Conveying control valve of wet-type concrete spraying machine

Abstract

The invention relates to a conveying control valve of a wet-type concrete spraying machine, and relates to the technical field of control valves. Comprising a valve body, the two sides of the valve body are connected with pipe bodies, the side, located on the valve body, of each pipe body is connected with an inflation sealing ring, each inflation sealing ring is composed of an outer ring and an inflatable sealing gasket, and a rotary disc is arranged on the top face of the valve body. When the valve plate needs to be adjusted, the rotating ring is pulled to move downwards, the rotating ring moves to drive the piston plate to move, and the piston plate moves to complete air exhaust operation of the inflatable sealing ring, so that a sealing gasket of the inflatable sealing ring is separated from the valve plate, abrasion to the sealing ring in the valve plate adjusting process is reduced, and after the valve is adjusted, the sealing ring is not damaged. The rotating ring is pressed to complete inflation operation of the inflation sealing ring groove so that the sealing ring can be tightly attached to the surface of the valve plate, the sealing ring can deform under the influence of gas pressure in the attaching process and is tightly attached to the inner side of a hole subjected to erosive wear in the surface of the valve plate, and the sealing effect between the inflation sealing ring and the valve plate is guaranteed.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of control valves, in particular to a conveying control valve of a wet type concrete spraying machine. BACKGROUND

[0002] The concrete spraying machine is a special equipment for concrete spraying construction by compressed air, mainly applied to the supporting operation of underground protection engineering such as tunnels, subways and culverts, and the equipment realizes the accurate mixing and high-pressure spraying of concrete aggregate and quick-setting agent by the coordinated operation of the mechanical power system and the pneumatic conveying system, and the core function is to spray the concrete to the working surface by high-pressure conveying and atomization, so as to quickly form a dense supporting layer or structural layer, and the concrete spraying machine has dry spraying machine, wet spraying machine, humid spraying machine, hydraulic wet spraying machine and pneumatic spraying machine, etc., wherein the wet spraying machine is usually equipped with a conveying control valve.

[0003] In the prior art, the valve plate rubs against the sealing ring inside the valve body during the starting or closing process, which causes the sealing ring to wear, and the worn sealing ring will have holes and gaps after being attached to the valve plate, and the sand and stones in the concrete will gradually accumulate in the gaps, which will affect the closing and opening of the valve plate, making it difficult to close or open the valve plate, and the accumulated sand and stones during the opening and closing process of the valve plate will further wear the sealing ring, causing a vicious cycle and reducing the service life of the control valve.

[0004] In view of the above problems, it is urgent to make innovative design on the basis of the original. SUMMARY

[0005] The present application aims to provide a conveying control valve of a wet type concrete spraying machine to solve the problem that the valve plate of the conveying control valve rubs against the sealing ring inside the valve body during the starting or closing process, causing the sealing ring to wear, and the worn sealing ring will have holes and gaps after being attached to the valve plate, and the sand and stones in the concrete will gradually accumulate in the gaps, which will affect the closing and opening of the valve plate, making it difficult to close or open the valve plate, and the accumulated sand and stones during the opening and closing process of the valve plate will further wear the sealing ring, causing a vicious cycle and reducing the service life of the control valve, and the technical solution of the present application provides a solution significantly different from the prior art.

[0006] In order to achieve the above object, the present application provides the following technical scheme: a delivery control valve of a wet type concrete spraying machine, comprising a valve body, pipe bodies connected to both sides of the valve body, an inflatable sealing ring connected to one side of the valve body, the inflatable sealing ring being composed of an outer ring and an inflatable sealing pad, a rotating disc arranged on the top surface of the valve body, an extension rod connected to the bottom of the rotating disc, a threaded sleeve slidingly connected to the extension rod, the threaded sleeve being rotationally connected to the valve body, a valve rod threadedly connected to the threaded sleeve, the valve rod being slidingly connected to the valve body, a valve plate connected to the bottom of the valve rod, a rotating ring rotationally connected to the bottom of the rotating disc, a transmission rod connected to the bottom of the rotating ring, a gas tank connected to the inner side of the valve body, a connecting spring connected to the inner side of the gas tank, a piston plate connected to the bottom end of the connecting spring, and the gas tank being connected to the inflatable sealing ring through a gas pipe. A cleaning assembly is arranged on the inner side of the valve body, and a limiting assembly is arranged above the inner side of the valve body.

