Air separation equipment capable of realizing current protection

Abstract

The utility model discloses an air separation device capable of realizing current protection, which comprises an air compressor, a zero sequence current transformer is arranged on a circuit of the air compressor, one side of the zero sequence current transformer is electrically connected with a relay protector, one side of the relay protector is provided with an installation seat, and the installation seat is provided with an air inlet and an air outlet. A small rotating part is movably mounted on the surface of the mounting seat, a conducting rod is mounted on the surface of the small rotating part, a diversion bridge is arranged on the outer side of the conducting rod, and an electromagnetic pole piece is mounted on the top of the inner wall of the diversion bridge; the zero-sequence current transformer is installed on a line of the air compressor, the zero-sequence current transformer is used for detecting current, the zero-sequence current transformer is electrically connected with the circuit monitor, in this way, the zero-sequence current transformer is connected with a system power grid, and an alarm value and a tripping value of the zero-sequence protection system are adjusted according to zero-sequence current of the system power grid. The transformation ratio of the zero sequence current transformer is tested through current passing, and whether secondary circuit wiring is correct or not is checked.

Description

Technical Field

[0001] This utility model relates to the field of air separation equipment technology, specifically an air separation equipment that can achieve current protection. Background Technology

[0002] Analysis of large-scale power outage cases both domestically and internationally reveals that incorrect operation of power grid backup protection is one of the main causes of the induction and spread of accidents. Zero-sequence current protection is a simple and effective grounding protection method with high sensitivity, minimal impact from transition resistance, and a simple structure and working principle. Therefore, it is used as backup protection for grounding faults. However, during the operation of the air separation system, the alarm and tripping settings of the existing zero-sequence protection functions of each section of the motor do not match the power system, and the set tripping time limit is greater than 2 seconds. When a single-phase grounding occurs in the motor or cable, the switch cannot trip quickly, which may cause the accident to escalate or expand.

[0003] Existing air separation system equipment is not conducive to monitoring the current in the circuit during power operation. When the current exceeds the power system load, it is not easy to implement timely power-off protection, which can lead to short circuit damage in the air separation equipment.

[0004] Therefore, those skilled in the art have provided an air separation device that can achieve current protection to solve the problems mentioned in the background art. Utility Model Content

[0005] The purpose of this invention is to provide an air separation unit that can achieve current protection, so as to solve the problem mentioned in the background art that the existing air separation unit is not conducive to achieving power failure protection during operation.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] An air separation unit capable of current protection includes an air compressor. A zero-sequence current transformer is installed on the circuit of the air compressor. A relay protector is electrically connected to one side of the zero-sequence current transformer. A mounting base is installed on one side of the relay protector. A small rotating component is movably mounted on the surface of the mounting base, and a conductive rod is mounted on the surface of the small rotating component. A current-guiding bridge is provided on the outer side of the conductive rod. An insulating layer is provided on the inner wall of the current-guiding bridge. An electromagnetic pole piece is installed on the top of the inner wall of the current-guiding bridge. A conductive wire harness one is connected to the surface of the conductive rod, and a conductive wire harness two is connected to one side of the current-guiding bridge.

[0008] As a further embodiment of this utility model, a second line connector is installed at the end of the conductive wire harness away from the current-conducting bridge, and a terminal post is connected and installed at one end of the line connector, with a wire connector installed on the outside of the terminal post.

[0009] As a further embodiment of this utility model, a wire connector is installed at the end of the conductive wire harness away from the conductive rod, and a wire connector is installed on the outside of the wire connector.

[0010] As a further embodiment of this utility model, the conductive wire harness two is interconnected with the terminal post through the line connector two, and the line connector two is threadedly connected to the wire connector one through the terminal post.

[0011] As a further improvement in this invention, the small rotating component is fixedly connected to the conductive rod, and the small rotating component is interconnected with the flow-guiding bridge through the conductive rod.

