175MPa ultrahigh pressure oil nozzle manifold

Abstract

The invention relates to the technical field of oil and gas well ground throttling processes, and discloses a 175MPa ultrahigh-pressure oil nozzle manifold which comprises a four-way pipe, an inlet of the four-way pipe is communicated with an upstream high-pressure pipeline, and one outlet of the four-way pipe is sequentially connected with a first electric gate valve, an adjustable throttling valve, a first three-way pipe, a second electric gate valve and a five-way pipe through pipelines. The whole pipeline adopts a three-channel design, the throttling efficiency and flexibility are improved, in an adjustable throttling channel, a lantern ring rotates to drive a valve rod to ascend and descend, the size of a gap between a valve element and a valve seat assembly can be adjusted, then the flow of fluid in the channel is adjusted, when a limiting assembly unlocks a protruding block, the lantern ring rotates to drive the valve rod to rotate synchronously, and therefore the flow of fluid in the channel is adjusted. At the moment, the valve rod and the valve element can rotate, so that the positions of the fluid impacting the valve rod and the valve element can be changed, the stress surfaces of the valve rod and the valve element are regularly changed, excessive loss of a single area is avoided, the overall durability is improved, and the maintenance period is prolonged.

Description

Technical Field

[0001] The invention relates to the technical field of surface throttling technology for oil and gas wells, and in particular to a 175MPa ultra-high pressure oil nozzle manifold. Background Art

[0002] In the complex industrial environment of oil extraction and high-pressure fluid transportation, the nozzle manifold is a vital equipment component. It undertakes key tasks such as pressure regulation, flow control and flow distribution of high-pressure fluids. With the continuous advancement of oil exploration and development to deep and ultra-deep layers, and the discovery of high-pressure oil and gas reservoirs, the pressure range that traditional nozzle manifolds can withstand can no longer meet the growing demand for ultra-high pressure working conditions.

[0003] Therefore, in the existing nozzle manifold design, more and more nozzle throttle manifolds with adjustable throttle valves and fixed throttle valves are used. This design, especially the introduction of adjustable throttle valves, adds a channel for the fluid delivery system to flexibly adjust the fluid flow rate. This improvement significantly improves the adaptability of the nozzle manifold to complex industrial environments such as oil extraction and high-pressure fluid delivery.

[0004] The working principle of the adjustable throttle valve is mainly to achieve effective control of the fluid flow by accurately adjusting the gap size between the valve core and the valve seat assembly. However, when the fluid flows in the valve, it will have a continuous flushing effect on the valve stem and the valve core. Especially in complex and changeable industrial environments, the fluid is often mixed with various impurities, such as particulate matter, corrosive substances, etc. The presence of these impurities further aggravates the wear of the valve stem and the valve core. As time goes by, this wear will not only reduce the sealing performance of the valve, but more seriously will lead to safety hazards such as fluid leakage. Based on this, the present invention purposely provides a 175MPa ultra-high pressure oil nozzle manifold that can avoid the continuous impact of the fluid on the valve stem and the valve core, resulting in a reduction in the sealing performance of the valve. Summary of the invention

[0005] The purpose of the present invention is to provide a 175MPa ultra-high pressure nozzle manifold to solve the technical problems in the prior art in view of the deficiencies in the prior art.

[0006] The purpose of the present invention can be achieved through the following technical solutions:

[0007] A 175MPa ultra-high pressure nozzle manifold, comprising:

[0008] A four-way pipe, an inlet of which is connected to an upstream high-pressure pipeline, one outlet of which is connected to a first electric gate valve, an adjustable throttle valve, a first three-way pipe, a second electric gate valve and a five-way pipe in sequence through a pipeline, another outlet of which is connected to a third electric gate valve, a fixed throttle valve, a second three-way pipe, a fourth electric gate valve and a five-way pipe in sequence through a pipeline, one outlet of which is connected to an instrument flange, another outlet of which is connected to a downstream pipeline, and one inlet of which is connected to the four-way pipe through a fifth electric gate valve;

[0009] A sleeve, which is fixedly mounted on the adjustable throttle valve, a valve seat assembly is fixedly mounted in the adjustable throttle valve, and a valve stem is slidably mounted therein, a valve core is fixedly mounted on one end of the valve stem, and the other end of the valve stem is located in the sleeve, and the end is fixedly connected to two symmetrically arranged protrusions, a limit assembly is arranged in the sleeve, and the limit assembly is connected to the protrusion;

[0010] The sleeve is rotatably mounted in the sleeve and driven to rotate by the driving assembly. The sleeve is coaxially sleeved on the valve stem and is threadedly connected to the valve stem.

