Integrated ardealite-based test piece dry-wet cycle and leachate monitoring system

Abstract

The invention relates to an integrated ardealite-based test piece dry-wet cycle and leachate monitoring system, which comprises: a test box, which is internally provided with a drying area and a wetting area, and between which a transfer port with controllable opening and closing is arranged; the dry-wet cycle test assembly comprises a transfer seat plate, a transfer driving unit for driving the transfer seat plate, and a spring plate which is arranged on the transfer seat plate and can move up and down, a to-be-tested ardealite-based test piece is placed on the spring plate, a switch trigger piece is arranged on the transfer driving unit, a trigger component is arranged below the spring plate, and the switch trigger piece is connected with the switch trigger piece. The trigger component is provided with an upper trigger point and a lower trigger point which have a conductive function. Compared with the prior art, the automatic dry-wet cycle is realized by utilizing the quality difference of the test piece in the dry cycle and wet cycle process, based on the quality threshold value and through the triggering component under the condition of not additionally arranging complex control devices and equipment.

Description

Technical Field

[0001] The invention belongs to the technical field of phosphogypsum-based roadbed material performance testing, and relates to an integrated phosphogypsum-based specimen dry-wet cycle and leachate monitoring system. Background Art

[0002] Phosphogypsum is an industrial byproduct, usually derived from the wet process of phosphoric acid production. Due to its chemical composition and physical properties, using phosphogypsum as a building material is an effective means of disposing of this byproduct. The volume of filler required for road subgrade construction is usually large, and using phosphogypsum as a road subgrade filler is one of the most effective ways to achieve its large-scale and resource-based disposal. However, phosphogypsum-based road subgrade fillers are subject to various environmental conditions in actual applications, among which dry-wet cycles are one of the important factors affecting their durability and stability.

[0003] In order to verify the mechanical properties and pollutant leaching characteristics of phosphogypsum-based roadbed materials under dry-wet changing conditions, and then explore their long-term service performance and environmental safety in a water-rich environment, it is necessary to design an experimental device that can simulate the natural dry-wet cycle environment.

[0004] However, although the existing dry-wet cycle test equipment can meet the research needs to a certain extent, there are still some problems and limitations in practical applications: first, it is difficult to move the specimen, and switching between the dry area and the wet area is usually achieved by manual handling. The switching process is cumbersome, which affects the dry-wet cycle efficiency. At the same time, due to the introduction of human factors, it is easy to cause mass loss of the specimen during the movement process; second, it is impossible to directly monitor the volume and mass changes of the specimen; third, it is impossible to monitor the pH value and heavy metal ions of the leachate.

[0005] Chinese patent application CN201910242425.6 discloses a dry-wet cycle simulation test device for a concrete tidal zone and a splash zone, comprising a liquid storage tank, a test box, a connecting pipe, a liquid storage tank vent, a test box vent, a ceiling fan, a steel pipe, a steel frame, an upper water level sensor, a lower water level sensor, a temperature and humidity sensor, a temperature sensor, a box support, a connecting valve, a pipe rack, an inlet pump, an inlet valve, an outlet pipe, an outlet pump, an outlet valve, a spray pipe, a spray head and a control box. The control box can control and record the test parameters in real time to achieve a clear boundary between the tidal zone and the splash zone. During the test, the tidal zone is always in an immersion environment and the splash zone is in a spraying environment.

[0006] Although the patent envisions the basic principle of dry-wet cycle, it has the following defects: (1) The patent lacks direct monitoring of the volume and mass changes of the specimen during the dry-wet cycle, and cannot obtain relevant data of the leaching solution in real time. The monitoring data requires the specimen to be disassembled during the cycle, which is easy to cause damage to the specimen and affect the accuracy of the data. (2) The patent lacks precise control of the wet environment, which affects the repeatability and reliability of the experimental results. (3) The dry-wet cycle of the patent is completed at the same spatial scale, which may cause mutual interference between the dry and wet areas during the switching process, affecting the experimental results; at the same time, the existing devices generally rely on simple air flow equipment such as ceiling fans for drying, which makes it difficult to achieve a truly effective dry cycle and cannot guarantee the constancy and consistency of the dry-wet cycle. Summary of the invention

[0007] The purpose of the present invention is to provide an integrated phosphogypsum-based specimen wet-dry cycle and leachate monitoring system to improve the wet-dry cycle efficiency, etc., so as to solve at least one of the above-mentioned problems.

