A grinding fixture for moving arc contacts

Abstract

This utility model relates to the field of moving arc contact processing technology, and in particular to a moving arc contact grinding fixture. The device includes a positioning and guiding structure; the positioning and guiding structure includes a grinding carrier and a positioning top plate; a grinding cavity is formed inside the grinding carrier, and a sand discharge hole is formed at its bottom; the grinding cavity and the sand discharge hole are vertically offset and connected by a guide flow channel, which is used to create a baffle effect on the sandblasting flow passing through the grinding cavity. When in use, the moving arc contact grinding fixture provided by this utility model, by vertically offsetting the grinding cavity and the sand discharge hole, creates a baffle effect on the sandblasting flow entering the grinding cavity through the sand inlet hole, that is, the sandblasting flow in the grinding cavity grinds the surface of the moving arc contact through refraction. This solves the problem that the surface of the moving arc contact is prone to uncleaned areas due to the need for manual contact during sandblasting, where the arc contact surface needs to be manually moved to contact the sandblasting flow.

Description

Technical Field

[0001] This utility model relates to the field of moving arc contact processing technology, and in particular to a moving arc contact grinding fixture. Background Technology

[0002] The moving arc contact is a component that handles the problem of electric arc at the moment of circuit disconnection. When the switching equipment attempts to connect or disconnect the circuit, an electric arc will be generated between the contacts due to factors such as electromagnetic induction. The moving arc contact guides the generated electric arc into the arc extinguishing chamber, thereby protecting the main contacts from electric arc damage. In order to avoid the influence of oxides or contaminants on the moving arc contact, grinding and cleaning are required during the manufacturing process of the moving arc contact.

[0003] In the prior art, during the grinding process of moving arc contacts, the oxides or contaminants on the surface of the moving arc contact are removed by the sandblasting flow output from the sandblasting machine. However, since the surface of the arc contact needs to be manually moved to contact the sandblasting flow during the sandblasting process, uncleaned areas are easily formed on the surface of the moving arc contact, which affects the grinding effect of the moving arc contact. Utility Model Content

[0004] This utility model provides a grinding fixture for moving arc contacts to solve the problem that the surface of the moving arc contact is easily left uncleaned due to the need to manually move the surface of the arc contact to contact the sandblasting flow during the sandblasting process, which affects the grinding effect of the moving arc contact.

[0005] To solve the above-mentioned technical problems, the technical solution provided by this utility model is as follows:

[0006] A grinding fixture for moving arc contacts:

[0007] It includes a positioning and guiding structure; the positioning and guiding structure includes a grinding carrier and a positioning top plate; the grinding carrier has a grinding cavity inside and a sand discharge hole at its bottom; the grinding cavity and the sand discharge hole are staggered in the vertical direction and are connected by a guide flow channel to generate a baffle effect for the sandblasting flow passing through the grinding cavity;

[0008] The positioning top plate abuts against the top of the grinding carrier to fix the moving arc contact in the grinding cavity, and its top is provided with a sand inlet hole communicating with the grinding cavity.

[0009] Furthermore, it also includes a vibration structure; the vibration structure includes a vibration motor, a vibration spring, and a support base plate; the vibration motor is mounted on the grinding carrier; one end of the vibration spring is connected to the grinding carrier, and the other end is connected to the support base plate.

[0010] Furthermore, it also includes a sandblasting structure; the sandblasting structure includes an adapter, a spherical bearing, and a spray gun; one end of the adapter is connected to the sand inlet hole, and the other end is fitted onto the spherical bearing; the spherical bearing is fitted onto the spray gun; the vibration structure, in cooperation with the spherical bearing, drives the spray gun to swing, so as to change the position of the spray gun outlet located in the sand inlet hole.

[0011] Furthermore, the sandblasting structure also includes a counterweight collar; the counterweight collar is fitted onto the end of the spray gun away from the joint bearing, and is used to increase the swing amplitude of the spray gun.

[0012] Furthermore, the positioning top plate has a positioning ring groove on the side facing the grinding carrier to limit the displacement of the moving arc contact in the horizontal direction.

[0013] Furthermore, the positioning and guiding structure also includes a lifting push cylinder; the lifting push cylinder is inserted into the grinding carrier, and its telescopic end is connected to the positioning top plate, for driving the positioning top plate to move in the vertical direction.

