Water supply device and its maintenance method

Abstract

The present invention relates to a water passing device and a maintenance method thereof. The water passing device includes a cylinder ring end plate water passing hole and a cylinder ring connecting plate water passing hole opened on the cylinder ring, an end plate water passing groove, an end plate connecting water passing groove and an end plate water passing hole opened on the end plate, a blade water passing groove and a blade water passing hole opened on the blade, a water inlet channel arranged in the connecting plate, and a triangular body water tank arranged at the connection between the end plate and the starting end of the blade. The water inlet channel, the cylinder ring connecting plate water passing hole, the blade water passing groove and the blade water passing hole are communicated with each other in sequence. The cylinder ring end plate water passing hole, the end plate connecting water passing groove, the end plate water passing groove and the end plate water passing hole are communicated with each other. The triangular body water tank is simultaneously communicated with the blade water passing groove and the end plate connecting water passing groove. The maintenance method of the water passing device is to insert flexible steel bars into the water channels in the end plate and the blade respectively to clean the corresponding water channels. The present invention can avoid wear and soldering failure during use, and has simple maintenance, can improve the service life of the drum, and enhance the safety of the underground working environment.

Description

Technical Field

[0001] The present invention relates to a water passing device for internal spray of a shearer drum and a maintenance method thereof. Background Art

[0002] Article 119(2) of the "Coal Mine Safety Regulations" stipulates that the working pressure of the internal spray device of the shearer shall not be less than 2 MPa. Since the internal spray of the shearer is realized by the drum, a water passing device is configured inside the drum. Currently, the water channels in the end plate of the commonly used water passing device are connected to the water channels in the blades through U-shaped pipes, and there are the following problems in its use:

[0003] First, it is easy to wear or become ineffective due to welding detachment: Since the water passing mechanism between the drum end plate and the blade, that is, the U-shaped pipe, protrudes outside the drum ring surface and adopts a welded structure, during use, this water passing device is easily hit, rubbed, and squeezed by the cut coal and rock, and it is easy to have water leakage faults caused by wear or welding detachment.

[0004] Second, it is not convenient for maintenance: This type of water passing mechanism may be blocked during use. After being blocked, due to the welded structure, maintenance is not convenient. Usually, major projects such as hoisting the well and cutting the weld seam are required for maintenance, and the cost is very high. Often, some enterprises with lax management even give up maintenance, and the phenomenon of violating the safety regulations and illegally mining coal occurs from time to time. Summary of the Invention

[0005] The present invention aims to provide a water passing device and a maintenance method thereof, which can avoid wear and welding detachment failure during use, and have simple maintenance, can improve the service life of the drum, and enhance the safety of the underground working environment.

[0006] The main technical solutions of the present invention are as follows:

[0007] A water passing device, comprising a cylinder ring, a plurality of blades spirally wound around and fixed to the outer cylindrical surface of the cylinder ring, and an end plate fixed to one end of the outer cylindrical surface of the cylinder ring. A circumferential cylinder ring end plate water passing hole and a plurality of circumferentially dispersed cylinder ring connecting plate water passing holes are provided on the cylinder ring along the circumferential direction. An internal thread is provided at the inner end in the radial direction of each cylinder ring end plate water passing hole, and is blocked by installing a plug; a circumferential end plate water passing groove and a plurality of end plate connecting water passing grooves are provided on the inner cylindrical surface of the end plate. One end of the end plate connecting water passing groove communicates with the end plate water passing groove, and the other end penetrates through the end surface of the end plate close to the blade side. A plurality of radially radiating through end plate water passing holes are provided inside the end plate. The end plate water passing holes communicate with the end plate water passing grooves. The cylinder ring end plate water passing holes and the end plate water passing holes correspond to and communicate with each other one by one; a blade water passing groove is provided on the radial inner surface of each blade along the extending direction of the blade. A threaded hole is provided at the end of the blade, and the threaded hole communicates with the end plate water passing groove. The threaded hole is blocked by installing a plug. A plurality of radially through blade water passing holes are provided inside the blade. The blade water passing holes communicate with the blade water passing grooves. The outer end in the radial direction of the cylinder ring connecting plate water passing hole communicates with the blade water passing groove; a connecting plate is coaxially fixed to the inner cylindrical surface of the cylinder ring. A plurality of water inlet channels are dispersedly provided inside the connecting plate. The water outlet of the water inlet channel is opened on the outer cylindrical surface of the connecting plate. At least one cylinder ring connecting plate water passing hole communicates with the water outlet of one water inlet channel. The water inlet of the water inlet channel is blocked by installing a plug; the starting ends of all the blades lean against the end surface of the end plate. A closed triangular water tank is formed at the connection between the starting end of each blade and the end plate by arranging a water passing plate. The inside of the triangular water tank communicates with one end plate connecting water passing groove on the end plate and the blade water passing groove on the corresponding blade at the same time. The water passing plate is provided with a threaded hole, and the triangular water tank is blocked by installing a plug.

