Discharge hopper for mixing plant and mixing plant

Abstract

The utility model relates to the field of concrete sampling, and discloses a discharge hopper for a mixing plant and the mixing plant. The discharge hopper comprises a hopper body and a discharge hopper, wherein the hopper body comprises a material cavity for receiving discharged materials of the stirrer; the sampling devices are arranged on the circumferential side wall of the hopper body at intervals, and the sampling devices are communicated with the material cavity to extract concrete samples. Furthermore, a hopper sampling opening is formed in the circumferential side wall of the hopper body, the sampling device can comprise a sampling pipe, one end of a pipe cavity of the sampling pipe is communicated with the hopper sampling opening, and a sampling discharging opening is formed in the sampling pipe. The piston is movably arranged in the pipe cavity; and the piston driving mechanism is used for driving the piston to move in the pipe cavity so as to extract the concrete sample and discharge the concrete sample through the sampling discharge port. The utility model further discloses a mixing plant which comprises a mixer and the discharge hopper. According to the scheme, the sample representativeness of the sampling result of the concrete in the material cavity is effectively improved.

Description

Technical Field

[0001] The present application belongs to the field of concrete sampling, and specifically relates to a discharge hopper and a mixing station for a mixing station. Background Art

[0002] Sampling and testing fresh concrete is an important step before it is put into use. By testing the sampled fresh concrete for multiple properties, the performance of the entire batch of fresh concrete can be fully understood. At present, when mixing station testers sample concrete, they usually unload and sample in the concrete transport truck. Specifically, a truck of concrete is generally loaded with 3-4 tanks of concrete. Each tank of concrete produced is unloaded from the mixer through the unloading hopper into the concrete transport truck. The tester then pushes the trolley to the rear trough of the concrete transport truck. At the same time, the cylinder of the concrete transport truck is reversed for unloading, and the concrete flows into the trolley through the chute to complete the sampling. Then, the tester transports the sampled concrete to the test bench. Although this sampling method is simple and easy, it often leads to insufficient representativeness of the sample because the sampling object is concrete mixed from multiple tanks. Summary of the invention

[0003] The purpose of the present application is to provide a discharge hopper and a mixing station for a mixing station, which improves the sample representativeness of concrete sampling results.

[0004] In order to achieve the above-mentioned object, the present application provides, on one hand, a discharge hopper for a mixing station, the mixing station comprising a mixer located above the discharge hopper, and the discharge hopper comprises:

[0005] The hopper body includes a material cavity for receiving the material discharged from the mixer; and

[0006] A plurality of sampling devices are arranged at intervals on the circumferential side wall of the hopper body, and the sampling devices are connected to the material cavity to extract concrete samples.

[0007] In some embodiments, a hopper sampling port is provided on the circumferential side wall of the hopper body, and the sampling device includes:

[0008] A sampling tube, one end of the tube cavity of the sampling tube is connected to the sampling port of the hopper, and a sampling outlet is provided on the sampling tube;

[0009] a piston movably disposed in the lumen; and

[0010] The piston driving mechanism is used for driving the piston to move in the tube cavity to extract the concrete sample and discharge it through the sampling outlet.

[0011] In some embodiments, the piston drive mechanism is a hydraulic cylinder, a pneumatic cylinder, or an electric cylinder.

[0012] In some embodiments, the hopper body is an upright conical funnel, the sampling tube is arranged obliquely and perpendicular to the circumferential side wall of the hopper body, and the sampling outlet is arranged on the circumferential tube wall of the sampling tube.

[0013] In some embodiments, the discharge hopper further comprises a discharge hopper valve disposed at the bottom of the material cavity.

[0014] A second aspect of the present application provides a mixing station, which includes a mixer and the above-mentioned discharge hopper for the mixing station.

[0015] In some embodiments, the mixing station further comprises:

[0016] The sample receiving cylinder is arranged below the sampling outlet of the sampling device and comprises a sample cylinder cavity for receiving the concrete sample and a cylinder cavity valve arranged at the bottom of the sample cylinder cavity;

[0017] Test benches for preparing and testing concrete test blocks; and

[0018] The sample guide tube connects the sample cylinder cavity and the test bench to guide and transport the concrete sample.

