Natural gas agent filling device and method

Abstract

The invention discloses a natural gas agent filling device and method.The filling device comprises a basic assembly, a sealing assembly, a nozzle assembly, an ejector rod assembly and a driving device, the basic assembly is arranged on a natural gas pipeline, and the sealing assembly is arranged at the joint of the basic assembly and the natural gas pipeline; the nozzle assembly is arranged at the front end of the basic assembly and located in the natural gas pipeline, the ejector rod assembly is arranged in the basic assembly and connected with the nozzle assembly, and the driving device is arranged at the rear end of the basic assembly and connected with the ejector rod assembly. The distance between the ejector rod assembly and the nozzle assembly is controlled through the driving device, the gap between the liquid medicine flow channel and the nozzle assembly can be controlled, and therefore flow adjustment, cleaning, dredging and blocking prevention can be conducted on the nozzle assembly. The nozzle can be dredged through the driving device and the ejector rod through needle, the nozzle does not need to be detached for dredging, convenience and high efficiency are achieved, and the influence on normal natural gas conveying is small.

Description

Technical Field

[0001] The present invention relates to the technical field of natural gas production, and in particular to a natural gas agent filling device and method. Background Art

[0002] During natural gas production, to ensure safe and stable production at natural gas wells, liquid agents such as corrosion inhibitors, foaming agents, and antifreeze are injected at different production stages and locations. To ensure sufficient contact between the liquid agents and the natural gas, an atomizer is installed at the liquid injection port. However, field use has shown that after a period of use, the atomizer is prone to clogging due to impurities, low operating temperatures, and changes in liquid viscosity, which in turn affects the effectiveness of liquid injection. Current treatment methods typically require disassembly of the entire atomizer for unclogging and maintenance, which is time-consuming and labor-intensive, and can easily affect normal natural gas delivery. Summary of the Invention

[0003] In order to solve the above problems, the present invention proposes a natural gas agent filling device and method, and the technical solutions adopted are as follows.

[0004] A natural gas agent filling device, comprising:

[0005] A basic component, which is installed on a natural gas pipeline;

[0006] A sealing component is provided at the connection between the base component and the natural gas pipeline;

[0007] a nozzle assembly, disposed at the front end of the base assembly and located in the natural gas pipeline;

[0008] a push rod assembly disposed in the base assembly and connected to the nozzle assembly;

[0009] The driving device is arranged at the rear end of the base assembly and connected to the push rod assembly. The driving device controls the distance between the push rod assembly and the nozzle assembly, and can control the gap between the liquid medicine flow channel and the nozzle assembly, thereby regulating the flow, cleaning, unblocking and preventing blockage of the nozzle assembly.

[0010] Furthermore, the sealing assembly includes a first sealing pressure cap (9) and a first sealing ring (10), the basic assembly includes a mounting rod (1), the mounting rod (1) is provided with a limiting portion for mounting the first sealing ring (10) on the outside, and the first sealing pressure cap (9) is used to fix the first sealing ring (10) on the limiting portion and the mounting rod (1), thereby sealing the hole of the natural gas pipeline through the first sealing pressure cap (9) and the first sealing ring (10).

[0011] Furthermore, the basic assembly comprises a mounting rod (1), a first conversion joint (5), and a second conversion joint (6); one end of the mounting rod (1) is located in the first conversion joint (5) and is sealedly connected to the first conversion joint (5); one end of the second conversion joint (6) is fixedly connected to the output end of the drive device, and the other end is fixedly connected to the first conversion joint (5).

[0012] Furthermore, the push rod assembly includes a push rod connecting rod (82), a push rod body (8) and a push rod needle (81) connected in sequence, one end of the push rod body (8) passes through the installation rod (1) and is located in the first conversion joint (5) and is fixedly connected to one end of the push rod connecting rod (82), and the other end of the push rod connecting rod (82) passes through the first conversion joint (5) and is located in the second conversion joint (6), and is fixedly connected to the push rod of the driving device; the push rod connecting rod (82) is inserted into the push rod, and the push rod connecting rod (82) and the push rod are fixed together by bolts, and a connecting tube is provided on the outer surface of the connection between the two to reinforce the connection; an opening is provided on the side of the middle part of the second conversion joint (6), and the opening is connected to the cavity for installing the push rod and the push rod connecting rod (82), thereby reducing the dead weight of the second conversion joint (6) and facilitating the observation of the connection between the push rod and the push rod connecting rod (82).

