A fireproof coating spraying device for underground coal mines

Abstract

This invention discloses a fireproof coating spraying device for underground coal mines, comprising: a sliding ground rail, an embedded frame on the underground surface of the coal mine, a drive frame slidably mounted on the sliding ground rail, two robotic arms mounted front and rear on the drive frame, a spraying mechanism mounted on the robotic arm located on the front side of the drive frame, and a coating mechanism mounted on the robotic arm located on the rear side of the drive frame, the spraying mechanism being able to preferentially spray fireproof material onto the rock walls of the underground coal mine roadway, and the coating mechanism filling gaps in the fireproof sealing layer formed after spraying, and a storage tank installed on the drive frame, the storage tank being connected to the coating mechanism and the spraying mechanism.

Description

Technical Field

[0001] This invention belongs to the technical field of fireproof coating equipment, specifically a fireproof coating spraying device for underground coal mines. Background Technology

[0002] Fire-retardant coatings for underground coal mines are mainly applied to the surfaces of underground roadways to provide fire protection and slow the spread of fire. Underground coal mines present a high risk of fire, therefore, fire-retardant coatings can effectively improve mine safety. Current technologies often employ manual spraying to apply a fire-retardant coating to surfaces such as walls, ceilings, and floors. However, due to limited working space, operators struggle to precisely control the distance, angle, and speed of the spraying equipment, resulting in uneven coating coverage, over-spraying, or missed areas. Particularly concerning is the coating quality, especially in situations with insufficient mine lighting or where the coating cannot be directly observed, making it impossible to identify gaps in the coating application. Therefore, it is necessary to provide an underground fire-retardant coating spraying device to address the problems mentioned in the background technology. Summary of the Invention

[0003] To achieve the above objectives, the present invention provides the following technical solution: a fireproof coating spraying device for underground coal mines, comprising: a sliding ground rail, an embedded frame mounted on the underground surface of a coal mine, a drive frame slidably mounted on the sliding ground rail, two robotic arms mounted front and rear on the drive frame, a spraying mechanism mounted on the robotic arm located on the front side of the drive frame, and a coating mechanism mounted on the robotic arm located on the rear side of the drive frame, the spraying mechanism being able to preferentially spray fireproof material onto the rock walls of underground coal mine roadways, and the coating mechanism filling gaps in the fireproof sealing layer formed after spraying, a storage tank being installed on the drive frame, and the storage tank being connected to the coating mechanism and the spraying mechanism.

[0004] Furthermore, preferably, the coating mechanism and the spraying mechanism have the same structure and both include: a positioning frame fixed to one end of the robotic arm, on which multiple spraying components are slidably arranged, each spraying component being connected to two connecting rods, the two connecting rods being arranged in an X-shape and the connecting rods on adjacent spraying components being rotatably connected, and a telescopic adjustment rod being laterally fixed in the middle of the positioning frame, the telescopic end of the telescopic adjustment rod being connected to the hinged end of the connecting rod located in the opposite middle.

[0005] Furthermore, preferably, each of the spraying components is arranged in a stepped manner in the vertical direction.

[0006] Furthermore, preferably, the spraying assembly includes:

[0007] The main body has an outer tube connected laterally on one side;

[0008] A connecting pipe is fixed to one side of the outer pipe, and an inner pipe is slidably disposed inside the outer pipe, with one end of the inner pipe slidably connected inside the connecting pipe;

[0009] A jet head is installed at one end of the connecting pipe, and the jet head has multiple jet holes distributed on it.

[0010] An outer ring chamber is sleeved outside the connecting pipe. Two side pipes are symmetrically arranged on the outer pipe, one end of each side pipe communicating with the outer pipe, and the other end of each side pipe communicating with the outer ring chamber.

[0011] The side nozzle is installed on one side of the outer pipe and is connected to the outer ring chamber through a section pipe.

