Yankee gas hood for papermaking drying

Abstract

The utility model relates to the technical field of papermaking, in particular to a Yankee gas hood for papermaking drying, which comprises an outer hood wrapped on the periphery of a Yankee drying cylinder, and a space for paper to pass through is reserved between the outer hood and the Yankee drying cylinder. And the two heat supply assemblies are arranged in the outer cover in a mirroring manner. Due to the fact that the paper is conveyed from left to right, when the second heat distribution part is in an open state, airflow entering the uniform heat channel from the opening just dries the paper at the paper inlet, and meanwhile heat entering the uniform heat channel from the second heat distribution part can dry the paper in a second procedure. Due to the fact that the convection phenomenon exists when airflow of the second heat distribution part and the first heat distribution part enters the heat uniformizing channel, heat hedging can enlarge the airflow disturbance range on the surface of paper, heating is uniform, meanwhile, moisture generated by the paper can be conducted to the outer side, and after the moisture is blocked by the side baffles, the moisture is always collected at an inlet.

Description

TECHNICAL FIELD

[0001] The utility model relates to papermaking technical field especially relates to a papermaking drying's yankee gas cover. BACKGROUND

[0002] Papermaking drying's yankee gas cover is the important equipment that papermaking process is used with yankee dryer (Yankee Dryer) matching, is widely used in the production of household paper. Its main function is through to the paper surface provides efficient hot air drying, further accelerates water evaporation, and significantly improves drying efficiency and product quality.

[0003] Yankee gas cover relies on high temperature hot air drying, needs a large amount of fuel (such as natural gas or fuel oil) to provide heat source, especially at high speed production, energy consumption increases significantly, when drying the paper of relatively narrow, also adopt the same heat supply mode, and the difficulty of internal moisture discharge. UTILITY MODEL CONTENT

[0004] The utility model discloses a papermaking drying's yankee gas cover, solve the problem of background art.

[0005] To realize above-mentioned purpose, the utility model provides the following technical scheme: a papermaking drying's yankee gas cover, comprising:

[0006] The outer cover is wrapped around the periphery of the yankee dryer, and a space for accommodating the paper is reserved between the outer cover and the yankee dryer;

[0007] Two heat supply components are mirror image arranged in the outer cover, and the heat supply components are used to generate heat and flow into the space through the first heat distribution part and the heat supply component;

[0008] A cylinder peripheral plate is arranged in the outer cover, and the cylinder peripheral plate is formed integrally with the outer cover, and side baffles are arranged on the front and rear sides of the cylinder peripheral plate;

[0009] The heat supply component includes a heat flow cylinder, the bottom of the heat flow cylinder is fixedly connected with the first heat distribution part, a space for the second heat distribution part to move is arranged on the first heat distribution part, the second heat distribution part is movably arranged on the first heat distribution part, one side of the second heat distribution part is attached to the heat supply component, and the other side of the second heat distribution part is used to adjust the caliber size of the uniform heat passage inlet on the cylinder peripheral plate.

[0010] Further, a center heating device for adjusting air flow intensity is arranged at the center position of the heat flow cylinder inner cavity, a pressure pump is arranged outside the center heating device, an arc-shaped embedding groove is arranged on one side of the heat flow cylinder, a plurality of heat source distribution openings are formed in the inner wall of the embedding groove, and a plurality of flow distribution holes are arranged at the bottom of the inner wall of the heat flow cylinder.

[0011] The setting of the heat supply assembly can adjust the rotating speed of the external pressurizing pump through the rotating speed of the Yankee dryer, the width of the paper, the thickness of the paper and the material of the paper, so that the flow rate of the air flow input into the heat flow cylinder can be adjusted, at this time, the heat output from the first heat supply part and the heat conduction of the second heat supply part are also adjusted synchronously, so that the heat gathered on the surface of the paper is increased, and the drying efficiency of the paper is further improved;

[0012] It is worth pointing out that, since the paper is conveyed from left to right, when the second heat supply part is opened, the air flow entering the uniform heat channel through the opening can dry the paper at the entrance of the paper, at the same time, the heat entering the uniform heat channel through the second heat supply part can dry the paper in the second procedure, since the air flow entering the uniform heat channel through the second heat supply part and the first heat supply part has a convection phenomenon, so that the heat shock can increase the range of air flow disturbance on the surface of the paper, and the paper can be heated uniformly and the moisture generated by the paper can be conducted outward, so that the moisture is always collected at the entrance after being blocked by the side baffle;

[0013] As to why the air flow conducts the moisture to the position of the entrance of the paper, since the opening is provided, the power of the air flow is weakened, and a narrow channel is formed between the uniform heat channel and the heat gathering opening for increasing the speed of the air flow, so that the air flow with high initial speed can discharge the moisture outward.

