Suck-back prevention device of suction dryer

Abstract

The utility model relates to an anti-suck-back device of a suction dryer, and particularly relates to the technical scheme that the anti-suck-back device comprises an air inlet pipeline, a positioning block is movably installed in an inner cavity of the air inlet pipeline, air leakage grooves are symmetrically formed in the two sides of the positioning block, guide pipelines are symmetrically installed on the two sides of the air inlet pipeline, and fixing assemblies are symmetrically installed on the inner wall of the air inlet pipeline. The suction drying machine has the advantages that when the suction drying machine is started to generate adsorption force, the adsorption force firstly adsorbs and pulls the positioning block and the sealing baffle to move, so that the first exhaust groove and the second exhaust groove leak out, when air enters the air inlet pipeline, the air flows into the inner side of the positioning block and is guided into the first exhaust groove through the air leakage groove, and the air leakage is avoided. And then the air is guided into the tail end of the air inlet pipeline through the guide pipeline and the second exhaust groove, finally, the air is sucked by the suction dryer, and when the suction dryer stops, the positioning block and the sealing baffle return to original positions, so that the positioning block and the sealing baffle can block the first exhaust groove and the second exhaust groove, and water drops are prevented from dripping through the air inlet pipeline.

Description

Technical Field

[0001] The utility model relates to the field of back-suction prevention of a dryer, and in particular to a back-suction prevention device of a dryer. Background Art

[0002] Adsorption dryer is an adsorption dryer. Adsorption dryer uses advanced chemical technology. Its principle is to use the difference in volume between water and air molecules to filter out saturated water vapor in compressed air using a molecular sieve specially designed for gas purification. Water molecules can be easily adsorbed in the molecular sieve particles, and then the molecular sieve can be restored by regeneration method. The dew point of compressed air can easily reach -40℃. When using the adsorption dryer, air needs to be sucked into the machine through the air intake pipe to dry it.

[0003] However, when the dryer is working, there will be water droplets remaining in the air inlet duct. After the dryer stops working, these water droplets will be sucked back due to the pressure difference between the inside of the dryer and the outside world, causing the water droplets to fall into the external environment and affect the cleanliness of the surroundings.

[0004] Therefore, it is necessary to invent a back-suction prevention device for a suction dryer. Utility Model Content

[0005] The purpose of the utility model is to solve the problems raised in the above background technology.

[0006] In order to achieve the above-mentioned purpose, the utility model provides the following technical solutions: an anti-backflow device of a dryer, comprising an air intake pipe, a positioning block is movably installed in the inner cavity of the air intake pipe, air leakage grooves are symmetrically opened on both sides of the positioning block, guide pipes are symmetrically installed on both sides of the air intake pipe, fixing components are symmetrically installed on the inner wall of the air intake pipe, a sewage pipe is installed at the middle lower end of the guide pipe, and a sealing cap is installed at the lower end of the sewage pipe;

[0007] The surfaces of both sides of the air intake duct are symmetrically provided with a first exhaust groove and a second exhaust groove.

[0008] Based on the above characteristics: when the dryer starts to generate adsorption force, the adsorption force will first absorb and pull the positioning block and the sealing baffle to move, causing the first exhaust groove and the second exhaust groove to leak out. When the air enters the inside of the air intake duct, the air will flow into the inside of the positioning block and be introduced into the first exhaust groove through the leakage groove, and then be introduced into the end of the air intake duct through the guide duct and the second exhaust groove. Finally, the air will be sucked into the dryer. When the dryer stops, the positioning block and the sealing baffle will return to their original positions, so that the positioning block and the sealing baffle can block the first exhaust groove and the second exhaust groove to prevent water droplets from dripping through the air intake duct.

[0009] Preferably, the positioning block is a rectangular structure with one end sealed and the other end open.

[0010] Based on the above features: one end of the positioning block is set as an opening to facilitate air to enter the inner side of the positioning block and then leak through the air leakage groove, while one end of the positioning block is set as a seal to prevent air from flowing directly through the positioning block.

[0011] Preferably, connecting rods are symmetrically installed on both sides of one end of the positioning block, a permanent magnet A is installed on the outside of the end of the connecting rod close to the positioning block, and a sealing baffle is installed on the side of the end of the connecting rod away from the positioning block.

[0012] Based on the above features: when the positioning block is not pulled by the adsorption force, the positioning block can block the first exhaust groove, and the sealing baffle can block the second exhaust groove; when the positioning block is pulled backward, the positioning block can use the leakage groove to align with the first exhaust groove, and the sealing baffle will also be staggered with the second exhaust groove, so as to facilitate the flow of air through the guide duct.

