Sheet-type fully-wrapped ball valve

Abstract

The utility model discloses a plate type full-wrapping ball valve which comprises a valve body, a left valve cover is arranged on the left side of the valve body, a right valve cover is arranged on the right side of the valve body, a valve cavity is formed in the valve body, a valve element is arranged at the position of the valve cavity, valve seats are arranged on the left side and the right side of the valve element respectively, sealing rings are arranged on the two valve seats, and a set of compression springs are arranged on the left valve cover and the right valve cover. Annular grooves are formed in the upper portion and the lower portion of the valve element respectively, annular supporting plates are arranged on the two annular grooves respectively, annular connecting bases are arranged on the two annular supporting plates respectively, first annular grooves are formed in the top faces of the two annular grooves respectively, second annular grooves are formed in the top faces of the two annular supporting plates respectively, and a set of balls are installed between the first annular grooves and the second annular grooves. A cylindrical block is fixed to the bottom end of the valve element, a round hole is formed in the bottom end of the valve cavity, a valve rod is arranged on the valve body, a pulling rod is installed at the top end of the valve rod, a round concave hole is formed in the valve cavity, and an insertion block is arranged on the valve rod. The utility model can greatly reduce the abrasion of the sealing ring at the outlet end, is convenient to install and easy to maintain, and is worthy of popularization and application.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, and specifically, to a wafer full-encapsulation ball valve. Background Art

[0002] Wafer ball valves and gate valves belong to the same type of valves. The difference is that its closing member is a sphere, and the sphere rotates around the center line of the valve body to achieve opening and closing. Ball valves are mainly used in pipelines to cut off, distribute, and change the flow direction of the medium.

[0003] Most of the existing wafer ball valves are three-piece ball valves, that is, they are composed of a left valve cover, a valve body, and a right valve cover, and the valve core is horizontally installed in the middle valve body, so it is called a three-piece ball valve. However, for the current three-piece ball valves, in a high-pressure medium environment, it is very difficult to open or close the ball valve, because the high-pressure medium impacts the valve core horizontally, resulting in the valve core being strongly pressed against the sealing ring at the outlet end, causing extremely large frictional resistance when the valve core rotates. Not only is it difficult to open and close the ball valve, but also the sealing ring at the outlet end wears out too quickly, requiring frequent pipeline shutdowns for replacing the sealing ring, resulting in troublesome use and high maintenance costs.

[0004] The Chinese utility model patent CN 217815094 U discloses a fixed ball valve with a valve stem anti-blowout function. The fixed ball valve includes a valve body, a valve core located inside the valve body, an upper valve stem located above the valve core, and a lower valve stem located below the valve core. Both the upper valve stem and the lower valve stem are provided with a boss. The valve core is provided with two countersunk holes arranged coaxially. The large-diameter ends of the two countersunk holes communicate with the inner cavity of the valve core. The bosses on both the upper valve stem and the lower valve stem are located at the ends. The upper valve stem and the lower valve stem respectively pass through the two countersunk holes, and the two bosses respectively abut against the stepped surfaces of the two countersunk holes. When the fixed ball valve is in a high-pressure medium working condition, the friction force of the valve core on the sealing ring is large, resulting in the need to frequently replace the sealing ring and extremely high maintenance costs. Summary of the Utility Model

[0005] The utility model aims to solve the above-mentioned disadvantages of the prior art, and provides a wafer full-encapsulation ball valve that is easy to install and resistant to high pressure, meeting the requirements of high pressure resistance and low maintenance costs.

