A Dense Sand Blasting Nozzle with a Leak-Proof Structure and Its Usage Method

Abstract

The present invention discloses a dense sand jet nozzle with a leak-proof structure and a usage method, which includes a pipe body, a threaded connection pipe, a spray head and a conical block. A conical block is installed at the bottom end of the spray head. A sealing gasket is installed on the outer wall of the cross plate. A fixing block is installed on the top of the cross plate. An air pump is installed on the inner wall of the fixing block. One end of the first spring is installed with a sealing plate. By installing a sealing gasket and an air pump, the air pump pumps the air at the connection groove to the outside. At this time, the connection groove gradually becomes negative pressure. The negative pressure of the connection groove causes the cross plate to be negatively adsorbed on the sand blasting port, thus completing the sealing. When it needs to be removed, pull the handle. The handle pulls the sealing plate to move, and the movement of the sealing plate opens the opening. At this time, the connection groove is opened, and the air pressure of the connection groove returns to normal, so that the adsorption is cancelled. This structure enables the sand jet nozzle to be tightly adsorbed on the placement surface during use, avoiding the leakage of sand, and the sealing structure is simple and convenient for use.

Description

Technical Field

[0001] The present invention relates to the technical field of sand injection nozzles, and particularly to a dense sand injection nozzle with a leak-proof structure and a usage method thereof. Background Art

[0002] During the casting process, sand filling and compaction are usually required. However, for large parts, if manual sand filling and compaction are used, there will inevitably be many gaps and holes, resulting in defective cast parts and scrapping. Therefore, a molding machine needs to be used for sand filling, and during the existing sand filling, a dense sand injection nozzle is used for spraying.

[0003] The defects of the existing sand injection nozzles are as follows:

[0004] 1. Patent document CN216461619U discloses a dense sand injection nozzle for a molding machine to prevent blockage, "including: a nozzle head, a connection hole is opened inside the nozzle head, an anti-blocking ball is installed inside the connection hole, an anti-blocking chamber is opened inside the anti-blocking ball, feeding and discharging ports are opened at both ends of the anti-blocking chamber, and ventilation holes are opened on one side of the feeding and discharging ports; a rotating shaft, which is installed at both ends of the anti-blocking ball, a positioning groove is opened inside the rotating shaft, and a rotating groove is opened on the outer side of the rotating shaft. Compared with the prior art, when the material reaches the anti-blocking ball, it will enter the anti-blocking chamber from the feeding and discharging port at one end of the anti-blocking ball, and then be ejected from the feeding and discharging port on the other side through the anti-blocking chamber. When the sand injection nozzle is blocked, only by rotating the anti-blocking ball through the rotating shaft, the material blocked in the anti-blocking chamber can be shaken to loosen the material, so as to achieve the anti-blocking effect", but the sand injection nozzle has no leak-proof port structure, and there is no sealing structure between the sand injection nozzle and the spraying end. During sand injection, the gap is likely to cause sand leakage;

[0005] 2. Patent document CN216461618U discloses a dense sand injection nozzle for casting with a self-cleaning effect, "including a sand injection nozzle body, a head is arranged above the sand injection nozzle body, a fixing block is fixed at the lower end of the sand injection nozzle body, a connecting rod is connected inside the fixing block, an installation block is fixed at the end of the connecting rod, a connecting shell is arranged above the installation block, a driving motor is arranged inside the connecting shell, the output end of the driving motor is connected with a driving gear, the outer surface of the driving gear is connected with a driven gear, a transmission rod is arranged inside the driven gear, and a cleaning brush is arranged on the upper surface of the transmission rod. The dense sand injection nozzle for casting with a self-cleaning effect can drive the driven gear to rotate through the driving motor arranged inside the connecting shell, drive the transmission rod to rotate, and then drive the cleaning brush to rotate, so as to clean the discharge port, without manual cleaning, which is convenient for people to use", but after the sand injection nozzle is tightened by threads, the sand injection nozzle is likely to loosen, resulting in accidental dropping;

[0006] 3. Patent document CN215356067U discloses a leak - proof and dense sand - shooting nozzle for a molding machine, "including a mounting block, on the upper surface of which there is a connecting block; a connecting pipe arranged on one side of the mounting block; an adjusting pipe arranged at the lower end of the mounting block, with a sand - blasting pipe arranged below the interior of the adjusting pipe, and a feeding port provided at the upper end of the sand - blasting pipe; a fixing block arranged on the outer wall of the sand - blasting pipe and close to one side of the adjusting pipe, with a fixing rod sleeve provided at the lower end of the fixing block, a telescopic rod connected to the lower end of the fixing rod sleeve, an installation disk fixed to the lower end surface of the telescopic rod, and a sealing gasket connected below the installation disk; a buffer cavity opened inside the mounting block. This leak - proof and dense sand - shooting nozzle for a molding machine is provided with a buffer cavity, enabling the sand and gravel discharged by the molding machine to play a buffering role. Through the connecting pipe, compressed air can be discharged into the buffer cavity, enabling the sand and gravel to be discharged into the sand - blasting pipe for sand - blasting", but the sand - shooting nozzle is prone to jamming, affecting the sand - shooting work;