[0013] Furthermore, the push rod connecting rod (82) is provided with a second sealing pressure cap (11) and a second sealing ring (12) on the inner end of the first conversion joint (5), and the second sealing pressure cap (11) and the second sealing ring (12) ensure the sealing of the connection between the push rod connecting rod (82) and the first conversion joint (5).

[0014] Furthermore, the other end of the mounting rod (1) is provided with a liquid medicine flow channel (13) and a mounting cavity (14), the liquid medicine flow channel (13) and the mounting cavity (14) are connected, and the mounting cavity (14) is used to install the nozzle body (2) of the nozzle assembly; the other end of the push rod body (8) is located in the liquid medicine flow channel (13), the interior of the push rod body (8) is hollow and forms a push rod flow channel (83), the push rod body (8) is provided with a liquid inlet at the end of the first conversion joint (5) and is connected to the push rod flow channel (83), the push rod body (8) is provided with a liquid outlet at the other end of the push rod flow channel (83), the liquid outlet is connected to the liquid medicine flow channel (13), so that the medicine can be added to the nozzle body (2) through the push rod flow channel (83); the end of the push rod body (8) located in the liquid medicine flow channel (13) is fixedly connected to the push rod needle (81).

[0015] Furthermore, the side of the first conversion joint (5) is provided with a medicine filling port (51) for adding medicine into the push rod body (8), the first conversion joint (5) is provided with a liquid collecting chamber, the medicine filling port (51) is communicated with the liquid collecting chamber, the liquid inlet of the push rod body (8) is located in the liquid collecting chamber, and the medicine filling port (51) is conveniently communicated with the liquid inlet; when the driving device controls the push rod needle (81) to retract, the medicine filling port (51) is connected to the push rod flow channel (8 3) connected, the medicine from the medicine filling port (51) enters the push rod flow channel (83) in the push rod body (8), then enters the medicine liquid flow channel (13), and then enters the nozzle flow channel from the medicine liquid flow channel (13), and is ejected from the vertical nozzle (22) of the nozzle assembly to be evenly mixed with the natural gas; at the same time, the nozzle flow rate can be adjusted by controlling the retraction distance of the push rod needle (81), and the impurities at the vertical nozzle (22) can be flushed and cleaned through the flow rate adjustment.

[0016] Furthermore, the push rod body (8) is provided with a plurality of groups of liquid inlets, and each group of liquid inlets is circumferentially arranged on the push rod body (8), so as to facilitate the rapid entry of the medicine into the push rod body (8).

[0017] Furthermore, the diameter of the liquid medicine flow channel (13) is smaller than the diameter of the installation cavity (14), and the nozzle body (2) is provided with a copper pad near the end of the liquid medicine flow channel (13) to ensure the sealing performance of the connection between the nozzle body (2) and the liquid medicine flow channel and prevent the medicine from entering the installation cavity (14).

[0018] Furthermore, the nozzle assembly further comprises a nozzle nut (3), the nozzle body (2) is located in the mounting cavity (14), and the nozzle nut (3) is used to fix the nozzle body (2) on the mounting rod (1) and to locate the mounting position of the nozzle body (2) so that the position of the ejector pin (81) and the nozzle flow channel correspond to each other.

[0019] Furthermore, the nozzle body (2) and the mounting cavity (14) are sealed and connected, and a push cavity (21), a vertical nozzle (22) and a push plug (4) are provided in the nozzle body (2), and a nozzle flow channel with two ends passing through is provided in the push plug (4), one end of the push plug (4) is in communication with the push cavity (21), and the other end passes through the push cavity (21) and is in communication with the vertical nozzle (22), and a reset member for controlling the reset of the push plug (4) is provided in the push cavity (21).

[0020] Furthermore, the reset member includes a spring (41), and the push plug (4) is provided with a sliding portion near the outer side of the nozzle flow channel end, and the sliding portion is slidingly and sealingly connected to the inner wall of the push cavity (21), and the diameter of the sliding portion is larger than the diameter of the push plug (4). A spring cavity is formed between the sliding portion and the end of the mounting cavity (14) near the vertical nozzle (22), and the push plug (4) is provided with a spring (41), and the spring (41) is located in the spring cavity; when the push rod needle (81) causes the push plug (4) to move toward the vertical nozzle (22), the spring (41) is compressed on the sliding portion and the side wall of the mounting cavity (14) under the action of the sliding portion; when the push rod needle (81) moves toward the liquid medicine flow channel (13), the push plug (4) quickly returns to its original position under the action of the spring (41).

