A combination adjustable spreader

Abstract

This invention discloses a combined adjustable material spreading device, comprising a housing, a telescopic adjustment mechanism, an angle adjustment mechanism, and a spreading plate. The housing is equipped with a sliding support and an adjusting support. The telescopic adjustment mechanism includes a handwheel, a nut, a first screw, a threaded sleeve, a thrust bearing, a Y-type connector, and a rotating shaft. The threaded sleeve is mounted on the adjusting support. The threaded sleeve, thrust bearing, handwheel, and nut are connected sequentially. The first screw is screwed into the threaded sleeve. The first screw, Y-type connector, and rotating shaft are connected sequentially, and rotating shaft is connected to a hole in the spreading plate. The angle adjustment mechanism includes a second handwheel, a second screw, a crossbar, a connecting rod, rotating shaft, and a nut. The second screw is screwed into the first screw. The second handwheel, second screw, crossbar, connecting rod, and rotating shaft are connected sequentially, and rotating shaft is connected to a hole in the spreading plate. This invention can adjust the telescopic length and angle of the spreading plate individually or in combination to meet the needs of different production conditions, offering high adjustment accuracy, reliability, and stability.

Description

Technical Field

[0001] This invention relates to a material spreading adjustment device, specifically a combined adjustment material spreading device. Background Technology

[0002] In the kiln tail preheater system, heat exchange between the airflow and the dispersed raw material mainly occurs in the rising pipe. The extent to which the raw material is dispersed by the spreading device affects the heated area of ​​the raw material, and thus directly affects the heat exchange efficiency of the system. The length of the spreading plate extending into the rising pipe and the angle of inclination of the spreading plate determine the spreading effect of the raw material.

[0003] Existing cement production line spreading devices mainly use fixed spreading plates, which cannot be adjusted after installation. Existing adjustable spreading devices offer limited adjustment options, mostly only allowing for adjustment of angle and extension length.

[0004] Chinese patent application CN202020685315.5 discloses a bidirectional adjustable material spreading device, which also includes a telescopic adjustment device and an angle adjustment device. When adjusting the angle, the output direction of the second screw 30 is almost perpendicular to the spreading plate 11. Due to the very large weight of the spreading plate 11, and the frictional resistance generated by the relative sliding of the T-shaped slider 32 and the compensation groove 311, angle adjustment is very difficult in practice. To prevent the telescopic adjustment device from jamming, the compensation groove 211 is provided. However, during extension adjustment, it cannot directly push the support plate 31 and the spreading plate 11, which may cause the adjustment function to fail due to the adhesion of the material. Initially, the extension direction of the compensation groove 311 is the same as the axial direction of the first screw 20 and the extension direction of the compensation groove 211. After the angles of the support plate 31 and the spreading plate 11 change, the compensation groove 311 and the compensation groove 211 are no longer parallel. If further extension and retraction adjustment is performed at this time, the angles of the support plate 31 and the spreading plate 11 will change passively and will no longer be accurate. The two first screws 20 and the two second screws 30 are set separately, requiring two people to adjust them simultaneously. In practice, it is difficult to achieve synchronization and operation. Summary of the Invention

[0005] Purpose of the invention: In order to overcome the shortcomings of the existing technology, the purpose of this invention is to provide a combined adjustment spreading device that is simple and convenient to operate on site, meets the needs of different production and debugging conditions, has good stability, and high adjustment accuracy.

[0006] Technical Solution: The present invention provides a combined adjustable spreading device, comprising a housing, a telescopic adjustment mechanism, an angle adjustment mechanism, and a spreading plate. The housing is equipped with a sliding support and an adjusting support. The telescopic adjustment mechanism includes a handwheel, a nut, a first screw, a threaded sleeve, a thrust bearing, a Y-type connector, and a rotating shaft. The threaded sleeve is mounted on the adjusting support. The threaded sleeve, thrust bearing, handwheel, and nut are sequentially connected to each other. The first screw is a hollow screw, and the first screw is helically engaged with the threaded sleeve. The first screw, Y-type connector, and rotating shaft are sequentially connected. The components are interconnected. The first rotating shaft is connected to the first hole on the spreading plate. Rotating the first handwheel can drive the spreading plate to move back and forth along the sliding groove of the sliding support. The angle adjustment mechanism includes a second handwheel, a second screw, a crossbar, a connecting rod, a second rotating shaft, and a second nut. The second screw is screwed to the first screw. The second handwheel, the second screw, the crossbar, the connecting rod, and the second rotating shaft are connected to each other in sequence. The second nut is installed at the front end of the second screw and is not fixed to the crossbar. The second rotating shaft is connected to the second hole on the spreading plate. Rotating the second handwheel can drive the spreading plate to rotate along the first rotating shaft.

