Exhaust venting self-sealing silicone vent valve

Abstract

The utility model discloses an exhaust valve that exhausts freely and seals automatically, which comprises a valve seat, a valve core and a gland. The valve core made of silica gel comprises a snap ring, a self-suction piece and an inner sealing gasket. The gland comprises a clamping cylinder, a clamping cylinder and a top cover. The snap ring and the clamping cylinder are connected to the valve seat. The self-suction piece covers the second ring groove and the inner ring groove of the valve seat. The inner sealing gasket is located in the inner ring groove. The diameter of the inner sealing gasket is greater than the diameter of the first exhaust hole in the inner ring groove. The thickness of the inner sealing gasket is less than the height difference between the bottom wall of the inner ring groove and the top surface of the outer ring wall of the second ring groove. The second exhaust hole is formed in the self-suction piece above the second ring groove. The bottom wall of the clamping cylinder is pressed on the top surface of the snap ring of the valve core. The top surface of the clamping cylinder protrudes from the top surface of the valve seat. The third exhaust hole is formed in the top cover. The valve core does not contact the bag film when it is sucked up, and the exhaust is smooth. The gland is high and protruding, which facilitates the accurate butt joint of the air pump.

Description

Technical Field

[0001] This utility model relates to the field of vacuum compression bags, and in particular to a self-sealing silicone exhaust valve that allows for unobstructed exhaust. Background Technology

[0002] Various types of exhaust valves are currently installed on vacuum compression bags, connecting to the inner cavity of the bag. To prevent air leakage after exhaust, the valve cap is screwed on afterward, or the air passage is blocked by pressing and bonding, all of which require further supplementary measures. The applicant designed and developed a self-sealing exhaust valve for compression bags, which was patented on May 24, 2022 (authorization announcement number: CN217348957U). It utilizes a deformable silicone valve core in conjunction with a groove on the valve seat, so that when the air inside the bag is completely evacuated, the valve core is adsorbed by negative pressure and self-seals the air passage, forming a self-sealing state without manual pressure. The compression bag has a cross-shaped hole, and the exhaust valve is located inside the bag. The upper surface of the valve seat is bonded to the inner surface of the bag around the cross-shaped hole. In actual use, when vacuuming, the silicone valve core inside the valve is sucked up and adsorbed to the bag membrane, affecting normal exhaust and making evacuation more laborious; moreover, during prolonged evacuation, the silicone valve core is sucked up to a large extent, affecting its rebound and reset; at the same time, the flat upper surface of the exhaust valve causes inaccurate pump positioning during evacuation, which also affects the evacuation effect. Utility Model Content

[0003] To address the problems existing in the prior art, this utility model provides a self-sealing silicone exhaust valve that allows for unobstructed exhaust. When the valve core is sucked up, it does not contact the bag film, ensuring unobstructed exhaust. The limiting post inside the pressure cap effectively prevents the silicone valve core from being sucked up too much, thus affecting its rebound and reset. At the same time, the high convexity of the pressure cap facilitates accurate docking with the air pump.

[0004] To achieve the above objectives, the present invention provides the following technical solution:

[0005] A self-sealing silicone exhaust valve with unobstructed venting includes a valve seat, a valve core, and a gland. The upper surface of the valve seat forms a first annular groove, a second annular groove, and an inner ring groove from the outer edge towards the center. An exhaust hole is located at the center of the inner ring groove. The top surface of the outer ring wall of the second annular groove is higher than the top surface of the inner ring wall. The silicone valve core includes a retaining ring, a self-priming plate, and an inner sealing gasket. The top surface of the retaining ring is connected to the periphery of the self-priming plate. The inner sealing gasket is located on the bottom surface of the center of the self-priming plate. The retaining ring is engaged in the first annular groove. The self-priming plate covers the second annular groove and the inner ring groove. The inner sealing gasket is located in the inner ring groove, and its diameter is smaller than that of the inner ring groove. The inner diameter of the groove is larger than the diameter of the first vent hole. The thickness of the inner sealing gasket is less than the height difference between the bottom wall of the inner groove and the top surface of the outer wall of the second groove. The self-priming plate above the second groove has a second vent hole. The cover includes a retainer, a pressure cylinder on the top surface of the retainer, and a top cover on the top surface of the pressure cylinder. The width of the first groove on the valve seat is equal to the sum of the wall thickness of the retainer of the cover and the retainer of the valve core. The retainer of the cover is fitted between the outer wall of the first groove and the outer wall of the retainer of the valve core. The bottom wall of the pressure cylinder presses against the top surface of the retainer of the valve core. The top surface of the pressure cylinder protrudes from the top surface of the valve seat. The top cover has a third vent hole.