[0012] Furthermore, as a preferred embodiment, a support spring is sleeved on the inner tube, one end of the support spring abuts against the outer tube, a ball plug is coaxially fixed inside the outer tube, the ball plug is deeply disposed inside the outer tube, and a flow-blocking ring frame is embedded and fixed inside the outer tube, and a fixed bushing is sleeved on the inner tube, the fixed bushing slidingly engaging with the flow-blocking ring frame.

[0013] Furthermore, as a preferred embodiment, the inner tube is provided with a bullet-shaped flow channel at the ball plug position, so that when the inner tube slides towards the side closer to the connecting tube, the ball plug gradually disengages from the flow channel in the inner tube, and at this time the drainage gap between the fixed bushing and the flow-blocking ring gradually decreases.

[0014] Furthermore, as a preferred embodiment, a replenishment cavity is fixed on the side wall of the outer tube, and adhesive is stored and delivered in the replenishment cavity through the outer tube. The replenishment cavity is connected to the outer ring chamber through a branch pipe, and a collar is coaxially fixed in the outer ring chamber.

[0015] Furthermore, as a preferred embodiment, the side nozzle is rotatably connected to the outer tube, and the outer tube is provided with a fine-tuning telescopic rod, one end of which is connected to the side nozzle; a shaping roller is also rotatably provided on one side of the nozzle.

[0016] Furthermore, as a preferred embodiment, a gap pressure roller is provided between the coating mechanism and the spraying mechanism. The gap pressure roller rolls the sprayed nozzles in the spraying mechanism to form a separation gap and forms a filling groove. The coating mechanism then covers the filling groove with coating.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] 1. In this invention, a spraying mechanism is used to initially spray fireproof material onto the surface of underground roadways in coal mines, and a subsequent overcoating mechanism can fill gaps in the fireproof sealing layer formed after spraying and form a complete fireproof coating, thereby ensuring fireproof performance.

[0019] 2. The spraying assembly used in this invention can spray the main fireproof material through the spray head, while the side spray head can spray the edge. The shaping roller can squeeze the side during spraying. Thus, when multiple spraying assemblies spray simultaneously, the side spray head in the relatively lower spraying assembly can fill the gaps caused by the side squeezing and form a fireproof coating layered in sequence, thereby improving the spraying sealing performance. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the present invention;

[0021] Figure 2 This is a schematic diagram of the spraying mechanism in this invention;

[0022] Figure 3 This is a schematic diagram showing the arrangement and distribution of the spraying components in this invention;

[0023] Figure 4 This is a schematic diagram of the spraying assembly in this invention;

[0024] Figure 5 This is a schematic diagram of the flow-blocking ring frame in this invention;

[0025] Figure 6 This is a schematic diagram of the fire-retardant coating spraying process in this invention;

[0026] In the diagram: 1. Drive frame; 11. Sliding rail; 12. Storage tank; 13. Robotic arm; 2. Coating mechanism; 3. Spraying mechanism; 31. Positioning frame; 32. Connecting rod; 33. Telescopic adjusting rod; 4. Spraying assembly; 41. Main body; 42. Outer pipe; 43. Connecting pipe; 44. Inner pipe; 45. Spray head; 46. Outer ring chamber; 47. Side spray head; 48. Side pipe; 5. Flow-blocking ring frame; 51. Fixed bushing; 52. Ball plug; 53. Refill chamber; 54. Shaping roller; 55. Shaping collar. Detailed Implementation

[0027] Please see Figure 1In this embodiment of the invention, a coal mine underground fireproof coating spraying device includes: a sliding ground rail 11, buried on the underground surface of the coal mine; a drive frame 1 slidably mounted on the sliding ground rail 11; two robotic arms 13 arranged front and rear on the drive frame 1; a spraying mechanism 3 is mounted on the robotic arm 13 located on the front side of the drive frame 1; and a coating mechanism 2 is mounted on the robotic arm 13 located on the rear side of the frame. The spraying mechanism 3 can preferentially spray fireproof coating on the rock walls of the underground coal mine roadway. The fireproof material is used in the coating mechanism 2 to fill gaps in the fireproof sealing layer formed after spraying. A storage tank 12 is installed on the drive frame 1, and the storage tank is filled with fireproof material. The storage tank 12 is connected to the coating mechanism 2 and the spraying mechanism 3. That is to say, the fireproof coating is sprayed in two steps: preliminary spraying, in which the spraying mechanism is used to spray the surface of the underground roadway of the coal mine to make it smooth, and secondary spraying, in which the coating mechanism is used to fill gaps in the fireproof sealing layer after spraying and form a complete fireproof coating.

