Flame arrester

Abstract

The utility model provides a flame arrester which comprises a first flame arrester valve body used for arresting fire and a second flame arrester valve body connected with the first flame arrester valve body through a connecting flange, an annular plate is arranged in the second flame arrester valve body, the annular plate comprises an outer plate and an inner annular plate partially arranged in the outer plate, and a circulation channel is formed in the inner annular plate. An anti-impact plate is arranged in the circulation channel, the side portion of the anti-impact plate is connected with two vertically-arranged first connecting plates, the top end of the outer plate is connected with the side wall of the inner ring plate through a fixing plate, the bottom end of the outer plate is connected with the bottom ends of the first connecting plates through second connecting plates, and one or more reverse flow holes are formed in the connecting positions. And the connecting flange is arranged above the outer plate and the circulating channel. According to the flame arrester, silt can be prevented from being collected in the flame arrester, so that an airflow channel is prevented from being blocked, and the flame arresting efficiency is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of natural gas ground gathering and transportation, and in particular relates to a flame arrester. Background Art

[0002] The function of pipeline flame arrester (also known as "fire arrester") is to prevent external flames from entering pipelines containing flammable and explosive gases or to prevent flames from spreading between pipelines. Pipeline flame arrester mainly consists of two parts: shell and filter element (also known as fire arrester plate), among which the filter element is the main component to prevent the spread of flames. When the flame passes through the filter element, it will be cut into several small flames by the filter element, which will expand the contact area between the flame and the channel wall and strengthen the heat transfer, so that the flame temperature drops below the ignition point, thereby preventing the flame from spreading.

[0003] Since the natural gas medium is often mixed with solid-liquid impurities, after entering the existing flame arrester, it often causes siltation inside the flame arrester and blocks the air flow channel, resulting in reduced flame arresting efficiency. Utility Model Content

[0004] One purpose of the utility model is to provide a flame arrester to prevent sludge from forming inside the flame arrester, thereby preventing the air flow channel from being blocked and improving the flame arresting efficiency.

[0005] According to the utility model, a flame arrester is provided, comprising a first flame arrester valve body for preventing fire and a second flame arrester valve body connected to the first flame arrester valve body by a connecting flange, an annular plate is arranged inside the second flame arrester valve body, the annular plate comprises an outer plate and an inner ring plate partially arranged inside the outer plate, a circulation channel is formed inside the inner ring plate, and an anti-impact plate is arranged inside the circulation channel, two vertically arranged first connecting plates are connected to the side of the anti-impact plate, the top end of the outer plate is connected to the side wall of the inner ring plate by a fixing plate, the bottom end of the outer plate is connected to the bottom end of the first connecting plate by a second connecting plate, and one or more counterflow holes are opened at the connection, and the connecting flange is arranged above the outer plate and the circulation channel.

[0006] In a preferred embodiment, the impact plate is perpendicular to the axis of the inner cylinder.

[0007] In a preferred embodiment, the impact protection plate is configured in a circular shape.

[0008] In a preferred embodiment, one or more flame arrester plates are arranged inside the first flame arrester valve body.

[0009] In a preferred embodiment, the fire-blocking panels are stacked.

[0010] In a preferred embodiment, the fire arrester plate is fixed in the first flame arrester valve body through a fire arrester plate flange arranged on the side of the first flame arrester valve body.

[0011] In a preferred embodiment, an upper end flange is provided on the top of the first flame arrester valve body.

[0012] In a preferred embodiment, the top end of the inner ring plate is fixedly disposed on the top inner wall of the second flame arrester valve body.

[0013] In a preferred embodiment, a discharge port is formed on the bottom side wall of the second flame arrester valve body.

[0014] In a preferred embodiment, a lower end flange is connected to the center of the bottom of the second flame arrester valve body.

