Device for detecting water content of sand by adopting double-coordinate-axis structure

Abstract

The utility model relates to the technical field of sand moisture content detection, and discloses a device for detecting sand moisture content by adopting a double-coordinate-axis structure, which comprises a base and a support connected with the base, a transverse shaft stepping sliding table is connected onto the support, a longitudinal shaft stepping sliding table is connected onto the transverse shaft stepping sliding table, and a vertical shaft stepping sliding table is connected onto the longitudinal shaft stepping sliding table. The longitudinal axis stepping sliding table is connected with a moisture content sensor and is driven by a driving assembly, and the driving assembly is a stepping motor capable of presetting stalling torque. According to the utility model, through the arrangement of the transverse shaft stepping sliding table and the longitudinal shaft stepping sliding table, the moisture content sensor can automatically move in the transverse and longitudinal directions through mechanical control, so that the moisture content sensor can continuously move among a plurality of sand samples and automatically detect the moisture content; by presetting the stalling torque for the stepping motor, the compaction degree of the same water content sensor on different sand materials can be measured, and then the error of water content detection between different sand samples is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of sand moisture content detection, in particular to a device for detecting sand moisture content by adopting a double coordinate axis structure. Background Art

[0002] The statements in this section merely provide background information related to the present disclosure and may not constitute prior art.

[0003] Sand is the main raw material for concrete production, accounting for about 30% of the mass of each cubic meter of concrete. The measurement and acceptance of sand entering the factory is currently mainly carried out by weighing, and the main factor that determines the actual weight of sand is the water content of sand. Some unscrupulous suppliers increase the weight of sand by injecting water into the sand to gain profits. Therefore, accurate measurement of the water content of sand entering the factory is the focus of cost control for concrete production companies. Previously, the dry-frying method was mainly used to measure the water content of sand in the ready-mixed concrete industry, but this method cannot achieve rapid and automatic detection of sand entering the factory.

[0004] In recent years, some companies have introduced sensors to detect the moisture content of sand. For example, the prior art provides an automatic detection system for the moisture content of sand and gravel, which detects the moisture content of sand by setting a sensor that can move up and down in the shell. The device detects the moisture content of different points in the sand by moving the sand storage device in the horizontal direction. However, in practical applications, due to the different moisture contents and forms of different sand materials, it is difficult to maintain consistency. There are errors in the moisture content detection of different sand materials, and there are large human influence factors; and the device can only detect one sample at a time when in use. After the detection is completed, the sand storage device needs to be taken out again and a new sample needs to be prepared. The detection efficiency is low, and it is difficult to maintain the consistency of the previous and next samples. The detection accuracy of the prior art does not meet the requirements, which limits the application and promotion of sensors in the detection of sand moisture content. Therefore, it is necessary to improve the existing detection method to solve the above problems. Utility Model Content

[0005] The purpose of the utility model is to address the problems of low detection accuracy and low detection efficiency of current detection methods, and to provide a device for detecting the moisture content of sand using a dual-coordinate axis structure, which can realize automatic detection of the moisture content of sand, improve detection accuracy and detection efficiency, and promote the application of sensors in sand moisture content detection.

[0006] The technical solution of the utility model is as follows:

[0007] A device for detecting the moisture content of sand using a dual-coordinate axis structure comprises a base and a bracket connected to the base, the bracket is connected to a horizontal axis stepping slide, the horizontal axis stepping slide is connected to a vertical axis stepping slide, the vertical axis stepping slide is connected to a moisture content sensor, and the vertical axis stepping slide is driven by a driving component.

[0008] The driving component is a stepping motor with a preset stall torque.

[0009] According to a preferred embodiment, the transverse stepping slide is connected to the longitudinal stepping slide via a right-angle bracket, so that the transverse stepping slide and the longitudinal stepping slide do not interfere with each other.

[0010] According to a preferred embodiment, the moisture content sensor is connected to the other side of the longitudinal axis stepping slide relative to the right-angle bracket.

[0011] According to a preferred embodiment, the bracket is arranged on one side of the base, and the longitudinal stepping slide is connected to a side of the transverse stepping slide close to the center of the base.

