Grouting device for coal mine fire prevention

Abstract

The grouting device comprises a slurry pipeline and an injection pipe, the slurry pipeline is installed on the side wall of the injection pipe in an inserted mode, the slurry pipeline is connected with an external pump, a spray head is installed at the end, away from the slurry pipeline, of the injection pipe, an annular groove is formed in the side wall of the injection pipe, and internal threads are arranged on the inner side wall of the annular groove; the outer side of the spray head is provided with an external thread, the spray head can be installed in the annular groove in a screwed mode, one end of a connecting rod is installed on the side wall of the injection pipe, a scraping ring is installed at the other end of the connecting rod, the connecting rod and the scraping ring are installed in the spray head in an inserted mode, and the scraping ring is attached to the inner wall of the spray head. According to the device, the connecting rod and the scraping ring are arranged on the side, connected with the spraying head, of the spraying pipe, so that when the spraying head needs to be cleaned, the spraying head can be screwed into the annular groove, then the spraying head is pulled outwards, slurry attached to the interior of the spraying head is scraped out through the scraping ring, and it is avoided that the slurry is condensed, and next use is affected.

Description

Technical Field

[0001] This patent design relates to the technical field of grouting devices, specifically a grouting device for coal mine fire prevention. Background Art

[0002] At present, during the withdrawal process of the fully mechanized caving working face in the flammable coal seam in the coal mine, the roof is broken due to the influence of the mine pressure, resulting in a lot of floating coal, which is easy to spontaneously float. In order to prevent the spontaneous floating coal, grouting is generally performed on the floating coal underground.

[0003] In a coal mine fire prevention grouting device proposed in publication number CN219061744U, a scraper ring is pushed to move and scrape the inner wall of the nozzle body by a hinge, and at the same time, the slurry is washed by spraying water through the spray ring, so that the cleaning effect of the inner wall of the nozzle body is better;

[0004] However, in the above document, since the hinge is also located inside the nozzle body, after use, slurry will adhere to the surface of the hinge, which will affect the use of the hinge after solidification, making it impossible for the scraper ring to clean the inner wall of the nozzle body. Utility Model Content

[0005] The purpose of this patent is to provide a grouting device for coal mine fire prevention to solve the problems raised in the above background technology.

[0006] To achieve the above purpose, this patent provides the following technical solutions: a grouting device for coal mine fire prevention, comprising a slurry pipeline and an injection pipe, wherein a slurry pipeline is inserted into the side wall of the injection pipe, the slurry pipeline is connected to an external pump, and a nozzle is installed at one end of the injection pipe away from the slurry pipeline;

[0007] The side wall of the injection pipe is provided with an annular groove, the inner side wall of the annular groove is provided with an internal thread, the outer side of the nozzle is provided with an external thread, the nozzle can be screwed into the annular groove, one end of a connecting rod is installed on the side wall of the injection pipe, a scraper ring is installed on the other end of the connecting rod, the connecting rod and the scraper ring are inserted and installed in the nozzle, and the scraper ring is in contact with the inner wall of the nozzle;

[0008] A material removal mechanism is installed on the side wall of one end of the nozzle inserted into the annular groove, and the material removal mechanism can clean the side wall of the scraper ring.

[0009] Preferably, the material removal mechanism includes a slot, an insert plate and an inclined plate. A slot is provided at one end of the nozzle inserted into the annular groove. An insert plate is inserted and installed in the slot. An inclined plate is installed at one end of the insert plate located outside the slot. The inclined plate can fit with the side wall of the scraper ring.

[0010] Preferably, a connecting ring is installed on the outside of the slurry pipe, the inner wall of the connecting ring is provided with an internal thread, and the outer wall of the injection pipe is provided with an external thread. The connecting ring can be rotatably installed on the outside of the injection pipe, and a rubber ring is sleeved on the outside of one end of the slurry pipe inserted into the injection pipe, and the rubber ring fits against the inner wall of the injection pipe.

[0011] Preferably, the nozzle comprises a connecting pipe and a conical nozzle, the connecting pipe is screwed into and installed in the annular groove, and the conical nozzle is screwedly installed below the connecting pipe.

[0012] Preferably, a fixing rod is installed on the lower wall of the connecting pipe, and a handle is installed on the outer side of the fixing rod.

[0013] Preferably, a clearance hole is opened on the inner side wall of the annular groove, and the inclined plate can be inserted and installed in the clearance hole. A sealing ring is fitted on the inner side wall of the annular groove.

