Valve plate for wet spraying machine

Abstract

The valve plate for the wet spraying machine comprises a first inner hole, a second inner hole and a mixing cavity, and the number of the first inner hole is one; the number of the second inner holes is three. The mixing cavity is arranged in the valve plate, is positioned at the communication part of the first inner hole and the second inner hole, and is used for providing a mixing space for an accelerator and compressed air and prolonging the mixing time of the compressed air and the accelerator, so that the mixing effect is improved; the mixing cavity comprises an upper cavity body and a lower cavity body, and the three second inner holes are communicated with the upper cavity body; one second inner hole is used for conveying an accelerator to the upper cavity, and the other two second inner holes are used for communicating the mixing cavity with the mixer; the lower cavity is connected to the lower end of the upper cavity in the axial direction. And one end, far away from the upper cavity, of the conveying pipe is communicated with the first inner hole so as to convey the compressed air in the first inner hole into the mixing cavity. The action positions of the compressed air and the accelerator and the mixing cavity are staggered, so that the compressed air and the accelerator have enough space for circulation, and the mixing uniformity of the compressed air and the accelerator is improved.

Description

Technical Field

[0001] This application relates to the field of wet spraying machine technology, specifically to a distribution plate for wet spraying machines. Background Technology

[0002] The distribution plate of the wet shotcrete machine is an important component of the spraying section. It is used to mix the accelerator and compressed air in the distribution plate and then transport the mixed medium to the mixer of the nozzle, where it is mixed with the concrete.

[0003] In the prior art, referring to the patent with publication number CN113580369A, the disclosed distribution plate includes an axially arranged first inner hole and a radially arranged second inner hole. The second inner hole is connected to the first inner hole. Compressed air and quick-setting agent enter the interior of the distribution plate through the second inner hole and mix at the junction of the second inner hole and the first inner hole. The resulting mixed medium is transported to the mixer through the first inner hole, and the mixed medium is mixed with the concrete in the mixer for secondary mixing.

[0004] However, in this distribution plate structure, since the accelerator and compressed air are mixed in the space formed by the first inner hole at the center of the distribution plate, the accelerator and compressed air will mix quickly and flow into the first inner hole after being sprayed out from the two second inner holes. However, due to the excessively fast mixing time, the mixing time of the compressed air and the accelerator is too short, resulting in uneven mixing of the compressed air and the accelerator. As a result, after the two are delivered to the mixer, they will also be insufficiently mixed with the concrete. Consequently, the concrete sprayed from the nozzle will have inconsistent head, and the concrete will be intermittent, sometimes misty and sometimes flocculent, leading to an increase in the concrete drop rate and rebound rate.

[0005] Therefore, the distribution plate of the wet spraying machine in the prior art has room for further improvement. Summary of the Invention

[0006] In view of this, and addressing the technical problem in the prior art where the mixing time between compressed air and accelerator in the distribution plate is too short, resulting in uneven mixing and affecting the concrete spraying effect, this application provides a distribution plate for a wet spraying machine, which includes a first inner hole, a second inner hole, and a mixing chamber. The mixing chamber is used to provide mixing space for the accelerator and compressed air to improve the mixing effect; and the second inner hole is arranged along the tangential direction of the mixing chamber, which can increase the contact time between the accelerator and the compressed air, thereby improving the mixing effect.

[0007] This application provides a distribution plate for a wet spraying machine, including: The first inner hole is set to one; The second inner hole has three holes; A mixing chamber, located within the distribution plate at the junction of the first inner hole and the second inner hole, is used to provide a mixing space for the accelerator and compressed air; the mixing chamber includes: The upper cavity has three second inner holes that communicate with it; one of the second inner holes is used to deliver the quick-setting agent to the upper cavity, and the other two second inner holes are used to communicate the mixing chamber with the mixer. The lower cavity is axially connected to the lower end of the upper cavity; its end away from the upper cavity is connected to the first inner hole to deliver compressed air from the first inner hole to the mixing chamber.

[0008] Compared with the prior art, the distribution plate of the wet spraying machine in this application is provided with a mixing chamber. The mixing chamber is located at the intersection of the first inner hole and the second inner hole. The first inner hole is used to deliver compressed air into the mixing chamber, and one of the second inner holes delivers the accelerator into the mixing chamber. The compressed air and the accelerator are mixed in the mixing chamber to form a mixing medium, which is then delivered to the mixer through the other two second inner holes to mix with the concrete. The mixing chamber provides additional mixing space for the accelerator and compressed air, which can increase the mixing time of the compressed air and the accelerator, thereby improving the mixing effect. In particular, in this application, the mixing chamber is composed of two chambers, an upper chamber and a lower chamber. The second inner hole is connected to the upper chamber, and the lower chamber is connected to the first inner hole. This allows the compressed air and the accelerator to act at different positions within the mixing chamber, providing sufficient space for the compressed air and the accelerator to circulate and increase the uniformity of their mixing.

[0009] Preferably, the first inner hole is arranged along the axial direction of the mixing chamber; the three second inner holes are distributed at intervals along the outer periphery of the mixing chamber, and the included angle between the axes of two adjacent second inner holes is 120°; The second inner hole is provided along the radial direction of the mixing chamber; In this embodiment, the first inner hole is used to transport compressed air. It is arranged axially so that the compressed air first rushes to the top of the upper cavity and then flows downward from the top of the upper cavity to the curved surfaces around it. The second inner hole is arranged radially so that when the accelerator enters the mixing chamber, it first acts on the side wall of the upper cavity and then flows towards the top of the upper cavity and the lower cavity respectively. Therefore, the combination of the mixing chamber and the first and second inner holes increases the flow space of the accelerator and compressed air in the mixing chamber, thereby making the two mix more evenly.

