Cold-drawn precision welding steel pipe for boiler

Abstract

The utility model relates to the technical field of cold-drawn precision welding steel pipes, in particular to a cold-drawn precision welding steel pipe for a boiler, which is a mechanism convenient for improving the connection stability between an inner pipe and an outer pipe of the cold-drawn precision welding steel pipe, so that the use efficiency and the effect of the cold-drawn precision welding steel pipe are enhanced. Comprising an inner pipe and an outer pipe, and a connecting mechanism is arranged between the inner pipe and the outer pipe; the connecting mechanism further comprises sliding plates and fixing plates, the multiple sets of fixing plates are provided with connecting grooves, the multiple sets of fixing plates are evenly distributed on the inner wall of the outer pipe and connected with the outer pipe, the multiple sets of sliding plates are evenly distributed on the outer wall of the inner pipe, and the multiple sets of sliding plates are slidably clamped with the corresponding multiple sets of fixing plates through the connecting grooves correspondingly. Fastening mechanisms are arranged between the multiple sets of sliding plates and the multiple sets of fixing plates.

Description

Technical Field

[0001] The utility model relates to the technical field of cold-drawn precision welded steel pipes, in particular to a cold-drawn precision welded steel pipe for boilers. Background Art

[0002] As we all know, cold-drawn precision welded steel pipes for boilers, namely high-pressure boiler pipes, are a type of boiler pipes with high strength, high oxidation and corrosion resistance and good stability. They are mainly used to manufacture various superheater pipes, boiling water pipes, superheated steam pipes, etc. that work under ultra-high temperature and ultra-high pressure environments. In daily use, it is necessary to ensure that the temperature does not lose and improve the energy conversion efficiency of the fuel. However, the existing high-pressure boiler cold-drawn precision welded steel pipes do not take special insulation measures, or only take ordinary coatings, which cannot achieve a good insulation effect;

[0003] To this end, after searching the prior art, it is found that the patent technology that has been disclosed, such as a double-layer insulated cold-drawn precision welded steel pipe for boilers proposed by publication number CN205383349U, has a working principle of using a new type of double-layer insulated cold-drawn precision welded steel pipe for boilers, completely fixing the inner steel pipe in the outer steel pipe, and forming a cavity between the inner steel pipe and the outer steel pipe. When the steel pipe of the utility model is used, both ends of the steel pipe are sealed, and the heat accumulated in the cavity is not easy to lose, which plays a role in heat preservation; at the same time, a polyurethane integral foaming insulation layer can be filled in the cavity, which has less heat loss and better heat preservation effect;

[0004] However, in actual use, it was found that the connection between the protrusion and the fixed plate can only be restricted in the longitudinal direction, and there is no restriction mechanism in the horizontal direction, which easily causes an unstable connection between the inner and outer tubes, thereby reducing the efficiency and effect of the cold-drawn precision welded steel pipe, resulting in poor practicality. Utility Model Content

[0005] 1. Technical issues to be resolved

[0006] In view of the deficiencies in the prior art, the utility model provides a mechanism for improving the connection stability between the inner and outer tubes of a cold-drawn precision welded steel tube, thereby enhancing the use efficiency and effect of the cold-drawn precision welded steel tube, thereby enhancing the practicality of a cold-drawn precision welded steel tube for a boiler.

[0007] Second technical solution

[0008] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a cold-drawn precision welded steel pipe for a boiler, comprising an inner pipe and an outer pipe, wherein a connecting mechanism is provided between the inner pipe and the outer pipe;

[0009] The connecting mechanism also includes sliding plates and fixed plates. Multiple groups of fixed plates are provided with connecting grooves. Multiple groups of fixed plates are evenly distributed on the inner wall of the outer tube. Multiple groups of fixed plates are connected to the outer tube. Multiple groups of sliding plates are evenly distributed on the outer wall of the inner tube. Multiple groups of sliding plates are slidably clamped with corresponding multiple groups of fixed plates through connecting grooves. Fastening mechanisms are provided between the multiple groups of sliding plates and the multiple groups of fixed plates.

[0010] Furthermore, in order to facilitate the fixed connection between the fixed plate and the sliding plate, the improvement of the utility model is that the fastening mechanism also includes a mounting block and a limit rod, a working cavity is arranged in the multiple groups of mounting blocks, a first through hole is arranged on one side of the working cavity, second through holes are arranged at positions corresponding to the first through holes of the multiple groups of fixed plates and the multiple groups of sliding plates, the multiple groups of mounting blocks are respectively connected to the middle part of one side of the multiple groups of fixed plates, the limit rod is slidably mounted on the mounting block through the first through hole, the limit rod is slidably mounted on the corresponding fixed plate and sliding plate through the second through hole, and a reset mechanism is arranged in the working cavity.

[0011] Furthermore, in order to provide elastic force to the limit rod and clamp the fixed plate and the sliding plate in time, the improvement of the utility model is that the reset mechanism also includes a spring and a first plate, the first plate is fastened to the middle part of the limit rod, the spring is fitted to the limit rod, the first plate is slidably clamped to the working chamber, and the spring is squeezed by the first plate.

