Internally mounted multi-port ball valve

Abstract

The utility model discloses an inner -built multi -ball valve relates to valve field, including valve body, a plurality of valve seat, valve core and valve rod, the valve core upper end is linked with valve rod, the valve core lower extreme is equipped with the rotating joint core shaft with valve body, be equipped with a plurality of first passageway mouth and be used for the second passageway mouth of the valve core and valve seat dismounting in and out to valve body, the valve body is equipped with the integrated valve rod mounting seat in the position of installing valve rod and is equipped with the integrated core shaft mounting seat in the position of installing core shaft, the coaxality of core shaft mounting seat and valve rod mounting seat is consistent, the coaxality of valve rod, valve core and core shaft is consistent. The utility model has the advantages of good coaxality, low processing cost, convenient to assemble and disassemble.

Description

Technical Field

[0001] This utility model relates to the field of valves, specifically to an internally mounted multi-way ball valve. Background Technology

[0002] In the existing technology, three-way / four-way valves are generally externally mounted, with the valve stem mounting seat and valve body being separate structures. After the valve core, valve stem and spindle are installed, the coaxiality between the three cannot be guaranteed, which greatly affects the reliability of valve operation. Furthermore, the valve seat is mounted on the valve body via bolts and a pressure plate. After prolonged operation, the medium can enter the gap between the bolts and the pressure plate, making disassembly impossible, which is extremely inconvenient and increases processing costs. Moreover, there are generally two methods for installing the valve body: one is to install the valve core first, followed by the valve seat; the other is to install the valve core first, then install the valve seat onto the flange structure and weld it to the valve body. The first method, using bolts for tight fixing, is prone to thread rust, deformation, and solidification of foreign matter over long-term use, making the bolts impossible to remove. This results in the valve being unable to be disassembled and maintained. The second method, using welding, is even more impossible to disassemble; attempting to disassemble it would directly damage the valve body. Utility Model Content

[0003] To overcome the shortcomings of the prior art, this utility model provides an internal multi-way ball valve with good coaxiality, low processing cost, and convenient disassembly and assembly.

[0004] The technical solution adopted by this utility model is as follows: An internal multi-way ball valve includes a valve body, several valve seats, a valve core, and a valve stem. The upper end of the valve core is linked to the valve stem, and the lower end of the valve core is rotatably connected to the valve body. The valve body is provided with several first channel ports and second channel ports for disassembling and assembling the valve core and valve seats. The valve body is provided with an integrally formed valve stem mounting seat at the position for valve stem installation and an integrally formed mandrel mounting seat at the position for mandrel installation. The coaxiality between the mandrel mounting seat and the valve stem mounting seat is consistent, and the coaxiality of the valve stem, valve core, and mandrel is consistent.

[0005] The valve seat is installed at each of the first channel ports in the valve body. The first channel port is provided with a stepped surface for the valve seat to be installed. The valve core and the valve seat are in a floating sealing fit. A sealing ring is provided between the valve seat and the valve body.

[0006] An elastic element is also provided between the valve seat and the valve body to elastically abut against each other, and the elastic element is a wave-shaped steel wire spring.

[0007] The diameter of the second channel opening is larger than the outer diameter of the valve core and valve seat.

[0008] The mandrel mounting base is provided with a cover, and the valve stem mounting base is provided with packing and a packing cover.

[0009] The valve body is a three-way valve body, and a cover plate for sealing is provided at the second channel opening.

[0010] The valve body is a four-way valve body, and a flange for sealing installation is provided at the second channel port.

[0011] A second valve seat with a floating sealing fit is provided between the valve core and the flange.

[0012] The valve core is provided with partitions along a diagonal direction.

[0013] The beneficial effects of this utility model are: by integrally molding the valve stem mounting seat and the spindle mounting seat with the valve body, this technical solution can ensure the coaxiality of the valve core, valve stem and spindle, thus ensuring the reliability of the valve operation. In addition, by installing the valve seat in the one-piece molded valve body, the structure of the pressure plate and bolts is eliminated, which greatly reduces the processing cost. Furthermore, the valve core and valve seat can be disassembled and assembled from the second channel port during disassembly and assembly, which greatly reduces the difficulty of disassembly and assembly. Attached Figure Description Figure 1 This is a schematic diagram of the internal multi-way ball valve of Embodiment 2 of this utility model.

