Terminal block test connection device

Abstract

The present invention relates to cable testing of a terminal block, and in particular to a terminal block test connection device to solve the problem of inconvenient wiring of the terminal block during testing and affecting work efficiency. The terminal block test connection device includes a device body, on which a conductive contact piece is provided for inserting into a plug-in port on the terminal block and pressing against a power terminal in the plug-in port. The device body is also provided with a fixed arm for fixing the device body and a connection terminal for connecting a test cable. The fixed arm is provided with a detachable connection structure for detachably fixing to the terminal block or a circuit board fixed to the terminal block, and the connection terminal is conductively connected to the conductive contact piece. The above device does not require operation of the terminal block for wiring, so wiring is convenient, which is conducive to improving work efficiency.

Description

Technical Field

[0001] The invention relates to cable testing of a wiring terminal block, and in particular to a wiring terminal block testing connection device. Background Art

[0002] DCS is the abbreviation of Distributed Control System, which is a new type of computer control system compared to the centralized control system. It is also called a distributed control system in the domestic automatic control industry. In some special control fields, such as nuclear power plant control systems, DCS is also called a digital control system, but its essence is still a distributed control system.

[0003] At present, in the DCS power switching test of power plants, wires are generally connected to the terminal block. Because there is no dedicated lead-out wire on the terminal block, it is necessary to connect the lead-out wire to the power terminal of the terminal block to measure the power voltage of different levels. One end of the lead-out wire is connected to the corresponding power terminal on the terminal block, and the other end is connected to the alligator clip. The double-layer screw-free spring terminal block is a commonly used terminal block. Its structure is as follows: Figure 1 — Figure 2 As shown, this terminal block 9 is divided into two layers, upper and lower, forming a step structure, each layer includes two rows of holes, one row of holes is a plug-in port 10 for inserting lead wires or signal wires and other cables, and the other row of holes is a spring-clip screw-in port 11 for operating the spring. When fixing the lead wires during testing or the signal wires during use, this terminal block does not need to tighten the screws, but needs to insert a flat-blade screwdriver into the spring-clip screw-in port to open the connection port, and then insert the cable into the connection port. After the cable is inserted into place, pull out the screwdriver, the spring resets and fixes the cable by its own elastic force.

[0004] In actual wiring work, a flat-blade screwdriver is generally used to operate the wiring work. However, this terminal block is generally installed on the circuit board 8 for distributing power. If too much force is used, the circuit board will be damaged and the equipment will be damaged. If too little force is used, the wiring port on the terminal block cannot be opened smoothly. In addition, since the distance between the terminal block and the wiring groove of the cable is very close, the space for using the screwdriver is limited. Sometimes improper force will injure the hands of the staff, making it impossible to complete the work smoothly. The operation is very inconvenient, which will seriously affect the work efficiency and thus affect the progress of the entire work. Furthermore, there are multiple voltage levels on the terminal board, such as +5VDC, -15VDC, +15VDC, +24VDC, +48VDC and other 5 voltage levels. Because each terminal is close to each other and the terminals are in two layers, it is easy to cause a short circuit between two power lines during the wiring process. Once a short circuit occurs, the power distribution circuit board will be burned. In severe cases, the corresponding card will be burned, causing an accident. Summary of the invention

[0005] The purpose of the present invention is to provide a terminal block test connection device to solve the problem that the terminal block wiring is inconvenient and affects the work efficiency during testing.

[0006] To achieve the above-mentioned purpose, the technical solution adopted in the present invention is: a terminal block test connection device, including a device body, the device body is provided with a conductive contact piece for inserting into the wire socket on the terminal block and pressing against the power terminal in the wire socket, the device body is also provided with a fixing arm for fixing the device body and a connecting terminal for connecting a test cable, the fixing arm is provided with a detachable connecting structure for detachably fixing to the terminal block or a circuit board for fixing the terminal block, and the connecting terminal is conductively connected to the conductive contact piece.

[0007] The conductive contacts are arranged in a step-like manner to match the power terminals arranged in a step-like manner on the terminal block.

[0008] One side of the device body on which the conductive contact piece is provided is a step structure, and the step structure is used to match the shape of the step surface of the wiring terminal row on which the power terminal is provided.

[0009] The top and bottom ends of the step structure are respectively provided with positioning surfaces for pressing onto the wiring terminal row or the circuit board.

[0010] The conductive contact element is a column structure or a sheet structure.

[0011] The conductive contact piece is an elastic pin used for elastically pressing onto the power terminal.

[0012] The detachable connection structure is a detachable connection structure used for detachably fixing to a circuit board to which a wiring terminal block is fixed, and the detachable connection structure is arranged at the end of the fixing arm.

