CN115370782A - A filter structure built-in ball valve - Google Patents

Abstract

The invention discloses a ball valve with a built-in filtering structure, which belongs to the field of valves, wherein a second channel is arranged on a valve body and a spherical opening and closing piece and on the opposite side of a valve rod, and the second channel is communicated with a first channel in the spherical opening and closing piece; a filter screen is arranged in the second channel, extends into the first channel in the center of the opening and closing piece and is used for intercepting impurities in the fluid passing through the first channel; this application utilizes spheroid form to open and close a piece inner space installation filter screen, compares in the whole volume of current external filtration and reduces greatly, and better realization valve body and filterable combination.

Description

A filter structure built-in ball valve

technical field

The invention belongs to the field of valves, in particular to a ball valve with a built-in filter structure.

Background technique

As shown in Figure 13, the existing ordinary ball valve includes a valve body, a spherical opening and closing part, and a valve stem. The filter function will add a filter device or filter structure outside the opening and closing parts, such as a filter ball valve disclosed in the Chinese invention patent with the notification number CN101943290A. There is a branch pipe in the middle of the valve body 1. A filter screen 2 is provided, and the filter screen 2 extends into the inside of the valve body 1, so that the upstream fluid must be filtered by the filter screen 2 before reaching the downstream. In similar technologies, the ball valve is not tightly combined with the filter device or filter structure. The overall structure of the two is relatively large, occupying two parts of the space in the pipeline system. The structure also requires special branch pipes for independent installation. This simple combination of ball valve and filter device or filter structure is not suitable for narrow spaces.

Contents of the invention

The purpose of the present invention is to provide a ball valve with a built-in filter structure, which solves the problem of large overall volume in the combination of the existing ball valve and filter device or filter structure.

The technical scheme adopted in the present invention is as follows: a built-in ball valve with filtering structure, including a valve body, the valve body is provided with a valve cavity, a medium inlet and a medium outlet connected to the valve cavity; a spherical opening and closing member is installed in the valve cavity, and the ball The opening and closing part is linked with the valve stem; the opening and closing part is provided with a first channel, and the first channel is used to communicate with the medium inlet and the medium outlet; the valve body and the spherical opening and closing part are opposite to the valve stem. A second channel is opened on the side, and the second channel penetrates the valve body wall downward to form a first opening, and the second channel communicates upward with the first channel of the spherical opening and closing member; a filter screen can be inserted from the first opening, The filter screen extends into the first channel in the center of the opening and closing member, and is used to intercept impurities in the fluid passing through the first channel; a blocking structure is provided at the first opening.

In an exemplary embodiment of the present disclosure, the second channel extends upwards, and a limiting groove is formed on the inner wall of the spherical opening and closing member, in which the top edge of the filter screen can be locked and positioned.

In an exemplary embodiment of the present disclosure, a plugging connection portion is further provided on the wall of the valve body and at the first opening, and the plugging connection portion is blocked by a blocking member. A specific structure is as follows: the plugging connection part is a section of externally threaded connecting pipe extending downwards, the blocking part is a cover body with internal threads, and the cover body is threadedly connected to the plugging connection part. The second channel is closed.

In an exemplary embodiment of the present disclosure, the filter screen includes a tubular filter body covered with filter holes; the upper side of the filter body is provided with a fluid inlet, and the lower part of the filter body forms an impurity storage chamber; the filter screen After the installation is completed, the fluid inlet on the side of the filter body faces the medium inlet of the valve body, and the impurity storage chamber is located under the first channel.

Further, the filter body is a mesh tube made of polymer fiber or mineral fiber, or a mesh tube made of stainless steel wire mesh. In addition, an annular first support ring is provided inside the upper edge of the filter body, and an annular second support ring is provided inside the lower edge of the filter body.

Further, the filter screen is clearance-fitted with the second channel, and the diameter of the filter screen is equal to or larger than that of the first channel.

In an exemplary embodiment of the present disclosure, the filter screen is pre-installed with the plugging connection part or the plugging part through a detachable connection structure. After the filter screen is installed, the fluid inlet of the filter screen and the medium inlet of the valve body Is on. A preferred embodiment is as follows, the bottom edge of the plugging connection part is provided with two opposite insertion holes, the bottom edge of the filter screen is provided with two opposite insertion holes, and the insertion holes at the bottom edge of the filter screen are connected to the plugging After aligning the insertion holes on the bottom edge of the upper part, use a pin to be stuck in the two insertion holes to temporarily fix the tubular filter on the valve body; The insertion part corresponding to the hole protrudes from the side wall of the filter screen and can be inserted into the two insertion holes of the blocking connection part.

