Assembled ball valve with easy-to-replace valve core

Abstract

This utility model relates to the technical field of valves, specifically to an assembled ball valve that facilitates valve core replacement. The key technical features include an integrated valve body, valve cover, and valve core. The valve body has at least two water inlets, an opening for direct vertical insertion and removal of the valve core, and an inner cavity. A fixing hole is provided at the top edge of the opening. The valve core is assembled in the inner cavity. The valve cover is fixed to the valve body, closing the opening and rotatably connected to the valve core. The valve stem at the top of the valve core extends out of the valve cover. This utility model, by modifying the integrated valve body and valve core, allows for direct vertical insertion and removal of the valve core, facilitating disassembly and subsequent maintenance. Furthermore, it allows for direct inspection or replacement of the valve core without disassembling the valve body while it is installed in the pipeline, thus improving the convenience of operation and use.

Description

Technical Field

[0001] This utility model relates to the technical field of valves, specifically to an assembled ball valve that facilitates valve core replacement. Background Technology

[0002] Applications of assembled plastic ball valves: agricultural irrigation systems, water supply and drainage systems, and chemical conveying systems. Traditional one-piece injection molded plastic ball valves, especially when used in agricultural irrigation systems, are prone to jamming and malfunction due to water impurities. This can lead to motor damage, interrupted irrigation, and losses for farmers.

[0003] In the prior art, we found that Chinese Patent Application No. CN200710101542.8 discloses a ball valve, particularly a plastic ball valve. This ball valve includes a valve body with an internal flow channel, a ball seat, and an integrated valve core in which the valve stem and ball are pre-connected. The ball of the integrated valve core is located within the valve body, the valve stem of the integrated valve core extends out of the valve body, and the ball seat is adapted to the ball of the integrated valve core. The valve body is characterized by being made of plastic and having one or two plastic valve covers with through holes. The plastic valve covers are bonded to the plastic valve body, and the through holes of the plastic valve covers communicate with the flow channel within the plastic valve body.

[0004] The application analysis of the above product revealed that it cannot solve the technical problems in agricultural applications. Not only is it inconvenient to assemble and disassemble, but it is also easily blocked by mud and sand.

[0005] See also application number: CN200310116736.7, whose valve body structure is integrated, and the valve core is easily worn by mud and sand, making it difficult for the motor to drive, resulting in huge costs in later maintenance and upkeep. Most of them are replaced directly as a whole, and the service life is not long.

[0006] In agricultural applications, the silt in the water is difficult to change; the only thing that can be changed is the ball valve's adaptability to this water quality. How to increase the service life, reduce maintenance costs, and facilitate operation are problems that need to be further solved. Utility Model Content

[0007] To address the technical problems and shortcomings of existing technologies, this invention provides an assembly-type ball valve with a replaceable valve core. The advantages of this ball valve are that the large space reserved in the valve body can resolve water impurities and sediment problems, greatly increasing its service life. It can be easily maintained and repaired, and the replacement of the rubber ring can be reused at a very low cost.

[0008] To achieve the above and other related objectives, the present invention adopts the following technical solution:

[0009] An assembly ball valve with a replaceable valve core includes an integral valve body, valve cover, and valve core. The valve body has at least two water inlets, an opening for the valve core to be placed and removed vertically, and an inner cavity. A fixing hole is provided at the top edge of the opening. The valve core is assembled in the inner cavity. The valve cover is fixed to the valve body to close the opening and is rotatably connected to the valve core. The valve stem at the top of the valve core extends out of the valve cover.

[0010] Preferably, the valve body is provided with three interfaces, which are distributed at the three end positions of the "T" shape, and the interfaces are provided with internal threads.

[0011] Preferably, the inner cavity has two vertical annular grooves and one horizontal annular groove, with rubber rings embedded in the vertical annular grooves and limit rings embedded in the horizontal annular grooves.

[0012] Preferably, the valve core has a ball core, a valve stem, and a bushing. The bottom of the ball core has a flush plane. The ball core is fitted with a side water inlet at the position of the vertical annular groove. The top of the ball core and the valve stem are fixedly connected by the bushing, which is rotatably connected to the valve cover.

