Fine filling device

Abstract

The application provides a fine filling device, which comprises a moving module, a replacing module and two injection pumps. The replacing module is used for liquid refilling of the empty injection pump, and comprises a storage device for storing liquid to be filled and at least two groups of fixing frames which are arranged side by side above the storage device; the moving module is used for driving the injection pump to move between a filling position and the fixing frames. Compared with the prior art, the fine filling device provided by the application is provided with two injection pumps which are used alternately. When the medicament loaded in one injection pump is used up, the moving module sends the injection pump back to the fixing frame above the liquid storage tank, and another full-liquid injection pump is replaced, the injection pump with exhausted liquid is refilled with medicament during the period, and waits for the next replacement, so that continuous filling of the injection pump is realized. In addition, the fine filling device can also realize micro-filling of the medicament, and the filling speed and filling time can be flexibly adjusted.

Description

Technical Field

[0001] This invention relates to the field of fluid supply control technology, and in particular to a precision filling device. Background Technology

[0002] In actual production using the complexed iron desulfurization process at sulfur-containing well sites, in addition to adding commonly used desulfurizing agents, trace amounts of surfactants are also added to control the size of sulfur particles and ensure stable operation of the desulfurization system. During the surfactant addition process, it needs to be done slowly and continuously to ensure the stability of the surfactant's effect.

[0003] Currently, continuous micro-volume infusion of liquids is mainly achieved through peristaltic pumps and syringe pumps. Peristaltic pumps utilize multiple rollers to pump liquids by alternately squeezing and releasing the pump's elastic delivery hose. They are characterized by being pollution-free, having high repeatability, and being easy to maintain. However, peristaltic pump hoses have a short lifespan, and wear over time can cause changes in flow rate. Syringe pumps use a microcontroller system to send control pulses to rotate a stepper motor. The stepper motor drives a lead screw to convert the rotational motion into linear motion, pushing the syringe piston to inject liquid, achieving high-precision, stable, and pulsation-free liquid delivery. However, each syringe holds a small amount of liquid, and the replenishment process is cumbersome, making it unsuitable for long-term continuous infusion and hindering the continuous and stable delivery of surfactants. Summary of the Invention

[0004] In view of the shortcomings of the prior art, the purpose of the present invention is to provide a precision dispensing device that can achieve continuous and stable dispensing of drugs.

[0005] The present invention provides a precision dispensing device, comprising a moving module, a replacement module, and at least two injection pumps;

[0006] The replacement module includes a storage device and at least two sets of fixing brackets; the storage device is used to store the liquid to be added, and the at least two sets of fixing brackets are arranged side by side above the storage device; the fixing bracket includes a mounting base, a drive mechanism, and a positioning mechanism, the drive mechanism is disposed on the mounting base, and the positioning mechanism is detachably connected to the injection pump, the drive mechanism is used to support and drive the positioning mechanism to move the injection pump up and down so that the injection port of the injection pump on the positioning mechanism extends into the liquid in the storage device or moves out of the liquid in the storage device;

[0007] The moving module includes a first moving bracket, a second moving bracket, and a positioning mechanism; the positioning mechanism is detachably connected to the injection pump; the positioning mechanism is mounted on the second moving bracket, which supports and drives the positioning mechanism to reciprocate along the arrangement direction of the at least two sets of fixed brackets; the second moving bracket is mounted on the first moving bracket, which supports and drives the second moving bracket and the positioning mechanism to reciprocate between the filling position and the fixed brackets. The liquid storage device is preferably a liquid storage tank.

[0008] Preferably, the driving mechanism of the fixing frame includes a motor, a lead screw, an optical axis, and a slider; the lead screw and the optical axis are arranged parallel to each other on the mounting base, the motor is fixed on the mounting base and connected to the lead screw, the slider is provided with a through hole for the optical axis to pass through and a screw hole that mates with the lead screw, the optical axis and the lead screw respectively pass through the through hole and the screw hole on the slider, the positioning mechanism of the fixing frame is provided on the slider, and the motor is used to drive the lead screw to rotate so as to drive the slider to reciprocate along the lead screw and the optical axis, so that the injection port of the injection pump on the positioning mechanism extends into the liquid of the storage device or moves out of the liquid of the storage device.

