Valve device

Abstract

The utility model provides a valve device which comprises a valve body provided with an inner cavity and a flow channel which are communicated with each other, and the flow channel can be connected with an oil-gas pipeline. The valve element is located in the inner cavity, the valve element is provided with a sealing structure and a throttling structure, the sealing structure is rotatably arranged in the inner cavity, the sealing structure is provided with a first channel, and the first channel can be communicated with the flow channel; the throttling structure is rotatably arranged in the first channel, the throttling structure is provided with a second channel, and the second channel can be communicated with the first channel; the elastic structure is in driving connection with the sealing structure, and the sealing structure can rotate until the first channel is communicated with the flow channel and can rotate until the first channel is isolated from the flow channel under the driving of the elastic structure; the throttling and cutting-off integrated valve solves the problem that an existing throttling and cutting-off integrated valve cannot be suitable for small and medium-sized gas wells.

Description

Technical Field

[0001] The utility model relates to the technical field of oil and gas well equipment, in particular to a valve device. Background Art

[0002] The description in this section merely provides background information related to the disclosure of the present utility model and does not constitute prior art.

[0003] During the production of oil and gas wells, along with the large-scale development and construction of gas fields, the production capacity of old wells will gradually decline until it can no longer meet the requirements of carrying liquid and resuming production; intermittent well opening and closing is an effective measure, relying on the energy recovery of the gas well itself to achieve the standard of resuming production. This method has become an indispensable method for stabilizing and increasing production in the later stage of gas well production. When using the intermittent production operation mode of oil and gas wells, it is necessary to install a throttle valve and an emergency sealing device in the pipeline for use, that is, it is necessary to open, close or intermittently produce wells according to the production demand, which consumes manpower, material resources and time; further, during the production process of oil and gas wells, ground pipeline blockage and throttle failure often occur. At this time, the pressure of the ground pipeline will increase, and then the ground pipeline will be over-pressurized. At this time, it is necessary to manually close the pipeline valve or adjust the throttle valve in time; in another case, the pipeline will also be corroded or accidentally damaged and leaked, causing the wellhead pressure to decrease. At this time, the valve also needs to be shut off urgently, which increases the production safety risk and personnel safety risk.

[0004] In response to the above problems, there is a solution of installing a dual-valve control device in the production pipeline, wherein one device controls the regulating throttle valve and the other valve controls the emergency sealing of the production pipeline; the use of this device first requires the installation of two control devices at the wellhead, but in the actual oil and gas production process, the installation space that can be provided by the wellhead is limited, and the use of a dual-valve control device will seriously occupy the equipment installation space at the wellhead, affecting the expansion and efficiency transformation space of underground oil and gas wells, and also making the dual-valve control device only applicable to some larger wellheads, and cannot be used in small gas wells that often appear in the actual production environment, that is, it is impossible to completely solve the production safety problem and meet the dynamic pressure regulation and throttling needs of smaller gas wells; further, the use of two valves for control, during the process of the sealing valve urgently sealing the pipeline, the sudden change in the pressure of the downhole pipeline caused will directly cause an oscillation effect on the other throttle valve, accelerating the aging of the throttle valve, resulting in higher maintenance costs and more maintenance time for the oil and gas wells, and reducing the efficiency of oil and gas extraction.

[0005] It should be noted that the above introduction to the technical background is only for the convenience of providing a clear and complete description of the technical solutions of the utility model and for the convenience of understanding by those skilled in the art. It cannot be considered that the above technical solutions are well known to those skilled in the art simply because these solutions are described in the background technology section of the utility model. Utility Model Content

[0006] The utility model aims to provide a valve device, which solves the problem that the existing throttling and cutoff integrated valve cannot be applied to small and medium-sized gas wells.

[0007] The above-mentioned implementation purpose of the utility model is mainly achieved by the following technical solutions:

[0008] The utility model provides a valve device, comprising:

[0009] A valve body having an inner cavity and a flow channel connected to each other, wherein the flow channel can be connected to an oil and gas pipeline;

[0010] A valve core is located in the inner cavity, the valve core has a sealing structure and a throttling structure, the sealing structure is rotatably arranged in the inner cavity, the sealing structure has a first channel, and the first channel can be connected to the flow channel; the throttling structure is rotatably arranged in the first channel, the throttling structure has a second channel, and the second channel can be connected to the first channel;

[0011] The elastic structure is drivingly connected to the sealing structure, and the sealing structure can rotate until the first channel is connected to the flow channel, and can be rotated until the first channel is isolated from the flow channel under the drive of the elastic structure.

