Snap-on closure removal device and metering apparatus

Abstract

The application provides a buckle type sealing removal device and a metering equipment, and relates to the technical field of metering equipment.The buckle type sealing removal device comprises an operation part, a puncture head connected to the operation part, and a clamping jaw connected to the operation part, wherein the clamping jaw surrounds the periphery of the puncture head, the clamping jaw comprises at least two puncture pieces, the diameter of the clamping jaw matches the diameter of a connecting hole, and a positioning assembly comprises a suction disc and a positioning ring connected together, wherein the inner ring diameter of the positioning ring matches the diameter of the clamping jaw, the suction disc is configured to be adsorbed to the surface of the metering equipment when the buckle type sealing is removed, the positioning ring surrounds the opening of the connecting hole, the clamping jaw is configured to enter the connecting hole after passing through the positioning ring, the puncture pieces are configured to pierce the buckle type sealing and the clamping part of the metering equipment, and the puncture head is configured to pierce the buckle type sealing, so that the buckle type sealing is removed.The buckle type sealing removal device and the metering equipment are convenient to disassemble and are not easy to damage the equipment.

Description

Technical Field

[0001] This application relates to the field of measuring equipment technology, and in particular to a snap-on seal removal device and measuring equipment. Background Technology

[0002] Metering equipment, as specialized instruments used to measure users' energy consumption, commonly includes electricity meters, gas meters, and water meters. The threaded connections of the casing of these devices are typically equipped with lead seals. The core function of these lead seals is to lock the threaded connections and prevent unauthorized disassembly and tampering with the metering data. Current techniques for removing these lead seals mostly involve using screwdrivers, pry bars, or other hard tools to directly pry and cut the seal body to release it. This method has significant drawbacks. Firstly, the seal is tightly fitted to the threaded connections, leaving little space for the tools to apply force and no point of leverage, making overall disassembly difficult. Secondly, the direct contact and pressure of hard tools with the threaded connections around the seal and the casing of the metering equipment can easily scratch and damage the threads, causing stripping and failure. It can also easily scratch the casing and damage internal metering components. Summary of the Invention

[0003] To address at least one of the problems mentioned in the background art, this application provides a snap-on seal removal device and a measuring device that are easy to disassemble and do not easily damage the equipment.

[0004] To achieve the above objectives, this application provides the following technical solution:

[0005] This application provides a snap-on seal removal device for removing snap-on seals from threaded connectors on metering equipment. The threaded connector is installed at a connection hole on the metering equipment. The snap-on seal removal device includes:

[0006] Operations Department;

[0007] The puncture head is connected to the operating part;

[0008] The gripper is connected to the operating part and surrounds the puncture head. The gripper includes at least two puncture blades, and the diameter of the gripper matches the diameter of the connecting hole.

[0009] The positioning assembly includes a suction cup and a positioning ring connected together. The inner diameter of the positioning ring matches the diameter of the gripper. When removing the snap-on seal, the suction cup is configured to adhere to the surface of the metering device, the positioning ring surrounds the opening of the connection hole, and the gripper is configured to pass through the positioning ring and enter the connection hole to puncture the snap-on seal and the snap-on part of the metering device with a piercing piece and puncture the snap-on seal with a piercing head, thereby removing the snap-on seal.

[0010] As an optional implementation, a limiting ring is also included. The limiting ring is disposed around the operating part, and the diameter of the limiting ring is larger than the diameter of the gripper. The limiting ring is used to abut against the end face of the positioning ring when the gripper passes through the connecting hole.

[0011] As an optional implementation, an insulating sleeve is also included, which is at least fitted onto the operating part.

[0012] As an optional implementation, an insulating cover is also included, which is used to cover the outside of the gripper.

[0013] As an alternative implementation, the operating part includes a handle and a connecting rod, with a first end of the connecting rod connected to the handle and a puncture head connected to a second end of the connecting rod.

