Submersible pump cable sealing structure

Abstract

The submersible pump cable sealing structure comprises a pump body and a cable used for supplying power to a submersible pump, one end of the cable enters the pump body from the outside of the pump body, and the cable and the pump body are in sealed connection through a sealing structure; the sealing structure comprises a metal ring sleeved on the outer side wall of the cable and a plurality of rubber rings, and when the metal ring is matched with the rubber rings, because the slope of the side face of the circular truncated cone concave position is larger than that of the side face of the hollow circular truncated cone body, the circular truncated cone concave position is located between the hollow circular truncated cone bodies to form a gap cavity. When the submersible pump is used for a long time, even if the joint of the pump body and the cable is abraded, the sealing can be kept under the action of the pre-elasticity of the rubber ring, so that the service life of the submersible pump is prolonged, the service life of the submersible pump is prolonged, and the service life of the submersible pump is prolonged. Therefore, the submersible pump has long-time sealing performance, and the service life of the submersible pump is prolonged.

Description

Technical Field

[0001] The utility model belongs to the technical field of submersible pump sealing structures, in particular to a submersible pump cable sealing structure. Background Art

[0002] Submersible pumps are important equipment for deep well water extraction. When in use, the entire unit submerges into the water to extract groundwater to the surface. It is an important equipment for domestic water use, mine rescue, industrial cooling, farmland irrigation, seawater lifting, ship loading and other work.

[0003] When the submersible pump is working, the whole unit needs to be submerged in water, the motor and the corresponding electronic control components are installed in the pump body, and the cable is connected to the power supply device on the ground after extending out of the pump body. Therefore, the waterproof sealing structure between the cable and the pump body of the submersible pump is very important. Once the seal fails, the motor or control board will malfunction.

[0004] In order to improve the sealing performance of the connection between the submersible pump cable and the pump body, various submersible pump manufacturers have designed a variety of cable sealing structures, but the sealing effect is still poor. The submersible pump cable sealing structure of the prior art is shown in the Chinese patent document with patent application number 202321130809.7, which discloses a sealing structure of a submersible electric pump cable, which seals the cable by setting a sealing mechanism. The sealing mechanism includes a base, which is fixedly connected to the middle of the top of the motor compartment, and the top of the water inlet is connected to the top cover by fixing bolts. The top cover and the middle of the base are provided with a connecting block, and the middle of the connecting block is fixedly connected with a plurality of cables. The top of the cable passes through the top of the top cover and is arranged inside the sealing rubber sleeve. The sealing rubber sleeve is fixedly connected to the top of the top cover. The upper and lower parts of the connecting block are provided with rubber blocks, which are arranged on both sides of the cable, and the rubber blocks are arranged in the upper and lower parts of the top cover and the base. After the top cover and the base are fixed by fixing bolts, the rubber block can be squeezed, and then the space inside the top cover and the base can be filled by the deformation of the rubber block to avoid the invasion of external water vapor and realize the fixing and sealing of the cable.

[0005] However, this sealing structure requires the use of a top cover to compress the seal. During long-term use, once the rubber block is worn or aged, a gap will appear between the rubber block and the cable. The rubber block pressed inside the top cover cannot fill the gap in time, which will cause the sealing of the submersible pump to fail and water to enter the submersible pump, causing a malfunction. Utility Model Content

[0006] In order to overcome the deficiencies of the prior art, the utility model provides a submersible pump cable sealing structure.

[0007] The technical solution adopted by the utility model to solve its technical problems is:

[0008] A submersible pump cable sealing structure comprises a pump body and a cable for supplying power to the submersible pump, one end of the cable enters the pump body from the outside of the pump body, and the cable and the pump body are sealed and connected via a sealing structure; the sealing structure comprises a metal ring and a plurality of rubber rings sleeved on the outer wall of the cable, the pump body is provided with an electrical connection hole for the cable to pass through and enter the pump body for connection, the aperture of the electrical connection hole is adapted to the outer diameters of the metal ring and the rubber ring, both ends of the metal ring are provided with hollow frustum bodies for cooperating with the rubber ring, the hollow frustum bodies at both ends of the metal ring are arranged in mirror symmetry, and the corresponding rubber rings cooperating with the hollow frustum bodies at both ends of the metal ring are also distributed in mirror symmetry; one end of the rubber ring is provided with a frustum concave position for cooperating with the hollow frustum concave position, and the side slope of the frustum concave position is greater than the side slope of the hollow frustum concave position.

