A device for automatically detecting the water content of sand and gravel

Abstract

The present invention discloses a device for automatically detecting the water content of sand and gravel, which relates to the field of engineering detection, and includes a frame, a quantitative sand taking mechanism, a manipulator, a peeling mechanism and a weighing and drying mechanism installed on the frame; the quantitative sand taking mechanism is used to quantitatively take sand from sand and gravel, the peeling mechanism is used to peel the sand taking tray, the manipulator is used to transfer the sand taking tray loaded with sand and gravel, and the weighing and drying mechanism is used to weigh and dry the sand and gravel. The present invention has high detection accuracy for the water content of sand and gravel, and does not require manual operation during the detection process, which greatly reduces manpower and material resources; at the same time, the water content of sand and gravel can be detected in real time, and each detection only takes one or two minutes, which greatly improves the detection efficiency of sand and gravel.

Description

Technical Field

[0001] The invention relates to the field of engineering detection, and in particular to a device for automatically detecting the water content of sand and gravel. Background Art

[0002] Sand and gravel refers to a loose mixture of sand and crushed stone. In geology, mineral or rock particles with a particle size of 0.074 to 2 mm are generally called sand, and particles with a particle size greater than 2 mm are called gravel or angular gravel. In the process of concrete configuration, the ratio of water to cement determines the strength and durability of concrete, and the change in the moisture content of sand and gravel aggregate determines the amount of water replenishment, so it is of great significance to conduct online detection of the moisture content of sand and gravel.

[0003] At present, the common method for measuring the moisture content of sand and gravel is to manually take a certain amount of sand and gravel, weigh and record the weight of the water-containing sand and gravel, and then put the sand and gravel into a frying pan to fry the sand and gravel until they are dry (whether they are fried dry or not depends on manual experience). The disadvantage of this measurement method is that not only the detection cycle is long, but also the number of tests per day is limited, and whether they are fried dry or not is related to experience, which makes the measurement error large and loses the purpose of real-time detection. The second measurement method is to use a detector similar to a humidity sensor for detection. Although the measurement is fast, the error is large and the accuracy is insufficient, which cannot meet the customer's use requirements. Summary of the invention

[0004] The purpose of the present invention is to provide a device for automatically detecting the water content of sand and gravel to solve the above-mentioned problem.

[0005] To achieve the purpose of the present invention, the technical solution adopted is: a device for automatically detecting the moisture content of sand and gravel, comprising a frame, a quantitative sand taking mechanism, a manipulator, a peeling mechanism and a weighing and drying mechanism installed on the frame; the quantitative sand taking mechanism is used to quantitatively take sand and gravel, the peeling mechanism is used to peel the sand taking tray, the manipulator is used to transfer the sand taking tray loaded with sand and gravel, and the weighing and drying mechanism is used to weigh and dry the sand and gravel.

[0006] Furthermore, the quantitative sand taking mechanism includes a mounting frame that moves up and down along the frame; a pallet placement frame and a scraper are installed on the mounting frame, the scraper is located above the pallet placement frame, and the scraper and the pallet placement frame can move relatively.

[0007] Furthermore, a fixed baffle and a movable baffle movable toward the fixed baffle are respectively provided on two opposite sides of the tray placement rack, and limiting notches are provided on opposite surfaces of the fixed baffle and the movable baffle.

[0008] Furthermore, a first linear drive element for driving the movable baffle to move is also installed on the tray placement rack; a second linear drive element is also fixedly installed on the mounting frame, and an output end of the second linear drive element is fixed to the tray placement rack.

[0009] Furthermore, a bracket is fixedly mounted on the mounting frame, a scraper is fixedly mounted on the bracket, and the edge of the scraper cooperates with the upper surface of the pallet; the length direction of the scraper is perpendicular to the moving direction of the pallet, and both ends of the scraper extend outward beyond the edge of the pallet.

[0010] Furthermore, a slider is fixedly mounted on the frame, and a slide rail cooperating with the slider is fixedly mounted on the mounting frame; a third linear drive element is also fixedly mounted on the frame, and an output end of the third linear drive element is fixed to the mounting frame.

[0011] Furthermore, the mounting frame includes a horizontal section and at least one vertical section, the multiple vertical sections are vertically mounted on the horizontal section, and the axial direction of the slide rail is consistent with the axial direction of the vertical section.

[0012] Furthermore, the weighing and drying mechanism includes a box body fixedly mounted on a frame; the box body is provided with a switch door and an exhaust duct; a weighing device is also installed in the box body, and a tray rack is also installed on the weighing device; and a heating device is also installed in the box body.

[0013] Furthermore, the box body is also provided with a driving mechanism for driving the switch door to open and close automatically, and the driving mechanism includes a fixing frame fixedly mounted on the box body, and a fourth linear driving element for driving the switch door is also mounted on the fixing frame.

[0014] Furthermore, a clamping mechanism for clamping the switch door is installed on the box body, and there are two clamping mechanisms, which are respectively located on both sides of the switch door.

[0015] Furthermore, the clamping mechanism includes a driving cylinder fixedly mounted on the box body and a clamping block fixedly mounted on an output shaft of the driving cylinder.

[0016] Furthermore, a support frame is fixedly mounted on the weighing device, and a tray frame is fixedly mounted on the support frame; an isolation cover is also provided on the tray frame, a heating device is fixedly mounted on the isolation cover, an opening corresponding to the switch door is provided on the isolation cover, and an exhaust hole is also provided on the isolation cover.

[0017] Furthermore, the peeling mechanism includes a peeling tray and a weight sensor installed on the peeling tray.

[0018] Furthermore, a through groove is provided on the upper surface of the tray rack and the peeling tray, and limiting grooves are provided on both sides of the through groove.

[0019] Furthermore, the robot comprises a clamping arm that moves along the X-axis and the Z-axis; a clamping claw cylinder is also installed on the clamping arm, and the clamping claw cylinder is fixedly installed with a clamping arm.

