An electrically fused soldered disconnect terminal and electrically fused pipe fitting

Abstract

The utility model relates to the technical field of electric melting pipe fitting more particularly, relate to a kind of anti electric melting welding circuit wiring terminal and electric melting pipe fitting, wiring terminal includes terminal post main body and enameled resistance wire, terminal post main body lower end is provided with tooth slot, two sides of tooth slot are provided with a plurality of first sawtooth part and a plurality of second sawtooth part respectively, the width of tooth slot is less than the diameter of enameled resistance wire, first sawtooth part and second sawtooth part are jointly clamped and compress tightly one end of enameled resistance wire.The wiring terminal of the utility model can adapt to thermal expansion working condition, maintain stable conduction connection.

Description

Technical Field

[0001] This utility model relates to the technical field of electrofusion fittings, and more specifically, to an anti-electrofusion welding circuit breaker terminal and an electrofusion fitting. Background Technology

[0002] In the field of electrofusion pipe fittings technology, electrofusion welding, as an important method of pipe connection, is widely used in the splicing of various pipe materials. Its principle involves heating a resistance wire embedded inside the electrofusion fitting, causing the polymer material at the contact surface between the fitting and the pipe to melt and expand. After cooling, this forms a stable connection structure with intermolecular fusion. The continuity between the resistance wire and the external power supply depends on the reliable fixing of the terminals. Traditional automated production processes generally use a snap-fit ​​terminal structure, achieving the connection between the resistance wire and the terminals through mechanical pressing.

[0003] However, existing snap-fit ​​electrofusion fittings have significant technical defects in actual welding processes. When the fitting body expands due to heat, the stress generated by the internal material expansion acts on the terminal mounting area, causing a sharp drop in contact pressure or even complete failure of the snap-fit ​​structure. During this process, the electrical connection between the resistance wire and the terminal is easily interrupted by mechanical displacement, leading to a break in the welding circuit, severely damaging the stability of the welding thermal field, and causing uncontrolled temperature at the fusion interface or localized incomplete welds. This not only affects the sealing strength of the pipeline system but may also lead to rework due to welding failure. Although existing technologies have attempted to improve the situation by optimizing the terminal shape or adding auxiliary fixing components, they have failed to effectively balance the contradiction between material thermal deformation and electrical connection stability, and bottlenecks such as increased process complexity and cost remain. Therefore, the industry needs to develop a terminal structure solution that can adapt to thermal expansion conditions and maintain a stable conductive connection. Utility Model Content

[0004] The purpose of this invention is to overcome the difficulty of maintaining a stable conductive connection in the existing electrofusion fitting terminals under thermal expansion conditions, which can lead to circuit breakage during welding. This invention provides a terminal that prevents electrofusion welding circuit breakage.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0006] A terminal block for preventing electrofusion welding circuit breakage is provided, including a terminal block body. The lower end of the terminal block body is provided with a toothed groove. The two sides of the toothed groove are respectively provided with a plurality of first serrated portions and a plurality of second serrated portions. The first serrated portions and the second serrated portions are used to jointly clamp and press one end of the enameled resistance wire.

[0007] In the above-described process, the entire terminal block is installed on the terminal base of the electrofusion fitting. During electrofusion welding, the spirally wound enameled resistance wire carries current through the terminal block body. The enameled resistance wire converts electrical energy into heat energy due to its own resistance characteristics, generating Joule heat to melt the enamel layer and the plastic around the inner sheath. The plastic changes from a solid state to a viscous flow state, and the expansion generates significant thermal stress, pushing the terminal block and causing it to move mechanically. At this time, since the width of the groove is smaller than the diameter of the enameled resistance wire, the first and second sawtooth parts can hold the enameled resistance wire in place through the sawtooth. Since the enameled resistance wire is spirally wound on the inner sheath, the enameled resistance wire can stably hold the terminal block when it moves mechanically, preventing the expansion stress from pushing the terminal block out and causing a break in the welding circuit.

[0008] Furthermore, the terminal block also includes a support body and a mounting body. The mounting body and the main body of the terminal block are respectively located at both ends of the support body, and the tooth groove is located on the mounting body. The terminal block is divided into three parts in the axial direction. The main body of the terminal block is electrically connected to the outside, and the mounting body is embedded in the electrofusion fitting to form a stable connection.

