Calibration device for intermediate relay
By designing a verification device for intermediate relays, a series-connected parallel structure of multiple bases and connecting wires is used to realize simultaneous verification of multiple intermediate relays, the problem of low verification efficiency in the prior art is solved and improved Efficiency and accuracy while reducing costs.
Patent Information
- Application Number
- CN202411482535.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-23
- Publication Date
- 2024-12-20
AI Technical Summary
The verification of intermediate relays requires repeated disassembly of single intermediate relays, resulting in low calibration efficiency and affecting the progress of overhaul and maintenance of nuclear power plants.
Design an intermediate relay verification device, including multiple bases and connecting wires, connect normally closed jacks, normally open jacks and coil jacks in series and parallel ways to achieve simultaneous verification of multiple intermediate relays and avoid Repeat wiring.
The calibration efficiency of intermediate relays is improved, labor costs are reduced, the device is small in size, light in weight, low in cost, and the accuracy and reliability of calibration results are ensured.
Smart Images
Figure CN119165207A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of intermediate relay verification, and in particular to an intermediate relay verification device. Background Art
[0002] The intermediate relay is a very common automatic electrical appliance in the power industry. It can disconnect AC and DC small-capacity control circuits and provide control, protection and signal conversion functions for them. It is an indispensable appliance in many devices. The principle and structure of the intermediate relay are basically the same as those of the AC contactor. The difference is that the contacts of the intermediate relay can only pass small currents. Therefore, the intermediate relay can only be used in control circuits. Due to the small overload capacity of the intermediate relay, the intermediate relay generally does not have main contacts. Instead, the auxiliary contacts are controlled by the power on or off of its coil to meet the needs of the control circuit. A large number of intermediate relay auxiliary contacts are used in field operations. Therefore, it is necessary to verify the conductivity of the auxiliary contacts of the intermediate relay to ensure the normal operation of the equipment.
[0003] Intermediate relays are widely used in nuclear power plants. Usually, all intermediate relays in low-voltage power distribution equipment are calibrated regularly during overhaul. However, there are many intermediate relays, and a single calibration requires repeated disconnection and wiring. It takes a total of 4 days to complete the calibration of all intermediate relays. Due to the tight power outage window of low-voltage power distribution equipment and the difficulty of maintenance, the long time spent on calibrating intermediate relays will seriously affect the maintenance efficiency of the overhaul low-voltage power distribution equipment and restrict the progress of the overhaul and maintenance work of nuclear power plants. Summary of the invention
[0004] The purpose of the present invention is to provide an intermediate relay verification device to solve the problem that the existing intermediate relay verification requires repeated disconnection and wiring of a single intermediate relay, resulting in low intermediate relay verification efficiency, and to achieve simultaneous verification of multiple intermediate relays, effectively improving the intermediate relay verification efficiency.
[0005] In order to achieve the above object, the present invention provides the following technical solutions:
[0006] An intermediate relay calibration device comprises a busbar and a plurality of bases mounted on the busbar; a first flip measurement point and a second flip measurement point are arranged on the upper part of the base, a flip measurement common point, a coil negative input terminal and a coil positive input terminal are arranged on the lower part of the base, a normally closed jack, a normally open jack, a common jack and a coil jack are arranged in the middle part of the base, and the coil negative input terminal and the coil positive input terminal are connected to the base through screws; the coil jacks are connected in parallel between the bases through connecting wires, the flip measurement common points are connected in series in pairs through connecting wires, and the normally closed jacks and the normally open jacks are connected in series in pairs in pairs through connecting wires.
[0007] As one of the feasible ways, the intermediate relay includes a shell, a fixed iron core, a spring, a connecting wire, two armatures, copper sheet contacts and a coil inside the shell, and coil contacts, a common contact, a normally open contact and a normally closed contact outside the shell; the coil contacts are connected to the coil, and the coil is wound around the fixed iron core; the armature is installed on the right side of the fixed iron core and is separated by a spring installed on the fixed iron core; the common contact is connected to the normally open contact or the normally closed contact through the connecting wire and the copper sheet contact.
[0008] As one achievable manner, the normally closed jack and the normally closed contact, the normally open jack and the normally open contact, the common jack and the common contact, and the coil jack and the coil contact are all connected and conducted via connecting wires.
[0009] As one of the feasible ways, the intermediate relay verification device is made of conventional aluminum-zinc coated or equivalent strength plates and insulating materials.