[0014] Furthermore, the sand inlet hole, the grinding chamber, the guide channel, and the sand outlet hole are sequentially connected to form a grinding channel; the positioning and guiding structure includes multiple grinding channels to increase the number of moving arc contacts in a single grinding operation.

[0015] Furthermore, the sandblasting structure includes multiple sandblasting branches and an air collection tank; the sandblasting branches include an adapter, a spherical bearing, a spray gun, a counterweight collar, and an air inlet hose; one end of the air inlet hose is connected to the air inlet of the spray gun, and the other end is connected to the outlet of the air collection tank; the air collection tank is connected to the positioning top plate to prevent the multiple swinging spray guns from interfering with each other.

[0016] Furthermore, an auxiliary hole is provided at the bottom of the carrier substrate; the auxiliary hole is located below the sand discharge hole and is used to allow the sandblasting flow output from the sand discharge hole to pass through the carrier substrate.

[0017] Furthermore, the vibration structure also includes a barrier sleeve; one end of the barrier sleeve is connected to the auxiliary hole, and the other end is connected to the bottom of the grinding carrier; the plurality of sand discharge holes are all located inside the barrier sleeve.

[0018] The beneficial effects of this utility model's grinding fixture for moving arc contacts are analyzed as follows:

[0019] The device includes a positioning and guiding structure; the positioning and guiding structure includes a grinding carrier and a positioning top plate; a grinding cavity is provided inside the grinding carrier, and a sand discharge hole is provided at its bottom; the grinding cavity and the sand discharge hole are staggered in the vertical direction, and the two are connected through a guide flow channel to generate a baffle effect for the sandblasting flow passing through the grinding cavity; the positioning top plate is pressed against the top of the grinding carrier to fix the moving arc contact in the grinding cavity, and a sand inlet hole communicating with the grinding cavity is provided on its top.

[0020] The grinding fixture for moving arc contacts provided by this utility model, when used, arranges the grinding chamber and the sand discharge hole in a staggered manner in the vertical direction, so that the sandblasting flow entering the grinding chamber through the sand inlet hole generates a baffle effect. That is, the sandblasting flow in the grinding chamber grinds the surface of the moving arc contact through refraction, thereby solving the problem that the surface of the moving arc contact is prone to have uncleaned areas. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the specific embodiments or related technologies of this utility model, the drawings used in the description of the specific embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0022] Figure 1 A schematic diagram of the structure of the dynamic arc contact grinding fixture provided in this embodiment of the utility model;

[0023] Figure 2 A front view of the moving arc contact grinding fixture provided in this embodiment of the utility model;

[0024] Figure 3 A cross-sectional view of the moving arc contact grinding fixture provided in this embodiment of the utility model;

[0025] Figure 4 This utility model provides a schematic diagram of the positioning and guiding structure excluding the lifting push cylinder;

[0026] Figure 5 For along Figure 4 A cross-sectional view obtained from section line AA;

[0027] Figure 6 A schematic diagram of the sandblasting structure provided in this embodiment of the utility model;

[0028] Figure 7 The three-dimensional exploded view of the sandblasting branch provided in this embodiment of the invention

[0029] icon:

[0030] 100-Positioning and guiding structure; 110-Grinding carrier; 111-Grinding chamber; 112-Sand discharge hole; 113-Guiding channel; 120-Positioning top plate; 121-Sand inlet hole; 130-Lifting push cylinder; 200-Vibration structure; 210-Vibration motor; 220-Vibration spring; 230-Bearing base plate; 231-Auxiliary hole; 240-Barrier sleeve; 300-Sandblasting structure; 310-Sandblasting branch; 311-Adapter; 312-Spherical bearing; 313-Spray gun; 314-Counterweight collar; 315-Air inlet hose; 320-Air collection tank. Detailed Implementation

[0031] Because the surface of the moving arc contact needs to be manually moved to contact the sandblasting flow during the sandblasting process, uncleaned areas are easily formed on the surface of the moving arc contact, which affects the grinding effect of the moving arc contact.

[0032] In view of this, this solution provides a grinding fixture for a moving arc contact, including a positioning and guiding structure 100.

