Ball valve plug

Abstract

The ball valve core provided by the application comprises a ball body, the ball body has an inner cavity and at least two pipeline connecting holes in communication with the inner cavity, the ball valve core comprises a ball body heating unit for heating the inner cavity, and a lead wire of the ball body heating unit is led out from the outside of the ball body. The ball valve core disclosed by the application has the advantages that the heating lead wire of the ball valve core is led out of the ball valve and connected with an electric circuit, so that the heating lead wire is not easy to be damaged, the overall sealing performance of the ball valve is good, and the maintenance cost is low and the maintenance steps are simple when the lead wire is replaced.

Description

Technical Field

[0001] This application relates to the field of machinery, and more specifically, to a ball valve core. Background Technology

[0002] The working principle of a ball valve mainly relies on the sealing ball rotating 90° around the center line of the valve body to achieve the purpose of opening and closing. The ball is rotated by the valve stem. When the ball hole is parallel to the pipeline, the valve is open, and vice versa.

[0003] However, if the operating temperature of the ball valve is too low, or if the medium flowing through the ball valve is a low-temperature gas or liquid, the ball valve material may become brittle, easily leading to cracks or poor sealing. In low-temperature environments, the medium may also precipitate or solidify, causing blockage of the ball valve and making it difficult to operate, preventing it from closing completely or fully opening. Current technology often uses electric heating to heat the valve body and thus the medium; however, in the structural design, the heating wire is often placed inside the ball valve cavity or valve stem.

[0004] The placement of the heating wire inside the ball valve cavity or valve stem has the following drawbacks: First, the low temperature or corrosiveness of the medium fluid can easily damage the wire. Second, because the valve stem needs to be rotated and opened and closed multiple times during operation, the heating element wire will be twisted repeatedly, which will also cause damage to the wire, thus causing the heating function of the ball valve to fail. When the wire needs to be replaced, the entire ball valve needs to be disassembled to replace the wire, which is costly and complicated. In addition, the existing technology of placing the heating wire inside the ball valve cavity or valve stem will result in poor sealing performance of the heatable ball valve. Utility Model Content

[0005] In view of this, this application proposes a ball valve core in which the heating wire of the ball valve core is led out of the ball valve and connected to the circuit, which makes the heating wire less susceptible to damage, the overall sealing performance of the ball valve good, and the maintenance cost and maintenance steps are low when replacing the wire.

[0006] The ball valve core provided in this application includes a ball, the ball having an inner cavity and at least two pipe connection holes communicating with the inner cavity, and the ball valve core including a ball heating unit for heating the inner cavity, the wires of the ball heating unit being led out from the outside of the ball.

[0007] Preferably, the sphere has a hollow structure, and the sphere heating unit is installed on the part of the sphere that forms the inner cavity of the sphere.

[0008] Preferably, the side wall portion of the sphere is provided with a mounting groove, and the sphere heating unit is accommodated in the mounting groove.

[0009] Preferably, the sphere includes a notch and a crown that are joined together, the inner cavity is located within the notch, and the mounting groove is disposed on the joint surface of the notch and / or the crown;

[0010] A through hole is provided at the rotation center of the spherical crown, and the wire passes through the through hole.

[0011] Preferably, the spherical heating unit is fixedly disposed on the joint surface of the spherical notch, and the spherical heating unit includes a base and an electric heating element fixedly disposed on the base.

[0012] Preferably, the surface of the base is provided with multiple sets of symmetrical, concentric annular grooves, and the heating element is housed in the annular grooves.

[0013] Preferably, the ball valve core further includes a wire sealing assembly for accommodating the wire and sealing the fluid passing through the ball valve.

[0014] Preferably, the wire sealing assembly includes an internal air-connected wire interface, a wire conduit, and a sealing joint that are sequentially sealed together. The wire interface is fixedly disposed on the valve body and corresponds to the position of the ball crown through hole. The sealing joint has a conical joint cavity.

[0015] Preferably, the ball valve core has a rotating interface, which is disposed on the portion of the ball forming the inner cavity sidewall and is spaced apart from the surface of the inner cavity.

[0016] Preferably, the mounting groove is spaced 180 degrees from the rotating interface and has the same mounting rotation axis A, which coincides with the working rotation axis B of the sphere.

