CN216843181U - Fracturing valve - Google Patents

Abstract

The utility model provides a fracturing valve. The fracturing valve includes: a valve body having a fluid passage; the valve rod assembly is movably arranged in the valve body and comprises a valve rod and a valve plate arranged on the valve rod, and the valve plate is used for controlling the opening and closing state of the fluid channel; a drive device; the transmission structure is connected with the valve rod; the connecting structure is respectively matched with the output end of the driving device and the transmission structure in a rotation stopping way so as to connect the driving device and the transmission structure through the connecting structure; wherein, drive arrangement drive connection structure rotates to drive the motion of transmission structure through connection structure, so that the valve rod moves along its extending direction. The utility model effectively solves the problem that in the prior art, the operation of a fracturing valve is difficult for workers.

Description

Fracturing valve

Technical Field

The utility model relates to the technical field of oil and gas development equipment, in particular to a fracturing valve.

Background

At present, a fracturing valve is a key device for fracturing operation in oil and gas wells and shale gas development, so as to control the on-off of a pipeline during the fracturing operation, and further realize zipper-type operation.

In prior art, traditional fracturing valve includes manual fracturing valve and hydraulic fracturing valve, and manual fracturing valve needs the manual work to operate the valve rod, has increased staff's intensity of labour, and hydraulic fracturing valve adopts the hydraulic control valve rod to move, and is higher to the pipeline sealing performance requirement of fracturing valve, has increased the processing and the maintenance cost of fracturing valve.

SUMMERY OF THE UTILITY MODEL

The utility model mainly aims to provide a fracturing valve to solve the problem that in the prior art, a worker is difficult to operate the fracturing valve.

In order to achieve the above object, the present invention provides a fracturing valve comprising: a valve body having a fluid passage; the valve rod assembly is movably arranged in the valve body and comprises a valve rod and a valve plate arranged on the valve rod, and the valve plate is used for controlling the opening and closing states of the fluid channel; a drive device; the transmission structure is connected with the valve rod; the connecting structure is respectively matched with the output end of the driving device and the transmission structure in a rotation stopping way so as to connect the driving device and the transmission structure through the connecting structure; wherein, drive arrangement drive connection structure rotates to drive the motion of transmission structure through connection structure, so that the valve rod moves along its extending direction.

Furthermore, the output end is provided with a first matching portion, the transmission structure is provided with a second matching portion, the connection structure comprises a connection body, a third matching portion and a fourth matching portion, the third matching portion and the fourth matching portion are arranged on the connection body, the first matching portion is matched with the third matching portion in a rotation stopping mode, and the second matching portion is matched with the fourth matching portion in a rotation stopping mode.

Further, the transmission structure is a ball screw structure, the outer peripheral surface of a nut of the ball screw structure is a second matching portion, a screw of the ball screw structure is connected with the valve rod, and the extending direction of the screw is consistent with the extending direction of the valve rod.

Further, the connecting body is of a cylindrical structure, the fourth matching part is an inner circumferential surface of the cylindrical structure, and the inner circumferential surface is matched with the second matching part.

Furthermore, one of the first matching part and the third matching part is a protrusion, the other of the first matching part and the third matching part is a concave part, and the protrusion extends into the concave part and is limited and stopped by the concave part, so that the rotation stopping matching of the first matching part and the third matching part is realized.

Further, there is one protrusion and one recess; alternatively, the number of projections is plural, the number of recesses is plural, and the plural projections and the plural recesses are provided in one-to-one correspondence.

Further, the connection structure further includes: the connecting ring is arranged on the connecting body, and the third matching part is connected with the connecting body through the connecting ring; wherein, the connecting ring and the connecting body are coaxially arranged.

Furthermore, the third matching part is a concave part which is a through hole, and the through hole penetrates through the annular wall of the connecting ring; alternatively, the third fitting portion is a groove provided on the outer circumferential surface of the connection ring to extend in the central axis direction of the connection ring.

Furthermore, the third matching part is a notch which penetrates through the annular wall of the connecting ring.

