Valves and fracturing equipment

Abstract

The application discloses a valve and a fracturing device, and belongs to the technical field of oil and gas exploitation. The valve comprises a valve body, a valve seat, a support, a valve plate and a first sealing ring. The valve body is provided with a flow channel and a mounting hole which are in communication with each other. The valve seat is embedded in the flow channel, and the valve seat is provided with a through hole in communication with the flow channel. The support is fixedly and sealingly mounted in the mounting hole. The valve plate is rotatably mounted on the support, and the valve plate is located downstream of the valve seat. The first sealing ring is arranged between the valve plate and the valve seat, and the valve plate is sealingly connected with the valve seat through the first sealing ring. The valve can solve the problem that the sealing effect of the current valve is poor.

Description

Technical Field

[0001] This application belongs to the field of oil and gas extraction technology, specifically relating to a valve and fracturing equipment. Background Technology

[0002] In oilfield fracturing operations, especially under high-pressure and high-displacement conditions, check valves play a crucial role. They can automatically close the valve plate to achieve reverse flow control when fluid flows back. Specifically, the valve plate is typically rotatably mounted on a bracket. Due to fluid impact, the surface roughness of the valve plate's sealing surface facing the valve seat deteriorates over time, negatively impacting the sealing effect. Utility Model Content

[0003] The purpose of this application is to provide a valve and fracturing equipment to solve the problem of poor sealing performance of current valves.

[0004] In a first aspect, embodiments of this application disclose a valve applied to fracturing equipment. The valve includes a valve body, a valve seat, a bracket, a valve plate, and a first sealing ring. The valve body has a flow channel and a mounting hole that communicate with each other. The valve seat is embedded in the flow channel and has a through hole that communicates with the flow channel. The bracket is fixedly and sealedly installed in the mounting hole. The valve plate is rotatably installed on the bracket and is located downstream of the valve seat. The first sealing ring is provided between the valve plate and the valve seat, and the valve plate is sealed to the valve seat through the first sealing ring.

[0005] Secondly, embodiments of this application disclose a fracturing device, which includes the aforementioned valve.

[0006] This application discloses a valve comprising a valve body, a valve seat, a bracket, a valve plate, and a first sealing ring. The valve seat is embedded in a flow channel within the valve body, and a bracket is fixedly and sealed at a mounting hole in the valve body that communicates with the flow channel, providing excellent sealing performance. Simultaneously, the valve plate is rotatably mounted on the bracket and located downstream of the valve seat, enabling the valve to discharge liquid in one direction and preventing backflow. Furthermore, in the valve disclosed in this application, a first sealing ring is provided between the valve plate and the valve seat, and the valve plate is sealed to the valve seat via the first sealing ring. In this case, when liquid downstream of the valve flows back to the valve plate, the liquid drives the valve plate to abut against the valve seat and simultaneously causes the valve plate to compress the first sealing ring, further improving the reliability of the sealing fit between the valve plate and the valve seat. Attached Figure Description

[0007] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments of this application and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0008] Figure 1 This is a cross-sectional schematic diagram of the valve disclosed in an embodiment of this application;

[0009] Figure 2 This is a cross-sectional view of the valve disclosed in an embodiment of this application at another location;

[0010] Figure 3 This is a cross-sectional view of the valve disclosed in an embodiment of this application at another location;

[0011] Figure 4 This is a schematic diagram illustrating the fit between the valve plate and the bracket in the valve disclosed in the embodiments of this application;

[0012] Figure 5 This is a structural schematic diagram of a portion of the valve structure, including the valve plate, disclosed in an embodiment of this application.

[0013] Figure 6 for Figure 5 A cross-sectional schematic diagram of the structure is shown.

