Online moisture detection system

Abstract

An on-line moisture detection system comprises a rack, a manipulator, a tray rack, a division belt conveyor, a waste material belt, a heating and drying device and an electronic scale, the manipulator, the tray rack, the division belt conveyor, the waste material belt, the heating and drying device and the electronic scale are installed on the rack, the manipulator is a three-axis manipulator with X, Y and Z, the waste material belt conveyor is located below the division belt conveyor, a discharging pipe of the division belt conveyor is connected to a feeding port of the waste material belt conveyor, and the heating and drying device is connected with the electronic scale. A plurality of trays can be placed on the tray rack, the heating and drying device comprises a plurality of small drying ovens, each small drying oven is internally provided with an independent heating device and a temperature controller, and the front wall of each small drying oven is provided with an automatic locking door. The system is compact in structure and can operate in a closed mode.

Description

Technical Field

[0001] The utility model relates to sample detection equipment, in particular to an online moisture detection system, belonging to the technical field of equipment. Background Technique

[0002] In the moisture detection of incoming coal samples, fine powder with a particle size of about 0.2 mm needs to be ground for moisture detection. The required sample amount is about 500 g / sample, and generally more than two samples are needed. The moisture detection uses the heating and drying method. The weights of the samples before and after drying are weighed respectively, and then the moisture of the coal sample is obtained. The initial moisture detection relied on manual operation. Manual workers put the coal sample into the heating and drying oven and take it out after a certain time. This method is highly dependent on manual labor, and the results are more likely to be interfered by humans. To avoid these defects, the industry has developed moisture detection equipment that relies on equipment, which can be carried out in a fully enclosed environment. The coal sample basically does not contact the staff, and the staff's participation is at most to operate the equipment. Such equipment is disclosed in a fully automatic moisture detector in Chinese Patent CN108051337A, and the sample transfer depends entirely on the manipulator. A kind of online sample preparation and testing system disclosed in Chinese Patent Application No. 201711206566X also involves the detection of moisture. It uses multi-stage reduction to obtain samples, and automation is achieved in sample preparation. However, the existing moisture testing systems have the following problems: First, the heating and drying ovens are relatively large, and the number of samples that can be heated and dried at one time is large (generally up to a dozen or dozens). This method can meet the detection needs of a large number of samples. In actual detection, the number of samples to be detected varies. When the number of samples is small, using such equipment consumes a large amount of energy. Summary of the Invention

[0003] The purpose of the utility model is to overcome the above problems existing in the current moisture testing, and provide an online moisture testing system.

[0004] To achieve the purpose of the utility model, the following technical solutions are adopted: An online moisture detection system includes a frame and a manipulator, a tray rack, a reduction belt conveyor, a waste belt, a heating and drying device, and an electronic scale installed on the frame. The manipulator is a three-axis manipulator with X, Y, and Z axes. The waste belt conveyor is located below the reduction belt conveyor. The discharge pipe of the reduction belt conveyor is connected to the feed port of the waste belt conveyor. Multiple trays can be placed on the tray rack. The heating and drying device is composed of multiple small ovens. Each small oven is equipped with an independent heating device and a temperature controller. An automatic locking door is installed on the front wall of each small oven.

[0005] Furthermore, a nitrogen gas pipeline is connected to each small oven, and a valve is installed on the nitrogen gas pipeline.

[0006] Furthermore, the automatic locking door is a hinged door. The upper end of the hinged door is hinged to the door frame of the small oven through a hinge. An electromagnet is installed on the front wall of the small oven. After the electromagnet is energized, it attracts the hinged door to close the small oven.

[0007] Furthermore, a riffle is installed at the outlet of the riffle belt conveyor. The two outlets of the riffle correspond to two receiving trays.

[0008] Furthermore, the running direction of the riffle belt conveyor is in the front-back direction. The two outlets of the riffle are distributed front and back. The two feeding trays are respectively placed on the material supporting orifice plates. The material supporting orifice plates are fixedly connected to the action end of the first rotary cylinder. The first rotary cylinder is fixedly connected to the action end of the first lifting cylinder.

[0009] Furthermore, a waste hopper is also installed on the rack. The discharge of the waste hopper is connected to the discharge end of the riffle belt conveyor. A rotary driving mechanism is installed on the waste hopper. A turning plate is fixedly connected to the output shaft of the rotary driving mechanism. Multiple sets of rotary pressing mechanisms are installed on the turning plate. The rotary pressing mechanism includes a second rotary cylinder. The output end of the second rotary cylinder is fixedly connected to a claw cylinder. There is a support block fixedly connected to the turning plate below the claw cylinder. After the manipulator puts down the tray, the edge of the tray is supported on the support block.

[0010] Furthermore, a turning plate detection induction sensor is installed on the wall of the waste hopper.

[0011] Furthermore, two trays can be placed in each small oven.

