A seismic-resistant single-channel large-diameter high-low pressure fracturing manifold

Abstract

The present invention is applicable to the field of special equipment for oil and gas drilling and fracturing, and provides a seismic-resistant single-channel large-diameter high-low pressure fracturing manifold, including a plurality of flange straight pipes, and also including: a plurality of vibration-damping pipe groups, the vibration-damping pipe groups including a fixed pipe and a telescopic pipe, the fixed pipe is fixedly connected to an elastic support seat; the fixed pipe is annularly provided with a plurality of shell sleeves, the shell sleeves are fixedly connected with a guide rod, the guide rod passes through the connecting seat, and conical sleeves are provided on both sides of the guide rod. The seismic-resistant single-channel large-diameter high-low pressure fracturing manifold provided by the present invention, when vibration occurs, a relative force is generated between the fixed pipe and the telescopic pipe, at this time the limiting assembly pushes the conical sleeve, and the conical sleeve elastically limits the connecting seat, thereby absorbing the vibration force.

Description

Technical Field

[0001] The invention belongs to the field of special equipment for oil and natural gas drilling and fracturing, and in particular relates to a seismic-resistant single-channel large-diameter high- and low-pressure fracturing manifold. Background Art

[0002] At present, the domestic shale oil and shale gas fracturing technology level is constantly improving. With the popularization and application of electric fracturing skid equipment, the pump pressure and displacement during fracturing construction are getting higher and higher. The construction pressure of some operating blocks exceeds 120MPa, and the displacement exceeds 20 cubic meters per minute. The liquid pressed into the bottom of the well in each section exceeds 3,000 cubic meters, and the sand carried in each section exceeds 300 tons, and various construction records are constantly being refreshed. The widespread promotion of platform drilling has led to more and more wells on a single platform. Some platforms have more than 8 wells, and the high and low pressure fracturing manifolds are used for a longer period of time during platform fracturing operations. The electric fracturing skid is connected to the high and low pressure fracturing manifold through a union elbow or a flange short-circuit. The ultra-high pressure, large displacement, and high sand carrying ratio fracturing conditions have particularly high requirements for the high and low pressure fracturing manifold equipment downstream of the electric fracturing skid pump outlet. The vibration caused by the high-speed pumping of the electric fracturing skid and the vibration caused by the impact when the pumped fluid changes direction work together to cause the high and low pressure fracturing manifold to vibrate. Long-term vibration causes the bolts, nuts, pressure-bearing bodies and other components in the high- and low-pressure fracturing manifolds to be subjected to additional dynamic loads, resulting in loose nuts, fatigue fracture of bolts and pressure-bearing bodies, and causing equipment risks and well control accidents.

[0003] The existing publication number is CN112628607, which is a fracturing high- and low-pressure manifold system with a large-diameter bypass manifold bottom skid. The connecting nipple includes a plurality of rotating nipple sections and at least a telescopic rotating nipple section. The telescopic rotating nipple section includes a vertical telescopic rotating nipple section and a horizontal telescopic rotating nipple section. The rotating nipple section includes a fracturing pump discharge rotating nipple section connected to the fracturing pump discharge outlet, a connecting rotating nipple section, and a liquid discharge rotating nipple section connected to the high- and low-pressure combined manifold inlet. The fracturing pump discharge rotating nipple section is connected to the telescopic rotating nipple section, and the telescopic rotating nipple section is then connected to the liquid discharge rotating nipple section 12 through a flange pipe, an angle pass, and a connecting rotating nipple section. In this solution, the vibration generated by the traditional fracturing high- and low-pressure manifold system during operation and the impact effect of high-pressure fluid are solved by means of the design of the rotating nipple section and the telescopic rotating nipple section.

[0004] In the above scheme, the vibration generated during the operation of the fracturing high and low pressure manifold system is solved by means of the design of a rotating short section and a telescopic rotating short section. However, generally, under the action of the vibration force, the spring in the component will produce fatigue deformation, thereby reducing the vibration reduction effect. At the same time, when the spring produces fatigue deformation, the two parts of the telescopic short section will reciprocate and rub against each other under the action of the vibration force, thereby causing the gap between the two telescopic parts of the telescopic short section to increase, further increasing the vibration effect.

