A filtering and recycling system for an attracting and transporting tanker truck and an attracting and transporting tanker truck

Abstract

The present invention relates to a filtering and recycling system for a suction and pressure delivery tanker and the suction and pressure delivery tanker. The filtering and recycling system includes a recycling pipeline, a bag filter device and a cyclone separator which are connected in communication. One end of the recycling pipeline is simultaneously connected in communication with the bag filter device and the cyclone separator, and the other end is used for connecting in communication with a storage tank; it further includes a flow control assembly. The flow control assembly includes a flow detection element, a control element and a valve. The valve is arranged on the recycling pipeline and is located at one end close to the storage tank; the flow detection element is arranged on the recycling pipeline and is used for detecting the material flow rate in the recycling pipeline; the output end of the flow detection element is electrically connected to the input end of the control element, and the output end of the control element is electrically connected to the input end of the valve. The suction and pressure delivery tanker includes the above filtering and recycling system. The present invention can effectively prevent the recycling pipeline from being blocked during back suction and ensure the normal use of the filtering and recycling system.

Description

Technical Field

[0001] The present invention relates to the technical field of suction and pressure delivery tank trucks, and more specifically, to a filtration and recovery system for a suction and pressure delivery tank truck and a suction and pressure delivery tank truck. Background Art

[0002] A suction and pressure delivery tank truck combines the principles of negative pressure pneumatic conveying and positive pressure pneumatic conveying of comprehensive materials, and organically combines the two pneumatic conveyings. Using air as the carrier for material conveying, it is a special production equipment that realizes automatic material suction, sealed transportation, and automatic material discharge in a closed space. The suction and pressure delivery tank truck is used for in-plant transfer work of transporting dust materials such as ironmaking, steelmaking, sintering, coking, smelting desilication, desulfurization, dephosphorization agents, blast furnace, and converter dust. The entire process of material suction, transportation, and discharge is carried out in a closed environment, and dust does not leak and fly, meeting national environmental protection standards. Currently, more and more metallurgical industries use suction and pressure delivery tank trucks for transporting powdery materials.

[0003] The suction and pressure delivery tank truck mainly consists of an automobile chassis, a storage tank, a vacuum suction system, a positive pressure discharge system, a filtration and recovery system, a hydraulic system, and a central control system, etc. The storage tank is a hollow tank for storing powdery materials, and the filtration and recovery system is connected to the storage tank. During the suction operation, by extracting the air in the storage tank, a negative pressure is formed inside the storage tank, and the powdery materials are sucked from the silo into the storage tank along with the air. During the continuous extraction of the air inside the storage tank, some materials will be sucked out of the storage tank along with the air. If this part of the materials is directly discharged, it will cause pollution to the air environment and also result in waste of materials. Therefore, the suction and pressure delivery tank truck is provided with a filtration and recovery system to filter the extracted air and filter and recover the materials therein.

[0004] The filtration and recovery system mainly includes a recovery pipeline and a connected bag filter device, a cyclone separator, and a filter. The cyclone separator is connected to the storage tank. The air extracted from the storage tank flows through the cyclone separator, the bag filter device, and the filter in sequence for filtration and separation and then is discharged. The powdery materials are mainly filtered and retained in the bag filter device and the cyclone separator during this process. One end of the recovery pipeline is connected to both the bag filter device and the cyclone separator at the same time, and the other end is connected to the discharge port of the storage tank through an external pipeline. During material recovery, by filling air into the bag filter device and the cyclone separator, the materials inside the bag filter device and the cyclone separator flow through the recovery pipeline and the external pipeline and return to the discharge port of the storage tank along with the air, and flow into an external container connected to the discharge port through the external pipeline for recovery.

[0005] During the material recovery process, since one end of the external pipeline is closer to the storage tank, if the inflation speed is too fast, blockages often easily occur at the external pipeline. When the external pipeline becomes blocked, workers need to use the reverse suction method to dredge the external pipeline. However, in the recovery pipeline of the existing filtration and recovery system, the valve is usually located at one end close to the bag filter device. When using the reverse suction method, materials are likely to enter the recovery pipeline, causing blockages in the recovery pipeline.

