A radial fixing device for pipe inner cylinder

Abstract

This utility model belongs to the technical field of water spray desuperheaters, and in particular, it is a radial fixing device for an inner cylinder of a pipe. It includes an outer cylinder, with four rectangular tubes uniformly welded circumferentially to the side wall of the outer cylinder. A driving mechanism is fixedly installed on the side wall of the rectangular tubes away from the outer cylinder. A sealing mechanism is installed on the outer surface of the rectangular tubes corresponding to the driving mechanism. A rectangular block is fixedly installed on the inward-facing side of the driving mechanism. An inner cylinder is provided inside the outer cylinder, and a reinforcing mechanism is fixedly installed on the outer surface of the inner cylinder at a position corresponding to the rectangular block, with the rectangular block inserted into the reinforcing mechanism. This utility model achieves the effect of fixing the inner cylinder inside the outer cylinder by driving the rectangular block into the reinforcing mechanism through the driving mechanism. The inner cylinder is more firmly and stably fixed, facilitating disassembly and maintenance. The inner cylinder can generate relative movement, reducing the stress caused by thermal expansion and offsetting the frictional force caused by the longitudinal scouring of the inner cylinder by steam during the operation of the desuperheater.

Description

Technical Field

[0001] This utility model relates to the technical field of water spray desuperheaters, specifically a radial fixing device for the inner cylinder of a pipe. Background Technology

[0002] Water spray desuperheater: This type of desuperheater directly sprays water into superheated steam to achieve cooling. When steam flows through the desuperheater inlet, water is injected through a specific device and mixes with the superheated steam. Within a certain distance, water droplets exchange heat with the superheated steam, causing the water to vaporize and heat up, while the superheated steam temperature decreases. Finally, the two form a new type of low-temperature superheated steam with different parameters. During the vaporization process after the water mixes with the superheated steam, to prevent water droplets from falling onto the outer wall of the desuperheater and causing thermal stress fatigue cracks, an inner cylinder is installed in the water spray desuperheater. The inner cylinder is not pressurized; it simply allows the desuperheating water sufficient time to vaporize. Therefore, the length of the inner cylinder is the distance the steam travels during the sufficient vaporization time plus a slight margin.

[0003] Currently, multiple (usually four in a group) rectangular blocks are welded around the inner cylinder to support it within the outer wall of the desuperheater. Due to manufacturing limitations, the outer tangent circle of the blocks is smaller than the inner circle of the desuperheater's outer wall. Furthermore, elliptic errors in the tube's shape during the desuperheater's outer wall production prevent a tight fit between the blocks and the inner edge of the outer cylinder inlet. This hinders the radial positioning of the desuperheater's inner cylinder. During desuperheater operation, changes in steam volume and disturbances caused by water spraying can lead to vibrations in the inner tube, exacerbating stress in the water spray pipe. Therefore, we propose a radial fixing device for the inner cylinder to address these issues. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] To address the shortcomings of existing technologies, this utility model provides a radial fixing device for the inner cylinder of a pipe, which solves the problems mentioned in the background art.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, this utility model specifically adopts the following technical solution:

[0008] A radial fixing device for a pipe inner cylinder includes an outer cylinder. Four rectangular tubes are uniformly welded to the side wall of the outer cylinder along the circumference. A driving mechanism is fixedly installed on the side wall of the rectangular tubes away from the outer cylinder. A sealing mechanism is installed on the outer surface of the rectangular tubes corresponding to the driving mechanism. A rectangular block is fixedly installed on the side of the driving mechanism facing inward. An inner cylinder is provided inside the outer cylinder. A reinforcing mechanism is fixedly installed on the outer surface of the inner cylinder at a position corresponding to the rectangular block, and the rectangular block is inserted into the reinforcing mechanism.

[0009] Furthermore, a rectangular opening is provided on the outer cylinder sidewall corresponding to the rectangular tube, and the side of the rectangular tube facing the inner cylinder has an opening structure.

[0010] Furthermore, the drive mechanism includes a ball screw, a mechanical seal, a handle, and a ball nut. The ball screw is fixedly installed on the side wall of the rectangular tube away from the inner cylinder by means of the mechanical seal. A handle is fixedly installed on the end of the ball screw located on the outer side of the rectangular tube. A ball nut is provided on the ball screw, and the lower surface of the ball nut is fixedly connected to the rectangular block.

