Contamination-proof squeeze pump

Abstract

The utility model relates to the field of press pump, especially a kind of anti-pollution press pump.The press pump includes body and main column, the body is equipped with sliding cavity, the body top is fixedly connected with lock cover, the main column passes through lock cover and extends into sliding cavity, the main column bottom is fixedly connected with piston, the piston is dynamically sealed with sliding cavity, the body lateral wall is equipped with the air hole that communicates with sliding cavity, the air hole is located between piston and lock cover, the piston and main column synchronous slide up and down, when the piston slides up to maximum distance, the piston partially hides the air hole.When pump head is bounced, liquid can be backflowed from air hole to bottle, avoid spring being contaminated, double air hole can also increase air intake, make press more light, simple and practical structure, reduce parts, save cost.

Description

Technical Field

[0001] This utility model relates to the field of push pumps, and in particular to a pollution-proof push pump. Background Technology

[0002] Contamination of the metal spring in a push pump with liquid can affect its performance. Therefore, physically isolating the liquid from the spring can improve the durability of the push pump head.

[0003] For example, Chinese utility model patent CN216187531 U discloses a press pump for preventing liquid from entering the air inlet, including threads, body, locking cover, push head, main column, secondary column, piston, spring and glass ball, and also includes a liquid-proof seal, which includes a sliding sleeve, an annular seat plate and a cylindrical sealing ring; the main column passes through the guide hole of the locking cavity and the sliding sleeve of the liquid-proof seal, and the annular drive platform cooperates with the upper end of the sliding sleeve. In the locked state, the liquid-proof seal covers the air inlet, and in the unlocked state, the piston covers the air inlet to prevent liquid from contaminating the spring.

[0004] The problem with existing technology is that it requires an additional liquid-proof seal to plug the air inlet, resulting in a complex structure and increased production costs. Therefore, there is still room for improvement in existing technology. Utility Model Content

[0005] To solve the above-mentioned technical problems, the purpose of this utility model is to provide a pollution-proof push pump that avoids liquid contamination of the spring and saves costs.

[0006] The technical solution adopted by this utility model to solve the problem is: a pollution-proof press pump, comprising,

[0007] The main body and the main column are provided. The main body is provided with a sliding cavity. A lock cover is fixedly connected to the top of the main body. The main column passes through the lock cover and extends into the sliding cavity. A piston is fixedly connected to the bottom of the main column. The piston is dynamically sealed to the sliding cavity.

[0008] The main body has an air hole on its side wall that communicates with the sliding cavity. The air hole is located between the piston and the lock cover. The piston and the main column slide up and down synchronously. When the piston slides up to the maximum distance, the piston part covers the air hole.

[0009] As a further improvement to the above technical solution, there are two or more air holes, which are arranged in parallel and adjacent to each other, and the portion of the air hole that the piston can cover is less than or equal to half of the air hole area.

[0010] As a further improvement to the above technical solution, the top of the lock cover is provided with a toothed buckle, which is screwed to the main post. The lock cover is provided with a locking cavity that extends into the sliding cavity. The center of the bottom plate of the lock cover is provided with a guide hole, and the main post is slidably connected in the guide hole.

[0011] As a further improvement to the above technical solution, a spring mounting groove is provided on the outer side wall of the main column, and a spring is provided in the spring mounting groove. The lower end of the spring is engaged with the bottom plate of the lock cover, and the main column and the lock cover are elastically connected.

[0012] As a further improvement to the above technical solution, a secondary column is inserted into the bottom end of the main column, the main column is provided with a liquid outlet channel, and the secondary column is provided with a side liquid inlet hole communicating with the liquid outlet channel.

[0013] As a further improvement to the above technical solution, a suction pipe is inserted into the bottom of the main body, and a one-way valve is provided at the bottom of the sliding cavity. During the piston movement, the one-way valve controls the connection or disconnection between the suction pipe and the liquid outlet channel.

[0014] As a further improvement to the above technical solution, a pressing head is fixedly connected to the top of the main column, and a liquid outlet is provided inside the pressing head, which is connected to the liquid outlet channel.

[0015] As a further improvement to the above technical solution, a waterproof cover is also included, which is fixedly connected to the lock cover and seals the locking cavity.

