Manual operation locking mechanism of rail transit visual grounding device

Abstract

The utility model discloses a manual operation locking mechanism of a rail transit visual grounding device, which belongs to the technical field of rail transit and comprises an electromagnetic lock, an operation hole baffle and a grounding switch mechanism. The grounding switch mechanism is installed in the high-voltage chamber. The electromagnetic lock is installed on a high-voltage chamber door and is movably connected with one end of the operation hole baffle plate. The other end of the operation hole baffle is located at the position of the manual operation hole and used for shielding or releasing the manual operation hole. And the swing passes through the released manual operation hole and is inserted into the grounding switch mechanism so as to complete the switching-on or switching-off operation of the grounding switch mechanism. According to the utility model, the manual operation state of the grounding device can be monitored in real time, other electric operation is locked, and the manual operation is allowed only when the manual operation condition is met, thereby effectively solving the problems that the manual operation of the existing grounding device has the risk of closing a grounding switch in a live-line manner, the electric operation and the manual operation are carried out simultaneously, and the working efficiency is high. And personal safety accidents are caused.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of rail transit, specifically relates to a rail transit visual grounding device manual operation locking mechanism. BACKGROUND

[0002] Visual grounding device is often applied in DC1500V urban rail transit, replaces manual work when the line is powered off for maintenance, and realizes automatic hanging and dismounting of ground wire function.

[0003] The application of visual grounding device indeed brings a lot of convenience to operating personnel, but there is still the problem of insufficient safety protection in manual operation of the existing grounding device.

[0004] The grounding switch of the visual grounding device is arranged in a high-voltage chamber, the high-voltage chamber door is provided with a manual operation hole, the manual operation hole is generally managed by a mechanical padlock, when manual operation is needed, the operating personnel uses a mechanical key to open the mechanical padlock, inserts a swing, and manually operates the grounding switch to open or close, this operation mode has the following risks:

[0005] 1) Before the swing is inserted for manual operation, it is entirely relied on management measures for constraint, there is no technical limiting measure to monitor whether the insertion condition is met (such as whether the high-voltage chamber is electrified, whether the on-line disconnecting switch is locked, etc.), and there is a risk of electrified grounding switch.

[0006] 2) After the swing is inserted for manual operation, the grounding device controller does not know the manual operation state, there may be a situation that electric operation and manual operation are simultaneously performed, leading to personal safety accidents. INVENTION CONTENTS

[0007] The utility model aims at the above-mentioned deficiencies in the prior art, and provides a rail transit visual grounding device manual operation locking mechanism, to solve the problems of electrified grounding switch risk in the prior art, and the situation that electric operation and manual operation are simultaneously performed, leading to personal safety accidents.

[0008] To achieve the above-mentioned purpose, the utility model adopts the technical scheme that:

[0009] A rail transit visual grounding device manual operation locking mechanism, comprising an electromagnetic lock, an operation hole baffle and a grounding switch mechanism;

[0010] The grounding switch mechanism is installed in a high-voltage chamber, the electromagnetic lock is installed on the high-voltage chamber door and movably connected with one end of the operation hole baffle, the other end of the operation hole baffle is located at the position of the manual operation hole, for shielding or releasing the manual operation hole, the swing passes through the released manual operation hole and is inserted into the grounding switch mechanism, to complete the closing or opening operation of the grounding switch mechanism.

[0011] Further, one end of an electromagnetic lock connecting rod on the electromagnetic lock is connected with a first crank on a first stroke switch; the other end of the electromagnetic lock connecting rod is connected with one end of an operating hole baffle; the first stroke switch is arranged on the high-voltage chamber door.

[0012] Further, the operating hole baffle is arranged on the high-voltage chamber door through a baffle rotating shaft; the electromagnetic lock connecting rod drives the operating hole baffle to rotate left and right along the baffle rotating shaft, so as to release or shield the manual operating hole.

[0013] Further, the grounding switch mechanism comprises a speed reducer, a second stroke switch and a grounding knife switch.

