One-way valve for ultrahigh-pressure coupling liquid extraction

Abstract

The utility model discloses an ultrahigh pressure coupling liquid extraction one-way valve which comprises a valve body, a first cavity is arranged at the bottom end of the valve body, a second cavity is arranged at the top end of the valve body, and the first cavity is connected with the second cavity through a third cavity. A control oil port is formed in the side wall of the first cavity corresponding to the bottom surface of the piston, an oil passing port is formed in the top end of the second cavity, and a bidirectional oil port is formed in the side wall of the third cavity; a piston is arranged in the first cavity in a sliding mode, a valve rod is arranged in the third cavity in a sliding mode, and the top end of the valve rod extends into the second cavity and is provided with a wedge-shaped plug. The bottom end of the valve rod is connected with the top of the piston through a first elastic piece. A second elastic piece is arranged at the top end of the valve rod. Under the normal condition, the valve can be used as a one-way valve to limit oil liquid to flow in a single direction; when oil in working equipment needs to flow reversely in time in emergency, the oil return valve can be switched to be used as a return valve, and it is guaranteed that the oil in the working equipment can flow reversely in time.

Description

Technical Field

[0001] The utility model belongs to the technical field of high-pressure one-way valves and relates to an ultra-high-pressure coupled liquid extraction one-way valve. Background Art

[0002] The existing one-way valve is a valve that controls the flow of fluid in only one direction. Its principle is to control the flow direction of the liquid through a wedge-shaped plug with a specific orientation inside it, so that the fluid cannot flow back. However, in an ultra-high pressure working environment, in order to ensure the safe operation of the working equipment connected to the output end of the one-way valve, it is sometimes necessary to allow the oil medium in the working equipment to flow in the reverse direction, and the existing one-way valve cannot meet the above requirements. In order to ensure that the oil medium in the working equipment can flow back in time, a reflux valve connected to the working equipment is usually additionally provided in the prior art, which makes the structure of the entire oil circulation valve pipe system complex and redundant, and increases the maintenance cost of the oil circulation valve pipe system.

[0003] Therefore, in view of the technical problem that the existing one-way valve cannot meet the requirement of timely reverse reflux of oil from working equipment in an ultra-high pressure working environment, the utility model discloses an ultra-high pressure coupled pumping one-way valve. Utility Model Content

[0004] The purpose of the utility model is to provide a one-way valve for ultra-high pressure coupled pumping, which can be used as a one-way valve under normal circumstances to limit the flow of oil in a single direction; when an emergency situation requires timely reverse reflux of the oil in the working equipment, it can be switched to be used as a reflux valve to ensure that the oil in the working equipment can be reversed and refluxed in time.

[0005] The utility model is realized by the following technical solutions:

[0006] A one-way valve for ultra-high pressure coupled liquid pumping comprises a valve body, a first cavity is provided at the bottom end of the valve body, a second cavity is provided at the top end of the valve body, and the first cavity and the second cavity are connected by a third cavity; a control oil port is provided on the side wall of the first cavity corresponding to the bottom surface of the piston, an oil through port is provided at the top end of the second cavity, and a two-way oil port is provided on the side wall of the third cavity; a piston is slidably provided in the first cavity, and a valve stem is slidably provided in the third cavity, the top end of the valve stem extends to the interior of the second cavity and is provided with a wedge-shaped plug, and the wedge-shaped plug opens or closes the connection between the second cavity and the third cavity as the valve stem moves; the bottom end of the valve stem extends to the interior of the first cavity and is connected to the top of the piston through a first elastic member, and a second elastic member is provided between the top end of the valve stem and the inner top of the second cavity.

[0007] Oil enters from one end of the two-way oil port, and the oil pressure acts on the bottom of the wedge-shaped plug. When the valve stem overcomes the elastic force of the second elastic member, the valve stem moves upward, and the wedge-shaped plug opens the connection between the second cavity and the third cavity. At this time, the oil flows into the second cavity through the third cavity and flows out through the oil port at the top of the second cavity. Due to the direction setting of the wedge-shaped plug, the oil can only flow in one direction from the third cavity to the second cavity. At this time, the valve body acts as a one-way valve.

