A gas wellhead mechanism for natural gas extraction

Abstract

The present invention discloses a gas wellhead mechanism for natural gas extraction, which relates to the field of underground coal gasification technology, and aims to solve the technical problem that the existing gas wellhead mechanism has a single function and insufficient sealing, which results in the need to rely on the stacking of multiple complex structures and increases the manufacturing cost, and includes a first connecting seat, two four-way connections, a second connecting seat located above the first connecting seat, and a positioner. The present invention avoids the waste of resources on the one hand by designing a connecting component, an elastic component, an adjusting component, and an alarm component, and on the other hand, the device can achieve the effect of quickly sealing the connecting component, thereby providing more time for subsequent personnel to react and operate. At the same time, the device only needs to complete the primary and secondary fixation of the device by assembling bolts, thereby improving the safety of the device when in use and reducing the difficulty of assembling the device.

Description

Technical Field

[0001] The present invention relates to the technical field of underground coal gasification, and more specifically to a gas production wellhead mechanism for natural gas production. Background Art

[0002] As the core component of the wellhead device, the Christmas tree plays a vital role. It not only simplifies wellhead operations, such as opening and closing wells, regulating natural gas pressure and production, but also integrates a variety of maintenance functions, such as pressure gauge testing, wellhead pressure monitoring and small salvage operations, greatly improving production efficiency and operational flexibility.

[0003] However, many imported oil (gas) trees on the market, although relatively perfect in structural design, have exposed some problems in practical application. In particular, its complex valve control system is often difficult to respond quickly once one or some valves fail. At this time, relying on complex and potentially slow emergency closure devices and alarm systems not only increases the difficulty of maintenance, but may also delay the processing time at critical moments. In addition, the sealing guarantee of existing valves after assembly often relies on the stacking of multiple complex structures, which not only increases the manufacturing cost, but also appears to be single and not robust enough in actual effect, thus affecting the overall equipment utilization efficiency and cost-effectiveness. In view of this, we propose a gas wellhead mechanism for natural gas extraction. Summary of the invention

[0004] The purpose of the present invention is to provide a gas wellhead mechanism for natural gas extraction, so as to solve the technical problems that the existing gas wellhead mechanism has a single function and insufficient sealing, which requires it to rely on the stacking of multiple complex structures and increases the manufacturing cost.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: a gas wellhead mechanism for natural gas production, comprising:

[0006] The mounting mechanism comprises a first connecting seat, two four-way valves, a second connecting seat located above the first connecting seat, and a positioner, wherein the first connecting seat and the second connecting seat are connected via the four-way valve, and the positioner is arranged outside the four-way valve; and the control mechanism comprises a valve body, connecting components arranged on both sides of the valve body, an elastic component located in the connecting component, an adjusting component, a sealing gasket, an alarm component and an adjusting dial, wherein the adjusting component is located in the connecting component, the sealing gasket is arranged on one side of the connecting component, the alarm component is located outside the connecting component, and the adjusting component is located on the front side of the valve body.

[0007] On the one hand, the present invention avoids the waste of resources. On the other hand, the device can achieve the effect of quickly sealing the connection components, thereby providing more time for subsequent personnel to react and operate. At the same time, the device only needs to be fixed once and twice by assembling bolts, thereby improving the safety of the device during use and reducing the difficulty of assembling the device.

[0008] Preferably, the top of the first connection seat is connected to the spool located below, and the top of the spool located below is connected to the bottom of the second connection seat, and the top of the second connection seat is connected to the spool located above, and both sides of the two spools are fixedly connected with positioners;

[0009] The four-way valve is connected with two valve bodies through a positioner.

[0010] Preferably, the two sides of the valve body are respectively connected to the connecting disk and the connecting assembly, the connecting assembly is fixedly connected to the elastic assembly, a plurality of adjusting assemblies are fixedly connected inside the connecting assembly, one side of the connecting assembly is fixedly connected to the sealing gasket, the alarm assembly is located outside the connecting assembly, the adjusting dial is rotatably connected to the front side of the valve body, and the shape of the connecting disk arranged on one side of the valve body is adapted to the shape of the connecting assembly;

[0011] The valve bodies are connected via a connecting assembly.

[0012] Preferably, the connection assembly includes a flange, a plurality of placement holes and a plurality of mounting holes are provided on one side of the flange, a first liquid inlet hole is provided on one side of the flange, a second liquid inlet hole is provided on one side of the inner wall of the first liquid inlet hole, the first liquid inlet hole is connected to the second liquid inlet hole, the internal shapes of the first liquid inlet hole and the second liquid inlet hole are both conical, a storage groove is provided on one side of the flange, the storage groove is annular, and a plurality of limiting sliding grooves are provided on the other side of the flange;

[0013] The side of the flange plate having a plurality of limiting sliding grooves is connected to the valve body, the shape of the flange plate is adapted to the shape of the connecting plate on the other side of the valve body, the elastic component is fixedly connected to one side of the flange plate, the plurality of adjustment components are located in the plurality of placement holes, and the sealing gasket is fixedly connected in the storage groove.