[0012] As a further embodiment of this utility model, the conductive rod on the surface of the small rotating part is electrically connected to the relay protector via an electric wire, and the conductive rod is connected to one end of the conductive wire harness.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1. Install a zero-sequence current transformer on the air compressor circuit to detect the current. The zero-sequence current transformer is electrically connected to the circuit monitor. In this way, the system power grid is connected through the zero-sequence current transformer. The alarm value and trip value of the zero-sequence protection system are adjusted according to the zero-sequence current of the system power grid. The transformation ratio of the zero-sequence current transformer is tested by conducting current flow tests to check whether the secondary circuit wiring is correct.

[0015] 2. By setting up a relay protector, the relay protector can cut off the circuit in time, thereby protecting the circuit current, improving the operational safety of the air separation equipment, avoiding line damage, and in the event of a fault, the circuit breaker will quickly cut off the power supply within the allowable time, reducing the loss of motor or line faults in the air separation system. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of an air separation unit that can achieve current protection.

[0017] Figure 2 This is a structural schematic diagram of a small rotating component in an air separation unit that can achieve current protection.

[0018] Figure 3 In an air separation unit that can achieve current protection Figure 2 Enlarged structural diagram at point A in the middle.

[0019] Figure 4 This is a schematic diagram of the connection structure between the terminal post and the wire connector in an air separation unit that can achieve current protection.

[0020] In the diagram: 1. Air compressor; 2. Zero-sequence current transformer; 3. Relay protector; 4. Small connector; 5. Mounting base; 6. Conductive rod; 7. Conductive wire harness one; 8. Conductive wire harness two; 9. Wire connector one; 10. Line connector one; 11. Wire connector two; 12. Line connector two; 13. Terminal post; 14. Current-conducting bridge; 15. Insulation layer; 16. Electromagnetic pole piece. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Please see Figures 1-4 This utility model provides an air separation device capable of current protection, comprising: an air compressor 1, a zero-sequence current transformer 2 installed on the circuit of the air compressor 1, a relay protector 3 electrically connected to one side of the zero-sequence current transformer 2, a mounting base 5 installed on one side of the relay protector 3, a small rotating part 4 movably mounted on the surface of the mounting base 5, and a conductive rod 6 mounted on the surface of the small rotating part 4, a current-guiding bridge 14 provided on the outer side of the conductive rod 6, an insulating layer 15 provided on the inner wall of the current-guiding bridge 14, an electromagnetic pole piece 16 mounted on the top of the inner wall of the current-guiding bridge 14, a conductive wire harness 7 connected to the surface of the conductive rod 6, and a conductive wire harness 8 connected to one side of the current-guiding bridge 14.

[0023] A second conductor connector 12 is installed at the end of the conductive wire harness 8 away from the current-conducting bridge 14. A terminal post 13 is connected to the end of the conductor connector 13. A wire connector 9 is installed on the outside of the terminal post 13. A first conductor connector 10 is installed at the end of the conductive wire harness 7 away from the conductive rod 6. A second conductor connector 11 is installed on the outside of the first conductor connector 10. The conductive wire harness 8 is connected to the terminal post 13 through the second conductor connector 12. The second conductor connector 12 is threadedly connected to the first conductor connector 9 through the terminal post 13.

[0024] Specifically, conductive wire harness 7 and conductive wire harness 8 have the same structure, both of which are equipped with wire connectors and are connected to terminal posts 13 through the wire connectors. The terminal posts 13 are also connected to wire connectors and are electrically connected to the wires of the air compressor 1 on the air separation system equipment through the wire connectors. Conductive wire harness 7 and conductive wire harness 8 are connected by the flow guide bridge 14.

[0025] The small rotating part 4 and the conductive rod 6 are fixedly connected, and the small rotating part 4 is connected to the current-conducting bridge 14 through the conductive rod 6. The conductive rod 6 on the surface of the small rotating part 4 is electrically connected to the relay protector 3 through the wire. The conductive rod 6 is connected to one end of the conductive wire harness 7.