[0012] In a specific embodiment, a driving structure is provided between the throttling structure and the sealing structure. When the throttling structure is driven and connected to the sealing structure through the driving structure, the sealing structure can be driven to the first channel to be connected to the flow channel. When the throttling structure is separated from the sealing structure, the throttling structure can be rotated to the second channel to be connected to the first channel.

[0013] In a specific embodiment, when the sealing structure is driven to a state where the first channel is blocked from the flow passage, the throttling structure is separated from the sealing structure.

[0014] In a specific embodiment, the sealing structure comprises a sealing body and a first transmission member connected to the outside of the sealing body, and the first channel is formed through the sealing body;

[0015] The throttling structure comprises a throttling body and a second transmission member connected to the outside of the throttling body, and the second channel is formed through the throttling body;

[0016] The second transmission member is rotatably disposed in the first transmission member and is drivingly connected to the first transmission member.

[0017] In a specific embodiment, the elastic structure has a transmission rod, which is movably arranged in the valve body and has one end meshingly connected with the first transmission member.

[0018] In a specific embodiment, an elastic member and an adjusting member are sequentially provided at one end of the transmission rod away from the first transmission member, and one end of the adjusting member is connected to the valve body.

[0019] In a specific embodiment, the elastic structure also has a locking piece and at least one locking groove, at least one of the locking grooves is opened on the outer peripheral wall of the transmission rod, a radial through hole is provided in the valve body, one end of the locking piece is passed through the radial through hole and can be clamped in at least one of the locking grooves.

[0020] In a specific embodiment, the valve device further includes a reset structure, the reset structure includes a reset paddle and a reset elastic member, the first transmission member is provided with a reset rod, one end of the reset paddle is rotatably arranged on the valve body, and the other end of the reset paddle is connected to the reset rod;

[0021] The reset elastic member is compressibly connected between the reset paddle and the inner wall of the valve body along the rotation direction of the reset paddle.

[0022] In a specific embodiment, the driving structure has input teeth and output teeth that are connected in driving relation, the end of the second transmission member passing through the first transmission member is meshedly connected to the input teeth, and the output teeth are meshedly connected to the first transmission member.

[0023] In a specific embodiment, a transmission element is provided in the driving structure, an input end of the transmission element meshes with the input teeth, an output end of the transmission element meshes with the output teeth, and the number of teeth at the input end is greater than the number of teeth at the output end.

[0024] Compared with the prior art, the technical solution described in the utility model has the following characteristics and advantages:

[0025] The valve device provided by the utility model can flexibly adjust the connection relationship between the three channels according to the pressure changes of the oil and gas pipelines through the cooperation of the first channel, the second channel and the flow channel. While realizing the emergency cut-off function, it can also adjust the flow cross-sectional area of ​​the valve core relative to the valve body, thereby realizing the throttling adjustment function of the valve core relative to the valve body.

[0026] Furthermore, the throttling structure is arranged in the first channel of the sealing structure. In the emergency situation where the pressure of the oil and gas pipeline is too high, the coordinated rotation of the sealing structure and the elastic structure can quickly cut off the connection between the second channel of the throttling structure and the flow channel, thereby achieving an emergency shutoff effect. Compared with the structure in which a throttling valve and a shutoff valve are arranged on a pipeline at the same time, the valve closing efficiency can be significantly improved, and the volume of the valve device can be reduced, so that the valve device can be installed at the wellhead of some smaller oil and gas wells.

[0027] Furthermore, by setting the throttling structure in the internal flow channel of the sealing structure, it is also possible to avoid the situation in which, when the throttling valve and the shut-off valve are separately arranged, valve closing oscillation occurs in the pipeline after the shut-off valve is urgently shut off, thereby affecting the structural safety of the pipeline, thereby improving the overall structural safety of the valve device. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a structural diagram of the valve device of the utility model;

[0029] Figure 2 It is a structural diagram of the elastic structure of the valve device of the utility model;

[0030] Figure 3 This is a structural diagram of the driving structure of the valve device of the utility model;

[0031] Figure 4 This is a first state diagram of the valve device of the utility model;

[0032] Figure 5 This is a second state diagram of the valve device of the utility model;

[0033] Figure 6 This is a third state diagram of the valve device of the present utility model.

