A fracturing gas production wellhead device capable of automatic detection and early warning

Abstract

The present invention relates to the technical field of gas production equipment, and specifically to a fracturing gas production wellhead device capable of automatic detection and early warning, comprising a four-way body, and also comprising: a detection component, the detection component comprising a fixed seat installed inside the four-way body, a first pressure sensor and a flow sensor are installed on the fixed seat, and data detected by the detection component are integrated into a central control system. When an abnormality is detected, an early warning signal is triggered. Under the action of a blocking mechanism, the cleaning speed of a scraper on a filter is greatly reduced, thereby extending the service life of the scraper. At the same time, part of the power consumed by the cleaning mechanism will be converted into air pressure for storage. When natural gas leaks in normal working conditions and is detected by the detection component, the blocking mechanism blocks the filter, greatly reducing the leakage. Even if leakage occurs when no gas is produced, this part of the stored power is released and can still block the filter.

Description

Technical Field

[0001] The present invention relates to the technical field of gas production equipment, and in particular to a fracturing gas production wellhead device capable of automatic detection and early warning. Background Art

[0002] Fracturing is the process of artificially creating cracks in the formation to improve the flow environment of natural gas underground and increase the production of natural gas wells. It plays an important role in improving the flow conditions at the bottom of the well, slowing down the flow between layers and improving the utilization of oil layers. As we all know, there are many fragments in the well. During the pumping process, the fragments are easily extracted, and the storage resources inside the gas field are often huge. A large amount of fragments has a negative impact on the purity of the output.

[0003] The patent with the announcement number CN117248849B on the China Patent Network proposes a fracturing gas wellhead, which cooperates with the filter plate, the transmission rod, the scraper, the collection box, the rotating plate, the rubber plate, the elastic telescopic rod, the moving rod, and the push plate to filter the impurities during gas extraction. At the same time, the rotation of the turntable drives the transmission rod to rotate, and the transmission rod drives the scraper to rotate. The scraper scrapes the impurities blocked at the bottom of the filter plate to prevent the impurities from adhering to the bottom of the filter plate. The impurities are removed by the knocking plate, the arc plate, the rope, the baffle cover, and the limit block. In coordinated operation, when the device leaks, in an emergency, the worker can use a tool to hit the knocking plate, at which time the knocking plate will push the arc plate to move, and the arc plate will push the limit block and break the limit block, the arc plate will no longer be limited by the limit block, and the shield will no longer be limited, the gas will blow the shield upward, and the arc plate will also be pulled by the shield through the rope to move, the arc plate will push the impurities inside the collection box out of the collection box, so that all the impurities are accumulated at the bottom of the filter plate, thereby blocking the gas and reducing the leakage of gas through the filter plate;

[0004] The above patent collects impurities inside the pipe body and filters natural gas by cooperating with the components of the collection mechanism and the filter plate. At the same time, when there is a leak at the gas wellhead, the limit block is broken to release the restrictions of the connecting components around the limit block, and the gas is blocked by impurities. However, after research by technicians in this field, it is found that there are still some disadvantages:

[0005] 1. The gas field has huge reserves, but the internal space of the pipe is limited. After a period of use, the filtered impurities cannot be discharged from the gas wellhead, which will block the pipe body and the wellbore, affecting the natural gas collection efficiency and even causing blockage. If the impurities are to be cleaned, the gas wellhead and other connected equipment need to be dismantled, which is time-consuming, labor-intensive, and costly.

[0006] 2. When a leak occurs, due to the breakage of the limit block, the entire gas wellhead and connecting equipment need to be dismantled during the repair process, and then the internal parts need to be replaced, further increasing the cost;

[0007] 3. The driving source for cleaning the filter plate at the gas wellhead is the rotational power generated by the extracted natural gas rotating through the inclined plate. In order to extract natural gas efficiently, the negative pressure used for extracting natural gas is relatively large, and the large negative pressure will drive the inclined plate to rotate too fast, eventually causing the scraper to scrape the filter plate at a high frequency, which will sharply reduce the service life of the scraper;

[0008] 4. When natural gas leaks, it is difficult for the staff to reach the scene and trigger the device in the first time, which will cause a large amount of natural gas leakage and waste. At the same time, when the hammer is used to knock the knocking plate, high temperature and sparks will be generated, which poses a great safety hazard.

[0009] To this end, we propose a fracturing gas production wellhead device that can automatically detect and warn, and perform preliminary processing at the same time. Summary of the invention

[0010] In order to solve the above technical problems, the present invention provides a fracturing gas production wellhead device capable of automatic detection and early warning, comprising a four-way body and further comprising:

[0011] A detection component, the detection component includes a fixing seat installed inside the four-way body, the fixing seat is installed with a first pressure sensor and a flow sensor, the data detected by the detection component is integrated into the central control system, and when an abnormality is detected, an early warning signal is triggered;

[0012] A filter screen, the filter screen is fixed in the spool and is arranged in an inclined manner;

[0013] A cleaning mechanism, which is installed inside the quadrilateral and in contact with the filter screen. The cleaning mechanism separates the debris on the filter screen from the filter screen. During the continuous separation process, the negative pressure used to extract the natural gas drives the debris to move upward along the inclined filter screen and finally locate at the highest point at the bottom of the filter screen;

[0014] A guiding mechanism, which is installed in the spool body and changes the flow direction of the gas in the spool body. After the gas flow is guided, the flow rate of the gas flow passing through the upper part of the filter screen is reduced;

[0015] A collecting mechanism, which is mounted on the quadrilateral and connected to the guiding mechanism, and collects the crushed materials;

[0016] A blocking mechanism is installed inside the four-way body and is connected to the cleaning mechanism and the detection component. The blocking mechanism stores part of the kinetic energy of the cleaning mechanism when it is working. When the detection component detects an abnormality, the blocking mechanism chooses to block the four-way body and release the stored kinetic energy as a driving source to block the four-way body according to the opening and closing states of the equipment.

