Oil gas recovery valve with external air cylinder

Abstract

The oil gas recovery valve comprises a valve body, an air cylinder body and a shaft, the valve body is of a transverse through type structure, two ends of the valve body are open, one port of the valve body is a discharging port, a feeding port is formed in the bottom of the valve body, and a sealing plate is arranged in the valve body; the air cylinder body is installed at the end, away from the discharging port, of the valve body, an air port is formed in the air cylinder body, and a piston is arranged in the air cylinder body. The shaft is arranged in the valve body, one end of the shaft is connected with the sealing plate, the other end of the shaft extends into the air cylinder body and is connected with the piston, and the shaft is sleeved with a spring located on the inner side of the sealing plate. The internal space of the air cylinder body can be effectively increased, so that the acting force generated when the piston moves, namely the sealing plate is opened is improved, the opening effect of the valve is effectively guaranteed, and safety accidents caused by the fact that the valve cannot be opened are avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of oil and gas recovery valves for tanker trucks, and particularly relates to an oil and gas recovery valve with an external cylinder. Background Art

[0002] The existing oil and gas recovery valves on tanker trucks are generally L-shaped valves. For example, the oil and gas recovery valve disclosed in the Chinese utility model with the publication number CN207243453U has its feed inlet facing downward and is installed on the assembly pipeline at the top of the tank body, and the discharge outlet faces one side. When in use, air is filled into the inner cavity (piston cavity) of the valve body through an air pipe joint, and the piston in the inner cavity of the valve body is pushed downward by air pressure. Then, the sealing plate at the feed inlet is pushed downward through the shaft connecting the piston, so as to open the valve.

[0003] The opening of such an oil and gas recovery valve is determined by the pressure difference between the pressure in the piston cavity inside the valve body and the pressure inside the tank body, which are in the same straight line and in opposite directions. The movement of the sealing plate is affected by the air pressure inside the tank body. Since the piston cavity inside the valve body is located inside the valve and has limited space and small acting force, it is very easy to have insufficient opening force when the pressure inside the tank body is large, which will directly lead to the situation where the sealing plate cannot be opened. If the above situation occurs when filling oil into the tank body, it is very easy to cause safety accidents. Summary of the Utility Model

[0004] The purpose of the utility model is to provide an oil and gas recovery valve with an external cylinder to solve the problem of difficult valve opening.

[0005] The oil and gas recovery valve with an external cylinder of the utility model is realized as follows:

[0006] An oil and gas recovery valve with an external cylinder includes

[0007] a valve body, which is a horizontally penetrating structure with both ends open and one end as the discharge outlet. The bottom of the valve body is provided with a feed inlet, and a sealing plate is arranged inside the valve body;

[0008] a cylinder block, which is installed at one end of the valve body away from the discharge outlet. An air port is arranged on the cylinder block, and a piston is arranged inside the cylinder block;

[0009] a shaft, which is arranged inside the valve body. One end of the shaft is connected to the sealing plate, and the other end extends into the cylinder block and is connected to the piston. A spring is sleeved on the shaft and is located inside the sealing plate.

[0010] Further, the air port is located on the side of the piston facing the valve body;

[0011] An air pipe joint is installed on the air port.

[0012] Furthermore, a step facing the valve body is provided on the end plate where the cylinder block mates with the valve body. A boss is provided on the inner side of the sealing plate, and both ends of the spring are respectively assembled on the step and outside the boss.

[0013] Furthermore, a sealing cavity for the shaft to pass through is provided on the end plate where the cylinder block mates with the valve body, and an O-ring I and a spacer ring are installed in the sealing cavity.

[0014] Furthermore, both ends of the shaft are detachably connected to the sealing plate and the piston respectively;

[0015] The cylinder block and the valve body are detachably connected.

[0016] Furthermore, an annular inclined surface matching the outer ring surface of the sealing plate is provided on the inner side of the discharge port, and a sealing ring I is installed on the outer ring of the sealing plate.

[0017] Furthermore, a detachable cylinder head is provided at one end of the cylinder block away from the valve body.

[0018] Furthermore, a flat-headed silencer is installed on the cylinder block.

[0019] Furthermore, an annular groove is provided on the inner wall of the discharge port.

[0020] Furthermore, flange plates are respectively provided at the outer ends of the discharge port and the feed port.