[0006] In addition, most of the pipe sections in the recovery pipeline are connected by quick hose connectors. After a long period of use, the quick hose connectors will show wear. If not replaced in time, problems such as loose connections and insufficient pressure-bearing capacity, which are prone to bursting, will occur, posing certain safety hazards.

[0007] In summary, in the existing filtration and recovery system of the suction and pressure delivery tank truck, the recovery pipeline has defects such as being prone to blockage during reverse suction, easy wear of the connection structure, low service life, difficult maintenance, and certain safety hazards. Therefore, in combination with the actual application requirements, it is very necessary to design a filtration and recovery system that is anti-blocking during reverse suction, easier to maintain, and safer. Summary of the Invention

[0008] Aiming at the deficiencies of the existing technology, one of the purposes of the present invention is to provide a filtration and recovery system for a suction and pressure delivery tank truck, and the second purpose is to provide a suction and pressure delivery tank truck. The present invention can effectively prevent blockage of the recovery pipeline during reverse suction and ensure the normal use of the filtration and recovery system.

[0009] The above technical purpose of the present invention is achieved through the following technical solutions: A filtration and recovery system for a suction and pressure delivery tank truck includes a recovery pipeline, a bag filter device, and a cyclone separator that are connected and communicate with each other. One end of the recovery pipeline is connected and communicates with both the bag filter device and the cyclone separator at the same time, and the other end is used to communicate with the discharge port of the storage tank; it further includes a flow control component. The flow control component includes a flow detection element, a control element, and a valve. The valve is arranged on the recovery pipeline and is located at one end close to the storage tank; the flow detection element is arranged on the recovery pipeline and is used to detect the material flow in the recovery pipeline; the output end of the flow detection element is electrically connected to the input end of the control element, and the output end of the control element is electrically connected to the input end of the valve;

[0010] The control element controls the opening and closing of the valve according to the detection signal of the flow detection element.

[0011] In one of the embodiments, the valve is a pneumatic valve. The pneumatic valve is connected to an external air source through an air pipe, and an electric control air valve is arranged on the air pipe. The output end of the control element is electrically connected to the input end of the electric control air valve;

[0012] The control element controls the opening and closing of the electro-pneumatic valve according to the detection signal of the flow detection element, and further controls the on-off of the air pipe, so as to open or close the pneumatic valve.

[0013] In one embodiment, the control element is a relay or a single-chip microcomputer.

[0014] In one embodiment, the flow detection element is electrically connected to the control element through a shielded cable.

[0015] In one embodiment, the flow detection element is a powder flow detector.

[0016] In one embodiment, the recovery pipeline includes a discharge port end pipe, a discharge pipe and a connecting pipe; one end of the discharge port end pipe communicates with the storage tank, and the other end is provided with a first flange seat; one end of the discharge pipe is simultaneously connected to the bag filter device and the cyclone separation device, and the other end is provided with a second flange seat; both ends of the connecting pipe are respectively provided with a first connecting flange and a second connecting flange adapted to the first flange seat and the second flange seat, the first connecting flange is connected to the first flange seat, and the second connecting flange is connected to the second flange seat.

[0017] In one embodiment, the connecting pipe is a copper wire hose, and the first flange seat, the second flange seat, the first connecting flange and the second connecting flange are all made of steel.

[0018] In one embodiment, the valve is arranged at the first flange seat.

[0019] In one embodiment, the flow detection element is arranged at the second flange seat.

[0020] An aspirating and pressure-feeding tanker truck according to the present invention includes an automotive chassis and a storage tank, a vacuum suction system and a positive pressure discharging system arranged on the automotive chassis; and further includes a filtering and recovery system as described above, the filtering and recovery system communicates with the discharge port of the storage tank, and is used for filtering and recovering the materials drawn out with the air from the storage tank during the vacuum suction process.

[0021] In summary, the filtering and recovery system described in the present invention has the following beneficial effects:

[0022] 1. The valve of the present invention is arranged at one end close to the storage tank, and the flow rate in the recovery pipeline is automatically detected by a flow detection element. When the flow rate in the recovery pipeline is significantly low, the valve on the recovery pipeline is automatically closed to seal the recovery pipeline, avoiding the blockage of the recovery pipeline caused by the inflow of materials into the recovery pipeline when the external pipeline is dredged by the reverse suction method, ensuring the smoothness of the recovery pipeline and the normal use of the filtration and recovery system. At the same time, by using a flow detection element for detection and an automatic control element to control the opening and closing of the valve, there is no need for manual monitoring and control of the opening and closing of the valve, with a higher degree of automation and greater intelligence.