[0009] Preferably, the driving mechanism of the fixing frame includes a motor, a lead screw, a slide groove, and a slider; the lead screw and the slide groove are arranged parallel to each other on the mounting base, the motor is fixed on the mounting base and connected to the lead screw, the slider is partially disposed in the slide groove, the slider is provided with a screw hole that mates with the lead screw, the lead screw passes through the screw hole, the positioning mechanism of the fixing frame is disposed on the slider, and the motor is used to drive the lead screw to rotate so as to drive the slider to reciprocate along the lead screw and the slide groove, so that the injection port of the injection pump on the positioning mechanism extends into or removes from the liquid in the storage device.

[0010] Preferably, both the first movable support and the second movable support include a support frame and a drive mechanism disposed on the support frame; the drive mechanism includes a motor, a lead screw, an optical axis, and a slider, the lead screw and the optical axis are disposed parallel to each other on the support frame, the motor is fixed on the support frame and connected to the lead screw, the slider is provided with a through hole through which the optical axis can pass and a screw hole that mates with the lead screw, the optical axis and the lead screw respectively pass through the through hole and the screw hole on the slider, and the motor is used to drive the lead screw to rotate so as to drive the slider to reciprocate along the lead screw and the optical axis;

[0011] The support frame on the second movable bracket is fixedly mounted on the slider of the first movable bracket. The extension direction of the lead screw on the second movable bracket is parallel to the arrangement direction of the at least two sets of fixed brackets. The extension direction of the lead screw on the first movable bracket is perpendicular to the extension direction of the lead screw on the second movable bracket. The positioning mechanism on the movable module is disposed on the slider of the second movable bracket.

[0012] Preferably, both the first movable support and the second movable support include a support frame and a drive mechanism disposed on the support frame; the drive mechanism includes a motor, a lead screw, a slide groove, and a slider; the lead screw and the slide groove are disposed parallel to each other on the support frame, the motor is fixed on the support frame and connected to the lead screw, the slider is partially disposed in the slide groove, the slider is provided with a screw hole that mates with the lead screw, the lead screw passes through the screw hole, and the motor is used to drive the lead screw to rotate so as to drive the slider to reciprocate along the lead screw and the slide groove;

[0013] The support frame on the second movable bracket is fixedly mounted on the slider of the first movable bracket. The extension direction of the lead screw on the second movable bracket is parallel to the arrangement direction of the at least two sets of fixed brackets. The extension direction of the lead screw on the first movable bracket is perpendicular to the extension direction of the lead screw on the second movable bracket. The positioning mechanism on the movable module is disposed on the slider of the second movable bracket.

[0014] Preferably, the first movable support includes two sets of drive mechanisms, which are arranged in parallel on the support frame of the first movable support; the support frame of the second movable support is also fixedly mounted on the sliders of the two sets of drive mechanisms.

[0015] Preferably, the injection pump is provided with at least two positioning through holes, and the positioning mechanism includes at least two electromagnets that can be inserted into the positioning through holes.

[0016] Preferably, the injection pump includes a support frame, a drive mechanism, and a syringe; the drive mechanism includes a stepper motor, a lead screw, an optical axis, and a slider. The lead screw and the optical axis are arranged parallel to each other on the support frame. The stepper motor and the syringe are respectively fixedly mounted on the support frames at both ends of the lead screw. The stepper motor is connected to the lead screw. The slider is provided with a through hole through which the optical axis can pass and a screw hole that mates with the lead screw. The optical axis and the lead screw pass through the through hole and the screw hole on the slider, respectively. The stepper motor is used to drive the lead screw to rotate so as to drive the slider to reciprocate along the lead screw and the optical axis. The slider is connected to and drives the piston of the syringe to reciprocate, thereby causing the syringe to draw or discharge liquid.