[0021] Furthermore, the sliding portion is integrally formed with the push plug (4) to increase the strength of the push plug (4) and ensure the sealing between the push plug (4) and the sliding portion; the axes of the sliding portion, the push plug (4) and the spring (41) are the same to ensure the direction of the force exerted by the spring (41) on the push plug (4).

[0022] Furthermore, the vertical nozzle (22) is provided with a conical protrusion facing the push plug (4) on the side away from the push plug (4), and the conical protrusion is used to seal the nozzle flow channel, so that the sealing performance of the nozzle flow channel is better.

[0023] A method for adding a natural gas agent comprises the following steps:

[0024] Step 1: Connecting the medicine storage tank and the medicine filling port (51) of the first conversion joint (5) through a medicine supply pipeline;

[0025] Step 2: Obtain the pressure value in the natural gas pipeline and pressurize the agent in the drug supply pipeline according to the pressure value of the natural gas pipeline. The pressure of the agent after pressurization should be greater than the pressure in the natural gas pipeline;

[0026] Step 3: Obtain the temperature of the natural gas pipeline reagent addition port, and control the speed of the injection pump inverter based on this temperature to control the amount of reagent added, so that the temperature of the natural gas pipeline reagent addition port is maintained within the preset temperature range;

[0027] Step 4: Obtain the liquid level value of the pharmaceutical storage tank, and issue an alarm when the liquid level value of the pharmaceutical storage tank is less than a preset value;

[0028] Step 5: changing the position of the ejector pin (81) in the liquid medicine flow channel (13) within a preset time interval to adjust the pressure of the medicine in the nozzle flow channel and perform intermittent cleaning on the nozzle;

[0029] Step 6: After adding the reagent into the natural gas pipeline, the push rod needle (81) is controlled to move toward the nozzle to block the nozzle flow channel and the vertical nozzle (22), and the nozzle body (2) is cleaned externally.

[0030] Furthermore, in step 4, the method for obtaining the liquid level value of the pharmaceutical storage tank includes:

[0031] Measure the liquid level of the chemical storage tank using a level gauge; or

[0032] Calculate the level value based on the size of the tank; or

[0033] The filling flow rate of the agent is obtained through the flow meter, and the filling flow rate of the agent = the change of the tank liquid level per unit time / unit time, thereby obtaining the liquid level value of the agent storage tank; or

[0034] The liquid level of the chemical storage tank can be observed through the transparent communicating vessel.

[0035] In summary, the working principle of the present invention is as follows:

[0036] When it is necessary to add reagents to the natural gas pipeline, the driving device controls the movement of the push rod body to retract the push rod needle, so that the reagent filling port is connected with the liquid inlet. The high-pressure reagent in the reagent filling port enters the push rod body, then enters the liquid flow channel, and then enters the nozzle flow channel from the liquid flow channel and is ejected from the vertical nozzle.

[0037] When the nozzle needs to be cleaned, the drive device controls the retraction of the ejector pin to increase the gap between the liquid flow channel and the nozzle. At this time, the agent filling port is still connected to the liquid inlet, and the filling pressure is reduced at the same time, changing the flow and pressure in the nozzle to clean impurities around the vertical nozzle of the nozzle body.

[0038] When the nozzle flow channel needs to be unblocked and blocked, the driving device controls the push rod needle to move in the nozzle flow channel, the agent filling port is not connected with the liquid inlet, and the addition of agent is stopped. When the push rod needle moves, impurities in the nozzle flow channel are pushed out to unblock the nozzle flow channel and block the nozzle flow channel to prevent water and impurities from entering the nozzle flow channel during external flushing of the nozzle body. At the same time, the push plug moves in the pushing cavity with the push rod needle. After unblocking is completed, the push rod needle continues to block the nozzle flow channel to prevent impurities from entering the nozzle.

