A dual discharge high pressure manifold for fracturing

Abstract

The application provides a double-discharge high-pressure manifold for fracturing, and relates to the technical field of petroleum equipment, which comprises two left and right split three-way valves, discharge flange assemblies are installed on the three-way valves, connecting pipes are installed on the sides of the three-way valves close to each other, pressure gauges and detection sampling devices are arranged on the connecting pipes, Y-shaped three-way pipes are also connected through the three-way valves, and the Y-shaped three-way pipes are connected with fracturing trucks. Through the arrangement of the pressure gauges, the pressure fluctuation in the manifold can be monitored in real time, and risks such as overpressure and sudden pressure change can be warned; through the arrangement of the detection sampling devices, fracturing fluid samples can be directly extracted from the connecting pipes without interrupting the operation of the manifold, the cumbersome operation of connecting detection pipes is avoided, the operation continuity is ensured, and the operation risk caused by external pipes in the high-pressure environment is reduced.

Description

Technical Field

[0001] This invention relates to the field of petroleum equipment technology, specifically to a dual-discharge high-pressure manifold for fracturing. Background Technology

[0002] High-pressure manifolds for fracturing are key pieces of equipment in oil and gas field fracturing operations. They are mainly used to transport high-pressure, high-flow-rate fracturing fluid, delivering proppant and chemical additives to the underground oil layer to form fractures and maintain their open state, thereby improving oil and gas recovery. These manifolds consist of high-strength steel pipes, elbows, tees, valves, quick couplings, and other components. They need to withstand ultra-high pressures exceeding 100 MPa. Therefore, high-quality alloy steel is often used in material selection, and they undergo rigorous forging, heat treatment, and non-destructive testing to ensure their strength and sealing performance.

[0003] For example, patent application CN 114856523 A discloses a dual-discharge high-pressure manifold for fracturing, including two three-way valve bodies. Discharge flange assemblies are mounted on the surface of each three-way valve body. A flow chamber seat is mounted on the side of the three-way valve body away from the discharge flange assembly. A connector pipe is connected to the end of the flow chamber seat. A fastening mechanism is provided between the connector pipe and the flow chamber seat. The fastening mechanism includes a concave sleeve movably fitted outside the connector pipe. A fixing rod is fixedly connected to the outer surface of the concave sleeve. The concave sleeve is threadedly connected to the flow chamber seat. The fastening mechanism also includes a fixing plate fixedly mounted on the outer surface of the connector pipe. A collar plate is provided on one side of the fixing plate. Several springs are installed between the collar plate and the fixing plate. The collar plate is slidably fitted with the connector pipe.

[0004] However, the aforementioned patent only uses a few flow meters to detect high-pressure manifolds, which is a relatively limited detection method. Relying solely on flow meters can only monitor the flow rate and total volume of fluid, but cannot detect pipeline pressure. When situations such as sealing failure at pipeline connections or leakage occur, it is difficult to provide early warning and take immediate action, posing a safety hazard. In addition, if it is necessary to detect the fracturing fluid in the manifold, the operation of the manifold must be interrupted, and a separate detection pipeline must be connected for sampling. The operation process is cumbersome and complex, which not only reduces operational efficiency but also increases the operational risks under high-pressure environments. Summary of the Invention

[0005] The present invention provides a dual-discharge high-pressure manifold for fracturing to solve at least one of the problems mentioned in the background art.

[0006] To solve the above-mentioned technical problems, the present invention discloses a dual-discharge high-pressure manifold for fracturing, comprising two three-way valves arranged on the left and right sides, each three-way valve having a discharge flange assembly installed on it, a connecting pipe installed on the side of the three-way valves that is close to each other, a pressure gauge and a detection and sampling device installed on the connecting pipe, and a Y-type tee connected through the three-way valves, the Y-type tee being connected to the fracturing truck.

[0007] Preferably, the detection sampling device includes a mounting box, which is fixedly mounted on the connecting pipe. A temporary storage box is provided inside the mounting box. A sampling tube is slidably installed through the mounting box and extends into the connecting pipe. The sampling tube is provided with a plurality of sampling heads one and a plurality of sampling heads two.

