A liquid injection pump

Abstract

A liquid spray pump includes a pump body, a large cover connected to a container, a nozzle, a liquid discharge one-way valve, a main piston rod and a wrench for driving the main piston rod to move up and down, the nozzle and the liquid discharge one-way valve are arranged in the outlet of the pump body, so that the liquid discharge channel in the pump body is connected to the nozzle through the liquid discharge one-way valve, and a main piston boosting chamber with a variable volume is formed between the main piston rod and the main body cavity, characterized in that: the main piston boosting chamber is connected to the liquid discharge one-way valve on the pump body through the boosting valve and the channel structure; and the main piston boosting chamber is also connected to the continuous pressure pipe hidden in the container through the boosting valve and the channel structure, a continuous pressure piston and a continuous pressure spring that keeps the volume of the continuous pressure chamber decreasing are installed in the continuous pressure pipe, and the continuous pressure chamber is connected to the liquid discharge one-way valve through the channel structure. The structural design of the present invention is reasonable, which effectively increases the space for liquid storage, so that the spray volume is large and the continuous spray time is long. At the same time, the bottle structure has a large selectivity and the appearance design is more flexible and diverse.

Description

Technical Field

[0001] The invention relates to a spray device, in particular to a liquid spray pump. Background Art

[0002] Most of the existing hydraulic spray pumps include a pump body, a wrench and a nozzle, and a liquid storage chamber is provided in the nozzle and the pump body. However, the volume of such a liquid storage chamber is very small and cannot store a large amount of liquid, so that the spraying time is also short and long-term spraying cannot be achieved; at the same time, the appearance and structural design are relatively simple and cannot achieve diversity.

[0003] Upon investigation, the existing Chinese patent number CN201710323441.9, "A Hydraulic Pump", includes: a liquid container having an opening; a spray mechanism, sealingly coupled to the liquid container adjacent to the opening so as to smoothly communicate with the interior of the liquid container, the spray mechanism including: (i) a main body, defining a first channel with a first channel wall and a second channel with a second channel wall, the first and second channels being connected to each other through a first passage; (ii) a liquid-filling piston, cooperating with the first channel wall to define a liquid collecting chamber, the liquid-filling piston defining a third channel, liquid being introduced into the liquid collecting chamber through the third channel; (iii) an inlet check valve, allowing liquid to be discharged from the inlet check valve. The liquid container flows to the liquid collecting chamber; (iv) a dispensing piston and a discharge valve seat, which cooperate with the second channel wall to define the dispensing chamber, and the dispensing piston responds to the fluid pressure in the dispensing chamber to overcome the second restoring force; (v) an outlet check valve, allowing liquid to flow from the liquid collecting chamber to the dispensing chamber through the first passage; (vi) an actuator, which is used to selectively move the liquid filling piston in the opposite direction to the first restoring force relative to the first channel wall to reduce the volume of the liquid collecting chamber; and (vii) a one-way discharge valve, which is used to allow liquid to flow from the dispensing chamber through the second passage of the discharge valve seat, wherein when the fluid pressure in the dispensing chamber exceeds the first pressure threshold, the discharge valve opens. The liquid spray pump is self-sealed after each use, but like the existing structure, it also adopts a liquid storage chamber designed in the nozzle, which will affect the nozzle shape design. Due to the nozzle volume limitation, there are also problems of small liquid storage volume, small spray volume and short spray time. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a liquid spray pump with a reasonable structural design, a larger spray volume, a long continuous spray time and convenient nozzle shape design in view of the above technical status quo.

[0005] The technical solution adopted by the present invention to solve the above-mentioned technical problems is: a liquid spray pump, including a pump body, a large cover connected to a container, a nozzle, a liquid outlet one-way valve, a main piston rod and a wrench for driving the main piston rod to move up and down, the nozzle and the liquid outlet one-way valve are arranged in the outlet of the pump body, so that the liquid outlet flow channel in the pump body is connected with the nozzle through the liquid outlet one-way valve, and a main piston boosting chamber with variable volume is formed between the main piston rod and the cavity of the pump body, characterized in that: the main piston boosting chamber is connected with the liquid outlet one-way valve on the pump body through the boosting valve and the flow channel structure; and the main piston boosting chamber is also connected with the continuous pressure chamber in the continuous pressure tube hidden in the container through the boosting valve and the flow channel structure, the continuous pressure tube is equipped with a continuous pressure piston and a continuous pressure spring that keeps the volume of the continuous pressure chamber decreasing, and the continuous pressure chamber is connected with the liquid outlet one-way valve through the flow channel structure.