[0023] 2. The recovery pipeline is divided into three sections, and the flange seat and flange are used for connection at the connection position, which can make the connection firm, have good airtightness and be convenient for disassembly and assembly. The recovery pipeline, flange seat and flange are all made of metal materials, which are more durable and resistant to high pressure compared with the rubber connectors in the prior art, can effectively reduce the replacement frequency of the connectors, are more convenient for daily maintenance, and can also reduce the risk of the connector bursting due to wear, improving the safety and reliability of the recovery pipeline.

[0024] The suction and pressure delivery tanker described in the present invention adopts the above-mentioned filtration and recovery system, and has the advantages of preventing blockage during the reverse suction process, being more intelligent, more durable and having higher safety. Brief Description of the Drawings

[0025] Figure 1 is a schematic structural diagram of a filtration and recovery system of a suction and pressure delivery tanker according to the present invention;

[0026] Figure 2 is a schematic diagram of the connection relationship of the recovery pipeline described in the present invention;

[0027] Figure 3 is a structural block diagram of the flow control assembly described in the present invention.

[0028] In the figure: 1 - bag filter device, 2 - cyclone separator, 3 - recovery pipeline, 31 - discharge port end pipe, 32 - discharge pipe, 33 - connecting pipe, 41 - flow detection element, 42 - control element, 43 - valve, 51 - first flange seat, 52 - second flange seat, 53 - first connecting flange, 54 - second connecting flange, 6 - storage tank. Detailed Embodiments

[0029] The present invention will be described in detail below with reference to the drawings and embodiments.

[0030] In the description of this application, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc. is usually based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing this application and simplifying the description. Without contrary instructions, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation on the protection scope of this application.

[0031] For ease of description, spatial relative terms such as "above...", "over...", "on the upper surface of...", "upper...", etc. can be used here to describe the spatial positional relationship of a device or feature shown in the drawings with other devices or features. It should be understood that spatial relative terms are intended to include different orientations in use or operation other than the orientation described in the drawings for the device. For example, if the device in the drawing is inverted, the device described as "above other devices or structures" or "over other devices or structures" will then be positioned "below other devices or structures" or "under other devices or structures". Thus, the exemplary term "above..." can include both the orientations of "above..." and "below...". The device can also be positioned in other different ways (rotated 90° or in other orientations), and corresponding interpretations should be made for the spatial relative descriptions used here.

[0032] In addition, it should be noted that the use of words such as "first", "second", etc. to limit components is only for the convenience of distinguishing the corresponding components. Without additional statements, the above words have no special meanings. Therefore, it should not be construed as a limitation on the protection scope of this application.

[0033] Such as Figures 1 - 3As shown in the figure, a filtering and recycling system for an attracting and pressure-feeding tanker truck includes a recycling pipeline 3 and a bag filter device 1 and a cyclone separator device 2 that are connected and communicated with each other. Generally, the bag filter device 1 and the cyclone separator device 2 are respectively arranged in a hollow tank body, so they are usually commonly referred to as the "bag tank" and the "cyclone tank". The bag filter device 1 uses filter cloth fibers as a filter layer and can effectively filter dust in the gas. The cyclone separator device 2 is a dry gas-solid separation device that separates dust from the airflow by using the centrifugal force difference generated when the gas-solid mixture rotates at a high speed. For the specific structures of the bag filter device 1 and the cyclone separator device 2, reference can be made to the bag filter and the cyclone separator in the prior art, which will not be elaborated here. In this embodiment, during vacuum suction, the gas extracted from the storage tank 6 is mixed with some materials and sequentially passes through the cyclone separator device 2 and the bag filter device 1 for gas-solid separation and filtration. During this process, the powdery materials will be retained in the bag filter device 1 and the cyclone separator device 2, and the air can be directly discharged up to the emission standard. The materials retained in the bag filter device 1 and the cyclone separator device 2 are recycled through the recycling pipeline 3 described below.

