RU1783211C - Straight flow valve - Google Patents

Abstract

Use in stop valves of vacuum equipment. SUMMARY OF THE INVENTION: A locking member is placed in the housing, the disks of which are interconnected with the possibility of movement and with a control unit. Between the disks there is a gear wheel with a spring clip fixed to it. The control unit is made in the form of a gear rack interacting with the clip. 2 ill.

Description

The invention relates to shutoff valves used in vacuum technology.

A shut-off flow valve is known in which the shut-off sleeve is moved using two double-sided gear rails that transmit each half of the total torque to the parallel pinion shaft, which in turn are connected to the gear rack of the shut-off sleeve.

A disadvantage of this design is the low throughput of the valve due to the location of the closure in the passage section.

Closest to the technical nature of the proposed technical solution is a flow gate valve, consisting of a housing with two through-holes, in which a double-disk locking element is placed. A locking screw is mounted on the bearings in the locking element, which engages with the screw. A thread is cut in the hole of the worm wheel: from one side to the left undercut,

and on the other hand, the rights by which a wheel is associated with disks designed to block passage openings,

The control unit serves to ensure the movement of the locking member in a vertical plane and consists of a worm shaft passing through an opening of a hollow screw having an L-shaped hook. There are two flywheels on the worm shaft, which allow vertical movement of the locking member and horizontal movement of the discs.

The disadvantage of this design is its complexity due to the presence of two flywheels.

The purpose of the invention is to simplify the design.

This goal is achieved by the fact that instead of the worm gear, a locking gear uses a gear that moves along the guides of the housing, and the control unit contains a pusher made in the form of a gear rack, whose movement along the guides of the housing

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It is secured by a spring retainer having a spring stiffness greater than the frictional force generated by the movement of the locking member, moreover, during one movement of the pusher, the locking member moves and the disks move.

Comparative analysis with the prototype shows that the plug-in flow valve is characterized by the use of a gear instead of a worm wheel, and a pusher made in the form of a gear rack instead of two flywheels, the movement of which is carried out along the guides of the casing, which connected to the closure by means of a spring clip.

It is known to use a gear in locking fittings that engage with a gear rack,

However, it was not possible to carry out the movement of the locking member and the expansion of the locking discs in one movement of the pusher.

In FIG. 1 shows a flow valve in the closed position; in FIG. 2 is a section AA in FIG. 1,," .-,

The valve consists of a housing 1, a movable locking member and a control unit. The movable locking body consists of an upper locking disk 2 with a seal 3 and a lower locking disk 4 with a seal 5, each of which is connected to a threaded sleeve: the upper locking disk - with a threaded sleeve 6 with left-hand thread, the lower locking disk - with a threaded sleeve 7 s right-hand thread, as well as gear 8 with fluoroplastic overlays 9, 10. Gear 8 is rigidly mounted on the shaft 11, which has right and left threads at opposite ends, and moves freely along the guides of the housing 12. To limit scheni locking discs mounted on the housing 13. The lock control device is a pusher 14 configured as a toothed rack. The connection between the pusher and the locking body is carried out using a spring clip 15, the housing 16 of which is rigidly connected to the gear.

The operation of the flow valve is as follows

Drive pusher 14

together with the locking element begins to move along the guides of the housing 12 until the fluoroplastic linings 9 of the gear 8 reach the wall of the housing 1. The locking body stops, the spring clip 15 disengages from the pusher 14, which, while continuing to move, rotates gear 8. In this case, the screw pairs (sleeve-rod) begin to unwind and the locking discs 2 and 4 move apart, which close the passage opening. During the reverse stroke of the pusher, when it is necessary to open the valve, the gear wheel 8 starts to rotate in the opposite direction, the screw pairs (sleeve-rod) are twisted, the locking discs begin to move. As soon as the distance between the seal 3, 5 and the housing 1 is greater than the fixed height.

sator 13, the spring clip 15 enters the groove of the pusher 14 and the further movement of the pusher occurs together with the locking element. The valve opens. The proposed valve design allows the range of actuators to be expanded. In this design, it is possible to use a pneumatic drive, an electric drive, manual.

Claims (1)

The claims A solenoid valve comprising a housing with a double-disc located therein a locking body, the disks of which are interconnected with the possibility of movement and with a control unit, characterized in that, in order to simplify the design, a gear wheel with a spring clip fixed to it is placed between the disks of the locking body, and the control unit is made in the form of a gear rails mounted with the ability to interact with the latch. "IG. 1 Editor S. Kozlova JS. 2 Compiled by Y. Putilov Tehred M. Morgenthal Corrector N. Milyukova