ALL-PLASTIC EMULSION PUMP

Abstract

An all-plastic emulsion pump is disclosed, including a body (1), threads (3), a pressing head (2), a main column (5), a suction tube (4), a plastic spring (6), a pull rod (7), a stop (71), a locking cap (8), a first one-way valve device and a second one-way valve device, which are respectively made of plastic material. The main column (5) is connected to the pressing head (2), the plastic spring (6) is located in the body (1) to lift the main column (5), and the plastic spring (6) connects the main column (5) and the inlet (11) of the body (1) to form a channel for the liquid to flow. A communication port (61) is provided between the plastic spring (6) and the main column (5), the pull rod (7) is located in the plastic spring (6) and passes through the communication port (61), and the stop (71) is connected to the upper end of the pull rod (7).When the plastic spring (6) is pressed down, there is a gap between the pull rod (7) and the side wall of the communication port (61); when the plastic spring (6) rises, the stop (71) blocks and seals the communication port (61). The first one-way valve device is provided between the pressing head (2) and the main column (5) to supply the emulsion in the main column (5) to the pressing head (2), and the second one-way valve device is provided between the plastic spring (6) and the inlet (11) of the body (1) to supply the emulsion from the inlet (11) of the body (1) to the plastic spring (6). The all-plastic emulsion pump is environmentally safe and convenient for recycling.

Description

1 / 19 ALL-PLASTIC EMULSION PUMP TECHNICAL FIELD

[001] The invention relates to an all-plastic emulsion pump. FUNDAMENTALS

[002] Currently, emulsion pumps on the market are mainly composed of a pressing head (or elbow), a locking cap, a metal spring, a screw cap, a body, a main column, a piston, an auxiliary column and a glass ball, such as the emulsion pump registered in patent no. 201020679937.3 published in the Chinese patent documentation.The emulsion pump includes a pressing head, a locking cap, a gasket, a spring, a screw cap, a body, a main column, a piston, an auxiliary column, a glass ball, and a suction tube, wherein an inner cylinder in the middle of the pressing head is connected to an upper part of the main column; an outer cylinder in the middle of the pressing head is annularly coated in a cylinder on the upper part of the screw cap; the screw cap is connected to the locking cap; an inner wall of the screw cap is provided with threads matching a bottle opening; two ends of the spring respectively rest against the main column and the locking cap; the spring is arranged in an annular cylindrical cavity outside a wall of the main column.Because of the metal spring contained within the emulsion pump's structure, it is difficult to meet environmental control standards for the export market, especially for the European and American markets. Although an emulsion pump contains plastic, metal, and glass parts simultaneously, it needs to be disassembled and sorted for recovery, which does not favor product recovery. Furthermore, a piston is used, and an internal cavity in the body serves as a pump cavity for the piston to move up and down. The emulsion enters the internal cavity of the body from the suction tube through the ball. Petition 870220055538, dated 06 / 24 / 2022, pp. 76 / 95 2 / 19 glass, and enters the main column through the piston and auxiliary column, and flows out of the pressing head. In the initial state, it is necessary to inject a small amount of lubricating fluid that does not conflict with the emulsion in terms of properties to lubricate the piston, so that the piston can move smoothly in the internal cavity of the body at the beginning of use.

[003] The invention is based on this situation. SUMMARY

[004] The technical problem to be solved by the invention is to provide an emulsion pump made entirely of plastic, in which all parts of the emulsion pump are made of plastic material, which is easy to meet high environmental requirements, easy to recycle and which does not require the use of a piston and a lubricating liquid for this purpose.

[005] To solve the above technical problems, an all-plastic emulsion pump of the invention includes a body and a pressing head, wherein an upper end of the body is provided with threads, a lower end of the body is provided with a suction tube communicating with an inlet of the lower end of the body, the pressing head is connected to a main column inserted in the body, a plastic spring capable of lifting the pressing head and the main column is provided in an internal cavity of the body, the plastic spring is located below the main column, the plastic spring is in a sealed connection with the main column, the plastic spring is a plastic spring tube with open upper and lower ends and sealed sides, an upper end of the plastic spring is in communication with the main column,and the lower end of the plastic spring is in communication with the body inlet so that the plastic spring forms a channel to connect the main column with the body inlet and for the liquid to flow; a communication port is provided between the plastic spring and the main column to allow the plastic spring to move upwards and downwards, the body is internally provided with a traction rod located, Petition 870220055538, dated 06 / 24 / 2022, pp. 77 / 95 3 / 19 inside the plastic spring, the pull rod corresponds up and down with the communication port and is able to penetrate outside the communication port when the plastic spring is pressed down, and there is a gap between the pull rod and the side wall of the communication port; an upper end of the pull rod is provided with a stop located above the communication port, and the stop is able to press the communication port from above when the plastic spring is lifted to pull down the plastic spring and the main column, and seal the communication port; an upper opening of the body is provided with a locking cap that is able to limit the plastic spring in the body; a first one-way valve device is provided between the pressing head and the main column, which allows the emulsion in the main column to flow to the pressing head and prevents the emulsion in the pressing head from flowing to the main column;A second one-way valve device is provided between the plastic spring and the body inlet, which allows the emulsion to flow into the plastic spring from the body inlet and prevents the emulsion in the plastic spring from flowing out of the body inlet; the body, the threads, the pressing head, the main column, the suction tube, the plastic spring, the pull rod, the stop, the locking cap, the first one-way valve device and the second one-way valve device are respectively made of plastic material.