[0034] One end of the recycling pipeline 3 is simultaneously connected and communicated with the bag filter device 1 and the cyclone separator device 2, and the other end is used to be connected and communicated with the discharge port of the storage tank 6 through an external pipeline. The filtering and recycling system further includes a flow control assembly. The flow control assembly includes a flow detection element 41, a control element 42, and a valve 43. The valve 43 is arranged on the recycling pipeline 3 and is located at one end close to the storage tank 6 for controlling the on-off of the end of the recycling pipeline 3 close to the storage tank 6. The flow detection element 41 is arranged on the recycling pipeline 3, and its detection end extends into the interior of the recycling pipeline 3 for detecting the internal flow of the recycling pipeline 3. The output end of the flow detection element 41 is electrically connected to the input end of the control element 42, and the output end of the control element 42 is electrically connected to the input end of the valve 43. The control element 42 controls the opening and closing of the valve 43 according to the detection signal of the flow detection element 41.

[0035] The applicant of this case found during the actual work process that when the recycling pipeline 3 is connected to the storage tank 6 through an external pipeline and air is filled into the bag filter device 1 and the cyclone separator device 2 for material recycling, the external pipeline is often blocked. When the anti-suction method is used to dredge after the blockage, the materials often enter the recycling pipeline 3 and cause blockage of the recycling pipeline 3, which is caused by the unreasonable setting position of the valve of the recycling pipeline 3. Therefore, in this embodiment, the applicant sets the valve 43 of the recycling pipeline 3 at one end close to the storage tank 6, so that when the valve 43 is closed, it can effectively prevent the materials in the external pipeline from flowing into the recycling pipeline 3 and ensure the smoothness of the recycling pipeline 3.

[0036] Further use reveals that simply setting the valve 43 of the recovery pipeline 3 requires manual closing. At a busy production site, workers often forget to close the valve 43 during backflow, resulting in blockage of the recovery pipeline 3 during the backflow process. In addition, the applicant also found that workers cannot visually monitor whether the recovery pipeline 3 and the external pipeline are blocked. Often, it can only be discovered when the blockage in the external pipeline is relatively serious, which makes it more difficult, time-consuming, and laborious to dredge. Therefore, in this embodiment, the applicant has provided a flow detection element 41 on the recovery pipeline 3 to detect the material flow rate in the recovery pipeline 3, and the control element 42 controls the opening and closing of the valve 43 according to the control signal of the flow detection element 41. In this way, when the flow detection element 41 detects that the material flow rate in the recovery pipeline 3 is lower than a certain threshold, it means that the material flow in the pipeline is abnormal and the possibility of blockage in the external pipeline is very high. At this time, the control element 42 controls the valve 43 to automatically close, cutting off the connection between the recovery pipeline 3 and the external pipeline. At the same time, an alarm signal can be sent through a warning light and a buzzer to prompt the worker to process it in time. In this way, the worker does not need to manually close the valve 43 and can directly perform backflow treatment, which is convenient to operate. At the same time, it also solves the problem of blockage of the recovery pipeline 3 caused by forgetting to close the valve 43, ensuring the smoothness of the recovery pipeline 3. In addition, the flow detection element 41 can detect the material flow rate in the recovery pipeline 3 in real time. Since the external pipeline is connected to the recovery pipeline 3, when there is a blockage in the external pipeline and the material flow rate in the recovery pipeline 3 is significantly abnormal, the control element 42 can send an alarm signal in time, so that the material flow condition in the pipeline can be monitored in real time, the blockage in the external pipeline can be discovered early, and it is convenient to perform backflow dredging treatment in time.

[0037] The present invention sets the valve 43 at one end close to the storage tank 6, and automatically detects the flow rate in the recovery pipeline 3 through the flow detection element 41. When the flow rate in the recovery pipeline 3 is significantly low, the valve 43 on the recovery pipeline 3 is automatically closed to seal the recovery pipeline 3, preventing the material from flowing into the recovery pipeline 3 during the backflow method for dredging the external pipeline, resulting in blockage of the recovery pipeline 3, and ensuring the smoothness of the recovery pipeline 3 and the normal use of the filtration and recovery system. At the same time, the flow detection element 41 is used for detection, and the control element 42 automatically controls the opening and closing of the valve 43, eliminating the need for manual monitoring and control of the opening and closing of the valve 43, with a higher degree of automation and greater intelligence.

