Air cannon

Abstract

The utility model relates to the technical field of arch breaking and unblocking of material warehouses and pipelines, in particular to an air cannon. Comprising a gas storage tank, one end of the gas storage tank fixedly communicates with a gas inlet pipe, one side of the gas storage tank fixedly communicates with a neck pipe, an exhaust pipe is fixed to the gas storage tank, one end of the exhaust pipe is located in the neck pipe, one end of the neck pipe is detachably, fixedly and hermetically connected with a sealing ring, and a center hole of the sealing ring communicates with an exhaust valve; a piston sleeve is elastically and slidably connected into the fixing sleeve in a sealed mode, a flow limiting hole is formed in the fixing sleeve, a lantern ring is fixedly arranged at one end of the exhaust pipe in the neck pipe in a sleeved mode, the end, opposite to the piston sleeve, of the lantern ring is inserted into an annular groove of the piston sleeve, sealing rings are fixedly and hermetically connected to the groove walls of the annular groove on the inner side and the outer side of the lantern ring, and a sliding ring is elastically and slidably connected into the annular groove. When the lantern ring retreats from the annular groove, the sliding ring is in close contact with the sealing ring under the action of the second spring, the sealing ring is prevented from being directly impacted by high-speed airflow, and abrasion under the high-temperature / high-pressure working condition is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of arch breaking, plugging technology field of storehouse, pipeline, specifically to a kind of air cannon. BACKGROUND

[0002] Air cannon is widely used in coal mine, cement plant, power plant, mine and other plants and mines with silo and hopper conveying pipeline, replace artificial explosive blasting, mechanical vibration and some effect poor, unsafe dredging method.Air cannon is a kind of environmental protection safe arch breaking and flow-aiding plugging special equipment.

[0003] The patent document with the announcement number CN212510460U discloses a kind of high-temperature air cannon, including gas storage tank, gas storage tank is fixed with the gas inlet pipe communicated with it, gas storage tank is fixed with the neck pipe communicated with it, exhaust pipe is through gas storage tank and extends to the neck pipe, exhaust pipe is fixed and sealed with gas storage tank, flange ring is fixed in the end of neck pipe, flange ring is fixed and sealed with the sealing plate, elastic membrane bowl is fixed between flange ring and sealing plate, elastic membrane bowl seals the one end of exhaust pipe in neck pipe, quick exhaust valve is fixed on sealing plate, quick exhaust valve is communicated with the space between elastic membrane bowl and sealing plate, the elastic membrane bowl includes outer ring, taper ring is arranged in the inside of outer ring, the taper ring is inclined along the direction of exhaust pipe end in, sealing piece is fixed in the taper ring, sealing piece seals the one end of exhaust pipe in neck pipe, flow limiting hole is opened in the taper ring, multiple vertical insertion rods are fixed on the right end of sealing piece, sleeve pipe corresponding with insertion rod is fixed on the left end of sealing plate, insertion rod extends into sleeve pipe and is slidably connected with it.But in the process of quick exhaust, high-speed airflow is prone to cause sealing gasket damage, thereby reducing its service life, maintenance frequency is high. UTILITY MODEL CONTENT

[0004] The main purpose of the utility model is to provide an air cannon capable of improving service life and reducing maintenance frequency.

[0005] To achieve the above purpose, the technical scheme provided by the utility model is:

[0006] The utility model provides an air cannon, including the air tank, one end fixed communication has the air inlet pipe of air tank, one side fixed communication has the neck pipe of air tank, is fixed with the exhaust pipe on the air tank, exhaust pipe penetrates air tank, exhaust pipe one end is located in the neck pipe, one end detachable fixed seal connection has the ring of neck pipe, ring center hole is connected with exhaust valve, is arranged in the fixed sleeve of neck pipe, fixed sleeve is fixedly connected with ring, the elastic sliding seal connection has the piston sleeve in fixed sleeve, is seted up in the flow limiting hole of fixed sleeve, the cavity between neck pipe and fixed sleeve with the cavity between piston sleeve and ring is connected through the flow limiting hole, piston sleeve one end seals the exhaust pipe in the neck pipe, piston sleeve one end is equipped with the ring of fixed sleeve in the exhaust pipe of neck pipe, the end of opposite of ring is inserted in the ring groove of piston sleeve in the ring groove of ring, both sides of ring groove wall are fixedly connected with the sealing ring of ring groove, sealing ring and ring sealed contact, the elastic sliding connection has the sliding ring in ring groove, when ring is taken out from ring groove, the inner edge and the outer edge of sliding ring can be sealed contact with two sealing rings respectively.

[0007] Specifically, the piston sleeve and the ring are connected through a first spring.

[0008] Specifically, the sliding ring and the piston sleeve are connected through a second spring.

[0009] Specifically, the elastic force of the second spring is less than the elastic force of the first spring.

[0010] Specifically, the one end of the exhaust pipe in the neck pipe is processed with a taper surface, and the one end of the piston sleeve towards the exhaust pipe is fixed with a taper block, and the taper block is in sealing contact with the taper surface.

[0011] Specifically, the sealing ring is a high-temperature-resistant sealing ring.

[0012] Specifically, the ring and the neck pipe are threadedly and sealingly connected.

[0013] Compared with the prior art, the utility model has the beneficial effects that:

[0014] 1. When the ring is taken out from the ring groove, the sliding ring is in close contact with the sealing ring under the action of the second spring, so that the high-speed airflow directly impacting the sealing ring is avoided, and the wear under high-temperature / high-pressure working conditions is reduced.

[0015] 2. Through the difference in elastic force of the first spring and the second spring, the displacement control of the piston sleeve triggered by pressure difference is realized, and the quick switching of the sealing state of the exhaust pipe and the starting operation is ensured.

[0016] 3. Through the cooperation of the taper block on the piston sleeve and the taper surface of the exhaust pipe, the sealing performance is further improved, and the leakage of compressed air is prevented.

[0017] 4. The ring and the neck pipe are detachably threadedly and sealingly connected, so that the internal components are convenient to disassemble, maintain or replace, the maintenance cost is reduced, the elastic sliding sealing structure of the fixed sleeve and the piston sleeve simplifies the assembly process, and the maintainability of the equipment is improved.

[0018] 5. The collar and ring groove insertion structure, combined with double sealing rings, forms a multi-level sealing defense, improving reliability. Attached Figure Description

[0019] Figure 1 This is a partial sectional view of the present invention.

[0020] Figure 2 for Figure 1 A magnified view of region A in the middle.

[0021] Figure 3 for Figure 2 A magnified view of region B in the middle.

[0022] The components in the attached diagram are named as follows: 1. Gas tank, 2. Exhaust pipe, 3. Neck pipe, 4. Sealing ring, 5. Fixing sleeve, 6. Flow limiting hole, 7. Piston sleeve, 8. First spring, 9. Inlet pipe, 10. Exhaust valve, 11. Cone block, 12. Collar, 13. Sealing ring, 14. Ring groove, 15. Slip ring, 16. Second spring. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0024] Example 1: Refer to Figures 1-3 As shown, an air cannon includes an air tank 1, with an air inlet pipe 9 fixedly connected to one end of the air tank 1, and a neck pipe 3 fixedly connected to one side of the air tank 1. An exhaust pipe 2 is fixedly attached to the air tank (1), penetrating the air tank 1. One end of the exhaust pipe 2 is located inside the neck pipe 3, and a sealing ring 4 is detachably and fixedly sealed to one end of the neck pipe 3. Specifically, the sealing ring 4 is threadedly sealed to the neck pipe 3.

