Simple type live joint ball valve of PVC and its using method

Abstract

The present application relates to the technical field of ball valve, especially to a PVC simple type loose joint ball valve and its using method, which comprises a ball valve body, two connecting heads and abutting rings arranged at two ends of the ball valve body, two loose joint assemblies arranged at the two connecting heads respectively, each loose joint assembly comprising a plurality of inner supports distributed along the pipe in a ring shape, two adjacent inner supports being hinged to each other, one end of each inner support extending into the pipe and the other end being provided with a mounting plate, the outer side surface of each inner support being further provided with a first inclined surface, a sealing element covering all the mounting plates, a plurality of outer supports distributed along the pipe in a ring shape, the outer side surface of each outer support being provided with a rotating ring, one end of each outer support abutting against the outer side surface of the pipe and the inner side surface of the other end being provided with a second inclined surface, the inner and outer side surfaces of the abutting ring abutting against the first and second inclined surfaces respectively after installation, an installation sleeve being threadedly connected to one end of the connecting head and provided with an abutting plate at the other end, the abutting plate abutting against the end surface of the outer support, and the rotating ring abutting against the inner wall of the installation sleeve. The present application can effectively improve the convenience of installation of the loose joint ball valve.

Description

Technical Field

[0001] This invention relates to the field of ball valve technology, and in particular to a simple PVC union ball valve and its usage method. Background Technology

[0002] A union ball valve is a type of valve that combines the structure of a ball valve with a detachable connection design. It features union fittings at both ends for easy installation and disassembly, making it suitable for piping systems requiring frequent maintenance or replacement. In existing union ball valves, the connection to the pipeline is typically achieved through an interference fit. This means the union fitting has a connecting pipe that extends into the pipeline, and the outer side of the connecting pipe is fitted against the inner wall of the pipeline using an interference fit. If the fit is not tight, the union ball valve can easily become loose, and leaks can occur at the connection point. Therefore, the interference fit is usually kept relatively large. However, this large interference fit makes the union ball valve difficult to install. For example, when both sides of the pipeline are fixed, it is difficult to insert or remove the ball valve between the two pipe openings; due to the interference fit, the connecting pipe needs to be twisted to insert it into the pipeline, but once one side of the pipeline is connected, the other side becomes inconvenient to operate, among other problems. Therefore, a union ball valve with easier installation is needed. Summary of the Invention

[0003] This invention provides a simple PVC union ball valve and its usage method, which can effectively solve the problems in the background art.

[0004] This invention provides a simple PVC union ball valve, comprising:

[0005] The ball valve body has connectors at both ends, and each connector has an abutment ring on its end face;

[0006] Two union assemblies are respectively located at the two connectors. Each union assembly includes:

[0007] Multiple internal supports are distributed circumferentially along the pipeline, and adjacent internal supports are hinged to each other; one end of each internal support extends into the pipeline, and the other end is provided with a mounting plate extending radially outward along the pipeline, and the outer side is also provided with a first inclined surface, and the mounting plate is located between the pipeline and the first inclined surface.

[0008] Sealing element, mounting plate that covers all internal supports;

[0009] Multiple external supports are distributed circumferentially along the pipeline; each external support has a raised rotating ring on its outer side, with one end abutting against the outer side of the pipeline and the other end having a second inclined surface on its inner side.

[0010] After installation, the inner side of the abutment ring abuts against the first inclined surface, and the outer side of the abutment ring abuts against the second inclined surface;

[0011] The mounting sleeve has one end threaded to the connector and the other end fitted with an abutment plate extending radially inward along the pipe, which abuts against the end face of the outer bracket; the rotating ring abuts against the inner wall of the mounting sleeve.

[0012] Furthermore, each inner bracket has an arc-shaped protrusion on one side and an arc-shaped groove on the other side. When two adjacent inner brackets are installed, the arc-shaped protrusion of one inner bracket extends into the arc-shaped groove of the other inner bracket.

[0013] Furthermore, each outer bracket has an arc-shaped protrusion on one side and an arc-shaped groove on the other side. When two adjacent outer brackets are installed, the arc-shaped protrusion of one outer bracket extends into the arc-shaped groove of the other outer bracket.

[0014] Furthermore, the end of the outer support facing the abutment plate has a curved structure.

[0015] Furthermore, a force transmission groove is provided at the end of the outer bracket facing the connector; the outer side of the mounting plate extends into the force transmission groove.

[0016] Furthermore, the end face of the abutment ring facing the mounting plate is tapered.

