CN216842075U - Miniature duplex plunger pump - Google Patents

Abstract

The utility model discloses a miniature pair plunger pump belongs to the plunger pump field. It includes integrated into one piece's pump body and first motor, second motor. A water inlet channel, a first group of water suction holes, a first group of water discharge holes, a second group of water suction holes, a first plunger hole, a second plunger hole, a first plunger, a second plunger, a water outlet cavity and a water outlet pipeline are arranged in the pump body; a front pump cover and a rear pump cover are arranged on the front side and the rear side of the pump body, and a water suction cavity, a working cavity, a drainage cavity and a connecting channel are arranged in the front pump cover/the rear pump cover; the first motor and the second motor drive the first plunger piston and the second plunger piston to reciprocate through the eccentric mechanism, so that the suction and the discharge of liquid are realized. The utility model discloses set up two sets of plunger pump structures in a pump body, formed miniature pair plunger pump, its is small, compact structure, convenient to use, low in manufacturing cost, pressure and flow control are convenient, and the life of motor is high.

Description

Miniature duplex plunger pump

Technical Field

The utility model relates to a plunger pump field especially indicates a miniature pair plunger pump.

Background

The plunger pump realizes the suction and discharge of liquid by means of the change of the volume of the sealed working cavity through the reciprocating motion of the plunger in the pump body. The plunger pump has the advantages of high rated pressure, compact structure, high efficiency, convenient flow regulation and the like.

The plunger pump is widely applied to occasions with high pressure, large flow and flow needing to be adjusted. The existing plunger pump generally adopts a pump body and is powered by a motor, the pressure and flow provided by a single plunger pump are smaller, and if larger flow and pressure are needed, the existing plunger pump generally solves the problems by the following two methods:

one approach is to combine two or more plunger pumps to connect the water inlets/outlets of multiple plunger pumps together via external piping to achieve greater flow and pressure. However, the combined use of a plurality of plunger pumps and the connection through the external pipeline lead to large overall volume, complex arrangement of the external pipeline and inconvenient use.

The other method is to enlarge the plunger pump and use a pump body structure with large volume and a motor with large specification as power. However, the cost of the plunger pump is increased sharply due to the large-size pump body structure and the large-size motor, and the manufacturing cost is high; the working current of the motor is large, so that the service life of the motor is influenced; the pressure and flow regulation is inconvenient, redundant power needs to be unloaded when small-pressure and small-flow operation is carried out, the power of a motor is wasted, and the economical efficiency is poor.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model provides a miniature duplex plunger pump, the utility model discloses it is small, compact structure, convenient to use, low in manufacturing cost, pressure and flow control are convenient, and the life of motor is high.

The utility model provides a technical scheme as follows:

the utility model provides a miniature pair plunger pump, includes the pump body and is located first motor and the second motor of pump body below, wherein:

the pump body is of an integrally formed structure, a water inlet channel from left to right is formed in the pump body, a water inlet is formed in the leftmost end of the water inlet channel, and a first group of water suction holes, a first group of water discharge holes, a second group of water discharge holes and a second group of water suction holes are sequentially formed in the pump body from left to right;

the first group of water suction holes and the second group of water suction holes respectively comprise two water suction hole units which are symmetrically arranged on the front side and the rear side of the water inlet channel and are communicated with the water inlet channel, and a water suction one-way valve is arranged in each water suction hole unit; the first group of drain holes and the second group of drain holes respectively comprise two drain hole units which are symmetrically arranged at the front side and the rear side of the water inlet channel, and a drain check valve is arranged in each drain hole unit;

a first plunger hole is formed between the first group of water suction holes and the first group of drain holes, a second plunger hole is formed between the second group of drain holes and the second group of water suction holes, the first plunger hole and the second plunger hole are arranged in the front-back direction and penetrate through the front surface and the rear surface of the pump body, and the first plunger hole and the second plunger hole are both positioned below the water inlet channel;

the first plunger and the second plunger in the front-back direction are respectively arranged in the first plunger hole and the second plunger hole, and the first motor and the second motor respectively drive the first plunger and the second plunger to reciprocate back and forth through respective eccentric mechanisms;