Further, the driving device is an electric actuating mechanism; or the driving device comprises an electric actuating mechanism and a reduction gearbox, the electric actuating mechanism is connected with the reduction gearbox, and the output end of the reduction gearbox is provided with a first matching part.

By applying the technical scheme of the utility model, the connecting structure is used for connecting the driving device and the transmission structure, and the connecting structure is respectively in rotation stopping fit with the output end of the driving device and the transmission structure. The driving device drives the connecting structure to rotate so as to drive the transmission structure to move through the connecting structure, and therefore the valve rod moves along the extending direction of the valve rod. Thus, when the fracturing valve needs to be used, the driving device is started, the driving device drives the transmission structure to move through the connecting structure, so that the valve rod is driven by the transmission structure to move along the extending direction of the valve rod, and the opening and closing state of the fluid channel is further controlled.

Compared with the prior art in which a manual fracturing valve and a hydraulic fracturing valve are used, the fracturing valve in the application is connected with a driving device and a transmission structure through a connecting structure, the movement of the valve rod can be realized only by starting the driving device, the valve rod is not required to be operated manually, the problem that the operation of a worker on the fracturing valve is difficult in the prior art is solved, and the labor intensity of the worker is reduced. Meanwhile, the driving device is connected with the transmission structure through the connecting structure, so that the driving device and the transmission structure are easier and simpler to disassemble and assemble, and the disassembling and assembling difficulty is reduced.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the utility model and, together with the description, serve to explain the utility model and not to limit the utility model. In the drawings:

figure 1 shows a cross-sectional view of a first embodiment of a frac valve according to the present invention;

FIG. 2 shows a partial exploded view of the frac valve of FIG. 1;

fig. 3 shows a perspective view of a connection structure of the fracturing valve of fig. 1;

FIG. 4 shows a schematic perspective view of another angle of the connection structure of FIG. 3;

fig. 5 shows a schematic perspective view of a connection structure of a second embodiment of a frac valve according to the present invention;

fig. 6 shows a schematic perspective view of a connection structure of a third embodiment of a frac valve according to the present invention;

fig. 7 shows a schematic perspective view of a connection of a fourth embodiment of a frac valve according to the present invention;

fig. 8 shows a schematic perspective view of a connection of embodiment five of the frac valve according to the present invention; .

Figure 9 shows a cross-sectional view of an embodiment six of a frac valve according to the present invention; and

Fig. 10 shows a partial exploded view of the frac valve of fig. 9.

Wherein the figures include the following reference numerals:

10. a valve body; 11. a fluid channel; 20. a valve stem assembly; 21. a valve stem; 22. a valve plate; 23. a tail rod; 30. a drive device; 31. an electric actuator; 32. a reduction gearbox; 40. a transmission structure; 41. a nut; 42. a lead screw; 50. a connecting structure; 51. A connecting body; 52. a third mating portion; 53. a fourth mating portion; 54. a connecting ring; 60. a bonnet; 71. an upper valve cover; 72. A lower valve cover; 80. a valve seat; 90. a sealing structure; 100. a guide plate; 110. and (3) a bearing structure.

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

It is noted that, unless otherwise indicated, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

In the present invention, unless stated to the contrary, use of the directional terms "upper and lower" are generally directed to the orientation shown in the drawings, or to the vertical, or gravitational direction; likewise, for ease of understanding and description, "left and right" are generally to the left and right as shown in the drawings; "inner and outer" refer to the inner and outer relative to the profile of the respective member itself, but the above directional terms are not intended to limit the present invention.

In order to solve the problem that the operation of staff to the fracturing valve is comparatively difficult among the prior art, this application provides a fracturing valve.

Example one

As shown in fig. 1 to 4, the fracturing valve includes a valve body 10, a valve stem assembly 20, a driving device 30, a transmission structure 40 and a connecting structure 50. The valve body 10 has a fluid passage 11. A valve stem assembly 20 is movably disposed in the valve body 10, the valve stem assembly 20 includes a valve stem 21 and a valve plate 22 disposed on the valve stem 21, and the valve plate 22 is used for controlling the open/close state of the fluid passage 11. The transmission structure 40 is connected with the valve stem 21. The connecting structure 50 is engaged with the output end of the driving device 30 and the transmission structure 40 in a rotation stop manner, respectively, to connect the driving device 30 and the transmission structure 40 through the connecting structure 50. Wherein, the driving device 30 drives the connecting structure 50 to rotate, so as to drive the transmission structure 40 to move through the connecting structure 50, so as to move the valve rod 21 along the extending direction thereof.

