Inverted liquid outlet pump

Abstract

The utility model discloses an inverted liquid outlet pump which comprises a threaded cover, a pump body, a piston cover, a piston pipe, a liquid outlet mechanism and a piston mechanism, a liquid inlet control valve is arranged at a liquid inlet of the pump body, and the liquid outlet mechanism is communicated with the liquid inlet of the pump body through the piston pipe, an inner cavity of the pump body and the piston mechanism. A valve membrane cover with an opening is arranged at the top end of the pump body and covers a liquid inlet of the pump body; the liquid inlet control valve is a spherical valve and is movably arranged between the valve membrane cover and the liquid inlet of the pump body; the anti-leakage valve is arranged at the butt joint position of the liquid outlet mechanism and the piston pipe, the anti-leakage valve is provided with the elastic protruding part, the protruding part is provided with the liquid outlet gap, the anti-leakage valve is of a sealing structure in the natural state, the liquid leakage phenomenon of the liquid inlet and outlet pump in the inverted state can be prevented, and the liquid inlet and outlet pump is simpler in structure, lower in cost, reliable and practical. In addition, the valve membrane is matched with the valve membrane cover, so that the phenomenon that the liquid containing bottle is deformed and even broken due to reduction of internal air pressure in the using process can be prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of sanitary cleaning products, in particular to an inverted liquid discharge pump. Background Art

[0002] In many occasions, there are some disinfection and hand washing facilities, such as hospitals, hotels, airports, docks, schools, stations and other places. Such facilities usually have upper liquid discharge mode and lower liquid discharge mode (i.e. inverted liquid discharge). The upper liquid discharge mode will leave more liquid in the bottle, causing waste. The lower liquid discharge mode can solve the problem of liquid residue, but the lower liquid discharge pump is prone to leakage. For this reason, it is necessary to set up a more complex structure to solve the leakage problem of the inverted liquid discharge pump, such as a liquid discharge pump mechanism disclosed in patent CN202021001158.8. However, due to the complex structure of the anti-leakage, the cost of the product will increase, and it will also be more prone to failure. In addition, the traditional structure using an inverted liquid discharge method cannot replace the air between the liquid bottle and the outside world, which will cause the liquid bottle to deform due to the drop in internal air pressure, and there is even a risk of rupture. Utility Model Content

[0003] The utility model aims at the defects of the prior art and provides an inverted liquid discharge pump which has a simpler structure, a more reasonable design, a lower cost, a higher reliability and can basically maintain the air pressure balance inside and outside the bottle.

[0004] In order to solve the above technical problems, the utility model adopts the following technical solutions: an inverted liquid discharge pump, including a threaded cover, a pump body, a piston cover, a piston tube, a liquid discharge mechanism and a piston mechanism, the upper part of the pump body is connected to the threaded cover, the piston tube is inserted into the pump body from the lower end of the pump body, the piston mechanism is arranged in the pump body and docked with the upper end of the piston tube, and the liquid discharge mechanism is connected to the lower end of the piston tube; a liquid inlet control valve is arranged at the liquid inlet of the pump body, and the liquid discharge mechanism is connected to the liquid inlet of the pump body through the piston tube, the inner cavity of the pump body and the piston mechanism, and is characterized in that: a valve membrane cover with an opening is installed at the top of the pump body, and the valve membrane cover The liquid inlet cover of the pump body is covered, and the pump body is connected to the outside world through the opening of the valve membrane cover; the liquid inlet control valve is a spherical valve, which is movably arranged between the valve membrane cover and the liquid inlet of the pump body, and the size of the spherical valve is larger than the liquid inlet of the pump body and the opening of the valve membrane cover; a leak-proof valve is arranged at the position where the liquid outlet mechanism and the piston tube are connected, and the leak-proof valve has an elastic protrusion, and the protrusion protrudes toward the liquid inlet direction; a liquid outlet gap is arranged on the protrusion, and the liquid outlet gap is in a closed state to form a closed leak-proof structure when the protrusion is not subjected to pressure, and the liquid outlet gap opens to form a liquid outlet channel after the protrusion is subjected to pressure.

[0005] Preferably, the middle part of the anti-leakage valve bulges in an arc shape toward the liquid inlet direction to form a spherical protrusion, the liquid outlet gap is a straight gap, a cross gap, a criss-cross gap or a criss-cross gap, and the center of the liquid outlet gap is located at the center of the protrusion.

