PPH overload drum for leather dyeing processing

Abstract

The invention relates to a PPH overload drum for leather dyeing processing, which comprises a cylindrical drum cylinder, two ends of the drum cylinder are respectively provided with a drum cover, and the outer wall of each drum cover is respectively provided with a mounting bracket connected with a shaft; a conical screen is arranged at one end of the inner cavity of the drum cylinder, and the contraction end and the flaring end of the conical screen are fixedly connected with the inner wall of the drum cover and the inner wall of the drum cylinder respectively; four baffles are evenly distributed on the inner wall of the drum cylinder, the two ends of each baffle are fixedly connected with the drum covers at the two ends respectively, the corners of the ends, close to the conical screen, of the baffles are obliquely arranged and fixedly connected with the surface of the conical screen, the baffles are obliquely arranged and eccentric to the axis of the drum cylinder, and the inclination directions of the baffles are consistent with the rotating direction of the drum cylinder. The baffle plates are arranged on the upper side and the lower side, the two adjacent baffle plates are perpendicular to each other, during rotation, the baffle plates can lift skins to the top end and hit the lower baffle plates, high-falling beating is utilized to form a strong mechanical effect, and the absorption speed and the absorption effect of chemical materials are improved; the drum is made of PPH, dye can be prevented from being adsorbed by the drum body, the dye is saved, the anti-corrosion effect is achieved, and the service life of the drum is prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of leather processing equipment, and particularly relates to a PPH overload drum suitable for leather dye processing. Background Art

[0002] In the production and processing of leather, dyeing is a common process, and drum dyeing is the most widely used method. The specific operation of drum dyeing is to put the leather into a drum and add dyes into the drum. Through the rotational movement of the drum, the leather and the dyes are fully stirred and mixed, so that the dyes can uniformly penetrate into the interior of the leather, and finally the dyeing process is completed. At the same time, through the rotation of the drum, the leather continuously tumbles, squeezes, and rubs inside, promoting the gradual relaxation of the fibers and achieving the effect of softening the leather. The softening treatment can not only improve the softness of the leather, but also enhance its hand feeling and texture, and is an indispensable link in leather processing. Traditional drums are generally made of wood, and wood is prone to moisture absorption, corrosion, and cracking. After long-term use, wear will occur, resulting in a short service life; at the same time, wood materials are prone to adsorb dyes and chemical agents, which not only increases the processing cost, but also is difficult to clean thoroughly, and is prone to breeding bacteria or molds, affecting the quality of the leather, and also requires regular maintenance and repair.

[0003] During the softening process of the drum, baffles are needed to lift the leather from the liquid and then drop the leather when it is close to the highest point, falling onto the liquid or leather at a lower position in the drum, so as to generate a certain mechanical effect. The distribution structure of the traditional drum baffles is as Figure 1 shown. The baffles are evenly distributed on the inner wall of the drum cylinder. This baffle distribution structure results in a low loading capacity of the drum. Otherwise, it is impossible to effectively beat the leather, ultimately affecting the absorption speed and absorption effect of the chemicals, and thus increasing the dye cost. Summary of the Invention

[0004] In view of the above problems, the present invention discloses a PPH overload drum for leather dyeing processing. The drum is made of PPH material, which can reduce the consumption of chemicals, reduce corrosion, and improve the service life; and the eccentrically arranged baffles can lift the leather to a high place and then use the high drop to beat it, improving the acting strength.

[0005] The specific technical solutions are as follows:

[0006] A PPH overload drum for leather dyeing and processing, comprising a cylindrical drum cylinder, with drum covers respectively provided at both ends of the drum cylinder, and mounting brackets for connecting to the shaft are respectively provided on the outer walls of the drum covers; one end of the inner cavity of the drum cylinder is provided with a conical screen, and the contraction end and the flared end of the conical screen are respectively fixedly connected to the inner wall of the drum cover and the inner wall of the drum cylinder; four baffles are evenly distributed on the inner wall of the drum cylinder, both ends of the baffles are fixedly connected to the drum covers at both ends, and the corners of the baffles near the conical screen are inclined and fixedly connected to the surface of the conical screen. The baffles are all inclined and eccentric to the axis of the drum cylinder, and the inclination directions of the baffles are all the same as the rotation direction of the drum cylinder, and adjacent two baffles are perpendicular to each other.