[0006] The vacuum compression bag has a circular hole on its body. The upper surface of the valve seat of the exhaust valve is bonded to the inner surface of the bag around the circular hole. When there is air inside the bag, the self-priming plate is in a horizontal position. There is a certain gap between the bottom wall of the inner sealing gasket and the bottom wall and inner circumferential wall of the inner ring groove. There is also a gap between the bottom surface of the self-priming plate and the top surface of the inner ring wall of the second ring groove. Exhaust hole one and exhaust hole two are connected to the second ring groove through the inner ring groove, and exhaust hole three is connected to exhaust hole two, which can realize the function of removing air from the bag through exhaust hole one. When the air inside the bag is evacuated, the thin self-priming plate deforms and tilts towards the center. The bottom wall of the inner sealing gasket adheres to the bottom wall of the inner ring groove, sealing exhaust hole one. The self-priming plate above the top surface of the inner ring wall of the second ring groove is also tightly attached to the top surface of the inner ring wall of the second ring groove. Therefore, the negative pressure self-priming seals the air passage that was originally connected to exhaust hole one and exhaust hole two, forming a self-sealing state and ensuring smooth exhaust. At the same time, because the pressure cap protrudes from the valve seat surface, it is more convenient to connect to the air pump.

[0007] A further improvement is to install a limiting post at the center of the inner wall of the top cover, with the bottom wall of the limiting post being lower than the bottom wall of the pressure cylinder but higher than the outer wall of the second annular groove on the valve seat. The limiting post effectively prevents the silicone valve core from being pulled up too much, thus affecting its rebound and reset.

[0008] A further improvement is that the vent hole on the valve seat is equipped with a cross-shaped grid. If the compressed bag contains small, hard particles like rice grains, they will press against the silicone pad, causing a leak. The vent hole with the cross-shaped grid structure effectively solves this problem.

[0009] A further improvement is that the thickness of the self-absorbing sheet is 0.4-0.6 mm. This thickness provides the best deformation and recovery effect for the self-absorbing sheet.

[0010] A further improvement is that the bottom wall of the first annular groove is stepped, and the bottom walls of the valve core's retaining ring and the gland's retaining sleeve are located on the stepped surfaces at different heights on the bottom wall of the first annular groove. The staggered arrangement of the sealing connection grooves improves airtightness.

[0011] A further improvement is that the bottom edge of the gland's retaining sleeve is provided with an outer retaining protrusion, and a retaining ring groove recessed into the side wall is formed at the bottom of the outer side wall of the first annular groove, with the retaining protrusion engaged in the retaining ring groove. This ensures a secure and non-slip connection between the gland and the valve seat.

[0012] A further improvement to this invention is that multiple air guide grooves are formed on the bottom surface of the valve seat from the outer edge towards the central exhaust hole. This effectively prevents the bottom surface of the valve seat from sticking tightly to the other layer of the bag film, thus hindering the flow of air from inside the bag to the exhaust hole of the valve seat.

[0013] A further improvement to this invention is that a guide ring groove is formed on the bottom surface of the valve seat, and the guide grooves on the bottom surface of the valve seat on both the inner and outer sides of the guide ring groove are connected to the guide ring groove. Since the circumference decreases near the center of the valve seat, the available space for the guide groove on the bottom surface of the valve seat is limited. Therefore, more guide grooves can be formed on the bottom surface of the valve seat outside the guide ring groove, and then connected to the inner guide groove through the guide ring groove, thus increasing the air guiding channel.

[0014] A further improvement to this invention is that the bottom surface of the valve seat has a rounded chamfered edge. This effectively prevents wear on the other layer of the bag film and also prevents the air guide groove from being absorbed and blocked. Beneficial effects

[0015] (1) A round hole is opened on the vacuum compression bag body. The upper surface of the valve seat on the outer periphery of the pressure cap is bonded to the inner surface of the bag body around the round hole. When the rubber valve core is drawn up and deformed, it will not be adsorbed on the valve body membrane. The exhaust is smooth and the self-sealing state is good after exhaust.

[0016] (2) The gland protrudes from the valve seat surface, which facilitates accurate connection of the air pump.