[0020] The beneficial effects of the present invention are:

[0021] The weight of the tray is recorded by the peeling mechanism, and then the tray is automatically sent to the quantitative sand taking mechanism by the robot. The quantitative sand taking mechanism takes out a fixed volume of sand and gravel, and then the fixed volume of sand and gravel is sent to the weighing and drying mechanism by the robot. Before drying, the weighing and drying mechanism will weigh the weight of the sand and gravel. After the sand and gravel are sent to the weighing and drying mechanism, the weighing and drying mechanism will weigh the weight of the sand and gravel after drying, so as to obtain the weight of the sand and gravel before and after drying, and then subtract the weight of the tray from the weight of the sand and gravel before and after drying to obtain the net weight of the sand and gravel before and after drying, and then subtract the net weight of the sand and gravel after drying from the net weight before drying to obtain the mass difference between the sand and gravel before drying and after drying, and finally the mass difference is compared with the mass of the sand and gravel after drying to give the moisture content of the sand and gravel.

[0022] The present invention has high detection accuracy for the water content of sand and gravel, and does not require manual operation during the detection process, which greatly reduces manpower and material resources; at the same time, the water content of sand and gravel can be detected in real time, and each detection only takes one or two minutes, which greatly improves the detection efficiency of sand and gravel. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural diagram of the equipment for automatically detecting the water content of sand and gravel provided by the present invention;

[0024] Figure 2 yes Figure 1 The structure of the medium quantitative sand taking mechanism Figure 1 ;

[0025] Figure 3 yes Figure 1 The structure of the medium quantitative sand taking mechanism Figure 2 ;

[0026] Figure 4 yes Figure 2 Installation structure of the middle pallet rack Figure 1 ;

[0027] Figure 5 yes Figure 2 Installation structure of the middle pallet rack Figure 2 ;

[0028] Figure 6 yes Figure 1 Structural diagram of the medium weighing and drying mechanism;

[0029] Figure 7 yes Figure 1 Internal structure diagram of the weighing and drying mechanism;

[0030] Figure 8 yes Figure 7 A cross-sectional view of the middle isolation cover;

[0031] Fig. 9 yes Figure 1 Structural diagram of the peeling mechanism;

[0032] Fig.10 yes Figure 1 Structural diagram of the robot.

[0033] Markings and corresponding parts names in the attached drawings:

[0034] 1. Frame, 2. Quantitative sand taking mechanism, 3. Manipulator, 4. Peeling mechanism, 5. Weighing and drying mechanism;

[0035] 100, mounting frame, 101, tray placement frame, 103, scraper, 104, fixed baffle, 105, movable baffle, 106, first linear drive element, 107, second linear drive element, 108, bracket, 109, guide groove, 110, guide block, 111, slider, 112, slide rail, 113, third linear drive element, 114, limiting notch;

[0036] 1001, horizontal segment, 1002, vertical segment;

[0037] 300, clamping arm, 301, clamping claw cylinder, 302, clamping arm;

[0038] 400, peeling tray, 401, through slot, 402, limiting slot;

[0039] 500, box body, 501, switch door, 502, exhaust pipe, 503, weighing device, 504, tray rack, 505, heating device, 506, driving mechanism, 507, pressing mechanism, 508, supporting frame, 509, isolation cover, 510, opening, 511, exhaust hole;

[0040] 5061, a fixed frame, 5062, a fourth linear drive element;

[0041] 5071, driving motor, 5072, pressing block. DETAILED DESCRIPTION

[0042] The present invention is further described in detail below through specific implementation examples in conjunction with the accompanying drawings.

[0043] Figure 1The present invention shows an automatic device for detecting the moisture content of sand and gravel, comprising a frame 1, a quantitative sand taking mechanism 2, a manipulator 3, a peeling mechanism 4 and a weighing and drying mechanism 5 installed on the frame 1; the quantitative sand taking mechanism 2 is used for quantitatively taking sand and gravel, the peeling mechanism 4 is used for peeling the sand taking tray, the manipulator 3 is used for transferring the sand taking tray loaded with sand and gravel, and the weighing and drying mechanism 5 is used for weighing and drying the sand and gravel.

[0044] The quantitative sand taking mechanism 2, the manipulator 3, the peeling mechanism 4 and the weighing and drying mechanism 5 are all on the same vertical plane, and the quantitative sand taking mechanism 2, the manipulator 3, the peeling mechanism 4 and the weighing and drying mechanism 5 are all fixedly mounted on the frame 1 by screws. During the measurement of sand and gravel, the sand and gravel are placed on a tray. Therefore, before measuring the sand and gravel, the weight of the tray itself needs to be measured by the peeling mechanism 4. After the weight of the tray is weighed, the tray is sent to the sand taking mechanism by the manipulator 3 for quantitative sand taking. In actual use of the present invention, the quantitative sand taking mechanism 2 is docked with the conveying mechanism for conveying sand and gravel, so that the sand and gravel can automatically enter the quantitative sand taking mechanism 2 through the conveying mechanism, so that the quantitative sand taking mechanism 2 automatically realizes quantitative sand taking, so that the quantitative sand taking mechanism 2 can realize sand taking without manual cooperation during the sand taking process. After the quantitative sand taking is completed, the manipulator 3 sends the tray containing water-containing sand and gravel into the weighing and drying mechanism 5, so that the weighing and drying mechanism 5 weighs the water-containing sand and gravel and then dries it. After the sand and gravel are dried, the weighing and drying mechanism 5 weighs the weight of the dried sand and gravel to obtain the weight of the dried sand and gravel.