By applying the technical solution of the present embodiment, the connecting structure 50 is used for connecting the driving device 30 and the transmission structure 40, and the connecting structure 50 is respectively in rotation stopping fit with the output end of the driving device 30 and the transmission structure 40. The driving device 30 drives the connecting structure 50 to rotate, so as to drive the transmission structure 40 to move through the connecting structure 50, so as to move the valve rod 21 along the extending direction thereof. Thus, when the fracturing valve needs to be used, the driving device 30 is started, the driving device 30 drives the transmission structure 40 to move through the connecting structure 50, so as to drive the valve rod 21 to move along the extending direction of the valve rod through the transmission structure 40, and further control the opening and closing state of the fluid passage 11.

Compared with the prior art in which a manual fracturing valve and a hydraulic fracturing valve are used, the fracturing valve in the embodiment is connected with the driving device 30 and the transmission structure 40 through the connecting structure 50, the movement of the valve rod 21 can be realized only by starting the driving device 30, the manual operation on the valve rod 21 is not needed, the problem that the operation of a worker on the fracturing valve is difficult in the prior art is solved, and the labor intensity of the worker is reduced. Meanwhile, the driving device 30 is connected with the transmission structure 40 through the connecting structure 50, so that the driving device 30 and the transmission structure 40 are easier and simpler to disassemble and assemble, and the disassembling and assembling difficulty is reduced.

Optionally, the fracturing valve is a fracturing valve for ultrahigh pressure large-drift diameter fracturing operation and can be used for 51/8 '-15 k, 51/8' -20k, 71/16 '-15 k, 71/16' -20k and other fracturing valves.

In the present application, the rotation stop engagement means: the two can not shift in the circumferential direction, and the rotation angle and the rotation speed of the two are consistent.

As shown in fig. 2 to 4, the output end has a first engaging portion, the transmission structure 40 has a second engaging portion, the connection structure 50 includes a connection body 51, a third engaging portion 52 and a fourth engaging portion 53, the third engaging portion 52 and the fourth engaging portion 53 are both disposed on the connection body 51, the first engaging portion is in rotation-stop engagement with the third engaging portion 52, and the second engaging portion is in rotation-stop engagement with the fourth engaging portion 53. In this way, the first matching portion and the third matching portion 52 are in rotation stopping matching to realize matching of the driving device 30 and the connecting structure 50, and the second matching portion and the fourth matching portion 53 are in rotation stopping matching to realize matching between the connecting structure 50 and the transmission structure 40, so that the driving device 30 and the connecting structure 50 can be assembled and disassembled, the transmission structure 40 and the connecting structure 50 can be assembled and disassembled more easily and conveniently, and the assembling and disassembling difficulty is reduced.

Specifically, the third matching portion 52 and the fourth matching portion 53 are respectively located at two ends of the connecting body 51, the third matching portion 52 is matched with the first matching portion in a rotation stopping manner, and the fourth matching portion 53 is matched with the second matching portion in a rotation stopping manner so as to connect the driving device 30 and the transmission structure 40 through the connecting structure 50, so that the driving device 30 and the transmission structure 40 can be more easily and conveniently disassembled and assembled, and the disassembling and assembling difficulty is reduced.

As shown in fig. 1, the transmission structure 40 is a ball screw structure, an outer peripheral surface of a nut 41 of the ball screw structure is a second engagement portion, a screw 42 of the ball screw structure is connected to the valve stem 21, and an extending direction of the screw 42 coincides with an extending direction of the valve stem 21. In this way, the rotation of the connecting structure 50 and the driving device 30 is converted into the linear motion of the screw rod 42 and the valve rod 21 through the ball screw structure, so as to ensure that the valve rod 21 can drive the valve plate 22 to open and close the fluid channel 11, and improve the operation reliability of the fracturing valve. Simultaneously, the motion that above-mentioned setting made valve rod 21 and valve plate 22 is more steady, avoids fracturing valve operation in-process to produce vibration and noise and influences user's use and experience.

