Underground length-adjustable underground water feeding pump for underground coal mine

Abstract

An underground coal mine underground water feeding pump capable of adjusting the underground length comprises a motor, a motor base, a base, an outlet pipe, a plurality of sections of middle outer pipes, a lower outer pipe, a guide vane, a horn pipe, a main shaft, a plurality of sections of middle shafts, an impeller shaft and an impeller, and the motor, the motor base, the base, the outlet pipe, the middle outer pipes, the lower outer pipe, the guide vane and the horn pipe are sequentially and fixedly installed from top to bottom. An output shaft of the motor, the main shaft, the middle shaft, the impeller shaft and the impeller are sequentially and fixedly installed from top to bottom, the middle outer pipe comprises at least one short middle outer pipe and a plurality of long middle outer pipes, and the short middle outer pipes and the long middle outer pipes are arranged from top to bottom. And the intermediate shaft comprises a short intermediate shaft matched with the short intermediate outer pipe and a long intermediate shaft matched with the long intermediate outer pipe. The overall length of the middle outer pipe can be adjusted according to the depth of a mine, so that the impeller descends to the designated depth, drainage is thorough, and it is guaranteed that the base is smoothly, conveniently and rapidly installed.

Description

Technical Field

[0001] The utility model relates to a submersible feed pump for underground coal mines, in particular to a submersible feed pump for underground coal mines with adjustable submersible length. Background Art

[0002] The submersible feed pump is installed in front of the main drainage pump in the coal mine and used in series with the main drainage pump to form a positive pressure water supply at the inlet of the main drainage pump, so as to ensure that the main drainage pump can be started without vacuum pumping and eliminate the cavitation phenomenon of the main drainage pump.

[0003] The submersible feed pump includes a motor, a motor base, a base, an outlet pipe, multiple intermediate outer pipes, a lower outer pipe, a guide vane, a bellmouth, a main shaft, multiple intermediate shafts, an impeller shaft and an impeller. The motor, the motor base, the base, the outlet pipe, the intermediate outer pipes, the lower outer pipe, the guide vane and the bellmouth are fixedly installed in sequence from top to bottom. The output shaft of the motor, the main shaft, the intermediate shafts, the impeller shaft and the impeller are fixedly installed in sequence from top to bottom. During installation, the base of the submersible feed pump is installed on the mounting seat on the pump house floor, and the outlet pipe, the intermediate outer pipes, the lower outer pipe, the guide vane and the bellmouth extend down into the mine. This submersible feed pump has the following problems: the lengths of the multiple intermediate outer pipes are equal. For a mine with a certain depth, the intermediate outer pipes may be too short, causing the impeller not to extend down to the specified depth and resulting in incomplete drainage; or the intermediate outer pipes may be too long, causing the impeller to touch the bottom of the mine and the base to hang above the pump house floor, making it impossible to install. Summary of the Invention

[0004] The utility model is to solve the above technical problems and provides a submersible feed pump for underground coal mines with adjustable submersible length, which can adjust the overall length of the intermediate outer pipes according to the depth of the mine, so that the impeller extends down to the specified depth, ensuring complete drainage and facilitating the smooth installation of the base, with convenient and rapid installation.

[0005] The technical solution of the utility model is as follows:

[0006] A submersible feed pump for underground coal mines with adjustable submersible length includes a motor, a motor base, a base, an outlet pipe, multiple intermediate outer pipes, a lower outer pipe, a guide vane, a bellmouth, a main shaft, multiple intermediate shafts, an impeller shaft and an impeller. The motor, the motor base, the base, the outlet pipe, the intermediate outer pipes, the lower outer pipe, the guide vane and the bellmouth are fixedly installed in sequence from top to bottom. The output shaft of the motor, the main shaft, the intermediate shafts, the impeller shaft and the impeller are fixedly installed in sequence from top to bottom. The special feature is that: the intermediate outer pipes include at least one short intermediate outer pipe and multiple long intermediate outer pipes, the short intermediate outer pipe and the long intermediate outer pipes are arranged up and down, and the intermediate shafts include a short intermediate shaft matching the short intermediate outer pipe and a long intermediate shaft matching the long intermediate outer pipes.

[0007] Further, the number of the short intermediate outer pipes is one or two.

[0008] Furthermore, the length of the short intermediate outer tube is less than half of the length of the long intermediate outer tube.

[0009] Furthermore, the length of the short intermediate outer tube is 0.3 m - 0.5 m, and the length of the long intermediate outer tube is 1 m - 1.2 m.

[0010] Furthermore, rubber bearings are respectively installed between the outlet pipe and the intermediate outer tube, between two adjacent upper and lower intermediate outer tubes, and between the intermediate outer tube and the guide vane. The rubber bearings are sleeved on the outer circumferential surfaces of the corresponding intermediate shaft and impeller shaft, and provide support for the intermediate shaft and impeller shaft through the rubber bearings.

[0011] Furthermore, coupling nuts are respectively connected between the main shaft and the intermediate shaft, between adjacent upper and lower intermediate shafts, and between the intermediate shaft and the impeller shaft.

[0012] Furthermore, thread glue is applied to the threads of the coupling nuts to prevent the coupling nuts from loosening caused by reverse rotation.

[0013] Furthermore, a filter screen is fixedly installed at the bottom of the trumpet-shaped pipe to prevent sediment from entering.

