CN106640573A

CN106640573A - Medical pressure-stabilizing pump

Info

Publication number: CN106640573A
Application number: CN201710087499.8A
Authority: CN
Inventors: 罗凤玲
Original assignee: Huizhou Science And Technology Co Ltd
Current assignee: Huizhou best medical Co., Ltd.
Priority date: 2016-09-27
Filing date: 2017-02-17
Publication date: 2017-05-10
Anticipated expiration: 2037-02-17
Also published as: WO2018058755A1; CN106640573B

Abstract

The invention relates to a medical pressure-stabilizing pump. The medical pressure-stabilizing pump comprises a pump body, a first flow channel conversion element, a second flow channel conversion element, a check valve and a switchover valve, wherein the pump body is provided with a first fluid inlet-outlet, a second fluid inlet-outlet and two piston cavities, the first fluid inlet-outlet and the second fluid inlet-outlet communicate with the two piston cavities respectively, and piston structures are arranged in the two piston cavities respectively; the first flow channel conversion element communicates with the first fluid inlet-outlet; the second flow channel conversion element is arranged oppositely to the first flow channel conversion element and communicates with the second fluid inlet-outlet; the check valve is connected with the first flow channel conversion element and the second flow channel conversion element, and communicates with the first fluid inlet-outlet and the second fluid inlet-outlet through the first flow channel conversion element and the second flow channel conversion element; and the switchover valve is arranged at one side of the check valve and connected with the first flow channel conversion element and the second flow channel conversion element, and communicates with the first fluid inlet-outlet and the second fluid inlet-outlet through the first flow channel conversion element and the second flow channel conversion element.

Description

A kind of medical stabilized pressure pump

Technical field

The present invention relates to a kind of pump technical field, more particularly to a kind of medical stabilized pressure pump.

Background technology

Medical water jet is that one kind carries out selective cutting using high pressure water jet to tissue, can accurately be protected Blood vessel, nerve, realize minimally invasive surgical device, and medical water jet has been widely used in traumatic surgery, ear nose larynx In the surgical operations such as section's operation, oral maxillofacial surgery.High-pressure pump is one of core of medical water jet design, and high-pressure pump includes Single-piston chamber and double-piston chamber, commonly use at present the high-pressure pump in double-piston chamber, and the switching in double-piston chamber is by solenoid electric valve etc. Device realizing, complex structure, high cost.Furthermore, when this kind of high-pressure pump is used for Medical Devices, accumulator, solenoid electric valve It is difficult to realize sterilizing Deng these devices, it is difficult to meet the requirement of medical aseptic, the part of wherein solenoid electric valve is also possible to Interference is produced to the implanted electronic equipment of patient.

The content of the invention

For deficiency of the prior art, it is an object of the invention to provide a kind of medical stabilized pressure pump.

In order to solve above-mentioned technical problem, this application discloses a kind of medical stabilized pressure pump, it is characterised in that include：The pump housing, With first fluid gateway, second fluid gateway and two plunger shafts, the first fluid gateway and second fluid go out Entrance is connected respectively with two plunger shafts, and in two plunger shafts piston structure is respectively equipped with；First flow bridgeware, The pump housing is arranged at, and is connected with the first fluid gateway；Second flow channel bridgeware, is arranged at the pump housing, and with The first flow bridgeware is oppositely arranged, and connects with the second fluid gateway；Check valve, connects the first flow Bridgeware and second flow channel bridgeware, and by the first flow bridgeware and second flow channel bridgeware and the first fluid Gateway and second fluid gateway connect；And switching valve, the side of the check valve is arranged at, and connect described first-class Road bridgeware and second flow channel bridgeware, and it is first-class with described by the first flow bridgeware and second flow channel bridgeware Body gateway and second fluid gateway connect.

According to an embodiment of the application, there is above-mentioned first flow bridgeware first fluid to enter passage, first-class Body exit passageway and first fluid Vomitory, the first fluid Vomitory is located at the first fluid and enters passage and the Between one fluid outlet channels, and enter passage and first fluid exit passageway with the first fluid and connect, and with described first Stream socket is connected；There is the second flow channel bridgeware second fluid to enter passage, second fluid exit passageway and second Fluid Vomitory, the second fluid Vomitory is located at the second fluid and enters passage and second fluid exit passageway Between, and connect into passage and second fluid exit passageway with the second fluid, and connect with the first fluid gateway.

According to an embodiment of the application, above-mentioned piston structure includes：Piston rod connector, including connector, sealing Circle and claw structure, the sealing ring is sheathed on the first end of the connector, and the claw structure is arranged at the connection The second end of body, one end of multiple claws of the claw structure connects the second end of the connector, the plurality of card The other end of pawl has respectively grab, the central axis of the corresponding connector of the plurality of grab；And piston rod, it has Convex portion, the convex portion is arranged between the plurality of claw.

According to an embodiment of the application, the outer surface of the first end of above-mentioned connector has annular slot；Institute State the inner surface that sealing ring has ring packing body and annular sealing lip, the ring packing body and there is ring buckle Part, the ring packing body is arranged at the outer surface of the first end, and the loop fasteners are arranged at the annular snap Groove, the first end of the annular sealing lip is fixed on the outside of the ring packing body, and the of the annular sealing lip There is gap between two ends and ring packing body.

According to an embodiment of the application, the centre of the first end of above-mentioned connector has connecting hole, the sealing Circle further includes engaging projection, and the engaging projection is arranged at the medial center of the ring packing body, the ring packing sheet Body is arranged at the outer surface of the first end, and the engaging projection is arranged at the connecting hole.

According to an embodiment of the application, above-mentioned sealing ring has ring packing body and annular sealing lip, described Ring packing body is sheathed on the outer surface of the first end, and the first end of the annular sealing lip is fixed on the ring Shape seal body, has gap between the second end of the annular sealing lip and ring packing body；It further includes block piece, institute The first end that block piece is bolted in the connector is stated, and by laser welding in the first end of the connector, and hide State gap in covert.

According to an embodiment of the application, above-mentioned switching valve includes：Valve body, with the first intake channel, the second import Passage, at least one exit passageway and accommodation space, the accommodation space is located at first intake channel, the second intake channel And at least one between exit passageway, and connect first intake channel, the second intake channel and at least one exit passageway；With And valve core structure, it is arranged at the accommodation space, and correspondence first intake channel and the second intake channel；It is wherein described First intake channel connects the first fluid exit passageway of the first flow bridgeware, and the second intake channel connection is described The second fluid exit passageway of second flow channel bridgeware.

According to an embodiment of the application, above-mentioned valve core structure includes the first valve element and the second valve element, first valve Core correspondence first intake channel, corresponding second intake channel of second valve element.

According to an embodiment of the application, above-mentioned valve core structure also includes spring, and the spring is arranged at described first Valve element and the second valve core chamber.

According to an embodiment of the application, above-mentioned valve core structure also includes pre-pressing spring, and the pre-pressing spring sets First valve element and the second valve core chamber are placed in, the two ends of the pre-pressing spring abut first valve element and the second valve element, First valve element and the second valve element are connected to respectively the side wall of the accommodation space around first intake channel and institute State the side wall of the accommodation space around the second intake channel.

Compared with prior art, the application can be obtained including following technique effect：

The medical stabilized pressure pump of the application has two plunger shafts, and two piston structures in two plunger shafts are in turn in correspondence Plunger shaft in move back and forth, allow the output high-pressure fluid that medical stabilized pressure pump is stable, the pressure for keeping output fluid is maintained Necessarily.

Description of the drawings

Fig. 1 is the stereogram of the medical stabilized pressure pump of the embodiment of the present application one.

Fig. 2 is the assembling figure of the medical stabilized pressure pump of the embodiment of the present application one.

