A flexible connection structure for coal dropping pipe

Abstract

The present invention discloses a flexible connection structure for a coal drop pipe, comprising: an upper coal drop pipe; a lower coal drop pipe; a connecting cloth; and also comprising: a first coal blocking barrel, wherein the first coal blocking barrel is coaxial with the upper coal drop pipe, the upper portion of the first coal blocking barrel is fixedly connected to the lower surface of the first flange, the first coal blocking barrel is located in a space surrounded by the connecting cloth, the first flange, and the second flange, and the distance between the lower end of the first coal blocking barrel and the second flange is greater than the maximum amplitude B, which is the maximum value of the change in the distance between the lower surface of the first flange and the upper surface of the second flange when the upper coal drop pipe and the lower coal drop pipe vibrate during coal transportation. Furthermore, the inner diameter of the first coal blocking barrel gradually decreases from top to bottom. This solves the problem that the connecting cloth in the prior art is very easy to wear and break, and the probability of coal powder leakage is very high.

Description

Technical Field

[0001] The invention relates to the technical field of coal dropping pipes, and in particular to a flexible connection structure of a coal dropping pipe. Background Art

[0002] The coal pipe is a pipe used for transporting coal in a thermal power plant. The coal pipe will vibrate when transporting coal. In order to avoid the upper and lower coal pipes vibrating at the same time and causing mutual extrusion to damage the coal pipe, the upper and lower coal pipes will not be directly rigidly connected, but connected by a connecting cloth between the flange at the lower end of the upper coal pipe and the flange at the upper end of the lower coal pipe, so that the connecting cloth, the first flange and the second flange together form a side-sealed space, so that the coal powder is blocked by the connecting cloth and will not fall out. At the same time, the upper and lower coal pipes are connected flexibly to avoid mutual extrusion between the upper and lower coal pipes to damage the coal pipe. However, the problem with this existing structure is that the coal powder has very high kinetic energy when it is transported in the coal pipe. After the high kinetic energy coal powder contacts the connecting cloth, it will produce friction with the connecting cloth, making the connecting cloth very easy to wear and break, and the probability of coal powder leakage is very high. Summary of the invention

[0003] In order to solve the above shortcomings and deficiencies of the prior art, an object of the present invention is to provide a flexible connection structure of a coal drop pipe.

[0004] The technical solution of the present invention is: a coal drop pipe flexible connection structure, comprising:

[0005] An upper coal-dropping pipe, the lower end of which is fixedly connected to a first flange;

[0006] A lower coal-dropping pipe, the upper end of which is fixedly connected to a second flange, and the lower coal-dropping pipe is coaxial with the upper coal-dropping pipe;

[0007] A connecting cloth, wherein the upper end of the connecting cloth is fixedly connected to the lower surface of the first flange, and the lower end of the connecting cloth is fixedly connected to the upper surface of the second flange, the connecting cloth, the first flange and the second flange together enclose a side-sealed space, and the upper and lower widths of the connecting cloth are greater than the distance between the lower surface of the first flange and the upper surface of the second flange;

[0008] Also includes:

[0009] The first coal retaining cylinder is coaxial with the upper and lower coal pipes, the upper part of the first coal retaining cylinder is fixedly connected to the lower surface of the first flange, the first coal retaining cylinder is located in the space surrounded by the connecting cloth, the first flange and the second flange, and the distance between the lower end of the first coal retaining cylinder and the second flange is greater than the maximum amplitude B, and the maximum amplitude B is the maximum value of the distance change between the lower surface of the first flange and the upper surface of the second flange caused by the vibration of the upper and lower coal pipes during coal transportation.

[0010] Furthermore, the inner diameter of the first coal retaining tube gradually decreases from top to bottom.

[0011] Furthermore, it also includes:

[0012] The second coal retaining barrel, the lower end of which is fixedly connected to the upper surface of the second flange, the second coal retaining barrel is coaxial with the first coal retaining barrel, the inner surface of the second coal retaining barrel is parallel to the outer surface of the first coal retaining barrel, and the distance between the upper end of the second coal retaining barrel and the first flange is greater than the maximum amplitude B. The maximum amplitude B is the maximum value of the change in the distance between the lower surface of the first flange and the upper surface of the second flange caused by the vibration of the upper coal pipe and the lower coal pipe during coal transportation.