[0014] Figure 2 This is a cross-sectional view of Example 2.

[0015] Figure 3 This is a schematic diagram of the structure of Embodiment 1.

[0016] Figure 4 This is a schematic diagram of the valve seat structure. Detailed Implementation

[0017] The embodiments of this utility model will be further described below with reference to the accompanying drawings: As shown in the figure, an internal multi-way ball valve includes a valve body 1, several valve seats 2, a valve core 3, and a valve stem 4. The upper end of the valve core 3 is linked to the valve stem 4, and the lower end of the valve core 3 is rotatably connected to the valve body 1 via a spindle 12. The valve body 1 has several first channel ports 6 and second channel ports 16 for disassembling and assembling the valve core 3 and valve seats. The valve body 1 has an integrally formed valve stem mounting seat 18 at the position for mounting the valve stem 4 and an integrally formed spindle mounting seat 19 at the position for mounting the spindle 12. The coaxiality between the spindle mounting seat 19 and the valve stem mounting seat 18 is consistent, as are the coaxiality of the valve stem 4, valve core 3, and spindle 12. This technical solution ensures the coaxiality of the valve core, valve stem, and spindle by integrally forming the valve stem mounting seat and the spindle mounting seat with the valve body, thus guaranteeing the reliability of the valve. In addition, the valve core and valve seats can be disassembled and assembled through the second channel ports, greatly reducing the difficulty of disassembly and assembly.

[0018] The valve seat 2 is installed at each of the first channel ports 6 inside the valve body 1. The first channel port 6 is provided with a stepped surface 15 for the valve seat 2 to be installed. The valve core 3 is in floating sealing fit with the valve seat 2. A sealing ring 7 is provided between the valve seat and the valve body. By installing the valve seat in the integrally formed valve body, the structure of the pressure plate and bolts is eliminated, which greatly reduces the processing cost and has the advantage of good sealing performance.

[0019] An elastic element 8 is also provided between the valve seat 2 and the valve body 1 to elastically abut against each other. The elastic element 8 is a wave-shaped steel wire spring. The use of a wave-shaped steel wire spring to replace the traditional cylindrical spring and wave spring achieves a significant reduction in material usage, structural complexity, and horizontal space occupied by the valve seat under the same thrust requirement. Compared with the traditional helical spring, the wave-shaped spring can provide the same required preload and compensation capacity in a smaller space. The wave-shaped steel wire spring occupies less lateral space than the wave spring, allowing the valve body and valve seat to be made smaller.

[0020] The innovative advantages of wave-shaped steel wire springs are mainly reflected in four aspects: 1. First, its special wave-shaped structure allows the spring to reduce the space width requirement under the same thrust demand; 2. Secondly, the wave-shaped steel wire spring does not require corresponding mounting cylindrical grooves to be cut on the internal valve seat or valve body. For cylindrical springs, the depth of the mounting cylindrical groove directly determines the amount of spring deformation and the position of spring thrust. Therefore, if you want the thrust behind the valve seat to be consistent or similar, you need to control the cost above and below these mounting cylindrical grooves. 3. Furthermore, the number of cylindrical springs used as elastic elements is necessarily greater than that of wave springs, which will increase the cost of product procurement management and quality inspection. 4. Furthermore, corrugated wire springs have a wider range of applications compared to disc springs. The greater the difference between their inner and outer diameters, the more difficult it is to manufacture them, and they cannot be directly used in the design of large-diameter valves. 5. Furthermore, compared to wave-shaped wire springs, traditional square-section wave springs have a wider cross-section, requiring a larger mating surface between the valve seat and valve body, which increases unnecessary material costs. For the same width, wave-shaped wire springs have stronger bending resistance than wave springs. 6. Finally, the manufacturing process of wave springs is relatively simple, requiring no complex winding, which reduces production costs.

[0021] The diameter of the second channel port 16 is larger than the outer diameter of the valve core 3 and the valve seat 2.

[0022] The spindle mounting base 19 is provided with a cover 14, and the valve stem mounting base 18 is provided with packing 20 and packing cover 21. When disassembling and assembling, first remove the packing cover and pull the valve stem out of the valve core, then remove the spindle from the spindle mounting base, and then disassemble the valve core and valve seat from the second channel opening. It has the advantage of convenient disassembly and assembly.

