Oil and gas recovery gas-liquid separator

Abstract

The utility model discloses an oil-gas recovery gas-liquid separator, comprising a tank body, a valve body assembly, a valve core assembly and a float. The tank body is provided with a liquid inlet pipe, an air outlet pipe and a liquid outlet pipe. The valve body assembly is arranged in the liquid outlet pipe, and a first channel, a second channel and a balance hole are arranged inside the valve body assembly. The first channel is arranged axially along the valve body assembly, one end of the second channel is communicated with the first channel, one end of the balance hole is located at the top end surface of the valve body assembly, and the other end is communicated with the bottom end of the first channel. The valve core assembly comprises a rod body and a valve core body protruding circumferentially from the rod body, the rod body is at least partially located in the first channel, and the valve core body is located at the top of the first channel. The float is arranged at the top of the valve core body and connected to the rod body. The oil-gas recovery gas-liquid separator in the embodiment of the utility model can transport liquid oil to the bottom end of the valve core assembly through the balance hole under internal pressurization, provide an upward thrust to the valve core assembly, so that the float can drive the valve core assembly to move upward.

Description

Technical Field

[0001] The utility model belongs to the technical field of oil and gas recovery, and specifically relates to an oil and gas recovery gas-liquid separator. Background Art

[0002] Gasoline and gas recovery at gas stations refers to the collection of volatile gasoline and gas during the process of loading and unloading gasoline and refueling vehicles, and the conversion of the gas from gas to liquid through absorption, adsorption and condensation, and then back to gasoline for the purpose of recycling.

[0003] Existing oil and gas recovery equipment generally uses gas compression equipment. Some impurity gases in the gas compression equipment will be liquefied and mixed into the liquid oil, so a gas-liquid separator is needed to separate the liquid oil from the impurity gases. However, the current gas-liquid separator is generally directly connected to the oil and gas recovery equipment, and its interior is pressurized in most cases, causing the valve core of the float valve at the internal liquid outlet pipe to be subjected to a large downward pressure, making it difficult for the float to drive the valve core to move, causing the liquid outlet pipe to be blocked and unable to discharge the liquid oil smoothly.

[0004] The information disclosed in this background technology section is only intended to increase the understanding of the overall background of the present invention, and should not be regarded as acknowledging or suggesting in any form that the information constitutes the prior art already known to a person skilled in the art. Utility Model Content

[0005] The utility model aims to provide an oil-gas recovery gas-liquid separator, which can transport liquid oil to the bottom end of the valve core assembly through a balance hole under internal pressurization, provide an upward thrust to the valve core assembly, so that the float can drive the valve core assembly to move upward.

[0006] In order to achieve the above-mentioned purpose, a specific embodiment of the utility model provides an oil-gas recovery gas-liquid separator, including a tank body, a valve body assembly, a valve core assembly and a float. A liquid inlet pipe and an air outlet pipe are provided at the top of the tank body, and a liquid outlet pipe is provided at the bottom. The valve body assembly is at least partially arranged in the liquid outlet pipe, and a first channel, a second channel and a balance hole are provided inside the valve body assembly. The first channel is axially arranged along the valve body assembly and the top end is connected to the internal space of the tank body. One end of the second channel is connected to the first channel and the other end extends to the outer surface of the valve body assembly. One end of the balance hole is located on the top end face of the valve body assembly, and the other end is connected to the bottom end of the first channel. The valve core assembly includes a rod body and a valve core body protruding circumferentially from the rod body. The rod body is at least partially located in the first channel. The valve core body is located at the top of the first channel and can move axially along the first channel to close or open the first channel. The float is arranged at the top of the valve core body and connected to the rod body.

[0007] In one or more embodiments of the present invention, the valve body assembly includes a valve body, a base and a bottom cover, the top end of the valve body is arranged in the liquid outlet pipe, the bottom end of the valve body is provided with a mounting groove for inserting the base, the first channel runs through the valve body and the base, the balancing hole runs through the valve body in the axial direction of the valve body, the bottom cover is sleeved on the bottom end of the valve body, and there is a gap between the bottom inner wall of the bottom cover and the bottom wall of the valve body, and the gap is connected with the bottom end of the first channel and the bottom end of the balancing hole.

