Diaphragm type pressure sensor detection device for blood purification equipment

Abstract

The utility model discloses a diaphragm type pressure sensor detection device for blood purification equipment, which comprises a base, a sensor assembly, a pressing assembly and a control unit, the sensor assembly comprises a sensor mounting seat arranged in the containing cavity and used for being connected with a sensor shell and a pressure sensor arranged in the sensor mounting seat, the pressure sensor is used for detecting elastic deformation of a diaphragm in the sensor shell and converting the elastic deformation into an electric signal, and the pressing assembly is located above the base; and the control unit is used for pressing the sensor shell on the sensor mounting seat, receiving the electric signal converted by the pressure sensor and analyzing the precision of the diaphragm. According to the diaphragm type pressure sensor detection device for the blood purification equipment, the precision of the diaphragm can be detected, potential sensor faults can be found and eliminated in time, and the safety and effectiveness of blood purification treatment are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of medical equipment, in particular to a diaphragm pressure sensor detection device used for blood purification equipment. Background Art

[0002] Blood purification equipment is a process that draws the patient's blood out of the body, removes certain metabolic wastes or toxic substances in the body through a certain procedure, and then draws the blood back into the body. It is mainly suitable for acute renal failure, acute drug or poison poisoning, chronic renal failure, renal failure before kidney transplantation, etc. The main treatment modes of blood purification are: hemodialysis (HD), hemofiltration (HF), hemodiafiltration (HDF), hemoperfusion (HP), blood exchange (PE), immunoadsorption (IA) and continuous blood purification (CRRT).

[0003] During the blood purification treatment of patients through blood purification equipment, the patient's blood needs to be drawn into the extracorporeal circulation circuit of the blood purification equipment. In order to ensure the safety of the patient's blood purification treatment, various parameters of the blood drawn into the extracorporeal circulation circuit need to be tested to prevent the blood purification equipment from malfunctioning. Among them, the detection of blood pressure is very important. Once the blood pressure in the extracorporeal circulation circuit is too high, it will cause discomfort to the patient, such as chest tightness, etc., and in severe cases, it will endanger the patient's life safety.

[0004] The existing diaphragm pressure sensor has a diaphragm in its housing (pressure joint), and the blood pressure in the pipeline is detected by the elastic deformation of the diaphragm. Therefore, the accuracy of the diaphragm directly determines the accuracy and precision of the pressure sensor in detecting the blood pressure in the pipeline. Therefore, there is an urgent need for a device that can detect the accuracy of the diaphragm to ensure the control safety of the blood purification equipment and make blood purification treatment safer and more reliable. Utility Model Content

[0005] In order to solve the above problems existing in the prior art, the purpose of the utility model is to provide a diaphragm pressure sensor detection device for blood purification equipment, which can detect the accuracy of the diaphragm, ensure the control safety of the blood purification equipment, and improve the reliability of blood purification treatment.

[0006] In order to solve the above technical problems, the technical solution adopted by the utility model is as follows: a diaphragm pressure sensor detection device for blood purification equipment, comprising:

[0007] A base, wherein a receiving cavity is provided on the top of the base;

[0008] A sensor assembly, comprising a sensor mounting seat arranged in the accommodating cavity for connecting to the sensor housing and a pressure sensor arranged in the sensor mounting seat, wherein the pressure sensor is used to detect the elastic deformation of the diaphragm in the sensor housing and convert it into an electrical signal, and when the sensor housing is mounted on the top of the sensor mounting seat, the sensing section of the pressure sensor is in contact with the diaphragm;

[0009] A pressing assembly, located above the base, for pressing the sensor housing onto the sensor mounting seat;

[0010] The control unit receives the electrical signal converted by the pressure sensor and analyzes the accuracy of the diaphragm.

[0011] As a further improvement of the present invention, the clamping assembly includes a support arm with one end fixed to the top edge of the base, a pressing force arm with one end hinged to the top of the support arm, and a clamping cover connected to the pressing force arm and located at the lower end of the pressing force arm.

[0012] As a further improvement of the utility model, the bottom of the compression cover is provided with an arc groove matched with the shape of the liquid inlet pipe and the liquid outlet pipe on the sensor housing.

[0013] As a further improvement of the utility model, a through hole for engaging with the top structure of the sensor housing is provided at the bottom of the compression cover.

[0014] As a further improvement of the utility model, the compression cover is in the shape of a truncated cone with a diameter gradually increasing from top to bottom.