[0008] Preferably, a sampling hose is rotatably provided at the upper end of the sampling tube, and an installation block is provided on the temporary storage box. The sampling hose is fixedly installed on the temporary storage box by the installation block. Two of each of the plurality of sampling heads one and plurality of sampling heads two are provided, with the plurality of sampling heads one located above the plurality of sampling heads two.

[0009] Preferably, a connecting rod is fixedly installed inside the connecting tube, and a wedge-shaped drive box is fixedly installed at the lower end of the connecting rod. A horizontal plate is rotatably connected to the wedge-shaped drive box. The sampling tube slides through the horizontal plate, and several sampling heads are located on the upper side of the horizontal plate and several sampling heads are located on the lower side of the horizontal plate.

[0010] Preferably, a drive motor is fixedly installed inside the mounting box, a gear one is fixedly connected to the output end of the drive motor, a gear two is meshed on the gear one, a rotating rod is fixedly installed in the center of the gear two, a first pulley is fixedly installed at the upper end of the rotating rod, a second pulley is installed on the sampling tube, and belts are installed on the first pulley and the second pulley.

[0011] Preferably, a stepped ring is fixedly provided on the upper end of the second pulley, an annular toothed plate is fixedly provided on the stepped ring, a connecting key is provided in the second pulley and the stepped ring, a keyway is provided on the sampling tube, and the second pulley and the stepped ring are slidably connected to the sampling tube through the cooperation of the connecting key and the keyway.

[0012] The mounting box contains a rotating shaft with a rotating plate fixed on it. The rotating plate has several guide grooves. The rotating shaft extends backward out of the mounting box. A fan-shaped plate is fixed at the rear end of the rotating shaft, and an arc-shaped toothed plate is fixed at the lower end of the fan-shaped plate. The arc-shaped toothed plate meshes with the annular toothed plate. A partition plate is also fixed inside the mounting box, dividing the mounting box into a first chamber and a second chamber.

[0013] Preferably, a linear drive is fixedly installed on the rear inner wall of the mounting box, and an L-shaped connecting rod is fixedly connected to the lower output end of the linear drive. A collar is fixedly connected to the other end of the L-shaped connecting rod, and the collar is rotatably sleeved on the sampling tube.

[0014] Preferably, a bevel gear one is provided inside the wedge-shaped drive box, and a rotating rod slides downward into the wedge-shaped drive box. A bevel gear one is fixedly provided at the lower end of the rotating rod. A bevel gear two is meshed with the other end of the bevel gear one. A rotating rod is fixedly provided on the bevel gear two. The rotating rod rotates through the horizontal plate, and a semicircular plate one and a semicircular plate two are symmetrically arranged on the rotating rod.

[0015] Preferably, a mating ring is fixedly provided in the center of the semicircular plate, and a number of pawls are fixedly provided on the outer circular surface of the mating ring. The rotating rod is hollow, and a number of ratchet teeth are fixedly provided on the inner circular surface of the rotating rod. The ratchet teeth and the pawls engage with each other.

[0016] Preferably, a mating ring is fixedly provided in the center of the semicircular plate 2, and a number of pawls are fixedly provided on the inner circular surface of the mating ring 2. A number of ratchet teeth are fixedly provided on the outer circular surface of the rotating rod, and the number of ratchet teeth 2 cooperate with the number of pawls 1.

[0017] A number of through holes 1 are opened on a semicircular plate 1, and a number of through holes 2 are opened on a semicircular plate 2. When the semicircular plate 1 and the semicircular plate 2 overlap, the number of through holes 1 and the number of through holes 2 are distributed alternately.

