Sprinkler device for shotcrete

Abstract

The present invention provides a nozzle device for shotcrete, which mainly relates to the technical field of wet concrete spraying equipment. The nozzle device for shotcrete includes a nozzle device for shotcrete, including a feed pipe, a liquid supply assembly, a nozzle assembly, and an air supply pipe. The nozzle assembly is detachably mounted on one end of the feed pipe, the liquid supply assembly is arranged in the feed pipe and communicated with the feed pipe, and the air supply pipe is arranged in the nozzle assembly and communicated with the feed pipe. The beneficial effect of the present invention is that when spraying concrete, the mixing effect of the accelerator and concrete can be greatly improved through the mutual cooperation between the feed pipe, the liquid supply assembly, the nozzle assembly, and the air supply pipe, and the concrete in the nozzle assembly is broken up by high-pressure gas, thereby ensuring that the accelerator is evenly dispersed in the concrete.

Description

Technical Field

[0001] The invention mainly relates to the technical field of concrete wet spraying equipment, in particular to a spray head device for spraying concrete. Background Art

[0002] In construction projects, shotcrete is a common construction method, widely used in support and reinforcement projects in the fields of tunnels, subways, mines, water conservancy, and construction. There are some problems with the traditional shotcrete construction method, such as the poor mixing effect of concrete and accelerator, which leads to uneven setting time and strength of concrete, affecting the quality of the project. At the same time, the design of traditional nozzle devices is often not flexible and efficient enough, and it is difficult to meet the needs of modern construction for efficient, uniform, and high-quality spraying.

[0003] The existing Chinese patent with publication number CN 118385045 A discloses a concrete wet spraying machine nozzle, which includes a mounting pipe, a delivery pipe, an air supply assembly and a spiral guide plate. The air supply assembly simultaneously supplies air to the gap between the outer wall of the delivery pipe and the inner wall of the mounting pipe, and under the inclined guidance of the spiral guide plate, the gas can flow in a spiral inside the mounting pipe, that is, the gas can approach the axis of the mounting pipe inside the mounting pipe, and the gas can flow inside the mounting pipe along the axis of the mounting pipe. During the flow, the gas can cut the concrete sprayed into the mounting pipe from the delivery pipe. Since the gas carries an accelerator at this time, the accelerator will be fully mixed with the concrete when the gas cuts the concrete, thereby improving the hardness of the mixture of the accelerator and the concrete.

[0004] However, this concrete sprinkler has the following defects when used specifically:

[0005] 1. When the concrete nozzle in the prior art is used, due to the large diameters of the concrete delivery pipe and the installation pipe, the accelerator entering the installation pipe first contacts the concrete near the inner wall of the pipe, and the accelerator is difficult to penetrate into the concrete at the center, thereby affecting the mixing effect of the concrete and the accelerator, resulting in uneven distribution of the accelerator inside the concrete;

[0006] 2. In the prior art, a concrete nozzle is provided with a plurality of evenly distributed spiral guide plates in the delivery pipe, and the spiral guide plates are used to guide the movement path of the gas in the delivery pipe. However, when the density of concrete is high during use, the concrete will fill the gaps between the spiral guide plates, which greatly reduces the guiding effect of the spiral guide plates, making it difficult for the compressed air to move along the predetermined route, affecting the cutting effect of the compressed air on the concrete, and further affecting the mixing effect between the concrete and the accelerator. Summary of the invention

[0007] In order to solve the deficiencies of the prior art, the present invention provides a spray head device for shotcrete. To achieve the above-mentioned purpose, the present invention is implemented through the following technical solutions:

[0008] A spray head device for shotcrete comprises a feed pipe, a liquid supply assembly, a spray head assembly and an air supply pipe, wherein one end of the feed pipe is detachably mounted with the spray head assembly, the liquid supply assembly is arranged in the feed pipe and communicated with the feed pipe, and the air supply pipe is arranged in the spray head assembly and communicated with the feed pipe;

[0009] Wherein, the liquid supply component includes:

[0010] A spiral blade is fixedly installed on one side of the feed pipe close to the nozzle assembly, and the spiral blade is a hollow structure;

[0011] A liquid supply pipe, wherein a plurality of liquid supply pipes are fixedly installed on one side of the top surface of the liquid supply pipe, wherein the liquid supply pipes vertically penetrate the liquid supply pipe and extend into the spiral blade and are connected thereto, and a plurality of evenly distributed liquid discharge holes are provided on one side of the spiral blade facing the nozzle assembly.

