Heating radiator for dust environment

Abstract

The utility model relates to the technical field of smooth tube radiators, in particular to a heating radiator for a dust environment. The utility model provides a heating radiator for a dust environment. The heating radiator comprises an upper collecting pipe, a lower collecting pipe and a plurality of oval pipes. The upper collecting pipe and the lower collecting pipe are round pipes, and the upper collecting pipe and the lower collecting pipe are arranged in the first direction and extend in the second direction; the cross section of each oval pipe is in an oval shape, the oval pipes are sequentially arranged in the second direction and extend in the first direction, one end of each oval pipe is communicated with the upper collecting pipe, and the other end of each oval pipe is communicated with the lower collecting pipe. Compared with a traditional smooth tube radiator, the horizontal dust accumulation area of the radiator is obviously reduced, the total dust accumulation amount on the surface of the radiator in a dust environment is greatly reduced, the anti-explosion safety is improved, and the radiating effect is good.

Description

Technical Field

[0001] The utility model relates to the technical field of smooth tube radiators, in particular to a heating radiator used in a dusty environment. Background Art

[0002] In industrial buildings where dust is emitted or dust prevention requirements are high, the heating system requires radiators that are easy to clean. For example, the air in the production environment of explosives and their products in the weapons industry may emit gunpowder and explosive dust. These dusts have a high explosion risk and may cause explosions under certain mechanical stimulation energy or gap discharge. Therefore, the deposition of dust on the radiator surface should be minimized, and the dust on the radiator surface should be cleaned and rinsed in time to reduce the risk of explosion accidents. Common columnar radiators or copper tube aluminum fin radiators with fins, steel tube fin radiators or steel plate radiators, etc., are prone to dust adhesion between columns or between fins in dusty environments, which is difficult to clean thoroughly. Long-term accumulation can easily increase the risk of dust fires and explosions. Therefore, they cannot be used for heating in dusty environments in industrial plants.

[0003] At present, the smooth tube radiator is used in this kind of dusty environment. Figure 1 As shown, it includes multiple circular tube-shaped row tubes 7, which are arranged horizontally and arranged in sequence along the vertical direction. A support tube 12 and a vertical pipe 8 are placed between two adjacent row tubes 7. The vertical pipe 8 is connected to the two row tubes 7. The support tube 12 supports and connects the two row tubes 7, but the support tube 12 is not connected to the row tubes 7. Both the support tube 12 and the vertical pipe 8 are circular tubes. A water inlet interface 9 is installed at one end of the top row tube 7, and a drainage interface 10 is installed at one end of the bottom row tube 7. The internal flow channel of this smooth tube radiator is "S"-shaped.

[0004] When the smooth tube radiator is used in a dusty environment, a lot of dust will still accumulate in the upper semicircular part of the tube 7. The cumulative total dust accumulation area of multiple tubes 7 is still relatively large, and the explosion-proof safety and heat dissipation effect need to be improved. Utility Model Content

[0005] (1) The problem to be solved by the present invention is that when the current smooth tube radiator is used in a dusty environment, a lot of dust will still accumulate in the upper semicircular part of the tube, and the cumulative total dust accumulation area of multiple tubes is still relatively large, and the explosion-proof safety and heat dissipation effect need to be improved.

[0006] (2) Technical solution

[0007] A heating radiator for a dusty environment comprises an upper header, a lower header and a plurality of elliptical tubes;

[0008] The upper header and the lower header are circular tubes, and the upper header and the lower header are arranged in a first direction and extend in a second direction;

[0009] The cross section of the elliptical tube is elliptical, and the plurality of elliptical tubes are arranged in sequence along the second direction and extend along the first direction. One end of the elliptical tube is connected to the upper header, and the other end is connected to the lower header.

