CN117232814B - Device for testing bursting pressure of artificial heart valve - Google Patents
Device for testing bursting pressure of artificial heart valve Download PDFInfo
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- CN117232814B CN117232814B CN202311514339.9A CN202311514339A CN117232814B CN 117232814 B CN117232814 B CN 117232814B CN 202311514339 A CN202311514339 A CN 202311514339A CN 117232814 B CN117232814 B CN 117232814B
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- 238000012360 testing method Methods 0.000 title claims abstract description 106
- 210000003709 heart valve Anatomy 0.000 title claims abstract description 15
- 230000009172 bursting Effects 0.000 title claims abstract description 9
- 239000007788 liquid Substances 0.000 claims abstract description 235
- 238000007789 sealing Methods 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 10
- 230000013011 mating Effects 0.000 claims 1
- 230000000149 penetrating effect Effects 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 4
- 239000000243 solution Substances 0.000 description 69
- 238000002347 injection Methods 0.000 description 9
- 239000007924 injection Substances 0.000 description 9
- 238000010586 diagram Methods 0.000 description 5
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000009434 installation Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000017531 blood circulation Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000000338 in vitro Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 210000000056 organ Anatomy 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
The invention relates to a pressure testing device, in particular to a bursting pressure testing device of a prosthetic heart valve, which comprises a testing chamber arranged in a box body; the pressure testing device also comprises a liquid tank, the liquid tank is fixed on the top plate of the box body, an open groove is fixedly arranged on the bottom plate of the inner cavity of the liquid tank, a liquid discharge pipe is arranged on the bottom plate of the open groove, an air pipe coaxially penetrates through the liquid discharge pipe, a bag body is arranged at the top end of the air pipe extending into the open groove, and the bottom end of the air pipe extends into the testing chamber. According to the invention, by starting the liquid supply mechanism, when the solution is injected into the test chamber, the solution in the open groove can be always in an overflow state; when the condition that the reverse closing effect of the artificial valve fails occurs, the liquid level of the solution in the open groove moves downwards, the volume of the solution in the open groove is further measured, and the strength of the reverse bursting pressure can be objectively and quantitatively displayed, so that the use is convenient.
Description
Technical Field
The invention relates to a pressure testing device, in particular to a bursting pressure testing device for a prosthetic heart valve.
Background
Currently, prosthetic heart valves are prosthetic organs implantable in the heart to replace heart valves and allow unidirectional blood flow, i.e., forward flow, and reverse closure.
One type of prosthetic valve is a so-called biovalve that is made entirely or partially of biological tissue, however, biological tissue has some strength and when the reverse pressure is greater than a certain value, the valve reverse closing effect fails. The maximum reverse pressure that can cause failure of the valve is generally defined as the reverse burst pressure of the valve.
The in vitro test is an important content of the performance evaluation of the artificial heart valve, and aims to obtain the performance parameters of the valve, evaluate the quality of the valve and provide a basis for the performance optimization of the valve. Among them, the burst pressure test of the prosthetic heart valve is a test item that is critical.
The pressure testing device provided in the prior art generally directly injects solution into the closed cavity formed by surrounding the heart valve, the pressurizing process is realized along with continuous injection of the solution, when the valve is in failure in reverse closing, the valve burst pressure is tested by recording the pressure data in failure, in the mode, the pressure gauge is required to be observed at any time, the instantaneous burst pressure data is not easy to record, a certain difficulty is brought to staff, repeated testing is required, and the accuracy of the test result is affected.
Disclosure of Invention
The embodiment of the invention aims to provide a device for testing the bursting pressure of a prosthetic heart valve, which aims to solve the technical problems in the background technology.
In order to achieve the above purpose, the present invention provides the following technical solutions.
