Aerosol can pressure measuring tool with pressure relief function
By designing a pressure testing tool for aerosol cans with a pressure relief function, the problem of unqualified filling volume and pressure in aerosol can production was solved, and the safe switching between pressure measurement and pressure relief was realized, thereby improving the quality control and safety of the production process.
Patent Information
- Application Number
- CN202520071904.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-13
- Publication Date
- 2025-12-02
- Estimated Expiration
- 2035-01-13
AI Technical Summary
During the production of aerosol cans, products with substandard filling volume or filling pressure are difficult to detect in a timely manner, affecting product quality and safety. Furthermore, existing equipment lacks stability during the initial startup phase, leading to increased production costs and greater difficulty in quality control.
Design an aerosol can pressure testing tool with pressure relief function. Through the movable plug-in cooperation of the pressure testing fixed head and the pressure testing movable head and the elastic limit mechanism, the pressure testing and pressure relief functions can be switched. The sealing ring and channel design ensure the pressure testing accuracy and safe pressure relief.
It enables accurate measurement of the internal pressure of aerosol cans and timely detection of defective products, ensuring product quality consistency and safety, and reducing production costs and quality control difficulties.
Smart Images
Figure CN223620132U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of pressure measuring device technology, specifically to an aerosol can pressure measuring tool with pressure relief function. Background Technology
[0002] Aerosol cans, as a common form of packaging, are widely used in personal care, household cleaning, car care, and agriculture, among other fields. Their production process involves sophisticated filling technology to ensure that the amount and pressure of liquid or gas in each aerosol can meet product specifications. However, in actual production, due to various factors (such as insufficient stability during initial equipment startup, slight changes in raw material properties, and wear and tear on filling equipment), products may occasionally produce filling volumes or pressures that do not meet standards. These problems not only affect the product's effectiveness but may also pose a potential threat to consumer safety.
[0003] Especially when the filling machine is first started up and has not yet reached a stable state, insufficient filling accuracy is often caused by inadequate equipment preheating, insufficient lubrication, or inaccurate adjustment of the control system. If these defective products are not detected and handled in time, they will directly flow into subsequent processes, increasing production costs and the difficulty of quality control. Utility Model Content
[0004] The purpose of this invention is to provide an aerosol can pressure testing tool with a pressure relief function. This tool can conveniently release the liquid or gas inside the aerosol can and accurately detect the internal pressure of the aerosol can. This allows for the timely detection and handling of products with substandard filling volume or filling pressure during the production process, thereby ensuring the consistency and safety of product quality.
[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:
[0006] A pressure testing tool for an aerosol can with a pressure relief function includes a pressure gauge, a fixed pressure testing head, and a movable pressure testing head, arranged from top to bottom. The upper end of the fixed pressure testing head is detachably connected to the pressure gauge, and the lower end of the fixed pressure testing head is movably inserted into the movable pressure testing head. The lower end of the movable pressure testing head is provided with a pressure testing nozzle, and pressure relief nozzles are provided on both sides. Adjusting the insertion depth of the movable pressure testing head can switch the pressure testing or pressure relief working state of the pressure testing tool.
[0007] Furthermore, the pressure measuring movable head has an upward-opening insertion groove, which is inserted into the pressure measuring fixed head. A first pressure measuring channel is vertically arranged inside the pressure measuring nozzle, and a pressure relief channel is horizontally arranged inside both pressure relief nozzles. The inner ends of the first pressure measuring channel and the pressure relief channel are connected to the insertion groove.
[0008] Furthermore, the lower end of the pressure measuring head is formed with a plunger rod that is inserted into the insertion groove. A second pressure measuring channel is vertically disposed inside the plunger rod. The second pressure measuring channel is vertically opposite to the first pressure measuring channel. The upper end of the second pressure measuring channel is connected to the pressure gauge. A first sealing ring and a second sealing ring are spaced apart on the part of the plunger rod that extends into the insertion groove.
[0009] Furthermore, the first sealing ring forms a seal between the plunger rod and the pressure measuring head. After the plunger rod is inserted into the bottom of the insertion groove, the second sealing ring forms a barrier between the pressure relief channel and the pressure measuring channel. The second pressure measuring channel is vertically connected to the first pressure measuring channel.
