General public mold pump core suction pipe accessory reverse spray structure

Abstract

A general male mold pump core suction pipe accessory reverse spray structure, including a suction pipe accessory body, a first one-way valve arranged on a main flow channel thereof, and a second one-way valve arranged at a bottom portion thereof, an annular gap formed between an inner wall of the suction pipe accessory body and an outer wall of an outlet pipe of the male mold pump core constitutes a bypass flow channel; during normal spraying, fluid pushes open the first one-way valve to be pumped out, and the second one-way valve is closed to prevent leakage; during reverse spraying, fluid is collected through the bypass flow channel, pushes open the second one-way valve to be pumped out, and the first one-way valve is closed to be sealed. The utility model transfers the reverse spray function from a complex structure inside a pump core to an external suction pipe accessory, realizes plug and play with a standard male mold pump core through double-flow-channel double-valve design, solves the problems of poor universality, high cost, and long development cycle of existing reverse spray structures, and has the remarkable advantages of simple structure, high reliability, and low cost.

Description

Technical Field

[0001] This utility model relates to the field of daily chemical product packaging technology, specifically to a back-spray structure for a universal molded pump core suction tube accessory, suitable for packaging materials of various daily chemical products such as emulsions and gels. Background Technology

[0002] Liquid daily chemical products (such as shampoo, shower gel, conditioner, hand soap, and skin care products) are generally packaged with manual pump heads for dispensing. These pump heads use a built-in piston, spring, and one-way valve structure to pump the liquid from the container and atomize it or form a liquid column. Based on usage habits and product characteristics, the market has demanded pump heads with "reverse spray" functionality (i.e., the ability to pump out contents even when the container is inverted). This is particularly important for high-viscosity, easily sedimented, or final-stage emptying contents.

[0003] Currently, the backspray structure commonly used in daily chemical packaging materials on the market is mostly achieved by modifying the pump core itself. While this method can achieve the backspray function, it requires the development of dedicated molds for different pump cores, resulting in a wide variety of pump core models, poor versatility, and high production costs. It also increases the complexity of supply chain management and inventory control. In addition, dedicated pump core structures often have limited adaptability and are inconvenient to replace, which is not conducive to large-scale production and rapid market response.

[0004] Therefore, there is an urgent need for a suction tube accessory structure that is compatible with universal mold pump cores and can achieve the reverse spray function without modifying the pump core itself, so as to improve product versatility, reduce production costs and simplify the assembly process. Summary of the Invention

[0005] This invention provides a reverse spray structure for a universal molded pump core's suction tube accessory, aiming to overcome the problems of poor versatility and high cost caused by the need for specialized pump cores in existing daily chemical packaging. This structure, through an internal one-way valve design and dimensional matching, achieves reliable switching between forward and reverse spray functions solely through the suction tube accessory itself, without altering the universal molded pump core.

[0006] The technical solution of this utility model is as follows:

[0007] A reverse spray structure for the suction pipe accessory of a universal molded pump core, characterized by including:

[0008] The main body of the straw accessory (1) has a connection interface on its top for connecting the outlet pipe of the molded pump core (3);

[0009] The main channel runs through the accessory body (1) and forms a socket cavity at the connection interface for accommodating the outlet pipe of the male mold pump core (3);

[0010] A first check valve, located on the suction channel, is configured to allow fluid to flow from bottom to top and prevent fluid from flowing from top to bottom;

[0011] The second check valve is located at the bottom of the accessory body (1);

[0012] The bypass channel is formed by the annular gap between the inner wall of the socket cavity and the outer wall of the outlet pipe of the connected male mold pump core (3). The inlet of the bypass channel is located at the top of the socket cavity, and its outlet is in fluid communication with the inlet of the second one-way valve.

[0013] The outlet of the first check valve is in fluid communication with the bottom of the socket cavity, and the outlet of the second check valve is in fluid communication with the main channel and flows into the channel below the first check valve.

[0014] Furthermore, the first check valve includes a first chamber and a first seal movably disposed therein. The lower part of the first chamber has a first inlet and the upper part has a first outlet. The first seal can disengage from the first sealing position under fluid pressure to open the first inlet, or fall back to the first sealing position to seal the first inlet when there is no fluid pressure.

[0015] Furthermore, the first sealing element is a first sealing ball (2), and the first sealing position is an annular first sealing surface that protrudes inward from the lower part of the first chamber.

[0016] Furthermore, the second check valve includes a second chamber and a second seal movably disposed therein. The top of the second chamber is provided with a second inlet communicating with the bypass channel outlet, and the bottom is provided with a second outlet. The second seal can disengage from the second sealing position under fluid pressure to open the second inlet, or fall back to the second sealing position to seal the second inlet when there is no fluid pressure.