[0039] The beneficial effects of the present invention are:

[0040] The present invention unclogs the nozzle through the driving device and the push rod needle, and there is no need to disassemble the nozzle for dredging, which is more convenient and efficient, and has less impact on normal natural gas transportation; at the same time, the nozzle is blocked under the action of the push rod needle to prevent external cleaning impurities from entering the nozzle flow channel; the distance between the push rod needle and the nozzle can be controlled by the driving device, and the gap between the liquid medicine flow channel and the nozzle is controlled, so as to adjust the flow of the nozzle, and the impurities at the nozzle outlet can be flushed and cleaned through the flow adjustment. The flow adjustment is performed to dredge the nozzle flow channel while the agent is added, and the addition of the agent to the natural gas pipeline is not affected. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 It is a structural schematic diagram of the natural gas agent filling device of Example 1 of the present invention.

[0042] Figure 2 It is a top view of the natural gas agent filling device according to embodiment 1 of the present invention.

[0043] Figure 3 yes Figure 2 Cross-sectional view in the AA direction.

[0044] Figure 4 yes Figure 3 A partial enlarged view of . DETAILED DESCRIPTION

[0045] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific embodiments of the present invention are now described. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention. That is, the embodiments described are only part of the embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of the present invention.

[0046] Example 1

[0047] like Figures 1 to 3 As shown, this embodiment provides a natural gas agent filling device, including a base assembly, a sealing assembly, a nozzle assembly, a push rod assembly, and a drive device. The base assembly is installed on the natural gas pipeline, the sealing assembly is installed at the connection between the base assembly and the natural gas pipeline, the nozzle assembly is installed at the front end of the base assembly and is located in the natural gas pipeline, the push rod assembly is installed in the base assembly and connected to the nozzle assembly, and the drive device is installed at the rear end of the base assembly and connected to the push rod assembly. The drive device controls the distance between the push rod assembly and the nozzle assembly, and thus the gap between the liquid medicine flow channel and the nozzle assembly, thereby regulating the flow rate, cleaning, unblocking, and preventing blockage of the nozzle assembly.

[0048] Preferably, the sealing assembly includes a first sealing cap 9 and a first sealing ring 10. The base assembly includes a mounting rod 1. The mounting rod 1 is provided with a stopper for mounting the first sealing ring 10. The first sealing cap 9 is used to secure the first sealing ring 10 to the stopper and the mounting rod 1. Thus, the first sealing cap 9 and the first sealing ring 10 seal the hole in the natural gas pipeline, providing good sealing performance and easy installation. Multiple first sealing rings 10 are installed at the stopper to improve sealing performance. In this embodiment, the number of first sealing rings 10 is specifically four.

[0049] Preferably, the basic component includes a mounting rod 1, a first conversion joint 5 and a second conversion joint 6, one end of the mounting rod 1 is located in the first conversion joint 5 and is sealed with the first conversion joint 5; one end of the second conversion joint 6 is fixedly connected to the output end of the drive device, specifically, it can be fixedly connected by 4 bolts; the other end of the second conversion joint 6 is fixedly connected to the first conversion joint 5, specifically, it can be fixedly connected by 4 bolts.

[0050] Preferably, the driving device in this embodiment is implemented by a servo electric cylinder 7 .

[0051] Preferably, the push rod assembly includes a push rod connecting rod 82, a push rod body 8 and a push rod needle 81 connected in sequence. One end of the push rod body 8 passes through the mounting rod 1 and is located in the first conversion joint 5 and is fixedly connected to one end of the push rod connecting rod 82. In this embodiment, the connection is specifically performed by welding.

[0052] The other end of the push rod connecting rod 82 passes through the first adapter 5 and is located within the second adapter 6, where it is fixedly connected to the push rod of the servo electric cylinder 7. The push rod connecting rod 82 is inserted into the push rod and bolted together. A connecting sleeve is provided at the junction between the two to reinforce the connection. An opening is provided on the side of the middle of the second adapter 6, which communicates with the cavity for mounting the push rod and push rod connecting rod 82. This reduces the weight of the second adapter 6 and facilitates observation of the connection between the push rod and push rod connecting rod 82.

[0053] Preferably, a second sealing cap 11 and a second sealing ring 12 are provided on the inner end of the push rod connecting rod 82 located on the first adapter 5. These second sealing cap 11 and second sealing ring 12 are used to seal the connection between the push rod connecting rod 82 and the first adapter 5. These second sealing cap 11 and second sealing ring 12 ensure a tight seal between the push rod connecting rod 82 and the first adapter 5, ensuring a tight seal between the two during movement of the push rod connecting rod 82. In this embodiment, two second sealing rings 12 are provided.

