Signal detection device for water turbine generator set start-stop warning system

Abstract

This utility model discloses a signal detection device for a start-up and shutdown warning system of a hydro-generator set, comprising a housing, a connecting assembly installed on the left side of the housing, and a channel provided on the right side of the housing. One end of a lever is hinged inside the housing via a first pivot, and the other end of the lever extends out of the housing. An elastic element is installed inside the housing, and the lever is connected to the elastic element. When the end of the lever outside the housing swings downward, the elastic element can reset the lever. An insulating cylinder is installed on the lower side of the housing. A stationary contact block is fixedly installed on the upper side of the insulating cylinder, and a movable contact block is movably installed on the lower side. The upper end of a connecting rod is movably connected to the lever via a second pivot, and the lower end movably passes through the insulating cylinder and connects to the movable contact block. The stationary contact block is electrically connected to a stationary contact, and the movable contact block is electrically connected to a movable contact. When operating the isolating switch, the rotating arm of the isolating switch applies pressure to or releases the lever, thereby causing the movable contact block to contact or separate from the stationary contact block, thus providing a signal to the start-up and shutdown warning system.

Description

Technical Field

[0001] This utility model relates to the field of hydropower station safety protection technology, and in particular to a signal detection device for a hydro turbine generator set start-up and shutdown warning system. Background Technology

[0002] In power systems, hydroelectric power plants' turbine generator units need to adjust their output power in a timely manner according to the power grid dispatch plan. When cooperating with the grid for peak shaving, the turbine generator units need to be started or stopped. Currently, hydroelectric power plants generally rely on on-duty personnel to inspect relevant areas during start-up or shutdown. This method may result in other personnel being unaware of the current unit's operating status and mistakenly entering areas with rotational hazards, or personnel working in relevant areas failing to receive timely warnings and evacuate in time, leading to personal injury. Therefore, we have designed a turbine generator unit start-up and shutdown warning system. Electronic displays and audible and visual alarms are installed in areas with rotational hazards, such as slip ring chambers, wind tunnels, and turbine rooms, to warn personnel of safety precautions, prohibit entry into these areas, or warn personnel already in these areas to evacuate in time to avoid personal injury and ensure safety. This system requires signals based on the opening and closing of the generator outlet isolating switch. To avoid altering existing wiring, and based on the actual site conditions, we have proposed a signal detection device for the turbine generator unit start-up and shutdown warning system. Utility Model Content

[0003] The technical problem to be solved by this utility model is to address the problems existing in the background art and provide a signal detection device for a start-up and shutdown warning system of a hydro-generator unit. The signal detection device is installed on the base of the isolating switch. When the isolating switch is operated, the rotating arm of the isolating switch applies pressure to or releases the lever, thereby causing the moving contact block to contact or separate from the stationary contact block, thus providing a signal to the start-up and shutdown warning system.

[0004] To achieve the aforementioned technical features, the purpose of this utility model is as follows: A signal detection device for a start-up and shutdown warning system of a hydro-generator set includes a housing. A connecting assembly is installed on the left side of the housing, which is used to install onto the base of the generator outlet isolating switch. A channel is provided on the right side of the housing. One end of a lever is hinged inside the housing via a first pivot, and the other end of the lever extends out of the housing. An elastic element is installed inside the housing, and the lever is connected to the elastic element. When the end of the lever outside the housing swings downward, the elastic element can reset the lever. An insulating cylinder is installed on the lower side of the housing. A stationary contact block is fixedly installed on the upper side of the insulating cylinder, and a movable contact block is movably installed on the lower side. The upper end of a connecting rod is movably connected to the lever via a second pivot, and the lower end movably passes through the insulating cylinder and connects to the movable contact block. The stationary contact block is electrically connected to a stationary contact, and the movable contact block is electrically connected to a movable contact.

[0005] The connecting assembly includes a first plate and a second plate. The first plate is arranged longitudinally, and a hanging groove is provided on the outer side of its upper end. The second plate is arranged laterally, located outside the first plate. A slot is provided on the upper side of the second plate away from the first plate, and a longitudinal extension plate is provided on the lower side near the first plate. A through hole is provided on the extension plate. A screw is fixedly connected to the outer side of the lower end of the first plate. After the screw passes through the through hole, a locking nut is screwed on. The housing is fixedly connected to the first plate.

