An automatic water retention rate testing device for plastering gypsum

Abstract

The present invention relates to the technical field of water retention rate testing devices, and specifically relates to an automated water retention rate testing device for plastering gypsum, including a testing box, a placement structure, a suction filtration structure, a connection structure, a fixing structure, a weighing structure, a pretreatment structure, a Buchner funnel, and a filter paper; the suction filtration structure is connected to the Buchner funnel through the connection structure, which improves the sealing performance. At the same time, after the connection structure is separated from the Buchner funnel, the residual water at the bottom of the Buchner funnel can be wiped off, improving the measurement accuracy during weighing; the Buchner funnel is placed through the placement structure, and at the same time, by cooperating with the pretreatment structure, the operations of placing the filter paper, feeding, leveling, and suction filtration measurement are carried out simultaneously, improving the automation degree and measurement efficiency of the device measurement. The suction filtration operation of the plastering gypsum is carried out through the suction filtration structure, and the Buchner funnel during suction filtration is fixed through the fixing structure; the plastering gypsum before and after suction filtration is weighed through the weighing structure to obtain the test result of the water retention rate of the plastering gypsum.

Description

Technical Field

[0001] The present invention relates to the technical field of water retention rate testing devices, and more specifically, to an automated water retention rate testing device for plastering gypsum. Background Art

[0002] As a new type of environmentally friendly building material, plastering gypsum is increasingly widely used in construction projects. Its water retention rate is one of the key indicators for measuring product quality, and it has a crucial impact on the performance of plastering gypsum during the construction process and the final use effect. Therefore, it is necessary to measure the water retention rate of the produced plastering gypsum.

[0003] However, from the perspective of the operation process, most traditional plastering gypsum water retention rate testing devices rely on manual operation, such as manually placing filter paper, feeding materials, scraping the plastering gypsum sample flat, and manually controlling the suction filtration process and weighing link. This not only has cumbersome operations and low efficiency, but also has large differences in manual operations, making it difficult to ensure the consistency of each test condition, resulting in low accuracy and reliability of the test results.

[0004] The existing testing devices generally have poor sealing performance. During the suction filtration process, air easily enters, affecting the suction filtration effect, making the moisture content of the filtered sample inaccurate, and ultimately resulting in deviations in the calculation of the water retention rate. In addition, the fixing effect of key components such as Buchner funnels in the device is not ideal. During suction filtration, the Buchner funnel is prone to shaking, which not only affects the normal progress of suction filtration, but also may cause the sample to spill out, resulting in test errors and even damaging the device.

[0005] The weighing method of traditional devices is not precise enough to effectively remove the residual moisture at the bottom of the Buchner funnel. These residual moisture will increase the weight during weighing, making the measurement result larger, and thus resulting in a large error in the calculation result of the water retention rate, unable to truly reflect the water retention performance of plastering gypsum. Summary of the Invention

[0006] In view of the problems in the prior art, the present invention provides an automated water retention rate testing device for plastering gypsum.

[0007] The technical solution adopted by the present invention to solve its technical problems is: an automated water retention rate testing device for plastering gypsum, including a test box, a placement structure provided on the test box, four Buchner funnels placed on the placement structure, filter paper placed inside the Buchner funnels, a suction filtration structure provided inside the test box, a connection structure provided on the suction filtration structure, a fixing structure provided inside the test box, a weighing structure provided inside the test box, and a pretreatment structure provided on the test box.

[0008] The placement structure includes a first motor and a connecting shaft. A first motor is fixedly connected inside the test box. A connecting shaft is rotatably connected to the test box. The output end of the first motor is fixedly connected to the connecting shaft. A placement rack is fixedly connected to the top end of the connecting shaft. Four Buchner funnels are placed on the placement rack.

[0009] The suction filtration structure includes a first suction filtration bottle and a sealing plug mounted on the first suction filtration bottle. A first suction filtration bottle is fixedly connected inside the test box.

[0010] The connection structure includes an insertion tube and a first sealing pad fixedly connected to the insertion tube. The insertion tube is slidably connected to the sealing plug. The first sealing pad abuts against the sealing plug. A second sealing pad is fixedly connected to the top end of the insertion tube. A fixing ring is fixedly connected to the Buchner funnel. The second sealing pad abuts against the fixing ring. A sponge sleeve is provided inside the insertion tube. The sponge sleeve is slidably connected to the Buchner funnel. A fixing plate is fixedly connected to the insertion tube. A first hydraulic rod is fixedly connected inside the test box. The telescopic end of the first hydraulic rod is fixedly connected to the fixing plate.

[0011] Specifically, four groups of positioning columns are fixedly connected to the placement rack. Each group of positioning columns has four. Four positioning holes are provided on each Buchner funnel. The positioning columns are inserted into the positioning holes.