[0016] The beneficial effects of this utility model are: by changing the setting position of the air hole and using the piston part to cover the air hole, when the pump head pops open, the liquid in the inner cavity of the pump body can flow back into the bottle through the air hole, avoiding contamination of the spring. Multiple air holes can also increase the air intake of the sliding chamber, making the pressing lighter. The structure is simple and practical, reducing the number of parts and saving costs. Attached Figure Description

[0017] The present invention will be further explained below with reference to the accompanying drawings and specific embodiments.

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0019] Figure 2 This is a cross-sectional view of the main body of this utility model;

[0020] Figure 3 This is a cross-sectional view of the secondary column of this utility model;

[0021] Figure 4 This is a cross-sectional view of the lock cover of this utility model;

[0022] Figure 5 This is a top view of the present invention;

[0023] Figure 6 This is a cross-sectional view (AA) of the present invention in the pressed state;

[0024] Figure 7This is a cross-sectional view of the BB in the springback state of this utility model;

[0025] Figure 8 for Figure 7 Enlarged view of point C.

[0026] In the diagram: 1-body, 11-sliding cavity, 12-air hole, 2-main column, 21-liquid outlet channel, 22-spring mounting groove, 23-secondary column, 231-side liquid inlet hole, 3-locking cover, 31-locking cavity, 32-guide hole, 33-tooth, 4-piston, 5-spring, 6-one-way valve, 7-pressing head, 71-liquid outlet nozzle, 8-waterproof cover, 9-suction pipe. Detailed Implementation

[0027] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0028] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional 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.

[0029] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0030] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0031] Reference Figure 1 , Figure 2 and Figure 8 A pollution-proof press pump includes a body 1 and a main column 2. The body 1 has a sliding cavity 11. A locking cover 3 is fixedly connected to the top of the body 1. The main column 2 passes through the locking cover 3 and extends into the sliding cavity 11. A piston 4 is fixedly connected to the bottom of the main column 2. The piston 4 is dynamically sealed to the sliding cavity 11.

[0032] The side wall of the main body 1 is provided with an air hole 12 that communicates with the sliding cavity 11. The air hole 12 is located between the piston 4 and the lock cover 3. The piston 4 and the main column 2 slide up and down synchronously. When the piston 4 slides up to the maximum distance, the piston 4 partially covers the air hole 12.

[0033] There are two or more vents 12, which are arranged in parallel and adjacent to each other. The portion of the piston 4 that can cover the vents 12 is less than or equal to half the area of ​​the vents 12.

[0034] When the bottle is tilted or fully filled with liquid, liquid may enter the sliding chamber 11 through the vent 12, posing a risk of contamination to the spring 5. To mitigate this risk, when the pressing head 7 rebounds, the main column 2 drives the piston 4 to slide upwards. The space between the piston 4 and the locking cap 3 is gradually compressed, and the liquid in the sliding chamber 11 is gradually discharged and flows back into the bottle through the vent 12. When the piston 4 slides to its maximum distance, it only partially blocks the vent 12, allowing the remaining small amount of liquid to be discharged, reducing the risk of liquid contact with the spring 5. The structure is simple and practical, eliminating the need for additional parts to block the vent 12, thus saving costs.

[0035] Preferred, refer to Figures 4 to 6 The top of the lock cover 3 is provided with a toothed buckle 33, which is screwed to the main post 2. The lock cover 3 is provided with a locking cavity 31, which extends into the sliding cavity 11. The center of the bottom plate of the lock cover 3 is provided with a guide hole 32, and the main post 2 is slidably connected in the guide hole 32.

[0036] The locking cover 3 is screwed into the body 1, and together with the main column 2, it seals the upper end of the sliding cavity 11 to ensure the airtightness of the pump and prevent leakage.

[0037] The outer wall of the main column 2 is provided with a spring 5 mounting groove 22, and a spring 5 is provided in the spring 5 mounting groove 22. The lower end of the spring 5 is engaged with the bottom plate of the lock cover 3, and the main column 2 and the lock cover 3 are elastically connected.

[0038] The upper and lower ends of the spring 5 are connected to the upper wall of the spring 5 mounting groove 22 and the bottom plate of the lock cover 3, respectively. When pressed, the main column 2 slides down with the pressing head 7, compressing the spring 5. After the force disappears, the spring 5 is released, pushing the main column 2 and the pressing head 7 to reset.

[0039] Preferred, refer to Figure 3 A secondary column 23 is inserted into the bottom of the main column 2. The main column 2 is provided with a liquid outlet channel 21, and the secondary column 23 is provided with a side liquid inlet hole 231 that communicates with the liquid outlet channel 21.