[0017] The ball valve core of this application has its heating wire led out to the outside of the ball valve and connected to the circuit, which makes the heating wire less susceptible to damage, the overall sealing performance of the ball valve good, and the maintenance cost and maintenance steps are low when replacing the wire.

[0018] Other features and advantages of this application will be described in detail in the following detailed description section. Attached Figure Description

[0019] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application, and the illustrative embodiments and descriptions thereof are used to explain this application. In the drawings:

[0020] Figure 1 This is a three-dimensional schematic diagram of the ball valve core of this application;

[0021] Figure 2This is a front perspective view of the ball valve core of this application;

[0022] Figure 3 This is a cross-sectional schematic diagram of the ball valve core of this application;

[0023] Figure 4 This is a cross-sectional schematic diagram of the crown portion of this application;

[0024] Figure 5 This is the front view of the crown portion of this application;

[0025] Figure 6 This is a cross-sectional schematic diagram of the ball valve of this application;

[0026] Figure 7 This is a cross-sectional schematic diagram of the pipe connector of this application;

[0027] Figure 8 This is a front view of the valve body connecting seat of this application;

[0028] Figure 9 This is a top view of the valve body connecting seat of this application;

[0029] Figure 10 This is a three-dimensional schematic diagram of the valve body connection seat of this application;

[0030] Figure 11 This is a three-dimensional schematic diagram of the pipe connector of this application;

[0031] Figure 12 This is a cross-sectional schematic diagram of the pipe connector of this application.

[0032] Figure Descriptions: 1-Ball valve core; 11-Ball; 111-Inner cavity; 112-Pipe connection hole; 12-Ball heating unit; 121-Base; 122-Heating element; 13-Wire; 14-Ball notch; 15-Ball crown; 151-Ball crown through hole; 16-Rotation interface; 17-Mounting groove; 2-Valve body; 21-Pipe port; 22-Wire sealing assembly; 221-Wire interface; 222-Wire pipe; 223-Sealing joint; 3-Pipe connector; 31-Pipe heating unit; 32-Pipe heating wire; 33-Valve body connecting seat; 331-Annular cavity; 34-Pipe port connecting seat; 341-Annular groove structure; 4-Electric component; 41-Motor; 42-Electric controller; Detailed Implementation

[0033] To more clearly illustrate the embodiments of this utility model or the technical solutions in the prior art, the drawings used in the specific embodiments will be briefly described below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

[0034] The technical solution of this application will now be described in detail with reference to the accompanying drawings and embodiments.

[0035] The ball valve core 1 in the specific embodiments of this application is as follows: Figure 1 As shown, the ball valve core 1 includes a ball 11, the ball 11 having an inner cavity 111 and two pipe connection holes 112 communicating with the inner cavity 111. The ball valve core 1 includes a ball heating unit 12 for heating the inner cavity 111, and the wires 13 (not shown in the figure) of the ball heating unit 12 are led out from the outside of the ball 11.

[0036] The ball valve core 1 proposed in this application has a ball heating unit 12 disposed within the interlayer of the ball 11. A wire 13 is electrically connected to the ball heating unit 12, and the wire 13 extends from the outside of the ball 11. The fluid flowing through the ball valve does not come into contact with the wire 13. Regardless of the temperature or corrosiveness of the fluid, the safety of the wire 13 is not affected. Because the wire 13 is not located within the control stem cavity of the ball valve, it will not twist with the repeated rotation of the valve stem during operation, thus avoiding the torsional torque and improving electrical safety.

[0037] In a specific embodiment of this application, the sphere 11 has a hollow structure, and the sphere heating unit 12 is installed on the side wall of the sphere 11 that forms the inner cavity 111.

[0038] The sphere 11 is made of a metal with good thermal conductivity. The sphere heating unit 12 is disposed inside the side wall of the sphere, and the wire 13 is led out of the sphere 11. When the sphere heating unit 12 is electrically heated, heat is transferred from the sphere heating unit 12 to the sphere 11, and then further dissipated into the fluid medium flowing through the ball valve, so that the temperature of the fluid medium is higher than the ambient temperature, preventing substances in the fluid medium from precipitating into solids.

[0039] like Figure 2 As shown, the side wall of the sphere 11 is provided with a mounting groove 17, and the sphere heating unit 12 is accommodated in the mounting groove 17.