[0012] Specifically, a second suction filtration bottle is fixedly connected inside the test box. A first connecting pipe is fixedly connected between the first suction filtration bottle and the second suction filtration bottle. A third connecting pipe is fixedly connected to the second suction filtration bottle. A vacuum pump is fixedly connected inside the test box. The end of the third connecting pipe is fixedly connected to the air suction end of the vacuum pump.

[0013] Specifically, a pressing plate is fixedly connected inside the test box. The pressing plate abuts against the sealing plug. A second connecting pipe is installed on the second suction filtration bottle. A regulating valve is installed on the second connecting pipe. A pressure gauge is fixedly connected inside the test box. A branch pipe is fixedly connected to the first connecting pipe. The end of the branch pipe is fixedly connected to the pressure gauge.

[0014] Specifically, the fixing structure includes a vertical frame and a gear rotatably connected to the vertical frame. A vertical frame is fixedly connected inside the test box. A first rack and a second rack are respectively engaged on both sides of the gear. The first rack is fixedly connected to the fixing ring. A connecting rod is fixedly connected to the second rack. The top end of the connecting rod is fixedly connected to a pressing cover. The pressing cover is buckled with the Buchner funnel.

[0015] Specifically, a guiding strip is fixedly connected to the vertical frame. The second rack is slidably connected to the guiding strip. Two guiding columns are fixedly connected to the bottom end of the pressing cover. The guiding columns are slidably connected to the test box.

[0016] Specifically, the weighing structure includes a second hydraulic rod and a mounting plate fixedly connected to the telescopic end of the second hydraulic rod. The inside of the test box is fixedly connected to the second hydraulic rod. A pressure sensor is fixedly connected to the mounting plate. Two fixing seats are fixedly connected to the pressure sensor. A screw rod is rotatably connected to one of the fixing seats, and a guide rod is fixedly connected to the other fixing seat. Two inserting strips are threadedly connected to the screw rod, and the inserting strips are slidably connected to the guide rod. Four slots are arranged in a circumferential array on the fixing ring, and the inserting strips are inserted into the slots.

[0017] Specifically, two slide rails are fixedly connected to the pressure sensor, the inserting strips are slidably connected to the slide rails, and a second motor is fixedly connected to the fixing seat. The output end of the second motor is fixedly connected to the screw rod.

[0018] Specifically, the pretreatment structure includes a plurality of columns and a support plate fixedly connected to the plurality of columns. The top of the test box is fixedly connected to a plurality of columns. A blanking device housing is fixedly connected to the support plate. A third motor is fixedly connected to the support plate. A propeller blade is rotatably connected to the inside of the blanking device housing. The output end of the third motor is fixedly connected to the propeller blade. An inclined discharge pipe is fixedly connected to the blanking device housing, and the bottom end of the discharge pipe points to one of the Buchner funnels.

[0019] Specifically, a third hydraulic rod is fixedly connected to the support plate. The telescopic end of the third hydraulic rod is fixedly connected to a connecting plate. A sliding column is fixedly connected to the connecting plate, and the sliding column is slidably connected to the support plate. A fourth motor is fixedly connected to the connecting plate. The output end of the fourth motor is fixedly connected to a scraper, and the scraper is rotatably connected to the inside of one of the Buchner funnels.

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

[0021] (1) For the automatic water retention rate testing device for plastering gypsum of the present invention, a placing structure is provided on the test box, a Buchner funnel is provided on the placing structure, a suction filtration structure is provided inside the test box, and a connection structure is provided on the suction filtration structure. The suction filtration structure is connected to the Buchner funnel through the connection structure, which improves the sealing performance and the suction filtration effect. At the same time, when the connection structure is separated from the Buchner funnel, the residual water at the bottom of the Buchner funnel can be wiped off, which improves the measurement accuracy during weighing and the accuracy of the device for testing the water retention rate.

[0022] (2) For the automatic water retention rate testing device for plastering gypsum of the present invention, the Buchner funnel is placed through the placing structure, and at the same time, it is convenient to place the filter paper, feed, scrape and level, and the suction filtration measurement work can be carried out simultaneously, which improves the automation degree and measurement efficiency of the device measurement. The suction filtration operation is carried out on the plastering gypsum through the suction filtration structure, which is convenient for measuring the water retention rate of the plastering gypsum.

[0023] (3) In the automatic water retention rate testing device for plastering gypsum of the present invention, a fixing structure is provided on the testing box to fix the Buchner funnel during suction filtration, improving the stability of the Buchner funnel during suction filtration.

[0024] (4) In the automatic water retention rate testing device for plastering gypsum of the present invention, a weighing structure is provided on the testing box to weigh the plastering gypsum before and after suction filtration, and the data is directly transmitted to the intelligent terminal for analysis and calculation to obtain the test result of the water retention rate of the plastering gypsum.

[0025] (5) In the automatic water retention rate testing device for plastering gypsum of the present invention, a pretreatment structure is provided on the testing box to realize the feeding and leveling operations of the plastering gypsum, improving the automation degree of measuring the water retention rate of the plastering gypsum. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The present invention will be further described below in conjunction with the drawings and embodiments.

