Continuous fracturing fluid pumping device

Abstract

The utility model relates to a continuous fracturing fluid pumping device which comprises a conveying pipe communicated with high-viscosity fracturing fluid generating equipment and a double-head driving assembly capable of driving fracturing fluid to flow in the conveying pipe, and two conveying ports symmetrically distributed on the double-head driving assembly are respectively installed on two parallel branch pipes of the conveying pipe. The double-end driving assembly is used for alternately driving fracturing fluid in the two parallel branch pipes to be intermittently output in a time difference mode; a first one-way input valve located on the upstream of the double-end driving assembly and a second one-way output valve located on the downstream of the double-end driving assembly are arranged in a connecting port, in butt joint with the double-end driving assembly, of the parallel branch pipe. The device is simple in structure and convenient to maintain in the later period.

Description

Technical Field

[0001] The utility model relates to the technical field of fracturing fluid conveying equipment, in particular to a fracturing fluid continuous pumping device. Background Art

[0002] High-viscosity fracturing fluid has the advantages of high viscosity, low filtration loss, good cracking effect, easy gel breaking, and no residue, which makes the demand for high-viscosity fracturing fluid gradually increase, and the related preparation equipment and transportation equipment are also concerned. Compared with the use of clean water as fracturing fluid in the traditional oil and gas production construction process, the viscosity of high-viscosity fracturing fluid is relatively large. Although there are many gear pumps suitable for high-viscosity liquids, when the medium to be transported is corrosive, the corrosion-resistant materials required are expensive, and the relatively complex structure of the gear pump leads to the difficulty and cost of later maintenance, which greatly reduces the efficiency and safety of oil and gas production. Especially in actual work, in order to reduce the flow resistance, it is necessary to heat or insulate the medium to improve the pump's suction capacity. When the temperature difference between the rock mass and the fracturing fluid delivery pipe is large, the fracturing fluid and the underground material exchange heat, causing the fracturing fluid temperature to decrease, the viscosity to increase, the delivery resistance to increase, and even the delivery pipe to be blocked. In addition, since the fracturing fluid delivery drive module is the core component of the fracturing equipment, its performance directly affects the working performance of the entire fracturing equipment. Therefore, traditional fracturing fluid pumping equipment cannot achieve efficient and low-cost transportation and injection of high-viscosity fracturing fluid, and conventional high-pressure pumps have problems of high energy consumption, high cost and poor effect when directly used for the transportation of high-viscosity fracturing fluid, which seriously hinders the production and use of high-viscosity fracturing fluid. Therefore, there is an urgent need for a pumping device with low manufacturing cost, low maintenance difficulty and cost, and capable of efficiently and continuously transporting fracturing fluid. Utility Model Content

[0003] The utility model aims to provide a continuous pumping device for fracturing fluid which has a simple structure and is easy to maintain in the later stage, so as to solve the problems that existing pumping equipment such as gear pumps cannot efficiently and continuously transport high-viscosity fracturing fluid, and that existing pumping equipment has a complex structure and needs to use high-cost metal materials to produce internal accessories in order to improve corrosion resistance, which greatly increases production and maintenance costs and makes disassembly and maintenance more difficult.

[0004] The technical solution adopted by the utility model is: a continuous pumping device for fracturing fluid, comprising a delivery pipe connected to a high-viscosity fracturing fluid generating device and a double-head drive assembly capable of driving the fracturing fluid to flow in the delivery pipe, wherein two symmetrically arranged delivery ports of the double-head drive assembly are respectively installed on two parallel branches of the delivery pipe, so that the double-head drive assembly drives the intermittent output of the fracturing fluid in the two parallel branches alternately with a time difference; a first one-way input valve component located upstream of the double-head drive assembly and a second one-way output valve component located downstream of the double-head drive assembly are arranged in a connecting port where the parallel branch pipes are connected to the double-head drive assembly.

[0005] According to a preferred embodiment, the drive assembly includes a hollow cylinder, a central axis, a variable volume plug body and a rotational drive unit, wherein two ends of the hollow cylinder are respectively inserted into the tube bodies of two parallel branches to form a T-shaped variable volume chamber with the parallel branches, the central axis coinciding with its axis is passed through the hollow cylinder, and the end of the hollow cylinder is also provided with the rotational drive unit that can be transmission-connected to the central axis; the variable volume plug body threadedly connected to the central axis is sleeved on the central axis.