[0008] In one or more embodiments of the utility model, the first channel includes a drainage section, an intermediate section and a filling section which are arranged in sequence from top to bottom. The drainage section and the intermediate section are located in the valve body, the filling section is located in the base, the circumferential dimension of the intermediate section is smaller than the circumferential dimension of the drainage section and the filling section, a pressure piece is provided in the filling section, the bottom end of the rod body extends into the filling section, and the pressure piece abuts against the bottom end of the rod body in a floating state.

[0009] In one or more embodiments of the utility model, the first channel also includes a guide section located in the base and at the bottom of the liquid-filled section, the circumferential dimension of the guide section is smaller than the circumferential dimension of the liquid-filled section, and the pressure piece includes a coaxially connected plate portion and a rod portion, the plate portion is located in the liquid-filled section, and the rod portion is located in the guide section.

[0010] In one or more embodiments of the present invention, a protrusion abutting against the bottom cover is provided at the bottom end of the base, the first channel passes through the protrusion, and a penetrating communication port is provided on the circumference of the protrusion.

[0011] In one or more embodiments of the utility model, a socket axially penetrating the float is provided in the float, the rod body penetrates the socket, a stopper is provided on the top of the rod body, and the circumferential dimension of the stopper is larger than the circumferential dimension of the socket.

[0012] In one or more embodiments of the present invention, the rod body includes a first rod body and a second rod body, the first rod body is detachably connected to the bottom end of the second rod body, the second rod body is at least partially located in the socket and the top end is connected to the stopper, and the valve core body is arranged on the first rod body.

[0013] In one or more embodiments of the present invention, a groove communicating with the top of the first channel is provided at the top of the valve body, a limiter is provided in the groove, and the limiter is located at the top of the valve core body for limiting the valve core body in the groove.

[0014] In one or more embodiments of the present invention, a receiving groove is provided on one side of the first channel close to the valve core body, and a first sealing ring is provided in the receiving groove. The valve core body is at least partially in contact with the first sealing ring in a static state to seal the top of the first channel.

[0015] In one or more embodiments of the present invention, a second sealing ring is provided at the bottom end of the liquid filling section, and the plate portion of the pressing member presses against the top of the second sealing ring in a static state to seal the liquid filling section.

[0016] Compared with the prior art, in the oil and gas recovery gas-liquid separator of the utility model, when the interior of the tank is pressurized, the liquid oil in the tank can flow into the bottom end of the first channel through the balance hole, providing an upward thrust to the valve core assembly, so that the float can drive the valve core assembly to move upward and open the first channel to discharge the liquid oil in the tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the implementation of the utility model or the technical solution in the prior art, the following is a brief introduction to the drawings required for the implementation or the prior art description. Obviously, the drawings described below are only some implementations recorded in the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 It is a three-dimensional structural diagram of an oil and gas recovery gas-liquid separator in one embodiment of the utility model;

[0019] Figure 2 This is an internal structural diagram of an oil and gas recovery gas-liquid separator in one embodiment of the utility model;

[0020] Figure 3 This is an exploded structural diagram of an oil and gas recovery gas-liquid separator in one embodiment of the utility model;

[0021] Figure 4 This is a partial explosion structure diagram of an oil and gas recovery gas-liquid separator in one embodiment of the utility model;

[0022] Figure 5 This is a cross-sectional structural diagram of the valve body and the base in one embodiment of the utility model;

[0023] Figure 6 This is a cross-sectional structural diagram of an oil and gas recovery gas-liquid separator in a static state in one embodiment of the utility model;

[0024] Figure 7 It is a cross-sectional structural diagram of the oil and gas recovery gas-liquid separator in the discharge state in one embodiment of the utility model.

[0025] Explanation of main figure marks: 1. tank body, 101. liquid inlet pipe, 102. air outlet pipe, 103. liquid outlet pipe, 2. valve body assembly, 21. valve body, 22. base, 23. bottom cover, 201. first channel, 2011. liquid discharge section, 2012. middle section, 2013. liquid filling section, 2014. guide section, 202. second channel, 203. balance hole, 204. groove, 205. receiving groove, 3. valve core assembly, 31. valve core body, 32. rod body, 321. first rod body, 322. second rod body, 4. float, 401. socket, 5. pressing member, 51. plate part, 52. rod part, 6. protrusion, 601. connecting port, 7. limit member, 8. first sealing ring, 9. second sealing ring, 10. stop member. DETAILED DESCRIPTION

