Pneumatic booster based on wet-type concrete wet spraying machine

Abstract

The utility model discloses a pneumatic booster based on a wet-type concrete wet spraying machine, which comprises a material pipe, one end of the material pipe is connected with a spiral discharging end of the wet-type concrete wet spraying machine, the other end of the material pipe is provided with a material spraying nozzle in a matching way, and the material spraying nozzle comprises a conical material nozzle, a connecting pipe fitting, a material diffusing plate, a mounting plate and a connecting flange, the mounting plate and the conical material nozzle are fixed through a connecting flange, center pipe holes matched with a material pipe are formed in the center of the mounting plate and the center of the diffusion material plate, connecting holes matched with a connecting pipe fitting are formed in the periphery of the mounting plate and the periphery of the diffusion material plate, and the connecting pipe fitting is connected with an air pipe used for boosting wet materials. The jet nozzle and the air pipe are additionally arranged, and wet materials are boosted by high-pressure airflow and airflow distribution in the jet nozzle, so that the wet materials are uniformly and quickly pushed out of the nozzle, the adhesion of the wet materials is avoided, the product quality is improved, the material flowing is optimized, the working efficiency is improved, and the jet distance is greatly expanded; and a good boosting effect is realized.

Description

Technical Field

[0001] This utility model relates to the technical field of wet concrete spraying machines, and specifically to a pneumatic booster based on a wet concrete spraying machine. Background Technology

[0002] A wet concrete spraying machine is a mechanical device that uses compressed air to suspend concrete in a specific mix ratio and spray it onto the surface to form a dense concrete layer for support purposes. Depending on the method of adding water to the concrete mix, it can be divided into three types: dry, wet, and semi-wet. In a wet concrete spraying machine, the mixed concrete is delivered to the nozzle through a conveying hose, and compressed air is used to supply energy, causing the concrete to form a jet and be sprayed onto the surrounding rock surface. It is widely used in engineering construction, mining, tunnels, culverts, subways, hydropower projects, underground engineering, rock and soil slope reinforcement, and coal mine roadway shotcrete construction. It is suitable for conveying and spraying ordinary mortar, premixed dry mortar, and special mortars.

[0003] Existing wet concrete spraying machines suffer from problems such as the concrete material easily solidifying and clogging in the pipeline, and slow flow rate. Therefore, in actual operation, the spiral extrusion spraying process has issues such as short spraying distance, small spraying capacity, and uneven spraying. To address these problems, we provide a pneumatic booster based on the wet concrete spraying machine. Utility Model Content

[0004] To address the problems existing in the prior art, this utility model provides a pneumatic booster based on a wet concrete spraying machine, which avoids the sticking and clogging of wet concrete materials during spraying, improves the uniformity of wet concrete spraying, and significantly increases the spraying distance and output, thereby improving work quality and applicability.

[0005] To achieve the above objectives, this utility model employs a pneumatic booster based on a wet concrete spraying machine, comprising a material pipe. One end of the material pipe is connected to the discharge end of the wet concrete spraying machine, and the other end is fitted with a spray nozzle. The spray nozzle includes a conical nozzle, a connecting pipe, a diffuser plate, a mounting plate, and a connecting flange. The mounting plate is fixed to the conical nozzle via the connecting flange. Both the mounting plate and the diffuser plate have a central pipe hole matching the material pipe at their center. The mounting plate has connecting holes around its periphery that mate with the connecting pipe. The connecting pipe is connected to an air duct for boosting the wet material. The diffuser plate is a circular plate with a first diffuser ring of holes arranged in a circle and a second diffuser ring of holes concentrically arranged on it.

[0006] Preferably, the end of the feed tube extending into the conical nozzle is provided with a feeding chamfer, the angle of which is the same as the inclination angle of the conical nozzle.

[0007] Preferably, the air compressor of the wet concrete spraying machine is equipped with an air receiver, and the air inlet end of the air duct is connected to the air receiver.

[0008] Preferably, both the first and second diffuser rings are circular rings formed by multiple holes, with the first diffuser ring located inside the second diffuser ring, and the diameter of the holes in the second diffuser ring being larger than the diameter of the holes in the first diffuser ring.

[0009] Preferably, the number of the first diffuser rings is 32, the diameter of the rings is 8 mm, and the number of the second diffuser rings is 28, the diameter of the rings is 12 mm.

[0010] Preferably, the connecting pipe fitting has a pin hole and a U-shaped pin, the connecting pipe fitting is fixed to the air duct by the U-shaped pin, and a sealing ring is provided inside the connecting pipe opening of the connecting pipe fitting.

[0011] Preferably, the diffuser plate and the conical nozzle, as well as the feed tube and the mounting plate, are welded together.

[0012] The pneumatic booster based on a wet concrete spraying machine of this utility model has the following beneficial effects:

[0013] 1. The pneumatic booster based on the wet concrete spraying machine of this utility model, in the wet concrete spraying machine, high-pressure gas is injected into the spray nozzle through the air duct to assist in pushing the wet concrete material. Compared with the existing wet concrete spraying machine, the spraying distance can be increased from 30-40 meters to 60-80 meters, which greatly improves the spraying distance of the wet material.