[0010] Preferably, the first inner hole is arranged along the axial direction of the mixing chamber; the three second inner holes are distributed at intervals along the outer periphery of the mixing chamber, and the included angle between the axes of two adjacent second inner holes is 120°; The second inner hole is arranged along the tangential direction of the mixing chamber.

[0011] In this embodiment, the first inner hole is arranged along the axial direction of the mixing chamber. When compressed air is injected into the mixing chamber from the first inner hole, the compressed air first acts on the top of the mixing chamber, and then flows downward along the curved surface of the mixing chamber. The second inner hole is arranged along the tangential direction of the outer contour of the mixing chamber, which enables tangential feeding of the mixing chamber. This allows the accelerator to rotate at high speed along the inner wall of the mixing chamber. On the one hand, this increases the flow path of the accelerator in the mixing chamber. On the other hand, under the action of centrifugal force, the accelerator is more evenly dispersed, thereby comprehensively improving the mixing effect of the accelerator and compressed air, so that the accelerator and compressed air can be mixed more evenly.

[0012] Preferably, the inner diameter of the mixing chamber is R1, the inner diameter of the first inner hole is R2, and the inner diameter of the second inner hole is R3, wherein R1>R2 and R1>R3. When the second inner hole is arranged along the radial direction of the mixing chamber, R1>2R2>2R3; When the second inner hole is set along the tangential direction of the mixing chamber, R1>3R2, R1>4R3.

[0013] In this embodiment, the large inner diameter of the mixing chamber provides ample space for the compressed air and accelerator to mix thoroughly, reducing the probability of pressure buildup and ensuring uniform mixing of the mixing medium and concrete. This, in turn, ensures the continuity and stability of the concrete spraying head from the wet spraying machine, thereby reducing the concrete drop rate and rebound rate. Furthermore, the second inner hole is spaced along the outer periphery of the mixing chamber, ensuring the uniform stress distribution on the distribution plate and guaranteeing its operational stability.

[0014] Preferably, the projections of the three second inner holes overlap on the central axis of the mixing chamber; In this embodiment, the three second inner holes are arranged on a plane at the same axial height, which can improve the structural stress uniformity of the distribution plate.

[0015] Preferably, among the three second inner holes, the axial distance between the second inner hole used for conveying the quick-setting agent and the first inner hole is L1, and the axial distance between the second inner hole used for communicating with the mixer and the first inner hole is L2, where L1>L2.

[0016] In this embodiment, the second inner hole for conveying the accelerator is positioned at a greater height in the axial direction than the other two second inner holes. This increases the path for the accelerator to flow into the other two second inner holes after mixing with compressed air, thereby allowing for a longer mixing time and a better mixing effect.

[0017] Preferably, the inner wall surface of the upper cavity is a smooth curved surface; along the axial direction of the mixing cavity, the inner diameter of the upper cavity gradually decreases in the direction away from the first inner hole; And / or, The inner wall of the lower cavity is a smooth curved surface; along the axial direction of the mixing cavity, the inner diameter of the lower cavity gradually decreases towards the first inner hole.

[0018] In this embodiment, the inner walls of both the upper and lower cavities are smooth curved surfaces, which can reduce the noise generated when compressed air and accelerator flow in the mixing cavity; both the upper and lower cavities are bowl-shaped structures, which can ensure a large space in the upper and lower cavities while ensuring that the upper and lower cavities have smooth curved surfaces, so as to reduce the resistance to the flow of accelerator and compressed air.

[0019] Preferred options also include: A connecting connector, which connects to the distribution plate, is located at the end of the second inner hole furthest from the mixing chamber; The connector is provided with a connection hole, which is coaxially connected to the second inner hole; The end face of the connector away from the second inner hole is perpendicular to the axis of the second inner hole.

[0020] In this embodiment, the connecting joint can increase the length of the second inner hole, while its outer end face is perpendicular to the axis of the second inner hole, which can facilitate the connection with the pipeline of the mixer and the quick-setting agent device and increase the stability of the connection.

[0021] Preferred options also include: An extension channel, located between the second inner bore and the mixing chamber, is used to extend the length of the second inner bore; The sidewall of the extended channel is parallel to the sidewall of the second inner hole and is on the same plane; The thickness of the sidewall of the extended channel and the outer sidewall of the adjacent distribution plate is T, which is set to 12mm-20mm.

[0022] In this embodiment, extending the channel can increase the space of the mixing chamber and extend the length of the second inner hole, thereby increasing the flow path of the accelerator and thus increasing the mixing effect of the accelerator and compressed air.

[0023] Preferably, the distribution plate has a split structure; it includes: The disk body has at least four mounting cavities; The first connector body, wherein the first inner hole is provided on the first connector body; The second connector body, the second inner hole is provided on the second connector body; The disc body is made of a different material than the first connector body and the second connector body; the disc body is made of a non-metallic material.

[0024] In this embodiment, a split structure is adopted, which divides the distribution plate into a connector body and a plate body. The connector body is located inside the plate body, so that the plate body and the connector body can be made of different materials. The plate body is made of non-metallic material, thereby reducing the overall weight of the distribution plate and reducing the wear and tear during equipment operation.

[0025] Preferably, the first connector body and the second connector body are made of metal material, including any one of stainless steel, high-quality carbon steel, and alloy steel; The first connector body and the second connector body are made of the same material or different materials; The first connector body is made of either high-quality carbon steel or alloy steel. The second connector body is made of any one of the following materials: 304 stainless steel, 316 stainless steel, and 316L stainless steel. And / or, The non-metallic material has a Shore hardness value of 60A-70A, and the non-metallic material is any one of polyurethane or rubber.

