Deep-well pump cable sealing structure

Abstract

The utility model provides a cable sealing structure of a deep-well pump, and belongs to the technical field of water pumps. The deep-well pump comprises an upper end cover, a wire outlet hole vertically penetrates through the upper end cover, the sealing structure comprises a positioning column vertically arranged in the wire outlet hole, the positioning column is fixedly connected with the upper end cover in a sealing mode, the upper end of the positioning column extends out of the wire outlet hole, and the upper end of the positioning column is a barrel-shaped installation portion. The lower end of the cable is inserted into the mounting part, a receding hole vertically penetrates through the bottom wall of the mounting part, and one outgoing line of the cable penetrates through the receding hole; epoxy resin is encapsulated in the mounting part, and the lower end of the cable and the mounting part form a whole under the action of the epoxy resin. The deep-well pump cable sealing structure can prevent the cable from being separated from the motor.

Description

Technical Field

[0001] The utility model belongs to the technical field of water pumps and relates to a deep well pump, in particular to a cable sealing structure for a deep well pump. Background Art

[0002] A deep well pump is a water-lifting machine that is submerged in water and is directly connected to a motor and a water pump. It is suitable for extracting groundwater from deep wells, and can also be used in water-lifting projects such as rivers, reservoirs, and canals. It is mainly used for farmland irrigation and water for humans and livestock in plateau mountainous areas, and can also be used for water supply and drainage in cities, factories, railways, mines, and construction sites.

[0003] The motor is an important component of the deep well pump. Its structure is as shown in a motor part of a deep well pump disclosed in the China Patent Library (application number: 201520021303.1), which includes a motor shaft, a cable, a motor housing, a rotor and a stator coil arranged outside the rotor. The cable extends into the motor housing and is connected to the stator coil. The stator coil has a stator wire head connected to the cable wire head of the cable. An insulating and sealed sealing ring sleeve is provided at the connection between the stator wire head and the cable wire head. The sealing ring sleeve is horizontally sleeved on the motor shaft and is filled with insulating silicone. An oil cylinder is also provided in the motor housing and the oil cylinder is located on the upper part of the sealing ring sleeve. The cable passes through the inside of the oil cylinder and is connected to the stator coil. A clamping sleeve and a clamping nut are provided between the cable and the oil cylinder, and the end of the clamping nut abuts against the clamping sleeve.

[0004] The motor part squeezes the sheath by the compression nut to deform it and hold the cable tightly for sealing. However, the force of holding the cable in this way is not very strong. When a large external force is applied, the cable will be pulled to move and separate from the motor coil, affecting the normal operation of the deep well pump. Utility Model Content

[0005] The utility model aims to solve the above problems in the prior art and proposes a deep well pump cable sealing structure which can prevent the cable from being separated from the motor.

[0006] The purpose of the utility model can be achieved through the following technical solutions: a deep well pump cable sealing structure, the deep well pump includes an upper end cover, a wire outlet hole is vertically penetrated on the upper end cover, the sealing structure includes a positioning column vertically arranged in the wire outlet hole, and the positioning column is sealed and fixedly connected to the upper end cover, characterized in that the upper end of the positioning column extends out of the wire outlet hole, and the upper end of the positioning column is a barrel-shaped mounting portion; the lower end of the cable is inserted into the mounting portion, a clearance hole is vertically penetrated on the bottom wall of the mounting portion, and one of the lead wires of the cable is arranged through the clearance hole; epoxy resin is poured in the mounting portion, and under the action of the epoxy resin, the lower end of the cable and the mounting portion are formed into a whole.

[0007] Potting epoxy resin inside the installation part can not only seal the inner cavity of the installation part to form a reliable seal between the cable and the installation part, but also integrate the cable and the installation part into a whole, so as to stably and firmly position the cable, effectively prevent the cable from being pulled by external forces and separated from the motor winding, and ensure the stable operation of the deep well pump.

