Anti-corrosion thin-wall jacketed pipe

Abstract

The utility model discloses an anti-corrosion thin-wall jacketed pipe which comprises a pipe section, the pipe section comprises an inner pipe and an outer pipe sleeved outside the inner pipe, a jacketed cavity is arranged between the inner pipe and the outer pipe, the jacketed cavities of two adjacent jacketed pipes are communicated through a communicating pipe, and the communicating pipe is communicated with the outer pipe. The outer wall of the inner pipe is covered with an inner pipe impingement plate corresponding to an outlet of the communicating pipe. The impingement plate is additionally arranged at the steam inlet of the jacket inner pipe, so that the damage of steam to the inner pipe can be effectively reduced, the service life of the inner pipe is prolonged, and the safety is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of pipelines, in particular to an anti-corrosion thin-wall jacketed pipe. Background Art

[0002] Jacketed pipe is a special type of pipe, which consists of two concentric pipes, the outer pipe is called "jacket" and the inner pipe is called "inner pipe", so it is called jacketed pipe. The purpose of the design of jacketed pipe is to pass the external medium into the space between the outer pipe and the inner pipe (i.e. the jacket cavity), the external medium is a heat medium (such as steam, hot oil, etc.) or a cold medium (such as cold water, liquid nitrogen, etc.), so as to heat or cool the internal medium in the inner pipe. This design is widely used in industrial processes that require strict temperature control, such as chemical, pharmaceutical, food processing and other fields.

[0003] Since the jacket cavity in each section of the jacket pipe is a closed cavity, the connection between adjacent pipe sections can make the inner pipes relatively connected, but the jacket cavities cannot be relatively connected. The two adjacent pipe sections need to be connected by a connecting pipe bypassing the connection to achieve communication.

[0004] The external medium used for heat exchange applications is usually called industrial steam. Industrial steam is steam generated by boilers. Usually boilers and pipelines are made of carbon steel, and some iron filings and rust particles will be generated in carbon steel pipelines. Since the connecting pipe is thin, these particles will impact the inner pipe when the steam enters the outer pipe of the jacket from the connecting pipe, and the iron filings in the steam will collide with the inner pipe.

[0005] Since the diameter of the connecting pipe is small, the steam flow rate in the connecting pipe increases. Under the action of the high flow rate, rust particles impact the outer wall of the inner pipe, causing the outer wall of the inner pipe opposite to the outlet of the connecting pipe to be damaged by the impact. Utility Model Content

[0006] In order to solve the problem that the outer wall of the inner tube is easily damaged by the impact of the fluid at the connecting tube outlet, the utility model provides an anti-corrosion thin-walled jacketed tube, which can prevent the connecting tube outlet from causing impact damage to the outer wall of the inner tube.

[0007] The technical solution adopted by the utility model is to design an anti-corrosion thin-walled jacketed pipe, including a pipe section, wherein the pipe section includes an inner pipe and an outer pipe sleeved outside the inner pipe, a jacket cavity is formed between the inner pipe and the outer pipe, the jacket cavities of two adjacent jacketed pipes are connected by a connecting pipe, and the outer wall of the inner pipe is covered with an inner pipe anti-collision plate corresponding to the outlet of the connecting pipe.

[0008] In certain embodiments, the inner tube anti-collision plate is a ring body sleeved on the inner tube.

[0009] In certain embodiments, the ring body is rotatably mounted on the inner tube.

[0010] In some embodiments, balls are supported between the ring body and the inner tube.

[0011] In certain embodiments, the outer wall of the annulus has protrusions distributed circumferentially.

[0012] In some embodiments, a baffle is provided at the outlet of the connecting pipe, and the baffle is controlled to rotate by a rotating device, thereby controlling the air outlet direction of the connecting pipe outlet.

[0013] In certain embodiments, an outer tube anti-collision plate opposite to the wind control direction of the baffle is provided on the inner wall of the outer tube.

[0014] In some embodiments, the number of the outer tube anti-collision plates is two and they are symmetrically arranged with respect to the inner tube.

[0015] In certain embodiments, an opening is provided on the outer tube wall, a detachable cover is provided on the opening, and the outer tube anti-collision plate is fixed on the cover.

[0016] In some embodiments, the inner tube anti-collision plate is made of the same material as the inner tube.

[0017] Compared with the prior art, the utility model has the following beneficial effects:

[0018] The utility model adds an anti-collision plate at the steam inlet of the jacket inner tube, which can effectively reduce the damage of the steam to the inner tube, prolong the service life of the inner tube and improve the safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention is described in detail below in conjunction with specific embodiments and drawings. In order to show details and facilitate understanding of its principles, it is not necessarily drawn to scale, and similar reference numerals may describe similar components in different views. The drawings generally illustrate the embodiments discussed herein by way of example and not limitation. Among them:

[0020] Figure 1 Schematic diagram of the axial cross section of the jacket tube of Example 1.

