Sealing device and detection system

Abstract

This invention relates to a sealing device and a detection system. The detection system is used to detect the sealing performance of a pump body. The detection system includes a sealing device and a detection device. The sealing device includes a housing and a sealing element. The housing has a receiving cavity, a wire passage hole communicating with the receiving cavity, and a detection hole communicating with the receiving cavity. The receiving cavity can accommodate the pump body, and the wire passage hole allows a cable connected to the pump body to pass through the receiving cavity, so that the end of the cable away from the pump body can be located outside the housing. The sealing element is disposed in the wire passage hole and can seal the gap between the wall of the wire passage hole and the cable. The detection device is sealed and connected to the detection hole, and the detection device can perform gas detection on the receiving cavity through the detection hole. This technical solution allows the cable to pass through the housing when the pump body has a cable, avoiding the influence of calibration gas adhering to the cable end on the detection results, thereby ensuring the accuracy of the detection results.

Description

Technical Field

[0001] This invention relates to the field of sealing performance testing technology, and in particular to a sealing device and testing system. Background Technology

[0002] An implantable blood pump, also known as an intracardiac or intravascular blood pump, is a device designed to be inserted percutaneously into a patient's blood vessels, such as arteries or veins in the thigh or armpit, and can even reach the heart to provide a certain blood flow and blood pressure support for patients with severe ventricular insufficiency or heart failure. Currently, most commercially available implantable blood pumps consist of a pump component and a drive component, both housed in two separate chambers: the impeller is housed within an impeller housing, and the motor is housed within a motor housing. The motor housing typically comprises multiple housings that are sealed together.

[0003] Typically, the motor housing of an implantable blood pump needs to be tested for sealing before it leaves the factory. This is to prevent blood from entering the motor after implantation, ensuring the safe operation of the pump. However, current testing equipment is not accurate enough for detecting the sealing of the motor housing, leading to significant errors. Summary of the Invention

[0004] Therefore, it is necessary to provide a sealing device and detection system that can improve the accuracy of the sealing performance detection of the blood pump motor housing.

[0005] According to one aspect of this application, a detection system is provided for detecting the sealing performance of a pump body, the detection system comprising:

[0006] A sealing device includes a housing and a sealing element. The housing has a receiving cavity, a wire passage hole communicating with the receiving cavity, and a detection hole communicating with the receiving cavity. The receiving cavity can accommodate the pump body, and the wire passage hole allows a cable connected to the pump body to pass through the receiving cavity so that the end of the cable away from the pump body can be located outside the housing. The sealing element is disposed in the wire passage hole and can seal the gap between the wall of the wire passage hole and the cable.

[0007] A detection device is provided, which is sealed to the detection hole, and the detection device is capable of detecting gas in the receiving cavity through the detection hole.

[0008] Optionally, the housing further includes a communicating cavity that communicates with the receiving cavity, and the detection hole penetrates the cavity wall of the communicating cavity and the outer surface of the housing.

[0009] Optionally, the communicating cavity is disposed adjacent to the receiving cavity, so that when the pump body is installed in the receiving cavity, the communicating cavity can be close to the sealing seam of the pump body.

[0010] Optionally, the receiving cavity has a first bottom wall and a first side wall connected to the first bottom wall, the first side wall having a first connecting end and a second connecting end spaced apart from the first connecting end; the communicating cavity has a second bottom wall and a second side wall connected to the second bottom wall, the second side wall having a third connecting end and a fourth connecting end spaced apart from the third connecting end, the third connecting end being connected to the first connecting end, and the fourth connecting end being connected to the second connecting end, wherein the detection hole is opened in the second bottom wall, and the first bottom wall is used to support the bottom surface of the pump body, so that when the pump body is installed in the receiving cavity, the first side wall is opposite to the sealing seam of the pump body.

[0011] Optionally, the housing is further provided with a relief cavity, which is connected to the receiving cavity and the wire passage hole respectively, and the sealing member is at least partially disposed in the relief cavity; the sealing member is provided with a wire passage channel, which allows the cable to pass through;

[0012] The enclosure has a first outer side and a second outer side arranged adjacent to each other. The cable passage includes a first extension section and a second extension section that are interconnected. The first extension section is arranged in parallel with the first outer side, and the second extension section is arranged in parallel with the second outer side.

