A hand press pump

Abstract

The utility model discloses a kind of manual pressing pumps, including pressure pipe, piston and pump shell, the center communication of pressure pipe and piston, pump shell includes shell body and second butt joint pipe, second butt joint pipe is connected with straw, piston reciprocates in the lower section of shell body;The lower surface of the piston is connected with tray, the center of tray is provided with center hole, first tablet includes center part, connecting strip and edge part, center part is connected with first chamber inner wall, the both ends of connecting strip are connected with center part, edge part respectively, center part is stacked on center hole;The bottom of the pump shell is provided with second tablet, and is stacked on the top end of second butt joint pipe.When piston descends, the space of inner cavity gradually reduces, and second tablet seals second butt joint pipe.Liquid in inner cavity impacts center part, and liquid passes between center part, connecting strip and edge part, and enters pressure pipe.From the nozzle, it is sprayed out.Its structure is simple, the cross section of slot is large, and the flow of liquid is large.

Description

Technical Field

[0001] This utility model relates to a manual press pump, and more particularly to its one-way valve, belonging to the field of pump technology. Background Technology

[0002] Manual push-button pumps are commonly used in cosmetic packaging bottles and pesticide spraying devices. Once the internal liquid is depleted, the bottle, spraying device, and push-button pump are discarded. Manual push-button pumps include several one-way valves. One-way valves have drawbacks such as complex structure. Utility Model Content

[0003] To overcome the above-mentioned shortcomings, the purpose of this utility model is to provide a manual press pump that is different from the prior art.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is: a manual press pump, including a nozzle, a pressure tube, a piston and a pump housing. The two ends of the pressure tube are respectively connected to the center of the nozzle and the center of the piston. The pump housing includes a housing body and a second pair of connecting pipes. A suction tube is connected to the second pair of connecting pipes. The edge of the piston is slidably connected to the inner wall of the housing body. The piston reciprocates in the lower section of the housing body.

[0005] A tray is connected to the lower surface of the piston, and a central hole is provided in the center of the tray. A first chamber is formed between the piston and the tray. A first pressure plate is provided in the first chamber. The first pressure plate includes a central part, a connecting strip and an edge part. The central part is connected to the inner wall of the first chamber. The two ends of the connecting strip are connected to the central part and the edge part respectively. The central part is stacked on the central hole. A second pressure plate is provided at the bottom of the pump housing. The second pressure plate has the same structure as the first pressure plate. The second pressure plate is stacked on the top of the second pair of connecting pipes.

[0006] The present invention is further configured such that: the piston and the lower section of the shell body form an inner cavity, and a spring is provided in the inner cavity, one end of the spring abutting against the bottom end of the shell body, and the other end pushing the piston upward.

[0007] The present invention is further configured such that: the end cap includes a sealing plate, a first pair of connecting pipes and a guide pipe, the first pair of connecting pipes and the guide pipe are connected to the lower surface of the sealing plate, the sealing plate is connected to the upper end of the shell body, and the pressure pipe is slidably connected to the inner side of the first pair of connecting pipes.

[0008] The present invention is further configured such that: the pump casing also includes an edge plate, the edge plate is connected to the top of the casing body, and a nut is provided between the top of the casing body and the sealing plate.

[0009] The present invention is further configured such that: a vertical groove is provided on the inner wall of the guide tube, and a protrusion is provided on the outer side of the pressure tube, the protrusion sliding in the vertical groove.

[0010] The present invention is further configured such that: a horizontal groove is provided at the top edge of the inner wall of the guide tube, the horizontal groove is connected to the vertical groove, and the protrusion slides in the horizontal groove.

[0011] A further feature of this invention is that the upper section of the shell body is provided with a breathing hole.

[0012] The present invention is further configured such that: the connecting strip and the edge portion are both arc-shaped with the center portion as the center; a groove is provided between the center portion, the connecting strip and the edge portion, and the groove is arc-shaped with an arc radius of less than 2 / 3π.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: When the piston descends in the shell body, the space inside the cavity gradually shrinks, creating a positive pressure inside the cavity, and the second pressure plate seals the second pair of connecting pipes. The liquid in the cavity impacts the central part, increasing the distance between the central part and the central hole. The liquid passes through the central part, the connecting strip, and the edge part, entering the pressure pipe. Finally, it is ejected from the nozzle. When the piston rises in the shell body, the central part covers the central hole. A negative pressure is formed in the cavity, and the liquid enters the cavity through the suction pipe and the second pair of connecting pipes. The second pressure plate is impacted by the liquid, creating a gap between it and the second pair of connecting pipes. The liquid passes through the gap and enters the shell body. The first and second pressure plates used in this utility model have simple structures, large cross-sections of the slots, and large liquid flow rates, representing an improvement.

