Internal and external sealing mechanism for pull rod of coal mill

Abstract

The invention discloses a coal mill pull rod internal and external sealing mechanism, which comprises a sealing box body, a pull rod is slidably connected in the sealing box body, an external sealing mechanism is arranged at the bottom of the sealing box body, and an internal sealing mechanism is arranged in the sealing box body, and relates to the technical field of coal mill pull rods. According to the internal and external sealing mechanism for the pull rod of the coal mill, the internal sealing mechanism is arranged, a sealing ring and a sealing ring are extruded through a sliding block, so that the sealing ring and the pull rod are attached more tightly, the sealing effect is improved, air or dust is prevented from entering a sealing box body, the phenomena of powder leakage and pull rod abrasion are reduced, and the production efficiency is improved; the outer sealing mechanism is arranged, the pull rod is wrapped by the sealing folding pipe, the sealing performance is kept, and the sealing gasket is arranged at the joint of the connecting flange and the bottom of the sealing box body, so that external air or dust is prevented from entering the sealing box body through the joint of the pull rod and the bottom of the sealing box body.

Description

Technical Field

[0001] The invention relates to the technical field of a coal mill tie rod, in particular to an internal and external sealing mechanism of a coal mill tie rod. Background Art

[0002] The reference patent name is: A coal mill tie rod sealing device (patent publication number: CN212959842U, patent publication date: 2021.04.13), comprising a sealing device housing, a coal mill tie rod is arranged inside the sealing device housing, a sealing mechanism is arranged on the periphery of the coal mill tie rod, the sealing mechanism comprises a lower through hole, a lower dust prevention ring is arranged under the lower through hole, the coal mill tie rod passes through the lower dust prevention ring, a lower sealing ring is arranged on the lower dust prevention ring, the coal mill tie rod passes through the lower sealing ring, a lower ball fixing ring is arranged on the lower sealing ring, the coal mill tie rod passes through the lower ball fixing ring, a plurality of metal balls are arranged inside the lower ball fixing ring, a tie rod fixing block is arranged in the middle of the coal mill tie rod, and stabilizing rods are symmetrically arranged on both sides of the tie rod fixing block. This sealing device reduces the phenomenon of powder leakage and tie rod wear, improves production efficiency, does not need to frequently replace the sealing device, reduces environmental pollution, wastes energy, increases energy consumption and is unfavorable to civilized production.

[0003] Based on what is described in the above-mentioned documents: the existing pull rod is made of rigid material, and the seal is in a high-temperature coal powder environment, powder leakage and wear of the pull rod often occur, and the powdered material will enter the lower seal along the pull rod and damage the lower seal, causing the powdered material to leak out. When the powder leakage is serious, the medium-speed mill will be forced to stop operating, seriously affecting the working efficiency of the coal mill. For this reason, the present invention provides an internal and external sealing mechanism for the pull rod of the coal mill. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides an internal and external sealing mechanism for a coal mill tie rod, which solves the problem that the prior tie rod is made of rigid material, the seal is in a high-temperature coal powder environment, powder leakage and wear of the tie rod often occur, and the powdered material will enter the lower seal along the tie rod and damage the lower seal, causing the powdered material to leak out. In the event of serious powder leakage, the medium-speed mill will be forced to stop operating, seriously affecting the working efficiency of the coal mill.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: a coal mill pull rod internal and external sealing mechanism, including a sealing box, the inside of which is slidably connected with a pull rod, an external sealing mechanism at the bottom of the sealing box, an internal sealing mechanism inside the sealing box, and the internal sealing mechanism including:

[0006] The inner sealing assembly comprises a sealing block installed on the inner wall of the sealing box, a sealing ring is arranged on the inner wall of the sealing block, a sliding groove is opened on the surface of the sealing block, a sealing ring is arranged on the inner wall of the sliding groove, a sliding block is slidably connected to the inner surface of the sliding groove, and a connecting plate is fixedly connected to the surface of the sliding block;

[0007] A limit assembly is arranged on the inner wall of the sealed box;

[0008] The reinforcement component is arranged inside the sealed box.