[0033] The following combination Figures 1-7 The structure and shape of the grinding fixture for the moving arc contact are described in detail:

[0034] The positioning and guiding structure 100 includes a grinding carrier 110 and a positioning top plate 120; the grinding carrier 110 has a grinding cavity 111 inside, and a sand discharge hole 112 is provided at its bottom; the grinding cavity 111 and the sand discharge hole 112 are staggered in the vertical direction, and the two are connected through a guide flow channel 113, which is used to generate a baffle effect for the sandblasting flow passing through the grinding cavity 111; the positioning top plate 120 is pressed against the top of the grinding carrier 110, which is used to fix the moving arc contact in the grinding cavity 111, and a sand inlet hole 121 communicating with the grinding cavity 111 is provided at its top.

[0035] In this embodiment, the sandblasting flow enters the grinding chamber 111 through the sand inlet hole 121. Since the grinding chamber 111 and the sand outlet hole 112 are staggered in the vertical direction, the sandblasting flow is refracted after grinding the inner wall of the moving arc contact. The refracted sandblasting flow grinds the inner wall, bottom end and outer surface of the moving arc contact to remove the oxide layer or contaminants on the working surface of the moving arc contact. The abrasive that loses kinetic energy in the sandblasting flow is output from the sand outlet hole 112 through the guide channel 113.

[0036] To avoid the likelihood of abrasive clogging the guide channel 113:

[0037] like Figures 1-2 As shown, it also includes a vibration structure 200; the vibration structure 200 includes a vibration motor 210, a vibration spring 220 and a support substrate 230; the vibration motor 210 is mounted on the grinding carrier 110; one end of the vibration spring 220 is connected to the grinding carrier 110 and the other end is connected to the support substrate 230.

[0038] In this embodiment, in order to avoid the influence of the guide channel 113 on the refraction effect of the sandblasting flow, it is necessary to reduce the height of the guide channel 113. The vibration spring 220 transmits vibration stress to the vibration spring 220 through the grinding carrier 110, so that the vibration spring 220 undergoes reciprocating deformation, thereby driving the positioning guide structure 100 to make irregular reciprocating motion, so as to disperse the abrasive gathered in the guide channel 113, thereby avoiding the probability of abrasive clogging the guide channel 113.

[0039] In addition, due to the irregular reciprocating motion of the positioning and guiding structure 100 during the above process, the trajectory of the sandblasting flow is further disturbed to enhance the grinding effect of the moving arc contact. At the same time, the impact position of the sandblasting flow in the grinding cavity 111 is changed, which slows down the wear rate of the grinding carrier 110.

[0040] To increase the distribution range of the sandblasting flow within the grinding chamber 111:

[0041] like Figure 1 , Figure 6 and Figure 7 As shown, it also includes a sandblasting structure 300; the sandblasting structure 300 includes an adapter 311, a spherical bearing 312 and a spray gun 313; one end of the adapter 311 is connected to the sand inlet hole 121, and the other end is fitted onto the spherical bearing 312; the spherical bearing 312 is fitted onto the spray gun 313; the vibration structure 200 drives the spray gun 313 to swing under the cooperation of the spherical bearing 312, so as to change the position of the outlet of the spray gun 313 located in the sand inlet hole 121.

[0042] In this embodiment, the vibration structure 200 transmits vibration stress to the spray gun 313 through the grinding carrier 110, so that the spray gun 313 swings under the cooperation of the spherical bearing 312. The swinging spray gun 313 drives the sandblasting flow discharged from its output end to move, thereby increasing the distribution range of the sandblasting flow in the grinding chamber 111.

[0043] In addition, when the sandblasting flow moves to one side of the inner wall of the moving arc contact, part of the sandblasting flow comes into contact with the inner wall of the grinding chamber 111 through the gap in the moving arc contact and is reflected. The reflected sandblasting flow preferentially grinds the upper side of the outer surface of the moving arc storage head.

[0044] To increase the swing amplitude of the spray gun 313:

[0045] like Figure 7 As shown, the sandblasting structure 300 also includes a counterweight collar 314; the counterweight collar 314 is fitted onto the end of the spray gun 313 away from the joint bearing 312, and is used to increase the swing amplitude of the spray gun 313.

[0046] In this embodiment, by fitting the counterweight collar 314 onto the end of the spray gun 313 away from the joint bearing 312, the center of gravity of the spray gun 313 is raised, thereby increasing the swing amplitude of the spray gun 313.

[0047] To ensure the relative position of the moving arc contact and the grinding cavity 111:

[0048] like Figure 3 As shown, the positioning top plate 120 has a positioning ring groove on the side facing the grinding carrier 110, which is used to limit the displacement of the moving arc contact in the horizontal direction.

