Airless spraying equipment for coal mine cementing material

Abstract

The utility model discloses airless spraying equipment for coal mine cementing materials, which comprises a grinding and stirring barrel, a bidirectional pneumatic conveying pump, a mixing device and a spraying gun, and is characterized in that the two input ends of the bidirectional pneumatic conveying pump are connected with the output end of the grinding and stirring barrel through hoses; the input end of the mixing device is connected with the two output ends of the two-way pneumatic conveying pump through hoses; and the input end of the spray gun is connected with the output end of the mixing device through a hose. The spraying device can solve the problems that an existing spraying device for coal mine underground cementing materials is unstable in atomization and not easy to move.

Description

Technical Field

[0001] The present application relates to the technical field of spraying equipment, and in particular to an airless spraying equipment for coal mine cementitious materials. Background Art

[0002] Existing spraying equipment for cementitious materials in underground coal mines comes in two types: diaphragm type and screw type. The diaphragm type uses a diaphragm pump as the pumping power, and the gun head aerates and atomizes the spraying process. The screw type uses a screw pump as the pumping power, and also aerates and atomizes the spraying process. The diaphragm type has the advantages of small size and light weight, but its inherent pumping pressure is low and easily affected by the atomizing air pressure of the gun head and the state of the stirring material, resulting in unstable pumping and uneven discharge. The screw type has the advantage of stable pumping, but its large size and heavy weight make it difficult to move underground, and the uniformity of the discharge is also limited by the stirring state.

[0003] For the problems of unstable diaphragm pumping and uneven discharge, the existing solution is to control the air pressure at the atomization port to stabilize the pumping resistance, but the slurry state still affects the pumping flow, and unstable atomization will still occur; for the problem of the screw type being difficult to move, the existing solution is to add rubber wheels to the equipment so that it can be pushed, but the roadside in the coal mine is uneven, and the muddy road section is difficult to push, and the slurry state still affects the uniformity of the discharge. Utility Model Content

[0004] The main purpose of this application is to provide an airless spraying equipment for coal mine cementitious materials, aiming to solve the problem of unstable atomization and difficulty in moving of existing spraying equipment for cementitious materials in underground coal mines.

[0005] To achieve the above-mentioned purpose, the present application provides an airless spraying equipment for coal mine cementitious materials, comprising: a grinding and stirring barrel, a two-way pneumatic conveying pump, a mixing device and a spray gun, wherein the two input ends of the two-way pneumatic conveying pump are connected to the output end of the grinding and stirring barrel by a hose; the input end of the mixing device is connected to the two output ends of the two-way pneumatic conveying pump by a hose; the input end of the spray gun is connected to the output end of the mixing device by a hose.

[0006] Optionally, the grinding and mixing barrel includes: a storage bin, a mixing bin and a grinder, wherein the mixing bin is fixed on the storage bin; the input end of the grinder is connected to the mixing bin, and the output end is connected to the storage bin; wherein the output end of the storage bin is connected to the input end of the bidirectional pneumatic conveying pump through a hose.

[0007] Optionally, the grinder includes: an air motor, a shell, a connecting shaft and a grinding block, wherein the air motor is connected to one side of the storage bin; the shell is connected to one side of the output end of the air motor; the connecting shaft is fixed to the output end of the air motor and is located in the shell; and the grinding block is fixed on the connecting shaft.

[0008] Optionally, the bidirectional pneumatic conveying pump includes: a pump body, a first piston cylinder, a second piston cylinder, a first slurry suction valve, a first slurry discharge valve, a second slurry suction valve and a second slurry discharge valve, wherein the first piston cylinder is connected to one side of the pump body; the second piston cylinder is connected to the other side of the pump body, and the second piston cylinder is arranged opposite to the first piston cylinder; the first slurry suction valve is fixed to the input end of the first piston cylinder; the first slurry discharge valve is fixed to the output end of the first piston cylinder; the second slurry suction valve is fixed to the input end of the second piston cylinder; and the second slurry discharge valve is fixed to the output end of the second piston cylinder.