[0028] See Figure 2 In this embodiment, the coating mechanism 2 and the spraying mechanism 3 have the same structure and both include: a positioning frame 31, fixed to one end of the robotic arm 13. Multiple spraying components 4 are slidably arranged on the positioning frame 31. Each spraying component 4 is connected to two connecting rods 32. The two connecting rods 32 are arranged in an X-shape and the connecting rods 32 on adjacent spraying components 4 are rotatably connected. A telescopic adjustment rod 33 is horizontally fixed in the middle of the positioning frame 31. The telescopic end of the telescopic adjustment rod 33 is connected to the hinged end of the connecting rod 32 located in the middle. The telescopic adjustment rod can synchronously drive the spraying components to adjust the gap through each connecting rod under telescopic adjustment, so as to control the spraying gap.

[0029] See Figure 3 In a preferred embodiment, each of the spraying components 4 is arranged in a stepped manner in the vertical direction. That is, when multiple spraying components in the spraying mechanism are working, the spraying component located at the upper position can be in the front position, and the spraying component located at the lower position can be in the rear position, and spraying operations are performed simultaneously.

[0030] See Figure 4 In this embodiment, the spraying assembly 4 includes:

[0031] The main body 41 has an outer tube 42 connected laterally on one side;

[0032] A connecting pipe 43 is fixed to one side of an outer pipe 42. An inner pipe 44 is slidably disposed inside the outer pipe 42, and one end of the inner pipe 44 is slidably connected inside the connecting pipe 43.

[0033] A nozzle 45 is installed at one end of the connecting pipe 43, and a plurality of jet holes are distributed on the nozzle 45;

[0034] An outer ring chamber 46 is sleeved outside the connecting pipe 43. Two side pipes 48 are symmetrically arranged on the outer pipe 42. One end of each side pipe 48 is connected to the outer pipe 42, and the other end is connected to the outer ring chamber 46.

[0035] Side nozzle 47 is installed on one side of the outer pipe 42 and is connected to the outer ring chamber 46 through a section pipe. The side nozzle can perform fireproof coating spraying operation synchronously with the spray head.

[0036] See Figure 5 In this embodiment, a support spring is sleeved on the inner tube 44, and one end of the support spring abuts against the outer tube 42. A ball plug 52 is coaxially fixed inside the outer tube 42, and the ball plug 52 is deeply embedded in the outer tube 42. A flow-blocking ring frame 5 is embedded and fixed inside the outer tube 42. A fixed bushing 51 is sleeved on the inner tube 44, and the fixed bushing 51 slides in cooperation with the flow-blocking ring frame 5. That is, the relative unit spray volume between the side nozzle and the spray head is adjusted by controlling the flow pressure of the fireproof material in the outer tube. When the flow pressure of the fireproof material in the outer tube is high, the fireproof material can push the inner tube to slide horizontally closer to the side of the connecting pipe. At this time, the drainage gap between the flow-blocking ring and the fixed bushing becomes smaller, while the drainage gap between the inner tube and the ball plug becomes larger, thereby making the unit flow volume of the fireproof material in the side nozzle smaller and the unit flow volume of the fireproof material in the spray head larger. When the flow pressure of the fireproof material in the outer tube is low, the opposite is true.

[0037] In this embodiment, a bullet-shaped flow channel is provided in the inner tube 44 at the position of the ball plug 52, so that when the inner tube 44 slides towards the side closer to the connecting tube 43, the ball plug 52 gradually disengages from the flow channel in the inner tube 44, and at this time the drainage gap between the fixed bushing 51 and the flow-blocking ring 5 gradually decreases.

