A labor-saving fracturing valve and its usage method

Abstract

The present invention relates to the technical field of oil and gas development equipment, and specifically to a labor-saving fracturing valve and its usage method. Among them, the labor-saving fracturing valve includes: a valve body, a housing is arranged on the valve body, a buffer cavity is arranged on the housing, and a pressure-changing component is arranged on the buffer cavity; a lifting member is also arranged in the valve body, and an opening valve mechanism is arranged on the lifting member. The opening valve mechanism includes an elastic deflection component and a driving component. The elastic deflection component includes a deflection member. The driving component is connected to a turntable rotatably installed on the buffer cavity. By rotating the turntable, the driving component can drive the deflection member to deflect relative to the lifting member. When the deflection member deflects beyond the critical position, the deflection member will quickly perform automatic deflection and drive the driving component to continue to act at the same time; a triggering component is arranged in the valve body and cooperates with the deflection member, and can drive a valve plug arranged in the valve body to rotate relative to the valve body. When the valve plug rotates, it can drive the pressure-changing component to change the accommodation space in the housing.

Description

Technical Field

[0001] The present invention relates to the technical field of oil and gas development equipment, and particularly to a labor-saving fracturing valve and its usage method. Background Art

[0002] Oil, the black pearl on the earth, has been used by humans since ancient times. From the torch lighting in ancient times to the modern high-tech petrochemical industry, oil has played an important role in the history of human development. And to extract oil from underground to the ground, a series of complex processes and equipment are required.

[0003] When conducting oil extraction, it is necessary to first conduct an investigation of the underground environment to determine the location of the oil, and analyze the underground structure and the situation of the oil reservoir; after the analysis is completed, use drilling equipment to drill underground until reaching the oil storage layer. After the drilling is completed, the oil in the reservoir can be collected. There are many ways of oil production, including natural oil production, fracturing, and water injection oil production, etc. Water injection oil production is to inject water into the reservoir to increase the reservoir pressure, making it easier for the oil to flow out of the wellhead.

[0004] After the oil well has been produced for a certain stage, the production capacity and permeability decrease. In order to enhance the oil drainage capacity and increase the oil well production, people have invented the fracturing process technology. The fracturing methods are divided into two categories: hydraulic fracturing and high-energy gas fracturing. Hydraulic fracturing is to inject fluid into the well at high speed by a ground high-pressure pump truck group, and rely on the high pressure built up at the bottom of the well to cause the oil layer rock to break and generate cracks; as a key equipment for fracturing operations in oil and gas wells and shale gas development, the fracturing valve can control the on-off of the pipeline during fracturing operations, and thus achieve zipper-like operations. The current fracturing valves include manual fracturing valves and hydraulic fracturing valves. The manual fracturing valve has disadvantages such as too large a switching torque, a large number of switching turns, and being time-consuming and laborious to switch. Moreover, when using a manual fracturing valve to control the on-off of the pipeline, the operation is slow when the pipeline is closed, so the possibility of oil spilling out of the pipeline will increase, resulting in waste of oil during the extraction process. At the same time, immediately after the valve is closed, the injected fluid will have a certain impact on the valve plug. The accumulation of impacts over a long time will affect the valve plug, and then affect the on-off control of the pipeline by the valve plug, thus affecting the oil extraction operation. Summary of the Invention

[0005] The purpose of the present invention is to provide a labor-saving fracturing valve and its usage method to solve the problems raised in the above background art.

[0006] To achieve the above purpose, the present invention provides the following technical solutions:

[0007] A labor-saving fracturing valve, comprising:

[0008] Valve body, a housing is provided on the valve body, a buffer chamber is provided on the housing, and a voltage conversion component is provided on the buffer chamber;

[0009] A lifting member is further provided in the valve body, and an opening valve mechanism is provided on the lifting member. The opening valve mechanism includes an elastic deflection component and a driving component. The elastic deflection component includes a deflection member. The driving component is connected to a turntable rotatably installed on the buffer chamber. By rotating the turntable, the driving component can drive the deflection member to deflect relative to the lifting member. When the deflection member deflects past a critical position, the deflection member will quickly deflect automatically, and at the same time drive the driving component to continue to act;

[0010] A trigger component is provided in the valve body and cooperates with the deflection member, and can drive a valve plug provided in the valve body to rotate relative to the valve body. When the valve plug rotates, it can drive the voltage conversion component to change the accommodation space in the housing.

