An oil production wellhead valve

Abstract

The application belongs to the technical field of oil extraction supporting equipment, in particular to an oil extraction wellhead valve, which comprises a valve body, the upper end of the valve body is wrapped with sponge sheets around, an outer shell is arranged on one side of the valve body, cylinders are rotatably arranged inside the outer shell, the rolled sponge sheets are installed outside the cylinder on one side, the end of the rolled sponge sheets is pulled out and fixed outside the cylinder on the other side, a detection assembly is arranged at the lower end of the sponge sheets, the detection assembly comprises a first ring arranged at the lower end of the sponge sheets, a second ring is arranged at the lower end of the first ring, the first ring is slidably arranged outside the valve body, and a controller is fixedly connected to the upper end of the second ring. The sponge sheets are arranged to prevent sand and wind from entering the connection between the valve body and the pipeline. When leakage occurs at the connection between the valve body and the pipeline, the sponge sheets can be adsorbed and alarm at the same time, and new sponge sheets can be replaced, thereby reducing the safety risks and environmental pollution hazards.

Description

Technical Field

[0001] This invention belongs to the technical field of oil production equipment, specifically an oil wellhead valve. Background Technology

[0002] An oil well is a borehole drilled according to the well layout system planned for oilfield development, used to extract oil. It serves as a channel for oil to rise from the bottom of the well to the wellhead. Oil wells are created through drilling methods. Generally, after reaching the oil-bearing layer, a casing is run into the well, and cement is injected into the annular space between the casing and the wellbore to protect the wellbore and seal the oil, gas, and water layers. Then, according to the requirements of oilfield development, a perforating gun is used to open the oil layer, forming a channel. Tubing is then run in, and an appropriate flow-inducing method is used to raise the oil from the bottom of the well to the wellhead.

[0003] Oil extraction typically takes place in areas with strong winds and sandstorms. Over time, sand and dust can enter the connection points between the wellhead valves and pipelines. Hard particles in the sand and dust are carried by the airflow into the valve and pipeline connection points, causing mechanical wear on metal components such as the valve body, valve stem, and sealing surfaces under the action of fluid flow, thus shortening the service life of the equipment. Sand and dust deposits on the sealing surfaces or packing areas may lead to poor sealing, causing oil leaks, increasing safety risks and potential environmental pollution hazards.

[0004] Therefore, the present invention provides an oil wellhead valve. Summary of the Invention

[0005] In order to overcome the shortcomings of the prior art, at least one technical problem raised in the background art is solved.

[0006] The technical solution adopted by the present invention to solve its technical problem is as follows: An oil wellhead valve of the present invention includes a valve body, a protective component is provided on the outer side of the upper end of the valve body, the protective component includes a sponge sheet wrapped around the upper end of the valve body, an outer shell is provided on one side of the valve body, and cylinders are rotatably provided on both sides inside the outer shell. The rolled sponge sheet is installed on the outer side of the cylinder on one side, and the end of the rolled sponge sheet is pulled out and fixed to the outer side of the cylinder on the other side. A detection component is provided at the lower end of the sponge sheet. The detection component includes a first ring provided at the lower end of the sponge sheet, a second ring provided at the lower end of the first ring, an elastic component provided between the first ring and the second ring, the first ring being slidably disposed on the outer side of the valve body, and a controller being fixedly connected to the upper end of the second ring.

[0007] Preferably, the elastic component includes a first cylindrical rod fixed to the four corners of the lower end of the first ring, and a second cylindrical rod fixed to the upper end of the second ring at the position corresponding to the first cylindrical rod. The first cylindrical rod is slidably disposed inside the second cylindrical rod, and the first cylindrical rod is fixed to the second cylindrical rod by a first spring.

[0008] Preferably, the upper and lower ends of the outer casing are respectively provided with U-shaped rods, the U-shaped rods are respectively fixed to the outer casing through the first rectangular block, the two U-shaped rods are jointly fixed with the first rectangular strip, and the U-shaped rod at the lower end is fixed to one side of the valve body through the first L-shaped rod.

[0009] Preferably, the two cylinders slide through the middle of the outer shell, and the lower ends of the two cylinders are rotatably connected to a first waist-shaped strip. The upper end of the first L-shaped rod is fixed with a first cylindrical strip at the position corresponding to the first waist-shaped strip. The first waist-shaped strip is slidably disposed on the outside of the first cylindrical strip. The upper middle part of the cylinder is provided with an irregularly shaped rod, and the upper end of the irregularly shaped rod is rotatably disposed in the middle of the U-shaped rod.

