Ventilation box for feeding pressure reduction of stirring main machine

Abstract

The utility model relates to the field of engineering equipment, in particular to a ventilation box for feeding pressure reduction of a stirring main machine, which comprises a ventilation box body and an air jet assembly, the ventilation box body is a square cavity body with a downward opening, and the upper part of one side wall of the ventilation box body is provided with a ventilation hole; the air injection assembly is provided with injection rings capable of intensively injecting high-pressure air flow towards different directions around, and the injection rings are arranged in the cavity of the ventilation box body and can inject the high-pressure air flow towards the inner wall of the ventilation box body. According to the utility model, the ventilation box is improved, the jet ring of the air jet assembly, which can densely jet high-pressure air flow towards different directions, is suspended in the cavity of the ventilation box body, and the high-pressure air flow jetted by the jet ring can be used for strongly blowing air to the inner wall of the ventilation box body so as to clean residual pulp on the box wall and air-dry the box wall; the ventilation box body can be kept unobstructed, so that air in the cavity of the stirring main machine can be quickly exhausted to realize pressure reduction when the stirring main machine is used for feeding.

Description

Technical Field

[0001] The utility model relates to the field of engineering equipment, in particular to a ventilation box used for reducing the pressure of feeding into a stirring main machine. Background Art

[0002] The main function of a large-scale engineering mixing station or mixing building is to feed various aggregates, powders, water, additives, etc. into the mixing main unit from above after being measured separately for mixing and stirring. Since a large amount of dust will be generated when the mixing main unit is fed, affecting the surrounding environment, a cover will be set above the mixing main unit for closed operation. However, due to the high density of various powders such as cement, mineral powder, and fly ash, when a large amount of powder is fed quickly, the air in the mixing main unit is retained inside and forms a supporting force on the powder, so that the powder in the aggregate hopper cannot fall into the mixing main unit smoothly, affecting the production rhythm and mixing efficiency. In order to solve the problem of how to quickly discharge and reduce the pressure of the air in the cavity of the main mixer when feeding powder, the applicant has designed a vent box between the upper part of the powder collection hopper body and the upper cover of the main mixer. For details, see the utility model patent "An Improved Powder Collection Hopper" with the authorization announcement number CN219750623U, which describes "... by providing a vent box, the closed cavity at the upper part of the main mixer is connected to the upper inner cavity of the hopper and can be connected to the external dust removal and exhaust equipment through the decompression port of the collection hopper body, so that when the powder enters the main mixer, the air in the cavity of the main mixer is quickly discharged and reduced in pressure, so as to facilitate the hopper to unload into the main mixer..." This technology has been widely used. When feeding powder, the air in the cavity of the main mixer can be quickly discharged and reduced in pressure through the vent box, so that the powder hopper can be unloaded into the main mixer very smoothly. However, it was also found during the application process that during the water intake and stirring of the main mixer, water and slurry easily splashed from the lower opening of the ventilation box to the inner wall of the ventilation box and aggregated; since there is often residual powder on the inner wall of the ventilation box, especially cement powder, which easily forms slurry after meeting water and adheres to the inner wall of the ventilation box, if it is not cleaned in time, the continuously aggregated residual slurry will dry on the inner wall and affect the ventilation effect of the ventilation box. If it is not cleaned for a long time, it may even cause the ventilation box to be blocked, which in turn affects the rapid discharge of air in the cavity during the feeding of the main mixer to reduce pressure and ensure the smoothness of the feeding of the main mixer. In view of this, it is necessary to improve the ventilation box. Utility Model Content

[0003] In order to overcome the deficiencies in the prior art, the utility model discloses a ventilation box for reducing the pressure of feeding a mixing main machine, comprising a ventilation box body and an air spray assembly, wherein the ventilation box body is a square cavity body open downward, and a ventilation hole is provided on the upper part of one side wall thereof, and the air spray assembly is provided with a spray ring capable of densely spraying high-pressure airflow in different directions around, and the spray ring is placed in the cavity of the ventilation box body and can spray high-pressure airflow to the inner wall of the ventilation box body. The utility model improves the ventilation box, suspends the spray ring of the air spray assembly capable of densely spraying high-pressure airflow in different directions in the cavity of the ventilation box body, and utilizes the high-pressure airflow sprayed by the spray ring to forcefully blow the inner wall of the ventilation box body to clean the residual slurry on the box wall and air-dry the box wall, so that the ventilation box body can remain unobstructed, so that the air in the cavity of the mixing main machine can be quickly discharged to achieve pressure reduction when feeding.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0005] A ventilation box for reducing the pressure of feeding into a mixing main machine, the upper and lower parts of the ventilation box are respectively connected to the powder collecting hopper and the mixing main machine of a concrete mixing station and are fixedly connected to the powder collecting hopper and the upper cover of the mixing main machine, and is characterized in that it includes a ventilation box body and an air spray assembly, the ventilation box body is a square cavity body open downward, and a ventilation hole is provided on the upper part of one side wall, and the air spray assembly is provided with an annular tube component that can densely spray high-pressure airflow in different directions around, and the annular tube component of the air spray assembly is placed in the cavity of the ventilation box body and can spray high-pressure airflow toward the inner wall of the ventilation box body.

