Valve for oil gas recovery equipment

Abstract

The utility model discloses a valve for oil gas recovery equipment. The valve comprises a valve body, a first sealing ring, a second sealing ring, a valve element and a floater. The valve body comprises a first connecting part and a protruding part, a first sealing groove is formed in the side, close to the protruding part, of the first connecting part in the circumferential direction, a liquid drainage channel is formed in the valve body, one end of the liquid drainage channel is located on the top end face of the first connecting part, a second sealing groove is formed in the inner wall of the end, and the other end of the liquid drainage channel is located on the outer surface of the protruding part. The first sealing ring is arranged in the first sealing groove. And the second sealing ring is arranged in the second sealing groove. The valve element is arranged on the top of the valve body and right faces a channel opening of the liquid discharging channel. The floater is arranged at the top of the valve element and connected with the valve element. According to the valve for the oil gas recovery equipment in the embodiment, a gap between the valve body and the liquid drainage pipeline and a gap between the valve element and the liquid drainage channel can be sealed through the first sealing ring and the second sealing ring, and leakage of foreign gas and liquid oil is prevented.

Description

Technical Field

[0001] The utility model belongs to the technical field of oil and gas recovery, and in particular relates to a valve used for oil and gas recovery equipment. 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] The liquid oil in the existing oil and gas recovery equipment will inevitably be mixed with impurity gases, so the existing oil and gas recovery equipment is generally equipped with a gas-liquid separator to separate the liquid oil from the impurity gases. The gas-liquid separator of the oil and gas recovery equipment generally includes a tank body, a liquid inlet pipe and an exhaust pipe are arranged at the top of the tank body, and a liquid discharge pipe is arranged at the bottom. A valve is installed in the liquid discharge pipe, and the liquid oil is discharged by opening and closing the valve.

[0004] At present, most valves of oil and gas recovery equipment adopt float valves. The float floats up to drive the valve core to move upward, and then open the valve to discharge the liquid oil from the tank. However, the sealing performance of the current float valve is poor, especially at the connection between the float valve and the discharge pipe and around the valve core. The impurity gas and liquid oil in the tank can easily leak through the above parts.

[0005] 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

[0006] The utility model aims to provide a valve for oil and gas recovery equipment, which can seal the gap between the valve body and the drainage pipe and the gap between the valve core and the drainage channel through a first sealing ring on the outer surface of the valve body and a second sealing ring inside the valve body, so as to prevent leakage of impurity gas and liquid oil.

[0007] In order to achieve the above-mentioned purpose, a specific embodiment of the utility model provides a valve for oil and gas recovery equipment, including a valve body, a first sealing ring, a second sealing ring, a valve core and a float. The valve body includes a first connecting part and a protrusion arranged at the bottom end of the first connecting part, the circumferential size of the protrusion is larger than the circumferential size of the first connecting part, and a first sealing groove arranged circumferentially is provided on the side of the first connecting part close to the protrusion. A drainage channel is provided in the valve body, one end of the drainage channel is located at the top end surface of the first connecting part, and a second sealing groove is provided on the inner wall of the end, and the other end of the drainage channel is located on the outer surface of the protrusion. The first sealing ring is arranged in the first sealing groove. The second sealing ring is arranged in the second sealing groove. The valve core is arranged at the top of the valve body and is arranged opposite to the channel opening of the drainage channel, and is used to open or close the drainage channel. The float is arranged at the top of the valve core and connected to the valve core.

[0008] In one or more embodiments of the present invention, the first connecting portion is configured to be cylindrical and a thread is disposed on the circumferential outer surface thereof.

[0009] In one or more embodiments of the present invention, the discharge channel includes a joint port located at the top end of the valve body, the valve core includes a rod body and a valve core body protruding circumferentially from the rod body, the rod body at least partially extends to the bottom of the valve core body and extends into the joint port, the joint port and the valve core body are constructed to be tapered in a size decreasing from top to bottom, and the shape of the valve core body at least partially matches the shape of the joint port.

[0010] In one or more embodiments of the present invention, the second sealing groove is provided on the tapered side wall of the joint.

[0011] In one or more embodiments of the present invention, the horizontal cross-section of the protrusion is a polygon.