[0013] Furthermore, it also includes:

[0014] The first flexible stopper, the inner surface of the first flexible stopper is fixedly connected to the outer surface of the first coal stopper, the first flexible stopper surrounds the central axis of the first coal stopper at least once in the length direction, and the outer surface of the first flexible stopper contacts the inner surface of the second coal stopper.

[0015] Furthermore, it also includes:

[0016] A second flexible stopper, wherein the outer surface of the second flexible stopper is fixedly connected to the inner surface of the second coal stopper barrel, and the inner surface of the second coal stopper barrel is in sealing contact with the outer surface of the first coal stopper barrel.

[0017] Furthermore, the upper surface of the second flexible stopper matches the lower surface of the first flexible stopper, and the distance L from the upper surface of the second flexible stopper to the lower surface of the second flexible stopper is less than the minimum amplitude A. The minimum amplitude A is the minimum value of the change in the distance between the lower surface of the first flange and the upper surface of the second flange caused by the vibration of the upper and lower coal pipes during coal transportation.

[0018] Furthermore, the first flexible stopper and the second flexible stopper are made of rubber.

[0019] Furthermore, the connecting cloth is a dense cloth.

[0020] The beneficial effects of the present invention are: compared with the prior art,

[0021] 1) When the present invention is used, the first coal blocking cylinder blocks most of the coal powder moving from the upper coal conveying pipe to the lower coal conveying pipe in the first coal blocking cylinder, so as to prevent the high kinetic energy coal powder from contacting the connecting cloth and causing the connecting cloth to lose, thereby reducing the loss of the connecting cloth and the probability of coal powder leakage. At the same time, since the distance between the lower end of the first coal blocking cylinder and the second flange is greater than the maximum amplitude B, the first flange and the second flange still maintain a flexible connection;

[0022] 2) The present invention gradually reduces the inner diameter of the first coal retaining tube from top to bottom, so that the coal powder moves toward the central axis of the first coal retaining tube after hitting the first coal retaining tube, thereby preventing the coal powder from directly rushing into the second flange and rebounding to hit the connecting cloth, causing the connecting cloth to be damaged;

[0023] 3) The present invention further blocks the coal powder by the second coal blocking cylinder, thereby preventing the coal powder from passing through the gap between the first coal blocking cylinder and the second flange and hitting the connecting cloth;

[0024] 4) The present invention further blocks the coal powder that may pass through the gap between the first coal blocking cylinder and the second coal blocking cylinder through the first flexible blocking block;

[0025] 5) The present invention further blocks the coal powder that may pass through the gap between the first coal blocking cylinder and the second coal blocking cylinder through the second flexible block;

[0026] 6) The present invention makes the upper surface of the second flexible stopper match the lower surface of the first flexible stopper, and the distance L from the upper surface of the second flexible stopper to the lower surface of the second flexible stopper is less than the minimum amplitude A, so that the second flexible stopper and the first flexible stopper fit each other when the coal conveying pipe vibrates, so that the gap between the first flexible stopper and the second flexible stopper is close to zero, thereby achieving the effect of completely blocking the coal powder and avoiding the accumulation of coal powder between the connecting cloth and the second coal blocking barrel;

[0027] 7) The present invention ensures the sealing between the first and second coal blocking barrels and the wear resistance of the first and second flexible blocking barrels by setting the material of the first and second flexible blocking barrels to rubber;

[0028] 8) The present invention makes the connecting cloth a dense cloth, so that the connecting cloth does not leak coal powder, and the wear resistance and durability of the connecting cloth are also improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the three-dimensional structure of implementation example 1 of the present invention;

[0030] Figure 2 It is a front view of an embodiment 1 of the present invention;

[0031] Figure 3 for Figure 2 Section view of the AA section line;

[0032] Figure 4 for Figure 3 The local schematic diagram of point B in the middle;

