A sand filling method density tester

Abstract

The utility model discloses a density tester using a sand filling method, comprising a sand filling cylinder, a sand cover and a calibration cylinder. A sand pouring port is provided at the top of the sand filling cylinder, an isolation plate is provided at the middle and lower part of the sand filling cylinder, a sand outlet hole is provided at the center of the isolation plate, a clamping piece is extended downwardly from the sand outlet hole, a switch assembly for blocking or exposing the sand outlet hole is movably installed on the isolation plate, a first through hole is provided at the upper end of the sand cover, a second through hole is provided at the lower end, a third through hole with the same aperture as the second through hole is provided at the upper end of the calibration cylinder, the sand cover and the calibration cylinder are detachably connected, when in use, the sand cover and the calibration cylinder are fixedly installed in position, the sand filling cylinder is placed on the sand cover so that the sand outlet hole is aligned and clamped with the first through hole of the sand cover, the volume of the test pit can be calculated by subtracting the mass of the standard sand in the sand cover during calculation, the test data is accurate, the sand filling operation is simple, accurate data can be obtained by sand filling once, there is no need to scrape the sand for leveling multiple times, and there is no need to collect excess sand, the overall structure of the equipment is simple, it is easy to carry, and parts are not easy to lose.

Description

Technical Field

[0001] The utility model relates to the technical field of geotechnical test and detection equipment, in particular to a sand filling method density tester. Background Art

[0002] The sand filling method is suitable for in-situ density tests of fine-grained soil, sandy soil and gravel soil. The principle is to use a sand filling instrument to fill the test pit with standard sand of known density, and then obtain the volume of the test pit. Finally, the density of the soil in the original test pit is calculated, and the density is further tested and calculated to obtain the compaction degree. The result is used as an important parameter to evaluate the actual compaction situation of the site, and is widely used in process detection and completion acceptance of various municipal engineering and housing construction projects.

[0003] Existing sand filling instruments usually have many components, are inconvenient to carry, and are prone to losing parts; it is not convenient to scrape the sand surface flat during the sand filling process, and multiple scraping is time-consuming and laborious; the fine sand scraped off is easy to spill and difficult to collect, resulting in inaccurate data and affecting the results. Therefore, when test personnel actually use the sand filling method to detect the compaction quality, it is difficult to accurately grasp the measurement accuracy, and it is easy to produce a large error with the actual quality. Because the experimental results are the main basis for judging the compaction degree of soil in the site, inaccurate results are easy to cause conflicts between the quality inspection department and the construction unit. Based on this, this field is in urgent need of a sand filling method density tester that can not only accurately measure data to ensure the accuracy of the results, but also quickly complete the test and improve the test efficiency. Utility Model Content

[0004] To achieve the above purpose, the utility model is implemented through the following technical solutions: a sand filling method density tester, including a sand filling cylinder, a sand cover and a calibration cylinder, the top of the sand filling cylinder is provided with a sand pouring port, the middle and lower part of the sand filling cylinder is provided with an isolation plate, the center position of the isolation plate is provided with a sand outlet hole, the sand outlet hole extends downward with a clamping piece, the isolation plate is movably mounted with a switch assembly for blocking or exposing the sand outlet hole, the sand cover is an inverted funnel shape, the upper end of the sand cover is provided with a first through hole used for aligning the sand outlet hole, the lower end is provided with a second through hole, the upper end of the calibration cylinder is provided with a third through hole, the aperture size of the third through hole is the same as the second through hole, the sand cover and the calibration cylinder are detachably connected by aligning the second through hole and the third through hole.

[0005] Preferably, the switch assembly includes a circular cover plate, an opening pull rod, a closing pull rod and a connecting rod. The diameter of the circular cover plate is larger than the aperture of the sand outlet hole. The connecting rod is symmetrically fixedly mounted on both sides of the circular cover plate. The opening pull rod and the closing pull rod are respectively fixedly mounted on the outer ends of the two connecting rods on both sides of the circular cover plate. The opening pull rod and the closing pull rod are both passed through the wall of the sand filling cylinder and exposed to the outside.

[0006] Preferably, two handles are provided on the outer wall of the sand filling cylinder in a centrally symmetrical manner.

[0007] Preferably, the inner wall of the sand filling cylinder is provided with a sand filling position scale mark, and the sand filling position scale mark is located above the isolation plate.

[0008] Preferably, the sand cover has several different sizes, the sand covers of different sizes have the same height, the first through holes have the same aperture size, the second through holes of the sand covers of different sizes have different aperture sizes, and the calibration tube has several sizes for use with different sand covers.

[0009] Preferably, the aperture size of the third through hole at the upper end of the calibration tube is matched with the aperture size of the second through hole of the sand cover, and the heights of calibration tubes of different specifications are different.