[0014] The second stroke switch is arranged below an operating sleeve, and the upper part of the second stroke switch passes through the operating sleeve; the operating sleeve is located at the position of the input shaft of the speed reducer; the swing insertion is connected with the input shaft of the speed reducer after top opening the second stroke switch in the operating sleeve; the output shaft of the speed reducer is connected with a driving shaft through a worm gear; the side end of the driving shaft is provided with a second crank, and the second crank is connected with the grounding knife switch through a contact connecting rod.

[0015] Further, the input shaft of the speed reducer is connected with the output shaft of a driving motor.

[0016] Further, the speed reducer is mounted on a bottom plate, and the bottom plate is fixed in the high-voltage chamber through bolts.

[0017] Further, one end of the contact connecting rod is connected with the grounding knife switch; the grounding knife switch is fixed on a moving contact through a knife switch rotating shaft, and the opposite end of the moving contact is a static contact; the driving shaft drives the contact connecting rod to rotate up and down, and then drives the grounding knife switch and the static contact to operate in the closing or opening mode.

[0018] Further, the side end of the driving shaft is connected with one end of an auxiliary contact connecting rod, and the other end of the auxiliary contact connecting rod is connected with an auxiliary contact rotating shaft on an auxiliary contact assembly.

[0019] The manual operation locking mechanism of the visual grounding device for rail transit has the following advantages

[0020] Beneficial effects:

[0021] The manual operation locking mechanism of the visual grounding device for rail transit can monitor the manual operation state of the grounding device in real time, and lock other electric operations; only when the manual operation conditions are met (for example, the overhead line system is not electrified, and the on-line disconnector is not closed), the manual operation is allowed, the risk of electrified grounding switch during manual operation of the existing grounding device is effectively solved, and the problem that the electric operation and the manual operation are simultaneously performed, resulting in personal safety accidents, is solved. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 High voltage chamber door and grounding switch mechanism diagram of manual operation locking mechanism of the rail transit visualized grounding device.

[0023] Figure 2 Front view of high voltage chamber door of manual operation locking mechanism of the rail transit visualized grounding device.

[0024] Figure 3 Back view of high voltage chamber door of manual operation locking mechanism of the rail transit visualized grounding device.

[0025] Figure 4 Grounding switch mechanism diagram of manual operation locking mechanism of the rail transit visualized grounding device.

[0026] Figure 5 Circuit control diagram of manual operation locking mechanism of the rail transit visualized grounding device.

[0027] Figure 6 Electrical control principle diagram of the rail transit visualized grounding device.

[0028] Figure 7 Open and close process diagram of manual operation locking mechanism of the rail transit visualized grounding device.

[0029] Figure 8 Controller KZQ remote communication input control circuit one of the rail transit visualized grounding device.

[0030] Figure 9 Controller KZQ remote communication input control circuit two of the rail transit visualized grounding device.

[0031] Wherein, 1, handle; 2, unlocking key; 3, power indicator light; 4, mechanical key hole; 5, electromagnetic lock; 6, manual operation hole; 7, operation hole baffle; 8, baffle rotating shaft; 9, electromagnetic lock connecting rod; 10, first crank arm; 11, first travel switch; 12, high voltage chamber door; 13, crank handle; 14, grounding switch mechanism; 15, auxiliary contact connecting rod; 16, auxiliary contact rotating shaft; 17, auxiliary contact assembly; 18, drive shaft; 19, second crank arm; 20, operation sleeve; 21, worm gear; 22, speed reducer; 23, drive motor; 24, chassis; 25, second travel switch; 26, static contact; 27, contact connecting rod; 28, grounding knife switch; 29, knife switch rotating shaft. DETAILED DESCRIPTION

[0032] The specific embodiments of this utility model are described below to enable those skilled in the art to understand this utility model. However, it should be understood that this utility model is not limited to the scope of the specific embodiments. For those skilled in the art, as long as various changes are within the spirit and scope of this utility model as defined and determined by the appended claims, these changes are obvious. All utility model creations utilizing the concept of this utility model are within the scope of protection.

