CN215980119U

CN215980119U - Catalyst returning pump

Info

Publication number: CN215980119U
Application number: CN202122615759.9U
Authority: CN
Inventors: 豆浩然; 何兴锋; 何明军; 谷长辉; 李文焕; 和明辉; 宋海霞
Original assignee: Hebei Jiantao Energy Development Co ltd
Current assignee: Hebei Jiantao Energy Development Co ltd
Priority date: 2021-10-28
Filing date: 2021-10-28
Publication date: 2022-03-08
Anticipated expiration: 2031-10-28

Abstract

The utility model discloses a catalyst return pump which comprises a pump body with openings at two ends, wherein the openings at two ends of the pump body are respectively connected with pump covers, each pump cover is rotatably connected with a pump shaft, the pump shaft is connected with an impeller, the impeller is positioned in the pump body, and a sealing element is arranged between each pump cover and the pump body. The utility model has simple structure and strong sealing performance, ensures the long-period stable use of the catalyst return pump, reduces the maintenance cost and the labor intensity, and is suitable for liquid delivery.

Description

Catalyst returning pump

Technical Field

The utility model belongs to the technical field of liquid conveying equipment, and particularly relates to a catalyst return pump.

Background

In the chemical industry, various pumps are applied to conveying various chemical materials, and particularly centrifugal pumps are widely applied. In the acetic acid industry, due to the particularity of catalyst materials, the material, pressure and flow of a catalyst return pump have high requirements. However, due to the design of the equipment and the corrosion of materials, the catalyst return pump has high pressure and low pressure in the using process, so that the flow and pressure of the catalyst circulation pump are reduced, and the production requirement cannot be met. For this reason, the outlet pressure and flow rate are increased by increasing the pump speed, but as the pump speed approaches the limit, the pump vibration also increases significantly, but the outlet pressure and flow rate of the pump do not increase substantially.

To above problem, disassembled, contrasted and surveyed the A/B pump respectively, the assembly clearance grow between discovery pump cover and the pump body. The pump cover is obviously scoured and corroded to cause defects, and the defects can cause a large amount of leakage from a high-pressure area of the pump to a low-pressure area of the pump. The high pressure train is low, causing the pump to perform useless work, resulting in a low outlet pressure and flow rate of the pump.

Aiming at the problem of the leakage of a high-pressure area of the pump to a low-pressure area of the pump, the engineering part adopts the same material build-up welding to the corrosion defect part of the pump cover, the build-up welding is finished and then processed according to the original size by a lathe, the build-up welding is assembled and used after being processed, and the outlet pressure and the flow of the pump are both restored to the original state under the same rotating speed. However, after one year, the outlet pressure becomes low and the flow rate becomes insufficient, and the repair and use are repeated for about 1 year. This is not only disadvantageous for long-term stable production, but also brings about high maintenance costs. The same problem is repeated, and the pump cover and the pump body need to have proper assembly clearance due to the assembly requirement. The existence of the gap inevitably causes the high-pressure area of the pump to leak to the low-pressure area of the pump; and after the pump cover is corroded by scouring to cause defects, the material of the surfacing welding is slightly different from the original material of the pump cover, so that the scouring corrosion speed of the surfacing welding part is accelerated, and the pump cover needs to be repaired after being used for about one year.

SUMMERY OF THE UTILITY MODEL

The utility model solves the problem that the assembly gap between the pump body and the pump cover causes the channeling of a high-pressure area to a low-pressure area of the pump, and provides the catalyst return pump with simple structure and strong sealing property.

In order to achieve the purpose, the technical scheme adopted by the utility model is as follows:

the catalyst return pump comprises a pump body with openings at two ends, wherein the openings at two ends of the pump body are respectively connected with pump covers, each pump cover is rotatably connected with a pump shaft, the pump shafts are connected with impellers, the impellers are located in the pump body, and sealing elements are arranged between each pump cover and the pump body.

As the limitation, the opening of the pump body is in a trapezoidal conical shape, a boss is arranged on the end, close to the pump body, of the pump cover, and the boss is matched with the opening of the pump body.

As another limitation, the boss is provided with a first annular groove, and the sealing element is clamped in the first annular groove.

