阅读说明：本技术 一种具有稳定性且便于检修的阀门 (Valve with stability and easy access ) 是由 戴乃昌 于 2021-07-22 设计创作，主要内容包括：本发明提出了一种具有稳定性且便于检修的阀门,涉及阀门领域。包括：阀杆机构、阀体机构和检修机构,所述阀杆机构的固定部设于所述阀体机构,所述检修机构与所述阀体机构密封拆卸连接,所述检修机构密封设有透明件。本发明能够方便维护人员进行检测和维修,降低维护人员的工作量,提高维修效率。(The invention provides a valve with stability and convenient maintenance, and relates to the field of valves. The method comprises the following steps: the valve rod mechanism, the valve body mechanism and the maintenance mechanism, the fixed part of the valve rod mechanism is arranged on the valve body mechanism, the maintenance mechanism is connected with the valve body mechanism in a sealing and dismounting mode, and the maintenance mechanism is provided with a transparent piece in a sealing mode. The invention can facilitate the detection and maintenance of maintainers, reduce the workload of maintainers and improve the maintenance efficiency.)

1. The utility model provides a valve with stability and easy access, its characterized in that, includes valve rod mechanism, valve body mechanism and overhauls the mechanism, valve rod mechanism's fixed part is located valve body mechanism, overhaul the mechanism with valve body mechanism seal disassembly connects, it is equipped with the transparency to overhaul the mechanism seal.

2. The valve of claim 1, wherein the valve body mechanism comprises a closing member and a valve seat having an inner cavity, the closing member is slidably disposed in the inner cavity of the valve seat, and the fixed end of the closing member is detachably connected to the fixed portion of the valve rod mechanism.

3. A valve with stability and easy maintenance according to claim 2, characterized in that one side of the valve seat is provided with a first through opening communicating with the inner cavity, the opposite side of the valve seat is provided with a second through opening communicating with the inner cavity, the upper end of the valve seat is provided with a mounting hole connected with the valve rod mechanism, the inner cavity is provided with a partition layer, and the partition layer is provided with a flow opening cooperating with the closing component.

4. The valve of claim 3, wherein the closure assembly comprises a first connecting member, a first limiting member for limiting the first connecting member, and a closure member engaged with the flow port, the first limiting member is disposed in the mounting hole, one end of the first connecting member extends through the first limiting member and is detachably connected to the fixing portion of the valve stem mechanism, and the other end of the first connecting member is connected to the closure member.

5. A valve having stability and ease of service as claimed in claim 4, wherein the closure member is further provided with a first seal for sealing with the flow port.

6. The valve with stability and easy maintenance of claim 1, wherein the maintenance mechanism comprises a mounting seat, one side of the mounting seat is provided with a protruding member connected with the valve seat, the protruding member is provided with a second sealing member for sealing the mounting seat, and the transparent member is hermetically arranged on the mounting seat.

7. The valve of claim 4, wherein the valve stem mechanism comprises a cartridge, a valve stem assembly and a second limiting assembly for limiting the valve stem assembly, the cartridge is connected to the valve seat, the valve stem assembly is disposed in the middle of the cartridge, and one end of the valve stem assembly is connected to one end of the closing assembly.

8. The valve of claim 7, wherein the second stop assembly comprises a packing element circumferentially disposed between the valve stem assembly and the barrel and a second stop element disposed above the packing element.

9. The valve of claim 7, wherein the valve stem assembly comprises a valve stem, a rotating member and a third limiting member, the third limiting member is embedded in the barrel seat, the valve stem is provided with a first limiting groove engaged with the third limiting member, one end of the valve stem is connected to the rotating member, and the other end of the valve stem is provided with a second connecting member connected to the first connecting member.

10. The valve of claim 9, wherein the valve stem assembly further comprises a locking member, and the locking member is provided with a second limiting groove engaged with the valve stem.

Technical Field

The invention relates to the field of valves, in particular to a valve which is stable and convenient to overhaul.