[0054] Preferably, the other end of the mounting rod 1 is provided with a liquid medicine flow channel 13 and a mounting cavity 14, the liquid medicine flow channel 13 and the mounting cavity 14 are connected, and the mounting cavity 14 is used to install the nozzle body 2 of the nozzle assembly; the other end of the push rod body 8 is located in the liquid medicine flow channel 13, the interior of the push rod body 8 is hollow and forms a push rod flow channel 83, the push rod body 8 is provided with a liquid inlet at the end of the first conversion joint 5 and is connected with the push rod flow channel 83, and the push rod body 8 is provided with a liquid outlet at the other end of the push rod flow channel 83, and the liquid outlet is connected to the liquid medicine flow channel 13, so that the agent can be added to the nozzle body 2 through the push rod flow channel 83.

[0055] Preferably, one end of the ejector body 8 located in the liquid medicine flow channel 13 is fixedly connected to the ejector needle 81 , and in this embodiment, welding is specifically adopted.

[0056] Preferably, a medicine filling port 51 for adding medicine to the push rod body 8 is provided on the side of the first conversion joint 5. A liquid collecting chamber is provided in the first conversion joint 5. The medicine filling port 51 is connected to the liquid collecting chamber. The liquid inlet of the push rod body 8 is located in the liquid collecting chamber, which facilitates the communication between the medicine filling port 51 and the liquid inlet. When the servo electric cylinder 7 controls the push rod needle 81 to retract, the medicine filling port 51 is connected to the push rod flow channel 83. The medicine in the medicine filling port 51 enters the push rod flow channel 83 in the push rod body 8, then enters the liquid medicine flow channel 13, and then enters the nozzle flow channel from the liquid medicine flow channel 13, and is ejected from the vertical nozzle 22 of the nozzle assembly to be evenly mixed with the natural gas. At the same time, controlling the retraction distance of the push rod needle 81 can adjust the nozzle flow rate, and the impurities at the vertical nozzle 22 can be flushed and cleaned by adjusting the flow rate.

[0057] Preferably, a plurality of groups of liquid inlets are provided on the push rod body 8 , and each group of liquid inlets is circumferentially arranged on the push rod body 8 , so as to facilitate the rapid entry of the medicine into the push rod body 8 .

[0058] Preferably, the diameter of the liquid medicine flow channel 13 is smaller than the diameter of the installation cavity 14, and the nozzle body 2 is provided with a copper pad near the end of the liquid medicine flow channel 13 to ensure the sealing of the connection between the nozzle body 2 and the liquid medicine flow channel, prevent the medicine from entering the installation cavity 14, and thus prevent the medicine from leaking.

[0059] Preferably, the nozzle assembly also includes a nozzle nut 3, and the nozzle body 2 is located in the installation cavity 14. The nozzle nut 3 is used to fix the nozzle body 2 on the installation rod 1 and to locate the installation position of the nozzle body 2 so that the push rod needle 81 and the nozzle flow channel position correspond to each other.

[0060] Preferably, the nozzle body 2 and the mounting cavity 14 are sealed and connected, and a push cavity 21, a vertical nozzle 22 and a push plug 4 are provided in the nozzle body 2. The push plug 4 is provided with a nozzle flow channel with two ends passing through. One end of the push plug 4 is connected to the push cavity 21, and the other end passes through the push cavity 21 and is connected to the vertical nozzle 22. A reset part for controlling the reset of the push plug 4 is provided in the push cavity 21.

[0061] Preferably, if Figure 4 As shown, the reset member includes a spring 41, and a sliding portion is provided on the outer side of the push plug 4 near the nozzle flow channel end. The sliding portion is slidably and sealedly connected to the inner wall of the push cavity 21. The diameter of the sliding portion is larger than the diameter of the push plug 4. A spring cavity is formed between the sliding portion and the end of the mounting cavity 14 near the vertical nozzle 22. A spring 41 is sleeved on the push plug 4, and the spring 41 is located in the spring cavity; when the push rod needle 81 moves the push plug 4 toward the vertical nozzle 22, the spring 41 is compressed on the sliding portion and the side wall of the mounting cavity 14 under the action of the sliding portion; when the push rod needle 81 moves toward the liquid flow channel 13, the push plug 4 quickly returns to its original position under the action of the spring 41.

