Coal mill power supply circuit

Abstract

The utility model discloses a coal mill power supply circuit, which relates to the technical field of power supply circuits, and comprises a power supply module, a main power supply line, a standby power supply line, a main line circuit breaker and a standby line circuit breaker, and the load module comprises a plurality of first oil pump motors connected with the main power line and a plurality of second oil pump motors connected with the standby power line. The beneficial effects of the utility model are that the main power supply and the standby power supply are respectively provided with loads, and the main and auxiliary devices can be mutually standby, so that the defects of the existing circuit are solved, i.e., the main power line and the standby power line in the circuit are respectively connected with two groups of oil pump motors, and a double-cut device is removed, thereby avoiding the problems caused by the fault of the double-cut device; the two loops do not influence each other, the fault loop can be disconnected for maintenance during maintenance, safety and maintenance efficiency are improved, and start-stop control of the oil pump motor is facilitated through a control circuit of the contactor.

Description

Technical Field

[0001] The utility model relates to the technical field of power supply circuits, in particular to a coal mill power supply circuit. Background Art

[0002] The existing coal mill power supply circuit generally adopts a dual power supply automatic switching power supply mode, using a double cut device for conversion, two power inputs, one power output, and the output line supplies one load. This method has the following defects: 1. The double cut device itself fails, causing the load to be powered off. The double cut device has an inherent switching time of 3s, which may cause the load power supply to be interrupted; 2. There is electrical connection in the circuit, and the power cannot be cut off during operation to replace the faulty components and equipment. When repairing and replacing equipment, there is no obvious disconnection point of the power supply, which threatens personal safety. Therefore, a coal mill power supply circuit is proposed to solve the above problems. Utility Model Content

[0003] Some simplifications or omissions may be made in this section and the abstract of the specification and the title of the utility model of this application to avoid blurring the purpose of this section, the abstract of the specification and the title of the utility model, and such simplifications or omissions shall not be used to limit the scope of the utility model.

[0004] In view of the above-mentioned prior art problems, the present utility model is proposed.

[0005] The utility model aims to provide a coal mill power supply circuit, and aims to solve the defects of the existing coal mill power supply circuit.

[0006] In order to solve the above technical problems, the utility model provides the following technical solutions: a coal mill power supply circuit, which includes a power module, including a main power line and a backup power line, the main power line is provided with a main line circuit breaker, and the backup power line is provided with a backup line circuit breaker;

[0007] A load module, comprising a plurality of first oil pump motors connected to the main power line and a plurality of second oil pump motors connected to the backup power line, wherein a first oil pump circuit breaker and a first contactor are sequentially connected in series between the first oil pump motor and the main power line through a wire, and a second oil pump circuit breaker and a second contactor are sequentially connected in series between the second oil pump motor and the backup power line through a wire;

[0008] A control module is arranged in the first contactor and the second contactor.

[0009] As a preferred solution of the coal mill power supply circuit of the utility model, wherein: a plurality of the first oil pump motors are connected to the main power line in sequence, and the main line circuit breaker is located between the input end of the main power line and the first oil pump motor.

[0010] As a preferred solution of the coal mill power supply circuit of the utility model, wherein: a plurality of the second oil pump motors are connected to the backup power line in sequence, and the backup line circuit breaker is located between the input end of the backup power line and the second oil pump motor.

[0011] As a preferred solution of the coal mill power supply circuit of the utility model, the control module includes an input end circuit, a first branch circuit, a second branch circuit and a first output end circuit, one end of the first branch circuit is connected to the input end circuit, the other end of the first branch circuit is connected to the first output end circuit, one end of the second branch circuit is connected to the first branch circuit, and the other end of the second branch circuit is connected to the first output end circuit.

[0012] As a preferred solution of the coal mill power supply circuit of the utility model, a second output end circuit is connected between the input end circuit and the second branch circuit, and an air switch is connected between the second output end circuit and the input end circuit.

[0013] As a preferred solution of the coal mill power supply circuit of the utility model, wherein: the first branch line and the second branch line are commonly connected to a conversion switch.

[0014] As a preferred solution of the coal mill power supply circuit of the utility model, wherein: the first branch line is located between the conversion switch and the first output end line, and a manual switch and a first relay group are sequentially connected in series.

[0015] As a preferred solution of the coal mill power supply circuit of the utility model, the second branch line is located between the conversion switch and the first output end line and is also connected in series with an automatic switch and a second relay group.

