A blowout prevention device for oil wellhead

Abstract

The present invention relates to the technical field of blowout prevention devices, and more specifically discloses a blowout prevention device for an oil wellhead, comprising an oil wellhead, a material receiving barrel being provided on one side of the oil wellhead, a cylinder being provided inside the material receiving barrel, a chassis being provided above the oil wellhead, a transmission mechanism being provided above the chassis, a guide column being provided above the chassis, a guide column being provided inside the chassis, a cleaning device being slidably connected above the guide column, a valve body being provided above the cleaning device, a cleaning device being provided on one side of the valve body, and a conveying device being provided above the cleaning device. The present invention is advantageous in utilizing the impact force generated during a blowout to be converted into the tightening force of a screw by providing a transmission mechanism, so that screws that are not tightly connected to the wellhead due to the impact force of the blowout are tightened, thereby further consolidating the sealing of the wellhead, and can be resealed without manual inspection and intervention, thus saving manpower and material resources.

Description

Technical Field

[0001] The present invention relates to the technical field of blowout prevention devices, and more particularly to a blowout prevention device used for a petroleum wellhead. Background Art

[0002] A blowout is a phenomenon in which formation fluids (oil, gas, and water) flow into the wellbore continuously and uncontrollably, gushing out of the ground or invading other low-pressure layers. This is an accident that may occur during the extraction of oil and natural gas, and most of the time it occurs at the extraction site. There are many reasons for a blowout, including inaccurate control of formation pressure, low mud density, reduced mud column height in the well, drilling and suction, and other improper measures. Blowouts are often accompanied by toxic gases, which cause great harm to the environment and humans. In order to prevent blowouts, a wellhead blowout preventer should be used, and therefore, various wellhead blowout preventers have emerged.

[0003] The patent with announcement number CN220267654U discloses a petroleum wellhead blowout preventer, which relates to the technical field of blowout preventers. In order to solve the problem that the device cannot stably seal the inside of the pipeline and automatically release pressure, it includes a pipeline, a cover and a sealing strip. A sealing device is symmetrically arranged inside the pipeline. The sealing device includes a motor and a first straight rod. The motor is fixedly connected to the inner surface of the pipeline through a bracket. The output shaft of the motor is fixedly connected to one end of the first straight rod. The motor can drive the first straight rod to rotate. The other end of the first straight rod is movably connected to one end of the second straight rod through a rotating shaft. The other end of the second straight rod is movably connected to the surface of the support rod. The inner surface of the pipeline is fixedly connected to the first hydraulic cylinder. One end of the support rod passes through the opening opened on the pipeline surface and is fixedly connected to the surface of the sealing block.

[0004] The above-mentioned related technical solutions have the following defects: if the blowout prevention device is subjected to too many blowouts, the sealing device will inevitably loosen due to multiple impacts of the blowout. After the loosening occurs, manual inspection must be relied upon to confirm whether the loosening occurs, and the loosened device needs to be manually resealed. In addition, the surface of the box body in this technology will stick to various liquids from the blowout over time, which not only affects the appearance, but the high-viscosity liquid sticking to the surface of the box body will also affect the normal operation of maintenance work. Summary of the Invention

[0005] In order to overcome the above-mentioned defects of the prior art, the present invention provides a blowout prevention device for a petroleum wellhead to solve the problems existing in the above-mentioned background technology.

[0006] The present invention provides the following technical solution: a blowout prevention device for an oil wellhead, comprising an oil wellhead, a material receiving barrel provided on one side of the oil wellhead, a cylinder provided inside the material receiving barrel, a chassis provided above the oil wellhead, a transmission mechanism provided above the chassis, a guide post provided above the chassis, a guide post provided inside the chassis, a cleaning device slidably connected above the guide post, a valve body provided above the cleaning device, a valve opening and closing device provided on one side of the valve body, a cleaning device provided on the other side of the valve body, a conveying device provided above the cleaning device, and a displacement sensor provided at the bottom of the chassis;

[0007] Furthermore, the valve opening and closing device includes a first rack, which is fixedly connected to the conveying device. A valve switch is provided below the first rack, and the first rack is meshed with the outer surface of the valve switch.

