplary description and can be specifically set according to actual conditions, and this embodiment does not limit this.

[0038] In this embodiment, an oblong hole 8 for connecting a bolt 7 is provided on the end of the card plate. The oblong hole 8 is provided in the following principle: one oblong hole is provided on the end of the single-sided card plate 1; two oblong holes are provided on the end of the double-sided card plate 2; according to assembly requirements, the aperture of the oblong hole on the end of the U-shaped groove is larger than the aperture of the oblong hole on the flat plate end to allow a certain assembly error.

[0039] In this embodiment, if Figure 4 As shown, the card plate is connected to the connecting piece 10 extending from the heat exchanger housing 9 by bolts 7. Among them, an oblong hole is provided on the connecting piece 10. Since the spiral tube 6 has a certain helix angle, the height of the end of the card plate of fixed size is different at different angles. In order to ensure that the oblong hole of the end of the card plate at any angle in the circumferential direction can be aligned with the oblong hole of the connecting piece, the direction of the oblong hole on the connecting piece 10 is designed to be perpendicular to the oblong hole on the end of the card plate to meet the assembly requirements of different end heights.

[0040] Although the present invention has been disclosed as above in the form of a preferred embodiment, it is not intended to limit the present invention. Any person skilled in the art may make possible changes and modifications to the technical solution of the present invention by using the methods and technical contents disclosed above without departing from the spirit and scope of the present invention. Therefore, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention shall fall within the protection scope of the technical solution of the present invention.

[0041] The contents not described in detail in the specification of the present invention belong to the common knowledge of the professionals in this field.

Claims

1. A fixing device for a spiral tube of a heat exchanger, characterized in that: The fixing device of the spiral tube of the heat exchanger is composed of a plurality of clamping plates; wherein the clamping plates are divided into two categories: a single-sided clamping plate (1) and a double-sided clamping plate (2); the single-sided clamping plate (1) is a clamping plate with a comb tooth structure (3) provided on one side of the long side, and the double-sided clamping plate (2) is a clamping plate with a comb tooth structure (3) provided on both sides of the long side.

2. The fixing device for the spiral tube of the heat exchanger according to claim 1, characterized in that: The comb tooth structure (3) is composed of a plurality of grooves (4) and circular arcs (5); wherein the plurality of grooves (4) are evenly distributed on the side of the card plate, and every two grooves are connected by a circular arc transition.

3. The fixing device for the spiral tube of the heat exchanger according to claim 1, characterized in that: The fixing device of the spiral tube of the heat exchanger clamps the spiral tube (6) through the comb tooth structure (3) to fix the spiral tube (6).

4. The fixing device for the spiral tube of the heat exchanger according to claim 1, characterized in that: The device for fixing the spiral tube of the heat exchanger fixes the spiral tube (6) by combining a single-side clamping plate (1) and a double-side clamping plate (2).

5. The fixing device for the spiral tube of the heat exchanger according to claim 4, characterized in that: For the multi-layer spiral tube, a double-sided clamping plate (2) is installed between every two spiral tubes, and a single-sided clamping plate (1) is installed on the outer side of the outermost spiral tube and the outer side of the innermost spiral tube, respectively, so that two clamping plates are arranged inside and outside each layer of spiral tube to fix the multi-layer spiral tube.

6. The fixing device for the spiral tube of the heat exchanger according to claim 1, characterized in that: The end types of the cardboard are divided into two categories: flat end and U-shaped groove end; wherein the end types of the single-sided cardboard (1) and the double-sided cardboard (2) are determined according to the combination form of the cardboard.

7. The fixing device for the spiral tube of the heat exchanger according to claim 6, characterized in that: When the combination of the pallets is a single-sided pallet + a single-sided pallet, the two single-sided pallets are respectively recorded as a 1# single-sided pallet and a 2# single-sided pallet, and then: the end type of the 1# single-sided pallet is a flat end, and the end type of the 2# single-sided pallet is a U-shaped groove end; during assembly, the flat end of the 1# single-sided pallet is inserted into the U-shaped groove end of the 2# single-sided pallet and connected by bolts (7); When the combination of the pallets is a single-sided pallet + a double-sided pallet + a single-sided pallet, the two single-sided pallets are respectively recorded as 3# single-sided pallet and 4# single-sided pallet, and the double-sided pallet is recorded as 1# double-sided pallet, then: the ends of the 3# single-sided pallet and the 4# single-sided pallet are both U-shaped groove ends, and the end of the 1# double-sided pallet is a flat plate end; during assembly, the flat plate ends of the 1# double-sided pallet are respectively inserted into the U-shaped groove ends of the 3# single-sided pallet and the 4# single-sided pallet, and connected by bolts (7); When the combination of the pallets is a single-sided pallet + a double-sided pallet + a double-sided pallet, the two single-sided pallets are respectively recorded as 5# single-sided pallet and 6# single-sided pallet, and the two double-sided pallets are recorded as 2# double-sided pallet and 3# double-sided pallet. Then: the end of the 5# single-sided pallet is a U-shaped groove end, the end of the 2# double-sided pallet is a flat plate end, the end of the 3# double-sided pallet is a U-shaped groove end, and the end of the 6# single-sided pallet is a flat plate end; during assembly, the flat plate end of the 2# double-sided pallet is respectively inserted into the U-shaped groove end of the 5# single-sided pallet and the U-shaped groove end of the 3# double-sided pallet, and connected by bolts (7); the flat plate end of the 6# single-sided pallet is inserted into the U-shaped groove end of the 3# double-sided pallet, and connected by bolts (7).

8. The fixing device for the spiral tube of the heat exchanger according to claim 6, characterized in that: An oblong hole (8) for connecting a bolt (7) is provided on the end of the clamping plate; wherein the oblong hole (8) is provided in accordance with the following principles: An oblong hole is provided on the end of the single-side clamping plate (1); Two oblong holes are arranged at the ends of the double-sided clamping plates (2); The aperture of the oblong hole on the U-shaped groove end is larger than the aperture of the oblong hole on the flat plate end.

9. The fixing device for the spiral tube of the heat exchanger according to claim 8, characterized in that: The clamping plate is connected to a connecting piece (10) extending from a heat exchanger housing (9) via bolts (7).

10. The fixing device for the spiral tube of the heat exchanger according to claim 9, characterized in that: An oblong hole is provided on the connecting piece (10); wherein the direction of the oblong hole on the connecting piece (10) is perpendicular to the oblong hole on the end of the clamping plate.

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