Spraying device behind rack
By setting up a rear-mounted spray device on the hydraulic support of the coal mining working surface, and using the modified cooling water system to spray water and reduce dust and fire-proof and flame-retardant, the safety problem of natural fire in Laotang coal is solved, and a low-cost and efficient treatment effect is achieved.
Patent Information
- Application Number
- CN202421554808.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-03
- Publication Date
- 2025-05-09
- Estimated Expiration
- 2034-07-03
AI Technical Summary
In the intelligent and comprehensive mechanized coal mining work surface, the dynamic management of natural fire in Laotang coal has major challenges in production safety, and existing governance measures require a lot of manpower, material resources and funds.
A rear-frame spray device was designed, and the original cooling water system was used to transform it, and a new pipeline was introduced, which was installed on the hydraulic support of the coal mining working surface, so as to achieve the purpose of dust reduction, fire prevention and flame retardancy by spraying water.
By renovating the existing cooling water system, the device reduces economic costs and manpower investment, effectively controls the spontaneous combustion and ignition of the goaf, and has the advantages of low investment, simple operation and wide coverage.
Smart Images
Figure CN222848242U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of water spraying devices for coal mining working faces in coal mines, in particular to a rear-frame spraying device. Background Art
[0002] With the popularization and promotion of intelligent comprehensive mechanized coal mining faces, the number of workers on the face is constantly decreasing. At the same time, the dynamic control of spontaneous combustion of old pond coal during mining has become a top priority for safe production. The previous control measures mainly include spraying inhibitors and nitrogen injection in goafs, which require a lot of manpower, material resources and funds. Utility Model Content
[0003] The utility model aims to provide a rear spray device, which is arranged on a hydraulic support of a coal mining working face and can spray water to achieve the purpose of dust reduction and fire prevention.
[0004] The technical solution adopted is:
[0005] The rear-mounted spray device comprises a water supply pipe, a three-way joint, a flat stop valve, a spray valve, a support spray head, a ball valve and a rear-mounted spray head.
[0006] Connect the water supply pipe to the water inlet of the tee joint.
[0007] The second water outlet of the three-way joint is used to connect to the cooling water inlet of the conveyor motor.
[0008] Each hydraulic support on the coal mining working face is equipped with a flat stop valve, a spray valve, a support spray head, a ball valve and a rear spray head.
[0009] The spray valve and the support spray head are arranged on the top of the hydraulic support of the coal mining working face.
[0010] The ball valve and the rear spray head are arranged on the front connecting rod head side of the hydraulic support of the coal mining working face.
[0011] The first water outlet pipeline of the three-way joint is connected to the water inlet of the plane stop valve on the hydraulic support of the first coal mining working face.
[0012] The first water outlet of the plane stop valve is connected to the bracket spray head through a spray valve pipeline.
[0013] The second water outlet of the plane stop valve is connected to the spray head behind the frame through a ball valve pipeline.
[0014] The third water outlet of the plane stop valve of the hydraulic support of the previous coal mining working face is used as the water inlet pipeline to connect the water inlet of the plane stop valve of the hydraulic support of the rear coal mining working face.
[0015] An end ball valve is provided at the third water outlet of the plane stop valve of the hydraulic support of the last coal mining working face.
[0016] Its advantages are:
[0017] The utility model utilizes the original cooling water system for transformation and leads out a new pipeline to meet the needs of the mining site and reduce economic costs and manpower investment. After repeated demonstrations and tests, the spray liquid supply system of the hydraulic support of the coal mining working face is transformed, upgraded, designed and manufactured, achieving the purpose of sprinkling water, dust reduction, and water injection for flame retardancy and fire prevention, and effectively controlling the spontaneous combustion of the goaf, with the advantages of low investment, easy operation and wide coverage. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 It is a structural schematic diagram of the utility model.
[0019] Figure 2 for Figure 1 A partial enlargement of the left side.
[0020] Figure 3 It is a schematic diagram of the structure of the front connecting rod of the bracket and the spray head fixing bracket.
[0021] Figure 4 It is a schematic diagram of the structure of the support rod and the spray head seat.
