Mechanism for realizing spiral stirring of spraying material and spraying device with mechanism

Abstract

The invention relates to the technical field of coal mine underground spraying, in particular to a mechanism for achieving spiral stirring of spraying materials and a spraying device with the mechanism. The mechanism comprises a spiral mixing pipe fitting, and two feeding pipe joints are symmetrically arranged on the two sides of the middle of the spiral mixing pipe fitting correspondingly; the two feeding pipe joints are connected with two corresponding external feeding devices respectively, one feeding device is used for supplying a first raw material, the other feeding device is used for conveying a second raw material, an air control valve is installed at the rear end of the spiral mixing pipe fitting, a connector is installed at the front end of the spiral mixing pipe fitting, and the air control valve is connected with the connector. And a long conveying pipe is mounted at the front end of the connector. The feeding pipe joints are symmetrically arranged, so that two raw materials enter the spiral mixing pipe fitting from the two sides at the same time, the raw materials can be preliminarily and symmetrically distributed in the mixing pipe fitting, more balanced initial conditions are provided for subsequent spiral mixing, and the uniformity of the mixing effect is enhanced.

Description

Technical Field

[0001] The present invention relates to the technical field of underground coal mine spraying, in particular to a mechanism for realizing spiral stirring of spraying materials and a spraying device having the mechanism. Background Art

[0002] In the support and repair projects of underground coal mine roadways, spraying technology is a key means to ensure the stability of roadways and prevent the deformation and collapse of surrounding rocks.

[0003] Currently, the commonly used spraying type A and B materials are mostly two-component polymer materials, such as polyurethane and epoxy resin materials, which form a high-strength protective layer through rapid curing reactions.

[0004] These materials need to be mixed and sprayed underground with the help of a spraying device, and the mixing uniformity of the spraying materials directly determines the quality, bonding strength, and service life of the sprayed protective layer, which plays a crucial role in the safe production of coal mines.

[0005] The spraying type A and B materials used in underground coal mines generally need to be sprayed in cooperation with a spraying device. The mixing uniformity of the spraying materials determines the spraying quality and effect. The existing spraying devices generally use compressed air alone for spraying.

[0006] However, there are the following problems in this spraying method during the spraying process: First, compressed air spraying causes uneven mixing ratios of materials A and B.

[0007] Second, the uneven mixing of the two materials results in low spraying quality and insufficient spraying strength on the sprayed surface after spraying, and there is also a large amount of waste of spraying materials.

[0008] Based on this, the present invention designs and manufactures a mechanism for realizing spiral stirring of spraying materials and a spraying device having the mechanism. Summary of the Invention

[0009] To solve one of the above technical problems, the technical solution adopted by the present invention is: a mechanism for realizing spiral stirring of spraying materials, including a spiral mixing pipe fitting. Two feed pipe joints are symmetrically arranged on both sides of the middle of the spiral mixing pipe fitting. The two feed pipe joints are respectively connected to two corresponding feeding devices outside. One of the feeding devices is used to supply the first raw material, and the other is used to transport the second raw material. A gas control valve is installed at the rear end of the spiral mixing pipe fitting, a connection head is installed at the front end of the spiral mixing pipe fitting, a conveying long pipe is installed at the front end of the connection head, and a sealing connection joint for cooperating with an external spraying nozzle is installed at the end of the conveying long pipe.

[0010] Based on any of the above technical solutions, a further optimization is that: under the action of high-pressure air flow, the spiral mixing pipe fitting realizes the spiral preliminary mixing of two raw materials entering its interior and then conveys them into the interior of the conveying long pipe.

[0011] Based on any of the above technical solutions, a further optimization is that: the spiral mixing pipe fitting includes a mixing pipe. On the outer side walls on both sides of the middle of the mixing pipe, feeding elbows are symmetrically welded. At the outer ends of the two feeding elbows, the feeding pipe connectors are respectively installed. The inner ends of the two feeding elbows are respectively communicated with the interior of the mixing pipe. A mixing cavity is arranged inside the mixing pipe, and a spiral blade is coaxially and cooperatively installed inside the mixing cavity.

[0012] Based on any of the above technical solutions, a further optimization is that: the inner wall of the mixing pipe is polished.

[0013] Based on any of the above technical solutions, a further optimization is that: an interference fit is adopted between the outer side wall of the spiral blade and the inner wall of the mixing cavity.

[0014] Based on any of the above technical solutions, a further optimization is that: when air flow is supplied to the end of the air control valve, and the first raw material and the second raw material are simultaneously supplied to the two feeding pipe connectors, the spiral blade is driven to move axially and rotate along the mixing cavity.