[0049] In this embodiment, the moving arc contact is positioned by a positioning ring groove to limit the horizontal displacement of the moving arc contact and prevent it from moving during the grinding process, thereby ensuring the relative position of the moving arc contact and the grinding chamber 111.

[0050] In addition, by setting the positioning ring groove on the positioning top plate 120, after the positioning top plate 120 is separated from the grinding carrier 110, the part of the moving arc contact protrudes out of the grinding carrier 110, which makes it easier for the operator to remove the moving arc contact from the grinding carrier 110.

[0051] In order to ensure that the positioning top plate 120 is pressed against the top of the grinding carrier 110:

[0052] like Figure 3 As shown, the positioning and guiding structure 100 also includes a lifting push cylinder 130; the lifting push cylinder 130 is inserted into the grinding carrier 110, and its telescopic end is connected to the positioning top plate 120, which is used to drive the positioning top plate 120 to move in the vertical direction.

[0053] In this embodiment, the lifting push cylinder 130 transmits a vertically downward driving force to the positioning top plate 120 so that the positioning top plate 120 abuts against the top of the grinding carrier 110.

[0054] In addition, after the moving arc contact is ground, the lifting push cylinder 130 drives the positioning top plate 120 to move vertically upward, so as to provide sufficient space for the operator to take out the moving arc contact.

[0055] To increase the number of arc-prone contacts that can be processed in a single grinding cycle:

[0056] like Figure 3 As shown, the sand inlet hole 121, grinding chamber 111, guide channel 113 and sand outlet hole 112 are connected in sequence to form a grinding channel; the positioning guide structure 100 includes multiple grinding channels to increase the number of moving arc contacts in a single grinding.

[0057] In this embodiment, by setting multiple grinding channels in the positioning and guiding structure 100, multiple moving arc contacts can be ground simultaneously, thereby increasing the number of moving arc contacts that can be ground in a single grinding operation, and thus improving the grinding efficiency of the moving arc contacts.

[0058] In order to allow the sandblasting structure 300 to simultaneously input sandblasting streams into multiple grinding channels:

[0059] like Figure 6 As shown, the sandblasting structure 300 includes multiple sandblasting branches 310 and an air collection tank 320; the sandblasting branch 310 includes an adapter 311, a spherical bearing 312, a spray gun 313, a counterweight collar 314, and an air inlet hose 315; one end of the air inlet hose 315 is connected to the air inlet of the spray gun 313, and the other end is connected to the outlet of the air collection tank 320; the air collection tank 320 is connected to the positioning top plate 120 to prevent multiple swinging spray guns 313 from interfering with each other.

[0060] In this embodiment, compressed air in the air collection tank 320 enters the spray gun 313 through the air inlet hose 315. The vacuum suction generated by the compressed air in the spray gun 313 drives the abrasive into the spray gun 313, thereby forming a sandblasting flow in the spray gun 313. At the same time, by setting multiple sandblasting branches 310, sandblasting flows are simultaneously input into multiple grinding channels.

[0061] In addition, by connecting the air collection tank 320 to the positioning top plate 120, the air collection tank 320 and the positioning top plate 120 remain relatively stationary during the swing of the spray gun 313, thereby avoiding mutual interference between multiple swinging spray guns 313.

[0062] In order to ensure that the abrasive output from the sand discharge hole 112 can be recovered in a timely manner:

[0063] like Figure 3 An auxiliary hole 231 is provided at the bottom of the carrier substrate 230 shown; the auxiliary hole 231 is located below the sand discharge hole 112 and is used to allow the sandblasting flow output from the sand discharge hole 112 to pass through the carrier substrate 230.

[0064] In this embodiment, the abrasive output from the sand discharge hole 112 moves downward under the action of compressed air and gravity. The moving abrasive passes through the auxiliary hole 231 and passes through the support substrate 230, thereby enabling the abrasive to be recovered by the sandblasting machine in a timely manner.

[0065] To avoid the abrasive causing interference to the vibrating structure 200:

[0066] like Figure 3 As shown, the vibration structure 200 also includes a barrier sleeve 240; one end of the barrier sleeve 240 is connected to the auxiliary hole 231, and the other end is connected to the bottom of the grinding carrier 110; multiple sand discharge holes 112 are located inside the barrier sleeve 240.

