Vacuum feeding system

Abstract

The utility model discloses a vacuum feeding system which comprises a negative pressure fan, a plurality of vacuum feeders and at least one feeder. The negative pressure fan is respectively connected with the plurality of vacuum feeders through pipelines, and the feeder is connected with one or more vacuum feeders through a pipeline; each vacuum feeder is provided with a pneumatic valve and further comprises an air seal machine and a pulse controller. The negative pressure fan, the air seal machine, the pulse controller and the pneumatic valve are connected through an interlocking control circuit; the interlocking control circuit is used for starting the negative pressure fan, the pulse controller, any air seal machine and the pneumatic valve corresponding to the started air seal machine; when any air seal machine and the corresponding pneumatic valve are started, the other air seal machines and the other pneumatic valves are in a locked state; and closing the negative pressure fan, the pulse controller, any air seal machine and the pneumatic valve corresponding to the closed air seal machine.

Description

TECHNICAL FIELD

[0001] The embodiment of the utility model relates to the field of automation technology and the field of negative electrode material production, and particularly relates to a vacuum feeding system. BACKGROUND

[0002] At present, the vacuum feeding system mainly corresponds one vacuum feeder by one vortex fan. When the system works, the specified button needs to be manually controlled to open the fan, pulse (controller), air lock, and pneumatic ball valve according to the specified order. This method cannot prevent errors, for example, the corresponding pneumatic ball valve cannot be opened if the corresponding air lock is not opened, and the fan cannot be started if the air lock and the ball valve are not opened. Such a system requires higher operation of employees, and employees are prone to misoperation; whether the material is blocked or the valve is opened can only be determined by manual on-site judgment, and the system cannot provide early warning when an abnormality occurs, and the system needs to be repaired after the material is seriously blocked, which affects the efficiency; one fan corresponds to one vacuum feeder, the equipment utilization rate is low, and the operation cost is high; the devices such as the fan, pulse, air lock, and pneumatic ball valve have no interlocking when starting, which increases the probability of misoperation of the running equipment.

[0003] In view of the above-mentioned problem of manually judging the blocking of material or the action of valve, the PLC and the touch screen can be used to uniformly control and collect signals, the PLC can be used to control the relay to drive the control of the fan, pulse, air lock, and valve, and the PLC can be used to receive the feedback signals of the valve, so as to determine whether the equipment is running normally, and the alarm or intervention action is prompted when the equipment is abnormal. The defects of the scheme are as follows: one PLC and one touch screen are installed for each set of equipment, the investment cost is high; if a fault occurs, the maintenance requirement is high, the maintenance cost is high; because it is a precision electrical component, the operation condition is high, and it is not suitable for use in the production site of negative electrode material which is prone to dust.

[0004] In summary, the defects of the vacuum feeding system include that one fan corresponds to one vacuum feeder, the equipment utilization rate is low, and the operation cost is high; the devices such as the fan, pulse, air lock, and pneumatic ball valve have no interlocking when starting, which increases the probability of misoperation of the running equipment; the PLC and the human-machine touch screen system are used for control, the investment cost is high, and the installation is complex; if a fault occurs, the maintenance requirement is high, the maintenance cost is high, and the efficiency is affected; and it is not suitable for use in the production site of negative electrode material. UTILITY MODEL CONTENT

[0005] The utility model provides a kind of vacuum feeding system to achieve the purpose of solving at least one defect in prior art.

[0006] The embodiment of the utility model provides a kind of vacuum feeding system, comprising:

[0007] Negative pressure fan, multiple vacuum feeders, at least one feeding device;

[0008] The negative pressure fan is connected with a plurality of the vacuum feeders through pipelines, and one of the feeders is connected with one or more of the vacuum feeders through a pipeline;

[0009] Each of the vacuum feeders is provided with a pneumatic valve, and each of the vacuum feeders further comprises an air lock and a pulse controller;

[0010] The negative pressure fan, the air lock, the pulse controller and the pneumatic valve are connected through the interlocking control circuit;

[0011] The interlocking control circuit is used for:

[0012] starting the negative pressure fan, the pulse controller, any of the air locks and the pneumatic valve corresponding to the started air lock;

[0013] When any of the air locks and the corresponding pneumatic valve is started, the remaining air locks and pneumatic valves are in a locked state;

[0014] The negative pressure fan, the pulse controller, any of the air locks and the pneumatic valve corresponding to the closed air lock are closed.