[0010] The two ends of the upper header are sealed, and the ends are equipped with water inlet pipes connected to the upper header;

[0011] Both ends of the lower header are sealed, and drainage pipes connected to the lower header are installed at the ends;

[0012] The outer surfaces of the upper header, the elliptical tube and the lower header are respectively coated with antistatic and dustproof paint to form an antistatic and dustproof paint film;

[0013] The extension direction of the major axis of the elliptical tube cross section forms a third direction, the extension direction of the minor axis of the elliptical tube cross section is the same as the second direction, and the first direction, the second direction and the third direction are perpendicular to each other.

[0014] According to one embodiment of the present invention, the ratio of the major axis to the minor axis of the cross section of the elliptical tube is greater than 2.

[0015] According to one embodiment of the present invention, the inner diameters of the upper header and the lower header are the same, and the ratio of the cross-sections of the upper header and the elliptical tube is greater than 3.

[0016] According to one embodiment of the present invention, the distance between two adjacent elliptical tubes is not less than 50 mm.

[0017] According to one embodiment of the present invention, a plurality of first connection holes compatible with the elliptical tube are evenly opened along the second direction on the surface of the upper collecting pipe facing the lower collecting pipe; a plurality of second connection holes compatible with the elliptical tube are evenly opened along the second direction on the surface of the lower collecting pipe facing the upper collecting pipe.

[0018] According to one embodiment of the present invention, the thickness of the antistatic and dustproof paint film is ≥120 μm.

[0019] According to one embodiment of the present invention, sealing plates are respectively installed at both ends of the upper header and the lower header, and circular holes are opened on the sealing plates;

[0020] The sealing plates at both ends of the upper header are each connected to a water inlet pipe, and the water inlet pipe is in communication with the circular hole on the sealing plate;

[0021] The sealing plates at both ends of the lower header are each connected with a drainage pipe, and the drainage pipe is communicated with the circular hole on the sealing plate.

[0022] According to one embodiment of the present invention, the upper header and the lower header have the same length, and the length of the upper header is smaller than the length of the elliptical tube.

[0023] Beneficial effects of the utility model:

[0024] The utility model provides a heating radiator for a dusty environment, comprising an upper header, a lower header and a plurality of elliptical tubes; the upper header and the lower header are circular tubes, and the upper header and the lower header are arranged along a first direction and extend along a second direction; the cross-section of the elliptical tube is elliptical, and the plurality of elliptical tubes are arranged in sequence along the second direction, and the elliptical tubes extend along the first direction, one end of the elliptical tube is connected to the upper header, and the other end thereof is connected to the lower header; the two ends of the upper header are sealed, and the end thereof is equipped with a water inlet pipe connected to the upper header; the two ends of the lower header are sealed, and the end thereof is equipped with a drainage pipe connected to the lower header; the outer surfaces of the upper header, the elliptical tube and the lower header are respectively coated with anti-static and dust-proof paint to form an anti-static and dust-proof paint film; the extension direction of the major axis of the elliptical tube cross section forms a third direction, the extension direction of the minor axis of the elliptical tube cross section is the same as the second direction, and the first direction, the second direction and the third direction are perpendicular to each other.

[0025] Since the elliptical tubes are arranged vertically, dust will basically not accumulate on the elliptical tubes, and only a small amount of dust may adhere to them. The main dust accumulation areas of this radiator are basically located in the upper semicircular parts of the upper and lower headers. The change in the length of the vertically arranged elliptical tubes does not affect the total dust accumulation area. Compared with traditional smooth tube radiators, the horizontal dust accumulation area of this radiator is significantly reduced, which greatly reduces the total amount of dust accumulated on the radiator surface in a dusty environment and improves explosion-proof safety. In addition, the outer surfaces of the upper, elliptical tubes and lower headers are respectively coated with anti-static dust-proof paint to form an anti-static dust-proof paint film, which improves the safety of the radiator in dusty environments and its explosion-proof performance in dusty environments. Finally, by keeping the extension direction of the short axis of the elliptical tube cross section the same as the axial direction of the upper header, the number of elliptical tubes can be increased as much as possible in a limited horizontal direction to increase the heat dissipation area of the radiator, thereby increasing the heat dissipation amount and improving the heat dissipation effect. Moreover, the use of elliptical tubes can be arranged in larger numbers than circular tubes, which increases the area of convective heat exchange and further improves the heat dissipation effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0027] Figure 1 Structural diagram of existing smooth tube radiator;

[0028] Figure 2 A front view of an embodiment of the present utility model;

[0029] Figure 3 A top-sectional view of an embodiment of the present invention is provided.

