Temperature measuring resistance quick wiring box for bearing oil pan of water turbine generator

Abstract

The utility model relates to the field of generator temperature measurement, specifically disclose a kind of water turbine generator bearing oil basin temperature measuring resistance quick junction box, including the wireway body that temperature lead passes out, the side of wireway body is away from guide bearing oil basin and is open, still include connecting plate, connecting plate detachably installed at the side of wireway body open, the edge of connecting plate covers the open place of wireway body;Several quick connectors, quick connector is installed on connecting plate and is penetrated;Several first plug-in connectors that can be inserted with quick connector and cooperate;Several temperature measuring cables;Several second plug-in connectors that can be inserted with quick connector and cooperate.The scheme can be corresponding to the maintenance of first plug-in connector, second plug-in connector and quick connector and the connection of temperature lead and temperature measuring cable when carrying out temperature measuring cable and temperature lead maintenance, the distribution connection of temperature lead and temperature measuring cable is clear, more convenient for maintenance.

Description

Technical Field

[0001] This utility model relates to the field of generator temperature measurement technology, and in particular to a quick-connect junction box for a temperature measuring resistor in the bearing oil pan of a hydro-generator. Background Technology

[0002] In the field of power equipment, monitoring the temperature of the bearing shells (thrust, upper guide, and water guide) and the oil temperature in the oil pan of hydro-generators is crucial for the safe operation of the equipment. Currently, PT100 resistance temperature detectors (RTDs) are typically installed in the bearing shells of each hydro-generator unit's guide bearings. Temperature measurement wires are led out to a junction box on the side or top of the guide bearing's oil pan, and then connected to a computer monitoring system PLC via bolts for temperature data acquisition.

[0003] Traditional junction boxes often suffer from poor sealing, leading to oil mist and leakage. Furthermore, during maintenance, replacing the temperature sensing resistor requires dismantling tens of meters of temperature sensing cable, removing the junction box, and then rewiring and sealing. This repeated welding and wiring increases the workload and difficulty for maintenance personnel. Because traditional junction boxes use brass terminals for internal and external connections, the high speed of the bearings and the resulting rapid rotation of the turbine oil significantly impacts the internal temperature sensing terminals, affecting the stability of the temperature sensing resistor and the accuracy of signal acquisition. The brass terminal connection method is prone to temperature fluctuations during long-term unit operation, resulting in poor wiring reliability. Especially under long-term vibration during unit operation, the terminal screws are prone to loosening, causing poor contact, and the nut may fall into the bearing oil pan, endangering the safe and stable operation of the generator. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a quick-connect junction box for the temperature measuring resistor in the bearing oil pan of a hydro-generator. This solves the problem that when replacing the temperature measuring resistor during maintenance, it is necessary to first remove tens of meters of temperature measuring cable, then remove the junction box, and then rewire and seal it. This requires repeated welding and wiring during each maintenance, increasing the workload and difficulty for maintenance personnel.

[0005] To achieve the above objectives, the basic solution of this utility model is as follows: A quick-connect junction box for a temperature measuring resistor in a hydro-generator bearing oil pan, comprising a junction box body through which a temperature supply wire passes, the side of the junction box body away from the bearing oil pan being open, and further comprising:

[0006] The connecting plate is detachably installed on the open side of the junction box body, with the edge of the connecting plate covering the open side of the junction box body.

[0007] Several quick connectors are mounted through the connector plate;

[0008] Several first connectors that can be mated with quick connectors are mounted on the end of the thermal conductor near the connecting plate;

[0009] Several temperature measuring cables;

[0010] Several second connectors that can be mated with quick connectors are mounted on the end of the temperature measuring cable near the connecting plate.

[0011] The technical principle of this utility model is as follows: When inspecting the temperature measuring cable and temperature measuring wire, the first connector, the second connector, the quick connector, and the connection points with the temperature measuring wire and temperature measuring cable can be inspected one by one. The distribution and connection of the temperature measuring wire and temperature measuring cable are clear, making inspection easier, and there is no need to rewire after inspection. When inspecting a single temperature measuring wire and temperature measuring cable, only the first connector and the second connector are needed, eliminating the original tedious steps of stripping, connecting, and soldering.