The beneficial effect of the present invention is that: the present invention provides a ball valve with a built-in filter structure. In this application, a second channel is opened on the valve body and the spherical opening and closing member on the side opposite to the valve stem. The second channel is connected to the spherical opening and closing member. The first channel in the closure is connected; the filter is built into the second channel, and the filter extends into the first channel in the center of the opening and closing part to intercept impurities in the fluid passing through the first channel; this application uses a spherical opening and closing Compared with the existing external filter, the overall volume is greatly reduced, and the combination of the valve body and the filter is better realized.

Description of drawings

Fig. 1 is a diagram showing the appearance of the ball valve of Embodiment 1.

Fig. 2 is a diagram showing the internal structure after sectioning in Fig. 1 .

Fig. 3 is a structural display diagram of Fig. 2 after removing the filter screen.

Fig. 4 is a schematic diagram of the three-dimensional structure of the filter screen of Embodiment 1.

Fig. 5 is a schematic diagram of misalignment of the fluid inlet of the filter screen and the medium inlet of the valve body.

Fig. 6 is a schematic view of the structure of the tubular filter pre-installed on the plugging connection part.

Fig. 7 is a schematic diagram of the structure of the bottom edge of the tubular filter screen provided with a socket.

Fig. 8 is a structural schematic diagram of the pre-installation of the filter screen on the blocking member.

Fig. 9 is a schematic structural view of the filter body sleeved outside the impurity storage tank.

Fig. 10 is an exploded view of the structure of Fig. 9 .

Fig. 11 is an option 1 of the fluid inlet opened on the upper side of the filter body.

Fig. 12 is the second option of the fluid inlet opening on the upper side of the filter body.

Fig. 13 is a sectional view of a conventional ball valve.

In the figure: valve body 1, spherical opening and closing part 2, first channel 201, second channel 202, limit groove 203, valve stem 3, plugging connection part 4, blocking part 5, insertion hole 6, latch 7. Filter net 8 , filter body 801 , fluid inlet 802 , first support ring 803 , second support ring 804 , insertion part 805 , filter part 806 , impurity storage tank 9 .

Detailed ways

Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " Back", "Left", "Right", "Vertical", "Horizontal", "Top", "Bottom", "Inner", "Outer", "Clockwise", "Counterclockwise", "Axial" , "radial", "circumferential" and other indicated orientations or positional relationships are based on the orientations or positional relationships shown in the drawings, which are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying the referred device or Elements must have certain orientations, be constructed and operate in certain orientations, and therefore should not be construed as limitations on the invention.

In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, a feature defined as "first" and "second" may explicitly or implicitly include one or more of these features. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

In the description of the present invention, it should be noted that unless otherwise specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection. Connected, or integrally connected; it can be directly connected, or indirectly connected through an intermediary, and it can be the internal communication of two elements. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention in specific situations.

Example 1

As shown in Figure 1, it is the appearance display diagram of the ball valve of this embodiment, and Figure 2 is the internal structure display diagram after the section of Figure 1; the main structure of the ball valve in this application is the same as that of the existing ball valve, including valve body 1, ball Shaped opening and closing part 2, valve stem 3, valve body 1 is provided with a valve cavity and a medium inlet and a medium outlet connected with the valve cavity, in Figure 2, it is assumed that the left side is the medium inlet, and the right side is the medium outlet; the valve cavity A spherical opening and closing part 2 is installed inside, and the top of the spherical opening and closing part 2 is linked with the valve stem 3; a first channel 201 is opened on the opening and closing part, and the first channel 201 is used to communicate with the medium inlet and the medium outlet. In the embodiment, the cross section of the first channel 201 is circular.

