Novel muffle furnace for measuring ash content of coal sample

Abstract

The utility model discloses a novel muffle furnace for coal sample ash content determination, which comprises a furnace body, a window is arranged at the upper position of the front side of the furnace body, a hearth is arranged on the inner side of the window, a fixing groove is arranged at the lower position of the front side of the furnace body, and a furnace door is slidably connected to the inner side of the fixing groove. A rotating rod is rotationally installed below the inner side of the fixing groove, a driving motor is installed below the side face of the furnace body, threaded lead screws are rotationally installed on the two sides of the bottom end of the fixing groove correspondingly, worm wheels fixedly sleeve the bottom ends of the outer sides of the threaded lead screws, and worms are installed on the two sides of the exterior of the rotating rod correspondingly; two threaded rings are fixedly connected to the lower portion of the inner side face of the furnace door, and the two threaded rings are arranged on the outer sides of the two threaded lead screws in a sleeved mode through threads respectively. Therefore, scalding accidents caused by high-temperature gas in the hearth when the furnace door is overheated or manually opened are avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of coal sample detection, in particular to a novel muffle furnace used for measuring ash content of coal samples. Background Art

[0002] Muffle furnace is a kind of equipment commonly used in coal analysis. It can be used to determine the ash content of coal samples. The ash content is usually determined by slow ash method or fast ash method.

[0003] Most of the existing muffle furnace door structures are opened by rotating, and need to be opened manually by holding the door handle. However, the working temperature of the muffle furnace is relatively high, which may sometimes cause burns to the human body.

[0004] Therefore, those skilled in the art provide a new muffle furnace for measuring the ash content of coal samples to solve the problems raised in the above background technology. Utility Model Content

[0005] The utility model aims to solve the shortcomings in the prior art and proposes a new muffle furnace for measuring the ash content of coal samples.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A new type of muffle furnace for measuring ash content of coal samples comprises a furnace body, a window is provided at the upper front side of the furnace body, a furnace chamber is arranged inside the window, a fixed groove is provided at the lower front side of the furnace body, and a sealing plate is provided at the opening of the fixed groove, a furnace door is slidably connected to the inner side of the fixed groove, a rotating rod is rotatably installed at the lower inner side of the fixed groove, a driving motor is installed at the lower side of the furnace body, and one end of the driving motor output shaft is fixedly connected to the end of the rotating rod, threaded screws are rotatably installed on both sides of the bottom end of the fixed groove, a worm gear is fixedly sleeved at the bottom end of the outer side of the threaded screw, worms are installed on both sides of the outer side of the rotating rod, and the two worms are respectively meshed with two worm gears, two threaded rings are fixedly connected to the lower inner side of the furnace door, and the two threaded rings are respectively sleeved on the outer sides of the two threaded screws.

[0008] Preferably, the width of the furnace door is the same as the width of the window, an opening connected to the fixing groove is provided at the inner bottom end of the window, and the top end of the furnace door slides through the opening and is slidably connected to the inner side of the window.

[0009] Preferably, guide strips are installed on both sides of the inner wall of the window, and the bottom ends of the guide strips extend to the bottom ends of the inner sides of the fixing grooves. Guide slots are provided on both side edges of the furnace door, and the edges of the furnace door are slidably connected to the guide strips through the guide slots.

[0010] Preferably, a carrier plate is slidably mounted inside the furnace, a plurality of brackets are mounted on the top of the carrier plate, and a plurality of storage plates are mounted above the carrier plate through the plurality of brackets, and two ash dishes are placed between two adjacent storage plates.

[0011] Preferably, overlapping parts are provided on both sides of the top of the ash tray, and the overlapping parts on both sides are respectively overlapped on the tops of the storage plates on both sides, a plurality of positioning columns are installed on the tops of the storage plates, and positioning holes are opened on both sides of the bottom ends of the overlapping parts.

[0012] Preferably, sliders are installed at the rear ends of both sides of the carrier plate, sliding grooves are opened on both sides of the inner wall of the furnace, and the sliders are slidably connected to the inner sides of the sliding grooves.

[0013] Preferably, a U-shaped groove is provided at one end of the slider, and notches are provided at the upper and lower positions of both corners of the rear end of the carrier plate, and one end of the slider is inserted into the notch through the U-shaped groove, and threaded holes are provided at the corners of the slider and the carrier plate, and are fixedly connected by screws.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] The technical solution designed by the utility model, through the design of the furnace door that can be lifted and opened and closed by automatic control, does not require the staff to manually open the furnace door, thereby preventing the furnace door from overheating or scalding accidents caused by high-temperature gas in the furnace when it is opened manually. At the same time, through the design of the carrier plate structure, the ash pan is suspended in the air so that the coal sample can be better heated. The carrier plate adopts a sliding design, which is convenient for placing and removing the ash pan and improving convenience. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more specifically and intuitively illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art are briefly introduced below.

