Labor-saving fracturing valve and using method thereof

Abstract

The invention relates to the technical field of oil and gas development equipment, in particular to a labor-saving fracturing valve and a using method thereof.The labor-saving fracturing valve comprises a valve body, a shell is arranged on the valve body, a buffer cavity is formed in the shell, and a pressure transformation assembly is arranged on the buffer cavity; a lifting part is further arranged in the valve body, a valve opening mechanism is arranged on the lifting part and comprises an elastic deflection assembly and a driving assembly, the elastic deflection assembly comprises a deflection part, the driving assembly is connected with a rotating disc rotationally installed on the buffering cavity, and the driving assembly can drive the deflection part to deflect relative to the lifting part by rotating the rotating disc. When the deflection part crosses the critical position, the deflection part can quickly and automatically deflect, and meanwhile the driving assembly is driven to continue to act; and the trigger assembly is arranged in the valve body, is matched with the deflection piece, can drive a valve plug arranged in the valve body to rotate relative to the valve body, and can drive the variable-pressure assembly to change the containing space in the shell when the valve plug rotates.

Description

Technical Field

[0001] The invention relates to the technical field of oil and gas development equipment, in particular to a labor-saving fracturing valve and a use method thereof. Background Art

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

[0003] When conducting oil extraction, it is necessary to first survey the underground environment, determine the location of the oil, and analyze the underground structure and the oil reservoir. After the analysis is completed, use drilling equipment to drill underground until the oil reservoir is reached. After the drilling is completed, the oil can be extracted from the reservoir. There are many ways to extract oil, including natural oil extraction, fracturing, and water injection. Water injection is to inject water into the reservoir to increase the reservoir pressure and make it easier for the oil to flow out of the wellhead.

[0004] After oil well production reaches a certain stage, the production capacity and permeability decrease. In order to enhance the oil drainage capacity and increase the oil well output, people invented the fracturing technology. There are two types of fracturing methods: hydraulic fracturing and high-energy gas fracturing. Hydraulic fracturing is a method in which a ground high-pressure pump truck injects fluid into a well at high speed, and uses the high pressure at the bottom of the well to break the oil layer rock and produce 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, thereby realizing zipper-type operations. Current fracturing valves include manual fracturing valves and hydraulic fracturing valves. The manual fracturing valve has excessive switching torque and a relatively small number of switching turns, and has the disadvantages of being time-consuming and labor-intensive to switch. When a manual fracturing valve is used to control the on-off of the pipeline, the operation is slow when the pipeline is closed, which increases the possibility of oil spilling out of the pipeline, resulting in a waste of oil during the extraction process. At the same time, at the moment after the valve is closed, the injected fluid will have a certain impact on the valve plug. The long-term accumulation of impact will affect the valve plug, and then affect the on-off control of the pipeline by the valve plug, thereby affecting the oil extraction operation. Summary of the invention

[0005] The object of the present invention is to provide a labor-saving fracturing valve and a method of using the same to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions: A labor-saving fracturing valve, comprising: A valve body, wherein a shell is disposed on the valve body, a buffer cavity is disposed on the shell, and a voltage transformer assembly is disposed on the buffer cavity; A lifting member is also provided in the valve body, and a valve opening mechanism is provided on the lifting member. 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 rotatably mounted on the buffer chamber. By rotating the turntable, the driving assembly can drive the deflection member to deflect relative to the lifting member. 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. The trigger assembly is arranged in the valve body and cooperates with the deflection member to drive the valve plug arranged in the valve body to rotate relative to the valve body. When the valve plug rotates, it can drive the voltage-changing assembly to change the accommodating space in the shell.

[0007] The labor-saving fracturing valve as described above: the pressure-changing assembly includes a screw rod rotating on the buffer chamber, the screw rod is provided with a threaded sleeve threadedly connected thereto, and the threaded sleeve is connected to a pushing member slidably arranged in the buffer chamber through a connecting rod.