[0006] Furthermore, a circle of additional cover is extended outward and downward on the side wall of the valve membrane cover, and the additional cover forms a sealed connection with the pump body; an air inlet hole is arranged in the area covered by the additional cover on the pump body, and the air inlet hole is connected to the space covered by the additional cover, and a valve membrane is arranged in the additional cover to seal the air inlet hole; a balancing hole is arranged on the additional cover, and after the threaded cover is fixed to the liquid container, the interior of the liquid container and the space covered by the additional cover are connected through the balancing hole, and after the valve membrane is pushed open, the outside of the threaded cover and the space covered by the additional cover are connected through the air inlet hole.

[0007] Furthermore, the liquid outlet mechanism includes a spray head and a nozzle, the spray head is fixedly connected to the piston tube, and the nozzle is fixedly connected to the spray head.

[0008] Furthermore, the anti-leakage valve is arranged between the bottom end of the piston tube and the nozzle, and the raised portion of the anti-leakage valve is made of rubber, such as silicone.

[0009] Furthermore, a return spring is arranged in the pump body, and the return spring presses against the top of the piston mechanism to form a return pushing structure for the piston tube.

[0010] Furthermore, the piston mechanism includes a piston seat and a piston sleeve, the top end of the piston seat abuts against the return spring, and the bottom end of the piston seat extends into the piston tube; the piston sleeve is arranged on the outside of the piston seat to form a sealed contact with the inner wall of the pump body, and the bottom end of the piston sleeve is connected and fixed to the top end of the piston tube.

[0011] Furthermore, the piston tube is inserted into the pump body from the lower end of the pump body through the cooperation of a piston cover, and the piston cover and the bottom end of the pump body form a sealed connection structure.

[0012] Furthermore, a gasket is arranged on the inner bottom surface of the threaded cover, and after the threaded cover is butted against the liquid container, a sealing structure is formed through the gasket to prevent liquid leakage from the butt joint.

[0013] The utility model controls the liquid inlet through the ball valve and controls the liquid outlet through the anti-leakage valve. The anti-leakage valve is a sealing structure in a natural state, which can prevent the inlet and outlet pump from leaking in an inverted state. The structure is simpler, so the cost is lower, and it is reliable and practical. In addition, the valve membrane and the valve membrane cover cooperate, and the air inlet hole and the balance hole are provided to connect to the atmosphere, so that the liquid bottle can be prevented from being deformed or even broken due to the reduction of internal air pressure during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is the overall structure diagram of the utility model;

[0015] Figure 2 This is the front structural diagram of the utility model;

[0016] Figure 3This is a cross-sectional structural diagram of the utility model;

[0017] Figure 4 for Figure 3 A partial enlarged view of

[0018] Figure 5 This is the structural diagram of the anti-leakage valve.

[0019] In the figure, 1 is a threaded cover, 2 is a pump body, 3 is a piston cover, 4 is a piston tube, 5 is a nozzle, 6 is a nozzle, 7 is a valve membrane cover, 8 is a ball valve, 9 is a gasket, 10 is a valve membrane, 11 is a return spring, 12 is a piston seat, 13 is a piston sleeve, 14 is a leak-proof valve, 15 is a raised portion, 16 is a liquid outlet gap, 17 is an additional cover, 18 is a balance hole, and 19 is an air inlet hole. DETAILED DESCRIPTION

[0020] In this embodiment, refer to Figure 1-Figure 5 The inverted liquid discharge pump comprises a threaded cover 1, a pump body 2, a piston cover 3, a piston tube 4, a liquid discharge mechanism and a piston mechanism. The upper part of the pump body 2 is connected to the threaded cover 1, the piston tube 4 is inserted into the pump body 2 from the lower end of the pump body 2, the piston mechanism is arranged in the pump body 2 and docked with the upper end of the piston tube 4, and the liquid discharge mechanism is connected to the lower end of the piston tube 4; a liquid inlet control valve is arranged at the liquid inlet of the pump body 2, and the liquid discharge mechanism is connected to the liquid inlet of the pump body 2 through the piston tube 4, the inner cavity of the pump body 2 and the piston mechanism; a valve membrane cover 7 with an opening is installed at the top of the pump body 2, the valve membrane cover 7 covers the liquid inlet of the pump body 2, and the pump body 2 is connected to the outside through the opening of the valve membrane cover 7, so as to facilitate the connection with the liquid container; the liquid inlet control valve is a ball valve 8, which It is arranged between the valve membrane cover 7 and the liquid inlet of the pump body 2 and can move up and down between the valve membrane cover 7 and the pump body 2, and the size of the ball valve 8 is larger than the liquid inlet of the pump body 2 and the opening of the valve membrane cover 7, so as to prevent the liquid from entering the pump body 2 or escaping from the opening of the valve membrane cover 7; a leak-proof valve 14 is arranged at the position where the liquid discharge mechanism and the piston tube 4 are connected, and the leak-proof valve 14 has an elastic protrusion 15, and the protrusion 15 protrudes toward the liquid inlet direction (i.e. upward); a liquid discharge gap 16 is arranged on the protrusion 15, and the liquid discharge gap 16 is in a closed state to form a closed leak-proof structure when the protrusion 15 is not subjected to pressure, and the liquid discharge gap 16 opens to form a liquid discharge channel after the protrusion is subjected to pressure (upward or downward pressure), and the liquid can be discharged at this time.