[0026] In this embodiment, the first and second connectors need to transport the medium and connect to various medium transport devices. Therefore, both are made of metal materials, which can provide a certain degree of corrosion resistance and high load-bearing capacity to ensure the stability of the connection between the distribution plate and other devices. The first connector is used to transport compressed air, which has weak corrosiveness, so it can be made of a different material than the second connector. The second connector is in contact with the accelerator and is preferably made of stainless steel. By using different materials for the first and second connectors, it is possible to ensure that both connectors meet the working requirements while saving costs to a certain extent.

[0027] Preferred options also include: The first mounting cavity is configured as one, arranged along the axis, and is used to mount the first connector body; The second mounting cavity is configured as three in a radial arrangement for mounting the second connector; The first mounting cavity and the second mounting cavity are connected at their ends near the center of the distribution plate; The first engaging rib is provided on the radial sidewall of the first mounting cavity and protrudes radially toward the central axis of the first mounting cavity; there are at least two ribs, and they are spaced apart along the axial direction of the first mounting cavity; The first engagement groove is provided on the radial outer side wall of the first connector body and is used to engage with the first engagement protrusion. The second engagement rib is provided on the radial sidewall of the second mounting cavity and protrudes radially toward the central axis of the second mounting cavity; there are at least two ribs, and they are distributed at intervals along the axial direction of the second mounting cavity; The first engagement groove is provided on the radial outer side wall of the second connector body and is used to engage with the second engagement protrusion. The third engagement protrusion is provided on the axial sidewall of the second mounting cavity and protrudes axially away from the disc body. The third engagement groove is located on the axial outer side wall of the second connector body and is used to engage with the third engagement protrusion.

[0028] In this embodiment, the engagement protrusion and engagement groove are provided between the connector body and the disc body to increase the connection between the connector body and the disc body. Attached Figure Description

[0029] Figure 1 This is a top view of the distribution plate provided in Embodiment 1 of this application; Figure 2 This is a side view of the distribution panel provided in Embodiment 1 of this application; Figure 3 This is a schematic cross-sectional view of the distribution plate provided in Embodiment 1 of this application. Figure 1 ; Figure 4 This is a schematic cross-sectional view of the distribution plate provided in Embodiment 1 of this application. Figure 2 ; Figure 5 This is a schematic cross-sectional view of the distribution plate provided in Embodiment 1 of this application. Figure 3 ; Figure 6 This is a side view of the distribution panel provided in Embodiment 2 of this application. Figure 1 ; Figure 7 This is a schematic cross-sectional view of the distribution plate provided in Embodiment 2 of this application. Figure 1 ; Figure 8 This is a schematic cross-sectional view of the distribution plate provided in Embodiment 2 of this application. Figure 2 ; Figure 9 This is a side view of the distribution panel provided in Embodiment 3 of this application. Figure 2 ; Figure 10 This is a schematic cross-sectional view of the distribution plate provided in Embodiment 3 of this application. Figure 3 ; Figure 11 This is a schematic cross-sectional view of the distribution plate provided in Embodiment 4 of this application. Figure 1 ; Figure 12 This is a schematic cross-sectional view of the distribution plate provided in Embodiment 4 of this application. Figure 2 ; Figure 13 This is a schematic cross-sectional view of the distribution plate provided in Embodiment 4 of this application. Figure 3 ; Figure 14 yes Figure 13 A magnified view of part A.

[0030] Attached label: 1. Distribution plate; 11. Mixing chamber; 12. First inner hole; 13. Second inner hole; 14. Extension channel; 15. Connecting joint; 16. Limiting ring groove; 17. Disc body; 18. First joint body; 19. Second joint body; 111. Upper cavity; 112. Lower cavity; 171. First mounting cavity; 172. Second mounting cavity; 173. First engaging protrusion; 174. Second engaging protrusion; 175. Third engaging protrusion. Detailed Implementation

[0031] To enable those skilled in the art to better understand the technical solutions of this disclosure, the following detailed, clear, and complete description of this disclosure is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of this disclosure and are not intended to limit it.

[0032] In the description of this application, the use of "first" and "second" is for the purpose of distinguishing technical features only, and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or the order of the technical features indicated.

[0033] Those skilled in the art should understand that in the disclosure of this application, the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as limitations on this application.

[0034] The present application will now be described in further detail with reference to the accompanying drawings, see below. Figures 1 to 14 illustrate.

[0035] Example 1 The distribution plate 1 (hereinafter referred to as distribution plate 1) for the wet spraying machine provided in this embodiment is applied in the wet spraying machine; for example Figures 1 to 5 As shown, the distribution plate 1 is used to mix the accelerator with compressed air to form a mixing medium, and to transport the mixing medium into the mixer to mix with the concrete, and then spray it out through the spraying mechanism of the wet spraying machine.

[0036] Specifically, such as Figures 1 to 5As shown, the distribution plate 1 has a regular hexagonal structure and a mixing chamber 11 inside. The centerline of the mixing chamber 11 is collinear with the centerline of the distribution plate 1. The distribution plate 1 also has a first inner hole 12 and a second inner hole 13. The first inner hole 12 is arranged along the axial direction of the mixing chamber 11, with its top communicating with the mixing chamber 11 and its bottom opening at the bottom of the distribution plate 1. The first inner hole 12 is used to deliver compressed gas into the mixing chamber 11. There are three second inner holes 13, which are arranged along the mixing chamber. The mixing chamber 11 is arranged radially, with three second inner holes 13 distributed circumferentially along the mixing chamber 11, and the included angle between two adjacent second inner holes 13 is 120 degrees; the inner end of the second inner hole 13 communicates with the mixing chamber 11, and the outer end of the second inner hole 13 opens on the outer side wall of the distribution plate 1; of the three second inner holes 13, one is used to transport the quick-setting agent into the mixing chamber 11 to mix with compressed air, and the other two second inner holes 13 are used to transport the mixture in the mixing chamber 11 to the mixer, so that the mixing medium is mixed with the concrete.