[0011] As a further solution of the present invention: the limit assembly includes a cylinder, a guide groove, a fixed disk, a slider and a groove, the fixed disk is fixedly installed in the sleeve, the cylinder is fixedly installed on the fixed disk, two guide grooves are opened on the cylinder, and the two guide grooves are symmetrically arranged, the protrusion is slidably installed in the guide groove, the two sliders correspond to the two protrusions respectively, and the two grooves are opened on the two sliders respectively, the slider is slidably installed in the fixed disk, and its bottom end is slidably connected with the top end of the cylinder, and a control assembly is arranged on the fixed disk, and the two sliders are driven by the control assembly to move toward each other, when the two sliders are close, the groove and the guide groove are aligned, at this time the protrusion is slidably connected with the groove, when the two sliders are far away, the protrusion moves out of the groove, at this time the driving assembly drives the ring to rotate, driving the valve stem to rotate synchronously.

[0012] As a further solution of the present invention: the control component includes a rack plate and a transmission gear, the two rack plates are fixedly connected to the two sliders respectively, and the two rack plates are slidably mounted on the fixed disk, the transmission gear is rotatably mounted on the fixed disk, it is driven to rotate by the output source, and it is located between the two rack plates, and the transmission gear is meshed with the two rack plates.

[0013] As a further solution of the present invention: the first electric gate valve is connected to an opening, a sealing cover is installed on the opening, a supporting frame is installed on the sealing cover, a filter is fixedly installed on one end of the supporting frame, and the filter covers the outlet of the valve seat channel in the first electric gate valve. When the fluid flows into the first electric gate valve from the inlet, the fluid will pass through the valve seat channel and the filter in sequence and then flow out from the outlet of the first electric gate valve.

[0014] As a further solution of the present invention: the sealing cover and the opening are detachably connected.

[0015] As a further solution of the present invention: the support frame is slidably connected to the sealing cover, and a dynamic seal is provided at the sliding connection between the two.

[0016] As a further solution of the present invention: the adjustable throttle valve is connected to the first three-way pipe via a first double-flange short section, and the fixed throttle valve is connected to the second three-way pipe via a second double-flange short section.

[0017] As a further solution of the present invention: one outlet of the first tee pipe is connected to a first blind flange, and one outlet of the second tee pipe is connected to a second blind flange.

[0018] Beneficial effects of the present invention:

[0019] 1. In the present invention, the entire pipeline adopts a three-channel design, and the left and right sides are respectively designed as a fixed throttling channel and an adjustable throttling channel. The middle channel is used as a safety channel to improve throttling efficiency and flexibility while enhancing safety and reliability. In the adjustable throttling channel, the size of the gap between the valve core and the valve seat assembly can be adjusted by rotating the collar to drive the valve stem to rise and fall, thereby adjusting the size of the fluid flow in the channel. When the limit assembly unlocks the protrusion, the rotation of the collar will drive the valve stem to rotate synchronously. At this time, the valve stem and the valve core will rotate, thereby changing the position where the fluid impacts the valve stem and the valve core. In this way, by regularly changing the force-bearing surface of the valve stem and the valve core, excessive loss of a single area can be avoided, the overall durability can be improved, and the maintenance cycle can be extended;

