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

Abstract

The present invention discloses a combined device for cable protection and unit anti-lifting for a submersible electric pump, comprising a main wellbore, a well cover, a submersible electric pump, a cable sealing tube and a combined mechanism, wherein a submersible electric pump is arranged inside the main wellbore, a top outlet terminal of the submersible electric pump is fixedly connected with a cable sealing tube, a top of the cable sealing tube is fixedly connected with a combined mechanism, and a well cover is fixedly installed on the top of the main wellbore; the well cover is installed to fix a pressure plate and a sealing gasket on the well cover, an anti-lifting pressure ring is inserted and tightened by a screw to lock the submersible electric pump, so as to effectively prevent the submersible electric pump from lifting, rotating, tilting and the like; the cable sealing tube is arranged to isolate the direct contact between the conveying medium and the cable, and at the same time, the arrangement of the sealing gasket, the O-ring and the outlet pipe sealing gasket can effectively seal and prevent the external conveying medium from entering the cable sealing tube through the matching surface and the gap, so as to effectively protect the cable.

Description

Technical Field

[0001] The invention relates to the technical field of submersible electric pumps, and in particular to a cable protection and unit lift prevention combined device for a submersible electric pump. Background Art

[0002] Submersible electric pumps are widely used in industrial and agricultural production, mining, urban construction and other fields, mainly used for drainage, irrigation, landscaping, source water lifting, river management, etc.

[0003] Submersible electric pumps are often installed in a wellbore for easy inspection and maintenance. Typical wellbore installation methods include steel wellbore and cement wellbore. In actual use, submersible electric pumps often cause the submersible electric pump unit to lift, rotate, and tilt due to the reverse torque generated by the start-up of the water pump or the reverse water thrust generated by the reverse rotation of the water pump, which causes the submersible motor cable to churn, and finally the cable is damaged or broken, causing the submersible electric pump unit to fail to operate, or the submersible electric pump unit is tilted, causing the unit to vibrate and other operating failures; at the same time, since the submersible electric pump is installed in the wellbore, the cable is in contact with the conveying medium, and the cable will be worn due to long-term scouring or impact by foreign objects. Finally, after the surface of the cable is damaged, water will enter the cable from the damaged part, and flow into the motor cavity through the gap between the cable core wires, causing the motor water inlet alarm to fail to operate or the stator to burn out, a major quality accident. Summary of the invention

[0004] In order to overcome the above technical problems, the purpose of the present invention is to provide a submersible electric pump cable protection and unit anti-lifting combined device, aiming at the existing wellbore-mounted submersible electric pumps. During use, the motor cable of the submersible electric pump is in contact with the conveying medium, and the cable is long-term scouring or impacted by foreign objects, which will cause cable wear. The reverse torque generated by the start-up of the submersible electric pump unit or the reverse water thrust generated by the reverse rotation of the water pump is prone to pump body rotation or tilting, resulting in accidents such as unstable operation or failure of the unit. The present invention patent invents a submersible electric pump cable protection and unit anti-lifting combined device, which can effectively prevent the submersible electric pump unit from lifting, rotating, tilting, cable wear and other failures during the operation of the submersible electric pump.

[0005] The purpose of the present invention can be achieved through the following technical solutions:

[0006] A submersible electric pump cable protection and unit lift prevention combined device, comprising a main wellbore, a well cover, a submersible electric pump, a cable sealing tube, and a combined mechanism, wherein a submersible electric pump is arranged inside the main wellbore, a cable sealing tube is fixedly connected to the top outlet of the submersible electric pump, a combined mechanism is fixedly connected to the top of the cable sealing tube, a well cover is fixedly installed on the top of the main wellbore, and the well cover is fixedly connected to the combined mechanism;

[0007] The main wellbore includes 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; a foundation flange and a reinforcing rib plate are welded and fixed to the outside of the cylinder body 1, and the foundation flange is located above the reinforcing rib plate; a side wellbore is fixedly installed on one side of the cylinder body 1.

[0008] As a further solution of the present invention: the cable sealing tube includes a cable tube, both ends of the top of the cable tube are fixedly installed with hanging plates, the top of the cable tube is installed with an upper flange, the bottom of the cable tube is fixedly installed with a cone tube, the bottom of the cone tube is fixedly installed with a cylinder body 2, the bottom of the cylinder body 2 is fixedly installed with a lower flange, the lower flange is fixedly connected to the flange on the submersible electric pump, and the top outlet end of the submersible electric pump is inserted into the cylinder body 2 and the cone tube.