[0019] In some embodiments, the mixing station further comprises:

[0020] A weighing module, which carries and weighs the sample receiving tube;

[0021] The controller is configured as:

[0022] In response to the concrete sampling signal, the sampling device is activated to extract a concrete sample;

[0023] Determine that the weighing value of the weighing module reaches the preset value;

[0024] Controlled closure of sampling devices; and

[0025] Control to open the cylinder chamber valve.

[0026] In some embodiments, in response to the concrete sampling signal, starting the sampling device to extract the concrete sample further includes:

[0027] Actuate the discharge hopper valve to close the discharge hopper before activating the sampling device.

[0028] In some embodiments, the test bench comprises:

[0029] Vibration table;

[0030] A test block mold, which is placed on a vibrating table and receives the concrete sample conveyed by the sample guide tube; and

[0031] Testing bench for testing concrete samples.

[0032] Through the above technical scheme, a plurality of sampling devices arranged at intervals on the circumferential side wall of the hopper body extract concrete samples from the material cavity for sampling, so that multiple sampling of concrete in different areas of the material cavity can be achieved in the initial discharging stage of the same batch of concrete. Compared with the sampling method in which the sampling object is concrete mixed from multiple tanks, the sampling method of the present application avoids the influence of confounding factors in the canning process on the samples, thereby improving the independence of each sample and further improving the sample representativeness of the sampling results.

[0033] Other features and advantages of the embodiments of the present application will be described in detail in the subsequent detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The accompanying drawings are used to provide a further understanding of the embodiments of the present application and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the embodiments of the present application, but do not constitute a limitation on the embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without creative work. In the drawings:

[0035] Figure 1 It is a structural schematic diagram of a discharge hopper and a mixing station for a mixing station according to a specific embodiment of the present application;

[0036] Figure 2 for Figure 1 Cross-sectional view at the AA position.

[0037] Description of Reference Numerals

[0038] 100 Discharge hopper 130 Discharge hopper valve

[0039] 110 Hopper body 200 Sample receiving tube

[0040] 111 Hopper sampling port 210 Cylinder valve

[0041] 120 Sampling device 300 Weighing module

[0042] 121 Sampling tube 400 Test bench

[0043] 121a Sampling outlet 500 Sample guide tube

[0044] 122 Piston 123 Piston drive mechanism

[0045] 600 Blender DETAILED DESCRIPTION

[0046] The specific implementation of the present application is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the present application, and is not used to limit the present application.

[0047] The following describes a discharge hopper for a mixing station and a mixing station according to the present application with reference to the accompanying drawings.

[0048] The present application discloses a discharge hopper for a mixing station. Figure 1 As shown, in one embodiment, the mixing station includes a mixer 600 located above a discharge hopper 100, and the discharge hopper 100 includes:

[0049] The hopper body 110 includes a material cavity for receiving the material discharged from the mixer 600; and

[0050] A plurality of sampling devices 120 are arranged at intervals on the circumferential side wall of the hopper body 110 , and the sampling devices 120 are connected to the material cavity to extract concrete samples.

[0051] Compared with the existing sampling method in which the sampling object is concrete mixed in multiple tanks, the discharge hopper 100 for a mixing station of the present application is provided with multiple sampling devices 120. The sampling devices 120 can sample the concrete in the material cavity of the discharge hopper 100 before the concrete is canned, thereby avoiding the sample from being affected by the confounding factors in the canning process, improving the independence of each sample, and thus improving the sample representativeness of the sampling result. Furthermore, the multiple sampling devices 120 are arranged at intervals on the circumferential side wall of the hopper body 110, so that the sampling devices 120 can take materials from different areas, further improving the representativeness of the sampling results and the sampling efficiency of the sampling process.

