CN220436238U

CN220436238U - Gas delivery pipeline and connection structure

Info

Publication number: CN220436238U
Application number: CN202322009974.3U
Authority: CN
Inventors: 黄亮
Original assignee: Individual
Current assignee: Individual
Priority date: 2023-07-28
Filing date: 2023-07-28
Publication date: 2024-02-02
Anticipated expiration: 2033-07-28

Abstract

The utility model relates to a gas conveying pipeline and a connecting structure, which comprises a white steel gas conveying pipe, wherein the gas inlet end of the white steel gas conveying pipe is connected with a gas control valve through a gas inlet joint, and the gas outlet end of the white steel gas conveying pipe is connected with gas combustion equipment through a gas outlet joint. The application mainly aims at the defects and problems of the plastic hose connection technology for gas transportation, which are realized by the current countries and the masses, and adopts the white steel gas transportation pipe and the continuous structure thereof to solve the problem of gas leakage, and the safety coefficient is high.

Description

Gas delivery pipeline and connection structure

Technical Field

The utility model relates to the field of gas equipment, in particular to a gas conveying pipeline for connecting a gas storage device with a gas combustion device and a connecting structure.

Background

The existing fuel gas storage device and the fuel gas combustion device are basically connected by installing a plastic hose on the fuel gas storage device. Because of the popularization of fuel gas, diversified and complicated use modes and methods, serious accidents such as severe fuel gas explosion and fire disaster and the like are continuously generated in China in recent years, and most of the accidents are caused by fuel gas leakage connected with plastic hoses.

The plastic hose has the following disadvantages: the first, plastic hose is seen to be just a pipe for connection and transport, but in practice the plastic hose needs to withstand the same pressure as the gas storage device. The plastic hoses used in the market at present are various, and when people buy the plastic hoses, the plastic hoses purchased by people and used for the gas use do not meet the gas use, and the plastic hoses are not known, namely the plastic hoses are used, so that hidden dangers are very large. Second, due to the nature of the plastic hose itself: the plastic hose has the advantages of easy aging, high temperature, low temperature, sharp object cone penetration, cutting, heavy object impact, corrosion, thin wall of the plastic hose, sand hole and the like, and is easy to cause damage to cause gas leakage. And thirdly, connecting the two ends of the plastic hose with the inlet and outlet of the gas combustion equipment and the gas storage equipment, and fastening the two ends of the plastic hose outside by using a metal clip. The metal clip can loosen due to aging, corrosion and gravity pulling, so that gas leakage is caused. Fourth, many large gas users (catering industry, commercial establishments, factories, bathing, hospitals, etc.) will concentrate a variety of gas appliances in one space or place for use. This results in a multiple connection. The multi-way connection of the plastic hoses is simply a connection method of changing the tee joint into two, two into four, four into eight (and the like). The use length of the rubber tube is prolonged, the number of connecting points is increased, and more and larger danger coefficients and hidden dangers are caused.

In summary, the plastic hose and the connection method thereof are no longer suitable as a conveying and connecting technology between the gas combustion device and the gas storage device. There is a need for a new connecting line to solve the above technical problems.

Disclosure of Invention

The utility model aims to provide a fuel gas conveying pipeline and a connecting structure, wherein the fuel gas conveying pipeline replaces the existing plastic hose for conveying fuel gas, and the safety is high.

The technical scheme of the utility model is as follows:

the gas conveying pipeline and the connecting structure comprise a white steel gas conveying pipe, wherein the gas inlet end of the white steel gas conveying pipe is connected with a gas control valve through a gas inlet joint, and the gas outlet end of the white steel gas conveying pipe is connected with gas combustion equipment through a gas outlet joint;

the gas inlet connector consists of a connector body, a clamping sleeve and a clamping sleeve nut which are integrally connected with the gas outlet end of the gas control valve, the gas inlet end of the white steel gas conveying pipe is inserted into the clamping sleeve nut, the clamping sleeve and the connector body, and the clamping sleeve nut is locked and fixed with threads of the connector body;

the gas outlet connector consists of a clamping sleeve nut, a clamping sleeve, a connector body and a locking piece, wherein the gas outlet end of the white steel gas conveying pipe is inserted into the clamping sleeve nut, the clamping sleeve and the connector body, the clamping sleeve nut is fixedly locked with the connector body, the other end of the connector body is inserted into the locking piece, a jackscrew is fixedly connected with the connector body, a gas inlet of gas combustion equipment is inserted into the connector body from the other end of the locking piece, and a metal repairing agent is injected into the locking piece to fix the connector body, the locking piece, the gas inlet of the gas combustion equipment and the jackscrew together.

