Metal sealing butterfly valve

Abstract

The utility model relates to a metal sealing butterfly valve which comprises a valve body, a valve rod and a valve plate, and the valve rod is detachably connected with the valve body. The valve plate is limited in the connecting process of the valve rod and the valve body, and the valve rod and the valve plate are in transmission fit. By means of the combination relation between the valve rod and the valve plate, when the valve rod is installed on the valve body, the valve plate can be directly limited in the valve body, movement of the valve plate can be achieved through the transmission effect, and therefore installation of the valve plate is completed, and conversely, after the valve rod is detached, the valve plate can be directly taken down so that the valve plate can be conveniently replaced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to valve technical field, concretely is a metal seal butterfly valve. BACKGROUND

[0002] The metal seal butterfly valve is mainly applied to metallurgy, electricity, petroleum chemical industry and industrial pipeline of water supply and drainage and municipal construction, but due to the pressure of some fluid medium and the corrosion of the medium itself, the sealing between the valve core and the valve body is reduced after long-time pressure bearing or corrosion, so the valve plate usually needs to be replaced.

[0003] In the prior art, the valve rod is rotatably arranged on the valve body, and it is difficult to disassemble the valve rod from the valve body, and the valve plate is arranged on the valve rod by bolt connection, so when the valve plate is replaced alone, the tool needs to be inserted into the valve body to disassemble the bolt between the valve plate and the valve rod, which is complicated, especially for the butterfly valve with small diameter, the tool is difficult to operate in the valve body. SUMMARY

[0004] This section aims to outline some aspects of the embodiments of the utility model and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the abstract of the specification and the utility model name to avoid obscuring the purpose of this section, the abstract of the specification and the utility model name, and such simplifications or omissions cannot be used to limit the scope of the utility model.

[0005] To solve the problems in the background art, the utility model provides the following technical scheme:

[0006] A metal seal butterfly valve, comprising a valve body, a valve rod and a valve plate, wherein:

[0007] The valve rod is configured to be detachably connected with the valve body;

[0008] The valve rod is connected with the valve body to limit the valve plate, and the valve rod and the valve plate are in transmission cooperation.

[0009] As a preferred technical scheme of the metal seal butterfly valve, the valve rod and the valve plate are inserted and matched on the side.

[0010] As a preferred technical scheme of the metal seal butterfly valve, the valve rod comprises an upper rod body and a lower rod body, both of which are detachably connected with the valve body, and the upper rod body and the lower rod body are respectively inserted and matched with the valve plate on different sides.

[0011] As a preferred technical scheme of the metal seal butterfly valve, the upper rod body is rotatably arranged on the valve body and is in spline cooperation with the valve plate.

[0012] The lower rod body is fixedly arranged on the valve body.

[0013] The upper rod body is rotatably connected with the fixed seat, and the lower rod body is fixedly connected with the fixed seat.

[0014] The fixed seat is connected with the valve body through a bolt assembly.

[0015] The fixed seat is connected with the valve body through a bolt assembly.

[0016] The upper rod body is rotatably connected with the fixed seat, and the lower rod body is fixedly connected with the fixed seat.

[0017] The upper rod body is rotatably connected with the fixed seat, and the lower rod body is fixedly connected with the fixed seat.

[0018] The metal seal butterfly valve has the beneficial effects that: through the combination relationship between the valve rod and the valve plate, when the valve rod is installed on the valve body, the valve plate can be directly limited in the valve body, and the activity of the valve plate can be realized through the transmission effect, so that the installation of the valve plate is completed, and vice versa, when the valve rod is removed, the valve plate can be directly taken down, so that it is convenient to replace. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical scheme of the embodiments of the present application, the drawings required to be used in the embodiment description will be briefly introduced as follows, and obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative labor. Among them:

[0020] Figure 1 It is a perspective view of one of the embodiments of the present application.

[0021] Figure 2 It is another view of Figure 1 .

[0022] Figure 3 It is a split view of Figure 1 .

[0023] Figure 4 It is a split view of Figure 1 .

