CN213478641U - Plunger pump structure - Google Patents

Abstract

The utility model provides a plunger pump structure belongs to agricultural apparatus technical field. It has solved the high problem of current plunger pump structure energy consumption. This plunger pump structure, including the pump body and the pump head of setting on the pump body, water inlet and delivery port have on the pump head, it is equipped with the plunger to have plunger chamber and plunger intracavity on the pump head, the middle part in plunger chamber has and is the tube-shape and with plunger matched with sliding part, the plunger setting just can be in sliding part reciprocating slide, the both ends in plunger chamber all are provided with inlet opening and apopore, and all inlet openings all are linked together with the water inlet, all apopores all are linked together with the delivery port, inlet opening and delivery port department are equipped with into water check valve and play water check valve respectively. One reciprocating motion of the plunger realizes two times of water absorption and two times of water pressing, the frequency of the water absorption and the water pressing is higher, and the efficiency of the water absorption and the water pressing is improved by nearly one time, so that the required power of the motor is smaller and the energy consumption is smaller while the working efficiency is ensured.

Description

Plunger pump structure

Technical Field

The utility model belongs to the technical field of agricultural apparatus, a plunger pump structure is related to.

Background

In the agricultural planting process, the crops are sprayed with pesticides at intervals for preventing and treating plant diseases and insect pests and regulating the growth of the plants. The current medicine in-process that spouts generally adopts the medicine machine of spouting to spray the pesticide, and the current medicine machine of spouting all includes that spout medicine pump, hose and drive spout the motor of medicine pump work, spouts the medicine pump and generally is the plunger pump, and the plunger pole round trip movement that the motor passes through cam structure drive plunger pump will be with the liquid medicine suction pump again.

The existing plunger pump structure comprises a pump body and a pump head, a plunger cavity is formed in the pump head, a plunger is arranged in the plunger cavity in a sliding mode, a cam structure is arranged in the pump body and connected with a plunger rod, the plunger rod extends into the plunger cavity and is connected with the plunger, the plunger is driven to reciprocate through the cam structure to achieve water suction and water discharge, the plunger is driven to pull backwards to achieve water suction, and the plunger is pushed forwards to achieve water extrusion. The existing conventional plunger pumps are all of single-plunger pump structures, and water absorption and water pressing quantity are small, so that the flow of spraying the medicine is small, and the working efficiency is low.

Therefore, the chinese patent application (201820010651.2) discloses a four-cylinder plunger pump, which comprises a pump body, a pump head fixedly connected with one side of the pump body, wherein the pump head is provided with a water inlet and a water outlet, the water outlet is positioned above the water inlet, the pump body is provided with a pump cavity, the side wall of the pump head contacting with the pump body is provided with four first through holes in a penetrating manner, the first through holes are internally provided with first sealing rings, the pump cavity is internally provided with four plunger rods which do reciprocating motion along the axial direction of the pump cavity, the four plunger rods all penetrate through the first through holes and are communicated with the pump head, the pump head comprises a base, a control seat arranged above the base and a water inlet seat arranged on one side of the base far away from the pump body, the water inlet; the side wall of the base, which is in contact with the water inlet seat, is provided with a second through hole opposite to the first through hole, the side wall of the base, which is in contact with the control seat, is provided with a third through hole, and the second through hole and the third through hole are internally provided with one-way valves.

Although the plunger pump structure is provided with the four plunger rods, when the plunger pump structure works, the motor drives the cam to rotate and drives the four plunger rods to reciprocate together, so that water suction and water drainage are realized once each time, the water suction and water pressing quantity is increased, the working efficiency is improved, but relatively, the required motor power is higher, and the energy consumption is high.

In order to reduce energy consumption, the conventional method is as follows: the energy consumption of the intermediate transmission system is reduced by adopting a more energy-saving driving motor or improving the precision of each part, but the corresponding required cost is higher.

Disclosure of Invention

The utility model aims at having the above-mentioned problem to current technique, provided a plunger pump structure, the utility model aims to solve the technical problem that: the problem of high energy consumption of the existing plunger pump structure.

