Double-pumping low-pressure liquid supply device

Abstract

The utility model discloses a double-pumping low-pressure liquid supply device, which relates to the technical field of shale gas fracturing, and comprises a regulation and control component, and the regulation and control component comprises a regulation mechanism and a control valve mechanism. The adjusting assembly can synchronously adjust and control parameters such as opening, closing and opening degrees of the two liquid inlet pipeline control valves, use is convenient, adjustment and control are rapid, the two control valves can be synchronously increased or decreased in a fixed proportion, the adjusting assembly can adapt to the fracturing fluid prepared by mixing different liquids according to a certain proportion, and the use effect is good. Meanwhile, the two control valves can still be independently opened and closed, so that the liquid supply device can be suitable for being used in different construction environments, and the problems that two channel valves of existing liquid supply equipment can only be independently regulated and controlled, the opening degrees of the valves need to be adjusted and matched one by one according to the proportion of different liquids, steps are troublesome, and precision is poor are solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of shale gas fracturing, and more specifically, particularly relates to a double-pump low-pressure liquid supply device. Background Art

[0002] Shale gas is a natural gas resource available for exploitation in shale layers. Shale gas is an unconventional natural gas found in reservoir rock systems dominated by organic-rich shales. Hydraulic fracturing is one of the important technical means for shale gas development. The fracturing fluid is pumped into the formation through the fluid supply equipment after being pressurized by the high-pressure pumping equipment, thereby opening and extending cracks in the formation, thereby realizing the shale gas exploitation operation.

[0003] As for the existing fluid supply equipment used in shale gas fracturing, although it can achieve the mixed use of multiple liquids, its two channel valves can only be regulated separately, and the proportions of different liquids also need to be adjusted one by one by the valve opening, which has poor accuracy, cumbersome use, and low practicality. Utility Model Content

[0004] The disclosed embodiment relates to a dual-pump low-pressure liquid supply device, which has an adjustment component. The adjustment component can realize synchronous regulation of parameters such as opening, closing and opening degree of two liquid inlet pipeline control valves. It is easy to use and quick to regulate. The two control valves can realize synchronous increase or decrease of a certain proportion for use, and can adapt to the use of different proportions of liquids to mix and prepare fracturing fluid. At the same time, the two control valves can still be opened and closed separately, and can be used in different construction environments. It has strong flexibility, adaptability and practicality.

[0005] In a first aspect of the present disclosure, a dual-pump low-pressure liquid supply device is provided, comprising a pipeline assembly, wherein the pipeline assembly comprises a converging pipeline, a liquid discharge pipeline and two liquid inlet pipelines, wherein the two liquid inlet pipelines are fixedly installed on one side of the converging pipeline, and the liquid discharge pipeline is fixedly installed on the other side of the converging pipeline; and further comprising a regulating assembly, wherein the regulating assembly comprises a regulating mechanism and a valve control mechanism;

[0006] The adjustment mechanism includes a mounting seat, an adjustment rod, a retaining frame and a friction transmission wheel. The mounting seat is fixedly mounted on the top of the liquid inlet pipe, and the adjustment rod is rotatably connected to the inside of the mounting seat. The retaining frame is inserted into the inside of the mounting seat, and the friction transmission wheel is rotatably connected to the outside of the retaining frame.

[0007] The valve control mechanism includes a friction control wheel and a single control rod, wherein the friction control wheel is rotatably connected to the inside of the mounting seat, and the single control rod is inserted into the inside of the friction control wheel;

[0008] The insides of the two liquid inlet pipes are both provided with control valves for controlling the on-off and opening degree of the fluid inside the pipes, and the valve stems of the control valves are exposed inside the liquid inlet pipes.

[0009] In at least some embodiments, the valve control mechanism is provided with two groups, and the two groups of valve control mechanisms are symmetrically arranged inside the mounting seat, and the friction control wheel, the single control rod and the valve stem are located on the same rotation axis.

[0010] In at least some embodiments, the wheel body cross-section of the friction control wheel is of trapezoidal design, and the two friction control wheels are staggered and symmetrical with each other, and the two sides of the friction transmission wheel are respectively driven by friction with the wheel bodies of the two friction control wheels.

[0011] In at least some embodiments, the rod body of the adjusting rod is provided with threads on the outside, and the adjusting rod is screwed to the inside of the retaining frame through the threads of the rod body.

[0012] In at least some embodiments, a synchronous top spring is provided inside the single control rod, and two ends of the synchronous top spring respectively abut against the inside of the single control rod and the inside of the valve stem.