[0007] Preferably, the cleaning assembly has a ratchet wheel connected to the inner side of the valve body, the outer ring of the ratchet wheel being rotationally connected to the valve body through a hollow bearing, a semicircular protrusion being arranged on the inner ring side of the ratchet wheel, the transmission rod being provided with a rotating groove, the semicircular protrusion of the inner ring of the ratchet wheel being located in the rotating groove of the transmission rod, a gear being connected to the top of the inner side of the valve body through a hollow bearing, a reciprocating screw rod being fixedly sleeved with the gear, the reciprocating screw rod being meshingly connected to the outer ring of the ratchet wheel, the gear further sleeving a reciprocating block, the reciprocating block being connected with a cleaning rod, the cleaning rod being slidingly connected to the valve body, a sliding rod being slidingly connected to the bottom of the valve body, and a bottom plate being connected to the bottom of the sliding rod.

[0008] Preferably, the limiting assembly has a rotating rod rotationally connected to the outer side of the valve body, the rotating rod being connected to a one-way screw rod through a bevel gear set at one end of the inner side of the valve body, the one-way screw rod being rotationally connected to the valve body, a lifting rod being threadedly connected to the one-way screw rod, a limiting block being connected to the outer side of the lifting rod through a spring, a limiting groove being arranged on the inner side of the rotating ring, and the limiting groove having the same size as the limiting block.

[0009] Preferably, a limiting protrusion is arranged on the outer side of the extension rod, and the limiting protrusion is slidingly connected to the threaded sleeve.

[0010] Preferably, a guide rod is connected to the top of the piston plate, the guide rod being slidingly connected to the gas tank through a hole formed in the center of the connecting spring, a partition plate is connected to the inner side of the valve body, and the partition plate is arranged above the gas tank.

[0011] Preferably, a stretching spring is connected to the bottom of the extension rod, and the bottom end of the stretching spring is connected to the bottom of the threaded sleeve.

[0012] Preferably, a rotating plate is connected to the inner side of the valve body, and the rotating plate is rotationally connected to the reciprocating screw rod.

[0013] Preferably, a return spring is connected to the bottom of the valve body, and the bottom end of the return spring is connected to the base plate. A limit rod is connected above the base plate, and the limit rod passes through the central hole of the return spring and is slidably connected to the valve body.

[0014] Preferably, a push block is slidably connected in the rotating ring limiting groove, and the push block is made of stainless steel.

[0015] Compared with the prior art, the beneficial effects of the present invention are: 1. In this invention, when the valve plate needs to be adjusted, the rotating ring is pulled downwards. The movement of the rotating ring drives the piston plate to move. The movement of the piston plate can complete the evacuation operation of the inflatable sealing ring, so that the sealing gasket of the inflatable sealing ring is separated from the valve plate, reducing the wear of the sealing ring on the valve plate during adjustment. After the valve is adjusted, pressing the rotating ring completes the inflation operation of the inflatable sealing ring groove, so that the sealing ring is tightly attached to the surface of the valve plate. During the attachment process, the sealing ring will deform under the influence of gas pressure and tightly attach to the inside of the hole worn by erosion on the surface of the valve plate, ensuring the sealing effect between the inflatable sealing ring and the valve plate.

[0016] 2. In this invention, the downward movement of the rotating ring will drive the ratchet to rotate, the rotation of the ratchet will drive the gear to rotate, and the rotation of the gear will cause the reciprocating block and the cleaning rod to perform vertical reciprocating motion. During the reciprocating motion of the cleaning rod, the sand and gravel on the surface of the inflatable sealing ring will be cleaned, reducing the wear of the rubber pad caused by sand and gravel adsorption.

[0017] 3. In this invention, the rotating ring can be limited and fixed by setting a limiting block, which further improves the stability of the rotating ring after adjustment. Furthermore, the height of the lifting rod can be adjusted by rotating the rotating rod, and the downward pressure of the piston plate can be adjusted. In turn, the inflation amount of the inflatable sealing ring can be adjusted, so that the sealing gasket of the inflatable sealing ring can be tightly attached to the valve plate surface under different wear conditions. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the main structure of the present invention; Figure 2 This is a schematic diagram of the interior of the valve body of the present invention; Figure 3 This is a schematic diagram of the internal frame structure of the valve body of the present invention; Figure 4 For the present invention Figure 3 Enlarged structural diagram at point A; Figure 5 This is a schematic diagram of the side structure of the valve body of the present invention; Figure 6 For the present invention Figure 5 Enlarged structural diagram at point B; Figure 7 For the present inventionFigure 5 Enlarged structural diagram at point C; Figure 8 This is a schematic diagram of the connection structure between the air box and the air-filled sealing ring of the present invention; Figure 9 This is a schematic diagram of the side structure of the cleaning component of the present invention; Figure 10 This is a schematic diagram of the ratchet and gear connection structure of the present invention; Figure 11 This is a schematic diagram of the top surface structure of the cleaning component of the present invention.