The purpose of the utility model can be realized by the following technical proposal: the utility model provides a plunger pump structure, includes the pump body and sets up the pump head on the pump body, water inlet and delivery port have on the pump head, it is equipped with the plunger to have plunger chamber and plunger intracavity on the pump head, a serial communication port, the middle part in plunger chamber have be the tube-shape and with plunger matched with sliding part, the plunger sets up in the sliding part and can be in the reciprocating sliding of sliding part, the both ends in plunger chamber all are provided with inlet opening and apopore, and all inlet openings all with the water inlet is linked together, all apopores all with the delivery port is linked together, inlet opening and delivery port department are equipped with the check valve of intaking and the check valve of a water outlet respectively.

In the conventional cognition in the field, a plunger cavity of a plunger pump is provided with a water inlet hole and a water outlet hole, the volume is changed through the reciprocating motion of a plunger rod in the plunger cavity to realize water suction and water pressing, namely the plunger rod is pulled backwards, the volume of the plunger cavity is increased to generate negative pressure to suck water from the water inlet hole, the plunger rod is pushed forwards, the volume of the plunger cavity is reduced, and the water in the plunger cavity is pressed out from the water outlet hole, namely the conventional plunger pump, and one reciprocating motion of the plunger rod realizes one-time water suction and one-time water pressing.

And this plunger pump structure has overturned the conventional cognition to the plunger pump, all sets up two inlet openings and two apopores on every plunger chamber, and the plunger separates the plunger chamber that corresponds for two mutually independent cavities, and two inlet openings and two apopores correspond the intercommunication with two cavities of separating formation respectively, and equally divide on every inlet opening and the apopore and respectively correspond and set up into water check valve and play water check valve. When the plunger is pulled backwards, the volume of the cavity in front of the plunger cavity is increased to generate negative pressure, the liquid medicine is sucked from the water inlet hole of the cavity, the volume of the cavity behind the plunger cavity is decreased, and the liquid medicine in the cavity is pressed out from the corresponding water outlet hole; when the plunger is pushed forwards, the volume of the front cavity is reduced, the liquid medicine in the cavity is pressed out from the corresponding water outlet hole, the volume of the rear cavity is increased to generate negative pressure, and the liquid medicine is sucked from the water inlet hole of the cavity. That is to say, this plunger pump structure, all realized once absorbing water and once pressurized-water at the in-process that the plunger pushed forward or pulled backward, two times of absorbing water and twice pressurized-water have been realized to a reciprocating motion of plunger in other words, compare with current conventional plunger pump, the frequency of absorbing water and pressurized-water is higher, be equivalent to under the energy consumption of same motor power, the efficiency of absorbing water and pressurized-water has improved nearly one time, for example under the prerequisite of same absorption water and pressurized-water volume, this plunger pump structure only needs two plunger subassemblies just can realize that four plunger subassemblies mentioned in the background art can realize, consequently, when guaranteeing work efficiency, the power of required motor is littleer, the energy consumption is also littleer. The plunger assembly of the plunger pump structure can be one or more selected according to actual requirements.

In the plunger pump structure, the two water inlet holes respectively positioned at the two ends of the plunger cavity are symmetrically arranged at the two sides of the sliding part, and the two water outlet holes are symmetrically arranged at the two sides of the sliding part. Through foretell setting for the plunger can not form to shelter from inlet opening or apopore at the slip in-process, has further improved the efficiency of absorbing water and pressurized-water, thereby required energy consumption is littleer.

In foretell plunger pump structure, the intake antrum has still been seted up on the pump head, the water inlet set up on the lateral wall of intake antrum and with the intake antrum intercommunication, the intake antrum is located one side in plunger chamber, two inlet openings that are located plunger chamber both ends all with the intake antrum is linked together, the play water cavity has still been seted up on the pump head, the delivery port is seted up on the lateral wall in play water cavity and is linked together with a water cavity, it is located to go out the water cavity the opposite side in plunger chamber, two apopores that are located plunger chamber both ends all with the intake antrum is linked together. The arrangement that the water inlet cavity and the water outlet cavity are positioned on two sides of the plunger cavity makes the whole layout more reasonable. Simultaneously also make two inlet openings and two apopores at plunger chamber both ends all seal and intake through same inlet chamber and go out water with same play water cavity, thereby make the frequency and the income of intaking and going out water at plunger chamber both ends, the water yield can keep roughly unanimous, thereby make at every turn from delivery port spun liquid medicine comparatively even, thereby can the at utmost rational utilization power of motor, avoided doing useless work as far as possible, when guaranteeing work efficiency, the power of required motor is littleer, the energy consumption is also littleer. Preferably, the water inlet cavity is positioned below the plunger cavity, and the water outlet cavity is positioned above the plunger cavity.