[0021] After adopting the above technical solutions, the beneficial effects of the present utility model are as follows:

[0022] (1) The present utility model adopts a horizontal valve body structure, and the feed port is located on the side of the valve body. The pressure inside the tank body and the force received when the sealing plate is opened are not on the same straight line. And when closing the valve, the pressure inside the tank can assist in closing the sealing plate, thereby improving the sealing performance of the valve body;

[0023] (2) The present utility model adopts a separate and externally installed cylinder block structure, which can effectively increase the internal space of the cylinder block to improve the acting force when the piston moves, that is, when the sealing plate is opened, thus effectively ensuring the opening effect of the valve and avoiding safety accidents caused by the inability to open the valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The following further describes the present utility model in conjunction with the drawings and embodiments.

[0025] Figure 1 It is a structural diagram of the first perspective of the externally mounted cylinder type oil and gas recovery valve of the present utility model in a preferred embodiment;

[0026] Figure 2It is a structural diagram of the second perspective of the cylinder-external oil and gas recovery valve according to the preferred embodiment of the present utility model;

[0027] Figure 3 It is the front view of the cylinder-external oil and gas recovery valve according to the preferred embodiment of the present utility model;

[0028] Figure 4 It is Figure 3 the sectional view in the A-A direction in

[0029] Figure 5 It is Figure 4 the enlarged view of part C in

[0030] Figure 6 It is Figure 4 the enlarged view of part D in

[0031] Figure 7 It is Figure 3 the sectional view in the B-B direction in

[0032] In the figure: valve body 1, cylinder block 2, shaft 3, discharge port 4, feed port 5, sealing plate 6, piston 7, spring 8, air port 9, end plate 10, pipe joint 11, step 12, boss 13, sealing cavity 14, O-ring I 15, spacer ring 16, sealing ring II 17, wear-resistant ring 18, bolt I 19, washer 20, bolt II 21, O-ring II 22, bolt III 23, annular inclined surface 24, sealing ring I 25, cylinder head 26, bolt IV 27, flat head silencer 28, sound-absorbing hole 29, annular groove 30, flange plate I 31, flange plate II 32, sealing ring III 33. Specific embodiments

[0033] To make the purpose, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments of the cylinder-external type obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present utility model.

[0034] Therefore, the detailed description of the embodiments of the present utility model provided in the accompanying drawings is not intended to limit the scope of the claimed present utility model, but merely represents the selected embodiments of the present utility model. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present utility model.

[0035] As Figure 1-7As shown in the figure, an external-cylinder oil-gas recovery valve includes a valve body 1, a cylinder body 2, and a shaft 3. The valve body 1 has a horizontally penetrating structure with both ends open and one end being the discharge port 4. The bottom of the valve body 1 is provided with a feed port 5, and a sealing plate 6 is arranged inside the valve body 1; the cylinder body 2 is installed at one end of the valve body 1 away from the discharge port 4. An air port 9 is arranged on the cylinder body 2, and a piston 7 is arranged inside the cylinder body 2; the shaft 3 is arranged inside the valve body 1. One end of the shaft 3 is connected to the sealing plate 6, and the other end extends into the cylinder body 2 and is connected to the piston 7. A spring 8 is sleeved on the shaft 3 and is located inside the sealing plate 6.

[0036] When the air source is connected and the cylinder body 2 is inflated, in order to be able to drive the sealing plate 6 to move towards the direction where the cylinder body 2 is located by the movement of the piston 7 to open the valve, the air port 9 is located on the side of the piston 7 facing the valve body 1.

[0037] Specifically, the air port 9 is arranged at the end plate 10 where the cylinder body 2 cooperates with the valve body 1. After the air source is connected, the gas will enter the inner cavity of the cylinder body 2 on the side of the piston 7 facing the valve body 1, so as to use the air pressure to push the piston 7 to move towards the end away from the valve body 1, and then drive the sealing plate 6 to move towards the direction where the cylinder body 2 is located through the shaft 3, so as to achieve the effect of opening the valve.

[0038] In order to facilitate the connection of the air source, an air pipe joint 11 is installed on the air port 9.

[0039] The setting of the spring 8 is for the convenience of closing the valve, that is, when the valve needs to be closed, the air source is disconnected. At this time, the pressure in the inner cavity of the cylinder body 2 on the side of the piston 7 facing the valve body 1 decreases, and the elastic force of the spring 8 can push the sealing plate 6 to move towards the discharge port 4 side, and then close the valve.