[0033] Example 1

[0034] This embodiment provides a manual operation interlocking mechanism for a visual grounding device for rail transit, referencing... Figures 1-4 It includes an electromagnetic lock 5, an operating hole baffle 7 and a grounding switch mechanism 14, which are installed on the visual grounding device;

[0035] The grounding switch mechanism 14 is installed in the high-voltage room, and the electromagnetic lock 5 is installed on the high-voltage room door 12 and is movably connected to one end of the operating hole baffle 7. The other end of the operating hole baffle 7 is located at the manual operating hole 6. During specific operations, it is used to block or release the manual operating hole 6. During manual operation, the operator swings the switch through the released manual operating hole 6 and inserts it into the grounding switch mechanism 14, swinging left and right to complete the closing or opening operation of the grounding switch mechanism 14.

[0036] Specifically, in this embodiment, the preferred electromagnetic lock 5 is model DSN-AMZ (DC220V), which is installed on the high-voltage chamber door 12. As prior art, the electromagnetic lock 5 is equipped with a lever 1, an unlocking button 2, a power indicator light 3, a mechanical keyhole 4, and an electromagnetic lock linkage 9. One end of the electromagnetic lock linkage 9 is connected to the first crank arm 10 on the first limit switch 11, and the other end is connected to one end of the operating hole baffle 7. The first limit switch 11 is located on the high-voltage chamber door 12. The operating hole baffle 7 is mounted on the high-voltage chamber door 12 via a baffle rotation shaft 8. The electromagnetic lock linkage 9 drives the operating hole baffle 7 to rotate left and right along the baffle rotation shaft 8 to release or block the manual operation hole 6.

[0037] In actual operation, the operator holds down the unlock button 2 with one hand and moves the lever 1 to the left with the other hand. The lever 1 pushes the electromagnetic lock linkage 9 to move, which in turn drives the operating hole baffle 7 to rotate around the baffle rotation axis 8, so that the operating hole baffle 7 is separated from the manual operating hole 6 and the manual operating hole 6 is opened.

[0038] It should be noted that the lever 1, unlocking button 2, power indicator light 3, mechanical keyhole 4, and electromagnetic lock linkage 9 in this embodiment are all structures of the electromagnetic lock 5DSN-AMZ (DC220V) itself, so their connection relationship and working principle will not be described in detail.

[0039] The grounding switch mechanism 14 comprises a speed reducer 22, a second stroke switch 25, a grounding knife switch 28, an auxiliary contact assembly 17, a worm gear 21 and a driving motor 23.

[0040] The second stroke switch 25 is arranged below the operating sleeve 20, and the upper part of the second stroke switch 25 penetrates through the operating sleeve 20. The operating sleeve 20 is located at the position of the input shaft of the speed reducer 22. When the rocking plug is inserted into the operating sleeve 20, the upper part of the second stroke switch 25 will be pressed and contacted, thereby pushing the second stroke switch 25 and connecting the input shaft of the speed reducer 22. The connection mode between the rocking plug 13 and the input shaft of the speed reducer 22 is not limited in the embodiment, which can be a shaft coupling or other connection modes.

[0041] The speed reducer 22 is installed on the base plate 24 and fixed to the high-pressure chamber by bolts. The output shaft of the speed reducer 22 is connected with the driving shaft 18 through the worm gear 21. The output shaft is connected with the worm gear 21 through a shaft coupling. The driving shaft 18 is connected with the grounding knife switch 28 through the second crank arm 19 and the contact connecting rod 27. Specifically, one end of the driving shaft 18 is connected with the worm gear 21. The other end of the driving shaft 18 is connected with the second crank arm 19. The second crank arm 19 is movably connected with one end of the contact connecting rod 27. The other end of the contact connecting rod 27 extends downward and is connected with the grounding knife switch 28. The grounding knife switch 28 is fixed to the moving contact through the knife switch rotating shaft 29. The opposite end of the moving contact is the static contact 26.

[0042] The driving shaft 18 drives the contact connecting rod 27 to rotate up and down around the knife switch rotating shaft 29, thereby driving the grounding knife switch 28 and the static contact 26 to close or open. Figure 4 As shown in the figure, when the grounding knife switch 28 and the static contact 26 are located in the same horizontal plane, the state is that the grounding knife switch 28 and the static contact 26 are in contact, which is the closing state. Conversely, when the grounding knife switch 28 and the static contact 26 are not in contact, it is the opening state.