In foretell plunger pump structure, the pump head includes casing, well casing and casing down, the plunger chamber sets up on well casing just well casing with the pump body is connected, go up the casing and fix the upper and lower both sides at well casing respectively with lower casing, the intake antrum is seted up on the casing down, it sets up to go out the water cavity on the casing. Through the setting, make the processing of pump head more simple and convenient, the intake antrum is located the below simultaneously, goes out the water cavity and is located the top, can the change of rational utilization gravity and plunger intracavity pressure for when intaking, go out the check valve of water and can be fine keep off state, when going out water, the check valve of intaking can be fine keep off state.

In the plunger pump structure, the water inlet one-way valve comprises a first valve element and a first cylindrical valve body, the upper end of the first valve body penetrates through the water inlet hole and extends into the corresponding plunger cavity, a first liquid outlet is formed in the end of the first valve body, a first annular flange protruding outwards is arranged at the lower end of the first valve body, the first annular flange is tightly pressed and fixed between the middle shell and the lower shell, a first liquid inlet is formed at the lower end of the first valve body and communicated with the water inlet cavity, the first valve element is arranged in the first valve body in a sliding mode, a first elastic part is further arranged between the first valve body and the first valve element, and the first valve element always has the tendency of moving downwards to seal the first liquid inlet under the action of the first elastic part. Through foretell setting for the check valve that intakes is all spacing in level and vertical direction, can not take place the skew, and is sealed effectual. When the plunger slides, the volume of one chamber is increased, negative pressure is generated in the chamber, the first valve core moves upwards to open the first liquid inlet against the elastic force of the first elastic part, and water is sucked into the chamber. The volume of the other cavity is reduced, and the first valve core abuts against one edge of the liquid inlet to seal the first liquid inlet under the action of the self gravity, the elastic force of the elastic piece and the pressure of water in the cavity.

In the plunger pump structure, a first water passing hole communicated with the water inlet cavity is formed in the lower shell, the first water passing hole is a stepped hole, the first annular flanging is embedded into the first water passing hole and abuts against the stepped surface of the first water passing hole, a first convex annular edge is arranged on the edge of the middle shell, which is located at the water inlet hole, and the first convex annular edge extends into the first water passing hole and is tightly pressed on the first annular flanging. Through foretell setting for the installation of the check valve that intakes is fixed more convenient, also be equivalent to simultaneously with well casing, down casing and the junction setting between the check valve three of intaking in the water hole one, sealed effect is relatively better.

In the plunger pump structure, the water outlet one-way valve comprises a valve core II and a cylindrical valve body II, the upper end of the valve body II extends into the water outlet cavity, the end of the valve body II is provided with a liquid outlet II, the lower end of the valve body II is provided with an annular flange II protruding outwards, the annular flange II is tightly pressed and fixed between the middle shell and the upper shell, the lower end of the valve body II is provided with a liquid inlet II, the liquid inlet II is communicated with the water inlet hole, the valve core II is arranged in the valve body II in a sliding mode, an elastic part II is further arranged between the valve body II and the valve core II, and the valve core II always has the tendency of moving downwards to seal the liquid inlet II under the action of the elastic part II. Through foretell setting, make and obtain water check valve all by spacingly in level and vertical direction, can not take place the skew, sealed effectual. When the plunger slides, the volume of one cavity is increased, negative pressure is generated in the cavity, the valve core II is abutted against the edges of the liquid inlet II under the action of self gravity, the elastic force of the elastic piece II and the suction force of the negative pressure to seal the liquid inlet II, the cavity absorbs water through the water inlet one-way valve, and meanwhile, the water outlet one-way valve can prevent liquid medicine in the water outlet cavity from flowing back into the cavity. When the volume of the other cavity is reduced, the second valve core overcomes the elastic force of the second elastic part to move upwards to open the second liquid inlet, and water is pressed into the water outlet cavity.

In the plunger pump structure, the water outlet hole is a stepped hole, the second annular flanging is embedded into the water outlet hole and is abutted against the step surface of the water outlet hole, the upper shell is provided with a second water passing hole, the upper end of the second valve body penetrates through the second water passing hole and extends into the water outlet cavity, the edge of the second water passing hole is provided with a second annular convex edge protruding downwards, and the second annular convex edge extends into the water outlet hole and is tightly pressed on the second annular flanging. Through foretell setting, it is more convenient to make the installation of play water check valve fixed, also is equivalent to simultaneously with well casing, go up the casing and go out the junction setting between the water check valve three in the outlet port, sealed effect is relatively better.

