Automatic vent valve structure for floating tray of storage tank

Abstract

The utility model discloses an automatic vent valve structure of a floating disc of a storage tank, which comprises a valve seat, a valve core, a sleeve, a first baffle and a second baffle, and the valve seat is arranged in a vent hole of the floating disc; the valve element comprises a supporting column and a cover plate which are connected into a whole. The supporting column is located in the center of the interior of the valve seat and vertically distributed. The cover plate is located at the top end of the supporting column to cover or separate from the valve seat top flange. The sleeve sleeves the supporting column and is in sliding connection with the supporting column; the inner sides of the first baffle and the second baffle are fixed to the sleeve in a sleeving mode, the outer sides of the first baffle and the second baffle are bonded to the inner wall of the valve seat, and the first baffle and the second baffle are vertically spaced and distributed in parallel so that the projection planes of the first baffle and the second baffle can cover the cross section of the valve seat. During line sweeping operation, liquid surges under the action of pressure and upwells from the interior of the valve seat, and the first baffle and the second baffle can prevent the liquid from upwelling, so that the liquid is prevented from rising to the floating disc.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of storage tank floating disc ventilation structure, more particularly to a kind of automatic ventilation valve structure of storage tank floating disc. BACKGROUND

[0002] For the large storage tank of storing petroleum or chemical industry, due to the existence of volatile medium, under the situation of strengthening environmental protection management, the VOCs emission management thereof is carried out. Among them, the full liquid type composite material floating roof is one of effective devices for preventing volatile liquid VOCs emission.

[0003] The floating roof structure mainly includes a floating disc, an electrostatic discharge device, an automatic ventilation valve, an anti-rotation device and a drainage device, wherein the automatic ventilation valve is a device capable of automatically adjusting the air inlet and outlet according to the pressure change in the tank, and its working principle is usually to control the opening and closing of the valve through the pressure difference to keep the pressure balance between the tank and the external environment.

[0004] However, at present, when the automatic ventilation valve is operated, the mixture of gas and liquid will overflow from the automatic ventilation valve at the same time, causing the liquid to overflow onto the floating disc.

[0005] Therefore, it is an urgent problem for those skilled in the art to provide an automatic ventilation valve structure for a storage tank floating disc. SUMMARY

[0006] Therefore, the utility model provides an automatic ventilation valve structure for a storage tank floating disc, which solves the technical problem of liquid overflow onto the floating disc when the existing floating disc is operated.

[0007] In order to achieve the above-mentioned purpose, the utility model adopts the following technical solutions:

[0008] An automatic ventilation valve structure for a storage tank floating disc includes a valve seat, a valve core, a sleeve, a first baffle and a second baffle, the valve seat is installed in the ventilation hole of the floating disc; the valve core includes a support column and a cover plate connected as one body, the support column is vertically distributed in the central part of the valve seat; the cover plate is located at the top end of the support column to be combined with or separated from the top flange of the valve seat; the sleeve is sleeved on the support column and is slidingly connected therewith; the first baffle and the second baffle are both fixedly sleeved on the sleeve, the outer sides of the first baffle and the second baffle are bonded to the inner wall of the valve seat, and the first baffle and the second baffle are spaced apart and parallelly distributed to cover the cross section of the valve seat.

[0009] By adopting the above technical solutions, the utility model has the following advantages:

[0010] During the line scanning operation, the liquid surges under the pressure and surges upwards from the valve seat, and the first baffle and the second baffle can block the upward surge of the liquid, thereby avoiding the liquid from surging upwards to the top of the floating plate.

[0011] Further, the main body of the first baffle and the second baffle is semicircular.

[0012] Further, the ventilation area formed between the first baffle, the second baffle and the sleeve is greater than the gap area formed between the first baffle and the valve seat.

[0013] Further, the valve seat, the support column, the cover plate, the sleeve, the first baffle and the second baffle are all composite materials.

[0014] The beneficial effects produced by the above further technical solutions are light weight and high strength.

[0015] Further, the diameter of the valve seat and the cover plate is less than 600mm.

[0016] The beneficial effects produced by the above further technical solutions are that the installation operation can be facilitated by entering from the manhole of the storage tank.

[0017] Further, the cover plate and the floating plate are electrically connected through the static wire. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced. Obviously, the drawings in the following description are only embodiments of the present application, and for those skilled in the art, other drawings can be obtained without creative labor on the basis of the provided drawings.

