A voltage detection protection device for power transmission and transformation engineering construction
By using a combination of elastic conductive elements and limiting mechanisms in the voltage detection device, the problems of loosening and poor contact of the connecting clamp under vibration are solved, achieving stable electrical connection and safe voltage detection.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- YUNNAN HAIZHONGJIN ELECTRIC POWER ENGINEERING CO LTD
- Filing Date
- 2026-03-17
- Publication Date
- 2026-06-12
AI Technical Summary
Existing voltage detection devices are prone to loosening of the connecting clips and have poor contact stability under construction vibration environments. They lack an effective anti-loosening mechanism, resulting in low detection reliability and high safety risks.
The design employs a combination of elastic conductive elements and a limiting mechanism. The elastic conductive elements undergo elastic deformation when clamping the electrode to conform to the electrode surface, increasing the contact area and providing a continuous elastic clamping force. The limiting mechanism prevents the movable clamping piece from retracting through mechanical locking, ensuring clamping stability.
It improves the reliability and safety of voltage detection connections, prevents the clamp from loosening under vibration, and enhances the stability of electrical contact and ease of operation.
Smart Images
Figure CN122193644A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of power detection technology, specifically a voltage detection and protection device for power transmission and transformation engineering construction. Background Technology
[0002] In the construction of power transmission and transformation projects, voltage testing is a crucial safety procedure, primarily used to confirm whether a line is energized and to measure voltage values, providing safety assurance for subsequent wiring, maintenance, and other work. Current voltage testing operations typically employ an electroscope or voltage detector in conjunction with a connecting clamp. The operator holds an insulated rod and uses the fixed clamp's clips to hook onto the electrode to be tested. Then, through manual pressing or spring action, the movable clip moves towards the fixed clip, using the clamping force between the clips to secure the connecting clamp to the electrode. Once the metal conductive plate inside the connecting clamp contacts the electrode, the voltage signal is transmitted through a connecting wire to the testing box, where the detection circuit completes the voltage measurement and display. This method, to a certain extent, meets the basic requirements of voltage testing, as the clamping force of the connecting clamp mainly comes from the operator's pressing force or the elastic force of the spring.
[0003] However, existing voltage detection devices have significant shortcomings in practical use. First, the clamping stability of the connectors is insufficient. In the construction environment of power transmission and transformation projects, there is often significant vibration and interference on site. Factors such as heavy machinery operations and cable swaying can cause the connectors to loosen. This is especially true for spring-clamped structures, where the springs are prone to vibration under vibration, causing momentary detachment between the clamp and the electrode. This results in fluctuations in contact resistance and even arcing, affecting the accuracy of the test results and posing serious safety hazards. Second, existing connectors lack effective anti-loosening mechanisms. Once clamped, the operator releases the clamp, relying solely on the spring force to maintain the clamping. When subjected to external pulling or vibration, the connector is prone to detaching from the electrode, causing test interruption. This is particularly inconvenient when working at heights or in complex terrain, severely impacting construction efficiency. Furthermore, the clamps of existing connectors are usually rigid structures with limited contact area with the electrode. When the electrode surface has slight unevenness or an oxide layer, it is difficult to form a reliable electrical connection, further increasing the risk of poor contact. These shortcomings make it difficult for existing voltage detection devices to meet the safety, stability, and reliability requirements of complex power transmission and transformation engineering construction environments. To address these issues, a voltage detection and protection device for power transmission and transformation engineering construction is provided. Summary of the Invention
[0004] The purpose of this invention is to provide a voltage detection and protection device for power transmission and transformation engineering construction, in order to solve the problems mentioned in the background art, such as the easy loosening of the connecting clip and poor contact stability of existing voltage detection devices for power transmission and transformation engineering construction under construction vibration environment, as well as the lack of an effective anti-loosening mechanism, which leads to low detection reliability and high safety risks.
[0005] To achieve the above objectives, the present invention provides the following technical solution: a voltage detection and protection device for power transmission and transformation engineering construction, comprising a detection box, wherein the detection box is connected to a connecting clamp via a line, and the connecting clamp comprises a fixed rod, a fixed clamping plate, and a movable clamping plate; The fixed clamp is fixedly connected to one end of the fixed rod, and the movable clamp is slidably installed on the side of the fixed rod and is positioned opposite to the fixed clamp; The fixed clamp and the movable clamp are provided with elastic conductive elements on their sides that are close to each other. The elastic conductive elements are used to undergo elastic deformation to fit the electrode surface when the electrode is clamped. An adjustment mechanism and a limiting mechanism are installed inside the fixed rod. The adjustment mechanism is connected to the movable clamping piece for driving the movable clamping piece to move. The limiting mechanism works with the adjustment mechanism to allow the adjustment mechanism to move in one direction when the movable clamping piece moves closer to the fixed clamping piece, and to lock the adjustment mechanism to prevent the movable clamping piece from retracting.