[0022] Coal mining working face hydraulic support 1, U-shaped frame 2, support front connecting rod 3, spray valve 4, support spray head 5.
[0023] Ball valve 6, rear spray head 7, water supply pipe 8, flat stop valve 9, return water inlet pipe 10.
[0024] Runshun water inlet pipe 11, inlet ball valve 12, three-way joint 13, conveyor motor 14, top screw 15.
[0025] Support rod 16, spray head seat 17, adjusting bolt 18, end ball valve 19. DETAILED DESCRIPTION
[0026] The rear-frame spray device comprises a water supply pipe 8, a three-way joint 13, a plane stop valve 9 (φ25mm changed to φ13mm four-way ball valve), a spray valve 4 (single-control spray valve), a support spray head 5, a ball valve 6 and a rear-frame spray head 7.
[0027] The water supply pipe 8 is connected to the water inlet of the three-way joint 13 .
[0028] The second water outlet pipeline of the three-way joint 13 is connected to the cooling water inlet of the conveyor motor 14 .
[0029] Each hydraulic support 1 of the coal mining working face is provided with a plane stop valve 9, a spray valve 4, a support spray head 5, a ball valve 6 and a rear spray head 7.
[0030] The spray valve 4 and the support spray head 5 are fixedly arranged on the top of the hydraulic support 1 of the coal mining working face.
[0031] The ball valve 6 and the rear spray head 7 are fixedly arranged on the front connecting rod head side of the hydraulic support 1 of the coal mining working face.
[0032] The first water outlet pipeline (Φ25×2.5m high pressure hose) of the three-way joint 13 is connected to the water inlet of the plane stop valve 9 on the first coal mining face hydraulic support 1.
[0033] The first water outlet pipeline (φ13mm×5.5m high-pressure hose) of the plane stop valve 9 is connected to the spray valve 4 through the bracket spray head 5.
[0034] The second water outlet (φ13mm×1.5m high pressure hose) of the plane stop valve 9 is connected to the spray head 7 behind the frame through the ball valve 6 pipeline.
[0035] The third water outlet of the plane stop valve 9 of the hydraulic support 1 of the previous coal mining working face is used as a water inlet pipeline to connect the water inlet of the plane stop valve 9 of the hydraulic support 1 of the rear coal mining working face.
[0036] The third water outlet of the plane stop valve 9 of the hydraulic support 1 of the last coal mining working face is provided with an end ball valve 19 (φ25 mm).
[0037] Furthermore, an inlet ball valve 12 (φ25 mm) is provided on the first water outlet pipeline of the three-way joint 13 .
[0038] Further, a structure in which the rear spray head 7 is arranged on the front link rod 3 of the bracket can be:
[0039] The spray head fixing frame comprises a U-shaped frame 2, a support rod 16, a top screw 15 and a spray head seat 17.
[0040] Use the U-shaped frame 2 to cover the outside of the front connecting rod 3 of the bracket, open a screw hole on one side of the U-shaped frame 2 to set a top screw 15, and push the U-shaped frame 2 against the outside of the front connecting rod 3 of the bracket without damaging the front connecting rod 3 of the bracket.
[0041] A support rod 16 is fixed on the U-shaped frame 2 , and a support rod adjustment hole is provided on the support rod 16 .
[0042] The rear spray head 7 is arranged on the spray head seat 17, and the spray head seat 17 is provided with a spray head seat adjustment hole.
[0043] The spray head seat adjustment hole and the support rod adjustment hole are tightened by adjusting bolts 18 and fixed at a set angle.
