A method of manufacturing a metal cylinder high pressure

 

(57) Abstract:

The invention relates to the technology of metal high-pressure cylinders. The method is as follows: screw connection, internal thread perform external thread diameter less than the outer diameter of the thread on the response of the outer thread and an inner diameter smaller than the inner diameter of external thread for connecting parts, and the thread pitch on the inner thread are fewer steps threading, then part with an internal thread is heated to purchase their metal plastic state, for example up to 500oWith, it does not allow the formation of scale, and in a hot state their sbencivu with parts with external thread all the way into the protruding surface, which is done on one of the connected parts. The technical result - improving performance of the container. 2 C. p. F.-ly, 10 ill.

The invention relates to techniques for the warehousing, distribution and transportation of gas under high pressure, namely technology metal fabrication of high-pressure cylinders.

A known method of manufacturing a metal gas tank high pressure p is threaded connections, pressing or rolling, and by combinations of these methods (see , for example, the application 93013491/26 publ. in BI 17 from 20.06.96, MKI 6 F 17 1/00).

This known method is the closest to the technical nature of the claimed and selected for the prototype.

The disadvantages of this method include the lack of tightness of the cylinder, and thus reducing the reliability.

The purpose of the proposed technical solution is improved performance due to increased tightness and reliability of the threaded connection of the parts of the cylinder at a high pressure of gas inside the balloon.

To achieve this goal in the method of manufacturing a metal cylinder high pressure by means of a threaded connection of its parts: the body and attached thereto parts, such as covers and other parts in threaded connection to the internal thread perform external thread diameter less than the outer diameter of the thread on the response of the outer thread and an inner diameter smaller than the inner diameter of external thread for connecting parts, and the thread pitch on the inner thread are fewer steps threading, then the part with the m does not allow scaling, and in a hot state their sbencivu with parts with external thread all the way into the protruding surface, which is done on one of the connected parts. The difference between outer diameters of the thread, as well as the difference between the inner diameter and the steps of these threads could be chosen linear deformation diameters and step by heating, for example up to 500oC and additional values, due to the tightness screwing equal to, for example, linear deformation diameters and step from heat. Before screwing on the joining parts with external threads increase the hardness of the metal, for example, heat treatment type hardening.

In contrast to the known technical solutions, which are an integral part of the cylinder are connected by a thread, the proposed technical solution, with threaded connection parts of the container due to the difference of the external and internal diameters of the threads made on the housing and attachable parts, such as lids, and heating of the internal thread when the screw is plastic deformation of the internal thread, providing gapless threaded connection with the subsequent tensioning of the thread surfaces after cooling, the product was the body of the container. This improves performance of the balloon.

Comparative analysis of the proposed technical solution with the existing prior art has not revealed the source of the popularity of the presence in them of the distinctive features of the claimed technical solution with the achievement of the technical result, which allows to make a conclusion on the conformity of the proposed technical solution the criterion of "Inventive step".

To explain the technical nature of the proposed method are given drawings.

In Fig. 1 shows a General view of the container of Fig. 2 shows the section a-a from Fig. 1; Fig. 3 shows the node 1 of Fig. 2 (on the casing outer thread, and on the lid - internal), Fig. 4 shows the threaded portion, for example, a body with external thread; Fig. 5 shows a threaded portion, for example, cover with internal thread; Fig. 6 shows a variant in which the stops, limiting screw made in the case of Fig. 7 depicts a node II of Fig. 3, 8 after screwing the parts of the container of Fig. 8 shows a variant of the method, where the casing inner thread and the outer cover; Fig. 9 shows a variant of the threaded part of the housing with internal thread; Fig. 10 depicts calorific pressure can be carried out, for example, in the next version.

The high-pressure bladder 1 is made from the housing 2 (Fig. 2), the terminal parts which perform an external thread standardized type (Fig. 4) with standardized dimensions for the diameters and step. The outer diameter of the thread has dimension d, and the inner thread diameter - d1. On the threaded parts of the body 2 pre-increase the hardness of the metal, for example, by the method of heat treatment (quenching). On joining this thread parts, such as covers 3 or other parts, perform internal screw thread (Fig. 5).

