SU800270A1 - Gate-actuating mechanism - Google Patents

Description

one

The invention is intended for installation on scrapers of paper, cardboard and drying machines and can be used in the pulp and paper industry.

The scraper of modern paper and board making machines to reduce the wear of the opposite shafts of the shafts in contact with them is provided with devices for their reciprocating movement along the generator shaft.

Devices for reciprocating movement of the scraper with pneumatic actuators in the form of diaphragm chambers or pneumatic cylinders are known.

As an actuator for reciprocating the scraper, one-sided diaphragm Pyevmatic chambers mounted on both sides of the scraper are used here.

The disadvantage of these devices is that, due to the compressibility of air, they do not ensure smooth movement of the scraper along the projectile, the movement occurs with jerks, with stops, which leads to uneven wear of the scraper blade and

the surface of the shaft on which it is installed.

Hydraulic devices for reciprocating scrapers are also known, which eliminate the aforementioned drawback of the uneven movement of the scrapers 2J.

. However, the cumbersome design, expressing the presence of the oil pump

Installation, switching and control equipment limits the use of such devices.

The most promising are pneumatic-hydraulic devices for reciprocating the scraper, where the power agent, ensuring the movement of the scraper, is compressed air, and the hydraulic part is damping, ensuring smooth movement. However, a hydropower station is not required.

Thus, pneumohydraulic devices of oscillatory motion of scraper have the advantages

5 pneumatic and hydraulic devices and are devoid of their shortcomings. A device is known that includes the color of the cylinder, in which the rod is over. The posts are interconnected through

Claims (4)

0 The throttle and oil filled 37 The disadvantage of this device is low reliability due to unavoidable oil leaks from the rod cavities through the seals of the hydraulic rod and piston of the hydraulic cylinder, which, when there is no oil make-up, quickly brings the device out of operation and requires new oil filling. The closest analogue of the invention is a device for moving a template - r5a, containing two actuators with a method, one of which consists of a housing inside which one is attached to it. . the end is a bellows connected to the siaphone of another device through the cores 4. A disadvantage of the device is the presence of a membrane having a low reliability and a short service life. In addition, due to the rigid connection of the scraper trunnion with the membrane and the bellows, the membrane and the bellows twist when the scraper is rotated (as a result of its blade being worn or the scraper retracted to the inoperative position. The purpose of the invention is to improve the reliability of the device. This goal is achieved by the bellows of at least one device has a glass attached to its movable end and provided with a fixing ring, in which the scraper axle is freely mounted, while the device can have of the bellows from the turn, consisting of the eyelet, behind the reptile on the glass, and the pin closed by one end on the body and located by the other end in the ear. Fig. 1 shows the device, general view; Fig. 2 - drive unit The device includes drive lines 1 and 2, with a sealed casing 3 and 4, in which the bellows 5 and b are installed. In this case, two cavities are formed in each case, one of which (7 and 8) is limited by the internal volume of the bellows, and others (.9 and 10) are the walls of the body and the outer surfaces of the bellows. One end (11 and 12) of the bellows 5 and 6 are fixedly mounted in the housing. The bellows cavities are connected to each other via a throttle 13. The skylfon is equipped with a cup 14, rigidly connected with it, in which the pin 15 of the beam is installed with the possibility of rotation. An axial fixing of the trunnion 15 is provided with a lid. A pin 18 is inserted into the eye of the glass 14, the second end of which is fixed in the housing 3. The devices 1 and 2 are attached to the control unit 19. The device works in the following way. . When air is fed into the cavity 9 of the device 1, the bellows 5 is compressed and, moving, carries the trunnions 15 with the scraper 16. At the same time, the volume of the bellows 5 decreases, and the oil from it flows through the throttle 13 into the bellows 6 of the device 2. The volume of the bellows b increases while the air from the cavity 10 is removed through the control unit 19. When air is supplied to the cavity 10 of the device 2, the volume of the bellows 6 decreases, oil flows into the bellows 5, it increases in volume and moves the pin 15 with the scraper in the opposite direction least wear out blade Scraper or during retraction of the latter in an inoperative position proiskhoidt rotation pins 15 in the glass 14. In this case, the friction torque is sensed by a pin 18, which prevents twisting of the bellows 5.. Another embodiment of the device is possible (shown in dotted line in Fig. 1. In this version, one more scraper is connected to the bellows b via a pin and a glass. This design works along the same cycle as described above, but at the same time provides simultaneous operation control Two scrapers. Claim 1. A device for moving a scraper, containing two drive devices, each of which consists of a housing, inside which there is a bellows attached to it at one end, connected to the bellows of the other Installation through a choke, characterized in that, in order to increase the reliability of the device, the bellows of at least one of the devices has a glass attached to its movable end and provided with a fixing ring, in which the scraper axle is freely mounted. it differs in that it has a device for fixing the bellows against rotation, consisting of an eyelet fixed on the glass, and a pin fixed by one end to the body and located by the other end in the eyelet. Sources of information taken into account in the examination 1. Drawing 1M92290, Finnish company V rtsil, 1970. 2.Patent of Poland No. 48160, cl. 55 e, 1/01, 1964. 3. Drawing 35.05-2 of the German company Eck gaubold, 1974. 4. USSR author's certificate No. 512259, cl. About 21 F 3/00, 1975 (prototype).