[0008] The labor-saving fracturing valve as described above: the pushing member includes a pushing rod slidably arranged in the buffer cavity, a piston disk is coaxially arranged at one end of the pushing rod immersed in the buffer cavity, and the pushing rod is inserted into a sleeve arranged on the buffer cavity.

[0009] The labor-saving fracturing valve as described above: the deflection member includes a deflection sleeve rotatably mounted on the supporting member, a telescopic rod is slidably arranged 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 arranged at one end of the deflection sleeve away from the telescopic rod.

[0010] The labor-saving fracturing valve as described above: the elastic deflection assembly also includes a deflection rod rotatably mounted on the lifting member, and 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.

[0011] The labor-saving fracturing valve as described above: the driving assembly includes a rotating rod installed on the lifting member, the rotating rod is connected to the deflection sleeve through a moving member, and the end of the rotating rod away from the valve plug is coaxially connected to the turntable through a driving rod.

[0012] The labor-saving fracturing valve as described above: the movable part includes a movable sleeve sleeved on the rotating rod, the movable sleeve is connected to the deflection sleeve through a hinge rod, and a protrusion is formed on the inner wall of the movable sleeve, and a fixed sleeve is arranged on the outer wall of the movable sleeve, the protrusion is slidably arranged in a spiral groove opened on the rotating rod, and the fixed sleeve is slidably connected to a guide rod fixed on the lifting member.

[0013] The labor-saving fracturing valve as described above: the trigger assembly includes a trigger structure and a linkage structure, the trigger structure includes a trigger disk rotatably mounted on the lifting member, the trigger disk cooperates with the trigger rod, includes a blocking block and a notch groove, and the trigger disk is connected to the rotating shaft of the valve plug through a bevel gear set.

[0014] The labor-saving fracturing valve as described above: the linkage structure includes a main gear rotatably mounted 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 the first transmission wheel coaxially arranged on the rotating shaft of the valve plug through a transmission belt, and the main gear is meshed with a slave gear rotatably mounted on the valve body, and the slave gear is connected to the screw rod through a linkage belt.

[0015] A method for using a labor-saving fracturing valve is also proposed, using the labor-saving fracturing valve described in the above claims, comprising the following steps: Step 1: In the initial state, the valve body is in the open state. When closing the valve body, turn the turntable, and the drive assembly will pull the deflection member to deflect toward the valve plug until the deflection member passes the critical position. Then, continue to apply a little force to the turntable, and the deflection member will automatically deflect quickly; Step 2: The automatically deflecting deflection member will drive the valve plug to quickly close the valve body with the cooperation of the trigger component, and at the same time drive the transformer component to increase the storage space inside the shell, thereby reducing the impact of the liquid in the shell on the valve plug when the valve body is instantly closed.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 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. The manual driving process requires the operator to continuously apply 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, the elastic deflection component will automatically and quickly move without the operator applying external force. In this process, the elastic deflection component cooperates with the trigger component to drive the valve plug to quickly rotate 90 degrees for a closing operation, thereby quickly cutting off the shell and the pipeline, which can reduce the possibility of oil spilling from the pipeline to the shell and avoid waste of oil during the extraction process. When the valve plug is closed, the linkage structure arranged on the lifting member will drive the screw rod to rotate continuously, so as to drive the push rod to pull the piston disc to perform a pulling and withdrawing action. During this process, the piston disc performing the pumping will quickly draw the water flow entering the shell into the buffer chamber. Under the pumping operation of the piston disc, the internal accommodation space of the shell is increased. By utilizing 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

[0017] Figure 1 This is a schematic diagram of the structure of a labor-saving fracturing valve.

[0018] Figure 2 It is a schematic diagram of the structure of the valve body in the labor-saving fracturing valve.

[0019] Figure 3 It is a structural schematic diagram of the internal cross-sectional view of one side of the valve body in a labor-saving fracturing valve.

[0020] Figure 4 It is a structural schematic diagram of the internal cross-sectional view of the other side of the valve body in the labor-saving fracturing valve.

[0021] Figure 5 This is a schematic diagram of the structure of the connection between the trigger structure and the valve plug in the labor-saving fracturing valve.