[0044] The hydraulic support 1 of the coal mining face can be: N2-409 intelligent comprehensive mining face support, model ZY6800 / 15 / 35, each group of hydraulic support 1 of the coal mining face is equipped with a flat stop valve 9 (i.e., a four-way ball valve), the main pipe is connected with a φ25mm×2.5m high-pressure hose, and the output port to the spray head is two φ13mm interfaces, which respectively supply liquid to the φ13mm×5.5m and φ13mm×1.5m pipelines of the hydraulic support 1 of the coal mining face. The spray head 7 behind the frame adopts a coal mining machine external spray nozzle to achieve the expected effect, which is connected to the self-made spray head fixing frame and equipped with a ball valve 6 to control the flow. The spray head fixing frame is independently designed, fixed on the front connecting rod head side of the support, and the pitch angle can be freely adjusted. According to the mining height of the hydraulic support 1 of the coal mining face, the best spray angle and coverage area are achieved, so that the required spray direction and angle can be achieved. During the test, the cutting depth was 0.8m, and each time the frame was moved, the spraying lasted for 10-15 minutes, achieving the fire retardant and dust reduction effects, effectively preventing and controlling the hazards of spontaneous combustion in the Laotang goaf, and achieving the expected goal of fire prevention and extinguishing. Through small modifications and investments, we have gained greater benefits, saved a lot of labor costs, and achieved the best results. It can be promoted and used to ensure safe production.
[0045] In order to ensure the flow rate and water pressure of the liquid supply, the hydraulic support 1 of the coal mining working face of the working face 179 groups can adopt segmented independent liquid supply. The water supply pipe 8 used by the first section 1-90 coal mining working face hydraulic support 1 is the known Yunshun water supply pipeline 11 for liquid supply and the cooling water circuit of the conveyor motor 14. In front of the head No. 1 frame, a pipeline is reversed with a three-way joint 13 as the water supply pipeline of the plane stop valve 9. The start and stop of the spray is controlled by the inlet ball valve 12. The water supply pipe 8 used by the second section 91-179 coal mining working face hydraulic support 1 is the Huishun water supply pipeline for liquid supply. (The connection structure steps and methods are the same as the first section). The water supply pipe 8 is supplied by a water pump and a water tank.
Claims
1. A rear-mounted spray device, comprising a water supply pipe (8), a three-way joint (13), a flat stop valve (9), a spray valve (4), a support spray head (5), a ball valve (6) and a rear-mounted spray head (7); characterized in that: The water supply pipe (8) is connected to the water inlet of the three-way joint (13); The second water outlet of the three-way joint (13) is used to connect to the cooling water inlet of the conveyor motor (14); Each coal mining face hydraulic support (1) is provided with a plane stop valve (9), a spray valve (4), a support spray head (5), a ball valve (6) and a rear support spray head (7); The spray valve (4) and the support spray head (5) are arranged on the top of the hydraulic support (1) of the coal mining working face; The ball valve (6) and the rear spray head (7) are arranged on the front connecting rod head side of the hydraulic support (1) of the coal mining working face; A first water outlet pipeline of the three-way joint (13) is connected to a water inlet of a plane stop valve (9) on a first coal mining face hydraulic support (1); The first water outlet of the plane stop valve (9) is connected to the bracket spray head (5) through the spray valve (4) pipeline; The second water outlet of the plane stop valve (9) is connected to the spray head (7) behind the frame through the ball valve (6) pipeline; The third water outlet of the plane stop valve (9) of the hydraulic support (1) of the front coal mining working face is used as a water inlet pipeline to connect the water inlet of the plane stop valve (9) of the hydraulic support (1) of the rear coal mining working face; The third water outlet of the plane stop valve (9) of the hydraulic support (1) of the last coal mining working face is provided with an end ball valve (19).
2. The rear spray device according to claim 1, characterized in that: An inlet ball valve (12) is provided on the first water outlet pipeline of the three-way joint (13).
3. The rear spray device according to claim 1, characterized in that: The rear spray head (7) is arranged on the front connecting rod head side through the spray head fixing frame; A spray head fixing frame, comprising a U-shaped frame (2), a support rod (16), a top screw (15) and a spray head seat (17); The U-shaped frame (2) is sleeved on the outside of the front connecting rod (3) of the bracket, a screw hole is opened on one side of the U-shaped frame (2) to set a top screw (15), and the U-shaped frame (2) is pushed against the outside of the front connecting rod (3) of the bracket; A support rod (16) is fixed on the U-shaped frame (2), and a support rod adjustment hole is provided on the support rod (16); The rear spray head (7) is arranged on a spray head seat (17), and a spray head seat adjustment hole is provided on the spray head seat (17); the spray head seat adjustment hole and the support rod adjustment hole are tightened and fixed by adjusting bolts (18).