Valve

Abstract

The utility model discloses a valve and belongs to the technical field of oil and gas exploitation, in the valve, a valve body is provided with a valve cavity, mounting cavities and flow channels, the mounting cavities are formed in the two opposite sides of the valve cavity, the flow channels are formed in the sides, away from the valve cavity, of the mounting cavities, and the flow channels communicate with the valve cavity through the mounting cavities; a valve seat is mounted in each mounting cavity, the valve plate is movably mounted in the valve cavity, the outer side of each valve seat is sleeved with a sealing ring, and the valve seats are in sealing fit with the valve body through the sealing rings; each valve seat is provided with a containing notch, the containing notches are formed by sinking from the peripheral faces of the valve seats, scraping rings are installed in the containing notches, and the surfaces of the sides, facing the valve plate, of the scraping rings are used for scraping the corresponding side faces in the valve plate. According to the valve, the problem that in the fracturing working process, fracturing sand attached to the two sides of the valve plate of the valve is likely to be brought into the inner cavity of the valve body along with movement of the valve plate, and consequently the valve works abnormally can be solved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of oil and gas exploitation, and particularly relates to a valve. BACKGROUND

[0002] The flat plate valve is widely applied in oil and gas exploitation equipment, which comprises a valve body, a valve seat and a valve plate. The valve seat is installed in the valve body, and the valve plate is movably matched with the valve seat, so that the opening and closing of the valve can be realized by changing the position of the valve plate relative to the valve seat. Since the pressure at the pipeline and the valve during the fracturing process is usually relatively large, and the fracturing fluid contains particles such as fracturing sand, a small amount of fracturing sand will be left on the opposite sides of the valve plate after the completion of the fracturing operation, which causes the fracturing sand to be brought into the inner cavity of the valve body by the valve plate when the valve plate moves relative to the valve seat for opening and closing, resulting in abnormal operation of the valve. CONTENT OF THE UTILITY MODEL

[0003] The purpose of the embodiment of the application is to provide a valve to solve the problem that the fracturing sand adhered to the two sides of the valve plate of the valve is easily brought into the inner cavity of the valve body along with the movement of the valve plate during the fracturing operation, causing abnormal operation of the valve.

[0004] The embodiment of the application discloses a valve, which comprises a valve body, a valve seat, a valve plate, a sealing ring and a scraping ring.

[0005] The valve body has a valve cavity, a mounting cavity and a flow channel. The opposite sides of the valve cavity are each provided with the mounting cavity, and the side of each mounting cavity away from the valve cavity is provided with the flow channel. The flow channel is communicated with the valve cavity through the mounting cavity.

[0006] Each mounting cavity is provided with the valve seat, and the valve plate is movably installed in the valve cavity. The outer side of each valve seat is provided with a sealing ring, and the valve seat is sealingly matched with the valve body through the sealing ring.

[0007] Each valve seat is provided with a receiving notch, and the receiving notch is recessed from the outer circumferential surface of the valve seat. Each receiving notch is provided with the scraping ring, and the side surface of each scraping ring facing the valve plate is used to scrape the corresponding side surface of the valve plate.

[0008] The valve body of the valve has a valve cavity, and the opposite sides of the valve cavity are each provided with a mounting cavity. The side of each mounting cavity away from the valve cavity is provided with a flow channel, and each flow channel can be communicated with the valve cavity through the corresponding mounting cavity, so that the fluid can flow between the flow channels on the opposite sides of the valve cavity when the valve plate avoids the valve cavity.

[0009] Meanwhile, each installation cavity is provided with a valve seat, and the valve plate is movably installed in the valve cavity, so that the valve plate can realize plugging of the valve cavity in a sealing fit mode with the valve seat, so as to isolate the flow channels on the opposite sides of the valve cavity. Moreover, the outer side of each valve seat is sleeved with a sealing ring, so that the valve seat can form a sealing fit relationship with the valve body through the corresponding sealing ring, preventing the fluid in the flow channel from entering the inner cavity of the valve body through the gap between the valve seat and the valve body.

[0010] In addition, in the embodiments of the present application, each valve seat is also provided with an accommodation notch, and the accommodation notch is recessed from the outer circumferential surface of the valve seat. A scraper ring is installed in each accommodation notch. By making the side surface of each scraper ring facing the valve plate rub against the corresponding side surface of the valve plate, the scraper rings on the opposite sides of the valve plate can provide scraping action for the opposite side surfaces of the valve plate during the process of moving the valve plate relative to the valve body to open and close the valve, so that the particles adhered to the opposite side surfaces of the valve plate can be retained on the inner side of the valve seat, preventing the particles from entering the inner cavity of the valve body and adversely affecting the normal operation of the valve. Thus, the service life of the sealing ring can be improved, the number of grease injection can be reduced, and even the grease injection operation between the sealing surfaces of the sealing ring can be avoided within a certain service time, thereby reducing the maintenance time of the valve and the number of maintenance personnel equipped for the valve, greatly reducing the manpower and material resources required during the use of the valve, reducing the operating cost, and improving the efficiency of fracturing operations and other work. BRIEF DESCRIPTION OF DRAWINGS

[0011] The drawings described herein are used to provide further understanding of the present application, and form a part of the present application. The schematic embodiments of the present application and their descriptions are used to explain the present application, and do not constitute an improper limitation on the present application. In the drawings:

[0012] Figure 1 A cross-sectional view of part of the structure of the valve disclosed in the embodiments of the present application;

[0013] Figure 2 A cross-sectional view of part of the structure of the valve disclosed in the embodiments of the present application; Figure 1 An enlarged view of part of the structure shown;

[0014] Figure 3 A cross-sectional view of the valve body in the valve disclosed in the embodiments of the present application;

[0015] Figure 4 A cross-sectional view of the valve seat in the valve disclosed in the embodiments of the present application.

