A DCS wiring auxiliary device with short-circuit-proof lead wire

Abstract

The present invention relates to a DCS wiring auxiliary device with anti-short-circuit lead-out wires, comprising a wiring terminal sleeve, a lead-out wire and a lead-out wire protective sleeve, wherein the wiring terminal sleeve comprises an insulating plastic circular shell, wherein an elastic electrical contact piece is arranged inside the insulating plastic circular shell, wherein the fixed end of the elastic electrical contact piece is connected to one end of the lead-out wire, and a lead-out wire metal head is exposed at the other end of the lead-out wire; the lead-out wire protective sleeve comprises a first insulating plastic cylinder and a second insulating plastic cylinder, wherein the two insulating plastic cylinders are connected side by side; the first insulating plastic cylinder is open at both ends; the second insulating plastic cylinder is closed at one end and open at the other end, and the open end is used to insert the lead-out wire metal head. The present invention can effectively avoid the risk of signal short circuit and open circuit during wiring and testing, thereby reducing the risk of tripping during unit testing; it does not affect the wiring terminals, thereby ensuring the service life of the wiring terminals and the wiring reliability; it is easy to operate, and can be used repeatedly after only one installation, thereby reducing the workload.

Description

Technical Field

[0001] The invention belongs to the technical field of thermal power generation, and in particular relates to a DCS wiring auxiliary device with short-circuit-proof lead-out wires. Background Art

[0002] At present, most generator sets are controlled by distributed control systems (DCS). The control signal lines are connected to the DCS control system through the wiring terminals. To ensure the reliability and correctness of the wiring, if the wiring is changed or the wiring terminals are touched again after the unit is put into operation, re-transmission confirmation must be carried out, and there are certain risks. The steam turbine needs to perform valve closing time tests before the unit is started, load shedding tests, and after the unit is overhauled. The test requires the use of a millisecond-level recorder to sample and record multiple groups of signals such as valve feedback, grid-connected signals, and speed signals online. To ensure the authenticity and immediacy of the recording, it is generally not processed by the DPU, and the field signals need to be sampled at the wiring terminals.

[0003] In the prior art, when sampling signals such as turbine valve feedback and grid connection of the DCS / DEH system, an external short wire is usually pressed into the DCS terminal to extract the signal for sampling. After a single wave recording test, the lead wire will not be removed, but the metal head of the lead wire will be wrapped with insulating tape to prevent short circuit or influence on other signals, and will be used again for the next test.

[0004] The method adopted in the prior art is cumbersome to operate and has the following disadvantages: on the one hand, the DCS terminal block is not designed for simultaneously pressing in two wires, which may easily lead to poor contact or irreversible damage to the terminal block; on the other hand, after the test, if the insulation wrapping or position adjustment of the short-wire metal head of the terminal crimping is improper, it may easily lead to short circuit or affect other signal lines, which may cause great risks. Summary of the invention

[0005] The purpose of the present invention is to provide a DCS wiring auxiliary device with short-circuit-proof lead wires to solve the above technical problems.

[0006] The present invention provides a DCS wiring auxiliary device with short-circuit-proof lead wires, comprising a wiring terminal sleeve, a lead wire and a lead wire protection sleeve, wherein the wiring terminal sleeve comprises an insulating plastic circular shell, wherein an elastic electrical contact piece is arranged in the insulating plastic circular shell, wherein a fixed end of the elastic electrical contact piece is conductively connected to one end of the lead wire, and a lead wire metal head for testing is exposed at the other end of the lead wire;

[0007] The lead wire protection sleeve comprises a first insulating plastic cylinder and a second insulating plastic cylinder, wherein the first insulating plastic cylinder and the second insulating plastic cylinder are connected side by side to form a connected insulating plastic cylinder structure; the first insulating plastic cylinder is open at both ends and is used to insert the DCS wiring so that the DCS wiring metal head is inserted into and passes through the elastic electrical contact piece of the wiring terminal sleeve and is pressed and connected with the DCS terminal; the second insulating plastic cylinder is closed at one end and open at the other end, and its open end is used to insert the lead wire metal head.

[0008] By means of the above scheme, the DCS wiring auxiliary device with short-circuit-proof lead wire has the following technical effects:

[0009] 1) It can effectively avoid the risk of signal short circuit and open circuit during wiring and testing, thereby reducing the risk of tripping during unit testing;

[0010] 2) No impact on the wiring terminals, ensuring the life of the wiring terminals and wiring reliability;

[0011] 3) Easy to operate, it can be used repeatedly after installation only once, reducing workload.

[0012] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the present invention in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the structure of the terminal sleeve and lead wire of the DCS wiring auxiliary device with short-circuit-proof lead wire of the present invention;

[0014] Figure 2 The invention is a schematic structural diagram of a lead-out wire protective cover of a DCS wiring auxiliary device with a short-circuit-proof lead-out wire.

[0015] Figure 3 The present invention is a schematic diagram of the use of a DCS wiring auxiliary device with short-circuit-proof lead wires.