[0006] The housing has a support rod installed on its lower side near the connecting component. The lever has a notch or hole at one end inside the housing. The elastic element is a tension spring, with one end of the tension spring hanging on the support rod and the other end hanging in the notch or hole.

[0007] The lower side of the housing is provided with a nut sleeve, and the upper end of the insulating cylinder is provided with an external thread. The insulating cylinder and the nut sleeve are screwed together and fixed.

[0008] The stationary contact block is annular, and a first mounting position is provided on the upper side of the insulating cylinder. The stationary contact block is fixedly installed in the first mounting position, and the lower end of the connecting rod passes through the central hole of the stationary contact block and connects to the moving contact block.

[0009] The stationary contact is a screw structure. One end of the stationary contact is screwed radially into the insulating cylinder and then abuts against the stationary contact block.

[0010] The moving contact is also annular, and the lower end of the connecting rod is provided with an external thread section. The diameter of the external thread section is smaller than the diameter of the connecting rod. The moving contact is fitted onto the external thread section, and a limit nut is installed on the lower side of the external thread section.

[0011] A second mounting position is provided on the lower side inside the insulating cylinder. A conductive sleeve is fixedly installed in the second mounting position. The moving contact is slidably installed inside the conductive sleeve. The outer wall of the conductive sleeve is fixedly connected to the moving contact.

[0012] A compression spring is also installed between the moving contact block and the limiting nut.

[0013] The moving contact includes an insulating ring and a conductive ring cover. The insulating ring is fixedly installed inside the conductive ring cover. The central hole of the conductive ring cover is larger than the central hole of the insulating ring. The connecting rod passes through the insulating ring.

[0014] Compared with the prior art, the outstanding features of this utility model, which adopts the above technical solution, are: The connecting assembly of this invention is used to install on the base of the generator outlet isolating switch. When the isolating switch's rotating arm is not in contact with the lever, the elastic element pulls the lever back. At this time, the lever is limited by the housing on the upper side of the channel, keeping the lever in a lateral state. The stationary and moving contacts are separated, and they are not conductive. When the handwheel is turned clockwise, the rotating arm rotates clockwise, thus pressing down the lever. During the closing process, the lever swings clockwise, the elastic element is stretched, and the connecting rod is lifted. After closing, the stationary and moving contacts abut against each other, and they become conductive. This invention uses a signal detection device installed on the base of the isolating switch. When operating the isolating switch, the rotating arm applies pressure to or releases pressure on the lever, causing the moving contact to contact or separate from the stationary contact, thus providing a signal to the start / stop warning system. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0016] Figure 1 This is a schematic diagram of the main structure of this utility model.

[0017] Figure 2 This is a schematic diagram of the internal structure of this utility model.

[0018] Figure 3 This is a diagram showing the state of the switch when the lever is pressed down by the rotating arm of the knife switch during use of this utility model.

[0019] Figure 4 This is a schematic diagram of the main structure of the present invention installed on the knife switch base.

[0020] Figure 5 This is a left-side view of the structure of the present invention installed on the knife switch base.

[0021] Figure label: 1. Angle steel; 2. Crossbeam; 3. Knife switch; 4. Insulator; 5. Rotating arm; 6. Rotating shaft; 7. Handwheel. 10 housing, 11 channel, 12 first pivot, 13 elastic element, 14 support rod, 15 nut sleeve; 20 lever, 21 notch, 22 second pivot; Insulating cylinder 30, first mounting position 31, second mounting position 32, conductive sleeve 33, bottom cover 34; Stationary contact block 40, stationary contact head 41; Moving contact 50, insulating ring 501, conductive ring cover 502, moving contact 51; Connecting rod 60, compression spring 61, washer 62, limit nut 63; The connecting assembly 70 includes a first plate 71, a hanging groove 711, a screw 712, a second plate 72, a slot 721, an extension plate 722, and a locking nut 723. Detailed Implementation

[0022] 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.

