Novel ultralow-leakage-rate mechanical breather valve

Abstract

The utility model relates to tank pressure control equipment, in particular to a novel ultralow-leakage-rate mechanical breather valve which comprises a valve body, a breathing tube is arranged on the side face of the valve body, a flow guide cover is sleeved on the breathing tube, and the flow guide cover is detachably connected with the breathing tube. According to the novel ultralow-leakage-rate mechanical breather valve, the detachable flow guide cover is sleeved outside the breathing tube, the novel ultralow-leakage-rate mechanical breather valve can be conveniently maintained subsequently through the detachable flow guide cover, and even an adaptive flow guide cover is replaced according to the requirement of a use environment. In the mounting structure of the flow guide cover, the flow guide cover can be basically mounted at the tail end of the breathing tube without shaking by using the screw rod and the limiting piece, the structure is simple, the mounting is convenient, and a professional tool is not needed in the mounting process.

Description

TECHNICAL FIELD

[0001] The utility model relates to tank pressure control equipment, in particular to a novel ultra -low leakage mechanical breathing valve. BACKGROUND

[0002] The function of the all-weather breathing valve is to prevent harmful gases or vapors from escaping from the breather pipe under any weather conditions. This valve can adapt to certain temperature and pressure environments and has an automatic adjustment function to maintain the sealing performance of the gas. The all-weather breathing valve is usually used in toxic and harmful, flammable and explosive, corrosive working environment, such as oil refinery, chemical enterprise, pharmaceutical factory, solvent factory, oil depot and other industrial places where there are toxic and harmful, flammable and explosive medium.

[0003] The breathing valve in the prior art generally opens the breathing pipe opening on the side, and the flow guide cover is installed outside the breathing pipe. In order to avoid foreign matter entering the breathing pipe, a filter disc is generally arranged at the opening of the breathing pipe, which can prevent the entry of impurities larger than the filter size into the main body of the breathing valve. However, the general breathing valve adopts a welded flow guide cover, which basically has no ability to maintain the filter disc, such as replacing the breathing valve at high cost, so a breathing valve which is easy to disassemble and maintain is needed. SUMMARY

[0004] To solve the above problems, the utility model provides a novel ultra -low leakage mechanical breathing valve, the novel ultra -low leakage mechanical breathing valve sets up detachable structure at the flow guide cover, and the filter disc maintenance is convenient.

[0005] To achieve the above purpose, the utility model adopts the technical scheme of:

[0006] A novel ultra -low leakage mechanical breathing valve, including the valve body, the side surface of the valve body has a breathing pipe, the breathing pipe is installed with the flow guide cover, the flow guide cover is detachable with breathing pipe connection.

[0007] As preferred, the end face of the breathing pipe away from the valve body is installed with a plurality of screw rods;

[0008] The flow guide cover is provided with a connecting opening for sleeving the breathing pipe on one side, the shape of the connecting opening is consistent with the outer peripheral shape of the breathing pipe, and a through hole is formed on the side of the flow guide cover corresponding to the breathing opening.

[0009] When the flow guide cover is sleeved at the end of the breathing pipe through the connecting opening, the screw rod is inserted into the through hole and fixed by the nut.

[0010] As preferred, the flow guide cover and the outer wall of the breathing pipe are connected with a limiting piece for limiting the installation depth of the flow guide cover.

[0011] Preferably, the limiting member is installed on the inner wall of the flow guide cover and is adjacent to the connecting opening.

[0012] Preferably, the limiting member is in a "Z" shape structure.

[0013] Preferably, the limiting member is a thin-walled metal member.

[0014] Preferably, the end bending section of the limiting member abuts against the free end surface of the breathing pipe.

[0015] Preferably, the tail of the limiting member is welded to the inner wall of the flow guide cover.

[0016] The beneficial effects of the present application are as follows:

[0017] The present application has the beneficial effects that: BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 Fig. 1 is a structural schematic view of the novel ultra-low leakage mechanical breathing valve of the present application.