Fig. 3 is the profile of the pump housing of the embodiment of the present application one.

Fig. 4 is the profile of the first flow bridgeware of the embodiment of the present application one.

Fig. 5 is the first profile of the medical stabilized pressure pump of the embodiment of the present application one.

Fig. 6 is the second profile of the medical stabilized pressure pump of the embodiment of the present application one.

Fig. 7 is the use state figure of the check valve of the embodiment of the present application one.

Fig. 8 is the use state figure of the pump housing of the embodiment of the present application one.

Fig. 9 is the second use state figure of the pump housing of the embodiment of the present application one.

Figure 10 is the use state figure of the switching valve of the embodiment of the present application one.

Figure 11 is the 3rd use state figure of the pump housing of the embodiment of the present application one.

Figure 12 is the second use state figure of the switching valve of the embodiment of the present application one.

Figure 13 is the profile of the piston structure of the embodiment of the present application one.

Figure 14 is the profile of the piston rod connector of the embodiment of the present application one.

Figure 15 is the first use state figure of the piston structure of the embodiment of the present application one.

Figure 16 is the second use state figure of the piston structure of the embodiment of the present application one.

Figure 17 is the enlarged drawing of the a-quadrant of Figure 16.

Figure 18 is the 3rd use state figure of the piston structure of the embodiment of the present application one.

Figure 19 is the profile of the piston rod connector of the embodiment of the present application two.

Figure 20 is the profile of the piston rod connector of the embodiment of the present application three.

Figure 21 is the use state figure of the piston structure of the embodiment of the present application three.

Figure 22 is the enlarged drawing in the B regions of Figure 21.

Figure 23 is the profile of the piston structure of the embodiment of the present application four.

Figure 24 is the profile of the switching valve of the embodiment of the present application five.

Figure 25 is the profile of the switching valve of the embodiment of the present application six.

Figure 26 is the profile of the switching valve of the embodiment of the present application seven.

Figure 27 is the profile of the switching valve of the embodiment of the present application eight.

Figure 28 is the profile of the switching valve of the embodiment of the present application nine.

Figure 29 is the profile of the switching valve of the embodiment of the present application ten.

Figure 30 is the profile of the switching valve of the embodiment of the present application 11.

Figure 31 is the profile of the switching valve of the embodiment of the present application 12.

Figure 32 is the profile of the switching valve of the embodiment of the present application 13.

Figure 33 is the profile of the switching valve of the embodiment of the present application 14.

Figure 34 is the profile of the switching valve of the embodiment of the present application 15.

Figure 35 is the profile of the switching valve of the embodiment of the present application 16.

Figure 36 is the profile of the switching valve of the embodiment of the present application 17.

Figure 37 is the profile of the switching valve of the embodiment of the present application 18.

Figure 38 is the profile of the switching valve of the embodiment of the present application 19.

Figure 39 is the profile of the switching valve of the embodiment of the present application 20.

Specific embodiment

Multiple embodiments of the application, as clearly stated, the details in many practices will be disclosed with schema below Will be explained in the following description.It should be appreciated, however, that the details in these practices is not applied to limit the application.Also It is to say, in some embodiments of the application, the details in these practices is non-essential.Additionally, for the sake of to simplify schema, Some known usual structures will illustrate it in simply illustrative mode in the drawings with component.

With regard to its " first " used herein, " second " etc., the meaning of order or cis-position is not especially censured, also non-use To limit the application, it is used for the purpose of distinguishing component or the operation described with constructed term.

Fig. 1, Fig. 2 and Fig. 3 are referred to, it is stereogram, assembling figure and the pump of the medical stabilized pressure pump 1 of the embodiment of the present application one The profile of body 10；As illustrated, the medical stabilized pressure pump 1 of the present embodiment include the pump housing 10, first flow bridgeware 11a, second Runner bridgeware 11b, check valve 12 and switching valve 13.The pump housing 10 has first fluid gateway 101a, second fluid gateway 101b and two plunger shaft 102, first fluid gateway 101a and second fluid gateway 101b respectively with corresponding plunger shaft 102 connections.Each plunger shaft 102 has the accommodating section 102a and displacement section 102b connected with accommodating section 102a, holds Section 102a is put with the first opening 1021 and the second opening 1022, the first opening 1021 with diameter greater than the second opening 1022 Diameter, the space for making accommodating section 102a is gradually-reducing shape.Displacement section 102b has displacement passage 1023, displacement passage 1023 The opening 1022 of one end connection second, its other end is connected with first fluid gateway 101a or second fluid gateway 101b, The diameter of displacement passage 1023 is identical with the diameter of the second opening 1022.Installing piston structure 103 in each plunger shaft 102, Piston structure 103 includes the piston rod 1032 of piston rod connector 1031 and connection piston rod connector 1031.Piston structure 103 Corresponding plunger shaft 102 is inserted from the first opening 1021, its initial position is located at accommodating section 102a.

First flow bridgeware 11a and second flow channel bridgeware 11b are arranged at first fluid gateway 101a and One end of the pump housing 10 of two stream socket 101b, first flow bridgeware 11a and second flow channel bridgeware 11b are respectively communicated with On one stream socket 101a and second fluid gateway 101b, and it is correspondingly arranged.The first flow bridgeware 11a of the present embodiment It is identical with the structure of second flow channel bridgeware 11b, it is following that structure explanation is carried out with first flow bridgeware 11a, see also Fig. 4, it is the profile of the first flow bridgeware 11a of the embodiment of the present application one；As illustrated, first flow bridgeware 11a Body 111a is changed including first flow, there is first flow conversion body 111a first fluid to enter passage 1111a, first-class Body exit passageway 1112a and first fluid Vomitory 1113a, first fluid enters passage 1111a and first fluid outlet is logical Road 1112a is arranged in first flow conversion body 111a, and first fluid Vomitory 1113a is arranged in first flow conversion body 111a, and enter between passage 1111a and first fluid exit passageway 1112a positioned at first fluid, first fluid enters passage 1111a and first fluid exit passageway 1112a is connected with first fluid Vomitory 1113a.Wherein first fluid enters logical The central axis of road 1111a and second fluid exit passageway 1112a is mutual with the central axis of first fluid Vomitory 1113a Vertically.In the same manner, there is second flow channel bridgeware 11b second flow channel to change body 111b, second flow channel conversion body 111b tools There is second fluid to enter passage 1111b, second fluid exit passageway 1112b and second fluid Vomitory 1113b.

Be arranged at first fluid gateway 101a as first flow bridgeware 11a and second flow channel bridgeware 11b and During one end of the pump housing 10 of second fluid gateway 101b, first flow bridgeware 11a and second flow channel bridgeware 11b correspondences set Put, first fluid enters passage 1111a correspondence second fluids and enters passage 1111b, first fluid exit passageway 1112a correspondences the Two fluid outlet channels 1112b, first fluid Vomitory 1113a and second fluid Vomitory 1113b towards the pump housing 10, and It is connected with first fluid gateway 101a and second fluid gateway 101b respectively.

Refer to Fig. 5 in the lump again, it is the first profile of the medical stabilized pressure pump 1 of the embodiment of the present application one；As illustrated, single Include check valve body 121 and two nonreturn valve cores 122 to valve 12, check valve body 121 has the first unidirectional body 1211, second single Body 1213 is entered to body 1212 and fluid, the first unidirectional body 1211, the second unidirectional body 1212 and fluid enter body 1213 are connected, and the first unidirectional body 1211 and the second unidirectional body 1212 are located at the both sides that fluid enters body 1213.Two Nonreturn valve core 122 is respectively arranged in the first unidirectional body 1211 and the second unidirectional body 1212, the nonreturn valve core of the present embodiment 122 is solid sphere, alternatively hollow ball, hollow cylinder, solid cylinder, hollow obform body or solid obform body.Check valve 12 are assembled in first flow bridgeware 11a and second flow channel bridgeware 11b, the connection of the first unidirectional body 1211 of check valve 12 the The first fluid of one runner bridgeware 11a enters passage 1111a, the connection second flow channel of the second unidirectional body 1212 of check valve 12 The second fluid of bridgeware 11b enters passage 1111b.

