CN215595931U

CN215595931U - Two-stage cone type vacuum pump tailored for waste incineration power plant

Info

Publication number: CN215595931U
Application number: CN202121411444.6U
Authority: CN
Inventors: 苏广生; 万义安; 陈学义
Original assignee: Guangzhou Huantou Huacheng Environmental Protection Energy Co ltd
Current assignee: Guangzhou Huantou Huacheng Environmental Protection Energy Co ltd
Priority date: 2021-06-24
Filing date: 2021-06-24
Publication date: 2022-01-21
Anticipated expiration: 2031-06-24

Abstract

The utility model discloses a two-stage cone-shaped vacuum pump tailored for a waste incineration power plant, which belongs to the technical field of waste incineration power plants and comprises a first-stage pump body, wherein the top of the first-stage pump body is fixedly connected with a first-stage inlet of the vacuum pump, one side of the first-stage pump body is provided with a second-stage rotor, the outside of the second-stage rotor is provided with a second-stage flap wheel, one side of the second-stage flap wheel, which is far away from the first-stage pump body, is provided with a second-stage manifold, the two-stage cone-shaped vacuum pump adopts a two-stage design, the compression ratio is reduced, bubble breakage is prevented, cavitation damage is reduced, the temperature rise of sealing water is effectively controlled, cavitation erosion can be more effectively prevented than a single-stage pump, the impact of working fluid on the root of an impeller caused by bubble breakage is avoided, the vibration of the pump body is reduced, the noise is reduced, the vacuumizing capability is strong, the starting current is small, and the service lives of a bearing and the impeller are longer, the production requirements of optimized operation, energy conservation and consumption reduction are met.

Description

Two-stage cone type vacuum pump tailored for waste incineration power plant

Technical Field

The utility model relates to the technical field of waste incineration power plants, in particular to a two-stage cone-shaped vacuum pump tailored for a waste incineration power plant.

Background

The vacuum pump is a device or equipment for obtaining vacuum by pumping a pumped container by using a mechanical, physical, chemical or physicochemical method, and is a device for improving, generating and maintaining vacuum in a certain closed space by using various methods.

The traditional condenser vacuum pump has the following defects that 1, the original condenser vacuum pump is a single-stage flat disc vacuum pump, a long impeller is added in the vacuum pump to ensure the air flow, the air stroke is correspondingly prolonged, the cavitation damage of the vacuum pump is aggravated, the impeller is thin in design and does not have a reinforcing rib to ensure the air suction capacity, the impeller is easy to damage due to impact, the first stage and the second stage of the single-stage flat disc vacuum pump are connected through an intermediate wall, the compression ratio distribution of the first stage and the second stage is uneven, the shaft changes more and long, the problems that the first stage of a pump body is easy to generate cavitation, the shaft is easy to break and the like are caused, in addition, the air inflow of the single-stage flat disc vacuum pump is small, the structure is complex, the sealing surface is multiple, faults are easy to occur, and the maintenance is difficult, and therefore, a two-stage cone type vacuum pump tailored for a waste incineration power plant is provided.

Disclosure of Invention

The utility model provides a two-stage cone-shaped vacuum pump custom-made for a waste incineration power plant, which aims to solve the problems of serious cavitation damage, high pump body fault rate and the like of the vacuum pump of the waste incineration power plant and meet the requirements of the normal operation and the vacuumizing capacity during starting and stopping of a steam turbine set, thereby avoiding the phenomena of large vibration, large noise and unstable operation of the vacuum pump during operation.

The specific technical scheme provided by the utility model is as follows:

the utility model provides a two-stage cone-shaped vacuum pump tailored for a waste incineration power plant, which comprises a first-stage pump body, wherein the top of the first-stage pump body is fixedly connected with a first-stage inlet of the vacuum pump, a second-stage rotor is arranged on one side of the first-stage pump body, a second-stage flap wheel is arranged outside the second-stage rotor, a second-stage manifold is arranged on one side of the second-stage flap wheel, which is far away from the first-stage pump body, an interstage check valve is arranged on one side of the second-stage manifold, a second-stage cone is arranged inside the second-stage flap wheel, a TE support is arranged between the second-stage flap wheel and the first-stage pump body, a first-stage TE cone is arranged inside the first-stage pump body, a first-stage rotor is arranged on the right side inside the first-stage pump body, a first-stage DE cone is arranged on one side of the first-stage rotor, and a shaft is arranged inside the first-stage pump body.

Optionally, one side of the top of the first-stage pump body is fixedly connected with a TE head, and the other side of the top of the first-stage pump body is fixedly connected with a DE head.

Optionally, an exhaust pipe is installed on one side, away from the first-stage pump body, of the second-stage manifold.

Optionally, a first-stage inlet of the vacuum pump is installed at the top of the first-stage pump body.