[0052] like Figure 1 and Figure 2 As shown, in this embodiment, a hopper sampling port 111 is provided on the circumferential side wall of the hopper body 110. Figure 1 As shown, the sampling device 120 includes:

[0053] A sampling tube 121, one end of the tube cavity of the sampling tube 121 is connected to the hopper sampling port 111, and a sampling outlet 121a is provided on the sampling tube 121;

[0054] A piston 122 movably disposed in the lumen; and

[0055] The piston driving mechanism 123 is used to drive the piston 122 to move in the tube cavity to extract the concrete sample and discharge it through the sampling outlet 121a.

[0056] See also Figure 1 and Figure 2The piston 122 is movably disposed in the tube cavity and is in close contact with the inner wall of the tube cavity. When the piston 122 moves from the hopper sampling port 111 to the sampling outlet 121a under the drive of the piston driving mechanism 123, the material cavity and the tube cavity can be connected, and the viscous and non-flowing concrete can be extracted from the discharge hopper 100 into the sampling tube 121. When the piston 122 moves further away from the hopper sampling port 111 and moves to the sampling outlet 121a, the concrete in the tube cavity is discharged from the sampling outlet 121a and leaves the sampling tube 121 under the action of gravity and / or the pressure in the sampling tube 121. On the contrary, when the piston 122 starts to move from the sampling outlet 121a toward the hopper sampling port 111, the sampling outlet 121a can be closed and the concrete attached to the inner wall of the tube cavity can be cleaned; when the piston 122 moves further away from the sampling outlet 121a and moves to the hopper sampling port 111, the remaining concrete is pushed back from the tube cavity into the material cavity, and the hopper sampling port 111 is closed.

[0057] Of course, those skilled in the art will understand that Figure 1 The extraction sampling device shown is only an example, and the sampling device may also adopt other structural forms, such as a sampling tube equipped with a valve, which is inserted into the circumferential side wall of the hopper body 110 and can also be used as a sampling device.

[0058] In this embodiment, the piston driving mechanism 123 may be a hydraulic cylinder, a gas cylinder or an electric cylinder. The piston driving mechanism 123 used to drive the piston 122 to achieve linear reciprocating motion may be a hydraulic cylinder, a gas cylinder or an electric cylinder with a simple structure, easy to obtain and easy to accurately control, etc. The piston driving mechanism 123 is arranged in parallel with the sample receiving tube 200 and is arranged at the lower end of the sample receiving tube 200.

[0059] like Figure 1 and Figure 2 As shown, in this embodiment, the hopper body 110 is an upright conical funnel, the sampling tube 121 is arranged obliquely and perpendicular to the circumferential side wall of the hopper body 110 , and the sampling outlet 121 a is provided on the circumferential tube wall of the sampling tube 121 .

[0060] See also Figure 1 and Figure 2 The sampling outlet 121a is disposed at the lower side of the sampling tube 121, and the sampling tube 121 is arranged obliquely and perpendicular to the circumferential side wall of the hopper body 110. Therefore, the height of the sampling outlet 121a is lower than the hopper sampling port 111, so that the concrete can be discharged more smoothly from the sampling outlet 121a under the action of gravity.

[0061] In this embodiment, the discharge hopper 100 further includes a discharge hopper valve 130 disposed at the bottom of the material chamber.

[0062] After the raw materials used in concrete production are mixed evenly, the fresh concrete is discharged from the mixer 600 into the discharge hopper 100 and collected by the discharge hopper 100. Subsequently, the discharge hopper valve 130 is used to control the discharge of the discharge hopper 100. When the discharge hopper valve 130 is opened, the discharge hopper 100 starts to discharge the concrete to the concrete transport vehicle, and the discharge speed can be adjusted by the opening and closing degree of the discharge hopper valve 130.

[0063] like Figure 1 As shown, the present application also discloses a mixing station, which includes a mixer 600 and the above-mentioned discharge hopper for the mixing station.

