Novel household oxygen generator pressure reducing valve

Abstract

The utility model discloses a novel pressure reducing valve of a household oxygen generator. The novel pressure reducing valve is mainly characterized in that a lower shell assembly is in threaded connection with an upper shell, and then a protruding part is attached to a clamping part; a rib edge is arranged at an inner hole in the lower end of a lower shell of the lower shell assembly. The utility model has the beneficial effects that the lug boss and the clamping part are attached to each other, so that the lug boss and the clamping part are self-locked into a whole, and further, the threaded connection part of the upper shell and the lower shell assembly is not loosened. The outer diameter of the center base and the inner hole in the lower end of the lower shell are centered, the contact area between the center base and the lower shell is increased, and the center base is not prone to eccentricity. Meanwhile, the contact area of the central seat at the rib edge and the inner arc of the central seat is reduced, so that the central seat can slide at the rib edge and the inner arc of the central seat without unsmooth phenomenon. In addition, the effect that the center seat resists the counter-acting force of the spring is enhanced, and the center seat is not prone to compression.

Description

Technical Field

[0001] The utility model relates to a pressure reducing valve, in particular to a novel pressure reducing valve for a household oxygen concentrator. Background Art

[0002] The Chinese utility model patent with the authorization announcement number CN212804418U discloses a new type of pressure reducing valve for household oxygen concentrators, which reveals that: when oxygen flows into the air inlet connector body, the center seat is pushed open by pressure, the pressure stabilizing spring is compressed downward, and the center axis slides in the through hole of the lower shell, so that the gas enters the inner cavity of the upper shell and the lower shell assembly. After the pressure range adjusted by the pressure regulating assembly is slightly compensated by the diaphragm flexibility, the pressure stabilizing output is achieved through the exhaust connector, overcoming the problem that the prior art is affected by the manufacturing accuracy of the threads, the gap between the threads causes eccentricity, which makes the center axis not vertical, and cannot maintain continuous pressure stabilization, affecting the oxygen delivery amount.

[0003] After this structure was put on the market, the following shortcomings existed: when the air pressure pushed open the center seat of the pressure stabilizing assembly, the center seat was covered by four arc-shaped guide plates in the inner hole of the air inlet joint body, and at the same time, the center seat slid in the inner hole of the air inlet joint body and was compressed by the reaction force of the spring. Therefore, the center seat did not slide smoothly in the inner hole of the air inlet joint body, causing it to be eccentric in the pressure stabilizing assembly, which was not conducive to the pressure-stabilizing output of the gas.

[0004] At the same time, since the center seat does not slide smoothly in the inner hole of the air inlet joint, the gas in the pressure reducing valve cavity cannot be discharged smoothly, which will cause instantaneous pressure buildup and instantaneous large flow discharge. Since the upper shell and lower shell of the pressure reducing valve are connected by threads, this instantaneous pressure buildup and instantaneous large flow discharge will generate vibration and overcome the screw connection force of the thread to loosen the connection between the upper and lower shells.

[0005] To this end, the utility model proposes a novel pressure reducing valve for a household oxygen concentrator. Utility Model Content

[0006] The purpose of the utility model is to overcome the deficiencies in the prior art and provide a novel pressure reducing valve for a household oxygen concentrator.

[0007] In order to overcome the above technical problems, the technical solution adopted by the utility model is:

[0008] It includes a pressure regulating assembly, a lower shell assembly, an upper shell connected to the lower shell assembly by threads, a pressure stabilizing assembly arranged in the center of the lower shell assembly, a diaphragm arranged between the lower shell assembly and the upper shell, a sealing ring arranged on the upper end surface of the diaphragm and connected to the upper shell, a diaphragm fixing body arranged in the large hole of the stepped hole of the diaphragm, and a diaphragm support connected to the diaphragm fixing body, the diaphragm support being connected to the upper end surface of the diaphragm, one end of the pressure regulating assembly being connected to the outer diameter of the core of the diaphragm support, and the other end of the pressure regulating assembly being installed outside the upper shell through the interior of the upper shell, characterized in that: a protrusion is arranged at the upper end surface of the lower shell of the lower shell assembly, a clamping portion is arranged at the lower end surface of the upper shell, and the protrusion fits with the clamping portion after the lower shell assembly is connected to the upper shell by threads; a rib is arranged at the inner hole at the lower end of the lower shell of the lower shell assembly.