[0012] Furthermore, the nozzle assembly includes a nozzle body and a diverter and mixing assembly. The nozzle body is detachably mounted on one end of a feed pipe, and the diverter and mixing assembly is arranged on a side of the nozzle body close to the spiral blade. The air supply pipe is passed through one side of the top surface of the nozzle body, and one end of the air supply pipe extends into the nozzle body, and the exhaust end of the air supply pipe passes through the diverter and mixing assembly and is arranged opposite to the discharge port of the nozzle body.

[0013] Furthermore, the diversion and mixing assembly is a cylindrical block, which is fixedly installed on one side of the nozzle body close to the feed pipe, and one side of the cylindrical block is provided with a plurality of evenly distributed spiral grooves, and the air supply pipe is located in a section inside the nozzle body that transversely passes through the center of the cylindrical block and is fixedly connected thereto.

[0014] Furthermore, one end of the liquid supply pipe connected to the nozzle body is integrally fixedly installed with an external threaded connector, and one end of the nozzle body is integrally fixedly installed with an internal threaded connector seat that matches the external threaded connector, and a sealing ring is provided in the internal threaded connector seat that abuts against the end of the external threaded connector.

[0015] Furthermore, a support plate is fixedly installed inside the nozzle body, a telescopic rod is fixedly installed on the side of the support plate facing the air supply pipe, a conical guide block is rotatably installed on the movable end of the telescopic rod, a plurality of evenly distributed fan blades are fixedly installed on the outer periphery of the conical guide block, and the conical guide block is arranged opposite to the air supply pipe.

[0016] Furthermore, the telescopic rod comprises:

[0017] A fixing rod, one end of which is fixedly connected to one side of the supporting plate;

[0018] A sliding sleeve, one end of which is a closed structure, and the sliding sleeve is slidably mounted outside the fixed rod, and the conical guide block is rotatably mounted on the outer side of the sliding sleeve through a bearing;

[0019] A spring is fixedly installed on one end of the fixing rod located in the sliding sleeve, and one end of the spring is fixedly connected to a corresponding side of the inner wall of the sliding sleeve.

[0020] Furthermore, the top and bottom of the inner wall of the sliding sleeve are respectively provided with sliding grooves, and the top and bottom of the fixing rod are respectively fixedly installed with limit blocks, and the limit blocks are respectively slidably fitted in the sliding grooves opposite thereto.

[0021] Furthermore, a flange is fixedly mounted on one end of the feed pipe away from the nozzle assembly.

[0022] Furthermore, a liquid storage box is fixedly installed on the top of the feed pipe, the liquid supply pipes are connected with the liquid storage box, and a connecting pipe connected with the liquid storage box is fixedly installed on the top of the liquid storage box.

[0023] Furthermore, the feed pipe and the nozzle body are both conical structures that are larger on the left and smaller on the right, the spiral blades are arranged along the shape of the feed pipe to be a conical structure that is larger on the left and smaller on the right, and the discharge port of the nozzle body is in a flared shape.

[0024] Compared with the prior art, the beneficial effects of the present invention are:

[0025] 1. When spraying concrete, the flow of concrete is guided by setting spiral blades in the feed pipe. The design of the drainage holes on the spiral blades enables the injection of small amounts of accelerator during the flow of concrete, greatly improving the mixing effect of accelerator and concrete. At the same time, the concrete is dislocated due to the difference in friction between the inner and outer layers during the movement of the spiral blades, which further promotes the mixing of concrete and the accelerator, ensuring that the accelerator is evenly dispersed inside the concrete.