The device comprises a testing chamber arranged in a box body, wherein a clamp for installing and fixing the artificial valve is arranged at the bottom of the testing chamber and used for fixing the artificial valve at the bottom of the testing chamber;
the pressure testing device also comprises a liquid supply mechanism for continuously supplying liquid into the testing chamber;
the liquid tank is used for providing solution for the test chamber and the liquid supply mechanism;
the pressure testing device also comprises a liquid tank, the liquid tank is fixed on the top plate of the box body, an open groove is fixedly arranged on the bottom plate of the inner cavity of the liquid tank, a liquid discharge pipe is arranged on the bottom plate of the open groove, an air pipe coaxially penetrates through the liquid discharge pipe, a bag body is arranged at the top end of the air pipe extending into the open groove, and the bottom end of the air pipe extends into the testing chamber.
Further, the liquid supply mechanism comprises an upper liquid cylinder, an upper piston is arranged in the upper liquid cylinder in a lifting manner, one side of the bottom of the upper liquid cylinder is connected with the liquid tank through a first liquid inlet pipe, and a first liquid inlet one-way valve for enabling solution in the liquid tank to enter the upper liquid cylinder in a one-way manner is arranged on the first liquid inlet pipe; the liquid tank is characterized in that a first liquid outlet pipe is arranged on the other side of the bottom of the upper liquid tank, the end part of the first liquid outlet pipe extends into the liquid tank, the end part of the first liquid outlet pipe is positioned above the opening of the opening tank, a first liquid outlet one-way valve is arranged on the first liquid outlet pipe and is used for enabling solution in the upper liquid tank to be discharged through the first liquid outlet pipe in a one-way mode, and as the end part of the first liquid outlet pipe is positioned above the opening tank, the upper liquid tank moves up and down along with the upper piston in the upper liquid tank, the solution in the liquid tank can firstly enter the upper liquid tank, and the solution in the upper liquid tank is added into the opening tank, so that the solution in the opening tank is filled up and overflows into the liquid tank.
Further, the liquid supply mechanism further comprises a lower liquid cylinder, a lower piston is arranged in the lower liquid cylinder in a lifting manner, one side of the bottom of the lower liquid cylinder is connected with the liquid tank through a second liquid outlet pipe, and a second liquid outlet one-way valve for enabling the solution in the liquid tank to enter the lower liquid cylinder in a one-way manner is arranged on the second liquid outlet pipe; the utility model discloses a liquid tank, including lower hydraulic cylinder bottom opposite side, the tip of lower hydraulic cylinder bottom opposite side is provided with the second feed liquor pipe, the tip of second feed liquor pipe extends to in the test chamber, just be provided with the second feed liquor check valve on the second feed liquor pipe, the second feed liquor check valve is used for making solution in the lower hydraulic cylinder is one-way to be discharged to in the test chamber through the second feed liquor pipe, along with down the piston and reciprocate in the hydraulic cylinder down, can make the solution in the cistern enter into in the test chamber for the pressure increases in the test chamber.
Further, the liquid supply mechanism further comprises a push-pull assembly, and the push-pull assembly is used for pushing the upper piston and the lower piston to alternately reciprocate up and down.
Further, the push-pull assembly comprises a forward-reverse rotation servo motor, the forward-reverse rotation servo motor is fixedly arranged on the liquid tank, and a driving gear is arranged on an output shaft of the forward-reverse rotation servo motor; the push-pull assembly further comprises a first rack, the first rack is meshed with one side of the driving gear, and the end part of the first rack is fixedly connected with the upper piston; the push-pull assembly further comprises a second rack, the second rack is meshed with the other side of the driving gear, and the end part of the second rack is fixedly connected with the lower piston; when the forward and reverse servo motor is started to enable the driving gear to rotate, the first rack and the second rack can be made to reciprocate up and down alternately.
