阅读说明：本技术 一种带封闭式副叶轮的管道泵 (pipeline pump with closed type auxiliary impeller ) 是由 徐昌 于 2018-06-07 设计创作，主要内容包括：一种带封闭式副叶轮的管道泵。泵轴下端泵体内固定连接有水平放置的叶轮,叶轮下端固定连接有垂直的叶轮连接管,叶轮连接管下端固定连接有水平放置的封闭式副叶轮,封闭式副叶轮的位置在底座上端的圆筒内,封闭式副叶轮下端与进液道的弹性管接头水平紧密贴合,封闭式副叶轮上端紧贴有固定在底座上的水平的圆环形弹性压盖,封闭式副叶轮下面有一U形流道连通封闭式副叶轮外腔体与弹性管接头下面的进液道,U形流道中间有一锥形阀。(A pipeline pump with a closed auxiliary impeller. The lower end of the pump shaft is fixedly connected with a horizontally arranged impeller in a pump body, the lower end of the impeller is fixedly connected with a vertical impeller connecting pipe, the lower end of the impeller connecting pipe is fixedly connected with a horizontally arranged closed auxiliary impeller, the closed auxiliary impeller is positioned in a cylinder at the upper end of a base, the lower end of the closed auxiliary impeller is horizontally and tightly attached to an elastic pipe joint of a liquid inlet pipeline, the upper end of the closed auxiliary impeller is tightly attached to a horizontal annular elastic gland fixed on the base, a U-shaped flow channel is arranged below the closed auxiliary impeller and is communicated with an outer cavity of the closed auxiliary impeller and the liquid inlet pipeline below the elastic pipe joint, and a.)

1. A pipeline pump with a closed auxiliary impeller is characterized in that a vertical impeller connecting pipe is fixedly connected to the lower end of an impeller which is horizontally arranged, a closed auxiliary impeller which is horizontally arranged is fixedly connected to the lower end of the impeller connecting pipe, the closed auxiliary impeller is arranged in a cylinder at the upper end of a base, the lower end of the closed auxiliary impeller is horizontally and tightly attached to an elastic pipe joint of a liquid inlet pipeline, a horizontal annular elastic gland fixed on the base is tightly attached to the upper end of the closed auxiliary impeller, a U-shaped flow channel is arranged below the closed auxiliary impeller and communicated with an outer cavity of the closed auxiliary impeller and the liquid inlet pipeline below the elastic pipe joint, and a conical valve.

Technical Field

the invention relates to a fluid pump, in particular to a pipeline pump with a closed type auxiliary impeller.

Background

In the industries of petroleum, chemical industry, fertilizer, metallurgy, mining, carbon black, paper making and the like, a pump is indispensable equipment for conveying liquid. Mechanical seals are important components of pumps. Pump delivery fluid leaks are mostly due to mechanical seal leaks.

The leakage of the liquid delivered by the pump not only pollutes the environment and causes economic loss, but also can cause safety accidents.

The replacement of the mechanical seal is time consuming, labor consuming and expensive.

The prior pipeline pump has the following defects: 1. the mechanical seal leakage pump can not work normally; 2. because the mechanical seal is not resistant to high temperature, the mechanical seal is difficult to convey high-temperature liquid; 3. it is difficult to transport the liquid of the pellets because the pellets are liable to damage the mechanical seal; 4. the mechanical seal is poor in acid and alkali resistance, so that the acid and alkali liquor cannot be conveyed for a long time; 5. high pressure mechanical seals are vulnerable and therefore pumping high pressure liquids is difficult.

Disclosure of Invention

The invention aims to provide a pipeline pump without a mechanical seal and with a closed auxiliary impeller, and aims to solve the problem that the pipeline pump cannot be normally used due to leakage of the mechanical seal.

The technical scheme adopted by the invention is as follows:

A pipeline pump with a closed auxiliary impeller is composed of a base, a pump body and a connecting frame. The pump comprises a connecting frame, a vertical pump shaft, a shaft coupling, a horizontally-arranged impeller, a vertical impeller connecting pipe, a horizontally-arranged closed auxiliary impeller, a U-shaped flow passage, a conical valve and a conical valve, wherein the vertical pump shaft is erected in a bearing frame in the connecting frame, the upper end of the pump shaft is fixedly connected with the shaft coupling, the lower end of the pump shaft is fixedly connected with the horizontally-arranged impeller in the pump body, the lower end of the impeller is fixedly connected with a vertical impeller connecting pipe, the lower end of the impeller connecting pipe is fixedly connected with a horizontally-arranged closed auxiliary impeller, the closed auxiliary impeller is arranged in a cylinder at the upper end of a base, the lower end of the closed auxiliary impeller is horizontally and tightly attached to an elastic pipe. The impeller is provided with a hollow rotor cavity, a flow passage of the impeller is radial in the radial direction, a static inverted L-shaped pitot tube which is provided with a suction inlet and penetrates out of the impeller downwards, penetrates through an impeller connecting pipe, a closed type auxiliary impeller and an elastic pipe joint and is communicated with a pump discharge port in the base and fixed in the base is arranged in the rotor cavity of the impeller, and a ball float valve is arranged in the pump body and is communicated with the liquid inlet passage.