[0008] When reflux oil extraction is required, oil is admitted to the control oil port on the first cavity, and the control oil pressure acts on the bottom of the piston, so that the piston overcomes the elastic force of the first elastic member and the second elastic member and drives the valve stem to move upward until the valve stem drives the wedge-shaped plug to open the connection between the second cavity and the third cavity. At this time, the second cavity is connected to the third cavity. At this time, suction is performed through the other end of the two-way oil port on the side wall of the third cavity, so that the oil can flow back in the direction from the second cavity to the third cavity.

[0009] The ultra-high pressure mentioned in this application refers to a pressure of 200Mpa-300Mpa.

[0010] In order to better realize the utility model, further, the first elastic member includes a first main spring, a first auxiliary spring, a first main ring piece, and a first auxiliary ring piece. The first main spring is sleeved on the outer side of the bottom end of the valve stem, and the first auxiliary spring is coaxially sleeved on the outer side of the first main spring; the first main ring piece is arranged on the outer side of the bottom end of the first main spring, and the first auxiliary ring piece is arranged on the inner side of the bottom end of the first auxiliary spring. The first main ring piece conflicts with the first auxiliary ring piece after the first main spring moves a first stroke.

[0011] In order to better realize the utility model, further, the second elastic member includes a second spring, the second spring is sleeved on the outside of the top end of the valve stem, the bottom end of the second spring is in contact with the top of the wedge-shaped plug, and the top end of the second spring is in contact with the inner top of the second cavity.

[0012] In order to better realize the utility model, further, a first installation opening is provided at the bottom end of the first cavity, and a sealing cover is installed in cooperation with the internal thread of the first installation opening.

[0013] In order to better implement the utility model, further, the top of the sealing cover is provided with a limiting boss extending to the inside of the first cavity, and the limiting boss is in conflict with the bottom of the piston.

[0014] In order to better implement the utility model, further, a connecting flange is provided at the bottom edge of the sealing cover.

[0015] In order to better realize the utility model, further, the top end of the second cavity is provided with a second mounting port, the internal thread of the second mounting port is matched with a pressure cover installed, and the pressure cover is provided with an oil inlet.

[0016] In order to better realize the utility model, further, the control oil port includes a control oil inlet and a control oil outlet symmetrically arranged on the side wall of the first cavity.

[0017] Compared with the prior art, the utility model has the following advantages and beneficial effects:

[0018] The utility model can be used as a one-way valve under normal working conditions where there is no need for reverse reflux of oil in the working equipment, and can control the oil to flow in a single direction by setting a wedge-shaped plug in a specific direction; in an emergency situation where it is necessary to reverse reflux the oil in the working equipment, control oil can be injected into the third cavity, and the control oil can provide control oil pressure to the piston, which in turn drives the valve stem to move upward through the piston, forcing the wedge-shaped plug to open, thereby ensuring that the oil in the working equipment can reversely reflux, further ensuring the safe operation of the working equipment; at the same time, the utility model does not additionally set a separate reflux valve, simplifies the valve pipe structure, makes the maintenance of the valve pipe system simpler, and reduces the maintenance cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of an ultra-high pressure liquid extraction one-way valve;

[0020] Figure 2 It is a schematic diagram of the valve body used as a one-way valve;

[0021] Figure 3 It is a schematic diagram of the valve body used as a reflux valve;

[0022] Figure 4 is a schematic diagram of the compression of the first main spring;

[0023] Figure 5 is a schematic diagram of the first main spring and the first auxiliary spring being compressed together;

[0024] Figure 6 Schematic diagram of the second spring compression.

[0025] Among them: 1-pressure cover; 2-second elastic part; 3-valve stem; 4-valve body; 5-first elastic part; 6-piston; 7-sealing cover; 21-second spring; 51-first main spring; 52-first auxiliary spring; 53-first main ring piece; 54-first auxiliary ring piece; 100-first cavity; 200-second cavity; 300-third cavity. DETAILED DESCRIPTION

[0026] The following detailed descriptions are all illustrative and are intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in the present invention have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0027] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the utility model. As used herein, unless the utility model explicitly states otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0028] For the convenience of description, if the words "up", "down", "left" and "right" appear in the present invention, they only indicate that they are consistent with the up, down, left and right directions of the drawings themselves, and do not limit the structure. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or component must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0029] Terminology explanation section: The terms "install", "connect", "connect", "fixed" and so on in the present utility model should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be an internal connection between two elements, or an interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to the specific circumstances.

