Centrally-arranged connecting structure for cable of deep-well pump

Abstract

The utility model discloses a deep-well pump cable centrally-arranged connecting structure which comprises a motor assembly, an electric control assembly, a motor cylinder covering the motor assembly, an electric control cylinder covering the electric control assembly and a middle connecting body connected between the motor assembly and the electric control cylinder. The other end is located in the middle connecting body and connected to an electric control assembly input lead, and an electric control assembly output lead penetrates through the middle connecting body and is connected with a motor lead of the motor assembly; the middle connecting body is fixedly connected with the motor cylinder and the electric control cylinder through a plurality of groups of side button locking structures and comprises a connecting buckle sleeve, a screw, a first connecting hole formed in the outer side of the middle connecting body and a second connecting hole correspondingly formed in the motor cylinder or the electric control cylinder, and the connecting buckle sleeve is arranged in the two connecting holes in a sleeving manner at the same time to form transition fit; the screw penetrates through the connecting retaining ring and is screwed in the first connecting hole, and the screwed part of the screw and the first connecting hole is filled with thread glue. The structure is stable in butt joint with the motor and the electric control, convenient to disassemble and assemble, short in lead and capable of avoiding electromagnetic interference.

Description

Technical Field

[0001] This utility model relates to the field of deep well pump technology, and in particular to a central connection structure for deep well pump cables. Background Technology

[0002] Deep well pumps are pumps that are fully immersed in underground water wells to draw and transport water. They are widely used in agricultural irrigation and drainage, industrial and mining enterprises, urban water supply and drainage, and sewage treatment. In existing deep well pumps, the motor assembly and electrical control assembly are installed together in a single casing. The hydraulic cylinder and pump body are sequentially mounted on the casing near the motor assembly end. The cable is typically located at the hydraulic cylinder, passing through the stator coil of the motor assembly before connecting to the input lead of the electrical control assembly. The output lead of the electrical control assembly then connects to the motor lead of the motor assembly to achieve current transmission. Due to this integrated casing mounting structure, the installation of the motor assembly and electrical control assembly is difficult, and disassembly and maintenance are challenging. The wiring structure is susceptible to interference from the magnetic field of the stator coil, and the excessively long leads require multiple soldering operations, which has adverse effects. Utility Model Content

[0003] The technical problem to be solved by this utility model is to overcome the above-mentioned problems and provide a central connection structure for deep well pump cables, so as to realize a stable connection between the motor part and the electrical control part, improve the convenience of installation and maintenance, shorten the wiring length, and reduce electromagnetic interference.

[0004] The technical solution of this utility model is:

[0005] The present invention discloses a deep well pump cable central connection structure, comprising a motor assembly and an electrical control assembly, characterized in that: it further comprises a motor cylinder covered outside the motor assembly, an electrical control cylinder covered outside the electrical control assembly, and a central connecting body connected between the two, wherein a cable is installed on the central connecting body, one end of the cable is led outward, and the other end is located inside the central connecting body and connected to the input lead of the electrical control assembly, and the output lead of the electrical control assembly passes through the central connecting body and is connected to the motor lead of the motor assembly;

[0006] The middle connecting body is fixedly connected to the motor barrel and the electric control barrel by multiple sets of side button locking structures. The side button locking structure includes a connecting sleeve, a screw, a first connecting hole on the outer wall of the middle connecting body, and a second connecting hole on the outer wall of the motor barrel or the electric control barrel. The connecting sleeve is simultaneously fitted into the first connecting hole and the second connecting hole to form a transition fit. The screw passes through the connecting sleeve and is screwed into the first connecting hole, and the screw joint is filled with thread-locking adhesive.

[0007] This structure achieves the connection between the motor and the electronic control unit by adding a central connector with a cable. Combined with a connecting sleeve, screws, and thread-locking adhesive, it achieves a stable lateral connection, effectively ensuring that the screws do not loosen or break, and the connection is secure. It replaces the integrated housing design, simplifies the installation process, and facilitates installation and maintenance. The central connector allows the cable to be led out from the middle section, eliminating the need for the cable to exit from the hydraulic cylinder at the motor end. This avoids magnetic field interference caused by the cable passing through the motor stator coil and the adverse effects caused by excessively long lines.

