Testing device

Abstract

The present invention provides a testing device capable of testing the performance parameters of a pump to be tested. The pump to be tested includes a casing and an impeller assembly, and the impeller assembly is connected to the casing. The testing device includes a device body, a driving connection assembly, and a testing assembly. The device body includes a first tank and a second tank connected to each other. The first tank is provided with a first liquid storage cavity, and the second tank is provided with a second liquid storage cavity. The device body is further provided with a channel capable of accommodating the casing, and the first liquid storage cavity and the second liquid storage cavity are communicated through the channel. The driving connection assembly is detachably connected to the device body and is in transmission connection with the impeller assembly to pump the liquid in the second liquid storage cavity to the first liquid storage cavity in sequence through the liquid inlet and the liquid outlet of the casing. The testing assembly includes a first pressure sensor and a second pressure sensor. The first pressure sensor is arranged in the first tank and is communicated with the first liquid storage cavity, and the second pressure sensor is arranged in the second tank and is communicated with the second liquid storage cavity.

Description

Technical Field

[0001] The present invention belongs to the technical field of medical devices, and particularly relates to a testing device. Background Art

[0002] Currently, an implantable blood pump is designed to be percutaneously inserted into a patient's blood vessel, such as an artery or vein in the thigh or armpit, and can be advanced into the patient's heart to function as a left ventricular assist device or a right ventricular assist device. There are many parameters of the implantable blood pump that need to be tested, and the primary one is to test the impeller parameters. By installing the implantable blood pump into the testing device, the pressure parameters at the inlet and outlet of the implantable blood pump are obtained, and the impeller structure is optimized based on the obtained pressure parameters.

[0003] Generally, a general testing device tests the entire implantable blood pump, and uses the internal drive motor of the implantable blood pump to drive the impeller to rotate. When the test is completed, if the impeller needs to be optimized, the implantable blood pump needs to be disassembled from the entire testing device. After the impeller optimization is completed, the implantable blood pump needs to be reinstalled into the testing device. Such repeated disassembly and assembly result in low testing efficiency. Summary of the Invention

[0004] The purpose of the present application is to provide a testing device with high testing efficiency, and the present application achieves the above purpose through the following technical solutions.

[0005] The present application provides a testing device for testing the pressure parameters of a pump to be tested. The pump to be tested includes a sleeve and an impeller assembly, and the impeller assembly is adaptively connected to the sleeve. The testing device includes:

[0006] A device body, which includes a first tank body and a second tank body connected to each other. The first tank body is provided with a first liquid storage cavity, the second tank body is provided with a second liquid storage cavity, and the device body is further provided with a channel capable of accommodating the sleeve. The first liquid storage cavity and the second liquid storage cavity are communicated through the channel;

[0007] A driving connection assembly, which is detachably connected to the device body and is in transmission connection with the impeller assembly to pump the liquid in the second liquid storage cavity into the first liquid storage cavity successively through the inlet of the sleeve and the outlet of the sleeve; and

[0008] A testing assembly, which includes a first pressure sensor and a second pressure sensor. The first pressure sensor is arranged in the first tank body and is communicated with the first liquid storage cavity, and the second pressure sensor is arranged in the second tank body and is communicated with the second liquid storage cavity.

[0009] Optionally, the device body includes an inner tube disposed in the first liquid storage cavity. The inner tube is provided with an installation cavity and a through hole. The installation cavity communicates with the first liquid storage cavity through the through hole. The driving connection assembly is accommodated in the installation cavity and passes through the through hole.

[0010] Optionally, the driving connection assembly includes a motor and a shaft tube. The shaft tube passes through the through hole and can be connected to the impeller assembly. The motor is connected to the shaft tube. The output shaft of the motor extends into the interior of the shaft tube and can be connected to the rotating shaft of the impeller assembly.

[0011] Optionally, the shaft tube includes a first connection section and a second connection section. The first connection section is disposed through the through hole. The second connection section is connected to the first connection section and abuts against the inner wall of the inner tube. The first connection section is provided with an axial hole. The second connection section is provided with a threaded hole that communicates with the axial hole. The motor is threadedly connected to the shaft tube through the threaded hole. The output shaft of the motor extends into the axial hole.

[0012] Optionally, the driving connection assembly further includes a coupling. One end of the coupling is connected to the output shaft of the motor, and the other end can be connected to the rotating shaft of the impeller assembly. The coupling is made of a transparent flexible material. The first connection section is provided with an observation window that communicates with the axial hole and corresponds to the position of the coupling.

[0013] Optionally, the testing device further includes a holding member that is detachably connected to the device body and abuts against the driving connection assembly.

[0014] Optionally, the holding member includes a connecting plate and an abutting column. The connecting plate is detachably connected to the device body. The abutting column is connected to one end of the connecting plate, and a part of the abutting column extends into the installation cavity to abut against the driving connection assembly. The abutting column is provided with a wire routing groove. The connecting plate is provided with a wire routing hole that communicates with the outside. The wire routing groove communicates with the wire routing hole.

