Oil preheater with high heat conversion efficiency

Abstract

The utility model discloses an oil preheater with high heat conversion efficiency, which comprises a preheating cylinder, end covers are arranged on the side walls of the two ends of the preheating cylinder, an oil inlet pipe and an oil outlet pipe are respectively arranged on the two end covers in a sealing and penetrating manner, an annular filter frame is detachably connected to the oil inlet pipe, a filter screen is arranged in the annular filter frame, and the oil inlet pipe is connected with the oil outlet pipe. A plurality of heat exchange pieces are fixedly connected to the inner side wall of the preheating cylinder at equal intervals, a heating cavity is formed in the preheating cylinder, and an electric heating wire is annularly installed in the heating cavity. The diesel oil preheating device is reasonable in structural design, the circulation time of diesel oil in the preheating cylinder can be prolonged, then the diesel oil can be fully preheated through the inner wall of the preheating cylinder and the heat exchange plates, the heat exchange efficiency is guaranteed, and the diesel oil can be filtered through the filter screen when entering the oil inlet pipe; impurities in the diesel oil are prevented from entering the preheating cylinder and being attached to the inner wall of the preheating cylinder and the heat exchange plate to affect the heat exchange efficiency, and the annular filter frame can be conveniently taken out to clean the filter screen.

Description

Technical Field

[0001] The utility model relates to the technical field of preheaters, in particular to an oil preheater with high heat conversion efficiency. Background Art

[0002] Since diesel contains a certain amount of wax (i.e. normal alkanes, about 15%-30%), these waxes will gradually precipitate when the temperature drops. As long as 0.5-2.0% paraffin wax precipitates and forms wax crystals, these wax crystals will slowly grow and connect with each other through their edges and corners to form a triangular network structure, which absorbs and wraps the low-melting-point oil products, causing the oil products to lose fluidity and solidify the diesel, i.e. wax formation. Therefore, diesel needs to be preheated in low temperature weather.

[0003] During the use of the existing preheater, due to the presence of certain impurities in the diesel, the impurities are easily attached to the inner wall of the preheater, affecting the heat exchange efficiency of the preheater. In addition, when the diesel passes through the preheater, its fast circulation speed will affect the heating of the diesel and affect the preheating effect. For this reason, we designed an oil preheater with high heat conversion efficiency to solve the above problems. Utility Model Content

[0004] The purpose of the utility model is to solve the problems existing in the prior art and to propose an oil preheater with high heat conversion efficiency, which can increase the circulation time of diesel in the preheating cylinder, thereby enabling the diesel to be fully preheated through the inner wall of the preheating cylinder and the heat exchange plate, thereby ensuring the heat exchange efficiency. When the diesel enters the oil inlet pipe, it will be filtered through the filter screen, reducing the impurities in the diesel from entering the preheating cylinder and adhering to the inner wall of the preheating cylinder and the heat exchange plate to affect the heat exchange efficiency. The annular filter frame can be easily removed to clean the filter screen, and the operation is simple.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0006] An oil preheater with high heat conversion efficiency includes a preheating cylinder, end covers are installed on both end walls of the preheating cylinder, an oil inlet pipe and an oil outlet pipe are respectively installed and sealed through the two end covers, an annular filter frame is detachably connected to the oil inlet pipe, a filter screen is installed in the annular filter frame, a plurality of heat exchange elements are fixedly connected to the inner side wall of the preheating cylinder at equal intervals, a heating chamber is provided in the preheating cylinder, and an electric heating wire is installed in a ring shape in the heating chamber.

[0007] Preferably, the inner side wall of the oil inlet pipe is fixedly connected to an annular support plate, the annular filter frame is abutted against the side wall of the annular support plate, the side wall of the annular filter frame is fixedly connected to a pull rod, the side wall of the pull rod is provided with a recess, the side wall of the oil inlet pipe is provided with an installation groove, and a stopper extending into the recess is connected to the installation groove through a rotating shaft.

[0008] Preferably, outer side walls of the oil inlet pipe and the oil outlet pipe are both provided with external threads, and sealing rings are embedded at the ends of the oil inlet pipe and the oil outlet pipe.