[0014] Further, the first heat supply part comprises a cover sleeve, a plurality of shunt pipes are arranged in the cover sleeve, the plurality of shunt pipes are communicated with the uniform heat channel through the opening, a shunt opening is further arranged on the cover sleeve, a heat gathering opening is arranged at the tail end of the shunt opening and communicated with the opening, a guide opening is arranged on the inner wall of the shunt opening and connected with the heat gathering opening, and the guide opening is used to limit the rotating amplitude of the second heat supply part.

[0015] The first heat supply part is arranged to build a heat flow channel with the peripheral plate of the cylinder body, for uniformly gathering heat, so that the heat can be distributed on the surface of the paper as much as possible with less loss, in addition, when the heat flows outward, the shunt pipe can shunt the heat into the opening, so that the heat is gathered in the opening and dispersed uniformly through the uniform heat channel, the shunt opening is a groove with the same shape as the second heat supply part, for making the second heat supply part move inside, the heat gathering cavity is arranged at the position of the second heat supply part, the heat source shunt opening is a large heat supply opening, and most of the heat in the heat flow cylinder is gathered in the cover sleeve, so that the second heat flow can be formed through the heat gathering opening for drying the paper.

[0016] Further, the second heat supply part comprises a fitting plate, the fitting plate is arranged in an arc shape, and the fitting plate is matched with the shape of the embedding groove.

[0017] The fitting plate can completely block the heat flow cylinder, when the internal heat pressure is small, the second heat part is close to the heat supply assembly end, the fitting plate is fitted in the embedding groove, the heat source diversion port is blocked, when the paper conveying speed is slow, the booster pump can generate small pressure, and the heat can dry the paper from the position of the first heat part.

[0018] Further, the second heat part further comprises a bending plate, the bottom of the fitting plate is fixedly connected with the bending plate, one side of the bending plate is fixedly connected with a baffle, the baffle is sleeved in the guide port, a gravity matching rod is arranged at the gravity center position of the baffle, and the gravity matching rod is rotationally arranged on the inner wall of the diversion port.

[0019] Further, the second heat part is centered on the gravity matching rod, the weight of the end close to the heat supply assembly is greater than that of the other end, and the end of the baffle is provided with a flow guide surface.

[0020] The technical effects and advantages of the utility model are as follows:

[0021] 1. When the second heat part is in the open state, the airflow in the uniform heat channel enters the entrance of the paper from left to right, and the heat in the uniform heat channel can dry the paper in the second program, because the airflow in the uniform heat channel of the second heat part and the first heat part has convection phenomenon, the heat collision can increase the range of airflow disturbance on the surface of the paper, and the heat is uniform, and the moisture generated by the paper can be conducted to the outside, so that the moisture is collected in the entrance after being blocked by the side baffle.

[0022] 2. The first heat part is arranged between the cylinder body and the peripheral plate member to build a heat flow channel, to uniformly collect heat, so that the heat can be distributed on the surface of the paper as much as possible under the condition of reducing loss, and when the heat flows out, the diversion pipe can divert the heat into the opening, so that the heat is excessive in the opening and is collected, and is uniformly dispersed through the uniform heat channel, the diversion port is a groove with the same shape as the second heat part, to make the second heat part move inside, the outer cover is a heat collection cavity at the second heat part, the heat source diversion port is a large heat supply port, and most of the heat in the heat flow cylinder is collected in the outer cover, so that the heat can form a second heat flow through the heat collection port to dry the paper. BRIEF DESCRIPTION OF DRAWINGS

[0023] Fig. 1 The utility model is a schematic view;

[0024] Fig. 2 It is the sectional view of the utility model;

[0025] Fig. 3 A partial sectional view of the present application.

[0026] In the drawing:

[0027] 1, cover; 2, heat supply assembly; 21, hot flow cylinder; 22, embedding groove; 23, shunt hole; 24, heat source diversion port; 25, central heating; 3, first heat distribution part; 31, cover sleeve; 32, shunt pipe; 33, shunt port; 34, guide port; 35, heat gathering port; 36, open port; 4, second heat distribution part; 41, fitting plate; 42, gravity matching rod; 43, baffle; 5, side baffle; 6, cylinder peripheral plate; 61, uniform heating channel. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0029] Referring to Figs. 1 to 3 A Yankee drying gas cover for papermaking, as shown in the drawing, comprises:

