CN114522298A - Micro-injection pump - Google Patents
Micro-injection pump Download PDFInfo
- Publication number
- CN114522298A CN114522298A CN202210024774.2A CN202210024774A CN114522298A CN 114522298 A CN114522298 A CN 114522298A CN 202210024774 A CN202210024774 A CN 202210024774A CN 114522298 A CN114522298 A CN 114522298A
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- Prior art keywords
- pressure
- groove
- fixed
- micro
- pressing
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- 238000000520 microinjection Methods 0.000 title claims abstract description 11
- 230000007246 mechanism Effects 0.000 claims abstract description 24
- 230000000087 stabilizing effect Effects 0.000 claims abstract description 20
- 238000007789 sealing Methods 0.000 claims description 16
- 239000012530 fluid Substances 0.000 claims description 10
- SZVJSHCCFOBDDC-UHFFFAOYSA-N iron(II,III) oxide Inorganic materials O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 claims description 8
- 230000000694 effects Effects 0.000 abstract description 10
- 230000006835 compression Effects 0.000 description 9
- 238000007906 compression Methods 0.000 description 9
- 238000002347 injection Methods 0.000 description 8
- 239000007924 injection Substances 0.000 description 8
- 239000003814 drug Substances 0.000 description 7
- 238000009434 installation Methods 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 229940079593 drug Drugs 0.000 description 2
- 239000010720 hydraulic oil Substances 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000013475 authorization Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001802 infusion Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000010999 medical injection Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
Images
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
- A61M5/142—Pressure infusion, e.g. using pumps
- A61M5/145—Pressure infusion, e.g. using pumps using pressurised reservoirs, e.g. pressurised by means of pistons
- A61M5/1452—Pressure infusion, e.g. using pumps using pressurised reservoirs, e.g. pressurised by means of pistons pressurised by means of pistons
Abstract
The invention discloses a micro-injection pump, which comprises a pump body, wherein a control panel is arranged on the pump body, a propelling device is arranged on the pump body, one end of the propelling device is provided with a connecting pressure head connected with a needle cylinder push rod, a needle cylinder fixing device is arranged on the pump body, the needle cylinder fixing device comprises a fixing shell fixed on the pump body, a connecting groove is formed in the fixing shell, a pressing plate is hinged to the fixing shell, and a notch of the connecting groove can be shielded by the pressing plate; the fixed shell is connected with a compressing rod with one end extending into the connecting groove in a sliding mode, and the compressing rod is connected with a pressure stabilizing mechanism which drives the compressing rod to move towards the direction of the central line of the connecting groove. The invention has the effect of facilitating the fixation of injectors with different specifications.
Description
Technical Field
The invention relates to the field of medical injection instruments, in particular to a micro-injection pump.
Background
As a common clinical treatment means, the micro-syringe pump medication has been widely applied in various fields of medical practice. The micro-injection pump has the working principle that a stepping motor is used as a power source, a system sends out control pulses to enable the stepping motor to rotate, the stepping motor drives a screw rod to rotate, the screw rod drives a pushing and injecting head on a transmission nut to move linearly, so that a piston of an injector is pushed to move linearly, liquid in the injector flows along one direction, the pushing speed of the liquid can be adjusted through the rotation movement of a set screw rod, and the dosage of given medicines is adjusted. Meanwhile, the input, the injection precision and the reliability in a speed regulation range can be ensured through a speed measurement feedback system.
The invention discloses a Chinese patent with an authorization notice number of CN104815369B, which comprises a device main body, a stepping motor device and a liquid medicine flow control box, wherein an alarm lamp is arranged on the front side of the device main body, a pipeline prompting blocked button, an injection stop button and a medicine quantity prompting key are arranged on the right side of the alarm lamp, an information display screen is arranged on the right side of the medicine quantity prompting key, a starting button is arranged between the information display screen and the medicine quantity prompting key, a medicine quantity selecting key is arranged on the right side of the starting button, a power line port is arranged on the device main body, the power line port is connected with a power line, the power line is connected with a plug, an injection pressure support frame is arranged on the lower side of the device main body, the injection pressure support frame is connected with an injection pressure device, and an injection pressure box is arranged in the injection pressure device. The injection pump of the scheme is convenient to use.
