Self-locking cable conductor connecting structure

Abstract

The utility model discloses a self-locking cable conductor connecting structure, relates to the technical field of immersed pump cable connection, and particularly relates to a self-locking cable conductor connecting structure. The device comprises a motor end wiring terminal, a locking connecting pipe, an external cable end wiring terminal and an insulating sleeve. The external cable end wiring terminal is arranged in the locking connecting pipe and is connected with an external power cable; the motor end wiring terminal is connected with a motor end cable, and is connected with an external cable end wiring terminal after being assembled in a matched manner through a locking connecting pipe; and the insulating sleeve and the locking connecting pipe are matched and sleeved outside the motor end wiring terminal, the locking connecting pipe and the external cable end wiring terminal. According to the technical scheme, the problems that in the prior art, due to the fact that the internal space of a metal hose is limited, a wire and a connecting structure cannot be fixed through bolts and nuts, meanwhile, installation and maintenance time is long, and corrosive media hurt the human body are solved.

Description

TECHNICAL FIELD

[0001] The utility model discloses a self -locking cable conductor connecting structure relates to submerged pump cable connection technical field, and especially relates to a self -locking cable conductor connecting structure. BACKGROUND

[0002] At present, the submerged pump conveying corrosive medium is placed in the pump well, and is surrounded by corrosive medium. Since the medium is corrosive, it is easy to react chemically with copper. Therefore, the metal hose is arranged outside the motor lead wire and external power cable to isolate the corrosive medium. Inert gas is used for positive pressure protection inside to further isolate the corrosive medium in the pump well, so as to meet the use requirements of the conductor in the corrosive medium. Since the internal space of the metal hose is limited, the bolt and nut cannot be used to fix the lead wire and the connecting structure. At the same time, since there is medium in the storage tank during maintenance, the corrosive medium can be leaked into the atmosphere through the pipeline in a small amount. Therefore, it is necessary to shorten the installation time of maintenance and eliminate the danger of long-term work.

[0003] In view of the problems existing in the prior art, it is necessary to design a new self -locking cable conductor connecting structure to overcome the problems existing in the prior art. SUMMARY

[0004] According to the above-mentioned technical problems of the prior art that the internal space of the metal hose is limited and the bolt and nut cannot be used to fix the lead wire and the connecting structure, and the long installation and maintenance time causes the harm of corrosive medium to human body, a self -locking cable conductor connecting structure is provided. The utility model mainly utilizes the self -locking mechanism composed of the motor terminal, the locking connecting pipe and the external cable terminal. Without using fasteners, the electrode lead wire and the external power cable can be connected and locked, so as to realize the transmission of electric power. Conversely, when the motor transmission needs to be disconnected, the self -locking mechanism only needs to be disassembled to realize the separation of the two conductors.

[0005] The technical means adopted by the utility model are as follows:

[0006] A self -locking cable conductor connecting structure comprises a motor terminal, a locking connecting pipe, an external cable terminal and an insulating sleeve.

[0007] Further, the external cable terminal is arranged in the internal part of the locking connecting pipe and connected with the external power cable.

[0008] Further, the motor terminal is connected with the motor end cable, and connected with the external cable terminal after being assembled with the locking connecting pipe.

[0009] Further, the insulating sleeve is sleeved with the motor terminal, the locking connecting pipe and the external cable terminal outside the locking connecting pipe.

[0010] Furthermore, the tail end of the motor end terminal is provided with a cable connection hole for connecting to the motor end cable;

[0011] Furthermore, the front end of the motor terminal is machined with an outer conical surface.

[0012] Furthermore, the outer wall of the motor end terminal head is machined with external threads.

[0013] Furthermore, the tail end of the external cable terminal block is provided with a cable connection hole for connecting to an external power cable;

[0014] Furthermore, the front end of the external cable terminal is machined with an inner conical surface that matches the outer conical surface of the front end of the motor terminal.

[0015] Furthermore, the locking connecting tube is a tubular structure with an inner ring platform machined at one end, which is used to fit with the head of the external cable terminal block to limit the position of the external cable terminal block;

[0016] Furthermore, the inner wall of the locking connecting tube is machined with an internal thread that mates with the external thread of the motor end terminal, for connecting and locking the motor end terminal, so that the motor end terminal is connected to the external cable end terminal.

[0017] Furthermore, the outer wall of the locking connecting pipe is machined with external threads.

