CN205841117U - A kind of foot-operated siphonal water pump - Google Patents

Abstract

The utility model discloses a foot-operated siphon water pump; it comprises two left and right pumping mechanisms with the same structure, a support rod installed between them, and a foot pedal arranged on the support rod; the two pumping mechanisms both include A pump body and a piston placed in the pump body, each piston is connected to the two ends of the pedal through a connecting rod; there is a one-way check valve on the piston, and a one-way water stop valve at the bottom of the pump body; two pumps The water inlets of the two pump bodies are interconnected through the water inlet branch pipe and then connected to the water inlet main pipe; the water outlets of the upper pump chambers of the two pump bodies are interconnected through a water outlet branch pipe, and then connected to the water outlet main pipe. This water pump does not need electricity or oil, and only with the weight of the human body, the feet alternately and continuously step on the pedals, so that the pistons in the left and right pump bodies run alternately and continuously up and down, until the low-level water is introduced into the water in the outlet pipe, and They are collected in the main water outlet pipe and then flow out, so as to realize the water pressure from the low place to the high place.

Description

A foot-operated siphon water pump

technical field

The utility model relates to a pumping device for water conservancy projects, in particular to a foot-operated siphon pump and a pumping method thereof.

Background technique

When watering agricultural vegetable fields or small grain crops in rural areas, if there is no self-flowing irrigation channel, electric pumps are generally used to pump water, or human-driven water trucks are used to pump water, and the most primitive method is to carry water manually.

(1) Agricultural water vehicle

An old-fashioned agricultural water-lifting tool, the wheel is turned by manpower to drive the water leaf, and the water is raised from a low place to a high place. The structure of the waterwheel is simple, and it is generally composed of a water tank (a long and straight wooden box), a water leaf (loose leaf), a crutch, and a shelf. It can be placed arbitrarily on the field ridge near the river or pond, just put the water tank equipped with paddles into the water, and then one person or two or three people can step on the pedals of the water wheel at the same time, and the water wheel will drive after the water wheel turns. The paddles, the water in the river pond will be lifted up one by one in the tank with the paddles, and flow into the rice fields continuously.

Lifting water by waterwheel generally requires the cooperation of two or more people, which is laborious and heavy, and the water lifting height is generally below 3m.

(2) water pump

A pump is a machine that transports or pressurizes a liquid. It transmits the mechanical energy of the prime mover or other external energy to the liquid to increase the energy of the liquid. It is mainly used to transport liquids including water, oil, acid and alkali, emulsions, suspoemulsions and liquid metals, etc., and can also transport liquid and gas mixtures. and liquids containing suspended solids. There are three types of water pumps: centrifugal pumps, axial flow pumps and mixed flow pumps, all of which are driven by electricity.

(3) Manpower carrying water

Manually poke water with water.

All three of the above methods have drawbacks. Water pumping requires electricity, and there is often no power supply in the field, and the water pump is relatively heavy and expensive; waterwheel pumping is not only heavy and does not move, but also generally requires the cooperation of multiple people, and the water lifting height is small (generally less than 3m) , is restricted by geographical conditions; artificially carrying water is a very inefficient method, and it is not suitable for the elderly.

Contents of the invention

The purpose of the utility model is to overcome the shortcomings and deficiencies of the above-mentioned prior art, and provide a foot-operated siphon water pump with simple structure, time-saving and labor-saving, convenient portability and high efficiency.