[0008] A filter is provided on each of the water inlet channels.

[0009] The water inlet of the water inlet channel is arranged on the end surface of the connecting plate close to the end plate.

[0010] The cross-sectional shape of the end plate water passing groove can be U-shaped.

[0011] The cross-sectional shape of the blade water passing groove can be U-shaped.

[0012] Preferably, the cylinder ring connecting plate water passing holes and the water outlets of the water inlet channels correspond to and communicate with each other one by one.

[0013] The water passing plate includes a water passing vertical plate and a water passing sealing plate. The plate surface of the water passing vertical plate is arranged along the radial direction of the cylinder ring. The water passing sealing plate closes the top opening surrounded by the end plate, the water passing vertical plate and the corresponding blade. The threaded hole on the water passing plate is arranged on the water passing vertical plate.

[0014] The outer ends in the radial direction of each of the end plate water passing holes and the blade water passing holes are respectively located on a tooth seat installation plane.

[0015] A differential pressure sensor is preferably installed on the filter.

[0016] A method for maintaining a water passing device: Open the plug on the water passing device located on the water passing plate and at the end of the corresponding blade, insert a flexible steel bar through the threaded hole on the water passing plate and export it from the threaded hole at the end of the blade, thus completing the cleaning of the water channel inside the corresponding blade; Open the plug installed at the inner end in the radial direction of the water passing hole on the barrel ring end plate, and sequentially penetrate the water passing hole on the barrel ring end plate and the corresponding end plate water passing hole with a flexible steel bar to complete the cleaning of a water channel inside the end plate.

[0017] For the water passing device provided with a differential pressure sensor, when the differential pressure sensor alarms, replace the filter element of the filter where the differential pressure sensor is located.

[0018] The beneficial effects of the present invention are as follows:

[0019] Since the present invention provides water troughs on the radial inner surfaces of the end plate and the blade, and a triangular water trough is provided at the connection between the end plate and the blade, the water channels inside the end plate and the blade are connected into a whole, the existing U-shaped pipe structure is cancelled, the wear and failure problem at the U-shaped pipe is avoided, and the reliability of the drum is improved.

[0020] The present invention provides a water passing plate at the connection between the end plate and the blade, which not only plays a role in connecting the two water channels inside the end plate and the blade, but also increases the connection strength of the blade, and greatly eliminates the phenomenon of welding detachment at this place.

[0021] By providing a filter, the present invention improves the cleanliness of the internal spray water and reduces the occurrence of water channel blockage.

[0022] By adopting the method for maintaining the water passing device of the present invention, the water channels inside the blade and the end plate can be conveniently cleaned regularly, thereby improving the cleanliness of the water channels and the overall reliability of the internal spray water channels. Description of the Drawings

[0023] Figure 1 is the front view of an embodiment of the drum where the water passing device of the present invention is located;

[0024] Figure 2 is Figure 1 the A-A cross-sectional view of

[0025] Figure 3 is Figure 1 the developed view of the drum blade of

[0026] Figure 4 is the schematic diagram of the water passing structure on the blade;

[0027] Figure 5 is the schematic diagram of the water passing structure on the barrel ring;

[0028] Figure 6 It is a schematic diagram of the water passage structure at the connection between the end plate and the blade;

[0029] Figure 7 It is a schematic diagram of the water passage structure on the end plate.

