Pneumatic vibrating device and method of using the same

Abstract

The purpose of this invention is to provide a pneumatic rapping device and its usage method to achieve rapping ash removal from a gasifier, thereby solving the problems of short service life and unstable operation of traditional rapping ash removal equipment. To achieve the above objective, the solution of this invention is to provide a pneumatic rapping device, comprising: an impact rod, a piston rod, a piston assembly, a rapping bracket, a piston sleeve, a sealing assembly, a cylinder bracket, a rapping cylinder, a spring, and a guide sleeve. The piston sleeve is nested within the rapping bracket, and the two are fixedly connected at their tails by bolts. The sealing assembly is embedded in the tail of the piston sleeve, and the cylinder bracket connects the piston sleeve to the rapping cylinder.

Description

Technical Field

[0001] The present invention relates to the field of rapping technology, and in particular to a pneumatic rapping device and a use method thereof. Background Art

[0002] In the late 1990s, dry pulverized coal gasification technology was favored by many domestic coal chemical companies because of its advantages of significantly improving coal utilization and reducing production costs. However, high-temperature gasifier water-cooled wall ash removal is a difficult issue. A large amount of dust generated by coal gasification is very easy to adhere to the water-cooled wall of the gasifier, greatly reducing the heat transfer efficiency, causing the gasifier outlet temperature to rise sharply, and even causing the entire system to automatically stop. The vibration ash removal equipment used in the dry pulverized coal gasification process is a key equipment to ensure the normal operation of the coal gasification unit. As an indispensable equipment for the normal operation of the gasifier, the vibration ash removal equipment is generally arranged at various angles around the gasifier, and it is constantly vibrated and knocked according to a regular pattern to vibrate the vibration surface, thereby playing the role of vibration ash removal and ensuring the stable operation of the gasifier.

[0003] CN202174087U, the present invention relates to a boiler ash removal device, and specifically to a pneumatic vibration dust removal device. The pneumatic vibration dust removal device comprises a box body, and a pneumatic power mechanism is arranged on the upper side of the box body, and the output end of the pneumatic power mechanism is connected to a transmission mechanism arranged on the box body, and the transmission mechanism is connected to a vibrating hammer whose hammer head vibrates up and down. The present invention utilizes a pneumatic power mechanism to replace the original motor gearbox to lift the hammer head of the vibration hammer, and the vibration force of the hammer head is changed from the original three gears of the motor transmission to any adjustment determined by the adjusting nut on the upper part of the cylinder body, and the lifting angle of the hammer head of the vibration hammer is increased from the original ninety degrees to the current one hundred and twenty degrees, thereby increasing the vibration force.

[0004] CN107363044A, relates to the technical field of vibration and cleaning auxiliary devices, and in particular to a pneumatic vibration and cleaning device, which can improve the fixing effect of two sets of fixed plates, thereby improving its reliability; and the collection box is relatively convenient to clean, thereby improving its practicality; and its two sets of fixed plates can both rotate, thereby improving its adaptability; it comprises a top plate, a bottom plate, two sets of connecting plates, two sets of fixed plates, an upper support plate, a lower support plate, a collection box, an electric cylinder and a hammering device, a leakage net is arranged on the upper support plate, a collection chamber is arranged in the collection box, and a receiving and releasing port is arranged at the top of the collection box; it also comprises two sets of fixed columns, two sets of fixed springs and two sets of fixed blocks; it also comprises two sets of pressing springs; it also comprises two sets of rotating shafts and two sets of limiting plates, the inner sides of the two sets of limiting plates are both provided with placement grooves, and the two sets of placement grooves are both provided with ball bearings, and it also comprises two sets of left pillars, two sets of left pulleys, two sets of right pillars and two sets of right pulleys.

[0005] In the above patents and the actual production process of various domestic coal gasification projects, due to the design defects of the rapping device itself, the impact rod of the rapping device does not move or the rapping cylinder operates unstably, resulting in a short service life of the rapping device, which seriously affects the long-term stable operation of the gasifier.