[0013] There are two fixing arms, which are arranged facing each other. A hook is protruded on one side of each fixing arm close to each other and is used to hook onto the side of the circuit board facing away from the terminal block. The detachable connection structure is formed by the hook.

[0014] The device body is provided with a lead wire, and the connection terminal is formed by the lead wire.

[0015] The end of the lead-out wire for connecting with the test cable is provided with a conductive connector.

[0016] Beneficial effect: The present invention adopts the above-mentioned technical scheme, and the fixing arm and the detachable connecting structure thereon can realize the fixation of the device body relative to the terminal block, thereby maintaining the conductivity between the conductive contact piece on the power terminal inserted into the plug-in port on the terminal block and pressed against the power terminal in the plug-in port, and the connecting terminal can be connected to the test cable in a form that is easy to connect. Compared with the prior art, there is no need to operate the terminal block for wiring, wiring is convenient, and it is beneficial to improve work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure in which a terminal block is fixed on a circuit board in the prior art;

[0018] Figure 2 yes Figure 1 A top view of

[0019] Figure 3 This is a schematic diagram of the use state of the first embodiment of the terminal block test connection device of the present invention;

[0020] Figure 4 yes Figure 3 Right side view of the terminal block test connection device in;

[0021] Figure 5 It is a structural schematic diagram of a second embodiment of a terminal block test connection device in the present invention;

[0022] Figure 6 It is a structural schematic diagram of the third embodiment of the terminal block test connection device in the present invention.

[0023] The names corresponding to the figure marks in the figure are: 1-device body, 2-pin contact, 3-fixed arm, 4-hook, 5-lead wire, 6-conductive block, 7-intermediate conductor, 8-circuit board, 9-terminal row, 10-wire insertion port, 11-spring screw-on port, 12-positioning surface. DETAILED DESCRIPTION

[0024] The present invention will be further described below in conjunction with the accompanying drawings.

[0025] Embodiment 1 of the terminal block test connection device of the present invention Figure 3~Figure 4 As shown, a terminal block test connection device for DCS power switching test, the corresponding terminal block 9 is a double-layer screw-free spring-type terminal. The terminal block test connection device includes a device body 1, one side of the device body 1 is a step structure, the step structure is used to match the shape of the step surface of the power terminal on the terminal block 9. The side of the device body 1 with the step structure is provided with a columnar pin contact 2, the pin contact 2 forms a conductive contact for inserting into the plug port 10 on the terminal block 9, and can be pressed onto the power terminal in the plug port 10 to achieve conduction with the power terminal when in use. The pin contacts 2 on each step are arranged in a row, and the number is the same as the number of connection terminals on the terminal block 9.

[0026] Fixed arms 3 for fixing the device body 1 are provided on both sides in the length direction. The fixed arms 3 are plate-like structures. The two fixed arms 3 are arranged facing each other. A hook 4 for hooking onto the side of the circuit board 8 facing away from the terminal block 9 is convexly provided on the side close to each other. The hook 4 forms a detachable connection structure for detachably fixing the circuit board 8 fixed to the terminal block 9.

[0027] In order to prevent the terminal block test connection device from shaking when plugging in, the step structure is used to match the shape of the step surface of the power terminal on the terminal block 9, which can improve the connection reliability.

[0028] A lead wire 5 is provided on the side of the device body 1 facing away from the conductive contact. There are a plurality of lead wires 5, which correspond to each conductive contact one by one and are connected through an intermediate conductor 7 inside the device body 1. Each lead wire 5 forms a connection terminal for connecting a test cable. Generally, during testing, the cable is connected through an alligator clip. In order to facilitate the connection and ensure the reliability of the connection, a conductive block 6 is provided at the end of the lead wire 5 for connecting the test cable. The conductive block 6 forms a conductive connector. In other embodiments, the conductive connector can also be replaced with other forms. For example, when the cable is connected through a plug connector, the conductive connector can be replaced with a plug connector with a jack.

[0029] When switching the DCS power supply, the pin contact 2 of the terminal block test connection device is directed toward the terminal block 9, and the pin contact 2 is inserted into the wire insertion port 10 on the terminal block 9. The terminal block test connection device is continued to be moved so that each pin contact 2 is pressed against each corresponding power terminal to achieve conduction. At this time, the hook 4 on the fixed arm 3 is hooked to the side of the circuit board 8 facing away from the terminal block 9 in the form of a snap connection, so as to fix the terminal block test connection device and ensure that the pin contact 2 and the power terminal on the terminal block 9 remain conductive. Then, use an alligator clip to clamp it on the conductive block 6 to achieve circuit connectivity. After the test is completed, use a little force to move the two fixed arms 3 away from each other, release the snap connection between the hook 4 and the circuit board 8, and then remove the terminal block test connection device. This terminal block test connection device is equivalent to a plug, and the terminal block is equivalent to a socket. When in use, it is equivalent to pressing the plug directly on the socket, which is easy to operate and efficient.