In foretell plunger pump structure, it still is equipped with sealing washer one in the water hole one to cross, annular caulking groove one has on the internal perisporium of sealing washer one, embedding of annular turn-ups one in the annular caulking groove one, the both ends face of sealing washer one is sealed respectively to lean on the annular protruding along one with cross the step face in water hole one, still be equipped with sealing washer two in the outlet port, annular caulking groove two has on the internal perisporium of sealing washer two, embedding of annular turn-ups two in the annular caulking groove two, the both ends face of sealing washer two is sealed respectively to lean on the step face of annular protruding along two and apopore. Through the design of the first sealing ring and the second sealing ring, the upper shell, the middle shell and the water outlet one-way valve and the middle shell, the lower shell and the water inlet one-way valve are sealed in all directions, the joints of the upper shell, the middle shell and the water inlet one-way valve cannot leak, and therefore smooth water absorption and water pressing are guaranteed.

In the plunger pump structure, the upper side and the lower side of the middle shell are both provided with weight reducing grooves, the weight reducing grooves are internally provided with convex positioning columns, the upper shell and the lower shell are both provided with positioning sleeves, and the positioning columns can penetrate into the positioning sleeves and are fixed through fasteners. The lightweight of whole plunger pump structure has been realized to the design that subtracts the heavy groove, and the cooperation design of reference column and position sleeve makes the installation between last casing, well casing and the lower casing three fixed more convenient, and the design of convex reference column has increased the wall thickness here in addition in other words for it is more convenient to process the trompil, is convenient for realize connecting through the fastener.

In the plunger pump structure, the sliding part is provided with a sliding sleeve, and the plunger is positioned in the sliding sleeve and can slide in the sliding sleeve in a reciprocating manner. And the abrasion is reduced due to the arrangement of the sliding sleeve.

In the plunger pump structure, the water inlet hole is provided with a flaring-shaped guide part, and a large port of the guide part is communicated with the corresponding plunger cavity. Through the design of flaring form guide part, can reduce the velocity of flow from the liquid medicine that the intake antrum got into, prevent that liquid medicine from assaulting the inner wall in plunger chamber and leading to inside undulant, also make simultaneously liquid medicine get into each portion of flow direction plunger chamber that can be even after, avoid causing the local reduction of negative pressure of intake antrum in the gathering of intake antrum, guarantee the smoothness nature of absorbing water, reduced the consume of energy.

Compared with the prior art, the plunger pump structure has the following advantages: this plunger pump structure, the in-process that pushes forward or pull backward at the plunger has all realized once absorbing water and once pressurized-water, a reciprocating motion has realized twice absorbing water and twice pressurized-water equivalent to the plunger, compare in current conventional plunger pump, the frequency of absorbing water and pressurized-water is higher, under the energy consumption of same motor power, the efficiency of absorbing water and pressurized-water has improved nearly one time, consequently, when guaranteeing work efficiency, the power of required motor is littleer, the energy consumption is also littleer.

Drawings

Fig. 1 is a perspective view of the structure of the plunger pump.

Fig. 2 is a top view of the present plunger pump structure.

Fig. 3 is a sectional view taken in the direction of a-a in fig. 2.

Fig. 4 is an enlarged view at C in fig. 3.

Fig. 5 is a side view of the present plunger pump structure.

Fig. 6 is a sectional view taken in the direction B-B in fig. 5.

Fig. 7 is a first perspective view of the middle housing.

Fig. 8 is a second perspective view of the middle housing.

Fig. 9 is a perspective view of the upper case.

Fig. 10 is a perspective view of the lower case.

In the figure, 1, a pump body; 2. a pump head; 2a, an upper shell; 2a1, a water outlet; 2a2, water outlet cavity; 2a3 and a water passing hole II; 2a4, annular flange two; 2b, a middle shell; 2b1, plunger cavity; 2b1a, chamber; 2b1b, sliding part; 2b2, a water inlet hole; 2b3, water outlet; 2b4, annular ledge one; 2b5, weight-reduction grooves; 2b6, locating posts; 2c, a lower shell; 2c1, water inlet; 2c2, a water inlet cavity; 2c3, a first water through hole; 3. a plunger; 4. a plunger rod; 5. a water inlet one-way valve; 5a, a valve body I; 5a1, and a first annular flange; 5b, a valve core I; 5c, a first elastic piece; 6. a water outlet one-way valve; 6a and a second valve body; 6a1 and a second annular flange; 6b, a valve core II; 6c, an elastic piece II; 7. a first sealing ring; 8. a second sealing ring; 9. a positioning sleeve; 10. and (4) a sliding sleeve.