[0006] Therefore, it is an urgent technical problem to provide a compact pneumatic rapping device in the field of rapping technology. Summary of the invention

[0007] The object of the present invention is to provide a pneumatic rapping device and a method for using the same, so as to realize rapping ash removal of a gasifier, so as to solve the problems of short service life and unstable operation of traditional rapping ash removal equipment.

[0008] To achieve the above-mentioned purpose, the solution of the present invention is to provide a pneumatic rapping device, including: an impact rod, a piston rod, a piston assembly, a rapping bracket, a piston sleeve, a sealing assembly, a cylinder bracket, a rapping cylinder, a spring, and a guide sleeve. The piston sleeve is nested in the rapping bracket and the tail ends of the two are fixedly connected by bolts. The sealing assembly is embedded in the tail end of the piston sleeve, and the cylinder bracket connects the piston sleeve to the rapping cylinder; one end of the piston rod passes through the inner hole of the sealing assembly and extends into the cylinder bracket, and the other end passes through the piston sleeve and abuts against the tail end of the impact rod; the piston assembly is nested between the inner wall of the piston sleeve and the piston rod, and the spring abuts against the piston assembly and the inner end face of the piston sleeve respectively; the guide sleeve is located at the head of the piston sleeve, and is nested between the inner wall of the rapping bracket and the impact rod.

[0009] Furthermore, the rapping cylinder is embedded with an air-controlled valve assembly, through which the rapping action of the rapping cylinder can be controlled. A striker corresponding to the piston rod is provided in the rapping cylinder, and the air-controlled valve assembly drives the striker to move.

[0010] Furthermore, the piston assembly is provided with a piston sealing ring, a piston sealing pressure ring and a locking nut. There are two locking nuts in total and they are connected to the piston assembly through threads and abut against the piston sealing pressure ring. The other end face of the piston sealing pressure ring abuts against one end face of the piston sealing ring, and the other end face of the piston sealing ring abuts against the piston assembly.

[0011] Preferably, the piston sealing ring is composed of four sealing rings, three of which have a convex cross-section and one has a concave cross-section.

[0012] Furthermore, the sealing assembly consists of a sealing pressure ring, a sealing gasket, and a sealing pressure sleeve. The sealing pressure ring is embedded in the interior of the piston sleeve and is simultaneously sleeved on the piston rod. One end of the sealing pressure ring abuts against the piston sleeve, and the other end abuts against the sealing pressure sleeve. The sealing pressure sleeve and the piston sleeve are connected by screws, and a sealing gasket is provided between the sealing pressure sleeve and the piston sleeve.

[0013] Furthermore, five sealing structures are provided between the sealing sleeve and the piston rod. Two sealing rings are installed in the inner hole of the sealing sleeve, and two O-rings are installed in the inner hole of the sealing sleeve. A combined sealing ring is also provided between the sealing sleeve and the sealing ring, and the combined sealing ring is embedded in the sealing groove of the sealing sleeve, and the end face is against the sealing ring.

[0014] Preferably, the cross section of the sealing ring is in an "M" shape.

[0015] Preferably, the sealing gasket, the sealing ring and the sealing pressure ring are all made of graphite-reinforced polytetrafluoroethylene material.

[0016] Preferably, the combined sealing ring is composed of two sealing rings, wherein the cross section of one sealing ring is a "convex" structure, and the cross section of the other sealing ring is a "concave" structure.

[0017] Furthermore, the air-controlled valve assembly consists of a reversing valve core, a valve cage, a cylinder base, an air-controlled valve lower end cover, and an air-controlled valve upper end cover. The air-controlled valve core and the valve cage are installed together into the inner hole of the cylinder base; the air-controlled valve upper end cover and the air-controlled valve lower end cover are arranged at the two ends of the inner hole of the cylinder base, and respectively abut against the two end faces of the reversing valve core and the valve cage.