[0030] Embodiment 2 of the terminal block test connection device of the present invention is as follows Figure 5 As shown, the difference from the first embodiment is that the conductive contact member in this embodiment is a sheet-like structure, which can contact with the power terminal in the form of a spring sheet, thereby increasing the contact area and improving the contact stability and reliability.

[0031] Embodiment 3 of the terminal block test connection device of the present invention is as follows Figure 6 As shown, the difference from the first embodiment is that in this embodiment, in order to prevent the pin contact 2 from being damaged, the top and bottom ends of the step structure are respectively provided with positioning surfaces 12 for pressing against the wiring terminal row 9. At this time, the step structure on the device body 1 can leave a gap with the wiring terminal row 9 when in use. In other embodiments, the positioning surface 12 can also be adapted only to the circuit board 8.

[0032] In other embodiments of the present invention, the detachable connection structure on the terminal block test connection device is a fixing hole provided on the fixed arm 3, and the device body 1 can be fixed to the circuit board 8 through the fixing hole and screws when in use. In other embodiments, the fixed arm 3 can also be arranged along the width direction of the device body 1; when fixed by screws, only one fixed arm 3 can be provided; and the fixed arm can also be directly fixed to the terminal block, for example, a set screw is provided on the fixed arm, and it is fixed to the side of the terminal block by the set screw, and a snap structure is provided between the terminal block and the fixed arm, and it is fixed to the terminal block by snapping. In addition, in other embodiments, according to the structure of the terminal block 9, the conductive contacts on the device body 1 can also be provided in more than three rows, or only one row of conductive contacts can be provided, and multiple terminal block test connection devices can be fixed on the terminal block 9 when in use. In addition, in other embodiments, the device body and the conductive contact piece may not be arranged in a step structure, for example, the device body is arranged in a form in which the lower side surface is a flat surface, and each conductive contact piece is arranged in a form in which the top is flush with each other, so that when the device body is fixed in place, the conductive contact piece can be ensured to be conductive with the power terminal on the terminal block. Furthermore, in other embodiments, the conductive contact piece may also be an elastic pin for elastically pressing onto the power terminal, and the connection terminal on the device body 1 for connecting the test cable may also be a rigid body fixedly arranged on the device body 1, and the conductive contact piece and the connection terminal may be an integral structure.

[0033] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions recorded in the aforementioned embodiments without creative work, or replace some of the technical features therein with equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A terminal block test connection device for DCS power supply switching test, characterized in that: The terminal block is a double-layer screw-free spring-type terminal block. The terminal block is divided into two layers, upper and lower, to form a step structure. Each layer includes two rows of holes, one row of holes is a plug-in port for inserting lead wires or signal cables, and the other row of holes is a spring-screw-up port for operating springs. It also includes a device body, which is provided with a conductive contact piece for inserting into the plug-in port on the terminal block and pressing against the power terminal in the plug-in port. The conductive contact piece is arranged in a step shape to adapt to the power terminal arranged in a step shape on the terminal block. The device body is also provided with a fixing arm for fixing the device body and a connection terminal for connecting a test cable. The fixing arm is provided with a detachable connecting structure for detachably fixing to a circuit board fixed with a terminal block, the fixing arm is provided with a hook, the hook forms a detachable connecting mechanism, the hook is used to hook to the side of the circuit board facing away from the terminal block in the form of a snap connection, the side of the device body provided with a conductive contact piece is a step structure, the step structure on the device body is used to match the shape of the step surface of the power terminal on the terminal block, the top and bottom ends of the step structure on the device body are respectively provided with positioning surfaces for pressing onto the terminal block or the circuit board, and the connecting terminal is conductively connected to the conductive contact piece.

2. The terminal block test connection device for DCS power supply switching test according to claim 1, characterized in that: The conductive contact element is a column structure or a sheet structure.

3. The terminal block test connection device for DCS power supply switching test according to claim 1, characterized in that: The conductive contact piece is an elastic pin used for elastically pressing onto the power terminal.

4. The terminal block test connection device for DCS power supply switching test according to claim 1, characterized in that: The detachable connection structure is arranged at the end of the fixed arm.

5. The terminal block test connection device for DCS power supply switching test according to claim 4, characterized in that: There are two fixing arms, which are arranged facing each other, and a hook is protruded from one side of each fixing arm close to each other.

6. The terminal block test connection device for DCS power supply switching test according to claim 1, characterized in that: The device body is provided with a lead wire, and the connection terminal is formed by the lead wire.

7. The terminal block test connection device for DCS power supply switching test according to claim 6, characterized in that: The end of the lead-out wire for connecting with the test cable is provided with a conductive connector.

Images