[0010] Preferably, the outer casing has two first cylindrical wheels rotatably disposed on the side near the valve body, and a third rectangular bar is rotatably disposed at both ends of the first cylindrical wheels, and the third rectangular bar is fixed to one side of the U-shaped rod.

[0011] Preferably, the upper end of the irregular rod is fixedly connected to a gear by a cylindrical block, a first rack is provided on one side of the two gears, a second rectangular bar is provided on the upper end of the first rack, the first rack is slidably disposed at the lower end of the second rectangular bar, and the two ends of the second rectangular bar are fixedly connected to the first L-shaped rod by a second L-shaped rod.

[0012] Preferably, a loop frame is provided on the side of the first rack away from the gear, and a second cylindrical strip slides through the middle of both sides of the loop frame. One side of the second cylindrical strip is fixedly connected to the first rack, and a second spring is fixedly connected between the first rack and the loop frame. The second spring is located outside the second cylindrical strip, and a second rectangular block is fixedly connected to the upper end of the loop frame. The second rectangular block is slidably disposed at the lower end of the second rectangular strip.

[0013] Preferably, a second cylindrical wheel is slidably disposed inside the outer shell near the side of the rolled-up sponge sheet, and a fourth rectangular strip is fixedly connected to one side of the second cylindrical wheel, the fourth rectangular strip slidingly passing through one side of the outer shell.

[0014] Preferably, the first rack has a rectangular hole in the middle, the fourth rectangular rack is fixedly connected to the side away from the second cylindrical wheel with a sixth rectangular rack, the upper end of the sixth rectangular rack is fixedly connected to the second rack through the fifth rectangular rack, the second rack is located in the middle of the loop frame, the upper end of the sixth rectangular rack has a second rectangular groove, the upper end of the second rectangular groove is provided with a second waist-shaped strip, the lower end of the second waist-shaped strip is slidably disposed in the second rectangular groove through a rectangular slider, the upper end of the second waist-shaped strip away from the sixth rectangular rack is rotatably disposed with a third waist-shaped strip, the lower middle part of the third waist-shaped strip is rotatably disposed at the upper end of the second L-shaped rod through the third cylindrical strip, the upper end of the third waist-shaped strip away from the second waist-shaped strip is rotatably disposed with a fourth cylindrical strip, the lower end of the first rack is provided with a first rectangular groove corresponding to the position of the fourth cylindrical strip, the fourth cylindrical strip is slidably disposed in the first rectangular groove through a rectangular slider, the lower end of the sixth rectangular rack is fixedly connected with a seventh rectangular rack, the lower end of the seventh rectangular rack is slidably disposed with an eighth rectangular rack, and the eighth rectangular rack is fixedly connected to the upper end of the second L-shaped rod.

[0015] Preferably, a cover is rotatably provided on both sides of the outer shell, and a silicone sheet is fixedly attached to the side of the outer shell near the first cylindrical wheel.

[0016] The beneficial effects of this invention are as follows: 1. The oil wellhead valve of this invention uses a sponge sheet to prevent wind and sand from entering the connection between the valve body and the pipeline. When a leak occurs at the connection between the valve body and the pipeline, the sponge sheet can absorb the leak. When the sponge sheet reaches a certain weight, it drives the first ring to move downwards and touch the controller at the upper end of the second ring, triggering an alarm and immediately alerting the staff to come and check. By driving the special-shaped rod, the cylinder can be rotated, thereby rotating the rolled sponge sheet to replace the sponge sheet on the outside of the connection between the valve body and the pipeline, reducing safety risks and potential environmental pollution hazards.

[0017] 2. The oil wellhead valve of the present invention drives a sixth rectangular bar to slide closer to the outer shell. The sixth rectangular bar drives the third cylindrical bar at the lower end of the third cylindrical bar to rotate at the upper end of the second L-shaped rod through the second waist-shaped bar. At the same time as the third waist-shaped bar rotates, the fourth cylindrical bar drives the first rack to move away from the gear, so that the first rack is temporarily separated from the gear. Then the sixth rectangular bar continues to move closer to the outer shell. The sixth rectangular bar drives the second rack to slide to the middle of the rectangular hole through the fifth rectangular bar, so that the second rack meshes with the gear. When the second rack moves, it drives the gear to rotate. The gear drives the lower cylinder to rotate. The cylinder drives the rolled sponge sheet to rotate, so that the sponge sheet is pulled out a certain distance, leaving room for the sponge sheet to slide downwards.