[0040] The cavity space inside the mounting slot 17 becomes the mounting space for accommodating the spherical heating unit 12. Preferably, the geometric parameters of the shape of the inner cavity of the mounting slot 17 are adapted to the geometric parameters of the outer shape of the spherical heating unit 12, so that the spherical heating unit 12 can be stably installed in the mounting slot 17.

[0041] The sphere 11 includes a notch 14 and a crown 15 that engage with each other. An inner cavity 111 is located inside the notch 14, and a mounting groove 17 is provided on the engagement surface of the notch 14 and / or the crown 15.

[0042] The sphere 11 is divided into two parts along a plane not located on the plane of symmetry. The larger part is the spherical cap 14, and an inner cavity 111 is provided at the center of the spherical cap 14, which is a through hole penetrating the surface of the spherical cap 14. The penetration point between the inner cavity 111 and the surface of the spherical cap 14 forms two pipe connection holes 112. In this specific embodiment, the mounting groove 17 is provided on the mating surface of the spherical crown 15, but it can also be provided on the mating surface of the spherical cap 14. In use, since the spherical cap 14 and the spherical crown 15 are ultimately combined to form the sphere 11, the purpose of transferring heat to the entire sphere 11 can be achieved regardless of the installation position of the mounting groove 17. It should be noted that when the mounting groove 17 is provided on the mating surface of the spherical cap 14, the inner cavity of the mounting groove 17 is isolated from the inner cavity 111 of the sphere 11 to avoid corrosion of the sphere heating unit 12 by the fluid medium flowing through the sphere 11.

[0043] like Figure 4 and Figure 5 The image shows the spherical crown portion 15 in this specific embodiment, which is fixedly connected to the spherical notch portion 14. A spherical crown through-hole 151 is provided at the rotation center of the spherical crown portion 15, through which the wire 13 passes. This arrangement is to ensure that the wire 13 is positioned on a smaller concentric circle of the rotation axis of the sphere 11, maximizing the electrical connection requirements to the sphere heating unit 12 while minimizing the torsional torque on the wire 13.

[0044] like Figure 1 and Figure 2 As shown, in this specific embodiment, the spherical heating unit 12 is fixedly disposed on the mating surface of the spherical notch 14. The spherical heating unit 12 includes a base 121 and an electric heating element 122 fixedly disposed on the base 121. The surface of the base 121 is provided with multiple sets of symmetrical, concentric annular grooves, and the electric heating element 122 is accommodated in the annular grooves. The electric heating element 122 is a wire-wound resistance wire.

[0045] like Figure 2 and Figure 3As shown, in a preferred embodiment, the ball valve core 1 has a rotating interface 16, which is disposed on the side wall of the ball 11 forming the inner cavity 111 and is spaced apart from the surface of the inner cavity 111.

[0046] The mounting slot 17 and the rotating interface 16 are spaced 180 degrees apart and have the same mounting rotation axis A, which coincides with the working rotation axis B of the ball 11.

[0047] During the rotation of the sphere 11, the power for rotation comes from the power element installed in the rotary interface 16. The shape of the rotary interface is not limited to the elongated slotted interface in the specific embodiment; it can also be a cylindrical interface with a keyway or a hexagonal inner cavity. The rotation axis A of the rotary interface coincides with the axis of the sphere and the rotation axis B of the mounting groove 17. Thus, when the power element drives the sphere 11 to rotate 90°, the mounting groove 17, on which the sphere heating unit 12 is installed, and the spherical crown 15 also rotate synchronously by 90°, resulting in better sealing performance of the sphere 11 during operation.

[0048] like Figure 6 and Figure 7 As shown, according to a specific embodiment of this application, the ball valve includes the ball valve core 1 described above, and also includes a valve body 2. The valve body 2 includes a cavity that matches the ball 11 and a plurality of ports 21 communicating with the cavity. The ports 21 are configured to selectively communicate with a pipe connection hole 112 by rotating the ball 11. The ball valve also includes a wire sealing assembly 22 connected to the valve body 2 in air communication. The wire sealing assembly 22 is used to accommodate a wire 13 and seal the fluid medium passing through the ball valve.