[0017] In some embodiments, the cleaning mechanism includes a first support frame fixed in a four-way body, a first rotating shaft is installed through the first support frame, a fan blade is sleeved on the top end of the first rotating shaft, a second support frame is fixed in the four-way body, an inclined groove is opened on the second support frame, a bearing is installed through the inclined groove, a first universal joint is installed at the other end of the first rotating shaft, a second rotating shaft is installed at the other end of the first universal joint, a second universal joint is installed at the other end of the second rotating shaft, a third rotating shaft is installed at the other end of the second universal joint, the third rotating shaft passes through the bearing, and a scraper is sleeved on the top end of the third rotating shaft.

[0018] In some embodiments, the guiding mechanism includes a first curved plate fixed in the four-way body, the first curved plate is inclined and located directly above the highest point of the filter screen, a guide block is fixedly installed in the four-way body, the side of the guide block facing the axis of the longitudinal channel of the four-way body is wedge-shaped, and the top is an inclined surface, the inclination direction of the first curved plate is the same as the inclined surface at the top of the guide block, and is opposite to the inclination direction of the filter screen.

[0019] In some embodiments, the collecting mechanism includes a first slide groove opened on the four-way body, the first slide groove is inclined and is located between the guide block and the filter screen, the bottom surface of the first slide groove corresponds to the top surface of the guide block, and a guide cover is installed on the four-way body. The guide cover can be divided into three sections. The first section covers the first slide groove, the tail section is tubular, and the middle section is conical. The tail section of the guide cover is connected to a sealing connector, and a collecting bottle is installed at the other end of the sealing connector. Argon is stored in the collecting bottle. An electric control valve is arranged on the tail section of the guide cover, and the electric control valve is electrically connected to each sensor of the detection component.

[0020] In some embodiments, the blocking mechanism is divided into four parts, namely a transmission member, a linkage member, a switching member and a blocking member. The transmission member includes a first gear sleeved on a first rotating shaft, a fourth rotating shaft is installed on the first support frame, a second gear and a third gear are installed through the fourth rotating shaft, the second gear is meshed with the first gear, and its diameter is larger than the first gear and the third gear, a fifth rotating shaft is installed on the first support frame, a fourth gear is sleeved on the fifth rotating shaft, the fourth gear is meshed with the third gear, and its diameter is larger than the third gear.

[0021] In some embodiments, the linkage includes a cam sleeved on a fifth rotating shaft, a fixed block is installed on the first support frame, a push rod is installed through the fixed block, the push rod and the fixed block are slidably connected, a second arc plate is fixed to one end of the push rod, the second arc plate is fitted with the cam, a third ring is sleeved on the push rod, a spring is sleeved on the push rod, one end of the spring is fixed to the third ring, and the other end is fixed to the fixed block, a first piston is installed on the other end of the push rod, a sleeve is installed on the first support frame, the first piston is located inside the sleeve, a first one-way valve is provided on the sleeve, a second one-way valve is provided at one end of the sleeve, a pressure cylinder is installed in the four-way body, and the pressure cylinder is connected to one end of the sleeve.

[0022] In some embodiments, the switching member includes a turbine sleeved on a fifth rotating shaft, an outer cover sleeved on the fifth rotating shaft, the outer cover wraps the turbine, a first conduit is conductively connected to the outer cover, the other end of the first conduit is communicated with a pressure cylinder, a second conduit is penetrated and installed on the first conduit, the second conduit and the first conduit are communicated with each other, a pressure valve is arranged in the first conduit, the pressure valve is located between the second conduit and the pressure cylinder, a third conduit is conductively installed on the first conduit, both ends of the third conduit are communicated with the first conduit, one end of which is located between the pressure valve and the pressure cylinder, and the other end is located between the second conduit and the outer cover, a conductive cover is arranged in the middle part of the third conduit, a circular block is arranged in the conductive cover, the circular block is fitted with the inner wall of the conductive cover, a straight-line air hole is provided on the circular block, a sixth rotating shaft is fixed on the circular block, the sixth rotating shaft penetrates the conductive cover, a round wheel is fixed on the other end of the sixth rotating shaft, and a plurality of tooth grooves are provided on the round wheel;

[0023] It also includes a cylinder mounted on the quadrilateral, a linkage plate mounted on the top of the cylinder, a pull rod mounted on the linkage plate, the pull rod passes through the second conduit, and a second piston is mounted on the top of the pull rod, a third piston is sleeved on the pull rod, the distance between the second piston and the third piston is equal to the length of the second conduit, and a plurality of convex teeth are arranged on the pull rod, and the convex teeth correspond to the tooth grooves on the round wheel;

[0024] The quadrilateral body is provided with a fourth slide groove, a second slide block is installed in the fourth slide groove, a telescopic rod is installed on the second slide block, a T-shaped plate is installed on the linkage plate, and the T-shaped plate is located below the telescopic rod.

[0025] In some embodiments, the blocking member includes a second slide groove provided on the third rotating shaft, a first ring is sleeved on the second slide groove, the other end of the telescopic rod is fixed to the first ring, a support rod is installed on the first ring, a second ring is installed on the other end of the support rod, a third slide groove is provided on the second ring, a fan-shaped baffle is installed on the third slide groove, one end of the fan-shaped baffle is fixed to the third slide groove, and the other end is fixed with a first slider, the first slider corresponds to the third slide groove, a connecting plate is fixed on the first slider, and the fan-shaped baffle can be folded.