[0016] LIST OF REFERENCES

[0017] 100-valve body, 110-inner cavity, 120-installation cavity, 130-flow channel, 140-fourth installation notch,

[0018] 200-valve seat, 210-receiving notch, 220-limiting groove, 231-first mounting notch, 232-second mounting notch, 233-third mounting notch, 234-fifth mounting notch,

[0019] 300-valve plate,

[0020] 410-sealing ring, 420-retainer ring,

[0021] 510-wiper ring, 520-limiting member, 530-guide plate, 540-dustproof ring, 541-vent hole, 550-elastic member,

[0022] 600-valve cover,

[0023] 700-valve stem. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work are within the scope of protection of the present application.

[0025] The terms "first", "second", and the like in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be exchanged under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first", "second", etc. are usually a class, not limited to the number of objects, for example, the first object can be one or more. In addition, "and / or" in the specification and claims indicates at least one of the connected objects, and the character " / ", generally indicates that the front and rear associated objects are in a "or" relationship.

[0026] As Figures 1-4 shown, the embodiments of the present application disclose a valve which can be applied to fracturing equipment and the like to serve as a pipe on-off control device. The valve includes a valve body 100, a valve seat 200, a valve plate 300, a sealing ring 410 and a wiper ring 510, of course, the valve can also generally include other structures such as a valve cover 600 and a valve stem 700, and for the sake of brevity, they will not be introduced one by one here.

[0027] The valve body 100 is the main structure of the valve, which has a valve cavity, and opposite sides of the valve cavity are provided with installation cavities 120, each installation cavity 120 is communicated with the valve cavity, and each installation cavity 120 is provided with a flow channel 130 on the side away from the valve cavity, and the flow channel 130 is communicated with the corresponding installation cavity 120, that is, the flow channel 130 and the installation cavity 120 located on the same side of the valve cavity are communicated with each other, and correspondingly, each flow channel 130 can be communicated with the valve cavity through the corresponding installation cavity 120, so that the fluid medium can pass through the installation cavity 120 and the valve cavity through the flow channel 130 on one side of the valve cavity, and flow to the installation cavity 120 and the flow channel 130 on the other side of the valve cavity. Of course, when it is necessary to limit the flow of fluid between the flow channels 130 on the opposite sides of the valve cavity, the valve plate 300 can be controlled to move relative to the valve body 100 to block the valve cavity of the valve body 100 by the valve plate 300. The direction in which the fluid flows in the valve is the axial direction of the valve, and this direction is also the distribution direction of the installation cavities 120.

[0028] In the valve, the device directly sealed with the valve plate 300 to achieve isolation of the flow channels 130 on both sides of the valve cavity is the valve seat 200, and therefore, in the valve, the valve seat 200 is installed in each installation cavity 120, and the valve seat 200 has a ring structure as a whole, and the inner side channel is communicated with the flow channel 130 and the valve cavity, so that the flow channels 130 on both sides of the valve cavity can still be normally communicated when the valve plate 300 is not sealed with the valve seat 200. Correspondingly, in the valve disclosed in the embodiment of the present application, the valve body 100 is movably installed in the valve cavity, and the valve body 100 is further connected with the valve rod 700, so that under the driving of the external force acting on the valve rod 700, the valve body 100 can move linearly relative to the valve cavity to achieve the purpose of blocking the valve cavity and opening the valve cavity. In the valve, when the valve plate 300 is in an open state, a part of the valve plate 300 is located in the inner cavity 110 of the valve, the inner cavity 110 is located on the side of the valve body 100 close to the valve cover 600, and the valve body 100 and the valve cover 600 surround the inner cavity 110, and of course, a part of the valve rod 700 is also located in the inner cavity 110.

[0029] At the same time, in order to ensure that the sealing performance between the valve seat 200 and the valve body 100 is relatively good, so as to prevent the fluid in the flow channel 130 from flowing into the inner cavity 110 of the valve body 100 from the gap between the valve seat 200 and the valve body 100, in the valve disclosed in the embodiment of the present application, the outer side of each valve seat 200 is sleeved with a sealing ring 410, so that the valve seat 200 can be sealed with the valve body 100 through the sealing ring 410.

[0030] Specifically, the sealing ring 410 can be formed of rubber or the like, and in one embodiment of the present application, the sealing ring 410 can be a V-shaped sealing ring including a support ring and a spring, the support ring is usually formed of polyether ether ketone or polytetrafluoroethylene or the like, and the spring is usually formed of metal material. The support ring is V-shaped as a whole, and the spring abuts against the inside of the support ring to extrude the two sealing surfaces of the support ring away from each other, expand the size of the V-shaped opening of the support ring, and thus enable the sealing ring 410 to have a self-sealing capability. At the same time, by making the V-shaped opening of the sealing ring 410 face the high-pressure side, after the fluid invades into the gap, the fluid can further drive the V-shaped opening of the sealing ring 410 to expand further, so that the sealing lip of the sealing ring 410 is more tightly fitted between the two sealing surfaces, and the sealing performance of the sealing member is further improved.

[0031] At the same time, in the valve disclosed in the embodiments of the present application, each valve seat 200 is provided with a receiving notch 210, the receiving notch 210 is recessed from the outer circumferential surface of the valve seat 200, and the receiving notch 210 extends to the side surface of the valve seat 200 facing the valve plate 300. In one embodiment of the present application, each receiving notch 210 is a closed annular structure, that is, the receiving notch 210 surrounds the valve seat 200 along the circumference of the valve seat 200, in which case the scraper ring 510 can also be a closed annular structure, and the scraper ring 510 can be installed in the receiving notch 210.

