Knife switch mechanism and contact network grounding detection device

Abstract

The utility model discloses a disconnecting link mechanism and a contact network grounding detection device, the disconnecting link mechanism comprises a disconnecting link base, a main shaft, a first crank and a second crank, the main shaft is rotatably arranged on the disconnecting link base, the first crank and the second crank are arranged on the main shaft, and the first crank, the second crank and the main shaft are integrally formed. According to the disconnecting link mechanism provided by the utility model, through the structural arrangement, when the disconnecting link mechanism is applied to equipment such as a contact network grounding detection device and the like, and switching-on and switching-off operations are executed, the first crank, the second crank and the main shaft can move synchronously, so that the first crank and the second crank can be prevented from shaking relative to the main shaft, and further the influence on the operation of operators is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of knife switches, in particular to a knife switch mechanism and a contact network grounding detection device. Background Art

[0002] With the rapid development of electrified railways in my country, our electrified railways have built an electrified railway network. With the increase of electrified railways, new requirements have been put forward for the inspection and maintenance of contact networks. The grounding work of traditional contact networks is mainly completed manually, with low automation and low work efficiency. In related technologies, a 27.5kV high-voltage grounding device is used, which realizes the automatic grounding function of the contact network. However, in the high-voltage grounding device, the main shaft and crank of the knife switch mechanism adopt a split design. When performing the opening and closing operation, there is shaking between the main shaft and the crank, which affects the operation of the staff. Utility Model Content

[0003] The embodiments of the utility model provide a knife switch mechanism and a contact network grounding detection device to solve the technical problem in the prior art that shaking is easy to occur between the main shaft and the crank when performing opening and closing operations.

[0004] An embodiment of the utility model provides a knife gate mechanism, including a knife gate base, a main shaft, a first crank and a second crank, wherein the main shaft is rotatably arranged on the knife gate base, the first crank and the second crank are arranged on the main shaft, and the first crank, the second crank and the main shaft are integrally formed.

[0005] Optionally, the knife gate mechanism further includes a first limit block and a first stop block;

[0006] The first limit block is arranged on the main shaft, and the two first stop blocks are arranged on the knife gate base and are located on both sides of the main shaft and on the first rotation path of the first limit block to limit the first limit block.

[0007] Optionally, the knife gate mechanism also includes a fixing part, an opening is provided at one end of the knife gate base, a mounting hole is provided at the other end opposite to the knife gate base, the main shaft is rotatably mounted on the opening and the mounting hole, and the fixing part is arranged at the opening of the knife gate base so that the main shaft is confined within the opening.

[0008] The embodiment of the utility model further provides a contact network grounding detection device, comprising a transmission mechanism, a drive mechanism and the above-mentioned knife switch mechanism, wherein the drive mechanism is connected to the main shaft through the transmission mechanism.

[0009] Optionally, the contact network grounding detection device further includes a camera, a display screen and a first controller;

[0010] The camera is used to monitor the disconnecting switch mechanism, and the camera and the display screen are respectively communicatively connected to the first controller.

[0011] Optionally, the driving mechanism includes a first output shaft;

[0012] The transmission mechanism includes a transmission rod, a first connection assembly and a second connection assembly. One end of the first connection assembly is in transmission connection with the main shaft, and the other end is hinged to the upper end of the transmission rod; One end of the second connection assembly is in transmission connection with the first output shaft, and the other end is hinged to the lower end of the transmission rod. The connection tightness between the first connection assembly and the transmission rod and between the second connection assembly and the transmission rod can be adjusted.

[0013] Optionally, the first connection assembly includes a first connection block and a first pin. One end of the first connection block is in transmission connection with the main shaft, and at least two first pin holes are formed at the other end of the first connection block. The first pin is arranged at one end of the transmission rod, and the first pin is in mating connection with one of the first pin holes, so that the other end of the first connection block is hinged to one end of the transmission rod;

[0014] The second connection assembly includes a second connection block and a second pin. One end of the second connection block is in transmission connection with the first output shaft, and at least two second pin holes are formed at the other end of the second connection block. The second pin is arranged at one end of the transmission rod, and the second pin is in mating connection with one of the second pin holes, so that the other end of the second connection block is hinged to the other end of the transmission rod.