[0009] Optionally, the airless spraying equipment for coal mine cementitious materials further includes: two pressure measuring devices, wherein the two pressure measuring devices are respectively arranged at the output end of the first slurry discharge valve and the output end of the second slurry discharge valve.

[0010] Optionally, the hose between the input end of the bidirectional pneumatic delivery pump and the output end of the grinding and mixing barrel is a hydraulic hose; the hose between the input end of the mixing device and the output end of the bidirectional pneumatic delivery pump is a hydraulic hose; the hose between the input end of the spray gun and the output end of the mixing device is a hydraulic hose.

[0011] Optionally, the mixing device is a three-way valve.

[0012] Optionally, the mixing device is a pipeline structure with three branches, wherein two pipelines are inlet pipelines, one pipeline is an outlet pipeline, and the angle between the two inlet pipelines is 100° to 150°.

[0013] Optionally, the mixing device is a pipeline structure with three branches, wherein the angle between two adjacent pipelines is 120°.

[0014] Optionally, the output end of the pneumatic motor is connected to the connecting shaft via a coupling.

[0015] The embodiment of the present application proposes an airless spraying device for coal mine cementitious materials. First, the spraying material is loaded into a grinding and stirring barrel, water is added, and the spraying material is ground and stirred. After being ground and stirred in the grinding and stirring barrel, the spraying liquid is sent to a two-way pneumatic delivery pump through a hose. The two-way pneumatic delivery pump delivers the spraying liquid to a mixing device through a hose. The mixing device combines the two spraying liquids into one, thereby increasing the flow rate of the spraying liquid in the hose and maintaining a stable pressure, and finally spraying it out from the spray gun. During the entire spraying process, due to the presence of the two-way pneumatic delivery pump and the mixing device combining the spraying liquid from the two hoses into one hose, the stability of the atomization of the spraying device for cementitious materials in coal mines is ensured. At the same time, the grinding and stirring barrel, the two-way pneumatic delivery pump, the mixing device and the spray gun are all small in size and easy to move in the limited space underground in the coal mine. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic structural diagram of an airless spraying device for coal mine cementitious materials provided in an embodiment of the present application;

[0017] Figure 2 for Figure 1 Schematic diagram of the structure of the medium grinding and mixing barrel;

[0018] Figure 3 for Figure 2 Cross-sectional view of the grinding machine;

[0019] Figure 4 for Figure 1 Schematic diagram of the structure of the bidirectional pneumatic conveying pump.

[0020] Among them, 1. Grinding and mixing barrel; 101. Storage bin; 102. Mixing bin; 103. Grinder; 1031. Pneumatic motor; 1032. Shell; 1033. Connecting shaft; 1034. Grinding block; 2. Bidirectional pneumatic conveying pump; 201. Pump body; 202. First piston cylinder; 203. Second piston cylinder; 204. First slurry suction valve; 205. First slurry discharge valve; 206. Second slurry suction valve; 207. Second slurry discharge valve; 208. Pressure measuring device; 3. Mixing device; 4. Spray gun.

[0021] The realization of the objectives, functional features and advantages of this application will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

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

[0023] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0024] In this utility model, unless otherwise specified or limited, the terms "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can mean fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0025] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the meaning of "and / or" appearing throughout the text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme in which A and B are satisfied at the same time. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0026] See also Figure 1 The embodiment of the present application provides an airless spraying equipment for coal mine cementitious materials, which may include: a grinding and stirring barrel 1, a two-way pneumatic conveying pump 2, a mixing device 3 and a spray gun 4, wherein the two input ends of the two-way pneumatic conveying pump 2 are connected to the output end of the grinding and stirring barrel 1 through a hose; the input end of the mixing device 3 is connected to the two output ends of the two-way pneumatic conveying pump 2 through a hose; the input end of the spray gun 4 is connected to the output end of the mixing device 3 through a hose.

