Calibration gauge for heparin pump of dialysis machine

Abstract

The utility model provides a heparin pump calibration gauge of a dialysis machine, and belongs to the technical field of dialysis machines. The heparin pump calibration gauge of the dialysis machine comprises a dialysis machine assembly and a calibration assembly, the calibration assembly comprises a pipe body, a piston rod, a high-precision spring, an adjusting limiting block and a pressing head, and the heparin pump calibration gauge of the dialysis machine is provided with a dialysis machine main body, a heparin pump main body, the pipe body, the piston rod, the high-precision spring, the adjusting limiting block and the pressing head; the calibration assembly is installed on the heparin pump body to simulate the normal use condition, the heparin pump body drives the piston rod to move through the linear relation between the elastic force of the high-precision spring and the compression stroke, the piston rod drives the adjusting limiting block to move to extrude the high-precision spring, and the high-precision spring is extruded to move to the stroke corresponding to the pressure needed by the alarm limit value. And then the pressure value of the pressure sensor of the pump head is recorded to serve as the alarm limit value for alarm limit value calibration, errors caused by manual operation are avoided, the final finished product is calibrated, and a calibration result which is more accurate and more practical is achieved.

Description

Technical Field

[0001] The present application relates to the field of dialysis machines, and in particular to a heparin pump calibration gauge for a dialysis machine. Background Art

[0002] The hemodialysis machine can be roughly divided into two parts: the blood monitoring alarm system and the dialysate supply system. The blood monitoring alarm system includes a blood pump, a heparin pump, arteriovenous pressure monitoring, and air monitoring, etc. The dialysate supply system includes a temperature control system, a liquid preparation system, a degassing system, a conductivity monitoring system, an ultrafiltration monitoring system, and a blood leakage monitoring system.

[0003] The heparin pump monitors the pressure in the syringe through the pressure sensor built into the pump head. Once the pressure exceeds the alarm limit, an alarm will be sounded through the dialysis machine's alarm system, prompting medical staff to check whether the syringe pipeline is blocked. Since there are differences in each batch of pressure sensors, resulting in differences in pressure measurement values, the pressure sensor needs to be calibrated before leaving the factory, so that the heparin pump can monitor the pressure more accurately and better ensure the safety of patients. The existing technology is calibrated manually by manually applying a specific force to the pressure sensor with a thrust gauge, and then recording the force value in the control system.

[0004] Some methods are time-consuming and labor-intensive, and they also introduce human errors due to the operation techniques. Moreover, this method ignores the impact of the assembly process on the results, that is, the pressure sensor itself is calibrated, but it cannot be guaranteed that after assembly, the gap between parts, assembly accuracy, etc. will affect the final monitoring of the occlusion pressure by the heparin pump. Utility Model Content

[0005] In order to make up for the above shortcomings, the present application provides a heparin pump calibration gauge for a dialysis machine, aiming to improve the problems raised in the above background technology.

[0006] An embodiment of the present application provides a heparin pump calibration gauge for a dialysis machine, comprising a dialysis machine component and a calibration component.

[0007] The dialysis machine assembly includes a dialysis machine body and a heparin pump body, and the heparin pump body is arranged on one side of the dialysis machine body.

[0008] The calibration assembly includes a tube body, a piston rod, a high-precision spring, an adjustment limit block and a pressing head. The tube body is clamped on the outside of the heparin pump body, one end of the piston rod is slidably arranged in the tube body, the high-precision spring is sleeved on the surface of the piston rod, the adjustment limit block is arranged on the surface of the piston rod, the pressing head is installed on the end of the piston rod, and the pressing head is clamped on the movable end of the heparin pump body.

[0009] In a specific embodiment, the tube body is provided with a notch, and a scale line is arranged in the notch.

[0010] In the above implementation process, the notch and the scale line are provided to observe the displacement distance of the piston rod for verification.

[0011] In a specific embodiment, a movable piston is provided at the end of the piston rod, and the movable piston slides against the inner wall of the tube body, and the diameter of the movable piston is larger than that of the piston rod.

[0012] In the above implementation process, the movable piston is arranged to slide against the inner wall of the tube body to ensure stable linear sliding of the piston rod, and the movable piston cannot separate from the tube body, thereby preventing the piston rod from separating.

[0013] In a specific implementation, the adjustment limit block includes a sliding ring and a positioning knob, the sliding ring is slidably mounted on the surface of the piston rod and abuts against the high-precision spring, and the positioning knob thread passes through the sliding ring and abuts against the piston rod.

[0014] In the above implementation process, by setting the sliding ring and the positioning knob, the sliding ring can be moved to adjust the position, and then the positioning knob can be used to tighten and position it to adjust the initial pressure of the high-precision spring.

[0015] In a specific implementation, the pressing head is provided with a thread groove and is threadedly connected to the end of the piston rod.

[0016] In the above implementation process, the pressing head and the piston rod end are installed by threaded connection, which makes it easy to disassemble and assemble the sliding ring, the positioning knob and the pressing head, and further facilitates the disassembly and replacement of the high-precision spring.