[0014] Figure label:

[0015] 1-Valve body, 2-Valve seat, 3-Bracket, 4-Valve plate, 41-Round hole, 5-First sealing ring, 6-Positioning pin, 7-Second sealing ring, 8-Rotating shaft, 9-Limiting pin, 10-First wear-resistant sleeve, 11-Second wear-resistant sleeve, 12-Round protrusion, 13-Third sealing ring. Detailed Implementation

[0016] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0017] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0018] like Figures 1-4 As shown, this application discloses a valve that can be used in fracturing equipment to prevent liquid backflow in the pipeline. Figure 1 As shown, the valve includes a valve body 1, a valve seat 2, a bracket 3, a valve plate 4, and a first sealing ring 5. Of course, the valve may also include other components such as a valve cover, but for the sake of brevity, they will not be described in detail here.

[0019] The valve body 1 is the main structure of the valve, and components such as the valve seat 2 and the bracket 3 can be directly or indirectly installed on the valve body 1. The valve body 1 is provided with a flow channel, which allows the valve body 1 to be connected to pipelines. This enables the pipeline located on the first end of the valve to communicate with the pipeline located on the second end of the valve through the flow channel of the valve body 1, ensuring that the liquid between the pipelines can pass through the valve body 1 to complete the purpose of liquid transportation.

[0020] The valve seat 2 mates with the valve plate 4 to prevent liquid in the pipe located on the second end side of the valve from flowing backward through the valve and into the pipe located on the first end side of the valve. Specifically, the valve seat 2 is embedded in the flow channel of the valve body 1. To ensure proper liquid transport between the pipes, the valve seat 2 has a through hole that communicates with the flow channel of the valve body 1. Therefore, after the valve seat 2 is embedded in the flow channel of the valve body 1, it also ensures that liquid in the pipe on one side of the valve body 1 can flow through the through hole of the valve seat 2 to the pipe on the other side of the valve body 1. More specifically, the axial direction of the through hole is parallel to the axial direction of the flow channel, which ensures a relatively high discharge rate of the valve.

[0021] In one specific embodiment of this application, the flow channel of the valve body 1 may be provided with internal threads, and the valve seat 2 may be provided with external threads, so that the two can be assembled with each other by means of threaded connection. Considering that when the aforementioned assembly method is adopted, the internal thread machining process of the valve body 1 requires the use of special tools, and the rigidity of the entire valve body 1 is relatively poor, at the same time, the surface roughness of the threads machined on the valve body 1 and the valve seat 2 cannot be guaranteed, and special tools are required for maintenance, resulting in high labor intensity.

[0022] Therefore, in another embodiment of this application, an interference fit can be used to form a reliable fixed connection between the valve seat 2 and the valve body 1. However, when using this technical solution, on the one hand, it is necessary to ensure successful installation on the first attempt, which requires a high level of skill in installing the components. On the other hand, since the valve seat 2 and the valve body 1 are in an interference fit relationship, the valve seat 2 and the valve body 1 cannot be separated. Even if there is a minor fault in the valve seat 2 and the valve body 1, it is impossible to maintain and repair them, resulting in relatively high usage costs.

[0023] Based on the above, through further creative work, the applicant has developed a specific embodiment in this application in which the valve seat 2 and the valve body 1 are fitted with a clearance. Under this condition, the installation difficulty between the valve seat 2 and the valve body 1 is relatively low, and the two have the ability to be repeatedly disassembled and assembled.

[0024] Of course, in order to prevent the valve seat 2 from falling off the flow channel of the valve body 1 during operation, in this embodiment of the application, a through hole is provided on the side wall of the valve body 1. Correspondingly, a positioning blind hole is provided on the valve seat 2. At the same time, the valve disclosed in this embodiment of the application also includes a positioning pin 6. During the valve assembly process, the positioning pin 6 can pass through the through hole and be inserted into the positioning blind hole, thereby achieving the purpose of fixing the valve seat 2 and the valve body 1 in the axial direction of the flow channel.

[0025] As described above, the valve seat 2 is installed in the flow channel of the valve body 1. In order to ensure that the valve seat 2 can be installed inside the valve body 1, the valve body 1 disclosed in the present application embodiment is also provided with an installation hole. The installation hole is connected to the flow channel, so that the valve seat 2 can be sent into the flow channel through the installation hole and embedded in the flow channel.