[0012] The positive and beneficial technical effects of the present utility model are as follows: This system can meet the needs of a large number of sample tests. Each small oven is independently designed. When the sample quantity is small, only some small ovens can be used to complete the test. Nitrogen is introduced into the nitrogen pipeline to prevent the weight change of the sample caused by heating and oxidation. This system has a compact structure and can operate in a closed manner. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is one of the overall schematic diagrams of the present utility model.

[0014] Figure 2 is the second overall schematic diagram of the present utility model.

[0015] Figure 3 is the schematic diagram of the cut-open waste hopper.

[0016] Figure 4 is the schematic diagram at the riffle shovel on the riffle.

[0017] Figure 5 is the schematic diagram of the principle of the hinged door. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] To more fully explain the implementation of the present utility model, implementation examples of the present utility model are provided. These implementation examples are merely elaborations of the present utility model and do not limit the scope of the present utility model.

[0019] With reference to the accompanying drawings, the present utility model is further explained in detail. The reference numerals in the drawings are as follows: 1: frame; 2: sample divider belt conveyor; 3: feed inlet; 4: reject belt conveyor; 5: first manipulator; 6: second manipulator; 7: tray rack; 8: small oven; 801: hinged door; 802: electromagnet; 9: riffle; 10: material supporting orifice plate; 11: reject hopper; 12: first rotary cylinder; 13: first lifting cylinder; 14: tray; 15: turning plate; 16: second rotary cylinder; 17: clamping jaw cylinder; 18: support block; 19: turning plate detection induction sensor; 20: turning motor; 21: left and right cylinder; 22: second lifting cylinder; 23: sample dividing shovel; 24: nitrogen pipeline; 25: spreading plate.

[0020] As shown in the accompanying drawings, an on-line moisture detection system includes a frame 1 and a manipulator, a tray rack, a sample divider belt conveyor, a reject belt, a heating and drying device, and an electronic scale installed on the frame. Multiple trays can be placed on the tray rack. A spreading plate 25 is fixedly installed above the tray rack. 14 shows the tray. The manipulator is a three-axis manipulator with X, Y, and Z axes. In this embodiment, two manipulators are used, namely the first manipulator 5 and the second manipulator 6. The two manipulators are each responsible for a part of the operation. For example, the second manipulator is responsible for taking out the tray from the tray rack, receiving the material, and then placing it on the electronic scale for weighing. The first manipulator is responsible for putting the weighed tray into the small oven, taking it out after drying, and placing it on the electronic scale for the second weighing. Then, the second manipulator discards the material after the second weighing. In this embodiment, the upper end of the tray has an edge, and the front end of the manipulator has two fork arms. When the manipulator picks up the material, the fork arms can extend under the edge. In order to ensure reliable placement in the small oven, the fork arms can be designed in a stepped shape, and the upper surface of the edge of the tray is lower than the upper surface of the fork arms.

[0021] The reject belt conveyor 4 is located below the sample divider belt conveyor 2. The discharge pipe of the sample divider belt conveyor 2 is connected to the feed inlet of the reject belt conveyor. The sample divider belt conveyor is an existing device. In this implementation, the sample divider belt conveyor uses a sample dividing shovel 23. The sample dividing shovel 23 is located above the belt. The sample dividing shovel is fixedly connected to the moving end of the second lifting cylinder. The second lifting cylinder is fixedly connected to the moving end of the left and right cylinder. The moving direction of the left and right cylinder is along the width direction of the belt. When dividing the sample, the second lifting cylinder (when located on the right side of the belt, right reference Figure 2It falls on the right side (in the figure), and the left and right cylinders drive the sample shovel to move leftward (towards the riffle divider), dividing the sample into the riffle divider. There is a riffle divider 9 installed at the outlet of the sample reduction belt conveyor 2. The two outlets of the riffle divider correspond to two receiving trays. In this embodiment, the running direction of the sample reduction belt conveyor is in the front-back direction, and the two outlets of the riffle divider are distributed front and back. The two feeding trays are respectively placed on the material supporting orifice plate 10. The material supporting orifice plate 10 is fixedly connected to the action end of the first rotating cylinder 12, and the first rotating cylinder is fixedly connected to the action end of the first lifting cylinder 13. When receiving materials, the rotating cylinder rotates and the lifting cylinder rises, so that the two trays on the material supporting orifice plate are attached to the outlets of the riffle divider. After receiving materials, the lifting cylinder descends and the rotating cylinder rotates 90 degrees, and then the tray can be taken by the robotic arm.

[0022] The heating and drying device is a plurality of small ovens 8. Two trays can be placed in each small oven. Each small oven is equipped with an independent heating device and a temperature controller. Automatic locking doors are installed on the front walls of each small oven. A nitrogen gas pipeline 24 is connected to each small oven, and a valve is installed on the nitrogen gas pipeline.

[0023] In this embodiment, the automatic locking door adopts a hinged door 801. The upper end of the hinged door 801 is hinged to the door frame of the small oven 8 through a hinge. An electromagnet 802 is installed on the front wall of the small oven. After the electromagnet is energized, it attracts the hinged door to close the small oven. Of course, the automatic locking door can also adopt various existing forms, such as the automatic locking door with a door closer currently used.