[0030] Embodiment 1:

[0031] A one-way valve for ultra-high pressure coupled liquid extraction in this embodiment, such as Figure 1As shown, it includes a valve body 4, the bottom end of the valve body 4 is provided with a first cavity 100, the top end of the valve body 4 is provided with a second cavity 200, and the first cavity 100 and the second cavity 200 are connected through a third cavity 300; a control oil port is provided on the side wall of the first cavity 100 corresponding to the bottom surface of the piston 6, the top end of the second cavity 200 is provided with an oil port, and the side wall of the third cavity 300 is provided with a two-way oil port; a piston 6 is slidably provided in the first cavity 100 A valve stem 3 is slidably arranged in the third cavity 300, the top end of the valve stem 3 extends to the inside of the second cavity 200 and is provided with a wedge-shaped plug, and the wedge-shaped plug opens or closes the connection between the second cavity 200 and the third cavity 300 as the valve stem 3 moves; the bottom end of the valve stem 3 extends to the inside of the first cavity 100, and is connected to the top of the piston 6 through the first elastic member 5, and a second elastic member 2 is arranged between the top end of the valve stem 3 and the inner top of the second cavity 200.

[0032] The bottom end of the valve body 4 is provided with a first cavity 100, and a piston 6 is slidably provided inside the first cavity 100. A sealing ring is provided between the outer wall of the piston 6 and the inner wall of the first cavity 100 to prevent oil leakage. A control oil port is provided on the side wall of the first cavity 100 corresponding to the bottom surface of the piston 6. The control oil port is connected to an external control oil supply pipeline. The control oil enters the first cavity 100 through the control oil port and acts on the bottom of the piston 6 to provide the piston 6 with a control oil pressure that overcomes the elastic force of the first elastic member 5 and the second elastic member 2.

[0033] The top of the valve body 4 is provided with a second cavity 200, and the top of the second cavity 200 is provided with an oil port, which is connected to the oil medium in the external working element through a pipeline. The inside of the valve body 4 is provided with a third cavity 300 for connecting the first cavity 100 and the second cavity 200, and the inside of the third cavity 300 is provided with a valve stem 3 slidably, and the bottom end of the valve stem 3 is connected to the top of the piston 6 through the first elastic member 5, and a second elastic member 2 is provided between the top of the valve stem 3 and the inner top of the second cavity 200, and a wedge-shaped plug is provided on the outside of the valve stem 3, and the wedge-shaped plug is used to block the connection between the second cavity 200 and the third cavity 300, and a two-way oil port is provided on the side wall of the third cavity 300, and the two-way oil port includes an oil inlet end and a reflux suction end.

[0034] The working principle of the ultra-high pressure liquid extraction check valve is as follows:

[0035] like Figure 2As shown, the control oil port does not input control oil into the first cavity 100, and the piston 6 is not affected by the control oil pressure. At this time, oil enters the oil inlet end of the two-way oil port on the side wall of the third cavity 300. The oil pressure acts on the bottom of the wedge-shaped plug and drives the valve stem 3 to move upward after overcoming the elastic force of the second elastic member 2, so that the third cavity 300 is connected with the second cavity 200. At this time, the oil flows to the external working element through the oil port at the top of the second cavity 200. At this time, the entire valve body acts as a one-way valve.

[0036] like Figure 3 As shown, the control oil port inputs control oil into the first cavity 100, and the two-way oil port no longer inputs oil. After the piston 6 is acted upon by the control oil pressure to overcome the elastic force of the first elastic member 5 and the second elastic member 2, it drives the valve stem 3 to move upward, and the wedge-shaped plug is opened to connect the third cavity 300 with the second cavity 200. At this time, the oil return suction end of the two-way oil port on the side wall of the third cavity 300 is sucked, and the oil medium in the external working element can be reversely sucked through the oil port at the top of the second cavity 200.

[0037] Embodiment 2:

[0038] A one-way valve for ultra-high pressure coupled pumping is improved on the basis of Example 1, such as Figure 4 As shown, the first elastic member 5 includes a first main spring 51, a first auxiliary spring 52, a first main ring piece 53, and a first auxiliary ring piece 54. The first main spring 51 is sleeved on the outer side of the bottom end of the valve stem 3, and the first auxiliary spring 52 is coaxially sleeved on the outer side of the first main spring 51; the first main ring piece 53 is arranged on the outer side of the bottom end of the first main spring 51, and the first auxiliary ring piece 54 is arranged on the inner side of the bottom end of the first auxiliary spring 52. The first main ring piece 53 contacts the first auxiliary ring piece 54 after the first main spring 51 moves the first stroke.