[0032] In detail, each receiving notch 210 of each valve seat 200 is installed with a scraper ring 510, and the side surface of the scraper ring 500 facing the valve plate 300 can be scraped with the corresponding side surface of the valve plate 300. Specifically, the side surface of each scraper ring 510 facing the valve plate 300 can be arranged coplanar with the side surface of the corresponding valve seat 200 facing the valve plate 300, which enables each scraper ring 510 to provide scraping effect for the valve plate 300 to prevent the particles such as fracturing sand adhered to the surfaces on both sides of the valve plate 300 from being brought into the inner cavity 110 of the valve body 100 with the movement of the valve plate 300 relative to the valve seat 200. Of course, in the embodiments of the present application, the side surface of each scraper ring 510 facing the valve plate 300 can also be arranged slightly outward relative to the side surface of the corresponding valve seat 200 facing the valve plate 300, in which case the scraping effect of the scraper ring 510 is relatively better. It should be noted that the outward extension size of the scraper ring 510 relative to the valve seat 200 cannot be too large, and needs to be determined flexibly according to the specific assembly gap between the valve plate 300 and the valve seat 200 and the like. For the convenience of explanation, the following will be described by way of example with the side surface of the valve plate 300 and the side surface of the valve seat 200 being flush, that is, coplanar.

[0033] More intuitively, the accommodating recess 210 is located in the outer wall of the valve seat 200 close to the valve plate 300, and the outer diameter of the accommodating recess 210 is smaller than the outer diameter of the valve seat 200, so that the accommodating recess 210 is concave inwardly along the radial direction of the valve seat 200 from the outer peripheral surface of the valve seat 200 as a whole. Correspondingly, by designing the outer diameter of the accommodating recess 210 and the inner diameter of the scraping ring 510, the scraping ring 510 can be sleeved outside the valve seat 200 and located at the accommodating recess 210, so as to ensure that the scraping ring 510 and the valve seat 200 form a relatively stable assembly relationship. In addition, the side surface of the scraping ring 510 away from the valve plate 300 can be limited by the side inner wall of the accommodating recess 210 facing the valve plate 300, so that the scraping ring 510 and the valve seat 200 are limited in the distribution direction of the mounting cavity 120, thereby preventing the scraping ring 510 from moving away from the valve plate 300 relative to the valve seat 200 during the operation of the valve, and losing the ability to scrape the particles on the surface of the valve plate 300.

[0034] Of course, the shape and size of the accommodating recess 210 formed on each valve seat 200 can be the same or different, which is not limited herein. During the assembly of each scraping ring 510 and each valve seat 200, it is necessary to ensure that the surface of the valve plate 300 facing the scraping ring 510 mounted on the valve seat 200 on the opposite side is coplanar with the side surface of the corresponding valve seat 200 facing the valve plate 300, so as to ensure that the particles on the surface of the valve plate 300 on the opposite side can be scraped by the corresponding scraping ring 510, preventing the particles on the valve plate 300 from being brought into the inner cavity 110 of the valve body 100 with the movement of the valve plate 300, thereby ensuring that the service life of the valve is relatively long.

[0035] The valve disclosed in the embodiment of the present application has a valve body 100 with a valve cavity, and mounting cavities 120 are arranged on opposite sides of the valve cavity. Each mounting cavity 120 is provided with a flow passage 130 away from the valve cavity, and each flow passage 130 can communicate with the valve cavity through the corresponding mounting cavity 120, so that the fluid can flow between the flow passages 130 on opposite sides of the valve cavity when the valve plate 300 avoids the valve cavity.

[0036] Meanwhile, each mounting cavity 120 is provided with a valve seat 200, and the valve plate 300 is movably mounted in the valve cavity, so that the valve plate 300 can seal with the valve seat 200 to block the valve cavity and isolate the flow passages 130 on opposite sides of the valve cavity. In addition, the outer side of each valve seat 200 is sleeved with a sealing ring 410, so that the valve seat 200 can form a sealing fit with the valve body 100 through the corresponding sealing ring 410, preventing the fluid in the flow passage 130 from entering the inner cavity 110 of the valve body 100 through the gap between the valve seat 200 and the valve body 100.

[0037] In addition, in the embodiments of the present application, each valve seat 200 is further provided with a receiving gap 210, and the receiving gap 210 is recessed from the outer circumferential surface of the valve seat 200, and each receiving gap 210 is mounted with a scraping ring 510, and by making each scraping ring 510 scrape the corresponding side surface of the valve plate 300, the scraping ring 510 on the opposite sides of the valve plate 300 can provide scraping action for the opposite side surfaces of the valve plate 300, so that the particles adhered to the opposite side surfaces of the valve plate 300 can be retained on the inner side of the valve seat 200, preventing the particles from entering the inner cavity 110 of the valve body 100 and adversely affecting the normal operation of the valve, thereby prolonging the service life of the sealing ring 410, reducing the number of times of injecting the sealing grease, and even eliminating the need for grease injection between the sealing surfaces of the sealing ring 410 within a certain service time, thereby reducing the maintenance time of the valve and the number of maintenance personnel, greatly reducing the manpower and material resources required during the use of the valve, reducing operating costs, and improving the efficiency of fracturing operations and other work.