[0014] Compared with the prior art, the beneficial effects of this patent are:

[0015] The device is provided with a connecting rod and a scraper ring on the side where the spray pipe is connected to the nozzle, so that when the nozzle needs to be cleaned, the nozzle can be screwed into the annular groove, and then the nozzle is pulled outward to scrape the slurry attached to the nozzle through the scraper ring, so as to avoid the slurry condensation and affect the next use. In addition, the structure of this part is simple, and there will be no problem that the scraper ring cannot be moved;

[0016] Secondly, the device is also provided with a material removal mechanism on the side wall of the nozzle, through which the slurry adhered to the outside of the scraper ring can be scraped off, so that the cleaning effect of the scraper ring can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the structure of this patent.

[0018] Figure 2 This is a schematic diagram of the structure when the spray pipe and the spray head of this patent are separated.

[0019] Figure 3 This is a cross-sectional view of this patent.

[0020] Figure 4 for Figure 3 Schematic diagram of the structure at point A in the middle.

[0021] In the figure: 1 slurry pipeline, 2 injection pipe, 3 nozzle, 4 annular groove, 5 connecting rod, 6 scraper ring, 7 material removal mechanism, 8 connecting ring, 9 rubber ring, 10 fixing rod, 11 handle, 12 clearance hole, 13 sealing ring, 31 connecting pipe, 32 conical nozzle, 71 slot, 72 plug plate, 73 inclined plate. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of this patent to clearly and completely describe the technical solutions in the embodiments of this patent. Obviously, the described embodiments are only part of the embodiments of this patent, not all of them. Based on the embodiments in this patent, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this patent.

[0023] See also Figure 1-4 This patent provides a technical solution: a grouting device for coal mine fire prevention, including a slurry pipeline 1 and a jet pipe 2, the side wall of the jet pipe 2 is inserted with the slurry pipeline 1, the slurry pipeline 1 is connected to an external pump, and a nozzle 3 is installed at one end of the jet pipe 2 away from the slurry pipeline 1;

[0024] An annular groove 4 is provided on the side wall of the injection pipe 2, and an inner wall of the annular groove 4 is provided with an internal thread. An outer side of the nozzle 3 is provided with an external thread. The nozzle 3 can be screwed into the annular groove 4. One end of a connecting rod 5 is installed on the side wall of the injection pipe 2, and a scraper ring 6 is installed on the other end of the connecting rod 5. The connecting rod 5 and the scraper ring 6 are inserted and installed in the nozzle 3, and the scraper ring 6 fits the inner wall of the nozzle 3.

[0025] A material removal mechanism 7 is installed on the side wall of one end of the nozzle 3 inserted into the annular groove 4, and the material removal mechanism 7 can clean the side wall of the scraper ring 6;

[0026] The scraper ring 6 provided in this article is directly installed on the side wall of the injection pipe 2 through the connecting rod 5. It has a simple structure and does not have some hinges, so that after grouting, the remaining slurry will not hinder the movement of the scraper ring 6;

[0027] When the nozzle 3 needs to be cleaned, it is only necessary to unscrew the nozzle 3 from the annular groove 4, and then pull the nozzle 3 to the side away from the injection pipe 2 through the fixing rod 10. During the pulling process, the scraper ring 6 can scrape off the slurry attached to the inner wall of the nozzle 3;

[0028] After the scraper ring 6 moves to one side of the inclined plate 73 in the material removal mechanism 7, the nozzle 3 can be controlled to rotate so that the slurry adhered to the outer wall of the scraper ring 6 can be scraped off through the inclined plate 73, and then the scraper ring 6 is inserted into the nozzle 3. After several reciprocating movements, the nozzle 3 can be cleaned to avoid clogging of the nozzle 3 due to the retained slurry, which would affect the next use.

[0029] Specifically, the material removal mechanism 7 includes a slot 71, an insert plate 72 and an inclined plate 73. A slot 71 is provided at one end of the nozzle 3 inserted into the annular groove 4. An insert plate 72 is inserted and installed in the slot 71. An inclined plate 73 is installed at one end of the insert plate 72 located outside the slot 71. The inclined plate 73 can fit with the side wall of the scraper ring 6.

[0030] Specifically, a connecting ring 8 is installed on the outside of the slurry pipe 1, the inner wall of the connecting ring 8 is provided with an internal thread, and the outer wall of the injection pipe 2 is provided with an external thread. The connecting ring 8 can be rotatably installed on the outside of the injection pipe 2, and a rubber ring 9 is sleeved on the outside of one end of the slurry pipe 1 inserted into the injection pipe 2, and the rubber ring 9 is in contact with the inner wall of the injection pipe 2;

[0031] By repeatedly pumping and pulling the slurry pipe 1, the inner wall of the injection pipe 2 can be cleaned under the action of the rubber ring 9.

[0032] Specifically, the nozzle 3 includes a connecting pipe 31 and a conical nozzle 32. The connecting pipe 31 is screwed into the annular groove 4, and the conical nozzle 32 is screwed under the connecting pipe 31.

