Mixing chamber of star-type alternating-current arc heater
By designing a detachable star-type AC arc heater mixing chamber, the problems of high material cost and difficult maintenance of the existing mixing chamber are solved, and the effects of reducing test costs and extending service life are achieved.
Patent Information
- Application Number
- CN202323525845.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-22
- Publication Date
- 2025-01-21
- Estimated Expiration
- 2033-12-22
AI Technical Summary
The existing AC arc heater mixing chamber materials are costly and difficult to process, and once damaged, they are basically unable to repair, resulting in high test costs.
A star-type AC arc heater mixing chamber is designed. The first shell and the second shell are installed on the outside of the mixing chamber shell through sealed splicing, and are equipped with cooling channels to allow replacement and replacement of components.
A simple and easy-to-manufacture mixing chamber is achieved, which reduces maintenance and testing costs, and prevents high-temperature damage through cooling channels.
Smart Images
Figure CN222381825U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of AC electric arc heaters, in particular to a star-type AC electric arc heater mixing chamber. Background Art
[0002] AC arc heater is an important type of heater and can be used in aerospace arc heating test fields, such as Figure 1 As shown, it generally adopts a three-phase star structure, that is, three arc heater arms and contraction sections of the same structure are installed on the same mixing chamber to achieve stable operation of multiple arcs.
[0003] Existing mixing chambers are mostly processed with an integral structure of red copper, which has high material costs and is difficult to process. In addition, once serious damage occurs during use, it is basically impossible to repair and needs to be replaced as a whole, resulting in high test costs.
[0004] In view of the above reasons, the utility model proposes a star-type AC arc heater mixing chamber to solve the above technical problems. Utility Model Content
[0005] The utility model aims to provide a star-type AC arc heater mixing chamber, which can be easily processed and assembled, and components can be easily replaced after being damaged, thereby reducing the test cost.
[0006] The utility model provides a star-type AC arc heater mixing chamber, comprising: a mixing chamber inner shell, a first outer shell and a second outer shell, the first outer shell and the second outer shell are sealed and spliced and installed on the outside of the mixing chamber inner shell, a cooling channel is provided between the first outer shell, the second outer shell and the outer wall of the mixing chamber inner shell, a hollow cavity with openings at both ends is provided on the mixing chamber inner shell, the cross-sections of the first outer shell and the second outer shell are both polygonal, mounting holes are respectively provided on multiple splicing surfaces of the first outer shell and the second outer shell, an electrode arm inner shell is respectively installed in each mounting hole, and the electrode arm inner shell is provided with an inner cavity connected to the hollow cavity of the mixing chamber inner shell.
[0007] Preferably, the cross section of the hollow cavity of the mixing chamber inner shell is circular.
[0008] Preferably, the first shell and the second shell are symmetrically arranged about a perpendicular midline of an axis of the hollow cavity of the inner shell of the mixing chamber, and the first shell and the second shell have the same specifications.
[0009] Preferably, the outer contours of the cross sections of the first shell and the second shell are hexagonal, and the mounting holes are provided on three spaced-apart splicing surfaces after the first shell and the second shell are spliced.
[0010] Preferably, the axis of each mounting hole passes through the joint between the first outer shell and the second outer shell, and one end of the inner cavity of the electrode arm inner shell is connected to the middle of the hollow cavity of the mixing chamber inner shell.
[0011] Preferably, the first shell and the second shell are sealed and spliced by brazing.
[0012] Preferably, a plurality of water inlet nozzles and water return nozzles connected to the cooling channel are respectively arranged on the outer walls of the first shell and the second shell.
[0013] Preferably, the number of the water inlet nozzles and the water return nozzles is 3 to 6 respectively.
[0014] Preferably, the end surface of the inner shell of the electrode arm is fixedly connected to the outer walls of the first outer shell and the second outer shell by a plurality of bolts.
[0015] Preferably, a plurality of matching cooling water grooves are provided on the outer wall of the inner shell of the mixing chamber and the inner walls of the first outer shell and the second outer shell, and the plurality of cooling water grooves constitute the cooling channel.