[0034] Description of Figure Numbers:

[0035] 1. Valve body; 11. Inner cavity; 12. Flow channel; 13. Radial perforation;

[0036] 2. valve core; 21. sealing structure; 211. first channel; 212. first transmission member; 213. sealing body; 22. throttling structure; 221. second channel; 222. throttling body; 223. second transmission member;

[0037] 3. Elastic structure; 31. Transmission rod; 32. Elastic member; 33. Adjusting member; 34. Locking member; 35. Locking groove;

[0038] 4. Driving structure; 41. Input teeth; 42. Output teeth;

[0039] 5. Reset structure; 51. Reset paddle; 52. Reset lever. DETAILED DESCRIPTION

[0040] In order to enable those skilled in the art to better understand the technical solutions in the present invention, 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, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0041] It should be noted that when an element is referred to as being "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only embodiment.

[0042] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0043] like Figure 1 and Figure 2 As shown, the utility model provides a valve device, comprising:

[0044] The valve body 1 has an inner cavity 11 and a flow channel 12 which are connected to each other, and the flow channel 12 can be connected to the oil and gas pipeline;

[0045] The valve core 2 is located in the inner cavity 11. The valve core 2 has a sealing structure 21 and a throttling structure 22. The sealing structure 21 is rotatably arranged in the inner cavity 11. The sealing structure 21 has a first channel 211, and the first channel 211 can be connected to the flow channel 12; the throttling structure 22 is rotatably arranged in the first channel 211. The throttling structure 22 has a second channel 221, and the second channel 221 can be connected to the first channel 211;

[0046] The elastic structure 3 is drivingly connected to the sealing structure 21 . The sealing structure 21 can rotate until the first channel 211 is connected to the flow channel 12 , and can also rotate under the drive of the elastic structure 3 until the first channel 211 is isolated from the flow channel 12 .

[0047] The valve device provided by the utility model can flexibly adjust the connection relationship between the three channels according to the pressure changes of the oil and gas pipelines through the cooperation of the first channel 211, the second channel 221 and the flow channel 12. While realizing the emergency cut-off function, it can also adjust the flow cross-sectional area of ​​the valve core 2 relative to the valve body 1, thereby realizing the throttling adjustment function of the valve core 2 relative to the valve body 1.

[0048] Furthermore, the throttling structure 22 is arranged in the first channel 211 of the sealing structure 21. In an emergency situation where the pressure of the oil and gas pipeline is too high, the sealing structure 21 and the elastic structure 3 rotate in coordination to quickly cut off the connection between the second channel 221 of the throttling structure 22 and the flow channel 12, thereby achieving an emergency shutoff effect. Compared with a structure in which a throttling valve and a shutoff valve are arranged on a pipeline at the same time, the valve closing efficiency can be significantly improved, and the volume of the valve device can be reduced, so that the valve device can be installed at the wellhead of some smaller oil and gas wells.

[0049] Furthermore, by setting the throttling structure 22 in the internal flow channel 12 of the sealing structure 21, it is also possible to avoid the situation in which, when the throttling valve and the shut-off valve are separately arranged, valve closing oscillation occurs in the pipeline after the shut-off valve is shut off in an emergency, thereby affecting the structural safety of the pipeline, thereby improving the overall structural safety of the valve device.

[0050] Specifically in the present embodiment, the two ends of the valve body 1 are respectively connected to the upstream and downstream oil and gas pipes of the oil and gas pipeline. An inner cavity 11 is provided inside the valve body 1. The flow channel 12 connects the inner cavity 11, that is, one flow channel 12 connects the inner cavity 11 with the downstream pipeline of the oil and gas pipeline, and the other flow channel 12 connects the inner cavity 11 with the upstream pipeline of the oil and gas pipeline. The valve core 2 is arranged in the inner cavity 11, and the sealing mechanism is generally a sphere with a through first channel 211. The throttling structure 22 is rotatably arranged in the first channel 211. The throttling structure 22 is generally a sphere with a through second channel 221. In other embodiments, there is no limitation on the specific forms of the throttling structure 22 and the sealing structure 21.

[0051] In this embodiment, the sealing structure 21 is rotatably arranged in the inner cavity 11. The openings at both ends of the first channel 211 can be rotated to face the inner cavity 11 wall of the valve body 1 or to communicate with the flow channel 12 when rotating. The valve device is opened or the valve device is urgently shut off by the rotation of the sealing structure 21 in the inner cavity 11. In this embodiment, the elastic structure 3 is arranged in the valve body 1. In one embodiment, the elastic structure 3 can be arranged in the inner cavity 11. In another embodiment, the elastic structure 3 can also be arranged inside the valve body 1. There is no specific limitation on this. In this embodiment, the elastic structure 3 is generally a compressible elastic structure 3. In the process of the sealing structure 21 rotating in the direction of the first channel 211 communicating with the flow channel 12, the elastic structure 3 can be compressed. When the sealing structure 21 needs to be shut off, the compression force of the elastic structure 3 is released. The elastic structure 3 can drive the sealing structure 21 to rotate in the direction of isolating the first channel 211 from the flow channel 12, that is, the rotation of the sealing structure 21, to achieve the rapid shutoff effect of the sealing structure 21.