[0015] Based on any of the above technical solutions, a further optimization is that: the air flow supplied to the end of the air control valve enters in a spiral manner.

[0016] The present invention also provides a spraying device, and the spraying device includes a mechanism for realizing spiral stirring of spraying materials as described in claim 7.

[0017] Based on any of the above technical solutions, a further optimization is that: the air inlet end of the air control valve is connected to an external matching pulse pipeline through an external swirl joint.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. By symmetrically arranging the feeding pipe connectors, the present invention enables two raw materials to enter the spiral mixing pipe fitting from both sides simultaneously, which is beneficial for the raw materials to initially form a symmetric distribution inside the mixing pipe fitting, provides more balanced initial conditions for subsequent spiral mixing, and enhances the uniformity of the mixing effect; 2. The present invention utilizes high-pressure air flow to simultaneously realize the mixing and conveying of raw materials, without the need for an additional mechanical driving device to specifically complete the mixing process, simplifies the mechanism structure, and reduces the equipment cost and energy consumption; 3. In the present invention, the spiral blade is driven by the airflow to passively move axially and rotate along the mixing chamber. There is no need to set up a dedicated motor or other power driving devices. The airflow supplied by the air control valve is used as the power source, which simplifies the mechanism structure, reduces the equipment cost and energy consumption. Moreover, the passive movement of the spiral blade has a certain self-adaptive ability, which is beneficial to meeting the raw material mixing requirements under different working conditions. 4. In the present invention, the air inlet end of the air control valve is connected to the external matching pulse pipeline through an external swirl joint. The pulse pipeline can control the pulse frequency and intensity of the airflow. The swirl joint ensures that the airflow enters the mixing chamber in a spiral manner, making the control of the airflow more accurate and flexible, and improving the adaptability and adjustability of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. In all the drawings, similar elements or components are generally identified by similar reference numerals. In the drawings, the elements or components are not necessarily drawn to scale.

[0020] Figure 1 It is a three-dimensional structure schematic diagram of the first perspective of the present invention.

[0021] Figure 2 It is a top view structure schematic diagram of the present invention.

[0022] Figure 3 It is a partial sectional structure schematic diagram of the inside of the mixing chamber of the present invention.

[0023] Figure 4 It is a three-dimensional structure schematic diagram of the second perspective of the present invention.

[0024] Figure 5 It is a product disassembly structure schematic diagram of the present invention.

[0025] Figure 6 It is a product assembled state structure schematic diagram of the present invention.

[0026] Figure 7 It is a product structure display schematic diagram of the present invention.

[0027] In the figure, 1, feed pipe joint; 2, air control valve; 3, connecting head; 4, conveying long pipe; 5, sealed connecting joint; 6, mixing pipe; 7, feed elbow; 8, mixing chamber; 9, spiral blade. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0028] The embodiments of the technical solution of the present invention will be described in detail below with reference to the accompanying drawings. The following embodiments are only used to illustrate the technical solution of the present invention more clearly, so they are only examples and cannot be used to limit the protection scope of the present invention. The specific structure of the present invention is as Figures 1-7 shown in

[0029] Embodiment 1: A mechanism for realizing spiral stirring of spraying materials, including a spiral mixing pipe fitting. Two feed pipe joints 1 are symmetrically arranged on both sides of the middle part of the spiral mixing pipe fitting. The two feed pipe joints 1 are respectively connected to two corresponding feeding devices outside. One of the feeding devices is used to supply the first raw material, and the other is used to convey the second raw material. A gas control valve 2 is installed at the rear end of the spiral mixing pipe fitting, a connecting head 3 is installed at the front end of the spiral mixing pipe fitting, a conveying long pipe 4 is installed at the front end of the connecting head 3, and a sealing connection joint 5 for cooperating with an external spraying nozzle is installed at the end of the conveying long pipe 4.

[0030] The feed pipe joints 1 on both sides of the middle part of the spiral mixing pipe fitting are respectively connected to the feeding devices for supplying the first raw material and the second raw material. A gas control valve 2 is installed at the rear end of the spiral mixing pipe fitting, and the front end is successively connected to a connecting head 3, a conveying long pipe 4, and a sealing connection joint 5. The sealing connection joint 5 cooperates with an external spraying nozzle. The two raw materials are respectively input into the spiral mixing pipe fitting from the two side feed pipe joints 1 through the feeding devices. The gas control valve 2 controls the air flow. After being mixed in the spiral mixing pipe fitting, the raw materials are conveyed to the spraying nozzle through the conveying long pipe 4.