[0008] Furthermore, in the deep well pump cable central connection structure described in this utility model, a insertion hole is recessed on the outer wall of the central connector, which extends into the inner cavity of the central connector, and the cable is fixedly inserted into the insertion hole.

[0009] Furthermore, in the deep well pump cable central connection structure described in this utility model, annular sealing grooves are recessed on the outer walls of both ends of the central connector, and O-rings are fitted inside the sealing grooves. The two ends of the central connector are sealed with the motor cylinder and the electric control cylinder through the O-rings, thereby improving the sealing performance of the connection.

[0010] Furthermore, in the deep well pump cable central connection structure described in this utility model, each end of the central connector is provided with two O-rings.

[0011] Furthermore, in the deep well pump cable central connection structure described in this utility model, the motor cylinder, the central connecting body, and the electrical control cylinder are arranged coaxially.

[0012] Furthermore, in the deep well pump cable central connection structure described in this utility model, the first connection hole is a stepped hole, including a large-diameter section that mates with the connecting sleeve and a small-diameter section that is threadedly connected to the screw.

[0013] Furthermore, in the deep well pump cable central connection structure described in this utility model, the outer end of the connecting sleeve is bent to form a convex edge, and the convex edge abuts against the outer wall of the motor cylinder or the electric control cylinder.

[0014] Furthermore, in the deep well pump cable central connection structure described in this utility model, the contact surface between the screw and the connecting sleeve adopts a conical surface fit to improve the connection tightness.

[0015] The beneficial effects of this utility model are:

[0016] This utility model has a simple structure and reasonable design. By adding a middle connector between the motor and the electronic control part, and using a side button locking structure composed of a connecting sleeve, screws, and threaded adhesive, the motor and electronic control part are stably connected and integrated into one, replacing the traditional one-piece structure. The installation method is simple and convenient, easy to implement, and easy to disassemble and maintain later. At the same time, the cable is placed in the middle, moving the cable from the cylinder on the motor assembly side to the middle connector, closer to the electronic control assembly side. This avoids magnetic field interference caused by the cable passing through the motor stator coil, effectively shortens the wire length, reduces the number of joint welding, and reduces the possibility of adverse factors such as poor welding, resistance difference, and current difference. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model.

[0018] Figure 2 This is a schematic diagram of the connecting body described in this utility model.

[0019] Figure 3 for Figure 1 A magnified view of a portion of the image. Detailed Implementation

[0020] The present invention will now be further described with reference to the accompanying drawings:

[0021] Reference Figure 1 , Figure 2 As shown in the figure, the deep well pump cable center connection structure described in this embodiment includes a motor assembly 1, an electrical control assembly 2, a motor cylinder 3 covering the motor assembly 1, an electrical control cylinder 4 covering the electrical control assembly 2, and a central connecting body 5 connecting the two. The motor cylinder 3, the central connecting body 5, and the electrical control cylinder 4 are arranged coaxially.

[0022] A cable 7 is installed on the intermediate connector 5. A insertion hole 6 is recessed on the outer wall of the intermediate connector 5, extending into the inner cavity of the intermediate connector 5. The cable 7 is fixedly inserted into the insertion hole 6. One end of the cable 7 extends outward, and the other end is located inside the intermediate connector 5 and connected to the input lead of the electronic control component 2. The output lead of the electronic control component 2 passes through the intermediate connector 5 and is connected to the motor lead of the motor assembly 1.

[0023] Combination Figure 1 and Figure 3The connecting body 5 is fixedly connected to the motor cylinder 1 and the electric control cylinder 2 by multiple sets of side button locking structures. Each side button locking structure includes a connecting sleeve 8, a screw 9, a first connecting hole 11 on the outer wall of the connecting body 5, and a second connecting hole 10 corresponding to the outer wall of the motor cylinder 1 or the electric control cylinder 2. The connecting sleeve 8 is fitted into both the first connecting hole 11 and the second connecting hole 10, forming a transition fit. The screw 9 passes through the connecting sleeve 8 and is screwed into the first connecting hole 11, with thread-locking adhesive filling the screw joint. The first connecting hole 11 is a stepped hole, including a large-diameter section that mates with the connecting sleeve 8 and a small-diameter section that is threaded to the screw 9. The outer end of the connecting sleeve 8 is bent to form a raised edge, which abuts against the outer wall of the motor cylinder 1 or the electric control cylinder 2. The contact surface between the screw 9 and the connecting sleeve 8 is a tapered fit.

