Transfer air passage of negative pressure exhaust pipeline

Abstract

The utility model discloses a transfer air passage of a negative pressure exhaust pipeline. The transfer air passage comprises a relatively-closed narrow and long cavity, an air inlet and a fixed air outlet, wherein the air inlet is formed in the cavity wall of one side face of the cavity and can move in the length direction, and the fixed air outlet is formed in the cavity wall of the other side face of the cavity. The long and narrow space is defined by an annular belt arranged on the two rotating wheels in a sleeving mode, the upper cover plate and the lower cover plate cover the upper end opening and the lower end opening of the long and narrow space respectively, the belt can conduct reciprocating transmission under the action of force in the length direction of the cavity, and the air inlet is formed in the portion, on the front side or the rear side, of the belt. And the air outlet is formed in the upper cover plate or the lower cover plate. The flue gas transfer device has the advantages that the flue gas generated by a movable processing point (gas source) can be fed into the transfer gas passage without a lengthy and bent flexible pipeline between the flue gas transfer device and the movable gas source, and then is discharged through a fixed gas outlet; the structure is simple and installation is convenient.

Description

Technical Field

[0001] The utility model relates to a transfer airway of an exhaust pipeline and belongs to the technical field of indoor mechanical processing environmental protection. Background Art

[0002] A type of indoor mobile processing equipment will generate a large amount of smoke or dust at the processing point. For example, when a high-temperature cutting device is used to move and cut large plates indoors, a large amount of smoke and dust will be continuously generated at the cutting point. These smoke and dust will diffuse in the workshop and seriously affect the health of workers. Since the cutting equipment needs to move back and forth over long distances in the longitudinal and transverse directions during cutting, if a flexible exhaust pipe is used to follow the equipment to drag back and forth, the long and curved flexible exhaust pipe will block the moving route of the equipment, the flexible exhaust pipe will be damaged during repeated dragging, and the exhaust will be poor due to multiple bends in the flexible exhaust pipe, which is extremely difficult to implement. In order to reduce the harm of indoor smoke, the current practice is to install exhaust fans on the walls of the workshop and to open the doors and windows of the workshop to promote indoor air circulation and reduce the smoke concentration. Its defects are: there is still a certain concentration of smoke in the room, which cannot be completely removed, and the exhaust fans are large in power, large in number, and consume too much energy. Utility Model Content

[0003] To solve the above problems, our company has developed a negative pressure exhaust pipeline (patent protection was applied for on the same day) that can collect and discharge smoke and dust at mobile work points when the equipment is moved, without the need for long flexible pipelines.

[0004] The technical problem to be solved by the utility model is: how to set a transfer airway for a negative pressure exhaust pipeline which is stationary relative to an output air pipe which reciprocates in a straight line.

[0005] How to collect and discharge the smoke generated by cutting to the outside without affecting the mobile operation of the equipment.

[0006] In view of the above problems, the technical solution proposed by the utility model is:

[0007] A transit airway of a negative pressure exhaust pipeline comprises a relatively closed narrow and long cavity, an air inlet arranged on a cavity wall on one side of the cavity and movable along the length direction, and a fixed air outlet arranged on the cavity wall on the other side.

[0008] The cavity is formed by a narrow space surrounded by an annular belt mounted on two rotating wheels and an upper cover plate and a lower cover plate respectively covering the upper and lower ports of the narrow space. The belt can reciprocate under the action of a force along the length direction of the cavity. The air inlet is arranged on the front or rear side of the belt, and the air outlet is arranged on the upper cover plate or the lower cover plate.

[0009] The upper cover plate is provided with upper shaft holes at both ends, and the lower cover plate is provided with lower shaft holes at both ends. One rotating wheel is installed in the upper shaft hole at one end of the upper cover plate and in the lower shaft hole of one section of the lower cover plate through the rotating shafts at both ends, and the other rotating wheel is installed in the upper shaft hole at the other end of the upper cover plate and in the lower shaft hole of the other section of the lower cover plate through the rotating shafts at both ends.