Detailed Description

The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

As shown in fig. 1-10, the plunger pump structure includes a pump body 1 and a pump head 2 disposed on the pump body 1, the pump head 2 has a water inlet 2c1 and a water outlet 2a1, the water inlet 2c1 is used for connecting a water storage device, the water outlet 2a1 is used for connecting a medicine spraying pipe, the pump head 2 has at least one plunger cavity 2b1, and in this embodiment, the pump head 2 has three plunger cavities 2b 1.

Specifically, as shown in fig. 3, each plunger chamber 2b1 is provided at both ends with an inlet hole 2b2 and an outlet hole 2b 3. Each plunger cavity 2b1 is internally provided with a plunger 3, the middle part of the plunger cavity 2b1 is provided with a cylindrical sliding part 2b1b matched with the plunger 3, a sliding sleeve 10 is arranged in the sliding part 2b1b, the outer wall of the sliding sleeve 10 and the inner wall of the sliding part 2b1b are sealed by a sealing ring, and the plunger 3 is positioned in the sliding sleeve 10 and can slide in the sliding sleeve 10 in a reciprocating manner. The plunger 3 divides the corresponding plunger cavity 2b1 into two mutually independent chambers 2b1a, the two water inlets 2b2 are respectively communicated with the corresponding two chambers 2b1a, the two water inlets 2b2 are both communicated with the water inlet 2c1, the two water outlets 2b3 are respectively communicated with the corresponding two chambers 2b1a, the two water outlets 2b3 are both communicated with the water outlet 2a1, and the water inlet 2b2 and the water outlet 2b3 are respectively provided with a water inlet check valve 5 and a water outlet check valve 6.

Further, the pump head 2 includes an upper housing 2a, a middle housing 2b and a lower housing 2c, the plunger cavity 2b1 is disposed on the middle housing 2b and the middle housing 2b is connected with the pump body 1, a cam structure is disposed in the pump body 1, each plunger 3 is connected with a plunger rod 4, one end of the plunger rod 4 penetrates into the pump body 1 and is connected with the cam structure, and the cam structure can drive the plunger rod 4 to reciprocate. Go up casing 2a and lower casing 2c and be located the upper and lower both sides of well casing 2b respectively, subtract heavy groove 2b5 has all been seted up to the upper and lower both sides of well casing 2b, subtracts to have convex reference column 2b6 in the groove 2b5, all has the position sleeve 9 on going up casing 2a and the lower casing 2c, and reference column 2b6 can penetrate in the position sleeve 9 and fixed through the fastener. The lower shell 2c is provided with a water inlet cavity 2c2, the water inlet 2c1 is arranged on the side wall of the water inlet cavity 2c2 and communicated with the water inlet cavity 2c2, and the two cavities 2b1a are respectively communicated with the water inlet cavity 2c2 through corresponding water inlet holes 2b 2. The lower shell 2c is provided with a water outlet cavity 2a2, the water outlet 2a1 is provided on the side wall of the water outlet cavity 2a2 and is communicated with the water outlet cavity 2a2, and the two chambers 2b1a are respectively communicated with the water inlet cavity 2c2 through the corresponding water outlet holes 2b 3.

