Platinum-ruthenium alloy doped graphene electrode material, preparation method, application and ignition device

Abstract

The invention discloses a platinum-ruthenium alloy doped graphene electrode material and a preparation method and application thereof and an ignition device, and relates to the technical field of electrode materials.The electrode material comprises platinum powder, ruthenium powder and graphene powder.The platinum powder, the ruthenium powder and the graphene powder are taken according to the weight ratio, mixed to be uniform and then pressed into an ingot blank, and the ingot blank is prepared; and sintering the ingot blank at high temperature to prepare a blank of the electrode material which can be used for preparing an electrode. According to the invention, the graphene is doped in the platinum-ruthenium alloy, so that the conductivity of the electrode material is improved; inorganic carbon is used as a third phase for doping, crystal barrier can be formed, a plurality of independent ignition areas are formed, only partial areas are needed for participation during ignition each time, and the service life of the electrode is prolonged; a trace amount of graphene can be attached to a grain boundary, and when a melting surface is cooled, grain growth can be prevented, grains are refined, and the electrode performance is enhanced.

Description

Technical Field

[0001] The invention relates to the technical field of electrode materials, in particular to a platinum-ruthenium alloy-doped graphene electrode material and a preparation method, application and ignition device thereof. Background Art

[0002] When a traditional platinum-ruthenium alloy electrode is powered on for ignition, the entire electrode is usually used as the ignition area, which leads to frequent use of the entire electrode and limits the service life of the electrode. On the other hand, after the ignition is completed, the igniter often lacks effective protection for the electrode. The electrode is still exposed to the flame for a long time after ignition, which also limits the service life of the electrode. Summary of the invention

[0003] In order to solve the problems existing in the prior art, the present invention provides a platinum-ruthenium alloy-doped graphene electrode material and its preparation method, application and ignition device. The electrode material is doped with graphene in the platinum-ruthenium alloy to improve the conductivity of the electrode material; inorganic carbon is doped as the third phase to form a crystal barrier and form a number of independent ignition areas. Each time the ignition is performed, only part of the area needs to participate, thereby extending the service life of the electrode.

[0004] The technical solution adopted by the present invention is:

[0005] A platinum-ruthenium alloy doped graphene electrode material is made from the following raw materials: platinum powder, ruthenium powder and graphene powder.

[0006] Preferably, the platinum content in the platinum powder is more than 99.99wt%, the ruthenium content in the ruthenium powder is more than 99.99wt%, and the particle size of the graphene powder is 50nm to 500nm.

[0007] Preferably, the weight of ruthenium powder in the raw material accounts for 5% to 30%, the weight of graphene powder accounts for 0.05% to 0.5%, and the rest is platinum powder.

[0008] A method for preparing a platinum-ruthenium alloy-doped graphene electrode material comprises the following steps:

[0009] Raw materials including platinum powder, ruthenium powder and graphene powder are mixed evenly according to weight ratio and pressed into ingots, which are then sintered at high temperature to form electrode material blanks; the platinum content in the platinum powder is more than 99.99wt%, the ruthenium content in the ruthenium powder is more than 99.99wt%, the particle size of the graphene powder is 50nm~500nm, the weight of ruthenium powder in the raw materials accounts for 5%~30%, the weight of graphene powder accounts for 0.05%~0.5%, and the rest is platinum powder.

[0010] Preferably, platinum powder, ruthenium powder and graphene powder are mixed evenly and then ground by a ball mill to obtain a mixed powder, or they are ground separately and then mixed evenly to obtain a mixed powder, and the mixed powder is made into an ingot.

[0011] Preferably, the mixed powder is filled into a pressing die and pressed into an ingot with a diameter of 45 mm using a hydraulic press, or pressed into an ingot with a diameter of 12 mm using an isostatic press.

[0012] Preferably, an ingot with a diameter of 45 mm is sintered at high temperature and then heated to 1500 degrees in a heating furnace and then extruded into a billet of electrode material with a diameter of 10 mm using an extruder; an ingot with a diameter of 12 mm is electron beam zone melted into a billet of electrode material with a diameter of 10 mm. During electron beam zone melting, the filament current is 45 A and the high voltage power is 1 kW.

