Oxygen generator pressure release valve

Abstract

The pressure release valve comprises an upper shell and a lower shell, the upper shell and the lower shell are connected through threads, a supporting pad is arranged on the inner wall of the upper shell in an attached mode, an inner screw hole is formed in the inner wall of one side of the lower shell, a circular groove is fixedly connected to the inner wall of the same side of the lower shell, and the lower shell is fixedly connected with the circular groove. The inner screw hole is formed in the circular groove, a clamping seat is engaged in the inner screw hole, an inner supporting plate is fixedly connected to one end of the clamping seat, an ejector pin movably penetrates through the center position of the inner supporting plate in a penetrating mode, one end of the ejector pin is attached to the supporting pad, a pressure-resistant plate is attached to the other end of the ejector pin, and the periphery of the pressure-resistant plate is sleeved with a rubber ring. One side of the rubber ring is fixedly connected with a first spring, the other end of the first spring abuts against the inner side of the lower shell, and the oxygen generator pressure release valve has the advantages that the damage probability of the rubber ring is reduced, the service life of the pressure release valve is guaranteed, and the maintenance frequency is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to pressure relief valve technical field especially relates to a kind of oxygen generator pressure relief valve. BACKGROUND

[0002] ‌The main role of oxygen generator pressure relief valve is to protect equipment and system safety, prevent pressure too high to cause damage to equipment‌. When the internal pressure of oxygen generator exceeds the set value, pressure relief valve will automatically open, release excess pressure, so as to protect oxygen generator and related pipeline from being damaged, prevent accidents‌.

[0003] Generally, the needle in the oxygen generator pressure relief valve is set to limit the role, and the needle is directly connected with the rubber ring that plays a closing role, so that the needle will extrude the rubber ring during repeated opening and closing of the pressure relief valve, thereby causing damage to the rubber ring, affecting the service life of the pressure relief valve. UTILITY MODEL CONTENTS

[0004] The utility model discloses an oxygen generator pressure relief valve, to solve the technical problem that the needle will extrude the rubber ring during repeated opening and closing of the pressure relief valve, thereby causing damage to the rubber ring, affecting the service life of the pressure relief valve.

[0005] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0006] An oxygen generator pressure relief valve, the upper shell and the lower shell are connected by thread, and the inner wall of the upper shell is provided with a support pad, the inner wall of one side of the lower shell is provided with an internal thread hole, and the same side of the inner wall of the lower shell is fixedly connected with a circular groove, the internal thread hole is arranged in the circular groove, the internal thread hole is engaged with a clamping seat, one end of the clamping seat is fixedly connected with an inner support plate, a needle is movably inserted into the center position of the inner support plate, one end of the needle is attached to the support pad, and the other end is attached with a pressure plate, the outer periphery of the pressure plate is sleeved with a rubber ring, one side of the rubber ring is fixedly connected with a spring, the other end of the spring is abutted against the inner side of the lower shell, and the inner walls of both sides of the lower shell are tightly connected with an air inlet and an air outlet respectively.

[0007] The clamping seat is located in the internal thread hole, and the outer periphery of the clamping seat is provided with external threads, and the clamping seat is engaged with the internal thread hole through the external threads.

[0008] By setting the pressure plate, the pressure plate is arranged at the center position of the rubber ring during the entire pressure relief process of the pressure relief valve, so as to avoid direct contact between the rubber ring and the needle, thereby avoiding the extrusion of the rubber ring caused by the contact between the needle and the support pad, also avoiding the influence of the elasticity of the rubber ring on the limiting of the needle, further ensuring the service life of the entire pressure relief valve, and reducing the maintenance frequency.

[0009] In a preferred scheme, the inner wall of the top end of the upper shell is provided with a mounting groove, one side of the support pad abuts against the inner wall of the upper shell and covers the mounting groove, and a gasket is attached to the connection between the support pad and the inner wall of the upper shell;

[0010] The inner wall of the mounting groove is fixedly connected with spring two, and the other end of spring two is fixedly connected with a circular support plate, one side of the circular support plate is fixedly connected with a rubber sleeve;

[0011] One side of the rubber sleeve is connected to the inner wall of the mounting groove, and spring two is located in the rubber sleeve, and the circular support plate abuts against one side of the support pad.

[0012] By providing spring two, the rubber sleeve and the circular support plate, the central position of the support pad is supported by the circular support plate, the spring two can provide a buffering force, and the position of the spring two is limited by the rubber sleeve, so that the buffering effect of the spring two is guaranteed and the circular support plate is prevented from excessively pressing the support pad, thereby effectively prolonging the service life of the support pad.