[0017] Preferably, the injection pump includes a support frame, a drive mechanism, and a syringe; the drive mechanism includes a stepper motor, a lead screw, a slide, and a slider.

[0018] The lead screw and the slide groove are arranged parallel to each other on the support frame. The stepper motor and the syringe are respectively fixedly installed on the support frames at both ends of the lead screw. The stepper motor is connected to the lead screw. The slider is partially disposed in the slide groove. The slider is provided with a screw hole that mates with the lead screw. The lead screw passes through the screw hole. The positioning mechanism of the fixing frame is disposed on the slider. The motor is used to drive the lead screw to rotate so as to drive the slider to reciprocate along the lead screw and the slide groove. The slider is connected to and drives the piston of the syringe to reciprocate, thereby causing the syringe to draw or discharge liquid.

[0019] Preferably, the support frame is provided with at least two positioning through holes, and the positioning mechanism includes at least two electromagnets that can be inserted into the positioning through holes.

[0020] Compared with the prior art, the precision dispensing device provided by the present invention is equipped with two injection pumps used alternately. When the agent loaded in one injection pump is used up, the moving module will send the injection pump back to the fixed frame above the liquid storage tank and replace it with another injection pump full of liquid. During this period, the injection pump that has run out of liquid is refilled with agent, waiting for the next replacement, thereby realizing continuous dispensing of injection pumps. In addition, the precision dispensing device can also realize micro-dispensing of agent and can flexibly adjust the dispensing speed and dispensing time.

[0021] The above-mentioned technical features can be combined in various suitable ways or replaced by equivalent technical features, as long as the purpose of the present invention can be achieved. Attached Figure Description

[0022] The invention will now be described in more detail based on embodiments that are merely non-limiting and with reference to the accompanying drawings. Wherein:

[0023] Figure 1 , Figure 2 This is a schematic diagram of the structure of a precision dispensing device provided in an embodiment of the present invention;

[0024] Figure 3 This is a schematic diagram of the assembly of the replacement module and the injection pump according to an embodiment of the present invention;

[0025] Figure 4 This is a schematic diagram of the structure of an injection pump. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below. Based on the specific embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0027] The terms "first," "second," and similar words used in this disclosure do not indicate any order, quantity, or importance, but are merely used to distinguish different parts. Words such as "including" or "contains" mean that the element preceding the word encompasses the element listed after it, and do not exclude the possibility of encompassing other elements as well. Terms such as "above," "below," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, this relative positional relationship may also change accordingly.

[0028] In this disclosure, when a specific device is described as being located between a first device and a second device, an intermediary device may or may not be present between the specific device and the first or second device. When a specific device is described as being connected to other devices, the specific device may be directly connected to the other devices without an intermediary device, or it may be not directly connected to the other devices but have an intermediary device.

[0029] like Figures 1 to 3 As shown, the fine dispensing device includes a moving module, a replacement module, and two injection pumps (first injection pump 5 and second injection pump 6).

[0030] The replacement module is used to deliver an empty syringe pump into the reservoir 7 for liquid refilling. It includes a reservoir for storing the liquid to be added and two sets of mounting brackets (first mounting bracket 3 and second mounting bracket 4) for the syringe pump to move vertically. The movement module is used to drive the syringe pump to move between the filling position and the mounting brackets.

[0031] like Figure 4 The injection pump shown mainly consists of three parts: a support frame 51, a drive mechanism 52, and a syringe 53.

[0032] The support frame 51 is used to support the drive mechanism 52 and the syringe 53. The support frame 51 consists of a base plate and two mounting plates arranged on both sides of the base plate and perpendicular to the base plate.