[0014] As an alternative implementation, the extension direction of the linkage is different from that of the grip.

[0015] As an optional implementation, the puncture head has external threads on its outer side.

[0016] As an alternative implementation, the positioning ring is made of an elastic material.

[0017] As an alternative implementation, the positioning component also includes a handle that is attached to the suction cup.

[0018] Secondly, this application also provides a measuring device, including the snap-on seal removal device of the first aspect.

[0019] The snap-on seal removal device provided in this application allows the suction cup to be first attached to the surface of the measuring equipment during removal operations, providing a stable support point for subsequent force application. This solves the problems of traditional tools slipping easily due to lack of fixed support and limited space for force application. At the same time, the positioning ring stably surrounds the opening of the connection hole, providing a guide channel for the gripper. Since the inner diameter of the positioning ring matches the diameter of the gripper, when the gripper passes through the positioning ring, the inner wall of the positioning ring restricts the radial movement of the gripper, ensuring that the gripper can only extend into the connection hole along the axial direction of the inner ring of the positioning ring. This ensures that the piercing piece of the gripper is accurately aligned and inserted into the gap between the snap-on seal and the inner wall of the connection hole, preventing the gripper from shifting due to hand shaking. In addition, the positioning ring surrounding the opening of the connection hole can also isolate the gripper, piercing head, threaded connector, and equipment housing, forming a physical protective barrier.

[0020] Subsequently, the handheld operating unit pushes the gripper along the positioning ring guide into the connection hole. The piercing blade continues to move downward along the gap between the seal and the inner wall of the connection hole, piercing the locking part between the seal and the inner wall of the connection hole. At the same time, the piercing head penetrates the snap-on seal body forward and then pulls the removal device outward towards the connection hole. The piercing head uses the locking force after penetrating the seal to move the seal outward. The piercing blade of the gripper clamps around the seal and works with the piercing head to remove the snap-on seal as a whole from the connection hole. Throughout the process, the gripper and piercing head only act on the snap-on seal itself and will not directly contact, squeeze, or bump the threaded connector and the outer shell of the metering equipment. This avoids thread stripping failure, scratching and damage to the equipment shell, and prevents external force from accidentally damaging the internal metering components of the equipment. At the same time, it simplifies the removal process of the snap-on seal and improves the convenience and standardization of the removal operation. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 A schematic diagram of the snap-on seal removal device provided in the embodiments of this application;

[0023] Figure 2 This is a first schematic diagram of the snap-on seal removal device provided in this application embodiment after the positioning component has been removed;

[0024] Figure 3 A second schematic diagram of the snap-on seal removal device provided in this application embodiment after removing the positioning component;

[0025] Figure 4 A schematic diagram of the positioning component in the snap-on seal removal device provided in the embodiments of this application;

[0026] Figure 5 This is a schematic diagram of the snap-on seal removal device provided in this application embodiment before removing the snap-on seal;

[0027] Figure 6 A schematic diagram illustrating the removal of a snap-on seal using the snap-on seal removal device provided in this application embodiment;

[0028] Figure 7 for Figure 6 Enlarged view of point A in the middle.

[0029] Explanation of reference numerals in the attached figures:

[0030] 100. Snap-on seal removal device; 110. Operating unit; 111. Handle; 112. Connecting rod; 120. Puncture head; 130. Gripper; 140. Positioning assembly; 141. Suction cup; 142. Positioning ring; 143. Connector; 144. Handle; 150. Limiting ring; 160. Insulating sleeve; 170. Insulating cover; 200. Snap-on seal; 210. Sealing plate; 220. Sleeve; 230. Snap-on; 300. Measuring equipment; 310. Threaded connector; 320. Connecting hole; 330. Slot. Detailed Implementation

[0031] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0032] In this application, the terms “upper,” “lower,” “left,” “right,” “front,” “back,” “top,” “bottom,” “inner,” “outer,” “vertical,” “horizontal,” “lateral,” and “longitudinal” indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated devices, elements, or components to having a specific orientation, or to be constructed and operated in a specific orientation.

