Sealing device for feed opening of airlock feeder

By designing a sealing device for the air lock feeder outlet including an annular sealing gasket and a skin expansion joint, the air leakage and wear problems at the connection between the air lock feeder and the inlet grinder are solved, and the sealing effect is improved and the number of maintenance is reduced, ensuring the stable operation of the mill.

CN222872378UActive Publication Date: 2025-05-16QINGHAI QILIANSHAN CEMENT CO LTD
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Patent Information

Application Number
CN202420483776.2
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-03-13
Publication Date
2025-05-16
Estimated Expiration
2034-03-13

AI Technical Summary

Technical Problem

The sealing method of the existing air lock feeder connection between the feed port and the inlet grinder has air leakage and wear problems, resulting in changes in negative pressure and unstable silo weight fluctuations, and may cause blockage of the inlet grinder, affecting the continuous and stable operation of the mill.

Method used

A sealing device including a feeding port, a slip connection port, a sealing gasket and a skin expansion joint is designed. It is fixed to the slip connection port with a fixed pressure plate and bolts through an annular sealing gasket to avoid negative pressure from sucking away the sealing gasket, and is fixed to the support plate through a skin expansion joint to avoid wear.

Benefits of technology

It effectively avoids the air leakage problem of the sealing gasket being sucked away, reduces the wear of the skin expansion joint, reduces the number of repairs and replacements, and ensures the continuous, stable and efficient operation of the raw material grinding.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model discloses an airlock feeder feed opening sealing device which comprises a feed opening, a scraper-trough conveyer connecting port, a sealing gasket and a skin expansion joint, an annular groove-shaped supporting plate is arranged on the outer wall of the feed opening, an annular baffle is arranged on the inner wall of the scraper-trough conveyer connecting port, the annular sealing gasket is arranged on the baffle, and the skin expansion joint is connected with the scraper-trough conveyer connecting port. The sealing gasket is tightly pressed through an annular fixing pressing plate, the sealing gasket is fixed between the baffle and the fixing pressing plate through bolts, and the sealing gasket makes contact with the outer wall of the discharging opening; one end of the skin expansion joint is fixed outside the supporting plate; and the other end of the skin expansion joint is fixed on the outer wall of the scraper-trough conveyer connector. The annular sealing gasket is arranged on the outer side of the discharging port and fixed to the scraper-trough conveyer connecting port through the fixing pressing plate and the bolt, and the sealing gasket is effectively prevented from being sucked away by internal negative pressure; the skin expansion joint is supported through the supporting plate and is spaced from the discharging opening by a certain distance, abrasion of the skin expansion joint can be effectively avoided, the frequency of maintenance and replacement is reduced, and the problem of air leakage is solved.
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Description

Technical Field

[0001] The utility model relates to the technical field of tunnel engineering, in particular to a sealing device for a feed opening of an air-locking feeder. Background Art

[0002] Since the mill inlet chute is in a shaking state when the vertical mill is running, and the air-locking feeder discharge port is in a fixed state, the connection between the air-locking feeder discharge port and the mill inlet chute can only be a soft connection.

[0003] At present, the air-locking feeder discharge port and the grinding chute are connected by a sealing method of filling in the sealing groove or a bellows connection. Since the internal negative pressure at this position is above -200pa, the filling in the sealing groove is easily sucked away, resulting in sealing failure and serious air leakage; the bellows seal is directly connected to the pipe mouth. It is seriously worn and needs frequent maintenance and replacement;

[0004] The weight fluctuation of the small bin of the air-locking feeder is large. When the discharge port of the air-locking feeder leaks air, the negative pressure of the small bin becomes smaller, thus affecting the weight fluctuation of the small bin. When the discharge port of the air-locking feeder leaks air, the cold air is sucked into the mill chute. When the material has high moisture and viscosity, it is easy to cause the material to stick to the mill chute, resulting in the chute being blocked and the mill being chained and stopped, which seriously affects the continuous and stable operation of the mill. Utility Model Content

[0005] The utility model aims to solve the shortcomings in the prior art and proposes a sealing device for a feed opening of an air-locking feeder.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A sealing device for a feed port of an air-locking feeder comprises a feed port, a chute connection port, a sealing gasket and a skin expansion joint, wherein a support plate in the shape of an annular groove is arranged on the outer wall of the feed port, an annular baffle is arranged on the inner wall of the chute connection port, an annular sealing gasket is arranged on the baffle, the sealing gasket is pressed by an annular fixed pressure plate, and the sealing gasket is fixed between the baffle and the fixed pressure plate by bolts, and the sealing gasket contacts the outer wall of the feed port; one end of the skin expansion joint is fixed to the outer side of the support plate; the other end of the skin expansion joint is fixed to the outer wall of the chute connection port.

[0008] One end of the skin expansion joint is pressed against the outside of the support plate by a pressure plate A, and the end of the skin expansion joint is fixed between the support plate and the pressure plate A by bolts; the other end of the skin expansion joint is pressed against the outer wall of the chute connection port by a pressure plate B, and the other end of the skin expansion joint is fixed between the outer wall of the chute connection port and the pressure plate B by bolts.

[0009] The diameter of the material discharge port is smaller than the diameter of the chute connecting port; the material discharge port is sleeved in the chute connecting port.