[0045] When calculating the moisture content of sand and gravel, first subtract the weight of the tray from the weight of the water-containing sand and gravel weighed by the weighing and drying mechanism 5 to obtain the net weight of the water-containing sand and gravel; then subtract the weight of the tray from the weight of the dried sand and gravel weighed by the weighing and drying mechanism 5 to obtain the net weight of the dried sand and gravel; finally, divide the difference between the net weight of the water-containing sand and gravel and the net weight of the dried sand and gravel by the net weight of the water-containing sand and gravel to obtain the moisture content of the sand and gravel. The entire test process can be completed without manual operation, which not only greatly reduces manpower and material resources, but also greatly improves the detection accuracy.

[0046] like Fig.10As shown, the manipulator 3 includes a clamping arm 300 that moves along the X-axis and the Z-axis; a clamping claw cylinder 301 is also installed on the clamping arm 300, and a clamping arm 302 is fixedly installed on the clamping claw cylinder 301. The X-axis moving direction of the clamping arm 300 is consistent with the feeding direction of the drying mechanism, and the Z-axis moving direction of the clamping arm 300 is consistent with the height direction of the frame 1, so that the clamping arm 300 can move in the X-axis and Z-axis directions; the clamping arm 302 cylinder is directly used in the existing technology, and the clamping arm 302 cylinder is fixedly installed with the extended end of the clamping arm 300; there are two clamping arms 302, and the two clamping arms 302 are respectively fixedly installed on the two clamping claws of the clamping claw cylinder 301. Through the drive of the clamping claw cylinder 301, the two clamping arms 302 can be opened and gathered, so as to clamp and move the pallet.

[0047] like Fig. 9 As shown, the peeling mechanism 4 includes a peeling tray 400 and a weight sensor installed on the peeling tray 400; the weight sensor is a direct use of an existing weight sensor, and the model of the weight sensor is LONGTEC, and the weight sensor is embedded in the peeling tray 400. When the tray for holding sand and gravel is placed on the peeling tray 400, the weight sensor can automatically measure the weight of the tray, which is convenient for the later calculation of the weight of the peeling tray 400 when the water content of the sand and gravel is calculated, thereby realizing the peeling of the tray; in actual use, the weight sensor can also be directly connected to the control module, so that the control module displays or stores the weight of the tray detected by the weight sensor.

[0048] like Figures 2 to 5 As shown, the quantitative sand taking mechanism 2 includes a mounting frame 100 that moves up and down along the frame 1; a pallet placement frame 101 and a scraper 103 are installed on the mounting frame 100, and the scraper 103 is located above the pallet placement frame 101, and the scraper 103 and the pallet placement frame 101 can move relative to each other.

[0049] When it is necessary to weigh the sand and gravel, the peeled pallet is placed on the pallet placement rack 101 by the manipulator 3. At this time, by moving the mounting frame 100 downward along the frame 1, the pallet placement rack 101 and the scraper 103 installed on the mounting frame 100 move synchronously when the mounting frame 100 moves downward, so that the pallet placement rack 101 is farther and farther away from the peeling mechanism 4, which is convenient for loading the sand and gravel into the pallet placed on the pallet rack 504. After the sand and gravel are loaded into the pallet, the mounting frame 100 is moved upward to reset the mounting frame 100, and the pallet placement rack 101 and the scraper 103 installed on the mounting frame 100 move upward synchronously, which is convenient for the manipulator 3 to transport the pallet containing sand and gravel to the next process. The scraper 103 is used to scrape the sand and gravel in the pallet. The scraper 103 and the pallet rack 101 move relative to each other, so that the scraper 103 and the pallet placed on the pallet rack 101 move relative to each other. While the scraper 103 moves relative to the pallet, the scraper 103 scrapes off the excess sand and gravel on the pallet, thereby ensuring that the volume of the sand and gravel in the pallet is fixed. Therefore, in the process of weighing the sand and gravel each time, the volume of the weighed sand and gravel is fixed, making the weighing of the sand and gravel more accurate.

[0050] A fixed baffle 104 and a movable baffle 105 movable toward the fixed baffle 104 are respectively provided on two opposite sides of the pallet placement rack 101, and the opposite surfaces of the fixed baffle 104 and the movable baffle 105 are provided with a limiting notch 114. The fixed baffle 104 is located on one side of the pallet placement rack 101, and the movable baffle 105 is located on the opposite side of the fixed baffle 104, so that the fixed baffle 104 and the movable baffle 105 are arranged oppositely on the pallet placement rack 101, and the length direction of the fixed baffle 104 is consistent with the moving direction of the pallet placement rack 101 or the length direction of the fixed baffle 104 is perpendicular to the moving direction of the pallet placement rack 101. Through the cooperation of the fixed baffle 104 and the movable baffle 105, one direction of the pallet can be limited after the pallet is placed on the pallet placement rack 101.

[0051] The limiting notch 114 on the movable baffle 105 is in the same straight line as the limiting notch 114 on the fixed baffle 104. By providing the limiting notch 114 on the fixed baffle 104 and the movable baffle 105, after the pallet is placed on the pallet placement rack 101, the other direction of the pallet is limited, and finally the two directions of the pallet are limited at the same time, which can not only prevent the pallet from moving on the pallet placement rack 101 when the pallet placement rack 101 moves, but also prevent the scraper 103 from moving on the pallet placement rack 101 during the scraping process of the excess sand and gravel in the pallet, and finally make the weighing of the sand and gravel in the pallet more accurate. At the same time, by setting the limiting notch 114 on the movable baffle 105 and the fixed baffle 104, the limiting block on the pallet can be set on the side of the pallet, so that the bottom surface of the pallet can be kept horizontal, so that the pallet can be placed horizontally after being sent to the next process, making the pallet more stable and preventing the sand and gravel in the pallet from pouring out due to the tilt of the pallet. The length of the pallet rack 101 is smaller than the length of the pallet, so that after the pallet is placed on the pallet rack 101, both ends of the pallet are suspended in the air, so that when the pallet needs to be sent to the next process, the two clamping arms 302 can directly pick up the two ends of the pallet, making it more convenient to pick up and place the pallet.