[0016] Numbers in the figure:

[0017] 1-terminal sleeve; 11-insulating plastic round shell; 12-elastic electrical contact piece;

[0018] 2-lead wire; 21-lead wire metal head; 22-insulation sheath;

[0019] 3-lead wire protection sleeve; 31-first insulating plastic cylinder; 32-second insulating plastic cylinder;

[0020] 4-DCS wiring (DCS signal line); 41-DCS wiring metal head. DETAILED DESCRIPTION

[0021] The specific implementation of the present invention is further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0022] Ginseng Figure 1 , Figure 2 As shown, this embodiment provides a DCS wiring auxiliary device with an anti-short-circuit lead wire, including a wiring terminal sleeve 1, a lead wire 2 and a lead wire protection sleeve 3, the wiring terminal sleeve 1 includes an insulating plastic circular shell 11, an elastic electrical contact piece 12 is arranged in the insulating plastic circular shell 11, the fixed end of the elastic electrical contact piece 12 is conductively connected to one end of the lead wire 2, and the other end of the lead wire 2 is exposed with a lead wire metal head 21 for testing;

[0023] The lead wire protection sleeve 3 includes a first insulating plastic cylinder 31 and a second insulating plastic cylinder 32, and the first insulating plastic cylinder 31 and the second insulating plastic cylinder 32 are connected side by side to form a connected insulating plastic cylinder structure; the first insulating plastic cylinder 31 is open at both ends and is used to insert the DCS wiring 4, so that the DCS wiring metal head 41 is inserted into and passes through the elastic electrical contact piece 12 of the terminal sleeve 1 and is pressed and connected with the DCS terminal; the second insulating plastic cylinder 32 is closed at one end and open at the other end, and its open end is used to insert the lead wire metal head 21, so as to prevent short circuit and fix the lead wire 2.

[0024] The DCS wiring auxiliary device with anti-short-circuit lead wire can effectively avoid the risk of signal short circuit and open circuit during wiring and testing, thereby reducing the risk of tripping during unit testing; it has no impact on the wiring terminals, ensuring the life of the wiring terminals and wiring reliability; it is easy to operate and can be used repeatedly after only one installation, reducing workload.

[0025] In this embodiment, the length of the terminal sleeve 1 is about 2 cm; the lead wire 2 is wrapped by the insulating sheath 22, and the original length is 10 cm (it can be cut to a suitable length according to the usage); the lead wire protection sleeve 3 is 5 cm long.

[0026] Ginseng Figure 3As shown, when the DCS is wired for the first time, first insert the first insulating plastic cylinder 31 into the DCS wiring 4, then peel off the insulation sheath of the DCS wiring by about 3 cm, insert the terminal cover 3 (the lead wire points to the direction of the protective cover), expose the DCS wiring metal head 41 by about 1 cm, connect it to the DCS terminal and press it. According to the actual situation on site, cut the lead wire 2 to a suitable length, peel off about 1 cm of the insulation sheath 22 (for connecting the recording sampling clamp), insert it into the second insulating plastic circle 32 of the lead wire protective cover 3, adjust the lead wire protective cover 3 to the appropriate position, and ensure that the lead wire metal head 21 is close to the closed end of the second insulating plastic circle 32. During the test, slide the lead wire protective cover 3 to expose the lead wire metal head 21 for testing. After the test, insert the lead wire 2 into the lead wire protective cover 3 and slide it left and right to the appropriate position again.

[0027] The present invention has a simple structure and can meet all wiring requirements of tests such as valve closing time recording at a relatively low cost; it will not affect the original design and wiring of the DCS system; and it can effectively reduce the risk of non-stopping of the unit caused by signal short circuit and open circuit caused by the test and lead-out wires during the commissioning and production of the generator set.

[0028] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. It should be pointed out that a person skilled in the art can make several improvements and modifications without departing from the technical principles of the present invention, and these improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A DCS wiring auxiliary device with short-circuit proof lead wire, characterized in that: It comprises a terminal sleeve, a lead wire and a lead wire protection sleeve, wherein the terminal sleeve comprises an insulating plastic circular shell, an elastic electrical contact piece is arranged in the insulating plastic circular shell, a fixed end of the elastic electrical contact piece is conductively connected to one end of the lead wire, and a lead wire metal head for testing is exposed at the other end of the lead wire; The lead-out wire protective sleeve comprises a first insulating plastic cylinder and a second insulating plastic cylinder, wherein the first insulating plastic cylinder and the second insulating plastic cylinder are connected side by side to form a conjoined insulating plastic cylinder structure; the first insulating plastic cylinder is open at both ends and is used to insert the DCS wiring so that the DCS wiring metal head is inserted into and passes through the elastic electrical contact piece of the wiring terminal sleeve and is pressed and connected with the DCS terminal; the second insulating plastic cylinder is closed at one end and open at the other end, and the open end is used to insert the lead-out wire metal head; When wiring the DCS for the first time, first insert the first insulating plastic cylinder into the DCS wiring, then peel off 3cm of the DCS wiring insulation, insert the terminal sleeve, expose 1cm of the DCS wiring metal head, connect to the DCS terminal and press it tightly, cut the lead wire to a suitable length according to the actual situation on site, peel off 1cm of the insulation skin, and insert it into the second insulating plastic circle of the lead wire protective cover, adjust the lead wire protective cover to a suitable position, ensure that the lead wire metal head is close to the closed end of the second insulating plastic circle, slide the lead wire protective cover to expose the lead wire metal head for testing, and insert the lead wire into the lead wire protective cover after the test and slide it to a suitable position again.

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