[0015] Optionally, a plurality of air supplement valves and a controller are further included;

[0016] Each of the vacuum feeders is provided with one of the air supplement valves;

[0017] The air supplement valves and the controller are connected with the interlocking control circuit;

[0018] The controller is used for starting the air supplement valve corresponding to the started vacuum feeder when the pressure of the started vacuum feeder is less than a preset threshold.

[0019] Optionally, a blockage discharge valve is further included, and the blockage discharge valve is connected with the pipeline.

[0020] Optionally, the controller is a programmable negative pressure instrument.

[0021] Optionally, the feeder is provided with a dust collection suction port at a feeding port.

[0022] Optionally, a running indicator light group, a fault indicator light group and a pneumatic valve action indicator light group are further included;

[0023] The running indicator light group, the fault indicator light group and the pneumatic valve action indicator light group are connected with the interlocking control circuit.

[0024] The operation indicator lamp group is used for indicating the operation state of the negative pressure fan and the air lock, the fault indicator lamp group is used for indicating the fault state of the negative pressure fan and the air lock, and the pneumatic valve action indicator lamp group is used for indicating the action state of the pneumatic valve.

[0025] Optionally, the range of the programmable negative pressure instrument is 0 to -100 Kpa.

[0026] Optionally, one double-constant-on start button is arranged for one vacuum loader.

[0027] The double-constant-on start button is used in the interlocking control circuit for:

[0028] closing the power supply circuit of the negative pressure fan and the power supply circuit of the air lock corresponding to the vacuum loader.

[0029] When the power supply circuit of the air lock is closed, the power supply circuit of the pneumatic valve corresponding to the started air lock is turned on.

[0030] Optionally, one stop button is arranged in the interlocking control circuit.

[0031] The double-constant-on start button is used in the interlocking control circuit for:

[0032] disconnecting the power supply circuit of the negative pressure fan and the power supply circuit of any air lock.

[0033] When the power supply circuit of the air lock is disconnected, the power supply circuit of the pneumatic valve corresponding to the stopped air lock is disconnected.

[0034] Optionally, an air pressure gauge is further included.

[0035] The electric contact of the air pressure gauge is arranged in the interlocking control circuit, and when the electric contact is disconnected, the negative pressure fan, the pulse controller, any air lock and the pneumatic valve corresponding to the closed air lock are closed.

[0036] The air pressure gauge is used for measuring the pressure of compressed air, and the compressed air is used for driving the pneumatic valve.

[0037] Compared with the prior art, the vacuum feeding system has the advantages that: the system is provided with one negative pressure fan matched with multiple vacuum feeders, which can save system cost compared with one negative pressure fan matched with one vacuum feeder; the system is provided with an interlocking control circuit, which can realize synchronous starting of the negative pressure fan and a specified vacuum feeder, and when one vacuum feeder starts working, the remaining vacuum feeders are in a locked state, that is, when the working vacuum feeder stops, the remaining vacuum feeders can be controlled to start, thereby effectively preventing the problem of equipment failure caused by personnel misoperation. BRIEF DESCRIPTION OF DRAWINGS

[0038] Figure 1 is a structure block diagram of the vacuum feeding system in the embodiment;

[0039] Figure 2 is a control circuit principle diagram of the air lock in the embodiment;

[0040] Figure 3 is a control circuit principle diagram of the pneumatic valve in the embodiment;

[0041] Figure 4 is an electric cabinet schematic diagram in the embodiment. DETAILED DESCRIPTION

[0042] The utility model will be further described in detail below in combination with the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the utility model, and not to limit the utility model. In addition, it should be noted that, in order to facilitate the description, only the part related to the utility model is shown in the drawings, not all structures.