[0037] In this application, such as Figures 3 to 5 As shown, the inner diameter of the mixing chamber 11 is larger than the inner diameters of the first inner hole 12 and the second inner hole 13, thus making the space of the mixing chamber 11 larger. This provides a sufficiently large mixing space for compressed air and accelerator, allowing them to mix fully, reducing the probability of pressure buildup, and ensuring the uniformity of the mixing medium and concrete. This also ensures the continuity and stability of the concrete head sprayed by the wet spraying machine, thereby reducing the concrete drop rate and rebound rate.

[0038] In addition, the first inner hole 12 is used to transport compressed air, which is more effective than the first inner hole 12 in the prior art for transporting the mixing medium. In the prior art, the mixing medium is transported to the mixer through the first inner hole 12. The transport speed is too fast, which causes the compressed air and the quick-setting agent to enter the mixer too quickly before they are completely mixed, which will further reduce the mixing effect.

[0039] In this application, as Figure 2 As shown, the outlet of any one of the second inner holes 13 corresponds to the side wall between the other two second inner holes 13. When the accelerator is transported from the second inner hole 13 to the mixing chamber 11, it will first act on the inner wall of the mixing chamber 11 and will not flow directly into the other two second inner holes 13. This can increase the residence time of the accelerator in the mixing chamber 11, thereby improving the mixing effect.

[0040] Furthermore, the mixing chamber 11 is described in more detail; such as Figures 3 to 5As shown, the mixing chamber 11 includes an upper chamber 111 and a lower chamber 112. The upper chamber 111 has a spherical structure, and the lower chamber 112 has an annular structure. The inner walls of both the upper chamber 111 and the lower chamber 112 are smooth curved surfaces to reduce the obstruction of the flow of compressed air and accelerator, ensuring their smooth flow. The upper axial end of the lower chamber 112 is connected to the upper chamber 111, and the connection between the two is an arc transition to reduce stress concentration. The lower axial end of the lower chamber 112 is connected to the first inner hole 12. The upper chamber 111, the lower chamber 112, and the first inner hole 12 are coaxially arranged. When compressed air enters the mixing chamber 11 from the first inner hole 12, the compressed gas first rushes to the top of the upper chamber 111, and then flows downward from the top of the upper chamber 111 to the surrounding curved surfaces. During this flow process, the noise generated by the compressed air flow can be reduced. The three second inner holes 13 are connected to the upper cavity 111 and are arranged along the radial direction of the upper cavity 111. When the accelerator enters the mixing chamber 11 through the second inner holes 13, it first acts on the side wall of the upper cavity 111 and then flows toward the top of the upper cavity 111 and the lower cavity 112 respectively. Therefore, the combination of the mixing chamber 11 with the first inner hole 12 and the second inner hole 13 increases the flow space of the accelerator and compressed air in the mixing chamber 11, thereby making the two mix more evenly and reducing the noise during mixing and reducing the probability of pressure buildup.

[0041] The mixing chamber 11 has an inner diameter of R1, the first inner hole 12 has an inner diameter of R2, and the second inner hole 13 has an inner diameter of R3, where R1>R2, R1>R3; furthermore, R1>2R2>2R3; that is, the maximum radius of the mixing chamber 11 is greater than the diameters of the first inner hole 12 and the second inner hole 13, so that the mixing chamber 11 has sufficient space to prolong the mixing time of the accelerator and compressed air in the mixing chamber 11, so that the two are mixed more thoroughly.

[0042] In this embodiment, the maximum inner diameter of the mixing cavity 11 is the maximum inner diameter of the upper cavity 111, that is, the inner diameter of the upper cavity 111 is R1.

[0043] like Figures 4 to 5As shown, the lower cavity 112 includes a first end and a second end. The first end is located above the second end. The first end is connected to the upper cavity 111 and has an inner diameter of R4. The second end is connected to the first inner hole 12 and has an inner diameter of R5. Among them, R4 > R2 = R5, and R4 ≤ R1, that is, the maximum inner diameter of the lower cavity 112 is less than or equal to the inner diameter of the upper cavity 111, so that the maximum inner diameter of the mixing cavity 11 is the inner diameter of the upper cavity 111. And the inner diameter of the lower end of the lower cavity 112 is the same as the inner diameter of the first inner hole 12, so that the lower cavity 112 has a tendency to converge towards the first inner hole 12. That is, along the axial direction, the inner diameter of the lower cavity 112 gradually decreases in the direction away from the upper cavity 111. While ensuring that the internal space of the mixing cavity 11 is large enough, it can also ensure the structural characteristics of the first inner hole 12.

[0044] In this embodiment, when R4 = R1, the upper cavity 111 is a hemispherical structure; when R4 < R1, the upper cavity 111 is larger than a hemisphere of 1 / 2.

[0045] Furthermore, as Figures 3 to 4 shown, along the axial direction, the height of the upper cavity 111 is H1, and the height of the lower cavity 112 is H2, where H1 > 5H2, that is, the axial length of the upper cavity 111 is much larger than that of the lower cavity 112, so that the upper cavity 111 in the mixing cavity 11 accounts for a larger proportion, and then the spherical space in the mixing cavity 11 is larger, the flow area of the accelerator and the compressed air is larger, the mixing time is longer, and the mixing is more sufficient and more uniform.

