RU55925U1 - PROTECTIVE DEVICE FOR PIPE ENDS - Google Patents

Abstract

The invention relates to safety devices for protecting threaded ends of pipes. The protective device comprises a housing made of elastomeric material, for example rubber, with a threaded part, annular grooves are made on the outer surface of the cap and on the inner surface of the plug to hold the rigid elements in the form of spacer and tightening rings, there is a diaphragm integral with the housing protecting the inner cavity of the pipe. The diaphragm has a slot for equalizing the air pressure of the environment and the internal cavity of the pipe. There is a turnkey recess for mounting and dismounting the device. Cases of the device at the outer ends have roundings preventing the possibility of interconnections of the protective device with surrounding objects during transportation and transshipment of pipes, which ensures that the device is kept in its regular place.

Description

The invention relates to safety devices for protecting the threaded ends of pipes.

Known protective device for pipe ends made in the form of a cap or plug, containing, depending on the use, a cover, a metal casing mounted without a gap on a sleeve-like tip made of elastomeric material with a thickened end, or a cover, a metal plug with a sleeve-shaped cover installed on it without a gap from elastomeric material with a thickened end. (USSR Patent No. 1669406, Cl. F 16 L 57/00, 06/30/88).

The disadvantage of the described device is the complexity of the design of the device, the presence of a large number of parts, high manufacturing costs.

A protective device is known for the threaded end of a tubular part, comprising a sleeve of polymer material with a thread on the inner surface and a metal sleeve located coaxially thereon, mounted on the sleeve with thread with corresponding protrusions and grooves. (US Patent No. 4,655,256, Cl. F 16 L 57/00, 07/04/87).

Known screw protective cap for threading, consisting of a metal core with a through, axially spaced groove, strictly specified minimum width of the core and the elastic inner layer with thread. (German patent No. 3530347, CL. F 16 L 57/00, 01/30/86).

Closest to the invention is a screw cap for threading, containing a metal core covering at least the thread area. Between the core and the thread being protected, an elastic threaded intermediate layer is provided. The metal core is made of spring steel. (German Patent No. 3530348, Cl. F 16 L 57/00, 01/23/86).

The disadvantage of the described device is the complex core manufacturing technology, involving the use of sophisticated stamping equipment in the manufacture of the core, insufficient reliability of the cap fastening on the thread being protected.

The aim of the invention is to simplify manufacturing, increase the reliability of mounting the device on the protected product, increase the number of cycles of use of the device.

Figure 1 shows a protective device in the form of a cap; figure 2 - protective device in the form of a stub;

The protective device comprises a housing made of elastomeric material 1, for example rubber, with a threaded part 2, annular grooves 3 made

on the outer surface of the cap and on the inner surface of the plug, the diaphragm 4 with a slot 5, made at the same time with the housing 1, a keyhole 6, as well as rounding 7, 8, 9 along the outer ends of the device.

The annular grooves 3 are arranged evenly along the threaded part 2, to ensure a tight fit of the threaded surfaces of the protective device to the protected threaded surfaces of the pipe when installing rigid elements in the annular grooves. Rigid elements are installed in the grooves of the plug in the form of spacer rings, in the grooves of the cap are installed rigid elements working in compression, for example, from wire with further twisting and tightening. The slot 5 in the diaphragms of the device provides equalization of the air pressure of the environment and the internal cavity of the pipe and at the same time prevents the intensive penetration of atmospheric air into the internal cavity of the pipe, which prevents the formation of corrosion in the internal cavity. The turnkey recess 6 has the configuration of a polygon, for example a hexagon, with a maximum size of at least 0.3 thread diameters of the pipe being protected, which prevents deformation of the device casings during installation and dismantling of the device and allows the device to be reused for its intended purpose. Rounding 7, 8, 9 on the outer ends of the device prevents the possibility of interconnections of the protective device with surrounding objects during transportation and transshipment of pipes, which ensures that the device is kept in its regular place.

During transportation or transshipment of pipes, the proposed devices have improved operational properties, they allow you to save the threaded parts of pipes and couplings from damage and contamination under high dynamic loads and adverse environmental conditions.

Claims (5)

1. A protective device for the ends of pipes made of a polymer material, for example rubber, in the form of a cap or plug, containing, depending on the use, a body of elastomeric material in the form of a cap or plug with a thread mating with the thread of the pipe made on respectively mating surfaces of the pipe and plug and diaphragms for protecting the internal cavity of the pipe from environmental influences, characterized in that, in order to increase the reliability of mounting the protective device on the threaded surface of the pipe by installing and, tightening for the cap and spacers for the plug, rigid elements, for example of steel wire, the housing has annular grooves for fixing these elements on the surfaces of the protective device. 2. The device according to claim 1, characterized in that the housing has at least two annular grooves on the outer surface of the cap and at least two annular grooves on the inner surface of the plug, uniformly distributed relative to the threaded surface. 3. The device according to claim 1, characterized in that the diaphragms of the protective device have slots for equalizing the air pressure of the environment and the internal cavity of the pipe. 4. The device according to claim 1, characterized in that at the ends of the cap and plugs are made bevels or fillets. 5. The device according to claim 1, characterized in that the ends of the protective device have a turnkey recess for screwing the device onto the threaded part of the pipe, the radial dimension of the recess being at least 0.3 of the diameter of the pipe thread.