[0008] Furthermore, the conveying device includes a base plate, the bottom surface of which is fixedly connected to a first support plate and a second support plate, the first support plate is rotatably connected to a screw, the second support plate is fixedly connected to a guide rod, one end of the screw is rotatably connected to a motor, the screw is helically driven with a slider, both ends of the slider are slidably connected to the guide rod, and a support rod is provided between the base plate and the valve body.

[0009] Furthermore, the cleaning device includes a second rack, the upper part of the second rack is fixedly connected to one side of the slider, the lower part of the second rack is meshed with a first gear, the first gear key is connected to the transmission shaft, the transmission shaft key is connected to the first bevel gear, and the lower part of the first bevel gear is meshed with a water sprinkler.

[0010] Furthermore, the water sprinkler includes a sprinkler head, which is trumpet-shaped with a narrow top and a wide bottom. A through hole is provided in the middle of the sprinkler head. A circular conical tooth plate is provided on the upper narrow side of the sprinkler head. A water sprinkling hole is provided at the lower part of the sprinkler head. Several support plates are provided on the inner wall of the sprinkler head. An arc plate is provided below the support plate, and the arc plate is rotatably connected to the guide column.

[0011] Furthermore, the transmission mechanism includes a third rack, the third rack is slidably connected to the guide column, the outer side of the third rack is meshed with a second gear, the center key of the second gear is connected to one end of the transmission rod, a support column is provided between the transmission rod and the chassis, the other end of the transmission rod is keyed to a second bevel gear, the upper part of the second bevel gear is meshed with a convex nail with conical teeth, the bottom of the convex nail with conical teeth is connected to a plurality of groove screws through a toothed belt, and the toothed belt is connected to the groove screw pulley.

[0012] Furthermore, the material receiving barrel includes a barrel body, a fixing box is provided on the inner wall of the barrel body, a groove is provided on the side of the fixing box away from the inner wall, a cylinder is provided at the bottom of the groove, and the rod of the cylinder is connected to a movable plate.

[0013] Furthermore, the guide column includes a column body, the outer wall of the column body is provided with a vertical guide rail groove, the upper surface of the column body is provided with an annular guide rail groove, the third rack is installed in the vertical guide rail groove, the arc plate is installed in the annular guide rail groove, the annular guide rail groove does not overlap with the vertical guide rail groove, and a chassis is provided under the column body.

[0014] Furthermore, the chassis includes a disc body, a surface of the disc body is provided with a plurality of screw holes, the groove screws are threadedly connected to the screw holes, the outer side of the disc body is provided with a panel, one side of the disc body panel is provided with a drain port, a telescopic square box is provided under the disc body, the telescopic square box is a telescopic square tube, the third rack is installed inside the square tube, the inner side of the screw hole is provided with a hole for the third rack to extend out, and a force-bearing plate is fixedly connected to the bottom of the telescopic square box.

[0015] The technical effects and advantages of the present invention are as follows:

[0016] 1. The present invention, by providing a transmission mechanism, facilitates the conversion of the impact force generated by a blowout into a tightening force for the screws. This tightens any screws that have become loosely connected to the wellhead due to the blowout's impact, further strengthening the wellhead's sealing properties. Resealing is possible without manual inspection or intervention, saving both manpower and material resources.

[0017] 2. The present invention incorporates a cleaning device. When liquid gushing out of the wellhead adheres to the chassis surface, the high-pressure water gun can be used to flush the chassis surface. This prevents liquid accumulation and the absorption of various dust particles that would affect the appearance of the device, and also avoids difficulties encountered by workers during device maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0019] Figure 2 It is a schematic diagram of the overall structure of the present invention from another angle.

[0020] Figure 3 It is a cross-sectional view of the overall structure of the present invention.

[0021] Figure 4 This is a cross-sectional view of the overall structure of the third rack of the present invention when it is rising.