[0008] The purpose of the present invention can be achieved by the following technical solutions: An integrated phosphogypsum-based specimen dry-wet cycle and leachate monitoring system, comprising: A test box, wherein a dry area and a wet area are provided inside the test box, and a transfer port that can be controlled to open and close is provided between the dry area and the wet area, wherein the dry area is used to dehumidify the phosphogypsum-based specimen, and the wet area is used to humidify the phosphogypsum-based specimen; A dry-wet cycle test assembly comprises a transfer base plate capable of moving back and forth between the dry area and the wet area through the transfer port, a transfer drive unit for driving the transfer base plate, and a spring plate disposed on the transfer base plate and capable of moving up and down, a phosphogypsum-based test piece as a test object being placed on the spring plate, a switch trigger sheet is disposed on the transfer drive unit, a trigger component that moves up and down with the spring plate is disposed below the spring plate, and an upper trigger point and a lower trigger point that are respectively located above and below the switch trigger sheet and have a conductive function are disposed on the trigger component, The trigger member and the switch trigger sheet are configured such that: when the trigger member moves upward with the spring plate until the lower trigger point contacts the switch trigger sheet, the transfer drive unit is positively activated to drive the transfer seat plate to move from the dry area to the wet area; When the trigger member moves downward with the spring plate until the upper trigger point contacts the switch trigger sheet, the transfer drive unit is reversely started to drive the transfer seat plate to move from the wet area to the dry area.

[0009] Furthermore, a guide rod passing through the transfer seat plate in a vertical direction is provided at the end angle position of the spring plate, and a spring member is sleeved on the guide rod. The lower end of the spring member is connected to the bottom end of the guide rod, and the upper end abuts against the transfer seat plate.

[0010] Furthermore, the transfer drive unit includes a double-headed motor installed under the transfer base plate, two driving gears drivingly connected to two output shafts of the double-headed motor, and two parallel guide racks passing through the transfer port and respectively meshing with the two driving gears are also arranged between the drying area and the wet area. The switch trigger piece is provided at the end of the double-headed motor, and the switch trigger piece includes an upper switch trigger piece located below the upper trigger point and a lower switch trigger piece located above the lower trigger point.

[0011] Furthermore, an upper insulating separation sheet is provided on the side wall of the drying area and can extend between the upper trigger point in contact state and the upper switch trigger sheet; A lower insulating separation sheet which can extend into between the lower trigger point in contact state and the lower switch trigger sheet is arranged on the side wall of the wet area.

[0012] Further, the trigger member comprises a trigger frame connected to the spring plate bottom plate and passing through the transfer seat plate, the trigger frame is provided with two trigger rods symmetrically arranged up and down, and the upper trigger point and the lower trigger point are respectively provided on the two trigger rods. Specifically, the trigger rod is preferably L-shaped.

[0013] Furthermore, the drying area is provided with a temperature-controllable electric heating tube, and a convection air hole is provided on the top; A humidification spray head connected to an external water pipe is provided above the wet zone, and a flow controller is provided on the external water pipe; The drying area and the wet area are also respectively provided with infrared measuring devices capable of real-time monitoring the volume change of the phosphogypsum-based specimen during the drying and wetting process.

[0014] Furthermore, a precision weighing scale is arranged on the spring plate, and a waterproof tray and a sponge pad are arranged on the precision weighing scale in sequence, the phosphogypsum-based specimen is placed on the sponge pad, and the side of the phosphogypsum-based specimen is wrapped with a rubber film, and permeable stone plates and filter papers are arranged on the upper and lower sides in sequence.

[0015] Furthermore, the wet-dry cycle test assembly also includes a pH value detection probe and a mass spectrometer module, one end of which is placed on the sponge pad and the other end of which extends from the side of the waterproof tray.

[0016] Furthermore, a retreat cavity is provided at the top of the boundary area between the dry area and the wet area, and a partition that can move up and down and a lifting drive member connected to the partition are slidably arranged in the retreat cavity. The opening area formed when the partition is lifted up and down constitutes the transfer port.

[0017] Furthermore, a sealing block is provided at the lower end of the partition.

[0018] Compared with the prior art, the present invention has the following advantages: (1) Independently partitioned dry and wet areas are set up, and by setting transfer ports and transfer drive components, the specimens can be quickly switched between the dry and wet areas. At the same time, by utilizing the mass difference of the specimens during the dry cycle and the wet cycle, based on the quality threshold, through the trigger component, automatic dry-wet cycle is realized without adding complex control devices and equipment. Compared with the existing manual handling and switching, the dry-wet cycle efficiency is greatly improved.

[0019] (2) Further, by setting up a partition and a sealing tooth block in the transfer port, it is possible to facilitate switching while ensuring the sealing performance between the dry area and the wet area, thereby avoiding mutual influence between the two and affecting the dry-wet cycle effect.

[0020] (3) Furthermore, by setting a sponge pad at the bottom of the phosphogypsum-based specimen, a pH detection probe and a mass spectrometer module set in the sponge pad, the pH value and heavy metal ion concentration of the leachate that penetrates from the specimen into the sponge pad can be monitored during the dry-wet cycle.

[0021] (4) By further arranging a flow controller on the external pipe body of the external water pipe of the humidifying spray head, the dry-wet cycle amplitude of the wet zone can be set to different degrees to achieve the target moisture content of different wet cycle amplitudes.

