Power grid transformer substation GIS pipeline expansion joint deformation alarm scale

Abstract

The utility model discloses a power grid transformer station GIS pipeline expansion joint deformation alarm scale, which belongs to the transformer station maintenance technical field, and comprises a slide resistance scale, a vernier connecting rod, a vernier slide block and an alarm mechanism, the alarm mechanism comprises an alarm mechanism housing, a power supply and a buzzer alarm; the sliding resistance scale is a conductive scale with uniform resistance values, the sliding resistance scale is sleeved with a slidable vernier sliding block, the vernier sliding block is connected to an alarm mechanism shell through a vernier connecting rod, and the alarm mechanism shell is fixedly installed on a flange on one side of the telescopic joint in an insulated mode; one end of the sliding resistance scale is fixedly installed on the flange on the other side of the expansion joint in an insulated mode, and the other end of the sliding resistance scale is sequentially connected with the power source, the buzzer alarm and the vernier sliding block through leads to form an alarm loop. According to the utility model, the alarm loop is constructed, the current of the loop changes with the deformation of the expansion joint, the alarm is given according to the current change value, the overall structure principle is simple, and the function is convenient to realize.

Description

Technical Field

[0001] The utility model belongs to the technical field of transformer substation maintenance, and in particular relates to a deformation alarm scale for a GIS pipeline expansion joint of a power grid transformer substation. Background Art

[0002] The statements herein merely provide background art related to the present invention and do not necessarily constitute prior art.

[0003] GIS equipment is a gas-insulated metal-enclosed switchgear, which uses sulfur hexafluoride gas with excellent insulation and arc-extinguishing properties as the insulation and arc-extinguishing medium, and seals all high-voltage electrical components in a grounded metal cylinder. GIS technology has become the mainstream of contemporary high-voltage electrical appliances because of its advantages such as small footprint, all components are sealed and not affected by the environment, high operating reliability, and no electromagnetic interference. However, during the operation of GIS equipment, various loads can easily cause uneven deformation or even damage between the various parts of the tube busbar, which can easily cause leakage of sulfur hexafluoride gas. Among them, the temperature difference deformation caused by the large temperature difference between winter and summer in the GIS combined electrical equipment piping system, coupled with product quality and installation process, there are great safety hazards in weak locations such as the busbar flange joint. Once sulfur hexafluoride gas leaks, it will directly threaten the safe operation of GIS equipment and cause great harm to the safety of electrical equipment, personnel and the environment. In order to absorb the temperature difference deformation, flexible devices such as expansion joints are usually set in the GIS piping system to increase the overall flexibility of the piping system.

[0004] The expansion joint of the GIS pipeline is generally composed of a bellows, a mounting flange and a ruler. The ruler reading is usually used to read the size of the bellows deformation relative to the current observation time point during installation to prevent equipment accidents caused by excessive deformation. However, the current detection ruler cannot actively remind when the deformation exceeds the limit, and operation and maintenance personnel are required to conduct manual regular inspections, which requires considerable operation and maintenance manpower costs, and there are cases of misreading and missed readings. In addition, the existing expansion joint expansion detection device is complex in design, high in cost, and difficult to promote and use. Utility Model Content

[0005] In view of the above-mentioned problems and defects existing in the prior art, the utility model provides a grid substation GIS pipeline expansion joint deformation alarm scale, which has a simple overall structural principle, convenient function implementation and low cost. It can issue an alarm when the deformation of the expansion joint reaches or exceeds the maximum limit, and guide the operation and maintenance personnel to inspect the equipment in a targeted manner to avoid false detection and missed detection.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A grid substation GIS pipeline expansion joint deformation alarm scale, comprising a sliding resistance scale, a vernier connecting rod, a vernier slider and an alarm mechanism, wherein the alarm mechanism comprises an alarm mechanism housing, a power supply and a buzzer alarm;

[0008] The sliding resistance scale is a conductive scale with uniform resistance value. A slidable vernier slider is mounted on the sliding resistance scale. The vernier slider is connected to the alarm mechanism housing through a vernier connecting rod. The alarm mechanism housing is insulated and fixedly mounted on the flange on one side of the telescopic joint. One end of the sliding resistance scale is insulated and fixedly mounted on the flange on the other side of the telescopic joint. The other end of the sliding resistance scale is connected to a power supply, a buzzer alarm, and a vernier slider in sequence through leads to form an alarm circuit.

