Airtight chamber assembly for material conveying and dust conveying system

Abstract

The utility model provides an airtight chamber assembly for material conveying and a dust conveying system, the airtight chamber assembly for material conveying is arranged between an expansion joint and a blanking pipe, and comprises an airtight chamber, an air supply structure and a return pipe; the bottom of the airtight chamber is provided with a discharging port, the top of the airtight chamber is provided with a discharging pipe, the discharging pipe is communicated with an inner cavity of the airtight chamber, and the airtight chamber is further provided with an air inlet and an air outlet; the air outlet end of the air supply structure is connected with the air inlet; the inlet end of the return pipe is connected with the air outlet, and the outlet end of the return pipe is communicated with the outlet end of the dust bin. According to the airtight chamber assembly for material conveying, the airtight chamber is additionally arranged between the expansion joint and the blanking pipe, and compressed air in the airtight chamber can counteract negative pressure generated at the discharge port of the airtight chamber when powder is conveyed, so that the negative pressure is prevented from entering upstream process equipment through the blanking pipe, and the equipment is prevented from being damaged; and potential safety hazards are reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of dust treatment, and in particular relates to an airtight chamber for material transportation. Background Art

[0002] Powder conveying is generally achieved by using a centrifugal fan negative pressure powder conveying process. When the system starts running, the discharger below the powder collecting tank continuously drops the powder material along the discharge pipe. The bottom of the discharge pipe is connected to the transport compartment of the transport vehicle to load the powder into the transport vehicle.

[0003] However, in the existing centrifugal fan negative pressure powder conveying process, when the desulfurizer is delivering powder, a negative pressure of exhaust air will be generated at the material inlet. The negative pressure will damage the expansion joint on the discharge pipe, resulting in obstruction of the rotation of the feeding wheel of the star feeder, causing the star feeder motor to overcurrent trip or damage. The negative pressure will also cause the air pressure in the powder bin to decrease, causing a safety hazard. In severe cases, the cover of the powder bin will be opened, and a large amount of air will enter the powder bin, causing the powder to spontaneously combust. Utility Model Content

[0004] The embodiments of the utility model provide an airtight chamber assembly for material conveying and a dust conveying system, aiming to solve the problem of negative pressure generated at the material inlet in the prior art, which enters the powder bin and causes safety hazards.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] In a first aspect, an airtight chamber assembly for material conveying is provided, which is arranged between an expansion joint and a drop pipe, and comprises:

[0007] An airtight chamber, with a discharge port at the bottom, a feed pipe at the top of the airtight chamber, a lower end opening of the feed pipe located at the bottom of the inner cavity of the airtight chamber and connected with the inlet of the feed pipe, an upper end opening of the feed pipe connected with the bottom end of the expansion joint, and an air inlet and an air outlet are also provided on the airtight chamber;

[0008] An air supply structure, the air outlet of which is connected to the air inlet; and

[0009] The inlet end of the reflux pipe is connected to the air outlet, and the outlet end of the reflux pipe is communicated with the outlet end of the dust bin.

[0010] In combination with the first aspect, in a possible implementation, a feed pipe is provided in the airtight chamber, the top end of the feed pipe passes through the airtight chamber, the top end of the feed pipe forms the feed port, the bottom end of the feed pipe is located in the airtight chamber, and there is a vertical interval between the bottom end of the feed pipe and the discharge port.

[0011] In combination with the first aspect, in a possible implementation manner, the air inlet and the air outlet are respectively provided with a switch valve.

[0012] In combination with the first aspect, in a possible implementation manner, the outer shell of the airtight chamber is a conical shell, and the radial area of ​​the airtight chamber gradually decreases from top to bottom.

[0013] In combination with the first aspect, in a possible implementation, the diameter of the discharge port is greater than the diameter of the discharge pipe.