[0006] Preferably, the flow channel structure is arranged on the pump body and the large cover, including mutually connected transverse flow channels and longitudinal flow channels, the longitudinal flow channels of the upper part are distributed on the pump body, and the longitudinal flow channels of the lower part are distributed in the large cover, and the longitudinal flow channels of the upper part and the longitudinal flow channels of the lower part are sealed and connected to each other.

[0007] One of the flow channel structures, the transverse flow channel is distributed in the pump body, with the outlet of the main piston boosting chamber as the boundary, the front section of the transverse flow channel is the liquid outlet flow channel, which is used to connect the outlet of the main piston boosting chamber and the liquid outlet one-way valve, and the transverse flow channel and the longitudinal flow channel in the middle and rear sections are connected to form a continuous pressure flow channel, which is used to connect the outlet of the main piston boosting chamber and the continuous pressure chamber.

[0008] As a further improvement, a filling rod is installed in the transverse flow channel and / or the longitudinal flow channel.

[0009] The second flow channel structure is that the transverse flow channel is distributed in the pump body and is divided into an isolated front section transverse flow channel and a rear section transverse flow channel. The front section transverse flow channel is a liquid outlet flow channel, which is used to connect the outlet of the main piston boosting chamber and the liquid outlet one-way valve. The rear section transverse flow channel and the longitudinal flow channel are connected to form a continuous pressure flow channel, which is used to connect the outlet of the main piston boosting chamber and the continuous pressure chamber. In addition, there is another connecting flow channel arranged in the pump body, which is combined with the longitudinal flow channel to connect the continuous pressure chamber and the liquid outlet one-way valve.

[0010] As a further improvement, a filling rod is arranged in the flow channel of the flow channel. The filling rod has a non-circular cross-section and is fixed in the pump body by size matching. An isolated front section transverse flow channel and a rear section transverse flow channel are opened on the bottom surface of the filling rod. The front section transverse flow channel serves as a liquid outlet flow channel to connect the outlet of the main piston boosting chamber and the liquid outlet one-way valve, while the rear section transverse flow channel serves as a part of the continuous pressure flow channel and is combined with the longitudinal part of the continuous pressure flow channel to connect the outlet of the main piston boosting chamber to the continuous pressure chamber. In addition, another transverse flow channel is opened on the top surface of the filling rod, which is combined with the longitudinal hole at the tail end of the filling rod or the size is reduced to form another connecting flow channel connecting the continuous pressure chamber and the liquid outlet one-way valve.

[0011] The third flow channel structure is that the transverse flow channel is distributed in the pump body and is used to connect the outlet of the main piston boosting chamber and the continuous pressure chamber. Another connecting flow channel is arranged in the pump body, combined with the longitudinal flow channel to connect the continuous pressure chamber and the liquid outlet one-way valve.

[0012] Further improvement, the flow channel structure is provided with a filling rod in the flow channel, the filling rod adopts a filling rod with a non-circular cross-section, and is fixed in the pump body by size matching, and a transverse flow channel is opened on the bottom surface of the filling rod, which serves as a partial liquid outlet flow channel. At the same time, as a partial continuous pressure flow channel, another transverse flow channel is opened on the top surface of the filling rod, which is combined with the longitudinal hole at the tail end of the filling rod or the size is reduced to form another connecting flow channel connecting the continuous pressure chamber and the liquid outlet one-way valve. At the same time, the other connecting flow channel is connected to the transverse flow channel opened on the bottom surface of the filling rod to form a complete liquid outlet flow channel.

[0013] As a further improvement, the pressure-continuing tube is a hollow tube with upper and lower openings, and an open bottom plug is provided at the lower opening position of the pressure-continuing tube. The pressure-continuing tube is fixed to the lower end of the large cover by threaded connection or clamping, and a gasket is lined between the upper edge of the pressure-continuing tube and the lower end surface of the large cover.

[0014] As a further improvement, a spring column is protruding on the inner side surface of the bottom plug, the lower end of the continuous pressure spring is sleeved on the spring column, the upper end of the continuous pressure spring is supported against the lower end of the continuous pressure piston, and an annular groove is provided on the middle outer wall surface of the continuous pressure piston, and a sealing ring is embedded in the annular groove to resist against the inner wall of the continuous pressure tube for increasing the sealing performance.