Further, the pressure testing device also comprises a measuring cylinder, the measuring cylinder is fixedly arranged on the box body, the bottom end of the liquid discharge pipe is positioned at the opening of the measuring cylinder, the bottom end of the liquid discharge pipe is also provided with a control valve, and when the control valve is opened, the residual solution in the opening groove is discharged into the measuring cylinder through the liquid discharge pipe; the measuring cylinder is also provided with scale marks, so that the solution collected in the measuring cylinder can be conveniently observed to obtain the volume of the solution, and the strength of the reverse burst pressure can be objectively and quantitatively displayed according to the amount of the solution.
Further, be provided with the gas vent on the roof of test chamber, be provided with the discharge valve on the gas vent, the bottom connection of liquid case is provided with annotates the liquid pipe, annotate the other end of liquid pipe with the test chamber is connected, annotate still be provided with on the liquid pipe and annotate the liquid valve, open discharge valve and annotate the liquid valve for solution in the liquid case pours into the test chamber into, in order to pack the solution in the test chamber earlier, afterwards close discharge valve and annotate the liquid valve, can reduce the work load that liquid feed mechanism carries out the liquid feed to the test chamber like this, make liquid feed mechanism just fill up the solution before the work in the test chamber, when liquid feed mechanism pours into the solution into the test chamber this moment into, can last to the pressurization in the test chamber.
Further, the clamp comprises a sealing top ring arranged at the bottom of the test chamber, and the sealing top ring is matched with the top end of the artificial valve, so that the top end of the artificial valve extends into the sealing top ring; the fixture further comprises a lifting ring, a ring cavity matched with the lifting ring is formed in the bottom of the test chamber, the lifting ring is arranged in the ring cavity in a sliding mode up and down, a supporting ring is fixedly arranged on the lifting ring through a supporting rod, and the supporting ring is used for supporting and positioning the bottom end of the artificial valve; the clamp further comprises a locking ring, an inner thread is arranged on the inner ring of the locking ring, the locking ring is matched with the bottom opening of the annular cavity, the locking ring can gradually penetrate into the annular cavity through rotation of the locking ring, so that the lifting ring is lifted up, the support supporting ring is driven to lift up the artificial valve, the top end of the artificial valve stretches into the lifting ring, stable installation can be achieved, and the sealing effect is good.
Compared with the prior art, the pressure testing device provided by the invention has the beneficial effects that:
firstly, filling a test chamber with a solution; then starting the liquid supply mechanism, and when the solution is injected into the test chamber, the solution in the open groove can be always in an overflow state; specifically, when the upper piston of the liquid supply mechanism moves upwards, the lower piston moves downwards, in the process, the lower piston moves downwards to inject the solution in the lower liquid cylinder into the test chamber, and the upper piston moves upwards to suck the solution in the liquid tank into the upper liquid cylinder;
second, when the lower piston moves up, the solution in the liquid tank is pumped into the lower liquid tank, and the solution in the upper liquid tank is added to the open tank, so that the solution in the open tank overflows from the opening; thus, the process of adding solution to the open tank does not occur simultaneously with the process of injecting solution into the test chamber; when the reverse closing action of the artificial valve fails, the liquid level of the solution in the open groove moves downwards, and at the moment, the liquid supply mechanism is closed, and the volume of the solution in the open groove is measured.
In summary, the pressure testing device provided by the invention can objectively and quantitatively display the strength of the reverse burst pressure, and is convenient to use.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following description will briefly introduce the drawings that are needed in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are only some embodiments of the present invention.
FIG. 1 is a block diagram of a prosthetic heart valve burst pressure testing device of the present invention;
FIG. 2 is a schematic diagram of a liquid supply mechanism in the pressure test device according to the present invention;
FIG. 3 is a schematic diagram of a test chamber in a pressure test apparatus according to the present invention;
FIG. 4 is an enlarged partial schematic view of FIG. 3A;
FIG. 5 is an enlarged partial schematic view at B in FIG. 3;
FIG. 6 is a schematic diagram of a metering mechanism in a pressure testing device according to the present invention;
fig. 7 is a schematic structural view of a locking ring in the pressure testing device provided by the invention;
FIG. 8 is a schematic view of a liquid supply mechanism according to the present invention at a first view angle;
fig. 9 is a schematic diagram of a liquid supply mechanism according to the present invention at a second view angle.
