CN215356030U

CN215356030U - Unidirectional air inlet device of pneumatic conveying casting sand storage hopper

Info

Publication number: CN215356030U
Application number: CN202120334985.7U
Authority: CN
Inventors: 徐祖安; 周栋夫; 邓明巨; 庞度; 江杰鹏; 吴军
Original assignee: Guangxi Yuchai Machinery Co Ltd
Current assignee: Guangxi Yuchai Machinery Co Ltd
Priority date: 2021-02-05
Filing date: 2021-02-05
Publication date: 2021-12-31
Anticipated expiration: 2031-02-05

Abstract

The utility model discloses a one-way air inlet device of a pneumatic conveying casting sand storage hopper, which comprises a sand storage hopper, wherein a top cover of the sand storage hopper is provided with a sand inlet and a dust suction port, and a one-way air inlet valve device is arranged on the top cover of the sand storage hopper. The utility model relates to a unidirectional air inlet device of a pneumatic conveying casting sand storage hopper, which belongs to the technical field of casting production, is convenient for dust collection and sand conveying, and solves the defects of insufficient air inlet speed and easy damage of a dust collection cloth bag in the prior art; the structure is reasonable and simple, the manufacture is easy, and the use is convenient; the sealing performance is good, and the reliability is high; the failure rate is low, and the maintenance is simple; the manufacturing cost is low, and the service life is long; the device has the advantages of outstanding performance, suitability for various sand storage hoppers needing unidirectional pneumatic conveying systems and wide application range.

Description

Unidirectional air inlet device of pneumatic conveying casting sand storage hopper

Technical Field

The utility model relates to a casting production technology, in particular to a one-way air inlet device of a pneumatic conveying casting sand storage hopper.

Background

The modern full-automatic core shooting machine has high yield and high speed, and has higher requirement on the sand mixing capability of a matched sand mixer, thereby having higher sand using demand. At present, the incoming material of a sand storage hopper is generally conveyed pneumatically, and the sand storage hopper is generally provided with a sand inlet (connected with a sand conveying pipe), a dust suction port (connected with a dust remover), an air inlet (connected with a special dust removal cloth bag) and a sand outlet. When the sand mixer uses sand, the raw sand flows out from the lower sand opening under the action of gravity. When the sand is sent, the dust absorption port absorbs dust with thinner diameter, the core sand quality is improved, and the exhaust plug of the mould is prevented from being blocked. If the sand is used, the pneumatic conveying device consumes the sand to convey the sand to the bucket every day, the pressure in the bucket is relatively balanced, and the sand discharging is relatively smooth; however, if the pneumatic conveying device stops conveying sand when the sand is used, the air inlet is far lower than the air suction amount of the dust suction opening due to the tightness of the dust removing cloth bag under the action of the dust remover, negative pressure can be formed in the sand storage hopper, air flow can enter from the lower sand opening, and accordingly raw sand is prevented from flowing out, and production efficiency is seriously affected. Moreover, the air conveying pressure is high, so that the air exhaust cloth bag is broken frequently, serious dust is caused, and the working environment is polluted.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problems of the prior art, and aims to provide a unidirectional air inlet device of a pneumatic conveying casting sand storage hopper, which is convenient for dust collection and sand conveying.

In order to achieve the purpose, the utility model provides a one-way air inlet device of a pneumatic conveying casting sand storage hopper, which comprises a sand storage hopper, wherein a top cover of the sand storage hopper is provided with a sand inlet and a dust suction port, and a top cover of the sand storage hopper is provided with a one-way air inlet valve device.

Furthermore, the sand inlet is arranged at the center of the sand storage hopper top cover, and the one-way air inlet valve device and the dust suction port are respectively arranged at two sides of the sand storage hopper top cover.

As a further improvement, the one-way intake valve device comprises an intake cylinder and a one-way valve assembly disposed in the intake cylinder.

Furthermore, the check valve assembly comprises a supporting beam arranged at the top in the air inlet cylinder and a sealing ring arranged below the supporting beam and arranged in the air inlet cylinder, the supporting beam is provided with a screw rod capable of sliding up and down, the bottom end of the screw rod is provided with a floating sealing plate adapted to the bottom surface of the sealing ring, and the top end of the screw rod is provided with a spring structure adapted to the top surface of the supporting beam.

