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 gas sealing device for a rotating furnace body. The gas sealing device for a rotating furnace body comprises a fixing ring (1) and a sealing assembly (2) clamped on the fixing ring (1), wherein the fixing ring (1) is fixedly connected to the end of a rotating furnace body (6), and the sealing assembly (2) is sealingly fixed on an adjacent mechanism (7) of the rotating furnace body (6). The sealing assembly (2) comprises a clamping piece A (21) and a clamping piece B (22), wherein the clamping piece A (21) is located on one side of the rotating furnace body (6), and the clamping piece B (22) is located on one side of the adjacent mechanism (7). At least one circle of sealing strips (3) are arranged on the planes of the clamping piece A (21) and the clamping piece B (22) opposite to the fixing ring (1), and a cavity (4) is formed between the connection between the rotating furnace body and the adjacent mechanism and the clamping piece A (21) and the clamping piece B (22). The present invention 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 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, application number 201510072445.5, which provides sealing strips on two relatively rotating contact surfaces to prevent gas exchange. Summary of the invention

[0004] The object of the present invention is to overcome the deficiencies of the prior art and to provide a 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 gas sealing device for a rotating furnace body comprises a fixing ring and a sealing assembly clamped on the fixing ring, wherein the fixing ring is fixedly connected to the end of the rotating furnace body, the sealing assembly is sealingly fixed to an adjacent mechanism of the rotating furnace body, the sealing assembly comprises a clamping piece A and a clamping piece B, the clamping piece A is located on one side of the rotating furnace body, the clamping piece B is located on one side of the adjacent mechanism, at least one circle of sealing strips are arranged on the planes of the clamping pieces A and B opposite to the fixing ring, and a cavity is formed at the connection between the rotating furnace body and the adjacent mechanism and between the clamping pieces A and B.

[0007] The fixing ring is fixedly connected to the end of the rotating furnace body and rotates with the rotating furnace body. The sealing assembly is sealed and fixed to the adjacent mechanism by welding or other means, so the fixing ring can rotate relatively in the sealing assembly. The upper sealing strips on the clamping pieces A and B are tightly attached to the two sides of the fixing ring. After the cavity is formed between the connection between the rotating furnace body and the adjacent mechanism and the clamping pieces A and B, the gas must pass through all the upper sealing strips on the clamping pieces A and B to complete the exchange, thereby ensuring the sealing effect.

[0008] As an improvement, the fixing ring is welded to the end of the rotating furnace body.

[0009] As an improvement, the sealing strip protrudes from the outer surfaces of the clamping piece A and the clamping piece B.

[0010] As a further improvement, the sealing assembly includes a clamping piece connecting member, the clamping piece connecting member is located between the clamping piece A and the clamping piece B, and the clamping piece connecting member is provided with a pore 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.

[0011] As an improvement, the sealing assembly includes a pressing assembly, which is used to apply a continuous elastic compressive force to the sealing strip. After the sealing strip is worn by the fixing ring, it can still be pressed tightly against the surface of the fixing ring.

[0012] 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 plates A and B are provided with through holes for the push rod to pass through, and the push rod passes through the through holes and then abuts against the sealing strip.

[0013] As an improvement, the sealing strip is a graphite packing.

[0014] Compared with the invention with application number 201510072445.5, the present invention can provide sealing strips on both sides of the fixed ring, and the gas needs to pass through all the sealing strips before the exchange is completed, thus realizing multi-level sealing and ensuring the sealing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the present invention in use;

[0016] Figure 2 for Figure 1 The enlarged view of the middle A part shows the route that the external gas must take to enter the rotary furnace body;

[0017] Figure 3 It is a structural schematic diagram of the present invention;

[0018] Figure 4 Schematic diagram of the distribution of through holes on the clamping sheet B of the present invention.

[0019] In the figure: 1. fixing ring; 2. sealing assembly; 21. clamping piece A; 22. clamping piece B; 23. clamping piece connecting piece; 231. air hole; 24. clamping assembly; 241. sleeve; 242. push rod; 243. spring; 3. sealing strip; 4. cavity; 5. through hole; 6. rotating furnace body; 7. adjacent mechanism. DETAILED DESCRIPTION

[0020] Example 1

[0021] like Figure 1-3As shown, the gas sealing device for a rotating furnace body of the present invention comprises a fixing ring 1 and a sealing assembly 2 clamped on the fixing ring 1. The sealing assembly 2 is sealingly fixed on an adjacent mechanism 7 of a rotating furnace body 6, and the sealing assembly 2 and the adjacent mechanism 7 can be connected by welding or other connection methods that are not easy to cause gas leakage.