Optionally, the transmission structure 40 is a screw nut structure, an outer peripheral surface of the nut 41 of the screw nut structure is a second matching portion, the screw 42 of the screw nut structure is connected with the valve rod 21, and an extending direction of the screw 42 is consistent with an extending direction of the valve rod 21. Like this, above-mentioned setting makes the type of drive structure 40 more nimble to satisfy different user demand and operating mode, also promoted staff's processing flexibility.

As shown in fig. 2 to 4, the connecting body 51 has a cylindrical structure, and the fourth engaging portion 53 has an inner circumferential surface of the cylindrical structure, which is fitted with the second engaging portion. In this way, at least part of the nut 41 extends into the cylindrical structure and is in rotation-stopping fit with the inner circumferential surface of the cylindrical structure, so that the connecting structure 50 and the transmission structure 40 are easier and simpler to disassemble and assemble, and the disassembling and assembling difficulty is reduced. Meanwhile, the structure of the connecting body 51 is simpler, the connecting body is easy to process and realize, the processing cost and the processing difficulty of the connecting structure 50 are reduced, and the lightweight design of the connecting structure 50 is realized.

Specifically, the connecting body 51 includes a bottom plate and a cylindrical portion provided on the bottom plate, an inner peripheral surface of the cylindrical portion is a fourth fitting portion 53, and a third fitting portion 52 is provided on the bottom plate and located outside the cylindrical portion. Wherein the bottom plate has a through hole communicating with the inner cavity of the cylindrical portion, and the third fitting portion 52 is provided around the through hole.

As shown in fig. 2 to 4, one of the first and third fitting portions 52 is a protrusion, and the other of the first and third fitting portions 52 is a recess, and the protrusion extends into the recess and is limited and stopped by the recess, so as to realize the rotation stop fitting of the first and third fitting portions 52. Like this, through protruding and the spacing backstop of concave part to realize the cooperation of splining of first cooperation portion and third cooperation portion 52, and then make the structure of first cooperation portion and third cooperation portion 52 simpler, easy processing, realization have reduced fracturing valve's whole processing cost and processing degree of difficulty. Meanwhile, the arrangement makes the structures of the first matching part and the third matching part 52 more flexible, so as to meet different use requirements and working conditions and improve the processing flexibility of workers.

Specifically, the third engaging portion 52 is a protrusion, the first engaging portion is a recess, and the protrusion extends into the recess and is limited and stopped by the recess, so as to limit the relative movement of the protrusion and the recess in the circumferential direction, and prevent the protrusion and the recess from rotating relatively in the circumferential direction to affect the normal movement of the valve rod 21 of the driving device 30.

In this embodiment, the third matching portion 52 is a three-jaw structure, the three-jaw structure is matched with an output three-jaw rotation stop of the electric actuator, that is, one end of the connecting structure 50 is matched with the output three-jaw rotation stop of the electric actuator, the connecting structure 50 is a hexagonal socket with an inner end and is sleeved on an outer hexagonal socket (nut 41) of the transmission structure 40, so as to transmit the motion to the lead screw 42, the lead screw 42 converts the rotary motion into a linear motion, and the valve plate 22 is driven by the valve rod 21 to move up and down, so as to realize the opening and closing of the valve.

Optionally, there is one projection and one recess; alternatively, the number of projections is plural, the number of recesses is plural, and the plural projections and the plural recesses are provided in one-to-one correspondence. Like this, above-mentioned setting makes the number of arch and concave part more nimble to satisfy different user demand and operating mode, also promoted staff's processing flexibility.

In the present embodiment, there are three protrusions and three recesses, and the three protrusions and the three recesses are provided in one-to-one correspondence. The three protrusions are arranged at intervals around the circumference of the through hole.

It should be noted that the number of the protrusions is not limited to this, and can be adjusted according to the working condition and the use requirement. Optionally, the number of projections is two, or four, or five, or six, or more.