[0008] In the above-mentioned deep well pump cable sealing structure, the above-mentioned positioning post includes a column vertically arranged in the wire outlet hole and a cylinder sleeved and fixed on the column. The column is hermetically connected to the lower end cover, and the installation part is formed between the top surface of the column and the cylinder. The above-mentioned relief hole is arranged on the column. The positioning post adopts a split structure composed of a column and a cylinder, which has the advantages of convenient design and processing.

[0009] In the above-mentioned deep well pump cable sealing structure, the lower end of the cylinder is screwed to the outside of the upper end of the column, which is convenient for connecting the cylinder and the column.

[0010] In the above-mentioned deep well pump cable sealing structure, a ring-shaped limit seat is formed on the outer wall of the upper end of the column, and the limit seat is coaxially arranged with the column. The above-mentioned cylinder is pressed against the top surface of the limit seat. The setting of the limit seat is used for the installation limit of the cylinder, so that the cylinder can be installed in place at one time, which is convenient for assembly.

[0011] In the above-mentioned deep well pump cable sealing structure, an annular step is provided on the inner wall of the upper end of the wire outlet hole, and the above-mentioned limit seat is pressed against the bottom surface of the annular step. The limit seat is also used for the installation limit of the column and the cylinder, with the effect of dual-purpose, so as to simplify the structure and facilitate assembly.

[0012] In the above-mentioned deep well pump cable sealing structure, a ring-shaped convex head is formed on the inner wall of the cylinder, and the convex head is coaxially arranged with the cylinder. The setting of the convex head can strengthen the axial limit strength formed between the epoxy resin and the cylinder, making the connection between the epoxy resin and the cylinder more stable and reliable.

[0013] In the above-mentioned deep well pump cable sealing structure, the outer side wall of the cylinder is recessed inward to form the above-mentioned convex head, so as to reduce material input and cost.

[0014] In the above-mentioned deep well pump cable sealing structure, the axial section of the convex head is arc-shaped, so as to reduce the blockage of the convex head and make the epoxy resin flow smoothly and evenly fill the cylinder.

[0015] In the above-mentioned deep well pump cable sealing structure, a convex column is formed on the top surface of the column, and the axes of the convex column and the column are parallel to each other. During actual processing, the convex column is buried in the epoxy resin to strengthen the connection strength and stability between the cylinder and the column.

[0016] In the above deep well pump cable sealing structure, a ring-shaped sealing portion is formed on the inner wall at the lower end of the relief hole, and the inner side wall of the sealing portion is attached to the outer side wall of the lead wire, preventing the epoxy resin from flowing out of the positioning post when the epoxy resin is potted, and ensuring the stable progress of the processing and assembly process.

[0017] Compared with the prior art, the deep well pump cable sealing structure of the present invention has the following advantages:

[0018] 1. Potting epoxy resin in the installation part can not only seal the inner cavity of the installation part to form a reliable seal between the cable and the installation part, but also integrate the cable and the installation part to stably and firmly position the cable, effectively preventing the cable from being pulled by external forces and separated from the motor wire package, and ensuring the stable operation of the deep well pump.

[0019] 2. During actual processing, the convex post is buried in the epoxy resin to enhance the connection strength and stability between the cylinder body and the column body. Description of the Drawings

[0020] Figure 1 is a schematic diagram of the deep well pump cable sealing structure.

[0021] Figure 2 is a schematic diagram of the positioning post structure.

[0022] In the figure, 1. upper end cover; 1a. wire outlet hole; 1a1. annular step; 2. positioning post; 2a. column body; 2a1. limit seat; 2a2. convex post; 2a3. relief hole; 2a4. sealing portion; 2b. cylinder body; 2b1. convex head; 3. cable; 3a. lead wire; 4. epoxy resin. Detailed Embodiments

[0023] The following are specific embodiments of the present invention and in combination with the drawings, the technical solutions of the present invention will be further described, but the present invention is not limited to these embodiments.