[0006] According to a preferred embodiment, a limiting groove that defines the plug-in position of the central axis is provided at the bottom of the inner cavity of the hollow cylinder, and a sealed bearing is embedded in the top of the hollow cylinder away from the limiting groove; the central axis extends to the outside of the hollow cylinder by passing through the sealed bearing, thereby being connected to the rotation drive unit.

[0007] According to a preferred embodiment, the hollow cylinder is a cylindrical body with a triangular, rectangular or hexagonal cross section, so as to define the translation direction of the variable volume plug body in cooperation with the central axis.

[0008] According to a preferred embodiment, the delivery pipe includes an input main pipe, an output main pipe and a parallel branch pipe, wherein the output end of the input main pipe is connected to the input ends of the two parallel branch pipes through a branch fork pipe; the output ends of the two parallel branch pipes connected to the same branch fork pipe are merged through the branch fork pipe and delivered to the output main pipe.

[0009] According to a preferred embodiment, the two sections of pipe bodies constituting the parallel branch pipes are symmetrically arranged along the axis of the hollow cylinder and installed on both sides of the hollow cylinder, so as to be connected with the inner cavity of the hollow cylinder, and the two parallel branches are respectively connected with the two sub-chambers of the hollow cylinder separated by the variable volume plug body.

[0010] According to a preferred embodiment, the first one-way input valve member is detachably installed in the tube body of the parallel branch pipe located upstream of the hollow cylinder; the second one-way output valve member is detachably installed in the tube body of the parallel branch pipe located downstream of the hollow cylinder.

[0011] According to a preferred embodiment, the first one-way input valve component includes a first narrowing tube shell, a first blocking trapezoidal block, a first limit spring and a first positioning mounting strip. The first narrowing tube shell is installed in the tube cavity of the parallel branch pipe in a coaxial manner, and its through inner cavity can be blocked by the first blocking trapezoidal block; the first limit spring that limits the working position of the first blocking trapezoidal block is installed for limiting position by the first positioning mounting strip horizontally placed in the parallel branch pipe.

[0012] According to a preferred embodiment, the second one-way output valve component includes a second narrowing tube shell, a second blocking trapezoidal block, a second limit spring and a second positioning mounting strip; the second narrowing tube shell is installed in the tube cavity of the parallel branch pipe in a coaxial manner, and its through inner cavity can be blocked by the second blocking trapezoidal block; the second limit spring that limits the working position of the second blocking trapezoidal block is installed for limiting position by the second positioning mounting strip placed horizontally in the parallel branch pipe.

[0013] According to a preferred embodiment, a guide installation groove for embedding and installing the first positioning installation strip and the second positioning installation strip is opened on the inner wall of the tube cavity of the parallel branch pipe.

[0014] The beneficial effects of the utility model are:

[0015] The double-headed drive assembly provided in the present application can cooperate with the first one-way input valve component and the second one-way output valve component to drive the two parallel branches to alternately deliver high-viscosity fracturing fluid, so that the delivery pipe can continuously and efficiently output high-viscosity fracturing fluid. The double-headed drive assembly provided in the present application completes the driving of the fracturing fluid by means of suction and extrusion, which simplifies the pumping structure while ensuring the effective driving of the fracturing fluid, making the pumping structure simpler and more reliable, facilitating the reduction of production costs and maintenance costs, and also reducing the difficulty and complexity of disassembly and assembly. The first one-way input valve component and the second one-way output valve component provided in the present application can cooperate with the double-headed drive assembly to form a pump-in structure and a pump-out structure, thereby facilitating the suction and pumping of the fracturing fluid, and the setting of the two sets of parallel structures facilitates the synchronous conversion of the pump-in and pump-out states to maintain continuous drive and delivery, thereby ensuring the continuity of delivery. The first one-way input valve component and the second one-way output valve component provided in the present application have a relatively simple elastically adjustable valve structure, which is convenient for disassembly and maintenance and replacement of parts, thereby reducing the maintenance cost and difficulty to a certain extent, and thus cooperating with each other to achieve efficient and continuous delivery of fracturing fluid, thereby improving the injection efficiency of the fracturing fluid and improving the efficiency and safety of oil and gas extraction. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of a preferred continuous pumping device for fracturing fluid proposed by the utility model;

[0017] Figure 2 It is a structural schematic diagram of a preferred continuous pumping device for fracturing fluid proposed by the utility model, in which the upper sub-chamber of the hollow cylinder shrinks and the fracturing fluid is pumped out;

[0018] Figure 3 It is a structural schematic diagram of a preferred fracturing fluid continuous pumping device proposed by the utility model, in which the upper sub-chamber of the hollow cylinder is expanded and the fracturing fluid is pumped in;

[0019] Figure 4 This is a structural schematic diagram of a first one-way input valve member of a preferred fracturing fluid continuous pumping device proposed by the utility model;

[0020] Figure 5 It is a structural schematic diagram of a second one-way output valve component of a preferred fracturing fluid continuous pumping device proposed by the utility model.