[0012] According to a preferred embodiment, a sampling box is provided on the base, and the sampling box is detachably connected to the base. The sampling box includes a first accommodating chamber and a second accommodating chamber with the same volume, and the first accommodating chamber and the second accommodating chamber are isolated from each other, so as to ensure that the water in the sample contained therein does not circulate. Preferably, the sampling box also includes a third accommodating chamber with the same liquid volume as the first accommodating chamber and the second accommodating chamber. The provision of multiple accommodating chambers can hold multiple sand samples at a time, which is convenient for comparing the volume of the sand contained and observing the detection status, and the human eye assists in observation, monitoring whether the machine is working properly, quickly discovering problems, and avoiding erroneous detection data; multiple sand samples can be repeated experimental groups taken from the same sampling point, which is convenient for quickly completing repeated experiments; they can also be multiple samples taken from different sampling points, which is convenient for quickly detecting and comparing different samples. Based on the setting of the horizontal axis stepping slide and the vertical axis stepping slide, the moisture content sensor can automatically move and switch between the first accommodating chamber, the second accommodating chamber and the third accommodating chamber, so that three sand samples can be automatically detected at one time.

[0013] The detection node of the moisture content sensor is determined according to the stop time of the stepper motor. When the torque value received by the stepper motor driving the moisture content sensor to contact the sand material downward reaches the preset stop torque value, the stepper motor stops rotating and the moisture content sensor starts working to detect the moisture content of the sand material at this time. With this setting, when detecting different sand materials, the compaction degree of the sand material driven by the stepper motor moisture content sensor is almost the same, thereby ensuring that the detected moisture content values ​​of different sand materials are relatively accurate, avoiding errors caused by human factors.

[0014] By controlling the volume of sand and the degree of compaction of sand during moisture content testing, the error caused by testing different sand materials is overcome, ensuring the accuracy of moisture content testing; multiple sample data can be obtained from a single load of sand, improving testing efficiency.

[0015] According to a preferred embodiment, a positioning assembly is provided on the base for accurately positioning the sampling box.

[0016] Preferably, the positioning assembly comprises at least three positioning protrusions or positioning screws;

[0017] Among them, one positioning protrusion or positioning screw is used to abut against the first side wall of the sampling box, and the remaining two positioning protrusions or positioning screws are used to abut against the second side wall of the sampling box at the same time, and the first side wall and the second side wall are two adjacent side walls. When in use, the operator can quickly put the sampling box into place by quickly abutting the two side walls of the sampling box against the three positioning protrusions or positioning screws, which is convenient and quick.

[0018] According to a preferred embodiment, the positioning assembly includes a positioning protrusion and a positioning auxiliary member, the positioning protrusion includes a first positioning protrusion and a second positioning protrusion, and the bottom of the sampling box is provided with a first positioning hole and a second positioning hole corresponding to the first positioning protrusion and the second positioning protrusion.

[0019] The spacing Y between the positioning auxiliary piece and the first positioning protrusion in the first direction is equal to the distance between the first positioning hole on the bottom of the sampling box and the first side edge of the sampling box; the first direction is the long axis direction of the sampling box. When in use, the side edge of the sampling box is pressed against the positioning auxiliary piece, and the pressing is kept inward, so that the positioning protrusion and the positioning hole can be quickly aligned, and the sampling box can be quickly installed.

[0020] According to a preferred embodiment, the position of the sampling box is set as follows: the long axis of the sampling box is parallel to the long axis of the transverse axis stepping slide, and when the longitudinal axis stepping slide moves along the transverse axis stepping slide, the moisture content sensor can be located at the center of the first accommodating cavity and the second accommodating cavity.

[0021] According to a preferred embodiment, a handle is also provided on the base for users to carry the device for detecting the moisture content of sand with a dual coordinate axis structure.

[0022] According to a preferred embodiment, the bottom of the base further includes legs, and rubber pads are provided at the bottom of the legs. The rubber pads can assist in positioning the device to prevent the device from moving during use, and can also isolate movement vibrations of the device.

[0023] Compared with the existing technology, the beneficial effects of the utility model are:

[0024] 1. A device for detecting the moisture content of sand using a dual-axis structure, based on the coordinated setting of the horizontal and vertical axis stepping slides, can drive the moisture content detection sensor to change its position in the horizontal and vertical directions along the horizontal and vertical axis stepping slides, so that the moisture content detection sensor can adjust its position between different sand samples under mechanical automatic control or human control, and thus can automatically and continuously detect multiple sand samples, thereby improving the detection efficiency;

[0025] Moreover, the setting of the motor capable of presetting the stall torque can unify the compaction degree of the sand material when testing different sand samples, thereby reducing the error in testing different sand samples and improving the detection accuracy;

[0026] 2. A device for detecting the moisture content of sand using a dual-axis structure. The setting of multiple equal-volume cavities in the sampling box can help ensure the same detection volume of multiple sand samples, which is convenient for visual comparison and thus reduces the error of manual operation. It can also be set to multiple repeated samples to obtain comprehensive detection data, further reducing the detection error;