Furthermore, the bottom end of the screw rod is provided with a first limiting nut which is matched with the bottom surface of the floating sealing plate, and the bottom end of the screw rod is provided with a locking nut which is matched with the top surface of the floating sealing plate.

Furthermore, the first limiting nut is a hexagonal slotted nut, and a cotter pin matched with a clamping groove of the hexagonal slotted nut is arranged at the bottom end of the screw rod.

Furthermore, a pressing plate is sleeved between the locking nut and the floating sealing plate at the bottom end of the screw rod.

As a further improvement, a second limiting nut matched with the top end of the spring structure is arranged at the top end of the screw rod, and gaskets are arranged at two ends, located on the spring structure, of the screw rod.

Furthermore, the bottom end of the air inlet cylinder is provided with a flange mounting structure connected with the top cover of the sand storage hopper.

As a further improvement, the bottom end in the air inlet cylinder is provided with a mounting ring, the bottom of the mounting ring is provided with a sieve plate, and the edge of the sieve plate is provided with a locking screw connected with the mounting ring.

Advantageous effects

Compared with the prior art, the unidirectional air inlet device of the pneumatic conveying casting sand storage hopper has the following beneficial effects: the unidirectional air inlet device of the pneumatic conveying casting sand storage hopper is convenient for dust collection and sand conveying, and overcomes the defects that a dust collection cloth bag in the prior art is insufficient in air inlet speed and easy to damage; the structure is reasonable and simple, the manufacture is easy, and the use is convenient; the sealing performance is good, and the reliability is high; the failure rate is low, and the maintenance is simple; the manufacturing cost is low, and the service life is long; the device has the advantages of outstanding performance, suitability for various sand storage hoppers needing unidirectional pneumatic conveying systems and wide application range.

Drawings

FIG. 1 is a schematic structural view of a unidirectional air inlet device of a pneumatic conveying casting sand storage hopper of the utility model;

FIG. 2 is an enlarged cross-sectional view of the construction of the one-way intake valve apparatus of the present invention;

fig. 3 is an enlarged plan view of the structure of the one-way intake valve device of the present invention.

In the figure: 1. a sand storage hopper; 2. a sand inlet; 3. a dust suction port; 4. a one-way air intake valve arrangement; 5. an air inlet cylinder; 6. a one-way valve assembly; 7. a support beam; 8. a seal ring; 9. a screw; 10. a floating seal plate; 11. a spring structure; 12. sealing the rubber gasket; 13. a first limit nut; 14. locking the nut; 15. a cotter pin; 16. pressing a plate; 17. a second limit nut; 18. a gasket; 19. a flange mounting structure; 20. a mounting ring; 21. a sieve plate; 22. and locking the screw.

Detailed Description

The following detailed description of the present invention is provided in conjunction with the accompanying drawings, but it should be understood that the scope of the present invention is not limited to the specific embodiments.

The specific embodiments of the present invention are such that: as shown in fig. 1-3, a unidirectional air inlet device of a pneumatic conveying casting sand storage hopper comprises a sand storage hopper 1, a sand inlet 2 and a dust suction port 3 are arranged on a top cover of the sand storage hopper 1, and a unidirectional air inlet valve device 4 is arranged on the top cover of the sand storage hopper 1. In this pneumatic conveying casting sand stores one-way air inlet unit of fill, one-way admission valve device 4 can make in the external gas can get into sand storage hopper 1, then, 3 departments of dust absorption mouth set up the air extraction equipment, the air extraction equipment convulsions, make one-way admission valve device 4's valve open outside air and take out in sand storage hopper 1, the air gets into and drives the dust of sand storage hopper 1 behind the sand storage hopper 1 and flow to 3 directions of dust absorption mouth, thereby take out through dust absorption mouth 3, reach the purpose of dust absorption, reduce the dust content of psammitolite, improve the core sand quality, prevent to block up the mould core vent.