[0015] Optionally, the driving connection assembly includes an abutting surface against which the abutting column abuts. The device body includes an end face that is disposed opposite to the connecting plate. The distance between the abutting surface and the end face is less than the length of the abutting column.

[0016] Optionally, the sleeve is further provided with a mounting portion, which is arranged between the liquid inlet and the liquid outlet and can be accommodated in the channel. The device body includes a mating portion, the channel is arranged in the mating portion, and the mounting portion can be in interference fit with the mating portion. The difference between the distance from the first pressure sensor to the mating portion and the distance from the liquid inlet to the mounting portion is ±20 - 50 mm; the difference between the distance from the second pressure sensor to the mating portion and the distance from the liquid outlet to the mounting portion is ±20 - 50 mm.

[0017] Optionally, the test device further includes a return pipe and a flow meter. One end of the return pipe communicates with the first liquid storage cavity, and the other end communicates with the second liquid storage cavity. The flow meter is arranged on the return pipe and can measure the flow rate of the liquid.

[0018] Compared with the prior art, the test device provided in this application includes a device body, a driving connection component and a test component. The device body includes a first tank body and a second tank body. The first tank body is provided with a first liquid storage cavity, and the second tank body is provided with a second liquid storage cavity. By setting the first liquid storage cavity and the second liquid storage cavity, the internal environment of the human body is simulated. By setting a channel to conduct the first liquid storage cavity and the second liquid storage cavity, the channel can also accommodate the sleeve of the implantable blood pump, so that the sleeve is used as a fixed component of the test device. The driving connection component is detachably connected to the device body, and the driving connection component is in transmission connection with the impeller component to realize the driving of the impeller component and the externalization of the driving connection component. That is to say, when the driving connection component is installed on the device body, the impeller component is adaptively connected to the liquid outlet on the sleeve, thus forming a complete implantable blood pump. The driving connection component provides driving force for the impeller component, and the impeller component rotates to pump the liquid in the second liquid storage cavity into the first liquid storage cavity through the liquid inlet and the liquid outlet of the sleeve in sequence. By using the first pressure sensor in the test component to record the pressure value of the first liquid storage cavity and the second pressure sensor to record the pressure value of the second liquid storage cavity, the pressure parameters of the implantable blood pump can be quickly measured. When the impeller needs to be replaced, since the impeller component is connected to the driving connection component, only the driving connection component needs to be detached from the device body, and then the impeller component can be detached from the driving connection component, and the disassembly efficiency is high, and the corresponding parameter test efficiency is also improved accordingly. Description of the Drawings

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for use in the embodiments or exemplary technical descriptions. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0020] Figure 1Stereogram of the test device provided by the present invention.

[0021] Figure 2 It is Figure 1 Exploded view of the test device shown.

[0022] Figure 3 It is Figure 1 Longitudinal sectional view of the test device (installing the pump to be tested) shown.

[0023] Figure 4 It is Figure 1 Longitudinal sectional view of the test device shown.

[0024] Figure 5 It is Figure 1 Schematic structural view of the driving connection assembly of the test device shown extending into the first liquid storage cavity.

[0025] Figure 6 It is Figure 5 Longitudinal sectional view of

[0026] Figure 7 Schematic structural view of the impeller assembly of the test device provided by the present invention.

[0027] Figure 8 It is Figure 1 Schematic structural view of the abutting member of the test device shown.

[0028] Figure 9 It is Figure 1 Schematic structural view of the driving connection assembly of the test device shown.

[0029] Figure 10 It is Figure 1 Schematic structural view of the shaft tube of the test device shown.

[0030] Figure 11 It is Figure 1 Another schematic structural view of the shaft tube of the test device shown;

[0031] Figure 12 Schematic structural view of another embodiment of the test device of the present invention.

[0032] Among them, the reference numerals in the figures are as follows: 10, testing device; 100, device body; 110, first tank; 111, first liquid storage chamber; 120, second tank; 121, second liquid storage chamber; 130, mating part; 131, channel; 140, positioning hole; 150, inner tube; 151, tube body; 152, tube cap; 153, through hole; 154, installation cavity; 160, end face; 200, drive connection assembly; 210, motor; 220, shaft tube; 221, first connection section; 222, observation window; 223, axial hole; 224, second connection section; 225, threaded hole; 226, annular groove; 227, sealing ring; 230, coupling; 240, abutting surface; 300, sleeve; 301, liquid inlet; 302, liquid outlet; 303, installation part; 310, impeller assembly; 311, rotating wheel; 312, rotating shaft; 313, outlet pipe; 314, shaft sleeve; 315, stepped structure; 400, testing assembly; 410, first pressure sensor; 420, second pressure sensor; 500, abutting member; 510, connecting plate; 511, wire routing hole; 512, positioning post; 520, abutting post; 521, wire routing groove; 600, return pipe; 610, flow meter. Detailed implementation manners

[0033] In order to make the objectives, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present application.

[0034] It should be noted that when a component is referred to as "fixed to" or "disposed on" another component, it can be directly on the other component or indirectly on the other component. When a component is referred to as "connected to" another component, it can be directly or indirectly connected to the other component. The orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be construed as a limitation to the present application. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances. The terms "first" and "second" are only used for the purpose of convenient description, and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of technical features. The meaning of "a plurality" is two or more, unless otherwise specifically defined.