[0010] The upper cover plate is close to the upper side of the belt, and the lower cover plate is close to the lower side of the belt.

[0011] The air inlet is connected to a rigid air supply pipe, and the reciprocating motion of the rigid air supply pipe along the length direction of the cavity drives the reciprocating transmission of the belt.

[0012] The negative pressure source comes from the air outlet pipe connected to the air outlet. Beneficial Effects

[0013] 1. There is no need for a long and curved flexible pipe between the mobile gas source, and the smoke generated by the mobile processing point (gas source) can be sent to the transfer air duct and then discharged through the fixed outlet.

[0014] 2. Simple structure and easy installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The figure is a three-dimensional schematic diagram of the transfer airway assembly, in which the part indicated by the curved arrow is partially cut away;

[0016] Figure 2 The three-dimensional schematic diagram of the transfer airway after the upper cover plate and the lower cover plate are hidden;

[0017] Figure 3 is a three-dimensional schematic diagram of the upper cover plate;

[0018] Figure 4 is a three-dimensional schematic diagram of the lower cover plate;

[0019] Figure 5 A three-dimensional schematic diagram of a rigid air supply pipe installed at the air inlet of the transit air duct.

[0020] In the figure: 1, belt; 2, pulley; 201, shaft; 3, upper cover plate; 301, upper shaft hole; 4, lower cover plate; 401, lower shaft hole; 5, cavity; 6, air inlet; 7, air outlet; 8, air supply pipe. DETAILED DESCRIPTION

[0021] The utility model is further described below in conjunction with the accompanying drawings:

[0022] like Figure 1As shown, a transit air duct of a negative pressure exhaust pipeline includes a relatively closed narrow and long cavity 5, an air inlet 6 that can move along the length direction and is arranged on the cavity wall of one side of the cavity 5, and a fixed air outlet 7 that is arranged on the cavity wall of another side. When in use, the transit air duct is arranged parallel to the moving route of the gas source, and the air supply pipe 8 is connected between the air inlet 6 and the gas source. The gas source can be a smoke collection hood fixed on the cutting machine head. When the cutting machine head moves back and forth, the air inlet 6 is driven to move back and forth synchronously with the gas source. Within the length range of the cavity 5, the distance between the air inlet 6 and the gas source will not change, and the air supply pipe 8 does not need to be a long and curled flexible pipe. No matter which section the air inlet 6 moves to, the smoke entering the air inlet 6 is in the cavity 5 and can be discharged through the fixed air outlet 7. Here, the relatively closed refers to that a tiny gap is allowed between the components constituting the cavity 5. Due to the negative pressure exhaust, in addition to allowing the smoke to enter the cavity 5, a small amount of external gas is also allowed to enter the cavity 5 and then be discharged together with the smoke.

[0023] like Figure 1 As shown in FIG. 4 , the cavity 5 is formed by a narrow space surrounded by an annular belt 1 sleeved on two rotating wheels 2 and an upper cover plate 3 and a lower cover plate 4 respectively covering the upper and lower ends of the narrow space. The belt 1 can reciprocate under the action of a force along the length direction of the cavity 5. The air inlet 6 is arranged on the front or rear side of the belt 1, and the air outlet 7 is arranged on the upper cover plate 3 or the lower cover plate 4. The two rotating wheels 2 play the role of controlling the shape of the space surrounded by the belt 1 and at the same time facilitate the reciprocating transmission of the belt 1. When the belt 1 is reciprocating, the rotating wheel 2 rotates forward and backward.

[0024] Upper shaft holes 301 are respectively provided at both ends of the upper cover plate 3, and lower shaft holes 401 are respectively provided at both ends of the lower cover plate 4. One wheel 2 is installed in the upper shaft hole 301 at one end of the upper cover plate 3 and in the lower shaft hole 401 at one section of the lower cover plate 4 through the shafts 201 at both ends, and another wheel 2 is installed in the upper shaft hole 301 at the other end of the upper cover plate 3 and in the lower shaft hole 401 at another section of the lower cover plate 4 through the shafts 201 at both ends. The upper cover plate 3 is close to the upper side of the belt 1, and the lower cover plate 4 is close to the lower side of the belt 1, but a small gap is allowed between the belt 1 and the upper cover plate 3 and the lower cover plate 4.

