CN111237205A - Cable protection and unit anti-lifting combined device for submersible electric pump - Google Patents

Abstract

The invention discloses a combined device for cable protection and unit lifting prevention for a submersible electric pump, comprising a main wellbore, a well cover, a submersible electric pump, a cable sealing pipe and a combination mechanism, wherein a submersible electric pump is arranged inside the main wellbore, and the The top outlet end of the submersible electric pump is fixedly connected with a cable sealing pipe, the top of the cable sealing pipe is fixedly connected with a combination mechanism, and the top of the main wellbore is fixedly installed with a manhole cover; in the present invention, the pressure plate and the sealing gasket are fixed after the manhole cover is installed. On the manhole cover, the anti-lifting pressure ring is set to press and lock the submersible electric pump through the screw, which can effectively prevent the submersible electric pump from lifting, rotating, tilting, etc.; The arrangement of sealing gasket, O-ring and outlet pipe sealing gasket can effectively seal, prevent the external conveying medium from entering the inside of the cable sealing pipe through the mating surface and gap, so as to effectively protect the cable.

Description

A combined device for cable protection and unit lifting prevention for submersible electric pump

technical field

The invention relates to the technical field of submersible electric pumps, in particular to a combined device for cable protection and unit lift prevention for submersible electric pumps.

Background technique

Submersible electric pumps are widely used in industrial and agricultural production, mining, urban construction and other fields, mainly used for drainage, irrigation, landscape, source water improvement, river management, etc.;

For the convenience of maintenance and maintenance, the submersible electric pump adopts the wellbore installation method. The typical wellbore installation methods include steel wellbore and cement wellbore. In actual use, the submersible electric pump often causes the submersible electric pump unit to lift, rotate, and tilt due to the reverse torque generated by the start of the pump or the reverse water thrust generated by the reversal of the pump, resulting in the submersible motor cable churning, and finally the cable is damaged or The submersible pump unit cannot be operated due to the breakage, or the unit vibrates due to the inclination of the submersible pump unit. At the same time, since the submersible pump is installed in the wellbore and the cable is in contact with the conveying medium, long-term erosion of the cable or impact by foreign objects will cause the cable to wear out. In the end, after the cable surface is damaged, water will enter the cable from the damaged part, and flow into the motor cavity through the gap between the cable cores, resulting in the failure of the motor water alarm to operate or the stator burning and major quality accidents.

SUMMARY OF THE INVENTION

In order to overcome the above-mentioned technical problems, the purpose of the present invention is to provide a combination device for cable protection and unit lifting prevention for a submersible electric pump. Medium contact, long-term scouring of cables or impact by foreign objects will lead to cable wear, reverse torque generated by the start of the submersible pump unit or reverse water thrust generated by the reversal of the pump, which may cause the pump body to rotate or tilt, resulting in unstable operation or failure of the unit. accident problem. The patent of the present invention invents a combination device for cable protection and unit lifting prevention for submersible electric pump, which can effectively prevent the submersible electric pump unit from lifting, rotating, tilting, cable wear and other faults during the operation of the submersible electric pump.

The object of the present invention can be realized through the following technical solutions:

A combined device for cable protection and unit lift prevention for a submersible electric pump, comprising a main wellbore, a well cover, a submersible electric pump, a cable sealing tube, and a combination mechanism, wherein the main wellbore is provided with a submersible electric pump, and the submersible electric pump has a The top outlet end is fixedly connected with a cable sealing pipe, the top of the cable sealing pipe is fixedly connected with a combination mechanism, the top of the main wellbore is fixedly installed with a well cover, and the well cover is fixedly connected with the combination mechanism;

The main wellbore comprises a cylinder body 1, a seat ring is welded and fixed at the bottom of the cylinder body 1, the seat ring adopts a 60° cone angle, and a submersible electric pump is placed on the seat ring; the outer part of the cylinder body 1 is welded A base flange and a reinforcing rib plate are fixed, and the base flange is located above the reinforcing rib plate; a side wellbore is fixedly installed on one side of the cylinder body 1.