[0022] (5) Furthermore, by setting up an infrared measuring device, the changes in the shape and volume of the test piece can be monitored in real time during the dry cycle and wet cycle.

[0023] (6) Furthermore, by setting up a precision weighing scale, the mass change of the test piece can be monitored in real time during the dry cycle and wet cycle. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the external structure of the integrated phosphogypsum-based specimen wet-dry cycle structure and leachate monitoring system of the present invention.

[0025] Figure 2 It is a schematic diagram of the internal structure of the integrated phosphogypsum-based specimen wet-dry cycle structure and the leachate monitoring system of the present invention.

[0026] Figure 3It is a front view and cross-sectional structural schematic diagram of the integrated phosphogypsum-based specimen wet-dry cycle structure and leachate monitoring system of the present invention.

[0027] Figure 4 It is a schematic diagram of the partition structure in the integrated phosphogypsum-based specimen dry-wet cycle structure and leachate monitoring system of the present invention.

[0028] Figure 5 It is a structural schematic diagram of the transfer drive assembly and the triggering component in the integrated phosphogypsum-based specimen dry-wet cycle structure and leachate monitoring system of the present invention.

[0029] Description of the markings in the figure: 1-test box; 2-phosphogypsum-based specimen; 3-drying area; 4-wet area; 5-transfer guide groove; 6-transfer port; 7-partition; 8-transfer seat plate; 9-spring plate; 10-precision weighing scale; 11-waterproof tray; 12-sponge pad; 13-permeable stone slab; 14-filter paper; 15-mass spectrometer module; 16-electric heating tube; 17-convection air hole; 18-humidification spray head; 19-external water pipe; 20-flow controller; 21-infrared measuring device; 22-double-headed motor; 23-driving gear; 24-guide rack; 25-motor switch trigger plate; 26-trigger frame; 27-trigger rod; 28-upper insulating partition plate; 29-lower insulating partition plate; 30-sealing tooth block; 31-retraction cavity; 32-lifting drive member; 33-pH value detection probe. DETAILED DESCRIPTION

[0030] The present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. This embodiment is implemented based on the technical solution of the present invention, and provides a detailed implementation method and specific operation process, but the protection scope of the present invention is not limited to the following embodiments.

[0031] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0032] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0033] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0034] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the embodiments of the present invention in detail, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0035] In order to improve the dry-wet cycle efficiency, etc. The present invention provides an integrated phosphogypsum-based specimen dry-wet cycle and leachate monitoring system, which can be found in Figures 1 to 5 As shown, including: A test box 1, wherein a dry area 3 and a wet area 4 are provided inside the test box, and a transfer port 6 which can be controlled to open and close is provided between the dry area 3 and the wet area 4, wherein the dry area 3 is used to dehumidify the phosphogypsum-based specimen, and the wet area 4 is used to humidify the phosphogypsum-based specimen; The dry-wet cycle test assembly comprises a transfer base plate 8 which can move back and forth between the dry area 3 and the wet area 4 through the transfer port 6, a transfer drive unit which drives the transfer base plate 8, and a spring plate 9 which is arranged on the transfer base plate 8 and can move up and down, the spring plate 9 is provided with a phosphogypsum-based test piece to be tested, the transfer drive unit is provided with a switch trigger sheet (i.e., a motor switch trigger sheet 25), a trigger component which moves up and down with the spring plate 9 is provided below the spring plate 9, and the trigger component is provided with an upper trigger point and a lower trigger point which are respectively located above and below the switch trigger sheet and have a conductive function, The trigger member and the switch trigger sheet are configured such that: when the trigger member moves upward with the spring plate 9 until the lower trigger point contacts the switch trigger sheet, the transfer drive unit is positively activated to drive the transfer seat plate 8 to move from the drying area 3 to the wet area 4; When the trigger member moves downward with the spring plate 9 until the upper trigger point contacts the switch trigger sheet, the transfer drive unit is reversely started to drive the transfer seat plate 8 to move from the wet area 4 to the dry area 3 .

[0036] In the present invention, an upper trigger point, a lower trigger point, and a switch trigger piece are set as switches of a switch circuit (which can be divided into a forward switch circuit and a reverse switch circuit according to the difference in forward and reverse operation) for starting the transfer drive unit. In this way, in combination with the elastic restoring force of the spring plate 9 and the mass difference of the test piece during the dry-wet cycle, a suitable mass threshold is set, so that the trigger component with the upper trigger point and the lower trigger point moves downward or upward accordingly, thereby making the upper trigger point contact with the switch trigger piece (corresponding to the reverse switch circuit, the upper switch trigger piece), or the lower trigger point contact with the switch trigger piece (corresponding to the forward switch circuit, the lower switch trigger piece), thereby realizing cyclic movement in the wet area 4 and the dry area 3.

