Sand removing device for natural gas wellhead

Abstract

The invention relates to the technical field of mixture separation, in particular to a sand removal device for a natural gas wellhead, a shell assembly comprises a protective shell, a gas outlet pipe is mounted above the protective shell, a cooling assembly is mounted on the outer side of the gas outlet pipe, an adsorption assembly is mounted in the protective shell, and a flow guide assembly is mounted in the adsorption assembly; the adsorption assembly comprises a gas rising barrel, adsorption discs are installed on the two sides of the inner wall of the gas rising barrel, the adsorption discs and the cleaning trolley are arranged, automatic cleaning of the interior of the device is facilitated through gravity, the problem that the interior of a natural gas well is adsorbed by sand and dust and is difficult to clean is solved, meanwhile, a cooling vessel and a driving conical wheel are arranged, and the cleaning efficiency is improved. And the cooling liquid in the cooling vessel can circulate in the cooling pipe by utilizing the rising wind power of the natural gas, so that the gas is cooled, and the problem that the temperature of the exhausted gas is increased due to heat generated by friction of sand and dust in the gas well is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of mixture separation, and more particularly to a sand removal device for a natural gas wellhead. Background Art

[0002] A natural gas production well, i.e., a gas production well, which extracts underground natural gas resources to the ground and then converts them into products and benefits, is an important industrial facility for exploiting underground natural gas resources. During the process of natural gas exploitation, due to reasons such as excessive production pressure difference and loose cementation of sandstone oil and gas reservoir rocks, formation sand may flow into the wellbore, reach the wellhead together with the gas, causing blockage of the gas outlet channel and even shutdown of the gas well. Sand production not only affects the normal production of the gas well, reduces the gas production quality, increases the treatment difficulty, but also causes wear and corrosion to downhole equipment.

[0003] The existing natural gas wellhead sand removal devices and sand removal steps are mainly as follows: A hydrocyclone is a device that uses the centrifugal force generated during the rotation of a fluid to separate sand particles from gas. It generally includes parts such as a cylinder, a cone, an overflow pipe, a feed inlet, a bottom outlet, and a sand collection cylinder. When the multiphase sand-carrying liquid enters the separation cylinder, a high-speed spiralized internal and external flow field is formed. Under the action of centrifugal force, the light phase (such as natural gas) accumulates in the center of the cyclone and flows out from the upper overflow pipe; while the solid particles (such as sand particles) are thrown towards the wall surface and migrate towards the bottom under the action of gravity, and enter the sand collection cylinder from the lower bottom outlet. It has the advantages of simple structure, convenient operation, high sand removal efficiency, etc., and has been widely used in natural gas exploitation; A filter sand remover intercepts and removes sand particles in the airflow through a filtering medium (such as a filter screen, a filter element, etc.).

[0004] According to the analysis of the existing natural gas well sand removal process, it can be seen that the traditional sand removal means have the following deficiencies: Natural gas flows through the interior of the device for a long time, and the treatment of dust in the device only relies on the self-weight sliding of the dust, and the best sand removal effect cannot be maintained; at the same time, when the gas flows inside the device, the gas often makes a sharp turn, and the dust will rub against the interior of the device, causing the gas temperature to rise, presenting a safety hazard. Summary of the Invention

[0005] In order to overcome the above-mentioned defects of the prior art, the present invention provides a sand removal device for a natural gas wellhead to solve the problems existing in the above-mentioned background art.

[0006] The present invention provides the following technical solution: A sand removal device for a natural gas wellhead, including a housing assembly. The housing assembly includes a protective housing. An air outlet pipe is installed above the protective housing. A cooling assembly is installed outside the air outlet pipe. An adsorption assembly is installed inside the protective housing. A diversion assembly is installed inside the adsorption assembly. The diversion assembly includes diversion strips. The adsorption assembly includes a gas rising barrel. Adsorption discs are installed on both sides of the inner wall of the gas rising barrel. The installation positions of the adsorption discs are at the upper and lower gaps of the diversion strips. A fixed cantilever is installed at the central axis of the adsorption disc. The adsorption disc can rotate under the fixation of the fixed cantilever; Further, a gas extraction pipe is installed at the bottom of the adsorption assembly. A dust collection assembly is installed at the bottom of the protective housing. Support columns are installed around the bottom of the protective housing.