[0031] The separate input and mixed conveyance of the two raw materials are realized. The symmetric structure is convenient for connection and installation with external feeding devices. Through the connection of each component, a complete raw material mixing and conveyance path is formed, providing a basic structural guarantee for subsequent spraying. The feed pipe joint 1 is used to connect the external feeding device to realize the input of the two raw materials; the gas control valve 2 is used to control the air flow, which may play a driving or regulating role in the mixing and conveyance of the raw materials; the connecting head 3, the conveying long pipe 4, and the sealing connection joint 5 are used to convey the mixed raw materials to the spraying nozzle to complete the transmission process of the raw materials from mixing to spraying. By symmetrically arranging the feed pipe joints 1, the two raw materials enter the spiral mixing pipe fitting from both sides at the same time. Compared with the single feeding method, it may be more conducive to the initial formation of a symmetric distribution of the raw materials in the mixing pipe fitting, providing more balanced initial conditions for subsequent spiral mixing and enhancing the uniformity of the mixing effect.

[0032] Based on any of the above technical solutions, a further optimization is that the spiral mixing pipe fitting realizes spiral pre-mixing of the two raw materials entering its interior under the action of high-pressure air flow and then conveys them to the interior of the conveying long pipe 4.

[0033] Under the action of high-pressure air flow, the two raw materials entering the interior of the spiral mixing pipe fitting complete spiral primary mixing and are then conveyed into the interior of the conveying long pipe 4. The high-pressure air flow provides power for the mixing and conveying of the raw materials, causing the raw materials to perform spiral movement within the spiral mixing pipe fitting to achieve primary mixing and pushing the mixed raw materials towards the conveying long pipe 4. Utilizing high-pressure air flow to simultaneously achieve the mixing and conveying of raw materials eliminates the need for an additional mechanical driving device to specifically complete the mixing process, simplifies the mechanism structure, and reduces equipment costs and energy consumption; the spiral primary mixing method enables the raw materials to come into full contact within the mixing pipe fitting, improving the mixing efficiency and uniformity. The high-pressure air flow has the dual functions of hybrid power and conveying power, and the spiral mixing pipe fitting serves as the place for raw material mixing and primary conveying. The two cooperate to achieve the process of transferring the raw materials from mixing to the conveying long pipe 4.

[0034] Based on any of the above technical solutions, a further optimization is as follows: The spiral mixing pipe fitting includes a mixing pipe 6. On the outer side walls on both sides of the middle part of the mixing pipe 6, feeding elbow pipes 7 are symmetrically welded. At the outer ends of the two feeding elbow pipes 7, the feeding pipe connectors 1 are respectively installed. The inner ends of the two feeding elbow pipes 7 are respectively communicated with the interior of the mixing pipe 6. A mixing chamber 8 is arranged inside the mixing pipe 6, and a spiral blade 9 is coaxially and cooperatively installed inside the mixing chamber 8.

[0035] The spiral mixing pipe fitting includes a mixing pipe 6. Feeding elbow pipes 7 are symmetrically welded on the outer side walls on both sides of the middle part of the mixing pipe 6. The feeding pipe connectors 1 are installed at the outer ends of the feeding elbow pipes 7, and the inner ends are communicated with the interior of the mixing pipe 6. A mixing chamber 8 is arranged inside the mixing pipe 6, and a spiral blade 9 is coaxially and cooperatively installed inside the mixing chamber 8. The two raw materials enter the mixing chamber 8 through the feeding pipe connectors 1 and the feeding elbow pipes 7. Inside the mixing chamber 8, the spiral blade 9 rotates along with the air flow or other driving forces, driving the raw materials to perform spiral propulsion movement along the inner wall of the mixing chamber 8 to achieve the mixing of the raw materials.

[0036] The setting of the feeding elbow pipes 7 enables the raw materials to smoothly enter the mixing chamber 8 from both sides of the middle part of the mixing pipe 6. The symmetrical distribution is conducive to the initial uniform distribution of the raw materials inside the mixing chamber 8; the coaxial and cooperative installation of the spiral blade 9 enables it to rotate stably inside the mixing chamber 8, stirring and pushing the raw materials, enhancing the mixing effect; the combination of components such as the mixing pipe 6, the feeding elbow pipes 7, and the spiral blade 9 forms a mixing unit with a compact structure and relatively high mixing efficiency.