[0052] Related References Figures 4 to 6 As shown, in the present embodiment, the throttling structure 22 is rotatably disposed in the first channel 211, and the rotation direction of the throttling structure 22 is the same as the rotation direction of the sealing structure 21, and the throttling structure 22 rotates along the circumference of the sealing structure 21; in other embodiments, the rotation direction of the throttling structure 22 may also be different from the rotation direction of the sealing structure 21, for example, the rotation plane of the throttling structure 22 is perpendicular to the rotation plane of the sealing structure 21, the first channel 211 of the sealing structure 21 rotates on the horizontal plane to be connected with the flow channel 12, and the second channel 221 of the throttling structure 22 rotates on the vertical plane to be connected with the first channel 211, and no specific restrictions are imposed on the rotation directions of the throttling structure 22 and the sealing structure 21, so as to realize that the first channel 211 can be rotatably connected with the flow channel 12, and the second channel 221 can be rotatably connected with the first channel 211.

[0053] like Figure 1 , Figure 2 and Figure 3 As shown, in a specific embodiment, a driving structure 4 is provided between the throttling structure 22 and the sealing structure 21. When the throttling structure 22 is driven and connected to the sealing structure 21 through the driving structure 4, the sealing structure 21 can be driven to the first channel 211 to be connected to the flow channel 12. When the throttling structure 22 is separated from the sealing structure 21, the throttling structure 22 can be rotated to the second channel 221 to be connected to the first channel 211.

[0054] The valve device provided by the utility model can drive the valve core 2 of the entire valve device to rotate by rotating only one structure through the driving structure 4, which is conducive to improving the valve opening efficiency of the valve device and avoiding the problem of too low valve opening efficiency of the valve device caused by using multiple steps to open the valve. In this embodiment, the throttling structure 22 can drive the sealing structure 21 to rotate, and after the sealing structure 21 rotates to the right position, the throttling structure 22 can rotate alone to connect the first channel 211 and the second channel 221, thereby achieving the effect of opening the gate first and then throttling.

[0055] In this embodiment, the sealing structure 21 and the throttling structure 22 are connected through the driving structure 4, and the driving structure 4 drives the sealing structure 21 to rotate until the first channel 211 is connected to the flow channel 12; one of the sealing structure 21 and the throttling structure 22 is separated from the driving structure 4, the sealing structure 21 stops rotating, and the throttling structure 22 can continue to rotate until the second channel 221 is connected to the first channel 211, thereby improving the overall valve opening efficiency. Furthermore, the second channel 221 of the throttling structure 22 can be set with different rotation angles according to the pressure of the oil and gas pipeline to adjust the flow cross-sectional area in the valve body 1, that is, to realize the throttling function of the valve body 1.

[0056] Specifically in this embodiment, a driving structure 4 is provided between the throttling structure 22 and the sealing structure 21. In one specific embodiment, the driving structure 4 may be a reduction gear set. In other specific embodiments, the driving structure 4 may also be other transmission structures, which are not specifically limited. In this embodiment, when the throttling structure 22 rotates in the first channel 211, the throttling structure 22 drives the transmission member inside the driving structure 4 to rotate, and the transmission member inside the driving structure 4 then drives the sealing structure 21 to rotate, so that the throttling structure 22 drives the sealing structure 21 to rotate.

[0057] In this embodiment, the driving structure 4 has a transmission component connected to a portion of the sealing structure 21, that is, during the initial rotation of the throttling structure 22, the throttling structure 22 can drive the sealing structure 21 to rotate together through the driving structure 4, so that the first channel 211 of the sealing structure 21 is connected to the flow channel 12, and at the same time, the sealing structure 21 can drive the elastic structure 3 to compress. When the first channel 211 of the sealing structure 21 is rotated to a state where it is fully connected to the flow channel 12, the throttling structure 22 continues to rotate, and the throttling structure 22 drives the driving structure 4 to rotate, and the transmission component of the driving structure 4 is disconnected from the sealing structure 21, that is, the throttling structure 22 is separated from the sealing structure 21, and the elastic structure 3 is locked, so that the sealing structure 21 is fixed in this position and does not rotate. At this time, the throttling structure 22 can flexibly adjust the rotation angle of the second channel 221 according to the operation of the operator, that is, flexibly adjust the flow cross-sectional area of ​​the second channel 221 and the first channel 211, so as to achieve the throttling adjustment effect of the throttling structure 22.

