Full-automatic blood purification adsorbent filling device

Abstract

The utility model discloses a full-automatic blood purification adsorbent filling device, and belongs to the technical field of blood purification. The water is positioned on the upper layer of the adsorbent; a liquid outlet is formed in the lower end of the hopper; a liquid inlet of the plunger type cylinder is connected with a liquid outlet in the lower end of the hopper, and a liquid outlet of the plunger type cylinder is connected with a filling head; a liquid inlet of the water injection pump is connected with a water source, and a liquid outlet of the water injection pump is connected with a liquid inlet in the upper end of the hopper. A liquid inlet one-way valve is connected to a liquid inlet of the plunger type cylinder, and a liquid outlet one-way valve is connected to a liquid outlet of the plunger type cylinder. According to the utility model, the servo electric cylinder drives the piston assembly in the plunger type cylinder to reciprocate, so that quantitative suction and extrusion of an adsorbent are realized, the filling accuracy and efficiency are greatly improved, and long-time stable and accurate filling operation can be ensured; the arrangement of the liquid inlet one-way valve and the liquid outlet one-way valve ensures the one-way flow of the adsorbent, and avoids the backflow problem.

Description

Technical Field

[0001] This utility model relates to the field of blood purification technology, specifically to a fully automatic blood purification adsorbent filling device. Background Technology

[0002] Hemoperfusion devices, as key equipment in modern medicine, are widely used to adsorb and remove pathogenic substances from human blood, playing an irreplaceable role in the treatment of related diseases. Their structure mainly consists of an outer shell, an internally filled adsorbent (usually made of spherical polymer material), and necessary liquid. The adsorbent, as the core component of the hemoperfusion device, directly affects the blood purification effect and the patient's treatment outcome due to its performance and filling accuracy.

[0003] However, there are many inconveniences in the traditional adsorbent filling process: on the one hand, the filling amount of adsorbent is often difficult to control precisely, which may cause the perfusion device to fail to achieve the expected therapeutic effect in actual application; on the other hand, the adsorbent is easily contaminated during the filling process, which will not only reduce its adsorption performance, but may also pose a potential threat to the health of patients. Utility Model Content

[0004] The purpose of this invention is to provide a fully automatic blood purification adsorbent filling device for quantitative filling of the adsorbent in the perfusion device.

[0005] This utility model adopts the following technical solution: a fully automatic blood purification adsorbent filling device, comprising:

[0006] The hopper contains adsorbent and water, with water located on top of the adsorbent; the upper end of the hopper has a liquid inlet, and the lower end of the hopper has a liquid outlet.

[0007] A plunger cylinder, wherein the inlet of the plunger cylinder is connected to the outlet of the lower end of the hopper, and the outlet of the plunger cylinder is connected to a filling head;

[0008] A water injection pump, wherein the inlet of the water injection pump is connected to a water source, and the outlet of the water injection pump is connected to the inlet at the top of the hopper.

[0009] Preferably, the upper end of the hopper is connected to a vent valve.

[0010] Preferably, the plunger cylinder has an inlet check valve connected to its inlet and an outlet check valve connected to its outlet.

[0011] Preferably, a separator membrane is fixed in the rodless chamber of the plunger cylinder, which divides the rod chamber of the plunger cylinder into a front chamber and a rear chamber; the piston of the plunger cylinder is connected to the rear chamber, and the inlet and outlet of the plunger cylinder are connected to the front chamber.

[0012] Preferably, the plunger cylinder comprises:

[0013] A large cylinder body, wherein the partition membrane is fixed in the middle of the large cylinder body, and the front cavity and the rear cavity are respectively on both sides of the partition membrane;

[0014] A small cylinder body is fixed to one end of the large cylinder body and communicates with the rear cavity; the diameter of the small cylinder body is smaller than the diameter of the large cylinder body;

[0015] The piston is slidably mounted in the small cylinder.

[0016] The piston rod is fixedly connected to the side of the piston away from the rear chamber.