[0009] Preferably, the heat exchange element comprises a heat exchange plate fixedly connected to the preheating cylinder, the heat exchange plate is provided with a flow opening, and the flow openings on two adjacent heat exchange plates are staggered in vertical arrangement.

[0010] Preferably, the preheating cylinder and the heat exchange plate are both made of metal materials with good thermal conductivity.

[0011] Preferably, the outer side wall of the preheating cylinder is provided with a thermal insulation layer.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] 1. This oil preheater has high heat conversion efficiency. The electric heating wire heats up the inner wall of the preheating cylinder and the side wall of the heat exchange plate. The diesel entering the preheating cylinder circulates through multiple circulation ports on multiple heat exchange plates, which can increase the circulation time of the diesel in the preheating cylinder. In turn, the diesel can be fully preheated through the inner wall of the preheating cylinder and the heat exchange plate, ensuring heat exchange efficiency.

[0014] 2. This oil preheater has high heat conversion efficiency. When the diesel enters the oil inlet pipe, it will be filtered through the filter to reduce the impurities in the diesel entering the preheating cylinder and adhering to the inner wall of the preheating cylinder and the heat exchange plate to affect the heat exchange efficiency. It is also easy to remove the annular filter frame to clean the filter, and the operation is simple. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the external three-dimensional structure of an oil preheater with high heat conversion efficiency proposed by the utility model;

[0016] Figure 2 for Figure 1 A magnified view of the structure at center A;

[0017] Figure 3 This is a schematic diagram of the top plan structure of an oil preheater with high heat conversion efficiency proposed by the utility model;

[0018] Figure 4 for Figure 3 Schematic diagram of the cross-sectional structure at AA in the middle;

[0019] Figure 5 for Figure 4 Enlarged view of the structure at point B in the middle.

[0020] In the figure: 1. Preheating cylinder; 2. End cover; 3. Oil inlet pipe; 4. Oil outlet pipe; 5. Annular support plate; 6. Annular filter frame; 7. Filter screen; 8. Pull rod; 9. Stop block; 10. Sealing ring; 11. Heating chamber; 12. Electric heating wire; 13. Heat exchange plate; 14. Flow port; 15. Thermal insulation layer. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0022] Reference Figure 1-Figure 5 , an oil preheater with high heat conversion efficiency, including a preheating cylinder 1, end covers 2 are installed on both end walls of the preheating cylinder 1, an oil inlet pipe 3 and an oil outlet pipe 4 are respectively and sealedly installed on the two end covers 2, an annular filter frame 6 is detachably connected to the oil inlet pipe 3, a filter screen 7 is installed in the annular filter frame 6, the filter screen 7 is set to filter the diesel entering the preheating cylinder 1 through the oil inlet pipe 3, filter out impurities in the diesel, and prevent the impurities in the diesel from entering the preheating cylinder 1 and adhering to the inner wall of the preheating cylinder 1 and the heat exchange plate 13, affecting the heat exchange efficiency;

[0023] The filter screen 7 can be cleaned by pulling the pull rod 8 outwards.

[0024] The outer walls of the oil inlet pipe 3 and the oil outlet pipe 4 are both provided with external threads, which facilitate the connection of the oil inlet pipe 3 and the oil outlet pipe 4 to the oil pipe. The ends of the oil inlet pipe 3 and the oil outlet pipe 4 are both embedded with sealing rings 10. The setting of the sealing rings 10 can ensure the sealing between the oil inlet pipe 3 and the oil outlet pipe 4 and the connecting oil pipe;

[0025] The inner wall of the preheating tube 1 is fixedly connected with a plurality of heat exchange elements at equal intervals. The heat exchange elements include a heat exchange plate 13 fixedly connected to the preheating tube 1. The heat exchange plate 13 is provided with a flow opening 14. The flow openings 14 on two adjacent heat exchange plates 13 are staggered vertically, so that when the diesel flows in the preheating tube 1, its circulation time can be increased, so that it is fully heated and preheated. The preheating tube 1 and the heat exchange plate 13 are made of metal material with good thermal conductivity, which is conducive to preheating the diesel.

