Coal sample mixing device for coal quality testing

Abstract

The application discloses a coal sample mixing device for coal quality testing, which comprises a first mixing container, a container for containing coal powder, and a screen mixing mechanism arranged in the first mixing container. The coal sample mixing device for coal quality testing can mix the coal powder by the screen mixing mechanism, and the coal powder can be more fully mixed, and the mixing effect is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of material mixing, in particular to a coal sample mixing device for coal quality testing. BACKGROUND

[0002] At present, the coal industry in China has achieved sustained and stable development. The increasing demand for coal due to industrial development and population growth has made the proportion of key contract coal for thermal power enterprises unable to meet social demand. Some thermal power enterprises have turned their attention to market coal and low-quality coal, and the proportion of market coal and low-quality coal has been increasing, making the sources of coal raw materials for thermal power plants more complex, with varying qualities. It is necessary to strengthen the analysis of the calorific value of incoming coal to effectively analyze the utilization of coal.

[0003] During coal testing, the operation method of the operator and the accuracy of the equipment are particularly important. If there are problems with the operation method or errors in the system of the equipment itself, it will cause the calorific value to deviate.

[0004] Incoming coal quality detection data is an important basis for settlement, and higher requirements are put forward for coal quality analysis quality. Therefore, strengthening the control of coal quality analysis by incoming coal laboratories and stabilizing the level of coal quality analysis have become the focus of self-improvement for incoming coal detection laboratories.

[0005] During the preparation of the standard coal sample comparison sample, sample mixing and sub-packaging are key links. According to the national standard GB474-2008 "Preparation Method of Coal Sample", the manual preparation process of the coal sample includes: crushing, mixing, sub-division, drying, etc.

[0006] The current coal sample mixing device mixes the coal powder through a mixing container. The specific operation is to directly pour the treated coal powder into the mixing container for mixing. However, due to the electrostatic force, molecular attraction and capillary force of the coal powder, the coal powder particles interact with each other, especially when the coal powder is concentrated and poured into the mixing container, which is more likely to cause the coal powder to clump and form lumps, resulting in poor mixing effect of the coal powder. SUMMARY

[0007] The present application provides a coal sample mixing device for coal quality testing, which solves the technical problem of poor mixing effect in the mixing process of coal powder in the prior art.

[0008] The present application provides a coal sample mixing device for coal quality testing, which solves the technical problem of poor mixing effect in the mixing process of coal powder in the prior art.

[0009] A first mixing container for containing coal powder;

[0010] A screen mixing mechanism is arranged in the first mixing container and is used for mixing the coal powder.

[0011] In some embodiments, the screen mixing mechanism includes a screen assembly and an annular guide plate, both of which are fixedly disposed in the first mixing container. The annular guide plate is inclined downward and is located above the screen assembly.

[0012] In some embodiments, the projected width of the annular guide plate is one-fifth to two-fifths of the projected radius of the screen assembly.

[0013] In some embodiments, the screen assembly includes a first screen and a second screen, both of which are fixedly disposed inside the first mixing container, with the first screen located above the second screen.

[0014] In some embodiments, the mesh count of the first screen is smaller than that of the second screen.

[0015] In some embodiments, the first screen is conical and the second screen is planar.

[0016] In some embodiments, the screen mixing mechanism further includes a vibration assembly comprising a vibration motor and a vibration rod. The vibration motor is located outside the first mixing container, and the vibration rod is connected to the output end of the vibration motor. The vibration rod can operatively transmit vibrations to the first screen and the second screen.

[0017] In some embodiments, the screen mixing mechanism further includes a drive motor, a lever, a first contact point, and a second contact point. The lever passes through the first mixing container and is located between the first screen and the second screen. The lever is rotatably connected to the first mixing container. The first contact point is fixedly disposed at one end of the lever that extends into the first mixing container. There are two first contact points, which are disposed corresponding to the first screen and the second screen. A second contact point is fixedly disposed on both the first screen and the second screen at the position corresponding to the first contact point. The output shaft of the drive motor is parallel to the rotation shaft of the lever. An adjusting rod is fixedly disposed on the output shaft of the drive motor. An elongated hole is opened at one end of the lever located outside the first mixing container. The adjusting rod is connected to the elongated hole through a pulley. The vibrating rod is connected to the lever.