[0006] In a further embodiment, the elastic conductive element is a metal spring ring, which has an arc-shaped structure, and its arc-shaped recess is located in the clamping space. The fixed clip and the movable clip have a concave arc surface on their side that is close to each other. An installation groove is provided on the concave arc surface. At least two installation rods are fixedly installed in the installation groove. The metal spring ring is sleeved on the installation rod, and the arc-shaped concave part of the metal spring ring extends out of the installation groove. The arc of the concave part of the metal spring ring is greater than the arc of the concave surface of the fixed clip and the movable clip.
[0007] In a further embodiment, a connecting wire is provided on the movable clamp, one end of which is electrically connected to the metal spring ring on the movable clamp, and the other end of which passes through the movable clamp and the fixing rod and is electrically connected to the detection box.
[0008] In a further embodiment, the adjustment mechanism includes a control rack, a first gear, and a lever; The control rack is fixedly connected to one end of the movable clamp that extends into the fixed rod. The lever is slidably installed in the fixed rod, with one end of the lever extending out of the fixed rod to form a trigger structure. The lever is provided with teeth. The first gear is rotatably installed in the fixed rod and meshes between the control rack and the teeth of the lever.
[0009] In a further embodiment, the limiting mechanism includes a limiting toothed plate, a locking strip, a sleeve, a second gear, and a second spring; The limiting tooth plate is fixedly connected to the side of the lever, and the locking strip is slidably installed inside the fixed rod. One end of the locking strip is provided with locking teeth for engaging with the limiting tooth plate. The sliding direction of the locking strip is set at an angle to the sliding direction of the lever. The sleeve is slidably installed inside the fixed rod and slidably sleeved on the outer side of the end of the locking bar away from the limiting tooth plate. The second gear is rotatably installed inside the fixed rod and is connected to the locking bar and the sleeve respectively. The second spring is installed between the locking bar and the sleeve to drive the locking bar and the sleeve away from each other.
[0010] In a further embodiment, grooves are provided on both sides of the card strip, a first rack is provided on the inner wall of the groove, a second rack is provided on the inner wall of the sleeve, and a second gear is provided in the groove of the card strip and simultaneously meshes with the first rack and the second rack.
[0011] In a further embodiment, the side walls of the clip and the sleeve are provided with interconnected grooves, and the shaft of the second gear passes through the groove and is rotatably connected to the fixed rod.
[0012] In a further embodiment, the cross-sections of the teeth on the limiting tooth plate and the teeth on the clip are both right-angled triangles, and the right-angled face of the right-angled triangle is set towards the direction of the movable clip away from the fixed clip.
[0013] In a further embodiment, a first spring is also installed inside the fixed rod, one end of which is connected to the end of the lever away from the trigger structure, for driving the lever to reset.
[0014] In a further embodiment, a limit rod is fixedly connected to the end of the lever away from the trigger structure, a first spring is sleeved on the limit rod, and the limit rod is slidably inserted into the fixed rod.
[0015] Compared with the prior art, the beneficial effects of the present invention are: 1. This invention is a voltage detection and protection device for power transmission and transformation engineering construction. By setting up an elastic conductive element, the elastic conductive element undergoes elastic deformation when clamping the electrode to fit the electrode surface. This solves the problem that the existing rigid clamping plates have a small contact area with the electrode and are prone to poor contact under vibration environment. It realizes elastic adaptive fitting, increases the contact area and continuously provides elastic clamping force, and improves the connection reliability from the electrical contact level. 2. By setting a limiting mechanism and an adjusting mechanism in coordination, the limiting mechanism allows the adjusting mechanism to move in one direction when the movable clamping piece moves towards the fixed clamping piece, and locks the adjusting mechanism to prevent the movable clamping piece from retracting. This solves the problem that existing connecting clamps rely solely on spring clamping and lack mechanical locking, which makes them prone to loosening under vibration or external force. It achieves mechanical one-way locking after clamping, preventing the movable clamping piece from retracting from a structural level and significantly improving the connecting clamp's anti-loosening capability. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the overall structure of a voltage detection and protection device for power transmission and transformation engineering construction proposed in this invention; Figure 2 This is a schematic diagram of the main structure of the connecting clip of a voltage detection and protection device for power transmission and transformation engineering construction proposed in this invention; Figure 3 This is a rear view structural diagram of the connecting clip of a voltage detection and protection device for power transmission and transformation engineering construction proposed in this invention; Figure 4 This is a schematic diagram of the half-section structure of the connecting clamp of a voltage detection and protection device for power transmission and transformation engineering construction proposed in this invention; Figure 5 This is a partial cross-sectional view of the connecting clip of a voltage detection and protection device for power transmission and transformation engineering construction proposed in this invention. Figure 6 This is a schematic diagram of the internal structure of the fixing rod of a voltage detection and protection device for power transmission and transformation engineering construction proposed in this invention; Figure 7 This is a schematic diagram of the movable clamp structure of a voltage detection and protection device for power transmission and transformation engineering construction proposed in this invention; Figure 8 This is a schematic cross-sectional view of the movable clamp structure of a voltage detection and protection device for power transmission and transformation engineering construction proposed in this invention; Figure 9 This is a schematic diagram of the connection structure between the limit mechanism and the lever of a voltage detection and protection device for power transmission and transformation engineering construction proposed in this invention; Figure 10 This invention proposes a voltage detection and protection device for power transmission and transformation engineering construction. Figure 9 Enlarged view of point A in the middle; Figure 11 This is a schematic diagram of the limiting mechanism structure of a voltage detection and protection device for power transmission and transformation engineering construction proposed in this invention; Figure 12 This is a cross-sectional view of the limit mechanism of a voltage detection and protection device for power transmission and transformation engineering construction proposed in this invention.