[0015] Optionally, the first connection assembly further includes a first expansion sleeve. A first transmission hole is further formed at one end of the first connection block, and the first expansion sleeve is arranged in the first transmission hole, and the main shaft is installed in the first expansion sleeve;

[0016] The second connection assembly further includes a second expansion sleeve. A second transmission hole is further formed at one end of the second connection block, and the second expansion sleeve is arranged in the second transmission block, and the first output shaft is installed in the second expansion sleeve.

[0017] Optionally, the driving mechanism further includes a mounting seat, a driving element, a second limiting block and a second stop block;

[0018] The driving element is electrically connected to the first controller. The driving element and the two second stop blocks are arranged on the mounting seat. The driving element includes a second output shaft, a connection groove is formed at the end of the second output shaft, and a connection protrusion is arranged at the end of the first output shaft. The connection protrusion is in mating connection with the connection groove, so that the first output shaft is in transmission connection with the second output shaft;

[0019] The second limit block is arranged on the first output shaft, and two second limit blocks are located on both sides of the first output shaft. The two second limit blocks are respectively located on the second rotation path of the second limit block to limit the second limit block.

[0020] Optionally, the driving mechanism further includes an auxiliary switch, a first magnetic blow switch, a second magnetic blow switch, a cam and a connecting rod assembly, the auxiliary switch is connected to the first output shaft through the connecting rod assembly, and the auxiliary switch is electrically connected to the first controller to obtain the closed state of the knife switch mechanism;

[0021] The cam is arranged on the second output shaft, the first magnetic blow switch and the second magnetic blow switch are arranged on the mounting seat, the first magnetic blow switch and the second magnetic blow switch are respectively located on both sides of the cam and on the third rotation path of the cam, and the first magnetic blow switch and the second magnetic blow switch are respectively electrically connected to the first controller to control the rotation angle of the driving element.

[0022] In the knife switch mechanism of the utility model, through the above-mentioned structural setting, when the knife switch mechanism is applied to equipment such as the contact network grounding detection device, when performing opening and closing operations, the first crank, the second crank and the main shaft can move synchronously, which can avoid the first crank and the second crank from shaking relative to the main shaft, thereby avoiding affecting the operator's operation.

[0023] The contact network grounding detection device of the present invention also has the advantages of the above-mentioned knife switch mechanism, which will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0025] Figure 1 A diagram showing the connection relationship between the knife switch mechanism, the first contact network contact and the second contact network contact in one embodiment of the utility model;

[0026] Figure 2 Another connection relationship diagram of the knife switch mechanism, the first contact network contact and the second contact network contact in one embodiment of the utility model;

[0027] Figure 3 This is a connection diagram of the first limit block, the main shaft, the first crank, and the second crank in one embodiment of the utility model;

[0028] Figure 4 Structural schematic diagram of the knife switch base in an embodiment of the present utility model;

[0029] Figure 5 Structural schematic diagram of the catenary earthing detection device in an embodiment of the present utility model;

[0030] Figure 6 Circuit control schematic diagram of the catenary earthing detection device in an embodiment of the present utility model;

[0031] Figure 7 Connection relationship diagram of the driving mechanism and the display screen in an embodiment of the present utility model;

[0032] Figure 8 Structural schematic diagram of the catenary earthing detection device in another embodiment of the present utility model;

[0033] Figure 9 is Figure 8 Enlarged view of part A of the identification part in;

[0034] Figure 10 Structural schematic diagram of the driving mechanism in an embodiment of the present utility model;

[0035] Figure 11 Cross-sectional view of the driving mechanism in an embodiment of the present utility model;

[0036] Figure 12 Partial unfolded view of the driving mechanism in an embodiment of the present utility model;

[0037] Figure 13 Connection relationship diagram of the second limit block, the second stop block, the driving element, and the first output shaft in an embodiment of the present utility model;

[0038] Figure 14 Structural schematic diagram of the driving mechanism in another embodiment of the present utility model.