[0013] Optionally, the seal has a sealing protrusion, which is disposed on the inner wall of the wire passage and surrounds the central axis of the wire passage.

[0014] Optionally, the housing includes a first main body and a second main body that are detachably connected, the first main body and the second main body together forming the receiving cavity;

[0015] The seal includes a first part and a second part connected together, the first part being disposed around the receiving cavity and sealing the first body and the second body;

[0016] The second part connects to the inner side of the first part and extends in a long strip along the circumference of the first part, and the second part also extends beyond the first part into the cable passage hole; the second part forms a cable passage for the cable to pass through.

[0017] Optionally, the cavity wall of the receiving cavity is provided with a support protrusion, which can support the pump body so that the pump body is spaced apart from the cavity wall of the receiving cavity.

[0018] Optionally, the detection device can also evacuate the receiving cavity through the detection hole.

[0019] This application also proposes a sealing device for detecting the sealing performance of a pump body, the sealing device comprising:

[0020] The housing includes a receiving cavity, a cable passage hole communicating with the receiving cavity, and a detection hole communicating with the receiving cavity. The receiving cavity can accommodate the pump body, and the cable passage hole allows a cable connected to the pump body to pass through the receiving cavity so that the end of the cable away from the pump body is outside the housing. A sealing element is disposed in the cable passage hole, and the detection hole allows a detection device to perform gas detection on the receiving cavity.

[0021] A sealing element capable of sealing the gap between the wall of the wire passage hole and the cable.

[0022] To facilitate the sealing test of the pump's motor housing, a calibration gas needs to be filled into the housing. The sealing performance of the motor housing can be tested by measuring the calibration gas from the outside. However, to avoid interference from external gases, the pump body needs to be sealed before testing. However, when the inventors used the traditional method of sealing the pump body, they found that the test results were inaccurate. After research, the inventors discovered that the inaccuracy was due to the fact that when the pump body was filled with calibration gas, the end of the cable connected to the pump body was also filled with calibration gas. During the sealing test, the calibration gas at the end of the cable would be released, affecting the accuracy of the sealing test and leading to inaccurate results. The technical solution of this application provides a sealing device with a receiving cavity, a wire passage hole communicating with the receiving cavity, and a detection hole communicating with the receiving cavity. This allows the cable connected to the pump body to pass through the receiving cavity when the pump body is installed inside the receiving cavity, and ensures that the end of the cable away from the pump body is outside the housing. Then, the gas in the receiving cavity is detected through the detection hole provided on the housing and the detection device connected to the detection hole. This avoids the calibration gas at the end of the cable affecting the sealing test results of the motor housing, and improves the accuracy of the sealing test. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only one embodiment of the present invention. For those skilled in the art, other embodiments can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the blood pump motor housing that the sealing device provided in this invention needs to seal;

[0025] Figure 2 A shaft-side view of a sealing device provided according to an embodiment of the present invention;

[0026] Figure 3 An exploded view of a sealing device provided in an embodiment of the present invention;

[0027] Figure 4 A schematic diagram showing the blood pump motor housing mounted on a first main body and a first sealing body according to an embodiment of the present invention;

[0028] Figure 5 A side view of a first sealing body mounted on a first body, according to an embodiment of the present invention;

[0029] Figure 6 A side view of a second sealing body mounted on a second body, according to an embodiment of the present invention;

[0030] Figure 7 An exploded view of the housing provided in an embodiment of the present invention;

[0031] Figure 8a An exploded view of a sealing element provided according to an embodiment of the present invention;

[0032] Figure 8b An exploded view of a sealing element provided in one embodiment of the present invention;

[0033] Figure 9 for Figure 5 Enlarged view of point A in the middle;

[0034] Figure 10 for Figure 6 Enlarged view of point B in the middle;

[0035] Figure 11 for Figure 2 Enlarged diagram of point C in the middle.