[0019] In the diagram: 1. Valve body; 2. Pipe body; 3. Inflatable sealing ring; 4. Turntable; 5. Telescopic rod; 6. Threaded sleeve; 7. Valve stem; 8. Valve plate; 9. Rotary ring; 10. Transmission rod; 11. Air box; 12. Connecting spring; 13. Piston plate; 14. Cleaning assembly; 141. Ratchet; 142. Gear; 143. Reciprocating screw; 144. Reciprocating block; 145. Cleaning rod; 146. Sliding rod; 147. Base plate; 15. Limiting assembly; 151. Rotating rod; 152. One-way screw; 153. Lifting rod; 154. Limiting block. Detailed Implementation

[0020] To further illustrate the technical means and effects adopted by the present invention in order to achieve the intended purpose, the following detailed description is provided in conjunction with the accompanying drawings and preferred embodiments, based on the specific implementation methods, structures, features and effects of the present invention.

[0021] Please see Figure 1 - Figure 11This invention provides a technical solution: a conveying control valve for a wet concrete spraying machine, comprising a valve body 1, with pipes 2 connected to both sides of the valve body 1, and an inflatable sealing ring 3 connected to one side of the pipes 2. The inflatable sealing ring 3 consists of an outer ring and an inflatable sealing gasket. A turntable 4 is provided on the top surface of the valve body 1, and a telescopic rod 5 is connected to the bottom of the turntable 4. A threaded sleeve 6 is slidably connected to the telescopic rod 5, and the threaded sleeve 6 is rotatably connected to the valve body 1. A valve stem 7 is threadedly connected to the threaded sleeve 6, and the valve stem 7 is slidably connected to the valve body 1. A valve plate 8 is connected to the bottom of the valve stem 7. A rotating ring 9 is rotatably connected to the bottom of the turntable 4, and a transmission rod 10 is connected to the bottom of the rotating ring 9. An air box 11 is connected to the inner frame of the valve body 1, and a connecting spring 12 is connected to the inner side of the air box 11, with the bottom end of the connecting spring 12 connected to... A piston plate 13 is connected to an air box 11, which is connected to an inflatable sealing ring 3 via an air pipe. When the valve plate 8 needs to be adjusted, the rotating ring 9 is pulled downward. The movement of the rotating ring 9 drives the transmission rod 10 downward, which in turn drives the piston plate 13 to move. The movement of the piston plate 13 can complete the air extraction operation of the inflatable sealing ring 3, so that the sealing gasket of the inflatable sealing ring 3 is separated from the valve plate 8, reducing the wear of the sealing ring during the adjustment of the valve plate 8. After the valve is adjusted, the rotating ring 9 is pressed to complete the air filling operation of the groove of the inflatable sealing ring 3, so that the sealing ring is tightly attached to the surface of the valve plate 8. During the sealing process, the sealing ring will deform under the influence of gas pressure and tightly attach to the inside of the eroded holes on the surface of the valve plate 8, thereby ensuring the sealing effect between the inflatable sealing ring 3 and the valve plate 8. Cleaning component 14 is disposed inside the valve body 1, and limiting component 15 is disposed above the inside of the valve body 1.