[0030] Icons: 1. Upper manifold; 2. Lower manifold; 3. Oval tube; 4. Closing plate; 5. Water inlet pipe; 6. Drainage pipe; 7. Drain pipe; 8. Vertical pipe; 9. Water inlet interface; 10. Drainage interface; 11. Blocking plate; 12. Support pipe. DETAILED DESCRIPTION

[0031] The following will clearly and completely describe the technical solutions of the present invention in conjunction with the embodiments. Obviously, the embodiments described are only a part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0032] like Figure 2 and Figure 3 As shown, an embodiment of the present invention provides a heating radiator for a dusty environment, comprising an upper header 1, a lower header 2 and a plurality of elliptical tubes 3; the upper header 1 and the lower header 2 are circular tubes, and the upper header 1 and the lower header 2 are arranged in a first direction and extend in a second direction; the cross-section of the elliptical tube 3 is elliptical, and the plurality of elliptical tubes 3 are arranged in sequence along the second direction, and the elliptical tube 3 extends in the first direction, one end of the elliptical tube 3 is connected to the upper header 1, and the other end thereof is connected to the lower header 2; the two ends of the upper header 1 are sealed, and a water inlet pipe 5 connected to the upper header 1 is installed at its end; the two ends of the lower header 2 are sealed, and a drainage pipe 6 connected to the lower header 2 is installed at its end; the outer surfaces of the upper header 1, the elliptical tube 3 and the lower header 2 are respectively coated with anti-static and dust-proof paint to form an anti-static and dust-proof paint film; the extension direction of the major axis of the cross section of the elliptical tube 3 forms a third direction, the extension direction of the minor axis of the cross section of the elliptical tube 3 is the same as the second direction, and the first direction, the second direction and the third direction are perpendicular to each other.

[0033] In this embodiment, the first direction is the vertical direction, the second direction is the horizontal direction, and the third direction is perpendicular to the Figure 2 In the direction of the center page, or the third direction, from the front to the back of the radiator, the minor axis of the cross section of the elliptical tube 3 extends in the same direction as the axis of the upper header 1. That is, the length direction of the upper and lower headers 1 and 2 is the same as the horizontal direction. The upper and lower headers 1 and 2 are arranged in sequence in the vertical direction, with the upper header 1 being higher than the lower header 2. The elliptical tube 3 is vertically arranged between the upper and lower headers 1 and 2, and multiple elliptical tubes 3 are arranged in sequence in the horizontal direction.

[0034] Since the elliptical tube 3 is set vertically, there is basically no dust accumulation on the elliptical tube 3, and only a small amount of dust may adhere to it. The main dust accumulation area of this radiator is basically in the upper semicircular part of the upper header 1 and the lower header 2. The length change of the vertically set elliptical tube 3 does not affect the total dust accumulation area. Figure 1 Compared with the smooth tube radiator in the conventional radiator, the horizontal dust accumulation area of this radiator is significantly reduced, which greatly reduces the total amount of dust accumulated on the radiator surface in a dusty environment and improves explosion-proof safety.

[0035] In addition, in this embodiment, the outer surfaces of the upper collecting pipe 1, the elliptical tube 3 and the lower collecting pipe 2 are respectively coated with anti-static dust-proof paint to form an anti-static dust-proof paint film, which improves the safety of the radiator in a dusty environment and the explosion-proof performance in a dusty environment.