[0012] In one or more embodiments of the utility model, a balancing hole is provided in the valve body along the axial direction of the valve body, the top of the balancing hole is communicated with the top of the discharge channel, a mounting hole is provided at the bottom of the valve body and the mounting hole is provided with a base, a filling channel is provided in the base and axially arranged and communicated with the discharge channel, the top of the filling channel is communicated with the discharge channel, and the bottom is communicated with the bottom of the balancing hole, the valve core includes a rod body whose bottom end extends into the filling channel, a third sealing groove is provided on the circumferential outer surface of the base, and a third sealing ring is provided in the third sealing groove.

[0013] In one or more embodiments of the present invention, the third sealing groove is at least partially located in the mounting hole.

[0014] In one or more embodiments of the present invention, a pressure piece is provided in the liquid filling channel at the bottom of the rod body, a fourth sealing ring is provided at the bottom end of the liquid filling channel, and the pressure piece abuts against the fourth sealing ring in a static state.

[0015] In one or more embodiments of the present invention, the valve body also includes a second connecting portion arranged at the bottom end of the protrusion, the circumferential dimension of the second connecting portion is smaller than the circumferential dimension of the protrusion, a fifth sealing groove is provided on the outer surface of the second connecting portion near the protrusion, a fifth sealing ring is provided in the fifth sealing groove, the bottom end of the balancing hole is located at the bottom end surface of the valve body, the valve of the oil and gas recovery equipment also includes a bottom cover arranged at the bottom of the second connecting portion, a gap is provided between the bottom wall of the bottom cover and the bottom wall of the valve body, and the fifth sealing ring is located in the bottom cover.

[0016] In one or more embodiments of the present invention, the circumferential inner surface of the second connection portion and the bottom cover are both configured as a cylinder, and the circumferential outer surface of the second connection portion and the circumferential inner surface of the bottom cover are both provided with threads.

[0017] Compared with the prior art, after the valve for oil and gas recovery equipment of the utility model is installed in the discharge pipe of the oil and gas recovery equipment, the first sealing ring arranged on the outer surface of the valve body can seal the gap between the valve body and the discharge pipe, preventing liquid oil from flowing out through the gap between the valve body and the discharge pipe, thereby avoiding liquid oil leakage.

[0018] Moreover, after the liquid oil is completely discharged from the oil and gas recovery equipment, the first sealing ring and the second sealing ring can seal the gap between the valve body and the discharge pipe and the gap between the valve core and the discharge channel to prevent the impurity gas remaining in the oil and gas recovery equipment from leaking from the bottom end of the oil and gas recovery equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] 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.

[0020] Figure 1 This is a three-dimensional structural diagram of a valve used for oil and gas recovery equipment in one embodiment of the utility model;

[0021] Figure 2 This is an exploded structural diagram of a valve used for oil and gas recovery equipment in one embodiment of the utility model;

[0022] Figure 3 It is a partial exploded view of a valve used for oil and gas recovery equipment in one embodiment of the utility model;

[0023] Figure 4 This is an exploded structural diagram of the valve body and the bottom cover in one embodiment of the utility model;

[0024] Figure 5This is a cross-sectional structural diagram of a valve body in one embodiment of the utility model;

[0025] Figure 6 The utility model is a cross-sectional structural diagram of a valve used for oil and gas recovery equipment in one embodiment.

[0026] Explanation of main figure marks: 1. valve body, 11. first connecting part, 12. protrusion, 13. second connecting part, 101. first sealing groove, 102. drainage channel, 1021. joint, 103. second sealing groove, 104. balance hole, 105. mounting hole, 106. fifth sealing groove, 2. first sealing ring, 3. second sealing ring, 4. valve core, 41. valve core body, 42. rod body, 5. float, 6. base, 601. filling channel, 602. third sealing groove, 7. third sealing ring, 8. pressing member, 9. fourth sealing ring, 10. fifth sealing ring, 14. bottom cover. DETAILED DESCRIPTION

[0027] 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.