Background

The valve is a control part in a fluid conveying system, has the functions of stopping, adjusting, guiding, preventing backflow, stabilizing pressure, shunting or overflowing and relieving pressure and the like, and needs to be checked and maintained regularly in the use process so as to ensure the stability and the safety of the conveying system, but the existing valve is inconvenient to overhaul, the workload of maintainers is increased, and the maintenance efficiency is reduced.

Disclosure of Invention

The invention aims to provide a valve which is stable and convenient to maintain, and can be conveniently detected and maintained by maintenance personnel, so that the workload of the maintenance personnel is reduced, and the maintenance efficiency is improved.

The embodiment of the invention is realized by the following steps:

the embodiment of the application provides a valve with stability and easy access, and it includes valve rod mechanism, valve body mechanism and overhauls the mechanism, and above-mentioned valve body mechanism is located to above-mentioned valve rod mechanism's fixed part, and above-mentioned maintenance mechanism is connected with the sealed dismantlement of above-mentioned valve body mechanism, and above-mentioned maintenance mechanism seals and is equipped with transparent.

In some embodiments of the present invention, the valve body mechanism includes a closing component and a valve seat having an inner cavity, the closing component is slidably disposed in the inner cavity of the valve seat, and a fixed end of the closing component is detachably connected to the fixed portion of the valve rod mechanism.

In some embodiments of the present invention, a first port is formed at one side of the valve seat to communicate with the inner chamber, a second port is formed at an opposite side of the valve seat to communicate with the inner chamber, a mounting hole is formed at an upper end of the valve seat to connect with the valve stem mechanism, the inner chamber is provided with a blocking layer, and the blocking layer is provided with a flow port to engage with the closure member.

In some embodiments of the present invention, the closing assembly includes a first connecting element, a first limiting element for limiting the first connecting element, and a closing element engaged with the flow opening, the first limiting element is disposed in the mounting hole, one end of the first connecting element penetrates through the first limiting element and is detachably connected to the fixing portion of the valve rod mechanism, and the other end of the first connecting element is connected to the closing element.

In some embodiments of the invention, the closure member further comprises a first seal member for sealing with the communication port.

In some embodiments of the present invention, the maintenance mechanism includes a mounting seat, a protruding member connected to the valve seat is disposed on one side of the mounting seat, a second sealing member for sealing the mounting seat is disposed on the protruding member, and the transparent member is hermetically disposed on the mounting seat.

In some embodiments of the present invention, the valve rod mechanism includes a cylinder base, a valve rod assembly and a second limiting assembly for limiting the valve rod assembly, the cylinder base is connected to the valve seat, the valve rod assembly is disposed in the middle of the cylinder base, and one end of the valve rod assembly is connected to one end of the closing assembly.

In some embodiments of the present invention, the second limiting component includes a packing member and a second limiting member, the packing member is circumferentially disposed between the valve rod component and the cylinder, and the second limiting member is disposed above the packing member.

In some embodiments of the present invention, the valve rod assembly includes a valve rod, a rotating member and a third limiting member, the third limiting member is embedded in the barrel base, the valve rod is provided with a first limiting groove matched with the third limiting member, one end of the valve rod is connected to the rotating member, and the other end of the valve rod is provided with a second connecting member connected to the first connecting member.

In some embodiments of the present invention, the valve stem assembly further includes a locking member, and the locking member is provided with a second limiting groove engaged with the valve stem.

Compared with the prior art, the embodiment of the invention has at least the following advantages or beneficial effects:

the valve body mechanism can be connected with a conveying pipeline, then the valve body mechanism is adjusted through the valve rod mechanism so as to control the conveying condition of fluid in the conveying pipeline, the maintenance mechanism is convenient for workers to maintain the valve body mechanism, in addition, the maintenance mechanism is connected with the valve body mechanism in a sealing and dismounting way, thus the whole sealing performance of the valve body mechanism can be ensured when in use, when in need of maintenance, the maintenance mechanism can be opened to maintain the interior of the valve body mechanism and replace parts and the like, the maintenance efficiency of the workers is improved, the maintenance mechanism is provided with a transparent piece in a sealing way, thus the maintainers can observe the condition of the interior of the valve body mechanism through the transparent piece conveniently, the detection is convenient, abnormal conditions can be found in time, the abnormal feedback time is shortened, and the inconvenience in detection of the existing valve is solved, inconvenient maintenance.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