[0015] As a further improvement of the utility model, a connecting hole is provided on the top of the pressing force arm, a connecting seat is connected to the top of the pressing cover, a connecting shaft is horizontally passed through the connecting seat, and the connecting shaft is fixed on the inner wall of the connecting hole.

[0016] As a further improvement of the utility model, a downwardly recessed portion is relatively arranged on the top edge of the sensor mounting seat, and the recessed portion is adapted to the shape of the liquid inlet pipe and the liquid outlet pipe of the sensor housing.

[0017] As a further improvement of the utility model, it also includes a locking assembly movably connected to the outer wall of the base, and when the pressing cover presses the sensor housing, the locking assembly is used to fix the position of the pressing force arm.

[0018] As a further improvement of the utility model, the locking assembly includes a first clamping block and a second clamping block which are integrally formed and vertically connected, the middle part of the first clamping block is movably connected to the base, a first limiting hole is provided at the lower end of the first clamping block and at one end surface close to the base, a limiting spring is provided in the first limiting hole, one end of the limiting spring is connected to the inner wall of the first limiting hole, and the other end is connected to the inner wall of the second limiting hole provided in the base;

[0019] Wherein, when the limit spring is in a compressed state, the bottom of the first pressing block abuts against the top of the pressing arm, and when the limit spring is in a deformed state, the bottom end of the first pressing block is separated from the top end of the pressing arm.

[0020] As a further improvement of the utility model, a through hole penetrating front to back is provided in the middle of the first clamping block, a connecting block is provided on the outer wall of the base, a fixed shaft is transversely passed through the connecting block, and both ends of the fixed shaft are rotatably connected to the inner walls at the left and right ends of the through hole.

[0021] Compared with the prior art, the utility model has the following beneficial effects:

[0022] The utility model discloses a diaphragm pressure sensor detection device for blood purification equipment, which provides a direct and accurate diaphragm precision detection means, can timely discover and eliminate potential sensor failures, and improves the safety and effectiveness of blood purification treatment. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the installation of the diaphragm pressure sensor detection device and the sensor housing A used in the blood purification equipment of the utility model;

[0024] Figure 2 This is a schematic diagram of opening the compression assembly in the utility model;

[0025] Figure 3 This is an open side view of the clamping assembly in the utility model;

[0026] Figure 4 This is a schematic diagram of the structure of the compression cover in the utility model;

[0027] Figure 5 This is a schematic diagram of the locking assembly structure in the utility model;

[0028] Figure 6 This is a schematic diagram of the connection between the diaphragm and the sensor housing detected by the utility model.

[0029] Attached photos

[0030] 100, base;

[0031] 200, sensor assembly; 210, sensor mounting seat; 210a, recessed portion; 220, pressure sensor;

[0032] 300, clamping assembly; 310, support arm; 320, pressing arm; 320a, connecting hole; 330, clamping cover; 330a, arc groove; 330b, through hole; 340, connecting seat; 350, connecting shaft;

[0033] 400, locking assembly; 410, first clamping block; 410a, first limiting hole; 410b, through hole; 420, second clamping block; 430, limiting spring; 440, fixed shaft; 450, connecting block. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0035] Figures 1 to 6 It shows a schematic structural diagram of an embodiment of a diaphragm pressure sensor detection device for blood purification equipment of the utility model, the main body of which includes a base 100, a sensor assembly 200, a pressing assembly 300 and a control unit.

[0036] The base 100 is used to support the sensor assembly 200 and the pressing assembly 300 . The top of the base 100 is open, and a cylindrical accommodating cavity for accommodating the sensor assembly 200 is provided at the opening.

[0037] The sensor assembly 200 includes a sensor mounting seat 210 disposed in the accommodating cavity for connecting the sensor housing A and a pressure sensor 220 disposed in the sensor mounting seat 210. The sensor mounting seat 210 is cylindrical, and the top end protrudes outward from the upper surface of the base 100. The pressure sensor 220 is fixed in the sensor mounting seat 210 along the central axis of the sensor mounting seat 210. Preferably, in this embodiment, in order to prevent the sensor housing A located on the sensor mounting seat 210 from shifting during detection, a recessed portion 210a that is recessed downward is relatively disposed at the top edge of the sensor mounting seat 210, and the recessed portion 210a is adapted to the shape of the liquid inlet and liquid outlet of the sensor housing A. The diaphragm B is disposed in the sensor housing A. When the sensor housing A is connected to the external pipeline, the blood in the sensor housing A flows, causing the diaphragm B to undergo elastic deformation. When the sensor housing A is mounted on the top of the sensor mounting base 210, the sensing section of the pressure sensor 220 at the top is in contact with the diaphragm B. At this time, the pressure sensor 220 detects the elastic deformation of the diaphragm B in the sensor housing A and converts it into an electrical signal and transmits it to the control unit.