[0009] Furthermore, the first serrated portion and the second serrated portion are staggered. The staggered arrangement is such that the tooth tip of the first serrated portion is opposite to the tooth root or tooth surface of the second serrated portion. This arrangement can better clamp the enameled resistance wire and improve the stability of the conductive connection.

[0010] An anti-electrofusion welding circuit-breaking electrofusion pipe fitting includes an inner sleeve, an outer sleeve, and a terminal base. The outer sleeve covers the inner sleeve, and the terminal base penetrates the outer sleeve and is fixedly connected to the inner sleeve base. It also includes an anti-electrofusion welding circuit-breaking terminal. An enameled resistance wire is wound around the outer wall of the inner sleeve, and a mounting body is installed inside the terminal base. The inner sleeve and terminal base are integrally formed during the first injection molding process. After the inner sleeve is injection molded, the enameled resistance wire is wound around it. A robotic arm pushes the terminal, inserting one end of the enameled resistance wire into a toothed groove. The enamel coating on the enameled resistance wire is scraped away through the first and second serrated sections to form an exposed section. The exposed section of the enameled resistance wire is located between the first and second serrated sections. Finally, the entire terminal is inserted into the terminal base, and then a second injection molding process is performed. The inner sleeve is placed in a mold, and the outer sleeve is directly injection molded, so that the outer sleeve covers the entire inner sleeve, completing the manufacturing of the entire pipe fitting.

[0011] Furthermore, the wiring base is provided with an installation cavity, and the mounting body is inserted into the installation cavity; the wiring base includes a first mounting wall and a second mounting wall arranged opposite to each other, both of which are provided with mounting grooves, and the mounting grooves are arranged opposite to each other to form an installation cavity, the mounting body is inserted into the installation cavity, the wiring base and the inner sleeve are integrally formed during the first injection molding, and the wiring base is configured to provide installation space for the wiring terminals.

[0012] Furthermore, the two opposite side walls of the wiring base are provided with guide grooves; the side of the guide groove is composed of two opposite surfaces, the first mounting wall and the second mounting wall. In actual production, the enameled resistance wire of the electrofusion fitting is automatically wound by machinery. The guide groove can provide positioning points for the robot arm to ensure that the position of the enameled resistance wire entering and exiting is the same each time, thereby improving the standardization of product winding.

[0013] Furthermore, the guide groove includes a flared portion and a constricted portion. The flared portion is located at the top of the constricted portion, and the inner wall surface of the flared portion is an inclined surface with the top sloping outward. After the winding of the enameled resistance wire is completed, both ends of the enameled resistance wire are located in the guide groove. At this time, the robot arm takes the enameled resistance wire out of the guide groove, and then uses the first and second sawtooth portions to scrape off the enamel layer on the enameled resistance wire. After completion, the enameled resistance wire is clamped and installed between the first and second sawtooth portions. Finally, the entire mounting body is inserted into the mounting cavity. The flared portion increases the positioning space for the robot arm to enter and exit the wire, making it easier for the robot arm to introduce and remove the enameled resistance wire into the guide groove. The constricted portion is used to accurately place the enameled resistance wire and ensure accurate positioning. The side of the flared portion is inclined, which allows the enameled resistance wire to enter the guide groove better.

[0014] Furthermore, the main body of the terminal block is provided with a through hole, and the support body further includes a first support wall and a second support wall, which form the through opening. The through hole communicates with the through opening. After the mounting body is inserted into the mounting cavity, the guide groove communicates with the through hole. Both ends of the first support wall and the second support wall are respectively fixedly connected to the main body of the terminal block and the mounting body. During the second injection molding of the outer jacket layer, excess molten material can enter the through hole of the main body of the terminal block through the through opening and then flow out from the through hole. This design disperses injection pressure, preventing excessive pressure from deforming the terminal block or causing poor contact due to separation between the mounting body and the enameled resistance wire. Simultaneously, the molten material fills the through-hole, and upon cooling, provides support for the cylindrical terminal block body, preventing it from being flattened during use. Since the support body requires an opening, this would reduce its structural strength. If the structural strength is too low, the injection pressure during the outer layer injection molding process could bend the support body. Therefore, the double-support wall design effectively improves the structural strength of the support body, preventing it from bending.

