Mining guniting support spray gun

Abstract

The utility model discloses a mining guniting support spray gun, which relates to the technical field of guniting, and adopts the technical scheme that the mining guniting support spray gun comprises a feeding pipe, an air inlet pipe and a fixing clamp for fixing the feeding pipe and the air inlet pipe, the feeding pipe is communicated with the air inlet pipe through a mixing component, and a guniting port is formed in one side of the mixing component; one end of the air inlet pipe is connected with the ball valve; one end of the feeding pipe is connected with a material pipe joint. The mixer has the advantages that materials and gas are fully mixed through the unique mixing assembly, the materials and the gas are efficiently mixed through the design of the material spraying holes and the gas outlet holes of the mixer, the adhesiveness and the coverage of sprayed materials are good, and the shotcrete supporting quality can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of shotcreting, in particular to a shotcreting support spray gun for mine use. Background Art

[0002] Tunnel spraying is to seal the coal wall with spraying materials. The spraying materials adhere to the surface of the coal wall and can condense into an airtight thin layer. The thin layer tightly combines on the surface of the coal seam to seal the cracks of the coal wall and the pores of the coal body itself, reducing the interaction between the coal body and the air in the tunnel and greatly slowing down the gas emission rate on the surface of the coal wall.

[0003] During the shotcreting operation, the spray gun is held by hand. Under the action of air pressure and material pressure, the mortar is sprayed onto the wall surface.

[0004] However, the traditional shotcreting support spray gun usually includes a feeding pipe and an air spraying pipe. When in use, there is a problem of poor mixing effect. In terms of the mixing of materials and gas, the mixing effect of the existing spray gun is not good, resulting in uneven spraying of materials and affecting the support effect. Content of the Utility Model

[0005] In view of the above technical problems, the utility model provides a shotcreting support spray gun for mine use.

[0006] The technical solution is as follows: it includes a feeding pipe, an air inlet pipe, and a fixing clip for fixing the feeding pipe and the air inlet pipe. The feeding pipe and the air inlet pipe are connected through a mixing component, and a shotcreting port is arranged on one side of the mixing component;

[0007] One end of the air inlet pipe is connected to a ball valve, and one end of the ball valve is connected to an air pipe joint;

[0008] One end of the feeding pipe is connected to a material pipe joint.

[0009] Preferably, the mixing component includes an air inlet nut detachably connected to the feeding pipe. A through feeding hole is arranged in the middle of the air inlet nut. The feeding hole is communicated with the feeding pipe. An annular air inlet groove is arranged on the side wall of the air inlet nut. A plurality of air guide holes are arranged in an array on the side wall of the air inlet groove facing away from the feeding pipe. The axis of the air guide hole is parallel to the axis of the feeding hole;

[0010] An air supply sleeve is fixedly arranged outside the air inlet nut. The air supply sleeve is located outside the air inlet groove. An air inlet hole penetrating through is arranged on the side wall of the air supply sleeve. An internal thread joint is fixedly arranged on the side wall of the air supply sleeve. The internal thread joint is coaxial with the air inlet hole. The air inlet pipe is detachably connected to the air inlet nut through the internal thread joint.

[0011] Preferably, one end of the intake nut away from the feed pipe is threadedly connected to a fixing nut, a mixer is arranged inside the fixing nut, a through spraying hole is arranged in the middle of the mixer, the spraying hole is coaxial with the feeding hole, a plurality of obliquely arranged air outlet holes are formed in the side wall of the mixer, and the air outlet holes are communicated with the spraying hole;

[0012] An air cavity is formed between the fixing nut and the mixer, and the air outlet holes communicate the air cavity with the spraying hole;

[0013] One end of the mixer away from the intake nut is threadedly connected to a slurry spraying pipe.

[0014] Preferably, a washer is arranged between the fixing nut and the mixer.

[0015] Preferably, a limiting platform is arranged at one end of the mixer, and the limiting platform abuts against one end of the intake nut.

[0016] Preferably, the fixing clip includes a fixing part fixedly arranged on the feed pipe and a movable part movably arranged on the fixing part. One end of the fixing part is fixed to the feed pipe, and a semi-circular bracket is arranged at the other end. The bracket corresponds to the intake pipe, and the movable part is connected to the fixing part by a bolt;

[0017] An arc-shaped clamping plate is fixedly arranged at one end of the movable part close to the bracket.

[0018] Preferably, knurling is arranged on the outer wall of the fixing nut.