[0022] 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 6, and the clamping piece B22 is located on one side of the adjacent mechanism 7. At least one circle of sealing strip 3 is arranged on the planes of the clamping piece A21 and the clamping piece B22 opposite to the fixing ring 1. The sealing strip 3 is a graphite packing. The sealing strip 3 protrudes from the outer surface of the clamping piece A21 and the clamping piece B22. A cavity 4 is formed between the connection between the rotating furnace body and the adjacent mechanism, the clamping piece A21, and the clamping piece B22.

[0023] The sealing assembly 2 includes a clamping piece connecting member 23 , which is located between the clamping piece A 21 and the clamping piece B 22 . The clamping piece connecting member 23 is provided with an air hole 231 for communicating with an inert gas source.

[0024] The sealing assembly 2 includes a clamping assembly 24, which is used to apply a continuous elastic compressive force to the sealing strip 3. 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 piece A21 and the clamping piece B22 are provided with a through hole 5 for the push rod 242 to pass through. The push rod 242 passes through the through hole 5 and then abuts against the sealing strip 3.

[0025] The fixing ring 1 is annular, welded on the outer circumference of the end of the rotating furnace body 6, and is arranged vertically with the rotating furnace body 6. The sealing component 2 is annular as a whole, sleeved on the fixing ring 1, and the clamping piece B22 of the sealing component 2 is welded to the adjacent mechanism 7 or other methods that are not easy to cause gas leakage. The clamping component 24 is arranged on the sealing component 2. Figure 4 As shown, one through hole 5 corresponds to one clamping assembly 24, and the number of the clamping assemblies 24 can be increased or decreased as needed.

[0026] In order to adapt to the thermal expansion and contraction of the rotating furnace body 6, generally, one of the two ends of the rotating furnace body 6 is set as a fixed end and the other is set as a telescopic end. The fixed end prohibits the rotating furnace body 6 from axial extension, while the telescopic end allows the rotating furnace body 6 to axially extend. The invention is mainly used for sealing the fixed end of the rotating furnace body and the connection between the adjacent mechanism.

Claims

1. A gas sealing device for a rotating furnace body, comprising a fixing ring (1) and a sealing assembly (2) clamped on the fixing ring (1), wherein the fixing ring (1) is fixedly connected to an end of a rotating furnace body (6), the sealing assembly (2) is sealingly fixed on an adjacent mechanism (7) of the rotating furnace body (6), the sealing assembly (2) comprises a clamping piece A (21), a clamping piece B (22), a clamping piece connecting piece (23), and a pressing assembly (24), the clamping piece A (21) is located on one side of the rotating furnace body (6), and the clamping piece B (22) is located on one side of the adjacent mechanism (7), characterized in that: The clamping piece A (21) and the clamping piece B (22) are each provided with at least one circle of sealing strips (3) on a plane opposite to the fixing ring (1), and two circles of sealing strips (3) are provided on one of the opposite planes; the pressing assembly (24) is used to apply a continuous elastic pressure force to the sealing strips (3); and the pressing assembly (24) is only provided for one of the circles of sealing strips (3) on the opposite planes of the two circles of sealing strips (3); a closed cavity (4) is formed between the clamping piece connecting piece (23), the clamping piece A (21), and the clamping piece B (22), so that the gas must pass through the clamping piece. The clamping piece (23) is provided with an air hole (231) for communicating with an inert gas source; 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 piece A (21) and the clamping piece B (22) are provided with a through hole (5) for the push rod (242) to pass through; the push rod (242) passes through the through hole (5) and abuts against the sealing strip (3).

2. The gas sealing device for a rotary furnace according to claim 1, characterized in that: The fixing ring (1) is welded to the end of the rotating furnace body (6).

3. The gas sealing device for a rotary furnace according to claim 1, characterized in that: The sealing strip (3) protrudes from the outer surfaces of the clamping piece A (21) and the clamping piece B (22).

4. The gas sealing device for a rotary furnace according to claim 1, characterized in that: The sealing strip (3) is a graphite packing.

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