A constant air volume valve conversion device

Abstract

The present application relates to the technical field of pipeline ventilation, and particularly relates to a constant air volume valve conversion device; the constant air volume valve conversion device comprises a thin-wall constant air volume valve and a damper actuator, the top of the thin-wall constant air volume valve is fixed with the damper actuator, and the constant air volume valve conversion device further comprises an outer protection assembly with good sealing performance and an inner fixed protection assembly with high stability; the conversion device is used for mounting the conventional thin-wall constant air volume valve and the actuator in the conversion device, and has the advantages of simple structure, convenient installation, low manufacturing cost, meeting the use requirement of air volume adjustment, improved safety, reduced maintenance cost, meeting the strict sealing requirement of a radioactive area, and remote flow setting through remote control signals.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of pipeline ventilation, in particular to a constant air volume valve conversion device. BACKGROUND

[0002] In some radioactive industries, such as the field of ray devices, there is a certain degree of radioactivity in the radioactive area, and when the dust and aerosol in the ambient air are activated, the ventilation system must have good airtightness. For example, a large ray device such as a spallation neutron source, during the operation of the process equipment, the area involved in the radiation must be airtight and in a negative pressure state, and the air in the area involved in the radiation cannot be effectively treated and discharged to the outside, and the pipeline system has high requirements for airtightness and radiation protection, so thick-walled airtight pipeline systems need to be used, and the exhaust system in the ventilation system needs to limit the exhaust volume of each area. The usual way is to use a constant air volume valve to control the air volume.

[0003] Most of the conventional ventilation and air conditioning fields in the prior art use thin-walled constant air volume valves, which cannot meet the requirements of airtightness and cannot be directly applied to airtight pipeline systems. There are very few constant air volume valves on the market that can meet the requirements of radiation resistance and airtightness, and they need to be specially customized, which has very high manufacturing costs. The rotating dynamic seal structure exists between the valve stem and the valve body of the customized thick-walled constant air volume valve, and after the valve stem is repeatedly rotated to a certain number of times or a certain service life, the rotating dynamic seal has the risk of seal failure. After the seal fails, the dynamic seal structure or the entire air valve needs to be replaced, which is complex to maintain and has very high maintenance costs, so a constant air volume valve conversion device needs to be provided. SUMMARY

[0004] The purpose of the present application is to solve the problems in the background art and provide a constant air volume valve conversion device.

[0005] In order to achieve the above-mentioned purpose, the present application adopts the following technical scheme:

[0006] A constant air volume valve conversion device, comprising a thin-walled constant air volume valve and an air valve actuator, the top of the thin-walled constant air volume valve is fixed with an air valve actuator, characterized in that the constant air volume valve conversion device further comprises an outer protective component with good sealing performance and an inner fixed protective component with high stability.

[0007] Preferably, the outer protective component is composed of a shell box, a seamless steel pipe, a flange, a square flange, a sealing ring, a bolt and a nut, and a cover plate.

[0008] Preferably, the inner fixed component is composed of an air valve fixed angle steel, a pipe clamp, a fixed angle steel, an extruded polystyrene foam board, a radiation-resistant adhesive tape, and a fireproof silicone low-density foam sealing material.

[0009] Preferably, the outer side of the thin-walled constant air volume valve is nested with an outer shell box, the middle part of the left and right ends of the outer shell box is embedded and fixed with a seamless steel pipe, the outer wall of the seamless steel pipe is fixed with a flange, the top of the outer shell box is fixed with a square flange, the upper surface of the square flange is closely attached with a sealing ring, the inside of the square flange is embedded with a bolt nut, and the upper surface of the sealing ring is closely attached with a cover plate.

[0010] Preferably, the left and right ends below the outer shell box are fixed with air valve fixed angle steels, the left and right ends of the thin-walled constant air volume valve are nested with pipe clamps, the other end of the pipe clamp is fixed with the thin-walled constant air volume valve on the air valve fixed angle steel through a nut, the left and right ends of the outer shell box are fixed with extruded plate fixed angle steels, the left and right ends of the thin-walled constant air volume valve are fixed with extruded polystyrene foam plates, the outermost side of the left and right ends of the thin-walled constant air volume valve and the seamless steel pipe is nested with radiation-resistant adhesive tape, and the outer wall of the radiation-resistant adhesive tape is closely attached with fireproof silicone low-density foam sealing material.

[0011] Preferably, the sealing ring and the cover plate are embedded and fixed on the top of the square flange of the outer shell box through a bolt nut.

[0012] Preferably, the two seamless steel pipes are respectively arranged at the left and right ends of the middle part of the thin-walled constant air volume valve, and the thin-walled constant air volume valve and the seamless steel pipe are closely attached together.

[0013] Preferably, the radiation-resistant adhesive tape is wound outside the joint between the seamless steel pipe and the thin-walled constant air volume valve.

