Self-sealing compensation type unloader for concrete spraying machine

Abstract

The invention discloses a self-sealing compensation type discharger for a concrete spraying machine. The self-sealing compensation type discharger comprises a chain transmission box, a discharger shell and a discharger blade part. The unloader blade part comprises a central shaft body and a plurality of unloader blades; the central shaft body comprises a blade driving shaft, a blade shaft and a suspension ventilation shaft; the side edge of each unloader blade is connected with a nylon support; an upper groove and a lower groove are formed in the nylon support, a nylon wear-resisting strip is arranged in the upper groove, and one side of the nylon wear-resisting strip abuts against the inner wall of the discharger shell. A center channel is formed in the center of the blade shaft, a flow guide hole is formed in the unloader blade, the bottom end of the flow guide hole extends and penetrates through the blade shaft and is communicated with the center channel, and the top end of the flow guide hole extends and penetrates through the nylon support and is communicated with the upper groove. Self-sealing compensation of the discharger is achieved, the sealing performance of the discharger is enhanced, gas leakage in pneumatic conveying is effectively prevented, uniform conveying is achieved, material blockage is prevented, and disassembly, replacement and maintenance are convenient.

Description

Technical Field

[0001] The invention relates to the technical field of concrete spraying machines, in particular to a self-sealing compensating discharger for concrete spraying machines. Background Art

[0002] The unloader, also known as a rotary feeder, star-shaped unloader valve, air shutoff, etc., is a device used to discharge materials stored in the equipment evenly. Its main function is to discharge materials from the storage container in an orderly manner within a certain period of time, prevent the entry of air or other materials, and maintain the sealing of the system. It is widely used in dust removal, metallurgy, chemical industry, steel, electric power and other industries.

[0003] During the use of existing unloaders, due to long-term operation, the star wheels and seals are prone to wear and need to be replaced frequently, otherwise it is easy to cause seal failure, resulting in material leakage or gas entering the equipment, affecting the stability of the system; and when processing materials with high viscosity or humidity, blockage is prone to occur. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides a self-sealing compensating discharger for a concrete spraying machine, which can realize self-sealing compensation of the discharger, enhance the sealing of the discharger, effectively prevent gas leakage during pneumatic conveying, realize uniform material feeding, prevent material blockage, and facilitate disassembly, replacement and maintenance.

[0005] To achieve the above object, the technical solution adopted by the present invention is: a self-sealing compensating discharger for a concrete spraying machine, comprising a chain transmission box, a discharger housing, and a discharger blade portion rotatably connected to the discharger housing;

[0006] The discharger blade portion includes a central shaft and a plurality of discharger blades;

[0007] The central shaft body comprises a blade drive shaft, a blade shaft and a suspension ventilation shaft which are coaxially connected in sequence;

[0008] One end of the blade drive shaft is connected to the blade shaft through a keyway, and the other end is connected to the hydraulic motor through a chain drive box;

[0009] A plurality of the discharger blades are fixed to the outer peripheral surface of the blade shaft; the side of each of the discharger blades away from the blade shaft is connected to a nylon support;

[0010] The upper and lower side walls of the nylon support are respectively provided with an upper groove and a lower groove, the side of the discharger blade away from the blade shaft is inserted into the lower groove, a nylon wear-resistant strip is arranged in the upper groove, one side of the nylon wear-resistant strip extends out of the upper groove and abuts against the inner wall of the discharger shell;

[0011] The blade shaft is rotatably connected to the suspension ventilation shaft, and a central channel connected to the suspension ventilation shaft is opened at the center of the blade shaft, so that the high-pressure gas introduced into the suspension ventilation shaft can enter the central channel in the blade shaft;

[0012] A guide hole is provided in the discharger blade, the bottom end of the guide hole extends through the blade shaft and communicates with the central channel, and the top end of the guide hole extends through the nylon support and communicates with the upper groove.

[0013] Furthermore, a blade blind hole is opened on the side wall of the discharger blade away from the blade shaft, and the top of the blade blind hole extends through the nylon support. A spring is arranged in the blade blind hole, the bottom end of the spring is connected to the bottom wall of the blade blind hole, and the top end of the spring passes through the nylon support and abuts against the bottom surface of the nylon wear-resistant strip.

[0014] Furthermore, two opposite inner walls of the upper groove of the nylon support are provided with sealing grooves, and sealing strips are arranged in the sealing grooves, and the sealing strips are in contact with the side walls of the nylon wear-resistant strips.

[0015] Furthermore, the width of the nylon support increases gradually in a direction approaching the inner wall of the discharger shell.

