Automatic plastering gypsum water retention rate testing device

Abstract

The invention relates to the technical field of water retention rate testing devices, in particular to an automatic plastering gypsum water retention rate testing device which comprises a testing box, a placing structure, a suction filtration structure, a connecting structure, a fixing structure, a weighing structure, a pretreatment structure, a Buchner funnel and filter paper. The suction filtration structure and the Buchner funnel are connected through the connecting structure, the sealing performance is improved, meanwhile, after the connecting structure is separated from the Buchner funnel, residual water at the bottom end of the Buchner funnel can be erased, and the measurement precision during weighing is improved; the Buchner funnel is placed through the placement structure, meanwhile, filter paper placement, feeding, slicking and suction filtration measurement work are conducted at the same time through cooperation with the pretreatment structure, the automation degree and the measurement efficiency of device measurement are improved, suction filtration operation is conducted on plastering gypsum through the suction filtration structure, and the Buchner funnel which is subjected to suction filtration is fixed through the fixing structure; the plastering gypsum before and after suction filtration is weighed through the weighing structure, and a test result of the water retention rate of the plastering gypsum is obtained.

Description

Technical Field

[0001] The invention relates to the technical field of water retention rate testing devices, in particular to an automatic plastering gypsum water retention rate testing device. Background Art

[0002] As a new type of environmentally friendly building material, plastering gypsum is increasingly used in construction projects. Its water retention rate is one of the key indicators to measure product quality. It has a vital 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, the traditional plastering gypsum water retention rate test device mostly relies on manual operation from the perspective of operation process, such as manually placing filter paper, loading, scraping plastering gypsum samples, and manually controlling the filtration process and weighing process. This is not only cumbersome and inefficient, but also has large differences in manual operation, making it difficult to ensure the consistency of each test condition, resulting in low accuracy and reliability of the test results; The sealing performance of existing test devices is generally poor. During the filtration process, air can easily enter, affecting the filtration effect, making the moisture content of the sample after filtration inaccurate, and ultimately causing a deviation in the calculation of the water retention rate. In addition, the device does not fix key components such as the Büchner funnel well. The Büchner funnel is easy to shake during filtration, which not only affects the normal filtration, but also may cause the sample to spill, resulting in test errors and even damage to the device. The weighing method of the traditional device is not accurate enough and cannot effectively remove the residual moisture at the bottom of the Büchner funnel. This residual moisture will increase the weight during weighing, causing the measurement result to be biased larger, which in turn leads to large errors in the calculation results of the water retention rate and cannot truly reflect the water retention performance of the plaster. Summary of the invention

[0004] In view of the problems in the prior art, the present invention provides an automated plastering gypsum water retention rate testing device.

[0005] The technical solution adopted by the present invention to solve the technical problem is: an automated plaster gypsum water retention rate testing device, comprising a test box, a placement structure arranged on the test box, four Buchner funnels placed on the placement structure, filter paper placed inside the Buchner funnel, a suction filtration structure arranged inside the test box, a connection structure arranged on the suction filtration structure, a fixing structure arranged inside the test box, a weighing structure arranged inside the test box, and a pretreatment structure arranged on the test box; The placement structure includes a first motor and a connecting shaft. The first motor is fixedly connected to the inside of the test box. The connecting shaft is rotatably connected to the test box. The output end of the first motor is fixedly connected to the connecting shaft. The top end of the connecting shaft is fixedly connected to a placement rack. Four Buchner funnels are placed on the placement rack. The suction filtration structure includes a first suction filtration bottle, a sealing plug installed on the first suction filtration bottle, and the first suction filtration bottle is fixedly connected to the interior of the test box; The connection structure includes a cannula and a first sealing gasket fixedly connected to the cannula, the cannula is slidably connected to the sealing plug, the first sealing gasket is in conflict with the sealing plug, the top of the cannula is fixedly connected to a second sealing gasket, the Buchner funnel is fixedly connected to a fixing ring, the second sealing gasket is in conflict with the fixing ring, a sponge sleeve is provided inside the cannula, the sponge sleeve is slidably connected to the Buchner funnel, a fixing plate is fixedly connected to the cannula, a first hydraulic rod is fixedly connected to the inside of the test box, and the telescopic end of the first hydraulic rod is fixedly connected to the fixing plate.