[0027] In addition, the open setting makes it easier to monitor the working status of the sensor, timely discover and eliminate errors or improper monitoring data, and improve the accuracy of sand sample moisture content detection;

[0028] 3. A device for detecting the moisture content of sand using a dual-axis structure. The positioning component can ensure that the position of the sand on the base is consistent when the sand is loaded multiple times, thereby maintaining the detection position of the sand and the sensor consistent, thereby reducing the error caused by the different contact positions between the sensor and the sand; the sampling box is fixed to avoid the movement of the sampling box during detection, thereby improving the detection accuracy;

[0029] At the same time, it can assist in the quick installation and fixation of the sampling box and shorten the material change time. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the overall structure of a device for detecting the moisture content of sand using a double coordinate axis structure;

[0031] Figure 2 It is a schematic diagram of the overall structure of a device for detecting the moisture content of sand using a double coordinate axis structure;

[0032] Figure 3 It is a schematic diagram of the detection process of a device for detecting the moisture content of sand using a dual coordinate axis structure.

[0033] Figure markings: 1-bracket, 2-horizontal axis stepping slide, 3-right angle bracket, 4-longitudinal axis stepping slide, 401-drive assembly, 5-mounting support plate, 6-sensor bracket, 7-water content sensor, 8-handle, 901-first positioning protrusion, 902-second positioning protrusion, 10-leg, 11-sampling box, 1101-first accommodating chamber, 1102-second accommodating chamber, 1103-third accommodating chamber, 12-sand sample, 13-base, 14-positioning auxiliary part. DETAILED DESCRIPTION

[0034] It should be noted that relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0035] The features and performance of the present invention are further described in detail below in conjunction with the embodiments.

[0036] Example 1

[0037] See also Figure 1-3 .

[0038] A device for detecting the moisture content of sand using a dual-axis structure, comprising a base 13 and a bracket 1 connected to the base 13, the bracket 1 being connected to a transverse stepping slide 2, the transverse stepping slide 2 being connected to a longitudinal stepping slide 4, the longitudinal stepping slide 4 being connected to a moisture content sensor 7, the longitudinal stepping slide 4 being driven by a driving assembly 401, the driving assembly 401 being a stepping motor with a preset stall torque. The moisture content sensor 7 is connected to the longitudinal stepping slide 4 via a sensor bracket 61 and a mounting support plate 5. The transverse stepping slide 2 is, for example, SZG1610-250. The longitudinal stepping slide 4 is, for example, SZG1610-150. The moisture content sensor 7 is, for example, a Φ76 (microwave) moisture sensor. The bracket 1 and the base 13 can be welded from profiles.

[0039] According to a preferred embodiment, the transverse stepping slide 2 is connected to the longitudinal stepping slide 4 via a right angle bracket 3, and the right angle bracket 3 can be welded by profiles. The transverse stepping slide 2 and the longitudinal stepping slide 4 do not interfere with each other. The transverse stepping slide 2 can be driven by a driving structure such as a motor, for example, a 57BYGH76 motor.

[0040] According to a preferred embodiment, the moisture content sensor 7 is connected to the other side of the longitudinal axis stepping slide 4 relative to the right-angle bracket 3 .

[0041] According to a preferred embodiment, the bracket 1 is disposed on one side of the base 13 , and the longitudinal stepping slide 4 is connected to one side of the transverse stepping slide 2 close to the center of the base 13 .

[0042] According to a preferred embodiment, a sampling box 11 is provided on the base 13, and the sampling box 11 is detachably connected to the base 13. The sampling box 11 includes a first accommodating chamber 1101 and a second accommodating chamber 1102 with the same volume, and the first accommodating chamber 1101 and the second accommodating chamber 1102 are isolated from each other so that the water contained in the sand loaded in each accommodating chamber does not circulate with each other. The sampling box 11 can be made of a lightweight and impermeable material such as plastic, preferably hard plastic. Preferably, the sampling box 11 also includes a third accommodating chamber 1103 with the same liquid volume as the first accommodating chamber 1101 and the second accommodating chamber 1102. Providing multiple accommodating chambers can hold multiple sand samples at a time, which is convenient for comparing the volume of the sand contained and observing the detection status, and the human eye assists in observation, monitors whether the machine is working normally, quickly discovers problems, and avoids erroneous detection data. Based on the arrangement of the horizontal stepping slide 2 and the vertical stepping slide 4, the moisture content sensor 7 can automatically move and switch between the first accommodation chamber 1101, the second accommodation chamber 1102 and the third accommodation chamber 1103, so that three sand material samples can be automatically tested at one time. Preferably, the partitions between the different accommodation chambers of the sampling box 11 are flush with the upper end of the sampling box 11, so that the sand material can be quickly quantified by scraping.