[0021] Reference numerals list

[0022] 1: delivery pipe; 2: double-head drive assembly; 3: first one-way input valve member; 4: second one-way output valve member; 11: input main pipe; 12: output main pipe; 13: parallel branch pipe; 14: diversion fork pipe; 21: hollow cylinder; 22: central axis; 23: variable volume plug body; 24: rotary drive unit; 25: fixed plate; 31: first narrowing tube shell; 32: first blocking trapezoidal block; 33: first limit spring; 34: first positioning mounting strip; 41: second narrowing tube shell; 42: second blocking trapezoidal block; 43: second limit spring; 44: second positioning mounting strip; 131: guide mounting groove; 211: limit groove platform; 212: sealing bearing. DETAILED DESCRIPTION

[0023] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the utility model will be briefly introduced below in combination with the drawings and the descriptions of the embodiments or the prior art. Obviously, the following descriptions of the structures of the drawings are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] The technical solution provided by the present invention will be described in detail below by way of examples with reference to the accompanying drawings. It should be noted that the description of these examples is used to help understand the present invention, but does not constitute a limitation of the present invention. In some examples, some implementation methods are not described or are not described in detail because they belong to existing or conventional technologies.

[0025] In addition, the technical features recorded in this article, or the steps in all methods or processes disclosed, except for mutually exclusive features and / or steps, can also be combined in any suitable manner in one or more embodiments. For those skilled in the art, it is easy to understand that the steps or operation sequence of the methods related to the embodiments provided herein can also be changed. Any order in the drawings and embodiments is only for illustrative purposes and does not imply a requirement to follow a certain order unless it is explicitly stated that a certain order is required.

[0026] The serial numbers assigned to the components herein, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned in this application, under reasonable circumstances (not constituting a self-contradiction), include direct and indirect connections (couplings).

[0027] The following is a detailed description with reference to the accompanying drawings.

[0028] Example 1

[0029] The present application provides a fracturing fluid continuous pumping device, which includes a delivery pipe 1 , a double-head drive assembly 2 , a first one-way input valve component 3 , and a second one-way output valve component 4 .

[0030] according to Figure 1-5 In a specific embodiment shown, the input end of the delivery pipe 1 is connected to a high-viscosity fracturing fluid generating device. A double-head drive assembly 2 capable of driving the fracturing fluid to flow in the delivery pipe 1 is installed on the input pipe 1. The two symmetrically arranged delivery ports of the double-head drive assembly 2 are respectively installed on the two parallel branches 13 of the delivery pipe 1, so that the double-head drive assembly 2 alternately drives the intermittent output of the fracturing fluid in the two parallel branches 13 in a time difference manner. A first one-way input valve component 3 located upstream of the double-head drive assembly 2 and a second one-way output valve component 4 located downstream of the double-head drive assembly 2 are arranged in the connection port where the parallel branch 13 is connected to the double-head drive assembly 2, so that the first one-way input valve component 3 and the second one-way output valve component 4 cooperate to realize the pumping in and out process of the fracturing fluid by the double-head drive assembly 2. The double-headed drive assembly 2 provided in the present application can cooperate with the first one-way input valve component 3 and the second one-way output valve component 4 to drive the two parallel branches 13 to alternately transport high-viscosity fracturing fluid, so that the delivery pipe 1 can continuously and efficiently output high-viscosity fracturing fluid. The double-headed drive assembly 2 provided in the present application completes the driving of the fracturing fluid by means of suction and extrusion, which simplifies the pumping structure while ensuring the effective driving of the fracturing fluid, making the pumping structure simpler and more reliable, facilitating the reduction of production costs and maintenance costs, and also reducing the difficulty and complexity of disassembly and assembly. The first one-way input valve component 3 and the second one-way output valve component 4 provided in the present application can cooperate with the double-headed drive assembly 2 to form a pumping structure and a pumping structure, thereby facilitating the suction and pumping of the fracturing fluid, and the setting of the two sets of parallel structures facilitates the synchronous conversion of the pumping-in and pumping-out states to maintain continuous drive and delivery, thereby ensuring the continuity of delivery. The first one-way input valve component 3 and the second one-way output valve component 4 provided in the present application have a relatively simple elastic adjustable valve structure, which is convenient for disassembly and maintenance and replacement of parts, thereby reducing the maintenance cost and difficulty to a certain extent, thereby cooperating with each other to achieve efficient and continuous delivery of fracturing fluid, thereby improving the injection efficiency of the fracturing fluid and improving the efficiency and safety of oil and gas extraction.