[0024] In this system, a waste hopper 11 is also installed on the frame. The outlet of the waste hopper 11 is connected to the outlet end of the sample reduction belt conveyor. A rotary drive mechanism is installed on the waste hopper. In this embodiment, the rotary drive mechanism adopts a tipping motor. A tipping plate 15 is fixedly connected to the output shaft of the rotary drive mechanism. Multiple sets of rotary pressing mechanisms are installed on the tipping plate. The rotary pressing mechanism includes a second rotating cylinder 16. The output end of the second rotating cylinder 16 is fixedly connected to a claw cylinder 17. There is a support block 18 fixedly connected to the tipping plate below the claw cylinder 17. After the robotic arm places the tray, the edge of the tray is supported on the support block. A tipping plate detection and induction sensor 19 is installed on the wall of the waste hopper. When discharging waste, the second robotic arm takes out the tray after drying and weighing, moves it above the support block of the waste hopper and places it down. The edge of the waste hopper is supported on the support block. The second rotating cylinder rotates, and the claw cylinder drops to press the edge. The tipping motor flips 180 degrees, and the material flows through the waste hopper to the outlet end of the sample reduction belt conveyor, and then the tipping motor reverses and resets. The tipping plate detection and induction sensor stops after detecting the tipping plate.

[0025] There is only one inlet and one outlet in this system, and the system can operate in a closed manner.

[0026] The working process of this system is as follows: The robotic arm picks up a tray from the tray rack and places it on the material supporting orifice plate. After the material supporting orifice plate rotates, it rises so that two trays are attached to the outlet of the riffle. The splitter feeds in materials and splits the materials into the trays. After the material supporting orifice plate descends and rotates, the second robotic arm places the tray on the electronic scale for weighing (it can be leveled by a leveling plate before and after weighing). The first robotic arm places the tray after the first weighing into the small drying chamber, introduces nitrogen for heating and drying. The first robotic arm places the dried tray on the electronic scale for the second weighing. The second robotic arm transfers the tray after the second weighing to the waste hopper for discarding.

[0027] After elaborating on the embodiments of the present invention in detail, those familiar with the technology can clearly understand that various changes and modifications can be made without departing from the scope and spirit of the above-mentioned patent application. Any simple modification, equivalent change, and modification made to the above embodiments based on the technical essence of the present invention all belong to the scope of the technical solution of the present invention, and the present invention is not limited to the embodiments described in the specification either.

Claims

1. An online moisture detection system, comprising a frame and a manipulator mounted on the frame, a tray rack, a belt conveyor for reducing and dividing materials, a discarded material belt, a heating and drying device, and an electronic scale. The manipulator is a three-axis manipulator with X, Y, and Z axes. The discarded material belt conveyor is located below the belt conveyor for reducing and dividing materials. The discharge pipe of the belt conveyor for reducing and dividing materials is connected to the feed port of the discarded material belt conveyor. A plurality of trays can be placed on the tray rack, and the system is characterized in that: The heating and drying device is a plurality of small ovens, each of which is equipped with an independent heating device and a temperature controller, and an automatic locking door is installed on the front wall of each small oven.

2. An online moisture detection system according to claim 1, characterized in that: Each small oven is connected to a nitrogen pipeline, and a valve is installed on the nitrogen pipeline.

3. An online moisture detection system according to claim 1, characterized in that: The automatic locking door adopts a hinged door, the upper end of which is hinged to the door frame of the small oven through a hinge, and an electromagnet is installed on the front wall of the small oven. When the electromagnet is energized, it is attracted to the hinged door to close the small oven.

4. An online moisture detection system according to claim 1, characterized in that: A splitter is installed on the outlet of the dividing belt conveyor, and the two outlets of the splitter correspond to the two material receiving trays.

5. An online moisture detection system according to claim 4, characterized in that: The running direction of the shrinking belt conveyor is the front-to-back direction, the two outlets of the divider are distributed front-to-back, the two feed trays are respectively placed on the supporting hole plates, the supporting hole plates are fixedly connected to the action end of the first rotating cylinder, and the first rotating cylinder is fixedly connected to the action end of the first lifting cylinder.

6. An online moisture detection system according to claim 1, characterized in that: A discard hopper is also installed on the frame, and the discharge of the discard hopper is connected to the discharge end of the reduction belt conveyor. A rotary drive mechanism is installed on the discard hopper, and a flip plate is fixedly connected to the output shaft of the rotary drive mechanism. Multiple sets of rotary clamping mechanisms are installed on the flip plate. The rotary clamping mechanism includes a second rotary cylinder, and the output end of the second rotary cylinder is fixedly connected to a pressure claw cylinder. A support block fixedly connected to the flip plate is provided below the pressure claw cylinder. After the manipulator puts down the pallet, the edge of the pallet is supported on the support block.

7. An online moisture detection system according to claim 6, characterized in that: A flip plate detection induction sensor is installed on the wall of the waste hopper.

8. An online moisture detection system according to claim 1, characterized in that: Two trays can be placed in each small oven.

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