Fixing device for mounting seat in valve body

Abstract

The utility model relates to a fixing device for mounting seats in a valve body, the side wall of the valve body is provided with four connecting columns, the number of the mounting seats is four, the mounting seats are annularly distributed on the inner wall of the valve body, the fixing device comprises a fixing plate, the fixing plate is annular, and the connecting columns are arranged on the fixing plate. The fixing plate is provided with through holes allowing the connecting columns to penetrate through in a one-to-one correspondence mode. The positioning assembly comprises four positioning plates connected to the inner wall of the fixing plate, a positioning column is connected to each positioning plate, a positioning hole allowing the positioning column to penetrate through is formed in the mounting seat, and the positioning column is locked and fixed through a nut after penetrating through the positioning hole in the mounting seat. According to the fixing device, the fixing plate and the positioning assembly are arranged and matched with the connecting column structure of the valve body, so that the purpose of positioning the positions of the mounting seats needing to be welded is achieved, the four mounting seats can be positioned at the same time, the welding position of each mounting seat is accurate, and the welding efficiency is improved. Therefore, smooth installation of follow-up accessories is guaranteed, and the whole process is convenient to operate.

Description

Technical Field

[0001] The utility model relates to the field of valve body processing, in particular to a fixing device for a mounting seat in a valve body. Background Art

[0002] The valve body of the single crystal furnace is an important part of the single crystal furnace, mainly used to control the melt flow and maintain high vacuum in the furnace. As a key device for controlling the melt flow, the valve body of the single crystal furnace can accurately adjust the melt flow, thereby ensuring the quality and stability of single crystal growth. At the same time, in the high temperature and high vacuum environment of the single crystal furnace, the valve body also plays an important role in maintaining high vacuum in the furnace.

[0003] The valve body of the single crystal furnace is mainly composed of a valve cover, a valve stem and a valve seat. The valve cover is made of stainless steel, which has good corrosion resistance and sealing performance; the valve stem is an important component connecting the valve cover and the valve seat, usually made of molybdenum alloy material, with high strength and corrosion resistance; the valve seat is a key component of the valve body, usually made of high-temperature ceramic material, with excellent high temperature resistance, corrosion resistance and sealing performance.

[0004] At present, during the processing of the valve body of a single crystal furnace, some accessories need to be installed in the valve body, and the required fixing seats need to be welded and installed on the inner wall of the valve body in advance. These fixing seats are distributed in a ring shape, and the position requirements of the fixing seats are relatively high, otherwise it is easy to make the accessories difficult to install. The existing installation method of the fixing seat is to manually measure and mark the position of each mounting seat with a measuring tool, determine the installation position of the mounting seat, and then weld the mounting seat. The whole process is very troublesome. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a fixing device for a mounting seat in a valve body, which can facilitate the installation of a fixing seat of accessories in the valve body.

[0006] In order to solve the above technical problems, the technical solution of the utility model is: a telescopic transport joist, the side wall of the valve body is provided with four connecting columns extending outward, and there are four mounting seats in total, which are distributed in a ring shape on the inner wall of the valve body on the side where the connecting columns are installed. The innovative point is that the fixing device includes

[0007] A fixing plate, which is in a ring shape and has through holes for the connecting columns to pass through one by one;

[0008] The positioning assembly includes four positioning plates connected to the inner wall of the fixed plate, and each positioning plate corresponds to each mounting seat one by one. A positioning column is connected to the positioning plate, and a positioning hole for the positioning column to pass through is opened on the mounting seat. After the positioning column passes through the positioning hole on the mounting seat, it is locked and fixed by a nut.

[0009] Furthermore, the positioning column includes a connecting section and a separating section distributed up and down, and the size of the connecting section is not larger than the size of the positioning hole on the mounting seat, the size of the separating section is larger than the size of the positioning hole on the mounting seat, and the outer wall of the connecting section also has an external thread structure that threadably cooperates with the nut.

[0010] The advantages of the utility model are: by setting up a fixing plate and a positioning assembly, and cooperating with the connecting column structure of the valve body itself, the position of the mounting seat to be welded can be positioned, and the positioning of four mounting seats can be achieved at the same time to ensure the accuracy of the welding position of each mounting seat, so as to ensure the smooth installation of subsequent accessories, and the whole process is relatively convenient to operate.

[0011] For the design of the positioning column, a combination structure of a connecting section and a separating section is adopted, and the size relationship between the size of the connecting section, the size of the separating section and the size of the positioning hole on the mounting seat is controlled, so that after the mounting seat is fixed on the positioning column, a certain gap can be formed between the mounting seat and the fixing plate to facilitate the subsequent welding operation of the mounting seat. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of a fixing device for a mounting seat in a valve body of the present utility model.