[0026] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the technical solutions in the implementation of the present invention will be clearly and completely described below in conjunction with the drawings in the implementation of the present invention. Obviously, the described implementation is only a part of the implementation of the present invention, not all of the implementations. Based on the implementation of the present invention, all other implementations obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0027] For traditional gas-liquid separators, when the interior is not pressurized, the internal air pressure is generally equal to the external atmospheric pressure. The downward pressure exerted by the liquid oil inside the valve core is relatively small. The downward pressure superimposed on the gravity of the valve core is less than the upward pulling force exerted by the float on the valve core. The float can easily drive the valve core upward, open the drainage channel of the gas-liquid separator, and discharge the liquid oil.

[0028] When the inside of a traditional gas-liquid separator is pressurized, the downward pressure exerted on the valve core by the liquid oil inside will increase significantly. When the downward pressure plus the gravity of the valve core is greater than or equal to the upward pulling force exerted by the float on the valve core, the float alone cannot drive the valve core upward, causing the valve core to block the drainage channel of the gas-liquid separator and prevent the liquid oil from being discharged.

[0029] For the above problems, refer to Figures 1 to 7As shown, an embodiment of the utility model provides an oil-gas recovery gas-liquid separator, which includes a tank body 1, a valve body assembly 2, a valve core assembly 3 and a float 4. The top of the tank body 1 is provided with a liquid inlet pipe 101 and an air outlet pipe 102, and the bottom is provided with a liquid outlet pipe 103. The valve body assembly 2 is at least partially arranged in the liquid outlet pipe 103, and the valve body assembly 2 is provided with a first channel 201, a second channel 202 and a balancing hole 203. The first channel 201 is arranged along the axial direction of the valve body assembly 2 and the top is connected to the internal space of the tank body 1 through the liquid outlet pipe 103. The bottom end of the first channel 201 is closed and is not connected to the space outside the tank body 1. One end of the second channel 202 is connected to the first channel 201 and the other end extends to the outer surface of the valve body assembly 2. One end of the balancing hole 203 is located at the top end surface of the valve body assembly 2, and the other end is connected to the bottom end of the first channel 201, which is used to balance the pressure at both ends of the first channel 201. The valve core assembly 3 includes a rod body 32 and a valve core body 31 circumferentially protruding from the rod body 32, the rod body 32 is at least partially located in the first channel 201, the valve core body 31 is located at the top of the first channel 201 and can move axially along the first channel 201 to close or open the first channel 201. The float 4 is arranged in the tank body 1 and is located at the top of the valve core body 31, and is connected to the rod body 32.

[0030] According to the above structural design, after the tank body 1 is pressurized, when the downward pressure exerted by the liquid oil in the tank body 1 on the valve core assembly 3 and the gravity of the valve core assembly 3 are superimposed to be greater than or equal to the pulling force exerted by the float 4 on the valve core assembly 3, the liquid oil in the tank body 1 can flow into the bottom end of the first channel 201 through the balance hole 203, and provide an upward thrust to the valve core assembly 3 from the bottom end of the valve core assembly 3. The upward thrust and the pulling force exerted by the float 4 on the valve core assembly 3 can offset the downward pressure on the valve core assembly 3 and the gravity of the valve core assembly 3, so that the float 4 can drive the valve core assembly 3 to move upward and drive the valve core body 31 away from the first channel 201. The liquid oil in the tank body 1 can flow through the first channel 201 and the second channel 202 in sequence to discharge the tank body 1, while the impurity gas in the tank body 1 flows out of the tank body 1 through the outlet pipe 102.

[0031] In addition, when the interior of the tank body 1 is not pressurized, the downward pressure exerted by the liquid oil at the top of the valve core assembly 3 on the valve core assembly 3 and the gravity of the valve core assembly 3 are not sufficient to offset the pulling force exerted by the float 4 on the valve core assembly 3. The float 4 alone can drive the valve core body 31 to move upward to open the first channel 201 and discharge the liquid oil from the tank body 1.