[0013] In at least some embodiments, a synchronization gear is provided at the bottom of the single control rod, and synchronization grooves are provided at the top of the valve stem and the bottom of the friction control wheel. The synchronization gear is always inserted into the synchronization groove of the valve stem, and under the action of the synchronization top spring, when the single control rod is not pressed by external force, the synchronization gear is inserted into the synchronization groove of the friction control wheel.

[0014] Compared with the prior art, the utility model has the following beneficial effects:

[0015] The regulating component can realize synchronous regulation of parameters such as opening, closing and opening degree of the two liquid inlet pipeline control valves. It is easy to use and quick to regulate. The two control valves can realize synchronous increase or decrease of a fixed proportion, which can adapt to the use of different liquid ratios to mix and make fracturing fluid. At the same time, the two control valves can still be opened and closed separately, which can be used in different construction environments, thus improving the flexibility, adaptability and practicality of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the utility model.

[0017] Figure 2 It is a schematic diagram of the internal structure of the utility model.

[0018] Figure 3 It is a structural schematic diagram of the utility model after the regulating component is disassembled.

[0019] Figure 4 This utility model Figure 3 Schematic diagram of the structure at the bottom.

[0020] Figure 5It is a schematic diagram of the internal structure when the single control rod of the right valve control mechanism of the utility model is pressed.

[0021] In the figure, the corresponding relationship between the component names and the figure numbers is as follows:

[0022] 1. Pipeline assembly; 101. Liquid inlet pipeline; 1011. Valve stem; 102. Converging pipeline; 103. Liquid discharge pipeline;

[0023] 2. Adjustment mechanism; 201. Mounting seat; 202. Adjustment rod; 203. Cage; 204. Friction drive wheel;

[0024] 3. Valve control mechanism; 301. Friction control wheel; 3011. Synchronous tooth groove; 302. Single control rod; 3021. Synchronous top spring; 3022. Synchronous gear. DETAILED DESCRIPTION

[0025] The implementation of the utility model is further described in detail below in conjunction with the drawings and examples.

[0026] As attached Figure 1 To Attachment Figure 5 As shown:

[0027] Embodiment 1: The utility model provides a dual-pump low-pressure liquid supply device, including a pipeline assembly 1, the pipeline assembly 1 includes a converging pipeline 102, a liquid discharge pipeline 103 and two liquid inlet pipelines 101, the two liquid inlet pipelines 101 are fixedly installed on one side of the converging pipeline 102, and the liquid discharge pipeline 103 is fixedly installed on the other side of the converging pipeline 102; and also includes a regulating assembly, the regulating assembly includes a regulating mechanism 2 and a valve control mechanism 3;

[0028] The adjusting mechanism 2 includes a mounting seat 201, an adjusting rod 202, a retaining frame 203 and a friction transmission wheel 204. The mounting seat 201 is fixedly mounted on the top of the liquid inlet pipe 101, and the adjusting rod 202 is rotatably connected to the inside of the mounting seat 201, the retaining frame 203 is inserted into the inside of the mounting seat 201, and the friction transmission wheel 204 is rotatably connected to the outside of the retaining frame 203;

[0029] The valve control mechanism 3 includes a friction control wheel 301 and a single control rod 302. The friction control wheel 301 is rotatably connected to the inside of the mounting seat 201, and the single control rod 302 is inserted into the inside of the friction control wheel 301.

[0030] The two liquid inlet pipes 101 are both provided with control valves for controlling the on-off and opening degree of the fluid inside the pipes, and the valve stems 1011 of the control valves are exposed from the inside of the liquid inlet pipes 101 .

[0031] In the embodiment of the present disclosure, two groups of control valve mechanisms 3 are provided, and the two groups of control valve mechanisms 3 are symmetrically arranged inside the mounting seat 201, and the friction control wheel 301, the single control rod 302 and the valve stem 1011 are on the same rotation axis. In use, the regulating component can synchronously control the use status of the control valves of the two liquid inlet pipelines 101. When the friction control wheel 301 of any group of control valve mechanisms 3 is rotated, the friction control wheel 301 of the group of control valve mechanisms 3 can drive the valve stem 1011 of the liquid inlet pipeline 101 to rotate under the cooperation of the synchronous gear 3022 and the synchronous tooth groove 3011, thereby realizing the liquid inlet pipeline 101. The friction control wheel 301 is designed to be trapezoidal in cross section, and the two friction control wheels 301 are staggered and symmetrical with each other, and the two sides of the friction transmission wheel 204 are respectively driven by the wheel bodies of the two friction control wheels 301 through friction. At the same time, the friction transmission wheel 204 can drive the friction control wheel 301 of another group of control valve mechanisms 3 to rotate through friction transmission, so that when the friction control wheel 301 of the other group of control valve mechanisms 3 rotates, it can drive the various use parameters of the control valve of another liquid inlet pipeline 101, and the two control valves can be synchronously regulated and used, which is convenient to operate and flexible to use.