[0007] 4. Patent document CN204545320U discloses a mold for sand casting of a cold box, "at the central position of the top of the upper mold, there is a sand - shooting nozzle installed that penetrates into the upper mold and is in communication with the cavity. Inside the left part of the upper mold and the left inner part of the lower mold, there are respectively a left upper groove and a left lower groove, and a left exhaust plug is arranged in the left upper groove and the left lower groove; inside the right part of the upper mold and the right inner part of the lower mold, there are respectively a right upper groove and a right lower groove. The right upper groove and the right lower groove are communicated with each other, and the junction of the right upper groove and the right lower groove is also in communication with the left end of the cavity. Additionally, a right exhaust plug is arranged in the right upper groove and the right lower groove. Such a structure avoids the defects of the prior art, where there are often flash burrs on the surface of the sand core of the cold box, resulting in time - consuming and laborious manual mold repair and low efficiency, and reducing the number of sand - shooting nozzles will result in poor sand - shooting density effect", but the sand - shooting nozzle has no adjustment for the thickness of the sand - shooting and cannot be adjusted arbitrarily according to requirements. Summary of the Invention

[0008] The purpose of the present invention is to provide a leak - proof and dense sand - shooting nozzle and its usage method, so as to solve the technical problem in the above - mentioned background technology that the sand - shooting nozzle has no leak - proof port structure, and the sealing structure between the sand - shooting nozzle and the spraying end, and during sand - shooting, the gap is prone to sand leakage.

[0009] To achieve the above - mentioned purpose, the present invention provides the following technical solution: A leak - proof and dense sand - shooting nozzle, including a pipe body, a threaded connecting pipe, a spraying head, and a conical block. The bottom end of the pipe body is installed with a spraying head, the bottom end of the spraying head is installed with a conical block, and a horizontal plate is installed on the outer wall of the conical block;

[0010] A connection groove is formed inside the horizontal plate. A sealing gasket is installed on the outer wall of the horizontal plate. Fine holes are formed on the outer wall of the sealing gasket, and one end of each fine hole extends into the connection groove. A fixing block is installed on the top of the horizontal plate. An air pump is installed inside the fixing block. An opening is formed on the outer wall of the horizontal plate, and one side inner wall of the opening extends into the connection groove. A support plate is installed on the inner wall of the connection groove. A first spring is installed on the inner wall of the support plate. One end of the first spring is installed with a sealing plate. A handle is installed on the outer wall of the sealing plate.

[0011] Preferably, a threaded connection pipe is installed on the top of the pipe body. A groove is formed on the top of the threaded connection pipe. A first motor is installed on the inner bottom wall of the groove.

[0012] Preferably, a screw rod is installed at the output end of the first motor. A transmission plate is installed on the outer wall of the screw rod. A sliding rod is installed on the inner bottom wall of the groove, and one end of the sliding rod extends into the transmission plate.

[0013] Preferably, a pressing plate is installed on the top of the transmission plate. A rubber pad is installed on the top of the pressing plate.

[0014] Preferably, the fixing block communicates with the connection groove. The first spring pulls the sealing plate so that the sealing plate fits against the inner wall of the opening. Two groups of grooves are formed on the top of the threaded connection pipe, and the pressing plate fits with the inner walls of the grooves.

[0015] Preferably, a receiving block is installed on the outer wall of the pipe body. Injection inclined holes are formed in the inner wall of the pipe body, and one end of each inclined hole extends into the receiving block. A limiting plate is installed on the inner bottom wall of the receiving block. An adjusting plate is installed on the outer wall of the limiting plate. A second spring is installed on the outer wall of the limiting plate.

[0016] Preferably, a toothed plate is installed on the outer wall of the adjusting plate. A second motor is installed on the inner wall of the receiving block. A gear is installed at the output end of the second motor, and the gear meshes with the toothed plate.

[0017] Preferably, an annular airbag is installed on the inner wall of the spray head. An annular elastic membrane is installed at the top of the airbag. A transmission block is installed on the outer wall of the spray head. A third motor is installed on the outer wall of the transmission block. A reel is installed at the output end of the third motor. A pull rope is installed on the outer wall of the reel. A piston is installed on the inner wall of the transmission block, and the bottom end of the piston is connected to one end of the pull rope. A telescopic rod is installed on the inner bottom wall of the transmission block. A fastening plate is installed at the top of the telescopic rod. An air pipe is installed on the outer wall of the airbag, and one end of the air pipe extends into the transmission block.