[0038] As described above, the receiving gap 210 can have an end surface facing the valve plate 300, and the side end surface of the scraping ring 510 facing away from the valve plate 300 is limited by the aforementioned end surface of the receiving gap 210, thereby limiting the axial movement of the scraping ring 510 relative to the valve seat 200, preventing the scraping ring 510 from retreating relative to the valve plate 300 and failing to normally provide scraping action for the valve plate 300.

[0039] In another embodiment of the present application, the valve seat 200 can further be provided with a limiting groove 220, and the limiting groove 220 is formed at the bottom of the receiving gap 210, that is, the limiting groove 220 is further recessed inward along the radial direction of the valve seat 200 from the bottom of the receiving gap 210 (i.e. the outer circumferential surface of the area of the valve seat 200 where the receiving gap 210 is located), which further reduces the outer diameter of the part where the limiting groove 220 is located. In this case, the valve disclosed in the embodiments of the present application can further include a limiting member 520, and the limiting member 520 is fixedly connected to the inner wall of the scraping ring 510, in other words, the limiting member 520 is located on the inner side of the scraping ring 510, and by accommodating the limiting member 520 in the limiting groove 220, the limiting member 520 can be limited by the limiting groove 220 in the distribution direction of the installation cavity 120, thereby ensuring that the scraping ring 510 and the valve seat 200 form a relatively stable relative fixed relationship in the aforementioned distribution direction.

[0040] And, in the case of adopting the technical solutions disclosed in the embodiments of the present application, the structure of the accommodation notch 210 towards the side end face of the valve plate 300 is not limited. In other words, in the case of adopting the technical solutions disclosed in the embodiments of the present application, the side end face of the accommodation notch 210 towards the valve plate 300 must be limited in the distribution direction by the corresponding side face of the scraper ring 510, thereby reducing the processing difficulty of the entire valve seat 200. At the same time, since the limiting groove 220 is recessed relative to the accommodation notch 210, the size of the limiting groove 220 towards the side surface of the valve plate 300 in the radial direction of the valve seat 200 is relatively larger, thereby further improving the stability of the limiting fit between the valve seat 200 and the scraper ring 510 (and the limiting piece 520).

[0041] Specifically, the limiting groove 220 can be formed together with the accommodation notch 210, for example, the valve seat 200 can be formed by integral casting, thereby forming the accommodation notch 210 and the limiting groove 220 together during the formation of the valve seat 200, and the limiting groove 220 and the accommodation notch 210 are in communication with each other. Alternatively, a circular ring-shaped cylindrical valve seat blank can be formed first, then the accommodation notch 210 can be formed on the outer circumferential surface of the valve seat blank by cutting or machining, and then the limiting groove 220 can be formed on the bottom of the accommodation notch 210 by cutting or machining.

[0042] Similarly, the scraper ring 510 and the limiting piece 520 can also be formed by integral molding to reduce the processing difficulty of the two and improve the reliability of the fixed connection between the scraper ring 510 and the limiting piece 520. In this case, the scraper ring 510 and the limiting piece 520 have no obvious boundary in structure, but have some difference in function. In the radial direction of the scraper ring 510, the limiting piece 520 protrudes from the inner wall of the scraper ring 510, so that the side surface of the limiting piece 520 towards the valve plate 300 and the side surface of the limiting piece 520 away from the valve plate 300 can be matched with the corresponding two end faces of the limiting groove 220 respectively, so as to form a stable limiting fit between the scraper ring 510 and the valve seat 200 in the distribution direction of the installation cavity 120.

[0043] Alternatively, the number of limiting pieces 520 is multiple, and the multiple limiting pieces 520 can be spaced and uniformly distributed along the circumference of the scraper ring 510. Correspondingly, the number of limiting grooves 220 provided on the valve seat 200 is also multiple, and the shape and size of the multiple limiting grooves 220 are the same as those of the limiting piece 520. Of course, the number of limiting grooves 220 can be the number of limiting pieces 520 to reduce the installation difficulty of the scraper ring 510.

[0044] In another embodiment of the present application, the limiting recess 220 can be a closed ring structure, in which case, when the scraper ring 510 and the valve seat 200 need to be assembled, the limiting member 520 does not need to be aligned with the corresponding limiting recess 220, thereby reducing the assembly difficulty of the scraper ring 510. Further, the limiting member 520 can also be a closed ring structure, in which case, the scraper ring 510 can be limited by the corresponding part of the limiting member 520 at any position in the circumferential direction of the scraper ring 510, thereby improving the reliability of the limiting fit between the entire scraper ring 510 and the valve seat 200. In addition, in this case, the machining difficulty of the valve seat 200, the scraper ring 510 and the limiting member 520 can be further reduced.

[0045] In the case of using the above technical solutions, after the valve seat 200, the scraper ring 510 and the limiting member 520 are all machined, the scraper ring 510 can be pushed into the receiving notch 210 from the side of the valve seat 200 close to the valve plate 300, and by causing a certain expansion deformation of the scraper ring 510 in the circumferential direction, the limiting member 520 can be accommodated in the receiving notch 210. Under the further action of the pushing force, the limiting member 520 can move along the bottom surface of the receiving notch 210 away from the side of the valve seat 200 away from the valve plate 300, until the limiting member 520 extends into the limiting recess 220, that is, the assembly of the scraper ring 510 is completed.

[0046] As described above, in the case of providing the limiting recess 220 and the limiting member 520, there are fewer design restrictions for the end surface of the receiving notch 210 facing the valve plate 300. Therefore, in one specific embodiment of the present application, the valve seat 200 can also be provided with a first mounting notch 231, and the first mounting notch 231 is a closed ring structure. At the same time, the first mounting notch 231 is communicated to the side of the receiving notch 210 away from the valve plate 300, and in the radial direction of the valve seat 200, the bottom surface of the first mounting notch 231 is flush with or protrudes from the bottom surface of the receiving notch 210.

