Fluid injection control valve

Abstract

The invention provides a fluid injection control valve. The fluid injection control valve is characterized in that an air inlet channel, a mounting groove and an air outlet channel which are sequentially communicated are arranged in a valve main body; the first containing piece is provided with a containing cavity and an opening communicating the containing cavity with the outside of the first containing piece. The opening is located in the side, facing the valve body, of the first containing piece. The plugging piece is movably arranged in the mounting groove, and the plugging piece is provided with a plugging position for cutting off communication between the air inlet channel and the air outlet channel and a communication position for communicating the air inlet channel and the air outlet channel; the transmission piece is movably arranged in the containing cavity, and the transmission piece and the blocking piece move synchronously; the elastic reset piece is arranged in the containing cavity and located between the transmission piece and the first containing piece, and the elastic reset piece can drive the blocking piece to be kept at the communicating position; the gas driving structure can inject gas into the containing cavity through the opening so that the blocking piece can be switched to the blocking position from the communicating position. According to the technical scheme, the problem that fluid flows back after being injected in the prior art is effectively solved.

Description

Technical Field

[0001] The present invention relates to the technical field of fluid injection equipment, and in particular to a fluid injection control valve. Background Art

[0002] Injecting carbon dioxide into oil wells has become an effective means to improve crude oil recovery. Based on the property that carbon dioxide can be miscible with crude oil under high pressure, by injecting liquid or gaseous carbon dioxide into the oil layer, the viscosity of crude oil can be significantly reduced and its fluidity can be enhanced. Carbon dioxide can not only dissolve in crude oil, but also expand its volume, thereby forcing more crude oil to flow to the wellhead and improving production efficiency. Especially for low-permeability and ultra-low-permeability reservoirs, carbon dioxide flooding technology has shown a more significant recovery effect than traditional methods, meeting the needs of improving economic benefits and resource utilization in oil field development.

[0003] In the prior art, after the carbon dioxide injection is completed, due to the high downhole pressure, the carbon dioxide gas in the well may flow back to the surface equipment, causing overpressure of the surface equipment, triggering equipment failure, and may also cause the injection string and pipeline to freeze. Therefore, a carbon dioxide injection check device can be used to prevent the carbon dioxide from flowing back after the carbon dioxide is injected.

[0004] The carbon dioxide injection check device includes a mounting shell, a movable column and an elastic reset member. When carbon dioxide is injected from the input end and flows out from the output end, the movable column will be squeezed to move under the pressure of carbon dioxide, so that the movable column moves in the mounting shell and squeezes the elastic reset member, resulting in a gap between the movable column and the mounting shell, and carbon dioxide flows in. However, after the carbon dioxide injection is completed, if the pressure at the output end is lower than the pressure at the input end, there will be a gap between the movable column and the mounting shell when there is no carbon dioxide injection, which may cause carbon dioxide to flow back. Summary of the invention

[0005] The main purpose of the present invention is to provide a fluid injection control valve to solve the problem of fluid backflow after injection in the related art.

[0006] In order to achieve the above-mentioned purpose, according to one aspect of the present invention, a fluid injection control valve is provided, comprising: a valve body, in which an air inlet channel, a mounting groove and an air outlet channel connected in sequence are arranged; a first accommodating member, arranged on the valve body, the first accommodating member having an accommodating cavity and an opening connecting the accommodating cavity and the outside of the first accommodating member, the opening being located on the side of the first accommodating member facing the valve body; a blocking member, the blocking member being movably arranged in the mounting groove, the blocking member having a blocking position for cutting off the connection between the air inlet channel and the air outlet channel and a connecting position for connecting the air inlet channel and the air outlet channel; a transmission member, movably arranged in the accommodating cavity, the transmission member and the blocking member moving synchronously; an elastic reset member, the elastic reset member being arranged in the accommodating cavity and being located between the transmission member and the first accommodating member, the elastic reset member being able to drive the blocking member to remain in the connecting position; a gas driving structure, the gas driving structure being connected to the opening, the gas driving structure being able to inject gas into the accommodating cavity through the opening to switch the blocking member from the connecting position to the blocking position.