[0020] 2. In the present invention, when the two sliders are close to each other, the groove and the guide groove are aligned, and the protrusion slides in the guide groove and the groove, so that the valve stem can only be lifted and lowered but not rotated. When the protrusion moves into the groove and the two sliders are far away from each other, the protrusion moves out of the groove and the protrusion loses its restriction. At this time, the driving assembly drives the ring to rotate to make the valve stem rotate synchronously, thereby changing the force-bearing surface of the valve stem and the valve core. In addition, this structure ensures that the valve stem can only rotate when it rises to the highest point, that is, the valve core is away from the valve seat assembly, so as to avoid the valve core abutting against the valve seat assembly to rotate, resulting in the problem that the friction between the two hinders the rotation of the valve stem;

[0021] 3. In the present invention, when the fluid passes through the filter, impurities contained in the fluid will be intercepted by the filter, which plays a filtering role, and the filtered fluid discharged from the outlet of the first electric gate valve will directly enter the adjustable throttle valve, so as to avoid the impurities in the fluid from impacting the valve stem and the valve core, causing the problem of accelerated wear of the valve stem and the valve core. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The present invention will be further described below in conjunction with the accompanying drawings.

[0023] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 It is a schematic diagram of the cross-sectional structure of the adjustable throttle valve in the present invention;

[0025] Figure 3 It is a schematic diagram of the cross-sectional structure of the sleeve in the present invention;

[0026] Figure 4 It is a schematic diagram of the cross-sectional structure of a cylinder in the present invention;

[0027] Figure 5 It is a schematic diagram of the bottom structure of the first electric gate valve in the present invention;

[0028] Figure 6 It is a schematic diagram of the cross-sectional structure of the first electric gate valve in the present invention;

[0029] Figure 7 It is a schematic diagram of the installation structure of the carrier frame and the filter screen in the present invention.

[0030] In the figure: 1, four-way pipe; 2, first electric gate valve; 3, adjustable throttle valve; 301, sleeve; 4, first double flange short section; 5, first three-way pipe; 6, second electric gate valve; 7, five-way pipe; 8, instrument flange; 9, third electric gate valve; 10, fixed throttle valve; 11, second double flange short section; 12, second three-way pipe; 13, fourth electric gate valve; 14, fifth electric gate valve; 15, first blind flange; 16, second blind flange; 17, valve seat assembly; 18, valve stem; 19, valve core; 20, bump; 21, collar; 22, cylinder; 23, guide groove; 24, fixed plate; 25, slider; 26, groove; 27, rack plate; 28, transmission gear; 29, opening; 30, sealing cover; 31, carrier frame; 32, filter screen; 33, valve seat channel; 34, pressure relief screw assembly. DETAILED DESCRIPTION

[0031] 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.

[0032] See also Figure 1-Figure 7 As shown, the present invention is a 175MPa ultra-high pressure nozzle manifold, comprising:

[0033] A four-way pipe 1, whose inlet is connected to an upstream high-pressure pipeline, one of the outlets of the four-way pipe 1 is connected to a first electric gate valve 2, an adjustable throttle valve 3, a first three-way pipe 5, a second electric gate valve 6 and a five-way pipe 7 in sequence through a pipeline, another outlet of the four-way pipe 1 is connected to a third electric gate valve 9, a fixed throttle valve 10, a second three-way pipe 12, a fourth electric gate valve 13 and a five-way pipe 7 in sequence through a pipeline, one outlet of the five-way pipe 7 is connected to an instrument flange 8, another outlet of the five-way pipe 7 is connected to a downstream pipeline, and one inlet of the five-way pipe 7 is connected to the four-way pipe 1 through a fifth electric gate valve 14;

[0034] The sleeve 301 is fixedly mounted on the adjustable throttle valve 3. A valve seat assembly 17 is fixedly mounted in the adjustable throttle valve 3, and a valve stem 18 is slidably mounted therein. A valve core 19 is fixedly mounted on one end of the valve stem 18. The other end of the valve stem 18 is located in the sleeve 301, and the end is fixedly connected to two symmetrically arranged protrusions 20. A limit assembly is arranged in the sleeve 301, and the limit assembly is connected to the protrusion 20.

[0035] The collar 21 is rotatably mounted in the sleeve 301 and driven to rotate by the driving assembly. The collar 21 is coaxially sleeved on the valve stem 18 and is threadedly connected to the valve stem 18 .

