Emergency pressure release valve of oxygen cabin

Abstract

The utility model discloses an oxygen cabin emergency pressure release valve which comprises a valve body, a valve element and a gland, the valve element is arranged in the valve body in a penetrating mode, the valve element is positioned in the valve body through the gland, the valve element and the valve body are sealed, the valve element can rotate in the valve body, and the gland is fixedly connected to the valve body. The upper part of the valve core extends above the gland, and the lower part of the valve core extends below the valve body; a locking nut is arranged on the lower portion of the valve body, the locking nut is connected to the valve body in a threaded mode, the valve body above the locking nut is further provided with a step position used for being clamped to an oxygen cabin wall plate in a matched mode, and the pressure relief valve is installed on the oxygen cabin wall plate through matching of the step position of the valve body and the locking nut. First fan-shaped through holes are symmetrically formed in the valve core main body part in the valve body, and second fan-shaped through holes corresponding to the first fan-shaped through holes in position are formed in the valve body below the valve core main body part. According to the utility model, pressure can be released from the inside of the oxygen cabin, the inside is communicated with the outside through operation, and the oxygen cabin can be closed externally after internal pressure release and can be closed internally after external pressure release.

Description

Technical Field

[0001] The utility model belongs to the technical field of valves for oxygen chambers, and in particular relates to an emergency pressure relief valve for an oxygen chamber. Background Art

[0002] The existing pressure relief valve used in the oxygen chamber cannot be connected to the inside and outside of the oxygen chamber due to its structural setting. In this way, the pressure relief valve cannot be rotated and adjusted inside the oxygen chamber, and can only be rotated and adjusted outside the oxygen chamber to achieve pressure relief or pressure maintenance in the oxygen chamber. However, in the event of an emergency in which the pressure in the oxygen chamber is too high, the user in the oxygen chamber cannot perform pressure relief or pressure maintenance operations on the oxygen chamber, which will bring great safety hazards to the personnel in the oxygen chamber. Therefore, in view of the above problems, it is urgent to develop an emergency pressure relief valve for oxygen chambers. Utility Model Content

[0003] The utility model aims at the above problems, makes up for the deficiencies of the prior art, and provides an oxygen chamber emergency pressure relief valve.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] An oxygen chamber emergency pressure relief valve comprises a valve body, a valve core and a gland, wherein the valve core is arranged through the valve body, the valve core is positioned in the valve body by the gland, the valve core is sealed with the valve body and the valve core can rotate in the valve body, and the gland is fixedly connected to the valve body;

[0006] The upper part of the valve core extends above the gland, and the lower part of the valve core extends below the valve body;

[0007] A locking nut is provided at the lower part of the valve body, and the locking nut is threadedly connected to the valve body. The valve body above the locking nut is also provided with a stepped position for cooperating with the oxygen cabin wall plate, and the pressure relief valve is fixedly installed on the oxygen cabin wall plate through the cooperation between the stepped position of the valve body and the locking nut;

[0008] A first fan-shaped through hole is symmetrically arranged on the valve core main body part in the valve body, and a second fan-shaped through hole corresponding to the position of the first fan-shaped through hole is arranged on the valve body below the valve core main body part.

[0009] Furthermore, a first handle is clamped on the upper part of the valve core, and a second handle is clamped on the lower part of the valve core; the first handle is fixed to the upper part of the valve core through a first nut, and the second handle is fixed to the lower part of the valve core through a second nut.

[0010] Furthermore, a second gasket is provided at the contact portion between the second handle and the valve body.

[0011] Furthermore, the gland and the valve body are fixedly connected by bolts, and a first gasket is provided at the positioning and crimping position between the gland and the valve core.

[0012] Furthermore, a sealing ring is provided between the main body of the valve core and the valve body, and the valve core and the valve body are sealed by the sealing ring.

[0013] Furthermore, a gasket is provided at the stepped position of the valve body.

[0014] Furthermore, a limiting block is provided at the lower end of the first handle and matches with the upper end of the middle part of the pressure cover.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] The utility model provides an oxygen chamber emergency pressure relief valve. By improving the structure of the existing pressure relief valve, the valve body and the valve core can be reasonably installed on the oxygen chamber wall plate of the oxygen chamber, so as to meet the requirements of pressure relief inside and outside the oxygen chamber, and the internal and external controls are connected. After the internal pressure is relieved, the external part can be closed, and after the external pressure is relieved, the internal part can be closed.

