CN208793203U - A kind of reciprocating Small Plunger Pump - Google Patents

Abstract

The utility model discloses a kind of reciprocating Small Plunger Pumps, including the pump housing and plunger, wobbler shaft is installed in the middle part of the pump housing cavity, and wobbler shaft lower end is provided with thrust bearing, the upper end is fixed with spring one, and thrust bearing is provided with above spring one, and spring one is located at below stopper head, lower end is equipped with plunger case on the left of the pump body, and the second steel ball is provided on the right side of plunger case, the first steel ball is installed below the plunger case, and first is fixed with oil outlet below steel ball, the pump housing lower end is provided with oil outlet, and check valve is installed inside oil outlet, oil inlet is provided on the right side of the pump housing, and oil inlet is located at wobbler shaft lower right-hand side.The reciprocating Small Plunger Pump thrust bearing shape is cam-like structure, the cam-like structure of thrust bearing enables to plunger gently to rise or fall during rotation, effectively reduce device as thrust bearing drop is larger and caused by device damage or the unstable situation of device fuel feeding.

Description

A kind of reciprocating Small Plunger Pump

Technical field

The utility model relates to plunger pump device technical field, specially a kind of reciprocating Small Plunger Pump.

Background technique

Reciprocating Small Plunger Pump is an important device of hydraulic system, it is moved back and forth in cylinder body by plunger, The volume of seal operation cavity is set to change to realize oil suction, pressure oil, MP series mini plunger pump is small size, a height Accuracy, the product line of long-life can be realized single 5ml following fluid transmission, can satisfy in-vitro diagnosis Medical Devices with And the fluid transmission requirement that analysis instrument is stringent, it is significantly sent out with the development of science and technology, reciprocating Small Plunger Pump has Exhibition, type and quantity are also just growing day by day.Although reciprocating Small Plunger Pump type and quantity currently on the market are very It is more, but most of reciprocating Miniature plunger pump plunger material corrosion resistance is bad, causing device plunger to be corroded influences dress The service life set, and thrust bearing drop be easy to cause greatly device inner body to damage, and this significantly limits past The use scope of compound Small Plunger Pump, and using not convenient enough, flexible.

Utility model content

The purpose of this utility model is to provide a kind of reciprocating Small Plunger Pumps, to solve above-mentioned background technique proposition Reciprocating Miniature plunger pump plunger material corrosion resistance currently on the market is bad and thrust bearing drop be easy to cause greatly dress The problem of setting inner body damage.

To achieve the above object, the utility model provides the following technical solutions: a kind of reciprocating Small Plunger Pump, including pump Body and plunger, the pump housing cavity middle part is equipped with wobbler shaft, and wobbler shaft lower end is provided with thrust bearing, the upper end It is fixed with spring one, and is provided with thrust bearing above spring one, the plunger is connected through spring with plunger case, and spring One is located at below stopper head, and lower end is equipped with plunger case on the left of the pump body, and is provided with the second steel ball on the right side of plunger case, First steel ball is installed below the plunger case, and is fixed with oil outlet below the first steel ball, the pump housing lower end is provided with out Hydraulic fluid port, and check valve is installed inside oil outlet, oil inlet is provided on the right side of the pump housing, and oil inlet is located on the right side of wobbler shaft Lower section.

Preferably, the thrust bearing shape is cam-like structure.

Preferably, the stopper head upper end is convex structure, and the upper end convex structure width and thrust bearing shape are convex Wheel-like structure width is equal, and is helicitic texture outside stopper head lower end.

Preferably, the plunger uses PCTFE material, and is helicitic texture inside the upper end, and spiral shell inside plunger end Line structure matches with stopper head lower end external screw-thread structure.

Preferably, the check valve includes valve body, pressure pin, baffle and spring two, and pressure pin is connected through baffle with valve body It connects, baffle is located at valve inner, and is provided with spring two below baffle.