[0023] It should be noted that the use of terms such as "an embodiment," "an embodiment," "an exemplary embodiment," and "some embodiments" in the specification indicates that the described embodiment may include a specific feature, structure, or characteristic, but not every embodiment necessarily includes that specific feature, structure, or characteristic. Furthermore, when a specific feature, structure, or characteristic is described in connection with an embodiment, implementing such a feature, structure, or characteristic in conjunction with other embodiments (whether explicitly described or not) should be within the knowledge of those skilled in the art.

[0024] Example 1: See Figure 1-5 A signal detection device for a start-up and shutdown warning system of a hydro-generator unit includes a housing 10. A connecting assembly 70 is installed on the left side of the housing 10, and a channel 11 is provided on the right side of the housing 10. One end of a lever 20 is hinged inside the housing 10 via a first pivot 12, and the other end of the lever 20 extends out of the housing 10. An elastic element 13 is installed inside the housing 10, and the lever 20 is connected to the elastic element 13. When the end of the lever 20 outside the housing 10 swings downward, the elastic element 13... The lever 20 can be pulled back to its original position; an insulating cylinder 30 is installed on the lower side of the housing 10, a stationary contact block 40 is fixedly installed on the upper side of the insulating cylinder 30, and a movable contact block 50 is movably installed on the lower side. The upper end of the connecting rod 60 is movably connected to the lever 20 through the second pivot 22, and the lower end moves through the insulating cylinder 30 and connects to the movable contact block 50. The stationary contact block 40 is electrically connected to the stationary contact 41 located on the insulating cylinder 30, and the movable contact block 50 is electrically connected to the movable contact 51 located on the insulating cylinder 30.

[0025] Connection component 70 is used for mounting to the base of the generator outlet isolating switch, specifically, see [link to details]. Figure 3 , 4 The connecting assembly 70 is mounted on the angle iron 1 on one side of the base. Both the stationary contact 40 and the moving contact 50 are made of conductive material, preferably copper. See also... Figure 2 , combined Figure 4When the isolating switch arm 5 is not in contact with the lever 20, the elastic element 13 pulls the lever 20 back. At this time, the lever 20 is limited by the housing 10 on the upper side of the channel 11, keeping the lever 20 in a lateral state. At this time, the stationary contact block 40 and the moving contact block 50 are in a separated state, and the stationary contact 41 and the moving contact 51 are not conductive. See also Figure 4 When handwheel 7 is turned clockwise, arm 5 rotates clockwise, thereby pressing down lever 20. During the closing process, see... Figure 3 When lever 20 swings clockwise, elastic element 13 is stretched and connecting rod 60 is lifted. After closing, stationary contact block 40 and moving contact block 50 abut against each other, and stationary contact 41 and moving contact 51 are connected.

[0026] This utility model uses a signal detection device installed on the base of the isolating switch. When the isolating switch is operated, the rotating arm of the isolating switch applies pressure to or releases the lever, thereby causing the moving contact block to contact or separate from the stationary contact block, thus providing a signal to the start / stop warning system.

[0027] In this embodiment, the housing 10 also has a hinge hole for mounting the first pivot 12. The connecting rod 60 is made of insulating material, such as a plastic rod. The upper end of the connecting rod 60 has a U-shaped groove, which is slidably engaged with the lever 20 and then movably connected via the second pivot 22.

[0028] In this embodiment, see Figure 2 The connecting assembly 70 includes a first plate 71 and a second plate 72. The first plate 71 is arranged longitudinally, and a hanging groove 711 is provided on the outer side of the upper end of the first plate 71. The second plate 72 is arranged laterally, located outside the first plate 71. A slot 721 is provided on the upper side of the end of the second plate 72 away from the first plate 71, and a longitudinal extension plate 722 is provided on the lower side of the end close to the first plate 71. A through hole is provided on the extension plate 722. A screw 712 is fixedly connected to the outer side of the lower end of the first plate 71. After the screw 712 passes through the through hole, a locking nut 723 is screwed on. The housing 10 is connected to the first plate 71 by bolts or welding.