[0005] In order to avoid the above technical problems, it is necessary to provide a seismic-resistant single-channel large-diameter high-low pressure fracturing manifold to overcome the above defects in the prior art. Summary of the invention

[0006] The purpose of the present invention is to provide a shock-resistant single-channel large-diameter high- and low-pressure fracturing manifold, aiming to solve the problem of fatigue deformation of vibration-damping components in existing high- and low-pressure fracturing manifolds, which causes increased vibration and component friction.

[0007] The present invention is implemented as follows: a seismic-resistant single-channel large-diameter high-low pressure fracturing manifold comprises a plurality of flange straight pipes, a multi-way valve is connected between the flange straight pipes, a manual plug valve is arranged at the branch interface of the multi-way valve, a non-flange is connected to the manual plug valve, and the non-flange can be connected to a fracturing vehicle or an electric fracturing skid, and further comprises:

[0008] A plurality of vibration-damping pipe groups, the vibration-damping pipe groups are used to support the fracturing manifold as a whole, the vibration-damping pipe groups are respectively fixedly connected to the multi-way valves at the most side ends, the vibration-damping pipe groups include fixed pipes and telescopic pipes, and the fixed pipes are fixedly connected to elastic support seats;

[0009] The fixed tube is provided with a plurality of shells in an annular shape, and a slide groove is provided on the side wall of the fixed tube facing the shells, and the telescopic tube is fixedly connected with a plurality of connecting seats, and the connecting seats are all slidably matched with the slide groove;

[0010] A guide rod is fixedly connected in the shell sleeve, and the guide rod passes through the connecting seat. Conical sleeves are arranged on both sides of the guide rod, and the conical sleeves are slidably connected to the guide rod. A limiting assembly is arranged on one side of the conical sleeve, and the limiting assembly can elastically limit the conical sleeve.

[0011] A thrust mechanism is provided on one side of the limit assembly, and when the elasticity of the limit assembly to the tapered sleeve decreases, the thrust mechanism can push the limit assembly toward the tapered sleeve to tighten;

[0012] A positioning assembly is arranged between the fixed tube and the telescopic tube. When the limiting assembly approaches the conical sleeve and is tightened, the limiting assembly pushes the positioning assembly to clamp the telescopic tube.

[0013] The limiting assembly includes a No. 1 spring and a spring baffle. The No. 1 spring is sleeved outside the guide rod. One end of the No. 1 spring abuts against the conical sleeve, and the other end of the No. 1 spring abuts against the spring baffle. The spring baffle is slidably connected to the inner wall of the shell sleeve, and a vibration-absorbing cotton strip is arranged between the No. 1 springs.

[0014] According to a further technical solution, the thrust mechanism comprises a second spring, a thrust block and a clamping assembly;

[0015] The inner end surface of the shell sleeve is provided with a groove cavity, and a push block is slidably connected in the groove cavity. A No. 2 spring is provided between the push block and the inner end surface of the groove cavity. The push block is elastically abutted against the spring baffle. The side wall of the groove cavity is provided with a clamping assembly, and the clamping assembly can limit the push block in one direction.

[0016] According to a further technical solution, the clamping assembly includes a plurality of clamping blocks and a No. 3 spring, wherein the clamping blocks are slidably connected to the side walls of the groove cavity, the No. 3 spring is arranged between the clamping blocks and the inner wall of the groove cavity, and the other side of the clamping block facing away from the spring baffle is an inclined surface.

[0017] According to a further technical solution, the groove cavity is threadedly connected with an adjusting rod, and the adjusting rod abuts against one end of the No. 2 spring.

[0018] According to a further technical solution, the positioning assembly includes an annular groove, a rubber ring and a slider;

[0019] The inner end surface of the fixed tube is provided with an annular groove, a rubber ring is slidably connected in the annular groove, a slider is abutted on the outside of the rubber ring, the slider is slidably connected to the side wall of the fixed tube, and the inclined surface of the slider abuts against the spring baffle.