[0022] Figure 5 It is a schematic diagram of the water sprinkling structure of the present invention.

[0023] Figure 6 It is a top view of the transmission mechanism of the present invention.

[0024] Figure 7It is a cross-sectional view of the material receiving barrel of the present invention.

[0025] Figure 8 It is a schematic structural diagram of the guide column and chassis of the present invention.

[0026] Figure 9 It is a cross-sectional schematic diagram of the guide column and chassis of the present invention.

[0027] The accompanying drawings are marked as follows: 1. conveying device; 101. bottom plate; 102. first support plate; 103. second support plate; 104. screw; 105. guide rod; 106. slider; 107. support rod; 108. motor; 2. valve opening and closing device; 201. first rack; 202. valve switch; 3. cleaning device; 301. second rack; 302. first gear; 303. transmission shaft; 304. first bevel gear; 305. water sprinkler; 3051. circular bevel gear plate; 3052. sprinkler head; 3053. water sprinkling hole; 3054. support plate; 3055. arc plate; 4. transmission mechanism; 4 01. Third rack; 402. Second gear; 403. Transmission rod; 404. Support column; 405. Second bevel gear; 406. Pinion with bevel teeth; 407. Toothed belt; 408. Grooved screw; 5. Oil wellhead; 6. Material collecting barrel; 601. Barrel body; 602. Fixed box; 603. Cylinder; 604. Movable plate; 7. Guide column; 701. Column; 702. Vertical guide rail groove; 703. Annular guide rail groove; 8. Chassis; 801. Disc body; 802. Screw hole; 803. Drain port; 804. Telescopic box; 805. Force plate; 9. Valve body; 10. Displacement sensor. DETAILED DESCRIPTION

[0028] The technical solutions of the present invention will be described clearly and completely below in conjunction with the accompanying drawings of the present invention. In addition, the forms of the various structures described in the following embodiments are merely examples. The blowout preventer for an oil wellhead involved in the present invention is not limited to the various structures described in the following embodiments. All other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0029] Reference Figure 1The present invention provides a blowout prevention device for an oil wellhead, comprising an oil wellhead 5, a material receiving barrel 6 being provided on one side of the oil wellhead 5, a cylinder 603 being provided inside the material receiving barrel 6, a chassis 8 being provided above the oil wellhead 5, a transmission mechanism 4 being provided above the chassis 8, a guide column 7 being provided above the chassis 8, the chassis 8 being located on the periphery of the guide column 7, a cleaning device 3 being slidably connected above the guide column 7, a valve body 9 being provided above the cleaning device 3, a valve opening and closing device 2 being provided on one side of the valve body 9, a cleaning device 3 being provided on the other side of the valve body 9, a conveying device 1 being provided above the cleaning device 3, the valve opening and closing device 2 comprising a first rack 201, the first rack 201 being fixedly connected to the conveying device 1, a valve switch 202 being provided below the first rack 201, the first rack 201 being meshedly connected to the outer surface of the valve switch 202;

[0030] In this embodiment, it should be specifically explained that the cylinder 603 is connected to an external air intake pump, thereby continuously delivering gas to the interior of the cylinder 603 .

[0031] The main difference between this embodiment and the prior art is that the embodiment uses the mutual engagement between the gear rack to re-tighten the screws that are loosened by the blowout impact, so that the blowout prevention device does not need to be manually re-tightened after it is loosened, and the surface of the device is cleaned by the rotation of the nozzle and then the sewage is collected. Specifically, the embodiment comprises a conveying device 1, a cleaning device 3, and a transmission mechanism 4;

[0032] The above structure is the main structure of this embodiment, which solves the problem that the blowout preventer is not aesthetically pleasing and affects normal operation when working for a long time. The motor 108 is an existing structure, and the specific structure and connection method of the motor 108 are not described in detail in this embodiment.