[0025] The central hole of the sealing ring 4 is connected to the exhaust valve 10. A fixed sleeve 5 is provided inside the neck tube 3, and the fixed sleeve 5 is fixedly connected to the sealing ring 4. A piston sleeve 7 is elastically and slidably connected inside the fixed sleeve 5, and the piston sleeve 7 is connected to the sealing ring 4 by a first spring 8. A flow-limiting hole 6 is provided on the fixed sleeve 5, and the cavity between the neck tube 3 and the fixed sleeve 5 is connected to the cavity between the piston sleeve 7 and the sealing ring 4 through the flow-limiting hole 6.

[0026] The piston sleeve 7 seals the one end of the exhaust pipe 2 in the neck pipe 3, the one end of the exhaust pipe 2 in the neck pipe 3 is fixedly sleeved with the collar 12, the end of the collar 12 opposite to the piston sleeve 7 is inserted into the ring groove 14 of the piston sleeve 7, the ring groove 14 on the inner and outer sides of the collar 12 is fixedly connected with the sealing rings 13 in sealing mode, the sealing rings 13 are in sealing contact with the collar 12, the ring groove 14 is elastically and slidably connected with the sliding ring 15, and the sliding ring 15 is connected with the piston sleeve 7 through the second spring 16. The elastic force of the second spring 16 is smaller than that of the first spring 8. When the collar 12 is withdrawn from the ring groove 14, the inner and outer edges of the sliding ring 15 can be in sealing contact with the two sealing rings 13 respectively. The sealing ring 13 is a high-temperature-resistant sealing ring.

[0027] In use, the compressed air enters into the gas tank 1 through the air inlet pipe 9, the cavities between the neck pipe 3 and the fixed sleeve 5 and between the piston sleeve 7 and the sealing ring 4 are communicated through the flow limiting hole 6, at this time, the pressures of the cavities in the gas tank 1, between the neck pipe 3 and the fixed sleeve 5 and between the piston sleeve 7 and the sealing ring 4 are equal, under the elastic force of the first spring 8, the piston sleeve 7 abuts against the exhaust pipe 2, the collar 12 is inserted into the ring groove 14 and is in sealing contact with the sealing ring 13, the collar 12 abuts against the sliding ring 15, and the second spring 16 is compressed.

[0028] When the exhaust valve 10 is opened, the compressed air in the cavity between the piston sleeve 7 and the sealing ring 4 is rapidly discharged, the pressure in the cavity between the piston sleeve 7 and the sealing ring 4 is rapidly reduced, the compressed air in the cavity between the neck pipe 3 and the fixed sleeve 5 cannot enter into the cavity between the piston sleeve 7 and the sealing ring 4 in time under the flow limiting effect of the flow limiting hole 6, in this process, the pressure difference between the cavities between the neck pipe 3 and the fixed sleeve 5 and between the piston sleeve 7 and the sealing ring 4 is generated, at this time, under the action of the pressure in the cavity between the neck pipe 3 and the fixed sleeve 5, the piston sleeve 7 compresses the first spring 8 and moves away from the exhaust pipe 2, when the collar 12 is withdrawn from the ring groove 14, the air pressure in the gas tank 1 can be converted into air jet power and is discharged from the exhaust pipe 2, so that the strong impact force is generated.

[0029] After the compressed air in the gas tank 1 is discharged from the exhaust pipe 2, the piston sleeve 7 is restored under the elastic force of the first spring 8, the collar 12 is inserted into the ring groove 14 again and abuts against the sliding ring 15, the exhaust pipe 2 is blocked, with the compressed air continuously entering into the gas tank 1, the compressed air enters into the cavity between the piston sleeve 7 and the sealing ring 4 through the flow limiting hole 6, so that the pressures of the cavities in the gas tank 1, between the neck pipe 3 and the fixed sleeve 5 and between the piston sleeve 7 and the sealing ring 4 are balanced, and the preparation for the next start is made.