[0039] Explanation of the reference numerals in the drawings:

[0040] Catenary earthing detection device, 100; disconnecting switch mechanism, 10; disconnecting switch base, 11; opening, 112; mounting hole, 114; main shaft, 12; first crank, 13; second crank, 14; first limit block, 15; first stop block, 16; first disconnecting switch contact, 17; second disconnecting switch contact, 18; fixing member, 19; transmission mechanism, 20; transmission rod, 21; first connection assembly, 22; first connection block, 222; first pin, 224; first pin hole, 226; first expansion sleeve, 228; first transmission hole, 229; second connection assembly, 23; second connection block, 232; second pin, 234; second pin hole, 236; second expansion sleeve, 238; second transmission hole, 239; drive mechanism, 30; first output shaft, 31; connection projection, 312; mounting seat, 32; drive element, 33; second output shaft, 332; connection groove, 3322; second limit block, 34; second stop block, 35; auxiliary switch, 36; connecting rod assembly, 37; first magnetic blowout switch, 382; second magnetic blowout switch, 384; cam, 39; camera, 40; display screen, 50; catenary, 200; first catenary contact, 201; second catenary contact, 202; rail, 300; first cable, 301; excitation mutual inductor, 3012; second cable, 302; induction mutual inductor, 3022; second controller, 303.

[0041] The realization of the purpose, functional features and advantages of the present utility model will be further described with reference to the embodiments and the accompanying drawings. Specific embodiments

[0042] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0043] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present utility model are only used to explain the relative position relationship and movement conditions between components in a specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0044] In addition, the descriptions involving "first", "second", etc. in the present utility model are only for descriptive purposes and should not be construed as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions between various embodiments may be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0045] Please refer to Figures 1 to 3 , Figure 1 which is a connection relationship diagram of the knife switch mechanism 10, the first catenary contact 201 and the second catenary contact 202, wherein the knife switch mechanism 10 is in an open state. Figure 2 which is another connection relationship diagram of the knife switch mechanism 10, the first catenary contact 201 and the second catenary contact 202, wherein the knife switch mechanism 10 is in a closed state. Figure 3 which is a structural schematic diagram of the knife switch base 11.

[0046] An embodiment of the present utility model provides a knife switch mechanism 10, including a knife switch base 11, a main shaft 12, a first crank 13 and a second crank 14. The main shaft 12 is rotatably arranged on the knife switch base 11, the first crank 13 and the second crank 14 are arranged on the main shaft 12, and the first crank 13, the second crank 14 and the main shaft 12 are integrally formed.

[0047] In the knife switch mechanism 10 of this embodiment, the knife switch base 11 is used to install the main shaft 12, the main shaft 12 can rotate on the knife switch base 11, and the first crank 13 and the second crank 14 can be integrally formed with the main shaft 12 by welding. It can be understood that the first crank 13 and the second crank 14 can also be integrally formed with the main shaft 12 by other means. With such a setting, when the knife switch mechanism 10 is applied to equipment such as a catenary grounding detection device, during the opening and closing operations, the first crank 13, the second crank 14 and the main shaft 12 can move synchronously, which can avoid the first crank 13 and the second crank 14 from shaking relative to the main shaft 12, and further avoid affecting the operation of the operator.

[0048] In one embodiment, the knife switch mechanism 10 further includes a first limit block 15 and a first stop block 16; the first limit block 15 is arranged on the main shaft 12, and two first stop blocks 16 are arranged on the knife switch base 11 and are located on both sides of the main shaft 12 and are both on the first rotation path of the first limit block 15 to limit the first limit block 15.

