CN210829715U - Universal joint protection device of screw pump and screw pump - Google Patents

Abstract

The utility model relates to a universal joint protection device of a screw pump and the screw pump, which comprises a universal joint arranged on a transmission shaft, wherein the universal joint is provided with a flexible protective sleeve for wrapping the universal joint; two ends of the protective sleeve protrude inwards to form annular sealing bulges which are arranged in the matched sealing grooves on the universal joint; the surface of the sealing bulge facing the inner side of the protective sleeve is an inclined surface; the inclined plane inclines outwards to the protective sleeve. Adopt the technical scheme of the utility model, through setting up the protective sheath with the universal joint parcel, keep apart the universal joint, can prevent that the grit in the screw pump from getting into the universal joint and wearing and tearing it. In the process of pressing the protective sleeve, the inclined plane on the sealing bulge is pressed, and the sealing bulge deforms towards the two ends of the protective sleeve, so that the whole sealing bulge is tightly attached to the side wall of the sealing groove, slurry in the screw pump can be prevented from entering the universal joint, the universal joint is prevented from being corroded by the slurry, and the service life of the universal joint is prolonged. And the lubricating oil in the universal joint can be avoided revealing by the protective sleeve, and the leakproofness is good.

Description

Universal joint protection device of screw pump and screw pump

Technical Field

The utility model relates to a screw pump field, concretely relates to universal joint protection device and screw pump of screw pump.

Background

When the screw pump operates, the motor shaft drives the rotor to rotate in the stator, and stress in multiple directions can be generated. However, the traditional pin shaft connection can only eliminate stress in 4 directions, so that universal joints are introduced into the screw pump to eliminate stress in any direction.

However, the existing universal joint is usually directly and naked on the screw pump, the universal joint is directly contacted with cement or sand in the screw pump, and the universal joint is easy to wear when the screw pump works; and the universal joint is easily corroded by slurry in the screw pump, and the service life is short.

Disclosure of Invention

For solving prior art, because of the universal joint is corroded by grit, the thick liquid wearing and tearing even in the screw pump easily, lead to the short problem of universal joint life, the utility model provides a rubber sleeve is established through the cover on the universal joint to the universal joint protection device of screw pump, with the universal joint with grit in the screw pump, thick liquid isolated, avoid the universal joint to be worn and torn or corrode, can prolong the life of universal joint.

In order to achieve the purpose, the utility model adopts the technical proposal that:

a universal joint protection device of a screw pump comprises a universal joint arranged on a transmission shaft, wherein a flexible protection sleeve for wrapping the universal joint is arranged on the universal joint; two ends of the protective sleeve protrude inwards to form annular sealing bulges which are arranged in the matched sealing grooves on the universal joint; the surface of the sealing bulge facing the inner side of the protective sleeve is an inclined surface; the inclined plane inclines outwards to the protective sleeve.

Adopt the technical scheme of the utility model, through setting up the protective sheath with the universal joint parcel, keep apart the universal joint, can prevent that the grit in the screw pump from getting into the universal joint and wearing and tearing it. In the process of pressing the protective sleeve, the inclined plane on the sealing bulge is pressed, and the sealing bulge deforms towards the two ends of the protective sleeve, so that the whole sealing bulge is tightly attached to the side wall of the sealing groove, slurry in the screw pump can be prevented from entering the universal joint, the universal joint is prevented from being corroded by the slurry, and the service life of the universal joint is prolonged. And the lubricating oil in the universal joint can be avoided revealing by the protective sleeve, and the leakproofness is good.

Preferably, the outer side of the protective sleeve is provided with a clamping groove corresponding to the sealing bulge for fixing the protective sleeve.

Guarantee at the in-process of fixed protective sheath, the sealed arch of protective sheath inboard can the compressive deformation, makes sealed arch hug closely on the lateral wall of seal groove.

Preferably, the clamping groove is internally provided with a hoop for hooping the protective sleeve.

The protective sleeve is fixed through the hoop, and the installation is convenient and rapid.