[0037] In some specific embodiments, a guide rod passing through the transfer seat plate 8 in a vertical direction is provided at the end angle position of the spring plate 9, and a spring member is sleeved on the guide rod, the lower end of the spring member is connected to the bottom end of the guide rod, and the upper end abuts against the transfer seat plate. Exemplarily, the spring member is a spring. Through the setting of the spring member, the elastic force generated by the spring member cooperates with the gravity of the phosphogypsum-based specimen to reach an initial equilibrium state. As the mass of the phosphogypsum-based specimen changes during the dry-wet cycle, the spring plate 9 and the trigger component provided thereon will rise and fall accordingly, thereby realizing the power-on of the drive control circuit of the transfer drive assembly, and realizing automatic dry-wet cycle switching.

[0038] In some specific embodiments, the transfer drive unit includes a double-headed motor 22 installed under the transfer base plate 8, two driving gears 23 drivingly connected to two output shafts of the double-headed motor 22, and two parallel guide racks 24 passing through the transfer port 6 and respectively meshing with the two driving gears 23 are also provided between the drying area 3 and the wet area 4. The switch trigger piece is provided at the end of the double-headed motor 22, and the switch trigger piece includes an upper switch trigger piece located below the upper trigger point and a lower switch trigger piece located above the lower trigger point.

[0039] It should be pointed out that the double-headed motor 22 has two drive control circuits, namely the forward drive control circuit and the reverse drive control circuit. When the forward drive control circuit is connected and energized, the double-headed motor 22 rotates forward, driving the transfer seat plate 8 to move from the dry area 3 to the wet area 4. Similarly, when the reverse drive control circuit is connected and energized, the double-headed motor 22 rotates reversely, driving the transfer seat plate 8 to move from the wet area 4 to the dry area 3. Here, the switch of the forward drive control circuit is the lower trigger point and the lower switch trigger piece (when the two are in contact, the forward drive control circuit is energized; when the two are separated, the forward drive control circuit is de-energized); the switch of the reverse drive control circuit is the upper trigger point and the upper switch trigger piece (when the two are in contact, the reverse drive control circuit is energized; when the two are separated, the reverse drive control circuit is de-energized).

[0040] In a more specific implementation, in order to correspond to the two output ends of the double-headed motor 22, two sets of trigger components are also provided on both sides of the double-headed motor 22 in a one-to-one correspondence.

[0041] In a more specific embodiment, the guide rack 24 can be arranged in the transfer guide groove 5 with two ends disposed in the drying area 3 and the wet area 4 .

[0042] In a more specific embodiment, an upper insulating partition sheet 28 capable of extending between the upper trigger point in contact and the upper switch trigger sheet is provided on the side wall of the dry area 3; a lower insulating partition sheet 29 capable of extending between the lower trigger point in contact and the lower switch trigger sheet is provided on the side wall of the wet area 4. Preferably, the bottom surface of the upper insulating partition sheet 28 is flush with the top surface of the upper switch trigger sheet located on the upper side, and the top surface of the lower insulating partition sheet 29 is flush with the bottom surface of the lower switch trigger sheet located on the lower side.

[0043] By providing the upper insulating partition sheet and the lower insulating partition sheet, the circuit can be disconnected after the transfer seat plate 8 and the like are moved to the preset areas of the wet area 4 and the dry area 3 to avoid collision due to excessive movement.

[0044] In some specific embodiments, the trigger member includes a trigger frame 26 connected to the bottom plate of the spring plate 9 and passing through the transfer base plate 8, and two trigger rods 27 symmetrically arranged up and down are provided on the trigger frame 26, and the upper trigger point and the lower trigger point are respectively provided on the two trigger rods 27. In order to avoid the influence or impact on other components, the trigger frame 26 is made of insulating material, and the upper trigger point and the lower trigger point have a conductive function and can be designed as an arc structure.

[0045] In some specific embodiments, a temperature-controllable electric heating tube 16 is provided in the drying zone 3, and a convection air hole 17 is provided on the top. The electric heating tube heats the airflow introduced through the convection air hole in an adjustable temperature, thereby drying the phosphogypsum-based specimen inside.

[0046] In some specific embodiments, a humidification spray head 18 connected to an external water pipe 19 is provided above the wet zone 4, and a flow controller 20 is provided on the external water pipe 19, which can set the dry-wet cycle amplitude of the wet zone 4 to different degrees to achieve target moisture content of different wet cycle amplitudes. Here, the flow controller is a control element commonly used in the art that can adjust the flow of the external water pipe. The specific type selection does not belong to the innovative protection point of the present invention and will not be repeated here.

[0047] In some specific embodiments, the drying area 3 and the wet area 4 are respectively provided with infrared measuring devices 21 capable of real-time monitoring of the volume change of the phosphogypsum-based specimen 2 during the drying and wetting process. Here, the infrared measuring device is an infrared sensor commonly used in the art, which measures the length, width, height and other parameters of the phosphogypsum-based specimen to comprehensively calculate its volume. The specific types do not belong to the innovative protection points of the present invention and will not be described in detail here.