[0009] Preferably, the limiting assembly comprises a limiting rod installed at the bottom of the connecting plate and a limiting column installed at the bottom of the inner cavity of the sealing box, and the interior of the limiting column is slidably connected to the surface of the limiting rod.

[0010] Preferably, the reinforcement assembly includes a worm rotatably mounted on the inner wall of the sealing box, one end of the worm extends through and to the outside of the sealing box, one end of the worm is fixedly connected to a control block, and the surface of the worm causes a protrusion to rotate through a transmission assembly, and the surface of the protrusion fits with the surface of the connecting plate.

[0011] Preferably, the transmission assembly includes a transmission rod rotatably mounted on the inner wall of the sealing box, the surface of the transmission rod is fixedly connected to a turbine, the surface of the turbine is meshed with the surface of the worm, and the surface of the transmission rod is fixedly connected to the inside of the protrusion.

[0012] Preferably, two sealing blocks are provided and are respectively arranged at the top and bottom of the inner cavity of the sealing box, and a sealing gasket is provided between the sealing block and the sealing box.

[0013] Preferably, the external sealing mechanism includes a connecting flange installed at the bottom of the sealing box body, a sealing folding tube is installed at the bottom of the connecting flange, the bottom end of the sealing folding tube is fixedly connected to a sealing box through a fixing flange, the interior of the sealing box is fixedly connected to the surface of the pull rod, the inner wall of the sealing box is slidably connected to a sliding plate, a sealing packing is provided on one side of the sliding plate, and the inner surface of the sealing packing is in contact with the surface of the pull rod.

[0014] Preferably, a vent hole is opened on the top of the sealed box body, the top end of the vent hole is connected to the inside of the sealed folding tube, the bottom end of the vent hole is fixedly connected to an air pipe, and one end of the air pipe is fixedly connected to a rubber airbag.

[0015] Preferably, symmetrical positioning blocks are installed on the inner wall of the sealing box, and the inner side of the positioning blocks is in contact with the surface of the sliding plate.

[0016] Beneficial Effects

[0017] The present invention provides an inner and outer sealing mechanism for a coal mill pull rod. Compared with the prior art, the present invention has the following advantages:

[0018] Beneficial effects:

[0019] (1) The internal and external sealing mechanism of the pull rod of the coal mill drives the worm to rotate by rotating the control block, and the rotation of the worm drives the turbine to rotate, and the rotation of the turbine drives the transmission rod and the protrusion to rotate. The rotation of the protrusion makes the upper and lower connecting plates and the slider slide to the opposite sides synchronously, and the sliding of the connecting plate drives the limit rod to slide inside the limit column. When the slider slides, it squeezes the sealing ring and the sealing ring, so that the sealing ring fits the inner surface of the sliding groove, which is used to seal the connection between the slider and the sealing block, so that the sealing ring fully fits the surface of the pull rod to achieve internal sealing operation. By providing an internal sealing mechanism, the slider is used to squeeze the sealing ring and the sealing ring, so that the sealing ring and the pull rod fit more closely, thereby increasing the sealing effect, preventing air or dust from entering the sealing box, reducing the phenomenon of powder leakage and wear of the pull rod, and improving production efficiency.

[0020] (2) The internal and external sealing mechanism of the pull rod of the coal mill is provided with an external sealing mechanism, and the pull rod is wrapped with a sealing folding tube to maintain the sealing performance. A sealing gasket is provided at the connection between the connecting flange and the bottom of the sealing box body to prevent external air or dust from entering the sealing box body through the connection between the pull rod and the bottom of the sealing box body.

[0021] (3) The internal and external sealing mechanism of the pull rod of the coal mill forms an air circulation by arranging a rubber airbag in cooperation with a sealing folding tube to maintain the internal air flow. At the same time, when the sealing folding tube is compressed, the air enters the rubber airbag, and the expanded rubber airbag squeezes the sliding plate and the sealing packing, so that the sealing packing fits more fully with the surface of the pull rod, thereby improving the sealing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a three-dimensional schematic diagram of the external structure of the present invention;

[0023] Figure 2 It is a schematic diagram of the internal structure of the sealed box of the present invention;

[0024] Figure 3 It is a schematic cross-sectional view of the internal structure of the sealed box of the present invention;

[0025] Figure 4 It is a schematic diagram of the explosion structure of the inner sealing component of the present invention;

[0026] Figure 5 It is a three-dimensional schematic diagram of the outer sealing mechanism of the present invention;

[0027] Figure 6 It is a schematic diagram of the internal structure of the sealing box of the present invention.