[0018] Furthermore, a handle, a limit screw and a limit washer are provided in the center hole of the lower end cover of the air-controlled valve, one end of the handle extends into the inner hole of the lower end cover of the air-controlled valve and abuts against the limit washer located in the lower end cover of the air-controlled valve; the limit screw passes through the limit washer and is connected to the internal thread of the handle, and by pressing the handle, the limit screw and the limit washer can be driven to move linearly in the inner hole of the lower end cover of the air-controlled valve until the limit screw abuts against the lower end surface of the reversing valve core.

[0019] Furthermore, the valve cage surface is provided with 5 evenly distributed through holes along the circumferential direction, the outer cylindrical surface of the valve cage is provided with 6 sealing rings, the cylinder base is provided with 4 reversing holes, and the outer surface of the reversing valve core is provided with 5 sealing rings. The above features constitute the reversing air path channel of the air-controlled valve assembly, and together realize the function of a "two-position five-way air-controlled valve".

[0020] Preferably, the four reversing holes on the cylinder base are respectively a first air exchange hole located at the lower part of one side of the cylinder base, a second air exchange hole located at the other side of the cylinder base, and a third air exchange hole and a fourth air exchange hole at both ends thereof.

[0021] Preferably, the six sealing rings on the outer cylindrical surface of the valve cage and the five sealing rings of the reversing valve core together ensure the sealing performance of the reversing gas path.

[0022] The present invention also provides a method for using the aforementioned device, including: the air-controlled valve assembly drives the striker in the rapping cylinder to impact the tail of the piston rod, and the piston rod drives the striker rod to vibrate at high frequency under the action of the piston assembly and the spring, and the striker rod is used to contact various angles around the gasifier, and continuously raps and strikes according to a regular pattern to vibrate the rapping surface, thereby achieving the effect of rapping and removing ash, thereby ensuring the stable operation of the gasifier.

[0023] Advantages of the present invention:

[0024] By adopting a structure in which an air-controlled valve assembly with a "two-position five-way" air-controlled reversing function is embedded in the rapping cylinder, the pneumatic rapping device has the characteristics of compact structure and long service life, and can meet the needs of rapping and ash removal working conditions of the gasifier. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the structure of the pneumatic rapping device.

[0026] Figure 2 It is a schematic diagram of the partial structure of the pneumatic rapping device.

[0027] Figure 3 This is a schematic diagram of the sealing component structure of the pneumatic rapping device.

[0028] Figure 4 It is a schematic diagram of the cross-sectional structure of the combined sealing ring in the sealing assembly.

[0029] Figure 5 It is a schematic diagram of the cross-sectional structure of the sealing ring in the sealing assembly.

[0030] Figure 6 This is a schematic diagram of the structure of the air-controlled valve assembly of the pneumatic rapping device.

[0031] As shown in the figure, 1. impact rod; 2. piston rod; 3. piston assembly; 4. rapping bracket; 5. piston sleeve; 6. sealing assembly; 7. cylinder bracket; 8. rapping cylinder; 9. air control valve assembly; 10. spring; 11. piston sealing ring; 12. piston sealing pressure ring; 13. locking nut; 14. guide sleeve; 6-1. sealing pressure ring; 6-2. sealing gasket; 6-3. sealing pressure sleeve; 6-4. sealing ring; 6-5. O-ring; 6-6. combined sealing ring; 9-1. reversing valve core; 9-2. valve cage; 9-3. cylinder base; 9-4. air control valve lower end cover; 9-5. handle; 9-6. limit screw; 9-7. limit washer; 9-8. air control valve upper end cover; A-first air exchange hole; B-second air exchange hole; C-third air exchange hole; D-fourth air exchange hole. DETAILED DESCRIPTION