[0033] Reference Figure 2 The conveying device 1 includes a base plate 101, and the bottom surface of the base plate 101 is fixedly connected to a first support plate 102 and a second support plate 103. The first support plate 102 is rotatably connected to a screw 104, and the second support plate 103 is fixedly connected to a guide rod 105. One end of the screw 104 is rotatably connected to a motor 108. The screw 104 is spirally driven with a slider 106. Both ends of the slider 106 are slidably connected to the guide rod 105. A support rod 107 is provided between the base plate 101 and the valve body 9.

[0034] In this embodiment, it should be specifically explained that: when the motor 108 is started and rotates forward, driving the screw 104 to rotate in the corresponding direction, the slider 106, under the action of the spiral transmission and the limitation of the guide rod 105, moves in a straight line toward the direction close to the motor 108; when the motor 108 rotates reversely, driving the screw 104 to rotate in the corresponding direction, the slider 106, under the action of the spiral transmission and the limitation of the guide rod 105, moves in the direction away from the motor 108.

[0035] Reference Figure 3 and Figure 4 The cleaning device 3 includes a second rack 301, the upper part of the second rack 301 is fixedly connected to one side of the slider 106, the lower part of the second rack 301 is meshed with a first gear 302, the first gear 302 is key-connected to the transmission shaft 303, the transmission shaft 303 is key-connected to the first bevel gear 304, and the lower part of the first bevel gear 304 is meshed with a water sprinkler 305.

[0036] In this embodiment, it should be specifically explained that: when the slider 106 moves toward the direction approaching the motor 108, the second rack 301 fixedly connected thereto also moves toward the direction approaching the motor 108, the second rack 301 engages with the first gear 302 for transmission, the first gear 302 rotates, and the transmission shaft 303 keyed to the first gear 302 rotates, thereby driving the first bevel gear 304 to rotate, and the first bevel gear 304 drives the water sprinkler 305 engaged therewith to rotate, and when the slider 106 moves away from the motor 108, the water sprinkler 305 also rotates in the opposite direction.

[0037] Reference Figure 5 The water sprinkler 305 includes a sprinkler head 3052, which is shaped like a trumpet with a narrow top and a wide bottom. A through hole is opened in the middle of the sprinkler head 3052, and a circular conical tooth plate 3051 is provided on the upper narrow side of the sprinkler head 3052. A water sprinkling hole 3053 is opened at the lower part of the sprinkler head 3052. A plurality of support plates 3054 are provided on the inner wall of the sprinkler head 3052, and an arc plate 3055 is provided below the support plate 3054. The arc plate 3055 is rotatably connected to the guide column 7.

[0038] In this embodiment, it should be specifically explained that: when the first bevel gear 304 rotates, the circular bevel gear plate 3051 meshing with the first bevel gear 304 also moves accordingly, and the cleaning device 3 as a whole also moves accordingly. Moreover, since the arc plate 3055 is rotatably connected to the guide column 7, the cleaning device 3 as a whole rotates around the guide column 7, and the cleaning water and the cleaning agent flow out of the holes of the water sprinkling hole 3053 in an interlaced manner. The holes from which the clean water flows out make the clean water impact at a higher speed, which facilitates cleaning.

[0039] Reference Figure 6 The transmission mechanism 4 includes a third rack 401, which is slidably connected to the guide column 7. The outer side of the third rack 401 is meshed with the second gear 402. The center key of the second gear 402 is connected to one end of the transmission rod 403. A support column 404 is provided between the transmission rod 403 and the chassis 8. The other end of the transmission rod 403 is keyed to a second bevel gear 405. The upper part of the second bevel gear 405 is meshed with a convex nail 406 with conical teeth. The bottom of the convex nail 406 with conical teeth is connected to a plurality of groove screws 408 through a toothed belt 407. The toothed belt 407 is connected to the pulley of the groove screw 408.

