RU170458U1 - Bayonet end lock - Google Patents

Abstract

The utility model relates to closures for vessels, apparatuses and end sections of pipelines operating under high pressure, and can be used in various industries, in particular in the chemical and oil and gas, to provide access to the internal cavities of objects without violating their integrity during maintenance, diagnostics and repair. The bayonet end closure comprises a hollow body and a cover made with bayonet connection elements, including protrusions on the cover, covered by identical grooves on the body. The bayonet connection elements consist of at least two steps of equal width, and the distance between the protrusions on the cover and the grooves on the housing corresponds to the width of the step. The cover is mounted on the hinged lever of the pivot bearing in the bearing assembly in a cup placed on the cover, and mounted rotatably on the axis of the bearing assembly. The mechanism for moving the cover along the axis and circumference is made in the form of a gear-key, the block for locking the rotation of the cover relative to the housing consists of a piston, a sealant and a spring. The utility model increases the reliability of the shutter, reducing weight, providing ease of use with the required tightness. 1 s.p. f-ly, 4 ill.

Description

The utility model relates to closures for vessels, apparatuses and end sections of pipelines operating under high pressure, and can be used in various industries, in particular in the chemical and oil and gas, to provide access to the internal cavities of objects without violating their integrity during maintenance, diagnostics and repair.

The shutter of the reception-launch chamber is known (RF patent No. 2437022, F16L 29/00, publ. 12/20/2011), which includes a housing, a hinged convex cover with a knot for its rotation, a lid fixing unit made in the form of a toothed sector fixed to the lid with two groups of teeth, a removable gear and a rotary latch. The gear sector is made with a recess, in which, when the lid is closed, the rotary latch abuts. The gear sector and the rotary latch when the lid is in the closed position are connected by a removable bar. On the sector projections of the cover, which are in bayonet engagement with the sector projections of the housing, safety grooves are made.

A well-known end bayonet lock (RF patent No. 2418218, F16J 13/16, publ. 05/10/2011), which contains a hollow body and a hinged lid. The lid is pressed to the housing using a bayonet connection, the contact surfaces of which are made along a helical line. The cover is mounted on a hinged lever on a ball joint. The rotation of the cap around the axis occurs due to the interaction of a removable gear-wrench mounted on an axis fixed to the housing. The gear wrench interacts with the gear sector mounted on the lid, and has two working sections that provide rotation of the lid in two stages. Locking the rotation of the lid is carried out using the latch associated with the exhaust valve. The tightness of the shutter is provided by a seal located in the groove of the housing.

The disadvantages of the known valve designs are the high concentration of stresses arising during the engagement of the elements of the bayonet connection, which does not exclude the likelihood of cracks when tightening the cover and / or opening the connection with a sharp change in the pressure of the working medium in the operated facility, as well as the large overall dimensions of the valves. In addition, in patent No. 2418218, the shutter lid is rotated in two stages, which increases the time of the opening / closing process and can lead to unsafe situations.

The closest solution, selected as a prototype, is an end bayonet lock designed to lock the covers of vessels, apparatuses and end sections of pipelines operating under high pressure (patent No. 2546142, F16J 13/20, publ. 04/10/2015). The shutter includes a hollow body and a cover with bayonet connection elements. The lid is mounted on the hinged lever of the pivot bearing in an angular contact bearing in a cup mounted on the lid. Sealing elements are installed in the annular grooves of the cover, a pressure relief device inside the system and blocking the rotation of the cover relative to the housing is made in the form of a stopper. The mechanism for moving the cover along the axis and circumference is made in the form of a fork mounted on the cover and a lead screw with manual or mechanized control.

The disadvantages of the prototype, as well as analogues, are a large concentration of stresses arising from the engagement of the elements of the bayonet connection, which does not exclude the likelihood of cracks when tightening the cover and / or opening the connection with a sharp change in the pressure of the working medium in the operated facility, the complexity of the design, as well as large overall shutter sizes.

The technical problem solved by the utility model is to expand the arsenal of tools to ensure the durability and safety of the end bayonet shutter, as well as ease of use by reducing the angle of rotation of the lid relative to the housing when opening / closing.