[0030] A cover 1 is wrapped around the periphery of the Yankee dryer, and a space for accommodating paper passing through is reserved between the cover 1 and the Yankee dryer;

[0031] Two heat supply assemblies 2 are mirror-imaged arranged in the cover 1, and the heat supply assemblies 2 are used for generating heat and shunting into the space through the first heat distribution part 3 and the heat supply assemblies 2;

[0032] A cylinder peripheral plate 6 is arranged in the cover 1, and the cylinder peripheral plate 6 forms an entirety with the cover 1, and the cylinder peripheral plate 6 is provided with side baffles 5 on the front and back sides;

[0033] The heat supply assembly 2 comprises a hot flow cylinder 21, the bottom of the hot flow cylinder 21 is fixedly connected with the first heat distribution part 3, the first heat distribution part 3 is provided with a space for the second heat distribution part 4 to move, and the second heat distribution part 4 is movably arranged on the first heat distribution part 3, one side of the second heat distribution part 4 is attached to the heat supply assembly 2, and the other side of the second heat distribution part 4 is used for adjusting the caliber size of the entrance of the uniform heating channel 61 on the cylinder peripheral plate 6.

[0034] The center of the inner cavity of the hot flow cylinder 21 is provided with a center heating 25 which can adjust the air flow intensity, the outside of the center heating 25 is provided with a pressurizing pump, one side of the hot flow cylinder 21 is provided with an arc-shaped embedding groove 22, a plurality of heat source branch guide openings 24 are arranged on the inner wall of the embedding groove 22, and a plurality of branch flow holes 23 are arranged on the inner wall bottom of the hot flow cylinder 21.

[0035] The setting of the heat supply assembly 2 can adjust the rotating speed of the Yankee dryer, the width of the paper, the thickness of the paper, and the material of the paper, and the rotating speed of the external pressurizing pump, so that the air flow rate input into the hot flow cylinder 21 can be adjusted, at this time, the heat output from the first heat distribution part 3 is also adjusted, the heat output from the second heat distribution part 4 is also large, and the heat gathered on the surface of the paper is increased, and the drying efficiency of the paper is further increased;

[0036] It is worth emphasizing that since the paper is conveyed from left to right, when the second heat distribution part 4 is in an open state, the air flow entering the uniform heat channel 61 in the opening 36 just dries the paper at the entrance, at the same time, the heat entering the uniform heat channel 61 from the second heat distribution part 4 can dry the paper in the second program, since the air flow entering the uniform heat channel 61 from the second heat distribution part 4 and the first heat distribution part 3 has a convection phenomenon, so that the heat shock can increase the range of air flow disturbance on the surface of the paper, and the heat is uniform, at the same time, the moisture generated by the paper can be conducted to the outside, so that the moisture is always collected at the entrance after being blocked by the side baffle 5;

[0037] As to why the air flow guides the moisture to the position of the paper entrance, since the opening 36 is an open setting, the power of the air flow is weakened, and a narrow channel is formed between the uniform heat channel 61 and the heat gathering opening 35, which is used to increase the air flow speed, and then the air flow with high initial speed can discharge the moisture.

[0038] The first heat distribution part 3 comprises a cover sleeve 31, a plurality of branch flow pipes 32 are arranged in the cover sleeve 31, the plurality of branch flow pipes 32 are communicated with the uniform heat channel 61 through the opening 36, the cover sleeve 31 is further provided with a branch flow opening 33, the tail end of the branch flow opening 33 is provided with a heat gathering opening 35 communicated with the opening 36, a guide opening 34 is arranged on the inner wall of the branch flow opening 33 and connected with the heat gathering opening 35, and the guide opening 34 is used to limit the rotation amplitude of the second heat distribution part 4.

[0039] The first heat distribution part 3 is arranged to form a heat flow channel with the cylinder peripheral plate 6, so as to uniformly gather heat, so that the heat can be distributed on the surface of the paper as much as possible with reduced loss, and when the heat flows out, the shunt pipe 32 can shunt the heat into the opening 36, so that the heat is excessive in the opening 36 and is gathered, and is uniformly distributed through the uniform heat channel 61, the shunt opening 33 is a groove with the same shape as the second heat distribution part 4, so as to enable the second heat distribution part 4 to move inside, the outer cover 1 is provided with a heat gathering cavity at the position of the second heat distribution part 4, and the heat source shunt opening 24 is a large heat supply opening, so that most of the heat in the heat flow cylinder 21 is gathered in the outer cover 1, so that the heat can form a second heat flow through the heat gathering opening 35 to dry the paper.