[0015] Furthermore, it also includes an anti-overflow ring. A shoulder is provided on the shaft section of the terminal body near the support. The anti-overflow ring includes a baffle and a retainer fixedly connected to each other. The anti-overflow ring is fitted onto the terminal, with the shoulder abutting against the baffle and the retainer abutting against the outer sleeve during installation. To ensure welding quality and stability, the connector of the electrofusion welding machine and the terminal body need sufficient contact area to avoid excessive contact resistance after energization. Therefore, an anti-overflow ring is installed on the terminal body to prevent burrs from forming during injection molding and covering the terminal, which would reduce the contact area and cause excessive contact resistance during conductive connection. After the mounting body is inserted into the mounting cavity, the baffle of the anti-overflow ring has an annular contact area with the outer surface of the outer sleeve. When the hot-melted plastic expands and overflows, the annular area can press down the overflow surface, while preventing a small amount of overflowing plastic from moving axially and forming burrs that directly contact the terminal body.

[0016] Furthermore, it also includes a temperature sensor, one end of which is mounted on the outer wall of the outer jacket, and the other end passes through the outer jacket and abuts against the inner jacket portion wrapped with the enameled resistance wire. The temperature sensor uses RFID wireless identification technology, with a passive tag attached to the outer surface of the outer jacket, and the sensor set on the inner jacket. The RFID chip binds the temperature data with the tag ID and stores it in memory. The tag supports dynamic temperature value updates. The tag modulates the temperature data into a radio frequency signal through an antenna and returns it to the reader when it is read. The reader uploads the received temperature data to the background system for real-time monitoring, alarm, or recording and analysis. The temperature monitoring process does not require wiring and supports remote, multi-point temperature monitoring.

[0017] Compared with the prior art, the beneficial effects of this utility model are:

[0018] 1. The lower end of the terminal block body is provided with a toothed groove. Several first serrations and several second serrations are provided on the two sides of the toothed groove. The width of the toothed groove is smaller than the diameter of the enameled resistance wire. The first serrations and the second serrations can hold the enameled resistance wire in place through the serrations. The enameled resistance wire can stably hold the terminal block when the terminal block is mechanically displaced, preventing the expansion stress from pushing the terminal block out and causing the soldering circuit to break. It can effectively adapt to thermal expansion conditions and maintain a stable conductive connection.

[0019] 2. The wiring base is equipped with a guide groove, which includes a flared part and a constricted part. The inner wall of the flared part is a sloping surface with the top end tilted outward, which can provide a positioning point for the robot arm and ensure that the position of the enameled resistance wire entering and exiting is the same each time. Attached Figure Description

[0020] Figure 1 A three-dimensional view of a type of anti-electrofusion welding circuit breaker terminal block from one angle;

[0021] Figure 2 This is a schematic diagram of a type of anti-electrofusion welding circuit breaker terminal from another angle;

[0022] Figure 3 for Figure 2 A magnified view of a section at point C;

[0023] Figure 4 A schematic diagram of the internal structure of an electrofusion pipe fitting designed to prevent circuit breakage during electrofusion welding.

[0024] Figure 5 for Figure 4 A magnified view of a section at point A in the middle;

[0025] Figure 6 A schematic diagram of the internal structure of the wiring base of an electrofusion pipe fitting designed to prevent electrofusion welding circuit breakers;

[0026] Figure 7 for Figure 4 A magnified view of a section at point B in the middle;

[0027] Figure 8 A schematic diagram of a guide groove structure for an electrofusion welding fitting designed to prevent circuit breakage during electrofusion welding;

[0028] Figure 9 This is a schematic diagram of the anti-overflow ring.