[0010] Furthermore, an elastic limiting mechanism is provided between the pressure measuring fixed head and the pressure measuring movable head.
[0011] Furthermore, the elastic limiting mechanism includes limiting plates symmetrically and vertically arranged on both sides of the pressure measuring movable head. Each of the two limiting plates is vertically provided with a limiting elongated hole. The limiting elongated hole is movably engaged with a limiting screw. The inner end of the limiting screw is connected to the column base of the pressure measuring fixed head. The column base is located at the lower part of the pressure measuring fixed head. A return spring is also sleeved on the plunger rod. The upper end of the return spring abuts against the lower end of the column base, and the lower end abuts against the upper end of the pressure measuring movable head.
[0012] Furthermore, the external hose of the pressure relief nozzle guides the released liquid into a container.
[0013] Compared with the prior art, the present invention has the following beneficial effects:
[0014] This utility model integrates pressure measurement and pressure relief functions. The insertion depth is adjusted via a movable connection between the fixed and movable pressure measuring heads, along with an elastic limiting mechanism, enabling switching between working states. This pressure measuring tool is ingeniously designed and multifunctional, capable of both pressure measurement and safe pressure relief, thus improving operational flexibility and safety. It meets the pressure measurement and pressure relief needs of containers such as aerosol cans. Attached Figure Description
[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0016] Figure 1 This is a schematic diagram of the structure of this utility model;
[0017] Figure 2 for Figure 1 Schematic diagram of cross-sectional structure along the AA direction;
[0018] Figure 3 for Figure 1 Schematic diagram of cross-sectional structure in the BB direction;
[0019] Figure 4 This is a schematic diagram of the structure of the present invention when the pressure gauge is concealed. Detailed Implementation
[0020] The technical solutions in the embodiments of this utility model will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.
[0021] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.
[0022] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0023] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.
[0024] like Figure 1-4As shown, an aerosol can pressure testing tool with a pressure relief function is disclosed. The pressure testing tool includes a pressure gauge 1, a pressure testing fixed head 2, and a pressure testing movable head 3, which cooperate with each other from top to bottom. The upper end of the pressure testing fixed head 2 is detachably connected to the pressure gauge 1, and the lower end of the pressure testing fixed head 2 is movably inserted into the pressure testing movable head 3. The lower end of the pressure testing movable head 3 is provided with a pressure testing nozzle 31, and pressure relief nozzles 32 are provided on both sides. Adjusting the insertion depth of the pressure testing movable head 3 can switch the pressure testing or pressure relief working state of the pressure testing tool.
[0025] Specifically, the pressure measuring head 2 and the pressure gauge 1 are connected by a threaded structure.
[0026] Specifically, as shown in the figure, the pressure measuring movable head 3 has an upward-opening insertion groove, which is inserted into the pressure measuring fixed head 2. A first pressure measuring channel 33 is vertically arranged inside the pressure measuring nozzle 31, and pressure relief channels 34 are horizontally arranged inside both pressure relief nozzles 32. The inner ends of the first pressure measuring channel 33 and the pressure relief channel 34 are connected to the insertion groove. A plunger rod 22 is formed at the lower end of the pressure measuring fixed head 2, which is inserted into the insertion groove. A second pressure measuring channel 23 is vertically arranged inside the plunger rod 22, and the second pressure measuring channel 23 is vertically opposite to the first pressure measuring channel 33. The upper end of the second pressure measuring channel 23 is connected to the pressure gauge 1. A first sealing ring 24 and a second sealing ring 25 are spaced apart on the portion of the plunger rod 22 that extends into the insertion groove. Specifically, as shown in the figure, the first sealing ring 24 forms a seal between the plunger rod 22 and the pressure measuring movable head 3. After the plunger rod 22 is inserted into the bottom of the insertion groove, the second sealing ring 25 forms a barrier between the pressure relief channel 34 and the pressure measuring channel. The second pressure measuring channel 23 is vertically connected to the first pressure measuring channel 33.