the front side and the rear side of the pump body are respectively fixedly provided with a front pump cover and a rear pump cover which are symmetrical, two groups of water suction cavities, working cavities and drainage cavities are respectively arranged in the front pump cover and the rear pump cover, and each group of water suction cavities, working cavities and drainage cavities are communicated through a connecting channel; the positions of the water suction cavity, the working cavity and the water discharge cavity are respectively opposite to the positions of the water suction hole unit, the first plunger piston hole/second plunger piston hole and the water discharge hole unit;

each drain hole unit is connected with a common water outlet cavity through a high-pressure water outlet, the water outlet cavity is located above the drain hole unit, the water outlet cavity is connected with an upward water outlet pipeline, and the uppermost end of the water outlet pipeline is a water outlet.

Furthermore, notches are formed in the lower sides of the first plunger and the second plunger, the eccentric mechanism comprises an eccentric wheel and an eccentric wheel bearing, and output shafts of the first motor and the second motor are respectively matched with the notches of the first plunger and the second plunger through respective eccentric wheels and eccentric wheel bearings to drive the first plunger and the second plunger to reciprocate back and forth.

Furthermore, a first motor connecting hole and a second motor connecting hole are respectively arranged below the first plunger hole and the second plunger hole, the first motor connecting hole and the second motor connecting hole are both arranged in the vertical direction and are respectively communicated with the first plunger hole and the second plunger hole, and the eccentric mechanisms of the first motor and the second motor are respectively positioned in the first motor connecting hole and the second motor connecting hole.

Furthermore, the output shafts of the first motor and the second motor are respectively connected with respective transmission gear sets, each transmission gear set comprises a driving gear connected with the output shafts of the first motor and the second motor, a duplicate gear set connected with the driving gear and a driven gear connected with the duplicate gear set, and the driven gear is connected with the eccentric wheel.

Furthermore, the front end and the rear end of the first plunger/the second plunger are respectively sleeved with a sealing ring, a guide pressure pad and a water seal, the sealing ring is positioned between the first plunger/the second plunger and the first plunger hole/the second plunger hole, the guide pressure pad is positioned on the outer side of the sealing ring, one part of the guide pressure pad is pressed on the periphery of the sealing ring, the other part of the guide pressure pad is sleeved on the first plunger/the second plunger, and the water seal is positioned on the outer side of the guide pressure pad.

Furthermore, sealing gaskets are respectively arranged between the pump body and the front pump cover and between the pump body and the rear pump cover.

Furthermore, the water absorption one-way valve comprises a water absorption one-way valve core and a water absorption one-way valve spring, a water absorption spring support column is arranged in the front pump cover/the rear pump cover, one end of the water absorption one-way valve spring is connected with the water absorption spring support column, the other end of the water absorption one-way valve spring is connected with the water absorption one-way valve core, and the water absorption one-way valve core is tightly pressed on the pump body at the water absorption hole unit under the action of the water absorption one-way valve spring to realize the one-way sealing of the water absorption hole unit and the water absorption cavity;

the drainage check valve comprises a drainage check valve core and a drainage check valve spring, a drainage spring support is arranged in the drainage hole unit, one end of the drainage check valve spring is connected with the drainage spring support, the other end of the drainage check valve spring is connected with the drainage check valve core, and the drainage check valve core is tightly pressed on a front pump cover/a rear pump cover at the drainage cavity under the action of the drainage check valve spring to realize one-way sealing of the drainage hole unit and the drainage cavity;

the valve core of the water absorption one-way valve and the valve core of the water discharge one-way valve are made of elastic materials.

Furthermore, the side wall of the front pump cover/the rear pump cover positioned on one side of the water suction cavity is provided with a fabrication hole communicated with the connecting channel, and the fabrication hole is blocked by a blocking structure after the micro duplex plunger pump is assembled.

Furthermore, the high-pressure water outlet is formed in the side wall of the top of the drain hole unit.

Furthermore, the front pump cover and the rear pump cover are respectively of an integrated structure, and two groups of water suction cavities, working cavities and drainage cavities are formed in the front pump cover and the rear pump cover of the integrated structure;

or the front pump cover and the rear pump cover respectively comprise two pump cover units which are separated, and a group of water suction cavity, a working cavity and a water drainage cavity are formed in each pump cover unit.