[0038] The clamping assembly 300 is located above the base 100 and is used to clamp the sensor housing A onto the sensor mounting seat 210. Specifically, in this embodiment, the clamping assembly 300 includes a support arm 310 with one end fixed to the top edge of the base 100, a pressing arm 320 with one end hinged to the top of the support arm 310, and a clamping cover 330 connected to the pressing arm 320 and located at the lower end of the pressing arm 320. The pressing cover 330 is in a truncated cone shape with a gradually increasing diameter from top to bottom, and a through hole 330b is provided at the bottom of the pressing cover 330 to be engaged with the top structure of the sensor housing A. When in use, the pressing arm 320 is pressed to move toward the base 100 from one end away from the support arm 310. When the through hole 330b provided at the bottom of the pressing cover 330 is engaged with the top structure of the sensor housing A, the pressing cover 330 clamps the sensor housing A.

[0039] Preferably, in this embodiment, in order to make the compression cover 330 fit more closely with the sensor housing A, an arc groove 330 a matching the shape of the liquid inlet pipe and the liquid outlet pipe on the sensor housing A is provided at the bottom of the compression cover 330 .

[0040] Preferably, in this embodiment, a connection hole 320a is provided at the top of the pressing force arm 320, a connection seat 340 is connected to the top of the pressing cover 330, a connection shaft 350 is horizontally passed through the connection seat 340, and the connection shaft 350 is fixed to the inner wall of the connection hole 320a. By setting the pressing cover 330 and the pressing force arm 320 in a hinged manner, the pressing cover 330 can be slightly flipped, which can further ensure that the pressing cover 330 and the sensor housing A are fitted and fixed.

[0041] The control unit receives the electrical signal converted by the pressure sensor 220, analyzes the accuracy of the diaphragm B, compares it with the preset accuracy, and determines whether the diaphragm meets the requirements. The accuracy of the diaphragm can be detected to ensure the control safety of the blood purification equipment and improve the reliability of blood purification treatment. The device has a simple structure and is easy to operate.

[0042] Preferably, in this embodiment, in order to ensure the stability of the clamping assembly 300, a locking assembly 400 movably connected to the outer wall of the base 100 is also included. When the clamping cover 330 presses the sensor housing A, the locking assembly 400 is used to fix the position of the pressing arm 320. Specifically, in the present embodiment, the locking assembly 400 includes a first clamping block 410 and a second clamping block 420 which are integrally formed and vertically connected. The first clamping block 410 and the second clamping block 420 are in an inverted L shape as a whole. The middle part of the first clamping block 410 is movably connected to the base 100. The middle part of the first clamping block 410 is provided with a through hole 410b which passes through the front and back. The outer wall of the base 100 is provided with a connecting block 450. A fixed shaft 440 is transversely passed through and fixed on the connecting block 450. Both ends of the fixed shaft 440 are rotatably connected to the inner walls of the left and right ends of the through hole 410b. A through hole 410b which passes through the front and back is provided in the middle position of the first clamping block 410. The inner wall of the through hole 410b is transversely connected with the fixed shaft 440. The connecting block 450 is rotatably connected with the fixing shaft 440. A first limiting hole 410a is provided at the lower end of the first pressing block 410 and at one end surface close to the base 100. A limiting spring 430 is provided in the first limiting hole 410a. One end of the limiting spring 430 is connected to the inner wall of the first limiting hole 410a, and the other end is connected to the inner wall of the second limiting hole provided in the base 100. When the limiting spring 430 is in a compressed state, the bottom of the first pressing block 410 abuts against the top of the pressing arm 320. When the limiting spring 430 is in a deformed state, the bottom end of the first pressing block 410a is separated from the top of the pressing arm 320. When in use, the second pressing block 420 is separated from or abutted against the pressing arm 320 by pressing the lower end position of the first pressing block 410.

[0043] Combination Figures 1 to 6 , a diaphragm pressure sensor detection device for blood purification equipment in this embodiment, the specific use process is as follows:

[0044] First, install the diaphragm B to be tested in the sensor housing A, and connect the external pipeline with the liquid inlet and outlet pipes of the sensor housing A, and then install the sensor housing A in the sensor mounting seat 210, and press the clamping assembly 300 so that the pressing assembly 300 applies an axial force to the sensor housing A to compress the sensor housing A. Then, a known pressure change is applied to the diaphragm B through the pressure sensor 220, and the control unit receives the electrical signal output by the pressure sensor 220. Finally, the control unit analyzes the electrical signal, determines the accuracy of the diaphragm B, and compares it with the preset accuracy to determine whether the diaphragm meets the requirements. When the test is completed, separate the clamping assembly 300 from the sensor housing A, and remove the sensor housing A from the sensor mounting seat 210.