[0035] Please refer to Figures 1 to 3, embodiments of the present application provide a test device 10 for testing the performance parameters of a pump to be tested. The pump to be tested includes a casing 300 and an impeller assembly 310. The impeller assembly 310 can be connected to the casing 300 so that when the impeller assembly 310 operates, liquid is drawn from the liquid inlet 301 of the casing 300 to the liquid outlet 302 of the casing 300. Please refer to Figure 7 , the impeller assembly 310 includes a rotating wheel 311, an outlet pipe 313 and a shaft sleeve 314. The rotating wheel 311 is arranged inside the outlet pipe 313, and the outlet pipe 313 is adaptively connected to the casing 300. The pump to be tested can be an implantable blood pump.

[0036] Please refer to Figure 2 , the test device 10 includes a device body 100, a drive connection assembly 200 and a test assembly 400.

[0037] The device body 100 is a housing component. The device body 100 can be cylindrical. At the same time, the device body 100 can be an integrally formed component or can be composed of a combination of multiple parts.

[0038] The device body 100 can include a connected first tank 110 and a second tank 120. Here, "connected" should be understood in a broad sense, which can be a direct connection or an indirect connection.

[0039] A first liquid storage chamber 111 is provided inside the first tank 110, and a second liquid storage chamber 121 is provided inside the second tank 120. Both the first liquid storage chamber 111 and the second liquid storage chamber 121 are used for placing liquid, so that an implantable blood pump can perform a liquid pumping operation. The liquid is generally water, which is low-cost and easy to replace. Of course, it can also be other liquids.

[0040] For the convenience of processing and calculating the liquid volume of the first liquid storage chamber 111 and the second liquid storage chamber 121, both the first liquid storage chamber 111 and the second liquid storage chamber 121 can be cylindrical, prismatic or other shapes that are convenient for calculating volume. It can be understood that the first liquid storage chamber 111 and the second liquid storage chamber 121 can be the same.

[0041] Please refer to Figure 3 and Figure 4 , the device body 100 further includes a fitting portion 130, and the fitting portion 130 can be in interference fit with the casing 300. The device body 100 is also provided with a channel 131 capable of accommodating the casing 300. The channel 131 is provided in the fitting portion 130, and the first liquid storage chamber 111 and the second liquid storage chamber 121 are communicated through the channel 131.

[0042] The driving connection component 200 is detachably connected to the device body 100. The driving connection component 200 is in transmission connection with the impeller component 310 to pump the liquid in the second liquid storage cavity 121 into the first liquid storage cavity 111 through the liquid inlet 301 and the liquid outlet 302 of the sleeve 300 in sequence.

[0043] The driving connection component 200 is a detachable part from the device body 100. It can be a part similar to an end cap, which not only has the function of connecting to the device body 100 but also has the function of driving the impeller component 310 to rotate.

[0044] The sleeve 300 is fixed inside the channel 131, and the fixing method can be interference connection, glue connection, etc. The sleeve 300 is also provided with an installation part 303. The installation part 303 is arranged between the liquid inlet 301 and the liquid outlet 302 and can be accommodated in the channel 131. Specifically, the installation part 303 can be in interference fit with the matching part 130. The sleeve 300 can be placed in the device body 100 in a first direction, that is, the first liquid storage cavity 111 is communicated with the liquid outlet 302 of the sleeve 300, and the second liquid storage cavity 121 is communicated with the liquid inlet 301 of the sleeve 300.

[0045] It can be understood that the sleeve 300 can also be placed in the device body 100 in a second direction, where the second direction is opposite to the first direction, and the first liquid storage cavity 111 and the second liquid storage cavity 121 can be substantially the same. The first liquid storage cavity 111 can be communicated with the liquid inlet 301 of the sleeve 300, and the second liquid storage cavity 121 can be communicated with the liquid outlet 302 of the sleeve 300.

[0046] When the sleeve 300 is placed in the device body 100 in the first direction, the impeller component 310 is used to pump the liquid in the second liquid storage cavity 121 into the first liquid storage cavity 111 through the liquid inlet 301 and the liquid outlet 302 of the sleeve 300 in sequence.

[0047] The test component 400 includes a first pressure sensor 410 and a second pressure sensor 420. The first pressure sensor 410 is arranged on the first tank body 110 and is communicated with the first liquid storage cavity 111. The first pressure sensor 410 is used to measure the pressure value of the liquid in the first liquid storage cavity 111; the second pressure sensor 420 is arranged on the second tank body 120 and is communicated with the second liquid storage cavity 121. The second pressure sensor 420 is used to measure the pressure value of the liquid in the second liquid storage cavity 121.

[0048] It can be understood that since the first liquid storage cavity 111 and the second liquid storage cavity 121 are not directly communicated, the pressure value of the first liquid storage cavity 111 is different from the pressure value of the second liquid storage cavity 121.