[0064] The above-mentioned discharge hopper for the mixing station is installed directly below the mixer 600. After the raw materials for concrete production are mixed evenly, they are discharged into the discharge hopper 100 through the discharge door of the mixer 600. In this process, multiple sampling devices 120 can sample concrete from different areas of the material cavity of the discharge hopper 100, avoiding the sample from being affected by the confounding factors in the canning process, and further improving the sample representativeness of the sampling result.

[0065] like Figure 1 As shown, in this embodiment, the mixing station also includes:

[0066] The sample receiving cylinder 200 is arranged below the sampling outlet 121a of the sampling device 120 and includes a sample cylinder cavity for receiving the concrete sample and a cylinder cavity valve 210 arranged at the bottom of the sample cylinder cavity;

[0067] Test bench 400, for preparing and testing concrete test blocks; and

[0068] The sample guide tube 500 connects the sample cylinder cavity and the test bench 400 to guide and transport the concrete sample.

[0069] Specifically, after the sampling device 120 samples from the discharge hopper 100, the concrete sample is discharged from the sampling outlet 121a and enters the sample receiving cylinder 200 arranged below the sampling outlet 121a of the sampling device 120. When the amount of concrete in the sample receiving cylinder 200 reaches a predetermined value, the cylinder cavity valve 210 arranged at the bottom of the sample cylinder cavity can be opened, and the concrete sample is diverted and transported to the test bench 400 through the sample guide tube 500 connecting the sample cylinder cavity and the test bench 400. Subsequently, the concrete performance test is carried out on the test bench 400 and / or a compression test block with a size of, for example, 15 cm×15 cm×15 cm is prepared.

[0070] In this embodiment, the mixing station also includes:

[0071] A weighing module 300 , which carries and weighs the sample receiving tube 200 ;

[0072] The controller is configured as:

[0073] In response to the concrete sampling signal, the sampling device 120 is activated to extract a concrete sample;

[0074] Determine that the weighing value of the weighing module 300 reaches a preset value;

[0075] Controlling closing of the sampling device 120; and

[0076] The cylinder chamber valve 210 is controlled to open.

[0077] Specifically, after the controller receives the concrete sampling signal, the sampling device 120 is started to extract the concrete sample. The concrete sample is discharged from the sampling outlet 121a of the sampling device 120 and enters the sample receiving cylinder 200 arranged below the sampling outlet 121a of the sampling device 120. When the controller determines through the weighing module 300 that the weight of the concrete in the sample receiving cylinder 200 reaches a predetermined value, the controller drives to open the cylinder cavity valve 210 arranged at the bottom of the sample cylinder cavity, and closes the sampling device 120. Compared with the method in which the test personnel move to the rear trough of the concrete transport vehicle through a trolley, and the cylinder of the concrete transport vehicle is reversed for unloading, the concrete flows into the trolley through the chute to complete the sampling; then, the test personnel transport the sampled concrete to the test bench, the present application can accurately control the sampling amount of the concrete sample to avoid the waste of concrete; and the concrete sampling process is controlled by the controller, with a high degree of automation, which can improve the sampling efficiency and reduce the participation of personnel.

[0078] Of course, those skilled in the art will appreciate that the method for determining whether the amount of concrete in the sample receiving cylinder 200 has reached a predetermined value is not limited to the above-mentioned weighing module 300. For example, a liquid level sensor may be provided above the sample receiving cylinder 200 to measure the amount of concrete in the sample receiving cylinder 200. These should also fall within the scope of protection of the present application.

[0079] In this embodiment, in response to the concrete sampling signal, the sampling device 120 is started to extract the concrete sample, and further includes:

[0080] The discharge hopper valve 130 of the discharge hopper 100 is driven to close before the sampling device 120 is activated.

[0081] After the controller drives the discharge hopper valve 130 of the discharge hopper 100 to close, the pressure inside the concrete increases, so that the concrete can flow out from the hopper sampling port 111 more quickly, thereby increasing the sampling speed.

[0082] In this embodiment, the test bench 400 includes:

[0083] Vibration table;

[0084] A test block mold, which is placed on a vibration table and receives the concrete sample conveyed by the sample guide tube 500; and

[0085] Testing bench for testing concrete samples.

