RU2696417C1 - Device for quick-detachable connection - Google Patents

Abstract

FIELD: machine building.

SUBSTANCE: invention relates to machine building, particularly, to devices used as clamping devices with tightness of connection, and can be used in reference instruments, in collectors for checking pressure gauges, sensors and other pressure measuring devices. Device for quick-detachable connection of cylindrical housing 1 of reference device includes a clamping element put on it with the possibility of movement along axis of housing 1, made in the form of holder 2, spring-loaded from below by spring 3. Inside housing 1 there is hollow piston 4 with seal 5 spring-loaded by spring 6. On the end of piston 4 there is seal 7 for tight connection of the tested device. Between cylindrical housing 1 and holder 2 there is a fixing connection element, which is threaded bushing 8, which has uniformly made longitudinal cuts 9 along the entire length and placed on end faces of cuts in recesses 10 of spring 11. Threaded sleeve 8 envelopes cylindrical housing 1 and with its cams 12 engages groove 13 in cylindrical housing 1 of reference device. Cylindrical housing 1 has a smooth outer surface. Bushing 8 can be opened in upper part under action of springs 11, and on other side is covered with inner surface of holder 2. Inside threaded bushing 8 there is thread commensurate with thread on threaded union 14 of tested device 15. Inside cylindrical housing 1 along its axis there is hole 16 for supply of working medium to verified instrument 15.

EFFECT: invention simplifies the procedure for assembling a measuring device with quick-detachable connection elements and increases reliability and strength of a quick-detachable connection.

1 cl, 4 dwg

Description

The invention relates to the field of engineering, in particular to devices used as clamping devices to ensure tightness of the connection, and can be used in standard instruments, in manifolds for calibrating pressure gauges, sensors and other pressure measuring instruments having a threaded fitting.

Known devices for high-speed compounds described in the reference manual, volume 2 "Fundamentals of design", M., Engineering, 1988 by P.I. Orlov (p. 219, 220) in the form of quick-action couplings for connecting and disconnecting pipelines manually, in which coaxially located parts are inserted one into another and fixed in any way with pins in hooks, spring stops, balls and others. Sealing between parts is carried out on mating diametrical surfaces.

In these quick couplings there is no mechanical seal necessary for the tight connection of measuring instruments with threaded fittings.

Known clamps for connecting calibrated pressure gauges specified in the book "Manometers", M., Publishing House MPEI, 2003, author Mulev Yu.V. (Fig. 7.2. p. 183, 184), which show that the clamps can only be used when the calibrated pressure gauge is pre-screwed into the sleeve with a notch. Such clamps are used in VNIIMS, Moscow, on pressure regulators of types AZD and AZDG.

Also known are quick-acting couplings (clamping devices) used on deadweight testers manufactured by the Donetsk Experimental Plant Etalon, Ukraine (product catalog), and in particular on the portable deadweight tester MPP-60M and the CPV 5000 deadweight tester manometer designed for Wika (Germany) verification of measuring equipment.

Closest to the technical nature of the claimed device is a quick-connect, described in clause RF No. 2399827 "Device for quick-connect" according to cl. F16L 37/00, 03/03/2009, op. 09/26/2010 manufactured by JSC Metran SG and selected as a prototype.

Known quick-detachable connection includes a clamping element in the form of a nut with handles screwed onto the connected parts of the measuring tool in the form of a threaded fitting and a reference device with a cylindrical body with an external thread and a smooth upper part, and a fixing element located inside the nut with handles, which is an intermediate sleeve with cams, and the connected part of the reference device in its upper smooth part of the housing is a split sleeve with an internal threaded surface, covering I have both parts to be connected, having through L-shaped grooves and installed with the possibility of engaging with the cams of the intermediate sleeve and the possibility of removing it from the intermediate sleeve by rotation around the axis.