The utility model has the beneficial effects that:

1. the application mainly aims at the defects and problems of the plastic hose connection technology for gas transportation, which are realized by the current countries and the masses, and adopts the white steel gas transportation pipe and the connection structure thereof to solve the problem of gas leakage, and the safety coefficient is high.

2. The cost of the white steel fuel gas conveying pipe is about three times of that of a common plastic hose. The common plastic hose used for gas transportation has to be replaced in theory for one year, and large-sized gas users have to be replaced in a few months. Since the material is 304 white steel, the material can be used for more than 10 years under high temperature (+200 DEG), low temperature (-100 DEG), high pressure and corrosive environment, and can be theoretically used for decades if the material is used as a fuel gas conveying connection. And after the common rubber tube is abandoned, the recycling value is basically low, the common rubber tube is basically burnt or discarded as garbage, no matter what treatment mode can cause environmental pollution, but the white steel tube cannot cause environmental pollution.

3. Because this application practicality is strong, the installation is easy and simple to handle, does not need extensive fund, place, equipment, personnel, and the user is extensive, better solution plastic hose connection technology as the problem that gas connection and transport technology exist.

Drawings

Fig. 1 is a schematic diagram (single-way) of a fuel gas delivery pipeline and a connection structure of the fuel gas delivery pipeline.

FIG. 2 is a schematic diagram (multiple paths) of the fuel gas delivery pipeline and the connection structure of the fuel gas delivery pipeline.

Fig. 3 is an exploded view (single pass) of the fuel gas delivery line and connection structure of the present application.

Fig. 4 is an exploded view (multiple paths) of the fuel gas delivery line and connection structure of the present application. The dotted line part of the figure represents a three-dimensional connection (any direction of up, down, left and right)

Fig. 5 is a schematic view of the split structure of the air inlet joint of the present application. (liquefied gas pressurization valve, ferrule and ferrule nut).

Fig. 6 is a schematic view of the split structure of the air inlet joint of the present application. (liquefied gas pressure reducing valve, ferrule and ferrule nut).

Fig. 7 is a schematic view of the split structure of the air inlet joint of the present application. (liquefied gas dc valve, ferrule and ferrule nut).

Fig. 8 is a schematic view of the split structure of the air inlet joint of the present application. (natural gas dc valve, ferrule and ferrule nut).

Fig. 9 is a schematic diagram of a split structure of an air outlet connector of the present application. (first configuration).

Fig. 10 is a schematic view of a split structure of an air outlet connector of the present application. (second configuration).

Fig. 11 is a schematic view of a split structure of an air outlet connector of the present application. (third structure).

Reference numerals:

white steel gas delivery pipe 1, air inlet joint 2, gas control valve 3, air outlet joint 4, joint body 5, cutting ferrule 6, cutting ferrule nut 7, retaining member 8, jackscrew 9, cutting ferrule tee 10, white steel gas delivery pipe first branch 11, right angle needle valve 12, liquefied gas pressurization valve 13, liquefied gas relief valve 14, liquefied gas direct current valve 15, natural gas direct current valve 16, gas pipe 17, rubber ring 18, hand wheel 19, screwed pipe 20.

Detailed Description

In order to solve the problems in the background technology, the utility model particularly discloses a gas conveying pipeline and a connecting structure, which are used for conveying and connecting gas between gas storage equipment (liquefied gas steel cylinders, natural gas household pipelines and the like, hereinafter the same) and various gas combustion equipment (stoves, burners and other equipment are collectively called as the same, hereinafter the same).

The existing conveying and connecting between the gas storage device and the gas combustion device are basically realized by installing a plastic hose on the gas storage device to connect the plastic hose to the gas combustion device. The gas use conditions in China have great differences due to different areas, but generally have more than 50 years of history. This also illustrates: plastic hoses have been used for more than 50 years as a means (technology) for transporting and connecting between a gas burning device and a gas storage device.