[0032] In one embodiment, the valve body assembly 2 can be configured as a split assembly structure. Figures 2 to 6As shown, the valve body assembly 2 includes a valve body 21, a base 22 and a bottom cover 23. The top end of the valve body 21 is arranged in the liquid outlet pipe 103, and the bottom end of the valve body 21 is provided with a mounting groove for inserting the base 22. The first channel 201 passes through the valve body 21 and the base 22. The balancing hole 203 passes through the valve body 21 in the axial direction of the valve body 21. The bottom cover 23 is sleeved on the bottom end of the valve body 21, and the bottom of the bottom cover 23 is closed.

[0033] In order to make the bottom end of the first channel 201 communicate with the balancing hole 203, a gap is provided between the bottom inner wall of the bottom cover 23 and the bottom wall of the valve body 21, and the first channel 201 and the balancing hole 203 are communicated through the gap.

[0034] The connection between the valve body 21 and the liquid outlet pipe 103 and between the valve body 21 and the bottom cover 23 includes, but is not limited to, threaded connection.

[0035] In one embodiment, reference Figures 5 to 7 As shown, the first channel 201 includes a discharge section 2011, an intermediate section 2012 and a filling section 2013 arranged from top to bottom, the discharge section 2011 and the intermediate section 2012 are located in the valve body 21, the filling section 2013 is located in the base 22, the circumferential size of the intermediate section 2012 is smaller than the circumferential size of the discharge section 2011 and the filling section 2013, a pressure piece 5 is provided in the filling section 2013, the rod body 32 passes through the discharge section 2011 and the intermediate section 2012 in sequence, and the bottom end extends into the filling section 2013, and the pressure piece 5 abuts against the bottom end of the rod body 32 in a floating state.

[0036] According to the above structural design, when the interior of the tank body 1 is pressurized, the liquid oil in the tank body 1 flows into the liquid filling section 2013 through the balance hole 203 and gradually fills its internal space. In this process, the liquid oil in the liquid filling section 2013 gradually drives the pressure piece 5 to move upward. When the pressure piece 5 contacts the bottom end of the rod body 32, under the action of the liquid oil, the pressure piece 5 provides an upward thrust to the rod body 32. The thrust is basically consistent with the pressure on the top of the rod body 32. Therefore, the external forces on both ends of the rod body 32 are basically balanced, and the rod body 32 and the valve core body 31 connected thereto can float quickly under the drive of the float 4.

[0037] Furthermore, to ensure that the pressure member 5 keeps a substantially horizontal posture and moves in the vertical direction, the first channel 201 further includes a guide section 2014 located in the base 22 and at the bottom of the liquid-filling section 2013, the circumferential dimension of the guide section 2014 is smaller than the circumferential dimension of the liquid-filling section 2013, and the pressure member 5 includes a coaxially connected plate portion 51 and a rod portion 52, the plate portion 51 is located in the liquid-filling section 2013, and the rod portion 52 is located in the guide section 2014. The circumferential dimension of the rod portion 52 is smaller than the circumferential dimension of the guide section 2014, that is, there is a certain gap between the rod portion 52 and the guide section 2014, ensuring that the liquid oil can flow into the liquid-filling section 2013 through the gap between the two.

[0038] When the bottom cover 23 is installed on the valve body 21 , it is considered that the bottom ends of the valve body 21 and the base 22 may be close to the bottom cover 23 , resulting in the bottom end of the balancing hole 203 being unable to communicate with the bottom end of the first through hole.

[0039] In order to solve the above problem, in one embodiment, referring to Figures 4 to 7 As shown, a protrusion 6 is provided at the bottom end of the base 22, the first channel 201 penetrates the protrusion 6, and a penetrating communication port 601 is provided on the circumference of the protrusion 6. After the bottom cover 23 is installed on the valve body 21, the protrusion 6 can abut against the bottom inner wall of the bottom cover 23 to prevent the bottom end of the base 22 from being closely attached to the bottom cover 23, so that there is a certain gap between the bottom end of the base 22 and the bottom cover 23, and the liquid oil in the gap can flow into the liquid filling section 2013 of the first channel 201 through the communication port 601 on the protrusion 6 to balance the pressure at both ends of the valve core assembly 3.