The national standard only specifies the capacity of the syringe and does not limit the diameter-length ratio of the syringe. The injector clamping grooves of the micro-injection pump on the market at present are all fixed, the injector is fixed by clamping and pressing a single fixed pressing sheet at the tail ends of an injector tube and an injector piston rod, although the injector provided by a manufacturer can be used for injectors with different specifications, for some injectors with small diameter, such as 10ml injectors, the injectors are put into the clamping grooves with 60ml, the diameter of the concave surface of each clamping groove is certainly larger than that of the injectors with 10ml,
the above prior art solutions have the following drawbacks: the concavity of the fixed pressing piece clamp is fixed, so that the matching degree of the injector with different diameters and the fixed pressing piece of the micro-injection pump is poor, the tightness is difficult to guarantee, and the sliding phenomenon of the injector tube cannot be avoided in the pushing process.
Disclosure of Invention
The invention aims to provide a micro-injection pump which has the effect of conveniently fixing injectors with different specifications.
The technical purpose of the invention is realized by the following technical scheme:
a micro-injection pump comprises a pump body, a control panel is arranged on the pump body, a propelling device is arranged on the pump body, a connecting pressure head connected with a push rod is arranged at one end of the propelling device, a needle cylinder fixing device is arranged on the pump body,
the needle cylinder fixing device comprises a fixing shell fixed on the pump body, a connecting groove is formed in the fixing shell, a pressing plate is hinged to the fixing shell, and the pressing plate can shield the opening of the connecting groove;
the fixed shell is connected with a pressing rod with one end extending into the connecting groove in a sliding mode, and the pressing rod is connected with a pressure stabilizing mechanism which drives the pressing rod to move towards the direction of the central line of the connecting groove.
Through adopting above-mentioned technical scheme, put the cylinder in the spread groove, syringe needle on the cylinder compresses tightly with being connected the pressure head and be connected, it makes the pressure strip shelter from the spread groove notch to rotate the pressure strip, start voltage stabilizing mechanism, voltage stabilizing mechanism exerts stable pressure effect to compressing tightly the pole, compressing tightly the pole removal, promote the cylinder that is located the spread groove when compressing tightly the pole removal, until compressing tightly the pole, cylinder and pressure strip compression joint, realize the stable connection of cylinder and set casing, the cylinder of different specifications is put in the spread groove, the distance that compresses tightly the pole removal is different, compressing tightly the pole and receiving voltage stabilizing mechanism's effect and can exert stable pressure to lieing in the cylinder, the cylinder of the multiple specification of being convenient for is connected with the rapid stabilization between the pump body.
The invention is further configured to: the pressure stabilizing mechanism comprises a fixed cylinder sleeved on a compression rod, the compression rod is connected with the inner cavity of the fixed cylinder in a sealing and sliding mode, the fixed cylinder is communicated with a high-pressure hose, the high-pressure hose is communicated with a pressure pump, and the pressure pump provides fluid with stable pressure into the high-pressure hose.
By adopting the technical scheme, when the pressure pump is started, high-pressure fluid is injected into the high-pressure hose, the high-pressure fluid enters the fixed cylinder through the high-pressure hose, and the high-pressure fluid pushes the pressing rod to move along the inner cavity of the fixed cylinder, so that the effect that the pressure stabilizing mechanism applies stable pressure to the pressing rod is realized.
The invention is further configured to: the fixed cylinder is internally provided with a movable sealing groove, a movable sealing ring is embedded in the movable sealing groove, and the pressing rod is connected with the fixed cylinder in a sliding mode through the movable sealing ring.
Through adopting above-mentioned technical scheme, inlay the movable seal circle of locating in the movable seal groove and be connected with the stationary barrel is kept stable, and the movable seal circle cover is located the compression bar outside to realize the sliding connection that obturates of compression bar and stationary barrel.