[0032] To make the purpose, technical solution and advantages of the embodiments of the present invention more clear, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0033] like Figure 1 As shown, a pneumatic rapping device and a method of using the same include: a striking rod 1, a piston rod 2, a piston assembly 3, a rapping bracket 4, a piston sleeve 5, a sealing assembly 6, a cylinder bracket 7, a rapping cylinder 8, a spring 10, and a guide sleeve 14, wherein the piston sleeve 5 is nested in the rapping bracket 4 and the tail ends of the two are fixedly connected by bolts, the sealing assembly 6 is embedded in the tail end of the piston sleeve 5, and the cylinder bracket 7 connects the piston sleeve 5 with the rapping cylinder 8; one end of the piston rod 2 passes through the inner hole of the sealing assembly 6 and extends into the cylinder bracket 7, and the other end passes through the piston sleeve 5 and abuts against the tail end of the striking rod 1; the piston assembly 3 is nested between the inner wall of the piston sleeve 5 and the piston rod 2, and the spring 10 abuts against the inner end faces of the piston assembly 3 and the piston sleeve 5 respectively; the guide sleeve 14 is located at the head of the piston sleeve 5, and is nested between the inner wall of the rapping bracket 4 and the striking rod 1.

[0034] like Figure 2 As shown, the piston assembly 3 is provided with a piston sealing ring 11, a piston sealing pressure ring 12, and a locking nut 13. There are two locking nuts 13, which are connected to the piston assembly 3 by threads and abut against the piston sealing pressure ring 12. The other end face of the piston sealing pressure ring 12 abuts against one end face of the piston sealing ring 11, and the other end face of the piston sealing ring 11 abuts against the piston assembly 3. The piston sealing ring 11 is composed of four sealing rings 6-4. The cross-sections of three sealing rings 6-4 are "convex" structures, and the cross-section of one sealing ring 6-4 is "concave" structure.

[0035] like Figure 3 , Figure 4 and Figure 5 As shown, the sealing assembly 6 is composed of a sealing pressure ring 6-1, a sealing gasket 6-2, and a sealing pressure sleeve 6-3. The sealing pressure ring 6-1 is embedded in the interior of the piston sleeve 5 and is simultaneously sleeved on the piston rod 2. One end of the sealing pressure ring 6-1 abuts against the piston sleeve 5, and the other end abuts against the sealing pressure sleeve 6-3. The sealing pressure sleeve 6-3 and the piston sleeve 5 are connected by screws, and a sealing gasket 6-2 is provided between the sealing pressure sleeve 6-3 and the piston sleeve 5, and 5 sealing structures are provided between the sealing pressure sleeve 6-3 and the piston rod 2. Two sealing rings 6-4 are installed in the inner hole of the sealing sleeve 6-3, and two O-rings 6-5 are also installed in the inner hole of the sealing sleeve 6-3. A combined sealing ring 6-6 is also arranged between the sealing sleeve 6-3 and the sealing pressure ring 6-1. The combined sealing ring 6-6 is embedded in the sealing groove of the sealing sleeve 6-3, and the end face is against the sealing pressure ring 6-1; the cross section of the sealing ring 6-4 presents an "M" shape; the materials of the sealing gasket 6-2, the sealing ring 6-4 and the sealing pressure ring 6-1 are all graphite-reinforced polytetrafluoroethylene materials; the combined sealing ring 6-6 is composed of two sealing rings 6-4, one of which has a "convex" cross section, and the other has a "concave" cross section.