[0015] The utility model has at least the following technical effects:

[0016] According to the utility model, a first flame arrester valve body for preventing fire and a second flame arrester valve body connected to the first flame arrester valve body through a connecting flange are provided. Since an annular plate is arranged inside the second flame arrester valve body, and the annular plate includes an outer plate and an inner ring plate partially arranged inside the outer plate, a flow channel is formed inside the inner ring plate, and an anti-impact plate is arranged inside the flow channel, the fluid medium enters the second flame arrester valve body and flows to the anti-impact plate through the flow channel to reduce the flow rate for the first time and settle the solid and liquid impurities therein. Furthermore, since the side of the impact-proof plate is connected to two vertically arranged first connecting plates, the top end of the outer plate is connected to the side wall of the inner ring plate through a fixed plate, and the bottom end of the outer plate is connected to the bottom end of the first connecting plate through a second connecting plate, and one or more counterflow holes are opened at the connection, and a connecting flange is arranged above the outer plate and the flow channel. After the medium continues to flow to the connecting flange, the flow rate can be reduced for a second time, and the liquid therein can be precipitated. Part of the liquid flows down through the counterflow holes, and the precipitated solid and liquid impurities are discharged through the discharge port, so as to avoid the formation of sludge inside the flame arrester, thereby avoiding blockage of the air flow channel and improving the fire-blocking efficiency.

[0017] According to the utility model, the fire arrester plate is fixed in the first flame arrester valve body by a fire arrester plate flange arranged on the side of the first flame arrester valve body. When the flame arrester fails, the fire arrester plate flange is opened and the fire arrester plate is taken out for inspection and maintenance, thereby reducing maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 The overall structural diagram of a flame arrester according to an embodiment of the utility model is schematically shown.

[0019] In the present application, all drawings are schematic drawings, which are only used to illustrate the principles of the present utility model and are not drawn according to the actual scale. DETAILED DESCRIPTION

[0020] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] In the present invention, unless otherwise clearly specified and limited, the term "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0022] like Figure 1 As shown, the flame arrester 100 described in the utility model includes a first flame arrester valve body 2 for flame arresting and a second flame arrester valve body 4 connected to the first flame arrester valve body 2, the first flame arrester valve body 2 is arranged above the second flame arrester valve body 4, and the first flame arrester valve body 2 and the second flame arrester valve body 4 are connected through a connecting flange 3, and the connecting flange 3 is arranged in the second flame arrester valve body 4. During the venting process, the medium enters the second flame arrester valve body 4 from the lower end of the second flame arrester valve body 4, and flows upward through the connecting flange 3 to enter the first flame arrester valve body 2.

[0023] An annular plate 11 is arranged inside the second flame arrester valve body 4, and the annular plate 111 includes an outer plate 111 and an inner ring plate 112 partially arranged inside the outer plate 111. The connecting flange 3 is arranged above the outer plate 111, and a channel is formed between the outer plate 111 and the inner wall of the second flame arrester valve body 4, and a channel is formed between the outer plate 111 and the inner ring plate 112. The inner ring plate 112 is configured to be circular, and a flow channel is formed therein, and an anti-impact plate 6 is arranged inside the flow channel, and the anti-impact plate 6 is perpendicular to the axis of the inner cylinder. Optionally, the anti-impact plate 6 is configured to be a circular or square plate. Two vertically arranged first connecting plates are connected to the side of the anti-impact plate 6, and the first connecting plate extends vertically downward to the bottom of the inner ring plate 112, and a channel is formed between the first connecting plate and the inner ring plate 112, and a channel is formed between the two first connecting plates, and the connecting flange 3 is located above each channel. The anti-impact plate 6 is used to withstand the main impact force of the natural gas medium to reduce its flow rate and settle the solid and liquid impurities therein. The top of the outer plate 111 is connected to the side wall of the inner ring plate 112 through a fixing plate 10. The fixing plate 10 is constructed as a circular plate with a circular through hole in the middle, and the circular through hole is used for flow. The bottom end of the outer plate 111 is connected to the bottom end of the first connecting plate through a second connecting plate, and one or more counterflow holes 13 are opened at the connection. After the fluid medium impacts the impact plate 6, the flow rate is reduced and the solid and liquid impurities therein are settled, and after passing through the connecting flange 3, the flow rate is reduced again and the liquid therein is settled, so that the liquid falls and flows down through the counterflow hole 12.

[0024] One or more fire arrester plates 8 are arranged inside the first flame arrester valve body 2, and each fire arrester plate 8 is stacked. The fire arrester plate 8 is used to change the air flow channel and prevent backfire. The fire arrester plate 8 is fixed in the first flame arrester valve body 2 through a fire arrester plate flange 7 arranged on the side of the first flame arrester valve body 2.