[0016] Compared with the prior art, the technical solution of the utility model has the following beneficial effects:
[0017] 1. The first shell and the second shell in the utility model are detachably mounted on the outside of the inner shell of the mixing chamber after splicing. Compared with the existing copper integral processing method adopted by the mixing chamber, the utility model has a simple structure and is easy to manufacture. The first shell and the second shell can be replaced and substituted, which reduces the maintenance cost and the test cost;
[0018] 2. A plurality of mounting holes are arranged on the outer circumference of the first outer shell and the second outer shell, and an electrode arm inner shell connected with the inner shell of the mixing chamber is installed in the mounting holes. A variety of gases can be introduced into the hollow cavity through each electrode arm inner shell for mixing, and the mixed gas is heated by AC arc through the electrodes on the electrode arm inner shell. A cooling channel is arranged between the inner sides of the first outer shell and the second outer shell and the outer wall of the inner shell of the mixing chamber, and cooling water can flow to cool the inner shell of the mixing chamber to prevent it from being damaged due to excessive temperature. The heated mixed gas flows out from both ends of the inner shell of the mixing chamber. The device is convenient and safe to use. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0020] Figure 1 It is a schematic diagram of the structure of a star-type AC arc heater in the prior art;
[0021] Figure 2 It is a schematic diagram of the overall structure of the mixing chamber of the utility model;
[0022] Figure 3 The left view and the front view of the inner shell of the mixing chamber in the utility model;
[0023] Figure 4 It is a structural schematic diagram of the first shell and the second shell in the utility model;
[0024] Figure 5 It is a schematic diagram of the weld position of the mixing chamber in the utility model.
[0025] Description of reference numerals:
[0026] 1: mixing chamber inner shell; 21: first outer shell; 22: second outer shell; 3: electrode arm inner shell; 4: mounting hole; 5: weld; 6: water inlet nozzle; 7: water return nozzle; 8: threaded hole; 9: cooling water tank; 10: bolt; 11: sealing gasket. DETAILED DESCRIPTION
[0027] The technical solution of the utility model will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are 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.
[0028] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.
[0029] In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, "multiple" means two or more, unless otherwise clearly and specifically defined. In addition, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.
[0030] like Figure 2-5 As shown, the utility model proposes a star-type AC arc heater mixing chamber, comprising: a mixing chamber inner shell 1, a first shell 21 and a second shell 22, wherein the first shell 21 and the second shell 22 are both made of stainless steel, and the mixing chamber inner shell 1 is made of copper. The first shell 21 and the second shell 22 are sealed and spliced and installed on the outside of the mixing chamber inner shell 1. A sealed cooling channel is provided between the first shell 21, the second shell 22 and the outer wall of the mixing chamber inner shell 1. Cooling water or other coolant can flow in the cooling channel to cool the mixing chamber inner shell 1. A hollow cavity with openings at both ends is provided on the mixing chamber inner shell 1 along its axial direction, which serves as a heating container for the mixed gas. The cross-sectional outer contours of the first shell 21 and the second shell 22 are both polygonal, and the specifications of the two are the same. Mounting holes 4 are respectively provided at the middle parts of multiple splicing surfaces of the first shell 21 and the second shell 22, and electrode arm inner shells 3 are respectively installed in each mounting hole 4. The electrode arm inner shell 3 is provided with an inner cavity connected to the hollow cavity of the mixing chamber inner shell 1.
[0031] Specifically, the cross section of the hollow cavity of the mixing chamber inner shell 1 is circular, and multiple gases enter from the inner shells 3 of each electrode arm, are heated under the action of the AC arc, and are mixed in the middle of the mixing chamber inner shell 1. After mixing, they flow out from the two ends of the mixing chamber inner shell 1. The first shell 21 and the second shell 22 are symmetrically arranged about the perpendicular midline of the axis of the hollow cavity of the mixing chamber inner shell 1, and the specifications of the first shell 21 and the second shell 22 are the same. The first shell 21 and the second shell 22 are sealed and spliced by brazing, and the two ends of the mixing chamber inner shell 1 and the end faces of the first shell 21 and the second shell 22 are also connected by brazing. When the first shell 21 or the second shell 22 and other components are burned during use, the weld 5 can be cut open to repair and replace them. Compared with the original mixing chamber overall material processing, it is basically impossible to repair after serious damage, which greatly reduces the cost of experimental use.
[0032] In this embodiment, the outer contour of the cross section of the first shell 21 and the second shell 22 is a hexagon, and each mounting hole 4 is provided on three spaced joint surfaces after the first shell 21 and the second shell 22 are joined, and the area of the joint surface provided with the mounting hole 4 is larger than the area of the adjacent joint surfaces. The axis of each mounting hole 4 passes through the joint seam (i.e., the weld seam 5) of the first shell 21 and the second shell 22, and one end of the inner cavity of the electrode arm inner shell 3 is connected to the middle of the hollow cavity of the mixing chamber inner shell 1. After arc heating through the electrode arm inner shell 3, multiple gases are introduced into the middle of the hollow cavity of the mixing chamber inner shell 1 for mixing, and flow out from both ends of the hollow cavity after mixing.