[0013] Preferably, the diameter of the sealing baffle is larger than that of the second exhaust groove.

[0014] Based on the above features: it is convenient for the sealing baffle to seal the second exhaust groove, so as to avoid gas leakage caused by the sealing baffle having a diameter smaller than the second exhaust groove.

[0015] Preferably, the guide pipe is a concave structure, and both ends of the guide pipe are aligned with the first exhaust groove and the second exhaust groove.

[0016] Based on the above features: air is introduced into the interior of the guide pipe through the first exhaust groove, then flows through the guide pipe, and finally is exhausted through the second exhaust groove.

[0017] Preferably, the fixing assembly includes an L-shaped fixing seat and a supporting base plate installed at the lower end of the L-shaped fixing seat, a permanent magnet B is installed in the middle of one end of the L-shaped fixing seat, and a through hole is opened in the middle of the permanent magnet B.

[0018] Based on the above characteristics: when the positioning block is not pulled by the adsorption force, the permanent magnet B will bounce off the permanent magnet A, so that the sealing baffle reaches the inner side of the L-shaped fixed seat and the supporting bottom plate to seal the second exhaust groove, and the positioning block will also move to the first exhaust groove to seal it. When the positioning block is pulled by the adsorption force, the permanent magnet A will gradually approach the permanent magnet B. At this time, the positioning block and the sealing baffle will also be displaced, causing the first exhaust groove and the second exhaust groove to leak. Once the adsorption force disappears, the permanent magnet B will bounce off the permanent magnet A again, so that the positioning block and the sealing baffle return to their original positions.

[0019] Preferably, a movable through hole is provided in the middle of one end of the L-shaped fixing seat close to the permanent magnet B, and the movable through hole is aligned with the through hole.

[0020] Based on the above features: the connecting rod passes through the movable perforation and the through hole, so that the positioning block drives the sealing baffle to move back and forth through the connecting rod.

[0021] The beneficial effects of the utility model are:

[0022] 1. When the dryer starts to generate adsorption force, the adsorption force will first attract and pull the positioning block and the sealing baffle to move, causing the first exhaust groove and the second exhaust groove to leak out. When the air enters the inside of the air intake duct, the air will flow into the inside of the positioning block and be introduced into the first exhaust groove through the leakage groove, and then be introduced into the end of the air intake duct through the guide duct and the second exhaust groove. Finally, the air will be sucked into the dryer. When the dryer stops, the positioning block and the sealing baffle will return to their original positions, so that the positioning block and the sealing baffle can block the first exhaust groove and the second exhaust groove to prevent water droplets from dripping through the air intake duct.

[0023] 2. The guide pipe has a concave structure, which facilitates the air to be introduced into the guide pipe through the first exhaust groove, and then flow through the guide pipe and be discharged through the second exhaust groove. If some water droplets remain in the guide pipe, the sealing cap at the lower end of the sewage pipe can be opened to allow the water droplets to be discharged through the sewage pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A schematic diagram of the air intake duct structure of a desiccant dryer provided by the utility model;

[0025] Figure 2 A diagram showing a positioning block of a dryer provided by the utility model in an extended state;

[0026] Figure 3 A diagram showing the retracted state of a positioning block of a dryer provided by the utility model;

[0027] Figure 4 A schematic diagram of the structure of a positioning block of a drying machine provided by the utility model;

[0028] Figure 5 The utility model provides a structural schematic diagram of a fixing assembly of a desiccant machine.

[0029] In the figure: 1. air intake pipe; 11. first exhaust groove; 12. second exhaust groove; 2. positioning block; 21. connecting rod; 22. permanent magnet A; 23. sealing baffle; 3. leakage groove; 4. guide pipe; 5. fixing assembly; 51. L-shaped fixing seat; 52. supporting bottom plate; 53. permanent magnet B; 54. through hole; 6. drain pipe; 7. sealing cap. DETAILED DESCRIPTION

[0030] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0031] See attached Figure 1-5 The utility model provides an anti-backflow device for a dryer, comprising an air intake pipe 1, a positioning block 2 is movably installed in the inner cavity of the air intake pipe 1, air leakage grooves 3 are symmetrically opened on both sides of the positioning block 2, guide pipes 4 are symmetrically installed on both sides of the air intake pipe 1, a fixing component 5 is symmetrically installed on the inner wall of the air intake pipe 1, a sewage pipe 6 is installed at the middle lower end of the guide pipe 4, and a sealing cap 7 is installed at the lower end of the sewage pipe 6;

[0032] A first exhaust groove 11 and a second exhaust groove 12 are symmetrically formed on both side surfaces of the air intake duct 1 .