[0017] Figure 1 It is a schematic diagram of the structure proposed by the utility model;

[0018] Figure 2 This is a schematic diagram of the furnace door installation structure proposed by the utility model;

[0019] Figure 3 It is a schematic diagram of the structure of the slideway provided by the utility model;

[0020] Figure 4 This is a schematic diagram of the threaded ring installation structure proposed by the utility model;

[0021] Figure 5 This is a schematic diagram of the ash tray installation structure proposed by the utility model;

[0022] Figure 6This is a schematic diagram of the installation structure of the storage plate proposed by the utility model.

[0023] In the figure: 1. furnace body; 2. window; 3. furnace chamber; 4. fixing groove; 5. sealing plate; 6. furnace door; 7. rotating rod; 8. driving motor; 9. worm; 10. threaded screw; 11. worm wheel; 12. threaded ring; 13. opening; 14. guide strip; 15. guide groove; 16. carrier plate; 17. bracket; 18. storage plate; 19. ash tray; 20. overlapping part; 21. positioning column; 22. positioning hole; 23. slider; 24. slide groove; 25. U-shaped groove; 26. missing groove. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0025] Reference Figure 1-6 A new type of muffle furnace for measuring ash content of coal samples comprises a furnace body 1, a window 2 is provided at the upper front side of the furnace body 1, a furnace chamber 3 is arranged inside the window 2, a fixed groove 4 is provided at the lower front side of the furnace body 1, and a sealing plate 5 is provided at the opening of the fixed groove 4, a furnace door 6 is slidably connected inside the fixed groove 4, a rotating rod 7 is rotatably installed at the lower inner side of the fixed groove 4, a driving motor 8 is installed at the lower side of the furnace body 1, and one end of the output shaft of the driving motor 8 is fixedly connected to the end of the rotating rod 7, threaded screws 10 are rotatably installed on both sides of the bottom end of the fixed groove 4, a worm gear 11 is fixedly sleeved at the bottom end of the outer side of the threaded screw 10, worms 9 are installed on both sides of the outer side of the rotating rod 7, and the two worms 9 are respectively meshed with the two worm gears 11, two threaded rings 12 are fixedly connected to the lower inner side of the furnace door 6, and the two threaded rings 12 are respectively sleeved on the outer sides of the two threaded screws 10;

[0026] The technical solution adopted above drives the rotating rod 7 to rotate by driving the motor 8, and the rotating rod 7 drives the two worms 9 to rotate. Since the two worms 9 are meshed with the worm wheels 11 on the two threaded screws 10, the two threaded screws 10 are driven to rotate through the transmission action. The rotation of the two threaded screws 10 will cause the furnace door 6 to slide in the vertical direction through the action of the threaded ring 12. By controlling the forward and reverse rotation of the driving motor 8, the furnace door 6 can be opened and closed at the front end of the furnace chamber 3. The furnace door 6 adopts an automatic lifting and opening and closing method to avoid direct contact between personnel and the furnace door 6, thereby causing scalding accidents, thereby improving safety.

[0027] The width of the furnace door 6 is the same as that of the window 2. An opening 13 communicating with the fixing groove 4 is provided at the bottom inner side of the window 2. The top end of the furnace door 6 slides through the opening 13 and is slidably connected to the inner side of the window 2.

[0028] In the technical solution adopted above, the furnace door 6 and the window 2 have the same width, which can ensure that they slide in close contact with the wall of the window 2 to ensure a certain degree of airtightness. The function of the opening 13 is to open up between the fixing groove 4 and the window 2 to facilitate the up and down opening and closing activities of the furnace door 6.

[0029] Guide strips 14 are installed on both sides of the inner wall of the window 2, and the bottom end of the guide strip 14 extends to the bottom end of the inner side of the fixing groove 4. Guide grooves 15 are opened on both sides of the furnace door 6, and the edges of the furnace door 6 are slidably connected with the guide strips 14 through the guide grooves 15;

[0030] The technical solution adopted above, the guide strip 14 and the guide groove 15 can make the furnace door 6 move up and down more stably, and at the same time improve the sealing between the furnace door 6 and the inner walls on both sides of the window 2.

[0031] A carrier plate 16 is slidably mounted inside the furnace 3, a plurality of brackets 17 are mounted on the top of the carrier plate 16, and a plurality of placement plates 18 are mounted above the carrier plate 16 through the plurality of brackets 17, and two ash trays 19 are placed between two adjacent placement plates 18;

[0032] The technical solution adopted above can place coal samples through the ash tray 19, so that they can be put into the furnace 3 for heating reaction. Through the design of structures such as the bracket 17 and the storage plate 18, the ash tray 19 can be suspended in the air so that the coal sample can be heated better. At the same time, multiple ash trays 19 can also be placed.

[0033] The top of the ash tray 19 is provided with overlapping parts 20 on both sides, and the overlapping parts 20 on both sides are overlapped on the top of the two side storage plates 18 respectively. The top of the storage plate 18 is equipped with a plurality of positioning columns 21, and the bottom of the overlapping parts 20 is provided with positioning holes 22 on both sides.