[0018] Furthermore, the insulating sleeve is a tubular structure made of PTFE or epoxy phenolic glass cloth, with an internal thread on its inner wall that matches the external thread on the outer wall of the locking connecting tube, and is fitted onto the outside of the locking connecting tube.

[0019] Furthermore, the length of the insulating sleeve is greater than the combined length of the motor end terminals, locking connecting tube, and external cable end terminals, thus providing insulation for the connection structure.

[0020] Furthermore, the submersible pump, which transports corrosive media, is placed inside a pump well surrounded by the corrosive medium. Because the medium is corrosive and readily reacts with copper, a flexible metal hose is installed around the motor wiring and external power cable to isolate them from the corrosive medium. Internally, positive pressure protection with inert gas further isolates them from the corrosive medium in the pump well, meeting the requirements for conductor operation under corrosive conditions. Due to the limited internal space of the flexible metal hose, this technology allows the connection and sealing of the motor wiring and external power cable within the hose without the use of bolts, nuts, or other fasteners. During maintenance, because the storage tank contains the medium, corrosive media can leak in small amounts into the atmosphere through the pipeline; therefore, it is crucial to shorten the installation time for maintenance and eliminate the danger of prolonged worker operation. This structural technology enables rapid installation and disassembly of the submersible pump motor wiring and external power cable, shortening installation time and improving the safety of maintenance.

[0021] The wiring and installation process of this utility model is as follows:

[0022] Before wiring, insert the locking connector and insulating sleeve into the external power cable, and then crimp the wires of the external power cable into the wiring holes of the external cable terminal block. Thread the motor-end cable wires into the wiring holes of the motor-end terminal block. The wiring of the motor-end cable and the external power cable is now complete.

[0023] During on-site installation, the motor-end terminals with completed wiring must be matched with the external cable-end terminals. Then, push the locking connector already inserted into the external power cable to the motor conductor end, and tighten the motor-end terminals and external cable-end terminals together using threads. This step completes the cable conductor connection self-locking, fixing the motor-end terminals, locking connector, and external cable-end terminals together and establishing cable connectivity. After tightening the external cable-end terminals, push the insulating sleeve already inserted into the external power cable to the conductor connection point and tighten it with the external threads of the locking connector. Seal the insulating sleeve with heat-shrink tubing and insulating tape to achieve cable insulation.

[0024] Compared with the prior art, the present invention has the following advantages:

[0025] 1. The self-locking cable conductor connection structure provided by this utility model solves the problem of rapid installation and disassembly between the motor wire of the cryogenic submersible pump that transports corrosive media and the external power supply cable, and prevents the conductor from being corroded in a narrow space.

[0026] 2. The self-locking cable conductor connection structure provided by this utility model enables the rapid installation and disassembly of the submersible pump motor wire and the external power cable, shortening the installation time and improving the safety of inspection and maintenance.

[0027] 3. The self-locking cable conductor connection structure provided by this utility model eliminates the need for fasteners such as bolts and nuts, thus eliminating the risk caused by loose fasteners;

[0028] 4. The self-locking cable conductor connection structure provided by this utility model simplifies the operation steps by eliminating the need for tools such as torque wrenches, and enables rapid installation and disassembly of cable conductors.

[0029] In summary, the technical solution of this utility model solves the problems of limited internal space in existing metal hoses, which prevent the use of bolts and nuts to fix wires and connecting structures, long installation and maintenance times, and the resulting harm to the human body from corrosive media. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of this utility model 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 utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1 This is a schematic diagram of the structure of this utility model;

[0032] Figure 2 This is a wiring diagram of the present invention;

[0033] Figure 3 This is a schematic diagram of the complete assembly of this utility model.

[0034] In the diagram: 1. Motor end terminal; 2. Locking connection tube; 3. External cable end terminal; 4. Insulating sleeve. Detailed Implementation

[0035] It should be noted that, where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other. The present utility model will now be described in detail with reference to the accompanying drawings and embodiments.

[0036] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit this utility model or its application or use. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0037] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to the present invention. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0038] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0039] In the description of this utility model, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is usually based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this utility model and simplifying the description. Unless otherwise stated, these directional terms 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, and therefore should not be construed as a limitation on the scope of protection of this utility model. The directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0040] For ease of description, spatial relative terms such as "above," "over," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation besides the orientation of the device as described in the figures. For example, if the device in the figures is inverted, a device described as "above" or "above" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0041] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this utility model.