[0049] In some embodiments, a separator may be provided in the channel 131 , and the sleeve 300 may be clamped by the separator. After the sleeve 300 is clamped, the separator may also function to separate the first liquid storage chamber 111 from the second liquid storage chamber 121 .

[0050] The test device 10 provided by the embodiment of the present invention includes a device body 100, a drive connection assembly 200 and a test assembly 400. The device body 100 includes a first tank body 110 and a second tank body 120. The first tank body 110 is provided with a first liquid storage chamber 111, and the second tank body 120 is provided with a second liquid storage chamber 121. The first liquid storage chamber 111 and the second liquid storage chamber 121 are provided to simulate the internal environment of the human body. The first liquid storage chamber 111 and the second liquid storage chamber 121 are connected by providing a channel 131. The channel 131 can also accommodate the cannula 300 of the invasive blood pump, so that the cannula 300 is used as a fixed component of the test device 10. The drive connection assembly 200 is detachably connected to the device body 100, and the drive connection assembly 200 is transmission-connected to the impeller assembly 310 to realize the driving of the impeller assembly 310 and the external placement of the drive connection assembly 200.

[0051] That is, when the driving connection assembly 200 is installed on the device body 100, the impeller assembly 310 is adapted to be connected with the liquid outlet 302 on the sleeve 300, thereby forming a complete invasive blood pump. The driving connection assembly 200 provides driving force for the impeller assembly 310, and the impeller assembly 310 rotates to draw the liquid in the second liquid storage chamber 121 into the first liquid storage chamber 111 through the liquid inlet 301 and the liquid outlet 302 of the sleeve 300 in turn, and then passes through the first sensor 400 in the test assembly 400. 10 records the pressure value of the first liquid storage chamber 111, and records the pressure value of the second liquid storage chamber 121 through the second pressure sensor 420, so that the pressure parameters of the interventional blood pump can be quickly measured. When the impeller assembly 310 needs to be replaced, since the impeller assembly 310 is connected to the drive connection assembly 200, it is only necessary to remove the drive connection assembly 200 from the device body 100, and then remove the impeller assembly 310 from the drive connection assembly 200. The disassembly efficiency is high, and the corresponding parameter testing efficiency is also improved accordingly.

[0052] See also Figure 4 and Figure 6 In one embodiment, in order to facilitate the connection between the drive connection assembly 200 and the device body 100, the device body 100 includes an inner tube 150, and the inner tube 150 is arranged in the first liquid storage chamber 111. The inner tube 150 is provided with a mounting cavity 154 and a through hole 153, and the mounting cavity 154 is used to accommodate the drive connection assembly 200. The mounting cavity 154 is connected with the first liquid storage chamber 111 through the through hole 153, and the drive connection assembly 200 is accommodated in the mounting cavity 154 and passes through the through hole 153.

[0053] By providing the through hole 153, the impeller assembly 310 disposed at the end of the drive connection assembly 200 can extend into the first liquid storage chamber 111 along the through hole 153. Furthermore, the impeller assembly 310 can be adaptively connected to the liquid inlet 301 of the inner sleeve 300 in the first liquid storage chamber 111, forming a complete interventional blood pump, and pressure parameter testing can be started under the drive of the drive connection assembly 200.

[0054] For the convenience of processing and installation, the profile of the inner tube 150 can be cylindrical. The inner tube 150 is disposed in the first liquid storage chamber 111, so that the impeller assembly 310 can be adaptively connected to the liquid outlet 302 of the sleeve 300. The inner tube 150 can be integrally formed with the device body 100, or the inner tube 150 can also be connected to the end of the device body 100 by means of welding and bonding, etc. The present invention does not make specific limitations.

[0055] Optionally, the inner tube 150 can include a tube body 151 and a tube cap 152 disposed at one end of the tube body 151. The tube body 151 can be cylindrical. An installation cavity 154 is provided inside the tube body 151, and a through hole 153 is provided on the tube cap 152. The installation cavity 154 axially penetrates the tube body 154. The tube cap 152 is disposed at one end of the tube body 151 close to the sleeve 300. The function of the tube cap 152 is to physically separate the tube body 151 and the first liquid storage chamber 111, preventing the liquid in the first liquid storage chamber 111 from entering the tube body 151 after the drive connection assembly 200 is connected to the tube body 151, resulting in liquid leakage and pressure loss, thereby ensuring the accuracy of pressure measurement.

[0056] In one embodiment, in order to enable the drive connection assembly 200 to stably provide driving force for the impeller assembly 310. The drive connection assembly 200 includes a motor 210 and a shaft tube 220. The shaft tube 220 passes through the through hole 153 and can be connected to the impeller assembly 310. The motor 210 is connected to the shaft tube 220. The output shaft of the motor 210 extends into the interior of the shaft tube 220 and can be connected to the rotating shaft of the impeller assembly 310.

[0057] For example, when the first liquid storage chamber 111 is a cylindrical cavity, the motor 210 and the shaft tube 220 are sequentially arranged along the axis direction of the first liquid storage chamber 111. Among them, the shaft tube 220 is disposed on the side close to the first liquid storage chamber 111.