And, the dust absorption mouth 3 bleeds, and the air is admitted to one-way admission valve device 4, forms the air current in storing up sand hopper 1, and the air current can drive the raw materials sand that advances sand mouth 2 and get into and drop to storing up in the sand hopper 1 fast, improves the flow velocity of raw materials sand, raises the efficiency.

In this embodiment, the sand inlet 2 is disposed at the center of the top cover of the sand storage hopper 1, and the one-way air inlet valve device 4 and the dust suction port 3 are respectively disposed at two sides of the top cover of the sand storage hopper 1.

In this embodiment, the one-way air intake valve device 4 includes an air inlet cylinder 5 and a one-way valve assembly 6 arranged in the air inlet cylinder 5, the bottom end of the air inlet cylinder 5 is provided with a flange mounting structure 19 connected with the top cover of the sand storage hopper 1, the air inlet cylinder 5 is connected with the top cover of the sand storage hopper 1 in a sealing manner through the flange mounting structure 19, and the connection is quick and the air tightness is good.

In the embodiment, the check valve assembly 6 comprises a supporting beam 7 arranged at the top in the air inlet cylinder 5 and a sealing ring 8 arranged below the supporting beam 7 and arranged in the air inlet cylinder 5, wherein a screw 9 capable of sliding up and down is arranged on the supporting beam 7, a floating sealing plate 10 adapted to the bottom surface of the sealing ring 8 is arranged at the bottom end of the screw 9, a spring structure 11 adapted to the top surface of the supporting beam 7 is arranged at the top end of the screw 9, negative pressure is formed in the sand storage hopper 1 when the dust suction port 3 sucks air, the floating sealing plate 10 at the bottom end of the screw 9 slides downwards, and air enters the sand storage hopper 1 below from an inner hole of the sealing ring 8; when sand is being fed into the sand inlet 2 or the dust suction port 3 stops pumping air, no negative pressure exists in the sand storage hopper 1, the screw rod 9 slides upwards under the rebound action of the spring structure 11 to drive the floating sealing plate 10 to move upwards, and then the inner hole of the sealing ring 8 is sealed to prevent dust from flowing out.

In this embodiment, be equipped with sealed cushion 12 between the bottom surface of floating seal plate 10 and sealing ring 8, sealed cushion 12 is the rubber construction, and the leakproofness is good, can also play the cushioning effect when floating seal plate 10 contacts with sealing ring 8.

In this embodiment, the bottom end of the screw 9 is provided with a first limit nut 13 adapted to the bottom surface of the floating seal plate 10, and the bottom end of the screw 9 is provided with a lock nut 14 adapted to the top surface of the floating seal plate 10.

In this embodiment, the first limiting nut 13 is a hexagonal slotted nut, and the bottom end of the screw 9 is provided with a cotter 15 adapted to a slot of the hexagonal slotted nut.

In the embodiment, a pressure plate 16 is sleeved at the bottom end of the screw 9 between the locking nut 14 and the floating sealing plate 10, and the diameter of the pressure plate 16 is smaller than the bore diameter of the inner hole of the sealing ring 8.

In this embodiment, the top end of the screw 9 is provided with a second limit nut 17 adapted to the top end of the spring structure 11, and the two ends of the screw 9 located at the spring structure 11 are provided with washers 18.

In this embodiment, the bottom in the air inlet section of thick bamboo 5 is equipped with collar 20, and the bottom of collar 20 is equipped with sieve 21, and the edge of sieve 21 is equipped with the locking screw 22 of being connected with collar 20, and sieve 21 can play the filtering action, prevents that raw materials sand and dust in the sand storage hopper 1 from getting into in the air inlet section of thick bamboo 5.

The specific using process is as follows: when the pneumatic conveying device conveys sand into the sand storage hopper 1, positive pressure is formed in the hopper, gas pressure directly acts on the floating sealing plate 10, the sealing performance is tighter, and the air pressure is released to the dust suction port; when the sand feeding is stopped, under the action of air extraction equipment such as a dust remover and the like, negative pressure is formed in the hopper, and at the moment, the atmospheric pressure overcomes the elasticity of the spring structure 11 of the one-way valve, so that the floating sealing plate 10 descends, the inside of the hopper is directly communicated with the outside, the internal pressure and the external pressure are balanced, and the aim of smoothly feeding sand at a sand feeding port is fulfilled. The device is made of common materials, simple in structure, easy to manufacture, high in reliability and low in maintenance cost, and does not need the action of the floating sealing plate 10 of an external power control valve.