[006] In the all-plastic emulsion pump, the locking cap is coated outside the main column, and a waterproof sleeve is provided between the locking cap and the main column to block a gap between the upper end of the locking cap and the main column.

[007] In the all-plastic emulsion pump, the plastic spring and the main column are in a snap-fit ​​connection, which is able to prevent the plastic spring and the main column from separating up and down.

[008] In the all-plastic emulsion pump, the end Petition 870220055538, dated 06 / 24 / 2022, pp. 78 / 95 The upper 4 / 19 of the plastic spring is provided with an annular fastening portion inserted into the main column from a lower port of the main column; an outer side surface of the fastening portion is in a sealing connection with an inner side surface of the main column, and the communication port is provided in the plastic spring and is located within the fastening portion; the fastening portion is provided with a second buckling ring projecting from an outer side of the fastening portion, and an inner wall of the main column is provided with a second buckling groove that is recessed and buckled with the second buckling ring.

[009] In the all-plastic emulsion pump, the upper end of the plastic spring is provided with an annular end surface that is positioned outside the clamping portion and is able to fit hermetically to a lower face of the main column; when the main column is pressed down, the lower end face of the main column presses against the annular end surface and forms a seal between the two end faces.

[0010] In the all-plastic emulsion pump, the internal holes of the lower ends of the clamping portion and the main column are circular; the second buckling ring and the second buckling groove are correspondingly annular, and the main column is rotatable relative to the plastic spring under the action of an external force; a guide structure to guide an up and down movement of the main column is disposed between the locking cap and the main column and, when the main column rotates relative to the locking cap, the guide structure becomes misaligned and prevents the up and down movement of the main column.

[0011] In the all-plastic emulsion pump, the guide structure includes a guide groove arranged in the locking cap, and the main column is provided with a guide column for guiding up and down in cooperation with the guide groove; one side of an upper end of the guide groove is provided with a locking groove that is recessed and Petition 870220055538, dated 06 / 24 / 2022, pp. 79 / 95 5 / 19 can be configured so that the guide column rotates out of the guide groove and then snaps into place after the main column rises, and a lower locking groove is located below the guide column and limits the downward movement of the guide column.

[0012] In the all-plastic emulsion pump, the first one-way valve device includes a first valve core, the main column is provided internally with a main column outlet in communication with the pressing head, the first valve core includes a first outer ring fixed between the pressing head and the main column, an inner side of the first outer ring is provided with a first inner core isolated from the first outer ring and covering the main column outlet on a side close to the pressing head, and the first outer ring and the first inner core are elastically connected by means of a first rib, so that the first inner core is able to float upwards when a lower part of the inner core is pressed so as to open the main column outlet.

[0013] In the all-plastic emulsion pump, a sealing seat is provided between the plastic spring and the body to connect the plastic spring with the body in a sealed manner; a lower end of the pull rod is fixed in the sealing seat, a lower part of the sealing seat is provided with a lower cavity, the sealing seat is provided with an orifice that communicates the plastic spring with the lower cavity, the lower cavity is communicated with the inlet of the body.

[0014] In the all-plastic emulsion pump, the second one-way valve device includes a second valve core, the second valve core is located in the lower cavity, the second valve core includes a second outer ring fixed between the sealing seat and the body, an inner side of the second outer ring is provided with a second inner core isolated from the second outer ring and covering the body inlet on a side close to the lower cavity, and the second outer ring and the Petition 870220055538, dated 06 / 24 / 2022, pp. 80 / 95 6 / 19 of the second inner core are elastically connected via a second rib so that the second inner core is able to float upwards when a lower part of the second inner core is pressed in order to open the body entrance.

[0015] In the all-plastic emulsion pump, the locking cap is located above the plastic spring and, when the plastic spring rises, the locking cap stops the plastic spring from above and sets a maximum height for the plastic spring to rise, the plastic spring is in a compressed state when rising and pressing against the locking cap; a lower end of the plastic spring presses the sealing seat against a lower part of the internal cavity of the body; the sealing seat is provided with a sealing groove into which the lower end of the plastic spring inserts; one face of the lower end of the plastic spring is pressed against a lower part of the sealing groove and is sealed tightly fitted with the lower part of the sealing groove;Under elastic pressure from the plastic spring, a lower surface of the sealing seat is firmly attached to the lower part of the internal body cavity to form a seal with the lower part of the internal body cavity on the lower surface of the sealing seat.