[0018] In some embodiments, the mixing device further includes a second mixing container, wherein the first mixing container is disposed above the second mixing container by a support.

[0019] In some embodiments, the second mixing container is located below the first mixing container, the diameter of the second mixing container is larger than the diameter of the first mixing container, and a lifting platform is arranged below the second mixing container, and an electric push rod is fixedly arranged at the lower end of the lifting platform.

[0020] The application has the following advantages:

[0021] The coal sample mixing device for coal quality testing provided by the application mixes the coal powder through the screen mixing mechanism arranged in the first mixing container, so that the clumped and caked parts of the coal powder can be broken up when falling onto the screen of the screen mixing mechanism, the coal powder can be more fully mixed, and the mixing effect is improved. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the application or the prior art, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the application.

[0023] Figure 1 The overall structure schematic diagram of the mixing device provided by the application is shown in the figure.

[0024] Figure 2 The overall structure schematic diagram of the screen mixing mechanism in the mixing device provided by the application is shown in the figure.

[0025] Figure 3 The cross-sectional view of the screen mixing mechanism in the mixing device provided by the application is shown in the figure.

[0026] Figure 4 The cross-sectional view of the mixing device provided by the application is shown in the figure.

[0027] Figure 5 The structure schematic diagram of the vibration rod and the lever cooperation in the mixing device provided by the application is shown in the figure.

[0028] Among them,

[0029] 110-first mixing container; 120-second mixing container; 130-lifting platform; 140-electric push rod;

[0030] 200-screen mixing mechanism; 210-screen assembly; 211-first screen; 212-second screen; 220-annular guide plate; 230-vibration assembly; 231-vibration motor; 232-vibration rod; 241-driving motor; 242-lever; 243-first contact point; 244-second contact point; 245-adjusting rod; 246-long slot. DETAILED DESCRIPTION

[0031] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all the embodiments of the present application. Based on the embodiments of the present application, all the other embodiments obtained by a person of ordinary skill in the art without creative work are within the scope of protection of the present application.

[0032] It should be noted that all the direction indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present application are only used to explain the relative position relationship, movement condition, etc. between components in a certain posture (as shown in the drawings), and if the certain posture changes, the direction indications also change accordingly.

[0033] In addition, the descriptions involving “first”, “second” and the like in the present application are only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features defined as “first” and “second” can explicitly or implicitly include at least one of the features. In addition, the technical solutions of various embodiments can be combined with each other, but it must be based on the fact that a person of ordinary skill in the art can realize it, and when the combination of technical solutions contradicts each other or cannot be realized, it should be considered that the combination of technical solutions does not exist, and is also not within the scope of protection claimed by the present application.

[0034] The embodiments of the present application provide a coal sample mixing device for coal quality testing, which solves the technical problem of poor mixing effect in the mixing process of coal powder in the prior art.

[0035] The technical solutions in the embodiments of the present application are as follows to solve the above technical problems:

[0036] As shown in Figures 1-3 The present application provides a coal sample mixing device for coal quality testing, which comprises:

[0037] A first mixing container 110 for containing coal powder, the coal powder is poured into the first mixing container 110 from the upper port.

[0038] A screen mixing mechanism 200 is arranged in the first mixing container 110 and used for mixing the coal powder.

[0039] By arranging the screen mixing mechanism 200 in the first mixing container 110, the screen mixing mechanism 200 is used to mix the coal powder, and the coal powder can be scattered when falling on the screen of the screen mixing mechanism 200, so that the coal powder can be more fully mixed, and the mixing effect is improved.

[0040] For better understanding of the above technical solutions, the above technical solutions will be described in detail below in combination with the drawings of the specification and specific embodiments.