[0043] Figure 1 is a structure block diagram of the vacuum feeding system in the embodiment, referring to Figure 1 , the vacuum feeding system comprises:

[0044] a negative pressure fan 100, multiple vacuum feeders (200-1~200-3), at least one feeder (300-1~300-3);

[0045] the negative pressure fan 100, the vacuum feeder and the feeder are connected with each other through pipelines;

[0046] each vacuum feeder is provided with one pneumatic valve (400-1~400-3), and each vacuum feeder further comprises an air lock and a pulse controller.

[0047] In the scheme, the negative pressure fan 100 is connected with multiple vacuum feeders (200-1~200-3) through pipelines respectively, and one feeder is connected with one or multiple vacuum feeders through pipelines.

[0048] In the scheme, one feeder can be configured to cooperate with multiple vacuum feeders, or multiple feeders can be configured to cooperate with multiple vacuum feeders, wherein the number of feeders can be different from the number of vacuum feeders.

[0049] For example, Figure 1 In the scheme, the negative pressure fan 100 is connected to the vacuum feeders 200-1 to 200-3 through pipelines, the feeder 300-1 is connected to the vacuum feeder 200-1 through a pipeline, the feeder 300-2 is connected to the vacuum feeder 200-2 through a pipeline, and the feeder 300-3 is connected to the vacuum feeder 200-3 through a pipeline.

[0050] In the scheme, the negative pressure fan 100 is used to generate negative pressure to realize the conveying of materials in the vacuum feeding system.

[0051] After the negative pressure fan is started, a strong negative pressure is generated in the vacuum feeding system, and a negative pressure area is formed at the suction port of each vacuum feeder. The materials are sucked into the conveying pipeline under the action of the negative pressure (from the feeder).

[0052] In the scheme, the vacuum feeder can be configured with corresponding functions according to requirements. For example, the vacuum feeder can be configured with a filter to have the function of filtering materials.

[0053] In the scheme, the air lock is mainly composed of an impeller, a shell, a sealing element, etc. It is used to convey materials to the discharge port of the vacuum feeder through the rotation of the impeller, and forms a seal between the impeller and the shell to prevent air leakage. The air lock in the scheme can use a commercially available air lock, which is not limited here.

[0054] In the scheme, the pulse controller can be used to send a signal when the pressure on the surface of the filter reaches a certain value, to start the backflushing device (a function provided by the device, which is a conventional setting in the field, and will not be described here) to blow off the materials attached to the filter, restore the air permeability of the filter, and ensure the continuous and efficient operation of the device.

[0055] The backflushing time interval parameter, pulse width parameter, backflushing pressure parameter, etc. of the pulse controller can be pre-configured, so that the pulse controller automatically operates according to the pre-set parameters after being started. This is a conventional technical means in the field, and will not be described here.

[0056] In the scheme, the materials processed by the vacuum feeding system are not limited, for example, the materials can be powder materials such as graphite negative materials and silicon-carbon negative materials.

[0057] In the scheme, the negative pressure fan, the air lock, the pulse controller, and the pneumatic valve are connected through an interlocking control circuit.

[0058] The interlocking control circuit is used for:

[0059] starting the negative pressure fan, the pulse controller, any air lock and the pneumatic valve corresponding to the started air lock;

[0060] locking the rest of the air locks and the pneumatic valves when any air lock and the corresponding pneumatic valve are started;

[0061] stopping the negative pressure fan, the pulse controller, any air lock and the pneumatic valve corresponding to the stopped air lock.

[0062] In the scheme, based on the interlocking control circuit, the negative pressure fan, the pulse controller and any air lock are started synchronously, and the interlocking control between different air locks is realized, i.e. only one air lock can be opened at the same time, and when another air lock is opened, the other air locks must be closed.