[0016] Compared to the prior art, the invention has the following advantages. 1. The invention provides an all-plastic emulsion pump, each of the parts that make up the emulsion pump is made of a plastic material, which can better meet high-standard environmental requirements and be easily recovered without disassembling and sorting the parts, and eliminate the need for pistons and piston-specific lubricants. 2. The invention adopts a completely new structure, arranging a laterally sealed tubular plastic spring under the main column and connecting the main column and the body inlet through the plastic spring, forming a channel for the emulsion to flow from the body inlet to the Petition 870220055538, dated 06 / 24 / 2022, pp. 81 / 95 7 / 19 main column. By providing the first one-way valve device between the pressing head and the main column, and the second one-way valve device between the plastic spring and the body inlet, a storage cavity is formed to store the emulsion between the main column, the plastic spring, the first one-way valve device, and the second one-way valve device.When the pressing head is pressed under the action of an external force, the plastic spring is compressed and shortened, the volume of the storage cavity becomes smaller and the internal pressure becomes greater, forming a pressure difference with the outside; since the first one-way valve device and the second one-way valve device are both in a one-way circulation structure, the emulsion flows from the storage cavity to the pressing head through the first one-way valve device and flows out from the pressing head. When the external force is released, the main column and the pressing head are lifted under the elastic force of the plastic spring. As the plastic spring expands and becomes longer, the volume of the storage cavity becomes larger and the internal pressure decreases, forming a pressure difference with the outside.The emulsion flows, through the suction tube, into the storage cavity from the body inlet via the second one-way valve device, thus achieving the effect of pumping the emulsion. Meanwhile, by placing a pull rod inside the plastic spring and a stop at the upper end of the pull rod, when the plastic spring rises, the plastic spring and the main column are pulled down, pressing the stop against the communication port. The communication port is then blocked and sealed so that, when the bottle is deformed under pressure, the emulsion in the plastic spring can be prevented from entering the main column through the communication port. Therefore, the emulsion in the main column can be prevented from flowing out after flowing to the pressing head, and the sealing property is good. The stop has a... Petition 870220055538, dated 06 / 24 / 2022, pp. 82 / 95 8 / 19 inverted conical structure, its intermediate and lower parts can be pressed into the communication port so that the sealing property and stability are better. When the pressing head is pressed down, the communication port moves downwards as the main column and plastic spring contract and disengage from the stop, and the emulsion flows from the plastic spring to the main column through a space between the pull rod and the side wall of the communication port. 3. In the invention, the locking cap is located above the plastic spring, and when the plastic spring rises, the locking cap stops the plastic spring from above and sets the maximum height of the spring's ascent; the plastic spring is in a compressed state when rising and pressing the locking cap; the lower end of the plastic spring presses against the sealing seat in the lower part of the body's internal cavity; the sealing seat is provided with a sealing groove into which the lower end of the plastic spring inserts; the face of the lower end of the plastic spring is pressed against the lower part of the sealing groove and is sealably fitted with the lower part of the sealing groove; under the elastic pressure of the plastic spring, the lower surface of the sealing seat firmly attaches to the lower part of the body's internal cavity to form a seal with the lower part of the body's internal cavity on the lower surface of the sealing seat.Since the plastic spring will be compressed by different amounts when in the rising state, in the pressed-down state, or during the rising and pressing process, the sealing seat can always be pressed against the bottom of the body's internal cavity. The sealing seat and the body are always connected in a sealed manner, and the lower end face of the plastic spring is always pressed against the bottom of the sealing groove in a sealed connection. Because the plastic spring is pressed between the locking cap and the sealing seat in the rising state, the frictional force to be overcome for the rotation of the plastic spring and the sealing seat is significant. Petition 870220055538, dated 06 / 24 / 2022, pp. 83 / 95 9 / 19 When the pressing head and the main column are rotated, the main column can be rotated relative to the plastic spring, thus preventing rotation of the plastic spring and the sealing seat. 4. In the invention, the plastic spring is in a compressed state after rising. On the one hand, this can stabilize the position of the pressing head and the main column after rising; on the other hand, after the plastic spring rises, it can cause the traction rod and the stop to pull firmly on the communication port to ensure sealing. Furthermore, when the bottle is deformed under pressure and the pressure of the internal cavity of the plastic spring increases, the upward pressure of the plastic spring is shared through the locking cap to prevent the traction force of the traction rod and the stop from being too great on the communication port. BRIEF DESCRIPTION OF THE DRAWINGS [0 017] The embodiments of the invention will be described in more detail below in conjunction with the drawings, in which: [0 018] Fig. 1 is a cross-sectional view of an all-plastic emulsion pump of the invention in which a pressing head thereof is in a rising state; [0 019] Fig. 2 is a cutaway view of the all-plastic emulsion pump of the invention in which the pressing head thereof is in a pressed state; [0 020] Fig. 3 is a schematic structural diagram of a plastic spring; [0 021] Fig. 4 is a schematic structural diagram of a sealing seat; [00 22] Fig. 5 is a schematic structural diagram of a first valve core and a second valve core; [00 23] Fig. 6 is a schematic structural diagram of a press head; [00 24] Fig. 7 is a schematic structural diagram of a column. Petition 870220055538, dated 06 / 24 / 2022, pp. 84 / 95 10 / 19 main; [00 25] Fig. 8 is a schematic structural diagram of a locking cover. DETAILED DESCRIPTION

[0026] The invention will be described in more detail below with reference to the drawings.

