Bottom filling structure with high sealing performance

Abstract

The utility model discloses a bottom filling structure with high sealing performance, which is mounted in a mounting groove at the bottom of a bottle body and comprises a shell clamped in the mounting groove, an air outlet hole formed in the bottom wall of the shell, an inner sleeve clamped in the shell, a partition plate arranged on the inner sleeve, and air inlet grooves uniformly distributed on the circumference of the inner sleeve, a lower silica gel pad blocking the air outlet hole is movably arranged in the shell, exhaust grooves are evenly distributed in the circumference of the side wall of the lower silica gel pad, a protrusion is arranged on the lower silica gel pad in an extending mode, a T-shaped through hole is formed in the lower silica gel pad, an upper silica gel pad is arranged on the partition plate, and the upper silica gel pad is matched with the liquid inlet hole in a wedge-shaped mode. A valve rod with a feeding channel is arranged in the upper silica gel pad in a sliding and sealing mode, a clamping ring groove is formed in the valve rod, the valve rod penetrates through the partition plate and then is inserted into the T-shaped through hole, the protrusion is clamped in the clamping ring groove, and the valve rod is sleeved with a spring abutting against the partition plate and the valve rod. According to the utility model, high sealing performance can be maintained during liquid filling and in an environment with a negative pressure of 0.8 MPa.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of container, especially high sealing property bottom filling structure. BACKGROUND

[0002] The liquid spraying bottle on the market is applied to multiple fields such as cosmetics, medicine and food, is generally disposable, and is discarded after use, causing waste. In order to solve this problem, a bottle body with a filling structure arranged at the bottom to realize repeated filling appears on the market. In the filling structure on the market, a valve rod directly abuts against a lower sealing pad, the lower sealing pad is movably arranged in a shell, an upper sealing pad is sealingly arranged in a liquid inlet hole of the bottle bottom, and the valve rod is sealingly and slidably arranged in the upper sealing pad. When filling liquid, a filling device is abutted against a filling opening of the lower sealing pad to push the lower sealing pad and the valve rod upward. Since only an upward force is applied to the filling opening in the lower sealing pad during liquid filling, the stress area of the lower sealing pad is locally compressed due to high stress, and the surrounding area away from the stress area is passively deformed due to stress gradient, so that the sealing property between the lower sealing pad and the valve rod is damaged. Liquid leakage occurs during liquid filling. In addition, the sealing experiment cannot be passed, and liquid leakage easily occurs between the liquid inlet hole and the upper sealing pad under the condition of negative pressure of 0.8 MPa. This indicates that the above-mentioned filling structure is prone to liquid leakage when used in a high-temperature environment and a low-pressure environment. Finally, since the exhaust gap is small to ensure the stability of the structure, the exhaust speed is low during liquid filling. Low exhaust speed reduces the liquid filling speed. CONTENT OF THE UTILITY MODEL

[0003] The utility model aims at providing a high sealing property bottom filling structure which can maintain high sealing property in liquid filling and non-liquid filling states.

[0004] In order to realize the above-mentioned purpose, the technical scheme adopted by the utility model is: high sealing bottom filling structure, its installation is in the installation groove which is connected with liquid inlet hole and exhaust hole in bottle body bottom, including: seal in the installation groove in the shell, the bottom wall of shell is provided with exhaust hole, seal in the shell in the inner sleeve, the top of inner sleeve and installation groove leave upper gap, the inner sleeve is provided with baffle, the top of inner sleeve is evenly distributed with several air inlet groove which is connected with inner cavity through baffle, the lower silica gel pad is movably arranged in the shell, the lower silica gel pad is blocked on the exhaust hole, the lower silica gel pad and inner sleeve leave side gap, the side wall of lower silica gel pad is evenly distributed with several exhaust groove, the convex is arranged on the lower silica gel pad, the T-shaped through hole is arranged on the lower silica gel pad, the upper silica gel pad is arranged on the baffle, the upper silica gel pad is sealed and clings to the bottle body bottom, the upper silica gel pad is clamped into the liquid inlet hole and is wedge-shaped with the liquid inlet hole, the valve rod is movably arranged in the upper silica gel pad, the feed channel is arranged in the valve rod, the upper end outlet of feed channel is blocked by the upper silica gel pad, the convex is arranged on the valve rod, the snap ring groove is arranged on the bottom wall of convex, the valve rod is inserted into the large hole end of T-shaped through hole after passing through baffle, the convex on the lower silica gel pad is clamped in the snap ring groove, the spring is sleeved on the valve rod, and the two ends of spring are respectively abutted on baffle and convex.

[0005] Further, the high sealing bottom filling structure, wherein, the inner side wall of installation groove is provided with positioning groove, the outer side wall of shell is provided with positioning ring, the bottom of shell is provided with ring table which extends outward, the shell and installation groove are interference fit, the positioning ring on shell is clamped into the positioning groove of installation groove, and the ring table on shell clings to the slot opening of installation groove.