[0062] Preferably, the sliding part and the push plug 4 are integrally formed to increase the strength of the push plug 4 and ensure the sealing between the push plug 4 and the sliding part; the axes of the sliding part, the push plug 4 and the spring 41 are the same to ensure the direction of the force exerted by the spring 41 on the push plug 4.

[0063] Preferably, a conical protrusion facing the push plug 4 is provided on the side of the vertical nozzle 22 away from the push plug 4. The conical protrusion is used to seal the nozzle flow channel, so that the sealing performance of the nozzle flow channel is better.

[0064] Example 2

[0065] This embodiment is based on embodiment 1:

[0066] This embodiment provides a method for adding a natural gas agent, comprising the following steps:

[0067] Step 1: Connect the medicine storage tank and the medicine filling port 51 of the first conversion joint 5 through the medicine supply pipeline. The medicine supply pipeline in this step is conventional and will not be described in detail here.

[0068] Step 2: Obtain the pressure value in the natural gas pipeline and pressurize the agent in the drug supply pipeline according to the pressure value of the natural gas pipeline. The pressure of the agent after pressurization should be greater than the pressure in the natural gas pipeline;

[0069] Step 3: Obtain the temperature of the natural gas pipeline reagent addition port, and control the speed of the injection pump inverter based on this temperature to control the amount of reagent added, so that the temperature of the natural gas pipeline reagent addition port is maintained within the preset temperature range;

[0070] Step 4: Obtain the liquid level value of the pharmaceutical storage tank, and issue an alarm when the liquid level value of the pharmaceutical storage tank is less than a preset value;

[0071] Step 5: Change the position of the ejector pin 81 in the liquid medicine channel 13 within a preset time interval to adjust the pressure of the medicine in the nozzle channel and perform intermittent cleaning of the nozzle; the time interval in this step can be set according to actual conditions;

[0072] Step 6: After adding the reagent into the natural gas pipeline, control the push rod needle 81 to move toward the nozzle to block the nozzle flow channel and the vertical nozzle 22, and clean the nozzle body 2 from the outside.

[0073] Preferably, in step 4, the method for obtaining the liquid level value of the medicine storage tank may be:

[0074] Measure the liquid level of the chemical storage tank using a level gauge; or

[0075] Calculate the liquid level value based on the size of the tank (volume = bottom * height); or

[0076] The filling flow rate of the agent is obtained through the flow meter, and the filling flow rate of the agent = the change of the tank liquid level per unit time / unit time, thereby obtaining the liquid level value of the agent storage tank; or

[0077] The liquid level of the chemical storage tank can be observed through the transparent communicating vessel.

[0078] The foregoing description is merely a preferred embodiment of the present invention. It should be understood that the present invention is not limited to the form disclosed herein and should not be construed as excluding other embodiments. Rather, the present invention can be used in various other combinations, modifications, and environments and can be modified within the scope of the concept described herein through the above teachings or techniques or knowledge in the relevant field. Modifications and variations made by those skilled in the art that do not depart from the spirit and scope of the present invention are intended to be protected by the appended claims.

Claims

1. A natural gas agent filling device, characterized in that: include: A basic component, which is installed on a natural gas pipeline; A sealing component is provided at the connection between the base component and the natural gas pipeline; a nozzle assembly, disposed at the front end of the base assembly and located in the natural gas pipeline; a push rod assembly disposed in the base assembly and connected to the nozzle assembly; The driving device is arranged at the rear end of the base assembly and connected to the push rod assembly. The driving device controls the distance between the push rod assembly and the nozzle assembly, and can control the gap between the liquid medicine flow channel and the nozzle assembly, thereby regulating the flow, cleaning, unblocking and preventing blockage of the nozzle assembly.

2. A natural gas agent filling device according to claim 1, characterized in that: The sealing assembly comprises a first sealing pressure cap (9) and a first sealing ring (10); the basic assembly comprises a mounting rod (1); a limiting portion for mounting the first sealing ring (10) is provided on the outside of the mounting rod (1); the first sealing pressure cap (9) is used to fix the first sealing ring (10) on the limiting portion and the mounting rod (1), thereby sealing the hole of the natural gas pipeline through the first sealing pressure cap (9) and the first sealing ring (10).