[0046] As Figures 3 to 4 shown, in the axial direction of the upper cavity 111, the projections of the first inner hole 12 and the second inner hole 13 do not overlap, that is, the first inner hole 12 and the second inner hole 13 are arranged错开 axially to avoid direct interference between the compressed air and the accelerator and reduce the mixing effect. The projection of the second inner hole 13 does not overlap with the lower cavity 112, that is, the second inner hole 13 and the lower cavity 112 are错位 axially. The projection of the second inner hole 13 overlaps with a part of the projection of the upper cavity 111, that is, there is an axial distance between both ends of the second inner hole 13 and both ends of the mixing cavity 11, so that the accelerator can first act on the radial side wall of the upper cavity 111, so that the accelerator can flow upward towards the top of the upper cavity 111 or downward towards the lower cavity 112, so that the accelerator has a space for upward and downward flow, and can accelerate the mixing effect of the accelerator and the compressed air.

[0047] In an optional embodiment of the present application, as Figure 4 、As Figure 5As shown, a limiting annular groove 16 is provided at the end of the first inner hole 12 away from the mixing chamber 11. The limiting annular groove 16 is coaxially arranged with the first inner hole 12 and is recessed towards the mixing chamber 11. The inner diameter of the limiting annular groove 16 is larger than the inner diameter of the first inner hole 12. The limiting annular groove 16 provides installation space for the compressed air device to ensure the connection stability between the compressed air device and the distribution plate 1.

[0048] In an optional embodiment of this application, the distribution plate 1 further includes an extension channel 14, which is disposed between the second inner hole 13 and the mixing chamber 11. The extension channel 14 is used to extend the radial length of the second inner hole 13. Furthermore, the end face of the extension channel 14 near the mixing chamber 11 has an elliptical profile, which makes the length of the upper end of the second inner hole 13 greater than the length of the lower end, and increases the area at the connection between the second inner hole 13 and the mixing chamber 11, so that the accelerator has sufficient flow space and time, and reduces the probability of noise and pressure buildup during mixing, thereby improving mixing efficiency.

[0049] like Figures 3 to 5 As shown, the inner wall of the second inner hole 13 is provided with connecting threads so that the distribution plate 1 can be detachably connected to the mixer and the quick-setting agent device, ensuring the operational stability of the distribution plate 1.

[0050] In an optional embodiment of this application, the distribution plate 1 can be circular to reduce the manufacturing difficulty of the distribution plate 1.

[0051] When the distribution plate 1 is a regular hexagonal structure, the outer end of the second inner hole 13 is open in the plane, which can reduce the difficulty of opening the second inner hole 13, while ensuring the stability of the connection with the mixer and the accelerator device.

[0052] The distribution plate 1 is made of any one of the following materials: ordinary carbon steel, high-quality carbon steel, stainless steel, or alloy steel. The distribution plate 1 is made of carbon steel, which has good tensile strength and fatigue performance; stainless steel gives the distribution plate 1 good corrosion resistance; and alloy steel gives the distribution plate 1 good wear resistance and impact resistance.

[0053] Example 2 This embodiment is a further improvement on the first embodiment.

[0054] like Figures 6 to 8 As shown, in this embodiment, the first inner hole 12 is arranged along the axial direction of the mixing chamber 11, and the three second inner holes 13 are arranged along the tangential direction of the outer contour of the mixing chamber 11.

[0055] Specifically, the bottom of the first inner hole 12 opens at the bottom of the distribution plate 1. When compressed air is injected from the first inner hole 12 toward the mixing chamber 11, the compressed air first acts on the top of the mixing chamber 11, and then flows downwards and outwards along the curved surface of the mixing chamber 11, thereby increasing the flow path of the compressed air and improving the mixing effect. The length extension direction of the second inner hole 13 is parallel to its central axis, the outer wall of the second inner hole 13 is tangent to the maximum outer contour of the mixing chamber 11, and the central axis of the second inner hole 13 is parallel to the side wall of its adjacent and close distribution plate 1. This allows the accelerator to be tangentially fed into the mixing chamber 11 when it flows from the second inner hole 13 to the mixing chamber 11, and the accelerator can flow along the mixing... The high-speed rotation of the inner wall of cavity 11 increases the flow path of the accelerator within the mixing cavity 11. On the other hand, the centrifugal force makes the accelerator more evenly dispersed, thereby comprehensively improving the mixing effect of the accelerator and compressed air, so that the accelerator and compressed air can be mixed more evenly. In addition, the tangential setting of the second inner hole 13 can generate inertial conveying, requiring only a small amount of power to meet the power requirements of the accelerator, thereby reducing energy consumption. Furthermore, the tangential conveying path of the second inner hole 13 allows the mixed material to be discharged along the tangential direction, thereby forming a spiral propulsion flow, reducing the pressure loss and blockage risk caused by 90° turns or abrupt cross sections, thus ensuring the conveying stability of the distribution plate 1.

[0056] The mixing chamber 11 has an inner diameter of R1, the first inner hole 12 has an inner diameter of R2, and the second inner hole 13 has an inner diameter of R3, wherein R1>R2, R1>R3, and R1>3R2, R1>4R3.

[0057] In this embodiment, as Figure 8 As shown, the maximum inner diameter of the mixing chamber 11 is located at the connection between the upper cavity 111 and the lower cavity 112. Therefore, the maximum inner diameter of the mixing chamber 11 is R1, the inner diameter of the first inner hole 12 is R2, and the inner diameter of the second inner hole 13 is R3; where R1>3R2 and R1>4R3; that is, the maximum diameter of the mixing chamber 11 is much larger than the diameters of the first inner hole 12 and the second inner hole 13, so that the mixing chamber 11 has sufficient space to prolong the mixing time of the accelerator and compressed air in the mixing chamber 11, so that the two are mixed more thoroughly. In addition, the large volume of the mixing chamber 11 can theoretically apply a shotcrete capacity of 30m³ per hour. 3 The above wet spraying machine improves the applicability of the distribution plate 1.