[0015] As a further improvement, a boosting valve is provided at the upper end of the main piston boosting chamber of the pump body, the boosting valve includes a boosting valve seat, the boosting valve seat is longitudinally provided with a through hole, the outer wall of the boosting valve seat is sealed and fixed to the inner wall of the main piston boosting chamber of the pump body, the upper end of the boosting valve seat is a reduced diameter section, and a liquid outlet hole is horizontally opened at the upper part of the reduced diameter section, the boosting valve core is a silicone sleeve structure, the boosting valve core is sleeved outside the reduced diameter section of the boosting valve seat, the thickness of the upper part of the boosting valve core corresponding to the liquid outlet hole is thinned, the main piston rod is coaxially arranged below the boosting valve, the main piston rod is a hollow rod with a wide upper end and a narrow lower end, the upper end of the main piston rod presents a hollow main piston, the outer wall of the main piston is sealed against the inner wall of the main piston boosting chamber of the pump body, a main valve is provided at the opening position at the bottom of the main piston inner cavity at the upper end of the main piston rod, the lower end of the main piston rod is connected to the suction pipe through the large cover, and a main working spring is supported between the upper end of the main piston rod and the boosting valve seat.

[0016] As a further improvement, the lower end of the large cover has an internal thread structure connected to the container, the middle part of the upper end surface of the large cover is convexly provided with an outer ring that cooperates with the lower end opening of the pump body and an inner ring for the lower end of the main piston rod to pass through, the wrench is installed on the front side of the pump body and below the nozzle, the lower end of the wrench is provided with a wrench switch, the upper and middle part of the wrench is connected to the pump body through a pivot structure, and the inner push foot of the wrench passes through the wall guide hole of the pump body, abuts against the lower bottom surface of the main piston at the upper end of the piston rod, thereby realizing connection with the main piston rod, and the main piston rod can be moved up and down by pulling the wrench.

[0017] Further improvement, the front side of the upper end of the pump body is provided with a mounting seat for installing a liquid outlet one-way valve, the liquid outlet one-way valve includes a small liquid outlet valve seat and a small liquid outlet valve seat cover, the small liquid outlet valve seat cover is fixedly arranged in the mounting seat, the small liquid outlet valve seat cover is fixedly connected with the small liquid outlet valve seat buckle, the small liquid outlet valve seat is provided with a small liquid outlet valve and a small liquid outlet valve spring, the nozzle is installed at the front end of the mounting seat, and the aperture of the nozzle is 0.38~0.4mm.

[0018] Finally, the pump body is provided with an outer shell and an upper cover. The outer shell covers the outside of the pump body. The lower end of the outer shell is against the container. The front side of the outer shell is provided with an escape hole corresponding to the position of the wrench. The upper cover is arranged above the pump body and is ultrasonically welded to the upper end of the outer shell. Openings for the nozzle to extend are provided on the front sides of the upper cover and the outer shell.

[0019] Compared with the prior art, the advantages of the present invention are: the liquid storage chamber traditionally set at the nozzle position is cancelled, a continuous pressure pipe is added below the pump body, connected to the large cover, and can be hidden in the container, a continuous pressure piston and a continuous pressure spring that keeps the volume of the continuous pressure chamber decreasing are installed in the continuous pressure pipe, so as to maintain the pressure of the liquid outlet check valve for a period of time, when the wrench is pressed, the main piston rod in the pump body moves upward, the volume of the main piston boosting chamber is reduced, the pressure is increased, the boosting valve is opened, and the liquid in the main piston boosting chamber enters the continuous pressure chamber through the continuous pressure flow channel, when the pressure in the continuous pressure chamber reaches a certain value, the liquid outlet check valve is opened and maintained for a period of time, and the liquid in the continuous pressure chamber can be continuously sprayed from the nozzle through the liquid outlet check valve. Filling rods are respectively installed in the transverse flow channel and the longitudinal flow channel, so as to greatly reduce the cross-sectional area of ​​the liquid passing through the flow channel, thereby accelerating the liquid outlet time when used for the first time and avoiding excessive liquid residue in the transverse flow channel and the longitudinal flow channel; the combination of the filling rod facilitates the flow channel structure arrangement and manufacturing, and reduces the production difficulty. The invention has a reasonable structural design, effectively increases the liquid storage space, makes the spray volume large, and the continuous spray time long. At the same time, the bottle structure has a large selectivity, and the appearance design of the spray head can be more flexible and diverse. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural cross-sectional view of Embodiment 1 of the present invention;

[0021] Figure 2 This is an exploded view of Example 1 of the present invention;

[0022] Figure 3 (a) to 3(e) are working principle diagrams of Example 1 of the present invention;

[0023] Among them, (a) is the initial state; (b) when the wrench is pulled, the main piston rod moves upward, the main valve is closed, the boost valve is opened, and the liquid in the boost chamber of the main piston enters the continuous pressure chamber of the continuous pressure tube through the continuous pressure channel; (c) after the liquid in the boost chamber of the main piston is delivered, the boost valve is closed instantly, and the continuous pressure piston in the continuous pressure tube compresses the liquid to move upward under the action of the continuous pressure spring, the pressure in the continuous pressure chamber increases and maintains the liquid outlet check valve open; (d) when the pressure in the continuous pressure chamber drops, the liquid outlet check valve is closed instantly; (e) when the wrench is released, the main piston rod moves downward, the main valve opens, and the liquid in the container is sucked into the pump body.