[0007] Further, an exhaust port is opened at the upper end of the gas rising barrel. A diversion inverted cone is installed inside the gas rising barrel, and the diversion inverted cone is fixedly connected to the inner side of the diversion strip.

[0008] Further, a dust separation brush is installed at the lower part of the fixed cantilever, and the dust separation brush is in contact with the adsorption disc. A dust concentration box is installed directly below the adsorption disc. A box body rotating shaft is installed at the middle position of the dust concentration box. The dust concentration box can rotate around the box body rotating shaft.

[0009] Further, a sand discharge port is opened at one end of the bottom of the dust concentration box away from the gas rising barrel. A transmission lever is installed below the dust concentration box. A lever central axis is installed at a quarter section of the transmission lever, and the long end is located directly below the dust concentration box. A transmission cylinder is installed at the short end of the transmission lever. An angular variable sensor is installed inside the transmission cylinder. A push block is installed on one side of the transmission cylinder close to the transmission lever, and the push block is located above the short end of the transmission lever.

[0010] Further, a one-way cam is installed at one end of the transmission cylinder away from the push block. A limit frame is installed outside the one-way cam. A return spring is installed at one end of the limit frame away from the dust concentration box, and the return spring is fixed to the inner wall of the protective housing. A funnel fixing block is installed at one end of the limit frame close to the dust concentration box. A sand discharge funnel is installed at one end of the funnel fixing block close to the dust concentration box. The sand discharge funnel is located directly below the sand discharge port.

[0011] Further, a cleaning trolley is installed on the upper surface of the diversion strip. The cleaning trolley includes a trolley body. A cleaning brush is installed below the trolley body. Two moving rollers are respectively installed at the front end and the rear end below the trolley body. The moving rollers are slidably connected to the upper surface of the diversion strip. Guide pulleys are installed outside the moving rollers, and the guide pulleys are slidably connected to the inner wall of the diversion strip.

[0012] Further, a cooling dish is installed on the outer side of the air outlet pipe. A cooling pipe is installed inside the cooling dish. The axis of the cooling pipe is horizontal. The cooling pipe passes through the middle of the air outlet pipe. A driving cone pulley is installed at the central position inside the cooling pipe. A fan rotating shaft is installed below the driving cone pulley. A wind fan is installed below the fan rotating shaft. A first driven wheel and a second driven wheel are meshed and installed on both sides of the driving cone pulley. One-way augers are installed at the ends of the first driven wheel and the second driven wheel away from the driving cone pulley.

[0013] Technical effects and advantages of the present invention: 1. By providing an adsorption disc and a cleaning cart, the present invention is conducive to realizing automatic cleaning inside the device by using the action of gravity, ensuring that the adsorption disc always maintains the best adsorption effect, and preventing excessive dust adhesion on the surface of the drainage strip, thus solving the problem that it is difficult to clean the inside of the natural gas well adsorbed by dust.

[0014] 2. By providing a cooling dish and a driving cone pulley, the present invention is conducive to driving the wind fan to rotate by using the wind force of the rising natural gas, making the cooling liquid in the cooling dish circulate inside the cooling pipe, thereby cooling the flowing gas, and solving the problem that the temperature of the discharged gas rises due to the heat generated by the friction of dust inside the gas well. Description of the drawings

[0015] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0016] Figure 2 It is a sectional view of the overall structure of the present invention.

[0017] Figure 3 It is a schematic diagram of the inside of the gas rising barrel of the present invention.

[0018] Figure 4 It is a schematic diagram of an embodiment after the adsorption disc structure of the present invention adsorbs dust.

[0019] Figure 5 It is a schematic diagram of the dust concentration box structure of the present invention.

[0020] Figure 6 It is a schematic diagram of the internal structure of the one-way cam of the present invention.

[0021] Figure 7 It is a schematic diagram of the drainage strip structure of the present invention.

[0022] Figure 8 It is a schematic diagram of the cleaning cart structure of the present invention.

[0023] Figure 9 It is a schematic diagram of the cooling component structure of the present invention.