[0014] In combination with the first aspect, in a possible implementation, the gas supply structure includes a gas compression unit, a gas storage unit and a gas outlet pipe connected in sequence, and a flow meter is provided on the gas outlet pipe, and the flow meter is communicatively connected to the corresponding switch valve.

[0015] Compared with the prior art, the utility model provides an airtight chamber for material conveying, in which an airtight chamber is additionally provided between the expansion joint and the blanking pipe, the air inlet of the airtight chamber is connected to the air supply structure, and the air supply structure continuously supplies compressed air to the airtight chamber. The compressed air in the airtight chamber can offset the negative pressure generated at the discharge port of the airtight chamber when conveying powder, thereby preventing the negative pressure from entering the upstream process equipment through the blanking pipe and preventing equipment damage; the negative pressure will not reduce the pressure of the dust bin, thereby reducing safety hazards; the powder in the dust bin is disturbed by the refluxed compressed air to make the powder flow, thereby realizing fluidization of the powder, preventing the powder from sticking together to form powder blocks, and increasing the smoothness and efficiency of powder transportation.

[0016] In a second aspect, a dust conveying system is provided, comprising a dust bin, a feeder, an expansion joint, an airtight chamber assembly for material conveying as described in any of the possible implementation methods mentioned above, a drop pipe, and an exhaust assembly connected in sequence from top to bottom, wherein the return pipe of the airtight chamber assembly for material conveying is connected to the discharge end of the dust bin.

[0017] In combination with the second aspect, in a possible implementation, the air suction assembly includes a centrifugal fan, and the centrifugal fan is disposed on the drop pipe.

[0018] In combination with the second aspect, in a possible implementation, the exhaust assembly includes a fan and a powder injector, the feed end of the powder injector is connected to the outlet end of the blanking pipe, and the fan is connected to the air inlet opening of the powder injector.

[0019] In combination with the second aspect, in a possible implementation, the outer peripheral surface of the discharge end of the dust bin is provided with a plurality of air inlet holes, the plurality of air inlet holes are respectively distributed along the circumference of the dust bin, and are respectively connected to the air outlet end of the return pipe, and the plurality of air inlet holes are respectively connected to the inner cavity of the dust bin.

[0020] Compared with the prior art, the dust conveying system provided by the utility model has an additional airtight chamber between the expansion joint and the blanking pipe, the air inlet of the airtight chamber is connected to the air supply structure, and the air supply structure continuously supplies compressed air to the airtight chamber. The compressed air in the airtight chamber can offset the negative pressure generated at the discharge port of the airtight chamber due to the conveying of powder, and avoid the negative pressure from entering the upstream process equipment through the blanking pipe, thereby avoiding equipment damage; the negative pressure will not reduce the pressure in the dust bin, thereby reducing safety hazards; part of the compressed air can enter the discharge end of the dust bin along the reflux pipe, and the powder in the dust bin is disturbed by the refluxed compressed air, so that the powder flows, and the fluidization of the powder is realized, thereby avoiding the powder from sticking together to form powder blocks, and increasing the smoothness and efficiency of powder transportation. Compressed air can offset the negative pressure and increase the fluidity of the powder, thereby increasing the overall discharge speed and improving the discharge efficiency of the powder. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0022] Figure 1 A schematic structural diagram of an airtight chamber assembly for material conveying provided in Embodiment 1 of the utility model;

[0023] Figure 2 This is a schematic diagram of the assembly of the airtight chamber and the air extraction assembly used in the first embodiment of the present utility model;

[0024] Figure 3 This is a schematic diagram of the assembly of the airtight chamber and the air extraction component used in the second embodiment of the present utility model.

[0025] Description of reference numerals:

[0026] 1. Airtight chamber; 11. Air inlet; 12. Air outlet; 13. Feeding pipe; 14. Switch valve;

[0027] 2. Gas supply structure; 21. Gas outlet pipe; 22. Gas compression unit; 23. Gas storage unit; 24. Flow meter;

[0028] 3. Reflux pipe;

[0029] 4. Dust bin; 41. Air inlet;

[0030] 5. Expansion joint;

[0031] 6. Dropping pipe;

[0032] 7. Exhaust assembly; 71. Centrifugal fan; 72. Fan; 73. Powder injector. DETAILED DESCRIPTION

[0033] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0034] It should be noted that the terms "length", "width", "height", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "head", "tail", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model.