[0041] Preferably, as shown in Figure 2 , Figure 3 The screen mixing mechanism 200 includes a screen assembly 210 and an annular guide plate 220, both of which are fixedly arranged in the first mixing container 110. The annular guide plate 220 is arranged downwardly inclined, and is located above the screen assembly 210.

[0042] The projection width of the annular guide plate 220 is one-fifth to one-half of the projection radius of the screen assembly 210.

[0043] During the process of pouring the pulverized coal into the first mixing container 110, the annular guide plate 220 guides the pulverized coal poured on the edge to prevent the pulverized coal from being poured on the edge of the screen mixing mechanism 200, so that the pulverized coal can be fully mixed on the screen mixing mechanism 200.

[0044] Preferably, as shown in Figure 2 , Figure 3 The screen assembly 210 includes a first screen 211 and a second screen 212, both of which are fixedly arranged inside the first mixing container 110. The first screen 211 is located above the second screen 212.

[0045] Specifically, the mesh number of the first screen 211 is less than that of the second screen 212; the first screen 211 is conical, and the second screen 212 is planar.

[0046] The pulverized coal is poured on the first screen 211. Since the first screen 211 is conical, preferably, the tip of the first screen 211 is arranged towards the second screen 212. The pulverized coal falls from the annular guide plate 220 or directly into the first screen 211. Since the inner wall of the first screen 211 is inclined, the pulverized coal has a tendency to slide down from the first screen 211. The pulverized coal slides down from the first screen 211 and passes through the first screen 211 at the same time, which mixes the pulverized coal for the first time. After the pulverized coal passes through the first screen 211, it falls onto the second screen 212. The pulverized coal passes through the second screen for the second time, which mixes the pulverized coal for the second time. The pulverized coal is mixed more fully through the process of passing through the two screens, and the mixing effect is better.

[0047] Further, as shown in Figures 1-5As shown, the screen mixing mechanism 200 further comprises a vibration assembly 230, the vibration assembly 230 comprises a vibration motor 231 and a vibration rod 232, the vibration motor 231 is located outside the first mixing container 110, the vibration rod 232 is connected with the output end of the vibration motor 231, and the vibration rod 232 is operable to transmit vibration to the first screen 211 and the second screen 212.

[0048] Specifically, as shown in the drawings, Figure 1 , Figure 2 , Figure 3 , Figure 5 As shown, the screen mixing mechanism 200 further comprises a driving motor 241, a lever 242, a first contact point 243 and a second contact point 244, the driving motor 241 is an angular rotation motor in this embodiment, the first contact point 243 and the second contact point 244 are made of metal, specifically stainless steel, the lever 242 passes through the first mixing container 110 and is located between the first screen 211 and the second screen 212, a through hole is formed on the first mixing container 110, the lever 242 passes through the through hole and is rotationally connected with the first mixing container 110, the first contact point 243 is fixedly arranged at one end of the lever 242 extending into the first mixing container 110, the first contact point 243 is two and is arranged corresponding to the first screen 211 and the second screen 212, the second contact point 244 is fixedly arranged on the first screen 211 and the second screen 212 corresponding to the first contact point 243, the output shaft of the driving motor 241 is parallel to the rotation shaft of the lever 242, the output shaft of the driving motor 241 is fixedly provided with an adjusting rod 245, one end of the lever 242 located outside the first mixing container 110 is provided with a long hole 246, the adjusting rod 245 is connected with the long hole 246 through a pulley, and the vibration rod 232 is connected with the lever 242.

[0049] It should be noted that the vibration motor 231 and the driving motor 241 are fixed on the outside of the first mixing container 110 through a support, and how the vibration motor 231 and the driving motor 241 are fixed through the support is a prior art, which will not be described here, and how the vibration motor 231 and the driving motor 241 are fixed through the support is not shown in the drawings.