[0017] In the diagram: 1. Detection box; 2. Connecting clamp; 3. Fixing rod; 31. Fixing clamp; 32. Movable clamp; 33. Metal spring ring; 331. Connecting wire; 4. Adjustment mechanism; 41. Control rack; 42. First gear; 43. Lever; 431. First spring; 432. Limiting rod; 433. Limiting toothed plate; 5. Limiting mechanism; 51. Locking strip; 511. First rack; 52. Sleeve; 521. Second rack; 53. Second gear; 54. Second spring. Detailed Implementation
[0018] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0019] Please see Figure 1 - Figure 12 This embodiment provides a voltage detection and protection device for power transmission and transformation engineering construction, including a detection box 1. For example... Figure 1 As shown, the testing box 1 is a conventional device used in the prior art for voltage testing during power transmission and transformation engineering construction. It integrates a voltage detection circuit and a display module for measuring and displaying the voltage of the electrodes. The testing box 1 is connected to a connecting clip 2, which is used to clamp and connect with the electrode to be tested, transmitting the electrode's voltage signal to the testing box 1 for detection.
[0020] like Figure 2 As shown, the connecting clamp 2 includes a fixed rod 3, a fixed clamping piece 31, and a movable clamping piece 32. The fixed rod 3, serving as the main support structure of the connecting clamp 2, is a long rod made of insulating material for easy hand-held operation. The fixed clamping piece 31 is fixedly connected to one end of the fixed rod 3, and the fixed clamping piece 31 and the fixed rod 3 are manufactured using an integral molding method to ensure that the fixed clamping piece 31 remains stable during clamping. The movable clamping piece 32 is slidably mounted on the side of the fixed rod 3 and is positioned opposite to the fixed clamping piece 31. Specifically, a groove extending along the length of the fixed rod 3 is provided on the side of the fixed rod 3, and a slider is provided at one end of the movable clamping piece 32. The slider is slidably embedded in the groove, thereby enabling the movable clamping piece 32 to be slidably mounted on the side of the fixed rod 3. This sliding mounting method allows the movable clamping piece 32 to move closer to or further away from the fixed clamping piece 31, thereby achieving the clamping or release of the electrode. The fixed clamp 31 serves as the reference side for clamping. During operation, the electrode can be hooked by the angle formed by the fixed clamp 31 and the fixed rod 3 to achieve initial positioning. Then, the clamping is completed by moving the movable clamp 32. This operation method is ergonomic and facilitates one-handed operation.
[0021] like Figure 2As shown, elastic conductive elements are provided on the sides of the fixed clamp 31 and the movable clamp 32 that are close to each other. These elastic conductive elements undergo elastic deformation to conform to the electrode surface when clamping the electrode. The use of elastic conductive elements solves the problems of small contact area and unreliable contact between traditional rigid clamps and electrodes. When the movable clamp 32 moves towards the fixed clamp 31 to clamp the electrode, the elastic conductive element first contacts the electrode and undergoes elastic deformation under the clamping force. The deformed elastic conductive element can adaptively conform to the surface shape of the electrode. Even if there are slight unevennesses or minor differences in diameter on the electrode surface, the elastic conductive element can fill the gaps through deformation, thereby significantly increasing the contact area with the electrode. Simultaneously, the elastic recovery force generated by the elastic deformation ensures that the elastic conductive element always applies a certain clamping force to the electrode. This continuous elastic pressure effectively prevents the connecting clamp 2 from loosening due to construction vibrations, cable swaying, or other factors, thus protecting the detection circuit at the electrical contact point level.
