CN219390675U - Flow guiding pipe for heat exchanger - Google Patents

Abstract

The utility model relates to the technical field of heat exchangers, and discloses a flow guide pipe for a heat exchanger, which comprises a rear fixing plate, a front fixing plate, fins and a flow guide pipe, wherein the fins are equidistantly arranged between the rear fixing plate and the front fixing plate, the flow guide pipe is U-shaped, two arms of the flow guide pipe sequentially penetrate through the rear fixing plate, the fins and the front fixing plate and extend to one side, away from the fins, of the front fixing plate, and a valve flow blocking structure is arranged in the flow guide pipe. Through setting up first valve and second valve, when cold water flows back to the inside of honeycomb duct from the delivery port, rivers can disperse into mainstream and tributary, and the tributary can merge with the mainstream again under the blocking of second valve, forms the vortex, and the kinetic energy of mainstream and reposition of redundant personnel offset each other, and resistance reinforcing to reduce the velocity of flow of water, finally rivers can flow from the water inlet with very slow velocity of flow, can avoid the interior water pressure of honeycomb duct too big and make the pipe wall of honeycomb duct break.

Description

Flow guiding pipe for heat exchanger

Technical Field

The utility model relates to the technical field of heat exchangers, in particular to a honeycomb duct for a heat exchanger.

Background

A heat exchanger is a device for transferring heat from a hot water stream to a cold water stream, and is mainly a device for meeting the requirements of a specified process, and is an industrial application of convection heat transfer and heat conduction. The existing new energy automobile adopts a fin type heat exchanger which is mainly used for heating air in a drying system, is main equipment in a hot air device, adopts a heat medium which can be steam or hot water, and achieves the heat transfer process by introducing the hot water or steam into a flow guide pipe of the fin type heat exchanger, and fins on the surface have the effect of enhancing heat transfer.

However, the flow guide tube of the conventional fin type heat exchanger is usually not divided into the forward and reverse directions, cold water can flow back from the water outlet and be output from the water inlet, and when a large amount of cold water flows back, the hot water output device connected to the water inlet of the heat exchanger is damaged due to the influence of the cold water.

Disclosure of Invention

The present utility model is directed to a flow guide tube for a heat exchanger, which solves the above-mentioned problems in the prior art.

In order to achieve the above purpose, the present utility model provides the following technical solutions:

the utility model provides a honeycomb duct for heat exchanger, includes back fixed plate, preceding fixed plate, fin and honeycomb duct, the fin equidistance set up in back fixed plate with between the fixed plate before, the honeycomb duct is the U-shaped, just the both arms of honeycomb duct run through in proper order back fixed plate the fin with preceding fixed plate and extend to the preceding fixed plate deviates from one side of fin, the inside of honeycomb duct is provided with valve choked flow structure.

As still further aspects of the utility model: the valve choked flow structure comprises a first valve and a second valve, wherein the first valve and the second valve are fixedly connected to the inner surfaces of two arms of the flow guide pipe at equal intervals, the first valve and the second valve are arranged in a splayed shape, the first valve and the second valve are alternately arranged, and the distance between the adjacent first valve and the second valve is the same.

As still further aspects of the utility model: the first valve is shorter than the second valve, the splayed bottom end of the first valve is not contacted with the inner wall of the flow guide pipe, and the splayed bottom end of the second valve is fixedly connected with the inner wall of the flow guide pipe.

As still further aspects of the utility model: the U-shaped arms of the flow guide pipe are a water inlet and a water outlet respectively, the splayed top ends of the first valve and the second valve face the water outlet, and the splayed bottom ends of the first valve and the second valve face the water inlet.

As still further aspects of the utility model: the rear fixing plate and the front fixing plate are fixedly connected with a mounting plate on the same side surface, and mounting screw holes are formed in the surface of the mounting plate.