The number of the concave portions is not limited to this, and may be the same as the number of the projections. Optionally, the number of recesses is two, or four, or five, or six, or more.

As shown in fig. 1 and 2, the driving device 30 is an electric actuator. The output end of the electric actuating mechanism is matched with the connecting structure 50 in a rotation stopping mode to replace manual work to operate the valve rod 21 through the electric actuating mechanism, so that the labor intensity of workers is reduced, and the working efficiency of the fracturing valve is improved. Meanwhile, the electric actuating mechanism is high in control precision, so that the adjustable range of the output torque of the fracturing valve is large, compared with the existing hydraulic fracturing valve, the volume of a control box body of the fracturing valve is small, and the occupied space of field arrangement can be reduced.

As shown in FIG. 1, the valve stem assembly 20 further includes a tail rod 23, the tail rod 23 being disposed on an end of the valve stem 21 remote from the transmission structure 40.

As shown in fig. 1, the fracturing valve further comprises a bonnet 60, an upper bonnet 71, a lower bonnet 72, a valve seat 80, a sealing structure 90, a guide plate 100, and a bearing structure 110. Wherein, the upper valve cap 71 and the lower valve cap 72 are respectively arranged at the upper end and the lower end of the valve body 10, the valve cap 60 is arranged at the upper end of the upper valve cap 71, and the transmission structure 40 is fixed between the valve cap 60 and the upper valve cap 71. Bearing structures 110 are disposed between the bonnet 60 and the transmission structure 40, and between the transmission structure 40 and the upper bonnet 71. The valve cap 60 is connected and fixed with an electric actuator, the two valve seats 80 are arranged in the valve body 10, the valve plate 22 is connected with the valve rod 21 at the upper end of the middle of the valve seats 80, the lower end of the valve plate 22 is connected with the tail rod 23, the valve rod 21 is connected with the transmission structure 40, the electric actuator transmits the motion to the transmission structure 40 through the connecting structure 50, and the transmission structure 40 converts the rotary motion into linear motion to drive the valve rod 21, the valve plate 22 and the tail rod 23 to reciprocate up and down so as to realize the opening and closing of the fluid passage 11.

Optionally, the bearing structure 110 is a thrust bearing.

Example two

The fracturing valve in the second embodiment is different from the first embodiment in that: the connecting structure 50 is different in structure.

As shown in fig. 5, the connection structure 50 further includes a connection ring 54. A connection ring 54 is provided on the connection body 51, and the third fitting portion 52 is connected to the connection body 51 through the connection ring 54. Wherein the connection ring 54 is arranged coaxially with the connection body 51. In this way, the third matching portion 52 is disposed on the connection ring 54, and the first matching portion is disposed on the connection body 51, so that the first matching portion and the third matching portion 52 are respectively located at different positions of the connection structure 50, thereby preventing the connection structure 50 from being affected by concentrated acting force, prolonging the service life of the connection structure 50, and improving the connection strength between the driving device 30 and the connection structure 50, and between the transmission structure 40 and the connection structure 50.

As shown in fig. 5, the third mating portion 52 is a concave portion, which is a through hole penetrating through the annular wall of the connection ring 54. Specifically, the first engaging portion is a pin, and the pin is inserted into the through hole to achieve rotation stop engagement between the driving device 30 and the connecting structure 50.

In this embodiment, the number of the through holes is two, the two through holes are arranged oppositely, the number of the pins is two, the two pins and the two through holes are arranged in a one-to-one correspondence manner, and each pin extends into the through hole corresponding to the pin.

It should be noted that the number of the through holes is not limited to this, and can be adjusted according to the working condition and the use requirement. Optionally, the number of through holes is three, or four, or five, or six, or more.

The number of pins is not limited to this, and may be the same as the number of through holes. Optionally, the pins are three, or four, or five, or six, or more.

As shown in FIG. 5, the reduction box and the conversion sleeve can be directly connected in various ways, such as spline connection, flat key connection, four claws and the like.

EXAMPLE III

The fracturing valve in the third embodiment is different from the second embodiment in that: the third fitting portion 52 is different in structure.