[0037] The mixing pipe 6 is the main space for raw material mixing. The feeding elbow pipes 7 are the channels for the raw materials to enter the mixing pipe 6. The feeding pipe connectors 1 are used to connect external feeding equipment. The spiral blade 9 is the key component for achieving raw material mixing and propulsion, stirring and pushing the raw materials through rotation.

[0038] On the basis of any of the above technical solutions, a further optimization is that the inner wall of the mixing pipe 6 is polished.

[0039] Polishing the inner wall of the mixing pipe 6 makes the inner wall surface smooth. When the raw materials flow and mix in the mixing pipe 6, the smooth inner wall reduces the frictional resistance between the raw materials and the inner wall of the pipe, and reduces the possibility of the raw materials staying and adhering to the inner wall of the pipe. Reducing the retention and adhesion of the raw materials on the inner wall of the mixing pipe 6 can prevent the raw materials from solidifying or deteriorating due to long-term retention, ensuring the performance of the raw materials and the mixing quality; it is convenient to clean the mixing pipe 6, reducing the cleaning difficulty and time, and improving the maintenance convenience and working efficiency of the equipment.

[0040] On the basis of any of the above technical solutions, a further optimization is that a transition fit is adopted between the outer side wall of the spiral blade 9 and the inner wall of the mixing chamber 8.

[0041] A transition fit is adopted between the outer side wall of the spiral blade 9 and the inner wall of the mixing chamber 8, that is, the outer diameter of the spiral blade 9 is slightly smaller than the inner diameter of the mixing chamber 8, and there is a certain gap between the two, but the gap is small. This not only ensures that the spiral blade 9 can rotate freely in the mixing chamber 8, but also forms a seal to a certain extent to prevent a large amount of raw materials from leaking from the gap between the blade and the inner wall during the mixing process. When the spiral blade 9 rotates, a shearing action is generated on the raw materials through the transition fit gap with the inner wall, and at the same time, the raw materials are pushed to move axially along the mixing chamber 8. The transition fit ensures the rotational flexibility and certain sealing performance of the spiral blade 9 in the mixing chamber 8, avoiding the influence of raw material leakage on the mixing effect and conveying efficiency; the shearing action can make the raw materials be more strongly stirred and dispersed during the mixing process, further improving the mixing uniformity; at the same time, the axial pushing action of the blade enables the raw materials to move smoothly towards the conveying long pipe 4. The main function of the transition fit setting is to balance the rotational flexibility and sealing performance of the spiral blade 9, enhance the mixing effect through the shearing action, and realize the axial pushing of the raw materials.

[0042] On the basis of any of the above technical solutions, a further optimization is that when air flow is supplied to the end of the air control valve 2, and the first raw material and the second raw material are simultaneously supplied through the two feed pipe connectors 1, the spiral blade 9 is driven to move axially and rotate along the mixing chamber 8.

[0043] When air flow is supplied to the end of the air control valve 2, and the first raw material and the second raw material are supplied through the two feed pipe joints 1 at the same time, the spiral blade 9 is driven to move axially and rotate along the axis of the mixing chamber 8 under the action of the air flow. After the air flow enters the mixing chamber 8, a driving force is generated to push the spiral blade 9 to move. The rotation and axial movement of the spiral blade 9 drive the raw materials to perform a spiral propulsion movement in the mixing chamber 8, realizing the mixing and conveying of the raw materials. There is no need to set up a dedicated motor or other power driving device to drive the spiral blade 9, but the air flow supplied by the air control valve 2 is used as the power source, which simplifies the mechanism structure, reduces the equipment cost and energy consumption; the passive movement of the spiral blade 9 can automatically adjust the rotation and movement speed according to the size of the air flow and the characteristics of the raw materials, and has a certain self-adaptive ability, which is beneficial to meeting the raw material mixing requirements under different working conditions. The air control valve 2 is not only used to control the on-off of the air flow, but also provides power for the spiral blade 9 by supplying air flow. The spiral blade 9 realizes the functions of stirring, shearing and pushing the raw materials under the drive of the air flow, and the air flow has a dual role of power source and mixing assistance in this process.

[0044] On the basis of any one of the above technical solutions, a further optimization is that the air flow supplied to the end of the air control valve 2 enters in a spiral manner.

