Cable joint sealing structure

Abstract

The utility model discloses a cable joint sealing structure, which relates to the technical field of submersible pump cable joints and comprises a water pump motor cable-passing elbow and a sealing structure, one end of the water pump motor cable-passing elbow is connected onto a submersible pump body, and the sealing structure is mounted inside the water pump motor cable-passing elbow. The sealing structure can elastically seal a cable and comprises a cable sealing plug, sealing pore plates and an O-shaped ring, the water pump motor cable-passing elbow and the submersible pump body are respectively provided with a stepped hole, the water pump motor cable-passing elbow is provided with a ring groove, and the two sealing pore plates are respectively arranged in the stepped hole of the water pump motor cable-passing elbow and the stepped hole of the submersible pump body. According to the water pump motor cable-passing elbow, the two sealing plates are arranged in the water pump motor cable-passing elbow, the sealing performance of the joint of the water pump motor cable-passing elbow and the pump body of the submersible pump is higher through interference fit of the cable and the cable sealing plug, and the submersible pump is safer to use.

Description

Technical Field

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

[0002] A submersible pump is a type of water pump. The entire pump submerges in water to draw groundwater to the surface. It's commonly used for urban drainage, domestic water, industrial cooling, farmland irrigation, seawater lifting, fountain landscapes, and fire emergency response. The impeller, guide vanes, and motor of a submersible pump all operate submerged in water. Due to their small size and light weight, submersible pumps are widely used in urban drainage and agricultural irrigation.

[0003] The submersible pump is used underwater, and the cable connecting the motor also needs to be put underwater to connect to the motor. The other end of the cable is connected to the power supply. When the power supply is energized, the motor rotates and the water pump works. However, the cable must be connected to the motor through a cable connector. In order to prevent water from entering the motor housing cavity, we need to ensure that the cable connector and the connecting hole on the motor housing are well sealed. In response to the above problems, the inventors proposed a cable connector sealing structure to solve the above problems. Utility Model Content

[0004] In order to solve the sealing problem of the cable joint and the connecting hole on the motor housing when the submersible pump is used underwater, the purpose of the utility model is to provide a cable joint sealing structure.

[0005] In order to solve the above technical problems, the utility model adopts the following technical solutions: a cable joint sealing structure, including a water pump motor cable elbow and a sealing structure, one end of the water pump motor cable elbow is connected to the submersible pump body, and the sealing structure is installed inside the water pump motor cable elbow, and the sealing structure can elastically seal the cable;

[0006] The sealing structure includes a cable sealing plug, a sealing orifice plate and an O-ring. The water pump motor cable elbow and the submersible pump body have step holes respectively, the water pump motor cable elbow has a ring groove, and the two sealing orifice plates are respectively placed in the step hole of the water pump motor cable elbow and the step hole of the submersible pump body. The cable sealing plug is placed between the two sealing orifice plates, and the O-ring is placed in the ring groove of the water pump motor cable elbow. When the water pump motor cable elbow is connected to the submersible pump body, and the cable is inserted into the cable sealing plug and the two sealing orifice plates, the axial height of the cable sealing plug is compressed, the cable sealing plug is deformed and fits tightly with the cable, and fits tightly with the entire inner wall. At the same time, the O-ring is compressed, and the O-ring is deformed and fits tightly with the entire inner wall.

[0007] Preferably, the water pump motor cable elbow is L-shaped, and the water pump motor cable elbow can be detachably installed on the submersible pump body. The stepped hole of the water pump motor cable elbow has the same axial diameter as the stepped hole of the submersible pump body. The stepped hole of the water pump motor cable elbow is provided with a contact pressure surface for contacting with a sealing orifice plate, and the stepped hole of the submersible pump body is provided with a contact pressure surface for contacting with another sealing orifice plate.

[0008] Preferably, a sealing orifice plate is placed on the contact and pressure surface of the stepped hole of the cable elbow of the water pump motor, and another sealing orifice plate is placed on the contact and pressure surface of the stepped hole of the submersible pump body. The cable sealing plug is placed between the two sealing orifice plates, and the cable sealing plug is set in a conical shape. The cable sealing plug and the two sealing orifice plates each have 4 holes for inserting cables, and the cable and the cable sealing plug are interference fit.