[0007] Furthermore, the transmission member includes a connecting rod, a first end of the connecting rod is movably arranged in the accommodating cavity, the elastic reset member is arranged between the first end of the connecting rod and the first accommodating member, and the second end of the connecting rod is connected to the blocking member.

[0008] Furthermore, a conducting channel is provided on the blocking member. When the blocking member is in the blocking position, the conducting channel is staggered with the air inlet channel. When the blocking member is in the communicating position, the conducting channel is communicated with both the air inlet channel and the air outlet channel.

[0009] Furthermore, a first avoidance hole is provided on one side of the first accommodation member close to the valve body, and the fluid injection control valve further comprises a sealing member provided at the first avoidance hole, and the sealing member is sealingly matched with the side wall of the connecting rod.

[0010] Furthermore, a second avoidance hole is provided on one side of the valve body close to the first accommodation member, the second avoidance hole is communicated with the mounting groove, and the connecting rod is passed through the second avoidance hole and connected to the blocking member.

[0011] Furthermore, the transmission member also includes a support plate, which is arranged at the first end of the connecting rod, the support plate is sealed with the inner wall of the first accommodating member, the opening is located between the support plate and the valve body, and the elastic reset member is arranged on the side of the support plate away from the valve body.

[0012] Furthermore, the gas driving structure includes a driving member, a switch member and a connecting pipe, the driving member includes a second accommodating member, the connecting pipe is connected between the second accommodating member and the first accommodating member, and the switch member is arranged on the connecting pipe.

[0013] Furthermore, the switch element includes a solenoid valve.

[0014] Furthermore, the driving member also includes a push rod and a push plate connected to the push rod, and the push plate is movably arranged in the second accommodating member and is sealed with the inner wall of the second accommodating member.

[0015] Further, the first accommodation member is located between the second accommodation member and the valve body, and a cross-sectional area of ​​the first accommodation member is greater than a cross-sectional area of ​​the second accommodation member.

[0016] According to the technical solution of the present invention, the fluid injection control valve includes a valve body, a first accommodating member, a blocking member, a transmission member, an elastic reset member and a gas drive structure. An air inlet channel, a mounting groove and an air outlet channel are sequentially arranged in the valve body, and the air inlet channel, the mounting groove and the air outlet channel are connected. The first accommodating member is arranged on the valve body, and the first accommodating member has an accommodating cavity and an opening, and the opening connects the accommodating cavity and the outside of the first accommodating member. The blocking member is movably arranged in the mounting groove, and the blocking member has a blocking position and a connecting position. When the blocking member is in the blocking position, the blocking member cuts off the conducting channel and the air outlet channel. When the blocking member is in the connecting position, the blocking member connects the air inlet channel and the air outlet channel. The transmission member is movably arranged in the accommodating cavity, and the transmission member moves synchronously with the blocking member. The elastic reset member is arranged in the accommodating cavity, and the elastic reset member is located between the transmission member and the first accommodating member. The elastic reset member can drive the blocking member to remain in the connecting position. The gas drive structure is connected to the opening, and the opening is located on the side of the first accommodating member facing the valve body. The gas drive structure can inject gas into the accommodating chamber through the opening, so that the blocking member switches from the connected position to the blocked position. Through the above arrangement, the fluid can flow from the air inlet channel to the air outlet channel. The gas drive structure can inject gas into the accommodating chamber, so that the blocking member switches from the connected position to the blocked position, so that the blocking member can cut off the connection between the air inlet channel and the air outlet channel, and prevent the fluid from flowing back to the air inlet channel after passing through the air outlet channel. The opening allows the gas to enter the accommodating chamber, and then the gas can drive the transmission member to move, so that the transmission member drives the blocking member to move, so that the blocking member can switch from the connected position to the blocked position. Therefore, the technical solution of the present application effectively solves the problem of fluid backflow after injection in the related art. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0018] Figure 1 A cross-sectional schematic diagram showing an embodiment of a fluid injection control valve according to the present invention;