[0021] Figure 2 yes Figure 1 Schematic diagram of the AA section.

[0022] Figure 3 Schematic diagram of the axial cross section of the jacket tube of the second embodiment.

[0023] Figure 4 yes Figure 3 Schematic diagram of BB cross section.

[0024] Figure 5 yes Figure 4 Schematic diagram of the baffle rotating to the other side.

[0025] In the figure, 1, inner tube; 2, outer tube; 3, jacket cavity; 4, connecting tube; 5, inner tube anti-collision plate; 6, ring body; 7, ball; 8, baffle; 9, rotating shaft; 10, outer tube anti-collision plate; 11, cover; 12, bolt; 13, protrusion. DETAILED DESCRIPTION

[0026] The following are specific embodiments of the present invention, and the technical solution of the present invention is further described in conjunction with the accompanying drawings, but the present invention is not limited to these embodiments, and the following embodiments do not limit the utility model involved in the claims. In addition, all combinations of the features described in the embodiments are not necessarily required for the solution of the utility model.

[0027] The principle and structure of the present utility model are described in detail below with reference to the accompanying drawings and embodiments.

[0028] Embodiment 1

[0029] like Figure 1 , 2 As shown, a corrosion-resistant thin-walled jacketed pipe comprises a pipe section, wherein the pipe section comprises an inner pipe 1 and an outer pipe 2 sleeved outside the inner pipe 1, wherein a jacket cavity 3 is formed between the inner pipe 1 and the outer pipe 2, and the jacket cavities 3 of two adjacent jacketed pipes are connected by a connecting pipe 4, and the outer wall of the inner pipe 1 is covered with an inner pipe anti-collision plate 1 corresponding to the outlet of the connecting pipe 4, so that the impact airflow at the outlet of the connecting pipe 4 impacts on the inner pipe anti-collision plate 1, thereby protecting the inner pipe 1. The material of the inner pipe anti-collision plate 1 is the same as that of the inner pipe 1, and the thickness should not be too thick. The wall thickness of the anti-collision plate generally used is selected from the smaller value of the wall thickness of the inner pipe 1 and 6.02 mm, so as to avoid generating large stress during welding and causing stress damage to the parent material of the inner pipe 1. Considering the economy, the pipe remnant with the same material and the same diameter as the inner pipe 1 can be used for processing. The anti-collision plate can be processed into a spherical shape or a tile shape. Considering the use of pipe remnants for processing, the anti-collision plate can be projected into a square tile shape by the processing plant. The welding of the anti-collision plate adopts full argon welding, and the weld is full welding, that is, no gap is left in the welding joint; to avoid the accumulation of harmful substances, no ventilation holes can be set on the anti-collision plate. The welding process adopts the same welding process as the inner pipe 1 pipeline welding. The welding line energy must be strictly controlled during the welding process, that is, a small current is used for welding while ensuring full penetration. When using multi-layer welding, the interlayer temperature must be strictly controlled and the interlayer temperature must be controlled below 150℃.

[0030] Embodiment 2

[0031] like Figure 3 , 4As shown in Figures 5 and 6, the inner tube anti-collision plate 1 is a ring body 6 sleeved on the inner tube 1, and the ring body 6 is sleeved on the inner tube 1 when rotating. A ball 7 is supported between the ring body 6 and the inner tube 1. Under the impact of airflow, the ring body 6 can rotate around the inner tube 1, thereby avoiding impacting only one part of the ring body 6 and improving the service life of the ring body 6. The rotation of the ring body 6 is also conducive to buffering the impact force of the impact airflow.

[0032] The outlet of the connecting pipe 4 is provided with a baffle 8, and the baffle 8 is controlled to rotate by a rotating device. The rotating device includes a rotating shaft 9 connected to the baffle 8, and the rotating shaft 9 can be used to connect a knob or a motor outside the connecting pipe 4 to control the rotation of the baffle 8, thereby controlling the air outlet direction of the connecting pipe 4 outlet, that is, the air outlet angle relative to the inner tube 1 is changed, so that the air outlet impacts one side or the other side of the ring body 6 relative to the axis of the tube body, so that the ring body 6 rotates clockwise or counterclockwise, so that the airflow impacts the surface of the ring body 6 evenly, thereby improving the service life of the ring body 6.