[0018] Compared with the prior art, the present invention provides a dual-discharge high-pressure manifold for fracturing, which has the following advantages: by setting a pressure gauge, pressure fluctuations in the manifold can be monitored in real time, and risks such as overpressure and sudden pressure changes can be warned; and by setting a detection and sampling device, fracturing fluid samples can be extracted directly from the connecting pipe without interrupting the operation of the manifold, avoiding the cumbersome operation of connecting a separate detection pipeline, which not only ensures the continuity of operation, but also reduces the operational risks brought by external pipelines in high-pressure environments. Attached Figure Description

[0019] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0020] Figure 1 This is a schematic diagram of the structure of the present invention;

[0021] Figure 2 This is a schematic diagram of the detection and sampling device of the present invention;

[0022] Figure 3 This is a schematic diagram of the internal structure of the wedge-shaped drive box of the present invention;

[0023] Figure 4 This is a schematic diagram of the installation of the first and second semicircular plates of the present invention;

[0024] Figure 5 This is a schematic diagram showing the fit of the first fitting ring, the second fitting ring, and the rotating rod of the present invention.

[0025] Figure 6 This is a top view of the mounting box of the present invention;

[0026] Figure 7 This is a side view of the mounting box of the present invention;

[0027] Figure 8This is a schematic diagram of the installation of the sector plate of the present invention.

[0028] In the diagram: 1. Three-way valve; 2. Y-type tee; 3. Connecting pipe; 4. Pressure gauge; 5. Discharge flange assembly; 6. Detection and sampling device; 7. Mounting box; 8. Linear drive component; 9. Temporary storage box; 10. Sampling head one; 11. Semicircular plate one; 12. Semicircular plate two; 13. Horizontal plate; 14. Sampling tube; 15. Sampling head two; 16. Wedge drive box; 17. Rotating rod; 18. Connecting rod; 19. First pulley; 20. Belt; 21. Bevel gear one; 22. Umbrella gear... 23. Gear 2; 24. Rotating rod; 25. Mating ring 1; 26. Racket 1; 27. Pawl 1; 28. Pawl 2; 29. ​​Mating ring 2; 30. Arc-shaped toothed plate; 31. L-shaped connecting rod; 32. Stepped ring; 33. Collar; 34. Guide groove; 35. Sampling hose; 36. Rotating plate; 37. Sector plate; 38. Gear 1; 39. Annular toothed plate; 40. Divider plate; 41. Through hole 1; 42. Through hole 2; 43. Second pulley; 44. Racket 2. Detailed Implementation

[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] In the description of this invention, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0031] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0032] Example 1:

[0033] Embodiments of the present invention provide a dual-outlet high-pressure manifold for fracturing, such as... Figures 1-8 As shown, it includes two three-way valves 1 set on the left and right sides respectively. A discharge flange assembly 5 is installed on the three-way valve 1. A connecting pipe 3 is installed on the side of the three-way valve 1 that is close to each other. A pressure gauge 4 and a detection and sampling device 6 are installed on the connecting pipe 3. A Y-type tee 2 is also connected through the three-way valve 1. The Y-type tee 2 is connected to the fracturing truck.

[0034] A flow meter is connected through the three-way valve 1.

[0035] The working principle and beneficial effects of the above technical solution are as follows: the fracturing truck delivers high-pressure fracturing fluid to the three-way valves 1 on both sides through the Y-type three-way valve 2, and connects to the manifold downhole through the discharge flange assembly 5. The connecting pipe 3 connects the three-way valves 1 on both sides, and the pressure gauge 4 monitors the pressure in the connecting pipe 3 in real time. The detection and sampling device 6 is activated when sampling is required to sample the high-pressure fracturing fluid in the connecting pipe 3.

[0036] By setting pressure gauge 4, pressure fluctuations within the manifold can be monitored in real time, providing early warnings of risks such as overpressure and sudden pressure changes. Meanwhile, by setting up the sampling device 6, fracturing fluid samples can be extracted directly from the connecting pipe 3 without interrupting the manifold operation, avoiding the cumbersome operation of connecting to a separate testing pipeline. This ensures operational continuity and reduces the operational risks associated with connecting external pipelines under high pressure.