[0052] The pallet rack 101 is also provided with a first linear drive element 106 for driving the movable baffle 105 to move; the mounting frame 100 is also fixedly provided with a second linear drive element 107, and the output end of the second linear drive element 107 is fixed to the pallet rack 101; one end of the first linear drive element 106 is fixedly installed on the pallet rack 101, and the output end of the first linear drive unit is fixed to the movable baffle 105, and the first linear drive element 106 is a pneumatic telescopic cylinder, an electronic telescopic rod, an air cylinder, a screw nut structure, a gear rack structure or other existing linear drive elements, and the movable baffle 105 is driven by the first linear drive element 106, so that the gap between the movable baffle 105 and the fixed baffle 104 can be changed, so that after the pallet is placed on the pallet rack 101, the pallet can be clamped together by the fixed baffle 104 and the movable baffle 105, so that the pallet is more stable.

[0053] The mounting frame 100 is also provided with a guide groove 109 extending in the axial direction, and a guide block 110 cooperating with the guide groove 109 is also installed on the bottom surface of the tray placement frame 101. The guide groove 109 is a rectangular groove, and the guide groove 109 is provided on the upper surface of the mounting frame 100. The guide block 110 can be a rectangular block fixed to the bottom surface of the tray placement frame 101 or a roller rotatably supported on the bottom surface of the tray placement frame 101. The guide block 110 is slidably matched with the guide groove 109, so that the tray placement frame 101 always keeps moving in a straight line during the movement process, so that the movement of the tray placement frame 101 is more stable.

[0054] The second linear drive element 107 is a pneumatic telescopic cylinder, an electronic telescopic rod, a cylinder, a screw nut structure, a gear rack structure or other existing linear drive elements. The second linear drive element 107 is fixedly mounted on the mounting frame 100, and the output end of the second linear drive element 107 is fixed to the pallet placement frame 101; through the driving of the second linear drive element 107, the second linear drive element 107 drives the pallet placement frame 101 to move synchronously while driving, so that the pallet placement frame 101 reciprocates on the mounting frame 100, and while the pallet placement frame 101 reciprocates, the pallet placed on the pallet placement frame 101 moves synchronously, so that the pallet and the scraper 103 form a relative motion, and when the pallet moves with the pallet placement frame 101, the scraper 103 cooperates with the pallet, so that the scraper 103 scrapes off excess sand and gravel in the pallet, so that the amount of sand and gravel remaining on the pallet is fixed, thereby realizing quantitative weighing of sand and gravel.

[0055] The mounting frame 100 is fixedly mounted with a bracket 108, and the scraper 103 is fixedly mounted on the bracket 108, and the blade of the scraper 103 matches the upper surface of the pallet; the length direction of the scraper 103 is perpendicular to the moving direction of the pallet, and the two ends of the scraper 103 extend outward beyond the edge of the pallet. The bracket 108 is fixedly mounted on the mounting frame 100 by screws, and the bracket 108 is bent, and the bending angle of the bracket 108 is 90 degrees. The end of the bracket 108 fixed to the mounting frame 100 is close to the edge of the mounting frame 100 to prevent the bracket 108 from hindering the movement of the pallet placement frame 101; the scraper 103 is fixedly mounted on the other end of the bracket 108 by screws, and in order to prevent the scraper 103 from damaging the pallet after scraping sand and gravel for a long time, a soft layer can be provided on the outer surface of the blade of the scraper 103, which can not only ensure that the scraper 103 can effectively scrape the excess sand and gravel in the pallet, but also effectively prevent the scraper 103 from damaging the pallet. In order to prevent the scraper 103 from damaging the edge of the pallet when scraping away excess sand and gravel in the pallet, a chamfer can be provided at the edge of the pallet, which not only enables the scraper 103 to smoothly enter the top of the pallet, but also effectively prevents the scraper 103 from damaging the edge of the pallet.

[0056] When the width direction of the pallet is consistent with the moving direction of the pallet placement rack 101, the length of the scraper 103 is greater than the length of the pallet. When the length direction of the pallet is consistent with the moving direction of the pallet placement rack 101, the length of the scraper 103 is greater than the width of the pallet. When the scraper 103 scrapes away excess sand and gravel in the pallet, the excess sand and gravel in the pallet can only fall from the pallet, thereby effectively avoiding excess sand and gravel remaining at the edge of the pallet and ensuring the accuracy of sand and gravel weighing.

[0057] The frame 1 is fixedly mounted with a slider 111, and the mounting frame 100 is fixedly mounted with a slide rail 112 matched with the slider 111; the frame 1 is also fixedly mounted with a third linear drive element 113, and the output end of the third linear drive element 113 is fixed with the mounting frame 100. There are at least two sliders 111 and slide rails 112, and the two slide rails 112 are matched with the two sliders 111 respectively, and the slide rails 112 are "I"-shaped slide rails 112. The sliders 111 and the slide rails 112 are slidably matched, which not only makes the mounting frame 100 more stable during the up and down movement, but also effectively prevents the sliders 111 and the slide rails 112 from falling off during the up and down movement of the mounting frame 100; at the same time, in order to prevent the sliders 111 and the slide rails 112 from falling off due to the excessive movement of the mounting frame 100 during the up and down movement of the mounting frame 100, a limit stopper can be fixedly mounted at both ends of the slide rail 112, and the limit stopper can effectively limit the movement of the mounting frame. The third linear drive element 113 is a hydraulic telescopic cylinder, an electronic telescopic rod, a lead screw, a lead screw nut structure, a gear rack structure or other existing linear drive elements; through the driving of the third linear drive element 113, the third linear drive element 113 drives the mounting frame 100 to move while driving, so that the mounting frame 100 can be moved up and down, thereby transporting the pallet after the sand and gravel are weighed to the next process.