[0013] In a preferred scheme, the outer wall of the lower shell is fixedly connected with a limiting strip, and a T-shaped swivel ring is movably connected between the limiting strip and the outer wall of the lower shell, and the T-shaped swivel ring surrounds the outer periphery of the lower shell;

[0014] The inner wall of the top end of the T-shaped swivel ring is fixedly connected with a plurality of arc-shaped clamping plates at equal intervals, and a gap is provided between each arc-shaped clamping plate, and one side of each arc-shaped clamping plate is provided with a chamfer;

[0015] The outer periphery of the upper shell is fixedly connected with a plurality of hinged rods at equal intervals, and each hinged rod is hingedly connected with an L-shaped hanger, the inner wall of the bottom end of the L-shaped hanger is provided with an arc-shaped notch, and each arc-shaped clamping plate is correspondingly clamped in the arc-shaped notch.

[0016] By providing the L-shaped hanger and the arc-shaped clamping plate, after the upper shell and the lower shell are installed, each arc-shaped clamping plate can be gradually clamped into the arc-shaped notch from the chamfer, and based on the provision of the chamfer, the arc-shaped notch and the arc-shaped clamping plate are interference clamped, thereby avoiding dislocation of the two, achieving the traction effect of the L-shaped hanger, and avoiding loosening of the connection between the upper shell and the lower shell after long-term use.

[0017] As can be known from the above, the pressure relief valve of the oxygen generator comprises an upper shell and a lower shell, the upper shell and the lower shell are connected through threads, and the inner wall of the upper shell is provided with a support pad in a matched mode; an inner screw hole is arranged on the inner wall of one side of the lower shell, and a circular groove is fixedly connected to the inner wall of the same side of the lower shell; the inner screw hole is arranged in the circular groove; a clamping seat is engaged in the inner screw hole; one end of the clamping seat is fixedly connected with an inner support plate; a thimble is movably inserted into the center of the inner support plate; one end of the thimble is attached to the support pad, and the other end is attached with a pressure-resistant plate; a rubber ring is sleeved on the outer periphery of the pressure-resistant plate; one side of the rubber ring is fixedly connected with a spring one; the other end of the spring one abuts against the inner side of the lower shell; and an air inlet and an air outlet are tightly connected to the inner walls of the two sides of the lower shell respectively. The pressure relief valve of the oxygen generator provided by the utility model has the technical effects of reducing the damage probability of the rubber ring, guaranteeing the service life of the pressure relief valve and reducing the maintenance frequency. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 The utility model provides a kind of overall appearance structure schematic diagram of pressure relief valve of oxygen generator.

[0019] Figure 2 The utility model provides a kind of internal split schematic diagram of pressure relief valve of oxygen generator.

[0020] Figure 3 The utility model provides a kind of upper shell internal structure schematic diagram of pressure relief valve of oxygen generator.

[0021] Figure 4 The utility model provides a kind of lower shell external split schematic diagram of pressure relief valve of oxygen generator.

[0022] In the drawing, 1, upper shell;2, articulated rod;3, L-shaped hanger;4, limit strip;5, lower shell;6, air inlet;7, air outlet;8, inner screw hole;9, circular groove;10, support pad;11, washer;12, inner support plate;13, thimble;14, external thread;15, clamping seat;16, rubber ring;17, spring one;18, pressure-resistant plate;19, mounting groove;20, rubber sleeve;21, spring two;22, arc-shaped notch;23, arc-shaped clamping plate;24, T-shaped swivel ring;25, chamfer;26, circular support plate. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments.

[0024] The pressure relief valve of the oxygen generator disclosed by the utility model is mainly applied to the scene of pressure relief of oxygen generator.