[0013] An application of a platinum-ruthenium alloy doped graphene electrode material, using the platinum-ruthenium alloy doped graphene electrode material prepared by the preparation method to prepare an electrode.

[0014] An ignition device comprises a combustion chamber and an electrode arranged in the combustion chamber, wherein the electrode is prepared from a platinum-ruthenium alloy doped graphene electrode material prepared by the above-mentioned preparation method; a driving mechanism and a protective mechanism cooperating with the electrode are arranged in the combustion chamber; the driving mechanism comprises a motor and a screw pair, the output shaft of the motor is connected to the screw, and the electrode is arranged on the nut; the protective mechanism comprises a telescopic component and a protective component, the telescopic component comprises an outer cylinder and an inner cylinder, the outer cylinder is arranged on the nut, the inner cylinder is slidably arranged in a hollow cavity of the outer cylinder, a spring is arranged between the inner cylinder and the outer cylinder, the electrode is arranged in the hollow cavity of the inner cylinder and at least the discharge end of the electrode is exposed to the inner cylinder, the protective component comprises a protective door, the protective door is used to separate the combustion chamber into a main combustion chamber and an electrode chamber, the electrode is located in the electrode chamber and can be driven by the driving mechanism into the main combustion chamber for ignition after the protective door is opened, and the protective door is also used to prevent the electrode from entering the main combustion chamber when the driving mechanism is abnormally started.

[0015] Preferably, one side of the protective door is rotatably connected to the inner wall of the combustion chamber, and a driving ring is also rotatably connected at a position in the combustion chamber corresponding to the protective door, and a driving rod is rotatably connected between the driving ring and the other side of the protective door, and the outer circumferential surface of the driving ring is evenly distributed with helical teeth, and the outer side of the driving ring is meshed with a helical gear rotatably connected to the inner wall of the combustion chamber through the helical teeth, and the helical gear is coaxially connected with a spur gear, and a rack meshing with the spur gear is slidably connected to the inner wall of the combustion chamber, and paddles are respectively provided on both sides of one end of the rack, one of which extends out of the combustion chamber, and the other is located in the combustion chamber, A sliding sleeve is provided on one side of the nut, and a sliding rod is slidably connected inside the sliding sleeve. One end of the sliding rod is detachably abutted against the paddle. An elastic member is provided between the sliding rod and the sliding sleeve, and the elastic member enables the sliding rod to maintain a tendency to move along the sliding sleeve in a direction away from the paddle. A sliding groove cooperating with the other end of the sliding rod is provided on the inner wall of the combustion chamber, and the end of the sliding groove away from the main combustion chamber gradually moves away from the sliding rod along the direction from the main combustion chamber to the electrode chamber. A baffle is hinged on one end of the sliding rod close to the paddle, and a limiting plate cooperating with the baffle is provided on one end of the sliding rod close to the paddle and on the side of the baffle facing the main combustion chamber, and a torsion spring is provided between the baffle and the sliding rod.

[0016] The beneficial effects of the present invention are:

[0017] Doping graphene into platinum-ruthenium alloy improves the conductivity of the electrode material; inorganic carbon as the third phase doping can form crystal barriers and form several independent ignition areas. Each time ignition occurs, only part of the area needs to participate, thus extending the service life of the electrode. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the external structure of the ignition device in an embodiment of the present invention;

[0019] Figure 2 Schematic diagram of the internal structure of the ignition device in the embodiment of the present invention;

[0020] Figure 3 Schematic diagram of the structure of the ignition device along the axial longitudinal section of the electrode in the embodiment of the present invention;

[0021] Figure 4 for Figure 3 A schematic diagram of the enlarged structure of the local A in the middle;

[0022] Figure 5 It is a structural schematic diagram of an axial longitudinal section of the slide rod in the ignition device in an embodiment of the present invention;

[0023] Figure 6 for Figure 5 A schematic diagram of the enlarged structure of the local B in the middle;

[0024] Marking instructions: 1. Combustion chamber, 2. Electrode, 3. Motor, 4. Lead screw, 5. Nut, 6. Outer cylinder, 7. Inner cylinder, 8. Elastic part, 9. Protective door, 10. Drive ring, 11. Drive rod, 12. Bevel gear, 13. Spur gear, 14. Rack, 15. Paddle, 16. Slide sleeve, 17. Slide rod, 18. Slide groove, 19. Baffle, 20. Limiting plate, 21. Torsion spring, 22. Protective cover, 23. Installation part. DETAILED DESCRIPTION

[0025] The present invention is described in detail below with reference to the embodiments.