[0009] Furthermore, a concave surface is provided on the lower end surface of the lower shell of the lower shell assembly, and there are two concave surfaces, which are symmetrically arranged along the center line of the lower shell.

[0010] Furthermore, there are two protrusions, and each protrusion corresponds to the position of the concave surface of the lower end surface of the lower shell.

[0011] Furthermore, there are a plurality of the clamping parts, which are arranged in an array on the lower end surface of the upper shell body with the axis of the upper shell body as a reference.

[0012] Furthermore, there are four ribs, which are arrayed at the lower end inner hole of the lower shell body with the center of the circle of the lower end inner hole of the lower shell body as a reference.

[0013] Furthermore, the inner contour of the rib edge is an inner arc, and the arc is concentric with the center of the inner hole at the lower end of the lower shell.

[0014] Furthermore, the outer wall of the limiting groove of the air inlet joint body of the lower shell is a rectangular outline, and the corners of the rectangular outline are transitioned by small arcs.

[0015] Furthermore, the raised portion is provided with a sloped surface.

[0016] Furthermore, the clamping portion is provided with a slope surface.

[0017] Compared with the prior art, the beneficial effect is that after the lower shell assembly is threadedly connected to the upper shell, the protrusion and the clamping part fit together, so that the protrusion and the clamping part are self-locked as a whole, thereby preventing the threaded connection between the upper shell assembly and the lower shell assembly from loosening.

[0018] The outer diameter of the center seat and the inner hole at the lower end of the lower shell are centered to increase the contact area between the two, making it difficult for the center seat to be eccentric. At the same time, the contact area of ​​the center seat at the rib edge and the inner arc of the center seat is reduced, so that the center seat can slide smoothly at the rib edge and the inner arc of the center seat. In addition, the effect of the center seat resisting the reaction force of the spring is enhanced, making it difficult to compress. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0020] Figure 1 The utility model is a cross-sectional structural diagram of a novel pressure reducing valve for a household oxygen concentrator.

[0021] Figure 2 The utility model is a front view of a novel pressure reducing valve for a household oxygen concentrator.

[0022] Figure 3 yes Figure 2 Shown is a partial enlarged view of area B.

[0023] Figure 4 It is the front view of the lower shell of the utility model.

[0024] Figure 5 yes Figure 4 Left view of .

[0025] Figure 6 yes Figure 4 Top view of the .

[0026] Figure 7 yes Figure 6 Shown is a cross-sectional view along line AA.

[0027] Figure 8 yes Figure 4 Bottom view of .

[0028] Fig. 9 It is a three-dimensional diagram of the upper shell of the utility model.

[0029] Description of Reference Numerals

[0030] 1-upper shell; 2-pressure regulating assembly; 3-diaphragm fixing body; 4-diaphragm support; 5-diaphragm; 6-sealing ring; 7-lower shell assembly; 8-pressure stabilizing assembly; 9-protrusion; 10-clamping part; 11-rib edge; 12-concave surface; 13-inner arc; 14-limiting groove of air inlet joint body; 15-rectangular outline; 16-slope surface; DETAILED DESCRIPTION