[0033] Figure 5 It is a schematic diagram of the three-dimensional structure of Embodiment 2 of the present invention;

[0034] Figure 6 It is a front view of Embodiment 2 of the present invention;

[0035] Figure 7 for Figure 6 Sectional view of the CC section line;

[0036] Figure 8for Figure 7 Partial schematic diagram at point D in the middle. DETAILED DESCRIPTION

[0037] The invention is further described below in conjunction with the accompanying drawings and specific embodiments:

[0038] Example 1: Reference Figures 1 to 4 A coal drop pipe flexible connection structure comprises: an upper coal drop pipe 1, the lower end of the upper coal drop pipe 1 is welded or integrally formed to a first flange 101, and the upper coal drop pipe 1 is in the shape of a circular tube; a lower coal drop pipe 2, the upper end of the lower coal drop pipe 2 is welded or integrally formed to a second flange 201, the lower coal drop pipe 2 is coaxial with the upper coal drop pipe 1, and the lower coal drop pipe 2 is in the shape of a circular tube; a connecting cloth 3, the upper end of the connecting cloth 3 is bonded or bolted to the lower surface of the first flange 101, the lower end of the connecting cloth 3 is bonded or bolted to the upper surface of the second flange 201, the connecting cloth 3, the first flange 101 and the second flange 201 together enclose a side sealed space, the connecting cloth 3 The upper and lower widths are greater than the distance between the lower surface of the first flange 101 and the upper surface of the second flange 201; it also includes: a first coal blocking barrel 4, which is coaxial with the upper and lower coal pipes 1, and the upper part of the first coal blocking barrel 4 is welded to the lower surface of the first flange 101. The first coal blocking barrel 4 is located in the space surrounded by the connecting cloth 3, the first flange 101 and the second flange 201. The distance between the lower end of the first coal blocking barrel 4 and the second flange 201 is greater than the maximum amplitude B. The maximum amplitude B is the maximum value of the change in the distance between the lower surface of the first flange 101 and the upper surface of the second flange 201 generated by the vibration of the upper and lower coal pipes 1 and 2 during coal transportation, and the first coal blocking barrel 4 is cylindrical.

[0039] Furthermore, the inner diameter of the first coal retaining cylinder 4 gradually decreases from top to bottom.

[0040] Furthermore, it also includes: a second coal retaining barrel 5, the lower end of which is welded to the upper surface of the second flange 201, the second coal retaining barrel 5 is coaxial with the first coal retaining barrel 4, the inner surface of the second coal retaining barrel 5 is parallel to the outer surface of the first coal retaining barrel 4, the distance between the upper end of the second coal retaining barrel 5 and the first flange 101 is greater than the maximum amplitude B, the maximum amplitude B is the maximum value of the change in the distance between the lower surface of the first flange 101 and the upper surface of the second flange 201 generated by the vibration of the upper coal pipe 1 and the lower coal pipe 2 during coal transportation, and the second coal retaining barrel 5 is cylindrical.

[0041] Furthermore, it also includes: a first flexible stopper 6, the inner surface of which is bonded or bolted to the outer surface of the first coal blocking barrel 4, the first flexible stopper 6 at least surrounds the central axis of the first coal blocking barrel 4 in the length direction, and the outer surface of the first flexible stopper 6 contacts the inner surface of the second coal blocking barrel 5.

[0042] Furthermore, it also includes: a second flexible stopper 7, the outer surface of the second flexible stopper 7 is bonded or bolted to the inner surface of the second coal blocking cylinder 5, and the inner surface of the second coal blocking block is in sealing contact with the outer surface of the first coal blocking cylinder 4.

[0043] Furthermore, the upper surface of the second flexible stopper 7 matches the lower surface of the first flexible stopper 6, and the distance L from the upper surface of the second flexible stopper 7 to the lower surface of the second flexible stopper 7 is less than the minimum amplitude A, and the minimum amplitude A is the minimum value of the change in the distance between the lower surface of the first flange 101 and the upper surface of the second flange 201 caused by the vibration of the upper coal pipe 1 and the lower coal pipe 2 during coal transportation.