As a further solution of the present invention: the cable sealing tube includes a cable tube, hanger plates are fixedly installed on both ends of the top of the cable tube, an upper flange is installed on the top of the cable tube, and the bottom of the cable tube is fixed A tapered tube is installed, the bottom of the tapered tube is fixedly installed with the second cylinder, the bottom of the second cylinder is fixedly installed with a lower flange, the lower flange is fixedly connected with the flange on the submersible electric pump, the The top outlet end of the submersible electric pump is inserted into the second cylinder body and the conical tube.

As a further solution of the present invention: the combination mechanism includes a sealing tube, a pressure ring, a sealing seat, a pressure plate, a sealing flange, a bolt 1, a bolt 2, and a bolt 3, a pressure plate is fixedly installed on the manhole cover, and a pressure plate is installed above the pressure plate. The first bolt is fixedly connected with a sealing seat, the sealing seat is a Z-shaped structure, and a pressure ring is fixedly connected above the sealing seat through the third bolt; the second bolt is vertically arranged on one end of the pressure plate close to the sealing pipe; the sealing A sealing flange is installed at the lower end of the pipe, and the sealing flange is connected with the upper flange through the second bolt, and the second bolt is locked by the screw. Above the screw, press the anti-lifting machine pressure plate through the screw hole on the pressure plate, and then use the nut to lock the screw to prevent loosening.

As a further solution of the present invention, an O-ring is arranged between the sealing seat and the pressure ring.

As a further solution of the present invention, an anti-lifting pressure ring is sleeved on the second bolt, and the anti-lifting pressure ring is located under the pressure plate.

As a further solution of the present invention, a sealing gasket is arranged between the pressing plate, the sealing seat and the well cover.

As a further solution of the present invention, an outlet pipe sealing gasket is arranged between the upper flange and the sealing flange.

As a further scheme of the present invention: the installation steps of the combined device are:

Step 1. The top outlet end of the submersible electric pump is fixedly connected to the cable sealing tube. First, insert the top outlet end of the submersible electric pump into the second cylinder and the cone tube, fix it through the lower flange, and lift the submersible electric pump through the lifting lug, then The submersible electric pump is placed on the wellbore seat ring, the seat ring adopts a 60° cone angle, and the submersible electric pump sits on the seat ring by its own gravity, which has the function of automatic centering and positioning and stabilizing the pump body; The pipe gasket, the second bolt and the upper flange are connected with the combination mechanism;

Step 2: Install the manhole cover on the main wellbore, then fix the pressure plate and the gasket on the manhole cover, put an anti-lift pressure ring on the second bolt, and then press and lock the submersible electric pump through the screw;

Step 2. Install the gasket and the sealing seat on the pressure plate, and use the bolt 3 to seal the pressure ring and the sealing tube through the O-ring seal.

Beneficial effects of the present invention: the upper outlet part of the submersible electric pump of the present invention and the cable sealing tube are fastened and connected by bolts. First, the top outlet end of the submersible electric pump is inserted into the second cylinder and the tapered pipe, and is fixed by the lower flange, and is suspended by hanging The submersible electric pump is lifted by the ear, and then the submersible electric pump is placed on the wellbore seat ring. The seat ring adopts a cone angle of 60°. The submersible electric pump uses its own gravity to sit on the seat ring, which has the functions of automatic centering and positioning and stabilizing the pump body; the submersible electric pump The guide vane body and the seat ring are also designed with a 60° cone angle and equipped with a sealing ring, so that when the submersible pump is installed, the submersible pump and the seat ring can be automatically centered, positioned and sealed through the 60° cone angle;

After installing the well cover, fix the pressure plate and gasket on the well cover, and set the anti-lift pressure ring to press and lock the submersible electric pump through the screw, which can effectively prevent the submersible electric pump from lifting, rotating, tilting, etc.;

The cable gland is set to isolate the direct contact between the conveying medium and the cable. At the same time, the setting of the gasket, O-ring and outlet pipe seal can effectively seal, preventing the external conveying medium from entering the cable gland through the mating surface and gap, so as to effectively protect cable.