[0006] Specifically, four groups of positioning columns are fixedly connected to the placement rack, each group of positioning columns is provided with four positioning columns, and each of the Buchner funnels is provided with four positioning holes, and the positioning columns are plugged into the positioning holes.

[0007] Specifically, a second suction bottle is fixedly connected to the inside of the test box, a first connecting tube is fixedly connected between the first suction bottle and the second suction bottle, a third connecting tube is fixedly connected to the second suction bottle, a vacuum pump is fixedly connected to the inside of the test box, and an end of the third connecting tube is fixedly connected to the exhaust end of the vacuum pump.

[0008] Specifically, a pressure plate is fixedly connected to the inside of the test box, and the pressure plate is in contact with the sealing plug. A second connecting pipe is installed on the second suction bottle, and a regulating valve is installed on the second connecting pipe. A pressure gauge is fixedly connected to the inside of the test box, and a branch pipe is fixedly connected to the first connecting pipe, and the end of the branch pipe is fixedly connected to the pressure gauge.

[0009] Specifically, the fixed structure includes a stand and a gear rotatably connected to the stand. The stand is fixedly connected to the inside of the test box. A first rack and a second rack are respectively meshed on both sides of the gear. The first rack is fixedly connected to a fixed ring. A connecting rod is fixedly connected to the second rack. A pressure cover is fixedly connected to the top of the connecting rod. The pressure cover is buckled with a Buchner funnel.

[0010] Specifically, a guide bar is fixedly connected to the stand, the second rack is slidably connected to the guide bar, the bottom end of the gland is fixedly connected to two guide posts, and the guide posts are slidably connected to the test box.

[0011] 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 interior of the test box is fixedly connected to the second hydraulic rod, a pressure sensor is fixedly connected to the mounting plate, two groups of fixed seats are fixedly connected to the pressure sensor, one group of the fixed seats is rotatably connected to a screw rod, and the other group of the fixed seats is fixedly connected to a guide rod, two insertion strips are threadedly connected to the screw rod, the insertion strips are slidably connected to the guide rod, and four slots are provided in a circular array on the fixing ring, and the insertion strips are plugged into the slots.

[0012] Specifically, two slide rails are fixedly connected to the pressure sensor, the insert is slidably connected to the slide rails, a second motor is fixedly connected to the fixing seat, and an output end of the second motor is fixedly connected to a screw rod.

[0013] 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 the plurality of columns, a feeder housing is fixedly connected to the support plate, a third motor is fixedly connected to the support plate, the interior of the feeder housing is rotatably connected to propeller blades, the output end of the third motor is fixedly connected to the propeller blades, an inclined discharge pipe is fixedly connected to the feeder housing, and the bottom end of the discharge pipe points to one of the Buchner funnels.

[0014] Specifically, a third hydraulic rod is fixedly connected to the support plate, a telescopic end of the third hydraulic rod is fixedly connected to a connecting plate, a sliding column is fixedly connected to the connecting plate, the sliding column is slidably connected to the support plate, a fourth motor is fixedly connected to the connecting plate, a scraper is fixedly connected to the output end of the fourth motor, and the scraper is rotatably connected to the inside of one of the Buchner funnels.

[0015] The beneficial effects of the present invention are: (1) The present invention discloses an automated plaster gypsum water retention rate testing device, wherein a placement structure is provided on the test box, a Büchner funnel is provided on the placement structure, a filtration structure is provided inside the test box, a connecting structure is provided on the filtration structure, and the filtration structure and the Büchner funnel are connected via the connecting structure, thereby improving the sealing performance and the filtration effect. Meanwhile, when the connecting structure is separated from the Büchner funnel, the residual water at the bottom of the Büchner funnel can be wiped off, thereby improving the measurement accuracy during weighing and the accuracy of the water retention rate test of the device.

[0016] (2) The automated plastering gypsum water retention rate testing device described in the present invention places a Büchner funnel through a placement structure, and is convenient for placing filter paper, loading, scraping and filtration measurement at the same time, thereby improving the degree of automation and measurement efficiency of the device. The plastering gypsum is filtered through the filtration structure, which facilitates the measurement of the water retention rate of the plastering gypsum.

[0017] (3) The automated plastering gypsum water retention rate testing device described in the present invention has a fixing structure on the test box, which fixes the Büchner funnel during filtration, thereby improving the stability of the Büchner funnel during filtration.