[0029] See Figure 5 The diagram shows the connecting assembly 70 mounted on the angle steel 1 of the isolating switch base. During installation, the hanging slot 711 and the locking slot 721 are hooked onto the two sides of the angle steel 1, respectively. Then, the locking nut 723 is tightened to fix the first plate 71 and the second plate 72. When the locking nut 723 is loosened, the connecting assembly 70 can also slide and adjust its position on the angle steel 1.

[0030] See Figure 2A support rod 14 is mounted on the lower side of the housing 10 near the connecting assembly 70. A notch 21 or hole is provided at one end of the lever 20 located inside the housing 10. The elastic element 13 is a tension spring, with one end hooked onto the support rod 14 and the other end hooked into the notch 21 or hole. This structure enables the installation of the elastic element 13. (See also...) Figure 1 The support rod 14 can be inserted and fixed to the housing 10.

[0031] For easy connection and fixation of the insulating cylinder 30 and the housing 10, see [link / reference] Figure 3 A nut sleeve 15 is provided on the lower side of the housing 10, and an external thread is provided on the upper end of the insulating cylinder 30. The insulating cylinder 30 and the nut sleeve 15 are screwed together and fixed.

[0032] See Figure 2 The stationary contact block 40 is annular, and a first mounting position 31 is provided on the upper side inside the insulating cylinder 30. The stationary contact block 40 is interference-fitted with the first mounting position 31, and the stationary contact block 40 is fixedly installed in the first mounting position 31. The lower end of the connecting rod 60 passes through the central hole of the stationary contact block 40 and is connected to the moving contact block 50.

[0033] Furthermore, the stationary contact 41 has a screw structure. One end of the stationary contact 41 is threaded and radially screwed into the insulating cylinder 30, where it abuts against the stationary contact block 40. Specifically, the insulating cylinder 30 has a threaded hole at the position corresponding to the stationary contact block 40. The stationary contact 41 is threaded into this hole. When the stationary contact 41 is tightened, it presses firmly against the stationary contact block 40, which serves two purposes: firstly, it limits the position of the stationary contact block 40, and secondly, it enables conductivity between the stationary contact 41 and the stationary contact block 40. Both the stationary contact block 40 and the stationary contact 41 are made of copper, while the insulating cylinder 30 is made of bakelite or plastic.

[0034] See Figure 2 The movable contact 50 is also annular. The lower end of the connecting rod 60 is provided with an external thread section. The diameter of the external thread section is smaller than the diameter of the connecting rod 60. When the movable contact 50 is fitted onto the external thread section, a step is formed between the connecting rod 60 and the external thread section. A limit nut 63 is installed on the lower side of the external thread section to limit the movable contact 50.

[0035] In this embodiment, the moving contact 51 can be threaded onto the insulating cylinder 30, and the moving contact 51 and the moving contact block 50 can be electrically connected by a flexible wire. For example, one end of the wire is welded to the bottom of the moving contact block 50, and the other end of the wire extends downwards, passes around the bottom of the insulating cylinder 30, and is then welded to the moving contact 51.

[0036] Example 2: The difference between this embodiment and Implementation 1 is that, see [link to Implementation 1] Figure 2A second mounting position 32 is provided on the lower side inside the insulating cylinder 30. A conductive sleeve 33 is fixedly installed in the second mounting position 32 by interference fit. The moving contact 50 is slidably installed in the conductive sleeve 33, and the outer wall of the conductive sleeve 33 is welded to the moving contact 51. With this structure, the moving contact 50 and the moving contact 51 are connected by the conductive sleeve 33. With this method, no wire connection is required, and a bottom cover 34 can be installed at the bottom of the insulating cylinder 30 by screws.

[0037] In this embodiment, the conductive sleeve 33 does not contact the stationary contact block 40, and the inner diameter of the conductive sleeve 33 is not greater than the inner diameter of the first mounting position 31. The moving contact block 50, the moving contact 51, and the conductive sleeve 33 are all made of copper, and the moving contact block 50 and the conductive sleeve 33 have a relatively tight sliding fit.