[0009] Preferably, the O-ring is placed in the ring groove of the water pump motor cable elbow. When the water pump motor cable elbow is connected to the submersible pump body, the end face of the water pump motor cable elbow is combined with the end face of the submersible pump body to compress the O-ring. One end of the water pump motor cable elbow is threaded with three countersunk bolts distributed in an annular manner, and the countersunk bolts can be threaded into the submersible pump body. Sealing gaskets are provided on the three countersunk bolts.

[0010] Compared with the prior art, the beneficial effects of the present invention are:

[0011] In the utility model, two sealing plates are arranged inside, and the interference fit between the cable and the cable sealing plug makes the sealing performance of the joint between the water pump motor cable elbow and the submersible pump body higher, making the submersible pump safer to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0013] Figure 1 This is a schematic diagram of the overall structure of the utility model;

[0014] Figure 2 This is a schematic diagram of the structure of the cable elbow for the water pump motor of the utility model;

[0015] Figure 3 This is a schematic diagram of the cross-sectional structure of the cable elbow for the water pump motor of the utility model.

[0016] In the figure: 1. Sealing orifice plate; 2. Cable sealing plug; 3. O-ring; 4. Water pump motor cable elbow; 5. Submersible pump body; 6. Countersunk bolt; 7. Sealing gasket. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0018] Example: Figure 1-3 As shown, the utility model provides a cable connector for a submersible pump, including a water pump motor cable elbow 4 and a sealing structure. One end of the water pump motor cable elbow 4 is connected to the submersible pump body 5, and the sealing structure is installed inside the water pump motor cable elbow 4. The sealing structure elastically seals the cable.

[0019] Specifically, the water pump motor cable elbow 4 is L-shaped, which is convenient for cable connection, protects the connection and reduces bending loss. The sealing structure includes a cable sealing plug 2, a sealing orifice plate 1 and an O-ring 3. The water pump motor cable elbow 4 and the submersible pump body 5 each have a stepped hole, and the water pump motor cable elbow 4 has a ring groove. The two sealing orifice plates 1 are respectively placed in the step holes of the water pump motor cable elbow 4 and the submersible pump body 5, the cable sealing plug 2 is placed between the two sealing orifice plates 1, and the O-ring 3 is placed in the ring groove of the water pump motor cable elbow 4.

[0020] Furthermore, one end of the water pump motor cable elbow 4 is threadedly inserted with three countersunk bolts 6 distributed in a ring, and the countersunk bolts 6 can be threadedly inserted in the submersible pump body 5. The three countersunk bolts 6 are all provided with sealing gaskets 7. When the water pump motor cable elbow 4 is connected to the submersible pump body 5, the cable is inserted through the cable sealing plug 2 and the two sealing orifice plates 1. The water pump motor cable elbow 4 is installed on the submersible pump body 5 using the countersunk bolts 6. When the countersunk bolts 6 are screwed and tightened, the axial height of the cable sealing plug 2 is compressed, and the cable sealing plug 2 is deformed to fit tightly with the cable and the entire inner wall. At the same time, the O-ring 3 is compressed, and the O-ring 3 is deformed to fit tightly with the entire inner wall.

[0021] The stepped hole of the water pump motor cable elbow 4 has the same axial diameter as the stepped hole of the submersible pump body 5. The stepped hole of the water pump motor cable elbow 4 is provided with a contact pressure surface for contacting with the sealing orifice plate 1, and the stepped hole of the submersible pump body 5 is provided with a contact pressure surface for contacting with another sealing orifice plate 1. The sealing orifice plate 1 is placed on the contact pressure surface of the stepped hole of the water pump motor cable elbow 4, and the other sealing orifice plate 1 is placed on the contact pressure surface of the stepped hole of the submersible pump body 5.