[0017] In addition, the utility model can be opened quickly and is easy to operate. Pressure relief can be achieved by rotating 90 degrees. There is no need to completely unscrew the pressure relief valve to achieve the pressure relief process. The utility model can rely on the pressure relief valve itself to maintain the valve opening without relying on external force to maintain the opening of the pressure relief valve. The utility model realizes the valve opening in a progressive manner through rotation. The pressure relief process is achieved by forming a passage through the staggered relationship between the valve body and the valve core. The pressure gradually increases when opening and gradually decreases when closing. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 The utility model is a structural schematic diagram of an oxygen chamber emergency pressure relief valve.

[0019] Figure 2 It is a schematic diagram of the position structure of a first fan-shaped through hole and a second fan-shaped through hole of an oxygen cabin emergency pressure relief valve in a pressure-maintaining state according to the utility model.

[0020] Figure 3 The utility model is a schematic diagram of the position structure of the first fan-shaped through hole and the second fan-shaped through hole of an oxygen chamber emergency pressure relief valve during the process from pressure maintenance to pressure relief.

[0021] Figure 4 It is a schematic diagram of the position structure of the first fan-shaped through hole and the second fan-shaped through hole of an oxygen cabin emergency pressure relief valve in a fully pressure-relief state according to the utility model.

[0022] Figure 5 The utility model is a schematic diagram of the initial limit structure of the limit block on the first handle of the valve core of the oxygen cabin emergency pressure relief valve.

[0023] Figure 6 This is a structural schematic diagram of a limit block on a first handle of a valve core of an oxygen chamber emergency pressure relief valve according to the utility model rotated 45 degrees counterclockwise.

[0024] Markings in the figure: 1 is the first nut, 2 is the first handle, 3 is the bolt, 4 is the pressure cover, 5 is the valve body, 6 is the valve core, 7 is the sealing ring, 8 is the gasket, 9 is the locking nut, 10 is the second handle, 11 is the second nut, 12 is the first gasket, 13 is the second gasket, 14 is the first fan-shaped through hole, 15 is the second fan-shaped through hole, 16 is the step position, and 17 is the limit block. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] Reference Figure 1 and Figure 2 The utility model provides an oxygen cabin emergency pressure relief valve, including a valve body 5, a valve core 6 and a gland 4. The valve core 6 is arranged in the valve body 5, and the valve core 6 is positioned in the valve body 5 by the gland 4. The valve core 6 and the valve body 5 are sealed and the valve core 6 can rotate in the valve body 5. The gland 4 is fixedly connected to the valve body 5; the upper part of the valve core 6 extends above the gland 4, and the lower part of the valve core 6 extends below the valve body 5; the lower part of the valve body 5 is provided with a locking nut 9, and the lock nut 9 is provided on the lower part of the valve body 5. The locking nut 9 is threadedly connected to the valve body 5. The valve body 5 above the locking nut 9 is also provided with a stepped position 16 for cooperating with the oxygen cabin wall plate. The pressure relief valve is fixedly installed on the oxygen cabin wall plate through the cooperation between the stepped position 16 of the valve body 5 and the locking nut 9; the main body of the valve core 6 in the valve body 5 is symmetrically provided with a first fan-shaped through hole 14, and the valve body 5 below the main body of the valve core 6 is provided with a second fan-shaped through hole 15 corresponding to the position of the first fan-shaped through hole 14.

[0027] The first handle 2 is clamped on the upper part of the valve core 6, and the second handle 10 is clamped on the lower part of the valve core 6; the first handle 2 is fixed to the upper part of the valve core 6 through the first nut 1, and the second handle 10 is fixed to the lower part of the valve core 6 through the second nut 11. Specifically, the first nut 1 and the second nut 11 are both I-type hexagonal nuts.

[0028] Specifically, a second gasket 13 is disposed at the contact portion between the second handle 10 and the valve body 5 , and the second gasket 13 is a polytetrafluoroethylene gasket.

[0029] Specifically, the gland 4 and the valve body 5 are fixedly connected by bolts 3, and a first gasket 12 is provided at the positioning and crimping position between the gland 4 and the valve core 6; the first gasket 12 is a polytetrafluoroethylene gasket, and the bolts 3 are hexagon socket countersunk bolts.

[0030] Specifically, a sealing ring 7 is arranged between the main part of the valve core 6 and the valve body 5, and the valve core 6 and the valve body 5 are sealed by the sealing ring 7; the sealing ring 7 is embedded in the groove on the side of the main part of the valve core 6, and two upper and lower sealing rings 7 are arranged on the side of the main part of the valve core 6.