[0024] The reference numerals are as follows: 1. housing assembly; 101. protective housing; 102. air outlet pipe; 103. gas extraction pipeline; 104. support column; 2. diversion assembly; 201. drainage inverted cone; 202. drainage strip; 203. cleaning cart; 2031. cart body; 2032. moving roller; 2033. guiding pulley; 2034. cleaning brush; 3. adsorption assembly; 301. gas rising barrel; 3011. exhaust port; 302. adsorption disc; 3021. fixed cantilever; 303. dust separation brush; 304. dust concentration box; 3041. box body rotating shaft; 3042. sand discharge port; 305. transmission lever; 3051. lever central axis; 306. transmission cylinder; 3061. pushing block; 307. sand discharge funnel; 3071. funnel fixing block; 308. one-way cam; 3081. limiting frame; 3082. one-way tooth; 3083. cam central axis; 3084. blocking block; 309. return spring; 4. cooling assembly; 401. cooling dish; 402. cooling pipe; 403. one-way auger; 404. wind fan; 405. fan rotating shaft; 406. driving conical wheel; 407. first driven wheel; 408. second driven wheel; 5. dust collection assembly. Detailed implementation manners

[0025] The technical solutions in the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the present invention. In addition, the forms of the various structures described in the following embodiments are merely examples. A sand removal device for a natural gas wellhead involved in the present invention is not limited to the various structures described in the following embodiments. All other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present invention.

[0026] Referring to Figure 1 and Figure 2 the present invention provides a sand removal device for a natural gas wellhead, including a housing assembly 1. The housing assembly 1 includes a protective housing 101. An air outlet pipe 102 is installed above the protective housing 101. A cooling assembly 4 is installed outside the air outlet pipe 102. An adsorption assembly 3 is installed inside the protective housing 101. A diversion assembly 2 is installed inside the adsorption assembly 3. A gas extraction pipeline 103 is installed at the bottom of the adsorption assembly 3. A dust collection assembly 5 is installed at the bottom of the protective housing 101. Support columns 104 are installed around the bottom of the protective housing 101; In this embodiment, it should be specifically noted that: The natural gas collected from the gas well enters the interior of the device at the gas production pipeline 103. At this time, the initial velocity of the gas is generally between two meters per second and twenty meters per second. The gas will rotate and rise under the guidance of the diversion component 2. Due to inertia and centrifugal force, the dust mixed in the natural gas will be thrown onto the inner wall of the adsorption component 3, and at the same time, the dust will be adsorbed locally in the adsorption component 3 and finally collected in the support column 104. Since the density of natural gas is lower than that of air, the gas rises from the inside of the adsorption component 3 to the inside of the outlet pipe 102, is cooled by the cooling component 4, and finally discharged from the device and enters other treatment processes. At the same time, cleaning devices are installed locally on the diversion component 2 and the adsorption component 3, which can automatically remove the dust on the surface.

[0027] The main difference between this embodiment and the prior art is that in this embodiment, the impact force of natural gas at high flow velocity is used as the power to drive the internal structure of the device to separate dust from the gas and cool it, specifically in the adsorption component 3 and the cooling component 4; The above structure is the main structure of this embodiment, which solves the problem that it is difficult to clean the inside of the natural gas well adsorbed by dust. Secondly, it also solves the problem that the temperature of the discharged gas rises due to the heat generated by the friction of dust inside the gas well.

[0028] Refer to Figure 3 , the adsorption component 3 includes a gas rising barrel 301. Adsorption discs 302 are installed on both sides of the inner wall of the gas rising barrel 301. An exhaust port 3011 is opened at the upper end of the gas rising barrel 301. A drainage inverted cone 201 is installed inside the gas rising barrel 301, and drainage strips 202 are installed on the outside of the drainage inverted cone 201. The adsorption discs 302 are installed at the upper and lower gaps of the drainage strips 202.

[0029] In this embodiment, it should be specifically noted that: The collected natural gas enters the device from the gas production pipeline 103 and is tangentially conveyed to the bottom end of the drainage strip 202. Under the drainage action of the drainage strip 202, the gas spirally rises along the drainage strip 202. Due to the centrifugal force generated when the gas rotates, the solid particles mixed in the gas are thrown onto the inner wall of the gas rising barrel 301 and slide down due to gravity. At the same time, due to the inertia of the object, when the gas makes a sharp turn, the mixed dust will continue to fly forward to the position of the adsorption disc 302 and be adsorbed by the adsorption disc 302; The natural gas that escapes from the adsorption disc 302 to the outside of the gas rising barrel 301 will move upward inside the protective shell 101 due to the lower density of natural gas than air and return to the inside of the gas rising barrel 301 from the exhaust port 3011.