[0039] A limit flange is provided between the third cavity 300 and the first cavity 100, and a through hole is provided at the center of the limit flange for the valve stem 3 to pass through and slide, and the top end of the first main spring 51 abuts against the bottom end face of the limit flange, and the bottom end of the first main spring 51 abuts against the top end face of the piston 6. The first auxiliary spring 52 is coaxially sleeved outside the first main spring 51, and the top end of the first auxiliary spring 52 abuts against the bottom end face of the limit flange, and a first stroke spacing is reserved between the first auxiliary spring 52 and the top end face of the piston 6.

[0040] like Figure 5As shown, the control oil pressure acts on the bottom of the piston 6, driving the piston 6 to move upward to squeeze the first main spring 51. After the first main spring 51 is compressed for the first stroke, the first main ring piece 53 outside the first main spring 51 contacts the first auxiliary ring piece 54, and drives the first auxiliary spring 52 to be compressed through the first auxiliary ring piece 54. At this time, the piston 6 needs to overcome the elastic force of the first main spring 51 and the first auxiliary spring 52 at the same time to continue to move upward, so that the working pressure range of the entire valve body is higher.

[0041] The other parts of this embodiment are the same as those of Embodiment 1, and thus will not be described in detail.

[0042] Embodiment 3:

[0043] A one-way valve for ultra-high pressure coupled pumping, improved on the basis of embodiment 1 or 2, such as Figure 6 As shown, the second elastic member 2 includes a second spring 21, which is sleeved on the outer side of the top end of the valve stem 3, the bottom end of the second spring 21 abuts against the top of the wedge-shaped plug, and the top end of the second spring 21 abuts against the inner top of the second cavity 200.

[0044] When the valve stem 3 moves upward, the second spring 21 is compressed. At this time, the piston 6 needs to overcome the elastic force of the first main spring 51, the first auxiliary spring 52, and the second spring 21 to continue to drive the valve stem 3 to move upward, so that the working pressure range of the entire valve body is further improved, ensuring that the valve body can be suitable for an ultra-high pressure working environment of 200Mpa-300Mpa.

[0045] The other parts of this embodiment are the same as those of Embodiment 1 or 2, and thus will not be described in detail.

[0046] Embodiment 4:

[0047] A one-way valve for ultra-high pressure coupled liquid extraction, improved on the basis of any one of embodiments 1-3, such as Figure 1 As shown, the bottom end of the first cavity 100 is provided with a first installation opening, and the internal thread of the first installation opening cooperates with the sealing cover 7. The inner wall of the first installation opening is provided with an internal thread, and the outer side of the sealing cover 7 is provided with an external thread, and the sealing cover 7 is sealed and installed at the bottom end of the first cavity 100 by cooperating with the internal thread and the external thread.

[0048] Furthermore, a limiting boss extending into the first cavity 100 is provided on the top of the sealing cover 7, and the limiting boss abuts against the bottom of the piston 6. The limiting boss is used to limit the extreme position of the downward movement of the piston 6 to ensure that the bottom end surface of the piston 6 is always higher than the control oil port, so that the control oil flowing into the control oil port always acts completely on the bottom end surface of the piston 6.

[0049] Furthermore, a connecting flange is provided at the bottom edge of the sealing cover 7 .

[0050] The other parts of this embodiment are the same as any one of Embodiments 1-3, so they are not described again.

[0051] Embodiment 5:

[0052] A one-way valve for ultra-high pressure coupled liquid extraction, improved on the basis of any one of embodiments 1-4, such as Figure 1 As shown, the top of the second cavity 200 is provided with a second mounting port, the inner thread of the second mounting port is matched with a gland 1, and an oil inlet is provided on the gland 1. A center hole is provided at the center of the gland 1, and the center hole is slidably connected with the top of the valve stem 3 to guide the valve stem 3, and a plurality of oil inlets are circumferentially provided on the gland 1 around the center hole.

[0053] The other parts of this embodiment are the same as any one of Embodiments 1-4, so they are not described again.