The invention is further configured to: the compressing rods are arranged in a plurality at intervals along the circumferential direction of the central line of the connecting groove.
Through adopting above-mentioned technical scheme, a plurality of pressure bars exert the effect to the cylinder, make cylinder and pressure strip compression joint, and the effort that the pressure bar was exerted to the cylinder distributes evenly, and the stability between pressure bar and the cylinder is high.
The invention is further configured to: and one end of the pressing rod, which faces the central line of the connecting groove, is fixedly provided with a pressing cushion block.
Through adopting above-mentioned technical scheme, compress tightly the area of contact that the cushion can increase compression bar and cylinder lateral surface, when improving compression bar and cylinder connection stability, reduce the pressure that compresses tightly the pole and cylinder junction.
The invention is further configured to: the connecting pressure head is hinged with two mounting plates which are arranged at intervals along the vertical direction, and a tension spring is connected between the mounting plates.
Through adopting above-mentioned technical scheme, when being connected the push rod with being connected the pressure head, put the push rod between two mounting panels, the extension spring drives two mounting panels and compresses tightly with the push rod to be connected, improves the stability of connecting.
The invention is further configured to: the utility model discloses a fixed shell, including the fixed casing of casing, the fixed casing is equipped with the gag lever post on, the gag lever post includes the outer pole of the interior pole of being fixed in with the fixed casing of pole, the outer pole towards the fixed casing surface energy and the pressure strip surface contact of casing of fixing dorsad, gag lever post and pressure strip are located the both sides of spread groove notch respectively.
Through adopting above-mentioned technical scheme, rotate the pressure strip around the articulated department of pressure strip and set casing, move to between outer pole and the set casing until the pressure strip keeps away from its one end articulated with the set casing, the pressure strip surface compresses tightly with the medial surface contact of outer pole orientation set casing, and the pressure strip shelters from the spread groove notch this moment, and pressure strip and set casing remain stable connection.
The invention is further configured to: the gag lever post is the L type pole of opening along spread groove length direction, the gag lever post opening inboard has set firmly fixed magnetite on interior pole, the surface of pressure strip and interior pole contact has set firmly the removal magnetite.
Through adopting above-mentioned technical scheme, when rotating the pressure strip and until removing magnetite and fixed magnetite and contact each other, the pressure strip is located between interior pole and the set casing, removes the interact between magnetite and the fixed magnetite, can avoid the syringe pump in the use, and the circumstances of vibration or the unexpected separation of other circumstances takes place between pressure strip and the gag lever post.
The invention is further configured to: the pressure head structure is characterized in that a limiting groove is formed in the fixed shell, a yielding groove communicated with the limiting groove is formed in the surface of the fixed shell facing the connecting pressure head, a cover-shaped pressure plate with an opening facing the connecting pressure head is arranged in the yielding groove, a pressure spring is connected to the cover-shaped pressure plate facing the inner side of the connecting pressure head, and a mounting plate fixed to the fixed shell is pressed against the end face of the pressure spring facing the connecting pressure head.
By adopting the technical scheme, the opening of the cover-shaped pressing plate faces the connecting pressure head, the cover-shaped pressing plate is pushed to be inserted into the limiting groove through the abdicating groove, the pressure spring is placed in the opening of the cover-shaped pressing plate, the mounting plate is fixed on the surface of the fixing shell facing the connecting pressure head, and two end surfaces of the pressure spring are respectively connected with the cover-shaped pressing plate and the mounting plate in a pressing manner; the pull handle on the needle cylinder is placed in the limiting groove, and the cover-shaped pressing plate is pressed with the pull handle, so that the connection stability between the needle cylinder and the fixed shell is improved.
The invention is further configured to: the cover-shaped pressing plate smoothly transits towards one side of the opening of the connecting groove.
Through adopting above-mentioned technical scheme, lid shape pressure strip installation back, lid shape pressure strip is connected the surface of pressure head dorsad and is compressed tightly with the side of spacing groove, and when the pull handle that will install inserted lid shape pressure strip, the pressure head direction removal was connected to the lid shape pressure strip orientation of being convenient for.