[0022] Figure 6 It is a structural schematic diagram of the valve opening mechanism in a labor-saving fracturing valve.

[0023] Figure 7 This is a schematic diagram of the structure of the trigger disk in the labor-saving fracturing valve.

[0024] Figure 8 It is a structural schematic diagram of the driving structure in the labor-saving fracturing valve.

[0025] Fig. 9 It is a schematic diagram of the structure of the connection between the moving part and the elastic deflection assembly in the labor-saving fracturing valve.

[0026] Fig.10 It is a schematic diagram of the structure of the deflection member in the labor-saving fracturing valve.

[0027] Fig.11 This is a structural schematic diagram of the cooperation between the pressure-changing component and the buffer chamber in a labor-saving fracturing valve.

[0028] Fig.12 This is a schematic diagram of the structure inside the buffer chamber in a labor-saving fracturing valve.

[0029] Fig.13 This is a schematic diagram of the structure of the pusher in the labor-saving fracturing valve.

[0030] Fig.14 It is a schematic diagram of the structure of the sleeve in the labor-saving fracturing valve.

[0031] 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

[0032] 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.

[0033] 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.

[0034] 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.

[0035] See also Figure 1-Figure 14 In an embodiment of the present invention, a labor-saving fracturing valve comprises: A valve body 1, wherein the valve body 1 is provided with a shell 2, wherein the shell 2 is provided with a buffer chamber 3, and wherein the buffer chamber 3 is provided with a voltage transformer assembly; For example, see Figure 1 , Figure 2The upper and lower ends of the valve body 1 are respectively provided with an upper port 101 and a lower port 102, which are coaxially arranged. The lower port 102 of the valve body 1 is connected to a pipeline buried under the surface and directly reaching underground flowing resources (including underground oil and underground gas). The upper port 101 of the valve body 1 is communicated with the interior of the shell 2, and the end of the shell 2 away from the valve body 1 is connected to a pumping device. When collecting underground resources, it is necessary to monitor the underground environment first, and after the location of the oil is inferred, drilling is started to open a channel for the oil to the ground. After the drilling is completed, the pipeline is extended to the channel, and after reaching the oil, the valve body 1 and the shell 2 are connected to the pipeline. When the position of the valve body 1 is fixed, the pumping device is started first, and then the valve body 1 is opened. During the working process, the pumping device will inject water into the reservoir through the valve body 1, the shell 2 and the pipeline to increase the reservoir pressure so that the oil can flow out of the wellhead more easily. During the mining process, when the valve body 1 is suddenly closed, the water flow injected into the valve body 1 through the shell 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 such 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 by the transformer assembly to increase the accommodating space of the shell 2, thereby reducing the impact force of the water flow on the valve plug 12.

[0036] Specifically, the transformer assembly includes a screw rod 5 rotating on the buffer chamber 3, the screw rod 5 is provided with a threaded sleeve 6 threadedly connected thereto, and the threaded sleeve 6 is connected to a pushing member slidably arranged in the buffer chamber 3 through a connecting rod 27; For details, please refer to Figure 1 , Fig.11 , Fig.12 The two ends of the screw rod 5 are rotatably connected to the two sets of receiving plates 301 arranged on the buffer chamber 3, and the connecting rod 27 is arranged in an "L"-shaped structure and passes through the receiving plate 301. When the screw rod 5 continues to move in the same direction, the threaded sleeve 6 moves along the axial direction of the screw rod 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, thereby changing the storage space inside the shell 2.