[0040] In this embodiment, it should be specifically explained that: the third rack 401 moves upward, the third rack 401 generates a rotational force on the second gear 402 meshed with it, the second gear 402 rotates, and under the action of the key connection, the transmission rod 403 also rotates, and the transmission rod 403 drives the second bevel gear 405 to rotate, and the bevel toothed convex nail 406 meshed with the second bevel gear 405 also rotates, and the bevel toothed convex nail 406 is synchronously connected to the groove screw 408, and the bevel toothed convex nail 406 rotates, and the groove screw 408 also rotates accordingly.

[0041] Reference Figure 7 The material receiving barrel 6 includes a barrel body 601, a fixing box 602 is provided on the inner wall of the barrel body 601, a groove is provided on the side of the fixing box 602 away from the inner wall, a cylinder 603 is provided at the bottom of the groove, and a movable plate 604 is connected to the rod of the cylinder 603.

[0042] In this embodiment, it should be specifically explained that: the sewage no longer enters the barrel 601. After a period of standing, the suspended solids in the sewage will settle to the bottom to form a sludge layer, while the light oil and grease and floating pollutants will float to the surface of the water. At this time, the cylinder 603 is started, and the cylinder 603 pushes the movable plate 604 outward to separate the sludge layer from the light oil layer. The water in the upper layer is then discharged, and the sludge layer is processed. In this way, through physical separation, the suspended solids and grease content in the sewage can be greatly reduced.

[0043] Reference Figure 8 and Figure 9 The guide column 7 includes a column 701, a vertical guide groove 702 is provided on the outer wall of the column 701, an annular guide groove 703 is provided on the upper surface of the column 701, the third rack 401 is installed in the vertical guide groove 702, the arc plate 3055 is installed in the annular guide groove 703, the annular guide groove 703 does not intersect with the vertical guide groove 702, and a chassis 8 is provided below the column 701. The chassis 8 includes a plate 801, and the surface of the plate 801 is provided with several Screw hole 802, the groove screw 408 is threadedly connected to the screw hole 802, a panel is provided on the outside of the disk body 801, a drain port 803 is provided on one side of the panel of the disk body 801, a telescopic square box 804 is provided below the disk body 801, the telescopic square box 804 is a telescopic square tube, the third rack 401 is installed inside the square tube, a hole is provided on the inside of the screw hole 802 for the third rack 401 to extend out, and a force plate 805 is fixedly connected to the bottom of the telescopic square box 804.

[0044] In this embodiment, it needs to be specifically explained that: when a blowout occurs, the force-bearing plate 805 rises under the impact of the blowout liquid, and the telescopic square box 804 contracts accordingly. The second gear 402 rises under the lifting of the telescopic square box 804, and then the arc plate 3055 slides in the annular guide groove 703. The third rack 401 is fixedly connected to the moving block inside the vertical guide groove 702, and the moving block slides inside the vertical guide groove 702. The cleaned sewage is also discharged into the receiving barrel 6 through the drain port 803.

[0045] Working principle of the present invention:

[0046] The main problem solved by this embodiment is: screws that are loosened by the blowout impact are re-tightened by utilizing the mutual engagement between the gears and racks, thereby achieving the goal of eliminating the need for manual re-tightening of the blowout prevention device after it is loosened, and utilizing the rotation of the nozzle to clean the surface of the device and then collect sewage, thereby solving the problem of the blowout prevention device being unsightly and affecting its normal operation when working for a long time.

[0047] The specific steps are as follows:

[0048] First, a blowout occurs at the oil wellhead 5, and liquid rushes upward from the bottom of the oil wellhead 5 to the position of the force-bearing plate 805, generating an upward impact force on the force-bearing plate 805. The force-bearing plate 805 moves upward, and the bottom of the telescopic box 804 fixedly connected to the force-bearing plate 805 moves upward. The telescopic box 804 contracts upward, and the bottom of the telescopic box 804 generates an upward lifting force on the third rack 401 fixedly connected to the telescopic box 804. The third rack 401 moves upward, and the third rack 401 generates a rotation force on the second gear 402 meshing with it. The second gear 402 rotates due to the rotational force. Under the action of the key connection, the transmission rod 403 also rotates. The transmission rod 403 drives the second bevel gear 405 to rotate, and the bevel-toothed protruding nail 406 meshing with the second bevel gear 405 also rotates. The bevel-toothed protruding nail 406 is synchronously connected to the groove screw 408. As the bevel-toothed protruding nail 406 rotates, the groove screw 408 also rotates. In this way, the loose connection between the groove screw 408 and the oil well head 5 caused by the blowout is solved by continuing to tighten the groove screw 408.

