Sand storage tank, control system and material level detection method

Abstract

The invention relates to a sand storage tank, a control system and a material level detection method. The control system comprises a high material level instrument and / or a low material level instrument, an input interface, a direct-current driving circuit, a first output interface, an alternating-current control circuit, an alternating-current power supply circuit, a second output interface, a third output interface and a fourth output interface, wherein the input interface is connected with an isolating circuit and is connected into an MCU (Microprogrammed Control Unit); the MCU is electrically connected with the direct-current driving circuit and the first output interface in sequence; the AC control circuit is connected with a stirring motor and / or a heating rod through a second output interface, the AC-AC power supply circuit supplies power to the MCU, and the RS232 / 485 communication circuit and the temperature adjusting knob are respectively connected to the MCU.

Description

Technical Field

[0001] The invention belongs to the technical field of sandblasting and shot blasting, and in particular relates to a sand storage tank and a control system, and a material level detection method. Background Art

[0002] In the field of sandblasting, abrasives are prone to bridge and agglomerate, causing blockage of equipment and pipelines, causing poor operation of equipment, thus affecting production and causing waste of abrasives; there is also the problem of uneven heating of abrasives in the sand storage bin.

[0003] The existing heating technology directly inserts the heating rod into the sand storage bin, which results in uneven heating. The abrasive in contact with the heating rod has a high temperature, but has no effect on the abrasive far away from the heating rod. Summary of the invention

[0004] In view of the deficiencies of the above-mentioned prior art, the technical problem to be solved by the present invention is to provide a sand storage tank and control system and a material level detection method with vibration bridge breaking technology, which can heat the abrasive in the sand storage bin evenly through heating + stirring + vibration, make the abrasive flow stably and smoothly, and thus prevent the abrasive from bridging.

[0005] The technical solution of the present invention is the control system of the sand storage tank, which is special in that the control system includes a high level meter and / or a low level meter and an input interface connected through an external start and stop signal, the input interface is connected to an isolation circuit connected to the MCU, a DC drive circuit electrically connected to the MCU in sequence, a first output interface connected to a sand lowering valve and / or a vibration valve, the MCU is electrically connected to an AC control circuit, the AC control circuit is connected to an AC power supply circuit, the AC control circuit is connected to a stirring motor and / or a heating rod through a second output interface, the AC-AC power supply circuit supplies power to the MCU, and the RS232 / 485 communication circuit and the temperature adjustment knob are respectively connected to the MCU.

[0006] Preferably: the sand storage tank comprises a tank body, a cover body for sealing the tank body, a sand bin arranged in the tank body, a lower sand valve penetrating the tank wall is arranged at the bottom of the sand bin, a through hole is opened in the center of the cover body, a sand inlet penetrating the cover body is arranged on the side of the through hole, a sleeve is installed in the through hole, a motor is installed in the sleeve located outside the cover body, the output shaft of the motor is connected to a stirring mechanism extending into the tank body, a number of heating rods are evenly distributed between the sand bin and the inner wall of the tank body, a vibrator is arranged on the outer wall of the sand bin, and a high material level meter and a low material level meter are respectively arranged on the top and bottom of the sand bin which radially penetrate the tank wall.

[0007] Preferably, the tank body is made of carbon steel sandwiched with glass fiber insulation cotton to prevent heat loss too quickly.

[0008] Preferably, the sand bin is composed of a columnar portion at the top and a conical portion at the bottom; the vibrator is arranged on the outer wall of the conical portion of the sand bin; the high level meter and the low level meter are arranged at the top and the bottom of the columnar portion of the sand bin respectively.

[0009] Preferably, the vibrator strengthens the vibration of the abrasive in the sand bin through periodic vibration, thereby further preventing the abrasive from bridging.

[0010] Preferably, the abrasive is stored in a sand bin, and the temperature range is set from 0°C to 60°C by a control system, and the heat energy generated by the heating rod is controlled to dry the abrasive in the sand bin, and the heat is transferred to the abrasive in the sand bin through the sand bin made of carbon steel with good thermal conductivity.

[0011] Another technical solution of the present invention is a material level detection method of the sand storage tank, which is special in that it includes the following steps:

[0012] ⑴The control system starts by controlling the external start-stop signal and begins to add sand;

[0013] ⑵The abrasive enters the sand bin through the sand inlet. The high level meter senses it and then gives an alarm, stops adding sand, and proceeds to the next step;

[0014] ⑶ Determine whether the material level is normal, if yes, proceed to step ⑷ and step ⑻ respectively; if no, proceed to step ⑷ and step ⑽ respectively;

[0015] ⑷ Determine whether sand is produced? If not, return to step ⑶; if yes, proceed to the next step;

[0016] ⑸ During sandblasting, the lower sand valve is opened and the abrasive in the sand bin flows out through the lower sand valve;