Now refers in the lump Fig. 6, and it is the second profile of the medical stabilized pressure pump 1 of the embodiment of the present application one；As illustrated, The switching valve 13 of the present embodiment includes valve body 131 and valve core structure 132, and valve body 131 has the first body 1311 and the second body 1312, the both ends of the first body 1311 have respectively the first intake channel 13111 and the second intake channel 13112, its middle part With accommodation space 13113, accommodation space 13113 is located between the first intake channel 13111 and the second intake channel 13112, And be connected with the first intake channel 13111 and the second intake channel 13112.The width W1 of accommodation space 13113 is more than first The width W2 of the intake channel 13112 of intake channel 13111 and second.Second body 1312 has exit passageway 13121, second pipe Body 1312 connects the middle part of the first body 1311, and exit passageway 13121 is connected with accommodation space 13113, exit passageway 13121 Width W1s of the width W3 less than accommodation space 13113.Wherein accommodation space 13113 enters positioned at the first intake channel 13111, second Between mouthful passage 13112 and exit passageway 13121, and for fluid circulation space.

Valve core structure 132 is single valve element 1320, and is arranged in accommodation space 13113.The valve element 1320 of the present embodiment For solid sphere, its diameter less than accommodation space 13113 width W1, and more than the first intake channel 13111 and the second import The width W2 of passage 13112, the path that valve element 1320 can be between the first intake channel of alternate blocker 13111 and exit passageway 13121 With the path between the second intake channel 13112 and exit passageway 13121.

When switching valve 13 is assembled in first flow bridgeware 11a and second flow channel bridgeware 11b, switching valve 13 is arranged at The side of check valve 12, the two ends of the first body 1311 of switching valve 13 are respectively arranged at the first of first flow bridgeware 11a The second fluid exit passageway 1112b of fluid outlet channels 1112a and second flow channel bridgeware 11b, the first of switching valve 13 enters Mouthful passage 13111 is connected with first fluid exit passageway 1112a, the second intake channel 13112 of switching valve 13 and second fluid Exit passageway 1112b is connected.

Fig. 1 and Fig. 2 is referred to again, and the stabilized pressure pump 1 of the present embodiment further includes connector 14, and the two ends of connector 14 are respectively provided with The first connecting hole 1114a and second flow channel bridgeware 11b of body 111a are changed in the first flow of first flow bridgeware 11a Second flow channel change the second connecting hole 1114b of body 111b, reach fixed first flow bridgeware 11a and second flow channel and turn Change the effect of part 11b, it is to avoid first flow bridgeware 11a and second flow channel bridgeware 11b departs from check valve 12 and switching valve 13. The stabilized pressure pump 1 of the present embodiment further includes housing 15, and housing 15 is arranged at the pump housing 10, and accommodating first fluid bridgeware 11a, second Fluid bridgeware 11b, check valve 12, switching valve 13 and connector 14, reach the effect of protection said elements.

Fig. 7 and Fig. 8 is seen also, it is the use state figure and the pump housing 10 of the check valve 12 of the embodiment of the present application one First use state figure；As illustrated, the medical stabilized pressure pump 1 of the present embodiment is when using, the connection check valve of fluid supply channel 2 12 fluid enters body 1213, and fluid flows to the first unidirectional body 1211 and the second uniguide along fluid into body 1213 Body 1212, and separately flow into the first fluid that connects with the first unidirectional body 1211 enter passage 1111a and with the second uniguide The second fluid of the connection of body 1212 enters passage 1111b, then separately flows into first connected into passage 1111a with first fluid The fluid Vomitory 1113a and second fluid Vomitory 1113b connected into passage 1111b with second fluid.Finally flow Body flows into the displacement of two plunger shafts 102 from the first fluid gateway 101a and second fluid gateway 101b of the pump housing 10 respectively In passage 1023.

Now, then in the lump refer to Fig. 9 and Figure 10, its be the second use state figure of the pump housing 10 of the embodiment of the present application one and The use state figure of switching valve 13；As illustrated, the piston structure of the plunger shaft 102 connected with first fluid gateway 101a 103, piston rod 1032 promote piston rod connector 1031 toward first fluid gateway 101a advance when, generation in plunger shaft 102 High pressure, the nonreturn valve core 122 for making check valve 12 closes the first unidirectional body 1211, and fluid will not enter from the first unidirectional body 1211 Enter the plunger shaft 102 connected with first fluid gateway 101a.Institute in the plunger shaft 102 connected with first fluid gateway 101a The high-pressure fluid of generation flows into first fluid Vomitory 1113a from first fluid gateway 101a, then by going out with first fluid The first fluid exit passageway 1112a for entering passage 1113a connections flows into the first intake channel 13111 of switching valve 13.Fluid is past Accommodation space 13113 flows, and promotes valve core structure 132 to move toward the second intake channel 13112.Valve element 1320 is connected to second The side wall 13114 of the accommodation space 13113 around intake channel 13112, and the second intake channel 13112 is blocked, prevent fluid Into the second intake channel 13112, path is formed between such first intake channel 13111 and exit passageway 13121, fluid is from going out Mouth passage 13121 flows out.Fluid exhaust channel 3 connects the second body 1312 of switching valve 13, and connects with exit passageway 13121 Logical, the fluid that exit passageway 13121 is discharged is discharged from fluid exhaust channel 3.Fig. 9 is referred to again, in another plunger shaft 102 The piston rod 1032 of piston structure 103 pulls piston rod connector 1031 to move toward the second opening 1022, shape in this plunger shaft 102 Into low pressure, fluid constantly flows through second fluid into passage 1111b, second from the second unidirectional body 1212 of check valve 12 Body Vomitory 1113b and second fluid gateway 101b enters this plunger shaft 102.

Conversely, referring to Figure 11 and Figure 12 in the lump again, it is the 3rd use state figure of the pump housing 10 of the embodiment of the present application one And the second use state figure of switching valve 13；As illustrated, when in the plunger shaft 102 connected with second fluid gateway 101b Piston rod 1032 promotes piston rod connector 1031 toward second fluid gateway 101b movements, the fluid shape in this plunger shaft 102 Into high-pressure fluid, the nonreturn valve core 122 of check valve 12 closes the second unidirectional body 1212, fluid is not flowed into again single with second To the plunger shaft 102 of the connection of body 1212.High-pressure fluid in this plunger shaft 102 by second fluid gateway 101b, second Fluid Vomitory 1113b and second fluid exit passageway 1112b flows into the second intake channel 13112 of switching valve 13.Now Fluid is passed through from the second intake channel 13112, fluid forces valve element 1320 is moved toward the first intake channel 13111, valve element 1320 The side wall 13114 of the accommodation space 13113 being connected to around the first intake channel 13111, makes the second intake channel 13112 and goes out Path is formed between mouth passage 13113, fluid flows out from exit passageway 13113, and from the fluid row connected with exit passageway 13113 Go out pipeline 3 to discharge, and will not flow out from the first intake channel 13111.Piston rod 1032 in another plunger shaft 102 is pulled lives Stopper rod connector 1031 is moved toward the second opening 1022, its internal generation low pressure, and fluid is constantly from the first list of check valve 12 Enter into passage 1111a, first fluid Vomitory 1113a and first fluid gateway 101a to body 1211, first fluid Enter the plunger shaft 102 connected with first fluid gateway 101a.