[0036] Finally, the direction of extension of the minor axis of the cross section of the elliptical tube 3 is kept in the same direction as the axis of the upper header 1. The purpose of this arrangement is to increase the number of elliptical tubes 3 as much as possible in the limited horizontal direction to increase the heat dissipation area of the radiator, thereby increasing the heat dissipation and improving the heat dissipation effect. In addition, the number of elliptical tubes 3 can be arranged in greater numbers than that of round tubes. Due to the requirements of surface cleaning in dusty environments, the spacing between elliptical tubes 3 should generally not be less than 50mm. In order to reasonably use the space between the upper header 1 and the lower header 2, the elliptical tubes 3 are arranged in a certain direction. Figure 3 In this way, while ensuring that the spacing between adjacent oval tubes 3 is greater than 50 mm, the number of oval tubes 3 can be increased as much as possible to increase the heat dissipation area of the radiator and increase the total heat dissipation. It should be noted that when the spacing between adjacent oval tubes 3 is greater than 50 mm, it is ensured that a person's hand can freely reach into the back of the oval tube 3 to clean dust and foreign matter, meeting the cleaning requirements in a dusty environment.

[0037] The steel tubes in a radiator primarily heat the air and surrounding environment through convection and direct radiation. The oval tubes 3 in this embodiment have a larger surface area, which increases the area for convection and radiation heat transfer, thereby enhancing heat dissipation. The reason for using oval tubes 3 instead of round tubes in this embodiment is that, while ensuring that the spacing between the steel tubes is greater than 50 mm, a larger number of oval tubes 3 can be arranged than round tubes, thereby increasing the heat dissipation area and the area for convection heat transfer. Furthermore, the oval tubes 3 have a larger surface area, which also increases the area for convection and radiation heat transfer.

[0038] When the existing smooth tube radiator is used in some tall factories with large heat dissipation requirements, it is generally installed horizontally on the wall below the exterior window sill, that is, according to Figure 1 The windowsill is installed in a state where the number of pipes 7 cannot be increased arbitrarily due to the height limitation of the windowsill. In order to increase the total heat dissipation, the length of the pipes 7 can only be increased in the horizontal direction. However, due to the limited length of the space in the horizontal direction, the actual total heat dissipation demand is often unable to be met.

[0039] Existing smooth tube radiators cannot be directly rotated 90° for vertical installation. The main reason is that due to the S-shaped flow channel structure, when installed vertically, the additional gravity head caused by the vertical return of the hot and cold water flow channels increases the circulation resistance, and the water flow rate will be smaller than that of the radiator in the normal horizontal installation direction, thereby reducing the actual heat dissipation effect.

[0040] Therefore, in order to increase the heat dissipation effect, the smooth tube radiator can only be extended in the horizontal direction. However, the longer its horizontal length is, the larger its horizontal dust accumulation area is, resulting in an increase in the total amount of dust accumulation and lower safety of the radiator.

[0041] In contrast, the radiator in this application can be mounted vertically on the wall next to the exterior window sill, rather than underneath the exterior window sill. This allows for more flexible installation locations without being restricted.

[0042] Secondly, the elliptical tubes 3 in this embodiment are vertically oriented, essentially preventing dust accumulation. The length of the elliptical tubes 3 has little effect on the dust accumulation area of the entire radiator. Therefore, in this embodiment, while maintaining a substantially unchanged dust accumulation area, the length of the elliptical tubes 3 can be increased to increase the heat dissipation area of the radiator, thereby increasing the heat dissipation capacity. Alternatively, the number of elliptical tubes 3 can be increased to further increase heat dissipation capacity.

[0043] As a specific embodiment, the ratio of the major axis to the minor axis of the cross section of the elliptical tube 3 is greater than 2. In this embodiment, preferably, the ratio of the major axis to the minor axis of the cross section of the elliptical tube 3 is 2.2-2.5.