The technical result consists in increasing the reliability of the shutter due to the redistribution of the load in the bayonet connection and reducing the concentration of stresses, improving manufacturability with the required tightness and reducing weight.

This result is achieved due to the fact that in the end bayonet lock containing a hollow housing and a cover made with bayonet connection elements, including protrusions on the cover, covered by identical grooves on the housing, the cover is mounted on the hinged lever of the rotary support in the bearing assembly in the glass, placed on the cover, and installed with the possibility of rotation on the axis of the bearing unit, and the rotary support is mounted on the housing, sealing elements installed in the ring grooves of the cover, ate blocking the rotation of the cover relative to the housing and the mechanism for moving the cover along the axis and around the circle, according to the utility model, the protrusions on the cover and the grooves on the housing are made up of at least two steps with equal width, the distance between the protrusions on the cover and the grooves on the housing corresponds to the width of the step, the mechanism for moving the cover along the axis and circumference is made in the form of a gear-wrench installed on an axis fixed to the housing and interacting with the toothed sector fixed to the cover. In addition, the cover rotation lock assembly relative to the housing consists of a piston, a seal and a spring, and is installed in the cover groove with the possibility of moving the piston into the groove made in the rotary support.

The utility model is illustrated by drawings, where in FIG. 1 schematically shows a general view of the shutter; FIG. 2 is the same in section, in FIG. 3 is a sectional view of a lock assembly for turning the lid in FIG. 4 - sealing elements.

Bayonet end closure contains:

building 1;

elements 2 bayonet connection housing;

cover 3;

elements 4 bayonet connection of the cover;

hinged lever 5;

swivel bearing 6;

bearing assembly 7;

shaft 8 of the rotary support;

bracket 9 of the rotary support;

gearbox 10;

o-ring 11;

sealing sleeve 12;

coating the surface of the grooves 13;

gear wrench 14;

gear sector 15;

limiters 16;

piston 17;

spring 19;

protective cover 20.

The bayonet closure includes a hollow housing 1, which has bayonet connection elements 2 arranged in a circle, a cover 3 with bayonet connection elements 4, the number of which corresponds to bayonet connection elements 2 of the housing 1, while the protrusions on the cover and the grooves on the housing are identical to each other.

The bayonet connection is made in the form of protrusions on the cover, each of which consists of at least two steps of equal width that enter identical grooves on the body, the distance between the protrusions on the cover and the grooves on the case corresponds to the width of the step. Connection elements are in tight engagement when they rotate around the axis of one of the connection elements relative to the other. This embodiment of the elements of the bayonet connection provides a reduction in the angle of rotation of the cover until it is completely closed. The overlapping area of the protrusions and grooves, which determines the level of contact stresses in the working position, increases to 75%. At the same time, the bending and shear stresses in the dangerous (root) section of the protrusion and groove are reduced due to the redistribution of the load by at least two steps, increasing the safety factor of the bayonet engagement elements. This allows you to significantly increase the reliability of the structure and at the same time reduce its weight by reducing the thickness and height of the protrusions and grooves, and hence the diameter and height of the cover and housing.

The number of protrusions and grooves is determined constructively, based on the properties of the material, the specified thickness, pressure and diameter of the shutter. The implementation of grooves and protrusions in the form of steps reduces the crushing area and increases the shear area, and therefore, reduces the stress concentration, increases the reliability of the connection, manufacturability and ease of use, as well as reduces manufacturing costs.

The cover 3 is fixed on the hinged lever 5 of the rotary support 6 through the bearing unit 7 mounted in a glass mounted on the cover. The pivot bearing 6 is a swivel made in the form of a shaft 8 mounted in the holes of the brackets 9 fixed on the outside of the housing 1. To open / close the shutter cover of a small diameter, for example, a bracket for manual opening can be provided on it, and when a large diameter of the cover shaft 8 is connected to the drive, for example, through a worm gear 10.

The sealing elements are a ring 11 and a sleeve 12 and are installed in the annular grooves of the cover 3, providing a more snug fit of the surface of the cover to the housing and increasing the tightness. The surface of the grooves can be made with a coating, for example, in the form of a weld metal 13 to increase the corrosion resistance of the material at the location of the sealing element.