[0018] (4) The present invention discloses an automated plastering gypsum water retention rate testing device, wherein a weighing structure is provided on the test box, and the plastering gypsum before and after filtration is weighed by the weighing structure, and the data is directly transmitted to the intelligent terminal for analysis and calculation to obtain the test result of the plastering gypsum water retention rate.

[0019] (5) The present invention discloses an automated plastering gypsum water retention rate testing device, wherein a pretreatment structure is provided on the test box, and the plastering gypsum loading and leveling operations are realized through the pretreatment structure, thereby improving the degree of automation of the plastering gypsum water retention rate measurement. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0021] Figure 1 A schematic diagram of the overall structure of a preferred embodiment of an automated plastering gypsum water retention rate testing device provided by the present invention; Figure 2 for Figure 1 An enlarged schematic diagram of the structure of section A is shown; Figure 3 It is a schematic diagram of the connection structure between the cannula and the suction filtration structure of the present invention; Figure 4 for Figure 3 An enlarged schematic diagram of the structure of part B is shown; Figure 5 for Figure 3 An enlarged schematic diagram of the C-section structure is shown; Figure 6 for Figure 3 An enlarged schematic diagram of the D-section structure is shown; Figure 7 It is a schematic diagram of the connection structure between the third hydraulic rod and the connection plate of the present invention; Figure 8 It is a schematic diagram of the connection structure between the fourth motor and the scraper of the present invention; Fig. 9 for Figure 8 An enlarged schematic diagram of the E-section structure is shown.

[0022] In the figure: 1. test box; 2. placement structure; 201. first motor; 202. connecting shaft; 203. placement rack; 204. positioning column; 205. positioning hole; 3. filtration structure; 301. first filtration bottle; 302. sealing plug; 303. pressing plate; 304. first connecting pipe; 305. second filtration bottle; 306. second connecting pipe; 307. regulating valve; 308. third connecting pipe; 309. vacuum pump; 310. pressure gauge; 311. branch pipe; 4. connection structure; 401. intubation; 402. first sealing pad; 403. second sealing pad; 404. fixing ring; 405. sponge cover; 406. fixing plate; 407. first hydraulic rod; 5. fixing structure; 501. stand; 502. gear ;503, first rack;504, guide bar;505, second rack;506, connecting rod;507, pressure cover;508, guide column;6, weighing structure;601, second hydraulic rod;602, mounting plate;603, pressure sensor;604, fixing seat;605, screw;606, guide rod;607, slide rail;608, insert;609, slot;610, second motor;7, pretreatment structure;701, column;702, support plate;703, feeder housing;704, third motor;705, propeller blade;706, discharge pipe;707, third hydraulic rod;708, connecting plate;709, slide column;710, fourth motor;711, scraper;8, Buchner funnel;9, filter paper. DETAILED DESCRIPTION

[0023] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0024] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Fig. 9 As shown, an automated plaster gypsum water retention rate testing device of the present invention comprises a test box 1, a placement structure 2 arranged on the test box 1, four Buchner funnels 8 placed on the placement structure 2, filter paper 9 placed inside the Buchner funnel 8, a suction filtration structure 3 arranged inside the test box 1, a connection structure 4 arranged on the suction filtration structure 3, a fixing structure 5 arranged inside the test box 1, a weighing structure 6 arranged inside the test box 1, and a pretreatment structure 7 arranged on the test box 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 box 1. 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. The top of the connecting shaft 202 is fixedly connected to a placement rack 203. Four Buchner funnels 8 are placed on the placement rack 203. The filtration structure 3 includes a first filtration bottle 301 and a sealing plug 302 installed on the first filtration bottle 301. The first filtration bottle 301 is fixedly connected to the interior of the test box 1. The connection structure 4 includes a cannula 401 and a first sealing gasket 402 fixedly connected to the cannula 401, the cannula 401 is slidably connected to the sealing plug 302, the first sealing gasket 402 conflicts with the sealing plug 302, the top of the cannula 401 is fixedly connected to a second sealing gasket 403, the Buchner funnel 8 is fixedly connected to a fixing ring 404, the second sealing gasket 403 conflicts with the fixing ring 404, and a sponge sleeve 405 is provided inside the cannula 401. The sponge sleeve 405 is slidably connected to the Büchner funnel 8, the insert tube 401 is fixedly connected to a fixing plate 406, the interior of the test box 1 is fixedly connected to a first hydraulic rod 407, and the telescopic end of the first hydraulic rod 407 is fixedly connected to the fixing plate 406; when the Büchner funnel 8 with the scraped plaster is rotated to the top of the weighing structure 6, the weighing structure 6 is started to weigh the initial weight of the Büchner funnel 8 and the internal plaster, and after the weighing is completed, the weighing structure 6 is returned. Then, the first hydraulic rod 407 can be started, and the first hydraulic rod 407 extends to drive the fixed plate 406 to rise, and the fixed plate 406 rises to drive the cannula 401 to rise, and the top of the cannula 401 fits with the fixed ring 404 on the Buchner funnel 8, and the cannula 401 and the fixed ring 404 are sealed by the second sealing gasket 403. At the same time, the first sealing gasket 402 at the bottom of the cannula 401 is sealed with the sealing plug 302 of the first suction filtration bottle 301. At the same time, the rise of the fixed plate 406 can also drive the fixed structure 5 The fixed structure 5 fixes the Büchner funnel 8, and then the filtration structure 3 is started to filter the plaster inside the Büchner funnel 8. When the weight after filtration needs to be weighed, the first hydraulic rod 407 needs to be retracted first. When the first hydraulic rod 407 drives the fixed plate 406 and the insert tube 401 to descend together, the sponge sleeve 405 on the insert tube 401 descends to wipe off the residual water on the Büchner funnel 8, and then the Büchner funnel 8 is weighed through the weighing structure 6, which improves the accuracy of weighing.