[0009] In the utility model, at least three rubber rings are arranged at both ends of the metal ring, and the rubber rings are stacked. The other end of the rubber ring is provided with a truncated cone boss adapted to the truncated cone recess; adjacent rubber rings are stacked by matching the truncated cone recess of one rubber ring with the truncated cone boss of another rubber ring.

[0010] In the utility model, the outer wall of the cable is also sleeved with a fastening connector, which is fastened to the power connection hole from the outside of the pump body, and abuts against the outer end of the rubber ring. The end of the fastening connector abutting against the rubber ring is provided with a conical abutting recess adapted to the conical boss.

[0011] In the utility model, there are two cables, one of which is used to supply power to the submersible pump, and the other is used to supply power for signal transmission of the submersible pump. Both cables are sealed and connected to the pump body through a sealing structure.

[0012] In the utility model, a separation ring protruding toward the inside of the power connection hole is provided in the power connection hole, and the separation ring divides the power connection hole into an outer sealing hole and an inner sealing hole, wherein the rubber ring and the metal ring are both arranged in the outer sealing hole, and the inner sealing hole is provided with a sealing retaining ring, and the cable passes through the sealing retaining ring into the pump body.

[0013] The beneficial effect of the utility model is that when the metal ring and the rubber ring are matched, since the side slope of the truncated cone recess is greater than the side slope of the hollow truncated cone body, a gap cavity is formed between the truncated cone recess and the hollow truncated cone body, and the rubber ring at one end is squeezed by external force, the rubber ring will be squeezed and deformed toward one side of the gap cavity, and the outer edge of the rubber ring stretches around so that the outer periphery of the rubber ring is in close contact with the inner wall of the power connection hole. Therefore, when the submersible pump is installed with a cable, it only needs to apply a certain squeezing force to the end of the rubber ring so that the rubber ring has a pre-elastic force that stretches outwards, so that the outer periphery of the rubber ring is in close contact with the inner wall of the power connection hole. During the long-term use of the submersible pump, even if the connection between the pump body and the cable is worn, the sealing can be maintained under the action of the pre-elastic force of the rubber ring, thereby ensuring that the submersible pump has a long-term sealing performance and extending the service life of the submersible pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the internal structure of the submersible pump of this embodiment;

[0015] Figure 2 for Figure 1 A magnified view of part A;

[0016] Figure 3 Schematic diagram of the top structure of the metal ring in this embodiment;

[0017] Figure 4 Schematic diagram of the bottom structure of the metal ring in this embodiment;

[0018] Figure 5 Schematic diagram of the top structure of the rubber ring in this embodiment;

[0019] Figure 6 Schematic diagram of the bottom structure of the rubber ring in this embodiment;

[0020] Figure 7 This is an exploded view of the connection between the metal ring and the rubber ring in this embodiment;

[0021] Figure 8 Schematic diagram of the bottom structure of the fastening connector of this embodiment. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the embodiments of the present utility model clearer, the technical solution in the embodiments of the present utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the present utility model.