[0016] Furthermore, the discharger housing is provided with openings at both ends of the axial direction, and each opening is provided with an end cover assembly, and the end cover assembly is hingedly mounted at the openings at both ends of the discharger housing;

[0017] The end cap assembly comprises an outer end cap, a sealing cap, a nylon cap and an inner end cap;

[0018] The outer end cover, the sealing cover and the nylon cover are connected and fixed by screws, and the sealing cover is connected between the nylon cover and the outer end cover; the inner end cover is fixed to the end surface of each discharger blade by screws, rotates synchronously with the discharger blades, and the inner end cover is fitted with the side wall of the nylon cover away from the sealing cover.

[0019] Furthermore, self-disassembly hydraulic cylinders are provided on both sides of the discharger housing, and the self-disassembly hydraulic cylinders correspond one-to-one to the end cover assemblies. The piston rods of the self-disassembly hydraulic cylinders are hinged to the outer end cover, and the extension of the piston rods of the self-disassembly hydraulic cylinders can drive the end cover assembly to deflect away from the discharger housing.

[0020] Beneficial effects of the present invention:

[0021] The present invention discloses a self-sealing compensating discharger for a concrete spraying machine. A spring and compressed air are used to form an air pump device, so that a nylon wear-resistant strip floats and fits the inner wall of the discharger, thereby ensuring the fit of the inner wall and realizing self-sealing compensation of the discharger blades. This increases the sealing performance of the discharger and makes the discharger suitable for conveying materials with high sealing requirements.

[0022] The discharger blades are in elastic contact with the inner wall of the discharger through nylon wear-resistant strips, which effectively reduces the situation where the discharger is stuck and stops running due to fine sand stuck in the gap, and the working stability is higher.

[0023] The end covers at both ends of the discharger adopt a multi-cover combination design of an outer end cover, a sealing cover, a nylon cover and an inner end cover to effectively improve the opening sealing of the discharger.

[0024] The shaft of the unloader adopts a multi-axis connection form of a blade drive shaft, a blade shaft and a suspended ventilation shaft, which can simultaneously realize multiple functions such as connection, transmission, sealing and ventilation, and is convenient for replacement and disassembly.

[0025] The self-disassembling hydraulic cylinder can realize the automatic disassembly and assembly of the unloader, reducing the manual loading and unloading time and improving work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0027] Figure 2 It is a sectional view of the overall structure of the present invention.

[0028] Figure 3 It is an exploded view of the overall structure of the present invention.

[0029] Figure 4 It is a structural schematic diagram of the blade portion of the discharger in the present invention.

[0030] Figure 5 It is a schematic diagram of the structure of the discharger blades in the present invention.

[0031] Figure 6 yes Figure 5 A partial enlarged view of area A in the middle.

[0032] Figure 7 It is a cross-sectional view used to reflect the internal air passage of the discharger in the present invention.

[0033] Figure 8 It is a structural schematic diagram used to reflect the connection between the chain transmission box and the slide rail in the present invention.

[0034] In the figure: 1. chain drive box; 2. discharger housing; 3. discharger blade part; 31. central axis; 311. blade drive shaft; 312. blade shaft; 313. suspension ventilation shaft; 314. central channel; 32. discharger blade; 321. blade blind hole; 322. guide hole; 33. nylon support; 331. upper groove; 332. lower groove; 333. sealing strip; 34. nylon wear strip; 35. spring; 4. end cover assembly; 41. outer end cover; 42. sealing cover; 43. nylon cover; 44. inner end cover; 5. self-disassembling hydraulic cylinder; 51. slide rail; 52. guide rod; 53. guide block. DETAILED DESCRIPTION

[0035] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention.

[0036] The invention discloses a self-sealing compensating type discharger for a concrete spraying machine.

[0037] Reference Figures 1 to 3 A self-sealing compensating discharger for a concrete spraying machine comprises a discharger housing 2, a discharger blade portion 3 rotatably connected to the discharger housing 2, and a chain transmission box 1.

[0038] The discharger blade portion 3 includes a central axis body 31 and a plurality of discharger blades 32; the central axis body 31 includes a blade drive shaft 311, a blade shaft 312 and a suspension ventilation shaft 313 which are coaxially connected in sequence; the shaft body of the discharger is composed of a multi-axis connection, which can simultaneously realize multiple functions such as connection, transmission, sealing and ventilation, and is convenient for replacement and disassembly.

[0039] One end of the blade drive shaft 311 is connected to a sprocket through a keyway, one end of the chain transmission box 1 is connected to a hydraulic motor as the driving part of the discharger, and the other end is connected to the sprocket at the end of the blade drive shaft 311 to drive the discharger blade part 3 to rotate.