[0012] The connection plate effectively enhances the stability of the first and second connectors and quick connectors at the connection points of the temperature measuring cable and the temperature conductor, effectively resisting vibration and impact, and preventing wiring breakage due to abnormal pulling of the temperature measuring cable, ensuring safe and reliable use. Simultaneously, the quick connector wiring method provides reliable and stable connections, ensuring reliable temperature measurement data transmission.

[0013] Furthermore, the connecting plate has several mounting holes running through it, and the outer wall of the middle part of the quick connector is threaded to the inner wall of the mounting holes.

[0014] With the above settings, the mounting holes and the threaded engagement of the quick connectors make the installation between the quick connectors and the connecting plate convenient and reliable, and also makes subsequent maintenance or replacement operations easier.

[0015] Furthermore, several mounting holes are evenly distributed along the surface of the connecting plate.

[0016] The above setup makes the distribution and installation of several temperature conductors and temperature measuring cables more orderly and neat.

[0017] Furthermore, it also includes a sealing gasket, which is installed on the side of the connecting plate near the junction box body, and the edge of the sealing gasket is pressed between the opening of the junction box body and the edge of the connecting plate.

[0018] With the above settings, the sealing gasket can cooperate with the connecting plate to achieve a full seal on the junction box body and prevent oil from entering.

[0019] Furthermore, the connecting plate is made of stainless steel.

[0020] The above settings ensure that the connecting plates are not easily deformed during unit maintenance and disassembly.

[0021] Furthermore, the quick connector has a first thread on the outer wall of both ends; a first nut that is threadedly connected to the first thread is rotatably installed on the end of the first connector, and a second nut that is threadedly connected to the first thread is rotatably installed on the end of the second connector.

[0022] With the above configuration, when connecting the quick connector and the first plug, the first plug is positioned opposite the end of the quick connector. Tightening the first nut causes it to engage with the first thread on the end of the quick connector, allowing the first nut to rotate relative to the first plug, and the first plug to be stably inserted into the end of the quick connector. The second plug can also be stably inserted into the end of the quick connector using the same method. The insertion and threaded engagement between the first and second plugs and the quick connector ensures precise, stable, and reliable contact between them.

[0023] Furthermore, it also includes:

[0024] First shielding cover;

[0025] The second cover can be assembled with the first cover to form the cover body. The second cover can be detachably connected to the first cover. The cover body can be installed on the edge of the connecting plate and the junction box body with a snap fastener. The edge of the cover body can abut against the side of the connecting plate and the junction box body. The joint between the second cover and the first cover is provided with a through groove for several temperature measuring cables to pass through.

[0026] With the above configuration, the second shield and the first shield are installed together around the connecting plate and the junction box body, which can further prevent oil from entering around the connecting plate and the junction box body, and also further prevent the second connector and the quick connector from being contaminated by oil; at the same time, it makes the routing of the temperature measuring cable neater. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the axial side structure of a quick-connect junction box for a water turbine generator bearing oil pan temperature measuring resistor in an embodiment of this utility model.

[0028] Figure 2 for Figure 1 A longitudinal sectional view of a quick-connect junction box for a bearing oil pan temperature measuring resistor in a hydro-generator.

[0029] Figure 3 for Figure 2 Enlarged view of a single second connector.

[0030] In the above figures: junction box body 10, temperature conductor 101, connecting plate 20, mounting hole 201, screw 202, quick connector 30, first thread 301, first plug 302, first nut 303, temperature measuring cable 304, second plug 305, second nut 306, anti-slip texture 307, sealing gasket 40, shielding cover body 50, first shielding cover 501, first ear plate 502, second shielding cover 503, second ear plate 504, bolt 505, nut 506, through groove 507. Detailed Implementation

[0031] The technical solution of this utility model will be further described below with reference to the accompanying drawings and embodiments.

[0032] This embodiment is basically as follows: Figure 1 , Figure 2 and Figure 3 As shown in the figure, this utility model embodiment proposes a quick junction box for a temperature measuring resistor in a hydro-generator bearing oil pan, including a junction box body 10 through which a temperature supply wire 101 passes, a connecting plate 20, a plurality of quick connectors 30, a plurality of first plugs 302 that can be plugged into the quick connectors 30, a plurality of temperature measuring cables 304, a plurality of second plugs 305 that can be plugged into the quick connectors 30, a sealing gasket 40, a first shielding cover 501 and a second shielding cover 503, and the right side of the junction box body 10 is open.