[0023] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, top, bottom, inside, outside, vertical, horizontal, longitudinal, counterclockwise, clockwise, circumferential, radial, axial...), then the directional indication is only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0024] In addition, if there are descriptions involving "first" or "second" etc. in the embodiments of the utility model, the descriptions of "first" or "second" etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0025] like Figures 1 to 8As shown, this embodiment discloses a submersible pump cable sealing structure, including a pump body 1 and a cable 2 for powering the submersible pump, one end of the cable 2 enters the pump body 1 from the outside of the pump body 1, and the cable 2 and the pump body 1 are sealed and connected through a sealing structure; the sealing structure includes a metal ring 3 and a plurality of rubber rings 4 sleeved on the outer wall of the cable 2, the pump body 1 is provided with an electric connection hole 11 for the cable 2 to pass through and enter the pump body 1 for connection, the aperture of the electric connection hole 11 is adapted to the outer diameters of the metal ring 3 and the rubber ring 4, both ends of the metal ring 3 are provided with hollow truncated cone bodies 31 for matching with the rubber ring 4, the hollow truncated cone bodies 31 at both ends of the metal ring 3 are arranged in mirror symmetry, and the corresponding rubber rings 4 matching with the hollow truncated cone bodies 31 at both ends of the metal ring 3 are also distributed in mirror symmetry; one end of the rubber ring 4 is provided with a truncated cone recess 41 for matching with the hollow truncated cone body 31, and the side of the truncated cone recess 41 The slope is greater than the side slope of the hollow truncated cone body 31, so that when the metal ring 3 and the rubber ring 4 are matched, since the side slope of the truncated cone recess 41 is greater than the side slope of the hollow truncated cone body 31, a gap cavity is formed between the truncated cone recess 41 and the hollow truncated cone body 31, and the rubber ring 4 at one end is squeezed by an external force, and the rubber ring 4 will be squeezed and deformed toward one side of the gap cavity, and the outer edge of the rubber ring 4 stretches around, so that the outer periphery of the rubber ring 4 is tightly attached to the inner wall of the power connection hole 11. Therefore, when the submersible pump is installed on the cable 2, it only needs to apply a certain squeezing force on the end of the rubber ring 4 to make the rubber ring 4 have a pre-elastic force extending outward, so that the outer periphery of the rubber ring 4 is tightly attached to the inner wall of the power connection hole 11. During the long-term use of the submersible pump, even if the connection between the pump body 1 and the cable 2 is worn, it can also maintain sealing under the action of the pre-elastic force of the rubber ring 4, thereby ensuring that the submersible pump has a longer-term sealing performance and extending the service life of the submersible pump.

[0026] In this embodiment, in order to make the connection between the cable 2 and the pump body 1 have better sealing performance, at least three rubber rings 4 are arranged at both ends of the metal ring 3, and the rubber rings 4 are arranged in a stacked manner. The other end of the rubber ring 4 is provided with a truncated cone boss 42 adapted to the truncated cone recess 41. When the rubber rings 4 are stacked and installed in sequence, the adjacent rubber rings 4 are stacked in a manner that the truncated cone recess 41 of one rubber ring 4 cooperates with the truncated cone boss 42 of another rubber ring 4, so that the rubber rings 4 are tightly connected to ensure their sealing effect.

[0027] In this embodiment, the outer wall of the cable 2 is also sleeved with a fastening connector 5, which is fastened to the power connection hole 11 from the outside of the pump body 1, and abuts against the outer end of the rubber ring 4. The end of the fastening connector 5 abutting against the rubber ring 4 is provided with a truncated cone abutting recess 51 adapted to the truncated cone boss 42; so that when the fastening connector 5 enters the power connection hole 11 for connection, the truncated cone abutting recess 51 at the end of the fastening connector 5 cooperates with the truncated cone boss 42 of the rubber ring 4, which also plays a certain sealing role, and ensures the contact area between the two, so that the abutting pressure on each part of the rubber ring 4 is uniform, and the sealing effect of the submersible pump cable 2 is also relatively uniform.

[0028] In this embodiment, there are two cables 2, one of which is a cable 2 for supplying power to the submersible pump, and the other is a cable 2 for supplying power to the signal transmission of the submersible pump, and both cables 2 are sealed and connected to the pump body 1 through a sealing structure. The cable 2 for supplying power to the submersible pump is generally thicker, so the fastening connector 5 used to match it is fixedly connected to the pump body 1 by bolts; while the cable 2 for supplying power to the signal transmission of the submersible pump is generally thinner, so the fastening connector 5 used to match it can be directly threaded to the power connection hole 11.

