Waterproof flexible cable for submersible pump and installation method

Abstract

The invention relates to the technical field of cable installation, in particular to a waterproof flexible cable for a submersible pump and an installation method. The invention provides a waterproof flexible cable for a submersible pump, which comprises a cable body, a sleeve is sleeved outside the cable body, one end of the sleeve is in threaded connection with a first locking assembly, the other end of the sleeve is in threaded connection with a second locking assembly, and the screwing directions of threads at two ends of the sleeve are opposite; the first locking assembly comprises a first locking sleeve in threaded connection with the sleeve, a plurality of first locking blocks are arranged in the first locking sleeve, and the sleeve moves to push the first locking blocks to lock the cable body; the second locking assembly comprises a second locking sleeve, a second locking block is arranged in the second locking sleeve, and the sleeve moves to push the second locking block to lock the cable body. The cable can be conveniently fixed at a preset position, and the fixing position of the cable can be flexibly adjusted as required so as to adapt to the installation and use of the whole equipment.

Description

Technical Field

[0001] The invention relates to the technical field of cable installation, and in particular to a waterproof soft cable for a submersible pump and an installation method thereof. Background Art

[0002] Submersible pump is a device for extracting water from deep wells. When in use, the entire unit dives into the water to extract groundwater to the surface for use in domestic water, mine rescue, industrial cooling, farmland irrigation, seawater lifting, ship load adjustment, fountain landscaping and other fields. Submersible pump cables are used in conjunction with submersible pumps for underwater applications.

[0003] The cable needs to be laid underwater with the submersible pump. During the underwater use, the cable will be constantly impacted by the water flow in random directions, which will affect the cable itself. In addition, the impact of the water flow will cause a large traction force to be applied to the connection between the cable and the equipment, affecting the connection, resulting in performance and life. In the prior art, most of the locks are used to limit the laying position of the cable. The cable passes through the lock to limit the movement of the cable, such as a U-shaped lock, to reduce the impact of the cable's underwater movement on the equipment. However, when the cable is impacted underwater, the long-term and large-force contact between the cable and the lock will cause the cable to wear, causing damage to the insulating sheath and even the internal conductor, affecting the performance and life of the cable. Summary of the invention

[0004] In order to solve the technical problem in the prior art that the cable fixing method may damage the cable sheath and even the internal conductor and affect the cable life, the present invention provides a waterproof soft cable for a submersible pump and an installation method. The cable can be conveniently fixed in a predetermined position and the fixing position of the cable can be flexibly adjusted when necessary to adapt to the installation and use of the overall equipment.

[0005] The present invention provides a waterproof soft cable for a submersible pump, comprising a cable body, a sleeve connected to the outer shell of the cable body, one end of the sleeve being threadedly connected to a first locking assembly, the other end of the sleeve being threadedly connected to a second locking assembly, and the threads at both ends of the sleeve are in opposite directions; the first locking assembly comprises a first locking sleeve threadedly connected to the sleeve, a plurality of first locking blocks arranged in an array along the circumferential direction of the first locking sleeve to surround the cable body are arranged in the first locking sleeve, the sleeve moves in an axial direction of the first locking sleeve to push the first locking block to move in a radial direction of the first locking sleeve to lock the cable body; the second locking assembly comprises a second locking sleeve threadedly connected to the sleeve, a plurality of second locking blocks arranged in an array along the circumferential direction of the second locking sleeve to surround the cable body are arranged in the second locking sleeve, the sleeve moves in an axial direction of the second locking sleeve to push the second locking block to move in a radial direction of the second locking sleeve to lock the cable body. By rotating the sleeve, the first locking assembly and the second locking assembly can lock the cable body on both sides of the sleeve at the same time, or by the first locking assembly and the second locking assembly can loosen the cable body on both sides of the sleeve at the same time, the cable can be conveniently fixed at a predetermined position when the installation position is determined, and the cable body can be conveniently slid in the first locking assembly and the second locking assembly when the installation position of the equipment needs to be adjusted, so that the cable can follow the submersible pump to conveniently and flexibly adjust the installation position.

[0006] Furthermore, the first locking block includes a first locking portion, a side of the first locking portion facing the cable body is an arc surface parallel to the axial direction of the first locking sleeve, a side of the first locking portion facing away from the cable body is an inclined surface, and a thickness of the first locking portion gradually decreases along the direction of the first locking portion toward the sleeve, and a first pressing portion is provided on the side of the first locking portion facing the sleeve, and the first pressing portion is adapted to the first locking portion on the side facing the cable body; the sleeve pushes the first pressing portion to move toward the first locking portion along the axial direction of the first locking sleeve so that the first locking portion moves toward the cable body along the radial direction of the first locking sleeve, and a first limiting end portion to limit the position of the first locking portion is provided on the end of the first sleeve facing away from the sleeve.