[0026] Of course, to ensure that the mounting hole does not affect the valve's sealing performance, the valve disclosed in this application embodiment also includes a bracket 3, which further serves to provide mounting for the valve plate 4. More specifically, as... Figure 1 As shown, bracket 3 is fixed and sealed in the mounting hole. After valve seat 2 and valve plate 4 are installed in the corresponding positions in the flow channel, the valve plate 4 can form a corresponding mating relationship with valve seat 2 by installing bracket 3 in the mounting hole. At the same time, it ensures that the mounting hole will not affect the sealing performance of the valve.

[0027] Specifically, the bracket 3 can be connected to the mounting hole by an interference fit. As mentioned above, in order to ensure that the valve has detachable maintenance, the valve seat 2 and the valve body 1 can be connected by a clearance fit. Therefore, in this embodiment, the bracket 3 can be provided with an external thread, and the mounting hole of the valve body 1 can be provided with an internal thread. In this case, the bracket 3 and the valve body 1 can be fixedly connected by a threaded fit to ensure that the bracket 3 and the valve body 1 have the ability to be repeatedly disassembled and assembled.

[0028] As described above, the locating pin 6 can be used to reliably fix the valve seat 2 and the valve body 1. Therefore, based on the above embodiments of this application, the bracket 3 can also be provided with a through hole, and the locating pin 6 can pass through the through holes of both the bracket 3 and the valve body 1, and then be inserted into the locating blind hole of the valve seat 2. When using the technical solution disclosed in the embodiments of this application, the locating pin 6 can also position the relationship between the bracket 3 and the valve body 1, thereby preventing the bracket 3 from slightly rotating or deflecting relative to the mounting hole due to a gap between the outer diameter of the bracket 3 and the inner diameter of the mounting hole, during the installation of valve covers and other components, or when fluid impacts the bracket 3 during valve operation. This could cause the valve plate 4 to shift position, and even disrupt the sealing relationship between the bracket 3 and the mounting hole, leading to valve sealing failure.

[0029] As described above, the bracket 3 is sealed and installed in the mounting hole. Specifically, a sealing ring or other device can be sandwiched between the bracket 3 and the valve body 1. During the assembly process of the bracket 3, the sealing ring is squeezed between the bracket 3 and the valve body 1, which can form a sealing fit between the bracket 3 and the mounting hole of the valve body 1.

[0030] To ensure that valve plate 4 does not obstruct the forward flow of liquid, in this embodiment of the application, such as Figure 1 As shown, valve plate 4 is rotatably mounted on bracket 3, and valve plate 4 is located downstream of valve seat 2. In this case, when upstream liquid flows through valve plate 4, the liquid can drive valve plate 4 to rotate relative to valve seat 2, thereby opening valve plate 4 and ensuring that liquid upstream of valve seat 2 can pass through valve seat 2 and flow downstream of valve seat 2. Conversely, when liquid downstream of valve seat 2 flows towards valve plate 4, the impact of the liquid on valve plate 4 can cause it to abut against valve seat 2, thereby blocking the through hole of valve seat 2 and preventing the liquid downstream of valve seat 2 from flowing backward.

[0031] To improve the sealing performance between the valve plate 4 and the valve seat 2, thereby enhancing the valve's ability to block backflow, a first sealing ring 5 is provided between the valve plate 4 and the valve seat 2 in the valve disclosed in this application embodiment. The first sealing ring 5 is arranged around the through hole of the valve seat 2, and the valve plate 4 is sealed to the valve seat 2 through the first sealing ring 5. The first sealing ring 5 is made of an elastic material such as rubber. In this case, when the liquid downstream of the valve flows in the reverse direction to the valve plate 4, the valve plate 4 rotates in the reverse direction under the action of the liquid driving force and abuts against the valve seat 2. During this process, the liquid driving force further enhances the abutting force between the valve plate 4 and the valve seat 2. Under the action of the aforementioned force, the first sealing ring 5 can undergo a certain elastic deformation, which can further improve the sealing effect between the valve plate 4 and the valve seat 2.