[0026] 2. The diversion mixing component arranged inside the nozzle assembly can divert the concrete to achieve the division of the concrete. After the concrete is mixed again through the diversion mixing component, the compressed air provided by the air supply pipe can spray the concrete outward, and the impact of the compressed air on the concrete can achieve the re-dispersion and mixing of the concrete, further improving the mixing uniformity of the concrete and the accelerating setting agent and improving the use effect of the device.

[0027] 3. The design of the conical guide block and fan blades set in the nozzle body enables the compressed air to impact the concrete more evenly, improving the dispersion effect of the concrete. The design of the telescopic rod and spring allows the conical guide block to move and rotate to a certain extent when impacted by the airflow, ensuring the disturbance effect of the conical guide block on the compressed air and further enhancing the mixing effect of the concrete. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the structure of the present invention;

[0029] Figure 2 It is a right side view of the present invention;

[0030] Figure 3 It is a left side view of the present invention;

[0031] Figure 4 is along Figure 2 Schematic diagram of the cross-sectional structure along the AA line;

[0032] Figure 5 It is a structural schematic diagram of the feed pipe of the present invention;

[0033] Figure 6 It is a structural schematic diagram of the nozzle body of the present invention;

[0034] Figure 7 yes Figure 4 A partial enlarged view of Ⅰ.

[0035] Numbers shown in the accompanying drawings: 10, feed pipe; 20, liquid supply assembly; 201, spiral blade; 202, liquid supply pipe; 203, drainage hole; 204, liquid storage box; 205, connecting pipe; 30, nozzle assembly; 301, nozzle body; 302, support plate; 40, air supply pipe; 50, diversion mixing assembly; 501, columnar block; 502, spiral through groove; 60, external thread connector; 601, internal thread connector; 602, sealing ring; 70, telescopic rod; 701, fixed rod; 702, sliding sleeve; 703, spring; 704, slide groove; 705, limit block; 80, conical guide block; 801, fan blade; 90, flange. DETAILED DESCRIPTION

[0036] The present invention will be further described with reference to the accompanying drawings and specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention. In addition, it should be understood that after reading the content taught by the present invention, those skilled in the art may make various changes or modifications to the present invention, and these equivalent forms also fall within the scope limited by the application.

[0037] Example: Sprinkler device for shotcrete

[0038] like Figure 1-7 As shown, the spray head device for shotcrete comprises:

[0039] A feed pipe 10, a liquid supply assembly 20, a nozzle assembly 30, and an air supply pipe 40. The nozzle assembly 30 is detachably mounted on one end of the feed pipe 10. The liquid supply assembly 20 is disposed in the feed pipe 10 and communicated therewith. The air supply pipe 40 is disposed in the nozzle assembly 30 and communicated therewith.

[0040] Wherein, the liquid supply component 20 includes:

[0041] A spiral blade 201 is fixedly installed on one side of the feed pipe 10 close to the nozzle assembly 30, and the spiral blade 201 is a hollow structure;

[0042] The liquid supply pipe 202 has several liquid supply pipes 202 fixedly installed on one side of the top surface of the feed pipe 10. The liquid supply pipe 202 vertically penetrates the feed pipe 10 and extends into the spiral blade 201 and is connected thereto. The liquid supply pipe 202 penetrates the liquid supply pipe 202 and the spiral blade 201 from top to bottom in sequence and is fixedly connected to the liquid supply pipe 202 and the spiral blade 201 respectively. One end of the liquid supply pipe 202 is located in the spiral blade 201 and is connected thereto. The spiral blade 201 has a side facing the nozzle assembly 30 and is provided with a plurality of evenly distributed liquid discharge holes 203.

