Rotating speed distribution device

Abstract

The utility model relates to a rotating speed distribution device which comprises a circuit board module and a module support. The circuit board module is arranged on the module bracket; the circuit board module comprises a circuit board, a transformer, an input terminal strip and an output terminal strip; the input terminal strip comprises a plurality of input terminals; the transformer, the input terminal strip and the output terminal strip are arranged on the circuit board; the output terminal strip comprises a plurality of output terminals; the transformer comprises N coils, and N is greater than or equal to 2; each coil comprises two input ends and two output ends, and the two output ends of the coils are respectively connected with two output terminals of the output terminal strip; the coil is arranged on the circuit board; one input end of the first coil is connected with one input terminal of the input terminal strip, the input ends of two adjacent coils are sequentially connected in series, and the other input end of the last coil is connected with the other input terminal of the input terminal strip.

Description

Technical Field

[0001] The utility model relates to a distribution device, in particular to a rotation speed distribution device. Background Art

[0002] The turbine speed signal is a key signal for monitoring, controlling and protecting the safe operation of the turbine. The unit control system, monitoring system and local display all require the speed signal for monitoring, control and protection. Generally, the magnetic resistance probe installed on the speed gear bracket on the main shaft of the turbine measures the magnetic resistance signal and transmits it to the DCS, DEH and ETS control systems. Since the turbine speed gear bracket of the turbine unit is limited by the initial manufacturer's design, the installation position of the speed gear bracket is limited and there is no redundant installation position. If a speed probe needs to be installed for primary frequency modulation, DEH, ETS system optimization and other work, it will face great difficulties and even restrict further turbine-related transformation work. Therefore, a speed distribution device is needed. When the number of existing speed probes remains unchanged, multiple redundant speed signals are distributed through the distribution device to lay the foundation for the smooth development of turbine-related transformation and upgrading work. Utility Model Content

[0003] In order to solve the above problems, the purpose of the utility model is to provide a rotation speed distribution device, which converts an input rotation speed signal into multiple signals through multiple coils of a transformer, so as to increase redundant rotation speed signals.

[0004] The utility model discloses a rotation speed distribution device, comprising a circuit board module and a module bracket; the circuit board module is arranged on the module bracket; the circuit board module comprises a circuit board, a transformer, an input terminal block and an output terminal block; the input terminal block comprises a plurality of input terminals; the transformer, the input terminal block and the output terminal block are all arranged on the circuit board; the output terminal block comprises a plurality of output terminals; the transformer comprises N coils, N≥2; each coil comprises two input ends and two output ends, and the two output ends of the coil are respectively connected to the two output terminals of the output terminal block; the coil is arranged on the circuit board; an input end of the first coil is connected to an input terminal of the input terminal block, the input ends of two adjacent coils are connected in series in sequence, and the other input end of the last coil is connected to the other input terminal of the input terminal block.

[0005] Furthermore, the module bracket includes a cover plate and a support frame; the circuit board is provided with studs, the cover plate is provided with nuts matching the studs, the cover plate is arranged on the circuit board through the studs and nuts, and the circuit board is fixed on the support frame.

[0006] Furthermore, the material of the iron core of the coil is Permalloy.

[0007] Furthermore, a label for distinguishing the input terminal row from the output terminal row is provided on the circuit board or the cover plate.

[0008] Furthermore, the cover plate is a transparent plate, and the cover plate is provided with three openings, which respectively correspond to the transformer, the input terminal block and the output terminal block.

[0009] Furthermore, the support frame includes a bottom plate and two baffles, the two baffles are arranged on both sides of the bottom plate, and the circuit board is arranged on the bottom plate.

[0010] Furthermore, a slot is provided at the bottom end of the base plate, and the baffle is provided with a protrusion for fixing the circuit board.

[0011] Beneficial effects of the utility model:

[0012] In the rotation speed distribution device of the utility model, the coil of the transformer adopts Permalloy as the iron core material, which is not only small in size but also excellent in magnetic properties, and can effectively reduce output errors and improve measurement accuracy.