[0058] The motor 210 can be a servo motor 210, which is convenient for control. Of course, the motor 210 can also be other types of motors 210, and the present invention does not make specific limitations.

[0059] The main function of the shaft tube 220 is to connect the motor 210 and the impeller assembly 310. The impeller assembly 310 and the motor 210 are respectively disposed at both ends of the shaft tube 220.

[0060] When the impeller assembly 310 is running, vibrations or wobbles are inevitable. Therefore, it is necessary to fix the impeller assembly 310 to prevent the output shaft of the motor 210 from warping due to the instability of the impeller assembly 310.

[0061] Please refer to Figure 5 , in this embodiment, the housing at the output end of the motor 210 is connected to the shaft tube 220, so that the output shaft of the motor 210 extends into the interior of the shaft tube 220 and is connected to the rotating shaft of the impeller assembly 310. The shaft tube 220 is adaptively connected to the through hole 153 and passes through the through hole 153. By fixing the shaft tube 220, the output end of the motor 210 and the impeller assembly 310 are fixed, and the shaft tube 220 can extend from the inner tube 150 into the first liquid storage cavity 111, providing a structural basis for the connection between the impeller assembly 310 and the sleeve 300. By setting the shaft tube 220, the stability of the impeller assembly 310 during operation is greatly improved, and even after long-term use, the output shaft of the motor 210 will not warp.

[0062] If the entire shaft tube 220 has the same size, it is impossible to accurately position the shaft tube 220 during installation and connection. The shaft tube 220 either extends too long into the first liquid storage cavity 111 or extends insufficiently into the first liquid storage cavity 111, which cannot ensure the normal connection between the impeller assembly 310 and the sleeve 300. In order to make the connection between the shaft tube 220 and the through hole 153 more stable.

[0063] Please refer to Figure 10 and Figure 11 , in one embodiment, the shaft tube 220 includes a first connection section 221 and a second connection section 224. The first connection section 221 passes through the through hole 153, the second connection section 224 is connected to the first connection section 221 and abuts against the inner wall of the inner tube 150. The first connection section 221 is provided with an axial hole 223, and the second connection section 224 is provided with a threaded hole 225. The threaded hole 225 communicates with the axial hole 223, and the motor 210 is threadedly connected to the shaft tube 220 through the threaded hole 225. The output shaft of the motor 210 extends into the axial hole 223.

[0064] The first connection section 221 can be fixedly connected to the second connection section 224, and the fixed connection method can be integrally formed.

[0065] The first connection section 221 can be a columnar tube. The first connection section 221 is arranged inside the through hole 153, and the external dimension of the first connection section 221 can be slightly smaller than the dimension of the through hole 153, which is convenient for the first connection section 221 to smoothly enter the through hole 153. One end of the first connection section 221 away from the second connection section 224 is used to connect the impeller assembly 310. When the axial hole 223 is provided, it is to enable the first connection section 221 to be connected to the impeller assembly 310.

[0066] The second connecting section 224 can be a cylinder, and the size of the second connecting section 224 should be larger than that of the through hole 153. Thus, when the length of the first connecting section 221 extending into the first liquid storage cavity 111 reaches the maximum, the side surface of the second connecting section 224 abuts against the tube cover 152, preventing the first connecting section 221 from continuing to extend into the first liquid storage cavity 111. The threaded hole 235 is provided to connect the second connecting section 224 to the outer shell of the motor 210. The threaded hole 235 communicates with the axial hole 223, enabling the output shaft of the motor 210 to extend into the axial hole 223 and connect with the impeller assembly 310.

[0067] In this application, by setting the length of the first connecting section 221 to control the extending length, the normal connection between the impeller assembly 310 and the sleeve 300 is ensured. Moreover, since the second connecting section 224 abuts against the tube cover 152, it has certain sealing characteristics, preventing liquid from flowing from the first liquid storage cavity 111 into the inner tube 150, and making the overall placement of the shaft tube 220 more stable.

[0068] In an embodiment, the drive connection assembly 200 further includes a coupling 230. One end of the coupling 230 is connected to the output shaft of the motor 210, and the other end of the coupling 230 can be connected to the rotating shaft of the impeller assembly 310. That is to say, the motor 210 and the impeller assembly 310 are connected through the coupling 230 to achieve a stable connection between the motor 210 and the impeller assembly 310.

[0069] In an embodiment, in order to more conveniently observe whether the connection between the output shaft of the motor 210 and the output shaft of the impeller assembly 310 is stable, the coupling 230 is made of a transparent flexible material. The first connecting section 221 is provided with an observation window 222, which communicates with the axial hole 223 and corresponds to the position of the coupling 230.

[0070] The observation window 222 can be specifically arranged on the outer wall of the first connecting section 221, and the shape of the observation window 222 can be square, which is convenient for processing and has a large visual range.

[0071] Since the coupling 230 is made of a transparent flexible material, there may be extrusion deformation after being directly sleeved on the rotating shaft. Tweezers can be used to enter the observation window 222 to clamp the impeller assembly 310 for axial adjustment, making the coupling 230 expand. After adjusting the coupling 230 through the observation window 222, sealing waterproof tape can be used for winding and sealing to prevent water ingress.

