Gun head for refractory spraying construction

Abstract

The utility model discloses a gun head for refractory spraying construction. The gun head comprises a binding agent inlet pipe, a feeding pipe, a flow guide ring I, a gun body, a flow guide ring II and a spray head, one circle or more than two circles of flow guide holes I are formed in the flow guide ring I, and the number of each circle of flow guide holes I is independently one or more than two; a binding agent inlet pipe is connected with the flow guide hole I through a regulating valve I; one circle or more than two circles of flow guide holes II are formed in the flow guide ring II, and the number of each circle of flow guide holes II is independently one or more than two; and the binding agent inlet pipe is connected with the flow guide hole II through a regulating valve II. Bonding agents are sprayed into the gun head through the two flow guide rings, spraying paint in the gun head is fully mixed with the bonding agents, the adding amount of the bonding agents is stabilized, the bonding strength of the spraying paint is ensured, the service life of the spraying paint is prolonged, and on-site use and operation are convenient.

Description

Technical Field

[0001] This utility model relates to the field of refractory material spraying construction technology, specifically to a spray gun head for refractory material spraying construction. Background Technology

[0002] The information disclosed in this background section is intended only to enhance the understanding of the overall background of this utility model and is not necessarily to be construed as an admission or in any way implying that such information constitutes prior art known to those skilled in the art.

[0003] In recent years, the total output of refractory materials has tended to decrease, but the output of spray coatings in unshaped refractory materials has increased significantly, and this trend is expected to continue. The main reason is that spray coating has high construction efficiency and is easy to mechanize. It is very effective as a repair method to extend the life of furnaces. Moreover, spray coating is convenient, quick, and labor-saving, and can save energy and resources.

[0004] The main difference between spray coating and ordinary castable refractory is the construction method. During spray coating, the coating material needs to be added to the hopper of the spray gun in advance. Depending on the properties of the coating material, different special pumps (or compressed air) are used to deliver it to the nozzle through a hose. Depending on the state of the coating material and the construction requirements, different binders are added to the front end of the nozzle. The coating material and binder are mixed evenly in the spray gun, and the coating material is sprayed onto the working surface with the help of compressed air, where it adheres to the working surface.

[0005] The structure of the spray gun is crucial to the spraying effect of the coating material, especially the structure of the gun body and nozzle. It is essential to consider whether the binder can be fully and evenly mixed with the coating material.

[0006] However, current existing technologies, such as the patent specification with publication number CN202570535U, do not fully consider the issue of the uniformity of mixing between the binder and the spray coating. Utility Model Content

[0007] In view of the above-mentioned technical problems and the shortcomings of the field, this utility model provides a gun head for refractory spraying construction. Through two guide rings, high-pressure liquid binder can be selectively sprayed into different positions to ensure uniform mixing of the spray coating and binder, reduce dust during the spraying process, stabilize the amount of binder added, ensure the bonding strength of the spray coating, and improve the service life of the spray coating.

[0008] The specific technical solution is as follows:

[0009] A spray gun for refractory spraying includes a binder inlet pipe and a feed pipe, a guide ring I, a gun body, a guide ring II, and a nozzle connected in sequence.

[0010] The flow guide ring I is provided with one or more flow guide holes I, and the number of flow guide holes I in each ring is independently one or more; the binder inlet pipe is connected to the flow guide holes I through the regulating valve I;

[0011] The guide ring II has one or more guide holes II, and the number of guide holes II in each ring is one or more; the binder inlet pipe is connected to the guide holes II through the regulating valve II.

[0012] When using the above-mentioned spray gun for refractory coating, the regulating valve I and regulating valve II can be opened simultaneously, closed simultaneously, or one can be opened while the other is closed. The regulating valve I and regulating valve II can respectively adjust the amount of binder entering the guide hole I and guide hole II.