[0013] Preferably, a channel is provided on the ball core, and a bottom water inlet is also provided at the bottom of the valve core, the channel connecting the side water inlet and the bottom water inlet.

[0014] Preferably, a ring is provided on the bottom water inlet, the ring is fitted inside the bottom water inlet, and the lower end of the ring extends into the inside of the limiting ring.

[0015] Preferably, the top of the ball core is provided with a first sealing ring, a second sealing ring and an O-ring. The first sealing ring fits in the gap between the ball core and the bushing, the second sealing ring fits in the gap between the valve cover and the ball core, and a gap is formed between the first sealing ring and the second sealing ring for the O-ring to assemble. The O-ring is clamped between the first sealing ring and the second sealing ring.

[0016] Preferably, the top of the valve cover is provided with multiple fixing posts.

[0017] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0018] 1. This utility model, through the structural design of the valve body cavity, combined with the valve cover and ball core, enables a straight up-and-down operation for removing and placing the valve core, facilitating maintenance and repair. Maintenance and repair can be performed by simply removing the screws on the valve cover, allowing for on-site repairs without dismantling the water pipes, which is both convenient and time-saving.

[0019] 2. In this utility model, the inner cavity of the valve body and the ball core have a large space to store dirt, which avoids clogging and is not easy to get stuck.

[0020] 3. The valve body and ball core are injection molded with embedded stainless steel limit rings and sleeves through mold optimization. The limit rings and sleeves, as stainless steel connecting parts, avoid the defects of plastic deformation and avoid natural wear caused by friction between plastics. The stainless steel is positioned at the axis, which can make the ball valve more concentric and precise, and the motor runs smoothly to achieve a lower torque level, thus extending the service life.

[0021] 4. Compared with the traditional integrated ball valve, this utility model has a larger ball core contact surface, greater valve core rotation torque, and higher motor power. This solution is smoother to operate, has less resistance, and requires less effort to drive the valve core. This solution greatly reduces the power consumption of the motor, extends the service life of the motor, and reduces the battery life and cost.

[0022] Other additional advantages and benefits of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0023] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0024] Figure 1 This is a three-dimensional overall structural diagram of an embodiment of this application;

[0025] Figure 2 This is a cross-sectional structural diagram of an embodiment of this application;

[0026] Figure 3 This is a schematic diagram of the straight-up and straight-down picking and placing method according to an embodiment of this application.

[0027] Explanation of reference numerals for major components:

[0028] 1. Valve body; 11. Interface; 111. Internal thread; 12. Opening; 13. Inner cavity; 14. Fixing hole; 15. Vertical annular groove; 16. Horizontal annular groove; 17. Limiting ring;

[0029] 2. Valve cover; 21. Fixing post;

[0030] 3. Valve core; 31. Ball core; 311. Ring sleeve; 312. Flat surface; 313. Side water inlet; 314. Bottom water inlet; 315. Channel; 32. Valve stem; 33. Shaft sleeve; 4. Rubber ring; 5. First sealing ring; 6. Second sealing ring; 7. O-ring. Detailed Implementation

[0031] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings. The following specific examples illustrate the implementation of this utility model, and those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model. It should be noted that, unless otherwise specified, the following embodiments and features in the embodiments can be combined with each other.

[0032] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of this utility model. The illustrations only show the components related to this utility model and are not drawn according to the number, shape and size of the components in actual implementation. In actual implementation, the form, quantity and proportion of each component can be changed at will, and the layout of the components may also be more complex.