[0043] The above working principle: Specific reference Figure 1 When performing wet spraying of concrete, the device is installed on the wet spraying machine for use. The feed pipe 10 is connected to a feed pump. The liquid supply pipe 202 is used to provide an accelerator to the feed pipe 10. The feed pump can pump concrete into the feed pipe 10 to combine with the accelerator, and make the concrete flow along the feed pipe 10 into the nozzle assembly 30 and then be sprayed out. The air supply pipe 40 can supply air of a certain pressure to the nozzle assembly 30, thereby providing corresponding power for the spraying of concrete. The wet spraying machine and the supply pump are both existing equipment in the wet spraying construction process of concrete in the prior art, and their specific structures and working principles are not described in detail here.

[0044] After the concrete enters the feeding pipe 10, it continues to move along the feeding pipe 10. The concrete first passes through the spiral blade 201 and moves along the rotation path of the spiral blade 201. At this time, the accelerator is supplied to the spiral blade 201 through the liquid supply pipe 202. The accelerator is directly injected into the concrete through the drainage hole 203 on the outside of the spiral blade 201 and mixed with the concrete. During the movement of the concrete along the spiral blade 201, the accelerator is injected in small amounts and multiple times through the drainage holes 203 at different positions, which can greatly improve the mixing effect of the accelerator and the concrete and make the accelerator more evenly dispersed in the concrete. At the same time, during the movement of the concrete along the spiral blade 201, due to the difference in friction between the inner and outer layers of the concrete, the concrete will be dislocated when moving along the spiral blade 201, thereby achieving the stirring effect of the concrete, further promoting the mixing of the accelerator and the concrete, and improving the mixing effect of the accelerator and the concrete, wherein the outer side of the concrete refers to the part of the concrete that is in direct contact with the surface of the spiral blade 201 and the surface of the feeding pipe 10.

[0045] In order to prevent the concrete from flowing back into the spiral blade 201 through the drainage hole 203, a one-way valve may be provided in the drainage hole 203 to further improve the reliability of the device.

[0046] Specific reference Figure 4 The nozzle assembly 30 includes a nozzle body 301 and a diversion mixing assembly 50. The nozzle body 301 is detachably mounted on one end of the feed pipe 10. The diversion mixing assembly 50 is arranged on a side of the nozzle body 301 close to the spiral blade 201. The air supply pipe 40 is penetrated on one side of the top surface of the nozzle body 301. The air supply pipe 40 passes through the nozzle body 301 and is fixedly connected thereto. One end of the air supply pipe 40 extends into the nozzle body 301, and the exhaust end of the air supply pipe 40 passes through the diversion mixing assembly 50 and is arranged opposite to the discharge port of the nozzle body 301.

[0047] When the concrete enters the nozzle body 301, the concrete can be diverted through the diversion mixing component 50, so that the concrete is mixed again after passing through the diversion mixing component 50, and compressed air is provided through the air supply pipe 40 to spray the concrete outward, so as to achieve the effect of dispersing and then mixing the concrete, further improve the mixing effect between the mixed soil and the accelerator, and improve the uniformity of the concrete and the accelerator.

[0048] Specific reference Figure 6The diversion and mixing component 50 is a cylindrical block 501, which is fixedly installed on the side of the nozzle body 301 close to the feed pipe 10, and a plurality of evenly distributed spiral grooves 502 are opened on one side of the cylindrical block 501, and all of the spiral grooves 502 are staggered with each other. The air supply pipe 40 is located in a section inside the nozzle body 301, transversely passes through the center of the cylindrical block 501 and is fixedly connected thereto.

[0049] When concrete flows from the feed pipe 10 into the nozzle body 301, it will first encounter the diversion mixing assembly 50. When the concrete flows through the columnar block 501, the spiral groove 502 on the columnar block 501 diverts the concrete flow, allowing the concrete to flow along different spiral paths. This design not only helps to evenly distribute the concrete, but also increases the mixing opportunities of the concrete and the accelerator. After the concrete passes through the diversion mixing assembly 50, it converges again and is ready to be sprayed out. At the same time, the compressed air provided by the air supply pipe 40 passes through the center of the columnar block 501 and mixes with the concrete in the nozzle body 301, and the concrete is sprayed out. This method of dispersion and then mixing further improves the mixing effect of the concrete and the accelerator.