[0040] Reference Figures 4 to 7 The end of the blade drive shaft 311 away from the chain transmission box 1 is coaxially fixed with the blade shaft 312 through a keyway, and the end of the blade shaft 312 away from the blade drive shaft 311 is rotatably connected to the suspension ventilation shaft 313. A plurality of discharger blades 32 are fixed to the outer peripheral surface of the blade shaft 312; the side of each discharger blade 32 away from the blade shaft 312 is connected to a nylon support 33 by bolts, the width of the nylon support 33 increases in the direction close to the inner wall of the discharger housing 2, and the upper and lower side walls of the nylon support 33 are respectively provided with an upper groove 331 and a lower groove 332, so that the cross-sectional shape of the nylon support 33 is H-shaped, and the side of the discharger blade 32 away from the blade shaft 312 is inserted into the lower groove 332, and a nylon wear strip 34 is arranged in the upper groove 331, and the upper groove 331 extends from one side of the nylon wear strip 34, and the outer side wall of the nylon wear strip 34 away from the nylon support 33 abuts against the inner wall of the discharger housing 2. The provision of the nylon support 33 and the nylon wear-resistant strip 34 can effectively improve the wear resistance of the discharger during operation, reduce the conveying time of the discharger in conveying high-friction materials such as concrete, and improve work efficiency.

[0041] A central channel 314 connected to the suspension ventilation shaft 313 is provided at the center of the blade shaft 312, and the high-pressure gas introduced through the suspension ventilation shaft 313 can enter the central channel 314 in the blade shaft 312. A guide hole 322 is provided in the discharger blade 32, the bottom end of the guide hole 322 extends through the blade shaft 312 and communicates with the central channel 314, and the top end of the guide hole 322 extends through the nylon support 33 and communicates with the upper groove 331.

[0042] When the high-pressure gas enters the central channel 314 of the blade shaft 312 through the suspended ventilation shaft 313, and then flows to the nylon wear-resistant strip 34 in the upper groove 331 through the guide hole 322, the nylon wear-resistant strip 34 is lifted up by the high-pressure gas and fits tightly against the inner wall of the discharger, thereby achieving self-sealing compensation of the discharger and improving the sealing of the discharger; in addition, the discharger blade 32 is in elastic contact with the inner wall of the discharger through the nylon wear-resistant strip 34, which effectively reduces the situation where the discharger is stuck and stops running due to fine sand stuck in the gap, and the working stability is higher.

[0043] In order to further ensure the effect and stability of the airtight self-compensation, a blade blind hole 321 is opened on the side wall of the discharger blade 32 away from the blade shaft 312, and the top of the blade blind hole 321 extends through the nylon support 33. A spring 35 is arranged in the blade blind hole 321. The bottom end of the spring 35 is connected to the bottom wall of the blade blind hole 321. The top of the spring 35 passes through the nylon support 33 and abuts against the bottom surface of the nylon wear strip 34. The spring 35 cooperates with the high-pressure air to realize the air pump function, ensure that the nylon wear strip 34 can be close to the inner wall of the discharger, realize airtight self-compensation, ensure the fit of the inner wall, and further improve the sealing of the discharger.

[0044] Reference Figure 6 The two opposite inner walls of the upper groove 331 of the nylon support 33 are provided with sealing grooves, and a sealing strip 333 is arranged in the sealing groove. The sealing strip 333 is in contact with the side wall of the nylon wear-resistant strip 34. This design can effectively ensure the air tightness of the nylon wear-resistant strip 34 during elastic movement and prevent high-pressure gas from leaking from the gap between the nylon wear-resistant strip 34 and the nylon support 33.

[0045] Reference Figures 1 to 3The discharger housing 2 is provided with openings at both ends of the axial direction and is provided with an end cover assembly 4; the end cover assembly 4 is hingedly installed at the openings at both ends of the discharger housing 2 through a connecting rod; the end cover assembly 4 includes an outer end cover 41, a sealing cover 42, a nylon cover 43 and an inner end cover 44. Among them, the outer end cover 41, the sealing cover 42 and the nylon cover 43 are connected and fixed by screws, and the sealing cover 42 is located between the nylon cover 43 and the outer end cover 41; the inner end cover 44 is fixed to the end surface of each discharger blade 32 by screws, and rotates synchronously with the discharger blade 32, and the inner end cover 44 is in contact with the side wall of the nylon cover 43 away from the sealing cover 42. The combined design of multiple covers of the end cover assembly 4 effectively improves the sealing performance of the discharger opening.

[0046] Reference Figures 1 to 3 There are two self-disassembling hydraulic cylinders 5, which are respectively installed on both sides of the discharger housing 2. The self-disassembling hydraulic cylinders 5 correspond to the end cover assemblies 4 one by one. The piston rods of the self-disassembling hydraulic cylinders 5 are connected to the outer end cover 41. The extension of the piston rods can drive the end cover assembly 4 to deflect away from the discharger housing 2, thereby opening the openings at both ends of the discharger, which is simple and convenient, and is convenient for subsequent staff to clean the discharger or replace parts.