[0063] In the scheme, when the air lock is started, the pneumatic valve is linked to the air lock, and when the air lock is started, the corresponding pneumatic valve is started.

[0064] In the scheme, the specific circuit structure of the interlocking control circuit is not limited, which can be set according to the demand.

[0065] Figure 2 is the air lock control circuit principle diagram in the embodiment, Figure 3 is the pneumatic valve control circuit principle diagram in the embodiment, for reference Figure 2 and Figure 3 For example, in an implementable scheme, the vacuum feeding system is set to include three vacuum feeders, each vacuum feeder is configured with an air lock and a pneumatic valve, and the interlocking control circuit can be set as follows:

[0066] The motor M1 of the negative pressure fan, the air lock motors M2-M4 are connected with the power line, the star-delta relay circuit is arranged for the motor M1, and the star-delta relay circuit includes the relays KM1, KM2, KM3, the time relay KT, the thermal relay FR1 and the emergency stop switch SB2.

[0067] The starting button S1, the air lock relay KM-J1 and the thermal relay FR2 are connected in series in the first air lock control branch;

[0068] The starting button S2, the air lock relay KM-J2 and the thermal relay FR3 are connected in series in the second air lock control branch;

[0069] The starting button S3, the air lock relay KM-J3 and the thermal relay FR4 are connected in series in the third air lock control branch;

[0070] The first, second and third control branches of the air lock and the star-delta relay circuit are connected in parallel.

[0071] In an example, the working process of the air lock control circuit includes:

[0072] When the start button S1, S2 or S3 is actuated, the contacts in the star-delta relay circuit corresponding to the start button S1-S3, and the normally open contact of the air lock relay KM-J1, the normally open contact of the air lock relay KM-J2 or the normally open contact of the air lock relay KM-J3 are closed.

[0073] At the same time, the relay KM1, the relay KM3 and the time relay KT are powered on, the normally open contact of the relay KM1 is closed, the normally open contact of the relay KM1 forms a self-locking, the normally closed contact of the relay KM2 and the relay KM3 forms a mutual locking, the relay KM1, the relay KM3 and the motor M1 form a Y-type connection.

[0074] After a period of operation, the time relay KT and the normally closed contact of the relay KM2 are opened, and the normally open contact is closed, the relay KM1, the relay KM2 and the motor M1 form a delta-type connection.

[0075] When the relay KM1 is powered on, the pulse controller 500 is started.

[0076] When the start button S1 is actuated, the normally open contact of the air lock relay KM-J1 is closed, the normally closed contact is opened, the first air lock control branch is turned on, and the second and third air lock control branches are disabled.

[0077] When the normally open contact of the air lock relay KM-J1 is closed, the normally open contact of the relay KM-K1 is closed, the normally closed contact is opened, the pneumatic valve 400-1 is actuated, and the relays KM-K2 and KM-K3 are disabled.

[0078] When the start button S2 is actuated, the normally open contact of the air lock relay KM-J2 is closed, the normally closed contact is opened, the second air lock control branch is turned on, and the first and third air lock control branches are disabled.

[0079] When the normally open contact of the air lock relay KM-J2 is closed, the normally open contact of the relay KM-K2 is closed, the normally closed contact is opened, the pneumatic valve 400-2 is actuated, and the relays KM-K1 and KM-K3 are disabled.

[0080] When the start button S3 is actuated, the normally open contact of the damper relay KM-J3 is closed, the normally closed contact is opened, the third damper control branch is turned on, and the first and second damper control branches are disabled.

[0081] When the normally open contact of the damper relay KM-J3 is closed, the normally open contact of the relay KM-K3 is closed, the normally closed contact is opened, the pneumatic valve 400-3 is actuated, and the relays KM-K1 and KM-K1 are disabled.

[0082] When the thermal relay FR2, FR3 or FR4 is actuated, i.e., the corresponding damper is faulty, the closed contact of the corresponding start button is opened, and the negative pressure fan and the damper stop running. When the thermal relay FR1 or the emergency stop switch SB1 is actuated, the negative pressure fan and the damper stop running.