When the piston structure 103 in each plunger shaft 102 moves back and forth, each plunger shaft 102 is supplied in turn High-pressure fluid is answered, stable high-pressure fluid output is realized.Above-mentioned valve element 1321 be solid sphere, the first intake channel 13111 and The side wall 13114 of the accommodation space 13113 around the second intake channel 13112 be inclined-plane, the import of such valve element 1321 and first When the side wall 13114 of the accommodation space 13113 around the intake channel 13112 of passage 13111 or second is abutted, the table of valve element 1320 Face is tangent with side wall 13114, makes seamless between valve element 1320 and side wall 13114, and fluid will not be from valve element 1320 and side wall 13114 Between flow into and flow out from the first intake channel 13111 or the second intake channel 13112, it is ensured that fluid is completely from the first intake channel 13111 paths formed with exit passageway 13121 or the second intake channel 13112 are logical with what exit passageway 13121 was formed Road is flowed out, and reduces fluid loss rate.The valve element 1320 of the present embodiment also can use solid cylinder, the effect that it reaches with it is above-mentioned It is identical, repeat no more in this.

Figure 13 is referred to, it is the profile of the piston structure 103 of the embodiment of the present application one；As illustrated, the present embodiment Piston rod connector 1031 include connector 1033, sealing ring 1034 and claw structure 1035, connector 1033 include first End 10331 and the second end 10332, sealing ring 1034 is sheathed on first end 10331, and claw structure 1035 is arranged at second End 10332, and with multiple claws 10351, one end connection the second end 10332 of multiple claws 10351, multiple claws 10351 other end is from the direction of the past the second end 10332 away from connector 1033 of the second end 10332 of connector 1033 Extend.The end face 10333 of the second end 10332 of the connector 1033 of the present embodiment has arc groove 10334, multiple claws 10351 inner side has respectively arc groove 10352, and the other end in multiple claws 10351 forms respectively grab 10353, The central axis of the correspondence connector 1033 of grab 10353 of each claw 10351.Piston rod 1032 has spherical elevation 10321, the arc groove 10352 of the arc groove 10334 of end face 10333 and each claw 10351 accommodates spherical elevation The bottom surface of the arc groove 10334 of 10321, i.e. end face 10333 and the arc groove 10352 of each claw 10351 with it is spherical The correspondence of surface 10322 of convex portion 10321, when spherical elevation 10321 is arranged at claw structure 1035, spherical elevation 10321 The arc groove 10334 and the arc groove of each claw 10351 of the end face 10333 of surface 10322 and the second end 10332 10352 bottom surface laminating, increases the adaptability of piston structure 103.

Figure 14 is seen also, it is the profile of the piston rod connector 1031 of the embodiment of the present application one；As illustrated, The connector 1033 of the piston rod connector 1031 of the present embodiment is with more connection first end 10331 and the second end 10332 Middle part 10335, the external diameter of first end 10331 and the second end 10332 less than middle part 10335 external diameter, connector 1033 First end 10331 outer surface 10336 have annular slot 10337.The outer surface 10338 of the second end 10332 With annular slot 10339.

Sealing ring 1034 is sheathed on the outer surface 10336 of first end 10331, and sealing ring 1034 has ring packing sheet Body 10341 and annular sealing lip 10342, ring packing body 10341 has closing top surface 10343 and is arranged at closing top surface 10343 annular sidewall 10344, the inner side of annular sidewall 10344 is provided with loop fasteners 10345.Annular sealing lip 10342 has There are first end 10342a and the second end 10342b, its first end 10342a is arranged at the annular sidewall of ring packing body 10341 10344 outside, and for fixing end；Its second end 10342b be free end, the second end 10342b of annular sealing lip 10342 There is gap 10346, the second end of annular sealing lip 10342 between the annular sidewall 10344 of ring packing body 10341 External diameter of the external diameter of 10342b more than the middle part 10335 of connector 1033.When 10341 sets of the ring packing body of sealing ring 1034 Located at the outer surface 10336 of first end 10331 when, the loop fasteners 10345 of sealing ring 1034 are mounted on connector 1033 Annular slot 10337.Sealing ring 1034 is arranged at the snap fit of annular slot 10337 by loop fasteners 10345, consolidates Ground fixed seal ring 1034 is in the first end 10331 of connector 1033.

Claw structure 1035 is arranged at the second end 10332 of connector 1033, and relative with sealing ring 1034.Claw is tied Structure 1035 also includes annular engaging body 10354, and the medial surface 10355 of annular engaging body 10354 has annular male member 10356, first end 10351a of multiple claws 10351 is connected to annular engaging body 10354, and annular space is arranged, Its second end 10351b extends toward the direction away from annular engaging body 10354, and forms free end, multiple claws 10351 The external diameter that second end 10351b is formed is outer more than the second end 10342b's of the annular sealing lip 10342 of sealing ring 1034 Footpath.When claw structure 1035 is arranged at the second end 10332 of connector 1033, annular engaging body 10354 is arranged at the The outer surface 10338 of two ends 10332, the annular male member 10356 of annular engaging body 10354 is arranged in annular slot 10339, multiple claws 10351 are located at the side of the second end 10332 of connector 1033.Claw structure 1035 is because of its convex annular Part 10356 is arranged in the annular slot 10339 of the second end 10332 of connector 1033, effectively prevents claw structure 1035 It is disconnected body 1033.

Above-mentioned connector 1033 be metal material, above-mentioned claw structure 12 be elastic construction, multiple claws 122 can gather and Open, the material of above-mentioned sealing ring 1034 and claw structure 1035 uses elastic material, elastic material to be PTFE, PPSU, gather Ether ether ketone (PEEK), modified polyetheretherketonefiber, PE, PP or PVC.Sealing ring 1034 and the flexible of claw structure 1035.This reality The preparation method for applying the piston rod connector 1031 of example, first carries out injection mo(u)lding or compression molding by mold insert of connector 1033, Claw structure 1035 is formed in the second end 10332 of connector 1033.Sealing ring 1034 is sheathed on again the of connector 1031 The fixed form of the outer surface 10336 of one end 10331, sealing ring 1034 and claw structure 1035 and connector 1033 is in upper State and stated clearly, repeat no more in this.The preparation method that the present embodiment is provided mainly is assembled in connector in sealing ring 1034 The injection mo(u)lding of the second end 10332 or compression molding claw structure before 1033 first end 10331, prior to connector 1033 1035, can so avoid the performance of the high temperature impact sealing ring 1034 of injection mo(u)lding or compression molding.

See also Figure 15 to Figure 18, its be the piston structure 103 of the embodiment of the present application one the first use state figure, The enlarged drawing of the a-quadrant of the second use state figure, the 3rd use state figure and Figure 16；As illustrated, piston rod connector 1031 Piston rod 1032 is first arranged at, the spherical elevation 10321 of piston rod 1032 is arranged at claw structure 1035, i.e., positioned at multiple claws Between 10351.Now piston rod connector 1031 is arranged at accommodating section 102a, its sealing ring 1034 towards second opening 1022, Its claw structure 1035 towards first opening 1021, as shown in figure 16.Piston rod 1032 promotes piston rod connector 1031, piston Bar connector 1031 enters the displacement passage 1023 of displacement section 102b.When piston rod connector 1031 enters displacement passage 1023 When, the external diameter of the second end 10342b of the annular sealing lip 10342 of sealing ring 1034 is more than the internal diameter of displacement passage 1023, ring Second end 10342b of shape sealed lip 10342 is connected to the side wall 10231 of displacement passage 1023.When fluid is entered from the pump housing 10 During displacement passage 1023, fluid is entered between the second end 10342b of ring packing body 10341 and annular sealing lip 10342 Gap 10346, the second end 10342b of fluid forces annular sealing lip 10342, and make the second of annular sealing lip 10342 End 10342b is connected to the side wall 10231 of displacement passage 1023.Piston rod connector 1031 moves back and forth in displacement passage 1023 Interior, the second end 10342b of annular sealing lip 10342 is persistently connected to the side wall 10231 of displacement passage 1023, makes annular close Seamless between the second end 10342b of envelope lip 10342 and the side wall 10231 of displacement passage 1023, fluid will not be from ring packing Leak between the side wall 10231 of lip 10342 and displacement passage 1023, fully seal displacement passage 1023.