[0030] Refer to Figure 4, a fixed cantilever 3021 is installed at the central axis of the adsorption disc 302. A dust separation brush 303 is installed at the lower part of the fixed cantilever 3021, and the dust separation brush 303 is in contact with the adsorption disc 302. The adsorption disc 302 can rotate under the fixation of the fixed cantilever 3021. A dust concentration box 304 is installed directly below the adsorption disc 302. A box body rotating shaft 3041 is installed at the middle position of the dust concentration box 304, and the dust concentration box 304 can rotate around the box body rotating shaft 3041 as the axis.

[0031] In this embodiment, it should be specifically noted that: when a layer of dust is adsorbed on one side of the adsorption disc 302 close to the inside of the gas rising barrel 301, due to the gravity of this side of the adsorption disc 302 being greater than the other side, the adsorption disc 302 rotates, and the part adsorbed with dust rotates to the lower part and comes into contact with the dust separation brush 303. The dust separation brush 303 will brush off the dust attached to this part, making this side clean. Subsequently, the dust inside the gas rising barrel 301 is adsorbed by other surfaces of the adsorption disc 302; when the dust is brushed off by the dust separation brush 303, the dust falls into the inside of the dust concentration box 304 for temporary collection; In this application, using gravity as the acting force for the rotation of the adsorption disc 302 is one of the preferred implementation manners. Other alternative technical means include jointly implementing with the installation of a pressure sensor and a motor. It should be noted that the collection method of dust is limited and protected in this application, and the rotation control method of the adsorption disc 302 is not limited.

[0032] The adsorption disc 302 can capture particulate matter by using filter cloth processed from cotton, wool, or man-made fibers, etc., or enhance the adsorption effect with a wet porous filter material, or make the particulate matter in the gas charged and move towards the electrode under the action of the electric field force, and finally deposit on the electrode. Therefore, the specific structure and connection method of the adsorption disc 302 for adsorbing solid particles are existing structures, and no specific limitation is made in this embodiment.

[0033] Refer to Figure 5 and Figure 6, a sand falling port 3042 is provided at one end of the bottom of the dust concentration box 304 away from the gas rising barrel 301. A transmission lever 305 is installed below the dust concentration box 304. A lever central axis 3051 is installed at a quarter section of the transmission lever 305, and the long end is located directly below the dust concentration box 304. A transmission cylinder 306 is installed at the short end of the transmission lever 305. An angular variable sensor is installed inside the transmission cylinder 306. A pushing block 3061 is installed on one side of the transmission cylinder 306 close to the transmission lever 305, and the pushing block 3061 is located above the short end of the transmission lever 305. A one-way cam 308 is installed at one end of the transmission cylinder 306 away from the pushing block 3061. A limit frame 3081 is installed on the outer side of the one-way cam 308. A return spring 309 is installed at one end of the limit frame 3081 away from the dust concentration box 304, and the return spring 309 is fixed on the inner wall of the protective housing 101. A funnel fixing block 3071 is installed at one end of the limit frame 3081 close to the dust concentration box 304. A sand falling funnel 307 is installed at one end of the funnel fixing block 3071 close to the dust concentration box 304. The sand falling funnel 307 is located directly below the sand falling port 3042; A cam central axis 3083 is installed inside the one-way cam 308. A blocking block 3084 is installed on the upper surface of the cam central axis 3083. One-way teeth 3082 are provided on the periphery of the cam central axis 3083.

