Air bag type backpressure device of light slag extruding machine

Abstract

The utility model discloses an air bag type backpressure device of a light slag extruding machine, which comprises a box body, a backpressure device and a compressed air control unit, the box body is arranged at the position of a discharge port, the backpressure device is arranged in the box body, and the compressed air control unit is arranged on the side wall of the box body. The back pressure device is an air bag type back pressure device. According to the air bag type backpressure device of the light slag extruding machine, the traditional hydraulic backpressure is changed into the air bag type backpressure, a driving and cooling system of a hydraulic station is directly reduced, the phenomena of hydraulic oil leakage and the like are avoided, the site is simpler and cleaner, and the transformed pressure increasing and reducing device at the discharge port has fewer parts and is easy to maintain; and the corresponding failure rate is greatly reduced, and the equipment operation cost is also reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of papermaking equipment, in particular to an air bag type back pressure device for a light residue extruder. Background Art

[0002] In the pulping process of waste paper, due to the strict restrictions on foreign waste quotas, stricter inspection forms and reduced foreign waste quotas, the main raw materials used in the production of low-end paper grades are domestic waste E grade, waste paper, pit paper and other low-end domestic waste. The large-scale use of these low-end waste papers will lead to an increase in the amount of light residue discharged by the drum pulper.

[0003] The existing back pressure device of the discharge port of the light residue extruder of the papermaking enterprise adopts a hydraulic structure. The hydraulic control system has many sensors and hydraulic components. These devices are in a humid and corrosive environment for a long time, and the equipment is prone to many failures. Since the operation of the hydraulic cylinder requires the drive of the hydraulic station, and the equipped hydraulic station also requires a motor to drive, the operating energy consumption of the equipment will also increase accordingly, and the hydraulic system needs to be cooled, and the cooling system also brings energy loss. The existing discharge port back pressure device of the equipment is divided into three parts: the execution part (cylinder), the drive part (hydraulic station), and the electronic control part (automatic control cabinet). The failure rate of the parts of this device will also increase accordingly, thereby affecting production operation and increasing maintenance costs. The equipment is operated to dehydrate the material in the state of forming a plug. The discharge port does not require too much pressure during the operation of the equipment. The use of hydraulic pressurization will result in excessive pressure and waste of equipment energy consumption. Summary of the invention

[0004] The utility model aims to provide a light slag extruder airbag back pressure device to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a light slag extruder airbag back pressure device, comprising a box body, a back pressure device and a compressed air control unit, the box body is a box body at the discharge port position, the back pressure device is an airbag back pressure device, the back pressure device is arranged in the box body, and the compressed air control unit is arranged on the side wall of the box body.

[0006] Preferably, a back pressure device shaft is installed at one end of the back pressure device to change the position of the back pressure device.

[0007] Preferably, a bearing is provided on the other side wall of the box body, opposite hanging rings are provided on both sides of the top edge, and an air bag is provided at the center of the top.

[0008] Preferably, the airbag is fixed oppositely on both sides of an arc-shaped base and an arc-shaped plate. A through hole is provided in the center of the bottom of the arc-shaped base for the air inlet of the airbag to pass through. A push rod is fixedly connected to the arc-shaped plate, and the push rod passes through the fixed plate. The fixed plate is used to control the maximum displacement of the arc-shaped plate. The other end of the push rod is connected to a piston body, and the piston body moves in the piston mouth. After the airbag is inflated, the piston body extends out of the piston mouth to generate pressure on the back pressure device, which changes the position of the back pressure device and generates pressure.

[0009] Preferably, the compressed air control unit includes an air source switch, a filter regulator, an air source interface, a coil, a solenoid valve, a proportional pressure regulator, a compressed air outlet and a control line interface.

[0010] Preferably, the compressed air outlet is connected to the airbag to control the pressure change in the airbag.

[0011] Compared with the prior art, the beneficial effects of the utility model are as follows: the light slag extruder airbag back pressure device described in the utility model directly reduces the driving and cooling systems of the hydraulic station by setting the airbag back pressure device, and there will be no hydraulic oil leakage and the like. The site is more concise and clean, and the modified discharge port pressure increasing and reducing device has fewer parts and is easy to maintain, the corresponding failure rate is greatly reduced, and the equipment operating cost will also be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is the structural diagram of the discharge port of the utility model;

[0013] Figure 2 This is the structural diagram of the compressed air control unit of the utility model;

[0014] Figure 3 This is a structural diagram of the back pressure device of the utility model;

[0015] Figure 4 This is a diagram of the fixing and working structure of the airbag of the utility model;

[0016] Figure 5 This is a structural diagram of the arc-shaped base of the utility model.

