Novel exhaust fume collecting hood for calender

Abstract

The utility model discloses a novel exhaust fume collecting hood for a calender, which comprises a front rectangular side plate, an arc-shaped top plate, a left fan-shaped side plate and a right fan-shaped side plate, oil receiving grooves are formed in the lower parts of the inner walls of the front rectangular side plate, the arc-shaped top plate, the left fan-shaped side plate and the right fan-shaped side plate. According to the utility model, the principle is scientific, the structure is simple, the smoke outlet is formed in the front side, and the top plate and the rear side plate of the smoke collecting hood adopt a smooth structure with an arc-shaped inner surface formed by extending the arc-shaped top plate backwards, so that oil drops are prevented from being generated on the top of the inner wall of the smoke collecting hood and dropping on PVC materials, and the quality of a calendered PVC film is ensured. Meanwhile, the oil receiving grooves are formed in the lower portions of the side plates, oil drops collected through the side plates and the inner end opening of the smoke exhaust pipe drop into the oil receiving grooves and are prevented from flowing downwards to the ground along the calender, and the workshop environment sanitation is kept.

Description

Technical Field

[0001] The utility model belongs to the technical field of PVC calendering production, and particularly relates to a novel smoke collecting hood for a calendering machine. Background Art

[0002] During the production process of PVC calendered film, when the PVC compound is wrapped around the front roller, upper roller, middle roller and lower roller to be calendered out, the PVC film will produce thick DOP oil smoke under high temperature. The DOP oil smoke must be organized through the smoke collection hood installed on the top of the four-roller calender and enter the oil fume purification equipment through the exhaust pipe connected to the exhaust port. The current smoke collection hood has the following problems:

[0003] 1) The smoke hood is a conical shell with a small top and a large bottom. There is a smoke exhaust port on the top of the smoke hood. When the smoke contacts the metal smoke hood, the smoke is cooled and condensed into oil droplets. The dust on the surface of the calender will also condense with the smoke, so the oil droplets are turbid. In particular, the oil droplets at the smoke exhaust port will drip onto the PVC material in the first material accumulation area between the upper roller and the front roller, directly or indirectly contaminating the PVC film, or forming oil spots on the PVC film, which greatly affects the quality of the PVC film.

[0004] 2) The condensed oil flows along the inner wall of the fume hood to the surface of the calender, and continues to flow down along the outer wall of the calender to the ground, polluting the workshop environment.

[0005] Therefore, there is an urgent need to optimize and improve the structure of the existing smoke hood. Utility Model Content

[0006] In order to solve the above technical problems existing in the prior art, the utility model provides a new type of fume hood for a calendering machine which has a reasonable structure, prevents condensed oil droplets from dripping easily, and collects the condensed oil droplets to avoid environmental pollution.

[0007] In order to solve the above technical problems, the utility model adopts the following technical solutions: a new type of smoke collecting hood for a calender, comprising a front rectangular side panel, an arc-shaped top panel, a left fan-shaped side panel and a right fan-shaped side panel, the front side of the arc-shaped top panel is connected to the top edge of the front rectangular side panel, the front side of the left fan-shaped side panel is connected to the left edge of the front rectangular side panel, the front side of the right fan-shaped side panel is connected to the right edge of the front rectangular side panel, the arc side of the left fan-shaped side panel is connected to the left arc side of the arc-shaped top panel, and the right fan-shaped side panel is connected to the right edge of the front rectangular side panel. The curved edge of the side panel is connected to the curved edge on the right side of the curved top panel, and a smoke exhaust pipe joint is connected to the middle position of the upper part of the front rectangular side panel. The lower sides of the curved top panel, the left fan-shaped side panel and the right fan-shaped side panel are of the same height, and the lower side of the front rectangular side panel is lower than the lower side of the curved top panel. A front oil connection groove is provided at the lower part of the inner wall of the front rectangular side panel, a rear oil connection groove is provided at the lower part of the inner wall of the curved top panel, a left oil connection groove is provided at the lower part of the inner wall of the left fan-shaped side panel, and a right oil connection groove is provided at the lower part of the inner wall of the right fan-shaped side panel.

[0008] The rear end of the smoke exhaust pipe joint protrudes from the inner side of the front rectangular side panel. A rectangular window for passing the swing conveyor is opened at the bottom of the front rectangular side panel. The front oil trough includes a middle section, a left section and a right section. The middle section is located above the rectangular window. The length of the middle section is greater than the length of the rectangular window. The left section is located on the left side of the lower part of the rectangular window, and the right section is located on the right side of the lower part of the rectangular window.

[0009] The outer sides of the front rectangular side panel, the arc-shaped top panel, the left fan-shaped side panel and the right fan-shaped side panel are all fixed with reinforcing ribs, wherein the reinforcing ribs on the outer side of the arc-shaped top panel are arranged in the middle of the arc-shaped top panel and are arc-shaped.

[0010] The lower sides of the left sector-shaped side plate and the right sector-shaped side plate are provided with slots for accommodating the upper roller lifting reducer, and the left oil connecting groove and the right oil connecting groove are both horizontally arranged above the slots.