[0050] One end of the liquid supply pipe 202 connected to the nozzle body 301 is integrally fixedly installed with an external thread connector 60, and one end of the nozzle body 301 is integrally fixedly installed with an internal thread connector seat 601 matched with the external thread connector 60, and a sealing ring 602 is provided in the internal thread connector seat 601 to abut against the end of the external thread connector 60. The connection between the liquid supply pipe 202 and the nozzle body 301 is achieved through the external thread connector 60 and the internal thread connector seat 601. This design not only ensures the firmness of the connection, but also prevents liquid leakage through the sealing ring 602.

[0051] A support plate 302 is fixedly installed in the nozzle body 301, and a telescopic rod 70 is fixedly installed on the side of the support plate 302 facing the air supply pipe 40. A conical guide block 80 is rotatably installed on the movable end of the telescopic rod 70, and a plurality of evenly distributed fan blades 801 are fixedly installed on the outer periphery of the conical guide block 80, and the conical guide block 80 is arranged opposite to the air supply pipe 40. When the compressed air is ejected from the air supply pipe 40, the compressed air will impact the conical guide block 80 and the fan blades 801 thereon, and drive the fan blades 801 to rotate, which is helpful to achieve the disturbance of the compressed air, so that the compressed air can impact the concrete more evenly, improve the dispersion effect of the concrete, make the concrete continuously dispersed and fused, improve the mixing effect of the concrete and the quick-setting agent, and increase the uniformity of the concrete during spraying. At the same time, the telescopic rod 70 allows the conical guide block 80 to move and rotate to a certain extent when it is impacted by the air flow, so that the conical guide block 80 can produce different rotation speeds and displacements, improve the disturbance effect of the compressed air in the device, and further enhance the mixing effect of the concrete.

[0052] Specific reference Figure 7 , the telescopic rod 70 includes:

[0053] A fixing rod 701, one end of which is fixedly connected to one side of the support plate 302;

[0054] A sliding sleeve 702, one end of which is a closed structure, and the sliding sleeve 702 is slidably mounted outside the fixed rod 701, and the conical guide block 80 is rotatably mounted on the outer side of the sliding sleeve 702 through a bearing;

[0055] Spring 703 , one end of the fixing rod 701 located in the sliding sleeve 702 is fixedly mounted with the spring 703 , and one end of the spring 703 is fixedly connected to a corresponding side of the inner wall of the sliding sleeve 702 .

[0056] The top and bottom of the inner wall of the sliding sleeve 702 are respectively provided with sliding grooves 704, and the top and bottom of the fixing rod 701 are respectively fixedly installed with limit blocks 705, and the limit blocks 705 are respectively slidably fitted in the sliding grooves 704 opposite thereto.

[0057] When the compressed air ejected from the air supply pipe 40 impacts the conical guide block 80, the conical guide block 80 and the fan blades 801 thereon will be subjected to a backward force, at which time the sliding sleeve 702 will slide backward along the fixed rod 701, and the spring 703 will be compressed; when the airflow weakens, the elastic force of the spring 703 will reset the sliding sleeve 702 and the conical guide block 80. This design not only allows the conical guide block 80 to move and rotate when impacted by the airflow, but also realizes the automatic reset of the conical guide block 80 through the elastic force of the spring 703. At the same time, the design of the sliding groove 704 and the limit block 705 ensures the stable sliding of the sliding sleeve 702 on the fixed rod 701;

[0058] In order to further improve the stability of the telescopic rod 70, a through hole is provided at one end of the fixed rod 701 located in the sliding sleeve 702, and a limiting groove connected to the through hole is provided in the fixed rod 701. The limiting groove and the through hole are slidably cooperated to install a T-shaped sliding rod, and one end of the T-shaped sliding rod is fixedly connected to the center of the inner side of the sliding sleeve 702. This structural design can further improve the stability of the sliding sleeve 702 during movement, thereby increasing the stability of the conical guide block 80 and improving the spoiler effect of the device.