[0014] Preferably, the inner wall of the extruded polystyrene foam plate is filled with radiation-resistant gap sealing material between the outer wall of the thin-walled constant air volume valve.

[0015] Preferably, the fireproof silicone low-density foam sealing material is closely attached between the inner wall of the outer shell box, the thin-walled constant air volume valve, the seamless steel pipe and the extruded polystyrene foam plate.

[0016] The application provides a constant air volume valve conversion device, which has the following beneficial effects:

[0017] 1. The conversion device installs a conventional thin-walled constant air volume valve and an actuator inside the conversion device, has a simple structure, is convenient to install, has low manufacturing cost and meets the use requirement of adjusting air volume.

[0018] 2. The conversion device changes the rotary dynamic seal of the valve rod of a thick-walled constant air volume valve into static seal of the flange face of the conversion device, reduces the risk of seal failure, improves safety and reduces maintenance cost.

[0019] 3. The entire conversion device is a completely sealed structure, and only has static seal of the flange face, which meets the strict sealing requirement of a radioactive area.

[0020] 4. The conversion device can increase the remote flow setting of the remote control signal. BRIEF DESCRIPTION OF DRAWINGS

[0021] Fig. 1 It is the overall structure schematic diagram in the application;

[0022] Fig. 2 It is the overall structure cross section schematic diagram in the application;

[0023] Fig. 3 It is the shell box internal structure schematic diagram in the application.

[0024] Legend:

[0025] Shell box 1, seamless steel pipe 2, flange 3, square flange 4, sealing ring 5, bolt nut 6, cover plate 7, thin-walled constant air volume valve 8, air valve actuator 9, air valve fixed angle steel 10, pipe clamp 11, extruded plate fixed angle steel 12, extruded polystyrene foam board 13, radiation resistant tape 14, fireproof silicone low-density foam sealing material 15. DETAILED DESCRIPTION

[0026] Example 1, refer to Figs. 1-3 A constant air volume valve conversion device, including thin-walled constant air volume valve 8 and air valve actuator 9, the top of thin-walled constant air volume valve 8 is fixed with air valve actuator 9, the outer side of thin-walled constant air volume valve 8 is nested with shell box 1, the middle part of the left and right ends of shell box 1 is embedded and fixed with seamless steel pipe 2, the outer wall of seamless steel pipe 2 is fixed with flange 3, the top of shell box 1 is fixed with square flange 4, the upper surface of square flange 4 is close to sealing ring 5, the inside of square flange 4 is embedded with bolt nut 6, the upper surface of sealing ring 5 is close to cover plate 7, the left and right ends below shell box 1 are fixed with air valve fixed angle steel 10, the left and right ends of thin-walled constant air volume valve 8 are nested with pipe clamp 11, the other end of pipe clamp 11 fixes thin-walled constant air volume valve on air valve fixed angle steel 10 through nut, the left and right ends of shell box 1 are fixed with extruded plate fixed angle steel 12, the left and right ends of thin-walled constant air volume valve 8 are fixed with extruded polystyrene foam board 13, the outermost side of the left and right ends of thin-walled constant air volume valve 8 and seamless steel pipe 2 is nested with radiation resistant tape 14, the outer wall of radiation resistant tape 14 is close to fireproof silicone low-density foam sealing material 15.

[0027] Two seamless steel pipes 2 are respectively arranged at the left and right ends of the middle part of thin-walled constant air volume valve 8, and the thin-walled constant air volume valve 8 and the seamless steel pipe 2 are close together;

[0028] The middle part of thin-walled constant air volume valve 8 and the middle part of seamless steel pipe 2 are on the same horizontal plane;

[0029] Radiation resistant tape 14 is wound outside the joint between seamless steel pipe 2 and thin-walled constant air volume valve 8.

[0030] The main role of the radiation-resistant tape 14 is to avoid the penetration of the radiation-resistant gap sealing material 15 along the joint between the thin-walled constant air volume valve 8 and the seamless steel pipe 2 to the inside of the seamless steel pipe 2 and the thin-walled constant air volume valve 8 during the subsequent foaming process of the radiation-resistant gap sealing material 15;

[0031] The sealing ring 5 and the cover plate 7 are embedded and fixed on the top of the square flange 4 of the shell box 1 through the bolt and nut 6;

[0032] The cover plate 7 is fixed above the shell box 1 through the sealing ring 5 and the bolt and nut 6 to seal the upper part of the device, so that the entire shell box 1 is airtight, and the thick-walled pipe system is connected to the outside through the flange 3. The entire conversion device has no dynamic sealing structure to the outside, but only has a static sealing structure on the flange surface.

