Diaphragm valve body structure capable of reducing PFA material consumption

Abstract

The utility model discloses a diaphragm valve body structure for reducing PFA material, the diaphragm valve body structure for reducing PFA material comprises a valve body sleeve, a valve body and a bottom plate, the valve body is a three-way pipe structure formed by a straight-through pipe for medium circulation and a communicating pipe, the upper half part of the valve body sleeve is of an external thread structure, the lower half part of the valve body sleeve is of a connecting seat, and the bottom plate of the valve body sleeve is of an external thread structure. The connecting seat is connected with a pipe opening of a communicating pipe of the valve body in a sleeved mode, the bottom plate is located on the side, opposite to the connecting seat, of the valve body and fixedly connected with the connecting seat, so that the valve body sleeve is fixedly connected to the valve body, the valve body is made of FPA materials, and the valve body sleeve and the bottom plate are made of non-high-purity materials. Due to the adoption of the structure, the weight of the valve body part which must be made of PFA (Polyfluoroalkoxy) materials is smaller than that of the existing PFA valve body, and the material cost and the manufacturing difficulty are reduced. And the valve body sleeve with the external thread structure and the bottom plate can be made of other non-high-purity materials, so that the production cost is reduced, and the production efficiency is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of machinery, and particularly relates to a diaphragm valve body structure for reducing the consumption of PFA materials. Background Art

[0002] At present, PFA diaphragm valves are widely used in the photovoltaic semiconductor industry. The existing PFA diaphragm valves generally consist of components such as valve bodies, diaphragms, connecting nuts, and driving mechanisms, among which the entire valve body is made of PFA material. Figure 5 Shown is a structural schematic diagram of the existing valve body. As Figure 5 shown, in order to enable the connecting nut to be smoothly connected to the valve body 5, the valve body 5 needs to be provided with an external thread structure 51 to cooperate with the internal thread of the connecting nut 5. Since the existing valve body has an external thread structure, not only is the usage amount of PFA material relatively large, but also the injection mold and the tonnage of the injection molding machine of the valve body will increase. This not only increases the material cost of the valve, but also increases the manufacturing difficulty of the valve. In addition, in order to meet the requirements of high purity, PFA materials usually use imported materials from foreign countries such as Daikin in Japan, 3M in the United States, and DuPont. The price is expensive and the delivery cycle is long, further increasing the production cost and reducing the production efficiency. Content of the Utility Model

[0003] In view of the above problems, the utility model proposes a diaphragm valve body structure for reducing the consumption of PFA materials.

[0004] The technical solution adopted by the utility model is as follows:

[0005] A diaphragm valve body structure for reducing the consumption of PFA materials, including a valve body sleeve, a valve body, and a bottom plate. It is characterized in that the valve body is a tee pipe structure composed of a straight pipe for liquid flow and a connecting pipe. The upper half of the valve body sleeve is an external thread structure, and the lower half is a connecting seat. The connecting seat is sleeved on the pipe orifice of the connecting pipe of the valve body. The bottom plate is located on the side of the valve body opposite to the connecting seat and is fixedly connected to the connecting seat, thereby fixedly connecting the valve body sleeve to the valve body. The valve body is made of FPA material, and the valve body sleeve and the bottom plate are made of non-high-purity materials.

[0006] Preferably, the non-high-purity material is PP, PP+GF, PPH, or PVDF material.

[0007] Preferably, the bottom plate and the connecting seat are fixedly connected by screws.

[0008] Preferably, the bottom of the connecting seat of the valve body sleeve is provided with 2 to 4 threaded holes, and the bottom plate is correspondingly provided with 2 to 4 threaded holes.

[0009] Compared with the prior art, the utility model has the following beneficial effects:

[0010] A diaphragm valve body structure for reducing PFA material consumption of the present utility model improves the existing PFA diaphragm valve body. The external thread structure of the valve body originally made entirely of PFA material is cancelled and replaced with non-high-purity material components, thereby reducing the weight of the PFA valve body, reducing the usage amount of PFA material, and lowering the production cost. Since the weight of the PFA valve body in the present utility model is reduced, the tonnage of the injection mold and injection machine for producing the PFA valve body can also be further reduced, thereby reducing the manufacturing difficulty and improving the production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The present utility model will be further described below with reference to the drawings.

