Ball valve for gas pipeline

Abstract

The utility model relates to the field of mechanical engineering (pipeline fittings), in particular to the design of a multifunctional ball valve, and provides a ball valve for a gas pipeline. The ball valve includes a body having a through-hole, a joint having a through-hole attached to the body, and a ball plug having a through-hole. The ball plug is installed in a seat part, and the seat part is installed inside the body and the connector and controlled by the handle. The body and the joint are each made to have a mounting region for connection with a gas conduit. The connector is made of glass filled with polyphenylene sulfide. The outer part of the mounting area of the joint is made of brass and is connected with the glass-filled polyphenylene sulfide into an inseparable whole through melting. The technical effect of using the claimed ball valve is that the electric strength of the ball valve and the capability of resisting breakdown caused by leakage current are improved to prevent emergency situations of a gas pipeline and a gas user.

Description

Technical Field

[0001] This utility model relates to the field of mechanical engineering (i.e., pipeline fittings), and in particular to the design of a multi-functional ball valve designed to function as a shut-off (or cut-off) device, and used in gas distribution networks and gas supply networks, as well as in medium-pressure and low-pressure gas pipelines in pipelines that handle gaseous media with materials neutral to the components in contact with the working environment. Background Technology

[0002] A ball valve with a triple safety system for use in explosive atmospheres is known, comprising a body with a ball plug having a through-hole controlled by a spindle having a lockable handle designed to prevent accidental opening of the valve, and being the first element of the safety system.

[0003] The second element is a shut-off valve with a spring-loaded gate designed to prevent leakage of an explosive atmosphere in the event of a pipe rupture. The third element is a thermal shut-off (or cut-off) valve with a spring-loaded pusher and a fusible (or fusible) insert designed to lock the element and prevent the release of the explosive atmosphere. The purpose of this invention is to prevent leakage of an explosive atmosphere at a pipe rupture site and to prevent accidental opening of the valve in emergencies, thereby reducing the likelihood of personal injury and the amount of material loss (Russian Federation Invention Patent No. 2726972, IPC F16K 5 / 06, 2016).

[0004] This technical solution was adopted as the prototype that most closely resembled the proposed technical solution.

[0005] In this well-known device, a triple safety system is automatically triggered in the event of an emergency on the gas pipeline. However, a drawback of this solution is that it cannot provide protection against emergencies caused by leakage currents generated by electrified or non-electrified users or occurring at the gas pipeline.

[0006] In routine operation, the most common scenario for such an emergency is a point rupture in the corrugated gas supply pipe that causes a gas leak from the gas pipeline when supplying gas from the riser to the gas stove, leading to further negative consequences (explosion, fire).

[0007] Another common scenario is that an explosion may occur when a stove burner is lit with a match and an electric current leaks through the flexible gasket connecting the stove and the gas pipe or directly from the metal gas pipe (pipe) directly connected to the stove into the stove body. Utility Model Content

[0008] The solution for the ball valve that requires protection, when installed on a gas pipeline, avoids emergencies caused by leakage current at both the gas pipeline and the gas user.

[0009] The technical advantage of using the claimed utility model is that it improves the electrical strength of the ball valve and its ability to resist breakdown due to leakage current, thereby preventing emergencies at gas pipelines and gas users.

[0010] The specific technical effect is achieved by the fact that the ball valve for gas pipelines comprises a body (or valve body), a connector attached to the body, and a handle-controlled ball plug with a through hole mounted in a seat, wherein the seat is located inside the body and the connector. The body and connector are designed to have through holes and mounting areas for connection to the gas pipeline. In this case, the connector is made of glass-filled polyphenylene sulfide, and the outer portion of the connector mounting area is made of brass, which is fused together with the glass-filled polyphenylene sulfide to form an inseparable whole.

[0011] In addition to the fact that the handle is connected to the ball plug by means of a locking element and a spindle, there are seals installed between the body and the spindle and between the body and the connector. The seat is made of fluoroplastic, the connector is attached to the body by screws, and the brass parts of the mounting area of ​​the body and the mounting area of ​​the connector are threaded for connection with gas pipes. Attached Figure Description

[0012] The design is shown in the figure:

[0013] Figure 1 A ball valve in the "OPEN" position is shown in longitudinal section.

[0014] Figure 2 A ball valve is shown, illustrated in a side view.

[0015] Figure 3 The connector is shown in longitudinal section, in which

[0016] 1-Ontology

[0017] 2-Connector

[0018] 3-Ball

[0019] 4 and 5 - Seat

[0020] 6-handle

[0021] 7-Main Body Installation Area

[0022] 8-Connector Installation Area

[0023] 9-External brass portion of mounting area 8

[0024] 10-Spring-loaded locking element

[0025] 11-Mandrel

[0026] 12-Thermal shut-off valve

[0027] 13-Spring-loaded pusher

[0028] 14-Fuse insert

[0029] 15-Stop valve

[0030] 16-Spring-loaded gate

[0031] 17, 18, 19 - Seals

[0032] 20 – Screws Detailed Implementation

[0033] The ball valve comprises a body 1 having a through-hole "α", a connector 2 having a through-hole "δ" attached to the body, and a ball plug 3 having a through-hole "в". The ball plug 3 is mounted in seats 4 and 5, which are located inside the body 1 and connector 2 and are controlled by a handle 6. The body 1 and connector 2 are respectively configured to have mounting areas 7 and 8 for connection to gas pipelines.

[0034] The connector 2 is made of glass-filled polyphenylene sulfide, which has high hardness, high density and high temperature and chemical corrosion resistance.