[0019] Figure 2 Shows Figure 1 A partial enlarged schematic diagram of the fluid injection control valve at point A;

[0020] Figure 3 Shows Figure 1 A schematic diagram showing a blocking member of a fluid injection control valve in a blocking position;

[0021] Figure 4 Shows Figure 1 A schematic cross-sectional view of a sealing member of a fluid injection control valve.

[0022] The above drawings include the following reference numerals:

[0023] 10. Valve body; 11. Air inlet channel; 12. Mounting groove; 13. Air outlet channel; 14. Second avoidance hole; 20. First accommodating member; 21. Accommodating chamber; 22. Opening; 23. First avoidance hole; 24. Sealing member; 30. Blocking member; 31. Conducting channel; 40. Transmission member; 41. Connecting rod; 42. Support plate; 50. Elastic reset member; 60. Gas drive structure; 61. Driving member; 611. Second accommodating member; 612. Push rod; 613. Push plate; 62. Switch member; 621. Solenoid valve; 63. Connecting pipe. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] 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 present application. As used herein, unless the context clearly indicates 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.

[0026] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the present invention. Meanwhile, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be considered as a part of the specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, and therefore, once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0027] like Figure 1 As shown, in this embodiment, the fluid injection control valve includes: a valve body 10, a first accommodating member 20, a blocking member 30, a transmission member 40, an elastic reset member 50 and a gas drive structure 60. The valve body 10 is provided with an inlet channel 11, a mounting groove 12 and an outlet channel 13 which are connected in sequence. The first accommodating member 20 is arranged on the valve body 10, and the first accommodating member 20 has an accommodating cavity 21 and an opening 22 which connects the accommodating cavity 21 and the outside of the first accommodating member 20, and the opening 22 is located on the side of the first accommodating member 20 facing the valve body 10. The blocking member 30 is movably arranged in the mounting groove 12, and the blocking member 30 has a blocking position for cutting off the connection between the inlet channel 11 and the outlet channel 13 and a connecting position for connecting the inlet channel 11 and the outlet channel 13. The transmission member 40 is movably arranged in the accommodating cavity 21, and the transmission member 40 moves synchronously with the blocking member 30. The elastic reset member 50 is disposed in the accommodating chamber 21 and between the transmission member 40 and the first accommodating member 20. The elastic reset member 50 can drive the blocking member 30 to remain in the communication position. The gas driving structure 60 is in communication with the opening 22. The gas driving structure 60 can inject gas into the accommodating chamber 21 through the opening 22 to switch the blocking member 30 from the communication position to the blocking position.