[0083] For example, in the present scheme, a plurality of stop buttons can be configured, for example, stop button SS1, stop button SS2, stop button SS3, stop button SS1 is used for stopping the first damper and the negative pressure fan, stop button SS2 is used for stopping the second damper and the negative pressure fan, and stop button SS3 is used for stopping the third damper and the negative pressure fan.

[0084] The present embodiment proposes a vacuum feeding system, which is provided with one negative pressure fan cooperating with a plurality of vacuum feeders. Compared with using one negative pressure fan cooperating with one vacuum feeder, the system can save system cost.

[0085] The system in the present scheme is provided with an interlocking control circuit. The interlocking control circuit can be used to realize the synchronous start of the negative pressure fan and a specified vacuum feeder, and at the same time, when one vacuum feeder starts working, the remaining vacuum feeders are in a locked state, i.e., when the working vacuum feeder stops, the remaining vacuum feeders can be controlled to start, thereby effectively preventing the problem of equipment failure caused by personnel misoperation.

[0086] In Figure 1 Based on the scheme shown, in an implementable scheme, the vacuum feeding system further comprises a plurality of air supplement valves and a controller.

[0087] Each vacuum feeder is provided with one air supplement valve.

[0088] The air supplement valve and the controller are connected to the interlocking control circuit.

[0089] The controller is used to control the air supplement valve corresponding to the started vacuum feeder to start when the pressure of the started vacuum feeder is less than a preset threshold.

[0090] In the scheme, the controller can be specifically configured to detect the (negative) pressure in the pipeline, and when the negative pressure is less than a preset threshold, the air supplement valve corresponding to the started vacuum feeder is started.

[0091] In the scheme, the air supplement valve is used to maintain the stable air pressure in the vacuum feeding system, and when the air consumption of the pneumatic equipment increases or the air source pressure decreases, the air supplement valve is opened to supplement external air and ensure the normal operation of the pneumatic equipment.

[0092] In the scheme, based on the controller and the air supplement valve, when the vacuum feeding system occurs normal blockage, the air supplement valve is controlled to act to discharge the blockage, so that automatic intervention to the normal blockage can be realized, and the purpose of non-stop of the vacuum feeding system and non-influence on normal operation can be achieved.

[0093] For example, in the scheme, the controller can adopt PLC, intelligent pressure gauge, etc., and preferably, to save cost, the controller adopts programmable negative pressure instrument (intelligent pressure gauge).

[0094] For example, in the scheme, the model of the intelligent pressure gauge can be selected according to requirements, for example, the range of the intelligent pressure gauge can be 0~-100Kpa.

[0095] Reference Figure 2 In the scheme, the intelligent pressure gauge 601 and the air supplement valve (700-1~700-3) can be connected to the interlocking control circuit in the following manner.

[0096] The electrical contacts of the intelligent pressure gauge 601, the air supplement valve 700-1, the air supplement valve 700-2 and the air supplement valve 700-3 are connected to the power line in parallel through a transformer.

[0097] The working process of the intelligent pressure gauge 601 and the air supplement valve includes:

[0098] When the normally open contact of the air lock relay KM-J1 is closed, the normally open contact of the relay KM-K1 is closed, the normally closed contact is disconnected, the relay KM-K2 and the relay KM-K3 are disabled, and if the electrical contact KA-D is closed, the power circuit in which the air supplement valve 700-1 is located is closed, and the air supplement valve 700-1 acts.

[0099] When the normally open contact of the air lock relay KM-J2 is closed, the normally open contact of the relay KM-K2 is closed, the normally closed contact is disconnected, the relay KM-K1 and the relay KM-K3 are disabled, and if the electrical contact KA-D is closed, the power circuit in which the air supplement valve 700-2 is located is closed, and the air supplement valve 700-2 acts.