[0019] Figure 1 The drawing is a perspective view of a storage tank floating plate automatic ventilation valve structure provided by the present application.

[0020] Figure 2 The drawing is a perspective view of another view of a storage tank floating plate automatic ventilation valve structure provided by the present application.

[0021] Figure 3 The drawing is a sectional view of a storage tank floating plate automatic ventilation valve structure provided by the present application. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0023] like Figure 1-3 As shown, the embodiment of the utility model discloses an automatic vent valve structure of a tank float, including a valve seat 1, a valve core 2, a sleeve 3, a first baffle 4 and a second baffle 5. The valve seat 1 is installed in the vent hole of the float 6; the valve core 2 includes a support column 21 and a cover plate 22 connected as one body, the support column 21 is located in the center of the valve seat 1 and is vertically distributed; the cover plate 22 is located at the top of the support column 21 to cover or separate with the flange on the top of the valve seat 1, that is, after the float 6 falls to the ground, the cover plate 22 can be lifted up, and gas can be discharged from the open The first baffle 4 and the second baffle 5 are both fitted and fixed on the sleeve 3. The outer sides of the first baffle 4 and the second baffle 5 are both bonded to the inner wall of the valve seat 1. The first baffle 4 and the second baffle 5 are spaced apart and arranged in parallel so that the projected surface of the first baffle 4 and the second baffle 5 covers the cross section of the valve seat 1. During the line sweeping operation of the utility model, the liquid surges under the action of pressure and surges from the valve seat 1. The first baffle 4 and the second baffle 5 can block the upwelling of the liquid, thereby preventing the liquid from overflowing onto the floating plate 6.

[0024] Specifically, the main bodies of the first baffle 4 and the second baffle 5 are both semicircular.

[0025] Specifically, the ventilation area formed between the first baffle 4 , the second baffle 5 and the sleeve 3 is larger than the gap area formed between the first baffle 4 and the valve seat 1 .

[0026] Specifically, the valve seat 1 , the support column 21 , the cover plate 22 , the sleeve 3 , the first baffle 4 and the second baffle 5 are all made of composite materials, which are light in weight and high in strength.

[0027] Specifically, the diameters of the valve seat 1 and the cover plate 22 are both less than 600 mm, and can be entered through the manhole of the storage tank, which facilitates installation operations.

[0028] Specifically, an electrostatic wire 7 is further included, and the cover plate 22 and the floating plate 6 are electrically connected via the electrostatic wire 7 .

[0029] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. Reference can be made to the common and similar parts between the various embodiments. For the devices disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple, and the relevant parts can be referred to the method description.

[0030] The above description of the disclosed embodiments will enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A tank float automatic vent valve structure, characterized in that: It includes a valve seat, a valve core, a sleeve, a first baffle and a second baffle, and the valve seat is installed in the vent hole of the float; the valve core includes a support column and a cover plate connected as an integral whole, the support column is located in the center of the valve seat and is vertically distributed; the cover plate is located at the top of the support column to cover or separate from the flange on the top of the valve seat; the sleeve is sleeved on the support column and slidably connected thereto; the inner sides of the first baffle and the second baffle are both sleeved and fixed on the sleeve, and the outer sides of the first baffle and the second baffle are both bonded to the inner wall of the valve seat, and the first baffle and the second baffle are spaced apart and distributed in parallel up and down, so that the projection surface of the first baffle and the second baffle covers the cross-section of the valve seat.

2. The automatic vent valve structure for a storage tank float according to claim 1 is characterized in that: The main bodies of the first baffle and the second baffle are both semicircular.

3. The automatic vent valve structure for a storage tank float according to claim 1 or 2, characterized in that: A ventilation area formed between the first baffle, the second baffle, and the sleeve is larger than a gap area formed between the first baffle and the valve seat.

4. The automatic vent valve structure for a storage tank float according to claim 1, characterized in that: The valve seat, the support column, the cover plate, the sleeve, the first baffle and the second baffle are all made of composite materials.

5. The automatic vent valve structure for a storage tank float according to claim 1 is characterized in that: The diameters of the valve seat and the cover plate are both less than 600 mm.

6. The automatic vent valve structure for a storage tank float according to claim 1, characterized in that: It also includes an electrostatic wire, and the cover plate and the floating plate are electrically connected through the electrostatic wire.

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