[0014] Preferably, the elastic component comprises a support frame, one side of the support frame is fixedly connected to one end corresponding to the telescopic rod, a spring is connected to the outer cover of the telescopic rod, one end of the spring is fixedly connected to the outside of the telescopic rod, the other ends of the telescopic rod and the spring are fixedly connected to the sealing sheet, and the telescopic rod is a multi-section telescopic rod;

[0015] The support frame is fixedly connected to one side of the flange, and the sealing sheet is located in the first liquid inlet hole and the second liquid inlet hole.

[0016] Preferably, the adjustment assembly includes an extrusion sheet, one side of which is fixedly connected to the rotator, a connecting sheet is connected to the outer cover of the rotator, one end of the rotator passes through the connecting sheet and is engaged with the transmission device, one end of the rotator is fixedly connected to the pressure device, the pressure device is meshed with two followers, and a guide groove is provided on one side of the connecting sheet;

[0017] The other end of the pressure device is connected to the sealing gasket, the follower is slidably connected in the limiting sliding groove, the pressure device is fixedly connected outside the valve body, the transmission device is fixedly connected outside the flange, and the connecting plate is fixedly connected in the placement hole.

[0018] Preferably, the rotator comprises a rotating rod, a spiral blade is fixedly connected to the outside of the rotating rod, and two limiting grooves are arranged outside the rotating rod;

[0019] One end of the rotating rod is fixedly connected to the side corresponding to the extrusion plate, and one end of the rotating rod is fixedly connected to the pressure device through the connecting plate and the transmission device. The shapes of the rotating rod and the spiral blade are adapted to the shapes of the connecting plate and the guide groove opened in the connecting plate.

[0020] Preferably, the transmission device comprises a gear, a bearing is arranged inside the gear, the gear is fixedly connected to the inner ring of the bearing, a fixed leg is fixedly connected outside the bearing, and two limit blocks are fixedly connected inside the bearing;

[0021] The bearing is mutually clamped with the rotating rod through a limit block arranged on the inner ring, the outer ring of the bearing is fixedly connected with the flange through a fixing leg, and the gear is meshed with two driven devices.

[0022] Preferably, the pressure device comprises a sealing cylinder, a piston plate is slidably connected inside the sealing cylinder, a sleeve is fixedly connected to one side of the piston plate, a mounting block is fixedly connected to the outside of the sealing cylinder, the other side of the sealing cylinder is connected to the conduit, a limited telescopic column is tightly welded to one side of the mounting block, and the shape of the piston plate is adapted to the shape of the sealing cylinder;

[0023] One end of the rotating rod is rotatably connected in the sleeve, the sealing cylinder is connected to the sealing gasket through a conduit, and the other end of the limiting telescopic column is fixedly connected to the outer wall of the valve body;

[0024] The driven device comprises a tooth plate, one side of the tooth plate is fixedly connected to the reinforcing rib, the back side of the reinforcing rib is fixedly connected to a limit slider, and one side of the reinforcing rib is fixedly connected to an anti-slip plate;

[0025] The limiting sliding block is slidably connected in the limiting sliding groove, and the toothed plate is meshed with the gear.

[0026] Preferably, the alarm assembly comprises an alarm, the bottom end of the alarm is fixedly connected to an electric adjustment rod, and the bottom end of the electric adjustment rod is fixedly connected to a limit plate;

[0027] One side of the limiting plate overlaps with the corresponding side of the sealing plate, and the shape of the upper portion of the limiting plate matches the shape of the inner wall of the second liquid inlet hole.

[0028] Compared with the prior art, the present invention has the following beneficial effects:

[0029] 1. The present invention designs a connecting component, an elastic component, an adjusting component and an alarm component. When the connecting component provided with the elastic component on one side of the valve body is connected to the side corresponding to the four-way valve, the adjusting component will be squeezed by the contact with the four-way valve, thereby deforming, thereby further limiting the position of the bolts at the mounting holes. When gas is collected, the gas will enter the four-way valve and the second connecting seat along the first connecting seat and finally enter the connecting component respectively, so that the elastic component in the connecting component is squeezed and slides in the connecting component. After the elastic component squeezes the alarm component, the device can smoothly discharge the collected gas. When a fault occurs in the internal components of the valve body, the alarm will sound. The component will react quickly. At this time, the elastic component will move toward the inside of the connecting component again and seal the inside of the connecting component, so that the device can seal the valve body connecting component when the internal pressure of the valve body moves, thereby preventing natural gas from entering the valve body again. On the one hand, it avoids the waste of resources. On the other hand, the device can achieve the effect of quickly sealing the connecting component, thereby providing more time for subsequent personnel to react and operate. At the same time, the device only needs to complete the primary and secondary fixation of the device by assembling bolts, thereby improving the safety of the device when in use and reducing the difficulty of assembling the device.