[0024] Figure 4 It is a structural cross-sectional view of Embodiment 2 of the present invention;

[0025] Figure 5 It is a structural cross-sectional view of Embodiment 3 of the present invention; DETAILED DESCRIPTION

[0026] The present invention is further described in detail below with reference to the accompanying drawings.

[0027] Example 1

[0028] like Figure 1 , 2As shown in Figures 3(a) to 3(e), a liquid spray pump comprises a pump body 1, a large cover 2 connected to a container, a nozzle 3, a liquid discharge one-way valve 4, a main piston rod 5 and a wrench 6 for driving the main piston rod 5 to move up and down, the nozzle 3 and the liquid discharge one-way valve 4 are arranged in the outlet of the pump body 1, so that the liquid discharge flow channel C in the pump body 1 is connected to the nozzle 3 through the liquid discharge one-way valve 4, and a main piston boosting chamber A with a variable volume is formed between the main piston rod 5 and the cavity of the pump body 1, and its flow channel structure is that the main piston boosting chamber A is connected to the liquid discharge one-way valve 4 on the pump body 1 through the boosting valve 70 and the liquid discharge flow channel C, and the main piston boosting chamber A is also connected to the continuous pressure chamber B in the continuous pressure pipe 8 hidden in the container through the boosting valve 70 and the continuous pressure flow channel D, and the continuous pressure pipe 8 is connected to the continuous pressure chamber B in the continuous pressure pipe 8 hidden in the container. A continuous pressure piston 80 and a continuous pressure spring 81 are installed to keep the volume in the continuous pressure chamber B in a decreasing trend. The continuous pressure chamber B is indirectly connected to the liquid outlet one-way valve 4 through the liquid outlet channel C and the continuous pressure channel D. In this way, when the wrench 6 is pressed, the main piston rod 5 moves upward, the main piston boosting valve 70 opens, and a part of the liquid in the main piston boosting chamber A flows through the liquid outlet channel C to the liquid outlet one-way valve 4, while the other part of the liquid in the main piston boosting chamber A flows through the continuous pressure channel D into the continuous pressure chamber B of the continuous pressure pipe 8. When the pressure in the continuous pressure chamber B reaches a certain value, the liquid outlet one-way valve 4 can start to open and remain in a continuously open state, so that the liquid in the continuous pressure chamber B can be continuously sprayed out from the nozzle 3 through the continuous pressure channel D and the liquid outlet channel C, the liquid outlet one-way valve 4.

[0029] In this embodiment, the first flow channel structure is adopted, and the continuous pressure chamber B is indirectly connected to the liquid outlet check valve 4, and its structure is that the continuous pressure chamber B is connected to the liquid outlet check valve 4 through the continuous pressure flow channel D and the liquid outlet flow channel C. The continuous pressure flow channel D is arranged on the pump body 1 and the large cover 2, and the pump body 1 and the large cover 2 are assembled and connected together, and can usually be assembled together by snap-fit ​​connection, that is, the pump body 1 and the large cover 2 are respectively arranged with a bayonet and a card foot at the connection to connect them together. The continuous pressure flow channel D includes a part of the lateral flow channel and the longitudinal flow channel that are interconnected, the longitudinal flow channel of the upper part is distributed on the pump body 1, and the longitudinal flow channel of the lower part is distributed in the large cover 2, and the longitudinal flow channel of the upper part and the longitudinal flow channel of the lower part are sealed and connected to each other. The lateral flow channel is distributed in the pump body 1, with the outlet 72 of the main piston boosting chamber A as the boundary, the lateral flow channel of the front section is the liquid outlet flow channel C, and the lateral flow channel and the longitudinal flow channel of the middle and rear sections are connected to form a complete continuous pressure flow channel D. In particular, filling rods 10 are respectively installed in the transverse flow channel and the longitudinal flow channel, thereby greatly reducing the cross-sectional area of ​​the liquid passing through the flow channel, thereby speeding up the liquid discharge time when used for the first time and avoiding excessive liquid residue in the transverse flow channel and the longitudinal flow channel. The continuous pressure pipe 8 is a hollow pipe with upper and lower openings. An open bottom plug 82 is provided at the lower opening position of the continuous pressure pipe 8. The lower end surface of the large cover 2 is convexly provided with an internal threaded connection section for the continuous pressure pipe 8 to be installed. The upper end of the continuous pressure pipe 8 is formed with a reduced diameter external thread section 8a that matches the internal threaded connection section. The continuous pressure pipe 8 is fixed to the lower end of the large cover 2 by threaded connection. A gasket 15 is lined between the upper edge of the continuous pressure pipe 8 and the lower end surface of the large cover 2 to strengthen the seal. Of course, the continuous pressure pipe 8 can also be connected to the lower end of the large cover 2 by snap connection. A spring column 821 is convexly arranged on the inner side of the bottom plug 82, and the lower end of the continuous pressure spring 81 is sleeved on the spring column 821. The upper end of the continuous pressure spring 81 is supported against the lower end of the continuous pressure piston 80, so that the continuous pressure piston 80 has a tendency to always move upward, so that the volume of the continuous pressure chamber B keeps decreasing. Two annular grooves are provided on the outer wall surface of the middle part of the continuous pressure piston 81, and an O-ring 14 is embedded in the annular groove as a sealing member to resist the inner wall of the continuous pressure pipe 8 to increase the sealing performance.