[0009] As a further scheme of the present invention: the combined mechanism includes a sealing tube, a pressure ring, a sealing seat, a pressure plate, a sealing flange, bolt one, bolt two, and bolt three; a pressure plate is fixedly installed on the manhole cover, a sealing seat is fixedly connected to the top of the pressure plate by bolt one, the sealing seat is a Z-shaped structure, a pressure ring is fixedly connected to the top of the sealing seat by bolt three; a bolt two is vertically arranged on the pressure plate near one end of the sealing tube; a sealing flange is installed at the lower end of the sealing tube, the sealing flange is connected to the upper flange by bolt two, the bolt two is locked by a screw, 4-6 screws are arranged in a circle, respectively located above the sealing flange and the pressure plate, the screws press the anti-lifting machine pressure plate through the screw holes on the pressure plate, and then the screws are locked with nuts to prevent loosening.

[0010] As a further solution of the present invention: an O-ring is arranged between the sealing seat and the pressure ring.

[0011] 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 below the pressure plate.

[0012] As a further solution of the present invention: sealing gaskets are arranged between the pressure plate, the sealing seat and the manhole cover.

[0013] As a further solution of the present invention: an outlet pipe sealing gasket is arranged between the upper flange and the sealing flange.

[0014] As a further solution of the present invention: the installation steps of the combined device are:

[0015] Step 1: The top outlet of the submersible electric pump is fixedly connected with the cable sealing tube. First, insert the top outlet of the submersible electric pump into the second cylinder and the cone tube, and fix it through the lower flange, and lift the submersible electric pump through the lifting lug, and then place the submersible electric pump on the wellbore seat ring. The seat ring adopts a 60° cone angle. The submersible electric pump uses its own gravity to sit on the seat ring, which has the functions of automatic centering and stabilizing the pump body; and connect the cable tube to the combined mechanism through the sealing flange, the outlet tube sealing gasket, the second bolt and the upper flange;

[0016] Step 2: Install the manhole cover on the main wellbore, then fix the pressure plate and the sealing gasket on the manhole cover, insert the anti-lifting pressure ring on the bolt 2, and then tighten and lock the submersible electric pump through the screw;

[0017] Step 2: Install the sealing gasket and the sealing seat on the pressure plate, and use bolt 3 to seal and tighten the pressure ring and the sealing tube through the O-ring.

[0018] Beneficial effects of the present invention: the upper outlet part of the submersible electric pump of the present invention is fastened and connected with the cable sealing tube by bolts, firstly, the outlet end of the top of the submersible electric pump is inserted into the second barrel and the cone tube, and fixed by the lower flange, and the submersible electric pump is lifted by the lifting lug, and then the submersible electric pump is seated on the wellbore seat ring, the seat ring adopts a 60° cone angle, and the submersible electric pump uses its own gravity to sit on the seat ring, which has the functions of automatic centering and stabilizing the pump body; the matching part between the guide vane body of the submersible electric pump and the seat ring is also designed to have a 60° cone angle and is equipped with a sealing ring, so that when the submersible electric pump is installed, the submersible electric pump and the seat ring are automatically centered and sealed by the 60° cone angle matching;

[0019] After the manhole cover is installed, the pressure plate and the sealing gasket are fixed on the manhole cover, and the anti-lifting pressure ring is inserted and tightened by the screw to lock the submersible electric pump, which can effectively prevent the submersible electric pump from lifting, rotating, tilting, etc.

[0020] The cable sealing tube is set to isolate the direct contact between the transmission medium and the cable. At the same time, the setting of the sealing gasket, O-ring and outlet tube sealing gasket can effectively seal and prevent the external transmission medium from entering the cable sealing tube through the matching surface and gap, thereby effectively protecting the cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention will be further described below in conjunction with the accompanying drawings.

[0022] Figure 1 It is a schematic diagram of the overall structure of a cable protection and unit lift prevention combined device for a submersible electric pump of the present invention;

[0023] Figure 2 It is a schematic diagram of the internal structure of the cable sealing tube in the present invention;

[0024] Figure 3 It is a schematic diagram of the internal structure of the combined mechanism in the present invention.

[0025] In the figure: 1. Sealing tube; 2. O-ring; 3. Pressure ring; 4. Sealing seat; 5. Screw; 6. Pressure plate; 7. Sealing gasket; 8. Manhole cover; 9. Anti-lifting pressure ring; 10. Outlet pipe sealing gasket; 11. Sealing flange; 12. Bolt one; 13. Bolt two; 14. Bolt three; 16. Sealing ring; 17. Cylinder one; 18. Submersible electric pump; 19. Foundation flange; 20. Reinforcement rib plate; 21. Cable sealing tube; 22. Combined mechanism; 23. Main shaft; 24. Side shaft; 25. Lower flange; 26. Cylinder two; 27. Conical tube; 28. Cable pipe; 29. ​​Hanging plate; 30. Upper flange. DETAILED DESCRIPTION

[0026] 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 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 are within the scope of protection of the present invention.

