Sand filling cylinder for detecting compactness of roadbed and pavement

Abstract

The utility model discloses a sand filling cylinder for detecting the compactness of a roadbed and a pavement, and belongs to the technical field of sand filling cylinders. A sand inlet is formed in the top end of the sand filling cylinder, a guide pipe is connected to the bottom end of the sand filling cylinder, a fixing rod and a cleaning structure are connected to the bottom end of the inner wall of the sand filling cylinder, the cleaning structure is installed in the sand filling cylinder, the cleaning structure comprises a rotating shaft, a connecting shaft and a cleaning rod, and the rotating shaft is installed on the top wall of the fixing rod and fixedly connected with the connecting shaft; the connecting shaft is fixedly connected with the cleaning rod, and the flow limiting pipe is installed at the bottom end of the guide pipe. The cleaning rod rotates along the inner wall of the sand filling cylinder to clean residual sand on the inner wall of the sand filling cylinder, the connecting shaft is arranged and is triangular, so that the sand can be prevented from falling to the surface of the connecting shaft, and the connecting shaft at the bottom end of the rotating shaft can clean possible residual sand on the surface of the fixing rod.

Description

Technical Field

[0001] The utility model belongs to the technical field of sand filling cylinders, in particular to a sand filling cylinder for detecting the compaction degree of roadbed and pavement. Background Art

[0002] The sand filling method is one of the main means of testing the compaction of highway subgrade. The basic principle is to use clean and uniform sand with a particle size of 0.30-0.60mm or 0.25-0.50mm to freely fall from a certain height into a test hole, and measure the volume of the test hole according to the principle of constant unit weight (that is, using standard sand to replace the aggregate in the test hole). The actual dry density of the sample is calculated based on the moisture content of the aggregate. During use, the existing sand filling cylinder for roadbed and pavement compaction testing needs to place the base plate and standard sand at the bottom of the sand filling cylinder, and the circular holes in the middle of the three need to be aligned in sequence. The cumbersome alignment operation and the possible rollover during use increase the burden on the staff and also affect the measurement results.

[0003] Chinese patent publication number CN213328976U discloses a sand filling barrel for testing the compaction of roadbed and pavement. The patent fixes the base plate and standard sand at the bottom of the sand filling barrel by adjusting the fixed rod upward to engage the movable clamping block, thereby preventing the sand filling barrel from tipping over during use, thereby reducing the workload of testing. By turning the knob, the two movable blocks are moved to the sand hole to engage and block the sand hole, which greatly simplifies the operating steps of closing the sand hole of the traditional sand filling barrel and improves the work efficiency of testing. However, after the test is completed, a part of sand will remain on the inner wall of the sand filling barrel. If sand of different particle sizes is replaced for subsequent testing, the two particle sizes of sand will be mixed together, affecting the test results.

[0004] In view of this, the present utility model is proposed. Utility Model Content

[0005] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a sand filling cylinder for detecting the compaction degree of roadbed and pavement, thereby solving the problems raised in the above-mentioned background technology.

[0006] In order to solve the above technical problems, the basic concept of the technical solution adopted by the present invention is:

[0007] A sand filling cylinder for detecting the compaction degree of roadbed and pavement comprises: a sand filling cylinder, a sand inlet being installed at the top of the sand filling cylinder, a guide tube being connected to the bottom end of the sand filling cylinder, a fixed rod being connected to the bottom end of the inner wall of the sand filling cylinder, a cleaning structure being installed inside the sand filling cylinder, the cleaning structure comprising a rotating shaft, a connecting shaft and a cleaning rod, the rotating shaft being installed on the top wall of the fixed rod, the rotating shaft being fixedly connected to the connecting shaft, the connecting shaft being fixedly connected to the cleaning rod, a flow limiting tube being installed at the bottom end of the guide tube, a rotating part being installed inside the flow limiting tube, and a rotating shaft being connected to the side wall of the rotating part.

[0008] Optionally, a motor is connected to the top of the rotating shaft, and the motor is located at the top of the sand filling cylinder and is fixedly connected to the sand filling cylinder.

[0009] Optionally, the top end of the rotating shaft passes through the center of the top end of the sand filling cylinder, and the bottom end of the rotating shaft is rotatably connected to the fixed rod.