[0027] Figure 1 FIG. is a schematic diagram of the overall structure of a preferred embodiment of the automatic water retention rate testing device for plastering gypsum provided by the present invention;

[0028] Figure 2 is Figure 1 an enlarged schematic diagram of the structure of part A shown in;

[0029] Figure 3 FIG. is a schematic diagram of the connection structure of the intubation and suction filtration structure of the present invention;

[0030] Figure 4 is Figure 3 an enlarged schematic diagram of the structure of part B shown in;

[0031] Figure 5 is Figure 3 an enlarged schematic diagram of the structure of part C shown in;

[0032] Figure 6 is Figure 3 an enlarged schematic diagram of the structure of part D shown in;

[0033] Figure 7 FIG. is a schematic diagram of the connection structure of the third hydraulic rod and the connecting plate of the present invention;

[0034] Figure 8 FIG. is a schematic diagram of the connection structure of the fourth motor and the scraper of the present invention;

[0035] Figure 9 is Figure 8 an enlarged schematic diagram of the structure of part E shown in.

[0036] In the figure: 1, test chamber; 2, placement structure; 201, first motor; 202, connecting shaft; 203, placement rack; 204, positioning post; 205, positioning hole; 3, suction filtration structure; 301, first suction filtration flask; 302, sealing plug; 303, pressing plate; 304, first connecting pipe; 305, second suction filtration flask; 306, second connecting pipe; 307, regulating valve; 308, third connecting pipe; 309, vacuum pump; 310, pressure gauge; 311, branch pipe; 4, connection structure; 401, insertion tube; 402, first sealing gasket; 403, second sealing gasket; 404, fixing ring; 405, sponge sleeve; 406, fixing plate; 407, first hydraulic rod; 5, fixing structure; 501, vertical frame; 502, gear; 503, first rack; 504, guiding strip; 505, second rack; 506, connecting rod; 507, pressing cover; 508, guiding post; 6, weighing structure; 601, second hydraulic rod; 602, mounting plate; 603, pressure sensor; 604, fixing base; 605, screw; 606, guiding rod; 607, slide rail; 608, inserting strip; 609, inserting slot; 610, second motor; 7, pretreatment structure; 701, column; 702, supporting plate; 703, blanking device housing; 704, third motor; 705, propeller blade; 706, discharge pipe; 707, third hydraulic rod; 708, connecting plate; 709, sliding column; 710, fourth motor; 711, scraping plate; 8, Buchner funnel; 9, filter paper. Detailed implementation manner

[0037] In order to make the technical means, creative features, achieved purposes and functions of the present invention easy to understand, the present invention will be further described below in conjunction with the detailed implementation manner.

[0038] As Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 and Figure 9 shown, an automatic water retention rate testing device for plastering gypsum of the present invention includes a test chamber 1, a placement structure 2 provided on the test chamber 1, four Buchner funnels 8 placed on the placement structure 2, filter paper 9 placed inside the Buchner funnels 8, a suction filtration structure 3 provided inside the test chamber 1, a connection structure 4 provided on the suction filtration structure 3, a fixing structure 5 provided inside the test chamber 1, a weighing structure 6 provided inside the test chamber 1, and a pretreatment structure 7 provided on the test chamber 1;

[0039] The placement structure 2 includes a first motor 201 and a connecting shaft 202. The first motor 201 is fixedly connected inside the test box 1, and the connecting shaft 202 is rotatably connected to the test box 1. The output end of the first motor 201 is fixedly connected to the connecting shaft 202. A placement rack 203 is fixedly connected to the top of the connecting shaft 202, and four Buchner funnels 8 are placed on the placement rack 203;

[0040] The suction filtration structure 3 includes a first suction filtration bottle 301 and a sealing plug 302 installed on the first suction filtration bottle 301. The first suction filtration bottle 301 is fixedly connected inside the test box 1;