[0033] The drive mechanism 52 includes a stepper motor 521, a lead screw 522, an optical shaft 523, and a slider 524. The stepper motor 521 is fixedly mounted on one of the mounting plates of the support frame 51. The output shaft of the stepper motor 521 is fixedly connected to one end of the lead screw 522, and the other end of the lead screw 522 is rotatably mounted on another mounting plate of the support frame 51. To reduce friction between the lead screw 522 and the mounting plate during rotation, a bearing can be used to connect the lead screw 522 and the mounting plate. Starting the stepper motor 521 will drive the lead screw 522 to rotate. The optical shaft 523 is arranged parallel to the lead screw 522, and its two ends are respectively mounted on two mounting plates of the support frame 51. The slider 524 has a through hole through which the optical shaft 523 can pass and a threaded hole that mates with the lead screw 522. The optical shaft 523 and the lead screw 522 pass through the through hole and the threaded hole on the slider 524, respectively. The optical axis 523 is used to limit the rotation of the slider 524, and the lead screw 522 is used to drive the slider 524 to move linearly. The optical axis 523 can limit the rotation of the slider 524. When the motor drives the lead screw 522 to rotate, the rotation of the lead screw 522 is converted into linear movement of the slider 524 along the lead screw 522 and the optical axis 523. By changing the rotation direction of the stepper motor 521, the slider 524 can be driven to move linearly back and forth along the lead screw 522 and the optical axis 523.

[0034] The syringe 53 includes a syringe barrel 531 and a piston 532. The syringe barrel 531 is fixedly mounted on a mounting plate of the support frame 51 without the stepper motor 521 installed. The mounting plate has a positioning through hole 511. The piston of the syringe is fixed on a slider 525. When the stepper motor 521 is started, it drives the lead screw 522 to rotate, thereby driving the slider 524 to reciprocate along the lead screw 522 and the optical axis 523. The slider 524 connects to and drives the piston of the syringe to reciprocate, thereby causing the syringe 53 to draw or discharge liquid.

[0035] A stepper motor is an electric motor that converts electrical pulse signals into corresponding angular or linear displacement. Each input pulse signal causes the rotor to rotate by an angle or move forward one step. In an injection pump, by providing a specific pulse signal, the stepper motor 521 can rotate at a specific angular velocity to a specific angle. The lead screw 522 then converts the rotational motion into the linear reciprocating motion of the slider 524, causing the injection pump piston 532 to advance a specific distance at a specific speed. This allows for flexible adjustment of the injection speed and injection time.

[0036] The replacement module includes a reservoir for storing the liquid to be added and two sets of mounting brackets for the vertically movable injection pumps (first mounting bracket 3 and second mounting bracket 4).

[0037] Two sets of mounting brackets are arranged side by side above the storage device. The two sets of mounting brackets have the same structure, each consisting of three parts: a mounting base 31, a drive mechanism 32, and a positioning mechanism 33. The mounting base 31 is used to support the drive mechanism 32, and the positioning mechanism 33 is fixed on the drive mechanism 32. The positioning mechanism 33 can be detachably connected to the injection pump. The drive mechanism 32 can drive the positioning mechanism 33 to move up and down, so that the injection port of the injection pump can be inserted into or removed from the liquid in the storage tank 7.

[0038] Specifically, the drive mechanism 32 includes a stepper motor 321, a lead screw 322, an optical shaft 323, and a slider 324. The lead screw 322 and the optical shaft 323 are arranged in parallel. Both ends of the optical shaft 323 are mounted on the mounting base 31, which is used to limit the rotation of the slider 324. One end of the lead screw 322 is rotatably mounted on the mounting base 31. To reduce the friction between the lead screw 322 and the mounting base 31 when rotating, the lead screw 322 and the mounting base 31 can be connected by a bearing. The other end of the lead screw 322 is fixedly connected to the output shaft of the stepper motor 321. The stepper motor 321 is fixed on the mounting base 31. Starting the stepper motor 321 to rotate can drive the lead screw 322 to rotate. The slider 324 is provided with a through hole through which the optical shaft 323 can pass and a screw hole that mates with the lead screw 322. The optical shaft 323 and the lead screw 322 pass through the through hole and the screw hole on the slider 324, respectively. Due to the limiting effect of the optical axis 323, when the stepper motor 321 drives the lead screw 322 to rotate, the rotation of the lead screw 322 is converted into the linear movement of the slider 324 along the lead screw 322 and the optical axis 323. By changing the rotation direction of the stepper motor 321, the slider 324 can be driven to move linearly back and forth along the lead screw 322 and the optical axis 323.