[0010] Optionally, there are two connecting shafts, which are located at the middle end and the bottom end of the rotating shaft respectively, and the bottom wall of the bottom connecting shaft is against the top wall of the fixed rod, and the longitudinal section of the connecting shaft is triangular.

[0011] Optionally, there are two cleaning rods, which are fixedly connected to the front and rear ends of the connecting shaft respectively, and the side walls of the cleaning rods are against the inner wall of the sand filling cylinder.

[0012] Optionally, the cross section of the fixing rod is in the shape of a cross and is fixedly connected to the bottom end of the inner wall of the sand filling cylinder.

[0013] Optionally, the rotating member is spherical and has through holes at both ends. The diameter of the through holes is the same as the diameter of the flow limiting tube. The rotating member is rotatably connected to the flow limiting tube, and the rotating shaft passes through the side wall of the flow limiting tube and is fixedly connected to the side wall of the rotating member.

[0014] After adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art. Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described below at the same time:

[0015] 1. By setting a cleaning rod, start the motor, the motor drives the rotating shaft to rotate, the rotation of the rotating shaft will drive the connecting shaft and the cleaning rod to rotate together, so that the cleaning rod rotates along the inner wall of the sand filling cylinder, thereby cleaning the sand remaining on the inner wall of the sand filling cylinder;

[0016] 2. By providing a connecting shaft and setting the connecting shaft in a triangular shape, sand can be prevented from falling onto the surface of the connecting shaft. The connecting shaft at the bottom of the rotating shaft can clean the sand that may remain on the surface of the fixed rod;

[0017] 3. By setting a flow-limiting tube and a rotating part, when the through-hole on the rotating part is completely aligned with the flow-limiting tube, the sand can flow out smoothly at the maximum flow rate. By rotating the rotating shaft to rotate the rotating part to a certain angle, the through-hole and the flow-limiting tube are not completely aligned, which can limit the flow of the sand, avoiding operational errors and repeated operations caused by excessive or insufficient sand flow, thereby saving detection time and improving work efficiency.

[0018] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings described below are only some embodiments. A person skilled in the art can derive other drawings based on these drawings without inventive effort. In the drawings:

[0020] Figure 1 It is a schematic diagram of the overall structure;

[0021] Figure 2 Schematic diagram of the internal structure of the sand filling cylinder;

[0022] Figure 3 It is a schematic diagram of the cleaning structure;

[0023] Figure 4 Schematic diagram of the cross-sectional structure of the flow limiting tube;

[0024] Figure 5 It is a schematic diagram of the structure after the rotating part rotates;

[0025] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0026] 1. Sand filling cylinder; 2. Sand inlet; 3. Guide tube; 4. Flow limiting tube; 5. Rotating shaft; 6. Motor; 7. Rotating shaft; 8. Connecting shaft; 9. Cleaning rod; 10. Fixed rod; 11. Rotating part.

[0027] It should be noted that these drawings and textual descriptions are not intended to limit the conceptual scope of the present invention in any way, but rather to illustrate the concept of the present invention for those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0028] The present invention will now be described in further detail with reference to the accompanying drawings.

[0029] See also Figure 1-5The chute 1 is provided with a guide tube 3, and the guide tube 3 can guide the sand into the flow-limiting tube 4. The bottom end of the inner wall of the chute 1 is connected with a fixed rod 10, which plays the role of supporting the rotating shaft 7. The cleaning structure is installed inside the chute 1. The cleaning structure includes a rotating shaft 7, a connecting shaft 8 and a cleaning rod 9. The cleaning rod 9 can clean the inside of the chute 1 to prevent sand residue from affecting the accuracy of subsequent detection. The rotating shaft 7 is installed on the top wall of the fixed rod 10, the rotating shaft 7 is fixedly connected to the connecting shaft 8, and the connecting shaft 8 is fixedly connected to the cleaning rod 9. The flow-limiting tube 4 is installed at the bottom end of the guide tube 3. A rotating part 11 is installed inside the flow-limiting tube 4. The side wall of the rotating part 11 is connected with a rotating shaft 5, which can realize the control of the outflow speed and flow of the sand material to meet the requirements of different detection conditions and accuracy.