[0016] As a preferred solution of the coal mill power supply circuit of the utility model, wherein: the first relay group and the second relay group are both composed of a plurality of relays connected in parallel.

[0017] The beneficial effects of the utility model are as follows: the defects of the existing circuit are solved by adopting a main power supply and a backup power supply each carrying a load, and at the same time adopting a method in which the main and auxiliary equipment can serve as backup for each other, that is, the main power line and the backup power line in the circuit are respectively connected to two groups of oil pump motors, and the double-cut device is removed to avoid problems caused by the failure of the double-cut device, and the two circuits do not affect each other. During maintenance, the faulty circuit can be disconnected for maintenance, thereby improving safety and maintenance efficiency, and the start and stop control of the oil pump motor is facilitated by the control circuit of the contactor. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following briefly introduces the drawings required for the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. Among them:

[0019] Figure 1 The utility model is a circuit diagram of the coal mill power supply circuit.

[0020] Figure 2 This is a circuit diagram of the control module of the utility model. DETAILED DESCRIPTION

[0021] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and understandable, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0022] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0023] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor is it a separate or selective embodiment that is mutually exclusive with other embodiments.

[0024] Example 1

[0025] Reference Figure 1-2 , which is the first embodiment of the utility model, and provides a coal mill power supply circuit, including a power module 100, including a main power line 101 and a backup power line 102, the main power line 101 is provided with a main line circuit breaker 101a, and the backup power line 102 is provided with a backup line circuit breaker 102a;

[0026] The load module 200 includes a plurality of first oil pump motors 201 connected to the main power line 101 and a plurality of second oil pump motors 202 connected to the backup power line 102, wherein a first oil pump circuit breaker 203 and a first contactor 204 are sequentially connected in series between the first oil pump motor 201 and the main power line 101 through a wire, and a second oil pump circuit breaker 205 and a second contactor 206 are sequentially connected in series between the second oil pump motor 202 and the backup power line 102 through a wire;

[0027] The control module 300 is disposed in the first contactor 204 and the second contactor 206, and is used to control the closing and opening of the contactors, thereby controlling the start and stop of the oil pump motor;

[0028] It should be noted that the models of the main line circuit breaker 101a and the backup line circuit breaker 102a are SACE Tmax T1N1603P 125A, and the power supply of the main power line 101 and the backup power line 102 is 380V / 220V 50Hz.

[0029] Furthermore, a plurality of first oil pump motors 201 are sequentially connected to the main power line 101 , and the main line circuit breaker 101 a is located between the input end of the main power line 101 and the first oil pump motors 201 .

[0030] Furthermore, a plurality of second oil pump motors 202 are sequentially connected to the backup power line 102 , and the backup line circuit breaker 102 a is located between the input end of the backup power line 102 and the second oil pump motors 202 .

[0031] It should be noted that the number of the first oil pump motor 201 and the second oil pump motor 202 are both two, the first oil pump motor 201 is the main equipment, and the second oil pump motor 202 is the auxiliary equipment, the models of the first oil pump circuit breaker 203 and the second oil pump circuit breaker 205 are both MS165-42, and the models of the first contactor 204 and the second contactor 206 are both ABB AC contactor AX50-30.

[0032] When in use, the main line circuit breaker 101a on the main power line 101 is closed, the backup line circuit breaker 102a on the backup power line 102 is disconnected, and then the first oil pump circuit breaker 203 is closed. The main equipment is operated through the first contactor 204 and the start and stop of the first oil pump motor 201. When it is necessary to switch to the backup line, the main line circuit breaker 101a is disconnected, and the backup line circuit breaker 102a and the second oil pump circuit breaker 205 are closed. The second oil pump motor 202 and the fourth oil pump motor prepared by the second contactor 206 are used for backup equipment operation.

[0033] In summary, this circuit adopts the main power supply and the backup power supply to carry their own loads, and at the same time adopts the method that the main and auxiliary equipment can serve as backup for each other, which solves the defects of the existing power supply circuit.