[0058] In this embodiment, sensors can be set in the oil and gas pipeline, as well as in the first channel 211 and the second channel 221 to collect parameters such as pipe pressure and flow. When the pipe pressure or flow at various locations tends to the set parameters, the throttling structure 22 is not adjusted. When the pipe pressure or flow at various locations is higher than the set parameters, the throttling structure 22 can be driven to rotate to flexibly adjust the pipe pressure or flow at various locations; if the pipe pressure or flow at various locations is higher than the safety parameters, the elastic structure 3 is unlocked, and the elastic structure 3 drives the sealing structure 21 to rotate to achieve cutoff.

[0059] like Figure 1 and Figure 2 As shown, in a specific embodiment, when the sealing structure 21 is driven to a state where the first channel 211 is blocked from the flow channel 12 , the throttling structure 22 is separated from the sealing structure 21 .

[0060] The valve device provided by the utility model limits the separation of the throttling structure 22 and the sealing structure 21 when the sealing structure 21 is driven by the elastic structure 3 to a state where the first channel 211 is blocked from the flow channel 12. This can avoid the problem that during the rotation of the sealing structure 21, the elastic structure 3 not only needs to push the sealing structure 21 to rotate, but also needs to push the throttling structure 22 to rotate. This can make the rotation rate and rotation efficiency of the sealing structure 21 higher, and achieve the sealing effect more quickly.

[0061] Specifically, in the present embodiment, the sealing structure 21 and the throttling structure 22 are connected via the driving structure 4. During the forward rotation of the sealing structure 21, the throttling structure 22 pushes the sealing structure 21 to rotate via the driving structure 4. When the sealing structure 21 rotates to the state where the first channel 211 is connected to the flow channel 12, the driving structure 4 is separated from the sealing structure 21. When the pressure change of the oil and gas pipeline exceeds the safety value, the elastic structure 3 is unlocked to push the sealing structure 21 to rotate. During the rotation process, the sealing structure 21 is always in a separated state from the driving structure 4, that is, the throttling structure 22 is in a separated state from the sealing structure 21. In other embodiments, when the sealing structure 21 rotates to the state where the first channel 211 is connected to the flow channel 12, the driving structure 4 can also be separated from the throttling structure 22. Then, when the elastic structure 3 pushes the sealing structure 21 to rotate to the state where the first channel 211 is blocked from the flow channel 12, the throttling structure 22 is in a separated state from the driving structure 4. There is no specific limitation on the separation method of the throttling structure 22 and the sealing structure 21.

[0062] like Figure 1 and Figure 2 As shown, in a specific embodiment, the sealing structure 21 has a sealing body 213 and a first transmission member 212 connected to the outside of the sealing body 213, and a first channel 211 is formed through the sealing body 213;

[0063] The throttling structure 22 comprises a throttling body 222 and a second transmission member 223 connected to the outside of the throttling body 222, and a second channel 221 is formed through the throttling body 222;

[0064] The second transmission member 223 is rotatably disposed in the first transmission member 212 and is drivingly connected to the first transmission member 212 .

[0065] The valve device provided by the utility model, by limiting the specific structure of the sealing structure 21, provides a specific structure in which the sealing structure 21 can completely sleeve the throttling structure 22, facilitates the stable connection between the sealing structure 21 and the throttling structure 22, and provides a structure that is convenient for transmission through rotation.

[0066] Specifically, in this embodiment, the sealing body 213 of the sealing structure 21 is rotatably arranged in the inner cavity 11, and the first channel 211 is formed through the sealing body 213. The sealing body 213 of this embodiment is generally circular. In other embodiments, the specific shape of the sealing body 213 is not specifically limited. The top of the sealing body 213 of this embodiment is connected with a first transmission member 212. The first transmission member 212 is generally a gear rod with teeth on the inner wall. The first transmission member 212 is arranged upward in the vertical direction. In other embodiments, the specific structure of the first transmission member 212 is not limited. In this embodiment, the first transmission member 212 has a cavity inside, and the cavity of the first transmission member 212 is connected to the first channel 211 for accommodating the throttling structure 22. In this embodiment, the throttling body 222 of the throttling structure 22 is rotatably arranged in the first channel 211. The throttling body 222 of this embodiment is generally a sphere. In other embodiments, the specific shape of the throttling body 222 is not limited. In the present embodiment, the second transmission member 223 is generally a gear shaft with circumferential teeth. The second transmission member 223 is arranged upward in the vertical direction. The second transmission member 223 is inserted into the cavity of the first transmission member 212. The second transmission member 223 is driven and connected to the first transmission member 212. In the present embodiment, the second transmission member 223 is meshed and connected to the first transmission member 212 through the driving structure 4. In other embodiments, there is no specific restriction on the driving connection method between the second transmission member 223 and the first transmission member 212.