[0018] 3. The oil wellhead valve of the present invention allows for easy replacement of the sponge sheet 2 inside the outer shell 21 by opening the cover 211. The sponge sheet 2 passes between two first cylindrical wheels 25, which clamp the sponge sheet 2 so that it can fit tightly against the outside of the connection between the valve body 1 and the pipeline. Rotating the sponge sheet 2 drives the first cylindrical wheels 25 to rotate. Silicone sheets 212 are respectively provided on the side of the outer shell 21 near the first cylindrical wheels 25 to prevent contamination of the inside of the outer shell 21. Attached Figure Description

[0019] The invention will now be further described with reference to the accompanying drawings.

[0020] Figure 1 This is a perspective view of Embodiment 1 of the present invention; Figure 2 This is a diagram showing the location of the sponge sheet; Figure 3 This is a schematic diagram of the controller location; Figure 4 This is a schematic diagram of the outer casing location; Figure 5 This is a schematic diagram showing the position of the first cylindrical wheel; Figure 6 This is a schematic diagram of the outer shell cross-section; Figure 7 This is a schematic diagram showing the position of the first rack; Figure 8 This is a schematic diagram showing the position of the third waist-shaped strip; In the diagram: 1. Valve body; 2. Sponge sheet; 21. Outer shell; 211. Cover; 212. Silicone sheet; 22. First ring; 221. First cylindrical rod; 222. First spring; 223. Second cylindrical rod; 224. Second ring; 225. Controller; 23. Cylinder; 232. U-shaped rod; 2321. First rectangular bar; 233. First rectangular block; 234. First waist-shaped bar; 235. First cylindrical bar; 236. First L-shaped rod; 24. Irregular rod; 241. Cylindrical block; 242. Gear; 243. First rack; 2431. Rectangular hole; 2432. First rectangular... 244. Rectangular groove; 2441. Second cylindrical bar; 2442. Second spring; 245. Second rectangular block; 246. Second rectangular bar; 247. Second L-shaped rod; 25. First cylindrical wheel; 251. Third rectangular bar; 26. Second cylindrical wheel; 261. Fourth rectangular bar; 27. Second rack; 271. Fifth rectangular bar; 272. Sixth rectangular bar; 2721. Seventh rectangular bar; 2722. Eighth rectangular bar; 2721. Second rectangular groove; 273. Second waist-shaped bar; 274. Third waist-shaped bar; 2741. Third cylindrical bar; 275. Fourth cylindrical bar. Detailed Implementation

[0021] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0022] Example 1: As Figure 1 - Figure 8 As shown in the embodiment of the present invention, an oil wellhead valve includes a valve body 1. A protective component is provided on the outer side of the upper end of the valve body 1. The protective component includes a sponge sheet 2 wrapped around the upper end of the valve body 1. A shell 21 is provided on one side of the valve body 1. Cylinders 23 are rotatably arranged on both sides inside the shell 21. The rolled sponge sheet 2 is installed on the outer side of the cylinder 23 on one side. The end of the rolled sponge sheet 2 is pulled out and fixed to the outer side of the cylinder 23 on the other side. A detection component is provided at the lower end of the sponge sheet 2. The detection component includes a first ring 22 at the lower end of the sponge sheet 2 and a second ring 224 at the lower end of the first ring 22. An elastic component is provided between the first ring 22 and the second ring 224. The first ring 22 is slidably disposed on the outer side of the valve body 1. A controller 225 is fixedly connected to the upper end of the second ring 224.