The utility model is realized through the following technical solutions:

A foot-operated siphon water pump, comprising two left and right pumping mechanisms with the same structure, a support rod 1 installed between the two pumping mechanisms, and a foot pedal 2 movably arranged on the support rod 1; the two pumping mechanisms Each includes a pump body 3 with a cylindrical structure and a piston 4 placed in the pump body 3. The piston 4 divides the inner space of the pump body 3 into an upper pump chamber 5 and a lower pump chamber 6. Each piston 4 passes through a The connecting rod 7 is movable and hinged at the end of the pedal 2 corresponding thereto;

Each piston 4 is provided with a one-way check valve 8, which automatically opens when the piston 4 moves downward, the volume of the lower pump chamber 6 gradually decreases, and automatically closes when the piston 4 moves upward, and the volume of the lower pump chamber 6 gradually increases;

There is a water inlet at the bottom of each pump body 3, and a one-way water stop valve 9 is installed at the water inlet. When the piston 4 goes down, it is automatically closed, and the water or air in the lower pump chamber 6 opens the one-way check valve 8 and Enter the upper pump chamber 5 above the piston 4; when the piston 4 goes up, the one-way water stop valve 9 automatically opens, the one-way check valve 8 closes, and gradually discharges the water or air entering the upper pump chamber 5 to the upper pump chamber other than 5;

After the water inlets of the two pump bodies 3 are interconnected through a water inlet branch pipe 10, they are connected to the water inlet main pipe 11; after the water outlets of the upper pump chamber 5 of the two pump bodies 3 are interconnected through a water outlet branch pipe 12, Connect the water outlet main pipe 13 again.

The middle part of the pedal 2 uses the support rod 1 as a fulcrum. When the left and right ends of the pedal 2 move up and down alternately, the connecting rod 7 drives each piston 4 to move up and down alternately in the corresponding pump body 3. That is, when the piston 4 of one of the pumping mechanisms goes down, the piston 4 of the other pumping mechanism goes up;

When the piston 4 moves from bottom to top, the one-way check valve 8 is closed, and the lower pump chamber 6 is in a vacuum state. Under the action of vacuum, the source water at the lower level gradually enters the lower pump chamber 6 through the one-way water stop valve 9 At this time, if the piston 4 ends its stroke from bottom to top and changes from top to bottom, the one-way check valve 8 will automatically open, and the one-way water stop valve 9 will automatically close. At this time, the volume of the lower pump chamber 6 gradually increases. shrinks, the volume of the upper pump chamber 5 gradually increases, and the water in the lower pump chamber 6 gradually enters the upper pump chamber 5 above the piston 4 through the one-way check valve 8. When changing from bottom to top, the water level in the upper pump chamber 5 is raised by the gradually rising piston 4, and flows into the water outlet branch pipe 12 through the water outlet of the upper pump chamber 5;

The pistons 4 of the two water pumping mechanisms reciprocate and continuously alternately operate in this way, so that the water that flows into the water outlet branch pipe 12 respectively is collected in the water outlet main pipe 13 and then flows out.

In the initial state of the foot-operated siphon water pump, the air pressure in the water inlet branch pipe and the water inlet main pipe is an atmospheric pressure P. At this time, one of the pistons is moved up by h1 through the transmission of the pedal 2, and the one-way water stop valve 9 is opened. Close the check valve 8. At this time, due to the upward movement of the piston, the volume of the gas in the lower pump chamber 6 increases to V1, and the pressure decreases to P1. Under the action of the internal and external pressure difference, the water rises to a height of h2. The gas volume is V, the inner diameter of the lower pump chamber 6 is d, and the inner diameters of the water inlet branch pipe and the water inlet main pipe are d0 _;

From the ideal gas state equation: PV=P ₁ V ₁

Geometric relationship:

Equilibrium condition: P=P ₁ +ρgh ₂

From these three equations, the relationship equation between h ₁ and h ₂ can be solved, namely It can be seen that h ₁ is proportional to h ₂ , when h ₁ is the largest, h ₂ is also the largest;

When the piston descends, the one-way water stop valve 9 is closed, and the one-way check valve 8 is opened to exhaust until the piston reaches the bottom of the lower pump chamber 6; at this moment, the pressure in the water inlet branch pipe and the water inlet main pipe remains P1 _; At this time, the gas volume V in the lower pump chamber ₆ is only the volume of the water inlet branch pipe and the water inlet main pipe minus the volume of the rising water column.