In conclusion, the beneficial effects of the invention are as follows:
1. the needle cylinders are placed in the connecting grooves, needle heads on the needle cylinders are connected with the connecting pressure heads in a pressing mode, the pressing plates are rotated to enable the pressing plates to shield notches of the connecting grooves, the pressure stabilizing mechanism is started, the pressure stabilizing mechanism exerts a stable pressure effect on the pressing rods, the pressing rods move, the needle cylinders located in the connecting grooves are pushed when the pressing rods move until the pressing rods, the needle cylinders and the pressing plates are connected in a pressing mode, the needle cylinders and the fixed shell are stably connected, the needle cylinders of different specifications are placed in the connecting grooves, the moving distances of the pressing rods are different, the pressing rods can exert stable pressure on the needle cylinders under the action of the pressure stabilizing mechanism, and rapid and stable connection between the needle cylinders of various specifications and a pump body is facilitated;
2. when the pressure pump is started, high-pressure fluid is injected into the high-pressure hose, the high-pressure fluid enters the fixed cylinder through the high-pressure hose, and the high-pressure fluid pushes the pressing rod to move along the inner cavity of the fixed cylinder, so that the effect that the pressure stabilizing mechanism applies stable pressure to the pressing rod is realized;
3. the opening of the cover-shaped pressing plate faces the connecting pressure head, then the cover-shaped pressing plate is pushed to be inserted into the limiting groove through the abdicating groove, the pressure spring is placed in the opening of the cover-shaped pressing plate, the mounting plate is fixed on the surface of the fixing shell facing the connecting pressure head, and two end faces of the pressure spring are respectively connected with the cover-shaped pressing plate and the mounting plate in a pressing mode; the pull handle on the needle cylinder is placed in the limiting groove, and the cover-shaped pressing plate is pressed with the pull handle, so that the connection stability between the needle cylinder and the fixed shell is improved.
Drawings
FIG. 1 is a schematic view of the overall structure of the embodiment;
FIG. 2 is an enlarged view at A in FIG. 1;
FIG. 3 is a schematic structural diagram of a voltage stabilizing mechanism in an embodiment;
FIG. 4 is a schematic sectional view showing the connection relationship between the fixed cylinder and the pressing rod in the embodiment;
fig. 5 is an exploded view showing the pressing mechanism in the embodiment.
In the figure, 1, a pump body; 11. a control panel; 2. a needle cylinder fixing device; 21. a stationary case; 211. connecting grooves; 212. a limiting groove; 213. a yielding groove; 22. a compression plate; 221. moving the magnet; 23. a hold down bar; 24. a pressure stabilizing mechanism; 241. a fixed cylinder; 2411. a dynamic seal groove; 2412. a connecting shell; 242. a high pressure hose; 243. a pressure pump; 244. a movable sealing ring; 24. pressing the cushion block; 3. a limiting rod; 31. an inner rod; 32. an outer rod; 33. fixing a magnet; 4. a propulsion device; 41. connecting a pressure head; 411. a compaction groove; 42. a stabilizer bar; 43. a tension spring; 5. a hold-down mechanism; 51. a cover-shaped pressure strip; 52. mounting a plate; 53. a pressure spring; 61. a needle cylinder; 62. a push rod.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Example one
Referring to fig. 1, the invention discloses a micro-injection pump, which comprises a pump body 1, wherein a control panel 11 is arranged on the pump body 1, and a control assembly is connected to the control panel 11 to control the operation of the pump body 1. A syringe 61 is connected to the pump body 1, and a push rod 62 is slidably connected to the syringe 61.
Be provided with advancing device 4 on the pump body 1, advancing device 4 is current advancing device 4, does not make the adjustment in this embodiment, and 4 one end of advancing device is fixed with the connection pressure head 41 that is used for connecting push rod 62, and advancing device 4 drives and connects pressure head 41 and move along the rectilinear direction is stable, has seted up on the connection pressure head 41 and has held push rod 62 one end male pressure tank 411, and pressure tank 411 is the circular slot.