[0023] Specifically, when oil extraction is carried out in areas with strong winds and sandstorms, sand and dust may enter the connection between the wellhead valve and the pipeline over time. Hard particles in the sand and dust are carried by the airflow into the valve-pipeline connection, causing mechanical wear under the influence of fluid flow, shortening the equipment's lifespan. Sand and dust deposits on the sealing surface or packing area may lead to poor sealing, causing oil leaks, increasing safety risks and environmental pollution hazards. When using this wellhead valve, after connecting the valve body 1 to the pipeline, a sponge sheet 2 is wrapped around the outside of the connection between the valve body 1 and the pipeline. The sponge sheet 2 prevents sand and dust from entering between the valve body 1 and the pipeline. However, prolonged contact between the valve body 1 and the pipeline may lead to poor sealing, causing leaks, increasing safety hazards and environmental pollution. The sponge sheet 2 can absorb leaked oil. When the sponge sheet 2 absorbs a large amount of oil and reaches a certain weight, it drives the first ring 22 to move downwards and touch the controller 225 at the upper end of the second ring 224. At this time, an alarm is triggered, immediately alerting the staff to come and check. At the same time as the alarm is triggered, the cylinders 23 on both sides inside the sponge sheet 2 rotate simultaneously, causing the dirty sponge sheet 2 to wrap around the outside of the cylinder 23. On the other side, a new roll of sponge sheet 2 is re-wrapped at the connection between the valve body 1 and the pipeline to prevent oil dripping. By setting the sponge sheet 2, wind and sand are prevented from entering the connection between the valve body 1 and the pipeline. When a leak occurs at the connection between the valve body 1 and the pipeline, the sponge sheet 2 can absorb the leak and trigger an alarm. At the same time, a new sponge sheet 2 is replaced, reducing safety risks and potential environmental pollution hazards.

[0024] like Figure 3As shown, the elastic component includes a first cylindrical rod 221 fixedly connected to the four corners of the lower end of the first ring 22, and a second cylindrical rod 223 fixedly connected to the upper end of the second ring 224 at the position corresponding to the first cylindrical rod 221. The first cylindrical rod 221 can be slidably disposed inside the second cylindrical rod 223, and the first cylindrical rod 221 is fixedly connected to the second cylindrical rod 223 by a first spring 222.

[0025] Specifically, when the sponge sheet 2 absorbs a certain weight, it causes the first ring 22 to slide downward on the outside of the valve body 1. The first ring 22 causes the first cylindrical rod 221 to slide into the inside of the second cylindrical rod 223 and squeeze the first spring 222. At the same time, the controller 225 is pressed, and an alarm is triggered to remind the staff to come and check.

[0026] like Figure 2 - Figure 4 As shown, the upper and lower ends of the outer shell 21 are respectively provided with U-shaped rods 232. The U-shaped rods 232 are respectively fixed to the outer shell 21 through the first rectangular block 233. The two U-shaped rods 232 are jointly fixed with the first rectangular strip 2321. The U-shaped rod 232 located at the lower end is fixed to one side of the valve body 1 through the first L-shaped rod 236.

[0027] like Figure 4 - Figure 6 As shown, the two cylinders 23 slide through the middle of the outer shell 21 respectively. The lower ends of the two cylinders 23 are rotatably connected to the first waist-shaped strip 234. The upper ends of the first L-shaped rod 236 are respectively fixed to the first cylindrical strip 235 at the positions corresponding to the first waist-shaped strip 234. The first waist-shaped strip 234 is slidably disposed on the outside of the first cylindrical strip 235. The upper middle part of the cylinder 23 is respectively provided with the irregular rod 24. The upper end of the irregular rod 24 is rotatably disposed in the middle of the U-shaped rod 232.

[0028] like Figure 4 As shown, the outer casing 21 has two first cylindrical wheels 25 rotatably mounted on the side near the valve body 1. Each of the first cylindrical wheels 25 has a third rectangular bar 251 rotatably mounted on both ends. The third rectangular bar 251 is fixed to one side of the U-shaped rod 232.

[0029] Specifically, the outer casing 21 is mounted on one side of the valve body 1 via a U-shaped rod 232 and a first L-shaped rod 236. When replacing the sponge sheet 2 inside the outer casing 21, the first waist-shaped strip 234 is driven to slide downwards outside the first cylindrical strip 235. The first waist-shaped strip 234 drives the cylinder 23 to slide downwards, separating the cylinder 23 from the shaped rod 24, until the cylinder 23 slides completely to the lower end of the outer casing 21. Then, the used sponge sheet 2 is taken out, and a new roll of sponge sheet 2 is placed inside the outer casing 21. Then, the cylinder 23 is driven to move downwards from the outer casing 21. Slide the cylinder 23 upwards so that one side of the cylinder 23 passes through the middle of the rolled sponge sheet 2 until the shaped rod 24 slides into the inside of the cylinder 23. Then pull out the end of the rolled sponge sheet 2 and pass it between the two first cylindrical wheels 25. Then wrap it around the outside of the connection between the valve body 1 and the pipe. Then fix the end of the sponge sheet 2 to the outside of the cylinder 23 on the other side. By driving the shaped rod 24, the cylinder 23 can be rotated, thereby rotating the rolled sponge sheet 2 to replace the sponge sheet 2 on the outside of the connection between the valve body 1 and the pipe.

