Drawer seat position signal device

Abstract

The utility model discloses a drawer seat position signal device which comprises a transmission assembly, a signal line assembly and a position lock assembly. The signal line assembly and the position lock assembly are arranged on the left side and the right side of the transmission assembly respectively. The transmission assembly comprises a hoop shell, and a supporting plate is connected into the hoop shell in a driving mode through a lead screw. An ejector rod is arranged on the side, close to the signal line assembly, of the supporting plate. The signal line assembly comprises a U-shaped support, the U-shaped support comprises a switch installation plate on the upper layer and a connection plate on the lower layer, a connection switch, a test switch and a separation switch are installed on the switch installation plate, and protruding contacts are arranged on the sides, facing the transmission assembly, of the connection switch, the test switch and the separation switch. The ejector rod is in sliding contact with the contact on the moving path; according to the utility model, the problem that three-position signal transmission is affected due to large transmission clearance caused by the fact that the drawer seat is rocked in and out is effectively solved, and safety accidents caused by failure of signal transmission are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of the installation structure of a circuit breaker drawer seat, in particular to a position signal device for a drawer seat. Background Art

[0002] As an important part of the low-voltage power distribution system, the accurate detection and transmission of the position signal of a drawer-type circuit breaker are of great significance for ensuring the safe operation and maintenance of equipment.

[0003] The position signal of the drawer seat is usually used to indicate the working state of the circuit breaker in the cabinet, including "connected position" (working position), "test position" (testing position), "disconnected position" (withdrawal position), and "moving position", etc. The accurate detection of these positions can help the operation and maintenance personnel judge whether the circuit breaker is in a safe operating state and avoid safety accidents caused by misoperation.

[0004] Technically, the detection of the drawer seat position signal mainly relies on devices such as mechanical micro switches, proximity switches, or photoelectric sensors. These sensors detect specific positions or marks on the drawer seat slide rail and convert mechanical displacement into an electrical signal. For example, when the drawer seat slides into the "connected position", the mechanical contact closes and a signal is sent; when the drawer seat moves to the "test position" or "disconnected position", the sensor will trigger the corresponding status signal. In recent years, with the development of non-contact detection technology, the application of proximity switches and photoelectric sensors has gradually increased due to their long service life and high reliability.

[0005] The transmission of the position signal is usually achieved through hard wiring or a communication bus. The traditional method uses hard wiring to connect the signal to the control loop or monitoring system, which has the advantages of fast response speed and strong anti-interference ability. In an intelligent power distribution system, the drawer seat position signal is increasingly transmitted through a communication bus (such as Modbus, Profibus, etc.) to achieve integration with the upper computer or SCADA system, facilitating remote monitoring and status management.

[0006] In addition, the processing and system integration of the drawer seat position signal are also important links in the technical background. Modern low-voltage power distribution systems require that the drawer seat position signal be used not only for local indication but also for linkage with the circuit breaker operating mechanism, interlock device, and protection system. For example, when the drawer seat is in the "moving position", the system will automatically lock the circuit breaker operation to prevent live operation; when the drawer seat has not fully reached the "connected position", the system will send an alarm signal to prompt the operation and maintenance personnel to check.

[0007] With the development of intelligent technologies, the detection and transmission of drawer position signals are moving towards digitalization and networking. By connecting the position signals to an intelligent power distribution management system and combining them with IoT and big data analytics, remote status monitoring, fault diagnosis, and operation and maintenance optimization of drawer-type circuit breakers can be achieved, further improving the safety and reliability of low-voltage power distribution systems.

[0008] The existing technology has a defect: after repeated rocking in and out, the mechanical transmission gap inside the drawer seat may increase, causing the three positions to be inaccurate and unable to correctly transmit the position status, thus posing a safety hazard to the operator. Utility Model Content

[0009] The technical problem to be solved by this utility model is to provide an improved drawer seat position signal device in order to overcome the shortcomings of the existing technology.

[0010] The technical solution adopted by this utility model to solve its technical problem is: a drawer seat position signal device, including a transmission component and a signal line component and a position lock component respectively disposed on the left and right sides of the transmission component; the signal line component and the position lock component are electrically connected to the external control terminal of the transmission component.