[0027] As shown in Figs. 1 to 8, an all-plastic emulsion pump includes a body 1 and a pressing head 2, wherein an upper end of the body 1 is provided with threads 3 for connection to a bottle, a lower end of the body 1 is provided with a suction tube 4 in communication with an inlet 11 of the lower end of the body 1, the pressing head 2 is connected to a main column 5 inserted into the body 1, a plastic spring 6 which is capable of lifting the pressing head 2 and the main column 5 is provided in an internal cavity of the body 1, the plastic spring 6 is located below the main column 5, the plastic spring 6 is in a sealed connection with the main column 5, the plastic spring 6 is a plastic spring tube with open upper and lower ends and sealed sides, the upper end of the plastic spring 6 is in communication with the main column 5,and the lower end of the plastic spring 6 is in communication with the inlet 11 of the body so that the plastic spring 6 forms a channel to connect the main column 5 with the inlet 11 of the body and for the liquid to flow; a communication port 61 to connect the plastic spring 6 and the main column 5 up and down is provided between the two, the body 1 is provided with a traction rod 7 located inside the plastic spring 6, the traction rod 7 corresponds up and down with the communication port 61 and is able to penetrate outside the communication port 61 when the plastic spring 6 is pressed down, and there is a gap between the traction rod 7 and the side wall of the communication port 61; an upper end of the traction rod 7 is provided with a stop 71 located above the port, Petition 870220055538, dated 06 / 24 / 2022, pages 85 / 95 11 / 19 communication 61, and the stop 71 is capable of pressing the communication port 61 from above when the plastic spring 6 is lifted to pull down the plastic spring 6 and the main column 5, and seal the communication port 61; an upper body port 1 is provided with a locking cap 8 that is capable of limiting the plastic spring 6 in the body 1; a first one-way valve device is provided between the pressing head 2 and the main column 5, which can allow the emulsion in the main column 5 to flow to the pressing head 2 and prevent the emulsion in the pressing head 2 from flowing to the main column 5; A second one-way valve device is provided between the plastic spring 6 and the body inlet 11, which can allow the emulsion to flow into the plastic spring 6 from the body inlet 11 and prevent the emulsion in the plastic spring 6 from flowing out of the body inlet 11;The body 1, the threads 3, the pressing head 2, the main column 5, the suction tube 4, the plastic spring 6, the pull rod 7, the stop 71, the locking cap 8, the first one-way valve device and the second one-way valve device are respectively made of plastic material.

[0028] The all-plastic emulsion pump adopts a completely new structure, arranging a laterally sealed tubular plastic spring 6 under the main column 5 and connecting the main column 5 and the body inlet 11 through the plastic spring 6, a channel is formed for the emulsion to flow from the body inlet 11 to the main column 5. By providing the first one-way valve device between the pressing head 2 and the main column 5, and the second one-way valve device between the plastic spring 6 and the body inlet 11, a storage cavity is formed to store the emulsion between the main column 5, the plastic spring 6, the first one-way valve device and the second one-way valve device. When the pressing head 2 is pressed under the action of an external force, the plastic spring 6 is compressed and shortened, the volume of the storage cavity becomes Petition 870220055538, dated 06 / 24 / 2022, pp. 86 / 95 12 / 19 smaller and the internal pressure becomes higher, forming a pressure difference with the outside. Since the first one-way valve device and the second one-way valve device are both in a one-way circulation structure, the emulsion flows from the storage cavity to the pressing head 2 through the first one-way valve device and flows out from the pressing head 2. When the external force is released, the main column 5 and the pressing head 2 are lifted under the elastic force of the plastic spring 6. As the plastic spring 6 expands and becomes longer, the volume of the storage cavity becomes larger and the internal pressure of the same decreases, forming a pressure difference with the outside.The emulsion flows, through suction tube 4, into the storage cavity from inlet 11 of the body via the second one-way valve device to achieve the effect of pumping the emulsion.

[0029] Meanwhile, by placing a pull rod 7 inside the plastic spring 6 and a stop 71 at the upper end of the pull rod 7, when the plastic spring 6 rises, the plastic spring 6 and the main column 5 are pulled down by pressing the stop 71 against the communication port 61, and the communication port 61 is blocked and sealed so that when the bottle is deformed under pressure, the emulsion in the plastic spring 6 can be prevented from entering the main column 5 through the communication port 61. Therefore, the emulsion in the main column 5 can be prevented from flowing out after flowing to the press head 2, and the sealing property is good. The stop 71 has an inverted conical structure, its intermediate and lower parts can be pressed against the communication port 61 so that the sealing property and stability are better.When the pressing head 2 is pressed down, the communication port 61 moves downwards as the main column 5 and the plastic spring 6 contract and disengage from the stop 71, and the emulsion flows from the plastic spring 6 to the main column 5 through a space between them. Petition 870220055538, dated 06 / 24 / 2022, pp. 87 / 95 13 / 19 the traction rod 7 and the side wall of the communication door 61.