[0027] In this embodiment, the spray material is first loaded into a grinding and stirring barrel 1, and water is added for grinding and stirring. The spray liquid after grinding and stirring in the grinding and stirring barrel 1 is then fed into a two-way pneumatic delivery pump 2 through a hose. The two-way pneumatic delivery pump 2 delivers the spray liquid through a hose to a mixing device 3. The mixing device 3 combines the two spray liquids into one, thereby increasing the flow rate of the spray liquid in the hose and maintaining a stable pressure, and finally spraying it from the spray gun 4. During the entire spraying process, the presence of the two-way pneumatic delivery pump 2 and the mixing device 3 combining the spray liquid from the two hoses into one hose ensure the stability of the atomization of the cementitious material spraying equipment in the coal mine. At the same time, the grinding and stirring barrel 1, the two-way pneumatic delivery pump 2, the mixing device 3, and the spray gun 4 are all relatively small in size, making them easy to move within the limited space in the coal mine.

[0028] See also Figure 2 The grinding and mixing barrel 1 may include: a storage bin 101, a mixing bin 102 and a grinder 103, wherein the mixing bin 102 is fixed on the storage bin 101; the input end of the grinder 103 is connected to the mixing bin 102, and the output end is connected to the storage bin 101; wherein the output end of the storage bin 101 is connected to the input end of the bidirectional pneumatic conveying pump 2 through a hose.

[0029] Specifically, the spray material is placed in the mixing chamber 102 and water is added for stirring. After the stirring is uniform, the resulting spray liquid is injected into the grinder 103. Under the action of the grinder 103, some particles in the spray liquid are ground, so that no particles appear in the spray liquid. After being ground by the grinder 103, the spray liquid enters the storage chamber 101. The spray liquid in the storage chamber 101 flows along the hose into the two-way pneumatic delivery pump 2 for spraying.

[0030] Through the above arrangement of the grinding and mixing barrel 1, the overall structure composed of the storage bin 101, the mixing bin 102 and the grinder 103 is small in size and easy to move.

[0031] See also Figure 3 The grinder 103 may include: an air motor 1031, a shell 1032, a connecting shaft 1033 and a grinding block 1034, wherein the air motor 1031 is connected to one side of the storage bin 101; the shell 1032 is connected to one side of the output end of the air motor 1031; the connecting shaft 1033 is fixed to the output end of the air motor 1031 and is located in the shell 1032; the grinding block 1034 is fixed on the connecting shaft 1033.

[0032] In this embodiment, the pneumatic motor 1031 serves as a power source to drive the connecting shaft 1033 to rotate. Since the connecting shaft 1033 is fixedly connected to the grinding block 1034, when the pneumatic motor 1031 drives the connecting shaft 1033 to rotate, the grinding block 1034 also starts to rotate, thereby achieving the grinding of the particles in the spray liquid, and ultimately eliminating the particles in the spray liquid.

[0033] The above configuration of the grinder 103 achieves the purpose of grinding particles in the spray liquid. The entire grinder 103 has a simple structure, mainly consisting of an air motor 1031, a housing 1032, a connecting shaft 1033, and a grinding block 1034. It is easy to manufacture while achieving the grinding effect on particles in the spray liquid.

[0034] See also Figure 4 The bidirectional pneumatic conveying pump 2 may include: a pump body 201, a first piston cylinder 202, a second piston cylinder 203, a first slurry suction valve 204, a first slurry discharge valve 205, a second slurry suction valve 206 and a second slurry discharge valve 207, wherein the first piston cylinder 202 is connected to one side of the pump body 201; the second piston cylinder 203 is connected to the other side of the pump body 201, and the second piston cylinder 203 is arranged opposite to the first piston cylinder 202; the first slurry suction valve 204 is fixed to the input end of the first piston cylinder 202; the first slurry discharge valve 205 is fixed to the output end of the first piston cylinder 202; the second slurry suction valve 206 is fixed to the input end of the second piston cylinder 203; and the second slurry discharge valve 207 is fixed to the output end of the second piston cylinder 203.