[0018] Preferably, the working steps of the device are as follows:

[0019] S1. When inserting the conical block of the spray head into the part for sandblasting, the gasket of the cross plate contacts the placement surface at this time. At this time, the air pump pumps the air at the connection groove to the outside. At this time, the connection groove gradually becomes negative pressure. The negative pressure of the connection groove causes the cross plate to be negatively adsorbed on the sandblasting port, thus completing the sealing. When it needs to be removed, pull the handle. The handle pulls the sealing plate to move, and the movement of the sealing plate opens the opening. At this time, the connection groove is opened, and the air pressure in the connection groove returns to normal, so that the adsorption is cancelled. This structure enables the sand injection nozzle to be tightly adsorbed on the placement surface during use, avoiding the leakage of sand, and the sealing structure is simple and convenient for use;

[0020] S2. The threaded connecting pipe is screwed tightly on the sand outlet pipe. At this time, the first motor rotates to drive the screw to rotate. The rotation of the screw drives the transmission plate to move. The slide rod plays a supporting role in the movement of the transmission plate. The movement of the transmission plate drives the pressing plate to move. The movement of the pressing plate drives the rubber pad to move. The rubber pad presses on the sand outlet pipe, making it difficult for the threaded connecting pipe to become loose during screwing, so as to avoid the accidental dropping of the sand injection nozzle;

[0021] S3. During sandblasting, the receiving block is connected to the external air intake component, so that the gas is sprayed obliquely downward through the inclined holes. The spraying of the air flow blows the sand, so that the possibly blocked sand is dispersed, so that the sand can flow out. And the second motor rotates to drive the gear to rotate. The rotation of the gear drives the toothed plate to move. The movement of the toothed plate drives the adjusting plate to move. The movement of the adjusting plate enables the opening and closing size of the inclined holes to be adjusted, so as to change its spraying force, facilitate adjusting the clogging clearing ability according to requirements, and can also accelerate the sand spraying rate to a certain extent;

[0022] S4. The third motor rotates to drive the reel to rotate. The reel rotates to wind the pull rope. The pull rope pulls the piston to move. The piston moves to fill the gas in the transmission block into the airbag through the air pipe. The airbag gradually bulges, so that the aperture of the spray head is reduced, and the thickness of the sand sprayed by the sand injection nozzle is adjusted. The bulging of the airbag also pulls the elastic membrane, so that the sand in the pipe body enters the airbag through the elastic membrane, reducing the impact on the airbag. This structure changes the thickness of the sandblasting by the bulging degree of the airbag, enabling the sand injection nozzle to adjust the thickness of the sandblasting according to requirements.

[0023] Preferably, the following steps are further included in the step S1:

[0024] S11. The opening is located on one side of the support plate, and the support plate supports the first spring;

[0025] The following steps are further included in the step S3:

[0026] S31. The adjusting plate is elastically pressed by the second spring on the outer wall of the limiting plate, so that the outer wall of the adjusting plate fits on one side of the inclined hole. Compared with the prior art, the beneficial effects of the present invention are:

[0027] 1. The present invention is equipped with a gasket and an air pump. When the conical block of the injection head is inserted for sandblasting, at this time, the gasket of the cross plate contacts the placement surface. At this time, the air pump pumps out the air at the connection groove to the outside. At this time, the connection groove gradually forms a negative pressure, and the negative pressure of the connection groove causes the cross plate to be negatively adsorbed on the sandblasting port, thus completing the sealing. When it needs to be removed, pull the handle, and the handle pulls the sealing plate to move. The movement of the sealing plate opens the opening. At this time, the connection groove is opened, and the air pressure in the connection groove returns to normal, thereby canceling the adsorption. This structure enables the sand injection nozzle to be tightly adsorbed on the placement surface during use, avoiding the leakage of sand, and the sealing structure is simple and convenient for use;

[0028] 2. The present invention is equipped with a pressing plate and a rubber pad. The threaded connection pipe is screwed tightly on the sand outlet pipe. At this time, the first motor rotates to drive the screw to rotate, and the rotation of the screw drives the transmission plate to move. The sliding rod supports the movement of the transmission plate. The movement of the transmission plate drives the pressing plate to move, and the movement of the pressing plate drives the rubber pad to move. The rubber pad is pressed on the sand outlet pipe, making it difficult for the threaded connection pipe to become loose when tightened, thus avoiding the accidental dropping of the sand injection nozzle;