[0025] Specifically, Figure 1 , Figure 2 , Figure 3 , Figure 6 , Figure 7 , Figure 8 and Fig. 9As shown, four groups of positioning columns 204 are fixedly connected to the placement rack 203, and each group of positioning columns 204 is provided with four, and each of the Buchner funnels 8 is provided with four positioning holes 205, and the positioning columns 204 are plugged into the positioning holes 205; a second suction bottle 305 is fixedly connected to the inside of the test box 1, a first connecting pipe 304 is fixedly connected between the first suction bottle 301 and the second suction bottle 305, and a third connecting pipe 308 is fixedly connected to the second suction bottle 305, and a vacuum pump 309 is fixedly connected to the inside of the test box 1, and the end of the third connecting pipe 308 is fixedly connected to the exhaust end of the vacuum pump 309; A pressure plate 303 is fixedly connected to the inside of the test box 1, and the pressure plate 303 contacts the sealing plug 302. A second connecting pipe 306 is installed on the second suction filter bottle 305, and 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, and a branch pipe 311 is fixedly connected to the first connecting pipe 304, and the end of the branch pipe 311 is fixedly connected to the pressure gauge 310. When the plaster inside the Büchner funnel 8 on the left is filtering, the Büchner funnel 8 and the plaster in front that have been tested can be taken off from the placement rack 203 for cleaning and replacement, and then the new cloth can be replaced. The Büchner funnel 8 is placed on the hole in front of the placement rack 203. The positioning column 204 and the positioning hole 205 improve the stability of the Büchner 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 plaster into the newly replaced Büchner funnel 8 on the right. At the same time, the pretreatment structure 7 will scrape the newly loaded plaster in the rear Büchner funnel 8, thereby improving the efficiency of the measurement work. After the measurement is completed after the filtration, 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 ninety degrees, and then the replacement is repeated. The Büchner funnel 8, the filter paper 9, the loading and leveling process operations are performed. During the filtration, the vacuum pump 309 is started. The vacuum pump 309 evacuates the second filtration bottle 305 through the third connecting tube 308. The second filtration bottle 305 evacuates the first filtration bottle 301 through the first connecting tube 304. The first filtration bottle 301 performs the filtration operation on the Büchner funnel 8 through the cannula 401. Before the filtration, the regulating valve 307 is turned to adjust the mercury column difference in the U-shaped pressure gauge 310 to between 395-405mm or adjust the negative pressure of the pressure gauge 310 to between 52.67-54kPa within 30s. The filtration is performed for 20min, and then the weighing operation is performed.