3. A natural gas agent filling device according to claim 1, characterized in that: The basic assembly comprises a mounting rod (1), a first conversion joint (5), and a second conversion joint (6); one end of the mounting rod (1) is located in the first conversion joint (5) and is sealedly connected to the first conversion joint (5); one end of the second conversion joint (6) is fixedly connected to the output end of the drive device, and the other end is fixedly connected to the first conversion joint (5).

4. A natural gas agent filling device according to claim 3, characterized in that: The push rod assembly comprises a push rod connecting rod (82), a push rod body (8) and a push rod needle (81) connected in sequence, one end of the push rod body (8) passes through the installation rod (1) and is located in the first conversion joint (5) and is fixedly connected to one end of the push rod connecting rod (82), the other end of the push rod connecting rod (82) passes through the first conversion joint (5) and is located in the second conversion joint (6), and is fixedly connected to the push rod of the driving device; the push rod connecting rod (82) is inserted into the push rod, and the push rod connecting rod (82) and the push rod are fixed together by bolts, and a connecting tube is provided on the outer surface of the connection between the two to reinforce the connection; an opening is provided on the side of the middle part of the second conversion joint (6), and the opening is connected to the cavity for installing the push rod and the push rod connecting rod (82), thereby reducing the dead weight of the second conversion joint (6) and facilitating the observation of the connection between the push rod and the push rod connecting rod (82).

5. A natural gas agent filling device according to claim 4, characterized in that: The push rod connecting rod (82) is provided with a second sealing pressure cap (11) and a second sealing ring (12) on the inner end of the first conversion joint (5), and the second sealing pressure cap (11) and the second sealing ring (12) ensure the sealing performance of the connection between the push rod connecting rod (82) and the first conversion joint (5).

6. A natural gas agent filling device according to claim 5, characterized in that: The other end of the mounting rod (1) is provided with a liquid medicine flow channel (13) and a mounting cavity (14), the liquid medicine flow channel (13) and the mounting cavity (14) are communicated with each other, and the mounting cavity (14) is used to install the nozzle body (2) of the nozzle assembly; the other end of the push rod body (8) is located in the liquid medicine flow channel (13), the interior of the push rod body (8) is hollow and forms a push rod flow channel (83), the push rod body (8) is provided with a liquid inlet at the end of the first conversion joint (5) and is communicated with the push rod flow channel (83), the push rod body (8) is provided with a liquid outlet at the other end of the push rod flow channel (83), the liquid outlet is communicated with the liquid medicine flow channel (13), so that the medicine can be added to the nozzle body (2) through the push rod flow channel (83); the end of the push rod body (8) located in the liquid medicine flow channel (13) is fixedly connected to the push rod needle (81).

7. A natural gas agent filling device according to claim 6, characterized in that: The first conversion joint (5) is provided with a medicine filling port (51) on the side thereof for adding medicine into the push rod body (8), a liquid collecting chamber is provided in the first conversion joint (5), the medicine filling port (51) is communicated with the liquid collecting chamber, and the liquid inlet of the push rod body (8) is located in the liquid collecting chamber, so that the medicine filling port (51) is communicated with the liquid inlet; when the driving device controls the push rod needle (81) to retract, the medicine filling port (51) is communicated with the push rod flow channel (83), and the medicine in the medicine filling port (51) enters the push rod flow channel (83) in the push rod body (8), then enters the medicine liquid flow channel (13), and then enters the nozzle flow channel from the medicine liquid flow channel (13), and is ejected from the vertical nozzle (22) of the nozzle assembly to be evenly mixed with the natural gas; At the same time, the nozzle flow rate can be adjusted by controlling the retraction distance of the ejector pin (81), and the impurities at the vertical nozzle (22) can be flushed and cleaned through the flow rate adjustment.

8. A natural gas agent filling device according to claim 7, characterized in that: The push rod body (8) is provided with a plurality of groups of liquid inlets, and each group of liquid inlets is circumferentially arranged on the push rod body (8), so as to facilitate the rapid entry of the medicine into the push rod body (8).

9. A natural gas agent filling device according to claim 7, characterized in that: The diameter of the liquid medicine flow channel (13) is smaller than the diameter of the installation cavity (14), and a copper pad is provided at the end of the nozzle body (2) close to the liquid medicine flow channel (13) to ensure the sealing performance of the connection between the nozzle body (2) and the liquid medicine flow channel and prevent the medicine from entering the installation cavity (14).

