SU1138089A1 - Arrangement for horizontal opening of trawl mouth - Google Patents

Abstract

DEVICE FOR THE HORIZONTAL DISCOVERY OF THE TYPE OF THRAL, containing a spacer plate mounted on the frame with a possibility of rotation, and a hydraulic control system consisting of a hydraulic cylinder with a rod connected to the plate, a distributor and a converter, different in that in order to increase efficiency in operation by repeatedly changing the angle of attack of the spacer plate, the frame is made hollow and airtight, while the hydraulic cylinder cavities are connected through the distributor one with the environment, and the other with the frame cavity s. (L from 00 to 00 with

Description

The invention relates to industrial fisheries, namely to expansion trawl boards with varying angle of attack. A device for horizontal opening of a trawl is known, comprising a spacer plate mounted in a frame for movement, a keel connected to the frame and a device for fastening the warp and cable, while the plate is seated on the frame using a vertical stand located in its front part 1. However, the design of this device provides in the process of trawling it one position of the spacer plate relative to the flow. The closest to the invention to the technical essence and the achieved result is a device for horizontal opening of the trawl, comprising a spacer plate mounted in a frame with a possibility of movement, and a hydraulic control system consisting of a hydraulic cylinder with brushes connected to the plate, a distributor and a converter controlled from vessel 2. However, the design of the known device does not provide for multiple changes in the angle of attack of the spacer plate, which is required to reduce the resistance ivleni during towing of the trawl and an increase brace forces during trawling. The purpose of the Invention is to increase the efficiency in operation by repeatedly changing the angle of attack of the spacer plate. The goal is achieved by the fact that in the device for horizontal opening of the trawl, comprising a spacer plate mounted on the frame with a possibility of rotation, and a hydraulic control system consisting of a hydraulic cylinder with a rod connected to the plate, a distributor and a converter, the frame is hollow and sealed, with the cylinder cavity through the distributor connected one with the environment, and the other with the cavity of the frame. FIG. Figure 1 shows schematically a device for horizontal opening of a trawl, general side view; in fig. 2 - the same, with a minimum angle of attack, the plan; in fig. 3 - the same, at the maximum angle of attack, the plan; in fig. 4 is a schematic diagram of the device. The device for horizontal opening of the trawl comprises a spacer plate 1 fixed on the frame 2 with the possibility of movement, a hydraulic control system consisting of a hydraulic cylinder 3 with a brush 4 connected to the plate 1, a distributor 5 and a converter consisting of an actuator 6, power supply unit 7 and hydroacoustic receiving head 8. Frame 2 is made hollow, airtight and has a drain plug 9. The cavities A and B of the hydraulic cylinder 3 through one distributor 5 are connected with the environment, and the other with the frame cavity 2. The device operates as follows. Before outputting the trawl complex, the expansion plate 1 is set at the position corresponding to the minimum angle of attack (Fig. 2) and is held in this position by the hydraulic cylinder 3. When the trawl complex is deeper and the angle of attack from the vessel is increased, the acoustic signal is received from the head 8 block 7 power. After the power supply unit 7 is connected, the actuator 6 is actuated, which moves the distributor brush 5. The cavity A of the hydraulic cylinder 3 in this case communicates with the environment, and the cavity B - with the cavity of the frame 2. Due to the pressure difference, the piston of the hydraulic cylinder 3 moves and the spacer plate rotates 1 in the direction of increasing the angle of attack. If necessary, reduce the angle of attack from the ship, a signal is given and valve 5 communicates cavity A with frame cavity 2, and cavity B with the environment. The removal of fluid from the cavity of frame 2 is carried out through the drain hole, removing the plug 9. The proposed device provides for changing the angle of attack many times during the trawling process, which is an increase in operating efficiency. The expected annual economic effect on one vessel of the RTM-S type will be 92.0 thousand rubles.

/

659

4 j

FIG. 2

876592

Fig.Z

0

Claims (1)

DEVICE FOR HORIZONTAL DISPLACEMENT OF THE TRALA MOUTH, containing a spacer plate mounted on the frame with the possibility of rotation, and a hydraulic control system consisting of a hydraulic cylinder with a rod connected to the plate, a distributor and a converter, characterized in that, in order to increase work efficiency by repeatedly changes in the angle of attack of the spacer plate, the frame is hollow and sealed, while the cavity of the hydraulic cylinder through the distributor is connected to one with the environment and the other to the cavity of the frame. FIG. 7