[0013] Figure 2 It is a schematic diagram of the positioning column in the utility model. DETAILED DESCRIPTION

[0014] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined purpose of the utility model, the specific implementation method, structure, characteristics and effects of the present invention are described in detail below in combination with the accompanying drawings and preferred embodiments.

[0015] like Figure 1 , Figure 2 A fixing device for a valve body mounting seat is shown, and the side wall of the valve body has four connecting columns extending outward. The structure of the connecting columns is an existing valve body structure, such as the positioning columns mentioned in a new single crystal furnace rotary valve mentioned in patent CN217081427U, or the connecting columns mentioned in a single crystal furnace valve body mentioned in patent CN207454893U. There are four mounting seats in total, which are distributed in a ring shape on the inner wall of the valve body on one side where the connecting columns are installed.

[0016] Fixtures include

[0017] The fixing plate 1 is in a ring shape and has four through holes 2 for the connection columns to pass through one by one. The through holes 2 are circular holes and are distributed along the circumference of the fixing plate 1 .

[0018] The positioning assembly includes four positioning plates 3 connected to the inner wall of the fixed plate 1. The positioning plates are rectangular plates, and each positioning plate 3 is integrally formed with the inner wall of the fixed plate 1. Each positioning plate 3 corresponds to the installation position required by each mounting seat one by one. A positioning column is connected to the positioning plate 3, and a positioning hole for the positioning column to pass through is opened on the mounting seat. After the positioning column passes through the positioning hole on the mounting seat, it is locked and fixed with a nut.

[0019] like Figure 2 As shown in the schematic diagram, the positioning column includes a connecting section 5 and a separating section 4 distributed up and down. The connecting section 5 is cylindrical, and the cross section of the separating section 4 is waist-shaped. The size of the connecting section 5 is not larger than the size of the positioning hole on the mounting seat, so that the connecting section 5 can pass through the positioning holes on the mounting seat in sequence. The size of the separating section 4 is larger than the size of the positioning hole on the mounting seat, so that the positioning hole on the mounting seat cannot pass through the separating section 4. The upper end face of the separating section 4 is a horizontal plane, so that the end face of the mounting seat is against the separating section 4, and the outer wall of the connecting section 5 is also provided with an external thread structure that is threadedly matched with a nut. For the design of the positioning column, a combined structure of the connecting section 5 and the separating section 4 is adopted, and the size relationship between the size of the connecting section 5, the size of the separating section 4 and the size of the positioning hole on the mounting seat is controlled, so that after the mounting seat is fixed on the positioning column, a certain gap can be formed between the mounting seat and the fixing plate to facilitate the subsequent welding operation of the mounting seat.

[0020] Working principle: When welding the mounting seats, first, respectively, mount the four mounting seats to be welded on the connecting section 5 of the positioning column one by one, and then use nuts to lock each mounting seat to complete the clamping of the mounting seats. Then, turn the fixing plate 1 upside down on the outer wall of the valve body, so that the mounting seats and the positioning column extend into the inner cavity of the valve body, and pass the connecting columns of the valve body through the through holes 2 on the fixing plate 1 one by one to complete the fixation of the fixing plate 1. Finally, weld and fix each mounting seat to the inner wall of the valve body one by one to complete the fixation of the mounting seat. The whole process is very convenient. The welding of four mounting seats can be achieved by clamping once, and there is no need to mark them one by one. Different fixing devices can be customized according to mounting seats of different positions and depths in the future.

[0021] The above description is only a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A fixing device for a mounting seat in a valve body, wherein the side wall of the valve body is provided with four connecting columns extending outward, and there are four mounting seats in total, which are distributed in a ring shape on the inner wall of the valve body on the side where the connecting columns are installed, and characterized in that: Fixtures include A fixing plate, which is in a ring shape and has through holes for the connecting columns to pass through one by one; The positioning assembly includes four positioning plates connected to the inner wall of the fixed plate, and each positioning plate corresponds to each mounting seat one by one. A positioning column is connected to the positioning plate, and a positioning hole for the positioning column to pass through is opened on the mounting seat. After the positioning column passes through the positioning hole on the mounting seat, it is locked and fixed by a nut.

2. The fixing device for the valve body mounting seat according to claim 1, characterized in that: The positioning column includes a connecting section and a separating section distributed up and down, and the size of the connecting section is not larger than the size of the positioning hole on the mounting seat, and the size of the separating section is larger than the size of the positioning hole on the mounting seat. The outer wall of the connecting section also has an external thread structure that is threadedly matched with the nut.

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