Coal sample drying machine

Abstract

A coal sample drying machine comprises a box body, drawers are installed in two drawer installation openings in the front side face of the box body through drawer sliding rails respectively, the upper, lower, left and right side edges of front panels of the drawers extend towards the outer sides of the drawer installation openings, and the upper, lower, left and right side edges, corresponding to the front side face of the box body, of the front panels are provided with a circle of sealing rubber strips; a drawer locking mechanism is arranged between the drawer and the front side surface; the left side face and the right side face of the box body are each provided with a fan installation opening, electric heating fans are installed at the fan installation openings, and ventilation duct mechanisms extending to the positions above and below the two drawers from air outlets of the electric heating fans are arranged in the box body. A rear partition plate is arranged in the box body and on the rear sides of the drawers, an air exhaust cavity is formed between the rear partition plate and the rear side face of the box body, the rear partition plate is provided with an air exhaust opening communicated with the air exhaust cavity, the air exhaust opening is located between the upper drawer and the lower drawer, the rear side face of the box body is provided with an exhaust fan installation opening, and an exhaust fan is installed at the exhaust fan installation opening. The drying device is high in drying efficiency, convenient to use and higher in safety.

Description

Technical Field

[0001] This utility model specifically relates to a coal sample dryer, used for drying coal samples during the testing process. Background Technology

[0002] In the process of testing and determining the "total moisture" of coal, the submitted coal samples need to undergo a series of pretreatment steps, including drying, crushing, mixing, and fractionation. Only after these pretreatment steps can the samples be used for subsequent experiments. These pretreatment steps are collectively referred to as "sample preparation." The coal samples submitted by customers are generally fragmented, moist coal samples of uneven size, requiring initial drying. After drying, the coal samples are cooled in the laboratory before proceeding to the next step of crushing.

[0003] Most existing laboratory drying devices consist of a chamber and a hinged door connected to the front of the chamber. A tray containing coal samples is placed inside the chamber, the door is closed, and after drying, the tray is removed and placed on a test bench to cool before further processing. However, existing laboratory drying devices are often time-consuming and inefficient in drying coal samples, and operators need to remove the trays after drying, posing a risk of burns. Currently, there is no dedicated coal sample drying device for laboratory use; therefore, there is an urgent need for a coal sample dryer that is highly efficient and easy to use. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a coal sample dryer with high drying efficiency and ease of use.

[0005] The purpose of this utility model is achieved through the following technical solution: a coal sample dryer, comprising a housing, wherein the front side of the housing is provided with two square drawer mounting openings, one above the other, and drawers are respectively mounted in these two mounting openings via drawer slides. Each drawer consists of a front panel, a handle located at the front end of the front panel, and a wire mesh drawer body fixedly connected to the rear side of the front panel. The upper, lower, left, and right sides of the front panel extend outwards from the drawer mounting openings, and a sealing rubber strip is provided around the upper, lower, left, and right sides of the front panel corresponding to the front side of the housing; a space is provided between the drawer and the front side. The cabinet is equipped with a drawer locking mechanism; fan mounting ports are provided on both the left and right sides of the cabinet, and electric heating fans are installed in the fan mounting ports; ventilation ducts extending from the air outlets of the electric heating fans to the top and bottom of the two drawers are provided inside the cabinet; a rear partition is provided on the rear side of each drawer inside the cabinet, forming an exhaust chamber between the rear partition and the rear side of the cabinet; an exhaust port communicating with the exhaust chamber is provided on the rear partition, and the exhaust port is located between the upper and lower drawers; an exhaust fan mounting port is provided on the rear side of the cabinet, and an exhaust fan is installed in the exhaust fan mounting port.

[0006] The ventilation duct mechanism includes an air inlet cavity, a top air inlet cavity, a top air distribution mechanism, a bottom air inlet cavity, and a bottom air distribution mechanism. Inside the cabinet, two side partitions are respectively provided on the left and right sides of the drawer. The top air distribution mechanism is located between the top of these two side partitions. A middle partition is provided between the top center of the top air distribution mechanism and the top surface of the cabinet, dividing the cavity between the top air distribution mechanism and the top surface of the cabinet into two top air inlet cavities. A bottom partition is located between the two side partitions. The bottom air intake mechanism has a middle partition between the bottom center of the bottom surface of the bottom air intake mechanism and the bottom surface of the cabinet. The middle partition divides the cavity between the bottom air intake mechanism and the bottom surface of the cabinet into two bottom air intake cavities, namely the left and right. The top air intake mechanism and the bottom air intake mechanism are located above and below the drawer, respectively. The left and right sides of the cabinet form two air intake cavities between the left and right side partitions, respectively. The air intake cavities are connected to the corresponding top air intake cavity and the bottom air intake cavity.