[0034] The technical solution adopted above sets overlapping parts 20 on both sides of the ash tray 19, and the positioning holes 22 on the overlapping parts 20 correspond to the positioning columns 21 on the storage plate 18, so as to facilitate the positioning and placement of the ash tray 19 on the storage plate 18 and prevent it from sliding.

[0035] Slide blocks 23 are installed at the rear ends of both sides of the carrier plate 16, and slide grooves 24 are opened on both sides of the inner wall of the furnace 3, and the slide blocks 23 are slidably connected to the inner sides of the slide grooves 24;

[0036] The technical solution adopted above sets sliders 23 on both sides of the carrier plate 16 so that it can slide outward in the furnace 3. The setting of the sliders 23 and the slide grooves 24 limits its movement direction and range. The carrier plate 16 slides outward, which facilitates the placement and removal of the ash tray 19 for placing the coal sample.

[0037] A U-shaped groove 25 is formed at one end of the slider 23, and notches 26 are formed at the upper and lower positions of both corners of the rear end of the carrier plate 16, and one end of the slider 23 is inserted into the notch 26 through the U-shaped groove 25. Threaded holes are formed at the corners of the slider 23 and the carrier plate 16, and are fixedly connected by screws.

[0038] The technical solution adopted above, the design of the corner structure on both sides of the rear end of the slider 23 and the carrier 16, facilitates the assembly of the slider 23 and the carrier 16, and fixes them by screws, so that when the carrier 16 or the slider 23 is damaged, it is convenient to replace it, and it is also convenient to clean the carrier 16.

[0039] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A new type of muffle furnace for measuring ash content of coal samples, comprising a furnace body (1), characterized in that: A window (2) is provided at the upper front side of the furnace body (1), a furnace chamber (3) is provided inside the window (2), a fixing groove (4) is provided at the lower front side of the furnace body (1), a sealing plate (5) is provided at the opening of the fixing groove (4), a furnace door (6) is slidably connected to the inner side of the fixing groove (4), a rotating rod (7) is rotatably installed at the lower inner side of the fixing groove (4), a driving motor (8) is installed at the lower side of the furnace body (1), and one end of the output shaft of the driving motor (8) is connected to the The end of the rotating rod (7) is fixedly connected, and threaded screws (10) are rotatably installed on both sides of the bottom end of the fixed groove (4), and a worm wheel (11) is fixedly sleeved on the outer bottom end of the threaded screw (10). Worms (9) are installed on both sides of the outside of the rotating rod (7), and the two worms (9) are respectively engaged with the two worm wheels (11). Two threaded rings (12) are fixedly connected to the lower inner side of the furnace door (6), and the two threaded rings (12) are respectively sleeved on the outer sides of the two threaded screws (10) through threads.

2. A novel muffle furnace for measuring ash content of coal samples according to claim 1, characterized in that: The width of the furnace door (6) is the same as that of the window (2); an opening (13) communicating with the fixing groove (4) is provided at the inner bottom end of the window (2); and the top end of the furnace door (6) slides through the opening (13) and is slidably connected to the inner side of the window (2).

3. A novel muffle furnace for measuring ash content of coal samples according to claim 2, characterized in that: Guide strips (14) are installed on both sides of the inner wall of the window (2), and the bottom end of the guide strip (14) extends to the bottom end of the inner side of the fixing groove (4). Guide grooves (15) are opened on both side edges of the furnace door (6), and the edges of the furnace door (6) are slidably connected to the guide strips (14) through the guide grooves (15).

4. A novel muffle furnace for measuring ash content of coal samples according to claim 1, characterized in that: A carrier plate (16) is slidably mounted on the inner side of the furnace (3), a plurality of brackets (17) are mounted on the top of the carrier plate (16), and a plurality of placement plates (18) are mounted above the carrier plate (16) via the plurality of brackets (17), and two ash trays (19) are placed between two adjacent placement plates (18).

5. A novel muffle furnace for measuring ash content of coal samples according to claim 4, characterized in that: The top of the ash tray (19) is provided with overlapping parts (20) on both sides, and the overlapping parts (20) on both sides are respectively overlapped on the top of the storage plates (18) on both sides. The top of the storage plates (18) is equipped with a plurality of positioning columns (21), and the bottom of the overlapping parts (20) is provided with positioning holes (22) on both sides.

6. A novel muffle furnace for measuring ash content of coal samples according to claim 4, characterized in that: Slide blocks (23) are installed at the rear ends of both sides of the carrier plate (16), and slide grooves (24) are opened on both sides of the inner wall of the furnace (3), and the slide blocks (23) are slidably connected to the inner sides of the slide grooves (24).

7. A novel muffle furnace for measuring ash content of coal samples according to claim 6, characterized in that: A U-shaped groove (25) is formed at one end of the slider (23), and notches (26) are formed at upper and lower positions of both corners of the rear end of the carrier plate (16), and one end of the slider (23) is inserted into the notch (26) through the U-shaped groove (25). Threaded holes are formed at the corners of the slider (23) and the carrier plate (16), and are fixedly connected by screws.

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