Device and method for measuring humidity deformation of phosphogypsum-based materials

Abstract

The present invention provides a device and method for measuring humidity deformation of phosphogypsum-based materials. At least two expansion detection rings with semicircular ring structures are arranged inside a box body. The expansion detection rings are slidably connected to the box body. A plurality of first displacement sensors are arranged on the inner surface of the expansion detection rings. A height detection plate is also arranged inside the box body. The height detection plate is slidably connected to the box cover of the box body. A plurality of second displacement sensors are arranged on the height detection plate. The plurality of second displacement sensors and the plurality of first displacement sensors are electrically connected to a data acquisition computer. The device can effectively measure humidity deformation of phosphogypsum-based base materials. The device is simple and easy to operate. The problem that the volume deformation of phosphogypsum-based base materials under different humidity is solved. The device is suitable for laboratory scientific research measurement.

Description

Technical Field

[0001] The invention relates to the field of phosphogypsum base material measurement, and in particular to a device and method for measuring humidity deformation of phosphogypsum-based materials. Background Art

[0002] Phosphogypsum has unique compression properties different from soil and can be used as a road base material. It also has a certain solubility. Any dilution with water will change the physical properties of phosphogypsum. In the prior art, it is difficult to measure the volume deformation of phosphogypsum-based road base materials under different temperature and humidity changes. The volume stability of phosphogypsum-based road base materials affects subsequent engineering applications. Therefore, how to measure the humidity deformation of phosphogypsum-based road base materials efficiently, accurately and quickly in terms of devices or measurement methods, and adjust the mix ratio in time is an urgent problem to be solved. Summary of the invention

[0003] The main purpose of the present invention is to provide a device and method for measuring humidity deformation of phosphogypsum-based materials, so as to solve the problem that it is difficult to measure the volume deformation of phosphogypsum-based road base materials under different temperature and humidity changes.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is: a device for measuring humidity deformation of phosphogypsum-based materials, at least two expansion detection rings with semicircular ring structures are provided inside the box body, the expansion detection rings are slidably connected to the box body, and a plurality of first displacement sensors are provided on the inner surface of the expansion detection rings. A height detection plate is also provided inside the box body, the height detection plate is slidably connected to the box cover of the box body, and a plurality of second displacement sensors are provided on the height detection plate. The plurality of second displacement sensors and the plurality of first displacement sensors are electrically connected to a data acquisition computer.

[0005] In a preferred embodiment, the expansion detection ring is slidably connected to the side wall of the box body through a sliding rod, a first sliding sleeve is provided on the side wall of the box body, and the sliding rod is slidably connected to the first sliding sleeve.

[0006] In a preferred solution, a first fixing nut is provided on the first sliding sleeve, and the first fixing nut passes through the first sliding sleeve and abuts against the sliding rod.

[0007] In the preferred embodiment, a second sliding sleeve is provided on the box body, the height detection plate is slidably connected to the second sliding sleeve through an adjusting rod, a second fixing nut is provided on the second sliding sleeve, and the second fixing nut passes through the second sliding sleeve and abuts against the adjusting rod.

[0008] In a preferred embodiment, a digital display is also provided on the box, and the digital display is electrically connected to the plurality of first displacement sensors and the plurality of second displacement sensors.

[0009] In the preferred embodiment, a humidity sensor is also provided inside the box, and the humidity sensor is electrically connected to the digital display meter.

[0010] In the preferred embodiment, a humidity controller is also provided, and the humidity controller is communicated with the interior of the box.

[0011] In a preferred embodiment, a bearing platform is further provided at the bottom of the box body, and a detachable positioning ring is provided on the bearing platform, and the specimen body is positioned and placed on the bearing platform through the positioning ring.

[0012] In the preferred embodiment, a fixing ring is provided on the surface of the positioning ring, a positioning groove is provided on the bearing platform, the fixing ring is arranged in the positioning groove, and a guiding inclined surface is also provided on the opening above the positioning ring.