[0047] That is, taking the side of the valve seat 200 close to the valve plate 300 as the inner side and the side of the valve seat 200 away from the valve plate 300 as the outer side, the first mounting notch 231 is located on the outer side of the receiving notch 210. Accordingly, after the valve seat blank is machined, the first mounting notch 231 can be further formed on the outer side of the receiving notch 210 by cutting or other machining methods, and the first mounting notch 231 is communicated with the receiving notch 210. At the same time, the outer diameter of the first mounting notch 231 is greater than or equal to the outer diameter of the receiving notch 210, thereby ensuring that the first mounting notch 231 can be flush with or protrude from the receiving notch 210 as a whole.

[0048] Based on the above-mentioned embodiments of the present application, the sealing ring 410 can be installed in the first installation gap 231, and during the assembly of the valve seat 200, the sealing ring 410 can be installed from the valve seat 200 to the side of the valve plate. As described above, since the accommodation gap 210 is flush with or recessed in the first installation gap 231, the outer diameter of the accommodation gap 210 is relatively small (at most equal to the outer diameter of the first installation gap 231), in this case, the sealing ring 410 can be first sleeved in the position of the accommodation gap 210 in the valve seat 200, and then under the action of the pushing force, the sealing ring 410 can be installed into the first installation gap 231, which can reduce the installation difficulty of the sealing ring 410.

[0049] Of course, in the embodiments of the present application, in order to ensure that the sealing effect of the sealing ring 410 is relatively good, when the sealing ring 410 adopts a V-shaped sealing ring, the outer diameter of the first installation gap 231 can be greater than the inner diameter of the sealing ring 410, so that after the sealing ring 410 is installed in the first installation gap 231, the inner wall of the sealing ring 410 can be in a pressing fit with the bottom surface of the first installation gap 231, ensuring that the stability of the sealing effect between the sealing ring 410 and the valve seat 200 is relatively high.

[0050] In addition, in the case that the valve seat 200 is provided with the first installation gap 231, a part of the scraping ring 510 can also extend into the first installation gap 231, in this case, on the one hand, the cooperation reliability between the scraping ring 510 and the valve seat 200 can be further improved, on the other hand, the scraping ring 510 can also provide a certain axial limiting action for the sealing ring 410 installed in the first installation gap 231, so that in the distribution direction of the installation cavity 120, one end of the sealing ring 410 installed in the first installation gap 231 can be limited by the scraping ring 510, and the other end can be limited by the side surface of the first installation gap 231 facing the valve plate 300, thereby the assembly stability of the sealing ring 410 is relatively high, so as to further improve the sealing reliability of the sealing ring 410.

[0051] In addition, in the case that the sealing ring 410 adopts a V-shaped sealing ring, the lip of the sealing ring 410 installed in the first installation gap 231 can face the valve plate 300, so as to prevent the fluid in the gap between the valve plate 300 and the valve seat 200 from entering the gap between the valve seat 200 and the valve body 100. In this case, the valve disclosed in the embodiments of the present application can also be provided with a second installation gap 232, the second installation gap 232 is recessed inward along the radial direction of the valve seat 200 from the outer wall of the valve seat 200, and the second installation gap 232 extends to the side surface of the valve seat 200 away from the valve plate 300.

[0052] In this case, by making the second installation gap 232 also a closed ring structure, another sealing ring 410 can be correspondingly installed in the second installation gap 232, and under the action of the sealing ring 410, the sealing purpose of the gap between the side surface of the valve seat 200 facing away from the valve plate 300 and the valve body 100 can be achieved. Similarly, in the case of a V-shaped sealing ring 410, the lip of the sealing ring 410 can be arranged to face away from the valve plate 300, so that the lip of the sealing ring 410 is directed toward the other high-pressure side of the valve seat 200, to provide a good and stable sealing effect for the gap between the side surface of the valve seat 200 facing away from the valve plate 300 and the valve body 100. Of course, in this case, the outer diameter of the second installation gap 232 can also be greater than the inner diameter of the sealing ring 410, so that when the sealing ring 410 is installed in the second installation gap 232, the inner wall of the sealing ring 410 can be in a pressing fit with the bottom surface of the second installation gap 232, to ensure that the sealing connection relationship between the two is relatively good in terms of persistence.

[0053] In the case of the valve seat 200 provided with the second installation gap 232 described above, when the sealing ring 410 needs to be installed, a certain pressing force can be applied to the sealing ring 410 to press the spring in the sealing ring 410, and thus the inner diameter of the sealing ring 410 is increased. In this case, the sealing ring 410 is pushed into the second installation gap 232 from the side of the valve seat 200 facing away from the valve plate 300, the sealing ring 410 is released, and the pushing force is continuously applied to the sealing ring 410 to install the sealing ring 410 in place.

[0054] Furthermore, in the distribution direction of the installation cavity 120, the size of the second installation gap 232 can be slightly larger than the size of the sealing ring 410 in the corresponding direction, and thus after the sealing ring 410 is installed in the second installation gap 232, the sealing ring 410 can be substantially limited between the side surface of the second installation gap 232 facing away from the valve plate 300 and the side surface of the valve body 100 facing toward the valve plate 300, so that the sealing ring 410 is substantially prevented from being axially displaced during the operation of the valve.