[0033] The inner wall of the outer tube 2 is provided with an outer tube anti-collision plate 10 opposite to the wind control direction of the baffle 8. The outer tube anti-collision plates 10 are two symmetrically arranged about the inner tube 1. The outer tube anti-collision plates 10 prevent the airflow from impacting the inner wall of the outer tube 2.

[0034] An opening is provided on the wall of the outer tube 2, that is, a window opened on the tube wall, and a detachable cover 11 is provided on the opening. The cover 11 is a part of the outer tube wall, and the edge of the cover 11 is detachably connected to the edge of the opening by bolts 12. The outer tube anti-collision plate 10 is fixed on the cover 11, so that it is convenient to open the cover 11 to check the corrosion condition of the ring body 6 and the outer tube anti-collision plate 10, or to replace the outer tube anti-collision plate 10 by replacing the cover 11.

[0035] Furthermore, protrusions 13 are distributed circumferentially on the outer wall of the ring body 6 , thereby increasing the impact force of the airflow on the surface of the ring body 6 .

[0036] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described, or replace them in similar ways, without departing from the spirit of the present invention or exceeding the scope defined by the appended claims.

[0037] Although some terms are used more frequently in this article, the possibility of using other terms is not excluded. These terms are used only to more conveniently describe and explain the essence of the utility model; interpreting them as any additional restrictions is contrary to the spirit of the utility model. The execution order of actions, steps, etc. in the devices and methods shown in the specification and the drawings can be implemented in any order as long as there is no special explicit limitation on the order and the output of the previous processing is not used in the subsequent processing. Similar sequential terms (for example, "first", "next", "secondly", "again", "then", etc.) used for the convenience of description do not mean that they must be implemented in such an order.

[0038] It should be understood by those skilled in the art that all directional references (for example, above, below, upward, up, downward, down, top, bottom, left, right, vertical, horizontal, etc.) are used descriptively in the drawings to facilitate the reader's understanding, and do not represent limitations (for example, on position, orientation or use, etc.) on the scope of the present invention as defined by the appended claims. They are only for the convenience of describing the present application and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the referred device or element must have a specific orientation or be constructed and operated in a specific orientation. The directional words "inside and outside" refer to the inside and outside relative to the outline of each component itself.

[0039] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" may include both "above" and "below". The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0040] In addition, some vague terms (e.g., substantially, certain, generally, etc.) may refer to slight inaccuracies or slight deviations of conditions, quantities, values, or dimensions, some of which are within the manufacturing deviation or tolerance range. It should be noted that the use of words such as "first" and "second" to define components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above words have no special meanings and therefore cannot be understood as limiting the scope of protection of this application.

Claims

1. A corrosion-resistant thin-walled jacketed pipe, comprising a pipe section, wherein the pipe section comprises an inner pipe and an outer pipe sleeved outside the inner pipe, a jacket cavity is formed between the inner pipe and the outer pipe, and the jacket cavities of two adjacent jacketed pipes are connected by a connecting pipe, characterized in that: The outer wall of the inner tube is covered with an inner tube anti-collision plate corresponding to the connecting tube outlet.

2. The anti-corrosion thin-walled jacketed pipe according to claim 1, characterized in that: The inner tube anti-collision plate is a ring body sleeved on the inner tube.

3. The anti-corrosion thin-walled jacketed pipe according to claim 2, characterized in that: The ring body is rotatably sleeved on the inner tube.

4. The anti-corrosion thin-walled jacketed pipe according to claim 3, characterized in that: Balls are supported between the ring body and the inner tube.

5. The anti-corrosion thin-walled jacketed pipe according to claim 3, characterized in that: The outer wall of the ring body is provided with protrusions distributed in the circumferential direction.

6. The anti-corrosion thin-walled jacketed pipe according to claim 2, characterized in that: The outlet of the connecting pipe is provided with a baffle, and the baffle is controlled to rotate by a rotating device, so as to control the air outlet direction of the connecting pipe outlet.

7. The anti-corrosion thin-walled jacketed pipe according to claim 6, characterized in that: The inner wall of the outer tube is provided with an outer tube anti-collision plate opposite to the wind control direction of the baffle.

8. The anti-corrosion thin-walled jacketed pipe according to claim 7, characterized in that: The outer tube anti-collision plates are two symmetrically arranged with respect to the inner tube.

9. The anti-corrosion thin-walled jacketed pipe according to claim 7, characterized in that: The outer tube wall is provided with an opening, the opening is provided with a detachable opening cover, and the outer tube anti-collision plate is fixed on the opening cover.

10. The corrosion-resistant thin-walled jacketed pipe according to claim 1, characterized in that: The inner tube anti-collision plate is made of the same material as the inner tube.

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