[0013] The measurement methods include:

[0014] S1. Mix phosphogypsum and graded crushed stone in proportion to form a specimen body, make a specimen with a diameter and height of 150-160 mm, and then measure the deformation after moisturizing and curing for 7 days;

[0015] S2. First, clamp the fixing ring of the positioning ring in the positioning groove. After the positioning ring is positioned, the specimen is positioned on the bearing platform through the positioning ring.

[0016] S3, the expansion detection ring on one side of the box body is close to the specimen body, and the first displacement sensor inside the expansion detection ring is against the surface of the specimen body. After all the first displacement sensors generate displacement data, the displacement data generated by all the first displacement sensors are adjusted to zero on the digital display. The expansion detection ring on the other side of the box body is operated in the same way;

[0017] S4, after the expansion detection rings on both sides of the box body are against the specimen body, the expansion detection rings on both sides are fixed by using the first fixing nut;

[0018] S5. The box cover is placed on the box body, and the transparent glass on one side of the box body is used to observe the position of the height detection plate. The second displacement sensor on the height detection plate is placed against the upper surface of the specimen body. The displacement data generated by the second displacement sensor is displayed on the digital display. The displacement data generated by all the second displacement sensors on the digital display are adjusted to zero.

[0019] S6. The humidity inside the box is adjusted by the humidity controller. The humidity sensor detects the humidity inside the box. The humidity inside the box is 40-50%;

[0020] S7. The data acquisition computer inputs the height H1 and diameter D1 of the test piece, and the multiple first displacement sensors of the expansion detection rings on both sides detect the expansion data of the test piece:

[0021] The detection method is: the expansion detection rings on both sides are symmetrical first displacement sensors, and the symmetrical first displacement sensors are in the same plane, and the sum of the displacement data detected by the two symmetrical first displacement sensors is:

[0022] L1+L2=L;

[0023] Where: L1 is the displacement distance detected by displacement sensor A, L2 is the displacement distance detected by displacement sensor B, and L is the sum of the displacements of displacement sensor A and displacement sensor B;

[0024] The second displacement sensor detects expansion data of the test piece in a height direction, and the displacement data detected by the second displacement sensor is N.

[0025] S8. The diameter D2 of the specimen after the change is: D2 = L + D1;

[0026] The height of the specimen after the change is: H2 = N + H1;

[0027] The volume change of the specimen is:

[0028]

[0029] Where: D2 is the diameter of the specimen after the change, H2 is the height of the specimen after the change;

[0030] S9. The digital meter stores the readings on the data acquisition computer through the data line. The readings are calculated by the volume calculation program for multiple measurements to get the average value and reflected on the digital meter.

[0031] The present invention provides a device and method for measuring humidity deformation of phosphogypsum-based materials. The device and method for measuring humidity deformation of phosphogypsum-based stable materials are as follows. The test piece is placed on a test piece bearing table in the device, a humidity control device adjusts different humidity levels, and a humidity sensor detects the humidity in the device. After the set humidity is reached, the round tubes on the left and right sides approach the test piece under the action of a slide rail, and the metal probes in the round tubes detect and record the volume changes of the test piece. The humidity deformation of the phosphogypsum-based materials can be measured more accurately, thereby avoiding interference during manual readings. The material mix ratio can be adjusted better and in a timely manner. The device can effectively measure the humidity deformation of phosphogypsum-based base materials, the device is simple, and the operation is convenient, which solves the problem that the volume deformation of phosphogypsum-based base materials at different humidity levels is difficult to measure. It is suitable for laboratory scientific research determination. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The present invention will be further described below in conjunction with the accompanying drawings and embodiments:

[0033] Figure 1 It is the overall system diagram of the present invention;

[0034] Figure 2 This is a structural diagram of the expansion detection ring and the height detection plate of the present invention;

[0035] Figure 3 This is a top view of the expansion detection ring of the present invention;

[0036] Figure 4 This is a diagram of the installation structure of the positioning ring of the present invention;

[0037] Figure 5 This is a positioning structure diagram of the positioning ring of the present invention;

[0038] Figure 6 It is a structural diagram of the positioning ring of the present invention after being disassembled.