[0028] Reference Figures 1 to 6 As shown, an embodiment of the utility model provides a valve for oil and gas recovery equipment, including a valve body 1, a first sealing ring 2, a second sealing ring 3, a valve core 4 and a float 5. The valve body 1 includes a first connecting portion 11 and a protruding portion 12, the protruding portion 12 is arranged at the bottom end of the first connecting portion 11, and the circumferential dimension of the protruding portion 12 is larger than the circumferential dimension of the first connecting portion 11. A first sealing groove 101 arranged circumferentially is provided on one side of the first connecting portion 11 close to the protruding portion 12. A discharge channel 102 is provided in the valve body 1, one end of the discharge channel 102 is located at the top end surface of the first connecting portion 11, and a second sealing groove 103 is provided on the inner wall of the end, and the other end of the discharge channel 102 is located on the outer surface of the protruding portion 12. The first sealing ring 2 is arranged in the first sealing groove 101. The second sealing ring 3 is arranged in the second sealing groove 103. The valve core 4 is arranged at the top of the valve body 1 and is arranged opposite to the channel opening of the discharge channel 102, and is used to open or close the discharge channel 102. The float 5 is arranged on the top of the valve core 4 and is fixedly connected to the valve core 4 .

[0029] According to the above structural design, the first connecting portion 11 of the valve body 1 is used to connect to the drain pipe of the oil and gas recovery equipment, and the drain pipe is generally arranged at the bottom end of the oil and gas recovery equipment.

[0030] After the liquid oil containing impurity gas is injected into the oil and gas recovery equipment, the impurity gas is separated from the liquid oil inside the oil and gas recovery equipment. The impurity gas is discharged through the exhaust pipe at the top of the oil and gas recovery equipment, and the liquid oil accumulates at the bottom of the oil and gas recovery equipment, driving the float 5 to move upward, and then driving the valve core 4 to move upward and open the drainage channel 102, so that the liquid oil can be smoothly discharged from the oil and gas recovery equipment through the drainage channel 102.

[0031] In the above process of discharging liquid oil, the first sealing ring 2 arranged on the outer surface of the valve body 1 can seal the gap between the valve body 1 and the discharge pipe to prevent the liquid oil from flowing out through the gap between the valve body 1 and the discharge pipe, thereby avoiding leakage of the liquid oil.

[0032] Moreover, after the liquid oil is completely discharged from the oil and gas recovery equipment, the first sealing ring 2 and the second sealing ring 3 can seal the gap between the valve body 1 and the drain pipe and the gap between the valve core 4 and the drain channel 102 to prevent the impurity gas remaining in the oil and gas recovery equipment from leaking from the bottom end of the oil and gas recovery equipment.

[0033] In order to ensure the stability and airtightness of the connection between the valve body 1 and the drain pipe of the oil and gas recovery equipment, in one embodiment, a threaded connection can be adopted between the first connection part 11 and the drain pipe. Specifically, the first connection part 11 and the drain pipe of the oil and gas recovery equipment are both constructed as cylinders, and matching threads are provided on the circumferential outer surface of the first connection part 11 and the inner surface of the drain pipe.

[0034] In one embodiment, reference Figure 5 and Figure 6 As shown, the discharge channel 102 includes a joint port 1021 located at the top end of the valve body 1, and the valve core 4 includes a rod body 42 and a valve core body 41 circumferentially protruding from the rod body 42, and the rod body 42 at least partially extends to the bottom of the valve core body 41 and extends into the joint port 1021, and the joint port 1021 and the valve core body 41 are constructed to be tapered in a size decreasing from top to bottom, and the shape of the valve core body 41 at least partially matches the shape of the joint port 1021.

[0035] Preferably, the connecting opening 1021 may be configured in a truncated cone shape, and the valve core body 41 may be configured in a truncated cone shape or a conical shape.

[0036] In order to ensure the sealing effect of the second sealing ring 3 on the drainage channel 102 , the second sealing ring 3 should be arranged as close to the joint 1021 as possible.

[0037] Preferably, refer to Figure 5As shown, the second sealing groove 103 is arranged on the tapered side wall of the joint 1021. After the second sealing ring 3 is installed in the second sealing groove 103, its inner part relatively protrudes from the second sealing groove 103, so that the second sealing ring 3 contacts the valve core body 41 to seal the discharge channel 102.

[0038] When installing and removing the valve body 1, in order to facilitate the operator to twist the valve body 1, the horizontal cross-sectional shape of the protrusion 12 can be set to a polygon. Figure 3 As shown, the horizontal cross-sectional shape of the protrusion 12 can be set to be a regular hexagon.