[0025] Refer toFigure 1 and Figure 2 The utility model provides an oxygen generator pressure relief valve, including upper casing 1 and lower casing 5, upper casing 1 and lower casing 5 are connected through thread, and the inner wall of upper casing 1 is attached with support pad 10, one side inner wall of lower casing 5 is provided with internal thread 8, and the same side inner wall of lower casing 5 is fixedly connected with circular groove 9, internal thread 8 is arranged in circular groove 9, internal thread 8 is engaged with the clamping seat 15, and one end of clamping seat 15 is fixedly connected with inner support plate 12, the center position of inner support plate 12 is movably inserted with thimble 13, and one end of thimble 13 is attached on support pad 10, the other end is attached with pressure resistance plate 18, the outer periphery of pressure resistance plate 18 is sleeved with rubber ring 16, and one side of rubber ring 16 is fixedly connected with spring one 17, the other end of spring one 17 is against the inner side of lower casing 5, and the both sides inner wall of lower casing 5 is tightly connected with air inlet 6 and exhaust port 7 respectively, the pressure relief valve is in, and air inlet 6 is admitted, exhaust port 7 is exhausted, and in high pressure environment, can push rubber ring 16 and drive spring one 17 to stretch, make rubber ring 16 separate from the junction of air inlet 6 and exhaust port 7, to realize pressure relief effect, and in the whole process, through the central position of rubber ring 16 of pressure resistance plate 18 setting, to avoid rubber ring 16 directly with thimble 13 contact, to avoid thimble 13 and support pad 10 contact directly to rubber ring 16 extrusion and cause rubber ring 16 damage, also avoided the elastic of rubber ring 16 to the limiting influence of thimble 13, further guarantee the service life of whole pressure relief valve, reduce maintenance frequency.

[0026] Refer to Figure 2 In a preferred embodiment, the clamping seat 15 is located in the internal thread 8, and the outer periphery of the clamping seat 15 is provided with external thread 14, and the clamping seat 15 is engaged with the internal thread 8 through the external thread 14.

[0027] Refer to Figure 2 In a preferred embodiment, the top end inner wall of the upper casing 1 is provided with a mounting groove 19, one side of the support pad 10 is against the inner wall of the upper casing 1, and covers the mounting groove 19, and the connecting part of the support pad 10 and the inner wall of the upper casing 1 is attached with a gasket 11.

[0028] Refer to Figure 3 In a preferred embodiment, the inner wall of the mounting groove 19 is fixedly connected with spring two 21, and the other end of the spring two 21 is fixedly connected with a circular support plate 26, one side of the circular support plate 26 is fixedly connected with a rubber sleeve 20.

[0029] Refer to Figure 3In a preferred embodiment, one side of the rubber sleeve 20 is connected to the inner wall of the mounting groove 19, and the second spring 21 is located inside the rubber sleeve 20. The circular support plate 26 abuts against one side of the support pad 10. During the opening and closing of the pressure relief valve, one end of the ejector pin 13 will repeatedly collide with the support pad 10. Under high pressure, the ejector pin 13 will be squeezed onto the support pad 10, which will eventually cause deformation of the center position of the support pad 10. The circular support plate 26 supports the center position of the support pad 10, and the second spring 21 can provide buffering force. The rubber sleeve 20 can limit the position of the second spring 21, which can ensure the buffering effect of the second spring 21 and also prevent the circular support plate 26 from excessively squeezing the support pad 10, effectively ensuring the service life of the support pad 10.

[0030] Reference Figure 4 In a preferred embodiment, a limiting strip 4 is fixedly connected to the outer wall of the lower housing 5, and a T-shaped rotating ring 24 is movably engaged between the limiting strip 4 and the outer wall of the lower housing 5, with the T-shaped rotating ring 24 surrounding the outer periphery of the lower housing 5.

[0031] Reference Figure 4 In a preferred embodiment, a plurality of arc-shaped clamping plates 23 are fixedly connected at equal intervals to the inner wall of the top end of the T-shaped swivel 24, and a gap is provided between each arc-shaped clamping plate 23. A chamfer 25 is provided on one side of each arc-shaped clamping plate 23.

[0032] Reference Figure 4 In a preferred embodiment, multiple hinge rods 2 are fixedly connected at equal intervals around the outer periphery of the upper housing 1, and each hinge rod 2 is hinged with an L-shaped bracket 3. The inner wall of the bottom end of the L-shaped bracket 3 is provided with an arc-shaped groove 22, and each arc-shaped locking plate 23 is correspondingly locked into the arc-shaped groove 22. After the upper housing 1 and the lower housing 5 are installed, each L-shaped bracket 3 can be lowered so that the inner wall of the L-shaped bracket 3 can be movably fitted against one side of the T-shaped rotating ring 24. The T-shaped rotating ring 24 is rotated so that each arc-shaped locking plate 23 is gradually locked into the arc-shaped groove 22 from the chamfer 25. Based on the setting of the chamfer 25, the arc-shaped groove 22 and the arc-shaped locking plate 23 are interference-fitted, thereby preventing the two from dislodging and realizing the traction effect of the L-shaped bracket 3, so as to avoid loosening at the connection between the upper and lower housings 1 and the lower housing 5 after long-term use.