[0011] Furthermore, the rectangular block corresponding to the ball screw has a through hole for mounting the ball screw.

[0012] Furthermore, the outer surface of the rectangular block has a rectangular cross-section near the upper side, and the outer surface of the rectangular block is movably fitted with the inner wall of the rectangular tube, while the outer surface of the rectangular block has a cylindrical cross-section near the lower side.

[0013] Furthermore, a rubber sealing sleeve is fixedly embedded on the outer surface of the rectangular block, and the outer surface of the rubber sealing sleeve is movably fitted with the inner wall of the rectangular tube.

[0014] Furthermore, the sealing mechanism includes a threaded sleeve and a sealing cap. The threaded sleeve is fixedly installed on the side of the rectangular tube away from the outer cylinder, and the sealing cap is threaded onto the threaded sleeve, and the sealing cap covers the handle.

[0015] Furthermore, the reinforcing mechanism includes an arc-shaped reinforcing plate and a groove. The arc-shaped reinforcing plate is fixedly installed on the outer surface of the inner cylinder, and the arc-shaped reinforcing plate has a groove on the side facing the rectangular block.

[0016] (III) Beneficial Effects

[0017] Compared with the prior art, this utility model provides a radial fixing device for the inner cylinder of a pipe, which has the following beneficial effects:

[0018] This utility model uses a drive mechanism to insert a rectangular block into a reinforcing mechanism, thereby fixing the inner cylinder inside the outer cylinder. This makes the inner cylinder more secure and stable, facilitating disassembly and maintenance. The inner cylinder can generate relative movement, reducing the stress caused by thermal expansion and offsetting the friction caused by the longitudinal scouring of the inner cylinder by steam during the operation of the desuperheater. The sealing mechanism effectively prevents the drive mechanism from being accidentally touched. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the main structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the main sectional view of the present invention;

[0021] Figure 3 This is a schematic diagram of the left-side structure of this utility model;

[0022] Figure 4 This is a schematic diagram of the rectangular block cross-sectional structure of this utility model;

[0023] Figure 5 This is a cross-sectional view of the outer cylinder of this utility model.

[0024] In the diagram: 1. Outer cylinder; 2. Rectangular tube; 3. Drive mechanism; 301. Ball screw; 302. Mechanical seal; 303. Handle; 304. Ball nut; 4. Sealing mechanism; 401. Threaded sleeve; 402. Sealing cap; 5. Rectangular block; 6. Inner cylinder; 7. Reinforcing mechanism; 701. Arc-shaped reinforcing plate; 702. Groove; 8. Rectangular opening; 9. Through hole; 10. Rubber sealing sleeve. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model. Example

[0026] like Figures 1-5 As shown in the figure, an embodiment of the present invention provides a radial fixing device for an inner cylinder of a pipe, including an outer cylinder 1. Four rectangular tubes 2 are uniformly fixedly welded to the side wall of the outer cylinder 1 along the circumference. A driving mechanism 3 is fixedly installed on the side wall of the rectangular tubes 2 away from the outer cylinder 1. A sealing mechanism 4 is installed on the outer surface of the rectangular tubes 2 corresponding to the driving mechanism 3. A rectangular block 5 is fixedly installed on the side of the driving mechanism 3 facing inward. An inner cylinder 6 is provided inside the outer cylinder 1. A reinforcing mechanism 7 is fixedly installed on the outer surface of the inner cylinder 6 at a position corresponding to the rectangular block 5, and the rectangular block 5 is inserted into the reinforcing mechanism 7.

[0027] like Figure 2 and Figure 3 As shown, in some embodiments, a rectangular opening 8 is provided on the side wall of the outer cylinder 1 corresponding to the rectangular tube 2, and the side of the rectangular tube 2 facing the inner cylinder 6 is an open structure.

[0028] In this embodiment, the rectangular opening 8 facilitates the installation of the rectangular tube 2 on the side wall of the outer cylinder 1, and the opening of the rectangular tube 2 facilitates the movement of the rectangular block 5.