[0010] Preferably, a first annular mounting portion is provided at the bottom of the sand cover extending outward along the diameter, a first mounting hole is provided on the first annular mounting portion, a second annular mounting portion is provided at the top of the calibration tube extending outward along the diameter, a second mounting hole is provided on the second annular mounting portion, when the sand cover and the calibration tube are installed in alignment, the first annular mounting portion and the second annular mounting portion fit together up and down, and the first mounting hole and the second mounting hole are aligned, and fixing nails are simultaneously passed through the first mounting hole and the second mounting hole to form a fixation.

[0011] Preferably, the sand cover is fixedly installed above the ground by means of fixing nails passing through the first installation hole, and the calibration cylinder is completely fixedly installed below the ground by means of fixing nails passing through the second installation hole.

[0012] The utility model provides a sand filling method density tester, which has the following beneficial effects compared with the prior art:

[0013] The sand filling method density tester, when in use, the sand cover is placed on the calibration cylinder, installed and fixed in position, the sand filling cylinder is placed on the sand cover so that the sand outlet hole at the center of the isolation plate is aligned and snapped with the first through hole of the sand cover; when the switch component is turned on, standard sand is poured into the calibration cylinder and the sand cover below, after the standard sand density and the mass of sand in the sand cover are calibrated, the in-situ density can be tested on the field sample, when the in-situ density is tested, the sand cover is placed on the test pit and fixed in position, the sand filling cylinder is placed on the sand cover, the switch component is turned on to pour sand into the test pit, and the internal space of the sand cover and the calibration cylinder is filled, when the test calculation is performed, the mass of the standard sand in the sand cover can be subtracted to calculate the volume of the test pit, the test data is accurate, and the sand filling operation is simple, accurate data can be obtained by one sand filling, no multiple sand scraping and leveling is required, and no excess sand needs to be collected, the overall structure of the equipment is simple, easy to carry, and parts are not easy to lose. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0015] Figure 2It is an exploded view of the utility model;

[0016] Figure 3 It is a schematic diagram of the assembly plane structure of the utility model.

[0017] Description of reference numerals:

[0018] 1. Sand filling cylinder; 11. Sand pouring port; 12. Isolation plate; 121. Sand outlet hole; 122. Clip-on; 13. Handle; 2. Sand cover; 21. First through hole; 22. Second through hole; 23. First annular mounting portion; 231. First mounting hole; 3. Calibration cylinder; 31. Third through hole; 32. Second annular mounting portion; 321. Second mounting hole; 4. Switch assembly; 41. Circular cover; 42. Opening rod; 43. Closing rod; 44. Connecting rod; 5. Fixing nail; 6. Sand filling position scale mark. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0020] See also Figure 1-3 The utility model provides a density tester using a sand filling method, comprising a sand filling cylinder 1, a sand cover 2 and a calibration cylinder 3. The sand filling cylinder 1 is provided with a sand pouring port 11 at the top, an isolation plate 12 is provided in the middle and lower part of the sand filling cylinder 1, a sand outlet 121 is provided at the center of the isolation plate 12, a clamping piece 122 is extended downward from the sand outlet hole 121, a switch assembly 4 for blocking or exposing the sand outlet hole 121 is movably mounted on the isolation plate 12, the sand cover 2 is in the shape of an inverted funnel, a first through hole 21 is provided at the upper end of the sand cover 2 for aligning the sand outlet hole 121, a second through hole 22 is provided at the lower end, a third through hole 31 is provided at the upper end of the calibration cylinder 3, the apertures of the third through hole 31 and the second through hole 22 are the same, and the sand cover 2 and the calibration cylinder 3 are detachably connected by aligning the second through hole 22 and the third through hole 31.

[0021] The sand filling density tester in the utility model is assembled from three parts, namely, a sand filling cylinder 1, a sand cover 2 and a calibration cylinder 3. When in use, the sand cover 2 is placed on the calibration cylinder 3 and fixed in position, and the sand filling cylinder 1 is placed on the sand cover 2 so that the sand outlet hole 121 at the center of the isolation plate 12 is aligned with the first through hole 21 of the sand cover 2 and is engaged; when the switch assembly 4 is turned on, standard sand is poured into the calibration cylinder 3 and the sand cover 2 below, and after the standard sand density and the sand quality of the sand cover 2 are calibrated, the sample can be tested in situ on site. Density: When testing the in-situ density, place the sand cover 2 on the test pit and fix it in position. Place the sand filling tube 1 on the sand cover 2 and turn on the switch assembly 4 to fill the sand into the test pit until the internal space of the sand cover 2 and the calibration tube 3 is filled. During the test calculation, the volume of the test pit can be calculated by subtracting the mass of the standard sand in the sand cover 2. The test data is accurate and the sand filling operation is simple. Accurate data can be obtained by filling the sand once. There is no need to scrape the sand for leveling multiple times or collect excess sand. The overall structure of the equipment is simple, easy to carry, and it is not easy to lose parts.