[0030] When the collar 12 is out of the ring groove 14, the inner edge and the outer edge of the slip ring 15 can be in sealing contact with the two sealing rings 13 respectively under the elastic force of the second spring 16, the high-speed airflow discharged through the exhaust pipe 2 can be prevented from damaging the sealing rings 13, the sealing rings 13 can be effectively protected, and the service life of the sealing rings 13 is improved.

[0031] Through the elastic force difference design of the first spring 8 and the second spring 16, differential pressure triggered displacement control of the piston sleeve 7 is realized, and the quick switching of the sealing state and the opening state of the exhaust pipe 2 is ensured.

[0032] Embodiment two: on the basis of embodiment one, referring to Figures 1-3 As shown in the figure, one end of the exhaust pipe 2 in the neck pipe 3 is processed with a taper surface, and the piston sleeve 7 is fixed with a taper block 11 at the end facing the exhaust pipe 2, and the taper block 11 is in sealing contact with the taper surface.

[0033] When the exhaust pipe 2 is in contact with the piston sleeve 7, the taper block 11 can be in sealing contact with the taper surface, and the sealing performance of the exhaust pipe 2 can be further improved.

[0034] The above only describes the preferred embodiments of the utility model, and does not limit the utility model, and any modification, equivalent replacement and improvement within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. An air cannon comprising a gas storage tank (1), one end of which is fixedly connected with an air inlet pipe (9), one side of which is fixedly connected with a neck pipe (3), and on which a gas outlet pipe (2) is fixed, the gas outlet pipe (2) penetrating through the gas storage tank (1), one end of the gas outlet pipe (2) being located in the neck pipe (3), characterized in that, The neck pipe (3) is detachably fixedly connected with a sealing ring (4) at one end, the center hole of the sealing ring (4) is communicated with an exhaust valve (10), a fixed sleeve (5) is arranged in the neck pipe (3), the fixed sleeve (5) is fixedly connected with the sealing ring (4), an elastic piston sleeve (7) is elastically and sealingly connected in the fixed sleeve (5), a flow limiting hole (6) is formed in the fixed sleeve (5), the cavity between the neck pipe (3) and the fixed sleeve (5) is communicated with the cavity between the piston sleeve (7) and the sealing ring (4) through the flow limiting hole (6), the piston sleeve (7) seals one end of the exhaust pipe (2) in the neck pipe (3), the exhaust pipe (2) in the neck pipe (3) is fixedly provided with a sleeve ring (12) at one end, the end of the sleeve ring (12) opposite to the piston sleeve (7) is inserted into the ring groove (14) of the piston sleeve (7), the sleeve ring (12) is sealingly connected with the sealing ring (13) on the inner and outer sides of the ring groove (14), the sealing ring (13) is in sealing contact with the sleeve ring (12), the ring groove (14) is elastically and slidingly connected with a sliding ring (15), when the sleeve ring (12) is withdrawn from the ring groove (14), the inner edge and the outer edge of the sliding ring (15) can be in sealing contact with the two sealing rings (13) respectively.

2. An air cannon according to claim 1, wherein, The piston sleeve (7) and the sealing ring (4) are connected through a first spring (8).

3. An air cannon according to claim 2, wherein, The sliding ring (15) and the piston sleeve (7) are connected through a second spring (16).

4. An air cannon according to claim 3, wherein, The elastic force of the second spring (16) is smaller than that of the first spring (8).

5. The air cannon of claim 1, wherein, The exhaust pipe (2) in the neck pipe (3) is processed with a tapered surface at one end, a tapered block (11) is fixedly arranged at one end of the piston sleeve (7) facing the exhaust pipe (2), and the tapered block (11) is in sealing contact with the tapered surface.

6. The air cannon of claim 1, wherein, The sealing ring (13) is a high-temperature-resistant sealing ring.

7. The air cannon of claim 1, wherein, The sealing ring (4) is threadedly and sealingly connected with the neck pipe (3).

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