[0022] Specifically, the elastic conductive element is a metal spring ring 33. The metal spring ring 33 is made of a metal material with good conductivity and elasticity, such as phosphor bronze or beryllium bronze. The metal spring ring 33 has an arc-shaped structure, with its arc-shaped recess located within the clamping space. The arc-shaped structure refers to the fact that the metal spring ring 33 is generally curved, resembling the shape of a bow and arrow, with its central part concave to one side to form a recess, and the two sides serving as supporting ends. This structure allows the metal spring ring 33 to elastically deform under radial compression and to recover its original shape after deformation. Figure 2 As shown, the surfaces of the fixed clamp 31 and the movable clamp 32 that are close to each other are concave arc surfaces. The curvature of the concave arc surface matches the cylindrical surface of the electrode, allowing the clamps to better fit the electrode during clamping. A mounting groove is formed on the concave arc surface to accommodate and mount the metal spring ring 33. At least two mounting rods are fixedly installed in the mounting groove. The mounting rods are cylindrical rods with both ends fixedly connected to the sidewalls of the mounting groove. The metal spring ring 33 is fitted onto the mounting rods. Specifically, both ends of the metal spring ring 33 are fitted onto the mounting rods, allowing the metal spring ring 33 a certain degree of rotational freedom around the mounting rods, while also providing support for the metal spring ring 33. The arc-shaped recess of the metal spring ring 33 extends out of the mounting groove; that is, the middle recessed part of the metal spring ring 33 protrudes beyond the concave arc surface of the clamp, so that in the unclamped state, the lowest point of the recess of the metal spring ring 33 is lower than the edge of the arc surface of the clamp. This protruding arrangement ensures that the metal spring ring 33 preferentially contacts the electrode during clamping.
[0023] like Figure 2As shown, the arc of the concave portion of the metal spring ring 33 is greater than the arc of the concave surface of the fixed clamp 31 and the movable clamp 32. In other words, the metal spring ring 33 is more "fuller" in its convexity towards the electrode than the clamp's arc surface. This arc difference design has significant technical implications: when the movable clamp 32 moves towards the fixed clamp 31 to clamp the electrode, the arc of the metal spring ring 33, due to its greater arc, causes its concave portion to contact the electrode surface first. As the clamping force increases, the electrode compresses the metal spring ring 33, causing its arc structure to expand and undergo elastic deformation. Because the arc of the metal spring ring 33 is greater than that of the clamp, significant elastic deformation occurs before the concave surface of the clamp contacts the electrode. When the concave surface of the clamp finally contacts the electrode, the metal spring ring 33 is still in a compressed state; that is, the metal spring ring 33 maintains elastic pressure on the electrode at all times. This "constantly pressurized" state ensures that the contact pressure between the metal spring ring 33 and the electrode is constant and sufficient, preventing loosening of the contact due to slight changes in the electrode diameter. Simultaneously, the elastic deformation of the metal spring ring 33 allows it to adaptively conform to the electrode surface. Even if the electrode surface has slight unevenness, the metal spring ring 33 can fill the gaps through localized deformation, achieving a tight fit at the microscopic level, thereby maximizing the contact area and reducing contact resistance.
[0024] like Figure 1 and Figure 8 As shown, a connecting wire 331 is provided on the movable clamp 32. The connecting wire 331 is a flexible conductive cable used to transmit the detected voltage signal to the detection box 1. One end of the connecting wire 331 is connected to the metal spring ring 33 on the movable clamp 32. The specific connection method can be welding, crimping, or screw tightening. The other end of the connecting wire 331 passes through the movable clamp 32 and the fixing rod 3 and is electrically connected to the detection box 1. In order to facilitate the passage of the connecting wire 331, a wire-passing hole is opened inside the movable clamp 32, and a through wire hole is opened inside the fixing rod 3. The connecting wire 331 enters from the wire-passing hole of the movable clamp 32, passes through the wire groove inside the fixing rod 3, and finally leads out from the other end of the fixing rod 3 to connect with the detection box 1.
[0025] An adjusting mechanism 4 and a limiting mechanism 5 are installed inside the fixed rod 3. The adjusting mechanism 4 is connected to the movable clamping piece 32 for driving its movement. The limiting mechanism 5 cooperates with the adjusting mechanism 4 to allow the adjusting mechanism 4 to move in one direction when the movable clamping piece 32 moves closer to the fixed clamping piece 31, and to lock the adjusting mechanism 4 to prevent the movable clamping piece 32 from retracting. The setting of the adjusting mechanism 4 and the limiting mechanism 5 allows the operator to complete the clamping operation with one hand, and the clamping state can be maintained without continuous force after clamping, greatly reducing the operator's labor intensity and ensuring the stability of clamping. The locking function of the limiting mechanism 5 prevents the movable clamping piece 32 from retracting due to vibration or accidental contact, further enhancing the anti-loosening capability of the connecting clamp 2 from a mechanical locking perspective, forming a double protection with the elastic clamping of the metal spring ring 33.
[0026] like Figure 6 As shown, the adjusting mechanism 4 includes a control rack 41, a first gear 42, and a lever 43. The control rack 41 is fixedly connected to one end of the movable clamp 32 that extends into the fixed rod 3. The control rack 41 is a long strip-shaped component with continuous teeth on one side for meshing with the first gear 42. The lever 43 is slidably installed inside the fixed rod 3, and the lever 43 has an overall T-shaped structure. The upper end of the T-shape of the lever 43 has teeth, which are a continuous section for meshing with the first gear 42. Below the T-shape of the lever 43 is a trigger-like structure, located on the side of the fixed rod 3 away from the fixed clamp 31, i.e., the side of the fixed rod 3 facing away from the fixed clamp 31, making it easy for the operator to pull with their fingers. This T-shaped structure design separates the teeth of the lever 43 from the trigger part, resulting in a compact structure and reasonable force distribution.