[0033] Example 2 is different from example 1 in that the fireproof silicone low-density foam sealing material 15 is tightly attached between the inner wall of the shell box 1 and the extruded polystyrene foam board 13;

[0034] The extruded plate fixing angle steel 12 is welded on the shell box 1 to ensure that the extruded polystyrene foam board 13 does not move during the foaming construction of the silicone low-density foam sealing material 15;

[0035] The inner wall of the extruded polystyrene foam board 13 is tightly attached to the outer wall of the thin-walled constant air volume valve 8, and the inner wall of the extruded polystyrene foam board 13 and the outer wall of the thin-walled constant air volume valve 8 are filled with radiation-resistant gap sealing material. The main role of the radiation-resistant gap sealing material is to avoid the penetration of the filled silicone low-density foam sealing material 15 along the gap between the extruded polystyrene foam board 13 and the thin-walled constant air volume valve 8;

[0036] The poor sealing condition at both ends of the conventional thin-walled constant air volume valve 8 is changed to reliable sealing with pre-stressed foaming sealing material, which not only meets the use requirements of air volume control, but also meets the strict sealing requirements of the radioactive area;

[0037] Among them, the inner hole diameter of the thin-walled constant air volume valve 8 is usually not consistent with the inner hole diameter of the outer airtight pipeline system. The inner diameter of the seamless steel pipe 2 needs to be processed into a suitable reducing pipe according to the specific inner hole diameter at both ends, so as to improve the local air flow state and reduce the influence on the flow detection element of the thin-walled constant air volume valve 8.

[0038] Wherein, the air valve fixed angle steel 10 is welded on the shell box 1, the thin wall constant air volume valve 8 is fixed on the angle steel 10 through the pipe clamp and nut 11, the air valve actuator 9 is connected with the valve rod valve piece, and the air volume is changed through it to meet the use requirement. Remote flow setting can be increased, a remote control signal line needs to be increased, and a cable sealing adapter is installed on the stainless steel shell box 1, and the sealing is also a reliable static sealing structure;

[0039] The above is only the preferred embodiment of the present application, it should be noted that for those skilled in the art, without departing from the concept of the present application, can also make several deformation and improvement, these should also be considered as the protection scope of the present application, these will not affect the effect and practicality of the patent of the present application.

Claims

1. A constant air volume valve conversion device, comprising a thin-walled constant air volume valve (8) and a damper actuator (9), the top of the thin-walled constant air volume valve (8) is fixed with a damper actuator (9), characterized in that: The constant air volume valve conversion device further comprises: The outer protection assembly: It is composed of a shell box (1), a seamless steel pipe (2), a flange (3), a square flange (4), a sealing ring (5), a bolt and nut (6), and a cover plate (7); The left and right ends of the shell box (1) are embedded with the seamless steel pipes (2), and the outer walls of the seamless steel pipes (2) are fixed with the flanges (3); The top of the shell box (1) is fixed with the square flange (4), the upper surface of the square flange (4) is tightly attached with the sealing ring (5), the inside of the square flange (4) is embedded with the bolt and nut (6), the upper surface of the sealing ring (5) is tightly attached with the cover plate (7), and the sealing ring (5) and the cover plate (7) are embedded and fixed on the top of the square flange (4) of the shell box (1) through the bolt and nut (6), The left and right ends of the shell box (1) are embedded with the seamless steel pipes (2), and the outer walls of the seamless steel pipes (2) are fixed with the flanges (3); The inner fixation assembly: It is composed of a wind valve fixation angle steel (10), a pipe clamp (11), an extruded plate fixation angle steel (12), an extruded polystyrene foam plate (13), a radiation-resistant adhesive tape (14), and a fireproof silicone low-density foam sealing material (15); The left and right ends below the shell box (1) are fixed with the wind valve fixation angle steels (10), the left and right ends of the thin-wall constant air volume valve (8) are nested with the pipe clamps (11), and the other ends of the pipe clamps (11) fix the thin-wall constant air volume valve (8) on the wind valve fixation angle steels (10) through nuts; The left and right ends of the thin-wall constant air volume valve (8) are fixed with the extruded polystyrene foam plates (13), and the inner walls of the extruded polystyrene foam plates (13) and the outer walls of the thin-wall constant air volume valve (8) are filled with radiation-resistant gap sealing materials; the outermost sides of the left and right ends of the thin-wall constant air volume valve (8) and the seamless steel pipe (2) are nested with the radiation-resistant adhesive tapes (14), and the outer walls of the radiation-resistant adhesive tapes (14) are tightly attached with the fireproof silicone low-density foam sealing materials (15); The radiation-resistant adhesive tapes (14) are wound outside the joints between the seamless steel pipes (2) and the thin-wall constant air volume valve (8), the fireproof silicone low-density foam sealing materials (15) are tightly attached between the inner walls of the shell box (1) and the extruded polystyrene foam plates (13), and the extruded plate fixation angle steels (12) are welded on the left and right ends of the shell box (1).

2. The constant volume valve switching device of claim 1, wherein: The wind valve actuator (9) is connected with the valve rod and valve piece of the thin-wall constant air volume valve (8), the size of the air volume is adjusted by changing the position of the valve piece, and the device can increase the remote control signal line and cable sealing adapter to realize remote flow setting.

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