[0012] Furthermore, in order to facilitate the adjustment of the limit rods, the present invention is improved to further include baffles, and the plurality of groups of baffles are respectively connected to one side of the corresponding plurality of groups of limit rods.

[0013] Furthermore, in order to facilitate the placement of the baffle and prevent others from accidentally touching it, the improvement of the utility model also includes a mounting groove, and a mounting groove is set on one side of the multiple groups of mounting blocks, and the baffle is placed inside the mounting groove.

[0014] Furthermore, in order to facilitate the adjustment and pulling out of the baffle, the improvement of the utility model further includes a thread groove, and the middle part of one side of the plurality of baffles is provided with a thread groove.

[0015] Three beneficial effects

[0016] Compared with the prior art, the utility model provides a cold-drawn precision welded steel pipe for boilers, which has the following beneficial effects:

[0017] The cold-drawn precision welded steel pipe used in the boiler, during the process of connecting the inner pipe and the outer pipe, is convenient to connect the inner pipe and the outer pipe by using a connecting mechanism, and then is convenient to fix the multiple sets of sliding plates and the multiple sets of fixed plates by using a fixing mechanism, so that the installation is more stable and will not loosen, and then is convenient to reset the limit rod by using a spring and a first plate, and is convenient to lock and unlock the multiple sets of fixed plates and the multiple sets of sliding plates, and a mechanism is used to improve the connection stability between the inner and outer pipes of the cold-drawn precision welded steel pipe, thereby enhancing the use efficiency and effect of the cold-drawn precision welded steel pipe, thereby enhancing the practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of the utility model;

[0019] Figure 2 It is a structural schematic diagram of the main view of the utility model;

[0020] Figure 3 It is a structural schematic diagram of the connection between the sliding plate and the inner tube of the utility model;

[0021] Figure 4 It is a structural schematic diagram of the connection between the limit rod and the baffle of the utility model.

[0022] In the figure: 1. inner tube; 2. outer tube; 3. sliding plate; 4. fixed plate; 5. connecting groove; 6. mounting block; 7. limiting rod; 8. working chamber; 9. first through hole; 10. second through hole; 11. spring; 12. first plate; 13. baffle; 14. mounting groove; 15. threaded groove. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] See also Figure 1-4 , a cold-drawn precision welded steel pipe for a boiler, comprising an inner pipe 1 and an outer pipe 2, wherein a connecting mechanism is provided between the inner pipe 1 and the outer pipe 2;

[0025] The connecting mechanism also includes sliding plates 3 and fixed plates 4. Multiple groups of fixed plates 4 are provided with connecting grooves 5. Multiple groups of fixed plates 4 are evenly distributed on the inner wall of the outer tube 2. Multiple groups of fixed plates 4 are all connected to the outer tube 2. Multiple groups of sliding plates 3 are evenly distributed on the outer wall of the inner tube 1. Multiple groups of sliding plates 3 are respectively slidably clamped with corresponding multiple groups of fixed plates 4 through the connecting grooves 5. A fastening mechanism is provided between the multiple groups of sliding plates 3 and the multiple groups of fixed plates 4.

[0026] When the present invention is in use, in the process of connecting the inner tube 1 and the outer tube 2, the inner tube 1 and the outer tube 2 are conveniently connected by using a connecting mechanism through multiple groups of fixed plates 4 and multiple groups of sliding plates 3, and the connection is more stable. Then, by using a fixing mechanism, by using a mounting block 6 and a limiting rod 7, it is convenient to fix the multiple groups of sliding plates 3 and the multiple groups of fixed plates 4, and the installation is more stable and will not loosen. Then, by using a resetting mechanism, it is convenient to reset the limiting rod 7 through the use of a spring 11 and a first plate 12, and it is convenient to lock and unlock the multiple groups of fixed plates 4 and the multiple groups of sliding plates 3. By using a mechanism that is convenient for improving the connection stability between the inner and outer tubes 2 of the cold-drawn precision welded steel pipe, the use efficiency and effect of the cold-drawn precision welded steel pipe are enhanced, thereby enhancing practicality.

[0027] In actual use, it is found that it is not convenient to fix the fixed plate 4 and the sliding plate 3. In order to solve the above problem, in this embodiment, the fastening mechanism also includes a mounting block 6 and a limit rod 7. A working cavity 8 is arranged in multiple groups of mounting blocks 6. A first through hole 9 is arranged on one side of the working cavity 8. Second through holes 10 are arranged at positions corresponding to the first through holes 9 of multiple groups of fixed plates 4 and multiple groups of sliding plates 3. Multiple groups of mounting blocks 6 are respectively connected to the middle part of one side of multiple groups of fixed plates 4. The limit rod 7 is slidably mounted on the mounting block 6 through the first through hole 9. The limit rod 7 is slidably mounted on the corresponding fixed plate 4 and sliding plate 3 through the second through hole 10. A reset mechanism is arranged in the working cavity 8.

