Sampling device for concrete production

Abstract

Belonging to the technical field of concrete production, the invention discloses a sampling device for concrete production, which comprises a concrete bin for holding concrete, a concrete stirring assembly for stirring concrete, and a sampling assembly mounted on the concrete bin. The concrete stirring assembly comprises a support installed at the upper end of a concrete material, a first rotation driving device fixed to the support, a center rotating shaft connected to the output end of the first rotation driving device and stirring blades installed on the outer side of the center rotating shaft, and the center rotating shaft stretches into the concrete bin in the axial direction of the concrete bin. The sampling assembly comprises a first gear, a second gear, an eccentric rotating shaft, a cam, a deflector rod, a rotating pin, a torsion reset device, a sector gear, a rack and a radial sampling pipe fitting. The device disclosed by the invention can be used for conveniently sampling concrete in the production process, so that the mix proportion of the concrete can meet the requirement.

Description

Technical Field

[0001] The invention belongs to the technical field of concrete production, and in particular relates to a sampling device for concrete production. Background Art

[0002] The demand for concrete has increased dramatically, especially the high performance requirements of super high-rise buildings, such as ultra-high pumping performance, high strength and high performance, and self-compacting performance. Concrete needs to go through a large number of small tests and multiple pilot tests to produce a concrete mix that meets the requirements. In order to detect the ratio of sand, stone, and cement in the concrete, it is necessary to sample and test the concrete. The sampling in the traditional process is to open the discharge valve at the bottom of the mixing tank and then discharge the sample. However, once the discharge valve is opened, due to the large inner diameter of its outlet, it will discharge a large amount of concrete, which is not convenient for sampling and testing the concrete. Summary of the invention

[0003] In view of this, an object of the present invention is to provide a sampling device for concrete production, which is convenient for sampling concrete during the production process, so that the mix ratio of concrete can meet the requirements.

[0004] In order to achieve the above object, the present invention provides the following technical solutions:

[0005] The present invention discloses a sampling device for concrete production, comprising a concrete silo for containing concrete, a concrete mixing assembly for mixing concrete, and a sampling assembly installed on the concrete silo, wherein the concrete mixing assembly comprises a bracket installed on the upper end of the concrete material, a first rotating drive device fixed on the bracket, a central rotating shaft connected to the output end of the first rotating drive device, and a mixing blade installed on the outer side of the central rotating shaft, wherein the central rotating shaft extends into the concrete silo along the axial direction of the concrete silo; the sampling assembly comprises a first gear, a second gear, an eccentric gear, and a mixing blade installed on the outer side of the central rotating shaft. A shaft, a cam, a lever, a rotating pin, a torsion reset device, a sector gear, a rack and a radial sampling tube, wherein the first gear is coaxially connected to the central rotating shaft, the second gear is meshed with the first gear, the cam is coaxially connected to the second gear through an eccentric rotating shaft, the eccentric rotating shaft is rotatably arranged on the bracket, the cam cooperates with one end of the lever, the middle part of the lever is rotatably connected to the concrete silo through a rotating pin, the other end of the lever is connected to the sector gear, the rack is connected to the radial sampling tube, and the radial sampling tube extends into the inner side of the concrete silo along the radial direction of the concrete silo.

[0006] Furthermore, the concrete silo includes an outer silo, an inner silo coaxially rotatably installed in the outer silo, and a support frame for supporting the outer silo, the outer wall of the inner silo is rotatably sealed with the inner wall of the outer silo, the silo wall of the outer silo is provided with outer through holes, the silo wall of the inner silo is provided with inner through holes corresponding to the outer through holes, and the inner through holes are evenly distributed along the circumference of the inner silo.

[0007] Furthermore, a vertical displacement driving device is installed on the concrete silo to drive the sampling assembly to move vertically. Multiple groups of outer through holes and inner through holes are vertically arranged, and the height of each group of outer through holes corresponds to that of a corresponding group of inner through holes.

[0008] Furthermore, the radial sampling tube comprises a sampling tube, a fixed tube and a pushing tube; the fixed tube is detachably mounted on the wall of the concrete silo; the sampling tube is slidingly and sealingly mounted on the inner side of the inner end of the fixed tube; a first oil chamber is formed between the bottom of the sampling tube and the bottom of the fixed tube; the pushing tube is slidingly mounted on the outer side of the outer end of the fixed tube; a second oil chamber is formed between the bottom of the pushing tube and the bottom of the fixed tube; a channel connecting the first oil chamber and the second oil chamber is provided at the bottom of the fixed tube; an elastic connecting device is connected between the sampling tube and the fixed tube.