[0013] This document presents an exemplary operating process for the aforementioned spray gun head used for refractory coating, involving the introduction of the binder twice, at different positions before and after the gun head: The feed pipe contains a mixture of spray paint and compressed air. This binder is introduced to the front end of the gun head through the binder inlet pipe and regulating valve I via guide orifice I. Then, the binder is introduced to the rear end of the gun head through the binder inlet pipe and regulating valve II via guide orifice II. The mixture of spray paint and compressed air comes into contact with the binder added at the front end within guide ring I, undergoing initial mixing. Further mixing occurs as the mixture passes through the gun body. Then, it is mixed again with the binder added at the rear end within guide ring II. Finally, the mixture is sprayed out through the nozzle, allowing the spray paint to adhere to the working surface. During this process, either or both of regulating valves I and II can be closed as needed, allowing the binder to be introduced only once at the corresponding front or rear position, or even preventing the introduction of binder directly into the gun head.

[0014] In some embodiments, the spray gun head for refractory spraying has two or more guide holes I on the guide ring I, with the guide holes I of adjacent rings being staggered, which is beneficial for the uniform mixing of the spray coating material and the binder added at the front end.

[0015] In some embodiments, the nozzle for refractory spraying has the outlet of the guide hole I facing the nozzle, and the angle between the guide hole I and the axis of the guide ring I is 30°-45°. This can prevent the sprayed material from clogging the guide hole I, and also facilitates the uniform mixing of the sprayed material with the binder added at the front end.

[0016] In some embodiments, the spray gun for refractory spraying has a guide tube between the guide ring I and the gun body; one or more guide grooves are formed on the inner surface of the guide tube, and the guide grooves are spiral-shaped. Through the guide tube with the above structure, the spray coating material and the binder added at the front end can rotate forward, and be further thoroughly and evenly mixed.

[0017] In some embodiments, the feed pipe of the spray gun for refractory spraying is connected to a first sealing gasket and a guide ring I to ensure a sealing effect.

[0018] In some embodiments, the spray gun head for refractory spraying has a guide ring I connected to a guide tube via a second sealing gasket to ensure a sealing effect.

[0019] In some embodiments, the spray gun head for refractory spraying has a flow guide ring I disposed within the connector I.

[0020] In some embodiments, the spray gun head, guide ring I, and guide tube for refractory spraying are disposed within connector I.

[0021] In some embodiments, the gun head and gun body of the refractory spraying application are connected by a third sealing gasket and a guide ring II to ensure a sealing effect.

[0022] In some embodiments, the nozzle for refractory spraying has a flow guide ring II connected to the nozzle via a fourth sealing gasket to ensure a sealing effect.

[0023] In some embodiments, the spray gun head for refractory spraying has a guide ring II disposed within connector II.

[0024] In some embodiments, the spray gun head for refractory spraying has two or more rings of guide holes II on the guide ring II, with adjacent rings of guide holes II being staggered, which is beneficial for the uniform mixing of the sprayed material and the binder added at the rear end.

[0025] Considering that the position of the guide ring II is close to the nozzle outlet, the time available for mixing the binder is short. In some embodiments, the nozzle used for refractory spraying has the outlet of the guide hole II facing the nozzle, and the angle between the guide hole II and the axis of the guide ring II is 80°-85°. This can prevent the sprayed material from clogging the guide hole II, and also facilitates the rapid and uniform mixing of the sprayed material and the binder added at the rear end in a short time.

[0026] In some embodiments, the gun head for refractory spraying is equipped with a main valve on the binder inlet pipe; the main valve is connected to the guide hole I through regulating valve I and to the guide hole II through regulating valve II, which facilitates overall control.

[0027] In some embodiments, the gun head for refractory spraying has a flexible hose as the gun body, which facilitates further and more thorough mixing of the spray coating material with the binder added at the front end; at the same time, the hose is lightweight, making it easy to handle, remove, and disassemble; the hose is flexible, allowing for direction adjustment during construction, and is easy to clean after use (it can be bent and disassembled during cleaning to facilitate the removal of clumps inside the hose).

[0028] In some embodiments, the spray nozzle for refractory spraying has a conical structure.

[0029] Compared with the prior art, the advantages of this utility model are as follows:

[0030] This utility model relates to a spray gun head for refractory coating. The binder is sprayed into the gun head through two guide rings, and the coating material and binder are fully mixed inside the gun head. The amount of binder added is stabilized, ensuring the bonding strength of the coating material and improving the service life of the coating material. It is convenient to use and operate on site. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the structure of a spray gun head used for refractory spraying in a specific embodiment;

[0032] Figure 2 for Figure 1 The diagram shows the structure of the guide ring I in the gun head used for refractory spraying.