[0040] In order to prevent the spring 8 from moving randomly, a step 12 facing the valve body 1 direction is arranged on the end plate 10 where the cylinder body 2 cooperates with the valve body 1, and a boss 13 is arranged inside the sealing plate 6. The two ends of the spring 8 are respectively assembled on the step 12 and outside the boss 13.

[0041] Among them, the end of the spring 8 facing the sealing plate 6 is sleeved outside the boss 13, and the end of the spring 8 facing the cylinder body 2 is assembled on the step 12.

[0042] In order to ensure the sealing performance between the cylinder body 2 and the shaft 3, a sealing cavity 14 for the shaft 3 to pass through is arranged on the end plate 10 where the cylinder body 2 cooperates with the valve body 1, and an O-ring Ⅰ 15 and a spacer 16 are installed in the sealing cavity 14.

[0043] Specifically, both the O-ring Ⅰ 15 and the spacer 16 are sleeved on the shaft 3, and the O-ring Ⅰ 15 is assembled between two adjacent spacers 16 to ensure the sealing performance of the cooperation between the shaft 3 and the end plate 10, so as to ensure the sealing performance of the inner cavity of the cylinder body 2 on the side of the piston 7 facing the valve body 1 and avoid the problem of valve opening failure caused by air leakage.

[0044] Preferably, the O-ring I 15 is a coated O-ring, which can improve its anti-corrosion and durability.

[0045] Preferably, a seal ring II 17 and a wear-resistant ring 18 are installed on the outer ring of the piston 7 to ensure the sealing and stability between the piston 7 and the inner wall of the cylinder block 2 and extend the service life of the piston 7.

[0046] To facilitate the disassembly and assembly between the shaft 3, the sealing plate 6 and the piston 7, both ends of the shaft 3 are detachably connected to the sealing plate 6 and the piston 7 respectively.

[0047] In this embodiment, one end of the shaft 3 facing the sealing plate 6 uses a bolt I 19 passing through the sealing plate 6 to connect the sealing plate 6 and the shaft 3, and a washer 20 is arranged between the end of the shaft 3 and the sealing plate 6.

[0048] One end of the shaft 3 facing the cylinder block 2 is assembled in the mounting hole of the piston 7 and is connected to the shaft 3 by a bolt II 21 passing through the piston 7.

[0049] Preferably, an O-ring II 22 is assembled between the shaft 3 and the mounting hole of the piston 7 to ensure the sealing between the two.

[0050] To achieve the assembly between the cylinder block 2 and the valve body 1, the cylinder block 2 and the valve body 1 are detachably connected.

[0051] In this embodiment, the cylinder block 2 is connected to the valve body 1 by a bolt III 23.

[0052] The cylinder block 2 and the valve body 1 are connected in a detachable manner, which is not only convenient for disassembly and assembly, but also convenient to replace the cylinder block 2 with different inner cavities according to needs to ensure the normal opening of the valve.

[0053] To ensure the sealing effect when the valve is closed, an annular inclined surface 24 matching the outer ring surface of the sealing plate 6 is arranged inside the discharge port 4, and a seal ring I 25 is installed on the outer ring of the sealing plate 6.

[0054] An annular sealing groove is installed on the periphery of the sealing plate 6, and the seal ring I 25 is assembled in the annular sealing groove. When the valve is closed, the seal ring I 25 fits against the annular inclined surface 24 to ensure the sealing effect when the valve is closed.

[0055] To facilitate the installation of the piston 7, a detachable cylinder head 26 is provided at one end of the cylinder block 2 away from the valve body 1.

[0056] In this embodiment, the cylinder block 2 and the cylinder head 26 are connected by a bolt IV 27.

[0057] Preferably, a seal ring III 33 is arranged between the cylinder head 26 and the cylinder block 2.

[0058] In order to eliminate the noise generated when the gas is discharged from the cylinder block 2, a flat muffler 28 is installed on the cylinder block 2.

[0059] Specifically, a sound-absorbing hole 29 is provided at one end of the cylinder block 2 close to the cylinder head 26, and the flat muffler 28 is installed in the sound-absorbing hole 29.

[0060] When the piston 7 moves in the direction away from the valve body 1 under the action of air pressure, the gas in the inner cavity of the cylinder block 2 on the side of the piston 7 facing the cylinder head 26 will be discharged from the sound-absorbing hole 29, and the flat muffler 28 can eliminate the noise generated when the gas is discharged.