[0006] The ventilation box body comprises a front plate, a rear plate, a top plate and side plates. The side plates are two pieces, and the two side plates are fixedly connected with the front plate, the rear plate and the top plate to enclose a square cavity with an open bottom.

[0007] The top plate is arranged tilted.

[0008] The vent hole is a square hole and is arranged on the upper part of the rear plate.

[0009] The air spray assembly includes an injection ring, a connecting pipe and an air joint. The injection ring is hung by the connecting pipe and suspended in the middle of the cavity of the ventilation box body. The output end of the connecting pipe is connected to the injection ring, and its input end is connected to the air joint and connected to an external high-pressure air source through the air joint.

[0010] The injection ring is a ring tube component which is bent into a square frame shape by a hard pressure-resistant round tube and connected end to end. The round tube of the injection ring is densely provided with a plurality of injection holes on the half arc tube wall outside thereof, and the plurality of injection holes are scattered.

[0011] The connecting pipe includes a transverse pipe and an angular bend pipe fixedly connected and connected above the middle of the transverse pipe. The transverse pipe and the angular bend pipe are both made of hard pressure-resistant round pipes. Both ends of the transverse pipe of the connecting pipe are fixedly connected and connected to the injection ring. The angular bend pipe of the connecting pipe passes through the front plate of the ventilation box body and is fixedly connected to the front plate.

[0012] As can be seen from the above description, the advantage of the ventilation box for reducing pressure when feeding a mixing main machine provided by the utility model is that the injection ring of the air injection assembly that can densely spray high-pressure airflow in different directions is suspended in the cavity of the ventilation box body, and the high-pressure airflow sprayed by the injection ring can be used to forcefully blow the inner wall of the ventilation box body to clean the residual slurry on the box wall and air-dry the box wall, so that the ventilation box body can remain unobstructed, so that the air in the cavity of the mixing main machine can be quickly discharged to achieve pressure reduction when feeding. The utility model has a reasonable design, a simple structure, a low cost, and is easy to promote. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a general schematic diagram of a vent box for reducing the pressure of feeding into a stirring main machine according to the utility model;

[0014] Figure 2 for Figure 1 AA schematic diagram in;

[0015] Figure 3 for Figure 1 BB schematic diagram in;

[0016] Figure 4 for Figure 1 The enlarged schematic diagram of the C part in FIG.

[0017] Figure 5 It is an enlarged schematic diagram of the injection ring;

[0018] Figure 6 is an enlarged schematic diagram of the connecting pipe;

[0019] Figure 7 This is a schematic diagram of the positional relationship between the ventilation box and the external powder collection hopper and the mixing host.

[0020] Reference numerals:

[0021] 1 ventilation box body; 11 front plate; 12 rear plate; 13 top plate; 14 side plate; 10 ventilation hole; 2 air spray assembly; 21 spray ring; 211 spray hole; 22 connecting pipe; 23 air joint; 800 powder collecting hopper; 900 mixing host. DETAILED DESCRIPTION

[0022] The present invention is further described below through specific implementation methods.

[0023] like Figure 1 , Figure 2 and Figure 7 As shown, the utility model discloses a ventilation box for reducing the pressure of feeding into a mixing main machine, wherein the upper and lower parts of the ventilation box are respectively connected to the powder collecting hopper 800 and the mixing main machine 900 of the concrete mixing station and are fixedly connected to the upper covers of the powder collecting hopper 800 and the mixing main machine 900, and the ventilation box comprises a ventilation box body 1 and an air spray assembly 2, wherein the ventilation box body 1 is a square hollow body open downward, and an air hole 10 is provided on the upper part of one side wall thereof, and the air spray assembly 2 is provided with an annular tube component which can densely spray high-pressure airflow in different directions around, and the annular tube component of the air spray assembly 2 is placed in the cavity of the ventilation box body 1 and can spray high-pressure airflow toward the inner wall of the ventilation box body 1.

[0024] like Figures 1 to 3 As shown, the ventilation box body 1 of the utility model comprises a front plate 11, a rear plate 12, a top plate 13 and a side plate 14. The side plate 14 is two pieces, and the two side plates 14 are fixedly connected with the front plate 11, the rear plate 12 and the top plate 13 to form a square cavity with an open bottom. The top plate 13 is arranged obliquely, and the ventilation hole 10 is a square hole, and the ventilation hole 10 is arranged on the upper part of the rear plate 12.