[0036] In one case of the present embodiment, a pressure relief screw assembly 34 is arranged in the adjustable throttle valve 3, and the pressure relief screw assembly 34 includes a pressure relief screw, a spring, a valve disc, a sealing gasket, etc.; a double-scale sulfur-proof and shock-resistant pressure gauge, a pressure gauge buffer, etc. are connected to the instrument flange 8; it should be noted that the first electric gate valve 2, the adjustable throttle valve 3, the fixed throttle valve 10, the second electric gate valve 6 and the fifth electric gate valve 14 of the present invention are all prior arts, and therefore, there is no need to disclose their specific mechanical structure and circuit structure, and it does not affect the integrity of the present invention; the driving assembly can select components such as a gear set driven by a motor, a pulley assembly driven by a motor, and other components, and can also select other mechanisms that can realize the rotational movement of the ring 21, and this embodiment is not specifically limited here.

[0037] The working principle of the present invention is as follows: connect the four-way pipe 1 to the upstream high-pressure pipeline and connect the five-way pipe 7 to the downstream pipeline. Figure 1Taking the example shown in the figure, the first electric gate valve 2, the fifth electric gate valve 14, and the second electric gate valve 6 are closed and the third electric gate valve 9 and the fourth electric gate valve 13 are opened. At this time, the fluid will flow from the fixed throttling channel on the left side of the four-way pipe 1 to the five-way pipe 7. At this time, the fixed throttling valve 10 will limit the fluid flow rate of the fluid in the channel to keep it stable. This stable flow output ensures the normal operation of the equipment and the stability of the process. When the third electric gate valve 9, the fourth electric gate valve 13, and the fifth electric gate valve 14 are closed and the first electric gate valve 2 and the second electric gate valve 6 are opened, the fluid will The fluid flows from the adjustable throttling channel on the right side of the four-way pipe 1 to the five-way pipe 7. At this time, the adjustable throttling valve 3 ensures the throttling stable flow rate. The adjustable gap between the valve core 19 and the valve seat assembly 17 in the adjustable throttling valve 3 means that the flow rate in the throttling channel can be adjusted, so that the back pressure can be more accurately controlled to maintain a stable bottom hole pressure. The flow path from the four-way pipe 1 to the five-way pipe 7 through the fifth electric gate valve 14 is the shortest. When the pressure in the main pipe exceeds 175MPa or direct discharge is required, the fifth electric gate valve 14 can be directly opened to accelerate the discharge of the fluid.

[0038] When the adjustable throttle passage with the adjustable throttle valve 3 is used, the fluid enters from the inlet of the adjustable throttle valve 3, then flows through the gap between the valve core 19 and the valve seat assembly 17, and finally is discharged from the outlet of the adjustable throttle valve 3. During this process, the fluid will continuously impact the valve stem 18 and the valve core 19, and in a complex environment, other impurities are also mixed in the fluid, which will cause wear of the valve stem 18 and the valve core 19 where they are washed by the fluid;

[0039] When the limit assembly limits the protrusion 20, the driving assembly drives the collar 21 to rotate. The collar 21 and the valve stem 18 are threadedly connected. Therefore, the rotation of the collar 21 will drive the valve stem 18 to rise and fall, thereby adjusting the gap between the valve core 19 and the valve seat assembly 17, and then adjusting the fluid flow in the channel. When the limit assembly unlocks the protrusion 20, the threaded section in the collar 21 and the threaded groove on the outer surface of the valve stem 18 are engaged. At this time, the collar 21 is driven by the driving assembly to rotate, and this rotation will be transmitted through the tight fit of the thread. The rotation of the collar 21 is transferred to the valve stem 18, and the rotational movement of the collar 21 is converted into an axial force on the valve stem 18 along the spiral path of the thread. At the same time, due to the meshing characteristics of the thread, the rotation of the collar 21 will also drive the valve stem 18 to rotate synchronously. At this time, the valve stem 18 and the valve core 19 will rotate, thereby changing the position where the fluid impacts the valve stem 18 and the valve core 19. In this way, by regularly changing the force-bearing surfaces of the valve stem 18 and the valve core 19, excessive wear of a single area can be avoided, and the overall durability can be improved, thereby extending the maintenance cycle and reducing the replacement frequency.