With the development of the age, the use mode of fuel gas is also greatly changed. The concrete steps are as follows:

(1) Is basically popular. With the improvement of living conditions of people, natural gas enters into thousands of families, and even in areas with immature conditions, liquefied petroleum gas is basically popularized.

(2) The use modes are diversified and complicated. The present commercial establishments such as catering industry, factories, hospitals, bath centers and residents use fuel gas to complete various purposes. The gas devices of various five-flower eight doors are caused to appear, the devices have no unified standard (including the shape, the size, the length, the thickness and the like of a gas connecting port), and more gas users need to put various gas devices in the same space or place for use (such as the situation of catering industry, dining halls of factories and the like), so that the diversification of gas use modes and the complicating of gas use methods are also caused.

In recent years, the accident frequently caused by explosion or fire disaster due to gas leakage mainly comprises four reasons of human negligence, defect of plastic hose connection, special situation, delay of protective measures and the like in terms of comprehensive large number of cases and use experience:

(1) The human negligence mainly means that a user only closes the valve of the gas combustion equipment when using the gas combustion equipment, and does not close the valve of the gas storage equipment (such as a liquefied gas cylinder valve, a natural gas inlet pipeline valve and the like). In the case of an open gas storage device valve and a closed gas combustion device valve, the plastic hose and its connection are forced to change from a gas transportation and connection function to a part of the gas storage device, namely: the plastic hose and its connection must withstand the same pressure as the liquefied gas cylinder and natural gas pipeline.

(2) The disadvantages of plastic hoses include the following:

(1) expected to be inconsistent with reality. Plastic hoses and their connection are not very fragile in the human impression and are not essential but are only a small means of connection and transport. However, under the condition that the valve of the gas storage device is opened and the valve of the gas combustion device is closed, as the pressure is not released, the plastic hose has to bear the same pressure as the gas storage device, and the plastic hose also becomes the biggest soft rib and hidden trouble between the gas combustion device and the gas storage device.

(2) Plastic hoses as accessories for gas systems have no quality standard:

the existing plastic hose sold in the market has five flowers and eight doors, and has thick wall thickness, material, thick inner diameter and long aging time, and has no mention of what purpose. If the plastic hose purchased by a person or a merchant for the gas application does not meet the gas application, the plastic hose is not known and used, and the hidden trouble is very large.

(3) Plastic hoses are not suitable for use as fuel gas systems per se:

due to the characteristics of the plastic hose itself: the plastic hose has the advantages of easy aging, high temperature, low temperature, sharp object cone penetration, cutting, heavy object impact, corrosion, thin wall of the plastic hose, sand hole and the like, and is easy to cause damage to cause gas leakage.

(4) Disadvantages of plastic hose connection:

the plastic hose connection is to connect two ends of the plastic hose together with the gas storage device and the gas burning device, and fasten the two ends of the plastic hose outside by using a metal clip. The metal clip can loosen due to aging, corrosion and gravity pulling, so that gas leakage is caused.

(5) Multiplex connection:

many large gas users (catering industry, merchants, factories, bathing, hospitals, etc.) will concentrate a variety of gas appliances in one space or place for use. This results in a multiple connection. The multi-way connection of the plastic hoses is simply a connection method of changing the tee joint into two, two into four, four into eight (and the like). The use length of the rubber tube is prolonged, the number of connecting points is increased, and more and larger danger coefficients and hidden dangers are caused.

(3) Special cases:

certain special conditions may occur during the use of the gas, such as: the pressure of civil natural gas pipeline (municipal pipe network) is 0.05 MPa-0.04 MPa, the gas pressure regulated to 2 KPa-3 KPa is fed into the pipeline (natural gas inlet pipeline) before the kitchen range, and the rated outlet pressure of natural gas kitchen range is 2KPa. Once the pressure regulator fails or other causes a gas pressure of 0.05-0.04 MPa to enter the forehearth pipe, no matter whether the valve of the gas combustion device is opened or not, the plastic hose and the connecting part thereof are instantaneously burst or disconnected, and the gas leakage under the pressure can lead a space or site with 100-200 flat to reach deflagration concentration in tens of seconds. (failure of the pressure regulating valve of the liquefied gas cylinder would have the same effect, which is the cause of some serious gas accidents).