[0034] In this embodiment, it should be specifically noted that when the dust is brushed off by the dust separation brush 303, the dust will concentrate on one side of the dust concentration box 304 close to the gas rising barrel 301. Due to the unbalanced gravity on both sides of the dust concentration box 304, the dust concentration box 304 will rotate around the box body rotation axis 3041 in the direction close to the gas rising barrel 301. The dust concentration box 304 presses down the long end of the transmission lever 305. Then, the transmission lever 305 rotates around the lever central axis 3051. The short end of the transmission lever 305 rises and contacts the pushing block 3061. The rising of the transmission lever 305 pushes the pushing block 3061 to move upward. The pushing block 3061 drives the transmission cylinder 306 to rotate. The rotation of the transmission cylinder 306 drives the one-way cam 308 to rotate. When the one-way cam 308 rotates, it will periodically push the limit frame 3081 left and right. The limit frame 3081 drives the funnel fixing block 3071 to move back and forth left and right. The movement of the funnel fixing block 3071 drives the sand falling funnel 307 to shake, which is beneficial to discharging the residual dust inside the sand falling funnel 307. The limit frame 3081 can finally return to the initial position under the pulling force of the return spring 309; When the drive cylinder 306 rotates to a certain angle, the angular variable sensor inside the drive cylinder 306 recognizes the angle and drives the drive cylinder 306 to rotate in the opposite direction. At this time, the push block 3061 presses down the short end of the drive lever 305, driving the long end of the drive lever 305 to lift the dust concentration box 304 upward. The dust concentration box 304 rotates around the box body rotation axis 3041, making the part of the dust concentration box 304 above the drive lever 305 higher than the part of the dust concentration box 304 above the sand discharge funnel 307. The dust inside the dust concentration box 304 will pour down to the sand discharge port 3042 and slide from the sand discharge port 3042 into the inside of the sand discharge funnel 307. At this time, the rotation direction of the drive cylinder 306 is opposite to the tooth direction of the one-way tooth 3082, and the blocking block 3084 blocks the rotation of the one-way cam 308 inside the one-way tooth 3082, keeping the position of the sand discharge funnel 307 unchanged during dust pouring, ensuring the accuracy of the dust falling into the sand discharge funnel 307. At this time, the one-way cam 308 and the drive cylinder 306 slide relative to each other, and the drive cylinder 306 continues to rotate in the reverse direction; Refer to Figure 7 and Figure 8 As shown in, a cleaning cart 203 is installed on the upper surface of the drainage strip 202. The cleaning cart 203 includes a cart body 2031. A cleaning brush 2034 is installed below the cart body 2031. Two moving rollers 2032 are respectively installed at the front end and the rear end below the cart body 2031. The moving rollers 2032 are slidably connected to the upper surface of the drainage strip 202. A guiding pulley 2033 is installed on the outer side of the moving roller 2032, and the guiding pulley 2033 is slidably connected to the inner wall of the drainage strip 202.

[0035] In this embodiment, it should be specifically noted that: Preferably, the edge height of the drainage strip 202 is lower than the middle height in the same horizontal section; The guiding pulley 2033 keeps the position of the cleaning cart 203 on the surface of the drainage strip 202, enabling the cleaning cart 203 to move up and down along the drainage strip 202. The natural gas collected in the gas well enters the inside of the gas rising barrel 301 at a high flow rate and spirally rises upward along the drainage strip 202. The gas will drive the cleaning cart 203 to move along the upper surface of the drainage strip 202 to the upper end of the drainage strip 202. At this time, the cleaning cart 203 stays at the upper end of the drainage strip 202. At this time, the cleaning cart 203 is in balance under the downward gravity and the upward impact force of the gas; Preferably, a control component and a sensor are installed inside the cleaning cart 203, and the two are electrically connected. A blowing component is provided in the cleaning brush 2034 at the bottom, increasing the friction force between the cleaning brush 2034 and the surface of the drainage strip 202 and enhancing the cleaning effect, or actively controlling the moving direction and speed of the cleaning cart 203. The electronic control component is a conventional structure, and the specific structure and connection method of the electronic control component and the sensor are not specifically described in this embodiment.

[0036] When the gas transportation at the gas extraction pipeline 103 is suspended, the cleaning trolley 203 slides downward along the drainage strip 202 under the control of the controller, and the cleaning brush 2034 will clean the surface of the drainage strip 202 during the movement of the cleaning trolley 203.

[0037] Refer to Figure 9 , a cooling dish 401 is installed outside the air outlet pipe 102, a cooling pipe 402 is installed inside the cooling dish 401, the axis of the cooling pipe 402 is horizontal, the cooling pipe 402 passes through the middle of the air outlet pipe 102, a driving conical wheel 406 is installed at the central position inside the cooling pipe 402, a fan rotating shaft 405 is installed below the driving conical wheel 406, a wind fan 404 is installed below the fan rotating shaft 405, the driving conical wheel 406 is meshed with a first driven wheel 407 and a second driven wheel 408 on both sides, and a one-way auger 403 is installed at one end of the first driven wheel 407 and the second driven wheel 408 away from the driving conical wheel 406.