[0058] The mounting frame 100 includes a horizontal section 1001 and at least one vertical section 1002, and the multiple vertical sections 1002 are vertically installed on the horizontal section 1001, and the axial direction of the slide rail 112 is consistent with the axial direction of the vertical section 1002; the vertical section 1002 is welded or screwed to the horizontal section 1001, and the vertical section 1002 is located on one side or both sides of the horizontal section 1001 to avoid the vertical section 1002 from hindering the movement of the pallet placement rack 101; when there is one vertical section 1002, the mounting frame 100 is L-shaped; when there are two vertical sections 1002, the mounting frame 100 is U-shaped, at this time, the slide rails 112 can be installed on both vertical sections 1002, and sliders 111 respectively matched with the two sets of slide rails 112 are installed on the frame 1, so that the mounting frame 100 is more stable during the up and down movement.

[0059] like Figures 6 to 8 As shown, the weighing and drying mechanism 5 includes a box body 500 fixedly mounted on the frame 1; the box body 500 is provided with a switch door 501 and an exhaust duct 502; a weighing device 503 is also installed in the box body 500, and a tray rack 504 is also installed on the weighing device 503; a heating device 505 is also installed in the box body 500.

[0060] The box 500 is a heat preservation box 500, and the switch door 501 is used to control the opening and closing of the box 500, so that when the sand and gravel are dried in the box 500, the box 500 is in a closed state, and when the dried sand and gravel need to be taken out from the box 500 or the water-containing sand and gravel are sent into the box 500 for drying, the box 500 is in an open state. The exhaust pipe 502 is located on the top of the box 500 or on the rear wall of the box 500, and the exhaust pipe 502 is mainly used to discharge the moist steam generated by the sand and gravel during the drying process, so that the box 500 maintains a dry environment, and effectively avoids the moist steam in the box 500 during the drying process. The weighing device 503 is fixedly installed on the bottom surface of the box 500, and the weighing device 503 is an existing high temperature resistant electronic scale. When the height of the weighing device 503 is low, a base can be installed in the box 500, and the weighing device 503 is installed on the base. In order to facilitate the observation of the readings of the weighing device 503 during the weighing process of sand and gravel, the display screen of the weighing device 503 can be directly exposed outside the box 500 or a transparent observation window corresponding to the display screen of the weighing device 503 can be installed on the box 500; at the same time, when the present invention is used on a production line for measuring the moisture content of sand and gravel, the weighing device 503 can be connected to the control module so that the weighing device 503 can transmit data to the control module in real time, so that people can monitor the drying conditions of the sand and gravel in real time during the drying process.

[0061] The tray rack 504 is used to place the tray containing sand and gravel, so that during the measurement of sand and gravel, the tray is placed on the tray rack 504, which facilitates the sand and gravel to be quickly taken out of the box 500 during the drying process or the water-containing sand and gravel to be quickly sent into the box 500, thereby improving the efficiency of the sand and gravel during the drying process. The heating device 505 is one of the existing electric heating wire heating, microwave heating, infrared heating, etc., that is, the heating device 505 is directly used by the existing technology, and there is no need to further explain the heating device 505 here.

[0062] When the sand and gravel need to be dried, the switch door 501 is opened to open the box 500, and then a tray with a certain amount of water-containing sand and gravel is taken and placed on the tray rack 504. At this time, the weighing device 503 weighs and records the weight of the water-containing sand and gravel, and then the switch door 501 is closed to seal the box 500, and the heating device 505 is started to dry the sand and gravel. The moist steam generated during the drying process is discharged from the box 500. As the heating device 505 continues to heat, the steam is discharged from the box 500. The weighing device 503 continues to work, so that the water-containing sand and gravel are gradually dried. While the sand and gravel are gradually dried, the value weighed by the weighing device 503 gradually decreases. When the value weighed by the weighing device 503 does not change, the sand and gravel are completely dried. At this time, the weighing device 503 records the weight of the sand and gravel, and the heating device 505 stops working. The dried sand and gravel are taken out from the box body 500. At this time, the difference between the original mass of the water-containing sand and gravel and the mass of the dried sand and gravel can be obtained, and then the mass difference is compared with the mass of the dried sand and gravel to give the water content of the sand and gravel.

[0063] The box 500 is also provided with a driving mechanism 506 for driving the switch door 501 to open and close automatically, and the driving mechanism 506 includes a mounting frame 100 fixedly mounted on the box 500, and a fourth linear driving element 5602 for driving the switch door 501 is also mounted on the mounting frame 100 of the mounting frame 100. The switch door 501 is plate-shaped, the inner surface of the switch door 501 matches the outer surface of the box 500, and the switch door 501 is located outside the box 500; the mounting frame 10071 of the fixing frame 5601 is fixedly mounted on the outer wall of the box 5001 by screws, and the fourth linear driving mechanism 5067 is fixedly mounted on the mounting frame 10071 of the fixing frame 5601 by screws, and the switch door 5012 is moved on the outer surface of the box 5001 by the driving of the fourth linear driving element 560272, so as to realize the opening and closing of the switch door 5012. In order to make the switch door 5012 more stable during the movement, two guide grooves 109 fixed grooves are provided on the outer surface of the box 5001 in the same driving direction as the linear drive unit, and the two guide grooves 109 fixed grooves are arranged symmetrically along the center line of the switch door 5012, and then the guide blocks 110 fixed blocks that are respectively slidably matched with the two guide grooves 109 fixed grooves are fixedly installed on the switch door 5012, so that when the switch door 5012 is driven to move by the fourth linear drive element 560272, the cooperation between the guide groove 109 fixed groove and the guide block 110 fixed block can make the switch door 5012 more stable during the movement, and can make the inner surface of the switch door 5012 and the outer surface of the box 5001 cooperate better. At the same time, when the movement of the switch door 5012 can be guided by the cooperation between the guide groove 109 fixed groove and the guide block 110 fixed block, and the installation position of the fourth linear drive element 560272 is sufficient, the fourth linear drive element 560272 can be directly installed on the outer surface of the box 5001.