[0034] Example 2

[0035] Reference Figure 1-2 , which is the second embodiment of the utility model, comprises a power module 100, comprising a main power line 101 and a backup power line 102, the main power line 101 is provided with a main line circuit breaker 101a, and the backup power line 102 is provided with a backup line circuit breaker 102a;

[0036] The load module 200 includes a plurality of first oil pump motors 201 connected to the main power line 101 and a plurality of second oil pump motors 202 connected to the backup power line 102, wherein a first oil pump circuit breaker 203 and a first contactor 204 are sequentially connected in series between the first oil pump motor 201 and the main power line 101 through a wire, and a second oil pump circuit breaker 205 and a second contactor 206 are sequentially connected in series between the second oil pump motor 202 and the backup power line 102 through a wire;

[0037] The control module 300 is disposed in the first contactor 204 and the second contactor 206, and is used to control the closing and opening of the contactors, thereby controlling the start and stop of the oil pump motor;

[0038] It should be noted that the models of the main line circuit breaker 101a and the backup line circuit breaker 102a are SACE Tmax T1N1603P 125A, and the power supply of the main power line 101 and the backup power line 102 is 380V / 220V 50Hz.

[0039] Furthermore, a plurality of first oil pump motors 201 are sequentially connected to the main power line 101 , and the main line circuit breaker 101 a is located between the input end of the main power line 101 and the first oil pump motors 201 .

[0040] Furthermore, a plurality of second oil pump motors 202 are sequentially connected to the backup power line 102 , and the backup line circuit breaker 102 a is located between the input end of the backup power line 102 and the second oil pump motors 202 .

[0041] It should be noted that the models of the first oil pump circuit breaker 203 and the second oil pump circuit breaker 205 are both MS165-42, and the models of the first contactor 204 and the second contactor 206 are both ABB AC contactor AX50-30.

[0042] The control module 300 includes an input end circuit 301, a first branch circuit 302, a second branch circuit 303 and a first output end circuit 304, one end of the first branch circuit 302 is connected to the input end circuit 301, the other end of the first branch circuit 302 is connected to the first output end circuit 304, one end of the second branch circuit 303 is connected to the first branch circuit 302, and the other end of the second branch circuit 303 is connected to the first output end circuit 304.

[0043] Furthermore, a second output line 305 is connected between the input line 301 and the second branch line 303, and an air switch 306 is connected between the second output line 305 and the input line 301. It should be noted that the input line 301 and the second output line 305 can form a loop, which is closed or disconnected by the air switch 306. The loop is manually controlled to open and close, and the air switch 306 is a single-pole air switch 306, and its model is S201-C6.

[0044] Furthermore, the first branch line 302 and the second branch line 303 are connected to a switch 307. It should be noted that the switch 307 is used for switching between the first branch line 302 and the second branch line 303. The model of the switch 307 is KL-SB2.

[0045] The first branch line 302 is located between the conversion switch 307 and the first output end line 304 and is also connected in series with a manual switch 302a and a first relay group 302b;

[0046] The second branch line 303 is located between the conversion switch 307 and the first output end line 304 and is also connected in series with an automatic switch 303a and a second relay group 303b;

[0047] It should be noted that the manual switch 302a and the first relay group 302b on the first branch line 302 are locally controlled, and the automatic switch 303a and the second relay group 303b on the second branch line 303 are remotely controlled and switched by the transfer switch 307;

[0048] The first relay group 302b and the second relay group 303b are both composed of multiple relays connected in parallel;

[0049] Specifically, the first relay group 302b is composed of two relays K11 and K12, and the second relay group 303b is composed of two relays K14 and K15. K11 and K14 are main control relays, and K12 and K15 are relays with additional auxiliary contacts. The models of the above relays are ABB relays CR-MX230AC4L.

[0050] When in use, the main line circuit breaker 101a on the main power line 101 is manually closed, the backup line circuit breaker 102a on the backup power line 102 is disconnected, and then the first oil pump circuit breaker 203 is manually closed, and the start and stop of the first oil pump motor 201 is controlled by the first contactor 204 to operate the main equipment. When it is necessary to switch to the backup line, the main line circuit breaker 101a is manually disconnected, and the backup line circuit breaker 102a and the second oil pump circuit breaker 205 are manually closed. The start and stop of the backup second oil pump motor 202 is controlled by the second contactor 206 to operate the backup equipment. The process of controlling the start and stop of the contactor is as follows: during local control, the first branch line 302 is closed, the second branch line 303 is disconnected, and then the manual switch 302a and the relay K11 are closed by switching the switch; during remote control, the second branch line 303 is closed, the first branch line 302 is disconnected, and then the second manual switch and the relay K15 are closed by switching the switch. The above-mentioned contactor is connected to a solenoid valve, and the input end line 301 is connected to the power supply and the first output end line 304 to form a loop current. The circuit is connected and disconnected by the on-off power of the solenoid valve to control the start and stop of the oil pump motor.