[0059] The end of the feed pipe 10 away from the nozzle assembly 30 is fixedly mounted with a flange 90. The design of the flange 90 allows the nozzle device for shotcrete to be easily connected to other equipment (such as a wet spraying machine). The installation and removal of the nozzle device for shotcrete can be achieved by fixing the flange 90 with the flanges of other equipment through fasteners such as bolts. This design not only improves the flexibility of the equipment, but also facilitates the maintenance and replacement of the equipment.

[0060] A liquid storage box 204 is fixedly installed on the top of the feed pipe 10, and the liquid supply pipes 202 are all connected to the liquid storage box 204, and a connecting pipe 205 connected to the liquid storage box 204 is fixedly installed on the top of the liquid storage box 204. The liquid storage box 204 is designed to store the accelerating agent and transport it to the spiral blade 201 through the liquid supply pipe 202. The design of the connecting pipe 205 makes it easy to add the accelerating agent to the liquid storage box 204 through an external device such as a pump. When the accelerating agent in the liquid storage box 204 is reduced, it can be replenished through the connecting pipe 205. This design not only ensures a stable supply of accelerating agent, but also improves the reliability and durability of the equipment.

[0061] Specific reference Figure 4 The feed pipe 10 and the nozzle body 301 are both conical structures with a larger left side and a smaller right side. The spiral blade 201 is set to a conical structure with a larger left side and a smaller right side along the feed pipe 10, and the discharge port of the nozzle body 301 is flared. When this structural design is used, since the feed pipe 10 and the spiral blade 201 are both conical structures with a larger left side and a smaller right side, when the concrete moves from left to right along the feed pipe 10, the greater the squeezing force of the concrete by the feed pipe 10 and the spiral blade 201, the friction between the outer layer of the concrete and the spiral blade 201 and the inner wall of the feed pipe 10 will further increase. At the same time, since the cross-sectional area of ​​the concrete becomes smaller, the friction difference between the inner and outer layers of the concrete will also increase, thereby further amplifying the dislocation phenomenon of the concrete, further promoting the mixing between the concrete and the accelerator, and improving the mixing effect of the concrete and the accelerator; the conical structural design of the feed pipe 10 and the spiral blade 201 causes the concrete to be subjected to a gradually increasing squeezing force during the flow process. This design not only helps to evenly distribute the concrete and mix the accelerator, but also improves the density and strength of the concrete; the expanded discharge port of the nozzle body 301 can make the sprayed material cover a larger area, ensuring that the sprayed concrete is more evenly distributed on the target surface, improving the consistency of the spraying thickness of the device and improving construction efficiency.

[0062] In the explanation of the present invention, it should be noted that the terminology indicating the orientation is only for the convenience of description and understanding, and is not the only limitation on the installation position of the specific technical features, and does not exclude other possible installation methods.