[0007] The drawer locking mechanism includes a switch hole in the middle of the front panel, a switch rod in the switch hole, a crossbar on the rear side of the front panel, two vertical bars on the left and right ends of the crossbar, a first wedge head formed at the rear end of the vertical bars, a support plate at the lower end of the vertical bars, a mounting base fixedly set on the rear side of the front panel, a transverse through-hole on the mounting base, and a pin passing through the through-hole. The rear end of the switch rod is connected to the crossbar by a fixing screw. The support plate has an inner limit strip and an outer limit strip on the left and right sides of the vertical bars, respectively. The rear end of the pin has a screw hole to which a connector is screwed. The rear end of the connector has a retaining edge located outside the pin hole. The front part of the pin has a protruding edge. A return spring is sleeved between the protruding edge and the mounting base. The front end of the pin has a second wedge head formed corresponding to the first wedge head.

[0008] The switch hole is composed of a circular hole and a strip-shaped hole at the upper end of the circular hole. The switch lever is composed of a handle, a thin section corresponding to the strip-shaped hole, and a thick section corresponding to the circular hole. The thin section is located between the handle and the thick section. A spring is sleeved on the outside of the thin section and the thick section of the switch lever. The spring is located between the handle and the front panel. The thick section passes through the circular hole. When the drawer locking mechanism is in the open state, the thin section is located in the strip-shaped hole.

[0009] An upper limit plate is provided at the rear end of the front panel. The upper limit plate is located above the crossbar. When the switch rod is located at the top of the strip hole of the switch hole, the crossbar contacts the upper limit plate.

[0010] The top air distribution mechanism includes a first air distribution plate and a second air distribution plate. The first air distribution plate is located above the second air distribution plate. The first air distribution plate is evenly provided with a plurality of air inlet holes, and the second air distribution plate is evenly provided with a plurality of air distribution holes.

[0011] The bottom air distribution mechanism includes a first air distribution plate and a second air distribution plate. The second air distribution plate is located above the first air distribution plate. The first air distribution plate is evenly provided with a plurality of air inlet holes, and the second air distribution plate is evenly provided with a plurality of air distribution holes.

[0012] The bottom of the box is equipped with support legs.

[0013] The beneficial effects of this utility model are: This utility model is a coal sample dryer specifically designed for drying coal samples in the laboratory. It has high drying efficiency. After the coal sample is dried, the drawer locking mechanism can be opened, the drawer can be pulled out to cool the coal sample, and then the tray can be removed. It is convenient to use and has higher safety. Attached Figure Description

[0014] Figure 1 This is a front structural diagram of the present invention;

[0015] Figure 2 This is a side view of the structure of this utility model;

[0016] Figure 3 This is a schematic diagram of the drawer locking mechanism;

[0017] Figure 4 yes Figure 3 An enlarged structural diagram of part A;

[0018] Figure 5 This is a schematic diagram of the switch lever.

[0019] Figure 6 This is a schematic diagram of the switch hole structure;

[0020] Figure 7 This is a structural diagram showing how the first wedge head and the second wedge head engage when the drawer is closed.

[0021] In the diagram: 1-Box body; 2-Feet; 3-Drawer; 4-Switch hole; 5-Drawer slide; 6-Front panel; 7-Sealing rubber strip; 8-Handle; 9-Electric heater; 10-Air inlet cavity; 11-Middle partition; 12-First air distribution panel; 13-Air inlet hole; 14-Second air distribution panel; 15-Air distribution hole; 16-Air distribution cavity; 17-Side partition; 18-Rear partition; 19-Exhaust vent; 20-Exhaust cavity; 21-Exhaust fan; 22-Drawer locking mechanism; 3-Switch lever; 24-Thick section; 25-Thin section; 26-Handle; 27-Spring; 28-Fixing screw; 29-Horizontal bar; 30-Upper limit plate; 31-Support plate; 32-Inner limit bar; 33-Outer limit bar; 34-Vertical bar; 35-First wedge head; 36-Mounting base; 37-Pin; 38-Connector; 39-Internal threaded hole; 40-Second wedge head; 41-Reset spring; 42-Round hole; 43-Strip hole; 44-LCD display screen. Detailed Implementation

[0022] The present invention will now be described in detail with reference to the accompanying drawings.