[0029] In this embodiment, in order to further improve the sealing performance of the submersible pump cable 2, a separating ring 12 protruding toward the inside of the power connection hole 11 is provided in the power connection hole 11, and the separating ring 12 divides the power connection hole 11 into an outer sealing hole and an inner sealing hole, wherein the rubber ring 4 and the metal ring 3 are both arranged in the outer sealing hole, and the inner sealing hole is provided with a sealing retaining ring 6, and the cable 2 passes through the sealing retaining ring 6 to enter the pump body 1.

[0030] The above description is only a preferred embodiment of the present invention. Any technical solution that achieves the purpose of the present invention by substantially the same means shall fall within the protection scope of the present invention.

Claims

1. Submersible pump cable sealing structure, Features: The invention comprises a pump body (1) and a cable (2) for supplying power to a submersible pump, wherein one end of the cable (2) enters the pump body (1) from the outside of the pump body (1), and the cable (2) and the pump body (1) are sealed and connected via a sealing structure; the sealing structure comprises a metal ring (3) and a plurality of rubber rings (4) sleeved on the outer wall of the cable (2); the pump body (1) is provided with an electric connection hole (11) through which the cable (2) can pass to enter the pump body (1) for connection; the diameter of the electric connection hole (11) is the same as that of the metal ring (3) and the rubber ring (4). The outer diameter of the metal ring (3) is matched, and hollow truncated cone bodies (31) for cooperating with the rubber ring (4) are provided at both ends of the metal ring (3), and the hollow truncated cone bodies (31) at both ends of the metal ring (3) are arranged in a mirror-symmetrical manner. Correspondingly, the rubber rings (4) cooperating with the hollow truncated cone bodies (31) at both ends of the metal ring (3) are also distributed in a mirror-symmetrical manner. One end of the rubber ring (4) is provided with a truncated cone recess (41) for cooperating with the hollow truncated cone body (31), and the side slope of the truncated cone recess (41) is greater than the side slope of the hollow truncated cone body (31).

2. The submersible pump cable sealing structure according to claim 1, Features: At least three rubber rings (4) are arranged at both ends of the metal ring (3), and the rubber rings (4) are arranged in a stacked manner. The other end of the rubber ring (4) is provided with a truncated cone boss (42) adapted to the truncated cone recess (41); adjacent rubber rings (4) are stacked in a manner such that the truncated cone recess (41) of one rubber ring (4) cooperates with the truncated cone boss (42) of another rubber ring (4).

3. The submersible pump cable sealing structure according to claim 1, Features: The outer wall of the cable (2) is also sleeved with a fastening connector (5), the fastening connector (5) is fastened to the power connection hole (11) from the outside of the pump body (1), the fastening connector (5) abuts against the outer end of the rubber ring (4), and one end of the fastening connector (5) abutting against the rubber ring (4) is provided with a truncated cone abutting recess (51) adapted to the truncated cone boss (42).

4. The submersible pump cable sealing structure according to claim 1, Features: There are two cables (2), one of which is a cable (2) used to supply power to the submersible pump, and the other is a cable (2) used to supply power for signal transmission of the submersible pump. Both cables (2) are sealedly connected to the pump body (1) via a sealing structure.

5. The submersible pump cable sealing structure according to claim 1, Features: A separation ring (12) protruding toward the inside of the power connection hole (11) is provided in the power connection hole (11), and the separation ring (12) divides the power connection hole (11) into an outer sealing hole and an inner sealing hole, wherein the rubber ring (4) and the metal ring (3) are both arranged in the outer sealing hole, and the inner sealing hole is provided with a sealing retaining ring (6), and the cable (2) passes through the sealing retaining ring (6) and enters the pump body (1).

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