[0033] Working principle: in the pressure relief valve, the air inlet 6, exhaust, in a high pressure environment can push the rubber ring 16 and drive the spring 17 stretch, make the rubber ring 16 separate from the air inlet 6 and the exhaust 7 junction, to realize the pressure relief effect, and in the whole process, through the pressure plate 18 is arranged in the center position of the rubber ring 16, to avoid the rubber ring 16 directly with the thimble 13 contact, thereby avoiding the thimble 13 and support pad 10 contact directly to the rubber ring 16 extrusion caused by the rubber ring 16 damage, also avoids the elasticity of the rubber ring 16 to the thimble 13 limit effect, further guarantee the service life of the whole pressure relief valve, reduce the maintenance frequency.

[0034] The above description is only the preferred embodiment of the present application, but the protection scope of the present application is not limited to this. The replacement can be the replacement of part of the structure, device, method step, or the complete technical solution. According to the technical scheme and the utility model concept of the present application, equivalent replacement or change should be covered in the protection scope of the present application.

Claims

1. An oxygen generator pressure relief valve comprising an upper housing (1) and a lower housing (5), characterized in that, The upper shell (1) and the lower shell (5) are connected by threads, and the inner wall of the upper shell (1) is provided with a support pad (10), one side of the inner wall of the lower shell (5) is provided with an internal screw hole (8), and the same side of the inner wall of the lower shell (5) is fixedly connected with a circular groove (9), the internal screw hole (8) is arranged in the circular groove (9), the internal screw hole (8) is engaged with a clamping seat (15), one end of the clamping seat (15) is fixedly connected with an inner support plate (12), the center of the inner support plate (12) is movably inserted with a thimble (13), one end of the thimble (13) is attached to the support pad (10), the other end is provided with a pressure plate (18), the outer periphery of the pressure plate (18) is sleeved with a rubber ring (16), one side of the rubber ring (16) is fixedly connected with a spring (17), the other end of the spring (17) abuts against the inner side of the lower shell (5), and the inner walls of the two sides of the lower shell (5) are respectively tightly connected with an air inlet (6) and an air outlet (7).

2. The pressure relief valve of claim 1, wherein The clamping seat (15) is located in the internal screw hole (8), and the outer periphery of the clamping seat (15) is provided with external threads (14), and the clamping seat (15) is engaged with the internal screw hole (8) through the external threads (14).

3. The pressure relief valve of claim 1, wherein, The top end inner wall of the upper shell (1) is provided with a mounting groove (19), one side of the support pad (10) abuts against the inner wall of the upper shell (1), and covers the outside of the mounting groove (19), and the connecting part of the support pad (10) and the inner wall of the upper shell (1) is attached with a gasket (11).

4. The pressure relief valve of claim 3, wherein the valve body is formed of a material having a coefficient of thermal expansion that is less than the coefficient of thermal expansion of the valve seat. The inner wall of the mounting groove (19) is fixedly connected with a spring (21), and the other end of the spring (21) is fixedly connected with a circular support plate (26), one side of the circular support plate (26) is fixedly connected with a rubber sleeve (20).

5. The pressure relief valve of claim 4, wherein the valve body is formed of a material having a coefficient of thermal expansion that is less than the coefficient of thermal expansion of the valve seat. One side of the rubber sleeve (20) is connected to the inner wall of the mounting groove (19), and the spring (21) is located in the rubber sleeve (20), and the circular support plate (26) abuts against one side of the support pad (10).

6. The pressure relief valve of claim 1, wherein, The outer wall of the lower shell (5) is fixedly connected with a limiting strip (4), and the T-shaped swivel ring (24) is movably connected between the limiting strip (4) and the outer wall of the lower shell (5), and the T-shaped swivel ring (24) surrounds the outer periphery of the lower shell (5).

7. The pressure relief valve of claim 6, wherein the valve body is formed of a material having a coefficient of thermal expansion that is less than the coefficient of thermal expansion of the valve seat. The top end inner wall of the T-shaped swivel ring (24) is fixedly connected with a plurality of arc-shaped clamping plates (23) at equal intervals, and gaps are provided between each arc-shaped clamping plate (23), and one side of each arc-shaped clamping plate (23) is provided with a chamfer (25).

8. The pressure relief valve of claim 7, wherein, The outer periphery of the upper shell (1) is fixedly connected with a plurality of hinged rods (2) at equal intervals, and each hinged rod (2) is respectively hinged with an L-shaped hanger (3), the bottom end inner wall of the L-shaped hanger (3) is respectively provided with an arc-shaped notch (22), and each arc-shaped clamping plate (23) is correspondingly clamped in the arc-shaped notch (22).

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