[0041] The connection structure 4 includes an insertion tube 401 and a first sealing gasket 402 fixedly connected to the insertion tube 401. The insertion tube 401 is slidably connected to the sealing plug 302, and the first sealing gasket 402 abuts against the sealing plug 302. A second sealing gasket 403 is fixedly connected to the top of the insertion tube 401, and a fixing ring 404 is fixedly connected to the Buchner funnel 8. The second sealing gasket 403 abuts against the fixing ring 404. A sponge sleeve 405 is provided inside the insertion tube 401, and the sponge sleeve 405 is slidably connected to the Buchner funnel 8. A fixing plate 406 is fixedly connected to the insertion tube 401, and a first hydraulic rod 407 is fixedly connected inside the test box 1. The telescopic end of the first hydraulic rod 407 is fixedly connected to the fixing plate 406; When the Buchner funnel 8 with the plastering gypsum that has been leveled rotates above the weighing structure 6, start the weighing structure 6 to weigh the initial weight of the Buchner funnel 8 and the internal plastering gypsum. After weighing, retract the weighing structure 6, and then the first hydraulic rod 407 can be started. The first hydraulic rod 407 extends to drive the fixing plate 406 to rise. The fixing plate 406 rising drives the insertion tube 401 to rise. The top of the insertion tube 401 fits with the fixing ring 404 on the Buchner funnel 8, and the insertion tube 401 and the fixing ring 404 are sealed by the second sealing gasket 403. At the same time, the first sealing gasket 402 at the bottom end of the insertion tube 401 seals with the sealing plug 302 of the first suction filtration bottle 301. At the same time, the rising of the fixing plate 406 can also drive the fixing structure 5 to descend, and the fixing structure 5 fixes the Buchner funnel 8, and then start the suction filtration structure 3 to perform suction filtration on the plastering gypsum inside the Buchner funnel 8. When it is necessary to weigh the weight after suction filtration, the first hydraulic rod 407 needs to be retracted first. When the first hydraulic rod 407 drives the fixing plate 406 and the insertion tube 401 to descend together, the sponge sleeve 405 on the insertion tube 405 descends to dry the residual water on the Buchner funnel 8, and then weigh the Buchner funnel 8 through the weighing structure 6, improving the accuracy during weighing.

[0042] Specifically, such as Figure 1 、 Figure 2 、 Figure 3 、 Figure 6 、 Figure 7 、Figure 8 and Figure 9 As shown in Figure 9 , four groups of positioning columns 204 are fixedly connected to the placement rack 203. Each group of positioning columns 204 has four. Four positioning holes 205 are provided on each of the Buchner funnels 8. The positioning columns 204 are inserted into the positioning holes 205. A second filter flask 305 is fixedly connected inside the test box 1. A first connecting pipe 304 is fixedly connected between the first filter flask 301 and the second filter flask 305. A third connecting pipe 308 is fixedly connected to the second filter flask 305. A vacuum pump 309 is fixedly connected inside the test box 1. The end of the third connecting pipe 308 is fixedly connected to the air extraction end of the vacuum pump 309. A pressing plate 303 is fixedly connected inside the test box 1. The pressing plate 303 abuts against the sealing plug 302. A second connecting pipe 306 is installed on the second filter flask 305. A regulating valve 307 is installed on the second connecting pipe 306. A pressure gauge 310 is fixedly connected inside the test box 1. A branch pipe 311 is fixedly connected to the first connecting pipe 304. The end of the branch pipe 311 is fixedly connected to the pressure gauge 310. When the plastering gypsum inside the Buchner funnel 8 on the left is undergoing suction filtration, the already tested Buchner funnel 8 and the plastering gypsum in front can be removed from the placement rack 203 for cleaning and replacement. Then, a new Buchner funnel 8 is placed in the hole position in front of the placement rack 203. The setting of the positioning columns 204 and the positioning holes 205 improves the stability of the Buchner funnel 8. Then, a new filter paper 9 is placed and flattened. At the same time, the pretreatment structure 7 can be started. The pretreatment structure 7 feeds the mixed plastering gypsum into the newly replaced Buchner funnel 8 on the right. At the same time, the pretreatment structure 7 will level the freshly fed plastering gypsum in the Buchner funnel 8 at the back, improving the efficiency of the measurement work. After the suction filtration and measurement are completed, the first motor 201 is started. The first motor 201 drives the connecting shaft 202 to rotate. The rotation of the connecting shaft 202 drives the placement rack 203 to rotate by 90 degrees. Then, the operations of replacing the Buchner funnel 8, placing the filter paper 9, feeding the material, and leveling are repeated. During suction filtration, the vacuum pump 309 is started. The vacuum pump 309 extracts air from the second filter flask 305 through the third connecting pipe 308. The second filter flask 305 extracts air from the first filter flask 301 through the first connecting pipe 304. The first filter flask 301 performs suction filtration on the Buchner funnel 8 through the insertion tube 401. At the same time, before suction filtration, the regulating valve 307 is rotated to adjust the mercury column difference in the U-shaped pressure gauge 310 to between 395 - 405 mm or adjust the negative pressure of the pressure gauge 310 to between 52.67 - 54 kPa within 30 s. Suction filtration is carried out for 20 min, and then the weighing operation is performed.

