New gas sealing device for rotating furnace

Abstract

The present invention relates to the technical field of surface sealing for relative motion, and in particular to a novel gas sealing device for a rotating furnace body. The novel gas sealing device for a rotating furnace body comprises a fixing ring (1), a sealing assembly (2), and a stopper (3). The fixing ring (1) is fixedly connected to the end of a rotating furnace body (8). The sealing assembly (2) comprises a clamping piece A (21) and a clamping piece B (22). The clamping piece A (21) is located on one side of the rotating furnace body (8), and the clamping piece B (22) is located on the side of an adjacent mechanism (9) of the rotating furnace body (8). An upper sealing strip (41) is provided on a plane opposite to the fixing ring (1) of the clamping piece A (21) and / or the clamping piece B (22) to achieve radial sealing. A lower sealing strip (42) is provided at the bottom of the clamping piece B (22) to abut against the adjacent mechanism (9) to achieve axial sealing. The anti-gas exchange device has a good sealing effect.

Description

Technical Field

[0001] The invention relates to the technical field of relative motion surface sealing, and in particular to a novel gas sealing device for a rotating furnace body. Background Art

[0002] Under certain working conditions, it is necessary to prevent internal gas leakage from the connection between the rotary furnace body and adjacent mechanisms or the entry of external gas. For example, in the field of pyrolysis desorption, a gas exchange prevention device must be installed at the connection between the rotary carbonization furnace and its adjacent mechanisms. Once external gas enters the rotary carbonization furnace from the connection, not only will the oxygen-deficient environment in the carbonization furnace be destroyed, but the pyrolysis gas may explode under the action of oxygen.

[0003] The applicant has applied for a sealing mechanism to prevent gas exchange, with application number 201510072445.5. This scheme achieves the purpose of preventing gas exchange by implementing axial sealing and radial sealing at the joint. After repeated use by the applicant, the following problems were found: (1) When the rotating furnace body is in operation, it constantly rubs against the axial sealing strip and the radial sealing strip at the same time. After the radial sealing strip is worn, the gas cannot pass through it due to the existence of the clamping mechanism, but there is no remedial measure after the axial sealing strip is worn, so the axial sealing strip needs to be replaced frequently, otherwise it will affect the sealing effect; (2) Due to the existence of thermal expansion and contraction, the rotating furnace body will expand under high temperature conditions, and the force on the radial sealing strip will increase dramatically, thereby accelerating the wear of the sealing strip. In severe cases, the rotating furnace body will stop rotating. Summary of the invention

[0004] The object of the present invention is to overcome the deficiencies of the prior art and provide a novel gas sealing device for a rotary furnace body, which has a better sealing effect on the connection between the rotary furnace body and adjacent mechanisms.

[0005] In order to achieve the above object, the technical solution of the present invention is as follows:

[0006] A novel gas sealing device for a rotating furnace body comprises a fixing ring, a sealing component clamped on the fixing ring, and a limiter for limiting the rotation of the sealing component. The fixing ring is fixedly connected to the end of the rotating furnace body. The sealing component comprises a clamping piece A and a clamping piece B. The clamping piece A is located on one side of the rotating furnace body, and the clamping piece B is located on the side of an adjacent mechanism of the rotating furnace body. An upper sealing strip is arranged on the plane of the clamping piece A and / or the clamping piece B opposite to the fixing ring to achieve radial sealing. A lower sealing strip is arranged at the bottom of the clamping piece B to abut against the adjacent mechanism to achieve axial sealing.

[0007] The fixing ring is fixedly connected to the end of the rotating furnace body and rotates with the rotating furnace body. The sealing component clamped on the fixing ring can only move axially and will not rotate with the rotating furnace body. The upper sealing strips on the clamping pieces A and B are tightly attached to the two sides of the fixing ring, realizing multi-stage sealing in the radial direction. In the axial sealing, the lower sealing strip at the bottom of the clamping piece B does not rub against the contact surface against the adjacent mechanism, so that no wear occurs on the contact surface, thereby ensuring the axial sealing effect.

[0008] On the other hand, when the rotary furnace body expands and contracts, the sealing component can move axially accordingly. The thermal expansion and contraction of the rotary furnace body will not affect the force of the upper sealing strip, which is beneficial to increasing the service life of the sealing strip and also beneficial to the normal operation of the rotary furnace body.

[0009] The upper sealing strip refers to the sealing strip that only contacts the fixed ring, and the lower sealing strip refers to the sealing strip that mainly contacts the adjacent mechanism.

[0010] As an improvement, the fixing ring is welded to the end of the rotating furnace body.

[0011] As an improvement, the upper sealing strip protrudes from the outer surface of the clamping piece A and / or the clamping piece B.