[0028] Applying the technical solution of this embodiment, the fluid injection control valve includes a valve body 10, a first accommodating member 20, a blocking member 30, a transmission member 40, an elastic reset member 50 and a gas drive structure 60. An air inlet channel 11, a mounting groove 12 and an air outlet channel 13 are sequentially arranged in the valve body 10, and the air inlet channel 11, the mounting groove 12 and the air outlet channel 13 are connected. The first accommodating member 20 is arranged on the valve body 10, and the first accommodating member 20 has an accommodating cavity 21 and an opening 22, and the opening 22 communicates the accommodating cavity 21 and the outside of the first accommodating member 20. The blocking member 30 is movably arranged in the mounting groove 12, and the blocking member 30 has a blocking position and a connecting position. When the blocking member 30 is in the blocking position, the blocking member 30 cuts off the conducting channel 31 and the air outlet channel 13. When the blocking member 30 is in the connecting position, the blocking member 30 connects the air inlet channel 11 and the air outlet channel 13. The transmission member 40 is movably arranged in the accommodating chamber 21, and the transmission member 40 moves synchronously with the blocking member 30. The elastic reset member 50 is arranged in the accommodating chamber 21, and the elastic reset member 50 is located between the transmission member 40 and the first accommodating member 20. The elastic reset member 50 can drive the blocking member 30 to remain in the connected position. The gas drive structure 60 is connected with the opening 22, and the opening 22 is located on the side of the first accommodating member 20 facing the valve body 10. The gas drive structure 60 can inject gas into the accommodating chamber 21 through the opening 22, so that the blocking member 30 switches from the connected position to the blocked position. Through the above arrangement, the fluid can flow from the air inlet channel 11 to the air outlet channel 13. The gas drive structure 60 can inject gas into the accommodating chamber 21, so that the blocking member 30 switches from the connected position to the blocked position, so that the blocking member 30 can cut off the connection between the air inlet channel 11 and the air outlet channel 13, and prevent the fluid from flowing through the air outlet channel 13 and then flowing back to the air inlet channel 11. The opening 22 allows gas to enter the accommodating chamber 21, and then the gas can drive the transmission member 40 to move, so that the transmission member 40 drives the blocking member 30 to move, so that the blocking member 30 can switch from the connecting position to the blocking position. Therefore, the technical solution of this embodiment effectively solves the problem of fluid backflow after injection in the related art.

[0029] By injecting fluid, the transmission member 40 drives the blocking member 30 to move, thereby cutting off or connecting the air inlet channel 11 and the air outlet channel 13. When the fluid is injected, the elastic reset member 50 drives the blocking member 30 to remain in the connecting position to ensure smooth passage of the fluid. When the injection is stopped, the gas drive structure 60 injects fluid through the opening 22 to push the blocking member 30 to move to the blocking position, effectively preventing the fluid from flowing back.

[0030] like Figure 1 and Figure 2As shown, in this embodiment, the transmission member 40 includes a connecting rod 41, a first end of the connecting rod 41 is movably disposed in the accommodating chamber 21, an elastic reset member 50 is disposed between the first end of the connecting rod 41 and the first accommodating member 20, and a second end of the connecting rod 41 is connected to the blocking member 30. When gas enters the accommodating chamber 21, it can drive the connecting rod 41 to move, and then the connecting rod 41 can drive the blocking member 30 to move.

[0031] The connecting rod 41 acts as a transmission medium to transmit the force of the gas driving structure 60 to the blocking member 30, thereby realizing the movement of the blocking member 30. Under the action of the gas driving structure 60, the connecting rod 41 drives the blocking member 30 to move, thereby realizing the opening and closing of the fluid injection control valve.

[0032] like Figure 1 , Figure 3 as well as Figure 4 As shown, in this embodiment, a conducting channel 31 is provided on the blocking member 30. When the blocking member 30 is in the blocking position, the conducting channel 31 is staggered with the air inlet channel 11. When the blocking member 30 is in the communicating position, the conducting channel 31 is communicated with both the air inlet channel 11 and the air outlet channel 13. The conducting channel 31 enables the fluid flowing in through the air inlet channel 11 to flow to the air outlet channel 13.

[0033] The fluid injection control valve is opened and closed by changing the position of the conducting channel 31. When the blocking member 30 moves to the blocking position, the conducting channel 31 is misaligned with the air inlet channel 11, cutting off the fluid channel. When the blocking member 30 moves to the connecting position, the conducting channel 31 is connected with the air inlet channel 11 and the air outlet channel 13, ensuring smooth passage of the fluid.

[0034] like Figure 1 and Figure 2 As shown, in this embodiment, a first avoidance hole 23 is provided on one side of the first accommodation member 20 close to the valve body 10, and the fluid injection control valve further comprises a sealing member 24 provided at the first avoidance hole 23, and the sealing member 24 is in sealing cooperation with the side wall of the connecting rod 41. The sealing member 24 can be installed at the first avoidance hole 23, and the sealing member 24 can be in sealing cooperation with the side wall of the connecting rod 41, so that the gas can be prevented from flowing out of the first accommodation member 20 through the first avoidance hole 23.