[0031] Figure 1-9As shown, a novel pressure reducing valve for household oxygen concentrator is provided, comprising a pressure regulating assembly 2, a lower housing assembly 7, an upper housing 1 connected to the lower housing assembly 7 by threads, a pressure stabilizing assembly 8 arranged at the center of the lower housing assembly 7, a diaphragm 5 arranged between the lower housing assembly 7 and the upper housing 1, a sealing ring 6 arranged on the upper end surface of the diaphragm 5 and connected to the upper housing 1, a diaphragm fixing body 3 arranged in a large hole of the stepped hole of the diaphragm 5, a diaphragm supporting member 4 connected to the diaphragm fixing body 3, the diaphragm supporting member 4 connected to the upper end surface of the diaphragm 5, one end of the pressure regulating assembly 2 is connected to the outer diameter of the core of the diaphragm supporting member 4, and the other end of the pressure regulating assembly passes through the upper housing 1 is installed outside the upper shell body. In order to overcome the problem in the prior art that the gas in the pressure reducing valve cavity cannot be discharged smoothly, which will cause instantaneous pressure holding and instantaneous large flow discharge, resulting in vibration that overcomes the screw connection force of the thread to cause the connection between the upper and lower shell bodies to loosen, a protrusion 9 is provided at the upper end surface of the lower shell body of the lower shell body assembly 7, and a clamping portion 10 is provided at the lower end surface of the upper shell body 1. After the lower shell body assembly 7 is connected to the upper shell body 1 through threads, the protrusion 9 and the clamping portion 10 are fitted together, so that the protrusion 9 and the clamping portion 10 are self-locked as a whole, thereby preventing the threaded connection between the upper shell body 1 and the lower shell body assembly from loosening.

[0032] This technical effect is achieved specifically as follows:

[0033] like Figure 4 , Figure 8 As shown, a concave surface 12 is provided on the lower end surface of the lower shell of the lower shell assembly 7. There are two concave surfaces 12, and the concave surfaces 12 are symmetrically arranged along the center line of the lower shell.

[0034] like Figure 4 As shown, there are two protrusions 9, and each protrusion 9 corresponds to the position of the concave surface 12 on the lower end surface of the lower shell.

[0035] like Fig. 9 As shown, there are a plurality of clamping parts 10 , which are arranged in an array at the lower end surface of the upper shell 1 based on the axis of the upper shell 1 , and the clamping parts 10 are provided with a slope surface 16 .

[0036] like Figure 5 As shown, the protrusion 9 is provided with a ramp surface 16 .

[0037] When the thread of the lower shell of the lower shell assembly is screwed and connected with the thread of the upper shell, the slope surface 16 of the raised part 9 of the lower shell begins to contact and rub with the slope surface 16 of the upper shell, indicating that the screwing length of the thread of the lower shell and the thread of the upper shell is close to the limit state. As the two continue to be screwed together, since the lower end surface of the lower shell is provided with a concave surface 12, the thickness direction of the lower end of the lower shell is thinned by the concave surface 12. Therefore, when the slope surface 16 of the raised part 9 of the lower shell rubs over the slope surface 16 of the upper shell, elasticity begins to be generated at the concave surface 12. Through the elasticity generated, the slope surface of the raised part 9 of the lower shell eventually passes over the slope surface 16 of the clamping part 10. After that, the thickness direction of the lower end of the lower shell at the concave surface 12 is reset, thereby realizing that the raised part 9 and the clamping part 10 fit after the lower shell assembly 7 is screwed and connected with the upper shell 1, and self-locking is achieved. There are several clamping parts 10 and two protruding parts 9, which are also symmetrically arranged along the center line of the lower shell. Therefore, it is easier to achieve the termination of the screwing length of the lower shell and the upper shell reaching the limit position.

[0038] In order to overcome the problem in the prior art that the center seat does not slide smoothly in the inner hole of the air inlet joint body, resulting in the gas in the pressure reducing valve cavity not being discharged smoothly, a rib 11 is provided at the inner hole of the lower end of the lower shell of the lower shell assembly 7, such as Figure 7 shown.

[0039] like Figure 7 , Figure 8 As shown, there are four ribs 11, which are arrayed at the lower inner hole of the lower shell, based on the center of the circle of the lower inner hole of the lower shell. The inner contour of the rib 11 is an inner arc 13, and the inner arc 13 is concentric with the center of the circle of the lower inner hole of the lower shell. In this way, after the center seat is placed in the lower inner hole of the lower shell, the outer diameter of the center seat is centered with the lower inner hole of the lower shell, and the center seat is guided by the inner arc 13 of the rib 11 and the lower inner hole of the shell, so that the center seat can slide along the rib 11.