[0072] In one embodiment, to improve the sealing performance between the shaft tube 220 and the tube cap 152: an annular groove 226 is provided on one side of the second connection section 224 close to the first connection section 221. The drive connection assembly 200 further includes a sealing ring 227, which is disposed in the annular groove 226. When the second connection section 224 abuts against the tube cap 152, the sealing ring 227 enhances the sealing performance between the shaft tube 220 and the tube cap 152. Since the second connection section 224 is also subjected to the axial force of the abutting column 520, the sealing ring 227 also has a certain buffering effect, preventing the tube cap 152 from deforming and protruding into the first liquid storage cavity 111 due to the long-term axial force.

[0073] Please refer to Figure 7 , in one embodiment, to stably connect the impeller assembly 310 and the shaft tube 220: by the rotation of the impeller assembly 310, the liquid in the second liquid storage cavity 121 is pumped into the first liquid storage cavity 111.

[0074] The rotating shaft 312 of the rotating wheel 311 penetrates through the shaft sleeve 314. The shaft sleeve 314 is the installation carrier of the rotating wheel 311. The shaft sleeve 314 is connected to the outlet pipe 313, enabling the rotating wheel 311 to rotate within the outlet pipe 313. The shaft sleeve 314 is also used to connect to the first connection section 221. The shaft sleeve 314 is provided with a stepped structure 315, which is adaptively connected to the axial hole 223.

[0075] Specifically, the stepped structure 315 can be adhesively bonded to the axial hole 223 or connected with an interference fit to the axial hole 223. The rotating shaft 312 is connected to the output shaft of the motor 210 through a coupling 230.

[0076] The coupling 230 can be first connected to the rotating shaft 312 of the rotating wheel 311 and then connected to the output shaft sleeve 314 of the motor 210, or the connection sequence can be reversed.

[0077] In one embodiment, the device body 100 can be made of a transparent material, facilitating the observation of the working conditions of the impeller assembly 310 within the device body 100 and the connection conditions of the various components within the device body 100, such as the position of the developing ring on the sleeve 300.

[0078] In one embodiment, the first pressure sensor 410 is used to measure the pressure value of the liquid in the first liquid storage cavity 111, and the second pressure sensor 420 is used to measure the pressure value of the liquid in the second liquid storage cavity 121. Since the first liquid storage cavity 111 and the second liquid storage cavity 121 are not directly connected, the pressure value of the first liquid storage cavity 111 is different from the pressure value of the second liquid storage cavity 121.

[0079] In some embodiments, a separator may be provided in the channel 131 , and the sleeve 300 may be clamped by the separator. After the sleeve 300 is clamped, the separator may also function to separate the first liquid storage chamber 111 from the second liquid storage chamber 121 .

[0080] If the first pressure sensor 410 is located opposite to the liquid inlet 301 and the second pressure sensor 420 is located opposite to the liquid outlet, the liquid will produce dynamic pressure fluctuations, resulting in inaccurate pressure measurement.

[0081] In one embodiment, the difference between the spacing between the first pressure sensor 410 and the matching portion 130 and the spacing between the liquid inlet 301 and the mounting portion 303 is ±20-50mm, and the difference between the spacing between the second pressure sensor 420 and the matching portion 130 and the spacing between the liquid outlet 302 and the mounting portion 303 is ±20-50mm, that is, when the sleeve 300 is installed in the device body 200, the distance between the first pressure sensor 410 and the liquid inlet 301 is 20-50mm; the distance between the second pressure sensor 420 and the liquid outlet 302 is 20-50mm, so that the dynamic pressure fluctuation generated by the liquid can be avoided and a more accurate measurement result can be obtained.

[0082] The distance between the first pressure sensor 410 and the liquid inlet 301 ranges from 20 to 50 mm (hereinafter referred to as the first distance), and the first distance can specifically be 20 mm, 25 mm, 30 mm, 35 mm, 40 mm, 45 mm and 50 mm. The distance between the second pressure sensor 420 and the liquid outlet 302 ranges from 20 to 50 mm (hereinafter referred to as the second distance), and the second distance can specifically be 20 mm, 25 mm, 30 mm, 35 mm, 40 mm, 45 mm and 50 mm. As an example, both the first distance and the second distance are 30 mm.

[0083] See also Figure 8 and Figure 9 In one embodiment, in order to conveniently install the drive connection assembly 200 and facilitate the routing of the drive connection assembly 200, the testing device 10 also includes a supporting member 500, which is detachably connected to the device body 100 and abuts against the drive connection assembly 200.

[0084] The supporting member 500 is a cover-type part, which is arranged at the end of the device body 100. The supporting member 500 serves as a component connected to the device body 100 in the driving connection assembly 200. The supporting member 500 is detachably connected to the device body 100, which can generally be a threaded connection, and can also be a snap-on connection in some embodiments.