[0033] It should be noted that in the description of this application, the terms "upper," "lower," "left," "right," "inner," and "outer," etc., indicating directional or positional relationships, are based on the directional or positional relationships shown in the accompanying drawings. These are merely for ease of description and do not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, it should be noted that in the description of this application, unless otherwise explicitly specified and limited, the terms "installed," "connected," "linked," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two elements. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0034] Example 1:

[0035] This utility model discloses an assembly ball valve with a replaceable valve core 3, see reference. Figure 1 , Figure 2 and Figure 3The valve body comprises an integrated valve body 1, valve cover 2, and valve core 3. The valve body 1 has at least two water inlets 11, an opening 12 for the valve core 3 to be inserted and removed vertically, and an inner cavity 13. A fixing hole 14 is provided at the top edge of the opening 12. The valve core 3 is assembled in the inner cavity 13. The valve cover 2 is fixed to the valve body 1, closing the opening 12 and rotatably connected to the valve core 3. The valve stem 32 at the top of the valve core 3 extends out of the valve cover 2. In this specific embodiment, it is more preferably that the valve body 1 has three inlets 11, distributed at the three ends of a "T" shape, and each inlet 11 has an internal thread 111. In this case, the inlets 11 can be used to connect water pipes, facilitating water supply control in agricultural pipelines.

[0036] Depend on Figure 2 and Figure 3 As shown in the diagram, the valve cover 2 and the ball core 31, combined with the valve cover 2, allow for a straight up-and-down operation of the valve core 3, facilitating maintenance and repair. Maintenance and repair can be performed by removing the screws from the valve cover 2, enabling on-site repairs without dismantling the water pipes, which is both convenient and time-saving.

[0037] Furthermore, the inner cavity 13 has two vertical annular grooves 15 and one horizontal annular groove 16. A rubber ring 4 is embedded in the vertical annular groove 15, and a limiting ring 17 is embedded in the horizontal annular groove 16. The vertical annular grooves 15 facilitate the positioning of the rubber ring 4, and the horizontal annular groove 16 facilitates the positioning of the limiting ring 17. This improves concentricity. Therefore, it can be seen that the space here is relatively large.

[0038] To facilitate convenient operation and efficient assembly of the valve core 3, the valve core 3 comprises a ball core 31, a valve stem 32, and a bushing 33. The bottom of the ball core 31 has a flush plane 312. A side water inlet 313 is positioned at the vertical annular groove 15 of the ball core 31. The top of the ball core 31 and the valve stem 32 are fixedly connected via the bushing 33, which is rotatably connected to the valve cover 2. Therefore, the ball core 31 can rotate around the axis of the valve stem 32, allowing for opening and closing operations similar to a regular ball valve. Specifically, when the ball core 31 rotates 90 degrees, the horizontal channel 315 on the ball core 31 and the horizontal channel 315 of the valve body 1 are perpendicularly intersected. At this point, the ball core 31 blocks the side inlet 11, closing the two side inlets 11 and preventing communication, thus shutting off the water supply path. When the ball core 31 rotates another 90 degrees, the water supply path is restored, just as... Figure 2 The state shown is the normal open state, with all three ports 11 interconnected. The port 11 in the upper direction can be arbitrarily selected as either an inlet or outlet.

[0039] Specifically, a channel 315 is provided on the ball core 31, and a bottom water inlet 314 is also provided at the bottom of the valve core 3. The channel 315 connects the side water inlet 313 and the bottom water inlet 314. This achieves the effect of preventing sediment from accumulating. The large internal space makes it easy for sediment to be carried away when used in different directions due to the different water flow directions.

[0040] In this design, a ring 311 is provided on the bottom inlet 314. The ring 311 is fitted inside the bottom inlet 314, and its lower end extends into the inner side of the limiting ring 17. The ring 311 and the limiting ring 17 are made of stainless steel and are injection molded onto the plastic valve body 1 or ball core 31. The valve body 1 and ball core 31 are injection molded by embedding the stainless steel limiting ring 17 and ring 311 through mold optimization. The limiting ring 17 and ring 311, as stainless steel connecting parts, avoid the defects of plastic deformation itself, and at the same time avoid natural wear caused by friction between plastics. The stainless steel is positioned at the axis, which can make the ball valve more concentric and precise, the motor runs smoothly and achieves a lower torque level, thus extending the service life.

