A self-sealing compensation type discharge device for a concrete shotcreting machine

Abstract

The present invention discloses a self-sealing compensation type discharge device for a concrete shotcreting machine, which comprises a chain transmission box, a discharge device housing and a discharge device blade part; the discharge device blade part comprises a central shaft body and a plurality of discharge device blades; the central shaft body comprises a blade drive shaft, a blade shaft and a suspension ventilation shaft; nylon supports are connected to the sides of the respective discharge device blades; upper grooves and lower grooves are formed in the nylon supports, nylon wear-resistant strips are arranged in the upper grooves, and one side of the nylon wear-resistant strips abuts against the inner wall of the discharge device housing; a central channel is formed in the center of the blade shaft, diversion holes are formed in the discharge device blades, the bottom ends of the diversion holes extend through the blade shaft and are communicated with the central channel, and the top ends of the diversion holes extend through the nylon supports and are communicated with the upper grooves. The present invention realizes the self-sealing compensation of the discharge device, enhances the sealing performance of the discharge device, effectively prevents the leakage of gas in pneumatic conveying, realizes uniform material feeding, prevents material blockage, and is convenient for disassembly, replacement and maintenance.

Description

Technical Field

[0001] The present invention relates to the technical field of concrete shotcreters, and particularly to a self-sealing compensation type discharge device for a concrete shotcreter. Background Art

[0002] A discharge device, also known as a rotary feeder, star discharge valve, air lock, etc., is a device used to evenly discharge the materials stored in the equipment. Its main function is to orderly discharge the materials from the storage container within a certain time, prevent the entry of air or other materials, and maintain the tightness of the system. It is widely used in industries such as dust removal, metallurgy, chemical industry, iron and steel, and electric power.

[0003] During the use of the existing discharge device, due to long-term operation, its star wheel and sealing parts are prone to wear and need to be frequently replaced. Otherwise, it is easy to cause sealing failure, resulting in material leakage or gas entry into the equipment, affecting the system stability; and when dealing with sticky or highly humid materials, blockage is likely to occur. Summary of the Invention

[0004] In order to solve the above technical problems, the present invention provides a self-sealing compensation type discharge device for a concrete shotcreter, which can achieve self-sealing compensation of the discharge device, enhance the tightness of the discharge device, effectively prevent gas leakage in pneumatic conveying, achieve uniform material feeding, prevent material blockage, and is convenient for disassembly, replacement and maintenance.

[0005] To achieve the above object, the technical solution adopted by the present invention is: a self-sealing compensation type discharge device for a concrete shotcreter, including a chain drive box, a discharge device housing, and a discharge device blade part rotatably connected in the discharge device housing;

[0006] The discharge device blade part includes a central shaft body and a plurality of discharge device blades;

[0007] The central shaft body includes a blade drive shaft, a blade shaft, and a floating ventilation shaft that are coaxially and sequentially connected;

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

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

[0010] Upper and lower grooves are respectively formed on the upper and lower side walls of the nylon support. The side of the discharge device blade away from the blade shaft is inserted into the lower groove, a nylon wear-resistant strip is arranged in the upper groove, and one side of the nylon wear-resistant strip extends out of the upper groove and abuts against the inner wall of the discharge device housing;

[0011] The blade shaft is rotationally connected to the suspension ventilation shaft. A central channel communicating with the suspension ventilation shaft is provided in the center of the blade shaft. Thus, the high-pressure gas introduced into the suspension ventilation shaft can enter the central channel in the blade shaft.

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

[0013] Furthermore, a blade blind hole is provided on the side wall of the discharge device blade away from the blade shaft, and the top end 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, sealing grooves are provided on the opposite inner walls of the upper groove of the nylon support, sealing strips are arranged in the sealing grooves, and the sealing strips are attached to the side wall of the nylon wear-resistant strip.

[0015] Furthermore, the width of the nylon support increases in the direction close to the inner wall of the discharge device housing.

[0016] Furthermore, both axial ends of the discharge device housing are open, and end cover assemblies are provided at each opening. The end cover assemblies are hingedly installed at the two openings at both ends of the discharge device housing.

[0017] The end cover assembly includes an outer end cover, a sealing cover, a nylon cover, and an inner end cover.

[0018] The outer end cover, the sealing cover, and the nylon cover are fixedly connected 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 face of each discharge device blade by screws and rotates synchronously with the discharge device blade. The inner end cover abuts against the side wall of the nylon cover away from the sealing cover.

[0019] Furthermore, self-dismounting hydraulic cylinders are arranged on both sides of the discharge device housing. The self-dismounting hydraulic cylinders correspond to the end cover assemblies one by one. The piston rod of the self-dismounting hydraulic cylinder is hinged to the outer end cover, and when the piston rod of the self-dismounting hydraulic cylinder extends, it can drive the end cover assembly to deflect away from the discharge device housing.