[0017] (3) The lower convex limiting post inside the pressure cap prevents the silicone valve core from being sucked up too much and unable to rebound and reset, without affecting the deformation and lifting of the silicone valve core to release the exhaust channel. Attached Figure Description

[0018] Figure 1 This is a cross-sectional view of the structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the front of the valve seat;

[0020] Figure 3 for Figure 2 AA section view;

[0021] Figure 4 This is a schematic diagram of the valve seat side;

[0022] Figure 5 This is a schematic diagram of the reverse side of the valve seat;

[0023] Figure 6 This is a schematic diagram of the front of the valve core;

[0024] Figure 7 for Figure 6 BB section view;

[0025] Figure 8 This is a schematic diagram of the reverse side of the cap;

[0026] Figure 9 for Figure 8 CC section view;

[0027] Figure 10This is a front view of the present utility model. Detailed Implementation

[0028] like Figures 1 to 10 As shown, this utility model includes a valve seat 1, a valve core 2, and a pressure cap 3. The upper surface of the valve seat 1 forms a first annular groove 11, a second annular groove 12, and an inner ring groove 13 from the outer edge to the center. An exhaust hole 14 is provided in the center of the inner ring groove 13. The top surface of the outer ring wall 121 of the second annular groove is higher than the top surface of the inner ring wall 122 of the second annular groove. The bottom wall of the first annular groove 11 is a stepped surface.

[0029] The silicone valve core 2 includes a retaining ring 21, a self-priming plate 22, and an inner sealing gasket 23. The top surface of the retaining ring 21 is connected to the periphery of the self-priming plate 22, and the inner sealing gasket 23 is located on the bottom surface of the center of the self-priming plate 22. The thickness of the self-priming plate 22 is 0.4-0.6 mm. The thickness of the inner sealing gasket 23 is equal to the depth from the bottom wall of the inner ring groove 13 to the top surface of the peripheral wall. The height of the retaining ring 21 is the height from the bottom wall of the first ring groove to the top surface of the outer ring wall of the second ring groove.

[0030] The gland 3 includes a retainer 31, a pressure cylinder 32 on the top surface of the retainer, and a top cover 33 on the top surface of the pressure cylinder. The width of the first annular groove 11 on the valve seat is equal to the sum of the wall thickness of the retainer 31 of the gland and the retaining ring 21 of the valve core.

[0031] The retaining ring 21 and retaining sleeve 31 are fitted into the first annular groove 11. The retaining ring 21 of the valve core is against the inner wall of the first annular groove. The retaining sleeve 31 of the gland is fitted between the outer wall of the first annular groove 11 and the outer wall of the retaining ring 21. The bottom wall of the retaining ring 21 of the valve core and the bottom wall of the retaining sleeve 31 of the gland are respectively located on the stepped surfaces 111 at different heights on the inner bottom wall of the first annular groove 11. The pressure sleeve 32 of the gland presses on the top surface of the retaining ring 21 of the valve core. The self-priming plate 22 covers the second annular groove 12 and the inner ring groove 13. The inner sealing gasket 23 is located in the inner ring groove 13. The diameter of the inner sealing gasket 23 is smaller than that of the inner ring groove 13. The inner diameter is larger than the diameter of the first vent hole 14. The thickness of the inner sealing gasket 23 is less than the height difference between the bottom wall 131 of the inner ring groove and the top surface of the outer ring wall 121 of the second ring groove. Four equidistant vent holes 24 are opened on the self-priming plate 22 above the second ring groove. The top surface of the pressure cylinder 32 protrudes from the top surface of the valve seat 1. A space is formed between the bottom of the top cover 33 and the valve core 2. A limiting post 35 is provided downward at the center of the inner wall of the top cover 33. The bottom wall height of the limiting post 35 is lower than the bottom wall height of the pressure cylinder 32 and higher than the outer wall height of the second ring groove 12 on the valve seat. Vent holes 34 are opened on the top cover 33.

[0032] The valve seat 1, valve core 2, and pressure cap 3 are each integrally formed.

[0033] If the vent hole on the valve seat is too large, and the compressed bag contains small, hard particles like rice grains, it will push against the silicone pad, causing a leak. Therefore, a cross grid 10 is provided in the vent hole 14 to effectively solve this problem.

[0034] In order to secure the cap and prevent it from slipping, the bottom edge of the cap's retaining sleeve 31 is provided with an outer edge retaining ring 36, and the bottom of the outer side wall of the first annular groove 11 is provided with a retaining ring groove 112 that is recessed towards the side wall, and the retaining ring 36 is fitted into the retaining ring groove 112.

[0035] The bottom surface of the valve seat 1 has an air guide ring groove 17. Multiple air guide grooves 16 are opened from the outer ring to the center on the bottom surface of the valve seat inside and outside the air guide ring groove 17. The air guide grooves 16 on the inner and outer sides are connected to the air guide ring groove 17, and the air guide groove 16 on the inner side is connected to the exhaust hole 14.