[0033] like Figure 1 and Figure 2 As shown, the connecting plate 20 is made of stainless steel, which ensures that the connecting plate 20 is not easily deformed during the maintenance and disassembly of the unit; the longitudinal section profile of the connecting plate 20 is in the shape of "]", the connecting plate 20 is snapped onto the right side of the open junction box body 10, the edge of the connecting plate 20 covers the open junction box body 10, and screws 202 connected to the junction box body 10 are installed around the connecting plate 20; at the same time, the sealing gasket 40 is installed on the side of the connecting plate 20 near the junction box body 10, and the edge of the sealing gasket 40 is pressed between the open junction box body 10 and the edge of the connecting plate 20.

[0034] like Figure 1 and Figure 2 As shown, a plurality of mounting holes 201 are provided through the connecting plate 20, and the plurality of mounting holes 201 are evenly arranged along the surface of the connecting plate 20; the quick connector 30 is a quick connector 30 with a stainless steel core, and the quick connector 30 is horizontally installed through the connecting plate 20, and the outer wall of the middle part of the quick connector 30 is threadedly connected to the inner wall of the mounting hole 201; the first connector 302 is installed on the end of the temperature measuring cable 101 near the connecting plate 20; the second connector 305 is installed on the end of the temperature measuring cable 304 near the connecting plate 20.

[0035] like Figure 1 and Figure 2 As shown, the quick connector 30 has a first thread 301 on the outer wall of both ends; a first nut 303, which is threadedly connected to the first thread 301, is rotatably mounted on the end of the first plug 302; as shown Figure 1 and Figure 3 As shown, a second nut 306 that is threadedly connected to the first thread 301 is rotatably mounted on the end of the second connector 305. Anti-slip textures 307 are provided on the outer walls of both the first nut 303 and the second nut 306.

[0036] like Figure 1 As shown, the second cover 503 can be assembled with the first cover 501 to form a cover body 50. The first cover 501 has two vertical sidewalls with first ear plates 502, and the second cover 503 has two vertical sidewalls with second ear plates 504. The first ear plates 502 can fit against the second ear plates 504, and a bolt 505 and a nut 506 threadedly connected to the bolt 505 are vertically installed between the first ear plate 502 and the second ear plate 504, thus achieving… The second shielding cover 503 is detachably connected to the first shielding cover 501; the longitudinal section profile of the shielding cover body 50 is also in the shape of "]", and the shielding cover body 50 can be installed on the edge of the connecting plate 20 and the junction box body 10 with a snap fastener, and the edge of the shielding cover body 50 can abut against the side of the connecting plate 20 and the junction box body 10; the joint between the second shielding cover 503 and the first shielding cover 501 is provided with a through groove 507 for several temperature measuring cables 304 to pass through.

[0037] In this embodiment, a quick-connect junction box for a hydro-generator bearing oil pan temperature measuring resistor is installed by first screwing several quick connectors 30 into the mounting holes 201 of the connecting plate 20, with the quick connectors 30 horizontally positioned, and then installing the sealing gasket 40 onto the left side of the connecting plate 20. Next, the first plug 302 is installed onto the left end of the temperature conductor 101, with the first plug 302 opposite to the left end of the quick connector 30. The first plug 302 is inserted into the left end of the quick connector 30, and the first nut 303 is screwed on, causing it to engage with the first thread 301 on the left end of the quick connector 30. At this time, the first nut 303 rotates relative to the first plug 302, and the first plug 302 is stably inserted into the left end of the quick connector 30. The connecting plate 20 is then installed over the opening of the junction box body 10, and the sealing gasket 40 is pressed between the connecting plate 20 and the junction box body 10. Finally, screws 202 are used to fix the connecting plate 20 and the junction box body 10 around its perimeter.

[0038] Then, the second connector 305 is installed on the left end of the temperature measuring cable 304, with the second connector 305 opposite to the right end of the quick connector 30. The second connector 305 is inserted into the right end of the quick connector 30, and the second nut 306 is screwed on so that the second nut 306 engages with the first thread 301 on the right end of the quick connector 30 for threaded connection. At this time, the second nut 306 rotates relative to the second connector 305, and the second connector 305 is stably inserted into the right end of the quick connector 30.