[0026] Specifically, Figure 1 , Figure 3 , Figure 4 , Figure 7 and Figure 8As shown, the fixed structure 5 includes a stand 501 and a gear 502 rotatably connected to the stand 501, the inside of the test box 1 is fixedly connected to the stand 501, and the first rack 503 and the second rack 505 are respectively meshed on both sides of the gear 502, the first rack 503 is fixedly connected to the fixing ring 404, the second rack 505 is fixedly connected to a connecting rod 506, the top of the connecting rod 506 is fixedly connected to a gland 507, and the gland 507 is buckled with the Buchner funnel 8; the stand 501 is fixedly connected to a guide bar 504, the second rack 505 is slidably connected to the guide bar 504, the bottom end of the gland 507 is fixedly connected to two guide posts 508, and the guide posts 508 are slidably connected to the test box 1; when the cannula 401 When the fixed plate 406 moves 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 descent of the second rack 505 drives the connecting rod 506 to descend. The descent of the connecting rod 506 drives the pressure cover 507 to descend. The pressure cover 507 is then engaged with the Büchner funnel 8 that is ready for filtration, thereby improving the stability of the Büchner funnel 8. When the filtration is completed, the cannula 401 descends to be separated from the bottom end of the Büchner funnel 8, which will drive the pressure cover 507 to rise at the same time. The pressure cover 507 is separated from the Büchner funnel 8 to avoid blocking the Büchner funnel 8 and affecting the rotation of the Büchner funnel 8. The setting of the guide column 508 improves the stability of the up and down movement of the pressure cover 507, and the setting of the guide bar 504 improves the sliding stability of the second rack 505.

[0027] Specifically, Figure 1 , Figure 2 , Figure 5 and Fig. 9As shown, 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 interior 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 groups of fixing seats 604 are fixedly connected to the pressure sensor 603. One group of the fixing seats 604 is rotatably connected to a screw rod 605, and the other group of the fixing seats 604 is fixedly connected to a guide rod 606. Two inserts 608 are threadedly connected to the screw 605. The inserts 608 are slidably connected to the guide rod 606. The fixing ring 404 is The circular array is provided with four slots 609, and the insert strips 608 are plugged into the slots 609; the pressure sensor 603 is fixedly connected with two slide rails 607, and the insert strips 608 are slidably connected with the slide rails 607, and the fixed seat 604 is fixedly connected with a second motor 610, and the output end of the second motor 610 is fixedly connected with the screw 605; before filtration, when the scraped plaster and the Buchner funnel 8 are rotated to the top of the weighing structure 6, the second hydraulic rod 601 is started, and the second hydraulic rod 601 is extended to drive the mounting plate 602 to rise, and the mounting plate 602 rises to drive the pressure sensor 603 to rise, and when the pressure sensor 603 rises to the setting After the height is determined, the second motor 610 is started, and the second motor 610 drives the screw 605 to rotate. The threads at both ends of the screw 605 are in opposite directions. The screw 605 threads drive the two inserts 608 to slide toward each other, and then insert them into the two slots 609 on the fixed ring 404. The setting of the guide rod 606 and the slide rail 607 improves the sliding stability of the insert 608. After the insert 608 is inserted into the slot 609, the second hydraulic rod 601 continues to extend, and 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 Buchner funnel 8. At this time, the pressure sensor 603 is fully stressed, and the pressure sensor 6 03 transmits the initial pressure data to the intelligent terminal. After the weighing is completed, start the second motor 610 to drive the two inserts 608 to separate from the slots 609, and then retract the second hydraulic rod 601 to the initial position, and then perform the filtration operation. After the filtration is completed, repeat the weighing operation, measure the weight of the plaster after filtration, and transmit the data to the intelligent terminal. The water retention rate of the plaster is calculated by 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 of the lowest end of the Buchner funnel 8 to avoid affecting the placement structure 2 to drive the Buchner funnel 8 to switch the operating position.