[0028] In the figure: 1-sealing box, 2-pull rod, 3-external sealing mechanism, 31-connecting flange, 32-sealing folding tube, 33-sealing box, 34-sliding plate, 35-sealing packing, 4-inner sealing mechanism, 41-inner sealing assembly, 411-sealing block, 412-sealing ring, 413-sliding groove, 414-sealing ring, 415-sliding block, 416-connecting plate, 42-limiting assembly, 421-limiting rod, 422-limiting column, 43-reinforcement assembly, 431-worm, 432-control block, 433-bump, 5-transmission assembly, 51-transmission rod, 52-turbine, 6-sealing pad, 7-vent, 8-trachea, 9-rubber airbag, 10-positioning block. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] See also Figure 1-6 , the present invention provides two technical solutions:

[0031] Embodiment 1

[0032] A coal mill pull rod internal and external sealing mechanism comprises a sealing box 1, a pull rod 2 is slidably connected inside the sealing box 1, an external sealing mechanism 3 is provided at the bottom of the sealing box 1, and an internal sealing mechanism 4 is provided inside the sealing box 1. The internal sealing mechanism 4 comprises:

[0033] The inner sealing assembly 41 comprises a sealing block 411 mounted on the inner wall of the sealing box 1. The sealing block 411 is fixed to the top and bottom of the inner cavity of the sealing box 1 by bolts. A sealing ring 412 is arranged on the inner wall of the sealing block 411. A sliding groove 413 is provided on the surface of the sealing block 411. A sealing ring 414 is arranged on the inner wall of the sliding groove 413. A sliding block 415 is slidably connected to the inner surface of the sliding groove 413. A connecting plate 416 is fixedly connected to the surface of the sliding block 415.

[0034] The limiting component 42 is arranged on the inner wall of the sealing box 1;

[0035] The reinforcement component 43 is arranged inside the sealed box body 1. The limiting component 42 includes a limiting rod 421 installed at the bottom of the connecting plate 416 and a limiting column 422 installed at the bottom of the inner cavity of the sealed box body 1. The limiting column 422 and the limiting rod 421 are used to limit the sliding of the connecting plate 416 and the slider 415. The inside of the limiting column 422 is slidably connected to the surface of the limiting rod 421. The reinforcement component 43 includes a worm 431 rotatably installed on the inner wall of the sealed box body 1. One end of the worm 431 extends through the outside of the sealed box body 1. One end of the worm 431 is fixedly connected to a control The surface of the worm 431 causes the protrusion 433 to rotate through the transmission assembly 5, and the surface of the protrusion 433 is in contact with the surface of the connecting plate 416. The transmission assembly 5 includes a transmission rod 51 rotatably mounted on the inner wall of the sealing box 1, and the surface of the transmission rod 51 is fixedly connected with the turbine 52. The transmission rod 51, the turbine 52 and the protrusion 433 are each provided with two pieces, and the surface of the turbine 52 is meshed with the surface of the worm 431. The surface of the transmission rod 51 is fixedly connected with the inside of the protrusion 433. The sealing block 411 is provided with two pieces and is respectively arranged at the top and bottom of the inner cavity of the sealing box 1. The sealing block 411 and the sealing box body 1 are provided with a sealing gasket 6, which is used to seal the connection between the sealing block 411 and the inner wall of the sealing box body 1. The worm 431 is driven to rotate by rotating the control block 432, and the rotation of the worm 431 drives the turbine 52 to rotate. The rotation of the turbine 52 drives the transmission rod 51 and the protrusion 433 to rotate. The rotation of the protrusion 433 causes the upper and lower connecting plates 416 and the slider 415 to slide to the opposite sides synchronously. The sliding of the connecting plate 416 drives the limiting rod 421 to slide inside the limiting column 422. When the slider 415 slides, it squeezes The sealing ring 412 and the sealing ring 414 are pressed so that the sealing ring 414 fits against the inner surface of the sliding groove 413, which is used to seal the connection between the slider 415 and the sealing block 411, so that the sealing ring 412 fully fits against the surface of the pull rod 2, thereby realizing the internal sealing operation. By providing an internal sealing mechanism 4, the slider 415 is used to extrude the sealing ring 414 and the sealing ring 412, so that the sealing ring 412 and the pull rod 2 fit more closely, thereby increasing the sealing effect, preventing air or dust from entering the sealing box 1, reducing the phenomenon of powder leakage and wear of the pull rod, and improving production efficiency.