[0026] In some embodiments, a second pressure sensor is installed at the bottom end of the collecting bottle, and a support plate is installed on the second pressure sensor.

[0027] In some embodiments, a plurality of rollers are disposed on the second curved plate.

[0028] The present invention has at least the following beneficial effects:

[0029] 1. Under the action of the inclined filter and cleaning mechanism, the broken materials gradually gather at the highest point of the bottom of the filter to avoid affecting the purity of natural gas. Then, under the action of the guiding mechanism and the collecting mechanism, the broken materials automatically fall into the collecting bottle. When the broken materials reach a certain weight, the second pressure sensor reminds the staff to clean up the broken materials in time.

[0030] 2. Since the collection bottle contains argon, which is highly safe and has a much higher density than natural gas, it ensures that only the broken materials fall into the bottom of the collection bottle. Under the action of the guide mechanism, the gas flow in the collection mechanism is small and the pressure is low, which can effectively prevent natural gas leakage while cleaning the broken materials;

[0031] 3. Under the action of the blocking mechanism, the cleaning speed of the scraper on the filter is greatly reduced, extending the service life of the scraper. At the same time, part of the power consumed by the cleaning mechanism will be converted into air pressure for storage. When natural gas leaks in normal working conditions and is detected by the detection component, the blocking mechanism blocks the filter, greatly reducing the leakage. Even if a leak occurs when no gas is produced, this part of the stored power is released to still block the filter. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0033] Figure 2 It is a schematic diagram of the cross-sectional structure of the present invention;

[0034] Figure 3 For the present invention Figure 2 Schematic diagram of the structure at A in the middle;

[0035] Figure 4 It is a schematic diagram of the airflow direction under the guiding mechanism of the present invention;

[0036] Figure 5 It is a schematic diagram of the cleaning mechanism structure of the present invention;

[0037] Figure 6 For the present invention Figure 5 Schematic diagram of the structure at B in the middle;

[0038] Figure 7 Another cross-sectional structural schematic diagram of the present invention;

[0039] Figure 8 For the present invention Figure 7 Schematic diagram of the structure at C in the middle;

[0040] Fig. 9 For the present invention Figure 7 Schematic diagram of the structure at D in the middle;

[0041] Fig.10 For the present invention Fig. 9 Schematic diagram of the structure at E in the middle;

[0042] Fig.11 It is a partial bottom view structural schematic diagram of the present invention;

[0043] Fig.12 It is a schematic diagram of the local structure of the plugging member of the present invention;

[0044] Fig.13 For the present invention Fig.12 Schematic diagram of the structure at F in the middle;

[0045] Fig.14 It is a schematic diagram of the cross-sectional structure of the guide cover of the present invention.

[0046] In the figure: 1, quadrilateral; 2, detection assembly; 21, fixing seat; 22, first pressure sensor; 24, flow sensor; 3, filter screen; 4, cleaning mechanism; 41, first support frame; 42, first rotating shaft; 43, fan blade; 44, second support frame; 45, chute; 46, bearing; 47, first universal joint; 48, second rotating shaft; 49, second universal joint; 410, third rotating shaft; 411, scraper; 5, guide mechanism; 51, first arc plate; 52, guide block; 6, collector Mechanism; 61, first slide; 62, guide cover; 63, sealing connector; 64, collecting bottle; 65, electric control valve; 7, blocking mechanism; 71, transmission member; 711, first gear; 712, fourth shaft; 713, second gear; 714, third gear; 715, fifth shaft; 716, fourth gear; 72, linkage; 721, cam; 722, fixed block; 723, push rod; 724, second arc plate; 725, third ring; 726, spring; 727, first a piston; 728, sleeve; 729, first one-way valve; 7210, second one-way valve; 7211, pressure cylinder; 73, switching member; 731, turbine; 732, outer cover; 733, first conduit; 734, second conduit; 735, pressure valve; 736, third conduit; 737, guide cover; 738, round block; 739, straight air hole; 7310, sixth rotating shaft; 7311, round wheel; 7312, tooth groove; 7313, cylinder; 7314, linkage plate; 7315 , pull rod; 7316, second piston; 7317, third piston; 7318, fourth slide groove; 7319, second slider; 7320, telescopic rod; 7321, T-shaped plate; 7322, convex teeth; 74, blocking member; 741, second slide groove; 742, first ring; 743, support rod; 744, second ring; 745, third slide groove; 746, fan-shaped baffle; 747, first slider; 748, connecting plate; 81, second pressure sensor; 82, support plate; 9, roller. DETAILED DESCRIPTION

[0047] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0048] Example 1

[0049] See also Figure 1-14 The present invention provides a technical solution: a fracturing gas production wellhead device capable of automatic detection and early warning, comprising a four-way body 1, and also comprising:

[0050] The detection component 2 includes a fixing seat 21 installed inside the quadrilateral 1, and a first pressure sensor 22 and a flow sensor 24 are installed on the fixing seat 21. The data detected by the detection component 2 is integrated into the central control system, and an early warning signal is triggered when an abnormality is detected;

[0051] The first pressure sensor 22 and the flow sensor 24 are both existing technologies. The early warning principle of this part is: the data of the above sensors are integrated into the central control system. Once an abnormality is detected, such as a sudden drop in pressure, abnormal flow, etc., an early warning signal is immediately triggered, and the operator is reminded by sound and light alarms, SMS notifications, etc.;

[0052] The filter screen 3 is fixed in the quadrilateral body 1 and is arranged in an inclined manner;

[0053] The cleaning mechanism 4 is installed inside the quadrilateral 1 and contacts the filter 3. The cleaning mechanism 4 separates the broken materials on the filter 3 from the filter 3. During the continuous separation process, the negative pressure used to extract the natural gas drives the broken materials to move upward along the inclined filter 3 and finally be located at the highest point at the bottom of the filter 3.