The reference numerals are as follows:
100. a case; 101. a measuring cylinder; 1011. scale marks;
200. a test chamber; 201. an exhaust port; 202. an exhaust valve; 203. sealing the top ring; 204. a supporting ring; 2041. a support rod; 205. a lifting ring; 206. a locking ring; 2061. an internal thread; 207. a ring cavity;
300. a prosthetic valve;
400. a liquid tank; 401. a liquid injection pipe; 402. a liquid injection valve;
500. a liquid tank; 501. an open slot; 502. a liquid discharge pipe; 503. a control valve; 600. a bladder; 601. an air pipe;
700. a liquid supply mechanism; 701. a hydraulic cylinder is arranged; 7011. an upper piston; 7012. a first rack; 7013. a first liquid inlet pipe; 7014. a first liquid inlet one-way valve; 7015. a first liquid outlet pipe; 7016. a first liquid outlet one-way valve;
702. a lower hydraulic cylinder; 7021. a lower piston; 7022. a second rack; 7023. a second liquid outlet pipe; 7024. a second liquid outlet one-way valve; 7025. a second liquid inlet pipe; 7026. a second liquid inlet one-way valve;
703. a forward and reverse rotation servo motor; 7031. and a drive gear.
Detailed Description
Specific implementations of the invention are described in detail below in connection with specific embodiments.
In a preferred embodiment of the present invention, as shown in fig. 1, a device for testing the burst pressure of a prosthetic heart valve 300 is provided, which is used to test the burst pressure of the prosthetic valve and to objectively and quantitatively display the strength of the burst pressure.
Specifically, referring to fig. 1, the pressure testing apparatus includes a testing chamber 200 disposed in a box 100, a clamp for fixing the prosthetic valve 300 is disposed at the bottom of the testing chamber 200, and the clamp fixes the prosthetic valve 300 at the bottom of the testing chamber 200, so that when the testing chamber 200 is filled with liquid, the prosthetic valve 300 is continuously pressurized during the process of continuously injecting the solution into the testing chamber 200, and finally the reverse closing action of the prosthetic valve 300 is disabled, i.e. the bursting pressure occurs.
Further, in the embodiment of the present invention, the pressure testing apparatus of the present invention further includes a liquid supply mechanism 700 for continuously supplying liquid into the testing chamber 200; also included is a liquid tank 400, the liquid tank 400 for providing a solution to the test chamber 200, the liquid supply mechanism 700.
With continued reference to fig. 1, in an embodiment of the present invention, the pressure testing apparatus further includes a liquid tank 500, where the liquid tank 500 is fixed on a top plate of the case 100, an open tank 501 is fixedly disposed on a bottom plate of an inner cavity of the liquid tank 500, a liquid drain pipe 502 is disposed on a bottom plate of the open tank 501, an air pipe 601 coaxially penetrates through the liquid drain pipe 502, a bladder 600 is disposed at a top end of the air pipe 601 extending into the open tank 501, and a bottom end of the air pipe 601 extends into the testing chamber 200, so that the liquid supply mechanism 700 continuously supplies liquid into the testing chamber 200, and when the pressure in the testing chamber 200 increases, the solution passes through the air pipe 601 and enters the bladder 600, so that the bladder 600 becomes larger, and excess obtained solution in the open tank 501 is discharged into the liquid tank 500.
It will be appreciated that when the burst pressure occurs in the prosthetic valve 300, the instantaneous pressure in the test chamber 200 becomes smaller, and the bladder 600 becomes smaller and returns to its original shape, and as the bladder 600 becomes smaller, the liquid level in the open tank 501 decreases, and the amount of the residual solution in the open tank 501 is measured, so that the magnitude of the reverse burst pressure can be objectively and quantitatively displayed according to the amount of the solution.