[0100] When the normally open contact of the air lock relay KM-J3 is closed, the normally open contact of the relay KM-K3 is closed, the normally closed contact is opened, the relays KM-K1 and KM-K2 are disabled, and if the electric contact KA-D is closed, the power circuit in which the air supply valve 700-3 is located is closed, and the air supply valve 700-3 operates.

[0101] On the basis of any of the preceding solutions, in an implementable solution, the vacuum feeding system further comprises a blow-off valve connected to the pipeline (for connecting the negative pressure fan, the vacuum feeder and the feeder).

[0102] Illustratively, in this solution, the blow-off valve can be specifically arranged at the connection end of the negative pressure fan and the pipeline, and the blow-off valve can be manually opened or closed.

[0103] In this solution, the blow-off valve is used to change the flow size of the pipeline through the movement of the blow-off valve core when the vacuum feeder is blocked, so as to achieve the purpose of air supply and blow-off.

[0104] Illustratively, when the vacuum feeding system is configured with an intelligent pressure gauge, the blow-off valve can be manually controlled to be opened for air supply and blow-off when the intelligent pressure gauge detects that the negative pressure is less than the preset threshold for a certain length of time (for example, 5-10 seconds).

[0105] On the basis of any of the preceding solutions, in an implementable solution, the feeder is provided with a dust collection suction port.

[0106] In this solution, the purpose of arranging the integrated suction port at the feeding port is to avoid the diffusion of dust into the air during the feeding process, thereby causing harm to the workers and equipment.

[0107] On the basis of any of the preceding solutions, in an implementable solution, the vacuum feeding system further comprises a running indicator light group, a fault indicator light group and a pneumatic valve action indicator light group.

[0108] The running indicator light group, the fault indicator light group and the pneumatic valve action indicator light group are connected to the interlocking control circuit.

[0109] The running indicator light group is used for indicating the running state of the negative pressure fan and the air lock, the fault indicator light group is used for indicating the fault state of the negative pressure fan and the air lock, and the pneumatic valve action indicator light group is used for indicating the action state of the pneumatic valve.

[0110] Figure 4 is a schematic diagram of an electrical cabinet in the embodiment, and reference is made to Figure 4 In this solution, the running indicator light group, the fault indicator light group and the pneumatic valve action indicator light group can be arranged on the electrical cabinet.

[0111] The running indicator light group can include a (negative pressure) fan start indicator light, a first (damper) start indicator light, a second (damper) start indicator light, and a third (damper) start indicator light.

[0112] The fault indicator light group can include a (negative pressure) fan fault indicator light, a first (damper) fault indicator light, a second (damper) fault indicator light, and a third (damper) fault indicator light.

[0113] The pneumatic valve action indicator light group can include a first ball valve indicator light, a second ball valve indicator light, and a third ball valve indicator light.

[0114] For example, in the present scheme, the specific connection relationship of each indicator light group in the interlocking control circuit is determined according to design requirements, and the working principle is the same as that of the prior art, and the specific content will not be described in detail.

[0115] Referring to Figure 2 and Figure 4 For example, in the present scheme, control buttons can also be provided on the electric cabinet, such as a first start button (S1), a second start button (S2), a third start button (S3), a one-key stop button (SB1), and an emergency stop button (SB2).

[0116] On the basis of any of the foregoing schemes, in an implementable scheme, a vacuum feeder is configured with a double-constant-on start button.

[0117] The double-constant-on start button is used in the interlocking control circuit to:

[0118] Close the power supply circuit of the negative pressure fan and the power supply circuit of the damper corresponding to the vacuum feeder.

[0119] When the power supply circuit of the damper is closed, the power supply circuit of the pneumatic valve corresponding to the started damper is turned on.

[0120] Referring to Figure 2 The start button S1, the start button S2, and the start button S3 can be double-constant-on start buttons, and the constant-on contact of the start button can be used in cooperation with the corresponding contact of the relay KM1 and the damper, or be arranged at a specified position in the interlocking control circuit, thereby realizing the synchronous start of the negative pressure fan and the damper.