As another limitation, a second annular groove is formed in an opening of the pump body, and the sealing element is clamped in the second annular groove.

As another definition, the second annular groove is adjacent the open lower end of the pump body, and the lower end of the seal is in a plane with the open lower end of the pump body when the seal is in the service position.

As another limitation, the seal is a rubber seal ring.

As another limitation, the pump cover and the pump body are connected through a plurality of bolts, the bolts are uniformly arranged along the circumferential direction of the pump cover at intervals, and gaskets are respectively arranged between the bolts and the pump cover.

As another definition, the shim is a spring shim.

As another limitation, a rubber sealing strip is arranged between the pump cover and the pump body.

As another limitation, the sealing element is a rubber sleeve, the rubber sleeve is slightly smaller than the boss, and the thickness of the rubber sleeve is slightly larger than a gap between the opening of the pump body and the boss of the pump cover.

Compared with the prior art, the utility model has the technical progress that:

the pump body is provided with openings at two ends, the openings at two ends of the pump body are respectively connected with pump covers, each pump cover is rotatably connected with a pump shaft, the pump shaft is connected with an impeller, the impeller is positioned in the pump body, and a sealing element is arranged between each pump cover and the pump body; the sealing element seals an assembly gap between the pump body and the pump cover, so that the pump cover is prevented from being scoured and corroded due to liquid leakage, the pump cover is free from overshooting corrosion after nearly 4 years of use verification of the enterprise, the long-period stable use of the catalyst return pump is ensured, and the maintenance cost and the labor intensity are reduced; in conclusion, the utility model has simple structure and strong sealing performance, ensures the long-period stable use of the catalyst return pump, reduces the maintenance cost and the labor intensity, and is suitable for liquid conveying.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the principles of the utility model and not to limit the utility model.

In the drawings:

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a longitudinal cross-sectional view of a pump body according to an embodiment of the present invention;

FIG. 3 is a longitudinal cross-sectional view of a pump body and seal according to an embodiment of the present invention;

FIG. 4 is a schematic structural view of a pump cover according to an embodiment of the present invention;

FIG. 5 is a schematic diagram of a pump cap and seal configuration according to an embodiment of the present invention;

FIG. 6 is a schematic diagram of a seal according to an embodiment of the present invention;

FIG. 7 is a schematic structural view of a rubber weather strip according to an embodiment of the present invention;

FIG. 8 is a schematic structural diagram of a gasket according to an embodiment of the present invention;

FIG. 9 is another schematic view of a seal according to an embodiment of the present invention;

FIG. 10 is a schematic view of a connection structure of a pump body, a seal and a pump cover according to an embodiment of the utility model.

Labeling components: the pump comprises a pump body 1, a second annular groove 101, a pump cover 2, a boss 201, a first annular groove 202, a pump shaft 3, a rubber sealing strip 4, a sealing element 5, a bolt 6 and a gasket 7.

Detailed Description

Preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for purposes of illustration and explanation only and are not intended to limit the present invention.

Embodiment a catalyst material returning pump

The embodiment discloses a catalyst return pump, as shown in fig. 1 and 2, the catalyst return pump comprises a pump body 1, openings are formed in two ends of the pump body 1, the openings in the two ends of the pump body 1 are respectively connected with a pump cover 2 through bolts, a sealing element 5 is arranged between the pump body 1 and the pump cover 2, the sealing element 5 improves the sealing property between the pump body 1 and the pump cover 2, prevents high-pressure liquid flow from streaming to a low-pressure area through a gap between the pump body 1 and the pump cover 2, causes abrasion of the pump cover 2 to increase the gap, and reduces the service life; the sealing element 5 is preferably a rubber sealing ring, and the arrangement technology is mature, low in cost and good in sealing effect; preferably, a plurality of bolts 6 are arranged, the bolts 6 are uniformly arranged along the circumferential direction of the pump cover 2 at intervals, and the arrangement ensures that the stress between the pump cover 2 and the pump body 1 is balanced, so that the sealing performance between the pump cover 2 and the pump body 1 is improved; a pump shaft 3 is rotatably connected between the two pump covers 2, the pump shaft 3 is fixedly connected with an impeller, and the impeller is positioned in the pump body 1; when the pump is used, the pump shaft 3 rotates to drive the impeller to rotate, the impeller rotates to enable liquid flow in the pump body 1 to be changed into high-pressure liquid flow to flow out of an outlet of the pump body 1, the high-pressure liquid flow in the pump body 1 can impact a gap between the pump cover 2 and the pump body 1, and the rubber sealing ring is arranged in the gap between the pump cover 2 and the pump body 1 and forms sealing for the gap between the pump cover 2 and the pump body 1 under the extrusion between the pump cover 2 and the pump body 1, so that the liquid flow formed by the high-pressure liquid flow through the gap is avoided, the integrity of the pump cover 2 is ensured, and the service life of the pump cover 2 is prolonged; the advantage of this embodiment lies in that, adopts above-mentioned setting, simple structure, and the leakproofness is strong, has guaranteed the long period stable use of catalyst return pump, has reduced maintenance cost and intensity of labour.