[0017] Furthermore, the sealing element includes a first sealing gasket and a second sealing gasket, the first sealing gasket being disposed between the mounting plate and the pipe, and the second sealing gasket being disposed between the mounting plate and the connector; an extension section extending towards the mounting plate is provided on the outer side of the first sealing gasket, and the extension section abuts against the second sealing gasket.

[0018] Furthermore, the second sealing gasket is radially aligned with the second bevel in the pipe; the extension extends to the second bevel.

[0019] Furthermore, the mounting sleeve has an external hexagonal structure at the end near the connector.

[0020] This invention also provides a method for using a simple PVC union ball valve, applicable to the aforementioned simple PVC union ball valve, comprising the following steps:

[0021] Unscrew the mounting sleeve from the connector, and while keeping multiple outer supports inside the mounting sleeve, put the mounting sleeve over the pipe.

[0022] Keep the seals covering the multiple inner supports, and then insert one end of the inner support into the pipe;

[0023] Bring the connector close to the inner bracket, then screw the mounting sleeve back onto the connector to complete the installation.

[0024] The technical solution of this invention can achieve the following technical effects:

[0025] This swivel ball valve, through the cooperation of its inner support, seal, outer support, and mounting sleeve, can quickly and easily connect and install with pipelines without requiring any twisting or other operations on the valve or pipeline. This ensures a secure connection between the valve and the pipeline, making it suitable for various applications where space is limited or pipelines are difficult to move. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of the PVC simplified union ball valve of the present invention;

[0028] Figure 2 This is an exploded view of the PVC simplified union ball valve of the present invention;

[0029] Figure 3 This is a cross-sectional view of the PVC simplified union ball valve of the present invention;

[0030] Figure 4 for Figure 3 Enlarged view of point A;

[0031] Figure 5 This is a schematic diagram of the internal support structure in this invention;

[0032] Figure 6 This is a schematic diagram of the structure of the external support in this invention.

[0033] Reference numerals in the attached drawings: 1. Ball valve body; 11. Connector; 12. Abutment ring; 2. Inner support; 21. Mounting plate; 22. First inclined surface; 3. Seal; 31. First sealing gasket; 32. Second sealing gasket; 33. Extension section; 4. Outer support; 41. Rotating ring; 42. Second inclined surface; 43. Force transmission groove; 5. Mounting sleeve; 51. Abutment plate. Detailed Implementation

[0034] The basic principles and main features of the technical solution of the present invention will be described below with reference to the accompanying drawings of the embodiments of the present invention. The following description will use one or more embodiments for a more intuitive understanding. These embodiments are merely some, not all, of the embodiments of the present invention.

[0035] In the description of this invention, the terms indicating orientation or positional relationship (such as up, down, left, right, etc.) are based on the orientation shown in the drawings or some conventional positional relationships, and are only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the features referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting this invention.

[0036] This invention relates to a simple PVC union ball valve, such as... Figures 1-2 As shown, it includes:

[0037] The main structure of the ball valve body 1 includes a valve body and a ball disposed in the valve body. The ball has a through hole. By rotating the handle connected to the ball, the orientation of the through hole in the valve body can be changed, thereby controlling the opening and closing of the ball valve body 1. The structure and principle of the ball valve body 1 are existing technologies, so the rest will not be described in detail.

[0038] In addition to the existing structure described above, the two ends of the ball valve body 1 also need to be provided with connectors 11, and each connector 11 has an abutment ring 12 on its end face. The connectors 11 and abutment rings 12 are integral with the valve body of the ball valve body 1.

[0039] Two union assemblies are respectively installed at two connectors 11, and the ball valve body 1 and the pipes on both sides are connected and fixed through the union assemblies.

[0040] The specific structure of each live joint component is as follows: Figures 3-6 As shown, the system includes an inner bracket 2, a seal 3, an outer bracket 4, and a mounting sleeve 5. The specific structure of each component is as follows:

[0041] Multiple inner supports 2 are distributed circumferentially along the pipeline, and all inner supports 2 are combined to form a tubular assembly; adjacent two inner supports 2 are hinged to each other, and the hinge axis is perpendicular to the pipeline axis, so that the two ends of each inner support 2 can move closer to and further away from the inner side of the pipeline; one end of each inner support 2 extends into the pipeline, and the other end is provided with a mounting plate 21 extending radially outward along the pipeline, and the outer side is also provided with a first inclined surface 22, and the mounting plate 21 is located between the pipeline and the first inclined surface 22.