[0055] In another embodiment of the present application, the retaining ring 420 can also be arranged in the second installation gap 232, and the retaining ring 420 is arranged on the side of the sealing ring 410 away from the valve plate 300. Thus, after the installation of the sealing ring 410 in the second installation gap 232 is completed, the retaining ring 420 can be further installed in the second installation gap 232, and the retaining ring 420 is fixed with the valve seat 200. Thus, the retaining ring 420 provides a limiting effect for the sealing ring 410, and the retaining ring 420 also provides a shielding and protection effect for the sealing ring 410. The fluid in the gap between the valve seat 200 and the valve body 100 away from the valve plate 300 cannot enter the lip of the sealing ring 410, so as to corrode and damage the spring of the sealing ring 410. Thus, the service life of the sealing ring 410 is relatively longer.

[0056] As described above, the sealing ring 410 can be used to limit the fluid entering the inner cavity 110 of the valve body 100 through the gap between the valve body 100 and the valve seat 200. In order to further improve the blocking effect between the gap between the valve body 100 and the valve seat 200 and the flow passage 130 of the valve body 100, in a specific embodiment of the present application, the valve seat 200 can also be provided with a third installation gap 233, and the third installation gap 233 is recessed from the inner wall of the valve seat 200 towards the flow passage 130. That is, in the radial direction of the valve seat 200, the third installation gap 233 is located on the inner side of the valve seat 200, and the third installation gap 233 extends outward from the inner wall of the valve seat 200 in the radial direction of the valve seat 200. In other words, the inner diameter of the area in the valve seat 200 where the third installation gap 233 is located is greater than the inner diameter of the area in the valve seat 200 where the third installation gap 233 is not arranged. At the same time, the fourth installation gap 140 is arranged on the valve body 100, and the fourth installation gap 140 is recessed from the side wall of the flow passage 130 of the valve body 100 outward in the radial direction of the valve seat 200. Based on this, since the recess directions of the fourth installation gap 140 and the third installation gap 233 are the same, both extend outward in the radial direction of the valve seat 200. Therefore, the extension sizes of the two are also comparable, that is, the bottoms of the third installation gap 233 and the fourth installation gap 140 are arranged substantially flush, so as to ensure that the fitting effects of the two with the dustproof ring 540 are relatively good.

[0057] In the embodiment of the present application, the third mounting gap 233 and the fourth mounting gap 140 are both closed annular structures, in which case, the valve disclosed in the embodiment of the present application can further comprise a dustproof ring 540, and a part of the dustproof ring 540 is accommodated in the third mounting gap 233, and another part of the dustproof ring 540 is accommodated in the fourth mounting gap 140. By making the outer wall of the dustproof ring 540 abut against the valve seat 200 and the valve body 100, the dustproof ring 540 can block the assembly gap formed between the surface of the valve seat 200 away from the valve plate 300 and the surface of the valve body 100, so as to further prevent particulate matter and most of the fluid from entering the gap between the valve seat 200 and the valve body 100 through the flow passage 130, which can greatly reduce the sealing pressure of the sealing ring 410, and can further reduce the probability and degree of fluid entering the inner cavity 110 of the valve body 100 through the gap between the valve seat 200 and the valve body 100.

[0058] Of course, in order to ensure that the cooperation stability between the dustproof ring 540 and the valve seat 200 and the valve body 100 is always relatively good, in the embodiment of the present application, the outer diameter of the dustproof ring 540 can be slightly larger than the inner diameter of the third mounting gap 233 and the fourth mounting gap 140, so that after the installation of the dustproof ring 540 is completed, the dustproof ring 540 and the valve seat 200 and the valve body 100 are all in a mutual extrusion cooperation state, in which case, on the one hand, the abutment relationship between the outer wall of the dustproof ring 540 and the valve body 100 and the valve seat 200 is relatively reliable and durable, and on the other hand, the axial movement of the dustproof ring 540 relative to the valve body 100 is limited, so as to further ensure that the dustproof ring 540 can long block the gap between the valve body 100 and the valve seat 200. Of course, in other embodiments of the present application, the size of the third mounting gap 233 and the fourth mounting gap 140 in the distribution direction of the mounting cavity 120 can be designed according to the axial size of the dustproof ring 540 and other actual conditions, so that after the dustproof ring 540 is installed in the third mounting gap 233 and the fourth mounting gap 140, the dustproof ring 540 can basically form a limiting cooperation relationship with the valve body 100 and the valve seat 200 in the distribution direction of the mounting cavity 120, so as to prevent the dustproof ring 540 from moving axially during the operation of the valve, and cause the problem of failure of the gap between the valve body 100 and the valve seat 200.

[0059] As described above, after the dustproof ring 540 is installed in the third mounting gap 233 and the fourth mounting gap 140, the outer wall of the dustproof ring 540 can be in close contact with the valve seat 200 and the valve body 100, which makes the cooperation stability between the dustproof ring 540 and the valve body 100 and the valve seat 200 relatively high. In order to reduce the difficulty of disassembling the dustproof ring 540, so as to facilitate the replacement and maintenance of the dustproof ring 540, further, the dustproof ring 540 can be provided with a plurality of air holes 541, and each air hole 541 penetrates the dustproof ring 540 along the radial direction of the dustproof ring 540. That is, the inner side space of the dustproof ring 540 can be in communication with the outer side space of the dustproof ring 540 through any air hole 541. In this case, when the dustproof ring 540 needs to be disassembled, by applying a certain force to the dustproof ring 540, the gas in the inner side of the dustproof ring 540 can flow to the outer side of the dustproof ring 540 through the air hole 541, thereby destroying the vacuum close contact relationship between the outer wall of the dustproof ring 540 and the valve seat 200 and the valve body 100, and facilitating the disassembly of the dustproof ring 540.

