Sealing structure for feed port of powder tank car

Abstract

The utility model discloses a sealing structure for a feeding port of a powder tank car, and relates to the technical field of sealing structures of feeding ports. The sealing structure for the feeding port of the powder tank car comprises a tank car body, a feeding port connector and a sealing cover, the sealing cover is connected with the feeding port connector, and the feeding port connector is connected to the feeding port of the tank car body through a flange; a limiting clamping ring is fixed to the outer wall of the feeding port connector, and a groove in the circumferential direction is formed in the middle of the limiting clamping ring. The lower end of the sealing cover is rotationally connected with a pressing device, the pressing device comprises a rotating handle and a limiting convex block, the rotating handle and the limiting convex block are of an integrated structure, and when the sealing cover covers the feeding port connector in a buckled mode, the limiting convex block is automatically clamped in the groove due to the fact that the limiting convex block is touched by the limiting clamping ring to rotate; the rotating handle is rotated downwards, the limiting protruding block abuts against the groove, and the sealing cover moves upwards to be separated from the feeding port connector.

Description

Technical Field

[0001] The utility model relates to the technical field of sealing structures of feed ports, in particular to a sealing structure for a feed port of a powder tank truck. Background Art

[0002] At present, the feeding port of the powder tank truck is mostly a claw-type manhole cover. Since the tank is under positive pressure when the tank truck is unloading, the powder will enter the actuator of the manhole cover, affecting the opening and closing of the manhole cover. After long-term use, the actuator will be damaged inside, causing the manhole cover to leak. This claw-type manhole cover has a short service life. If leakage occurs during use, it will affect environmental hygiene, is difficult to handle, requires a large workload, and poses a major safety hazard.

[0003] The utility model with announcement number CN217249621U discloses a feeding port sealing device for a ball mill, including a feeding port, a feeding end cover, bolts, an end liner, a wedge key and a sealing ring. The feeding pipe is inserted into the feeding port of the ball mill, a sealing ring is arranged at the sealing port of the bushing, and a wedge key is arranged at the sealing port of the bushing as a supporting point of the contact surface between the bushing and the end cover, and is fixed and welded with an inclined iron to prevent the bushing from changing the concentricity due to the influence of external force, playing a double prevention role, mainly playing a sealing role to prevent the slurry from entering the bushing and the feeding port. However, the sealing device does not have the problem of powder entering the manhole cover actuator due to the positive pressure in the tank, and cannot solve the problems of short service life and leakage of the manhole cover of the feeding port of the above-mentioned powder tank truck. Utility Model Content

[0004] In order to solve the above technical problems, the utility model provides a sealing structure for a feed port of a powder tank truck, which prolongs the service life of a sealing cover.

[0005] To achieve this technical purpose, the utility model adopts the following scheme: a sealing structure for the feed port of a powder tank truck, comprising a tank truck body, a feed port joint and a sealing cover, the sealing cover is connected to the feed port joint, and the feed port joint flange is connected to the feed port of the tank truck body; a limiting clamp is fixed to the outer wall of the feed port joint, and the middle part of the limiting clamp is a groove in the circumferential direction; a clamp is rotatably connected to the lower end of the sealing cover, and the clamp comprises a rotating handle and a limiting protrusion, and the rotating handle and the limiting protrusion are an integrated structure, and when the sealing cover is buckled on the feed port joint, the limiting protrusion is touched and rotated by the limiting clamp and automatically clamped in the groove; the rotating handle is turned downward, the limiting protrusion presses the groove, and the sealing cover moves upward to disengage from the feed port joint; the inner end surface of the sealing cover in contact with the feed port joint is provided with a first sealing gasket.

[0006] Compared with the prior art, the utility model has the following beneficial effects: the utility model is suitable for sealing the feed port of a powder tank truck with a positive pressure environment. By setting a limit clamp on the feed port joint, it is used in conjunction with the limit convex block on the sealing cover, and the sealing cover is tightened and loosened by rotating the rotating handle: the sealing cover is buckled on the feed port joint, and the inner wall of the limit convex block and the groove are perfectly complementary to achieve sealing; the rotating handle is turned downward, and the lower part of the limit convex block presses against the groove, and the sealing cover is pushed upward and detached from the feed port joint. In the past, the sealing cover actuator used in tank trucks was exposed to the outside, and the powder would enter the actuator when the tank truck was unloading. The rotating mechanism would be worn out after long-term use, and the sealing part would leak, affecting the service life. Compared with the previous sealing methods, the sealing method of the feed port of the tank truck has a sealing gasket inside the sealing cover. When the sealing cover is pressed, the sealing cover and the feed port are sealed by the sealing gasket, and the powder will not enter other parts when the tank truck is unloading. Therefore, this solution can effectively extend the service life of the tank truck sealing cover, improve environmental hygiene, reduce the labor intensity of employees, and eliminate safety hazards in the operation process.

[0007] The preferred embodiment of the present utility model is:

[0008] The limiting protrusion includes two arc surfaces, the first arc surface is complementary to the groove of the limiting clamp ring, the second arc surface is located at the lower side of the first arc surface, and the second arc surface is convex than the first arc surface.

[0009] The upper end surface of the sealing cover is connected with a handle for easy taking.