[0043] Specifically, such as Figure 1 、 Figure 3 、 Figure 4 、 Figure 7 and Figure 8As shown, the fixing structure 5 includes an upright frame 501 and a gear 502 rotatably connected to the upright frame 501. The upright frame 501 is fixedly connected to the inside of the test box 1. A first rack 503 and a second rack 505 are respectively engaged on both sides of the gear 502. The first rack 503 is fixedly connected to the fixing ring 404. A connecting rod 506 is fixedly connected to the second rack 505. The top end of the connecting rod 506 is fixedly connected to a gland 507. The gland 507 is buckled with the Buchner funnel 8. A guiding strip 504 is fixedly connected to the upright frame 501. The second rack 505 is slidably connected to the guiding strip 504. Two guiding columns 508 are fixedly connected to the bottom end of the gland 507. The guiding columns 508 are slidably connected to the test box 1. When the intubation tube 401 and the fixing plate 406 move upward, it drives the first rack 503 to rise. The rising of the first rack 503 drives the gear 502 to rotate. The rotation of the gear 502 drives the second rack 505 to descend. The descending of the second rack 505 drives the connecting rod 506 to descend. The descending of the connecting rod 506 drives the gland 507 to descend. The gland 507 then buckles with the Buchner funnel 8 that is about to perform suction filtration, improving the stability of the Buchner funnel 8. When the suction filtration is completed and the intubation tube 401 descends to disengage from the bottom end of the Buchner funnel 8, it will also drive the gland 507 to rise. The disengagement of the gland 507 from the Buchner funnel 8 avoids blocking the Buchner funnel 8 and affecting the rotation of the Buchner funnel 8. The setting of the guiding columns 508 improves the stability of the up-and-down movement of the gland 507. The setting of the guiding strip 504 improves the stability of the sliding of the second rack 505.

[0044] Specifically, as Figure 1 , Figure 2 , Figure 5 and Figure 9As shown in the figure, the weighing structure 6 includes a second hydraulic rod 601 and a mounting plate 602 fixedly connected to the telescopic end of the second hydraulic rod 601. The inside of the test box 1 is fixedly connected to the second hydraulic rod 601. A pressure sensor 603 is fixedly connected to the mounting plate 602. Two sets of fixed seats 604 are fixedly connected to the pressure sensor 603. A screw rod 605 is rotatably connected to one set of the fixed seats 604, and a guide rod 606 is fixedly connected to the other set of the fixed seats 604. Two insertion strips 608 are threadedly connected to the screw rod 605. The insertion strips 608 are slidably connected to the guide rod 606. Four slots 609 are arranged in a circumferential array on the fixed ring 404. The insertion strips 608 are inserted into the slots 609. Two slide rails 607 are fixedly connected to the pressure sensor 603. The insertion strips 608 are slidably connected to the slide rails 607. A second motor 610 is fixedly connected to the fixed seat 604. The output end of the second motor 610 is fixedly connected to the screw rod 605. Before suction filtration, when the leveled plastering gypsum and the Buchner funnel 8 rotate above the weighing structure 6, the second hydraulic rod 601 is started. The second hydraulic rod 601 extends to drive the mounting plate 602 to rise. The rising of the mounting plate 602 drives the pressure sensor 603 to rise. When the pressure sensor 603 rises to the set height, the second motor 610 is started. The second motor 610 drives the screw rod 605 to rotate. The thread directions at both ends of the screw rod 605 are opposite. The screw rod 605 threadedly drives the two insertion strips 608 to slide towards each other, and then inserts into two slots 609 on the fixed ring 404. The settings of the guide rod 606 and the slide rails 607 improve the sliding stability of the insertion strips 608. After the insertion strips 608 are inserted into the slots 609, the second hydraulic rod 601 continues to extend. The second hydraulic rod 601 drives the fixed ring 404 and the Buchner funnel 8 to rise until the placement rack 203 no longer bears the weight of the Buchner funnel 8. At this time, the pressure sensor 603 is fully stressed. The pressure sensor 603 transmits the initial pressure data it bears to the intelligent terminal. After weighing is completed, the second motor 610 is started, and then the two insertion strips 608 are driven to separate from the slots 609. Then the second hydraulic rod 601 is retracted to the initial position, and then the suction filtration operation is carried out. After the suction filtration is completed, the weighing operation is repeated to measure the weight of the plastering gypsum after suction filtration and transmit the data to the intelligent terminal. The water retention rate of the plastering gypsum is calculated by the weight difference before and after suction filtration. When it is not necessary to measure the weight of the Buchner funnel 8, the pressure sensor 603 needs to be lowered to the bottom position of the lowest end of the Buchner funnel 8 to avoid affecting the conversion operation station of the placement structure 2 driving the Buchner funnel 8.