[0023] like Figure 1 , Figure 2 As shown, a coal sample dryer includes a housing 1. The front side of the housing 1 has two square drawer mounting openings, one above the other. Drawers 3 are mounted in these openings via drawer slides 5. Each drawer 3 consists of a front panel 6, a handle 8 located at the front end of the front panel 6, and a wire mesh drawer body fixedly connected to the rear side of the front panel 6. The upper, lower, left, and right sides of the front panel 6 extend outwards from the drawer mounting openings. A sealing rubber strip 7 is provided around the upper, lower, left, and right sides of the front panel 6 corresponding to the front side of the housing 1. A drawer locking mechanism 22 is provided between the drawer 3 and the front side. The housing 1... Both sides of the box have fan mounting ports, and electric heating fans 9 are installed in the fan mounting ports. The box 1 has ventilation ducts extending from the air outlet of the electric heating fan 9 to the top and bottom of the two drawers 3 respectively. Inside the box 1, a rear partition 18 is provided on the rear side of the drawer 3. The rear partition 18 and the rear side of the box 1 form an exhaust cavity 20. The rear partition 18 has an exhaust port 19 that communicates with the exhaust cavity 20. The exhaust port 19 is located between the upper and lower drawers 3. The rear side of the box 1 has an exhaust fan mounting port, and an exhaust fan 21 is installed in the exhaust fan mounting port.

[0024] During operation, the operator weighs the damp coal sample, records the weight, and pours the sample into a coal sample basket (or a tray with a sieve-like bottom). The sample is spread evenly in the basket. Drawer 3 is opened, and the basket containing the sample is placed inside the drawer body. Drawer 3 is then closed, and the drawer locking mechanism 22 locks it in place. The front panel 6 is sealed to the front of the housing 1 by sealing rubber strips 7. The electric hot air blower 9 and exhaust fan 21 are turned on, and the coal sample dryer begins operation. Air from outside the housing 1 is heated by the electric hot air blower 9 and enters the housing 1. It then enters the coal sample basket from above and below the two drawers 3 through the ventilation duct mechanism. After passing through the sample, the air is exhausted into the exhaust chamber 20 through the exhaust port 19 between the two drawers 3, and finally extracted from the housing 1 by the exhaust fan 21. This invention can dry coal samples in a short time with high drying efficiency. After the coal sample is dried, open the drawer locking mechanism 22, pull out the drawer 3, let the coal sample cool, and then take out the tray. It is convenient to use and safer.

[0025] See Figure 1 , Figure 2 The ventilation duct mechanism includes an air inlet chamber 10, a top air inlet chamber, a top air distribution mechanism, a bottom air inlet chamber, and a bottom air distribution mechanism. Inside the housing 1, drawers 3 have two side partitions 17 on their left and right sides respectively. A top air distribution mechanism is located between the top of these two side partitions 17. A middle partition 11 is located between the top center of the top air distribution mechanism and the top surface of the housing 1. This middle partition 11 divides the cavity between the top air distribution mechanism and the top surface of the housing 1 into two top air inlet chambers, left and right. The two side partitions 17... A bottom air supply mechanism is provided at the bottom. A middle partition 11 is provided between the middle of the bottom surface of the bottom air supply mechanism and the bottom surface of the box 1. The middle partition 11 divides the cavity between the bottom air supply mechanism and the bottom surface of the box 1 into two bottom air inlet cavities, left and right. The top air supply mechanism and the bottom air supply mechanism are located above and below the drawer 3, respectively. The left and right sides of the box 1 form two left and right air inlet cavities 10 between the left and right side partitions 17, respectively. The air inlet cavities 10 are connected to the corresponding top air inlet cavity and bottom air inlet cavity. During operation, hot air heated by the electric hot air blower 9 enters the air inlet cavity 10, and then enters the top air supply mechanism and the bottom air supply mechanism through the top air inlet cavity and the bottom air inlet cavity, respectively. Afterwards, it enters the coal sample basket from the top and bottom of the two drawers 3 to dry the coal sample.

[0026] like Figure 3 , Figure 4As shown, the drawer locking mechanism 22 includes a switch hole 4 located in the middle of the front panel 6, a switch lever 23 located in the switch hole 4, a crossbar 29 located on the rear side of the front panel 6, two vertical bars 34 located at the left and right ends of the crossbar 29, a first wedge-shaped head 35 formed at the rear end of the vertical bar 34, a support plate 31 located at the lower end of the vertical bar 34, a mounting base 36 fixedly located on the rear side of the front panel 6, a transverse through-hole pin hole located on the mounting base 36, and a pin 37 passing through the pin hole. The rear end of the switch lever 23 is fixed by a fixed Screw 28 is connected to crossbar 29. The support plate 31 is provided with inner limit strip 32 and outer limit strip 33 on the left and right sides of the longitudinal bar 34, respectively. The rear end of the pin 37 is provided with an internal threaded hole 39, and a connector 38 is screwed into the internal threaded hole 39. The rear end of the connector 38 is provided with a retaining edge, which is located outside the pin hole and serves as a limit. The front part of the pin 37 is provided with a protruding edge, and a return spring 41 is sleeved between the protruding edge and the mounting base 36. The front end of the pin 37 is formed with a second wedge head 40 corresponding to the first wedge head 35.