[0033] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0034] Furthermore, the terms "installation," "setup," "equipped with," "connection," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0035] Furthermore, the terms "first," "second," etc., are primarily used to distinguish different devices, elements, or components (which may be the same or different in specific type and construction), and are not intended to indicate or imply the relative importance or quantity of the indicated devices, elements, or components. Unless otherwise stated, "a plurality of" means two or more.

[0036] Existing technologies for removing lead seals from such metering equipment mostly involve using hard tools such as screwdrivers and pry bars to directly pry and cut the seal body to release the lock. This removal operation has obvious drawbacks. On the one hand, the lead seal is tightly fitted to the threaded connector, leaving little space for the tool to apply force and no point of leverage, making the overall disassembly operation difficult. On the other hand, the hard tools directly contact and squeeze the threaded connectors around the lead seal and the outer shell of the metering equipment, which can easily scratch and bump the threads, causing them to strip and fail. At the same time, they can easily scratch the equipment shell and damage the internal metering components.

[0037] In view of this, this application provides a snap-on seal removal device. During the removal operation, the suction cup can first be adsorbed onto the surface of the measuring equipment to provide a stable support point for subsequent force application. The positioning ring is stably wrapped around the opening of the connecting hole, providing a guide channel for the gripper and restricting the radial movement of the gripper. Then, the hand-held operating part pushes the gripper along the positioning ring guide to extend into the connecting hole. The piercing blade continues to move downward along the gap between the seal and the inner wall of the connecting hole, piercing the snap-on part between the seal and the inner wall of the connecting hole. At the same time, the piercing head penetrates forward through the snap-on seal body and then towards... The external lifting and removal device of the connection hole uses the piercing head to move the seal outward by relying on the clamping force after penetrating the seal. The piercing plate of the gripper clamps the outer perimeter of the seal and works together with the piercing head to remove the entire snap-on seal from the connection hole. Throughout the process, the gripper and piercing head only act on the snap-on seal itself and do not directly contact the threaded connection or the housing of the metering equipment. This avoids thread stripping failure, scratching and damage to the equipment housing, and prevents external force from accidentally damaging the internal metering components of the equipment. At the same time, it simplifies the removal process of the snap-on seal and improves the convenience of the removal operation.

[0038] Figure 1 A schematic diagram of the snap-on seal removal device provided in the embodiments of this application; Figure 2 This is a first schematic diagram of the snap-on seal removal device provided in this application embodiment after the positioning component has been removed; Figure 3 A second schematic diagram of the snap-on seal removal device provided in this application embodiment after removing the positioning component; Figure 4 A schematic diagram of the positioning component in the snap-on seal removal device provided in the embodiments of this application; Figure 5 This is a schematic diagram of the snap-on seal removal device provided in this application embodiment before removing the snap-on seal; Figure 6 A schematic diagram illustrating the removal of a snap-on seal using the snap-on seal removal device provided in this application embodiment; Figure 7 for Figure 6 Enlarged view of point A in the middle.

[0039] You can refer to this. Figures 1 to 7This application provides a snap-on seal removal device 100 for removing a snap-on seal 200 from a threaded connector 310 on a metering device 300. The threaded connector 310 is installed at a connection hole 320 on the metering device 300. The snap-on seal removal device 100 includes:

[0040] Operations Unit 110;

[0041] The puncture head 120 is connected to the operating part 110;

[0042] The gripper 130 is connected to the operating part 110. The gripper 130 surrounds the periphery of the puncture head 120. The gripper 130 includes at least two puncture blades. The diameter of the gripper 130 matches the diameter of the connecting hole 320.