[0036] Explanation of reference numerals in the attached figures:

[0037] 10. Sealing device; 100. Housing; 101. Receiving cavity; 101a. First bottom wall; 101b. First side wall; 101c. First connecting end; 101d. Second connecting end; 102. Wire hole; 103. Relief cavity; 104. First outer surface; 105. Second outer surface; 106. Boss; 1061. Locking hole; 107. Support protrusion; 108. Communicating cavity; 108a. Second bottom wall; 108b. Second side wall; 108c. Third connecting end; 108d. Fourth connecting end; 110. First main body; 111. First receiving groove; 112. First relief groove; 113. First protrusion; 1131. First groove; 120. Second main body; 121. 122. Second receiving groove; 123. Second relief groove; 123. Second protrusion; 1231. Second groove; 130. Locking buckle; 200. Sealing element; 201. Wire passage; 2011. First extension section; 2012. Second extension section; 202. Sealing protrusion ring; 210. First sealing body; 211. First wire passage groove; 212. Sealing insert; 220. Second sealing body; 221. Second wire passage groove; 222. Sealing groove; 231. First part; 232. Second part; 300. Connector; 301. Detection hole; 400. Sealing ring; 500. Locking buckle connecting seat; 20. Motor housing; 21. Upper housing; 22. Middle housing; 23. Lower housing; 30. Cable. Detailed Implementation

[0038] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0039] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "level," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0040] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0041] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0042] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the liquid level of the first feature is higher than that of the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the liquid level of the first feature is lower than that of the second feature.

[0043] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0044] An embodiment of the present invention provides a sealing device for sealing a pump body, as well as a detection system and detection method for detecting the sealing performance of the pump body. The detection method is based on the sealing device and detection system. Specifically, before detection, a calibration gas is filled into the pump body, and then the pump body filled with the calibration gas is placed into the sealing device. The sealing device is then used to seal the pump body inside. Finally, a special measuring instrument, i.e., a detection device, is used to detect whether the calibration gas leaks into the sealing device to achieve the purpose of detecting whether the sealing performance of the pump body is intact.

[0045] The following description uses a blood pump as an example to illustrate the structure of the sealing device and the method for detecting the sealing performance of the pump body in this application. Specifically, the sealing device seals the motor housing of the blood pump, and the detection system detects the sealing performance of the blood pump motor housing. This embodiment is only used as an example and does not limit the technical scope of this application. It is understood that in other embodiments, the detection system of this application is not limited to assisting in detecting the sealing performance of the blood pump motor housing, but can also be used to detect the sealing performance of any other sealing structure. Similarly, the detection method of this application for detecting the sealing performance of the pump body is not limited to detecting the sealing performance of the blood pump motor housing, but can also be used to detect the sealing performance of any other sealing structure, and is not limited here.

[0046] Additionally, it should be noted that when the sealing device seals the pump body, it means sealing the pump body inside the sealing device, not sealing the pump body's casing itself.

[0047] like Figure 1 The diagram shows a schematic of a blood pump motor housing 20 (hereinafter referred to as the motor housing). The motor housing 20 can be assembled from at least two housings to form a sealed cavity structure, within which a drive unit (not shown) is housed. In some examples, the motor housing 20 includes a first housing 21, a second housing 22, and a third housing 23, which are fixed together by laser welding or other methods to form the sealed cavity structure. Specifically, during assembly, the drive unit is first fixed in the second housing 22, with the drive unit's cable 30 extending through a through-hole in the second housing 22. Then, the second housing 22 and the third housing 23 are welded together (the first welding).

[0048] To prevent blood from entering the motor housing 20 after the blood pump is implanted in the human body, thus ensuring the safe operation of the blood pump, the sealing performance of the motor housing 20 needs to be tested before the blood pump leaves the factory. This is done by filling the motor housing 20 with calibration gas and checking for leaks to determine if the sealing performance of the motor housing 20 is good.