[0064] The fourth linear drive element 5602 is a pneumatic telescopic rod, so that when the fourth linear drive element 5602 drives the switch door 501 to move, the movement of the switch door 501 can be more stable. The fourth linear drive element 5602 can also adopt an electronic telescopic rod, a telescopic cylinder, a screw nut structure, a gear rack structure or other linear drive elements. The switch door 5012 is driven by the driving mechanism 5067, so that the opening and closing of the box 5001 does not require manual operation, making the entire drying process more intelligent, making the drying of sand and gravel more convenient, and improving the efficiency of sand and gravel drying; at the same time, the present invention can be directly used on the production line for measuring the water content of sand and gravel.

[0065] The box body 500 is also provided with a pressing mechanism 507 for pressing the switch door 501, and there are two pressing mechanisms 507, which are respectively located on both sides of the switch door 501. The pressing mechanism 507 is mainly used to make the switch door 501 fit tightly against the outer wall of the box body 500 after closing, thereby ensuring the sealing of the box body 500 after closing, and preventing the heat generated by the heating device 505 from directly leaking through the gap between the switch door 501 and the box body 500 during the drying process, thereby ensuring the drying effect of the heating device 505 on the sand and gravel. By providing two pressing mechanisms 507 and installing the two pressing mechanisms 507 on both sides of the switch door 501 respectively, the two pressing mechanisms 507 can cooperate with each other, so that both sides of the switch door 501 can be subjected to the pressure applied by the pressing mechanisms 507, so that the fit between the switch door 501 and the outer wall of the box body 500 is more uniform, and the sealing performance of the box body 500 is better after the switch door 501 is closed.

[0066] The clamping mechanism 507 includes a driving cylinder 5071 fixedly mounted on the box body 500 and a clamping block 5072 fixedly mounted on the output shaft of the driving cylinder 5071 . The driving cylinder 5071 is a double-linked cylinder, which extends and retracts a certain distance each time, and the driving cylinder 5071 is fixedly mounted on the outer wall of the box body 500 by screws; the clamping block 5072 is fixedly mounted on the output shaft of the driving cylinder 5071 by means of screw connection or key connection, so that when the driving cylinder 5071 is working, the clamping block 5072 fixed on the output shaft of the driving cylinder 5071 works synchronously, and as the driving cylinder 5071 pushes the clamping block 5072 to continue to move, the clamping block 5072 is pressed on the switch door 501 or moves away from the switch door 501, thereby realizing the clamping and loosening of the switch door 501. By clamping the switch door 501 by the clamping block 5072, the sealing performance of the box body 500 is better after the box body 500 is closed. When it is necessary to close the switch door 501, the fourth linear drive element 5602 drives the switch door 501 to move, so that the box body 500 is closed, and then the two driving cylinders 5071 contract, and the driving cylinder 5071 drives the clamping block 5072 to move synchronously, and the clamping block 5072 is pressed on the switch door 501 to seal the switch door 501 and the box body 500; when it is necessary to open the switch door 501, the two driving cylinders 5701 extend at the same time, and the driving cylinder 5701 drives the clamping block 5702 to move synchronously, so that the clamping block 5702 moves away from the switch door 501, and the clamping block 5072 loses its pressure on the switch door 501. At this time, the fourth linear drive element 5602 drives the switch door 501 to move, so that the box body 500 is opened.

[0067] The weighing device 503 is also fixedly mounted with a support frame 508, and the tray rack 504 is fixedly mounted on the support frame 508; the tray rack 504 is also covered with an isolation cover 509, the heating device 505 is fixedly mounted in the isolation cover 509, the isolation cover 509 is also provided with an opening 510 corresponding to the switch door 501, and the isolation cover 509 is also provided with an exhaust hole 511. The support frame 508 is cylindrical, and the lower end of the support frame 508 is fixed to the weighing device 503 through a flange. When the support frame 508 is subjected to gravity, the gravity exerted on the support frame 508 directly acts on the weighing device 503, so that the weighing device 503 displays the weighed weight. The isolation cover 509 is fixedly mounted in the box body 500, the tray rack 504 is located in the isolation cover 509, and the lower end of the support frame 508 passes through the isolation cover 509 and is fixedly connected to the weighing device 503, so that the weighing device 503 is located outside the tray rack 504. The heat-insulating cover 509 is a sandwich structure, and the heating device 505 is fixedly installed on the inner wall of the isolation cover 509 or embedded in the interlayer of the isolation cover 509. When the heating device 505 is microwave-operated, the isolation cover 509 is a microwave isolation cover, which is used to isolate the microwaves generated by the heating device 505 and prevent the microwaves generated by the heating device 505 from leaking. When the heating device 505 is an electric heating wire, the heating device 505 is spirally wound on the inner wall of the isolation cover 509 or spirally wound and installed in the interlayer of the isolation cover 509. By setting the isolation cover 509, not only can the microwaves and heat emitted by the heating device 505 directly act on the sand and gravel placed on the tray rack 504, but also the diffusion of microwaves and heat is reduced, the drying effect of the sand and gravel is improved, and the use of the weighing device 503 is guaranteed.

[0068] The exhaust hole 511 corresponds to the exhaust pipe 502, so that during the drying process of the sand and gravel, the moist steam generated by the sand and gravel can be directly discharged through the exhaust hole, and the humid hot steam discharged from the exhaust hole can be directly discharged through the exhaust pipe 502; in actual use, a conveying pipeline can be connected between the exhaust hole 511 and the exhaust pipe 502, so that the moist steam discharged through the exhaust hole 511 can be directly discharged to the outside of the box 500, effectively preventing the moist steam from entering the box 500 and causing water accumulation in the box 500 due to the condensation of the moist steam, which not only ensures that the box 500 is clean and tidy, but also effectively prevents the weighing device 503 from being damaged due to water accumulation in the box 500.