[0024] Figure 5 is a sectional view of the valve. Figure 4

[0025] Figure 6 is a sectional view of the valve. Figure 4

[0026] Label: 1, valve body; 2, valve plate; 3, valve stem; 301, upper stem body; 302, lower stem body; 4, fixed seat; 5, installation; 6, first sealing element; 7, second sealing element; 8, support edge. DETAILED DESCRIPTION

[0027] In order to make the above-mentioned purposes, features and advantages of the utility model more apparent, comprehensible and easy to understand, the specific embodiments of the utility model will be described in detail below in conjunction with the drawings of the specification.

[0028] In the following description, a lot of specific details are set forth in order to facilitate a thorough understanding of the utility model, but the utility model can also be implemented in other ways different from those described herein, and those skilled in the art can make similar generalizations without departing from the connotation of the utility model, therefore the utility model is not limited by the specific embodiments disclosed below.

[0029] Secondly, the "one embodiment" or "embodiment" referred to herein can include specific features, structures or characteristics in at least one implementation of the utility model. In this specification, "in one embodiment" does not mean the same embodiment, nor is it an independent or alternative embodiment that excludes other embodiments.

[0030] Thirdly, the utility model is described in detail in conjunction with the schematic diagram, and in the detailed description of the embodiments of the utility model, for the convenience of description, the sectional view of the device structure will be partially enlarged without the general proportion, and the schematic diagram is only an example, which should not limit the scope of protection of the utility model herein. In addition, three-dimensional spatial dimensions including length, width and depth should be included in actual production.

[0031] Referring to Figures 1-5 , one embodiment of the utility model provides a metal seal butterfly valve, which comprises a valve body 1, a valve stem 3 and a valve plate 2, and:

[0032] The valve stem 3 is rotationally arranged on the valve body 1 and can be freely disassembled on the valve body 1;

[0033] ​​When the valve stem 3 is completely connected to the valve body 1, the valve plate 2 can be limited in the valve body 1, and the transmission effect between the valve stem 3 and the valve plate 2 is maintained to realize the control of the valve stem 3 on the valve plate 2, so that the installation effect of the valve plate 2 is completed, and vice versa, when the valve stem 3 is removed from the valve body 1, the limitation on the valve plate 2 is released, so that the disassembly of the valve plate 2 can be realized.

[0034] Based on the above, when the disassembly and assembly of the valve plate 2 are required, only the disassembly and assembly process of the valve stem 3 needs to be operated, so that the operation can be performed outside the valve body 1, and compared with the prior art, the process is simpler and more convenient and easy to operate.

[0035] Regarding the limiting mode of the valve stem 3 on the valve plate 2, specifically, refer to Figures 3-5 The valve stem 3 is inserted and matched with the peripheral side of the valve plate 2, when the insertion and matching between the two are completed, the axial movement of the valve plate 2 relative to the valve body 1 cannot be performed, so that the limitation on the valve plate 2 is realized, and the rotation of the valve plate 2 can still be driven by the rotation of the valve stem 3.

[0036] Further, refer to Figures 3-5 The valve stem 3 includes an upper stem body 301 and a lower stem body 302 which are detachably connected with the valve body 1, the upper stem body 301 and the lower stem body 302 are respectively inserted and matched with two different positions of the peripheral side of the valve plate 2, and through the insertion and matching of the two positions, the valve plate 2 can also be limited in the extension direction of the peripheral side of the valve body 1, so that the stability of the installation process of the valve plate 2 is further ensured; here, at least the upper stem body 301 is rotatably arranged on the valve body 1 and forms a transmission with the valve plate 2, so that the rotation of the valve plate 2 can be controlled, specifically, the upper stem body 301 and the valve plate 2 can be in spline matching mode, so that the transmission effect between the two is achieved while the insertion effect is achieved.

[0037] Therefore, in order to further increase the stability of the installation process of the valve plate 2, the lower stem body 302 can be arranged to be fixed on the valve body 1, and the end portion of the lower stem body 302 is in a columnar structure, so that the lower stem body 302 is in a rotating relationship with the valve plate 2 during the insertion process of the valve plate 2, so that the rotation process of the valve plate 2 is not hindered.