[0036] Embodiment 2

[0037] A coal mill pull rod internal and external sealing mechanism, the external sealing mechanism 3 includes a connecting flange 31 installed at the bottom of a sealing box body 1, the connecting flange 31 is installed at the bottom of the sealing box body 1 by bolts, and the connection between the two is sealed by a sealing gasket, a sealing folded tube 32 is installed at the bottom of the connecting flange 31, the bottom end of the sealing folded tube 32 is fixedly connected to a sealing box 33 by a fixing flange, the interior of the sealing box 33 is fixedly connected to the surface of the pull rod 2, the inner wall of the sealing box 33 is slidably connected to a sliding plate 34, one side of the sliding plate 34 is provided with a sealing packing 35, the inner surface of the sealing packing 35 is fitted with the surface of the pull rod 2, a vent 7 is opened on the top of the sealing box body 1, the top of the vent 7 is connected to the interior of the sealing folded tube 32, the bottom end of the vent 7 is fixedly connected to an air pipe 8, one end of the air pipe 8 is fixedly connected to a rubber airbag 9, the rubber airbag 9 will squeeze the sliding plate 34 and the sealing packing 35 after being inflated, the inner wall of the sealing box 33 is installed with a symmetrical positioning block 10, the vent The sealing packing 35 and the sliding plate 34 are limited by the positioning block 10, and the sealing packing 35 can also maintain a close fit with the pull rod 2. The inner side of the positioning block 10 is in fit with the surface of the sliding plate 34. By providing an external sealing mechanism 3, the pull rod 2 is wrapped with a sealing folding tube 32 to maintain the sealing performance. A sealing gasket 6 is provided at the connection between the connecting flange 31 and the bottom of the sealing box body 1 to prevent external air or dust from entering the sealing box body 1 through the connection between the pull rod 2 and the bottom of the sealing box body 1. An air circulation is formed by providing a rubber airbag 9 in cooperation with the sealing folding tube 32 to maintain the internal air flow. At the same time, when the sealing folding tube 32 is compressed, after the air enters the rubber airbag 9, the expanded rubber airbag 9 will squeeze the sliding plate 34 and the sealing packing 35, so that the sealing packing 35 and the surface of the pull rod 2 are more fully fitted, thereby improving the sealing effect. At the same time, the contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0038] First, the worm 431 is driven to rotate by rotating the control block 432, and the rotation of the worm 431 drives the turbine 52 to rotate, and the rotation of the turbine 52 drives the transmission rod 51 and the protrusion 433 to rotate. The rotation of the protrusion 433 makes the upper and lower connecting plates 416 and the slider 415 slide to the opposite sides synchronously, and the sliding of the connecting plate 416 drives the limiting rod 421 to slide inside the limiting column 422. When the slider 415 slides, it squeezes the sealing ring 412 and the sealing ring 414, so that the sealing ring 414 fits the inner surface of the sliding groove 413, which is used to seal the connection between the slider 415 and the sealing block 411, so that the sealing ring 412 is fully fitted on the pull rod 2. The surface realizes the internal sealing operation. During operation, when the pull rod 2 moves upward, it will drive the sealing box 33 to move synchronously, so that the sealing folding tube 32 is compressed. At this time, the air inside the sealing folding tube 32 enters the rubber airbag 9 arranged inside the sealing box 33 through the vent hole 7 and the air pipe 8 on the top of the sealing box 33, so that the rubber airbag 9 expands. The expanded rubber airbag 9 squeezes the sliding plate 34, so that the outer sides of the sliding plates 34 on both sides are separated from the inner sides of the positioning block 10, and the sliding plates 34 on both sides slide to the opposite sides synchronously. The sliding of the sliding plate 34 squeezes the sealing packing 35, so that the sealing packing 35 and the pull rod 2 fit more closely, thereby realizing the external sealing operation.