[0040] A suction pipe 9 is inserted into the bottom of the main body 1, and a one-way valve 6 is provided at the bottom of the sliding cavity 11. During the movement of the piston 4, the one-way valve 6 controls the connection or disconnection between the suction pipe 9 and the liquid outlet channel 21.

[0041] A pressing head 7 is fixedly connected to the top of the main column 2. The pressing head 7 is provided with a liquid outlet 71, which is connected to the liquid outlet channel 21.

[0042] When pressed down, piston 4 moves downward, the space between piston 4 and locking cover 3 increases, air enters through air hole 12, the pressure in sliding chamber 11 decreases, there is a pressure difference between sliding chamber 11 and suction pipe 9, one-way valve 6 is opened under pressure, liquid enters between piston 4 and one-way valve 6; when pressing head 7 rebounds and resets, it drives piston 4 to move upward, liquid enters liquid outlet channel 21 through side liquid inlet hole 231 of auxiliary column 23, and is pumped out from liquid outlet 71, the pressure difference between sliding chamber 11 and suction pipe 9 decreases, and one-way valve 6 closes.

[0043] It also includes a waterproof cap 8, which is fixedly connected to the locking cap 3, and the waterproof cap 8 seals the locking cavity 31. This prevents water from entering the pump body and contaminating the liquid inside the bottle, while also preventing liquid from leaking out from the gaps in the pump body.

[0044] The above are merely preferred embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent structural transformations made based on the inventive concept of this utility model and the contents of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are included within the patent protection scope of this utility model.

Claims

1. A pollution-proof push-button pump, characterized in that, include: The main body (1) and the main column (2) are provided. The main body (1) is provided with a sliding cavity (11). The top of the main body (1) is fixedly connected with a lock cover (3). The main column (2) passes through the lock cover (3) and extends into the sliding cavity (11). The bottom of the main column (2) is fixedly connected with a piston (4). The piston (4) is dynamically sealed to the sliding cavity (11). The main body (1) has an air hole (12) on its side wall that communicates with the sliding cavity (11). The air hole (12) is located between the piston (4) and the lock cover (3). The piston (4) slides up and down synchronously with the main column (2). When the piston (4) slides up to the maximum distance, the piston (4) partially covers the air hole (12).

2. The anti-pollution push pump as described in claim 1, characterized in that: There are two or more air holes (12), and the air holes (12) are arranged in parallel adjacent to each other. The portion of the air hole (12) that the piston (4) can cover is less than or equal to half of the area of ​​the air hole (12).

3. The anti-pollution push pump as described in claim 1, characterized in that: The top of the lock cover (3) is provided with a snap fastener (33), which is screwed to the main post (2). The lock cover (3) is provided with a locking cavity (31), which extends into the sliding cavity (11). The bottom plate of the lock cover (3) is provided with a guide hole (32), and the main post (2) is slidably connected in the guide hole (32).

4. The anti-pollution push pump as described in claim 3, characterized in that: The outer wall of the main column (2) is provided with a spring mounting groove (22), and a spring (5) is provided in the spring mounting groove (22). The lower end of the spring (5) is engaged with the bottom plate of the lock cover (3), and the main column (2) and the lock cover (3) are elastically connected.

5. The anti-pollution push pump as described in claim 1, characterized in that: A secondary column (23) is inserted into the bottom end of the main column (2). The main column (2) is provided with a liquid outlet channel (21), and the secondary column (23) is provided with a side liquid inlet hole (231) that communicates with the liquid outlet channel (21).

6. The anti-pollution push pump as described in claim 5, characterized in that: A suction pipe (9) is inserted into the bottom of the body (1), and a one-way valve (6) is provided at the bottom of the sliding cavity (11). During the movement of the piston (4), the one-way valve (6) controls the suction pipe (9) to connect or disconnect from the liquid outlet channel (21).

7. The anti-pollution push pump as described in claim 5, characterized in that: The top of the main column (2) is fixedly connected to a pressing head (7), and the pressing head (7) is provided with a liquid outlet (71), which is connected to the liquid outlet channel (21).

8. A pollution-proof push-button pump as described in claim 3, characterized in that: It also includes a waterproof cover (8), which is fixedly connected to the lock cover (3) and seals the locking cavity (31).

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