The connecting pressure head 41 is provided with a pressing mechanism 5 connected with the push rod 62, the pressing mechanism 5 comprises two mounting plates 52 hinged on the connecting pressure head 41 and arranged at intervals along the vertical direction, the axis of a hinge shaft of the two mounting plates 52 is parallel to the moving direction of the connecting pressure head, a tension spring 43 is connected between the two mounting plates 52, and the tension spring 43 drives the two mounting plates 52 to rotate around the hinge shaft of the connecting pressure head 41. When the push rod 62 is placed on the connecting pressure head 41, the tension spring 43 drives the two mounting plates 52 to be connected with the pressing side surface of the push rod 62.
The pump body 1 is provided with a needle cylinder fixing device 2, the needle cylinder fixing device 2 comprises a fixing shell 21 fixed on the pump body 1, the fixing shell 21 is a semi-cylindrical shell, a connecting groove 211 is formed in the plane of the fixing shell 21, which faces away from the pump body 1, the connecting groove 211 is a semi-circular groove, and two ends of the connecting groove 211 penetrate through two ends of the axis direction of the fixing shell 21.
Referring to fig. 1 and 2, a pressing plate 22 is hinged to a plane of the fixed shell 21 facing away from the pump body 1, the pressing plate 22 is a strip-shaped plate, the pressing plate 22 can shield a notch of the connecting groove 211, and two pressing plates 22 are arranged at intervals along the length direction of the connecting groove 211.
The fixed shell 21 is fixedly provided with a limiting rod 3 on the plane back to the pump body 1, and the limiting rod 3 and the pressing plate 22 are respectively positioned on two sides of the notch of the connecting groove 211. The limiting rod 3 is an L-shaped rod with an opening along the length direction of the connecting groove 211, the limiting rod 3 comprises an inner rod 31 fixed with the fixed shell 21 and an outer rod 32 integrally formed with the inner rod 31, and the surface of the outer rod 32 facing the fixed shell 21 can be in contact with the surface of the pressing plate 22 facing away from the fixed shell 21.
A fixed magnet 33 is fixedly arranged on the inner rod 31 at the inner side of the opening of the limiting rod 3, a movable magnet 221 is fixedly arranged on the surface of the pressing plate 22, which is in contact with the inner rod 31, the pressing plate 22 is rotated to the opening of the limiting rod 3, and the movable magnet 221 and the fixed magnet 33 attract each other.
Referring to fig. 1 and 3, a pressing rod 23 is slidably connected to the fixed casing 21, one end of the pressing rod 23 penetrates through the fixed casing 21, one end of the pressing rod 23 penetrating through the fixed casing 21 can extend into the connecting groove 211, two groups of pressing rods 23 are arranged at intervals along the axial direction of the connecting groove 211, and four pressing rods 23 are arranged at intervals along the circumferential direction of the central line of the connecting groove 211. The pressing rod 23 is connected with a pressure stabilizing mechanism 24 which drives the pressing rod to move towards the central line direction of the connecting groove 211.
Referring to fig. 3 and 4, the pressure stabilizing mechanism 24 includes a fixing cylinder 241 sleeved on the pressing rod 23, and the pressing rod 23 is connected with the inner cavity of the fixing cylinder 241 in a sealing and sliding manner. The fixing cylinder 241 is a cylindrical shell, one end of the fixing cylinder 241 is provided with a sealing hole communicated with an inner cavity of the fixing cylinder 241, one end of the pressing rod 23 penetrates through the sealing hole to extend out of the fixing cylinder 241, an annular movable sealing groove 2411 is arranged in the sealing hole of the fixing cylinder 241, a movable sealing ring 244 is embedded in the movable sealing groove 2411 and is sleeved outside the pressing rod 23, one end, extending into the inner cavity of the fixing cylinder 241, of the pressing rod 23 is integrally formed with a sliding disc, and the outer side face of the sliding disc is in contact with the inner side face of the fixing cylinder 241.