[0039] In the figure: box body 1; box cover 101; expansion detection ring 2; first displacement sensor 3; sliding rod 4; digital display 5; humidity controller 6; bearing platform 7; positioning ring 701; fixing ring 702; positioning groove 703; data acquisition computer 8; handle 9; humidity sensor 10; specimen body 11; first sliding sleeve 12; first fixing nut 13; height detection plate 14; second displacement sensor 15; second fixing nut 16; second sliding sleeve 17; adjustment rod 18. DETAILED DESCRIPTION

[0040] Example 1

[0041] like Figure 1-6 As shown, a device for measuring humidity deformation of phosphogypsum-based materials is provided. At least two expansion detection rings 2 of semicircular ring structure are provided inside the box body 1. The expansion detection rings 2 are slidably connected to the box body 1. A plurality of first displacement sensors 3 are provided on the inner surface of the expansion detection rings 2. A height detection plate 14 is also provided inside the box body 1. The height detection plate 14 is slidably connected to the box cover 101 of the box body 1. A plurality of second displacement sensors 15 are provided on the height detection plate 14. The plurality of second displacement sensors 15 and the plurality of first displacement sensors 3 are electrically connected to a data acquisition computer 8. The two expansion detection rings 2 are symmetrically arranged, and the two expansion detection rings 2 slide in parallel. The expansion detection rings 2 will not deflect. The second displacement sensors 15 on the height detection plate 14 are respectively as follows: Figure 3 As described above, the first displacement sensor 3 and the second displacement sensor 15 are evenly pressed against the specimen body 11, and both the first displacement sensor 3 and the second displacement sensor 15 adopt LPY2 micro spring self-reset series displacement sensors.

[0042] In the preferred embodiment, the expansion detection ring 2 is slidably connected to the side wall of the box body 1 through the sliding rod 4, a first sliding sleeve 12 is provided on the side wall of the box body 1, and the sliding rod 4 is slidably connected to the first sliding sleeve 12. The sliding rod 4 is a rectangular structure, and the two expansion detection rings 2 are symmetrically arranged, sliding smoothly, and the expansion detection rings 2 will not deflect.

[0043] In a preferred embodiment, a first fixing nut 13 is disposed on the first sliding sleeve 12, and the first fixing nut 13 passes through the first sliding sleeve 12 and abuts against the sliding rod 4. The first fixing nut 13 locks the position of the sliding rod 4.

[0044] In the preferred embodiment, the box body 1 is provided with a second sliding sleeve 17, the height detection plate 14 is slidably connected to the second sliding sleeve 17 through an adjusting rod 18, and the second sliding sleeve 17 is provided with a second fixing nut 16, which passes through the second sliding sleeve 17 and abuts against the adjusting rod 18. The second fixing nut 16 locks the position of the adjusting rod 18, so that the position of the height detection plate 14 is fixed.

[0045] In a preferred embodiment, a digital display 5 is further provided on the box 1, and the digital display 5 is electrically connected to the plurality of first displacement sensors 3 and the plurality of second displacement sensors 15. The digital display 5 displays the displacement distances detected by the plurality of first displacement sensors 3 and the plurality of second displacement sensors 15.

[0046] In the preferred embodiment, a humidity sensor 10 is further provided inside the box body 1 , and the humidity sensor 10 is electrically connected to the digital display meter 5 . The humidity sensor 10 detects the humidity inside the box body 1 .

[0047] In the preferred embodiment, a humidity controller 6 is further provided, and the humidity controller 6 is communicated with the interior of the box body 1. The humidity controller 6 controls the humidity inside the box body 1.

