Motor shell made of steel tube and used for electric submersible pump

Abstract

A steel-pipe motor casing for an electric submersible pump relates to the field of electromechanical equipment accessories and comprises a steel pipe, and a thick-wall section is arranged on the upper portion of the steel pipe in a hot forging and pressing mode. And an assembly flange is embedded in the lower part of the steel pipe. According to the electric submersible pump shell, various problems existing in the electric submersible pump shell in the prior art are solved, low-cost manufacturing of the electric submersible pump shell is achieved, and particularly under the condition that the manufacturing cost is lower, the use intensity of equipment is higher, the waterproof performance is better, and the market popularization value is higher.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of electromechanical equipment accessories, especially to a steel pipe motor shell for electric submersible pump. BACKGROUND

[0002] Electric submersible pump is widely used, such as specific operation of farmland irrigation will use electric submersible pump. The shell of the electric submersible pump in the prior art mainly has two forms, one is an integral casting, which has the disadvantages of thick shell wall, large material and weight, and low strength. Especially, the casting inevitably has casting defects such as air hole and sand eye.

[0003] In view of the problem, Chinese patent CN200910025263 discloses a small electric submersible pump with a motor shell as a welded part. This shell setting form is another widely used electric submersible pump shell sleeve in the prior art, but its disadvantages are also obvious. On the one hand, the upper and lower end rings at both ends of the steel pipe need to be welded, which greatly increases the welding cost. Secondly, and more importantly, the inner diameter of the upper and lower end rings is consistent with the inner diameter of the steel pipe, and the wall thickness of the upper and lower end rings is greater than that of the steel pipe. The welding position is between the outer wall surface of the steel pipe end and the upper or lower surface of the end ring part, the welding strength is low, and air holes are prone to occur. Especially for water operation equipment, water leakage is likely to occur after long-term use, which leads to poor heat dissipation of the equipment and causes damage to the equipment. UTILITY MODEL CONTENTS

[0004] The utility model aims at overcoming the deficiencies of the prior art, and provides a steel pipe motor shell for electric submersible pump, which has lower manufacturing cost, better waterproof performance and longer service life.

[0005] The device comprises a steel pipe, a thick-walled section is arranged on the upper part of the steel pipe by hot forging and stamping;

[0006] The effect achieved by this is that the upper part of the steel pipe is heated and forged and stamped, so that the upper part forms a thick wall, that is, the thick-walled section is thickened by hot forging and stamping of the thin-walled steel pipe, and the thickness for turning of the snap spring groove and the outer diameter required by the connecting piece are formed on the upper part

[0007] The lower part of the steel pipe is nested with an assembly flange.

[0008] That is, the steel pipe is thickened in the form of hot forging and stamping, forming a thickness for processing of the snap spring groove. The flange nested at the bottom can form a flat base surface at the bottom surface, facilitating subsequent assembly and construction, and greatly improving the waterproof performance of the equipment based on the assembly form.

[0009] The utility model discloses beneficial effect is: the utility model solves the various problems of electric submersible pump casing in prior art, realizes the low -cost manufacturing of electric submersimpling pump casing, especially under the condition of lower manufacturing cost, the use intensity of equipment is higher, and waterproof performance is more, also has market promotion value more. BRIEF DESCRIPTION OF DRAWINGS

[0010] Figure 1 It is a structural schematic diagram of the steel pipe motor casing for electric submersible pump.

[0011] Figure 2 It is the contrastive drawing of prior art implementation form.

[0012] Figure 3 It is the assembly structure schematic diagram based on Figure 1 .

[0013] Reference signs:

[0014] 1-steel pipe 11-thick wall section 12-reducing connecting section 2-assembly flange

[0015] The utility model discloses the realization, functional characteristics and advantages will be combined with embodiment, and further explanation is made with reference to the drawings. DETAILED DESCRIPTION

[0016] With reference to Figure 1 、 Figure 2 , the utility model discloses a steel pipe motor casing for electric submersible pump, including steel pipe 1, on the upper heat forging pressure of steel pipe 1 and set up thick wall section 11.