[0044] The existing smooth tube radiator has an S-shaped flow channel structure, which makes the water flow resistance in the flow channel relatively large and the total resistance of the radiator relatively large.

[0045] What is different is that in this embodiment, the upper header 1 plays the role of balancing and distributing the flow rate. The water entering the upper header 1 flows evenly to the flow channels of each elliptical tube 3. After completing the heat dissipation, it is evenly gathered to the lower header 2 to flow out. The flow channel is simpler and more direct, the water flow resistance in the flow channel is relatively smaller, and the total resistance of the radiator is smaller.

[0046] In addition, the inner diameters of the upper header 1 and the lower header 2 are the same, and the ratio of the cross-sections of the upper header 1 and the elliptical tube 3 is greater than 3, preferably 4, that is, the cross-sectional area of the elliptical tube 3 is one-fourth of that of the upper header 1, so that the flow velocity in the elliptical tube 3 per unit time is smaller, and the flow velocity in a single elliptical tube 3 can be reduced to 36-47% of the flow velocity in the upper header 1, so that the overall heat dissipation of the radiator is more uniform, thereby ensuring the heat dissipation effect of the elliptical tube 3.

[0047] As an alternative embodiment, the elliptical tube 3 can be replaced by a flat elliptical tube with a flat elliptical cross section.

[0048] As a specific embodiment, Figure 2 As shown, the upper header 1 and the lower header 2 have the same length and are both shorter than the elliptical tube 3. The upper and lower headers 1 and 2 are respectively sealed with sealing plates 4 at both ends, and circular holes are opened on the sealing plates 4; a water inlet pipe 5 is connected to the sealing plates 4 at both ends of the upper header 1, and the water inlet pipe 5 is connected to the circular hole on the sealing plate 4; a drainage pipe 6 is connected to the sealing plates 4 at both ends of the lower header 2, and the drainage pipe 6 is connected to the circular hole on the sealing plate 4.

[0049] Sealing plate 4 is welded from 20# carbon steel, a 6mm-thick circular steel plate. Its diameter is 15mm larger than the outer diameters of the upper and lower headers 1 and 2. Depending on the pipe connection direction, sealing plate 4 can be opened at either end and welded with DN15-DN25mm steel pipes as hot water inlet and outlet ports. The ports are standard G1 / 2', G3 / 4', and G1' externally threaded, allowing connection to external heating pipes.

[0050] As an optional embodiment, sealing plates 4 are respectively installed at both ends of the upper and lower headers 1, 2. The sealing plate 4 at the left end of the upper header 1 seals the left opening of the upper header 1, and a water inlet pipe 5 is installed on the sealing plate 4 at the right end of the upper header 1. A drainage pipe 6 is connected to the sealing plates 4 at both ends of the lower header 2.

[0051] It should be noted that the surface resistivity of the paint film is a key performance indicator of antistatic coatings. Too high a surface resistivity is not conducive to the conduction of static electricity, while too low a surface resistivity is likely to cause discharge risks. When the surface resistivity of the paint film is controlled at 1×10 6 ~10 8Ω range, it has good antistatic performance. Therefore, the surface resistivity of the antistatic and dustproof paint film in this embodiment is controlled to be 1×10 6 ~10 8 Ω range. In addition, it is generally believed that when the liquid contact angle on the paint film surface is greater than 90°, it is hydrophobic, which is conducive to the cleaning and flushing of dust. When the liquid contact angle is ≥100°, a "lotus leaf effect" will be formed on the surface, which is convenient for the cleaning and flushing of dust, has good dustproof performance, and reduces the risk of dust-induced explosion or combustion. Therefore, the surface liquid contact angle of the anti-static dustproof paint film in this embodiment is at least greater than 90°. Furthermore, the total thickness of the anti-static dustproof paint film is ≥120μm, and the heat-resistant temperature of the paint film coating is 200±20℃.