The water inlet check valve 5 comprises a valve core I5 b and a cylindrical valve body I5 a, the upper end of the valve body I5 a penetrates through the water inlet hole 2b2 to extend into the corresponding cavity 2b1a, a liquid outlet I is formed in the end of the valve body I5 a, the water inlet hole 2b2 is provided with a flaring-shaped guide portion, the large port of the guide portion is communicated with the corresponding cavity 2b1a, and the inner diameter of the small port of the guide portion is larger than the outer diameter of the valve body I5 a. In this embodiment, the first liquid outlet is formed on the upper end surface of the first valve body 5a and the circumferential side wall of the first valve body 5 a. The lower shell 2c is provided with a water passing hole I2 c3 communicated with the water inlet cavity 2c2, the water passing hole I2 c3 is a stepped hole, the lower end of the valve body I5 a is provided with an annular flanging I5 a1 protruding outwards, a sealing ring I7 is further arranged in the water passing hole I2 c3, the inner peripheral wall of the sealing ring I7 is provided with an annular embedding groove I, the annular flanging I5 a1 is embedded into the annular embedding groove I, the edge of the middle shell 2b, which is positioned at the water inlet hole 2b2, is provided with a protruding annular convex edge I2 b4, the annular convex edge I2 b4 extends into the water passing hole I2 c3 and is pressed on the sealing ring I7, and two end faces of the sealing ring I7 are respectively and tightly abutted against the stepped faces of the annular convex edge I2 b4 and the water passing hole I2 c3 to form sealing. The lower end of the first valve body 5a is provided with a first liquid inlet, the first liquid inlet is communicated with the first water through hole 2c3, the first valve core 5b is arranged in the first valve body 5a in a sliding mode, an elastic piece 5c is further arranged between the first valve body 5a and the first valve core 5b, and the first valve core 5b always has the tendency of moving downwards to seal the first liquid inlet under the action of the elastic piece 5 c.

The water outlet one-way valve 6 comprises a valve core II 6b and a cylindrical valve body II 6a, the upper shell 2a is provided with a water through hole II 2a3, the upper end of the valve body II 6a penetrates through the water through hole II 2a3 and extends into the water outlet cavity 2a2, and the end is provided with a liquid outlet II. In this embodiment, the upper end surface of the second valve body 6a and the circumferential side wall of the second valve body 6a are both provided with a second liquid outlet. The water outlet hole 2b3 is a stepped hole, the lower end of the valve body II 6a is provided with an annular flange II 6a1 protruding outwards, a sealing ring II 8 is further arranged in the water outlet hole 2b3, the inner peripheral wall of the sealing ring II 8 is provided with an annular embedding groove II, the annular flange II 6a1 is embedded into the annular embedding groove II, the edge of the water passing hole II 2a3 is provided with an annular convex edge II 2a4 protruding downwards, the annular convex edge II 2a4 extends into the water outlet hole 2b3 and is pressed on the sealing ring II 8, and two end faces of the sealing ring II 8 abut against the step faces of the annular convex edge II 2a4 and the water outlet hole 2b3 respectively to form sealing. The lower end of the second valve body 6a is provided with a second liquid inlet, the second liquid inlet is communicated with the water inlet hole 2b2, the second valve core 6b is arranged in the second valve body 6a in a sliding mode, an elastic piece 6c is further arranged between the second valve body 6a and the second valve core 6b, and the second valve core 6b always has the tendency of moving downwards to seal the second liquid inlet under the action of the elastic piece 6 c. In this embodiment, the first elastic member 5c and the second elastic member 6c are both springs.

The working principle of the plunger 3 pump is as follows: when the plunger rod 4 drives the plunger 3 to pull backwards, the volume of the front cavity 2b1a is increased to generate negative pressure, the valve core I5 b corresponding to the cavity 2b1a overcomes the elastic force of the elastic piece I5 c to move upwards to open the liquid inlet I, the valve core II 6b is tightly propped against the edge of the liquid inlet II to seal the liquid inlet II under the action of the self gravity, the elastic force of the elastic piece II 6c and the suction force of the negative pressure, and the cavity 2b1a sucks water from the water inlet cavity 2c 2; meanwhile, the volume of the rear chamber 2b1a is reduced, the valve core one 5b corresponding to the chamber 2b1a abuts against one edge of the liquid inlet to close the liquid inlet under the action of the self gravity, the elastic force of the elastic piece one 5c and the pressure of water in the chamber 2b1a, the valve core two 6b overcomes the elastic force of the elastic piece two 6c to move upwards to open the liquid inlet two, and therefore liquid medicine in the chamber 2b1a is pressed into the water outlet cavity 2a 2. When the plunger rod 4 drives the plunger 3 to push forwards, the first valve core 5b corresponding to the front cavity 2b1a and the cavity 2b1a is tightly propped against one edge of the liquid inlet to close the liquid inlet under the action of the self gravity, the elastic force of the elastic piece 5c and the pressure of water in the cavity 2b1a, and the second valve core 6b overcomes the elastic force of the elastic piece 6c to move upwards to open the second liquid inlet, so that the liquid medicine in the cavity 2b1a is pressed into the water outlet cavity 2a 2; meanwhile, the volume of the rear chamber 2b1a is increased to generate negative pressure, the valve core one 5b corresponding to the chamber 2b1a overcomes the elastic force of the elastic piece one 5c to move upwards to open the first liquid inlet, the valve core two 6b is abutted against the edge of the second liquid inlet to close the second liquid inlet under the action of the self gravity, the elastic force of the elastic piece two 6c and the suction force of the negative pressure, and the chamber 2b1a sucks water from the water inlet cavity 2c 2.