The external diameter that second end 10351b of multiple claws 10351 of claw structure 1035 is formed is more than displacement passage 1023 Internal diameter, when piston rod connector 1031 enter displacement passage 1023 when, because claw structure 12 be elastic construction, multiple claws 10351 the second end 10351b gathers inside, when the spherical elevation 10321 of piston rod 1032 is arranged between multiple claws 10351, It is close to the arc groove of the end face 10333 of the second end 10332 of connector 1033 in the surface 10322 of spherical elevation 10321 10334 and each claw 10351 arc groove 10352 bottom surface, such piston rod 1032 promote piston rod connector When 1031, the spherical elevation 10321 of piston rod 1032 equably promotes the end face of the second end 10332 of connector 1033 10333, it is to avoid piston rod connector 1032 allows piston rod connector 103 smoothly to move in the bias internal of displacement passage 1023 In displacement passage 1023.When piston rod connector 1031 will toward second opening 1022 move when, multiple claws 10351 it is multiple Grab 10353 is connected to the surface 10322 of the spherical elevation 10321 of piston rod 1032, i.e., positioned at each top of grab 10353 Arc groove 10352 bottom surface be close to piston rod 1032 spherical elevation 10321 surface 10322, such fixed piston The spherical elevation 10321 of bar 1032 between multiple claws 10351, prevent piston rod 1032 pull piston rod connector 1031 when, The spherical elevation 10321 of piston rod 1032 departs between multiple claws 10351.

Embodiment two to example IV provides different piston structures 103, in following detailed description：

Embodiment two

Figure 19 is referred to, it is the profile of the piston rod connector 1031 of the embodiment of the present application two；As illustrated, this reality Apply example piston rod connector 1031 it is different from the piston rod connector of a upper embodiment be, the connector 1033 of the present embodiment The centre of first end 10331 there is connecting hole 1036, connecting hole 1036 has the first engaging hole 1036a and connection first The second engaging hole 1036b of engaging hole 1036a, the first engaging first ends 10331 of the hole 1036a from connector 1033 Top surface 1033a extend toward middle part 10335, the second engaging hole 1036b is located at the first engaging hole near middle part 10335 One end of 1036a, the aperture of the second engaging hole 1036b engages the aperture of hole 1036a more than first.

The medial center of the closing top surface 10343 of the ring packing body 10341 of sealing ring 1034 is provided with engaging projection 1037, engaging projection 1037 includes fixed column 10371 and engaging protuberances 10372, and fixed column 10371 is arranged at closing top surface 10343, engaging protuberances 10372 are arranged at the fixed column 10371 of the closing top surface 10343 away from ring packing body 10341 One end, the external diameter of engaging protuberances 10372 is more than the external diameter of fixed column 10371.When the ring packing body 10341 of sealing ring 1034 When being sheathed on the outer surface 10336 of first end 10331, engaging projection 1037 is arranged at connecting hole 1036, fixed column 10371 In the first engaging hole 1036a of connecting hole 1036, engaging protuberances 10372 are located at the second engaging hole of connecting hole 1036 In 1036b, the external diameter of engaging protuberances 10372 engages the internal diameter of hole 1036a more than first, prevents from engaging projection 1037 from engaging Hole 1036 departs from.

Embodiment three

Figure 20 is referred to, it is the profile of the piston rod connector 1031 of the embodiment of the present application three；As illustrated, this reality The structure for applying the sealing ring 1034 of the piston rod connector 1031 of example is different from the structure of the sealing ring of above-described embodiment, separately more sets Have block piece 1038, thus the structure of the first end 10331 of the connector 1033 of the present embodiment also with the company of above-described embodiment The structure of the first end of junctor is different.The centre of the first end 10331 of the connector 1033 of the present embodiment has screwed hole 10330.Sealing ring 1034 is sheathed on the outer surface 10336 of first end 10331, and sealing ring 1034 has ring packing body 10341 and annular sealing lip 10342, first end 10342a of annular sealing lip 10342 is arranged at ring packing body 10341, its second end 10342b are free end, and have gap 10346, annular seal lip between ring packing body 10341 External diameter of the external diameter of the second end 10342b in portion 10342 more than the middle part 10335 of connector 1033.Block piece 1038 has baffle plate 10381 and the engaging post 10382 of the side of baffle plate 10381 is arranged at, engaging post 10382 has and the corresponding spiral shell of screwed hole 10330 Line 10383, the screw thread 10383 of the engaging post 10382 of block piece 1038 and the screwed hole of the first end 10331 of connector 1033 10330 are spirally connected, while baffle plate 10381 to block piece 1038 and carrying out Laser Welding between the first end 10331 of connector 1033 Connect, allow block piece 1038 to be fixed on the first end 10331 of connector 1033, be also avoided that block piece 1038 is disconnected body 1033, while the baffle seal circle 1034 of block piece 1038, prevents sealing ring 1034 to be disconnected body 1033.The gear of block piece 1038 The external diameter of plate 10381 is more than the external diameter of the ring packing body 10341 of sealing ring 1034, and less than annular sealing lip 10342 The second end 10342b external diameters, make baffle plate 10381 masking be located between annular sealing lip 10342 and ring packing body 10341 Gap 10346, between the bottom surface of another baffle plate 10381 and the top of annular sealing lip 10342 have lateral breach 10347, side The fluid passage of bending is connected and is formed with gap 10346 to breach 10347.

Figure 21 and Figure 22 is seen also, it is the use state figure and figure of the piston structure 103 of the embodiment of the present application three The enlarged drawing in 22 B regions；As illustrated, when piston rod connector 1031 enters the displacement passage of the plunger shaft 102 of the pump housing 10 1023, fluid enters fashionable from the other end of displacement passage 1023, positioned at ring packing body 10341 and annular sealing lip Side wall 10231 of the guiding fluid of baffle plate 10381 before gap 10346 between 10342 first toward displacement passage 1023 flows, fluid stream To baffle plate 10381 outer rim and along its outer rim enter ring packing body 10341 and annular seal lip from lateral breach 10347 Gap 10346 between portion 10342, and above-mentioned effect is reached, can so avoid fluid from directly impacting the annular of sealing ring 1034 Sealed lip 10342, it is to avoid cause annular sealing lip 10342 to damage.

The preparation method of the piston rod connector 1031 of the present embodiment, sealing ring 1034 is first sheathed on the of connector 1033 The outer surface 10336 of one end 10331, now block piece 1038 is mounted on the first end 10331 of connector 1033, and to resistance The first end 10331 of block piece 1038 and connector 1033 carries out laser welding, and constant resistance part 1038 is in connector 1033.Most Afterwards injection mo(u)lding or compression molding are carried out as mold insert with the connector 1033 for being provided with sealing ring 1034 and block piece 1038, form card Pawl structure 1035 is in the second end 10332 of connector 1033.