[0022] In one embodiment of the present invention, the cleaning assembly 14 has a ratchet 141 connected to the inner side of the valve body 1. The outer ring of the ratchet 141 is rotatably connected to the valve body 1 via a hollow bearing, and a semi-circular protrusion is provided on the inner ring side of the ratchet 141. The transmission rod 10 has a rotation groove, and the semi-circular protrusion of the inner ring of the ratchet 141 is located in the rotation groove of the transmission rod 10. A gear 142 is connected to the top of the inner side of the valve body 1 via a hollow bearing. A reciprocating screw 143 is fixedly sleeved on the gear 142, and the reciprocating screw 143 meshes with the outer ring of the ratchet 141. A reciprocating block is also sleeved on the gear 142. 144, the reciprocating block 144 is connected to the cleaning rod 145, and the cleaning rod 145 is slidably connected to the valve body 1. The bottom of the valve body 1 is slidably connected to the sliding rod 146, and the bottom of the sliding rod 146 is connected to the base plate 147. When the rotating ring 9 moves downward, it will drive the ratchet 141 to rotate. The rotation of the ratchet 141 will drive the gear 142 to rotate. The rotation of the gear 142 will cause the reciprocating block 144 and the cleaning rod 145 to perform vertical reciprocating motion. During the reciprocating motion of the cleaning rod 145, it will clean the sand and gravel on the surface of the inflatable sealing ring 3, reducing the wear of the rubber pad caused by sand and gravel adsorption. In one embodiment of the present invention, the limiting component 15 has a rotating rod 151 rotatably connected to the outside of the valve body 1. The rotating rod 151 is connected to a one-way screw 152 through a bevel gear set at one end of the rotating rod 151 on the inside of the valve body 1. The one-way screw 152 is rotatably connected to the valve body 1. A lifting rod 153 is threadedly connected to the top of the one-way screw 152. The lifting rod 153 is connected to a limiting block 154 through a spring at one end of the lifting rod 153 on the outside of the valve body 1. A limiting groove is opened on the inside of the rotating ring 9, and the size of the limiting groove is the same as that of the limiting block 154. By setting the limiting block 154, the rotating ring 9 can be limited and fixed, further improving the stability of the rotating ring 9 after adjustment. By rotating the rotating rod 151, the height of the lifting rod 153 can be adjusted, the downward pressure of the piston plate 13 can be adjusted, and the inflation amount of the inflatable sealing ring 3 can be adjusted, so that the sealing gasket of the inflatable sealing ring 3 can be tightly attached to the surface of the valve plate 8 under different wear conditions. As one embodiment of the present invention, a limiting protrusion is provided on the outer side of the telescopic rod 5, and the limiting protrusion is slidably connected to the threaded sleeve 6. By providing the limiting protrusion, the telescopic rod 5 can drive the threaded sleeve 6 to rotate during the rotation process. In one embodiment of the present invention, a guide rod is connected above the piston plate 13, and the guide rod passes through the hole formed in the center of the connecting spring 12 and is slidably connected to the air box 11. By providing the guide rod, the connecting spring 12 can be limited, reducing the occurrence of deformation and misalignment of the connecting spring 12. The guide rod can also limit the piston plate 13, improving the stability of the piston plate 13 during vertical movement. A partition is connected to the inner side of the valve body 1, and the partition is located above the air box 11. By providing the partition, the guide rod is prevented from colliding with other structures during the reset process. In one embodiment of the present invention, a tension spring is connected to the bottom of the telescopic rod 5, and the bottom end of the tension spring is connected to the bottom of the threaded sleeve 6. By providing the tension spring, the telescopic rod 5 can be quickly pulled downward. In one embodiment of the present invention, a rotating plate is connected to the inner side of the valve body 1, and the rotating plate is rotatably connected to the reciprocating screw 143. By setting the rotating plate to limit the reciprocating screw 143, the stability of the reciprocating screw 143 during rotation is improved. In one embodiment of the present invention, a return spring is connected to the bottom of the valve body 1, and the bottom end of the return spring is connected to the base plate 147. A limit rod is connected above the base plate 147, and the limit rod passes through the central hole of the return spring and is slidably connected to the valve body 1. By providing a return spring, the base plate 147 can be quickly pulled back to the initial position, and by providing a limit rod to limit the return spring, the occurrence of deformation and misalignment of the return spring is reduced. In one embodiment of the present invention, a push block is slidably connected in the limiting groove of the rotating ring 9, and the push block is made of stainless steel. By pushing the push block, the limiting block 154 can be moved, thereby facilitating the staff to quickly release the fixing of the limiting block 154.