[0043] As a preferred embodiment, the side end of the driving shaft 18 is connected with one end of the auxiliary contact connecting rod 15. The other end of the auxiliary contact connecting rod 15 is connected with the auxiliary contact rotating shaft 16 of the auxiliary contact assembly 17. During the specific operation, when the driving shaft 18 drives the grounding knife switch 28 to contact and close the static contact 26, the process corresponds to the closing position stroke switch 1XK in Figure 5 At the same time, the driving shaft 18 drives the auxiliary contact rotating shaft 16 to rotate to the corresponding position through the auxiliary contact connecting rod 15. At this time, the circuit in Figure 5 correspondingly outputs the closed contact signal.

[0044] Similarly, when the grounding knife switch 28 and the static contact 26 are in contact and open, the process corresponds to the opening position stroke switch 1XO in Figure 5The circuit outputs the disconnection contact signal when the opening position travel switch 2XK in the circuit is closed, and outputs the corresponding signal through the auxiliary contact assembly 17.

[0045] As a preferred embodiment of the present application, the speed reducer 22 can be a multi-shaft speed reducer 22, which can have multiple input shafts. In this embodiment, the output shaft of the driving motor 23 is connected to the input shaft of the speed reducer 22, so that the driving motor 23 can drive the speed reducer 22 and the driving shaft 18, thereby realizing the entire opening and closing operation and outputting the corresponding signal.

[0046] The working principle of the manual operation locking mechanism of the rail transit visual grounding device of the present application is described with reference to Figure 5 、 Figure 6 and Figure 7 as follows:

[0047] (1) Referring to Figure 5 , rotate the grounding device operation mode switch SA1 to the manual operation position. The grounding device controller checks whether the manual operation conditions are met (the catenary is not electrified, and the on-net grounding switch locking signal is invalid). If the manual operation conditions are met, the grounding device controller outputs a control signal to close the electromagnetic lock 5 power supply on the grounding device high-voltage chamber cabinet door, and the power supply indicator light 3 of the electromagnetic lock 5 is bright red.

[0048] In this process, the catenary electricity test is performed by installing a DC circuit transmitter TA on the catenary in the warehouse. The DC 0-4000A current signal is converted into a 4-20mA current signal based on the circuit transmitter TA, which is sent to the controller KZQ, and then the presence or absence of electricity in the catenary is obtained.

[0049] (2) The operator presses the unlocking key 2 with one hand and turns the handle 1 to the left with the other hand. The handle 1 pushes the electromagnetic lock connecting rod 9 to move to the left, thereby driving the operation hole baffle 7 to rotate around the baffle rotating shaft 8, causing the operation hole baffle 7 to separate from the manual operation hole 6 and open the manual operation hole 6.

[0050] Referring to Figure 8 and Figure 9 , the first travel switch output signal is connected to the electromagnetic lock access switch SQ4 in the remote signaling input of the controller KZQ. During the actual operation, when the handle is turned to the left, the electromagnetic lock connecting rod 9 pushes the first crank arm 10 on the first travel switch 11 to move, causing the first travel switch 11 to act and output a signal to the grounding device controller KZQ, which prevents accidents by locking other electric operations of the grounding device.

[0051] (3) The operator inserts the rocking plug into the manual operation sleeve 20, pushes open the second travel switch 25, and connects it to the input shaft of the speed reducer 22. When the second travel switch 25 is pushed open, theFigure 5 The position of the contact 21-22 of the travel switch XK in the circuit is top open, which disconnects the circuit and realizes the purpose of protecting manual operation;

[0052] The swing is inserted into the manual operation sleeve 20 and connected with the input shaft of the speed reducer motor. When the swing rotates left and right, the speed reducer motor is driven to rotate, the rotation direction is converted through the worm gear, and the driving shaft 18 is driven to rotate. The driving shaft 18 further drives the second crank arm 19 to move. The second crank arm 19 is connected with the grounding knife switch 28 through the contact connecting rod 27. When the driving shaft 18 rotates, the grounding knife switch 28 moves up and down around the knife switch rotating shaft 29 to realize the opening and closing function of the grounding switch. At the same time, the auxiliary contact rotating shaft 16 is driven to rotate, and the corresponding contact signal is output.