[0029] 3. The present invention is equipped with an adjusting plate and a toothed plate. During sandblasting, the receiving block is connected to the external air intake component, so that the gas is sprayed obliquely downward through the inclined holes. The spraying of the air flow blows the sand, and the possibly blocked sand is dispersed, so that the sand can flow out. Moreover, the second motor rotates to drive the gear to rotate, the rotation of the gear drives the toothed plate to move, the movement of the toothed plate drives the adjusting plate to move, and the movement of the adjusting plate adjusts the opening and closing size of the inclined holes, thereby changing the spraying force, facilitating the adjustment of the clogging removal ability according to requirements, and can also accelerate the sand spraying rate to a certain extent;

[0030] 4. The present invention is equipped with a piston and an air pipe. The third motor rotates to drive the reel to rotate, the reel rotates to wind the pull rope, the pull rope pulls the piston to move, and the piston moves to fill the gas in the transmission block into the airbag through the air pipe. The airbag gradually bulges, thereby reducing the aperture of the injection head and adjusting the thickness of the sand sprayed by the sand injection nozzle. The bulging of the airbag also pulls the elastic membrane, so that the sand in the pipe body enters the airbag through the elastic membrane, reducing the impact on the airbag. This structure changes the thickness of the sandblasting by the degree of bulging of the airbag, enabling the sand injection nozzle to adjust the thickness of the sandblasting according to requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0032] Figure 2 is a front view structure schematic diagram of the present invention;

[0033] Figure 3 Schematic diagram of the horizontal plate structure of the present invention;

[0034] Figure 4 Schematic diagram of Structure A of the present invention;

[0035] Figure 5 Schematic diagram of Structure B of the present invention;

[0036] Figure 6 Schematic diagram of the accommodation block structure of the present invention;

[0037] Figure 7 Schematic diagram of the adjusting plate structure of the present invention;

[0038] Figure 8 Schematic diagram of the spray head structure of the present invention;

[0039] Figure 9 Schematic diagram of the process structure of the present invention.

[0040] In the figure: 1, pipe body; 2, threaded connecting pipe; 3, spray head; 4, conical block; 5, horizontal plate; 6, connecting groove; 7, gasket; 8, fine hole; 9, fixing block; 10, air pump; 11, opening; 12, support plate; 13, first spring; 14, sealing plate; 15, handle; 16, groove; 17, first motor; 18, screw; 19, transmission plate; 20, slide bar; 21, pressing plate; 22, rubber pad; 23, accommodation block; 24, inclined hole; 25, limiting plate; 26, adjusting plate; 27, second spring; 28, toothed plate; 29, second motor; 30, gear; 31, airbag; 32, elastic membrane; 33, transmission block; 34, third motor; 35, reel; 36, pulling rope; 37, piston; 38, telescopic rod; 39, fastening plate; 40, air pipe. Detailed implementation manners

[0041] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0042] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "outer", "front end", "rear end", "both ends", "one end", "the other end", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0043] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0044] Please refer to Figures 1-9 , an embodiment provided by the present invention: a dense sand injection nozzle with a leak-proof structure, including a pipe body 1, a threaded connection pipe 2, a spray head 3, and a conical block 4. The bottom end of the pipe body 1 is installed with a spray head 3, the bottom end of the spray head 3 is installed with a conical block 4, a horizontal plate 5 is installed on the outer wall of the conical block 4, a connection groove 6 is opened inside the horizontal plate 5, a sealing gasket 7 is installed on the outer wall of the horizontal plate 5, fine holes 8 are opened on the outer wall of the sealing gasket 7, and one end of the fine holes 8 extends into the inside of the connection groove 6. A fixing block 9 is installed on the top of the horizontal plate 5, an air pump 10 is installed on the inner wall of the fixing block 9, an opening 11 is opened on the outer wall of the horizontal plate 5, and one side inner wall of the opening 11 extends into the inside of the connection groove 6. A support plate 12 is installed on the inner wall of the connection groove 6, a first spring 13 is installed on the inner wall of the support plate 12, one end of the first spring 13 is installed with a sealing plate 14, and a handle 15 is installed on the outer wall of the sealing plate 14. When the conical block 4 of the spray head 3 is inserted for sandblasting, at this time, the sealing gasket 7 of the horizontal plate 5 contacts the placement surface. At this time, the air pump 10 pumps the air at the connection groove 6 to the outside. At this time, the connection groove 6 gradually becomes negative pressure, and the negative pressure of the connection groove 6 causes the horizontal plate 5 to be negatively adsorbed on the sandblasting port, thereby completing the sealing. When it needs to be removed, pull the handle 15, the handle 15 pulls the sealing plate 14 to move, and the sealing plate 14 moves to open the opening 11. At this time, the connection groove 6 is opened, and the air pressure in the connection groove 6 returns to normal, so that the adsorption is cancelled. This structure enables the sand injection nozzle to be tightly adsorbed on the placement surface during use, avoiding the leakage of sand, and the sealing structure is simple and convenient for use.