[0017] In the figure: 1. back pressure device; 101. back pressure device shaft; 2. housing; 3. bearing; 4. lifting ring; 5. air bag; 501. arc base; 502. arc plate; 503. fixing plate; 504. push rod; 505. piston body; 506. piston mouth; 6. compressed air control unit; 601. air source switch; 602. filter regulator; 603. air source interface; 604. coil; 605. solenoid valve; 606. proportional pressure regulator; 607. compressed air outlet; 608. control line interface. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0019] See also Figure 1-5 The utility model provides a technical solution: a light slag extruder airbag back pressure device, comprising a back pressure device 1, a box body 2 and a compressed air control unit 6, wherein the back pressure device 1 is arranged in the box body 2, and a compressed air control unit 6 is installed on one side wall of the box body 2.

[0020] As an implementation mode of the present utility model, a back pressure device shaft 101 is provided at the end of the back pressure device 1 .

[0021] As an implementation mode of the utility model, an air bag 5 is provided at the top center of the box body 2 , opposite hanging rings 4 are provided at the top edge, and a bearing 3 is installed on the other side wall of the box body 2 .

[0022] As an embodiment of the utility model, an arc-shaped base 501 is provided at one end of the airbag 5, and a through hole is opened at the bottom center of the arc-shaped base 501, and the air inlet hole of the airbag 5 passes through the through hole; an arc-shaped plate 502 is provided at the other end of the airbag 5, and a push rod 504 is connected to the arc-shaped plate 502, and the push rod 504 passes through the fixed plate 503, and the other end of the push rod 504 is fixedly connected to a piston body 505, and the piston body 505 is located inside the piston mouth 506.

[0023] As an implementation mode of the present utility model, the piston body 505 moves outward when the airbag 5 expands to squeeze the back pressure device 1, and the back pressure device 1 moves downward to squeeze and dehydrate the material.

[0024] As an implementation mode of the utility model, when the airbag 5 contracts, the back pressure device shaft 101 moves upward driven by the bearing 3 , pushing the piston body 505 to move and contract into the piston port 506 .

[0025] As an embodiment of the utility model, the compressed air control unit 6 includes an air source switch 601, a filter regulator 602, an air source interface 603, a coil 604, a solenoid valve 605, a proportional pressure regulator 606, a compressed air outlet 607 and a control line interface 608. The compressed air outlet 607 is connected to the air inlet of the airbag 5. The contraction and expansion of the airbag 5 is controlled by the compressed air control unit 6, and the pressure generated is controlled to push the piston body 505 to move.

[0026] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A light slag extruder airbag back pressure device, comprising a back pressure device (1), a box (2) and a compressed air control unit (6), wherein the top edge of the box (2) is provided with opposing lifting rings (4), the other side wall of the box (2) is provided with a bearing (3), the back pressure device (1) is arranged in the box (2), and the compressed air control unit (6) is provided on one side wall of the box (2), characterized in that: An airbag (5) is provided at the center of the top of the box body (2); an arc-shaped base (501) is provided at one end of the airbag (5); a through hole is opened at the center of the bottom of the arc-shaped base (501); an air inlet of the airbag (5) passes through the through hole; an arc-shaped plate (502) is provided at the other end of the airbag (5); a push rod (504) is connected to the arc-shaped plate (502); the push rod (504) passes through the fixed plate (503); the other end of the push rod (504) is fixedly connected to a piston body (505); the piston body (505) is located inside the piston port (506).

2. The airbag back pressure device for a light slag extruder according to claim 1, characterized in that: A back pressure device shaft (101) is provided at the end of the back pressure device (1).

3. The airbag back pressure device for a light slag extruder according to claim 1, characterized in that: The piston body (505) moves outward when the airbag (5) expands, squeezing the back pressure device (1), and the back pressure device (1) moves downward to generate squeezing force.

4. The airbag back pressure device for a light slag extruder according to claim 3, characterized in that: When the airbag (5) contracts, the back pressure device shaft (101) moves upward under the drive of the bearing (3), pushing the piston body (505) to move and contract into the piston opening (506).

5. The airbag back pressure device for a light slag extruder according to claim 1, characterized in that: The compressed air control unit (6) comprises an air source switch (601), a filter regulator (602), an air source interface (603), a coil (604), a solenoid valve (605), a proportional pressure regulator (606), a compressed air outlet (607) and a control line interface (608); the compressed air outlet (607) is connected to an air inlet of the airbag (5); the contraction and expansion of the airbag (5) is controlled by the compressed air control unit (6), and the pressure generated by the control drives the piston body (505) to move.

Images