[0011] The labor-saving fracturing valve as described above: The voltage conversion component includes a lead screw rotatably installed on the buffer chamber. A threaded sleeve threadedly connected to the lead screw is provided on the lead screw. The threaded sleeve is connected to a pushing member slidably provided in the buffer chamber through a connecting rod.

[0012] The labor-saving fracturing valve as described above: The pushing member includes a push rod slidably provided in the buffer chamber. A piston disc is coaxially provided at one end of the push rod immersed in the buffer chamber, and the push rod is inserted into a socket cylinder provided on the buffer chamber.

[0013] The labor-saving fracturing valve as described above: The deflection member includes a deflection sleeve rotatably installed on the lifting member. A telescopic rod is slidably provided in the deflection sleeve. One end of the telescopic rod away from the deflection sleeve is connected to the rotation center of the deflection sleeve through a spring, and a trigger rod is provided at one end of the deflection sleeve away from the telescopic rod.

[0014] The labor-saving fracturing valve as described above: The elastic deflection component further includes a deflection rod rotatably installed on the lifting member. One end of the deflection rod away from its rotation center is rotatably connected to one end of the telescopic rod away from the deflection sleeve.

[0015] The labor-saving fracturing valve as described above: The driving component includes a rotating rod installed on the lifting member. The rotating rod is connected to the deflection sleeve through a moving member, and one end of the rotating rod away from the valve plug is coaxially connected to the turntable through a driving rod.

[0016] The labor-saving fracturing valve as described above: The moving member includes a moving sleeve sleeved on the rotating rod. The moving sleeve is connected to the deflecting sleeve through a hinge rod. A protruding column is formed on the inner wall of the moving sleeve, and a fixed sleeve is arranged on the outer wall of the moving sleeve. The protruding column is slidably arranged in a spiral groove formed on the rotating rod, and the fixed sleeve is slidably connected to a guide rod fixedly arranged on the lifting member.

[0017] The labor-saving fracturing valve as described above: The triggering assembly includes a triggering structure and a linkage structure. The triggering structure includes a triggering disk rotatably installed on the lifting member. The triggering disk cooperates with the triggering rod and includes a blocking block and a notch groove, and the triggering disk is connected to the rotating shaft of the valve plug through a bevel gear set.

[0018] The labor-saving fracturing valve as described above: The linkage structure includes a main gear rotatably installed on the valve body. A second transmission wheel is coaxially arranged on the rotating shaft of the main gear. The second transmission wheel is connected to a first transmission wheel coaxially arranged on the rotating shaft of the valve plug through a transmission belt. The main gear meshes with a driven gear rotatably installed on the valve body, and the driven gear is connected to the lead screw through a linkage belt.

[0019] A method for using a labor-saving fracturing valve is also proposed. A labor-saving fracturing valve as claimed in the above claims is adopted, and it includes the following steps:

[0020] Step 1: In the initial state, the valve body is in an open state. When closing the valve body, rotate the turntable, and the driving assembly will pull the deflecting member to deflect towards the valve plug. Until the deflecting member crosses the critical position, continue to apply a little force to the turntable, and the deflecting member will quickly deflect automatically.

[0021] Step 2: The automatically deflected deflecting member will, in cooperation with the triggering assembly, drive the valve plug to quickly close the valve body, and at the same time drive the pressure-changing assembly to act, increasing the accommodating space in the housing, so as to slow down the impact of the liquid in the housing on the valve plug when the valve body is instantaneously closed.

[0022] Compared with the prior art, the beneficial effects of the present invention are:

[0023] By setting up a valve opening mechanism and utilizing the cooperation between the driving component and the elastic deflection component, the closing or opening operation of the valve body is divided into two parts: manual and automatic adjustment. In the manual driving process, the operator needs to continuously apply an external force to drive the turntable to rotate. This process can prevent accidental touch and avoid the turntable being driven to rotate due to accidental touch during use. When the turntable enters the automatic adjustment process, there is no need for the operator to apply an external force. The elastic deflection component will automatically act quickly. During this process, the elastic deflection component cooperates with the triggering component, which can drive the valve plug to quickly rotate by ninety degrees for closing operation, thereby quickly cutting off the connection between the housing and the pipeline, reducing the possibility of oil overflowing from the pipeline to the housing, and avoiding waste of oil during the exploitation process.