[0043] The positioning assembly 140 includes a suction cup 141 and a positioning ring 142 connected together. The inner diameter of the positioning ring 142 matches the diameter of the gripper 130. When removing the snap-on seal 200, the suction cup 141 is configured to adhere to the surface of the metering device 300 and be positioned around the opening of the connection hole 320. The gripper 130 is configured to pass through the positioning ring 142 and enter the connection hole 320 to pierce the snap-on seal 200 and the metering device 300 through the piercing tab and pierce the snap-on seal 200 through the piercing head 120, thereby removing the snap-on seal 200.

[0044] Specifically, the suction cup 141 and the positioning ring 142 can be connected together via the connector 143.

[0045] The snap-on seal removal device 100 provided in this embodiment allows the suction cup 141 to be first attached to the surface of the measuring device 300 during removal operations, providing a stable support point for subsequent force application. This solves the problems of traditional tools slipping easily due to lack of fixed support and limited force application space. Simultaneously, the positioning ring 142 stably surrounds the opening of the connecting hole 320, providing a guide channel for the gripper 130. Since the inner diameter of the positioning ring 142 matches the diameter of the gripper 130, the gripper 130 is positioned correctly when passing through the positioning ring 142. The inner wall of the positioning ring 142 restricts the radial movement of the gripper 130, ensuring that the gripper 130 can only extend into the connection hole 320 along the axial direction of the inner ring of the positioning ring 142. This ensures that the piercing piece of the gripper 130 is accurately aligned and inserted into the gap between the snap-on seal 200 and the inner wall of the connection hole 320, preventing the gripper 130 from shifting due to hand shaking. At the same time, the positioning ring 142 surrounding the opening of the connection hole 320 can also isolate the gripper 130, the piercing head 120 from the threaded connector 310 and the equipment housing, forming a physical protective barrier.

[0046] Subsequently, the handheld operating unit 110 pushes the gripper 130 along the positioning ring 142 and inserts it into the connecting hole 320. The piercing blade continues to move downward along the gap between the seal and the inner wall of the connecting hole 320, piercing the locking part between the seal and the inner wall of the connecting hole 320. At the same time, the piercing head 120 penetrates forward through the snap-on seal 200 body, and then pulls the removal device outward toward the outside of the connecting hole 320. The piercing head 120 uses the locking force after penetrating the seal to drive the seal outward, while the piercing blade of the gripper 130 clamps around the seal. Together with the piercing head 120, the snap-on seal 200 is removed from the connecting hole 320. Throughout the process, the gripper 130 and the piercing head 120 only act on the snap-on seal 200 itself, without directly contacting, squeezing, or bumping the threaded connector 310 and the housing of the metering equipment 300. This avoids thread stripping failure, scratching and damage to the equipment housing, and prevents external force from accidentally damaging the internal metering components of the equipment. At the same time, it simplifies the removal process of the snap-on seal 200 and improves the convenience and standardization of the removal operation.

[0047] In the above embodiments, a limiting ring 150 may also be included. The limiting ring 150 is disposed around the operating part 110, and the diameter of the limiting ring 150 is larger than the diameter of the gripper 130. The limiting ring 150 is used to abut against the end face of the positioning ring 142 when the gripper 130 passes through the connecting hole 320. The limiting ring 150 is installed around the operating part 110 and its overall diameter is larger than that of the gripper 130. During the dismantling operation, when the operator holds the operating part 110 and pushes the gripper 130 downward along the positioning ring 142 to continuously insert it into the connection hole 320 to puncture and break the snap-on seal 200, as the gripper 130 continues to descend, the larger diameter limiting ring 150 will move down synchronously with the operating part 110 and eventually abut against the upper end face of the limiting ring, forming a blocking limit. This limits the maximum downward feed depth of the gripper 130 and the piercing head 120, avoiding excessive downward pressure due to excessive force or hand deviation during manual operation. It also prevents the gripper 130 and the piercing head 120 from extending too far into the connection hole 320 and puncturing or damaging the internal precision components of the measuring equipment 300. This compensates for the uncontrollable depth of manual operation and further improves the safety and controllability of the dismantling operation.