This plunger pump structure has overturned the conventional cognition to 3 pumps of plunger, the in-process of pushing forward or pulling backward at 3 plungers has all realized once absorbing water and once pressurized-water, 3 reciprocating motion in the same place plunger has realized twice absorbing water and twice pressurized-water, compare with current conventional 3 pumps of plunger, the frequency of absorbing water and pressurized-water is higher, under the energy consumption of same motor power, the efficiency of absorbing water and pressurized-water has improved nearly one time, therefore, when guaranteeing work efficiency, the power of required motor is littleer, the energy consumption is also littleer.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Although the pump body 1, the pump head 2, the upper housing 2a, the water outlet 2a1, the water outlet cavity 2a2, the water through hole two 2a3, the annular flange two 2a4, the middle housing 2b, the plunger cavity 2b1, the chamber 2b1a, the sliding portion 2b1b, the water inlet hole 2b2, the water outlet hole 2b3, the annular flange one 2b4, the weight reduction groove 2b5, the positioning post 2b6, the lower housing 2c, the water inlet 2c1, the water inlet cavity 2c2, the water through hole one 2c3, the plunger 3, the plunger rod 4, the water inlet check valve 5, the valve body one 5a, the annular flange one 5a, the elastic member one 5c, the water outlet check valve 6, the valve body two 6a, the annular flange two 6a1, the valve core two 6b, the elastic member two 6c, the sealing ring one 7, the second sealing ring 8, the positioning sleeve 9, the sliding sleeve 10, and the like are more used herein, other terms are not excluded. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed in a manner that is inconsistent with the spirit of the invention.

Claims (10)

1. A plunger pump structure comprises a pump body (1) and a pump head (2) arranged on the pump body (1), wherein a water inlet (2c1) and a water outlet (2a1) are formed in the pump head (2), a plunger cavity (2b1) is formed in the pump head (2), a plunger (3) is arranged in the plunger cavity (2b1), the plunger pump structure is characterized in that a cylindrical sliding portion (2b1b) matched with the plunger (3) is arranged in the middle of the plunger cavity (2b1), the plunger (3) is arranged in the sliding portion (2b1b) and can slide in the sliding portion (2b1b) in a reciprocating mode, a water inlet hole (2b2) and a water outlet hole (2b3) are formed in two ends of the plunger cavity (2b1), all the water inlet holes (2b2) are communicated with the water inlet (2c1), all the water outlet holes (2b3) are communicated with the water inlet (2a) and all the water outlet holes (2b 3985) are respectively communicated with a single-way water inlet valve (3) and a single-way water outlet (395) are formed in the positions A valve (6).

2. Plunger pump structure according to claim 1, characterized in that two water inlet holes (2b2) at the two ends of the plunger chamber (2b1) are symmetrically arranged at the two sides of the sliding part (2b1b), and two water outlet holes (2b3) are symmetrically arranged at the two sides of the sliding part (2b1 b).

3. Plunger pump structure according to claim 1 or 2, characterized in that the pump head (2) is further provided with a water inlet chamber (2c2), the water inlet (2c1) is arranged on the side wall of the water inlet cavity (2c2) and is communicated with the water inlet cavity (2c2), the water inlet cavity (2c2) is positioned at one side of the plunger cavity (2b1), two water inlet holes (2b2) positioned at two ends of the plunger cavity (2b1) are communicated with the water inlet cavity (2c2), the pump head (2) is also provided with a water outlet cavity (2a2), the water outlet (2a1) is arranged on the side wall of the water outlet cavity (2a2) and is communicated with the water outlet cavity (2a2), the water outlet cavity (2a2) is positioned at the other side of the plunger cavity (2b1), and two water outlet holes (2b3) positioned at the two ends of the plunger cavity (2b1) are communicated with the water inlet cavity (2c 2).