[0040] The float 4 and the rod body 32 can be connected in a movable manner. Figures 4 to 7 As shown, the float 4 is provided with an insertion hole 401 axially penetrating the float 4, the rod body 32 penetrates the insertion hole 401, and a stopper 10 is provided on the top of the rod body 32. The stopper 10 can be constructed as a plate-like structure, and the circumferential dimension of the stopper 10 is larger than the circumferential dimension of the insertion hole 401. The rod body 32 and the float 4 are two relatively independent components. When the inside of the tank body 1 is pressurized, the liquid oil enters the tank body 1 and immediately drives the float 4 to float, so that the float 4 is away from the top of the first channel 201, so that the top of the balance hole 203 is exposed, so that the liquid oil flows into the balance hole 203.

[0041] Further, in order to facilitate installation and disassembly, the rod body 32 can be set to a detachable structure. Specifically, the rod body 32 includes a first rod body 321 and a second rod body 322, the first rod body 321 is detachably connected to the bottom end of the second rod body 322, the stopper 10 is located at the top of the float 4, the second rod body 322 is at least partially located in the insertion hole 401 and the top end is connected to the stopper 10, and the valve core body 31 is arranged on the first rod body 321.

[0042] In one embodiment, reference Figure 5 and Figure 6 As shown, the top of the valve body 21 is provided with a groove 204 which is connected to the top of the first channel 201, and a limiter 7 is provided in the groove 204. The limiter 7 is located at the top of the valve core body 31 and is used to limit the distance that the top of the valve core body 31 moves toward the top, thereby limiting the valve core body 31 in the groove 204.

[0043] The limiting member 7 is provided with a first through hole and a second through hole which penetrates through the limiting member 7 , wherein the first through hole is for the rod body 32 to pass through, and the second through hole is for the liquid oil to flow through.

[0044] The limiter 7 can be set as a plate-like structure, which can be embedded in the side wall of the groove 204 along the circumferential direction, or a supporting structure such as a step can be set in the groove 204 to support the limiter 7, and a component such as a retaining spring that can fix the limiter 7 can be set on the top of the limiter 7.

[0045] After the liquid oil in the tank body 1 is completely discharged, some impurity gas may remain in the tank body 1 , and the impurity gas may flow into the first channel 201 and the second channel 202 through the gap between the valve core body 31 and the first channel 201 .

[0046] In one embodiment, to solve the above problem, refer to Figures 5 to 7 As shown, a receiving groove 205 is provided on one side of the first channel 201 close to the valve core body 31, and a first sealing ring 8 is provided in the receiving groove 205. In a static state, the valve core body 31 is at least partially in contact with the first sealing ring 8 to seal the top of the first channel 201 to prevent impurity gases from flowing into the second channel 202 through the drainage section 2011.

[0047] Furthermore, it is considered that the impurity gas remaining in the tank body 1 may also flow into the second channel 202 through the balance hole 203 .

[0048] To solve the above problems, refer to Figures 5 to 7 As shown, a second sealing ring 9 is provided at the bottom end of the liquid filling section 2013, and the bottom end and the outer side of the second sealing ring 9 are in contact with the inner wall of the liquid filling section 2013 to avoid a gap between the two. In addition, when there is no liquid oil in the tank body 1, the pressing member 5, under the action of its own gravity, presses the second sealing ring 9 from the top of the second sealing ring 9 with its plate portion 51 to seal the liquid filling section 2013.

[0049] Reference Figures 4 to 7 As shown, sealing rings may be provided at the connection between the valve body 21 and the liquid outlet pipe 103 , the connection between the valve body 21 and the bottom cover 23 , and the connection between the valve body 21 and the base 22 to improve the sealing properties of the respective connections.

[0050] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0051] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each implementation mode may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. An oil and gas recovery gas-liquid separator, characterized in that: include: The tank body (1) has a top end provided with a liquid inlet pipe (101) and an air outlet pipe (102), and a bottom end provided with a liquid outlet pipe (103); A valve body assembly (2) is at least partially arranged in the liquid outlet pipe (103); a first channel (201), a second channel (202) and a balancing hole (203) are arranged inside the valve body assembly (2); the first channel (201) is arranged along the axial direction of the valve body assembly (2) and the top end is connected to the internal space of the tank body (1); one end of the second channel (202) is connected to the first channel (201) and the other end extends to the outer surface of the valve body assembly (2); one end of the balancing hole (203) is located on the top end surface of the valve body assembly (2) and the other end is connected to the bottom end of the first channel (201); A valve core assembly (3), comprising a rod (32) and a valve core body (31) circumferentially protruding from the rod (32), wherein the rod (32) is at least partially located in the first channel (201), and the valve core body (31) is located at the top of the first channel (201) and is capable of axially moving along the first channel (201) to close or open the first channel (201); and The float (4) is arranged on the top of the valve core body (31) and is connected to the rod body (32).