Compared with the prior art, the utility model has the beneficial effects that:

1. through setting up first valve and second valve, the eight characters bottom of first valve and second valve is towards the water inlet, set up first valve and second valve and can block the backward flow of rivers, when cold water flows back to the inside of honeycomb duct from the delivery port, rivers can disperse into mainstream and tributary under the jam of first valve and second valve, the tributary can merge with the mainstream again under the jam of second valve backward flow, form the vortex, the kinetic energy of mainstream and reposition of redundant personnel offset each other, make the resistance bigger more powerful, thereby reduce the velocity of flow of water, under the jam of multiunit first valve and second valve, final rivers can flow from the water inlet with extremely slow velocity of flow, effectively avoid hot water output equipment to receive a large amount of cold water in the twinkling of an eye and damage, simultaneously also can avoid the intraductal water pressure of honeycomb duct too big and make the pipe wall of honeycomb duct break.

2. When the water flow enters from the water inlet, the main flow is formed at the central position, a branch flow is formed between the first valve, the second valve and the inner wall of the flow guide pipe, and the direction of the branch flow is the same as that of the main flow, so that the resistance born by the water flow can be almost ignored, the water flow can easily pass through, after the hot water enters the water inlet, the hot water can normally flow, and the heat exchange process between the hot water and the heat exchanger can be ensured.

Drawings

FIG. 1 is a schematic view of a flow guide tube for a heat exchanger;

FIG. 2 is a schematic cross-sectional view taken along the direction A-A in FIG. 1;

FIG. 3 is a schematic view of a flow guide tube in a flow guide tube for a heat exchanger in half-section;

FIG. 4 is a schematic illustration of the flow of water in the flow conduit in the forward direction for a heat exchanger;

fig. 5 is a diagram showing the flow of water in the flow guide tube for heat exchanger in the opposite direction.

In the figure: 1. a rear fixing plate; 2. a front fixing plate; 3. a fin; 4. a mounting plate; 5. installing a screw hole; 6. a flow guiding pipe; 7. a first valve; 8. a second valve; 9. a water inlet; 10. and a water outlet.

Detailed Description

Referring to fig. 1 to 5, in an embodiment of the present utility model, a flow guiding tube for a heat exchanger includes a rear fixing plate 1, a front fixing plate 2, fins 3 and a flow guiding tube 6, wherein the fins 3 are equidistantly disposed between the rear fixing plate 1 and the front fixing plate 2, the flow guiding tube 6 is U-shaped, two arms of the flow guiding tube 6 sequentially penetrate through the rear fixing plate 1, the fins 3 and the front fixing plate 2 and extend to one side of the front fixing plate 2 away from the fins 3, and a valve flow blocking structure is disposed inside the flow guiding tube 6.

Preferably, the valve choke structure comprises a first valve 7 and a second valve 8, the first valve 7 and the second valve 8 are fixedly connected to the inner surfaces of two arms of the flow guide pipe 6 at equal intervals, the first valve 7 and the second valve 8 are arranged in a splayed shape, the first valve 7 and the second valve 8 are alternately arranged, the adjacent first valve 7 and the second valve 8 are spaced at the same interval, the first valve 7 is shorter than the second valve 8, the splayed bottom end of the first valve 7 is not contacted with the inner wall of the flow guide pipe 6, the splayed bottom end of the second valve 8 is fixedly connected with the inner wall of the flow guide pipe 6, the two U-shaped arms of the flow guide pipe 6 are respectively provided with a water inlet 9 and a water outlet 10, the splayed top ends of the first valve 7 and the second valve 8 face the water outlet 10, the splayed bottom ends of the first valve 7 and the second valve 8 face the water inlet 9, the first valve 7 and the second valve 8 can block reverse flow of water, when cold water flows back from the flow guide pipe 6 to the inner part of the flow guide pipe 6, the flow rate of the water can be slowed down under the blocking of the first valve 7 and the second valve 8, finally the splayed bottom end of the first valve 7 and the splayed bottom of the second valve 8 can flow out from the water guide pipe 9 and the water guide pipe 6 at the water inlet 9 and the water outlet 6 can be prevented from being broken by the large pressure inside the pipe wall.

Preferably, the same side surfaces of the rear fixing plate 1 and the front fixing plate 2 are fixedly connected with a mounting plate 4, and mounting screw holes 5 are formed in the surface of the mounting plate 4 and used for mounting and fixing the heat exchanger.

