Electrode locking device of electric arc heater

Abstract

The utility model discloses an electrode locking device of an arc heater, which is characterized in that an electrode and an electrode support are connected into a whole through a bolt, an electrode base is of an inverted U-shaped structure, the electrode base is fixed with the electrode support through a bolt in the horizontal direction, a sliding block is arranged between the electrode base and guide rails, and the two guide rails are erected on a guide rail support in parallel. The round rim hand wheel is connected to the tail end of the lead screw through a pin, the flange cap is installed at the top end of the lead screw, and the lead screw transversely penetrates through the vertical face of the electrode base in a threaded fit mode. Before and after an arc heater test, a heater electrode needs to be pulled open so as to replace an arc striking wire, overhaul a sealing ring and clean impurities or arc spots generated by burning explosion of the arc striking wire in the electrode. And after the electrode is pulled open and a proper distance is kept, the lead screw is pushed towards the guide rail bracket by rotating the round wheel flange handle until the flange cap abuts against the outer side end surface of the guide rail bracket, so that the double-side locking of the electrode on the guide rail bracket is realized, and the aims of improving the test efficiency and guaranteeing the safety of personnel and equipment are fulfilled.

Description

Technical Field

[0001] The utility model relates to an arc heater electrode locking device, belonging to the field of aerospace aircraft aerodynamic thermal ground simulation test. Background Art

[0002] my country's thermal protection aerodynamic heating test equipment mainly uses arc heaters to provide high-temperature gas, and has developed multiple types of high-power arc heaters, such as tubular arc heaters, long-segmented arc heaters, and laminated arc heaters. With the iteration and update of my country's hypersonic aircraft models, the test tasks have increased significantly, and the replacement and maintenance efficiency of equipment needs to be further improved.

[0003] Before and after the arc heater test, the heater electrodes need to be pulled apart to replace the arc-starting wire, inspect the sealing ring, and clean the impurities or arc spots in the electrode caused by the explosion of the arc-starting wire. At present, for the fixation of the rear electrode after it is pulled apart, a manual push-and-pull method is usually adopted to control the relative position of the electrode on the guide rail bracket, but this method is time-consuming and labor-intensive, and requires the cooperation of multiple people. With the construction and application of high-power and large-size arc heater equipment, this method of manual fixation is no longer applicable, and there are major safety hazards. The utility model discloses an arc heater electrode locking device that can be operated by a single person to achieve mechanical locking and position limitation of the electrode. It is a mature and effective heater electrode locking method. Utility Model Content

[0004] The technical problem to be solved by the utility model is to solve the problem that the pulled apart electrodes are difficult to lock on the guide rails before and after the arc heater test, provide a mature and effective heater electrode locking method, improve the test efficiency, and ensure the safety of personnel and equipment.

[0005] The technical solution of the utility model is: an arc heater electrode locking device, comprising: an electrode, an electrode support, an electrode base, a slider, a guide rail, a guide rail bracket, a round wheel rim hand wheel, a lead screw, and a flange cap, wherein:

[0006] The electrode is connected to the electrode support as a whole through fasteners, and the electrode base is an inverted U-shaped structure; the electrode support is fixedly installed on the U-shaped bottom surface of the electrode base, and two guide rails are arranged in parallel on the guide rail bracket. The slider is placed between the electrode base and the guide rail. The lead screw crosses the U-shaped side of the electrode base through threaded cooperation. A flange cap is installed on the top of the lead screw and a hand wheel is installed on the end. Before and after the arc heater test, the heater electrodes need to be pulled apart. After the electrodes are pulled apart and maintained at an appropriate distance, the hand wheel is rotated to advance the lead screw in the direction of the guide rail bracket until the flange cap hits the outer end face of the guide rail bracket, thereby realizing double-sided locking of the electrode on the guide rail bracket.

[0007] Preferably, the electrode and the electrode support, and the electrode support and the electrode base are connected by quenched bolts, and locking nuts are used for triangular fixation;

[0008] Preferably, the distance L between the U-shaped side surface of the electrode base and the vertical side end surface of the guide rail bracket is between 80 and 150 mm.

[0009] Preferably, in the guide rail bracket, the thickness T of the vertical side end beam of the bracket is not less than 20 mm, and the height H is not less than 50 mm.