[0030] like Figure 6 As shown, gears 242 are fixedly connected to the upper end of the irregular rod 24 via cylindrical blocks 241. A first rack 243 is provided on one side of each of the two gears 242. A second rectangular bar 246 is provided on the upper end of the first rack 243. The first rack 243 is slidably disposed at the lower end of the second rectangular bar 246. The two ends of the second rectangular bar 246 are fixedly connected to the first L-shaped rod 236 via second L-shaped rods 247.

[0031] like Figure 6 - Figure 7 As shown, a loop frame 244 is provided on the side of the first rack 243 away from the gear 242. A second cylindrical strip 2441 slides through the middle of both sides of the loop frame 244. One side of the second cylindrical strip 2441 is fixedly connected to the first rack 243. A second spring 2442 is fixedly connected between the first rack 243 and the loop frame 244. The second spring 2442 is located outside the second cylindrical strip 2441. A second rectangular block 245 is fixedly connected to the upper end of the loop frame 244. The second rectangular block 245 is slidably disposed at the lower end of the second rectangular strip 246.

[0032] like Figure 7 As shown, a second cylindrical wheel 26 is slidably disposed inside the outer shell 21 near the rolled sponge sheet 2, and a fourth rectangular strip 261 is fixedly connected to one side of the second cylindrical wheel 26, and the fourth rectangular strip 261 slidably passes through one side of the outer shell 21.

[0033] like Figure 7 - Figure 8As shown, a rectangular hole 2431 is provided in the middle of the first rack 243. A sixth rectangular rack 272 is fixedly connected to the side of the fourth rectangular rack 261 away from the second cylindrical wheel 26. A second rack 27 is fixedly connected to the upper end of the sixth rectangular rack 272 through the fifth rectangular rack 271. The second rack 27 is located in the middle of the loop frame 244. A second rectangular groove 2721 is provided on one side of the upper end of the sixth rectangular rack 272. A second waist-shaped strip 273 is provided at the upper end of the second rectangular groove 2721. The lower side of one end of the second waist-shaped strip 273 is slidably disposed in the second rectangular groove 2721 through a rectangular slider. The upper side of the second waist-shaped strip 273 away from the sixth rectangular rack 272 is rotatably disposed. The third waist-shaped strip 274 is rotatably mounted on the upper end of the second L-shaped rod 247 via a third cylindrical strip 2741 at its lower middle part. A fourth cylindrical strip 275 is rotatably mounted on the upper end of the third waist-shaped strip 274 away from the second waist-shaped strip 273. A first rectangular groove 2432 is formed at the lower end of the first rack 243 corresponding to the position of the fourth cylindrical strip 275. The fourth cylindrical strip 275 is slidably mounted in the first rectangular groove 2432 via a rectangular slider. A seventh rectangular strip 2721 is fixedly connected to the lower end of the sixth rectangular strip 272. An eighth rectangular strip 2722 is slidably mounted on the lower end of the seventh rectangular strip 2721 and fixedly connected to the upper end of the second L-shaped rod 247.