[0022] The switch assembly 4 in the embodiment of the utility model comprises a circular cover plate 41, an opening pull rod 42, a closing pull rod 43 and a connecting rod 44. The diameter of the circular cover plate 41 is larger than the aperture of the sand outlet hole 121. The connecting rod 44 is symmetrically fixedly mounted on both sides of the circular cover plate 41. The opening pull rod 42 and the closing pull rod 43 are respectively fixedly mounted on the outer ends of the two connecting rods 44 on both sides of the circular cover plate 41. The opening pull rod 42 and the closing pull rod 43 are both passed through the wall of the sand filling tube 1 and exposed to the outside. When in use, by pulling the opening pull rod 42 exposed on the outside of the sand filling tube 1, the circular cover plate 41 moves from the upper side of the sand outlet hole 121 to the pulling direction, so that the circular cover plate 41 and the sand outlet hole 121 are pulled. 21 are misaligned, so that the sand outlet hole 121 is connected with the sand filling cylinder 1, and the sand in the sand filling cylinder 1 can flow downward through the sand outlet hole 121. After the sand in the sand cover 2 and the calibration cylinder 3 are filled, it can be observed that the sand in the sand filling cylinder 1 no longer flows. At this time, the closing pull rod 43 is pulled, and the circular cover plate 41 moves along the pulling direction and resets to above the sand outlet hole 121, so that the circular cover plate 41 completely covers the sand outlet hole 121 below the sand filling cylinder 1 to prevent the sand in the sand filling cylinder 1 from further leaking out. The sand filling cylinder 1 is then moved away to complete the filling. When closing, the circular cover plate 41 also smoothes the sand at the first through hole 21 above the sand cover 2. One object has multiple uses, which simplifies the test operation and improves the test efficiency.

[0023] In order to further improve the convenience of carrying the sand filling tube 1, in the embodiment of the utility model, two handles 13 are centrally symmetrically provided on the outer wall of the sand filling tube 1. Specifically, the two handles 13 are fixed on the outer wall of the sand filling tube 1, and their installation positions are carefully designed and considered to ensure that a balanced and stable force application point can be provided during the carrying process. This centrally symmetrical installation layout not only makes the handles 13 present a regular and coordinated aesthetic in appearance, but more importantly, it can effectively ensure that when carrying the sand filling tube 1, the force can be evenly distributed on the two handles 13, avoiding the tilt or instability caused by uneven force. Through this ingenious design and precise installation, the convenience and reliability of carrying the sand filling tube 1 are greatly enhanced, bringing substantial convenience and advantages to related operations.

[0024] The inner wall of the sand filling tube 1 in the embodiment of the utility model is provided with a sand filling position scale mark 6, and the sand filling position scale mark 6 is located above the isolation plate 12. When performing sand filling related operations, the operator can directly observe the sand filling position scale mark 6 to clearly and accurately know the volume of the sand, thereby constructing an accurate reference standard for the sand filling process.

[0025] The sand cover 2 in the embodiment of the utility model is provided with several different sizes and specifications. The heights of the sand covers 2 of different specifications are the same, the apertures of the first through holes 21 are the same, and the apertures of the second through holes 22 of the sand covers 2 of different specifications are different. Therefore, the sand covers 2 of different specifications can be adapted to be installed below the isolation plate 12 in the sand filling cylinder 1, and the first through hole 21 can always be aligned and connected to the sand outlet hole 121 for use. The calibration cylinder 3 is provided with several sizes and specifications for use with different sand covers 2.

[0026] Furthermore, the aperture size of the third through hole 31 at the upper end of the calibration tube 3 is matched with the aperture size of the second through hole 22 of the sand cover 2, and the heights of calibration tubes 3 of different specifications are different.

[0027] During the test, the test pit size is first determined according to the maximum particle size of the soil, and a sand cover 2 of the corresponding size is selected for the test. The diameter and depth of the test pit are selected according to the requirements of 41 in-situ density test in the "Standard for Geotechnical Test Methods" GB / T50123-2016 as shown in Table 1:

[0028] Table 1 Test pit dimensions and corresponding maximum particle size (mm)

[0029]

[0030] The specifications of the corresponding calibration tube 3 are selected according to the size of the test pit, and the specifications of the corresponding sand cover 2 are selected according to the diameter of the test pit.