[0035] It should also be noted that, unless otherwise clearly specified and limited, the terms such as "install", "connect", "connect", "fix", "set" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In addition, the meaning of "multiple" and "several" is two or more, unless otherwise clearly and specifically defined.

[0037] Please also read Figures 1 to 3, the airtight chamber for material conveying provided by the utility model is now described. The airtight chamber assembly for material conveying is arranged between the expansion joint 5 and the drop pipe 6, and the airtight chamber assembly for material conveying includes an airtight chamber 1, an air supply structure 2 and a return pipe 3. A discharge port is provided at the bottom of the airtight chamber 1, and a drop pipe 13 is provided at the top of the airtight chamber 1. The lower end opening of the drop pipe 13 is located at the bottom of the inner cavity of the airtight chamber 1 and is connected to the inlet of the drop pipe 6. The upper end opening of the drop pipe 13 is connected to the bottom end of the expansion joint. An air inlet 11 and an air outlet 12 are also provided on the airtight chamber 1; the air outlet end of the air supply structure 2 is connected to the air inlet 11; the inlet end of the return pipe 3 is connected to the air outlet 12, and the outlet end of the return pipe 3 is connected to the outlet end of the dust bin 4.

[0038] It should be noted that the existing powder transport system is provided with a dust bin 4, a feeder, an expansion joint 5 and a drop pipe 6 in order from top to bottom. An exhaust assembly 7 is provided at the bottom of the drop pipe 6 to exhaust air so that the powder in the dust bin 4 falls.

[0039] Compared with the prior art, the airtight chamber assembly for material conveying provided in the present embodiment has an additional airtight chamber 1 between the expansion joint 5 and the blanking pipe 6, and the air inlet 11 of the airtight chamber 1 is connected to the air supply structure 2, and the air supply structure 2 continuously supplies compressed air to the airtight chamber 1. The compressed air in the airtight chamber 1 can offset the negative pressure generated at the discharge port of the airtight chamber 1 due to the conveying of powder, thereby preventing the negative pressure from entering the upstream process equipment through the blanking pipe 6 and avoiding equipment damage; the negative pressure will not reduce the pressure in the dust bin 4, reducing safety hazards; the powder in the dust bin 4 is disturbed by the refluxed compressed air to make the powder flow, thereby realizing fluidization of the powder, preventing the powder from sticking together to form powder blocks, and increasing the smoothness and efficiency of powder transportation.

[0040] In some embodiments, see Figure 1 The top of the feed pipe 13 passes through the airtight chamber 1, and the bottom of the feed pipe 13 is located in the airtight chamber 1, and there is a vertical gap between the bottom of the feed pipe 13 and the discharge port. Dust falls from the feed pipe 13 and will not spread throughout the airtight chamber 1. Compressed air can enter the airtight chamber 1 from the air inlet 11 and offset the negative pressure in the gap between the feed pipe 13 and the discharge port. The top of the feed pipe 13 passes through the airtight chamber 1 and can completely receive the powder.

[0041] In some embodiments, see Figure 1, the air inlet 11 and the air outlet 12 are respectively provided with a switch valve 14. The setting of the switch valve 14 allows the staff to control the opening and closing state of the air inlet 11 and the air outlet 12, open the air inlet 11 at the appropriate time to eliminate the negative pressure, and open the switch valve 14 on the air outlet 12 at the same time, so that the airtight chamber 1 and the dust bin 4 are connected, and the compressed air enters the dust bin 4 to fluidize the powder, increase the flow efficiency, and avoid the powder from compacting. When the powder reserve is small, the two switch valves 14 can be closed, and the powder can be transported according to the conventional process to save energy.