[0027] See also Figure 1-3 As shown, a submersible electric pump cable protection and unit lift prevention combined device comprises a main wellbore 23, a well cover 8, a submersible electric pump 18, a cable sealing tube 21, and a combined mechanism 22. The submersible electric pump 18 is arranged inside the main wellbore 23, the top outlet end of the submersible electric pump 18 is fixedly connected with a cable sealing tube 21, the top of the cable sealing tube 21 is fixedly connected with a combined mechanism 22, the top of the main wellbore 23 is fixedly installed with a well cover 8, and the well cover 8 is fixedly connected to the combined mechanism 22;

[0028] The main shaft 23 includes a cylinder body 17, a seat ring 16 is welded and fixed at the bottom of the cylinder body 17, the seat ring 16 adopts a 60° cone angle, a submersible electric pump 18 is placed on the seat ring 16, and the submersible electric pump 18 sits on the seat ring 16 by its own gravity, and has the functions of automatic centering and stabilizing the pump body; a basic flange 19 and a reinforcing rib plate 20 are welded and fixed on the outside of the cylinder body 17, and the basic flange 19 is located above the reinforcing rib plate 20; a side shaft 24 is fixedly installed on one side of the cylinder body 17.

[0029] The cable sealing tube 21 includes a cable tube 28, both ends of the top of the cable tube 28 are fixedly installed with hanging plates 29, the top of the cable tube 28 is installed with an upper flange 30, the bottom of the cable tube 28 is fixedly installed with a cone tube 27, the bottom of the cone tube 27 is fixedly installed with a cylinder 26, the bottom of the cylinder 26 is fixedly installed with a lower flange 25, the lower flange 25 is fixedly connected to the flange on the submersible electric pump 18, and the top outlet end of the submersible electric pump 18 is inserted into the cylinder 26 and the cone tube 27.

[0030] The combined mechanism 22 includes a sealing tube 1, a pressure ring 3, a sealing seat 4, a pressure plate 6, a sealing flange 11, a bolt 12, a bolt 2 13, and a bolt 3 14. The pressure plate 6 is fixedly installed on the manhole cover 8, and the sealing seat 4 is fixedly connected to the pressure plate 6 above by a bolt 12. The sealing seat 4 is a Z-shaped structure, and the pressure ring 3 is fixedly connected to the sealing seat 4 above by a bolt 3 14; the pressure plate 6 is vertically provided with a bolt 2 13 near one end of the sealing tube 1; the sealing tube 1 is provided with a sealing flange 11 at the lower end, and the sealing flange 11 is connected to the upper flange 30 by a bolt 2 13, and the bolt 2 13 is locked by a screw 5. There are 4-6 screws 5 arranged in a circle, which are respectively located above the sealing flange 11 and the pressure plate 6, and the screws 5 press the anti-lifting machine pressure plate 9 through the screw holes on the pressure plate 6, and then the screws 5 are locked with nuts to prevent loosening.

[0031] An O-ring 2 is provided between the sealing seat 4 and the pressure ring 3 .

[0032] The second bolt 13 is sleeved with an anti-lifting pressure ring 9 , and the anti-lifting pressure ring 9 is located below the pressure plate 6 .

[0033] Sealing gaskets 7 are arranged between the pressure plate 6 , the sealing seat 4 and the manhole cover 8 .

[0034] An outlet pipe sealing gasket 10 is arranged between the upper flange 30 and the sealing flange 11 .

[0035] The installation steps of the combined device are:

[0036] Step 1: The top outlet of the submersible electric pump 18 is fixedly connected to the cable sealing tube 21. First, the top outlet of the submersible electric pump 18 is inserted into the second barrel 26 and the cone tube 27, and 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. The submersible electric pump 18 uses its own gravity to sit on the seat ring 16, which has the functions of automatic centering and stabilizing the pump body; and the cable tube 28 is connected to the combination mechanism 22 through the sealing flange 11, the outlet tube sealing gasket 10, the second bolt 13 and the upper flange 30;

[0037] Step 2: Install the manhole cover 8 on the main shaft 23, then fix the pressure plate 6 and the sealing gasket 7 on the manhole cover 8, insert the anti-lifting pressure ring 9 on the bolt 13, and then tighten and lock the submersible electric pump 18 through the screw 5;

[0038] Step 2: Install the sealing gasket 7 and the sealing seat 4 on the pressure plate 6, and use bolts 14 to seal and tighten the pressure ring 3 and the sealing tube 1 through the O-ring 2.