[0034] Specifically, by driving the second rectangular block 245 to slide at the lower end of the second rectangular bar 246, the second rectangular block 245 drives the loop frame 244 to slide to one side. The loop frame 244 drives the first rack 243 to slide to one side via the second cylindrical bar 2441. When the first rack 243 slides to one side, it drives the gear 242 to rotate. The gear 242 drives the irregular rod 24 to rotate via the cylindrical block 241. The irregular rod 24 drives the cylinder 23 to rotate, thereby driving the rolled sponge sheet 2 on the outside of the cylinder 23 to rotate, thus replacing the sponge sheet 2. The sponge sheet 2 is wrapped around the outside of the connection between the valve body 1 and the pipeline. When the sponge sheet 2 absorbs a large amount of oil, and reaches a certain weight, it causes the first ring 22 to move downwards, thereby touching the controller 225 at the upper end of the second ring 224 and triggering an alarm. Because sufficient space is needed for the sponge sheet 2 to slide downwards, in addition to keeping the sponge sheet 2 wrapped around the connection between the valve body 1 and the pipe taut, the rolled-up sponge sheet 2 needs to be pulled out further to allow for downward sliding. This is achieved by driving the sixth rectangular bar 272 to slide closer to the outer casing 21. The sixth rectangular bar 272, through the second waist-shaped bar 273, drives the third... The cylindrical bar 2741 rotates at the upper end of the second L-shaped rod 247. Simultaneously, the third oblong bar 274 rotates, driving the first rack 243 to move away from the gear 242 via the fourth cylindrical bar 275. The first rack 243 drives the second cylindrical bar 2441 to slide in the middle of the loop frame 244, compressing the second spring 2442. When the third oblong bar 274 rotates, one side of the second oblong bar 273 slides within the second rectangular groove 2721 via a rectangular slider, while the other side of the fourth cylindrical bar 275 slides within the first rectangular groove 2432 via a rectangular slider, causing the first rack 243 to engage with the gear 242. After temporary separation, the sixth rectangular bar 272 continues to move closer to the outer shell 21, while the fourth rectangular bar 261 drives the second cylindrical wheel 26 to move closer to the sponge sheet 2. The sixth rectangular bar 272 drives the second rack 27 to slide to the middle of the rectangular hole 2431 through the fifth rectangular bar 271, so that the second rack 27 meshes with the gear 242. When the second rack 27 moves, it drives the gear 242 to rotate. The gear 242 drives the lower cylinder 23 to rotate. The cylinder 23 drives the rolled sponge sheet 2 to rotate, so that the sponge sheet 2 is pulled out a distance, leaving room for the subsequent downward sliding of the sponge sheet 2.

[0035] Example 2: Figure 5 As shown in the comparative embodiment one, another embodiment of the present invention is as follows: a cover 211 is rotatably provided on both sides of the outer shell 21, and a silicone sheet 212 is fixedly connected to the side of the outer shell 21 near the first cylindrical wheel 25.

[0036] Specifically, by opening the cover 211, it is convenient to replace the sponge sheet 2 inside the outer shell 21. The sponge sheet 2 passes between the two first cylindrical wheels 25, and the first cylindrical wheels 25 clamp the sponge sheet 2 so that the sponge sheet 2 can be tightly attached to the outside of the connection between the valve body 1 and the pipeline. When the sponge sheet 2 is rotated, it drives the first cylindrical wheels 25 to rotate. Silicone sheets 212 are respectively provided on the side of the outer shell 21 near the first cylindrical wheels 25 to prevent contamination of the inside of the outer shell 21.

