Low-leakage environmentally friendly breather valve

Abstract

The utility model discloses a low leakage environmental protection type breathing valve relates to breathing valve technical field. The utility model discloses a cylinder, and the cylinder top is installed with positive pressure valve chamber, and the cylinder right side is installed with negative pressure valve chamber, and the positive pressure valve chamber top and bottom with negative pressure valve chamber top all are provided with sealing mechanism, and sealing mechanism includes: valve cover, connecting block, connecting block fixedly connected at the positive pressure valve chamber top, and the connecting block inner wall is fixedly connected with the labyrinth groove, and the valve cover one side close to connecting block is fixedly connected with the clamping block, and the clamping block bottom contacts with the labyrinth groove top, gasket, gasket sets up between valve cover and connecting block, and valve cover, gasket and connecting block are fixedly connected through a plurality of bolts. Through setting sealing mechanism, specifically is the gasket between valve cover and connecting block realizes basic sealing, and simultaneously the clamping block on valve cover and the labyrinth groove of connecting block inner wall contact form the labyrinth seal, and double sealing structure can effectively avoid medium leakage, and the problem that the current breathing valve sealing mode easily leads to medium seepage is solved.

Description

Technical Field

[0001] This utility model belongs to the field of breathing valve technology, and in particular relates to a low-leakage environmentally friendly breathing valve. Background Technology

[0002] As a key safety accessory for equipment such as storage tanks and pressure vessels, the breather valve's core function is to automatically regulate the air pressure balance inside and outside the equipment, preventing safety accidents such as deformation or damage caused by overpressure or negative pressure.

[0003] With increasingly stringent environmental regulations and the growing emphasis on safe production and green operation by enterprises, the market has placed higher demands on the sealing performance and leakage control capabilities of breather valves. However, most traditional breather valves rely solely on the bolt connection between the valve cover and the valve chamber to achieve sealing.

[0004] This sealing method is prone to causing the medium to leak from the sealed connection, which not only causes medium loss but also pollutes the surrounding environment, making it difficult to meet the low leakage environmental protection standards. Utility Model Content

[0005] The purpose of this utility model is to provide a low-leakage, environmentally friendly breather valve. By setting a sealing mechanism, specifically, the valve cover is fixed to the connecting block by bolts, and the gasket between the two achieves basic sealing. At the same time, the locking block on the valve cover contacts the labyrinth groove on the inner wall of the connecting block to form a labyrinth seal. The double sealing structure can effectively prevent media leakage and solve the problem that the existing breather valve sealing method is prone to media leakage.

[0006] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0007] This utility model relates to a low-leakage, environmentally friendly breather valve, comprising a cylinder. A positive pressure valve chamber is installed at the top of the cylinder, and a negative pressure valve chamber is installed on the right side of the cylinder. Sealing mechanisms are provided at the top and bottom of the positive pressure valve chamber and at the top of the negative pressure valve chamber to prevent media leakage. The sealing mechanisms include:

[0008] Valve covers are provided at the top and bottom of the positive pressure valve chamber and at the top of the negative pressure valve chamber. The bottom of the valve cover located at the bottom of the positive pressure valve chamber is fixedly connected to the top of the cylinder.

[0009] A connecting block is fixedly connected to the top and bottom of the positive pressure valve chamber and the top of the negative pressure valve chamber, respectively. A labyrinth groove is fixedly connected to the inner wall of the connecting block. A locking block is fixedly connected to the side of the valve cover near the connecting block, and the bottom of the locking block contacts the top of the labyrinth groove.

[0010] A gasket is disposed between the valve cover and the connecting block, and the valve cover, gasket, and connecting block are fixedly connected by a number of bolts.

[0011] Furthermore, a connecting pipe is fixedly connected to the left side of the positive pressure valve chamber, and flanges are fixedly connected to both the left side of the connecting pipe and the bottom of the cylinder.

[0012] Furthermore, the flange 131 conforms to the HG / T20592-2009 standard, the flange face type is TT1, the nominal diameter is DN100, and the specifications of the cylinder 1 are φ114.3×183, the wall thickness S=4mm, and the material is 304 stainless steel.

[0013] Furthermore, a filter element is provided on the inner wall of the cylinder near the bottom.

[0014] Furthermore, a fine filter screen is fixedly connected to the top of the filter element, and a coarse filter screen is fixedly connected to the bottom of the filter element.

[0015] Furthermore, four support blocks are fixedly connected to the inner wall of the cylinder near the bottom of the filter element, and the support blocks are fixedly connected to the filter element by bolts.

[0016] This utility model has the following beneficial effects:

[0017] 1. This utility model sets up a sealing mechanism, specifically, the valve cover is fixed to the connecting block by bolts, and the gasket between the two achieves basic sealing. At the same time, the locking block on the valve cover contacts the labyrinth groove on the inner wall of the connecting block to form a labyrinth seal. The double sealing structure can effectively prevent media leakage and improve sealing performance.