[0036] like Figure 6As shown, the rapping cylinder 8 is embedded with an air-controlled valve assembly 9, through which the rapping action of the rapping cylinder 8 can be controlled. A striker corresponding to the piston rod 2 is provided in the rapping cylinder 8, and the air-controlled valve assembly 9 drives the striker to move; the air-controlled valve assembly 9 is composed of a reversing valve core 9-1, a valve cage 9-2, a cylinder base 9-3, an air-controlled valve lower end cover 9-4, and an air-controlled valve upper end cover 9-8. The air-controlled valve core and the valve cage 9-2 are assembled together and installed into the inner hole of the cylinder base 9-3. The upper end cover 9-8 of the air control valve and the lower end cover 9-4 of the air control valve are arranged at the two ends of the inner hole of the cylinder base 9-3, respectively abutting against the two end faces of the reversing valve core 9-1 and the valve cage 9-2; a handle 9-5, a limit screw 9-6 and a limit washer 9-7 are arranged in the center hole of the lower end cover 9-4 of the air control valve, one end of the handle 9-5 extends into the inner hole of the lower end cover 9-4 of the air control valve, and abuts against the limit washer 9-7 located in the lower end cover 9-4 of the air control valve; the limit screw 9-6 passes through the limit The washer 9-7 is connected to the internal thread of the handle 9-5. By pressing the handle 9-5, it can drive the limit screw 9-6 and the limit washer 9-7 to move linearly in the inner hole of the lower end cover 9-4 of the air control valve until the limit screw 9-6 abuts against the lower end surface of the reversing valve core 9-1; the surface of the valve cage 9-2 is provided with 5 evenly distributed through holes along the circumferential direction, the outer cylindrical surface of the valve cage 9-2 is provided with 6 sealing rings, the cylinder base 9-3 is provided with 4 reversing holes, and the outer surface of the reversing valve core 9-1 is provided with 5 sealing rings The above features constitute the reversing air path of the air control valve assembly 9, and together realize the function of the "two-position five-way air control valve"; the four reversing holes on the cylinder base 9-3 are respectively the first air exchange hole A located at the lower part of one side of the cylinder base 9-3, and the second air exchange hole B located on the other side of the cylinder base 9-3, and the third air exchange hole C and the fourth air exchange hole D at both ends thereof; the six sealing rings on the outer cylindrical surface of the valve cage 9-2 and the five sealing rings of the reversing valve core 9-1 jointly ensure the sealing performance of the reversing air path.

[0037] During operation, the air-controlled valve assembly 9 drives the striker in the rapping cylinder 8 to impact the tail of the piston rod 2. The piston rod 2 drives the striker rod 1 to vibrate at high frequency under the action of the piston assembly 3 and the spring 10. The striker rod 1 contacts various angles around the gasifier, and continuously raps and strikes it in a regular pattern to vibrate the rapping surface, thereby achieving the effect of rapping and removing ash, thereby ensuring the stable operation of the gasifier.

[0038] Obviously, the described embodiments are only some embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

Claims

1. A pneumatic rapping device, characterized in that: include: A striking rod (1), a piston rod (2), a piston assembly (3), a rapping bracket (4), a piston sleeve (5), a sealing assembly (6), a cylinder bracket (7), a rapping cylinder (8), a spring (10), and a guide sleeve (14); the piston sleeve (5) is nested in the rapping bracket (4) and the two are fixedly connected at the rear ends by bolts; the sealing assembly (6) is embedded in the rear end of the piston sleeve (5); the cylinder bracket (7) connects the piston sleeve (5) and the rapping cylinder (8); the piston rod (2) is One end passes through the inner hole of the sealing assembly (6) and extends into the interior of the cylinder bracket (7), and the other end passes through the piston sleeve (5) and abuts against the tail of the impact rod (1); the piston assembly (3) is nested between the inner wall of the piston sleeve (5) and the piston rod (2), and the spring (10) abuts against the inner end surface of the piston assembly (3) and the piston sleeve (5) respectively; the guide sleeve (14) is located at the head of the piston sleeve (5) and is nested between the inner wall of the rapping bracket (4) and the impact rod (1); The rapping cylinder (8) is embedded with an air-controlled valve assembly (9), and the rapping action of the rapping cylinder (8) is controlled by the air-controlled valve assembly (9); The sealing assembly (6) is composed of a sealing pressure ring (6-1), a sealing gasket (6-2), and a sealing pressure sleeve (6-3). The sealing pressure ring (6-1) is embedded in the interior of the piston sleeve (5) and is sleeved on the piston rod (2). One end of the sealing pressure ring (6-1) abuts against the piston sleeve (5), and the other end abuts against the sealing pressure sleeve (6-3). The sealing pressure sleeve (6-3) and the piston sleeve (5) are connected by screws, and a sealing gasket (6-2) is provided between the sealing pressure sleeve (6-3) and the piston sleeve (5); Five sealing structures are provided between the sealing sleeve (6-3) and the piston rod (2), wherein two sealing rings (6-4) are installed in the inner hole of the sealing sleeve (6-3), and two O-rings (6-5) are also installed in the inner hole of the sealing sleeve (6-3). A combined sealing ring (6-6) is also provided between the sealing sleeve (6-3) and the sealing ring (6-1), and the combined sealing ring (6-6) is embedded in the sealing groove of the sealing sleeve (6-3), and the end face thereof abuts against the sealing ring (6-1).