[0031] Preferably, the delivery pipe 1 includes an input main pipe 11, an output main pipe 12 and a parallel branch pipe 13. Preferably, the output end of the input main pipe 11 is connected to the input ends of the two parallel branch pipes 13 through a flow splitting fork pipe 14. Preferably, the output ends of the two parallel branch pipes 13 connected to the same flow splitting fork pipe 14 are merged through the flow splitting fork pipe 14 and further delivered to the output main pipe 12. Preferably, the two sections of the pipe body constituting the parallel branch pipe 13 are symmetrically arranged along the axis of the hollow cylinder 21 and installed on both sides of the hollow cylinder 21, so as to be connected to the inner cavity of the hollow cylinder 21. Further preferably, the two parallel branch pipes 13 are respectively connected to the two sub-chambers of the hollow cylinder 21 separated by the variable volume plug body 23, so as to complete the alternating delivery of the fracturing fluid in the two parallel branch pipes 13 following the volume change of the two sub-chambers of the hollow cylinder 21. Preferably, the parallel branch pipe 13 is provided with a first one-way input valve member 3 detachably mounted in the tube body upstream of the hollow cylinder 21. Preferably, the parallel branch pipe 13 is provided with a second one-way output valve member 4 detachably mounted in the tube body downstream of the hollow cylinder 21. Preferably, a guide installation groove 131 for embedding and installing the first positioning installation strip 34 and the second positioning installation strip 44 is provided on the inner wall of the tube cavity of the parallel branch pipe 13. Preferably, a positioning screw is provided in the guide installation groove 131, so that the position of the second positioning installation strip 44 in the guide installation groove 131 is limited by the positioning screw penetrating the tube wall of the parallel branch pipe 13, and the positioning screw is moved out of the guide installation groove 131 by screwing it, so as to realize the translation movement of the second positioning installation strip 44 in the guide installation groove 131.

[0032] Preferably, the drive assembly 2 includes a hollow cylinder 21, a central axis 22, a variable volume plug body 23 and a rotation drive unit 24. Preferably, the two ends of the hollow cylinder 21 are respectively inserted into the tube bodies of the two parallel branches 13 to form a T-shaped variable volume chamber with the parallel branches 13. Preferably, a central axis 22 coinciding with its axis is passed through the hollow cylinder 21. Further preferably, a rotation drive unit 24 capable of being transmission-connected to the central axis 22 is also provided at the end of the hollow cylinder 21. Preferably, a variable volume plug body 23 threadedly connected to the central axis 22 is sleeved on the central axis 22 so that the variable volume plug body 23 can follow the rotation of the central axis 22 and translate along the axial direction of the hollow cylinder 21, thereby changing the volume size of the two sub-chambers of the hollow cylinder 21 separated by the variable volume plug body 23. Preferably, a limit groove 211 for limiting the insertion position of the central axis 22 is provided at the bottom of the inner cavity of the hollow cylinder 21. Preferably, a sealed bearing 212 is embedded on the top of the hollow cylinder 21 away from the limiting groove 211. Preferably, the central axis 22 extends to the outside of the hollow cylinder 21 by passing through the sealed bearing 212, so as to be connected to the motion output end of the rotation drive unit 24 installed on the top of the hollow cylinder 21 through the fixing plate 25. Further preferably, the hollow cylinder 21 is a cylindrical body with a triangular, rectangular or hexagonal cross-section to limit the translation direction of the variable volume plug body 23 in cooperation with the central axis 22. The contact surface between the drive structure provided in the present application and the high-viscosity fracturing fluid is relatively smooth and has a small contact area, especially the complex mechanical parts can be kept separated from the high-viscosity fracturing fluid, avoiding corrosion by the high-viscosity fracturing fluid and improving the service life. The pumping of high-viscosity fracturing fluid is driven by a streamlined variable chamber structure, especially the continuous pumping structure achieved by alternating dual-chamber pumping. This ensures the pumping efficiency while greatly reducing the probability of internal structure corrosion. The simplified structure facilitates later disassembly and assembly and early production of parts, thereby reducing production costs while shortening maintenance time costs, improving availability and the feasibility of mass production.