[0025] According to the utility model, the fire arrester plate 8 is fixed in the first flame arrester valve body 2 by the fire arrester plate flange 7 arranged on the side of the first flame arrester valve body 2. When the flame arrester 100 fails, the fire arrester plate flange 7 is opened and the fire arrester plate 8 is taken out for inspection and maintenance, thereby reducing maintenance costs.

[0026] In one or more embodiments, an upper end flange 1 is disposed on the top of the first flame arrester valve body 2. The fluid medium is discharged through the upper end flange 1 after passing through the flame arrester plate 8.

[0027] In one or more embodiments, the inner ring plate 112 passes through the connecting flange 3 , and a top end thereof is fixedly disposed on the top inner wall of the second flame arrester valve body 4 .

[0028] In one or more embodiments, a discharge port 13 is provided on the bottom side wall of the second flame arrester valve body 4 , and solid and liquid impurities precipitated from the fluid medium are discharged to a solid and liquid impurity collecting device (not shown) through the discharge port 13 .

[0029] In one or more embodiments, a lower end flange 5 is connected to the center of the bottom of the second flame arrester valve body 4 .

[0030] The working process of the flame arrester 100 described in the utility model is described in detail below. Figure 1 The arrows in the figure schematically indicate the flow path of part of the fluid medium.

[0031] During the venting process, the fluid medium enters the second flame arrester valve body 4 through the lower flange 5, and flows to the impact plate 6 through the channel formed between the two first connecting plates to reduce the flow rate for the first time and settle the solid and liquid impurities therein. After returning in the channel between the two first connecting plates, the fluid medium flows to the connecting flange 3 to reduce the flow rate for the second time, and then enters the channel formed between the outer plate 111 and the inner ring plate 112 and settles the liquid in the fluid medium. Part of the liquid flows down through the countercurrent hole 12, and the settled solid and liquid impurities are discharged through the discharge port 13. Subsequently, the fluid medium enters the channel between the inner ring plate 112 and the first connecting plate, and after passing through the connecting flange 3, enters the first flame arrester valve body 2. Since the flame arrester plate 8 in the first flame arrester valve body 2 is composed of many small channels or pores, the fluid medium settles the liquid for the third time under the action of resistance and gravity. Finally, the fluid medium leaves the flame arrester plate 8 and is discharged through the upper flange 1.

[0032] Although the present invention has been described with reference to preferred embodiments, various modifications may be made thereto and parts thereof may be replaced with equivalents without departing from the scope of the present invention. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there is no structural conflict. The present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A flame arrester, characterized in that: It comprises a first flame arrester valve body for preventing fire and a second flame arrester valve body connected to the first flame arrester valve body through a connecting flange, An annular plate is arranged inside the second flame arrester valve body, and the annular plate includes an outer plate and an inner ring plate partially arranged inside the outer plate, a circulation channel is formed inside the inner ring plate, and an anti-impact plate is arranged inside the circulation channel, and two vertically arranged first connecting plates are connected to the side of the anti-impact plate, the top end of the outer plate is connected to the side wall of the inner ring plate through a fixing plate, the bottom end of the outer plate is connected to the bottom end of the first connecting plate through a second connecting plate, and one or more counterflow holes are opened at the connection, and the connecting flange is arranged above the outer plate and the circulation channel.

2. The flame arrester according to claim 1, characterized in that: The impact-proof plate is perpendicular to the axis of the inner cylinder.

3. The flame arrester according to claim 1, characterized in that: The impact plate is configured in a circular or square shape.

4. The flame arrester according to claim 1, characterized in that: One or more flame arrester plates are arranged inside the first flame arrester valve body.

5. The flame arrester according to claim 4, characterized in that: The fire-blocking panels are stacked.

6. The flame arrester according to claim 5, characterized in that: The fire arrester plate is fixed in the first flame arrester valve body through a fire arrester plate flange arranged on the side of the first flame arrester valve body.

7. The flame arrester according to claim 1, characterized in that: An upper end flange is arranged on the top of the first flame arrester valve body.

8. The flame arrester according to claim 1, characterized in that: The top end of the inner ring plate is fixedly arranged on the top inner wall of the second flame arrester valve body.

9. The flame arrester according to claim 1, characterized in that: A discharge port is formed on the bottom side wall of the second flame arrester valve body.

10. The flame arrester according to claim 1, characterized in that A lower end flange is connected to the center of the bottom of the second flame arrester valve body.

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