[0048] In the above embodiments, an insulating sleeve 160 may also be included, which is at least fitted onto the operating part 110. It is understood that throughout the dismantling operation, the operator can hold the insulating sleeve 160 to complete all operational actions such as pressing down to pierce and pulling outwards. Specifically, the insulating sleeve 160 can be made of insulating materials such as rubber or silicone. On the one hand, rubber and silicone materials themselves have excellent electrical insulation properties, which can cut off the conductive path between the operator's hand and the metal body of the device. Even if the metering device 300 experiences line leakage or static electricity accumulation, it can effectively block current conduction, avoiding the risk of electric shock when removing the seal while it is energized on-site, and is suitable for maintenance scenarios of energized metering instruments such as electricity meters. On the other hand, the surface of silicone and rubber materials has fine anti-slip textures, which can increase the coefficient of friction between the palm and the gripping area of ​​the device, making it less likely for the hand to slip during the pressing down of the gripper 130 and the pulling out of the seal, stably transmitting the force applied by the hand, and further reducing the probability of the gripper 130 shifting and scratching the equipment due to slippage during operation. The insulating sleeve 160 can also extend to cover the outside of the limiting ring 150 to prevent operators from accidentally touching the limiting ring 150 and getting an electric shock.

[0049] In the above embodiments, an insulating cover 170 may also be included, which is used to cover the gripper 130. It is understood that when the device is stored or transported on-site, the insulating cover 170 can be placed over the gripper 130. The insulating cover 170 can completely cover the piercing tabs and metal tips of the piercing head 120 of the gripper 130, preventing workers from accidentally touching sharp metal parts with their fingers when handling or picking up the equipment, effectively avoiding the safety hazards of cuts and punctures to the hands. Furthermore, the insulating cover 170 is made entirely of insulating material, which can isolate all the conductive metal structures of the gripper 130. Even if the device comes into contact with a live metering box or exposed wiring during storage, a conductive circuit will not be formed, eliminating the risk of accidental leakage. In addition, the insulating cover 170 can form a physical protective barrier for the piercing head 120 and piercing tabs, preventing the tips of the gripper 130 from colliding or rubbing against other hard objects during transportation and storage, preventing tip curling and edge wear, maintaining the piercing sharpness of the gripper 130 for a long time, and ensuring the piercing effect when removing the seal later. When the seal removal operation is required, simply remove the insulating cover 170, and the gripper 130 can be pushed normally to complete the piercing and removal process. Specifically, the insulating cover 170 can be made of insulating materials such as rubber or hard insulating silicone, and can be completely fitted on the outside of the gripper 130 and the front piercing head 120 before and after the operation.

[0050] In the above embodiments, the operating unit 110 may include a handle 111 and a connecting rod 112. The first end of the connecting rod 112 is connected to the handle 111, and the piercing head 120 is connected to the second end of the connecting rod 112. It can be understood that the handle 111, as the main area for human hand gripping and operation, can stably apply force with the outer insulating sleeve 160. The connecting rod 112 plays the role of length extension and force transmission, completely transmitting the downward and lifting force at the handle 111 to the piercing head 120 at the front end and the peripheral gripper 130. The rigid structure of the connecting rod 112 ensures that the force transmission does not deform when the pushing gripper 130 descends to pierce and lifts to remove the seal. At the same time, the connecting rod 112 can reserve sufficient working distance to avoid the operator's hand being too close to the measuring device 300, further reducing the safety hazards during live work.

