A waterproof cable assembly for a deep-well pump

Abstract

The utility model relates to deep well pump design technical field discloses a waterproof cable line subassembly of deep well pump, including the connector that one end is located in deep well pump and the other end is located deep well pump outside, the connecting plate, one end with outside power supply is connected and the other end with the connector connection's first cable bus, one end with the motor connection in deep well pump and the other end with the connector connection's second cable bus, first cable bus has a plurality of first conductors in, and second cable bus includes a plurality of second conductors, the connector is provided with a plurality of copper bars for respectively docking first conductors and second conductors, the both ends of copper bar all are provided with the connecting hole that first conductor's core and second conductor's core respectively embed, and a plurality of copper bars are wrapped with insulating layer. When the surface of first cable bus breaks and the inside water enters, the water that enters can be isolated at the position of copper bar, and finally can avoid the condition that the water of outside enters the inside of motor through the broken first cable bus.

Description

Technical Field

[0001] This utility model belongs to the field of deep well pump design technology, and specifically relates to a waterproof cable assembly for a deep well pump. Background Technology

[0002] Deep well pumps are well pumping equipment that integrates the electric motor and pump body into one design. They are widely used in agricultural irrigation, industrial water supply and drainage and other fields.

[0003] Currently, Chinese patent CN220325355U, published on January 9, 2024, discloses a synchronous reluctance motor for a deep well pump, including a barrel, a bottom cover located in the lower end port of the barrel, and a hydraulic cylinder located in the upper end port of the barrel. A stator is located inside the barrel; the stator has several stator windings; a motor shaft is located at the center of the stator; a transversely stacked rotor located inside the stator is mounted on the motor shaft; an air gap exists between the outer wall of the transversely stacked rotor and the inner wall of the stator; a bearing seat is located directly below the stator inside the barrel; an insulating groove is provided on the upper surface of the bearing seat; a lower bearing hole, communicating with the insulating groove, is provided on the lower surface of the bearing seat; the diameter of the lower bearing hole is smaller than that of the insulating groove. The cylinder has a diameter; a lower bearing that matches the lower end of the motor shaft is installed in the lower bearing hole; an insulating paper that fits against the inner wall of the insulating groove is installed between the lower surface of the stator and the bottom of the insulating groove; the insulating paper is annular and encloses the part of the stator winding that protrudes from the lower surface of the stator; an upper bearing hole is installed on the lower surface of the cylinder center; a sand-proof hole that communicates with the upper bearing hole is installed at the center of the upper surface of the cylinder, and the diameter of the sand-proof hole is smaller than the diameter of the upper bearing hole; the upper end of the motor shaft passes through the upper bearing hole and the sand-proof hole in sequence from top to bottom; an upper bearing that fits against the motor shaft is installed in the upper bearing hole; a spacer that fits against the barrel is installed between the lower surface of the cylinder and the upper surface of the stator, and the spacer encloses the part of the stator winding that protrudes from the upper surface of the stator.

[0004] The cable passes through the lead hole to the outside of the barrel, so that one end of the cable is connected to the motor and the other end is used to connect to the external power supply. However, the working position of the deep well pump often needs to be in a deep water area, and the pressure of the deeper water area is relatively high. Therefore, when the surface of the cable is damaged, water often enters the motor through the gaps inside the cable, resulting in water entering the motor and affecting the operation of the motor. Utility Model Content

[0005] The purpose of this invention is to provide a waterproof cable assembly for a deep well pump, which can prevent external water from entering the motor through a damaged first cable bus.

[0006] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a waterproof cable assembly for a deep well pump, comprising a connector with one end located inside the deep well pump and the other end located outside the deep well pump, a connecting plate sleeved on the connector and used for connecting to the deep well pump, a first cable bus with one end connected to an external power source and the other end connected to the connector, and a second cable bus with one end connected to a motor inside the deep well pump and the other end connected to the connector. The first cable bus contains multiple first conductors, and the second cable bus contains multiple second conductors. The connector contains multiple copper rods for respectively connecting the first conductors and the second conductors. Both ends of the copper rods are provided with connecting holes for the cores of the first conductors and the cores of the second conductors to be inserted. An insulating layer is wrapped between the multiple copper rods.