[0007] Furthermore, the first screw includes a telescopic section and a mating section; a locking ring one is provided at the end of the telescopic section near the second handwheel, and a locking ring two is provided on the second screw; locking ring one and locking ring two are fixedly connected by a locking bolt two; a sliding groove two for the movement of the crossbar is provided on the mating section. The telescopic section is provided with threads that match those of the second screw and the threaded sleeve. The internal thread of the telescopic section is a right-hand thread, and the external thread of the telescopic section is a left-hand thread. The external thread of the second screw is a right-hand thread, and the internal thread of the threaded sleeve is a left-hand thread. The internal thread of locking ring one is a left-hand thread. The internal thread of locking ring two is a right-hand thread.

[0008] Furthermore, a locking bolt is installed on the adjusting support to restrict the rotational movement of the threaded sleeve. The installation of locking ring one, locking ring two, locking bolt one, and locking bolt two effectively prevents the material spreading plate from shifting due to impact and human error, thus improving the reliability and stability of the equipment.

[0009] Furthermore, a sealing box is installed on the side of the adjustable support near the spreading plate to prevent air and ash leakage.

[0010] Furthermore, the casing is equipped with a material-pumping hole, which facilitates the cleaning of accumulated dust.

[0011] Working principle: When handwheel one is turned, the threaded sleeve rotates, which in turn drives the first screw, Y-joint, rotating shaft one, second screw, crossbar, connecting rod, rotating shaft two, and spreading plate to move back and forth along the sliding groove one of the sliding support through screw transmission. When handwheel two is turned, the second screw rotates, which causes axial displacement relative to the first screw through screw transmission, pushing the crossbar to move back and forth along the sliding groove two set on the first screw. This, in turn, pushes the connecting rod and the crossbar, and the connecting rod and the spreading plate hole two hinge point to rotate relative to each other, thus pushing the spreading plate to rotate around rotating shaft one.

[0012] The material spreading plate disperses the material from the previous feed pipe into the next stage of the flue, suspending and diffusing the material within the flue to prevent it from plunging downwards with high kinetic energy, thus ensuring sufficient heat exchange between the material and the airflow. Changes in raw materials, their composition, fineness, and ambient temperature can affect the angle of repose, thereby influencing the suspension and dispersion effect. Generally, a larger angle results in a stronger downward movement tendency, a longer downward distance, a shorter horizontal movement distance, poorer dispersion, weaker airflow carrying capacity, and poorer heat exchange. Conversely, a smaller angle results in a longer horizontal movement distance and better dispersion, but as the angle of the spreading plate decreases, the risk of blockage in the feed pipe and spreading box increases. Insufficient spreading plate length, extending too far into the furnace, can also lead to insufficient horizontal throwing distance of the material.

[0013] Due to different process design ideas or the impact of later modifications, the kinetic energy of the material when it reaches the spreading plate will be different, and the horizontal projection distance will also be different. Therefore, it is difficult to have a uniform installation angle and insertion depth when installing the spreading plate. This requires setting the angle according to production. It is more troublesome and costly to readjust the spreading plate after the kiln is opened. Therefore, the online adjustment method is more popular.

[0014] Beneficial effects: Compared with the prior art, the present invention has the following significant features:

[0015] 1. It can realize online individual adjustment of the telescopic length and angle of the spreading plate, as well as the combination adjustment of various process parameters with different telescopic lengths and angles, to meet the working conditions of different production and debugging, with high adjustment accuracy;

[0016] 2. The on-site operation is simple and convenient. Rotating handwheel one adjusts the extension length of the spreading plate, and rotating handwheel two adjusts the angle of the spreading plate.

[0017] 3. Locking devices are designed for telescopic adjustment and angle adjustment to prevent the spreading plate from shifting due to impact and to prevent personnel misoperation, thereby improving the reliability and stability of the equipment.