[0023] Working principle: First, when the valve plate 8 is adjusted and sealing is required, the turntable 4 is loosened. The telescopic spring inside the threaded sleeve 6 will return to its original deformation and pull the telescopic rod 5 downward. The downward movement of the telescopic rod 5 drives the turntable 4 downward. The movement of the turntable 4 drives the rotating ring 9 downward. The movement of the rotating ring 9 pushes the transmission rod 10 downward. Since the surface of the transmission rod 10 has a rotating groove, and the semi-circular protrusion of the inner ring of the ratchet 141 is located in the rotating groove of the transmission rod 10, the vertical movement of the transmission rod 10 will drive the inner ring of the ratchet 141 to rotate clockwise. The clockwise rotation of the inner ring of the ratchet 141 drives the outer ring of the ratchet 141 to rotate. Since the outer ring of the ratchet 141 is in contact with the... The reciprocating screw 143 is engaged with the gear 142. Therefore, the rotation of the outer ring of the ratchet 141 will drive the reciprocating screw 143 to rotate. The rotation of the reciprocating screw 143 will drive the gear 142 to rotate. Since the gear 142 is engaged with the reciprocating block 144 and the reciprocating block 144 is slidably connected to the valve body 1, the rotation of the gear 142 will drive the reciprocating block 144 to perform vertical reciprocating motion. When the gear 142 starts to rotate, the reciprocating block 144 will move downward. The downward movement of the reciprocating block 144 will drive the cleaning rod 145 to move downward. The downward movement of the cleaning rod 145 will clean the sand and gravel on the surface of the uninflated sealing ring 3. Secondly, as the reciprocating block 144 moves downward, it will also engage with the sliding rod 146. After engaging with the sliding rod 146, the reciprocating block 144 will push the sliding rod 146 downward. The downward movement of the sliding rod 146 will cause the base plate 147 to move downward. The downward movement of the base plate 147 will open the bottom opening of the valve body 1, allowing the sand and gravel cleaned by the cleaning rod 145 to be discharged through the bottom opening of the valve body 1. When the semi-circular protrusion of the ratchet 141 is located in the middle section of the rotating groove, the rotation of the gear 142 will drive the reciprocating block 144 upward. The upward movement of the reciprocating block 144 will drive the reciprocating block 144 upward. Returning to the initial position, the semi-circular protrusion of the ratchet 141 will move along the straight line of the rotating groove of the transmission rod 10, causing the ratchet 141 to stop rotating. After the ratchet 141 stops rotating, the transmission rod 10 will still move downward. The transmission rod 10 moves downward and contacts the piston plate 13 inside the air box 11, pushing the piston plate 13 to move downward. Since the air box 11 is connected to the inflation sealing ring 3 through the air pipe, the downward movement of the piston plate 13 will push the gas into the inside of the inflation sealing ring 3 for inflation. The inflation of the inflation sealing ring 3 causes the rubber to expand and adhere to the valve plate 8 to complete the sealing operation. Then, during the downward movement of the rotating ring 9, it will come into contact with the limiting block 154. Since the limiting block 154 is slanted, the limiting block 154 will move laterally during the downward movement of the rotating ring 9. The limiting block 154 moves laterally and is housed inside the lifting rod 153. The lifting rod 153 is completely inserted into the limiting groove of the rotating ring 9. The limiting block 154 will be inserted into the slot of the rotating ring 9 by the influence of the spring, which will reinforce the rotating ring 9. The height of the rotating ring 9 can be adjusted by rotating the rotating rod 151, thereby adjusting the inflation collision amplitude of the inflatable sealing ring 3. Finally, when the valve plate 8 needs to be adjusted, push the push block to make the limit block 154 retract into the lifting rod 153, and then pull the turntable 4 upward. The movement of the turntable 4 can drive the transmission rod 10 to move. The transmission rod 10 moves and separates from the piston plate 13. During the separation of the transmission rod 10 and the piston plate 13, the connecting spring 12 will restore its deformation and pull the piston plate 13 upward. The upward movement of the piston plate 13 will draw the air inside the inflation sealing ring 3 back into the air box 11, so that the sealing ring of the inflation sealing ring 3 separates from the valve plate 8. Then the turntable 4 can be rotated. The turntable 4 rotates and drives the telescopic rod 5 to rotate. The rotation of the telescopic rod 5 drives the threaded sleeve 6 to rotate. Since the threaded sleeve 6 is threadedly connected to the valve stem 7 and the valve stem 7 is slidably connected to the valve body 1, the rotation of the threaded sleeve 6 will cause the valve stem 7 to move vertically. The vertical movement of the valve stem 7 can adjust the position of the valve plate 8.