[0051] In summary, this circuit adopts the main power supply and the backup power supply to carry their own loads, and at the same time adopts the method that the main and auxiliary equipment can serve as backup for each other, which solves the defects of the existing power supply circuit.

[0052] Importantly, it should be noted that the construction and arrangement of the present application shown in a plurality of different exemplary embodiments are only exemplary. Although only a few embodiments are described in detail in this disclosure, it should be readily understood by those who refer to this disclosure that many modifications are possible (e.g., the size, scale, structure, shape and ratio of various elements, and parameter values ​​(e.g., temperature, pressure, etc.), installation arrangements, use of materials, color, directional changes, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in the application. For example, the element shown as integrally formed can be composed of multiple parts or elements, the position of the element can be inverted or otherwise changed, and the nature or number or position of the discrete element can be changed or changed. Therefore, all such modifications are intended to be included in the scope of the present utility model. The order or sequence of any process or method steps can be changed or reordered according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and is not only structurally equivalent but also an equivalent structure. Without departing from the scope of the present invention, other substitutions, modifications, changes and omissions may be made in the design, operating conditions and arrangement of the exemplary embodiments. Therefore, the present invention is not limited to a specific embodiment, but extends to various modifications that still fall within the scope of the appended claims.

[0053] Additionally, in order to provide a concise description of example embodiments, all features of an actual embodiment (ie, those features that are not relevant to the best mode presently contemplated for carrying out the invention or those that are not relevant to implementing the invention) may not be described.

[0054] It will be appreciated that in the development of any actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort may be complex and time-consuming, but will be a routine task of design, fabrication, and production for those of ordinary skill having the benefit of this disclosure without undue experimentation.

[0055] It should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A coal mill power supply circuit, characterized in that: include, A power module (100) comprises a main power line (101) and a backup power line (102), wherein the main power line (101) is provided with a main line circuit breaker (101a), and the backup power line (102) is provided with a backup line circuit breaker (102a); The load module (200) comprises a plurality of first oil pump motors (201) connected to the main power line (101) and a plurality of second oil pump motors (202) connected to the backup power line (102), wherein a first oil pump circuit breaker (203) and a first contactor (204) are sequentially connected in series between the first oil pump motor (201) and the main power line (101) via a wire, and a second oil pump circuit breaker (205) and a second contactor (206) are sequentially connected in series between the second oil pump motor (202) and the backup power line (102) via a wire; A control module (300) is disposed in the first contactor (204) and the second contactor (206).

2. The coal mill power supply circuit according to claim 1, characterized in that: A plurality of the first oil pump motors (201) are connected to the main power line (101) in sequence, and the main line circuit breaker (101a) is located between the input end of the main power line (101) and the first oil pump motors (201).

3. The coal mill power supply circuit according to claim 2, characterized in that: A plurality of the second oil pump motors (202) are connected to the backup power line (102) in sequence, and the backup line circuit breaker (102a) is located between the input end of the backup power line (102) and the second oil pump motor (202).

4. The coal mill power supply circuit according to claim 1 or 3, characterized in that: The control module (300) comprises an input end circuit (301), a first branch circuit (302), a second branch circuit (303) and a first output end circuit (304), wherein one end of the first branch circuit (302) is connected to the input end circuit (301), the other end of the first branch circuit (302) is connected to the first output end circuit (304), one end of the second branch circuit (303) is connected to the first branch circuit (302), and the other end of the second branch circuit (303) is connected to the first output end circuit (304).

5. The coal mill power supply circuit according to claim 4, characterized in that: A second output end circuit (305) is also connected between the input end circuit (301) and the second branch circuit (303), and an air switch (306) is connected between the second output end circuit (305) and the input end circuit (301).

6. The coal mill power supply circuit according to claim 5, characterized in that: The first branch line (302) and the second branch line (303) are commonly connected to a conversion switch (307).

7. The coal mill power supply circuit according to claim 6, characterized in that: The first branch line (302) is located between the conversion switch (307) and the first output end line (304), and is also connected in series with a manual switch (302a) and a first relay group (302b).

8. The coal mill power supply circuit according to claim 7, characterized in that: The second branch line (303) is located between the conversion switch (307) and the first output end line (304), and is also connected in series with an automatic switch (303a) and a second relay group (303b).

9. The coal mill power supply circuit according to claim 8, characterized in that: The first relay group (302b) and the second relay group (303b) are both composed of a plurality of relays connected in parallel.

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