[0023] This technical solution has two embodiments; Example 1: The valve body 1 is a three-way valve body 1. A cover plate 9 for sealing is provided at the second channel port 16. The cover plate is fixed by bolts. When disassembling and assembling the valve core, the cover plate needs to be removed first.

[0024] Example 2: The valve body 1 is a four-way valve body 1, and a flange 10 for sealing installation is provided at the second channel port 16. A second valve seat 17 with floating sealing cooperation is provided between the valve core 3 and the flange 10. The valve core 3 is provided with a partition 11 along the diagonal direction. The present invention also provides an installation method for an internal multi-way ball valve, which is used for the above-mentioned internal multi-way ball valve, the steps of which include: Step 1: Install a wave-shaped steel wire spring and valve seat in the valve body through the second channel port, and use a clamp to fix the position of the valve seat and put the valve seat in an elastic warning state; Step 2: Place the valve core horizontally into the second channel opening, insert it into the valve body, and then rotate the valve core. Step 3: Insert the valve stem into the valve stem mounting seat and connect it to the valve core; insert the mandrel into the mandrel mounting seat and connect it to the valve core. By combining a "clamp / tool ​​pre-tightening valve seat + horizontal valve core + valve core rotation installation" process, the valve assembly process is simplified and efficiency is improved, and internally mounted multi-way ball valves can be installed without welding. This installation method solves the problem that the integrated valve body of three-way / four-way internally mounted resilient valve seats cannot accommodate valve cores.

[0025] In the description of this utility model, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0026] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" 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 components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. Furthermore, in the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0027] Please note to all technical personnel: Although this utility model has been described according to the specific embodiments above, the inventive concept of this utility model is not limited to this utility model. Any modifications that utilize the inventive concept will be included within the scope of protection of this patent.

Claims

1. An internal multi-way ball valve, comprising a valve body (1), several valve seats (2), a valve core (3), and a valve stem (4), wherein the upper end of the valve core (3) is linked to the valve stem (4), and a spindle (12) is provided between the lower end of the valve core (3) and the valve body (1) for rotatable connection, characterized in that: The valve body (1) is provided with a plurality of first channel ports (6) and a second channel port (16) for the valve core (3) and valve seat to be disassembled and installed. The valve body (1) is provided with an integrally formed valve stem mounting seat (18) at the position for the valve stem (4) to be installed and an integrally formed spindle mounting seat (19) at the position for the spindle (12) to be installed. The coaxiality between the spindle mounting seat (19) and the valve stem mounting seat (18) is consistent. The coaxiality of the valve stem (4), valve core (3) and spindle (12) is consistent.

2. The internal multi-way ball valve according to claim 1, characterized in that: The valve seat (2) is installed at each of the first channel ports (6) inside the valve body (1). The first channel port (6) is provided with a stepped surface (15) for the valve seat (2) to be installed. The valve core (3) is in floating sealing cooperation with the valve seat (2). A sealing ring (7) is provided between the valve seat and the valve body.

3. The internal multi-way ball valve according to claim 2, characterized in that: An elastic element (8) is provided between the valve seat (2) and the valve body (1) to elastically abut against each other. The elastic element (8) is a wave-shaped steel wire spring.

4. The internal multi-way ball valve according to claim 1, characterized in that: The diameter of the second channel opening (16) is larger than the outer diameter of the valve core (3) and the valve seat (2).

5. The internal multi-way ball valve according to claim 1, characterized in that: The spindle mounting base (19) is provided with a cover (14), and the valve stem mounting base (18) is provided with a packing (20) and a packing cover (21).

6. The internal multi-way ball valve according to any one of claims 1-5, characterized in that: The valve body (1) is a three-way valve body (1), and a cover plate (9) for sealing is provided at the second channel opening (16).

7. The internal multi-way ball valve according to any one of claims 1-5, characterized in that: The valve body (1) is a four-way valve body (1), and a flange (10) for sealing installation is provided at the second channel port (16).

8. The internal multi-way ball valve according to claim 7, characterized in that: A second valve seat (17) with a floating seal fit is provided between the valve core (3) and the flange (10).

9. The internal multi-way ball valve according to claim 1, characterized in that: The valve core (3) is provided with a partition (11) along the diagonal direction.

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