[0017] Preferably, the end of the piston rod away from the piston is connected to a power assembly, which is used to drive the piston rod and the piston to slide back and forth along the small cylinder.

[0018] Preferably, the power component is a servo electric cylinder.

[0019] Preferably, the large cylinder body includes a large cylindrical body and front sealing plates and rear sealing plates fixed at both ends of the large cylindrical body; a ring of positioning bosses is fixed on the inner wall of the large cylindrical body;

[0020] A pressure ring is fixed to the side of the positioning boss near the rear cavity, and the periphery of the separator membrane is positioned between the pressure ring and the positioning boss.

[0021] Preferably, the rear sealing plate has a through hole in its center;

[0022] The small cylinder includes a small cylindrical body fixed at the through hole of the rear sealing plate, and a sealing cap is fixed at the end of the small cylindrical body away from the rear sealing plate. The piston rod slides through the sealing cap.

[0023] Preferably, the upper side of the front sealing plate is connected to an inlet pipe, and the lower side of the front sealing plate is connected to an outlet pipe.

[0024] The beneficial effects of this utility model are as follows:

[0025] The reciprocating motion of the piston assembly in the plunger cylinder driven by the servo electric cylinder enables the quantitative intake and extrusion of the adsorbent, greatly improving the accuracy and efficiency of filling. The setting of the liquid inlet check valve and the liquid outlet check valve ensures the unidirectional flow of the adsorbent and avoids backflow problems. Through the continuous drive and precise control of the servo electric cylinder, stable and accurate filling operations can be ensured for a long time, realizing uninterrupted quantitative filling operations.

[0026] A separator membrane is installed inside the plunger cylinder to separate the adsorbent from the working oil and piston assembly. This effectively avoids adsorbent contamination caused by piston assembly leakage, prevents adsorbent corrosion of the piston assembly, extends the service life of the device, and facilitates maintenance and use. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of the structure of a fully automatic blood purification adsorbent filling device according to the present invention.

[0029] Figure 2 This is a perspective view of the plunger cylinder of this utility model.

[0030] Figure 3 This is the front view of the plunger cylinder in this utility model.

[0031] Figure 4 This is a left view of the piston cylinder of this utility model.

[0032] Figure 5 for Figure 4 View from AA.

[0033] Figure 6 for Figure 5 Enlarged view of point B in the middle.

[0034] Explanation of reference numerals in the attached diagram: 1. Hopper; 2. Plunger cylinder; 3. Filling head; 4. Water pump; 5. Vent valve; 6. Inlet check valve; 7. Outlet check valve;

[0035] 21. Separator membrane; 211. Pressure ring; 22. Front chamber; 23. Rear chamber; 24. Large cylinder; 241. Large cylindrical body; 242. Front sealing plate; 243. Rear sealing plate; 244. Positioning boss; 25. Small cylinder; 251. Small cylindrical body; 252. Sealing cap; 26. Piston; 27. Piston rod; 28. Power assembly; 291. Inlet pipe; 292. Outlet pipe. Detailed Implementation

[0036] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0037] Example 1:

[0038] like Figure 1As shown, this utility model provides a fully automatic blood purification adsorbent filling device, mainly including a hopper 1, a plunger cylinder 2, and a water injection pump 4. The hopper 1 holds the adsorbent and water. Since water has a lower density than the adsorbent, the water is located on top of the adsorbent. The hopper 1 has a feed inlet at its upper end for replenishing the adsorbent, and a liquid inlet at its upper end, which connects to the outlet of the water injection pump 4. The inlet of the water injection pump 4 is connected to a water source for replenishing or pumping water. In actual operation, the water injection pump 4 only needs to maintain a certain water level on top of the adsorbent; it does not need to operate continuously.