[0026] Example 1

[0027] When a traditional platinum-ruthenium alloy electrode is powered on and ignited, the entire electrode is usually used as the ignition area, which leads to frequent use as a whole and limits the service life of the electrode. To solve this technical problem, the idea of ​​the present invention is to form a crystal barrier on the electrode, and change the original entire electrode as a whole ignition area to form several small independent ignition areas through crystal barriers, so that each time the ignition is started, only part of the independent ignition area is required to participate, thereby extending the service life of the electrode. Specifically, this embodiment provides a platinum-ruthenium alloy doped graphene electrode material, which is made of the following raw materials: platinum powder, ruthenium powder and graphene powder.

[0028] The platinum content in the platinum powder is more than 99.99wt%, the ruthenium content in the ruthenium powder is more than 99.99wt%, and the particle size of the graphene powder is 50nm.

[0029] The weight of ruthenium powder in the raw materials accounts for 5%, the weight of graphene powder accounts for 0.05%, and the rest is platinum powder.

[0030] By doping graphene into the platinum-ruthenium alloy, the conductivity of the electrode material is improved; inorganic carbon as the third phase doping can form a crystal barrier, thereby changing the original entire electrode as a whole ignition area to form several small independent ignition areas through crystal barriers, so that each time the ignition is performed, only part of the independent ignition area needs to participate, thereby extending the service life of the electrode.

[0031] Example 2

[0032] When a traditional platinum-ruthenium alloy electrode is powered on and ignited, the entire electrode is usually used as the ignition area, which leads to frequent use as a whole and limits the service life of the electrode. To solve this technical problem, the idea of ​​the present invention is to form a crystal barrier on the electrode, and change the original entire electrode as a whole ignition area to form several small independent ignition areas through crystal barriers, so that each time the ignition is started, only part of the independent ignition area is required to participate, thereby extending the service life of the electrode. Specifically, this embodiment provides a platinum-ruthenium alloy doped graphene electrode material, which is made of the following raw materials: platinum powder, ruthenium powder and graphene powder.

[0033] The platinum content in the platinum powder is more than 99.99wt%, the ruthenium content in the ruthenium powder is more than 99.99wt%, and the particle size of the graphene powder is 200nm.

[0034] Preferably, the weight of ruthenium powder in the raw material accounts for 20%, the weight of graphene powder accounts for 0.3%, and the rest is platinum powder.

[0035] By doping graphene into the platinum-ruthenium alloy to form a crystal barrier, the original entire electrode as a whole ignition area is changed to form several small ignition areas through crystal barriers. During each ignition, only some independent ignition areas need to participate, thereby extending the service life of the electrode.

[0036] Example 3

[0037] When a traditional platinum-ruthenium alloy electrode is powered on and ignited, the entire electrode is usually used as the ignition area, which leads to frequent use as a whole and limits the service life of the electrode. To solve this technical problem, the idea of ​​the present invention is to form a crystal barrier on the electrode, and change the original entire electrode as a whole ignition area to form several small ignition areas through crystal barriers, so that each time the ignition is started, only some independent ignition areas need to participate, thereby extending the service life of the electrode. Specifically, this embodiment provides a platinum-ruthenium alloy doped graphene electrode material, which is made of the following raw materials: platinum powder, ruthenium powder and graphene powder.

[0038] The platinum content in the platinum powder is more than 99.99wt%, the ruthenium content in the ruthenium powder is more than 99.99wt%, and the particle size of the graphene powder is 500nm.

[0039] The weight of ruthenium powder in the raw materials accounts for 30%, the weight of graphene powder accounts for 0.5%, and the rest is platinum powder.

[0040] By doping graphene into the platinum-ruthenium alloy, the conductivity of the electrode material is improved; inorganic carbon as the third phase doping can form a crystal barrier, thereby changing the original entire electrode as a whole ignition area to form several small independent ignition areas through crystal barriers, so that each time the ignition is performed, only part of the independent ignition area needs to participate, thereby extending the service life of the electrode.