[0033] The air intake duct 1 is installed at the air intake end on one side of the dryer (the dryer is not shown in the figure, and it is a known device, so the details are not repeated). When the dryer is started to generate adsorption force, the adsorption force will first absorb and pull the positioning block 2 to move. At this time, the positioning block 2 will move backward to cause the first exhaust groove 11 and the second exhaust groove 12 to leak out. At this time, the adsorption force will generate a diversion through the second exhaust groove 12 and the guide duct 4, and generate a negative pressure suction force through the first exhaust groove 11. When air enters the interior of the air intake duct 1, the air will flow into the inner side of the positioning block 2 and be introduced into the first exhaust groove through the leakage groove 3. 11, and then introduced into the end of the air intake duct 1 through the guide duct 4 and the second exhaust groove 12, and finally the air will be sucked into the dryer. When the dryer stops, the fixing component 5 will quickly rebound the positioning block 2 due to the disappearance of the adsorption force, so that the positioning block 2 blocks the first exhaust groove 11 and the second exhaust groove 12. At this time, if the dryer has a backflow situation, since the first exhaust groove 11 and the second exhaust groove 12 are blocked, the water droplets cannot drip through the air intake duct 1, and the water droplets remaining in the guide duct 4 can open the sealing cap 7, so that the water droplets are discharged through the drain pipe 6.

[0034] Preferably, the positioning block 2 is a rectangular structure with one end sealed and the other end open.

[0035] One end of the positioning block 2 is set as an opening to facilitate air to enter the inner side of the positioning block 2 and then leak through the air leakage groove 3, while one end of the positioning block 2 is set as a seal to prevent air from flowing directly through the positioning block 2.

[0036] Preferably, connecting rods 21 are symmetrically installed on both sides of one end of the positioning block 2, a permanent magnet A22 is installed on the outside of the end of the connecting rod 21 close to the positioning block 2, and a sealing baffle 23 is installed on the side of the end of the connecting rod 21 away from the positioning block 2.

[0037] The positioning block 2 utilizes the connecting rod 21 to movably penetrate the fixed component 5, so that the positioning block 2 can move in parallel. When the positioning block 2 is not pulled by the adsorption force, the positioning block 2 can block the first exhaust groove 11, and the sealing baffle 23 can block the second exhaust groove 12. When the positioning block 2 is pulled backward, the positioning block 2 can utilize the leakage groove 3 to align with the first exhaust groove 11, and the sealing baffle 23 will also be staggered with the second exhaust groove 12, so as to facilitate the flow of air through the guide pipe 4.

[0038] Preferably, the diameter of the sealing baffle 23 is larger than that of the second exhaust groove 12 .

[0039] The sealing baffle 23 can be used to seal the second exhaust groove 12 to prevent gas leakage caused by the diameter of the sealing baffle 23 being smaller than the second exhaust groove 12.

[0040] Preferably, the guide pipe 4 is a concave structure, and two ends of the guide pipe 4 are aligned with the first exhaust groove 11 and the second exhaust groove 12 .

[0041] The air is introduced into the interior of the guide duct 4 through the first exhaust groove 11 , then flows through the guide duct 4 , and finally is exhausted through the second exhaust groove 12 .

[0042] Preferably, the fixing assembly 5 includes an L-shaped fixing seat 51 and a supporting base plate 52 installed at the lower end of the L-shaped fixing seat 51, a permanent magnet B53 is installed in the middle of one end of the L-shaped fixing seat 51, and a through hole 54 is opened in the middle of the permanent magnet B53.

[0043] Since the magnetic poles of the permanent magnet A22 and the permanent magnet B53 are opposite and in a state of mutual repulsion, when the positioning block 2 is not pulled by the adsorption force, the permanent magnet B53 will bounce off the permanent magnet A22, so that the sealing baffle 23 reaches the inner side of the L-shaped fixed seat 51 and the supporting bottom plate 52 to block the second exhaust groove 12, and the positioning block 2 will also move to the first exhaust groove 11 to seal it. When the positioning block 2 is pulled by the adsorption force, the permanent magnet A22 will gradually approach the permanent magnet B53. At this time, the positioning block 2 and the sealing baffle 23 will also be displaced, causing the first exhaust groove 11 and the second exhaust groove 12 to leak. Once the adsorption force disappears, the permanent magnet B53 will bounce off the permanent magnet A22 again, so that the positioning block 2 and the sealing baffle 23 return to their original positions.