[0050] When the coal powder passes through the screen mixing mechanism 200, the driving motor 241 periodically reverses at a certain angle, the driving motor 241 drives the adjusting rod 245 to rotate, and then the adjusting rod 245 drives the lever 242 to swing on the first mixing container 110, in the process of the lever 242 swinging up and down, the first contact point 243 will periodically collide with the second contact point 244 on the first screen 211 and the second screen 212, the vibration of the vibration motor 231 is transmitted to the lever 242 through the vibration rod 232, and finally transmitted to the first screen 211 and the second screen 212, so that the coal powder on the first screen 211 and the second screen 212 is mixed more uniformly after being vibrated, and can pass through the first screen 211 and the second screen 212 completely, realizing uniform mixing.

[0051] Further, as shown in Figure 1 、 Figure 4 The mixing device further comprises a second mixing container 120, and the first mixing container 110 is arranged above the second mixing container 120 through a support, the support does not belong to the design points of the application, and the specific structure of the support is not shown in the figure.

[0052] The second mixing container 120 is located below the first mixing container 110, the diameter of the second mixing container 120 is greater than that of the first mixing container 110, and a lifting platform 130 is arranged below the second mixing container 120, and an electric push rod 140 is fixedly arranged at the lower end of the lifting platform 130.

[0053] First, the electric push rod 140 lifts the lifting platform 130, so that the second mixing container 120 is lifted, the coal powder passing through the second screen 212 falls into the second mixing container 120, the falling height of the coal powder is reduced, and then the impact force of the coal powder is reduced, so that the coal powder falls more uniformly into the second mixing container 120.

[0054] Although the preferred embodiments of the present application have been described, those skilled in the art can make further changes and modifications to the embodiments once they know the basic inventive concept. Therefore, the appended claims are intended to be interpreted as including all changes and modifications falling within the scope of the present application.

[0055] Obviously, those skilled in the art can make various modifications and variations to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims

1. A coal sample mixing device for coal quality testing, characterized in that, The mixing device includes: The first mixing container is used to hold pulverized coal. A screen mixing mechanism is disposed in the first mixing container and is used to screen and mix coal powder; The screen mixing mechanism includes a screen assembly and an annular guide plate. Both the screen assembly and the annular guide plate are fixedly disposed in the first mixing container. The annular guide plate is inclined downward and is located above the screen assembly. The screen assembly includes a first screen and a second screen. Both the first screen and the second screen are fixedly disposed inside the first mixing container, with the first screen located above the second screen. The first screen is conical, and the second screen is planar; The screen mixing mechanism further includes a vibration assembly, which includes a vibration motor and a vibration rod. The vibration motor is located outside the first mixing container, and the vibration rod is connected to the output end of the vibration motor. The vibration rod can operably transmit vibration to the first screen and the second screen. The screen mixing mechanism further includes a drive motor, a lever, a first contact point, and a second contact point. The lever passes through the first mixing container and is located between the first screen and the second screen. The lever is rotatably connected to the first mixing container. The first contact point is fixedly located at one end of the lever that extends into the first mixing container. There are two first contact points, corresponding to the first and second screens. A second contact point is fixedly located on both the first and second screens at the position corresponding to the first contact point. The output shaft of the drive motor is parallel to the rotation shaft of the lever. An adjusting rod is fixedly installed on the output shaft of the drive motor. An elongated hole is opened at one end of the lever located outside the first mixing container. The adjusting rod is connected to the elongated hole through a pulley. The vibrating rod is connected to the lever.

2. The coal sample mixing device for coal quality testing as described in claim 1, characterized in that, The projected width of the annular guide plate is one-fifth to two-fifths of the projected radius of the screen assembly.

3. The coal sample mixing device for coal quality testing as described in claim 1, characterized in that, The mesh count of the first screen is smaller than that of the second screen.

4. The coal sample mixing device for coal quality testing as described in claim 1, characterized in that, The mixing device further includes a second mixing container, and the first mixing container is mounted above the second mixing container via a support.

5. The coal sample mixing device for coal quality testing as described in claim 4, characterized in that, The second mixing container is located below the first mixing container. The diameter of the second mixing container is larger than that of the first mixing container. A lifting platform is provided below the second mixing container, and an electric push rod is fixedly provided at the lower end of the lifting platform.

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