[0012] Figure 1 It is an assembly drawing of the diaphragm valve body structure for reducing PFA material consumption of the preferred embodiment of the present utility model.

[0013] Figure 2 It is an exploded view of the diaphragm valve body structure for reducing PFA material consumption of the preferred embodiment of the present utility model.

[0014] Figure 3 It is a three-dimensional view of the valve body in the diaphragm valve body structure for reducing PFA material consumption of the preferred embodiment of the present utility model.

[0015] Figure 4 It is an assembly sectional view of the diaphragm valve body structure for reducing PFA material consumption of the preferred embodiment of the present utility model.

[0016] Figure 5 It is a three-dimensional view of the existing PFA diaphragm valve body. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0017] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise specified, the meaning of "a plurality" is two or more.

[0018] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a direct connection, or an indirect connection through an intermediate medium, and it may be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0019] The embodiments of the present utility model will be described below with reference to the accompanying drawings of the specification. It should be noted that the embodiments described in this specification are not exhaustive and do not represent the only embodiments of the present utility model. The following corresponding embodiments are only for clearly explaining the inventive content of the utility model patent of the present utility model, and do not limit its embodiments. For those of ordinary skill in the art, different forms of changes and modifications can be made on the basis of the description of these embodiments. Any changes or modifications that belong to the technical concept and inventive content of the present utility model and are obvious are also within the protection scope of the present utility model.

[0020] Figure 1 It is an assembly drawing of the diaphragm valve body structure for reducing the PFA material consumption according to the preferred embodiment of the present utility model. Figure 2 It is an exploded view of the diaphragm valve body structure for reducing the PFA material consumption according to the preferred embodiment of the present utility model. Figure 3 It is a three-dimensional view of the valve body in the diaphragm valve body structure for reducing the PFA material consumption according to the preferred embodiment of the present utility model. The following will be combined with Figures 1 - 3 A diaphragm valve body structure for reducing the PFA material consumption according to the preferred embodiment of the present utility model will be described in detail. The diaphragm valve body structure of the present utility model includes a valve body sleeve 1, a valve body 2, and a bottom plate 3. Among them, the valve body 2 is a three-way pipe structure composed of a straight pipe 21 for medium flow and a connecting pipe 22. The valve body 2 is a part made of FPA material. The two ends of the straight pipe 21 of the valve body 2 are used for connecting with the conveying pipeline. The upper half of the valve body sleeve 1 is an external thread structure 11, and the lower half is a connecting seat 12. The external thread structure 11 is used for threaded connection with a connecting nut 5 (see Figure 4 ). The connecting seat 12 is sleeved on the upper and lower ends of the connecting pipe 22 of the valve body 2. The bottom plate 3 is located on the side of the valve body 2 opposite to the connecting seat 12 and is fixedly connected to the connecting seat 12, so as to fixedly connect the valve body sleeve 1 to the valve body 2. The valve body sleeve 1 and the bottom plate 3 are made of non-high-purity materials. Preferably, the non-high-purity materials may be materials such as PP (Polypropylene), PP+GF (composite material of polypropylene and glass fiber), PPH (Polyproplyene-Homo), and PVDF (Polyvinylidene Fluoride).

[0021] In each preferred embodiment, the inner diameter of the connecting seat 12 of the valve body sleeve 1 is greater than the outer diameter of the communicating pipe 22 of the valve body 2, and the inner diameter of the external thread structure 11 is also slightly greater than the outer diameter of the communicating pipe 22. In this way, when the connecting seat 12 of the valve body sleeve 1 and the pipe orifice of the communicating pipe 22 of the valve body 2 are sleeved up and down, the external thread structure 11 can also be sleeved on the outer side of the pipe orifice of the communicating pipe 22, so as to form a stable sleeved structure.