[0037] Working principle: When oil extraction is carried out in areas with strong winds and sand, when using this valve, the first waist-shaped strip 234 is driven to slide downward outside the first cylindrical strip 235. The first waist-shaped strip 234 drives the cylinder 23 to slide downward, so that the cylinder 23 separates from the shaped rod 24 until the cylinder 23 slides completely to the lower end of the outer shell 21. Then, the used sponge sheet 2 is taken out, and a new rolled sponge sheet 2 is placed inside the outer shell 21. Then, the cylinder 23 is driven to slide upward inside the outer shell 21, so that one side of the cylinder 23 passes through the middle of the rolled sponge sheet 2 until the shaped rod 24 slides into the inside of the cylinder 23. Then, the end of the rolled sponge sheet 2 is pulled out, and then the sponge sheet 2 is passed between the two first cylindrical wheels 25. Then, it is wrapped around the outside of the connection between the valve body 1 and the pipeline. Finally, the end of the sponge sheet 2 is fixed to the outside of the cylinder 23 on the other side. The sponge sheet 2 can prevent wind and sand from entering between the valve body 1 and the pipeline. After the valve body 1 and the pipeline have been connected for a long time, the seal may not be tight, which will cause leakage, increase safety hazards and environmental pollution. After leakage occurs, the sponge sheet 2 can absorb the leaked oil. When the sponge sheet 2 absorbs a lot of oil, when the sponge sheet 2 reaches a certain weight, it will drive the first ring 22 to move downward. The first ring 22 will drive the first cylindrical rod 221 to slide into the second cylindrical rod 223 and squeeze the first spring 222. At the same time, the controller 225 will be pressed to sound an alarm to remind the staff to come and check. After the alarm is triggered, the second rectangular block 245 is simultaneously driven to slide at the lower end of the second rectangular bar 246. The second rectangular block 245 drives the loop frame 244 to slide to one side. The loop frame 244 drives the first rack 243 to slide to one side via the second cylindrical bar 2441. When the first rack 243 slides to one side, it drives the gear 242 to rotate. The gear 242 drives the irregular rod 24 to rotate via the cylindrical block 241. The irregular rod 24 drives the cylinder 23 to rotate, thereby driving the rolled sponge sheet 2 on the outside of the cylinder 23 to rotate, thus replacing the sponge sheet 2. Because sufficient space is needed for the sponge sheet 2 to slide downwards, in addition to keeping the sponge sheet 2 taut around the connection between the valve body 1 and the pipe, the rolled-up sponge sheet 2 needs to be pulled out further to allow for downward sliding. This is achieved by driving the sixth rectangular bar 272 to slide closer to the outer casing 21. The sixth rectangular bar 272, through the second waist-shaped bar 273, drives the third cylindrical bar 2741 at the lower end of the third waist-shaped bar 274 to rotate at the upper end of the second L-shaped rod 247. Simultaneously, the rotation of the third waist-shaped bar 274, through the fourth cylindrical bar 274... 75 drives the first rack 243 to move away from the gear 242. The first rack 243 drives the second cylindrical strip 2441 to slide in the middle of the loop frame 244 and compress the second spring 2442. When the third waist-shaped strip 274 rotates, the second waist-shaped strip 273 on one side slides in the second rectangular groove 2721 through the rectangular slider, and the fourth cylindrical strip 275 on the other side slides in the first rectangular groove 2432 through the rectangular slider, so that the first rack 243 is temporarily separated from the gear 242. Then the sixth rectangular strip 272 continues to move closer to the outside. As shell 21 moves to one side, the second cylindrical wheel 26 moves closer to the sponge sheet 2 via the fourth rectangular bar 261. The sixth rectangular bar 272 drives the second rack 27 to slide to the middle of the rectangular hole 2431 via the fifth rectangular bar 271, so that the second rack 27 meshes with the gear 242. When the second rack 27 moves, it drives the gear 242 to rotate. The gear 242 drives the lower cylinder 23 to rotate. The cylinder 23 drives the rolled sponge sheet 2 to rotate, so that the sponge sheet 2 is pulled out a distance, leaving room for the subsequent downward sliding of the sponge sheet 2.

[0038] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. An oil wellhead valve, characterized in that: The valve body (1) is provided with a protective component on the outer side of its upper end. The protective component includes a sponge sheet (2) wrapped around the upper end of the valve body (1). A shell (21) is provided on one side of the valve body (1). A cylinder (23) is rotatably provided on both sides inside the shell (21). The rolled sponge sheet (2) is installed on the outer side of the cylinder (23) on one side. The end of the rolled sponge sheet (2) is pulled out and fixed on the outer side of the cylinder (23) on the other side. A detection component is provided at the lower end of the sponge sheet (2). The detection component includes a first ring (22) provided at the lower end of the sponge sheet (2). A second ring (224) is provided at the lower end of the first ring (22). An elastic component is provided between the first ring (22) and the second ring (224). The first ring (22) is slidably provided on the outer side of the valve body (1). A controller (225) is fixedly connected to the upper end of the second ring (224).

2. The wellhead valve according to claim 1, characterized in that: The elastic component includes a first cylindrical rod (221) fixed at the four corners of the lower end of the first ring (22), and a second cylindrical rod (223) fixed at the upper end of the second ring (224) at the position corresponding to the first cylindrical rod (221). The first cylindrical rod (221) can be slidably disposed inside the second cylindrical rod (223), and the first cylindrical rod (221) is fixed to the second cylindrical rod (223) by a first spring (222).

3. The wellhead valve according to claim 2, characterized in that: The outer shell (21) is provided with U-shaped rods (232) at its upper and lower ends respectively. The U-shaped rods (232) are fixed to the outer shell (21) through the first rectangular block (233) respectively. The two U-shaped rods (232) are fixed together by the first rectangular strip (2321). The U-shaped rod (232) at the lower end is fixed to one side of the valve body (1) through the first L-shaped rod (236).