Compared with prior art, the utility model has the beneficial effects that the reciprocating Small Plunger Pump thrust bearing shape Cam-like structure for cam-like structure, thrust bearing enables to plunger gently to rise or fall during rotation, has Effect ground reduce device as thrust bearing drop is larger and caused by device damage or the unstable situation of device fuel feeding, Stopper head upper end is convex structure, and the upper end convex structure width is equal with thrust bearing profile cams shape structure width, and And be helicitic texture outside stopper head lower end, the contact area of stopper head and thrust bearing can be reduced, reduce frictional force, reduced Energy loss, while the volume of device can be reduced, so that device is more light small and exquisite, plunger uses PCTFE material, and thereon Internal end is helicitic texture, and plunger end internal threading arrangement matches with stopper head lower end external screw-thread structure, the material Good corrosion resistance effectively reduces the influence corroded to device, extends the service life of device, and stopper head and plunger case are logical Cross helicitic texture to be connected, can facilitate and stopper head is replaced, reduce the maintenance cost of device, check valve include valve body, Pressure pin, baffle and spring two, and pressure pin is connected through baffle with valve body, baffle is located at valve inner, and sets below baffle It is equipped with spring two, effectively oil liquid can be avoided to flow back when the device is closed, corollary equipment is impacted.

Detailed description of the invention

FIG. 1 is a schematic structural view of the utility model；

Fig. 2 is partial enlargement structural representation at A in the utility model Fig. 1；

Fig. 3 is the utility model stopper head structural schematic diagram；

Fig. 4 is the utility model one-way valve structures schematic diagram.

In figure: 1, the pump housing, 2, wobbler shaft, 3, thrust bearing, 4, stopper head, 5, spring one, 6, plunger, 7, plunger case, 8, Check valve, 801, valve body, 802, pressure pin, 803, baffle, 804, spring two, 9, oil outlet, the 10, first steel ball, the 11, second steel Ball, 12, oil inlet.

Specific embodiment

The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work Every other embodiment obtained, fall within the protection scope of the utility model.

Fig. 1-4 is please referred to, the utility model provides a kind of technical solution: a kind of reciprocating Small Plunger Pump, including the pump housing 1 With plunger 6,1 cavity of pump housing middle part is equipped with wobbler shaft 2, and 2 lower end of wobbler shaft is provided with thrust bearing 3,3 shape of thrust bearing Cam-like structure for cam-like structure, thrust bearing 3 enables to plunger 6 gently to rise or fall during rotation, Efficiently reduce device as 3 drop of thrust bearing is larger and caused by device damage or the unstable feelings of device fuel feeding Condition, 6 upper end of plunger are fixed with spring 1, and plunger 6 uses PCTFE material, and is helicitic texture inside the upper end, and plunger 6 End internal threading arrangement matches with 4 lower end external screw-thread structure of stopper head, and the material corrosion resistance is good, effectively reduces corrosion pair The influence of device extends the service life of device, and stopper head 4 is connected with plunger case 7 by helicitic texture, Neng Goufang Just stopper head 4 is replaced, reduces the maintenance cost of device, and one 5 top of spring is provided with thrust bearing 3, plunger 6 runs through Spring 1 is connected with plunger case 7, and spring 1 is located at 4 lower section of stopper head, and 4 upper end of stopper head is convex structure, and thereon It holds convex structure width equal with 3 profile cams shape structure width of thrust bearing, and is screw thread knot outside 4 lower end of stopper head Structure can reduce the contact area of stopper head 4 Yu thrust bearing 3, reduce frictional force, reduce energy loss, while can reduce The volume of device, so that device is more light small and exquisite, 1 inside left lower end of the pump housing is equipped with plunger case 7, and 7 right side of plunger case It is provided with the second steel ball 11, the first steel ball 10 is installed, and be fixed with oil outlet 9 below the first steel ball 10 below plunger case 7, is pumped 1 lower end of body is provided with oil outlet 9, and check valve 8 is equipped with inside oil outlet 9, and check valve 8 includes valve body 801, pressure pin 802, gear Plate 803 and spring 2 804, and pressure pin 802 is connected through baffle 803 with valve body 801, baffle 803 is located inside valve body 801, And it is provided with spring 2 804 below baffle 803, effectively oil liquid can be avoided to flow back when the device is closed, corollary equipment is made At influence, oil inlet 12 is provided on the right side of the pump housing 1, and oil inlet 12 is located at 2 lower right-hand side of wobbler shaft.