[0009] Furthermore, the sampling tube comprises a tube body, a plurality of baffles are arranged at intervals on the inner side of the tube body, a sampling chamber is formed between two adjacent baffles, and sampling ports corresponding to the sampling chambers are opened on the side wall of the tube body.

[0010] Furthermore, the rotating pin is rotatably installed on the rotating seat, and a sliding rail that slides with the rotating seat is installed on the surface of the outer warehouse. The output end of the first rotation drive device is connected to the central rotating shaft through a sliding sleeve. The vertical displacement drive device includes a support plate fixed to the outer warehouse and a hydraulic cylinder installed on the support plate, and the output end of the hydraulic cylinder is connected to the bracket.

[0011] Furthermore, the stirring blades are connected to the central rotating shaft through a plurality of supporting rods.

[0012] The beneficial effects of the present invention are:

[0013] The present invention discloses a sampling device for concrete production. The sampling assembly is connected to a central rotating shaft. When the central rotating shaft drives a stirring blade to stir concrete, the central rotating shaft can simultaneously drive a first gear to rotate, and the first gear drives a second gear to rotate. When the second gear drives a cam to rotate, the cam can drive a lever to move, and a fan-shaped gear at the lower end of the lever can drive a rack to move radially. At this time, a radial sampling tube moves back and forth radially, so that it is convenient to sample concrete during the production process, so that the mix ratio of the concrete can meet the requirements. When the sampling is completed, the radial sampling tube can be taken out to test the concrete performance.

[0014] In the device disclosed in the present invention, by adopting a combination of a cam and a lever, the radial sampling tube can avoid the mixing blades during sampling, which not only avoids interference during automatic sampling, but also enables sampling while mixing, making the sampling of concrete more universal and accurate, thereby meeting subsequent detection requirements.

[0015] Other advantages, objectives and features of the present invention will be described in the following description and will be apparent to those skilled in the art to some extent, or those skilled in the art may be taught from the practice of the present invention. The objectives and other advantages of the present invention may be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to make the purpose, technical solution and beneficial effects of the present invention clearer, the present invention provides the following drawings for illustration:

[0017] Figure 1 The structure of the sampling device of the present invention is shown in FIG. Figure 1 ;

[0018] Figure 2 The structure of the sampling device of the present invention is shown in FIG. Figure 2 ;

[0019] Figure 3 for Figure 2 A magnified view at point A;

[0020] Figure 4 is a cross-sectional view of the sampling device;

[0021] Figure 5 It is a schematic diagram of the structure of the radial sampling pipe;

[0022] Figure 6 It is a schematic diagram of the structure of the stirring blade;

[0023] Figure 7 This is a schematic diagram of the structure of the inner warehouse.

[0024] The markings in the accompanying drawings are as follows: concrete silo 1, concrete mixing assembly 2, bracket 3, first rotation drive device 4, central shaft 5, mixing blade 6, first gear 7, second gear 8, cam 9, lever 11, rotating pin 11, torsion reset device 12, fan gear 13, rack 14, radial sampling tube 15, outer bin 16, inner bin 17, support frame 18, outer through hole 19, inner through hole 20, hydraulic cylinder 21, sampling tube 22, fixed tube 23, push tube 24, first oil chamber 25, second oil chamber 26, channel 27, elastic connecting device 28, tube body 29, baffle 30, sampling chamber 31, sampling port 32, rotating seat 33, slide rail 34, sliding sleeve 35, support plate 36, support rod 37. DETAILED DESCRIPTION

[0025] like Figures 1 to 7 As shown, the present invention discloses a sampling device for concrete production, comprising a concrete silo 1 for containing concrete, a concrete mixing assembly 2 for mixing concrete, and a sampling assembly installed on the concrete silo 1. The concrete silo 1 is generally cylindrical with a vertical axis. The mixing part of the concrete mixing assembly 2 is located on the inner side of the concrete silo 1 for mixing concrete. The sampling assembly is located and installed on the side wall of the concrete silo 1. When the sampling part extends into the concrete silo 1, the concrete can be sampled.

