RU30177U1 - Flexible hoses - Google Patents

Description

Docking of sleeves using a known connection is possible only on special equipment in the conditions of established production.

The technical result when using the invention is to obtain a reliable small-sized connection, ensuring its free movement between the rollers guiding the sleeve onto the drum for winding (unwinding), as well as the possibility of the formation of a new joint of the sleeves during breaks in conditions close to field conditions.

The specified technical result is achieved by the fact that in the connection of flexible hoses containing a double-sided fitting with sealing ridges, two wire springs, the tightening ends of the sleeves on the fitting with deformation of their walls, and bushings covering the springs in the outer diameter without a gap, a bilateral fitting in the middle part equipped with a shoulder with longitudinal holes in which one ends of the springs are bent, and each sleeve has a thread on the outer surface with a pitch equal to at least one wire diameter, and from one end oblique through h, the slope of which is opposite to the direction of the thread winding from this end, while one of the faces of the oblique groove at the intersection with the bore of the sleeve forms an obtuse angle through which the second end of the spring is bent into the groove, and the bushings are installed so that their ends with oblique grooves located at the ends of the double-sided fitting.

Figure 1 shows a General view of the connection of flexible hoses; figure 2 is a view on the left of the connection; in Fig. 3 is a cross section bB along the shoulder of the fitting; figure 4 and 5 is a General view of the device; 6,7,8 and 9, the connection sequence of the flexible hoses in the device.

The connection contains a double-sided fitting 1 with sealing ridges (scallops), two springs 2 made of wire, tightening the ends of the sleeves on the fitting with deformation of their walls, and two bushings 3 and 4, covering the springs along the outer diameter without a gap. The fitting in the middle has a collar 5, in which several longitudinal holes 6 are made, in two of which one ends of the springs are wound and bent.

The diameters of the holes in the bushings and the diameter of the collar in the fitting are made the same, slightly exceeding the actual diameter of the connected sleeves. The diameter value is determined by the formula

In Vf + 2a-28-Ast, where D is the diameter of the holes in the bushings and the shoulder in the fitting;

d is the diameter of the wire spring in the connection; Bf - the actual diameter of the joined sleeves in the connection; S - actual thickness; ina of the sleeve wall;

Det-permissible deformation of the sleeve wall when tightening with clamps (according to the standard).

For example, GOST 18698-79 "Pressure head rubber hoses with a textile frame sets ACT equal to:

Each sleeve from one end has an oblique through groove 7, and the outer diameter of the thread, the pitch of which is equal to at least one diameter of the spring wire. One of the faces of the groove at the intersection with the bore of the sleeve forms an obtuse angle 8. The second end of the spring is inserted into and into the groove through an obtuse angle.

The inclination of the oblique groove is opposite to the direction of the thread winding from the end on which the groove is located.

The connection of the sleeves according to the invention is made in a simple device, fixed, for example, at the sleeve drum on a machine.

The device includes a detachable housing 9 and a detachable collar 10. The housing has a cover 11, a base 12 and parts for attaching the cover to the base. The housing is equipped with a threaded hole B, the center of which is located in the plane of the cover and base connector. The diameter and thread pitch of hole B are equal to the diameter and thread pitch on the bushings included in the sleeve connection. The clamp is made of two half rings 13 and 14, pivotally mounted at one end on an axis 15, screwed into a threaded hole on the base of the housing. The second ends of the half rings are interconnected

4-S

the tightening screw 16 and the nut 17. In a tightened form, two half rings form a hole in the clamp, coaxial with the threaded hole B of the housing. The diameter of the hole in the clamp corresponds to the outer diameter of the flexible hoses joined by the connection according to the invention.

The connection of the flexible hoses according to the invention in the described device is as follows.

Install and fix the device, for example, in a bench vise (Fig.6). Unfasten and remove the cover 11 from the base 12, open the clamp.

The sleeve 4 is put on the right sleeve, orienting it with an oblique groove outward from the housing. The sleeve 3 is installed in the threaded half-hole B of the base 12, while its oblique groove should be located on top of the left end of the sleeve. Install the cover 11 on the base 12 and secure.

The fitting 1 is installed in the sleeve 3, while the longitudinal holes in the shoulder of the fitting must be on top.

Put on the sleeves on the fitting and the right sleeve is clamped in a fixture using gaskets.

A wire is taken with a length equal to the unfolded length of one spring in the connection, with one end inserted into one of the visible longitudinal holes in the collar of the fitting and bent into the oblique groove of the sleeve 3.

The sleeve 3 with a key is rotated in the direction of inclination of the groove. At the same time, it is unscrewed from the housing 9 (see Fig. 7), and the wire, enveloping the blunt edge of the groove, is drawn inside the sleeve and wound onto the sleeve with deformation of its wall - the process of pulling the sleeve on the fitting with wire. Before the last two turns of the thread exit from the hole B, the rotation of the sleeve 3 is stopped.

Unfasten and part the half rings of the clamp, move the sleeve 4 to the left and screw it into the hole B until it stops in the sleeve 3 (see figure 7). The right sleeve is clamped again on the fitting with a hose clamp.

tC (

d

Continue the rotation of the sleeve 3 until it exits the housing. At this, the contraction of the left sleeve on the fitting ends, and proceed to the contraction of the right sleeve.

Continue screwing the sleeve 4 into the hole B to a position similar to the initial position of the sleeve 3 (see Fig. 8).

Unfasten and part the half-rings of the clamp, reinstall it on the left side of the case and clamp it on the left side of the connection. A wire is taken for the second spring, one end is inserted into one of the visible longitudinal holes in the shoulder of the fitting.

Then, operations similar to those described for the sleeve 3 are performed. The rotation of the sleeve 4 is stopped: they exit at its exit from the opening B of the housing.

Pa this connection of flexible sleeves ends. Operations are carried out to disassemble the device and remove connected sleeves from it.

Claims (1)

Connection of flexible hoses, comprising a double-sided fitting with sealing ridges, two wire springs, tightening the ends of the sleeves on the fitting with deformation of their walls, and bushings covering the springs without outside clearance, characterized in that the double-sided fitting in the middle part is provided with a shoulder with longitudinal holes in which one ends of the springs are bent, and each sleeve has a thread on the outer surface with a pitch equal to at least one wire diameter, and from one end an oblique through groove, the slope of which is opposite the direction of the thread turns from this end, while one of the faces of the oblique groove at the intersection with the bore of the sleeve forms an obtuse angle through which the second end of the spring is bent into the oblique groove, and the bushings are installed so that their ends with oblique grooves are located at the ends of the double-sided fitting.