As shown in fig. 6, the third fitting portion 52 is a groove provided on the outer circumferential surface of the connection ring 54 to extend in the central axis direction of the connection ring 54. Specifically, the first engaging portion is a key, and the key extends into the groove and is limited and stopped by the groove, so as to realize the rotation stop engagement between the driving device 30 and the connecting structure 50. Meanwhile, the third matching part 52 is simpler in structure, easy to machine and realize, and the machining cost and the machining difficulty of the connecting structure 50 are reduced.

In this embodiment, the recess is two, and two recesses set up relatively, and the key is two, and two keys set up with two recesses one-to-one, and each key stretches into rather than in the corresponding recess.

It should be noted that the number of the grooves is not limited to this, and can be adjusted according to the working condition and the use requirement. Optionally, the number of grooves is three, or four, or five, or six, or more.

The number of keys is not limited to this, and may be the same as the number of grooves. Optionally, the number of keys is three, or four, or five, or six, or more.

Example four

The fracturing valve in the fourth embodiment differs from the third embodiment in that: the number of the third fitting portions 52 is different.

As shown in fig. 7, there are at least three recesses, and the at least three recesses are spaced about the central axis of the connector ring 54. The first mating portion is a spline, and the spline extends into the corresponding groove and is limited and stopped by the groove, so that the rotation stopping mating of the driving device 30 and the connecting structure 50 is realized.

EXAMPLE five

The fracturing valve in the fifth embodiment is different from the second embodiment in that: the third fitting portion 52 is different in structure.

As shown in fig. 8, the third mating portion 52 is a notch that extends through the wall of the connection ring 54. Like this, the structure that above-mentioned setting made third cooperation portion 52 is more diversified to satisfy different user demand and operating mode, also promoted staff's processing flexibility.

Alternatively, the plurality of indentations may be spaced about a central axis of the attachment ring 54.

In this embodiment, the number of the notches is four, the first matching portion is a four-claw structure, and each claw-shaped portion of the four-claw structure extends into the notch and is limited and stopped by the inner surface of the notch, so as to realize the rotation-stopping matching between the driving device 30 and the connecting structure 50.

It should be noted that the annular wall in this application refers to the inner and outer walls of the connection ring 54, i.e. the gap extends through the entire annular wall.

EXAMPLE six

The fracturing valve in the sixth embodiment is different from the first embodiment in that: the structure of the driving device 30 is different.

As shown in fig. 9 and 10, the driving device 30 includes an electric actuator 31 and a reduction box 32, the electric actuator 31 is connected to the reduction box 32, and an output end of the reduction box 32 has a first matching portion. In this way, the reduction gearbox 32 is added between the electric actuator 31 and the connecting structure 50, so that the movement speed of the valve rod 21 can be reduced through the reduction gearbox 32, and the transmission torque of the driving device 30 can also be increased.

Specifically, the electric actuator 31 is in driving connection with the reduction gearbox 32, the reduction gearbox 32 increases the torque output by the electric actuator 31 and transmits the torque to the connecting structure 50, one end of the connecting structure 50 is of a three-jaw structure and is in rotation-stop fit with the output three-jaw structure of the reduction gearbox 32, the other end of the connecting structure 50 is of a hexagon socket and is sleeved on the hexagon socket (nut 41) of the ball screw structure so as to transmit the motion to the screw 42, the screw 42 converts the rotary motion into linear motion and drives the valve plate 22 to move up and down through the valve rod 21, and therefore the opening and closing of the fluid channel 11 are achieved.

From the above description, it can be seen that the above-described embodiments of the present invention achieve the following technical effects:

the connecting structure is used for connecting the driving device and the transmission structure, and the connecting structure is respectively matched with the output end of the driving device and the transmission structure in a rotation stopping manner. The driving device drives the connecting structure to rotate so as to drive the transmission structure to move through the connecting structure, and therefore the valve rod moves along the extending direction of the valve rod. Therefore, when the fracturing valve needs to be used, the driving device is started, the driving device drives the transmission structure to move through the connecting structure, the valve rod is driven through the transmission structure to move along the extending direction of the valve rod, and the opening and closing state of the fluid channel is further controlled.