[0041] Example 4

[0042] A method for preparing a platinum-ruthenium alloy-doped graphene electrode material comprises the following steps:

[0043] Platinum powder, ruthenium powder and graphene powder are mixed in the weight ratio of any one of Examples 1 to 3, and then ground by a ball mill to obtain a mixed powder, or ground separately and then mixed to obtain a mixed powder. The mixed powder is filled into a pressing mold, and pressed into an ingot with a diameter of 45 mm by a hydraulic press. After the ingot is sintered at high temperature, it is heated to 1500 degrees in a heating furnace and extruded into a billet of electrode material with a diameter of 10 mm by an extruder.

[0044] Example 5

[0045] A method for preparing a platinum-ruthenium alloy-doped graphene electrode material comprises the following steps:

[0046] Platinum powder, ruthenium powder and graphene powder are mixed in a weight ratio according to any one of Examples 1 to 3, and then ground by a ball mill to obtain a mixed powder, or ground separately and then mixed to obtain a mixed powder. The mixed powder is filled into a pressing mold, and pressed into an ingot with a diameter of 12 mm by an isostatic press. The ingot is electron beam zone melted to produce a blank of electrode material with a diameter of 10 mm. During electron beam zone melting, the filament current is 45 A and the high voltage power is 1 kW.

[0047] The electrode material blank prepared by any one of Examples 4 and 5 is used, and the conductivity of the electrode material is improved by doping graphene in the platinum-ruthenium alloy; inorganic carbon is doped as the third phase to form a crystal barrier, thereby changing the original entire electrode as a whole ignition area to form several small independent ignition areas through crystal barriers, so that only part of the independent ignition area is required to participate in each ignition, thereby extending the service life of the electrode. In addition, during the preparation process, a trace amount of graphene can be attached to the grain boundary, which can prevent grain growth when the melt surface cools, refine the grains, and enhance the electrode performance.

[0048] Example 6

[0049] An application of a platinum-ruthenium alloy-doped graphene electrode material, using the blank of the electrode material prepared in any one of Examples 4 and 5 to make an electrode.

[0050] The electrode is made of the blank of the electrode material prepared in any one of Examples 4 and 5. Compared with the electrode prepared from the traditional material, the conductivity of the electrode material is improved due to the addition of graphene in the platinum-ruthenium alloy; inorganic carbon is doped as the third phase to form a crystal barrier, thereby changing the original entire electrode as a whole ignition area to form several small independent ignition areas through crystal barriers, so that only part of the independent ignition area is required to participate each time ignition, thereby extending the service life of the electrode. It is also important that during the preparation process, a trace amount of graphene can be attached to the grain boundary, which can prevent grain growth when the melt surface cools, refine the grains, and enhance the electrode performance.

[0051] Example 7

[0052] As one of the core components of the ignition device, the electrode is placed in the gas, and high voltage electricity is used to generate electric sparks between the electrodes to release a certain amount of energy to ignite the gas. However, in the currently commonly used ignition devices, the electrodes are still in the flame for a long time after ignition, which has a great impact on the service life of the electrodes, and the electrodes exposed for a long time are very prone to damage. In order to avoid the aforementioned problems, the present embodiment provides an ignition device, including a combustion chamber 1 and an electrode 2 arranged in the combustion chamber 1, wherein the electrode 2 is made of a blank of the electrode material prepared in any one of Examples 4 and 5; a driving mechanism and a protective mechanism cooperating with the electrode 2 are arranged in the combustion chamber 1; the driving mechanism includes a motor 3 and a pair of screws 4, the output shaft of the motor 3 is connected to the screw 4, and the electrode 2 is arranged on the nut 5; the protective mechanism includes a telescopic assembly and a protective assembly, and the telescopic assembly includes an outer cylinder 6 and an inner cylinder 7, and the outer cylinder 6 Arranged on the nut 5, the inner cylinder 7 is slidably arranged in the hollow cavity of the outer cylinder 6, an elastic member 8 is arranged between the inner cylinder 7 and the outer cylinder 6, the electrode 2 is arranged in the hollow cavity of the inner cylinder 7 and at least the discharge end of the electrode 2 is exposed to the inner cylinder 7, the protection component includes a protection door 9, the protection door 9 is used to separate the combustion chamber 1 into a main combustion chamber and an electrode chamber, the electrode 2 is located in the electrode chamber and can be driven by the driving mechanism to enter the main combustion chamber for ignition after the protection door 9 is opened, and the protection door 9 is also used to prevent the electrode 2 from entering the main combustion chamber when the driving mechanism is abnormally started.