[0033] The conical nozzle 32 can be removed from the connecting pipe 31, making it convenient to clean the conical nozzle 32. After the conical nozzle 32 is removed, the slurry can be discharged from the connecting end of the connecting pipe 31 and the conical nozzle 32 when the scraper ring 6 moves into the nozzle 3.

[0034] Specifically, a fixing rod 10 is installed on the lower wall of the connecting pipe 31 , and a handle 11 is installed on the outer side of the fixing rod 10 .

[0035] Specifically, the inner wall of the annular groove 4 is provided with a clearance hole 12, the inclined plate 73 can be inserted and installed in the clearance hole 12, and the inner wall of the annular groove 4 is fitted with a sealing ring 13;

[0036] The provision of the sealing ring 13 can prevent the slurry from leaking from the connection between the nozzle 3 and the injection pipe 2 during grouting of the device, thereby ensuring the sealing performance of the device.

[0037] Working principle: When the nozzle 3 needs to be cleaned, it is only necessary to unscrew the nozzle 3 from the annular groove 4, and then pull the nozzle 3 to the side away from the injection pipe 2 through the fixing rod 10. During the pulling process, the scraper ring 6 can scrape off the slurry attached to the inner wall of the nozzle 3;

[0038] After the scraper ring 6 moves to one side of the inclined plate 73 in the material removal mechanism 7, the nozzle 3 can be controlled to rotate so that the slurry adhered to the outer wall of the scraper ring 6 can be scraped off through the inclined plate 73, and then the scraper ring 6 is inserted into the nozzle 3. After several reciprocating movements, the nozzle 3 can be cleaned to avoid clogging of the nozzle 3 due to the retained slurry, which would affect the next use.

[0039] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered exemplary and non-restrictive in all respects, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0040] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A grouting device for coal mine fire prevention, comprising a slurry pipeline (1) and an injection pipe (2), characterized in that: A slurry pipeline (1) is inserted into the side wall of the injection pipe (2), the slurry pipeline (1) is connected to an external pump, and a nozzle (3) is installed at one end of the injection pipe (2) away from the slurry pipeline (1); The side wall of the injection pipe (2) is provided with an annular groove (4), the inner side wall of the annular groove (4) is provided with an internal thread, the outer side of the injection head (3) is provided with an external thread, the injection head (3) can be screwed into the annular groove (4), one end of a connecting rod (5) is installed on the side wall of the injection pipe (2), the other end of the connecting rod (5) is installed with a scraper ring (6), the connecting rod (5) and the scraper ring (6) are inserted and installed in the injection head (3), and the scraper ring (6) is in contact with the inner wall of the injection head (3); A material removal mechanism (7) is installed on the side wall of one end of the nozzle (3) inserted into the annular groove (4), and the material removal mechanism (7) can clean the side wall of the scraper ring (6).

2. A grouting device for coal mine fire prevention according to claim 1, characterized in that: The material removal mechanism (7) comprises a slot (71), an insert plate (72) and an inclined plate (73); the end of the nozzle (3) inserted into the annular groove (4) is provided with a slot (71); the insert plate (72) is inserted and installed in the slot (71); the end of the insert plate (72) located outside the slot (71) is provided with an inclined plate (73); the inclined plate (73) can be fitted with the side wall of the scraper ring (6).

3. A grouting device for coal mine fire prevention according to claim 1, characterized in that: A connecting ring (8) is installed on the outer side of the slurry pipe (1), and the inner wall of the connecting ring (8) is provided with an internal thread. The outer wall of the injection pipe (2) is provided with an external thread. The connecting ring (8) can be rotatably installed on the outer side of the injection pipe (2). A rubber ring (9) is sleeved on the outer side of one end of the slurry pipe (1) inserted into the injection pipe (2), and the rubber ring (9) is in contact with the inner wall of the injection pipe (2).

4. A grouting device for coal mine fire prevention according to claim 1, characterized in that: The nozzle (3) comprises a connecting pipe (31) and a conical nozzle (32); the connecting pipe (31) is screwed into the annular groove (4); and the conical nozzle (32) is screwedly installed below the connecting pipe (31).

5. A grouting device for coal mine fire prevention according to claim 4, characterized in that: A fixing rod (10) is installed on the lower wall of the connecting pipe (31), and a handle (11) is installed on the outer side of the fixing rod (10).

6. A grouting device for coal mine fire prevention according to claim 2, characterized in that: The inner side wall of the annular groove (4) is provided with a clearance hole (12), the inclined plate (73) can be inserted and installed in the clearance hole (12), and the inner side wall of the annular groove (4) is fitted with a sealing ring (13).

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