[0067] like Figure 1 and Figure 2 As shown, in a specific embodiment, the elastic structure 3 has a transmission rod 31 , which is movably disposed in the valve body 1 , and one end of which is meshed and connected with the first transmission member 212 .

[0068] The valve device provided by the utility model provides a way of connecting the elastic structure 3 with the first transmission member 212 by limiting the specific form of the elastic structure 3 , that is, provides a way of driving the elastic structure 3 by the rotation of the sealing structure 21 .

[0069] Specifically in the present embodiment, a rack is provided at one end of the transmission rod 31 of the elastic structure 3. In other embodiments, there is no restriction on the specific structural form of the elastic structure 3. In the present embodiment, gears are provided on the inner wall circumference and the outer wall circumference of the first transmission member 212. The rack of the transmission rod 31 of the elastic structure 3 is meshed with the outer wall of the first transmission member 212 with teeth. The transmission rod 31 is driven to move along its own axial direction through the rotation of the first transmission member 212. The other end of the transmission rod 31 is connected to the retractable elastic device in the elastic structure 3. When the transmission rod 31 moves away from the first transmission member 212, the elastic device can be compressed or stretched to accumulate energy. When the sealing structure 21 needs to rotate in the direction where the first channel 211 is blocked from the flow channel 12, the elastic device is unlocked and released. The elastic device pushes the transmission rod 31 to move in the direction close to the first transmission member 212, thereby driving the first transmission member 212 to rotate, thereby driving the sealing structure 21 to rotate.

[0070] like Figure 1 and Figure 2 As shown, in a specific embodiment, an end of the transmission rod 31 away from the first transmission member 212 is provided with an elastic member 32 and an adjusting member 33 in sequence, and one end of the adjusting member 33 is connected to the valve body 1 .

[0071] The valve device provided by the utility model can flexibly adjust the height of the adjusting member 33 according to how much rotational force the elastic structure 3 needs to apply to the sealing structure 21 by setting the elastic member 32 and the adjusting member 33, so as to avoid the situation where the force provided by the elastic member 32 is too little, resulting in the sealing structure 21 being unable to rotate to the first channel 211 and blocking the flow channel 12 when the liquid in the flow channel 12 is at a high flow rate; at the same time, it can also avoid the situation where the force provided by the elastic member 32 is too great, resulting in the sealing structure 21 rotating at an excessively large angle during the rotation process, resulting in the first channel 211 being blocked from the flow channel 12 first, and then continuing to rotate, resulting in the first channel 211 being connected to the flow channel 12.

[0072] Specifically in this embodiment, the elastic member 32 can be a structure such as a spring that can be compressed and store force. In other embodiments, the specific structure of the elastic member 32 is not limited; in this embodiment, the adjustment member 33 is a height-adjustable gasket. In other embodiments, the specific structure of the adjustment member 33 is not limited. In this embodiment, the elastic member 32 is compressibly arranged along the axial direction of the transmission rod 31, and the adjustment member 33 is height-adjustably connected between the elastic member 32 and the inner wall of the valve body 1.

[0073] like Figure 1and Figure 2 As shown, in a specific embodiment, the elastic structure 3 also has a locking piece 34 and at least one locking groove 35, at least one locking groove 35 is opened on the outer peripheral wall of the transmission rod 31, a radial through hole 13 is provided in the valve body 1, one end of the locking piece 34 is penetrated in the radial through hole 13 and can be clamped in at least one locking groove 35.

[0074] The valve device provided by the utility model achieves the effect of locking the transmission rod 31 by providing a locking groove 35 on the outer peripheral wall of the transmission rod 31 and arranging a locking member 34 that matches the locking groove 35. After the sealing structure 21 compresses the elastic member 32, when the throttling structure 22 is disconnected from the sealing structure 21, it is avoided that the elastic member 32 directly drives the sealing structure 21 to rotate through the transmission rod 31 without the operation of the operator; that is, it is avoided that the opening and closing of the sealing structure 21 is out of control.