[0025] like Figures 1 to 6 As shown, the gas spray assembly 2 of the utility model comprises a spray ring 21, a connecting pipe 22 and a gas joint 23. The spray ring 21 is suspended by the connecting pipe 22 and is suspended in the middle of the cavity of the ventilation box body 1. The output end of the connecting pipe 22 is connected to the spray ring 21, and the input end thereof is connected to the gas joint 23 and is connected to an external high-pressure gas source through the gas joint 23. The spray ring 21 is a ring tube component bent into a square frame shape by a hard pressure-resistant circular tube and connected end to end. The circular tube of the spray ring 21 is densely provided with a plurality of spray holes 211 on the half-circular arc tube wall on the outer side thereof, and the plurality of spray holes 211 are scattered. The connecting pipe 22 includes a transverse pipe and an angular bend pipe fixedly connected and connected to the upper middle part of the transverse pipe. The transverse pipe and the angular bend pipe are both made of hard pressure-resistant round pipes. Both ends of the transverse pipe of the connecting pipe 22 are fixedly connected and connected to the injection ring 21. The angular bend pipe of the connecting pipe 22 passes through the front plate 11 of the ventilation box body 1 and is fixedly connected to the front plate 11.

[0026] The ventilation box for reducing pressure during feeding of the mixing main machine described in the utility model does not work during the feeding and mixing process of the mixing main machine 900. During feeding, the air in the cavity of the mixing main machine 900 can enter the powder collecting hopper 800 through the channel of the ventilation box body 1, and the air is connected to the external dust removal and exhaust equipment through the pressure reducing port on the powder collecting hopper 800 for exhaust and pressure reducing. When the mixing main machine 900 just stops working, the air spraying assembly 2 can be connected to the external high-pressure air source, so that the high-pressure airflow is sprayed to the inner wall of the ventilation box body 1 through the plurality of air injection holes 211 of the injection ring 21 to clean the residual slurry on the box wall and air-dry the box wall.

[0027] The utility model improves the ventilation box, suspends the injection ring 21 of the air injection assembly 2 which can intensively inject high-pressure airflow in different directions in the cavity of the ventilation box body 1, and uses the high-pressure airflow injected by the injection ring 21 to forcefully blow the inner wall of the ventilation box body 1 to clean the residual slurry on the box wall and air-dry the box wall, so that the ventilation box body 1 can remain unobstructed, so that the air in the cavity of the mixing main machine can be quickly discharged to achieve pressure reduction when feeding.

[0028] The above is only a specific embodiment of the present utility model, but the design concept of the present utility model is not limited to this. Any non-substantial changes to the present utility model using this concept shall be deemed as an infringement of the protection scope of the present utility model.

Claims

1. A vent box for reducing the pressure of a mixing main machine during feeding, wherein the upper and lower parts of the vent box are respectively connected to a powder material collection hopper (800) and a mixing main machine (900) of a concrete mixing station and are fixed to the upper covers of the powder material collection hopper (800) and the mixing main machine (900), characterized in that: The invention comprises a ventilation box body (1) and an air spray assembly (2), wherein the ventilation box body (1) is a square cavity body opened downward, and an air hole (10) is arranged on the upper part of one side wall thereof, and the air spray assembly (2) is provided with an annular tube component capable of densely spraying high-pressure airflow in different directions around, and the annular tube component of the air spray assembly (2) is placed in the cavity of the ventilation box body (1) and can spray high-pressure airflow toward the inner wall of the ventilation box body (1).

2. A vent box for reducing the pressure of feed to a stirring main machine according to claim 1, characterized in that: The ventilation box body (1) comprises a front plate (11), a rear plate (12), a top plate (13) and a side plate (14). The side plate (14) is composed of two pieces. The two side plates (14) are fixedly connected to the front plate (11), the rear plate (12) and the top plate (13) to form a square cavity with an open bottom.

3. A vent box for reducing the pressure of feeding into a stirring main machine according to claim 2, characterized in that: The top plate (13) is arranged tilted.

4. A vent box for reducing the pressure of feed to a stirring main machine according to claim 2, characterized in that: The ventilation hole (10) is a square hole, and the ventilation hole (10) is arranged on the upper part of the rear plate (12).

5. A vent box for reducing the pressure of feed to a stirring machine according to claim 4, characterized in that: The air spray assembly (2) comprises an injection ring (21), a connecting pipe (22) and an air joint (23); the injection ring (21) is suspended by the connecting pipe (22) and is suspended in the middle of the cavity of the ventilation box body (1); the output end of the connecting pipe (22) is connected to the injection ring (21), and the input end thereof is connected to the air joint (23) and is connected to an external high-pressure air source via the air joint (23).

6. A vent box for reducing the pressure of feed to a stirring machine according to claim 5, characterized in that: The injection ring (21) is a ring tube component which is bent into a square frame shape from a hard pressure-resistant round tube and connected end to end. The round tube of the injection ring (21) is densely provided with a plurality of injection holes (211) on the half-circular arc tube wall on the outer side thereof, and the plurality of injection holes (211) are scattered.

7. A vent box for reducing the pressure of feed to a stirring machine according to claim 6, characterized in that: The connecting pipe (22) comprises a transverse pipe and an angular bend pipe fixedly connected and connected to the upper middle part of the transverse pipe, wherein the transverse pipe and the angular bend pipe are both made of hard pressure-resistant round pipes, and both ends of the transverse pipe of the connecting pipe (22) are fixedly connected and connected to the injection ring (21), and the angular bend pipe of the connecting pipe (22) passes through the front plate (11) of the ventilation box body (1) and is fixedly connected to the front plate (11).

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