[0028] Specifically, Figure 1 , Figure 3 , Figure 7 and Figure 8As shown, the pretreatment structure 7 includes a plurality of columns 701 and a support plate 702 fixedly connected to the plurality of columns 701, a plurality of columns 701 are fixedly connected to the top of the test box 1, a feeder housing 703 is fixedly connected to the support plate 702, a third motor 704 is fixedly connected to the support plate 702, a propeller blade 705 is rotatably connected to the inside of the feeder housing 703, an 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 feeder housing 703, and 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 support plate 702, a connecting plate 708 is fixedly connected to the telescopic end of the third hydraulic rod 707, a sliding column 709 is fixedly connected to the connecting plate 708, the sliding column 709 is slidably connected to the support plate 702, a fourth motor 710 is fixedly connected to the connecting plate 708, and the fourth motor The output end of 710 is fixedly connected with a scraper 711, and the scraper 711 is rotatably connected to the inside of one of the Buchner funnels 8; when the plastering gypsum is fed, the third motor 704 is started, and the third motor 704 drives the propeller blade 705 to rotate, and the plastering gypsum in the feeder housing 703 spirally descends to the discharge pipe 706 for discharge, and the plastering gypsum flows from the discharge pipe 706 into the Buchner funnel 8 on the right, and at the same time, the third hydraulic rod 707 on the support plate 702 can be retracted, and the third hydraulic rod 707 on the support plate 702 can be retracted. The pressure rod 707 drives the connecting plate 708 to descend, and the descending connecting plate 708 drives the fourth motor 710 and the scraper 711 to descend, and the scraper 711 enters into the rear Buchner funnel 8, and then the fourth motor 710 is started, and the fourth motor 710 is started to drive the scraper 711 to rotate, and the scraper 711 then scrapes the plaster inside the Buchner funnel 8 flat, and then the third hydraulic rod 707 is started to drive the scraper 711 to separate from the Buchner funnel 8 to avoid affecting the conversion of the measuring operation station of the Buchner funnel 8.

[0029] When the present invention is used, first, when the Buchner funnel 8 with the plaster that has been scraped flat rotates to the top of the weighing structure 6, the weighing structure 6 is started to weigh the initial weight of the Buchner funnel 8 and the internal plaster. After the weighing is completed, the weighing structure 6 is returned, and then the first hydraulic rod 407 can be started. The first hydraulic rod 407 extends to drive the fixed plate 406 to rise. The rise of the fixed plate 406 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 403 at the bottom of the insertion tube 401 is sealed. The pad 402 is sealed with the sealing plug 302 of the first suction filtration bottle 301. At the same time, the rise of the fixed plate 406 can also drive the fixed structure 5 to descend. The fixed structure 5 fixes the Büchner funnel 8, and then the suction filtration structure 3 is started to filter the plaster inside the Büchner funnel 8. When the weight after filtration needs to be weighed, the first hydraulic rod 407 needs to be retracted first. When the first hydraulic rod 407 drives the fixed plate 406 and the cannula 401 to descend together, the sponge sleeve 405 on the cannula 401 descends to wipe the residual water on the Büchner funnel 8, and then the Büchner funnel 8 is weighed by the weighing structure 6, which improves the accuracy of weighing; Then, when the plastering gypsum inside the left Büchner funnel 8 is undergoing the filtration work, the tested Büchner funnel 8 and the plastering gypsum in the front can be removed from the placement rack 203 for cleaning and replacement, and then the new Büchner funnel 8 can be placed on the hole in front of the placement rack 203. The setting of the positioning column 204 and the positioning hole 205 improves the stability of the Büchner 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 will load the mixed plastering gypsum into the Büchner funnel 8 that has just been replaced on the right. At the same time, the pretreatment structure 7 will scrape the plastering gypsum that has just been loaded in the rear Büchner funnel 8, thereby improving the efficiency of the measurement work. When the measurement after filtration is completed, the first motor 201 is started. The first motor 201 drives The movable connecting shaft 202 rotates, and the connecting shaft 202 rotates to drive the placement rack 203 to rotate