A preferable structure of the pump body 1 of this embodiment is, as shown in fig. 1 and fig. 3, an opening of the pump body 1 is arranged in a conical shape, a boss 201 is arranged at an end of the pump cover 2 close to the pump body 1, the pump cover 2 and the boss 201 are integrally formed, and the boss 201 is adapted to the opening of the pump body 1, so that when the sealing effect of the sealing element 5 is achieved, the sealing element 5 is arranged in an oblique manner, which can prevent high-pressure liquid flow from directly impacting the sealing element 5, and the oblique arrangement gradually reduces the impact force of the high-pressure liquid flow, thereby improving the sealing effect of the sealing element 5; the opening of the pump body 1 is provided with a second annular groove 101 through a machine tool, preferably, the second annular groove 101 is close to the lower end of the opening of the pump body 1, and the sealing element 5 is clamped in the second annular groove 101, so that the stability of the sealing element 5 is improved, the sealing effect is improved, and the reduction of the sealing effect caused by the movement of the sealing element 5 when the pump cover 2 and the pump body 1 are installed is avoided; preferably, when the sealing element 5 is positioned at a working station, the lower end of the sealing element 5 and the lower end of the opening of the pump body 1 are positioned in a plane, namely when the pump body 1, the pump cover 2 and the sealing element 5 are fixedly connected, the sealing element 5, the pump cover 2 and the lower end of the opening of the pump body 1 are flush, the arrangement enables the gap between the pump cover 2 and the pump body 1 to be filled by the sealing element 5, the gap between the pump cover 2 and the pump body 1 disappears, the impact of high-pressure liquid flow on the pump cover 2 is avoided, and the service life of the pump cover 2 is prolonged; the advantage of this embodiment lies in that with above-mentioned setting, has improved the leakproofness, has prolonged the life of catalyst return pump.

A preferred structure of the pump cover 2 of this embodiment is, as shown in fig. 4 and 5, a first annular groove 202 is formed on a boss 201 of the pump cover 2 by a machine tool, and the sealing member 5 is clamped in the first annular groove 202, so that the stability of the sealing member 5 is improved, the sealing effect is improved, and it is avoided that the sealing member 5 is deflected to reduce the sealing effect when the pump cover 2 is connected with the pump body 1, and therefore, the advantage of this embodiment is that the above arrangement is adopted, and the stability and the sealing effect of the sealing member 5 are improved.

A preferable structure for connection between the pump cover 2 and the pump body 1 in this embodiment is, as shown in fig. 1, fig. 6, fig. 7, and fig. 8, a rubber sealing strip 4 is provided between the pump cover 2 and the pump body 1, the rubber sealing strip 4 has good cushioning property and sealing property, and the rubber sealing strip 4 forms a good cushioning layer between the pump body 1 and the pump cover 2, so that the sealing property between the pump body 1 and the pump cover 2 is ensured; a gasket 7 is arranged between the bolt 6 and the pump cover 2, the gasket 7 is sleeved on the bolt 6, the bolt 6 sequentially penetrates through the gasket 7, the pump cover 2 and the rubber sealing strip 4 to be in threaded connection with the pump body 1, the arrangement enables the connection stability between the pump cover 2 and the pump body 1 to be increased, the sealing effect is improved, and the sealing effect reduction caused by the loosening of the bolt 6 in the working process of the catalyst return pump is avoided; the gasket 7 is preferably a spring gasket which has a certain buffering effect, so that the bolt 6 can be prevented from loosening, and the sealing effect is improved; the advantage of this embodiment is that with the above arrangement, the sealing performance is improved, and the service life of the pump cover 2 is prolonged.