[0017] (6) When the abrasive reaches the lower limit, the low material level meter senses it and sounds an alarm, and starts adding sand;

[0018] ⑺The vibration valve is opened;

[0019] ⑻The stirring mechanism starts stirring operation under the drive of the motor, and the abrasive is evenly heated by periodically stirring and turning the abrasive. The stirring of the abrasive further prevents bridging and agglomeration;

[0020] ⑼ The abrasive is stored in the sand bin. The temperature is set by the control system, and the heating rod is controlled to generate heat to dry the abrasive in the sand bin. The heat is transferred to the abrasive in the sand bin through the sand bin made of carbon steel with good thermal conductivity;

[0021] ⑽The sand lowering valve is closed;

[0022] ⑾The vibration valve is closed;

[0023] ⑿Heating stops;

[0024] ⒀Stirring stops;

[0025] ⒁End.

[0026] Preferably, the temperature setting range in step (9) is 0°C to 60°C.

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[0028] (1) The present invention realizes uniform heating of the abrasive in the sand storage tank, generates vibration, prevents the abrasive from bridging and agglomerating, ensures smooth production, and reduces abrasive waste.

[0029] (2) The integrated control system of the present invention only needs to control the start and stop externally, and does not require additional control, which is simple and convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the top view of the sand storage tank of the present invention;

[0031] Figure 2 yes Figure 1 CC section view;

[0032] Figure 3 It is a three-dimensional diagram of the sand storage tank of the present invention;

[0033] Figure 4 It is a circuit block diagram of the sand storage tank control system of the present invention;

[0034] Figure 5 It is a flow chart of the material level detection method of the sand storage tank of the present invention.

[0035] Main component symbols:

[0036] Tank 1 Sand Warehouse 2 Heating rod 3 Vibrator 4 Sand valve 5 Motor 6 High level meter 7 Low level meter 8 Stirring mechanism 9 Sand inlet 10 DETAILED DESCRIPTION

[0037] The present invention will be further described below in conjunction with the accompanying drawings:

[0038] See also Figures 1 to 3 As shown, the sand storage tank device includes a tank body 1, a cover body for sealing the tank body 1, a sand bin 2 arranged in the tank body 1, the sand bin 2 is composed of a column part at the top and a conical part at the bottom, the conical bottom of the conical part is provided with a lower sand valve 5 that passes through the tank wall, a through hole is opened in the center of the cover body, a sand inlet 10 that passes through the cover body is provided on the side of the through hole, a sleeve is installed in the through hole, a motor 6 is installed in the sleeve located outside the cover body, the output shaft of the motor 6 is connected to a stirring mechanism 9 that extends into the tank body 1, a number of heating rods 3 are evenly distributed between the sand bin 2 and the inner wall of the tank body 1, a vibrator 4 is provided on the outer wall of the conical part of the sand bin 2, a high material level meter 7 and a low material level meter 8 are provided on the top and bottom of the tank body 1, respectively, and a control system.

[0039] The tank body 1 is composed of carbon steel sandwiched with glass fiber insulation wool.

[0040] The vibrator 4 strengthens the vibration of the abrasive in the sand bin 2 through periodic vibration, and further prevents the abrasive from bridging.

[0041] See also Figure 4 As shown, the control system includes a high level meter and / or a low level meter and an input interface connected through an external start and stop signal, an input interface connected to an isolation circuit connected to an MCU, a DC drive circuit electrically connected to the MCU in sequence, a first output interface connected to a sand lowering valve and / or a vibration valve, the MCU is electrically connected to an AC control circuit, the AC control circuit is connected to an AC power supply circuit, the AC control circuit is connected to a stirring motor and / or a heating rod through a second output interface, the AC-AC power supply circuit supplies power to the MCU, and the RS232 / 485 communication circuit and a temperature adjustment knob are respectively connected to the MCU.

[0042] See also Figure 5 As shown, the material level detection method of the sand storage tank includes the following steps:

[0043] ⑴The control system starts by controlling the external start-stop signal and begins to add sand;

[0044] ⑵The abrasive enters the sand bin through the sand inlet. The high level meter senses it and then gives an alarm, stops adding sand, and proceeds to the next step;

[0045] ⑶ Determine whether the material level is normal, if yes, proceed to step ⑷ and step ⑻ respectively; if no, proceed to step ⑷ and step ⑽ respectively;

[0046] ⑷ Determine whether sand is produced? If not, return to step ⑶; if yes, proceed to the next step;

[0047] ⑸ During sandblasting, the lower sand valve is opened and the abrasive in the sand bin flows out through the lower sand valve;

[0048] (6) When the abrasive reaches the lower limit, the low material level meter senses it and sounds an alarm, and starts adding sand;

[0049] ⑺The vibration valve is opened;

[0050] ⑻The stirring mechanism starts stirring operation under the drive of the motor, and the abrasive is evenly heated by periodically stirring and turning the abrasive. The stirring of the abrasive further prevents bridging and agglomeration;

[0051] ⑼ The abrasive is stored in the sand bin. The temperature range is set by the control system at 0℃~60℃. The heating rod is controlled to generate heat to dry the abrasive in the sand bin. The heat is transferred to the abrasive in the sand bin through the sand bin made of carbon steel with good thermal conductivity.