The utility model discloses following beneficial effect has:

the utility model discloses set up two sets of plunger pump structures in a pump body, formed miniature pair plunger pump, compared single plunger pump, realized double flow and pressure. The pump body is of an integrally formed structure, and the structures and the positions of the water inlet channel, the first group of water suction holes, the first group of water discharge holes, the second group of water suction holes, the first plunger hole, the second plunger hole, the first plunger, the second plunger, the water outlet cavity, the water outlet pipeline and the water suction cavity, the working cavity, the water discharge cavity and the connecting channel in the front pump cover/the rear pump cover are arranged, so that the two sets of plunger pump structures in the pump body share the water inlet channel and the water outlet pipeline in the pump body, and the miniature duplex plunger pump is small in whole volume, compact in structure, convenient to use and low in manufacturing cost.

The utility model discloses can the work of arbitrary motor of independent control, also can two motors of simultaneous control simultaneous working, be applicable to little flow occasion and large-traffic occasion respectively, pressure and flow control are convenient, need not drop unnecessary power off-load when carrying out little pressure and little flow operation, and economic nature is good. And the specification of a single motor is small, when two motors work simultaneously, the current of the single motor is approximately equal to the current of the motor when the motor works, and the service life of the motor is long.

Drawings

FIG. 1 is a perspective view of a micro duplex plunger pump of the present invention;

FIG. 2 is a left side view of the micro dual plunger pump of the present invention;

FIG. 3 is a front view of the micro dual plunger pump of the present invention;

FIG. 4 is a sectional view of the micro-twin plunger pump of the present invention in the A-A direction;

FIG. 5 is a B-B direction cross-sectional view of the micro duplex plunger pump of the present invention;

FIG. 6 is a C-C sectional view of the micro duplex plunger pump of the present invention;

FIG. 7 is a D-D cross-sectional view of the micro duplex plunger pump of the present invention;

fig. 8 is a sectional view of the miniature duplex plunger pump of the present invention in the direction of E-E;

FIG. 9 is a sectional view of the micro-twin plunger pump of the present invention in the F-F direction;

FIG. 10 is a perspective view of the pump body;

FIG. 11 is a vertical cross-sectional view of the pump body taken along its length;

FIG. 12 is a horizontal cross-sectional view of the pump body;

FIG. 13 is a vertical cross-sectional view of the pump body taken along the width direction;

fig. 14 is a perspective view of the pump cover unit;

fig. 15 is a sectional view of the pump cover unit.

Detailed Description

In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the following detailed description will be given with reference to the accompanying drawings and specific embodiments.

An embodiment of the utility model provides a miniature pair plunger pump, for the convenient description to miniature pair plunger pump structure, the utility model discloses in to the definition in upper and lower, left and right, preceding, back position etc. see in the accompanying drawing to upper and lower, left and right, preceding, the mark after, in each accompanying drawing to upper and lower, left and right, preceding, the mark after unanimous.

As shown in fig. 1 to 15, the micro duplex plunger pump includes a pump body 1, and a first motor 2 and a second motor 3 located below the pump body 1, where the first motor 2 and the second motor 3 are dc motors, where:

the utility model discloses a pump body 1 is the duplex pump body, and this duplex pump body is integrated into one piece's structure, has seted up inhalant canal 4 from a left side right in the pump body 1, and this inhalant canal 4 leftmost end is water inlet 5, and the water inlet is used for being connected with outside inlet channel. In one example, the outer surface of the water inlet is provided with a connection structure such as a screw thread connected with an external water inlet pipe.

A first group of water suction holes 6, a first group of water discharge holes 7, a second group of water discharge holes 8 and a second group of water suction holes 9 are sequentially formed in the pump body 1 from left to right.

The first group of water suction holes 6 and the second group of water suction holes 9 comprise two water suction hole units 10 which are symmetrically arranged on the front side and the rear side of the water inlet channel 4 and communicated with the water inlet channel 4, and a water suction check valve 11 is arranged in each water suction hole unit 10.

The first group of drain holes 7 and the second group of drain holes 8 respectively comprise two drain hole units 12 which are symmetrically arranged at the front side and the rear side of the water inlet channel 4, the drain hole units 12 are not communicated with the water inlet channel 4, and a drain check valve 13 is arranged in each drain hole unit 12.