[0049] When the main shaft 12 drives the first limit block 15, the first crank 13, and the second crank 14 to rotate in one direction to the first limit position, one of the first stoppers 16 can block the first limit block 15, thereby limiting the first limit block 15, the main shaft 12, the first crank 13, and the second crank 14 to avoid damaging the first crank 13 and the second crank 14. When the main shaft 12 drives the first limit block 15, the first crank 13, and the second crank 14 to rotate in the other direction to the second limit position, the other first stopper 16 can block the first limit block 15, thereby limiting the first limit block 15, the main shaft 12, the first crank 13, and the second crank 14 to avoid damaging the first crank 13 and the second crank 14.

[0050] In one embodiment, the knife switch mechanism 10 further includes a first knife switch contact 17 and a second knife switch contact 18. The first knife switch contact 17 is provided on the first crank 13, and the second knife switch contact 18 is provided on the second crank 14. The first knife switch contact 17 and the second knife switch contact 18 are respectively used to connect to the catenary. In this way, when the first crank 13 drives the first knife switch contact 17 to close and the second crank 14 drives the second knife switch contact 18 to close, the circuit can be conducted. It can be understood that the first knife switch contact 17 and the first crank 13 can be integrally formed. When they are integrally formed, the first knife switch contact 17 can be a part of the first crank 13. Alternatively, the first knife switch contact 17 and the first crank 13 can be detachably connected. It can be understood that the second knife switch contact 18 and the second crank 14 can be integrally formed. When they are integrally formed, the second knife switch contact 18 can be a part of the second crank 14. Alternatively, the second knife switch contact 18 and the second crank 14 can be detachably connected.

[0051] Please refer to Figure 4 , in one embodiment, the knife switch mechanism 10 further includes a fixing member 19. One end of the knife switch base 11 is provided with an opening 112, and the other end of the knife switch base 11 opposite to it is provided with a mounting hole 114. The main shaft 12 is rotatably mounted on the opening 112 and the mounting hole 114. The fixing member 19 is provided at the opening 112 of the knife switch base 11 to limit the main shaft 12 within the opening 112. During installation, first install one end of the main shaft 12 into the mounting hole 114, then install the other end of the main shaft 12 into the opening 112, and finally close the opening 112 with the fixing member 19 to limit the main shaft 12 within the opening 112 and prevent the main shaft 12 from disengaging from the opening 112. When set in this way, the connection accuracy between the main shaft 12 and the first crank 13, the second crank 14, and the first limit block 15 can be higher. Among them, the fixing member 19 and the knife switch base 11 can be detachably connected, which is convenient for disassembly and assembly and facilitates maintenance.

[0052] Please refer to Figures 5 to 7The embodiment of the utility model also provides a contact network grounding detection device 100, including a transmission mechanism 20, a drive mechanism 30 and the above-mentioned knife switch mechanism 10, wherein the drive mechanism 30 is connected to the main shaft 12 through the transmission mechanism 20. The drive mechanism 30 is used to drive the transmission mechanism 20, and the transmission mechanism 20 can drive the main shaft 12 to rotate. The staff can remotely control the opening and closing of the knife switch mechanism 10, which can further ensure the safety of the staff's work. The contact network grounding detection device 100 of this embodiment also has the advantages of the above-mentioned knife switch mechanism 10, which will not be repeated here.

[0053] In one embodiment, the contact network grounding detection device 100 also includes a camera 40, a display screen 50 and a first controller (not shown in the figure); the camera 40 is used to monitor the knife switch mechanism 10, and the camera 40 and the display screen 50 are respectively connected to the first controller for communication. The camera 40 is used to monitor the working condition of the knife switch mechanism 10 in real time, and can monitor the opening and closing status of the knife switch mechanism 10 in real time. The camera 40 and the first controller can communicate through the network. The first controller can be a board, and the first controller is used for background control and analysis. The display screen 50 is electrically connected to the first controller, and the display screen 50 can display information, which is convenient for staff to operate and control.