${\mathrm{<span\; class="notranslate">\; V</span>}}_{\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; =</span>\mathrm{<span\; class="notranslate">\; V</span>}<span\; class="notranslate">\; -</span>\frac{{\mathrm{<span\; class="notranslate">\; \&pi;d</span>}}^{\mathrm{<span\; class="notranslate">\; 2</span>}}}{\mathrm{<span\; class="notranslate">\; 4</span>}}<span\; class="notranslate">\; *</span>{\mathrm{<span\; class="notranslate">\; h</span>}}_{\mathrm{<span\; class="notranslate">\; 1</span>}}<span\; class="notranslate">\; .</span>$

The water outlets of the upper pump chambers 5 of the two pump bodies 3 are respectively provided with downwardly inclined water outlet joints 14, and the two ends of the water outlet branch pipes 12 are respectively bridged between them; The water outlet forms a height difference; the interface between the water outlet main pipe 13 and the water outlet branch pipe 12 is lower than the water outlet.

The two pumping mechanisms are symmetrically fixed on a support frame 15; the support frame 15 is a lifting structure.

The piston 4 is composed of a bowl-type rubber ring and a metal washer, and the one-way water stop valve 9 is installed on the metal washer.

The left and right ends of the pedal 2 are respectively provided with rubber pedal pads 16 .

An armrest frame 17 is provided on the support frame 15 .

The pump body 3 is a stainless steel cylinder structure.

A foot-operated siphon pumping method is as follows:

Step 1: Place the foot-operated siphon water pump on the implementation site, set up the armrest frame 17, and place one end of the water inlet main pipe 11 in the water source at a low water level; Before the pedal 2, add water to the upper pump chamber 5 of the pump body 3 to increase the sealing between the piston 4 and the inner wall of the pump body 3;

Step 2: Stand with both feet on the rubber foot pads 16 at the left and right ends; when stepping on the left foot, the piston 4 of the left pump body 3 moves from top to bottom; the one-way water stop valve 9 of the left pump body 3 is closed, and then As the piston 4 of the left pump body 3 moves downward, the volume of the lower pump chamber 6 of the left pump body 3 decreases gradually, so that the air pressure increases, and the one-way check valve 8 of the left pump body 3 automatically pops open, and the left pump body The air in the lower pump chamber 6 of 3 is discharged into the upper pump chamber 5;

At the same time, the piston 4 of the right pump body 3 moves upward, and the volume of the lower pump chamber 6 of the right pump body 3 gradually increases, reducing the air pressure and forming a vacuum, and the one-way water stop valve 9 of the right pump body 3 automatically moves upward. Pop open, the air in the water inlet pipe enters the lower pump chamber 6 of the right pump body 3, at this time the water inlet pipe and the lower pump chamber 6 are in a vacuum state, under the action of vacuum, the water in the lower part gradually moves upward through the water inlet pipe and Finally, it enters the lower pump chamber 6 of the right pump body 3. At this time, when the piston 4 of the right pump body 3 ends its stroke from bottom to top and changes from top to bottom, the water in the lower pump chamber 6 is flushed away. One-way check valve 8, and gradually enter the upper pump chamber 5 above the piston 4 of the right pump body 3, the water level in the upper pump chamber 5 is raised by the gradually rising piston 4, and passes through the upper pump chamber of the right pump body 3 The water outlet of 5 flows into the water outlet branch pipe 12;

Step 3: step on the pedals 2 alternately and continuously with both feet, so that the pistons 4 in the left and right pump bodies 3 alternately reciprocate and continuously run up and down, and continuously extract the vacuum in the lower pump chamber 6 of the corresponding pump body 3 until the lower pump body 3 Water flows into the water in the water outlet branch pipe 12 through the water outlets of the two pump bodies 3, and then flows out after being collected in the water outlet main pipe 13, thereby realizing the water pressure from the low place to the high place.