[0022] In this example, the cable sealing plug 2 is placed between two sealing orifice plates 1. The cable sealing plug 2 is tapered, with the thin end facing the submersible pump body 5. The cable sealing plug 2 and the two sealing orifice plates 1 each have 4 holes for passing the cable. The cable and the cable sealing plug 2 are interference fit. The cable sealing plug 2 is designed to be tapered so that when its axial height is compressed, there is a certain space for deformation so that it will not flow out from the gap. The cable and the cable sealing plug 2 are interference fit, so that when the cable sealing plug 2 is deformed, the cable is pressed tighter. At the same time, the cable sealing plug 2 fills the entire inner wall. Due to the elastic sealing of the cable sealing plug 2 and the elastic sealing of the O-ring 3, the sealing performance of the connection between the water pump motor cable elbow 4 and the submersible pump body 5 is better.

[0023] Obviously, those skilled in the art may make various modifications and variations to the present invention without departing from the spirit and scope of the present invention. Thus, if such modifications and variations fall within the scope of the claims of the present invention and their equivalents, the present invention is intended to include such modifications and variations.

Claims

1. A cable joint sealing structure, comprising a water pump motor cable elbow (4) and a sealing structure, characterized in that: One end of the water pump motor cable elbow (4) is connected to the submersible pump body (5), and a sealing structure is installed inside the water pump motor cable elbow (4), and the sealing structure can elastically seal the cable; The sealing structure comprises a cable sealing plug (2), a sealing orifice plate (1) and an O-ring (3); the water pump motor cable elbow (4) and the submersible pump body (5) respectively have step holes; the water pump motor cable elbow (4) is provided with a ring groove; the two sealing orifice plates (1) are respectively placed in the step holes of the water pump motor cable elbow (4) and the step holes of the submersible pump body (5); the cable sealing plug (2) is placed between the two sealing orifice plates (1); the O-ring (3) is placed In the groove of the water pump motor cable elbow (4), when the water pump motor cable elbow (4) is connected to the submersible pump body (5), and the cable is inserted into the cable sealing plug (2) and the two sealing orifice plates (1), the axial height of the cable sealing plug (2) is compressed, and the cable sealing plug (2) is deformed to fit tightly with the cable and the entire inner wall. At the same time, the O-ring (3) is compressed, and the O-ring (3) is deformed to fit tightly with the entire inner wall.

2. A cable joint sealing structure according to claim 1, characterized in that: The water pump motor cable elbow (4) is L-shaped, and the water pump motor cable elbow (4) is detachably mounted on the submersible pump body (5).

3. A cable joint sealing structure according to claim 1, characterized in that: The stepped hole of the water pump motor cable elbow (4) has the same axial diameter as the stepped hole of the submersible pump body (5); the stepped hole of the water pump motor cable elbow (4) is provided with a contact pressure surface for contacting the sealing orifice plate (1); and the stepped hole of the submersible pump body (5) is provided with a contact pressure surface for contacting the other sealing orifice plate (1).

4. A cable joint sealing structure according to claim 1, characterized in that: The sealing orifice plate (1) is placed on the contact pressure surface of the stepped hole of the water pump motor cable elbow (4), and the other sealing orifice plate (1) is placed on the contact pressure surface of the stepped hole of the submersible pump body (5).

5. A cable joint sealing structure according to claim 1, characterized in that: The cable sealing plug (2) is placed between the two sealing hole plates (1), and the cable sealing plug (2) is arranged in a conical shape. The cable sealing plug (2) and the two sealing hole plates (1) each have four holes for inserting cables, and the cable and the cable sealing plug (2) are interference fit.

6. A cable joint sealing structure according to claim 1, characterized in that: The O-ring (3) is placed in the ring groove of the water pump motor cable elbow (4). When the water pump motor cable elbow (4) is connected to the submersible pump body (5), the end surface of the water pump motor cable elbow (4) is combined with the end surface of the submersible pump body (5), compressing the O-ring (3).

7. A cable joint sealing structure according to claim 1, characterized in that: One end of the water pump motor cable elbow (4) is threadedly inserted with three annularly distributed countersunk bolts (6), and the countersunk bolts (6) can be threadedly inserted into the submersible pump body (5), and the three countersunk bolts (6) are all sleeved with sealing gaskets (7).

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