[0024] When the valve plug is closing, the linkage structure arranged on the lifting component will drive the lead screw to continuously rotate, so as to drive the push rod to pull the piston disk for a pulling action. During this process, the piston disk performing the pumping operation will quickly pump the water flowing into the housing into the buffer cavity. Under the pumping operation of the piston disk, the internal accommodation space of the housing increases. By using the cooperation between the two, the impact force of the water flow on the valve plug can be reduced, thereby extending the service life of the valve plug. Brief Description of the Drawings

[0025] Figure 1 It is a schematic structural diagram of a labor-saving fracturing valve.

[0026] Figure 2 It is a schematic structural diagram of the valve body in the labor-saving fracturing valve.

[0027] Figure 3 It is a schematic structural diagram of an internal cross-sectional view on one side of the valve body in the labor-saving fracturing valve.

[0028] Figure 4 It is a schematic structural diagram of an internal cross-sectional view on the other side of the valve body in the labor-saving fracturing valve.

[0029] Figure 5 It is a schematic structural diagram of the connection between the triggering structure and the valve plug in the labor-saving fracturing valve.

[0030] Figure 6 It is a schematic structural diagram of the valve opening mechanism in the labor-saving fracturing valve.

[0031] Figure 7 It is a schematic structural diagram of the triggering disk in the labor-saving fracturing valve.

[0032] Figure 8 It is a schematic structural diagram of the driving structure in the labor-saving fracturing valve.

[0033] Figure 9 It is a schematic structural diagram of the connection between the moving part and the elastic deflection component in the labor-saving fracturing valve.

[0034] Figure 10It is a schematic diagram of the structure of the deflection member in the labor-saving fracturing valve.

[0035] Figure 11 This is a structural schematic diagram of the cooperation between the pressure-changing assembly and the buffer chamber in a labor-saving fracturing valve.

[0036] Figure 12 This is a schematic diagram of the structure inside the buffer chamber in a labor-saving fracturing valve.

[0037] Figure 13 This is a schematic diagram of the structure of the pusher in the labor-saving fracturing valve.

[0038] Figure 14 It is a schematic diagram of the structure of the sleeve in the labor-saving fracturing valve.

[0039] In the figure: 1, valve body; 101, upper port; 102, lower port; 2, housing; 3, buffer chamber; 301, receiving plate; 4, turntable; 5, screw rod; 6, threaded sleeve; 7, push rod; 701, slot; 8, linkage belt; 9, main gear; 10, slave gear; 11, lifting piece; 12, valve plug; 1201, through hole; 13, drive rod; 14, rotating rod; 1401, spiral groove; 15, bevel gear set; 16, trigger Plate; 1601, blocking block; 1602, notch groove; 17, first transmission wheel; 18, second transmission wheel; 19, movable sleeve; 1901, protruding column; 1902, fixed sleeve; 20, guide rod; 21, hinged rod; 22, deflection sleeve; 2201, slide groove; 23, trigger rod; 24, spring; 25, deflection rod; 26, telescopic rod; 2601, slider; 27, connecting rod; 28, socket tube; 2801, block. DETAILED DESCRIPTION

[0040] Various exemplary embodiments, features and aspects of the present application will be described in detail below with reference to the accompanying drawings. The same reference numerals in the accompanying drawings represent elements with the same or similar functions. Although various aspects of the embodiments are shown in the accompanying drawings, the drawings are not necessarily drawn to scale unless otherwise specified.

[0041] The word “exemplary” is used exclusively herein to mean “serving as an example, example, or illustration.” Any embodiment described herein as “exemplary” is not necessarily to be construed as preferred or advantageous over other embodiments.

[0042] In addition, in order to better illustrate the present application, numerous specific details are provided in the specific embodiments below. It should be understood by those skilled in the art that the present application can also be implemented without certain specific details. In some examples, methods, means, and elements well known to those skilled in the art are not described in detail in order to highlight the subject matter of the present application.