[0017] Furthermore, the second seal is a second sealing ball (4), and the second sealing position is an annular second sealing surface that protrudes inward from the top of the second chamber.

[0018] Furthermore, the straw accessory body (1) has a connecting channel inside, one end of which is connected to the outlet of the bypass channel, and the other end is connected to the inlet of the second one-way valve.

[0019] Furthermore, the inner diameter (E) of the socket cavity is greater than the outer diameter (D) of the outlet pipe of the male mold pump core (3).

[0020] The working process of this utility model consists of two states:

[0021] In the forward spraying state: When the pump core is working normally, the liquid flows from bottom to top under pressure, pushes open the first sealing ball (2), flows through the internal flow channel of the suction pipe accessory body and enters the pump core and is pumped out. At the same time, the liquid backflow pressure acts on the second sealing ball (4), making it stick tightly to the sealing surface to form an effective seal and prevent the liquid from leaking downward.

[0022] In reverse spray state: When the packaging container is inverted, the liquid first flows into the annular gap between the inner wall of the straw accessory body (1) and the outer wall of the molded pump core (3) due to gravity, and flows downward along this gap to the bottom of the straw accessory body. Subsequently, the liquid enters the chamber where the second sealing ball (4) is located through the connecting structure at the bottom, and pushes the sealing ball from top to bottom, changing the flow path and finally flowing into the inlet channel of the molded pump core (3), realizing inverted pumping out. During this process, the backflow force causes the first sealing ball (2) to reset and form a seal, preventing liquid from leaking back.

[0023] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0024] 1) Through the structural design of the suction tube accessories, direct compatibility with existing universal mold pump cores on the market is achieved, eliminating the need to develop a dedicated pump core for the reverse spray function, greatly expanding the product's adaptability. This saves on the high mold development costs and production costs of dedicated pump cores.

[0025] 2) By utilizing the liquid's own flow pressure and backflow force to control the opening and closing of the sealing ball, a reliable one-way valve structure is formed in both forward and reverse spraying states, effectively preventing liquid leakage and ensuring the stability of the discharge.

[0026] 3) This straw accessory has a sophisticated structure, few parts, and a simple assembly process. It can be quickly assembled with the universal mold pump core and packaging bottle, thus improving production efficiency. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the inverted spray structure and forward spray state of the suction pipe accessory of the universal mold pump core of this utility model;

[0028] Figure 2 This is a schematic diagram of the back spray structure of the suction pipe accessory of the universal mold pump core of this utility model in the back spray state;

[0029] In the diagram: 1-Sticker fitting body, 2-First sealing ball, 3-Molded pump core, 4-Second sealing ball. Detailed Implementation

[0030] The specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. These embodiments are only used to more clearly explain the technical solution of this utility model and should not be construed as limiting the scope of protection of this utility model.

[0031] like Figures 1 to 2 As shown, this embodiment provides a suction accessory reverse spray structure that can be used with universal mold pump cores, including a suction accessory body 1, which integrates two sets of one-way valve systems composed of sealing balls. By combining with the universal mold pump core 3, it can realize flexible switching between forward spray and reverse spray functions.

[0032] In this embodiment, the straw accessory body 1 is integrally molded from plastic (such as PP or PE) using an injection molding process. Its top has a standardized interface, the inner diameter of which is interference-fitted or threaded to the outer diameter D of the outlet pipe of the universal mold pump core 3, thus achieving a detachable and tight connection. The straw accessory body 1 has an internal flow channel system. The universal mold pump core 3 is commercially available, and its internal structure is no different from a typical push-button pump core. A first sealing ball 2 is placed inside a first chamber formed within the straw accessory body 1. This first chamber is located in the middle of the flow channel, with an inlet at its lower part leading to the bottom of the container and an inlet at its upper part leading to the universal mold pump core 3. The inner diameter of the first chamber is slightly larger than the diameter of the first sealing ball 2, allowing it to move freely while still forming a seal at a specific position. The lower part of the first chamber has an inwardly protruding annular first sealing surface for sealing by the first sealing ball 2. A second sealing ball 4 is placed inside a second chamber formed at the bottom of the straw accessory body 1. The top of this second chamber is connected to the main flow channel via a connecting channel, and its bottom is the liquid outlet. Similarly, the inner diameter of the second chamber is slightly larger than the diameter of the second sealing ball 4, and its top is also provided with an inwardly protruding annular second sealing surface. The inner wall diameter E of the middle part of the flow channel of the suction tube accessory body 1 is larger than the outer diameter D of the outlet pipe of the connected male mold pump core 3. After the two are assembled, an annular gap flow channel is formed. This gap flow channel is the path to achieve the back spray function.