[0009] According to a further technical solution, one end of the cursor connecting rod is fixedly connected to the cursor sliding block, and the other end is fixedly connected to the alarm mechanism housing.

[0010] According to a further technical solution, the cursor connecting rod is made of insulating material.

[0011] A further technical solution is that the vernier slider includes two concave-shaped sliders with the same structure and symmetrically arranged up and down, the groove edges of the two sliders on the same side are fixedly connected by a vernier connecting rod, and the sliding resistance scale is embedded in the grooves of the upper and lower sliders.

[0012] According to a further technical solution, the cursor slider is made of conductive material.

[0013] According to a further technical solution, the expansion joint adopts a bellows.

[0014] According to a further technical solution, the power supply and buzzer alarm are both fixedly arranged inside the alarm mechanism housing.

[0015] According to a further technical solution, the housing of the alarm mechanism is made of insulating material.

[0016] According to a further technical solution, a plurality of connecting holes are provided on the housing of the alarm mechanism, and the leads pass in and out through the connecting holes.

[0017] According to a further technical solution, the sliding resistance scale is a scale with scales.

[0018] Compared with the prior art, the utility model has the following beneficial effects:

[0019] 1. The utility model provides a deformation alarm scale for the expansion joint of the GIS pipeline in a power grid substation. The sliding resistance scale is a conductive scale with uniform resistance value. The vernier slider set on the scale slides with the contraction or expansion of the expansion joint. During the sliding process, the current in the alarm circuit composed of the vernier slider, the sliding resistance scale, etc. also changes accordingly. When the current exceeds the preset current resting interval of the buzzer alarm, it is considered that the deformation of the expansion joint is too large. At this time, the buzzer beeps and flashes to give an alarm. The overall structural principle of the utility model is simple, the function is easy to realize, and the cost is low. It can give an alarm when the deformation of the expansion joint reaches or exceeds the maximum limit, and guide the operation and maintenance personnel to check the equipment in a targeted manner to avoid false detection and missed detection.

[0020] 2. The utility model has a simple structure, clear principle, can be effectively implemented, has a wide range of applications, and can be extended to the deformation warning and alarm of expansion joints of pipelines in various industries. While ensuring the smooth movement of the process and the slider, the failure rate of this device is low, the maintenance is simple, and the structure is simple and convenient for modification. It can also be integrated into the main control unit by adding a wireless module, and has strong scalability.

[0021] 3. The utility model can be used in the operation and maintenance of thermal expansion and contraction of GIS pipelines in power grid substations. The operation and maintenance personnel do not need to check all expansion joints in sequence, but only need to check the position that triggers the buzzer, which greatly reduces the workload of equipment operation and maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention.

[0023] Figure 1 It is a structural schematic diagram of the deformation alarm scale of the GIS pipeline expansion joint of the power grid substation described in the utility model;

[0024] Figure 2 The utility model Figure 1 Enlarged front view of the AA section;

[0025] Figure 3 It is a structural schematic diagram of the alarm scale of the utility model installed on the telescopic joint.

[0026] Among them, 1. Sliding resistance scale; 2. Vernier slider; 3. Vernier connecting rod; 4. Buzzer alarm; 5. Power supply; 6. Alarm mechanism housing. DETAILED DESCRIPTION

[0027] It should be noted that the following detailed descriptions are illustrative and are intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present application belongs.