[0011] By adopting the above technical solution, compared with the existing technology, the utility model has the following beneficial effects:

[0012] (1) The smoke exhaust port is set at the front side of the smoke hood, so as to prevent the oil droplets condensed at the smoke exhaust port from falling onto the PVC material in the first material accumulation area between the upper roller and the front roller.

[0013] (2) The top plate and rear side plate of the smoke hood are replaced by a whole piece of curved top plate, which has a good guiding effect on the oil smoke. The condensed oil droplets will flow down along the inner wall of the curved top plate to the rear oil tank.

[0014] (3) The reinforcing ribs of each panel of the smoke hood are set on the outside, so that the inner wall can be smooth without bulges, and oil droplets can be avoided as much as possible. The middle of the curved top plate is provided with curved reinforcing ribs along the height direction to prevent the middle part of the curved top plate from bulging downward and avoid the formation of oil droplets.

[0015] (4) The left and right fan-shaped side panels are extended downward to reserve slots for accommodating the upper roller lifting reducer. This increases the sealing area, reduces the amount of smoke escaping, and makes it difficult for cold air to enter.

[0016] (5) The rear end of the exhaust pipe joint protrudes from the inner surface of the front rectangular side panel (about 10mm). The oil droplets condensed in the exhaust pipe joint and at the pipe mouth will gather at the lower edge of the rear end of the exhaust pipe joint and drip into the middle section of the front oil tank. Since a rectangular window is reserved at the bottom of the front rectangular side panel for passing the swing conveyor, the front oil tank is divided into three sections arranged in a triangular shape, with the middle section located above the rectangular window.

[0017] (6) A rectangular window is reserved at the bottom of the front rectangular side panel for passing the swing conveyor, which can be fully enclosed to prevent cold air from entering the cover through the rectangular window or escaping and polluting the environment.

[0018] In summary, the utility model principle science, simple structure, smoke outlet is set up in front side, the top plate and rear side plate of fume collecting hood adopt a arc top plate to extend to form the smooth structure of the inner surface of arc surface backward, avoid the oil drop in fume collecting hood inner wall top to drop to PVC material, ensure the quality of calendered PVC film. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is the front structure schematic diagram of the utility model;

[0020] Figure 2 It is Figure 1 Left view of it;

[0021] Figure 3 It is Figure 1 Top view of it;

[0022] Figure 4 It is the schematic diagram of the utility model installation to four roll calender. DETAILED DESCRIPTION

[0023] The embodiment of the utility model is further described in detail below in combination with the drawings and examples.

[0024] Figures 1-4 As shown in the figure, the utility model discloses a novel fume collecting hood for calender, which comprises a front rectangular side plate 1, an arc top plate 2, a left fan-shaped side plate 3 and a right fan-shaped side plate 4, the front side edge of the arc top plate 2 is connected with the top edge of the front rectangular side plate 1, the front side edge of the left fan-shaped side plate 3 is connected with the left side edge of the front rectangular side plate 1, the front side edge of the right fan-shaped side plate 4 is connected with the right side edge of the front rectangular side plate 1, the arc-shaped edge of the left fan-shaped side plate 3 is connected with the left side arc-shaped edge of the arc top plate 2, the arc-shaped edge of the right fan-shaped side plate 4 is connected with the right side arc-shaped edge of the arc top plate 2, a smoke pipe joint 5 is connected to the upper middle position of the front rectangular side plate 1, the lower side edges of the arc top plate 2, the left fan-shaped side plate 3 and the right fan-shaped side plate 4 are consistent in height, the lower side edge of the front rectangular side plate 1 is lower than the lower side edge of the arc top plate 2, a front oil collecting groove 6 is arranged on the inner wall lower part of the front rectangular side plate 1, a rear oil collecting groove 7 is arranged on the inner wall lower part of the arc top plate 2, a left oil collecting groove 8 is arranged on the inner wall lower part of the left fan-shaped side plate 3, and a right oil collecting groove 9 is arranged on the inner wall lower part of the right fan-shaped side plate 4.

[0025] The rear end of the smoke pipe joint 5 protrudes from the inner side of the front rectangular side plate 1, a rectangular window 11 for passing through a swing conveyor 10 is arranged on the bottom of the front rectangular side plate 1, the front oil collecting groove 6 comprises a middle section 12, a left side section 13 and a right side section 14, the middle section 12 is located above the rectangular window 11, the length of the middle section 12 is greater than the length of the rectangular window 11, the left side section 13 is located on the left side below the rectangular window 11, and the right side section 14 is located on the right side below the rectangular window 11.

[0026] The outer side of the front rectangular side plate 1, the arc-shaped top plate 2, the left fan-shaped side plate 3 and the right fan-shaped side plate 4 is fixedly provided with a reinforcing rib 15, wherein the reinforcing rib 15 of the outer side of the arc-shaped top plate 2 is arranged at the middle part of the arc-shaped top plate 2 and is arc-shaped.