[0045] Specifically, as Figure 1 , Figure 3 , Figure 7 and Figure 8As shown, the pretreatment structure 7 includes a plurality of columns 701 and a pallet 702 fixedly connected to the plurality of columns 701. The top end of the test box 1 is fixedly connected with a plurality of columns 701. A blanking device housing 703 is fixedly connected to the pallet 702. A third motor 704 is fixedly connected to the pallet 702. A propeller blade 705 is rotatably connected inside the blanking device housing 703. The output end of the third motor 704 is fixedly connected to the propeller blade 705. An inclined discharge pipe 706 is fixedly connected to the blanking device housing 703. The bottom end of the discharge pipe 706 points to one of the Buchner funnels 8. A third hydraulic rod 707 is fixedly connected to the pallet 702. The telescopic end of the third hydraulic rod 707 is fixedly connected with a connecting plate 708. A sliding column 709 is fixedly connected to the connecting plate 708. The sliding column 709 is slidably connected to the pallet 702. A fourth motor 710 is fixedly connected to the connecting plate 708. The output end of the fourth motor 710 is fixedly connected with a scraper 711. The scraper 711 is rotatably connected inside one of the Buchner funnels 8. When plastering gypsum is fed, the third motor 704 is started. The third motor 704 drives the propeller blade 705 to rotate. The plastering gypsum inside the blanking device housing 703 spirally descends to the discharge pipe 706 for blanking. The plastering gypsum flows from the discharge pipe 706 into the right Buchner funnel 8. At the same time, the third hydraulic rod 707 on the pallet 702 can be contracted. The third hydraulic rod 707 drives the connecting plate 708 to descend. The descent of the connecting plate 708 drives the fourth motor 710 and the scraper 711 to descend. The scraper 711 enters the rear Buchner funnel 8. Then the fourth motor 710 is started. The start of the fourth motor 710 drives the scraper 711 to rotate. The scraper 711 then levels the plastering gypsum inside the Buchner funnel 8. Then the third hydraulic rod 707 is started to drive the scraper 711 to separate from the Buchner funnel 8, so as to avoid affecting the conversion of the measuring operation station of the Buchner funnel 8.

[0046] When the present invention is in use, first, when the Buchner funnel 8 with plastering gypsum that has been leveled rotates above the weighing structure 6, the weighing structure 6 is activated to weigh the initial weight of the Buchner funnel 8 and the internal plastering gypsum. After the weighing is completed, the weighing structure 6 is retracted. Then, the first hydraulic rod 407 can be activated. The first hydraulic rod 407 extends to drive the fixing plate 406 to rise. The fixing plate 406 rises to drive the insertion tube 401 to rise. The top end of the insertion tube 401 fits with the fixing ring 404 on the Buchner funnel 8. The insertion tube 401 and the fixing ring 404 are sealed by the second gasket 403. At the same time, the first gasket 402 at the bottom end of the insertion tube 401 seals with the sealing plug 302 of the first suction flask 301. Meanwhile, the rise of the fixing plate 406 can also drive the fixing structure 5 to descend. The fixing structure 5 fixes the Buchner funnel 8. Then, the suction filtration structure 3 is activated to perform suction filtration on the plastering gypsum inside the Buchner funnel 8. When it is necessary to weigh the weight after suction filtration, the first hydraulic rod 407 needs to be retracted first. When the first hydraulic rod 407 drives the fixing plate 406 and the insertion tube 401 to descend together, the sponge sleeve 405 on the insertion tube 401 descends to dry the residual water on the Buchner funnel 8. Then, the Buchner funnel 8 is weighed by the weighing structure 6, improving the accuracy during weighing;

[0047] Then, when the plastering gypsum inside the Buchner funnel 8 on the left is undergoing suction filtration work, the Buchner funnel 8 that has been tested and the plastering gypsum in front can be removed from the placement rack 203 for cleaning and replacement. Then, a new Buchner funnel 8 is placed in the hole position in front of the placement rack 203. The setting of the positioning column 204 and the positioning hole 205 improves the stability of the Buchner funnel 8. Then, a new filter paper 9 is placed and flattened. At the same time, the pretreatment structure 7 can be activated. The pretreatment structure 7 feeds the mixed plastering gypsum into the newly replaced Buchner funnel 8 on the right. At the same time, the pretreatment structure 7 levels the freshly fed plastering gypsum in the Buchner funnel 8 at the back, improving the efficiency of the measurement work. After the measurement after suction filtration is completed, the first motor 201 is activated. The first motor 201 drives the connecting shaft 202 to rotate. The connecting shaft 202 rotates to drive the placement rack 203 to rotate by 90 degrees. Then, the operations of replacing the Buchner funnel 8, placing the filter paper 9, feeding the material, and leveling are repeated. During suction filtration, the vacuum pump 309 is activated. The vacuum pump 309 evacuates the second suction flask 305 through the third connecting pipe 308. The second suction flask 305 evacuates the first suction flask 301 through the first connecting pipe 304. The first suction flask 301 performs suction filtration on the Buchner funnel 8 through the insertion tube 401. At the same time, before suction filtration, the regulating valve 307 is rotated to adjust the mercury column difference in the U-shaped pressure gauge 310 to between 395 - 405 mm or the negative pressure of the pressure gauge 310 to between 52.67 - 54 kPa within 30 s. Suction filtration is performed for 20 min, and then the weighing operation is carried out;