[0032] To further improve the installation stability of the first sealing ring 5, in a specific embodiment of this application, a limiting groove can be provided on the side surface of the valve plate 4 facing the valve seat 2, and the limiting groove can be a closed ring structure. By embedding a part of the first sealing ring 5 in the limiting groove, the assembly stability between the first sealing ring 5 and the valve plate 4 can be relatively higher.

[0033] Considering that the valve plate 4 will rotate frequently relative to the valve body 1 (and valve seat 2) during valve operation, in another embodiment of this application, the valve seat 2 can be provided with the aforementioned limiting groove on one end face facing the valve plate 4. In this case, the first sealing ring 5 installed in the limiting groove can form a good relative fixed relationship with both the valve body 1 and the valve seat 2, which can further improve the stability of the first sealing ring 5.

[0034] To further improve the sealing reliability between the valve plate 4 and the valve seat 2 in the valve, the valve disclosed in this application embodiment may further include a third sealing ring 13, and the third sealing ring 13 is fixedly installed on the side surface of the valve plate 4 facing the valve seat 2. At the same time, the third sealing ring 13 is arranged around the first sealing ring 5, and the protrusion height of the third sealing ring 13 relative to the valve plate 4 is less than the protrusion height of the first sealing ring 5 relative to the valve seat 2.

[0035] As described above, a limiting groove can be provided on the side surface of the valve seat 2 facing the valve plate 4, and a portion of the first sealing ring 5 can be embedded in the limiting groove. Obviously, the protrusion height of the portion of the first sealing ring 5 that is not embedded in the limiting groove is the protrusion height of the first sealing ring 5 relative to the valve seat 2. In this embodiment, by placing the third sealing ring 13 outside the first sealing ring 5 and making the protrusion height of the third sealing ring 13 relative to the valve plate 4 less than the protrusion height of the first sealing ring 5 relative to the valve seat 2, the valve plate 4 can first contact the first sealing ring 5 provided on the valve seat 2 and achieve a primary seal when the valve is working. As the pressure of the backflowing liquid at the valve gradually increases, the valve plate 4 can be further squeezed towards the valve seat 2. During this process, the third sealing ring 13 installed on the valve plate 4 can be further fitted with the end face of the valve seat 2 to achieve a secondary seal. Thus, the valve disclosed in this embodiment has the ability to seal across the entire pressure range (i.e., low pressure, medium pressure, and high pressure), ensuring that the sealing reliability of the valve is always relatively high.

[0036] In addition, in this embodiment, the portion of the valve plate 4 located inside the third sealing ring 13 on the side facing the valve seat 2 can be designed as a convex circle structure with a specific radius of curvature, which can improve the flow field distribution of the fluid and reduce the erosion of the valve plate 4 by the fluid.

[0037] This application discloses a valve comprising a valve body 1, a valve seat 2, a bracket 3, a valve plate 4, and a first sealing ring 5. The valve seat 2 is embedded in the flow channel of the valve body 1, and the bracket 3 is fixedly and sealed at a mounting hole in the valve body 1 that communicates with the flow channel, thus providing a good sealing effect. Simultaneously, the valve plate 4 is rotatably mounted on the bracket 3 and is located downstream of the valve seat 2, thereby enabling the valve to have unidirectional drainage capability and preventing backflow of liquid. Furthermore, in the valve disclosed in this application, a first sealing ring 5 is provided between the valve plate 4 and the valve seat 2, and the valve plate 4 is sealed to the valve seat 2 through the first sealing ring 5. In this case, when the liquid downstream of the valve flows back to the valve plate 4, the liquid drives the valve plate 4 to abut against the valve seat 2, and simultaneously causes the valve plate 4 to squeeze the first sealing ring 5, which further improves the reliability of the sealing fit between the valve plate 4 and the valve seat 2.

