SU745676A1 - Apparatus for measuring-out timber lengths - Google Patents

Description

(54) DEVICE FOR MEASUREMENT OF LENGTH OF ASSORTMENTS

I

The invention relates to the timber and woodworking industry and can be used in installations for cutting logs into longitudinal feeds.

A device is known for measuring the lengths of assortments when chamfering, including a base, retractable stops, a lever mechanism connected to the hydraulic damper 1.

It is also known a device for measuring the lengths of sortimaeites, including a frame, a new porous and drainage lines, sliding stops in a longitudinal vertical plane connected via a lever system to a hydraulic damper, to which a controlled safety valve is connected, having a spring-loaded plunger 2.5

The disadvantages of these devices are the lack of accuracy of measurement for assortments and the complexity of the design.

The purpose of the invention is to improve the accuracy of measurement and simplify the construction. 2

This is achieved by the fact that the controlled safety valve is equipped with a movable piston, which is connected through a spring to the plunger and by means of which the controlled safety valve is divided into the cavity of the cavity, one of which is connected to the pressure line, and a hydraulic damper, and the working area of the overhang is larger than the area of the through-hole of the controlled safety valve.

The drawing shows a hydrokinematic scheme of the proposed device. The device includes a frame 1, sliding and pivoting in the longitudinal and vertical planes of the stops 2, interacting through the rod 3 and the lever system 4 with the hydraulic damper 5.

The device is also equipped with a direct action controlled safety valve 6 having a piston 7 for pre-setting the valve by means of an adjusting screw 8 and a movable piston 9 for locking the valve with pressure by acting on the movable piston 9 through a spring on the plunger 10.

Claims (2)

In the hydraulic system, there is a check valve 11 installed parallel to the controllable safety valve 6. Plunger 10 closes the orifice. controlled safety valve 6. The movable piston 9 divides the valve 6 into two cavities, one of which (cavity A) is connected to the pressure line 12, and the other to the drain line 13 and through the bore and cavity B with the hydraulic damper. The operation of the device is as follows. . When the whip is in contact with one of the sliding pivot stops 2, the force 4 is transmitted through the rod 3 and the lever system to the hydraulic damper rod 5. ..-- 1.- .., -... „.,.„ .. „„ „- The oil from the working cavity of the hydraulic damper 5. is displaced through a controlled gear (safety valve 6 into the tank (not shown in fig.). In this case, the controlled safety valve 6 performs the role of throttles with automatic regulation of the bore hole. Kinetics of the air gap hlitsta gassits. After that, the oil enters the cavities A and B of the controlled guard valve 6, moves the movable piston 9, which presses the plunger 10 through the spring, to the bore hole and, due to the difference in the working areas of the movable piston 9 and plunger 10, blocks the valve bore 6. In this case, the controlled safety valve 6 acts as a block valve. Oil under the full pressure of the hydraulic system enters the working cavity of the hydraulic damper 5 and through the lever system 4, the rod 3 with the protrusions and the stop 2 returns the initial position to your original position. The device provides the specified accuracy of measuring the lengths of the assortments at the expense of isMe:; a; s: da; iii, “aMsW“ “t-Shch,. In the event of a bounce of bales from stops when damping and returning the whip to the measuring point, this significantly improves the quality of products when cutting bricks into assortments and, as a result, reveals the possibility of saving commercial wood by reducing the waste of products. The invention The device for measuring the lengths of assortments, including a frame, pressure and discharge lines, sliding stops in the longitudinal and vertical plane, connected through a lever system with a hydraulic damper, to which a controlled safety valve is connected, having a spring-loaded plunger, characterized in that In order to improve accuracy and design, the controllable safety valve is equipped with a movable piston, which is connected through a spring to the plunger and by means of which The safety valve is divided into two cavities, one of which is connected to the pressure pipe, and the other is connected to the drain and through the through hole with a hydraulic damper, and the working area of the piston is larger than the area of the through hole of the controlled safety valve. Sources of information taken into account in the examination 1. The author's certificate of the USSR 391918, cl. In 27 In 27/10, 1970. 2. Authors certificate of USSR 363582, cl. B 27 B 5/28, 1971 / prototype),;