[0010] Beneficial technical effects of the present invention:
[0011] The intermediate relay verification device of the present invention can verify multiple intermediate relays at the same time, avoid repeated disconnection and wiring of a single intermediate relay, effectively improve the verification efficiency of the intermediate relays and reduce the labor cost of the intermediate relay verification.
[0012] The intermediate relay verification device of the present invention has small size, low weight, does not occupy space, is easy to carry and operate, and can adjust the number of bases according to the on-site working space and the number of intermediate relays to be verified, thereby meeting the needs of different working occasions.
[0013] The intermediate relay checking device of the present invention is made of conventional aluminum-zinc coated or equivalent strength plate and insulating material, and has a low cost, thus saving expense.
[0014] The intermediate relay calibration device of the present invention eliminates the situation where some measurement quantity results that occur in common calibration instruments are inaccurate through the connection mode designed between the bases, and can simultaneously ensure the accuracy and reliability of the calibration results of multiple intermediate relays. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 It is a structural schematic diagram of an embodiment of an intermediate relay verification device of the present invention;
[0016] Figure 2 The figure is a schematic structural diagram of an embodiment of an intermediate relay verification device.
[0017] In the figure, 1. Install the busbar; 2. Negative input terminal of the coil; 3. Positive input terminal of the coil; 4. Flip measurement common point; 5. Flip measurement point; 6. Flip measurement point; 7. Base; 8. Normally closed jack; 9. Normally open jack; 10. Common jack; 11. Coil jack; 12. Shell; 13. Fixed iron core; 14. Spring; 15. Connecting wire; 16. Armature; 17 Copper sheet contact; 18. Coil; 19. Coil contact; 20. Common contact; 21. Normally open contact; 22. Normally closed contact. DETAILED DESCRIPTION
[0018] The technical solution of the present invention is described clearly and completely below in conjunction with the accompanying drawings and specific implementation methods. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0019] In the description of the present invention, it is necessary to understand that the orientations or positional relationships indicated by terms such as “upper”, “lower”, “middle”, “inside”, “outside”, “left side” and “right side” are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.
[0020] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0021] See also Figure 1 The present embodiment provides an intermediate relay calibration device, comprising a busbar 1 and a plurality of bases 7 mounted on the busbar 1; a first flip measurement point 5 and a second flip measurement point 6 are provided on the upper portion of the base 7, a flip measurement common point 4, a coil negative input terminal 2 and a coil positive input terminal 3 are provided on the lower portion of the base 7, a normally closed jack 8, a normally open jack 9, a common jack 10 and a coil jack 11 are provided in the middle portion of the base 7, and the coil negative input terminal 2 and the coil positive input terminal 3 are connected to the base 7 by screws; according to the principle of series voltage division and parallel current division, the coil jacks 11 are connected in parallel between the bases 7 by connecting wires 15, the flip measurement common points 4 are connected in series in pairs by connecting wires 15, and the normally closed jacks 8 and the normally open jacks 9 are connected in series in pairs by connecting wires 15.
[0022] The number of bases 7 is adjusted according to the on-site operation space and the number of intermediate relays to be checked. In this embodiment, as one of the achievable methods, the number of bases 7 is 5; the intermediate relay checking device is 33.2 cm long, 10.2 cm wide, and weighs 821 g.
[0023] See also Figure 2 In this embodiment, as one of the feasible ways, the intermediate relay includes a shell 12, a fixed iron core 13, a spring 14, a connecting wire 15, two armatures 16, a copper sheet contact 17 and a coil 18 inside the shell 12, and a coil contact 19, a common contact 20, a normally open contact 21 and a normally closed contact 22 outside the shell 12; the coil contact 19 is connected to the coil 18, and the coil 18 is wound around the fixed iron core 13; the armature 16 is installed on the right side of the fixed iron core 13, and is separated by the spring 14 installed on the fixed iron core 13; the common contact 20 is connected to the normally open contact 21 or the normally closed contact 22 through the connecting wire 15 and the copper sheet contact 17.
[0024] In this embodiment, as one of the feasible ways, the normally closed jack 8 and the normally closed contact 22 , the normally open jack 9 and the normally open contact 21 , the common jack 10 and the common contact 20 , and the coil jack 11 and the coil contact 19 are all connected and conducted via the connecting wire 15 .
[0025] In this embodiment, as one of the feasible ways, the intermediate relay verification device is made of conventional aluminum-zinc coated or equivalent strength plates and insulating materials, which has a low cost and saves money.
