New type of tube plate extraction device

Abstract

This invention provides a novel tube plate pull-out device including a base and a top cover. The base includes a base cylinder whose internal cavity fits a hydraulic jack structure and a base support plate provided at the end of the base cylinder. The top cover includes a top cover cylinder whose internal cavity fits the base cylinder and a pull-out support plate provided at the end of the top cover cylinder. The movable end of the hydraulic jack is assembled in contact with the inner wall of the top cover cylinder. The extension and retraction of the hydraulic jack causes the base support plate and the pull-out support plate to move closer to and in contact with each other, or to move apart. This device is compact, has a simple and stable structure, is not easily restricted in use even in complex field work environments, and is highly adaptable as it can be replaced with hydraulic jacks of different specifications depending on various usage scenarios.

Description

Technical Field

[0001] The present invention relates to a drawing device for a new type of tube plate and belongs to the technical field of machinery equipment.

Background Art

[0002] In thermal power plants, in order to improve efficiency, the low-temperature reheater and the low-temperature superheater are usually arranged densely in multiple layers in the form of a serpentine tube plate in the flue at the rear of the boiler. However, with the continuous operation of the plant for a long time, various causes such as corrosion, erosion, and contact wear have led to more or less thinning of the pipes on the tube plate in the flue at the rear of the boiler.

[0003] Due to the design characteristics of the rear flue, the distance between the tube plates is usually narrow, and furthermore, positioning devices and vibration prevention devices are often installed on the suspension pipes and serpentine tube plates. Therefore, it is difficult to separate the tube plates using hands, bars, etc. during inspection and repair work. Conventionally, when inspecting and repairing the tube plates in the rear flue, more than two chain blocks are often used to pull the tube plates apart. However, for operations on a large number of tube plates, the use of chain blocks consumes a great deal of manpower and cost.

Summary of the Invention

[0004] The object of the present invention is to provide a drawing device for a new type of tube plate in order to solve the problems raised in the above background art.

[0005] The technical solution of the present invention is as follows.

[0006] The drawing device for a new type of tube plate is a base including a base cylinder body whose inner cavity conforms to the hydraulic jack structure and a base support plate provided at the end of the base cylinder body, and the base, A top cover comprising a top cover body whose inner cavity fits the base body, and a pull-out support plate provided at the end of the top cover body, A hydraulic jack, wherein the movable end of the hydraulic jack is in contact with the inner wall of the top cover cylinder and is assembled to the hydraulic jack, and the extension and retraction of the hydraulic jack causes the base support plate and the pull-out support plate to move closer to each other, into contact with each other, or to move further apart.

[0007] Preferably, a positioning groove extending along the extension and retraction direction of the hydraulic jack is provided on the side wall of the top cover cylinder, and a positioning pin slidably fitted into the positioning groove is provided on the outer wall of the base cylinder.

[0008] Preferably, the positioning pin is detachably screwed into the outer wall of the base cylinder.

[0009] Preferably, anti-slip patterns are provided on the sides of the base support plate and the drawer support plate that are separated from each other.

[0010] This invention has the following beneficial effects.

[0011] This device is compact, has a simple and stable structure, and can easily pass through boiler manholes, making it less restrictive to use even in complex on-site work environments. It also offers high adaptability, as it can be replaced with hydraulic jacks of different specifications to suit various usage scenarios.

[0012] The base and top cover support plates, through the thrust of the hydraulic jack, effectively widen the spacing between tube plates along the axial direction of the support plate, rather than acting on only one tube. This increases the number of tubes that can be inspected and repaired after the tube plates have been separated. At the same time, the support plates increase the load-bearing surface when the tube plates are spread apart, equalizing the force distribution on the tube plates and preventing problems such as eccentric loads and slippage during the tube plate extraction operation.

[0013] The positioning groove and positioning pin effectively prevent hazards such as slipping, snagging, and rotation during operation. [Brief explanation of the drawing]

[0014] [Figure 1] This is a schematic diagram showing the overall structure of the present invention. [Figure 2] This is a schematic diagram showing the separation structure of the present invention. [Figure 3] This is a schematic diagram showing the base structure of the present invention. [Figure 4] This is a schematic diagram showing the top cover structure of the present invention. [Explanation of Symbols]

[0015] 1. Bass 2. Top cover 3. Hydraulic jack 4. Positioning pin 5. Base support plate 6. Base cylinder 7. Jack receiving groove 8. Top cover barrel 9. Positioning groove 10. Drawer support plate [Modes for carrying out the invention]

[0016] The present invention will be described in detail below, combining drawings and specific embodiments.

[0017] Examples Refer to Figures 1-4.