[0045] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A diaphragm pressure sensor detection device for blood purification equipment, characterized in that: include: A base (100), wherein a receiving cavity is provided on the top of the base (100); A sensor assembly (200), comprising a sensor mounting seat (210) arranged in a receiving cavity and used for connecting to a sensor housing (A), and a pressure sensor (220) arranged in the sensor mounting seat (210), wherein the pressure sensor (220) is used for detecting elastic deformation of a diaphragm (B) in the sensor housing (A) and converting it into an electrical signal; when the sensor housing (A) is mounted on top of the sensor mounting seat (210), a sensing section of the pressure sensor (220) is in contact with the diaphragm (B); A pressing assembly (300), located above the base (100), and used to press the sensor housing (A) onto the sensor mounting seat (210); The control unit receives the electrical signal converted by the pressure sensor (220) and analyzes the accuracy of the diaphragm (B).

2. A diaphragm pressure sensor detection device for blood purification equipment according to claim 1, characterized in that: The pressing assembly (300) comprises a support arm (310) with one end fixed to the top edge of the base (100), a pressing arm (320) with one end hinged to the top of the support arm (310), and a pressing cover (330) connected to the pressing arm (320) and located at the lower end of the pressing arm (320).

3. A diaphragm pressure sensor detection device for blood purification equipment according to claim 2, characterized in that: The bottom of the compression cover (330) is provided with an arc-shaped groove (330a) matching the shapes of the liquid inlet pipe and the liquid outlet pipe on the sensor housing (A).

4. A diaphragm pressure sensor detection device for blood purification equipment according to claim 2, characterized in that: The bottom of the compression cover (330) is provided with a through hole (330b) that is snap-fitted to the top structure of the sensor housing (A).

5. A diaphragm pressure sensor detection device for blood purification equipment according to claim 2, characterized in that: The compression cover (330) is in the shape of a truncated cone with a diameter that gradually increases from top to bottom.

6. A diaphragm pressure sensor detection device for blood purification equipment according to claim 2, characterized in that: The top of the pressing force arm (320) is provided with a connection hole (320a), the top of the pressing cover (330) is connected to a connection seat (340), a connection shaft (350) is horizontally passed through the connection seat (340), and the connection shaft (350) is fixed on the inner wall of the connection hole (320a).

7. A diaphragm pressure sensor detection device for blood purification equipment according to claim 1, characterized in that: A downwardly recessed recess (210a) is disposed opposite to the top edge of the sensor mounting seat (210), and the recess (210a) is adapted in shape to the liquid inlet pipe and the liquid outlet pipe of the sensor housing (A).

8. A diaphragm pressure sensor detection device for blood purification equipment according to any one of claims 2 to 6, characterized in that: It also includes a locking assembly (400) movably connected to the outer wall of the base (100), and when the pressing cover (330) presses the sensor housing (A), the locking assembly (400) is used to fix the position of the pressing arm (320).

9. A diaphragm pressure sensor detection device for blood purification equipment according to claim 8, characterized in that: The locking assembly (400) comprises a first pressing block (410) and a second pressing block (420) which are integrally formed and vertically connected, the middle portion of the first pressing block (410) being movably connected to the base (100), a first limiting hole (410a) being provided at the lower end of the first pressing block (410) and at one end surface close to the base (100), a limiting spring (430) being provided in the first limiting hole (410a), one end of the limiting spring (430) being connected to the inner wall of the first limiting hole (410a), and the other end being connected to the inner wall of the second limiting hole provided in the base (100); When the limit spring (430) is in a compressed state, the bottom of the first clamping block (410) abuts against the top of the pressing arm (320); when the limit spring (430) is in a deformed state, the bottom end of the first clamping block (410) is separated from the top end of the pressing arm (320).

10. A diaphragm pressure sensor detection device for blood purification equipment according to claim 9, characterized in that: A through hole (410b) is provided in the middle of the first clamping block (410) and passes through the through hole (410b) from front to back. A connecting block (450) is provided on the outer wall of the base (100). A fixed shaft (440) is fixedly passed through the connecting block (450) in a transverse direction. Both ends of the fixed shaft (440) are rotatably connected to the inner walls at the left and right ends of the through hole (410b).

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