FIG. 1 is a schematic structural diagram of a valve with stability and easy maintenance according to an embodiment of the present invention;

FIG. 2 is a cross-sectional view of a valve with stability and ease of servicing in an embodiment of the present invention;

FIG. 3 is a schematic structural diagram of a valve servicing mechanism with stability and easy servicing according to an embodiment of the present invention;

fig. 4 is an enlarged view of a portion a in fig. 2.

Icon: 1-valve seat, 101-lumen, 102-first through opening, 103-second through opening, 104-partition layer, 105-mounting hole, 2-first connecting piece, 3-first limiting piece, 4-closing piece, 5-first sealing piece, 6-mounting seat, 601-protrusion piece, 7-transparent piece, 8-second sealing piece, 9-cartridge seat, 10-second limiting piece, 11-packing piece, 12-valve rod, 13-rotating piece, 14-third limiting piece, 15-second connecting piece, and 16-locking piece.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the embodiments of the present invention, it should be noted that, if the terms "center", "upper", "lower", "left", "right", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that the products of the present invention are usually placed in when used, the terms are only used for convenience of description and simplification of the description, and do not indicate or imply that the devices or elements indicated must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

In the description of the embodiments of the present invention, it should be further noted that unless otherwise explicitly stated or limited, the terms "disposed," "mounted," "connected," and "connected" should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

Example 1

Referring to fig. 1 to 3, the present embodiment provides a valve with stability and easy maintenance, which includes a valve rod 12 mechanism, a valve body mechanism and a maintenance mechanism, wherein a fixing portion of the valve rod 12 mechanism is disposed on the valve body mechanism, the maintenance mechanism is detachably connected to the valve body mechanism in a sealing manner, and the maintenance mechanism is provided with a transparent member 7 in a sealing manner.

In this embodiment, valve body mechanism is located to the fixed part of valve rod 12 mechanism, can be in the same place valve rod 12 mechanism and valve body mechanism fixed connection to improve the holistic stability of valve, can link together with pipeline through valve body mechanism in addition, then adjust valve body mechanism through valve rod 12 mechanism, so that the fluidic circulation rate and the flow size of control pipeline in.

In addition, the maintenance mechanism is connected with the valve body mechanism in a sealing and dismounting manner, so when the valve body mechanism is used, the whole sealing performance of the valve body mechanism can be ensured, when maintenance is needed, the maintenance mechanism can be opened to maintain the inside of the valve body mechanism and replace parts and the like, the maintenance efficiency of workers is improved, the maintenance mechanism is provided with the transparent part 7 in a sealing manner, the maintenance personnel can observe the inside situation of the valve body mechanism through the transparent part 7 conveniently, the detection is convenient, the abnormal situation can be found in time, the abnormal feedback time is shortened, the problems that the existing valve is inconvenient to detect and inconvenient to maintain are solved.

When using, be in the same place valve body mechanism and pipeline fixed mounting, then adjust valve body mechanism through valve rod 12 mechanism, adjust the fluidic flow rate of pipeline, flow size etc. maintainer is examining the valve, can observe the inside situation of valve body mechanism through transparent 7, when valve body mechanism goes wrong, can maintain and change spare part inside the valve body mechanism through overhauing the mechanism, conveniently detect and maintain.

In some embodiments of this embodiment, the transparent member 7 may be transparent organic glass.

In the above embodiment, adopt transparent organic glass to be convenient for maintainer to watch the inside of valve body mechanism, and transparent organic glass manufacturing process is ripe, and the quality is reliable, and use cost is low.