[0047] Reference Figure 8 In some embodiments, two slide rails 51 are provided at the bottom of the chain transmission case 1, the chain transmission case 1 is slidably connected to the slide rails 51, a guide rod 52 is fixed to the side of the chain transmission case 1 close to the discharger housing 2, and a guide block 53 for the guide rod 52 to slide through is bolted to the outer circumference of the discharger housing 2. Then, the chain transmission case 1 is easily removed to facilitate opening of the end cover assembly 4 close to the side of the chain transmission case 1.

[0048] Based on the above ideal embodiments of the present invention, the relevant staff can make various changes and modifications without departing from the technical concept of the present invention through the above description. The technical scope of the present invention is not limited to the contents of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A self-sealing compensating discharger for a concrete spraying machine, characterized in that: It comprises a chain transmission box (1), a discharger housing (2), and a discharger blade portion (3) rotatably connected to the discharger housing (2); The discharger blade portion (3) comprises a central shaft (31) and a plurality of discharger blades (32); The central shaft body (31) comprises a blade drive shaft (311), a blade shaft (312) and a suspension ventilation shaft (313) which are coaxially connected in sequence; One end of the blade drive shaft (311) is connected to the blade shaft (312) via a keyway, and the other end is connected to the hydraulic motor via a chain drive box (1); A plurality of the discharger blades (32) are fixed to the outer peripheral surface of the blade shaft (312); a nylon support (33) is connected to the side of each discharger blade (32) away from the blade shaft (312); The upper and lower side walls of the nylon support (33) are respectively provided with an upper groove (331) and a lower groove (332); the side of the discharger blade (32) away from the blade shaft (312) is inserted into the lower groove (332); a nylon wear-resistant strip (34) is provided in the upper groove (331); one side of the nylon wear-resistant strip (34) extends out of the upper groove (331) and abuts against the inner wall of the discharger housing (2); The blade shaft (312) is rotatably connected to the suspension ventilation shaft (313); a central channel (314) communicating with the suspension ventilation shaft (313) is provided at the center of the blade shaft (312); and high-pressure gas introduced into the suspension ventilation shaft (313) can then enter the central channel (314) in the blade shaft (312); A guide hole (322) is provided in the discharger blade (32), the bottom end of the guide hole (322) extends through the blade shaft (312) and communicates with the central channel (314), and the top end of the guide hole (322) extends through the nylon support (33) and communicates with the upper groove (331).

2. The self-sealing compensating discharger for a concrete spraying machine according to claim 1, characterized in that: A blade blind hole (321) is provided on the side wall of the discharger blade (32) away from the blade shaft (312), and the top end of the blade blind hole (321) extends through the nylon support (33). A spring (35) is provided in the blade blind hole (321), and the bottom end of the spring (35) is connected to the bottom wall of the blade blind hole (321). The top end of the spring (35) passes through the nylon support (33) and abuts against the bottom surface of the nylon wear-resistant strip (34).

3. The self-sealing compensating discharger for a concrete spraying machine according to claim 2, characterized in that: Two opposite inner walls of the upper groove (331) of the nylon support (33) are provided with sealing grooves, and a sealing strip (333) is arranged in the sealing groove. The sealing strip (333) is in contact with the side wall of the nylon wear-resistant strip (34).

4. The self-sealing compensating discharger for a concrete spraying machine according to claim 3, characterized in that: The width of the nylon support (33) increases gradually in a direction approaching the inner wall of the discharger housing (2).

5. A self-sealing compensating discharger for a concrete spraying machine according to any one of claims 1 to 4, characterized in that: The discharger housing (2) is provided with openings at both ends of the axial direction, and each opening is provided with an end cover assembly (4), and the end cover assembly (4) is hingedly mounted on the openings at both ends of the discharger housing (2); The end cover assembly (4) comprises an outer end cover (41), a sealing cover (42), a nylon cover (43) and an inner end cover (44); The outer end cover (41), the sealing cover (42) and the nylon cover (43) are connected and fixed by screws, and the sealing cover (42) is connected between the nylon cover (43) and the outer end cover (41); the inner end cover (44) is fixed to the end surface of each discharger blade (32) by screws, rotates synchronously with the discharger blade (32), and the inner end cover (44) is in contact with the side wall of the nylon cover (43) away from the sealing cover (42).

6. The self-sealing compensating discharger for a concrete spraying machine according to claim 5, characterized in that: Self-detachable hydraulic cylinders (5) are provided on both sides of the discharger housing (2), the self-detachable hydraulic cylinders (5) correspond to the end cover assemblies (4) one by one, the piston rods of the self-detachable hydraulic cylinders (5) are hinged to the outer end cover (41), and the extension of the piston rods of the self-detachable hydraulic cylinders (5) can drive the end cover assembly (4) to deflect in a direction away from the discharger housing (2).

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