[0042] The seal 3 has a groove-shaped cross-section, which covers both end faces and sides of the mounting plates 21 of all the inner brackets 2, thereby filling the gaps between the mounting plates 21.

[0043] Multiple external supports 4 are distributed circumferentially along the pipe, and all external supports 4 are combined to form a tubular assembly; each external support 4 has a raised rotating ring 41 on its outer side, one end of the external support 4 abuts against the outer side of the pipe, and the inner side of the other end is provided with a second inclined surface 42.

[0044] The mounting sleeve 5 has one end threadedly connected to the connector 11, and the other end is provided with an abutment plate 51 extending radially inward along the pipe. The abutment plate 51 abuts against the end face of the outer bracket 4. The rotating ring 41 abuts against the inner wall of the mounting sleeve 5, so that the two ends of each outer bracket 4 can move closer to and away from the outer side of the pipe.

[0045] After the mounting sleeve 5 is installed on the connector 11, the inner side of the abutment ring 12 abuts against the first inclined surface 22, causing one end of the first inclined surface 22 in the inner support 2 to tend to rotate away from the inner side of the pipe; the outer side of the abutment ring 12 abuts against the second inclined surface 42, causing one end of the second inclined surface 42 in the outer support 4 to tend to rotate away from the outer side of the pipe.

[0046] Except for the seal 3, which needs to be made of rubber, the inner support 2, outer support 4, and mounting sleeve 5 can be made of stainless steel, copper alloy, or PVC plastic, depending on the requirements. The number of inner supports 2 and outer supports 4 is adjusted according to the diameter of the pipe; the larger the diameter, the more inner supports 2 and outer supports 4 are needed.

[0047] Based on the aforementioned PVC simple union ball valve, this invention also relates to a method of using the PVC simple union ball valve to achieve the connection between the PVC simple union ball valve and the pipes on both sides. The steps include a preparation step, an assembly step, and a locking step, each step being as follows:

[0048] Preparation steps: When the PVC simple union ball valve leaves the factory, the union assembly is installed on the ball valve body 1. Therefore, the mounting sleeve 5 needs to be unscrewed from the connector 11. After unscrewing, the outer bracket 4 and the mounting sleeve 5 may separate. Multiple outer brackets 4 need to be reassembled into a cylindrical whole and placed back into the mounting sleeve 5. Then, keeping multiple outer brackets 4 in the state inside the mounting sleeve 5, put the mounting sleeve 5 on the pipe. When putting it on, the threaded end should face the direction where the ball valve body 1 needs to be installed on the two pipes. The preparation steps are now complete.

[0049] Assembly steps: Assemble multiple inner brackets 2 into a tubular assembly. Then, keeping the sealing element 3 enclosing the inner brackets 2, insert one end of each inner bracket 2 into the pipe. Since one end of the first inclined surface 22 of the inner bracket 2 is not restricted, each inner bracket 2 can wobble slightly like a seesaw, making it easy to insert into the pipe. After placement, only the mounting plate 21 and the portion of the first inclined surface 22 of the inner bracket 2 will protrude from the pipe.

[0050] Locking Procedure: Place the ball valve body 1 between the two pipes, bringing the connector 11 close to and abutting against the inner supports 2 on both pipes. Then, screw the mounting sleeve 5 back onto the connector 11. As the mounting sleeve 5 is screwed in, the abutment ring 12 will contact the first inclined surface 22 and the second inclined surface 42. Then, as the mounting sleeve 5 is screwed in further, the inner side of the mounting sleeve 5 will abut against the first inclined surface 22, causing that end of the inner support 2 to tend to rotate away from the inner side of the pipe, while the other end will tend to rotate close to the inner side of the pipe. This causes the assembly formed by the inner support 2 to open in the pipe section and clamp the pipe. The outer side of the mounting sleeve 5 will abut against the second inclined surface 42, causing that end of the outer support 4 to tend to rotate away from the outer side of the pipe, while the other end will tend to rotate close to the outer side of the pipe. This causes the assembly formed by the outer support 4 to contract in the pipe section and clamp the pipe. Furthermore, as the outer support 4 rotates, it will also tend to pull the connector 11 towards the pipe, thus pressing the seal 3 tighter and improving the sealing effect. The installation is complete once the threaded section of the mounting sleeve 5 is fully screwed onto the connector 11.

[0051] As can be seen, this swivel ball valve can be quickly and easily connected and installed with the pipeline without any twisting or other operations on the valve or the pipeline. This ensures a tight connection between the valve and the pipeline, making it suitable for various applications where space is limited or pipelines are difficult to move.