[0006] Further, the high sealing bottom filling structure, wherein, the inner bottom wall of shell is provided with deepening groove which is concave upward and downward, and the lower silica gel pad is movably arranged in the deepening groove, and the side gap is also left between the lower silica gel pad and the deepening groove.

[0007] Further, the high sealing bottom filling structure, wherein, the outer side wall of convex on the lower silica gel pad is wedge-shaped with the snap ring groove.

[0008] Further, the high sealing bottom filling structure, wherein, the top of inner sleeve is evenly distributed with four air inlet grooves, and the side wall of lower silica gel pad is evenly distributed with four exhaust grooves.

[0009] Further, the high sealing bottom filling structure, wherein, the aperture of small hole end of T-shaped hole is larger than the aperture of feed channel on valve rod.

[0010] Further, the high sealing bottom filling structure, wherein, the outer side wall of upper silica gel pad clings to the inner side wall of inner sleeve top and is interference fit with it.

[0011] The advantages of this invention are as follows: A protrusion is provided on the lower silicone pad, and a retaining ring groove is provided on the valve stem. The protrusion on the lower silicone pad is then engaged in the retaining ring groove on the valve stem, creating a mechanical interlock between the lower silicone pad and the valve stem. When the lower silicone pad is subjected to a pushing force, the lateral expansion of the unstressed area on the lower silicone pad is blocked by the retaining ring groove, forming a rigid boundary constraint. This prevents deformation of the unstressed area of ​​the lower silicone pad, ensuring the sealing performance and structural stability between the lower silicone pad and the valve stem, and preventing leakage during filling. Furthermore, a wedge-shaped fit is achieved between the upper silicone pad and the inlet hole of the bottle. Under the action of the spring, the sealing performance between the upper silicone pad and the inlet hole is ensured. Moreover, the wedge-shaped fit between the upper silicone pad and the inlet hole provides excellent sealing performance. It provides radial force, thereby improving the sealing performance between the upper silicone pad and the valve stem. In the sealing test, even under a negative pressure of 0.8 MPa, it can still maintain a high level of sealing between the upper silicone pad, the valve stem, and the inlet hole, indicating that no leakage will occur under high temperature and low pressure environments. The air inlet groove on the inner sleeve and the venting groove on the lower silicone pad can increase the air discharge rate inside the bottle during filling, thereby improving the filling effect. The deepened groove on the outer shell can increase the upward stroke of the lower silicone pad, thereby increasing the opening between the upper silicone pad and the outer shell during filling. The larger the opening, the better the venting effect. Combined with the air inlet groove on the inner sleeve and the venting groove on the lower silicone pad, the venting effect can be further improved, thereby further increasing the filling speed. Attached Figure Description

[0012] Fig. 1 This is a schematic diagram of the fit between the high-sealing bottom filling structure and the bottle body described in this utility model.

[0013] Fig. 2 This is a cross-sectional view of the high-sealing bottom filling structure described in this utility model after it is installed on the bottle body.

[0014] Fig. 3 This is an exploded structural diagram of the high-sealing bottom filling structure described in this utility model. Detailed Implementation

[0015] The technical solution of this utility model will be further described below with reference to the accompanying drawings and preferred embodiments.

[0016] like Figs. 1-3As shown, the high-sealing bottom filling structure of this utility model is installed in the mounting groove 11 at the bottom of the bottle body 1, which is connected to the liquid inlet 12 and the vent 13. It includes: a shell 2 that is sealed and engaged in the mounting groove 11; a vent 23 is provided on the bottom wall of the shell 2; the shell 2 and the mounting groove 11 are interference fit to improve the sealing performance between the shell 2 and the mounting groove 11; a positioning groove 111 is provided on the inner side wall of the mounting groove 11; a positioning ring 21 is provided on the outer side wall of the shell 2; and a ring platform 22 extends outward from the bottom of the shell 2. The positioning ring 21 on the shell 2 is engaged in the positioning groove 111 of the mounting groove 11, and the ring platform 22 on the shell 2 abuts against the groove opening of the mounting groove 11. The engagement structure between the positioning groove 111 and the positioning ring 21 and the abutment structure between the ring platform 22 and the groove opening of the mounting groove 11 form a double seal, further improving the sealing performance between the shell 2 and the mounting groove 11.