[0048] Secondly, when the intubation tube 401 and the fixing plate 406 move upward, the first rack 503 is driven to rise. The rising of the first rack 503 drives the gear 502 to rotate. The rotation of the gear 502 drives the second rack 505 to descend. The descending of the second rack 505 drives the connecting rod 506 to descend. The descending of the connecting rod 506 drives the gland 507 to descend. The gland 507 then engages with the Buchner funnel 8 that is about to be filtered, improving the stability of the Buchner funnel 8. When the filtration is completed and the intubation tube 401 descends to disengage from the bottom end of the Buchner funnel 8, the gland 507 is also driven to rise. The disengagement of the gland 507 from the Buchner funnel 8 prevents it from blocking the rotation of the Buchner funnel 8. The setting of the guide post 508 improves the stability of the up-and-down movement of the gland 507, and the setting of the guide bar 504 improves the stability of the sliding of the second rack 505;

[0049] Then, before filtration, when the plastering gypsum that has been leveled and the Buchner funnel 8 rotate above the weighing structure 6, the second hydraulic rod 601 is started. The elongation of the second hydraulic rod 601 drives the mounting plate 602 to rise. The rising of the mounting plate 602 drives the pressure sensor 603 to rise. When the pressure sensor 603 rises to the set height, the second motor 610 is started. The second motor 610 drives the screw rod 605 to rotate. The thread directions at both ends of the screw rod 605 are opposite. The screw rod 605 drives the two inserts 608 to slide towards each other through the thread, and then insert into the two slots 609 on the fixed ring 404. The setting of the guide rod 606 and the slide rail 607 improves the stability of the sliding of the inserts 608. After the inserts 608 are inserted into the slots 609, the second hydraulic rod 601 continues to elongate. The second hydraulic rod 601 drives the fixed ring 404 and the Buchner funnel 8 to rise until the placement rack 203 no longer bears the weight of the Buchner funnel 8. At this time, the pressure sensor 603 is fully stressed. The pressure sensor 603 transmits the initial pressure data it bears to the intelligent terminal. After weighing is completed, the second motor 610 is started, which then drives the two inserts 608 to separate from the slots 609. Then the second hydraulic rod 601 is retracted to the initial position, and then the filtration operation is carried out. After the filtration is completed, the weighing operation is repeated to measure the weight of the plastering gypsum after filtration and transmit the data to the intelligent terminal. The water retention rate of the plastering gypsum is calculated through the weight difference before and after filtration. When it is not necessary to measure the weight of the Buchner funnel 8, the pressure sensor 603 needs to be lowered to the bottom end position of the lowest end of the Buchner funnel 8 to avoid affecting the operation of the placement structure 2 to drive the rotation of the Buchner funnel;

[0050] Finally, when plastering gypsum is fed, the third motor 704 is started, and the third motor 704 drives the propeller blade 705 to rotate. The plastering gypsum inside the outer shell 703 of the feeder spirally descends to the discharge pipe 706 for discharging. The plastering gypsum flows from the discharge pipe 706 into the Buchner funnel 8 on the right. At the same time, the third hydraulic rod 707 on the supporting plate 702 can be contracted. The third hydraulic rod 707 drives the connecting plate 708 to descend. The descent of the connecting plate 708 drives the fourth motor 710 and the scraper 711 to descend. The scraper 711 enters the Buchner funnel 8 at the rear. Then the fourth motor 710 is started. The start of the fourth motor 710 drives the scraper 711 to rotate. The scraper 711 then levels the plastering gypsum inside the Buchner funnel 8. Then the third hydraulic rod 707 is started to drive the scraper 711 to separate from the Buchner funnel 8, so as not to affect the conversion of the measuring operation station of the Buchner funnel 8.

[0051] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above-described exemplary embodiments, and without departing from the spirit or basic characteristics of the present invention, the present invention can be implemented in other specific forms. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present invention. Any reference signs in the claims should not be construed as limiting the claimed claim.