[0037] Example 2:

[0038] Based on the above embodiment 1, as follows Figures 1-2 , Figures 6-7 As shown, the detection and sampling device 6 includes a mounting box 7, which is fixedly installed on the connecting pipe 3. A temporary storage box 9 is provided inside the mounting box 7. A sampling tube 14 is slidably installed through the mounting box 7 and extends into the connecting pipe 3. Several sampling heads 10 and several sampling heads 2 15 are provided on the sampling tube 14.

[0039] Preferably, a sampling hose 34 is rotatably provided at the upper end of the sampling tube 14, and an installation block is provided on the temporary storage box 9. The sampling hose 34 is fixedly installed on the temporary storage box 9 by the installation block. Two sampling heads 10 and two sampling heads 15 are provided, with the sampling heads 10 located above the sampling heads 15.

[0040] Both the sampling tube 14 and the sampling head 10 are equipped with valves, with the valve in the sampling tube 14 located at the bottom of the sampling head 10.

[0041] The working principle and beneficial effects of the above technical solution are as follows: When it is necessary to sample the inside of the connecting pipe 3, the valves in the sampling pipe 14 and the sampling head 10 are opened simultaneously (or only the valve in the sampling head 10 can be opened, which can be controlled by those skilled in the art). The fracturing fluid enters the sampling pipe 14 through several sampling heads 10 and several sampling heads 2 15, then enters the sampling hose 34, and finally enters the temporary storage tank 9. By setting two sets of sampling heads at different positions, fluid samples at different positions in the connecting pipe 3 can be collected simultaneously, avoiding single-point sampling deviation. Moreover, the sampling process does not require interruption of the manifold operation, making it more functional and practical.

[0042] Example 3:

[0043] Based on the above embodiment 2, such as Figures 1-3 , Figures 6-7 As shown, a connecting rod 18 is fixedly installed inside the connecting pipe 3, and a wedge-shaped drive box 16 is fixedly installed at the lower end of the connecting rod 18. A horizontal plate 13 is rotatably connected to the wedge-shaped drive box 16. The sampling tube 14 slides through the horizontal plate 13. Several sampling heads 10 are located on the upper side of the horizontal plate 13, and several sampling heads 15 are located on the lower side of the horizontal plate 13.

[0044] Preferably, a drive motor is fixedly installed inside the mounting box 7. A gear 37 is fixedly connected to the output end of the drive motor. A gear 2 is meshed with the gear 37. A rotating rod 17 is fixedly installed in the center of the gear 2. A first pulley 19 is fixedly installed at the upper end of the rotating rod 17. A second pulley 42 is installed on the sampling tube 14. A belt 20 is installed on the first pulley 19 and the second pulley 42.

[0045] The working principle and beneficial effects of the above technical solution are as follows: The drive motor is started, which drives gear 37 to rotate. Gear 37 drives rotating rod 17 to rotate, which drives first pulley 19 to rotate. First pulley 19 drives second pulley 42 to rotate via belt 20. Second pulley 42 drives sampling tube 14 to rotate. During the rotation of sampling tube 14, sampling head 10 and sampling head 25 also rotate. Fracturing fluid enters sampling tube 14 through rotating sampling head 10 and sampling head 25, ensuring that the sampling position covers the entire circumferential area of ​​the connecting pipe 3 cross-section. This eliminates sample deviation caused by fluid stratification, eddies, and other factors, resulting in more comprehensive and accurate sampling.

[0046] Example 4:

[0047] Based on the above embodiment 3, Figures 6-8As shown, a stepped ring 31 is fixedly installed on the upper end of the second pulley 42, and an annular toothed plate 38 is fixedly installed on the stepped ring 31. A connecting key is provided in the second pulley 42 and the stepped ring 31, and a keyway is provided on the sampling tube 14. The second pulley 42 and the stepped ring 31 are slidably connected to the sampling tube 14 through the cooperation of the connecting key and the keyway.