[0027] like Figure 6 As shown, multiple first gears 42 are provided, and all of them are rotatably mounted within the fixed rod 3. The center of each first gear 42 is rotatably connected to the side wall of the fixed rod 3 via a rotating shaft, and the two ends of the rotating shaft are rotatably supported in the shaft holes on the two side walls of the fixed rod 3. The multiple first gears 42 mesh sequentially to form a gear transmission chain, which meshes between the teeth of the control rack 41 and the lever 43. Specifically, the first gear 42 at the beginning of the gear transmission chain meshes with the teeth of the lever 43, the first gear 42 at the end of the gear transmission chain meshes with the control rack 41, and the first gear 42 in the middle acts as an idler gear to transmit motion and power.
[0028] This transmission structure, composed of multiple first gears 42, cleverly utilizes the direction conversion and stroke amplification characteristics of gear transmission. The operator pulls the trigger mechanism of the lever 43 with their finger, causing the lever 43 to slide away from the fixed clamp 31, i.e., towards the rear of the fixed rod 3. As the lever 43 slides, the teeth at the upper T-shaped end of the lever 43 drive the meshing first gear 42 to rotate. The rotation of the first gear 42 is transmitted through the middle first gear 42 to the end first gear 42. The rotation of the end first gear 42 causes the control rack 41 to move closer to the fixed clamp 31, i.e., towards the front of the fixed rod 3. The forward movement of the control rack 41 drives the movable clamp 32 to move closer to the fixed clamp 31, thereby clamping the electrode.
[0029] This "pull-back, clamp-forward" operation method, achieved through multiple first gears 42, has significant technical implications: the operator can first hook the electrode using the angle formed by the fixed clamping plate 31 and the fixed rod 3, and then complete the clamping by pulling the trigger located behind the fixed rod 3. The action is smooth and natural, conforming to the mechanical principles of single-handed operation. When the operator pulls the trigger, their hand pulls towards their body; this centripetal pull is more stable and less strenuous than a forward push, better maintaining the initial positioning of the fixed clamping plate 31 hooking the electrode. The multiple first gears 42 also allow for adjustment of the transmission ratio according to actual needs. By selecting gear combinations with different numbers of teeth, the travel distance and clamping force of the movable clamping plate 32 can be adjusted, making the operation more precise and controllable. Simultaneously, the meshing transmission of multiple gears allows the minute sliding of the lever 43 to be converted into precise movement of the rack 41, improving the sensitivity and accuracy of the clamping operation.
[0030] like Figure 12 As shown, the limiting mechanism 5 includes a limiting toothed plate 433, a locking strip 51, a sleeve 52, a second gear 53, and a second spring 54. The limiting toothed plate 433 is fixedly connected to the side of the lever 43. The limiting toothed plate 433 is a long strip-shaped plate with continuous locking teeth on its upper surface. The locking strip 51 is slidably installed inside the fixed rod 3. One end of the locking strip 51 is provided with locking teeth for engaging with the limiting toothed plate 433, and the locking teeth of the locking strip 51 are oriented towards the limiting toothed plate 433. The sliding direction of the locking strip 51 is set at an angle to the sliding direction of the lever 43. In this embodiment, the sliding direction of the locking strip 51 is perpendicular to the sliding direction of the lever 43, that is, the locking strip 51 slides up and down inside the fixed rod 3, and the lever 43 slides back and forth inside the fixed rod 3. This vertical arrangement makes full use of the internal space of the fixed rod 3, resulting in a compact structure.
[0031] The sleeve 52 is slidably installed inside the fixed rod 3 and slidably sleeved on the outer side of the end of the retaining strip 51 away from the limiting tooth plate 433. The sleeve 52 has a cylindrical structure and is hollow inside, with the upper end of the retaining strip 51 inserted into the interior of the sleeve 52. The second gear 53 is rotatably installed inside the fixed rod 3 and is connected to both the retaining strip 51 and the sleeve 52 in a transmission manner. The second spring 54 is installed between the retaining strip 51 and the sleeve 52 to drive the retaining strip 51 and the sleeve 52 away from each other. Specifically, the second spring 54 is a compression spring, located between the top of the retaining strip 51 and the inner top surface of the sleeve 52. The spring force always pushes the retaining strip 51 downward and the sleeve 52 upward.