A first plunger hole 14 is formed between the first group of water suction holes 6 and the first group of water discharge holes 7, a second plunger hole 15 is formed between the second group of water suction holes 8 and the second group of water suction holes 9, the first plunger hole 14 and the second plunger hole 15 are arranged in the front-back direction and penetrate through the front surface and the rear surface of the pump body 1, the first plunger hole 14 and the second plunger hole 15 are located below the water inlet channel 4 and located below the first group of water discharge holes 7, the second group of water discharge holes 8 and the second group of water suction holes 9.

Because water inlet channel 4 sets up from left to right in pump body 1, and first plunger hole 14 and second plunger hole 15 are located second group water absorption hole 9 left, in order to prevent that first plunger hole 14 and second plunger hole 15 from hindering water inlet channel 4, set up first plunger hole 14 and second plunger hole 15 in water inlet channel 4's below for first plunger hole 14 and second plunger hole 15 do not communicate with water inlet channel 4.

The first group of drain holes 7, the second group of drain holes 8 and the second group of suction holes 9 have the same height as the water inlet channel 4, so the first plunger hole 14 and the second plunger hole 15 are also positioned below the first group of drain holes 7, the second group of drain holes 8 and the second group of suction holes 9, and the first plunger hole 14 and the second plunger hole 15 are also not communicated with the first group of drain holes 7, the second group of drain holes 8 and the second group of suction holes 9.

The first plunger hole 14 and the second plunger hole 15 are internally provided with a first plunger 16 and a second plunger 17 in the front-back direction respectively, and the first plunger 16 and the second plunger 17 are cylindrical structures and can be made of stainless steel. The first motor 2 and the second motor 3 drive the first plunger 16 and the second plunger 17 to reciprocate back and forth, respectively, through respective eccentric mechanisms 18. The present invention does not limit the specific structure of the eccentric mechanism 18, as long as the reciprocating motion of the first plunger 16 and the second plunger 17 can be achieved.

The front side and the rear side of the pump body 1 are respectively and fixedly provided with a front pump cover 19 and a rear pump cover 20 which are symmetrical, and the front pump cover 19 and the rear pump cover 20 are connected with the pump body 1 through screws. Two groups of water suction cavities 21, working cavities 22 and water drainage cavities 23 are formed in the front pump cover 19 and the rear pump cover 20, and each group of water suction cavities 21, working cavities 22 and water drainage cavities 23 are communicated through a connecting channel 24.

The positions of the water suction cavity 21, the working cavity 22 and the drainage cavity 23 are respectively positioned at the outer sides of the water suction hole unit 10, the first plunger hole 14/second plunger hole 15 and the drainage hole unit 12, the positions of the water suction cavity 21 and the drainage cavity 23 are respectively opposite to the positions of the water suction hole unit 10 and the drainage hole unit 12, and the position of the working cavity 22 is opposite to the position of the first plunger hole 14/second plunger hole 15, namely the height of the water suction cavity 21 and the height of the drainage cavity 23 are higher than that of the working cavity 22. The connecting channel 24 can be arranged between the heights of the water suction cavity 21, the water discharge cavity 23 and the working cavity 22, the upper side of the connecting channel 24 is communicated with the water suction cavity 21 and the water discharge cavity 23, and the lower side is communicated with the working cavity 22.

Each of the drainage bore units 12 is connected to a common outlet chamber 26 via a high-pressure outlet 25. The number of the drain hole units 12 is four, and the liquid discharged by the four drain hole units 12 is collected into a water outlet cavity 26.

The water outlet cavity 26 is located above the drain hole unit 12, the water outlet cavity 26 is connected with an upward water outlet pipe 27, and the uppermost end of the water outlet pipe 27 is a water outlet 28. The water outlet 28 is adapted to be connected to an external water outlet conduit. In one example, the outer surface of the water outlet is provided with a connection structure such as a screw thread connected with an external water outlet pipe.

The utility model discloses at the during operation, the rotation of first motor 2 and second motor 3 drives first plunger 16 and second plunger 17 reciprocating motion through respective eccentric mechanism 18. The working chambers 22 on the front pump cover 19 and the rear pump cover 20 are aligned with the first plunger hole 14/the second plunger hole 15. The first plunger 16 and the second plunger 17 reciprocate back and forth so that the volume of the working chamber 22 alternately increases and decreases.