[0030] With the above construction, all parts of the emulsion pump can be made of plastic material, which is easy to meet high environmental requirements, easy to recycle, and does not require the use of a piston and lubricating fluid.

[0031] The locking cap 8 is fitted with sleeves outside the main column 5. A waterproof sleeve 9 is provided between the locking cap 8 and the main column 5 to block a gap between the upper end of the locking cap 8 and the main column 5. The waterproof sleeve 9 is made of plastic material. Since the locking cap 8 is fixed to the body and the main column 5 moves up and down relative to the locking cap 8, placing the waterproof sleeve 9 prevents external liquids and impurities from entering the body 1 from the gap between the locking cap 8 and the main column 5, and prevents contamination of the interior of the emulsion pump.

[0032] The plastic spring 6 is fitted into a snap-fit ​​connection with the main column 5, which can prevent the two from being separated up and down, thus facilitating the assembly and disassembly of the plastic spring 6 and the main column 5.

[0033] The upper end of the plastic spring 6 is provided with an annular fastening portion 62 inserted into the main column 5 from a lower port of the main column, an outer side surface of the fastening portion 62 is in a sealing connection with an inner side surface of the main column 5, and the communication port 61 is provided in the plastic spring 6 and is located inside the fastening portion 62. A second buckling ring 63 projects from an outer side of the fastening portion 62 and an inner wall of the main column 5 is provided with a second buckling groove 51 which is recessed and buckled with the second buckling ring 63. During assembly, the fastening portion 62 and the main column 5 are inserted into each other until the second buckling ring 63 is in a snap-fit ​​connection with the second buckling groove 51. Petition 870220055538, dated 06 / 24 / 2022, pp. 88 / 95 14 / 19

[0034] The upper end of the plastic spring 6 is provided with an annular end surface 64 which is positioned outside the fastening portion 62 and can be hermetically fitted onto the lower face of the main column 5. When the main column 5 is pressed down, the face of the lower end of the main column 5 presses against the annular end surface 64 and forms a seal between the two end faces. As the pressing head 2 is pressed, the internal pressure of the main column 5 increases. During downward pressing, the face of the lower end of the main column 5 presses against the annular end surface 64 and forms a seal between the two end faces, so that there is a better sealing property between the main column 5 and the plastic spring 6.Meanwhile, when the main column 5 is stationary or rising, since the internal pressure of the main column 5 is small, the liquid in the main column 5 is prevented from flowing out of the joint between the main column 5 and the plastic spring 6 by the sealing connection between the outer side surface of the fastening portion 62 and the inner side surface of the main column 5.

[0035] The internal holes of the lower ends of the fastening portion 62 and the main column 5 are circular. The second buckling ring 63 and the second buckling groove 51 are correspondingly annular and the main column 5 is rotatable relative to the plastic spring 6 under the action of an external force. A guide structure to guide an up and down movement of the main column 5 is disposed between the locking cap 8 and the main column 5 and, when the main column 5 rotates relative to the locking cap 8, the guide structure becomes misaligned and prevents the up and down movement of the main column 5.

[0036] The guide structure includes a guide groove 81 disposed in the locking cover 8, and the main column 5 is provided with a guide column 53 for guiding up and down in cooperation with the guide groove 81. One side of an upper end of the guide groove 81 is provided with Petition 870220055538, dated 06 / 24 / 2022, pp. 89 / 95 15 / 19 a locking groove 82 which is recessed and can be configured so that the guide column 53 rotates out of the guide groove 81 and then engages after the main column 5 rises, and the bottom of the locking groove 82 is located below the guide column 53 and limits the downward movement of the guide column 53.

[0037] When the plastic spring 6 is in an ascending state, the pressing head 2 and the main column 5 are rotated so that the main column 5 rotates relative to the locking cap 8. The guide column 53 rotates out of the guide groove 81 and engages with the locking groove 82 so that the main column 5 cannot move downwards. When the plastic spring 6 is in an ascending state, since the plastic spring 6 is constrained by the locking cap 8, and the pull rod 7 and the stop 71 pull the plastic spring 6 and the main column 5 downwards, the main column 5 is prevented from moving upwards so that the locking of the emulsion pump is achieved. Obviously, since the plastic spring 6 and the main column 5 are in quick-connect, the main column 5 can be forcibly pulled from the plastic spring 6 when the external force is large enough.