[0063] Finally, it should be noted that 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 aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A nozzle device for shotcrete spraying, characterized in that: It comprises a feed pipe (10), a liquid supply assembly (20), a nozzle assembly (30), and an air supply pipe (40); one end of the feed pipe (10) is detachably mounted with the nozzle assembly (30); the liquid supply assembly (20) is disposed in the feed pipe (10) and is in communication with the feed pipe; and the air supply pipe (40) is disposed in the nozzle assembly (30) and is in communication with the feed pipe; Wherein, the liquid supply component (20) comprises: A spiral blade (201), wherein the spiral blade (201) is fixedly mounted on a side of the feed pipe (10) close to the nozzle assembly (30), and the spiral blade (201) is a hollow structure; A liquid supply pipe (202), wherein a plurality of liquid supply pipes (202) are fixedly mounted on one side of the top surface of the supply pipe (10), wherein the liquid supply pipe (202) vertically penetrates the supply pipe (10) and extends into and is in communication with the spiral blade (201), and a plurality of evenly distributed liquid discharge holes (203) are formed on a side of the spiral blade (201) facing the nozzle assembly (30); the nozzle assembly (30) comprises a nozzle body (301), a flow splitting and mixing assembly (50), and the nozzle body The nozzle body (301) is detachably mounted on one end of the feed pipe (10), the flow splitting and mixing assembly (50) is arranged on a side of the nozzle body (301) close to the spiral blade (201), the air supply pipe (40) is passed through one side of the top surface of the nozzle body (301), one end of the air supply pipe (40) extends into the nozzle body (301), and the exhaust end of the air supply pipe (40) passes through the flow splitting and mixing assembly (50) and is arranged opposite to the discharge port of the nozzle body (301); A support plate (302) is fixedly mounted inside the nozzle body (301); a telescopic rod (70) is fixedly mounted on a side of the support plate (302) facing the air supply pipe (40); a conical guide block (80) is rotatably mounted on the movable end of the telescopic rod (70); a plurality of evenly distributed fan blades (801) are fixedly mounted on the outer periphery of the conical guide block (80); and the conical guide block (80) is arranged opposite to the air supply pipe (40); The telescopic rod (70) comprises: A fixing rod (701), one end of which is fixedly connected to one side of the support plate (302); A sliding sleeve (702), one end of the sliding sleeve (702) being a closed structure, and the sliding sleeve (702) being slidably mounted outside the fixed rod (701), and the conical guide block (80) being rotatably mounted on the outside of the sliding sleeve (702) via a bearing; A spring (703), wherein one end of the fixing rod (701) located inside the sliding sleeve (702) is fixedly mounted with the spring (703), and one end of the spring (703) is fixedly connected to a corresponding side of the inner wall of the sliding sleeve (702); The top and bottom of the inner wall of the sliding sleeve (702) are respectively provided with sliding grooves (704), and the top and bottom of the fixing rod (701) are respectively fixedly installed with limit blocks (705), and the limit blocks (705) are respectively slidably fitted in the sliding grooves (704) opposite thereto.

2. The spray head device for shotcrete according to claim 1, characterized in that: The flow-dividing and mixing assembly (50) is a columnar block (501), which is fixedly mounted on a side of the nozzle body (301) close to the feed pipe (10), and a plurality of evenly distributed spiral through grooves (502) are provided on one side of the columnar block (501). The air supply pipe (40) is located in a section inside the nozzle body (301) that transversely penetrates the center of the columnar block (501) and is fixedly connected to the columnar block (501).

3. The spray head device for shotcrete according to claim 2, characterized in that: An external threaded connector (60) is integrally fixedly mounted on one end of the liquid supply pipe (202) connected to the nozzle body (301), and an internal threaded connector seat (601) matching the external threaded connector (60) is integrally fixedly mounted on one end of the nozzle body (301), wherein a sealing ring (602) is provided inside the internal threaded connector seat (601) and abuts against the end of the external threaded connector (60).

4. The spray head device for shotcrete according to claim 1, characterized in that: The end of the feed pipe (10) away from the spray head assembly (30) is fixedly mounted with a flange (90).

5. The spray head device for shotcrete according to claim 1, characterized in that: A liquid storage box (204) is fixedly mounted on the top of the feed pipe (10), the liquid supply pipes (202) are connected to the liquid storage box (204), and a connecting pipe (205) connected to the liquid storage box (204) is fixedly mounted on the top of the liquid storage box (204).

6. The spray head device for shotcrete according to claim 1, characterized in that: The feed pipe (10) and the nozzle body (301) are both conical structures that are larger on the left and smaller on the right. The spiral blade (201) is arranged along the shape of the feed pipe (10) to be a conical structure that is larger on the left and smaller on the right. The discharge port of the nozzle body (301) is in a flared shape.

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