The invention has the positive effects that: compared with the existing pipeline pump, the invention has the advantages that: 1. the failure rate of the pump is greatly reduced due to the absence of mechanical seal; 2. the maintenance times are reduced, the integral service life of the pump is prolonged; 3. the pump can greatly improve the performance of conveying high-temperature and high-pressure liquid containing a certain amount of particles and acid and alkali.

Drawings

FIG. 1 is a schematic of the present invention. 1-base 2-pump body 3-connecting frame 4-bearing 5-pump shaft 6-coupling 7-impeller 8-impeller connecting pipe 9-closed auxiliary impeller 10-elastic pipe joint 11-circular elastic gland 12-U-shaped flow passage 13-conical valve 14-pitot tube 15-ball float valve

Detailed Description

The invention will now be further described, by way of example, with reference to the accompanying drawings, in which:

As shown in fig. 1, the pipeline pump with the closed type auxiliary impeller is composed of a base 1, a pump body 2 and a connecting frame 3. A vertical pump shaft 5 is erected on a bearing 4 in a connecting frame 3, a coupling 6 is fixedly connected at the upper end of the pump shaft 5, a horizontally placed impeller 7 is fixedly connected in a pump body 2 at the lower end of the pump shaft 5, a vertical impeller connecting pipe 8 is fixedly connected at the lower end of the impeller 7, a horizontally placed closed auxiliary impeller 9 is fixedly connected at the lower end of the impeller connecting pipe 8, the closed auxiliary impeller 9 is positioned in a cylinder at the upper end of a base 1, the lower end of the closed auxiliary impeller 9 is horizontally and tightly attached to an elastic pipe joint 10 of a liquid inlet channel, a horizontal annular elastic gland 11 fixed on the base 1 is tightly attached at the upper end of the closed auxiliary impeller 9, a U-shaped flow channel 12 is arranged below the closed auxiliary impeller 9 and is communicated with an outer cavity of the closed auxiliary impeller 9 and the liquid inlet channel below the elastic pipe joint 10, a conical valve 13 is arranged in the middle of the U-, a static inverted L-shaped pitot tube 14 which is provided with a suction inlet and penetrates out of the impeller 7 downwards, penetrates through an impeller connecting pipe 8, a closed type auxiliary impeller 9 and an elastic pipe joint 10 and is communicated with a pump discharge port in the base 1 and is fixed in the base is arranged in a rotor cavity of the impeller 7.

A ball float valve 15 is arranged in the pump body 2 and is communicated with the liquid inlet channel.

When the device is used, a conveying medium of the liquid inlet channel flows into the impeller 7 through the outer impeller connecting pipe 8 of the pitot tube 14, the impeller 7 and the impeller connecting pipe 8 are driven by the pump shaft 5 to rotate the closed auxiliary impeller 9, the conveying medium obtains high-speed rotating kinetic energy in a flow channel and a rotor cavity of the impeller 7, the pitot tube 14 converts the high-speed kinetic energy stagnation pressurization of the conveying medium into pressure energy, and then the conveying medium is discharged from the pump outlet 8, so that the purpose of conveying the medium by the pump is achieved. The conveying medium in the pump body 2 with the sealing function is controlled in a range that the conveying medium is lower than the impeller 7 and higher than the annular elastic gland 11, the conveying medium in the pump body 2 is pressurized by the closed type auxiliary impeller 9 and flows into the liquid inlet channel from a U-shaped flow channel 12 and a gap between the closed type auxiliary impeller 9 and the elastic pipe joint 10, and the conveying medium flowing out from the gap between the annular elastic gland 11 and the closed type auxiliary impeller 9 is sucked and pressurized by a liquid inlet of the closed type auxiliary impeller 9 and then flows into the U-shaped flow channel. The conveying medium has no leakage, and the purpose of no mechanical seal of the pipeline pump is achieved.