Example 2

Referring to fig. 1-2, in this embodiment, on the basis of embodiment 1, a valve with stability and easy maintenance is provided, which is different from embodiment 1 in that: the valve body mechanism comprises a closing component and a valve seat 1 with an inner cavity 101, the closing component is arranged in the inner cavity 101 of the valve seat 1 in a sliding mode, and the fixed end of the closing component is detachably connected with the fixed portion of the valve rod 12 mechanism.

In this embodiment, be equipped with inner chamber 101 in the disk seat 1, be convenient for the fluid flows in inner chamber 101, then flow rate and the flow size of the fluid are adjusted through the closing component, improve the controllability of valve, facilitate the use, the stiff end of closing component and the fixed part releasable connection of valve rod 12 mechanism, can drive the closing component motion through valve rod 12 mechanism on the one hand, play regulatory function, on the other hand is convenient for dismantle valve rod 12 mechanism and closing component, the maintainer of being convenient for maintains the valve like this, structural design is ingenious, high durability and convenient use.

Example 3

Referring to fig. 1-2, the present embodiment provides a valve with stability and easy maintenance based on any of the above embodiments, which is different from any of the above embodiments in that: a first through hole 102 communicating with the inner cavity 101 is formed at one side of the valve seat 1, a second through hole 103 communicating with the inner cavity 101 is formed at the opposite side of the valve seat 1, a mounting hole 105 for mechanical connection with the valve stem 12 is formed at the upper end of the valve seat 1, a blocking layer 104 is formed in the inner cavity 101, and a flow hole for cooperation with the closing member is formed in the blocking layer 104.

In this embodiment, first opening 102 can make the fluid in the pipeline enter into the inner chamber 101 in the disk seat 1, second opening 103 can make the fluid that gets into in the inner chamber 101 flow, in order to reach the fluid transport function, disk seat 1 upper end is equipped with mounting hole 105, be convenient for install valve rod 12 mechanism, in order to control valve body mechanism work through valve rod 12 mechanism, be equipped with partition layer 104 in the inner chamber 101, can be used for cutting off the fluid, and then reach the cutout, adjust the function etc., be equipped with the circulation mouth on partition layer 104, can make the fluid flow out through the circulation mouth, then discharge through second opening 103, outflow and the cooperation of closing component in addition, can control the opening and shutting degree of opening and shutting of flow through the closing component.

Example 4

Referring to fig. 1, fig. 2 and fig. 4, the present embodiment provides a valve with stability and easy maintenance based on any of the above embodiments, and the difference between the valve and any of the above embodiments is: the closing assembly comprises a first connecting piece 2, a first limiting piece 3 used for limiting the first connecting piece 2 and a closing piece 4 matched with the circulation port, the first limiting piece 3 is arranged in the mounting hole 105, one end of the first connecting piece 2 penetrates through the first limiting piece 3 and is detachably connected with the fixing portion of the valve rod 12 mechanism, and the other end of the first connecting piece 2 is connected with the closing piece 4.

In this embodiment, first locating part 3 is located in mounting hole 105, can play sealed effect on the one hand, prevent that the fluid in the inner chamber 101 of disk seat 1 from spilling over from mounting hole 105, guarantee the leakproofness of valve body mechanism, on the other hand can carry out spacing support to first connecting piece 2, make first connecting piece 2 up-and-down motion stable, the precision is high, in addition first connecting piece 2 plays connected effect, the fixed part releasable connection of its one end and valve rod 12 mechanism, be convenient for dismantle the maintenance, the other end is connected with closure member 4, can drive closure member 4 up-and-down motion, thereby control the degree of opening and shutting between closure member 4 and the circulation mouth, so that adjust the fluid, it is convenient adjustable to use more.

Example 5

Referring to fig. 2 and 4, the present embodiment provides a valve with stability and easy maintenance based on any of the above embodiments, which is different from any of the above embodiments in that: the closing member 4 is further provided with a first sealing member 5 for sealing the communication port.