[0054] In one embodiment, the knife-switch mechanism 10 is connected between the catenary 200 and the rail 300. Specifically, the first knife-switch contact 17 is connected to the rail 300 through the first cable 301, the second knife-switch contact 18 is connected to the rail 300 through the second cable 302, the catenary 200 is electrically connected to the first catenary contact 201 and the second catenary contact 202 respectively. An excitation transformer 3012 is sleeved on the first cable 301, and an induction transformer 3022 is sleeved on the second cable 302. The excitation transformer 3012 is used to generate an excitation voltage, and the induction transformer 3022 is used to generate an induction current. The excitation transformer 3012 and the induction transformer 3022 are respectively electrically connected to the second controller 303. The second controller 303 can be a board card. After the first knife-switch contact 17 and the first catenary contact 201 are closed, and the second knife-switch contact 18 and the second catenary contact 202 are closed, a grounding loop is formed among the catenary 200, the first cable 301, the rail 300, and the second cable 302. Since the excitation transformer 3012 is sleeved on the first cable 301, the induction transformer 3022 is sleeved on the second cable 302, and the second knife-switch contact 18 and the first knife-switch contact 17 are insulated from each other, the excitation transformer 3012 can generate an excitation voltage, so that the induction transformer 3022 generates an induction current. The second controller 303 calculates the detected resistance according to the excitation voltage and the induction current, and then compares the detected resistance with the resistance threshold. If the detected resistance is within the resistance threshold range, it is determined that the catenary 200 is well grounded. If the detected resistance is not within the resistance threshold range, it is determined that the catenary 200 is poorly grounded. Since the excitation transformer 3012 is located between the first knife-switch contact 17 and the rail 300, and the induction transformer 3022 is located between the second knife-switch contact 18 and the rail 300. The circuits between the first knife-switch contact 17 and the catenary 200, and between the second knife-switch contact 18 and the catenary 200 are primary circuits, and the primary circuits are high-voltage. While the circuits between the first knife-switch contact 17 and the rail 300, and between the second knife-switch contact 18 and the rail 300 are secondary circuits, and the secondary circuits are low-voltage. Without affecting the power supply of the catenary 200, the reliability of the entire detection loop can be ensured by ensuring the reliable operation of the excitation transformer 3012 and the induction transformer 3022.

[0055] Please refer to Figure 8 and Figure 9, in one embodiment, the driving mechanism 30 includes a first output shaft 31; the transmission mechanism 20 includes a transmission rod 21, a first connection assembly 22 and a second connection assembly 23. One end of the first connection assembly 22 is in transmission connection with the main shaft 12, and the other end is hingedly connected to the upper end of the transmission rod 21; one end of the second connection assembly 23 is in transmission connection with the first output shaft 31, and the other end is hingedly connected to the lower end of the transmission rod 21. The connection tightness between the first connection assembly 22 and the transmission rod 21 and between the second connection assembly 23 and the transmission rod 21 can both be adjusted. A first four-bar linkage mechanism can be formed among the transmission rod 21, the first connection assembly 22, the second connection assembly 23, the main shaft 12 and the first output shaft 31. The driving mechanism 30 can rotate forward and backward. When the driving mechanism 30 rotates forward and backward, the first output shaft 31 can drive the main shaft 12 to rotate forward and backward, thereby controlling the on-off of the first knife switch contact 17 and the second knife switch contact 18. Moreover, the connection tightness between the first connection assembly 22 and the transmission rod 21 and between the second connection assembly and the transmission rod 21 can be adjusted. With such a setting, during installation, the connection between the first connection assembly 22 and the transmission rod 21 can be adjusted, and the connection between the second connection assembly 23 and the transmission rod 21 can be adjusted, which improves the installation adaptation range, reduces the installation difficulty, and can also improve the installation accuracy. Among them, the structures of the first connection assembly 22 and the second connection assembly 23 are basically similar.