[0045] At the top of the pipe body 1, a threaded connection pipe 2 is installed. At the top of the threaded connection pipe 2, a groove 16 is opened. At the inner bottom wall of the groove 16, a first motor 17 is installed. At the output end of the first motor 17, a screw rod 18 is installed. On the outer wall of the screw rod 18, a transmission plate 19 is installed. At the inner bottom wall of the groove 16, a slide rod 20 is installed, and one end of the slide rod 20 extends into the inside of the transmission plate 19. At the top of the transmission plate 19, a pressing plate 21 is installed. At the top of the pressing plate 21, a rubber pad 22 is installed. The fixed block 9 communicates with the connection groove 6. The first spring 13 pulls the sealing plate 14, so that the sealing plate 14 fits against the inner wall of the opening 11. At the top of the threaded connection pipe 2, two groups of grooves 16 are opened. The pressing plate 21 fits with the inner wall of the groove 16. The threaded connection pipe 2 is screwed onto the sand outlet pipe. At this time, the first motor 17 rotates to drive the screw rod 18 to rotate. The screw rod 18 rotates to drive the transmission plate 19 to move. The slide rod 20 plays a supporting role in the movement of the transmission plate 19. The transmission plate 19 moves to drive the pressing plate 21 to move. The pressing plate 21 moves to drive the rubber pad 22 to move. The rubber pad 22 presses against the sand outlet pipe, so that the screwing of the threaded connection pipe 2 is not easy to loosen, thus avoiding the accidental dropping of the sand injection nozzle.

[0046] On the outer wall of the pipe body 1, a receiving block 23 is installed. Inside the inner wall of the pipe body 1, a spraying inclined hole 24 is opened, and one end of the inclined hole 24 extends into the inside of the receiving block 23. At the inner bottom wall of the receiving block 23, a limiting plate 25 is installed. On the outer wall of the limiting plate 25, an adjusting plate 26 is installed. On the outer wall of the limiting plate 25, a second spring 27 is installed. On the outer wall of the adjusting plate 26, a toothed plate 28 is installed. Inside the inner wall of the receiving block 23, a second motor 29 is installed. At the output end of the second motor 29, a gear 30 is installed, and the gear 30 meshes with the toothed plate 28. During sandblasting, the receiving block 23 is connected to an external air intake component, so that the gas is sprayed obliquely downward through the inclined hole 24. The spraying of the air flow blows the sand, so that the possibly blocked sand is dispersed, so that the sand can flow out. Moreover, the second motor 29 rotates to drive the gear 30 to rotate. The gear 30 rotates to drive the toothed plate 28 to move. The toothed plate 28 moves to drive the adjusting plate 26 to move. The movement of the adjusting plate 26 adjusts the opening and closing size of the inclined hole 24, thereby changing its spraying force, facilitating the adjustment of the clogging removal ability according to requirements, and can also accelerate the sand spraying rate to a certain extent.

[0047] An annular airbag 31 is installed on the inner wall of the spray head 3. An annular elastic membrane 32 is installed at the top of the airbag 31. A transmission block 33 is installed on the outer wall of the spray head 3. A third motor 34 is installed on the outer wall of the transmission block 33. A reel 35 is installed at the output end of the third motor 34. A pull rope 36 is installed on the outer wall of the reel 35. A piston 37 is installed on the inner wall of the transmission block 33, and the bottom end of the piston 37 is connected to one end of the pull rope 36. A telescopic rod 38 is installed on the inner bottom wall of the transmission block 33. A fastening plate 39 is installed at the top of the telescopic rod 38. An air pipe 40 is installed on the outer wall of the airbag 31, and one end of the air pipe 40 extends into the interior of the transmission block 33. The rotation of the third motor 34 drives the rotation of the reel 35. The rotation of the reel 35 winds the pull rope 36. The pull rope 36 pulls the piston 37 to move. The piston 37 moves to fill the gas in the transmission block 33 into the airbag 31 through the air pipe 40. The airbag 31 gradually bulges, so that the aperture of the spray head 3 is reduced, and the thickness of the sand ejected from its sand ejection nozzle can be adjusted. The bulging of the airbag 31 also pulls the elastic membrane 32, so that the sand in the pipe body 1 enters the airbag 31 through the elastic membrane 32, reducing the impact on the airbag 31. This structure changes the thickness of the sand blasting by the bulging degree of the airbag 31, so that the sand ejection nozzle can adjust the thickness of the sand blasting according to the needs.