The utility model has the following beneficial effects:

1. the two-stage cone-type vacuum pump adopts a two-stage design, reduces the compression ratio, prevents bubbles from breaking, reduces cavitation damage, effectively controls the temperature rise of sealing water, can effectively prevent cavitation from being generated compared with a single-stage pump under the same condition, adopts the design of cone inlet and outlet ports, ensures that the bubbles cannot be gathered on the metal surfaces of impellers and the like, and can be timely discharged without breaking, fundamentally avoids the impact of working liquid caused by the breaking of the bubbles on the root parts of the impellers, reduces the vibration of a pump body, reduces noise, has strong vacuum pumping capacity, small starting current and longer service life of a bearing and the impellers, and achieves the production requirements of optimized operation, energy conservation and consumption reduction on the premise of meeting the stable operation of a waste incineration power plant.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1 is a schematic diagram of an overall configuration of a two-stage cone-type vacuum pump tailored for a waste incineration power plant according to an embodiment of the present invention;

FIG. 2 is a schematic view of a two-stage cone-type vacuum pump for a refuse burning power plant, which is tailored to operate under low vacuum conditions according to an embodiment of the present invention;

fig. 3 is a schematic diagram of a two-stage cone-type vacuum pump for a refuse incineration power plant, which is tailored to operate under high vacuum conditions according to an embodiment of the present invention.

In the figure: 1. a TE head; 2. a second stage rotor; 3. a second stage of lobes; 4. a second stage manifold; 5. a manifold cover; 6. an exhaust pipe; 7. an interstage check valve; 8. a second stage cone; 9. a TE support; 10. a first stage TE cone; 11. a first stage pump body; 12. a first stage rotor; 13. a first stage DE cone; 14. a shaft; 15. a DE head; 16. a vacuum pump primary inlet.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings, and it is apparent that the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

A two-stage cone-type vacuum pump tailored for a refuse incineration power plant according to an embodiment of the present invention will be described in detail with reference to fig. 1 to 3.

Referring to fig. 1, 2 and 3, a two-stage pyramidal vacuum pump tailored for a waste incineration power plant according to an embodiment of the present invention includes a first-stage pump body 11, a first-stage inlet 16 of the vacuum pump is fixedly connected to a top of the first-stage pump body 11, a second-stage rotor 2 is installed on one side of the first-stage pump body 11, a second-stage impeller 3 is installed outside the second-stage rotor 2, a second-stage manifold 4 is installed on one side of the second-stage impeller 3 away from the first-stage pump body 11, an interstage check valve 7 is installed on one side of the second-stage manifold 4, a second-stage cone 8 is installed inside the second-stage impeller 3, a TE bracket 9 is installed between the second-stage impeller 3 and the first-stage pump body 11, a first-stage TE cone 10 is installed inside the first-stage pump body 11, a first-stage rotor 12 is installed on a right side inside the first-stage pump body 11, a first-stage DE cone 13 is installed on one side of the first-stage rotor 12, the first-stage pump body 11 is internally provided with a shaft 14.

The two-stage cone-type vacuum pump adopts a two-stage design, reduces the compression ratio, prevents bubbles from breaking, reduces cavitation damage, effectively controls the temperature rise of sealing water, can effectively prevent cavitation from being generated compared with a single-stage pump under the same condition, adopts the design of a cone inlet and a cone outlet, ensures that bubbles cannot be gathered on the metal surfaces of an impeller and the like, and can be discharged in time without breaking, fundamentally avoids the impact of working liquid caused by the breaking of the bubbles on the root of the impeller, reduces the vibration of a pump body, reduces noise, has strong vacuum pumping capability, small starting current and longer service life of a bearing and the impeller, and meets the production requirements of optimized operation, energy conservation and consumption reduction on the premise of meeting the stable operation of a waste incineration power plant.

Referring to fig. 1, a TE head 1 is fixedly connected to one side of the top of the first-stage pump body 11, and a DE head 15 is fixedly connected to the other side of the top of the first-stage pump body 11.

Illustratively, the TE head 1 and the DE head are fixed to the top of the first stage pump body 1 as inlets of the vacuum pump.

Referring to fig. 1, the side of the second stage manifold 4 away from the first stage pump body 11 is provided with an exhaust pipe 6.

Illustratively, the exhaust pipe 6 performs an exhaust operation when used as a pump body exhaust mechanism.

Referring to fig. 1, the second stage manifold 4 is detachably attached to a manifold cover 5.

Illustratively, the opening and closing of the second stage manifold 4 may be controlled by a manifold cover 5.