[0026] Specifically, the current-conducting bridge 14 is used to connect conductive wire harness 7 and conductive wire harness 8. An electromagnetic pole piece 16 is provided on the upper inner wall of the current-conducting bridge 14. When energized, the electromagnetic pole piece 16 generates magnetism, which attracts the conductive rod 6 to adhere, thereby connecting conductive wire harness 7 and conductive wire harness 8. When the relay protector 3 cuts off the line, the conductive rod 6 separates from the electromagnetic pole piece 16, thus disconnecting the line in conjunction with the relay protector 3. The internal insulation layer 15 on both sides of the current-conducting bridge 14 plays an insulating protection role when the conductive rod 6 separates from the electromagnetic pole piece 16.

[0027] The working principle of this utility model is as follows: When using this utility model, the wiring on the air compressor 1 is connected to wire connector 9, and another set of wiring is connected to wire connector 11. Both wire connector 9 and wire connector 11 are connected to wiring connector 10 and wiring connector 12 through terminal posts 13, thereby completing the wiring connection between conductive wire harness 7 and conductive wire harness 8. Conductive wire harness 7 and conductive wire harness 8 are connected through a current-conducting bridge 14. Furthermore, the zero-sequence current transformer 2 senses and detects the current in the wiring. Connect to the power grid, adjust the alarm value and trip value of the zero-sequence protection system according to the zero-sequence current of the power grid, check the transformation ratio of the zero-sequence current transformer 2 by conducting current test, check whether the secondary circuit wiring is correct, and set the relay protection device 3. When the current exceeds the preset threshold, the relay protection device 3 will cut off the circuit. After the current is cut off, the magnetic force of the electromagnetic pole piece 16 installed in the current-conducting bridge 14 disappears. The small rotating part 4 and the mounting base 5 are movably rotatably connected. The magnetic force disappears. Under the action of gravity, the conductive rod 6 falls and separates from the electromagnetic pole piece 16. The line between conductive wire harness 1 7 and conductive wire harness 2 8 is disconnected.

[0028] 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. An air separation unit capable of providing current protection, characterized in that, include: An air compressor (1) is provided with a zero-sequence current transformer (2) installed on its circuit. A relay protector (3) is electrically connected to one side of the zero-sequence current transformer (2). A mounting base (5) is installed on one side of the relay protector (3). A small rotating part (4) is movably mounted on the surface of the mounting base (5). A conductive rod (6) is mounted on the surface of the small rotating part (4). A current-guiding bridge (14) is provided on the outer side of the conductive rod (6). An insulating layer (15) is provided on the inner wall of the current-guiding bridge (14). An electromagnetic pole piece (16) is installed on the top of the inner wall of the current-guiding bridge (14). A conductive wire harness one (7) is connected to the surface of the conductive rod (6). A conductive wire harness two (8) is connected to one side of the current-guiding bridge (14).

2. The air separation unit capable of current protection according to claim 1, characterized in that, The conductive wire harness 2 (8) is equipped with a wire connector 2 (12) at one end away from the current-conducting bridge (14), and a terminal post (13) is connected and installed at one end of the wire connector. A wire connector 1 (9) is installed on the outside of the terminal post (13).

3. The air separation unit capable of current protection according to claim 1, characterized in that, The conductive wire harness (7) is equipped with a wire connector (10) at one end away from the conductive rod (6), and a wire connector (11) is installed on the outside of the wire connector (10).

4. The air separation unit capable of current protection according to claim 1, characterized in that, The conductive wire harness 2 (8) is connected to the terminal post (13) through the wire connector 2 (12), and the wire connector 2 (12) is threadedly connected to the wire connector 1 (9) through the terminal post (13).

5. An air separation unit capable of current protection according to claim 1, characterized in that, The small rotating component (4) is fixedly connected to the conductive rod (6), and the small rotating component (4) is connected to the flow guide bridge (14) through the conductive rod (6).

6. An air separation unit capable of current protection according to claim 1, characterized in that, The conductive rod (6) on the surface of the small rotating part (4) is electrically connected to the relay protector (3) through wires, and the conductive rod (6) is connected to one end of the conductive wire harness (7).

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