In this embodiment, the first sealing member 5 is disposed on the closing member 4, so that the sealing property between the closing member 4 and the flow opening can be improved, the fluid is prevented from flowing out from the flow opening, and the closing effect of the valve is improved.

Example 6

Referring to fig. 1 and fig. 3, the present embodiment provides a valve with stability and easy maintenance based on any of the above embodiments, which is different from any of the above embodiments in that: the maintenance mechanism comprises an installation seat 6, a protruding part 601 connected with the valve seat 1 is arranged on one side of the installation seat 6, a second sealing part 8 used for sealing the installation seat 6 is arranged on the protruding part 601, and the transparent part 7 is arranged on the installation seat 6 in a sealing mode.

In this embodiment, mount pad 6 one side is equipped with protruding piece 601, can make mount pad 6 closely cooperate with disk seat 1 through protruding piece 601, easy to assemble, second sealing member 8 is located on protruding piece 601, can increase the sealing nature of being connected between protruding piece 601 and the disk seat 1, thereby can make mount pad 6 and disk seat 1 sealing connection, prevent to reveal, mount pad 6 is located to transparency 7 is sealed, make transparency 7 and mount pad 6 can sealing connection, improve the holistic leakproofness of maintenance mechanism, be convenient for maintainer through transparency 7 and observe the inside situation of disk seat 1, the convenient detection.

During the use, aim at disk seat 1 with one side of bellying 601 on mount pad 6, then through bellying 601 with mount pad 6 and disk seat 1 sealing connection together, when the staff is examining like this, can see through the inside situation that transparent 7 observed disk seat 1, convenient detection, when the valve appears unusual needs to be maintained, can dismantle mount pad 6, and then can maintain and protect more the inside spare part of disk seat 1.

Example 7

Referring to fig. 1-2, the present embodiment provides a valve with stability and easy maintenance based on any of the above embodiments, which is different from any of the above embodiments in that: the valve rod 12 mechanism comprises a cylinder base 9, a valve rod 12 assembly and a second limiting assembly for limiting the valve rod 12 assembly, the cylinder base 9 is connected with the valve seat 1, the valve rod 12 assembly is arranged in the middle of the cylinder base 9, and one end of the valve rod 12 assembly is connected with one end of the closing assembly.

In this embodiment, the bobbin base 9 can provide the support protection for the spacing subassembly of valve rod 12 subassembly and second, and the middle part in the bobbin base 9 is located to the valve rod 12 subassembly, can carry out spacing support to the valve rod 12 subassembly through the spacing subassembly of second, makes the valve rod 12 subassembly can be stable in the up-and-down motion in the bobbin base 9, and the one end of valve rod 12 subassembly is connected with the one end of closing assembly, can drive closing assembly up-and-down motion together, and then the situation of opening and close of control flap, excellent in use effect.

Example 8

Referring to fig. 2, the present embodiment provides a valve with stability and easy maintenance based on any of the above embodiments, and the difference between the present embodiment and any of the above embodiments is: the second limiting component comprises a packing element 11 and a second limiting element 10, the packing element 11 is arranged between the valve rod 12 component and the cylinder body along the circumferential direction, and the second limiting element 10 is arranged above the packing element 11.

In this embodiment, the spacing subassembly of second includes packing 11 and second locating part 10, wherein packing 11 can seal protection to valve rod 12 subassembly, prevent fluid in the disk seat 1 on the one hand, moisture etc. from gushing out, avoid corroding the valve, on the other hand also can prevent that external environment's moisture etc. from getting into in the valve body, cause the harm to the valve body is inside, can assist the support to valve rod 12 subassembly through second locating part 10, it is more stable to make valve rod 12 subassembly up-and-down motion, it is high to remove the precision.

Example 9

Referring to fig. 1-2, the present embodiment provides a valve with stability and easy maintenance based on any of the above embodiments, which is different from any of the above embodiments in that: the valve rod 12 assembly comprises a valve rod 12, a rotating member 13 and a third limiting member 14, the third limiting member 14 is embedded in the cylinder base 9, a first limiting groove matched with the third limiting member 14 is formed in the valve rod 12, one end of the valve rod 12 is connected with the rotating member 13, and a second connecting member 15 connected with the first connecting member 2 is arranged at the other end of the valve rod 12.

