SU867815A1 - Direction switch for pneumatic transport of loose materials - Google Patents

Description

(54) SWITCH DIRECTION PNEUMATIC TRANSPORTATION OF BULK MATERIALS

I

The invention relates to a pneumatransport of bulk materials and can be used, for example, in the construction industry to change the direction of transport of cement.

A pneumatic conveying direction switch for bulk materials is known, comprising a conical case with an inlet pipe and outlet pipes mounted in its lid, fixed on the inner surface of the lid coaxially with the last cone-shaped branch pipes, switching element mounted on the vertical shaft rotatably from the actuator and provided with a pipe with a conical outer surface that interacts with these conical holes, and the mechanism is fixed tions of the switching element in a predetermined position. The switching element of this switch contains a disk and a bent nozzle I attached to it.

The drawbacks of the known switch are the presence of a drive for ensuring that the switching element is pressed against the outlet piping and the bent pipe is quickly worn during transportation of abrasive materials, which generally reduces the reliability of the switch and makes it more complicated.

The purpose of the invention is to improve reliability and simplify the design of the switch.

This goal is achieved by the fact that the shaft has vertical guiding grooves and the switching element is designed as a hollow truncated cone and mounted on the shaft with the possibility of reciprocating 10 translational movement along these grooves, while the switching element is provided with an annular sealing gasket installed on the periphery of its outer surface. , and an elastic membrane, 15 attached to its inner surface and the lower end of the shaft, and in the case an annular stop interacting with the rings is mounted second gasket.

FIG. 1 shows the proposed switch, a general view; in fig. 2 - node I

20 in FIG. one; in fig. 3 shows section A-A in FIG. 2; in fig. 4 - fiddle II in FIG. one.

Claims (1)

The switch contains a conical case 1, to the vertex of which an inlet pipe 2 is connected, a switching element 3 with a drive shaft 4, a cover 5 on which nozzles 6 with outlet pipes 7 are fixed. The switching element 3 is made in the form of a hollow truncated cone fixed on a guide sleeve 8 mounted on the drive shaft 4 with the possibility of moving along its axis but transectional grooves 9, made in the lower part of the shaft 4, into which the teeth 10 are made, made in the pulley 8. The switching element 3 is connected with the end face m shaft 4 elastic membrane II. Neon the cone is fitted with an elastic ring gasket 12, nagfimer, made of rubber. The switch body 1 has an annular abutment 13 on which a rubber gasket 14 is fixed. The switching element 3 has a pipe 15 with a conical outer surface and a hole 16. The pipes 17 are made with conical holes interacting with the conical surface of the pipe 15. The drive shaft 4 is fixed arrow 18 with a flag 19 interacting with position sensors 20, for example, in the form of contactless limit switches. The number of sensors 20 corresponds to the required number of positions of the switching element. The switch works as follows. Before starting to transport cement, select the desired feed direction. To do this, using a drive (not shown), rotate the drive shaft 4 until the flag 19 is aligned with the corresponding position sensor 20. In this case, the switching element is installed in a position in which the pipe 15 is coaxial with the pipe 17 corresponding to the selected direction of transport. Since the cement system is always purged with compressed air prior to the transportation of cement, this air flow, acting on the switching element, moves it along the grooves 9 of the shaft 4, until it rests on the ring, an elastic stop 13, with its elastic gasket 12. the conical surface sits in the conical opening of the nozzle 17, providing the necessary tightness during the passage of the cement-air mixture. The elastic membrane 11 prevents clogging of the grooves 9 of the shaft 4. After the termination of the transportation of cement and the purging of the path, the switching element 3 returns to its original position under its own weight. If it is necessary to set the switch horizontally in order to return the switching element to its initial state, it must be spring-loaded. The proposed switch is simpler in comparison with the known construction and more reliable in operation, since it lacks a special drive for pressing the switching element. The absence of a drive and the execution of a switching element in the form of a hollow cone leads to a reduction in energy consumption, reducing the cost of repairing the switch. Claims of the direction of the pneumatic transportation of bulk materials, comprising a conical case with an inlet pipe and outlet pipes mounted in its lid, mounted on the inner surface of the lid coaxially with the last nozzle with conical holes, switching element mounted on the vertical shaft to rotate from drive and equipped with a nozzle with a conical outer surface that interacts with these conical holes, and fur the clamping element of the switching element in a predetermined position, characterized in that, in order to increase reliability and simplify the design, vertical guide grooves are made on the shaft, and the switching element is designed as a hollow truncated cone and mounted on the shaft with the possibility of reciprocating movement along the specified grooves, wherein the switching element is provided with an annular sealing gasket installed on the periphery of its outer surface and an elastic membrane attached to the inner e surface and the lower end of the shaft, and an annular abutment is mounted in the housing, which interacts with the annular sealing gasket. Sources of information taken into account in the examination 1. Patent of Germany No. 1224665, cl. 81 E 75, 1969 (prototype). FIG. Have