[0052] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An automatic water retention rate testing device for plastering gypsum, characterized in that, It includes a test chamber (1), a placement structure (2) provided on the test chamber (1), a suction filtration structure (3) provided inside the test chamber (1), and a connection structure (4) provided on the suction filtration structure (3); The suction filtration structure (3) includes a first suction filtration bottle (301) and a sealing plug (302) mounted on the first suction filtration bottle (301). The first suction filtration bottle (301) is fixedly connected to the inside of the test chamber (1); The connection structure (4) includes an insertion tube (401) and a first sealing gasket (402) fixedly connected to the insertion tube (401). The insertion tube (401) is slidably connected to the sealing plug (302), the first sealing gasket (402) abuts against the sealing plug (302), a second sealing gasket (403) is fixedly connected to the top end of the insertion tube (401), four Buchner funnels (8) are placed on the placement structure (2), a fixing ring (404) is fixedly connected to the Buchner funnel (8), the second sealing gasket (403) abuts against the fixing ring (404), a sponge sleeve (405) is provided inside the insertion tube (401), the sponge sleeve (405) is slidably connected to the Buchner funnel (8), a fixing plate (406) is fixedly connected to the insertion tube (401), a first hydraulic rod (407) is fixedly connected to the inside of the test chamber (1), and the telescopic end of the first hydraulic rod (407) is fixedly connected to the fixing plate (406); A filter paper (9) is provided inside the Buchner funnel (8). A fixing structure (5), a weighing structure (6), and a pretreatment structure (7) are provided on the test chamber (1). The placement structure (2) includes a first motor (201) and a connecting shaft (202). The first motor (201) is fixedly connected to the inside of the test chamber (1), the connecting shaft (202) is rotatably connected to the test chamber (1), the output end of the first motor (201) is fixedly connected to the connecting shaft (202), a placement rack (203) is fixedly connected to the top end of the connecting shaft (202), four Buchner funnels (8) are placed on the placement rack (203), four groups of positioning posts (204) are fixedly connected to the placement rack (203), each group of positioning posts (204) has four, four positioning holes (205) are provided on each Buchner funnel (8), and the positioning posts (204) are inserted into the positioning holes (205); A second suction filtration bottle (305) is fixedly connected to the inside of the test chamber (1), a first connecting pipe (304) is fixedly connected between the first suction filtration bottle (301) and the second suction filtration bottle (305), a third connecting pipe (308) is fixedly connected to the second suction filtration bottle (305), a vacuum pump (309) is fixedly connected to the inside of the test chamber (1), and the end of the third connecting pipe (308) is fixedly connected to the air suction end of the vacuum pump (309); The fixed structure (5) includes an upright frame (501) and a gear (502) rotatably connected to the upright frame (501). The upright frame (501) is fixedly connected to the inside of the test box (1). A first rack (503) and a second rack (505) are respectively meshed on both sides of the gear (502). The first rack (503) is fixedly connected to the fixed ring (404). A connecting rod (506) is fixedly connected to the second rack (505). The top end of the connecting rod (506) is fixedly connected to a gland (507). The gland (507) is buckled with the Buchner funnel (8). The weighing structure (6) includes a second hydraulic rod (601) and a mounting plate (602) fixedly connected to the telescopic end of the second hydraulic rod (601). The second hydraulic rod (601) is fixedly connected to the inside of the test box (1). A pressure sensor (603) is fixedly connected to the mounting plate (602). Two fixed seats (604) are fixedly connected to the pressure sensor (603). A screw rod (605) is rotatably connected to one of the fixed seats (604). A guide rod (606) is fixedly connected to the other fixed seat (604). Two insertion strips (608) are threadedly connected to the screw rod (605). The insertion strips (608) are slidably connected to the guide rod (606). Four slots (609) are arranged in a circumferential array on the fixed ring (404). The insertion strips (608) are inserted into the slots (609).

2. The automated plaster gypsum water retention rate testing device according to claim 1, wherein: A pressing plate (303) is fixedly connected to the inside of the test box (1). The pressing plate (303) abuts against the sealing plug (302). A second connecting pipe (306) is installed on the second suction flask (305). A regulating valve (307) is installed on the second connecting pipe (306). A pressure gauge (310) is fixedly connected to the inside of the test box (1). A branch pipe (311) is fixedly connected to the first connecting pipe (304). The end of the branch pipe (311) is fixedly connected to the pressure gauge (310).

3. An automatic water retention rate testing device for plastering gypsum according to claim 1, characterized in that: A guide strip (504) is fixedly connected to the upright frame (501). The second rack (505) is slidably connected to the guide strip (504). Two guide columns (508) are fixedly connected to the bottom end of the gland (507). The guide columns (508) are slidably connected to the test box (1).

4. An automated water retention rate testing device for plastering gypsum according to claim 1, characterized in that: Two slide rails (607) are fixedly connected to the pressure sensor (603). The insertion strips (608) are slidably connected to the slide rails (607). A second motor (610) is fixedly connected to the fixed seat (604). The output end of the second motor (610) is fixedly connected to the screw rod (605).

5. The automated water retention rate testing device for plastering gypsum according to claim 4, characterized in that: The preprocessing structure (7) includes a plurality of columns (701) and a pallet (702) fixedly connected to the plurality of columns (701). The top end of the test box (1) is fixedly connected with a plurality of columns (701). A blanking device housing (703) is fixedly connected to the pallet (702). A third motor (704) is fixedly connected to the pallet (702). A propeller blade (705) is rotatably connected inside the blanking device housing (703). The output end of the third motor (704) is fixedly connected to the propeller blade (705). An inclined discharge pipe (706) is fixedly connected to the blanking device housing (703). The bottom end of the discharge pipe (706) points to one of the Buchner funnels (8).

6. The automated plaster gypsum water retention rate testing device according to claim 5, wherein: A third hydraulic rod (707) is fixedly connected to the pallet (702). The telescopic end of the third hydraulic rod (707) is fixedly connected with a connecting plate (708). A sliding column (709) is fixedly connected to the connecting plate (708). The sliding column (709) is slidably connected to the pallet (702). A fourth motor (710) is fixedly connected to the connecting plate (708). The output end of the fourth motor (710) is fixedly connected with a scraper (711). The scraper (711) is rotatably connected inside one of the Buchner funnels (8).

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