[0020] According to a further technical solution, the contact surface between the slider and the rubber ring is arc-shaped.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] The present invention provides a seismic-resistant single-channel large-diameter high-low pressure fracturing manifold, which connects and fixes an elastic support seat to the ground, and performs preliminary vibration reduction through the elastic support seat; when vibration occurs, a relative force is generated between the fixed pipe and the telescopic pipe, and at this time, the limiting component pushes the conical sleeve, and the conical sleeve elastically limits the connection seat, thereby absorbing the vibration force;

[0023] The present invention provides a seismic-resistant single-channel large-diameter high-low pressure fracturing manifold. When the elasticity of the conical sleeve of the limiting assembly decreases, the thrust mechanism can push the limiting assembly to approach the conical sleeve for tightening, thereby ensuring the limiting effect of the conical sleeve on the connecting seat; when the limiting assembly approaches the conical sleeve for tightening, the limiting assembly pushes the positioning assembly to clamp the telescopic tube, thereby avoiding the friction between the fixed tube and the telescopic tube to generate a gap, causing increased vibration;

[0024] The present invention provides a seismic-resistant single-channel large-diameter high- and low-pressure fracturing manifold, wherein the outer surface of the conical sleeve is an inclined surface. When the conical sleeve abuts against the connecting seat, not only can the fixed pipe and the telescopic pipe be limited and vibration-reduced in the axial direction of the fixed pipe and the telescopic pipe, but also the fixed pipe and the telescopic pipe can be limited in the cross-sectional direction of the fixed pipe and the telescopic pipe, thereby further avoiding mutual friction between the fixed pipe and the telescopic pipe.

[0025] The present invention provides a seismic-resistant single-channel large-diameter high- and low-pressure fracturing manifold. When vibration occurs, the clamping block rigidly abuts against the push block to prevent the vibration from pushing the push block to move, thereby causing the No. 2 spring to reciprocate and expand and contract, causing the No. 2 spring to elastically deform, effectively ensuring the elastic performance of the No. 2 spring; only when the No. 1 spring is fatigue-deformed and its elasticity decreases, the No. 2 spring pushes the push block, the push block moves down and is clamped with the next clamping block, and the push block pushes the spring baffle to compress the No. 1 spring, thereby ensuring the elastic performance of the No. 1 spring on the conical sleeve, and then ensuring the vibration reduction effect of the vibration reduction pipe group;

[0026] The present invention provides a seismic-resistant single-channel large-diameter high- and low-pressure fracturing manifold. By rotating the adjusting rod, the adjusting rod can push the No. 2 spring downward. By regularly adjusting the No. 2 spring, the elastic performance of the No. 2 spring is increased, so that the No. 2 spring can continuously maintain its adjustment ability. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural schematic diagram of the present invention;

[0028] Figure 2 It is a structural schematic diagram of the vibration damping pipe group;

[0029] Figure 3 It is a cross-sectional view of the vibration damping pipe group;

[0030] Figure 4 It is an enlarged schematic diagram of the internal structure of the shell;

[0031] Figure 5 for Figure 4 Schematic diagram of the enlarged structure of area A in the middle.

[0032] In the attached drawings: 1. Flange straight pipe; 2. Multi-way valve; 3. Manual plug valve; 4. Vibration damping pipe group; 5. Thrust mechanism; 51. No. 2 spring; 52. Push block; 53. Clamping assembly; 531. Clamping block; 532. No. 3 spring; 54. Adjusting rod; 6. Fixed pipe; 7. Telescopic pipe; 8. Limiting assembly; 81. No. 1 spring; 82. Spring baffle; 9. Positioning assembly; 91. Annular groove; 92. Rubber ring; 93. Sliding block; 10. Elastic support seat; 11. Shell sleeve; 12. Slide groove; 13. Connecting seat; 14. Guide rod; 15. Conical sleeve; 16. N-type flange; 17. Groove cavity. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0034] The specific implementation of the present invention is described in detail below in conjunction with specific embodiments.