With continued reference to fig. 1, 2, 6, 8 and 9, in the embodiment of the present invention, the liquid supply mechanism 700 includes an upper liquid cylinder 701, an upper piston 7011 is disposed in the upper liquid cylinder 701 in a lifting manner, one side of the bottom of the upper liquid cylinder 701 is connected to the liquid tank 400 through a first liquid inlet pipe 7013, and a first liquid inlet check valve 7014 for enabling the solution in the liquid tank 400 to enter the upper liquid cylinder 701 in a unidirectional manner is disposed on the first liquid inlet pipe 7013; a first liquid outlet pipe 7015 is arranged on the other side of the bottom of the upper liquid cylinder 701, the end part of the first liquid outlet pipe 7015 extends into the liquid tank 500, and the end part of the first liquid outlet pipe 7015 is positioned above the opening of the open tank 501;
further, the first liquid outlet pipe 7015 is provided with a first liquid outlet check valve 7016, and the first liquid outlet check valve 7016 is used for enabling the solution in the upper liquid tank 701 to be discharged through the first liquid outlet pipe 7015 in a unidirectional manner, and as the end portion of the first liquid outlet pipe 7015 is located above the open tank 501, along with the up-and-down movement of the upper piston 7011 in the upper liquid tank 701, the solution in the liquid tank 400 can firstly enter the upper liquid tank 701, and the solution in the upper liquid tank 701 is added into the open tank 501, so that the solution in the open tank 501 is filled up and overflows into the liquid tank 500.
Further, in the embodiment of the present invention, the liquid supply mechanism 700 further includes a lower hydraulic cylinder 702, a lower piston 7021 is disposed in the lower hydraulic cylinder 702 in a lifting manner, one side of the bottom of the lower hydraulic cylinder 702 is connected to the liquid tank 500 through a second liquid outlet pipe 7023, and a second liquid outlet check valve 7024 for enabling the solution in the liquid tank 500 to enter the lower hydraulic cylinder 702 in a unidirectional manner is disposed on the second liquid outlet pipe 7023; the other side of the bottom of the lower hydraulic cylinder 702 is provided with a second liquid inlet pipe 7025, the end part of the second liquid inlet pipe 7025 extends into the testing chamber 200, the second liquid inlet pipe 7025 is provided with a second liquid inlet one-way valve 7026, the second liquid inlet one-way valve 7026 is used for enabling solution in the lower hydraulic cylinder 702 to be discharged into the testing chamber 200 through the second liquid inlet pipe 7025 in a one-way mode, and as the lower piston 7021 moves up and down in the lower hydraulic cylinder 702, the solution in the liquid tank 500 can enter the testing chamber 200, and the pressure in the testing chamber 200 is increased.
Further, in an embodiment of the present invention, the liquid supply mechanism 700 further includes a push-pull assembly, and the push-pull assembly is configured to push the upper piston 7011 and the lower piston 7021 to reciprocate up and down alternately.
Specifically, as shown in fig. 2, 8 and 9, in the embodiment of the present invention, the push-pull assembly includes a forward-reverse rotation servo motor 703, the forward-reverse rotation servo motor 703 is fixedly installed on the liquid tank 400, and a driving gear 7031 is disposed on an output shaft of the forward-reverse rotation servo motor 703; the push-pull assembly further comprises a first rack 7012, the first rack 7012 is meshed with one side of the driving gear 7031, and the end part of the first rack 7012 is fixedly connected with the upper piston 7011; the push-pull assembly further comprises a second rack 7022, the second rack 7022 is meshed with the driving gear 7031 at the other side, and the end part of the second rack 7022 is fixedly connected with the lower piston 7021; when the forward and reverse servo motor 703 is started to rotate the drive gear 7031, the first rack 7012 and the second rack 7022 can be alternately reciprocated up and down.