[0067] In this embodiment, since the bearing surface of the sandblasting machine used to support the grinding fixture for the moving arc contact is a perforated mesh plate, the abrasive is recovered through the holes in the perforated mesh plate. Some of the abrasive is reflected by the perforated mesh plate, and the reflected abrasive is blocked by the blocking sleeve 240 and constrained to continue passing through the perforated mesh plate.

[0068] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A grinding fixture for a moving arc contact, characterized in that: Includes a positioning and flow guiding structure (100); The positioning and guiding structure (100) includes a grinding carrier (110) and a positioning top plate (120). The grinding carrier (110) has a grinding chamber (111) inside and a sand discharge hole (112) at its bottom; the grinding chamber (111) and the sand discharge hole (112) are staggered in the vertical direction and are connected by a guide channel (113) to make the sandblasting flow passing through the grinding chamber (111) generate a baffle effect. The positioning top plate (120) abuts against the top of the grinding carrier (110) to fix the moving arc contact in the grinding cavity (111), and its top is provided with a sand inlet hole (121) communicating with the grinding cavity (111).

2. The grinding fixture for the moving arc contact according to claim 1, characterized in that: It also includes a vibrating structure (200); The vibration structure (200) includes a vibration motor (210), a vibration spring (220), and a support base plate (230). The vibration motor (210) is mounted on the grinding carrier (110); one end of the vibration spring (220) is connected to the grinding carrier (110), and the other end is connected to the bearing substrate (230).

3. The grinding fixture for the moving arc contact according to claim 2, characterized in that: It also includes a sandblasting structure (300); The sandblasting structure (300) includes an adapter (311), a spherical bearing (312), and a spray gun (313). One end of the adapter (311) is connected to the sand inlet (121), and the other end is fitted onto the spherical bearing (312). The spherical bearing (312) is fitted onto the spray gun (313). The vibration structure (200) drives the spray gun (313) to swing under the cooperation of the spherical bearing (312) to change the position of the spray gun (313) outlet located in the sand inlet (121).

4. The grinding fixture for the moving arc contact according to claim 3, characterized in that: The sandblasting structure (300) also includes a counterweight collar (314). The counterweight collar (314) is fitted onto the end of the spray gun (313) away from the joint bearing (312) to increase the swing amplitude of the spray gun (313).

5. The grinding fixture for the moving arc contact according to claim 4, characterized in that: The positioning top plate (120) has a positioning ring groove on the side facing the grinding carrier (110) to limit the displacement of the moving arc contact in the horizontal direction.

6. The grinding fixture for the moving arc contact according to claim 5, characterized in that: The positioning and guiding structure (100) also includes a lifting push cylinder (130). The lifting cylinder (130) is inserted into the grinding carrier (110), and its telescopic end is connected to the positioning top plate (120) to drive the positioning top plate (120) to move in the vertical direction.

7. The grinding fixture for the moving arc contact according to claim 6, characterized in that: The sand inlet hole (121), the grinding chamber (111), the guide channel (113), and the sand outlet hole (112) are connected in sequence to form a grinding channel; The positioning and guiding structure (100) includes multiple grinding channels to increase the number of moving arc contacts in a single grinding process.

8. The grinding fixture for the moving arc contact according to claim 7, characterized in that: The sandblasting structure (300) includes multiple sandblasting branches (310) and a gas collection tank (320). The sandblasting branch (310) includes an adapter (311), a spherical bearing (312), a spray gun (313), a counterweight collar (314), and an air intake hose (315). One end of the air inlet hose (315) is connected to the air inlet of the spray gun (313), and the other end is connected to the outlet of the air collection tank (320). The gas collection tank (320) is connected to the positioning top plate (120) to prevent the multiple swinging spray guns (313) from interfering with each other.

9. The grinding fixture for the moving arc contact according to claim 8, characterized in that: An auxiliary hole (231) is provided at the bottom of the carrier substrate (230). The auxiliary hole (231) is located below the sand discharge hole (112) and is used to allow the sandblasting flow output from the sand discharge hole (112) to pass through the carrier substrate (230).

10. The grinding fixture for the moving arc contact according to claim 9, characterized in that: The vibration structure (200) also includes a barrier sleeve (240). One end of the barrier sleeve (240) is connected to the auxiliary hole (231), and the other end is connected to the bottom of the grinding carrier (110); The multiple sand discharge holes (112) are all located inside the barrier sleeve (240).

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