Dust backflow prevention device for dust collection of mixing plant

Abstract

The utility model relates to a dust backflow prevention device for dust collection of a mixing plant, which belongs to the technical field of dust collection equipment of the mixing plant and comprises a dust bin and a dust collector, a dust backflow prevention mechanism is arranged on the outer side of the dust collector and comprises an air inducing pipe fixedly connected to the top of the dust bin, and the air inducing pipe is fixedly connected with the top of the dust bin. And the top of the dust collector is fixedly connected with a conversion box communicating with the air inducing pipe, and the interior of the conversion box is fixedly connected with a conduction pipe. According to the dust backflow prevention device for dust collection of the mixing plant, dust in the dust bin can enter the conversion box from the air inducing pipe along with airflow and enter the dust collector through the conduction pipe and the dust discharging pipe, and in the process, the arranged exhaust structure can achieve the pressure relief effect so that the dust can be prevented from flowing upwards along with air, and the dust backflow prevention effect is achieved. And therefore, the dust is effectively prevented from flowing back to the powder bin along with the gas, the material mixing phenomenon is avoided, and the practicability of the device is conveniently improved under the condition that the dust collection effect is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of dust collection equipment for mixing plants, and particularly relates to an anti-dust backflow device for dust collection in a mixing plant. Background Technique

[0002] Mixing plants are mainly used in concrete projects, and their main purpose is to mix and blend concrete, also known as concrete mixing plants. Most mixing plants are equipped with several powder silos containing different cement grades. In order to prevent the pressure in the powder silos from increasing due to air blowing and causing the deformation of the silo body and safety accidents, a dust collector is needed to collect the discharged gas dust into a container and then uniformly process it. However, if each powder silo is separately equipped with a dust collector in a mixing plant, it not only occupies a large area, has a high investment cost, but also has a high equipment operation cost and is troublesome to operate and maintain. To avoid the above disadvantages, usually several powder silos share a dust collector.

[0003] Please refer to an anti-dust backflow device for dust collection in a mixing plant with the publication number of CN205926552U. In this patent, it is proposed that "in the existing dust collection method, since several powder silos are all connected to the dust collector, when feeding a powder silo through a Roots blower, the gas and dust are often blown into the other several powder silos. This not only has a poor dust collection effect, but also causes the phenomenon of material mixing, and the use effect is very unsatisfactory." Through the setting of an anti-dust backflow mechanism, this patent can effectively avoid the backflow phenomenon of gas caused by the mutual penetration of powder silos, thereby maintaining a good dust collection effect.

[0004] However, the conversion box set in the above patent does not have an exhaust structure. When the internal air pressure of the conversion box increases, although it can prevent gas from escaping and entering other powder silos, it also hinders the flow of gas carrying dust in the upper dust exhaust pipe into the conversion box, thereby reducing the dust collection effect and having limitations in use. In view of this, this application proposes an anti-dust backflow device for dust collection in a mixing plant. Content of the Utility Model

[0005] Aiming at the deficiencies of the prior art, the utility model provides an anti-dust backflow device for dust collection in a mixing plant, which has the advantages of being able to maintain the air pressure in the air guide pipe greater than the internal air pressure of the transmission pipe, thereby avoiding the occurrence of dust backflow, effectively preventing the generation of material mixing phenomenon, and thus improving the practicability of the device. It solves the problem that in the existing dust collection method, since several powder silos are all connected to the dust collector, when feeding a powder silo through a Roots blower, the gas and dust are often blown into the other several powder silos, which not only has a poor dust collection effect, but also causes the phenomenon of material mixing, and the use effect is very unsatisfactory.

[0006] To achieve the above object, the present utility model provides the following technical solutions: An anti-dust backflow device for a mixing plant dust collection, including a dust bin and a dust collector, and an anti-dust backflow mechanism is arranged outside the dust collector;

[0007] The anti-dust backflow mechanism includes an air guide pipe fixedly connected to the top of the dust bin, a conversion box fixedly connected to the top of the dust collector and communicated with the air guide pipe, a transmission pipe fixedly connected inside the conversion box, a dust discharge pipe fixedly connected to the bottom of the transmission pipe and extending into the dust collector, and an exhaust structure for balancing the air pressure inside and outside the transmission pipe is arranged inside the conversion box;

[0008] A plugging cylinder for plugging the air guide pipe is movably connected inside the transmission pipe, and a pushing component for pushing the plugging cylinder is arranged inside the transmission pipe.

[0009] Further, the exhaust structure includes an exhaust pipe fixedly connected inside the transmission pipe and extending outside the conversion box, a one-way valve is fixedly connected inside the exhaust pipe, and a plurality of dust-proof filters are fixedly connected to the opposite sides of the air guide pipe and the transmission pipe.

[0010] Further, the pushing component includes a fixed block fixedly connected inside the transmission pipe, a limiting rod fixedly connected to the bottom of the plugging cylinder and slidably connected to the fixed block, and a compression spring fixedly connected to the outside of the limiting rod and respectively fixedly connected to the fixed block and the plugging cylinder.