Wherein, the alternating up-and-down reciprocating motion process comprises:
the second rack 7022 moves downward as the first rack 7012 moves upward;
the second rack 7022 moves upward as the first rack 7012 moves downward.
With continued reference to fig. 1, in the embodiment of the present invention, the pressure testing device further includes a measuring cylinder 101, the measuring cylinder 101 is fixedly disposed on the box 100, the bottom end of the liquid discharge pipe 502 is located at the opening of the measuring cylinder 101, the bottom end of the liquid discharge pipe 502 is further provided with a control valve 503, and when the control valve 503 is opened, the residual solution in the open groove 501 is discharged into the measuring cylinder 101 through the liquid discharge pipe 502; the graduated cylinder 101 is further provided with graduation marks 1011, so that the solution collected in the graduated cylinder 101 can be conveniently observed to obtain the volume of the solution, and the strength of the reverse burst pressure can be objectively and quantitatively displayed according to the amount of the solution.
With continued reference to fig. 1, in the embodiment of the present invention, an air outlet 201 is provided on a top plate of the test chamber 200, an air outlet 202 is provided on the air outlet 201, a liquid injection pipe 401 is connected to the bottom of the liquid tank 400, and the other end of the liquid injection pipe 401 is connected to the test chamber 200;
the liquid injection pipe 401 is further provided with a liquid injection valve 402, the exhaust valve 202 and the liquid injection valve 402 are opened, so that the solution in the liquid tank 400 is injected into the test chamber 200, the test chamber 200 is filled with the solution first, and then the exhaust valve 202 and the liquid injection valve 402 are closed, so that the workload of supplying liquid into the test chamber 200 by the liquid supply mechanism 700 can be reduced, the test chamber 200 is filled with the solution before the liquid supply mechanism 700 works, and the pressure can be continuously increased into the test chamber 200 when the liquid supply mechanism 700 injects the solution into the test chamber 200.
With continued reference to fig. 1, 3, 4, 5 and 7, in an embodiment of the present invention, the fixture includes a sealing top ring 203 disposed at the bottom of the test chamber 200, the sealing top ring 203 being matched with the top end of the prosthetic valve 300, such that the top end of the prosthetic valve 300 extends into the sealing top ring 203;
the fixture further comprises a lifting ring 205, a ring cavity 207 matched with the lifting ring 205 is formed in the bottom of the test chamber 200, the lifting ring 205 is arranged in the ring cavity 207 in a sliding mode up and down, a supporting ring 204 is fixedly arranged on the lifting ring 205 through a supporting rod 2041 in a supporting mode, and the supporting ring 204 is used for supporting and positioning the bottom end of the artificial valve 300;
the fixture further comprises a locking ring 206, an inner thread 2061 is arranged on the inner ring of the locking ring 206, the locking ring 206 is matched with the bottom end opening of the annular cavity 207, the locking ring 206 can be gradually penetrated into the annular cavity 207 by rotating the locking ring 206 so as to jack up the lifting ring 205, and then the supporting ring 204 is driven to jack up the artificial valve 300, the top end of the artificial valve 300 extends into the lifting ring 205, stable installation can be realized, and the sealing effect is good.
