Aggregate close packing density testing device

Abstract

The utility model relates to the technical field of concrete preparation, and provides an aggregate close packing density testing device which comprises a bottom plate, a rotating shaft, a bearing ring and a capacity cylinder, the rotating shaft is rotatably suspended on the bottom plate; a first distance exists between the bearing ring and the bottom plate, the bearing ring is fixedly connected with the rotating shaft, and the bearing ring is symmetrical about the rotating shaft; the containing cylinder can be inserted into the bearing ring. According to the aggregate close packing density testing device disclosed by the utility model, the rotating shaft is suspended on the bottom plate, and the supporting ring is fixedly arranged on the rotating shaft to support the capacity cylinder, so that the initial height and the position of the capacity cylinder are fixed, and the supporting ring is symmetrical about the rotating shaft; the jolting angle and the jolting force can be basically kept consistent, so that the compactness of the aggregate, on the two sides of the rotating shaft, of the capacity cylinder is basically kept consistent after jolting.

Description

Technical Field

[0001] The utility model relates to the technical field of concrete preparation, in particular to a device for testing the compact packing density of aggregates. Background Art

[0002] Aggregate is the largest raw material in concrete, and its performance directly affects the effect of concrete. The compact packing density of coarse aggregate is an important indicator to determine whether coarse aggregate can be used in concrete.

[0003] In the related art, when testing the compact density of aggregate, it is usually necessary to load the aggregate sample into the capacity cylinder three times. After loading once, a round steel needs to be placed at the bottom of the cylinder, and then the cylinder is pressed and shaken left and right on the ground to make the aggregate stack more compact. In actual operation, the round steel is easy to slip, resulting in different compactness of the aggregate on both sides, which causes deviation in the density test results. Utility Model Content

[0004] The utility model provides an aggregate compact density testing device, which is used to solve the problem in the prior art that round steel is easy to slip when bumped, resulting in different compactness of aggregates on both sides and deviation in density testing results.

[0005] The utility model provides an aggregate compact packing density testing device, comprising:

[0006] Bottom plate,

[0007] A rotating shaft, the rotating shaft is rotatably suspended on the bottom plate;

[0008] A supporting ring has a first spacing with the bottom plate, the supporting ring is fixedly connected to the rotating shaft, and the supporting ring is symmetrical about the rotating shaft;

[0009] A capacity cylinder, which can be inserted into the supporting ring.

[0010] According to the aggregate compact packing density testing device of the utility model, the cross-sectional area of ​​the support ring gradually decreases from the upper opening to the lower opening.

[0011] According to the aggregate compact packing density testing device of the utility model, the support ring is in the shape of a truncated cone.

[0012] According to the aggregate compact packing density testing device of the utility model, the sum of the distance between the rotating shaft and the bottom plate and the diameter of the rotating shaft is 16 mm.

[0013] According to the aggregate compact packing density testing device of the utility model, two bases are fixedly installed on the bottom plate, both of the two bases are located outside the supporting ring, and both ends of the rotating shaft can be rotatably installed on the corresponding bases.

[0014] According to the aggregate compact packing density testing device of the utility model, both ends of the rotating shaft are connected to the corresponding base through a bearing respectively.

[0015] According to the aggregate compact packing density testing device of the utility model, it also includes at least two limit members, the two limit members are sleeved on the rotating shaft, and the end faces of the two limit members are respectively abutted against the end faces of the two bases that are away from each other.

[0016] According to the aggregate compact packing density testing device of the utility model, a threaded hole is provided on the limiting member; a thread matching the threaded hole is provided on the rotating shaft at a position corresponding to the limiting member, and the rotating shaft passes through the threaded hole and is threadedly connected to the limiting member.

[0017] According to the aggregate compact packing density testing device of the utility model, the limiting member includes a first limiting member and a second limiting member;

[0018] The threaded holes of the first limiting member and the second limiting member have opposite rotation directions, the opposite end faces of the first limiting member and the second limiting member abut against each other, and the other end face of the first limiting member or the second limiting member abuts against the base.

[0019] According to the aggregate compact packing density testing device of the utility model, a first clamping portion is provided on the supporting ring, and a second clamping portion adapted to the first clamping portion is provided on the capacity cylinder, and the first clamping portion and the second clamping portion are clamped with each other.