[0056] In one embodiment, the first connection assembly 22 includes a first connection block 222 and a first pin 224. One end of the first connection block 222 is in transmission connection with the main shaft 12. At the other end of the first connection block 222, at least two first pin holes 226 are provided. The first pin 224 is arranged at one end of the transmission rod 21, and the first pin 224 is in mating connection with a first pin hole 226, so that the other end of the first connection block 222 is hingedly connected to one end of the transmission rod 21; the second connection assembly 23 includes a second connection block 232 and a second pin 234. One end of the second connection block 232 is in transmission connection with the first output shaft 31. At the other end of the second connection block 232, at least two second pin holes 236 are provided. The second pin 234 is arranged at one end of the transmission rod 21, and the second pin 234 is in mating connection with a second pin hole 236, so that the other end of the second connection block 232 is hingedly connected to the other end of the transmission rod 21.

[0057] During installation, according to needs, the first pin 224 can be selected to be installed in a first pin hole 226, which can adjust the relative positions of the first connection block 222 and the transmission rod 21, reduce the installation difficulty, and can also improve the installation accuracy. During installation, according to the installation needs, the second pin 234 can also be selected to be installed in a second pin hole 236, which can adjust the relative positions of the second connection block 232 and the transmission rod 21, reduce the installation difficulty, and can also improve the installation accuracy.

[0058] In one embodiment, the first connection assembly 22 further includes a first expansion sleeve 228, a first transmission hole 229 is further provided at one end of the first connection block 222, the first expansion sleeve 228 is arranged in the first transmission hole 229, and the main shaft 12 is installed in the first expansion sleeve 228; the second connection assembly 23 further includes a second expansion sleeve 238, a second transmission hole 239 is further provided at one end of the second connection block 232, the second expansion sleeve 238 is arranged in the second transmission block, and the first output shaft 31 is installed in the second expansion sleeve 238. The first expansion sleeve 228 is installed in the first transmission hole 229, and the first expansion sleeve 228 is also installed on the main shaft 12, so that the first connection block 222 and the main shaft 12 can be connected, and the connection strength is high. The second expansion sleeve 238 is installed in the second transmission hole 239, and the second expansion sleeve 238 is also installed on the first output shaft 31, so that the second connection block 232 and the first output shaft 31 can be connected, and the connection strength is high.

[0059] Please refer to Figures 10 to 12 In one embodiment, the driving mechanism 30 further includes a mounting seat 32 and a driving element 33; the driving element 33 is electrically connected to the first controller, the driving element 33 is arranged on the mounting seat 32, the driving element 33 includes a second output shaft 332, the end of the second output shaft 332 is provided with a connecting groove 3322, the end of the first output shaft 31 is provided with a connecting protrusion 312, the connecting protrusion 312 and the connecting groove 3322 are matched and connected, so that the first output shaft 31 and the second output shaft 332 are connected in transmission. The driving element 33 includes a motor, and the second output shaft 332 is the output shaft of the motor. In one embodiment, the driving element 33 further includes a reducer, the motor and the reducer are connected in transmission, and the second output shaft 332 is the output shaft of the reducer. Since the first output shaft 31 and the second output shaft 332 are connected in transmission through the connection protrusion 312 and the connecting groove 3322, it is convenient to maintain and repair the motor, the reducer, the first output shaft 31 and the second output shaft 332.

[0060] Please refer to Figure 13 and Figure 14In one embodiment, the driving mechanism 30 further includes a second limit block 34 and a second stopper 35; the two second stoppers 35 are arranged on the mounting seat 32, the second limit block 34 is arranged on the first output shaft 31, the two second stoppers 35 are located on both sides of the first output shaft 31, and the two second stoppers 35 are respectively located on the second rotation path of the second limit block 34 to limit the second limit block 34. When the first output shaft 31 controls the knife gate mechanism 10 to close, the first output shaft 31 rotates to the third limited position, at which time, one of the second stoppers 35 can block the second limit block 34, and can limit the first output shaft 31, thereby limiting the knife gate mechanism 10. When the first output shaft 31 controls the knife gate mechanism 10 to open, the second output shaft 332 rotates to the fourth limited position, at which time, another of the second stoppers 35 can block the second limit block 34, and can limit the first output shaft 31, thereby limiting the knife gate mechanism 10. By providing the second limiting block 34 and the second stopper 35 , the knife gate mechanism 10 can be further limited and the knife gate mechanism 10 can be further protected.