As can be seen from the above description of the technical solution of the present invention, the pressure testing device of the present invention fills the testing chamber 200 with the solution; then, the liquid supply mechanism 700 is started, so that when the solution is injected into the test chamber 200, the solution in the open tank 501 can be always in an overflow state; specifically, when the upper piston 7011 of the liquid supply mechanism 700 moves upward, the lower piston 7021 moves downward, and in the process, the lower piston 7021 moves downward to inject the solution in the lower liquid cylinder 702 into the test chamber 200, and the upper piston 7011 moves upward to draw the solution in the liquid tank 400 into the upper liquid cylinder 701; when the lower piston 7021 moves upward, the solution in the liquid tank 500 is drawn into the lower liquid tank 702, and the solution in the upper liquid tank 701 is added to the open tank 501, so that the solution in the open tank 501 overflows from the opening; thus, the process of adding the solution into the open tank 501 does not occur simultaneously with the process of injecting the solution into the test chamber 200;
therefore, when the reverse closing action of the artificial valve 300 fails, the liquid level of the solution in the open tank 501 moves downward, and at this time, the solution supply mechanism 700 is closed, and the volume of the solution in the open tank 501 is measured, so that the strength of the reverse burst pressure can be objectively and quantitatively displayed, and the use is convenient.
The above embodiments are merely illustrative of a preferred embodiment, but are not limited thereto. In practicing the present invention, appropriate substitutions and/or modifications may be made according to the needs of the user.
The number of equipment and the scale of processing described herein are intended to simplify the description of the present invention. Applications, modifications and variations of the present invention will be readily apparent to those skilled in the art.
Although embodiments of the invention have been disclosed above, they are not limited to the use listed in the specification and embodiments. It can be applied to various fields suitable for the present invention. Additional modifications will readily occur to those skilled in the art. Therefore, the invention is not to be limited to the specific details and illustrations shown and described herein, without departing from the general concepts defined in the claims and their equivalents.
Claims (3)
1. The device for testing the bursting pressure of the artificial heart valve comprises a testing chamber (200) arranged in a box body (100), wherein a clamp for installing and fixing the artificial valve (300) is arranged at the bottom of the testing chamber (200), and the clamp is used for fixing the artificial valve (300) at the bottom of the testing chamber (200);
further comprising a liquid supply mechanism (700) for continuously supplying liquid into the test chamber (200);
the device also comprises a liquid tank (400), wherein the liquid tank (400) is used for providing solution to the test chamber (200) and the liquid supply mechanism (700);
the method is characterized in that:
the pressure testing device also comprises a liquid tank (500), wherein the liquid tank (500) is fixed on the top plate of the box body (100), an open groove (501) is fixedly arranged on the bottom plate of the inner cavity of the liquid tank (500), a liquid discharge pipe (502) is arranged on the bottom plate of the open groove (501), an air pipe (601) is coaxially arranged in the liquid discharge pipe (502) in a penetrating way, the top end of the air pipe (601) extending into the open groove (501) is provided with a bag body (600), and the bottom end of the air pipe (601) extends into the testing chamber (200);
the liquid supply mechanism (700) comprises an upper liquid cylinder (701), an upper piston (7011) is arranged in the upper liquid cylinder (701) in a lifting manner, one side of the bottom of the upper liquid cylinder (701) is connected with the liquid tank (400) through a first liquid inlet pipe (7013), and a first liquid inlet one-way valve (7014) for enabling a solution in the liquid tank (400) to enter the upper liquid cylinder (701) in a one-way manner is arranged on the first liquid inlet pipe (7013);
a first liquid outlet pipe (7015) is arranged on the other side of the bottom of the upper liquid cylinder (701), the end part of the first liquid outlet pipe (7015) extends into the liquid tank (500), the end part of the first liquid outlet pipe (7015) is positioned above the opening of the open groove (501), a first liquid outlet one-way valve (7016) is arranged on the first liquid outlet pipe (7015), and the first liquid outlet one-way valve (7016) is used for enabling a solution in the upper liquid cylinder (701) to be discharged through the first liquid outlet pipe (7015) in a one-way mode;