[0075] In this embodiment, the locking groove 35 is formed on the outer peripheral wall of the transmission rod 31. When the sealing structure 21 drives the transmission rod 31 to move and the sealing structure 21 is driven to a state where the throttling structure 22 is disconnected from the sealing structure 21, the transmission rod 31 moves until its locking groove 35 is aligned with the radial through hole 13 on the valve body 1. The transmission rod 31 is locked by passing the locking piece 34 through the radial through hole 13 and clamping it in the locking groove 35.

[0076] like Figure 1 and Figure 2 As shown, in a specific embodiment, the valve device further includes a reset structure 5, the reset structure 5 has a reset paddle 51 and a reset elastic member 32, a reset rod 52 is provided on the first transmission member 212, one end of the reset paddle 51 is rotatably disposed on the valve body 1, and the other end of the reset paddle 51 is connected to the reset rod 52;

[0077] The reset elastic member 32 is compressibly connected between the reset paddle 51 and the inner wall of the valve body 1 along the rotation direction of the reset paddle 51 .

[0078] The valve device provided by the utility model can solve the problem that when the driving structure 4 and the sealing structure 21 are partially driven and connected, there is a risk of meshing and hitting the teeth in the connection relationship between the driving structure 4 and the sealing structure 21, that is, during the forward rotation of the sealing structure 21, since the force accumulated by the elastic member 32 has a decay rate, the gears of the sealing structure 21 and the gears of the driving structure 4 may be misaligned or hit during the rotation of the sealing structure 21, which will cause the cutoff function of the entire valve device to fail. Therefore, adding the reset structure 5 can store force according to the rotation angle of the sealing structure 21, and apply thrust or pulling force according to the rotation of the sealing structure 21, to ensure that the sealing structure 21 stays at its initial position after rotation.

[0079] In this embodiment, the reset structure 5 includes a reset paddle 51 that can rotate on the valve body 1, one end of the reset paddle 51 is a fixed end, which is rotatably connected to the valve body 1, and the other end of the reset paddle 51 is a free end, which can be movably connected to the sealing structure 21; a reset rod 52 is convexly provided on the first transmission member 212 of the sealing structure 21 of this embodiment, and the free end of the reset paddle 51 is movably connected to the reset rod 52. In other embodiments, the free end of the reset paddle 51 can also abut against the reset rod 52, and there is no specific limitation to this; in this embodiment, the reset elastic member 32 is a compressible spring, and the spring of the reset elastic member 32 is arranged along the circumference of the fixed end of the reset paddle 51, and compresses or stretches the reset elastic member 32 when the reset paddle 51 rotates, and the reset elastic member 32 is locked by the locking member 34 and the locking groove 35 on the transmission rod 31. In other embodiments, there is no specific limitation on the form of the reset elastic member 32 and the connection method between the reset paddle 51 and the reset rod 52.

[0080] like Figure 2 and Figure 3 As shown, in a specific embodiment, the driving structure 4 has an input tooth 41 and an output tooth 42 that are connected in driving relation, the second transmission member 223 passes through the end of the first transmission member 212 and is meshedly connected to the input tooth 41 , and the output tooth 42 is meshedly connected to the first transmission member 212 .

[0081] The valve device provided by the utility model provides a connection relationship between the first transmission member 212 and the second transmission member 223 by limiting the specific structure of the driving structure 4 .

[0082] In this embodiment, the driving structure 4 has an input tooth 41 and an output tooth 42 that are transmission-connected. The second transmission member 223 passes through the end of the first transmission member 212. The second transmission member 223 passes through the outer periphery of one end of the first transmission member 212 and is provided with teeth. The first transmission member 212 is meshed and connected with the output tooth 42. The outer periphery of the tooth of the second transmission member 223 is meshed and connected with the input tooth 41. The second transmission member 223 drives the input tooth 41 to rotate by rotating. The input tooth 41 drives the output tooth 42 to rotate. The output tooth 42 drives the first transmission member 212 to rotate, thereby driving the sealing structure 21 to rotate.

[0083] In this embodiment, teeth are arranged on part of the circumference of the output tooth 42, that is, there are two states in which the output tooth 42 is connected to the sealing structure 21 and is separated from it. The throttling structure 22 drives the sealing structure 21 to rotate in the direction in which the first channel 211 is connected to the flow channel 12 through the driving structure 4. At this time, the output tooth 42 is connected to the first transmission member 212 of the sealing structure 21. When the first channel 211 is connected to the flow channel 12, the throttling structure 22 continues to rotate and drives the output tooth 42 to rotate through the input tooth 41. At this time, the tooth circumference of the output tooth 42 is separated from the first transmission member 212.