[0018] 2. This utility model incorporates a filter element. Specifically, when the medium enters the breather valve, it first flows through the filter element near the bottom of the inner wall of the cylinder. The medium first contacts the coarse filter screen at the bottom of the filter element to complete the initial filtration of large-particle impurities, and then passes through the fine filter screen at the top of the filter element for fine filtration. This prevents impurities from entering the breather valve. The dual-layer graded filtration structure prevents a single filter screen from becoming clogged due to excessive accumulation of impurities.

[0019] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0022] Figure 2 This is a schematic diagram of the sealing mechanism of this utility model;

[0023] Figure 3 This is a schematic diagram of the overall internal structure of this utility model;

[0024] Figure 4 This is a schematic diagram of the filter element structure of this utility model;

[0025] Figure 5 This is a schematic diagram of the support block structure of this utility model.

[0026] The attached diagram lists the components represented by each number as follows:

[0027] 1. Cylinder; 11. Positive pressure valve chamber; 111. Valve cover; 112. Connecting block; 113. Labyrinth groove; 114. Locking block; 115. Gasket; 12. Negative pressure valve chamber; 13. Connecting pipe; 131. Flange; 14. Filter element; 141. Fine filter screen; 142. Coarse filter screen; 143. Support block. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0029] Please see Figures 1-5 As shown, this utility model has the following two specific embodiments.

[0030] Example 1

[0031] This utility model is a low-leakage, environmentally friendly breather valve, including a cylinder 1. A positive pressure valve chamber 11 is installed at the top of the cylinder 1, and a negative pressure valve chamber 12 is installed on the right side of the cylinder 1. Sealing mechanisms are provided at the top and bottom of the positive pressure valve chamber 11 and at the top of the negative pressure valve chamber 12 to prevent media leakage. The sealing mechanisms include:

[0032] Valve cover 111 is provided on the top and bottom of the positive pressure valve chamber 11 and the top of the negative pressure valve chamber 12. The bottom of the valve cover 111 located at the bottom of the positive pressure valve chamber 11 is fixedly connected to the top of the cylinder 1.

[0033] Connecting block 112 is fixedly connected to the top and bottom of positive pressure valve chamber 11 and the top of negative pressure valve chamber 12 respectively. A labyrinth groove 113 is fixedly connected to the inner wall of connecting block 112. A locking block 114 is fixedly connected to the side of valve cover 111 near connecting block 112. The bottom of locking block 114 contacts the top of labyrinth groove 113.

[0034] Gasket 115 is disposed between valve cover 111 and connecting block 112. Valve cover 111, gasket 115 and connecting block 112 are fixedly connected by several bolts.

[0035] like Figures 1-2 As shown, by setting a sealing mechanism, specifically, the valve cover 111 is fixed to the connecting block 112 by bolts, and the gasket 115 between the two achieves basic sealing. At the same time, the locking block 114 on the valve cover 111 contacts the labyrinth groove 113 on the inner wall of the connecting block 112 to form a labyrinth seal. The double sealing structure can effectively prevent media leakage and improve sealing performance.

[0036] A connecting pipe 13 is fixedly connected to the left side of the positive pressure valve chamber 11, and flanges 131 are fixedly connected to the left side of the connecting pipe 13 and the bottom of the cylinder 1.

[0037] Flange 131 conforms to HG / T20592-2009 standard, the flange type is TT1, the nominal diameter is DN100, the specifications of cylinder 1 are φ114.3×183, the wall thickness S=4mm, and the material is 304 stainless steel.

[0038] Flange 131 provides a standardized quick-connect interface for the breather valve, facilitating assembly and connection with upstream and downstream equipment. The flange connection method combines strong connection and reliable sealing. The TT1 type flange 131 conforms to the HG / T20592-2009 standard and can be adapted to common equipment of the same specifications in the industry, reducing the cost of equipment docking and adaptation and the difficulty of later replacement. The cylinder is made of 304 stainless steel with a specification of φ114.3×183 and a wall thickness of S=4mm, which has excellent corrosion resistance and rust resistance, can adapt to complex working conditions and extend the overall service life of the breather valve. The reasonable wall thickness design ensures the structural strength and pressure bearing capacity of the cylinder while taking into account the need for lightweight equipment.

[0039] Example 2

[0040] The difference from Example 1 is that this example discloses a filter element 14:

[0041] A filter element 14 is installed on the inner wall of the cylinder 1 near the bottom.

[0042] A fine filter screen 141 is fixedly connected to the top of the filter element 14, and a coarse filter screen 142 is fixedly connected to the bottom of the filter element 14.

[0043] like Figures 3-5As shown, by setting filter element 14, when the medium enters the breather valve, it will first flow through the filter element 14 near the bottom of the inner wall of the cylinder 1. The medium first contacts the coarse filter screen 142 at the bottom of the filter element 14 to complete the preliminary filtration of large-particle impurities, and then passes through the fine filter screen 141 at the top of the filter element 14 to achieve fine filtration, thus preventing impurities from entering the breather valve. The double-layer graded filtration structure avoids the blockage of a single filter screen due to excessive accumulation of impurities.