[0030] 2. The present invention also designs an adjusting component. When the valve body is assembled, the extrusion sheet in the flange will first contact the connecting plate, so that the extrusion sheet is squeezed and the rotating rod and the spiral blade are pushed to move into the connecting plate. Since a guide groove is provided in the connecting plate, the spiral blade will drive the rotating rod to rotate and move synchronously after entering the guide groove. Since the rotating rod will slide in the bearing when moving and drive the limit block and the inner ring of the bearing to rotate when rotating, the gear will also rotate synchronously, so that the gear will withdraw the tooth plates and the anti-slide plate on both sides, so that the limit slide block slides in the limit slide groove. At the same time, the movement of the rotating rod will also push the piston plate to inject the air in the sealing cylinder into the conduit, so that the sealing gasket connected to the conduit expands rapidly. On the one hand, the movement of the anti-slide plate can fix the edge of the external bolt installed in the mounting hole. On the other hand, the expansion of the sealing gasket can further seal the gap between the connecting plate and the flange, so as to avoid leakage inside the device and improve the safety when using the device.

[0031] 3. The present invention also designs elastic components and alarm components. When the valve body leaks or an emergency occurs, the alarm will send out a signal. At this time, the alarm will start the electric adjustment rod, so that the electric adjustment rod drives the limit plate to reset. At this time, the limit plate will gradually separate from the sealing plate during the upward movement, so that after the sealing plate is separated from the limit, it will quickly move into the second liquid inlet hole under the pressure of the continuously inflowing natural gas. At this time, the sealing plate will seal the second liquid inlet hole, and when the personnel replace the valve body, they only need to close the side of the valve body with a fault through the valve outside the four-way valve, thereby reducing the difficulty of using the device. During use, the device can automatically close when a fixation occurs, avoiding greater losses caused by a fault and ensuring the safety of the device when in use. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0033] Figure 2 It is a schematic diagram of the control mechanism structure of the present invention;

[0034] Figure 3 It is a schematic diagram of the cross-sectional structure of the control mechanism of the present invention;

[0035] Figure 4 For the present invention Figure 3 The enlarged structural diagram at A in the middle;

[0036] Figure 5 For the present invention Figure 3 The enlarged structural diagram at B in the middle;

[0037] Figure 6 It is a schematic diagram of the structure of the connection assembly of the present invention;

[0038] Figure 7 It is a schematic diagram of the structure of the regulating component of the present invention;

[0039] Figure 8 It is a schematic diagram of the explosion structure of the regulating component of the present invention.

[0040] Description of the numbers in the figure:

[0041] 1. Installation mechanism; 2. Control mechanism;

[0042] 101, first connection seat; 102, cross; 103, second connection seat; 104, positioner;

[0043] 201, valve body; 202, connecting assembly; 203, elastic assembly; 204, adjusting assembly; 205, sealing gasket; 206, alarm assembly; 207, adjusting dial;

[0044] 202-1, flange; 202-2, placement hole; 202-3, mounting hole; 202-4, first liquid inlet hole; 202-5, second liquid inlet hole; 202-6, storage slot; 202-7, limit slide slot;

[0045] 203-1, support frame; 203-2, telescopic rod; 203-3, spring; 203-4, sealing sheet;

[0046] 204-1, extrusion plate; 204-2, rotator; 204-3, connecting plate; 204-4, transmission; 204-5, pressure device; 204-6, driven device;

[0047] 204-201, rotating rod; 204-202, spiral blade; 204-203, limiting groove;

[0048] 204-401, gear; 204-402, bearing; 204-403, limit block; 204-404, fixed leg;

[0049] 204-501, sealing cylinder; 204-502, piston plate; 204-503, sleeve; 204-504, mounting block; 204-505, guide tube; 204-506, position-limiting telescopic column;

[0050] 204-601, tooth plate; 204-602, reinforcing rib; 204-603, limit slider; 204-604, anti-skid plate;

[0051] 206-1, alarm; 206-2, electric adjustment rod; 206-3, limit plate. DETAILED DESCRIPTION

[0052] like Figures 1 to 8 As shown, the present invention relates to a gas wellhead mechanism for natural gas production, comprising:

[0053] The mounting mechanism 1 comprises a first connection seat 101, two cross-pieces 102, a second connection seat 103 located above the first connection seat 101, and a positioner 104, wherein the first connection seat 101 and the second connection seat 103 are connected through the cross-pieces 102, and the positioner 104 is arranged outside the cross-pieces 102; and the control mechanism 2 comprises a valve body 201, a connection assembly 202 arranged on both sides of the valve body 201, an elastic assembly 203 located in the connection assembly 202, an adjustment assembly 204, a sealing gasket 205, an alarm assembly 206 and an adjustment dial 207, wherein the adjustment assembly 20 4 is located in the connecting component 202, the sealing gasket 205 is arranged on one side of the connecting component 202, the alarm component 206 is located outside the connecting component 202, and the adjusting component 204 is located on the front of the valve body 201. By designing the connecting component 202, the elastic component 203, the adjusting component 204 and the alarm component 206, when the connecting component 202 provided with the elastic component 203 on one side of the valve body 201 is connected to the corresponding side of the cross 102, the adjusting component 204 will be squeezed by the contact with the cross 102, thereby deforming, so as to tighten the bolts at the mounting hole 202-3. The gas will enter the cross-way 102 and the second connection seat 103 along the first connection seat 101 and finally enter the connection assembly 202, so that the elastic component 203 in the connection assembly 202 is squeezed and slides in the connection assembly 202. After the elastic component 203 squeezes the alarm component 206, the device can smoothly discharge the collected gas. When the internal components of the valve body 201 fail, the alarm component 206 will react quickly. At this time, the elastic component 203 will lose the component and move to the inside of the connection assembly 202 again while the connection assembly 202 is pressed. The inside of the component 202 is sealed so that the device can seal the valve body 201 and the component 202 when the internal pressure of the valve body 201 moves, thereby preventing the natural gas from re-entering the valve body 201. On the one hand, it avoids the waste of resources. On the other hand, the device can achieve the effect of quickly sealing the connecting component 202, thereby providing more time for subsequent personnel to react and operate. At the same time, the device only needs to complete the primary and secondary fixation of the device by assembling bolts, thereby improving the safety of the device when in use and reducing the difficulty of assembling the device.

[0054] In the embodiment of the present invention, the top of the first connection seat 101 is connected to the cross-way 102 located below, and the top of the cross-way 102 located below is connected to the bottom of the second connection seat 103, and the top of the second connection seat 103 is connected to the cross-way 102 located above, and the two sides of the two cross-ways 102 are fixedly connected with positioners 104, and the cross-way 102 is connected to the two valve bodies 201 through the positioners 104. The two sides of the valve body 201 are respectively connected to the connection plate and the connection component 202, and the connection component 202 is fixedly connected to the elastic component 203, and a plurality of adjustment components 203 are fixedly connected in the connection component 202. 04, one side of the connecting component 202 is fixedly connected to the sealing gasket 205, the alarm component 206 is located outside the connecting component 202, the adjusting dial 207 is rotatably connected to the front of the valve body 201, the shape of the connecting disk set on one side of the valve body 201 is adapted to the shape of the connecting component 202, the valve body 201 is connected through the connecting component 202, and by designing the adjusting component 204, when the valve body 201 is assembled, the extrusion sheet 204-1 in the flange 202-1 will first contact the connecting disk, so that the extrusion sheet 204-1 is squeezed and the rotating rod 204-201 and the spiral blade 204-202 are pushed toward the connecting sheet 2 04-3 moves, since the connecting piece 204-3 is provided with a guide groove, the spiral blade 204-202 will drive the rotating rod 204-201 to rotate and move synchronously after entering the guide groove. Since the rotating rod 204-201 will slide in the bearing 204-402 when moving, and drive the limit block 204-403 and the inner ring of the bearing 204-402 to rotate when rotating, the gear 204-401 will also rotate synchronously, so that the gear 204-401 will withdraw the tooth plates 204-601 and the anti-slip plate 204-604 on both sides, so that the limit slider 204-603 is in the limit slide groove 202-7, and at the same time, the movement of the rotating rod 204-201 will also push the piston plate 204-502 to inject the air in the sealing cylinder 204-501 into the conduit 204-505, so that the sealing gasket 205 connected to the conduit 204-505 will expand rapidly. On the one hand, the movement of the anti-slip plate 204-604 can fix the edge of the external bolt installed in the mounting hole 202-3, and on the other hand, the expansion of the sealing gasket 205 can further seal the gap between the connecting plate and the flange 202-1, thereby avoiding leakage inside the device and improving the safety when using the device.