[0018] 4. A sealing box is installed where the adjustment mechanism protrudes from the housing to prevent air and dust leakage; Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the present invention;

[0020] Figure 2 This is a cross-sectional view of the present invention;

[0021] Figure 3 This is a bottom view of the material spreading plate 5 of the present invention;

[0022] Figure 4This is a front view of the sliding support 4 of the present invention;

[0023] Figure 5 This is a schematic diagram of the structure of the first screw 203 of the present invention;

[0024] Figure 6 This is a cross-sectional view of the first screw 203 of the present invention;

[0025] Figure 7 This is a schematic diagram of the telescopic length adjustment of the present invention;

[0026] Figure 8 This is a schematic diagram of the angle adjustment of the present invention. Detailed Implementation

[0027] like Figures 1-4 The sliding support 4, adjusting support 11, sealing box 12, and material feeding hole 13 are respectively installed on the housing 1. The sliding support 4 is provided with a sliding groove 401 parallel to the axial direction of the first screw 203. The sealing box 12 contains a sealing ring, which is wrapped around the surface of the mating section of the first screw.

[0028] The telescopic adjustment mechanism 2 includes a handwheel 201, a nut 202, a first screw 203, a threaded sleeve 204, a thrust bearing 205, a Y-type connector 207, and a rotating shaft 206. The threaded sleeve 204 is installed on the adjustment support 11. The threaded sleeve 204, thrust bearing 205, handwheel 201, and nut 202 are connected in sequence. The first screw 203 is a hollow screw. The first screw 203 and the threaded sleeve 204 form a helical fit. The first screw 203, Y-type connector 207, and rotating shaft 206 are connected in sequence. The rotating shaft 206 forms a clearance fit with the hole 501 of the spreading plate 5, and simultaneously forms a relative sliding relationship with the sliding groove 401 provided on the sliding support 4.

[0029] The angle adjustment mechanism 3 includes a second handwheel 301, a second screw 302, a crossbar 303, a connecting rod 304, a second rotating shaft 305, and a second nut 306. The second handwheel 301 is installed at the rear end of the second screw 302. The crossbar 303 and the second nut 306 are sequentially installed at the front end of the second screw 302. The second nut 306 is not fixed to the crossbar 303, allowing the second screw 302 and the crossbar 303 to rotate relative to each other. The second screw 302 forms a helical fit with the first screw 203. The first screw 203 has a second sliding groove 10, allowing the second screw 302 to drive the crossbar 303 to slide back and forth within the groove. The crossbar 303, connecting rod 304, and second rotating shaft 305 are connected sequentially, with the second rotating shaft 305 forming a clearance fit with the second hole 502 of the spreading plate 5. The hinge joint between the crossbar 303 and the connecting rod 304 allows relative rotation. Locking bolt 6 is installed on adjusting support 11 to limit the rotational movement of threaded sleeve 204. Locking ring 7 and locking ring 8 are installed on first screw 203 and second screw 204 respectively, and locking bolt 9 connects and fixes locking ring 7 and locking ring 8.

[0030] like Figures 5-6 The first screw 203 includes a telescopic section 2031 and a mating section 2032. The telescopic section 2031 is provided with threads that match those of the second screw 302 and the threaded sleeve 204. A locking ring 7 is provided at the end of the telescopic section 2031 near the second handwheel 301, and a locking ring 8 is provided on the second screw 302. The mating section 2032 is provided with a sliding groove 10 for the movement of the crossbar 303.

[0031] The internal thread of the first screw 203 is a right-hand thread, and the external thread of the telescopic section 2031 is a left-hand thread. Correspondingly, the internal thread of the threaded sleeve 204 is a left-hand thread, the external thread of the second screw 302 is a right-hand thread, the internal thread of the locking ring 7 is a left-hand thread, and the internal thread of the locking ring 8 is a right-hand thread.

[0032] like Figure 7 When the handwheel 201 is turned, the threaded sleeve 204 is rotated, and the first screw 203, Y-type connector 207, rotating shaft 206, second screw 302, crossbar 303, connecting rod 304, rotating shaft 305, and spreading plate 5 are driven by the screw drive to move back and forth along the sliding groove 401 of the sliding support 4.