[0038] In one of the embodiments, the valve 43 is a pneumatic valve. More specifically, a pneumatic ball valve is selected. The pneumatic valve is connected to an external air source, such as the vehicle air source, through an air pipe. An electrically controlled air valve is provided on the air pipe. The output end of the control element 42 is electrically connected to the input end of the electrically controlled air valve. The control element 42 controls the opening and closing of the electrically controlled air valve according to the detection signal of the flow rate detection element 41, and further controls the on-off of the air pipe, so as to open or close the pneumatic valve. The pneumatic valve uses gas as the power to control the opening and closing. When the air is supplied, the pneumatic valve opens, and when the air supply is cut off, the pneumatic valve closes. Specifically in this embodiment, when the external pipeline is unobstructed and the material flows normally, the electrically controlled air valve opens, the air source is connected to the pneumatic valve, and the pneumatic valve opens; when the external pipeline is blocked, the electrically controlled air valve closes, the air source is cut off from the pneumatic valve, and the pneumatic valve closes. Considering that the valve 43 is arranged in the recovery pipeline 3 and dust flows inside the valve 43 during operation, and the application environment is dusty, if an electrically controlled valve is arranged in the recovery pipeline 3 to control the on-off of the pipeline, during use, dust is likely to enter the inside of the electrically controlled valve and damage the circuit structure of the electrically controlled valve. Therefore, in this embodiment, a pneumatic valve is arranged in the recovery pipeline 3, and the opening and closing of the pneumatic valve is indirectly controlled by controlling the on-off of the air pipe through the electrically controlled air valve. The pneumatic valve is driven by gas and will not be affected or damaged by dust, while the electrically controlled air valve is arranged on the air pipe and does not need to be in direct contact with dust and will not be affected by dust. This setting method is more suitable for the application environment in the recovery pipeline 3, has a long service life, and is not easily damaged.

[0039] In one of the embodiments, the control element 42 can be a relay or a single-chip microcomputer. In this embodiment, the function that the control element 42 needs to achieve is to drive the valve 43 to perform a closing action when the output signal of the flow rate detection element 41 is lower than a certain threshold. This control function is relatively simple, so a relay or a single-chip microcomputer can be used to achieve it. A relay is a component that makes the controlled quantity undergo a predetermined step change (the valve 43 closes in this embodiment) in the electrical output circuit when the change of the input quantity or excitation quantity reaches the preset requirement (the flow rate threshold in this embodiment). The single-chip microcomputer can output corresponding control instructions according to the change of the input signal to control common actuators such as motors and electrically controlled valves to perform predetermined actions. Using the above two control elements has the advantages of low component cost and easy control implementation.

[0040] In one of the embodiments, the flow rate detection element 41 is electrically connected to the control element 42 through a 2*1mm 2 shielded cable. The shielded cable has stable signal transmission and strong anti-interference ability. In some preferred embodiments, dust and moisture prevention treatments are performed at both ends of the shielded cable connection to extend the service life of the shielded cable.

[0041] In one embodiment, the flow detection element 41 is selected as a powder flow detector. The powder flow detector can be a BR-MODEL50 series powder flowmeter produced by Qingdao Boschrui Industrial Technology Co., Ltd. This flowmeter can accurately detect the powder flow in the pipeline and convert the detection signal into a digital signal that can be recognized by the control element 42 and output outward.

[0042] In one embodiment, please refer in detail to Figure 2 , the recovery pipeline 3 has a three-section structure, namely a discharge port end pipe 31, a discharge pipe 32 and a connecting pipe 33. The discharge port end pipe 31 is a steel pipe, one end is connected to the storage tank, and the other end is provided with a first flange seat 51. The discharge pipe 32 is a steel pipe, one end is connected to both the bag filter device 1 and the cyclone separator device 2, and the other end is provided with a second flange seat 52. Both ends of the connecting pipe 33 are provided with a first connecting flange 53 and a second connecting flange 54 that are adapted to the first flange seat 51 and the second flange seat 52 respectively. The first connecting flange 53 is connected to the first flange seat 51, and the second connecting flange 54 is connected to the second flange seat 52. The three-section structure of the recovery pipeline 3 is more convenient for disassembly, installation and maintenance replacement. On the other hand, the connection method of using a flange seat to cooperate with a flange between the discharge port end pipe 31, the discharge pipe 32 and the connecting pipe 33 can make the connection position stable, have good airtightness, and be convenient for disassembly and assembly.