[0029] like Figure 4As shown, in some embodiments, the drive mechanism 3 includes a ball screw 301, a mechanical seal 302, a handle 303, and a ball nut 304. The ball screw 301 is fixedly installed on the side wall of the rectangular tube 2 away from the inner cylinder 6 by the mechanical seal 302. The handle 303 is fixedly installed on the end of the ball screw 301 located on the outside of the rectangular tube 2. The ball screw 301 is provided with a ball nut 304, and the lower surface of the ball nut 304 is fixedly connected to the rectangular block 5.

[0030] In this embodiment, the handle 303 drives the ball screw 301 to rotate in the mechanical seal 302, and the rotation of the ball screw 301 causes the ball nut 304 to move the rectangular block 5.

[0031] like Figure 4 As shown, in some embodiments, the rectangular block 5 corresponding to the ball screw 301 is provided with a through hole 9 for mounting the ball screw 301.

[0032] In this embodiment, the through hole 9 satisfies the requirements for the installation and rotation of the ball screw 301 within the rectangular block 5.

[0033] like Figure 4 As shown, in some embodiments, the outer surface of the rectangular block 5 has a rectangular cross-section near the upper side, and the outer surface of the rectangular block 5 is movably fitted with the inner wall of the rectangular tube 2. The outer surface of the rectangular block 5 has a cylindrical cross-section near the lower side.

[0034] In this embodiment, the rectangular portion on the outer surface of the rectangular block 5 allows the rectangular block 5 to move along the inner wall of the rectangular tube 2, while the cylindrical portion facilitates the insertion of the rectangular block 5 into the reinforcing mechanism 7.

[0035] like Figure 2 and Figure 3 As shown, in some embodiments, a rubber sealing sleeve 10 is fixedly embedded on the outer surface of the rectangular block 5, and the outer surface of the rubber sealing sleeve 10 is movably fitted with the inner wall of the rectangular tube 2.

[0036] In this embodiment, the rubber sealing sleeve 10 improves the sealing effect between the rectangular block 5 and the inner wall of the rectangular tube 2.

[0037] like Figure 2 and Figure 3 As shown, in some embodiments, the sealing mechanism 4 includes a threaded sleeve 401 and a sealing cap 402. The threaded sleeve 401 is fixedly installed on the side of the rectangular tube 2 away from the outer cylinder 1. The sealing cap 402 is threadedly installed on the threaded sleeve 401 and covers the handle 303.

[0038] In this embodiment, the threaded sleeve 401 is used for threaded installation of the sealing cover 402. The sealing cover 402 covers the handle 303, effectively preventing the handle 303 from being accidentally touched.

[0039] like Figure 2 and Figure 3 As shown, in some embodiments, the reinforcing mechanism 7 includes an arc-shaped reinforcing plate 701 and a groove 702. The arc-shaped reinforcing plate 701 is fixedly installed on the outer surface of the inner cylinder 6, and the arc-shaped reinforcing plate 701 has a groove 702 on the side facing the rectangular block 5.

[0040] In this embodiment, the arc-shaped reinforcing plate 701 increases the strength of the inner cylinder 6, and the groove 702 is used for the rectangular block 5 to be inserted into the arc-shaped reinforcing plate 701. The cross-section of the groove 702 is circular, and the inner diameter of the groove 702 matches the diameter of the lower cylindrical part of the rectangular block 5.

[0041] During use, insert the inner cylinder 6 into the outer cylinder 1, aligning the reinforcing mechanism 7 on the inner cylinder 6 with the rectangular block 5. The handle 303 in the drive mechanism 3 on the side wall of the four rectangular tubes 2 on the outer cylinder 1 drives the ball screw 301 to rotate in the mechanical seal 302. The rotation of the ball screw 301 causes the ball nut 304 to move the rectangular block 5 toward the arc-shaped reinforcing plate 701, so that the rectangular block 5 is inserted into the groove 702 on the arc-shaped reinforcing plate 701. Note that the circumferential drive mechanism 3 drives the rectangular block 5 to be screwed in evenly, achieving the effect of installing and fixing the inner cylinder 6. After installation, the sealing cover 402 in the sealing mechanism 4 is threaded onto the threaded sleeve 401. The sealing cover 402 covers the handle 303, effectively preventing the handle 303 from being accidentally touched. The inner cylinder 6 is more firmly and stably fixed, making it convenient to disassemble and repair the inner cylinder 6. The rectangular block 5 on the drive mechanism 3 enables the inner cylinder 6 to generate relative movement, reducing the stress caused by thermal expansion and offsetting the friction caused by the longitudinal scouring of the inner cylinder 6 by steam during the operation of the desuperheater.