[0039] The working principle of the present invention is as follows: 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 barrel 26 and the cone tube 27, and 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. The submersible electric pump 18 uses its own gravity to sit on the seat ring 16, which has the functions of automatic centering and stabilizing the pump body. The matching part between the guide vane body of the submersible electric pump and the seat ring is also designed to have a 60° cone angle and is equipped with a sealing ring. In this way, when the submersible electric pump is installed, the submersible electric pump and the seat ring are automatically centered and sealed by matching the 60° cone angle; and the cable tube 28 is connected to the combination mechanism 22 through the sealing flange 11, the outlet pipe sealing pad 10, the bolt 13 and the upper flange 30;

[0040] Install the manhole cover 8 on the main shaft 23, then fix the pressure plate 6 and the sealing gasket 7 on the manhole cover 8, insert the anti-lifting pressure ring 9 on the bolt 2 13, and then press and lock the submersible electric pump 18 through the screw 5, which can effectively prevent the submersible electric 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 bolt 3 14 to seal and press the pressure ring 3 and the sealing tube 1 through the O-ring 2;

[0041] The cable sealing tube 21 is configured to isolate the direct contact between the transmission medium and the cable. At the same time, the configuration of the sealing gasket 7, the O-ring 2 and the outlet pipe sealing gasket 10 can effectively seal and prevent the external transmission medium from entering the cable sealing tube 21 through the matching surface and the gap, thereby effectively protecting the cable.

[0042] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0043] The above contents are merely examples and explanations of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the invention or exceed the scope defined by the claims, they shall all fall within the protection scope of the present invention.

Claims

1. A combined device for cable protection and unit lifting prevention for a submersible electric pump, characterized in that: It includes a main wellbore, a well cover, a submersible electric pump, a cable sealing tube, and a combined mechanism. A submersible electric pump is arranged inside the main wellbore. The top outlet of the submersible electric pump is fixedly connected with a cable sealing tube. The top of the cable sealing tube is fixedly connected with the combined mechanism. A well cover is fixedly installed on the top of the main wellbore, and the well cover is fixedly connected with the combined mechanism. The main wellbore includes a cylinder body 1, a seat ring is welded and fixed at the bottom of the cylinder body 1, and a submersible electric pump is placed on the seat ring; a foundation flange and a reinforcing rib plate are welded and fixed on the outside of the cylinder body 1, and the foundation flange is located above the reinforcing rib plate; a side wellbore is fixedly installed on one side of the cylinder body 1; The cable sealing tube comprises a cable tube, both ends of the top of the cable tube are fixedly installed with hanging plates, the top of the cable tube is installed with an upper flange, the bottom of the cable tube is fixedly installed with a cone tube, the bottom of the cone tube is fixedly installed with a 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, and the top outlet end of the submersible electric pump is inserted into the second cylinder and the cone tube; The combined mechanism includes a sealing tube, a pressure ring, a sealing seat, a pressure plate, a sealing flange, bolt 1, bolt 2, and bolt 3. A pressure plate is fixedly installed on the manhole cover, and a sealing seat is fixedly connected to the pressure plate through bolt 1. The sealing seat is a Z-shaped structure, and a pressure ring is fixedly connected to the sealing seat through bolt 3. Bolt 2 is vertically arranged on the pressure plate near one end of the sealing tube. A sealing flange is installed at the lower end of the sealing tube, and the sealing flange is connected to the upper flange through bolt 2. Bolt 2 is locked by a screw. There are 4-6 screws arranged in a circle, which are respectively located above the sealing flange and the pressure plate. An O-type sealing ring is arranged between the sealing seat and the pressure ring; An anti-lifting pressure ring is sleeved on the second bolt, and the anti-lifting pressure ring is located below the pressure plate; Sealing pads are provided between the pressure plate, the sealing seat and the manhole cover; An outlet pipe sealing gasket is arranged between the upper flange and the sealing flange.

2. A submersible electric pump cable protection and unit lift prevention combined device according to claim 1, characterized in that: The installation steps of the combined device are: Step 1: The top outlet of the submersible pump is fixedly connected to the cable sealing tube. First, insert the top outlet of the submersible pump into the second cylinder and the cone tube, and fix it through the lower flange, and lift the submersible pump through the lifting lug, and then place the submersible pump on the wellbore seat ring; and connect the cable tube to the combined mechanism through the sealing flange, the outlet tube sealing gasket, the second bolt and the upper flange; Step 2: Install the manhole cover on the main wellbore, then fix the pressure plate and the sealing gasket on the manhole cover, insert the anti-lifting pressure ring on the bolt 2, and then tighten and lock the submersible electric pump through the screw; Step 2: Install the sealing gasket and the sealing seat on the pressure plate, and use bolt 3 to seal and tighten the pressure ring and the sealing tube through the O-ring.

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