[0055] In an embodiment of the present invention, the connection assembly 202 includes a flange 202-1, a plurality of placement holes 202-2 and a plurality of mounting holes 202-3 are provided on one side of the flange 202-1, a first liquid inlet hole 202-4 is provided on one side of the flange 202-1, a second liquid inlet hole 202-5 is provided on one side of the inner wall of the first liquid inlet hole 202-4, the first liquid inlet hole 202-4 is connected to the second liquid inlet hole 202-5, the internal shapes of the first liquid inlet hole 202-4 and the second liquid inlet hole 202-5 are both conical, a storage groove 202-6 is provided on one side of the flange 202-1, and the storage groove 202-6 is annular, and a storage groove 202-6 is provided on the other side of the flange 202-1. There are a plurality of limiting grooves 202-7, one side of the flange 202-1 having a plurality of limiting grooves 202-7 is connected to the valve body 201, the shape of the flange 202-1 is adapted to the shape of the connecting plate on the other side of the valve body 201, the elastic component 203 is fixedly connected to one side of the flange 202-1, a plurality of adjustment components 204 are located in a plurality of placement holes 202-2, the sealing gasket 205 is fixedly connected to the storage slot 202-6, the elastic component 203 includes a support frame 203-1, one side of the support frame 203-1 is fixedly connected to the corresponding end of the telescopic rod 203-2, the telescopic rod 203-2 is outer-mounted with a spring 203-3, the spring 203-3 One end is fixedly connected to the outside of the telescopic rod 203-2, and the other ends of the telescopic rod 203-2 and the spring 203-3 are fixedly connected to the sealing sheet 203-4. The telescopic rod 203-2 is a multi-section telescopic rod. The support frame 203-1 is fixedly connected to one side of the flange 202-1. The sealing sheet 203-4 is located in the first liquid inlet hole 202-4 and the second liquid inlet hole 202-5. By designing the elastic component 203 and the alarm component 206, when the valve body 201 leaks or an emergency occurs, the alarm 206-1 will send a signal. At this time, the alarm 206-1 will start the electric adjustment rod 206-2, so that the electric adjustment rod 206-2 drives the limit plate 206-3 to return to the original position. When the valve body 201 is replaced, the personnel only need to close the side of the valve body 201 with a valve outside the four-way valve 102, thereby reducing the difficulty of using the device. During use, the device can be automatically closed when fixed, avoiding greater losses caused by failures and ensuring the safety of the device when in use.

[0056] As another embodiment of the present invention, the adjustment component 204 includes an extrusion sheet 204-1, one side of the extrusion sheet 204-1 is fixedly connected to the rotator 204-2, the outer sleeve of the rotator 204-2 is connected with a connecting sheet 204-3, one end of the rotator 204-2 passes through the connecting sheet 204-3 and is clamped with the transmission 204-4, one end of the rotator 204-2 is fixedly connected to the pressure device 204-5, the pressure device 204-5 is meshed with two followers 204-6, a guide groove is provided on one side of the connecting sheet 204-3, the other end of the pressure device 204-5 is connected to the sealing gasket 205, the follower 204-6 is slidably connected in the limiting slide groove 202-7, the pressure device 204-5 is fixedly connected to the outside of the valve body 201, and the transmission 204 -4 is fixedly connected to the outside of the flange 202-1, the connecting piece 204-3 is fixedly connected to the placement hole 202-2, the rotator 204-2 includes a rotating rod 204-201, the rotating rod 204-201 is fixedly connected to the spiral blade 204-202, the rotating rod 204-201 is provided with two limit grooves 204-203, one end of the rotating rod 204-201 is fixedly connected to the side corresponding to the extrusion sheet 204-1, one end of the rotating rod 204-201 passes through the connecting piece 204-3 and the transmission 204-4 and is fixedly connected to the pressure device 204-5, the shapes of the rotating rod 204-201 and the spiral blade 204-202 are adapted to the shapes of the connecting piece 204-3 and the guide groove provided in the connecting piece 204-3, the transmission 2 04-4 includes a gear 204-401, a bearing 204-402 is arranged inside the gear 204-401, the gear 204-401 is fixedly connected to the inner ring of the bearing 204-402, a fixed leg 204-404 is fixedly connected to the outside of the bearing 204-402, two limit blocks 204-403 are fixedly connected to the inside of the bearing 204-402, the bearing 204-402 is mutually clamped with the rotating rod 204-201 through the limit blocks 204-403 arranged on the inner ring, the outer ring of the bearing 204-402 is fixedly connected to the flange 202-1 through the fixed legs 204-404, the gear 204-401 is meshed with the two driven 204-6, and the first liquid inlet hole 202-4 and the first liquid inlet hole 202-6 are provided in the flange 202-1. There are two liquid inlet holes 202-5, and the cross-sections of the first liquid inlet hole 202-4 and the second liquid inlet hole 202-5 are both conical. Therefore, when the valve body 201 is not assembled, the sealing piece 203-4 can seal the first liquid inlet hole 202-4 to prevent the entry of external impurities. When in use, when natural gas enters the first liquid inlet hole 202-4, the gas pressure will push the sealing piece 203-4 to move and under the obstruction of the limiting piece 206-3, the natural gas will be discharged along the gap between the sealing piece 203-4 and the first liquid inlet hole 202-4. After the electric adjustment rod 206-2 adjusts the position of the limiting piece 206-3, the sealing piece 203-4 will quickly enter the second liquid inlet hole 202-5 along the first liquid inlet hole 202-4.Under the action of pressure, it fits with the inner wall of the second liquid inlet hole 202-5 to achieve the sealing effect on the first liquid inlet hole 202-4 and the second liquid inlet hole 202-5, thereby ensuring that the alarm 206-1 can quickly achieve the sealing effect on the valve body 201 after adjusting the position of the limit piece 206-3.