[0042] In summary, the radial fixing device for the inner cylinder of the pipe, through the driving mechanism 3, drives the rectangular block 5 to be inserted into the reinforcing mechanism 7, thereby achieving the effect of fixing the inner cylinder 6 inside the outer cylinder 1. The inner cylinder 6 is more firmly and stably fixed, making it convenient to disassemble and repair the inner cylinder 6. The inner cylinder 6 can generate relative movement, reducing the stress caused by thermal expansion and offsetting the friction caused by the longitudinal scouring of the inner cylinder 6 by steam during the operation of the desuperheater.

[0043] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A pipe-in-pipe radial fixation device comprising an outer cylinder (1), characterized in that: Four rectangular tubes (2) are uniformly welded to the side wall of the outer cylinder (1) along the circumference. A driving mechanism (3) is fixedly installed on the side wall of the rectangular tube (2) away from the outer cylinder (1). A sealing mechanism (4) is installed on the outer surface of the rectangular tube (2) corresponding to the driving mechanism (3). A rectangular block (5) is fixedly installed on the side of the driving mechanism (3) facing inward. An inner cylinder (6) is provided inside the outer cylinder (1). A reinforcing mechanism (7) is fixedly installed on the outer surface of the inner cylinder (6) at the position corresponding to the rectangular block (5), and the rectangular block (5) is inserted into the reinforcing mechanism (7).

2. The radial fixing device for the inner cylinder of a pipe according to claim 1, characterized in that: The rectangular tube (2) has a rectangular opening (8) on the side wall of the outer cylinder (1) corresponding to it, and the side of the rectangular tube (2) facing the inner cylinder (6) is an opening structure.

3. The radial fixing device for the inner cylinder of a pipe according to claim 1, characterized in that: The drive mechanism (3) includes a ball screw (301), a mechanical seal (302), a handle (303), and a ball nut (304). The ball screw (301) is fixedly installed on the side wall of the rectangular tube (2) away from the inner cylinder (6) by the mechanical seal (302). The handle (303) is fixedly installed on the end of the ball screw (301) located on the outside of the rectangular tube (2). A ball nut (304) is provided on the ball screw (301). The lower surface of the ball nut (304) is fixedly connected to the rectangular block (5).

4. The radial fixing device for the inner cylinder of a pipe according to claim 3, characterized in that: The rectangular block (5) corresponding to the ball screw (301) has a through hole (9) for installing the ball screw (301).

5. A radial fixing device for the inner cylinder of a pipe according to claim 1, characterized in that: The outer surface of the rectangular block (5) has a rectangular cross-section near the upper side, and the outer surface of the rectangular block (5) is in contact with the inner wall of the rectangular tube (2). The outer surface of the rectangular block (5) has a cylindrical cross-section near the lower side.

6. The radial fixing device for the inner cylinder of a pipe according to claim 1, characterized in that: A rubber sealing sleeve (10) is fixedly embedded on the outer surface of the rectangular block (5), and the outer surface of the rubber sealing sleeve (10) is in contact with the inner wall of the rectangular tube (2).

7. A radial fixing device for the inner cylinder of a pipe according to claim 1, characterized in that: The sealing mechanism (4) includes a threaded sleeve (401) and a sealing cap (402). The threaded sleeve (401) is fixedly installed on the side of the rectangular tube (2) away from the outer cylinder (1). The sealing cap (402) is threaded on the threaded sleeve (401) and covers the handle (303).

8. A radial fixing device for the inner cylinder of a pipe according to claim 1, characterized in that: The reinforcing mechanism (7) includes an arc-shaped reinforcing plate (701) and a groove (702). The arc-shaped reinforcing plate (701) is fixedly installed on the outer surface of the inner cylinder (6). The arc-shaped reinforcing plate (701) has a groove (702) on the side facing the rectangular block (5).

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