[0035] like Figure 1-Figure 4 As shown, a seismic-resistant single-channel large-diameter high-low pressure fracturing manifold provided by the present invention includes a plurality of flange straight pipes 1, the working pressure of the flange straight pipes 1 can be 10000PS I-30000PS I, a multi-way valve 2 is connected between the flange straight pipes 1, a manual plug valve 3 is provided at the branch interface of the multi-way valve 2, the manual plug valve 3 is connected to a non-ferrous flange 16, and the non-ferrous flange 16 can be connected to a fracturing vehicle or an electric fracturing skid, and also includes:

[0036] A plurality of vibration-damping pipe groups 4, the vibration-damping pipe groups 4 are used to support the fracturing manifold as a whole, the vibration-damping pipe groups 4 are respectively fixedly connected to the multi-way valve 2 at the most side ends, the vibration-damping pipe groups 4 include a fixed pipe 6 and a telescopic pipe 7, the fixed pipe 6 is fixedly connected to an elastic support seat 10, the elastic support seat 10 is filled with vibration-absorbing material, and the telescopic pipe 7 is fixedly connected to the multi-way valve 2;

[0037] The fixed tube 6 is provided with a plurality of shells 11 in an annular shape, and a slide groove 12 is provided on the side wall of the fixed tube 6 facing the shells 11, and the telescopic tube 7 is fixedly connected with a plurality of connecting seats 13, and the connecting seats 13 are all slidably matched with the slide groove 12;

[0038] A guide rod 14 is fixedly connected to the shell 11, and the guide rod 14 passes through the connecting seat 13. Conical sleeves 15 are provided on both sides of the guide rod 14, and the conical sleeves 15 are slidably connected to the guide rod 14. A limiting component 8 is provided on one side of the conical sleeve 15, and the limiting component 8 can elastically limit the conical sleeve 15.

[0039] A thrust mechanism 5 is provided on one side of the limit assembly 8. When the elasticity of the limit assembly 8 to the tapered sleeve 15 decreases, the thrust mechanism 5 can push the limit assembly 8 toward the tapered sleeve 15 to tighten.

[0040] A positioning assembly 9 is provided between the fixed tube 6 and the telescopic tube 7 . When the limiting assembly 8 is approached and tightened toward the conical sleeve 15 , the limiting assembly 8 pushes the positioning assembly 9 to clamp the telescopic tube 7 .

[0041] Working principle:

[0042] The elastic support seat 10 is connected and fixed to the ground, and preliminary vibration reduction is performed through the elastic support seat 10; when vibration occurs, a relative force is generated between the fixed tube 6 and the telescopic tube 7, and at this time, the limiting component 8 pushes the conical sleeve 15, and the conical sleeve 15 elastically limits the connecting seat 13, thereby absorbing the vibration force;

[0043] Furthermore, when the elasticity of the tapered sleeve 15 of the limiting assembly 8 decreases, the thrust mechanism 5 can push the limiting assembly 8 toward the tapered sleeve 15 for tightening, thereby ensuring the limiting effect of the tapered sleeve 15 on the connecting seat 13; when the limiting assembly 8 is approaching the tapered sleeve 15 for tightening, the limiting assembly 8 pushes the positioning assembly 9 to clamp the telescopic tube 7, thereby avoiding the friction between the fixed tube 6 and the telescopic tube 7 to generate a gap, thereby causing increased vibration; further, the outer surface of the tapered sleeve 15 is an inclined surface, and when the tapered sleeve 15 abuts against the connecting seat 13, it can not only limit and reduce the vibration of the fixed tube 6 and the telescopic tube 7 in the axial direction of the fixed tube 6 and the telescopic tube 7, but also limit the fixed tube 6 and the telescopic tube 7 in the cross-sectional direction of the fixed tube 6 and the telescopic tube 7, thereby further avoiding the friction between the fixed tube 6 and the telescopic tube 7.

[0044] In the embodiment of the present invention, Figure 4 As shown, as a preferred embodiment of the present invention, the limiting assembly 8 includes a No. 1 spring 81 and a spring baffle 82, the No. 1 spring 81 is sleeved on the outside of the guide rod 14, one end of the No. 1 spring 81 abuts against the conical sleeve 15, and the other end of the No. 1 spring 81 abuts against the spring baffle 82, the spring baffle 82 is slidably connected to the inner wall of the shell sleeve 11, and a vibration-absorbing cotton strip is arranged between the No. 1 spring 81, the No. 1 spring 81 is limited by the spring baffle 82, and the No. 1 spring 81 elastically limits the conical sleeve 15.