[0041] In addition, to improve operational safety and the reliability of valve core 3 rotation, a first sealing ring 5, a second sealing ring 6, and an O-ring 7 are provided on the top of the ball core 31. The first sealing ring fits in the gap between the ball core 31 and the bushing 33, and the second sealing ring 6 fits in the gap between the valve cover 2 and the ball core 31. A gap is formed between the first sealing ring 5 and the second sealing ring 6 for the O-ring 7 to be assembled, and the O-ring 7 is sandwiched between the first sealing ring 5 and the second sealing ring 6. This structure greatly enhances the sealing effect, making leakage less likely. The valve core 3 rotates more flexibly, the contact area of ​​the ball core 31 is greatly reduced, frictional resistance is greatly reduced, and operation is smoother and less strenuous.

[0042] To facilitate the installation and fixation of the valve cover 2, multiple fixing posts 21 are provided on the top of the valve cover 2. This allows for easy fixation, and the valve cover 2 can also be used upside down with the valve cover 2 facing downwards, or suspended, or fixed to some brackets, etc., which facilitates irrigation and adjustment in agricultural systems.

[0043] In this embodiment, a new operating method is also provided. When replacing or cleaning the valve core 3, the steps are as follows: Step 1, remove the valve cover 2 and loosen the screws used to fix the valve cover 2 and the valve body 1; Step 2, lift the valve cover 2 vertically and remove the valve core 3 together with it; Step 3, clean the inner wall of the inner cavity 13 of the valve body 1, and inspect and clean or replace the valve core 3; Step 4, put the valve core 3 back into the valve body 1 from top to bottom, and fix the valve cover 2 back onto the valve body 1.

[0044] The technical solution of this utility model has been described above with reference to the preferred embodiments shown in the accompanying drawings. The above description is only a preferred embodiment of this utility model and is not intended to limit this utility model. For those skilled in the art, this utility model can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A replacement cartridge for a globe valve, comprising a one-piece valve body (1), a bonnet (2), and a valve trim (3), characterized in that, The valve body (1) has at least two water inlets (11), an opening (12) for the valve core (3) to be placed and removed vertically, and an inner cavity (13). A fixing hole (14) is provided at the top edge of the opening (12). The valve core (3) is assembled in the inner cavity (13). The valve cover (2) is fixed on the valve body (1) to close the opening (12) and is rotatably connected to the valve core (3). The valve stem (32) at the top of the valve core (3) extends out of the valve cover (2).

2. The cartridge valve assembly of claim 1, wherein, The valve body (1) is provided with three ports (11), which are distributed at the three end positions of the "T" shape, and the ports (11) are provided with internal threads (111).

3. The cartridge valve assembly of claim 2, wherein, The inner cavity (13) has two vertical annular grooves (15) and one horizontal annular groove (16). A rubber ring (4) is embedded in the vertical annular groove (15), and a limit ring (17) is embedded in the horizontal annular groove (16).

4. The cartridge valve assembly of claim 3, wherein, The valve core (3) has a ball core (31), a valve stem (32), and a bushing (33). The bottom of the ball core (31) has a flush plane (312). The ball core (31) is fitted with a side water inlet (313) at the position of the vertical annular groove (15). The top of the ball core (31) and the valve stem (32) are fixedly connected by the bushing (33). The bushing (33) is fitted on the valve cover (2) and rotated.

5. The cartridge valve assembly of claim 4, wherein, The ball core (31) is provided with a channel (315), and the bottom of the valve core (3) is also provided with a bottom water inlet (314). The channel (315) connects the side water inlet (313) and the bottom water inlet (314).

6. The cartridge valve assembly of claim 5, wherein, A ring (311) is provided on the bottom water inlet (314). The ring (311) is fitted inside the bottom water inlet (314), and the lower end of the ring (311) extends into the inner side of the limiting ring (17).

7. The cartridge valve assembly of claim 6, wherein, The top of the ball core (31) is provided with a first sealing ring (5), a second sealing ring (6) and an O-ring (7). The first sealing ring fits in the gap between the ball core (31) and the bushing (33), and the second sealing ring (6) fits in the gap between the valve cover (2) and the ball core (31). A gap is formed between the first sealing ring (5) and the second sealing ring (6) for the O-ring (7) to be assembled. The O-ring (7) is sandwiched between the first sealing ring (5) and the second sealing ring (6).

8. The cartridge valve assembly of claim 7, wherein, Multiple fixing posts (21) are provided on the top of the valve cover (2).

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