[0048] In some specific embodiments, a precision weighing scale 10 is provided on the spring plate 9, a waterproof tray 11 and a sponge pad 12 are sequentially provided on the precision weighing scale 10, the phosphogypsum-based specimen is placed on the sponge pad 12, and the side of the phosphogypsum-based specimen is wrapped with a rubber film, and a permeable stone plate 13 and a filter paper 14 are sequentially provided on the upper and lower sides. By providing the precision weighing scale 10, the mass change of the specimen can be monitored in real time during the dry cycle and the wet cycle.

[0049] In a more specific embodiment, the dry-wet cycle test assembly also includes a pH value detection probe 33 and a mass spectrometer module 15, one end of which is placed on the sponge pad 12 and the other end extends from the side of the waterproof tray 11. During the dry-wet cycle, the pH value and heavy metal ion concentration of the leachate that penetrates from the specimen into the sponge pad 12 can be monitored. The mass spectrometer module 15 here is a conventional component module in the art that can detect the concentration of heavy metal ions in liquids, and does not belong to the innovative protection point of the present invention, and will not be repeated here.

[0050] In some specific embodiments, a retraction cavity 31 is provided at the top of the boundary area between the dry area 3 and the wet area 4, and a partition 7 that can move up and down and a lifting drive 32 connected to the partition 7 are slidably arranged in the retraction cavity 31, and the opening area formed when the partition 7 is lifted up and down constitutes the transfer port 6. The lifting drive 32 can be an electric cylinder, a lifting motor, etc. commonly used in the art, which can receive a mass threshold signal, and when the mass of the phosphogypsum-based specimen in the dry area 3 and the wet area 4 reaches a preset threshold (at this time, the transfer drive unit is just triggered to start), the lifting drive 32 is started to drive the partition 7 to rise, open the transfer port 6, so that the transfer seat plate 8 and the like can be smoothly transferred and switched between the dry area 3 and the wet area 4, and after one transfer is completed (the transfer drive unit can be selected to be powered off as the completion signal), the lifting drive 32 drives the partition 7 to descend, thereby separating the dry area 3 and the wet area 4, so that the internal environment of the two areas can be independently adjusted.

[0051] In a more specific embodiment, a sealing block is provided at the lower end of the partition 7. According to the setting of the above-mentioned guide rack 24, the sealing block can be provided with a sealing tooth block 30 that can engage with the guide rack 24. In this way, when the partition 7 is lowered into place, the sealing performance between the dry area 3 and the wet area 4 can be guaranteed to avoid mutual influence between the two and affect the dry-wet cycle effect.

[0052] The above embodiments may be implemented individually or in any combination of two or more.

[0053] The above implementation is described in more detail below in conjunction with specific examples.

[0054] Example 1

[0055] Reference Figure 1-Figure 5 , which is the first embodiment of the present invention, provides an integrated phosphogypsum-based specimen dry-wet cycle structure. It includes a test box 1, a phosphogypsum-based specimen 2, and also includes a dry area 3 arranged in the test box 1 for dehumidifying the phosphogypsum-based specimen 2 and a wet area 4 for humidifying the phosphogypsum-based specimen 2. The dry area 3 is located on the left side of the test box 1, and the wet area 4 is located on the right side of the test box 1. A transfer guide groove 5 is provided at the inner bottom of the test box 1. The transfer guide groove 5 is horizontally distributed along the left and right directions. In this embodiment, two transfer guide grooves are provided, which are distributed side by side in front and back. The transfer guide grooves 5 cross the dry area 3 and the wet area 4, so that the phosphogypsum-based specimen 2 can switch between dry and wet cycles along the transfer guide grooves 5; a transfer port 6 is provided between the dry area 3 and the wet area 4, and the front and rear dimensions of the transfer port 6 are consistent with the front and rear inner diameter dimensions of the test box 1; a liftable partition 7 is provided above the transfer port 6.

[0056] The test box 1 is provided with a transfer base plate 8 inside, a spring plate 9 is provided on the transfer base plate 8, a precision weighing scale 10 is provided on the spring plate 9, a waterproof tray 11 is provided on the precision weighing scale 10, a sponge pad 12 is provided on the waterproof tray 11, the phosphogypsum-based specimen 2 is provided on the sponge pad 12, and the upper and lower sides of the phosphogypsum-based specimen 2 are sequentially provided with a permeable stone plate 13 and a filter paper 14, and the side is coated with a rubber film; The bottom of the transfer seat plate 8 is provided with a transfer driving assembly that cooperates with the transfer guide groove 5, and the bottom of the spring plate 9 is provided with a triggering member that cooperates with the transfer driving assembly.

[0057] Specifically, in the present embodiment, four guide rods passing through the transfer base plate 8 are arranged around the bottom of the spring plate 9 , and a spring is arranged between the bottom of the four guide rods and the bottom of the transfer base plate 8 .