[0032] In the embodiment of the present disclosure, the rod body of the adjusting rod 202 is provided with a thread on the outside, and the adjusting rod 202 is screwed to the inside of the retaining frame 203 through the rod body thread. In use, the liquid inlet ratio of the two liquid inlet pipes 101 can be changed by changing the use position of the friction transmission wheel 204. Since the cross-section of the two friction control wheels 301 is designed to be trapezoidal, when the adjusting rod 202 is rotated, the adjusting rod 202 can drive the retaining frame 203 and the friction transmission wheel 204 to move up and down to change the use position through the rod body thread. The change in the use position of the friction transmission wheel 204 changes the transmission ratio between the two friction transmission wheels 204. Therefore, when controlling the control valve, the two control valves can rotate at different ratios, that is, the liquid inlet amount per unit time of the two liquid inlet pipes 101, that is, the liquid inlet ratio, can be changed, and the proportion of different types of fracturing fluids can be used, which has strong adaptability.

[0033] In the embodiment of the present disclosure, a synchronous top spring 3021 is provided inside the single control rod 302, and the two ends of the synchronous top spring 3021 are respectively against the inside of the single control rod 302 and the inside of the valve stem 1011, a synchronous gear 3022 is provided at the bottom of the single control rod 302, and the top of the valve stem 1011 and the bottom of the friction control wheel 301 are both provided with a synchronous tooth groove 3011, the synchronous gear 3022 is always plugged into the inside of the synchronous tooth groove 3011 of the valve stem 1011, and under the action of the synchronous top spring 3021, when the single control rod 302 is not pressed by an external force, the synchronous gear 3022 is plugged into the inside of the synchronous tooth groove 3011 of the friction control wheel 301, and in use, the two control The valve can also be used for individual regulation to adapt to regulation in different construction environments. When it is necessary to control the opening and closing state and other parameters of a control valve individually, it is only necessary to press and turn the single control rod 302 of the group control valve mechanism 3. When the single control rod 302 is pressed, it will move downward and compress the synchronous top spring 3021, and when the single control rod 302 moves downward, the synchronous gear 3022 will escape from the synchronous tooth groove 3011 of the friction control wheel 301 of the group control valve mechanism 3. Therefore, the single control rod 302 can only drive the control valve at its bottom to rotate to achieve regulation, and the other control valve will not change the use state. The adjustment is convenient, which further improves the practicality of the device.

[0034] The specific usage and function of this embodiment are as follows:

[0035] In the utility model, two different liquids are connected to two liquid inlet pipes 101 respectively, and then the discharge pipe 103 is connected to the fracturing pipe. Then, the liquid can be pumped into the confluence pipe 102 by a double pump, and then discharged from the discharge pipe 103 to realize the fracturing and mining of shale gas. The regulating component can synchronously control the use status of the control valves of the two liquid inlet pipes 101. When the friction control wheel 301 of any group of control valve mechanisms 3 is rotated, the friction control wheel 301 of the group of control valve mechanisms 3 can cooperate with the synchronous gear 3022 and the synchronous tooth groove 3011 when rotating. The valve stem 1011 of the liquid inlet pipeline 101 is driven to rotate, thereby realizing the opening and closing of the control valve of the liquid inlet pipeline 101. At the same time, the friction transmission wheel 204 can drive the friction control wheel 301 of another group of control valve mechanisms 3 to rotate through friction transmission, so that when the friction control wheel 301 of another group of control valve mechanisms 3 rotates, it can drive the various use parameters of the control valve of another liquid inlet pipeline 101. The two control valves can be regulated and used synchronously. By changing the use position of the friction transmission wheel 204, the liquid inlet ratio of the two liquid inlet pipelines 101 can be changed. The cross section of the control wheel 301 is designed to be trapezoidal, so that when the adjusting rod 202 is rotated, the adjusting rod 202 can drive the retaining frame 203 and the friction transmission wheel 204 to move up and down to change the use position through the rod body thread. The change of the use position of the friction transmission wheel 204 changes the transmission ratio between the two friction transmission wheels 204. Therefore, when the control valve is controlled, the two control valves can be rotated at different ratios, that is, the liquid inlet volume per unit time of the two liquid inlet pipelines 101, that is, the liquid inlet ratio, can be changed, and the proportion of different types of fracturing fluids can be used. The two control valves can also be used separately. It is used for regulation and control to adapt to the regulation and control in different construction environments. When it is necessary to control the opening and closing state and other parameters of a control valve separately, it is only necessary to press and turn the single control rod 302 of the group control valve mechanism 3. When the single control rod 302 is pressed, it will move downward and compress the synchronous top spring 3021, and when the single control rod 302 moves downward, the synchronous gear 3022 will escape from the synchronous tooth groove 3011 of the friction control wheel 301 of the group control valve mechanism 3, so that the single control rod 302 can only drive the control valve at its bottom to rotate to achieve regulation, and the other control valve will not change the use state.