Compared with the prior art, the utility model has the following advantages and effects:

The utility model does not need electricity or oil, and uses manpower to pump water, and only relies on the weight of the person, and the feet step on the pedals alternately and continuously, so that the pistons in the left and right pump bodies reciprocate continuously up and down, and continuously extract the corresponding pump body. Lower the vacuum in the pump chamber until the water at the lower level flows into the water outlet branch pipe through the water outlets of the two pump bodies, and the water in the water outlet main pipe is unified and then flows out, thereby realizing the water pressure at the lower level to the higher level.

The operator stands on the left and right foot pedals, and by alternately stepping on the left and right feet, the air in the left and right pump chambers is continuously discharged to form a negative pressure. Enter the lower pump chamber at a high place, and gradually enter the upper pump chamber above the piston through the one-way check valve. When the piston ends its stroke from up to down and changes from bottom to up, the water level in the upper pump chamber is The gradually rising piston is lifted up, and flows into the water outlet branch pipe through the water outlet of the upper pump chamber; under the action of the operator stepping on the pedal alternately with both feet, the connecting rod drives the pistons of the two pumping mechanisms to reciprocate and continuously alternately run, The water flowing into the water outlet branch pipes respectively is collected in the water outlet main pipe and then flows out.

With the alternate stepping of both feet, negative pressure is alternately formed in the left and right pump chambers, realizing the alternate water discharge from the two pump chambers.

The utility model has the advantages of simple technical means, ingenious structure, simple manufacture, light weight, small size, and convenient carrying and assembling.

In summary, the utility model does not need to use electricity, and utilizes the weight of the operator's body to step on the left and right legs in turn to pump water. The device is used to solve the problem of difficult water intake caused by no electric drive in mountainous farmland or field work, and realizes the purpose of easy and efficient water pumping without electric energy.

It is especially suitable for field farmland irrigation, geological survey, engineering inspection and other operations, where it is difficult to obtain water.

Description of drawings

Fig. 1 is a schematic diagram of the structure of the pedal type siphon water pump of the present invention.

Fig. 2 is a partial structural schematic diagram of the pump body and the one-way check valve in Fig. 1 .

Fig. 3 is a partial structural schematic diagram of the connecting rod, the piston, and the one-way water stop valve in Fig. 1 .

Fig. 4 is a schematic diagram of the structural combination of the pump body, the one-way check valve, the connecting rod, the piston and the one-way water stop valve in Fig. 1 .

Fig. 5 is a block diagram 1 of the motion state of the foot-operated siphon water pump of the present invention.

Fig. 6 is the second block diagram of the motion state of the foot-operated siphon water pump of the present invention.

Fig. 7 is a demonstration diagram of an application example of the pedal type siphon water pump of the present invention.

detailed description

Below in conjunction with specific embodiment the utility model is described in further detail.

Example

As shown in Figures 1 to 7. The utility model discloses a foot-operated siphon pump, which comprises two left and right pumping mechanisms with the same structure, a support rod 1 installed between the two pumping mechanisms, and a foot pedal 2 movably arranged on the support rod 1; These two pumping mechanisms all include a pump body 3 with a cylindrical structure and a piston 4 placed in the pump body 3. The piston 4 divides the inner space of the pump body 3 into an upper pump chamber 5 and a lower pump chamber 6. Each piston 4 are respectively through a connecting rod 7, and are hinged at the end of the pedal 2 corresponding thereto;

Each piston 4 is provided with a one-way check valve 8, which automatically opens when the piston 4 moves downward, the volume of the lower pump chamber 6 gradually decreases, and automatically closes when the piston 4 moves upward, and the volume of the lower pump chamber 6 gradually increases;

There is a water inlet at the bottom of each pump body 3, and a one-way water stop valve 9 is installed at the water inlet. When the piston 4 goes down, it is automatically closed, and the water or air in the lower pump chamber 6 opens the one-way check valve 8 and Enter the upper pump chamber 5 above the piston 4; when the piston 4 goes up, the one-way water stop valve 9 automatically opens, the one-way check valve 8 closes, and gradually discharges the water or air entering the upper pump chamber 5 to the upper pump chamber other than 5;

After the water inlets of the two pump bodies 3 are interconnected through a water inlet branch pipe 10, they are connected to the water inlet main pipe 11; after the water outlets of the upper pump chamber 5 of the two pump bodies 3 are interconnected through a water outlet branch pipe 12, Connect the water outlet main pipe 13 again.