[0049] When a blowout occurs at the oil wellhead 5, the force plate 805 moves upward, and the displacement sensor 10 opposite to the force plate 805 senses a change in distance and sends a start signal to the motor 108. The motor 108 starts, and the motor 108 drives the slider 106 to move toward the motor 108, and drives the first rack 201 to move toward the motor 108. The valve switch 202 meshed with the first rack 201 is closed, and the oil wellhead 5 is closed to prevent the blowout liquid from being sprayed out. The slider 106 moves toward the motor 108, and the second rack 301 fixedly connected to it also moves toward the motor 108. The second rack 301 also moves toward the motor 108. The gear 301 meshes with the first gear 302 for transmission, and the first gear 302 rotates, causing the transmission shaft 303 keyed to the first gear 302 to rotate, thereby driving the first bevel gear 304 to rotate. The first bevel gear 304 drives the water sprinkler 305 meshed with it to rotate. When the displacement sensor 10 senses a change in distance, a portion of the water sprinkling holes 3053 inside the water sprinkler 305 emits a high-pressure water flow, and a portion of the water flow flows out of the cleaning agent. The rotating water sprinkler 305 rinses every corner of the disc 801, and the sewage after rinsing flows into the interior of the material receiving barrel 6 through the drain port 803 to be taken away by relevant personnel.

[0050] When the blowout no longer occurs at the oil wellhead 5, the impact force on the force-bearing plate 805 disappears, and the force-bearing plate 805 returns to its original position under the action of gravity, pulling the telescopic box 804 to restore its original shape. The displacement sensor 10 senses that the force-bearing plate 805 has returned to its original position and sends a reversal signal to the motor 108. The motor 108 reverses, and the slider 106 moves away from the motor 108, driving the first rack 201 to move away from the motor 108. The valve switch 202 meshing with the first rack 201 opens, and the slider 106 moves away from the motor 108. The fixedly connected second rack 301 also moves away from the motor 108, and the second rack 301 meshes with the first gear 302 for transmission, the first gear 302 rotates, and the transmission shaft 303 key-connected to the first gear 302 rotates, thereby driving the first bevel gear 304 to rotate, and the first bevel gear 304 drives the water sprinkler 305 meshed with it to rotate in the opposite direction, so that it can clean the disk body 801 more thoroughly. Then, under the action of the time relay, after the set time, the water sprinkler 305 stops emitting high-pressure water and cleaning agent, and stops cleaning the disk body 801.

[0051] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A blowout prevention device for an oil wellhead, comprising an oil wellhead (5), characterized in that: A material receiving barrel (6) is provided on one side of the oil well mouth (5), a cylinder (603) is provided inside the material receiving barrel (6), a chassis (8) is provided above the oil well mouth (5), a transmission mechanism (4) is provided above the chassis (8), a guide column (7) is provided above the chassis (8), a guide column (7) is provided inside the chassis (8), a cleaning device (3) is slidably connected above the guide column (7), a valve body (9) is provided above the cleaning device (3), a valve opening and closing device (2) is provided on one side of the valve body (9), a cleaning device (3) is provided on the other side of the valve body (9), a conveying device (1) is provided above the cleaning device (3), and a displacement sensor (10) is provided at the bottom of the chassis (8); The transmission mechanism (4) comprises a third rack (401), the third rack (401) is slidably connected to the guide column (7), the outer side of the third rack (401) is meshedly connected to a second gear (402), the center key of the second gear (402) is connected to one end of a transmission rod (403), a support column (404) is provided between the transmission rod (403) and the chassis (8), the other end of the transmission rod (403) is keyed to a second bevel gear (405), the upper part of the second bevel gear (405) is meshedly connected to a protruding nail with bevel teeth (406), the bottom of the protruding nail with bevel teeth (406) is connected to a plurality of groove screws (408) via a toothed belt (407), and the toothed belt (407) is connected to a pulley of the groove screws (408).