Compared with the prior art in which a manual fracturing valve and a hydraulic fracturing valve are used, the fracturing valve in the application is connected with a driving device and a transmission structure through a connecting structure, the movement of the valve rod can be realized only by starting the driving device, the valve rod is not required to be operated manually, the problem that the operation of a worker on the fracturing valve is difficult in the prior art is solved, and the labor intensity of the worker is reduced. Meanwhile, the driving device is connected with the transmission structure through the connecting structure, so that the driving device and the transmission structure are easier and simpler to disassemble and assemble, and the disassembling and assembling difficulty is reduced.

It is to be understood that the above-described embodiments are only a few, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular is intended to include the plural unless the context clearly dictates otherwise, and it should be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of features, steps, operations, devices, components, and/or combinations thereof.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in sequences other than those illustrated or described herein.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. A frac valve, comprising:

a valve body (10) having a fluid passage (11);

the valve rod assembly (20) is movably arranged in the valve body (10), the valve rod assembly (20) comprises a valve rod (21) and a valve plate (22) arranged on the valve rod (21), and the valve plate (22) is used for controlling the opening and closing states of the fluid channel (11);

a drive device (30);

a transmission structure (40) connected with the valve rod (21);

the connecting structure (50) is respectively matched with the output end of the driving device (30) and the transmission structure (40) in a rotation stopping way, so that the driving device (30) and the transmission structure (40) are connected through the connecting structure (50);

wherein the driving device (30) drives the connecting structure (50) to rotate so as to drive the transmission structure (40) to move through the connecting structure (50) and enable the valve rod (21) to move along the extending direction of the valve rod;

The driving device (30) is an electric actuating mechanism; or the driving device (30) comprises an electric actuator (31) and a reduction gearbox (32), and the electric actuator (31) is connected with the reduction gearbox (32).

2. The fracturing valve of claim 1, wherein the output end has a first mating portion, the transmission structure (40) has a second mating portion, the connecting structure (50) comprises a connecting body (51), a third mating portion (52) and a fourth mating portion (53), the third mating portion (52) and the fourth mating portion (53) are both disposed on the connecting body (51), the first mating portion is in spline engagement with the third mating portion (52), and the second mating portion is in spline engagement with the fourth mating portion (53).

3. The frac valve of claim 2, wherein the transmission structure (40) is a ball screw structure, the outer peripheral surface of the nut (41) of the ball screw structure is the second engagement portion, the screw (42) of the ball screw structure is connected with the valve stem (21), and the extending direction of the screw (42) is consistent with the extending direction of the valve stem (21).

4. The frac valve of claim 2, wherein the connector body (51) is a cylindrical structure and the fourth mating portion (53) is an inner circumferential surface of the cylindrical structure, the inner circumferential surface conforming to the second mating portion.

5. The frac valve of claim 2, wherein one of the first and third mating portions (52) is a protrusion and the other of the first and third mating portions (52) is a recess, the protrusion extending into the recess and stopping the recess to achieve the anti-rotation engagement of the first and third mating portions (52).

6. The frac valve of claim 5, wherein said protrusion is one and said recess is one; or, the number of the protrusions is multiple, the number of the recesses is multiple, and the protrusions and the recesses are arranged in one-to-one correspondence.

7. The fracturing valve of claim 5, wherein the connection structure (50) further comprises:

a connecting ring (54) provided on the connecting body (51), the third fitting portion (52) being connected to the connecting body (51) through the connecting ring (54);

Wherein the connection ring (54) is arranged coaxially with the connection body (51).

8. The frac valve of claim 7, wherein the third mating portion (52) is the recess, the recess being a through hole extending through an annular wall of the connecting ring (54); alternatively, the third fitting portion (52) is a groove provided on the outer circumferential surface of the connection ring (54) to extend in the central axis direction of the connection ring (54).

9. The frac valve of claim 7, wherein the third mating portion (52) is a notch extending through an annular wall of the connector ring (54).

10. The frac valve of claim 2, wherein the output of the reduction gearbox (32) has the first mating portion.

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