[0021] The middle part of the anti-leakage valve 14 bulges in an arc shape toward the liquid inlet direction to form a spherical protrusion 15, and the liquid outlet gap 16 is a straight gap, a cross gap, a mitre gap or a mitre gap, especially a straight gap or a cross gap is better, and the center of the liquid outlet gap 16 is located at the center of the protrusion 15.

[0022] A circle of additional cover 17 extends outward and downward from the side wall of the valve membrane cover 7, and the additional cover 17 forms a sealed connection with the pump body 2, with a cavity in the middle; an air inlet hole 19 is provided in the area covered by the additional cover on the pump body 2, and the air inlet hole 19 is connected to the space covered by the additional cover 17, and a valve membrane 10 is provided in the additional cover 17 to seal the air inlet hole 19; a balance hole 18 is provided on the additional cover 17, and after the threaded cover 17 is fixed to the liquid container, the inside of the liquid container is connected to the space covered by the additional cover 17 through the balance hole 18, and after the valve membrane 10 is pushed open, the outside of the threaded cover 1 is connected to the space covered by the additional cover 17 through the air inlet hole 19 and the hole of the threaded cover 1. After repeated use, as the liquid in the liquid container decreases, the air pressure will decrease. At this time, external air enters the air inlet 19 from the hole in the threaded cover 1, pushes open the valve membrane 10, and then enters the liquid container through the balance hole 18 on the valve membrane cover 7, so that the air pressure inside and outside the liquid container remains basically the same, and then the valve membrane 10 closes the air inlet 19 again.

[0023] The liquid outlet mechanism includes a spray head 5 and a nozzle 6 . The spray head 5 is connected and fixed to the piston tube 4 , and the nozzle 6 is connected and fixed to the spray head 5 .

[0024] The anti-leakage valve 14 is arranged between the bottom end of the piston tube 4 and the nozzle 5, and the raised portion 15 of the anti-leakage valve 14 is made of rubber, such as silica gel.

[0025] A return spring 11 is arranged in the pump body 2. The return spring 11 presses against the top of the piston mechanism to form a return pushing structure for the piston tube 4, so that the piston tube 4 will automatically extend after being pressed.

[0026] The piston mechanism includes a piston seat 12 and a piston sleeve 13. The top end of the piston seat 12 abuts against the return spring 11, and the bottom end of the piston seat 12 extends into the piston tube 4. The piston sleeve 13 is sleeved on the outside of the piston seat 12 to form a sealed contact with the inner wall of the pump body 2, and the bottom end of the piston sleeve 13 is connected and fixed to the top end of the piston tube 4.

[0027] The piston tube 4 is inserted into the pump body 2 from the lower end of the pump body 2 through the cooperation of a piston cover 3, and the piston cover 3 and the bottom end of the pump body 2 form a sealed connection structure.

[0028] A gasket 9 is provided on the inner bottom surface of the threaded cap 1. After the threaded cap 1 is butted against the liquid container, a sealing structure is formed through the gasket 9 to prevent liquid leakage from the butt joint.

[0029] Liquid entry process: When the liquid outlet pump is inverted, the telescopic spring 11 in the pump body 2 is in a released state, the ball valve 8 sinks, and the liquid enters the chamber of the pump body 2; at the same time, the liquid outlet gap of the anti-leakage valve 14 is in a closed state, preventing the liquid from flowing out and playing a leak-proof role.

[0030] Liquid spraying process: Press the nozzle 5, so that the piston tube 4 drives the piston sleeve 13 and the piston seat 12, the return spring 11 is compressed, the volume of the chamber of the pump body 2 becomes smaller, and the ball valve 8 moves upward after being squeezed by the liquid to close the opening of the valve membrane cover 7 to prevent the liquid from flowing back. At the same time, the anti-leakage valve 14 is squeezed by the liquid, thereby opening the sealed liquid outlet gap, passing through the nozzle 5 and spraying out from the nozzle 6.