4. A plunger pump structure according to claim 3, characterized in that the pump head (2) comprises an upper housing (2a), a middle housing (2b) and a lower housing (2c), the plunger chamber (2b1) is arranged on the middle housing (2b) and the middle housing (2b) is connected with the pump body (1), the upper housing (2a) and the lower housing (2c) are respectively fixed on the upper and lower sides of the middle housing (2b), the water inlet chamber (2c2) is arranged on the lower housing (2c), and the water outlet chamber (2a2) is arranged on the upper housing (2 a).

5. The plunger pump structure as claimed in claim 4, wherein the water inlet check valve (5) comprises a first valve element (5b) and a first cylindrical valve body (5a), the upper end of the first valve body (5a) passes through the water inlet hole (2b2) and extends into the corresponding plunger cavity (2b1), and the end is provided with a first liquid outlet, the lower end of the first valve body (5a) is provided with a first outwardly protruding annular flange (5a1), the first annular flange (5a1) is tightly pressed and fixed between the middle shell (2b) and the lower shell (2c), the lower end of the first valve body (5a) is provided with a first liquid inlet communicated with the water inlet cavity (2c2), the first valve element (5b) is slidably arranged in the first valve body (5a), an elastic piece (5c) is further arranged between the first valve body (5a) and the first valve element (5b), and the first valve element (5b) always moves downwards under the action of the elastic piece (5c) The liquid inlet has a closed trend.

6. The plunger pump structure of claim 5, characterized in that the lower shell (2c) is provided with a first water through hole (2c3) communicated with the water inlet cavity (2c2), the first water through hole (2c3) is a stepped hole, the annular flange (5a1) is embedded in the first water through hole (2c3) and abuts against the stepped surface of the first water through hole (2c3), the middle shell (2b) is provided with a convex annular convex edge (2b4) at the edge of the water inlet hole (2b2), and the annular convex edge (2b4) extends into the first water through hole (2c3) and is pressed on the annular flange (5a 1).

7. The plunger pump structure according to claim 6, characterized in that the outlet check valve (6) comprises a second valve core (6b) and a second cylindrical valve body (6a), the upper end of the second valve body (6a) extends into the water outlet cavity (2a2) and is provided with a second liquid outlet, the lower end of the second valve body (6a) is provided with a second annular flange (6a1) which protrudes outwards, the second annular flange (6a1) is pressed and fixed between the middle shell (2b) and the upper shell (2a), the lower end of the second valve body (6a) is provided with a second liquid inlet which is communicated with the water inlet hole (2b2), the second valve core (6b) is arranged in the second valve body (6a) in a sliding mode, a second elastic part (6c) is further arranged between the second valve body (6a) and the second valve core (6b), and the second valve core (6b) always moves downwards under the action of the second elastic part (6c) to seal the second liquid inlet.

8. The plunger pump structure of claim 7, characterized in that the water outlet hole (2b3) is a stepped hole, the annular flange II (6a1) is embedded in the water outlet hole (2b3) and abuts against the step surface of the water outlet hole (2b3), the upper shell (2a) is provided with a water through hole II (2a3), the upper end of the valve body II (6a) extends into the water outlet cavity (2a2) through the water through hole II (2a3), the edge of the water through hole II (2a3) is provided with a downwardly convex annular flange II (2a4), and the annular flange II (2a4) extends into the water outlet hole (2b3) and presses against the annular flange II (6a 1).

9. The plunger pump structure of claim 8, characterized in that a first sealing ring (7) is further arranged in the first water passing hole (2c3), a first annular caulking groove is formed in the inner peripheral wall of the first sealing ring (7), the first annular flanging (5a1) is embedded in the first annular caulking groove, two end faces of the first sealing ring (7) are respectively and sealingly abutted against the step faces of the first annular convex edge (2b4) and the first water passing hole (2c3), a second sealing ring (8) is further arranged in the water outlet hole (2b3), a second annular caulking groove is formed in the inner peripheral wall of the second sealing ring (8), the second annular flanging (6a1) is embedded in the second annular caulking groove, and two end faces of the second sealing ring (8) are respectively and sealingly abutted against the step faces of the second annular convex edge (2a4) and the water outlet hole (2b 3).

10. The plunger pump structure of claim 4, characterized in that weight reduction grooves (2b5) are formed in the upper side and the lower side of the middle shell (2b), a protruding positioning column (2b6) is arranged in each weight reduction groove (2b5), positioning sleeves (9) are arranged on the upper shell (2a) and the lower shell (2c), and the positioning columns (2b6) can penetrate into the positioning sleeves (9) and are fixed through fasteners.

Images