[0031] In order to realize the detachable installation of the sand cover 2 and the calibration cylinder 3, a first annular mounting portion 23 is provided at the bottom of the sand cover 2 in the embodiment of the utility model, extending outward along the diameter, and a first mounting hole 231 is provided on the first annular mounting portion 23; a second annular mounting portion 32 is provided at the top of the calibration cylinder 3, extending outward along the diameter, and a second mounting hole 321 is provided on the second annular mounting portion 32; when the sand cover 2 and the calibration cylinder 3 are installed in alignment, the first annular mounting portion 23 and the second annular mounting portion 32 are fitted together up and down, and the first mounting hole 231 and the second mounting hole 321 are aligned, and fixing nails 5 are simultaneously passed through the first mounting hole 231 and the second mounting hole 321 to form a fixation.

[0032] When in use, the sand cover 2 is fixedly installed above the ground by the fixing nail 5 passing through the first installation hole 231, and the calibration tube 3 is completely fixedly installed below the ground by the fixing nail 5 passing through the second installation hole 321.

[0033] Meanwhile, the contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0034] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes 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 apparatus.

[0035] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A sand filling density tester, characterized in that: The sand filling tube (1) comprises a sand filling tube (1), a sand cover (2) and a calibration tube (3); the sand filling tube (1) is provided with a sand pouring port (11) at the top; an isolation plate (12) is provided at the middle and lower part of the sand filling tube (1); a sand outlet hole (121) is provided at the center of the isolation plate (12); a clamping member (122) extends downward from the sand outlet hole (121); a switch assembly (4) for blocking or exposing the sand outlet hole (121) is movably mounted on the isolation plate (12) The sand cover (2) is in the shape of an inverted funnel. The upper end of the sand cover (2) is provided with a first through hole (21) for use in aligning the sand outlet hole (121), and the lower end is provided with a second through hole (22). The upper end of the calibration tube (3) is provided with a third through hole (31). The apertures of the third through hole (31) and the second through hole (22) are the same. The sand cover (2) and the calibration tube (3) are detachably connected in alignment through the second through hole (22) and the third through hole (31).

2. A sand filling density tester according to claim 1, characterized in that: The switch assembly (4) comprises a circular cover plate (41), an opening pull rod (42), a closing pull rod (43) and a connecting rod (44); the diameter of the circular cover plate (41) is larger than the diameter of the sand outlet hole (121); the connecting rod (44) is symmetrically fixedly mounted on both sides of the circular cover plate (41); the opening pull rod (42) and the closing pull rod (43) are respectively fixedly mounted on the outer ends of the two connecting rods (44) on both sides of the circular cover plate (41); and the opening pull rod (42) and the closing pull rod (43) are both passed through the wall of the sand filling cylinder (1) and exposed to the outside.

3. A sand filling density tester according to claim 1, characterized in that: Two handles (13) are centrally symmetrically arranged on the outer wall of the sand filling cylinder (1).

4. A sand filling density tester according to claim 3, characterized in that: The inner wall of the sand filling cylinder (1) is provided with a sand filling position scale mark (6), and the sand filling position scale mark (6) is located above the isolation plate (12).

5. The sand filling density tester according to claim 1, characterized in that: The sand cover (2) has a plurality of different sizes and specifications. The sand covers (2) of different specifications have the same height, the first through holes (21) have the same aperture size, and the second through holes (22) of the sand covers (2) of different specifications have different aperture sizes. The calibration cylinder (3) has a plurality of sizes and specifications for use with the different sand covers (2).

6. A sand filling density tester according to claim 5, characterized in that: The aperture size of the third through hole (31) at the upper end of the calibration tube (3) is matched with the aperture size of the second through hole (22) of the sand cover (2) for use, and calibration tubes (3) of different specifications have different heights.

7. A sand filling density tester according to claim 6, characterized in that: The sand cover (2) is provided with a first annular mounting portion (23) extending outward along the diameter at the bottom, and a first mounting hole (231) is provided on the first annular mounting portion (23). The calibration tube (3) is provided with a second annular mounting portion (32) extending outward along the diameter at the top, and a second mounting hole (321) is provided on the second annular mounting portion (32). When the sand cover (2) and the calibration tube (3) are mounted in alignment, the first annular mounting portion (23) and the second annular mounting portion (32) are abutted against each other up and down, and the first mounting hole (231) and the second mounting hole (321) are aligned, and fixing nails (5) are simultaneously passed through the first mounting hole (231) and the second mounting hole (321) to form a fixation.

8. A sand filling density tester according to claim 7, characterized in that: The sand cover (2) is fixedly installed above the ground by means of a fixing nail (5) passing through a first installation hole (231), and the calibration cylinder (3) is completely fixedly installed below the ground by means of a fixing nail (5) passing through a second installation hole (321).

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