A conductive paste application device

Abstract

The utility model discloses a kind of electrically conductive paste smearing devices, it is related to electric power operating appliance technical field, it mainly includes shell, screw elevator, rotating hand wheel, piston and spray head, the shell is used to contain electrically conductive paste, the piston is slidably arranged in the shell, the spray head is arranged at the end of the shell and is communicated with the shell, the rotating hand wheel is fixedly connected with the end of the worm of screw elevator, the lead screw of screw elevator is fixedly connected with the piston.The electrically conductive paste smearing device disclosed in the utility model quantifies the extrusion of electrically conductive paste basically, rotating hand wheel rotates a circle, the extrusion amount of electrically conductive paste is fixed, avoid the problem of uneven problem of more or less when artificial smearing, the extrusion amount of electrically conductive paste can be realized to be more accurate control.

Description

Technical Field

[0001] This utility model relates to the field of electrical work equipment technology, and in particular to a conductive paste application device. Background Technology

[0002] Lead wires are used to establish equipotential or transitional pathways during live-line work. When disconnecting or reconnecting lead wire clamps, wedge clamps, and parallel groove clamps, it is generally required to uniformly apply conductive grease to the metal contact surfaces to reduce contact resistance, inhibit electrochemical corrosion, and minimize fretting wear and heat generation. Currently, conductive grease is mostly applied by brush or hand squeezing, which is difficult to do precisely and results in poor uniformity, leading to high and highly variable contact resistance. Furthermore, current methods such as using disposable syringes / grease guns combined with brushes / cotton swabs, or applying with open sponge rollers, suffer from uncontrollable dosing, dripping contamination, and low efficiency with repeated application. Therefore, a conductive grease application device is urgently needed to solve these technical problems. Utility Model Content

[0003] The purpose of this invention is to provide a conductive paste application device to solve the problems existing in the prior art and to achieve more precise control of the extrusion amount.

[0004] To achieve the above objectives, this utility model provides the following solution:

[0005] This utility model provides a conductive paste application device, including a housing, a screw jack, a rotating handwheel, a piston, and a nozzle. The housing is used to hold conductive paste, the piston is slidably disposed within the housing, the nozzle is disposed at the end of the housing and communicates with the housing, the rotating handwheel is fixedly connected to the end of the worm gear of the screw jack, and the lead screw of the screw jack is fixedly connected to the piston.

[0006] In some embodiments, a torque limiter is also included, the input of which is fixedly connected to the axle of the rotating handwheel, and the output of the torque controller is fixedly connected to the end of the worm gear of the screw jack.

[0007] In some embodiments, the housing, the rotating handwheel, and the lead screw of the screw jack are made of insulating material.

[0008] In some embodiments, the housing includes a top cover, a bottom cover, and a cylindrical body, wherein the top cover and the bottom cover are detachably connected to the cylindrical body.

[0009] In some embodiments, an insulating connector is also included, which is fixedly disposed on the bottom cover and is used for fixed connection with the insulating operating rod.

[0010] In some embodiments, the nozzle includes an annular cylinder and a nozzle, the annular cylinder being fixedly connected to and communicating with the top cover, the cylinder body being annular, the diameter of the annular cylinder being smaller than the diameter of the cylinder body, and the nozzle being fixedly connected to and communicating with the annular cylinder.

[0011] In some embodiments, the nozzle is a V-shaped nozzle.

[0012] In some embodiments, an observation window is also included, wherein multiple observation windows are provided in both the radial and axial directions of the cylinder.

[0013] In some embodiments, an insulating scraper is also included, which is fixedly disposed on the annular cylinder and located on one side of the nozzle.

[0014] In some implementations, the rotating handwheel has a built-in rotation counter.

[0015] The present invention achieves the following technical advantages over the prior art:

[0016] The conductive paste application device provided by this utility model essentially quantifies the extrusion of conductive paste. Rotating the handwheel once fixes the amount of paste extruded, avoiding the uneven distribution problems associated with manual application and enabling precise control over the amount of paste extruded. Furthermore, the device mainly consists of a housing, a screw conveyor, a rotating handwheel, a piston, and a nozzle, resulting in a relatively simple structure without complex electronic or hydraulic control systems. This reduces manufacturing and maintenance costs, lowers the probability of malfunctions, improves reliability and stability, and facilitates use in various environments. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the conductive paste application device in some embodiments of the present invention;

[0019] Figure 2 This is a cross-sectional view of the conductive paste application device in some embodiments of this utility model.

[0020] In the diagram: 1-shell; 101-top cover; 102-cylinder; 103-bottom cover; 2-handwheel; 3-screw; 4-nozzle; 41-nozzle; 42-annular cylinder; 5-observation window; 6-insulating connection seat; 7-piston. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] The purpose of this invention is to provide a conductive paste application device to solve the problems existing in the prior art and to achieve more precise control of the extrusion amount.