[0038] The first one-way valve device includes a first valve core 10, the main column 5 is provided internally with a main column outlet 52 in communication with the pressing head 2, the first valve core 10 includes a first outer ring 101 fixed between the pressing head 2 and the main column 5, an inner side of the first outer ring 101 is provided with a first inner core 102 isolated from the first outer ring 101 and covering the main column outlet 52 on a side close to the pressing head 2, and the first outer ring 101 and the first inner core 102 are elastically connected by means of a first rib 103, so that the first inner core 102 is able to float upwards when a lower part of the inner core is pressed so as to open the main column outlet 52, which has a simple structure. Petition 870220055538, dated 06 / 24 / 2022, pp. 90 / 95 16 / 19

[0039] The lower end of the press head 2 is provided with a first positioning groove 21 which is recessed and configured to position the first outer ring 101 after fitting; an annular protrusion 54 projecting towards the press head 2 and pressing the first inner core 102 towards the press head 2 is provided on the outer side of the main column outlet 52 on the main column 5; the annular protrusion 54 is located on the lower inner side of the first inner core 102 and the main column outlet 52 is sealed by pressing the first inner core 102 against the annular protrusion 54. The annular protrusion 54 projects upwards and presses the first inner core 102 towards the press head 2 so that there is an initial pre-pressure between the first inner core 102 and the annular protrusion 54.Therefore, the sealing performance of the first one-way valve device is better when the main column 5 is in a stationary state and during the ascent process.

[0040] The first outer ring 101, the first inner core 102 and the first rib 103 are integrally formed from an elastic-plastic material, preferably a rubber material, which has a simple structure.

[0041] The inner wall of the main column 5 is provided with a first recessed buckling groove 55; the press head 2 is provided with a first buckling ring 22 which is fitted into the first buckling groove 55 and limits the press head 2 upwards and downwards; the inner side of the main column 5 is provided with an anti-rotation groove 56 along the circumferential direction; the press head 2 is provided with an anti-rotation strip 23 which can be fitted into the anti-rotation groove 56 to prevent the press head 2 from rotating relative to the main column 5.

[0042] When the press head 2 and the main column 5 are assembled, the first valve core 10 is placed first in the first positioning groove 21 at the lower end of the head. Petition 870220055538, dated 06 / 24 / 2022, pp. 91 / 95 17 / 19 pressing 2. Next, the anti-rotation strip 23 is positioned opposite the anti-rotation groove 56, and the pressing head 2 is inserted into the upper end of the main column 5 until the first buckling ring 22 is in snap-fit ​​connection with the first buckling groove 55. At this point, the first outer ring 101 is pressed between the pressing head 2 and the main column 5, and the first inner core 102 is pressed into the annular protrusion 54. As shown in Fig. 2, the structure is simple and the assembly is convenient.

[0043] A sealing seat 70 is provided between the plastic spring 6 and the body 1 to connect the plastic spring 6 with the body 1 in a sealed manner; the sealing seat 70 is made of plastic material; a lower end of the traction rod 7 is fixed in the sealing seat 70, a lower part of the sealing seat 70 is provided with a lower cavity 701, the sealing seat 70 is provided with an orifice 702 that communicates the plastic spring 6 with the lower cavity 701, the lower cavity 701 is communicated with the inlet 11 of the body. By sealing the lower end of the plastic spring 6 with the sealing seat 70 and fixing the traction rod 7, the structure is simple.

[0044] The second one-way valve device includes a second valve core 20, the second valve core 20 is located in the lower cavity 701, the second valve core 20 includes a second outer ring 201 fixed between the sealing seat 70 and the body 1, an inner side of the second outer ring 201 is provided with a second inner core 202 isolated from the second outer ring 201 and covering the inlet 11 of the body on a side close to the lower cavity 701, and the second outer ring 201 and the second inner core 202 are elastically connected through a second rib 203 and so that the second inner core 202 is able to float upwards when a lower part of the second inner core 202 is pressed so as to open the inlet 11 of the body, which has a simple structure.

[0045] The second outer ring 201, the second inner core 202 and the Petition 870220055538, dated 06 / 24 / 2022, pp. 92 / 95 18 / 19 second rib 203 are entirely formed from an elastic-plastic material, preferably a rubber material, with a simple structure and convenient manufacturing.

[0046] The locking cap 8 is located above the plastic spring 6 and, when the plastic spring 6 rises, the locking cap 8 stops the plastic spring 6 from above and sets the maximum height of ascent of the plastic spring 6, the plastic spring 6 is in a compressed state when rising and pressing against the locking cap 8; a lower end of the plastic spring 6 presses against the sealing seat 70 in the lower part of the internal cavity of the body 1; the sealing seat 70 is provided with a sealing groove 703 into which the lower end of the plastic spring 6 inserts; a face of the lower end of the plastic spring 6 is pressed against a lower part of the sealing groove 703 and is sealed tightly fitted with the lower part of the sealing groove 703;Under elastic pressure from the plastic spring 6, a lower surface of the sealing seat 70 is firmly attached to the lower part of the internal cavity of the body 1 to form a seal with the lower part of the internal cavity of the body 1 on the lower surface of the sealing seat 70. Since the plastic spring 6 will be compressed by different amounts when in the rising state, in the pressed-down state, or in the process of rising and being pressed, the sealing seat 70 can always be pressed into the lower part of the internal cavity of the body 1, the sealing seat 70 and the body 1 are always connected in a sealed manner, and the face of the lower end of the plastic spring 6 is always pressed into the lower part of the sealing groove 703 in a sealed connection.