[0024] As Figure 1 shown, in the deep well pump cable sealing structure, the deep well pump includes an upper end cover 1, and a wire outlet hole 1a vertically penetrates through the upper end cover 1. The sealing structure includes a positioning post 2 vertically arranged in the wire outlet hole 1a, and the positioning post 2 is hermetically fixed to the upper end cover 1.

[0025] Among them,

[0026] As Figure 1 and Figure 2As shown in the figure, the upper end of the positioning post 2 extends out of the wire outlet hole 1a, and the upper end of the positioning post 2 is an installation part in the shape of a barrel, with the upper end of the installation part being open. The lower end of the cable 3 is inserted into the installation part, and a relief hole 2a3 is vertically penetrated through the bottom wall of the installation part, and one of the lead wires 3a of the cable 3 passes through the relief hole 2a3. Epoxy resin 4 is potted in the installation part, and under the action of the epoxy resin 4, the lower end of the cable 3 and the installation part form an integral body.

[0027] Potting epoxy resin 4 in the installation part can not only seal the inner cavity of the installation part to form a reliable seal between the cable 3 and the installation part, but also make the cable 3 and the installation part form an integral body to stably and firmly position the cable 3, effectively preventing the cable 3 from being separated from the motor wire package due to external pulling force and ensuring the stable operation of the deep well pump.

[0028] In this embodiment,

[0029] The positioning post 2 is of a split structure, which includes a column body 2a vertically arranged in the wire outlet hole 1a and a cylinder body 2b sleeved and fixed on the column body 2a. The column body 2a is hermetically and fixedly connected to the lower end cover, and the installation part as described above is formed between the top surface of the column body 2a and the cylinder body 2b. The relief hole 2a3 is arranged on the column body 2a. The positioning post 2 adopting the split structure composed of the column body 2a and the cylinder body 2b has the advantages of convenient design and processing.

[0030] Among them,

[0031] The column body 2a and the lower end cover are adhesively and hermetically fixedly connected.

[0032] As Figure 1 shown, the lower end of the cylinder body 2b is screwed onto the upper end of the column body 2a, which is convenient for connecting the cylinder body 2b and the column body 2a. Further explanation, an annular limit seat 2a1 is formed on the outer wall of the upper end of the column body 2a, and the limit seat 2a1 is coaxially arranged with the column body 2a. The cylinder body 2b is pressed against the top surface of the limit seat 2a1. The setting of the limit seat 2a1 is used for installing and limiting the cylinder body 2b, so that the cylinder body 2b can be installed in place at one time, which is convenient for assembly. An annular step 1a1 is provided on the inner wall of the upper end of the wire outlet hole 1a, and the limit seat 2a1 is pressed against the bottom surface of the annular step 1a1. The limit seat 2a1 is also used for installing and limiting the column body 2a and the cylinder body 2b, with the effect of dual-purpose, so as to simplify the structure and facilitate assembly.

[0033] A convex column 2a2 is integrally formed on the top surface of the column body 2a, and the convex column 2a2 and the column body 2a are arranged parallel to each other in axis. Preferably, the convex column 2a2 and the column body 2a are coaxially arranged. During actual processing, the convex column 2a2 is buried in the epoxy resin 4 to enhance the connection strength and stability between the cylinder body 2b and the column body 2a.

[0034] As Figure 1 and Figure 2As shown, a ring-shaped boss 2b1 is formed on the inner wall of the cylinder body 2b, and the boss 2b1 is coaxially arranged with the cylinder body 2b. By setting the boss 2b1, the axial limiting strength formed between the epoxy resin 4 and the cylinder body 2b can be enhanced, making the connection between the epoxy resin 4 and the cylinder body 2b more stable and reliable. Preferably, there are two bosses 2b1 which are axially distributed along the positioning post 2 to strengthen the bonding strength between the cylinder body 2b and the epoxy resin 4.

[0035] Further explanation, the outer wall of the cylinder body 2b is recessed inward to form the above-mentioned boss 2b1, so as to reduce the material input and lower the cost. The axial cross-section of the boss 2b1 is arc-shaped to reduce the blockage of the boss 2b1 and enable the epoxy resin 4 to flow smoothly and uniformly fill the cylinder body 2b.