[0061] In order to facilitate the installation of the filter screen, an annular groove 30 is provided on the inner wall of the discharge port 4.

[0062] The filter screen can effectively filter out the particulate impurities in the oil and gas.

[0063] In order to facilitate the connection with the tank body and the external oil and gas collection pipeline, flange plates are respectively provided at the outer ends of the discharge port 4 and the feed port 5.

[0064] The flange plate I 31 on the feed port 5 is connected to the flange on the pipeline at the top of the tank body, and the flange plate II 32 at the discharge port 4 is used to connect the oil and gas collection pipeline. When collecting oil and gas, the valve is opened, and the oil and gas can enter the oil and gas collection pipeline through the valve.

[0065] When loading and unloading oil to the tank body on the tanker, the air source is connected, and the gas enters the inner cavity of the cylinder block 2 on the side of the piston 7 facing the valve body 1. The air pressure then pushes the piston 7 to move towards the end away from the valve body 1, and then drives the sealing plate 6 to move synchronously by the shaft 3, while compressing the spring 8 on the shaft 3, thus opening the valve, enabling the oil and gas to enter the valve body 1 from the feed port 5 and flow out from the discharge port 4. After completing the loading and unloading of oil, the air source is disconnected, and under the action of the spring 8, the piston 7 and the sealing plate 6 are reset, thereby closing the valve. At this time, the air pressure in the tank body is inside the sealing plate 6, which can further improve the sealing performance of the valve when it is closed.

[0066] Taking the above ideal embodiments based on the present invention as an inspiration, through the above description, relevant staff can completely make various changes and modifications within the scope not deviating from the technical idea of this invention. The technical scope of this invention is not limited to the content in the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. An externally mounted cylinder type oil and gas recovery valve, characterized in that, including a valve body (1) which has a horizontally penetrating structure with both ends open and one end being the discharge port (4), a feed port (5) is provided at the bottom of the valve body (1), and a sealing plate (6) is arranged inside the valve body (1); a cylinder block (2) which is installed at one end of the valve body (1) away from the discharge port (4), an air port (9) is provided on the cylinder block (2), and a piston (7) is arranged inside the cylinder block (2); a shaft (3) which is arranged inside the valve body (1), one end of the shaft (3) is connected to the sealing plate (6), the other end extends into the cylinder block (2) and is connected to the piston (7), and a spring (8) is sleeved on the shaft (3) inside the sealing plate (6).

2. The cylinder external type oil and gas recovery valve according to claim 1, wherein The air port (9) is located on the side of the piston (7) facing the valve body (1); A pipe joint (11) is installed on the air port (9).

3. The external-cylinder type oil-gas recovery valve according to claim 1, wherein A step (12) facing the valve body (1) direction is provided on the end plate (10) of the cylinder block (2) cooperating with the valve body (1), a boss (13) is arranged inside the sealing plate (6), and both ends of the spring (8) are respectively assembled on the step (12) and outside the boss (13).

4. The cylinder external type oil and gas recovery valve according to claim 1, characterized in that, A sealing cavity (14) for the shaft (3) to pass through is provided on the end plate (10) of the cylinder block (2) cooperating with the valve body (1), and an O-ring I (15) and a spacer ring (16) are installed inside the sealing cavity (14).

5. The external cylinder type oil and gas recovery valve according to claim 1, characterized in that, Both ends of the shaft (3) are detachably connected to the sealing plate (6) and the piston (7) respectively; The cylinder block (2) and the valve body (1) are detachably connected.

6. The cylinder external type oil and gas recovery valve according to claim 1, characterized in that, An annular inclined surface (24) cooperating with the outer ring surface of the sealing plate (6) is provided inside the discharge port (4), and a sealing ring I (25) is installed on the outer ring of the sealing plate (6).

7. The cylinder external type oil and gas recovery valve according to claim 1, characterized in that, A detachable cylinder head (26) is provided at one end of the cylinder block (2) away from the valve body (1).

8. The external cylinder type oil and gas recovery valve according to claim 1, characterized in that A flat head muffler (28) is installed on the cylinder block (2).

9. The external cylinder type oil and gas recovery valve according to claim 1, wherein An annular groove (30) is provided on the inner wall of the discharge port (4).

10. The cylinder external type oil and gas recovery valve according to claim 1, characterized in that, Flange plates are respectively provided at the outer ends of the discharge port (4) and the feed port (5).

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