[0042] In some embodiments, see Figure 1 The outer shell of the airtight chamber 1 is a conical shell, and the radial area of ​​the airtight chamber 1 gradually decreases from top to bottom. The radial area of ​​the airtight chamber 1 gradually decreases, which can guide the compressed air downward to offset the negative pressure and improve the negative pressure offset effect.

[0043] In some embodiments, the diameter of the discharge port is larger than the diameter of the feed tube 13. The large diameter of the discharge port can fully receive the powder from the feed tube 13 to prevent the powder from remaining in the airtight chamber 1. In addition, the size of the gap between the bottom end of the feed tube 13 and the discharge port is increased to ensure that the negative pressure in the gap is completely offset by the compressed air.

[0044] During specific implementation, the upper portion of the feed pipe 13 is fixedly connected to the airtight chamber 1 , and there is a gap between the discharge port of the feed pipe 13 and the airtight chamber 1 .

[0045] In some embodiments, see Figure 1 The air supply structure 2 includes a gas compression unit 22, a gas storage unit 23 and an air outlet pipe 21 connected in sequence. A flow meter 24 is provided on the air outlet pipe 21, and the flow meter 24 is in communication connection with the corresponding switch valve 14. The gas compression unit 22 can compress the air to give it a certain impact force. The gas storage unit 23 can store compressed air, which is convenient for using and storing compressed air. When the switch valve 14 is opened, the compressed air is discharged from the gas storage unit 23 and enters the airtight chamber 1 along the air outlet pipe 21 to realize the supply of compressed air. The flow meter 24 can detect the flow of compressed air, thereby controlling the opening degree of the switch valve 14, which is convenient for changing the strength of compressed air according to the negative pressure strength.

[0046] In a specific implementation, the gas compression unit 22 is an air compressor, the gas storage unit 23 is an air storage tank, and the flow meter 24 is a gas flow meter.

[0047] Based on the same inventive concept, the present application also provides a dust conveying system, see Figure 2 and Figure 3, including a dust bin 4, a feeder, an expansion joint 5, an airtight chamber assembly for material conveying as in any of the above embodiments, a drop pipe 6 and an exhaust assembly 7 connected in sequence from top to bottom, wherein the return pipe 3 of the airtight chamber assembly 1 for material conveying is connected to the discharge end of the dust bin 4.

[0048] Compared with the prior art, the dust conveying system provided by the utility model has an additional airtight chamber 1 between the expansion joint 5 and the blanking pipe 6. The air inlet 11 of the airtight chamber 1 is connected to the air supply structure 2. The air supply structure 2 continuously supplies compressed air to the airtight chamber 1. The compressed air in the airtight chamber 1 can offset the negative pressure generated at the discharge port of the airtight chamber 1 when conveying powder, thereby preventing the negative pressure from entering the upstream process equipment through the blanking pipe 6 and avoiding equipment damage; the negative pressure will not reduce the pressure in the dust bin 4, thereby reducing safety hazards; the powder in the dust bin 4 is disturbed by the refluxed compressed air, so that the powder flows, the fluidization of the powder is achieved, the powder is prevented from sticking together to form powder blocks, and the smoothness and efficiency of powder transportation are increased. Compressed air can offset the negative pressure and increase the fluidity of the powder, thereby increasing the overall material discharge speed and improving the powder discharge efficiency.

[0049] In some embodiments, see Figure 3 The exhaust assembly 7 includes a centrifugal fan 71, which is arranged on the drop pipe 6. The centrifugal fan 71 and the upstream equipment constitute a powder negative pressure conveying system, and the centrifugal fan 71 is used to exhaust air, and the powder in the dust bin 4 is extracted and sprayed into the designated storage space.

