A ring-shaped distributed sensory finger structure and a plum blossom-shaped sensory finger pressure tester

Abstract

This utility model discloses a ring-shaped distributed sensing finger structure, including a circular panel. Several radial grooves are arranged on the front of the panel, and a slider slides within these grooves. An arc plate is fixedly mounted on the end face of the slider away from the panel. Several arc plates are connected end-to-end to form a ring, and the arc plate is connected to a power unit. The ring-shaped distributed sensing finger structure and the plum blossom finger pressure tester described in this utility model include multiple arc plates connected end-to-end to form a ring. A plum blossom finger is fitted onto the outside of the ring formed by the arc plates. The power unit pushes the slider radially outward, causing the outer circumference of the arc plate to expand outward and make tight contact with the inner side of the plum blossom finger's contact plate. This design facilitates installation and prevents damage to the plum blossom finger.

Description

Technical Field

[0001] This utility model relates to the field of power detection device technology, and more specifically, to a ring-shaped distributed induction finger structure and a plum blossom finger pressure tester. Background Technology

[0002] In power systems, high-voltage switchgear is a critical piece of equipment for power transmission, and the luffing contact finger is one of the key components of this switchgear. The magnitude and stability of the clamping force of the luffing contact finger directly affect the contact resistance of the main circuit for high-current power transmission, and this resistance value determines the degree of heating at the contact point. The luffing contact finger operates in an environment with a certain temperature rise. This temperature rise is caused by the contact resistance and the current-carrying capacity of the conductor's own circuit resistance. The spring responsible for providing the clamping force undergoes creep and stress relaxation after prolonged exposure to high temperatures and fatigue. Creep and stress relaxation lead to a decrease in pressure at the contact point. When the pressure decreases to a certain level, the contact resistance increases upwards from an inflection point, causing a rapid increase in temperature, accelerating creep and stress relaxation, creating a vicious cycle, and ultimately leading to serious failures due to overheating. Therefore, a contact finger pressure tester is needed to test the pressure attenuation caused by the spring's creep and stress deformation.

[0003] The existing finger pressure tester has a disc-shaped finger structure that cannot be expanded outwards. When installing the pentagonal finger, it is necessary to expand the pentagonal finger, which is inconvenient and can easily damage the pentagonal finger.

[0004] Therefore, it is necessary to propose a ring-shaped distributed sensing finger structure to solve the problems existing in the prior art. Utility Model Content

[0005] The utility model description section introduces a series of simplified concepts, which will be further explained in detail in the detailed description section. This utility model description section is not intended to limit the key features and essential technical features of the claimed technical solution, nor is it intended to determine the scope of protection of the claimed technical solution.

[0006] To solve the above problems, this utility model provides a ring-shaped distributed sensor finger structure, including a panel. The panel is circular, and several grooves are arranged radially on the front side of the panel. A slider is slidably arranged in the grooves. An arc plate is fixedly arranged on the end face of the slider away from the panel. Several arc plates are connected end to end to form a ring. The arc plate is connected to a power unit for transmission.

[0007] Preferably, the power unit includes a hydraulic disc fixedly mounted on the back of the panel. Several hydraulic rod holes are radially opened on the outer circumference of the hydraulic disc. The positions of the hydraulic rod holes correspond to the positions of the slide grooves. A hydraulic rod is slidably mounted inside the hydraulic rod holes. A connecting block is fixedly mounted on one end of the hydraulic rod extending outside the hydraulic rod hole. The connecting block passes through the panel and is detachably connected to the slide groove.

[0008] Preferably, a sealing groove is formed on the circumferential surface of one end of the hydraulic rod located inside the hydraulic rod hole, and a sealing ring is installed in the sealing groove.

[0009] Preferably, a hydraulic chamber is formed in the center of the hydraulic plate, the hydraulic chamber is connected to the hydraulic rod hole, and an inlet is formed on the side wall of the hydraulic chamber away from the panel.

[0010] Preferably, a high-pressure connector is provided on the liquid inlet, and the high-pressure connector is connected to the hydraulic pump through a high-pressure pipe, with a solenoid valve installed on the high-pressure pipe.

[0011] Preferably, an elongated hole is formed radially on the panel at a position corresponding to the slide groove, the connecting block passes through the elongated hole and connects with the slider, and the connecting block is slidably disposed in the elongated hole.