[0039] Considering that the inside of the oil and gas recovery equipment is generally pressurized, the air pressure inside the oil and gas recovery equipment is relatively high. After the air pressure is applied to the liquid oil, it is difficult for the float 5 to drive the valve core 4 to move upward, resulting in the inability to discharge the liquid oil.

[0040] To solve the above problem, in one embodiment, referring to Figure 5 and Figure 6 As shown, a balancing hole 104 is provided in the valve body 1 along the axial direction of the valve body 1, and the top of the balancing hole 104 is connected to the top of the discharge channel 102. A mounting hole 105 connected to the discharge channel 102 is provided at the bottom of the valve body 1, and a base 6 is provided in the mounting hole 105. A filling channel 601 is provided in the base 6 and is axially arranged and connected to the discharge channel 102. The top of the filling channel 601 is connected to the discharge channel 102, and the bottom is connected to the bottom of the balancing hole 104. The valve core 4 includes a rod body 42, and the bottom end of the rod body 42 extends into the filling channel 601. The balancing hole 104 is used to transport liquid oil to the discharge channel 102, so that the liquid oil can flow to the bottom end of the valve core 4 through the discharge channel 102, and provide an upward thrust to the valve core 4 to offset the downward pressure caused by the increase in air pressure, so that the float 5 can smoothly drive the valve core 4 to move upward and open the discharge channel 102.

[0041] Based on the above structural design, in order to prevent liquid oil from flowing out from the gap between the base 6 and the mounting hole 105, a third sealing groove 602 is set on the circumferential outer surface of the base 6, and a third sealing ring 7 is installed in the third sealing groove 602 to seal the gap between the base 6 and the mounting hole 105.

[0042] Furthermore, to improve the sealing effect of the third sealing ring 7, the third sealing groove 602 is at least partially located in the mounting hole 105, so that the outer ring of the third sealing ring 7 fits the hole wall of the mounting hole 105 as much as possible to ensure its own sealing effect.

[0043] In one embodiment, reference Figure 5 and Figure 6As shown, a pressure piece 8 located at the bottom of the rod body 42 is provided in the liquid filling channel 601, and a fourth sealing ring 9 is provided at the bottom end of the liquid filling channel 601. The pressure piece 8 abuts against the fourth sealing ring 9 in a static state to seal the gap between the pressure piece 8 and the liquid filling channel 601 to prevent the impurity gas remaining in the oil and gas recovery equipment from leaking through the gap between the pressure piece 8 and the liquid filling channel 601.

[0044] Reference Figures 1 to 5 As shown, the valve body 1 also includes a second connecting portion 13 arranged at the bottom end of the protrusion 12, the circumferential size of the second connecting portion 13 is smaller than the circumferential size of the protrusion 12, and the outer surface of the second connecting portion 13 close to the protrusion 12 is provided with a fifth sealing groove 106, and a fifth sealing ring 10 is arranged in the fifth sealing groove 106. The bottom end of the balancing hole 104 is located at the bottom end surface of the valve body 1, and the valve of the oil and gas recovery equipment also includes a bottom cover 14 sleeved on the bottom of the second connecting portion 13, and a gap is provided between the bottom wall of the bottom cover 14 and the bottom wall of the valve body 1, and the fifth sealing ring 10 is located in the bottom cover 14 to seal the gap between the second connecting portion 13 and the bottom cover 14 to prevent liquid oil or impurity gas from leaking through the gap between the second connecting portion 13 and the bottom cover 14.

[0045] Furthermore, in order to facilitate the connection between the second connection part 13 and the bottom cover 14, the circumferential inner surfaces of the second connection part 13 and the bottom cover 14 are both constructed as a cylinder, and the circumferential outer surface of the second connection part 13 and the circumferential inner surface of the bottom cover 14 are both provided with matching threads.

[0046] 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.