[0026] Furthermore, the concrete mixing assembly 2 disclosed in the present invention comprises a bracket 3 installed on the upper end of the concrete material, a first rotating drive device 4 fixed on the bracket 3, a central rotating shaft 5 connected to the output end of the first rotating drive device 4, and a mixing blade 6 installed on the outer side of the central rotating shaft 5, wherein the central rotating shaft 5 extends into the concrete silo 1 along the axial direction of the concrete silo 1; the first rotating drive device 4 of the present invention adopts a motor, and generally speaking, when the bracket 3 moves up and down, it can drive the motor to move up and down. When the motor drives the central rotating shaft 5 to rotate, the central rotating shaft 5 can drive the mixing blade 6 to rotate, and the mixing blade 6 can thereby mix the concrete in the concrete silo 1, so that the powder ratio in the concrete is more uniform, which is convenient for sampling and testing.

[0027] Specifically, the sampling assembly disclosed in the present invention includes a first gear 7, a second gear 8, an eccentric shaft, a cam 9, a lever 11, a rotating pin 11, a torsion reset device 12, a sector gear 13, a rack 14 and a radial sampling tube 15. The first gear 7 is located at the lower side of the motor, and the plane where the first gear 7 is located is parallel to the horizontal plane. The first gear 7 is coaxially connected to the central shaft 5 and can rotate synchronously with the central shaft 5.

[0028] Furthermore, the second gear 8 is at the same height as the first gear 7 and meshes with the first gear 7. The cam 9 is coaxially connected to the second gear 8 through an eccentric shaft. The eccentric shaft is rotatably arranged on the bracket 3. The cam 9 cooperates with one end of the lever 11. The middle part of the lever 11 is rotatably connected to the concrete silo 1 through the rotating pin 11. The other end of the lever 11 is connected to the fan gear 13. The rack 14 is connected to the radial sampling tube 15. The radial sampling tube 15 extends into the inner side of the concrete silo 1 along the radial direction of the concrete silo 1.

[0029] The specific sampling process is as follows: by connecting the sampling assembly to the central rotating shaft 5, the sampling assembly is installed in the present invention, and then the motor is started. The motor is supported by the bracket 3, and the motor drives the central rotating shaft 5 to rotate. When the central rotating shaft 5 drives the stirring blade 6 to stir the concrete, the central rotating shaft 5 can simultaneously drive the first gear 7 to rotate coaxially, and at this time the first gear 7 drives the second gear 8 meshing with it to rotate, and the second gear 8 can drive the eccentric rotating shaft and cam 9 coaxial with it to rotate, and the surface of the cam 9 cooperates with one end of the lever 11, and can drive the lever 11 to deflect around the rotating pin 11. After the lever 11 rotates, the fan-shaped gear 13 at the lower end of the lever 11 can drive the rack 14 meshing with it to move radially, and at this time the radial sampling pipe 15 connected to the rack 14 reciprocates along the radial direction. In the process of the radial sampling pipe 15 continuously extending into the concrete silo 1, the concrete can be sampled multiple times, and it is convenient for the concrete to be sampled during the production process, so that the mix ratio of the concrete can meet the requirements, and the technical problem is solved.

[0030] In this embodiment, the concrete silo 1 includes an outer bin 16, an inner bin 17 coaxially rotatably installed in the outer bin 16, and a support frame 18 for supporting the outer bin 16. The outer bin 16 is cylindrical, and a support ring for supporting the inner bin 17 is provided at the lower end. A pressure ring is correspondingly provided on the outer side of the support ring, and a ball is installed between the support ring and the pressure ring to reduce the friction generated when relative displacement occurs between the inner bin 17 and the outer bin 16. When the support frame 18 is used to support the outer bin 16, it can also support the inner bin 17 at the same time. At this time, the support frame 18 plays a role in supporting the entire device.