[0020] The aggregate compact density testing device of the utility model suspends a rotating shaft on a base plate, and a supporting ring is fixedly arranged on the rotating shaft to support a capacity cylinder, so that the initial height and position of the capacity cylinder are fixed, and the capacity cylinder can rotate to both sides with the rotating shaft to hit the base plate, so that the aggregate sample in the capacity cylinder is impacted and becomes more compact and uniform; at the same time, the supporting ring is symmetrical about the rotating shaft, and when the capacity cylinder in the supporting ring is impacted to both sides of the rotating shaft respectively, the impact angle and force can be basically kept consistent, so that the density of the aggregates on both sides of the capacity cylinder after the impact is basically kept consistent, effectively solving the problem in the prior art that round steel is easy to slip, resulting in different density of aggregates on both sides, and causing deviation in density detection results. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the present invention or the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0022] Figure 1 It is a schematic diagram of an aggregate compact packing density testing device provided by an embodiment of the utility model;

[0023] Figure 2 It is a schematic diagram of an aggregate compact packing density testing device (excluding a capacity cylinder) provided in an embodiment of the utility model.

[0024] Reference numerals:

[0025] 1. Aggregate compact packing density test device;

[0026] 11. Bottom plate; 12. Rotation axis; 13. Support ring; 14. Capacity cylinder; 15. Base;

[0027] 16. Limiting member; 161. First limiting member; 162. Second limiting member. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be described clearly and completely in conjunction with the drawings in the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] In the description of the embodiments of the present utility model, it should be noted that the terms "upper", "lower", "front", "back", "inner", "outer", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the embodiments of the present utility model. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0030] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] Combine the following Figure 1-2The utility model describes an aggregate compact packing density testing device.

[0032] like Figure 1 As shown, the utility model provides an aggregate compact density testing device 1, comprising: a base plate 11, a rotating shaft 12, a supporting ring 13 and a capacity cylinder 14; the rotating shaft 12 is rotatably suspended on the base plate 11; there is a first spacing between the supporting ring 13 and the base plate 11, the supporting ring 13 is fixedly connected to the rotating shaft 12, and the supporting ring 13 is symmetrical about the rotating shaft 12; the capacity cylinder 14 can be inserted into the supporting ring 13.

[0033] In this embodiment, the capacity cylinder 14 is used to contain the aggregate sample to be tested; it is easy to understand that the top of the bottom plate 11 is a horizontal plane, which replaces the ground to hit the bottom of the capacity cylinder 14, so that the aggregate sample in the capacity cylinder 14 can be stacked more tightly after being hit; by arranging a rotating shaft 12 above the bottom plate 11, a supporting ring 13 is fixedly arranged on the rotating shaft 12, and the capacity cylinder 14 is inserted into the supporting ring 13, so that the initial position and initial height of the capacity cylinder 14 before each impact are fixed, and the rotating shaft 12 can be By rotating, the capacity cylinder 14 and the supporting ring 13 can also rotate, so that the capacity cylinder 14 can be tilted and collide with the bottom plate 11, so that the aggregate in the capacity cylinder 14 is impacted and stacked more densely; at the same time, the supporting ring 13 is symmetrical about the rotation axis 12, and when the capacity cylinder 14 is rotated and impacted on both sides of the rotation axis 12, the impact angle and strength can be basically kept consistent, so that the density of the aggregate on both sides of the rotation axis 12 of the capacity cylinder 14 after impact is basically consistent, so that the density detection result is more accurate and reliable.

[0034] The aggregate compact density testing device 1 of the present invention suspends a rotating shaft 12 on a bottom plate 11, and a supporting ring 13 is fixedly arranged on the rotating shaft 12 to support a capacity cylinder 14, so that the initial height and position of the capacity cylinder 14 are fixed, and the capacity cylinder 14 can rotate to both sides with the rotating shaft 12 to hit the bottom plate 11, so that the aggregate sample in the capacity cylinder 14 is impacted and becomes more compact and uniform; at the same time, the supporting ring 13 is symmetrical about the rotating shaft 12, and when the capacity cylinder 14 in the supporting ring 13 is impacted to both sides of the rotating shaft 12 respectively, the impact angle and strength can be basically kept consistent, so that the density of the aggregates on both sides of the capacity cylinder 14 on the rotating shaft 12 after impact is basically consistent, which effectively solves the problem in the prior art that round steel is easy to slip, resulting in different density of aggregates on both sides, resulting in deviation in density detection results.

[0035] It is easy to understand that the first distance is designed according to relevant testing standards.

[0036] It is easy to understand that the supporting ring 13 can be a hollow ring and directly fixed on the rotating shaft 12. When the capacity cylinder 14 is inserted into the supporting ring 13, the rotating shaft 12 and the supporting ring 13 can cooperate with each other to support and fix the capacity cylinder 14 to save the material of the supporting ring 13.

[0037] Optionally, a sealing plate may also be provided at the bottom of the support ring 13 to close the bottom opening of the support ring 13 , and the support ring 13 cooperates with the sealing plate to support and fix the capacity cylinder 14 .

[0038] In some embodiments, Figure 1 and Figure 2 As shown, the cross-sectional area of ​​the support ring 13 gradually decreases from the upper opening to the lower opening.