[0027] The lower side edge of the left fan-shaped side plate 3 and the right fan-shaped side plate 4 is provided with a slot 17 for accommodating an upper roller lifting speed reducer 16, and the left oil groove 8 and the right oil groove 9 are both horizontally arranged above the slot 17.

[0028] The technical scheme of the utility model has the following beneficial effects:

[0029] (1) The smoke exhaust port is arranged at the front side of the smoke collecting hood, so that the oil drops condensed at the smoke exhaust port can be prevented from falling on the PVC material in the first material accumulation area between the upper roller and the front roller.

[0030] (2) The top plate and the rear side plate of the smoke collecting hood are replaced by an integral arc-shaped top plate 2, which has a good guiding effect on the oil fume, and the condensed oil drops can flow downwards along the inner wall of the arc-shaped top plate 2 and into the rear oil groove 7.

[0031] (3) The reinforcing ribs 15 of each plate of the smoke collecting hood are arranged at the outer side, so that the inner wall is smooth without protrusions, and oil drops are avoided as much as possible. The arc-shaped reinforcing rib 15 is arranged in the middle of the arc-shaped top plate 2 along the height direction, so as to prevent the middle part of the arc-shaped top plate 2 from being concave and to avoid the formation of oil drops.

[0032] (4) The left fan-shaped side plate 3 and the right fan-shaped side plate 4 are extended downwards, and the slot 17 for accommodating the upper roller lifting speed reducer 16 is reserved, so that the sealing area is increased, the amount of smoke escaping is reduced, and cold air is not easy to enter.

[0033] (5) The rear end of the smoke exhaust pipe joint 5 protrudes from the inner side of the front rectangular side plate 1 (about 10 mm), and the oil drops condensed in the smoke exhaust pipe joint 5 and the pipe opening can be collected to the lower part of the rear end edge of the smoke exhaust pipe joint 5 and then dropped into the middle section 12 of the front oil groove 6. Since the bottom of the front rectangular side plate 1 is provided with a rectangular window 11 for passing through the swing conveyor 10, the front oil groove 6 is divided into three sections in a triangular shape, and the middle section 12 is arranged above the rectangular window 11.

[0034] (6) The bottom of the front rectangular side plate 1 is provided with a rectangular window 11 for passing through the swing conveyor 10, which can be fully closed to prevent cold air from entering the shell through the rectangular window 11 or delaying the escape of pollution to the environment.

[0035] The above examples illustrate the basic principles and characteristics of the present application, but the above only illustrates the preferred embodiments of the present application, and is not limited by the described embodiments. Those skilled in the art can make many forms of deformation and improvement under the inspiration of the present patent without departing from the purpose of the present application and the scope protected by the claims, which all belong to the protection scope of the present application. Therefore, the present application patent and the protection scope should be subject to the appended claims.

Claims

1. A new type of fume hood for a calender, characterized by: It includes a front rectangular side panel, a curved top panel, a left fan-shaped side panel and a right fan-shaped side panel, the front side of the curved top panel is connected to the top edge of the front rectangular side panel, the front side of the left fan-shaped side panel is connected to the left edge of the front rectangular side panel, the front side of the right fan-shaped side panel is connected to the right edge of the front rectangular side panel, the curved side of the left fan-shaped side panel is connected to the left curved side of the curved top panel, the curved side of the right fan-shaped side panel is connected to the right curved side of the curved top panel, a smoke exhaust pipe joint is connected to the middle position of the upper part of the front rectangular side panel, the lower sides of the curved top panel, the left fan-shaped side panel and the right fan-shaped side panel are of the same height, the lower side of the front rectangular side panel is lower than the lower side of the curved top panel, a front oil connecting groove is provided at the lower part of the inner wall of the front rectangular side panel, a rear oil connecting groove is provided at the lower part of the inner wall of the curved top panel, a left oil connecting groove is provided at the lower part of the inner wall of the left fan-shaped side panel, and a right oil connecting groove is provided at the lower part of the inner wall of the right fan-shaped side panel.

2. The novel fume hood for a calender according to claim 1, characterized in that: The rear end of the smoke exhaust pipe joint protrudes from the inner side of the front rectangular side panel. A rectangular window for passing the swing conveyor is opened at the bottom of the front rectangular side panel. The front oil trough includes a middle section, a left section and a right section. The middle section is located above the rectangular window. The length of the middle section is greater than the length of the rectangular window. The left section is located on the left side of the lower part of the rectangular window, and the right section is located on the right side of the lower part of the rectangular window.

3. A new type of fume hood for a calender according to claim 1 or 2, characterized in that: The outer sides of the front rectangular side panel, the arc-shaped top panel, the left fan-shaped side panel and the right fan-shaped side panel are all fixed with reinforcing ribs, wherein the reinforcing ribs on the outer side of the arc-shaped top panel are arranged in the middle of the arc-shaped top panel and are arc-shaped.

4. A new type of fume hood for a calender according to claim 1 or 2, characterized in that: The lower sides of the left sector-shaped side plate and the right sector-shaped side plate are provided with slots for accommodating the upper roller lifting reducer, and the left oil connecting groove and the right oil connecting groove are both horizontally arranged above the slots.

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