[0038] In a preferred embodiment, a replenishment chamber 53 is also fixed on the side wall of the outer tube 42. Adhesive is stored in the replenishment chamber 53 through the outer tube. The replenishment chamber 53 is connected to the outer ring chamber 46 through a branch pipe. A collar 55 is also coaxially fixed in the outer ring chamber 46. In particular, the adhesive is mixed into the fireproof material and sprayed out under high pressure with the side nozzle, thereby improving the adhesion and sealing of the coating.

[0039] In this embodiment, the side nozzle 47 is rotatably connected to the outer tube 42, and the outer tube 42 is provided with a fine-adjustment telescopic rod. One end of the fine-adjustment telescopic rod is connected to the side nozzle 47. A shaping roller 54 is also rotatably provided on one side of the spray head 45. The shaping roller mainly squeezes the lower edge of the fireproof coating sprayed by the spray head and forms a spray gap so that the side nozzles on the adjacent spraying assembly can fill it later.

[0040] See Figure 6 In this embodiment, a gap pressure roller (not shown in the figure) is provided between the coating mechanism 2 and the spraying mechanism 3. The gap pressure roller rolls the sprayed nozzles in the spraying mechanism 3 to form a separation gap and form a filling groove. The coating mechanism 2 covers the filling groove with spray to improve the sealing and ensure the spraying quality.

[0041] Specifically, as the drive frame moves along the sliding ground rail, the spraying mechanism can spray a fireproof coating onto the sidewalls of underground coal mine roadways. The spraying assembly sprays the main fireproof material through the spray nozzle, while the side nozzles spray the edges. The shaping roller mainly squeezes the lower edge of the fireproof coating formed by the spray nozzle, creating a spray gap so that the side nozzles on the adjacent spraying assembly can fill it, forming a series of stacked fireproof coatings and improving the spray sealing. After the pressure roller rolls the sprayed material to form a gap and creates a filling groove, the overcoating mechanism covers the filling groove with a final spray.

[0042] This design for applying fire-resistant coatings to underground coal mine roadways has the following advantages:

[0043] 1. Main spray and side nozzles of the spraying assembly: The spraying assembly performs the main spray through the spray nozzles, ensuring a complete coverage of the fire-retardant coating on the tunnel sidewalls. Simultaneously, the side nozzles can perform edge spraying, ensuring coverage of the sprayed edge areas and improving the overall uniformity and consistency of the coating.

[0044] 2. Formation of spray gaps by the shaping roller: The shaping roller compresses the lower edge of the fire-retardant coating sprayed from the nozzle, creating spray gaps. This design allows the side nozzles on adjacent spraying units to fill these gaps, forming a series of stacked fire-retardant coatings. This spraying method improves the sealing and tightness of the coating layer.

[0045] 3. Rolling and filling groove formation by pressure rollers: The gaps formed by spraying are rolled by pressure rollers to make the sprayed coating more uniform and dense. Subsequently, filling grooves are formed, which can hold more fire-retardant coating material, further enhancing the thickness and density of the fire-retardant coating.

[0046] 4. Recoating by the coating unit: The coating unit recoats the filling tank to ensure that the filling tank is filled with fire-retardant coating material, further improving the density and integrity of the coating.

[0047] This design allows for complete coverage of the sidewalls of coal mine roadways, forming a uniform, dense, and sufficiently thick fire-resistant coating. This coating effectively isolates high temperatures and flames, slowing the spread of fire and improving the fire safety of the mine. Furthermore, this design enhances the sealing and consistency of the sprayed coating, ensuring its quality and reliability.