[0029] In the attached diagram: 100, terminal block body; 110, through hole; 120, shoulder; 200, support body; 210, first support wall; 220, second support wall; 230, through opening; 300, mounting body; 310, toothed groove; 311, first serrated part; 312, second serrated part; 400, enameled resistance wire; 500, inner sleeve layer; 600, terminal base; 610, first mounting wall; 620, second mounting wall; 630, mounting cavity; 640, guide groove; 641, flared part; 642, constricted part; 700, outer sleeve layer; 800, anti-overflow ring; 810, baffle part; 820, card holder; 900, temperature sensor. Detailed Implementation

[0030] The present invention will be further described below with reference to specific embodiments. The accompanying drawings are for illustrative purposes only, representing schematic diagrams rather than actual physical objects, and should not be construed as limiting the scope of this patent. To better illustrate the embodiments of the present invention, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0031] In the accompanying drawings of this utility model, the same or similar reference numerals correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper," "lower," "left," and "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0032] Example 1

[0033] This embodiment is a first embodiment of a terminal block designed to prevent electrofusion welding circuit breakers, such as... Figures 1 to 3 As shown, the device includes a terminal block body 100, characterized in that a toothed groove 310 is provided at the lower end of the terminal block body 100, and a plurality of first serrated portions 311 and a plurality of second serrated portions 312 are respectively provided on the two sides of the toothed groove 310. The first serrated portions 311 and the second serrated portions 312 are used to jointly clamp and press one end of the enameled resistance wire 400.

[0034] Specifically, the terminal block also includes a support body 200 and a mounting body 300. The mounting body 300 and the terminal block body 100 are located at the two ends of the support body 200, and the toothed groove 310 is located on the mounting body 300. The terminal block is divided into three parts in the axial direction. The terminal block body 100 is electrically connected to the outside, and the mounting body 300 is embedded in the electrofusion fitting to form a stable connection.

[0035] Specifically, the first serrated portion 311 and the second serrated portion 312 are staggered. The staggered arrangement is such that the tooth tip of the first serrated portion 311 is opposite to the tooth root or tooth surface of the second serrated portion 312. This arrangement can better clamp the enameled resistance wire 400 and improve the stability of the conductive connection.

[0036] The working principle of an anti-electrofusion welding circuit breaker electrofusion pipe fitting in this embodiment is as follows:

[0037] The enameled resistance wire 400 carries current through the terminal body 100. The enameled resistance wire 400 converts electrical energy into heat energy using its own resistance characteristics, generating Joule heat that melts the enamel layer and the plastic surrounding the inner sheath 500. This causes the plastic to change from a solid state to a viscous flow state and expand, generating significant thermal stress. This thermal stress pushes the terminal, causing mechanical displacement. At this time, because the width of the groove 310 is smaller than the diameter of the enameled resistance wire 400, the interlocking first serration 311 and second serration 312 can hold the enameled resistance wire 400 in place. Since the enameled resistance wire 400 is spirally wound around the inner sheath 500, the enameled resistance wire 400 can stably hold the terminal in place when it undergoes mechanical displacement, preventing the expansion stress from pushing the terminal out and causing a break in the soldered circuit.

[0038] The beneficial effects of this embodiment are as follows: the first serrated part 311 and the second serrated part 312 are staggered and can stably engage and fix the enameled resistance wire 400. The enameled resistance wire 400, which is spirally wound inside the pipe, pulls the entire terminal block, effectively preventing the expansion stress from pushing the terminal block out and causing the welding circuit to break. It effectively adapts to thermal expansion conditions and maintains a stable conductive connection.

[0039] Example 2

[0040] This embodiment is a first embodiment of an electrofusion pipe fitting designed to prevent electrofusion welding circuit breakers, such as... Figures 2 to 8As shown, the device includes an inner sleeve 500, an outer sleeve 700, and a terminal base 600. The outer sleeve 700 covers the inner sleeve 500, and the terminal base 600 penetrates the outer sleeve 700 and is fixedly connected to the base of the inner sleeve 500. It also includes an anti-electrofusion welding circuit breaker terminal as described in Embodiment 1. An enameled resistance wire 400 is wrapped around the outer wall of the inner sleeve 500, and a mounting body 300 is installed inside the terminal base 600. The inner sleeve 500 and the terminal base 600 are integrally formed during the first injection molding process. After the injection molding of the inner sleeve 500 is completed, the enameled resistance wire 400 is wound around it. Simultaneously, one end of the enameled resistance wire 400 is inserted into the toothed groove 310. The enamel coating on the enameled resistance wire 400 is scraped off by the serrations on the first serration 311 and the second serration 312 to form an exposed section. After completion, the exposed section of the enameled resistance wire 400 is located between the first serration 311 and the second serration 312. Finally, the entire terminal is inserted into the terminal base 600, and then a second injection molding is performed. The inner sleeve 500 is placed into the mold, and the outer sleeve 700 is directly injection molded so that the outer sleeve 700 covers the entire inner sleeve 500, thus completing the manufacturing of the entire pipe fitting.