Thread attached parts, such as caps 3 have an outer diameter D, the value of which is smaller than the outer diameter d, is made on the housing 2, and the size of the internal thread diameter D1made in the attached parts, such as lids 3, is smaller than the inner diameter d1thread made on the housing 2. At this step, the thread T in the attached parts, such as lids 3, less than the thread pitch t on the housing 2.

The outer diameter D of the thread to join the parts, for example the lid 3 (Fig. 7), is determined by the formula D= d-2N, where N is half the magnitude of the difference between the outer diamete d, made on the housing 2, by heating these areas, for example, up to 500oC;

h - additional amount required to create the interference fit on outside diameter of the threads when screwing equal to, for example, d.

Inner diameter D1thread of the attachable parts, for example on the cover 3 (Fig. 7), is determined by the formula

D1= d12H1,

where N1- half the magnitude of the difference between the internal diameters of d1and D1and is determined by the formula

< / BR>
where d1- linear deformation plots of thread sizes1made on the housing 2 by heating these areas, for example, up to 500oC;

h1- additional size to create tension on the inner diameters of the thread when the screw equal to, for example, d1.

The thread pitch on the joining parts, for example on the cover 3 (Fig. 4), in unheated condition is determined by the formula:

T= t-(t+H2)

where t is the linear deformation of the thread pitch on the body is heated, for example, up to 500oC;

H2- additional size to create tension on the thread when the screw equal to, for example, t.

Internal thread mating cadventure attachment part, for example, the cover 3 is heated to a temperature, for example up to 500oC, at which the metal becomes plastic, without the formation of scale on heated surfaces, which when sealed threaded connection is invalid.

Heating at lower temperature reduces the ductility of the metal, which increases the force of tightening.

After heating the joining parts with internal thread, for example, covers 3, make them screw on unheated threaded part of the housing 2.

When the screw is heated, for example, up to 500oC attachment parts, such as lids 3, in unheated areas of your thread made on the housing 2, on which the pre-improved hardness, deformation of the relevant sections of the internal thread due to the plasticity of the heated metal. You get a backlash-free connection.

Screw attachment parts, such as lids 3, produce to another end surface B (Fig. 4) of the housing 2 with the protruding surface 4 (Fig. 5), made for example on the attachment part, for example the cover 3 (Fig. 3). You can perform the protruding surface 5 on the housing 2 (Fig. 6). When this screw mounting castaway surface 5.

Then, when the cooling of the joined parts, such as lids 3, there is a seal surface of the thread due to the tightness on the outer and inner diameters of the thread and its step.

A method of manufacturing a high-pressure bladder may be implemented in another embodiment (Fig. 8), wherein in the housing 2 (Fig. 9) is executed, the internal thread with external diameter D, the inner diameter of D1and step T, and on the cover 3 (Fig. 10) is " male thread with external diameter d, the inner diameter of d1and with step t.

The value of the difference between outside and inside diameters of the steps of the threads, and the method of connecting the cylinder with a heating part having an internal thread, for example, up to 500oC perform similarly to the previously described production version of the balloon.

While screwing the lid 3 to produce interaction between the surface G (Fig. 10) from the top surface 6 (Fig. 9).

You can perform a protruding surface on the outer surface of the cover 3 (Fig. 9, 10), which is a stop for the end face of the housing 2 when the screwing of the connected parts.

1. A method of manufacturing a metal cylinder high pressure by the screw coupling of the SOS is in threaded connection to the internal thread perform external thread diameter less than the outer diameter of the thread on the response of the outer thread, and an inner diameter smaller than the inner diameter of external thread for connecting parts, and the thread pitch on the inner thread are fewer steps threading, then part with an internal thread is heated to purchase metal plastic state, for example up to 500oWith, it does not allow the formation of scale, and in a hot state their sbencivu with parts with external thread all the way into the protruding surface, which is done on one of the connected parts.

2. The method according to p. 1, characterized in that the difference between the inner diameter and the steps of these threads could be chosen linear deformation diameters and step by heating, for example up to 500oC and additional values, due to the tightness screwing equal to, for example, linear deformation diameters and step from heat.

3. The method according to p. 1, characterized in that before screwing on the joining parts with external threads increase the hardness of the metal, for example by heat treatment type of quenching.

 

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