[0058] Among them, such as Figure 8As shown, along the axial direction of the mixing chamber 11, the inner diameter of the upper cavity 111 gradually decreases in the direction away from the first inner hole 12; along the axial direction of the mixing chamber 11, the inner diameter of the lower cavity 112 gradually decreases in the direction closer to the first inner hole 12. This results in both the upper cavity 111 and the lower cavity 112 having a bowl-shaped structure, with the upper cavity 111 being an inverted bowl-shaped structure. This ensures a large space in both the upper and lower cavities 112 while maintaining smooth curved surfaces, thereby reducing the resistance to the flow of the accelerator and compressed air.

[0059] Furthermore, such as Figure 7 As shown, the outer wall of the extended channel 14 is parallel to the side wall of the second inner hole 13 and is on the same plane. Both are set along the tangential direction of the outer contour of the mixing chamber 11, thereby guiding the flow of the accelerator smoothly so that the accelerator can flow smoothly in the tangential direction and ensure the effect of tangential feeding.

[0060] It should be noted that, as Figure 7 As shown, the thickness between the sidewall of the extension channel 14 and the outer sidewall of the adjacent distribution plate 1 is T. T is set to 12mm-20mm, that is, the wall thickness at the location of the extension channel 14 needs to be within 12mm to 20mm, so that the second inner hole 13 has sufficient connection strength when connected with other pipe joints, and ensures the stability of the connection with other pipe joints.

[0061] In an optional embodiment of the application, the projections of the three second inner holes 13 overlap on the central axis of the mixing chamber 11, that is, the three second inner holes 13 are arranged on a plane with the same axial height, which can improve the structural stress uniformity of the distribution plate 1.

[0062] In another optional embodiment of the application, among the three second inner holes 13, the axial distance between the second inner hole 13 used for conveying the accelerator and the first inner hole 12 is L1, and the axial distance between the second inner hole 13 used for communicating with the mixer and the first inner hole 12 is L2, where L1>L2; that is, the axial height of the second inner hole 13 used for conveying the accelerator is greater than the axial height of the other two second inner holes 13, thereby increasing the path for the accelerator to flow into the other two second inner holes 13 after mixing with compressed air, thus making the mixing time of the accelerator and compressed air longer and the mixing effect better.

[0063] Example 3 This embodiment is a further improvement on embodiment two.

[0064] like Figures 9 to 10As shown, the distribution plate 1 also includes a connecting joint 15, which is fixedly connected to the outer wall of the distribution plate 1. The connecting joint 15 is located at the end of the second inner hole 13 away from the mixing chamber 11. The connecting joint 15 is provided with a connecting hole, which is coaxially connected to the second inner hole 13. The inner diameter of the connecting hole is the same as the inner diameter of the second inner hole 13, and the connecting hole is also provided with a connecting thread.

[0065] In this embodiment, the connecting connector 15 and the distribution plate 1 can be integrally formed to ensure the connection stability between the connecting connector 15 and the distribution plate 1.

[0066] The end face of the connecting joint 15 away from the second inner hole 13 is perpendicular to the axis of the second inner hole 13. This allows the connecting joint 15 to increase the length of the second inner hole 13 while its outer end face is perpendicular to the axis of the second inner hole 13. This facilitates connection with the pipes of the mixer and the quick-setting agent device, increases the connection length and uniformity between the pipe and the distribution plate 1, and ensures the stability of the connection between the pipe and the distribution plate 1, thus ensuring the working stability of the distribution plate 1.

[0067] Example 4 This embodiment is a further improvement on any of the above embodiments.

[0068] like Figures 11 to 14 As shown, the distribution plate 1 adopts a split structure. The distribution plate 1 includes a plate body 17 and a connector body. The plate body 17 is provided with a mounting cavity for installing the connector body. The connector body is set in the mounting cavity of the plate body 17 and is fixedly connected to the mounting cavity. This allows the plate body 17 and the connector body to be made of different materials. The plate body 17 is made of non-metallic material, thereby reducing the overall weight of the distribution plate 1, reducing the wear and tear during equipment operation, and reducing the manufacturing cost of the plate body 17.

[0069] Among them, such as Figures 11 to 14 As shown, the connector body is divided into a first connector body 18 and a second connector body 19. There is one first connector body 18 with a first inner hole 12. There are three second connector bodies 19 with second inner holes 13. The mounting cavities are four in total, divided into a first mounting cavity 171 and a second mounting cavity 172. The first mounting cavity 171 is one, arranged along the axis, for mounting the first connector body 18, which is coaxial with the first mounting cavity 171. There are three second mounting cavities 172, with the second connectors coaxial with each second mounting cavity 172, and the three second mounting cavities 172 are used to mount three second connectors.

[0070] In this embodiment, the non-metallic material used for the disc 17 has a Shore hardness of 60A to 70A, giving the disc 17 both elasticity and hardness, thereby improving its wear resistance and corrosion resistance, and thus extending its service life. The disc 17 can be made of either polyurethane or rubber to ensure the stability of the fit between the first connector 18, the second connector 19, and the disc 17.

[0071] The rubber material can be any one of ethylene propylene rubber, chlorosulfonated polypropylene rubber, acid acrylate rubber, polyurethane rubber, silicone rubber, fluororubber, polysulfide rubber, or chlorinated polyethylene rubber.

[0072] The distribution plate 1 of this application adopts a split structure and combines non-metallic and metallic materials to form a composite distribution plate 1. This improves the corrosion resistance of the composite distribution plate 1, extends its service life, and makes the overall weight of the distribution plate 1 lighter. In addition, since the plate body 17 is made of non-metallic material, it has a certain degree of elasticity, which further reduces noise when compressed air and accelerator come into contact with the plate body 17.