[0057] As another embodiment of the present invention, the pressure device 204-5 includes a sealing cylinder 204-501, a piston plate 204-502 is slidably connected inside the sealing cylinder 204-501, a sleeve 204-503 is fixedly connected to one side of the piston plate 204-502, a mounting block 204-504 is fixedly connected to the outside of the sealing cylinder 204-501, the other side of the sealing cylinder 204-501 is connected to the conduit 204-505, and a limited telescopic column 204-506 is tightly welded to one side of the mounting block 204-504. The shape of the piston plate 204-502 is consistent with that of the sealing cylinder 204 -501 is adapted to the shape of the valve body, one end of the rotating rod 204-201 is rotatably connected in the sleeve 204-503, the sealing cylinder 204-501 is connected to the sealing gasket 205 through the conduit 204-505, the other end of the limiting telescopic column 204-506 is fixedly connected to the outer wall of the valve body 201, and the follower 204-6 includes a tooth plate 204-601, one side of the tooth plate 204-601 is fixedly connected to the reinforcing rib 204-602, the back side of the reinforcing rib 204-602 is fixedly connected to the limiting slider 204-603, and one side of the reinforcing rib 204-602 is fixed The anti-slip plate 204-604 is connected, the limit slider 204-603 is slidably connected in the limit slide groove 202-7, the tooth plate 204-601 is meshed with the gear 204-401, the alarm component 206 includes an alarm 206-1, the bottom end of the alarm 206-1 is fixedly connected to the electric adjustment rod 206-2, the bottom end of the electric adjustment rod 206-2 is fixedly connected to the limit plate 206-3, one side of the limit plate 206-3 is overlapped with the side corresponding to the sealing plate 203-4, and the shape of the upper part of the limit plate 206-3 is consistent with the shape of the inner wall of the second liquid inlet hole 202-5. Adaptation, by using the extrusion sheet 204-1, the gear 204-401 and the piston plate 204-502, the device only needs to dock the adjustment component 204 on one side of the flange 202-1 with the connecting plate connected to the four-way 102, so that the connecting plate contacts the extrusion sheet 204-1 and pushes the extrusion sheet 204-1 to move, thereby completing the further limitation of the internal and external bolts set in the mounting hole 202-3 and increasing the volume of the sealing gasket 205. On the one hand, it can ensure the sealing performance of the device and the stability after installation, and on the other hand, it reduces the difficulty of using the device.

[0058] Working principle: This embodiment provides a gas wellhead mechanism for natural gas extraction. When in use, the control mechanism 2 and the four-way 102 need to be assembled. When the connecting assembly 202 with the elastic assembly 203 on one side of the valve body 201 is connected to the corresponding side of the four-way 102, the regulating assembly 204 will be squeezed by the contact with the four-way 102, thereby deforming, thereby further limiting the bolts at the mounting hole 202-3. When gas is extracted, the gas will enter the four-way 102 and the second connecting seat 103 along the first connecting seat 101 and finally enter the connecting assembly 202, so that the connecting assembly 202-3 is connected to the four-way 102. The elastic component 203 in the connecting component 202 is squeezed and slides in the connecting component 202, and after the elastic component 203 squeezes the alarm component 206, the device can smoothly discharge the collected gas, and when the internal components of the valve body 201 fail, the alarm component 206 will react quickly. At this time, the elastic component 203 will move into the connecting component 202 again and seal the inside of the connecting component 202, so that the device can seal the valve body 201 and the connecting component 202 when the internal pressure of the valve body 201 moves, so as to prevent the natural gas from entering the valve body 201 again;

[0059] When assembling the valve body 201, the extrusion sheet 204-1 in the flange 202-1 will first contact the connecting plate, so that the extrusion sheet 204-1 is squeezed and pushes the rotating rod 204-201 and the spiral blade 204-202 to move into the connecting plate 204-3. Since the connecting plate 204-3 is provided with a guide groove, the spiral blade 204-202 will drive the rotating rod 204-201 to rotate and move synchronously after entering the guide groove. Since the rotating rod 204-201 slides in the bearing 204-402 when moving, it drives the limit block 204-201 when rotating. 04-403 and the inner ring of the bearing 204-402 rotate, therefore, the gear 204-401 will also rotate synchronously, so that the gear 204-401 will withdraw the tooth plates 204-601 and the anti-slide plate 204-604 on both sides, so that the limiting slider 204-603 slides in the limiting slide groove 202-7, and at the same time, the movement of the rotating rod 204-201 will also push the piston plate 204-502 to inject the air in the sealing cylinder 204-501 into the conduit 204-505, so that the sealing pad 205 connected to the conduit 204-505 expands rapidly.