[0014] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of a manual push pump according to a preferred embodiment of the present invention;

[0016] Figure 2 This is a structural diagram of the end cap and pump casing;

[0017] Figure 3 This is a schematic diagram of the pressure tube and piston.

[0018] Figure 4 This is a schematic diagram of the structure of the first tablet.

[0019] In the diagram: 1. Nozzle; 2. Pressure tube; 3. End cap; 4. Nut; 5. Pump housing; 6. Spring; 7. Tray; 8. Piston; 9. First pressure plate; 10. Second pressure plate; 11. Suction tube; 12. Vertical groove; 13. Horizontal groove; 14. Raised strip; 15. Breathing hole; 16. Center hole; 31. Sealing plate; 32. First connecting pipe; 33. Guide tube; 51. Shell body; 52. Inner cavity; 53. Second connecting pipe; 54. Edge plate; 91. Center part; 92. Connecting strip; 93. Edge part; 94. Groove. Detailed Implementation

[0020] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the scope of protection of the present invention.

[0021] See appendix Figure 1-4 As shown, a manual press pump in this embodiment includes a nozzle 1, a pressure tube 2, a piston 8, and a pump housing 5. The two ends of the pressure tube 2 are respectively connected to the center of the nozzle 1 and the center of the piston 8. The pump housing 5 includes a housing body 51 and a second pair of connecting tubes 53. A suction tube 11 is connected to the second pair of connecting tubes 53. The edge of the piston 8 is slidably connected to the inner wall of the housing body 51, and the piston 8 reciprocates in the lower section of the housing body 51. A tray 7 is connected to the lower surface of the piston 8. A central hole 16 is provided in the center of the tray 7. A first chamber is formed between the piston 8 and the tray 7. A first pressing plate 9 is provided in the first chamber. The first pressing plate 9 includes a central part 91, a connecting strip 92, and an edge part 93. The central part 91 is connected to the inner wall of the first chamber. The two ends of the connecting strip 92 are respectively connected to the central part 91 and the edge part 93. The central part 91 is stacked on the central hole 16. A second pressing plate 10 is provided at the bottom of the pump housing 5. The second pressing plate 10 has the same structure as the first pressing plate 9 and is stacked on the top of the second pair of connecting tubes 53. The connecting strip 92 and the edge portion 93 are both arc-shaped, with the center portion 91 as the center; a groove 94 is provided between the center portion 91, the connecting strip 92 and the edge portion 93. The groove (94) is arc-shaped with an arc radius of less than 2 / 3π.

[0022] The piston 8 and the lower section of the shell body 51 enclose each other to form an inner cavity 52. ​​A spring 6 is provided in the inner cavity 52. ​​One end of the spring 6 abuts against the bottom end of the shell body 51, and the other end pushes the piston 8 to rise.

[0023] The end cap 3 includes a sealing plate 31, a first connecting pipe 32, and a guide pipe 33. The first connecting pipe 32 and the guide pipe 33 are connected to the lower surface of the sealing plate 31. The sealing plate 31 is connected to the upper end of the shell body 51. The pressure pipe 2 is slidably connected to the inner side of the first connecting pipe 32. A vertical groove 12 is provided on the inner wall of the guide pipe 33, and a protrusion 14 is provided on the outer side of the pressure pipe 2. The protrusion 14 slides in the vertical groove 12. A horizontal groove 13 is also provided on the top edge of the inner wall of the guide pipe 33. The horizontal groove 13 is connected to the vertical groove 12, and the protrusion 14 slides in the horizontal groove 13.

[0024] The pump housing 5 also includes an edge plate 54, which is connected to the top of the housing body 51. A nut 4 is provided between the top of the housing body 51 and the sealing plate 31. A vent 15 is provided in the upper section of the housing body 51.