[0045] In the embodiment of the present invention, Figure 5 As shown, as a preferred embodiment of the present invention, the thrust mechanism 5 includes a No. 2 spring 51, a push block 52 and a clamping assembly 53; the inner end surface of the shell 11 is provided with a groove cavity 17, and a push block 52 is slidably connected in the groove cavity 17, a No. 2 spring 51 is provided between the push block 52 and the inner end surface of the groove cavity 17, the push block 52 elastically abuts against the spring baffle 82, and the side wall of the groove cavity 17 is provided with a clamping assembly 53, and the clamping assembly 53 can unidirectionally limit the push block 52; the clamping assembly 53 includes a plurality of clamping blocks 531 and a No. 3 spring 532, the clamping blocks 531 are all slidably connected to the side wall of the groove cavity 17, the No. 3 spring 532 is arranged between the clamping block 531 and the inner wall of the groove cavity 17, and the other side of the clamping block 531 away from the spring baffle 82 is an inclined surface; the groove cavity 17 is threadedly connected with an adjusting rod 54, and the adjusting rod 54 abuts against one end of the No. 2 spring 51.

[0046] In the thrust mechanism 5, the No. 2 spring 51 pushes the push block 52, and the push block 52 elastically limits the spring baffle 82. When vibration occurs, the clamping block 531 rigidly abuts against the push block 52 to prevent the vibration from pushing the push block 52 to move, thereby causing the No. 2 spring 51 to reciprocate and expand and contract, causing the No. 2 spring 51 to elastically deform, effectively ensuring the elastic performance of the No. 2 spring 51; only when the No. 1 spring 81 is fatigue-deformed and its elasticity decreases, the No. 2 spring 51 pushes the push block 52, the push block 52 moves down and clamps with the next clamping block 531, and the push block 52 pushes the spring baffle 82 to compress the No. 1 spring 81, thereby ensuring the elastic performance of the No. 1 spring 81 on the conical sleeve 15, and then ensuring the vibration reduction effect of the vibration reduction tube group 4;

[0047] By rotating the adjusting rod 54, the adjusting rod 54 can push the No. 2 spring 51 to move downward. By regularly adjusting the No. 2 spring 51, the elastic performance of the No. 2 spring 51 is increased, so that the No. 2 spring 51 can continue to maintain its adjustment ability.

[0048] In the embodiment of the present invention, Figure 4 As shown, as a preferred embodiment of the present invention, the positioning assembly 9 includes an annular groove 91, a rubber ring 92 and a slider 93; the inner end surface of the fixed tube 6 is provided with an annular groove 91, a rubber ring 92 is slidably connected in the annular groove 91, a slider 93 is abutted on the outside of the rubber ring 92, the slider 93 is slidably connected to the side wall of the fixed tube 6, and the inclined surface of the slider 93 abuts against the spring baffle 82, and the contact surface between the slider 93 and the rubber ring 92 is arc-shaped;

[0049] In the positioning assembly 9, when the No. 1 spring 81 is fatigued and deformed and its elasticity decreases, the push block 52 pushes the spring baffle 82 to compress the No. 1 spring 81. At the same time, the spring baffle 82 pushes the slider 93, and the slider 93 pushes the rubber ring 92 to abut against the telescopic tube 7. The rubber ring 92 can avoid a large gap between the fixed tube 6 and the telescopic tube 7 due to friction, thereby increasing vibration; at the same time, the rubber ring 92 can absorb the horizontal vibration force of the telescopic tube 7, effectively ensuring the stability of the entire single-channel large-diameter high and low pressure fracturing manifold system.