[0039] Finally, the second shielding cover 503 and the first shielding cover 501 are assembled and installed around the connecting plate 20 and the junction box body 10. Bolts 505 and nuts 506 are installed at the first ear plate 502 and the second ear plate 504, and several temperature measuring cables 304 pass through the through groove 507 to connect with the temperature measuring equipment.

[0040] During the above process, the connecting plate 20 and the cover body 50 in the shape of "]" can fully cover the opening of the junction box body 10 and can cooperate with the sealing gasket 40 to achieve a full seal on the junction box body 10 and prevent oil from entering.

[0041] Meanwhile, the cooperation between the first connector 302, the second connector 305, and the quick connector 30 makes the disassembly and connection between the temperature conductor 101 and the temperature measuring cable 304 convenient and stable. When performing maintenance on the connection of the temperature conductor 101 and the temperature measuring cable 304, the first connector 302, the second connector 305, the quick connector 30, and the connection points with the temperature conductor 101 and the temperature measuring cable 304 can be checked one by one. The distribution and connection of the temperature conductor 101 and the temperature measuring cable 304 are clear, making maintenance easier, and no rewiring is required after maintenance. When specifically maintaining a single temperature conductor 101 and temperature measuring cable 304, only the first connector 302 and the second connector 305 are needed, eliminating the original tedious steps of stripping, connecting, and soldering.

[0042] Meanwhile, the connection plate 20, the first shielding cover 501, and the second shielding cover 503 effectively improve the stability of the installation of the first connector 302, the second connector 305, and the quick connector 30 at the connection between the temperature conductor 101 and the temperature measuring cable 304. They can effectively resist vibration and impact, and prevent the wiring from breaking due to abnormal pulling of the temperature measuring cable 304, making it safe and reliable to use. At the same time, the quick connector 30 wiring method is reliable, the wiring is stable, and the temperature measuring data is reliable.

[0043] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A quick-connect junction box for a temperature-measuring resistor in a hydro-generator bearing oil pan, comprising a junction box body through which a heating wire passes, wherein the side of the junction box body away from the bearing oil pan is open, characterized in that, Also includes: A connecting plate, which is detachably installed on the open side of the junction box body, with the edge of the connecting plate covering the open side of the junction box body; Several quick connectors are mounted through the connector plate; Several first connectors that can be mated with quick connectors are mounted on the end of the thermal conductor near the connecting plate; Several temperature measuring cables; Several second connectors that can be mated with quick connectors are mounted on one end of the temperature measuring cable near the connecting plate.

2. The quick-connect junction box for temperature measuring resistance of a hydro-generator bearing oil pan as described in claim 1, characterized in that, The connecting plate has several mounting holes running through it, and the outer wall of the middle part of the quick connector is threaded to the inner wall of the mounting hole.

3. The quick-connect junction box for temperature measuring resistance of a hydro-generator bearing oil pan as described in claim 2, characterized in that, The mounting holes are evenly distributed along the surface of the connecting plate.

4. The quick-connect junction box for temperature measuring resistance of a hydro-generator bearing oil pan as described in claim 1, characterized in that, It also includes a sealing gasket, which is installed on the side of the connecting plate near the junction box body, and the edge of the sealing gasket is pressed between the opening of the junction box body and the edge of the connecting plate.

5. The quick-connect junction box for temperature measuring resistance of a hydro-generator bearing oil pan as described in claim 1, characterized in that, The connecting plate is made of stainless steel.

6. The quick-connect junction box for temperature measuring resistance of a hydro-generator bearing oil pan as described in claim 1, characterized in that, The quick connector has a first thread on the outer wall of both ends; a first nut that is threadedly connected to the first thread is rotatably installed on the end of the first connector, and a second nut that is threadedly connected to the first thread is rotatably installed on the end of the second connector.

7. A quick-connect junction box for measuring the temperature of a hydro-generator bearing oil pan as described in any one of claims 1-6, characterized in that, Also includes: First shielding cover; The second cover can be assembled with the first cover to form a cover body. The second cover can be detachably connected to the first cover. The cover body can be snapped onto the edge of the connecting plate and the junction box body. The edge of the cover body can abut against the side of the connecting plate and the junction box body. The joint between the second cover and the first cover is provided with a through groove for several temperature measuring cables to pass through.

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