[0051] In the above embodiments, the extension directions of the connecting rod 112 and the handle 111 can be different. It is understood that the different extension directions of the connecting rod 112 and the handle 111 can form a bent structural layout. When the operator grips the handle 111 and applies force to press down or pull up, the angle at which the handle 111 conforms to the palm is offset from the feeding direction of the connecting rod 112 extending into the connecting hole 320. This eliminates the need to bring the hand close to the housing of the metering device 300 to complete the operation, avoiding the problem of the hand hitting the device housing and increasing the distance between the palm and the live metering components, further reducing the risk of electric shock during live work. Simultaneously, this offset layout optimizes the hand's force application posture, making the force application smoother when pressing down to pierce the seal, preventing interference between the hand and the device that could hinder force application or cause the gripper 130 to shift, thus improving the overall smoothness of the operation.

[0052] In the above embodiment, the outer side of the puncture head 120 may be provided with external threads. It is understood that the outer peripheral wall of the puncture head 120 is machined with a complete external thread structure. While the operator holds the handle 111 and applies downward pressure, they can simultaneously rotate the entire device, causing the front puncture head 120 to rotate as well. The helical teeth of the external threads generate a helical feeding thrust, combining vertical downward pressure with rotational torque. This rotational action is simultaneously transmitted to the puncture blades of the peripheral grippers 130, transforming the original vertical downward puncture mode into a rotational cutting mode. The puncture blades follow the rotational trajectory to cut the sealing sidewall and... The snap-fit ​​part of the connecting hole 320 continuously rotates and cuts. This cutting resistance is lower than that of simple vertical compression, which greatly saves effort in the overall operation. It does not rely on brute force to press down. At the same time, the force is evenly distributed, which can avoid the problem of large-area breakage caused by uneven force on the seal under direct pressure. When the piercing head 120 is screwed into the snap-fit ​​seal 200, the thread can tightly bite the seal to form a stable locking structure. When the device is pulled outward, the friction generated by the thread bite can firmly fix the seal, further reducing the difficulty of disassembling the seal.

[0053] In the above embodiments, the positioning ring 142 can be made of an elastic material. The positioning ring 142 is made entirely of elastic materials such as rubber or elastic silicone, offering multiple advantages: When the gripper 130 passes through the positioning ring 142 and feeds downwards, the inner wall of the elastic positioning ring 142 can elastically fit and wrap around the outer wall of the gripper 130, eliminating the gap between the gripper 130 and the positioning ring 142. This further restricts the radial swaying of the gripper 130, improves the coaxiality of the gripper 130's movement, and ensures a stable trajectory when the piercing disc rotates to cut and seal, preventing deviation and scratching of the connecting hole 320. The inner wall; secondly, when the limiting ring 150 descends and abuts against the end face of the positioning ring 142, the elastic positioning ring 142 can absorb the impact force generated by the collision between the two, buffer the impact of hard parts, reduce the wear and deformation caused by long-term impact of the end faces of the limiting ring 150 and the positioning ring 142, and extend the service life of the device; in addition, the elastic positioning ring 142 can also be adapted to the connection hole 320 with slight size deviation, and rely on its own deformation to fit the surface of the device housing, improve the overall sealing and fitting effect after the suction cup 141 is adsorbed, and enhance the adsorption firmness of the suction cup 141.

[0054] In the above embodiments, the positioning component 140 may further include a handle 144, which is connected to the suction cup 141. When the operator assembles or disassembles the suction cup 141, they can directly hold the handle 144 to complete the lifting and moving actions without having to directly pry at the edge of the suction cup 141. This avoids the rubber edge of the suction cup 141 cracking or falling off due to forceful tearing, thus extending the service life of the suction cup 141. During the adsorption and fixing stage, after the operator presses the suction cup 141 to adhere to the equipment housing, they can quickly check the firmness of the suction cup 141's adsorption by pulling the handle 144, and preemptively identify potential problems such as poor adsorption or easy slippage. When removing the device, simply pull one side of the handle 144 to pry open the edge of the suction cup 141 to introduce air, easily releasing the negative pressure adsorption state of the suction cup 141, reducing the difficulty of removing the suction cup 141, and eliminating the need for other tools to pry it off, making the operation convenient and efficient.