[0035] Among them, the pump body 201 transports the spray liquid that has been ground in the grinding and mixing barrel 1. The specific transportation process is as follows: the spray liquid that has been ground flows from a hose into a pipe connected to the two-way pneumatic delivery pump 2 under the action of the two-way pneumatic delivery pump 2. The pipe is divided into two groups, respectively arranged on both sides of the pump body 201. A first slurry suction valve 204 is provided at the inlet end of one of the pipes, and the outlet end is connected to the mixing device 3 through a hose, and the middle part is connected to the first piston cylinder 202; a second slurry suction valve 206 is provided at the inlet end of the other pipe, and the outlet end is connected to the mixing device 3 through a hose, and the middle part is connected to the second piston cylinder 203. Through the above setting of the two-way pneumatic delivery pump 2, the spray liquid is divided into two routes and sprayed out from the two-way pneumatic delivery pump 2. At the output end of the mixing device 3, the spray liquid is combined into one route and sprayed out by the spray gun 4, so that the flow rate of the spray liquid is increased and the pressure remains stable, thereby enhancing the stability of the spray.

[0036] See also Figure 4 The airless spraying equipment for coal mine cementitious materials further includes two pressure measuring devices 208 , wherein the two pressure measuring devices 208 are respectively arranged at the output end of the first slurry discharge valve 205 and the output end of the second slurry discharge valve 207 .

[0037] In this embodiment, the two pressure measuring devices 208 are provided to measure the pressure of the spray liquid in the pipeline in real time. The pressure in the pipeline can be adjusted based on the pressure measurement results of the pressure measuring devices 208 to prevent poor atomization of the spray liquid due to insufficient pressure in the pipeline. Conversely, excessive pressure in the pipeline may cause unexpected problems.

[0038] Furthermore, the hose between the input end of the bidirectional pneumatic delivery pump 2 and the output end of the grinding and mixing barrel 1 is a hydraulic hose; the hose between the input end of the mixing device 3 and the output end of the bidirectional pneumatic delivery pump 2 is a hydraulic hose; the hose between the input end of the spray gun 4 and the output end of the mixing device 3 is a hydraulic hose.

[0039] Among them, the hoses involved in this application are all set as hydraulic hoses. When using the airless spraying equipment for coal mine cementitious materials involved in this application, since the hydraulic hose has good pressure resistance, during the spraying operation, it can meet the high-pressure spraying liquid flow in the hydraulic hose without causing damage to the hydraulic hose.

[0040] Furthermore, the mixing device 3 is a three-way valve.

[0041] In this embodiment, the mixing device 3 is configured as a three-way valve, which can facilitate adjustment of the spraying liquid flowing through the mixing device 3 .

[0042] See also Figure 1 The mixing device 3 is a pipeline structure with three branches, wherein two pipelines are inlet pipelines, one pipeline is an outlet pipeline, and the angle between the two inlet pipelines is 100° to 150°.

[0043] In this embodiment, the angle between the two inlet pipes can be 100°, 110°, 120°, 130°, 140°, or 150°. The angle between the two inlet pipes is designed so as not to affect the flow of the spray liquid in the pipes.

[0044] See also Figure 1 The mixing device 3 is a pipeline structure with three branches, wherein the angle between two adjacent pipelines is 120°.

[0045] Specifically, it is found in practice that when the angle between the three branch pipe structures of the mixing device 3 is set to 120°, the flow effect of the spraying liquid in the three branch pipes is optimal.

[0046] Furthermore, the output end of the pneumatic motor 1031 is connected to the connecting shaft 1033 via a coupling.