[0019] The beneficial effects brought by the technical solution provided by the embodiment of the present utility model are as follows: Its unique mixing assembly enables the material and the gas to be fully mixed. The design of the spraying hole and the air outlet hole of the mixer enables the material and the gas to be efficiently mixed, and the sprayed material has good adhesiveness and covering property, which can improve the quality of shotcrete support. Description of the Drawings

[0020] Figure 1 It is a schematic diagram of the overall structure of the embodiment of the present utility model.

[0021] Figure 2 It is a schematic diagram of the mixing assembly of the embodiment of the present utility model.

[0022] Figure 3 It is a schematic diagram of the intake nut of the embodiment of the present utility model.

[0023] Figure 4 It is a top view of the intake nut of the embodiment of the present utility model.

[0024] Figure 5 It is a schematic diagram of the fixing nut and the mixer of the embodiment of the present utility model.

[0025] Figure 6 Schematic diagram of the mixer according to an embodiment of the present utility model.

[0026] Among them, the reference numerals are: 1, feed pipe; 2, intake pipe; 3, mixing assembly; 4, intake nut; 5, feeding hole; 6, intake groove; 7, air guide hole; 8, air supply sleeve; 9, internal thread joint; 10, fixing nut; 11, mixer; 12, spraying hole; 13, air outlet hole; 14, air cavity; 15, spraying pipe; 16, washer; 17, limiting platform; 18, fixing clip; 19, ball valve; 20, trachea joint; 21, material pipe joint. Specific embodiments

[0027] In order to make the objectives, technical solutions and advantages of the present utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. Of course, the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0028] It should be noted that, without conflict, the embodiments in the present utility model and the features in the embodiments can be combined with each other.

[0029] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise specified, the meaning of "a plurality" is two or more.

[0030] In the description of the present utility model, it should be noted that, unless otherwise clearly defined and limited, the terms "installation", "connection", "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood through specific situations.

[0031] Example 1

[0032] See Figures 1 to 6 , the utility model provides a mine shotcreting support spray gun, which includes a feed pipe 1 and an air inlet pipe 2, as well as a fixing clip 18 for fixing the feed pipe 1 and the air inlet pipe 2. The feed pipe 1 and the air inlet pipe 2 are connected through a mixing component 3, and a spray port is arranged on one side of the mixing component 3;

[0033] One end of the air inlet pipe 2 is connected to a ball valve 19, and one end of the ball valve 19 is connected to an air pipe joint 20; the ball valve 19 can control the on-off of the gas in the air inlet pipe 2, facilitating the operator to adjust the gas flow rate according to actual needs at any time; the air pipe joint 20 ensures the quick connection between the air inlet pipe 2 and the gas source;

[0034] One end of the feed pipe 1 is connected to a material pipe joint 21.

[0035] The material pipe joint 21 on the feed pipe 1 can ensure the connection between the feed pipe 1 and the feeding equipment (grouting machine), enabling the shotcreting material to smoothly enter the spray gun from the feed pipe 1 and realizing the quick connection between the feed pipe 1 and the grouting machine.

[0036] The mixing component 3 includes an air inlet nut 4 detachably connected to the feed pipe 1. One end of the air inlet nut 4 is provided with internal threads, and one end of the feed pipe 1 is provided with external threads. The air inlet nut 4 is threadedly connected to the feed pipe 1. A through feed hole 5 is arranged in the middle of the air inlet nut 4, and the feed hole 5 is communicated with the feed pipe 1. An annular air inlet groove 6 is arranged on the side wall of the air inlet nut 4. A plurality of air guide holes 7 are arrayed on the side wall of the air inlet groove 6 facing away from the feed pipe 1. The axis of the air guide hole 7 is parallel to the axis of the feed hole 5;

[0037] The air inlet groove 6 can evenly distribute the gas around the feed hole 5. Under the action of the mixer 11, full contact and mixing of the gas and the material are realized. During the shotcreting process, the evenly mixed material and gas can form a denser and more uniform shotcreting layer, improving the strength and stability of the support structure.

[0038] An air delivery sleeve 8 is fixedly arranged on the outside of the air inlet nut 4. The air delivery sleeve 8 is fixedly welded to the air inlet nut 4. The air delivery sleeve 8 is located outside the air inlet groove 6. A through air inlet hole is arranged on the side wall of the air delivery sleeve 8. An internal thread joint 9 is fixedly arranged on the side wall of the air delivery sleeve 8. The internal thread joint 9 is fixedly welded to the air delivery sleeve 8. The internal thread joint 9 is coaxial with the air inlet hole. The air inlet pipe 2 is detachably connected to the air inlet nut 4 through the internal thread joint 9.