[0007] Further, the drum cylinder, the drum covers and the baffles are all made of PPH material.

[0008] Further, the inclination angle between the baffle and the diameter of the drum cylinder is 30°.

[0009] Further, the baffle includes side plates and a honeycomb grille layer, and the honeycomb grille layer is arranged between the two side plates; a groove is opened along the length direction on the end surface of the baffle away from the inner wall of the drum cylinder, and a PPH reinforcing rib plate is embedded in the groove, and the end surface of the PPH reinforcing rib plate is flush with the end surface of the baffle.

[0010] Further, heat exchanger components are symmetrically provided on the inner walls on both sides of the drum cylinder. One end of each of the two heat exchanger components extends to one of the drum covers and is connected to a steam channel on the inner wall of the drum cover, and a steam chamber is provided at the center of the inner wall of the drum cover. The steam chamber is communicated with a steam shaft passing through the center of the drum cover, and both sides of the steam chamber are respectively communicated with the two heat exchanger components through two steam channels.

[0011] Further, a drum opening is provided on the side wall of the drum cylinder, and the drum opening is closed by a drum door.

[0012] Further, a valve interface is provided at one end of the side wall of the drum cylinder close to the conical screen.

[0013] The beneficial effects of the present invention are reflected in:

[0014] (1) In the present invention, the drum is made of PPH, which can avoid the adsorption of dyes by the drum body, save dyes, and at the same time play an anti-corrosion effect and improve the service life of the drum.

[0015] (2) In the present invention, the baffle is inclined, forming a V-shaped groove between it and the drum wall. During rotation, the baffle can lift the leather and the bath solution together to the top of the rotating drum. Subsequently, the leather slides down and hits the lower baffle, thereby forming a strong mechanical action through high-drop beating, improving the absorption speed and effect of the chemicals; and there will be no pulling when turning the leather, avoiding tearing and loosening of the surface, and not damaging the leather, ensuring the quality of leather processing.

[0016] (3) Compared with traditional rotating drums, the overload rotating drum can use a smaller liquor ratio. A small amount of chemicals can achieve the same concentration, achieving the effect of saving chemicals; at the same time, the overload rotating drum has a larger loading capacity, improving the efficiency of leather processing; and the mechanical action of the overload rotating drum comes from high-drop beating, so a low-power motor can be used to drive it for low-speed rotation, thereby achieving the effect of reducing energy consumption. Description of the Drawings

[0017] Figure 1 It is a schematic structural diagram of a traditional rotating drum.

[0018] Figure 2 It is a front structural schematic diagram of the overload rotating drum of the present invention.

[0019] Figure 3 It is a back structural schematic diagram of the overload rotating drum of the present invention.

[0020] Figure 4 It is a front cross-sectional view of the overload rotating drum of the present invention.

[0021] Figure 5 It is a back cross-sectional view of the overload rotating drum of the present invention.

[0022] Figure 6 It is a side cross-sectional view of the overload rotating drum of the present invention.

[0023] Figure 7 It is a partial cross-sectional view of the overload rotating drum of the present invention.

[0024] Figure 8 It is a front view of the baffle of the present invention.

[0025] Figure 9 It is a schematic end-face structure diagram of the baffle of the present invention.

[0026] Figure 10 It is a cross-sectional view of the baffle of the present invention.

