An acetylene line low point drain apparatus

Abstract

The utility model relates to an acetylene pipeline low point drainage equipment belongs to chemical production equipment technical field. Include: tee pipeline, liquid accumulation bag, drainage pipeline and explosion -proof water seal jar, the first end and the second end of tee pipeline one -to -one correspondence with the both ends intercommunication of acetylene delivery pipeline low point, the top of liquid accumulation bag with the third end intercommunication of tee pipeline, one end of drainage pipeline with the bottom of liquid accumulation bag intercommunication, its other end with explosion -proof water seal jar intercommunication. The utility model is favorable to the liquid water of acetylene delivery pipeline low point accumulation from tee pipeline third end diversion to liquid accumulation bag in, and along drainage pipeline flow to explosion -proof water seal jar in storage, avoid large -scale reconstruction pipe gallery structure, and high safety performance, low cost and short construction period, solved the problem that liquid water accumulated blocked pipeline, reduced the pressure of acetylene pipe network, avoided the influence to the normal operation of downstream device.

Description

Technical Field

[0001] This utility model relates to the field of chemical production equipment technology, and in particular to a low-point drainage device for acetylene pipelines. Background Technology

[0002] Acetylene is a common raw material in chemical production processes. Acetylene gas is often transported to various production units via pipelines. Acetylene gas contains water vapor, which condenses into liquid water during transport and accumulates as the acetylene gas moves through the pipeline. Particularly in the uphill sections of acetylene pipelines, the steep slope design in current technology results in insufficient gas flow velocity, causing liquid water to accumulate at the lowest points of the pipeline. This water cannot be carried away by the acetylene gas flow, leading to pipe blockage, reduced acetylene network pressure, and disruption of downstream unit operation.

[0003] Traditional solutions include: 1) adjusting the pipeline slope. This method requires large-scale modifications to the pipeline structure, resulting in high costs and long construction periods; 2) increasing the gas flow rate. This method may increase energy consumption and pose safety hazards (such as the risk of acetylene explosion); 3) manual inspection and drainage. This method is inefficient and cannot completely solve the problem. Therefore, a low-cost, efficient, and safe solution is urgently needed to eliminate the impact of pipeline water accumulation on acetylene delivery pressure. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a low-point drainage device for acetylene pipelines to solve the above-mentioned problem.

[0005] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: A low-point drainage device for acetylene pipelines includes: a three-way pipe, a liquid collection bag, a drainage pipe, and an explosion-proof water seal tank. The first and second ends of the three-way pipe are connected to the two ends of the low point of the acetylene delivery pipeline, the top end of the liquid collection bag is connected to the third end of the three-way pipe, one end of the drainage pipe is connected to the bottom end of the liquid collection bag, and the other end is connected to the explosion-proof water seal tank.

[0006] The beneficial effects of this utility model are as follows: the first and second ends of the three-way pipe are connected one-to-one with the two ends of the low point of the acetylene transmission pipeline, which is conducive to guiding the liquid water accumulated at the low point of the acetylene transmission pipeline from the third end of the three-way pipe to the liquid accumulation bag, and then flowing along the drainage pipe to the explosion-proof water seal tank for storage. This avoids large-scale modification of the pipe gallery structure, has high safety performance, low cost and short construction period, solves the problem of liquid water accumulation blocking the pipeline, reduces the pressure of the acetylene pipeline network, and avoids affecting the normal operation of downstream devices.

[0007] Based on the above technical solution, the present invention can be further improved as follows.

[0008] Furthermore, it also includes a drainage control mechanism, which includes a level transmitter, a controller, and a flow regulating valve. The level transmitter is fixed on the inner wall of the liquid accumulation bag, and the flow regulating valve is fixed on the drainage pipe. Both the level transmitter and the flow regulating valve are electrically connected to the controller.

[0009] The beneficial effects of adopting the above-mentioned further solution are: the level transmitter is conducive to setting the safe threshold of the liquid level inside the liquid collection bag. If the liquid water inside the liquid collection bag rises to the height of the level transmitter, it indicates that the liquid needs to be drained. After receiving the signal, the controller controls the flow regulating valve to open, so that the liquid water accumulated inside the liquid collection bag enters the explosion-proof water seal tank through the drainage pipe for storage, thus avoiding excessive accumulation of liquid water and blockage of the acetylene delivery pipeline.