[0025] In summary, the method of using the manual press pump shown in this utility model is as follows: When the piston 8 descends in the housing body 51, the space of the inner cavity 52 gradually shrinks, and the inner cavity 52 is under positive pressure. The second pressure plate 10 closes the second connecting pipe 53. The liquid in the inner cavity 52 impacts the central part 91, increasing the distance between the central part 91 and the central hole 16. The liquid passes between the central part 91, the connecting strip 92, and the edge part 93, and enters the pressure tube 2. Finally, it is ejected from the nozzle 1. When the piston 8 rises in the housing body 51, the central part 91 covers the central hole 16. A negative pressure is formed in the inner cavity 52, and the liquid enters the inner cavity 52 through the suction tube 11 and the second connecting pipe 53. The second pressure plate 10 is impacted by the liquid, forming a gap between it and the second connecting pipe 53. The liquid passes through the gap and enters the housing body 51. The first pressure plate 9 and the second pressure plate 10 used in this utility model have simple structures, a large cross-section of the slot 94, and a large liquid flow rate, which is an improvement. By using spring 6, the piston 8 automatically returns to its initial position due to the spring force of spring 6. The sealing plate 31 is connected to the upper end of the shell body 51, forming a stable structure and guiding the pressure tube 2. During normal use, the protrusion 14 slides in the vertical groove 12, and the pressure tube 2 can only move up and down. During transportation, the protrusion 14 is in the horizontal groove 13, overcoming the external force on the nozzle 1 and pressure tube 2, and the position of the piston 8 in the shell body 51 remains unchanged. This prevents liquid from being pumped out. Assembly is completed by screwing the nut 4 onto the container opening. The breather hole 15 is used to maintain atmospheric pressure inside the container, preventing negative pressure from forming in the container after liquid is gradually pumped out, which could cause the container to deform.

[0026] The above embodiments are only for illustrating the technical concept and features of this utility model. Their purpose is to enable those skilled in the art to understand the content of this utility model and implement it. They cannot be used to limit the protection scope of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be covered within the protection scope of this utility model.

Claims

1. A manual press pump, comprising a nozzle (1), a pressure tube (2), a piston (8) and a pump housing (5), wherein the two ends of the pressure tube (2) are respectively connected to the center of the nozzle (1) and the center of the piston (8), the pump housing (5) comprises a housing body (51) and a second pair of connecting pipes (53), wherein a suction tube (11) is connected to the second pair of connecting pipes (53), the edge of the piston (8) is slidably connected to the inner wall of the housing body (51), and the piston (8) reciprocates in the lower section of the housing body (51); Its features are, A tray (7) is connected to the lower surface of the piston (8). A central hole (16) is provided in the center of the tray (7). A first chamber is formed between the piston (8) and the tray (7). A first pressure plate (9) is provided in the first chamber. The first pressure plate (9) includes a central part (91), a connecting strip (92) and an edge part (93). The central part (91) is connected to the inner wall of the first chamber. The two ends of the connecting strip (92) are connected to the central part (91) and the edge part (93) respectively. The central part (91) is stacked on the central hole (16). A second pressure plate (10) is provided at the bottom of the pump housing (5). The second pressure plate (10) has the same structure as the first pressure plate (9). The second pressure plate (10) is stacked on the top of the second connecting pipe (53).

2. The manual squeeze pump of claim 1, wherein The piston (8) and the lower section of the shell body (51) enclose each other to form an inner cavity (52). A spring (6) is provided in the inner cavity (52). One end of the spring (6) abuts against the bottom end of the shell body (51), and the other end pushes the piston (8) to rise.

3. The manual squeeze pump of claim 2, wherein, The manual press pump also includes a head (3), which includes a sealing plate (31), a first pair of connecting pipes (32) and a guide pipe (33). The first pair of connecting pipes (32) and the guide pipe (33) are connected to the lower surface of the sealing plate (31). The sealing plate (31) is connected to the upper end of the shell body (51). The pressure pipe (2) is slidably connected to the inner side of the first pair of connecting pipes (32).

4. The manual squeeze pump of claim 3, wherein, The pump housing (5) also includes an edge plate (54), which is connected to the top of the housing body (51). A nut (4) is provided between the top of the housing body (51) and the sealing plate (31).

5. The manual squeeze pump of claim 4, wherein, A vertical groove (12) is provided on the inner wall of the guide tube (33), and a protrusion (14) is provided on the outer side of the pressure tube (2), and the protrusion (14) slides in the vertical groove (12).

6. The manual squeeze pump of claim 5, wherein, The top edge of the inner wall of the guide tube (33) is also provided with a horizontal groove (13), which is connected to the vertical groove (12), and the protrusion (14) slides in the horizontal groove (13).

7. The manual squeeze pump of claim 6, wherein, The upper section of the shell body (51) is provided with a breathing hole (15).

8. The manual squeeze pump of claim 1, wherein The connecting strip (92) and the edge portion (93) are both arc-shaped with the center portion (91) as the center; a groove (94) is provided between the center portion (91), the connecting strip (92) and the edge portion (93), and the groove (94) is arc-shaped with an arc radius of less than 2 / 3π.

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