[0121] For example, in the present scheme, the control principle of the interlocking control circuit is the same as that described in the scheme shown in Figure 2 , and the specific content will not be described in detail.

[0122] On the basis of any of the foregoing schemes, in an implementable scheme, the interlocking control circuit is configured with a stop button.

[0123] The double-constant-on start button is used in the interlocking control circuit to:

[0124] The power supply circuit of the negative pressure fan and the power supply circuit of any air lock are disconnected;

[0125] When the power supply circuit of the air lock is disconnected, the power supply circuit of the pneumatic valve corresponding to the stopped air lock is disconnected.

[0126] Reference Figure 2 In the scheme, a stop button SB1 is provided, and the stop button SB1 is arranged on the main power supply circuit. When the stop button SB1 is actuated, the relays (KM-J1-KM-J3) of the negative pressure fan and the air lock are de-energized, and the relays KM-K1-KM-K3 are de-energized, thereby realizing the stop of the negative pressure fan, the air lock and the pneumatic valve.

[0127] Reference He2 and Figure 3 On the basis of any of the foregoing schemes, in an implementable scheme, the vacuum feeding system further comprises an air pressure gauge 602.

[0128] The electrical contact KA-A of the air pressure gauge 602 is arranged in the interlocking control circuit. When the electrical contact KA-A is disconnected, the negative pressure fan, the pulse controller, any air lock and the pneumatic valve corresponding to the closed air lock are closed.

[0129] In the scheme, the air pressure gauge 602 is connected to the power supply line through a transformer.

[0130] In the scheme, the pneumatic valve is set to be driven by compressed air, and the air pressure gauge 602 is set to measure the pressure of the compressed air. When the measured value of the air pressure gauge is lower than the preset (positive) pressure, it is considered that the pneumatic valve cannot be normally opened or that a material blocking will occur in the vacuum feeding pipeline, etc. At this time, the electrical contact KA-A is disconnected.

[0131] The electrical contact KA-A is arranged on the main power supply circuit. When the electrical contact KA-A is disconnected, the relays (KM-J1-KM-J3) of the negative pressure fan and the air lock are de-energized, and the relays KM-K1-KM-K3 are de-energized, thereby realizing the stop of the negative pressure fan, the air lock and the pneumatic valve.

[0132] On the basis of any of the foregoing schemes, reference Figures 1 to 4 In an implementable scheme, the vacuum feeding system can be designed based on the schemes shown in FIGS. 1-6 at the same time. Figures 1 to 4 The working principles of the schemes corresponding to each of the drawings are the same as those of the corresponding schemes described above, and the specific contents will not be described again.

[0133] In the scheme, one negative pressure fan is configured to cooperate with three vacuum feeders, one one-key starting button is configured for each vacuum feeder, the corresponding vacuum feeder can be accurately started by using the one-key starting button, intelligent pressure gauges are configured in the system, the intelligent pressure gauges are used for detecting blockage of the vacuum feeders, when blockage occurs, the electric contact of the intelligent pressure gauges is automatically connected to the control of the air supplement valve, so that the blockage is discharged, the air pressure gauges are used for detecting driving gas pressure of the pneumatic valve, when the pressure is abnormal, the electric contact of the air pressure gauges is used to close the negative pressure fan and the air lock, so as to avoid expansion of the fault, when the negative pressure fan or the air lock fails, the hot relay in the interlocking control circuit can be used to automatically close and stop the negative pressure fan and the air lock, and the equipment is reliable in operation.

[0134] The vacuum feeding system designed in the scheme is simple in structure and low in cost, can accurately start the corresponding equipment while effectively sensing abnormal signals such as blockage, misoperation and fault, automatically intervenes in air supplement and blockage discharge in advance, and the reliability of equipment operation and the timeliness of maintenance are ensured.