[0033] Preferably, the first one-way input valve member 3 comprises a first narrowing tube shell 31, a first blocking trapezoidal block 32, a first limit spring 33 and a first positioning installation strip 34. Preferably, the first narrowing tube shell 31 is installed in the tube cavity of the parallel branch pipe 13 in a coaxial manner. Preferably, the through inner cavity of the first narrowing tube shell 31 can be blocked by the first blocking trapezoidal block 32. Further preferably, the first limit spring 33 that limits the working position of the first blocking trapezoidal block 32 is limitedly installed by the first positioning installation strip 34 transversely placed in the parallel branch pipe 13, so as to limit the initial state of the first blocking trapezoidal block 32 blocking the through inner cavity of the first narrowing tube shell 31.

[0034] Preferably, the second one-way output valve member 4 includes a second narrowing tube shell 41, a second blocking trapezoidal block 42, a second limit spring 43, and a second positioning installation strip 44. Preferably, the second narrowing tube shell 41 is installed in the lumen of the parallel branch 13 in a coaxial manner, and its through lumen can be blocked by the second blocking trapezoidal block 42. Further preferably, the second limit spring 43 that limits the working position of the second blocking trapezoidal block 42 is limitedly installed by a second positioning installation strip 44 placed horizontally in the parallel branch 43. The first one-way input valve member 3 and the second one-way output valve member 4 provided in the present application can cooperate with each other to alternately open and close, so as to complete the one-way pumping of the fracturing fluid when the volume of the sub-chamber of the drive assembly 2 changes.

[0035] The working principle of this application is:

[0036] The two parallel branches 13 are respectively connected to different sub-chambers of the hollow cylinder 21. Specifically, when the variable volume plug 23 moves upward, the upper sub-chamber shrinks, and at this time, the first one-way input valve member 3 connected to the upper sub-chamber is closed by the gradually increasing pressure in the upper sub-chamber, and at the same time, the second one-way output valve member 4 connected to the upper sub-chamber is pushed open by the gradually increasing pressure in the upper sub-chamber, so that the fracturing fluid in the upper sub-chamber is discharged outward through the second one-way output valve member 4, that is, the fracturing fluid pumping process of the upper sub-chamber is completed.

[0037] During the above movement process, the lower sub-chamber expands, and negative pressure is formed in the lower sub-chamber, forcing the first blocking trapezoidal block 32 of the first one-way input valve component 3 and the second blocking trapezoidal block 42 of the second one-way output valve component 4 to move toward the inner cavity direction close to the lower sub-chamber under the action of negative pressure, so that the first one-way input valve component 3 opens and the second one-way output valve component 4 closes, so that the fracturing fluid in the input main pipe 11 flows into the lower sub-chamber through the diversion fork pipe 14 and the first one-way input valve component 3, thereby realizing the fracturing fluid pumping process of the lower sub-chamber.

[0038] When the variable volume plug body 23 moves downward, the upper sub-chamber expands and the lower sub-chamber shrinks, so that the working states of the first one-way input valve component 3 and the second one-way output valve component 4 connected to the two sub-chambers are replaced, thereby completing the pumping of the upper sub-chamber and the pumping out of the lower terminal chamber, so that the upper sub-chamber and the lower sub-chamber alternately drive the fracturing fluid in the two parallel branches 13 for transportation, thereby realizing the continuous pumping out of the output main pipe 12.

[0039] The present utility model is not limited to the above optional implementation modes. Anyone can derive other various forms of products under the inspiration of the present utility model. However, no matter what changes are made in the shape or structure, all technical solutions that fall within the scope of the claims of the present utility model fall within the protection scope of the present utility model. Those skilled in the art should understand that the present utility model specification and its drawings are illustrative and do not constitute limitations on the claims. The protection scope of the present utility model is defined by the claims and their equivalents. Throughout the text, the features guided by "preferably" are only an optional method and should not be understood as having to be set. Therefore, the applicant reserves the right to abandon or delete the relevant preferred features at any time.

Claims

1. A continuous pumping device for fracturing fluid, comprising a delivery pipe (1) connected to a high-viscosity fracturing fluid generating device and a double-head drive assembly (2) capable of driving the fracturing fluid to flow in the delivery pipe (1), characterized in that: The two symmetrically arranged delivery ports of the double-head drive assembly (2) are respectively installed on the two parallel branches (13) of the delivery pipe (1), so that the double-head drive assembly (2) alternately drives the two parallel branches (13) to intermittently deliver the fracturing fluid in a time-difference manner; A first one-way input valve component (3) located upstream of the dual-head drive component (2) and a second one-way output valve component (4) located downstream of the dual-head drive component (2) are arranged in a connection port where the parallel branch pipe (13) is connected to the dual-head drive component (2).