[0038] In this embodiment, it should be specifically noted that: the shape of the wind fan 404 enables the wind fan 404 to rotate driven by the wind, and the inside of the cooling dish 401 is filled with a coolant; the two one-way augers 403 connected to the first driven wheel 407 and the second driven wheel 408 are mirror structures, so that the refrigerant is transported unidirectionally in the cooling pipe 402; When natural gas enters the inside of the air outlet pipe 102 from the bottom of the air outlet pipe 102, the gas drives the wind fan 404 to rotate, the rotation of the wind fan 404 drives the fan rotating shaft 405 to rotate, the rotation of the fan rotating shaft 405 drives the driving conical wheel 406 to rotate, the driving conical wheel 406 drives the first driven wheel 407 and the second driven wheel 408 to rotate, the rotation of the first driven wheel 407 and the second driven wheel 408 drives the one-way auger 403 to rotate, and the one-way auger 403 makes the liquid inside the cooling dish 401 enter the inside of the cooling pipe 402 from one end of the cooling pipe 402 and reach the other end of the cooling pipe 402 and return to the inside of the cooling dish 401 under the conveying action of the one-way auger 403. When the gas flows through the positions of the cooling dish 401 and the cooling pipe 402, the heat dissipates under the action of the coolant.

[0039] The working principle of the present invention: The main problems solved in this embodiment are as follows: By providing the adsorption disc 302 and the cleaning cart 203, and utilizing the gravitational force, in cooperation with the dust separation brush 303 and the cleaning brush 2034, after dust is adsorbed on one side of the adsorption disc 302, it automatically rotates and is cleaned, so that the clean side of the adsorption disc 302 is always located inside the gas rising barrel 301. When the natural gas transportation at the gas extraction pipeline 103 pauses, the cleaning cart 203 descends along the drainage strip 202 to clean the surface of the drainage strip 202, solving the problem that it is difficult to clean the inside of the natural gas well adsorbed by dust; Secondly, by providing the cooling dish 401 and the driving cone wheel 406, using the wind force of the rising natural gas as the power to drive the wind turbine 404 to rotate, so that the coolant in the cooling dish 401 circulates inside the cooling pipe 402 to cool the flowing gas, solving the problem that the temperature of the discharged gas increases due to the heat generated by the friction of dust inside the gas well.

[0040] The specific steps are as follows: First, place this device stably at the natural gas wellhead, connect the gas extraction pipeline 103 to the pipeline of the gas extraction well, and then the gas extraction well can be started.