[0045] The air flow supplied to the end of the air control valve 2 enters the mixing chamber 8 in a spiral manner. The air flow entering in a spiral manner forms a swirling flow in the mixing chamber 8 and has a rotational velocity component. When the raw materials enter the mixing chamber 8, under the action of the spiral air flow, they perform a spiral movement together with the air flow and interact with the spiral blade 9 at the same time. The spiral air flow makes the raw materials move not only axially but also circumferentially in the mixing chamber 8, increasing the complexity of the movement trajectory of the raw materials, strengthening the turbulent effect and mixing effect between the raw materials, and further improving the mixing uniformity; the pushing effect of the spiral air flow helps the raw materials move more smoothly in the direction of the conveying long pipe 4, improving the conveying efficiency.

[0046] The present invention also provides a spraying device, and the spraying device includes a mechanism for realizing spiral stirring of spraying materials as described in claim 7.

[0047] The spraying device takes the mechanism for realizing spiral stirring of spraying materials as a component, integrating the raw material mixing function of the spiral stirring mechanism and the spraying function of the spraying device. After the spiral stirring mechanism completes the mixing of the raw materials, the uniformly mixed raw materials are sprayed onto the surface of the workpiece through the conveying long pipe 4 and the spraying nozzle.

[0048] On the basis of any one of the above technical solutions, a further optimization is that the air inlet end of the air control valve 2 is connected to an external matching pulse pipeline through an external swirling joint.

[0049] The intake end of the air control valve 2 is connected to the externally provided pulse pipeline through an external swirl joint. The pulse pipeline supplies airflows such as compressed air. After passing through the swirl joint, the airflow forms a spiral airflow and then enters the mixing chamber 8 through the air control valve 2. The pulse pipeline can control the pulse frequency and intensity of the airflow, thereby adjusting the airflow characteristics entering the mixing chamber 8. The swirl joint ensures that the airflow enters the mixing chamber 8 in a spiral manner, guaranteeing the spiral mixing effect; the pulse pipeline can adjust the pulse parameters of the airflow according to the characteristics of the raw materials and the mixing requirements, realizing flexible control of the movement speed of the spiral blade 9 and the mixing intensity, and adapting to the mixing requirements of different types of raw materials; this connection method makes the control of the airflow more precise and flexible, improving the adaptability and adjustability of the equipment.

[0050] Embodiment 2: Compared with Embodiment 1, the difference lies in that it further includes the following technical features: The present invention also provides a method for spraying after mixing of Material A and Material B by using a spraying device. 1. Characteristics of raw materials: Material A (the first raw material): a liquid or powdered main substrate (one of resin, coating base material), with good fluidity.

[0051] Material B (the second raw material): a liquid curing agent, catalyst or additive (isocyanate), which reacts with Material A to form a coating.

[0052] The two raw materials need to be stored separately in independent feeding devices (such as tanks, pumps) to avoid pre-mixing and curing.

[0053] Equipment connection and debugging 2. Connect the outlet of the feeding device of Material A to the feeding pipe joint 1 on one side of the spiral mixing pipe fitting, and connect the outlet of the feeding device of Material B to the feeding pipe joint 1 on the other side.

[0054] Install the air control valve 2 at the rear end of the spiral mixing pipe fitting. Its intake end is connected to an external pulse pipeline (such as a compressed air source) through a swirl joint to ensure that the airflow enters the mixing chamber 8 in a spiral manner.

[0055] The front end is connected to the conveying long pipe 4 through the connector 3, and the end is butt-connected to the spraying nozzle through the sealing connection joint 5.

[0056] 3. Parameter debugging: Airflow pressure: Adjust the air pressure of the pulse pipeline according to the viscosity of the raw materials (the recommended initial value is 0.3 - 0.6 MPa) to ensure that the spiral blade 9 moves axially and rotates passively under the drive of the airflow.

[0057] Adjust the air flow pressure according to the viscosity of the raw materials, enabling the equipment to adapt to raw materials with different viscosities and improving the versatility of the equipment; control the feeding flow rate and proportion to ensure the accurate mixing proportion of the raw materials, avoid poor coating performance caused by proportion deviation, and ensure the stability of the spraying quality; pre-calibrate the accuracy of the flow pump, providing a basis for accurately controlling the feeding flow rate and improving the accuracy and reliability of parameter debugging.

[0058] Feeding flow rate: Control the synchronous input of Material A and Material B through the feeding equipment. The volume ratio or mass ratio shall meet the formula requirements, and the accuracy of the flow pump needs to be pre-calibrated.

[0059] 4. Mixing and spraying operation steps: 4.1. Pre-start: Turn on the air source of the pulse pipeline, adjust the air control valve 2 to the set air pressure to ensure that the spiral blade 9 starts to rotate in the mixing chamber 8.