The middle part of the pedal 2 uses the support rod 1 as a fulcrum. When the left and right ends of the pedal 2 move up and down alternately, the connecting rod 7 drives each piston 4 to move up and down alternately in the corresponding pump body 3. That is, when the piston 4 of one of the pumping mechanisms goes down, the piston 4 of the other pumping mechanism goes up;

When the piston 4 moves from bottom to top, the one-way check valve 8 is closed, and the lower pump chamber 6 is in a vacuum state. Under the action of vacuum, the source water at the lower level gradually enters the lower pump chamber 6 through the one-way water stop valve 9 At this time, if the piston 4 ends its stroke from bottom to top and changes from top to bottom, the one-way check valve 8 will automatically open, and the one-way water stop valve 9 will automatically close. At this time, the volume of the lower pump chamber 6 gradually increases. shrinks, the volume of the upper pump chamber 5 gradually increases, and the water in the lower pump chamber 6 gradually enters the upper pump chamber 5 above the piston 4 through the one-way check valve 8. When changing from bottom to top, the water level in the upper pump chamber 5 is raised by the gradually rising piston 4, and flows into the water outlet branch pipe 12 through the water outlet of the upper pump chamber 5;

The pistons 4 of the two water pumping mechanisms reciprocate and continuously alternately operate in this way, so that the water that flows into the water outlet branch pipe 12 respectively is collected in the water outlet main pipe 13 and then flows out.

The water outlets of the upper pump chambers 5 of the two pump bodies 3 are respectively provided with downwardly inclined water outlet joints 14, and the two ends of the water outlet branch pipes 12 are respectively bridged between them; The water outlet forms a height difference; the interface between the water outlet main pipe 13 and the water outlet branch pipe 12 is lower than the water outlet.

The two pumping mechanisms are symmetrically fixed on a support frame 15; the support frame 15 is a lifting structure.

Described piston 4 is combined by bowl type rubber ring (rubber cup) and metal washer, and one-way water stop valve 9 is installed on the metal washer. The diameter of the metal washer is smaller than that of the bowl rubber ring. The bowl-shaped rubber ring has a hemispherical structure, and its outer edge naturally rolls up and shrinks when it goes down, reducing the gap and friction between the outer edge and the inner wall of the piston 4, allowing the air or water in the lower pump chamber to pass through the gap between the outer edge and the inner wall of the piston. The gap between them pours into the upper pump chamber; when going up, due to the negative pressure, its outer edge naturally stretches and increases the gap and friction with the inner wall of the piston 4.

The left and right ends of the pedal 2 are respectively provided with rubber foot pads 16 for anti-skid.

An armrest frame 17 is provided on the support frame 15 . Of course, the armrest frame 17 can also be provided separately from the support frame 15 . Bearings are installed at the end of the support rod 1, and the middle part of the pedal 2 is supported on the bearing to realize the left and right swing of the pedal 2.

The pump body 3 can adopt a stainless steel cylinder structure.

The pedal type siphon pumping method of the utility model can be realized through the following steps:

Step 1: Place the foot-operated siphon water pump on the place of implementation (such as a place where the farmland to be irrigated is relatively flat), set up the handrail frame 17, and place one end of the water inlet pipe 11 in the water source at a low place (sea, river, lakes, canals, ponds, etc.); in order to shorten the initial water filling time in the pump body 3, before stepping on the pedal 2 alternately, add water to the upper pump chamber 5 of the pump body 3 to increase the piston 4 and the inner wall of the pump body 3 tightness between