[0135] In the scheme, the vacuum feeding system is used for feeding of graphite negative electrode material, dust suction ports are arranged at the feeding amount of the feeder according to the characteristics that the negative electrode material is prone to dust during agglomeration and feeding, if abnormal conditions such as pipe blockage and valve closing occur during operation of the negative pressure fan, the indicator light group can be used for prompting and alarming, so that the above abnormal conditions can be effectively found by the workers, and equipment damage and production accidents caused by blockage or operation errors are prevented.

[0136] It should be noted that the above is only a preferred embodiment of the present application and the technical principle applied. Those skilled in the art will understand that the present application is not limited to the specific embodiments described herein, and those skilled in the art can make various obvious changes, re-adjustments and substitutions without departing from the protection scope of the present application. Therefore, although the present application has been described in more detail through the above embodiments, the present application is not limited to the above embodiments, and can include more other equivalent embodiments without departing from the concept of the present application, and the scope of the present application is determined by the scope of the appended claims.

Claims

1. A vacuum loading system, characterized in that, The application relates to a negative pressure feeding system. The system comprises a negative pressure fan, multiple vacuum feeders and at least one feeder. The negative pressure fan is connected to the multiple vacuum feeders through pipelines. Each vacuum feeder is equipped with a pneumatic valve. The negative pressure fan, the vacuum feeders, the pneumatic valves and the interlocking control circuit are connected. The interlocking control circuit is used to start the negative pressure fan, the pneumatic valves and the vacuum feeders. When any vacuum feeder and the corresponding pneumatic valve are started, the rest of the vacuum feeders and the pneumatic valves are locked. The interlocking control circuit is used to close the negative pressure fan, the pneumatic valves and the vacuum feeders. The system further comprises multiple air supplement valves and a controller.

2. The vacuum feed system of claim 1, wherein, Each vacuum feeder is equipped with an air supplement valve. The air supplement valves, the controller and the interlocking control circuit are connected. The controller is used to start the air supplement valve when the pressure of the started vacuum feeder is less than a preset threshold. The system further comprises a blockage valve.

3. The vacuum feed system of claim 1, wherein, The blockage valve is connected to the pipeline. The controller adopts a programmable negative pressure instrument.

4. The vacuum feed system of claim 2, wherein, The feeder is equipped with a dust collection suction port.

5. The vacuum feed system of claim 1, wherein, The system further comprises a running indicator group, a fault indicator group and a pneumatic valve action indicator group.

6. The vacuum feed system of claim 1, wherein, The running indicator group, the fault indicator group and the pneumatic valve action indicator group are connected to the interlocking control circuit. The running indicator group is used to indicate the running state of the negative pressure fan and the vacuum feeders. The fault indicator group is used to indicate the fault state of the negative pressure fan and the vacuum feeders.

7. The vacuum feed system of claim 4, wherein, The pneumatic valve action indicator group is used to indicate the action state of the pneumatic valve.

8. The vacuum feed system of claim 1, wherein, The programmable negative pressure instrument has a range of 0~-100Kpa. Each vacuum feeder is equipped with a double-constant-on start button. The double-constant-on start button is used to close the power supply circuit of the negative pressure fan and the vacuum feeders in the interlocking control circuit. When the power supply circuit of the vacuum feeder is closed, the power supply circuit of the corresponding pneumatic valve is turned on.

9. The vacuum feed system of claim 8, wherein, The interlocking control circuit is equipped with a stop button. The double-constant-on start button is used to disconnect the power supply circuit of the negative pressure fan and any vacuum feeder in the interlocking control circuit. When the power supply circuit of the vacuum feeder is disconnected, the power supply circuit of the corresponding pneumatic valve is disconnected. The system further comprises an air pressure gauge.

10. The vacuum feed system of claim 1, wherein, When the electrical contact of the air pressure gauge is disconnected, the negative pressure fan, the pneumatic valves, the vacuum feeders and the corresponding pneumatic valves are closed. The air pressure gauge is used to measure the pressure of compressed air which is used to drive the pneumatic valve. ​

Images