CN219159625U

CN219159625U - Automatic cut-off protection gas pipe

Info

Publication number: CN219159625U
Application number: CN202223203939.7U
Authority: CN
Inventors: 张志伟; 何瑞彬; 叶朝晖; 张礼传
Original assignee: Aerosun Corp
Current assignee: Aerosun Corp
Priority date: 2022-12-01
Filing date: 2022-12-01
Publication date: 2023-06-09
Anticipated expiration: 2032-12-01

Abstract

The utility model relates to an automatic cut-off protection gas pipe, and belongs to the technical field of gas conveying pipelines. The product comprises a corrugated flexible body, an automatic cutting-off protection device and a connecting pipe assembly, wherein the air inlet end and the air outlet end of the corrugated flexible body are respectively connected with the connecting pipe assembly; the automatic cut-off protection device consists of a shell, a sliding block, a spring and a spring retainer ring; one end in the outer ring of the shell is provided with a screen surface with screen holes, and the center of the screen surface is provided with a boss with a central hole; a sliding shaft inserted into the center hole of the boss is extended from the center of one side of the main body disk surface of the sliding block, and a spring limiting flange is extended from the periphery of the sliding shaft; the spring retainer ring is provided with a spring limiting structure, the outer circle of the annular main body of the spring retainer ring is matched with the inner diameter of the shell, and a flange clamped in the groove extends out; the spring is clamped between the sliding block and the spring retainer ring. Compared with the prior art, the automatic cut-off protection device has the advantages of simple structure, convenience in installation and capability of realizing an automatic cut-off protection function without externally connecting a voltage and current stabilizing device.

Description

Automatic cut-off protection gas pipe

Technical Field

The utility model relates to a metal hose for gas connection, in particular to an automatic cut-off protection gas pipe, and belongs to the technical field of gas conveying pipelines.

Background

The retrieval shows that in order to solve the problems of pressure fluctuation, unstable flow and the like in a gas conveying pipeline, chinese patent document with the patent number of CN202110421591.X discloses a gas pressure stabilizing device, which comprises a shell, wherein a first installation cavity for installing a primary pressure reducing mechanism and a second installation cavity for installing a secondary pressure reducing mechanism are sequentially arranged in the shell along the air inlet direction, the primary pressure reducing mechanism comprises a sliding sleeve, an installation pipe communicated with an air inlet is arranged in the first installation cavity, and one end of the sliding sleeve is sleeved between the installation pipe and the inner wall of the first installation cavity in a sliding manner; the other end of the sliding sleeve is provided with an exhaust port and a sealing gasket, the air inlet connecting pipe is communicated with the first installation cavity through the exhaust port, and the sliding sleeve axially slides to adjust the opening of the exhaust port, so that primary decompression is realized. The technical scheme is complex in structure, high in production cost, difficult to install in actual use and high in safety protection performance.

Disclosure of Invention

The utility model aims to solve the defects of the prior art, and provides the automatic cut-off protection gas pipe which is simple in structure, convenient to install, safe and reliable and is used for protecting the gas pipe through structural improvement.

In order to achieve the above purpose, the utility model discloses a basic technical scheme of automatic cutout protection gas pipe is: the corrugated flexible body comprises an air inlet end and an air outlet end which are respectively connected with the connecting pipe assembly, and an automatic cutting-off protection device connected with the air inlet end connecting pipe assembly; the automatic cutting-off protection device consists of a shell, a sliding block, a spring and a spring retainer ring;

the inner hole of the shell is provided with a groove for positioning the spring retainer ring, one end in the outer ring is provided with a screen surface with screening holes, and the center of the screen surface is provided with a boss with a center hole; a sliding shaft inserted into the central hole of the boss is extended from the center of the main body disk surface of the sliding block, and a spring limiting flange is extended from the periphery of the sliding shaft; the spring retainer ring is provided with a spring limiting structure, the outer circle of the annular main body of the spring retainer ring is matched with the inner diameter of the shell, and a flange clamped in the groove is extended; the spring is clamped between the sliding block and the spring retainer ring.

When the automatic pipeline cutting-off device works, the sliding block gradually compresses the spring along with the increase of the pressure and the flow of fluid in the pipeline, so that the circulation resistance is increased until the sliding block completely plugs the spring retainer ring, the automatic pipeline cutting-off protection function is realized, and the use safety and reliability are ensured.

The utility model is further perfected as follows: the middle part of the annular main body of the spring retainer ring extends towards one side to form a frustum with a central hole, and a spring limiting embedding recess is formed to form a spring limiting structure.

The utility model is further perfected as follows: the connecting pipe assembly comprises a connecting pipe welded with the end part of the corrugated pipe, a sealing ring nested at the outer end of the connecting pipe and a joint nut sleeved at the outer end of the connecting pipe in a buckling manner; the external threads of the housing are threaded into the union nut of the air intake nipple assembly.

The utility model is still further perfected as follows: the corrugated flexible body consists of a corrugated pipe with a flexible sleeve sleeved in the middle and protective pipes sleeved at the two ends respectively.

Compared with the prior art, the automatic cut-off protection device has the advantages of simple structure, convenience in installation and capability of realizing an automatic cut-off protection function without externally connecting a voltage and current stabilizing device.