Step 2: Stand with both feet on the rubber foot pads 16 at the left and right ends; when stepping on the left foot, the piston 4 of the left pump body 3 moves from top to bottom; the one-way water stop valve 9 of the left pump body 3 is closed, and then As the piston 4 of the left pump body 3 moves downward, the volume of the lower pump chamber 6 of the left pump body 3 decreases gradually, so that the air pressure increases, and the one-way check valve 8 of the left pump body 3 automatically pops open, and the left pump body The air in the lower pump chamber 6 of 3 is discharged into the upper pump chamber 5;

At the same time, the piston 4 of the right pump body 3 moves upward, and the volume of the lower pump chamber 6 of the right pump body 3 gradually increases, reducing the air pressure and forming a vacuum, and the one-way water stop valve 9 of the right pump body 3 automatically moves upward. Pop open, the air in the water inlet pipe enters the lower pump chamber 6 of the right pump body 3, at this time the water inlet pipe and the lower pump chamber 6 are in a vacuum state, under the action of vacuum, the water in the lower part gradually moves upward through the water inlet pipe and Finally, it enters the lower pump chamber 6 of the right pump body 3. At this time, when the piston 4 of the right pump body 3 ends its stroke from bottom to top and changes from top to bottom, the water in the lower pump chamber 6 is flushed away. One-way check valve 8, and gradually enter the upper pump chamber 5 above the piston 4 of the right pump body 3, the water level in the upper pump chamber 5 is raised by the gradually rising piston 4, and passes through the upper pump chamber of the right pump body 3 The water outlet of 5 flows into the water outlet branch pipe 12;

Step 3: step on the pedals 2 alternately and continuously with both feet, so that the pistons 4 in the left and right pump bodies 3 alternately reciprocate and continuously run up and down, and continuously extract the vacuum in the lower pump chamber 6 of the corresponding pump body 3 until the lower pump body 3 Water flows into the water in the water outlet branch pipe 12 through the water outlets of the two pump bodies 3, and then flows out after being collected in the water outlet main pipe 13, thereby realizing the water pressure from the low place to the high place.

A mechanical analysis of one of the pump chambers 3 is performed below. At the beginning, the air pressure in the water inlet pipe (including the water inlet branch pipe 12 and the water inlet main pipe 13) is an atmospheric pressure P. At this time, one of the pistons is moved up by h1 through the transmission of the pedal 2, and the one-way water stop valve 9 is opened. The check valve 8 is closed. At this time, due to the upward movement of the piston, the gas volume in the lower pump chamber increases to V1, and the pressure decreases to P1. Under the action of the internal and external pressure difference, the water rises to a height of h2. Let the original gas volume in the lower pump chamber be V , the inner diameter of the lower pump is d, and the inner diameter of the water inlet pipe is d ₀ ;

From the ideal gas state equation: PV=P ₁ V ₁

Geometric relationship:

Equilibrium condition: P=P ₁ +ρgh ₂

From the above three equations, the relationship equation between h ₁ and h ₂ can be solved, namely It can be seen that h ₁ is proportional to h ₂ , when h ₁ is the largest, h ₂ is also the largest;

When the piston descends, the one-way water stop valve 9 is closed, and the one-way check valve 8 is opened to exhaust gas until the piston reaches the bottom of the lower pump chamber; at this time, the pressure in the water inlet pipe remains P1 _; and at this time, the gas volume of the lower pump chamber V ₂ is only the volume of the inlet pipe minus the volume of the rising water column (or water level), that is

${\mathrm{<span\; class="notranslate">\; V</span>}}_{\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; =</span>\mathrm{<span\; class="notranslate">\; V</span>}<span\; class="notranslate">\; -</span>\frac{{\mathrm{<span\; class="notranslate">\; \&pi;d</span>}}^{\mathrm{<span\; class="notranslate">\; 2</span>}}}{\mathrm{<span\; class="notranslate">\; 4</span>}}<span\; class="notranslate">\; *</span>{\mathrm{<span\; class="notranslate">\; h</span>}}_{\mathrm{<span\; class="notranslate">\; 1</span>}}$

The piston rises again, the gas volume increases, the pressure further decreases, and the water level in the water inlet pipe further increases. Such a reciprocating cycle eventually fills the water inlet pipe and the pump chamber with water. As the piston rises, a vacuum is created, at which point the pressure difference is at its maximum. The larger the volume formed by the piston and the bottom of the lower pump chamber, the larger the vacuum volume generated and the more water will be pumped up.