[0039] The positioning mechanism 33 is fixedly mounted on the slider 324 and is used to form a detachable connection with the injection pump. The positioning mechanism 33 consists of two cylindrical bodies that can be inserted into the positioning through holes 411. To improve the connection strength between the positioning mechanism 33 and the injection pump, it is preferable that the positioning mechanism 33 is composed of two cylindrical electromagnets that can be inserted into the positioning holes. When the electromagnets are inserted into the positioning through holes 411 and energized, the positioning mechanism 33 is connected to the injection pump, thereby locking the injection pump; when the electromagnets are de-energized and removed from the positioning through holes 411, the injection pump is detached from the positioning mechanism 33, thereby unlocking the injection pump.

[0040] Stepper motor 321 drives slider 324 to move up and down. Slider 324 drives positioning mechanism 33 and the injection pump locked thereon to move up and down so that the injection port of injection pump can be inserted into or removed from the liquid in storage tank 7.

[0041] The moving module is positioned between the filling position and the replacement module. The moving module includes a first moving bracket 1, a second moving bracket 2, and a positioning mechanism 8. The positioning mechanism 8 is detachably connected to the injection pump. The second moving bracket 2 supports and drives the positioning mechanism 8 to reciprocate along the arrangement direction of the two sets of fixed frames 3 and 4. The second moving bracket 2 is mounted on the first moving bracket 1, which supports and drives the second moving bracket 2 and the positioning mechanism 8 to reciprocate between the filling position and the fixed frames 3 and 4.

[0042] Specifically, the first movable support 1 includes a support frame 11 and two sets of drive mechanisms 12 arranged parallel to the support frame 11. Each drive mechanism 12 includes a stepper motor 121, a lead screw 122, an optical axis 123, and a slider 124. The lead screw 122 and the optical axis 123 are arranged parallel to each other. Both ends of the optical axis 123 are mounted on the support frame 11, and the optical axis 123 is used to limit the rotation of the slider 124. One end of the lead screw 122 is rotatably mounted on the support frame 11. To reduce friction between the lead screw 122 and the support frame 11 during rotation, the lead screw 122 and the support frame 11 can be connected by a bearing. The other end of the lead screw 122 is fixedly connected to the output shaft of the stepper motor 121. The stepper motor 121 is fixed to the support frame 11, and starting the stepper motor 121 to rotate can drive the lead screw 122 to rotate. The slider 124 is provided with a through hole through which the optical axis 123 passes and a screw hole that mates with the lead screw 122. The optical axis 123 and the lead screw 122 pass through the through hole and the screw hole on the slider 124, respectively. Due to the limiting effect of the optical axis 123, when the stepper motor 121 drives the lead screw 122 to rotate, the rotation of the lead screw 122 is converted into linear movement of the slider 124 along the lead screw 122 and the optical axis 123. By changing the rotation direction of the stepper motor 121, the slider 124 can be driven to reciprocate linearly along the lead screw 122 and the optical axis 123.

[0043] The second movable support 2 includes a support frame 21 and a drive mechanism 22 disposed on the support frame 21.

[0044] The drive mechanism 22 includes a stepper motor 221, a lead screw 222, an optical axis 223, and a slider 224. The lead screw 222 and the optical axis 223 are arranged in parallel. Both ends of the optical axis 223 are mounted on the support frame 21, and the optical axis 223 is used to limit the rotation of the slider 224. One end of the lead screw 222 is rotatably mounted on the support frame 21. To reduce the friction between the lead screw 222 and the support frame 21 when rotating, the lead screw 222 and the support frame 21 can be connected by a bearing. The other end of the lead screw 222 is fixedly connected to the output shaft of the stepper motor 221. The stepper motor 221 is fixed on the support frame 21. Starting the stepper motor 221 will drive the lead screw 222 to rotate. The slider 224 is provided with a through hole through which the optical axis 223 can pass and a screw hole that mates with the lead screw 222. The optical axis 223 and the lead screw 222 pass through the through hole and the screw hole on the slider 224, respectively. Due to the limiting effect of the optical axis 223, when the stepper motor 221 drives the lead screw 222 to rotate, the rotation of the lead screw 222 is converted into the linear movement of the slider 224 along the lead screw 222 and the optical axis 223. By changing the rotation direction of the stepper motor 221, the slider 224 can be driven to move linearly back and forth along the lead screw 222 and the optical axis 223.