[0010] Furthermore, it also includes a bypass mechanism, which includes: a bypass pipe, a first bypass valve and two second bypass valves. The first bypass valve is fixed on the bypass pipe, and both ends of the bypass pipe are connected to the drainage pipes at both ends of the flow regulating valve. The second bypass valve is fixed on the drainage pipe, and the two second bypass valves are fixed between the ends of the flow regulating valve and the corresponding ends of the bypass pipe.

[0011] The beneficial effects of adopting the above-mentioned further scheme are: when the first bypass valve is open and the second bypass valve is closed, it is conducive to realizing the bypass function, so as to manually realize drainage when the drainage control mechanism fails; when the first bypass valve is closed and the second bypass valve is open, it is conducive to closing the bypass function, so as to realize the automatic discharge of water accumulated at the low point of the acetylene delivery pipeline under the control of the drainage control mechanism.

[0012] Furthermore, a magnetic float level gauge for viewing the liquid level inside the liquid collection bag is fixed on the outer wall of the collection bag.

[0013] The beneficial effect of adopting the above-mentioned further solution is that the magnetic float level gauge is helpful for providing staff with information on the liquid level inside the liquid collection tank during on-site work or maintenance.

[0014] Furthermore, a first inspection valve is fixedly installed on the drainage pipe, and the first inspection valve is located near the liquid accumulation bag.

[0015] The beneficial effects of adopting the above-mentioned further solution are: the first inspection valve is conducive to controlling the opening and closing of the liquid collection tank and the drainage pipe, thereby disconnecting the liquid collection tank from the drainage pipe during maintenance work, which facilitates the maintenance of the drainage pipe and the bypass mechanism.

[0016] Furthermore, a second inspection valve is fixedly installed on the drainage pipe, and the second inspection valve is located near the explosion-proof water seal tank.

[0017] The beneficial effects of adopting the above-mentioned further solution are: the second inspection valve is conducive to controlling the opening and closing of the explosion-proof water seal tank and the drainage pipe, thereby disconnecting the explosion-proof water seal tank from the drainage pipe during maintenance work, which facilitates the maintenance of the explosion-proof water seal tank.

[0018] Furthermore, multiple purge and displacement valves are fixedly installed on the drainage pipe.

[0019] The beneficial effects of adopting the above-mentioned further solution are: the purging and replacement valve is conducive to disconnecting the connection between the drainage pipe and the liquid accumulation bag and the explosion-proof water seal tank in conjunction with the first and second maintenance valves during maintenance operations, thereby purging and cleaning the drainage pipe, or replacing the liquid acetylene mixed in the explosion-proof water seal tank, avoiding the waste of chemical raw materials and avoiding pollution caused by directly discharging the liquid in the explosion-proof water seal tank.

[0020] Furthermore, the three-way pipe includes a first connecting pipe and a second connecting pipe. The two ends of the first connecting pipe are connected to the two ends of the lowest point of the acetylene delivery pipeline. One end of the second connecting pipe is connected to the side wall of the first connecting pipe, and the other end is connected to the top of the liquid collection bag. The first connecting pipe is a straight pipe or a V-shaped pipe.

[0021] The beneficial effect of adopting the above-mentioned further solution is that one end of the second connecting pipe is connected to the side wall of the first connecting pipe, which is conducive to forming a three-way pipe, thereby connecting the pipe at the low point of the acetylene pipeline with the liquid accumulation bag, and thus realizing the drainage of the water accumulated at the low point of the acetylene pipeline.

[0022] Furthermore, the first connecting pipe is a V-shaped pipe, and one end of the second connecting pipe is connected to the side wall of the lowest point of the first connecting pipe.

[0023] The beneficial effects of adopting the above-mentioned further solution are: the first connecting pipe is a V-shaped pipe, which is conducive to guiding the water accumulated at the low point of the acetylene pipeline downward and into the liquid collection bag through the second connecting pipe, thus avoiding the accumulation of water in the first connecting pipe.

[0024] Furthermore, the explosion-proof water seal tank is an atmospheric pressure closed water seal tank, and the other end of the drainage pipe is connected to the water inlet of the explosion-proof water seal tank through a flange.