[0012] Preferably, the slide groove is a T-shaped groove formed by two L-shaped slide rails fixedly installed on the front of the panel and the front of the panel together. The slider has a T-shaped cross-section, which is adapted to the shape of the T-slot.

[0013] Preferably, a pressure sensor is fixedly installed on the outer circumference of the arc plate, and multiple pressure sensors are arranged in an array along the circumferential direction of the arc plate.

[0014] Preferably, the slider and the arc plate are made of insulating material.

[0015] This utility model also provides a plum blossom finger pressure tester, including a housing and the annular distributed sensor finger structure in the above technical solution, wherein the panel of the annular distributed sensor finger structure is fixedly connected to the housing.

[0016] Compared with the prior art, the present invention has at least the following beneficial effects: The annular distributed sensing finger structure and plum blossom finger pressure tester of this utility model include multiple arc plates connected end to end to form a ring. The plum blossom finger is fitted on the outside of the ring formed by the arc plates. The slider is pushed outward radially by the power unit, so that the outer circumference of the arc plate expands outward and makes close contact with the inner side of the contact plate of the plum blossom finger. It is easy to install and can also prevent damage to the plum blossom finger.

[0017] The ring-shaped distributed sensor finger structure of this utility model, other advantages, objectives and features of this utility model will be partly apparent from the following description, and partly understood by those skilled in the art through study and practice of this utility model. Attached Figure Description

[0018] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the ring-shaped distributed sensor finger structure disclosed in this utility model. Figure 2 This is a schematic diagram of the annular distributed sensor finger structure after the arc plate is expanded according to this utility model. Figure 3 This is a schematic diagram of the back of the annular distributed sensor finger structure disclosed in this utility model. Figure 4 This is a cross-sectional structural schematic diagram of the power unit disclosed in this utility model; Figure 5 This is a schematic diagram of the structure of the hydraulic disc disclosed in this utility model; Figure 6 This is a schematic diagram of the structure of the hydraulic rod disclosed in this utility model; Figure 7 This is a schematic diagram of the panel and slide groove disclosed in this utility model; Figure 8 This is a schematic diagram of the plum blossom finger pressure tester disclosed in this utility model.

[0019] Among them, 1. panel, 2. slide groove, 3. slider, 4. arc plate, 5. hydraulic plate, 6. hydraulic rod hole, 7. hydraulic rod, 8. connecting block, 9. sealing groove, 10. sealing ring, 11. hydraulic chamber, 12. liquid inlet, 13. elongated hole, 14. L-shaped slide rail, 15 housing. Detailed Implementation

[0020] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments, so that those skilled in the art can implement it based on the description.

[0021] It should be understood that terms such as “having,” “comprising,” and “including” as used herein do not exclude the presence or addition of one or more other elements or combinations thereof.

[0022] like Figures 1-8 As shown, a ring-shaped distributed sensor finger structure includes a panel 1, which is circular. Several grooves 2 are arranged radially on the front side of the panel 1. A slider 3 is slidably arranged in the grooves 2. An arc plate 4 is fixedly arranged on the end face of the slider 3 away from the panel 1. Several arc plates 4 are connected end to end to form a ring. The arc plate 4 is connected to the power unit for transmission.

[0023] Furthermore, the power unit includes a hydraulic disc 5 fixedly mounted on the back of the panel 1. Several hydraulic rod holes 6 are radially opened on the outer circumference of the hydraulic disc 5. The positions of the hydraulic rod holes 6 correspond to the positions of the slide groove 2. A hydraulic rod 7 is slidably mounted in the hydraulic rod hole 6. A connecting block 8 is fixedly mounted on one end of the hydraulic rod 7 extending outside the hydraulic rod hole 6. The connecting block 8 passes through the panel 1 and is detachably connected to the slide groove 2.

[0024] Furthermore, a sealing groove 9 is formed on the circumferential surface of one end of the hydraulic rod 7 located inside the hydraulic rod hole 6, and a sealing ring 10 is provided inside the sealing groove 9.

[0025] Furthermore, a hydraulic chamber 11 is provided in the center of the hydraulic plate 5, and the hydraulic chamber 11 is connected to the hydraulic rod hole 6. An inlet 12 is provided on the side wall of the hydraulic chamber 11 away from the panel 1.