[0031] As a further improvement of this embodiment, the outer wall of the inner bin 17 is rotatably sealed with the inner wall of the outer bin 16 to prevent the concrete slurry from entering the gap between the inner bin 17 and the outer bin 16 when the inner bin 17 rotates relative to the outer bin 16. An outer through hole 19 is provided on the bin wall of the outer bin 16, and an inner through hole 20 corresponding to the outer through hole 19 is provided on the bin wall of the inner bin 17. The inner through holes 20 are evenly distributed along the circumference of the inner bin 17. In the embodiment of the present invention, each group of inner through holes 20 has a plurality of inner through holes. When the outer through hole 19 is aligned with one of the inner through holes 20, the concrete at the circumferential position can be sampled. It can be understood that when the inner bin 17 is rotated relative to the outer bin 16, different inner through holes 20 can be made to correspond to the outer through holes 19, so that concrete at different positions can be sampled. After sampling the concrete at multiple circumferential positions, more comprehensive test data can be provided.

[0032] In this embodiment, a vertical displacement driving device for driving the sampling assembly to move vertically is installed on the concrete silo 1. Multiple groups of external through holes 19 and internal through holes 20 are provided vertically, and each group of external through holes 19 corresponds to the height of a corresponding group of internal through holes 20. The vertical displacement driving device is used to drive the sampling assembly to move in the vertical direction, so that the sampling assembly cooperates with external through holes 19 of different heights to meet the sampling needs of concrete of different heights. It is worth noting that when the sampling assembly is connected with one of the external through holes, the remaining external through holes 19 are closed by a cover to prevent concrete from overflowing.

[0033] In this embodiment, the radial sampling pipe member 15 includes a sampling tube 22, a fixed tube 23 and a push tube 24, and the three tubes are coaxial and arranged along the radial direction of the concrete silo 1. The outer end of the sampling tube 22 is closed, and the fixed tube 23 is detachably mounted on the silo wall of the concrete silo 1. The fixed tube 23 and the external through hole 19 can be connected by threads, which facilitates the connection and improves the sealing performance. The length of the fixed tube 23 extending into the concrete silo 1 can be adjusted at any time.

[0034] As a further improvement of the embodiment of the present invention, the sampling tube 22 is slidably sealed and installed inside the inner end of the fixed tube 23. The front end of the sampling tube 22 is mainly used for sampling. The bottom of the sampling tube 22 and the bottom of the fixed tube 23 are separated to form a first oil chamber 25. The push tube 24 is slidably installed outside the outer end of the fixed tube 23. The bottom of the push tube 24 and the bottom of the fixed tube 23 are separated to form a second oil chamber 26. The bottom of the fixed tube 23 is provided with a channel 27 connecting the first oil chamber 25 and the second oil chamber 26. An elastic connection device 28 is connected between the sampling tube 22 and the fixed tube 23. The first oil chamber 25 and the second oil chamber 26 are filled with hydraulic oil. When the sector gear 13 drives the rack 14 and the push tube 24 to move outward, the amount of oil in the second oil chamber 26 is reduced, thereby generating negative pressure on the first oil chamber 25. After the amount of oil in the first oil chamber 25 is reduced, under the action of negative pressure, the sampling tube 22 can also be driven to move outward, thereby avoiding the stirring blades at this time, avoiding interference, and forming an avoidance cycle. On the contrary, when the sector gear 13 drives the rack 14 and the push tube 24 to move inward, the hydraulic oil can push the sampling tube 22 to move inward for sampling. The entire device adopts a purely mechanical structure, operates more stably, and can save control costs.

[0035] In this embodiment, the sampling tube 22 includes a tube body 29, and a plurality of baffles 30 are arranged at intervals inside the tube body 29. A sampling chamber is formed between two adjacent baffles 30, and a sampling port 32 corresponding to the sampling chamber is provided on the side wall of the tube body 29. By providing a plurality of sampling chambers, multiple portions of concrete can be sampled at one time, which is convenient for testing. When concrete needs to be taken out, the window provided on the tube body 29 can be opened.

[0036] In this embodiment, the rotating pin 11 is rotatably mounted on the rotating seat 33, and a slide rail 34 that slides with the rotating seat 33 is installed on the surface of the outer bin 16. The output end of the first rotating drive device 4 is connected to the central rotating shaft 5 through a sliding sleeve 35. The vertical displacement drive device includes a support plate 36 fixed to the outer bin 16 and a hydraulic cylinder 21 installed on the support plate 36. The output end of the hydraulic cylinder 21 is connected to the bracket 3. The hydraulic cylinder 21 drives the overall displacement, and the operation of the device is more stable. The torsion reset device 12 of the present invention adopts a reset torsion spring, which is arranged on the outside of the rotating pin 11. The two ends of the reset torsion spring are respectively connected to the rotating seat 33 and the lever 11, which can provide an elastic torsional restoring force for the lever 11 when it moves.