[0017] An inner sleeve 3 is sealed and fitted inside the outer shell 2. An upper gap is left between the top of the inner sleeve 3 and the mounting groove 11. This upper gap is used to release air from the bottle 1 during filling. A partition 31 is provided on the inner sleeve 3. Four air inlet grooves 32, which pass through the partition 31 and communicate with the inner cavity, are evenly distributed around the top circumference of the inner sleeve 3. During filling, when air in the bottle 1 is released from the air inlet grooves 32 into the upper gap between the inner sleeve 3 and the mounting groove 11, the air in the upper gap can quickly enter the inner cavity of the inner sleeve 3 through the air inlet grooves 32. Deepening grooves 24 are recessed on the inner bottom wall of the outer shell 2. A lower silicone pad 4 is movably installed in the deepening groove 24, blocking the vent 23. Side gaps are left between the lower silicone pad 4, the deepening groove 24, and the inner sleeve 3. Four exhaust grooves 41 are evenly distributed around the side wall of the lower silicone pad 4. When the lower silicone pad 4 moves upward... When the outer shell 2 is removed, the air that has entered the inner cavity of the inner sleeve 3 can be discharged outward through the side gap. The side gap cannot be set too large, as this will affect the stability of the vertical movement of the lower silicone pad 4. On the other hand, a small side gap will cause the air to be discharged unevenly, which will affect the filling speed. The venting groove 41 set on the side wall of the lower silicone pad 4 can accelerate the air discharge efficiency in the inner sleeve 3, thereby improving the filling speed. The deepening groove 24 set in the outer shell 2 can increase the upward stroke of the lower silicone pad 4, thereby increasing the venting gap between the lower silicone pad 4 and the bottom wall of the outer shell 2. The larger the venting gap, the higher the air discharge efficiency and the faster the filling speed. Therefore, the purpose of setting the air inlet groove 32 on the inner sleeve 3, the venting groove 41 on the lower silicone pad 4, and the deepening groove 24 in the outer shell 2 is to improve the venting efficiency and thus improve the filling speed.

[0018] A protrusion 42 extends from the lower silicone pad 4, and a T-shaped through hole 43 is provided on the lower silicone pad 4. An upper silicone pad 5 is provided on the partition plate 31. The upper silicone pad 5 is sealed against the bottom of the bottle body 1. The upper silicone pad 5 is inserted into the liquid inlet hole 12 and has a wedge-shaped fit with the liquid inlet hole 12. The wedge-shaped fit between the liquid inlet hole 12 and the upper silicone pad 5 can improve the sealing between the two and prevent the liquid in the bottle body 1 from leaking. The outer side wall of the upper silicone pad 5 is attached to the inner side wall of the top of the inner sleeve 3 and is interference-fitted with it. The dynamic seal is equipped with a valve stem 6, in which a feed channel 61 is formed, penetrating the bottom and side walls. The upper outlet of the feed channel 61 is blocked by an upper silicone gasket 5. When the upper silicone gasket 5 wedges with the liquid inlet, it can provide radial force, thereby improving the sealing performance between the upper silicone gasket 5 and the valve stem 6. The inner sidewall of the inner sleeve 3 constrains the edge of the upper silicone gasket 5, which can not only prevent the upper silicone gasket 5 from deforming, but also provide radial force to the upper silicone gasket 5, thereby further ensuring the sealing performance between the upper silicone gasket 5 and the valve stem 6. (This is followed by a seemingly unrelated sentence about sealing performance testing.) During testing, even under a negative pressure of 0.8 MPa, the upper silicone pad 5 maintained a high level of sealing between the valve stem 6 and the inlet hole 12, indicating that no leakage occurred between the upper silicone pad 5 and the valve stem 6 and the inlet hole 12 under both high-temperature and low-pressure environments. A shoulder 62 was provided on the valve stem 6, and a retaining ring groove 621 was provided on the bottom wall of the shoulder 62. After passing through the partition 31, the valve stem 6 was inserted into the large end of the T-shaped through hole 43. The diameter of the small end of the T-shaped hole 43 was larger than the diameter of the feed channel 61 on the valve stem 6. The lower silicone pad... The protrusion 42 on the lower silicone pad 4 is engaged in the retaining ring groove 621 and wedge-shaped with the retaining ring groove 621, so that a mechanical interlock is formed between the lower silicone pad 4 and the valve stem 6. When the lower silicone pad 4 is subjected to a pushing force, the lateral expansion of the unstressed area on the lower silicone pad 4 is blocked by the retaining ring groove 621, forming a rigid boundary constraint, thereby preventing the deformation of the unstressed area of ​​the lower silicone pad 4, ensuring the sealing performance and structural stability between the lower silicone pad 4 and the valve stem 6. A spring 7 is fitted on the valve stem 6, and the two ends of the spring 7 abut against the partition plate 31 and the shoulder 62 respectively.