[0041] Specifically, the wiring base 600 is provided with a mounting cavity 630, and the mounting body 300 is inserted into the mounting cavity 630. In this embodiment, the wiring base 600 includes a first mounting wall 610 and a second mounting wall 620 arranged opposite to each other. Both the first mounting wall 610 and the second mounting wall 620 are provided with mounting grooves. The mounting grooves are arranged opposite to each other to form the mounting cavity 630. The mounting body 300 is inserted into the mounting cavity 630. The wiring base 600 and the inner sleeve layer 500 are integrally formed during the first injection molding. The wiring base 600 is configured to provide mounting space for the wiring terminals.

[0042] Specifically, the two opposite side walls of the wiring base 600 are provided with guide grooves 640; the side of the guide groove 640 is composed of two opposite surfaces, the first mounting wall 610 and the second mounting wall 620. In actual production, the enameled resistance wire 400 of the electrofusion fitting is automatically wound by a machine. The setting of the guide groove 640 can provide positioning points for the robot arm to ensure that the position of the enameled resistance wire 400 entering and exiting the wire is the same each time, thereby improving the standardization of product winding.

[0043] Specifically, the guide groove 640 includes a flared portion 641 and a constricted portion 642. The flared portion 641 is located at the top of the constricted portion 642, and the inner wall surface of the flared portion 641 is an inclined surface with the top end sloping outward. The flared portion 641 increases the positioning space for the robot to enter and exit the wire, making it easier for the robot to introduce the enameled resistance wire 400 into the guide groove 640. The constricted portion 642 is used to accurately place the enameled resistance wire 400 and ensure accurate positioning. The side of the flared portion 641 is an inclined surface, which allows the enameled resistance wire 400 to enter the guide groove 640 better.

[0044] Specifically, the terminal block body 100 is provided with a through hole 110, and the support body 200 also includes a first support wall 210 and a second support wall 220, which form a through opening 230. The through hole 110 communicates with the through opening 230. After the mounting body 300 is inserted into the mounting cavity 630, the guide groove 640 communicates with the through hole 110. Both ends of the first support wall 210 and the second support wall 220 are respectively fixedly connected to the terminal block body 100 and the mounting body 300. During the second injection molding of the outer jacket layer 700, excess molten material can enter the through hole 110 of the terminal block body 100 through the through opening 230, and then flow out from the through hole 110. Dispersed injection pressure prevents excessive pressure from deforming the terminal block or causing the mounting body 300 to separate from the enameled resistance wire 400, resulting in poor contact. At the same time, the molten material enters and fills the through hole 110, and after cooling, it can provide support for the cylindrical terminal block body 100, preventing the terminal block body 100 from being flattened during use. Since the support body 200 needs to be provided with an opening 230, the opening 230 will reduce the structural strength of the support body 200. If the structural strength is too low, the injection pressure will bend the support body 200 during the injection molding of the outer layer 700. Therefore, the double support wall design effectively improves the structural strength of the support body 200 and prevents the support body 200 from being bent.