[0014] The beneficial effects of the present utility model are as follows:

[0015] During installation operation, the overall length of the intermediate pipe is calculated according to the depth of the mine. The appropriate number of short intermediate outer tubes and long intermediate outer tubes are selected and assembled according to the overall length of the intermediate pipe, so that the impeller can be lowered to the specified depth, the drainage is complete, and the smooth installation of the base is ensured. The installation is convenient and fast. Description of the Drawings

[0016] Figure 1 is a schematic structural diagram of the present utility model;

[0017] Figure 2 is Figure 1 the enlarged view of part A in

[0018] In the figure: 1 - motor, 2 - motor base, 3 - base, 4 - outlet pipe, 5 - intermediate outer tube, 6 - lower outer tube, 7 - guide vane, 8 - trumpet-shaped pipe, 9 - filter screen, 10 - main shaft, 11 - intermediate shaft, 12 - impeller shaft, 13 - impeller, 14 - rubber bearing, 15 - coupling nut, 501 - short intermediate outer tube, 502 - long intermediate outer tube, 1101 - short intermediate shaft, 1102 - long intermediate shaft. Specific Embodiments

[0019] As Figure 1 、 Figure 2As shown in the figure, a submerged feed water pump for coal mines with adjustable submerged length includes a motor 1, a motor base 2, a base 3, an outlet pipe 4, multiple intermediate outer pipes 5, a lower outer pipe 6, a guide vane 7, a bellmouth 8, a filter screen 9, a main shaft 10, multiple intermediate shafts 11, an impeller shaft 12 and an impeller 13. The motor 1, the motor base 2, the base 3, the outlet pipe 4, the intermediate outer pipes 5, the lower outer pipe 6, the guide vane 7, the bellmouth 8 and the filter screen 9 are fixedly installed in sequence from top to bottom. The output shaft of the motor 1, the main shaft 10, the intermediate shafts 11, the impeller shaft 12 and the impeller 13 are fixedly installed in sequence from top to bottom. The intermediate outer pipe 5 includes a short intermediate outer pipe 501 and multiple long intermediate outer pipes 502. The length of the short intermediate outer pipe 501 is 0.4 m, and the length of the long intermediate outer pipe 502 is 1.2 m. The short intermediate outer pipe 501 and the long intermediate outer pipes 502 are arranged vertically. The intermediate shaft 11 includes a short intermediate shaft 1101 matching the short intermediate outer pipe 501 and a long intermediate shaft 1102 matching the long intermediate outer pipes 502. Rubber bearings 14 are respectively installed between the outlet pipe 4 and the intermediate outer pipe 5, between two adjacent intermediate outer pipes 5 vertically, and between the intermediate outer pipe 5 and the guide vane 7. The rubber bearings 14 are sleeved on the outer circumferential surfaces of the corresponding intermediate shafts 11 and the impeller shaft 12. Coupling nuts 15 are respectively connected between the main shaft 10 and the intermediate shafts 11, between adjacent intermediate shafts 11 vertically, and between the intermediate shaft 11 and the impeller shaft 12. Thread sealant is applied to the threads of the coupling nuts 15 to prevent thread loosening.

[0020] During installation operation, first calculate the overall length of the intermediate outer pipe 5 according to the depth of the mine shaft, select the quantities of the short intermediate outer pipe 501, the long intermediate outer pipes 502, the short intermediate shaft 1101 and the long intermediate shaft 1102 according to the overall length of the intermediate outer pipe 5, then assemble the feed water pump one by one from bottom to top and release it into the mine shaft while assembling. After all the assembly is completed, fixedly install the base 3 on the mounting seat on the ground of the mine shaft.

[0021] The above are only specific embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A submersible water pump for use in coal mines with adjustable submersible length, comprising a motor, a motor seat, a base, an outlet pipe, a multi-section intermediate outer pipe, a lower outer pipe, a guide vane, a trumpet pipe, a main shaft, a multi-section intermediate shaft, an impeller shaft and an impeller, wherein the motor, the motor seat, the base, the outlet pipe, the intermediate outer pipe, the lower outer pipe, the guide vane and the trumpet pipe are fixedly installed in sequence up and down, and the output shaft, the main shaft, the intermediate shaft, the impeller shaft and the impeller of the motor are fixedly installed in sequence up and down, characterized in that: The intermediate outer tube includes at least one short intermediate outer tube and a plurality of long intermediate outer tubes, the short intermediate outer tubes and the long intermediate outer tubes are arranged up and down, and the intermediate shaft includes a short intermediate shaft matched with the short intermediate outer tube and a long intermediate shaft matched with the long intermediate outer tube.

2. The submersible water feeding pump for coal mines with adjustable submersible length according to claim 1, characterized in that: The number of the short intermediate outer tubes is one or two.

3. The submersible water feeding pump for coal mines with adjustable submersible length according to claim 1, characterized in that: The length of the short intermediate outer tube is less than half of the length of the long intermediate outer tube.

4. The submersible water feeding pump for underground coal mines with adjustable submersible length according to claim 3 is characterized in that: The length of the short middle outer tube is 0.3m-0.5m, and the length of the long middle outer tube is 1m-1.2m.

5. The submersible water feeding pump for coal mines with adjustable submersible length according to claim 1 is characterized in that: Rubber bearings are respectively installed between the outlet pipe and the intermediate outer pipe, between two adjacent intermediate outer pipes, and between the intermediate outer pipe and the guide vane. The rubber bearings are sleeved on the corresponding intermediate shaft and the outer circumferential surface of the impeller shaft.

6. The submersible water feeding pump for underground coal mines with adjustable submersible length according to claim 1, characterized in that: Coupling nuts are respectively connected between the main shaft and the intermediate shaft, between the upper and lower adjacent intermediate shafts, and between the intermediate shaft and the impeller shaft.

7. The submersible water feeding pump for coal mines with adjustable submersible length according to claim 1 is characterized in that: Thread sealant is applied to the threads of the coupling nut.

8. The submersible water feeding pump for coal mines with adjustable submersible length according to claim 1, characterized in that: A filter is fixedly installed at the bottom of the trumpet tube.

Images