[0073] In this embodiment, since the first connector body 18 and the second connector body 19 need to transport the medium and connect with various medium transport devices, both the first connector body 18 and the second connector body 19 are made of metal materials, which can play a certain anti-corrosion role, and have high load-bearing capacity and strength, ensuring that the structural strength of the connecting threads on the first connector body 18 and the second connector body 19 is not easily worn, thereby ensuring the connection stability of the distribution plate 1 with other devices; and after being made of metal materials, the first connector body 18 and the second connector body 19 have a strong ability to withstand the pressure of compressed air and quick-setting agent, and will not easily fall off the first connector body 18 and the second connector body 19 due to excessive pressure.

[0074] The first connector body 18 and the second connector body 19 can be made of any one of high-quality carbon steel, alloy steel, or stainless steel.

[0075] In an optional embodiment of this application, the first connector body 18 and the second connector body 19 are made of the same metal material.

[0076] In another optional embodiment of this application, the first connector body 18 and the second connector body 19 are made of different metal materials; specifically, the first connector body 18 is used to transport compressed air, which is less corrosive, so the first connector body 18 can be made of a different material than the second connector body 19, so as to ensure that the two connector bodies meet the working requirements while saving costs to a certain extent.

[0077] The first connector body 18 is made of any one of high-quality carbon steel or alloy steel; the second connector body 19 is made of any one of 304 stainless steel, 316 stainless steel, or 316L stainless steel. Stainless steel has good corrosion resistance, oxidation resistance, strength, and toughness, and is easy to process into connection threads. Since the price of stainless steel is more than three times that of ordinary carbon structural steel, using carbon steel for the first connector body 18 can reduce costs.

[0078] Furthermore, the connection between the first connector body 18 and the disc body 17 is further extended; such as... Figures 11 to 14 As shown, the first mounting cavity 171 is provided with a first engaging protrusion 173, which is disposed on the radial side wall of the first mounting cavity 171 and protrudes radially toward the central axis of the first mounting cavity 171. The first engaging protrusion 173 has an annular structure. There are at least two first engaging protrusions 173, which are spaced apart along the axial direction of the first mounting cavity 171 to increase the limiting connection position with the first connector body 18. The radial outer side wall of the first connector body 18 is provided with a first engaging groove, the number and structure of which correspond to the first engaging protrusion 173. The first engaging groove is used to engage with the first engaging protrusion 173 to realize the axial connection limiting between the first connector body 18 and the disc body 17, thereby improving the connection stability between the first connector body 18 and the disc body 17 and making it difficult for the first connector body 18 to axially disengage from the first mounting cavity 171 of the disc body 17, thus ensuring the working stability of the distribution plate 1.

[0079] Based on the above embodiments, the connection between the second connector body 19 and the disc body 17 is further extended; for example... Figures 11 to 14 As shown, a second engaging protrusion 174 is provided on the radial sidewall of the second mounting cavity 172. The second engaging protrusion 174 protrudes radially toward the central axis of the second mounting cavity 172. The second engaging protrusion 174 has a ring structure, and there are at least two second engaging protrusions 174. The second engaging protrusions 174 are distributed at intervals along the axial direction of the second mounting cavity 172 to increase the limiting connection position with the first connector body 18. The radial outer sidewall of the second connector body 19 is provided with a second engaging groove. The number and structure of the second engaging grooves correspond to the second engaging protrusion 174. The second engaging groove is used to engage with the second engaging protrusion 174 to realize the axial connection limiting between the second connector body 19 and the disc body 17, thereby improving the connection stability between the second connector body 19 and the disc body 17 and making it difficult for the second connector body 19 to axially disengage from the second mounting cavity 172 of the disc body 17, thus ensuring the working stability of the distribution plate 1.

[0080] Furthermore, such as Figures 11 to 14As shown, a third engaging ridge 175 is provided on the axial sidewall of the second mounting cavity 172. The third engaging ridge 175 protrudes axially away from the center of the disc body 17. The third engaging ridge 175 has a ring structure, and there is at least one third engaging ridge 175. When the number of third engaging ridges 175 is greater than one, the third engaging ridges 175 are arranged on the same plane, and the inner diameter of each third engaging ridge 175 is different. There is a radial gap between two adjacent third engaging ridges 175. The minimum inner diameter of 75 is greater than the inner diameter of the second inner hole 13; correspondingly, a third meshing groove is provided on the axial outer side wall of the second connector body 19. The number and structure of the third meshing groove correspond to the third meshing protrusion 175. The third meshing groove is used to mesh with the third meshing protrusion 175 to realize the connection limit between the second connector body 19 and the second mounting cavity 172 of the disk body 17 in the radial direction, so that the second connector body 19 is not easily misaligned with the second mounting cavity 172 of the disk body 17 in the radial direction, thereby ensuring the working stability of the distribution disk 1.

[0081] In this application, the cross-sectional shapes of the first engaging protrusion 173, the second engaging protrusion 174, and the third engaging protrusion 175 include, but are not limited to, semi-circular, triangular, rectangular, and trapezoidal shapes.

[0082] It should be noted that the various embodiments of this application can be arbitrarily combined into new embodiments, provided that the solutions do not conflict and the technical solutions can coexist.

[0083] The present application has been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of the present application. The descriptions of the embodiments above are only for the purpose of helping to understand the present application and its core ideas. It should be noted that those skilled in the art can make several improvements and modifications to the present application without departing from the principles of the present application, and these improvements and modifications also fall within the protection scope of the claims of the present application.