10. A natural gas agent filling device according to claim 7, characterized in that: The nozzle assembly further comprises a nozzle nut (3), the nozzle body (2) is located in the mounting cavity (14), and the nozzle nut (3) is used to fix the nozzle body (2) on the mounting rod (1) and to locate the mounting position of the nozzle body (2) so that the positions of the ejector pin (81) and the nozzle flow channel correspond to each other.

11. A natural gas agent filling device according to claim 7, characterized in that: The nozzle body (2) and the mounting cavity (14) are sealed and connected. A push cavity (21), a vertical nozzle (22) and a push plug (4) are provided in the nozzle body (2). A nozzle flow channel with two ends passing through is provided in the push plug (4). One end of the push plug (4) is in communication with the push cavity (21), and the other end passes through the push cavity (21) and is in communication with the vertical nozzle (22). A reset member for controlling the reset of the push plug (4) is provided in the push cavity (21).

12. A natural gas agent filling device according to claim 11, characterized in that: The reset member includes a spring (41), and the push plug (4) is provided with a sliding portion near the outer side of the nozzle flow channel end, and the sliding portion is slidably and sealedly connected to the inner wall of the push cavity (21). The diameter of the sliding portion is larger than the diameter of the push plug (4), and a spring cavity is formed between the sliding portion and the end of the mounting cavity (14) near the vertical nozzle (22). The push plug (4) is sleeved with a spring (41), and the spring (41) is located in the spring cavity; when the push pin (81) causes the push plug (4) to move toward the vertical nozzle (22), the spring (41) is compressed on the sliding portion and the side wall of the mounting cavity (14) under the action of the sliding portion; when the push pin (81) moves toward the liquid medicine flow channel (13), the push plug (4) quickly returns to its original position under the action of the spring (41).

13. A natural gas agent filling device according to claim 12, characterized in that: The sliding portion is integrally formed with the push plug (4) to increase the strength of the push plug (4) and ensure the sealing between the push plug (4) and the sliding portion; the axes of the sliding portion, the push plug (4) and the spring (41) are the same to ensure the direction of the force exerted by the spring (41) on the push plug (4).

14. The natural gas agent filling device according to claim 11, characterized in that: The vertical nozzle (22) is provided with a conical protrusion facing the push plug (4) on the side away from the push plug (4), and the conical protrusion is used to seal the nozzle flow channel, so that the sealing performance of the nozzle flow channel is better.

15. A natural gas agent filling method, applied to the natural gas agent filling device according to claims 7-14, characterized in that: The following steps are involved: Step 1: Connecting the medicine storage tank and the medicine filling port (51) of the first conversion joint (5) through a medicine supply pipeline; Step 2: Obtain the pressure value in the natural gas pipeline and pressurize the agent in the drug supply pipeline according to the pressure value of the natural gas pipeline. The pressure of the agent after pressurization should be greater than the pressure in the natural gas pipeline; Step 3: Obtain the temperature of the natural gas pipeline reagent addition port, and control the speed of the injection pump inverter based on this temperature to control the amount of reagent added, so that the temperature of the natural gas pipeline reagent addition port is maintained within the preset temperature range; Step 4: Obtain the liquid level value of the pharmaceutical storage tank, and issue an alarm when the liquid level value of the pharmaceutical storage tank is less than a preset value; Step 5: changing the position of the ejector pin (81) in the liquid medicine flow channel (13) within a preset time interval to adjust the pressure of the medicine in the nozzle flow channel and perform intermittent cleaning on the nozzle; Step 6: After adding the reagent into the natural gas pipeline, the push rod needle (81) is controlled to move toward the nozzle to block the nozzle flow channel and the vertical nozzle (22), and the nozzle body (2) is cleaned externally.

16. A natural gas agent filling method according to claim 15, characterized in that: In step 4, the method for obtaining the liquid level value of the pharmaceutical storage tank includes: Measure the liquid level of the chemical storage tank using a level gauge; or Calculate the level value based on the size of the tank; or The filling flow rate of the agent is obtained through the flow meter, and the filling flow rate of the agent = the change of the tank liquid level per unit time / unit time, thereby obtaining the liquid level value of the agent storage tank; or The liquid level of the chemical storage tank can be observed through the transparent communicating vessel.

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