CN204358135U - Two flange butterflies of valve with changeable valve seat - Google Patents

Abstract

The utility model relates to a double-flange butterfly valve with a replaceable valve seat, which comprises a cylindrical valve body with flanges at both ends and an upper and lower valve neck in the center, a valve seat arranged on the inner wall of the valve to seal and connect the valve plate, and a valve body. plate, the valve shaft that drives the valve plate to rotate, and the transmission device that drives the valve shaft. It is characterized in that the valve seat is a centerline butterfly valve rubber seat, and the end face of one side of the cylindrical valve body is coaxial with the valve body. The butterfly valve rubber seat is embedded in the seam, and a seat pressure ring with a flange on one side is provided. The valve seat pressure ring is inserted into the seam with a sliding fit to press against the centerline butterfly valve rubber seat, and its flange The end face of the valve body is flush with the end face of the flange of the valve body and embedded into the corresponding flange side of the flange of the valve body, and fixed on the valve body by screws; the rubber seat of the centerline butterfly valve is lined with a metal skeleton or a resin skeleton A vulcanized rubber layer is formed. The beneficial effects of the utility model are: the valve seat is convenient to replace, and at the same time, the valve structure is simplified, the assembly is convenient, and the production efficiency is improved.

Description

Double flange butterfly valve with replaceable seat

technical field

The utility model relates to a butterfly valve, in particular to a double-flange butterfly valve with a replaceable valve seat.

Background technique

Butterfly valves are widely used in petroleum, gas, chemical, water treatment and other industrial fields because of their simple structure, small size, light weight, convenient and quick opening and closing, labor-saving, and good fluid control characteristics. Butterfly valves are generally used in cylindrical passages. During use, the disc-shaped valve plate is installed perpendicular to the pipeline, and the valve shaft is used as the central axis to reciprocate between 0° and 90° to achieve full closure and full opening.

The double-flange butterfly valve is a commonly used butterfly valve. It is mainly composed of a cylindrical valve body with flanges at both ends and an upper and lower valve neck in the center, a rubber valve seat on the inner wall of the valve that is sealed and connected to the valve plate, a valve plate, and a driving valve plate. It consists of a rotating valve shaft and a transmission device that drives the valve shaft. When in use, the flanges at both ends are connected to the pipe flanges with bolts. The transmission can be a handle, manual head, pneumatic head or electric head.

At present, the main problem of the double-flange butterfly valve is that the rubber valve seat is a vulcanized rubber layer attached to the inner wall of the valve. Once the sealing surface is damaged irreparably during use, the rubber layer must be burned and re-vulcanized. The cost is high and the operation is complicated, and the cycle is long. How to update the valve seat conveniently and quickly so that it can continue to be used through partial replacement has become a concern in the industry. In addition, the seat of the existing centerline butterfly valve is a separate annular rubber seat, which is usually formed by a metal or resin skeleton lined with a vulcanized rubber layer, and has various sizes and specifications. The circular valve body of the blue butterfly valve and the detachable connection through fasteners can achieve the purpose of convenient and quick update of the valve seat.

Utility model content

The main purpose of the utility model is to solve the above problems and provide a double-flange butterfly valve with a replaceable valve seat, so as to realize the effect that once the valve seat is damaged, it can be dismantled and replaced immediately, and at the same time simplify the valve structure, facilitate assembly, and improve production efficiency. cut costs.

The technical scheme that the utility model solves its technical problem adopts is:

A double-flange butterfly valve with a replaceable valve seat, comprising a cylindrical valve body with flanges at both ends and an upper and lower valve neck in the center, a valve seat arranged on the inner wall of the valve body to seal and connect the valve plate, a valve plate, and a driving valve. The valve shaft that the plate rotates and the transmission device that drives the valve shaft are characterized in that the valve seat is a centerline butterfly valve rubber seat, and a stop is provided on the end surface of one side of the cylindrical valve body coaxially with the valve body, and the centerline The rubber seat of the butterfly valve is embedded in the seam, and a seat pressure ring with a flange on one side is provided. The end face of the flange edge is flush with the end face of the flange of the valve body and embedded into the flange edge seam corresponding to the flange of the valve body, and is fixed on the valve body by screws.

The rubber valve seat of the centerline butterfly valve is formed by a vulcanized rubber layer lined with a metal skeleton or a resin skeleton.

The transmission device is a handle, a manual head, a pneumatic head or an electric head.

The beneficial effects of the utility model are: since a double-flange butterfly valve with a replaceable valve seat is provided, the replaceable existing midline butterfly valve seat is used to replace the vulcanized rubber lining of the original double-flange butterfly valve. The seat structure is fixed, so that once the seat is damaged, it can be disassembled and replaced immediately, avoiding the tedious and costly process of re-making the rubber lining of the valve body as a whole, improving the service life of the valve body and reducing operating costs. In addition, the use of double-flange butterfly valves with replaceable valve seats simplifies the valve structure, facilitates production and assembly, improves production efficiency, and reduces costs.