[0030] Reference numerals: 1. connecting plate; 2. filter; 3. cylinder ring; 3-1. water passage hole of the cylinder ring end plate; 3-2. water passage hole of the cylinder ring connecting plate; 4. blade; 4-1. water passage groove of the blade; 4-2. water passage hole of the blade; 5. end plate; 5-1. water passage hole of the end plate; 5-2. water passage groove of the end plate; 5-3. connecting water passage groove of the end plate; 6. water passage plate; 6-1. vertical water passage plate; 6-2. water passage sealing plate; 7. screw plug. Detailed implementation manner

[0031] The present invention discloses a water passage device, as Figures 1-7As shown in the figure, it includes a cylinder ring 3, a number of blades 4 spirally wound around the outer cylindrical surface of the cylinder ring and welded and fixed, and an end plate 5 welded and fixed at one end of the outer cylindrical surface of the cylinder ring. A circle of cylinder ring end plate water holes 3-1 and a plurality of circumferentially distributed cylinder ring connecting plate water holes 3-2 are provided on the cylinder ring along the circumferential direction. The cylinder ring end plate water holes are close to the end of the cylinder ring and axially correspond to the position where the end plate is installed on the cylinder ring. Axially, the position of the cylinder ring connecting plate water holes corresponds to the position of the fixed connecting plate inside the cylinder ring. The inner end of each cylinder ring end plate water hole in the radial direction is provided with an internal thread, and the internal thread is blocked by an installation plug 7. A circle of end plate water channels 5-2 and a plurality of end plate connecting water channels 5-3 are provided on the inner cylindrical surface of the end plate. One end of the end plate connecting water channel communicates with the end plate water channel, and the other end penetrates the end face of the end plate close to the blade side. Further, the end plate connecting water channel is preferably arranged to extend along the axial direction of the end plate. A plurality of penetrating end plate water holes 5-1 are radially and radially arranged inside the end plate, and the end plate water holes communicate with the end plate water channels. When the end plate and the cylinder ring are in the assembled state, the outer ends of the cylinder ring end plate water holes in the radial direction correspond to and communicate with the end plate water holes one by one, for supplying water to the internal spray nozzles on each tooth seat installed on the end plate. On the radial inner surface of each blade, a blade water channel 4-1 is provided along the extending direction of the blade. A threaded hole is provided at the end of the blade, and the threaded hole communicates with the end plate water channel, and the threaded hole is blocked by an installation plug 7. A plurality of penetrating blade water holes 4-2 are radially arranged inside the blade, and the blade water holes communicate with the blade water channels. The outer ends of the cylinder ring connecting plate water holes in the radial direction communicate with the blade water channels, and thus also communicate with the blade water holes, for supplying water to the internal spray nozzles on each tooth seat installed on the blade. A connecting plate 1 is coaxially fixed on the inner cylindrical surface of the cylinder ring. A plurality of water inlet channels are scattered inside the connecting plate, and the water outlet of the water inlet channel is opened on the outer cylindrical surface of the connecting plate. When the cylinder ring and the connecting plate are in the assembled state, at least one cylinder ring connecting plate water hole communicates with the water outlet of one water inlet channel. The water inlet of the water inlet channel is blocked by an installation plug (not shown). The water inlet of the water inlet channel is the total water inlet of the entire water passing device.