In this embodiment, the third limiting member 14 is embedded in the barrel base 9, and the barrel base 9 provides a stable support for the third limiting member 14, so that the third limiting member 14 can limit the position of the valve rod 12, and in addition, the valve rod 12 is provided with a first limiting groove matched with the third limiting member 14, and through the matching between the first limiting groove and the third limiting member 14, the valve rod 12 can rotate along the third limiting member 14, thereby achieving the function of moving up and down.

In addition, the one end of valve rod 12 is connected with rotation piece 13, can drive valve rod 12 through rotation piece 13 and rotate, then rotate through valve rod 12, make valve rod 12 can reciprocate, the other end of valve rod 12 is equipped with second connecting piece 15, can link together valve rod 12 with first connecting piece 2 through second connecting piece 15, on the one hand, can reach the effect of quick installation dismantlement, convenient maintenance, on the other hand, connect the rotation that can not influence valve rod 12 through second connecting piece 15, valve rod 12 only can drive first connecting piece 2 up-and-down motion when rotating and reciprocating like this, and do not make first connecting piece 2 rotate with valve rod 12 together, can reduce the wearing and tearing volume between closing assembly and the valve body mechanism like this, and service life is prolonged.

In some embodiments of the present invention, the third limiting member 14 may be a threaded sleeve.

In the above embodiment, by adopting the threaded sleeve, the valve rod 12 can be rotated along the threaded sleeve, so that the up-down lifting function is realized, the structure is simple, and the adjustment is convenient.

In some embodiments of the present invention, the rotating member 13 may be a rotating wheel.

In the above embodiment, the rotating wheel is adopted to facilitate the operation of personnel, so as to drive the valve rod 12 to rotate, the operation is simple and convenient, and the time and the labor are saved.

Example 10

Referring to fig. 1-2, the present embodiment provides a valve with stability and easy maintenance based on any of the above embodiments, which is different from any of the above embodiments in that: the valve stem 12 assembly further comprises a locking member 16, and a second limiting groove matched with the valve stem 12 is formed in the locking member 16.

In this embodiment, locking piece 16 can be used for carrying out spacing locking to valve rod 12, makes valve rod 12 can maintain current regulation situation, guarantees the stability that fluid flows, is equipped with on locking piece 16 with valve rod 12 complex second spacing groove, and locking piece 16 of being convenient for rotates along valve rod 12 to reciprocate, can fix valve rod 12 optional position, fixed effectual.

In some embodiments of this embodiment, the locking member 16 may be a lock nut.

In the embodiment, the locking nut is adopted, the existing mature technology is adopted, the manufacturing is simple and convenient, the replaceability is strong, the replacement is convenient, and the use cost is reduced.

In summary, embodiments of the present invention provide a valve with stability and easy maintenance, by providing a valve rod 12 mechanism, a valve body mechanism and a maintenance mechanism, the valve body mechanism can be connected to a conveying pipeline, then the valve body mechanism is adjusted by the valve rod 12 mechanism to control the conveying condition of fluid in the conveying pipeline, the maintenance mechanism is convenient for a worker to perform maintenance on the valve body mechanism, and in addition, the maintenance mechanism is connected with the valve body mechanism in a sealing and disassembling manner, so that when in use, the sealing performance of the valve body mechanism can be ensured, when maintenance is needed, the maintenance mechanism can be opened to perform maintenance and part replacement on the inside of the valve body mechanism, the maintenance efficiency of the worker is improved, the maintenance mechanism is provided with a transparent member 7 in a sealing manner, so that the maintenance worker can observe the condition inside of the valve body mechanism through the transparent member 7, thereby facilitating detection and finding abnormal conditions in time, shorten unusual feedback time, solved current valve and detected inconveniently, maintained inconvenient problem.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.