[0038] Example 3: Based on Example 2, see Figure 2 The moving contact 50 includes an insulating ring 501 and a conductive ring cover 502. The insulating ring 501 is fixedly installed inside the conductive ring cover 502 with an interference fit. The center hole of the conductive ring cover 502 is larger than the center hole of the insulating ring 501. The connecting rod 60 passes through the insulating ring 501. Because the center hole of the conductive ring cover 502 is larger than the center hole of the insulating ring 501, the connecting rod 60 does not need to contact the conductive ring cover 502, and the connecting rod 60 can also be made of metal.

[0039] In this embodiment, an insulating ring 501 can also extend from the lower side of the conductive ring cover 502. The portion of the conductive ring cover 502 extending from the insulating ring 501 is axially cut open, expanding the portion of the conductive ring cover 502 extending from the insulating ring 501 outward. Since metal is elastic, the lower end of the conductive ring cover 502 can elastically contact the conductive sleeve 33, further improving the stability of conductivity.

[0040] Example 4: Based on Example 2 or 3, see Figure 2 A compression spring 61 is also installed between the moving contact block 50 and the limit nut 63. This ensures that even if the lever 20 rotates out of range clockwise, the connecting rod 60 will not break. When the lever 20 rotates out of range clockwise, see... Figure 3 There is still a certain amount of travel between the moving contact block 50 and the limit nut 63.

[0041] The working principle and steps of this utility model: When using this utility model, please refer to Figure 4 , 5The base of the isolating switch includes angle steel 1 on both sides and two crossbeams 2 connecting the angle steel 1 on both sides. The switch assembly is mounted on the two crossbeams 2. One end of the insulator 4 is hinged to the switch 3, and the other end is hinged to one end of the rotating arm 5. The other end of the rotating arm 5 is welded to the rotating shaft 6. The rotating shaft 6 is rotatably mounted on the angle steel 1 on both sides, and a handwheel 7 is mounted on one end of the rotating shaft 6. The connecting assembly 70 is mounted on the angle steel 1 on one side of the base, and the lever 20 extends below the rotating arm 5.

[0042] exist Figure 4 In the middle, when the rotating arm 5 of the isolating switch is not in contact with the lever 20, the elastic element 13 pulls the lever 20 back. At this time, the lever 20 is limited by the housing 10 on the upper side of the channel 11, keeping the lever 20 in a lateral state. At this time, if Figure 2 As shown, the stationary contact 40 and the moving contact 50 are in a separated state, and the stationary contact 41 and the moving contact 51 are not conducting.

[0043] When handwheel 7 is turned clockwise, arm 5 rotates clockwise, thus pressing down lever 20. During the closing process, lever 20 swings clockwise, elastic element 13 is stretched, and connecting rod 60 is lifted. After closing, stationary contact block 40 and moving contact block 50 abut against each other, and stationary contact 41 and moving contact 51 are connected. Figure 3 As shown.

[0044] See Figure 4 When the handwheel 7 is turned counterclockwise after the circuit breaker is closed, the rotating arm 5 also rotates counterclockwise, driving the insulator 4 to push open the knife switch 3. During the counterclockwise rotation of the rotating arm 5, the lever 20 is driven to rotate counterclockwise by the elastic force of the elastic element 13. When the lever 20 is limited by the housing 10 on the upper side of the channel 11, the lever 20 returns to its horizontal position. Figure 2 As shown.

[0045] By contacting or separating the moving contact 50 from the stationary contact 40, a signal can be provided to the start / stop warning system.

[0046] While specific embodiments of the present invention have been described above, those skilled in the art should understand that the specific embodiments described are merely illustrative and not intended to limit the scope of the present invention. Any modifications and variations made by those skilled in the art in accordance with the spirit of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. A signal detection device for a start-up and shutdown warning system of a hydro-generator unit, characterized in that: Includes a housing (10), on the left side of which a connecting assembly (70) is installed for mounting to the base of the generator outlet isolating switch; a channel (11) is provided on the right side of the housing (10), one end of a lever (20) is hinged inside the housing (10) via a first pivot (12), and the other end of the lever (20) extends out of the housing (10); an elastic element (13) is installed inside the housing (10), and the lever (20) is connected to the elastic element (13). When the end of the lever (20) is outside the housing (10) After swinging downwards, the elastic element (13) can reset the lever (20); an insulating cylinder (30) is installed on the lower side of the housing (10), a stationary contact block (40) is fixedly installed on the upper side of the insulating cylinder (30), and a movable contact block (50) is movably installed on the lower side. The upper end of the connecting rod (60) is movably connected to the lever (20) through the second pivot (22), and the lower end moves through the insulating cylinder (30) and is connected to the movable contact block (50). The stationary contact block (40) is electrically connected to the stationary contact (41), and the movable contact block (50) is electrically connected to the movable contact (51).