[0048] The mounting box 7 is equipped with a rotating shaft, on which a rotating plate 35 is fixedly mounted. The rotating plate 35 is provided with several guide grooves 33. The rotating shaft rotates backward and extends out of the mounting box 7. A fan-shaped plate 36 is fixedly mounted at the rear end of the rotating shaft. An arc-shaped toothed plate 29 is fixedly mounted at the lower end of the fan-shaped plate 36. The arc-shaped toothed plate 29 is meshed with an annular toothed plate 38. A partition plate 39 is also fixedly mounted inside the mounting box 7, which divides the mounting box 7 into a first chamber and a second chamber.

[0049] The working principle and beneficial effects of the above technical solution are as follows: When the second pulley 42 rotates, it drives the stepped ring 31 and the annular toothed plate 38 to rotate together. The annular toothed plate 38 causes the arc-shaped toothed plate 29 to rotate, which in turn drives the sector plate 36 to rotate. The sector plate 36 then drives the rotating shaft and the rotating plate 35 to rotate. Since the annular toothed plate 38 will always rotate in one direction or stop rotating, the arc-shaped toothed plate 29 will remain in its original position. That is, the rotating plate 35 will maintain an inclined state. The fracturing fluid will enter the first chamber or the second chamber under the action of the rotating plate 35 and several guide grooves 33. Similarly, the rotating plate 35 can also be tilted in the opposite direction to enter another chamber.

[0050] For example, first close the valve in the sampling tube 14, and the fracturing fluid enters the first chamber through the upper sampling head 10; then start the drive motor in reverse to open the valves in the sampling tube 14 and the sampling head 10, and the fracturing fluid enters the second chamber through the sampling head 10 and the sampling head 15, thereby obtaining more sample points. Then, the liquid at different heights of the samples is tested, making the test more comprehensive and representative.

[0051] Example 5:

[0052] Based on the above embodiments 1-4, Figure 2 , Figure 6 and Figure 7 As shown, a linear drive 8 is fixedly installed on the rear inner wall of the mounting box 7. An L-shaped connecting rod 30 is fixedly connected to the lower output end of the linear drive 8. A collar 32 is fixedly connected to the other end of the L-shaped connecting rod 30. The collar 32 is rotatably sleeved on the sampling tube 14.

[0053] The working principle and beneficial effects of the above technical solution are as follows: During the sampling process, the linear drive component 8 drives the L-shaped connecting rod 30 to move, the L-shaped connecting rod 30 drives the collar 32 to move, and the collar 32 drives the sampling tube 14 to move, thereby changing the vertical height position of the sampling head 10 and the sampling head 15, quickly driving the sampling head to collect samples at different depths. In conjunction with the rotating liquid sampling direction, a spiral sampling trajectory is formed to achieve three-dimensional sampling, further increasing the comprehensiveness and accuracy of sampling.

[0054] Example 6:

[0055] Based on the above embodiment 5, Figures 2-5 As shown, a bevel gear 21 is provided inside the wedge-shaped drive box 16. The rotating rod 17 slides downward and extends into the wedge-shaped drive box 16. The lower end of the rotating rod 17 is fixedly provided with the bevel gear 21. The other end of the bevel gear 21 is meshed with a bevel gear 22. A rotating rod 23 is fixedly provided on the bevel gear 22. The rotating rod 23 rotates through the horizontal plate 13. The rotating rod 23 is symmetrically provided with a semicircular plate 11 and a semicircular plate 12 on the left and right sides.

[0056] Preferably, a mating ring 24 is fixedly provided in the center of the semicircular plate 11, and a plurality of pawls 26 are fixedly provided on the outer circular surface of the mating ring 24. The rotating rod 23 is hollow, and a plurality of ratchet teeth 25 are fixedly provided on the inner circular surface of the rotating rod 23. The plurality of ratchet teeth 25 cooperate with the plurality of pawls 26.

[0057] Preferably, a mating ring 28 is fixedly provided in the center of the semi-circular plate 212, and a number of pawls 27 are fixedly provided on the inner circular surface of the mating ring 28. A number of ratchet teeth 43 are fixedly provided on the outer circular surface of the rotating rod 23, and the number of ratchet teeth 43 cooperate with the number of pawls 26.