[0030] The cavity of the pump body 1 is the main piston boosting chamber A, and a boosting valve is provided at the upper end thereof. The boosting valve includes a boosting valve seat 7. The boosting valve seat 7 is longitudinally provided with a through hole. The outer wall of the boosting valve seat 7 is sealed and fixed to the inner wall of the cavity of the pump body 1. The upper end of the boosting valve seat 7 is a reduced diameter section, and a liquid outlet hole 71 is horizontally opened at the upper part of the reduced diameter section. The boosting valve core 70 is a silicone sleeve structure. The boosting valve core 70 is sleeved outside the reduced diameter section of the boosting valve seat 7, and the thickness of the upper part of the boosting valve core 70 corresponding to the liquid outlet hole 71 is thinned. In this way, when the pressure in the main piston boosting chamber A increases, the upper part of the boosting valve core 70 corresponding to the liquid outlet hole 71 can be squeezed open, that is, the boosting valve is opened. The main piston rod 5 is coaxially arranged below the booster valve. The main piston rod 5 is a hollow rod with a wide upper end and a narrow lower end. The upper end of the main piston rod 5 is a hollow main piston 52. The outer wall of the main piston 52 is sealed against the inner wall of the main piston booster chamber A of the pump body 1. An elastic valve seat is arranged around the opening position on the bottom surface of the inner cavity of the main piston 52 at the upper end of the main piston rod 5. The elastic valve seat is a sleeve seat structure. The side wall of the sleeve seat is grooved to increase its elasticity. In addition, the inner wall surface of the sleeve seat is provided with a flange to limit the valve core from sliding out. A ball is installed in the elastic valve seat as the main valve core 50, thereby forming a main valve. This is a conventional one-way ball valve structure. The lower end of the main piston rod 5 passes through the large cover 2 and is connected to the suction pipe 9. A main working spring 51 is supported between the upper end of the main piston rod 5 and the booster valve seat 7, so that the main piston rod 5 has a tendency to always move downward.

[0031] The lower end of the large cover 2 has an internal thread structure connected to a container such as various bottles. The middle part of the upper end surface of the large cover 2 is provided with an outer ring 21 that is plugged into the lower end opening of the pump body 1 and an inner ring 22 for the lower end of the main piston rod 5 to pass through, and a sealing ring is combined to achieve a sealed connection. The wrench 6 is installed on the front side of the pump body 1 and below the nozzle 3. The lower end of the wrench 6 is provided with a wrench switch 60. The middle and upper part of the wrench 6 is connected to the pump body 1 through a pivot structure, and the inner push foot 61 of the wrench 6 passes through the wall guide hole of the pump body 1 and contacts the lower bottom surface of the main piston 52 at the upper end of the piston rod 5 to achieve connection with the main piston rod 5. By pulling the wrench 6, the main piston rod 5 can be moved up and down. The upper front side of the pump body 1 is provided with a mounting seat 1a for installing a liquid discharge check valve 4. The liquid discharge check valve 4 includes a small liquid discharge valve seat 41 and a small liquid discharge valve seat cover 42. The small liquid discharge valve seat cover 42 is fixedly arranged in the mounting seat 1a. The small liquid discharge valve seat cover 42 is fixedly connected with the small liquid discharge valve seat 41 by snapping. A small liquid discharge valve 43 and a small liquid discharge valve spring 44 are arranged in the small liquid discharge valve seat 41. The nozzle 3 is installed at the front end of the mounting seat 1a. The aperture of the nozzle 3 is 0.38-0.4mm. The pump body 1 is provided with a shell 11 and an upper cover 12. The shell 11 covers the outside of the pump body 1. The lower end of the shell 11 abuts against the container. The front side of the shell 11 is provided with a avoidance corresponding to the position of the wrench 6. The upper cover 12 is provided above the pump body 1 and is ultrasonically welded to the upper end of the shell 11. An opening for the nozzle 3 to extend is provided on the front side of the upper cover 12 and the shell 11.