[0052] To facilitate the installation of the inner support 2, the preferred structure of each inner support 2 is as follows:

[0053] The inner support 2 has an arc-shaped protrusion or an arc-shaped groove on its side. When two adjacent inner supports 2 are installed, the arc-shaped protrusion of one inner support 2 extends into the arc-shaped groove of the other inner support 2, and the arc-shaped protrusion and the arc-shaped groove will fit completely. At least one side of the inner support 2 near the ball valve body 1 is left with a gap to allow for the rotation of the inner support 2. Preferably, one side of the inner support 2 is provided with an arc-shaped protrusion and the other side is provided with an arc-shaped groove, so that the shape of each inner support 2 is consistent, which facilitates the mass production of the inner support 2.

[0054] To prevent excessive radial misalignment between the outer supports 4, arc-shaped protrusions or grooves can be provided on the sides of the outer supports 4. When two adjacent outer supports 4 are installed, the arc-shaped protrusion of one outer support 4 extends into the arc-shaped groove of the other outer support 4, thereby creating axial mutual restraint between the outer supports 4. Similarly to the inner support 2, it is preferable to provide an arc-shaped protrusion on one side and an arc-shaped groove on the other side of the outer support 4. This ensures that the shape of each outer support 4 is consistent, facilitating mass production of the outer supports 4.

[0055] Since the outer support 4 needs to be able to rotate, its end facing the abutment plate 51 is preferably designed as a curved structure. This will not affect the contact between the outer support 4 and the abutment plate 51, and will also allow the outer support 4 to rotate normally. The axis of the curved structure and the rotating ring 41 should be aligned radially with the pipe as much as possible.

[0056] Preferably, a force transmission groove 43 is provided at the end of the outer bracket 4 facing the connector 11. The cross-section of the force transmission groove 43 is L-shaped. After the ball valve is installed, the outer side of the mounting plate 21 will extend into the force transmission groove 43 and abut against the bottom surface of the force transmission groove 43. In this structure, the outer diameter of the mounting plate 21 will definitely be larger than the diameter of the pipe. Figure 4 As shown, after the mounting sleeve 5 is installed, the abutment plate 51 will exert a certain pressure on the outer bracket 4. This pressure will be transmitted to the mounting plate 21 and then to the connector 11. In this way, the outer bracket 4 and the connector 11 can clamp the mounting plate 21, thereby making the inner bracket 2 tightly fixed with other parts of the swivel ball valve, ensuring that the components will not loosen or fall off. Under this clamping effect, the seal 3 will also fit more tightly with other components, thus ensuring the sealing effect of the swivel ball valve. In this structure, it is preferable to set the end face of the abutment ring 12 facing the mounting plate 21 as a cone with a diameter that gradually decreases towards the pipeline direction. The cone angle of this cone is close to 180°. When the mounting plate 21 is pressed against the abutment ring 12 by the pressure of the outer bracket 4, the cone surface inclined to the pipeline axis can make the mounting plate 21 also tend to rotate inward, thereby making the other end of the inner bracket 2 fit more tightly against the pipeline. The rotating ring 41 of the outer support 4 is preferably aligned radially with the force transmission groove 43 in the pipeline, thereby strengthening the corner of the force transmission groove 43 and effectively improving the deformation resistance of the corner of the force transmission groove 43.

[0057] The sealing element 3 can be a single piece, but due to the volume of the mounting plate 21, a single-piece sealing element 3 is not easy to install. Therefore, in this swivel ball valve, the sealing element 3 is preferably designed as a split structure, including a first sealing gasket 31 and a second sealing gasket 32. The first sealing gasket 31 is located between the mounting plate 21 and the pipe, and the second sealing gasket 32 ​​is located between the mounting plate 21 and the connector 11. An extension section 33 extending towards the mounting plate 21 is provided on the outer side of the first sealing gasket 31, so that the cross-section of the first sealing gasket 31 forms an L-shaped structure and the end face of the first sealing gasket 31 forms a bowl shape, allowing the inner support 2 to be easily inserted, and the extension section 33 limits the movement to prevent loosening. After the swivel ball valve is installed, the extension section 33 abuts against the second sealing gasket 32, so that the sealing element 3 forms a complete structure that covers the mounting plate 21.