[0006] The utility model adopts a technical solution to solve the technical problem: the sheet-type all-inclusive ball valve comprises a valve body, a left valve cover is arranged on the left side of the valve body, a right valve cover is arranged on the right side of the valve body, the left valve cover and the right valve cover are fixed to the valve body by fasteners, a valve cavity is arranged in the valve body, a valve core is arranged at the valve cavity, valve seats plugged into the valve body are arranged on the left and right sides of the valve core respectively, sealing rings are installed on the two valve seats, a group of compression springs which are evenly arranged along the center of the valve seat and press the two sealing rings to press against the spherical surface of the valve core are installed on the left valve cover and the right valve cover; annular grooves are opened on the upper and lower parts of the valve core, and the two annular grooves are arranged on the upper and lower parts of the valve core. The grooves are each provided with an annular support plate, and both annular support plates are provided with an annular connecting seat fixed on the valve body. The top surfaces of the two annular grooves are each provided with a first annular groove, and the top surfaces of the two annular support plates are each provided with a second annular groove, and a group of balls are installed between the first annular groove and the second annular groove, a cylindrical block is fixed to the bottom end of the valve core, and a circular hole opened on the valve body and plugged into the cylindrical block is provided at the bottom end of the valve cavity, a valve stem is rotatably connected to the valve body to drive the valve core to rotate, a beating rod is installed on the top end of the valve stem, a circular concave hole opened on the valve body is provided on the top end of the valve cavity, and an insert block plugged into the circular concave hole is fixed on the valve stem. Here, the valve body, left valve cover and right valve cover are assembled, which is convenient for the installation of the valve core and has a lower manufacturing cost; the function of the valve seat, sealing ring and compression spring is to compensate the position of the sealing ring after it is worn, thereby increasing the service life of the sealing ring and reducing the maintenance frequency and maintenance cost; the function of the annular groove, annular support plate, annular connecting seat, first annular groove, second annular groove and ball is to support the valve core longitudinally to avoid excessive weight of the valve core pressing on the lower half of the sealing ring, which may cause the lower half of the sealing ring to rotate too much after the valve core rotates too much. Excessive wear and tear will cause premature scrapping and increase maintenance costs, and each ball can reduce the friction generated by the rotation of the valve core, making the valve core easier to rotate; the role of the cylindrical block, round hole, round concave hole, and plug block here is to give the valve core resistance to lateral loads, so that it can withstand high pressure and avoid the high medium pressure on the sealing ring at the outlet end causing the sealing ring at the outlet end to wear too quickly, which can not only avoid the difficulty of rotating the valve core, but also make the sealing ring at the outlet end have a longer life; the role of the valve stem and the bend rod here is to facilitate the bend operation of the valve core.

[0007] Further improvement is made as follows: a first self-lubricating layer is provided on the outer contour of the cylindrical block, a second self-lubricating layer is provided on the outer contour of the insertion block, and a third self-lubricating layer is provided on the outer contours of the two valve seats. The function of the first self-lubricating layer is to enable the cylindrical block to rotate with less frictional resistance, making the valve core rotate more smoothly and labor-savingly. The first self-lubricating layer is made of tin bronze material. The function of the second self-lubricating layer is to enable the insertion block to rotate with less frictional resistance, making the insertion block rotate more smoothly and labor-savingly. The second self-lubricating layer is made of tin bronze material. The function of the third self-lubricating layer is to enable the valve seat to move more smoothly and avoid jamming. The third self-lubricating layer is made of tin bronze material.

[0008] Further improvement is made as follows: dovetail grooves are formed on both the left valve cover and the right valve cover, dovetail blocks that are in plug-in fit with the dovetail grooves are fixed on both valve seats, and O-ring seals that cooperate with the dovetail blocks are installed on the left valve cover and the right valve cover. The functions of the dovetail groove, the dovetail block, and the O-ring seal are to prevent each compression spring from contacting the medium, thereby avoiding the problem that the compression spring ages and fails too quickly.

[0009] Further improvement is made as follows: a fourth self-lubricating layer is provided on the outer contours of the two dovetail blocks. The function of the fourth self-lubricating layer is to enable the dovetail blocks to move more smoothly and avoid jamming. The fourth self-lubricating layer is made of tin bronze material.

[0010] Further improvement is made as follows: an arc-shaped limiting rod is fixed on the lever, and an arc-shaped groove that cooperates with the arc-shaped limiting rod and is used for fully opening and fully closing the valve core is formed on the valve body. The functions of the arc-shaped limiting rod and the arc-shaped groove are to limit whether the valve core is in the fully open position or the fully closed position and avoid the situation that the valve core rotates too much or too little.

[0011] Further improvement is made as follows: a rubber sleeve is sleeved on the lever. The function of the rubber sleeve is to increase the frictional force, thereby facilitating the operation of the lever and avoiding slipping when driving the lever.

[0012] The beneficial effects of the present utility model are as follows:

[0013] 1). Through the circular ring groove, the circular ring support plate, the circular ring connecting seat, the first circular groove, the second circular groove, and the ball bearings, longitudinal support can be provided for the valve core, preventing excessive weight of the valve core from pressing on the lower half of the sealing ring, which may cause excessive wear of the lower half of the sealing ring and premature scrapping when the valve core rotates too much, increasing the maintenance cost. Moreover, each ball bearing can reduce the frictional force generated during the rotation of the valve core, making the rotation of the valve core easier.

[0014] 2). Through the arrangement of the valve seat and the compression spring, the position can be compensated after the sealing ring is worn, thereby improving the service life of the sealing ring and reducing the maintenance cost.