[0010] The outer side wall of the support plate is flush with the outer side wall of the chute connection port.

[0011] The support plate is connected to the outer wall of the feed opening by welding.

[0012] The baffle is connected to the inner wall of the chute connection port by welding.

[0013] The beneficial effects of the utility model are:

[0014] The annular sealing gasket is arranged on the outside of the discharge port and fixed to the chute connection port by a fixed pressure plate and bolts, which effectively prevents the sealing gasket from being sucked away by the internal negative pressure; the skin expansion joint is supported by a support plate and spaced a certain distance from the discharge port, which can effectively avoid the wear of the skin expansion joint, reduce the number of maintenance and replacement, solve the air leakage problem, and ensure the continuous, stable and efficient operation of the raw mill. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a cross-sectional structural diagram of the utility model;

[0016] In the figure: 1. Feeding port; 11. Support plate; 12. Pressure plate A; 2. Chute connection port; 21. Baffle; 22. Fixed pressure plate; 23. Pressure plate B; 3. Sealing gasket; 4. Skin expansion joint; 5. Bolts. DETAILED DESCRIPTION

[0017] Example 1

[0018] like Figure 1 As shown, the utility model provides a sealing device for a feed port of an air-locking feeder, and its structure is as follows: it includes a feed port 1, a chute connection port 2, a sealing gasket 3 and a skin expansion joint 4, a support plate 11 in the shape of an annular groove is arranged on the outer wall of the feed port 1, a ring-shaped baffle plate 21 is arranged on the inner wall of the chute connection port 2, an annular sealing gasket 3 is arranged on the baffle plate 21, the sealing gasket 3 is pressed by an annular fixed pressure plate 22, and the sealing gasket 3 is fixed between the baffle plate 21 and the fixed pressure plate 22 by bolts 5, and the sealing gasket 3 contacts the outer wall of the feed port 1; one end of the skin expansion joint 4 is fixed to the outside of the support plate 11; the other end of the skin expansion joint 4 is fixed to the outer wall of the chute connection port 2.

[0019] One end of the skin expansion joint 4 is pressed against the outside of the support plate 11 by a pressure plate A12, and the end of the skin expansion joint 4 is fixed between the support plate 11 and the pressure plate A12 by a bolt 5; the other end of the skin expansion joint 4 is pressed against the outer wall of the chute connection port 2 by a pressure plate B23, and the other end of the skin expansion joint 4 is fixed between the outer wall of the chute connection port 2 and the pressure plate B23 by a bolt 5.

[0020] The diameter of the material discharge port 1 is smaller than the diameter of the chute connecting port 2; the material discharge port 1 is sleeved in the chute connecting port 2.

[0021] The outer side wall of the support plate 11 is flush with the outer side wall of the chute connection port 2 .

[0022] The support plate 11 is connected to the outer wall of the feed opening 1 by welding.

[0023] The baffle 21 is connected to the inner wall of the chute connection port 2 by welding.

[0024] Specifically, the annular sealing gasket 3 is arranged on the outside of the discharge port 1 and is fixed to the chute connection port 2 by a fixed pressure plate 22 and a bolt 5, which effectively prevents the internal negative pressure from sucking away the sealing gasket 3; the skin expansion joint 4 is supported by a support plate 11 and is spaced a certain distance from the discharge port 1, which can effectively avoid the wear of the skin expansion joint 4, reduce the number of maintenance and replacement, and solve the air leakage problem.

Claims

1. A sealing device for a feed opening of an air-lock feeder, characterized in that: It includes a feed port, a chute connection port, a sealing gasket and a skin expansion joint. A supporting plate in the shape of an annular groove is arranged on the outer wall of the feed port, an annular baffle is arranged on the inner wall of the chute connection port, an annular sealing gasket is arranged on the baffle, the sealing gasket is pressed by an annular fixed pressure plate, and the sealing gasket is fixed between the baffle and the fixed pressure plate by bolts, and the sealing gasket is in contact with the outer wall of the feed port; one end of the skin expansion joint is fixed to the outer side of the supporting plate; the other end of the skin expansion joint is fixed to the outer wall of the chute connection port.

2. The sealing device for the feed opening of an air lock feeder according to claim 1, characterized in that: One end of the skin expansion joint is pressed against the outside of the support plate by a pressure plate A, and the end of the skin expansion joint is fixed between the support plate and the pressure plate A by bolts; the other end of the skin expansion joint is pressed against the outer wall of the chute connection port by a pressure plate B, and the other end of the skin expansion joint is fixed between the outer wall of the chute connection port and the pressure plate B by bolts.

3. The sealing device for the feed opening of an air lock feeder according to claim 2, characterized in that: The diameter of the material discharge port is smaller than the diameter of the chute connecting port; the material discharge port is sleeved in the chute connecting port.

4. The sealing device for the feed opening of an air lock feeder according to claim 3, characterized in that: The outer side wall of the support plate is flush with the outer side wall of the chute connection port.

5. The sealing device for the feed opening of an air lock feeder according to claim 4, characterized in that: The support plate is connected to the outer wall of the feed opening by welding.

6. The sealing device for the feed opening of an air lock feeder according to claim 5, characterized in that: The baffle is connected to the inner wall of the chute connection port by welding.