[0044] Preferably, a movable through hole is opened in the middle of one end of the L-shaped fixing seat 51 close to the permanent magnet B53, and the movable through hole is aligned with the through hole 54.

[0045] The connecting rod 21 passes through the movable through hole and the through hole 54 , so that the positioning block 2 drives the sealing baffle 23 to move back and forth through the connecting rod 21 .

[0046] The use process of the utility model is as follows: when the dryer is started to generate adsorption force, the adsorption force will first absorb and pull the positioning block 2 to move, at this time the permanent magnet A22 will gradually approach the permanent magnet B53, so that the positioning block 2 can use the leakage groove 3 to align with the first exhaust groove 11, and the sealing baffle 23 will also be staggered with the second exhaust groove 12 to leak it out, at this time the adsorption force will generate a diversion through the second exhaust groove 12 and the guide pipe 4, and generate a negative pressure suction force through the first exhaust groove 11, when the air enters the interior of the intake pipe 1, the air will flow into the inner side of the positioning block 2, and is introduced into the first exhaust groove 11 through the leakage groove 3, and then through the guide pipe 4 and the second exhaust The groove 12 is introduced into the end of the air intake duct 1, and finally the air will be sucked into the dryer. When the dryer stops, the permanent magnet B53 will rebound the permanent magnet A22, so that the positioning block 2 and the sealing baffle 23 return to their original positions. At this time, the sealing baffle 23 will block the second exhaust groove 12 on the inner side of the L-shaped fixing seat 51 and the supporting bottom plate 52, and the positioning block 2 will also move to the position of the first exhaust groove 11 to seal it. At this time, if the dryer has a backflow situation, since the first exhaust groove 11 and the second exhaust groove 12 are blocked, water droplets cannot drip through the air intake duct 1, and the water droplets remaining in the guide duct 4 can open the sealing cap 7 to allow the water droplets to be discharged through the drain pipe 6.

[0047] The above is only a preferred embodiment of the utility model. Any person skilled in the art may modify the utility model by using the above technical solution or modify it into an equivalent technical solution. Therefore, any simple modification or equivalent replacement based on the technical solution of the utility model shall fall within the scope of protection claimed by the utility model.

Claims

1. A back-suction prevention device for a desiccant dryer, comprising an air intake duct (1), characterized in that: A positioning block (2) is movably installed in the inner cavity of the air intake pipe (1), and air leakage grooves (3) are symmetrically provided on both sides of the positioning block (2). Guide pipes (4) are symmetrically installed on both sides of the air intake pipe (1), and fixing components (5) are symmetrically installed on the inner wall of the air intake pipe (1). A sewage pipe (6) is installed at the middle lower end of the guide pipe (4), and a sealing cap (7) is installed at the lower end of the sewage pipe (6); The surfaces of both sides of the air intake pipe (1) are symmetrically provided with a first exhaust groove (11) and a second exhaust groove (12).

2. The anti-backflow device of the desiccant dryer according to claim 1, characterized in that: The positioning block (2) is a rectangular structure with one end sealed and the other end open.

3. The anti-backflow device of the desiccant dryer according to claim 1, characterized in that: Connecting rods (21) are symmetrically mounted on both sides of one end of the positioning block (2); a permanent magnet A (22) is mounted on the outside of the end of the connecting rod (21) close to the positioning block (2); and a sealing baffle (23) is mounted on the side of the end of the connecting rod (21) away from the positioning block (2).

4. The anti-backflow device of the desiccant dryer according to claim 3, characterized in that: The sealing baffle (23) has a diameter greater than that of the second exhaust groove (12).

5. The anti-backflow device of the desiccant dryer according to claim 1, characterized in that: The guide pipe (4) is a concave-shaped structure, and two ends of the guide pipe (4) are aligned with the first exhaust groove (11) and the second exhaust groove (12).

6. The anti-backflow device of the desiccant dryer according to claim 1, characterized in that: The fixing assembly (5) comprises an L-shaped fixing seat (51) and a supporting base plate (52) mounted at the lower end of the L-shaped fixing seat (51); a permanent magnet B (53) is mounted in the middle of one end of the L-shaped fixing seat (51); and a through hole (54) is provided in the middle of the permanent magnet B (53).

7. The anti-backflow device of the desiccant dryer according to claim 6, characterized in that: A movable through hole is provided in the middle of one end of the L-shaped fixing seat (51) close to the permanent magnet B (53), and the movable through hole is aligned with the through hole (54).

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