[0019] Figure 2 Fig. 2 is a structural schematic view of the flow guide cover of the present application. Figure 1

[0020] Fig. 3 is a structural schematic view of the internal structure of the novel ultra-low leakage mechanical breathing valve of the present application without the upper valve body and the flow guide cover. Figure 3 The reference signs include:

[0021] 1 - lower valve body, 2 - upper valve body, 3 - connecting flange, 4 - valve cover, 41 - guide structure, 5 - breathing pipe, 6 - flow guide cover, 61 - limiting member, 62 - screw rod, 63 - nut, 7 - valve seat member, 71 - bracket, 72 - lower valve seat, 73 - side communication port, 74 - upper valve seat, 81 - lower valve disc, 82 - lower guide rod, 83 - upper valve disc, 84 - upper guide rod.

[0022] DETAILED DESCRIPTION In order to make the purpose, technical scheme and advantages of the present application more clear and explicit, the present application will be further described in detail below with reference to specific embodiments. It should be understood that these descriptions are only exemplary and are not intended to limit the scope of the present application.

[0023] In order to make the purpose, technical scheme and advantages of the present application more clear and explicit, the present application will be further described in detail below with reference to specific embodiments. It should be understood that these descriptions are only exemplary and are not intended to limit the scope of the present application.

[0024] To address the issue that existing ultra-low leakage mechanical breather valves employ welded baffles (6), which offer virtually no maintenance capability for the filter disc, such as... Figure 1 As shown, this embodiment proposes a novel ultra-low leakage mechanical breathing valve, including a valve body, a breathing tube 5 on the side of the valve body, a flow guide 6 fitted on the breathing tube 5, and the flow guide 6 and the breathing tube 5 are detachably connected.

[0025] Specifically, the basic structure of this novel ultra-low leakage mechanical breather valve consists of a hollow cup-shaped lower valve body 1 and a tubular upper valve body 2, wherein the upper valve body 2 and the lower valve body 1 are sealed together. At the bottom of the lower valve body 1 is a connecting flange 3, which is used to connect the lower valve body 1 to the tank. The top of the upper valve body 2 is provided with a valve cover 4, and the upper valve body 2 is connected to the valve cover 4 through the flange structure. A breather tube 5 communicating with the internal space of the upper valve body 2 is provided on the side of the upper valve body 2. A flow guide 6 is detachably connected to the end of the breather tube 5 away from the upper valve body 2.

[0026] like Figure 2 As shown, to facilitate a more convenient and secure fixation of the air guide 6, three screws 62 are installed on the end face of the breathing tube 5 away from the valve body. One side of the air guide 6 has a connection opening for mounting the breathing tube 5; the shape of this connection opening matches the outer circumference of the breathing tube 5. A through hole is provided on the side of the air guide 6 corresponding to the breathing opening. When the air guide 6 is fitted onto the end of the breathing tube 5 through the connection opening, the screws 62 are inserted into the through hole and secured with nuts 63. Thus, through the screws 62 and the insertion into the through hole of the air guide 6, the air guide 6 will not detach from the breathing tube 5.

[0027] To further limit the movement of the hood 6 toward the breathing tube 5, in this embodiment, three limiting members 61 are installed around the inner wall of the hood 6 near the connection opening. In this embodiment, the limiting member 61 is a "Z"-shaped thin-walled metal structure, wherein one bent section of the limiting member 61 is welded to the inner wall of the hood 6, the middle bent section of the limiting member is near the outer wall of the breathing tube 5, and the other bent section of the limiting member abuts against the end wall of the breathing tube 5.

[0028] The above-mentioned use of nut 63 and limiting member 61 allows the flow guide 6 to be restricted to a position outside the breathing tube 5, preventing the flow guide 6 from moving along the axial direction of the breathing tube 5.

[0029] Because the limiting member 61 is a "Z"-shaped thin-walled metal structure, and due to its own plasticity, the limiting member 61 can provide a certain pre-tightening capacity within a limited range, further stabilizing the installation effect of the guide shield 6, while also preventing the nut 63 from loosening its connection with the screw 62.