ninety degrees, and then the processes of replacing the Buchner funnel 8, placing the filter paper 9, loading and leveling are repeated. During the filtration, the vacuum pump 309 is started, and the vacuum pump 309 evacuates the second filtration bottle 305 through the third connecting pipe 308, and the second filtration bottle 305 evacuates the first filtration bottle 301 through the first connecting pipe 304, and the first filtration bottle 301 performs the filtration operation on the Buchner funnel 8 through the cannula 401. At the same time, before the filtration, the regulating valve 307 is rotated, and the mercury column difference in the U-shaped pressure gauge 310 is adjusted to between 395-405mm or the negative pressure of the pressure gauge 310 is adjusted to between 52.67-54kPa within 30s, and the filtration is carried out for 20min, and then the weighing operation is carried out; Secondly, when the cannula 401 and the fixed 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, and the gear 502 rotates to drive the second rack 505 to descend. The descent of the second rack 505 drives the connecting rod 506 to descend, and the descent of the connecting rod 506 drives the pressure cover 507 to descend. The pressure cover 507 is then engaged with the Buchner funnel 8 that is being prepared for filtration, thereby improving the stability of the Buchner funnel 8. When the filtration is completed, the cannula 401 descends to be separated from the bottom end of the Buchner funnel 8, and at the same time, the pressure cover 507 is driven to rise. The pressure cover 507 is separated from the Buchner funnel 8 to avoid blocking the Buchner funnel 8 and affecting the rotation of the Buchner funnel 8. The setting of the guide column 508 improves the stability of the up and down movement of the pressure cover 507, and the setting of the guide bar 504 improves the sliding stability of the second rack 505. Then, before filtration, when the scraped plaster and the Buchner funnel 8 are rotated to the top of the weighing structure 6, the second hydraulic rod 601 is started, and the second hydraulic rod 601 is extended to drive the mounting plate 602 to rise, and the mounting plate 602 rises and drives the pressure sensor 603 to rise. When the pressure sensor 603 rises to the set height, the second motor 610 is started, and the second motor 610 drives the screw 605 to rotate. The threads at both ends of the screw 605 are in opposite directions. The screw 605 threads drive the two insertion strips 608 to slide toward each other, and then insert them into the two slots 609 on the fixing ring 404. The setting of the guide rod 606 and the slide rail 607 improves the sliding stability of the insertion strip 608. After the insertion strip 608 is inserted into the slot 609, the second hydraulic rod 601 is continued to be extended, and the second hydraulic rod 601 drives the fixing ring 40 4 and the Buchner funnel 8 rise until the placement frame 203 no longer bears the weight of the Buchner funnel 8. At this time, the pressure sensor 603 is fully stressed, and the pressure sensor 603 transmits the initial pressure data it bears to the intelligent terminal. After the weighing is completed, the second motor 610 is started to drive the two inserts 608 to separate from the slots 609, and then the second hydraulic rod 601 is retracted to the initial position, and then the filtration operation is performed. After the filtration is completed, the weighing operation is repeated to measure the weight of the plastering gypsum after filtration, and the data is transmitted to the intelligent terminal. The water retention rate of the plastering gypsum is calculated by 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 placement structure 2 driving the Buchner funnel 8 to switch the operator; Finally, when the plastering gypsum is loaded, the third motor 704 is started, and the third motor 704 drives the propeller blade 705 to rotate. The plastering gypsum inside the feeder housing 703 spirally descends to the discharge pipe 706 for unloading, and 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 support plate 702 can be retracted, and 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, and the scraper 711 enters the Buchner funnel 8 at the rear, and then the fourth motor 710 is started. The fourth motor 710 starts and drives the scraper 711 to rotate, and the scraper 711 then scrapes the plastering gypsum inside the Buchner funnel 8 flat, and then the third hydraulic rod 707 is started to drive the scraper 711 to separate from the Buchner funnel 8 to avoid affecting the conversion of the measuring operation station of the Buchner funnel 8.