Example IV

Figure 23 is referred to, it is the profile of the piston structure 103 of the embodiment of the present application four；As illustrated, the present embodiment Piston structure 103 it is different from the piston structure of embodiment one be, piston rod 1032 have convex portion 10323, its convex portion 10323 Top surface 10324 be plane, correspondence convex portion 10323 top surface 10324 connector 1033 the second end 10332 end face 10333 is plane.The bottom surface 10325 of the convex portion 10323 of piston rod 1032 is inclined-plane, the convex portion 10323 of corresponding piston rod 1032 Bottom surface 10325 multiple grabs 10353 surface 10357 be inclined-plane.When piston rod 1032 pulls piston rod connector 1031 When mobile, multiple grabs 10353 of multiple claws 10351 are connected to the bottom surface 10325 of the convex portion 10323 of piston rod 1032, right It is close to the convex portion 10323 of piston rod 1032 in the surface 10357 for answering multiple grabs 10353 of the bottom surface 10325 of convex portion 10323 Bottom surface 10325, the convex portion 10323 of such fixed piston rod 1032 prevents piston rod 1032 from pulling and lives between multiple claws 10351 During stopper rod connector 1031, the convex portion 10323 of piston rod 1032 departs between multiple claws 10351.

The knot of the end face 10333 of the second end 10332 of the connector 1033 of the piston rod connector 1031 of the present embodiment Structure can be applicable to the piston structure of embodiment one to embodiment three with the structure of the convex portion 10323 of piston rod 1032, in this no longer Repeat.

Following embodiments disclose the switching valve of different structure, in following detailed description：

Embodiment five

Figure 24 is referred to, it is the profile of the switching valve 13 of the embodiment of the present application five；As illustrated, the valve of the present embodiment Cored structure 132 has the first valve element 1321 and the second valve element 1322, and the first valve element 1321 and the second valve element 1322 are located at accommodating sky Between in 13113, the first intake channel 13111 of correspondence of the first valve element 1321, the second intake channel of correspondence of the second valve element 1322 13112.When fluid is flowed in accommodation space 13113 from the first intake channel 13111 or the second intake channel 103112, fluid Promote the first valve element 1321 or the second valve element 1322 to move toward the second valve element 1322 or the first valve element 1321, and promote the second valve element 1322 or first valve element 1321 move toward the second intake channel 13112, be connected to the second valve element 1322 or the first valve element 1321 The side wall 13114 of the accommodation space 13113 around the second intake channel 13112 or the first intake channel 13111, and make first to enter The intake channel 13112 of mouth passage 13111 or second forms path with exit passageway 13113, can so shorten each valve element Shift motion, lifts the switching efficiency of switching valve 13.

Embodiment six

Figure 25 is referred to, it is the profile of the switching valve 13 of the embodiment of the present application six；As illustrated, the valve of the present embodiment Cored structure 132 is arranged in accommodation space 13113, and including the first valve element 1321, the second valve element 1322 and spring 1323, spring 1323 two ends the first valve element 1321 of connection and the second valve element 1322, the first intake channel 13111 of correspondence of the first valve element 1321, the The second intake channel 13112 of correspondence of two valve element 1322.

The valve core structure 132 of the switching valve 13 of the present embodiment is by the first intake channel 13111 or the second intake channel 13112 fluid forces for entering, valve core structure 132 can rapidly close the first intake channel 13111 or the second intake channel 13112, make the second intake channel 13112 or the first intake channel 13111 and exit passageway 13121 form path, fluid is from going out Mouth passage 13121 flows out.Fluid stops entering the first intake channel 13111 or the second intake channel 13112, that is, stop promoting valve Cored structure 132, spring 1323 compressed in valve core structure 132 is released, and rapidly drives the first valve element 1321 and the second valve Core 1322 returns to respectively second intake channel of position and blocking of the first intake channel of blocking 13111 and exit passageway 13121 13112 with the position of exit passageway 13121, also mean that valve core structure 132 can automatically reset, it is to avoid in exit passageway 13121 Fluid reflux to the first intake channel 13111 or the second intake channel 13112.Also illustrate that valve core structure 132 can be quick in addition Ground switching state, after fluid approach axis change, does not occur to be needed the flow of lifting fluid by the problem of the blocking of valve core structure 132 Or pressure, the consumption of the energy is effectively reduced, lift the switching efficiency of switching valve 13.

Embodiment seven

Figure 26 is referred to, it is the profile of the switching valve 13 of the embodiment of the present application seven；As illustrated, the present embodiment is cut Change that valve 13 is different from the switching valve of embodiment six to be, the first valve element 1321 of the valve core structure 132 of the present embodiment, the second valve element 1322 and spring 1323 be separately positioned in accommodation space 13113, spring 1323 is arranged at the first valve element 1321 and the second valve element Between 1322.The valve core structure 132 of the present embodiment is different from the valve core structure 132 of embodiment six, but also can reach and embodiment Six identicals are acted on.

Embodiment eight

Figure 27 is referred to, it is the profile of the switching valve 13 of the embodiment of the present application eight；As illustrated, the present embodiment is cut Change that valve 13 is different from the switching valve 13 of embodiment six to be, the spring of embodiment one changes pre-pressing spring 1323a into, when this enforcement When the valve core structure 132 of example is arranged at the accommodation space 13113 of valve body 131, pre-pressing spring 1323a launches and promotes the first valve The valve element 1322 of core 1321 and second, makes the first valve element 1321 and the second valve element 1322 be connected to the first intake channel 13111 respectively The side wall of the accommodation space 13113 around the intake channel 13112 of side wall 13114 and second of the accommodation space 13113 of surrounding 13114.When switching valve 13 is not used, the first valve element 1321 and the second valve element 1322 have been completely enclosed and accommodation space First intake channel 13111 of 13113 connections and one end of the second intake channel 13112, a small amount of fluid cannot be from the first import The intake channel 13112 of passage 13111 and second enters accommodation space 13113.The pre-pressing spring 1323a of the present embodiment can also Replace the spring of embodiment seven, repeat no more in this.

Embodiment nine

Figure 28 is referred to, it is the profile of the switching valve 13 of the embodiment of the present application nine；As illustrated, the present embodiment is cut Change that valve 13 is different from the switching valve of above-described embodiment to be, first valve element 1321 of above-described embodiment and the second valve element 1322 are real Bulbus cordis body, first valve element 1321 of the present embodiment and the second valve element 1322 are hollow ball, so mitigate the first valve element 1321 and The weight of the second valve element 1322, increases the translational speed of valve core structure 132.First valve element 1321 and second of certain the present embodiment Valve element 1322 is alternatively hollow cylinder, repeats no more in this.

Embodiment ten and embodiment 11

Figure 29 and Figure 30 is referred to, it is the profile of switching valve 13 of the embodiment of the present application ten and cutting for embodiment 11 Change the profile of valve 13；As illustrated, the switching valve of the switching valve 13 of embodiment ten and embodiment 11 and above-described embodiment is not Same is that first valve element 1321 and the second valve element 1322 of the valve core structure 132 of embodiment ten and embodiment 11 is respectively different Body, the first valve element 1321 of embodiment ten and the second valve element 1322 are solid obform body, the first valve element of embodiment 11 1321 and second valve element 1322 be symmetrical for the two sides of the obform body of hollow obform body, embodiment ten and embodiment 11 Cambered surface, i.e., the solid obform body and hollow obform body with cambered surface, the side of the first valve element 1321 cambered surface correspondence the first import Passage 13111, cambered surface second intake channel 13112 of correspondence of the side of the second valve element 1322.Certainly obform body can be other forms, If it is cambered surface near the side of the first intake channel 13111 or the second intake channel 13112, and can be in accommodation space Move in 13113.

The side of the first valve element 1321 of the side of first intake channel of correspondence 13111 of above-described embodiment is cambered surface, right The side for answering the second valve element 1322 of the second intake channel 13112 is cambered surface, and the cambered surface of the first valve element 1321 is connected to as inclined-plane Accommodation space 13113 side wall 13114, cambered surface and side wall 13114 are tangent and close the first intake channel 13111；In the same manner, The cambered surface of two valve elements 1322 is connected to the side wall 13114 of the accommodation space 13113 for inclined-plane, cambered surface it is tangent with side wall 13114 and Close the second intake channel 13112.