(4) The protective measures are delayed:

the existing gas leakage protection measures mainly comprise a gas alarm and a blocking valve. The working principle is that after the alarm detects that the gas leakage concentration exceeds the standard, the blocking valve is opened and the alarm is given out, and the alarm has the following defects: (1) the gas alarm must be operated by nearby persons, and if no person is nearby, the gas can leak to deflagrable concentration within a few minutes. (2) The blocking valve is not sensitive in practical use. (3) Since the gas alarm can only be detected at a certain point and is to be installed at a distance of about 50 cm from the ground, that is to say, the alarm can only alarm when the gas is in a position below half a meter in the whole space. (4) An alarm with a blocking valve is not usable in ordinary households because it cannot be installed on the burner pipe.

The present application is described in detail below with reference to the attached drawing figures:

as shown in fig. 1 and 3, a gas delivery pipeline and a connection structure comprise a white steel gas delivery pipe 1, wherein the gas inlet end of the white steel gas delivery pipe is connected with a gas control valve 3 through a gas inlet joint 2, and the gas outlet end of the white steel gas delivery pipe 1 is connected with gas combustion equipment through a gas outlet joint 4. The gas inlet connector 2 is composed of a connector body 5, a clamping sleeve 6 and a clamping sleeve nut 7 which are integrally connected with the gas outlet end of the gas control valve, the gas inlet end of the white steel gas conveying pipe 1 is inserted into the clamping sleeve nut 7, the clamping sleeve 6 and the connector body 5, the clamping sleeve nut 7 is locked with the connector body 5, and the white steel gas conveying pipe 1 is cut into for sealing by utilizing the clamping sleeve nut to lock and abut against the clamping sleeve.

The gas outlet connector 4 is composed of a clamping sleeve nut 7, a clamping sleeve 6, a connector body 5 and a locking piece 8, the gas outlet end of the white steel gas conveying pipe 1 is inserted into the clamping sleeve nut 7, the clamping sleeve 6 and the connector body, the clamping sleeve nut 7 is fixedly connected with the connector body 5 in a locking manner, the other end of the connector body 5 is inserted into the locking piece 8, a gas inlet of gas combustion equipment is inserted into the other end of the locking piece, a jackscrew 9 is fixedly connected with the locking piece 8 and the gas inlet of the gas combustion equipment, and a metal repairing agent is injected into the locking piece 8 to fix the locking piece, the connector body, the gas inlet of the gas combustion equipment and the jackscrew together.

As shown in fig. 9-11, the locking member 8 is provided with an internal threaded through hole, the periphery of the locking member can be hexagonal or cylindrical, the aperture of the end, far away from the connector body, of the locking member is smaller than that of the internal threaded through hole, and a screw hole is formed in the side wall of the locking member. The shape of the locking piece is made into various conditions, and the locking piece is determined according to the shapes around the air inlets of different gas combustion equipment in the market. When the gas outlet connector is used, the locking piece is used for locking the gas inlet of the gas combustion equipment, and then the metal repairing agent (national standard) is filled. And secondly, locking and fixing the air inlet of the gas combustion equipment with the locking piece by using a jackscrew. Thirdly, the connector body is inserted into the connector of the locking piece, the threads are screwed to pressurize and compress the metal repairing agent, the density and strength of the metal repairing agent are increased, and after solidification, the locking piece, the connector body, the air inlet of the gas combustion device and the jackscrew are fixed together to form a metal whole.

By the figure 2, 4 show, this application multichannel, three-dimensional connected mode, white steel gas conveyer pipe 1 is a plurality of, connects through cutting ferrule tee bend 10 between a plurality of white steel gas conveyer pipes, and air inlet connection 2 is connected to the one end of a plurality of white steel gas conveyer pipes 1, and the other end is connected and is given vent to anger and connect 4, and cutting ferrule tee bend 10 third end is connected white steel gas conveyer pipe first branch road 11, and white steel gas conveyer pipe first branch road 11 end-to-end connection cutting ferrule tee bend 10 or is connected right angle needle valve 12 or is given vent to anger and is connected 4.