[0040] like Figure 2-Figure 4As shown, as a preferred embodiment of the present invention, the limit assembly includes a cylinder 22, a guide groove 23, a fixed disk 24, a slider 25 and a groove 26, the fixed disk 24 is fixedly installed in the sleeve 301, the cylinder 22 is fixedly installed on the fixed disk 24, two guide grooves 23 are both opened on the cylinder 22, and the two guide grooves 23 are symmetrically arranged, the protrusion 20 is slidably installed in the guide groove 23, the two sliders 25 correspond to the two protrusions 20 respectively, and the two grooves 26 are respectively opened on the two sliders 25, the slider 25 is slidably installed in the fixed disk 24, and its bottom end is slidably connected with the top end of the cylinder 22, and a control assembly is arranged on the fixed disk 24, and the two sliders 25 are driven by the control assembly to move toward each other, when the two sliders 25 are close, the groove 26 and the guide groove 23 are aligned, at this time, the protrusion 20 is slidably connected with the groove 26, when the two sliders 25 are far away, the protrusion 20 moves out of the groove 26, and at this time the driving assembly drives the collar 21 to rotate, driving the valve stem 18 to rotate synchronously.

[0041] In practical application, if Figure 4 As shown in the example, the protrusion 20 is slidably installed in the guide groove 23, thereby restricting the valve stem 18 from rotating. When the control component drives the two sliders 25 to approach, the groove 26 and the guide groove 23 are aligned, and then the ring 21 rotates to drive the valve stem 18 to rise to the highest point, so that the gap between the valve core 19 and the valve seat assembly 17 is maximized, and the valve stem 18 rises to move the protrusion 20 from the guide groove 23 to the groove 26. Then the control component drives the two sliders 25 to move away, and the protrusion 20 moves out of the groove 26, and the protrusion 20 also loses the restriction. At this time, the driving component drives the ring 21 to rotate so that the valve stem 18 can rotate synchronously, thereby changing the force-bearing surfaces of the valve stem 18 and the valve core 19. After the valve stem 18 rotates 180 degrees, the control component drives the two sliders 25 to approach each other. At this time, the protrusion 20 returns to the groove 26, thereby restoring the function of restricting the rotation of the valve stem 18. In this way, it is ensured that the valve stem 18 can rotate only when it rises to the highest point, that is, the valve core 19 is away from the valve seat assembly 17, so as to avoid the valve core 19 abutting against the valve seat assembly 17 and rotating, resulting in the problem that the friction between the two hinders the rotation of the valve stem 18.

[0042] like Figure 2-Figure 4 As shown, as a preferred embodiment of the present invention, the control component includes a rack plate 27 and a transmission gear 28, the two rack plates 27 are fixedly connected to the two sliders 25 respectively, and the two rack plates 27 are slidably mounted on the fixed disk 24, the transmission gear 28 is rotatably mounted on the fixed disk 24, it is driven to rotate by the output source, and it is located between the two rack plates 27, and the transmission gear 28 is meshed with the two rack plates 27.

[0043] In one case of this embodiment, the output source may be a servo motor, a servo motor or other components, or other mechanisms capable of achieving rotational motion, which is not specifically limited in this embodiment.

[0044] In actual application of this embodiment, the transmission gear 28 is controlled to rotate through the output source, and the transmission gear 28 is meshed with the rack plates 27 on both sides, thereby driving the two rack plates 27 to move towards each other, so that the two sliders 25 will move at the same time, thereby achieving the effect of the two sliders 25 approaching and moving away.

[0045] like Figure 5-Figure 7 As shown, as a preferred embodiment of the present invention, the first electric gate valve 2 is connected with an opening 29, a sealing cover 30 is installed on the opening 29, a supporting frame 31 is installed on the sealing cover 30, a filter screen 32 is fixedly installed at one end of the supporting frame 31, and the filter screen 32 covers the outlet of the valve seat channel 33 in the first electric gate valve 2. When the fluid flows into the first electric gate valve 2 from the inlet, the fluid will pass through the valve seat channel 33 and the filter screen 32 in sequence and then flow out from the outlet of the first electric gate valve 2.