[0007] A further feature of this invention is that the copper rod is deformed by external pressure at both ends and then pressed together with the wire core.

[0008] A further feature of this invention is that the insulating layer is made of epoxy resin.

[0009] A further feature of this invention is that the connector includes a seat located inside the deep well pump and a stainless steel sleeve connected to the seat and located outside the deep well pump.

[0010] A further feature of this invention is that an internal threaded annular groove is provided at the end of the seat sleeve, and an external threaded sleeve is provided at the end of the stainless steel sleeve, which is threadedly connected to the internal threaded annular groove.

[0011] A further feature of this invention is that the stainless steel sleeve has a constricted opening on the periphery of the end away from the seat cover, which abuts against the insulating layer.

[0012] A further feature of this invention is that a plurality of guide sleeves are provided at the end of the seat sleeve away from the stainless steel sleeve, each for a plurality of second wires to pass through. In summary, this utility model has the following beneficial effects: 1. Using multiple copper rods inside the connector, the connecting holes at both ends of the copper rods are respectively for the cores of the first conductor and the second conductor to be inserted. At this time, the copper rods can connect the first cable bus and the second cable bus. At the same time, the multiple copper rods are wrapped with an insulating layer for insulation separation, so that the motor can be powered normally. When the surface of the first cable bus is damaged and water enters, the water can be blocked at the location of the copper rods, thus preventing external water from entering the motor through the damaged first cable bus. 2. By applying external pressure to both ends of the copper rod, the copper rod is deformed and then pressed together with the wire core. At this time, an interference fit is formed between the connecting hole and the wire core, which is conducive to a stable connection between the copper rod and the wire core. 3. The insulating layer is made of epoxy resin, which has good insulation and corrosion resistance, making it well-suited for underwater environments. 4. The connector includes a seat and a stainless steel sleeve, with the stainless steel sleeve located on the outside of the deep well pump. Since stainless steel has good corrosion resistance and high structural strength, it can improve the safety of the connector when used underwater, and also helps to protect the insulation layer and copper rod inside. 5. The stainless steel sleeve is connected to the inner threaded groove of the seat sleeve by the external thread, which makes it easy and detachable to connect the stainless steel sleeve to the seat sleeve, and facilitates the quick installation and removal of the copper rod in the connector. 6. By utilizing the constricted section set on the periphery of the stainless steel sleeve away from the seat cover, which abuts against the insulation layer, the insulation layer inside can be stably restrained and wrapped by the stainless steel sleeve and the seat cover. 7. Multiple guide sleeves are installed at the end of the seat sleeve away from the stainless steel sleeve. Multiple guide sleeves can be used to allow multiple second wires to pass through, thereby guiding the second wires. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a structural cross-sectional view of the present invention; Figure 3 This is a cross-sectional view showing the connection relationship between multiple copper rods and the insulating layer in this utility model.

[0015] In the figure, 1 is the connector; 11 is the seat sleeve; 111 is the internal threaded annular groove; 112 is the guide sleeve; 12 is the stainless steel sleeve; 121 is the external threaded sleeve; 122 is the constricted part; 2 is the connecting plate; 3 is the first cable bus; 31 is the first conductor; 4 is the second cable bus; 41 is the second conductor; 5 is the copper rod; 51 is the connecting hole; and 6 is the insulation layer. Detailed Implementation

[0016] The technical solutions in the embodiments will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0017] A waterproof cable assembly for a deep well pump, as shown in the reference. Figure 1 , Figure 2 The waterproof cable assembly for this type of deep well pump includes a connector 1 with one end inside the deep well pump and the other end outside the deep well pump, a connecting plate 2 sleeved on the connector 1 and used for bolting to the deep well pump, a first cable bus 3 with one end connected to an external power source and the other end connected to the connector 1, and a second cable bus 4 with one end connected to a motor inside the deep well pump and the other end connected to the connector 1. The first cable bus 3 has multiple first conductors 31, and the second cable bus 4 has multiple second conductors 41. Both the first conductors 31 and the second conductors 41 have copper cores.