[0039] A vent valve 5 is connected to the upper end of hopper 1 to balance the air pressure inside hopper 1. A liquid outlet is opened at the lower end of hopper 1, which is connected to the liquid inlet of plunger cylinder 2. A filling head 3 is connected to the liquid outlet of plunger cylinder 2, which is used to fill a fixed amount of adsorbent into the perfusion device. An inlet check valve 6 is connected to the pipe at the liquid inlet of plunger cylinder 2, and an outlet check valve 7 is connected to the pipe at the liquid outlet of plunger cylinder 2. By setting the inlet check valve 6 and the outlet check valve 7, it is ensured that the adsorbent can only enter plunger cylinder 2 in one direction through the inlet check valve 6 and flow out of plunger cylinder 2 in one direction through the outlet check valve 7. During operation, a fixed amount of adsorbent can be drawn in through plunger cylinder 2, and then extruded through the filling head 3 into the perfusion device.

[0040] Example 2:

[0041] Based on the above embodiment one, combined with Figures 2 to 6 As shown, a separator 21 is fixed in the rodless chamber of the plunger cylinder 2, dividing the rod chamber of the plunger cylinder 2 into a front chamber 22 and a rear chamber 23. The piston assembly and working fluid are located on one side of the rear chamber 23; the inlet and outlet are located on one side of the front chamber 22, connected to an inlet check valve 6 and an outlet check valve 7, respectively, for drawing in and expelling the adsorbent. By using the separator 21, the adsorbent is separated from the piston assembly and working fluid, avoiding contamination of the adsorbent due to leakage at the piston assembly, and also preventing corrosion of the piston assembly by the adsorbent.

[0042] The plunger cylinder 2 mainly includes a large cylinder body 24, a small cylinder body 25, and a piston assembly;

[0043] The large cylinder 24 includes a large cylindrical body 241. A front sealing plate 242 and a rear sealing plate 243 are fixed to both ends of the large cylindrical body 241 via flanges and bolts. An inlet pipe 291 is connected to the upper side of the front sealing plate 242, and an outlet pipe 292 is connected to the lower side of the front sealing plate 242. In use, the inlet pipe 291 is connected to an inlet check valve 6, and the outlet pipe 292 is connected to an outlet check valve 7. A through hole is provided in the center of the rear sealing plate 243 for connecting to the small cylinder 25. A positioning boss 244 is welded and fixed to the middle of the inner wall of the large cylindrical body 241. A pressure ring 211 is fixed to the positioning boss 244 near the rear cavity 23 via studs and bolts. The periphery of the separator membrane 21 is inserted onto the studs and is positioned by the pressure ring 211 and the positioning boss 244.

[0044] The small cylinder body 25 includes a small cylindrical body 251, the diameter of which is smaller than that of the large cylinder body 24. One end of the small cylindrical body 251 is fixed to the through hole of the rear sealing plate 243 by a flange and bolts, and the other end of the small cylindrical body 251 is fixed with a sealing cap 252, which has a central opening.

[0045] The piston assembly includes a piston 26 that is slidably mounted in a small cylinder 25, and the piston 26 slides only within the small cylinder 25. A piston rod 27 is fixedly connected to the side of the piston 26 away from the rear chamber 23, and the piston rod 27 slides through the central hole of the cap 252. The rear chamber 23 between the piston 26 and the separator membrane 21 is filled with working oil; thus, when the piston 26 slides back and forth, the separator membrane 21 undergoes lateral deformation, completing the adsorbent suction and extrusion operation.

[0046] Example 3:

[0047] Based on the above-described embodiment two, combined with Figures 2 to 5 As shown, the power assembly 28 includes a servo cylinder fixed at the cap 252, and the output end of the servo cylinder is fixedly connected to the piston rod 27. The servo cylinder can drive the piston rod 27 and the piston 26 to slide back and forth along the small cylinder 25. Through calibration, the adsorbent intake and extrusion volume corresponding to the left and right reciprocating strokes of the servo cylinder can be obtained, thereby realizing the quantitative filling operation of the adsorbent.

[0048] Working principle:

[0049] Hopper 1 holds the adsorbent, and water pump 4 adds water to hopper 1 to ensure that there is a certain water layer on the upper part of the adsorbent.