Pulling up the piston only needs to overcome the weight of the water on the upper part of the piston and the friction generated between the piston and the wall of the pump body, so the applied external force is not very large

As mentioned above, the utility model can be better realized. The pressure of atmospheric pressure is 9.8m, and the theoretical pumping (lifting water) height is 9.8m. Due to the certain resistance loss of the equipment structure, the actual head is slightly less than 9.8m. The utility model adopts a foot-operated water pump, and the water can be lifted by nearly 9.8m only by the weight of the human body.

If the height difference between the height of the implementation site and the low-level water source is greater than 9.8m, it can be realized in a relay mode through a plurality of pedal-operated siphon water pumps of the present invention.

The implementation of the present utility model is not limited by the above-mentioned examples, and any other changes, modifications, substitutions, combinations, and simplifications that do not deviate from the spirit and principles of the present utility model should be equivalent replacement methods. Included within the protection scope of the present utility model.

Claims (9)

1. A foot-operated siphon water pump is characterized in that: it comprises two pumping mechanisms with the same structure, a support rod (1) installed between the two pumping mechanisms, and a support rod (1) that is movably arranged on the support rod (1). Pedal (2); these two pumping mechanisms all comprise the pump body (3) of a cylinder structure and the piston (4) that places in the pump body (3), and this piston (4) pushes the pump body (3) The internal space of the pump is divided into an upper pump chamber (5) and a lower pump chamber (6), and each piston (4) is movable and hinged at the end of the corresponding pedal (2) through a connecting rod (7). ; Each piston (4) is provided with a one-way check valve (8), which automatically opens when the piston (4) goes down, and the volume of the lower pump chamber (6) gradually decreases; when it goes up, it automatically closes, and the lower pump chamber ( 6) The volume gradually increases; There is a water inlet at the bottom of each pump body (3), and a one-way water stop valve (9) is installed at the water inlet. When the piston (4) goes down, it is automatically closed, and the water or air in the lower pump chamber (6) flushes Open the one-way check valve (8) and enter the upper pump chamber (5) above the piston (4); when the piston (4) goes up, the one-way water stop valve (9) is automatically opened, and the one-way check valve (8) ) is closed, and the water or air entering the upper pump chamber (5) is gradually discharged to the outside of the upper pump chamber (5); The water inlets of the two pump bodies (3) are interconnected through a water inlet branch pipe (10), and then connected to the water inlet main pipe (11); the water outlets of the upper pump chambers (5) of the two pump bodies (3) After being interconnected by a water outlet branch pipe (12), connect the water outlet main pipe (13) again. 2. The foot-operated siphon water pump according to claim 1, characterized in that: the middle part of the pedal (2) uses the support rod (1) as a fulcrum, when the left and right ends of the pedal (2) move up and down During the alternate movement, the connecting rod (7) drives each piston (4) to move up and down alternately in the corresponding pump body (3), that is, when the piston (4) of one pumping mechanism goes down, the other pumping mechanism The piston (4) goes up; When the piston (4) moves from bottom to top, the one-way check valve (8) is closed, and the lower pump chamber (6) is in a vacuum state. ) gradually enters the lower pump chamber (6). At this time, if the piston (4) ends its stroke from bottom to top and changes from top to bottom, the one-way check valve (8) will automatically open, and the one-way check valve will The water valve (9) closes automatically. At this time, the volume of the lower pump chamber (6) gradually decreases, and the volume of the upper pump chamber (5) gradually increases. The water in the lower pump chamber (6) passes through the one-way check valve (8). Gradually enter the upper pump chamber (5) above the piston (4), when the piston (4) ends its stroke from top to bottom and moves from bottom to top, the water level in the upper pump chamber (5) is gradually The rising piston (4) lifts up and flows into the water outlet branch pipe (12) through the water outlet of the upper pump chamber (5); The pistons (4) of the two water pumping mechanisms reciprocate and operate alternately continuously so that the water that flows into the water outlet branch pipes (12) respectively flows out after being unified in the water outlet main pipe (13). 