[0027] Pressure testing mode:
[0028] When the plunger rod 22 is fully inserted into the insertion groove of the pressure measuring head 3 and reaches the predetermined depth, the first sealing ring 24 fits tightly against the inner wall of the pressure measuring head 3 to ensure the sealing between the pressure measuring channels.
[0029] At the same time, the second sealing ring 25 is also tightly fitted into the insertion groove of the pressure measuring head 3, effectively isolating the pressure relief channel 34 from the pressure measuring channel (i.e., the first pressure measuring channel 33 and the second pressure measuring channel 23).
[0030] At this time, the pressure inside the aerosol can is transmitted to the pressure gauge 1 through the first pressure measuring channel 33 of the pressure measuring nozzle 31 and the second pressure measuring channel 23 of the plunger rod 22, thus achieving accurate pressure measurement.
[0031] Pressure relief mode:
[0032] When pressure relief is required, the user will adjust the insertion depth of the plunger rod 22 in the insertion groove, so that the position of the second sealing ring 25 moves upward, thereby connecting the pressure measuring channel and the pressure relief channel 34.
[0033] When the internal pressure of the aerosol can is too high, the high-pressure gas can be safely released into the external environment through the pressure measurement channel and the pressure relief channel 34, thereby reducing the internal pressure of the aerosol can.
[0034] It should be noted that during the depressurization process, the first sealing ring 24 remains sealed to prevent gas or liquid in the pressure testing channel from leaking into the external environment.
[0035] Specifically, as shown in the figure, an elastic limiting mechanism is provided between the pressure measuring fixed head 2 and the pressure measuring movable head 3. The elastic limiting mechanism includes limiting plates 4 symmetrically and vertically arranged on both sides of the pressure measuring movable head 3. Each of the two limiting plates 4 is vertically provided with a limiting elongated hole 41. The limiting elongated hole 41 is movably engaged with a limiting screw 5. The inner end of the limiting screw 5 is connected to the column base 21 of the pressure measuring fixed head 2. The column base 21 is located at the lower part of the pressure measuring fixed head 2. A return spring 6 is also sleeved on the plunger rod 22. The upper end of the return spring 6 abuts against the lower end of the column base 21, and the lower end abuts against the upper end of the pressure measuring movable head 3.
[0036] When no external force is applied, the pressure measuring head 3 remains in its initial position under the elastic force of the return spring 6. At this time, the limit screw 5 restricts the vertical movement range of the pressure measuring head 3 through the limit hole 41. The return spring 6 is in a compressed state, but not over-compressed, to ensure that it can provide sufficient elastic force to restore the position of the pressure measuring head 3. During the pressure measurement process, the pressure measuring head 3 moves downward under the thrust of the plunger rod 22, but due to the limitation of the limit screw 5, it will not move excessively and damage the sealing ring or affect the pressure measurement accuracy. When the pressure measurement is completed, the elastic force of the return spring 6 will restore the pressure measuring head 3 to its initial position.
[0037] This invention is applied to the control of gas or liquid filling volume and internal pressure measurement of aerosol cans. The pressure testing head is aligned with the aerosol valve and pressed down until it retracts to its maximum position, opening the valve to measure pressure. The pressure gauge reading is the internal pressure of the aerosol can. When the pressure is fully released, the aerosol valve automatically closes completely, preventing gas or liquid from being ejected. During pressure measurement, any gas or liquid flowing into the pressure testing fixture will be ejected through the pressure relief channel to release pressure, completing the measurement. By controlling the stroke of the releasing tool, the aerosol valve can be partially closed, allowing gas or liquid inside the aerosol can to be ejected through the pressure relief channel. The ejection volume can be adjusted as needed to control the filling volume and pressure.