[0060] When the valve body 201 leaks or an emergency occurs, the alarm 206-1 will send a signal. At this time, the alarm 206-1 will start the electric adjustment rod 206-2, so that the electric adjustment rod 206-2 drives the limit plate 206-3 to reset. At this time, the limit plate 206-3 will gradually separate from the sealing plate 203-4 during the upward movement, so that the sealing plate 203-4 will quickly move into the second liquid inlet hole 202-5 under the pressure of the continuously inflowing natural gas after it is separated from the limit. At this time, the sealing plate 203-4 will seal the second liquid inlet hole 202-5, and when the personnel replace the valve body 201, they only need to close the side of the valve body 201 with a fault through the valve outside the four-way 102;

[0061] By opening the first liquid inlet hole 202-4 and the second liquid inlet hole 202-5 in the flange 202-1, and the cross sections of the first liquid inlet hole 202-4 and the second liquid inlet hole 202-5 are both conical, therefore, when the valve body 201 is not assembled, the sealing sheet 203-4 can seal the first liquid inlet hole 202-4, and when in use, when natural gas enters the first liquid inlet hole 202-4, the gas pressure will push the sealing sheet 203-4 to move and seal the limiting sheet 206-3. Under obstruction, natural gas will be discharged along the gap between the sealing plate 203-4 and the first liquid inlet hole 202-4, and after the electric adjustment rod 206-2 adjusts the position of the limit plate 206-3, the sealing plate 203-4 will quickly enter the second liquid inlet hole 202-5 along the first liquid inlet hole 202-4, and under the action of pressure, it will fit with the inner wall of the second liquid inlet hole 202-5 to achieve the sealing effect of the first liquid inlet hole 202-4 and the second liquid inlet hole 202-5.

[0062] The embodiments of the present invention disclose preferred embodiments, but are not limited thereto. A person skilled in the art can easily understand the spirit of the present invention based on the above embodiments and make different extensions and changes. However, as long as they do not deviate from the spirit of the present invention, they are all within the protection scope of the present invention.