[0013] The speed distribution device of the utility model has a simple structure and is easy to use. It can transform a signal into multiple signals, thereby distributing multiple redundant speed signals while keeping the number of existing speed probes (signals) unchanged, thereby completing related transformation and upgrading work.

[0014] The utility model is provided with a module bracket, the cover plate of the module bracket can protect the components on the circuit board, and the bottom plate and the baffle plate of the module bracket play the role of protecting the circuit board and fixing the circuit board. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the utility model;

[0016] Figure 2 This is a schematic diagram of the utility model with the cover plate removed;

[0017] Figure 3 It is a schematic diagram of the principle of the utility model.

[0018] Description of Reference Numerals

[0019] 1. Circuit board, 2. Transformer, 3. Input terminal block, 4. Output terminal block, 5. Cover plate, 6. Stud, 7. Baffle. DETAILED DESCRIPTION

[0020] The following is a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings in the embodiments of the present invention. In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention can also be implemented in other ways different from those described herein, and those skilled in the art can make similar generalizations without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0021] The utility model aims to provide a rotation speed distribution device, which transforms an input rotation speed signal into multiple signals through multiple coils of a transformer, so as to increase the dissolution of the rotation speed signal.

[0022] The utility model discloses a rotation speed distribution device, comprising a circuit board module and a module bracket; the circuit board module is arranged on the module bracket, such as Figure 1 , Figure 2 shown.

[0023] The circuit board module includes a circuit board 1, a transformer, an input terminal block 3 and an output terminal block 4.

[0024] The input terminal block 3 includes several input terminals, which are used to connect signals. For example, the output signal (sine wave signal) of the steam turbine reluctance speed probe is connected to the input terminal, and the frequency represents the steam turbine speed. The output terminal block 4 includes several output terminals.

[0025] Transformer 2 is used to transform an input signal into multiple output signals. Transformer 2 includes N coils, N≥2, one coil represents an independently wound secondary side, each secondary side is used as a transformed output signal, and its output inductive resistance is about 550 Ώ. The number of turns of the coil winding ensures that the amplitude of the alternating signal of its inductive output is not less than the amplitude of the primary input signal, and is not greater than 1.2 times the amplitude of the primary input signal. Figure 3 As shown, it is the principle diagram of the utility model, in which the box on the left represents the turbine speed probe. The coil is arranged on the circuit board 1. The coil has two input ends and two output ends. The two output ends of the coil are respectively connected to the two output terminals of the output terminal row 4; one input end of the first coil is connected to an input terminal of the input terminal row 3, the input ends of the two adjacent coils are connected in series in sequence, and the other input end of the last coil is connected to the other input terminal of the input terminal row 3. For example: when N=3, there are a total of 6 output ends connected to the output terminal row. One input end of the first coil is connected to an input terminal of the input terminal row 3, the other input end of the first coil is connected to an input end of the second coil, the other input end of the second coil is connected to an input end of the third coil, and the other input end of the third coil is connected to the other input terminal of the input terminal row 3.

[0026] The material of the coil core is Permalloy. The transformer 2 with Permalloy as the core material is smaller in volume than the transformer with silicon steel sheet as the core material. Among the soft magnetic alloys, it is used for transformers 2 with no DC excitation or very small excitation under high magnetic induction. It has excellent magnetic properties, effectively reduces the output error after, and improves the measurement accuracy. By using these advantages of Permalloy transformer, the multi-channel output of the turbine speed probe signal is realized.

[0027] The transformer 2, the input terminal block 3 and the output terminal block 4 are all arranged on the circuit board 1. Preferably, the input terminal block 3 and the output terminal block 4 are respectively located at one end of the circuit board 1, and the coils of the transformer 2 are arranged side by side. Figure 2 In order to distinguish the terminals of the input terminal block 3 and the output terminal block 4, labels are provided on the circuit board 2 to mark these terminals.