[0030] In this embodiment, a motor 6 is connected to the top of the rotating shaft 7. The motor 6 is located at the top of the sand filling cylinder 1 and is fixedly connected to the sand filling cylinder 1. The motor 6 drives the rotating shaft 7 to rotate, and then the connecting shaft 8 and the cleaning rod 9 connected thereto can rotate accordingly, thereby realizing the cleaning operation of the inside of the sand filling cylinder 1.

[0031] The top end of the rotating shaft 7 passes through the center of the top of the sand filling cylinder 1, and the bottom end of the rotating shaft 7 is rotatably connected to the fixed rod 10, so that the rotating shaft 7 has stable support and rotation inside the sand filling cylinder 1. When the motor 6 drives the rotating shaft 7 to rotate, since the top end passes through the center of the top of the sand filling cylinder 1, it can ensure that the position of the rotating shaft 7 in the vertical direction is stable without offset or shaking. The rotational connection between the bottom end and the fixed rod 10 provides support for the smooth rotation of the rotating shaft 7, reduces friction resistance, and makes the entire rotation process more stable and flexible, which helps to improve the working efficiency and stability of the cleaning structure and ensure effective cleaning of the inside of the sand filling cylinder 1.

[0032] There are two connecting shafts 8, which are located at the middle and bottom ends of the rotating shaft 7 respectively, and the bottom wall of the bottom connecting shaft 8 is against the top wall of the fixed rod 10. The longitudinal section of the connecting shaft 8 is triangular. When the bottom connecting shaft 8 rotates, the sand on the surface of the fixed rod 10 can be cleaned to prevent sand from remaining on the surface of the fixed rod 10 after the inspection. After the sand enters the sand filling barrel 1, the sand that falls to the surface of the connecting shaft 8 will fall downward along the oblique sides of the connecting shaft 8, thereby preventing sand from accumulating on the surface of the connecting shaft 8.

[0033] There are two cleaning rods 9, which are fixedly connected to the front and rear ends of the connecting shaft 8 respectively, and the side walls of the cleaning rods 9 are against the inner wall of the sand filling cylinder 1. Since the side walls of the cleaning rods 9 are against the inner wall of the sand filling cylinder 1, the inner wall of the sand filling cylinder 1 can be directly scraped during the rotation process to remove the sand attached to it, thereby achieving the purpose of cleaning the inside of the sand filling cylinder 1.

[0034] The cross section of the fixing rod 10 is in the shape of a cross and is fixedly connected to the bottom end of the inner wall of the sand filling cylinder 1. While ensuring the structural strength, it reduces the excessive occupation of the internal space of the sand filling cylinder 1 and improves the efficiency of sand falling into the guide tube 3. The cross-shaped fixing rod 10 can provide a relatively balanced supporting force, so that it is not easy to be deformed or damaged when it is subjected to the pressure and torque brought by the rotating shaft 7.

[0035] The rotating part 11 is spherical and has through holes at both ends. The diameter of the through holes is the same as that of the flow limiting tube 4. The rotating part 11 is rotatably connected to the flow limiting tube 4, and the rotating shaft 5 passes through the side wall of the flow limiting tube 4 and is fixedly connected to the side wall of the rotating part 11. When the through hole is completely aligned with the flow limiting tube 4, the sand can pass through smoothly. When the rotating part 11 rotates a certain angle and the through hole is not completely aligned with the flow limiting tube 4, the flow of the sand can be limited. By operating the rotating shaft 5, the rotating part 11 can be driven to rotate, thereby controlling the outflow of the sand. In actual testing, if it is necessary to release the sand slowly and evenly, the opening size of the flow limiting tube 4 can be controlled by adjusting the rotating part 11 to achieve precise sand filling operation, ensure the uniformity and stability of each sand filling, and reduce the filling amount error caused by unstable sand flow.