When the volume of the working chamber 22 increases, the pressure in the working chamber 22 decreases, and the low pressure is transmitted to the suction check valve 11 in the suction hole unit 10 through the connection passage 24 and the suction chamber 21, so that the suction check valve 11 is opened; at the same time, the low pressure is transmitted to the drain check valve 13 in the drain hole unit 12 through the connection passage 24 and the drain chamber 23, so that the drain check valve 13 is closed.

After the water-absorbing one-way valve 11 is opened, the liquid in the water inlet pipe 4 enters the working cavity 22 through the water-absorbing hole unit 10, the water-absorbing cavity 21 and the connecting channel 24 under the action of low pressure, and the water-absorbing action is finished. Meanwhile, external liquid enters the water inlet channel 4 through the external water inlet pipeline and the water inlet 5.

When the volume of the working chamber 22 is reduced, the pressure in the working chamber 22 is increased, and the high pressure is transmitted to the suction check valve 11 in the suction hole unit 10 through the connection passage 24 and the suction chamber 21, so that the suction check valve 11 is closed; at the same time, the high pressure is transmitted to the drain check valve 13 in the drain hole unit 12 through the connection passage 24 and the drain chamber 23, so that the drain check valve 13 is opened.

After the drainage check valve 13 is opened, the liquid in the working chamber 22 enters the water outlet chamber 26 through the connecting channel 24, the drainage chamber 23, the drainage hole unit 12 and the high-pressure water outlet 25 under the action of high pressure, and enters an external water outlet pipeline through the water outlet pipeline 27 and the water outlet 28, so that the water outlet action is completed.

The utility model discloses set up two sets of plunger pump structures in a pump body, formed miniature pair plunger pump, compared single plunger pump, realized double flow and pressure. The pump body is of an integrally formed structure, and the structure and the position of the water inlet channel, the first group of water suction holes, the first group of drain holes, the second group of water suction holes, the first plunger hole, the second plunger hole, the first plunger, the second plunger, the water outlet cavity, the water outlet pipeline, the water suction cavity in the front pump cover/the rear pump cover, the working cavity, the water drainage cavity and the connecting channel are arranged, so that the two sets of plunger pump structures in the pump body share the water inlet channel and the water outlet pipeline in the pump body, and the micro duplex plunger pump is small in overall size, compact in structure, convenient to use and low in manufacturing cost.

The utility model discloses can the work of arbitrary motor of independent control, also can two motors of simultaneous control simultaneous working, be applicable to little flow occasion and large-traffic occasion respectively, pressure and flow control are convenient, need not drop unnecessary power off-load when carrying out little pressure and little flow operation, and economic nature is good. And the specification of a single motor is small, when two motors work simultaneously, the current of the single motor is approximately equal to the current of the motor when the motor works, and the service life of the motor is long.

In one example, notches 29 are formed in the lower sides of the first plunger 16 and the second plunger 17, the eccentric mechanism 18 comprises an eccentric wheel 30 and an eccentric wheel bearing 31, and the output shafts 32 of the first motor 2 and the second motor 3 are respectively matched with the notches of the first plunger 16 and the second plunger 17 through the respective eccentric wheel 30 and the eccentric wheel bearing 31 to drive the first plunger 16 and the second plunger 17 to reciprocate back and forth.

In order to realize the matching of the first plunger 16 and the second plunger 17 with the first motor 2 and the second motor 3, a first motor connecting hole 33 and a second motor connecting hole 34 are respectively arranged below the first plunger hole 14 and the second plunger hole 15, the first motor connecting hole 33 and the second motor connecting hole 34 are both arranged in the vertical direction and are respectively communicated with the first plunger hole 14 and the second plunger hole 15, and the eccentric mechanisms 18 of the first motor 2 and the second motor 3 are respectively positioned in the first motor connecting hole 14 and the second motor connecting hole 15.