[0048] The working steps of this dense sand ejection nozzle are as follows:

[0049] S1. When the conical block 4 of the spray head 3 is inserted into the part to be sandblasted, at this time, the gasket 7 of the cross plate 5 contacts the placement surface. At this time, the air pump 10 pumps the air at the connection groove 6 to the outside. At this time, the connection groove 6 gradually becomes negative pressure. The negative pressure of the connection groove 6 causes the cross plate 5 to be negatively adsorbed on the sand blasting port, thus completing the sealing. When it needs to be removed, pull the handle 15. The handle 15 pulls the sealing plate 14 to move. The sealing plate 14 moves to open the opening 11. At this time, the connection groove 6 is opened, and the air pressure of the connection groove 6 returns to normal, so that the adsorption is cancelled. This structure enables the sand ejection nozzle to be tightly adsorbed on the placement surface during use, avoiding the leakage of sand, and the sealing structure is simple and convenient for use;

[0050] S2. The threaded connection pipe 2 is screwed tightly on the sand outlet pipe. At this time, the first motor 17 rotates to drive the screw 18 to rotate. The screw 18 rotates to drive the transmission plate 19 to move. The slide bar 20 supports the movement of the transmission plate 19. The transmission plate 19 moves to drive the pressing plate 21 to move. The pressing plate 21 moves to drive the rubber pad 22 to move. The rubber pad 22 presses on the sand outlet pipe, making it difficult for the threaded connection pipe 2 to become loose when screwed tightly, thus avoiding the accidental drop of the sand ejection nozzle;

[0051] S3. During sandblasting, the receiving block 23 is connected to an external air intake component, allowing gas to be sprayed obliquely downward through the inclined holes 24. The jet of the air flow blows the sand, dispersing the sand that may be blocked, so that the sand can flow out. Moreover, the second motor 29 rotates to drive the gear 30 to rotate. The rotation of the gear 30 drives the toothed plate 28 to move. The movement of the toothed plate 28 drives the adjusting plate 26 to move. The movement of the adjusting plate 26 adjusts the opening and closing size of the inclined holes 24, thereby changing its jetting force, facilitating the adjustment of the blockage clearing ability according to requirements, and accelerating the sand ejection rate to a certain extent during the movement;

[0052] S4. The third motor 34 rotates to drive the reel 35 to rotate. The rotation of the reel 35 winds the pull rope 36. The pull rope 36 pulls the piston 37 to move. The piston 37 moves to fill the gas in the transmission block 33 into the airbag 31 through the air pipe 40. The airbag 31 gradually bulges, thereby reducing the aperture of the injection head 3 and adjusting the fineness of the sand ejected from its sand injection nozzle. The bulging of the airbag 31 also pulls the elastic membrane 32, allowing the sand in the pipe body 1 to enter the airbag 31 through the elastic membrane 32, reducing the impact on the airbag 31. This structure changes the fineness of the sandblasting by the bulging degree of the airbag 31, enabling the sand injection nozzle to adjust the fineness of the sandblasting according to requirements.

[0053] In step S1, the following steps are also included:

[0054] S11. The opening 11 is located on one side of the support plate 12, and the support plate 12 supports the first spring 13;

[0055] In step S3, the following steps are also included:

[0056] S31. The adjusting plate 26 is elastically pressed by the second spring 27 on the outer wall of the limiting plate 25, so that the outer wall of the adjusting plate 26 fits against one side of the inclined hole 24.

[0057] Working principle: When the conical block 4 of the injection head 3 is inserted for sandblasting, the gasket 7 of the cross plate 5 contacts the placement surface at this time. At this time, the air pump 10 pumps the air at the connection groove 6 to the outside. At this time, the connection groove 6 gradually becomes negative pressure. The negative pressure of the connection groove 6 causes the cross plate 5 to be negatively adsorbed on the sandblasting port, thus completing the sealing. When it needs to be removed, pull the handle 15. The handle 15 pulls the sealing plate 14 to move. The movement of the sealing plate 14 opens the opening 11. At this time, the connection groove 6 is opened, and the air pressure in the connection groove 6 returns to normal, so that the adsorption is cancelled. This structure enables the sand injection nozzle to be tightly adsorbed on the placement surface during use, avoiding the leakage of sand, and the sealing structure is simple and convenient for use. The threaded connection pipe 2 is screwed tightly on the sand outlet pipe. At this time, the first motor 17 rotates to drive the screw 18 to rotate. The rotation of the screw 18 drives the transmission plate 19 to move. The slide rod 20 supports the movement of the transmission plate 19. The movement of the transmission plate 19 drives the pressing plate 21 to move. The movement of the pressing plate 21 drives the rubber pad 22 to move. The rubber pad 22 presses on the sand outlet pipe, making it difficult for the threaded connection pipe 2 to become loose during screwing, so as to avoid the accidental dropping of the sand injection nozzle. During sandblasting, the receiving block 23 is connected to the external air intake component, so that the gas is sprayed obliquely downward through the inclined holes 24. The spraying of the air flow blows the sand, so that the possibly blocked sand is dispersed, so that the sand can flow out. Moreover, the second motor 29 rotates to drive the gear 30 to rotate. The rotation of the gear 30 drives the toothed plate 28 to move. The movement of the toothed plate 28 drives the adjusting plate 26 to move. The movement of the adjusting plate 26 enables the opening and closing size of the inclined holes 24 to be adjusted, so as to change its spraying force, facilitating the adjustment of the clogging removal ability according to requirements, and can also accelerate the spraying rate of the sand to a certain extent. The third motor 34 rotates to drive the reel 35 to rotate. The reel 35 winds the pull rope 36. The pull rope 36 pulls the piston 37 to move. The piston 37 moves to fill the gas in the transmission block 33 into the airbag 31 through the air pipe 40. The airbag 31 gradually bulges, so that the aperture of the injection head 3 can be reduced, and the thickness of the sand ejected from the sand injection nozzle can be adjusted. The bulging of the airbag 31 also pulls the elastic membrane 32, so that the sand in the pipe body 1 enters the airbag 31 through the elastic membrane 32, reducing the impact on the airbag 31. This structure changes the thickness of the sandblasting by the bulging degree of the airbag 31, enabling the sand injection nozzle to adjust the thickness of the sandblasting according to requirements.