[0039] One end of the intake nut 4 away from the feed pipe 1 is threadedly connected to the fixing nut 10. A mixer 11 is arranged inside the fixing nut 10. A through spraying hole 12 is arranged in the middle of the mixer 11. The spraying hole 12 is coaxial with the feeding hole 5. A plurality of obliquely arranged air outlet holes 13 are formed on the side wall of the mixer 11. The air outlet holes 13 communicate with the spraying hole 12. One end of the air outlet hole 13 away from the intake nut 4 is close to the axis of the mixer 11.

[0040] An air cavity 14 is formed between the fixing nut 10 and the mixer 11. The air outlet holes 13 communicate the air cavity 14 with the spraying hole 12. The air cavity 14 communicates with the air intake groove 6 through the air guiding hole 7.

[0041] The spraying hole 12 on the mixer 11 is coaxial with the feeding hole 5. And the obliquely arranged air outlet holes 13 on the side wall can enable the gas to enter the spraying hole 12 at a certain angle, so that the gas can be fully mixed with the material. This mixing method greatly improves the mixing efficiency, enables the material and the gas to reach a highly uniform mixing state before spraying, and the sprayed material has better adhesiveness and covering property, can better adhere to the roadway wall, and enhances the support effect.

[0042] One end of the mixer 11 away from the intake nut 4 is threadedly connected to the spraying pipe 15.

[0043] The material enters the feeding hole 5 of the intake nut 4 through the feed pipe 1. At the same time, the gas enters the air intake groove 6 through the air inlet pipe 2, the internal thread joint 9, and the air inlet hole of the air supply sleeve 8. The gas in the air intake groove 6 enters the air cavity 14 through the air guiding hole 7.

[0044] The material flows in the feeding hole 5. The gas in the air cavity 14 enters the spraying hole 12 through the obliquely arranged air outlet holes 13 on the side wall of the mixer 11. The special design of the air outlet holes 13 enables the gas and the material to be fully mixed in the spraying hole 12.

[0045] Then, the mixed material and gas pass through the spraying hole 12 in the middle of the mixer 11, and are sprayed out from the spraying port under the guidance of the spraying pipe 15, realizing the spraying support operation.

[0046] The number of the air guiding holes 7 corresponds to that of the air outlet holes 13, and both are 4 - 8, preferably 6.

[0047] A washer 16 is arranged between the fixing nut 10 and the mixer 11.

[0048] The washer 16 is a rubber washer 16 and plays an important role in this device. First, it has a sealing function. The washer 16 can fill the gap between the fixing nut 10 and the mixer 11, prevent gas leakage, and ensure the working efficiency and safety of the spray gun. Second, it has a shock absorption and buffering function. When the spray gun is working, there is vibration. The washer 16 can reduce the influence of the vibration on the mixer 11 and the fixing nut 10, extend the service life, and reduce the probability of failure.

[0049] One end of the mixer 11 is provided with a limiting platform 17, and the limiting platform 17 abuts against one end of the air inlet nut 4.

[0050] The limiting platform 17 can play a role in quickly positioning when installing the mixer 11. At the same time, it can also make the spraying holes 12 on the mixer 11 correspond to the feeding holes 5, preventing the slurry from entering the air cavity 14 through the gap between the mixer 11 and the air inlet nut 4, thus blocking the air outlet holes 13, which will further lead to uneven mixing of gas and materials and affect the performance of the sprayed materials and the support effect.

[0051] The fixing clip 18 includes a fixing part fixedly arranged on the feed pipe 1 and a movable part movably arranged on the fixing part. One end of the fixing part is fixed to the feed pipe 1, and the other end is provided with a semi-circular arc-shaped bracket corresponding to the air inlet pipe 2. The movable part is connected to the fixing part by bolts;

[0052] An arc-shaped clamping plate is fixedly arranged at one end of the movable part close to the bracket.

[0053] When it is necessary to fix the air inlet pipe 2 to the feed pipe 1, place the air inlet pipe 2 on the bracket to make it in a relatively stable position. When the bolt is tightened, the clamping plate will tightly clamp the air inlet pipe 2, and together with the bracket, firmly fix the air inlet pipe 2 on the feed pipe 1. This can prevent the air inlet pipe 2 from shaking, shifting or falling off during the use of the spray gun, ensuring the stable transportation of gas and materials.

[0054] In actual operation, this fixing clip 18 is convenient for installation and disassembly. When it is necessary to maintain, replace or clean the air inlet pipe 2 or the feed pipe 1, just loosen the bolt, and the air inlet pipe 2 can be taken out from the fixing clip 18. At the same time, the firm fixing of the fixing clip 18 also helps to reduce the vibration and noise generated by the instability of the air inlet pipe 2 and the feed pipe 1 during the operation of the spray gun, improving the working efficiency and service life of the spray gun.