[0046] In actual application of this embodiment, after the fluid passes through the filter screen 32, impurities contained in the fluid will be intercepted by the filter screen 32, thereby playing a filtering role, and the filtered fluid discharged from the outlet of the first electric gate valve 2 will directly enter the adjustable throttle valve 3, thereby preventing impurities in the fluid from impacting the valve stem 18 and the valve core 19, causing the problem of accelerated wear of the valve stem 18 and the valve core 19.

[0047] like Figure 5-Figure 7 As shown, as a preferred embodiment of the present invention, the sealing cover 30 and the opening 29 are detachably connected.

[0048] In actual application of this embodiment, when the first electric gate valve 2 is closed, the sealing cover 30 can be removed from the opening 29, so that the filter screen 32 can be taken out from the first electric gate valve 2 for cleaning or replacement, thereby ensuring that the problem of excessive blockage of the filter screen 32 causing a reduction in flow in the channel during long-term use of the pipeline is avoided.

[0049] like Figure 5-Figure 7 As shown, as a preferred embodiment of the present invention, the support frame 31 is slidably connected to the sealing cover 30, and a dynamic seal is provided at the sliding connection between the two.

[0050] In one case of this embodiment, the dynamic seal refers to a technical solution for effectively closing the gaps between dynamic components or between dynamic components and static components during the operation of the equipment to prevent leakage of the medium or intrusion of external impurities. The dynamic seal generally includes dynamic rings, static rings, springs, push rings, O-rings and other components.

[0051] In actual application of this embodiment, when installing the sealing cover 30 on the opening 29, the two are directly connected first, and then the supporting frame 31 is manually pushed. When an obvious obstruction is felt, it means that the filter screen 32 covers the outlet of the valve seat channel 33 and can play a filtering role. There is no need to spend more time calibrating during installation. After the sealing cover 30 is installed on the opening 29, the filter screen 32 can just cover the outlet of the valve seat channel 33.

[0052] like Figure 1 As shown, as a preferred embodiment of the present invention, the adjustable throttle valve 3 is connected to the first three-way pipe 5 through the first double flange short section 4, and the fixed throttle valve 10 is connected to the second three-way pipe 12 through the second double flange short section 11.

[0053] In actual application of this embodiment, the first double flange short section 4 and the second double flange short section 11 are provided to make installation and disassembly relatively simple, so as to facilitate maintenance and replacement of the entire pipeline system.

[0054] like Figure 1 As shown, as a preferred embodiment of the present invention, one outlet of the first tee pipe 5 is connected to a first blind flange 15 , and one outlet of the second tee pipe 12 is connected to a second blind flange 16 .

[0055] In actual application of this embodiment, the purpose of installing the first blind flange 15 and the second blind flange 16 is to block the redundant outlets of the first tee pipe 5 and the second tee pipe 12. When repairing or replacing pipeline components, the first blind flange 15 and the second blind flange 16 can be easily removed, and the main pipeline can be contacted with other pipelines, so that the pipeline system is in a safe state during maintenance.