[0052] It should be noted that the elliptical tube 3, the upper header 1 and the lower header 2 are all made of 20# carbon steel. The bottom surface of the upper header 1 is evenly provided with a plurality of first connecting holes along the axial direction of the upper header 1, and the top surface of the lower header 2 is evenly provided with a plurality of second connecting holes along the axial direction of the lower header 2. The top end of the elliptical tube 3 is sealedly connected to the first connecting hole, and the bottom end thereof is sealedly connected to the second connecting hole.

[0053] Optionally, the outer diameters of the upper and lower headers are 108 mm to 159 mm, and the elliptical tube 3 has three specifications: 90 mm*40 mm, 100 mm*40 mm, and 120 mm*50 mm.

[0054] In the description of this utility model, it should be noted that the terms "upper" and "lower" and other terms indicating orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0055] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, an indirect connection through an intermediate medium, or a connection between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances. In addition, in the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0056] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A heating radiator for dusty environment, characterized in that: It comprises an upper header (1), a lower header (2) and a plurality of elliptical tubes (3); The upper header (1) and the lower header (2) are circular tubes, and the upper header (1) and the lower header (2) are arranged in a first direction and extend in a second direction; The cross section of the elliptical tube (3) is elliptical, and a plurality of the elliptical tubes (3) are arranged in sequence along the second direction, and the elliptical tubes (3) extend along the first direction, one end of the elliptical tube (3) is connected to the upper header (1), and the other end is connected to the lower header (2); Both ends of the upper header (1) are sealed, and a water inlet pipe (5) connected to the upper header (1) is installed at the end thereof; Both ends of the lower header (2) are sealed, and drainage pipes (6) connected to the lower header (2) are installed at the ends; The outer surfaces of the upper header (1), the elliptical tube (3) and the lower header (2) are respectively coated with antistatic and dustproof paint to form an antistatic and dustproof paint film; The extension direction of the major axis of the cross section of the elliptical tube (3) forms a third direction, the extension direction of the minor axis of the cross section of the elliptical tube (3) is the same as the second direction, and the first direction, the second direction and the third direction are perpendicular to each other.

2. A heating radiator for a dusty environment according to claim 1, characterized in that: The ratio of the major axis to the minor axis of the cross section of the elliptical tube (3) is greater than 2.

3. The heating radiator for dusty environment according to claim 1, characterized in that: The inner diameters of the upper header (1) and the lower header (2) are the same, and the ratio of the cross-sections of the upper header (1) and the elliptical tube (3) is greater than 3.

4. The heating radiator for dusty environment according to claim 1, characterized in that: The distance between two adjacent elliptical tubes (3) is not less than 50 mm.

5. The heating radiator for dusty environment according to claim 1, characterized in that: A plurality of first connection holes compatible with the elliptical tube (3) are evenly provided on the surface of the upper collecting pipe (1) facing the lower collecting pipe (2) along the second direction; a plurality of second connection holes compatible with the elliptical tube (3) are evenly provided on the surface of the lower collecting pipe (2) facing the upper collecting pipe (1) along the second direction.

6. The heating radiator for dusty environment according to claim 1, characterized in that: The thickness of the antistatic and dustproof paint film is ≥120 μm.

7. The heating radiator for dusty environment according to claim 1, characterized in that: Sealing plates (4) are respectively installed at both ends of the upper header (1) and the lower header (2) in a sealed manner, and circular holes are opened on the sealing plates (4); The sealing plates (4) at both ends of the upper header (1) are each connected to a water inlet pipe (5), and the water inlet pipe (5) is in communication with the circular hole on the sealing plate (4); The sealing plates (4) at both ends of the lower header (2) are each connected to a drainage pipe (6), and the drainage pipe (6) is communicated with the circular hole on the sealing plate (4).

8. The heating radiator for dusty environment according to claim 1, characterized in that: The upper header (1) and the lower header (2) have the same length, and the length of the upper header (1) is smaller than the length of the elliptical tube (3).

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