Claims

1. A gas wellhead mechanism for natural gas extraction, characterized in that: include, The mounting mechanism (1) comprises a first connecting seat (101), two cross-pieces (102), a second connecting seat (103) located above the first connecting seat (101), and a positioner (104), wherein the first connecting seat (101) and the second connecting seat (103) are connected via the cross-pieces (102), and the positioner (104) is arranged outside the cross-pieces (102); and A control mechanism (2), comprising a valve body (201), a connecting assembly (202) arranged on both sides of the valve body (201), an elastic assembly (203) located inside the connecting assembly (202), an adjusting assembly (204), a sealing gasket (205), an alarm assembly (206), and an adjusting dial (207), wherein the adjusting assembly (204) is located inside the connecting assembly (202), the sealing gasket (205) is arranged on one side of the connecting assembly (202), the alarm assembly (206) is located outside the connecting assembly (202), and the adjusting assembly (204) is located on the front side of the valve body (201); The connection assembly (202) comprises a flange (202-1), a plurality of placement holes (202-2) and a plurality of mounting holes (202-3) are provided on one side of the flange (202-1), a first liquid inlet hole (202-4) is provided on one side of the flange (202-1), a second liquid inlet hole (202-5) is provided on one side of the inner wall of the first liquid inlet hole (202-4), the first liquid inlet hole (202-4) is connected to the second liquid inlet hole (202-5), the internal shapes of the first liquid inlet hole (202-4) and the second liquid inlet hole (202-5) are both conical, a storage groove (202-6) is provided on one side of the flange (202-1), the storage groove (202-6) is annular, and a plurality of limiting sliding grooves (202-7) are provided on the other side of the flange (202-1); The flange (202-1) has a side with a plurality of limit sliding grooves (202-7) connected to the valve body (201), the shape of the flange (202-1) matches the shape of the connecting plate on the other side of the valve body (201), the elastic component (203) is fixedly connected to one side of the flange (202-1), the plurality of adjustment components (204) are located in the plurality of placement holes (202-2), and the sealing gasket (205) is fixedly connected in the storage groove (202-6); The elastic component (203) comprises a support frame (203-1), one side of the support frame (203-1) is fixedly connected to one end corresponding to the telescopic rod (203-2), the telescopic rod (203-2) is outer-mounted with a spring (203-3), one end of the spring (203-3) is fixedly connected to the outside of the telescopic rod (203-2), the other ends of the telescopic rod (203-2) and the spring (203-3) are both fixedly connected to a sealing sheet (203-4), and the telescopic rod (203-2) is a multi-section telescopic rod; The support frame (203-1) is fixedly connected to one side of the flange plate (202-1), and the sealing sheet (203-4) is located in the first liquid inlet hole (202-4) and the second liquid inlet hole (202-5); The adjustment assembly (204) comprises an extrusion sheet (204-1), one side of the extrusion sheet (204-1) is fixedly connected to a rotator (204-2), a connecting sheet (204-3) is connected to the outer sleeve of the rotator (204-2), one end of the rotator (204-2) passes through the connecting sheet (204-3) and is clamped with a transmission (204-4), one end of the rotator (204-2) is fixedly connected to a pressure device (204-5), the pressure device (204-5) is meshed with two driven devices (204-6), and a guide groove is provided on one side of the connecting sheet (204-3); The other end of the pressure device (204-5) is connected to the sealing gasket (205), the follower (204-6) is slidably connected in the limiting sliding groove (202-7), the pressure device (204-5) is fixedly connected to the outside of the valve body (201), the transmission device (204-4) is fixedly connected to the outside of the flange (202-1), and the connecting piece (204-3) is fixedly connected to the placement hole (202-2); The rotator (204-2) comprises a rotating rod (204-201), a spiral blade (204-202) is fixedly connected to the outside of the rotating rod (204-201), and two limiting grooves (204-203) are formed on the outside of the rotating rod (204-201); One end of the rotating rod (204-201) is fixedly connected to a side corresponding to the extrusion sheet (204-1), one end of the rotating rod (204-201) passes through the connecting sheet (204-3) and the transmission device (204-4) and is fixedly connected to the pressure device (204-5), and the shapes of the rotating rod (204-201) and the spiral blade (204-202) are adapted to the shapes of the connecting sheet (204-3) and the guide groove provided in the connecting sheet (204-3); The transmission device (204-4) comprises a gear (204-401), a bearing (204-402) is arranged inside the gear (204-401), the gear (204-401) is fixedly connected to the inner ring of the bearing (204-402), a fixed leg (204-404) is fixedly connected outside the bearing (204-402), and two limit blocks (204-403) are fixedly connected inside the bearing (204-402); The bearing (204-402) is mutually clamped with the rotating rod (204-201) via a limit block (204-403) provided on the inner ring, the outer ring of the bearing (204-402) is fixedly connected with the flange (202-1) via a fixed leg (204-404), and the gear (204-401) is meshed with two driven devices (204-6); The pressure device (204-5) comprises a sealing cylinder (204-501), a piston plate (204-502) is slidably connected inside the sealing cylinder (204-501), a sleeve (204-503) is fixedly connected to one side of the piston plate (204-502), a mounting block (204-504) is fixedly connected to the outside of the sealing cylinder (204-501), the other side of the sealing cylinder (204-501 is connected to the conduit (204-505), a limited telescopic column (204-506) is tightly welded to one side of the mounting block (204-504), and the shape of the piston plate (204-502 is adapted to the shape of the sealing cylinder (204-501); One end of the rotating rod (204-201) is rotatably connected in the sleeve (204-503), the sealing cylinder (204-501) is connected to the sealing pad (205) via a conduit (204-505), and the other end of the limiting telescopic column (204-506) is fixedly connected to the outer wall of the valve body (201); The driven device (204-6) comprises a tooth plate (204-601), one side of the tooth plate (204-601) is fixedly connected to the reinforcing rib (204-602), the back side of the reinforcing rib (204-602) is fixedly connected to a limiting sliding block (204-603), and one side of the reinforcing rib (204-602) is fixedly connected to an anti-slip plate (204-604); The limiting sliding block (204-603) is slidably connected in the limiting sliding groove (202-7), and the tooth plate (204-601) is meshed with the gear (204-401); The alarm component (206) comprises an alarm (206-1), the bottom end of the alarm (206-1) is fixedly connected to an electric adjustment rod (206-2), and the bottom end of the electric adjustment rod (206-2) is fixedly connected to a limit plate (206-3); One side of the limiting plate (206-3) overlaps with a side corresponding to the sealing plate (203-4), and the shape of the upper portion of the limiting plate (206-3) matches the shape of the inner wall of the second liquid inlet hole (202-5).

2. The gas wellhead mechanism for natural gas production according to claim 1, characterized in that: The top of the first connection seat (101) is connected to the four-way (102) located below, and the top of the four-way (102) located below is connected to the bottom of the second connection seat (103), and the top of the second connection seat (103) is connected to the four-way (102) located above, and positioners (104) are fixedly connected to both sides of the two four-way (102); The four-way valve (102) is connected to the two valve bodies (201) via a positioner (104).

3. The gas wellhead mechanism for natural gas production according to claim 2, characterized in that: The two sides of the valve body (201) are respectively connected to the connection disk and the connection component (202); the connection component (202) is fixedly connected to the elastic component (203); a plurality of adjustment components (204) are fixedly connected inside the connection component (202); one side of the connection component (202) is fixedly connected to the sealing gasket (205); the alarm component (206) is located outside the connection component (202); the adjustment dial (207) is rotatably connected to the front side of the valve body (201); and the shape of the connection disk provided on one side of the valve body (201) is compatible with the shape of the connection component (202); The valve bodies (201) are connected via a connecting assembly (202).

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