[0023] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0024] like Figures 1-2 As shown, this utility model provides a conductive paste application device, including a housing 1, a screw jack, a rotating handwheel 2, a piston 7, and a nozzle 4. The housing 1 is used to hold the conductive paste. The piston 7 is slidably disposed within the housing 1. The nozzle 4 is disposed at the end of the housing 1 and communicates with it. The rotating handwheel 2 is fixedly connected to the end of the worm gear of the screw jack, and the screw 3 of the screw jack is fixedly connected to the piston 7. This device essentially quantifies the extrusion of the conductive paste. One rotation of the rotating handwheel 2 results in a fixed amount of paste extruded, avoiding the uneven distribution that occurs with manual application. It enables precise control of the extruded amount of conductive paste. Furthermore, the conductive paste application device mainly consists of the housing 1, screw jack, rotating handwheel 2, piston 7, and nozzle 4, resulting in a relatively simple structure. The absence of a complex electronic or hydraulic control system lowers the manufacturing and maintenance costs, reduces the probability of malfunctions, improves reliability and stability, and facilitates use in various environments.

[0025] It should be noted that the rotating handwheel 2 is preferably cylindrical in shape, and its outer surface is provided with anti-slip texture. There are two screw jacks, located on both sides of the rotating handwheel 2, and each end of the rotating handwheel 2 is fixedly connected to the worm gear of one screw jack. The rotating handwheel 2 can also be in the form of a crank handle, etc.

[0026] Other points to note include the integration of a heating element within the housing 1. In low-temperature environments, this heating element heats the conductive paste, maintaining its viscosity and ensuring proper extrusion. The heating element's power is maintained at 5-10W to achieve low-temperature heating, preventing a sudden temperature increase and keeping the conductive paste at 15-25℃.

[0027] In some embodiments, the conductive paste application device further includes a torque limiter. The input end of the torque limiter is fixedly connected to the axle of the rotating handwheel 2, and the output end of the torque controller is fixedly connected to the end of the worm gear of the screw jack. The torque limiter can be preset with a safe torque threshold. When abnormal resistance occurs in the device (such as the conductive paste drying and clumping inside the housing 1, the piston 7 being stuck by foreign objects, or the nozzle 4 being blocked, preventing the paste from being extruded smoothly), the torque of the transmission system will momentarily exceed the set value. At this time, the torque limiter will cut off the power transmission through slippage or disengagement, preventing the precision transmission components such as the screw 3 and worm gear of the screw jack from deforming or having their teeth damaged due to overload. It can also protect the piston 7 from breaking due to forced force, fundamentally reducing the risk of wear and tear of core components and significantly extending the overall service life of the device. Without a torque limiter, when the nozzle 4 contacts the workpiece surface or the paste outlet is blocked due to improper operation, the operator may cause excessive local accumulation of paste by continuously rotating the handwheel 2. The torque limiter can trigger protection in time when the paste extrusion resistance suddenly increases or after the number of rotations reaches the preset value, preventing the piston 7 from continuing to advance, ensuring that the amount of paste extruded each time is consistent with the preset value, avoiding uncontrolled coating amount due to human operation error or equipment jamming, and ensuring that the coating quality of the electrical contact surface meets the process requirements.

[0028] In some embodiments, the housing 1, the rotating handwheel 2, and the screw 3 of the auger are made of insulating material, preferably glass fiber reinforced plastic (GFRP) or epoxy resin, a highly insulating material. The insulating material completely blocks the current conduction path, ensuring that even if an operator touches the handwheel, housing 1, or the screw 3 accidentally comes into contact with metal parts of the equipment in a live environment, no conductive circuit will be formed, fundamentally preventing electric shock accidents. This is especially suitable for safe operation requirements in high-voltage power scenarios.

[0029] In some embodiments, the housing 1 includes a top cover 101, a bottom cover 103, and a cylinder 102. Both the top cover 101 and the bottom cover 103 are detachably connected to the cylinder 102, ensuring good sealing. For example, they can be snap-fit ​​or threaded connections. When the conductive paste inside the housing 1 is depleted, there is no need to replace the entire housing 1; simply removing the top cover 101 or the bottom cover 103 allows for direct replenishment of paste into the cylinder 102. Compared to a one-piece housing 1 requiring reverse filling from a narrow nozzle 4, the detachable structure significantly shortens filling time and reduces paste spillage and waste.