[0044] Furthermore, the first flexible stopper 6 and the second flexible stopper 7 are made of rubber.

[0045] Furthermore, the connecting cloth 3 is a dense cloth.

[0046] Example 2: Reference Figures 5 to 8 A coal-dropping pipe flexible connection structure comprises: an upper coal-dropping pipe 1, wherein the lower end of the upper coal-dropping pipe 1 is welded or integrally formed to a first flange 101, and the upper coal-dropping pipe 1 is in the shape of a house pipe; a lower coal-dropping pipe 2, wherein the upper end of the lower coal-dropping pipe 2 is welded or integrally formed to a second flange 201, the lower coal-dropping pipe 2 is coaxial with the upper coal-dropping pipe 1, and is in the shape of a square pipe; a connecting cloth 3, wherein the upper end of the connecting cloth 3 is bonded or bolted to the lower surface of the first flange 101, and the lower end of the connecting cloth 3 is bonded or bolted to the upper surface of the second flange 201, the connecting cloth 3, the first flange 101 and the second flange 201 together enclose a side-sealed space, and the connecting cloth 3 The upper and lower widths are greater than the distance between the lower surface of the first flange 101 and the upper surface of the second flange 201; it also includes: a first coal blocking barrel 4, which is coaxial with the upper and lower coal pipes 1, and the upper part of the first coal blocking barrel 4 is welded to the lower surface of the first flange 101. The first coal blocking barrel 4 is located in the space surrounded by the connecting cloth 3, the first flange 101 and the second flange 201. The distance between the lower end of the first coal blocking barrel 4 and the second flange 201 is greater than the maximum amplitude B. The maximum amplitude B is the maximum value of the change in the distance between the lower surface of the first flange 101 and the upper surface of the second flange 201 generated by the vibration of the upper and lower coal pipes 1 and 2 during coal transportation. The first coal blocking barrel 4 is a square cylinder.

[0047] Furthermore, the inner diameter of the first coal retaining cylinder 4 gradually decreases from top to bottom.

[0048] Furthermore, it also includes: a second coal retaining barrel 5, the lower end of which is welded to the upper surface of the second flange 201, the second coal retaining barrel 5 is coaxial with the first coal retaining barrel 4, the inner surface of the second coal retaining barrel 5 is parallel to the outer surface of the first coal retaining barrel 4, the distance between the upper end of the second coal retaining barrel 5 and the first flange 101 is greater than the maximum amplitude B, the maximum amplitude B is the maximum value of the change in the distance between the lower surface of the first flange 101 and the upper surface of the second flange 201 generated by the vibration of the upper coal pipe 1 and the lower coal pipe 2 during coal transportation, and the second coal retaining barrel 5 is a square cylinder.

[0049] Furthermore, it also includes: a first flexible stopper 6, the inner surface of which is bonded or bolted to the outer surface of the first coal blocking barrel 4, the first flexible stopper 6 at least surrounds the central axis of the first coal blocking barrel 4 in the length direction, and the outer surface of the first flexible stopper 6 contacts the inner surface of the second coal blocking barrel 5.

[0050] Furthermore, it also includes: a second flexible stopper 7, the outer surface of which is fixedly connected to the inner surface of the second coal blocking cylinder 5, and the inner surface of the second coal blocking block is in sealing contact with the outer surface of the first coal blocking cylinder 4.

[0051] Furthermore, the upper surface of the second flexible stopper 7 matches the lower surface of the first flexible stopper 6, and the distance L from the upper surface of the second flexible stopper 7 to the lower surface of the second flexible stopper 7 is less than the minimum amplitude A, and the minimum amplitude A is the minimum value of the change in the distance between the lower surface of the first flange 101 and the upper surface of the second flange 201 caused by the vibration of the upper coal pipe 1 and the lower coal pipe 2 during coal transportation.

[0052] Furthermore, the first flexible stopper 6 and the second flexible stopper 7 are made of rubber.

[0053] Furthermore, the connecting cloth 3 is a dense cloth.