The working principle of the utility model is as follows: when the flow guide pipe for the heat exchanger is used, only water can be fed in a single reverse direction, when water flows enter from the water inlet 9, the water flows are in a convergence state under the blocking of the first valve 7 and the second valve 8, in the convergence state, the water flows form a main flow at the central position, branch flows are formed among the first valve 7, the second valve 8 and the inner wall of the flow guide pipe 6, the directions of the branch flows are the same as the directions of the main flows, so that the resistance of the water flows can be almost ignored, the water flows can easily pass through, and after hot water enters the water inlet 9, the hot water can normally flow to perform heat exchange; when water enters from the water outlet 10, the water flow is in a dispersed state under the blocking of the first valve 7 and the second valve 8, a main flow is formed at the central position of the water flow, a branch flow is formed between the first valve 7, the second valve 8 and the inner wall of the flow guide pipe 6, the branch flow reversely flows under the blocking of the second valve 8, at the moment, the branch flow is combined with the main flow to form vortex, the kinetic energy of the main flow and the kinetic energy of the branch flow are mutually counteracted, so that the resistance is larger and stronger, the pressure of the water flow in the dispersed state can be increased along the flow direction, the flow velocity of water particles is reduced along with the gradual increase of the pressure, the reflux is caused by each group of the first valve 7 and the second valve 8, the vortex repeatedly occurs, the flow velocity of the water flow is further reduced, the water flow is difficult to continuously flow, the cold water can be prevented from reversely flowing from the water outlet 10, but the cold water can not be completely blocked from flowing from the water inlet 9, and the pipe wall of the flow guide pipe 6 can be effectively prevented from being broken due to the excessive pressure of the water in the flow guide pipe 6.

The foregoing description is only a preferred embodiment of the present utility model, but the scope of the present utility model is not limited thereto, and any person skilled in the art, who is within the scope of the present utility model, should make equivalent substitutions or modifications according to the technical solution of the present utility model and the inventive concept thereof, and should be covered by the scope of the present utility model.

Claims (5)

1. The utility model provides a honeycomb duct for heat exchanger, includes back fixed plate (1), preceding fixed plate (2), fin (3) and honeycomb duct (6), its characterized in that: the fin (3) equidistance set up in between back fixed plate (1) with preceding fixed plate (2), honeycomb duct (6) are the U-shaped, just the both arms of honeycomb duct (6) run through in proper order back fixed plate (1), fin (3) with preceding fixed plate (2) and extend to preceding fixed plate (2) deviates from one side of fin (3), the inside of honeycomb duct (6) is provided with valve choked flow structure.

2. A draft tube for a heat exchanger according to claim 1 wherein: the valve flow blocking structure comprises a first valve (7) and a second valve (8), wherein the first valve (7) and the second valve (8) are fixedly connected to the inner surfaces of two arms of the flow guide pipe (6) at equal intervals, the first valve (7) and the second valve (8) are arranged in a splayed mode, the first valve (7) and the second valve (8) are alternately arranged, and the distances between the adjacent first valve (7) and the adjacent second valve (8) are the same.

3. A draft tube for a heat exchanger according to claim 2 wherein: the first valve (7) is shorter than the second valve (8), the splayed bottom end of the first valve (7) is not in contact with the inner wall of the flow guide pipe (6), and the splayed bottom end of the second valve (8) is fixedly connected with the inner wall of the flow guide pipe (6).

4. A draft tube for a heat exchanger according to claim 3 wherein: the U-shaped two arms of the flow guide pipe (6) are a water inlet (9) and a water outlet (10) respectively, the splayed top ends of the first valve (7) and the second valve (8) face the water outlet (10), and the splayed bottom ends of the first valve (7) and the second valve (8) face the water inlet (9).

5. A draft tube for a heat exchanger according to claim 1 wherein: the rear fixing plate (1) and the front fixing plate (2) are fixedly connected with a mounting plate (4) on the same side surface, and mounting screw holes (5) are formed in the surface of the mounting plate (4).