[0045] The positioning mechanism 8 is mounted on the slider 224 of the second movable support 2. The extension direction of the lead screw 222 on the second movable support 2 is parallel to the arrangement direction of the two sets of fixed frames 3 and 4. The second movable support 2 can drive the positioning mechanism 8 to reciprocate along the arrangement direction of the two sets of fixed frames 3 and 4 to adjust the position of the positioning mechanism 8 so that it can cooperate with the two fixed frames 3 and 4 to replace the injection pump. The support frame 21 of the second movable support 2 is also fixedly mounted on the slider 224 of the two sets of drive mechanisms 12 of the first movable support 1. The extension direction of the lead screw 122 on the first movable support 1 is perpendicular to the extension direction of the lead screw 222 on the second movable support 2. The first movable support 1 drives the second movable support 2 and the positioning mechanism 8 to reciprocate between the injection position and the fixed frames 3 and 4, thereby delivering the injection pump to the injection position or returning it to the fixed frames 3 and 4.

[0046] The positioning mechanism 8 is used to form a detachable connection with the injection pump. The positioning mechanism 8 consists of two cylindrical bodies that can be inserted into the positioning through holes 411. To improve the connection strength between the positioning mechanism 8 and the injection pump, it is preferable that the positioning mechanism 8 is two cylindrical electromagnets that can be inserted into the positioning through holes 411. When the electromagnets are inserted into the positioning through holes 411 and energized, the positioning mechanism 8 is connected to the injection pump, thereby locking the injection pump; when the electromagnets are de-energized and removed from the positioning through holes 411, the injection pump is detached from the positioning mechanism 8, thereby unlocking the injection pump.

[0047] by Figure 1 Taking the precision dispensing device shown as an example, the dispensing operation steps are explained as follows:

[0048] (1) Lock the first injection pump 5 and the second injection pump 6 on the first fixing frame 3 and the second fixing frame 4 respectively. The first fixing frame 3 and the second fixing frame 4 drive the locked injection pumps to move down so that the injection port of the syringe is immersed in the liquid in the liquid storage tank 7. The stepper motor 421 of the injection pump drives the slider 424 through the lead screw 422 to push the piston 432 of the syringe 43 to move up so that the injection pump draws in liquid and completes the liquid filling. The first fixing frame 3 and the second fixing frame 4 drive the first injection pump 5 and the second injection pump 6 after the refilling to move up, waiting for the injection pump to be replaced.

[0049] (2) The positioning mechanism 8 is moved to the front of the first fixed frame 3 by the moving module, so that the first injection pump 5 is locked on the positioning mechanism 8 on the moving module, and the positioning mechanism 33 on the first fixed frame 3 unlocks the first injection pump 5.

[0050] (3) The first injection pump 5 is moved to the injection position by the moving module. The stepper motor of the first injection pump 5 drives the slider through the lead screw to push the syringe piston down so that the first injection pump 5 discharges liquid and completes the injection.

[0051] (4) The first injection pump 5 is sent back to the front of the fixed frame by the moving module, the first fixed frame 3 locks the first injection pump 5, and the moving module unlocks the first injection pump 5.

[0052] (5) Move the positioning mechanism 8 to the front of the second fixed frame 4 by the moving module, so that the positioning mechanism 8 on the moving module locks the second injection pump 6, and at the same time the positioning mechanism 33 on the second fixed frame 4 unlocks the injection pump.