[0055] The outer wall of the fixing nut 10 is provided with knurling.

[0056] The design of the knurling can increase the friction force on the outer wall of the fixing nut 10. When the operator needs to tighten or loosen the fixing nut 10, the knurling can provide better gripping force, making the operation more convenient and labor-saving. Even if there is dust or oil on the hand, the fixing nut 10 can be stably held for operation.

[0057] When the utility model is in use, the material enters the feeding hole 5 of the air inlet nut 4 through the feed pipe 1. At the same time, the gas enters the air inlet groove 6 through the air inlet pipe 2, the internal thread joint 9 and the air inlet holes of the air supply sleeve 8, and the gas in the air inlet groove 6 enters the air cavity 14 through the air guide hole 7;

[0058] The material flows in the feeding hole 5, and the gas in the air cavity 14 enters the spraying hole 12 through the air outlet hole 13 which is obliquely arranged on the side wall of the mixer 11; the special design of the air outlet hole 13 enables the gas and the material to be fully mixed in the spraying hole 12;

[0059] Then, the mixed material and gas pass through the spraying hole 12 in the middle of the mixer 11, and are ejected from the spraying port under the guidance of the spraying pipe 15 to realize the shotcrete support operation.

[0060] The above are only the preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A shotcreting support spray gun for mining, characterized in that, It includes a feed pipe (1) and an air inlet pipe (2), as well as a fixing clip (18) for fixing the feed pipe (1) and the air inlet pipe (2). The feed pipe (1) and the air inlet pipe (2) are communicated through a mixing component (3), and a slurry spraying port is arranged on one side of the mixing component (3). One end of the air inlet pipe (2) is connected to a ball valve (19), and one end of the ball valve (19) is connected to an air pipe joint (20). One end of the feed pipe (1) is connected to a material pipe joint (21).

2. The mine spraying support spray gun according to claim 1, wherein The mixing component (3) includes an air inlet nut (4) detachably connected to the feed pipe (1). A through feed hole (5) is arranged in the middle of the air inlet nut (4). The feed hole (5) is communicated with the feed pipe (1). An annular air inlet groove (6) is arranged on the side wall of the air inlet nut (4). A plurality of air guide holes (7) are arranged in an array on the side wall of the air inlet groove (6) facing away from the feed pipe (1). The axis of the air guide hole (7) is parallel to the axis of the feed hole (5). An air supply sleeve (8) is fixedly arranged outside the air inlet nut (4). The air supply sleeve (8) is located outside the air inlet groove (6). A through air inlet hole is arranged on the side wall of the air supply sleeve (8). An internal thread joint (9) is fixedly arranged on the side wall of the air supply sleeve (8). The internal thread joint (9) is coaxial with the air inlet hole. The air inlet pipe (2) is detachably connected to the air inlet nut (4) through the internal thread joint (9).

3. The mine spraying support spray gun according to claim 2, wherein A fixing nut (10) is threadedly connected to the end of the air inlet nut (4) away from the feed pipe (1). A mixer (11) is arranged inside the fixing nut (10). A through spraying hole (12) is arranged in the middle of the mixer (11). The spraying hole (12) is coaxial with the feed hole (5). A plurality of obliquely arranged air outlet holes (13) are arranged on the side wall of the mixer (11). The air outlet holes (13) are communicated with the spraying hole (12). An air cavity (14) is formed between the fixing nut (10) and the mixer (11). The air outlet holes (13) communicate the air cavity (14) with the spraying hole (12). A slurry spraying pipe (15) is threadedly connected to the end of the mixer (11) away from the air inlet nut (4).

4. The mine spraying support spray gun according to claim 3, characterized in that, A washer (16) is arranged between the fixing nut (10) and the mixer (11).

5. The mine spraying support spray gun according to claim 4, characterized in that, A limiting platform (17) is arranged at one end of the mixer (11). The limiting platform (17) abuts against one end of the air inlet nut (4).

6. The mine spraying support spray gun according to claim 1, characterized in that, The fixing clip (18) includes a fixing part fixedly arranged on the feed pipe (1) and a movable part movably arranged on the fixing part. One end of the fixing part is fixed to the feed pipe (1), and the other end is provided with a semi-circular bracket corresponding to the air inlet pipe (2). The movable part is connected to the fixing part by a bolt. An arc-shaped clamping plate is fixedly arranged at one end of the movable part close to the bracket.

7. The mine spraying support spray gun according to claim 3, characterized in that, Knurling is arranged on the outer wall of the fixing nut (10).

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