[0027] Figure 11 It is Figure 10 the cross-sectional view taken along the A-A direction in

[0028] Description of reference numerals: drum cylinder 1, drum opening 101, valve interface 102, heat exchanger assembly 103, steam passage 104, steam chamber 105, drum cover 2, mounting bracket 3, conical screen 4, baffle 5, side plate 51, honeycomb grille layer 52, PPH reinforcing rib plate 53. Detailed implementation manners

[0029] To make the technical solutions of the present invention clearer and more definite, the present invention will be further described below with reference to the accompanying drawings. Any solution obtained by equivalent substitution of the technical features of the technical solutions of the present invention and conventional reasoning falls within the protection scope of the present invention. The fixed connection and fixed setting mentioned in the present invention are all common connection methods in the mechanical field, and welding, bolt and nut connection, and screw connection can all be used.

[0030] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0031] Please refer to the attached Figure 2-11 , this embodiment provides a PPH overload drum for leather dyeing and processing. The overload drum housing is made of corrosion-resistant and wear-resistant PPH material. The overload drum includes a cylindrical drum cylinder 1. Drum covers 2 are respectively provided at both ends of the drum cylinder 1. Mounting brackets 3 for connecting to the shaft are respectively provided on the outer walls of the drum covers 2, and one of the shafts is driven by a motor to drive the overload drum to rotate. A conical screen 4 is provided at one end of the inner cavity of the drum cylinder 1. The contraction end and the flared end of the conical screen 4 are respectively fixedly connected to the inner wall of the drum cover 2 and the inner wall of the drum cylinder 1. Four baffles 5 are evenly distributed on the inner wall of the drum cylinder 1. Both ends of the baffle 5 are fixedly connected to the drum covers 2 at both ends. The corners of the baffle 5 near the conical screen 4 are inclined and are fixedly connected to the surface of the conical screen 4. The baffles 5 are all inclined and eccentric to the axis of the drum cylinder 1. The inclination angle between the baffle 5 and the diameter of the drum cylinder 1 is 30°. And the inclination directions of the baffles 5 are all the same as the rotation direction of the drum cylinder 1, and adjacent two baffles 5 are perpendicular to each other, and opposite two baffles 5 are parallel to each other.

[0032] In this embodiment, the baffle 5 includes side plates 51 and a honeycomb grille layer 52, and the honeycomb grille layer 52 is arranged between the two side plates 51; a groove is formed in the end surface of the baffle 5 away from the inner wall of the drum cylinder 1 along its length direction, and a PPH reinforcing rib plate 53 is embedded in the groove. The end surface of the PPH reinforcing rib plate 53 is flush with the end surface of the baffle 5. When the leather slides, it contacts the PPH reinforcing rib plate 53, which can avoid problems such as pulling and abrasion of the leather.

[0033] In this embodiment, heat exchanger assemblies 103 are symmetrically arranged on the inner walls of both sides of the drum cylinder 1. One end of each of the two heat exchanger assemblies 103 extends to one of the drum covers 2 and is connected to a steam channel 104 on the inner wall of the drum cover 2. And a steam chamber 105 with a hollow cylindrical structure is arranged at the center of the inner wall of the drum cover 2. The steam chamber 105 is communicated with a steam delivery shaft passing through the center of the drum cover 2, and both sides of the steam chamber 105 are respectively communicated with the two heat exchanger assemblies 103 through the two steam channels 104.

[0034] In this embodiment, a drum opening 101 for taking and placing leather is formed on the side wall of the drum cylinder 1, and the drum opening 101 is closed by a drum door.

[0035] In this embodiment, a valve interface 102 is arranged on the side wall of the drum cylinder 1, and the valve interface 102 is located at one end close to the conical screen 4 to prevent the leather from blocking the valve.