[0058] The precision weighing scale 10 is used to monitor the mass change of the specimen during the dry-wet cycle. At the same time, in this embodiment, the mass threshold of the specimen in the wet cycle and the mass threshold of the specimen in the dry cycle are respectively set in the precision weighing scale 10. The spring plate is constantly raised and lowered with the mass fluctuation of the specimen. When the lifting stroke reaches the threshold, the circuit of the transfer drive assembly is energized through the trigger component, thereby realizing automatic dry-wet cycle switching.

[0059] As a further improvement of this embodiment, electric heating tubes 16 are arranged on the upper and lower sides of the drying zone 3, and convection air holes 17 are arranged on the top. The electric heating tubes 16 have a temperature control function and can adjust the temperature by themselves. The convection air holes 17 can accelerate the air flow and accelerate the drying of the phosphogypsum-based specimen 2. Through the above structure, the phosphogypsum-based specimen 2 can be dry-circulated.

[0060] As a further improvement of this embodiment, a humidification spray head 18 is arranged above the wet zone 4, and the humidification spray head 18 is connected to an external water pipe 19, and a flow controller 20 is arranged on the outer pipe body of the external water pipe 19. The humidification spray head 18 can reduce the impact of water flow on the phosphogypsum-based specimen 2; the flow controller 20 can accurately control the humidity in the wet zone 4.

[0061] As a further improvement of this embodiment, an infrared measuring device 21 is provided in both the dry zone 3 and the wet zone 4. The infrared measuring device 21 can monitor in real time the volume change of the phosphogypsum-based specimen 2 during the dry-wet cycle of the phosphogypsum-based specimen 2.

[0062] As a further improvement of this embodiment, the transfer drive assembly includes a double-headed motor 22 disposed at the bottom of the transfer base plate 8, two drive gears 23 connected to the double-headed motor 22, and two guide racks 24 disposed at the bottom of the two transfer guide grooves 5, and the two drive gears 23 are meshed and connected with the two guide racks 24. Figure 2 As shown, the double-headed motor 22 is distributed along the front-to-back direction. The double-headed motor 22 drives the driving gear 23 so that the driving gear 23 engages with the guide rack 24 for transmission, thereby realizing left-right movement along the transfer guide groove 5. Secondly, an auxiliary wheel is also arranged under the transfer seat plate 8, which can play a stabilizing role and realize switching between the dry area 3 and the wet area 4.

[0063] As a further improvement of the present embodiment, the trigger component includes four motor switch trigger pieces 25 (divided into upper switch trigger pieces and lower switch trigger pieces according to the different upper and lower positions) arranged at both ends of the double-headed motor 22 and located on the upper and lower sides, and two trigger frames 26 connected to the bottom of the spring plate 9 and passing through the transfer seat plate 8. The two trigger frames 26 are both provided with trigger rods 27 symmetrically distributed up and down and corresponding to the motor switch trigger pieces 25. The trigger frame 26 is made of insulating material, and the rod head of the trigger rod 27 is an arc structure, which is respectively the upper trigger point and the lower trigger point according to the position. The two motor switch trigger pieces 25 on the same side of the upper and lower sides can be set to control the forward and reverse rotation of the motor shaft corresponding to one end. The rod head of the trigger rod 27, that is, the upper trigger point or the lower trigger point, has a conductive function.

[0064] As a further improvement of this embodiment, two upper insulating partition plates 28 are provided on the box wall in the dry zone 3, and two lower insulating partition plates 29 are provided on the box wall in the wet zone 4. The bottom surfaces of the two upper insulating partition plates 28 are flush with the top surfaces of the two motor switch trigger plates 25 located on the upper side, and the top surfaces of the two lower insulating partition plates 29 are flush with the bottom surfaces of the two motor switch trigger plates 25 located on the lower side.

[0065] As a further improvement of this embodiment, two sealing tooth blocks 30 are provided on the lower wall of the partition 7, and the two sealing tooth blocks 30 are adapted to the guide racks 24 in the transfer guide groove 5. Through the above structure, effective sealing between the dry area 3 and the wet area 4 can be achieved to avoid mutual influence between the two.

[0066] As a further improvement of this embodiment, a retraction chamber 31 is provided between the dry area 3 and the wet area 4, the partition 7 is slidably installed in the retraction chamber 31, and a lifting drive member 32 connected to the partition 7 is provided inside the retraction chamber 31. In this embodiment, the lifting drive member 32 is an electric pull cylinder.