[0025] The beneficial effects of adopting the above-mentioned further solutions are: the atmospheric pressure sealed water seal tank helps to reduce the safety hazards of high pressure explosion, and the flange connection helps to ensure the sealing between the drainage pipe and the water inlet of the explosion-proof water seal tank when connected. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure provided for an embodiment of the present utility model.

[0027] The attached diagram lists the components represented by each number as follows: 1. Three-way pipe; 2. Liquid collection tank; 3. Drainage pipe; 4. Explosion-proof water seal tank; 5. Bypass mechanism; 6. Drainage control mechanism; 11. First connecting pipe; 12. Second connecting pipe; 21. Magnetic float level gauge; 31. First maintenance valve; 32. Purge and replacement valve; 33. Second maintenance valve; 51. Bypass pipe; 52. First bypass valve; 53. Second bypass valve; 61. Level transmitter; 62. Controller; 63. Flow regulating valve. Detailed Implementation

[0028] The principles and features of this utility model are described below. The examples given are only for explaining this utility model and are not intended to limit the scope of this utility model.

[0029] like Figure 1 As shown, this embodiment provides an acetylene pipeline low-point drainage device, including: a three-way pipe 1, a liquid collection bag 2, a drainage pipe 3, and an explosion-proof water seal tank 4. The first and second ends of the three-way pipe 1 are connected to the two ends of the low point of the acetylene delivery pipeline, the top end of the liquid collection bag 2 is connected to the third end of the three-way pipe 1, one end of the drainage pipe 3 is connected to the bottom end of the liquid collection bag 2, and the other end is connected to the explosion-proof water seal tank 4.

[0030] It should be noted that "low point of acetylene pipeline" refers to the part of the acetylene pipeline before the slope. If the pipeline before the slope is a horizontal pipeline, then the low point of the acetylene pipeline is the horizontal pipeline before the slope. If the pipeline before the slope is a downward sloping pipeline, then the low point of the acetylene pipeline is the junction of the downward sloping pipeline and the slope pipeline. Before installing the acetylene pipeline low-point drainage device provided in this embodiment at the low point of the acetylene pipeline, the pipeline at the low point needs to be disconnected first. Then, the two ends of the disconnected pipeline at the low point are connected one by one to the first and second ends of the tee pipe 1. When connecting, the two ends of the disconnected pipeline at the low point are welded one by one to the first and second ends of the tee pipe 1 to ensure that no leakage occurs at the connection.

[0031] The beneficial effects of this utility model are as follows: the first and second ends of the three-way pipe are connected one-to-one with the two ends of the low point of the acetylene transmission pipeline, which is conducive to guiding the liquid water accumulated at the low point of the acetylene transmission pipeline from the third end of the three-way pipe to the liquid accumulation bag, and then flowing along the drainage pipe to the explosion-proof water seal tank for storage. This avoids large-scale modification of the pipe gallery structure, has high safety performance, low cost and short construction period, solves the problem of liquid water accumulation blocking the pipeline, reduces the pressure of the acetylene pipeline network, and avoids affecting the normal operation of downstream devices.

[0032] Preferred, such as Figure 1As shown, it also includes a drainage control mechanism 6, which includes a level transmitter 61, a controller 62, and a flow regulating valve 63. The level transmitter 61 is fixed on the inner wall of the liquid collection bag 2, and the flow regulating valve 63 is fixed on the drainage pipe 3. The level transmitter 61 and the flow regulating valve 63 are both electrically connected to the controller 62.

[0033] It should be noted that in the technical solution of this utility model, the controller 62 is a microcontroller or a PLC (Programmable Logic Controller), and the level transmitter 61 is a level sensor; the communication and control between the level transmitter 61 and the flow regulating valve 63 and the controller 62 are all prior art. The electrical connection between the level transmitter 61 and the flow regulating valve 63 and the controller 62 is either a wire connection or a wireless connection. Figure 1 The dashed line connecting the level transmitter 61 and the controller 62 indicates a wireless connection, while the solid line connecting the flow regulating valve 63 and the controller 62 indicates a wire connection.