[0047] The output end of the pneumatic motor 1031 is connected to the connecting shaft 1033 via a coupling, so that the transmission effect is good and the transmission is reliable.

[0048] The above are only preferred embodiments of the present application and do not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. An airless spraying device for coal mine cementitious materials, characterized in that: include: Grinding and mixing barrel (1); A bidirectional pneumatic delivery pump (2), wherein both input ends of the bidirectional pneumatic delivery pump (2) and the output end of the grinding and stirring barrel (1) are connected via hoses; A mixing device (3), wherein the input end of the mixing device (3) is connected to the two output ends of the bidirectional pneumatic delivery pump (2) via a hose; A spray gun (4), wherein the input end of the spray gun (4) is connected to the output end of the mixing device (3) via a hose.

2. The airless spraying equipment for coal mine cementitious materials according to claim 1, characterized in that: The grinding and stirring barrel (1) comprises: Storage silo (101); A mixing bin (102) is fixed on the storage bin (101); A grinder (103), the input end of which is connected to the mixing bin (102), and the output end of which is connected to the storage bin (101); The output end of the storage bin (101) and the input end of the bidirectional pneumatic delivery pump (2) are connected via a hose.

3. The airless spraying equipment for coal mine cementitious materials according to claim 2, characterized in that: The grinding machine (103) comprises: A pneumatic motor (1031) is connected to one side of the storage bin (101); A housing (1032) connected to one side of the output end of the pneumatic motor (1031); A connecting shaft (1033) is fixed to the output end of the pneumatic motor (1031) and is located in the housing (1032); The grinding block (1034) is fixed on the connecting shaft (1033).

4. The airless spraying equipment for coal mine cementitious materials according to claim 1, characterized in that: The bidirectional pneumatic delivery pump (2) comprises: Pump body (201); A first piston cylinder (202) connected to one side of the pump body (201); A second piston cylinder (203) is connected to the other side of the pump body (201), and the second piston cylinder (203) is arranged opposite to the first piston cylinder (202); A first slurry suction valve (204) is fixed to the input end of the first piston cylinder (202); A first slurry discharge valve (205) is fixed to the output end of the first piston cylinder (202); A second slurry suction valve (206) is fixed to the input end of the second piston cylinder (203); The second pulp discharge valve (207) is fixed to the output end of the second piston cylinder (203).

5. The airless spraying equipment for coal mine cementitious materials according to claim 4, characterized in that: The airless spraying equipment for coal mine gelling material also includes: Two pressure measuring devices (208) are respectively arranged at the output end of the first slurry discharge valve (205) and the output end of the second slurry discharge valve (207).

6. The airless spraying equipment for coal mine cementitious materials according to claim 1, characterized in that: The hose between the input end of the bidirectional pneumatic delivery pump (2) and the output end of the grinding and stirring barrel (1) is a hydraulic hose; The hose between the input end of the mixing device (3) and the output end of the bidirectional pneumatic delivery pump (2) is a hydraulic hose; The hose between the input end of the spray gun (4) and the output end of the mixing device (3) is a hydraulic hose.

7. The airless spraying equipment for coal mine cementitious materials according to claim 1, characterized in that: The mixing device (3) is a three-way valve.

8. The airless spraying equipment for coal mine cementitious materials according to claim 1, characterized in that: The mixing device (3) is a pipeline structure with three branches; Among them, two pipes are inlet pipes, one pipe is an outlet pipe, and the angle between the two inlet pipes is 100° to 150°.

9. The airless spraying equipment for coal mine cementitious materials according to claim 1, characterized in that: The mixing device (3) is a pipeline structure with three branches; The angle between two adjacent pipes is 120°.

10. The airless spraying equipment for coal mine cementitious materials according to claim 3, characterized in that: The output end of the pneumatic motor (1031) and the connecting shaft (1033) are connected via a coupling.

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