[0017] The effect realized is that the upper part of the steel pipe 1 is heated and forged after the heat forging stamping, so that the upper part forms a thick wall, that is, the thick wall section 11 is thickened after the heat forging stamping of the thin-wall steel pipe 1, and the thick wall section 11 with the thickness that can be turned and the outer diameter required by the connecting piece is formed on the upper part.

[0018] The lower part of the steel pipe 1 is nested with the assembly flange 2.

[0019] In implementation, the casing is thickened in the form of heat forging, and the thickness for the snap spring groove processing is formed. More specifically, in the prior art, in order to realize the thickness for the snap spring groove processing, a thick-walled end ring needs to be welded on the steel pipe 1. In the implementation of the present device, the upper part of the steel pipe 1 can be heated by using an electromagnetic heating coil, and the thick wall is formed in the form of forging. Compared with the two processes, the processing cost of the present device is lower, and the waterproof effect is better.

[0020] The flange nested at the bottom can form a flat base surface at the bottom surface, which is convenient for subsequent assembly and construction, and greatly improves the waterproof performance of the device based on the assembly form.

[0021] The steel pipe 1 is integrally provided with a variable-diameter connecting section 12 at the bottom thereof.

[0022] The effect achieved thereby is that one end of the integrally provided steel pipe 1 is formed with a thick wall by hot forging and pressing, and the other end is formed with a variable-diameter hole by punching, so as to be adapted to the assembly of the bearing seat.

[0023] In the embodiment 2, the variable-diameter connecting section 12 is welded with an assembly flange 2, and the outer annular surface of the bottom surface of the assembly flange 2 and the inner annular surface of the bottom surface of the variable-diameter connecting section 12 are both provided with bevels.

[0024] Further, the assembly flange 2 is an annular flange, and the assembly flange 2 is uniformly provided with assembly holes.

[0025] The effect achieved thereby is that the two bevels leave a welding space, so that the welding strength is higher, and after the high-strength welding is completed, the bottom surface of the machine shell can be low-cost leveled by turning; the assembly holes correspond to the assembly bolts of the bearing seat, and the assembly is performed.

[0026] In particular, the assembly flange 2 and the variable-diameter connecting section 12 at the lower part of the steel pipe 1 are provided in the above manner, so that on the basis of adapting to the bearing seat, the bottom surface of the assembly of the bearing seat and the steel pipe 1 is formed into a flat surface, and the bearing seat is adapted to the packaging, which greatly enhances the waterproof performance of the equipment, and even eliminates the possibility of water leakage from the bottom of the equipment.

[0027] The basic principle and main features of the present application and the advantages of the present application are shown and described above, and it is obvious for those skilled in the art that the present application is not limited to the details of the above exemplary embodiments, and the present application can be realized in other specific forms without departing from the spirit or basic characteristics of the present application. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting, and the scope of the present application is defined by the appended claims rather than the above description, and therefore all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application. Any reference signs in the claims should not be regarded as limiting and the claims.

[0028] In addition, it should be understood that although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description manner of the specification is only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be properly combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A motor housing for an electric submersible pump comprising a steel pipe, characterized in that: The thick wall section is arranged on the upper hot forging pressure of the steel pipe; The assembling flange is arranged in the lower inner nest of the steel pipe; The steel pipe is integrally arranged, and the reducing connecting section is arranged on the bottom of the steel pipe.

2. A steel tube motor housing for an electric submersible pump according to claim 1, characterized in that The assembling flange is welded in the reducing connecting section, and the outer annular surface of the bottom of the assembling flange and the inner annular surface of the bottom of the reducing connecting section are both arranged in bevel.

3. A steel tube motor housing for an electric submersible pump according to claim 1, characterized in that The assembling flange is annular flange, and the assembling holes are uniformly arranged on the assembling flange.

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