[0056] The above is a detailed description of an embodiment of the present invention, but the content is only a preferred embodiment of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. A 175MPa ultra-high pressure nozzle manifold, characterized in that: include: A four-way pipe (1), an inlet of which is connected to an upstream high-pressure pipeline, one outlet of the four-way pipe (1) is connected to a first electric gate valve (2), an adjustable throttle valve (3), a first three-way pipe (5), a second electric gate valve (6) and a five-way pipe (7) in sequence through a pipeline, another outlet of the four-way pipe (1) is connected to a third electric gate valve (9), a fixed throttle valve (10), a second three-way pipe (12), a fourth electric gate valve (13) and a five-way pipe (7) in sequence through a pipeline, one outlet of the five-way pipe (7) is connected to an instrument flange (8), another outlet of the five-way pipe (7) is connected to a downstream pipeline, and one inlet of the five-way pipe (7) is connected to the four-way pipe (1) through a fifth electric gate valve (14); A sleeve (301) is fixedly mounted on the adjustable throttle valve (3); a valve seat assembly (17) is fixedly mounted in the adjustable throttle valve (3), and a valve stem (18) is slidably mounted therein; a valve core (19) is fixedly mounted on one end of the valve stem (18); the other end of the valve stem (18) is located in the sleeve (301), and the end is fixedly connected to two symmetrically arranged protrusions (20); a limit assembly is arranged in the sleeve (301), and the limit assembly is connected to the protrusion (20); The collar (21) is rotatably mounted in the sleeve (301) and driven to rotate by the driving assembly. The collar (21) is coaxially sleeved on the valve stem (18) and is threadedly connected to the valve stem (18).

2. A 175MPa ultra-high pressure nozzle manifold according to claim 1, characterized in that: The limiting assembly comprises a cylinder (22), a guide groove (23), a fixed disk (24), a slider (25) and a groove (26); the fixed disk (24) is fixedly mounted in the sleeve (301); the cylinder (22) is fixedly mounted on the fixed disk (24); two guide grooves (23) are both provided on the cylinder (22); and the two guide grooves (23) are symmetrically arranged; the protrusion (20) is slidably mounted in the guide groove (23); the two sliders (25) correspond to the two protrusions (20) respectively; and the two grooves (26) are respectively provided on the two sliders (2 5), the slider (25) is slidably installed in the fixed disk (24), and its bottom end is slidably connected to the top of the cylinder (22). A control component is arranged on the fixed disk (24), and the two sliders (25) are driven by the control component to move toward each other. When the two sliders (25) are close to each other, the groove (26) and the guide groove (23) are aligned, and the protrusion (20) is slidably connected to the groove (26). When the two sliders (25) are separated, the protrusion (20) moves out of the groove (26), and the driving component drives the ring (21) to rotate, thereby driving the valve stem (18) to rotate synchronously.

3. A 175MPa ultra-high pressure nozzle manifold according to claim 2, characterized in that: The control assembly comprises a rack plate (27) and a transmission gear (28), the two rack plates (27) are fixedly connected to the two sliders (25) respectively, and the two rack plates (27) are slidably mounted on the fixed disk (24), the transmission gear (28) is rotatably mounted on the fixed disk (24), and is driven to rotate by an output source, and is located between the two rack plates (27), and the transmission gear (28) is meshed with the two rack plates (27).

4. The 175MPa ultra-high pressure nozzle manifold according to claim 1, characterized in that: The first electric gate valve (2) is connected to an opening (29), a sealing cover (30) is installed on the opening (29), a support frame (31) is installed on the sealing cover (30), a filter screen (32) is fixedly installed on one end of the support frame (31), and the filter screen (32) covers the outlet of the valve seat channel (33) in the first electric gate valve (2). When a fluid flows into the first electric gate valve (2) from the inlet, the fluid passes through the valve seat channel (33) and the filter screen (32) in sequence and then flows out from the outlet of the first electric gate valve (2).

5. A 175MPa ultra-high pressure nozzle manifold according to claim 4, characterized in that: The sealing cover (30) and the opening (29) are detachably connected.

6. A 175MPa ultra-high pressure nozzle manifold according to claim 5, characterized in that: The carrier frame (31) is slidably connected to the sealing cover (30), and a dynamic seal is provided at the sliding connection between the two.

7. The 175MPa ultra-high pressure nozzle manifold according to claim 1, characterized in that: The adjustable throttle valve (3) is connected to the first three-way pipe (5) via a first double-flange short section (4), and the fixed throttle valve (10) is connected to the second three-way pipe (12) via a second double-flange short section (11).

8. The 175MPa ultra-high pressure nozzle manifold according to claim 1, characterized in that: One outlet of the first three-way pipe (5) is connected to a first blind flange (15), and one outlet of the second three-way pipe (12) is connected to a second blind flange (16).

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