[0036] In this article, there are a few points to note:

[0037] 1. The drawings of the embodiments of the present disclosure only involve structures related to the embodiments of the present disclosure, and other structures may refer to general designs.

[0038] 2. In the absence of conflict, the embodiments of the present disclosure and the features therein may be combined with each other to obtain new embodiments.

[0039] The above are only specific embodiments of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present disclosure, which should be included in the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be based on the protection scope of the claims.

Claims

1. A dual-pump low-pressure liquid supply device, comprising: A pipeline assembly (1), the pipeline assembly (1) comprising a confluence pipeline (102), a liquid discharge pipeline (103) and two liquid inlet pipelines (101), the two liquid inlet pipelines (101) being fixedly installed on one side of the confluence pipeline (102), and the liquid discharge pipeline (103) being fixedly installed on the other side of the confluence pipeline (102); characterized in that: it also comprises a regulating assembly, the regulating assembly comprising a regulating mechanism (2) and a valve control mechanism (3); The adjusting mechanism (2) comprises a mounting seat (201), an adjusting rod (202), a retaining frame (203) and a friction transmission wheel (204); the mounting seat (201) is fixedly mounted on the top of the liquid inlet pipe (101), and the adjusting rod (202) is rotatably connected to the inside of the mounting seat (201); the retaining frame (203) is plugged into the inside of the mounting seat (201), and the friction transmission wheel (204) is rotatably connected to the outside of the retaining frame (203); The valve control mechanism (3) comprises a friction control wheel (301) and a single control rod (302); the friction control wheel (301) is rotatably connected to the inside of the mounting seat (201), and the single control rod (302) is plugged into the inside of the friction control wheel (301); The two liquid inlet pipes (101) are each provided with a control valve for controlling the on-off and opening degree of the fluid inside the pipe, and the valve stem (1011) of the control valve is exposed from the inside of the liquid inlet pipe (101).

2. A double-pump low-pressure liquid supply device as claimed in claim 1, characterized in that: The valve control mechanism (3) is provided with two groups, and the two groups of valve control mechanisms (3) are symmetrically arranged inside the mounting seat (201), and the friction control wheel (301), the single control rod (302) and the valve stem (1011) are located on the same rotation axis.

3. A double-pump low-pressure liquid supply device as claimed in claim 2, characterized in that: The wheel body cross-section of the friction control wheel (301) is of trapezoidal design, and the two friction control wheels (301) are staggered and symmetrical with each other, and the two sides of the friction transmission wheel (204) are respectively driven by friction with the wheel bodies of the two friction control wheels (301).

4. A double-pump low-pressure liquid supply device as claimed in claim 3, characterized in that: The rod body of the adjusting rod (202) is provided with threads on the outside, and the adjusting rod (202) is screwed to the inside of the retaining frame (203) through the rod body threads.

5. A double-pump low-pressure liquid supply device as claimed in claim 4, characterized in that: A synchronous top spring (3021) is provided inside the single control rod (302), and two ends of the synchronous top spring (3021) respectively abut against the inside of the single control rod (302) and the inside of the valve stem (1011).

6. A double-pump low-pressure liquid supply device as claimed in claim 5, characterized in that: The bottom of the single control rod (302) is provided with a synchronous gear (3022), and the top of the valve stem (1011) and the bottom of the friction control wheel (301) are both provided with synchronous tooth grooves (3011), the synchronous gear (3022) is always inserted into the synchronous tooth groove (3011) of the valve stem (1011), and under the action of the synchronous top spring (3021), when the single control rod (302) is not pressed by external force, the synchronous gear (3022) is inserted into the synchronous tooth groove (3011) of the friction control wheel (301).

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