[0014] 2. The pneumatic booster based on the wet concrete spraying machine of this utility model has a number and diameter of the first and second diffuser rings on the diffuser plate. The smaller inner diameter and larger outer diameter of the first diffuser rings result in different wind speeds and air volumes at different positions. This causes the wet material in different layers of the conical nozzle to be subjected to different driving forces. The wet material in the inner ring is "cut" by the rapid fine airflow to avoid sticking, while the wet material in the outer ring is pushed forcefully towards the discharge port to prevent the wet material from accumulating at the bottom of the conical nozzle. The combination of the two diffuser airflows optimizes the material flow and enables the wet concrete material to be pushed out evenly and quickly, improving the spraying quality and spraying distance, thereby achieving a very good boosting effect.

[0015] 3. In the pneumatic booster based on the wet concrete spraying machine of this utility model, the air duct and the connecting pipe are connected by a U-shaped pin. The air duct can be quickly disassembled and installed by inserting and removing the U-shaped pin, which facilitates the disassembly and maintenance of the air duct.

[0016] Referring to the following description and accompanying drawings, specific embodiments of the present invention are disclosed in detail, indicating how the principles of the present invention can be adopted. It should be understood that the embodiments of the present invention are not limited in scope as a result, and the embodiments of the present invention include many changes, modifications and equivalents. Attached Figure Description

[0017] Figure 1 This is a cross-sectional structural diagram of the present invention;

[0018] Figure 2 This is a schematic diagram of the structure of the diffusion plate in this utility model;

[0019] Figure 3 This is a structural schematic diagram of the connecting pipe and U-shaped pin of this utility model.

[0020] In the diagram: 10, material pipe; 20, injection nozzle; 201, conical nozzle; 202, connecting fitting; 203, diffuser plate; 204, mounting plate; 205, connecting flange; 206, first diffuser ring; 207, second diffuser ring; 208, U-shaped pin; 209, sealing ring; 30, feeding chamfer; 40, air duct. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. However, it should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit its scope.

[0022] It should be noted that when an element is referred to as "set on" or "provided with" another element, it can be directly on the other element or there may be an intermediate element. When an element is referred to as "connected to" or "connected to" another element, it can be directly connected to the other element or there may be an intermediate element at the same time. "Fixed connection" means fixed connection. There are many ways of fixed connection, which are not within the scope of protection of this document. The terms "vertical", "horizontal", "left", "right" and similar expressions used in this document are only for illustrative purposes and do not represent the only implementation method.

[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terms used in the description herein are for the purpose of describing particular embodiments only and are not intended to limit the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0024] Reference Figure 1This utility model provides a technical solution: a pneumatic booster based on a wet concrete spraying machine, including a material pipe 10. One end of the material pipe 10 is connected to the discharge end of the wet concrete spraying machine, and the other end is fitted with a spray nozzle 20. The spray nozzle 20 includes a conical nozzle 201, a connecting pipe 202, a diffuser plate 203, a mounting plate 204, and a connecting flange 205. The diffuser plate 203 is welded to the conical nozzle 201, and the material pipe 10 is welded to the mounting plate 204, providing good fixation and good working stability of the wet concrete spraying machine. The mounting plate 204 is fixed to the conical nozzle 201 by the connecting flange 205. The center of each plate 203 is provided with a central pipe hole that matches the material pipe 10. The periphery of the mounting plate 204 is provided with connecting holes that match the connecting pipe 202. The connecting pipe 202 is connected to the air pipe 40 for boosting the wet material. The diffuser plate 203 is a circular plate with a first diffuser ring 206 distributed in a circle and a second diffuser ring 207 with the same center. The air compressor of the wet concrete spraying machine is equipped with an air chamber. The air inlet end of the air pipe 40 is connected to the air chamber. Air can be compressed by the air compressor. The air chamber is installed at the exhaust port of the air compressor and can stably deliver high-pressure gas into the air pipe 40 to ensure the dynamic stability of the air pipe 40.

[0025] Reference Figure 1 The end of the material pipe 10 extending into the conical nozzle 201 is provided with a feeding chamfer 30, the angle of which is the same as the inclination angle of the conical nozzle 201, which helps the wet concrete material to be pushed out smoothly and avoids blockage.

[0026] Reference Figure 2 Both the first diffuser ring 206 and the second diffuser ring 207 are circular rings formed by multiple holes. The first diffuser ring 206 is located inside the second diffuser ring 207. There are 32 first diffuser rings 206 with a hole diameter of 8 mm, and 28 second diffuser rings 207 with a hole diameter of 12 mm. The first diffuser ring 206 and the second diffuser ring 207 are located in different layers; the outer ring has a larger hole diameter, and the inner ring has a smaller hole diameter. High-pressure airflow passing through the smaller hole diameter has... It has turbulent flow characteristics, which can prevent wet material from sticking together and play a certain role in pushing the material. The high-pressure airflow has less resistance when passing through the large diameter, and the airflow in this layer is larger. After passing through the large hole, it can powerfully push the wet material in the inner and outer rings of the conical nozzle 201 out. The inner and outer rings have different flow velocities and different thrusts, which can prevent the wet material from clogging at the feed chamfer 30 and prevent excess material from accumulating in the conical nozzle 201. It optimizes the flow of concrete wet material in the spray nozzle 20, so that it can be pushed out better.