[0053] (6) The second injection pump 6 is moved to the injection position by the moving module. The stepper motor of the second injection pump 6 drives the slider through the lead screw to push the syringe piston down so that the second injection pump 6 discharges liquid and completes the injection.

[0054] (7) The first fixed frame 3 drives the first injection pump 5 to move down so that the injection port of the first injection pump 5 is immersed in the liquid in the storage tank 7. The stepper motor of the first injection pump 5 drives the slider through the lead screw to push the syringe piston up so that the first injection pump 5 draws in liquid and completes the reassembly. The first fixed frame 3 drives the first injection pump 5 after the reassembly to move up, waiting for the injection pump to be replaced next time.

[0055] In this invention, in addition to the electromagnet disclosed in the above embodiments, the positioning mechanism on the moving module and the replacement module can also be a structure such as a gripper cylinder. The gripper cylinder can tighten or loosen the injection pump, thereby locking or unlocking the injection pump. In this case, there is no need to open a positioning through hole on the injection pump.

[0056] Finally, it should be noted that the above embodiments and examples are only used to illustrate the technical solutions of the present invention, and not to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments and examples, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments or examples, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments or examples of the present invention.

Claims

1. A fine dispensing device, characterized in that, The mobile module, the replacement module and at least two injection pumps are included. The replacement module includes a storage device and at least two groups of fixing frames; the storage device is used for storing liquid to be injected; the at least two groups of fixing frames are arranged side by side above the storage device; the fixing frame includes a mounting seat, a driving mechanism and a positioning mechanism; the driving mechanism is arranged on the mounting seat; the positioning mechanism of the fixing frame is detachably connected with the injection pump; the driving mechanism is used for supporting and driving the positioning mechanism of the fixing frame to move up and down so that the injection port of the injection pump on the positioning mechanism of the fixing frame is inserted into or removed from the liquid in the storage device. The mobile module includes a first mobile support, a second mobile support and a positioning mechanism; the positioning mechanism of the mobile module is detachably connected with the injection pump; the positioning mechanism of the mobile module is arranged on the second mobile support; the second mobile support is used for supporting and driving the positioning mechanism of the mobile module to reciprocally move along the arrangement direction of the at least two groups of fixing frames; the second mobile support is arranged on the first mobile support; the first mobile support is used for supporting and driving the second mobile support and the positioning mechanism of the mobile module to reciprocally move between the injection position and the fixing frame. The injection pump is provided with at least two positioning through holes; the positioning mechanism of the fixing frame and the positioning mechanism of the mobile module include at least two electromagnets which can be inserted into the positioning through holes. The first mobile support and the second mobile support each include a support frame and a driving mechanism arranged on the support frame; the injection pump includes a support frame, a driving mechanism and a syringe.

2. The precision dispensing device of claim 1, wherein The driving mechanism of the fixing frame includes a motor, a screw rod, a light shaft and a sliding block; the screw rod and the light shaft are arranged in parallel on the mounting seat; the motor is fixed on the mounting seat and connected with the screw rod; the sliding block is provided with a through hole through which the light shaft passes and a screw hole matched with the screw rod; the light shaft and the screw rod pass through the through hole and the screw hole on the sliding block respectively; the positioning mechanism of the fixing frame is arranged on the sliding block; the motor is used for driving the screw rod to rotate so as to drive the sliding block to reciprocally move along the screw rod and the light shaft.

3. The precision dispensing device of claim 1, wherein The driving mechanism of the fixing frame includes a motor, a screw rod, a sliding groove and a sliding block; the screw rod and the sliding groove are arranged in parallel on the mounting seat; the motor is fixed on the mounting seat and connected with the screw rod; the sliding block is partially arranged in the sliding groove; the sliding block is provided with a screw hole matched with the screw rod; the screw rod passes through the screw hole; the positioning mechanism of the fixing frame is arranged on the sliding block; the motor is used for driving the screw rod to rotate so as to drive the sliding block to reciprocally move along the screw rod and the sliding groove.