[0026] Furthermore, a high-pressure connector is provided on the liquid inlet 12, and the high-pressure connector is connected to the hydraulic pump through a high-pressure pipe, on which a solenoid valve is installed.

[0027] Furthermore, an elongated hole 13 is radially formed on the panel 1 at a position corresponding to the slide groove 2. The connecting block 8 passes through the elongated hole 13 and is connected to the slider 3, and the connecting block 8 is slidably disposed in the elongated hole 13.

[0028] Furthermore, the slide 2 is a T-shaped groove formed by two L-shaped slide rails 14 fixedly installed on the front of the panel 1 and the front of the panel 1 together. The cross-section of slider 3 is T-shaped, which is compatible with the shape of the T-slot.

[0029] Furthermore, a pressure sensor is fixedly installed on the outer circumference of the arc plate 4, and multiple pressure sensors are arranged in an array along the circumferential direction of the arc plate 4.

[0030] Furthermore, slider 3 and arc plate 4 are made of insulating material.

[0031] A plum blossom finger pressure tester includes a housing 15 and the annular distributed sensor finger structure described above, wherein the panel 1 of the annular distributed sensor finger structure is fixedly connected to the housing 15.

[0032] The working principle of the above technical solution: Because a decrease in the contact pressure of the pendulum finger leads to an increase in contact resistance, when the pressure decreases to a certain level, a turning point occurs in the increasing contact resistance trend. This increased resistance causes the pendulum finger to heat up, which in turn raises the temperature of the spring providing clamping force. This accelerates spring creep and stress relaxation, further reducing pressure and creating a vicious cycle that can easily lead to serious malfunctions. To avoid this turning point in the increasing contact resistance trend caused by decreasing contact pressure, a pendulum pressure tester is used to measure the pressure decay caused by spring creep and deformation during pendulum operation. This allows for early detection of contact pressure changes from a mechanical force perspective, thus avoiding the potential danger of resistance increasing upwards at a turning point and preventing catastrophic accidents.

[0033] Because the plum blossom-shaped contact finger is composed of multiple contact pieces arranged in a circumferential direction, the existing pressure tester has a large circumferential spacing between the test contact finger structure that contacts the contact pieces, resulting in some contact pieces not being able to be effectively tested.

[0034] The annular distributed sensing touch structure of this application includes a panel 1, which is circular. Several grooves 2 are arranged radially on the front side of the panel 1. A slider 3 is slidably arranged in the grooves 2. An arc plate 4 is fixedly arranged on the end face of the slider 3 away from the panel 1. Several arc plates 4 are connected end to end to form a ring. The arc plate 4 is connected to a power unit for transmission. The pendulum touch is fitted on the outside of the ring formed by the arc plate 4. The power unit pushes the slider 3 radially outward, so that the outer circumferential surface of the arc plate 4 is in close contact with the contact plate of the pendulum touch, which can test the contact pressure more accurately. The slider 3 and the arc plate 4 are made of insulating material. At this time, the pendulum touch can be in the running state, which can test the contact pressure of the pendulum touch in operation more accurately.

[0035] The power unit includes a hydraulic disc 5 fixedly mounted on the back of the panel 1. Several hydraulic rod holes 6 are radially formed on the outer circumference of the hydraulic disc 5. The positions of the hydraulic rod holes 6 correspond to the positions of the slide grooves 2. A hydraulic rod 7 is slidably mounted inside the hydraulic rod holes 6. The hydraulic rod 7 is sealed to the hydraulic rod holes 6 to prevent hydraulic oil from overflowing. The sealing connection can use a sealing ring. A sealing groove can be formed on the outer circumference of the hydraulic rod 7, and a sealing ring can be placed in the sealing groove. The sealing ring can be a general-purpose sealing ring with a diameter suitable for the hydraulic rod 7. A connecting block 8 is fixedly mounted on one end of the hydraulic rod 7 that extends outside the hydraulic rod holes 6. The connecting block 8 passes through the panel 1 and is detachably connected to the slider 3. The connecting block 8 and the slider 3 can be connected using screws.