[0007] Furthermore, the first locking block also includes a first limiting portion, which is arranged on a side of the first locking portion facing away from the sleeve, and a first limiting end portion is located on a side of the first limiting portion facing away from the first locking portion to limit the position of the first limiting portion, and the sleeve pushes the first pressing portion to move toward the first locking portion along the axial direction of the first locking sleeve so that the first pressing portion abuts against the first limiting portion. The sleeve pushes the first pressing portion to move toward the first locking portion along the axial direction of the first locking sleeve, and the first limiting portion abuts against the first limiting end portion. The first pressing portion presses the first locking portion to move toward the cable body, and the first pressing portion moves in a direction away from the sleeve, and the limit position of the movement is that the first pressing portion abuts against the first limiting portion.

[0008] Furthermore, the first locking sleeve is provided with a first T-shaped slot in the axial direction, and the first limiting portion is provided with a first T-shaped slide that cooperates with the first T-shaped slot, and the first T-shaped slide can move in the first T-shaped slot along the radial direction of the first locking sleeve. Through the cooperation of the first T-shaped slot and the first T-shaped slide, the position of the first locking block in the first locking sleeve can be relatively fixed, and it can only move along the direction of the first T-shaped slot in the axial direction of the first locking sleeve. In the radial direction of the first locking sleeve, the size of the first T-shaped slot in the axial direction of the first locking sleeve is larger than the size of the first T-shaped slide, and the first locking block can move with a displacement in the radial direction of the first locking sleeve.

[0009] Furthermore, a first through hole is opened in the first locking sleeve, the first through hole is in the shape of a truncated cone and the area of ​​the first through hole facing one end of the sleeve is larger than the area of ​​the first through hole facing away from the sleeve; the side of the first locking block facing the cable body is an arc surface parallel to the axial direction of the first locking sleeve, and the side of the first locking block facing away from the cable body is adapted to the first through hole; a first pushing portion is provided at one end of the sleeve facing the first locking sleeve, and the first pushing portion pushes the first locking block along the axial direction of the first locking sleeve to move along the axial direction of the first locking sleeve so that the first locking block moves toward the cable body along the radial direction of the first locking sleeve.

[0010] Furthermore, a first limiting sleeve is fixedly connected to a side of the first locking sleeve facing away from the sleeve, and a first limiting spring cooperating with the first locking block is arranged at one end of the first limiting sleeve facing the sleeve. When the sleeve does not push the first locking block, the first limiting spring pushes the first locking block in the direction of the sleeve, the distance between the locking blocks is large, the cable body has sufficient activity space, the first locking block does not contact the cable body, and has no force on the cable body. At this time, there is no blocking force when pulling the cable body to adjust the position of the cable body and the first locking assembly, which is convenient for adjusting the position of the cable body and the first locking assembly. In actual application, when the submersible pump needs to be moved or the installation position needs to be changed, it is convenient to pull the cable body in the first locking assembly to adjust the position to adapt to the change of the installation position or the position of the submersible pump.

[0011] Furthermore, the second locking block includes a second locking portion, and the side of the second locking portion facing the cable body is an arc surface parallel to the axial direction of the second locking sleeve, and the side of the second locking portion facing away from the cable body is an inclined surface. Along the direction of the second locking portion toward the sleeve, the thickness of the second locking portion gradually decreases, and a second pressing portion is provided on the side of the second locking portion facing the sleeve, and the second pressing portion is adapted to the second locking portion on the side facing the cable body; the sleeve pushes the second pressing portion to move toward the second locking portion along the axial direction of the second locking sleeve so that the second locking portion moves toward the cable body along the radial direction of the second locking sleeve, and a second limiting end portion is provided at the end of the second sleeve facing away from the sleeve to limit the position of the second locking portion.

[0012] Furthermore, a first through hole is provided in the first locking sleeve, the second through hole is in a truncated cone shape and the area of ​​the second through hole toward one end of the sleeve is larger than the area of ​​the second through hole toward the end of the sleeve; the side of the second locking block toward the cable body is an arc surface parallel to the axial direction of the second locking sleeve, and the side of the second locking portion facing away from the cable body is adapted to the second through hole; a second pushing portion is provided at one end of the sleeve toward the second locking sleeve, and the second pushing portion pushes the second locking block along the axial direction of the second locking sleeve to move along the axial direction of the second locking sleeve so that the second locking block moves toward the cable body along the radial direction of the second locking sleeve.

[0013] Furthermore, the outside of the first locking sleeve is fixedly connected to two first connecting plates arranged in parallel, a gap is provided between the two first connecting plates, a first connecting hole is provided on the first connecting plate, and the parallel direction of the two first connecting plates is the same as the axial direction of the first locking sleeve; the outside of the second locking sleeve is fixedly connected to two second connecting plates arranged in parallel, a gap is provided between the two second connecting plates, a second connecting hole is provided on the second connecting plate, and the parallel direction of the two second connecting plates is the same as the axial direction of the second locking sleeve.

[0014] The present invention also provides an installation method for a waterproof soft cable for a submersible pump, comprising the following steps: S1, sleeve a second locking sleeve from one end of a cable body, insert a second T-shaped slide of a second locking block into the second locking sleeve along a second T-shaped slide groove, and then insert the second pressing portion into the second locking sleeve; S2, sleeve sleeve from one end of the cable body, screw the sleeve into the second locking sleeve toward one end of the second locking sleeve to lock the cable body; S3, sleeve a first locking sleeve from one end of the cable body, insert the first T-shaped slide of the first locking block into the first locking sleeve along the first T-shaped slide groove, and then insert the first pressing portion into the first locking sleeve; S4, screw the sleeve into the first locking sleeve toward one end of the first locking sleeve to lock the cable body.