[0017] In a specific embodiment, a limiting ring is arranged on the outside of the tube body, a limiting groove is provided on the outside of the heparin pump body, and the limiting ring is inserted into the limiting groove.

[0018] In the above implementation process, the position of the tube body on the heparin pump body is positioned by inserting the limiting ring into the limiting groove.

[0019] In a specific embodiment, a slot is provided at the movable end of the heparin pump body, and the pressing head is flat and inserted into the slot.

[0020] In the above implementation process, when the movable end of the heparin pump body moves, it can stably drive the pressing head to move.

[0021] In a specific embodiment, the tube body is a stainless steel tube, and the piston rod is a stainless steel rod.

[0022] Beneficial effects: The present application provides a heparin pump calibration gauge for a dialysis machine. By setting a dialysis machine body, a heparin pump body, a tube body, a piston rod, a high-precision spring, an adjustment limit block and a pressing head, the calibration assembly is installed on the heparin pump body to simulate normal use conditions. By utilizing the linear relationship between the elastic force and the compression stroke of the high-precision spring, the heparin pump body drives the piston rod to move, and the piston rod drives the adjustment limit block to move and squeeze the high-precision spring, and the squeezing moves to the stroke corresponding to the pressure required for the alarm limit, and then the pressure value of the pressure sensor of the pump head is recorded as the alarm limit for the alarm limit calibration, thereby avoiding errors in manual operation, and calibrating the final product to achieve a more accurate and more practical calibration result. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the implementation methods of the present application, the drawings required for use in the implementation methods will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 It is a schematic diagram of the structure of a heparin pump calibration gauge for a dialysis machine provided in an embodiment of the present application;

[0025] Figure 2 A schematic diagram of the main structure of a heparin pump provided in an embodiment of the present application;

[0026] Figure 3 A schematic diagram of the calibration component structure provided in an embodiment of the present application;

[0027] Figure 4 A schematic diagram of the adjustment limit block structure provided in an embodiment of the present application.

[0028] In the figure: 100-dialysis machine assembly; 110-dialysis machine body; 120-heparin pump body; 122-limiting groove; 123-slot; 200-calibration assembly; 210-tube body; 211-notch; 212-limiting ring; 220-piston rod; 221-moving piston; 230-high-precision spring; 250-adjusting limit block; 251-sliding ring; 252-positioning knob; 270-pressing head. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments.

[0030] See also Figure 1-Figure 4The present application provides a heparin pump calibration gauge for a dialysis machine, including a dialysis machine component 100 and a calibration component 200 .

[0031] See also Figure 1 and 2 The dialyzer assembly 100 includes a dialyzer body 110 and a heparin pump body 120 , and the heparin pump body 120 is disposed on one side of the dialyzer body 110 .

[0032] See also Figure 1 , 2 , 3 and 4, the calibration assembly 200 includes a tube body 210, a piston rod 220, a high-precision spring 230, an adjustment limit block 250 and a pressing head 270, the tube body 210 is clamped on the outside of the heparin pump body 120, one end of the piston rod 220 is slidably set in the tube body 210, the high-precision spring 230 is sleeved on the surface of the piston rod 220, the adjustment limit block 250 is set on the surface of the piston rod 220, the pressing head 270 is installed on the end of the piston rod 220, and the pressing head 270 is clamped on the movable end of the heparin pump body 120.

[0033] The tube body 210 is provided with a notch 211 , and scale lines are arranged in the notch 211 . The notch 211 and the scale lines are provided to observe the displacement distance of the piston rod 220 for verification.

[0034] Specifically, a movable piston 221 is provided at the end of the piston rod 220. The movable piston 221 slides against the inner wall of the tube body 210. The diameter of the movable piston 221 is larger than that of the piston rod 220. The movable piston 221 slides against the inner wall of the tube body 210 to ensure stable linear sliding of the piston rod 220. At the same time, the movable piston 221 cannot be separated from the tube body 210, thereby preventing the piston rod 220 from detaching.

[0035] In this embodiment, the adjustment limit block 250 includes a sliding ring 251 and a positioning knob 252. The sliding ring 251 is slidably mounted on the surface of the piston rod 220 and abuts against the high-precision spring 230. The positioning knob 252 is threaded through the sliding ring 251 and abuts against the piston rod 220. By setting the sliding ring 251 and the positioning knob 252, the sliding ring 251 can be moved to adjust the position, and then the positioning knob 252 can be used to tighten and position it to adjust the initial pressure of the high-precision spring 230.

[0036] In a specific implementation scheme, the pressing head 270 is provided with a threaded groove and is threadedly connected to the end of the piston rod 220. The pressing head 270 and the end of the piston rod 220 are installed by threaded connection, thereby facilitating the disassembly and assembly of the sliding ring 251, the positioning knob 252 and the pressing head 270, and further facilitating the disassembly and assembly of the high-precision spring 230.

[0037] Among them, a limiting ring 212 is set on the outside of the tube body 210, and a limiting groove 122 is opened on the outside of the heparin pump body 120. The limiting ring 212 is inserted into the limiting groove 122. By setting the limiting ring 212 to be inserted into the limiting groove 122, the position of the tube body 210 on the heparin pump body 120 is positioned.