2. The signal detection device for a start-up and shutdown warning system of a hydro-generator unit according to claim 1, characterized in that: The connecting assembly (70) includes a first plate (71) and a second plate (72). The first plate (71) is arranged longitudinally, and a hanging groove (711) is provided on the outer side of the upper end of the first plate (71). The second plate (72) is arranged laterally, and the second plate (72) is located on the outer side of the first plate (71). A slot (721) is provided on the upper side of the second plate (72) away from the first plate (71), and a longitudinal extension plate (722) is provided on the lower side of the second plate (71). A through hole is provided on the extension plate (722). A screw (712) is fixedly connected to the outer side of the lower end of the first plate (71). After the screw (712) passes through the through hole, a locking nut (723) is screwed on. The housing (10) is fixedly connected to the first plate (71).

3. The signal detection device for a start-up and shutdown warning system of a hydro-generator unit according to claim 1, characterized in that: The housing (10) has a support rod (14) installed on the lower side near the connecting component (70). The lever (20) has a notch (21) or hole at one end inside the housing (10). The elastic element (13) is a tension spring, with one end of the tension spring hanging on the support rod (14) and the other end hanging in the notch (21) or hole.

4. The signal detection device for a start-up and shutdown warning system of a hydro-generator unit according to claim 1, characterized in that: The lower side of the housing (10) is provided with a nut sleeve (15), and the upper end of the insulating cylinder (30) is provided with an external thread. The insulating cylinder (30) and the nut sleeve (15) are screwed together and fixed.

5. The signal detection device for a start-up and shutdown warning system of a hydro-generator unit according to claim 1, characterized in that: The stationary contact block (40) is annular, and a first mounting position (31) is provided on the upper side inside the insulating cylinder (30). The stationary contact block (40) is fixedly installed in the first mounting position (31), and the lower end of the connecting rod (60) passes through the central hole of the stationary contact block (40) and is connected to the moving contact block (50).

6. The signal detection device for a start-up and shutdown warning system of a hydro-generator unit according to claim 5, characterized in that: The stationary contact (41) is a screw structure. One end of the stationary contact (41) is screwed into the insulating cylinder (30) radially after being threaded, and then abuts against the stationary contact block (40).

7. The signal detection device for a start-up and shutdown warning system of a hydro-generator unit according to claim 5 or 6, characterized in that: The movable contact (50) is also annular, and the lower end of the connecting rod (60) is provided with an external thread section. The diameter of the external thread section is smaller than the diameter of the connecting rod (60). The movable contact (50) is fitted onto the external thread section, and a limit nut (63) is installed on the lower side of the external thread section.

8. The signal detection device for a start-up and shutdown warning system of a hydro-generator unit according to claim 7, characterized in that: The lower side of the insulating cylinder (30) is provided with a second mounting position (32), and a conductive sleeve (33) is fixedly installed in the second mounting position (32). The moving contact (50) is slidably installed in the conductive sleeve (33), and the outer wall of the conductive sleeve (33) is fixedly connected to the moving contact (51).

9. The signal detection device for a start-up and shutdown warning system of a hydro-generator unit according to claim 7, characterized in that: A compression spring (61) is also installed between the moving contact block (50) and the limiting nut (63).

10. The signal detection device for a start-up and shutdown warning system of a hydro-generator unit according to claim 8, characterized in that: The moving contact (50) includes an insulating ring (501) and a conductive ring cover (502). The insulating ring (501) is fixedly installed inside the conductive ring cover (502). The center hole of the conductive ring cover (502) is larger than the center hole of the insulating ring (501). The connecting rod (60) passes through the insulating ring (501).

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