[0053] (4) After the operation is completed, the operator pulls out the swing and pushes the handle to the right to close the manual operation hole 6, and the manual operation process is completed.

[0054] The model of part of the electrical elements involved in this embodiment or the drawings is as follows:

[0055] Electromagnetic lock DSN: DSN-AMZ (DC220V)

[0056] Travel switch: SK-IIB

[0057] Controller KZQ: HY-WCK02

[0058] Switch SA1: LW39-16CU-9GC-232X / 4

[0059] Switch SA2: LW39-16C-9OB-33X3P

[0060] Intermediate relay: SR2HLD-D24

[0061] Although the specific embodiments of the utility model are described in detail in combination with the drawings, it should not be understood as limiting the protection scope of the patent. Various modifications and changes made by those skilled in the art within the scope described in the claims are still within the protection scope of the patent.

Claims

1. A manually operated interlocking mechanism for a visual grounding device for rail transit, characterized in that: Includes an electromagnetic lock, an operating hole baffle, and a grounding switch mechanism; The grounding switch mechanism is installed in the high-voltage room, and the electromagnetic lock is installed on the high-voltage room door and movably connected to one end of the operating hole baffle; the other end of the operating hole baffle is located at the manual operating hole position, used to block or release the manual operating hole; the switch swings through the released manual operating hole and inserts into the grounding switch mechanism to complete the closing or opening operation of the grounding switch mechanism.

2. The manual operation interlocking mechanism of the rail transit visual grounding device according to claim 1, characterized in that: One end of the electromagnetic lock linkage on the electromagnetic lock is connected to the first crank arm on the first limit switch; the other end of the electromagnetic lock linkage is connected to one end of the operating hole baffle; the first limit switch is located on the high-pressure chamber door.

3. The manual operation interlocking mechanism of the rail transit visual grounding device according to claim 2, characterized in that: The operating hole baffle is mounted on the high-pressure chamber door via a baffle rotation shaft; the electromagnetic lock linkage drives the operating hole baffle to rotate left and right along the baffle rotation shaft to release or block the manual operating hole.

4. The manual operation interlocking mechanism of the rail transit visual grounding device according to claim 1, characterized in that: The grounding switch mechanism includes a speed reducer, a second limit switch, and a grounding knife switch; The second limit switch is located below the operating sleeve, and the upper part of the second limit switch passes through the operating sleeve; the operating sleeve is located at the input shaft of the reducer; the swing insert is inserted into the operating sleeve to open the second limit switch and then connects to the input shaft of the reducer; the output shaft of the reducer is connected to the drive shaft through a worm gear; the side end of the drive shaft is provided with a second crank arm, and the second crank arm is connected to the grounding switch through a contact connecting rod.

5. The manual operation interlocking mechanism of the rail transit visual grounding device according to claim 4, characterized in that: The input shaft of the reducer is connected to the output shaft of the drive motor.

6. The manual operation interlocking mechanism of the rail transit visual grounding device according to claim 4, characterized in that: The reducer is mounted on the chassis, and the chassis is fixed to the high-pressure chamber by bolts.

7. The manual operation interlocking mechanism of the rail transit visual grounding device according to claim 4, characterized in that: One end of the contact link is connected to the grounding switch; the grounding switch is fixed to the moving contact via the switch rotation shaft, and the opposite end of the moving contact is the stationary contact; the drive shaft drives the contact link to rotate up and down, thereby driving the grounding switch and the stationary contact to close or open.

8. The manual operation interlocking mechanism of the rail transit visual grounding device according to claim 4, characterized in that: One end of the drive shaft is connected to one end of the auxiliary contact link, and the other end of the auxiliary contact link is connected to the auxiliary contact rotating shaft on the auxiliary contact assembly.

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