[0011] The transmission assembly includes a clamp housing, and a support plate is connected inside the clamp housing via a lead screw; a top rod is provided on the side of the support plate near the signal line assembly;

[0012] The signal line assembly includes a U-shaped bracket, which includes an upper switch mounting plate and a lower connecting plate. The switch mounting plate is equipped with a connection switch, a test switch, and a disconnect switch. Each of the connection switch, test switch, and disconnect switch has a raised contact on the side facing the transmission assembly, and the push rod slides in contact with the contact on the moving path.

[0013] The position lock assembly includes a position lock and a latch, one end of which is fixedly mounted on the position lock and the other end of which is snapped onto the tray.

[0014] Furthermore, the clamp housing of this utility model is provided with reserved elongated holes on the left and right sides for the top rod and the fastener to move.

[0015] Furthermore, the connection switch and disconnect switch of this utility model are installed on the upper surface of the switch mounting plate, and the test switch is installed on the lower surface of the switch mounting plate;

[0016] By adopting the above technical solution, the three position switches are placed on the U-shaped surface of the bracket, so that the contact switch position is higher and the contact with the top rod is more reliable and effective.

[0017] Furthermore, the end faces of the contact points and the contact rods of this utility model are both arc-shaped structures.

[0018] By adopting the above technical solution, while achieving sliding contact, the contact surface of the top rod can be widened to make the contact surface with the switch contact larger and more stable.

[0019] Furthermore, the assembly holes of the connecting plate and the clamp housing on the U-shaped bracket of this utility model, and the assembly holes of the connecting switch and the switch mounting plate are all oblong holes.

[0020] By adopting the above technical solutions, we can accommodate more customer needs.

[0021] The beneficial effects of this utility model are: 1. The drawer seat position signal device of this utility model effectively solves the problem of large transmission gap caused by the drawer seat rocking in and out, which affects the transmission of three-position signals and reduces safety accidents caused by signal transmission failure; 2. The contact distance of the drawer seat position signal can be adjusted to meet the different needs of customers, making it suitable for more customers and improving its versatility and adaptability; 3. It supports quick disassembly and assembly, which is convenient for maintenance and replacement and reduces the maintenance cost for customers. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the structure of this utility model;

[0024] Figure 2 This is a schematic diagram of the transmission component in this utility model;

[0025] Figure 3 This is a schematic diagram of the signal line assembly in this utility model;

[0026] Figure 4 This is a schematic diagram illustrating the connection structure between the signal line assembly, the position lock assembly, and the tray in this utility model.

[0027] The following are the labels in the diagram: 1. Transmission assembly, 11. Clamp housing, 12. Lead screw, 13. Support plate, 14. Top rod, 15. Reserved elongated hole, 2. Signal line assembly, 21. Switch mounting plate, 22. Connecting plate, 23. Connecting switch, 24. Test switch, 25. Disconnecting switch, 26. Contact, 27. Assembly hole, 3. Position lock assembly, 31. Position lock, 32. Fastener. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0029] like Figures 1-4 The drawer seat position signal device shown includes a transmission assembly 1 and signal line assemblies 2 and position lock assemblies 3 respectively disposed on the left and right sides of the transmission assembly 1; the signal line assemblies 2 and position lock assemblies 3 are electrically connected to the external control terminal of the transmission assembly 1.

[0030] The transmission assembly 1 includes a clamp housing 11, and a support plate 13 is driven and connected inside the clamp housing 11 via a lead screw 12; a push rod 14 is provided on the side of the support plate 13 near the signal line assembly 2;

[0031] The signal line assembly 2 includes a U-shaped bracket, which includes an upper switch mounting plate 21 and a lower connecting plate 22. The switch mounting plate 21 is equipped with a connecting switch 23, a test switch 24 and a disconnect switch 25. The connecting switch 23, the test switch 24 and the disconnect switch 25 are all provided with protruding contacts 26 on the side facing the transmission assembly 1, and the push rod 14 slides in contact with the contacts 26 on the movement path.