In order to meet the requirements of multiple paths and three-dimensional connection modes of users, the clamping sleeve type tee joint is used for connecting a plurality of white steel gas conveying pipes together to prolong pipelines. The first branch of the white steel gas conveying pipe can be directly connected with an air outlet connector through a cutting sleeve type tee joint, and the air outlet connector is connected with gas combustion equipment; the first branch of the white steel gas conveying pipe can also be connected with a right-angle needle valve, and the right-angle needle valve can change the direction of the pipeline and then continuously connect the pipeline according to the requirement; the first branch of the white steel gas conveying pipe can be connected with a cutting sleeve type tee joint, the pipeline is divided into two branches through the cutting sleeve type tee joint, and then the two branches are continuously connected according to requirements. In this way, multiple paths of connection in a three-dimensional mode can be performed according to the requirements of users.

As shown in fig. 1-4 and 6-9, the gas control valve 3 of the present application may be a control valve connected to a liquefied gas cylinder on the market, or a control valve on a natural gas pipeline.

The relatively common gas control valves 3 include a liquefied gas pressurizing valve 13, a liquefied gas depressurizing valve 14, a liquefied gas straight flow valve 15, and a natural gas straight flow valve 16. In the actual production process, structures of a liquefied gas pressurizing valve, a liquefied gas pressure reducing valve, a liquefied gas direct current valve and a natural gas direct current valve which are used in the market are unchanged, and the shape of the connector is manufactured on the air outlet.

One of the liquefied gas direct-current valves is shown in fig. 7, the liquefied gas direct-current valve 15 comprises a gas pipe 17, the gas pipe inlet end is fixedly connected with a rubber ring 18, a hand wheel 19 is embedded and connected on the gas pipe, a threaded pipe 20 is arranged on the surface of the hand wheel, facing to one end of the rubber ring, of the hand wheel, the gas pipe outlet end is fixedly connected with a connector body 3, and the connector body is connected with the white steel gas conveying pipe 1.

Due to the development of the times, the popularization of the fuel gas users and the diversification and complexity of the fuel gas use modes and methods, the plastic hose and the connection technology thereof are no longer suitable for the development of things. The plastic hose connection technology has a plurality of defects, but the general summary is that: it is the best breakthrough point of gas leakage caused by various reasons-! In order to solve the disadvantages of the plastic hose connection technology. The application develops a white steel fuel gas conveying and connecting structure aiming at the defects of the plastic hose and the connecting technology thereof. The technology aims to solve the problem of gas leakage in conveying and connecting between the gas combustion equipment and the gas storage equipment.

In order to solve the problems of the plastic hose connection technology, the application adopts the following technology and method:

(1) The material is replaced by the material,

due to the material characteristics of the plastic hose, the plastic hose is unqualified as a conveying and connecting material between the gas combustion equipment and the gas storage equipment. The material used in the application is 304 industrial (food grade) white steel material, the 304 white steel pipe is the best industrial conveying pipe currently acknowledged, and the plastic hose has the characteristics of high temperature resistance, high pressure resistance, corrosion resistance, high toughness, high strength and the like, and solves the defects that various types of plastic hoses are easy to age, high temperature, low temperature, sharp object cone thorn, cutting, heavy object impact, corrosion, thin wall of the plastic hose, sand hole and the like, and easy to cause gas leakage. The use of the 304 white steel pipe not only overcomes the defects of the plastic hose, but also inherits the advantages of the plastic hose (the pipe diameter is thin, the space is not occupied, the pipe can be bent and connected at will, and the pipe is led to any direction).

(2) The change of the way of connection is performed,

the plastic hose connection is to insert the interface of the gas burning device or gas storage device into the plastic hose and fasten the interface with the clip or wire outside, and this connection has many disadvantages, as two examples: (1) the caliber of two ends of a plastic hose is the same, and if the sizes (the length, the thickness and the thickness) of connecting ports of two connected devices (one end is a gas combustion device and the other end is a gas storage device) are different, the connection of one end is definitely unstable. (2) The hose in normal use is placed on the ground, and if people are in a more densely-spaced place (a factory dining room and a restaurant kitchen), people or objects often scratch and pull the hose, so that the connecting part is loosened.