[0015] The beneficial effects of the present invention are: By rotating the sleeve, the first locking assembly and the second locking assembly can lock the cable body on both sides of the sleeve at the same time, or by the first locking assembly and the second locking assembly can loosen the cable body on both sides of the sleeve at the same time, the cable can be conveniently fixed at a predetermined position when the installation position is determined, and the cable body can be conveniently loosened when the installation position of the equipment needs to be adjusted. The cable body can also be made to slide in the first locking assembly and the second locking assembly, so that the cable can follow the submersible pump to conveniently and flexibly adjust the installation position.

[0016] The cable is impacted by water flow in random directions underwater, and the first and second locking sleeves on the outside are mainly subjected to the impact force. When the first locking sleeve is subjected to the force from the direction of the first locking sleeve toward the sleeve, the first locking sleeve tends to move in this direction, thereby increasing the force of the first locking sleeve on the first locking block, thereby improving the locking force on the cable body and improving the stability of the cable; similarly, when the second locking sleeve is subjected to the force from the direction of the second locking sleeve toward the sleeve, it can also improve the locking force on the cable body and improve the stability of the cable. The first locking assembly and the second locking assembly are arranged relative to each other, which can at least ensure that the locking assembly at one end of the sleeve has a greater locking force under the impact of water flow, thereby ensuring the stability of the entire cable.

[0017] The locking position of the cable body is adjustable by the first locking component and the second locking component. One side of the locking position of the cable provides a controllable length space for a section connected to the submersible pump, thereby keeping the connection between the cable and the submersible pump in a relaxed state. It will not be too tight to cause a large tensile force on the connection, nor will it be too loose to cause the cable to float frequently with the water flow, which is beneficial to the stability of the connection between the submersible pump and the cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 It is a structural schematic diagram of an embodiment of the present invention; Figure 2 It is a structural schematic diagram of an embodiment of the present invention; Figure 3 It is a structural schematic diagram of an embodiment of the first locking assembly of the present invention; Figure 4 It is a structural schematic diagram of an embodiment of the present invention in which the first locking assembly locks the cable body; Figure 5 A schematic structural diagram of an embodiment of the present invention in which the first locking assembly releases the cable body; Figure 6 It is a structural schematic diagram of an embodiment of the cooperation between the first limiting portion and the first locking sleeve of the present invention; Figure 7 It is a structural schematic diagram of an embodiment of the first locking assembly of the present invention; Figure 8 It is a structural schematic diagram of an embodiment of the sleeve of the present invention; Fig. 9It is a structural schematic diagram of an embodiment of the present invention in which the first locking assembly locks the cable body; Fig.10 A schematic structural diagram of an embodiment of the present invention in which the first locking assembly releases the cable body; Fig.11 A schematic structural diagram of an embodiment of the present invention in which the first locking assembly releases the cable body; Fig.12 It is a structural schematic diagram of an embodiment of the second locking assembly of the present invention locking the cable body; Fig.13 It is a structural schematic diagram of an embodiment of the second locking assembly of the present invention for locking the cable body.

[0020] Explanation of main figure markings: 1-first locking assembly, 11-first locking sleeve, 12-first locking block, 121-first locking part, 122-first limiting part, 1221-first T-shaped slide, 13-first pressing part, 141-first limiting sleeve, 142-first limiting spring, 151-first T-shaped slide, 2-second locking assembly, 21-second locking sleeve, 22-second locking block, 221-second locking part, 222-second limiting part, 23-second pressing part, 3-sleeve, 31-first limiting end, 32-second limiting end, 331-first pushing part, 332-second pushing part, 341 first connecting plate, 3411-first connecting hole, 342-second connecting plate, 3422-second connecting hole, 35-rotating rod, 4-cable body. DETAILED DESCRIPTION

[0021] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments 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 creative work should fall within the scope of protection of the present invention.