[0028] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0029] The utility model proposes a deformation alarm scale for expansion joints of GIS pipelines in power grid substations, such as Figure 1 As shown, it includes a sliding resistance scale 1, a vernier connecting rod 3, a vernier slider 2 and an alarm mechanism, and the alarm mechanism includes an alarm mechanism housing 6, a power supply 5 and a buzzer alarm 4; wherein the sliding resistance scale 1 is a conductive scale with uniform resistance value, and a slidable vernier slider 2 is sleeved on the sliding resistance scale 1, and the vernier slider 2 is connected to the alarm mechanism housing 6 through the vernier connecting rod 3, as shown in FIG. Figure 3 As shown, the alarm mechanism housing 6 is insulated and fixedly mounted on the flange on one side of the telescopic joint, one end of the sliding resistance scale 1 is insulated and fixedly mounted on the flange on the other side of the telescopic joint, and the other end of the sliding resistance scale 1 is connected to the power supply 5, the buzzer alarm 4, and the cursor slider 2 in sequence through a lead wire (the lead wire is a conductive wire), thereby forming an alarm circuit.

[0030] The cursor connecting rod 3 is made of insulating material, one end of which is fixedly connected to the cursor slider 2, and the other end is fixedly connected to the alarm mechanism housing 6. Figure 2 As shown, the vernier slider 2 includes two concave sliders with the same structure and symmetrically arranged up and down. The groove edges of the two sliders on the same side are fixedly connected by a vernier connecting rod 3. The sliding resistance scale 1 is embedded in the grooves of the upper and lower sliders. The vernier slider can slide freely along the sliding resistance scale.

[0031] Furthermore, the alarm mechanism housing is also made of insulating material, a buzzer alarm and a power supply are fixedly arranged inside the alarm mechanism housing, and a plurality of connecting holes are arranged on the alarm mechanism housing, through which the leads pass in and out.

[0032] The above-mentioned sliding resistance scale 1 is a scale with scale, and the vernier slider 2 slides freely along both sides of the sliding resistance with scale. The vernier slider 2 is also made of conductive material. The vernier slider 2 is always in contact with the sliding resistance scale 1, and the vernier slider 2 passes through the connecting hole on the alarm mechanism housing through the lead wire, and is connected to the buzzer alarm and power supply fixed inside the alarm mechanism housing in turn. The lead wire led out of the power supply then passes through the connecting hole and is connected to the non-fixed end of the sliding resistance scale 1, thereby forming an alarm circuit. When the expansion joint expands, the slider 2 slides to the left, the part of the sliding resistance scale 1 in the alarm circuit increases, and then the resistance increases, and the alarm circuit current decreases; when the expansion joint contracts, the slider 2 slides to the right, the part of the sliding resistance scale 1 in the alarm circuit decreases, and then the resistance decreases, and the alarm circuit current increases; the buzzer alarm sets the current resting interval, if the current is too large or too small, that is, when the current in the alarm circuit exceeds the preset maximum value or is lower than the preset minimum value, it will trigger buzzing and flashing; further, the buzzer alarm is actually an existing current alarm with upper and lower limits that can be set, and it will alarm when the current exceeds the upper limit or is lower than the lower limit. In the utility model, the upper and lower limit preset values ​​of the current can be determined by testing with the sliding resistance scale. At the same time, the staff can read the corresponding deformation of the expansion joint at this time on the scaled sliding resistance scale. It should be pointed out that the minimum current value of the alarm circuit (i.e. the current value when the resistance value in the circuit is the largest) can also drive the operation of the buzzer alarm. The quiet interval of the buzzer alarm is set in advance. When the loop current value is within this interval, the buzzer runs but is in a quiet state. When the loop current value exceeds this interval, the buzzer runs and makes a sound and flashes.

[0033] Furthermore, the expansion joint adopts a bellows. When the bellows contracts due to cold, the slider 2 can slide to the left along the sliding resistance scale 1, and the resistance value increases; when the bellows stretches due to heat, the slider 2 can slide to the right along the sliding resistance scale 1, and the resistance value decreases, and the current in the alarm circuit also decreases and increases accordingly. When the current exceeds the preset maximum value or is lower than the preset minimum value, the buzzer alarm works, beeps and flashes at the same time, so as to remind the operation and maintenance personnel that the bellows expansion has reached the preset value.