[0015] 3). The cylindrical block, round hole, round concave hole, and insertion block can provide the valve core with resistance to lateral loads, thereby enabling it to resist high medium pressures, preventing the high medium pressure from pressing on the sealing ring at the outlet end and causing the sealing ring at the outlet end to wear too quickly. This not only avoids difficulties in rotating the valve core but also extends the service life of the sealing ring at the outlet end. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a top view of the present utility model;

[0017] Figure 2 is a structural schematic diagram of the present utility model;

[0018] Figure 3 is Figure 1 a partial enlarged view of area A of

[0019] Figure 4 is a structural schematic diagram of the insertion block area in the present utility model;

[0020] Figure 5 is Figure 1 a partial enlarged view of area B of

[0021] Figure 6 is a structural schematic diagram of the cylindrical block area in the present utility model;

[0022] Figure 7 is a cross-sectional view of the arc limiting rod area in the present utility model.

[0023] Description of the reference numerals: valve body 1, valve cavity 1-1, round hole 1-2, round concave hole 1-3, arc groove 1-4, left valve cover 2, right valve cover 3, valve core 4, circular ring groove 4-1, cylindrical block 4-2, first self-lubricating layer 4-2a, valve seat 5, third self-lubricating layer 5-1, sealing ring 6, compression spring 7, second circular groove 8-1, circular ring connecting seat 9, ball 10, valve rod 11, insertion block 11-1, second self-lubricating layer 11-1a, lever 12, arc limiting rod 12-1, rubber sleeve 12-2, dovetail groove 13, dovetail block 14, fourth self-lubricating layer 14-1, O-ring 15. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0025] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0026] Referring to the attached drawings: This wafer-type full-ball valve includes a valve body 1. A left valve cover 2 is provided on the left side of the valve body 1, and a right valve cover 3 is provided on the right side of the valve body 1. The left valve cover 2 and the right valve cover 3 are fixed to the valve body 1 through fasteners. A valve cavity 1-1 is provided inside the valve body 1. A valve core 4 is provided at the valve cavity 1-1. Valve seats 5 inserted into the valve body 1 are respectively provided on the left and right sides of the valve core 4. Sealing rings 6 are installed on both valve seats 5. A set of compression springs 7 evenly distributed along the center of the valve seat 5 are installed on the left valve cover 2 and the right valve cover 3 and press the two sealing rings 6 against the spherical surface of the valve core 4; Circular grooves 4-1 are respectively opened at the upper and lower parts of the valve core 4. Circular support plates 8 are respectively provided on the two circular grooves 4-1. Circular connection seats 9 fixed to the valve body 1 are respectively provided on the two circular support plates 8. First circular grooves 4-1a are respectively opened at the top surfaces of the two circular grooves 4-1. Second circular grooves 8-1 are respectively opened at the top surfaces of the two circular support plates 8. A set of balls 10 are installed between the first circular groove 4-1a and the second circular groove 8-1. A cylindrical block 4-2 is fixed at the bottom end of the valve core 4. A circular hole 1-2 opened on the valve body 1 and in plug-in fit with the cylindrical block 4-2 is provided at the bottom end of the valve cavity 1-1. A valve rod 11 for driving the valve core 4 to rotate is rotatably connected to the valve body 1. A lever 12 is installed at the top end of the valve rod 11. A circular concave hole 1-3 opened on the valve body 1 is provided at the top end of the valve cavity 1-1. A plug 11-1 fixed on the valve rod 11 and in plug-in fit with the circular concave hole 1-3 is provided.

[0027] A first self-lubricating layer 4-2a is provided on the outer contour of the cylindrical block 4-2. A second self-lubricating layer 11-1a is provided on the outer contour of the plug 11-1. A third self-lubricating layer 5-1 is provided on the outer contours of the two valve seats 5.

[0028] Dovetail grooves 13 are respectively opened on the left valve cover 2 and the right valve cover 3. Dovetail blocks 14 inserted into the dovetail grooves 13 are respectively fixed on the two valve seats 5. O-ring seals 15 cooperating with the dovetail blocks 14 are installed on the left valve cover 2 and the right valve cover 3.

[0029] A fourth self-lubricating layer 14-1 is provided on the outer contours of the two dovetail blocks 14.

[0030] The arc limiting rod 12-1 is fixed on the lever 12, and an arc groove 1-4 which is matched with the arc limiting rod 12-1 and is used for the full-open limit and full-close limit of the valve core 4 is formed on the valve body 1.

[0031] A rubber sleeve 12-2 is sleeved on the lever 12.