[0022] like Figure 1As shown, an embodiment of the present invention provides a waterproof flexible cable for a submersible pump, including a cable body 4, a sleeve 3 is connected to the outer shell of the cable body 4, and a first locking assembly 1 is threadedly connected to one end of the sleeve 3. The first locking assembly 1 includes a first locking sleeve 11 threadedly connected to the sleeve 3, and a plurality of first locking blocks 12 are arranged in the first locking sleeve 11 and are distributed in an array along the circumferential direction of the first locking sleeve 11 to surround the cable body 4. The first locking block 12 includes a first locking portion 121, and the first locking portion 121 is an arc surface parallel to the axial direction of the first locking sleeve 11 on one side facing the cable body 4. The cutting line of this arc surface along the axial direction is a straight line, and the cutting line along the radial direction is an arc. The inward side surfaces of the plurality of first locking blocks 12 distributed in an array along the circumferential direction of the first locking sleeve 11 are combined into a cylindrical or nearly cylindrical shape. When the first locking block 12 locks the cable body 4 inwardly, the contact area with the cable body 4 is large, the force surface is large, and the locking effect is better. The side of the first locking portion 121 facing away from the cable body 4 is an inclined surface, which can be a plane inclined surface or a curved inclined surface, preferably a curved inclined surface. Along the direction of the first locking portion 121 toward the sleeve 3, the thickness of the first locking portion 121 gradually decreases, and a cavity is left on the side of the first locking portion 121 facing the sleeve 3. The cavity on the side of the first locking portion 121 facing the sleeve 3 is provided with a first pressing portion 13. The surface of the first pressing portion 13 facing the side of the cable body 4 is adapted to the first locking portion 121, and the sleeve 3 pushes the first pressing portion 13 to move toward the first locking portion 121 along the axial direction of the first locking sleeve 11 The first locking sleeve 11 and the first pressing part 13 remain relatively unchanged in the radial direction. With the help of the contact and matching surface of the first pressing part 13 and the first locking part 121, the first pressing part 13 presses the first locking part 121 to move toward the cable body 4 along the radial direction of the first locking sleeve 11, thereby locking the cable body 4. The end of the first sleeve 3 facing away from the sleeve 3 is provided with a first limiting end 31 that limits the position of the first locking part 121. The first limiting end 31 limits the axial movement of the first locking part 121, so that the first pressing part 13 presses the first locking part 121 to lock the cable body 4 along the radial direction. The waterproof flexible cable in the embodiment of the present invention can be fixed at a preset installation position and has waterproof performance. The first locking assembly 1, the second locking assembly 2 and the cable body 4 in the embodiment of the present invention do not need to be waterproof.

[0023] like Figure 3 , Figure 4 , Figure 5 , Figure 6As shown, in a preferred embodiment, the first locking block 12 also includes a first limiting portion 122, the first limiting portion 122 is fixedly connected to the first locking portion 121 or the two are an integrated structure, the first limiting portion 122 is arranged on the side of the first locking portion 121 facing away from the sleeve 3, the first limiting end portion 31 is located on the side of the first limiting portion 122 facing away from the first locking portion 121 to limit the position of the first limiting portion 122, and the position of the first locking block 12 is limited to the position in the direction away from the sleeve 3 by the first limiting end portion 31, the first limiting end portion 31 and the first clamping portion 13 cooperate to make the first locking block 12 move along the axial direction toward the direction of the cable body 4, thereby locking the cable body 4. Specifically, the sleeve 3 pushes the first clamping portion 13 along the axial direction of the first locking sleeve 11 to move toward the first locking portion 121, the first limiting portion 122 abuts against the first limiting end 31, the first clamping portion 13 presses the first locking portion 121 to move toward the cable body 4, and the first clamping portion 13 moves away from the sleeve 3, and the extreme position of the movement is that the first clamping portion 13 abuts against the first limiting portion 122. In one embodiment of the present invention, a first T-shaped slot 151 is provided in the axial direction of the first locking sleeve 11, and the first limiting portion 122 is provided with a first T-shaped slide 1221 cooperating with the first T-shaped slot 151. The first T-shaped slide 1221 can move in the first T-shaped slot 151 along the radial direction of the first locking sleeve 11. Through the cooperation of the first T-shaped slot 151 and the first T-shaped slide 1221, the position of the first locking block 12 in the first locking sleeve 11 can be relatively fixed, and it can only move along the direction of the first T-shaped slot 151 in the axial direction of the first locking sleeve 11. In the radial direction of the first locking sleeve 11, the dimension of the first T-shaped slot 151 along the axial direction of the first locking sleeve 11 is larger than the dimension of the first T-shaped slide 1221, and the first locking block 12 can move with a displacement in the radial direction of the first locking sleeve 11. Regarding the position of the first clamping portion 13, corresponding sliding grooves and slides may be provided on the first locking sleeve 11 and the first clamping portion 13 for cooperation. For example, the first clamping portion 13 may be provided with a first clamping slide that cooperates with the first T-shaped sliding groove 151, or corresponding sliding grooves and slides may not be provided for cooperation. The surface of the first locking portion 121 facing the first locking sleeve 11 provides a bearing surface for the first clamping portion 13, thereby maintaining the stability of the first clamping portion 13.