[0069] A through slot 401 is provided on the upper surface of the tray rack 504 and the peeled tray 400, and a limiting slot 402 is provided on both sides of the through slot 401. The through slot 401 is a rectangular slot, and the two ends of the through slot 401 respectively penetrate the two side surfaces of the tray rack 504, so that the side surface of the tray rack 504 is U-shaped, so that after the tray loaded with water-containing sand and gravel is placed on the tray rack 504, the two sides of the through slot 401 can effectively limit the tray, so that the tray is limited in the width direction of the tray rack 504; the limiting slot 402 is located on the two side walls of the through slot 401, and the limiting slot 402 is consistent with the limiting notch 114 in shape, and the limiting slot 402 can be a rectangular, trapezoidal or other structure ... The groove 402 runs through the upper surface of the pallet rack 504, so that when the pallet loaded with water-containing sand and gravel is placed on the pallet rack 504, the limit block on the pallet can be braked and placed in the limit groove 402, which is convenient for placing the pallet loaded with water-containing sand and gravel on the pallet rack 504 or for quickly taking out the pallet after the sand and gravel are dried; by providing the limit groove 402, after the pallet loaded with water-containing sand and gravel is placed on the pallet rack 504, the length direction of the pallet is restricted, thereby effectively preventing the pallet loaded with sand and gravel from moving on the pallet, making the placement of the pallet more stable.

[0070] When it is necessary to detect the moisture content of sand and gravel, first place the tray for holding sand and gravel in the peeling tray 400, and make the limit block on the tray be stuck in the limit slot 402. At this time, the weight sensor detects the weight of the tray to obtain the weight of the tray; then, the clamping arm 300 moves downward along the Z-axis direction. When the clamping arm 300 moves, the clamping claw cylinder 301 drives the two clamping arms 302 to open, and the clamping arm 300 continues to move so that the two clamping arms 302 enter the two sides of the tray respectively. At this time, the clamping claw cylinder 301 drives the two clamping arms 302 to close, so as to clamp the tray. After the tray is clamped, the clamping arm 300 continues to move downward along the Z-axis direction to place the tray on the tray placement rack 101. After the tray is placed on the tray placement rack 101, the clamping claw The cylinder 301 drives the two clamping arms 302 to open, and the clamping arm 300 moves upward along the Z axis, so that the two clamping arms 302 are away from the pallet. After the pallet is placed on the pallet placement rack 101, the limiting blocks on the pallet correspond to the limiting notches 114 on the movable baffle 105 and the limiting notches 114 on the fixed baffle 104 respectively, and the first linear drive element 106 drives the movable baffle 105 to move, so that the distance between the movable baffle 105 and the fixed baffle 104 changes, so that the movable baffle 105 and the fixed baffle 104 clamp the pallet together. When the pallet is clamped, the limiting blocks on the pallet are respectively clamped in the limiting notches 114 on the movable baffle 105 and the limiting notches 114 on the fixed baffle 104, so that the pallet is fixedly installed on the pallet placement rack 101.

[0071] Pour sand and gravel into the tray. When the sand and gravel fill the tray and overflow the tray, stop the sand and gravel from entering the tray. At this time, the second linear drive element 107 is started, and the second linear drive element 107 pushes the tray placement rack 101 forward. When the tray placement rack 101 moves forward, the tray on the tray placement rack 101 moves forward synchronously. At this time, the tray and the scraper 103 form a relative motion. While the tray moves forward with the tray placement rack 101, the scraper 103 scrapes off the excess sand and gravel in the tray to fix the amount of sand and gravel in the tray. When the scraper 103 scrapes off the tray After the excess sand and gravel in the tray are scraped off, the second linear drive element 107 is reset. While resetting, the second linear drive element 107 drives the tray placement rack 101 to reset, so that the tray placed on the tray placement rack 101 is reset synchronously with the tray placement rack 101, and the quantitative weighing of sand and gravel is completed; then, the third linear drive element 113 is started, and the third linear drive element 113 drives the mounting frame 100 to move upward, so that the tray moves upward synchronously with the mounting frame 101, and the mounting frame 100 stops moving after moving to a fixed position.

[0072] Next, the first linear drive element 106 drives the movable baffle 105 to move, so that the distance between the movable baffle 105 and the fixed baffle 104 changes, the movable block and the fixed block lose the clamping of the pallet, and the clamping arm 300 moves downward along the Z-axis direction. When the clamping arm 300 moves, the clamping claw cylinder 301 drives the two clamping arms 302 to open, and the clamping arm 300 continues to move, so that the two clamping arms 302 enter the two sides of the pallet respectively. At this time, the clamping claw cylinder 301 drives the two clamping arms 302 to close, so as to clamp the pallet. After the pallet is clamped, the clamping arm 300 continues to move upward along the Z-axis direction. When the cross-legged clamping arm 300 moves to the position corresponding to the switch door 501, the clamping arm 300 stops moving along the Z-axis direction. At this time, the clamping arm 300 moves forward along the X-axis direction to allow the pallet to enter the box 500. When the pallet enters above the pallet rack 504, the clamping arm 300 stops moving along the X-axis direction. At this time, the clamping arm 300 moves downward along the Z-axis direction to place the pallet on the pallet rack 504. Finally, the clamping claw cylinder 301 drives the two clamping arms 302 to open, and the clamping arms 302 lose their clamping of the pallet. Finally, the clamping arm 300 retreats along the X-axis direction to allow the clamping arms 302 to exit the box 500.