[0010] A second sealing gasket is sandwiched between the feed port joint and the feed port of the tank truck body to increase the sealing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 A schematic diagram of a sealing structure for a feed port of a powder tank truck provided in an embodiment of the utility model;

[0012] Figure 2 A schematic diagram of the structure of the feed port connector provided by an embodiment of the utility model;

[0013] Figure 3 A schematic diagram of the structure of the sealing cover provided in an embodiment of the utility model;

[0014] Markings in the figure are: 1. Tank truck body; 2. First flange; 3. Second sealing gasket; 4. Second flange; 5. Bolt; 6. Feed port joint; 61. Limit clamp; 7. Presser; 71. Turning handle; 72. Limiting protrusion; 721. First arc surface; 722. Second arc surface; 8. First sealing gasket; 9. Sealing cover; 10. Handle. DETAILED DESCRIPTION

[0015] In order to fully understand the purpose, features and effects of the present invention, the present invention is described in detail through the following specific implementation methods, but the present invention is not limited thereto.

[0016] See also Figure 1 The utility model provides a sealing structure for a feed port of a powder tank truck, comprising a tank truck body 1, a feed port joint 6 and a sealing cover 9. The tank truck body 1 is provided with a feed port, a first flange 2 is welded at the feed port, a second flange 4 is fixed to the lower end of the feed port joint 6, the second flange 4 is connected to the first flange 2 by bolts 5, and a second sealing gasket 3 is clamped between the second flange 4 and the first flange 2.

[0017] See also Figure 2 A limit clamp ring 61 is fixed on the middle outer wall of the feed port connector 6, and a circumferential groove is provided on the side wall of the limit clamp ring 61 for connecting the sealing cover 9. A first sealing gasket 8 is provided on the inner end surface of the sealing cover 9, and the first sealing gasket 8 contacts the upper end surface of the feed port connector 6; a presser 7 is rotatably connected to the lower side wall of the sealing cover 9.

[0018] See also Figure 3 The clamp 7 is divided into a rotating handle 71 and a limiting protrusion 72. The rotating handle 71 and the limiting protrusion 72 are an integral structure. The rotating handle 71 and the limiting protrusion 72 are respectively located on both sides of the rotating shaft. The limiting protrusion 72 includes two arc surfaces. The cross-sectional arc line of the first arc surface 721 is complementary to the cross-sectional arc line of the groove of the limiting clamp ring 61. The lower side of the first arc surface 721 extends a second arc surface 722, and the second arc surface 722 is convex to the first arc surface 721. Based on the structure of the limiting protrusion 72, when the sealing cover 9 is not in use, the positions of the rotating handle 71 and the limiting protrusion 72 are arbitrary. During the process of buckling the sealing cover 9, the limiting protrusion 72 contacts the limiting clamp ring 61 to limit the rotation angle of the limiting protrusion 72 and the rotating handle 71. When the limiting protrusion 72 is stuck in the groove, the first arc surface 721 of the limiting protrusion 72 fits perfectly with the groove, realizing the sealing connection between the sealing cover 9 and the feed port joint 6. When it is necessary to remove the sealing cover 9, the rotating handle 71 is turned downward, and the second arc surface 722 of the limiting protrusion 72 contacts the groove. Since the second arc surface 722 is more convex than the first arc surface 721, the second arc surface 722 pushes the sealing cover 9 outward and upward, and the sealing cover 9 is separated from the feed port joint 6, and the sealing cover 9 is removed. It should be noted that the rotation axis position of the limiting protrusion 72 is determined according to the actual curvature of the groove, and those skilled in the art can adjust the rotation axis position according to the functional requirements of tightening and loosening.

[0019] In some preferred embodiments, a handle 10 may be fixed on the upper end of the sealing cover 9 to facilitate taking the sealing cover 9 .

[0020] Instructions for use: When sealing is required, snap the sealing cover 9 onto the feed port joint 6, and quickly install it by switching the tightener 7 to achieve the purpose of sealing the feed port of the tank truck; when opening the sealing cover 9, press and rotate the handle 71 downward, hold the handle 10, and easily remove the sealing cover 9.

[0021] Finally, it should be noted that the above-listed examples are only preferred embodiments of the present invention. Of course, those skilled in the art can make changes and modifications to the present invention. If these modifications and modifications fall within the scope of the claims of the present invention and their equivalent technologies, they should be considered to be within the scope of protection of the present invention.

Claims

1. A sealing structure for a feed port of a powder tank truck, comprising a tank truck body, a feed port joint and a sealing cover, wherein the sealing cover is connected to the feed port joint, and the feed port joint flange is connected to the feed port of the tank truck body; characterized in that: A limit clamp ring is fixed on the outer wall of the feed port joint, and the middle part of the limit clamp ring is a groove in the circumferential direction; The lower end of the sealing cover is rotatably connected with a clamp, which includes a rotating handle and a limiting protrusion. The rotating handle and the limiting protrusion are an integrated structure. When the sealing cover is buckled on the feed inlet joint, the limiting protrusion is touched and rotated by the limiting clamp ring and automatically clamped in the groove; when the rotating handle is turned downward, the limiting protrusion presses the groove, and the sealing cover moves upward to separate from the feed inlet joint; The inner end surface of the sealing cover in contact with the feed port joint is provided with a first sealing gasket.

2. The sealing structure for the feed port of a powder tank truck according to claim 1, characterized in that: The limiting protrusion includes two arc surfaces, the first arc surface is complementary to the groove of the limiting clamp ring, the second arc surface is located at the lower side of the first arc surface, and the second arc surface is convex than the first arc surface.

3. The sealing structure for the feed port of a powder tank truck according to claim 1, characterized in that: The upper end surface of the sealing cover is connected with a handle.

4. The sealing structure for the feed port of a powder tank truck according to claim 1, characterized in that: A second sealing gasket is clamped between the feed port joint and the feed port of the tank truck body.

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