[0054] The guiding mechanism 5 is installed in the quadruple body 1. The guiding mechanism 5 changes the flow direction of the gas in the quadruple body 1. After the airflow is guided, the flow rate of the airflow passing through the upper part of the filter screen 3 is reduced;

[0055] A collecting mechanism 6, which is mounted on the quadrilateral 1 and connected to the guiding mechanism 5, and collects the crushed materials;

[0056] The blocking mechanism 7 is installed inside the four-way body 1 and is connected to the cleaning mechanism 4 and the detection component 2. The blocking mechanism 7 stores part of the kinetic energy of the cleaning mechanism 4 when it is working. When the detection component 2 detects an abnormality, the blocking mechanism 7 chooses to block the four-way body 1 and release the stored kinetic energy as a driving source to block the four-way body 1 according to the opening and closing states of the equipment.

[0057] The cleaning mechanism 4 includes a first support frame 41 fixed in the quadrilateral body 1, a first rotating shaft 42 is installed through the first support frame 41, a fan blade 43 is sleeved on the top end of the first rotating shaft 42, a second support frame 44 is fixed in the quadrilateral body 1, an inclined groove 45 is opened on the second support frame 44, a bearing 46 is installed through the inclined groove 45, a first universal joint 47 is installed at the other end of the first rotating shaft 42, a second rotating shaft 48 is installed at the other end of the first universal joint 47, a second universal joint 49 is installed at the other end of the second rotating shaft 48, a third rotating shaft 410 is installed at the other end of the second universal joint 49, the third rotating shaft 410 passes through the bearing 46, and a scraper 411 is sleeved on the top end of the third rotating shaft 410.

[0058] like Figure 5 , 6 As shown, in daily gas production work, when natural gas passes through the fan blades 43, the fan blades 43 are driven to rotate, and the fan blades 43 drive the first rotating shaft 42 to rotate. The first rotating shaft 42 drives the scraper 411 to rotate through the first universal joint 47, the second rotating shaft 48, the second universal joint 49, and the third rotating shaft 410. The scraper 411 cleans the debris on the filter screen 3. Since the filter screen 3 is inclined and has an elliptical shape as a whole, the radius of the rotation range of the scraper 411 is the same as the short diameter of the filter screen 3, that is, the top of the long diameter of the filter screen 3 is in an unscraped state, and the debris in this part will not be affected by the scraper 411. Under the guidance of the airflow and the inclined surface, the debris is finally located at the highest point of the bottom surface of the inclined filter screen 3.

[0059] The guiding mechanism 5 comprises a first curved plate 51 fixed in the quadrilateral body 1. The first curved plate 51 is inclined and is located directly above the highest point of the filter screen 3. A guiding block 52 is fixedly installed in the quadrilateral body 1. The side of the guiding block 52 facing the axis of the longitudinal channel of the quadrilateral body 1 is wedge-shaped, and the top end is an inclined surface. The inclination direction of the first curved plate 51 is the same as the inclined surface at the top end of the guiding block 52, and is opposite to the inclination direction of the filter screen 3.

[0060] Figure 4 The figure shows the direction of the airflow passing through the guide mechanism 5. Due to the guidance of the wedge-shaped surface of the guide block 52, the airflow will bypass the top part of the filter screen 3. The debris has been concentrated at the highest point of the filter screen 3 under the action of the cleaning mechanism 4. At this time, it loses the support of the bottom airflow and automatically falls to the top surface of the guide block 52 under the action of gravity.

[0061] The collecting mechanism 6 includes a first slide groove 61 opened on the four-way body 1. The first slide groove 61 is inclined and is located between the guide block 52 and the filter screen 3. The bottom surface of the first slide groove 61 corresponds to the top surface of the guide block 52. A guide cover 62 is installed on the four-way body 1. The guide cover 62 can be divided into three sections. The first section covers the first slide groove 61, the tail section is tubular, and the middle section is conical. The tail section of the guide cover 62 is connected to a sealing connector 63. A collecting bottle 64 is installed at the other end of the sealing connector 63. Argon is stored in the collecting bottle 64. An electric control valve 65 is arranged on the tail section of the guide cover 62. The electric control valve 65 is electrically connected to each sensor of the detection component 2.

[0062] like Figure 5As shown, the top surface of the guide block 52 is inclined. With the accumulation of the crushed materials, the crushed materials eventually fall into the collection bottle 64 through the first chute 61 and the guide cover 62. Since the collection bottle 64 stores argon gas, which has stable chemical properties, high density, low heat capacity and thermal conductivity, low ionization potential, and is easy to purchase in the market, safety is ensured. The density of the crushed materials is much greater than that of argon gas, and the density of argon gas is greater than that of natural gas. The density difference between the three is large. The crushed materials entering the collection bottle 64 and the natural gas adhered to the crushed materials are separated. When the crushed materials need to be cleaned, the natural gas leakage is prevented when the crushed materials are taken out, and the electric control valve 65 is closed to cut off the communication between the collection bottle 64 and the guide cover 62. Then the collection bottle 64 is removed, and the crushed materials inside the collection bottle 64 are cleaned and then reinstalled and the electric control valve 65 is opened.