The output shafts 32 of the first motor 2 and the second motor 3 are respectively connected with respective transmission gear sets 35, the transmission gear sets 35 are used for transmission and speed reduction, the transmission gear sets 35 are positioned in a speed reduction box 36, and the speed reduction box 36 is formed by splicing an upper gear box shell 37 and a lower gear box shell 38.

The transmission gear set 35 includes a driving gear 39 connected to the output shaft 32 of the first motor 2/the second motor 3, a double gear set 40 connected to the driving gear 39, and a driven gear 41 connected to the double gear set 40, and the driven gear 41 is connected to the eccentric wheel 30.

Reciprocating motion around first plunger and second plunger, for preventing that the liquid in the working chamber from getting into reducing gear box and motor through the gap between first plunger/second plunger and the pump body/preceding pump cover/back pump cover, the utility model discloses all overlap on first plunger 16/second plunger 17 the front and back both ends and have sealing washer 42, direction pressure pad 43 and water seal 44, sealing washer 42, direction pressure pad 43 and water seal 44 receive the pump body, preceding pump cover, the restraint of back pump cover is fixed motionless, first plunger 16/second plunger 17 when reciprocating motion around with sealing washer 42, direction pressure pad 43 and water seal 44 relative slip, realize sealed to liquid.

Specifically, the gasket 42 is located between the first/ second plungers 16, 17 and the first plunger bore 14

Between the second plunger hole 15, the guide pressure pad 43 is located at the outer side of the sealing ring 42, one part of the guide pressure pad 43 is pressed on the periphery of the sealing ring 42, the other part of the guide pressure pad is sleeved on the first plunger 16/the second plunger 17, the guide pressure pad 43 is located at the joint of the pump body 1 and the front pump cover/the rear pump cover, the water seal 44 is located at the outer side of the guide pressure pad 43, and the water seal 43 is located in the front pump cover/the rear pump cover.

The first plunger 16/second plunger 17 is in sliding friction with the seal ring 42, the guide pressure pad 43 and the water seal 44 during the back and forth reciprocating motion, and the friction easily abrades the outer surface of the first plunger 16/second plunger 17, resulting in scratches. After the first plunger 16/the second plunger 17 is scratched, the sealing with the sealing ring 42, the guide pressure pad 43 and the water seal 44 cannot be ensured, so that the service life of the first plunger 16/the second plunger 17 is shortened, and the sealing effect is reduced.

In order to prolong the service life and improve the sealing effect of the first plunger 16/the second plunger 17, the utility model discloses set up wear-resisting ceramic layer at the surface of the friction position of first plunger 16/second plunger 17 and sealing washer 42, direction pressure pad 43 and water seal 44.

Sealing gaskets 45 are respectively arranged between the pump body 1 and the front pump cover 19 and between the pump body 1 and the rear pump cover 20, so that waterproof sealing between the pump body 1 and the front pump cover 19 and between the pump body and the rear pump cover 20 is realized.

The check valve in the prior art generally comprises a valve seat, a valve core and a spring, wherein the valve core is pressed on the valve seat through the spring to realize sealing in one direction, and when the pressure of liquid is greater than the pressure of the spring, the valve seat and the valve core are opened to realize conduction in the other direction.

However, the check valve in the prior art has complex structure, more parts and inconvenient assembly, the valve seat and the valve core are hard parts, the pressure sealing of the spring is relied on, the spring with larger elasticity is needed, and the processing precision of the contact surface of the valve seat and the valve core is required.

The utility model discloses a check valve 11 absorbs water includes the check valve case 46 that absorbs water and the check valve spring 47 that absorbs water, be provided with the spring pillar 48 that absorbs water in the 19 pump covers of preceding pump cover back pump cover 20, the one end and the spring pillar 48 that absorbs water of the check valve spring 47 are connected, the other end with absorb water check valve case 46 and be connected, the check valve case 46 that absorbs water compresses tightly on the pump body 1 of water absorption hole unit 10 department under the effect of the check valve spring 47 that absorbs water, the realization is to the one-way seal in water absorption hole unit 10 and water absorption chamber 21, the material of the check valve case 46 that absorbs water is elastic material.