[0039] In this embodiment, by gradually reducing the cross-sectional area of ​​the support ring 13 from top to bottom and gradually tilting the inner wall of the support ring 13 from top to bottom toward the inner side of the support ring 13, it is possible to provide a certain support to the capacity cylinder 14, making the entire structure more stable. It is easy to understand that the bottom of the capacity cylinder 14 can also be a structure with a larger top and a smaller bottom, which is compatible with the structure of the support ring 13. When inserted into the support ring 13, the side wall of the capacity cylinder 14 fits the inner wall of the support ring 13, so that the capacity cylinder 14 is not easy to shake in the support ring 13.

[0040] Specifically, in some embodiments, Figure 1 and Figure 2 As shown, the support ring 13 is in the shape of a truncated cone.

[0041] In this embodiment, it is easy to understand that in order to save materials as much as possible while ensuring the capacity, the capacity cylinder 14 is usually designed to be cylindrical or truncated cone. Correspondingly, the support ring 13 can also be set to be truncated cone to better fit the bottom of the capacity cylinder 14, so that the capacity cylinder 14 is more stable and reliable in the support ring 13.

[0042] In some embodiments, the sum of the distance between the rotating shaft 12 and the bottom plate 11 and the diameter of the rotating shaft 12 is 16 mm.

[0043] In this embodiment, by reasonably setting the height and diameter of the rotating shaft 12, the vertical distance from the bottom plate 11 to the top of the rotating shaft 12 is 16 mm, so that the initial height of the capacity cylinder 14 before impact meets the relevant test standards, thereby increasing the validity of the test results.

[0044] In a specific embodiment, the diameter of the rotating shaft 12 is 14 mm, and the distance between the bottom of the rotating shaft 12 and the top of the bottom plate 11 is 2 mm.

[0045] In some embodiments, Figure 1 and Figure 2As shown, two bases 15 are fixedly mounted on the bottom plate 11 , and both bases 15 are located outside the supporting ring 13 . Both ends of the rotating shaft 12 can be rotatably mounted on the corresponding bases 15 .

[0046] In this embodiment, a base 15 is provided on the bottom plate 11, and the base 15 supports the rotating shaft 12 at both ends of the rotating shaft 12, so that the rotating shaft 12 is more stable and reliable; at the same time, the two bases 15 are located outside the supporting ring 13 to avoid interference with the rotating supporting ring 13 and the capacity cylinder 14, and the structure is simple and practical.

[0047] In some embodiments, both ends of the rotating shaft 12 are connected to the corresponding base 15 through a bearing respectively.

[0048] In this embodiment, a bearing is provided between the rotating shaft 12 and the base 15 to reduce the friction force when the base 15 and the rotating shaft 12 rotate relative to each other, so that the rotation is smoother when the impact is performed, and the structure is simple, convenient and practical.

[0049] In some embodiments, Figure 1 and Figure 2 As shown, the aggregate compact density testing device 1 further includes at least two stoppers 16 , which are sleeved on the rotating shaft 12 , and the end faces of the two stoppers 16 are respectively in contact with the end faces of the two bases 15 which are away from each other.

[0050] In this embodiment, two limit members 16 are provided at both ends of the rotating shaft 12. When the rotating shaft 12 is installed on two bases 15, the two limit members 16 are respectively located on the outside of the two bases 15, and the end faces of the two limit members 16 are respectively abutted against the two bases 15 to limit the rotating shaft 12 and prevent the rotating shaft 12 from sliding axially, making the entire structure more stable and reliable.

[0051] Specifically, in some embodiments, a threaded hole is provided on the limit member 16 ; a thread matching the threaded hole is provided at a position of the rotating shaft 12 corresponding to the limit member 16 , and the rotating shaft 12 passes through the threaded hole and is threadedly connected to the limit member 16 .

[0052] In this embodiment, a threaded hole is provided on the stopper 16, and a thread is provided on the rotating shaft 12 accordingly, so as to install the rotating shaft 12 on the base 15. Specifically, before installing the rotating shaft 12 on the base 15, the stopper 16 can be removed from the rotating shaft 12 first, so as to insert the rotating shaft 12 into the shaft hole of the base 15. After the rotating shaft 12 is installed, two stoppers 16 can be respectively sleeved on the rotating shaft 12 from both ends of the rotating shaft 12, and tightened at corresponding positions of the rotating shaft 12, so that the two stoppers 16 can clamp the two bases 15, thereby fixing the relative positions of the base 15 and the rotating shaft 12 in the axial direction.

[0053] Optionally, in some embodiments, Figure 1 and Figure 2 As shown, the limit member 16 includes a first limit member 161 and a second limit member 162; the threaded holes of the first limit member 161 and the second limit member 162 have opposite rotation directions, the opposite end faces of the first limit member 161 and the second limit member 162 abut against each other, and the other end face of the first limit member 161 or the second limit member 162 abuts against the base 15.