[0042] As shown in the figure, this utility model provides a self-locking cable conductor connection structure including: a motor end terminal 1, a locking connecting tube 2, an external cable end terminal 3, and an insulating sleeve 4; the external cable end terminal 3 is installed inside the locking connecting tube 2 and connected to the external power cable; the motor end terminal 1 is connected to the motor end cable, and after being assembled with the locking connecting tube 2, it is connected to the external cable end terminal 3; the insulating sleeve 4 is fitted around the motor end terminal 1, the locking connecting tube 2, and the external cable end terminal 3.

[0043] The motor-end terminal 1 has a cable connection hole at its tail end for connecting to the motor-end cable; the front end of the motor-end terminal 1 has an external conical surface machined on its head. External threads are machined on the outer wall of the head of the motor-end terminal 1.

[0044] The tail end of the external cable terminal 3 is provided with a cable connection hole for connecting to an external power cable; the front end of the head of the external cable terminal 3 is machined with an inner conical surface that matches the outer conical surface of the front end of the head of the motor terminal 1.

[0045] The locking connecting tube 2 is a tubular structure with an inner ring platform machined at one end for engaging with the head of the external cable terminal 3 to limit its movement. The inner wall of the locking connecting tube 2 has an internal thread that mates with the external thread of the motor terminal 1, used to connect and lock the motor terminal 1 to the external cable terminal 3. The outer wall of the locking connecting tube 2 has an external thread.

[0046] The insulating sleeve 4 is a tubular structure made of PTFE or epoxy phenolic glass cloth. Its inner wall is machined with an internal thread that matches the external thread on the outer wall of the locking connecting tube 2. It is fitted onto the outside of the locking connecting tube 2. The length of the insulating sleeve 4 is greater than the assembled length of the motor end terminal 1, the locking connecting tube 2, and the external cable end terminal 3, thus providing insulation for the connection structure.

[0047] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model 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 embodiments of this utility model.

Claims

1. A self-locking cable conductor connecting structure, characterized in that: the self-locking cable conductor connecting structure comprises a motor terminal (1), a locking connecting pipe (2), an external cable terminal (3) and an insulating sleeve (4); the external cable terminal (3) is arranged in the locking connecting pipe (2) and connected with an external power cable; the motor terminal (1) is connected with a motor cable and connected with the external cable terminal (3) after being assembled with the locking connecting pipe (2); and the insulating sleeve (4) is arranged outside the motor terminal (1), the locking connecting pipe (2) and the external cable terminal (3).

2. The self-locking cable conductor connecting structure according to claim 1, characterized in that: the tail end of the motor terminal (1) is provided with a cable connecting hole for connecting with the motor cable; and the head of the motor terminal (1) is provided with an outer taper surface.

3. The self-locking cable conductor connecting structure according to claim 1, characterized in that: the head of the motor terminal (1) is provided with an outer thread.

4. The self-locking cable conductor connecting structure according to claim 1, characterized in that: the tail end of the external cable terminal (3) is provided with a cable connecting hole for connecting with the external power cable; and the head of the external cable terminal (3) is provided with an inner taper surface matched with the outer taper surface of the head of the motor terminal (1).

5. The self-locking cable conductor connecting structure according to claim 1, characterized in that: the locking connecting pipe (2) is a tubular structure, one end of which is provided with an inner ring table for limiting the external cable terminal (3) through cooperation with the head of the external cable terminal (3); and the inner wall of the locking connecting pipe (2) is provided with an inner thread matched with the outer thread of the motor terminal (1) for connecting and locking the motor terminal (1) so that the motor terminal (1) is connected with the external cable terminal (3).

6. The self-locking cable conductor connecting structure according to claim 1, characterized in that: the outer wall of the locking connecting pipe (2) is provided with an outer thread.

7. The self-locking cable conductor connecting structure according to claim 1, characterized in that: the insulating sleeve (4) is a tubular structure made of PTFE, epoxy phenolic glass cloth or the like, and the inner wall of the insulating sleeve (4) is provided with an inner thread matched with the outer thread of the locking connecting pipe (2) for being arranged outside the locking connecting pipe (2).

8. The self-locking cable conductor connecting structure according to claim 1, characterized in that: the length of the insulating sleeve (4) is greater than the length of the motor terminal (1), the locking connecting pipe (2) and the external cable terminal (3) after being assembled, and the insulating sleeve (4) plays an insulating role for the connecting structure. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​

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