[0031] Specifically, a gasket 8 is provided at the step position 16 of the valve body 5 , and the gasket 8 is a silicone gasket.

[0032] Specifically, a limit block 17 is disposed at the lower end of the first handle 2 and matches with the upper end of the middle portion of the pressure cover 4 . The limit block 17 can limit the rotation angle of the valve core 6 .

[0033] In combination with the technical solution and the accompanying drawings of the utility model, the installation and use process are explained: first, the pressure relief valve when the first handle 2 is installed but the second handle 10 is not installed, passes through the oxygen cabin wall plate and is clamped on the oxygen cabin wall plate through the step position 16, then the valve body 5 is locked and fixed on the oxygen cabin wall plate through the locking nut 9, and finally the second handle 10 is installed. When in use, by rotating the first handle 2 and the second handle 10 inside and outside the oxygen cabin respectively, the valve core 6 can be driven to rotate together, and the valve body 5 is fixedly mounted on the oxygen cabin wall plate, and the pressure relief process is realized by misaligning the two first fan-shaped through holes 14 on the valve core 6 and the two second fan-shaped through holes 15 on the valve body 5; specifically, as Figures 2 to 4 As shown, Figure 2 The positions of the first fan-shaped through hole 14 on the valve core 6 and the second fan-shaped through hole 15 on the valve body 5 shown in the figure are the positions under the pressure-maintaining state. Rotate 90 degrees counterclockwise in the direction of the arrow to release the pressure, and then rotate 90 degrees clockwise to return to the pressure-maintaining state. Figure 3 The shaded part in the figure is the opening area of ​​the pressure relief valve. As the rotation angle of the valve core 6 increases, the opening area increases until it is fully opened. Figure 4 When the valve core 6 of the pressure relief valve is manipulated by the first handle 2 and the second handle 10 inside and outside the oxygen chamber, the valve core 6 is rotated, and the limit block 17 limits the rotation angle of the valve core 6. Figure 5 and Figure 6 As shown, the shaded part is the limit block 17. As the valve core 6 rotates to an opening angle, the limit block 17 moves until it rotates 90 degrees, and then the limit block 17 stops moving.

[0034] In addition, the first handle 2 and the second handle 10 of the utility model can be replaced and adjusted according to the color of the appearance of the oxygen chamber, so that the pressure relief valve of the utility model is integrated with the oxygen chamber.

[0035] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art may still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. An oxygen chamber emergency pressure relief valve, characterized in that: The invention comprises a valve body, a valve core and a pressure cover, wherein the valve core is arranged through the valve body, the valve core is positioned in the valve body by the pressure cover, the valve core and the valve body are sealed and the valve core can rotate in the valve body, and the pressure cover is fixedly connected to the valve body; the upper part of the valve core extends above the pressure cover, and the lower part of the valve core extends below the valve body; a locking nut is arranged at the lower part of the valve body, and the locking nut is threadedly connected to the valve body, and the valve body above the locking nut is also provided with a stepped position for matching and clamping on the oxygen cabin wall plate, and the pressure relief valve is fixedly mounted on the oxygen cabin wall plate through the cooperation of the stepped position of the valve body and the locking nut; a first fan-shaped through hole is symmetrically arranged on the main body part of the valve core in the valve body, and a second fan-shaped through hole corresponding to the position of the first fan-shaped through hole is arranged on the valve body below the main body part of the valve core 2. An oxygen chamber emergency pressure relief valve according to claim 1, characterized in that: The upper part of the valve core is clamped with a first handle, and the lower part of the valve core is clamped with a second handle; the first handle is fixed to the upper part of the valve core through a first nut, and the second handle is fixed to the lower part of the valve core through a second nut.

3. An oxygen chamber emergency pressure relief valve according to claim 2, characterized in that: A second gasket is provided at the contact portion between the second handle and the valve body.

4. The oxygen chamber emergency pressure relief valve according to claim 1, characterized in that: The gland and the valve body are fixedly connected by bolts, and a first gasket is provided at the positioning and pressing position between the gland and the valve core.

5. The oxygen chamber emergency pressure relief valve according to claim 1, characterized in that: A sealing ring is arranged between the main body of the valve core and the valve body, and the valve core and the valve body are sealed by the sealing ring.

6. An oxygen chamber emergency pressure relief valve according to claim 1, characterized in that: A gasket is arranged at the stepped position of the valve body.

7. An oxygen chamber emergency pressure relief valve according to claim 2, characterized in that: The lower end of the first handle is provided with a limiting block matched with the upper end of the middle part of the pressure cover.

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