[0060] Specifically, the plurality of air holes 541 provided on the dustproof ring 540 can be spaced apart along the circumferential direction of the dustproof ring 540, and the plurality of air holes 541 distributed along the circumferential direction of the dustproof ring 540 can be referred to as a circle of air holes 541. Of course, two or three circles of air holes 541 can also be provided on the dustproof ring 540, which is not limited herein. However, in order to ensure the sealing effect of the dustproof ring 540 on the gap between the valve seat 200 and the valve body 100, the number of air holes 541 cannot be too large, that is, the distribution density of the air holes 541 on the dustproof ring 540 cannot be too large.

[0061] Further, in the valve disclosed in the embodiment of the present application, the air holes 541 on the dustproof ring 540 also need to avoid the gap between the valve seat 200 and the valve body 100, that is, the projection of each air hole 541 in the plane perpendicular to the axial direction of the air hole 541 is located on the valve body 100 or the valve seat 200, so as to ensure that the position of the air hole 541 on the outer wall of the dustproof ring 540 can be sealed by the surface of the valve seat 200 or the valve body 100, so that even if the fluid enters the air hole 541, it will not directly flow into the gap between the valve seat 200 and the valve body 100 through the air hole 541, causing the sealing effect of the dustproof ring 540 on the gap to fail.

[0062] As described above, in the valve disclosed in the embodiment of the present application, each valve seat 200 is provided with a scraper ring 510, and the side surface of the scraper ring 510 facing the valve plate 300 is coplanar with the side surface of the valve seat 200 facing the valve plate 300, and then the scraper ring 510 can scrape off the particles such as fractured sand on the opposite side surfaces of the valve plate 300, so as to prevent the particles from being brought into the inner cavity 110 of the valve body 100 with the movement of the valve plate 300, thereby affecting the normal work of the valve.

[0063] In order to further prevent the particles adhered to the valve plate 300 from being brought into the inner cavity 110 of the valve body 100 along with the movement of the valve plate 300, the valve disclosed in the embodiments of the present application can further comprise a guide plate 530, and each valve seat 200 can be provided with the guide plate 530. Of course, in order to ensure that the guide plate 530 can also provide scraping action for the valve plate 300, during the arrangement of the guide plate 530, the guide plate 530 can be arranged outside the scraping ring 510 mounted on the valve seat 200, and more specifically, the guide plate 530 can be mounted downstream of the scraping ring 510 according to the movement direction of the valve plate 300, so that during the opening of the valve plate 300, the valve plate 300 can be sequentially matched with the valve seat 200, the scraping ring 510 and the guide plate 530, so as to provide the valve plate 300 with multi-stage scraping action by the scraping ring 510 and the guide plate 530, and maximize the prevention of the particles such as fractured sand adhered to the opposite side surfaces of the valve plate 300, thereby preventing the particles from being brought into the inner cavity 110 of the valve along with the movement of the valve plate 300.

[0064] Of course, during the installation of the guide plate 530, the position of the guide plate 530 also needs to be designed. In detail, each guide plate 530 needs to be matched with the corresponding scraping ring 510, wherein the guide plate 530 and the scraping ring 510 corresponding to each other are the guide plate 530 and the scraping ring 510 located on the same side of the valve plate 300, in which case the particles adhered to the surface of the valve plate 300 can be prevented from entering the gap between the guide plate 530 and the scraping ring 510. At the same time, the side surface of the guide plate 530 facing the valve plate 300 needs to be able to scrape the corresponding side surface of the valve plate 300. Specifically, the side surface of the guide plate 530 facing the valve plate 300 can be arranged in the same plane as the side surface of the corresponding valve seat 200 facing the valve plate 300, so as to ensure that the guide plate 530 can normally provide scraping action for the valve plate 300, or the side surface of the guide plate 530 facing the valve plate 300 can be arranged slightly outward relative to the side surface of the corresponding valve seat 200 facing the valve plate 300, and the outward extension size can be flexibly selected according to the actual size of the assembly gap. Similarly, the guide plate 530 and the valve seat 200 corresponding to each other are the guide plate 530 and the valve seat 200 located on the same side of the valve plate 300.

[0065] As described above, the valve plate 300 is movably installed in the valve cavity of the valve, so that the valve plate 300 can move relative to the valve seat 200, and therefore, there must be an assembly gap between the opposite side surfaces of the valve plate 300 and the corresponding surfaces of the valve seat 200. In order to limit the fluid in the flow passage 130 of the valve from directly entering the inner cavity 110 of the valve body 100 through the gap between the valve plate 300 and the valve plate 300, in the embodiment of the present application, the valve seat 200 can also be provided with a fifth installation gap 234, which is recessed from the side surface of the valve seat 200 away from the valve plate 300, and the fifth installation gap 234 can extend to the inner wall of the valve seat 200 facing the flow passage 130. In this case, the elastic member 550 can be installed in the fifth installation gap 234, so that the elastic member 550 can be elastically pressed between the valve seat 200 and the valve body 100 in the distribution direction of the installation cavity 120.

[0066] As described above, the fifth installation gap 234 is located on the side surface of the valve seat 200 away from the valve plate 300, and under the elastic pressing action of the elastic member 550, the valve seat 200 can move towards the valve plate 300 to form a pressing fit relationship with the valve plate 300, thereby minimizing the size of the assembly gap between the valve seat 200 and the valve plate 300, so that the valve plate 300 and the valve seat 200 can form an initial sealing effect, preventing the fluid in the flow passage 130 from entering the inner cavity 110 of the valve body 100 through the gap between the valve plate 300 and the valve plate 200.