[0037] 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 arranged on the buffer cavity 3; Preferably, see Fig.11 , Fig.12 , Fig.13 , Fig.14The outer wall of the push rod 7 is provided with two groups of slots 701 equidistantly along its circumferential direction, the sleeve 28 is coaxial with the buffer chamber 3, and the inner wall of the sleeve 28 is provided with two groups of blocks 2801 equidistantly along its circumferential direction, and the blocks 2801 are slidably arranged in the slots 701, so that the push rod 7 can only move along the axial direction of the buffer chamber 3, and in particular, the piston disc is sealed and slidably connected 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; In the initial state, the valve plug 12 is opened, and the piston disc is close to the shell 2. At this time, the capacity of the shell 2 is the smallest, and the water flow rate injected into the shell 2 and the valve body 1 through the pumping device will be relatively fast, and then 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 screw rod 5 will quickly rotate 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 in the direction away from the shell 2. In this process, the piston disc performing the pumping will quickly pump the water flow entering the shell 2 to the buffer chamber 3, the inner chamber of the shell 2 is enlarged under the pumping operation of the piston disc, and the cooperation between the two can reduce the impact force of the water flow on the valve plug 12, thereby extending the service life of the valve plug 12; at the same time, the valve plug 12 is quickly closed, and the shell 2 and the pipeline can be quickly cut off, which can reduce the possibility of oil overflowing from the pipeline to the shell 2 and avoid the waste of oil during the production process; similarly, when the valve plug 12 is opened, the screw rod 5 rotates rapidly in the opposite direction, which will drive the piston disc back to the initial position, so that the water flow can maintain a high-speed flow state and be injected into the reservoir.

[0038] For further information, see Figure 3 , Figure 4 , Figure 6 , Figure 8 , Fig. 9 , Fig.10 A lifting member 11 is also 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 component and a driving component. The elastic deflection component includes a deflection member. The driving component is connected to a turntable 4 rotatably mounted on the buffer chamber 3. By rotating the turntable 4, the driving component 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 automatically deflect quickly and drive the driving component to continue to move. For details, please refer to Figure 3 , Figure 4The valve body 1 is provided with a receiving cavity and a flow cavity, the lifting member 11 is provided in the receiving cavity, and the valve plug 12 is installed in the flow cavity in a conical sealing manner. The valve plug 12 of this shape cooperates with the valve body 1, has the characteristics of compact structure and small torque, and a through hole 1201 is provided on the valve plug 12. The through hole 1201 cooperates with the upper port 101 and the lower port 102, and can conduct or block the valve body 1.

[0039] The deflection member includes a deflection sleeve 22 rotatably mounted 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 one end of the deflection sleeve 22 away from the telescopic rod 26; For details, please refer to Figure 6 , Fig. 9 , Fig.10 The deflection sleeve 22 is provided with a slide groove 2201 on both sides thereof, and the telescopic rod 26 is provided with a slider 2601 on both sides thereof. The slider 2601 is slidably arranged in the slide groove 2201 so that the telescopic rod 26 will not move away from the deflection sleeve 22.

[0040] The elastic deflection assembly further comprises a deflection rod 25 rotatably mounted on the lifting 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; The driving assembly includes a rotating rod 14 mounted 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 rotating disk 4 through a driving rod 13; 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; Preferably, please combine Figure 4 , Figure 6 , Fig. 9 The spiral groove 1401 is opened counterclockwise around the rotating rod 14 (refer to Figure 6 ,and Figure 6The 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; 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; The above-mentioned valve opening process includes two processes, manual drive and automatic adjustment. The manual drive process requires the operator to continuously apply 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 external force. The deflection sleeve 22 that rotates rapidly and automatically will drive the valve plug 12 to rotate rapidly by ninety degrees with the cooperation of the trigger component to close the valve body 1. During the closing process, the screw rod 5 will rotate rapidly to drive the piston disk back to the initial position close to the shell 2, so that the water flow can maintain a high-speed flow state and be injected into the reservoir.