[0043] See also Figures 1 - 14, in an embodiment of the present invention, a labor-saving fracturing valve includes:

[0044] A valve body 1, a housing 2 is provided on the valve body 1, a buffer chamber 3 is provided on the housing 2, and a pressure-changing component is provided on the buffer chamber 3;

[0045] Exemplarily, please refer to Figure 1 、 Figure 2 , upper and lower ends of the above-mentioned valve body 1 are respectively provided with an upper port 101 and a lower port 102, the upper port 101 and the lower port 102 are coaxially arranged, the lower port 102 of the valve body 1 is connected to a pipeline buried underground and reaching underground flowing resources (including underground oil and underground gas), the upper port 101 of the valve body 1 is communicated with the inside of the housing 2, and one end of the housing 2 away from the valve body 1 is connected to a pumping device. When collecting underground resources, it is necessary to first monitor the underground environment, infer the location of the oil, and then start drilling to open a channel from the oil to the ground. After the drilling is completed, use the pipeline to extend into the channel and reach the oil, and then connect the valve body 1 and the housing 2 to the pipeline. When the position of the valve body 1 is fixed, first start the pumping device, and then open the valve body 1. The pumping device during the working process will inject water into the reservoir through the valve body 1, the housing 2 and the pipeline to increase the reservoir pressure, so that the oil can flow out of the wellhead more easily;

[0046] During the mining process, when the valve body 1 is suddenly closed, the water flow injected into the valve body 1 through the housing 2 by the pumping device will impact the valve plug 12 in the valve body 1 due to its own stored potential energy. This impact is similar to the "water hammer effect". Long-term impact will affect the valve plug 12 and cause the valve plug 12 to leak. In order to avoid this leakage and maintain the tightness of the valve plug 12, when the valve plug 12 is suddenly closed, the internal space of the buffer chamber 3 can be expanded through the pressure-changing component, so that the accommodating space of the housing 2 is increased, thereby reducing the impact force of the water flow on the valve plug 12.

[0047] Specifically, the pressure-changing component includes a lead screw 5 rotatably arranged on the buffer chamber 3, a threaded sleeve 6 threadedly connected to the lead screw 5, and the threaded sleeve 6 is connected to a pushing member slidably arranged in the buffer chamber 3 through a connecting rod 27;

[0048] In detail, please refer to Figure 1 、 Figure 11 、 Figure 12 , both ends of the above-mentioned lead screw 5 are rotatably connected to two sets of receiving plates 301 provided on the buffer chamber 3, and the above-mentioned connecting rod 27 is arranged in a similar "L" shape and penetrates through the receiving plate 301. When the lead screw 5 performs continuous same-direction movement, the threaded sleeve 6 moves along the axial direction of the lead screw 5 under the cooperation between the connecting rod 27 and the receiving plate 301, thereby driving the pushing member to move relative to the buffer chamber 3, and further changing the accommodating space in the housing 2.

[0049] The pushing member includes a push rod 7 slidably disposed in the buffer chamber 3. One end of the push rod 7 inserted into the buffer chamber 3 is coaxially provided with a piston disc, and the push rod 7 is inserted into a socket cylinder 28 provided on the buffer chamber 3;

[0050] Preferably, please refer to Figure 11 , Figure 12 , Figure 13 , Figure 14 , two groups of card slots 701 are equidistantly arranged on the outer wall of the push rod 7 along the circumferential direction thereof. The socket cylinder 28 is coaxial with the buffer chamber 3, and two groups of clamping blocks 2801 are equidistantly arranged on the inner wall of the socket cylinder 28 along the circumferential direction thereof. The clamping blocks 2801 are slidably disposed in the card slots 701, so that the push rod 7 can only move along the axial direction of the buffer chamber 3. Particularly, the piston disc is in sealing sliding connection with the inner wall of the buffer chamber 3 to prevent the liquid entering the housing 2 from flowing out of the buffer chamber 3;

