Liquid ejection device

Abstract

The utility model discloses a liquid injection device, it includes by from top to bottom fixed cavity, support and base, the cavity includes liquid inlet pipe and sprays liquid pipe, the support is opened in and has piston cavity, the cavity is opened and has liquid inlet passage and liquid outlet passage, the liquid inlet passage is connected between the liquid inlet pipe with the piston cavity, the liquid inlet passage is equipped with first check valve for the one -way liquid of in the piston cavity, the liquid outlet passage is connected between the piston cavity with the sprays liquid pipe, the liquid outlet passage is equipped with second check valve for the one -way liquid of in the sprays liquid pipe, be equipped with piston in the piston cavity and both slide fit, be equipped with piston drive mechanism for drive the piston up and down movement in the base. The utility model can accurately control the opening and closing state of liquid inlet passage, better realized liquid flow, injection interval's regulation and control, and the utility model structure is simple, compact, and the application cost is lower.

Description

Technical Field

[0001] This utility model relates to a liquid conveying device, and more particularly to a liquid injection device. Background Technology

[0002] In the prior art, many devices require liquid jetting devices. Taking inkjet printers as an example, ink needs to be delivered in a timely and sufficient manner according to the ink consumption. For relevant jetting devices, please refer to Chinese Patent Publication No. CN110682687B, entitled "Liquid Jetting Device and Maintenance Method of Liquid Jetting Device," which describes: "A differential pressure valve is provided at the middle position of the liquid supply channel. When the pressure inside the liquid jetting section becomes a predetermined negative pressure relative to atmospheric pressure due to the liquid jetting action, the differential pressure valve opens. When the differential pressure valve opens, liquid is supplied from the reservoir to the liquid jetting section. When the pressure inside the liquid jetting section rises due to the supply of liquid, the differential pressure valve closes. The differential pressure valve will not open even when the pressure inside the liquid jetting section increases. Therefore, the differential pressure valve functions as a one-way valve that allows the supply of liquid from the upstream side (which becomes the reservoir side) to the downstream side (which becomes the liquid jetting section side), while suppressing the backflow of liquid from the downstream side to the upstream side." In the above structure, the on / off control method based on differential pressure valve cannot guarantee the flow rate and accuracy of liquid delivery, and at the same time, it cannot accurately control the opening and closing state of the inlet and outlet liquid channels. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a liquid injection device that is easy to control liquid flow, can accurately control the opening and closing state of the inlet and outlet liquid channels, and has a simple structure and low application cost, in order to address the shortcomings of the existing technology.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution.

[0005] A liquid injection device includes a cavity, a support, and a base fixed from top to bottom. The cavity includes an inlet pipe and a spray pipe. A piston chamber is formed in the support. An inlet channel and an outlet channel are formed in the cavity. The inlet channel connects the inlet pipe and the piston chamber. The inlet channel is provided with a first one-way valve for unidirectional liquid inflow into the piston chamber. The outlet channel connects the piston chamber and the spray pipe. The outlet channel is provided with a second one-way valve for unidirectional liquid outflow into the spray pipe. A piston is provided in the piston chamber and the two are slidably engaged. A piston drive mechanism is provided in the base for driving the piston to move up and down. When the piston descends, the first one-way valve is opened and the second one-way valve is closed, and liquid is drawn into the piston chamber through the inlet pipe. When the piston rises, the second one-way valve is opened and the first one-way valve is closed, and liquid in the piston chamber is sprayed out through the spray pipe.

[0006] Preferably, the bottom of the cavity is provided with a first ball valve receiving port, which is located at the lower end opening of the liquid inlet channel. The first one-way valve is spherical and is located inside the first ball valve receiving port and can move up and down.

[0007] Preferably, the top of the cavity is provided with a second ball valve receiving port, which is connected between the liquid outlet channel and the spray pipe. The second one-way valve is spherical and is located inside the second ball valve receiving port and can move up and down.