A connecting shell 2412 is fixed on the outer side of the fixed cylinder 241, the connecting shell 2412 is a square shell, and a fixed plate fixed on the fixed shell 21 is fixed on the same radial four connecting shells 2412 of the connecting groove 211.
The fixed cylinder 241 is provided with a fluid in an inner cavity, the fluid is hydraulic oil in this embodiment, the fixed cylinder 241 is communicated with a high-pressure hose 242, the high-pressure hose 242 is communicated with a same pressure pump 243, the pressure pump 243 is communicated with all the high-pressure hoses 242, and the pressure pump 243 supplies the hydraulic oil with stable pressure to the high-pressure hoses 242.
Referring to fig. 2, a pressing pad 24 is fixedly provided at one end of the pressing lever 23 facing the center line of the coupling groove 211. The pressing cushion block 24 can increase the contact area between the pressing rod 23 and the outer side surface of the needle cylinder 61, and reduce the pressure at the joint of the pressing rod 23 and the needle cylinder 61 while improving the connection stability of the pressing rod 23 and the needle cylinder 61.
Referring to fig. 5, the fixing shell 21 is provided with a limiting groove 212 for accommodating a protruding upper pull handle at one end of the syringe 61, the limiting groove 212 is provided on a plane of the fixing shell 21 facing away from the pump body 1, the limiting groove 212 is a semi-annular groove, the surface of the fixing shell 21 facing the connecting pressure head 41 is provided with a yielding groove 213 communicated with the limiting groove 212, the yielding groove 213 is a semi-annular groove, the yielding groove 213 does not penetrate through the plane of the fixing shell 21 facing away from the pump body 1,
the cover-shaped pressing plate 51 with the opening facing the connecting pressure head 41 is arranged in the yielding groove 213, the cover-shaped pressing plate 51 comprises a bottom plate with a semicircular ring structure and a side plate fixed to the same side of the bottom plate in the circumferential direction, the connection position of the bottom plate and the side plate is in smooth transition, the outer side surface of the side plate is in side contact with the yielding groove 213, the side plate slides along the side surface of the yielding groove 213, and the cover-shaped pressing plate 51 is in smooth transition facing the one side of the opening of the connecting groove 211. The cover-shaped pressing plate 51 is connected with three pressure springs 53 towards the inner side of the connecting pressing head 41, the number of the pressure springs 53 is three along the circumferential direction of the cover-shaped pressing plate 51 at intervals, the end face, facing the connecting pressing head 41, of each pressure spring 53 abuts against and presses an installation plate 52 fixed on the fixed shell 21, and a notch for accommodating the push rod 62 is formed in the installation plate 52.
The shell is fixedly provided with a supporting plate, and the supporting plate is provided with a round hole for accommodating the infusion hose to pass through.
The implementation principle of the above embodiment is as follows:
put cylinder 61 in the spread groove 211, syringe needle on the cylinder 61 compresses tightly with being connected pressure head 41 and is connected, it makes the pressure strip 22 shelter from the spread groove 211 notch to rotate the pressure strip 22, start voltage stabilizing mechanism 24, voltage stabilizing mechanism 24 exerts stable pressure effect to compressing tightly pole 23, compressing tightly pole 23 removes, it is located the cylinder 61 of spread groove 211 to promote when compressing tightly pole 23 removes, until compressing tightly pole 23, cylinder 61 and pressure strip 22 compress tightly and connect, realize the stable connection of cylinder 61 and set casing 21, the cylinder 61 of different specifications is put in spread groove 211, the distance that compressing tightly pole 23 removed is different, compressing tightly pole 23 receives the effect that voltage stabilizing mechanism 24 can exert stable pressure to lieing in cylinder 61, be convenient for the quick stable connection between the cylinder 61 of multiple specification and the pump body 1.
The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.