[0051] In the initial state, the valve plug 12 is opened, and the piston disc is close to the housing 2. At this time, the capacity of the housing 2 is the smallest, and the water flow rate injected into the housing 2 and the valve body 1 via the pumping device will be relatively fast. Subsequently, the pressure flowing into the reservoir through the pipeline will be relatively large. When the valve plug 12 of the valve body 1 is suddenly closed, the lead screw 5 will rotate quickly in the same direction, and then drive the threaded sleeve 6 to drive the push rod 7 to move along the axial direction of the buffer chamber 3 away from the housing 2. During this process, the piston disc performing the pumping will quickly pump the water flow into the housing 2 into the buffer chamber 3, and increase the inner cavity of the housing 2 under the pumping operation of the piston disc. With the cooperation between the two, the impact force of the water flow on the valve plug 12 can be reduced, thereby prolonging the service life of the valve plug 12; at the same time, quickly closing the valve plug 12 can quickly cut off the housing 2 and the pipeline, reduce the possibility of oil overflowing from the pipeline to the housing 2, and avoid waste of oil during the mining process; similarly, when the valve plug 12 is opened, the lead screw 5 rotates quickly in the reverse direction, driving the piston disc back to the initial position, so that the water flow can be injected into the reservoir at a high-speed flow state.

[0052] Furthermore, please refer to Figure 3 , Figure 4 , Figure 6 , Figure 8 , Figure 9 , Figure 10, a lifting member 11 is further provided in the valve body 1, and a valve opening mechanism is provided on the lifting member 11. The valve opening mechanism includes an elastic deflection assembly and a driving assembly. The elastic deflection assembly includes a deflection member. The driving assembly is connected to a turntable 4 rotatably installed on the buffer chamber 3. By rotating the turntable 4, the driving assembly can drive the deflection member to deflect relative to the lifting member 11. When the deflection member deflects beyond the critical position, the deflection member will quickly deflect automatically, and at the same time drive the driving assembly to continue to act;

[0053] For details, please refer to Figure 3 、 Figure 4 , a containing cavity and a flow cavity are provided in the above-mentioned valve body 1. The lifting member 11 is arranged in the containing cavity. The valve plug 12 is rotatably installed in the flow cavity in a conical sealing manner. The valve plug 12 of this shape cooperates with the valve body 1, having the characteristics of compact structure and small torque. A through hole 1201 is provided on the valve plug 12, and the through hole 1201 cooperates with the upper port 101 and the lower port 102 to conduct or block the valve body 1.

[0054] The deflection member includes a deflection sleeve 22 rotatably installed on the lifting member 11. A telescopic rod 26 is slidably arranged in the deflection sleeve 22. One end of the telescopic rod 26 away from the deflection sleeve 22 is connected to the rotation center of the deflection sleeve 22 through a spring 24, and a trigger rod 23 is arranged at the end of the deflection sleeve 22 away from the telescopic rod 26;

[0055] For details, please refer to Figure 6 、 Figure 9 、 Figure 10 , sliding grooves 2201 are provided on the left and right sides of the above-mentioned deflection sleeve 22, and sliding blocks 2601 are provided on the left and right sides of the telescopic rod 26. The sliding blocks 2601 are slidably arranged in the sliding grooves 2201, so that the telescopic rod 26 does not move away from the deflection sleeve 22.

[0056] The elastic deflection assembly further includes a deflection rod 25 rotatably installed on the lifting member 11. One end of the deflection rod 25 away from its rotation center is rotatably connected to one end of the telescopic rod 26 away from the deflection sleeve 22;

[0057] The driving assembly includes a rotating rod 14 installed on the lifting member 11. The rotating rod 14 is connected to the deflection sleeve 22 through a moving member, and one end of the rotating rod 14 away from the valve plug 12 is coaxially connected to the turntable 4 through a driving rod 13;

[0058] The movable member includes a movable sleeve 19 sleeved on the rotating rod 14, the movable sleeve 19 is connected to the deflection sleeve 22 via a hinge rod 21, and a protruding column 1901 is formed on the inner wall of the movable sleeve 19, and a fixed sleeve 1902 is arranged on the outer wall of the movable sleeve 19, the protruding column 1901 is slidably arranged in a spiral groove 1401 provided on the rotating rod 14, and the fixed sleeve 1902 is slidably connected to a guide rod 20 fixedly arranged on the lifting member 11;