[0031] The present invention has been described in detail above. The above description is only a preferred embodiment of the present invention and should not limit the scope of implementation of the present application. All equivalent changes and modifications made within the scope of the present application should still fall within the scope of the present invention.

Claims

1. An inverted liquid discharge pump, comprising a threaded cover, a pump body, a piston cover, a piston tube, a liquid discharge mechanism and a piston mechanism, wherein the upper part of the pump body is connected to the threaded cover, the piston tube is inserted into the pump body from the lower end of the pump body, the piston mechanism is arranged in the pump body and docked with the upper end of the piston tube, and the liquid discharge mechanism is connected to the lower end of the piston tube; a liquid inlet control valve is arranged at the liquid inlet of the pump body, and the liquid discharge mechanism is connected to the liquid inlet of the pump body through the piston tube, the inner cavity of the pump body and the piston mechanism, and is characterized in that: A valve diaphragm cover with an opening is installed at the top of the pump body, and the valve diaphragm cover covers the liquid inlet of the pump body, and the pump body is connected to the outside through the opening of the valve diaphragm cover; the liquid inlet control valve is a spherical valve, which is movably arranged between the valve diaphragm cover and the liquid inlet of the pump body, and the size of the spherical valve is larger than the liquid inlet of the pump body and the opening of the valve diaphragm cover; a leak-proof valve is arranged at the position where the liquid outlet mechanism and the piston tube are connected, and the leak-proof valve has an elastic protrusion, and the protrusion protrudes toward the liquid inlet direction; a liquid outlet gap is arranged on the protrusion, and the liquid outlet gap is in a closed state when the protrusion is not subjected to pressure to form a closed leak-proof structure, and the liquid outlet gap opens to form a liquid outlet channel after the protrusion is subjected to pressure.

2. The inverted liquid discharge pump according to claim 1, characterized in that: The middle part of the anti-leakage valve is arc-shaped and bulges toward the liquid inlet direction to form a spherical bulge, the liquid outlet gap is a straight gap, a cross gap, a mitre gap or a mitre gap, and the center of the liquid outlet gap is located at the center of the bulge.

3. The inverted liquid discharge pump according to claim 1, characterized in that: A circle of additional cover extends outward and downward on the side wall of the valve diaphragm cover, and the additional cover forms a sealed connection with the pump body; an air inlet hole is arranged in the area covered by the additional cover on the pump body, and the air inlet hole is connected to the space covered by the additional cover, and a valve diaphragm is arranged in the additional cover to seal the air inlet hole; a balancing hole is arranged on the additional cover, and after the threaded cover is fixed to the liquid container, the interior of the liquid container and the space covered by the additional cover are connected through the balancing hole, and after the valve diaphragm is pushed open, the outside of the threaded cover and the space covered by the additional cover are connected through the air inlet hole.

4. The inverted liquid discharge pump according to claim 1, characterized in that: The liquid outlet mechanism comprises a spray head and a nozzle, the spray head is connected and fixed to the piston tube, and the nozzle is connected and fixed to the spray head.

5. The inverted liquid discharge pump according to claim 4, characterized in that: The anti-leakage valve is arranged between the bottom end of the piston tube and the nozzle, and the raised part of the anti-leakage valve is made of rubber.

6. The inverted liquid discharge pump according to claim 1, characterized in that: A return spring is arranged in the pump body, and the return spring presses against the top of the piston mechanism to form a return pushing structure for the piston tube.

7. The inverted liquid discharge pump according to claim 6, characterized in that: The piston mechanism includes a piston seat and a piston sleeve. The top end of the piston seat abuts against the return spring, and the bottom end of the piston seat extends into the piston tube. The piston sleeve is sleeved on the outside of the piston seat to form a sealed contact with the inner wall of the pump body, and the bottom end of the piston sleeve is connected and fixed to the top end of the piston tube.

8. The inverted liquid discharge pump according to claim 1, characterized in that: The piston tube is inserted into the pump body from the lower end of the pump body through the cooperation of a piston cover, and the piston cover and the bottom end of the pump body form a sealed connection structure.

9. The inverted liquid discharge pump according to claim 1, characterized in that: A gasket is arranged on the inner bottom surface of the threaded cover, and a sealing structure is formed by the gasket after the threaded cover is butted against the liquid container.

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