[0034] As another implementation, the alarm mechanism housing can also be insulated and fixedly mounted on the cylinder wall on one side of the telescopic joint, and one end of the sliding resistance scale can be insulated and fixedly mounted on the cylinder wall on the other side of the telescopic joint.

[0035] The utility model proposes the above-mentioned grid substation GIS pipeline expansion joint deformation alarm scale, the sliding resistance scale is a conductive scale with uniform resistance value, the vernier slider set on the scale slides with the contraction or expansion of the expansion joint, and during the sliding process, the current in the alarm circuit composed of the vernier slider and the sliding resistance scale also changes accordingly. When the current exceeds the preset buzzer alarm current resting interval, it is considered that the deformation of the expansion joint is too large. At this time, the buzzer beeps and flashes to give an alarm; the overall structural principle of this device is simple, the function is easy to realize, and the cost is low. It can give an alarm when the deformation of the expansion joint reaches or exceeds the maximum limit, and guide the operation and maintenance personnel to check the equipment in a targeted manner to avoid false detection and missed detection.

[0036] Although the above describes the specific implementation methods of the utility model in combination with the accompanying drawings, it is not intended to limit the scope of protection of the utility model. Technical personnel in the relevant field should understand that on the basis of the technical solution of the utility model, various modifications or deformations that can be made by technical personnel in this field without creative work are still within the scope of protection of the utility model.

Claims

1. A deformation alarm scale for expansion joints of GIS pipelines in power grid substations, characterized in that: It includes a sliding resistance scale, a vernier connecting rod, a vernier slider and an alarm mechanism, wherein the alarm mechanism includes an alarm mechanism housing, a power supply and a buzzer alarm; The sliding resistance scale is a conductive scale with uniform resistance value. A slidable vernier slider is mounted on the sliding resistance scale. The vernier slider is connected to the alarm mechanism housing through a vernier connecting rod. The alarm mechanism housing is insulated and fixedly mounted on the flange on one side of the telescopic joint. One end of the sliding resistance scale is insulated and fixedly mounted on the flange on the other side of the telescopic joint. The other end of the sliding resistance scale is connected to a power supply, a buzzer alarm, and a vernier slider in sequence through leads to form an alarm circuit.

2. The grid substation GIS pipeline expansion joint deformation alarm scale according to claim 1, characterized in that: One end of the cursor connecting rod is fixedly connected to the cursor sliding block, and the other end is fixedly connected to the alarm mechanism housing.

3. The grid substation GIS pipeline expansion joint deformation alarm scale according to claim 2 is characterized in that: The vernier slider comprises two concave sliders with the same structure and symmetrically arranged up and down. The groove edges of the two sliders on the same side are fixedly connected by a vernier connecting rod, and the sliding resistance scale is embedded in the grooves of the upper and lower sliders.

4. The grid substation GIS pipeline expansion joint deformation alarm scale according to claim 1 is characterized in that: The cursor connecting rod is made of insulating material.

5. The grid substation GIS pipeline expansion joint deformation alarm scale according to claim 1 is characterized in that: The cursor slider is made of conductive material.

6. The grid substation GIS pipeline expansion joint deformation alarm scale according to claim 1, characterized in that: The expansion joint adopts a bellows.

7. The grid substation GIS pipeline expansion joint deformation alarm scale according to claim 1, characterized in that: The power supply and buzzer alarm are both fixedly arranged inside the alarm mechanism housing.

8. The grid substation GIS pipeline expansion joint deformation alarm scale according to claim 7, characterized in that: The alarm mechanism shell is made of insulating material.

9. The grid substation GIS pipeline expansion joint deformation alarm scale according to claim 8, characterized in that: The shell of the alarm mechanism is provided with a plurality of communication holes, and the lead wires pass in and out through the communication holes.

10. The grid substation GIS pipeline expansion joint deformation alarm scale according to claim 1, characterized in that: The sliding resistance ruler is a ruler with scales.

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