The utility model discloses an use air inlet connector (screw pressurization cutting ferrule formula metal coupling) and air outlet connector (spiral sticis special-shaped pipe coupling promptly) with white steel gas conveyer pipe and gas control valve and gas combustion equipment, use screw pressurization cutting ferrule formula metal coupling, make entire system become a whole, its bearing capacity can compare favorably with gas storage equipment, and anti-corrosion and toughness are even more superior. The problem of the plastic hose exist between gas combustion equipment and gas storage equipment is solved.

3. Multiple connection

Many large gas users (catering industry, merchants, factories, bathing, hospitals, etc.) will concentrate a variety of gas appliances in one space or place for use. This results in a multiple connection. The system aims at the problem of multi-path connection, besides innovation of materials and connection methods, various connection modes are developed, and the mode can be used for three-dimensional connection (up, down, left, right and any directions) and ensures the overall safety guarantee of multi-path connection. Solves the problem that the plastic hose is connected on multiple paths of connections.

The utility model and its embodiments have been described above by way of illustration and not limitation, and the utility model is illustrated in the accompanying drawings and described in the drawings in which the actual structure is not limited thereto. Therefore, if one of ordinary skill in the art is informed by this disclosure, the technical matter according to the present utility model does not creatively design and implement similar structural ways and implementations to the above implementation examples, which are all included in the protection scope of the present utility model.

Claims

1. A gas transfer line and connection structure, its characterized in that: the gas-fired boiler comprises a white steel gas conveying pipe, wherein the gas inlet end of the white steel gas conveying pipe is connected with a gas control valve through a gas inlet joint, and the gas outlet end of the white steel gas conveying pipe is connected with gas combustion equipment through a gas outlet joint;

the gas outlet connector consists of a clamping sleeve nut, a clamping sleeve, a connector body and a locking piece, wherein the gas outlet end of the white steel gas conveying pipe is inserted into the clamping sleeve nut, the clamping sleeve and the connector body, the clamping sleeve nut is fixedly locked with the connector body, the other end of the connector body is inserted into the locking piece, the gas inlet of the gas combustion equipment is inserted into the connector body from the other end of the locking piece, the locking piece is fixedly connected with the gas inlet of the gas combustion equipment by a jackscrew, and a metal repairing agent is injected into the locking piece to fix the connector body, the locking piece, the gas inlet of the gas combustion equipment and the jackscrew together.

2. The gas delivery line and connection structure according to claim 1, wherein: the locking piece is provided with an internal thread through hole, the periphery of the locking piece can be hexagonal or cylindrical, the aperture of one end of the locking piece far away from the connector body is smaller than the aperture of the internal thread through hole, and a screw hole is formed in the side wall of the locking piece.

3. The gas delivery line and connection structure according to claim 1, wherein: the white steel gas conveying pipes are multiple, the white steel gas conveying pipes are connected through a cutting sleeve type tee joint, one ends of the white steel gas conveying pipes are connected with an air inlet joint, the other ends of the white steel gas conveying pipes are connected with an air outlet joint, the third ends of the cutting sleeve type tee joint are connected with a first branch of the white steel gas conveying pipe, and the tail ends of the first branch of the white steel gas conveying pipe are connected with a cutting sleeve type tee joint, a right-angle needle valve or an air outlet joint.

4. The gas delivery line and connection structure according to claim 1, wherein: the gas control valve comprises a liquefied gas pressurizing valve, a liquefied gas reducing valve, a liquefied gas direct-current valve and a natural gas direct-current valve.

5. The fuel gas delivery line and connection structure according to claim 4, wherein: the liquefied gas direct-current valve comprises a gas pipe, the gas inlet end of the gas pipe is fixedly connected with a rubber ring, a hand wheel is connected to the gas pipe in an embedded mode, a threaded pipe is arranged on the hand wheel towards one end surface of the rubber ring, and the gas outlet end of the gas pipe is integrally connected with a connector body.

6. A gas delivery line and connection according to claim 1 or 3, characterized in that: the white steel gas conveying pipe and the first branch of the white steel gas conveying pipe are 304 stainless steel white steel pipes.