[0040] The second heat distribution part 4 comprises a fitting plate 41, which is arranged in an arc shape and matches the shape of the embedded groove 22.

[0041] The fitting plate 41 can completely block the heat flow cylinder 21, and when the internal heat pressure is small, the fitting plate 41 is fitted into the embedded groove 22, so as to block the heat source shunt opening 24, so that when the paper conveying speed is slow, the booster pump can generate a small pressure, and the heat can be used to dry the paper from the position of the first heat distribution part 3.

[0042] The second heat distribution part 4 further comprises a curved plate fixedly connected to the bottom of the fitting plate 41, one side of the curved plate is fixedly connected with a baffle 43, the baffle 43 is sleeved in the guide opening 34, a gravity matching rod 42 is arranged at the gravity center position of the baffle 43, and the gravity matching rod 42 is rotationally arranged on the inner wall of the shunt opening 33.

[0043] The second heat distribution part 4 is centered on the gravity matching rod 42, the weight of the end close to the heating assembly 2 is greater than the weight of the other end, and the end of the baffle 43 is provided with a flow guide surface.

[0044] Finally, it should be noted that the above description is only a preferred embodiment of the present application and is not intended to limit the present application, although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments or make equivalent replacement for some technical features, and any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A papermaking drying Yankee hood characterized by, The utility model relates to a heat supply device for yankee dryer, which comprises: an outer cover (1) wrapped around the periphery of the yankee dryer, and a space is reserved between the outer cover (1) and the yankee dryer for accommodating paper passing through; two heat supply assemblies (2) mirror-imaged arranged in the outer cover (1), which are used to generate heat and flow into the space through the first heat distribution part (3) and the heat supply assembly (2); a cylinder peripheral plate (6) arranged in the outer cover (1) and integrated with the outer cover (1), and side baffles (5) are arranged on the front and back sides of the cylinder peripheral plate (6). The heat supply assembly (2) comprises a hot flow cylinder (21), the bottom of the hot flow cylinder (21) is fixedly connected with the first heat distribution part (3), the first heat distribution part (3) is provided with a space for the movement of the second heat distribution part (4), and the second heat distribution part (4) is movably arranged on the first heat distribution part (3), one side of the second heat distribution part (4) is attached to the heat supply assembly (2), and the other side of the second heat distribution part (4) is used to adjust the caliber size of the inlet of the uniform heat channel (61) on the cylinder peripheral plate (6).

2. A Yankee drying hood for papermaking according to claim 1, characterized in that A center heating (25) capable of adjusting air flow intensity is arranged at the center position of the inner cavity of the hot flow cylinder (21), a pressurizing pump is arranged outside the center heating (25), an arc-shaped embedding groove (22) is arranged on one side of the hot flow cylinder (21), a plurality of heat source distribution openings (24) are formed in the inner wall of the embedding groove (22), and a plurality of flow distribution holes (23) are arranged at the bottom of the inner wall of the hot flow cylinder (21).

3. A Yankee drying hood for papermaking according to claim 2, characterized in that The first heat distribution part (3) comprises a cover sleeve (31), a plurality of flow distribution pipes (32) are arranged in the cover sleeve (31), the plurality of flow distribution pipes (32) are communicated with the uniform heat channel (61) through an opening (36), a flow distribution opening (33) is further arranged on the cover sleeve (31), a heat accumulation opening (35) is arranged at the tail end of the flow distribution opening (33) and communicated with the opening (36), a guide opening (34) is arranged in the inner wall of the flow distribution opening (33) and connected with the heat accumulation opening (35), and the guide opening (34) is used to limit the rotation amplitude of the second heat distribution part (4).

4. A Yankee drying hood for papermaking according to claim 3, characterized in that The second heat distribution part (4) comprises an attachment plate (41), the attachment plate (41) is arranged in an arc shape and matches the shape of the embedding groove (22).

5. A Yankee drying hood for papermaking according to claim 4, characterised in that, The second heat distribution part (4) further comprises a curved plate, the curved plate is fixedly connected with the bottom of the attachment plate (41), one side of the curved plate is fixedly connected with a baffle (43), the baffle (43) is sleeved in the guide opening (34), a gravity matching rod (42) is arranged at the center of gravity position of the baffle (43), and the gravity matching rod (42) is rotatably arranged on the inner wall of the flow distribution opening (33).

6. A Yankee drying hood for papermaking according to claim 5, characterized in that The second heat distribution part (4) is centered on the gravity matching rod (42), the weight of the end close to the heat supply assembly (2) is greater than that of the other end, and the end of the baffle (43) is provided with a flow guide surface.

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