[0045] The working principle of an anti-electrofusion welding circuit breaker electrofusion pipe fitting in this embodiment is as follows:

[0046] In the injection molding of the electrofusion fitting, the inner sleeve layer 500 is first injection molded during the first injection. Then, a robotic arm performs a winding operation. The enameled resistance wire 400 is inserted into the guide groove 640 on one side of the terminal base 600, wound several times, and then exits from the guide groove 640 on the other side of the terminal base 600, completing the winding. At this time, the robotic arm removes the terminal from the guide groove 640. The first serrated part 311 and the second serrated part 312 on both sides of the terminal tooth groove 310 protect the plastic of the enameled resistance wire 400. The layer is scraped off, and then the enameled resistance wire 400 is pulled tight from the guide grooves 640 on both sides, so that the first serrated part 311 and the second serrated part 312 bite the enameled resistance wire 400, completing the assembly of the terminal block. Then, a second injection molding is performed. During the second injection molding, the assembled workpiece is placed into the mold, and molten plastic is injected through the feed port on the mold. The molten plastic fills the cavity, and the excess molten plastic can enter the through hole 110 through the through hole 230 to fill the through hole 110 or flow out from the through hole 110 to disperse the injection pressure.

[0047] The beneficial effects of this embodiment are as follows: the guide groove 640 can provide positioning points for the robot arm to wind the wire, ensuring that the position of the enameled resistance wire 400 entering and exiting the wire is the same each time, which effectively improves the winding efficiency and winding effect. The design of the through hole 110 and the through opening 230 can allow excess molten plastic to flow out, thereby dispersing the injection pressure and avoiding excessive pressure that may deform the terminal or cause the mounting body 300 and the enameled resistance wire 400 to separate and cause poor contact.

[0048] Example 3

[0049] This embodiment is a second embodiment of an electrofusion pipe fitting designed to prevent electrofusion welding circuit breakers, such as... Figure 7 and 9 As shown, the difference from Example 2 is as follows:

[0050] Specifically, it also includes an anti-overflow ring 800. A shoulder 120 is provided on the shaft section of the terminal body 100 near the support 200. The anti-overflow ring 800 includes a baffle portion 810 and a retainer 820 fixedly connected to each other. The anti-overflow ring 800 is fitted onto the terminal, with the shoulder 120 abutting against the baffle portion 810, and the retainer 820 abutting against the outer layer 700 during installation. To ensure welding quality and stability, the connector of the electrofusion welding machine and the terminal body 100 need sufficient contact area to avoid excessive contact resistance after power is applied. Therefore, an anti-overflow ring 800 is installed on the terminal body 100 to prevent burrs from forming during the injection molding process from covering the terminal, which would reduce the contact area and cause excessive contact resistance during conductive connection. After the mounting body 300 is inserted into the mounting cavity 630, the baffle part 810 of the anti-overflow ring 800 has an annular contact area with the outer surface of the outer jacket 700. When the hot melted plastic expands and overflows, the annular area can press down the overflow surface, while preventing a small amount of overflowed plastic from moving axially and forming burrs that directly contact the terminal body 100.

[0051] Specifically, it also includes a temperature sensor 900. One end of the temperature sensor 900 is mounted on the outer wall of the outer layer 700, and the other end passes through the outer layer 700 and abuts against a portion of the inner layer 500 that is wrapped with enameled resistance wire 400. The temperature sensor 900 uses RFID wireless identification technology. A passive tag is attached to the outer surface of the outer layer 700, and the sensor is set on the inner layer 500. The RFID chip binds the temperature data with the tag ID and stores it in memory. The tag supports dynamic temperature value updates. The tag modulates the temperature data into a radio frequency signal through an antenna and returns it to the reader when it is read. The reader uploads the received temperature data to the background system for real-time monitoring, alarm, or recording and analysis. The temperature monitoring process does not require wiring and supports remote, multi-point temperature monitoring.

[0052] The working principle of an anti-electrofusion welding circuit breaker electrofusion pipe fitting in this embodiment is as follows:

[0053] During the second injection molding process, after the terminal block mounting body 300 is inserted into the mounting cavity 630 of the terminal base 600, the annular contact surface between the baffle portion 810 of the anti-overflow ring 800 and the outer surface of the outer jacket 700 can increase the area and reduce the pressure of injection molding thermal stress, thereby reducing the expansion and overflow of hot melt plastic. Even if a small amount overflows, the hot melt plastic will only stay on the baffle portion 810 and is unlikely to form a burr that contacts the terminal block body 100. During hot melt welding, RFID temperature sensing technology is used to monitor the temperature of the hot melt zone in real time, and the received temperature data is uploaded to the background system for real-time analysis and alarm.