The movement of the cover around the circumference and simultaneously in the axial direction along the helical line is carried out using a mechanism made in the form of a gear wheel 14 mounted on an axis fixed to the housing and interacting with the gear sector fixed on the cover 3. This embodiment ensures reliability and manufacturability in connection with the ease of opening the shutter, and also increases the maintainability of the shutter due to easily replaceable elements. The angle of rotation of the cover 3 when it is opened or closed is adjusted using the limiters 16 installed on the housing 1.

The locking assembly for turning the cover relative to the housing consists, in particular, of a piston 17, a seal 18 and a spring 19 and is installed in the groove of the cover 3 with the possibility of moving the piston into the groove made in the bracket 9 of the rotary support 6. A protective casing 20 can be mounted on the housing 1 , for example, on hinges with the possibility of its locking in the closed state by a lock.

The shutter operates as follows. When closing the shutter, the cover 3 is manually turned, for example, by means of a hinged lever 5 of the pivot bearing 6, for example, by means of a bracket or by means of a reducer 10 (with a large shutter diameter) around the shaft 8, which is installed in the holes of the bracket 9 of the pivot bearing 6, until it contacts the housing surface . The elements of the bayonet connection of the cover 4 are freely placed in the grooves between the elements of the bayonet connection of the housing 2, and the bearing assembly 7 provides radial and axial rigidity of the cover on the rotary mechanism, the accuracy of installation and fixation of the cover on the surface of the housing.

The cover 3 is rotated by means of a gear wrench 14 mounted on the axis of the housing and interacting with the gear sector fixed to the cover 15. The cover receives axial movement along the line of multiple threads (each cover protrusion is at an angle like a thread) around the circle at an angle specified design calculations, for tightening the sealing elements 11 and 12 and the final clamping of the cover. In this case, the bayonet connection elements engage, providing a reliable connection of the cover to the housing, the angle of rotation of the cover is regulated by the limiters 16. Thus, the detachable connection of the cover to the housing is provided by axial movement of the bayonet connection elements of the cover along the grooves of the cover and relative rotation of the cover during final clamping.

To block the rotation of the cover relative to the housing, a safety assembly is provided, which consists, in particular, of a piston 17, a seal 18 and a spring 19. Under the influence of the pressure of the medium inside the shutter, the piston 17 installed in the groove of the cover 3 enters the groove made, in particular, in the bracket of the rotary support 6, fixing the shutter in the closed position. A protective cover is installed on the shutter and locked with a lock. The shutter is opened in the reverse order.

The bayonet end gate was tested during testing on a pipeline with a nominal diameter of 500 mm and a working pressure of the internal medium of 11.8 MPa. During the test, leaks and droplet formation were not observed, all shutter elements worked as usual, equipment failure did not occur. After depressurizing, the cover rotation lock assembly unlocked the opening movement of the cover. When depressurization and opening the shutter, moving the cover did not create a traumatic situation for the operator.

Using the proposed shutter will improve the reliability of the shutter, which will lead to an increase in durability, and the safety of the shutter, as well as provide a reduction in its weight and increase manufacturability, providing ease of use with the required tightness.

Claims (2)

1. Bayonet end bolt, comprising a hollow housing and a cover made with bayonet connection elements, including protrusions on the cover, covered by identical grooves on the body, the cover is mounted on the hinged lever of the pivot bearing in the bearing assembly in a glass placed on the cover, and installed with the possibility of rotation on the axis of the bearing assembly, the pivot bearing being mounted on the housing, sealing elements installed in the annular grooves of the cover, locking assembly for turning the cover relative to the housing and a mechanism for moving the cover along the axis and circumference, characterized in that the protrusions on the cover and the grooves on the housing are made up of at least two steps that are equal in width, while the distance between the protrusions on the cover and the grooves on the housing corresponds to the width of the step, the mechanism The axial and circumferential movement of the cap is made in the form of a gear-wrench mounted on an axis fixed to the housing and interacting with the gear sector fixed on the cover. 2. The shutter according to claim 1, characterized in that the lock assembly for turning the cover relative to the housing consists of a piston, a seal and a spring and is installed in the groove of the cover with the possibility of moving the piston into a groove made in the rotary support.

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