[0036] The slide groove 2 can be formed by two opposing L-shaped slide rails 14 surrounding the front panel wall of the panel 1 to form a T-shaped groove. The L-shaped slide rails are fixedly installed on the front side of the panel 1. The slider 3 has a T-shaped cross-section, which matches the shape of the T-shaped slide groove 2. Setting the slide groove 2 as a T-shaped groove can improve the stability of the slider 3 when sliding in the slide groove 2 and prevent the slider 3 from swinging or shaking. The slide groove 2 can also be set as a groove on the front side of the panel 1, or the L-shaped slide rails surrounding the slide groove 2 can be set as straight plates, and the shape of the slider 3 can match the shape of the slide groove 2.

[0037] An elongated hole 13 is radially formed on panel 1 at a position corresponding to the slide groove 2. A connecting block 8 passes through the elongated hole 13 and connects to the slider 3, with the connecting block 8 slidably positioned within the elongated hole 13. After the plum blossom-shaped contact finger is fitted onto the outer circumference of the ring formed by the arc plate 4, the hydraulic pump and solenoid valve are activated. The solenoid valve connects the high-pressure pipe, and the hydraulic pump injects hydraulic oil into the hydraulic chamber 11. The hydraulic oil moves radially outward by squeezing the hydraulic rod 7 within the hydraulic rod hole 6. The hydraulic rod 7, through the connecting block 8, drives the slider 3 to move towards the end furthest from the center of panel 1, causing the ring formed by the arc plates 4 to... The outer circumferential surface of the arc plate 4 is in close contact with the plum blossom contact finger. The pressure sensor on the arc plate 4 detects the contact pressure. Multiple pressure sensors can be set along the circumferential direction of the arc plate 4, and their positions can correspond to the positions of the contact pieces of the plum blossom contact finger. When assembling the plum blossom contact, the positions of the contact pieces and the pressure sensors are aligned. The pressure sensor can be a surface-mount pressure sensor, which can be directly pasted on the arc surface of the arc plate 4. A model of surface-mount pressure sensor with dimensions and detection range that matches the contact pressure can be selected from general models.

[0038] Since the hydraulic oil pressure on each hydraulic rod 7 is the same, the pressure on each arc plate 4 on the plum blossom contact finger is also the same, thus ensuring that the pressure on the plum blossom contact finger is the same in all directions, improving the accuracy of detection.

[0039] A high-pressure connector is fixedly connected to the inlet 12. A threaded connection can be used to attach the high-pressure connector to the inlet 12. A high-pressure pipe is connected between the high-pressure connector and the hydraulic pump. A solenoid valve is installed on the high-pressure pipe to control its opening or closing. The hydraulic chamber 11 is pre-filled with hydraulic oil. When the arc plate 4 expands, the hydraulic pump injects hydraulic oil into the hydraulic chamber 11, causing the arc plate 4 to expand outwards. When the arc plate 4 reaches the designated position, the solenoid valve and the hydraulic pump are closed. The solenoid valve prevents hydraulic oil backflow, keeping the arc plate 4 in its moved position. The designated position of the arc plate 4 is determined by the expansion distance required by the plum blossom finger.

[0040] A hydraulic oil tank can be installed on the inner wall of the bottom of the housing 15. The hydraulic oil tank is connected to the hydraulic pump and is used to supply oil to the hydraulic pump and collect the hydraulic oil returned by the hydraulic pump. The hydraulic pump is a bidirectional hydraulic pump, which can both inject hydraulic oil into the hydraulic chamber 11 and extract hydraulic oil from the hydraulic chamber 11. When the test is completed, the hydraulic pump extracts part of the hydraulic oil from the hydraulic chamber 11, the pressure in the hydraulic chamber 11 decreases, and the hydraulic rod 7 moves towards the center of the hydraulic chamber 11 under the action of external atmospheric pressure, driving the arc plate 4 to reset through the connecting block 8 and the slider 3. The hydraulic pump can be selected from general-purpose bidirectional hydraulic pumps with shapes, power and other performance characteristics suitable for the plum blossom finger pressure tester.

[0041] The hydraulic oil tank can be set as a sealed structure to prevent hydraulic oil leakage. Since the arc plate 4 moves a small distance, the amount of hydraulic oil used is also small. The pressure change inside the sealed hydraulic oil tank is small, which can ensure the safe use of the hydraulic oil tank. A level gauge can be installed on the outside of the hydraulic oil tank to measure the amount of oil in the hydraulic oil tank.