[0054] The beneficial effects of this embodiment are: the anti-overflow ring 800 effectively improves the quality of the workpiece in the second injection molding, while the RFID-type temperature sensor 900 can effectively improve the welding effect of electrofusion welding.

[0055] In the specific implementation of the above embodiments, the technical features can be combined in any non-contradictory way. For the sake of brevity, not all possible combinations of the above technical features are described. However, as long as the combination of these technical features is not contradictory, it should be considered to be within the scope of this specification.

[0056] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating this utility model, and are not intended to limit the implementation of this utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. An electrically fused soldered disconnect terminal comprising a post body (100), characterized in that, The lower end of the terminal block body (100) is provided with a toothed groove (310). The two sides of the toothed groove (310) are respectively provided with a plurality of first serrated portions (311) and a plurality of second serrated portions (312). The first serrated portions (311) and the second serrated portions (312) are used to jointly clamp and press one end of the enameled resistance wire (400).

2. An anti-electric-welding fuse terminal according to claim 1, wherein It also includes a support (200) and a mounting body (300), wherein the mounting body (300) and the terminal block body (100) are located at opposite ends of the support (200), and the toothed groove (310) is located on the mounting body (300).

3. An anti-electric-welding fuse terminal according to claim 2, wherein The first serrated portion (311) and the second serrated portion (312) are arranged alternately.

4. A type of electrofusion welding circuit breaker electrofusion fitting, comprising an enameled resistance wire (400), an inner sheath (500), an outer sheath (700), and a terminal base (600), wherein the outer sheath (700) covers the inner sheath (500), and the terminal base (600) penetrates the outer sheath (700) and is fixedly connected to the base of the inner sheath (500), characterized in that, It also includes a non-electrofusion welding circuit breaker terminal as described in claim 3, wherein the enameled resistance wire (400) is wrapped around the outer wall of the inner sleeve layer (500), and the mounting body (300) is installed inside the terminal base (600).

5. An electrically fused pipe coupling of the type which is resistant to electrically fused weld breakage as set forth in claim 4 wherein, The wiring base (600) is provided with a mounting cavity (630), and the mounting body (300) is inserted into the mounting cavity (630).

6. An electrically fused pipe coupling of the type which is resistant to electrically fused weld breakage as set forth in claim 5 wherein, The wiring base (600) has guide grooves (640) on its two opposite side walls.

7. An electrically fused pipe coupling of the type which is resistant to electrically fused weld breakage as set forth in claim 6 wherein, The guide groove (640) includes a flared portion (641) and a constricted portion (642). The flared portion (641) is located at the top of the constricted portion (642), and the inner wall surface of the flared portion (641) is an inclined surface with the top end sloping outward.

8. An electrically fused pipe coupling of the type which is resistant to electrically fused weld breakage as defined in claim 6 wherein, The main body (100) of the terminal block is provided with a through hole (110). The support body (200) further includes a first support wall (210) and a second support wall (220). The first support wall (210) and the second support wall (220) form a through opening (230). The through hole (110) communicates with the through opening (230). After the mounting body (300) is inserted into the mounting cavity (630), the guide groove (640) communicates with the through hole (110). Both ends of the first support wall (210) and the second support wall (220) are respectively fixedly connected to the main body (100) of the terminal block and the mounting body (300).

9. An electrically fused pipe coupling of the type which is prevented from electrically fusing by the provision of a fusible element, as claimed in claim 6, wherein, It also includes an anti-overflow ring (800). The terminal body (100) has a shoulder (120) on the shaft section near the support (200). The anti-overflow ring (800) includes a baffle (810) and a retainer (820) that are fixedly connected to each other. The anti-overflow ring (800) is fitted onto the terminal. The shoulder (120) abuts against the baffle (810). The retainer (820) abuts against the outer layer (700) during installation.

10. A type of electrofusion pipe fitting for preventing electrofusion welding circuit breakers according to any one of claims 4-9, characterized in that, It also includes a temperature sensor (900), one end of which is mounted on the outer wall of the outer jacket (700), and the other end passes through the outer jacket (700) and abuts against a portion of the inner jacket (500) which is wrapped with the enameled resistance wire (400).

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