[0052] ⑽The sand lowering valve is closed;

[0053] ⑾The vibration valve is closed;

[0054] ⑿Heating stops;

[0055] ⒀Stirring stops;

[0056] ⒁End.

[0057] The above description is only a preferred embodiment of the present invention. All equivalent changes and modifications made within the scope of the claims of the present invention should fall within the scope of the claims of the present invention.

Claims

1. A control system for a sand storage tank, characterized in that: The control system includes a high material level meter and / or a low material level meter and an input interface connected through an external start and stop signal, an input interface connected to an isolation circuit connected to an MCU, a DC drive circuit electrically connected in sequence to the MCU, a first output interface connected to a sand lowering valve and / or a vibration valve, the MCU is electrically connected to an AC control circuit, the AC control circuit is connected to an AC power supply circuit, the AC control circuit is connected to a stirring motor and / or a heating rod through a second output interface, the AC-AC power supply circuit supplies power to the MCU, and an RS232 / 485 communication circuit and a temperature adjustment knob are respectively connected to the MCU.

2. The control system of the sand storage tank according to claim 1, characterized in that: The sand storage tank includes a tank body, a cover body for sealing the tank body, a sand bin arranged in the tank body, a sand lowering valve penetrating the tank wall is arranged at the bottom of the sand bin, a through hole is opened in the center of the cover body, a sand inlet penetrating the cover body is arranged on the side of the through hole, a sleeve is installed in the through hole, a motor is installed in the sleeve located outside the cover body, the output shaft of the motor is connected to a stirring mechanism extending into the tank body, a number of heating rods are evenly distributed between the sand bin and the inner wall of the tank body, a vibrator is arranged on the outer wall of the sand bin, and a high material level meter and a low material level meter are respectively arranged on the top and bottom of the sand bin which radially penetrate the tank wall.

3. The control system of the sand storage tank according to claim 2, characterized in that: The tank body is made of carbon steel sandwiched with glass fiber insulation wool to prevent heat from being lost too quickly.

4. The control system of the sand storage tank according to claim 2, characterized in that: The sand bin is composed of a column part at the top and a cone part at the bottom; the vibrator is arranged on the outer wall of the cone part of the sand bin; the high material level meter and the low material level meter are arranged on the top and the bottom of the sand bin column part respectively.

5. The control system of the sand storage tank according to claim 1, characterized in that: The vibrator strengthens the vibration of the abrasive in the sand bin through periodic vibration, and further prevents the abrasive from bridging.

6. The control system of the sand storage tank according to claim 1, characterized in that: Abrasives are stored in sand bins. The temperature range is set from 0°C to 60°C through the control system. The heat energy generated by the heating rod is controlled to dry the abrasives in the sand bin. The heat is transferred to the abrasives in the sand bin through the sand bin made of carbon steel with good thermal conductivity.

7. A method for detecting the material level of a sand storage tank, characterized in that: The following steps are involved: ⑴The control system starts by controlling the external start-stop signal and begins to add sand; ⑵The abrasive enters the sand bin through the sand inlet. The high level meter senses it and then gives an alarm, stops adding sand, and proceeds to the next step; ⑶ Determine whether the material level is normal, if yes, proceed to step ⑷ and step ⑻ respectively; if no, proceed to step ⑷ and step ⑽ respectively; (4) Determine whether sand is produced? If not, return to step (3); If yes, proceed to the next step; ⑸ During sandblasting, the lower sand valve is opened and the abrasive in the sand bin flows out through the lower sand valve; (6) When the abrasive reaches the lower limit, the low material level meter senses it and sounds an alarm, and starts adding sand; ⑺The vibration valve is opened; ⑻The stirring mechanism starts stirring operation under the drive of the motor, and the abrasive is evenly heated by periodically stirring and turning the abrasive. The stirring of the abrasive further prevents bridging and agglomeration; ⑼ The abrasive is stored in the sand bin. The temperature is set by the control system, and the heating rod is controlled to generate heat to dry the abrasive in the sand bin. The heat is transferred to the abrasive in the sand bin through the sand bin made of carbon steel with good thermal conductivity; ⑽The sand lowering valve is closed; ⑾The vibration valve is closed; ⑿Heating stops; ⒀Stirring stops; ⒁End.

8. The material level detection method of the sand storage tank according to claim 7, characterized in that: The setting temperature range in step (9) is 0°C to 60°C.

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