[0059] Preferably, please combine Figure 4 , Figure 6 , Figure 9 The spiral groove 1401 is opened counterclockwise around the rotating rod 14 (refer to Figure 6 ,and Figure 6 The deflection sleeve 22 is shown in a critical position). In the initial state, taking the valve body 1 in the open state as an example, the deflection sleeve 22 is deflected toward the turntable 4. At this time, the telescopic rod 26 is retracted in the deflection sleeve 22, and the pulling amount of the spring 24 is minimal. When the valve body 1 needs to be opened, the turntable 4 is rotated clockwise, and then the driving rod 13 that rotates synchronously with the turntable 4 drives the rotating rod 14 to rotate synchronously. In this process, the protruding column 1901 cooperates with the spiral groove 1401 to force the movable sleeve 19 to move toward the valve plug 12 along the axial direction of the rotating rod 14;

[0060] During the movement of the movable sleeve 19, the deflection sleeve 22 connected to the movable sleeve 19 through the fixed-length hinged rod 21 will deflect toward the valve plug 12 under the pull of the movable sleeve 19. During the deflection, due to the limitation of the fixed-length deflection rod 25, the telescopic rod 26 will gradually move toward the outside of the deflection sleeve 22 during the deflection process, thereby gradually increasing the pulling amount of the spring 24. Until the deflection sleeve 22 deflects to be perpendicular to the guide rod 20, the deflection sleeve 22 reaches the critical position, and the elastic potential energy stored in the spring 24 reaches the maximum. Then, the force continues to be applied. Driven by the rotating disk 4 and the movable sleeve 19, the deflection sleeve 22 will pass the critical position, and then, without applying force, the deflection sleeve 22 will rapidly drive the deflection sleeve 22 to continue to deflect due to the release of elastic potential energy by the spring 24. During the deflection, the telescopic rod 26 will retract into the deflection sleeve 22. At the same time, the deflection sleeve 22 will drive the movable sleeve 19 to continue to move toward the valve plug 12 under the connection of the hinge rod 21. In this process, due to the cooperation between the protruding column 1901 and the spiral groove 1401, the rotating rod 14 will continue to drive the rotating disk 4 to rotate clockwise;

[0061] The above valve opening process includes two processes: manual driving and automatic adjustment. In the manual driving process, the operator needs to continuously apply an external force to drive the turntable 4 to rotate. This process can prevent accidental touch and avoid the turntable 4 being driven to rotate due to accidental touch during use. When the turntable 4 enters the automatic adjustment process, there is no need for the operator to apply an external force. The deflecting sleeve 22 that rotates rapidly automatically will drive the valve plug 12 to rotate quickly by ninety degrees under the cooperation of the triggering component, closing the valve body 1. During the closing process, the lead screw 5 will rotate quickly, driving the piston disk back to the initial position close to the housing 2 so that the water flow can be injected into the reservoir in a state of high-speed flow.

[0062] Furthermore, a labor-saving fracturing valve further includes a triggering component. The triggering component is arranged in the valve body 1 and cooperates with the deflecting part to be able to drive the valve plug 12 arranged in the valve body 1 to rotate relative to the valve body 1. When the valve plug 12 rotates, it can drive the pressure-changing component to change the accommodation space in the housing 2.

[0063] The triggering component includes a triggering structure and a linkage structure. The triggering structure includes a triggering disk 16 rotatably mounted on the lifting part 11. The triggering disk 16 cooperates with the triggering rod 23 and includes a blocking block 1601 and a notch groove 1602. The triggering disk 16 is connected to the rotating shaft of the valve plug 12 through a bevel gear set 15.

[0064] Specifically, please refer to Figure 5 , the above bevel gear set 15 includes a first bevel gear and a second bevel gear. The first bevel gear is coaxially connected to the rotating shaft of the valve plug 12, and the second bevel gear is coaxially connected to the rotating shaft of the triggering disk 16.

[0065] Exemplarily, in the embodiment of the present invention, the deflection angle of the deflecting sleeve 22 is set to one hundred and twenty degrees. Therefore, the arc angle corresponding to the notch groove 1602 is sixty degrees. Correspondingly, the radius of the second bevel gear is 1.5 times the radius of the first bevel gear, so that when the triggering disk 16 is driven to rotate sixty degrees in the same direction by the triggering rod 23, it can just drive the first bevel gear to rotate ninety degrees, and then drive the valve plug 12 to perform the on or off operation (the ratio of the radii of the first bevel gear and the second bevel gear is affected by the deflection angle of the deflecting sleeve 22, and the proportional coefficient can enable the triggering disk 16 to drive the valve plug 12 to rotate ninety degrees when rotating).