[0024] To improve the tightness of the connection and prevent water leakage, annular sealing grooves 13 are recessed on the outer walls of both ends of the intermediate connecting body 5. O-rings 12 are fitted inside the sealing grooves 13, and the two ends of the intermediate connecting body 5 are sealed to the motor cylinder 1 and the electric control cylinder 2 by the O-rings 12. Each end of the intermediate connecting body 5 is provided with two O-rings 12.

[0025] In this embodiment, the two ends of the central connector 5 are locked by a side-button locking method using connecting sleeves 8, screws 9, and threaded adhesive. One end is connected to the motor, and the other end is connected to the electronic control unit. This method is not only secure and concentric but also convenient for installation. Furthermore, the position of the cable 7 is optimized by centrally installing it on the central connector 5, allowing it to be as close as possible to the electronic control unit 2 for connection. The cable 7 does not need to be led out from the cylinder on the motor side before connecting to the electronic control unit, and therefore will not pass through the stator coil of the motor, effectively avoiding magnetic field interference. It also effectively shortens the overall line length, reduces the number of joint welding operations, and reduces adverse factors such as poor soldering, resistance differences, and current differences.

[0026] The specific embodiments described herein are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model are still covered by the claims of this utility model.

Claims

1. A centrally located cable connection structure for a deep well pump, comprising a motor assembly and an electrical control assembly, characterized in that: It also includes a motor cylinder covering the motor assembly, an electronic control cylinder covering the electronic control assembly, and an intermediate connecting body connecting the two. A cable is installed on the intermediate connecting body, with one end of the cable leading outward and the other end located inside the intermediate connecting body and connected to the input lead of the electronic control assembly. The output lead of the electronic control assembly passes through the intermediate connecting body and is connected to the motor lead of the motor assembly. The middle connecting body is fixedly connected to the motor barrel and the electric control barrel by multiple sets of side button locking structures. The side button locking structure includes a connecting sleeve, a screw, a first connecting hole on the outer wall of the middle connecting body, and a second connecting hole on the outer wall of the motor barrel or the electric control barrel. The connecting sleeve is simultaneously fitted into the first connecting hole and the second connecting hole to form a transition fit. The screw passes through the connecting sleeve and is screwed into the first connecting hole, and the screw joint is filled with thread-locking adhesive.

2. The deep well pump cable central connection structure according to claim 1, characterized in that: A insertion hole is recessed on the outer wall of the middle connector, which extends into the inner cavity of the middle connector, and the cable is fixedly inserted into the insertion hole.

3. The deep well pump cable central connection structure according to claim 1, characterized in that: The outer walls at both ends of the middle connector are recessed with annular sealing grooves, and O-rings are fitted inside the sealing grooves. The two ends of the middle connector are sealed to the motor cylinder and the electric control cylinder by the O-rings.

4. The deep well pump cable central connection structure according to claim 1, characterized in that: Each end of the connecting body is provided with two O-rings.

5. The deep well pump cable central connection structure according to claim 1, characterized in that: The motor cylinder, the intermediate connecting body, and the electric control cylinder are arranged coaxially.

6. The deep well pump cable center-mounted connection structure according to claim 1, characterized in that: The first connecting hole is a stepped hole, including a large-diameter section that mates with the connecting sleeve and a small-diameter section that is threadedly connected to the screw.

7. The deep well pump cable center-mounted connection structure according to claim 1, characterized in that: The outer end of the connecting sleeve is bent to form a protruding edge, which abuts against the outer wall of the motor cylinder or the electric control cylinder.

8. The deep well pump cable central connection structure according to claim 1, characterized in that: The contact surfaces of the screw and the connecting sleeve are tapered.

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