[0012] As an improvement, the sealing assembly includes a clamping piece connecting member, which is located between the clamping piece A and the clamping piece B, and a cavity is formed between the clamping piece connecting member, the clamping piece A, and the clamping piece B. After the cavity is formed, the gas must pass through all the upper sealing strips on the clamping pieces A and B to complete the exchange.

[0013] As a further improvement, the clamping piece connector is provided with a gas hole for communicating with an inert gas source. After the cavity is filled with inert gas, the gas in the rotary furnace body can be further prevented from exchanging with the outside air.

[0014] As an improvement, the sealing assembly includes a pressing assembly, which is used to apply a continuous elastic compressive force to the upper sealing strip. After the upper sealing strip is worn by the fixing ring, it can still be pressed tightly against the surface of the fixing ring.

[0015] As a further improvement, the clamping assembly includes a sleeve, a push rod threadedly connected to the sleeve, and a spring sleeved on the push rod. The clamping plate A and / or the clamping plate B are provided with a through hole for the push rod to pass through, and the push rod passes through the through hole and then abuts against the upper sealing strip.

[0016] As a further improvement, the lower sealing strip abuts against the fixing ring.

[0017] As an improvement, the clamping piece B is provided with a spiral push rod for pushing the lower sealing strip toward the fixing ring.

[0018] As an improvement, the limiting member is a rod member arranged parallel to the axis of the rotating furnace body, and a recess is provided on the clamping piece B. The rod member is stuck in the recess to prevent the sealing assembly from rotating.

[0019] Compared with the invention with application number 201510072445.5, the lower sealing strip of the present invention no longer generates rotational friction, thereby ensuring axial sealing. The upper sealing strips on the clamping pieces A and B achieve multi-level sealing, thereby ensuring radial sealing. The present invention has a better sealing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the present invention in use;

[0021] Figure 2 for Figure 1 Enlarged view of part A in the middle;

[0022] Figure 3 It is a structural schematic diagram of the present invention;

[0023] Figure 4 It is a schematic diagram of the distribution of through holes and recesses on the clamping sheet B of the present invention.

[0024] In the figure: 1. fixing ring; 2. sealing assembly; 21. clamping piece A; 22. clamping piece B; 221. depression; 23. clamping piece connecting piece; 231. air hole; 24. pressing assembly; 241. sleeve; 242. push rod; 243. spring; 3. limiter; 41. upper sealing strip; 42. lower sealing strip; 43. asbestos packing; 5. cavity; 6. through hole; 7. screw push rod; 8. rotating furnace body; 9. adjacent mechanism. DETAILED DESCRIPTION

[0025] Example 1

[0026] like Figure 1-3 As shown, the novel gas sealing device for a rotating furnace body of the present invention comprises a fixing ring 1, a sealing component 2 clamped on the fixing ring 1, and a limiting member 3 for limiting the rotation of the sealing component 2.

[0027] The sealing assembly 2 includes a clamping piece A21 and a clamping piece B22. The clamping piece A21 is located on one side of the rotating furnace body 8, and the clamping piece B22 is located on the side of the adjacent mechanism 9 of the rotating furnace body 8. At least one circle of upper sealing strip 41 is arranged on the plane of the clamping piece A21 and the clamping piece B22 opposite to the fixing ring 1 to achieve radial sealing, and at least one circle of lower sealing strip 42 is arranged at the bottom of the clamping piece B22 to abut against the adjacent mechanism 9 to achieve axial sealing. The lower sealing strip 42 also abuts against the fixing ring 1 to assist in improving the radial sealing effect. The upper sealing strip 41 protrudes from the outer surface of the clamping piece A21 and the clamping piece B22. The upper sealing strip 41 and the lower sealing strip 42 are both graphite packings.

[0028] The sealing assembly 2 includes a clamping piece connector 23, which is located between the clamping piece A21 and the clamping piece B22, and a cavity 5 is formed between the clamping piece connector 23, the clamping piece A21, and the clamping piece B22. The clamping piece connector 23 is provided with a gas hole 231 for communicating with an inert gas source.

[0029] The sealing assembly 2 includes a clamping assembly 24, which is used to apply a continuous elastic compressive force to the upper sealing strip 41. The clamping assembly 24 includes a sleeve 241, a push rod 242 threadedly connected to the sleeve 241, and a spring 243 sleeved on the push rod. The clamping sheet A21 and / or the clamping sheet B22 are provided with a through hole 6 for the push rod 242 to pass through. The push rod 242 passes through the through hole 6 and then abuts against the upper sealing strip 41.