[0033] like Figure 8 When the handwheel 301 is turned, the second screw 302 is driven to rotate. Through the screw drive, it undergoes axial displacement relative to the first screw 203, pushing the crossbar 303 to move back and forth along the slide groove 10 set on the first screw 203. This, in turn, pushes the connecting rod 304 to rotate relative to the hinge joint between the crossbar 303 and the material spreading plate 5, thereby pushing the material spreading plate 5 to rotate around the rotating shaft 206.

[0034] The transmission threads of the first screw 203, the second screw 302, the locking ring 7, and the locking ring 8 are T-shaped threads with a 30° tooth angle.

[0035] The telescopic range of the spreading plate 5 is 0–200 mm, and the angle adjustment range is 0–20°. The spreading plate 5 is made of 2520 heat-resistant steel.

[0036] Expansion and contraction of the spreading plate 5 in The first screw has a rotation angle of 203, and S is the thread lead.

[0037] Change in angle of the spreading plate Where a is the length of connecting rod 304, b is the distance between holes 501 and 502 of the spreading plate 5, and c is the distance between crossbar 303 and hole 501 of the spreading plate 5. 302 represents the rotation angle of the second screw, and S represents the thread lead.

Claims

1. A combination adjustable spreader, characterized by: The system includes a housing (1), a telescopic adjustment mechanism (2), an angle adjustment mechanism (3), and a material spreading plate (5). The housing (1) is equipped with a sliding support (4) and an adjusting support (11). The telescopic adjustment mechanism (2) includes a handwheel (201), a nut (202), a first screw (203), a threaded sleeve (204), a thrust bearing (205), a Y-type connector (207), and a rotating shaft (206). The threaded sleeve (204) is mounted on the adjusting support (11). The threaded sleeve (204), thrust bearing (205), handwheel (201), and nut (202) are sequentially connected to each other. The first screw (203) is a hollow screw. The first screw (203) is screw-fitted with the threaded sleeve (204). The first screw (203), Y-type connector (207), and rotating shaft (206) are sequentially connected to each other. The rotating shaft (206) is connected to the material spreading plate (5). 5) The hole 1 (501) provided on it is connected, and the rotation of the handwheel 1 (201) can drive the spreading plate (5) to move back and forth along the sliding groove 1 (401) of the sliding support (4); the angle adjustment mechanism (3) includes a handwheel 2 (301), a second screw (302), a cross bar (303), a connecting rod (304), a rotating shaft 2 (305) and a nut 2 (306), and the second screw (302) is screwed to the first screw (203). The second handwheel (301), the second screw (302), the crossbar (303), the connecting rod (304), and the second rotating shaft (305) are connected in sequence. The second nut (306) is installed at the front end of the second screw (302) and is not fixed to the crossbar (303). The second rotating shaft (305) is connected to the second hole (502) provided on the spreading plate (5). The rotation of the second handwheel (301) can drive the spreading plate (5) to rotate along the first rotating shaft (206).

2. A combination adjustable spreader according to claim 1 wherein: The first screw (203) includes a telescopic section (2031) and a mating section (2032); a locking ring (7) is provided at one end of the telescopic section (2031) near the second handwheel (301), and a locking ring (8) is provided on the second screw (302). The locking ring (7) and the locking ring (8) are fixedly connected by a locking bolt (9); a sliding groove (10) for the movement of the crossbar (303) is provided on the mating section (2032).

3. A combination adjustable spreader according to claim 2, wherein: The telescopic section (2031) is provided with threads that match the second screw (302) and the threaded sleeve (204).

4. A combination adjustable spreader according to claim 3, wherein: The internal thread of the telescopic section (2031) is a right-hand thread, and the external thread of the telescopic section (2031) is a left-hand thread.

5. A combined adjustable spreading device according to claim 3, characterized in that: The external thread of the second screw (302) is a right-hand thread, and the internal thread of the threaded sleeve (204) is a left-hand thread.

6. A combination adjustable spreader according to claim 2, wherein: The internal thread of the lock ring (7) is a left-hand thread.

7. A combination adjustable spreader according to claim 2, wherein: The internal thread of the second locking ring (8) is a right-hand thread.

8. A combination adjustable spreader according to claim 1 wherein: A locking bolt (6) is provided on the adjusting support (11).

9. A combination adjustable spreader as claimed in claim 1 wherein: A sealing box (12) is provided on the side of the adjusting support (11) near the spreading plate.

10. A combination adjustable spreader according to claim 1 wherein: The box (1) is provided with a material feeding hole (13).

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