2. The oil-gas recovery gas-liquid separator according to claim 1, characterized in that: The valve body assembly (2) comprises a valve body (21), a base (22) and a bottom cover (23); the top end of the valve body (21) is arranged in the liquid outlet pipe (103); the bottom end of the valve body (21) is provided with a mounting groove for inserting the base (22); the first channel (201) passes through the valve body (21) and the base (22); the balancing hole (203) passes through the valve body (21) in the axial direction of the valve body (21); the bottom cover (23) is sleeved on the bottom end of the valve body (21); and a gap is provided between the bottom inner wall of the bottom cover (23) and the bottom wall of the valve body (21); the gap is communicated with the bottom end of the first channel (201) and the bottom end of the balancing hole (203).

3. The oil-gas recovery gas-liquid separator according to claim 2, characterized in that: The first channel (201) comprises a liquid discharge section (2011), an intermediate section (2012) and a liquid filling section (2013) which are arranged in sequence from top to bottom; the liquid discharge section (2011) and the intermediate section (2012) are located in the valve body (21); the liquid filling section (2013) is located in the base (22); the circumferential dimension of the intermediate section (2012) is smaller than the circumferential dimensions of the liquid discharge section (2011) and the liquid filling section (2013); a pressure piece (5) is provided in the liquid filling section (2013); the bottom end of the rod body (32) extends into the liquid filling section (2013); and the pressure piece (5) abuts against the bottom end of the rod body (32) in a floating state.

4. The oil-gas recovery gas-liquid separator according to claim 3, characterized in that: The first channel (201) further comprises a guide section (2014) located inside the base (22) and at the bottom of the liquid-filling section (2013); the circumferential dimension of the guide section (2014) is smaller than the circumferential dimension of the liquid-filling section (2013); the pressure member (5) comprises a plate portion (51) and a rod portion (52) which are coaxially connected; the plate portion (51) is located inside the liquid-filling section (2013), and the rod portion (52) is located inside the guide section (2014).

5. The oil-gas recovery gas-liquid separator according to claim 2, characterized in that: The bottom end of the base (22) is provided with a protrusion (6) abutting against the bottom cover (23); the first channel (201) passes through the protrusion (6); and a connecting opening (601) is provided in the circumferential direction of the protrusion (6).

6. The oil-gas recovery gas-liquid separator according to claim 1, characterized in that: The float (4) is provided with a plug hole (401) axially penetrating the float (4), the rod body (32) penetrates the plug hole (401), a stopper (10) is provided at the top of the rod body (32), and the circumferential dimension of the stopper (10) is greater than the circumferential dimension of the plug hole (401).

7. The oil-gas recovery gas-liquid separator according to claim 6, characterized in that: The rod body (32) comprises a first rod body (321) and a second rod body (322); the first rod body (321) is detachably connected to the bottom end of the second rod body (322); the second rod body (322) is at least partially located in the insertion hole (401) and the top end is connected to the stopper (10); and the valve core body (31) is arranged on the first rod body (321).

8. The oil-gas recovery gas-liquid separator according to claim 2, characterized in that: The top end of the valve body (21) is provided with a groove (204) which is in communication with the top end of the first channel (201); a limiter (7) is provided in the groove (204); the limiter (7) is located at the top of the valve core body (31) and is used to limit the valve core body (31) in the groove (204).

9. The oil-gas recovery gas-liquid separator according to claim 1, characterized in that: A receiving groove (205) is provided on one side of the first channel (201) close to the valve core body (31), and a first sealing ring (8) is provided in the receiving groove (205). When the valve core body (31) is in a static state, at least part of it is in contact with the first sealing ring (8) to seal the top of the first channel (201).

10. The oil-gas recovery gas-liquid separator according to claim 4, characterized in that: A second sealing ring (9) is provided at the bottom end of the liquid filling section (2013), and the plate portion (51) of the pressing member (5) presses against the top of the second sealing ring (9) in a static state to seal the liquid filling section (2013).

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