[0018] Reference Figure 2 , Figure 3 The connector 1 contains multiple copper rods 5 for connecting the first conductor 31 and the second conductor 41 respectively. Each end of the copper rod 5 has a connecting hole 51, which allows the core of the first conductor 31 and the core of the second conductor 41 to be inserted. The copper rods 5 are deformed by external pressure and then pressed together with the core. An insulating layer 6 is wrapped between the multiple copper rods 5. The insulating layer 6 is made of epoxy resin.

[0019] Reference Figure 2 The connector 1 includes a seat 11 located inside the deep well pump and a stainless steel sleeve 12 connected to the seat 11 and located outside the deep well pump. The end of the seat 11 is provided with an internal threaded annular groove 111, and the end of the stainless steel sleeve 12 is integrally provided with an external threaded sleeve 121 threaded into the internal threaded annular groove 111. The seat 11 and the stainless steel sleeve 12 can wrap around the multiple copper rods 5 and the insulation layer 6 inside. At the same time, the circumference of the stainless steel sleeve 12 away from the seat 11 is integrally provided with a constricted portion 122 that abuts against the insulation layer 6, and the end of the seat 11 away from the stainless steel sleeve 12 is integrally provided with multiple guide sleeves 112 for multiple second wires 41 to pass through.

[0020] Principle: Multiple copper rods 5 inside connector 1 are used, with connection holes 51 at both ends of the copper rods 5 for the cores of the first conductor 31 and the second conductor 41 to be inserted respectively. At this time, the copper rods 5 can connect the first cable bus 3 and the second cable bus 4. Meanwhile, the multiple copper rods 5 are wrapped and insulated by the insulating layer 6, so that the motor can be powered normally. When the surface of the first cable bus 3 is damaged and water enters, the water can be blocked at the position of the copper rods 5, thus preventing external water from entering the motor through the damaged first cable bus 3.

Claims

1. A waterproof cable assembly for a deep well pump, characterized in that: The device includes a connector (1) with one end inside the deep well pump and the other end outside the deep well pump, a connecting plate (2) sleeved on the connector (1) and used for connecting to the deep well pump, a first cable bus (3) with one end connected to an external power source and the other end connected to the connector (1), and a second cable bus (4) with one end connected to a motor inside the deep well pump and the other end connected to the connector (1). The first cable bus (3) has multiple first conductors (31), and the second cable bus (4) includes multiple second conductors (41). The connector (1) is provided with multiple copper rods (5) for connecting the first conductors (31) and the second conductors (41) respectively. Both ends of the copper rods (5) are provided with connecting holes (51) for the cores of the first conductors (31) and the cores of the second conductors (41) to be inserted respectively. An insulating layer (6) is wrapped between the multiple copper rods (5).

2. The waterproof cable assembly for a deep well pump according to claim 1, characterized in that: The copper rod (5) is deformed by external pressure at both ends and then pressed into the wire core.

3. The waterproof cable assembly for a deep well pump according to claim 1, characterized in that: The insulating layer (6) is made of epoxy resin.

4. The waterproof cable assembly for a deep well pump according to claim 1, characterized in that: The connector (1) includes a seat (11) located inside the deep well pump and a stainless steel sleeve (12) connected to the seat (11) and located outside the deep well pump.

5. A waterproof cable assembly for a deep well pump according to claim 4, characterized in that: The end of the seat sleeve (11) is provided with an internal threaded annular groove (111), and the end of the stainless steel sleeve (12) is provided with an external threaded sleeve (121) that is threaded into the internal threaded annular groove (111).

6. The waterproof cable assembly for a deep well pump according to claim 4, characterized in that: The stainless steel sleeve (12) has a constricted portion (122) on the periphery of the end away from the seat sleeve (11) that abuts against the insulating layer (6).

7. A waterproof cable assembly for a deep well pump according to claim 4, characterized in that: The seat sleeve (11) is provided with a plurality of guide sleeves (112) at one end away from the stainless steel sleeve (12), which are respectively for multiple second wires (41) to pass through.

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