[0034] The advantages of adopting the above preferred solution are: the level transmitter is conducive to setting the safe threshold of the liquid level inside the liquid collection bag. If the liquid water inside the liquid collection bag rises to the height of the level transmitter, it indicates that the liquid needs to be drained. After receiving the signal, the controller controls the flow regulating valve to open, so that the liquid water accumulated inside the liquid collection bag enters the explosion-proof water seal tank through the drainage pipe for storage, thus avoiding excessive accumulation of liquid water and blockage of the acetylene delivery pipeline.

[0035] Preferred, such as Figure 1 As shown, it also includes a bypass mechanism 5, which includes a bypass pipe 51, a first bypass valve 52, and two second bypass valves 53. The first bypass valve 52 is fixed on the bypass pipe 51, and the two ends of the bypass pipe 51 are connected to the drainage pipes 3 at both ends of the flow regulating valve 63. The second bypass valves 53 are fixed on the drainage pipes 3, and the two second bypass valves 53 are fixed between the two ends of the flow regulating valve 63 and the corresponding ends of the bypass pipes 51.

[0036] It should be noted that the connection between the two ends of the flow regulating valve 63 and the corresponding end of the bypass pipe 51 refers to the connection point between the flow regulating valve 63, the end of the bypass pipe 51, and the drainage pipe 3.

[0037] The advantages of adopting the above-mentioned preferred scheme are: when the first bypass valve is open and the second bypass valve is closed, it is beneficial to realize the bypass function, so as to manually realize drainage when the drainage control mechanism fails; when the first bypass valve is closed and the second bypass valve is open, it is beneficial to close the bypass function, so as to realize the automatic discharge of water accumulated at the low point of the acetylene delivery pipeline under the control of the drainage control mechanism.

[0038] Preferred, such as Figure 1 As shown, a magnetic float level gauge 21 for viewing the liquid level inside the liquid collection bag 2 is fixed on the outer wall of the liquid collection bag 2.

[0039] It should be noted that in the technical solution of this utility model, the connection between the magnetic level gauge 21 and the liquid accumulation bag 2 is based on the principle of communicating vessels, that is, the bottom end of the magnetic level gauge 21 is connected to the lower side wall of the liquid accumulation bag 2, so that the liquid level inside the liquid accumulation bag 2 can be obtained by observing the liquid level height inside the magnetic level gauge 21.

[0040] The advantages of adopting the above-mentioned preferred solution are: the magnetic float level gauge is helpful for providing staff with information on the liquid level inside the liquid collection tank during on-site work or maintenance.

[0041] Preferred, such as Figure 1 As shown, a first inspection valve 31 is fixed on the drainage pipe 3, and the first inspection valve 31 is located near the liquid accumulation bag 2.

[0042] The advantages of adopting the above-mentioned preferred solution are: the first inspection valve is conducive to controlling the opening and closing of the liquid collection tank and the drainage pipe, thereby disconnecting the liquid collection tank from the drainage pipe during maintenance work, which facilitates the maintenance of the drainage pipe and the bypass mechanism.

[0043] Preferred, such as Figure 1 As shown, a second maintenance valve 33 is fixedly installed on the drainage pipe 3, and the second maintenance valve 33 is located near the explosion-proof water seal tank 4.

[0044] The advantages of adopting the above-mentioned preferred solution are: the second maintenance valve is conducive to controlling the opening and closing of the explosion-proof water seal tank and the drainage pipe, thereby disconnecting the explosion-proof water seal tank from the drainage pipe during maintenance work, which facilitates the maintenance of the explosion-proof water seal tank.

[0045] Preferred, such as Figure 1 As shown, a plurality of purge and displacement valves 32 are fixedly installed on the drainage pipe 3.

[0046] It should be noted that in the preferred embodiment of this utility model, there are three purge and replacement valves 32, two of which are fixed on the drainage pipe 3 between the first maintenance valve 31 and the second maintenance valve 33, and the third purge and replacement valve 32 is fixed on the drainage pipe 3 between the second maintenance valve 33 and the explosion-proof water seal tank 4. The operation of the two purge and replacement valves 32, together with the first maintenance valve 31 and the second maintenance valve 33, to purge and clean the drainage pipe 3 is as follows: close the first maintenance valve 31 and the second maintenance valve 33, disconnect the drainage pipe 3 from the liquid accumulation bag 2 and the explosion-proof water seal tank 4, open the two purge and replacement valves 32, introduce external high-pressure air into one of the purge and replacement valves 32, the high-pressure air enters the drainage pipe 3 from one of the purge and replacement valves 32 to clean the dirt inside the drainage pipe 3, and discharge the dirt from the other purge and replacement valve 32; The operation of the third purge and displacement valve 32 to replace the liquid acetylene mixed in the explosion-proof water seal tank 4 is as follows: close the second maintenance valve 33, disconnect the drainage pipe 3 from the explosion-proof water seal tank 4, open the third purge and displacement valve 32, and input the external displacement substance into the drainage pipe 3 through the third purge and displacement valve 32, and enter the explosion-proof water seal tank 4 along the drainage pipe 3, where it undergoes a displacement reaction with the liquid water mixed with liquid acetylene in the explosion-proof water seal tank 4, thereby displacing the liquid ethylene from the liquid water.