[0032] like Figure 12 As shown, the retaining strip 51 has grooves on both sides, which are rectangular recesses extending along the length of the retaining strip 51. A first rack 511 is provided on the inner wall of the groove, with its teeth facing inwards. A second rack 521 is provided on the inner wall of the sleeve 52, with its teeth facing inwards towards the center of the sleeve 52. A second gear 53 is disposed within the groove of the retaining strip 51 and meshes with both the first rack 511 and the second rack 521. In other words, the second gear 53 is located within the groove of the retaining strip 51, and its teeth mesh with both the first rack 511 on the inner wall of the groove and the second rack 521 on the inner wall of the sleeve 52. When the sleeve 52 moves up and down relative to the retaining strip 51, the retaining strip 51 moves in the opposite direction due to the meshing of the second gear 53 with the first rack 511 and the second rack 521. Specifically, when the sleeve 52 is pressed down, the sleeve 52 moves down, and the second rack 521 inside the sleeve 52 drives the second gear 53 to rotate. The rotation of the second gear 53 drives the retaining strip 51 to move upward through the first rack 511. When the sleeve 52 is released, the second spring 54 pushes the sleeve 52 to move upward and the retaining strip 51 to move downward, and the second gear 53 rotates in the opposite direction.
[0033] Both the retaining bar 51 and the sleeve 52 have interconnected sliding grooves on their side walls. The sliding grooves are elongated through holes extending along the length of the retaining bar 51 and the sleeve 52. The sliding grooves on the retaining bar 51 and the sleeve 52 correspond in position and are interconnected to form a continuous guide channel. The shaft of the second gear 53 passes through the sliding groove and is rotatably connected to the fixed rod 3. The sliding grooves allow the shaft of the second gear 53 to move relative to each other within the grooves as the retaining bar 51 and the sleeve 52 slide, ensuring stable meshing between the second gear 53 and the first rack 511 and the second rack 521, while also guiding and limiting the sliding of the retaining bar 51 and the sleeve 52.
[0034] The teeth on the limiting tooth plate 433 and the teeth on the locking strip 51 both have right-angled triangle cross sections, with the right-angled faces of the triangles facing away from the fixed clamping plate 31. This tooth design achieves a one-way locking function: when the lever 43 moves away from the fixed clamping plate 31 (i.e., the clamping direction), the limiting tooth plate 433 moves with the lever 43, and the inclined surfaces of the teeth on the limiting tooth plate 433 contact the inclined surfaces of the teeth on the locking strip 51. The relative sliding of the inclined surfaces generates an upward component force, pushing the locking strip 51 upward, causing the teeth of the locking strip 51 to pass over the teeth of the limiting tooth plate 433. Then, the locking strip 51 falls under the action of the second spring 54 and locks into the next tooth groove. This process is repeated to achieve a "stepping" effect, allowing the lever 43 to move in one direction. When the lever 43 is subjected to a reverse force and attempts to retract, the vertical surface of the locking teeth on the limiting tooth plate 433 abuts against the vertical surface of the locking teeth on the locking strip 51. Since there is no sliding force between the vertical surfaces, the locking strip 51 cannot be lifted, thereby preventing the lever 43 from retracting and achieving a "locking" effect. This tooth design is simple and reliable, and can achieve unidirectional stepping and locking functions without additional control mechanisms.
[0035] like Figure 6 and Figure 9 As shown, a first spring 431 is also installed inside the fixed rod 3. The first spring 431 is a compression spring, one end of which is connected to the end of the lever 43 away from the trigger structure, and is used to drive the lever 43 to reset. Specifically, one end of the first spring 431 abuts against the end of the lever 43, and the other end abuts against the inner wall of the fixed rod 3. When the operator pulls the lever 43 to complete the clamping, the first spring 431 is compressed and stores energy. When it is necessary to release the electrode, the limiting mechanism 5 is operated first to release the lock, and the elastic force of the first spring 431 can push the lever 43 to reset, causing the movable clamping piece 32 to move away from the fixed clamping piece 31, thus releasing the electrode. The setting of the first spring 431 enables the lever 43 to automatically reset without manual push, making the operation more convenient and efficient.
[0036] One end of the lever 43 is fixedly connected to a limiting rod 432. The limiting rod 432 is a slender cylindrical rod, coaxially arranged with the lever 43. A first spring 431 is sleeved on the limiting rod 432, and the limiting rod 432 is slidably inserted into the fixed rod 3. Specifically, the fixed rod 3 has a guide hole inside, and the limiting rod 432 is inserted into the guide hole and can slide along the guide hole. The limiting rod 432 guides and limits the first spring 431, preventing the first spring 431 from bending and deforming during compression and extension, ensuring that the spring force direction is consistent with the sliding direction of the lever 43, and ensuring the smoothness and reliability of the lever 43's reset.
[0037] The working principle of this embodiment is as follows: The operator holds the fixed rod 3 and uses the angle formed by the fixed clamp 31 and the fixed rod 3 to hook the electrode to be tested. Then, the operator pulls the trigger mechanism of the lever 43, causing the lever 43 to slide away from the fixed clamp 31. The sliding of the lever 43, through the transmission of the first gear 42, drives the control rack 41 to move closer to the fixed clamp 31, thereby causing the movable clamp 32 to move closer to the fixed clamp 31. During the process of the movable clamp 32 moving towards the fixed clamp 31, the metal spring rings 33 on the fixed clamp 31 and the movable clamp 32 first contact the electrode. Since the arc of the concave part of the metal spring ring 33 is greater than the arc of the inner concave surface of the clamp, the metal spring ring 33 preferentially contacts the electrode and undergoes elastic deformation. As the clamping force increases, the metal spring ring 33 is further compressed, its arc structure is stretched open, and an inward elastic restoring force is generated, causing the metal spring ring 33 to tightly hug the electrode surface. At the same time, the inner concave surface of the clamp also gradually adheres to the electrode, forming auxiliary support for the electrode.