[0019] During filling, the filling tank is passed through the vent 23 on the outer shell 2 and then sealed against the small end of the T-shaped hole 43 in the lower silicone pad 4. The lower silicone pad 4 is pushed upwards with force. The lower silicone pad 4 will not deform when pushed, maintaining a tight seal with the valve stem 6 and ensuring no leakage during filling. After being pushed, the lower silicone pad 4 forms an venting gap with the bottom wall of the outer shell 2. The lower silicone pad 4 drives the valve stem 6 to overcome the elastic force of the spring 7 and move upwards. The inlet valve on the valve stem 6... After the upper outlet of the material channel 61 detaches from the upper silicone pad 5, it extends into the bottle body 1. The liquid in the filling tank can be poured into the bottle body 1 through the T-shaped hole 43 and the material channel 61. The air in the bottle body 1 will enter the upper gap between the inner sleeve 3 and the mounting groove 11 through the exhaust hole 13, and then enter the inner cavity of the inner sleeve 3 through the air inlet groove 32 on the inner sleeve 3. Then, it will flow quickly into the exhaust gap through the exhaust groove 41 on the lower silicone pad 4 and be discharged out through the air outlet 23. After filling, under the elastic force of spring 7, the lower silicone pad 4 re-attaches to the bottom wall of the outer shell 2 to seal the vent 23. Under the elastic force of spring 7, the partition 31 on the inner sleeve 3 continuously applies a pushing force to the upper silicone pad 5, so that the upper silicone pad 5 is sealed in the liquid inlet 12. Furthermore, the wedge-shaped fit structure between the upper silicone pad 5 and the liquid inlet 12 applies a radial force to the upper silicone pad 5 to ensure the sealing between the upper silicone pad 5 and the valve stem 6, ensuring that no leakage occurs when not filling.

[0020] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and not to limit it. Although the utility model has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the specific implementation of this utility model. Any modifications or equivalent substitutions that do not depart from the spirit and scope of this utility model should be covered within the protection scope of the claims of this utility model.

Claims

1. A high-sealing bottom-filling structure, which is installed in a mounting groove at the bottom of the bottle body that communicates with the liquid inlet and the vent, characterized in that: include: A sealed outer shell is fitted into the mounting groove. An air vent is provided on the bottom wall of the outer shell. An inner sleeve is sealed and fitted inside the outer shell, with an upper gap between the top of the inner sleeve and the mounting groove. A partition is provided on the inner sleeve. Several air inlet grooves, passing through the partition and communicating with the inner cavity, are evenly distributed around the top circumference of the inner sleeve. A lower silicone pad is movably installed inside the outer shell, sealing the air vent. A side gap is provided between the lower silicone pad and the inner sleeve. Several exhaust grooves are evenly distributed around the side wall of the lower silicone pad. A protrusion extends from the lower silicone pad, and a T-shaped through hole is provided on the lower silicone pad. An upper silicone pad is installed on the plate, which is sealed against the bottom of the bottle. The upper silicone pad is inserted into the liquid inlet and wedge-shaped with the liquid inlet. A valve stem is slidably sealed in the upper silicone pad. A feed channel penetrating the bottom and side walls is opened in the valve stem. The upper outlet of the feed channel is blocked by the upper silicone pad. A shoulder is provided on the valve stem, and a retaining ring groove is provided on the bottom wall of the shoulder. After the valve stem passes through the partition, it is inserted into the large hole end of the T-shaped through hole. The protrusion on the lower silicone pad is engaged in the retaining ring groove. A spring is fitted on the valve stem, and the two ends of the spring abut against the partition and the shoulder, respectively.

2. The high-sealing bottom filling structure according to claim 1, characterized in that: A positioning groove is provided on the inner side wall of the mounting groove, a positioning ring is provided on the outer side wall of the housing, and a ring platform is provided extending outward from the bottom of the housing. The housing and the mounting groove are interference fit. The positioning ring on the housing is inserted into the positioning groove of the mounting groove, and the ring platform on the housing is attached to the groove opening of the mounting groove.

3. The high-sealing bottom filling structure according to claim 2, characterized in that: Deepening grooves are recessed on the inner bottom wall of the outer shell, and the lower silicone pad is movably disposed in the deepening grooves. A side gap is also left between the lower silicone pad and the deepening grooves.

4. The high-sealing bottom filling structure according to claim 1, characterized in that: The raised outer wall of the lower silicone pad has a wedge-shaped fit with the retaining ring groove.

5. The high-sealing bottom filling structure according to claim 1, characterized in that: There are four air intake slots evenly distributed around the top circumference of the inner sleeve, and four exhaust slots evenly distributed around the side wall of the lower silicone pad.

6. The high-sealing bottom filling structure according to claim 1, characterized in that: The diameter of the small end of the T-shaped hole is larger than the diameter of the feed channel on the valve stem.

7. The high-sealing bottom filling structure according to claim 1, characterized in that: The outer wall of the upper silicone pad is fitted to the inner wall of the top of the inner sleeve and is interference-fitted with it.

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