2. The continuous pumping device for fracturing fluid according to claim 1, characterized in that: The driving assembly (2) comprises a hollow cylinder (21), a central shaft (22), a variable volume plug body (23) and a rotation driving unit (24), wherein: The two ends of the hollow cylinder (21) are respectively inserted into the tube bodies of the two parallel branch pipes (13) to form a T-shaped variable volume chamber with the parallel branch pipes (13); the middle shaft (22) coincident with the axis thereof is passed through the hollow cylinder (21); and the end of the hollow cylinder (21) is also provided with the rotation drive unit (24) capable of transmission connection with the middle shaft (22); The central shaft (22) is sleeved with the variable volume plug body (23) which is threadedly connected thereto.

3. The continuous pumping device for fracturing fluid according to claim 2, characterized in that: A limiting groove (211) for limiting the insertion position of the central axis (22) is provided at the bottom of the inner cavity of the hollow cylinder (21), and a sealing bearing (212) is embedded at the top of the hollow cylinder (21) away from the limiting groove (211); The central shaft (22) extends to the outside of the hollow cylinder (21) by passing through the sealed bearing (212), thereby being connected to the rotary drive unit (24).

4. The continuous pumping device for fracturing fluid according to claim 3, characterized in that: The hollow cylinder (21) is a cylindrical body with a triangular, rectangular or hexagonal cross section, which cooperates with the central axis (22) to limit the translation direction of the variable volume plug body (23).

5. The continuous pumping device for fracturing fluid according to claim 4, characterized in that: The delivery pipe (1) comprises an input main pipe (11), an output main pipe (12) and parallel branch pipes (13), wherein: The output end of the input main pipe (11) is connected to the input ends of the two parallel branch pipes (13) via a branching fork pipe (14); The output ends of the two parallel branch pipes (13) connected to the same branch fork pipe (14) are merged through the branch fork pipe (14) and transported to the output main pipe (12).

6. The continuous pumping device for fracturing fluid according to claim 5, characterized in that: The two sections of the tube body constituting the parallel branch pipe (13) are symmetrically arranged along the axis of the hollow cylinder (21) and installed on both sides of the hollow cylinder (21), thereby communicating with the inner cavity of the hollow cylinder (21), and the two parallel branch pipes (13) are respectively communicated with the two sub-chambers of the hollow cylinder (21) separated by the variable volume plug body (23).

7. The continuous pumping device for fracturing fluid according to claim 6, characterized in that: The first one-way input valve member (3) is detachably mounted in the pipe body of the parallel branch pipe (13) located upstream of the hollow cylinder (21); The second one-way output valve member (4) is detachably mounted in the pipe body of the parallel branch pipe (13) located downstream of the hollow cylinder (21).

8. The continuous pumping device for fracturing fluid according to claim 7, characterized in that: The first one-way input valve component (3) comprises a first narrowing tube shell (31), a first blocking trapezoidal block (32), a first limit spring (33) and a first positioning mounting strip (34). The first narrowing tube shell (31) is installed in the tube cavity of the parallel branch tube (13) in a coaxial manner, and its through inner cavity can be blocked by the first blocking trapezoidal block (32); The first limit spring (33) that limits the working position of the first blocking trapezoidal block (32) is installed in a limit position via the first positioning installation strip (34) that is transversely placed in the parallel branch pipe (13).

9. The continuous pumping device for fracturing fluid according to claim 8, characterized in that: The second one-way output valve member (4) comprises a second narrowing tube shell (41), a second blocking trapezoidal block (42), a second limit spring (43) and a second positioning mounting strip (44). The second narrowing tube shell (41) is installed in the tube cavity of the parallel branch tube (13) in a coaxial manner, and its through inner cavity can be blocked by the second blocking trapezoidal block (42); The second limit spring (43) that limits the working position of the second blocking trapezoidal block (42) is installed in a limit position via the second positioning installation strip (44) that is transversely placed in the parallel branch pipe (13).

10. The continuous pumping device for fracturing fluid according to claim 9, characterized in that: The inner wall of the tube cavity of the parallel branch pipe (13) is provided with a guide installation groove (131) for embedding and installing the first positioning installation strip (34) and the second positioning installation strip (44).

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