Embodiment 12 and embodiment 13

Figure 31 and Figure 32 is referred to, it is the profile and embodiment 13 of the switching valve 13 of the embodiment of the present application 12 The profile of switching valve 13；As illustrated, the switching of the switching valve 13 of embodiment 12 and embodiment 13 and above-described embodiment The difference of valve 13 is, first valve element 1321 and the second valve element 1322 of the valve core structure 132 of embodiment 12 and embodiment 13 Respectively cylinder, the first valve element 1321 of embodiment 12 and the second valve element 1322 are solid cylinder, the first of embodiment 13 The valve element 1322 of valve element 1321 and second is hollow cylinder.In embodiment 12 and embodiment 13, the first intake channel of correspondence The side of 13111 the first valve element 1321 is vertical plane, so the accommodation space 13113 of correspondence the first valve element 1321 side Side wall 13114 is also vertical plane, when the first valve element 1321 is connected to the side wall 13114 of accommodation space 13113, the first valve element 1321 is completely closely sealed with the side wall 13114 of accommodation space 13113, reaches the effect of the first intake channel 13111 of closing；In the same manner , in embodiment 12 and embodiment 13, the side of the second valve element 1322 of the second intake channel 13112 of correspondence is also vertical Plane, the side wall 13114 of the accommodation space 13113 of correspondence the second valve element 1322 side is also vertical plane, when the second valve element 1322 be connected to accommodation space 13113 side wall 13114 when, the second valve element 1322 is complete with the side wall 13114 of accommodation space 13113 It is complete closely sealed, reach the effect of the second intake channel 13112 of sealing.3rd valve element of certain embodiment 12 and embodiment 13 1321 and second valve element 1322 can be obform body, as long as correspondence the first intake channel 13111 the first valve element 1321 side and The side of the second valve element 1322 of the second intake channel 13112 of correspondence is vertical plane, that is to say, that the first valve element 1321 and the Two valve elements 1322 can be the solid obform body with vertical plane or hollow obform body, the first valve element 1321 and the second valve element 1322 Can move in accommodation space 13113.

Above-described embodiment nine discloses the variform of valve element to embodiment 12, and it can be applicable to embodiment one, implements The switching valve 13 of example five to embodiment eight, repeats no more in this.

Embodiment 14

Figure 33 is referred to, it is the profile of the switching valve 13 of the embodiment of the present application 14；As illustrated, the present embodiment Switching valve 13 is different from the switching valve of above-described embodiment to be, second body 1312 of above-described embodiment is perpendicular to the first body 1311, relative first body 1311 of the second body 1312 of the valve body 131 of the present embodiment inclines an angle.

Embodiment 15

Figure 34 is referred to, it is the profile of the switching valve 13 of the embodiment of the present application 15；As illustrated, the present embodiment Valve body 131 has two the second bodys 1312, and two the second bodys 1312 are respectively arranged at the both sides of the first body 1311, two Two exit passageways 13121 of the second body 1312 are connected with accommodation space 13113.When the switching valve 13 of the present embodiment is in using When, fluid is entered from the first intake channel 13111, and fluid forces valve core structure 132 is moved toward the second intake channel 13112, is made The accommodation space 13113 being connected near the second valve element 1322 of the second intake channel 13112 around second intake channel 13112 Side wall 13114, close the second intake channel 13112.Simultaneously the first valve element 1321 is continued toward the second valve element by fluid thrust 1322 extruding, make the first intake channel 13111 and two exit passageways 13121 form path, and fluid is simultaneously logical from two outlets Flow out in road 13121.In the same manner, fluid is entered from the second intake channel 13112, and valve core structure 132 is toward the first intake channel 13111 It is mobile, and the first intake channel 13111 is closed, and allow the second intake channel 13112 and two exit passageways 13121 to form logical Road, allows the fluid that the second intake channel 13112 is entered to flow out from two exit passageways 13121, and such fluid can be simultaneously from two Exit passageway 13121 flows out, and reaching increases the effect of fluid output speed.

Two second bodys 1312 of the present embodiment are respectively perpendicular to the first body 1311, certain two the second bodys 1312 Also respectively an angle can be inclined with respect to the first body 1311, is repeated no more in this.

Embodiment 16

Figure 35 is referred to, it is the profile of the switching valve 13 of the embodiment of the present application 16；As illustrated, the present embodiment Valve body 131 further includes movably connecting pipe 1313, and movably connecting pipe 1313 is arranged at the first intake channel of the first body 1311 13111, the passage 13131 of movably connecting pipe 1313 forms new intake channel, and passage 13131 is connected with accommodation space 13113. Movably connecting pipe 1313 can for example make according to the first intake channel 13111 of the requirement groups of user loaded on the first body 1311 User needs the passage with less width, now may be selected for the movably connecting pipe 1313 for meeting user's demand to be assembled in the First intake channel 13111 of one body 1311；When user wants to use the first intake channel 13111 of script, user Directly movably connecting pipe 1313 is unloaded from the first intake channel 13111 of the first body 1311.User is intended to change second and The width of mouthful passage 13112 or exit passageway 13121, also may be selected in the first body 1311 the second intake channel 13112 or The exit passageway 13121 of the second body 1312 arranges movably connecting pipe 1313.

Embodiment 17

Figure 36 is referred to, it is the profile of the switching valve 13 of the embodiment of the present application 17；As illustrated, the present embodiment Valve body 131 further includes two movably connecting pipes 1313, and two movably connecting pipes 1313 are respectively arranged at the of the first body 1311 One intake channel 13111 and the second intake channel 13112.Certainly also dependent on user demand by two movably connecting pipes The exit passageway 13121 or setting of 1313 the first intake channels 13111 for being arranged at the first body 1311 and the second body 1312 In second intake channel 13112 and the exit passageway 13121 of the second body 1312 of the first body 1311.

Embodiment 18

Figure 37 is referred to, it is the profile of the switching valve 13 of the embodiment of the present application 18；As illustrated, the present embodiment Valve body 131 further includes three movably connecting pipes 1313, and three movably connecting pipes 1313 are respectively arranged at the of the first body 1311 The exit passageway 13121 of one intake channel 13111, the second intake channel 13112 of the first body 1311 and the second body 1312.

Embodiment 19

Figure 38 is referred to, it is the profile of the switching valve 13 of the embodiment of the present application 19；As illustrated, above-described embodiment The movably connecting pipe 1313 of 10 six to embodiments 18 is directly inserted in the first intake channel 13111, the second intake channel 13112 Or exit passageway 13121.Certainly movably connecting pipe 1313 also can be arranged at by other means the first intake channel 13111, the In two intake channels 13112 or exit passageway 13121, such as the present embodiment, movably connecting pipe 1313 passes through screw connection manner and first Intake channel 13111, the second intake channel 13112 or exit passageway 13121 connect.Illustrate, movably connecting pipe 1313 Outer surface has an external screw thread 13132, the first intake channel 13111, the second intake channel 13112 or exit passageway 13121 Side wall there is internal thread 1314, when movably connecting pipe 1313 is arranged at the first intake channel 13111, the second intake channel 13112 or during exit passageway 13121, the external screw thread 13132 of movably connecting pipe 1313 enters with the first intake channel 13111, second The bolt of internal thread 1314 of mouth passage 13112 or exit passageway 13121, makes movably connecting pipe 1313 not pushed away by fluid Move and depart from the first intake channel 13111, the second intake channel 13112 or exit passageway 13121, and movably connecting pipe 1313 Still can unload from the first intake channel 13111, the second intake channel 13112 or exit passageway 13121.