[0054] Embodiment 6:

[0055] A one-way valve for ultra-high pressure coupled liquid extraction, improved on the basis of any one of embodiments 1-5, such as Figure 1 As shown, the control oil port includes a control oil inlet and a control oil outlet symmetrically arranged on the side wall of the first cavity 100. The control oil inlet is connected to the control oil inlet pipeline, and the control oil outlet is connected to the control oil outlet pipeline. Both the control oil inlet pipeline and the control oil outlet pipeline are provided with control solenoid valves, and the opening and closing conditions and opening degrees of the control oil inlet pipeline and the control oil outlet pipeline are controlled by the control solenoid valves, thereby controlling the flow of the control oil flowing into and out of the first cavity 100, and finally realizing the control oil pressure on the control piston 6.

[0056] The other parts of this embodiment are the same as any one of Embodiments 1-5, so they are not described again.

[0057] The above are only preferred embodiments of the present invention and are not intended to limit the present invention in any form. Any simple modifications or equivalent changes made to the above embodiments based on the technical essence of the present invention fall within the protection scope of the present invention.

Claims

1. A one-way valve for ultra-high pressure coupled pumping, comprising a valve body (4), characterized in that: The bottom end of the valve body (4) is provided with a first cavity (100), the top end of the valve body (4) is provided with a second cavity (200), and the first cavity (100) and the second cavity (200) are connected via a third cavity (300); a control oil port is provided on the side wall of the first cavity (100) corresponding to the bottom surface of the piston (6), an oil through port is provided on the top end of the second cavity (200), and a bidirectional oil port is provided on the side wall of the third cavity (300); a piston (6) is slidably provided in the first cavity (100), and the third cavity (300) is provided with a control oil port. A valve stem (3) is slidably arranged in the body (300), the top end of the valve stem (3) extending into the interior of the second cavity (200) and being provided with a wedge-shaped plug, the wedge-shaped plug opening or closing the connection between the second cavity (200) and the third cavity (300) as the valve stem (3) moves; the bottom end of the valve stem (3) extending into the interior of the first cavity (100) and being connected to the top of the piston (6) via a first elastic member (5), a second elastic member (2) being provided between the top end of the valve stem (3) and the inner top of the second cavity (200).

2. The one-way valve for ultra-high pressure coupled liquid extraction according to claim 1, characterized in that: The first elastic member (5) comprises a first main spring (51), a first auxiliary spring (52), a first main ring piece (53), and a first auxiliary ring piece (54); the first main spring (51) is sleeved on the outer side of the bottom end of the valve stem (3); the first auxiliary spring (52) is coaxially sleeved on the outer side of the first main spring (51); the first main ring piece (53) is arranged on the outer side of the bottom end of the first main spring (51); the first auxiliary ring piece (54) is arranged on the inner side of the bottom end of the first auxiliary spring (52); the first main ring piece (53) comes into contact with the first auxiliary ring piece (54) after the first main spring (51) moves a first stroke.

3. The one-way valve for ultra-high pressure coupled liquid extraction according to claim 1, characterized in that: The second elastic member (2) comprises a second spring (21), the second spring (21) being sleeved on the outside of the top end of the valve stem (3), the bottom end of the second spring (21) being in contact with the top of the wedge-shaped plug, and the top end of the second spring (21) being in contact with the inner top of the second cavity (200).

4. The one-way valve for ultra-high pressure coupled liquid extraction according to any one of claims 1 to 3, characterized in that: A first installation opening is provided at the bottom end of the first cavity (100), and a sealing cover (7) is installed in cooperation with the internal threads of the first installation opening.

5. The one-way valve for ultra-high pressure coupled liquid extraction according to claim 4, characterized in that: The top of the sealing cover (7) is provided with a limiting boss extending into the interior of the first cavity (100), and the limiting boss abuts against the bottom of the piston (6).

6. The one-way valve for ultra-high pressure coupled liquid extraction according to claim 5, characterized in that: A connecting flange is provided at the bottom edge of the sealing cover (7).

7. The one-way valve for ultra-high pressure coupled liquid extraction according to any one of claims 1 to 3, characterized in that: A second mounting opening is provided at the top end of the second cavity (200), a gland (1) is mounted on the inner thread of the second mounting opening, and an oil inlet is provided on the gland (1).

8. The one-way valve for ultra-high pressure coupled liquid extraction according to any one of claims 1 to 3, characterized in that: The control oil port comprises a control oil inlet and a control oil outlet which are symmetrically arranged on the side wall of the first cavity (100).

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