[0024] like Figure 7 , Figure 8 , Fig. 9 , Fig.10 , Fig.11As shown, in one embodiment of the present invention, the first through hole in the first locking sleeve 11 is in a truncated cone shape and the area of ​​the first through hole facing the end of the sleeve 3 is larger than the area of ​​the first through hole facing away from the end of the sleeve 3, that is, along the direction of the sleeve 3 toward the first locking sleeve 11, the cross-sectional area of ​​the first through hole gradually decreases; the side of the first locking block 12 facing the cable body 4 is an arc surface parallel to the axial direction of the first locking sleeve 11, and a plurality of first locking blocks 12 are combined to sleeve the cable body 4 therein, and the first locking block 12 moves toward the direction of the cable body 4 to lock the cable body 4, and the first locking block The shape of the side 12 facing away from the cable body 4 is adapted to the first through hole; a first pushing portion 331 is provided at one end of the sleeve 3 facing the first locking sleeve 11, and the first pushing portion 331 pushes the first locking block 12 to move along the axial direction of the first locking sleeve 11. Since the first locking block 12 is in contact with the side of the first locking sleeve 11 facing the cable body 4, as the first locking block 12 moves in the direction away from the sleeve 3, the radial distance between the first locking block 12 and the cable body 4 gradually decreases until the two are in contact to lock the cable body 4. In a preferred embodiment, the first locking sleeve 11 is fixedly connected to the side facing away from the sleeve 3 with a first limiting sleeve 141, and the first limiting sleeve 141 is provided with a first limiting spring 142 cooperating with the first locking block 12 on one end facing the sleeve 3. When the sleeve 3 does not push the first locking block 12, the first limiting spring 142 pushes the first locking block 12 in the direction of the sleeve 3. The distance between each locking block is large, and the cable body 4 has sufficient space for movement. The first locking block 12 does not contact the cable body 4 and has no force on the cable body 4. At this time, there is no blocking force when pulling the cable body 4 to adjust the position of the cable body 4 and the first locking assembly 1, so it is convenient to adjust the position of the cable body 4 and the first locking assembly 1. In actual application, when the submersible pump needs to be moved or the installation position needs to be changed, it is convenient to pull the cable body 4 in the first locking assembly 1 to adjust the position to adapt to the change of the installation position or the position of the submersible pump.

[0025] like Fig.11 , Fig.12As shown, the other end of the sleeve 3 is threadedly connected with the second locking assembly 2, and the second locking assembly 2 includes a second locking sleeve 21 threadedly connected with the sleeve 3. A plurality of second locking blocks 22 are arranged in the second locking sleeve 21 and are distributed in an array along the circumferential direction of the second locking sleeve 21 to surround the cable body 4. The sleeve 3 moves along the axial direction of the second locking sleeve 21 to push the second locking block 22 to move and lock the cable body 4 along the radial direction of the second locking sleeve 21. In one embodiment, the second locking block 22 includes a second locking portion 221, and the side of the second locking portion 221 facing the cable body 4 is an arc surface parallel to the axial direction of the second locking sleeve 21. The cutting line of the arc surface along the axial direction is a straight line, and the cutting line along the radial direction is an arc. The inward side surfaces of the plurality of second locking blocks 22 distributed in an array along the circumferential direction of the second locking sleeve 21 are combined into a cylindrical or nearly cylindrical shape. When the second locking block 22 locks the cable body 4 inwardly, the contact area with the cable body 4 is large, the force surface is large, and the locking effect is better. The side of the second locking portion 221 facing away from the cable body 4 is an inclined surface, which can be a plane inclined surface or a curved inclined surface, preferably a curved inclined surface. Along the direction of the second locking portion 221 toward the sleeve 3, the thickness of the second locking portion 221 gradually decreases, and a cavity is left on the side of the second locking portion 221 facing the sleeve 3. The cavity on the side of the second locking portion 221 facing the sleeve 3 is provided with a second pressing portion 23. The surface of the second pressing portion 23 facing the side of the cable body 4 is adapted to the second locking portion 221, and the sleeve 3 pushes the second pressing portion 23 to move toward the second locking portion 221 along the axial direction of the second locking sleeve 21. The second locking sleeve 21 and the second pressing portion 23 remain relatively unchanged in radial position. With the help of the contact and matching surface of the second pressing portion 23 and the second locking portion 221, the second pressing portion 23 presses the second locking portion 221 to move toward the cable body 4 in the radial direction of the second locking sleeve 21, thereby locking the cable body 4. The second sleeve 3 is provided with a second limiting end portion 32 that limits the position of the second locking portion 221 at one end facing away from the sleeve 3. The second limiting end portion 32 limits the axial movement of the second locking portion 221, so that the second pressing portion 23 presses the second locking portion 221 to lock the cable body 4 in the radial direction. The second locking block 22 also includes a second limiting portion 222, which is fixedly connected to the second locking portion 221 or the two are an integrated structure, and the second limiting portion 222 is arranged on the side of the second locking portion 221 facing away from the sleeve 3, and the second limiting end 32 is located on the side of the second limiting portion 222 facing away from the second locking portion 221 to limit the position of the second limiting portion 222, and the position of the second locking block 22 is limited to the position away from the sleeve 3 by the second limiting end 32, and the second limiting end 32 and the second clamping portion 23 cooperate to make the second locking block 22 move along the axial direction toward the direction of the cable body 4, thereby locking the cable body 4.Specifically, the sleeve 3 pushes the second clamping portion 23 along the axial direction of the second locking sleeve 21 to move toward the second locking portion 221, the second limiting portion 222 abuts against the second limiting end 32, the second clamping portion 23 presses the second locking portion 221 to move toward the cable body 4, and the second clamping portion 23 moves away from the sleeve 3, and the extreme position of the movement is that the second clamping portion 23 abuts against the second limiting portion 222. In one embodiment of the present invention, a second T-shaped slot is provided in the axial direction of the second locking sleeve 21, and the second limiting portion 222 is provided with a second T-shaped slide that cooperates with the second T-shaped slot. The second T-shaped slide can move in the second T-shaped slot along the radial direction of the second locking sleeve 21. Through the cooperation of the second T-shaped slot and the second T-shaped slide, the position of the second locking block 22 in the second locking sleeve 21 can be relatively fixed, and it can only move in the direction of the second T-shaped slot in the axial direction of the second locking sleeve 21. In the radial direction of the second locking sleeve 21, the size of the second T-shaped slot along the axial direction of the second locking sleeve 21 is larger than the size of the second T-shaped slide, and the second locking block 22 can move with a displacement in the radial direction of the second locking sleeve 21. Regarding the position of the second clamping portion 23, corresponding sliding grooves and slides can also be set on the second locking sleeve 21 and the second clamping portion 23 for cooperation. For example, the second clamping portion 23 is provided with a second clamping slide that cooperates with the second T-shaped sliding groove, or corresponding sliding grooves and slides may not be set for cooperation. The surface of the second locking portion 221 facing the second locking sleeve 21 provides a bearing surface for the second clamping portion 23, thereby maintaining the stability of the second clamping portion 23. One embodiment of the present invention provides an installation method for a waterproof flexible cable for a submersible pump, comprising the following steps: S1, sleeve a second locking sleeve 21 from one end of a cable body 4, insert a second T-shaped slide of a second locking block 22 into the second locking sleeve 21 along a second T-shaped slide groove, and then insert the second pressing portion 23 into the second locking sleeve 21; S2, sleeve a sleeve 3 from one end of the cable body 4, and screw the sleeve 3 into the second locking sleeve 21 toward one end of the second locking sleeve 21 to lock the cable body 4; S3, sleeve a first locking sleeve 11 from one end of the cable body 4, and insert the first T-shaped slide 1221 of the first locking block 12 into the first locking sleeve 11 along a first T-shaped slide groove 151, and then insert the first pressing portion 13 into the first locking sleeve 11; S4, screw the sleeve 3 into the first locking sleeve 11 toward one end of the first locking sleeve 11 to lock the cable body 4.