[0055] Specifically, the snap-on seal 200 may include a sealing plate 210 and a sleeve 220 connected together. The sealing plate 210 seals the connecting hole 320 on the outside of the threaded connector 310. The sleeve 220 surrounds the outer circumference of the threaded connector 310. The sleeve 220 has a snap 230 on its outer side, and the side wall of the connecting hole 320 has a groove 330. During installation, the sleeve 220 of the snap-on seal 200 is aligned with the gap between the threaded connector 310 and the side wall of the connecting hole 320 and inserted. The snap 230 on one side of the sleeve 220 automatically snaps into the groove 330, locking the snap-on seal 200 in the connecting hole 320. When disassembling the snap-on seal 200, the suction cup 141 of the positioning component 140 can be first attached to the outer surface of the connection hole 320 of the metering device 300, so that the positioning ring 142 is aligned and surrounds the opening of the connection hole 320 to complete the device positioning; remove the outer insulating cover 170 of the gripper 130, the operator holds the handle 111 of the operating part 110, aligns the piercing head 120 with the sealing plate 210 of the snap-on seal 200, aligns the gripper 130 with the annular gap between the sleeve 220 and the connection hole 320, and presses the device down along the guide of the positioning ring 142.

[0056] While pressing down, rotate the handle 111, causing the connecting rod 112, the piercing head 120, and the gripper 130 to rotate synchronously. The piercing head 120 uses its own external thread to spirally feed and pierce the sealing plate 210 and engage with the sealing plate 210 for fixation. The piercing disc on the gripper 130 extends into the annular gap between the sleeve 220 and the connecting hole 320, and pierces the buckle 230 of the slot 330 on the outside of the sleeve 220 by rotating and cutting, thereby releasing the engagement between the buckle 230 and the slot 330. After the limiting ring 150 moves down with the operating part 110 and abuts against the end face of the positioning ring 142, stop pressing down, and pull the handle 111 upward. With the help of the piercing head 120 engaging with the sealing plate 210 and the gripper 130 holding the sleeve 220, the entire snap-on seal 200 is removed from the connecting hole 320, completing the disassembly.

[0057] In the above embodiments, the operating part 110, the piercing head 120, the gripper 130, and the limiting ring 150 can be integrally formed from stainless steel. During the rotation and downward pressing piercing and sealing process, the torque and downward pressure transmitted by the handle 111 can be transmitted synchronously to the front piercing head 120 and the gripper 130 to the greatest extent, avoiding problems such as component slippage and angle deviation. The piercing head 120 can be vertically aligned with the sealing plate 210 and stably screwed into engagement. The piercing blade on the gripper 130 can accurately travel along the annular gap between the sleeve 220 and the connecting hole 320. When rotating and cutting the buckle 230, the trajectory does not deviate, effectively avoiding scratching the inner wall of the connecting hole 320 and incomplete cutting that results in buckle 230 residue. At the same time, after the stainless steel is heat-treated, With sufficient hardness and a one-piece continuous metal structure, it has excellent overall resistance to bending and impact. When the limiting ring 150 repeatedly impacts the elastic positioning ring 142, the piercing blade rotates and cuts the plastic buckle 230 for a long time, and the piercing head 120 continuously pierces the sealing plate 210, the connection points will not loosen, crack, or deform. The piercing blade edge is not easy to roll, and the end face of the limiting ring 150 is not easy to develop concave or convex deformation, which greatly extends the overall service life of the tool. It is suitable for the high-frequency maintenance of power metering equipment 300. In addition, this one-piece structure can also save the stamping, welding, and thread assembly processes of multiple parts, and avoid assembly defects such as incomplete welding and loose fasteners, reducing processing and assembly errors and later maintenance and repair costs.