[0038] Taking a female valve aerosol can as an example, when the pressure relief testing tool is in the open state, the pressure testing channel, the two pressure relief channels, and the pressure gauge are connected. The fixed pressure testing head and the movable pressure testing head are sealed by the first sealing ring. Insert the movable pressure testing head into the hole of the female valve and press the testing tool down forcefully. When the force applied to the pressure relief testing tool exceeds the spring force, the movable pressure testing head retracts, fully retracting and pressing against the fixed pressure testing head. At this point, the movable pressure testing head opens the aerosol valve, connecting the pressure testing channel to the pressure gauge. Due to the second sealing ring, the pressure testing channel is separated from the pressure relief channel, preventing gas or liquid leakage. When the gas or liquid inside the aerosol can flows to the pressure gauge position, the pressure reading is the internal pressure value of the aerosol can. When it is necessary to adjust the filling volume or filling pressure, loosen the pressure relief and testing fixture to allow the pressure testing head to spring back slightly, connecting the pressure testing channel with the pressure relief channel. At this time, because the spring force is greater than the spring force of the aerosol valve, the aerosol valve is still in the open state, and the gas or liquid inside the aerosol can can be released through the pressure relief channel. The release flow can be controlled by adjusting the up and down position of the second sealing ring. Pressing the pressure testing head back down will stop the pressure relief and simultaneously measure the internal pressure of the aerosol can.
[0039] In practical use, pressure relief channels 1 and 2 can be connected to hoses to guide the released liquid into a dedicated container. This allows the tool to simultaneously perform pressure relief and pressure measurement functions, without contaminating the aerosol can. By replacing the movable pressure probe with different specifications as needed, pressure relief and measurement of different sized aerosol valves can be achieved.
[0040] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
[0041] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.
Claims
1. A pressure testing tool for an aerosol can with a pressure relief function, characterized in that, The pressure testing tool includes a pressure gauge, a fixed pressure testing head, and a movable pressure testing head, which cooperate with each other from top to bottom. The upper end of the fixed pressure testing head is detachably connected to the pressure gauge, and the lower end of the fixed pressure testing head is movably inserted into the movable pressure testing head. The lower end of the movable pressure testing head is provided with a pressure testing nozzle, and pressure relief nozzles are provided on both sides. Adjusting the insertion depth of the movable pressure testing head can switch the pressure testing or pressure relief working state of the pressure testing tool.
2. The aerosol can pressure testing tool with pressure relief function according to claim 1, characterized in that, The pressure measuring movable head has an upward-opening insertion slot, which is inserted into the pressure measuring fixed head. A first pressure measuring channel is vertically arranged inside the pressure measuring nozzle, and a pressure relief channel is horizontally arranged inside both pressure relief nozzles. The inner ends of the first pressure measuring channel and the pressure relief channel are connected to the insertion slot.
3. The aerosol can pressure testing tool with pressure relief function according to claim 2, characterized in that, The lower end of the pressure measuring head has a plunger rod that is inserted into the insertion slot. A second pressure measuring channel is vertically disposed inside the plunger rod. The second pressure measuring channel is vertically opposite to the first pressure measuring channel. The upper end of the second pressure measuring channel is connected to the pressure gauge. A first sealing ring and a second sealing ring are spaced apart on the part of the plunger rod that extends into the insertion slot.
4. The aerosol can pressure testing tool with pressure relief function according to claim 3, characterized in that, The first sealing ring forms a seal between the plunger rod and the pressure measuring head. After the plunger rod is inserted into the bottom of the insertion groove, the second sealing ring forms a barrier between the pressure relief channel and the pressure measuring channel. The second pressure measuring channel is vertically connected to the first pressure measuring channel.
5. The aerosol can pressure testing tool with pressure relief function according to claim 4, characterized in that, An elastic limiting mechanism is provided between the fixed pressure measuring head and the movable pressure measuring head.
6. The aerosol can pressure testing tool with pressure relief function according to claim 5, characterized in that, The elastic limiting mechanism includes limiting plates symmetrically and vertically arranged on both sides of the pressure measuring movable head. Each of the two limiting plates is vertically provided with a limiting elongated hole. The limiting elongated hole is movably engaged with a limiting screw. The inner end of the limiting screw is connected to the column base of the pressure measuring fixed head. The column base is located at the lower part of the pressure measuring fixed head. A return spring is also sleeved on the plunger rod. The upper end of the return spring abuts against the lower end of the column base, and the lower end abuts against the upper end of the pressure measuring movable head.
7. The aerosol can pressure testing tool with pressure relief function according to claim 6, characterized in that, The external hose of the pressure relief nozzle directs the released liquid into a container.