[0008] Preferably, a top cover is fixed to the top of the cavity, and the top cover covers the second ball valve receiving port.

[0009] Preferably, the piston includes an iron core extending into the base, and the piston drive mechanism includes a coil for driving the iron core to slide.

[0010] Preferably, a copper sleeve is fixed inside the base, the iron core is inserted into the copper sleeve and the two are slidably engaged, and a spring for lifting the piston is provided inside the copper sleeve.

[0011] Preferably, the piston has an annular groove on its outer side, and a rubber ring is provided in the annular groove, the rubber ring being sealed to the inner wall of the piston cavity.

[0012] Preferably, the upper end of the copper sleeve has an outer edge, the lower end of the support has an inner edge, the outer edge is located above the inner edge and the two abut against each other, and a fastening sleeve is screwed onto the lower end of the copper sleeve, the fastening sleeve abutting against the bottom of the base.

[0013] Preferably, the side of the base is provided with a coil controller for controlling the power-on state of the coil.

[0014] Preferably, the base has an electrical connector on its side, the coil controller has an electrical connection hole on its side, and the electrical connector is located in the electrical connection hole.

[0015] In the liquid injection device disclosed in this utility model, the cavity, support, and base are fixedly connected sequentially from top to bottom. The cavity provides inlet and outlet liquid channels, the support provides a piston chamber for the piston's up-and-down movement, and the base serves to support, fix, and house the piston drive mechanism. Since the inlet and outlet liquid channels are respectively controlled by a first one-way valve and a second one-way valve, when the piston moves downward, only the first one-way valve is open, allowing liquid to be drawn into the piston chamber through the inlet pipe. When the piston moves upward, only the second one-way valve is open, allowing liquid in the piston chamber to be ejected through the injection pipe. Based on the above structure, this utility model achieves one-way liquid inlet and one-way liquid injection functions. By controlling the timing of the piston's up-and-down movement and the duration of the upward and downward states, the opening and closing states of the inlet and outlet liquid channels can be accurately controlled, effectively regulating the liquid flow rate and injection interval. Furthermore, this utility model has a simple and compact structure and lower application costs. Attached Figure Description

[0016] Figure 1 This is a perspective view of the liquid injection device of this utility model;

[0017] Figure 2 This is an exploded view of the liquid injection device of this utility model;

[0018] Figure 3 A three-dimensional view of the cavity;

[0019] Figure 4 This is a structural diagram of the cavity and top cover;

[0020] Figure 5 This is a side view of the liquid injection device of this utility model;

[0021] Figure 6 for Figure 5 A sectional view along line AA.

[0022] Figure 7 This is a structural diagram of the piston, copper sleeve, and spring. Detailed Implementation

[0023] The present invention will now be described in more detail with reference to the accompanying drawings and embodiments.

[0024] This utility model discloses a liquid injection device, combined with Figures 1 to 7As shown, it includes a cavity 1, a support 2, and a base 3 fixed from top to bottom. The cavity 1 includes an inlet pipe 10 and a spray pipe 11. A piston chamber 20 is formed inside the support 2. An inlet channel 12 and an outlet channel 13 are formed inside the cavity 1. The inlet channel 12 connects the inlet pipe 10 and the piston chamber 20. The inlet channel 12 is provided with a first one-way valve 15 for one-way liquid inflow into the piston chamber 20. The outlet channel 13 connects the piston chamber 20 and the spray pipe 11. The outlet channel 13 is provided with a first one-way valve 15 for one-way liquid inflow into the piston chamber 20. A second one-way valve 16 is provided for one-way liquid discharge to the spray pipe 11. A piston 4 is provided in the piston chamber 20 and the two are slidably engaged. A piston drive mechanism is provided in the base 3 for driving the piston 4 to move up and down. When the piston 4 descends, the first one-way valve 15 is opened and the second one-way valve 16 is closed, and liquid is drawn into the piston chamber 20 through the liquid inlet pipe 10. When the piston 4 rises, the second one-way valve 16 is opened and the first one-way valve 15 is closed, and the liquid in the piston chamber 20 is sprayed out through the spray pipe 11.