[0026] In one embodiment, the second through hole in the second locking sleeve 21 is in a truncated cone shape, and the area of ​​the second through hole facing the end of the sleeve 3 is larger than the area of ​​the second through hole facing away from the sleeve 3, that is, along the direction of the sleeve 3 toward the second locking sleeve 21, the cross-sectional area of ​​the second through hole gradually decreases; the side of the second locking block 22 facing the cable body 4 is an arc surface parallel to the axial direction of the second locking sleeve 21, and a plurality of second locking blocks 22 are combined to sleeve the cable body 4 therein, and the second locking block 22 moves in the direction of the cable body 4 to lock the cable body 4, and the second locking block 22 is back The shape of the side facing the cable body 4 is adapted to the second through hole; a second pushing portion 332 is provided at one end of the sleeve 3 facing the second locking sleeve 21, and the second pushing portion 332 pushes the second locking block 22 to move along the axial direction of the second locking sleeve 21. Since the second locking block 22 is in contact with the side of the second locking sleeve 21 facing the cable body 4, as the second locking block 22 moves in the direction away from the sleeve 3, the radial distance between the second locking block 22 and the cable body 4 gradually decreases until the two are in contact to lock the cable body 4. In a preferred embodiment, the second locking sleeve 21 is fixedly connected to the side facing away from the sleeve 3 with a second limit sleeve, and the second limit sleeve is provided with a second limit spring cooperating with the second locking block 22 at one end facing the sleeve 3. When the sleeve 3 does not push the second locking block 22, the second limit spring pushes the second locking block 22 in the direction of the sleeve 3. The distance between each locking block is large, and the cable body 4 has sufficient space for movement. The second locking block 22 does not contact the cable body 4 and has no force on the cable body 4. At this time, there is no blocking force when pulling the cable body 4 to adjust the position of the cable body 4 and the second locking assembly 2, so it is convenient to adjust the position of the cable body 4 and the second locking assembly 2. In actual application, when the submersible pump needs to be moved or the installation position needs to be changed, it is convenient to pull the cable body 4 in the second locking assembly 2 to adjust the position to adapt to the change of the installation position or the position of the submersible pump. An embodiment of the present invention provides an installation method for a waterproof flexible cable for a submersible pump, comprising the following steps: S1, sleeve a second locking sleeve 21 from one end of a cable body 4, and insert a second locking block 22 into the second locking sleeve 21; S2, sleeve a sleeve 3 from one end of the cable body 4, and screw the sleeve 3 into the second locking sleeve 21 toward one end of the second locking sleeve 21 to lock the cable body 4; S3, sleeve a first locking sleeve 11 from one end of the cable body 4, and insert a first locking block 12 into the first locking sleeve 11; S4, screw the sleeve 3 into the first locking sleeve 11 toward one end of the first locking sleeve 11 to lock the cable body 4.

[0027] In an embodiment of the present invention, the first locking assembly 1 and the second locking assembly 2 can adopt the same configuration, that is, the first locking assembly 1 and the second locking assembly 2 can be symmetrically arranged on the left and right; the first locking assembly 1 and the second locking assembly 2 can also adopt different configurations, for example, the various embodiments of the above-mentioned first locking assembly 1 and the second locking assembly 2 can be freely combined and used.