[0043] The detection node of the moisture content sensor 7 is determined according to the stop time of the stepper motor. When the torque value received by the stepper motor driving the moisture content sensor 7 to contact the sand material downward reaches the preset stop torque value, the stepper motor stops rotating, and the moisture content sensor 7 starts to work to detect the moisture content of the sand material at this time. When detecting different sand materials, the stepper motor drives the moisture content sensor 7 to compact the sand materials to almost the same degree, thereby ensuring that the values ​​of the moisture content of different sand materials detected are relatively accurate, avoiding errors caused by human factors.

[0044] Preferably, the position of the moisture content sensor 7 on the horizontal axis stepping slide 2 and the control of the data detection node of the moisture content sensor 7 can be controlled manually or automatically controlled and the data can be read by an external control program.

[0045] By controlling the volume of sand and the degree of compaction of sand when testing the moisture content, the error caused by testing different sand materials is overcome and the accuracy of moisture content testing is ensured; multiple sand materials can be tested in a single load, which improves the testing efficiency.

[0046] According to a preferred embodiment, the base 13 and the bottom of the sampling box 11 are provided with positioning components for accurately positioning the sampling box 11 .

[0047] Preferably, the positioning component is, for example, a positioning bolt or a positioning protrusion, etc. The positioning protrusion or positioning bolt is provided in at least three numbers, at least one of which is used to abut against the first side of the sampling box 11, and the other two are used to abut against the second side of the sampling box 11 at the same time, and the first side and the second side are two adjacent sides.

[0048] According to a preferred embodiment, the base 13 is provided with a positioning protrusion and a positioning auxiliary member 14, the positioning protrusion includes a first positioning protrusion 901 and a second positioning protrusion 902, and the bottom of the sampling box 11 is provided with a first positioning hole and a second positioning hole corresponding to the first positioning protrusion 901 and the second positioning protrusion 902. The spacing Y between the positioning auxiliary member 14 and the first positioning protrusion 901 in the first direction is equal to the distance between the first positioning hole on the bottom of the sampling box 11 and the edge of the first side 1104 of the sampling box 11; the first direction is the long axis direction of the sampling box 11. When in use, the side edge of the sampling box 11 is pressed against the positioning auxiliary member 14, and the pressing is kept inward, so that the positioning protrusion and the positioning hole can be quickly aligned, and the sampling box 11 can be quickly installed.

[0049] According to a preferred embodiment, the position of the sampling box 11 is set as follows: the long axis of the sampling box 11 is parallel to the long axis of the transverse axis stepping slide 2, and when the longitudinal axis stepping slide 4 moves along the transverse axis stepping slide 2, the moisture content sensor 7 can be located at the center of the first accommodating cavity 1101 and the second accommodating cavity 1102.

[0050] According to a preferred embodiment, a handle 8 is further provided on the base 13 for users to carry the device for detecting the moisture content of sand with a dual coordinate axis structure.

[0051] According to a preferred embodiment, the bottom of the base 13 further includes a leg 10, and a rubber pad is provided at the bottom of the leg 10. The rubber pad can assist in positioning the device to prevent the device from moving during use, and can also isolate the movement vibration of the device.

[0052] Example 2

[0053] like Figure 2-3 As shown, this embodiment provides the use detection steps of a device for automatically detecting the moisture content of sand using a dual coordinate axis structure according to embodiment 1:

[0054] Sampling: When sampling from a stockpile or transport vehicle, the sampling sites should be evenly distributed. Before sampling, the surface of the sampling site should be shoveled away, and then samples should be dug from a certain depth in each site to fill the sampling box 11 with the samples in a natural accumulation state. After filling, scrape off the excess samples on the top of the sampling box 11.

[0055] Test: Place the sampling box 11 filled with samples on the table top of the base 13, and position the sampling box 11 through the positioning component; wipe the detection surface of the moisture content sensor 7 clean; start the device, and the horizontal axis stepping slide 2 and the vertical axis stepping slide 4 carry the moisture content sensor 7 to detect the moisture content of the samples in the sampling box 11, wherein the horizontal axis stepping slide 2 is responsible for the detection position switching, and the vertical axis stepping slide 4 is responsible for the longitudinal movement and detection pressure; after the moisture content of the samples at each detection position of the sampling box 11 is detected, the arithmetic mean of the group of detection values ​​can be automatically calculated through the external system setting as the moisture content value of the group of samples, and it is accurate to 0.1%; after the test, pour out the samples in the sampling box 11 to complete the automatic detection of the sand moisture content.