[0025] In the above structure, the cavity 1, support 2, and base 3 are fixedly connected from top to bottom. The cavity 1 provides inlet and outlet channels, the support 2 provides a piston chamber 20 for the piston 4 to move up and down, and the base 3 serves to support and fix the piston and accommodate the piston drive mechanism. Since the inlet channel 12 and the outlet channel 13 are respectively controlled by a first one-way valve 15 and a second one-way valve 16, when the piston 4 moves downward, only the first one-way valve 15 is open, allowing liquid to be drawn into the piston chamber 20 through the inlet pipe 10. When the piston 4 moves upward, only the second one-way valve 16 is open, allowing liquid in the piston chamber 20 to be sprayed out through the spray pipe 11. Based on the above structure, this invention achieves the functions of one-way liquid inlet and one-way liquid spray. By controlling the timing of the piston 4's up and down movement and the duration of the rising and falling states, the opening and closing states of the inlet and outlet channels can be accurately controlled, effectively regulating the liquid flow rate and spray interval. Furthermore, this invention has a simple and compact structure and lower application costs.

[0026] To achieve the functions of unidirectional liquid inlet and unidirectional liquid spraying, in this embodiment, combined with Figures 2 to 4 As shown, the bottom of the cavity 1 is provided with a first ball valve receiving port 120, which is located at the lower end opening of the liquid inlet channel 12. The first one-way valve 15 is spherical and is located inside the first ball valve receiving port 120 and can move up and down.

[0027] Accordingly, the top of the cavity 1 is provided with a second ball valve receiving port 130, which is connected between the liquid outlet channel 13 and the spray pipe 11. The second one-way valve 16 is spherical and is located in the second ball valve receiving port 130 and can move up and down.

[0028] In the above structure, the advantage of using a ball valve is that it has a better sealing effect on the inlet and outlet liquid channels, and it can be opened quickly under the drive of positive liquid.

[0029] In order to seal the second ball valve receiving port 130, in this embodiment, a top cover 8 is fixed to the top of the cavity 1, and the top cover 8 covers the second ball valve receiving port 130. In this embodiment, the top cover 8 is preferably a sheet metal part, which is fixedly connected to the support 2 and the base 3 by four screws 80.

[0030] In this embodiment, the piston 4 is preferably driven up and down by an electromagnetic drive. Specifically, the piston 4 includes an iron core 40 extending into the base 3, and the piston drive mechanism includes a coil for driving the iron core 40 to slide.

[0031] To ensure the reliable up-and-down sliding of the iron core 40, in this embodiment, a copper sleeve 5 is fixed inside the base 3, and the iron core 40 is inserted into the copper sleeve 5 with the two slidingly engaged. A spring 6 is provided inside the copper sleeve 5 for lifting the piston 4. When the electromagnetic field generated by the coil disappears, the piston 4 can be lifted and reset by the elastic force applied by the spring 6.

[0032] In this embodiment, the piston 4 and the iron core 40 are integrally formed. Please refer to [link / reference]. Figure 7 The piston 4 has an annular groove 41 on its outer side, and a rubber ring 42 is provided in the annular groove 41. The rubber ring 42 is sealed to the inner wall of the piston cavity 20.

[0033] Regarding the preferred fixing method between the support 2 and the base 3, in this embodiment, the upper end of the copper sleeve 5 has an outer edge 50, and the lower end of the support 2 has an inner edge 22. The outer edge 50 is located above the inner edge 22, and the two abut against each other. A fastening sleeve 51 is screwed onto the lower end of the copper sleeve 5, and the fastening sleeve 51 abuts against the bottom of the base 3. The above structure achieves screwless matching. At the same time, the copper sleeve 5 provides sliding space for the iron core 40, and also utilizes the self-lubricating properties of copper to effectively reduce the movement damping of the iron core 40, thereby accurately controlling the injection flow rate.