[0036] During the inspection, sand is poured into the sand inlet 2 at the top of the sand filling cylinder 1. Under the action of gravity, the sand passes through the inside of the sand filling cylinder 1 and enters the flow limiting tube 4 through the guide tube 3 at the bottom. The angle of the rotating part 11 is adjusted by rotating the rotating shaft 5. When the through hole on the rotating part 11 is completely aligned with the flow limiting tube 4, the sand can flow out smoothly at the maximum flow rate, and the sand filling operation of the compaction test is carried out. When it is necessary to control the outflow speed and flow rate of the sand, the rotating shaft 5 is rotated to rotate the rotating part 11 to a certain angle, and the through hole is not completely aligned with the flow limiting tube 4, thereby limiting the flow rate of the sand.

[0037] After the detection is completed, the motor 6 is started, and the motor 6 drives the rotating shaft 7 to rotate. Since the rotating shaft 7 is fixedly connected to the connecting shaft 8, and the connecting shaft 8 is fixedly connected to the cleaning rod 9, the rotation of the rotating shaft 7 will drive the connecting shaft 8 and the cleaning rod 9 to rotate together. During the rotation process, the cleaning rod 9 and the connecting shaft 8 located at the bottom end of the rotating shaft 7 can clean the sand material that may remain inside the sand filling cylinder 1 and on the surface of the fixed rod 10.

[0038] The present invention is not limited to the above-described embodiments. Any structural changes made under the guidance of the present invention should be understood by anyone. Any technical solution that is the same or similar to the present invention falls within the scope of protection of the present invention. The technology, shape, and structure not described in detail in the present invention are all known technologies.

Claims

1. A sand filling drum (1) for detecting the compaction degree of roadbed and pavement, characterized in that: include: A sand filling cylinder (1), wherein a sand inlet (2) is installed at the top of the sand filling cylinder (1), a guide tube (3) is connected to the bottom of the sand filling cylinder (1), and a fixing rod (10) is connected to the bottom of the inner wall of the sand filling cylinder (1); a cleaning structure is installed inside the sand filling cylinder (1), and the cleaning structure comprises a rotating shaft (7), a connecting shaft (8) and a cleaning rod (9), wherein the rotating shaft (7) is installed on the top wall of the fixing rod (10), the rotating shaft (7) is fixedly connected to the connecting shaft (8), and the connecting shaft (8) is fixedly connected to the cleaning rod (9); A flow limiting tube (4) is installed at the bottom end of the guide tube (3); a rotating member (11) is installed inside the flow limiting tube (4); and a side wall of the rotating member (11) is connected to a rotating shaft (5).

2. The sand filling drum (1) for detecting the compaction degree of roadbed and pavement according to claim 1, characterized in that: The top end of the rotating shaft (7) is connected to a motor (6), and the motor (6) is located at the top end of the sand filling cylinder (1) and is fixedly connected to the sand filling cylinder (1).

3. The sand filling drum (1) for detecting the compaction degree of roadbed and pavement according to claim 1, characterized in that: The top end of the rotating shaft (7) passes through the center of the top end of the sand filling cylinder (1), and the bottom end of the rotating shaft (7) is rotatably connected to the fixing rod (10).

4. The sand filling drum (1) for detecting the compaction degree of roadbed and pavement according to claim 1, characterized in that: There are two connecting shafts (8), which are respectively located at the middle end and the bottom end of the rotating shaft (7), and the bottom wall of the bottom connecting shaft (8) abuts against the top wall of the fixing rod (10). The longitudinal section of the connecting shaft (8) is triangular.

5. The sand filling drum (1) for detecting the compaction degree of roadbed and pavement according to claim 1, characterized in that: There are two cleaning rods (9) in total, which are fixedly connected to the front and rear ends of the connecting shaft (8) respectively, and the side walls of the cleaning rods (9) are against the inner wall of the sand filling cylinder (1).

6. The sand filling drum (1) for detecting the compaction degree of roadbed and pavement according to claim 1, characterized in that: The fixing rod (10) has a cross-shaped cross section and is fixedly connected to the bottom end of the inner wall of the sand filling cylinder (1).

7. The sand filling drum (1) for detecting the compaction degree of roadbed and pavement according to claim 1, characterized in that: The rotating member (11) is spherical and has through holes at both ends. The diameter of the through holes is the same as the diameter of the flow limiting tube (4). The rotating member (11) is rotatably connected to the flow limiting tube (4). The rotating shaft (5) passes through the side wall of the flow limiting tube (4) and is fixedly connected to the side wall of the rotating member (11).

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