[0058] It is obvious to those skilled in the art that the present invention is not limited to the details of the above-described exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, in any aspect, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the appended claims rather than the above description. Thus, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present invention. Any reference signs in the claims should not be construed as limiting the claims concerned.

Claims

1. A compact sand-shooting nozzle with a leak-proof structure, comprising a tube body (1), a threaded connecting tube (2), a spray head (3) and a conical block (4), characterized in that: The bottom end of the tube body (1) is equipped with an injection head (3), the bottom end of the injection head (3) is equipped with a conical block (4), and the outer wall of the conical block (4) is equipped with a transverse plate (5); A connecting groove (6) is provided inside the transverse plate (5), a sealing gasket (7) is installed on the outer wall of the transverse plate (5), a fine hole (8) is provided on the outer wall of the sealing gasket (7), and one end of the fine hole (8) extends into the interior of the connecting groove (6), a fixing block (9) is installed on the top of the transverse plate (5), an air pump (10) is installed on the inner wall of the fixing block (9), an opening (11) is provided on the outer wall of the transverse plate (5), and an inner wall on one side of the opening (11) extends into the interior of the connecting groove (6), a supporting plate (12) is installed on the inner wall of the connecting groove (6), a No. 1 spring (13) is installed on the inner wall of the supporting plate (12), a sealing plate (14) is installed on one end of the No. 1 spring (13), and a handle (15) is installed on the outer wall of the sealing plate (14).

2. A dense sand-shooting nozzle with a leak-proof structure according to claim 1, characterized in that: A threaded connection pipe (2) is installed on the top of the tube body (1), a groove (16) is provided on the top of the threaded connection pipe (2), and a first motor (17) is installed on the inner bottom wall of the groove (16).

3. A compact sand-shooting nozzle with a leak-proof structure according to claim 2, characterized in that: A screw rod (18) is installed at the output end of the first motor (17), a transmission plate (19) is installed on the outer wall of the screw rod (18), a slide rod (20) is installed on the inner bottom wall of the groove (16), and one end of the slide rod (20) extends into the interior of the transmission plate (19).

4. The compact sand-shooting nozzle with a leak-proof structure according to claim 3, characterized in that: A pressing plate (21) is installed on the top of the transmission plate (19), and a rubber pad (22) is installed on the top of the pressing plate (21).

5. The compact sand-shooting nozzle with a leak-proof structure according to claim 4, characterized in that: The fixing block (9) is connected to the connecting groove (6), and the No. 1 spring (13) pulls the sealing plate (14) so ​​that the sealing plate (14) fits with the inner wall of the opening (11). Two groups of grooves (16) are formed on the top of the threaded connecting pipe (2), and the pressure plate (21) fits with the inner wall of the groove (16).

6. The compact sand-shooting nozzle with a leak-proof structure according to claim 5, characterized in that: The outer wall of the tube body (1) is provided with a receiving block (23), the inner wall of the tube body (1) is provided with an inclined injection hole (24), and one end of the inclined hole (24) extends into the interior of the receiving block (23), a limiting plate (25) is provided on the inner bottom wall of the receiving block (23), an adjusting plate (26) is provided on the outer wall of the limiting plate (25), and a No. 2 spring (27) is provided on the outer wall of the limiting plate (25).

7. The compact sand-shooting nozzle with a leak-proof structure according to claim 6, characterized in that: A toothed plate (28) is mounted on the outer wall of the adjustment plate (26), a second motor (29) is mounted on the inner wall of the accommodating block (23), a gear (30) is mounted on the output end of the second motor (29), and the gear (30) is meshed with the toothed plate (28).