Working principle: when using the reciprocating Small Plunger Pump, firstly, should be carried out to the structure of whole device simple Understanding, later when be located at 1 cavity of the pump housing in the middle part of wobbler shaft 2 rotate when, be able to drive thrust bearing 3 rotation, due to thrust It is cam-like configuration outside bearing 3, therefore gradually extends as thrust bearing 3 rotates its outside camber line, so as to by pushes away Dynamic stopper head 4, and then push the plunger 6 being connected through a screw thread with stopper head 4 to move in plunger case 7 and form low pressure chamber, first Steel ball 10 is against inside the pump housing 1, and the second steel ball 11 is open, and then oil is sucked from the external world, so that oil-absorbing process is completed, due to Spring 1 is located at 4 lower section of stopper head, therefore spring 1 is shunk when stopper head 4 is under pressure, when 3 lateral arcs of thrust bearing Thrust bearing 3 reduces the pressure of stopper head 4 when line gradually shortens, and spring 1 extends, and the first steel ball 10 is by oil pressure from the pump housing 1 On push open, since the second steel ball of oil pressure 11 is close to plunger case 7, thus by oily carrying device, oil pressure is by the baffle inside check valve 8 803 push open, so that spring 2 804 compresses, enable oil liquid to be sent device, here it is the whole of the reciprocating Small Plunger Pump A course of work.

Although the utility model is described in detail with reference to the foregoing embodiments, come for those skilled in the art Say, it is still possible to modify the technical solutions described in the foregoing embodiments, or to part of technical characteristic into Row equivalent replacement, within the spirit and principle of the utility model, any modification, equivalent replacement, improvement and so on should all It is included within the scope of protection of this utility model.

Claims (5)

1. a kind of reciprocating Small Plunger Pump, including the pump housing (1) and plunger (6), it is characterised in that: in the pump housing (1) cavity Portion is equipped with wobbler shaft (2), and wobbler shaft (2) lower end is provided with thrust bearing (3), and plunger (6) upper end is fixed with spring One (5), and be provided with thrust bearing (3) above spring one (5), the plunger (6) runs through spring one (5) and plunger case (7) phase Connection, and spring one (5) is located at below stopper head (4), the pump housing (1) the inside left lower end is equipped with plunger case (7), and column It is provided with the second steel ball (11), is equipped with the first steel ball (10) below the plunger case (7), and the first steel ball on the right side of plug cylinder (7) (10) lower section is fixed with oil outlet (9), and the pump housing (1) lower end is provided with oil outlet (9), and is equipped with inside oil outlet (9) Check valve (8), the pump housing (1) right side is provided with oil inlet (12), and oil inlet (12) is located at wobbler shaft (2) lower right-hand side.

2. a kind of reciprocating Small Plunger Pump according to claim 1, it is characterised in that: thrust bearing (3) shape For cam-like structure.

3. a kind of reciprocating Small Plunger Pump according to claim 1, it is characterised in that: stopper head (4) upper end is Convex structure, and the upper end convex structure width is equal with thrust bearing (3) profile cams shape structure width, and stopper head It (4) is helicitic texture outside lower end.

4. a kind of reciprocating Small Plunger Pump according to claim 1, it is characterised in that: the plunger (6) uses PCTFE Material, and be helicitic texture inside the upper end, and plunger (6) holds internal threading arrangement and stopper head (4) lower end external screw-thread Structure matches.

5. a kind of reciprocating Small Plunger Pump according to claim 1, it is characterised in that: the check valve (8) includes valve Body (801), pressure pin (802), baffle (803) and spring two (804), and pressure pin (802) is through baffle (803) and valve body (801) It is connected, it is internal that baffle (803) is located at valve body (801), and is provided with spring two (804) below baffle (803).