[0061] In one embodiment, the driving mechanism 30 further includes an auxiliary switch 36 and a connecting rod assembly 37, the auxiliary switch 36 is connected to the first output shaft 31 through the connecting rod assembly 37, and the auxiliary switch 36 is electrically connected to the first controller to obtain the closed state of the knife switch mechanism 10;

[0062] When the knife gate mechanism 10 is closed, the first output shaft 31 drives the auxiliary switch 36 to move to the first passage position through the connecting rod assembly 37, a circuit in the auxiliary switch 36 is connected, and feedback is given to the first controller, so that the first controller obtains the information that the knife gate mechanism 10 is closed. When the knife gate mechanism 10 is disconnected, the first output shaft 31 drives the auxiliary switch 36 to move to the second passage position through the connecting rod assembly 37, another circuit in the auxiliary switch 36 is connected, and feedback is given to the first controller, so that the first controller obtains the information that the knife gate mechanism 10 is disconnected. By setting the auxiliary switch 36 and the connecting rod assembly 37, the on-off state of the knife gate mechanism 10 can be obtained in time from another angle. Among them, the connecting rod assembly 37 can be a second four-bar linkage.

[0063] In one embodiment, the drive mechanism 30 further includes a first magnetic blowout switch 382, a second magnetic blowout switch 384, and a cam 39. The cam 39 is provided on the second output shaft 332. The first magnetic blowout switch 382 and the second magnetic blowout switch 384 are provided on the mounting base 32. The first magnetic blowout switch 382 and the second magnetic blowout switch 384 are respectively located on both sides of the cam 39 and on the third rotation path of the cam 39. The first magnetic blowout switch 382 and the second magnetic blowout switch 384 are respectively electrically connected to the first controller to control the rotation angle of the drive element 33. When the knife switch mechanism 10 is about to close, the first magnetic blowout switch 382 controls the drive element 33, the second output shaft 332, and the cam 39 to rotate in one direction through the first controller. When the cam 39 rotates to the fifth defined position, the knife switch mechanism 10 is completely closed. The cam 39 triggers the first magnetic blowout switch 382 to cut off the power of the first magnetic blowout switch 382. The first magnetic blowout switch 382 stops controlling the drive element 33, the second output shaft 332, and the cam 39 from continuing to rotate, thereby limiting the knife switch mechanism 10 and avoiding damage to the knife switch mechanism 10. When the knife switch mechanism 10 is about to open, the second magnetic blowout switch 384 controls the drive element 33, the second output shaft 332, and the cam 39 to rotate in the other direction through the first controller. When the cam 39 rotates to the sixth defined position, the knife switch mechanism 10 is completely opened. The cam 39 triggers the second magnetic blowout switch 384 to cut off the power of the second magnetic blowout switch 384. The second magnetic blowout switch 384 stops controlling the drive element 33, the second output shaft 332, and the cam 39 from continuing to rotate, thereby limiting the knife switch mechanism 10 and avoiding damage to the knife switch mechanism 10.

[0064] The above are only the preferred embodiments of the present invention, and do not limit the patent scope of the present invention. Any equivalent structural transformation made under the inventive concept of the present invention by using the content of the specification and drawings of the present invention, or directly / indirectly applied to other related technical fields, is included in the patent protection scope of the present invention.

Claims

1. A knife switch mechanism, characterized in that: It includes a knife gate base, a main shaft, a first crank and a second crank. The main shaft is rotatably arranged on the knife gate base. The first crank and the second crank are arranged on the main shaft. The first crank, the second crank and the main shaft are integrally formed.

2. The knife gate mechanism according to claim 1, characterized in that: The knife gate mechanism also includes a first limit block and a first stop block; The first limit block is arranged on the main shaft, and the two first stop blocks are arranged on the knife gate base and are located on both sides of the main shaft and on the first rotation path of the first limit block to limit the first limit block.