[0063] It should be noted that gas extraction is generally divided into three stages. In the early stage of extraction, the underground pressure is sufficient and natural gas can be directly extracted. In the middle stage of extraction, the underground pressure is reduced and the extraction efficiency is ensured in cooperation with the negative pressure system. In the late stage of extraction, natural gas is extracted almost entirely by negative pressure. When the negative pressure may affect part of the argon gas in the collection bottle 64 (for example, if the negative pressure is too large and part of the argon gas is extracted), the staff can perform the following operations according to the actual situation of the gas well:

[0064] When collecting gas from a gas well, the electric control valve 65 is closed. In this state, debris and impurities will accumulate in the guide cover 62. The staff only needs to open the electric control valve 65 at regular intervals according to the output flow of the gas well when the main valve is closed (negative pressure disappears). The debris in the guide cover 62 falls into the collection bottle 64 under the action of gravity, and then close the electric control valve 65 to clean the debris in the collection bottle 64.

[0065] The blocking mechanism 7 is divided into four parts, namely a transmission member 71, a linkage member 72, a switching member 73 and a blocking member 74. The transmission member 71 includes a first gear 711 sleeved on the first rotating shaft 42. A fourth rotating shaft 712 is installed on the first supporting frame 41. A second gear 713 and a third gear 714 are installed on the fourth rotating shaft 712. The second gear 713 meshes with the first gear 711, and its diameter is larger than the first gear 711 and the third gear 714. A fifth rotating shaft 715 is installed on one side of the fourth rotating shaft 712 on the first supporting frame 41. A fourth gear 716 is sleeved on the fifth rotating shaft 715. The fourth gear 716 meshes with the third gear 714, and its diameter is larger than the third gear 714.

[0066] During the rotation of the first shaft 42, the first gear 711 is driven to rotate, and the first gear 711 drives the fourth gear 716 to rotate through the second gear 713, the fourth shaft 712, and the third gear 714. This process is the same as the working principle of the gear reducer. The power source of this part of the movement comes from the power of the natural gas flow to drive the fan blades 43 to rotate, which preliminarily reduces the rotation speed of the first shaft 42.

[0067] The linkage 72 includes a cam 721 sleeved on the fifth rotating shaft 715, a fixing block 722 is installed on the first support frame 41, a push rod 723 is installed through the fixing block 722, the push rod 723 and the fixing block 722 are slidably connected, a second arc plate 724 is fixed to one end of the push rod 723, a third ring 725 is sleeved on the push rod 723, a spring 726 is sleeved on the push rod 723, and the second arc plate 724 is fitted with the cam 721 through the spring 726. One end of the spring 726 is fixed to the third ring 725, and the other end is fixed to the fixed block 722. The other end of the push rod 723 is installed with a first piston 727, a sleeve 728 is installed on the first support frame 41, the first piston 727 is located inside the sleeve 728, a first one-way valve 729 is provided on the sleeve 728, a second one-way valve 7210 is provided at one end of the sleeve 728, a pressure cylinder 7211 is installed in the four-way body 1, and the pressure cylinder 7211 is connected to one end of the sleeve 728.

[0068] The fourth gear 716 drives the fifth rotating shaft 715 to rotate, and the fifth rotating shaft 715 drives the cam 721 to rotate. During the rotation of the cam 721, the second arc plate 724 is squeezed, and the second arc plate 724 compresses the spring 726 through the third ring 725, and pushes the push rod 723 to move a short distance. When the short diameter of the cam 721 is located on one side of the second arc plate 724, the spring 726 drives the second arc plate 724 and the push rod 723 to reset, that is, each time the first rotating shaft 42 rotates one circle, the push rod 723 moves a short distance, the first one-way valve 729 limits the natural gas to enter the sleeve 728 only through itself, and the second one-way valve 7210 limits the sleeve 728 The natural gas inside can only be discharged from itself and enter the pressure cylinder 7211, that is, only a small part of the air pressure enters the pressure cylinder 7211 every time the first rotating shaft 42 rotates one circle. While reducing the rotation speed of the first rotating shaft 42, it prevents the first rotating shaft 42 from being unable to rotate due to excessive resistance, and at the same time continuously increases the pressure in the pressure cylinder 7211. This part performs a secondary reduction on the rotation speed of the first rotating shaft 42. Since the rotation speed of the first rotating shaft 42 directly affects the frequency with which the scraper 411 scrapes the filter 3, after the rotation speed of the first rotating shaft 42 is reduced multiple times, the scraping frequency of the scraper 411 can be reduced, thereby achieving the goal of cleaning the filter 3 while reducing the degree of wear of the scraper 411 and the filter 3.

[0069] The switching member 73 includes a turbine 731 sleeved on the fifth rotating shaft 715, an outer cover 732 sleeved on the fifth rotating shaft 715, the outer cover 732 wraps the turbine 731, a first conduit 733 is connected to the outer cover 732, the other end of the first conduit 733 is connected to the pressure cylinder 7211, a second conduit 734 is installed through the first conduit 733, the second conduit 734 and the first conduit 733 are connected to each other, a pressure valve 735 is arranged in the first conduit 733, the pressure valve 735 is located between the second conduit 734 and the pressure cylinder 7211, a third conduit 736 is installed on the first conduit 733, and the third conduit 736 Both ends are connected to the first conduit 733, one end of which is located between the pressure valve 735 and the pressure cylinder 7211, and the other end is located between the second conduit 734 and the outer cover 732. A conductive cover 737 is provided in the middle of the third conduit 736, and a circular block 738 is provided in the conductive cover 737. The circular block 738 is fitted with the inner wall of the conductive cover 737, and a straight air hole 739 is provided on the circular block 738. A sixth rotating shaft 7310 is fixed on the circular block 738, and the sixth rotating shaft 7310 penetrates the conductive cover 737. A round wheel 7311 is fixed on the other end of the sixth rotating shaft 7310, and a plurality of tooth grooves 7312 are provided on the round wheel 7311;