[0066] In detail, in combination with Figure 6, the trigger rod 23 is located on the notch groove 1602 and fits against one end face of the baffle block 1601. Combining the above, when manually driving the turntable 4 to rotate and driving the deflection sleeve 22 to deflect, the trigger rod 23 will slide on the notch groove 1602. When the deflection sleeve 22 crosses the critical position, the trigger rod 23 will slide along the notch groove 1602 to fit against the other end face of the baffle block 1601. Subsequently, the deflection sleeve 22 that enters the automatic deflection will drive the trigger rod 23 to maintain a rapid counterclockwise rotation. During this process, the trigger rod 23 will drive the trigger disc 16 to rotate rapidly counterclockwise. During the rotation process, the second bevel gear and the first bevel gear enter the meshing transmission state, which will drive the valve plug 12 to rotate by ninety degrees, quickly closing the valve body 1 to prevent the backflow of oil.

[0067] Furthermore, the linkage structure includes a main gear 9 rotatably installed on the valve body 1. A second transmission wheel 18 is coaxially arranged on the rotating shaft of the main gear 9. The second transmission wheel 18 is connected to a first transmission wheel 17 coaxially arranged on the rotating shaft of the valve plug 12 through a transmission belt. And the main gear 9 meshes with a driven gear 10 rotatably installed on the valve body 1. The driven gear 10 is connected to the lead screw 5 through a linkage belt 8;

[0068] Preferably, refer to Figure 5 , the radius of the above first transmission wheel 17 is multiple times that of the second transmission wheel 18, so that when the first transmission wheel 17 follows the valve plug 12 to rotate by ninety degrees, it can drive the main gear 9 to rotate multiple circles. And the radius of the above main gear 9 is multiple times that of the driven gear 10, so that when the main gear 9 rotates one circle, it can drive the driven gear 10 to rotate multiple circles;

[0069] Combining the above, with the cooperation between the bevel gear set 15 and the first transmission wheel 17 and the second transmission wheel 18, when the valve plug 12 performs a rapid closing operation, it drives the lead screw 5 to rotate multiple circles, and then drives the push rod 7 to expand the accommodation space in the housing 2, thereby reducing the impact force of the water flow in the housing 2 on the valve plug 12 and increasing the service life of the valve body 1.

[0070] A method for using a labor-saving fracturing valve is also proposed. Using a labor-saving fracturing valve as described in claim 1 above, it includes the following steps:

[0071] Step 1: In the initial state, the valve body 1 is in the open state. When closing the valve body, rotate the turntable 4, and the driving assembly will pull the deflecting member to deflect towards the valve plug 12 until the deflecting member crosses the critical position. Then, apply a little more force to the turntable 4, and the deflecting member will quickly perform automatic deflection;

[0072] Step 2: The deflecting part with automatic deflection will, under the cooperation of the triggering component, drive the valve plug 12 to quickly close the valve body 1, and at the same time drive the voltage conversion component to act, increasing the internal storage space of the housing 2, so as to slow down the impact of the liquid in the housing 2 on the valve plug 12 when the valve body 1 is instantaneously closed.

[0073] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and without departing from the spirit or basic characteristics of the present invention, the present invention can be implemented in other specific forms. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present invention. Any reference signs in the claims should not be construed as limiting the claims involved.

[0074] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A labor-saving fracturing valve, characterized in that: include: A valve body (1), wherein a shell (2) is arranged on the valve body (1), a buffer chamber (3) is arranged on the shell (2), and a voltage transformer assembly is arranged on the buffer chamber (3); A lifting member (11) is also provided in the valve body (1), and a valve opening mechanism is provided on the lifting member (11), and the valve opening mechanism comprises an elastic deflection assembly and a driving assembly, wherein the elastic deflection assembly comprises a deflection member, and the driving assembly is connected to a rotating disk (4) rotatably mounted on the buffer chamber (3), and by rotating the rotating disk (4), the driving assembly can drive the deflection member to deflect relative to the lifting member (11), and when the deflection member deflects beyond a critical position, the deflection member will automatically deflect rapidly and drive the driving assembly to continue to move; a trigger assembly, arranged in the valve body (1) and cooperating with the deflection member, capable of driving a valve plug (12) arranged in the valve body (1) to rotate relative to the valve body (1), and when the valve plug (12) rotates, it can drive the voltage-changing assembly to change the accommodation space in the housing (2); The voltage transformation assembly comprises a screw rod (5) rotating on the buffer chamber (3), the screw rod (5) being provided with a threaded sleeve (6) threadedly connected thereto, the threaded sleeve (6) being connected to a pushing member slidably arranged in the buffer chamber (3) via a connecting rod (27); The deflection member comprises a deflection sleeve (22) rotatably mounted on the supporting member (11), a telescopic rod (26) being slidably arranged in the deflection sleeve (22), an end of the telescopic rod (26) away from the deflection sleeve (22) being connected to the rotation center of the deflection sleeve (22) via a spring (24), and a trigger rod (23) being arranged at an end of the deflection sleeve (22) away from the telescopic rod (26).