[0032] The starting ends of all the blades are all abutted against the end face of the end plate. At the connection between the starting end of each blade and the end plate, a closed triangular water tank is formed by arranging a water passing plate 6. The inside of the triangular water tank communicates with one end plate connecting water channel 5-3 on the end plate and the blade water channel 4-1 on the corresponding blade at the same time, so that the triangular water tank is interconnected with the water passing channels in the end plate and the corresponding blade, and water can flow freely among the three. The water passing plate is provided with a threaded hole, and the threaded hole is usually blocked by an installation plug 7 to block the triangular water tank.

[0033] Preferably, a detachable filter 2 is provided on each water inlet channel to filter the water entering the water passing device, and then supply the water to the water channels in the end plate and the blade to ensure the smoothness of the water channels.

[0034] The water inlet of the water inlet channel is preferably arranged on one end face of the connecting disk close to the end disk.

[0035] The cross-sectional shapes of the water through channels of the end disk and the blade water through channels can both be semi-circular or U-shaped.

[0036] The water through holes of the cylinder ring connecting disk and the water outlet of the water inlet channel are preferably in one-to-one correspondence and communicate with each other to ensure more balanced water supply to each blade.

[0037] In the embodiment shown in the attached drawings, the water through plate includes a vertical water through plate 6-1 and a water through sealing plate 6-2. The plate surface of the vertical water through plate is arranged along the radial direction of the cylinder ring. The water through sealing plate closes the top opening surrounded by the end disk, the vertical water through plate and the corresponding blade. The threaded holes on the water through plate are preferably arranged on the vertical water through plate, and further preferably arranged near the cylinder ring.

[0038] The outer ends in the radial direction of each water through hole of the end disk and the water through hole of the blade are respectively located on a tooth seat mounting plane. One tooth seat mounting plane on the end disk can be communicated with one or more water through holes of the end disk, and one tooth seat mounting plane on the blade can also be communicated with one or more water through holes of the blade. After the tooth seat is installed, the water through holes of the end disk and the blade are communicated with the spray water channels in the corresponding tooth seats.

[0039] A differential pressure sensor is preferably installed on the filter. When the filter element of the filter is blocked, the differential pressure sensor will send out a signal for prompt.

[0040] The present invention also discloses a method for maintaining the water through device. Open the screw plugs on the water through plate and at the end of the corresponding blade of the water through device to make the blade water through channel of the corresponding blade communicate with the outside. In this state, insert a flexible steel bar into the threaded hole on the water through plate and lead it out from the threaded hole at the end of the blade. Generally, through such multiple penetrations, the cleaning of the water channels in the corresponding blade, mainly the blade water through channel, can be completed. Open the screw plug installed at the inner end in the radial direction of the water through hole of the cylinder ring end disk, and sequentially penetrate the water through hole of the cylinder ring end disk and the corresponding water through hole of the end disk with a flexible steel bar. If there are impurities such as scale, they will flow out with the water through the water through hole of the cylinder ring end disk, thereby completing the cleaning of a water channel in the end disk. During the above operations with the flexible steel bar, internal spray water can be simultaneously introduced into the corresponding water channels to assist in discharging impurities.

[0041] On this basis, for the water through device equipped with a differential pressure sensor, when the differential pressure sensor alarms, replace the filter element of the filter where the differential pressure sensor is located to maintain the filtering capacity of the corresponding water inlet channel.