[0070] It also includes a cylinder 7313 installed on the quadrilateral 1, the cylinder 7313 is electrically connected to the detection component 2, a linkage plate 7314 is installed on the top of the cylinder 7313, a pull rod 7315 is installed on the linkage plate 7314, the pull rod 7315 penetrates the second conduit 734, and a second piston 7316 is installed on the top, a third piston 7317 is sleeved on the pull rod 7315, the distance between the second piston 7316 and the third piston 7317 is equal to the length of the second conduit 734, and a plurality of convex teeth 7322 are provided on the pull rod 7315, and the convex teeth 7322 correspond to the tooth grooves 7312 on the round wheel 7311;

[0071] In the default state, the straight air hole 739 on the circular block 738 is perpendicular to the first conduit 733, that is, the middle part of the third conduit 736 is in a blocked state. In this state, when the pressure in the pressure cylinder 7211 reaches a certain value, the excess pressure first enters the first conduit 733, and then is discharged from the second conduit 734 through the pressure valve 735, ensuring that there is always a certain pressure in the pressure valve 735, and when the fifth shaft 715 drives the turbine 731 to rotate, the air flow generated by the turbine 731 also passes through the first conduit 733 and is discharged from the second conduit 734. When the gas collection work is not carried out and the detection component 2 detects an abnormality, the cylinder 7313 is opened, driving the linkage plate 7314 to rise. During the rising process of the linkage plate 7314, the pull rod 7315 is driven to move upward. During the upward movement of the pull rod 7315, the second piston 7316 and the third piston 7317 rise synchronously, and at the same time, the convex tooth 7322 passes through the tooth groove on the round wheel 7311 7312 drives the round wheel 7311 to rotate. When the cylinder 7313 stops working, the round wheel 7311 just rotates 90°, and synchronously drives the circular block 738 to rotate 90° through the sixth rotating shaft 7310. At this time, the straight-line air hole 739 on the circular block 738 releases the blockage of the third conduit 736, and the third conduit 736 is connected to both sides of the first conduit 733, and the second piston 7316 and the third piston 7317 just block the two ends of the second conduit 734. At this time, the pressure of the pressure cylinder 7211 will pass through the front part of the first conduit 733, and after being blocked by the pressure valve 735, it will enter the rear part of the first conduit 733 through the third conduit 736, and finally spray into the outer cover 732 from the first conduit 733, driving the turbine 731 to rotate, and then discharged from the other end of the outer cover 732. During the rotation of the turbine 731, the fourth gear 716 is driven to rotate through the fifth rotating shaft 715, and finally the first rotating shaft 42 is driven to rotate.

[0072] A fourth slide groove 7318 is provided on the quadrilateral 1 , a second slider 7319 is installed in the fourth slide groove 7318 , a telescopic rod 7320 is installed on the second slider 7319 , a T-shaped plate 7321 is provided above the linkage plate 7314 , and the T-shaped plate 7321 is located below the telescopic rod 7320 .

[0073] When the linkage plate 7314 rises, the T-shaped plate 7321 is driven to rise synchronously. During the rising process of the T-shaped plate 7321, the second sliding block 7319 is driven to move in the fourth sliding groove 7318 through the telescopic rod 7320.

[0074] like Figure 6 , 13As shown, the blocking member 74 includes a second slide groove 741 provided on the third rotating shaft 410, the second slide groove 741 is sleeved with a first ring 742, the telescopic rod 7320 is fixed to the first ring 742 at one end away from the fourth slide groove 7318, a support rod 743 is installed on the first ring 742, the other end of the support rod 743 is installed with a second ring 744, a third slide groove 745 is provided on the second ring 744, the third slide groove 745 is installed with a fan-shaped baffle 746, one end of the fan-shaped baffle 746 is fixed to the third slide groove 745, and the other end is fixed with a first slider 747, the first slider 747 is slidably connected to the third slide groove 745, a connecting plate 748 is fixed on the first slider 747, and the fan-shaped baffle 746 can be folded.

[0075] As the telescopic rod 7320 rises, the second ring 744 is driven to rise through the first ring 742 and the support rod 743. Fig.12 As shown, one side of the fan-shaped baffle 746 is higher, and the second ring 744 rises to drive the higher side of the fan-shaped baffle 746 to fit the filter screen 3. At this time, under the action of the switching member 73, the first rotating shaft 42 rotates, and drives the scraper 411 to rotate under the action of the cleaning mechanism 4. During the rotation of the scraper 411, it contacts one side of the fan-shaped baffle 746 and drives the fan-shaped baffle 746 to expand in a circular shape in the third slide groove 745, thereby blocking the filter screen 3 and significantly reducing the natural gas leakage rate.

[0076] like Fig. 9 As shown, when the gas production work is operating normally, the rotation direction of the turbine 731 in the switching member 73 is forward. When the detection component 2 detects an abnormality, the turbine 731 rotates in the opposite direction under the influence of the airflow in the pressure cylinder 7211, that is, reverse rotation. That is, when a leakage occurs, under the influence of the switching member 73, the connecting member 72, and the transmission member 71, the first rotating shaft 42 rotates in the opposite direction to drive the blocking member 74 to block the filter screen 3. When the leakage problem is solved, the equipment is opened normally. Under the strong negative pressure and the pressure of the natural gas downhole, the fan blades 43 are driven to rotate and synchronously drive the first rotating shaft 42 to rotate forward. At this time, after the first rotating shaft 42 rotates and is transmitted, the scraper 411 is synchronously driven to drive the fan-shaped baffle 746 to completely reset, and at the same time, the cylinder 7313 drives other components to reset synchronously.