[0026] A heating chamber 11 is provided in the preheating cylinder 1, and an electric heating wire 12 is installed in a ring shape in the heating chamber 11. The electric heating wire 12 can heat the inner wall of the preheating cylinder 1 and the heat exchange plate 13 to preheat the diesel. The outer wall of the preheating cylinder 1 is provided with a thermal insulation layer 15 to reduce the heat dissipation of the preheating cylinder 1.

[0027] The functional principle of this utility model can be explained through the following operation modes:

[0028] In the utility model, when the oil preheater with high heat conversion efficiency is in use, diesel enters the preheating cylinder 1 through the oil inlet pipe 3 for preheating and is then discharged through the oil outlet pipe 4. When the diesel enters the oil inlet pipe 3, it is filtered through the filter screen 7 to filter out impurities in the diesel, thereby reducing the impurities in the diesel from entering the preheating cylinder 1 and adhering to the inner wall of the preheating cylinder 1 and the heat exchange plate 13 to affect the heat exchange efficiency.

[0029] The electric heating wire 12 heats up the inner wall of the preheating cylinder 1 and the side walls of the heat exchange plates 13. The diesel fuel entering the preheating cylinder 1 circulates through the multiple circulation ports 14 on the multiple heat exchange plates 13. This increases the time the diesel fuel circulates in the preheating cylinder 1 and allows the diesel fuel to be fully preheated by passing through the inner wall of the preheating cylinder 1 and the heat exchange plates 13.

[0030] When the filter screen 7 needs to be cleaned, the stop block 9 is rotated to move it out of the recess to a vertical state. The annular filter frame 6 can be taken out by pulling the pull rod 8 outward to clean the filter screen 7. After cleaning, the annular filter frame 6 is put back into the oil inlet pipe 3 until the annular filter frame 6 is against the side wall of the annular support plate 5. The stop block 9 is rotated to extend it into the recess to fix the pull rod 8, and then the annular filter frame 6 can be fixed, so that the filter screen 7 can continue to perform filtering work.

[0031] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An oil preheater with high heat conversion efficiency, comprising a preheating cylinder (1), characterized in that: End covers (2) are installed on both end side walls of the preheating cylinder (1), and an oil inlet pipe (3) and an oil outlet pipe (4) are respectively installed and sealed through the two end covers (2). An annular filter frame (6) is detachably connected to the oil inlet pipe (3), and a filter screen (7) is installed in the annular filter frame (6). A plurality of heat exchange components are fixedly connected at equal intervals to the inner side wall of the preheating cylinder (1), and a heating chamber (11) is provided in the preheating cylinder (1), and an electric heating wire (12) is installed in the heating chamber (11) in an annular manner.

2. The oil preheater with high heat conversion efficiency according to claim 1, characterized in that: The inner side wall of the oil inlet pipe (3) is fixedly connected to an annular support plate (5), the annular filter frame (6) is in contact with the side wall of the annular support plate (5), the side wall of the annular filter frame (6) is fixedly connected to a pull rod (8), the side wall of the pull rod (8) is provided with a notch, the side wall of the oil inlet pipe (3) is provided with a mounting groove, and a stopper (9) extending into the notch is rotatably connected to the mounting groove via a rotating shaft.

3. The oil preheater with high heat conversion efficiency according to claim 1, characterized in that: The outer side walls of the oil inlet pipe (3) and the oil outlet pipe (4) are both provided with external threads, and the ends of the oil inlet pipe (3) and the oil outlet pipe (4) are both embedded with sealing rings (10).

4. The oil preheater with high heat conversion efficiency according to claim 1, characterized in that: The heat exchange element comprises a heat exchange plate (13) fixedly connected to the preheating cylinder (1), and a flow opening (14) is provided through the heat exchange plate (13). The flow openings (14) on two adjacent heat exchange plates (13) are staggered in vertical arrangement.

5. The oil preheater with high heat conversion efficiency according to claim 4, characterized in that: The preheating cylinder (1) and the heat exchange plate (13) are both made of a metal material with good thermal conductivity.

6. The oil preheater with high heat conversion efficiency according to claim 1, characterized in that: The outer side wall of the preheating cylinder (1) is provided with a heat-insulating layer (15).

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