[0058] Furthermore, this application embodiment also provides a measuring device 300, including the snap-on seal removal device 100 in the above embodiment. During the removal operation, the suction cup 141 can be first adsorbed onto the surface of the measuring device 300 to provide a stable support point for subsequent force application. The positioning ring 142 is stably surrounded at the opening of the connecting hole 320, which can provide a guide channel for the gripper 130 and restrict the radial movement of the gripper 130. Then, the hand-held operating part 110 pushes the gripper 130 along the positioning ring 142 to extend into the connecting hole 320. The piercing piece continues to move downward along the gap between the seal and the inner wall of the connecting hole 320, piercing the snap-on part between the seal and the inner wall of the connecting hole 320. At the same time, the piercing head 120 penetrates the snap-on seal 2 forward. The main body of the device is then pulled outward from the connection hole 320. The piercing head 120 moves the seal outward by the clamping force after penetrating the seal. The piercing plate of the gripper 130 clamps the outer perimeter of the seal and works together with the piercing head 120 to remove the entire snap-on seal 200 from the connection hole 320. Throughout the process, the gripper 130 and the piercing head 120 only act on the snap-on seal 200 itself and do not directly contact the threaded connector 310 and the outer shell of the metering device 300. This avoids thread stripping failure, scratching and damage to the equipment shell, and prevents external force from accidentally damaging the internal metering components of the equipment. At the same time, it simplifies the removal process of the snap-on seal 200, improves the convenience of the removal operation and the safety of the metering device 300.

[0059] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the various implementations of this application.

Claims

1. A snap-on tamper-evident device, characterized in that, For removing the snap-on seal (200) at the threaded connector (310) on the metering device (300), the threaded connector (310) being installed at the connection hole (320) on the metering device (300), the snap-on seal removal device comprising: Operations unit (110); A puncture head (120) is connected to the operating part (110). A gripper (130) is connected to the operating part (110). The gripper (130) surrounds the periphery of the puncture head (120). The gripper (130) includes at least two puncture blades. The diameter of the gripper (130) matches the diameter of the connecting hole (320). The positioning assembly (140) includes a suction cup (141) and a positioning ring (142) connected together. The inner diameter of the positioning ring (142) matches the diameter of the gripper (130). When the snap-on seal (200) is removed, the suction cup (141) is configured to adhere to the surface of the metering device (300). The positioning ring surrounds the opening of the connection hole (320). The gripper (130) is configured to pass through the positioning ring (142) and enter the connection hole (320) to pierce the snap-on seal (200) and the metering device (300) through the piercing piece, and pierce the snap-on seal (200) through the piercing head (120) to remove the snap-on seal (200).

2. The snap-on seal removal device according to claim 1, characterized in that, It also includes a limiting ring (150), which is disposed around the operating part (110), and the diameter of the limiting ring (150) is larger than the diameter of the gripper (130). The limiting ring (150) is used to abut against the end face of the positioning ring (142) when the gripper (130) passes through the connecting hole (320).

3. The snap-on seal removal device according to claim 1, characterized in that, It also includes an insulating sleeve (160), which is at least fitted onto the operating part (110).

4. The snap-on seal removal device according to claim 1, characterized in that, It also includes an insulating cover (170) for fitting over the gripper (130).

5. The snap-on seal removal device according to claim 1, characterized in that, The operating part (110) includes a handle (111) and a connecting rod (112), with the first end of the connecting rod (112) connected to the handle (111) and the puncture head (120) connected to the second end of the connecting rod (112).

6. The snap-on seal removal device according to claim 5, characterized in that, The extension direction of the connecting rod (112) is different from that of the handle (111).

7. The snap-on seal removal device according to any one of claims 1-6, characterized in that, The puncture head (120) has external threads on its outer side.

8. The snap-on seal removal device according to any one of claims 1-6, characterized in that, The positioning ring (142) is made of an elastic material.

9. The snap-on seal removal device according to any one of claims 1-6, characterized in that, The positioning component (140) also includes a handle (144) which is connected to the suction cup (141).

10. A measuring device, characterized in that, Includes the snap-on seal removal device as described in any one of claims 1 to 9.

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