[0053] When the electrode 2 is needed for ignition, the protective door 9 can be opened first, the motor 3 is started to drive the lead screw 4, and the electrode 2, driven by the nut 5, enters the main combustion chamber from the electrode chamber through the protective door 9, and then the electrode 2 is powered on to ignite the combustible gas input into the main combustion chamber. Among them, the ignition of the electrode 2 and the gas transportation are both mature existing technologies in this field, and no unnecessary elaboration is made here, and the improvement point of the present invention is not here, and the transportation and movement of the electrode 2 will not change the working principle of its ignition. The focus of this embodiment is that the electrode 2 is driven by the driving mechanism to achieve the mobility of the electrode 2. When ignition is required, the electrode 2 is moved to the main combustion chamber. After the ignition is completed, the electrode 2 can be moved back to the electrode chamber, and the protective door 9 is closed to isolate the electrode 2 from the flame, protect the electrode 2 and extend its service life.

[0054] In order to avoid the driving mechanism being mistakenly started when the protective door 9 is not opened, resulting in a collision between the electrode 2 and the protective door 9 and causing damage, a telescopic assembly is further arranged between the electrode 2 and the nut 5 in this embodiment. Specifically, the telescopic assembly consists of an outer cylinder 6 and an inner cylinder 7. The outer cylinder 6 is arranged on the nut 5, and the inner cylinder 7 is slidably connected to the hollow cavity of the outer cylinder 6. The outer cylinder 6 is arranged along the moving direction of the nut 5 and is at least opened on one side of the main combustion chamber. One end of the inner cylinder 7 is exposed through the opening of the outer cylinder 6. An outer limiting portion extending inwardly can be arranged on the inner side of the opening of the outer cylinder 6. The inner diameter of the limiting portion matches the outer diameter of the inner cylinder 7. An inner limiting portion extending outwardly can be arranged on the outer side of one end of the inner cylinder 7 located in the outer cylinder 6. The outer diameter of the inner limiting portion is larger than the inner diameter of the outer limiting portion. Then, an elastic member 8 is connected between the opposite sides of the outer limiting portion and the inner limiting portion for buffering. The elastic member 8 can be a spring. The end of the inner cylinder 7 away from the outer cylinder 6 also has an opening to facilitate the installation of the electrode 2 in the hollow cavity of the inner cylinder 7. When the protection door 9 is not opened, if the driving mechanism is started, the electrode 2 will be blocked by the protection door 9 after contacting the protection door 9, and the elastic member 8 is compressed at this time to prevent the ignition end of the electrode 2 from being damaged by excessive force. Of course, in order to further protect the electrode 2, a protective sleeve 22 corresponding to the electrode 2 can be provided on the protection door 9, and the length of the protective sleeve 22 is greater than the length of the portion of the electrode 2 exposed outside the inner tube 7. When the protection door 9 is not opened, if the driving mechanism is started, the electrode 2 enters the protective sleeve 22, and the protective sleeve 22 contacts the opening edge of the inner tube 7, abuts against the inner tube 7, thereby compressing the elastic member 8 to protect the electrode 2, and prevent the electrode 2 from directly contacting the protection door 9.