[0085] In one embodiment, the abutting member 500 includes a connecting plate 510 and an abutting post 520. The connecting plate 510 is detachably connected to the device body 100. The abutting post 520 is connected to one end of the connecting plate 510, and a part of the abutting post 520 extends into the installation cavity 154 to abut against the driving connection assembly 200. The abutting post 520 is provided with a wire routing groove 221, and the connecting plate 510 is provided with a wire routing hole 212 communicating with the outside. The wire routing groove 221 is communicated with the wire routing hole 212.

[0086] The connecting plate 510 can be a circular plate, which is connected to the device body 100 and has a cross-sectional shape similar to that of the device body 100. Thus, after the connecting plate 510 is connected to the device body 100, the device body 100 can be stably placed on the experimental table. The connecting plate 510 is detachably connected to the device body 100. The specific connection method is a threaded connection, and other detachable connection methods such as snap connection can also be used. The present invention does not make specific limitations.

[0087] The connecting plate 510 is provided with a wire routing hole 212 for communicating the installation cavity 154 with the outside of the device body 100. It can be understood that when the connecting plate 510 is connected to the device body 100, in order to ensure the connection sealing performance, a gasket can be provided between them.

[0088] The abutting post 520 is a columnar part with a certain length, and its length can be changed according to the needs of the preset position of the motor 210. It can be understood that the abutting post 520 extends into the installation cavity 154 to place the motor 210 in a predetermined position, and further provides a driving force for the impeller assembly 310 to make the impeller assembly 310 rotate. The abutting post 520 stably sets the motor 210 in the inner tube 150, and further enables the motor 210 to stably provide a driving force for the impeller assembly 310. The fixed end of the motor 210 (the end opposite to the output shaft) can be fixed to the abutting member 500 by a threaded connection method.

[0089] The abutting post 520 can be a semi-cylinder. The output shaft of the motor 210 coincides with the axis of the semi-cylindrical abutting post 520. The abutting post 520 is provided with a wire routing groove 221, and the wire routing groove 221 is a long strip-shaped groove body. The wire routing groove 221 is arranged in the axial direction of the abutting post 520. A part of the motor 210 is arranged at the end of the abutting post 520, and the other part of the motor 210 is suspended. The suspended part of the motor 210 faces the wire routing groove 221, which can make the cable of the motor 210 fall directly into the wire routing groove 221 without bending, extending the service life of the cable. The wire routing groove 221 is communicated with the wire routing hole 212, and the cable can be drawn to the outside of the device body 100 through the wire routing hole 212.

[0090] In this embodiment, the suspension setting of the motor 210 extends the service life of the cable of the motor 210 and facilitates the routing of the motor 210. The semi-cylindrical setting of the abutting post 520 reduces the use of materials, reduces the weight of the abutting member 500, and reduces the friction between the abutting post 520 and the inner wall of the installation cavity 154 during installation.

[0091] Furthermore, since part of the motor 210 is arranged on the abutting post 520, in the axial direction of the abutting post 520, the motor 210 is equivalent to a cantilever beam on an abutting post 520, and its force is uneven, and axial displacement may occur, making it difficult for the shaft tube 220 to maintain horizontal. Therefore, the sealing ring 227 can also share the force, making the shaft tube evenly stressed circumferentially and keeping the shaft tube 220 horizontal.

[0092] In one embodiment, the drive connection assembly 200 includes an abutting surface 240, and the abutting surface 240 is arranged at the fixed end of the motor 210, and the abutting post 520 abuts against the abutting surface 240. The device body 100 includes an end surface 160, and the end surface 160 is arranged opposite to the connecting plate 510. The distance between the abutting surface 240 and the end surface 160 is less than the length of the abutting post 520. That is to say, when the connecting plate 510 is connected to the device body 100, at least part of the abutting post 520 is not in the inner tube 150, so as to ensure that the drive connection assembly 200 completely extends into the inner tube 150, enhancing the reliability of the connection between the drive connection assembly 150 and the impeller assembly 310.

[0093] In one embodiment, in order to quickly position and connect the connecting plate 510 to the device body 100, a positioning post 512 is provided on one side of the connecting plate 510 close to the abutting post 520. It can be understood that the positioning post 512 has a certain height, and the positioning post 512 can be cylindrical, which is convenient for processing. A positioning hole 140 is provided on the device body 100, and the positioning hole 140 is similar to the outer contour of the positioning post 512. The positioning post 512 is adaptively connected to the positioning hole 140. When installing the connecting plate 510 onto the device body 100, first align the positioning post 512 with the positioning hole 140 to achieve the quick positioning and installation between the connecting plate 510 and the device body 100. It should be noted that the number of the positioning posts 512 and the positioning holes 140 is the same, and the positioning posts 512 can be arranged on the connecting plate 510 according to a specific rule or randomly.

[0094] Please refer to Figure 12, in one embodiment, the testing device 10 further includes a loop pipe 600 and a flow meter 610. One end of the loop pipe 600 communicates with the first liquid storage chamber 111, and the other end of the loop pipe 600 communicates with the second liquid storage chamber 121. The flow meter 610 is disposed in the loop pipe 600 and can measure the flow rate of the liquid. The first liquid storage chamber 111 and the second liquid storage chamber 121 can be simultaneously connected to a water tank through the loop pipe 600, enabling the testing device 10 to automatically add water and making the testing process more convenient.