[0038] During the operation of lever 43, the limiting mechanism 5 works synchronously. As lever 43 moves, the limiting tooth plate 433 moves accordingly. The inclined surface of the retaining teeth on the limiting tooth plate 433 interacts with the inclined surface of the retaining teeth on the retaining strip 51, pushing the retaining strip 51 upwards. Then, under the action of the second spring 54, the retaining strip 51 falls and engages in the next tooth groove. This process repeats, allowing lever 43 to move in one direction. When lever 43 moves to the position where the movable clamping piece 32 clamps the electrode, the operation stops. The retaining strip 51 engages in the current tooth groove of the limiting tooth plate 433. Because the vertical surfaces of the retaining teeth abut against each other, lever 43 is prevented from retracting, thus locking the movable clamping piece 32 in the clamping position. At this time, the metal spring ring 33 is in a state of continuous elastic compression, applying a stable clamping force to the electrode. This, together with the mechanical locking of the limiting mechanism 5, ensures a stable connection between the connecting clamp 2 and the electrode, preventing loosening due to construction vibration, cable swaying, or other factors.
[0039] After the test is completed, when it is necessary to release the connecting clip 2, the operator presses down on the end of the sleeve 52 that protrudes from the side of the fixing rod 3. The sleeve 52 moves down, and the second rack 521 inside the sleeve 52 drives the second gear 53 to rotate. The rotation of the second gear 53 drives the locking strip 51 to move upward through the first rack 511, causing the locking teeth of the locking strip 51 to disengage from the limiting tooth plate 433. At this time, the elastic force of the first spring 431 pushes the lever 43 to reset. The lever 43 drives the control rack 41 to move away from the fixed clamp 31 through the first gear 42, thereby driving the movable clamp 32 away from the fixed clamp 31 and releasing the electrode. After the sleeve 52 is released, the second spring 54 pushes the sleeve 52 to move upward and the locking strip 51 to move downward, so that the locking teeth of the locking strip 51 re-engage with the limiting tooth plate 433, ready for the next use.
[0040] In this embodiment, the fixed rod 3 is further provided with several mounting holes, positioning grooves, and other structures for mounting the rotating shafts, springs, guide rods, and other components of the aforementioned mechanisms. The outer wall of the fixed rod 3 has through holes for the lever 43 to pass through and through holes for the sleeve 52 to pass through. A guide protrusion and a guide groove are provided between the slider of the movable clamp 32 and the sliding groove of the fixed rod 3 to ensure the smooth sliding of the movable clamp 32. A guide block is provided on the back of the control rack 41, which slides in cooperation with the guide groove in the fixed rod 3 to prevent the control rack 41 from deflecting during movement. The two ends of the rotating shafts of the first gear 42 and the second gear 53 are rotatably connected to the shaft holes on both sides of the fixed rod 3, and wear-resistant bushings can be installed in the shaft holes to reduce friction. A limiting step is provided in the mounting cavity of the first spring 431, which cooperates with the end of the limiting rod 432 to limit the maximum compression of the first spring 431. The second spring 54 is installed between the spring seat inside the sleeve 52 and the spring seat at the top of the retaining bar 51. The two spring seats position and guide the second spring 54.
[0041] Compared to existing voltage detection and protection devices, this invention employs a dual protection design of an elastic conductive element and a limiting mechanism 5. This solves the safety hazards of existing devices relying solely on spring clamping, which are prone to loosening under construction vibration environments, leading to poor contact or even arcing. Specifically, the elastic conductive element, through its arc-shaped structure and curvature difference setting, remains in an elastic compression state during clamping, applying a continuous elastic clamping force to the electrodes, achieving adaptive fit and anti-loosening at the electrical contact level. The limiting mechanism 5, through the one-way locking function of the locking teeth, mechanically locks the adjusting mechanism 4 after clamping, preventing the movable clamping piece 32 from retracting due to vibration, thus preventing loosening at the mechanical structure level. The synergistic effect of these two mechanisms forms a complete protection system, significantly improving the safety and reliability of voltage detection operations. Furthermore, the operation of this invention is ergonomic, allowing for the entire process of clamping, locking, and releasing to be completed with one hand, making it convenient, efficient, and suitable for various complex power transmission and transformation engineering construction environments.