[0028] In actual use, it is found that it is inconvenient to provide elastic force to the limiting rod 7 and clamp the fixed plate 4 and the sliding plate 3 in time. In order to solve the above problem, in this embodiment, the reset mechanism also includes a spring 11 and a first plate 12. The first plate 12 is tightly fitted with the middle part of the limiting rod 7, the spring 11 is fitted with the limiting rod 7, the first plate 12 is slidably clamped with the working chamber 8, and the spring 11 is squeezed by the first plate 12.

[0029] It is found in actual use that it is inconvenient to adjust the limit rod 7. In order to solve the above problem, this embodiment further includes a baffle 13, and multiple groups of baffles 13 are respectively connected to one side of the corresponding multiple groups of limit rods 7.

[0030] In actual use, it is found that it is inconvenient to place the baffle 13. In order to solve the above problem, this embodiment also includes a mounting groove 14. A mounting groove 14 is set on one side of the multiple groups of mounting blocks 6, and the baffle 13 is placed inside the mounting groove 14.

[0031] It is found in actual use that it is inconvenient to adjust and pull out the baffle 13 . In order to solve the above problem, the present embodiment further includes a thread groove 15 . The middle part of one side of the plurality of baffles 13 is provided with a thread groove 15 .

[0032] In order to explain in detail the possible application scenarios, technical principles, specific schemes that can be implemented, and the purposes and effects that can be achieved, the following is a detailed description of the specific embodiments listed in conjunction with the accompanying drawings. The embodiments described herein are only used to more clearly illustrate the technical solutions of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0033] Reference to "embodiment" herein means that the specific features, structures or characteristics described in conjunction with the embodiment may be included in at least one embodiment of the present application. The term "embodiment" appearing in various places in the specification does not necessarily refer to the same embodiment, nor does it particularly limit its independence or association with other embodiments. In principle, in the present application, as long as there is no technical contradiction or conflict, the various technical features mentioned in the embodiments can be combined in any way to form a corresponding implementable technical solution.

[0034] Unless otherwise defined, the technical terms used in this document have the same meanings as those generally understood by those skilled in the art to which this application belongs; the use of relevant terms in this document is only for describing specific embodiments and is not intended to limit this application.

[0035] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A cold-drawn precision welded steel tube for a boiler, comprising an inner tube (1) and an outer tube (2), wherein a connecting mechanism is provided between the inner tube (1) and the outer tube (2); It is characterized in that The connection mechanism also includes a sliding plate (3) and a fixed plate (4), and the plurality of fixed plates (4) are provided with a connection groove (5). The plurality of fixed plates (4) are evenly distributed on the inner wall of the outer tube (2), and the plurality of fixed plates (4) are all connected to the outer tube (2). The plurality of sliding plates (3) are evenly distributed on the outer wall of the inner tube (1), and the plurality of sliding plates (3) are respectively slidably clamped with the corresponding plurality of fixed plates (4) through the connection groove (5), and a fastening mechanism is provided between the plurality of sliding plates (3) and the plurality of fixed plates (4).

2. The cold-drawn precision welded steel pipe for boiler according to claim 1, characterized in that: The fastening mechanism also includes a mounting block (6) and a limiting rod (7); a working cavity (8) is arranged in the plurality of mounting blocks (6); a first through hole (9) is arranged on one side of the working cavity (8); a second through hole (10) is arranged at a position corresponding to the first through hole (9) on the plurality of fixed plates (4) and the plurality of sliding plates (3); the plurality of mounting blocks (6) are respectively connected to the middle part of one side of the plurality of fixed plates (4); the limiting rod (7) is slidably mounted on the mounting block (6) through the first through hole (9); the limiting rod (7) is slidably mounted on the corresponding fixed plate (4) and the sliding plate (3) through the second through hole (10); and a reset mechanism is arranged in the working cavity (8).

3. The cold-drawn precision welded steel pipe for boiler according to claim 2, characterized in that: The reset mechanism also includes a spring (11) and a first plate (12); the first plate (12) is tightly fitted with the middle part of the limiting rod (7); the spring (11) is fitted with the limiting rod (7); the first plate (12) is slidably mounted with the working chamber (8); and the spring (11) is squeezed by the first plate (12).

4. The cold-drawn precision welded steel pipe for boiler according to claim 3, characterized in that: It also includes baffles (13), and multiple groups of baffles (13) are respectively connected to one side of the corresponding multiple groups of limiting rods (7).

5. The cold-drawn precision welded steel pipe for boiler according to claim 4, characterized in that: It also comprises a mounting groove (14), one side of the plurality of mounting blocks (6) is provided with the mounting groove (14), and the baffle (13) is placed inside the mounting groove (14).

6. The cold drawn precision welded steel tube for boiler according to claim 5, characterized in that: It also comprises a thread groove (15), and the thread groove (15) is arranged in the middle of one side of the plurality of baffle plates (13).

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