[0024] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A conveying control valve for a wet concrete spraying machine, comprising a valve body (1), characterized in that: The valve body (1) is connected to two pipes (2) on both sides. The pipes (2) are connected to an inflatable sealing ring (3) on one side of the valve body (1). The inflatable sealing ring (3) consists of an outer ring and an inflatable sealing gasket. The valve body (1) is provided with a turntable (4) on the top surface. The turntable (4) is connected to a telescopic rod (5) at the bottom. The telescopic rod (5) is slidably connected to a threaded sleeve (6), and the threaded sleeve (6) is rotatably connected to the valve body (1). The threaded sleeve (6) is threadedly connected to a valve stem (7). The valve stem (7) is slidably connected to the valve body (1). A valve plate (8) is connected to the bottom of the valve stem (7). A rotating ring (9) is rotatably connected to the bottom of the turntable (4). A transmission rod (10) is connected to the bottom of the rotating ring (9). An air box (11) is connected to the inner frame of the valve body (1). A connecting spring (12) is connected to the inner side of the air box (11). A piston plate (13) is connected to the bottom end of the connecting spring (12). The air box (11) is connected to the inflation sealing ring (3) through an air pipe. Cleaning component (14), the cleaning component (14) is disposed inside the valve body (1); Limiting component (15), which is disposed on the upper inner side of valve body (1).

2. The conveying control valve of a wet concrete spraying machine according to claim 1, characterized in that: The cleaning assembly (14) has a ratchet (141) connected to the inner side of the valve body (1). The outer ring of the ratchet (141) is rotatably connected to the valve body (1) via a hollow bearing. A semi-circular protrusion is provided on the inner ring side of the ratchet (141). The transmission rod (10) has a rotating groove, and the semi-circular protrusion of the inner ring of the ratchet (141) is located in the rotating groove of the transmission rod (10). A gear (142) is connected to the top of the inner side of the valve body (1) via a hollow bearing. The gear (142) is fixedly sleeved with a reciprocating screw (143), and the reciprocating screw (143) is meshed with the outer ring of the ratchet (141). The gear (142) is also sleeved with a reciprocating block (144), and the reciprocating block (144) is connected to a cleaning rod (145). The cleaning rod (145) is slidably connected to the valve body (1). The bottom of the valve body (1) is slidably connected to a sliding rod (146), and the bottom of the sliding rod (146) is connected to a base plate (147).

3. The conveying control valve of a wet concrete spraying machine according to claim 1, characterized in that: The limiting component (15) has a rotating rod (151) rotatably connected to the outside of the valve body (1). The rotating rod (151) is connected to a one-way screw (152) through a bevel gear set at one end of the inner side of the valve body (1). The one-way screw (152) is rotatably connected to the valve body (1). A lifting rod (153) is threadedly connected to the top of the one-way screw (152). The lifting rod (153) is connected to a limiting block (154) through a spring at one end of the outer side of the valve body (1). A limiting groove is opened on the inner side of the rotating ring (9), and the size of the limiting groove is the same as that of the limiting block (154).

4. The conveying control valve of a wet concrete spraying machine according to claim 1, characterized in that: The telescopic rod (5) has a limiting protrusion on its outer side, and the limiting protrusion is slidably connected to the threaded sleeve (6).

5. The conveying control valve of a wet concrete spraying machine according to claim 1, characterized in that: A guide rod is connected above the piston plate (13), and the guide rod slides through the hole formed in the center of the connecting spring (12) and is slidably connected to the air box (11). A partition is connected to the inner side of the valve body (1), and the partition is located above the air box (11).

6. The conveying control valve of a wet concrete spraying machine according to claim 1, characterized in that: The bottom of the telescopic rod (5) is connected to a tension spring, and the bottom end of the tension spring is connected to the bottom of the threaded sleeve (6).

7. The conveying control valve of a wet concrete spraying machine according to claim 2, characterized in that: The valve body (1) has a rotating plate connected to its inner side, and the rotating plate is rotatably connected to the reciprocating screw (143).

8. The conveying control valve of a wet concrete spraying machine according to claim 2, characterized in that: The bottom of the valve body (1) is connected to a reset spring, and the bottom end of the reset spring is connected to the base plate (147). A limit rod is connected above the base plate (147), and the limit rod passes through the center hole of the reset spring and is slidably connected to the valve body (1).

9. The conveying control valve of a wet concrete spraying machine according to claim 3, characterized in that: The rotating ring (9) has a sliding connection to a push block in the limiting groove, and the push block is made of stainless steel.

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