[0032] The specific working principle is as follows:

[0033] Push the wrench 6 downwards, as shown in Figure 3 As shown in (b), the main piston rod 5 moves upward under the action of the wrench to overcome the elastic force of the main working spring 51, and the main piston 52 also moves upward. The main valve is closed instantly. At the same time, due to the increase in pressure in the main piston boosting chamber A, the boosting valve opens, and part of the liquid in the main piston boosting chamber A flows through the liquid outlet channel C to the liquid outlet check valve 4, and the other part of the liquid in the main piston boosting chamber A flows through the continuous pressure channel D into the continuous pressure chamber B of the continuous pressure pipe 8. The boosting valve is a one-way valve, so the outflowing liquid will not flow back to the main piston boosting chamber A; Figure 3 As shown in (c), the continuous pressure piston 80 in the continuous pressure pipe 8 gradually moves downward under the action of the continuous pressure spring 81 and the liquid pressure, and the continuous pressure spring 81 is compressed. After completing the liquid delivery from the main piston boosting chamber to the continuous pressure chamber, the boosting valve is closed, and the continuous pressure piston 80 stops moving downward. After multiple wrench movements, under the action of the elastic force of the continuous pressure spring 81, the pressure in the continuous pressure chamber B gradually increases. When the pressure increases to a certain value, it is transmitted to the liquid outlet check valve 4 through the liquid, so that the liquid outlet check valve 4 opens, and the liquid is sprayed out through the nozzle 3. Since there is more liquid in the continuous pressure chamber in the continuous pressure pipe 8 and a certain pressure is maintained under the action of the continuous pressure spring 81, the liquid outlet check valve 4 can be continuously opened for a period of time to spray liquid; as shown in FIG. Figure 3 As shown in (d), after the liquid in the continuous pressure chamber B is continuously ejected, the pressure drops until the pressure is insufficient to open the liquid outlet check valve 4, and the liquid outlet check valve 4 is closed instantly; Figure 3 As shown in (e), loosen the wrench 6, the main piston rod 5 moves downward under the action of the main working spring 51, the volume of the main piston boosting chamber A increases, the pressure decreases, the main valve core 50 can be opened, and the liquid in the container is sucked into the main piston boosting chamber A of the pump body 1 through the suction tube 9, ready for the next time.

[0034] Since the aperture of the nozzle 3 of the present embodiment is 0.38-0.4mm, each time the main piston rod 5 moves up and down, the liquid in the main piston boosting chamber A is sent to the continued pressure chamber B. The nozzle 3 needs more than three times the time to spray out the liquid sent by the main piston rod 5 once. Therefore, when the main piston rod 5 works continuously, a large amount of liquid will accumulate in the continued pressure chamber B and cannot be quickly discharged from the nozzle 3. The large amount of accumulated liquid will generate pressure and pressure, and continue to push open the liquid outlet one-way valve 4. When the main piston rod 5 stops working, the continued pressure spring 81 will continue to push the continued pressure piston 80 upward to work, so that the liquid in the continued pressure chamber B is continuously sprayed out from the nozzle 3.

[0035] Example 2

[0036] The continuous pressure chamber B is directly connected to the liquid outlet check valve 4, and its flow channel structure is different, using the second flow channel structure, and the rest is similar to the embodiment 1. Figure 4 The diagram shows that a non-circular filling rod 10 is used, which can usually be a rectangular cross-section and is fixed in the pump body 1 by size matching. An isolated front section transverse flow channel and a rear section transverse flow channel are opened on the bottom surface of the filling rod 10, wherein the front section transverse flow channel serves as a liquid outlet flow channel C to connect the outlet 72 of the main piston boosting chamber A and the liquid outlet one-way valve 4, and the rear section transverse flow channel serves as a part of the continuous pressure flow channel D, combined with the longitudinal part of the continuous pressure flow channel D, so that the outlet 72 of the main piston boosting chamber A is connected to the continuous pressure chamber B. In addition, another transverse flow channel E is opened on the top surface of the filling rod 10, which is combined with the longitudinal hole 100 at the tail end of the filling rod 10 or has a reduced size to form another connecting flow channel, which can directly connect the continuous pressure chamber B and the liquid outlet one-way valve 4.