[0050] During quantitative filling operations;

[0051] Combination Figure 1 and Figure 5As shown, the electric cylinder drives the piston rod 27 and piston 26 to move a certain distance to the left along the small cylinder 25, the separator 21 deforms to the left, the volume of the front chamber 22 increases, and a certain amount of adsorbent in the hopper 1 enters the front chamber 22 through the liquid inlet check valve 6; then, the electric cylinder drives the piston rod 27 and piston 26 to move a certain distance to the right along the small cylinder 25, the separator 21 deforms to the right, the volume of the front chamber 22 decreases, and a certain amount of adsorbent in the front chamber 22 is squeezed out into the filler through the liquid outlet check valve 7 and the filling head 3 to achieve quantitative filling; this process is repeated to achieve uninterrupted quantitative filling operation.

[0052] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.

Claims

1. A fully automatic blood purification adsorbent filling device, characterized by, The utility model relates to a kind of filling device, including: Hopper, the hopper is loaded with adsorbent and water, water is located adsorbent upper layer;Hopper upper end has liquid inlet, and hopper lower end has liquid outlet; Plunger cylinder, the liquid inlet of plunger cylinder is connected the liquid outlet of the lower end of the hopper, and the liquid outlet of plunger cylinder is connected with filling head; Water injection pump, the liquid inlet of water injection pump is connected water source, and the liquid outlet of water injection pump is connected the liquid inlet of the upper end of the hopper.

2. The full-automatic blood purification adsorbent filling device according to claim 1, characterized in that: The upper end of the hopper is connected with air valve.

3. The full-automatic blood purification adsorbent filling device according to claim 1, characterized in that: The liquid inlet of plunger cylinder is connected with liquid inlet one-way valve, and the liquid outlet of plunger cylinder is connected with liquid outlet one-way valve.

4. The fully automatic blood purification adsorbent filling device according to claim 1, characterized in that: Rodless cavity of the plunger cylinder is fixed with separation membrane, and separation membrane divides the rod cavity of plunger cylinder into front cavity and rear cavity;The piston of plunger cylinder communicates rear cavity, and the liquid inlet, liquid outlet of plunger cylinder communicates front cavity.

5. The fully automatic blood purification adsorbent filling device according to claim 4, characterized by The plunger cylinder includes: Large cylinder body, the middle part of large cylinder body is fixed with the separation membrane, and the two sides of separation membrane are the front cavity and the rear cavity respectively; Small cylinder body, fixed in one end of the large cylinder body and communicated with rear cavity;The diameter of small cylinder body is less than the diameter of large cylinder body; Piston, sliding fit installation in small cylinder body; Piston rod, fixed connection in the side of piston away from rear cavity.

6. The fully automatic blood purification adsorbent filling device according to claim 5, characterized in that: The end of piston rod away from piston is connected with power component, and power component is used to drive piston rod and piston reciprocating sliding along small cylinder body.

7. The fully automatic blood purification adsorbent filling device according to claim 6, characterized in that: The power component is private service electric cylinder.

8. The fully automatic blood purification adsorbent filling device according to claim 5, characterized in that: The large cylinder body includes large barrel body and front sealing plate, rear sealing plate fixed in both ends of large barrel body;The inner wall of large barrel body is fixed with a circle of positioning boss; The side of positioning boss close to rear cavity is fixed with compression ring, and separation membrane periphery is positioned between compression ring and positioning boss.

9. The fully automatic blood purification adsorbent filling device according to claim 8, characterized in that: The center of rear sealing plate is provided with through hole; Small cylinder body, small cylinder body is fixed in the through hole of rear sealing plate, and cover is fixed in the end of small cylinder body away from rear sealing plate, and piston rod slides through cover.

10. The fully automatic blood purification adsorbent filling device according to claim 8, characterized in that: The upper side of front sealing plate is connected with liquid inlet pipe, and the lower side of front sealing plate is connected with liquid outlet pipe.

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