Claims

1. A distribution plate for a wet spraying machine, characterized in that, include: One first inner hole (12) is provided; Three second inner holes (13) are provided; A mixing chamber (11), located within the distribution plate (1) at the junction of the first inner hole (12) and the second inner hole (13), is used to provide a mixing space for the accelerator and compressed air; the mixing chamber (11) includes: The upper cavity (111) has three second inner holes (13) connected to it; one of the second inner holes (13) is used to deliver the quick-setting agent to the upper cavity (111), and the other two second inner holes (13) are used to connect the mixing chamber (11) to the mixer; The lower cavity (112) is axially connected to the lower end of the upper cavity (111); its end away from the upper cavity (111) is connected to the first inner hole (12) for conveying compressed air in the first inner hole (12) to the mixing chamber (11).

2. The distribution plate for a wet spraying machine according to claim 1, characterized in that, The first inner hole (12) is arranged along the axial direction of the mixing cavity (11); the three second inner holes (13) are distributed at intervals along the outer periphery of the mixing cavity (11), and the included angle between the axes of two adjacent second inner holes (13) is 120°; The second inner hole (13) is arranged in the radial direction of the mixing chamber (11); or, The second inner hole (13) is arranged along the tangential direction of the mixing chamber (11).

3. The distribution plate for a wet spraying machine according to claim 2, characterized in that, The inner diameter of the mixing chamber (11) is R1, the inner diameter of the first inner hole (12) is R2, and the inner diameter of the second inner hole (13) is R3, wherein R1>R2, R1>R3; When the second inner hole (13) is arranged in the radial direction of the mixing chamber (11), R1>2R2>2R3; When the second inner hole (13) is set along the tangential direction of the mixing chamber (11), R1>3R2, R1>4R3.

4. The distribution plate for a wet spraying machine according to claim 1, characterized in that, On the central axis of the mixing chamber (11), the projections of the three second inner holes (13) overlap; or, Among the three second inner holes (13), the axial distance between the second inner hole (13) used for conveying the quick-setting agent and the first inner hole (12) is L1, and the axial distance between the second inner hole (13) used for communicating with the mixer and the first inner hole (12) is L2, where L1>L2.

5. The distribution plate for a wet spraying machine according to claim 1, characterized in that, The inner wall of the upper cavity (111) is a smooth curved surface; along the axial direction of the mixing cavity (11), the inner diameter of the upper cavity (111) gradually decreases in the direction away from the first inner hole (12); And / or, The inner wall of the lower cavity (112) is a smooth curved surface; along the axial direction of the mixing cavity (11), the inner diameter of the lower cavity (112) gradually decreases toward the first inner hole (12).

6. The distribution plate for a wet spraying machine according to claim 1, characterized in that, Also includes: A connecting connector (15) is connected to the distribution plate (1) and is located at the end of the second inner hole (13) away from the mixing chamber (11); The connecting joint (15) is provided with a connecting hole, which is coaxially connected with the second inner hole (13); The end face of the connector (15) away from the second inner hole (13) is perpendicular to the axis of the second inner hole (13).

7. The distribution plate for a wet spraying machine according to claim 1, characterized in that, Also includes: An extension channel (14) is located between the second inner hole (13) and the mixing chamber (11) to extend the length of the second inner hole (13); The sidewall of the extended channel (14) is parallel to the sidewall of the second inner hole (13) and is on the same plane; The thickness of the sidewall of the extended channel (14) between itself and the outer sidewall of the adjacent distribution plate (1) is T, and T is set to 12mm to 20mm.

8. The distribution plate for a wet spraying machine according to any one of claims 1 to 7, characterized in that, The distribution plate (1) has a split structure; It includes: The disc body (17) has at least four mounting cavities; The first connector body (18) has the first inner hole (12) disposed on the first connector body (18); The second connector body (19) has the second inner hole (13) located on it. The disc body (17) is made of a different material than the first connector body (18) and the second connector body (19). The disc body (17) is made of non-metallic material.

9. The distribution plate for a wet spraying machine according to claim 8, characterized in that, The first connector body (18) and the second connector body (19) are made of metal materials, including any one of stainless steel, high-quality carbon steel and alloy steel; The first connector body (18) and the second connector body (19) are made of the same material or different materials; The first connector body (18) is made of any one of high-quality carbon steel or alloy steel; The second connector body (19) is made of any one of 304 stainless steel, 316 stainless steel, or 316L stainless steel; And / or, The non-metallic material has a Shore hardness value of 60A to 70A, and the non-metallic material is any one of polyurethane or rubber.

10. The distribution plate for a wet spraying machine according to claim 9, characterized in that, Also includes: A first mounting cavity (171) is provided along the axis for mounting the first connector body (18). The second mounting cavity (172) is configured as three in a radial arrangement for mounting the second connector; The first mounting cavity (171) and the second mounting cavity (172) are connected at their ends near the center of the distribution plate (1); The first engaging protrusion (173) is provided on the radial sidewall of the first mounting cavity (171) and protrudes radially toward the central axis of the first mounting cavity (171); there are at least two, and they are distributed at intervals along the axial direction of the first mounting cavity (171); The first engagement groove is provided on the radial outer side wall of the first connector body (18) for engaging with the first engagement protrusion (173); The second engagement protrusion (174) is provided on the radial sidewall of the second mounting cavity (172) and protrudes radially toward the central axis of the second mounting cavity (172); there are at least two of them, and they are distributed at intervals along the axial direction of the second mounting cavity (172); The first engagement groove is provided on the radial outer side wall of the second connector body (19) for engaging with the second engagement protrusion (174); The third engagement protrusion (175) is provided on the axial side wall of the second mounting cavity (172) and protrudes axially away from the disc body (17); The third engagement groove is located on the axial outer side wall of the second connector body (19) and is used to engage with the third engagement protrusion (175).

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