[0048] In a preferred embodiment, a carrying platform 7 is further provided at the bottom of the box body 1 , and a detachable positioning ring 701 is provided on the carrying platform 7 . The specimen body 11 is positioned on the carrying platform 7 by the positioning ring 701 .

[0049] In the preferred embodiment, a fixing ring 702 is provided on the surface of the positioning ring 701, a positioning groove 703 is provided on the bearing platform 7, the fixing ring 702 is arranged in the positioning groove 703, and a guiding inclined surface is also provided on the upper opening of the positioning ring 701. The positioning ring 701 positions the position of the specimen body 11 to ensure that the specimen body 11 is in the middle of the bearing platform 7.

[0050] Example 2

[0051] Further illustrate with reference to Example 1, Figure 1-6 As shown, the measuring method includes: mixing phosphogypsum + graded crushed stone in proportion to form a specimen body 11, making a specimen with a diameter and a height of 150-160 mm, and then moisturizing and curing for 7 days to perform deformation measurement.

[0052] First, the fixing ring 702 of the positioning ring 701 is clamped in the positioning groove 703 . After the positioning ring 701 is positioned, the specimen body 11 is positioned and placed on the bearing platform 7 through the positioning ring 701 .

[0053] The expansion detection ring 2 on one side inside the box 1 is close to the specimen body 11, and the first displacement sensor 3 inside the expansion detection ring 2 is against the surface of the specimen body 11. After all the first displacement sensors 3 generate displacement data, the displacement data generated by all the first displacement sensors 3 are adjusted to zero on the digital display 5, and the operation method of the expansion detection ring 2 on the other side inside the box 1 is the same.

[0054] After the expansion detection rings 2 on both sides inside the box body 1 are against the specimen body 11 , the expansion detection rings 2 on both sides are fixed by using the first fixing nuts 13 .

[0055] The box cover 101 is covered on the box body 1, and the transparent glass on one side of the box body 1 observes the position of the height detection plate 14. The second displacement sensor 15 on the height detection plate 14 is against the upper surface of the specimen body 11. The second displacement sensor 15 generates displacement data which is displayed on the digital display 5. The displacement data generated by all the second displacement sensors 15 on the digital display 5 are adjusted to zero.

[0056] The humidity inside the box body 1 is adjusted by the humidity controller 6, and the humidity sensor 10 detects the humidity inside the box body 1. The humidity inside the box body 1 is 40-50%.

[0057] The data acquisition computer 8 inputs the height H1 and the diameter D1 of the test piece 11, and the multiple first displacement sensors 3 of the expansion detection rings 2 on both sides detect the expansion data of the test piece 11:

[0058] The detection method is: the expansion detection rings 2 on both sides are provided with symmetrical first displacement sensors 3, and the symmetrical first displacement sensors 3 are in the same plane, and the sum of the displacement data detected by the two symmetrical first displacement sensors 3 is:

[0059] L1+L2=L;

[0060] Wherein: L1 is the displacement distance detected by displacement sensor A, L2 is the displacement distance detected by displacement sensor B, and L is the sum of the displacements of displacement sensor A and displacement sensor B.

[0061] The second displacement sensor 15 detects expansion data of the test piece 11 in the height direction, and the second displacement sensor 15 detects that the displacement data is N.

[0062] The diameter D2 of the specimen body 11 after the change is: D2 = L + D1;

[0063] The height of the specimen body 11 after the change is: H2 = N + H1;

[0064] The volume change of the specimen is:

[0065]

[0066] Wherein: D2 is the diameter of the specimen body 11 after the change, H2 is the height of the specimen body 11 after the change;

[0067] The digital display table stores the readings on the data acquisition computer 8 through the data line. The readings are calculated by the volume calculation program for multiple measurements to get the average value and reflected on the digital display table 5.