[0038] It should be noted that a slot 123 is provided at the movable end of the heparin pump body 120 , and the pressing head 270 is flat and inserted into the slot 123 , so as to stably drive the pressing head 270 to move when the movable end of the heparin pump body 120 moves.

[0039] In a specific embodiment, the tube body 210 is a stainless steel tube, and the piston rod 220 is a stainless steel rod.

[0040] It should be noted that the dialysis machine body 110 and the heparin pump body 120 are prior art, and the pressure sensor installed on the pump head is also prior art, and the specific principles and mechanisms are not elaborated here.

[0041] The working principle of the heparin pump calibration gauge of the dialysis machine is as follows: when in use, the calibration component 200 is installed on the heparin pump body 120, the limiting ring 212 is inserted into the limiting groove 122, the pressing head 270 is inserted into the slot 123, and the side baffle is rotated to block the tube body 210, and the heparin pump body 120 is controlled to start, and the active end of the heparin pump body 120 stably drives the pressing head 270 to move, and the pressing head 270 pushes the piston rod 220 to move, and the piston rod 220 drives the movable piston 221 to move along the tube body 210, and the piston rod 220 drives the movable piston 221 to move along the tube body 210. The dynamic sliding ring 251 squeezes the high-precision spring 230, which controls the moving distance of the heparin pump body 120 on the one hand, and observes the corresponding scale line of the moving piston 221 on the other hand, squeezes the high-precision spring 230 to move to the stroke corresponding to the pressure required for the alarm limit, and then records the pressure value of the pressure sensor of the pump head as the alarm limit for alarm limit calibration, avoiding errors in manual operation, and calibrating the final product, taking into account errors such as the gap between parts and the accuracy of assembly, to achieve a more accurate and practical calibration result.

[0042] It should be noted that the specific model specifications of the dialysis machine body 110 and the heparin pump body 120 need to be selected and determined according to the actual specifications of the device, and the specific selection calculation method adopts the existing technology in the field, so it will not be described in detail.

[0043] The power supply and principle of the dialysis machine body 110 and the heparin pump body 120 are clear to those skilled in the art and will not be described in detail here.

[0044] It is obvious to those skilled in the art that the present application is not limited to the details of the exemplary embodiments described above, and that the present application can be implemented in other specific forms without departing from the spirit or essential features of the present application. Therefore, the embodiments should be regarded as exemplary and non-limiting in all respects, and the scope of the present application is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present application. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. Dialysis machine heparin pump calibration gauge, characterized in that, include A dialysis machine assembly (100), the dialysis machine assembly (100) comprising a dialysis machine body (110) and a heparin pump body (120), the heparin pump body (120) being arranged on one side of the dialysis machine body (110); A calibration component (200), the calibration component (200) comprising a tube body (210), a piston rod (220), a high-precision spring (230), an adjustment limit block (250) and a pressing head (270), wherein the tube body (210) is clamped on the outside of the heparin pump body (120), one end of the piston rod (220) is slidably arranged in the tube body (210), the high-precision spring (230) is sleeved on the surface of the piston rod (220), the adjustment limit block (250) is arranged on the surface of the piston rod (220), the pressing head (270) is installed on the end of the piston rod (220), and the pressing head (270) is clamped on the movable end of the heparin pump body (120).

2. The heparin pump calibration gauge for a dialysis machine according to claim 1, characterized in that: The tube body (210) is provided with a notch (211), and scale lines are arranged in the notch (211).

3. The heparin pump calibration gauge for a dialysis machine according to claim 1, characterized in that: A movable piston (221) is provided at the end of the piston rod (220). The movable piston (221) slides against the inner wall of the tube body (210). The diameter of the movable piston (221) is larger than that of the piston rod (220).

4. The heparin pump calibration gauge for a dialysis machine according to claim 1, characterized in that: The adjustment limit block (250) comprises a sliding ring (251) and a positioning knob (252); the sliding ring (251) is slidably sleeved on the surface of the piston rod (220) and abuts against the high-precision spring (230); the positioning knob (252) is threadedly passed through the sliding ring (251) and abuts against the piston rod (220).

5. The heparin pump calibration gauge for a dialysis machine according to claim 1, characterized in that: The pressing head (270) is provided with a thread groove and is threadedly connected to the end of the piston rod (220).

6. The heparin pump calibration gauge for a dialysis machine according to claim 1, characterized in that: A limiting ring (212) is arranged on the outside of the tube body (210), a limiting groove (122) is provided on the outside of the heparin pump body (120), and the limiting ring (212) is inserted into the limiting groove (122).

7. The heparin pump calibration gauge for a dialysis machine according to claim 1, characterized in that: A slot (123) is provided at the movable end of the heparin pump body (120), and the pressing head (270) is flat and inserted into the slot (123).

8. The heparin pump calibration gauge for a dialysis machine according to claim 1, characterized in that: The tube body (210) is a stainless steel tube, and the piston rod (220) is a stainless steel rod.

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