[0055] One side of the protective door 9 is rotatably connected to the inner wall of the combustion chamber 1, and a driving ring 10 is also rotatably connected at a position in the combustion chamber 1 corresponding to the protective door 9. A driving rod 11 is rotatably connected between the driving ring 10 and the other side of the protective door 9. The outer circumferential surface of the driving ring 10 is evenly distributed with helical teeth. The outer side of the driving ring 10 is meshed with a helical gear 12 rotatably connected to the inner wall of the combustion chamber 1 through the helical teeth. The helical gear 12 is coaxially connected with a spur gear 13. A rack 14 meshing with the spur gear 13 is slidably connected to the inner wall of the combustion chamber 1. Paddles 15 are respectively provided on both sides of one end of the rack 14, one of which extends outside the combustion chamber 1, and the other paddle 15 is located in the combustion chamber 1. A sliding sleeve 1 is provided on one side of the nut 5. 6. A slide rod 17 is slidably connected in the slide sleeve 16, and one end of the slide rod 17 is detachably abutted against the paddle 15. An elastic member 8 is provided between the slide rod 17 and the slide sleeve 16, and the elastic member 8 enables the slide rod 17 to maintain a tendency to move along the slide sleeve 16 in a direction away from the paddle 15. A slide groove 18 cooperating with the other end of the slide rod 17 is provided on the inner wall of the combustion chamber 1, and the end of the slide groove 18 away from the main combustion chamber gradually moves away from the slide rod 17 along the direction from the main combustion chamber to the electrode chamber. A baffle 19 is hingedly connected to one end of the slide rod 17 close to the paddle 15. A limit plate 20 cooperating with the baffle 19 is provided at one end of the slide rod 17 close to the paddle 15 and on the side of the baffle 19 facing the main combustion chamber, and a torsion spring 21 is provided between the baffle 19 and the slide rod 17.

[0056] By adopting the above structure, during installation, annular mounting parts 23 extending inwards can be provided on both sides of the middle part of the inner wall of the combustion chamber 1. The annular mounting part 23 can be installed in the combustion chamber 1 by welding or other connection methods. Of course, it can also be integrally formed in the combustion chamber 1. The specific form can be selected according to actual needs. After the protective doors 9 are installed on the mounting parts 23 on both sides, the main combustion chamber in the middle of the isolation surface of the combustion chamber 1 and the electrode chambers on both sides are separated. A set of driving mechanism, protective mechanism and electrode 2 are provided in each of the two electrode chambers.

[0057] The center of the annular mounting portion 23 can be a small circular hole for the electrode 2 to pass through. One end of the protective door 9 can be a circle that matches the small hole in the center of the annular mounting portion 23, and the circle can be larger than the small hole. The other end can be an extension portion for connecting with the annular mounting portion 23 through a rotating shaft. The protective door 9 is installed on a side of the annular mounting portion 23 facing the electrode chamber.

[0058] One side of the drive ring 10 is coaxially rotatably connected to the side of the annular mounting portion 23 facing the electrode chamber through a plane bearing. The drive ring 10 is located on the periphery of the protective door 9, and both ends of the drive rod 11 are respectively connected to the side of the drive ring 10 facing the electrode chamber and the edge of the circular part of the protective door 9 through a rotating shaft.

[0059] The bevel gear 12 is rotatably connected to the inner wall of the electrode chamber through a rotating shaft, and the moving direction of the rack 14 is consistent with the moving direction of the nut 5. A T-shaped slot (T-shaped cross section) can be opened on the inner wall of the electrode chamber, and the rack 14 is also T-shaped accordingly. To facilitate the movement of one of the paddles 15, a clearance hole arranged along the moving direction of the nut 5 can be opened on the side wall of the electrode chamber to allow one of the paddles 15 to extend to the outside of the electrode chamber, providing moving space for the paddle 15 when it is paddled, that is, the T-shaped slot of the electrode chamber is further changed to a cross slot.

[0060] The two ends of the sliding sleeve 16 are through-connected, and the through holes at the two ends of the sliding sleeve 16 extend inward to form an outer limit portion. The middle part of the sliding rod 17 is provided with an inner limit portion extending outward, and an elastic member 8 is provided between the bottom surface of the inner limit portion and the top surface of the outer limit portion on the sliding sleeve 16 close to the baffle 19 end. The elastic member 8 can be a spring, which maintains the tendency to push the inner limit portion toward the outer limit portion on the sliding sleeve 16 away from the baffle 19 end.