the liquid supply mechanism (700) further comprises a lower liquid cylinder (702), a lower piston (7021) is arranged in the lower liquid cylinder (702) in a lifting mode, one side of the bottom of the lower liquid cylinder (702) is connected with the liquid tank (500) through a second liquid outlet pipe (7023), and a second liquid outlet one-way valve (7024) used for enabling solution in the liquid tank (500) to enter the lower liquid cylinder (702) in a one-way mode is arranged on the second liquid outlet pipe (7023);
a second liquid inlet pipe (7025) is arranged at the other side of the bottom of the lower liquid cylinder (702), the end part of the second liquid inlet pipe (7025) extends into the test chamber (200), a second liquid inlet one-way valve (7026) is arranged on the second liquid inlet pipe (7025), and the second liquid inlet one-way valve (7026) is used for enabling the solution in the lower liquid cylinder (702) to be discharged into the test chamber (200) through the second liquid inlet pipe (7025) in a one-way mode;
the liquid supply mechanism (700) further comprises a push-pull assembly, wherein the push-pull assembly is used for pushing the upper piston (7011) and the lower piston (7021) to alternately reciprocate up and down;
the push-pull assembly comprises a forward-reverse rotation servo motor (703), the forward-reverse rotation servo motor (703) is fixedly arranged on the liquid tank (400), and a driving gear (7031) is arranged on an output shaft of the forward-reverse rotation servo motor (703);
the push-pull assembly further comprises a first rack (7012), the first rack (7012) is meshed with one side of the driving gear (7031), and the end part of the first rack (7012) is fixedly connected with the upper piston (7011);
the push-pull assembly further comprises a second rack (7022), the second rack (7022) is meshed with the other side of the driving gear (7031), and the end part of the second rack (7022) is fixedly connected with the lower piston (7021);
the pressure testing device also comprises a measuring cylinder (101), wherein the measuring cylinder (101) is fixedly arranged on the box body (100), and the bottom end of the liquid discharge pipe (502) is positioned at the opening of the measuring cylinder (101);
the bottom end of the liquid discharge pipe (502) is also provided with a control valve (503).
2. The device for testing the bursting pressure of the artificial heart valve according to claim 1, wherein an exhaust port (201) is arranged on a top plate of the testing chamber (200), and an exhaust valve (202) is arranged on the exhaust port (201);
the bottom connection of liquid case (400) is provided with annotates liquid pipe (401), annotates the other end of liquid pipe (401) with test chamber (200) are connected, annotate and still be provided with on liquid pipe (401) annotate liquid valve (402).
3. The prosthetic heart valve burst pressure testing device of claim 2, wherein the clamp comprises a sealing top ring (203) disposed at the bottom of the testing chamber (200), the sealing top ring (203) mating with the top end of the prosthetic valve (300);
the fixture further comprises a lifting ring (205), a ring cavity (207) matched with the lifting ring (205) is formed in the bottom of the test chamber (200), the lifting ring (205) is arranged in the ring cavity (207) in a sliding mode up and down, a supporting ring (204) is fixedly arranged on the lifting ring (205) through a supporting rod (2041) in a supporting mode, and the supporting ring (204) is used for supporting and positioning the bottom end of the artificial valve (300);
the clamp further comprises a locking ring (206), an inner thread (2061) is formed in the inner ring of the locking ring (206), and the locking ring (206) is matched with the bottom end opening of the ring cavity (207).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311514339.9A CN117232814B (en) | 2023-11-14 | 2023-11-14 | Device for testing bursting pressure of artificial heart valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311514339.9A CN117232814B (en) | 2023-11-14 | 2023-11-14 | Device for testing bursting pressure of artificial heart valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN117232814A CN117232814A (en) | 2023-12-15 |
| CN117232814B true CN117232814B (en) | 2024-01-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311514339.9A Active CN117232814B (en) | 2023-11-14 | 2023-11-14 | Device for testing bursting pressure of artificial heart valve |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| US20030066338A1 (en) * | 2001-10-09 | 2003-04-10 | Michalsky Douglas L. | Apparatus for testing prosthetic heart valves, and methods of using same |
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| CN111189693A (en) * | 2018-11-14 | 2020-05-22 | 上海心瓣测试设备有限公司 | Valve fatigue life testing device |
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