3. The knife gate mechanism according to claim 1, characterized in that: The knife gate mechanism also includes a fixing part, an opening is provided at one end of the knife gate base, a mounting hole is provided at the other end opposite to the knife gate base, the main shaft is rotatably mounted on the opening and the mounting hole, and the fixing part is arranged at the opening of the knife gate base so that the main shaft is confined within the opening.

4. A contact network grounding detection device, characterized in that: It comprises a transmission mechanism, a driving mechanism and the knife switch mechanism according to any one of claims 1 to 3, wherein the driving mechanism is connected to the main shaft through the transmission mechanism.

5. The contact network grounding detection device according to claim 4, characterized in that: Also includes a camera, a display screen and a first controller; The camera is used to monitor the knife switch mechanism, and the camera and the display screen are respectively connected to the first controller for communication.

6. The contact network grounding detection device according to claim 4, characterized in that: The driving mechanism comprises a first output shaft; The transmission mechanism includes a transmission rod, a first connecting component and a second connecting component. One end of the first connecting component is transmission-connected to the main shaft, and the other end is hingedly connected to the upper end of the transmission rod; one end of the second connecting component is transmission-connected to the first output shaft, and the other end is hingedly connected to the lower end of the transmission rod. The connection tightness between the first connecting component and the transmission rod and between the second connecting component and the transmission rod can be adjusted.

7. The contact network grounding detection device according to claim 6, characterized in that: The first connecting assembly comprises a first connecting block and a first latch, one end of the first connecting block is connected to the main shaft transmission, the other end of the first connecting block is provided with at least two first latch holes, the first latch is provided at one end of the transmission rod, the first latch is matched and connected with one of the first latch holes, so that the other end of the first connecting block is hingedly connected to one end of the transmission rod; The second connecting component includes a second connecting block and a second pin, one end of the second connecting block is drivingly connected to the first output shaft, the other end of the second connecting block is provided with at least two second pin holes, the second pin is arranged at one end of the transmission rod, and the second pin is cooperatively connected with one of the second pin holes so that the other end of the second connecting block is hingedly connected to the other end of the transmission rod.

8. The contact network grounding detection device according to claim 7, characterized in that: The first connection assembly further includes a first expansion sleeve, a first transmission hole is further formed at one end of the first connection block, the first expansion sleeve is arranged in the first transmission hole, and the main shaft is installed in the first expansion sleeve; The second connection assembly further includes a second expansion sleeve. A second transmission hole is further formed at one end of the second connection block. The second expansion sleeve is arranged in the second transmission hole. The first output shaft is installed in the second expansion sleeve.

9. The contact network grounding detection device according to claim 6, characterized in that: It also includes a camera, a display screen and a first controller; the driving mechanism also includes a mounting seat, a driving element, a second limit block and a second stop block; The driving element is electrically connected to the first controller, the driving element and the two second stoppers are arranged on the mounting seat, the driving element comprises a second output shaft, a connecting groove is provided at the end of the second output shaft, a connecting protrusion is provided at the end of the first output shaft, the connecting protrusion is matched and connected with the connecting groove, so that the first output shaft and the second output shaft are connected in driving manner; The second limit block is arranged on the first output shaft, and two second limit blocks are located on both sides of the first output shaft. The two second limit blocks are respectively located on the second rotation path of the second limit block to limit the second limit block.

10. The contact network grounding detection device according to claim 9, characterized in that: The driving mechanism further includes an auxiliary switch, a first magnetic blow switch, a second magnetic blow switch, a cam and a connecting rod assembly, wherein the auxiliary switch is connected to the first output shaft through the connecting rod assembly, and the auxiliary switch is electrically connected to the first controller to obtain the closed state of the knife switch mechanism; The cam is arranged on the second output shaft, the first magnetic blow switch and the second magnetic blow switch are arranged on the mounting seat, the first magnetic blow switch and the second magnetic blow switch are respectively located on both sides of the cam and on the third rotation path of the cam, and the first magnetic blow switch and the second magnetic blow switch are respectively electrically connected to the first controller to control the rotation angle of the driving element.

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