[0038] As described above, a first sealing ring 5 is provided between the valve plate 4 and the valve seat 2. Optionally, the valve seat 2 is a cylindrical structure and is installed in the valve body 1 along the axial direction of the valve body 1. Correspondingly, the opposite end faces of the valve seat 2 are perpendicular to the axial direction of the valve body 1. To further improve the reliability of the sealing fit between the valve plate 4 and the valve seat 2, in a specific embodiment of this application, the end face of the valve seat 2 facing the valve plate 4 can be inclined relative to the cross-section of the valve body 1, wherein the cross-section of the flow channel is the cross-section of the valve body 1 perpendicular to the axial direction of the valve body 1. At the same time, in the axial direction of the flow channel, the rotating end of the valve plate 4 that is rotatably connected to the bracket 3 is located upstream of the free end of the valve plate 4. Figure 1 For example, the rotating end of the valve plate 4 is the upper end of the valve plate 4, and the free end of the valve plate 4 is the lower end of the valve plate 4.

[0039] When the above technical solution is adopted, without considering other external forces, the valve plate 4 is inclined relative to the axial direction of the flow channel due to the influence of the aforementioned end face of the valve seat 2. The valve plate 4's own weight and center of gravity position give it an initial preload. Under this initial preload, the valve plate 4 can be pressed against the valve seat 2, and a certain compressive force exists between them, further improving the sealing effect. Furthermore, the initial preload also allows the valve seat 2 to abut against the valve body 1, further enhancing the assembly stability between the valve seat 2 and the valve body 1.

[0040] In the valve disclosed in this application, the valve seat 2 can generally be a cylindrical structure. To improve the assembly stability between the valve seat 2 and the valve body 1, in a specific embodiment of this application, the valve seat 2 can be a stepped cylindrical structure as a whole. Specifically, as follows... Figure 1 As shown, the valve seat 2 can include a first seat body and a second seat body, wherein the first seat body and the second seat body are distributed along the axial direction of the flow channel and are interconnected. The diameter of the second seat body is larger than the diameter of the first seat body, and the valve plate 4 is located on the side of the second seat body opposite to the first seat body. Correspondingly, to ensure relatively high assembly reliability and stability between the valve body 1 and the aforementioned valve seat 2, the flow channel can include a first branch and a second branch, wherein the first branch and the second branch are distributed along the aforementioned axial direction and are interconnected. During the assembly of the valve seat 2 and the valve body 1, the first seat body is embedded in the first branch, and the second seat body is embedded in the second branch. This allows both the first and second seat bodies to form a certain axial limiting relationship with their corresponding positions in the valve seat 2, further improving the assembly stability between the valve seat 2 and the valve body 1.

[0041] As described above, the valve seat 2 and the valve body 1 can be connected to each other using a clearance fit assembly method. However, the gap between the valve seat 2 and the valve body 1 cannot be too large to prevent them from failing to form an effective sealing fit. Based on the above embodiments, in order to ensure that the gap between them can form a sealing relationship, in this embodiment, a second sealing ring 7 can be provided in the fit gap between the valve seat 2 and the valve body 1. The second sealing ring 7 can be sleeved outside the valve seat 2, and after the valve seat 2 and the valve body 1 are assembled, the second sealing ring 7 can be pressed between the valve seat 2 and the valve body 1, thereby providing a sealing effect for the gap between them.

[0042] To further improve the sealing reliability between the valve seat 2 and the valve body 1, in another embodiment of this application, a plurality of second sealing rings 7 are fitted over the valve seat 2, and the plurality of second sealing rings 7 are spaced apart along the axial direction of the flow channel. Correspondingly, after the valve seat 2 and the valve body 1 are assembled, each second sealing ring 7 is sandwiched between the valve seat 2 and the valve body 1. Obviously, under the combined action of the plurality of second sealing rings 7, the sealing effect between the valve seat 2 and the valve body 1 can be greatly improved. Of course, the second sealing ring 7 can be a traditional O-ring, or a retaining ring can be provided upstream of the second sealing ring 7, or the second sealing ring 7 can also be a lip seal.

[0043] As described above, the valve plate 4 is rotatably mounted on the bracket 3. Typically, the valve plate 4 and the bracket 3 can be connected by a shaft-hole fit structure to form a rotational fit relationship. In a specific embodiment of this application, the valve plate 4 may include a plate body and a lifting lug. The plate body is located downstream of the valve seat 2 and is used for a sealing fit with the valve seat 2. The lifting lug is used to form a rotational connection relationship between the valve plate 4 and the bracket 3. The lifting lug has a circular hole 41 that passes through the lifting lug, and the rotating shaft 8 is installed in the circular hole 41.