[0032] The position lock assembly 3 includes a position lock 31 and a latch 32. One end of the latch 32 is fixedly installed on the position lock 31, and the other end of the latch 32 is snapped onto the tray 13.

[0033] The clamp housing 11 has pre-drilled elongated holes 15 on its left and right sides for the movement of the top rod 14 and the fastener 32. The connecting switch 23 and the disconnecting switch 25 are mounted on the upper surface of the switch mounting plate 21, and the test switch 24 is mounted on the lower surface of the switch mounting plate 21. The end faces of the contacts 26 and the top rod 14 that interact with each other are both arc-shaped.

[0034] The mounting holes 27 of the connecting plate 22 on the U-shaped bracket and the clamp housing 11, and the mounting holes of the connecting switch 23 and the switch mounting plate 21 are all oblong holes.

[0035] Working principle and operation description:

[0036] In the initial position, the push rod contacts the contact of the disconnect switch, triggering a signal indicating that the product is in the disconnected position. A clockwise rotational force is applied to the lead screw, causing the pallet to move in the Z direction. When the pallet reaches the test position, the position lock assembly controls the movement to stop. This position is the forward 1 position. When the pallet is in the test position, the push rod contacts the contact of the test switch, sending a test signal. A clockwise rotational force continues to be applied to the lead screw. When the pallet reaches the connection position, the position lock controls the lead screw to stop rotating. This position is the forward 2 position. The push rod contacts the contact of the connection switch, sending a connection signal.

[0037] A counterclockwise rotational force is applied to the lead screw, causing the pallet to move in the X direction. When the pallet reaches the test position, the position lock controls the lead screw to stop rotating. Due to the load and transmission clearance issues, the pallet does not reach the test position as it does in position 1. At this time, the push rod contacts the test switch, and a counterclockwise rotational force is continued to be applied, causing the pallet to move in the X direction. When the pallet reaches the separation position, the position lock controls the lead screw to stop rotating. At this time, the push rod contacts the contact of the separation switch, sending a separation signal.

[0038] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A drawer seat position signal device, characterized in that: It includes a transmission assembly (1) and signal line assemblies (2) and position lock assemblies (3) respectively disposed on the left and right sides of the transmission assembly (1); the signal line assemblies (2) and position lock assemblies (3) are electrically connected to the external control terminal of the transmission assembly (1); The transmission assembly (1) includes a clamp housing (11), and a support plate (13) is driven and connected inside the clamp housing (11) by a lead screw (12); a top rod (14) is provided on the side of the support plate (13) near the signal line assembly (2); The signal line assembly (2) includes a U-shaped bracket, which includes an upper switch mounting plate (21) and a lower connecting plate (22). The switch mounting plate (21) is equipped with a connection switch (23), a test switch (24) and a disconnect switch (25). The connection switch (23), the test switch (24) and the disconnect switch (25) are all provided with protruding contacts (26) on the side facing the transmission assembly (1), and the push rod (14) slides in contact with the contacts (26) on the moving path. The position lock assembly (3) includes a position lock (31) and a latch (32). One end of the latch (32) is fixedly installed on the position lock (31), and the other end of the latch (32) is snapped onto the tray (13).

2. The drawer seat position signal device as described in claim 1, characterized in that: The clamp housing (11) is provided with reserved elongated holes (15) on the left and right sides for the top rod (14) and the fastener (32) to move.

3. The drawer seat position signal device as described in claim 1, characterized in that: The connection switch (23) and disconnect switch (25) are mounted on the upper surface of the switch mounting plate (21), and the test switch (24) is mounted on the lower surface of the switch mounting plate (21).

4. The drawer seat position signal device as described in claim 1, characterized in that: The contact point (26) and the end face of the contact rod (14) are both arc-shaped.

5. The drawer seat position signal device as described in claim 1, characterized in that: The mounting holes (27) of the connecting plate (22) on the U-shaped bracket and the clamp housing (11), and the mounting holes of the connecting switch (23) and the switch mounting plate (21) are all oblong holes.

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