Description of drawings

The present invention will be further described below in conjunction with the accompanying drawings.

Fig. 1 is the overall structure schematic diagram of a kind of submersible electric pump cable protection and unit lifting combination device of the present invention;

Figure 2 is a schematic diagram of the internal structure of the cable gland in the present invention;

FIG. 3 is a schematic diagram of the internal structure of the combination mechanism in the present invention.

In the figure: 1. Sealing pipe; 2. O-ring; 3. Pressure ring; 4. Sealing seat; 5. Screw; 6. Pressure plate; 7. Gasket; 8. Manhole cover; 9. Anti-lift pressure ring; 10 , outlet pipe gasket; 11, sealing flange; 12, bolt one; 13, bolt two; 14, bolt three; 16, seat ring; 17, cylinder one; 18, submersible pump; 19, foundation flange; 20. Rib plate; 21. Cable gland; 22. Combination mechanism; 23. Main wellbore; 24. Lateral wellbore; 25. Lower flange; , Hanging plate; 30. Upper flange.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

Please refer to Figures 1-3, a combined device for cable protection and unit lifting prevention for a submersible electric pump, including a main wellbore 23, a well cover 8, a submersible electric pump 18, a cable sealing tube 21, and a combination mechanism 22. The main wellbore The inside of 23 is provided with a submersible electric pump 18, the top outlet end of the submersible electric pump 18 is fixedly connected with a cable sealing tube 21, and the top of the cable sealing tube 21 is fixedly connected with a combination mechanism 22. A manhole cover 8 is fixedly installed on the top, and the manhole cover 8 is fixedly connected with the combination mechanism 22;

The main wellbore 23 includes a cylinder body 17, the bottom of the cylinder body 17 is welded and fixed with a seat ring 16, the seat ring 16 adopts a 60° cone angle, and a submersible electric pump 18 is placed on the seat ring 16, The submersible electric pump 18 is seated on the seat ring 16 by its own gravity, and has the function of automatic centering and positioning and stabilizing the pump body; Located above the reinforcing rib plate 20; a side wellbore 24 is fixedly installed on one side of the cylinder body 17.

The cable sealing tube 21 includes a cable tube 28, the top ends of the cable tube 28 are fixedly installed with hanger plates 29, the top of the cable tube 28 is installed with an upper flange 30, and the bottom of the cable tube 28 is fixed A conical tube 27 is installed, the bottom of the conical tube 27 is fixedly installed with the second cylinder 26, the bottom of the second cylinder 26 is fixedly installed with a lower flange 25, and the lower flange 25 is connected to the submersible electric pump 18. The flanges are fixedly connected, and the top outlet end of the submersible electric pump 18 is inserted into the second cylinder 26 and the tapered tube 27 .

The combination mechanism 22 includes a sealing pipe 1, a pressing ring 3, a sealing seat 4, a pressing plate 6, a sealing flange 11, a first bolt 12, a second bolt 13, and a third bolt 14. The manhole cover 8 is fixedly installed with the pressing plate 6, so The top of the pressure plate 6 is fixedly connected with a sealing seat 4 through bolts 12, the sealing seat 4 is a Z-shaped structure, and a pressure ring 3 is fixedly connected above the sealing seat 4 through bolts 14; the pressure plate 6 is close to the seal One end of the pipe 1 is vertically provided with a second bolt 13; the lower end of the sealing pipe 1 is installed with a sealing flange 11, the sealing flange 11 is connected with the upper flange 30 by the second bolt 13, and the second bolt 13 is locked by the screw 5 The screw 5 is arranged in a circle with 4-6 pieces, which are located above the sealing flange 11 and the pressure plate 6 respectively. Anti-loose.

An O-ring 2 is arranged between the sealing seat 4 and the pressing ring 3 .

An anti-lift pressure ring 9 is sleeved on the second bolt 13 , and the anti-lift pressure ring 9 is located under the pressure plate 6 .

A sealing gasket 7 is arranged between the pressing plate 6 , the sealing seat 4 and the well cover 8 .