[0030] In some embodiments, the conductive paste application device further includes an insulating connector 6, which is fixedly mounted on the bottom cover 103 and is used for fixed connection with the insulating operating rod. The terminals of electrical equipment are often located at high places, in narrow spaces, or in locations with many obstacles, making them difficult to reach directly by hand. The length of the insulating operating rod can be flexibly selected (e.g., 1 meter to 5 meters), and some operating rods can be bent or extended. After connection via the insulating connector 6, the operator can use the length and shape of the operating rod to align the nozzle 4 with the target position, fix the insulating operating rod, and then turn the handwheel 2 to apply the conductive paste. It should be noted that the interface of the insulating operating rod can be a tapered self-locking type, a bayonet type, or a threaded type, and the corresponding insulating connector 6 uses a tapered lock head, a buckle, or an external thread to connect with the insulating operating rod.

[0031] In some embodiments, the nozzle 4 includes an annular cylinder 42 and a nozzle 41. The annular cylinder 42 is fixedly connected to and communicates with the top cover 101. The cylinder body 102 is annular, and the diameter of the annular cylinder 42 is smaller than the diameter of the cylinder body 102. The nozzle 41 is fixedly connected to and communicates with the annular cylinder 42. The nozzle 41 can be designed with a narrow diameter or a specific shape (such as a flat nozzle) to concentrate and guide the conductive paste to the target area (such as the contact surface of the wiring terminals of electrical equipment or the electrode points of electronic components). Compared with an open outlet without a nozzle 41, this structure can prevent the paste from spreading in unnecessary areas. Especially for small-area, high-precision coating needs, it can accurately control the paste coverage area, significantly reduce waste, and lower consumable costs. The diameter of the annular cylinder 42 is smaller than the diameter of the cylinder body 102, and its internal channels can form a certain flow-limiting distribution effect. When the piston 7 pushes the conductive paste into the annular cylinder 42, the narrowing of the channels allows the paste to flow out more smoothly, ultimately making the extrusion of the conductive paste more uniform and ensuring the extrusion effect.

[0032] The conveying rate of the housing 1 to the annular cylinder 42 is approximately 0.3-1.5 mL / revolution, and the amount of conductive paste applied to the wire is approximately 0.5-2.0 mL.

[0033] In some embodiments, nozzle 41 is a V-shaped nozzle. The conductive connection parts of electrical equipment (such as bolt terminals and cylindrical terminals) are often curved or cylindrical surfaces. The opening of the V-shaped nozzle forms a V-angle, allowing it to naturally conform to these curved surfaces. The extruded conductive paste is evenly distributed along the V-groove on the contact surface, eliminating the need for repeated adjustments to the nozzle 41 angle or multiple recoating applications. Compared to circular nozzles, which require rotating around the terminal for application, the V-shaped nozzle can achieve uniform coverage of half or even the entire circumference with a single push, significantly improving coating efficiency. The groove width and depth of the V-shaped nozzle can be pre-designed according to the standard coating thickness (e.g., 0.2-0.6 mm). Under the constraint of the V-groove, the extruded paste forms a thin sheet or strip that matches the groove shape, with minimal thickness error. This avoids the localized accumulation (too thick, affecting conductivity) or missed coating (too thin, failing to provide protection) caused by deviations in the operating angle of circular nozzles, ensuring that the coating thickness meets process requirements each time and guaranteeing stable electrical contact performance.

[0034] In a preferred embodiment, the end of nozzle 41 is configured as a one-way valve. When the handwheel 2 is stopped, the piston 7 no longer advances, and the conductive paste inside the housing 1 may backflow due to its own weight, external vibration, or the nozzle 41 being placed downwards. The one-way valve only allows the paste to flow out of the nozzle 41; it automatically closes in the opposite direction, completely blocking the backflow channel. Conductive paste requires high purity; if air, dust, moisture, or other impurities are mixed in, its conductivity and oxidation resistance will be reduced, and it may even corrode the contact surfaces of electrical equipment. The one-way valve remains closed when not in operation, completely isolating the paste inside the housing 1 from the external environment and preventing dust and moisture from entering the housing 1 through the nozzle 41 and contaminating the paste. Even when operating in dusty and humid environments such as outdoors or substations, the paste can maintain its original performance for a long time.

[0035] It should be noted that a safety valve can also be installed at the end of the nozzle 41. The safety valve has a spring. Only when the nozzle 41 contacts the wire and the operator presses the nozzle 41 tightly against the wire, will the safety valve open due to the force exerted by the wire. This improves safety to a certain extent and prevents conductive paste from being squeezed out before the nozzle 41 is in position.