3. The foot-operated siphon water pump according to claim 1 is characterized in that: when the foot-operated siphon water pump is in the initial state, the air pressure in the water inlet branch pipe and the water inlet main pipe is an atmospheric pressure P. (2) The transmission makes one of the pistons move up by h1, the one-way water stop valve (9) is opened, and the one-way check valve (8) is closed. At this time, due to the upward movement of the piston, the gas volume of the lower pump chamber (6) increases to V1, the pressure is reduced to P1, under the action of the internal and external pressure difference, the water rises to a height of h2, the gas volume in the original lower pump chamber (6) is V, the inner diameter of the lower pump chamber (6) is d, the water inlet branch pipe and the water inlet The inner diameter of the main pipe is d ₀ ; From the ideal gas state equation: PV=P ₁ V ₁ Geometric relationship: Equilibrium condition: P=P ₁ +ρgh ₂ From these three equations, the relationship equation between h ₁ and h ₂ can be solved, namely It can be seen that h ₁ is proportional to h ₂ , when h ₁ is the largest, h ₂ is also the largest; When the piston descends, the one-way water stop valve (9) is closed, and the one-way check valve (8) is opened to exhaust gas until the piston reaches the bottom of the lower pump chamber (6); Keep it as P1 _; and at this time, the gas volume V2 of the lower pump chamber ( ₆ ) is only the volume of the water inlet branch pipe and the water inlet main pipe minus the volume of the rising water column. ${\mathrm{<span\; class="notranslate">\; V</span>}}_{\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; =</span>\mathrm{<span\; class="notranslate">\; V</span>}<span\; class="notranslate">\; -</span>\frac{{\mathrm{<span\; class="notranslate">\; \&pi;d</span>}}^{\mathrm{<span\; class="notranslate">\; 2</span>}}}{\mathrm{<span\; class="notranslate">\; 4</span>}}<span\; class="notranslate">\; *</span>{\mathrm{<span\; class="notranslate">\; h</span>}}_{\mathrm{<span\; class="notranslate">\; 1</span>}}<span\; class="notranslate">\; .</span>$ 4. The foot-operated siphon water pump according to claim 1, characterized in that: the water outlets of the upper pump chambers (5) of the two pump bodies (3) are respectively provided with downwardly inclined water outlet joints (14), and the water outlet branch pipes The two ends of (12) are bridged between them respectively; The outlet joint (14) inclined downwards makes the water outlet branch pipe (12) whole and the water outlet form a height difference; The water outlet main pipe (13) and the water outlet branch pipe (12) The interface position is lower than the water outlet. 5. The foot-operated siphon water pump according to claim 1, characterized in that: the two pumping mechanisms are symmetrically fixed on a supporting frame (15) of a lifting structure. 6. The foot-operated siphon water pump according to any one of claims 1 to 5, characterized in that: the piston (4) is composed of a bowl-type rubber ring and a metal washer, and the one-way water stop valve (9 ) is installed on the metal washer. 7. The foot-operated siphon water pump according to claim 6, characterized in that: the left and right ends of the foot pedal (2) are respectively provided with rubber foot pads (16). 8. The foot-operated siphon water pump according to claim 6, characterized in that: the support frame (15) is provided with an armrest frame (17). 9. The foot-operated siphon water pump according to claim 6, characterized in that: the pump body (3) is a stainless steel cylinder structure.