[0042] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A voltage detection and protection device for power transmission and transformation engineering construction, comprising a detection box (1), characterized in that: The detection box (1) is connected to a connecting clip (2), which includes a fixed rod (3), a fixed clip (31), and a movable clip (32). The fixed clamp (31) is fixedly connected to one end of the fixed rod (3), and the movable clamp (32) is slidably installed on the side of the fixed rod (3) and is arranged opposite to the fixed clamp (31); The fixed clamp (31) and the movable clamp (32) are provided with an elastic conductive element on the side that is close to each other. The elastic conductive element is used to undergo elastic deformation to fit the electrode surface when the electrode is clamped. The fixed rod (3) is equipped with an adjustment mechanism (4) and a limiting mechanism (5). The adjustment mechanism (4) is connected to the movable clamp (32) for driving the movable clamp (32) to move. The limiting mechanism (5) cooperates with the adjustment mechanism (4) to allow the adjustment mechanism (4) to move in one direction when the movable clamp (32) moves closer to the fixed clamp (31), and to lock the adjustment mechanism (4) to prevent the movable clamp (32) from retracting.
2. The voltage detection and protection device for power transmission and transformation engineering construction according to claim 1, characterized in that: The elastic conductive element is a metal spring ring (33), which has an arc-shaped structure and its arc-shaped concave part is located in the clamping space; The fixed clip (31) and the movable clip (32) are close to each other on a concave arc surface. An installation groove is provided on the concave arc surface. At least two installation rods are fixedly installed in the installation groove. The metal spring ring (33) is sleeved on the installation rod, and the arc-shaped concave part of the metal spring ring (33) extends out of the installation groove. The arc of the concave portion of the metal spring ring (33) is greater than the arc of the concave surface of the fixed clip (31) and the movable clip (32).
3. A voltage detection and protection device for power transmission and transformation engineering construction according to claim 2, characterized in that: A connecting line (331) is provided on the movable clamp (32). One end of the connecting line (331) is electrically connected to the metal spring ring (33) on the movable clamp (32), and the other end of the connecting line (331) passes through the movable clamp (32) and the fixing rod (3) and is electrically connected to the detection box (1).
4. A voltage detection and protection device for power transmission and transformation engineering construction according to claim 3, characterized in that: The adjustment mechanism (4) includes a control rack (41), a first gear (42), and a lever (43). The control rack (41) is fixedly connected to one end of the movable clamp (32) that extends into the fixed rod (3). The lever (43) is slidably installed in the fixed rod (3). One end of the lever (43) extends out of the fixed rod (3) to form a trigger structure. The lever (43) is provided with teeth. The first gear (42) is rotatably installed in the fixed rod (3) and meshes between the control rack (41) and the teeth of the lever (43).
5. A voltage detection and protection device for power transmission and transformation engineering construction according to claim 4, characterized in that: The limiting mechanism (5) includes a limiting toothed plate (433), a locking strip (51), a sleeve (52), a second gear (53), and a second spring (54); The limiting tooth plate (433) is fixedly connected to the side of the lever (43), and the locking strip (51) is slidably installed in the fixed rod (3). One end of the locking strip (51) is provided with locking teeth for engaging with the limiting tooth plate (433). The sliding direction of the locking strip (51) is set at an angle to the sliding direction of the lever (43). The sleeve (52) is slidably installed inside the fixed rod (3) and slidably sleeved on the outer side of the end of the clip (51) away from the limiting tooth plate (433). The second gear (53) is rotatably installed inside the fixed rod (3) and is connected to the clip (51) and the sleeve (52) respectively. The second spring (54) is installed between the clip (51) and the sleeve (52) to drive the clip (51) and the sleeve (52) to move away from each other.
6. A voltage detection and protection device for power transmission and transformation engineering construction according to claim 5, characterized in that: The card strip (51) has grooves on both sides, and the inner wall of the groove is provided with a first rack (511). The inner wall of the sleeve (52) is provided with a second rack (521). The second gear (53) is located in the groove of the card strip (51) and simultaneously meshes with the first rack (511) and the second rack (521).
7. A voltage detection and protection device for power transmission and transformation engineering construction according to claim 6, characterized in that: The side walls of the card strip (51) and the sleeve (52) are provided with interconnected sliding grooves, and the shaft of the second gear (53) passes through the sliding groove and is rotatably connected to the fixed rod (3).
8. A voltage detection and protection device for power transmission and transformation engineering construction according to claim 7, characterized in that: The cross-sections of the teeth on the limiting tooth plate (433) and the teeth on the clip (51) are both right-angled triangles, and the right-angled face of the right-angled triangle is set in the direction of the movable clip (32) away from the fixed clip (31).
9. A voltage detection and protection device for power transmission and transformation engineering construction according to claim 8, characterized in that: The fixing rod (3) is also equipped with a first spring (431), one end of which is connected to the end of the lever (43) away from the trigger structure, for driving the lever (43) to reset.
10. A voltage detection and protection device for power transmission and transformation engineering construction according to claim 9, characterized in that: The lever (43) is fixedly connected to a limiting rod (432) at the end away from the trigger structure. The first spring (431) is sleeved on the limiting rod (432), and the limiting rod (432) is slidably inserted into the fixed rod (3).