[0073] The fourth linear drive element 5602 is started, and the fourth linear drive element 5602 drives the switch door 501 to move, and the switch door 501 closes the box body 500. At this time, the two driving cylinders 5071 are started at the same time, and the two driving cylinders 5071 are contracted at the same time, so that the pressing blocks 5072 respectively fixed on the output shafts of the two driving cylinders 5071 move synchronously, so that the two pressing blocks 5072 press the switch door 501 at the same time, so that the box body 500 is closed; the heating device 505 is started, and the heat emitted by the heating device 505 dries the water-containing sand and gravel in the tray. During the drying process of the hydrated sand and gravel, as the hydrated sand and gravel are gradually dried, the weight weighed by the weighing device 503 gradually decreases, and during the drying process of the hydrated sand and gravel, the weighing device continues to weigh the sand and gravel. When the value of the weighing device 503 does not change, the value of the weighing device 503 is recorded, and the heating work of the heating device 505 is stopped; during the drying process of the sand and gravel, the moist steam generated by the sand and gravel is discharged through the exhaust hole 511, and the moist steam is finally discharged from the exhaust pipe 502 after passing through the exhaust hole 511, ensuring that a dry environment is maintained in the box body 500.

[0074] When the sand and gravel are dried, the two driving cylinders 5071 are started at the same time, and the two driving cylinders 5071 are extended synchronously, so that the clamping blocks 5072 respectively fixed on the output shafts of the two driving cylinders 5071 move synchronously, so that the two clamping blocks 5072 lose the pressure on the switch door 501; then, the fourth linear drive element 5602 is started, and the fourth linear drive element 5602 drives the switch door 501 to move, so that the box 500 is opened; finally, the robot 3 removes the pallet from the pallet rack 504 and removes the box 500 mechanism.

[0075] Finally, subtract the weight of the pallet from the weight of the sand and gravel before and after drying to get the net weight of the sand and gravel before and after drying, then subtract the net weight of the sand and gravel after drying from the net weight of the sand and gravel before drying to get the mass difference between the sand and gravel before drying and after drying, finally, make a ratio between the mass difference and the mass of the sand and gravel after drying to give the moisture content of the sand and gravel.

[0076] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A device for automatically detecting the water content of sand and gravel, characterized in that: The invention comprises a frame (1), a quantitative sand taking mechanism (2), a manipulator (3), a peeling mechanism (4) and a weighing and drying mechanism (5) installed on the frame (1); the quantitative sand taking mechanism (2) is used for quantitatively taking sand from sandstone, the peeling mechanism (4) is used for peeling the sand taking tray, the manipulator (3) is used for transferring the sand taking tray loaded with sandstone, and the weighing and drying mechanism (5) is used for weighing and drying the sandstone; the quantitative sand taking mechanism (2) comprises a mounting frame (100) movable up and down along the frame (1); a tray placing frame (101) and a scraper (103) are installed on the mounting frame (100), and the scraper (103) is positioned The tray placing frame (101) is disposed above the tray placing frame (101), and the scraper (103) and the tray placing frame (101) are relatively movable; a fixed baffle (104) and a movable baffle (105) movable toward the fixed baffle (104) are respectively arranged on two opposite sides of the tray placing frame (101), and a limiting notch (114) is provided on the opposite surfaces of the fixed baffle (104) and the movable baffle (105); a first linear driving element (106) for driving the movable baffle (105) to move is also installed on the tray placing frame (101); a second linear driving element (107) is also fixedly installed on the mounting frame (100), and The output end of the second linear drive element (107) is fixed to the tray placement rack (101); the weighing and drying mechanism (5) comprises a box (500) fixedly mounted on the rack (1); the box (500) is provided with a switch door (501) and an exhaust pipe (502); a weighing device (503) is also installed in the box (500), and a tray rack (504) is also installed on the weighing device (503); a heating device (505) is also installed in the box (500); the box (500) is also provided with a driving mechanism (506) for driving the switch door (501) to open and close automatically, and the driving mechanism (506) is 06) comprises a fixing frame (5601) fixedly mounted on a box body (500), and a fourth linear drive element (5602) for driving the switch door (501) is also mounted on the fixing frame (5601); a clamping mechanism (507) for clamping the switch door (501) is also mounted on the box body (500), and there are two clamping mechanisms (507), and the two clamping mechanisms (507) are respectively located on both sides of the switch door (501); the clamping mechanism (507) comprises a driving cylinder (5071) fixedly mounted on the box body (500) and a clamping block (5072) fixedly mounted on the output shaft of the driving cylinder (5071).

2. The device for automatically detecting the water content of sand and gravel according to claim 1 is characterized in that: A bracket (108) is fixedly mounted on the mounting frame (100), and a scraper (103) is fixedly mounted on the bracket (108), and a cutting edge of the scraper (103) cooperates with an upper surface of a pallet; a length direction of the scraper (103) is perpendicular to a moving direction of the pallet, and two ends of the scraper (103) extend outward beyond an edge of the pallet; a slider (111) is fixedly mounted on the frame (1), and a slide rail (112) that cooperates with the slider (111) is fixedly mounted on the mounting frame (100); a third linear drive element (113) is also fixedly mounted on the frame (1), and an output end of the third linear drive element (113) is fixed to the mounting frame (100).

3. The device for automatically detecting the water content of sand and gravel according to claim 1 is characterized in that: A support frame (508) is also fixedly mounted on the weighing device (503), and the tray frame (504) is fixedly mounted on the support frame (508); an isolation cover (509) is also provided on the tray frame (504), the heating device (505) is fixedly mounted on the isolation cover (509), an opening (510) corresponding to the switch door (501) is also provided on the isolation cover (509), and an exhaust hole (511) is also provided on the isolation cover (509).

4. The device for automatically detecting the water content of sand and gravel according to claim 1 or 3, characterized in that: The peeling mechanism (4) comprises a peeling tray (400) and a weight sensor mounted on the peeling tray (400), and a through slot (401) is provided on the upper surface of the tray frame (504) and the peeling tray (400), and limiting slots (402) are provided on both sides of the through slot (401).

5. The device for automatically detecting the water content of sand and gravel according to claim 1 is characterized in that: The manipulator (3) comprises a clamping arm (300) which moves along the X-axis and the Z-axis; a clamping claw cylinder (301) is also installed on the clamping arm (300), and a clamping arm (302) is fixedly installed on the clamping claw cylinder (301).

Images