Claims

1. A water passing device, characterized in that: it includes a cylinder ring, a number of blades spirally wound around and fixed on the outer cylindrical surface of the cylinder ring, and an end plate fixed at one end of the outer cylindrical surface of the cylinder ring. A circle of cylinder ring end plate water passing holes and a plurality of circumferentially dispersed cylinder ring connecting plate water passing holes are provided on the cylinder ring in the circumferential direction. The inner end in the radial direction of each cylinder ring end plate water passing hole is provided with an internal thread and is blocked by installing a plug; a circle of end plate water passing grooves and a plurality of end plate connecting water passing grooves are provided on the inner cylindrical surface of the end plate. One end of the end plate connecting water passing groove communicates with the end plate water passing groove, and the other end penetrates the end surface of the end plate close to the blade side. A plurality of radially radiating through end plate water passing holes are provided inside the end plate. The end plate water passing holes communicate with the end plate water passing grooves. The cylinder ring end plate water passing holes and the end plate water passing holes correspond to each other and communicate; a blade water passing groove is provided on the radial inner surface of each blade along the extending direction of the blade. A threaded hole is provided at the end of the blade, and the threaded hole communicates with the end plate water passing groove. The threaded hole is blocked by installing a plug. A plurality of radially through blade water passing holes are provided inside the blade. The blade water passing holes communicate with the blade water passing grooves. The cylinder ring connecting plate water passing holes communicate with the blade water passing grooves; a connecting plate is coaxially fixed on the inner cylindrical surface of the cylinder ring. A plurality of water inlet channels are dispersedly provided inside the connecting plate. The water outlet of the water inlet channel is opened on the outer cylindrical surface of the connecting plate. At least one cylinder ring connecting plate water passing hole communicates with the water outlet of one water inlet channel. The water inlet of the water inlet channel is blocked by installing a plug; the starting ends of all the blades lean against the end surface of the end plate. A closed triangular water tank is formed at the connection between the starting end of each blade and the end plate by arranging a water passing plate. The inside of the triangular water tank communicates with one end plate connecting water passing groove on the end plate and the blade water passing groove on the corresponding blade at the same time. The water passing plate is provided with a threaded hole, and the triangular water tank is blocked by installing a plug.

2. The water passing device according to claim 1, characterized in that: a filter is provided on each of the water inlet channels.

3. The water passing device according to claim 2, characterized in that: the water inlet of the water inlet channel is arranged on the end surface of the connecting plate close to the end plate.

4. The water passing device according to claim 2, characterized in that: the cross-sectional shapes of the end plate water passing groove and the blade water passing groove are U-shaped.

5. The water passing device according to claim 2, characterized in that: the cylinder ring connecting plate water passing holes correspond to and communicate with the water outlets of the water inlet channels one by one.

6. The water passing device according to claim 2, characterized in that: the water passing plate includes a water passing vertical plate and a water passing sealing plate. The plate surface of the water passing vertical plate is arranged along the radial direction of the cylinder ring. The water passing sealing plate closes the top opening surrounded by the end plate, the water passing vertical plate and the corresponding blade. The threaded hole on the water passing plate is arranged on the water passing vertical plate.

7. The water passing device according to claim 2, characterized in that: the outer ends in the radial direction of each of the end plate water passing holes and the blade water passing holes are respectively located on a tooth seat installation plane.

8. The water passing device according to claim 2, 3, 4, 5, 6 or 7, characterized in that: a differential pressure sensor is installed on the filter.

9. A method for maintaining a water passing device, characterized in that: Open the plug on the water passing device described in any one of claims 1-8, which is located on the water passing plate and at the end of the corresponding blade. Insert a flexible steel bar through the threaded hole on the water passing plate and lead it out from the threaded hole at the end of the blade, then the cleaning of the water channel inside the corresponding blade is completed; Open the plug installed at the inner end in the radial direction of the water passing hole of the cylinder ring end plate. Pass a flexible steel bar through the water passing hole of the cylinder ring end plate and the corresponding end plate water passing hole in sequence, then the cleaning of a water channel inside the end plate is completed.

10. A method for maintaining a water passing device, characterized in that: Open the plug on the water passing device described in claim 8, which is located on the water passing plate and at the end of the corresponding blade. Insert a flexible steel bar through the threaded hole on the water passing plate and lead it out from the threaded hole at the end of the blade, then the cleaning of the water channel inside the corresponding blade is completed; Open the plug installed at the inner end in the radial direction of the water passing hole of the cylinder ring end plate. Pass a flexible steel bar through the water passing hole of the cylinder ring end plate and the corresponding end plate water passing hole in sequence, then the cleaning of a water channel inside the end plate is completed. When the pressure difference sensor alarms, replace the filter element of the filter where the pressure difference sensor is located.

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