Drawings

The automatic cut-off protection gas pipe of the present utility model is further described below with reference to the accompanying drawings:

FIG. 1 is a schematic diagram of the structure of one embodiment of the present utility model;

fig. 2 is a schematic view of the structure of the automatic cut-off protection device 3 in the embodiment of fig. 1;

FIG. 3 is a schematic view of the housing structure of FIG. 2;

FIG. 4 is a right side view of FIG. 3;

FIG. 5 is a schematic view of the slider structure of FIG. 2;

FIG. 6 is a left side view of FIG. 5;

FIG. 7 is a schematic view of the circlip structure of FIG. 2;

fig. 8 is a left side view of fig. 7.

Detailed Description

Example 1

The automatic cut-off protection gas pipe in this embodiment is composed of two connection pipe assemblies 2 respectively connected with the gas inlet end and the gas outlet end of the corrugated flexible body 1, and an automatic cut-off protection device 3 installed at the end part of the gas inlet end connection pipe assembly 2, as shown in fig. 1. The corrugated flexible body 1 consists of a flexible sleeve 1-2 sleeved in the middle part and a corrugated pipe 1-1 with two ends respectively sleeved with a protective pipe 1-3, and the connecting pipe assembly 2 comprises a connecting pipe 2-1 welded with the end part of the corrugated pipe 1-1, a sealing ring 2-2 nested at the outer end of the connecting pipe 2-1 and a joint nut 2-3 buckled at the outer end of the connecting pipe 2-1. The external thread of the automatic cut-off protection device 3 is screwed into the union nut 2-3 of the intake nipple assembly 2.

The automatic cut-off protection device 3 is shown in fig. 2 and consists of a shell 3-1, a sliding block 3-2, a spring 3-3 and a spring retainer ring 3-4.

As shown in fig. 3 and 4, the outer shell 3-1 is provided with a stepped outer ring 3-1.1 which is provided with an external thread screwed into the joint nut 2-3 of the air inlet end connecting pipe component 2, the inner hole is adjacent to one end with a large diameter and is provided with a screen surface 3-1.2 for distributing fuel gas circulation screen holes 3-1.4, and the center of the screen surface 3-1.2 is provided with a hexagonal boss 3-1.3 with a central hole, so that the installation is convenient; a groove 3-1.5 for positioning the spring retainer ring is formed in one end, adjacent to the small diameter, of the outer ring 3-1.1.

As shown in fig. 5 and 6, the sliding block 3-2 is characterized in that a sliding shaft 3-2.2 inserted into a central hole of a boss 3-1.3 of the housing 3-1 is extended from the center of one side of the main body disk surface 3-2.1, and a flange 3-2.3 larger than the outer diameter of the spring is extended from the periphery of the sliding shaft for limiting the spring.

As shown in figures 7 and 8, the outer circle of the annular main body 3-4.1 is matched with the inner diameter of the shell 3-1, and a frustum 3-4.3 with a central hole 3-4.2 and smaller than the inner diameter of the spring is extended from the outer periphery of the central hole towards one side of the annular main body 3-4.1 to form a spring limiting embedded concave 3-4.5. The outer circumference of the annular body 3-4.1 extends beyond a flange 3-4.4 which can be snapped into a recess 3-1.5 in the housing 3-1.

During assembly, the sliding shaft 3-2.2 of the sliding block 3-2 is inserted into the central hole of the boss 3-1.3 of the shell 3-1, the flange 3-4.4 of the spring retainer ring 3-4 is clamped into the groove 3-1.5 of the shell 3-1 to limit, and the spring 3-3 is clamped between the sliding block 3-2 and the spring retainer ring 3-4.

After the installation, when the fluid pressure in the pipeline is too high and the flow is too large, the sliding block is pushed to compress the spring to shift, so that the flow resistance is increased; when the pressure in the pipeline is greater than the set value, the spring is compressed to the limit, and the sliding block can completely block the central hole of the spring retainer ring, so that the automatic cutting-off protection device is blocked, and cutting-off protection is realized.

The utility model is not limited to the above embodiments, and all technical solutions formed by equivalent substitution fall within the scope of protection claimed by the utility model.

Claims

1. The utility model provides an automatic cut-off protection gas pipe, includes the ripple flexible body that inlet end and outlet end are connected with the takeover subassembly respectively, its characterized in that: the automatic cutting-off protection device is connected with the air inlet end connecting pipe assembly; the automatic cutting-off protection device consists of a shell, a sliding block, a spring and a spring retainer ring;

2. The automatic shut-off protective gas pipe according to claim 1, wherein: the middle part of the annular main body of the spring retainer ring extends towards one side to form a frustum with a central hole, and a spring limiting embedding recess is formed to form a spring limiting structure.

3. The automatic shut-off protective gas pipe according to claim 2, wherein: the connecting pipe assembly comprises a connecting pipe welded with the end part of the corrugated pipe, a sealing ring nested at the outer end of the connecting pipe and a joint nut sleeved at the outer end of the connecting pipe in a buckling manner; the external threads of the housing are threaded into the union nut of the air intake nipple assembly.

4. The automatic shut-off protective gas pipe according to claim 2, wherein: the corrugated flexible body consists of a corrugated pipe with a flexible sleeve sleeved in the middle and protective pipes sleeved at the two ends respectively.