[0028] The module bracket is a frame body for supporting the circuit board module. The module bracket includes a cover plate 5 and a support frame, such as Figure 1 As shown. The circuit board 1 is provided with a plurality of studs 6, and the cover plate 5 is provided with nuts matching the studs 6, and the cover plate 5 is provided on the circuit board 1 through the studs 6 and the nuts. In this embodiment, four studs 6 are provided, and the four studs 6 are respectively provided at the four corners of the circuit board 1, and the cover plate 5 is a transparent plate. The cover plate 5 is provided with three openings, and the three openings correspond to the transformer 2, the input terminal block 3 and the output terminal block 4 respectively. A label can also be provided on the cover plate 5.

[0029] The support frame includes a bottom plate and a baffle 7. The circuit board 1 is arranged on the bottom plate and can be detachably connected by nuts or other means. The baffle 7 is arranged on both sides of the bottom plate and is used to fix the circuit board 1. The bottom plate and the baffle 7 can also be detachably connected by nuts. The baffle 7 is provided with a protrusion for fixing the circuit board 1. A soft pad is also arranged on the baffle 7, and the soft pad is correspondingly bonded to one side connected to the bottom plate.

[0030] A slot is also provided at the bottom end of the bottom plate or baffle 7, and when in use, the utility model can be set on the guide rail of the electrical box through the slot. The shape and structure of the slot can be adopted from the existing ones (not shown in the figure).

[0031] The circuit board 1 may also be provided with a clamping ring, and two clamping rings are provided, corresponding to the input terminal row 3 and the output terminal row 4 respectively. When the connecting wire is connected to the input terminal row 3 or the output terminal row 4, the connecting wire first passes through the clamping ring and then connects to the terminal row, so as to ensure that the connection is as firm as possible.

[0032] After the distribution device of the utility model is applied to the unit, the speed signal used for display of the unit is distributed into three redundant signals, one of which is used for the original digital display, and one of the two is distributed into three redundant signals through a distribution device, so that a total of four redundant speed signals are obtained, which have been used in primary frequency modulation and related operating equipment of this framework. The signal is stable and the error is small, which has achieved good results.

[0033] Obviously, the described embodiments are only some embodiments of the utility model, not all embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

Claims

1. A rotation speed distribution device, characterized in that: It comprises a circuit board module and a module bracket; the circuit board module is arranged on the module bracket; the circuit board module comprises a circuit board, a transformer, an input terminal block and an output terminal block; the input terminal block comprises a plurality of input terminals; the transformer, the input terminal block and the output terminal block are all arranged on the circuit board; the output terminal block comprises a plurality of output terminals; the transformer comprises N coils, N≥2; each coil comprises two input ends and two output ends, and the two output ends of the coil are respectively connected to the two output terminals of the output terminal block; the coil is arranged on the circuit board; one input end of the first coil is connected to one input terminal of the input terminal block, the input ends of two adjacent coils are connected in series in sequence, and the other input end of the last coil is connected to the other input terminal of the input terminal block.

2. A rotation speed distribution device according to claim 1, characterized in that: The module bracket includes a cover plate and a support frame; the circuit board is provided with studs, the cover plate is provided with nuts matching the studs, the cover plate is arranged on the circuit board through the studs and nuts, and the circuit board is fixed on the support frame.

3. A rotation speed distribution device according to claim 1, characterized in that: The material of the iron core of the coil is Permalloy.

4. A rotation speed distribution device according to claim 2, characterized in that: The circuit board or the cover plate is provided with a label for distinguishing the input terminal row and the output terminal row.

5. A rotation speed distribution device according to claim 2, characterized in that: The cover plate is a transparent plate, and is provided with three openings, which respectively correspond to the transformer, the input terminal block and the output terminal block.

6. A rotation speed distribution device according to claim 2, characterized in that: The support frame comprises a bottom plate and two baffles, the two baffles are arranged on both sides of the bottom plate, and the circuit board is arranged on the bottom plate.

7. A rotation speed distribution device according to claim 6, characterized in that: A slot is arranged at the bottom end of the bottom plate, and a protrusion is arranged on the baffle plate for fixing the circuit board.

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