Liquid heat transfer medium injection pipe and heating device

Abstract

The present invention relates to a liquid heat-conducting medium injection pipe and a heating device. The injection pipe is installed in a shell of a heat exchange device to provide liquid heat-conducting medium into the shell. The shell is provided with a liquid outlet for the liquid heat-conducting medium to flow out. The injection pipe includes a main liquid inlet pipe and a branch pipe connected to the main liquid inlet pipe. One end of the main liquid inlet pipe is a closed end, and the other end is a liquid inlet for the liquid heat-conducting medium to flow in. The closed end is close to the liquid outlet. The branch pipe is arranged at a position close to the liquid inlet of the main liquid inlet pipe. The main liquid inlet pipe is evenly arranged with injection holes. One end of the branch pipe is a closed end, and the other end is connected to the main liquid inlet pipe. The branch pipe is provided with a jet hole on the pipe wall facing the closed end of the main liquid inlet pipe. Compared with the prior art, the present invention has the advantages of high heat exchange efficiency and no overheating.

Description

Technical Field

[0001] The invention relates to a liquid heater, in particular to a liquid heat-conducting medium injection pipe and a heating device. Background Art

[0002] In the roller temperature controller, the heat transfer medium needs to be heated. The traditional heater is similar to a U-tube heat exchanger, with one end filled with heating tubes and the heat transfer medium running in the shell. Since there is no baffle in the middle to interfere with the fluid, the heat flow of the flow medium in the heater cannot be fully turbulent, and the heat transfer medium is difficult to fully contact the heat exchange tube. The medium is heated unevenly. In actual use, it is also found that there is carbonization in the heater due to overheating of the medium. Therefore, it is necessary not only to enhance the heat exchange efficiency of the heat exchanger, but also to avoid overheating of the heating tube. Summary of the invention

[0003] The purpose of the present invention is to provide a liquid heat transfer medium injection tube and a heating device in order to overcome the defects of the above-mentioned prior art, such as uneven heating and easy overheating of the heating tube.

[0004] The purpose of the present invention can be achieved by the following technical solutions:

[0005] A liquid heat-conducting medium injection pipe, which is installed in a shell of a heat exchange device to provide liquid heat-conducting medium into the shell, and the shell is provided with a liquid outlet for the liquid heat-conducting medium to flow out;

[0006] The injection pipe includes a main liquid inlet pipe and a branch pipe connected to the main liquid inlet pipe, one end of the main liquid inlet pipe is a closed end, and the other end is a liquid inlet for the liquid heat transfer medium to flow into, the closed end is close to the liquid outlet, the branch pipe is arranged at a position close to the liquid inlet of the main liquid inlet pipe, and injection holes are evenly arranged on the main liquid inlet pipe; one end of the branch pipe is a closed end, and the other end is connected to the main liquid inlet pipe, and a jet hole is provided on the tube wall of the branch pipe facing the closed end of the main liquid inlet pipe.

[0007] The branch pipe is perpendicular to the main liquid inlet pipe.

[0008] Along the axial direction of the main liquid inlet pipe, the main liquid inlet pipe is provided with a plurality of injection surfaces which are parallel to each other and arranged at equal distances, and the injection holes are evenly arranged on the circular structure where the injection surfaces intersect the main liquid inlet pipe.

[0009] The injection surface is perpendicular to the axial direction of the main liquid inlet pipe; each injection surface is provided with 1 to 6 injection holes, preferably 4 injection holes.

[0010] The present invention also provides a heating device using the above-mentioned liquid heat-conducting medium injection pipe, comprising a shell, a first heat pipe end flange and a second heat pipe end flange respectively arranged at both ends of the shell, a heating pipe installed in the shell, and an injection pipe installed in the shell through the second heat pipe end flange; the shell is provided with a liquid outlet for the liquid heat-conducting medium to flow out; and a thermocouple is provided in the heating pipe.

[0011] The heating pipe is a U-shaped pipe, and the inlet and outlet of the U-shaped pipe are both installed on the first heat pipe end flange.

[0012] The heating pipe is located between the liquid outlet and the main liquid inlet pipe; the branch pipe is located on a side of the main liquid inlet pipe close to the heating pipe and between the end of the heating pipe and the liquid inlet pipe flange.

[0013] The liquid inlet and the liquid outlet are connected to an external pipeline via flanges.

[0014] A liquid discharge port is provided at the bottom of the shell, and the liquid discharge port is connected to a liquid discharge pipe, and a switch valve is provided on the liquid discharge pipe.