[0048] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A coal mine underground fireproof coating spraying device, characterized in that: The utility model relates to a coal mine tunnel fireproofing material spraying device, including sliding ground rail (11), the sliding ground rail (11) is buried in the architecture on the coal mine underground ground, the sliding ground rail (11) is provided with drive vehicle frame (1) on the sliding, two mechanical arms (13) are provided with on drive vehicle frame (1) front and back, the mechanical arm (13) on drive vehicle frame (1) front side is provided with spraying mechanism (3), the mechanical arm (13) on the rear side of vehicle frame is provided with coating mechanism (2), spraying mechanism (3) can spray fireproofing material on the coal mine tunnel rock wall in advance, coating mechanism (2) carries out the gap to spray the sealing layer of formation and lacks, drive vehicle frame (1) is installed with storage tank (12), and the storage tank (12) is linked together with coating mechanism (2) and spraying mechanism (3). The composition structure of the coating mechanism (2) and the spraying mechanism (3) is the same, and they jointly comprise: a positioning frame (31) fixed to one end of the mechanical arm (13), a plurality of spraying assemblies (4) slidably arranged on the positioning frame (31), two connecting rods (32) connected to each of the spraying assemblies (4), the two connecting rods (32) arranged in an X-shaped cross, and the connecting rods (32) on adjacent spraying assemblies (4) rotatably connected, a telescopic adjusting rod (33) transversely fixed to the middle part of the positioning frame (31), and the telescopic end of the telescopic adjusting rod (33) connected to the hinged end of the connecting rod (32) located at the opposite middle part. The spraying assembly (4) comprises: a main pipe body (41) having an outer pipe (42) connected transversely to one side thereof; a connecting pipe (43) fixed to one side of the outer pipe (42), an inner pipe (44) slidably arranged in the outer pipe (42), and one end of the inner pipe (44) slidably connected in the connecting pipe (43); a jet head (45) installed at one end of the connecting pipe (43), the jet head (45) having a plurality of jet holes distributed thereon; an outer ring bin (46) sleeved on the connecting pipe (43), two side pipes (48) symmetrically arranged on the outer pipe (42), one end of each side pipe (48) communicated with the outer pipe (42), and the other end communicated with the outer ring bin (46); a side jet head (47) installed on one side of the outer pipe (42) and communicated with the outer ring bin (46) through a joint pipe.

2. The coal mine underground fireproof coating spraying device according to claim 1, characterized in that: Each spraying assembly (4) is arranged in a stepped manner in the vertical direction.

3. The coal mine underground fireproof coating spraying device according to claim 1, characterized in that: A supporting spring is sleeved on the inner pipe (44), one end of the supporting spring in abutting contact with the outer pipe (42), a ball plug (52) coaxially fixed in the outer pipe (42), the ball plug (52) deeply arranged in the outer pipe (42), a flow resistance ring frame (5) embedded and fixed in the outer pipe (42), a fixed shaft sleeve (51) sleeved on the inner pipe (44), and the fixed shaft sleeve (51) slidably matched with the flow resistance ring frame (5).

4. The coal mine underground fireproof coating spraying device according to claim 3, characterized in that: The inner tube (44) is provided with a bullet-shaped flow channel at the position of the ball plug (52), so that when the inner tube (44) slides towards the side close to the connecting tube (43), the ball plug (52) gradually leaves the flow channel in the inner tube (44), at this time, the drainage gap between the fixed shaft sleeve (51) and the flow ring holder (5) gradually becomes smaller.

5. The coal mine underground fireproof coating spraying device according to claim 1, characterized in that: The outer tube (42) is further provided with a side wall fixed with a supplement cavity (53), the supplement cavity (53) is stored with an adhesive through an external connecting tube, the supplement cavity (53) is connected with the outer ring cavity (46) through a branch pipe, and the outer ring cavity (46) is further coaxially fixed with a shaft ring (55).

6. The coal mine underground fireproof coating spraying device according to claim 1, characterized in that: The side nozzle (47) is rotatably connected to the outer tube (42), the outer tube (42) is provided with a fine adjustment telescopic rod, one end of the fine adjustment telescopic rod is connected with the side nozzle (47); one side of the injection head (45) is further rotatably provided with a shaping roller (54).

7. The coal mine underground fireproof coating spraying device according to claim 1, characterized in that: The coating mechanism (2) and the spraying mechanism (3) are provided with a gap pressure roller, the gap pressure roller rolls and presses the separated gap formed by each injection head of the spraying mechanism (3), and forms a filling groove, and the coating mechanism (2) covers and sprays the filling groove.

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