[0028] The other end of the sleeve 3 is threadedly connected to the second locking assembly 2. The threads at both ends of the sleeve 3 are in opposite directions. The two ends of the sleeve 3 are respectively threaded into the first locking assembly 1 and the second locking assembly 2, fixing the first locking assembly 1 and the second locking assembly 2 so that they cannot rotate and do not restrict the axial movement of the two. When the sleeve 3 is rotated, the first locking assembly 1 and the second locking assembly 2 move toward the sleeve 3 or move away from the sleeve 3 at the same time. The first locking assembly 1 and the second locking assembly 2 move toward the sleeve 3 at the same time. The first locking assembly 1 and the second locking assembly 2 lock the cable body 4, and the cable body 4 is fixed to a predetermined position. The first locking assembly 1 and the second locking assembly 2 move away from the sleeve 3 at the same time, and the cable body 4 is separated from the first locking block 12 and the second locking block 22, so as to facilitate the adjustment of the relative position of the cable body 4 and the first locking assembly 1 and the second locking assembly 2. After the cable body 4 is in the working position, the sleeve 3 is rotated to allow the first locking assembly 1 and the second locking assembly 2 to lock the cable body 4. Figure 2As shown, in one embodiment, the outside of the first locking sleeve 11 is fixedly connected to two first connecting plates 341 arranged in parallel, with a gap between the two first connecting plates 341, and a first connecting hole 3411 is opened on the first connecting plate 341, and the parallel direction of the two first connecting plates 341 is the same as the axial direction of the first locking sleeve 11; the outside of the second locking sleeve 21 is fixedly connected to two second connecting plates 342 arranged in parallel, with a gap between the two second connecting plates 342, and a second connecting hole 3422 is opened on the second connecting plate 342, and the parallel direction of the two second connecting plates 342 is the same as the axial direction of the second locking sleeve 11. The axial direction of the tight sleeve 21 is the same. In this embodiment, the first locking assembly 1 is connected to the external fixing frame through the first connecting plate 341. For example, a simpler external fixing frame is a plate with holes, and the connecting plate is fixed to the external fixing frame by bolts. The second locking assembly 2 is connected to the external fixing frame through the second connecting plate 342. For example, a simpler external fixing frame is a plate with holes, and the connecting plate is fixed to the external fixing frame by bolts. When the sleeve 3 needs to be rotated, the bolts used for fixing at both ends are removed, and the sleeve 3 is rotated to loosen or lock the first locking block 12 or the second locking block 22. In this embodiment, the gap between the two parallel first connecting plates 341 or the two parallel second connecting plates 342 constitutes a track for the first locking assembly 1 and the second locking assembly 2 to move when the sleeve 3 rotates. It is only necessary to have an external fixing frame that can be between the two parallel first connecting plates 341 or the two parallel second connecting plates 342. The shape requirements of the external fixing frame are lower, and no additional customized tools are required. A rotating rod 35 is fixedly arranged outside the sleeve 3 for facilitating the rotation of the sleeve 3 . A groove is provided at one end of the rotating rod 35 facing away from the sleeve 3 , so that a tool such as a push rod can be inserted into the groove to rotate the rotating rod 35 , thereby rotating the sleeve 3 .

[0029] Although the present invention has been described in detail with reference to the accompanying drawings and in combination with the preferred embodiments, the present invention is not limited thereto. Without departing from the spirit and essence of the present invention, a person of ordinary skill in the art may make various equivalent modifications or substitutions to the embodiments of the present invention, and these modifications or substitutions shall be within the scope of the present invention. Any person of ordinary skill in the art may easily think of changes or substitutions within the technical scope disclosed by the present invention, and these shall be within the scope of protection of the present invention.

Claims

1. A waterproof flexible cable for a submersible pump, comprising a cable body, a sleeve connected to the outer shell of the cable body, characterized in that: One end of the sleeve is threadedly connected to a first locking assembly, and the other end of the sleeve is threadedly connected to a second locking assembly, and the threads at both ends of the sleeve have opposite rotation directions; The first locking assembly includes a first locking sleeve threadedly connected to the sleeve, wherein a plurality of first locking blocks are arranged in an array along the circumferential direction of the first locking sleeve to surround the cable body, and the sleeve moves along the axial direction of the first locking sleeve to push the first locking blocks to move along the radial direction of the first locking sleeve to lock the cable body; The second locking assembly includes a second locking sleeve threadedly connected to the sleeve, and the second locking sleeve is provided with a plurality of second locking blocks distributed in an array along the circumferential direction of the second locking sleeve to surround the cable body. The sleeve moves along the axial direction of the second locking sleeve to push the second locking blocks to move along the radial direction of the second locking sleeve to lock the cable body.

2. A waterproof flexible cable for a submersible pump as claimed in claim 1, characterized in that: The first locking block includes a first locking portion, a side of the first locking portion facing the cable body is an arc surface parallel to the axial direction of the first locking sleeve, a side of the first locking portion facing away from the cable body is an inclined surface, and a thickness of the first locking portion gradually decreases along the direction of the first locking portion toward the sleeve, and a first pressing portion is provided on the side of the first locking portion facing the sleeve, and the first pressing portion is adapted to the first locking portion on the side facing the cable body; the sleeve pushes the first pressing portion to move toward the first locking portion along the axial direction of the first locking sleeve so that the first locking portion moves toward the cable body along the radial direction of the first locking sleeve, and a first limiting end portion that limits the position of the first locking portion is provided at an end of the first sleeve facing away from the sleeve.