[0030] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0031] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. An automated plastering gypsum water retention test device, characterized in that: It comprises a test box (1), a placement structure (2) arranged on the test box (1), a filtration structure (3) arranged inside the test box (1), and a connection structure (4) arranged on the filtration structure (3); The filtration structure (3) comprises a first filtration bottle (301) and a sealing plug (302) installed on the first filtration bottle (301), and the interior of the test box (1) is fixedly connected to the first filtration bottle (301); The connection structure (4) comprises a cannula (401) and a first sealing gasket (402) fixedly connected to the cannula (401); the cannula (401) is slidably connected to the sealing plug (302); the first sealing gasket (402) contacts the sealing plug (302); a second sealing gasket (403) is fixedly connected to the top of the cannula (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) contacts the fixing ring (404); a sponge sleeve (405) is provided inside the cannula (401); the sponge sleeve (405) is slidably connected to the Buchner funnel (8); a fixing plate (406) is fixedly connected to the cannula (401); a first hydraulic rod (407) is fixedly connected to the inside of the test box (1); and a telescopic end of the first hydraulic rod (407) is fixedly connected to the fixing plate (406).

2. An automated plastering gypsum water retention rate testing device according to claim 1, characterized in that: The Büchner funnel (8) is provided with filter paper (9) inside, the test box (1) is provided with a fixing structure (5), a weighing structure (6) and a pretreatment structure (7), the placement structure (2) comprises a first motor (201) and a connecting shaft (202), the first motor (201) is fixedly connected inside the test box (1), 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), the top end of the connecting shaft (202) is fixedly connected to a placement rack (203), four Büchner funnels (8) are placed on the placement rack (203), four groups of positioning columns (204) are fixedly connected to the placement rack (203), each group of positioning columns (204) is provided with four, each of the Büchner funnels (8) is provided with four positioning holes (205), and the positioning columns (204) are plugged into the positioning holes (205).

3. An automated plastering gypsum water retention rate testing device according to claim 2, characterized in that: A second suction bottle (305) is fixedly connected inside the test box (1), a first connecting pipe (304) is fixedly connected between the first suction bottle (301) and the second suction bottle (305), a third connecting pipe (308) is fixedly connected to the second suction bottle (305), a vacuum pump (309) is fixedly connected inside the test box (1), and an end of the third connecting pipe (308) is fixedly connected to an exhaust end of the vacuum pump (309).

4. An automated plastering gypsum water retention rate testing device according to claim 3, characterized in that: A pressure plate (303) is fixedly connected to the interior of the test box (1), the pressure plate (303) abuts against the sealing plug (302), a second connecting pipe (306) is installed on the second suction filtration bottle (305), a regulating valve (307) is installed on the second connecting pipe (306), a pressure gauge (310) is fixedly connected to the interior of the test box (1), a branch pipe (311) is fixedly connected to the first connecting pipe (304), and an end of the branch pipe (311) is fixedly connected to the pressure gauge (310).

5. The automated plastering gypsum water retention rate testing device according to claim 2, characterized in that: The fixed structure (5) comprises a stand (501) and a gear (502) rotatably connected to the stand (501); the stand (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 a fixing ring (404); a connecting rod (506) is fixedly connected to the second rack (505); a pressure cover (507) is fixedly connected to the top end of the connecting rod (506); and the pressure cover (507) is buckled with the Buchner funnel (8).

6. An automated plastering gypsum water retention rate testing device according to claim 5, characterized in that: A guide bar (504) is fixedly connected to the stand (501), the second rack (505) is slidably connected to the guide bar (504), the bottom end of the gland (507) is fixedly connected to two guide posts (508), and the guide posts (508) are slidably connected to the test box (1).

7. An automated plastering gypsum water retention rate testing device according to claim 2, characterized in that: The weighing structure (6) comprises a second hydraulic rod (601) and a mounting plate (602) fixedly connected to the telescopic end of the second hydraulic rod (601); the interior 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 groups of fixing seats (604) are fixedly connected to the pressure sensor (603); one group of the fixing seats (604) is rotatably connected to a screw rod (605); the other group of the fixing seats (604) is fixedly connected to a guide rod (606); two inserts (608) are threadedly connected to the screw rod (605); the inserts (608) are slidably connected to the guide rod (606); four slots (609) are arranged in a circumferential array on the fixing ring (404); the inserts (608) are plugged into the slots (609).

8. An automated plastering gypsum water retention rate testing device according to claim 7, characterized in that: Two slide rails (607) are fixedly connected to the pressure sensor (603), the insert (608) is slidably connected to the slide rails (607), a second motor (610) is fixedly connected to the fixing seat (604), and an output end of the second motor (610) is fixedly connected to the screw rod (605).

9. An automated plastering gypsum water retention rate testing device according to claim 8, characterized in that: The pretreatment structure (7) comprises a plurality of columns (701) and a support plate (702) fixedly connected to the plurality of columns (701); the top of the test box (1) is fixedly connected to the plurality of columns (701); the support plate (702) is fixedly connected to a feeder housing (703); the support plate (702) is fixedly connected to a third motor (704); the feeder housing (703) is internally rotatably connected to a propeller blade (705); 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 feeder housing (703); the bottom end of the discharge pipe (706) points to one of the Buchner funnels (8).

10. An automated plastering gypsum water retention rate testing device according to claim 9, characterized in that: A third hydraulic rod (707) is fixedly connected to the support plate (702); a telescopic end of the third hydraulic rod (707) is fixedly connected to 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 support plate (702); a fourth motor (710) is fixedly connected to the connecting plate (708); an output end of the fourth motor (710) is fixedly connected to a scraper (711); and the scraper (711) is rotatably connected to the interior of one of the Buchner funnels (8).

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