Claims (10)
1. The utility model provides a micro-injection pump, includes the pump body (1), be provided with control panel (11) on the pump body (1), be provided with advancing device (4) on the pump body (1), advancing device (4) one end is provided with connection pressure head (41) of connecting push rod (62), its characterized in that: a needle cylinder fixing device (2) is arranged on the pump body (1),
the needle cylinder fixing device (2) comprises a fixing shell (21) fixed on the pump body (1), a connecting groove (211) is formed in the fixing shell (21), a pressing plate (22) is hinged to the fixing shell (21), and the pressing plate (22) can shield a notch of the connecting groove (211);
the fixed shell (21) is connected with a compressing rod (23) with one end extending into the connecting groove (211) in a sliding mode, and the compressing rod (23) is connected with a pressure stabilizing mechanism (24) which drives the compressing rod to move towards the direction of the central line of the connecting groove (211).
2. A micro-syringe pump according to claim 1, wherein: the pressure stabilizing mechanism (24) comprises a fixed cylinder (241) sleeved with a pressing rod (23), the pressing rod (23) is connected with the inner cavity of the fixed cylinder (241) in a sealing and sliding mode, the fixed cylinder (241) is communicated with a high-pressure hose (242), the high-pressure hose (242) is communicated with a pressure pump (243), and the pressure pump (243) provides fluid with stable pressure into the high-pressure hose (242).
3. A micro-syringe pump according to claim 2, wherein: be provided with in the fixed cylinder (241) and move seal groove (2411), it is equipped with movable sealing washer (244) to move seal groove (2411) is embedded, compress tightly pole (23) and fixed cylinder (241) sliding connection through movable sealing washer (244).
4. A micro-syringe pump according to claim 2, wherein: the pressing rods (23) are arranged in a plurality at intervals along the circumferential direction of the center line of the connecting groove (211).
5. A micro-syringe pump according to claim 1, wherein: and one end of the pressing rod (23) facing the center line of the connecting groove (211) is fixedly provided with a pressing cushion block (24).
6. A micro-syringe pump according to claim 1, wherein: connect articulated on pressure head (41) have two along vertical interval set up mounting panel (52), two be connected with an extension spring (43) between mounting panel (52).
7. A micro-syringe pump according to claim 1, wherein: set firmly gag lever post (3) on set casing (21), gag lever post (3) include with set casing (21) fixed interior pole (31) and be fixed in outer pole (32) of interior pole (31), outer pole (32) are towards the surface energy of set casing (21) and pressure strip (22) surface contact of set casing (21) dorsad, gag lever post (3) and pressure strip (22) are located the both sides of spread groove (211) notch respectively.
8. The micro-syringe pump of claim 7, wherein: gag lever post (3) are the L type pole of opening along spread groove (211) length direction, gag lever post (3) opening inboard has set firmly fixed magnetite (33) on interior pole (31), the surface of pressure strip (22) and interior pole (31) contact has set firmly removal magnetite (221).
9. A micro-syringe pump according to claim 1, wherein: spacing groove (212) have been seted up on set casing (21), set casing (21) are offered towards the surface of connecting pressure head (41) and are stepped down groove (213) that communicate with spacing groove (212), it is provided with lid shape pressure strip (51) that the opening is connected pressure head (41) towards in groove (213) to step down, lid shape pressure strip (51) are connected with pressure spring (53) towards the inboard of connecting pressure head (41), pressure spring (53) are towards the terminal surface of connecting pressure head (41) to be supported and are pressed there is mounting panel (52) that is fixed in set casing (21).
10. A micro-syringe pump according to claim 9, wherein: the cover-shaped pressing plate (51) is smoothly transited towards one side of the opening of the connecting groove (211).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210024774.2A CN114522298B (en) | 2022-01-07 | 2022-01-07 | Micro-injection pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210024774.2A CN114522298B (en) | 2022-01-07 | 2022-01-07 | Micro-injection pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114522298A true CN114522298A (en) | 2022-05-24 |
| CN114522298B CN114522298B (en) | 2024-03-15 |
Family
ID=81621359
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210024774.2A Active CN114522298B (en) | 2022-01-07 | 2022-01-07 | Micro-injection pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114522298B (en) |
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| JP2013094377A (en) * | 2011-10-31 | 2013-05-20 | Terumo Corp | Syringe pump |
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| CN114522298B (en) | 2024-03-15 |
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