[0030] The clamping piece B22 is provided with a screw push rod 7 for pushing the lower sealing strip 42 toward the fixing ring 1. An asbestos packing 43 is also provided on one side of the lower sealing strip 42. By rotating the screw push rod 7, the asbestos packing 43 and the lower sealing strip 42 can be squeezed toward the fixing ring 1.

[0031] The limiting member 3 is a rod member arranged parallel to the axial direction of the rotating furnace body 8 . A recess 221 is formed on the clamping piece B22 . The rod member is clamped in the recess 221 to prevent the sealing assembly 2 from rotating.

[0032] The fixing ring 1 is annular, welded to the outer circumference of the end of the rotating furnace body 8, and is arranged vertically to the rotating furnace body 8. The sealing component 2 is annular as a whole, and is sleeved on the fixing ring 1. The pressing component 24 is arranged circumferentially on the sealing component 2. Figure 4 As shown, one through hole 6 corresponds to one clamping assembly 24, and one recess 221 corresponds to one stopper 3. The number of clamping assemblies 24 and stoppers 3 can be increased or decreased as needed.

[0033] In order to adapt to the thermal expansion and contraction of the rotating furnace body 8, generally, one of the two ends of the rotating furnace body 8 is set as a fixed end and the other is set as a telescopic end. The fixed end prohibits the rotating furnace body 8 from axial extension, while the telescopic end allows the rotating furnace body 8 to axial extension. The invention is mainly used for sealing the connection between the telescopic end of the rotating furnace body and the adjacent mechanism.

Claims

1. A new type of gas sealing device for the rotating furnace body, characterized by: It is used to seal the outer surface of the nested end of a rotating furnace body (8) and an adjacent component (9), and comprises a fixing ring (1), a sealing component (2) clamped on the fixing ring (1), and a limiter (3) for limiting the rotation of the sealing component (2). The fixing ring (1) is fixedly connected to the end of the rotating furnace body (8). The sealing component (2) comprises a clamping piece A (21) and a clamping piece B (22). The clamping piece A (21) is located on one side of the rotating furnace body (8). The clamping piece B (22) is annular and is arranged separately from the adjacent component (9). The clamping piece B (22) is assembled on the rotating furnace body. An upper sealing strip (41) is provided on the outer surface of the adjacent component (9) of the converter body (8) and on the plane where the clamping piece A (21) and / or the clamping piece B (22) are opposite to the fixing ring (1) to achieve radial sealing, and a lower sealing strip (42) is provided at the bottom of the clamping piece B (22) to abut against the adjacent component (9) to achieve axial sealing; the stopper (3) is a rod member arranged parallel to the axis of the rotating furnace body (8), and a recess (221) is provided on the clamping piece B (22), and the rod member is clamped in the recess (221) to prevent the sealing assembly (2) from rotating.

2. The novel gas sealing device for a rotary furnace as claimed in claim 1, characterized in that: The fixing ring (1) is welded to the end of the rotating furnace body (8).

3. The novel gas sealing device for a rotary furnace as claimed in claim 1, characterized in that: The upper sealing strip (41) protrudes from the outer surface of the clamping piece A (21) and / or the clamping piece B (22).

4. The novel gas sealing device for a rotary furnace as claimed in claim 1, characterized in that: The sealing assembly (2) comprises a clamping piece connecting member (23), wherein the clamping piece connecting member (23) is located between the clamping piece A (21) and the clamping piece B (22), and a cavity (5) is formed between the clamping piece connecting member (23), the clamping piece A (21), and the clamping piece B (22).

5. The novel gas sealing device for a rotary furnace as claimed in claim 4, characterized in that: The clamping piece connecting piece (23) is provided with an air hole (231) for communicating with an inert gas source.

6. The novel gas sealing device for a rotary furnace as claimed in claim 1, characterized in that: The sealing assembly (2) comprises a pressing assembly (24), and the pressing assembly (24) is used to apply a continuous elastic pressing force to the upper sealing strip (41).

7. The novel gas sealing device for a rotary furnace as claimed in claim 6, characterized in that: The clamping assembly (24) comprises a sleeve (241), a push rod (242) threadedly connected to the sleeve (241), and a spring (243) sleeved on the push rod. The clamping sheet A (21) and / or the clamping sheet B (22) are provided with a through hole (6) for the push rod (242) to pass through. After passing through the through hole (6), the push rod (242) abuts against the upper sealing strip (41).

8. The novel gas sealing device for a rotary furnace as claimed in claim 1, characterized in that: The lower sealing strip (42) abuts against the fixing ring (1).

9. The novel gas sealing device for a rotary furnace as claimed in claim 1, characterized in that: The clamping piece B (22) is provided with a screw push rod (7) for pushing the lower sealing strip (42) toward the fixing ring (1).

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