[0050] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

[0051] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A seismic-resistant single-channel large-diameter high-low pressure fracturing manifold, comprising a plurality of flange straight pipes (1), wherein a multi-way valve (2) is connected between the flange straight pipes (1), a manual plug valve (3) is provided at the branch interface of the multi-way valve (2), and a non-ferrous flange (16) is connected to the manual plug valve (3), and the non-ferrous flange (16) can be connected to a fracturing vehicle or an electric fracturing skid, characterized in that: Also includes: A plurality of vibration-damping pipe groups (4), the vibration-damping pipe groups (4) being used to support the entire fracturing manifold, the vibration-damping pipe groups (4) being fixedly connected to the multi-way valves (2) at the most side ends, the vibration-damping pipe groups (4) comprising fixed pipes (6) and telescopic pipes (7), the fixed pipes (6) being fixedly connected to elastic support seats (10); The fixed tube (6) is provided with a plurality of shells (11) in an annular shape, and a slide groove (12) is provided on the side wall of the fixed tube (6) directly facing the shell (11), and the telescopic tube (7) is fixedly connected with a plurality of connecting seats (13), and the connecting seats (13) are slidably matched with the slide groove (12); A guide rod (14) is fixedly connected to the shell (11), the guide rod (14) passes through the connecting seat (13), conical sleeves (15) are arranged on both sides of the guide rod (14), the conical sleeves (15) are slidably connected to the guide rod (14), and a limiting component (8) is arranged on one side of the conical sleeve (15), and the limiting component (8) can elastically limit the conical sleeve (15); A thrust mechanism (5) is provided on one side of the limiting assembly (8), and when the elasticity of the limiting assembly (8) with respect to the conical sleeve (15) decreases, the thrust mechanism (5) can push the limiting assembly (8) toward the conical sleeve (15) to be tightened; A positioning assembly (9) is provided between the fixed tube (6) and the telescopic tube (7); when the limiting assembly (8) approaches and tightens the conical sleeve (15), the limiting assembly (8) pushes the positioning assembly (9) to clamp the telescopic tube (7); The limiting assembly (8) comprises a No. 1 spring (81) and a spring baffle (82), wherein the No. 1 spring (81) is sleeved outside the guide rod (14), one end of the No. 1 spring (81) abuts against the conical sleeve (15), and the other end of the No. 1 spring (81) abuts against the spring baffle (82), and the spring baffle (82) is slidably connected to the inner wall of the shell (11); The thrust mechanism (5) comprises a No. 2 spring (51), a thrust block (52) and a clamping assembly (53); The inner end surface of the shell (11) is provided with a groove cavity (17), a push block (52) is slidably connected in the groove cavity (17), a second spring (51) is provided between the push block (52) and the inner end surface of the groove cavity (17), the push block (52) is elastically abutted against the spring baffle (82), and a clamping assembly (53) is provided on the side wall of the groove cavity (17), and the clamping assembly (53) can limit the push block (52) in one direction; The positioning assembly (9) comprises an annular groove (91), a rubber ring (92) and a sliding block (93); The inner end surface of the fixed tube (6) is provided with an annular groove (91), a rubber ring (92) is slidably connected in the annular groove (91), a slider (93) is abutted against the outside of the rubber ring (92), the slider (93) is slidably connected to the side wall of the fixed tube (6), and the inclined surface of the slider (93) abuts against the spring baffle (82); When the No. 1 spring (81) is fatigue-deformed and its elasticity decreases, the push block (52) pushes the spring baffle (82) to compress the No. 1 spring (81), and at the same time, the spring baffle (82) pushes the slider (93), and the slider (93) pushes the rubber ring (92) to abut against the telescopic tube (7). The rubber ring (92) can prevent the gap between the fixed tube (6) and the telescopic tube (7) from being larger due to friction, thereby increasing vibration; at the same time, the rubber ring (92) can absorb the horizontal vibration force of the telescopic tube (7).

2. The seismic-resistant single-channel large-diameter high-low pressure fracturing manifold according to claim 1 is characterized in that: The clamping assembly (53) comprises a plurality of clamping blocks (531) and a number three spring (532), wherein the clamping blocks (531) are all slidably connected to the side wall of the groove cavity (17), and the number three spring (532) is arranged between the clamping blocks (531) and the inner wall of the groove cavity (17).

3. The seismic-resistant single-channel large-diameter high-low pressure fracturing manifold according to claim 1 is characterized in that: The groove cavity (17) is threadedly connected with an adjusting rod (54), and the adjusting rod (54) abuts against one end of the No. 2 spring (51).

4. The seismic-resistant single-channel large-diameter high-low pressure fracturing manifold according to claim 1 is characterized in that: The contact surface between the sliding block (93) and the rubber ring (92) is arc-shaped.

5. The seismic-resistant single-channel large-diameter high-low pressure fracturing manifold according to claim 2 is characterized in that: The other surface of the clamping block (531) facing away from the spring baffle (82) is an inclined surface.

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