[0025] like Figure 5 As shown, the air inlet 6 is connected to a rigid air supply pipe 8, and the reciprocating motion of the rigid air supply pipe 8 along the length direction of the cavity 5 drives the reciprocating transmission of the belt 1. For example, one end of the rigid air supply pipe 8 is fixed to the head of the cutting machine, and the other end is connected to the belt at the edge of the air inlet 6. When the head of the cutting machine moves, the rigid air supply pipe 8 drives the belt 1 to move synchronously.

[0026] The negative pressure source comes from the air outlet pipe connected to the air outlet 7, that is, a suction fan is installed at the air outlet end of the air outlet pipe, and negative pressure can be formed in the cavity 5 by starting the fan.

[0027] It should be noted here that when large-scale cutting equipment is cutting, it needs to move longitudinally and transversely, and usually two transfer air ducts are needed. One transfer air duct is set horizontally, and the random head is set on the longitudinally moving rack, and moves longitudinally and longitudinally together. The other transfer air duct is set longitudinally and fixed next to the site. A rigid pipe is set between the transfer air duct set horizontally on the rack and the transfer air duct set longitudinally next to the site. In this way, the transfer air duct set horizontally on the rack becomes the air source for the transfer air duct set longitudinally next to the site.

[0028] The above-mentioned implementation modes are only used to more clearly describe the present invention, and cannot be regarded as limiting the protection scope of the present invention. Any modifications in equivalent forms shall be regarded as falling within the protection scope of the present invention.

Claims

1. A transit airway of a negative pressure exhaust pipeline, characterized in that: It comprises a relatively closed narrow and long cavity (5), an air inlet (6) arranged on a cavity wall on one side of the cavity (5) and movable along the length direction, and a fixed air outlet (7) arranged on the cavity wall on the other side.

2. The transit airway of the negative pressure exhaust pipeline according to claim 1, characterized in that: The cavity (5) is formed by a narrow space surrounded by an annular belt (1) sleeved on two rotating wheels (2) and an upper cover plate (3) and a lower cover plate (4) respectively covering the upper and lower ends of the narrow space; the belt (1) can be reciprocated under the action of a force along the length direction of the cavity (5); the air inlet (6) is arranged on the front side or the rear side of the belt (1); and the air outlet (7) is arranged on the upper cover plate (3) or the lower cover plate (4).

3. The transit airway of the negative pressure exhaust pipeline according to claim 2, characterized in that: The upper cover plate (3) is provided with upper shaft holes (301) at both ends, and the lower cover plate (4) is provided with lower shaft holes (401) at both ends. One rotating wheel (2) is installed in the upper shaft hole (301) at one end of the upper cover plate (3) and in the lower shaft hole (401) at one section of the lower cover plate (4) through the rotating shafts (201) at both ends, and the other rotating wheel (2) is installed in the upper shaft hole (301) at the other end of the upper cover plate (3) and in the lower shaft hole (401) at the other section of the lower cover plate (4) through the rotating shafts (201) at both ends.

4. The transit airway of the negative pressure exhaust pipeline according to claim 2 or 3, characterized in that: The upper cover plate (3) is in close contact with the upper side of the belt (1), and the lower cover plate (4) is in close contact with the lower side of the belt (1).

5. The transit airway of the negative pressure exhaust pipeline according to claim 2, characterized in that: The air inlet (6) is connected to a rigid air supply pipe (8), and the reciprocating motion of the rigid air supply pipe (8) along the length direction of the cavity (5) drives the reciprocating transmission of the belt (1).

6. The transit airway of the negative pressure exhaust pipeline according to any one of claims 1 to 3, characterized in that: The negative pressure source comes from the air outlet pipe connected to the air outlet (7).

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