[0044] Correspondingly, the bracket 3 is provided with mating holes and through holes. The shape of the mating hole can be adapted to the shape of the valve plate 4, and the size of the mating hole is smaller than the size of the valve plate 4. This allows the surface of the valve plate 4 facing away from the valve seat 2 to be locked in place with the bracket 3, ensuring that the valve plate 4 will not come out of the mating hole. More specifically, the center of the mating hole on the bracket 3 can be eccentrically set. In this case, when the valve plate 4 is in the open state, the larger valve plate 4 can completely cover the mating hole, reducing the space for fluid to flow upward, thereby reducing the generation of turbulence and improving the swing stability of the valve plate 4. At the same time, through holes are connected to both sides of the mating hole, and the other end of each through hole extends to the outer surface of the bracket 3 to facilitate the installation of the rotating shaft 8.

[0045] Based on the above structure, during the installation of the valve plate 4, the valve plate 4 can be installed from below the bracket 3. At the same time, after the round hole 41 on the lifting lug of the valve plate 4 is aligned with the two through holes, the rotating shaft 8 can be inserted into the through holes and the round hole 41 of the lifting lug, so that the rotating shaft 8 is supported in the two through holes. This ensures that the valve plate 4 and the bracket 3 form a stable assembly relationship, while also ensuring that the valve plate 4 has the ability to rotate relative to the bracket 3.

[0046] To prevent the rotating shaft 8 from dislodging from the perforation during valve operation, in this embodiment, the bracket 3 is further provided with limiting holes, and each perforation is correspondingly provided with a limiting hole, with each limiting hole extending from the upper surface of the bracket 3 to communicate with the corresponding perforation. In this case, the valve also includes limiting pins 9, and each limiting hole is correspondingly installed with a limiting pin 9, so that the rotating shaft 8 can be limited between two limiting pins 9 in the extending direction of the rotating shaft 8. On the one hand, this can limit the left and right movement of the rotating shaft 8 relative to the bracket 3, reduce the wear of the rotating shaft 8, and ensure high positional stability of the rotating shaft 8. On the other hand, it can also minimize the fluid entering the circular hole 41 of the valve plate 4 and the perforation of the bracket 3, ensuring that the rotational fit between the valve plate 4 and the bracket 3 remains relatively stable.

[0047] Considering the frequent relative rotation between the valve plate 4 and the bracket 3 during valve use, in order to improve the service life of the valve plate 4 and the bracket 3, in a specific embodiment of this application, a first wear-resistant sleeve 10 can be fitted over the rotating shaft 8, and a second wear-resistant sleeve 11 can be embedded in each of the through holes, so that the first wear-resistant sleeve 10 and each of the second wear-resistant sleeves 11 are rotatably engaged, which can reduce the wear rate of the rotating shaft 8 and the bracket 3. In a specific embodiment of this application, the first wear-resistant sleeve 10 can be formed of a non-metallic material, and the second wear-resistant sleeve 11 can be formed of hard alloy or ordinary alloy steel. Furthermore, the wear resistance of the second wear-resistant sleeve 11 can be further improved by performing special surface treatment. In addition, the surface of the rotating shaft 8 can be specially treated to improve the surface hardness of the rotating shaft 8 without reducing its toughness, and to improve its corrosion resistance.

[0048] Furthermore, two circular protrusions 12 can be provided on the outer periphery of the first wear-resistant sleeve 10. With a suitable interference fit, this ensures that the first wear-resistant sleeve 10 can rotate freely within the hole of the second wear-resistant sleeve 11. The interference fit design also prevents a large number of media particles from entering the mating clearance between the first and second wear-resistant sleeves 10 and 11, thus extending their service life. Additionally, by designing reasonable tolerance clearances, the movement allowance between the valve plate 4, the rotating shaft 8, and the bracket 3 can be left in the gap between the rotating shaft 8 and the bracket 3, i.e., in the area where the first and second wear-resistant sleeves 10 and 11 are located. This reduces the mating clearance between the valve plate 4 and the rotating shaft 8, thereby reducing wear and extending their service life.