4. The wellhead valve according to claim 3, characterized in that: Two cylinders (23) slide through the middle of the outer shell (21) respectively. The lower ends of the two cylinders (23) are rotatably connected to a first waist-shaped strip (234). The upper end of the first L-shaped rod (236) is fixed with a first cylindrical strip (235) corresponding to the position of the first waist-shaped strip (234). The first waist-shaped strip (234) is slidably disposed on the outside of the first cylindrical strip (235). The middle part of the upper end of the cylinder (23) is respectively provided with a special-shaped rod (24). The upper end of the special-shaped rod (24) is rotatably disposed in the middle of the U-shaped rod (232).

5. The wellhead valve according to claim 4, characterized in that: The outer casing (21) has two first cylindrical wheels (25) rotatably arranged on the side near the valve body (1). The first cylindrical wheels (25) have third rectangular bars (251) rotatably arranged at both ends. The third rectangular bars (251) are respectively fixed to one side of the U-shaped rod (232).

6. The wellhead valve according to claim 5, characterized in that: The upper end of the irregular rod (24) is fixed with gears (242) by cylindrical blocks (241). A first rack (243) is provided on one side of the two gears (242). A second rectangular bar (246) is provided on the upper end of the first rack (243). The first rack (243) is slidably disposed at the lower end of the second rectangular bar (246). The two ends of the second rectangular bar (246) are fixed to the first L-shaped rod (236) by second L-shaped rods (247).

7. The wellhead valve according to claim 6, characterized in that: A loop frame (244) is provided on the side of the first rack (243) away from the gear (242). A second cylindrical strip (2441) slides through the middle of both sides of the loop frame (244). One side of the second cylindrical strip (2441) is fixedly connected to the first rack (243). A second spring (2442) is fixedly connected between the first rack (243) and the loop frame (244). The second spring (2442) is located outside the second cylindrical strip (2441). A second rectangular block (245) is fixedly connected to the upper end of the loop frame (244). The second rectangular block (245) is slidably disposed at the lower end of the second rectangular strip (246).

8. The wellhead valve according to claim 7, characterized in that: Inside the outer shell (21), a second cylindrical wheel (26) is slidably disposed on the side near the rolled sponge sheet (2). A fourth rectangular strip (261) is fixedly connected to one side of the second cylindrical wheel (26), and the fourth rectangular strip (261) slides through one side of the outer shell (21).

9. The wellhead valve according to claim 8, characterized in that: A rectangular hole (2431) is provided in the middle of the first rack (243). A sixth rectangular bar (272) is fixedly connected to the side of the fourth rectangular bar (261) away from the second cylindrical wheel (26). A second rack (27) is fixedly connected to the upper end of the sixth rectangular bar (272) through the fifth rectangular bar (271). The second rack (27) is located in the middle of the loop frame (244). A second rectangular groove (2721) is provided on one side of the upper end of the sixth rectangular bar (2721). A second waist-shaped bar (273) is provided at the upper end of the second rectangular groove (2721). The lower side of one end of the second waist-shaped bar (273) is slidably disposed in the second rectangular groove (2721) through a rectangular slider. The upper side of the second waist-shaped bar (273) away from the sixth rectangular bar (272) is rotatably disposed. The third waist-shaped strip (274) is rotatably mounted on the upper end of the second L-shaped rod (247) via the third cylindrical strip (2741) at the middle of its lower end. A fourth cylindrical strip (275) is rotatably mounted on the side of the upper end of the third waist-shaped strip (274) away from the second waist-shaped strip (273). A first rectangular groove (2432) is opened at the lower end of the first rack (243) corresponding to the position of the fourth cylindrical strip (275). The fourth cylindrical strip (275) is slidably mounted in the first rectangular groove (2432) via a rectangular slider. A seventh rectangular strip (2721) is fixedly connected to the lower end of the sixth rectangular strip (272). An eighth rectangular strip (2722) is slidably mounted to the lower end of the seventh rectangular strip (2721). The eighth rectangular strip (2722) is fixedly connected to the upper end of the second L-shaped rod (247).

10. An oil wellhead valve according to claim 9, characterized in that: The outer shell (21) is rotatably provided with a cover (211) on both sides, and a silicone sheet (212) is fixedly attached to the side of the outer shell (21) near the first cylindrical wheel (25).

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