[0077] The working process is as follows: under normal gas extraction operation, the cleaning mechanism 4 cleans the debris and impurities on the filter screen 3, and the debris and impurities fall into the collecting mechanism 6 under the action of the guiding mechanism 5. During the operation of the cleaning mechanism 4, the blocking mechanism 7 slows down the operation frequency of the cleaning mechanism 4 and injects pressure into the pressure cylinder 7211;

[0078] When the detection component 2 detects an abnormality, such as a sudden drop in pressure or abnormal flow, the pressure stored in the pressure cylinder 7211 in the sealing mechanism 7 is released, driving the components in the cleaning mechanism 4 to operate in reverse, during which the fan-shaped baffle 746 is driven to seal the filter 3 to slow down the natural gas leakage rate. After the leakage problem is solved, the device is opened normally, the sealing mechanism 7 is automatically reset, and other components work in the same way.

[0079] Example 2

[0080] See also Figure 5 , Fig.11 Based on Example 1, the present invention further optimizes this solution:

[0081] A second pressure sensor 81 is installed at the bottom end of the collecting bottle 64 , and a support plate 82 is installed on the second pressure sensor 81 .

[0082] When the debris in the collection bottle 64 reaches a certain weight, the weight of the debris itself presses the support plate 82, triggering the second pressure sensor 81. The second pressure sensor 81 is electrically connected to the central control system. The staff receives the signal and cleans the debris in the collection bottle 64.

[0083] A plurality of rollers 9 are disposed on the second arc-shaped plate 724 .

[0084] The roller 9 can significantly reduce the friction between the cam 721 and the second arc plate 724, thereby extending the service life of the device.

[0085] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0086] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A fracturing gas production wellhead device capable of automatic detection and early warning, comprising a spool (1), characterized in that: Also includes: A detection component (2), the detection component (2) comprising a fixing seat (21) mounted inside the quadrilateral (1), a first pressure sensor (22) and a flow sensor (24) being mounted on the fixing seat (21), the data detected by the detection component (2) being integrated into a central control system, and a warning signal being triggered when an abnormality is detected; A filter screen (3), the filter screen (3) being fixed in the quadrilateral (1) and arranged in an inclined manner; A cleaning mechanism (4), the cleaning mechanism (4) being installed inside the four-way body (1) and in contact with the filter screen (3), the cleaning mechanism (4) separating the crushed material on the filter screen (3) from the filter screen (3), and during the continuous separation process, the negative pressure used to extract the natural gas drives the crushed material to move upward along the inclined filter screen (3) and finally be located at the highest point at the bottom of the filter screen (3); A guiding mechanism (5), the guiding mechanism (5) being installed in the quadrilateral body (1), the guiding mechanism (5) changing the flow direction of the gas in the quadrilateral body (1), so that after the gas flow is guided, the flow rate passing through the upper part of the filter screen (3) is reduced; A collecting mechanism (6), the collecting mechanism (6) being mounted on the quadrilateral (1) and connected to the guiding mechanism (5), the collecting mechanism (6) collecting the crushed material; A blocking mechanism (7), the blocking mechanism (7) being installed inside the quadrilateral (1) and connected to the cleaning mechanism (4) and the detection component (2), the blocking mechanism (7) storing part of the kinetic energy of the cleaning mechanism (4) when it is working, and when the detection component (2) detects an abnormality, the blocking mechanism (7) selects to block the quadrilateral (1) and release the stored kinetic energy as a driving source to block the quadrilateral (1) according to the opening and closing states of the device; The cleaning mechanism (4) comprises a first support frame (41) fixed in the quadrilateral body (1), a first rotating shaft (42) being installed through the first support frame (41), a fan blade (43) being sleeved on the top end of the first rotating shaft (42), a second support frame (44) being fixed in the quadrilateral body (1), an inclined groove (45) being provided on the second support frame (44), a bearing (46) being installed through the inclined groove (45), a first universal joint (47) being installed at the other end of the first rotating shaft (42), a second rotating shaft (48) being installed at the other end of the first universal joint (47), a second universal joint (49) being installed at the other end of the second rotating shaft (48), a third rotating shaft (410) being installed at the other end of the second universal joint (49), the third rotating shaft (410) being inserted through the bearing (46), and a scraper (411) being sleeved on the top end of the third rotating shaft (410); The blocking mechanism (7) is composed of four parts, namely a transmission member (71), a linkage member (72), a switching member (73) and a blocking member (74); the transmission member (71) comprises a first gear (711) sleeved on a first rotating shaft (42); a fourth rotating shaft (712) is mounted on the first support frame (41); a second gear (713) and a third gear (714) are installed through the fourth rotating shaft (712); the second gear (713) meshes with the first gear (711) and has a diameter greater than the first gear (711) and the third gear (714); a fifth rotating shaft (715) is mounted on the first support frame (41); a fourth gear (716) is sleeved on the fifth rotating shaft (715); the fourth gear (716) meshes with the third gear (714) and has a diameter greater than the third gear (714); The linkage (72) comprises a cam (721) sleeved on the fifth rotating shaft (715); a fixing block (722) is mounted on the first supporting frame (41); a push rod (723) is installed through the fixing block (722); the push rod (723) and the fixing block (722) are slidably connected; a second arc plate (724) is fixed to one end of the push rod (723); the second arc plate (724) is fitted with the cam (721); a third ring (725) is sleeved on the push rod (723); a spring (726) is sleeved on the push rod (723); the spring (726) is sleeved on the push rod (723); One end of the spring (726) is fixed to the third sleeve ring (725), and the other end is fixed to the fixed block (722); the other end of the push rod (723) is mounted with a first piston (727); the first support frame (41) is mounted with a sleeve (728); the first piston (727) is located inside the sleeve (728); the sleeve (728) is provided with a first one-way valve (729); one end of the sleeve (728) is provided with a second one-way valve (7210); a pressure cylinder (7211) is mounted inside the four-way body (1); the pressure cylinder (7211) is communicated with one end of the sleeve (728); The switching member (73) comprises a turbine (731) sleeved on a fifth rotating shaft (715); an outer cover (732) is sleeved on the fifth rotating shaft (715); the outer cover (732) wraps the turbine (731); a first conduit (733) is conductively connected to the outer cover (732); the other end of the first conduit (733) is in communication with the pressure cylinder (7211); a second conduit (734) is installed through the first conduit (733); the second conduit (734) and the first conduit (733) are in communication with each other; a pressure valve (735) is provided in the first conduit (733); the pressure valve (735) is located between the second conduit (734) and the pressure cylinder (7211); a third conduit (736) is conductively installed on the first conduit (733); both ends of the third conduit (736) are in communication with the pressure cylinder (7211); The first conduit (733) is connected, one end of which is located between the pressure valve (735) and the pressure cylinder (7211), and the other end is located between the second conduit (734) and the outer cover (732); a conductive cover (737) is provided in the middle part of the third conduit (736); a circular block (738) is provided inside the conductive cover (737); the circular block (738) is fitted with the inner wall of the conductive cover (737); a straight-shaped air hole (739) is provided on the circular block (738); a sixth rotating shaft (7310) is fixed on the circular block (738); the sixth rotating shaft (7310) passes through the conductive cover (737); a round wheel (7311) is fixed on the other end of the sixth rotating shaft (7310); a tooth groove (7312) is provided on the round wheel (7311); a plurality of tooth grooves (7312) are provided in a circular array; It also includes a cylinder (7313) mounted on the four-way body (1), the cylinder (7313) being electrically connected to the detection component (2), a linkage plate (7314) being mounted on the top of the cylinder (7313), a pull rod (7315) being mounted on the linkage plate (7314), the pull rod (7315) penetrating the second conduit (734), and a second piston (7316) being mounted on the bottom of the pull rod (7315), a third piston (7317) being sleeved on the pull rod (7315), the distance between the second piston (7316) and the third piston (7317) being equal to the length of the second conduit (734), and a convex tooth (7322) being arranged on the pull rod (7315), the convex teeth (7322) being in a plurality and forming a linear array, and the convex teeth (7322) corresponding to the tooth grooves (7312) on the round wheel (7311); The quadrilateral body (1) is provided with a fourth slide groove (7318), a second slide block (7319) is installed in the fourth slide groove (7318), a telescopic rod (7320) is installed on the second slide block (7319), a T-shaped plate (7321) is installed on the linkage plate (7314), and the T-shaped plate (7321) is located below the telescopic rod (7320); The blocking member (74) includes a second slide groove (741) provided on the third rotating shaft (410), a first ring (742) being sleeved on the second slide groove (741), the other end of the telescopic rod (7320) being fixed to the first ring (742), a support rod (743) being mounted on the first ring (742), the other end of the support rod (743) being mounted on the second ring (744), a third slide groove (745) being provided on the second ring (744), a fan-shaped baffle (746) being mounted on the third slide groove (745), one end of the fan-shaped baffle (746) being fixed to the third slide groove (745), and the other end of the fan-shaped baffle (747) being fixed thereto, the first slide groove (747) being slidably connected to the third slide groove (745), a connecting plate (748) being fixed on the first slide groove (747), and the fan-shaped baffle (746) being of a foldable and retractable type.