[0020] The beneficial effects of the present invention:

[0021] A self-sealing compensation type discharge device for a concrete shotcreting machine of the present invention utilizes a gas pump device composed of a spring and compressed air, so that the nylon wear-resistant strip floats and fits against the inner wall of the discharge device, ensuring the inner wall fitting degree, realizing the self-sealing compensation of the discharge device blade, increasing the sealing performance of the discharge device, and making it suitable for transporting materials with high sealing requirements.

[0022] The blades of the unloader are elastically in contact with the inner wall of the unloader through nylon wear-resistant strips, effectively reducing the situation that the unloader is stuck and stops running due to fine sand getting stuck in the gap, and the working stability is higher.

[0023] The end covers at both ends of the unloader adopt a combined design of multiple covers, including an outer end cover, a sealing cover, a nylon cover, and an inner end cover, effectively improving the opening sealing performance of the unloader.

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

[0025] The self-dismantling hydraulic cylinder can realize the automatic disassembly and assembly of the unloader, reduce the manual loading and unloading time, and improve the work efficiency. Brief Description of the Drawings

[0026] Figure 1 is the overall structural schematic diagram of the present invention.

[0027] Figure 2 is the overall structural sectional view of the present invention.

[0028] Figure 3 is the overall structural explosion diagram of the present invention.

[0029] Figure 4 is the structural schematic diagram of the unloader blade part in the present invention.

[0030] Figure 5 is the structural schematic diagram for showing the unloader blade in the present invention.

[0031] Figure 6 is Figure 5 the partial enlarged view of part A in

[0032] Figure 7 is the sectional view for showing the internal air passage of the unloader in the present invention.

[0033] Figure 8 is the structural schematic diagram for showing the connection between the chain transmission box and the slide rail in the present invention.

[0034] In the figure: 1. Chain transmission box; 2. Unloader housing; 3. Unloader blade part; 31. Central shaft body; 311. Blade drive shaft; 312. Blade shaft; 313. Floating ventilation shaft; 314. Central channel; 32. Unloader blade; 321. Blade blind hole; 322. Diversion hole; 33. Nylon support; 331. Upper groove; 332. Lower groove; 333. Sealing strip; 34. Nylon wear-resistant strip; 35. Spring; 4. End cover assembly; 41. Outer end cover; 42. Sealing cover; 43. Nylon cover; 44. Inner end cover; 5. Self-dismantling hydraulic cylinder; 51. Slide rail; 52. Guide rod; 53. Guide block. Detailed implementation mode

[0035] Now, the present invention will be further described in detail with reference to the accompanying drawings. These drawings are all simplified schematic diagrams, only illustrating the basic structure of the present invention in a schematic manner, so they only show the components related to the present invention.

[0036] The present invention discloses a self-sealing compensation type discharging device for a concrete spraying machine.

[0037] Refer to Figures 1 to 3 , a self-sealing compensation type discharging device for a concrete spraying machine includes a discharging device housing 2, a discharging device blade part 3 rotatably connected in the discharging device housing 2, and a chain transmission box 1.

[0038] The discharging device blade part 3 includes a central shaft body 31 and a plurality of discharging device blades 32; the central shaft body 31 includes a blade driving shaft 311, a blade shaft 312, and a suspension ventilation shaft 313 that are coaxially and sequentially connected; the shaft body of this discharging device is composed of multiple shaft connections, 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 driving shaft 311 is connected with a sprocket through a keyway. One end of the chain transmission box 1 is connected with a hydraulic motor as the driving part of the discharging device, and the other end is connected with the sprocket at the end of the blade driving shaft 311 to drive the discharging device blade part 3 to rotate.

[0040] Refer to Figures 4 to 7 , the end of the blade driving 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 driving shaft 311 is rotatably connected with the suspension ventilation shaft 313. A plurality of discharging device blades 32 are fixed on the outer peripheral surface of the blade shaft 312; the side of each discharging device blade 32 away from the blade shaft 312 is connected with a nylon support 33 through bolts. The width of the nylon support 33 increases in the direction close to the inner wall of the discharging device housing 2. Upper grooves 331 and lower grooves 332 are respectively opened on the upper and lower side walls of the nylon support 33, so that the cross-sectional shape of the nylon support 33 is in an H shape. The side of the discharging device blade 32 away from the blade shaft 312 is inserted into the lower groove 332, and a nylon wear-resistant strip 34 is arranged in the upper groove 331, and one side of the nylon wear-resistant strip 34 extends out of the upper groove 331. The outer side wall of the nylon wear-resistant strip 34 away from the nylon support 33 abuts against the inner wall of the discharging device housing 2. The setting of the nylon support 33 and the nylon wear-resistant strip 34 can effectively improve the wear resistance during the operation of the discharging device, reduce the conveying time of the discharging device when conveying high-friction type materials such as concrete, and improve work efficiency.