[0035] like Figure 1 and Figure 2 As shown, in this embodiment, a second avoidance hole 14 is provided on one side of the valve body 10 close to the first accommodation member 20, the second avoidance hole 14 is communicated with the mounting groove 12, and the connecting rod 41 is passed through the second avoidance hole 14 and connected to the blocking member 30. The second avoidance hole 14 can avoid the valve body 10, so that the connecting rod 41 can extend into the valve body 10, ensuring a stable connection between the connecting rod 41 and the blocking member 30.

[0036] like Figure 1 and Figure 2 As shown, in this embodiment, the transmission member 40 further includes a support plate 42, which is arranged at the first end of the connecting rod 41, and the support plate 42 is sealed with the inner wall of the first accommodating member 20, and the opening 22 is located between the support plate 42 and the valve body 10, and the elastic reset member 50 is arranged on the side of the support plate 42 away from the valve body 10. The gas can drive the support plate 42 to move, and then the support plate 42 can drive the connecting rod 41 to move. When the support plate 42 moves, it can drive the elastic reset member 50 to move, and then after the gas flows out of the accommodating chamber 21, the elastic reset member 50 can drive the support plate 42 to move, and the movement of the support plate 42 drives the blocking member 30 to move, so that the blocking member 30 moves from the blocking position to the connecting position.

[0037] The support plate 42 is closely matched with the inner wall of the first accommodating member 20 to ensure that the fluid of the gas driving structure 60 can effectively act on the transmission member 40, and the elastic reset member 50 is arranged on the side of the support plate 42 away from the valve body 10 to provide a reset force for the blocking member 30. When the fluid is stopped, the gas driving structure 60 injects fluid through the connection between the support plate 42 and the first accommodating member 20 to push the blocking member 30 to move to the blocking position. When the fluid is injected, the elastic reset member 50 drives the blocking member 30 to reset to the connection position to ensure smooth passage of the fluid.

[0038] like Figure 1 As shown, in this embodiment, the gas driving structure 60 includes a driving member 61, a switch member 62 and a connecting pipe 63, the driving member 61 includes a second accommodating member 611, the connecting pipe 63 is connected between the second accommodating member 611 and the first accommodating member 20, and the switch member 62 is arranged on the connecting pipe 63. The driving member 61 can drive the gas in the second accommodating member 611 to flow into the first accommodating member 20. The switch member 62 can control the on and off of the second accommodating member 611 and the first accommodating member 20.

[0039] The driving member 61 generates driving force, the switch member 62 controls the on and off of the fluid, and the connecting pipe 63 realizes the transmission of the fluid. When the injection is stopped, the driving member 61 generates driving force, and the fluid is injected into the accommodating cavity 21 of the first accommodating member 20 through the control of the connecting pipe 63 and the switch member 62, pushing the blocking member 30 to move to the blocking position. During injection, the elastic reset member 50 drives the blocking member 30 to reset to the connected position to ensure smooth passage of the fluid.

[0040] like Figure 1 As shown, in this embodiment, the switch member 62 includes a solenoid valve 621. The solenoid valve 621 can control the on-off between the second accommodation member 611 and the first accommodation member 20.

[0041] The electromagnetic valve 621 is used to realize the on-off control of the fluid. When the injection is stopped, the electromagnetic valve 621 is opened, and the fluid generated by the driving member 61 is injected into the accommodating chamber 21 of the first accommodating member 20 through the connecting pipe 63, pushing the blocking member 30 to move to the blocking position. When injecting, the electromagnetic valve 621 is closed, and the elastic reset member 50 drives the blocking member 30 to reset to the connecting position to ensure the smooth passage of the fluid.