2. A fracturing gas production wellhead device capable of automatic detection and early warning according to claim 1, characterized in that: The guide mechanism (5) comprises a first arc-shaped plate (51) fixed in the quadrilateral body (1); the first arc-shaped plate (51) is arranged in an inclined manner and is located directly above the highest point of the filter screen (3); a guide block (52) is fixedly installed in the quadrilateral body (1); a side of the guide block (52) facing the axis of the longitudinal channel of the quadrilateral body (1) is wedge-shaped, and the top end is an inclined surface; the inclination direction of the first arc-shaped plate (51) is the same as the inclined surface of the top end of the guide block (52), and is opposite to the inclination direction of the filter screen (3).

3. A fracturing gas production wellhead device capable of automatic detection and early warning according to claim 2, characterized in that: The collecting mechanism (6) comprises a first slide groove (61) provided on the four-way body (1). The first slide groove (61) is inclined and located between the guide block (52) and the filter screen (3). The bottom surface of the first slide groove (61) is flush with the top surface of the guide block (52). A guide cover (62) is installed on the four-way body (1). The guide cover (62) can be divided into three sections. The first section covers the first slide groove (61), the tail section is tubular, and the middle section is conical. The tail section of the guide cover (62) is connected to a sealing connector (63). The other end of the sealing connector (63) is installed with a collecting bottle (64). Argon gas is stored in the collecting bottle (64). An electric control valve (65) is arranged on the tail section of the guide cover (62). The electric control valve (65) is electrically connected to each sensor of the detection component (2).

4. A fracturing gas production wellhead device capable of automatic detection and early warning according to claim 3, characterized in that: A second pressure sensor (81) is installed at the bottom end of the collecting bottle (64), and a support plate (82) is installed on the second pressure sensor (81).

5. A fracturing gas production wellhead device capable of automatic detection and early warning according to claim 4, characterized in that: A roller (9) is provided on the second arc-shaped plate (724).

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