[0068] Example 3

[0069] Further illustrate with reference to Examples 1-2, Figure 1-6 As shown, a test piece with a diameter and height of 150 mm is made by using a mix ratio of 45% phosphogypsum + graded crushed stone. After moisturizing and curing for 7 days, the test piece is placed on the supporting platform 7 of the box 1. At this time, the box cover is covered and the humidity on the panel of the humidity controller 6 is adjusted to 50%. After the setting is completed, the expansion detection ring 2 approaches the test piece and fixes the position under the action of the sliding rod 4. After the distance sensor probe is squeezed, the indicator 5 displays the height H1 and the diameter D1. The humidifier and dehumidifier start to work synchronously. The humidity sensor 10 monitors the humidity in the box in real time and displays the reading on the crystal board of the humidity controller. When the displayed reading is the same as the set reading, the distance sensor displays the height H2 and the diameter D2 of the test piece after the change. The reading is calculated by the volume calculation program for multiple measurements to take the average value and reflected on the indicator 5. The volume calculation program is as follows:

[0070] Specimen volume change

[0071]

[0072] The indicator stores the readings on the computer 8 via the data line.

[0073] The volume calculation unit results show that the volume expansion is 1.4%, and the corresponding deflection test result of the municipal secondary road is 0.25mm, which meets the medium traffic load level in the Technical Specifications for Highway Pavement Base Construction JTG / T F20-2015.

[0074] Example 3

[0075] A test piece with a diameter and height of 150 mm is made by using a mix ratio of 50% phosphogypsum + graded crushed stone. After moisturizing and curing for 7 days, the test piece is placed on the supporting platform 7 of the box 1. At this time, the box cover is covered and the humidity on the panel of the humidity controller 6 is adjusted to 50%. After the setting is completed, the expansion detection ring 2 approaches the test piece and fixes the position under the action of the sliding rod 4. After the distance sensor probe is squeezed, the indicator 5 displays the height H1 and the diameter D1. The humidifier and dehumidifier start to work synchronously. The humidity sensor 10 monitors the humidity in the box in real time and displays the reading on the crystal board of the humidity controller. When the displayed reading is the same as the set reading, the distance sensor displays the height H2 and the diameter D2 of the test piece after the change. The reading is calculated by the volume calculation program for multiple measurements to take the average value and reflected on the indicator 5. The volume calculation program is as follows:

[0076] Specimen volume change

[0077]

[0078] The indicator stores the readings on the computer 8 via the data line.

[0079] The volume calculation unit results show that the volume expansion is 1.1%, and the corresponding deflection test result of the municipal secondary road is 0.22mm, which meets the heavy traffic load level in the Technical Specifications for Highway Pavement Base Construction JTG / T F20-2015.

[0080] A test piece with a diameter and height of 150 mm is made by using a mix ratio of 55% phosphogypsum + graded crushed stone. After moisturizing and curing for 7 days, the test piece is placed on the supporting platform 7 of the box 1. At this time, the box cover is covered and the humidity on the panel of the humidity controller 6 is adjusted to 50%. After the setting is completed, the expansion detection ring 2 approaches the test piece and fixes the position under the action of the sliding rod 4. After the distance sensor probe is squeezed, the indicator 5 displays the height H1 and the diameter D1. The humidifier and dehumidifier start to work synchronously. The humidity sensor 10 monitors the humidity in the box in real time and displays the reading on the crystal board of the humidity controller. When the displayed reading is the same as the set reading, the distance sensor displays the height H2 and the diameter D2 of the test piece after the change. The reading is calculated by the volume calculation program for multiple measurements to take the average value and reflected on the indicator 5. The volume calculation program is as follows:

[0081] Specimen volume change

[0082]

[0083] The indicator stores the readings on the computer 8 via the data line.

[0084] The volume calculation unit results show that the volume expansion is 1.6%, and the corresponding deflection test result of the rural road is 0.32mm, which does not meet the medium traffic load level in the Technical Specifications for Highway Pavement Base Construction JTG / T F20-2015.