[0037] Example 3

[0038] The continuous pressure chamber B is directly connected to the liquid outlet check valve 4, and its flow channel structure is different, adopting the third flow channel structure, and the rest is similar to the embodiment 1. Figure 5 The diagram shows that a non-circular filling rod 10 is used, which may be a rectangular cross-section, and is fixed in the pump body 1 by size matching. A transverse flow channel is opened on the bottom surface of the filling rod 10, which serves as a part of the liquid outlet flow channel C. At the same time, as a part of the continuous pressure flow channel D, another transverse flow channel E is opened on the top surface of the filling rod 10, which is combined with the longitudinal hole 100 at the tail end of the filling rod or reduced in size to form another connecting flow channel that can directly connect the continuous pressure chamber B and the liquid outlet check valve 4. At the same time, the other connecting flow channel is connected to the transverse flow channel opened on the bottom surface of the filling rod 10 to form a complete liquid outlet flow channel C, which connects the outlet 72 of the main piston boosting chamber A and the liquid outlet check valve 4.

[0039] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A liquid spray pump, comprising a pump body, a large cover connected to a container, a nozzle, a liquid discharge check valve, a main piston rod and a wrench for driving the main piston rod to move up and down, the nozzle and the liquid discharge check valve are arranged in the outlet of the pump body, so that the liquid discharge flow channel in the pump body is connected to the nozzle through the liquid discharge check valve, and a main piston booster chamber with a variable volume is formed between the main piston rod and the cavity of the pump body, characterized in that: The main piston boosting chamber is connected to the liquid outlet one-way valve on the pump body through the boosting valve and the flow channel structure; and the main piston boosting chamber is also connected to the continuous pressure chamber in the continuous pressure pipe hidden in the container through the boosting valve and the flow channel structure, and the continuous pressure piston and the continuous pressure spring that keeps the volume of the continuous pressure chamber decreasing are installed in the continuous pressure pipe, and the continuous pressure chamber is connected to the liquid outlet one-way valve through the flow channel structure; The flow channel structure is arranged on the pump body and the large cover, and includes a transverse flow channel and a longitudinal flow channel that are interconnected. The upper longitudinal flow channel is distributed on the pump body, and the lower longitudinal flow channel is distributed in the large cover. The upper longitudinal flow channel and the lower longitudinal flow channel are sealed and connected to each other. The transverse flow channel is distributed in the pump body, with the outlet of the main piston boosting chamber as the boundary. The transverse flow channel in the front section is the liquid outlet flow channel, which is used to connect the outlet of the main piston boosting chamber and the liquid outlet one-way valve. The transverse flow channel and the longitudinal flow channel in the middle and rear sections are connected to form a continuous pressure flow channel, which is used to connect the outlet of the main piston boosting chamber and the continuous pressure chamber.

2. The liquid spray pump according to claim 1, characterized in that: Filling rods are arranged in the transverse flow channel and / or the longitudinal flow channel.

3. The liquid spray pump according to claim 1, characterized in that: The transverse flow channel is distributed in the pump body, and is divided into an isolated front section transverse flow channel and a rear section transverse flow channel. The front section transverse flow channel is a liquid outlet flow channel, which is used to connect the outlet of the main piston boosting chamber and the liquid outlet one-way valve. The rear section transverse flow channel and the longitudinal flow channel are connected to form a continuous pressure flow channel, which is used to connect the outlet of the main piston boosting chamber and the continuous pressure chamber. In addition, there is another connecting flow channel arranged in the pump body, which is combined with the longitudinal flow channel to connect the continuous pressure chamber and the liquid outlet one-way valve.

4. The liquid spray pump according to claim 3, characterized in that: The flow channel structure is provided with a filling rod in the flow channel. The filling rod adopts a filling rod with a non-circular cross-section and is fixed in the pump body by size matching. An isolated front section transverse flow channel and a rear section transverse flow channel are opened on the bottom surface of the filling rod. The front section transverse flow channel serves as a liquid outlet flow channel to connect the outlet of the main piston boosting chamber and the liquid outlet one-way valve, while the rear section transverse flow channel serves as a part of the continuous pressure flow channel. Combined with the longitudinal part of the continuous pressure flow channel, the outlet of the main piston boosting chamber is connected to the continuous pressure chamber. In addition, another transverse flow channel is opened on the top surface of the filling rod, which is combined with the longitudinal hole at the tail end of the filling rod or the size is reduced to form another connecting flow channel connecting the continuous pressure chamber and the liquid outlet one-way valve.

5. The liquid spray pump according to claim 1, characterized in that: The transverse flow channel is distributed in the pump body and is used to connect the outlet of the main piston boosting chamber and the continuous pressure chamber. Another connecting flow channel is arranged in the pump body, combined with the longitudinal flow channel to connect the continuous pressure chamber and the liquid outlet one-way valve.