[0058] A number of through holes 40 are provided on the first semicircular plate 11, and a number of through holes 41 are provided on the second semicircular plate 12. When the first semicircular plate 11 and the second semicircular plate 12 overlap, the number of through holes 40 and the number of through holes 41 are distributed alternately.

[0059] When the semicircular plate 11 and the semicircular plate 2 12 are not intersected, they can achieve a certain degree of filtration effect.

[0060] The working principle and beneficial effects of the above technical solution are as follows: When the rotating rod 17 rotates, the rotating rod 17 drives the bevel gear 21 to rotate, the bevel gear 21 drives the bevel gear 22 to rotate, the bevel gear 22 drives the rotating rod 23 to rotate, and the rotating rod 23 will cause several ratchet teeth 25 and several ratchet teeth 43 to rotate.

[0061] When ratchet 25 engages with pawl 26, it drives mating ring 24 to rotate, causing semicircular plate 11 to rotate. Eventually, semicircular plate 11 rotates to the lower side, forming a sealed space under horizontal plate 13. At this point, the valve inside sampling head 10 closes, while the valve inside sampling tube 14 opens, allowing fracturing fluid to enter through sampling head 15 into sampling tube 14, creating a static sampling effect. This can be compared with dynamic sampling for better sampling results. Similarly, when ratchet 43 engages with pawl 26, it drives mating ring 28 to rotate, causing semicircular plate 12 to rotate to the upper side, forming a sealed space on the upper side of horizontal plate 13. This also allows for comparison of static sampling results on both sides, resulting in higher sampling accuracy and better performance.

[0062] By employing a dual-mode sampling mechanism of static and dynamic sampling, dynamic sampling captures the real-time flow characteristics of the fluid, while static sampling locks in local deposition or stratification. The cross-validation of the two data reduces the error rate in proppant concentration detection. The flipping of the two semicircular plates creates upper and lower area isolation, allowing for the simultaneous acquisition of static samples at different depths (low-velocity zone near the wall and high-velocity zone in the center) of the connecting pipe cross-section, resulting in more accurate parameters.

[0063] With the above structure, under the action of a drive motor, the sampling tube 14 rotates and slides, causing the sampling head 10 and sampling head 15 to form a spiral three-dimensional sampling trajectory, covering the entire cross-sectional space of the connecting tube 3, resulting in better sampling effect. In addition, the drive semicircular plate 11 and semicircular plate 12 alternately rotate to construct a static closed sampling space in the upper and lower areas of the horizontal plate, forming a data comparison with dynamic sampling, providing a more accurate basis for optimizing fracturing process parameters.

[0064] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention.