[0036] The present invention uses four mutually perpendicular baffles 5 to flip the leather. Since the baffle 5 is deviated from the axis by 30 degrees and forms a V-shaped groove with the inner wall of the drum cylinder 1, this V-shaped groove can lift the leather and the bath solution to a high place when the overloaded drum rotates, and then slowly slide down and hit the opposite baffle 5 below. Therefore, the mechanical action of the overloaded drum is realized by high-drop beating, rather than the centrifugal force when rotating at high speed. The action intensity is greater than that of the traditional drum, making the absorption speed and absorption effect of the chemical materials better. When the baffle 5 flips the leather, it will not cause pulling, winding, tearing or loose surface phenomenon to the leather, and there are fewer such phenomena.

[0037] The absorption of chemical materials is jointly completed by the mechanical action of penetration and beating. Therefore, the overloaded drum can use a smaller liquor ratio and less chemical materials to achieve the same concentration, achieving savings in the consumption of chemical materials and water, thereby reducing costs.

[0038] The mechanical action of the overloaded drum comes from high-drop beating. When the drum is overloaded, the force on the drum is more balanced. Therefore, a low-power motor can be used for driving and the drum can rotate at a low speed, with the characteristics of a large loading capacity, a low rotation speed and low energy consumption.

[0039] As described above, it is only the preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present invention should be covered by the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

1. A PPH overload drum for leather dyeing, comprising a cylindrical drum cylinder (1), drum covers (2) are respectively provided at both ends of the drum cylinder (1), and mounting brackets (3) for connecting to a shaft are respectively provided on the outer walls of the drum covers (2); characterized in that: A conical screen (4) is provided at one end of the inner cavity of the drum cylinder (1), and the contraction end and the expansion end of the conical screen (4) are fixedly connected to the inner wall of the drum cover (2) and the inner wall of the drum cylinder (1) respectively; four baffles (5) are evenly distributed on the inner wall of the drum cylinder (1), and the two ends of the baffles (5) are fixedly connected to the drum covers (2) at both ends respectively, and each baffle (5) is inclined near the corner of one end of the conical screen (4) and is fixedly connected to the surface of the conical screen (4), and the baffles (5) are all inclined and eccentric to the axis of the drum cylinder (1), and the inclination direction of the baffles (5) is consistent with the rotation direction of the drum cylinder (1), and two adjacent baffles (5) are perpendicular to each other.

2. A PPH overload drum for leather dyeing as claimed in claim 1, characterized in that: The drum cylinder (1), the drum cover (2) and the baffle (5) are all made of PPH material.

3. A PPH overload drum for leather dyeing as claimed in claim 1, characterized in that: The inclination angle between the baffle (5) and the diameter of the drum cylinder (1) is 30°.

4. A PPH overload drum for leather dyeing as claimed in claim 3, characterized in that: The baffle (5) comprises a side plate (51) and a honeycomb grid layer (52), wherein the honeycomb grid layer (52) is arranged between the two side plates (51); a groove is provided on the end surface of the baffle (5) away from the inner wall of the drum cylinder (1) along its length direction, and a PPH reinforcing rib plate (53) is embedded in the groove, and the end surface of the PPH reinforcing rib plate (53) is flush with the end surface of the baffle (5).

5. A PPH overload drum for leather dyeing as claimed in claim 1, characterized in that: Heat exchanger assemblies (103) are symmetrically arranged on the inner walls of both sides of the drum cylinder (1), one end of each of the two heat exchanger assemblies (103) extends to one of the drum covers (2) and is connected to a steam channel (104) on the inner wall of the drum cover (2), and a steam chamber (105) is arranged at the center of the inner wall of the drum cover (2), the steam chamber (105) is connected to a steam shaft passing through the center of the drum cover (2), and both sides of the steam chamber (105) are connected to the two heat exchanger assemblies (103) through two steam channels (104) respectively.

6. A PPH overload drum for leather dyeing as claimed in claim 1, characterized in that: A drum opening (101) is provided on the side wall of the drum cylinder (1), and the drum opening (101) is closed by a drum door.

7. A PPH overload drum for leather dyeing as claimed in claim 1, characterized in that: A valve interface (102) is provided on one end of the side wall of the drum cylinder (1) close to the conical screen (4).

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