[0085] A test piece with a diameter and height of 150 mm is made by using a mix ratio of 60% phosphogypsum + graded crushed stone. After moisturizing and curing for 7 days, the test piece is placed on the supporting platform 7 of the box 1. At this time, the box cover is covered and the humidity on the panel of the humidity controller 6 is adjusted to 50%. After the setting is completed, the expansion detection ring 2 approaches the test piece and fixes the position under the action of the sliding rod 4. After the distance sensor probe is squeezed, the indicator 5 displays the height H1 and the diameter D1. The humidifier and dehumidifier start to work synchronously. The humidity sensor 10 monitors the humidity in the box in real time and displays the reading on the crystal board of the humidity controller. When the displayed reading is the same as the set reading, the distance sensor displays the height H2 and the diameter D2 of the test piece after the change. The reading is calculated by the volume calculation program for multiple measurements to take the average value and reflected on the indicator 5. The volume calculation program is as follows:

[0086] Specimen volume change

[0087]

[0088] The indicator stores the readings on the computer 8 via the data line.

[0089] The volume calculation unit results show that the volume expansion is 1.6%, and the corresponding deflection test result of the rural road is 0.31mm, which does not meet the medium traffic load level in the Technical Specifications for Highway Pavement Base Construction JTG / T F20-2015.

[0090] The above embodiments are only preferred technical solutions of the present invention and should not be regarded as limiting the present invention. The protection scope of the present invention shall be the technical solutions recorded in the claims, including equivalent replacement solutions of the technical features in the technical solutions recorded in the claims. That is, equivalent replacement improvements within this scope are also within the protection scope of the present invention.

Claims

1. A method for measuring humidity deformation of phosphogypsum-based materials, characterized in that: The measurement methods include: S1. Mix phosphogypsum and graded crushed stone in proportion to form a specimen body (11), make a specimen with a diameter and height of 150-160 mm, and then measure the deformation after moisturizing and curing for 7 days; S2, first clamping the fixing ring (702) of the positioning ring (701) in the positioning groove (703), and after the positioning ring (701) is positioned, the specimen body (11) is positioned and placed on the bearing platform (7) through the positioning ring (701); S3, the expansion detection ring (2) on one side inside the box (1) is close to the specimen body (11), the first displacement sensor (3) inside the expansion detection ring (2) is against the surface of the specimen body (11), and after all the first displacement sensors (3) generate displacement data, the displacement data generated by all the first displacement sensors (3) are adjusted to zero on the digital display (5), and the expansion detection ring (2) on the other side inside the box (1) is operated in the same manner; S4, after the expansion detection rings (2) on both sides of the box body (1) are in contact with the specimen body (11), the expansion detection rings (2) on both sides are fixed using the first fixing nuts (13); S5, the box cover (101) is placed on the box body (1), the transparent glass on one side of the box body (1) observes the position of the height detection plate (14), the second displacement sensor (15) on the height detection plate (14) is placed against the upper surface of the specimen body (11), the displacement data generated by the second displacement sensor (15) is displayed on the digital display (5), and the displacement data generated by all the second displacement sensors (15) on the digital display (5) are adjusted to zero; S6, adjusting the humidity inside the box (1) by means of the humidity controller (6), and detecting the humidity inside the box (1) by means of the humidity sensor (10), wherein the humidity inside the box (1) is 40-50%; S7. The data acquisition computer (8) inputs the height H1 and diameter D1 of the test piece (11), and the multiple first displacement sensors (3) of the expansion detection rings (2) on both sides detect the expansion data of the test piece (11): The detection method is as follows: the expansion detection rings (2) on both sides are provided with symmetrical first displacement sensors (3), and the symmetrical first displacement sensors (3) are located on the same plane, and the sum of the displacement data detected by the two symmetrical first displacement sensors (3) is: L1+L2=L; Where: L1 is the displacement distance detected by displacement sensor A, L2 is the displacement distance detected by displacement sensor B, and L is the sum of the displacements of displacement sensor A and displacement sensor B; The second displacement sensor (15) detects expansion data of the test piece (11) in a height direction, and the second displacement sensor (15) detects that the displacement data is N; S7, the diameter D2 of the specimen body (11) after the change is: D2 = L + D1; The height of the specimen body (11) after the change is: H2=N+ H1; The volume change of the specimen is: ； Wherein: D2 is the diameter of the specimen body (11) after the change, H2 is the height of the specimen body (11) after the change; S8. The digital indicator stores the readings on the data acquisition computer (8) through the data line. The readings are calculated by the volume calculation program for multiple measurements to obtain the average value and reflected on the digital display (5).