[0033] Figure 3 for Figure 1 The diagram shows the structure of the guide tube in the nozzle used for refractory spraying.

[0034] Figure 4 for Figure 1 The diagram shows the structure of the guide ring II in the spray gun head used for refractory spraying. Detailed Implementation

[0035] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of the present invention.

[0036] See Figure 1 A spray gun for refractory coating includes a binder inlet pipe 10 and a feed pipe 1, connector I2, gun body 6, connector II7, and nozzle 9 connected in sequence. The feed pipe 1 has an inner diameter of 38 mm or 52 mm. The feed pipe 1 contains a mixture of spray paint and compressed air, with the compressed air pressure in the feed pipe 1 being 0.8-2.0 MPa, or more specifically 0.8-1.2 MPa. The gun body 6 is a flexible hose, with a length of 800-1500 mm and an inner diameter of 38 mm or 52 mm. The nozzle 9 has a tapered structure, a length of 200-500 mm (e.g., 300 mm), an inner diameter of 38 mm or 52 mm at the connection end with connector II7, a maximum inner diameter of 40 mm at the middle section of the nozzle 9, and an inner diameter of 20-100 mm (e.g., 25 mm) at the spray paint outlet end.

[0037] Connector I2 contains a flow guide ring I4 and a flow guide tube 5. The feed tube 1, flow guide ring I4, flow guide tube 5, and gun body 6 are connected sequentially. A first sealing gasket 31 is placed between the feed tube 1 and the flow guide ring I4, and a second sealing gasket 32 ​​is placed between the flow guide ring I4 and the flow guide tube 5 to ensure a tight seal. See also... Figure 2 The guide ring I4 has two concentric rings of guide holes I41, each ring containing 4-8 holes (e.g., 6 holes), for a total of 8-16 (e.g., 12) guide holes I41 on the guide ring I4. The guide holes I41 in adjacent rings are evenly distributed and staggered. The outlet of the guide hole I41 faces the nozzle 9, and the angle between the guide hole I41 channel and the axis of the guide ring I4 is 30°-45°, allowing the high-pressure binder to be obliquely injected into the nozzle along the multi-layered annular distribution of the guide hole I41 channels on the guide ring I4. The diameter of the guide hole I41 is 1-3 mm. See also... Figure 3 Four guide grooves 51 are formed on the inner surface of the guide tube 5. The guide grooves 51 are spiral in shape. The mixture of the spray paint and the binder added at the front end flows towards the gun body 6 in a self-rotating manner through the guide tube 5, which is conducive to the uniform mixing of the spray paint and the binder. The guide grooves 51 have a depth of 2-5mm, for example 3mm, and a width of 5-10mm.

[0038] Connector II7 contains a flow guide ring II8. The gun body 6, flow guide ring II8, and nozzle 9 are connected sequentially. A third sealing gasket 33 is placed between the gun body 6 and the flow guide ring II8, and a fourth sealing gasket 34 is placed between the flow guide ring II8 and the nozzle 9 to ensure a tight seal. See also... Figure 4 The guide ring II8 has two concentric rings of guide holes II81, each ring containing 4-8 holes (e.g., 6 holes), for a total of 8-16 (e.g., 12) guide holes II81 on the guide ring II8. The guide holes II81 in adjacent rings are evenly distributed and staggered. The outlet of the guide hole II81 faces the nozzle 9, and the angle between the guide hole II81 channel and the axis of the guide ring II8 is 80°-85°, allowing the high-pressure binder to be obliquely injected into the nozzle along the multi-layered annular distribution of guide holes II81 on the guide ring II8. The diameter of the guide hole II81 is 1-3mm.

[0039] The binder inlet pipe 10 has an inner diameter of 15 mm and is equipped with a main valve 11. The main valve 11 is connected to the guide hole I41 through the regulating valve I12 and the binder pipe I14, and is connected to the guide hole II81 through the regulating valve II13 and the binder pipe II15. The pressure of the high-pressure binder in the binder inlet pipe 10 is 2.0-3.0 MPa.