Preferably, the material of the protective sleeve is rubber. The rubber has elasticity and is waterproof and air, and can effectively isolate the universal shaft.

Preferably, the cross section of the sealing bulge is in a right-angled trapezoid shape; the vertical side wall of the sealing bulge faces the outer side of the protective sleeve.

Because the surface of the sealing bulge clinging to the sealing groove is a vertical surface, the sealing bulge can be firmly clinged.

Preferably, the universal joint of the screw pump comprises the universal joint protection device of the screw pump.

The utility model has the advantages that the materials such as sand stone, slurry and the like in the screw pump can be prevented from entering the universal joint, the universal joint is not easy to wear and corrode, and the service life is long; lubricating oil leakage can be avoided, and the airtightness is good; the installation is convenient and fast.

Drawings

FIG. 1 is a cross-sectional view of a boot mounted on a gimbal.

Fig. 2 is a schematic structural view of the protective sheath.

The reference numerals and components referred to in the drawings are as follows:

the universal joint comprises a universal joint 1, a protective sleeve 2, a sealing bulge 3, an inclined plane 4, a sealing groove 5, a clamping groove 6 and a hoop 7.

Detailed Description

In order to make the technical means, creation features, achievement purposes and functions of the present invention easy to understand and understand, the present invention is further explained by combining with the specific drawings.

As shown in fig. 1, a screw pump includes a universal joint 1 disposed on a transmission shaft, and a flexible protective sleeve 2 for wrapping the universal joint 1 is disposed on the universal joint 1; two ends of the protective sleeve 2 protrude inwards to form annular sealing bulges 3 which are arranged in a matched sealing groove 5 on the universal joint 1; the surface of the sealing bulge 3 facing the inner side of the protective sleeve 2 is an inclined surface 4; the bevel 4 is inclined outward of the protective sheath 2.

As shown in fig. 2, in order to ensure that the sealing protrusion 3 can deform under pressure during fixing the protective sheath 2, a clamping groove 6 corresponding to the sealing protrusion 3 is formed in the outer side of the protective sheath 2 for fixing the protective sheath 2. Because staple bolt 7 is with low costs, convenient to use, it is fixed firm, staple bolt 7 that cramping protective sheath 2 was used is equipped with in the draw-in groove 6.

In this embodiment, the material of the protective sheath 2 is preferably rubber with good elasticity and corrosion resistance. The cross section of the sealing bulge 3 is in a right-angled trapezoid shape; the vertical side walls constituting the right-angled waist are directed towards the outside of the protective sheath 2.

The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only illustrative of the principles of the present invention, and that other variations and modifications may be made without departing from the spirit and scope of the invention, and the scope of the invention is to be protected by the following claims. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (6)

1. A universal joint protection device of a screw pump comprises a universal joint (1) arranged on a transmission shaft, and is characterized in that a flexible protective sleeve (2) for wrapping the universal joint (1) is arranged on the universal joint; two ends of the protective sleeve (2) protrude inwards to form annular sealing bulges (3) which are arranged in a matched sealing groove (5) on the universal joint (1); one surface of the sealing bulge (3) facing the inner side of the protective sleeve (2) is an inclined surface (4); the inclined plane (4) inclines outwards from the protective sleeve (2).

2. A universal joint protector for a screw pump according to claim 1, in which: the outside of protective sheath (2) is seted up and is sealed draw-in groove (6) that arch (3) correspond for fixed protective sheath (2).

3. A universal joint protector for a screw pump according to claim 2, in which: and a hoop (7) for hooping the protective sleeve (2) is arranged in the clamping groove (6).

4. A universal joint protector for a screw pump according to any one of claims 1 to 3, wherein: the protective sleeve (2) is made of rubber.

5. A universal joint protector for a screw pump according to claim 4, in which: the cross section of the sealing bulge (3) is in a right-angle trapezoid shape; the vertical side wall of the sealing bulge (3) faces the outer side of the protective sleeve (2).

6. A screw pump, its characterized in that: a joint protector comprising a screw pump according to claims 1 to 5.

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