2. The measuring method of the phosphogypsum-based material humidity deformation measuring device according to claim 1, characterized in that: At least two expansion detection rings (2) of semicircular ring structure are provided inside the box body (1), the expansion detection rings (2) are slidably connected to the box body (1), a plurality of first displacement sensors (3) are provided on the inner surface of the expansion detection rings (2), a height detection plate (14) is further provided inside the box body (1), the height detection plate (14) is slidably connected to a box cover (101) of the box body (1), a plurality of second displacement sensors (15) are provided on the height detection plate (14), and the plurality of second displacement sensors (15) and the plurality of first displacement sensors (3) are electrically connected to a data acquisition computer (8).

3. The measuring method of the device for measuring humidity deformation of phosphogypsum-based materials according to claim 1, characterized in that: The expansion detection ring (2) is slidably connected to the side wall of the box body (1) via a sliding rod (4); a first sliding sleeve (12) is provided on the side wall of the box body (1); and the sliding rod (4) is slidably connected to the first sliding sleeve (12).

4. The measuring method of the device for measuring humidity deformation of phosphogypsum-based materials according to claim 3 is characterized by: A first fixing nut (13) is provided on the first sliding sleeve (12), and the first fixing nut (13) passes through the first sliding sleeve (12) and abuts against the sliding rod (4).

5. The measuring method of a phosphogypsum-based material humidity deformation measuring device according to claim 1, characterized in that: A second sliding sleeve (17) is provided on the box body (1), the height detection plate (14) is slidably connected to the second sliding sleeve (17) via an adjusting rod (18), a second fixing nut (16) is provided on the second sliding sleeve (17), and the second fixing nut (16) passes through the second sliding sleeve (17) and abuts against the adjusting rod (18).

6. The measuring method of a phosphogypsum-based material humidity deformation measuring device according to claim 1, characterized in that: A digital display (5) is also provided on the box body (1), and the digital display (5) is electrically connected to the plurality of first displacement sensors (3) and the plurality of second displacement sensors (15).

7. The measuring method of the device for measuring humidity deformation of phosphogypsum-based materials according to claim 6, characterized in that: A humidity sensor (10) is also provided inside the box body (1), and the humidity sensor (10) is electrically connected to the digital display meter (5).

8. The measuring method of the device for measuring humidity deformation of phosphogypsum-based materials according to claim 6, characterized in that: A humidity controller (6) is also provided, and the humidity controller (6) is communicated with the interior of the box body (1).

9. The measuring method of a phosphogypsum-based material humidity deformation measuring device according to claim 1, characterized in that: A bearing platform (7) is also provided at the bottom of the box body (1), and a detachable positioning ring (701) is provided on the bearing platform (7), and the specimen body (11) is positioned and placed on the bearing platform (7) by means of the positioning ring (701).

10. The measuring method of the device for measuring humidity deformation of phosphogypsum-based materials according to claim 9, characterized in that: A fixing ring (702) is provided on the surface of the positioning ring (701), a positioning groove (703) is provided on the bearing platform (7), the fixing ring (702) is arranged in the positioning groove (703), and a guiding inclined surface is also provided on the upper opening of the positioning ring (701).

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