[0047] The advantages of adopting the above-mentioned preferred solution are: the purging and replacement valve is conducive to disconnecting the connection between the drainage pipe and the liquid accumulation bag and the explosion-proof water seal tank in conjunction with the first and second maintenance valves during maintenance operations, thereby purging and cleaning the drainage pipe, or replacing the liquid acetylene mixed in the explosion-proof water seal tank, avoiding the waste of chemical raw materials and avoiding pollution caused by directly discharging the liquid in the explosion-proof water seal tank.

[0048] Preferred, such as Figure 1 As shown, the three-way pipe 1 includes a first connecting pipe 11 and a second connecting pipe 12. The two ends of the first connecting pipe 11 are connected to the two ends of the lowest point of the acetylene delivery pipeline. One end of the second connecting pipe 12 is connected to the side wall of the first connecting pipe 11, and the other end is connected to the top of the liquid collection bag 2. The first connecting pipe 11 is a straight pipe or a V-shaped pipe.

[0049] It should be noted that: before installing the acetylene pipeline low-point drainage device provided in this embodiment at the low point of the acetylene pipeline, the pipe at the low point of the acetylene pipeline needs to be disconnected first. Then, the two ends of the disconnected pipe at the low point of the acetylene pipeline are connected one by one to the two ends of the first connecting pipe 11. When connecting, the two ends of the disconnected pipe at the low point of the acetylene pipeline are welded one by one to the two ends of the first connecting pipe 11 to ensure that no leakage occurs at the connection.

[0050] The beneficial effects of adopting the above-mentioned preferred scheme are: one end of the second connecting pipe is connected to the side wall of the first connecting pipe, which is conducive to forming a three-way pipe, thereby connecting the pipe at the low point of the acetylene pipeline with the liquid accumulation bag, and thus realizing the drainage of the water accumulated at the low point of the acetylene pipeline.

[0051] Preferred, such as Figure 1 As shown, the first connecting pipe 11 is a V-shaped pipe, and one end of the second connecting pipe 12 is connected to the side wall of the lowest point of the first connecting pipe 11.

[0052] It should be noted that when the first connecting pipe 11 is a V-shaped pipe, the lowest point of the first connecting pipe 11 is the inflection point of the V-shaped pipe from bottom to top.

[0053] The advantages of adopting the above preferred scheme are: the first connecting pipe is a V-shaped pipe, which is conducive to guiding the water accumulated at the low point of the acetylene pipeline downward and into the liquid collection bag through the second connecting pipe, thus avoiding the accumulation of water in the first connecting pipe.

[0054] Preferred, such as Figure 1 As shown, the explosion-proof water seal tank 4 is an atmospheric pressure closed water seal tank, and the other end of the drainage pipe 3 is connected to the water inlet of the explosion-proof water seal tank 4 through a flange.

[0055] The advantages of adopting the above preferred scheme are: the atmospheric pressure sealed water seal tank helps to reduce the safety hazards of high pressure explosion, and the flange connection helps to ensure the sealing between the drainage pipe and the water inlet of the explosion-proof water seal tank when connected.