[0042] like Figure 1 As shown, in this embodiment, the driving member 61 further includes a push rod 612 and a push plate 613 connected to the push rod 612, and the push plate 613 is movably disposed in the second accommodation member 611 and is sealed with the inner wall of the second accommodation member 611. The push rod 612 can drive the push plate 613 to move, and then the push plate 613 can push the gas in the second accommodation member 611 to move, so that the gas flows into the first accommodation member 20.

[0043] The movement of the push rod 612 and the push plate 613 generates a driving force to push the blocking member 30 to move. When the injection is stopped, the driving member 61 injects the fluid into the accommodating cavity 21 of the first accommodating member 20 through the movement of the push rod 612 and the push plate 613, pushing the blocking member 30 to move to the blocking position. During the injection, the elastic reset member 50 drives the blocking member 30 to reset to the connecting position to ensure the smooth passage of the fluid.

[0044] like Figure 1 As shown, in this embodiment, the first accommodating member 20 is located between the second accommodating member 611 and the valve body 10, and the cross-sectional area of ​​the first accommodating member 20 is greater than the cross-sectional area of ​​the second accommodating member 611. The difference in cross-sectional area between the first accommodating member 20 and the second accommodating member 611 ensures that the fluid of the gas driving structure 60 can effectively act on the transmission member 40, while providing sufficient space to accommodate the transmission member 40 and the elastic return member 50.

[0045] The fluid injection control valve further includes an input pipe and an output pipe connected to the valve body 10 . The input pipe is communicated with the air inlet passage 11 , and the output pipe is communicated with the air outlet passage 13 .

[0046] The fluid is carbon dioxide gas.

[0047] The blocking piece comprises a blocking block, the projection of the blocking block on the cross section perpendicular to the conducting channel is trapezoidal, and the mounting groove is adapted to the shape of the blocking block, so that the contact between the blocking block and the mounting groove is more stable.

[0048] In other embodiments, the conducting channel may not be provided on the blocking block, and when in the communicating position, the blocking block is located above the air inlet channel and the air outlet channel.

[0049] In the fluid injection state, the fluid passes through the interior of the valve body 10, specifically, the fluid enters the air inlet channel 11 inside the valve body 10 through the input pipe, and passes through the conducting channel 31 in the sealing member 30 inside the air outlet channel 13 to enter the air outlet channel 13 inside the valve body 10, and then is discharged through the output pipe. When the injection is stopped, the driving member 61 is started by operating the external control device, and the driving member 61 drives the push plate 613 to move downward through the push rod 612. The push plate 613 will push the gas inside the second accommodating member 611 out. At the same time, the switch member 62 is opened, so that the gas is pressed into the bottom of the first accommodating member 20 through the boosting gas pipeline. Under the push of the gas, the support plate 4 2 overcomes the elastic force of the elastic reset member 50 and moves upward, the support plate 42 drives the push rod to move upward synchronously, the push rod drives the blocking member 30 to move upward, the blocking member 30 moves upward to the top of the gas outlet channel 13, the conduction channel 31 is misaligned with the gas outlet channel 13 and the gas inlet channel 11, the blocking member 30 blocks the gas outlet channel 13 and the gas inlet channel 13, so that the gas will not flow back through the valve body 10, and thus the fluid in the well cannot flow back. The device has a boosting function, and the blocking state of the blocking member 30 can be controlled by boosting. The blocking member 30 does not rely on the pressure of the fluid, and can also achieve a closed blocking function when the gas pressure is relatively low, thereby preventing leakage when the fluid is injected, thereby improving safety.