[0047] Once the plastic spring 6 is pressed between the locking cap 8 and the sealing seat 70 in the rising state, the frictional force to be overcome for the rotation of the plastic spring 6 and the sealing seat 70 is large. When the pressing head 2 and the main column 5 are rotated, the main column 5 can be rotated relative to the plastic spring 6, preventing Petition 870220055538, dated 06 / 24 / 2022, pp. 93 / 95 19 / 19 thus the rotation of the plastic spring 6 and the sealing seat 70.

[0048] Therefore, an independent sealing seat 70 and a plastic spring 6 are used. After the plastic spring 6 is inserted into the sealing groove 703 of the sealing seat 70, the traction rod 7 is inserted from the plastic spring 6, the traction rod 7 is inserted into the sealing seat 70 and the plastic spring 6 is constrained between the sealing seat 70 and the stop 71 to form a whole that is inserted into the body 1, wherein the side wall of the sealing seat 70 cooperates with the side wall of the internal cavity of the body 1. The structure is simple and the assembly is convenient.

[0049] In addition, the lower part of the sealing seat 70 is provided with a second positioning groove 704 for positioning the second outer ring 201 after fitting. When the sealing seat 70 is loaded into the body 1, the second valve core 20 is placed in the second positioning groove 704, and the second valve core 20 can be fixed above the inlet 11 of the body 1 by being pressed by the elastic force of the plastic spring 6.

[0050] The plastic spring 6 is in a compressed state after rising. On the one hand, this can stabilize the position of the pressing head 2 and the main column 5 after rising; on the other hand, after the plastic spring 6 rises, it can cause the traction rod 7 and the stop 71 to pull firmly on the communication port 61 to ensure sealing. Furthermore, when the bottle is deformed under pressure and the pressure of the internal cavity of the plastic spring 6 increases, the upward pressure of the plastic spring 6 is shared so as to prevent the traction force of the traction rod 7 and the stop 71 from being too great on the communication port 61. Petition 870220055538, dated 06 / 24 / 2022, pp. 94 / 95

Claims

1 / 5 CLAIMS 1. An all-plastic emulsion pump comprising a body (1) and a pressing head (2), wherein an upper end of the body (1) is provided with threads (3), a lower end of the body (1) is provided with a suction tube (4) communicating with an inlet (11) of the lower end of the body (1), the pressing head (2) is connected to a main column (5) inserted into the body (1), a plastic spring (6) capable of lifting the pressing head (2) and the main column (5) is provided in an internal cavity of the body (1), the plastic spring (6) is located below the main column (5), the plastic spring (6) is in a sealed connection with the main column (5), the plastic spring (6) is a plastic spring tube with open upper and lower ends and sealed sides, an upper end of the plastic spring (6) is communicating with the main column (5),and the lower end of the plastic spring (6) is in communication with the inlet (11) of the body so that the plastic spring (6) forms a channel to connect the main column (5) with the inlet (11) of the body and for the liquid to flow; a communication port (61) is provided between the plastic spring (6) and the main column (5) to communicate the plastic spring (6) with the main column (5) up and down, the body (1) is provided internally with a traction rod (7) located inside the plastic spring (6), the traction rod (7) corresponds up and down with the communication port (61) and is able to penetrate outside the communication port (61) when the plastic spring (6) is pressed down, and there is a gap between the traction rod (7) and the side wall of the communication port (61); an upper end of the traction rod (7) is provided with a stop (71) located above the communication port (61),and the stop (71) is capable of pressing the communication port (61) from above when the plastic spring (6) is lifted to pull down the plastic spring (6) and the main column (5), and seal the communication port (61); an upper opening of the body (1) is provided with a locking cap (8) which is capable of limiting the plastic spring (6) in the body (1); a first one-way valve device is provided between the pressing head (2) and the main column (5), which allows the emulsion in the main column (5) to flow to the pressing head (2) and prevents the emulsion in the pressing head (2) from flowing to the main column (5); a second one-way valve device is provided between the plastic spring (6) and the inlet (11) of the body,which allows the emulsion to flow into the plastic spring (6) from the inlet (11) of the body and prevents the emulsion in the plastic spring (6) from flowing out of the inlet (11) of the body; the body (1), the threads (3), the pressing head (2), the main column (5), the suction tube (4), the plastic spring (6), the pull rod (7), the stop (71), the locking cap (8), the first one-way valve device and the second one-way valve device are respectively made of plastic material; the upper end of the plastic spring (6) is provided with an annular fixing portion (62) inserted into the main column (5) from a lower port of the main column, an outer side surface of the fixing portion (62) is in a sealing connection with an inner side surface of the main column (5), and the communication port (61) is provided in the plastic spring (6) and is located inside the fixing portion (62),A second buckling ring (63) projects from an outer side of the fastening portion (62) and an inner wall of the main column (5) is provided with a second buckling groove (51) which is recessed and buckled with the second buckling ring (63); CHARACTERIZED by, internal holes of the lower ends of the fastening portion (62) and of the main column (5) are circular, the second buckling ring (63) and the second buckling groove (51) are correspondingly annular and the main column (5) is rotatable relative to the plastic spring (6) under the action of an external force, a guide structure to guide an up and down movement of the main column (5) is disposed between the locking cap (8) and the main column (5) and, when the main column (5) rotates relative to the locking cap Petition 870260045918, dated 05 / 14 / 2026, page. 8 / 18 3 / 5 (8), the guide structure becomes misaligned and prevents the up and down movement of the main column (5)., 2. Emulsion pump made entirely of plastic, according to claim 1, CHARACTERIZED in that the locking cap (8) is coated with a sleeve outside the main column (5), a waterproof sleeve (9) to block a gap between an upper end of the locking cap (8) and the main column (5) is provided between the locking cap (8) and the main column (5).