[0054] In this embodiment, one end face of the first limit member 161 or the second limit member 162 abuts against the base 15 to limit the relative position of the base 15 and the rotating shaft 12. At the same time, by setting the rotation directions of the threaded holes of the first limit member 161 and the second limit member 162 in opposite directions, the first limit member 161 and the second limit member 162 abut against each other, so that the first limit member 161 and the second limit member 162 can limit each other, so as to avoid that when the rotating shaft 12 rotates relative to the base 15, the friction of the base 15 drives the first limit member 161 or the second limit member 162 to rotate, thereby causing the first limit member 161 to slide axially along the thread, resulting in limitation failure.

[0055] Optionally, in some embodiments, a first clamping portion is provided on the supporting ring 13, and a second clamping portion adapted to the first clamping portion is provided on the capacity cylinder 14, and the first clamping portion and the second clamping portion are clamped with each other.

[0056] In this embodiment, by respectively providing the first clamping portion and the second clamping portion on the supporting ring 13 and the capacity cylinder 14, when the capacity cylinder 14 is inserted into the supporting ring 13, the first clamping portion and the second clamping portion are clamped with each other to lock the capacity cylinder 14 and the supporting ring 13 with each other, so that the capacity cylinder 14 and the supporting ring 13 are more firm and stable.

[0057] The test results of multiple close packing density tests on the same batch of samples by the same tester using the aggregate close packing density test device 1 of the above embodiment and the test method using round steel are shown in Table 1.

[0058] Table 1

[0059]

[0060] It can be seen that in multiple tests, the test results of the dense packing density test performed by the aggregate dense packing density testing device 1 of this embodiment are more stable and consistent.

[0061] Table 2 shows the test results of different testers using the aggregate dense packing density test device 1 of the above embodiment and the round steel test method to test the dense packing density of the same batch of samples.

[0062] Table 2

[0063]

[0064]

[0065] It can be seen that in multiple tests, the test results of the dense packing density test performed by the aggregate dense packing density test device 1 of this embodiment are more stable and consistent.

[0066] The above described embodiments are merely illustrative, and some or all of the modules may be selected according to actual needs to achieve the purpose of the embodiments. Those skilled in the art may understand and implement the embodiments without creative effort.

[0067] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.

Claims

1. An aggregate compact packing density testing device, characterized in that: include: Bottom plate, A rotating shaft, the rotating shaft is rotatably suspended on the bottom plate; A supporting ring has a first spacing with the bottom plate, the supporting ring is fixedly connected to the rotating shaft, and the supporting ring is symmetrical about the rotating shaft; A capacity cylinder, which can be inserted into the supporting ring.

2. The aggregate compact packing density testing device according to claim 1, characterized in that: The cross-sectional area of ​​the support ring gradually decreases from the upper opening to the lower opening.

3. The aggregate compact packing density testing device according to claim 2, characterized in that: The supporting ring is in the shape of a truncated cone.

4. The aggregate compact packing density testing device according to claim 1, characterized in that: The sum of the distance between the rotating shaft and the bottom plate and the diameter of the rotating shaft is 16 mm.

5. The aggregate compact packing density testing device according to claim 1, characterized in that: Two bases are fixedly mounted on the bottom plate, and both bases are located outside the supporting ring. Both ends of the rotating shaft can be rotatably mounted on the corresponding bases.

6. The aggregate compact packing density testing device according to claim 5, characterized in that: Both ends of the rotating shaft are connected to the corresponding base through a bearing respectively.

7. The aggregate compact packing density testing device according to claim 5, characterized in that: It also includes at least two limiting members, the two limiting members are sleeved on the rotating shaft, and the end faces of the two limiting members are respectively in contact with the end faces of the two bases that are away from each other.

8. The aggregate compact packing density testing device according to claim 7, characterized in that: The limiting member is provided with a threaded hole; the rotating shaft is provided with a thread matched with the threaded hole at a position corresponding to the limiting member, and the rotating shaft passes through the threaded hole and is threadedly connected with the limiting member.

9. The aggregate compact packing density testing device according to claim 8, characterized in that: The limiting member includes a first limiting member and a second limiting member; The threaded holes of the first limiting member and the second limiting member have opposite rotation directions, the opposite end faces of the first limiting member and the second limiting member abut against each other, and the other end face of the first limiting member or the second limiting member abuts against the base.

10. The aggregate compact packing density testing device according to claim 1, characterized in that: The supporting ring is provided with a first clamping portion, and the capacity cylinder is provided with a second clamping portion adapted to the first clamping portion, and the first clamping portion and the second clamping portion are clamped with each other.

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