[0041] A central channel 314 communicating with the suspension ventilation shaft 313 is provided in the center of the blade shaft 312, and then the high-pressure gas introduced through the suspension ventilation shaft 313 can enter the central channel 314 inside the blade shaft 312. A diversion hole 322 is provided in the discharge device blade 32. The bottom end of the diversion hole 322 extends through the blade shaft 312 and communicates with the central channel 314, and the top end of the diversion 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 suspension ventilation shaft 313, and then the high-pressure gas flows through the diversion hole 322 into the nylon wear-resistant strip 34 in the upper groove 331. The nylon wear-resistant strip 34 is lifted under the action of the high-pressure gas and clings to the inner wall of the discharge device, thereby realizing the self-sealing compensation of the discharge device and increasing the sealing performance of the discharge device. In addition, the discharge device blade 32 is elastically in contact with the inner wall of the discharge device through the nylon wear-resistant strip 34, effectively reducing the situation that the discharge device 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 airtightness self-compensation, a blade blind hole 321 is provided on the side wall of the discharge device 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. The bottom end of the spring 35 is connected to the bottom wall of the blade blind hole 321, and 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. The spring 35 cooperates with the high-pressure air to realize the air pump function, ensuring that the nylon wear-resistant strip 34 can cling to the inner wall of the discharge device, realizing the airtightness self-supplementation, ensuring the inner wall fitting degree, and further improving the sealing performance of the discharge device.

[0044] Refer to Figure 6 As shown, sealing grooves are provided on the opposite inner walls of the upper groove 331 of the nylon support 33, and sealing strips 333 are provided in the sealing grooves. The sealing strips 333 are attached to the side walls of the nylon wear-resistant strip 34. This design can effectively ensure the airtightness of the nylon wear-resistant strip 34 during elastic movement and prevent the high-pressure gas from leaking from the gap between the nylon wear-resistant strip 34 and the nylon support 33.

[0045] Refer to Figures 1 to 3, the discharge device housing 2 is open at both axial ends and is provided with end cover assemblies 4; the end cover assemblies 4 are hinged and installed at the openings at both ends of the discharge device housing 2 through connecting rods; the end cover assemblies 4 include outer end covers 41, sealing covers 42, nylon covers 43 and inner end covers 44. Among them, the outer end covers 41, sealing covers 42 and nylon covers 43 are fixedly connected by screws, and the sealing covers 42 are located between the nylon covers 43 and the outer end covers 41; the inner end covers 44 are fixed to the end faces of the discharge device blades 32 by screws, rotate synchronously with the discharge device blades 32, and the inner end covers 44 are attached to the side walls of the nylon covers 43 away from the sealing covers 42. The combined design of multiple covers of the end cover assembly 4 effectively improves the opening sealing performance of the discharge device.

[0046] Referring to Figures 1 to 3 , there are two self-dismantling hydraulic cylinders 5, and the two self-dismantling hydraulic cylinders 5 are respectively installed on both sides of the discharge device housing 2. The self-dismantling hydraulic cylinders 5 correspond to the end cover assemblies 4 one by one. The piston rods of the self-dismantling hydraulic cylinders 5 are connected to the outer end covers 41. When the piston rods extend, they can drive the end cover assemblies 4 to deflect away from the discharge device housing 2, thereby opening the openings at both ends of the discharge device, which is simple and convenient, and facilitates subsequent operations such as cleaning the discharge device or replacing parts by the staff.

[0047] Referring to Figure 8 , in some embodiments, two slide rails 51 are provided at the bottom of the chain transmission box 1. The chain transmission box 1 is slidably connected to the slide rails 51. A guide rod 52 is fixed to one side of the chain transmission box 1 close to the discharge device housing 2. A guide block 53 for the guide rod 52 to slide through is fixedly bolted on the outer peripheral surface of the discharge device housing 2. Then it is convenient to move the chain transmission box 1 away to facilitate opening the end cover assembly 4 on the side close to the chain transmission box 1.

[0048] Enlightened by the above ideal embodiments according to the present invention, through the above description, relevant staff can completely make various changes and modifications without departing from the technical idea of this invention. The technical scope of this invention is not limited to the content in 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); 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), the bottom end of the spring (35) is connected to the bottom wall of the blade blind hole (321), and 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); 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, and the sealing strip (333) is in contact with the side wall of the nylon wear-resistant strip (34); The width of the nylon support (33) increases gradually in a direction close to the inner wall of the discharger housing (2); 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).

2. The self-sealing compensating discharger for a concrete spraying machine according to claim 1, 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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