[0010] Preferably, the handwheel is a round rim handwheel, the material used is bakelite, and a small rotating handle is installed on the outside of the round rim handwheel.

[0011] Preferably, the connecting pin type between the round rim handwheel and the lead screw is a groove pin.

[0012] Preferably, the lead screw needs to be quenched, has a diameter of not less than 16 mm, a length between 100 and 200 mm, and a top end thereof is connected to the flange cap by a ball head.

[0013] Preferably, the height of the flange cap is not less than 20 mm, and the diameter of the bottom surface in contact with the guide rail bracket is not less than 32 mm.

[0014] Preferably, the inner core material of the flange cap is 20# steel, and the entire body is wrapped with anti-slip rubber.

[0015] Beneficial effects of the utility model:

[0016] 1. The utility model solves the problem of locking the electrode at the specified position of the guide rail. The mechanical locking method replaces the manual pushing and pulling of the electrode, and the electrode locking position can be freely limited, which facilitates the replacement of the arc-starting wire, improves the test efficiency, and also ensures the safety of the equipment and maintenance personnel.

[0017] 2. The application of the utility model can realize single-person operation, save manpower input, and reduce test costs.

[0018] 3. The utility model is easy to install, the use steps are concise and clear, and it is highly practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the arc heater electrode locking device;

[0020] Numbers in the figure: 1-electrode; 2-electrode support; 3-electrode base; 4-slider;

[0021] 5-guide rail; 6-guide rail bracket; 7-round wheel rim handwheel; 8-screw;

[0022] 9- flange cap; DETAILED DESCRIPTION

[0023] The utility model is further described in detail below in conjunction with the accompanying drawings and specific implementations.

[0024] The utility model provides an arc heater electrode locking device, such as Figure 1 As shown, it includes an electrode 1, an electrode support 2, an electrode base 3, a slider 4, a guide rail 5, a guide rail bracket 6, a round wheel flange handwheel 7, a lead screw 8, and a flange cap 9;

[0025] The electrode 1 is connected to the electrode support 2 by bolts to form a whole. The electrode base 3 is an inverted U-shaped structure. The electrode base 3 is fixed to the electrode support 2 by bolts in the horizontal direction. The slider 4 is placed between the electrode base 3 and the guide rail 5. The two guide rails 5 are parallelly mounted on the guide rail bracket 6. The round wheel rim handwheel 7 is connected to the end of the lead screw 8 by a pin. The flange cap 9 is installed on the top of the lead screw 8. The lead screw 8 crosses the vertical surface of the electrode base 3 by threaded matching. Before and after the arc heater test, the heater electrode 1 needs to be pulled apart to replace the arc-starting wire, inspect the sealing ring, and clean the impurities or arc spots in the electrode caused by the explosion of the arc-starting wire. After the electrode 1 is pulled apart and kept at an appropriate distance, the lead screw 8 is pushed toward the guide rail bracket 6 by rotating the round wheel rim handwheel 7 until the flange cap 9 presses against the outer end face of the guide rail bracket 6 to achieve double-sided locking of the electrode 1 on the guide rail bracket 6.

[0026] In the preferred embodiment of the present invention, the electrode 1 and the electrode support 2, and the electrode support 2 and the electrode base 3 are connected by quenched bolts to prevent excessive shear force from damaging the bolt connection;

[0027] In the preferred embodiment of the present invention, the electrode support 2 and the electrode base 3 are fixed in a triangle shape by a locking nut to ensure the connection stability and prevent the bolts from loosening due to vibration;

[0028] In the preferred embodiment of the present invention, the electrode base 3 is an inverted U-shaped structure, and the vertical distance L between the electrode base 3 and the vertical side end surface of the guide rail bracket 6 is between 80 and 150 mm, which provides a suitable space for the movement of the flange cap 9 and ensures the stability of the U-shaped structure.

[0029] In the preferred embodiment of the utility model, the beam thickness T of the guide rail bracket 6 is not less than 20 mm to fully ensure the strength and rigidity of the bracket, and the beam height H is not less than 50 mm to ensure that the flange cap 9 has sufficient contact area with the side end surface of the guide rail bracket 6 to ensure locking stability;

[0030] In the preferred embodiment of the utility model, the round wheel rim hand wheel 7 is made of bakelite, which is a thermosetting plastic and will not soften or melt. It is hard and wear-resistant, low in cost, and has insulation, flame retardancy, corrosion resistance and arc resistance.