Description of drawings

Fig. 1 is the front view sectional structure schematic diagram of the utility model;

Fig. 2 is the right view of Fig. 1;

Figure 3 is a schematic diagram of the assembly of the centerline butterfly valve seat, seat pressure ring and double-flange butterfly valve body;

Fig. 4 is a left side view of the valve seat pressure ring in Fig. 3 .

In the figure: 1 manual head, 2 upper bushing, 3 valve body, 31 upper valve neck, 32 lower valve neck, 33 flange, 34 flange side seam, 4 center line butterfly valve rubber seat, 5 cone pin, 6 valve Shaft, 7 valve plate, 8 lower shaft sleeve, 9 valve seat pressure ring, 91 flange edge, 10 screw, 11 sealing ring, 12 seam.

The utility model is described in detail below in conjunction with accompanying drawing and embodiment.

Detailed ways

Figures 1-2 show a double-flange butterfly valve with replaceable valve seats, which includes a cylindrical valve body 3 with flanges 33 at both ends and upper and lower valve necks 31 and 32 in the center. The valve seat of the valve plate, the valve plate 7, the valve shaft 6 that drives the valve plate 7 to rotate and the transmission device that drives the valve shaft are sealed and connected. The transmission device can be a handle, a manual head, a pneumatic head or an electric head. In this embodiment, a Manual head 1. The manual head 1 is installed on the upper valve neck 31, and is fixedly connected with the valve shaft 6 through a key. The valve shaft 6 is inserted in the shaft hole provided in the upper and lower valve necks through the upper shaft sleeve 2, the sealing ring 11 and the lower shaft sleeve 8, and the valve plate 7 is fixed on the valve shaft through the conical pin 5.

The utility model is characterized in that the above-mentioned valve seat is a centerline butterfly valve rubber seat 4; a stop 12 is arranged coaxially with the valve body on one end surface of the above-mentioned cylindrical valve body, and the above-mentioned centerline butterfly valve rubber seat 4 is embedded in the stop 12, and set a valve seat pressure ring 9 with a flange edge 91 on one side. The valve seat pressure ring 9 is inserted into the seam 12 with a sliding fit to press against the centerline butterfly valve rubber valve seat 4, with its flange edge 91 The end face of the valve body is flush with the end face of the valve body flange 33 and is embedded in the flange edge stop 34 corresponding to the valve body flange, and is fixed on the valve body by screws 10. In this example, hexagon socket cap set screws are used for the screws. Figure 3 and Figure 4 show the assembly diagram of the centerline butterfly valve seat, seat pressure ring and double-flange butterfly valve body and the seat pressure ring structure. As shown in the figure, the valve body flange 33 and the seat pressure ring Mounting screw holes are correspondingly provided on the flange sides 91 of the flanges 91 for fixing the screws 10 . And after the centerline butterfly valve seat and the valve seat pressure ring are installed, the end faces of the valve body flange 33 and the valve seat pressure ring 91 are flush, so that the sealed connection with the fluid pipeline can be realized.

The above-mentioned rubber seat of the centerline butterfly valve is formed by a metal skeleton or a resin skeleton lined with a vulcanized rubber layer. In this example, a resin skeleton is lined with a vulcanized rubber layer. The rubber seat of the centerline butterfly valve is an existing commercial product, which can be selected according to the specifications and design requirements of the double flange butterfly valve.

To sum up, the double-flange butterfly valve with replaceable valve seat provided by the utility model can be disassembled and replaced once the valve seat is damaged in use, avoiding the tedious and costly process of re-making the rubber lining layer on the whole valve body, and improving the performance of the valve. Longer service life and lower operating costs. In addition, the use of double-flange butterfly valves with replaceable valve seats simplifies the valve structure, facilitates production and assembly, improves production efficiency, and reduces costs.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the structure of the present invention in any form. Any simple modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the present invention still belong to the scope of the technical solution of the present invention.

Claims (3)

1. two flange butterflies of a valve with changeable valve seat, comprise two ends flanged, central authorities establish the cylinder valve of upper and lower valve neck, at the valve seat of the valve plate that is tightly connected that valve interior wall is arranged, valve plate, the valve shaft driving valve plate to rotate and actuating valve shaft drive, it is characterized in that described valve seat is centre-pivoted butterfly valve rubber valve seat, in described cylinder valve one side end face and valve body, coaxially seam is set, described centre-pivoted butterfly valve rubber valve seat is inlaid in described seam, and the valve seat pressure ring on flanged limit, side is set, described valve seat pressure ring inserts seam to be slidably matched and is pressed on centre-pivoted butterfly valve rubber valve seat, enter in the corresponding flange edge seam arranged of valve flange with its flange edge end face and the concordant setting-in of valve flange end face, and be packed on valve body by screw.

2. two flange butterflies of valve with changeable valve seat according to claim 1, is characterized in that described centre-pivoted butterfly valve rubber valve seat is formed by metal frame or resin matrix liner vulcanised rubber layer.

3. two flange butterflies of valve with changeable valve seat according to claim 1 and 2, is characterized in that described transmission device is handle, manual heads, pneumatic head or electrical header.