2. The blowout prevention device for a petroleum wellhead according to claim 1, characterized in that: The valve opening and closing device (2) comprises a first rack (201), the first rack (201) being fixedly connected to the conveying device (1), a valve switch (202) being provided below the first rack (201), and the first rack (201) being meshedly connected to the outer surface of the valve switch (202).

3. The blowout prevention device for a petroleum wellhead according to claim 1, characterized in that: The conveying device (1) comprises a base plate (101), the bottom surface of the base plate (101) is fixedly connected to a first support plate (102) and a second support plate (103), the first support plate (102) is rotatably connected to a screw rod (104), the second support plate (103) is fixedly connected to a guide rod (105), one end of the screw rod (104) is rotatably connected to a motor (108), the screw rod (104) is helically driven by a slider (106), both ends of the slider (106) are slidably connected to the guide rod (105), and a support rod (107) is provided between the base plate (101) and the valve body (9).

4. The blowout prevention device for a petroleum wellhead according to claim 3, characterized in that: The cleaning device (3) comprises a second rack (301), the upper portion of the second rack (301) is fixedly connected to one side of the slider (106), the lower portion of the second rack (301) is meshed with a first gear (302), the first gear (302) is key-connected to a transmission shaft (303), the transmission shaft (303) is key-connected to a first bevel gear (304), and the lower portion of the first bevel gear (304) is meshed with a water sprinkler (305).

5. The blowout prevention device for a petroleum wellhead according to claim 4, characterized in that: The water sprinkler (305) comprises a sprinkler head (3052), the sprinkler head (3052) is in the shape of a trumpet that is narrow at the top and wide at the bottom, a through hole is provided in the middle of the sprinkler head (3052), a circular conical tooth plate (3051) is provided on the upper narrow side of the sprinkler head (3052), a water sprinkling hole (3053) is provided at the bottom of the sprinkler head (3052), a plurality of support plates (3054) are provided on the inner wall of the sprinkler head (3052), an arc plate (3055) is provided below the support plate (3054), and the arc plate (3055) is rotatably connected to the guide column (7).

6. The blowout prevention device for a petroleum wellhead according to claim 1, characterized in that: The material receiving barrel (6) comprises a barrel body (601), a fixing box (602) is provided on the inner wall of the barrel body (601), a groove is provided on the side of the fixing box (602) away from the inner wall, a cylinder (603) is provided at the bottom of the groove, and a rod of the cylinder (603) is connected to a movable plate (604).

7. The blowout prevention device for a petroleum wellhead according to claim 5, characterized in that: The guide column (7) comprises a column (701), the outer wall of the column (701) is provided with a vertical guide rail groove (702), the upper surface of the column (701) is provided with an annular guide rail groove (703), the third rack (401) is installed in the vertical guide rail groove (702), the arc plate (3055) is installed in the annular guide rail groove (703), the annular guide rail groove (703) and the vertical guide rail groove (702) do not intersect, and a chassis (8) is provided below the column (701).

8. The blowout prevention device for a petroleum wellhead according to claim 1, characterized in that: The chassis (8) includes a disc body (801), a surface of the disc body (801) is provided with a plurality of screw holes (802), the groove screws (408) are threadedly connected to the screw holes (802), the outer side of the disc body (801) is provided with a panel, one side of the panel of the disc body (801) is provided with a drain port (803), a telescopic square box (804) is provided below the disc body (801), the telescopic square box (804) is a telescopic square tube, the third rack (401) is installed inside the square tube, the inner side of the screw hole (802) is provided with a hole for the third rack (401) to extend out, and a force-bearing plate (805) is fixedly connected below the telescopic square box (804).

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