[0049] Based on the valves disclosed in the embodiments of this application, this application also discloses a fracturing device, which includes any of the above valves. Of course, the fracturing device may also include other devices and mechanisms such as pipeline structures. Considering the brevity of the text, they will not be described one by one here.

[0050] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. Furthermore, it should be noted that the scope of the methods and apparatuses in the embodiments of this application is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in the reverse order, depending on the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

[0051] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A valve used in fracturing equipment, characterized in that, The valve includes a valve body, a valve seat, a bracket, a valve plate, and a first sealing ring. The valve body has a flow channel and a mounting hole that are interconnected. The valve seat is embedded in the flow channel and has a through hole that communicates with the flow channel. The bracket is fixedly and sealed in the mounting hole. The valve plate is rotatably mounted on the bracket and is located downstream of the valve seat. The first sealing ring is provided between the valve plate and the valve seat, and the valve plate is sealed to the valve seat through the first sealing ring.

2. The valve according to claim 1, characterized in that, The valve seat and the valve body are clearance-fitted; the valve also includes a positioning pin, the side wall of the valve body is provided with a through hole, the valve seat is provided with a positioning blind hole, the positioning pin passes through the through hole and is inserted into the positioning blind hole, so as to fix the valve seat and the valve body in the axial direction of the flow channel.

3. The valve according to claim 1, characterized in that, The valve seat is inclined relative to the cross-section of the valve body at one end facing the valve plate, and in the axial direction of the flow channel, the rotating end of the valve plate that is rotatably connected to the bracket is located upstream of the free end of the valve plate.

4. The valve according to claim 1, characterized in that, The valve seat has a limiting groove on one end face facing the valve plate. The limiting groove is a closed ring structure, and a portion of the first sealing ring is embedded in the limiting groove.

5. The valve according to claim 4, characterized in that, The valve also includes a third sealing ring, which is fixedly installed on the side surface of the valve plate facing the valve seat. The third sealing ring is arranged around the first sealing ring, and the protrusion height of the third sealing ring relative to the valve plate is less than the protrusion height of the first sealing ring relative to the valve seat.

6. The valve according to claim 1, characterized in that, The valve seat includes a first seat body and a second seat body, which are distributed along the axial direction of the flow channel and connected to each other. The diameter of the second seat body is larger than the diameter of the first seat body, and the valve plate is located on the side of the second seat body away from the first seat body. The flow channel includes a first branch and a second branch, which are distributed along the axial direction and are interconnected. The first seat is embedded in the first branch, and the second seat is embedded in the second branch.

7. The valve according to claim 1, characterized in that, The valve includes a second sealing ring, and a plurality of second sealing rings are sleeved outside the valve seat. The plurality of second sealing rings are spaced apart along the axial direction of the flow channel, and each second sealing ring is sandwiched between the valve seat and the valve body.

8. The valve according to claim 1, characterized in that, The valve includes a rotating shaft and a limiting pin; The bracket is provided with a mating hole, a through hole and a limiting hole. The mating hole is provided through the bracket and the through hole is connected to both sides of the mating hole. Each through hole is provided with a corresponding limiting hole and each limiting hole extends from the upper surface of the bracket to communicate with the corresponding through hole. The valve plate has a circular hole through which the rotating shaft passes. The valve plate and the mating hole are arranged opposite to each other, and the two opposite ends of the rotating shaft are respectively rotatably installed in the two through holes. Each of the limiting holes is equipped with a limiting pin, and the rotating shaft is limited between the two limiting pins in the extending direction of the rotating shaft.

9. The valve according to claim 8, characterized in that, The rotating shaft is fitted with a first wear-resistant sleeve, and each of the perforations is fitted with a second wear-resistant sleeve. The first wear-resistant sleeve and each of the second wear-resistant sleeves are rotatably engaged.

10. A fracturing device, characterized in that, Includes the valve described in any one of claims 1-9.

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