[0031] In the preferred embodiment of the utility model, the circular wheel rim hand wheel 7 and the screw rod 8 are connected by a groove pin, which is not easy to loosen and can withstand vibration and variable load. Secondly, the pin hole does not need to be hinged and can be disassembled and used multiple times;

[0032] In the preferred embodiment of the present invention, the diameter of the lead screw 8 is not less than 16 mm, and a quenching process is adopted to improve the bearing strength of the thread and the root;

[0033] In the preferred embodiment of the present invention, the flange cap 9 is connected to the top of the lead screw 8 by a ball head, which is more flexible and changeable than a fixed connection;

[0034] In the preferred embodiment of the present invention, the flange cap 9 is wrapped with anti-slip rubber, and the bottom surface in contact with the guide rail bracket 6 has a diameter of not less than 32 mm, which increases the sliding friction and improves the reliability of electrode locking;

[0035] The utility model can be applied to arc heaters in pneumatic thermal protection ground simulation tests, and its component device, locking method and test verification have all proved the characteristics of the utility model. The undisclosed technology of the utility model is common knowledge to those skilled in the art.

Claims

1. An arc heater electrode locking device, characterized in that include: Electrode (1), electrode support (2), electrode base (3), slide block (4), guide rail (5), guide rail bracket (6), round wheel flange hand wheel (7), lead screw (8), flange cap (9), wherein: The electrode (1) is connected to the electrode support (2) via a fastener to form an integral body, and the electrode base is an inverted U-shaped structure; the electrode support is fixedly mounted on the U-shaped bottom surface of the electrode base, two guide rails (5) are parallelly mounted on the guide rail bracket (6), a slider (4) is placed between the electrode base (3) and the guide rail (5), a lead screw (8) crosses the U-shaped side surface of the electrode base (3) via a threaded fit, a flange cap is mounted on the top of the lead screw, and a hand wheel is mounted on the end thereof. Before and after the arc heater test, the heater electrode (1) needs to be pulled apart, and after the electrode (1) is pulled apart and maintained at an appropriate distance, the hand wheel (7) is rotated to push the lead screw (8) in the direction of the guide rail bracket (6) until the flange cap (9) presses against the outer end surface of the guide rail bracket (6), thereby achieving double-sided locking of the electrode (1) on the guide rail bracket (6).

2. The arc heater electrode locking device according to claim 1, characterized in that: The electrode (1) and the electrode support (2), and the electrode support (2) and the electrode base (3) are connected respectively by using quenched bolts, and locking nuts are required for triangular fixation.

3. The arc heater electrode locking device according to claim 1, characterized in that: The distance L between the U-shaped side surface of the electrode base (3) and the vertical side end surface of the guide rail bracket (6) is between 80 and 150 mm.

4. The arc heater electrode locking device according to claim 1, characterized in that: The guide rail bracket (6) has a vertical side end face beam thickness T of not less than 20 mm and a height H of not less than 50 mm.

5. The arc heater electrode locking device according to claim 1, characterized in that: The hand wheel (7) is a round wheel rim hand wheel made of bakelite, and a small rotating handle is installed outside the round wheel rim hand wheel.

6. An arc heater electrode locking device according to claim 5, characterized in that: The connecting pin type of the circular wheel rim hand wheel (7) and the lead screw (8) is a groove pin.

7. The arc heater electrode locking device according to claim 1, characterized in that: The lead screw (8) needs to be quenched, has a diameter of not less than 16 mm, a length of 100 to 200 mm, and a top end thereof is connected to the flange cap (9) by a ball head.

8. The arc heater electrode locking device according to claim 1, characterized in that: The height of the flange cap (9) is not less than 20 mm, and the diameter of the bottom surface thereof in contact with the guide rail bracket (6) is not less than 32 mm.

9. The arc heater electrode locking device according to claim 1, characterized in that: The inner core material of the flange cap is 20# steel, and the whole body is wrapped with anti-slip rubber.

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