2. A pneumatic rapping device according to claim 1, characterized in that: The piston assembly (3) is provided with a piston sealing ring (11), a piston sealing pressure ring (12), and a locking nut (13). There are two locking nuts (13) in total, which are connected to the piston assembly (3) by threads and abut against the piston sealing pressure ring (12). The other end face of the piston sealing pressure ring (12) abuts against one end face of the piston sealing ring (11), and the other end face of the piston sealing ring (11) abuts against the piston assembly (3).

3. A pneumatic rapping device according to claim 1, characterized in that: The air-controlled valve assembly (9) is composed of a reversing valve core (9-1), a valve cage (9-2), a cylinder base (9-3), a lower end cover of the air-controlled valve (9-4), and an upper end cover of the air-controlled valve (9-8); the reversing valve core (9-1) and the valve cage (9-2) are installed together in the inner hole of the cylinder base (9-3); the upper end cover (9-8) and the lower end cover (9-4) of the air-controlled valve are arranged at the two ends of the inner hole of the cylinder base (9-3), and respectively abut against the two end faces of the reversing valve core (9-1) and the valve cage (9-2).

4. A pneumatic rapping device according to claim 3, characterized in that: A handle (9-5), a limit screw (9-6) and a limit washer (9-7) are provided in the center hole of the lower end cover (9-4) of the air control valve. One end of the handle (9-5) extends into the inner hole of the lower end cover (9-4) of the air control valve and abuts against the limit washer (9-7) located in the lower end cover (9-4) of the air control valve. The limit screw (9-6) passes through the limit washer (9-7) and is connected to the inner thread of the handle (9-5). By pressing the handle (9-5), the limit screw (9-6) and the limit washer (9-7) are driven to perform linear motion in the inner hole of the lower end cover (9-4) of the air control valve until the limit screw (9-6) abuts against the lower end surface of the reversing valve core (9-1).

5. A pneumatic rapping device according to claim 4, characterized in that: The surface of the valve cage (9-2) is provided with 5 evenly distributed through holes along the circumferential direction, the outer cylindrical surface of the valve cage (9-2) is provided with 6 sealing rings, the cylinder base (9-3) is provided with 4 reversing holes, and the outer surface of the reversing valve core (9-1) is provided with 5 sealing rings.

6. A pneumatic rapping device according to claim 5, characterized in that: The four reversing holes on the cylinder base (9-3) are respectively a first air exchange hole (A) located at the lower part of one side of the cylinder base (9-3), a second air exchange hole (B) located at the other side of the cylinder base (9-3), and a third air exchange hole (C) and a fourth air exchange hole (D) at both ends thereof.

7. A method for using the pneumatic rapping device according to any one of claims 1 to 6, characterized in that: The air control valve assembly (9) drives the striker in the rapping cylinder (8) to impact the tail of the piston rod (2). Under the action of the piston assembly (3) and the spring (10), the piston rod (2) drives the striker rod (1) to vibrate at a high frequency. The striker rod (1) contacts various angles around the gasifier and continuously raps and strikes in a regular manner, causing the rapping surface to vibrate, thereby achieving the effect of rapping and removing ash, thereby ensuring the stable operation of the gasifier.

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