[0061] In the initial state of the device, the paddle 15 is located on the side of the baffle 19 close to the main combustion chamber. When ignition is required, the paddle 15 outside the combustion chamber 1 is first moved, and the rack 14 drives the spur gear 13, the bevel gear 12 and the drive ring 10. When the drive ring 10 rotates, it drives the protective door 9 through the drive rod 11, and rotates with the rotation connection point between the protective door 9 and the inner wall of the combustion chamber 1 as the center of the circle, thereby exposing the small hole on the annular mounting portion 23 for the electrode 2 to pass through. Then the motor 3 is started to drive the lead screw 4 pair, thereby driving the electrode 2 through the small hole into the main combustion chamber for ignition. During the period of movement of the nut 5, the slide groove 18 pushes the slide rod 17 in the direction close to the baffle 19 until the slide rod 17 leaves the inclined section of the slide groove 18. When the nut 5 moves to the end of its stroke, the baffle 19 contacts the paddle 15 and is blocked by the paddle 15. The baffle 19 rotates to bypass the paddle 15 until the nut 5 continues to move forward and the baffle 19 bypasses the paddle 15 and is reset under the action of the torsion spring 21. Then the motor 3 stops working and the electrode 2 enters the main combustion chamber for power-on ignition.

[0062] After the electrode 2 has completed ignition, the motor 3 is started again to move the nut 5 back, and then the baffle 19 contacts the paddle 15 again. Due to the limiting effect of the limiting plate 20, the baffle 19 will drive the paddle 15 to move together, and then the paddle 15 drives the spur gear 13, the bevel gear 12 and the drive ring 10. When the drive ring 10 rotates, it will drive the protective door 9 through the drive rod 11, and rotate with the rotation connection point between the protective door 9 and the inner wall of the combustion chamber 1 as the center of the circle. The protective door 9 gradually closes the small hole on the annular mounting portion 23, and the electrode 2 is gradually reset. When the paddle 15 is reset, the slide bar 17 also enters the inclined section of the slide groove 18. Under the action of the elastic member 8, the slide bar 17 moves to the end away from the baffle 19, and the baffle 19 is separated from the paddle 15, and the device returns to the initial state. It can be seen that when the electrode 2 is reset, it will also automatically drive the protective door 9 to reset, so as to avoid forgetting to close the protective door 9 and causing a lack of protection measures for the electrode 2.

[0063] To sum up, in the process of driving the movement of the electrode 2, this embodiment can not only prevent the electrode 2 from entering the main combustion chamber to protect the electrode 2 when the motor 3 is mistakenly operated to move the electrode 2 without opening the protective door 9, but also avoid direct blocking of the electrode 2 to cause damage to the electrode 2 during protection. After normal ignition, when the electrode 2 is reset, it can also automatically drive the protective door 9 to reset and complete the closing of the electrode chamber, thereby preventing the protective door 9 from being forgotten to close.

[0064] The above-mentioned embodiments only express the specific implementation of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. A platinum-ruthenium alloy doped graphene electrode material, characterized in that: The invention is made of the following raw materials: platinum powder, ruthenium powder and graphene powder.

2. The platinum-ruthenium alloy-doped graphene electrode material according to claim 1, characterized in that: The platinum content in the platinum powder is more than 99.99wt%, the ruthenium content in the ruthenium powder is more than 99.99wt%, and the particle size of the graphene powder is 50nm to 500nm.

3. The platinum-ruthenium alloy-doped graphene electrode material according to claim 2, characterized in that: The weight of ruthenium powder in the raw materials accounts for 5% to 30%, the weight of graphene powder accounts for 0.05% to 0.5%, and the rest is platinum powder.

4. A method for preparing a platinum-ruthenium alloy-doped graphene electrode material, characterized in that: The steps include: Raw materials including platinum powder, ruthenium powder and graphene powder are mixed evenly according to weight ratio and pressed into ingots, which are then sintered at high temperature to form electrode material blanks; the platinum content in the platinum powder is more than 99.99wt%, the ruthenium content in the ruthenium powder is more than 99.99wt%, the particle size of the graphene powder is 50nm~500nm, the weight of ruthenium powder in the raw materials accounts for 5%~30%, the weight of graphene powder accounts for 0.05%~0.5%, and the rest is platinum powder.

5. The method for preparing a platinum-ruthenium alloy-doped graphene electrode material according to claim 4, characterized in that: Platinum powder, ruthenium powder and graphene powder are mixed evenly and then ground by a ball mill to obtain a mixed powder, or they are ground separately and then mixed evenly to obtain a mixed powder, and the mixed powder is made into an ingot.