[0038] Further, refer to Figures 1-5, regarding the dismounting mode of the upper rod body 301 and the lower rod body 302 on the valve body 1, specifically, the utility model also includes fixed seat 4, and at least two, thereby corresponding to the upper rod body 301 and the lower rod body 302 respectively, two fixed seat 4 and two different places on the valve body 1 are detachably connected, such as fixed seat 4 can adopt the mode of bolt connection and is fixedly connected with the valve body 1, the upper rod body 301 is rotationally fitted with fixed seat 4, and the lower rod body 302 is fixedly connected with fixed seat 4, so that when fixed seat 4 is installed on the valve body 1, the rotatable effect of the upper rod body 301 on the valve body 1 and the fixed effect of the lower rod body 302 on the valve body 1 are satisfied.

[0039] Further, referring to Figure 3 To ensure the position accuracy of fixed seat 4 during installation on the valve body 1 by bolts, an installation place 5 is further arranged on the valve body 1, the fixed seat 4 is in alignment fitting relationship with the installation place 5, and a first sealing member 6 is abutted between the fixed seat 4 and the installation place 5, so as to ensure the sealing property of the connection between the fixed seat 4 and the valve body 1, regarding the alignment fitting mode, such as the installation place 5 can be designed in a groove shape and consistent with the shape of the fixed seat 4, so as to facilitate the positioning of the fixed seat 4 on the valve body 1, the first sealing member 6 can be a sealing gasket, which is extruded between the groove bottom of the fixed seat 4 and the installation place 5, so as to ensure the sealing effect of the connection between the fixed seat 4 and the valve body 1.

[0040] Further, referring to Figure 6 To ensure the sealing property of the rotating connection between the upper rod body 301 and the fixed seat 4, a second sealing member 7 can also be abutted between the upper rod body 301 and the fixed seat 4, specifically, a supporting portion is constructed on the upper rod body 301, which can adopt an annular supporting edge 8, which provides support to one side of the second sealing member 7, the other side of the second sealing member 7 is in contact with the fixed seat 4, so as to be abutted between the supporting edge 8 and the fixed seat 4, the second sealing member 7 can adopt an annular sealing gasket structure.

[0041] It should be understood that, in the development of any actual implementation, as in any engineering or design project, numerous implementation-specific decisions can be made. Such development efforts, while possibly complex and time-consuming, would nevertheless be a routine undertaking for those of ordinary skill in the art having the benefit of this disclosure, without undue experimentation.

[0042] It should be noted that the above examples are only used to illustrate the technical scheme of the utility model and not to limit, although the utility model has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical scheme of the utility model can be modified or replaced equivalently without departing from the spirit and scope of the utility model technical scheme, which should be covered in the scope of claims of the utility model.

Claims

1. A metal-seated butterfly valve characterized by: The valve comprises a valve body, a valve stem and a valve plate, wherein: The valve stem is detachably connected with the valve body; The valve stem is limited by the valve plate during the connection with the valve body, and the valve stem and the valve plate are in transmission cooperation.

2. The metal-sealed butterfly valve of claim 1, wherein: The valve stem and the valve plate are in plug-in cooperation.

3. The metal-seated butterfly valve of claim 1, wherein: The valve stem comprises an upper stem body and a lower stem body, both of which are detachably connected with the valve body, and the upper stem body and the lower stem body are respectively in plug-in cooperation with the valve plate at different positions.

4. The metal-seated butterfly valve of claim 3, wherein: The upper stem body is rotatably arranged on the valve body and is in spline cooperation with the valve plate.

5. The metal-seated butterfly valve of claim 4, wherein: The lower stem body is fixedly arranged on the valve body.

6. The metal-seated butterfly valve of claim 5, wherein: A fixing seat is further provided, which is detachably connected with the valve body, the upper stem body is in rotational cooperation with the fixing seat, and the lower stem body is fixedly connected with the fixing seat.

7. The metal-sealed butterfly valve of claim 6, wherein: The fixing seat and the valve body are connected through a bolt assembly.

8. The metal-seated butterfly valve of claim 6, wherein: The valve body is provided with a mounting portion, the fixing seat is in alignment cooperation with the mounting portion, and a first sealing element is arranged between the fixing seat and the mounting portion.

9. The metal-seated butterfly valve of claim 6, wherein: A second sealing element is arranged between the upper stem body and the fixing seat.

10. The metal-seated butterfly valve of claim 9, wherein: A supporting portion is arranged on the upper stem body, and one side of the second sealing element is supported by the supporting portion.

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