[0030] The connection structure of the breathing pipe 5 and the flow guide cover 6 in the new type mechanical breathing valve with ultra-low leakage can be adapted to most of the new type mechanical breathing valves with ultra-low leakage in the prior art, and the main body structure of the new type mechanical breathing valve with ultra-low leakage is not limited in the embodiment.

[0031] As shown in Figure 3 In the embodiment, the valve body 2 is further provided with a valve seat piece 7, the main body of the valve seat piece 7 is a box body structure, a side communication port 73 is formed in the side surface of the valve seat piece 7, the valve seat piece 7 has a top end surface and a bottom end surface, the top plate of the valve seat piece 7 is provided with an upper valve seat 74, the bottom plate of the valve seat piece 7 is a lower valve seat 72, a support 71 is further provided at the bottom of the valve seat piece 7, and the middle part of the support 71 has a hollow passage. A lower valve disc 81 and an upper valve disc 83 are respectively installed on the upper valve seat 74 and the lower valve seat 72, a lower guide rod 82 is installed at the center of the lower valve disc 81, and the lower guide rod 82 extends downward below the lower valve disc 81 and passes through the passage in the support 71. Similarly, an upper guide rod 84 is arranged at the center of the upper valve disc 83, the upper guide rod 84 vertically extends upward above the upper valve disc 83, a tubular guide structure 41 is arranged at the position corresponding to the upper guide rod 84 of the valve cover 4, and the upper guide rod 84 is inserted into the guide structure 41. The side communication port 73 formed in the side surface of the valve seat piece 7 is in communication with the breathing pipe 5.

[0032] The valve body structure described above is an example of the main body of the new type mechanical breathing valve with ultra-low leakage in the embodiment, and the main body of the new type mechanical breathing valve with ultra-low leakage in the embodiment can be more sensitive to complete the internal pressure control of the tank body, complete the breathing action, and balance the internal air pressure of the tank body within a preset range.

[0033] In some feasible embodiments, the connection mode of the breathing pipe 5 and the flow guide cover 6 of the new type mechanical breathing valve with ultra-low leakage is especially suitable for DN150 and DN300 specifications of the new type mechanical breathing valve with ultra-low leakage.

[0034] The above is only a preferred embodiment of the present application, and for those skilled in the art, many changes can be made in the specific implementation and application range according to the technical content of the present application, as long as these changes do not deviate from the concept of the present application, and all belong to the protection scope of the present patent.

Claims

1. A new type of ultra-low emission mechanical breather valve comprising a valve body, the side of the valve body having a breather tube, characterized in that: The breathing pipe is sleeved with a flow guide cover, and the flow guide cover is detachably connected with the breathing pipe; A plurality of screw rods are installed on the end surface of the breathing pipe away from the valve body; A connecting opening for sleeving the breathing pipe is arranged on one side of the flow guide cover, the shape of the connecting opening is consistent with the outer peripheral shape of the breathing pipe, and a through hole is formed on the side of the flow guide cover corresponding to the breathing opening; When the flow guide cover is sleeved on the end of the breathing pipe through the connecting opening, the screw rods are inserted into the through hole and fixed by nuts.

2. The new ultra-low emission mechanical breather valve according to claim 1, characterized in that: A limiting piece for limiting the installation depth of the flow guide cover is connected between the flow guide cover and the outer wall of the breathing pipe.

3. The new ultra-low emission mechanical breather valve according to claim 2, characterized in that: The limiting piece is installed on the inner wall of the flow guide cover and is adjacent to the connecting opening.

4. The new ultra-low emission mechanical breather valve according to claim 2, characterized in that: The limiting piece is in a "Z" shape structure.

5. The novel ultra-low emission mechanical breather valve according to claim 4, wherein: The limiting piece is a thin-walled metal piece.

6. The new ultra-low emission mechanical breather valve according to claim 4, characterized in that: The end bending section of the limiting piece abuts against the free end surface of the breathing pipe.

7. The new ultra-low emission mechanical breather valve according to claim 4, characterized in that: The tail of the limiting piece is welded to the inner wall of the flow guide cover.

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