A preferable structure of the sealing element 5 of this embodiment is, as shown in fig. 9 and 10, that the sealing element 5 is a rubber sleeve, the rubber sleeve is slightly smaller than the boss, the thickness of the rubber sleeve is slightly larger than the gap between the opening of the pump body 1 and the boss 201 of the pump cover 2, and the rubber sleeve is integrally formed, when in use, the rubber sleeve is sleeved on the boss 201, and when the pump body 1 and the pump cover 2 are fastened and connected by the bolt 6, the rubber sleeve fills the gap between the pump body 1 and the pump cover 2, so that the stability between the pump body 1 and the pump cover 2 is increased, the sealing performance between the pump body 1 and the pump cover 2 is improved, and the service life of the pump cover 2 is prolonged; the advantage of this embodiment is that with the above arrangement, the service life of the pump cover 2 is extended.

The working principle of the embodiment of the utility model is as follows:

when using, pump shaft 3 rotates and drives the impeller rotation, the impeller rotates and makes the inside liquid stream of the pump body 1 become the high-pressure liquid stream and flow out by the export of the pump body 1, the high-pressure liquid stream of the inside of the pump body 1 can form the impact to the clearance between the pump cover 2 and the pump body 1, because the clearance between the pump cover 2 and the pump body 1 is equipped with sealing member 5, sealing member 5 forms the sealed to the clearance between the pump cover 2 and the pump body 1 under the extrusion between the pump cover 2 and the pump body 1, it forms the liquid stream to have avoided the high-pressure liquid stream to pass through the clearance, 2 integrality of pump cover has been guaranteed, the life of pump cover 2 has been improved.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the utility model. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.

Claims

1. A catalyst feed back pump characterized by: including both ends open-ended pump body (1), pump cover (2) are connected respectively to the both ends opening of the pump body (1), each pump cover (2) rotate and connect pump shaft (3), impeller is connected to pump shaft (3), the impeller is located the inside of the pump body (1), each pump cover (2) with be equipped with sealing member (5) between the pump body (1).

2. The catalyst return pump of claim 1, wherein: the opening of the pump body (1) is in a conical arrangement, a boss (201) is arranged at the end, close to the pump body (1), of the pump cover (2), and the boss (201) is matched with the opening of the pump body (1).

3. The catalyst return pump of claim 2, wherein: the boss (201) is provided with a first annular groove (202), and the sealing element (5) is clamped in the first annular groove (202).

4. The catalyst return pump of claim 2, wherein: the opening of the pump body (1) is provided with a second annular groove (101), and the sealing element (5) is clamped in the second annular groove (101).

5. The catalyst return pump of claim 4, wherein: the second annular groove (101) is close to the lower end of the opening of the pump body (1), and when the sealing element (5) is in a working position, the lower end of the sealing element (5) and the lower end of the opening of the pump body (1) are in the same plane.

6. The catalyst return pump of claim 1, wherein: the sealing element (5) is a rubber sealing ring.

7. The catalyst return pump of claim 1, wherein: the pump cover (2) is connected with the pump body (1) through a plurality of bolts (6), each bolt (6) is evenly arranged along the circumferential interval of the pump cover (2), and gaskets (7) are respectively arranged between each bolt (6) and the pump cover (2).

8. The catalyst return pump of claim 7, wherein: the gasket (7) is a spring gasket.

9. The catalyst return pump of claim 7, wherein: and a rubber sealing strip (4) is arranged between the pump cover (2) and the pump body (1).

10. The catalyst return pump of claim 2, wherein: the sealing element (5) is a rubber sleeve, the rubber sleeve is slightly smaller than the boss (201), and the thickness of the rubber sleeve is slightly larger than a gap between the opening of the pump body (1) and the boss (201) of the pump cover (2).