4. The precision dispensing device of claim 1, wherein The driving mechanism comprises a motor, a screw rod, a light shaft and a sliding block, the screw rod and the light shaft are arranged in parallel on the support frame of the first and second moving supports, the motor is fixed on the support frame of the first and second moving supports and connected with the screw rod, the sliding block is provided with a through hole through which the light shaft passes and a screw hole matched with the screw rod, the light shaft and the screw rod pass through the through hole and the screw hole of the sliding block respectively, and the motor is used to drive the screw rod to rotate so as to drive the sliding block to move reciprocatingly along the screw rod and the light shaft. The support frame of the second moving support is fixedly installed on the sliding block of the first moving support, the extension direction of the screw rod of the second moving support is parallel to the arrangement direction of the at least two groups of fixing frames, the extension direction of the screw rod of the first moving support is perpendicular to the extension direction of the screw rod of the second moving support, and the positioning mechanism of the moving module is arranged on the sliding block of the second moving support.

5. The precision dispensing device of claim 1, wherein The driving mechanism comprises a motor, a screw rod, a sliding groove and a sliding block, the screw rod and the sliding groove are arranged in parallel on the support frame of the first and second moving supports, the motor is fixed on the support frame of the first and second moving supports and connected with the screw rod, the sliding block is partially arranged in the sliding groove, the sliding block is provided with a screw hole matched with the screw rod, the screw rod passes through the screw hole, and the motor is used to drive the screw rod to rotate so as to drive the sliding block to move reciprocatingly along the screw rod and the sliding groove. The support frame of the second moving support is fixedly installed on the sliding block of the first moving support, the extension direction of the screw rod of the second moving support is parallel to the arrangement direction of the at least two groups of fixing frames, the extension direction of the screw rod of the first moving support is perpendicular to the extension direction of the screw rod of the second moving support, and the positioning mechanism of the moving module is arranged on the sliding block of the second moving support.

6. A precision dispensing device according to claim 4 or 5, characterised in that The first moving support comprises two groups of driving mechanisms, and the two groups of driving mechanisms are arranged in parallel on the support frame of the first moving support.

7. The precision dispensing device of claim 1, wherein The driving mechanism comprises a stepping motor, a screw rod, a light shaft and a sliding block, the screw rod and the light shaft are arranged in parallel on the support frame of the injection pump, the stepping motor and the syringe are fixedly installed on the support frames at the two ends of the screw rod respectively, the stepping motor is connected with the screw rod, the sliding block is provided with a through hole through which the light shaft passes and a screw hole matched with the screw rod, the light shaft and the screw rod pass through the through hole and the screw hole of the sliding block respectively, the stepping motor is used to drive the screw rod to rotate so as to drive the sliding block to move reciprocatingly along the screw rod and the light shaft, the sliding block is connected with and drives the piston of the syringe to move reciprocatingly, so that the syringe sucks liquid or discharges liquid.

8. The precision dispensing device of claim 1, wherein, The driving mechanism comprises a stepping motor, a screw rod, a sliding groove and a sliding block. The screw rod and the sliding groove are arranged in parallel on the support frame of the injection pump, the stepping motor and the injector are respectively fixedly installed on the support frames at two ends of the screw rod, the stepping motor is connected with the screw rod, the sliding block is arranged in the sliding groove, a screw hole matched with the screw rod is arranged on the sliding block, the screw rod passes through the screw hole, the positioning mechanism of the fixed frame is arranged on the sliding block, the motor is used for driving the screw rod to rotate so as to drive the sliding block to reciprocate along the screw rod and the sliding groove, the sliding block is connected and drives the piston of the injector to reciprocate, so that the injector sucks liquid or discharges liquid.

9. A precision dispensing device according to claim 7 or 8, characterised in that The support frame of the injection pump is provided with at least two positioning through holes, and the positioning mechanism of the fixed frame and the positioning mechanism of the moving module comprise at least two electromagnets which can be inserted into the positioning through holes.

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