[0033] The workflow of this utility model is as follows:

[0034] Forward spraying: The container is upright, as shown in the image. Figure 1 As shown: When the user presses the pump head, the pump core piston moves, generating positive pressure at its outlet and negative pressure (suction) at its inlet. Pressure is generated inside the molded pump core 3. Liquid is drawn in from the bottom of the container, flows upward, and the pressure pushes open the first sealing ball 2, causing it to move upward and open the passage. The liquid flows into the molded pump core 3 and is finally ejected from the pump nozzle.

[0035] During this process, the backflow force of the liquid and the weight of the second sealing ball 4 work together to press the second sealing ball 4 tightly against the second sealing surface, firmly sealing the connecting channel to the annular gap flow channel, preventing the liquid from leaking downwards, and ensuring that all pressure is used for forward injection.

[0036] Backspray state: The container is inverted, such as... Figure 2As shown: When the user presses the pump head, suction (negative pressure) is generated inside the molded pump core 3. The liquid in the container gathers at the bottle opening under gravity. The liquid first flows into the annular gap channel between the inner wall of the straw accessory body 1 and the outer wall of the molded pump core 3. The liquid flows downwards along this annular gap channel until it reaches the bottom, and then enters the second chamber through the connecting channel. The liquid pressure pushes the second sealing ball 4 downwards, causing it to move and open the channel. The liquid then flows out from the bottom outlet of the second chamber, then enters the inlet of the molded pump core 3, and is finally pumped out.

[0037] During this process, the force of the liquid and the weight of the first sealing ball 2 work together to press the first sealing ball 2 tightly against the first sealing surface, sealing the forward flow channel, preventing liquid leakage, and ensuring backflow efficiency.

Claims

1. A reverse spray structure for a suction pipe accessory of a universal molded pump core, characterized in that, include: The main body of the straw accessory (1) has a connection interface on its top for connecting the outlet pipe of the molded pump core (3); The main channel runs through the accessory body (1) and forms a socket cavity at the connection interface for accommodating the outlet pipe of the male mold pump core (3); The first check valve, located on the suction main channel, is configured to allow fluid to flow from bottom to top and prevent fluid from flowing from top to bottom; The second check valve is located at the bottom of the accessory body (1); The bypass channel is formed by the annular gap between the inner wall of the socket cavity and the outer wall of the outlet pipe of the connected male mold pump core (3). The inlet of the bypass channel is located at the top of the socket cavity, and its outlet is in fluid communication with the inlet of the second one-way valve. The outlet of the first check valve is in fluid communication with the bottom of the socket cavity, and the outlet of the second check valve is in fluid communication with the main channel and flows into the channel below the first check valve.

2. The backflow structure of the suction pipe accessory of the universal molded pump core according to claim 1, characterized in that, The first check valve includes a first chamber and a first seal movably disposed therein. The lower part of the first chamber has a first inlet and the upper part has a first outlet. The first seal can disengage from the first sealing position under fluid pressure to open the first inlet, or fall back to the first sealing position to seal the first inlet when there is no fluid pressure.

3. The backflow structure of the suction pipe accessory of the universal molded pump core according to claim 2, characterized in that, The first sealing element is a first sealing ball (2), and the first sealing position is an annular first sealing surface that protrudes inward from the lower part of the first chamber.

4. The backflow structure of the suction pipe accessory of the universal molded pump core according to claim 1, characterized in that, The second check valve includes a second chamber and a second seal movably disposed therein. The top of the second chamber is provided with a second inlet communicating with the bypass channel outlet, and the bottom is provided with a second outlet. The second seal can disengage from the second sealing position under fluid pressure to open the second inlet, or fall back to the second sealing position to seal the second inlet when there is no fluid pressure.

5. The backflow structure of the suction pipe accessory of the universal molded pump core according to claim 4, characterized in that, The second seal is a second sealing ball (4), and the second sealing position is an annular second sealing surface that protrudes inward from the top of the second chamber.

6. The backflow structure of the suction pipe accessory for the universal molded pump core according to any one of claims 1-5, characterized in that, The straw accessory body (1) has a connecting channel inside. One end of the connecting channel is connected to the outlet of the bypass channel, and the other end is connected to the inlet of the second one-way valve.

7. The backflow structure of the suction pipe accessory for the universal molded pump core according to any one of claims 1-5, characterized in that, The inner diameter (E) of the socket cavity is greater than the outer diameter (D) of the outlet pipe of the molded pump core (3).

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