[0036] The valve seat 1 has an outer edge platform ring 15 on the outer periphery of its top surface. The upper surface periphery of the valve seat and the platform ring have a large bonding surface with the vacuum compression bag body, making it more stable and flat. The bottom surface periphery of the valve seat 1 has an arc-shaped chamfered edge 18.

[0037] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A self-sealing silicone exhaust valve with unobstructed exhaust, comprising a valve seat (1), a valve core (2), and a gland (3). The upper surface of the valve seat (1) forms a first annular groove (11), a second annular groove (12), and an inner ring groove (13) from the outer edge to the center. An exhaust hole (14) is provided in the center of the inner ring groove (13). The top surface of the outer ring wall (121) of the second annular groove is higher than the top surface of the inner ring wall (122) of the second annular groove. The silicone valve core (2) comprises a retaining ring (21), a self-priming plate (22), and an inner sealing gasket (23). The self-priming plate (22) is connected to the top surface of the retaining ring (21) around its periphery. The inner sealing gasket (23) is connected to the top surface of the inner ring (21). 3) Located on the center bottom surface of the self-priming plate (22), the retaining ring (21) is fitted into the first ring groove (11), the self-priming plate (22) covers the second ring groove (12) and the inner ring groove (13), the inner sealing gasket (23) is located in the inner ring groove (13), the diameter of the inner sealing gasket (23) is smaller than the inner diameter of the inner ring groove (13) and larger than the diameter of the first vent hole (14), the thickness of the inner sealing gasket (23) is smaller than the height difference between the bottom wall (131) of the inner ring groove and the top surface of the outer ring wall (121) of the second ring groove, and the self-priming plate (22) above the second ring groove has a second vent hole (24), characterized in that: The pressure cap (3) includes a retainer (31), a pressure cylinder (32) on the top surface of the retainer, and a top cover (33) on the top surface of the pressure cylinder. The width of the first annular groove (11) on the valve seat is equal to the sum of the wall thickness of the retainer (31) of the pressure cap and the retaining ring (21) of the valve core. The retainer (31) of the pressure cap is fitted between the outer wall of the first annular groove (11) and the outer wall of the retaining ring (21) of the valve core. The bottom wall of the pressure cylinder (32) is pressed on the top surface of the retaining ring (21) of the valve core. The top surface of the pressure cylinder (32) protrudes from the top surface of the valve seat (1). The top cover (33) has three exhaust holes (34).

2. The self-sealing silicone exhaust valve for unobstructed exhaust as described in claim 1, characterized in that: The inner wall of the top cover (33) is provided with a limiting post (35) facing downward. The bottom wall height of the limiting post (35) is lower than the bottom wall height of the pressure cylinder (32) and higher than the outer wall height of the second annular groove (12) on the valve seat.

3. The self-sealing silicone exhaust valve for unobstructed exhaust as described in claim 1, characterized in that: A cross grille (10) is provided in the vent hole (14) on the valve seat.

4. The self-sealing silicone exhaust valve for unobstructed exhaust as described in claim 1, characterized in that: The self-absorbing sheet (22) has a thickness of 0.4-0.6 mm.

5. The self-sealing silicone exhaust valve for unobstructed exhaust as described in claim 1, characterized in that: The bottom wall of the first annular groove (11) is stepped, and the bottom wall of the valve core retaining ring (21) and the bottom wall of the gland retaining sleeve (31) are located on the stepped surfaces (111) at different heights of the bottom wall of the first annular groove (11).

6. The self-sealing silicone exhaust valve for unobstructed exhaust as described in claim 1, characterized in that: The bottom edge of the cap's cylinder (31) is provided with an outer edge retaining ring (36), and the bottom of the outer side wall of the first annular groove (11) is provided with a retaining ring groove (112) that is recessed towards the side wall, and the retaining ring (36) is fitted into the retaining ring groove (112).

7. The self-sealing silicone exhaust valve for unobstructed exhaust as described in claim 1, characterized in that: The valve seat (1) has an outer edge platform ring (15) on the outer periphery of its top surface.

8. The self-sealing silicone exhaust valve for unobstructed exhaust as described in claim 1, characterized in that: The bottom surface of the valve seat (1) has multiple air guide grooves (16) extending from the outer edge to the central exhaust hole.

9. The self-sealing silicone exhaust valve for unobstructed exhaust as described in claim 8, characterized in that: The bottom surface of the valve seat (1) has an air guide ring groove (17), and the air guide groove (16) on the bottom surface of the valve seat inside and outside the air guide ring groove (17) is connected to the air guide ring groove (17).

10. The self-sealing silicone exhaust valve for unobstructed exhaust as described in claim 1, characterized in that: The bottom surface of the valve seat (1) has an arc-shaped chamfered edge (18).

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