Figure 35 to Figure 38 is referred to again, treats that movably connecting pipe 1313 plugs or is bolted in the first intake channel 13111, second enters After mouthful passage 13112 or exit passageway 13121, may be selected directly fixation movably connecting pipe 1313 in the first intake channel 13111, Second intake channel 13112 or exit passageway 13121, wherein fixed form can be by spot-welded movably connecting pipes 1313 in the One intake channel 13111, the second intake channel 13112 or exit passageway 13121.

Embodiment 20

Figure 39 is referred to, it is the profile of the switching valve 13 of the embodiment of the present application 20；As illustrated, the present embodiment in Sealing ring 1315 is further provided between the intake channel 13111 of movably connecting pipe 1313 and first, sealing ring 1315 is filled in flexible connection Between the side wall of the outer surface of pipe 1313 and the first intake channel 13111, effectively prevent fluid from movably connecting pipe 1313 with Slot leakage between the first intake channel 13111, reduces fluid loss rate.Certainly the sealing ring 1315 of the present embodiment can be applicable to In embodiment 17 and embodiment 18 between the second intake channel 13112 and movably connecting pipe 1313 or exit passageway 13121 with Between movably connecting pipe 1313, repeat no more in this.

Figure 35 to Figure 39 is referred to again, connects the end face of one end of the movably connecting pipe 1313 of accommodation space 13113 according to valve Depending on first valve element 1321 of cored structure 132 and the form of the second valve element 1322, illustrate, the first valve element 1321 and the second valve Core 1322 is solid sphere, hollow ball, solid cylinder, hollow cylinder, the solid obform body with cambered surface or with arc The hollow obform body in face, the end face for connecting one end of the movably connecting pipe 1313 of accommodation space 13113 can be with the first valve for inclined-plane The plane tangent of the valve element 1322 of core 1321 or second, when the first valve element 1321 or the second valve element 1322 are connected to movably connecting pipe During 1313 end face, the passage 13131 of movably connecting pipe 1313 is closed.If the first valve element 1321 and the second valve element 1322 are solid Cylinder, hollow cylinder, the solid obform body with vertical plane or the hollow obform body with vertical plane, connect accommodation space The end face of one end of 13113 movably connecting pipe 1313 can be with the first valve element 1321 or the side of the second valve element 1322 for vertical plane Vertical plane it is mutually closely sealed, when the first valve element 1321 or the second valve element 1322 are connected to the end face of movably connecting pipe 1313, envelope Close the passage 13131 of movably connecting pipe 1313.

In sum, the medical stabilized pressure pump of the application has two plunger shafts, two piston structures in two plunger shafts Move back and forth in corresponding plunger shaft in turn, allow the output high-pressure fluid that medical stabilized pressure pump is stable, keep output fluid Pressure remain certain.The pump housing of the application accommodates two plunger shafts, takes up room little.The piston structure of the application can be from piston Extract cleaning in chamber out, piston rod connector is used with piston rod for assembling, removable cleaning when cleaning is easily eliminated and residued in Piston rod connects the bacterium with piston rod.The switching valve of the application has good switching efficiency, makes produced by two plunger shafts High-pressure fluid can stably export.

The upper only presently filed embodiment, is not limited to the application.For those skilled in the art For, the application can have various modifications and variations.All any modification, equivalents made in spirit herein and principle Replace, improve etc., all should be included within the scope of claims hereof.

Claims

1. a kind of medical stabilized pressure pump, it is characterised in that include：

The pump housing, with first fluid gateway, second fluid gateway and two plunger shafts, the first fluid gateway and Two stream sockets are connected respectively with two plunger shafts, and in two plunger shafts piston structure is respectively equipped with；

First flow bridgeware, is arranged at the pump housing, and connects with the first fluid gateway；

Second flow channel bridgeware, is arranged at the pump housing, and is oppositely arranged with the first flow bridgeware, and with described second Stream socket is connected；

Check valve, connects the first flow bridgeware and second flow channel bridgeware, and by the first flow bridgeware and Second flow channel bridgeware is connected with the first fluid gateway and second fluid gateway；And

Switching valve, is arranged at the side of the check valve, and connects the first flow bridgeware and second flow channel bridgeware, and Connected with the first fluid gateway and second fluid gateway by the first flow bridgeware and second flow channel bridgeware It is logical.

2. medical stabilized pressure pump according to claim 1, it is characterised in that the first flow bridgeware has first fluid Into passage, first fluid exit passageway and first fluid Vomitory, the first fluid Vomitory is located at described first Between fluid entering channel and first fluid exit passageway, and passage and first fluid exit passageway company are entered with the first fluid It is logical, and connect with the first fluid gateway；There is the second flow channel bridgeware second fluid to enter passage, second fluid Exit passageway and second fluid Vomitory, the second fluid Vomitory is located at the second fluid and enters passage and second Between fluid outlet channels, and connect into passage and second fluid exit passageway with the second fluid, and it is first-class with described Body gateway connects.

3. medical stabilized pressure pump according to claim 1, it is characterised in that the piston structure includes：

Piston rod connector, including connector, sealing ring and claw structure, the sealing ring is sheathed on the first of the connector End, the claw structure is arranged at the second end of the connector, one end connection of multiple claws of the claw structure The second end of the connector, the other end of the plurality of claw has respectively grab, the corresponding company of the plurality of grab The central axis of junctor；And

Piston rod, it has convex portion, and the convex portion is arranged between the plurality of claw.

4. medical stabilized pressure pump according to claim 3, it is characterised in that the outer surface of the first end of the connector With annular slot；The sealing ring has ring packing body and annular sealing lip, the inner side of the ring packing body Surface has loop fasteners, and the ring packing body is arranged at the outer surface of the first end, and the loop fasteners set The annular slot is placed in, the first end of the annular sealing lip is fixed on the outside of the ring packing body, the ring There is gap between the second end of shape sealed lip and ring packing body.

5. medical stabilized pressure pump according to claim 4, it is characterised in that the centre of the first end of the connector has Connecting hole, the sealing ring further includes engaging projection, and the engaging projection is arranged at the medial center of the ring packing body, The ring packing body is arranged at the outer surface of the first end, and the engaging projection is arranged at the connecting hole.

6. medical stabilized pressure pump according to claim 3, it is characterised in that the sealing ring has ring packing body and ring Shape sealed lip, the ring packing body is sheathed on the outer surface of the first end, and the of the annular sealing lip The ring packing body is fixed in one end, has gap between the second end of the annular sealing lip and ring packing body； It further includes block piece, and the block piece is bolted in the first end of the connector, and by laser welding in the connection The first end of body, and cover the gap.

7. medical stabilized pressure pump according to claim 2, it is characterised in that the switching valve includes：

Valve body, with the first intake channel, the second intake channel, at least one exit passageway and accommodation space, the accommodating sky Between be located at first intake channel, between the second intake channel and at least one exit passageway, and connect first import lead to Road, the second intake channel and at least one exit passageway；And

Valve core structure, it is arranged at the accommodation space, and correspondence first intake channel and the second intake channel；

Wherein described first intake channel connects the first fluid exit passageway of the first flow bridgeware, second import The second fluid exit passageway of second flow channel bridgeware described in channel connection.

8. medical stabilized pressure pump according to claim 7, it is characterised in that the valve core structure includes the first valve element and second Valve element, corresponding first intake channel of first valve element, corresponding second intake channel of second valve element.

9. medical stabilized pressure pump according to claim 8, it is characterised in that the valve core structure also includes spring, the bullet Spring is arranged at first valve element and the second valve core chamber.

10. medical stabilized pressure pump according to claim 8, it is characterised in that the valve core structure also includes pre-pressing spring, The pre-pressing spring is arranged at first valve element and the second valve core chamber, and the two ends of the pre-pressing spring abut described first Valve element and the second valve element, first valve element and the second valve element are connected to respectively described accommodating around first intake channel The side wall of the accommodation space around the side wall in space and second intake channel.