[0022] In each preferred embodiment, the shape of the bottom plate 3 matches the shape of the connecting seat 12 of the valve body sleeve 1. Further preferably, a plurality of reinforcing ribs radially distributed along the plane where the bottom plate 3 is located are provided at the center of the bottom plate 3. In the preferred embodiment as shown in Figure 1 、 2 , the number of the reinforcing ribs is 8. Preferably, the bottom plate 3 and the connecting seat 12 are fixedly connected by screws. 2 to 4 threaded holes are provided at the bottom of the connecting seat 12 of the valve body sleeve 1, and correspondingly 2 to 4 threaded holes are provided on the bottom plate 3. In the preferred embodiment as shown in Figure 1 、 2 , the number of the threaded holes is 4.

[0023] The installation method of a diaphragm valve body structure with reduced PFA material consumption in the preferred embodiment of the present utility model is as follows: First, sleeve the valve body sleeve 1 on the connecting pipe 22 of the valve body 2, place the bottom plate 3 under the valve body 2, align the threaded holes on the connecting seat 12 of the valve body sleeve 1 with the threaded holes on the bottom plate 3 one by one and screw in the screws 7 to form a valve body structure with an external thread structure as shown in Figure 2 . Then, assemble the valve body structure, the diaphragm 4, the connecting nut 5 and the driving mechanism 6 of the present utility model in the previous assembly sequence, and perform a fastening connection by the cooperation of the connecting nut 5 and the external thread structure 11 of the valve body sleeve 1, so as to complete the installation of the diaphragm valve, as shown in Figure 4 .

[0024] The following table 1 shows a comparison table of the weights of the traditional valve bodies and the valve bodies in the valve body structure of the present utility model under three specifications. It can be seen that in the 1 / 2-inch specification, the valve body in the valve body structure of the present utility model can be 20 grams less than the existing valve body. In the 3 / 4-inch specification, the valve body of the valve body structure of the present utility model can be 67 grams less than the existing valve body. In the 1-inch specification, the valve body of the valve body structure of the present utility model can be 78 grams less than the existing valve body. The larger the valve body size, the more FPA material can be saved by the valve body structure of the utility model.

[0025] Table 1

[0026] Specification Existing valve body weight Valve body weight of this application Material savings 1 / 2 inch 95 g 75 g 20 g 3 / 4 inch 252 g 185 g 67 g 1 inch 318 g 240 g 78 g

[0027] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above-mentioned exemplary embodiments, and the present utility model can be implemented in other specific forms without departing from the spirit or basic characteristics of the present utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present utility model. Any reference signs in the claims should not be construed as limiting the claims involved.

[0028] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A diaphragm valve body structure for reducing PFA material consumption, characterized in that: It includes a valve body sleeve, a valve body and a bottom plate. The valve body is a three-way pipe structure composed of a straight-through pipe and a connecting pipe for liquid circulation. The upper half of the valve body sleeve is an external thread structure, and the lower half is a connecting seat. The connecting seat is sleeved with the connecting pipe opening of the valve body. The bottom plate is located on the side of the valve body opposite to the connecting seat and is fixedly connected to the connecting seat, so that the valve body sleeve is fixedly connected to the valve body. The valve body is made of FPA material, and the valve body sleeve and the bottom plate are made of non-high-purity materials.

2. A diaphragm valve body structure for reducing PFA material consumption according to claim 1, characterized in that: The non-high-purity material is PP, PP+GF, PPH or PVDF material.

3. A diaphragm valve body structure for reducing PFA material consumption according to claim 1, characterized in that: The bottom plate is fixedly connected to the connecting seat by screws.

4. A diaphragm valve body structure for reducing PFA material consumption according to claim 1, characterized in that: The bottom of the valve body sleeve connecting seat is provided with 2 to 4 threaded holes, and the bottom plate is correspondingly provided with 2 to 4 threaded holes.

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