[0039] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0040] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A coal mill tie rod internal and external sealing mechanism, comprising a sealing box (1), characterized in that: The interior of the sealed box (1) is slidably connected with a pull rod (2), the bottom of the sealed box (1) is provided with an external sealing mechanism (3), the interior of the sealed box (1) is provided with an internal sealing mechanism (4), and the internal sealing mechanism (4) includes: The inner sealing assembly (41) comprises a sealing block (411) mounted on the inner wall of the sealing box (1), the inner wall of the sealing block (411) being provided with a sealing ring (412), a sliding groove (413) being provided on the surface of the sealing block (411), a sealing ring (414) being provided on the inner wall of the sliding groove (413), a sliding block (415) being slidably connected to the inner surface of the sliding groove (413), and a connecting plate (416) being fixedly connected to the surface of the sliding block (415); A limit assembly (42) is arranged on the inner wall of the sealed box (1); The reinforcement component (43) is arranged inside the sealed box body (1).

2. The inner and outer sealing mechanism of a coal mill tie rod according to claim 1, characterized in that: The limiting assembly (42) comprises a limiting rod (421) installed at the bottom of the connecting plate (416) and a limiting column (422) installed at the bottom of the inner cavity of the sealing box (1), and the interior of the limiting column (422) is slidably connected to the surface of the limiting rod (421).

3. The inner and outer sealing mechanism of a coal mill tie rod according to claim 1, characterized in that: The reinforcement component (43) comprises a worm (431) rotatably mounted on the inner wall of the sealing box (1); one end of the worm (431) extends through the outside of the sealing box (1); one end of the worm (431) is fixedly connected to a control block (432); the surface of the worm (431) causes a protrusion (433) to rotate through a transmission component (5); and the surface of the protrusion (433) is in contact with the surface of the connecting plate (416).

4. The inner and outer sealing mechanism of a coal mill tie rod according to claim 3, characterized in that: The transmission assembly (5) comprises a transmission rod (51) rotatably mounted on the inner wall of the sealing box (1); a turbine (52) is fixedly connected to the surface of the transmission rod (51); the surface of the turbine (52) is meshed with the surface of the worm (431); and the surface of the transmission rod (51) is fixedly connected to the inside of the protrusion (433).

5. The inner and outer sealing mechanism of a coal mill tie rod according to claim 1, characterized in that: Two sealing blocks (411) are provided and are respectively arranged at the top and bottom of the inner cavity of the sealing box body (1); a sealing gasket (6) is provided between the sealing block (411) and the sealing box body (1).

6. The inner and outer sealing mechanism of a coal mill tie rod according to claim 1, characterized in that: The external sealing mechanism (3) includes a connecting flange (31) installed at the bottom of the sealing box (1), a sealing folding tube (32) is installed at the bottom of the connecting flange (31), the bottom end of the sealing folding tube (32) is fixedly connected to a sealing box (33) through a fixing flange, the interior of the sealing box (33) is fixedly connected to the surface of the pull rod (2), the inner wall of the sealing box (33) is slidably connected to a sliding plate (34), and a sealing packing (35) is provided on one side of the sliding plate (34), and the inner surface of the sealing packing (35) is in contact with the surface of the pull rod (2).

7. The inner and outer sealing mechanism of the pull rod of a coal mill according to claim 6, characterized in that: A vent hole (7) is provided on the top of the sealed box body (1), the top end of the vent hole (7) is connected to the inside of the sealed folded tube (32), the bottom end of the vent hole (7) is fixedly connected to an air pipe (8), and one end of the air pipe (8) is fixedly connected to a rubber airbag (9).

8. The inner and outer sealing mechanism of a pull rod of a coal mill according to claim 6, characterized in that: A symmetrical positioning block (10) is installed on the inner wall of the sealing box (33), and the inner side of the positioning block (10) is in contact with the surface of the sliding plate (34).

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