[0018] As shown in FIG. 3, the base 1 includes a base support plate 5, a base barrel body 6, and a positioning pin 4. The base support plate 5 is fixed to the right end of the base barrel body 6. A groove is provided downward at the top of the base barrel body 6 to form a jack receiving groove 7. The jack receiving groove 7 conforms to the outer shape of the hydraulic jack 3. Thus, the fixed end of the hydraulic jack 3 is detachably fitted into the jack receiving groove 7, and the movable end of the hydraulic jack 3 can freely expand and contract. The direction in which the fixed end of the hydraulic jack 3 enters and exits the jack receiving groove 7 is perpendicular to the expansion and contraction direction of the hydraulic jack 3. Positioning pins 4 are screwed onto the front and rear side walls of the base barrel body 6 respectively.

[0019] As shown in FIG. 4, the top cover 2 includes a top cover barrel body 8 and a drawer support plate 10. The drawer support plate 10 is fixed to the right end of the top cover barrel body 8. A groove is provided leftward on the right side wall of the top cover barrel body 8 to form an inner cavity. The inner cavity of the top cover barrel body 8 conforms to the outer shape of the base barrel body 6. Positioning grooves 9 are provided on the front and rear side walls of the top cover barrel body 8 respectively.

[0020] The movable end of the hydraulic jack 3 is movably abutted against the top cover barrel body 8. The positioning pin ￥ is detachable from the outer wall of the base barrel body 6, and the fixed end of the hydraulic jack 3 is detachable from the jack receiving groove 7. Thus, it can be exchanged for hydraulic jacks 3 of different specifications according to various usage scenarios.

[0021] In terms of the operating principle, it can be exchanged for hydraulic jacks 3 of different specifications according to various usage scenarios. Then, the fixed end of the hydraulic jack 3 is fitted into the jack receiving groove 7 of the base barrel body 6. After that, the base barrel body 6 is inserted into the inner cavity of the top cover 2, and the positioning pin 4 is screwed onto the outer wall of the base barrel body 6 through the positioning groove 9.

[0022] As shown in FIG. 1, by retracting the hydraulic jack 3, the base support plate 5 is brought into contact with the drawer support plate 10 or the distance therebetween is minimized.

[0023] The base support plate 5 and the pull-out support plate 10 are inserted between the tube plate that needs inspection and repair. The force of the hydraulic jack 3 is used to extend the movable end of the hydraulic jack 3 and bring it into contact with the left inner wall of the top cover cylinder 8, thereby separating the base support plate 5 and the pull-out support plate 10 from each other and separating the tube plate.

[0024] The longitudinal extension direction of the base support plate 5 and the pull-out support plate 10 is perpendicular to the extension and retraction direction of the hydraulic jack 3. The length of the base support plate 5 and the pull-out support plate 10 is more than twice the outer diameter of the tube plate, which makes it possible to push open multiple tube plates simultaneously.

[0025] The sides of the base support plate 5 and the drawer support plate 10 that are separated from each other are provided with anti-slip patterns to increase the frictional force between them and the tube plate and prevent slippage.

[0026] The above are merely embodiments of the present invention and do not limit the scope of the patent of the present invention. Any equivalent structural transformation or equivalent process transformation using the contents of the specification and drawings of the present invention, or any application directly or indirectly to other related technical fields, shall all be similarly included within the scope of the patent protection of the present invention.

Claims

1. A new type of tube plate extraction device, A base (1) comprising a base cylinder (6) whose internal cavity is compatible with the structure of a hydraulic jack (3), and a base support plate (5) provided at the end of the base cylinder (6), The top cover (2) includes a top cover body (8) whose inner cavity fits the base body (6), and a pull-out support plate (10) provided at the end of the top cover body (8), A new type of tube plate pull-out device, comprising a hydraulic jack (3), the movable end of which is in contact with the inner wall of the top cover cylinder (8) and assembled to it, wherein the extension and retraction of the hydraulic jack (3) causes the base support plate (5) and the pull-out support plate (10) to move closer to each other, into contact, or separate from each other.

2. The new type of tube plate pull-out device according to claim 1, characterized in that a positioning groove (9) extending in the direction of extension and retraction of the hydraulic jack (3) is provided in the side wall of the top cover cylinder (8), and a positioning pin (4) slidably fitted into the positioning groove (9) is provided in the outer wall of the base cylinder (6).

3. The new type of tube plate pull-out device according to claim 2, characterized in that the positioning pin (4) is detachably screwed into the outer wall of the base cylinder (6).

4. The novel tube plate pull-out device according to claim 1, characterized in that anti-slip patterns are provided on the sides of the base support plate (5) and the pull-out support plate (10) that are separated from each other.

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