[0040] This document presents an exemplary operating process for the aforementioned spray gun head used for refractory coating, involving the introduction of the binder twice, at different positions before and after the gun head: The feed pipe 1 contains a mixture of spray paint and compressed air. This binder is introduced to the front end of the gun head via the binder inlet pipe 10, main valve 11, regulating valve I12, and binder pipe 14 through the guide hole I41. The binder is then introduced to the rear end of the gun head via the binder inlet pipe 10, main valve 11, regulating valve II13, and binder pipe 15 through the guide hole II81. The mixture of spray paint and compressed air comes into contact with the binder added at the front end within the guide ring I4 for initial mixing, and is further mixed as it passes through the gun body 6. It is then mixed again with the binder added at the rear end within the guide ring II8, and finally sprayed out through the nozzle 9. The sprayed paint adheres to the working surface. During this process, any one or both of the regulating valves I12 and II13 can be closed as needed, allowing the binder to be introduced only once at the corresponding front or rear position, or even to be completely omitted from the gun head.

[0041] Furthermore, it should be understood that after reading the above description of this utility model, those skilled in the art can make various alterations or modifications to this utility model, and these equivalent forms also fall within the scope defined by the appended claims.

Claims

1. A spray gun for refractory coating application, characterized in that, It includes a binder inlet pipe (10) and a feed pipe (1), a guide ring I (4), a gun body (6), a guide ring II (8) and a nozzle (9) connected in sequence; The guide ring I (4) is provided with one or more guide holes I (41), and the number of guide holes I (41) in each ring is one or more independently; the binder inlet pipe (10) is connected to the guide holes I (41) through the regulating valve I (12); The guide ring II (8) has one or more guide holes II (81), and the number of each guide hole II (81) is one or more; the binder inlet pipe (10) is connected to the guide hole II (81) through the regulating valve II (13).

2. The spray gun head for refractory spraying according to claim 1, characterized in that, The flow guide ring I(4) is provided with two or more flow guide holes I(41), and the flow guide holes I(41) of adjacent rings are staggered.

3. The spray gun head for refractory spraying according to claim 1, characterized in that, The outlet of the guide hole I (41) faces the nozzle (9), and the angle between the guide hole I (41) and the axis of the guide ring I (4) is 30°-45°.

4. The spray gun head for refractory spraying according to claim 1, characterized in that, A flow guide tube (5) is provided between the flow guide ring I (4) and the gun body (6); One or more guide grooves (51) are opened on the inner surface of the guide tube (5), and the guide grooves (51) are spiral.

5. The spray gun head for refractory spraying according to claim 4, characterized in that, The feed pipe (1) is connected to the first sealing gasket (31) and the guide ring I (4); The flow guide ring I (4) is connected to the flow guide tube (5) through the second sealing gasket (32); The flow guide ring I (4) and the flow guide tube (5) are located inside the connector I (2).

6. The spray gun head for refractory spraying according to claim 1, characterized in that, The gun body (6) is connected to the third sealing gasket (33) and the flow guide ring II (8); The flow guide ring II (8) is connected to the nozzle (9) via the fourth sealing gasket (34); The flow guide ring II (8) is located inside the connector II (7).

7. The spray gun head for refractory spraying according to claim 1, characterized in that, The guide ring II (8) has two or more guide holes II (81), and the guide holes II (81) of adjacent rings are staggered.

8. The spray gun head for refractory spraying according to claim 1, characterized in that, The outlet of the guide hole II (81) faces the nozzle (9), and the angle between the guide hole II (81) and the axis of the guide ring II (8) is 80°-85°.

9. The spray gun head for refractory spraying according to claim 1, characterized in that, A main valve (11) is provided on the binder inlet pipe (10); The main valve (11) is connected to the guide hole I (41) through the regulating valve I (12) and to the guide hole II (81) through the regulating valve II (13).

10. The spray gun head for refractory spraying according to claim 1, characterized in that, The gun body (6) is a flexible hose, and the nozzle (9) has a conical structure.

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