3. Emulsion pump made entirely of plastic, according to claim 1, CHARACTERIZED in that the plastic spring (6) and the main column (5) are in a snap-fit ​​connection, which is able to prevent the plastic spring (6) and the main column (5) from separating up and down.

4. Emulsion pump made entirely of plastic, according to claim 1, CHARACTERIZED in that the upper end of the plastic spring (6) is provided with an annular end surface (64) which is positioned outside the fixing portion (62) and is able to fit hermetically to a lower face of the main column (5), when the main column (5) is pressed down, the face of the lower end of the main column (5) presses against the annular end surface (64) and forms a seal between the two end faces.

5. Emulsion pump made entirely of plastic, according to claim 1, CHARACTERIZED in that the first one-way valve device comprises a first valve core (10), the main column (5) being provided internally with a main column outlet (52) communicating with the pressing head (2), the first valve core (10) comprising a first outer ring (101) fixed between the pressing head (2) and the main column (5), an inner side of the first outer ring (101) being provided with a first inner core (102) isolated from the first outer ring (101) and covering the main column outlet (52) on a side close to the pressing head (2), and the first outer ring (101) and the first core Petition 870260045918, dated 05 / 14 / 2026, page.9 / 18 4 / 5 inner (102) being elastically connected by means of a first rib (103), so that the first inner core (102) is able to float upwards when a lower part of the inner core (102) is pressed so as to open the outlet of the main column (52).

6. Emulsion pump made entirely of plastic, according to any one of claims 1 to 5, CHARACTERIZED in that a sealing seat (70) is provided between the plastic spring (6) and the body (1) to connect the plastic spring (6) with the body (1) in a sealed manner; a lower end of the pull rod (7) is fixed in the sealing seat (70), a lower part of the sealing seat (70) is provided with a lower cavity (701); the sealing seat is provided with an orifice (702) that communicates the plastic spring (6) with the lower cavity (701), the lower cavity (701) being communicated with the inlet (11) of the body.

7. Emulsion pump made entirely of plastic, according to claim 6, CHARACTERIZED in that the second one-way valve device comprises a second valve core (20), the second valve core (20) being located in the lower cavity (701), the second valve core (20) comprising a second outer ring (201) fixed between the sealing seat (70) and the body (1), an inner side of the second outer ring (201) being provided with a second inner core (202) isolated from the second outer ring (201) and covering the inlet (11) of the body on a side close to the lower cavity (701), and the second outer ring (201) and the second inner core (202) being elastically connected through a second rib (203) so that the second inner core (202) is able to float upwards when a lower part of the second inner core (202) is pressed so as to open the inlet (11) of the body.

8. Emulsion pump made entirely of plastic, according to claim 6, CHARACTERIZED in that the locking cap (8) is located above the plastic spring (6) and, when the plastic spring (6) rises, the locking cap (8) stops the plastic spring (6) from above and sets a Petition 870260045918, dated 05 / 14 / 2026, page.10 / 18 5 / 5 maximum height of the plastic spring (6) rising, the plastic spring (6) being in a compressed state when rising and pressing against the locking cap (8); a lower end of the plastic spring (6) pressing the sealing seat (70) against a lower part of the internal cavity of the body (1); the sealing seat (70) being provided with a sealing groove (703) into which the lower end of the plastic spring (6) is inserted; a face of the lower end of the plastic spring (6) being pressed against a lower part of the sealing groove (703) and being sealably fitted with the lower part of the sealing groove (703); under an elastic pressure of the plastic spring (6), a lower surface of the sealing seat (70) being firmly attached to the lower part of the internal cavity of the body (1) to form a seal with the lower part of the internal cavity of the body (1) on the lower surface of the sealing seat (70). Petition 870260045918, dated 05 / 14 / 2026, page 11 / 18.

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