6. The method for preparing a platinum-ruthenium alloy-doped graphene electrode material according to claim 5, characterized in that: The mixed powder is filled into a pressing die and pressed into an ingot with a diameter of 45 mm using a hydraulic press, or into an ingot with a diameter of 12 mm using an isostatic press.

7. The method for preparing a platinum-ruthenium alloy-doped graphene electrode material according to claim 6, characterized in that: After high-temperature sintering, an ingot with a diameter of 45 mm is heated to 1500 degrees in a heating furnace and then extruded into a billet of electrode material with a diameter of 10 mm using an extruder; an ingot with a diameter of 12 mm is electron beam zone melted into a billet of electrode material with a diameter of 10 mm. During electron beam zone melting, the filament current is 45 A and the high voltage power is 1 kW.

8. An application of a platinum-ruthenium alloy doped graphene electrode material, characterized in that: The electrode is prepared using the platinum-ruthenium alloy-doped graphene electrode material prepared by any preparation method according to any one of claims 4 to 7.

9. An ignition device, comprising a combustion chamber (1) and an electrode (2) arranged in the combustion chamber (1), characterized in that: The electrode (2) is made of a platinum-ruthenium alloy-doped graphene electrode material obtained by the preparation method according to any one of claims 4 to 7; a driving mechanism and a protective mechanism cooperating with the electrode (2) are provided in the combustion chamber (1); the driving mechanism comprises a motor (3) and a lead screw (4) pair, the output shaft of the motor (3) is connected to the lead screw (4), and the electrode (2) is arranged on the nut (5); the protective mechanism comprises a telescopic component and a protective component, the telescopic component comprises an outer cylinder (6) and an inner cylinder (7), the outer cylinder (6) is arranged on the nut (5), and the inner cylinder (7) is slidably arranged on In the hollow cavity of the outer cylinder (6), an elastic member (8) is provided between the inner cylinder (7) and the outer cylinder (6); the electrode (2) is provided in the hollow cavity of the inner cylinder (7) and at least the discharge end of the electrode (2) is exposed outside the inner cylinder (7); the protection assembly comprises a protection door (9), the protection door (9) is used to separate the combustion chamber (1) into a main combustion chamber and an electrode chamber; the electrode (2) is located in the electrode chamber and can be driven by a driving mechanism to enter the main combustion chamber for ignition after the protection door (9) is opened; the protection door (9) is also used to prevent the electrode (2) from entering the main combustion chamber when the driving mechanism is abnormally started.

10. The ignition device according to claim 9, characterized in that: One side of the protective door (9) is rotatably connected to the inner wall of the combustion chamber (1); a driving ring (10) is rotatably connected at a position in the combustion chamber (1) corresponding to the protective door (9); a driving rod (11) is rotatably connected between the driving ring (10) and the other side of the protective door (9); the outer peripheral surface of the driving ring (10) is evenly distributed with helical teeth; the outer side of the driving ring (10) is meshed with a helical gear (12) rotatably connected to the inner wall of the combustion chamber (1) through the helical teeth; the helical gear (12) is coaxially connected with a spur gear (13); a rack (14) meshing with the spur gear (13) is slidably connected to the inner wall of the combustion chamber (1); two sides of one end of the rack (14) are respectively provided with paddles (15), one of which extends outside the combustion chamber (1) and the other paddle (15) is located inside the combustion chamber (1); a sliding sleeve (16) is provided on one side of the nut (5); A slide rod (17) is slidably connected in the slide sleeve (16), one end of the slide rod (17) is detachably abutted against the paddle (15), an elastic member (8) is provided between the slide rod (17) and the slide sleeve (16), and the elastic member (8) enables the slide rod (17) to maintain a tendency to move along the slide sleeve (16) in a direction away from the paddle (15), the inner wall of the combustion chamber (1) is provided with a slide groove (18) matched with the other end of the slide rod (17), One end of the slide groove (18) away from the main combustion chamber gradually moves away from the slide rod (17) along the direction from the main combustion chamber to the electrode chamber, and one end of the slide rod (17) close to the paddle (15) is hinged with a baffle (19), and one end of the slide rod (17) close to the paddle (15) and located on the side of the baffle (19) facing the main combustion chamber is provided with a limiting plate (20) that cooperates with the baffle (19), and a torsion spring (21) is provided between the baffle (19) and the slide rod (17).

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