[0050] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the devices or elements referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention. The directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0051] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0052] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0053] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A fluid injection control valve, characterized in that: include: A valve body (10), wherein the valve body (10) is provided with an air inlet passage (11), a mounting groove (12) and an air outlet passage (13) which are connected in sequence; a first accommodating member (20) disposed on the valve body (10), the first accommodating member (20) having an accommodating cavity (21) and an opening (22) communicating the accommodating cavity (21) with the outside of the first accommodating member (20), the opening (22) being located on a side of the first accommodating member (20) facing the valve body (10); a blocking member (30), the blocking member (30) being movably arranged in the mounting groove (12), the blocking member (30) having a blocking position for cutting off the connection between the air inlet channel (11) and the air outlet channel (13), and a connecting position for connecting the air inlet channel (11) and the air outlet channel (13); A transmission member (40) is movably disposed in the accommodating cavity (21), and the transmission member (40) moves synchronously with the blocking member (30); an elastic return member (50), the elastic return member (50) being arranged in the accommodating cavity (21) and being located between the transmission member (40) and the first accommodating member (20), the elastic return member (50) being capable of driving the blocking member (30) to remain in the communicating position; A gas drive structure (60), the gas drive structure (60) being in communication with the opening (22), the gas drive structure (60) being capable of injecting gas into the accommodating cavity (21) through the opening (22) so as to switch the blocking member (30) from the communicating position to the blocking position.

2. The fluid injection control valve according to claim 1, characterized in that: The transmission member (40) comprises a connecting rod (41), a first end of the connecting rod (41) being movably arranged in the accommodating cavity (21), the elastic return member (50) being arranged between the first end of the connecting rod (41) and the first accommodating member (20), and a second end of the connecting rod (41) being connected to the blocking member (30).

3. The fluid injection control valve according to claim 2, characterized in that: The blocking member (30) is provided with a conducting channel (31); when the blocking member (30) is in the blocking position, the conducting channel (31) is staggered with the air inlet channel (11); when the blocking member (30) is in the communicating position, the conducting channel (31) is communicated with both the air inlet channel (11) and the air outlet channel (13).

4. The fluid injection control valve according to claim 2 or 3, characterized in that: A first avoidance hole (23) is provided on one side of the first accommodating member (20) close to the valve body (10), and the fluid injection control valve further comprises a sealing member (24) provided at the first avoidance hole (23), and the sealing member (24) is sealingly matched with the side wall of the connecting rod (41).

5. The fluid injection control valve according to claim 2 or 3, characterized in that: A second avoidance hole (14) is provided on one side of the valve body (10) close to the first accommodating member (20), the second avoidance hole (14) is communicated with the mounting groove (12), and the connecting rod (41) is passed through the second avoidance hole (14) and connected to the blocking member (30).

6. The fluid injection control valve according to claim 2 or 3, characterized in that: The transmission member (40) further comprises a support plate (42), wherein the support plate (42) is arranged at the first end of the connecting rod (41), the support plate (42) is sealingly matched with the inner wall of the first accommodating member (20), the opening (22) is located between the support plate (42) and the valve body (10), and the elastic return member (50) is arranged on a side of the support plate (42) away from the valve body (10).

7. The fluid injection control valve according to claim 1, characterized in that: The gas driving structure (60) comprises a driving member (61), a switch member (62) and a connecting pipe (63); the driving member (61) comprises a second accommodating member (611); the connecting pipe (63) is connected between the second accommodating member (611) and the first accommodating member (20); and the switch member (62) is arranged on the connecting pipe (63).

8. The fluid injection control valve according to claim 7, characterized in that: The switch element (62) comprises a solenoid valve (621).

9. The fluid injection control valve according to claim 7 or 8, characterized in that: The driving member (61) further comprises a push rod (612) and a push plate (613) connected to the push rod (612); the push plate (613) is movably disposed in the second accommodating member (611) and is sealingly matched with the inner wall of the second accommodating member (611).

10. The fluid injection control valve according to claim 7 or 8, characterized in that: The first accommodating member (20) is located between the second accommodating member (611) and the valve body (10), and the cross-sectional area of ​​the first accommodating member (20) is greater than the cross-sectional area of ​​the second accommodating member (611).

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