[0037] In this embodiment, the mixing blades 6 are connected to the central rotating shaft 5 through a plurality of support rods 37. The support rods 37 are arranged through diagonal braces, and can also cooperate with the mixing of concrete, so that the mixing is more thorough.

[0038] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made in form and details without departing from the scope defined by the claims of the present invention.

Claims

1. A sampling device for concrete production, comprising a concrete silo for containing concrete, a concrete mixing assembly for mixing concrete, and a sampling assembly installed on the concrete silo, characterized in that: The concrete mixing assembly comprises a bracket installed on the upper end of the concrete material, a first rotating drive device fixed on the bracket, a central rotating shaft connected to the output end of the first rotating drive device, and a mixing blade installed on the outer side of the central rotating shaft, wherein the central rotating shaft extends into the concrete silo along the axial direction of the concrete silo; the sampling assembly comprises a first gear, a second gear, an eccentric rotating shaft, a cam, a lever, a rotating pin, a torsion reset device, a sector gear, a rack and a radial sampling pipe fitting, wherein the first gear is coaxially connected to the central rotating shaft, the second gear is meshed with the first gear, the cam is coaxially connected to the second gear through the eccentric rotating shaft, the eccentric rotating shaft is rotatably arranged on the bracket, the cam cooperates with one end of the lever, the middle part of the lever is rotatably connected to the concrete silo through the rotating pin, the other end of the lever is connected to the sector gear, the rack is connected to the radial sampling pipe fitting, and the radial sampling pipe fitting extends into the inner side of the concrete silo along the radial direction of the concrete silo.

2. A sampling device for concrete production according to claim 1, characterized in that: The concrete silo includes an outer silo, an inner silo coaxially rotatably installed in the outer silo, and a support frame for supporting the outer silo. The outer wall of the inner silo is rotatably sealed with the inner wall of the outer silo. The silo wall of the outer silo is provided with outer through holes, and the silo wall of the inner silo is provided with inner through holes corresponding to the outer through holes. The inner through holes are evenly distributed along the circumference of the inner silo.

3. A sampling device for concrete production according to claim 2, characterized in that: The concrete silo is provided with a vertical displacement driving device for driving the sampling assembly to move vertically. The outer through holes and the inner through holes are provided with multiple groups vertically, and each group of outer through holes corresponds to the height of a corresponding group of inner through holes.

4. A sampling device for concrete production according to claim 3, characterized in that: The radial sampling pipe fitting comprises a sampling tube, a fixed tube and a pushing tube. The fixed tube is detachably mounted on the wall of a concrete silo. The sampling tube is slidingly and sealingly mounted on the inner side of the inner end of the fixed tube. A first oil chamber is formed between the bottom of the sampling tube and the bottom of the fixed tube. The pushing tube is slidingly mounted on the outer side of the outer end of the fixed tube. A second oil chamber is formed between the bottom of the pushing tube and the bottom of the fixed tube. A channel connecting the first oil chamber and the second oil chamber is provided at the bottom of the fixed tube. An elastic connecting device is connected between the sampling tube and the fixed tube.

5. A sampling device for concrete production according to claim 4, characterized in that: The sampling tube comprises a tube body, a plurality of baffles are arranged at intervals inside the tube body, a sampling chamber is formed between two adjacent baffles, and sampling ports corresponding to the sampling chambers are opened on the side wall of the tube body.

6. A sampling device for concrete production according to claim 3, characterized in that: The rotating pin is rotatably mounted on the rotating seat, and a sliding rail that slides with the rotating seat is installed on the surface of the outer warehouse. The output end of the first rotating drive device is connected to the central rotating shaft through a sliding sleeve. The vertical displacement drive device includes a support plate fixed to the outer warehouse and a hydraulic cylinder installed on the support plate, and the output end of the hydraulic cylinder is connected to the bracket.

7. A sampling device for concrete production according to claim 1, characterized in that: The stirring blades are connected to the central rotating shaft through a plurality of supporting rods.

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