[0047] 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. A valve for oil and gas recovery equipment, characterized in that: include: A valve body (1), comprising a first connecting portion (11) and a protruding portion (12) arranged at the bottom end of the first connecting portion (11), wherein the circumferential dimension of the protruding portion (12) is greater than the circumferential dimension of the first connecting portion (11), a first sealing groove (101) arranged circumferentially is provided on one side of the first connecting portion (11) close to the protruding portion (12), a liquid discharge channel (102) is provided in the valve body (1), one end of the liquid discharge channel (102) is located at the top end surface of the first connecting portion (11), and a second sealing groove (103) is provided on the inner wall of the end, and the other end of the liquid discharge channel (102) is located on the outer surface of the protruding portion (12); A first sealing ring (2), arranged in the first sealing groove (101); A second sealing ring (3), arranged in the second sealing groove (103); A valve core (4) is arranged at the top of the valve body (1) and facing the channel opening of the liquid discharge channel (102), and is used to open or close the liquid discharge channel (102); and A float (5) is arranged on the top of the valve core (4) and is connected to the valve core (4).

2. The valve for oil and gas recovery equipment according to claim 1, characterized in that: The first connecting portion (11) is cylindrical and has a circumferential outer surface provided with threads.

3. The valve for oil and gas recovery equipment according to claim 1, characterized in that: The discharge channel (102) includes a joint (1021) located at the top end of the valve body (1); the valve core (4) includes a rod body (42) and a valve core body (41) circumferentially protruding from the rod body (42); the rod body (42) at least partially extends to the bottom of the valve core body (41) and extends into the joint (1021); the joint (1021) and the valve core body (41) are constructed to be tapered in a manner that their sizes decrease from top to bottom; the shape of the valve core body (41) at least partially matches the shape of the joint (1021).

4. The valve for oil and gas recovery equipment according to claim 3, characterized in that: The second sealing groove (103) is arranged on the tapered side wall of the joint (1021).

5. The valve for oil and gas recovery equipment according to claim 1, characterized in that: The horizontal cross-section of the protrusion (12) is in the shape of a polygon.

6. The valve for oil and gas recovery equipment according to claim 1, characterized in that: The valve body (1) is provided with a balancing hole (104) arranged axially along the valve body (1), the top end of the balancing hole (104) is communicated with the top end of the discharge channel (102), the bottom end of the valve body (1) is provided with a mounting hole (105) communicated with the discharge channel (102), the mounting hole (105) is provided with a base (6), the base (6) is provided with a filling channel (601) arranged axially and communicated with the discharge channel (102), the top end of the filling channel (601) is communicated with the discharge channel (102), and the bottom end is communicated with the bottom end of the balancing hole (104), the valve core (4) includes a rod body (42) whose bottom end extends into the filling channel (601), the circumferential outer surface of the base (6) is provided with a third sealing groove (602), and the third sealing ring (7) is provided in the third sealing groove (602).

7. The valve for oil and gas recovery equipment according to claim 6, characterized in that: The third sealing groove (602) is at least partially located in the mounting hole (105).

8. The valve for oil and gas recovery equipment according to claim 6, characterized in that: The liquid filling channel (601) is provided with a pressing member (8) located at the bottom of the rod body (42), and the bottom end of the liquid filling channel (601) is provided with a fourth sealing ring (9), and the pressing member (8) abuts against the fourth sealing ring (9) in a static state.

9. The valve for oil and gas recovery equipment according to claim 6, characterized in that: The valve body (1) further comprises a second connecting portion (13) arranged at the bottom end of the protruding portion (12); the circumferential dimension of the second connecting portion (13) is smaller than the circumferential dimension of the protruding portion (12); a fifth sealing groove (106) is arranged on the outer surface of the second connecting portion (13) close to the protruding portion (12); a fifth sealing ring (10) is arranged in the fifth sealing groove (106); the bottom end of the balancing hole (104) is located at the bottom end surface of the valve body (1); the valve of the oil and gas recovery equipment further comprises a bottom cover (14) sleeved on the bottom of the second connecting portion (13); a gap is provided between the bottom wall of the bottom cover (14) and the bottom wall of the valve body (1); and the fifth sealing ring (10) is located in the bottom cover (14).

10. The valve for oil and gas recovery equipment according to claim 9, characterized in that: The circumferential inner surfaces of the second connecting portion (13) and the bottom cover (14) are both cylindrical, and the circumferential outer surface of the second connecting portion (13) and the circumferential inner surface of the bottom cover (14) are both provided with threads.

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