[0050] In some embodiments, see Figure 2 The exhaust assembly 7 includes a fan 72 and a powder injector 73. The feed end of the powder injector 73 is connected to the outlet end of the blanking pipe 6, and the fan 72 is connected to the air inlet opening of the powder injector 73. The powder injector 73 and the fan 72 form a powder positive pressure conveying system with upstream equipment. The fan 72 extracts air to extract the powder in the dust bin 4. The powder falls along the blanking pipe 6 and flows into the powder injector 73, and is sprayed from the powder injector 73 to the designated space.

[0051] In a specific implementation, the blower 72 is a Roots blower, and the powder injector 73 is a Venturi powder injector.

[0052] In some embodiments, see Figures 1 to 3 The outer peripheral surface of the discharge end of the dust bin 4 is provided with a plurality of air inlet holes 41, which are respectively distributed along the circumference of the dust bin 4 and respectively communicated with the air outlet end of the return pipe 3, and are respectively communicated with the inner cavity of the dust bin 4. The plurality of air inlet holes 41 are arranged around the dust bin 4, which can ensure that after the plurality of air flows enter the dust bin 4 from the air inlet holes 41, the powder is driven to flow downward, and the powder is prevented from flowing in other directions and affecting the falling of the powder.

[0053] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An airtight chamber assembly for material conveying, arranged between an expansion joint and a drop pipe, characterized in that: include: An airtight chamber, with a discharge port at the bottom, a feed pipe at the top of the airtight chamber, a lower end opening of the feed pipe located at the bottom of the inner cavity of the airtight chamber and connected with the inlet of the feed pipe, an upper end opening of the feed pipe connected with the bottom end of the expansion joint, and an air inlet and an air outlet are also provided on the airtight chamber; An air supply structure, the air outlet of which is connected to the air inlet; and The inlet end of the reflux pipe is connected to the air outlet, and the outlet end of the reflux pipe is communicated with the outlet end of the dust bin.

2. The airtight chamber assembly for material transportation according to claim 1, characterized in that: The top end of the feed pipe passes through the airtight chamber, the bottom end of the feed pipe is located in the airtight chamber, and there is a vertical interval between the bottom end of the feed pipe and the discharge port.

3. The airtight chamber assembly for material transportation according to claim 1, characterized in that: The air inlet and the air outlet are respectively provided with switch valves.

4. The airtight chamber assembly for material transportation according to claim 1, characterized in that: The outer shell of the airtight chamber is a conical shell, and the radial area of ​​the airtight chamber gradually decreases from top to bottom.

5. The airtight chamber assembly for material transportation according to claim 2, characterized in that: The diameter of the discharge port is greater than the diameter of the discharge pipe.

6. The airtight chamber assembly for material transportation according to claim 3, characterized in that: The gas supply structure comprises a gas compression unit, a gas storage unit and a gas outlet pipe which are connected in sequence. A flow meter is provided on the gas outlet pipe, and the flow meter is communicatively connected with the corresponding switch valve.

7. A dust conveying system, characterized in that: It comprises a dust bin, a feeder, an expansion joint, an airtight chamber assembly for material conveying as described in any one of claims 1 to 6, a drop pipe and an exhaust component connected in sequence from top to bottom, wherein the return pipe of the airtight chamber assembly for material conveying is connected to the discharge end of the dust bin.

8. The dust conveying system according to claim 7, characterized in that: The air extraction component comprises a centrifugal fan, and the centrifugal fan is arranged on the drop pipe.

9. The dust conveying system according to claim 7, characterized in that: The air extraction assembly comprises a fan and a powder injector, the feed end of the powder injector is communicated with the outlet end of the blanking pipe, and the fan is communicated with the air inlet opening of the powder injector.

10. The dust conveying system according to claim 7, characterized in that: The outer peripheral surface of the discharge end of the dust bin is provided with a plurality of air inlet holes, which are respectively distributed along the circumference of the dust bin and respectively connected to the air outlet end of the return pipe, and the plurality of air inlet holes are respectively connected to the inner cavity of the dust bin.

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