The unidirectional air inlet device of the pneumatic conveying casting sand storage hopper overcomes the defects that a dust removal cloth bag in the prior art is insufficient in air inlet speed and easy to damage; the structure is reasonable and simple, the manufacture is easy, and the use is convenient; the sealing performance is good, and the reliability is high; the failure rate is low, and the maintenance is simple; the manufacturing cost is low, and the service life is long; the device has the advantages of being suitable for various sand storage hoppers needing unidirectional pneumatic conveying systems and wide in application range.

The above is only a preferred embodiment of the present invention, and it should be noted that it is obvious to those skilled in the art that several variations and modifications can be made without departing from the structure of the present invention, which will not affect the effect of the implementation of the present invention and the utility of the patent.

Claims

1. The one-way air inlet device of the pneumatic conveying casting sand storage hopper comprises a sand storage hopper (1) and is characterized in that a top cover of the sand storage hopper (1) is provided with a sand inlet (2) and a dust suction port (3), the top cover of the sand storage hopper (1) is provided with a one-way air inlet valve device (4), the sand inlet (2) is arranged at the center of the top cover of the sand storage hopper (1), the one-way air inlet valve device (4) and the dust suction port (3) are respectively arranged at two sides of the top cover of the sand storage hopper (1), the one-way air inlet valve device (4) comprises an air inlet cylinder (5) and a one-way valve component (6) arranged in the air inlet cylinder (5), the one-way valve component (6) comprises a supporting beam (7) arranged at the top in the air inlet cylinder (5) and a sealing ring (8) arranged below the supporting beam (7) and arranged in the air inlet cylinder (5), the sealing ring is characterized in that a screw rod (9) capable of sliding up and down is arranged on the supporting beam (7), a floating sealing plate (10) adaptive to the bottom surface of the sealing ring (8) is arranged at the bottom end of the screw rod (9), and a spring structure (11) adaptive to the top surface of the supporting beam (7) is arranged at the top end of the screw rod (9).

2. The unidirectional air inlet device of the pneumatic conveying casting sand storage hopper as recited in claim 1, wherein a first limit nut (13) adapted to the bottom surface of the floating sealing plate (10) is arranged at the bottom end of the screw (9), and a locking nut (14) adapted to the top surface of the floating sealing plate (10) is arranged at the bottom end of the screw (9).

3. The unidirectional air inlet device of the pneumatic conveying casting sand storage hopper as claimed in claim 2, wherein the first limit nut (13) is a hexagonal slotted nut, and a split pin (15) matched with a clamping groove of the hexagonal slotted nut is arranged at the bottom end of the screw (9).

4. The unidirectional air inlet device of the pneumatic conveying casting sand storage hopper as recited in claim 2, characterized in that a pressure plate (16) is sleeved at the bottom end of the screw (9) between the locking nut (14) and the floating sealing plate (10).

5. The unidirectional air inlet device of the pneumatic conveying casting sand storage hopper as claimed in any one of claims 1 to 4, wherein a second limit nut (17) adapted to the top end of the spring structure (11) is arranged at the top end of the screw (9), and gaskets (18) are arranged at two ends of the spring structure (11) on the screw (9).

6. The unidirectional air inlet device of the pneumatic conveying casting sand storage hopper as claimed in claim 5, wherein a flange mounting structure (19) connected with a top cover of the sand storage hopper (1) is arranged at the bottom end of the air inlet cylinder (5).

7. The unidirectional air inlet device of the pneumatic conveying casting sand storage hopper as claimed in claim 5, wherein a mounting ring (20) is arranged at the bottom end in the air inlet cylinder (5), a screen plate (21) is arranged at the bottom of the mounting ring (20), and a locking screw (22) connected with the mounting ring (20) is arranged at the edge of the screen plate (21).