[0044] Four support blocks 143 are fixedly connected to the inner wall of the cylinder 1 near the bottom of the filter element 14. The support blocks 143 are fixedly connected to the filter element 14 by bolts.

[0045] The bolted connection method combines the strength of the connection with the ease of disassembly, making it convenient to disassemble, clean or replace the filter element 14 later.

[0046] A specific application of this embodiment is as follows: In use, the breather valve is first connected to the medium inlet and outlet using the flange 131 at the bottom of the cylinder 1 and the left side of the connecting pipe 13. The flange 131 conforms to the HG / T20592-2009 standard, has a TT1 type flange face, and a nominal diameter of DN100, enabling standardized and rapid connection. The cylinder 1 is made of 304 stainless steel with a φ114.3×183 specification and a wall thickness S=4mm, ensuring the overall structural strength and corrosion resistance. When the medium enters the breather valve, it first flows through the filter element 14 near the bottom of the inner wall of the cylinder 1. The medium first contacts the coarse filter screen 142 at the bottom of the filter element 14 to complete the initial filtration of large-particle impurities, and then passes through the fine filter screen 141 at the top of the filter element 14 for fine filtration. The filtered clean medium flows upward. When the internal pressure of the equipment reaches the positive pressure threshold... When the positive pressure valve chamber 11 is open, it will release pressure. When a negative pressure is formed inside, the negative pressure valve chamber 12 will open to replenish air. During this process, the sealing mechanisms at the top and bottom of the positive pressure valve chamber 11 and the top of the negative pressure valve chamber 12 will ensure the sealing effect. Specifically, the valve cover 111 is fixed to the connecting block 112 by bolts, and the gasket 115 between the two achieves basic sealing. At the same time, the locking block 114 on the valve cover 111 contacts the labyrinth groove 113 on the inner wall of the connecting block 112 to form a labyrinth seal. The double sealing structure can effectively prevent media leakage. When the filter element 14 needs to be replaced or cleaned, the breather valve is removed through the flange 131, the bolts between the cylinder 1 and the positive pressure valve chamber 11 are unscrewed to separate the cylinder 1 and the positive pressure valve chamber 11, and then the bolts between the filter element 14 and the support block 143 are unscrewed to remove the filter element 14 from the top of the cylinder 1.

[0047] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0048] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the present utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the present utility model, thereby enabling those skilled in the art to better understand and utilize it. The present utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A low-leakage, environmentally friendly breather valve, comprising a cylinder (1), wherein a positive pressure valve chamber (11) is installed at the top of the cylinder (1), and a negative pressure valve chamber (12) is installed on the right side of the cylinder (1), characterized in that: The top and bottom of the positive pressure valve chamber (11) and the top of the negative pressure valve chamber (12) are both provided with sealing mechanisms to prevent media leakage. The sealing mechanisms include: Valve cover (111): Valve cover (111) is provided at the top and bottom of the positive pressure valve chamber (11) and the top of the negative pressure valve chamber (12). The bottom of the valve cover (111) located at the bottom of the positive pressure valve chamber (11) is fixedly connected to the top of the cylinder (1). A connecting block (112) is fixedly connected to the top and bottom of the positive pressure valve chamber (11) and the top of the negative pressure valve chamber (12). A labyrinth groove (113) is fixedly connected to the inner wall of the connecting block (112). A locking block (114) is fixedly connected to the side of the valve cover (111) near the connecting block (112). The bottom of the locking block (114) contacts the top of the labyrinth groove (113). A gasket (115) is disposed between the valve cover (111) and the connecting block (112), and the valve cover (111), the gasket (115) and the connecting block (112) are fixedly connected by a number of bolts.

2. The low-leakage environmentally friendly breather valve according to claim 1, characterized in that, A connecting pipe (13) is fixedly connected to the left side of the positive pressure valve chamber (11), and a flange (131) is fixedly connected to the left side of the connecting pipe (13) and the bottom of the cylinder (1).

3. The low-leakage environmentally friendly breather valve according to claim 2, characterized in that, The flange (131) conforms to the HG / T20592-2009 standard, the flange face type is TT1, the nominal diameter is DN100, the specifications of the cylinder (1) are φ114.3×183, the wall thickness is S=4mm, and the material is 304 stainless steel.

4. The low-leakage environmentally friendly breather valve according to claim 1, characterized in that, A filter element (14) is provided on the inner wall of the cylinder (1) near the bottom.

5. The low-leakage environmentally friendly breather valve according to claim 4, characterized in that, A fine filter screen (141) is fixedly connected to the top of the filter element (14), and a coarse filter screen (142) is fixedly connected to the bottom of the filter element (14).

6. The low-leakage environmentally friendly breather valve according to claim 4, characterized in that, Four support blocks (143) are fixedly connected to the inner wall of the cylinder (1) near the bottom of the filter element (14), and the support blocks (143) are fixedly connected to the filter element (14) by bolts.

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