[0040] Therefore, the center seat is not easy to be eccentric by centering the outer diameter of the center seat with the inner hole of the lower end of the lower shell, because the contact area between the two is increased. At the same time, the center seat can slide smoothly on the rib edge 11 and the inner arc 13 of the center seat, because the contact area of ​​the center seat on the rib edge 11 and the inner arc 13 of the center seat is reduced, thereby ensuring the stable pressure output of the gas. In addition, the effect of the center seat resisting the reaction force of the spring is enhanced, making it less likely to be compressed.

[0041] In this embodiment, the outer wall 15 of the limiting groove 14 of the air intake connector body of the lower shell is a rectangular outline, and the corners of the rectangular outline are transitioned by small arcs. This structural improvement makes the limiting groove 14 more secure, and the limiting groove 14 will not break when the air intake connector body is placed.

[0042] The present invention is not limited to the precise structure described above and shown in the drawings, and various modifications and changes can be made without departing from its scope. The scope of the present invention is limited only by the appended claims.

Claims

1. A novel pressure reducing valve for a household oxygen concentrator, comprising a pressure regulating assembly (2), a lower shell assembly (7), an upper shell (1) connected to the lower shell assembly (7) by threads, a pressure stabilizing assembly (8) arranged at the center of the lower shell assembly (7), a diaphragm (5) arranged between the lower shell assembly (7) and the upper shell (1), a sealing ring (6) arranged on the upper end surface of the diaphragm (5) and connected to the upper shell (1), a diaphragm fixing body (3) arranged in a large hole of the stepped hole of the diaphragm (5), and a diaphragm support member (4) connected to the diaphragm fixing body (3), wherein the diaphragm support member (4) is connected to the upper end surface of the diaphragm (5), one end of the pressure regulating assembly (2) is connected to the outer diameter of the core of the diaphragm support member (4), and the other end of the pressure regulating assembly passes through the interior of the upper shell (1) and is installed outside the upper shell, characterized in that: A protrusion (9) is provided at the upper end surface of the lower shell of the lower shell assembly (7), and a clamping portion (10) is provided at the lower end surface of the upper shell (1); after the lower shell assembly (7) and the upper shell (1) are connected by threads, the protrusion (9) and the clamping portion (10) fit together; and a rib edge (11) is provided at the inner hole at the lower end of the lower shell of the lower shell assembly (7).

2. A novel pressure reducing valve for household oxygen concentrator according to claim 1, characterized in that: A concave surface (12) is provided on the lower end surface of the lower shell of the lower shell assembly (7), and the concave surfaces (12) are provided at two locations, and the concave surfaces (12) are symmetrically arranged along the center line of the lower shell.

3. A novel pressure reducing valve for household oxygen concentrator according to claim 1, characterized in that: There are two protrusions (9), and each protrusion (9) corresponds to the position of the concave surface (12) on the lower end surface of the lower shell.

4. A novel pressure reducing valve for household oxygen concentrator according to claim 1, characterized in that: The clamping parts (10) are in a plurality and are arranged in an array on the lower end surface of the upper shell (1) based on the axis of the upper shell (1).

5. A novel pressure reducing valve for household oxygen concentrator according to claim 1, characterized in that: There are four ribs (11), which are arranged in an array at the inner hole at the lower end of the lower shell body, with the center of the circle of the inner hole at the lower end of the lower shell body as a reference.

6. A novel pressure reducing valve for household oxygen concentrator according to claim 1, characterized in that: The inner contour of the rib edge (11) is an inner arc (13), and the arc (13) is concentric with the center of the inner hole at the lower end of the lower shell.

7. A novel pressure reducing valve for household oxygen concentrator according to claim 1, characterized in that: The outer wall (15) of the limiting groove (14) of the air inlet joint body of the lower shell is a rectangular outline, and the corners of the rectangular outline are transitioned by small arcs.

8. A novel pressure reducing valve for household oxygen concentrator according to claim 1, characterized in that: The raised portion (9) is provided with a slope surface (16).

9. A novel pressure reducing valve for household oxygen concentrator according to claim 1, characterized in that: The clamping portion (10) is provided with a slope surface (16).

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