[0027] When closing drawer 3, see Figure 7 The inclined surface of the first wedge head 35 contacts the inclined surface of the second wedge head 40. During the movement of the first wedge head 35 into the housing 1, it pushes the second wedge head 40 laterally through the inclined surface. The pin 37 can move left and right within the pin hole, and a reset force is applied by the reset spring 41. When the first wedge head 35 continues to move inward, causing the inclined surface of the first wedge head 35 to disengage from the inclined surface of the second wedge head 40, see [link to relevant documentation]. Figure 4 The straight surface of the first wedge head 35 and the straight surface of the second wedge head 40 come into contact with each other, and the drawer locking mechanism 22 locks.

[0028] like Figure 3 , Figure 5 , Figure 6 As shown, the switch hole 4 is composed of a circular hole 42 and a strip-shaped hole 43 located at the upper end of the circular hole 42. The switch lever 23 includes a handle 26, a thin section 25 corresponding to the strip-shaped hole 43, and a thick section 24 corresponding to the circular hole 42. The thin section 25 is located between the handle 26 and the thick section 24. A spring 27 is sleeved on the outside of the thin section 25 and the thick section 24 of the switch lever 23. The spring 27 is located between the handle 26 and the front panel 6. The thick section 24 passes through the circular hole 42. When the drawer locking mechanism 22 is in the open state, the thin section 25 is located in the strip-shaped hole 43.

[0029] When the operator pushes the switch lever 23 inward by holding the handle 26, the thin section 25 is positioned inside the switch hole 4. Then, by pulling the handle 26 upward, the thin section 25 enters the strip-shaped hole 43. Simultaneously, the switch lever 23, through the horizontal bar 29 and the vertical bar 34, moves the first wedge head 35 upward, disengaging it from the second wedge head 40 and opening the drawer locking mechanism 22. At this point, the drawer 3 can be pulled open. As the drawer 3 is pulled outward, the switch lever 23 moves downward, resetting it. The thicker section 24 is now positioned inside the round hole 42. When closing the drawer 3, the first wedge head 35 and the second wedge head 40 can re-lock the drawer 3.

[0030] See Figure 3 The front panel 6 has an upper limit plate 30 at its rear end. The upper limit plate 30 is located above the crossbar 29. When the switch rod 23 is located at the top of the strip hole 43 of the switch hole 4, the crossbar 29 contacts the upper limit plate 30.

[0031] See Figure 1 , Figure 2 The top air distribution mechanism includes a first air distribution plate 12 and a second air distribution plate 14. The first air distribution plate 12 is located above the second air distribution plate 14, and an air distribution cavity 16 is formed between the first air distribution plate 12 and the second air distribution plate 14. A plurality of air inlet holes 13 are evenly arranged on the first air distribution plate 12, and a plurality of air distribution holes 15 are evenly arranged on the second air distribution plate 14. The air distribution holes 15 allow hot air to enter the drawer 3 more evenly.

[0032] The bottom air distribution mechanism includes a first air distribution plate 12 and a second air distribution plate 14. The second air distribution plate 14 is located above the first air distribution plate 12. An air distribution cavity 16 is formed between the first air distribution plate 12 and the second air distribution plate 14. A plurality of air inlet holes 13 are evenly arranged on the first air distribution plate 12, and a plurality of air distribution holes 15 are evenly arranged on the second air distribution plate 14.

[0033] An LCD screen 44 is installed on the front side of the enclosure 1, and a temperature sensor is installed inside the top air inlet cavity. Both the LCD screen 44 and the temperature sensor are connected to the control circuit. The LCD screen 44 displays the internal temperature of the enclosure 1. Support legs 2 are installed at the bottom of the enclosure 1.

[0034] Finally, it should be noted that the above content is only used to illustrate the technical solution of this utility model, and is not intended to limit the scope of protection of this utility model. Simple modifications or equivalent substitutions made by those skilled in the art to the technical solution of this utility model do not depart from the essence and scope of the technical solution of this utility model.