[0036] In some embodiments, the conductive paste application device further includes observation windows 5, with multiple observation windows 5 arranged in both the radial and axial directions of the cylinder 102. The axially distributed observation windows 5 can cover the entire height of the cylinder 102 from top to bottom, allowing the operator to directly see the position of the upper surface of the paste (and the bottom of the piston 7) and accurately determine the remaining amount. Compared to a single observation window 5 which can only estimate the approximate remaining amount, multiple axial observation windows 5 can provide early warning that the paste is about to run out, facilitating timely replenishment and avoiding supply interruptions during the coating operation, ensuring a continuous workflow. The radially distributed observation windows 5 allow viewing the overall state of the conductive paste inside the cylinder 102 from different angles, including whether there are problems such as drying, layering, clumping, or impurities. For example, conductive paste may layer due to temperature changes or become contaminated with air bubbles due to improper sealing during long-term storage. These abnormalities can be quickly detected through multiple radial observation windows 5, preventing the use of deteriorated paste that could affect coating quality or even damage the contact surfaces of electrical equipment.

[0037] In a preferred embodiment, the observation window 5 is fitted with a transparent PC protective sheet and a dustproof sealing ring. The transparent PC protective sheet (polycarbonate) has high impact resistance and abrasion resistance, directly resisting bumps and scratches in the working environment, preventing damage to the substrate of the observation window 5, ensuring long-term clear visibility, and eliminating the need for frequent replacement of the cylinder 102. The dustproof sealing ring tightly fits the gap between the PC protective sheet and the cylinder 102, completely blocking external dust, moisture, oil, and other impurities from entering the housing 1. Combined with the physical barrier of the PC protective sheet, a double seal is formed, preventing impurities from contaminating the conductive paste through the gaps in the observation window 5 (such as causing the paste to dry and reduce conductivity), while also preventing the paste from leaking from the gaps, making it particularly suitable for dusty and humid working environments such as substations and outdoor locations.

[0038] It should be noted that a scale line or an electronic balance sensor can be added to the observation window 5 to facilitate accurate observation of the remaining amount of conductive paste.

[0039] In some embodiments, the conductive paste application device further includes an insulating scraper, which is fixedly mounted on the annular cylinder 42 and located on one side of the nozzle 41. After the nozzle 41 completes the spraying, the insulating scraper evenly smooths the paste, ensuring that the conductive paste is evenly distributed on the wire. The insulating scraper can be an arc-shaped plate or have a circular hole with a diameter slightly larger than the wire. The conductivity of the conductive paste depends on the uniform coating thickness (typically 0.2-0.6 mm). If it is too thick, it will easily generate resistance; if it is too thin, it will not form effective protection. The insulating scraper can remove the excess paste squeezed out by the nozzle 41, so that the paste forms a uniform thin layer along the surface of the wire.

[0040] In some embodiments, the handwheel 2 has a built-in rotation counter. The rotation counter can directly display the total number of rotations, allowing the operator to precisely control the number of rotations according to process requirements.

[0041] This utility model uses specific examples to illustrate its principles and implementation methods. The above description of the embodiments is only for the purpose of helping to understand the method and core idea of ​​this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the idea of ​​this utility model. In summary, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A conductive paste application device, characterized in that: The device includes a housing, a screw jack, a rotating handwheel, a piston, and a nozzle. The housing is used to hold conductive paste. The piston is slidably disposed within the housing. The nozzle is disposed at the end of the housing and communicates with the housing. The rotating handwheel is fixedly connected to the end of the worm gear of the screw jack, and the lead screw of the screw jack is fixedly connected to the piston.

2. The conductive paste application device according to claim 1, characterized in that: It also includes a torque limiter, the input end of which is fixedly connected to the axle of the rotating handwheel, and the output end of which is fixedly connected to the end of the worm gear of the screw jack.

3. The conductive paste application device according to claim 1, characterized in that: The housing, the rotating handwheel, and the lead screw of the screw jack are made of insulating material.

4. The conductive paste application device according to claim 1, characterized in that: The housing includes a top cover, a bottom cover, and a cylindrical body, and the top cover and the bottom cover are detachably connected to the cylindrical body.

5. The conductive paste application device according to claim 4, characterized in that: It also includes an insulating connector, which is fixedly mounted on the bottom cover and is used to be fixedly connected to the insulating operating rod.

6. The conductive paste application device according to claim 4, characterized in that: The nozzle includes an annular cylinder and a nozzle. The annular cylinder is fixedly connected to and communicates with the top cover. The cylinder body is annular, and the diameter of the annular cylinder is smaller than the diameter of the cylinder body. The nozzle is fixedly connected to and communicates with the annular cylinder.

7. The conductive paste application device according to claim 6, characterized in that: The nozzle is a V-shaped nozzle.

8. The conductive paste application device according to claim 6, characterized in that: It also includes observation windows, with multiple observation windows provided in both the radial and axial directions of the cylinder.

9. The conductive paste application device according to claim 6, characterized in that: It also includes an insulating scraper, which is fixedly mounted on the annular cylinder and located on one side of the nozzle.

10. The conductive paste application device according to claim 1, characterized in that: The rotating handwheel has a built-in rotation counter.

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