[0043] In one embodiment, the connecting pipe 33 is a copper wire hose. The copper connecting pipe 33 has good wear resistance and high-pressure resistance, so that the connecting pipe 33 has a long service life and good durability. The first flange seat 51, the second flange seat 52, the first connecting flange 53 and the second connecting flange 54 are all made of steel. The steel flange seats and connecting flanges are wear-resistant, high-pressure resistant and have a long service life. In this way, the entire recovery pipeline 3 is made of metal materials, which is more durable and high-pressure resistant than the rubber connectors in the prior art, can effectively reduce the replacement frequency of the connectors, is more convenient for daily maintenance, and at the same time can reduce the risk of the connector bursting due to wear, improving the safety and reliability of the recovery pipeline 3.

[0044] In one embodiment, the valve 43 is arranged at the first flange seat 51, which is convenient for the fixing and installation of the valve 43, so that when the valve 43 is closed, it can effectively prevent materials from entering the recovery pipeline 3 from the external pipeline.

[0045] In one embodiment, the flow detection element 41 is arranged at the second flange seat 52, which is convenient for the fixing and installation of the flow detection element 41.

[0046] The present invention also provides a suction and pressure delivery tanker truck, which includes an automotive chassis, a storage tank 6, a vacuum suction system, and a positive pressure discharge system disposed on the automotive chassis. The vacuum suction system mainly consists of a vacuum pump, pipelines, and pipeline valves. The positive pressure discharge system mainly consists of an air compressor, pipelines, and pipeline valves. For the specific selection and connection relationship of each component of the vacuum suction system and the positive pressure discharge system, reference can be made to the structure of the suction and pressure delivery tanker truck in the prior art, which will not be elaborated herein. The suction and pressure delivery tanker truck further includes the above-mentioned filtration and recovery system, which is connected to the discharge port of the storage tank 6 and is used to filter and recover the materials drawn out with the air from the storage tank 6 during the vacuum suction process.

[0047] The suction and pressure delivery tanker truck of the present invention adopts the above-mentioned filtration and recovery system, and has the advantages of preventing blockage during the reverse suction process, being more intelligent, more durable, and having higher safety.

[0048] Hereinafter, in combination with the vacuum suction process, the positive pressure discharge process, and the filtration and recovery process of the suction and pressure delivery tanker truck, the working processes of the filtration and recovery system and the suction and pressure delivery tanker truck of the present invention will be elaborated in detail.

[0049] Vacuum suction process:

[0050] Connect the suction pipe of the storage tank 6 to the receiving bin, start the vacuum pump to extract the air in the storage tank 6, so that a negative pressure is formed inside it, a pressure difference is generated between the receiving bin and the storage tank 6, and an air flow flowing from the receiving bin to the storage tank 6 is formed. The dusty materials in the receiving bin flow into the storage tank 6 along with the air flow, and the air extraction process continues for material suction. During the air extraction process, the air drawn out from the storage tank 6 flows through the cyclone separation device 2 and the bag filter device 1 in sequence for gas-solid separation and filtration. The gas is discharged, and the dust materials in the gas remain in the bag filter device 1 and the cyclone separation device 2.

[0051] Positive pressure discharge process:

[0052] Connect the storage tank 6 to the discharge point, connect an external air source to fill the storage tank 6 with air, so that a pressure difference is generated between the storage tank 6 and the discharge point, and an air flow flowing from the storage tank 6 to the discharge point is formed, and the materials flow into the discharge point along with the air flow.

[0053] Filtration and recovery process:

[0054] After the positive pressure discharging process ends, it is necessary to recover the materials remaining in the bag filter device 1 and the cyclone separator device 2. Inject air into the bag filter device 1 and the cyclone separator device 2. After the air pressure in the bag filter device 1 and the cyclone separator device 2 reaches 0.15 MPa, open the valve 43 on the recovery pipeline 3. The materials in the bag filter device 1 and the cyclone separator device 2 flow to the discharge port of the storage tank 6 through the recovery pipeline 3, and then flow into an external container through an external pipeline for recovery. During this process, the flow detection element 41 detects the material flow rate in the pipeline in real time. When the material flow rate is lower than a preset threshold, the control element 42 controls the valve 43 of the recovery pipeline 3 to close, shutting off the external pipeline from the recovery pipeline 3. At the same time, an alarm signal is issued. The worker performs a reverse suction and dredging treatment on the external pipeline. After the external pipeline is unblocked, the filtration and recovery process continues until the materials in the bag filter device 1 and the cyclone separator device 2 are recovered completely.