[0060] Synchronously start the feeding equipment of Material A and Material B, so that the raw materials enter the mixing chamber 8 of the mixing pipeline 6 through the feeding elbow 7.

[0061] The pre-start step ensures that the spiral blade 9 rotates before the raw materials, avoiding the accumulation of raw materials at the bottom of the mixing chamber 8 and ensuring the smooth start of the mixing process; the staged spiral mixing process makes the raw materials gradually uniform from initial mixing to dynamic mixing, improving the mixing quality; controlling the mixing time through the length of the conveying long pipe 4 (such as 2 - 5 meters) does not require an additional time control device, with a simple structure and easy implementation; further atomization at the nozzle makes the spraying more uniform and improves the surface quality of the coating.

[0062] 4.2. Spiral mixing process: Initial mixing stage: After flowing out of the feeding elbow 7, Material A and Material B enter the mixing chamber 8 along with the high-pressure spiral air flow.

[0063] Dynamic mixing stage: The spiral blade 9 rotates and axially moves under the push of the air flow, driving the raw materials to do a spiral propulsion movement along the inner wall of the mixing chamber 8, realizing shear mixing through the transition fit gap between the blade and the inner wall. At the same time, the air flow provides a turbulent effect to strengthen the material blending.

[0064] Mixing time: Control the residence time of the materials in the pipeline through the length of the conveying long pipe 4 (such as 2 - 5 meters) to ensure the mixing uniformity.

[0065] The uniformly mixed materials reach the nozzle through the conveying long pipe 4 and are further atomized with external compressed air at the nozzle outlet, and are evenly sprayed on the surface of the workpiece.

[0066] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention; for those skilled in the art of this technology, any alternative improvements or transformations made to the embodiments of the present invention fall within the protection scope of the present invention.

[0067] Where the present invention is not described in detail, it is common knowledge to those skilled in the art of this technology.

Claims

1. A mechanism for realizing spiral stirring of spraying materials, characterized in that: It includes a spiral mixing pipe fitting. On both sides of the middle part of the spiral mixing pipe fitting, two feed pipe connectors are symmetrically arranged. The two feed pipe connectors are respectively connected to two corresponding feeding devices outside. One of the feeding devices is used to supply the first raw material, and the other is used to convey the second raw material. A gas control valve is installed at the rear end of the spiral mixing pipe fitting, a connector is installed at the front end of the spiral mixing pipe fitting, a conveying long pipe is installed at the front end of the connector, and a sealing connection joint for cooperating with an external spraying nozzle is installed at the end of the conveying long pipe.

2. The mechanism for realizing spiral stirring of spraying materials according to claim 1, characterized in that: Under the action of high-pressure air flow, the spiral mixing pipe fitting realizes the spiral primary mixing of the two raw materials entering its interior and then conveys them into the interior of the conveying long pipe.

3. The mechanism for realizing spiral stirring of spraying materials according to claim 2, wherein: The spiral mixing pipe fitting includes a mixing pipe. On the outer side walls on both sides of the middle part of the mixing pipe, feed elbows are symmetrically welded. The feed pipe connectors are respectively installed at the outer ends of the two feed elbows. The inner ends of the two feed elbows are respectively communicated with the interior of the mixing pipe. A mixing chamber is arranged in the interior of the mixing pipe, and a spiral blade is coaxially and cooperatively installed in the interior of the mixing chamber.

4. The mechanism for realizing spiral stirring of spraying materials according to claim 3, characterized in that: The inner wall of the mixing pipe is polished.

5. The mechanism for realizing spiral stirring of spraying materials according to claim 4, characterized in that, A transition fit is adopted between the outer side wall of the spiral blade and the inner wall of the mixing chamber.

6. The mechanism for realizing spiral stirring of spraying materials according to claim 5, characterized in that: When air flow is supplied to the end of the gas control valve, and the first raw material and the second raw material are simultaneously supplied to the two feed pipe connectors, the spiral blade moves axially along the mixing chamber and rotates passively.

7. The mechanism for realizing spiral stirring of spraying materials according to claim 6, characterized in that: The air flow supplied to the end of the gas control valve enters in a spiral manner.

8. A spraying device, characterized in that: The spraying device includes a mechanism for realizing spiral stirring of spraying materials as described in Claim 7.

9. The spraying device according to claim 8, wherein: The air inlet end of the gas control valve is connected to a supporting pulse pipeline outside through an external swirl joint.

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