[0036] In the actual product, the inner wall of the upper end of the lead wire 3a is a conical surface with a diameter gradually decreasing from top to bottom; a ring-shaped sealing portion 2a4 is integrally formed on the inner wall of the lower end of the relief hole 2a3, and the inner side wall of the sealing portion 2a4 is attached to the outer side wall of the lead wire 3a to prevent the epoxy resin 4 from flowing out of the positioning post 2 when the epoxy resin 4 is potted, ensuring the stable progress of the processing and assembly process.

[0037] The specific embodiments described herein are merely illustrative of the spirit of the present utility model. Those skilled in the art of the present utility model can make various modifications or supplements to the described specific embodiments or use similar ways to replace them, but will not deviate from the spirit of the present utility model or exceed the scope defined by the appended claims.

Claims

1. A cable sealing structure for a deep well pump. The deep well pump includes an upper end cover (1), and a wire outlet hole (1a) vertically penetrates through the upper end cover (1). This sealing structure includes a positioning column (2) vertically arranged in the wire outlet hole (1a), and the positioning column (2) is hermetically and fixedly connected to the upper end cover (1). It is characterized in that, The upper end of the positioning post (2) extends out of the wire outlet hole (1a), and the upper end of the positioning post (2) is an installation part in the shape of a barrel; the lower end of the cable (3) is inserted into the installation part, and a relief hole (2a3) is vertically penetrated through the bottom wall of the installation part, and one of the lead wires (3a) of the cable (3) passes through the relief hole (2a3); epoxy resin (4) is potted in the installation part, and under the action of the epoxy resin (4), the lower end of the cable (3) and the installation part form an integral body.

2. The cable sealing structure of the deep well pump according to claim 1, wherein The above-mentioned positioning post (2) includes a column body (2a) vertically arranged in the wire outlet hole (1a) and a cylinder body (2b) sleeved and fixed on the column body (2a). The column body (2a) is hermetically and fixedly connected to the lower end cover, and the installation part as described above is formed between the top surface of the column body (2a) and the cylinder body (2b). The above-mentioned relief hole (2a3) is arranged on the column body (2a).

3. The cable sealing structure of the deep well pump according to claim 2, characterized in that, The lower end of the cylinder body (2b) is screwed on the outer side of the upper end of the column body (2a).

4. The cable sealing structure of the deep well pump according to claim 3, wherein, An annular limit seat (2a1) is formed on the outer wall of the upper end of the column body (2a), and the limit seat (2a1) is coaxially arranged with the column body (2a). The above-mentioned cylinder body (2b) is pressed against the top surface of the limit seat (2a1).

5. The deep well pump cable sealing structure according to claim 4, characterized in that, An annular step (1a1) is formed on the inner wall of the upper end of the wire outlet hole (1a), and the above-mentioned limit seat (2a1) is pressed against the bottom surface of the annular step (1a1).

6. The cable sealing structure of the deep well pump according to claim 2, characterized in that An annular convex head (2b1) is formed on the inner wall of the cylinder body (2b), and the convex head (2b1) is coaxially arranged with the cylinder body (2b).

7. The cable sealing structure of the deep well pump according to claim 6, characterized in that, The outer side wall of the cylinder body (2b) is recessed inward to form the above-mentioned convex head (2b1).

8. The deep well pump cable sealing structure according to claim 6 or 7, characterized in that The axial cross-section of the convex head (2b1) is arc-shaped.

9. The deep well pump cable sealing structure according to claim 2, characterized in that, A convex column (2a2) is formed on the top surface of the column body (2a), and the axis of the convex column (2a2) is parallel to the axis of the column body (2a).

10. The cable sealing structure of the deep well pump according to claim 1, characterized in that, An annular sealing part (2a4) is formed on the inner wall of the lower end of the relief hole (2a3), and the inner side wall of the sealing part (2a4) is attached to the outer side wall of the lead wire (3a).

Images