[0026] Working principle of the intermediate relay verification device: After the normally closed jack 8 and the normally closed contact 22, the normally open jack 9 and the normally open contact 21, the common jack 10 and the common contact 20, and the coil jack 11 and the coil contact 19 are all connected and conducted through the connecting wire 15, use a multimeter to measure, connect the red test lead to the flip measurement common point 4, and the black test lead to the second flip measurement point 6, confirm that the circuit is conducted, indicating that the connection between the normally closed jack 8 and the normally closed contact 22 is correct; then connect the black test lead to the first flip measurement point 5, confirm that the circuit is disconnected, indicating that the connection between the normally open jack 9 and the normally open contact 21 is correct;
[0027] After confirming that the connection between the normally closed jack 8 and the normally closed contact 22 and the connection between the normally open jack 9 and the normally open contact 21 are correct, measure the direct resistance of the normally closed contact 22;
[0028] If the direct resistance of the normally closed contact 22 is greater than the set value, a small current is passed through the normally closed contact 22 to remove the oxide layer of the normally closed contact 22;
[0029] At this time, the external power supply is connected through the coil negative input terminal 2 and the coil positive input terminal 3, and the external power supply enters the coil jack 11 of the base 7 through the coil positive input terminal 3, and then flows into the coil 18 through the coil contact 19 connected to the base 7, flows back to the base 7 from the coil contact 19 after surrounding the fixed iron core 13, and finally flows out from the coil negative input terminal 2 to form a current loop;
[0030] In this current loop, the fixed iron core 13 generates electromagnetic force after the winding coil 18 is energized, and the armature 16 is attracted, so the copper contact 17 leaves the normally closed contact 22 and closes with the normally open contact 21, causing the intermediate relay contact to flip. At this time, the red test lead of the multimeter is connected to the flip measurement common point 4, and the black test lead is connected to the first flip measurement point 5 to confirm that the circuit is conductive, indicating that the normally open contact 21 of the intermediate relay is attracted after power is turned on; then the black test lead is connected to the second flip measurement point 6 to confirm that the circuit is disconnected, indicating that the normally closed contact 22 of the intermediate relay is disconnected after power is turned on.
[0031] The direct resistance of the normally open contact 21 is measured; if the direct resistance of the normally open contact 21 is greater than the set value, a small current is passed through the normally open contact 21 to remove the oxide layer of the normally open contact 21.
[0032] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.
Claims
1. An intermediate relay calibration device, characterized in that: The invention comprises a busbar (1) and a plurality of bases (7) mounted on the busbar (1); a first flip measurement point (5) and a second flip measurement point (6) are arranged on the upper part of the base (7); a flip measurement common point (4), a coil negative input terminal (2) and a coil positive input terminal (3) are arranged on the lower part of the base (7); a normally closed jack (8), a normally open jack (9), a common jack (10) and a coil jack (11) are arranged in the middle part of the base (7); the coil negative input terminal (2) and the coil positive input terminal (3) are connected to the base (7) by screws; the coil jacks (11) are connected in parallel between the bases (7) by connecting wires (15); the flip measurement common points (4) are connected in series in pairs by connecting wires (15); and the normally closed jacks (8) and the normally open jacks (9) are connected in series in pairs by connecting wires (15).
2. The intermediate relay verification device according to claim 1, characterized in that: The intermediate relay comprises a housing (12), a fixed iron core (13), a spring (14), a connecting wire (15), two armatures (16), a copper sheet contact (17) and a coil (18) inside the housing (12), and a coil contact (19), a common contact (20), a normally open contact (21) and a normally closed contact (22) outside the housing (12); the coil contact (19) is connected to the coil (18), and the coil (18) is wound around the fixed iron core (13); the armature (16) is installed on the right side of the fixed iron core (13) and is isolated by a spring (14) installed on the fixed iron core (13); the common contact (20) is connected to the normally open contact (21) or the normally closed contact (22) through the connecting wire (15) and the copper sheet contact (17).
3. The intermediate relay verification device according to claim 2, characterized in that: The normally closed socket (8) and the normally closed contact (22), the normally open socket (9) and the normally open contact (21), the common socket (10) and the common contact (20), and the coil socket (11) and the coil contact (19) are all connected and conducted via a connecting wire (15).
4. The intermediate relay verification device according to any one of claims 1 to 3, characterized in that: It is made of conventional aluminum-zinc coated or equivalent strength plates and insulating materials.