[0042] Taking the 4000A pendulum contact finger as an example, before installing the pendulum contact finger, the diameter of the ring formed by the arc plate 4 is 107mm. After installing the pendulum contact finger, the arc plate moves outward by 2mm, and the error of the moving distance is within 0.1mm.

[0043] The processor can be fixedly installed on the inner wall of the housing 15. The pressure sensor is electrically connected to the processor. The processor can transmit the data transmitted by the pressure sensor via wired or wireless means. The data transmission by the processor is existing technology and will not be described in detail here.

[0044] The beneficial effects of the above technical solution are as follows: The annular distributed sensing finger structure and plum blossom finger pressure tester of this utility model include multiple arc plates connected end to end to form a ring. The plum blossom finger is fitted on the outside of the ring formed by the arc plates. The slider is pushed outward radially by the power unit, so that the outer circumference of the arc plate expands outward and makes close contact with the inner side of the contact plate of the plum blossom finger. It is easy to install and can also prevent damage to the plum blossom finger.

[0045] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0046] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0047] Although the embodiments of this utility model have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for this utility model. For those skilled in the art, other modifications can be easily made. Therefore, without departing from the general concept defined by the claims and their equivalents, this utility model is not limited to the specific details and the illustrations shown and described herein.

Claims

1. A ring-shaped distributed sensor finger structure, characterized in that, Includes a panel (1), which is circular. Several grooves (2) are arranged radially on the front of the panel (1). A slider (3) is slidably arranged in the groove (2). An arc plate (4) is fixedly arranged on the end face of the slider (3) away from the panel (1). Several arc plates (4) are connected end to end to form a ring. The arc plate (4) is connected to the power unit for transmission.

2. The ring-shaped distributed sensor finger structure according to claim 1, characterized in that, The power unit includes a hydraulic disc (5) fixedly mounted on the back of the panel (1). Several hydraulic rod holes (6) are radially opened on the outer circumference of the hydraulic disc (5). The position of the hydraulic rod holes (6) corresponds to the position of the slide groove (2). A hydraulic rod (7) is slidably mounted in the hydraulic rod hole (6). A connecting block (8) is fixedly mounted at one end of the hydraulic rod (7) extending outside the hydraulic rod hole (6). The connecting block (8) is detachably connected to the panel (1) and the slide groove (2).

3. The ring-shaped distributed sensor finger structure according to claim 2, characterized in that, A sealing groove (9) is opened on the circumferential surface of one end of the hydraulic rod (7) located in the hydraulic rod hole (6), and a sealing ring (10) is set in the sealing groove (9).

4. The ring-shaped distributed sensor finger structure according to claim 3, characterized in that, A hydraulic chamber (11) is opened in the center of the hydraulic plate (5). The hydraulic chamber (11) is connected to the hydraulic rod hole (6). An inlet (12) is opened on the side wall of the hydraulic chamber (11) away from the panel (1).

5. The ring-shaped distributed sensor finger structure according to claim 4, characterized in that, A high-pressure connector is installed on the inlet (12). The high-pressure connector is connected to the hydraulic pump through a high-pressure pipe. A solenoid valve is installed on the high-pressure pipe.

6. The ring-shaped distributed sensor finger structure according to claim 5, characterized in that, An elongated hole (13) is radially opened on the panel (1) at the position corresponding to the slide groove (2). The connecting block (8) passes through the elongated hole (13) and connects with the slider (3), and the connecting block (8) is slidably disposed in the elongated hole (13).

7. The ring-shaped distributed sensor finger structure according to claim 6, characterized in that, The slide (2) is a T-shaped groove formed by two L-shaped slide rails (14) fixedly set on the front of the panel (1) and the front of the panel (1); The cross-section of the slider (3) is T-shaped, which is compatible with the shape of the T-groove.

8. The ring-shaped distributed sensor finger structure according to claim 7, characterized in that, A pressure sensor is fixedly installed on the outer circumference of the arc plate (4), and multiple pressure sensors are arranged in an array along the circumference of the arc plate (4).

9. The ring-shaped distributed sensor finger structure according to claim 1, characterized in that, The slider (3) and the arc plate (4) are made of insulating material.

10. A plum blossom finger pressure tester, comprising a housing (15) and a ring-shaped distributed sensing finger structure as described in any one of claims 1-9, characterized in that, The panel (1) of the annular distributed sensor finger structure is fixedly connected to the housing (15).

Images