[0011] Further, a damper fixedly connected to the plugging cylinder is arranged inside the fixed block, and a plurality of ash discharge holes are formed in the outside of the fixed block.

[0012] Further, a pressure gauge and a safety valve are fixedly connected to the top of the dust bin, and a feed inlet is fixedly connected to the outside of the dust bin.

[0013] Further, a dust discharge valve is fixedly connected to the bottom of the dust collector, and a dust discharge port is fixedly connected to the bottom of the dust discharge valve.

[0014] Compared with the prior art, the technical solution of the present application has the following beneficial effects:

[0015] The anti-dust backflow device for the mixing plant dust collection can make the dust in the dust bin enter the conversion box from the air guide pipe along with the air flow, and then enter the dust collector through the transmission pipe and the dust discharge pipe. In this process, the arranged exhaust structure can achieve the pressure relief function, so as to prevent the dust from flowing upward with the gas, and further effectively prevent the dust from flowing back to the powder bin with the gas, avoiding the generation of material mixing phenomenon, and thus facilitating the improvement of the practicality of the device while ensuring the dust collection effect. Description of the Drawings

[0016] Figure 1This is the front view of the structure of the present utility model;

[0017] Figure 2 This is the side sectional view of the conversion box of the present utility model;

[0018] Figure 3 This is the schematic structural view of the fixing block and the plugging cylinder of the present utility model.

[0019] In the figure: 1, dust bin; 2, dust collector; 3, air draft pipe; 4, conversion box; 5, dust discharge pipe; 6, transmission pipe; 7, fixing block; 701, ash discharge hole; 8, limiting rod; 9, plugging cylinder; 10, extrusion spring; 11, dust-proof filter screen; 12, exhaust pipe; 13, one-way valve; 14, ash discharge valve; 15, ash discharge opening; 16, feeding port; 17, pressure gauge; 18, safety valve; 19, damper. Specific implementation manners

[0020] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0021] Please refer to Figures 1 to 3 , an anti-dust backflow device for a mixing plant dust collection in this embodiment, includes a dust bin 1 and a dust collector 2, and an anti-dust backflow mechanism is arranged outside the dust collector 2.

[0022] In this embodiment, the anti-dust backflow mechanism includes an air draft pipe 3 fixedly connected to the top of the dust bin 1, a conversion box 4 fixedly connected to the top of the dust collector 2 and communicated with the air draft pipe 3, a transmission pipe 6 fixedly connected inside the conversion box 4, and a dust discharge pipe 5 fixedly connected to the bottom of the transmission pipe 6 and extending into the dust collector 2, which facilitates the dust to enter the dust collector 2 from the dust bin 1 through the air draft pipe 3, the transmission pipe 6 and the dust discharge pipe 5.

[0023] Among them, a pressure gauge 17 and a safety valve 18 are fixedly connected to the top of the dust bin 1, and a feeding port 16 is fixedly connected to the outside of the dust bin 1, which facilitates the feeding of powder into the dust bin 1 through the feeding port 16. The provided safety valve 18 can realize the regulation of the internal pressure of the dust bin 1, and the cooperation with the provided pressure gauge 17 can facilitate the control of the internal pressure of the dust bin 1.

[0024] Among them, an ash discharge valve 14 is fixedly connected to the bottom of the dust collector 2, and an ash discharge opening 15 is fixedly connected to the bottom of the ash discharge valve 14, which facilitates the discharge of the collected dust in the dust collector 2 through the opening of the ash discharge valve 14 and the ash discharge opening 15.

[0025] In this embodiment, an exhaust structure for balancing the air pressure inside and outside the transfer pipe 6 is provided inside the conversion box 4; the exhaust structure includes an exhaust pipe 12 fixedly connected inside the transfer pipe 6 and extending to the outside of the conversion box 4. A one-way valve 13 is fixedly connected inside the exhaust pipe 12. A plurality of dust-proof filters 11 are fixedly connected to the side of the air guide pipe 3 opposite to the transfer pipe 6, facilitating the discharge of the gas inside the transfer pipe 6 through the exhaust pipe 12, and the provided dust-proof filters 11 can prevent dust from moving upward.

[0026] Among them, a plugging cylinder 9 for plugging the air guide pipe 3 is movably connected inside the transfer pipe 6, and a pushing component for pushing the plugging cylinder 9 is provided inside the transfer pipe 6; the pushing component includes a fixed block 7 fixedly connected inside the transfer pipe 6. A limiting rod 8 fixedly connected to the bottom of the plugging cylinder 9 is slidably connected to the fixed block 7. An extrusion spring 10 fixedly connected to both the fixed block 7 and the plugging cylinder 9 is fixedly connected to the outside of the limiting rod 8, facilitating the plugging cylinder 9 to block the air guide pipe 3 under the push of the extrusion spring 10.