The improvement made by the present application is: on the valve body 1 and the spherical opening and closing member 2, a second passage 202 is opened on the side opposite to the valve stem 3. In this embodiment, the cross section of the second passage 202 is circular; as shown in Figure 3 , the second channel 202 runs through the wall of the valve body downward to form a first opening, the second channel 202 communicates upward with the first channel 201 of the spherical opening and closing member 2, and continues to extend upwards, forming a limit on the inner wall of the spherical opening and closing member 2. The position groove 203 (that is, the limit groove 203 is formed on the side wall of the first channel 201); the second channel 202 is T-shaped with the first channel 201, and the diameter of the second channel 202 is equal to or larger than the diameter of the first channel 201 The diameter of a channel 201 is slightly larger; As shown in Figure 2, filter screen 8 can be inserted from the first opening, and filter screen 8 stretches in the first channel 201 in the center of the opening and closing member, for intercepting through the first channel 201 Impurities present in the fluid.

In addition, as shown in FIGS. 1 and 2 , a plugging connection portion 4 is provided on the wall of the valve body and at the first opening, and the plugging connection portion 4 is blocked by a plugging member 5 . In this embodiment, the plugging connection part 4 is a section of externally threaded connecting pipe extending downwards, and the blocking part 5 is a cover body with internal threads, and the cover body is threadedly connected to the plugging connection part 4, and the second channel 202 closed. Of course, other detachable connection methods can also be used for the plugging connection part 4 and the blocking part 5, such as the plugging connection part 4 is a section of internal thread connecting pipe extending downward, and the blocking part 5 is a cylindrical plug. Its outer wall is provided with external threads, and the plugging member 5 is screwed into the plugging connection part 4; for another example, the plugging part 5 is an elastic plug, and the plugging part 5 is plugged in the plugging connection part 4 for blocking.

There are various forms of the filter screen 8 in the present application, and several preferred embodiments are illustrated below.

As shown in Figure 4, the filter screen 8 is tubular as a whole, including a tubular filter body 801. The filter body 801 can be a mesh pipe section made of polymer fibers or mineral fibers with a mesh size range of 50-1000 microns; it can also be stainless steel A mesh pipe segment made of wire mesh; it can also be a stainless steel rectangular blank with a thickness of 0.1-0.5 mm that is punched to form many holes with a diameter ranging from 50-1000 microns, and then bent and welded into a round tube shape.

If a mesh pipe section made of polymer fiber or mineral fiber is used, or a mesh pipe section made of stainless steel wire mesh, an annular first support ring 803 is further added inside the upper edge of the filter body 801, and the first support ring 803 is bonded or Welded or welded on the inner side of the upper edge of the filter body 801, wherein the fiber material is bonded or welded, and the metal material is welded; the inner side of the lower edge of the filter body 801 is also provided with an annular second support ring 804; the first support ring 803 and the second support ring The function of the ring 804 is to support and fix the two ports of the mesh tube to prevent it from being easily deformed or damaged by force.

As shown in Figure 4, a fluid inlet 802 is provided on the upper side of the filter body 801, and an impurity storage chamber is formed at the bottom of the filter body 801; The limit groove 203 formed inside, the bottom of the filter screen 8 is supported by the blocking member 5; the fluid inlet 802 on the side of the filter body 801 faces the medium inlet of the valve body 1, and the impurity storage chamber is located below the first channel 201.

The size of the filter screen 8 is as follows: the diameter of the tubular filter screen 8 is equal to or slightly smaller than the diameter of the second passage 202, that is, the tubular filter screen 8 and the second passage 202 are clearance fits; and the tubular filter screen The diameter of 8 is equal to the diameter of first passage 201 or is slightly larger than the diameter of first passage 201; A kind of most preferred size is: the diameter of tubular filter 8 is equal to the diameter of second passage 202, and tubular filter 8 The diameter is slightly larger than the diameter of the first channel 201; the tubular filter 8 of this size can fit the inner walls of the first channel 201 and the second channel 202, forming a very small gap, preventing the fluid from being discharged backward without filtering In addition, the fluid inlet 802 provided on the side of the filter body 801 is as large as the first passage 201 or larger than the first passage 201, so as to prevent the edge of the fluid inlet 802 from forming a protruding barrier in the first passage 201, causing impurities to accumulate and cannot Smoothly enter the filter screen 8 inside.

As shown in Figure 2, when the ball valve is open, the first channel 201 leads to the medium inlet and the medium outlet, and the fluid entering the ball valve flows from the medium inlet into the first channel 201 of the spherical opening and closing member 2, and the filter in the center of the first channel 201 The net 8 intercepts the impurities in the fluid, and the impurities fall into the impurity storage chamber below.