[0095] In summary, the testing device 10 of the present invention has carried out an overall innovation on the traditional testing idea. The driving connection component 200 and the impeller component 310 of the pump to be tested are completely externally placed on the detachable parts of the testing device 10. By disassembling and assembling the detachable parts, the disassembly and assembly of the impeller component 310 can be realized. During the test, only the impeller component 310 needs to be tested. The hydraulic performance of the rotating wheel 311 can be tested separately before the pump to be tested is assembled. After obtaining a rotating wheel 311 that meets the specifications, it can be assembled with the motor 210 part, avoiding the situation where the impeller component 310 does not meet the conditions and then disassembling the impeller component 310 when testing the entire pump to be tested, optimizing the testing steps and reducing the testing cost.

[0096] The above are only optional embodiments of the present application and are not intended to limit the present application. For those skilled in the art, various changes and modifications can be made to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included within the scope of the claims of the present application.

Claims

1. A testing device capable of testing the performance parameters of a pump to be tested, the pump to be tested comprising a casing and an impeller assembly, the impeller assembly being connected to the casing, characterized in that, The test device includes: A device body, which includes a first tank body and a second tank body connected to each other. The first tank body is provided with a first liquid storage cavity, the second tank body is provided with a second liquid storage cavity, the device body is further provided with a channel capable of accommodating the sleeve, the first liquid storage cavity and the second liquid storage cavity are communicated through the channel, the device body further includes an inner tube, the inner tube is arranged in the first liquid storage cavity, and the inner tube is provided with an installation cavity and a through hole, and the installation cavity is communicated with the first liquid storage cavity through the through hole; A drive connection assembly, which is detachably connected to the device body and is in transmission connection with the impeller assembly to pump the liquid in the second liquid storage cavity into the first liquid storage cavity in sequence through the liquid inlet and the liquid outlet of the sleeve. The drive connection assembly is accommodated in the installation cavity and passes through the through hole; and A test assembly, which includes a first pressure sensor and a second pressure sensor. The first pressure sensor is arranged on the first tank body and is communicated with the first liquid storage cavity, and the second pressure sensor is arranged on the second tank body and is communicated with the second liquid storage cavity.

2. The testing device according to claim 1, wherein The drive connection assembly includes a motor and a shaft tube. The shaft tube passes through the through hole and can be connected to the impeller assembly. The motor is connected to the shaft tube, and the output shaft of the motor extends into the interior of the shaft tube and can be connected to the rotating shaft of the impeller assembly.

3. The testing device according to claim 2, wherein The shaft tube includes a first connection section and a second connection section. The first connection section passes through the through hole, the second connection section is connected to the first connection section and abuts against the inner wall of the inner tube. The first connection section is provided with an axial hole, the second connection section is provided with a threaded hole, the threaded hole is communicated with the axial hole, and the motor is threadedly connected to the shaft tube through the threaded hole, and the output shaft of the motor extends into the axial hole.

4. The test device according to claim 3, wherein The drive connection assembly further includes a coupling. One end of the coupling is connected to the output shaft of the motor, and the other end can be connected to the rotating shaft of the impeller assembly. The coupling is made of a transparent flexible material. The first connection section is provided with an observation window, the observation window is communicated with the axial hole and corresponds to the position of the coupling.

5. The testing device according to claim 1, characterized in that, The test device further includes a holding member, which is detachably connected to the device body and abuts against the drive connection assembly.

6. The testing device according to claim 5, characterized in that The holding member includes a connecting plate and a abutting column. The connecting plate is detachably connected to the device body. The abutting column is connected to one end of the connecting plate, and a part of the abutting column extends into the installation cavity to abut against the drive connection assembly. The abutting column is provided with a wire groove, and the connecting plate is provided with a wire hole communicated with the outside, and the wire groove is communicated with the wire hole.

7. The testing device according to claim 6, characterized in that, The drive connection assembly includes an abutting surface, and the abutting column abuts against the abutting surface. The device body includes an end face, the end face is arranged opposite to the connecting plate, and the distance between the abutting surface and the end face is less than the length of the abutting column.

8. The test device according to claim 1, wherein, The casing is further provided with a mounting portion, which is arranged between the liquid inlet and the liquid outlet and can be accommodated in the channel. The device body includes a mating portion, the channel is arranged in the mating portion, and the mounting portion can be in interference fit with the mating portion. The difference between the distance from the first pressure sensor to the mating portion and the distance from the liquid inlet to the mounting portion is ±20 - 50 mm; the difference between the distance from the second pressure sensor to the mating portion and the distance from the liquid outlet to the mounting portion is ±20 - 50 mm.

9. The test device according to any one of claims 1-8, characterized in that, The testing device further includes a return pipe and a flowmeter. One end of the return pipe is communicated with the first liquid storage cavity, and the other end is communicated with the second liquid storage cavity. The flowmeter is arranged on the return pipe and can measure the flow rate of the liquid.

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