[0054] The above contents are further detailed descriptions of the present invention in combination with specific preferred embodiments, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the protection scope of the present invention.

Claims

1. A flexible connection structure of a coal drop pipe, comprising: An upper coal drop pipe (1), the lower end of the upper coal drop pipe (1) being fixedly connected to a first flange (101); A lower coal drop pipe (2), the upper end of the lower coal drop pipe (2) being fixedly connected to a second flange (201), the lower coal drop pipe (2) being coaxial with the upper coal drop pipe (1); A connecting cloth (3), wherein the upper end of the connecting cloth (3) is fixedly connected to the lower surface of the first flange (101), and the lower end of the connecting cloth (3) is fixedly connected to the upper surface of the second flange (201); the connecting cloth (3), the first flange (101) and the second flange (201) together enclose a side-sealed space, and the upper and lower widths of the connecting cloth (3) are greater than the distance between the lower surface of the first flange (101) and the upper surface of the second flange (201); It is characterized by further comprising: a first coal retaining cylinder (4), wherein the first coal retaining cylinder (4) is coaxial with the upper and lower coal pipes (1), the upper portion of the first coal retaining cylinder (4) is fixedly connected to the lower surface of the first flange (101), the first coal retaining cylinder (4) is located in a space surrounded by the connecting cloth (3), the first flange (101) and the second flange (201), the distance between the lower end of the first coal retaining cylinder (4) and the second flange (201) is greater than a maximum amplitude B, the maximum amplitude B being the maximum value of the change in the distance between the lower surface of the first flange (101) and the upper surface of the second flange (201) caused by vibration generated by the upper and lower coal pipes (1) and the lower coal pipes (2) during coal transportation; A second coal retaining barrel (5), wherein the lower end of the second coal retaining barrel (5) is fixedly connected to the upper surface of the second flange (201), the second coal retaining barrel (5) is coaxial with the first coal retaining barrel (4), the inner surface of the second coal retaining barrel (5) is parallel to the outer surface of the first coal retaining barrel (4), and the distance between the upper end of the second coal retaining barrel (5) and the first flange (101) is greater than the maximum amplitude B, and the maximum amplitude B is the maximum value of the distance change between the lower surface of the first flange (101) and the upper surface of the second flange (201) generated by the vibration of the upper coal pipe (1) and the lower coal pipe (2) during coal transportation; A first flexible stopper (6), wherein the inner surface of the first flexible stopper (6) is fixedly connected to the outer surface of the first coal stopper barrel (4), the first flexible stopper (6) surrounds the central axis of the first coal stopper barrel (4) at least once in the length direction, and the outer surface of the first flexible stopper (6) contacts the inner surface of the second coal stopper barrel (5); The inner diameter of the first coal retaining cylinder (4) gradually decreases from top to bottom.

2. The flexible connection structure of the coal drop pipe according to claim 1, characterized in that: Also includes: A second flexible stopper (7), wherein the outer surface of the second flexible stopper (7) is fixedly connected to the inner surface of the second coal stopper barrel (5), and the inner surface of the second coal stopper block is in sealing contact with the outer surface of the first coal stopper barrel (4).

3. The flexible connection structure of the coal drop pipe according to claim 2 is characterized in that: The upper surface of the second flexible stopper (7) matches the lower surface of the first flexible stopper (6), and the distance L between the upper surface of the second flexible stopper (7) and the lower surface of the second flexible stopper (7) is less than the minimum amplitude A. The minimum amplitude A is the minimum value of the change in the distance between the lower surface of the first flange (101) and the upper surface of the second flange (201) caused by the vibration of the upper coal pipe (1) and the lower coal pipe (2) during coal transportation.

4. The flexible connection structure of the coal drop pipe according to claim 2, characterized in that: The first flexible stopper (6) and the second flexible stopper (7) are made of rubber.

5. The flexible connection structure of the coal drop pipe according to any one of claims 1 to 3, characterized in that: The connecting cloth (3) is a dense cloth.

6. The flexible connection structure of the coal drop pipe according to claim 4, characterized in that: The connecting cloth (3) is a dense cloth.

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