[0027] Reference Figure 3The connecting pipe fitting 202 is provided with a pin hole and a U-shaped pin 209. The connecting pipe fitting 202 is fixed to the air duct 40 by the U-shaped pin 209. The connection is stable and easy to disassemble. In addition, a sealing ring 208 is provided in the connecting pipe opening of the connecting pipe fitting 202 to ensure the airtightness of the connection.

[0028] The pneumatic booster based on a wet concrete spraying machine provided in this embodiment works on the following principle:

[0029] During operation, concrete raw materials and water are added to the wet concrete spraying machine, mixing to form a wet mix. This wet mix is ​​gradually pushed into the feed pipe 1 by the screw. The air compressor operates and sends high-pressure gas into the air duct 40 through the air receiver. After the wet concrete mix enters the conical feed nozzle 201 through the feed pipe 1, the airflow in the air duct 40 also enters the conical feed nozzle 201. The airflow is then split by the diffuser plate 203. The first diffuser ring 206 and the second diffuser ring 207 divide the high-pressure airflow into two layers. The airflow in the inner layer has turbulent characteristics; the airflow is fine and fast, which can "cut" the wet concrete mix while pushing it, avoiding mixing. The adhesion of concrete is reduced because the aperture of the second diffuser ring 207 is relatively large, resulting in less resistance. Therefore, more air passes through the second diffuser ring 207, meaning the outer ring has a large airflow and greater thrust. This allows the wet material to be pushed more forcefully and quickly towards the discharge port of the conical nozzle 201, preventing the wet concrete from accumulating inside the conical nozzle 201. This dual cooperation of the inner ring mainly preventing adhesion and the outer ring mainly pushing the material effectively improves the uniformity of wet material spraying and extends the spraying distance. In actual use, the spraying distance of the existing wet concrete spraying machine can be increased from 30-40 meters to 60-80 meters.

[0030] The duct 40 and the connecting fitting 202 are fastened together by the cooperation of the U-shaped pin 209. Pulling out the pin also makes it easy to disassemble the duct 40, which facilitates the inspection and replacement of the duct 40.

[0031] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions or improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A pneumatic booster based on a wet concrete spraying machine, characterized in that, The system includes a material pipe (10), one end of which is connected to the discharge end of a wet concrete spraying machine, and the other end is fitted with a spray nozzle (20). The spray nozzle (20) includes a conical nozzle (201), a connecting pipe (202), a diffuser plate (203), a mounting plate (204), and a connecting flange (205). The mounting plate (204) is fixed to the conical nozzle (201) via the connecting flange (205). Both the mounting plate (204) and the diffuser plate (203) have a central tube hole that matches the material pipe (10) at their center. The mounting plate (204) has connecting holes around its periphery that match the connecting pipe fitting (202). The connecting pipe fitting (202) is connected to an air duct (40) for propelling the wet material. The diffuser plate (203) is a circular plate with a first diffuser ring (206) and a second diffuser ring (207) with the same center on it.

2. The pneumatic booster based on a wet concrete spraying machine according to claim 1, characterized in that: The feed tube (10) has a feeding chamfer (30) at one end of the tube extending into the conical nozzle (201), the angle of which is the same as the tilt angle of the conical nozzle (201).

3. The pneumatic booster based on a wet concrete spraying machine according to claim 2, characterized in that: The air compressor of the wet concrete spraying machine is equipped with an air chamber, and the air inlet end of the air duct (40) is connected to the air chamber.

4. The pneumatic booster based on a wet concrete spraying machine according to claim 3, characterized in that: The first diffuser ring (206) and the second diffuser ring (207) are both circular rings formed by multiple holes. The first diffuser ring (206) is located inside the second diffuser ring (207), and the diameter of the holes in the second diffuser ring (207) is larger than the diameter of the holes in the first diffuser ring (206).

5. The pneumatic booster based on a wet concrete spraying machine according to claim 4, characterized in that: The number of the first diffuser rings (206) is 32, and the diameter of the holes is 8 mm. The number of the second diffuser rings (207) is 28, and the diameter of the holes is 12 mm.

6. The pneumatic booster based on a wet concrete spraying machine according to claim 5, characterized in that: The connecting pipe fitting (202) is provided with a pin hole and a U-shaped pin (209). The connecting pipe fitting (202) and the air duct (40) are fixed by the U-shaped pin (209), and a sealing ring (208) is provided in the connecting pipe opening of the connecting pipe fitting (202).

7. The pneumatic booster based on a wet concrete spraying machine according to claim 6, characterized in that: The diffuser plate (203) is welded to the conical nozzle (201), and the feed tube (10) is welded to the mounting plate (204).

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