A disadvantage of the known device is the inconvenience of operation and the unreliability of the quick coupler due to the following. To use a quick-detachable connection in order to connect measuring instruments with threaded fittings to reference instruments or other devices, it is necessary to cover the threads of the measuring instrument’s connecting nipple with two halves of the split sleeve, so that the end surfaces of the halves of the split sleeve are in the same plane, which indicates that the turns of the split bushings in height coincided with the threads of the threaded fitting. After that, the threaded sleeve, with the threaded fitting of the measuring device covered by it, must be inserted into the intermediate sleeve of the known device for quick connection and the grooves in the split sleeve must be aligned with the cams of the intermediate sleeve, which causes some difficulty, since the split sleeve has two cuts of a certain size for the whole the length of the sleeve, and the plane of the cuts can be in contact with each other, which determines the non-symmetrical location of the L-shaped grooves relative to each other and they will not coincide with cams of the intermediate sleeve located symmetrically. Also, due to the fact that the split sleeve with the threaded fitting of the measuring tool is inserted into the blind intermediate sleeve, it is difficult to control the completeness of engagement of the cams of the intermediate sleeve with the L-shaped grooves of the split sleeve. Next, it is necessary to rotate the nut of the device until the end of the threaded fitting of the measuring device is pressed through the seal to the surface of the end face of the upper smooth part of the cylindrical body of the device for quick connection. The greater the distance between the end of the threaded fitting of the measuring device and the end of the upper smooth part of the cylindrical body of the device, the more revolutions of the nut must be made.

All this requires additional time for preparing the measuring tool for verification. Also, the L-shaped grooves weakening the strength of the split sleeve and the protruding cams from the intermediate sleeve are elements of unreliability of the quick coupler.

The objective of the proposed technical solution is to reduce the assembly time while simplifying the design and increasing the reliability of the connection.

The problem is solved in that in the device for quick connection, including the clamping element with a cylindrical hole, covering the connected part of the device being verified, made in the form of a threaded fitting, and the connected part of the reference device, made in the form of a cylindrical body with a smooth upper part, and a fixing element located inside the clamping element and representing a sleeve with cams, ACCORDING TO THE INVENTION, the clamping element is made in the form of a clip worn on the upper part of the cylinder a drum housing with the possibility of movement along its longitudinal axis, and spring loaded from below on a smooth lower bottom of the cylindrical body by a spring, while in proportion to the cams of the sleeve of the fixing element, a circular groove is made on the smooth upper part of the cylindrical body, and the sleeve itself is made with an internal thread under the threaded the nozzle of the measuring device and has along the entire length of its side surface evenly spaced longitudinal cuts, on the side walls of which are made eniya springs for installation.

The implementation of the clamping element in the form of a cage, worn on the connected parts of the reference and calibrated devices, while performing a smooth entire surface of the cylindrical body of the reference device, the lower part of which is fitted with a spring that compresses the bottom of the cage, which can freely move along the axis of the cylindrical body simplifies the design of the device.

The implementation of the locking element in the form of a threaded sleeve having uniformly distributed longitudinal sections along the entire length and spring holes located at the ends of the sections, which covers the cylindrical body and engages with its cams in the groove in the cylindrical body of the device and has the ability to open in the upper part under the action of the springs located in the holes at the ends of the cuts, and to cover the threaded part of the connecting fitting, and not to screw on it, thus allows follow the procedure for assembling a measuring tool with quick-connect elements, increase the reliability and strength of the quick-connect, and reduce the time it takes to prepare the measuring tool for verification.

EFFECT: reduced assembly time of a quick-detachable connection with a measuring tool and increased reliability of the connection.

The inventive quick-detachable connection has a novelty in comparison with the prototype, differing from it by the presence of such essential features as the execution of the clamping element in the form of a cage, worn on the upper part of the cylindrical body with the ability to move along its longitudinal axis, and springing (pressing) from below worn on a smooth lower part of the cylindrical body by a spring, performing on a smooth upper part of the cylindrical body of a circular groove commensurate with the cams of the fixing sleeve, execution of this a threaded sleeve with a female thread under the threaded fitting of the measuring device, which has evenly spaced longitudinal cuts along the entire length of its side surface, on the side walls of which are made recesses for installing springs, which together provide the desired result.

The applicant is not aware of technical solutions containing the above distinguishing features, which together ensure the achievement of the specified result as in the claimed object, and therefore he believes that the claimed device meets the criterion of "inventive step".

The inventive device for quick connection can be widely used in industry for quick and reliable assembly of measuring instruments with threaded fittings with reference devices, collectors and other devices and therefore meets the criterion of "industrial applicability".

The invention is illustrated by drawings, which are presented in:

- FIG. 1 - device for quick-detachable connection assembly with a fixed measuring means;

- FIG. 2 - a device for quick-detachable connection assembly with a loose measuring means;

- FIG. 3 is a view of a sleeve with tears along the line of the location of the recesses in its longitudinal sections.

