SU765586A2 - Tap valve - Google Patents

Description

This invention relates to a valve industry. The proposed crane is an improvement of the known.

From the main auth. St. No. 595573 is known for a crane comprising a housing in which a main locking member is mounted, mounted in the saddle and connected to a screw pin having a handwheel.

The saddle is made on the partition dividing the body into two cavities of the inlet and drain pipes. A cylinder is mounted concentrically with the saddle on the partition. It is the seat of an additional closure member made in the form of a hollow piston movably mounted on the spindle.

A chamber of elastic material filled with gas is installed in the cavity of the piston. Crane communicated by a locking device

A disadvantage of the known device is the lack of reliability of the crane and the presence of fluid loss during deviations from normal operation.

The purpose of the invention is to increase the reliability of the crane.

The goal is achieved by the fact that the valve is equipped with a hollow rod mounted

(54) CRANE

With the possibility of axial movement relative to the spindle, connecting it with the main locking member. In this case, the spindle is provided with a collet placed in the cavity of the stem and interacting with locking elements made in the form of spring rings with pins located one above the other in the annular grooves of the hollow rod, and the grooves matched to the inner surface of the piston.

FIG. 1 shows the construction of a crane.

10 in the closed position; in fig. 2 and 3 - locking devices.

In the housing 1 with the inlet pipe 2 and the outlet pipe 3 mounted cylinder 4 and seat 5, which is installed

15 the main valve body 6 with a hollow stem 7 movably articulated with a spindle 8, having a barrel-shaped collet 9 at one end, spring-loaded with an elastic ball 10, a flywheel 11 at the other end.

20

Claims (1)

Concentric with a hollow rod 7, a hollow piston 12 is mounted, spring-loaded relative to the cylinder 4 and the housing 1 by a spring 13, which is an additional locking member in whose cavity a chamber 14 of elastic material filled with gas is installed. On the inner surface of the new stem 7 there is an annular groove 15 in which a spring ring 16 is inserted with a pin 17, mating when aligned with an annular groove 18 formed on the inner surface of the piston 12, constituting in aggregate the main locking device. An additional locking device is installed on the hollow stem 7 above the main locking device and, similarly, consists of an annular groove 19, a spring ring 20 fo jTifits 21 matched when aligned with an annular groove 22, made on the inner surface of the piston 12. The krap works as follows. The rotation of the flywheel 11 raises the spindle 8 with the collet 9, which releases the spring ring 16, and its pins 17 emerge from the annular groove 18. The main locking member 6 remains closed under the action of the elastic forces of the collet 9 reinforced by the elastic ball 10 until the main locking device is released With the disappearance of these forces as the spindle 8 rises, the main valve body will open and the piston 12 will move ahead of the pressure of the fluid pump 8 and the circular groove 22 Tifty 21 of the spring ring 20, which did not have time to come in contact with the collet 9, will not delay the opening of the complementary constipation 101o of the organ - slug 12. Further rotation of the flywheel 11 will not affect the action of the dio.i-tsgmsnny organ and will determine the degree of opening of the main closure member 6. With structurally determined movements of the collet 9 and spindle 8 interconnected, the additional locking device can be charged, i.e. the collet 9 will elastically press the pins 21 of the spring ring 20 to the wall of the piston 12; The action of the crane will not change. The closure of the valve results in rotation of the handwheel 1 in the opposite direction. Initially, if the additional locking device was charged, the collet 9 will release the pins 21, then the collet will come in contact with the spring collar 16, the new locking device, elastically hold the pins 17 against the wall of the piston 12 and begin to lower the hollow rod 7, install the main valve body 6 in the closed position. From the moment the main closure body 6 is closed, the pressure in the cavity above the piston 12 will fall, and the piston 12 under the action of the spring 13 will drop down, shut off the outlet 3, and when the annular groove 18 is aligned with the pins 17 of the spring ring 16, the piston 12 will be fixed until the next opening of the valve . At the same time, a decrease in the volume in the cavity between the locking bodies 6 and 12 is compensated by a decrease in the volume of the chamber 14 made of elastic material with simultaneous pressing of the outer surface of the chamber 14 to the cylinder 4, which provides additional sealing. If the inlet pipe 2 is not tightly shut off by the locking body 6, the accumulated leaks will increase the pressure in the cavity between the locking bodies 6 and 12 and the elastic chamber 14 will function as a locking body according to the principle of the self-sealing cuff. The presence of the spring ring 20 with the pins 21 of the annular grooves 18 and 22 constituting the additional locking device prevents the opening of an additional locking member in cases where the valve was opened and left in the open state when the liquid was turned off from the supplied pipeline. The action of the crane is explained below by turning the handwheel 11 of the collet 9 first to release the main locking device, while the main locking member 6 will be open and the piston 12 will not be lifted, i.e. the additional locking member will be in the closed position. When the fluid is connected, the pressure will spread to the piston 12 and will move it, but before the additional valve is opened, the annular groove 22 will align with the spring-loaded pins 21 that will enter it and stop further movement of the piston 12, i.e. the additional valve will not will be open. In order to turn on the tap, in this case it is first closed and then put into operation as usual. The invention formula Crane according to ed. St. No. 595573, characterized in that, in order to increase reliability, it is provided with a hollow stem mounted for axial movement relative to the spindle and connecting the latter with the main locking member, wherein the spindle is provided with a collet disposed in the stem cavity and cooperating with locking elements , made in the form of spring rings with a pin, located one above the other in the annular grooves of the hollow rod, and on the inner surface of the piston are made mating with the grooves. . ,,. r t , (-V, J ".., -.,  , n. .76558 &