[0015] The working principle of the present invention is:

[0016] The liquid heat-conducting medium enters the main liquid inlet pipe and the branch pipe in the heater from the liquid inlet. Under the action of its own pressure, the liquid heat-conducting medium is ejected from the injection holes on the main liquid inlet pipe. Since the holes on the main liquid inlet pipe are evenly distributed, the liquid heat-conducting medium is in full and even contact with the heating tube, thereby enhancing the heat exchange effect. In addition, an injection hole is provided on the branch pipe, which also ejects the liquid heat-conducting medium, pushing the fluid in the cylinder to flow toward the liquid outlet, thereby avoiding overheating caused by the long contact time between the heat-conducting medium and the heating tube, thereby avoiding carbonization caused by overheating of the liquid heat-conducting medium.

[0017] Compared with the prior art, the present invention has the following advantages:

[0018] (1) More uniform heating: By adding a liquid inlet pipe, the fluid in the cylinder is evenly distributed, the turbulence intensity of the flow medium is enhanced, and the heat transfer medium is ensured to be fully and evenly in contact with the heating tube;

[0019] (2) Eliminate scaling: The jet of the branch pipe promotes the flow of the heat transfer medium in the cylinder, so that the heat transfer medium cannot be retained in the cylinder for a long time, thereby eliminating the carbonization phenomenon caused by excessive heating due to medium retention. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the heating device in the present invention;

[0021] Figure 2 It is a schematic diagram of the structure of the injection pipe in the present invention;

[0022] In the figure, 1 is a heating pipe, 2 is a first heat pipe end flange, 3 is a liquid outlet, 4 is a drain port, 5 is a shell, 6 is a main liquid inlet pipe, 7 is a branch pipe, 8 is a second heat pipe end flange, 9 is a liquid inlet, 10 is a spray hole, and 11 is a jet hole. DETAILED DESCRIPTION

[0023] The present invention is described in detail below in conjunction with specific embodiments. The following embodiments will help those skilled in the art to further understand the present invention, but are not intended to limit the present invention in any form. It should be noted that, for those of ordinary skill in the art, several variations and improvements may be made without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0024] Example

[0025] A liquid heat-conducting medium injection pipe and a heating device using the injection pipe, the heating device can effectively prevent dry burning. Figure 1 As shown, the heating device comprises a shell 5, a first heat pipe end flange 2 and a second heat pipe end flange 8 respectively arranged at both ends of the shell 5, a heating pipe 1 installed in the shell 5, and an injection pipe installed in the shell 5 through the second heat pipe end flange 8; a thermocouple is arranged in the heating pipe 1; the injection pipe is installed in the shell 5 of the heating device to provide liquid heat-conducting medium into the shell 5, and the shell 5 is provided with a liquid outlet 3 for the liquid heat-conducting medium to flow out; the injection pipe has a liquid inlet 9, which is the liquid inlet 9 of the heat-conducting medium of the entire heating device. The heating pipe 1 is a U-shaped pipe, and the inlet and outlet of the U-shaped pipe are both installed on the first heat pipe end flange 2; the heating pipe 1 is located between the liquid outlet 3 and the main liquid inlet pipe 6; the branch pipe 7 is located on the side of the main liquid inlet pipe 6 close to the heating pipe 1, and is located between the end of the heating pipe 1 and the liquid inlet pipe flange 9. The liquid inlet 9 and the liquid outlet 3 are connected to the external pipeline through a flange. A liquid discharge port 4 is arranged at the bottom of the shell 5, and the liquid discharge port 4 is connected to the liquid discharge pipe, and a switch valve is arranged on the liquid discharge pipe. In this embodiment, the injection pipe and the cylinder are both made of Q235 steel. The working pressure of the heating device is 0.5 MPa and the design and manufacturing pressure is 1.0 MPa.

[0026] like Figure 1 and Figure 2 As shown, the injection pipe includes a main liquid inlet pipe 6 and a branch pipe 7 which is perpendicular to and connected to the main liquid inlet pipe 6. One end of the main liquid inlet pipe 6 is a closed end, and the other end is a liquid inlet 9 for liquid heat transfer medium to flow in. The closed end is close to the liquid outlet 3. The branch pipe 7 is arranged at a position close to the liquid inlet 9 of the main liquid inlet pipe 6, and injection holes 10 are evenly arranged on the main liquid inlet pipe 6. One end of the branch pipe 7 is a closed end, and the other end is connected to the main liquid inlet pipe 6. A jet hole 11 is provided on the pipe wall of the branch pipe 7 facing the closed end of the main liquid inlet pipe 6.