- FIG. 4 - general view of the fixing sleeve;

A device for quick connection (Fig. 1) of a cylindrical body of a reference device with a threaded fitting of the device under test includes a clamping element mounted on a cylindrical body 1 with the possibility of movement along its axis, made in the form of a cage 2, spring loaded from below by a spring 3. Inside the cylindrical body 1 a hollow piston 4 with a seal 5, spring-loaded with a spring 6. is located. A seal 7 is placed on the end face of the piston 4 to ensure a tight connection of the instrument being verified. Between the cylindrical body 1 and the casing 2, a connection fixing element is installed, which is a threaded sleeve 8, which has longitudinal sections 9 evenly spaced along its lateral surface along the entire length and located at the ends of the sections in the recesses 10 of the spring 11 (Fig. 4). The threaded sleeve 8 covers the cylindrical body 1 and with its cams 12 is engaged with the groove 13 in the cylindrical body 1 of the reference device. In this case, the cylindrical body 1 has a smooth outer surface. The sleeve 8 has the ability to open in the upper part under the action of the springs 11, and on the other hand it is covered by the inner surface of the casing 2. Inside the threaded sleeve 8 there is a thread commensurate with the thread on the threaded fitting 14 of the device being checked 15. Inside the cylindrical body 1 there is a hole 16 along its axis for supplying a working medium to the device being verified 15.

A device for quick connection works as follows.

When moving down the casing 2 (Fig. 2) along the axis of the cylindrical body 1 with overcoming the resistance of the spring 3, the upper part of the threaded sleeve 8 above the upper surface of the cage 2 is released and the threaded sleeve 8 is opened under the action of the springs 11 (Fig. 3) located in the recesses 10 at the ends of longitudinal sections 9 of the threaded sleeve 8. In this case, the diameter of the threaded part of the sleeve 8 becomes larger than the threaded part of the connecting fitting 14 of the device to be verified 15. The cams 12 are engaged with the groove 13 in the cylindrical body 1 and prevent the axial movement of the threaded sleeve 8 down. The piston 4 occupies an elevated position under the action of the spring 6 by the value of its free state. When the threaded fitting 14 of the device 15 to be inserted is inserted into the opened threaded sleeve 8 with compression of the spring 6, the spring-loaded piston 4 and the end of the threaded portion of the connecting threaded fitting 14 are sealed by means of a seal 7.

When moving up the casing 2 (Fig. 1) along the axis of the cylindrical body 1 using the spring 3, the inner surface of the casing 2 runs onto the open outer surface of the threaded sleeve 8, forcing it to close and grasp the threaded fitting 14 of the device being checked 15. Cams 12 are engaged with a groove 13 in the cylindrical housing 1 of the reference device and prevent the axial movement of the threaded sleeve 8 up. Through the hole 16 in the cylindrical body 1 and the hollow piston 4, the working fluid under pressure is supplied to the verified device 15. Acting on the area of the piston 4, the working fluid under pressure further presses the piston 4 against the end of the threaded fitting 14 of the verified device 15, thereby providing an even larger tightness of the connection.

Thus, using a device with a very simple design for quick-detachable connections, quick and tight assembly of measuring instruments with a threaded fitting with reference devices, collectors and other devices is carried out.

Compared with the prototype of the inventive device for quick connection with a simpler design provides a more reliable and quick connection of the measuring means with the reference devices.

Claims (1)

A device for quick-detachable connection, comprising a clamping element with a cylindrical hole, covering the connected part of the device being verified, made in the form of a threaded fitting, and the connected part of the reference device, made in the form of a cylindrical body with a smooth upper part, and a fixing element located inside the clamping element and representing a sleeve with cams, characterized in that the clamping element is made in the form of a cage, worn on the upper part of the cylindrical body along its longitudinal axis and a spring spring loaded from below on a smooth lower part of the cylindrical body, a spring is made commensurate with the cams of the sleeve of the fixing element on the smooth upper part of the cylindrical body, and the sleeve itself is made with an internal thread under the threaded fitting of the measuring device and has along the entire length of its lateral surface there are evenly spaced longitudinal cuts, on the side walls of which grooves are made for installing springs.

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