[0067] When the device structure is used, the phosphogypsum-based specimen 2 is placed on the sponge pad 12, and a rubber film is wrapped on the side of the phosphogypsum-based specimen 2, and a permeable stone plate 13 and a filter paper 14 are placed on the upper and lower sides; the precision weighing scale 10 resets the weight thereon at this time, and sets the mass threshold corresponding to the moisture content of the specimen during the wet cycle and the mass threshold corresponding to the moisture content of the specimen during the dry cycle, and the spring plate 9 is in the upward state; in this embodiment, the phosphogypsum-based specimen 2 is located in the wet area 4, at this time, the trigger rod 27 on the upper side of the trigger frame 26 is located above the upper motor switch trigger piece 25 (i.e., the upper switch trigger piece), and the lower trigger rod 27 and the lower motor switch trigger piece 25 (i.e., the lower switch trigger piece) are in contact with each other. ) are separated by a lower insulating partition sheet 29, and the double-headed motor 22 is in a power-off state; the wet cycle begins, the flow rate of the external water pipe 19 is controlled by the flow controller 20, and the distilled water drips onto the phosphogypsum-based specimen 2 through the humidification spray head 18. As the distilled water infiltrates, the weight on the precision weighing scale 10 continues to increase, and the spring plate 9 gradually descends, driving the trigger rod 27 on the upper side of the trigger member to gradually descend. When the trigger rod 27 on the upper side contacts the motor switch trigger sheet 25 on the upper side, it indicates that the mass corresponding to the moisture content of the specimen during the wet cycle has been reached. Under the action of the lifting drive member 32, the partition plate 7 is raised in advance to open the transfer port 6, and the circuit of the double-headed motor 22 is connected, and the guide is connected through the driving gear 23. The meshing rotation of the rack 24 drives the transfer seat plate 8 to transfer and switch the phosphogypsum-based specimen 2 from the wet area 4 to the dry area 3. After the transfer is switched to the dry area 3, the upper insulating partition plate 28 located in the dry area 3 is inserted between the upper trigger rod 27 and the motor switch trigger plate 25 located on the upper side, so that the circuit is disconnected to prevent the transfer seat plate 8 from moving excessively and colliding with the left side of the test box 1; the dry cycle starts after the transfer seat plate 8 stops. As the phosphogypsum-based specimen 2 is dehumidified, the weight on the precision weighing scale 10 is continuously reduced, and the spring plate 9 gradually rises, driving the trigger rod 27 on the lower side of the trigger member to gradually rise. When the trigger rod 27 on the lower side contacts the motor switch trigger plate 25 on the lower side, it indicates that the trigger is reached. The mass corresponding to the moisture content of the specimen during the dry cycle is obtained. Under the action of the lifting drive member 32, the partition 7 is raised in advance to open the transfer port 6, and the double-headed motor 22 circuit is connected. The transfer seat plate 8 drives the phosphogypsum-based specimen 2 to be transferred from the dry area 3 to the wet area 4 through the meshing rotation of the driving gear 23 and the guide rack 24. When the transfer is switched to the wet area 4, the lower insulating partition plate 29 located in the wet area 4 is inserted between the trigger rod 27 on the lower side and the motor switch trigger plate 25 on the lower side, so that the circuit is disconnected to prevent the transfer seat plate 8 from moving excessively and colliding with the right side of the test box 1; the above process is now a complete dry-wet cycle. In actual use, multiple dry-wet cycles can be performed according to actual working conditions.

[0068] Example 2

[0069] like Figure 2As shown, the integrated phosphogypsum-based specimen dry-wet cycle leachate monitoring system includes the above-mentioned integrated phosphogypsum-based specimen dry-wet cycle structure, and also includes a pH value detection probe 33 and a mass spectrometer module 15, one end of which is arranged inside the sponge pad 12 and the other end extends from the side of the waterproof tray 11. The pH value detection probe 33 and the mass spectrometer module 15 can monitor the pH value and heavy metal ion concentration of the leachate that penetrates from the phosphogypsum-based specimen 2 into the sponge pad 12.

[0070] Importantly, it should be noted that the construction and arrangement of the present application shown in a plurality of different exemplary embodiments are only exemplary. Although only a few embodiments are described in detail in this disclosure, it should be readily understood by those who refer to this disclosure that many modifications are possible (e.g., the size, scale, structure, shape and ratio of various elements, and parameter values ​​(e.g., temperature, pressure, etc.), installation arrangement, use of materials, color, directional changes, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in the application. For example, the element shown as integrally formed can be composed of multiple parts or elements, the position of the element can be inverted or otherwise changed, and the nature or number or position of the discrete element can be changed or changed. Therefore, all such modifications are intended to be included in the scope of the present invention. The order or sequence of any process or method steps can be changed or reordered according to alternative embodiments. Any "device plus function" clause is intended to cover the structure of performing the function described herein, and is not only structurally equivalent but also equivalent structure. Without departing from the scope of the present invention, other replacements, modifications, changes and omissions can be made in the design, operating conditions and arrangement of the exemplary embodiments. Therefore, the invention is not limited to a specific embodiment, but extends to numerous modifications still falling within the scope of the appended claims.

[0071] Additionally, in order to provide a concise description of exemplary embodiments, all features of an actual embodiment may not be described (ie, those features that are not relevant to the best mode presently contemplated for carrying out the invention or those features that are not relevant to implementing the invention).