[0041] The collected natural gas is tangentially transported from the gas extraction pipeline 103 to the bottom end of the drainage strip 202. Under the drainage action of the drainage strip 202, the gas spirally rises along the drainage strip 202. The gas will drive the cleaning cart 203 to move upward along the upper surface of the drainage strip 202 to the upper end of the drainage strip 202. At this time, a balance is formed between the downward gravity of the cleaning cart 203 and the upward impact force of the gas; Due to the centrifugal force generated when the gas rotates, the solid particles mixed in the gas are thrown onto the inner wall of the gas rising barrel 301 and slide into the inside of the dust collection assembly 5 due to gravity. At the same time, due to the inertia of the object, when the gas makes a sharp turn, the mixed dust will continue to fly forward to the position of the adsorption disc 302 and be adsorbed by the adsorption disc 302; When a layer of dust is adsorbed on the side of the adsorption disc 302 close to the inside of the gas rising barrel 301, since the gravity of this side of the adsorption disc 302 is greater than that of the other side, the adsorption disc 302 rotates, and the part adsorbed with dust rotates to the lower part, or the adsorption disc 302 rotates driven by the motor. At this time, the part adhering to the dust contacts the dust separation brush 303, and the dust separation brush 303 will brush off the dust adhering to this part to make this side clean. Subsequently, the other side of the adsorption disc 302 adsorbs the dust inside the gas rising barrel 301; When the dust is brushed off by the dust separation brush 303, the dust falls into the inside of the dust concentration box 304 for temporary collection; At this time, the dust is concentrated on one side of the dust concentration box 304 close to the gas rising barrel 301 inside the dust concentration box 304, causing the gravity on both sides of the dust concentration box 304 to be unbalanced. The dust concentration box 304 will rotate around the box body rotation axis 3041 towards the direction close to the gas rising barrel 301. The dust concentration box 304 presses down the long end of the transmission lever 305. Then, the transmission lever 305 rotates around the lever central axis 3051. The short end of the transmission lever 305 rises and contacts the push block 3061. The rising of the transmission lever 305 pushes the push block 3061 to move upward. The push block 3061 drives the transmission cylinder 306 to rotate. The rotation of the transmission cylinder 306 drives the one-way cam 308 to rotate. When the one-way cam 308 rotates, it periodically pushes the limit frame 3081 left and right. The limit frame 3081 drives the funnel fixing block 3071 to move left and right reciprocally. The movement of the funnel fixing block 3071 drives the sand dropping funnel 307 to shake, preventing the remaining dust from blocking inside the sand dropping funnel 307. The limit frame 3081 can finally return to the initial position under the pulling force of the return spring 309; When the transmission cylinder 306 rotates to a certain angle, the angular variable sensor inside the transmission cylinder 306 recognizes the angle and drives the transmission cylinder 306 to rotate in the opposite direction. At this time, the push block 3061 presses down the short end of the transmission lever 305, driving the long end of the transmission lever 305 to jack up the dust concentration box 304 upward. The dust concentration box 304 rotates around the box body rotation axis 3041, making the part of the dust concentration box 304 above the transmission lever 305 higher than the part of the dust concentration box 304 above the sand dropping funnel 307. At this time, the dust inside the dust concentration box 304 will pour towards the sand dropping port 3042 and slide from the sand dropping port 3042 into the inside of the sand dropping funnel 307. And at this time, the rotation direction of the transmission cylinder 306 is opposite to the tooth direction of the one-way tooth 3082. The blocking block 3084 blocks the rotation of the one-way cam 308 inside the one-way tooth 3082. The one-way cam 308 and the transmission cylinder 306 slide relative to each other, keeping the position of the sand dropping funnel 307 unchanged when the dust is poured, ensuring the accuracy of the dust falling into the sand dropping funnel 307. The transmission cylinder 306 then continues to rotate in the reverse direction. After the dust in the dust concentration box 304 is poured, the transmission cylinder 306 rotates to the initial position; When natural gas is transported inside the gas rising barrel 301, the friction between the dust and the inner wall of the device causes the temperature of the gas to rise. When the gas enters the inside of the outlet pipe 102 from the bottom of the outlet pipe 102, the gas drives the wind turbine 404 to rotate. The rotation of the wind turbine 404 drives the fan rotating shaft 405 to rotate. The rotation of the fan rotating shaft 405 drives the driving conical wheel 406 to rotate. The driving conical wheel 406 drives the first driven wheel 407 and the second driven wheel 408 to rotate. The rotation of the first driven wheel 407 and the second driven wheel 408 drives the one-way auger 403 to rotate. The one-way auger 403 causes the liquid inside the cooling dish 401 to enter the inside of the cooling pipe 402 from one end of the cooling pipe 402, and reaches the other end of the cooling pipe 402 and returns to the inside of the cooling dish 401 under the conveying action of the one-way auger 403. Thus, when the gas flows through the positions of the cooling dish 401 and the cooling pipe 402, heat is dissipated under the action of the coolant; When the gas transportation at the gas extraction pipeline 103 pauses, the cleaning cart 203 moves downward along the drainage strip 202 under the control of the control component. The cleaning brush 2034 will actively clean the surface of the drainage strip 202 during the movement of the cleaning cart 203.

[0042] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A sand removal device for a natural gas wellhead, comprising a housing assembly (1), characterized in that: The housing assembly (1) includes a protective housing (101). An air outlet pipe (102) is installed above the protective housing (101). A cooling assembly (4) is installed outside the air outlet pipe (102). An adsorption assembly (3) is installed inside the protective housing (101). A diversion assembly (2) is installed inside the adsorption assembly (3). The diversion assembly (2) includes diversion strips (202). The adsorption assembly (3) includes a gas rising barrel (301). Adsorption discs (302) are installed on both sides of the inner wall of the gas rising barrel (301). The installation positions of the adsorption discs (302) are at the upper and lower gaps of the diversion strips (202). A fixed cantilever (3021) is installed at the central axis of the adsorption disc (302). The adsorption disc (302) can rotate under the fixation of the fixed cantilever (3021).