[0056] The working process of this embodiment is as follows: like Figure 1 As shown, under initial conditions, the first maintenance valve 31, the second bypass valve 53, and the second maintenance valve 33 are all open, while the first bypass valve 52, the flow regulating valve 63, and the purge and replacement valve 32 are closed. When acetylene mixed with water vapor moves through the pipeline, the water vapor condenses into liquid water, which enters the accumulator 2 through the tee pipe 1 at the lowest point of the pipeline and accumulates in the accumulator 2. When the liquid water in the accumulator 2 accumulates to the height of the level transmitter 61, the level transmitter 61 sends a signal to the controller 62, which then sends a command to the flow regulating valve 63 to open the flow regulating valve 63. At this time, the liquid water in the accumulator 2 enters the explosion-proof water seal tank 4 through the drain pipe 3 for storage, thus preventing the accumulation of liquid water from blocking the pipeline, reducing the pressure of the acetylene pipeline network, and avoiding any impact on the normal operation of downstream devices.

[0057] When the drainage control mechanism 6 malfunctions or needs maintenance, the second bypass valve 53 is manually closed and the first bypass valve 52 is opened. After the liquid water enters the liquid collection bag 2, it will flow through the drainage pipe 3 and the bypass pipe 51 into the explosion-proof water seal tank 4 for storage.

[0058] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0059] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0060] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0061] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0062] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0063] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A low-point drainage device for acetylene pipelines, characterized in that, include: The three-way pipe (1), the liquid collection bag (2), the drainage pipe (3) and the explosion-proof water seal tank (4) are connected to the two ends of the acetylene delivery pipeline at the lowest point, respectively. The top of the liquid collection bag (2) is connected to the third end of the three-way pipe (1). One end of the drainage pipe (3) is connected to the bottom end of the liquid collection bag (2) and the other end is connected to the explosion-proof water seal tank (4).

2. The acetylene pipeline low-point drainage device according to claim 1, characterized in that, It also includes a drainage control mechanism (6), which includes a level transmitter (61), a controller (62) and a flow regulating valve (63). The level transmitter (61) is fixed on the inner wall of the liquid accumulation bag (2), and the flow regulating valve (63) is fixed on the drainage pipe (3). The level transmitter (61) and the flow regulating valve (63) are both electrically connected to the controller (62).

3. The acetylene pipeline low-point drainage device according to claim 2, characterized in that, It also includes a bypass mechanism (5), which includes a bypass pipe (51), a first bypass valve (52) and two second bypass valves (53). The first bypass valve (52) is fixed on the bypass pipe (51). The two ends of the bypass pipe (51) are connected to the drainage pipes (3) at both ends of the flow regulating valve (63). The second bypass valves (53) are fixed on the drainage pipes (3). The two second bypass valves (53) are fixed between the ends of the flow regulating valve (63) and the corresponding ends of the bypass pipes (51).

4. The acetylene pipeline low-point drainage device according to claim 1, characterized in that, A magnetic float level gauge (21) for viewing the liquid level inside the liquid collection bag (2) is fixed on the outer wall of the liquid collection bag (2).

5. The acetylene pipeline low-point drainage device according to claim 1, characterized in that, A first inspection valve (31) is fixed on the drainage pipe (3), and the first inspection valve (31) is located near the liquid accumulation bag (2).

6. The acetylene pipeline low-point drainage device according to claim 1, characterized in that, A second maintenance valve (33) is fixedly installed on the drainage pipe (3), and the second maintenance valve (33) is located near the explosion-proof water seal tank (4).

7. The acetylene pipeline low-point drainage device according to claim 1, characterized in that, Multiple purge and displacement valves (32) are fixedly installed on the drainage pipe (3).

8. The acetylene pipeline low-point drainage device according to claim 1, characterized in that, The three-way pipe (1) includes a first connecting pipe (11) and a second connecting pipe (12). The two ends of the first connecting pipe (11) are connected to the two ends of the low point of the acetylene delivery pipeline. One end of the second connecting pipe (12) is connected to the side wall of the first connecting pipe (11), and the other end is connected to the top of the liquid collection bag (2). The first connecting pipe (11) is a straight pipe or a V-shaped pipe.

9. The acetylene pipeline low-point drainage device according to claim 8, characterized in that, The first connecting pipe (11) is a V-shaped pipe, and one end of the second connecting pipe (12) is connected to the side wall of the lowest point of the first connecting pipe (11).

10. The acetylene pipeline low-point drainage device according to claim 1, characterized in that, The explosion-proof water seal tank (4) is an atmospheric pressure closed water seal tank, and the other end of the drainage pipe (3) is connected to the water inlet of the explosion-proof water seal tank (4) through a flange.

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