[0049] Furthermore, the wire sealing assembly 22 includes a wire interface 221, a wire conduit 222, and a sealing joint 223, which are internally air-connected and sequentially sealed. The wire interface 221 is fixedly disposed on the valve body 2, corresponding to the position of the ball crown through hole 151. The connection between the wire interface 221 and the valve body 2 is a fixed connection, which can be a threaded connection or welding. One end of the wire conduit 222 is sealed and fixedly connected to the wire interface 221, and the other end is sealed and fixedly disposed on the sealing joint 223. Preferably, the wire interface 221, the wire conduit 222, and the sealing joint 223 are all made of hard metal, which is robust, wear-resistant, and corrosion-resistant. In use, the ball valve of this application is configured with the mounting groove 17 at the bottom, the rotary interface at the top, and the wire interface 221 located at the bottom of the valve body. Through the turning treatment of the wire conduit 222, the opening direction of the sealing joint 223 is changed to vertically upward.

[0050] In a preferred embodiment, the opening of the sealing joint 223 is positioned higher than the highest point of the cavity in the valve body 2. According to the principle of communicating vessels, this prevents the fluid medium flowing through the ball valve from overflowing from the opening of the wire sealing assembly 22. To enhance the sealing performance of the sealing joint 223, a conical inner cavity is provided at the opening of the sealing joint 223. The bottom of the conical inner cavity, with its larger geometric dimensions, is closer to the wire conduit 222, while the end with its smaller geometric dimensions is closer to the opening. When the ball 11 rotates within a 90° range within the valve body, the fluid medium will not enter the wire sealing assembly 22 when the pipe connection hole 112 and the pipe opening 21 are fully connected or fully closed. However, during the rotation, for a very short period when the pipe connection hole 112 and the pipe opening 21 are in a semi-connected state, a small amount of fluid medium may enter the wire sealing assembly 22. Firstly, due to the principle of communicating vessels, the fluid medium will not overflow from the opening of the sealing joint 223. Even if a slightly larger amount of fluid medium accumulates, when this fluid medium reaches the conical joint cavity within the sealing joint 223, the more fluid medium there is, the more it flows upward, and the greater the pressure on the fluid medium at this location. The pressure of the fluid medium at the opening of the sealing joint 223 is greater than the pressure on the fluid medium within the inner cavity 111 of the ball 11. This effectively reduces the possibility of fluid medium overflowing from the wire sealing assembly 22, thus improving the sealing performance of the ball valve.

[0051] like Figure 7 As shown, preferably, in a specific embodiment of this application, the ball valve includes multiple pipe connectors 3 respectively connected to each pipe port 21. Each pipe connector 3 includes a pipe heating unit 31 for heating the internal pipe of the pipe connector 3. A pipe heating wire 32 (not shown in the figure) of the pipe heating unit 31 extends from the outside of the pipe connector 3. When the pipe heating unit 31 is electrically heated, heat is transferred from the pipe heating unit 31 to the internal pipe, and then further dissipated into the fluid medium flowing through the internal pipe, making the temperature of the fluid medium higher than the ambient temperature, thus preventing substances in the fluid medium from precipitating into solids. This further prevents the precipitated substances from causing blockage of the ball valve, making valve operation difficult. The pipe heating wire 32 being located outside the pipe connector 3 also facilitates circuit maintenance and replacement.

[0052] Specifically, such as Figure 8 , Figure 9 , Figure 10 , Figure 11 and Figure 12As shown, the pipe connector 3 includes a valve body connector 33 and a pipe port connector 34 fixedly disposed with the valve body 2. The portion of the pipe port connector 34 connected to the valve body connector 33 is fixedly disposed in a manner that is geometrically compatible. When the valve body connector 33 and the pipe port connector 34 are screwed together, a cavity is formed to accommodate the pipe heating unit 31. The valve body connector 33 and the pipe port connector 34 fit tightly. Preferably, sealant is applied to the mating surface to reduce the influence of dirt in the air and various working gases on the pipe heating wire 32.

[0053] The pipeline heating unit 31 is housed between the valve body connecting seat 33 and the pipe port connecting seat 34.

[0054] In preferred cases, such as Figure 7 As shown, an annular groove structure 341 is provided on the outer surface of the pipe connection seat 34, and the inner surface has a conical structure. The end with the smaller geometric size faces the pipe direction, and the root with the larger geometric size faces the ball valve body direction. This arrangement makes the pressure of the fluid medium in the pipe slightly larger, and the pressure it experiences when flowing in the inner cavity 111 of the ball 11 becomes smaller, which is beneficial to the implementation of the repeated rotation action of the ball 11 during operation.