An outlet pipe gasket 10 is arranged between the upper flange 30 and the sealing flange 11 .

The installation steps of this combination device are:

Step 1. The top outlet end of the submersible electric pump 18 is fixedly connected to the cable sealing tube 21. First, the top outlet end of the submersible electric pump 18 is inserted into the cylinder body 26 and the tapered tube 27, and is fixed by the lower flange 25. The submersible electric pump 18 is lifted by the ear, and then the submersible electric pump 18 is seated on the wellbore seat ring 16. The seat ring 16 adopts a 60° cone angle. The submersible electric pump 18 uses its own gravity to sit on the seat ring 16 with automatic centering and positioning and stabilization of the pump. body function; and connect the cable tube 28 with the combination mechanism 22 through the sealing flange 11, the outlet tube gasket 10, the bolt 2 13 and the upper flange 30;

Step 2. Install the manhole cover 8 on the main wellbore 23, then fix the pressure plate 6 and the gasket 7 on the manhole cover 8, set the anti-lifting pressure ring 9 on the bolt 2 13, and then press the screw 5 and lock the diving. electric pump 18;

Step 2: Install the sealing gasket 7 and the sealing seat 4 on the pressing plate 6 , and use the bolts 3 14 to seal the pressing ring 3 and the sealing tube 1 through the O-ring 2 .

The working principle of the present invention: the top outlet end of the submersible electric pump 18 is fixedly connected with the cable sealing tube 21. First, the top outlet end of the submersible electric pump 18 is inserted into the second cylinder 26 and the tapered tube 27, and is fixed by the lower flange 25, And the submersible electric pump 18 is lifted by the lifting lug, and then the submersible electric pump 18 is seated on the wellbore seat ring 16, the seat ring 16 adopts a 60° cone angle, and the submersible electric pump 18 uses its own gravity to sit on the seat ring 16 with automatic centering and positioning. In order to stabilize the pump body, the submersible pump guide vane body and the seat ring are also designed with a 60° cone angle and equipped with a sealing ring, so that when the submersible pump is installed, the submersible pump and the seat ring can be realized through the 60° cone angle. Automatically locate and seal; connect the cable tube 28 with the combination mechanism 22 through the sealing flange 11, the outlet tube gasket 10, the second bolt 13 and the upper flange 30;

Install the manhole cover 8 on the main wellbore 23, then fix the pressure plate 6 and the gasket 7 on the manhole cover 8, set the anti-lifting pressure ring 9 on the second bolt 13, and then press and lock the submersible electric pump 18 through the screw 5 , which can effectively prevent the submersible pump 18 from lifting, rotating, tilting, etc.; install the sealing gasket 7 and the sealing seat 4 on the pressure plate 6, and use the bolts 3 14 to pass the pressure ring 3 and the sealing tube 1 through the O-ring 2. seal compression;

The cable gland 21 is set to isolate the direct contact between the conveying medium and the cable. At the same time, the setting of the sealing gasket 7, the O-ring 2 and the outlet pipe sealing gasket 10 can effectively seal and prevent the external conveying medium from entering the cable gland 21 through the mating surface and the gap. inside, thus effectively protecting the cable.

In the description of this specification, description with reference to the terms "one embodiment," "example," "specific example," etc. means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one aspect of the present invention. in one embodiment or example. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above contents are only examples and descriptions of the present invention, and those skilled in the art can make various modifications or supplements to the described specific embodiments or replace them in similar ways, as long as they do not deviate from the invention or exceed the present rights The scope defined by the claims shall all belong to the protection scope of the present invention.