[0086] After the concrete samples are respectively guided and transported from the corresponding sample receiving tubes 200 to the test block molds on the vibration table of the corresponding test bench 400 through the sample guide tubes 500, the vibration table starts to vibrate and fill the test blocks with the concrete samples to make compression test blocks. At the same time, each test bench can respectively test the air content, mortar content, coarse aggregate content, slump, etc. of the concrete samples, and then compare and analyze the test data of each test bench 400, and judge the homogeneity of the concrete by whether the deviation of multiple groups of test data is within the preset range.

[0087] It should be noted that, in the present application, unless otherwise stated, terms such as “upper, lower, front, rear, inside, outside” generally refer to directions shown in the accompanying drawings.

[0088] In the description of the present application, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present application, "plurality" means at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0089] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like 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, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0090] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0091] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A discharge hopper for a mixing station, the mixing station comprising a mixer (600) located above the discharge hopper, characterized in that: The discharge hopper (100) comprises: A hopper body (110) comprising a material cavity for receiving the discharge of the mixer (600); and A plurality of sampling devices (120) are arranged at intervals on the circumferential side wall of the hopper body (110); the sampling devices (120) are connected to the material cavity to extract concrete samples.

2. The discharge hopper for a mixing station according to claim 1, characterized in that: A hopper sampling port (111) is provided on the circumferential side wall of the hopper body (110), and the sampling device (120) comprises: A sampling tube (121), one end of the tube cavity of the sampling tube (121) is connected to the hopper sampling port (111), and a sampling outlet (121a) is provided on the sampling tube (121); a piston (122) movably disposed in the lumen; and The piston driving mechanism (123) is used to drive the piston (122) to move in the tube cavity to extract the concrete sample and discharge it through the sampling outlet (121a).

3. The discharge hopper for a mixing station according to claim 2, characterized in that: The piston driving mechanism (123) is a hydraulic cylinder, a pneumatic cylinder or an electric cylinder.

4. The discharge hopper for a mixing station according to claim 2 or 3, characterized in that: The hopper body (110) is an upright conical funnel, the sampling tube (121) is arranged obliquely and perpendicular to the circumferential side wall of the hopper body (110), and the sampling outlet (121a) is arranged on the circumferential tube wall of the sampling tube (121).

5. The discharge hopper for a mixing station according to claim 1, characterized in that: The discharge hopper (100) further comprises a discharge hopper valve (130) arranged at the bottom of the material chamber.

6. A mixing station, characterized in that: The mixing station comprises the mixing machine (600) and a discharge hopper (100) for a mixing station according to any one of claims 1 to 5.

7. The mixing station according to claim 6, characterized in that: The mixing station also includes: A sample receiving cylinder (200) is arranged below the sampling outlet (121a) of the sampling device (120) and comprises a sample cylinder cavity for receiving a concrete sample and a cylinder cavity valve (210) arranged at the bottom of the sample cylinder cavity; A test bench (400) for preparing and testing concrete test blocks; and The sample guide tube (500) connects the sample cylinder cavity and the test bench (400) to guide and transport the concrete sample.

8. The mixing station according to claim 7, characterized in that: The mixing station also includes: A weighing module (300) for carrying and weighing the sample receiving tube (200); The controller is configured as: In response to a concrete sampling signal, the sampling device (120) is activated to extract a concrete sample; Determining that the weighing value of the weighing module (300) reaches a preset value; Controlling closing of the sampling device (120); and The cylinder chamber valve (210) is controlled to open.

9. The mixing station according to claim 8, characterized in that: In response to the concrete sampling signal, the sampling device (120) is started to extract a concrete sample, and further comprises: The discharge hopper valve (130) of the discharge hopper (100) is driven to close before the sampling device (120) is started.

10. The mixing station according to claim 7, characterized in that: The test bench (400) comprises: Vibration table; A test block mold, which is arranged on the vibration table and receives the concrete sample conveyed by the sample guide tube (500); and Testing bench for testing concrete samples.

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