[0058] Preferably, the second sealing gasket 32 ​​and the second inclined surface 42 are aligned radially in the pipeline, and the extension section 33 extends to the second inclined surface 42. In this way, after the ball valve is installed, the contact area between the extension section 33 and the second sealing gasket 32 ​​will extend towards the slope of the second inclined surface 42, thereby allowing the extension section 33 and the second sealing gasket 32 ​​to have more compression space. This increases the final contact area between the two, ensuring the sealing effect at the contact point.

[0059] Since both the inner support 2 and the outer support 4 require a certain amount of rotation space, the end of the mounting sleeve 5 near the pipe has a lot of internal gaps, which makes it easy to deform when subjected to external pressure. Therefore, the external hexagonal structure required for tightening the thread is set at the end of the mounting sleeve 5 near the connector 11. The thread can provide good support for the structure at this end of the mounting sleeve 5 and prevent the mounting sleeve 5 from deforming.

[0060] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A simple PVC union ball valve, characterized in that, include: The ball valve body (1) has connectors (11) at both ends, and each connector (11) has an abutment ring (12) on its end face; Two union assemblies are respectively disposed at the two connectors (11), each union assembly comprising: Multiple inner supports (2) are distributed circumferentially along the pipe, and two adjacent inner supports (2) are hinged to each other; one end of each inner support (2) extends into the pipe, and the other end is provided with an installation plate (21) extending radially outward along the pipe, and the outer side is also provided with a first inclined surface (22), and the installation plate (21) is located between the pipe and the first inclined surface (22); The sealing element (3) covers the mounting plate (21) of all the inner supports (2); Multiple external supports (4) are distributed along the circumferential direction of the pipe; each external support (4) has a raised rotating ring (41) on its outer side, with one end abutting against the outer side of the pipe and the other end having a second inclined surface (42) on its inner side. The outer bracket (4) is provided with a force transmission groove (43) at one end facing the connector (11); the outer side of the mounting plate (21) extends into the force transmission groove (43); After installation, the inner side of the abutment ring (12) abuts against the first inclined surface (22), and the outer side of the abutment ring (12) abuts against the second inclined surface (42); The mounting sleeve (5) has one end threadedly connected to the connector (11), and the other end is provided with an abutment plate (51) extending radially inward along the pipe. The abutment plate (51) abuts against the end face of the outer bracket (4); the rotating ring (41) abuts against the inner wall of the mounting sleeve (5). The sealing element (3) includes a first sealing gasket (31) and a second sealing gasket (32). The first sealing gasket (31) is disposed between the mounting plate (21) and the pipe, and the second sealing gasket (32) is disposed between the mounting plate (21) and the connector (11). An extension section (33) extending toward the mounting plate (21) is provided on the outer side of the first sealing gasket (31), and the extension section (33) abuts against the second sealing gasket (32).

2. The PVC simplified union ball valve according to claim 1, characterized in that, Each inner bracket (2) has an arc-shaped protrusion on one side and an arc-shaped groove on the other side. When two adjacent inner brackets (2) are installed, the arc-shaped protrusion of one inner bracket (2) extends into the arc-shaped groove of the other inner bracket (2).

3. The PVC simplified union ball valve according to claim 1, characterized in that, Each of the outer brackets (4) has an arc-shaped protrusion on one side and an arc-shaped groove on the other side. When two adjacent outer brackets (4) are installed, the arc-shaped protrusion of one outer bracket (4) extends into the arc-shaped groove of the other outer bracket (4).

4. The PVC simplified union ball valve according to claim 1, characterized in that, The outer support (4) has a curved structure at one end facing the abutment plate (51).

5. The PVC simplified union ball valve according to claim 1, characterized in that, The end face of the abutment ring (12) facing the mounting plate (21) is tapered.

6. The PVC simplified union ball valve according to claim 1, characterized in that, The second sealing gasket (32) is radially aligned with the second inclined surface (42) in the pipe; the extension (33) extends to the second inclined surface (42).

7. The PVC simplified union ball valve according to claim 1, characterized in that, The mounting sleeve (5) has an external hexagonal structure at one end near the connector (11).

8. A method for using a simple PVC union ball valve, characterized in that, For use in the PVC simple type union ball valve as described in any one of claims 1 to 7, the steps include: Unscrew the mounting sleeve (5) off the connector (11), and then, while keeping the multiple outer supports (4) inside the mounting sleeve (5), put the mounting sleeve (5) on the pipe. Keep the seal (3) covering the multiple inner supports (2), and then insert one end of the inner support (2) into the pipe; Bring the connector (11) close to the inner bracket (2), and then screw the mounting sleeve (5) back onto the connector (11) to complete the installation.

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