3. A waterproof flexible cable for a submersible pump as claimed in claim 2, characterized in that: The first locking block also includes a first limiting portion, which is arranged on a side of the first locking portion facing away from the sleeve, and a first limiting end portion is located on a side of the first limiting portion facing away from the first locking portion to limit the position of the first limiting portion, and the sleeve pushes the first pressing portion toward the first locking portion along the axial direction of the first locking sleeve to make the first pressing portion abut against the first limiting portion.

4. A waterproof flexible cable for a submersible pump as claimed in claim 3, characterized in that: The first locking sleeve is provided with a first T-shaped slot in the axial direction, and the first limiting portion is provided with a first T-shaped slide matched with the first T-shaped slot. The first T-shaped slide can move in the first T-shaped slot along the radial direction of the first locking sleeve.

5. A waterproof flexible cable for a submersible pump as claimed in claim 1, characterized in that: A first through hole is provided in the first locking sleeve, the first through hole is in a truncated cone shape, and the area of ​​the first through hole facing one end of the sleeve is larger than the area of ​​the first through hole facing away from the sleeve; the side of the first locking block facing the cable body is an arc surface parallel to the axial direction of the first locking sleeve, and the side of the first locking block facing away from the cable body is adapted to the first through hole; a first pushing portion is provided at one end of the sleeve facing the first locking sleeve, and the first pushing portion pushes the first locking block along the axial direction of the first locking sleeve to move along the axial direction of the first locking sleeve so that the first locking block moves toward the cable body along the radial direction of the first locking sleeve.

6. A waterproof flexible cable for a submersible pump as claimed in claim 5, characterized in that: A first limiting sleeve is fixedly connected to a side of the first locking sleeve facing away from the sleeve, and a first limiting spring cooperating with the first locking block is arranged at one end of the first limiting sleeve facing the sleeve.

7. A waterproof flexible cable for a submersible pump according to any one of claims 1 to 6, characterized in that: The second locking block includes a second locking portion, a side of the second locking portion facing the cable body is an arc surface parallel to the axial direction of the second locking sleeve, a side of the second locking portion facing away from the cable body is an inclined surface, and a thickness of the second locking portion gradually decreases along the direction of the second locking portion toward the sleeve, and a second pressing portion is provided on the side of the second locking portion facing the sleeve, and the second pressing portion is adapted to the second locking portion on the side facing the cable body; the sleeve pushes the second pressing portion to move toward the second locking portion along the axial direction of the second locking sleeve so that the second locking portion moves toward the cable body along the radial direction of the second locking sleeve, and a second limiting end portion that limits the position of the second locking portion is provided at the end of the second sleeve facing away from the sleeve.

8. A waterproof flexible cable for a submersible pump according to any one of claims 1 to 6, characterized in that: A second through hole is provided in the second locking sleeve, and the second through hole is in the shape of a truncated cone, and the area of ​​the second through hole facing one end of the sleeve is larger than the area of ​​the second through hole facing away from the sleeve; the side of the second locking block facing the cable body is an arc surface parallel to the axial direction of the second locking sleeve, and the side of the second locking portion facing away from the cable body is adapted to the second through hole; a second pushing portion is provided at one end of the sleeve facing the second locking sleeve, and the second pushing portion pushes the second locking block along the axial direction of the second locking sleeve to move along the axial direction of the second locking sleeve so that the second locking block moves toward the cable body along the radial direction of the second locking sleeve.

9. A waterproof flexible cable for a submersible pump as claimed in claim 1, characterized in that: The outside of the first locking sleeve is fixedly connected with two first connecting plates arranged in parallel, with a gap between the two first connecting plates, a first connecting hole is opened on the first connecting plate, and the parallel direction of the two first connecting plates is the same as the axial direction of the first locking sleeve; the outside of the second locking sleeve is fixedly connected with two second connecting plates arranged in parallel, with a gap between the two second connecting plates, a second connecting hole is opened on the second connecting plate, and the parallel direction of the two second connecting plates is the same as the axial direction of the second locking sleeve.

10. A method for installing a waterproof flexible cable for a submersible pump, applied to the waterproof flexible cable according to claim 4, characterized in that: The following steps are involved: S1, sleeve the second locking sleeve from one end of the cable body, insert the second T-shaped slide of the second locking block into the second locking sleeve along the second T-shaped slide groove, and then insert the second pressing part into the second locking sleeve; S2, a sleeve is sleeved from one end of the cable body, and the sleeve is screwed into the second locking sleeve toward one end of the second locking sleeve to lock the cable body; S3, sleeve a first locking sleeve from one end of the cable body, insert the first T-shaped slide of the first locking block into the first locking sleeve along the first T-shaped slide groove, and then insert the first pressing part into the first locking sleeve; S4, the end of the sleeve facing the first locking sleeve is screwed into the first locking sleeve to lock the cable body.

Images