[0056] Control: Preset the stepper motor stall torque; the lateral movement speed of the horizontal axis stepper slide 2, the longitudinal movement and pressure speed of the vertical axis stepper slide 4 can be adjusted automatically by adjusting the stepper motor parameters as needed to ensure the smooth and uniform operation of the equipment. For example, if the rated torque of the stepper motor is 1.2Nm, it can be preset to 80% of the rated torque, that is, 0.96Nm.

[0057] The above-mentioned embodiments only express the specific implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the protection scope of the present application. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the technical solution concept of the present application, and these all belong to the protection scope of the present application.

Claims

1. A device for detecting the moisture content of sand using a dual-coordinate axis structure, characterized in that: The invention comprises a base (13) and a bracket (1) connected to the base (13); the bracket (1) is connected to a transverse stepping slide (2); the transverse stepping slide (2) is connected to a longitudinal stepping slide (4); the longitudinal stepping slide (4) is connected to a moisture content sensor (7); the longitudinal stepping slide (4) is driven by a driving component (401); the driving component (401) is a stepping motor with a preset stall torque.

2. The device for detecting the moisture content of sand using a dual coordinate axis structure according to claim 1, characterized in that: The transverse axis stepping slide (2) and the longitudinal axis stepping slide (4) are connected via a right-angle bracket (3), and the moisture content sensor (7) is connected to the other side of the longitudinal axis stepping slide (4) relative to the right-angle bracket (3).

3. The device for detecting the moisture content of sand using a dual coordinate axis structure according to claim 1, characterized in that: The bracket (1) is arranged on one side of the base (13), and the longitudinal stepping slide (4) is connected to a side of the transverse stepping slide (2) close to the center of the base (13).

4. The device for detecting the moisture content of sand using a dual coordinate axis structure according to claim 1, characterized in that: A sampling box (11) is arranged on the base (13), and the sampling box (11) is detachably connected to the base (13). The sampling box (11) comprises a first accommodating chamber (1101) and a second accommodating chamber (1102) of the same volume. The first accommodating chamber (1101) and the second accommodating chamber (1102) are isolated from each other and moisture does not flow.

5. The device for detecting the moisture content of sand using a dual coordinate axis structure according to claim 4, characterized in that: The base (13) is provided with a positioning component for positioning the sampling box (11).

6. The device for detecting the moisture content of sand using a dual coordinate axis structure according to claim 5, characterized in that: The positioning assembly includes at least three positioning protrusions or positioning screws; One positioning protrusion or positioning screw is used to abut against the first side wall of the sampling box (11), and the remaining two positioning protrusions or positioning screws are used to abut against the second side wall of the sampling box (11) at the same time, and the first side wall and the second side wall are two adjacent side walls.

7. The device for detecting the moisture content of sand using a dual coordinate axis structure according to claim 5, characterized in that: The positioning assembly comprises a positioning protrusion and a positioning auxiliary member (14), wherein the positioning protrusion comprises a first positioning protrusion (901) and a second positioning protrusion (902), The bottom of the sampling box (11) is provided with a first positioning hole and a second positioning hole corresponding to the first positioning protrusion (901) and the second positioning protrusion (902). The spacing Y between the positioning auxiliary member (14) and the first positioning protrusion (901) in the first direction is equal to the distance between the first positioning hole on the bottom of the sampling box (11) and the edge of the first side surface (1104) of the sampling box (11); The first direction is the long axis direction of the sampling box (11).

8. The device for detecting the moisture content of sand using a dual coordinate axis structure according to claim 7, characterized in that: The position of the sampling box (11) is set so that the long axis of the sampling box (11) is parallel to the long axis of the transverse stepping slide (2), and when the longitudinal stepping slide (4) moves along the transverse stepping slide (2), the moisture content sensor (7) can be located at the center of the first accommodating cavity (1101) and the second accommodating cavity (1102).

9. The device for detecting the moisture content of sand using a dual coordinate axis structure according to claim 1, characterized in that: Handles (8) are respectively provided on opposite sides of the base (13).

10. The device for detecting the moisture content of sand using a dual coordinate axis structure according to claim 1, characterized in that: The bottom of the base (13) is also provided with a supporting leg (10), and the supporting leg (10) is provided with a rubber pad for buffering and positioning.

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