[0032] The working principle of the utility model: When it is necessary to close the wafer full-encapsulation ball valve, only need to use the lever 12 to turn the valve stem 11. The valve stem 11 drives the valve core 4 to rotate. Since the valve core 4 is longitudinally supported by the upper and lower circular support plates 8 during rotation and the low-friction operation of each ball 10, the valve core 4 rotates with small frictional resistance and the lever 12 is easy to turn. During the closing process of the valve core 4, the pressure area of the high-pressure medium on the spherical surface of the valve core 4 gradually increases, so the transverse impact force on the valve core 4 also gradually increases. At this time, through the cooperation of the cylindrical block 4-2 at the circular hole 1-2 and the plug 11-1 at the circular concave hole 1-3, the valve core 4 can be subjected to the action of resisting the transverse impact load, and the valve core 4 will not be impacted by the high-pressure medium and extruded towards the seal ring 6 at the outlet end. Therefore, during the process of the valve core 4 closing the ball valve, the position of the valve core 4 remains unchanged all the time, and the seal ring 6 at the outlet end will not be extruded and worn faster. When the arc limiting rod 12-1 on the lever 12 touches the end of the arc groove 1-4, it indicates that the ball valve is in the full-closed position (as Figure 7 shown). Therefore, the utility model can not only work under high-pressure media, but also has a longer service life of the seal ring 6 and lower maintenance cost, greatly reducing the use cost and maintenance cost of customers and being worthy of popularization and application.

[0033] Although the present utility model has been illustrated and described by referring to the preferred embodiments, those of ordinary skill in the art should understand that various changes in form and details may be made within the scope of the claims.

Claims

1. A wafer - type full - port ball valve, comprising a valve body (1), characterized in that: On the left side of the valve body (1), there is a left valve cover (2). On the right side of the valve body (1), there is a right valve cover (3). The left valve cover (2) and the right valve cover (3) are fixed to the valve body (1) through fasteners. Inside the valve body (1), there is a valve cavity (1-1). At the valve cavity (1-1), there is a valve core (4). On the left and right sides of the valve core (4), there are valve seats (5) inserted into the valve body (1). On both of the valve seats (5), there are sealing rings (6) installed. On the left valve cover (2) and the right valve cover (3), there is a set of compression springs (7) evenly distributed along the center of the valve seat (5) and pressing the two sealing rings (6) tightly against the spherical surface of the valve core (4); On the upper and lower parts of the valve core (4), there are circular grooves (4-1). On both of the circular grooves (4-1), there are circular support plates (8). On both of the circular support plates (8), there are circular connection seats (9) fixed to the valve body (1). On the top surfaces of both of the circular grooves (4-1), there are first circular grooves (4-1a). On the top surfaces of both of the circular support plates (8), there are second circular grooves (8-1). Between the first circular groove (4-1a) and the second circular groove (8-1), there is a set of balls (10) installed; At the bottom end of the valve core (4), there is a cylindrical block (4-2). At the bottom end of the valve cavity (1-1), there is a circular hole (1-2) opened on the valve body (1) and inserted and matched with the cylindrical block (4-2). On the valve body (1), there is a valve rod (11) rotatably connected to drive the valve core (4) to rotate. At the top end of the valve rod (11), there is a lever (12) installed. At the top end of the valve cavity (1-1), there is a circular concave hole (1-3) opened on the valve body (1). On the valve rod (11), there is a plug (11-1) fixed and inserted and matched with the circular concave hole (1-3).

2. The wafer type full-encapsulated ball valve according to claim 1, characterized in that: On the outer contour of the cylindrical block (4-2), there is a first self-lubricating layer (4-2a). On the outer contour of the plug (11-1), there is a second self-lubricating layer (11-1a). On the outer contours of both of the valve seats (5), there is a third self-lubricating layer (5-1).

3. The wafer fully encapsulated ball valve according to claim 1, characterized in that: On the left valve cover (2) and the right valve cover (3), there are dovetail grooves (13). On both of the valve seats (5), there are dovetail blocks (14) fixed and inserted and matched with the dovetail grooves (13). On the left valve cover (2) and the right valve cover (3), there is an O-ring (15) installed and matched with the dovetail blocks (14).

4. The wafer - type fully - enclosed ball valve according to claim 3, characterized in that: On the outer contours of both of the dovetail blocks (14), there is a fourth self-lubricating layer (14-1).

5. The wafer - type full - envelop ball valve according to claim 1, wherein: On the lever (12), there is an arc limiting rod (12-1) fixed. On the valve body (1), there is an arc groove (1-4) opened and matched with the arc limiting rod (12-1) and used for full-open limit and full-close limit of the valve core (4); 6. A wafer - type full - envelop ball valve according to claim 1, wherein: On the lever (12), there is a rubber sleeve (12-2) sleeved.

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