In use, exhaust gas and compressed liquid are exhausted from the first stage of the vacuum pump into the second stage manifold 4 during operation, the inter-stage check valve 7 in the second stage manifold 4 is opened during low vacuum operation to allow the first stage exhaust to flow directly into an externally located air exhaust separator, so that, during low vacuum conditions, only the first stage of the vacuum pump is used to perform the evacuation function, during high vacuum operation the inter-stage check valve 7 is automatically closed, the first stage exhaust then enters the inlet of the second stage and is exhausted into the separator prior to passing through the second stage manifold 4, during low vacuum and high vacuum operating conditions, the compressed liquid in the vacuum pump can provide a supplementary function of the liquid in the pump and act as a seal for the gap between the cone and rotor, the compressed liquid enters the vacuum pump at the first stage pump head, then, the compressed liquid enters the cone through a channel in the pump head, enters the rotor chamber through a gap between the cone and the rotor, is discharged into a second-stage manifold 4 together with the exhaust gas, and directly enters an air discharge separator or a second-stage inlet from the second-stage manifold 4, and then is discharged into the separator together with the exhaust gas, the two-stage cone-type vacuum pump adopts a two-stage design, reduces the compression ratio, prevents bubble breakage, effectively reduces cavitation damage, adopts the design of the cone inlet and exhaust ports, the inlet and exhaust ports can be made large, the vacuum pump allows a condensing nozzle to be added at the inlet of the vacuum pump due to the large inlet and exhaust ports, precools the gas at the suction inlet of the vacuum pump, cools most of water vapor, thereby improving the air pumping capacity of the vacuum pump, and the air inlet and exhaust ports of the cone-opening vacuum pump are designed on the cone, the cone is deeply arranged in the pump body, the whole impeller is formed by casting once, and the end head of the impeller is reinforced in a whole annular mode, so that the impeller is very firm in structure. The two-stage cone-type vacuum pump adopts a two-stage design, reduces the compression ratio, prevents bubbles from breaking, reduces cavitation damage, effectively controls the temperature rise of sealing water, can more effectively prevent cavitation from generating than a single-stage pump under the same condition, adopts a cone to enter, and can reduce the pressure loss of the sealing water, The design of the steam outlet ensures that bubbles can not be gathered on the surfaces of metal such as the impeller and the like and can be discharged in time without being broken, thereby fundamentally avoiding the impact of working fluid caused by the broken bubbles on the root part of the impeller, reducing the vibration of a pump body, reducing the noise, having strong vacuum pumping capability, small starting current and longer service life of a bearing and the impeller, and achieving the production requirements of optimized operation, energy conservation and consumption reduction on the premise of meeting the stable operation of a waste incineration power plant.

The utility model is a two-stage cone-shaped vacuum pump tailored for a waste incineration power plant, which comprises a TE head 1, a second-stage rotor 2, a second-stage flap wheel 3, a second-stage manifold 4, a manifold cover 5, an exhaust pipe 6, an inter-stage check valve 7, a second-stage cone 8, a TE support 9, a first-stage TE cone 10, a first-stage pump body 11, a first-stage rotor 12, a first-stage DE cone 13, a shaft 14, a DE head 15 and a vacuum pump first-stage inlet 16, wherein the components are all universal standard components or components known by those skilled in the art, and the structure and principle of the vacuum pump can be known by the technical manual or by the conventional experimental method.

It will be apparent to those skilled in the art that various modifications and variations can be made in the embodiments of the present invention without departing from the spirit or scope of the embodiments of the utility model. Thus, if such modifications and variations of the embodiments of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to encompass such modifications and variations.

Claims

1. The utility model provides a for two-stage centrum type vacuum pump of msw incineration power plant custom-made, includes the first order pump body (11), its characterized in that, first order pump body (11) top fixedly connected with vacuum pump first order entry (16), second level rotor (2) are installed to first order pump body (11) one side, second level rotor (2) externally mounted has second level flap wheel (3), second level flap wheel (3) are kept away from first order pump body (11) one side and are installed second level manifold (4), interstage check valve (7) is installed to second level manifold (4) one side, second level flap wheel (3) internally mounted has second level circular cone (8), install TE support (9) between second level flap wheel (3) and the first order pump body (11), first order pump body (11) internally mounted has first order TE awl (10), first order rotor (12) are installed on first order pump body (11) inside right side, first order DE circular cone (13) is installed to first order rotor (12) one side, first order pump body (11) internally mounted has axle (14).

2. The two-stage centrum vacuum pump tailored to a waste incineration plant according to claim 1, characterized in that a TE head (1) is fixedly connected to one side of the top of the first stage pump body (11), and a DE head (15) is fixedly connected to the other side of the top of the first stage pump body (11).

3. A two-stage centrum vacuum pump tailored to a waste incineration plant according to claim 1, characterised in that the side of the second stage manifold (4) remote from the first stage pump body (11) is fitted with an exhaust pipe (6).

4. A two-stage centrum vacuum pump tailored to a waste incineration plant according to claim 1, characterized in that a vacuum pump first stage inlet (16) is mounted on top of the first stage pump body (11).