Claims

1. A dual-outlet high-pressure manifold for fracturing, characterized in that, It includes two three-way valves (1) set on the left and right sides respectively. A discharge flange assembly (5) is installed on the three-way valve (1). A connecting pipe (3) is installed on the side of the three-way valve (1) that is close to each other. A pressure gauge (4) and a detection and sampling device (6) are installed on the connecting pipe (3). A Y-type tee (2) is also connected through the three-way valve (1). The Y-type tee (2) is connected to the fracturing truck. The detection sampling device (6) includes a mounting box (7), which is fixedly installed on the connecting pipe (3). A temporary storage box (9) is provided inside the mounting box (7). A sampling tube (14) is slidably installed through the mounting box (7). The sampling tube (14) extends slidably into the connecting pipe (3). Several sampling heads (10) and several sampling heads (15) are provided on the sampling tube (14). The upper end of the sampling tube (14) is rotatably connected with a sampling hose (34), and a mounting block is provided on the temporary storage box (9). The sampling hose (34) is fixedly installed on the temporary storage box (9) through the mounting block. There are two of each of the first sampling head (10) and the second sampling head (15), with the first sampling head (10) located above the second sampling head (15). A connecting rod (18) is fixedly installed inside the connecting tube (3). A wedge-shaped drive box (16) is fixedly installed at the lower end of the connecting rod (18). A horizontal plate (13) is rotatably connected to the wedge-shaped drive box (16). The sampling tube (14) slides through the horizontal plate (13). Several sampling heads (10) are located on the upper side of the horizontal plate (13), and several sampling heads (15) are located on the lower side of the horizontal plate (13). A drive motor is fixedly installed inside the mounting box (7). A gear 1 (37) is fixedly connected to the output end of the drive motor. A gear 2 is meshed on the gear 1 (37). A rotating rod (17) is fixedly installed in the center of the gear 2. A first pulley (19) is fixedly installed at the upper end of the rotating rod (17). A second pulley (42) is installed on the sampling tube (14). A belt (20) is installed on the first pulley (19) and the second pulley (42). A stepped ring (31) is fixedly provided on the upper end of the second pulley (42), and an annular toothed plate (38) is fixedly provided on the stepped ring (31). A connecting key is provided inside the second pulley (42) and the stepped ring (31), and a keyway is provided on the sampling tube (14). The second pulley (42) and the stepped ring (31) are slidably connected to the sampling tube (14) through the cooperation of the connecting key and the keyway. The mounting box (7) is equipped with a rotating shaft, and a rotating plate (35) is fixedly mounted on the rotating shaft. Several guide grooves (33) are provided on the rotating plate (35). The rotating shaft rotates backward and extends out of the mounting box (7). A fan-shaped plate (36) is fixedly mounted at the rear end of the rotating shaft. An arc-shaped toothed plate (29) is fixedly mounted at the lower end of the fan-shaped plate (36). The arc-shaped toothed plate (29) meshes with the annular toothed plate (38). A partition plate (39) is also fixedly mounted inside the mounting box (7). The partition plate (39) divides the mounting box (7) into a first chamber and a second chamber.

2. The dual-outlet high-pressure manifold for fracturing according to claim 1, characterized in that, A linear drive (8) is fixedly installed on the inner rear wall of the mounting box (7). An L-shaped connecting rod (30) is fixedly connected to the lower output end of the linear drive (8). A collar (32) is fixedly connected to the other end of the L-shaped connecting rod (30). The collar (32) is rotatably sleeved on the sampling tube (14).

3. The dual-outlet high-pressure manifold for fracturing according to claim 1, characterized in that, A bevel gear 1 (21) is provided inside the wedge-shaped drive box (16). The rotating rod (17) slides downward and extends into the wedge-shaped drive box (16). The lower end of the rotating rod (17) is fixedly provided with bevel gear 1 (21). The other end of bevel gear 1 (21) is meshed with bevel gear 2 (22). A rotating rod (23) is fixedly provided on bevel gear 2 (22). The rotating rod (23) rotates through the horizontal plate (13). Semicircular plate 1 (11) and semicircular plate 2 (12) are symmetrically arranged on the rotating rod (23).

4. A dual-outlet high-pressure manifold for fracturing according to claim 3, characterized in that, A mating ring (24) is fixedly installed in the center of the semicircular plate (11). Several pawls (26) are fixedly installed on the outer circular surface of the mating ring (24). The rotating rod (23) is hollow. Several ratchet teeth (25) are fixedly installed on the inner circular surface of the rotating rod (23). Several ratchet teeth (25) and several pawls (26) are mated together.

5. A dual-outlet high-pressure manifold for fracturing according to claim 4, characterized in that, A mating ring 2 (28) is fixedly installed in the center of the semicircular plate 2 (12). Several pawls 2 (27) are fixedly installed on the inner circular surface of the mating ring 2 (28). Several ratchet teeth 2 (43) are fixedly installed on the outer circular surface of the rotating rod (23). Several ratchet teeth 2 (43) and several pawls 2 (27) are mated together. A number of through holes 1 (40) are provided on the first semicircular plate (11), and a number of through holes 2 (41) are provided on the second semicircular plate (12). When the first semicircular plate (11) and the second semicircular plate (12) overlap, the number of through holes 1 (40) and the number of through holes 2 (41) are distributed alternately.

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