2. A labor-saving fracturing valve according to claim 1, characterized in that: The pushing member comprises a pushing rod (7) slidably arranged in the buffer cavity (3), one end of the pushing rod (7) immersed in the buffer cavity (3) is coaxially provided with a piston disc, and the pushing rod (7) is inserted into a sleeve (28) provided on the buffer cavity (3).

3. A labor-saving fracturing valve according to claim 1, characterized in that: The elastic deflection assembly further comprises a deflection rod (25) rotatably mounted on the supporting member (11), wherein one end of the deflection rod (25) away from its rotation center is rotatably connected to one end of the telescopic rod (26) away from the deflection sleeve (22).

4. A labor-saving fracturing valve according to claim 3, characterized in that: The driving assembly comprises a rotating rod (14) mounted on the supporting member (11), the rotating rod (14) being connected to the deflection sleeve (22) via a moving member, and an end of the rotating rod (14) away from the valve plug (12) being coaxially connected to the rotating disk (4) via a driving rod (13).

5. A labor-saving fracturing valve according to claim 4, characterized in that: The movable member comprises a movable sleeve (19) sleeved on the rotating rod (14), the movable sleeve (19) being connected to the deflection sleeve (22) via a hinge rod (21), and a protruding column (1901) being formed on the inner wall of the movable sleeve (19), and a fixed sleeve (1902) being provided on the outer wall of the movable sleeve (19), the protruding column (1901) being slidably disposed in a spiral groove (1401) provided on the rotating rod (14), and the fixed sleeve (1902) being slidably connected to a guide rod (20) fixedly disposed on the lifting member (11).

6. The labor-saving fracturing valve according to claim 1, characterized in that: The trigger assembly comprises a trigger structure and a linkage structure, wherein the trigger structure comprises a trigger disk (16) rotatably mounted on the lifting member (11), the trigger disk (16) cooperates with the trigger rod (23), comprises a blocking block (1601) and a notch groove (1602), and the trigger disk (16) is connected to the rotating shaft of the valve plug (12) via a bevel gear set (15).

7. The labor-saving fracturing valve according to claim 6, characterized in that: The linkage structure comprises a main gear (9) rotatably mounted on the valve body (1), a second transmission wheel (18) being coaxially arranged on the rotating shaft of the main gear (9), the second transmission wheel (18) being connected to a first transmission wheel (17) coaxially arranged on the rotating shaft of the valve plug (12) via a transmission belt, and the main gear (9) is meshed with a slave gear (10) rotatably mounted on the valve body (1), and the slave gear (10) is connected to the screw rod (5) via a linkage belt (8).

8. A method for using a labor-saving fracturing valve, characterized in that: The labor-saving fracturing valve according to claim 1 comprises the following steps: Step 1: In the initial state, the valve body (1) is in the open state. When closing the valve body, the rotary disk (4) is rotated, and the driving component pulls the deflection member to deflect toward the valve plug (12) until the deflection member passes the critical position. Then, a slight force is continuously applied to the rotary disk (4), and the deflection member automatically deflects rapidly; Step 2: The automatically deflecting deflection member, in cooperation with the trigger assembly, drives the valve plug (12) to quickly close the valve body (1), and at the same time drives the transformer assembly to operate to increase the accommodation space in the shell (2), thereby reducing the impact of the liquid in the shell (2) on the valve plug (12) when the valve body (1) is instantly closed.

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