[0041] Furthermore, a labor-saving fracturing valve further includes a trigger assembly, which is disposed in the valve body 1 and cooperates with the deflection member to drive a valve plug 12 disposed in the valve body 1 to rotate relative to the valve body 1, and when the valve plug 12 rotates, it can drive the pressure-changing assembly to change the accommodation space in the housing 2; The trigger assembly includes a trigger structure and a linkage structure. The trigger structure includes a trigger plate 16 rotatably mounted on the lifting member 11. The trigger plate 16 cooperates with the trigger rod 23 and includes a blocking block 1601 and a notch groove 1602. The trigger plate 16 is connected to the rotating shaft of the valve plug 12 through a bevel gear set 15. For details, please refer to Figure 5 The 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 trigger disk 16; For example, in the embodiment of the present invention, the deflection angle of the deflection sleeve 22 is set to 120 degrees, so the arc angle corresponding to the notch groove 1602 is 60 degrees. Correspondingly, the radius of the second bevel gear is 1.5 times the radius of the first bevel gear, so that when the trigger plate 16 is driven by the trigger rod 23 to rotate 60 degrees in the same direction, it can just drive the first bevel gear to rotate 90 degrees, and then drive the valve plug 12 to perform the conduction or blocking operation (the ratio of the radius of the first bevel gear to the second bevel gear is affected by the deflection angle of the deflection sleeve 22, and the proportional coefficient can be such that when the trigger plate 16 rotates, it can drive the valve plug 12 to rotate 90 degrees); Detailed, combined Figure 6 The trigger rod 23 is located on the notch groove 1602 and fits with one end surface of the baffle block 1601. In combination with the above, when the turntable 4 is manually driven to rotate and the deflection sleeve 22 is driven to deflect, the trigger rod 23 will slide on the notch groove 1602. When the deflection sleeve 22 passes the critical position, the trigger rod 23 will slide along the notch groove 1602 until it fits with the other end surface of the baffle block 1601. Subsequently, the deflection sleeve 22 that enters automatic deflection will drive the trigger rod 23 to keep rotating rapidly counterclockwise. During this process, the trigger rod 23 will drive the trigger disk 16 to rotate rapidly counterclockwise. During the rotation, the second bevel gear and the first bevel gear enter into a meshing transmission state, which will drive the valve plug 12 to rotate ninety degrees, quickly close the valve body 1, and prevent oil backflow.

[0042] Furthermore, the linkage structure includes a main gear 9 rotatably mounted 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 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 through a linkage belt 8; Preferably, see Figure 5The radius of the first transmission wheel 17 is a multiple of the radius of the second transmission wheel 18, so that when the first transmission wheel 17 rotates ninety degrees following the valve plug 12, it can drive the main gear 9 to rotate multiple times, and the radius of the main gear 9 is a multiple of the radius of the slave gear 10, so that when the main gear 9 rotates one circle, it can drive the slave gear 10 to rotate multiple circles; In combination with the above, the cooperation between the bevel gear set 15 and the first transmission wheel 17 and the second transmission wheel 18 enables the valve plug 12 to drive the screw rod 5 to rotate multiple circles when performing a quick closing operation, thereby driving the push rod 7 to expand the storage space inside the shell 2, thereby reducing the impact of the water flow in the shell 2 on the valve plug 12 and increasing the service life of the valve body 1.

[0043] A method for using a labor-saving fracturing valve is also proposed, using the labor-saving fracturing valve described in claim 1, comprising the following steps: Step 1: In the initial state, the valve body 1 is in the open state. When closing the valve body, the turntable 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 applied to the turntable 4, and the deflection member will automatically deflect quickly. Step 2: The automatically deflecting deflection member will, with the cooperation of the trigger assembly, drive the valve plug 12 to quickly close the valve body 1, and at the same time drive the transformer assembly to increase the storage 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.

[0044] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0045] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A 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 is arranged in the valve body (1) and cooperates with the deflection member to drive 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).

2. A labor-saving fracturing valve according to claim 1, characterized in that: 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).

3. A labor-saving fracturing valve according to claim 2, 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).

4. A labor-saving fracturing valve according to claim 2, characterized in that: 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).

5. The labor-saving fracturing valve according to claim 4, 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).

6. A labor-saving fracturing valve according to claim 5, 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).

7. The labor-saving fracturing valve according to claim 6, 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).

8. The labor-saving fracturing valve according to claim 4, 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).

9. The labor-saving fracturing valve according to claim 8, 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).

10. 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.

Images