The utility model discloses to absorb water check valve case 46 sets up to elastic material, has left out the disk seat, and the check valve case 46 that absorbs water directly cooperates with the pump body 1, realizes one-way seal under the pressure of the check valve spring 47 that absorbs water. The valve seat component is omitted, the number of components is small, and the assembly is simple. The valve core 46 of the water absorption one-way valve is made of elastic materials, the sealing with the pump body is convenient, the requirement on the elasticity of a spring is not high, and the requirement on the processing precision is also low.

Similarly, the drain check valve 13 includes a drain check valve spool 49 and a drain check valve spring 50, and a drain spring support 51 is provided in the drain hole unit 12, and the drain spring support 51 is located on the pump body 1 and is integrated with the pump body 1. One end of the drainage check valve spring 50 is connected with the drainage spring strut 51, the other end is connected with the drainage check valve core 49, the drainage check valve core 49 is pressed on the front pump cover 19/the rear pump cover 20 at the drainage cavity 23 under the action of the drainage check valve spring 50, the one-way sealing of the drainage hole unit 12 and the drainage cavity 23 is realized, and the drainage check valve core 49 is made of elastic materials.

The connecting channel 24 for communicating the water suction cavity 21, the working cavity 22 and the drainage cavity 23 is inconvenient to process, in order to realize the convenient processing of the channel communication 24, a process hole 52 communicated with the connecting channel 24 is formed in the side wall of the front pump cover 19/the rear pump cover 20 positioned on one side of the water suction cavity 21, and the process hole 52 is blocked by a blocking structure after the micro duplex plunger pump is assembled, so that water leakage is prevented.

The high-pressure water outlets 25 are formed in the side walls of the tops of the drain hole units 12, the four drain hole units 12 are located in the middle of the pump body 1, and the high-pressure water outlets 25 are located in the middle of the pump body 1 and above the four drain hole units 12.

The utility model discloses in, preceding pump cover 19 and back pump cover 20 can be respectively structure as an organic whole, have all seted up two sets of chamber 21 that absorb water, working chamber 22 and the drainage chamber 23 of absorbing water in the preceding pump cover 19 of a body structure and the back pump cover 20, and the preceding pump cover 19 of a body structure and back pump cover 20 make the quantity of part reduce, convenient assembling.

Or, the front pump cover 19 and the rear pump cover 20 respectively include two pump cover units 53 that are separated, and a group of water suction cavity 21, working cavity 22 and drainage cavity 23 are all opened in each pump cover unit 53.

The foregoing is a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations should also be regarded as the protection scope of the present invention.

Claims (10)

1. The utility model provides a miniature pair plunger pump which characterized in that, includes the pump body and is located first motor and the second motor of pump body below, wherein:

the pump body is of an integrally formed structure, a water inlet channel from left to right is formed in the pump body, a water inlet is formed in the leftmost end of the water inlet channel, and a first group of water suction holes, a first group of water discharge holes, a second group of water discharge holes and a second group of water suction holes are sequentially formed in the pump body from left to right;

the first group of water suction holes and the second group of water suction holes respectively comprise two water suction hole units which are symmetrically arranged on the front side and the rear side of the water inlet channel and are communicated with the water inlet channel, and a water suction one-way valve is arranged in each water suction hole unit; the first group of drain holes and the second group of drain holes respectively comprise two drain hole units which are symmetrically arranged at the front side and the rear side of the water inlet channel, and a drain check valve is arranged in each drain hole unit;

a first plunger hole is formed between the first group of water suction holes and the first group of drain holes, a second plunger hole is formed between the second group of drain holes and the second group of water suction holes, the first plunger hole and the second plunger hole are arranged in the front-back direction and penetrate through the front surface and the rear surface of the pump body, and the first plunger hole and the second plunger hole are both positioned below the water inlet channel;

the first plunger and the second plunger in the front-back direction are respectively arranged in the first plunger hole and the second plunger hole, and the first motor and the second motor respectively drive the first plunger and the second plunger to reciprocate back and forth through respective eccentric mechanisms;

the front side and the rear side of the pump body are respectively fixedly provided with a front pump cover and a rear pump cover which are symmetrical, two groups of water suction cavities, working cavities and drainage cavities are respectively arranged in the front pump cover and the rear pump cover, and each group of water suction cavities, working cavities and drainage cavities are communicated through a connecting channel; the positions of the water suction cavity, the working cavity and the water discharge cavity are respectively opposite to the positions of the water suction hole unit, the first plunger piston hole/second plunger piston hole and the water discharge hole unit;

each drain hole unit is connected with a common water outlet cavity through a high-pressure water outlet, the water outlet cavity is located above the drain hole unit, the water outlet cavity is connected with an upward water outlet pipeline, and the uppermost end of the water outlet pipeline is a water outlet.