[0072] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. An integrated phosphogypsum-based specimen dry-wet cycle and leachate monitoring system, characterized in that: include: A test box, wherein a dry area and a wet area are provided inside the test box, and a transfer port that can be controlled to open and close is provided between the dry area and the wet area, wherein the dry area is used to dehumidify the phosphogypsum-based specimen, and the wet area is used to humidify the phosphogypsum-based specimen; A dry-wet cycle test assembly comprises a transfer base plate capable of moving back and forth between the dry area and the wet area through the transfer port, a transfer drive unit for driving the transfer base plate, and a spring plate disposed on the transfer base plate and capable of moving up and down, a phosphogypsum-based test piece as a test object being placed on the spring plate, a switch trigger sheet is disposed on the transfer drive unit, a trigger component that moves up and down with the spring plate is disposed below the spring plate, and an upper trigger point and a lower trigger point that are respectively located above and below the switch trigger sheet and have a conductive function are disposed on the trigger component, The trigger member and the switch trigger sheet are configured such that: when the trigger member moves upward with the spring plate until the lower trigger point contacts the switch trigger sheet, the transfer drive unit is positively activated to drive the transfer seat plate to move from the dry area to the wet area; When the trigger member moves downward with the spring plate until the upper trigger point contacts the switch trigger sheet, the transfer drive unit is reversely started to drive the transfer seat plate to move from the wet area to the dry area.

2. The integrated phosphogypsum-based specimen wet-dry cycle and leachate monitoring system according to claim 1, characterized in that: A guide rod passing through the transfer seat plate in a vertical direction is provided at the end angle position of the spring plate, and a spring member is sleeved on the guide rod. The lower end of the spring member is connected to the bottom end of the guide rod, and the upper end abuts against the transfer seat plate.

3. The integrated phosphogypsum-based specimen wet-dry cycle and leachate monitoring system according to claim 1, characterized in that: The transfer drive unit includes a double-headed motor installed under the transfer base plate, two driving gears drivingly connected to the two output shafts of the double-headed motor, and two parallel guide racks passing through the transfer port and respectively meshing with the two driving gears are also arranged between the drying area and the wet area. The switch trigger piece is provided at the end of the double-headed motor, and the switch trigger piece includes an upper switch trigger piece located below the upper trigger point and a lower switch trigger piece located above the lower trigger point.

4. The integrated phosphogypsum-based specimen wet-dry cycle and leachate monitoring system according to claim 3, characterized in that: An upper insulating separation sheet is provided on the side wall of the drying area and can extend between the upper trigger point in contact state and the upper switch trigger sheet; A lower insulating separation sheet which can extend into between the lower trigger point in contact state and the lower switch trigger sheet is arranged on the side wall of the wet area.

5. The integrated phosphogypsum-based specimen wet-dry cycle and leachate monitoring system according to claim 1, characterized in that: The trigger component comprises a trigger frame connected to the spring plate bottom plate and passing through the transfer seat plate, and two trigger rods symmetrically arranged up and down are arranged on the trigger frame, and the upper trigger point and the lower trigger point are respectively arranged on the two trigger rods.

6. The integrated phosphogypsum-based specimen wet-dry cycle and leachate monitoring system according to claim 1, characterized in that: The drying area is provided with a temperature-controllable electric heating tube and a convection air hole is provided on the top; A humidification spray head connected to an external water pipe is provided above the wet zone, and a flow controller is provided on the external water pipe; The drying area and the wet area are also respectively provided with infrared measuring devices capable of real-time monitoring the volume change of the phosphogypsum-based specimen during the drying and wetting process.

7. The integrated phosphogypsum-based specimen wet-dry cycle and leachate monitoring system according to claim 1, characterized in that: A precision weighing scale is arranged on the spring plate, a waterproof tray and a sponge pad are arranged on the precision weighing scale in sequence, the phosphogypsum-based specimen is placed on the sponge pad, and the side of the phosphogypsum-based specimen is wrapped with a rubber film, and permeable stone plates and filter papers are arranged on the upper and lower sides in sequence.

8. The integrated phosphogypsum-based specimen wet-dry cycle and leachate monitoring system according to claim 7, characterized in that: The dry-wet cycle test assembly also includes a pH value detection probe and a mass spectrometer module, one end of which is placed on the sponge pad and the other end of which extends from the side of the waterproof tray.

9. The integrated phosphogypsum-based specimen wet-dry cycle and leachate monitoring system according to claim 1, characterized in that: A retreat cavity is provided at the top of the boundary area between the dry area and the wet area, and a partition that can move up and down and a lifting drive member connected to the partition are slidably arranged in the retreat cavity. The opening area formed when the partition is lifted up and down constitutes the transfer port.

10. An integrated phosphogypsum-based specimen wet-dry cycle and leachate monitoring system according to claim 9, characterized in that: A sealing block is provided at the lower end of the partition.

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