Further, after the initial installation of the tubular filter screen 8, it needs to be replaced or cleaned regularly. When installing again, it is impossible to check whether the fluid inlet 802 is facing the medium inlet of the valve body 1 (shown as a facing state in FIG. In the situation shown in 5, that is, the fluid inlet 802 is misaligned with the medium inlet of the valve body 1. At this time, the impurities intercepted by the filter will accumulate at the medium inlet and cannot enter the impurity storage chamber inside the filter screen 8, and the ball valve will quickly It will be blocked, making it unusable. For this reason, the application makes following improvement design.

As shown in Figure 6, the bottom edge of the tubular filter screen 8 and the bottom edge of the plugging connection part 4 are provided with two opposite insertion holes 6, and the insertion hole 6 on the bottom edge of the tubular filter screen 8 is connected to the bottom edge of the plugging connection part 4. After aligning the insertion holes 6 on the edge, use a pin 7 to clamp in the two insertion holes 6, temporarily fix the tubular filter 8 on the valve body 1, and then install the blocking member 5, as shown in the figure after correct installation 2, the fluid inlet 802 is facing the medium inlet of the valve body 1 again; Temporarily fixed to avoid misalignment again when the blocking member 5 is installed. As shown in Figure 2, the two insertion holes 6 are located on the diameter of the bottom edge of the tubular filter screen 8 and the bottom edge of the plug connection part 4, perpendicular to the flow direction of the fluid in the valve body 1; of course the two insertion holes 6 It can also be the position rotated by 90° in FIG. 2 , or the position rotated by other arbitrary angles.

As shown in Figure 7, it is a deformation scheme of the structure of the above-mentioned latch 7. In the above-mentioned scheme, the latch 7 is an independent component and is easy to lose; The bottom edge of the filter screen 8 is provided with an insertion portion 805 corresponding to the two insertion holes 6 , and the insertion portion 805 protrudes from the side wall of the filter screen 8 and can be inserted into the two insertion holes 6 .

As shown in Figure 8, it is another pre-installation structure of the filter screen 8. In the above-mentioned scheme, the filter screen 8 is pre-installed on the plugging connection part 4. In this program, the filter screen 8 is pre-installed on the blocking member 5, such as As shown in the figure, the plugging connection part 4 is a section of externally threaded connecting pipe extending downwards, and the blocking part 5 is a cover body with internal threads, which is threadedly connected to the plugging connection part 4; the latch 7 is fixed on the In the center of the cover body, the bottom edge of the tubular filter 8 is provided with two insertion holes 6 corresponding to the pins 7. The tubular filter 8 is first temporarily installed on the blocking member 5, and then installed on the valve body 1 together. 5 The fixed number of rotations ensures that the fluid inlet 802 is directly opposite to the medium inlet of the valve body 1.

As shown in Figures 9 and 10, another structure of the filter screen 8 is formed. The filter screen 8 includes a tubular filter body 801, and also includes an independent impurity storage tank 9. The top of the impurity storage tank 9 is open, and the bottom is provided with a bottom plate to filter. The main body 801 is detachably sleeved or directly fixed outside the impurity storage tank 9; when the filter screen 8 is replaced, the impurity storage tank 9 can be independently taken out and the impurities stored in it can be poured out. Remove them together, otherwise impurities will leak from the bottom. The bottom edge of the impurity storage tank 9 can also be provided with a protruding socket portion 805 to cooperate with the two socket holes 6 provided on the bottom edge of the plugging connection portion 4 for pre-installation.

As shown in Figure 11 and Figure 12, it is an optional solution for the fluid inlet 802 on the upper side of the filter body 801. As shown in Figure 11, the fluid inlet 802 on the upper side of the filter body 801 is a tubular filter body 801 passing through two Cutting is formed, wherein one cutting direction is to cut downward along the diameter of the circular edge of the filter body 801 top, and the other cutting direction is to cut obliquely upward from the side, the two cutting directions intersect, and the removed part forms the fluid inlet 802; The main body 801 essentially includes an impurity storage chamber at the bottom and a semi-cylindrical filter portion 806 . As shown in FIG. 12 , another alternative solution for the fluid inlet 802 is: cutting obliquely upward from the side of the filter body 801 to the top circular edge of the filter body 801 to form a space elliptical fluid inlet 802 .