[0027] Along the axial direction of the main liquid inlet pipe 6, the main liquid inlet pipe 6 is provided with a plurality of injection surfaces which are parallel to each other and arranged at equal distances, and the injection holes 10 are evenly arranged on the circular structure where the injection surface intersects with the main liquid inlet pipe 6. The injection surface is perpendicular to the axial direction of the main liquid inlet pipe 6; each injection surface is provided with 4 injection holes 10, and the corresponding injection holes 10 are located on the same generatrix of the main liquid inlet pipe 6, that is, the four adjacent injection holes 10 are arranged in a rectangular shape.

[0028] In the heating device of this embodiment, the liquid inlet 9 and the liquid outlet 3 are connected to the outside through flanges. The liquid heat-conducting medium enters the main liquid inlet pipe 6 through the liquid inlet 9, and is evenly sprayed on the heating tube 1 through the spray holes 10 on the liquid inlet pipe. At the same time, a part of the liquid heat-conducting medium enters the branch pipe 7, and pushes the liquid heat-conducting medium in the shell 5 to flow toward the liquid outlet through the jet holes 11 on the branch pipe 7.

[0029] The device of this embodiment heats more evenly: by adding a liquid inlet pipe, the fluid in the cylinder is evenly distributed, the turbulence intensity of the flow-conducting medium is enhanced, and it is ensured that the heat-conducting medium is in full and even contact with the heating tube; scaling can be eliminated: the jet of the branch pipe promotes the flow of the fluid in the cylinder, so that the heat-conducting medium cannot be retained in the cylinder for a long time, thereby eliminating the carbonization phenomenon caused by excessive heating due to medium retention.

[0030] The above describes the specific embodiments of the present invention. It should be understood that the present invention is not limited to the above specific embodiments, and those skilled in the art may make various modifications or variations within the scope of the claims, which do not affect the essence of the present invention.

Claims

1. A liquid heat-conducting medium injection pipe, the injection pipe being installed in a shell (5) of a heat exchange device to supply liquid heat-conducting medium into the shell (5), the shell (5) being provided with a liquid outlet (3) for the liquid heat-conducting medium to flow out; It is characterized in that The injection pipe comprises a main liquid inlet pipe (6) and a branch pipe (7) connected to the main liquid inlet pipe (6); one end of the main liquid inlet pipe (6) is a closed end, and the other end is a liquid inlet (9) for the liquid heat-conducting medium to flow in; the closed end is close to the liquid outlet (3); the branch pipe (7) is arranged at a position close to the liquid inlet (9) of the main liquid inlet pipe (6); injection holes (10) are evenly arranged on the main liquid inlet pipe (6); one end of the branch pipe (7) is a closed end, and the other end is connected to the main liquid inlet pipe (6); a jet hole (11) is arranged on the pipe wall of the branch pipe (7) facing the liquid outlet (3); the branch pipe (7) is perpendicular to the main liquid inlet pipe (6), thereby pushing the liquid heat-conducting medium in the shell (5) to flow toward the liquid outlet (3); Along the axial direction of the main liquid inlet pipe (6), the main liquid inlet pipe (6) is provided with a plurality of injection surfaces which are parallel to each other and arranged at equal distances, and the injection holes (10) are evenly arranged on a circular structure where the injection surfaces intersect the main liquid inlet pipe (6).

2. A liquid heat transfer medium injection pipe according to claim 1, It is characterized in that The injection surface is perpendicular to the axial direction of the main liquid inlet pipe (6); and each injection surface is provided with 1 to 6 injection holes (10).

3. A heating device using the liquid heat transfer medium injection pipe according to claim 1, It is characterized in that The invention comprises a shell (5), a first heat pipe end flange (2) and a second heat pipe end flange (8) respectively arranged at two ends of the shell (5), a heating pipe (1) installed in the shell (5), and an injection pipe passing through the second heat pipe end flange (8) and installed in the shell (5); the shell (5) is provided with a liquid outlet (3) for the liquid heat conducting medium to flow out; and a thermocouple is arranged in the heating pipe.

4. A heating device according to claim 3, It is characterized in that The heating pipe (1) is a U-shaped pipe, and the inlet and outlet of the U-shaped pipe are both mounted on the first heat pipe end flange (2).

5. A heating device according to claim 4, It is characterized in that The heating tube (1) is located between the liquid outlet (3) and the main liquid inlet tube (6); the branch tube (7) is located on a side of the main liquid inlet tube (6) close to the heating tube (1), and is located between the end of the heating tube (1) and the liquid inlet (9).

6. A heating device according to claim 5, It is characterized in that The liquid inlet (9) and the liquid outlet (3) are connected to an external pipeline via a flange.

7. A heating device according to claim 5, It is characterized in that A liquid discharge port (4) is provided at the bottom of the housing (5), and the liquid discharge port (4) is connected to a liquid discharge pipe, and a switch valve is provided on the liquid discharge pipe.

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