[0084] In a specific embodiment, a transmission element is provided in the driving structure 4 , the input end of the transmission element meshes with the input teeth 41 , the output end of the transmission element meshes with the output teeth 42 , and the number of teeth at the input end is greater than the number of teeth at the output end.

[0085] The valve device provided by the utility model can realize that when the throttling structure 22 rotates multiple circles, the sealing structure 21 rotates one circle by setting a speed change part, thereby improving the reduction ratio between the throttling structure 22 and the sealing structure 21, so that the input force when the throttling structure 22 rotates can be converted into a larger output torque, which is convenient for rotating the sealing structure 21.

[0086] Specifically in the present embodiment, the speed changing member in the driving structure 4 is generally two coaxially arranged gears with different numbers of teeth, wherein the number of teeth at the input end is greater than the number of teeth at the output end, which can achieve the effect of changing the reduction ratio. In the present embodiment, the second transmission member 223 is meshed and connected with the input end through the input teeth 41, and the first transmission member 212 is meshed and connected with the output end through the output teeth 42, that is, the effect of the input teeth 41 rotating multiple circles and the output teeth 42 rotating one circle is achieved.

[0087] The specific embodiments described above further illustrate the purpose, technical solutions and beneficial effects of the utility model in detail. It should be understood that the above description is only a specific embodiment of the utility model and is not intended to limit the scope of protection of the utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the utility model should be included in the scope of protection of the utility model.

Claims

1. A valve device, characterized in that: include: A valve body having an inner cavity and a flow channel connected to each other, wherein the flow channel can be connected to an oil and gas pipeline; A valve core is located in the inner cavity, the valve core has a sealing structure and a throttling structure, the sealing structure is rotatably arranged in the inner cavity, the sealing structure has a first channel, and the first channel can be connected to the flow channel; the throttling structure is rotatably arranged in the first channel, the throttling structure has a second channel, and the second channel can be connected to the first channel; The elastic structure is drivingly connected to the sealing structure, and the sealing structure can rotate until the first channel is connected to the flow channel, and can be rotated until the first channel is isolated from the flow channel under the drive of the elastic structure.

2. The valve device according to claim 1, characterized in that A driving structure is provided between the throttling structure and the sealing structure. When the throttling structure is driven and connected to the sealing structure through the driving structure, the sealing structure can be driven until the first channel is connected to the flow channel. When the throttling structure is separated from the sealing structure, the throttling structure can be rotated until the second channel is connected to the first channel.

3. The valve device according to claim 2, characterized in that When the sealing structure is driven to a state where the first passage is blocked from the flow channel, the throttling structure is separated from the sealing structure.

4. The valve device according to claim 2 or 3, characterized in that: The sealing structure comprises a sealing body and a first transmission member connected to the outside of the sealing body, and the first channel is formed through the sealing body; The throttling structure comprises a throttling body and a second transmission member connected to the outside of the throttling body, and the second channel is formed through the throttling body; The second transmission member is rotatably disposed in the first transmission member and is drivingly connected to the first transmission member.

5. The valve device according to claim 4, characterized in that The elastic structure has a transmission rod, which is movably arranged in the valve body and one end of which is meshed and connected with the first transmission member.

6. The valve device according to claim 5, characterized in that An end of the transmission rod away from the first transmission member is provided with an elastic member and an adjusting member in sequence, and one end of the adjusting member is connected to the valve body.

7. The valve device according to claim 5, characterized in that The elastic structure also has a locking piece and at least one locking groove, at least one of the locking grooves is opened on the outer peripheral wall of the transmission rod, a radial through hole is arranged in the valve body, one end of the locking piece is passed through the radial through hole and can be clamped in at least one of the locking grooves.

8. The valve device according to claim 4, characterized in that The valve device further comprises a reset structure, the reset structure comprising a reset paddle and a reset elastic member, the first transmission member is provided with a reset rod, one end of the reset paddle is rotatably arranged on the valve body, and the other end of the reset paddle is connected to the reset rod; The reset elastic member is compressibly connected between the reset paddle and the inner wall of the valve body along the rotation direction of the reset paddle.

9. The valve device according to claim 4, characterized in that The driving structure comprises an input tooth and an output tooth which are connected in driving relation. The end of the second transmission member passing through the first transmission member is meshed and connected with the input tooth. The output tooth is meshed and connected with the first transmission member.

10. The valve device according to claim 9, characterized in that A speed change member is provided in the driving structure, an input end of the speed change member is meshed with the input teeth, an output end of the speed change member is meshed with the output teeth, and the number of teeth at the input end is greater than the number of teeth at the output end.

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