2. The miniature dual plunger pump according to claim 1, wherein the first plunger and the second plunger are provided with notches at the lower sides thereof, the eccentric mechanism comprises an eccentric wheel and an eccentric wheel bearing, and the output shafts of the first motor and the second motor are respectively matched with the notches of the first plunger and the second plunger through the respective eccentric wheel and the eccentric wheel bearing to drive the first plunger and the second plunger to reciprocate back and forth.

3. The miniature dual plunger pump according to claim 2, wherein a first motor connecting hole and a second motor connecting hole are respectively formed below the first plunger hole and the second plunger hole, the first motor connecting hole and the second motor connecting hole are vertically arranged and are respectively communicated with the first plunger hole and the second plunger hole, and the eccentric mechanisms of the first motor and the second motor are respectively located in the first motor connecting hole and the second motor connecting hole.

4. A micro-size dual plunger pump according to claim 3, wherein the output shafts of the first and second motors are respectively connected with a respective transmission gear set, the transmission gear set comprises a driving gear connected with the output shafts of the first and second motors, a dual gear set connected with the driving gear, and a driven gear connected with the dual gear set, and the driven gear is connected with the eccentric wheel.

5. The miniature dual plunger pump according to claim 1, wherein the front and rear ends of the first/second plunger are respectively sleeved with a sealing ring, a guiding pressure pad and a water seal, the sealing ring is positioned between the first/second plunger and the first/second plunger hole, the guiding pressure pad is positioned outside the sealing ring, one part of the guiding pressure pad presses on the periphery of the sealing ring, the other part of the guiding pressure pad is sleeved on the first/second plunger, and the water seal is positioned outside the guiding pressure pad.

6. The miniature dual plunger pump of claim 5, wherein sealing gaskets are disposed between the pump body and the front and rear pump covers, respectively.

7. The miniature dual plunger pump according to claim 1, wherein the water-sucking check valve comprises a water-sucking check valve core and a water-sucking check valve spring, a water-sucking spring strut is arranged in the front pump cover/the rear pump cover, one end of the water-sucking check valve spring is connected with the water-sucking spring strut, the other end of the water-sucking check valve spring is connected with the water-sucking check valve core, and the water-sucking check valve core is pressed on the pump body at the water-sucking hole unit under the action of the water-sucking check valve spring to realize one-way sealing of the water-sucking hole unit and the water-sucking cavity;

the drainage check valve comprises a drainage check valve core and a drainage check valve spring, a drainage spring support is arranged in the drainage hole unit, one end of the drainage check valve spring is connected with the drainage spring support, the other end of the drainage check valve spring is connected with the drainage check valve core, and the drainage check valve core is tightly pressed on the front pump cover/the rear pump cover at the drainage cavity under the action of the drainage check valve spring to realize one-way sealing of the drainage hole unit and the drainage cavity;

the valve core of the water absorption one-way valve and the valve core of the water discharge one-way valve are made of elastic materials.

8. The micro duplex plunger pump according to claim 1, wherein a fabrication hole communicated with the connecting channel is formed in a side wall of the front pump cover/the rear pump cover on one side of the water suction cavity, and the fabrication hole is blocked by a blocking structure after the micro duplex plunger pump is assembled.

9. The miniature tandem plunger pump according to any one of claims 1 to 8, wherein said high pressure water outlet is provided on a side wall of a top portion of said water discharging hole unit.

10. The miniature dual plunger pump of any one of claims 1-8, wherein the front pump cover and the rear pump cover are respectively of an integrated structure, and two sets of water suction cavities, working cavities and drainage cavities are respectively arranged in the front pump cover and the rear pump cover of the integrated structure;

or the front pump cover and the rear pump cover respectively comprise two pump cover units which are separated, and a group of water suction cavity, a working cavity and a water drainage cavity are formed in each pump cover unit.

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