RU233119U1 - Open-end wrench head for mounting and dismounting a cylinder valve - Google Patents

Abstract

The utility model relates to the operation of gas-cylinder vehicles using natural gas as fuel and can be used to perform work on dismantling and assembling the EMER cylinder valve, which is widely used in the operation of gas-powered vehicles in the Russian Federation during the technical inspection of gas vehicle cylinders (methane), as well as during the maintenance and repair of gas-cylinder equipment. The head of the open-end wrench for mounting and dismantling the cylinder valve has a cylindrical body with a hexagonal nut for the open-end head, a technological groove is made inside the body, the shape of which repeats the shape of the protruding parts of the valve, and grooves are made along the circumference of the body with the formation of a gripping mechanism between them, consisting of separate segments of the body, capable of contacting with the protruding parts of the valve. The technical result consists in creating a head of the open-end wrench, ensuring the installation and dismantling of the cylinder valve without damaging its body, due to the tight fit of the head surfaces to the surfaces of the valve body. 7 fig.

Description

The utility model relates to the operation of gas-cylinder vehicles using natural gas as fuel in accordance with GOST 27577-2000 (https://docs.cntd.ru/document/1200017921).

The device can be used to perform work on dismantling and installing the EMER cylinder valve, which is widely used in the operation of gas-powered vehicles in the Russian Federation, during technical inspection of gas vehicle cylinders (methane), as well as during maintenance and repair of gas cylinder equipment.

The offered open-end wrench head ensures precise fit at the points of the valve body power structure, which allows creating the necessary moment for safe unscrewing (dismantling) of the asymmetric design cylinder valve from the high-pressure gas cylinder. After the necessary work has been carried out, the wrench allows for the installation of the valve with the required tightening moment.

A special key for mounting EMER cylinder valves from RariTEK is known (https://raritek.ru/catalog/servisnoe-oborudovanie/114690/). The key is a head for installation on a torque screw and subsequent mounting and dismounting of EMER MFKL 518 cylinder valves.

The problem with the application is the contact of the key head surfaces with the cylinder valve surfaces, since RariTEK keys do not provide a precise fit.

In the proposed design, the valve is fixed with a key as precisely as possible. This is ensured by the shape, profile and height of the milling performed, the shape and depth of the groove performed, and the shape of the key fixation. Comparative tests during repair work and inspection of gas cylinders have shown the effective use of the key due to the high-quality adhesion of the surfaces and the possibility of using a specialized tool without transition devices.

In accordance with the technical regulations on the safety of operation of wheeled vehicles TR CU 018/2011 (https://eec.eaeunion.org/upload/medialibrary/2a3/TR-TS-018_2011.pdf), a mandatory requirement is to carry out work on periodic inspection of gas cylinders in accordance with the passport for the gas cylinder, which indicates the frequency of verification.

The need for such work also arises in the event of a technical malfunction of gas cylinder equipment, when gas leaks from the valve thread, the valve valves (safety, fire) fail, the connection threads of the high-pressure main pipes are leaky or damaged.

When using standard plumbing tools, it is easy to damage the valve body, since it is made of low-melting metals (copper, bronze, brass). Minor damage to the body or any other element of the design leads to complete failure of the unit.

The objective of this utility model is to create a gentle and easy-to-use key due to high-quality adhesion of surfaces and the possibility of its use without transition devices.

The specified problem is solved by the fact that a key head has been developed for mounting and dismounting a cylinder valve, which has a cylindrical body to which a hexagonal nut for a union head is welded, a technological groove is made inside the body, the shape of which repeats the shape of the protruding parts of the valve, and grooves are milled along the circumference of the body to form a gripping mechanism consisting of individual segments.

The technical result is achieved by the fact that the head of the open-end wrench allows for precise fit with the help of segments to the parts of the cylinder valve body that can be acted upon, applying pressure to the maximum area of the free surface. The head of the wrench is placed on top of the valve to the depth of the valve body, the segments tightly embrace the body. The milling of the wrench body exactly repeats all the protruding parts. This solution allows for no damage to the protruding parts of the valve during dismantling and installation.

The essence of the utility model is explained by drawings and photographs. Fig. 1 shows a general view of the key for dismantling and assembling the EMER cylinder valve.

The key head has a cylindrical body 1, to which a hexagonal nut 2 for a socket head for connection with a torque wrench is welded by electric arc welding; inside the body 1, a technological groove 3 is made, the shape of which repeats the shape of the protruding parts of the valve, and grooves are milled along the circumference of the body 1 to form a gripping mechanism consisting of four separate segments 4.

Fig. 2 shows the process assembly. The methane gas cylinder 5 is clamped in the cradle. The head 7 of the cylinder wrench is installed on the cylinder valve 6. A torque wrench 8 with a socket head 9 is used for assembly/disassembly.

Fig. 3-5 shows the key head from different angles, Fig. 6-7 shows the same with the valve installed.

The dimensions and thicknesses of the structural elements are determined by calculation in order to ensure maximum strength characteristics and a high shear resistance.

The key head allows for the installation/dismantling of the cylinder valve in a repair shop. It ensures a tight fit to the surfaces of the valve body, which eliminates misalignment, uneven torque load on protruding elements, and fracture of lagging parts of the unit.

The head of the key 7 is placed on top of the valve 6 so that the segments fit tightly and come into direct contact with the body of the valve 6 without free play or play. The torque wrench 8 is installed in the head of the key 7. The gas cylinder 5 must be securely fixed. Then, the valve 6 is slowly and without jerks unscrewed from the cylinder 5. The installation of the valve 6 is carried out in the reverse order after the next inspection of the cylinder 5 or current repair. The use of a torque wrench with a socket head allows you to exclude the breakage of the body and valves of the cylinder valve, and also to ensure the necessary tightening force, which is regulated by regulatory documents for these types of work.

Tests of the proposed device for dismantling and assembling a cylinder valve were conducted at the facilities of Gazprom Dobycha Noyabrsk LLC. The results showed the simplicity and reliability of using a specialized key. The labor intensity of the technological operation for dismantling and assembling a gas cylinder valve was reduced.

Claims (1)

A socket wrench head for mounting and dismounting a cylinder valve, characterized by the fact that it has a cylindrical body with a hexagonal nut for the socket head, inside the body there is a technological groove, the shape of which repeats the shape of the protruding parts of the valve, and along the circumference of the body there are grooves with the formation of a gripping mechanism between them, consisting of separate segments of the body, having the ability to contact with the protruding parts of the valve.