[0027] Among them, a damper 19 fixedly connected to the plugging cylinder 9 is provided inside the fixed block 7, facilitating the use of the damper 19 to improve the movement stability of the plugging cylinder 9 and avoid the plugging cylinder 9 from being damaged due to reciprocating vibration. The fixed block 7 is convex-shaped and is slidably adapted to the inner wall of the plugging cylinder 9, facilitating maintaining a good plugging effect. A plurality of dust discharge holes 701 are provided on the outside of the fixed block 7, facilitating the downward movement of dust by means of the provided dust discharge holes 701.

[0028] The beneficial effects of the above embodiment are as follows:

[0029] For the dust-proof backflow device for the dust collection of the mixing plant, the dust in the dust bin 1 can enter the conversion box 4 with the air flow from the air guide pipe 3, and then enter the dust collector 2 through the transfer pipe 6 and the dust discharge pipe 5. During this process, the provided exhaust structure can achieve a pressure relief function, so as to prevent dust from flowing upward with the gas, and further effectively prevent dust from flowing back to the powder bin with the gas, avoiding the generation of material mixing phenomenon. Thus, it is convenient to improve the practicability of the device while ensuring the dust collection effect.

[0030] The working principle of the above embodiment is as follows:

[0031] For the dust-proof backflow device used in the dust collection of this mixing plant, during use, since the exhaust pipe 12 provided in the transfer pipe 6 is communicated with the outside, the air pressure inside the transfer pipe 6, the dust exhaust pipe 5 and the dust collector 2 is always the same as the outside atmosphere. Therefore, when the dust is conveyed from the dust bin 1 to the transfer pipe 6 through the air guide pipe 3, the air pressure in the air guide pipe 3 can overcome the thrust of the compression spring 10 to push open the blocking cylinder 9, so that the dust in the dust bin 1 can flow to the transfer pipe 6 through the air guide pipe 3, ensuring that the air pressure in the air guide pipe 3 is always greater than the air pressure inside the transfer pipe 6, thereby effectively preventing the movement of dust into the air guide pipe 3, achieving the effect of preventing the backflow of dust to the powder bin, and effectively avoiding the occurrence of material mixing phenomenon.

[0032] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the existence of additional identical elements in the process, method, article or device comprising the element.

[0033] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A dust backflow prevention device for dust collection in a mixing station, comprising a dust bin (1) and a dust collector (2), characterized in that: The outer side of the dust collector (2) is provided with a dust backflow prevention mechanism; The dust backflow prevention mechanism comprises an air duct (3) fixedly connected to the top of the dust bin (1); a conversion box (4) connected to the air duct (3) is fixedly connected to the top of the dust collector (2); a conduction pipe (6) is fixedly connected inside the conversion box (4); a dust exhaust pipe (5) extending to the inside of the dust collector (2) is fixedly connected to the bottom of the conduction pipe (6); and an exhaust structure for balancing the air pressure inside and outside the conduction pipe (6) is arranged inside the conversion box (4); The inside of the conduction tube (6) is movably connected with a blocking cylinder (9) for blocking the air duct (3), and the inside of the conduction tube (6) is provided with a pushing component for pushing the blocking cylinder (9).

2. The dust backflow prevention device for dust collection in a mixing station according to claim 1 is characterized in that: The exhaust structure comprises an exhaust pipe (12) fixedly connected to the inside of the conduction pipe (6) and extending to the outside of the conversion box (4); a one-way valve (13) is fixedly connected to the inside of the exhaust pipe (12); and a plurality of dust-proof filters (11) are fixedly connected to the opposite side of the air duct (3) and the conduction pipe (6).

3. The dust backflow prevention device for dust collection in a mixing station according to claim 1, characterized in that: The pushing assembly comprises a fixed block (7) fixedly connected to the inside of the conducting tube (6); a limiting rod (8) slidably connected to the fixed block (7) is fixedly connected to the bottom of the blocking tube (9); and an extrusion spring (10) fixedly connected to the fixed block (7) and the blocking tube (9) respectively is fixedly connected to the outer side of the limiting rod (8).

4. The dust backflow prevention device for dust collection in a mixing station according to claim 3 is characterized in that: A damper (19) fixedly connected to the blocking cylinder (9) is arranged inside the fixing block (7), and a plurality of ash discharge holes (701) are opened on the outside of the fixing block (7).

5. The dust backflow prevention device for dust collection in a mixing station according to claim 1 is characterized in that: A pressure gauge (17) and a safety valve (18) are fixedly connected to the top of the dust bin (1), and a feed port (16) is fixedly connected to the outside of the dust bin (1).

6. The dust backflow prevention device for dust collection in a mixing station according to claim 1, characterized in that: The bottom of the dust collector (2) is fixedly connected to an ash discharge valve (14), and the bottom of the ash discharge valve (14) is fixedly connected to an ash discharge port (15).

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