It can be understood that the present invention is described through some embodiments, and those skilled in the art know that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of the present invention. In addition, the features and examples may be modified to adapt a particular situation and material to the teachings of the invention without departing from the spirit and scope of the invention. Therefore, the present invention is not limited by the specific embodiments disclosed here, and all embodiments falling within the scope of the claims of the present application belong to the protection scope of the present invention.

Claims (10)

1. A built-in ball valve with a filter structure, including a valve body (1), the valve body (1) is provided with a valve cavity and a medium inlet and a medium outlet connected to the valve cavity; a spherical opening and closing member (2 ), the spherical opening and closing part (2) is linked with the valve stem (3); the opening and closing part is provided with a first channel (201), and the first channel (201) is used to communicate with the medium inlet and the medium outlet; its It is characterized in that a second channel (202) is opened on the side opposite to the valve stem (3) on the valve body (1) and the spherical opening and closing member (2), and the second channel (202) runs through the valve body downwards (1) The wall forms a first opening, and the second channel (202) communicates upward with the first channel (201) of the spherical opening and closing member (2); the filter net (8) can be inserted from the first opening, so The filter (8) extends into the first channel (201) in the center of the opening and closing member, and is used to intercept impurities in the fluid passing through the first channel (201); the first opening is provided with a blocking structure. 2. The ball valve with a built-in filter structure according to claim 1, characterized in that, the second channel (202) extends upwards, and a limiting groove (203) is formed on the inner wall of the spherical opening and closing member (2). 3. The ball valve with a built-in filter structure according to claim 1, characterized in that a plugging connection part (4) is provided on the wall of the valve body and at the first opening, and the plugging connection part (4) adopts a plugging part (5 ) to block. 4. The ball valve with built-in filter structure according to claim 3, characterized in that, the plugging connection part (4) is a section of externally threaded connecting pipe extending downwards, and the plugging part (5) has an inner A threaded cover body, the cover body is threadedly connected to the plugging connection part (4) to close the second channel (202). 5. The ball valve with built-in filter structure according to any one of claims 1-4, characterized in that, the filter screen (8) includes a tubular filter body (801), and the filter body (801) is covered with filter holes; The upper side of the filter body (801) is provided with a fluid inlet (802), and the lower part of the filter body (801) forms an impurity storage chamber; after the filter (8) is installed, the fluid inlet (802) on the side of the filter body (801) faces the valve body (1) The medium inlet and the impurity storage chamber are located below the first channel (201). 6. The ball valve with built-in filter structure according to claim 5, characterized in that, the filter body (801) is a mesh tube made of polymer fiber or mineral fiber, or a mesh tube made of stainless steel wire mesh. 7. The ball valve with a built-in filter structure according to claim 6, characterized in that, an annular first support ring (803) is provided inside the upper edge of the filter body (801), and an annular first support ring (803) is provided inside the lower edge of the filter body (801). An annular second support ring (804). 8. The ball valve with built-in filter structure according to claim 5, characterized in that, the filter screen (8) and the second channel (202) are clearance fit, and the diameter of the filter screen (8) is the same as that of the first channel (201 ) is equal to or larger than the diameter of the first channel (201). 9. The ball valve with built-in filter structure according to claim 5, characterized in that, the filter screen (8) is pre-installed with the plugging connection part (4) or the plugging part (5) through a detachable connection structure, and the filter After the net (8) is installed, the fluid inlet (802) of the filter net (8) is facing the medium inlet of the valve body (1). 10. The ball valve with built-in filter structure according to claim 9, characterized in that two opposite insertion holes (6) are opened on the bottom edge of the plugging connection part (4), and two opposite insertion holes (6) are opened on the bottom edge of the filter net (8). After the two socket holes (6) on the bottom edge of the filter (8) are aligned with the socket holes (6) on the bottom edge of the plugging connection (4), use a pin (7) ) is stuck in the two socket holes (6), and the tubular filter screen (8) is temporarily fixed on the valve body (1); The socket part (805) corresponding to the socket hole (6), the socket part (805) protrudes from the side wall of the filter screen (8), and can be plugged into the two socket holes (6) of the connecting part (4) middle.

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