[0035] The outer part 9 of the mounting area 8 of the connector 2 is made of brass and is connected to the glass-filled polyphenylene sulfide by melting to form an inseparable whole.

[0036] The handle 6 is connected to the ball valve 3 by means of a spring-loaded locking element 10 and a spindle 11, which can lock the handle 6 to prevent accidental opening of the ball valve.

[0037] A thermal shut-off valve 12 with a spring-loaded pusher 13 and a fusible insert 14 is installed in the through hole "α" of the body 1 to prevent the release of an explosive atmosphere in an emergency.

[0038] In the through hole "в" of the ball plug 3, a shut-off valve 15 with a spring-loaded gate 16 is installed to prevent leakage of the gas medium being transported in the event of a gas pipeline rupture.

[0039] A seal 17 is installed between the main body 1 and the spindle 11. A seal 18 is installed between the main body 1 and the connector 2. The seals 17, 18, and 19 are made in the form of rubber rings with a circular cross-section and ensure the ball valve's sealing relative to the external environment.

[0040] The brass portions of the mounting area 7 of the body 1 and the mounting area 8 of the connector 2 are threaded to connect the ball valve to the gas pipeline.

[0041] The seats 4 and 5 are made of fluoroplastic (or fluoropolymer).

[0042] Connector 2 is attached to the body using screw 20.

[0043] A comparison of the claimed technical solution with the technical state given in the scientific, technical, and patent documents on the priority date revealed no solution having all the same features as those included in the claims of the provided utility model. In other words, the set of essential features of the claimed solution was previously unknown and is not identical to any known technical solution. Therefore, it meets the patentability requirement of "novelty."

[0044] This technical solution can be applied to the industrial field; since its purpose is indicated in the specification and the name of the utility model in this application, it is manufacturable, functional, feasible and reproducible, and therefore meets the patentability requirement of "industrial applicability".

[0045] The functions of a ball valve are as follows.

[0046] The ball valve is operated through two positions of the ball plug 3:

[0047] "On" and "Off".

[0048] Figure 1 The ball valve is shown in the "open" position, where the through hole "в" of the ball plug 3 matches the through hole "α" of the body 1 and the through hole "δ" of the connector 2.

[0049] To install the ball valve in the "closed" position, rotate the handle 6 90° clockwise. The ball plug 3 rotates through the locking element 10 and the spindle 11, simultaneously covering the through hole "α" of the body 1 and the through hole "δ" of the connector 2.

[0050] Under the pressure of the working medium, the ball plug 3 is pressed against the seat 4, thereby ensuring the sealing of the ball valve.

[0051] The sealing of the internal components and parts of the ball valve, ensuring its tightness relative to the external environment, is achieved in the following manner:

[0052] On the spindle 11 - through the seal 17;

[0053] Between body 1 and connector 2 – via seals 18 and 19.

[0054] The ball valve is connected to the gas pipeline via the threaded areas 7 and 8 of the body 1 and the fitting 2.

[0055] To prevent emergencies related to accidental valve opening and leakage of explosive atmosphere in the event of pipeline damage, a thermal shut-off valve 12 is installed in the through hole "α" of the body 1, and a shut-off valve 15 is installed in the through hole "в" of the ball plug.

[0056] The device requiring protection has been tested. Based on the test results, leakage current flowing through the gas pipeline due to actual electrification by the user has been effectively avoided, i.e.:

[0057] When tested according to GOST 30345.0 standard at a voltage of 3750V (three thousand seven hundred and fifty volts), AC at a frequency of 50Hz (fifty hertz), there is no breakdown due to current, power is provided for at least 6 (six) seconds, leakage current does not exceed 0.1mA (0.1 milliamperes); and the specific resistance to DC at a voltage of 1000V (one thousand volts) is at least 5.0 MOhm (five point zero megohms).

[0058] Therefore, connector 2 automatically locks the leakage current and voltage caused by the electrified user in the gas pipeline.

[0059] The automatic voltage lockout system operates automatically without the need for special control or maintenance.

[0060] Using the claimed utility model can prevent emergencies for gas pipelines and gas users by improving the electrical strength of the ball valve and its ability to resist breakdown due to leakage current.

[0061] Furthermore, the range of tools for specific purposes is constantly expanding as alternatives to solutions known from prototypes.

Claims

1. A ball valve for a gas pipeline, the ball valve comprising a body, a connector attached to the body, and a ball plug having a through hole, the ball plug being mounted on a seat and controlled by a handle, wherein the seat is disposed within the body and the connector, and the body and the connector having a through hole and a mounting area for connection to the gas pipeline, characterized in that, The connector is made of glass-filled polyphenylene sulfide, and the outer portion of its mounting area is made of brass, which is melted and connected to the glass-filled polyphenylene sulfide to form an inseparable whole.

2. The ball valve for gas pipelines according to claim 1, characterized in that, The handle is connected to the ball plug by means of a locking element and a spindle.

3. The ball valve for gas pipelines according to claim 2, characterized in that, A seal is installed between the body and the spindle.

4. The ball valve for gas pipelines according to claim 1, characterized in that, A seal is installed between the body and the connector.

5. The ball valve for gas pipelines according to claim 1, characterized in that, The seat is made of fluoroplastic.

6. The ball valve for a gas pipeline according to claim 1, characterized in that, The connector is attached to the body using screws.

7. The ball valve for gas pipelines according to claim 1, characterized in that, Threads are cut into the brass portions of the mounting area of ​​the body and the mounting area of ​​the connector to connect the ball valve to the gas pipeline.

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