[0055] Specifically, an annular cavity 331 can be provided on the inner surface of the valve body connecting seat 33 for mounting the heating element 311 in the annular groove structure 341 and / or the annular cavity 331.

[0056] like Figure 6 As shown, the ball valve also includes an electric component 4 for controlling and rotating the ball 11.

[0057] In a preferred embodiment, the electric component 4 includes a motor 41 and an electric controller 42 that are electrically connected. The output end of the motor 41 is fixedly disposed with the rotary interface 16, and the electric controller 42 is used to control the operation of the motor 41.

[0058] The electrically controlled ball valve in this application consists of only a few parts, resulting in low manufacturing costs. It is small in size, lightweight, and has a small installation dimension. It requires low driving torque and is easy and quick to operate, requiring only a 90° rotation for rapid opening and closing. Furthermore, it possesses excellent flow regulation and sealing properties, avoiding the need for manual operation of traditional mechanical ball valves. Its simple structure and low maintenance costs are further enhanced by the design of three electric heating elements within the ball valve, allowing for smoother flow of the fluid medium. This ball valve offers greater versatility in its application environment and can be used in low-temperature environments. In low-temperature conditions, the heating and sealing structure of this ball valve ensures its normal operation.

[0059] It should also be noted that the various specific technical features described in the above embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, this application will not describe the various possible combinations separately.

[0060] Furthermore, various different embodiments of this application can be combined in any way, as long as they do not violate the spirit of this application, they should also be regarded as the content disclosed by this utility model.

Claims

1. A ball valve core, characterized in that, The ball valve core (1) includes a ball (11), the ball (11) having an inner cavity (111) and at least two pipe connection holes (112) communicating with the inner cavity (111). The ball valve core (1) includes a ball heating unit (12) for heating the inner cavity (111), and the wires (13) of the ball heating unit (12) are led out from the outside of the ball (11).

2. The ball valve core according to claim 1, characterized in that, The sphere (11) has a hollow structure, and the sphere heating unit (12) is installed on the part of the sphere (11) that forms the side wall of the inner cavity (111).

3. The ball valve core according to claim 2, characterized in that, The side wall portion of the sphere (11) is provided with a mounting groove (17), and the sphere heating unit (12) is accommodated in the mounting groove (17).

4. The ball valve core according to claim 3, characterized in that, The sphere (11) includes a spherical notch (14) and a spherical crown (15) that are joined together. The inner cavity (111) is located inside the spherical notch (14). The mounting groove (17) is provided on the mating surface of the spherical notch (14) and / or the spherical crown (15). The spherical crown (15) has a spherical crown through hole (151) at the center of rotation, and the wire (13) passes through the spherical crown through hole (151).

5. The ball valve core according to claim 4, characterized in that, The spherical heating unit (12) is fixedly disposed on the joint surface of the spherical notch (14). The spherical heating unit (12) includes a base (121) and an electric heating element (122) fixedly disposed on the base (121).

6. The ball valve core according to claim 5, characterized in that, The surface of the base (121) is provided with a plurality of symmetrical, concentric annular grooves, and the heating element (122) is housed in the annular grooves.

7. The ball valve core according to any one of claims 1-6, characterized in that, It also includes a wire sealing assembly (22) for accommodating the wire (13) and sealing the fluid passing through the ball valve.

8. The ball valve core according to claim 7, characterized in that, The wire sealing assembly (22) includes an internal air-connected wire interface (221), a wire conduit (222), and a sealing joint (223) connected in sequence. The wire interface (221) is fixedly installed on the valve body (2) and corresponds to the position of the ball crown through hole (151). The sealing joint (223) has a conical joint inner cavity.

9. The ball valve core according to claim 8, characterized in that, The ball valve core (1) has a rotating interface (16) which is located on the part of the ball (11) forming the side wall of the inner cavity (111) and is spaced apart from the surface of the inner cavity (111).

10. The ball valve core according to claim 9, characterized in that, The mounting slot (17) is set at a distance of 180 degrees from the rotating interface (16) and has the same mounting rotation axis A, which coincides with the working rotation axis B of the sphere (11).

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