Claims (8)

1. a submersible electric pump cable protection and unit lifting combination device, is characterized in that, comprises main wellbore (23), well cover (8), submersible electric pump (18), cable gland (21), combination mechanism ( 22), a submersible electric pump (18) is arranged inside the main wellbore (23), and a cable sealing tube (21) is fixedly connected to the top outlet end of the submersible electric pump (18), and the cable sealing tube (21) A combination mechanism (22) is fixedly connected to the top of the main wellbore (23), a well cover (8) is fixedly installed on the top of the main wellbore (23), and the well cover (8) is fixedly connected to the combination mechanism (22); The main wellbore (23) includes a first cylinder body (17), a seat ring (16) is welded and fixed at the bottom of the first cylinder body (17), and a submersible electric pump (18) is placed on the seat ring (16) ; The first cylinder body (17) is welded and fixed with a base flange (19) and a reinforcing rib plate (20), and the base flange (19) is located above the reinforcing rib plate (20); A lateral wellbore (24) is fixedly installed on one side of 17). 2. The combined device for cable protection and unit lifting prevention for a submersible electric pump according to claim 1, wherein the cable sealing tube (21) comprises a cable tube (28), and the cable tube (28) Hanging plates (29) are fixedly installed at both ends of the top of the cable tube (28), an upper flange (30) is installed at the top of the cable tube (28), and a tapered tube (27) is fixed at the bottom of the cable tube (28). A second cylinder (26) is fixedly installed on the bottom of the tapered pipe (27), and a lower flange (25) is fixedly installed at the bottom of the second cylinder (26). The flanges on the pump (18) are fixedly connected, and the top outlet end of the submersible electric pump (18) is inserted into the second cylinder (26) and the conical pipe (27). 3. The combined device for cable protection and unit lift prevention for a submersible electric pump according to claim 1, wherein the combined mechanism (22) comprises a sealing tube (1), a pressure ring (3), a sealing seat (4), pressure plate (6), sealing flange (11), bolt one (12), bolt two (13), bolt three (14), the pressure plate (6) is fixedly installed on the manhole cover (8), so A sealing seat (4) is fixedly connected to the top of the pressing plate (6) by means of one bolt (12). A pressure ring (3) is connected; two bolts (13) are vertically arranged at one end of the pressure plate (6) close to the sealing pipe (1); a sealing flange (11) is installed at the lower end of the sealing pipe (1). The sealing flange (11) is connected with the upper flange (30) by two bolts (13), and the second bolts (13) are locked by a screw (5), and the screw (5) is circumferentially arranged with 4-6 screws , respectively located above the sealing flange (11) and the pressure plate (6). 4. The combined device for cable protection and unit lifting prevention for a submersible pump according to claim 3, characterized in that an O-ring ( 2). 5. The combination device for cable protection and unit lifting prevention for a submersible electric pump according to claim 3, characterized in that an anti-lifting pressure ring (9) is sleeved on the two bolts (13). The lift ring (9) is located under the pressure plate (6). 6. The combination device for cable protection and unit lifting prevention for a submersible electric pump according to claim 3, characterized in that, between the pressure plate (6), the sealing seat (4) and the well cover (8), there are provided Gasket (7). 7. The combined device for cable protection and unit lifting prevention for a submersible electric pump according to claim 3, characterized in that, between the upper flange (30) and the sealing flange (11), an outlet pipe seal is provided pad (10). 8. a kind of submersible electric pump cable protection according to claim 1 and unit anti-lifting combination device, is characterized in that, the installation step of this combination device is: Step 1. The top outlet end of the submersible electric pump (18) is fixedly connected to the cable sealing tube (21). First, insert the top outlet end of the submersible electric pump (18) into the second cylinder (26) and the conical tube (27), and It is fixed by the lower flange (25), and the submersible electric pump (18) is lifted by the lifting lug, and then the submersible electric pump (18) is seated on the wellbore seat ring (16); and the cable tube (28) is passed through the sealing flange (11), the outlet pipe gasket (10), the second bolt (13) and the upper flange (30) are connected with the combination mechanism (22); Step 2: Install the manhole cover (8) on the main wellbore (23), then fix the pressure plate (6) and the gasket (7) on the manhole cover (8), and set the anti-lifting pressure ring on the second bolt (13). (9), then press and lock the submersible electric pump (18) through the screw (5); Step 2: Install the gasket (7) and the sealing seat (4) on the pressing plate (6), and seal the pressing ring (3) and the sealing tube (1) with the O-ring (2) with the three bolts (14). Press down.

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