8. The compact sand-shooting nozzle with a leak-proof structure according to claim 7, characterized in that: The inner wall of the injection head (3) is mounted with an annular airbag (31), the top of the airbag (31) is mounted with an annular elastic membrane (32), the outer wall of the injection head (3) is mounted with a transmission block (33), the outer wall of the transmission block (33) is mounted with a No. 3 motor (34), the output end of the No. 3 motor (34) is mounted with a reel (35), the outer wall of the reel (35) is mounted with a pull rope (36), the inner wall of the transmission block (33) is mounted with a piston (37), and the bottom end of the piston (37) is connected to one end of the pull rope (36), the inner bottom wall of the transmission block (33) is mounted with a telescopic rod (38), the top of the telescopic rod (38) is mounted with a fastening plate (39), the outer wall of the airbag (31) is mounted with an air pipe (40), and one end of the air pipe (40) extends into the interior of the transmission block (33).

9. A method for using a dense sand-shooting nozzle with a leak-proof structure, applicable to the dense sand-shooting nozzle with a leak-proof structure according to claim 8, characterized in that: The method for using the compact sand-shooting nozzle with a leak-proof structure comprises the following steps: S1. When the conical block (4) of the injection head (3) is inserted into the part for sandblasting, the sealing pad (7) of the horizontal plate (5) contacts the placement surface, and the air pump (10) extracts the air at the connection groove (6) to the outside. At this time, the connection groove (6) gradually becomes negative pressure, and the negative pressure of the connection groove (6) causes the negative pressure of the horizontal plate (5) to be adsorbed on the sandblasting port, thereby completing the sealing. When it is necessary to remove it, pull the handle (15), and the handle (15) pulls the sealing plate (14) to move, and the sealing plate (14) moves to open the opening (11), and then the connection groove (6) is opened, and the air pressure of the connection groove (6) returns to normal, thereby canceling the adsorption. This structure allows the sandblasting nozzle to be tightly adsorbed on the placement surface when in use, thereby avoiding the leakage of sand, and the sealing structure is simple and convenient, and easy to use; S2, the threaded connection pipe (2) is screwed onto the sand outlet pipe, and at this time, the No. 1 motor (17) rotates to drive the screw rod (18) to rotate, and the screw rod (18) rotates to drive the transmission plate (19) to move, and the slide bar (20) supports the movement of the transmission plate (19), and the movement of the transmission plate (19) drives the pressure plate (21) to move, and the movement of the pressure plate (21) drives the rubber pad (22) to move, and the rubber pad (22) is pressed on the sand outlet pipe, so that the threaded connection pipe (2) is not easy to loosen, thereby preventing the sand nozzle from accidentally falling off; S3. During sandblasting, the receiving block (23) is connected to an external air intake assembly so that the gas is sprayed downwardly through the inclined hole (24). The spraying of the airflow causes the sand to be blown by the airflow, so that the sand that may be blocked is blown away, thereby allowing the sand to flow out and be sprayed out. The second motor (29) rotates to drive the gear (30) to rotate, and the gear (30) rotates to drive the tooth plate (28) to move. The movement of the tooth plate (28) drives the adjustment plate (26) to move. The movement of the adjustment plate (26) allows the opening and closing size of the inclined hole (24) to be adjusted, thereby changing its spraying strength, making it easier to adjust the clearing capacity according to needs, and can accelerate the sand spraying rate in terms of the degree of movement; S4, the third motor (34) rotates to drive the reel (35) to rotate, the reel (35) rotates to wind the pull rope (36), the pull rope (36) pulls the piston (37) to move, the piston (37) moves to fill the gas in the transmission block (33) into the air bag (31) through the air pipe (40), the air bag (31) gradually swells, so that the aperture of the injection head (3) can be reduced, so that the coarseness and fineness of the sand ejected from the sand ejecting nozzle can be adjusted, the swelling of the air bag (31) also pulls the elastic membrane (32), so that the sand in the tube body (1) passes through the elastic membrane (32) and enters the air bag (31), reducing the impact on the air bag (31). This structure changes the coarseness and fineness of the sand blasting through the swelling degree of the air bag (31), so that the sand ejecting nozzle can adjust the coarseness and fineness of the sand blasting according to demand.

10. The method for using the compact sand-shooting nozzle with a leak-proof structure according to claim 9, characterized in that: The step S1 also includes the following steps: S11, the opening (11) is located on one side of the support plate (12), and the support plate (12) supports the first spring (13); The step S3 also includes the following steps: S31, the regulating plate (26) is pressed by the second spring (27) on the outer wall of the limiting plate (25), so that the outer wall of the regulating plate (26) is attached to one side of the inclined hole (24).

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