[0067] In order to improve the uniformity of the elastic pressing action of the elastic member 550 on the valve seat 200, in the embodiment of the present application, the fifth installation gap 234 can also have a closed ring structure, and because the installation space of the elastic member 550 is relatively small, in order to improve the uniformity of the elastic action of the elastic member 550, the elastic member 550 can be a wave spring, which is embedded in the fifth installation gap 234 and elastically pressed between the valve seat 200 and the valve body 100. Of course, in order to ensure that the opening and closing of the valve plate 300 is relatively smooth, in the embodiment of the present application, the side of each scraping ring 510 close to the valve plate 300 can be provided with a chamfer, thereby avoiding the valve plate 300 to a certain extent, so as to facilitate the movement of the valve plate 300 from the outside of the scraping ring 510 to between the two scraping rings 510.

[0068] It should be noted that, in the present document, the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can also include other elements not expressly listed or inherent to such process, method, article, or apparatus. An element proceeded by "comprises... a" does not, without more constraints, exclude the presence of additional identical elements in the process, method, article, or apparatus that comprises the element. Furthermore, it is to be understood that the method and apparatus of the present application can be carried out by someone other than the person named in the independent claims, and that the scope of the independent claims is not limited to the person named in the independent claims. In addition, it should be noted that the scope of the method and apparatus of the present application is not limited to performing the functions in the order discussed or illustrated, but can include performing the functions in a substantially simultaneous manner or in the reverse order, for example, the described method can be performed in an order different from that described, and various steps can be added, omitted, or combined, in addition, features described with reference to certain examples can be combined in other examples.

[0069] The embodiments of the present application described above are merely illustrative, and are not intended to limit the present application, and the specific embodiments described above are merely illustrative, and are not intended to limit the present application, and the person of ordinary skill in the art can make many forms under the inspiration of the present application without departing from the purpose of the present application and the scope protected by the claims, and all forms belong to the protection of the present application.

Claims

1. A valve, characterized in that The valve body, the valve seat, the valve plate, the sealing ring and the scraping ring are included, wherein, The valve body has a valve cavity, a mounting cavity and a flow channel, opposite sides of the valve cavity are provided with the mounting cavities, and each side of the mounting cavities away from the valve cavity is provided with the flow channel, the flow channel communicates with the valve cavity through the mounting cavity; Each of the mounting cavities is provided with the valve seat, and the valve plate is movably mounted in the valve cavity, the outer side of each valve seat is provided with a sealing ring, and the valve seat is sealingly matched with the valve body through the sealing ring; Each of the valve seats is provided with a receiving notch, and the receiving notch is recessed from the outer circumferential surface of the valve seat, each of the receiving notches is provided with the scraping ring, and the side surface of each of the scraping rings facing the valve plate is used to scrape the corresponding side surface of the valve plate.

2. The valve of claim 1, wherein Each of the receiving notches is a closed annular structure, and the scraping ring is a closed annular structure.

3. The valve of claim 2, wherein The valve seat is further provided with a limiting groove, and the limiting groove is formed at the bottom of the receiving notch; Further comprising a limiting piece, the limiting piece is fixedly connected to the inner wall of the scraping ring, the limiting piece is accommodated in the limiting groove, and the limiting piece is limitedly matched with the limiting groove in the distribution direction of the mounting cavity; The limiting piece and the limiting groove are both closed annular structures.

4. The valve of claim 2, wherein The valve seat is further provided with a first mounting notch, the first mounting notch is a closed annular structure, the first mounting notch is communicated on the side of the receiving notch away from the valve plate, and the bottom surface of the first mounting notch is flush or protruded from the bottom surface of the receiving notch in the radial direction of the valve seat, and the first mounting notch is provided with the sealing ring.

5. The valve of claim 4, wherein The valve seat is further provided with a second mounting notch, the second mounting notch is recessed from the outer wall of the valve seat, and the second mounting notch extends to the side surface of the valve seat away from the valve plate, the second mounting notch is a closed annular structure, and the second mounting notch is provided with the sealing ring.

6. The valve of claim 5, wherein The second mounting notch is further provided with a check ring, and the check ring is located on the side of the sealing ring away from the valve plate.

7. The valve of claim 1, wherein The valve seat is provided with a third mounting notch, the third mounting notch is recessed from the inner wall of the valve seat facing the flow channel, the valve body is provided with a fourth mounting notch, the fourth mounting notch is recessed from the side wall of the flow channel in the valve body, and the third mounting notch and the fourth mounting notch are both closed annular structures; Further comprising a dustproof ring, a part of the dustproof ring is accommodated in the third mounting notch, and another part of the dustproof ring is accommodated in the fourth mounting notch, and the outer wall of the dustproof ring is arranged in close contact with the valve seat and the valve body.

8. The valve of claim 7, wherein The dustproof ring is provided with a plurality of air holes, each of the air holes is arranged through the dustproof ring along the radial direction of the dustproof ring, and the projection of each of the air holes in the plane perpendicular to the axial direction of the air hole is located on the valve body or the valve seat.

9. The valve of claim 1, wherein Further comprising a guide plate, each of the valve seats is provided with the guide plate, and the guide plate is arranged on the outer side of the scraping ring, the guide plate is arranged in close contact with the corresponding scraping ring, and the side surface of the guide plate facing the valve plate is used to scrape the corresponding side surface of the valve plate.

10. The valve of claim 1, wherein The valve seat is provided with a fifth installation notch recessed from a side surface of the valve seat facing away from the valve plate, and an elastic member is installed in the fifth installation notch, and the elastic member is elastically pressed between the valve seat and the valve body in the distribution direction of the installation cavity.

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