6. The liquid spray pump according to claim 5, characterized in that: The flow channel structure is provided with a filling rod in the flow channel. The filling rod adopts a filling rod with a non-circular cross-section and is fixed in the pump body by size matching. A transverse flow channel is opened on the bottom surface of the filling rod as a part of the liquid outlet flow channel. At the same time, as a part of the continuous pressure flow channel, another transverse flow channel is opened on the top surface of the filling rod to combine with the longitudinal hole at the tail end of the filling rod or the size reduction to form another connecting flow channel connecting the continuous pressure chamber and the liquid outlet one-way valve. At the same time, the other connecting flow channel is connected to the transverse flow channel opened on the bottom surface of the filling rod to form a complete liquid outlet flow channel.

7. The liquid spray pump according to any one of claims 1 to 5, characterized in that: The pressure-continuing pipe is a hollow pipe with upper and lower openings. An open bottom plug is provided at the lower opening of the pressure-continuing pipe. The pressure-continuing pipe is fixed to the lower end of the large cover by threaded connection or clamping. A gasket is lined between the upper edge of the pressure-continuing pipe and the lower end surface of the large cover.

8. The liquid spray pump according to claim 7, characterized in that: A spring column is convexly provided on the inner side surface of the bottom plug, the lower end of the continuous pressure spring is sleeved on the spring column, the upper end of the continuous pressure spring is supported against the lower end of the continuous pressure piston, and an annular groove is provided on the middle outer wall surface of the continuous pressure piston, and a sealing ring is embedded in the annular groove to resist against the inner wall of the continuous pressure tube for increasing the sealing performance.

9. The liquid spray pump according to any one of claims 1 to 5, characterized in that: The upper end of the main piston boosting chamber of the pump body is provided with a boosting valve, the boosting valve includes a boosting valve seat, the boosting valve seat is longitudinally provided with a through hole, the outer wall of the boosting valve seat is sealed and fixed with the inner wall of the main piston boosting chamber of the pump body, the upper end of the boosting valve seat is a reduced diameter section, and a liquid outlet hole is horizontally opened at the upper part of the reduced diameter section, the boosting valve core is a silicone sleeve structure, the boosting valve core is sleeved outside the reduced diameter section of the boosting valve seat, the thickness of the upper part of the boosting valve core corresponding to the liquid outlet hole is thinned, the main piston rod is coaxially arranged below the boosting valve, the main piston rod is a hollow rod with a wide upper end and a narrow lower end, the upper end of the main piston rod presents a hollow main piston, the outer wall of the main piston is sealed against the inner wall of the main piston boosting chamber of the pump body, a main valve is provided at the opening position at the bottom of the main piston inner cavity at the upper end of the main piston rod, the lower end of the main piston rod is connected with the suction pipe through the large cover, and a main working spring is supported between the upper end of the main piston rod and the boosting valve seat.

10. The liquid spray pump according to claim 9, characterized in that: The lower end of the large cover has an internal thread structure connected to the container, and the middle part of the upper end surface of the large cover is convexly provided with an outer ring that is engaged with the lower end opening of the pump body and an inner ring for the lower end of the main piston rod to pass through. The wrench is installed on the front side of the pump body and below the nozzle, and a wrench switch is provided at the lower end of the wrench. The upper and middle part of the wrench is connected to the pump body through a pivot structure, and the inner push foot of the wrench passes through the wall guide hole of the pump body and contacts the lower bottom surface of the main piston at the upper end of the main piston rod to achieve connection with the main piston rod. By pulling the wrench, the main piston rod can be moved up and down.

11. The liquid spray pump according to any one of claims 1 to 5, characterized in that: A mounting seat for installing a liquid outlet one-way valve is provided on the front side of the upper end of the pump body. The liquid outlet one-way valve includes a small liquid outlet valve seat and a small liquid outlet valve seat cover. The small liquid outlet valve seat cover is fixedly arranged in the mounting seat. The small liquid outlet valve seat cover is fixedly connected with the small liquid outlet valve seat buckle. A small liquid outlet valve and a small liquid outlet valve spring are provided in the small liquid outlet valve seat. The nozzle is installed at the front end of the mounting seat, and the aperture of the nozzle is 0.38-0.4mm.

12. The liquid spray pump according to any one of claims 1 to 5, characterized in that: The pump body is provided with an outer shell and an upper cover. The outer shell covers the outside of the pump body. The lower end of the outer shell abuts against the container. The front side of the outer shell is provided with an escape opening corresponding to the position of the wrench. The upper cover is provided above the pump body and is ultrasonically welded to the upper end of the outer shell. Openings for the nozzle to extend out are provided on the front sides of the upper cover and the outer shell.

Images