Claims

1. A coal sample dryer, comprising a housing, characterized in that: The front side of the box has two square drawer mounting openings, one above the other. Drawers are mounted in these openings via drawer slides. Each drawer consists of a front panel, a handle at the front of the front panel, and a wire mesh drawer body fixedly connected to the rear of the front panel. The top, bottom, left, and right sides of the front panel extend outwards from the drawer mounting openings. A sealing rubber strip is provided around the top, bottom, left, and right sides of the front panel corresponding to the front side of the box. A drawer locking mechanism is provided between the drawer and the front side. The left and right sides of the box... Each side is provided with a fan mounting port, and an electric heating fan is installed in the fan mounting port. The housing is provided with a ventilation duct mechanism that extends from the air outlet of the electric heating fan to the top and bottom of the two drawers respectively. In the housing, a rear partition is provided on the rear side of each drawer, and an exhaust chamber is formed between the rear partition and the rear side of the housing. The rear partition is provided with an exhaust port that communicates with the exhaust chamber. The exhaust port is located between the upper and lower drawers. An exhaust fan mounting port is provided on the rear side of the housing, and an exhaust fan is installed in the exhaust fan mounting port.

2. The coal sample dryer according to claim 1, characterized in that: The ventilation duct mechanism includes an air inlet cavity, a top air inlet cavity, a top air distribution mechanism, a bottom air inlet cavity, and a bottom air distribution mechanism. Inside the cabinet, two side partitions are respectively provided on the left and right sides of the drawer. The top air distribution mechanism is located between the top of these two side partitions. A middle partition is provided between the top center of the top air distribution mechanism and the top surface of the cabinet, dividing the cavity between the top air distribution mechanism and the top surface of the cabinet into two top air inlet cavities. A bottom partition is located between the two side partitions. The bottom air intake mechanism has a middle partition between the bottom center of the bottom surface of the bottom air intake mechanism and the bottom surface of the cabinet. The middle partition divides the cavity between the bottom air intake mechanism and the bottom surface of the cabinet into two bottom air intake cavities, namely the left and right. The top air intake mechanism and the bottom air intake mechanism are located above and below the drawer, respectively. The left and right sides of the cabinet form two air intake cavities between the left and right side partitions, respectively. The air intake cavities are connected to the corresponding top air intake cavity and the bottom air intake cavity.

3. A coal sample dryer according to claim 1, characterized in that: The drawer locking mechanism includes a switch hole in the middle of the front panel, a switch rod in the switch hole, a crossbar on the rear side of the front panel, two vertical bars on the left and right ends of the crossbar, a first wedge head formed at the rear end of the vertical bars, a support plate at the lower end of the vertical bars, a mounting base fixedly set on the rear side of the front panel, a transverse through-hole on the mounting base, and a pin passing through the through-hole. The rear end of the switch rod is connected to the crossbar by a fixing screw. The support plate has an inner limit strip and an outer limit strip on the left and right sides of the vertical bars, respectively. The rear end of the pin has a screw hole to which a connector is screwed. The rear end of the connector has a retaining edge located outside the pin hole. The front part of the pin has a protruding edge. A return spring is sleeved between the protruding edge and the mounting base. The front end of the pin has a second wedge head formed corresponding to the first wedge head.

4. A coal sample dryer according to claim 3, characterized in that: The switch hole is composed of a circular hole and a strip-shaped hole at the upper end of the circular hole. The switch lever is composed of a handle, a thin section corresponding to the strip-shaped hole, and a thick section corresponding to the circular hole. The thin section is located between the handle and the thick section. A spring is sleeved on the outside of the thin section and the thick section of the switch lever. The spring is located between the handle and the front panel. The thick section passes through the circular hole. When the drawer locking mechanism is in the open state, the thin section is located in the strip-shaped hole.

5. A coal sample dryer according to claim 4, characterized in that: An upper limit plate is provided at the rear end of the front panel. The upper limit plate is located above the crossbar. When the switch rod is located at the top of the strip hole of the switch hole, the crossbar contacts the upper limit plate.

6. A coal sample dryer according to claim 2, characterized in that: The top air distribution mechanism includes a first air distribution plate and a second air distribution plate. The first air distribution plate is located above the second air distribution plate. The first air distribution plate is evenly provided with a plurality of air inlet holes, and the second air distribution plate is evenly provided with a plurality of air distribution holes.

7. A coal sample dryer according to claim 2, characterized in that: The bottom air distribution mechanism includes a first air distribution plate and a second air distribution plate. The second air distribution plate is located above the first air distribution plate. The first air distribution plate is evenly provided with a plurality of air inlet holes, and the second air distribution plate is evenly provided with a plurality of air distribution holes.

8. A coal sample dryer according to claim 2, characterized in that: The bottom of the box is equipped with support legs.

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