[0034] To facilitate signal control of the uplink circuit, in this embodiment, the side of the base 3 is provided with a coil controller 7 for controlling the power-on state of the coil.

[0035] Regarding the specific electrical connection method, in this embodiment, the base 3 is provided with an electrical connector on its side, and the coil controller 7 is provided with an electrical connection hole 70 on its side, with the electrical connector located inside the electrical connection hole 70.

[0036] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. All modifications, equivalent substitutions or improvements made within the technical scope of the present utility model should be included within the scope of protection of the present utility model.

Claims

1. A liquid injection device, characterized in that, The device comprises a cavity (1), a support (2), and a base (3) fixed from top to bottom. The cavity (1) includes an inlet pipe (10) and a spray pipe (11). The support (2) has a piston chamber (20). The cavity (1) has an inlet channel (12) and an outlet channel (13). The inlet channel (12) connects the inlet pipe (10) and the piston chamber (20). The inlet channel (12) is equipped with a first one-way valve (15) for one-way liquid injection into the piston chamber (20). The outlet channel (13) connects the piston chamber (20) and the spray pipe (11). A second one-way valve (16) is provided for discharging liquid into the spray pipe (11) in one direction. A piston (4) is provided in the piston chamber (20) and the two are slidably engaged. A piston drive mechanism is provided in the base (3) for driving the piston (4) to move up and down. When the piston (4) descends, the first one-way valve (15) is turned on and the second one-way valve (16) is closed, and liquid is drawn into the piston chamber (20) through the inlet pipe (10). When the piston (4) rises, the second one-way valve (16) is turned on and the first one-way valve (15) is closed, and liquid in the piston chamber (20) is sprayed out through the spray pipe (11).

2. The liquid injection device as described in claim 1, characterized in that, The bottom of the cavity (1) is provided with a first ball valve receiving port (120), the first ball valve receiving port (120) is located at the lower end opening of the liquid inlet channel (12), the first one-way valve (15) is spherical, the first one-way valve (15) is located in the first ball valve receiving port (120) and can move up and down.

3. The liquid injection device as described in claim 1, characterized in that, The top of the cavity (1) is provided with a second ball valve receiving port (130), which is connected between the liquid outlet channel (13) and the liquid spray pipe (11). The second one-way valve (16) is spherical and is located in the second ball valve receiving port (130) and can move up and down.

4. The liquid injection device as described in claim 3, characterized in that, The top of the cavity (1) is fixed with a top cover (8), which covers the second ball valve receiving port (130).

5. The liquid injection device as described in claim 1, characterized in that, The piston (4) includes an iron core (40) extending into the base (3), and the piston drive mechanism includes a coil for driving the iron core (40) to slide.

6. The liquid injection device as described in claim 5, characterized in that, A copper sleeve (5) is fixed inside the base (3), and the iron core (40) is inserted into the copper sleeve (5) and the two slide together. A spring (6) for lifting the piston (4) is provided inside the copper sleeve (5).

7. The liquid injection device as claimed in claim 6, characterized in that, The piston (4) has an annular groove (41) on its outer side, and a rubber ring (42) is provided in the annular groove (41). The rubber ring (42) is sealed to the inner wall of the piston cavity (20).

8. The liquid injection device as claimed in claim 7, characterized in that, The upper end of the copper sleeve (5) has an outer edge (50), and the lower end of the support (2) has an inner edge (22). The outer edge (50) is located above the inner edge (22) and the two abut against each other. The lower end of the copper sleeve (5) is screwed with a fastening sleeve (51), and the fastening sleeve (51) abuts against the bottom of the base (3).

9. The liquid injection device as described in claim 5, characterized in that, The base (3) is provided with a coil controller (7) on its side for controlling the power-on state of the coil.

10. The liquid injection device as claimed in claim 9, characterized in that, The base (3) has an electrical connector on its side, and the coil controller (7) has an electrical connection hole (70) on its side, with the electrical connector located inside the electrical connection hole (70).

Images