2. The sand removal device for a natural gas wellhead according to claim 1, characterized in that: A gas collection pipe (103) is installed at the bottom of the adsorption assembly (3). A dust collection assembly (5) is installed at the bottom of the protective housing (101). Support columns (104) are installed around the bottom of the protective housing (101).

3. The sand removal device for a natural gas wellhead according to claim 1, wherein: An exhaust port (3011) is opened at the upper end of the gas rising barrel (301). A diversion inverted cone (201) is installed inside the gas rising barrel (301), and the diversion inverted cone (201) is fixedly connected to the inner side of the diversion strip (202).

4. A sand removal device for a natural gas wellhead according to claim 1, characterized in that: A dust separation brush (303) is installed at the lower part of the fixed cantilever (3021), and the dust separation brush (303) contacts the adsorption disc (302). A dust concentration box (304) is installed directly below the adsorption disc (302). A box body rotating shaft (3041) is installed at the middle position of the dust concentration box (304). The dust concentration box (304) can rotate around the box body rotating shaft (3041).

5. The sand removal device for a natural gas wellhead according to claim 4, characterized in that: A sand falling port (3042) is opened at one end of the bottom of the dust concentration box (304) away from the gas rising barrel (301). A transmission lever (305) is installed below the dust concentration box (304). A lever central axis (3051) is installed at a quarter section of the transmission lever (305), and the long end is located directly below the dust concentration box (304). A transmission cylinder (306) is installed at the short end of the transmission lever (305). An angular variable sensor is installed inside the transmission cylinder (306). A push block (3061) is installed on one side of the transmission cylinder (306) close to the transmission lever (305), and the push block (3061) is located above the short end of the transmission lever (305).

6. The sand removal device for a natural gas wellhead according to claim 5, characterized in that: One end of the transmission cylinder (306) away from the pushing block (3061) is provided with a one-way cam (308). A cam central shaft (3083) is installed inside the one-way cam (308). A blocking block (3084) is installed on the upper surface of the cam central shaft (3083). One-way teeth (3082) are provided on the periphery of the cam central shaft (3083). A limiting frame (3081) is installed outside the one-way cam (308). One end of the limiting frame (3081) away from the dust concentration box (304) is provided with a return spring (309). The return spring (309) is fixed on the inner wall of the protective housing (101). One end of the limiting frame (3081) close to the dust concentration box (304) is provided with a funnel fixing block (3071). One end of the funnel fixing block (3071) close to the dust concentration box (304) is provided with a sand dropping funnel (307). The sand dropping funnel (307) is located directly below the sand dropping port (3042).

7. The sand removal device for a natural gas wellhead according to claim 1, characterized in that: A cleaning cart (203) is installed on the upper surface of the drainage strip (202). The cleaning cart (203) includes a cart body (2031). A cleaning brush (2034) is installed below the cart body (2031). Two moving rollers (2032) are respectively installed at the front end and the rear end below the cart body (2031). The moving rollers (2032) are slidably connected to the upper surface of the drainage strip (202). Guide pulleys (2033) are installed on the outer sides of the moving rollers (2032). The guide pulleys (2033) are slidably connected to the inner wall of the drainage strip (202).

8. The sand removal device for a natural gas wellhead according to claim 1, characterized in that: A cooling dish (401) is installed outside the air outlet pipe (102). A cooling pipe (402) is installed inside the cooling dish (401). The axis of the cooling pipe (402) is horizontal. The cooling pipe (402) passes through the middle of the air outlet pipe (102). A driving conical wheel (406) is installed at the central position inside the cooling pipe (402). A fan rotating shaft (405) is installed below the driving conical wheel (406). A wind fan (404) is installed below the fan rotating shaft (405). A first driven wheel (407) and a second driven wheel (408) are meshed and installed on both sides of the driving conical wheel (406). One-way augers (403) are installed at the ends of the first driven wheel (407) and the second driven wheel (408) away from the driving conical wheel (406).

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