[0055] The above are only the preferred embodiments of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions falling within the idea of the present invention belong to the protection scope of the present invention. It should be pointed out that for those of ordinary skill in the art in this technical field, several improvements and refinements made without departing from the principle of the present invention should also be regarded as within the protection scope of the present invention.

Claims

1. A filtering and recycling system for an attracting and pressure-feeding tanker truck, comprising a recycling pipeline (3), a bag filter device (1) and a cyclone separator device (2) which are connected and communicated with each other. One end of the recycling pipeline (3) is simultaneously connected and communicated with the bag filter device (1) and the cyclone separator device (2), and the other end is used for communicating with the discharge port of a storage tank (6); It is characterized in that, It further includes a flow control component, which includes a flow detection element (41), a control element (42) and a valve (43). The valve (43) is arranged on the recovery pipeline (3) and is located at one end close to the storage tank (6). The flow detection element (41) is arranged on the recovery pipeline (3) for detecting the material flow in the recovery pipeline (3). The output end of the flow detection element (41) is electrically connected to the input end of the control element (42), and the output end of the control element (42) is electrically connected to the input end of the valve (43). The control element (42) controls the opening and closing of the valve (43) according to the detection signal of the flow detection element (41). The valve (43) is a pneumatic valve, which is communicated with an external air source through an air pipe. An electrically controlled air valve is arranged on the air pipe, and the output end of the control element (42) is electrically connected to the input end of the electrically controlled air valve. The control element (42) controls the opening and closing of the electrically controlled air valve according to the detection signal of the flow detection element (41), and further controls the on-off of the air pipe, so as to open or close the pneumatic valve. The flow detection element (41) is a powder flow detector.

2. The filtering and recycling system of the suction and pressure delivery tanker according to claim 1, wherein, The control element (42) is a relay or a single-chip microcomputer.

3. The filtering and recycling system of the suction and delivery tanker according to claim 1, characterized in that, The flow detection element (41) is electrically connected to the control element (42) through a shielded cable.

4. The filtering and recovery system of the suction and pressure feeding tanker as claimed in claim 1, wherein the recovery pipeline (3) includes a discharge port end pipe (31), a discharge pipe (32) and a connecting pipe (33). One end of the discharge port end pipe (31) is communicated with the storage tank (6), and the other end is provided with a first flange seat (51). One end of the discharge pipe (32) is communicated with both the bag filter device (1) and the cyclone separator device (2), and the other end is provided with a second flange seat (52). Both ends of the connecting pipe (33) are respectively provided with a first connecting flange (53) and a second connecting flange (54) adapted to the first flange seat (51) and the second flange seat (52). The first connecting flange (53) is connected to the first flange seat (51), and the second connecting flange (54) is connected to the second flange seat (52).

5. The filtering and recovery system of the suction and pressure feeding tanker as claimed in claim 4, wherein the connecting pipe (33) is a copper wire hose, and the first flange seat (51), the second flange seat (52), the first connecting flange (53) and the second connecting flange (54) are all made of steel.

6. The filtering and recovery system of the suction and pressure feeding tanker as claimed in claim 4, wherein the valve (43) is arranged at the first flange seat (51).

7. The filtering and recovery system of the suction and pressure feeding tanker as claimed in claim 4, wherein the flow detection element (41) is arranged at the second flange seat (52).

8. An attracting and pressure-feeding tanker truck, comprising an automotive chassis and a storage tank (6), a vacuum feeding system and a positive pressure discharging system provided on the automotive chassis; characterized in that, It further includes a filtering and recycling system as described in any one of claims 1-7, and the filtering and recycling system is connected to the discharge port of the storage tank (6) for filtering and recycling the materials drawn out with air from the storage tank (6) during the vacuum feeding process.

Images