[0033] A plurality of water inlet nozzles 6 and water return nozzles 7 connected to the cooling channel are respectively arranged on the outer walls of the first shell 21 and the second shell 22. The number of the water inlet nozzles 6 and the water return nozzles 7 are 3 to 6 respectively. The water inlet nozzles 6 are used to connect with the water inlet pipe, which is connected to the water source. The water return nozzles 7 can be connected to the return water tank through the water return pipe, and the circulating cooling water enters the cooling channel through the water inlet nozzles 6. In this embodiment, the number of the water inlet nozzles 6 and the water return nozzles 7 are both 6, 2 in a group, three groups of water inlet nozzles 6 are respectively arranged at the ends of the three joint surfaces of the first shell 21 adjacent to the mounting hole 4, and three groups of water return nozzles 7 are respectively arranged at the ends of the three joint surfaces of the second shell 22 adjacent to the mounting hole 4. The cooling water can flow into the cooling channel from the water inlet nozzles 6 and flow out from the water return nozzles 7, so as to cool the outer periphery of the inner shell 1 of the mixing chamber to prevent it from being damaged by the high-temperature mixed gas. One end of the water inlet pipe nozzle 6 and the water return pipe nozzle 7 is provided with an external thread on its outer periphery, which is threadedly connected to the threaded hole 8 provided on the surface of the first shell 21 or the second shell 22, and the ends of the water inlet pipe nozzle 6 and the water return pipe nozzle 7 are provided with sealing gaskets 11 to prevent water leakage during the water inlet and outlet process.
[0034] In this embodiment, a plurality of matching cooling water grooves 9 are provided on the outer wall of the mixing chamber inner shell 1 and the inner walls of the first outer shell 21 and the second outer shell 22. The plurality of cooling water grooves 9 constitute the above-mentioned cooling channel. A hollow structure is provided inside the first outer shell 21 and the second outer shell 22 and is connected to the cooling water grooves 9.
[0035] In this embodiment, the end face of the electrode arm inner shell 3 is fixedly connected to the outer walls of the first outer shell 21 and the second outer shell 22 by multiple bolts 10, and the bolt holes and the mounting holes 4 and the spaces connected to the cooling water tank 9 inside the first outer shell 21 and the second outer shell 22 are all isolated, which can prevent water leakage from the bolt holes.
[0036] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.
Claims
1. A star type AC arc heater mixing chamber, characterized in that: include: A mixing chamber inner shell, a first outer shell and a second outer shell, the first outer shell and the second outer shell are sealed and spliced and installed on the outside of the mixing chamber inner shell, a cooling channel is provided between the first outer shell, the second outer shell and the outer wall of the mixing chamber inner shell, a hollow cavity with openings at both ends is provided on the mixing chamber inner shell, the cross-sections of the first outer shell and the second outer shell are both polygonal, mounting holes are respectively provided on multiple splicing surfaces of the first outer shell and the second outer shell, an electrode arm inner shell is respectively installed in each mounting hole, and the electrode arm inner shell is provided with an inner cavity connected to the hollow cavity of the mixing chamber inner shell.
2. The star type AC arc heater mixing chamber according to claim 1, characterized in that: The cross section of the hollow cavity of the mixing chamber inner shell is circular.
3. The star type AC arc heater mixing chamber according to claim 1, characterized in that: The first shell and the second shell are symmetrically arranged with respect to a perpendicular midline of an axis of the hollow cavity of the inner shell of the mixing chamber, and the first shell and the second shell have the same specifications.
4. The star type AC arc heater mixing chamber according to claim 3, characterized in that: The outer contours of the cross sections of the first shell and the second shell are hexagonal, and the mounting holes are provided on three spaced-apart splicing surfaces after the first shell and the second shell are spliced.
5. The star type AC arc heater mixing chamber according to claim 4, characterized in that: The axis of each mounting hole passes through the joint between the first outer shell and the second outer shell, and one end of the inner cavity of the electrode arm inner shell is connected to the middle of the hollow cavity of the mixing chamber inner shell.
6. The star type AC arc heater mixing chamber according to claim 1, characterized in that: The first shell and the second shell are sealed and spliced by brazing.
7. The star type AC arc heater mixing chamber according to claim 1, characterized in that: A plurality of water inlet nozzles and water return nozzles connected to the cooling channel are respectively arranged on the outer walls of the first shell and the second shell.
8. The star type AC arc heater mixing chamber according to claim 7, characterized in that: The number of the water inlet nozzles and the water return nozzles is 3 to 6 respectively.
9. The star type AC arc heater mixing chamber according to claim 1, characterized in that: The end surface of the inner shell of the electrode arm is fixedly connected to the outer walls of the first outer shell and the second outer shell through a plurality of bolts.
10. The star type AC arc heater mixing chamber according to claim 1, characterized in that: A plurality of matching cooling water grooves are provided on the outer wall of the inner shell of the mixing chamber and the inner walls of the first shell and the second shell, and the plurality of cooling water grooves constitute the cooling channel.