[0049] In one embodiment, the calibration gas can preferably be helium because helium has a small molecular weight, strong diffusivity, and high permeability, meaning it can pass through extremely small pores. Furthermore, the content of helium in normal air environments is very small. Helium is also a non-toxic, colorless, and odorless inert gas, which means that under normal circumstances it can exist as a medium in all objects without reacting. Therefore, after the second housing 22 and the third housing 23 are welded together, they are placed in a vacuum glove box, and helium is filled into the cavity formed by the second housing 22 and the third housing 23. At this time, the helium can be adsorbed onto the surface of the drive unit to form a calibration. After filling with helium, the first housing 21 is welded (second welding), thus sealing the helium inside the motor housing 20.

[0050] However, as described in the background section, the current testing equipment is not accurate enough in detecting the sealing performance of the motor housing 20, resulting in a large error in the test results. This is because during the process of filling the motor housing 20 with helium, the end of the cable 30 (i.e., the end away from the motor housing 20) will absorb helium. As a result, when testing the sealing performance of the motor housing 20, the helium absorbed at the end of the cable 30 will affect the accuracy of the test results, leading to inaccurate test results.

[0051] Based on this, the inventors of this application, through in-depth research, have designed a sealing device, detection system, and detection method for detecting the sealing performance of a pump body. Based on this sealing device, detection system, and detection method, the sealing performance of the motor housing can be accurately obtained even when the pump body has cables. The following is in conjunction with... Figures 2 to 11 This application introduces preferred embodiments of the sealing device, detection system, and detection method provided in this application.

[0052] like Figure 2 and Figure 3 As shown, a sealing device 10 for sealing the pump body includes a housing 100 and a sealing element 200. The housing 100 is a closed structure, forming a receiving cavity 101 and a wire passage 102, the wire passage 102 penetrating the outer side of the housing 100; the sealing element 200 is disposed inside the housing 100 and has a wire passage 201 (e.g., ...). Figure 8a As shown, the receiving cavity 101 and the wire passage hole 102 of the housing 100 are interconnected through the wire passage channel 201. The motor housing 20, filled with calibration gas (helium in this embodiment), can be accommodated in the receiving cavity 101. The cable 30 extending from the motor housing 20 can pass through the wire passage channel 201 and exit the housing 100 through the wire passage hole 102, so that the end of the cable 30 away from the pump body, i.e., the end of the motor housing 20, is located outside the housing 100. The sealing element 200 can be a soft material (e.g., silicone) used to seal the gap between the cable 30 and the wall of the wire passage hole 102 to ensure that helium does not leak from the wire passage hole 102 to the outside of the housing 100 during the detection process.

[0053] Thus, by providing a sealing element 200 inside the housing 100, a wire passage channel 201 on the sealing element 200, and a wire passage hole 102 in the housing 100, most of the cable 30 and the pump body can be sealed inside the housing 100, and the end of the cable 30 can be passed out of the housing 100, avoiding the influence of helium gas attached to the end of the cable 30 on the test results, thereby ensuring the accuracy of the test results.

[0054] Furthermore, the housing 100 also includes a clearance cavity 103, which connects to the receiving cavity 101 and the wire passage hole 102. The sealing member 200 is at least partially disposed within the clearance cavity 103. In some embodiments, the sealing member 200 is entirely disposed within the clearance cavity 103 and fills the clearance cavity 103. In some embodiments, a portion of the sealing member 200 is disposed within the clearance cavity 103, filling the clearance cavity 103, while another portion of the sealing member 200 is disposed within the wire passage hole 102. It should be noted that when the sealing member 200 seals the wire passage hole 102, the sealing member 200 may extend into the wire passage hole 102, or the sealing member 200 may be located at the end of the wire passage hole 102 and seal against the surface where the wire passage hole 102 is formed, without extending into the wire passage hole 102.

[0055] In one embodiment, please continue reading Figure 2 , Figures 4 to 7 The box 100 can be cubic in shape, or it can be cylindrical or other shapes.

[0056] In some embodiments, the housing 100 includes a first body 110 and a second body 120, which are detachably connected to each other. The first body 110 and the second body 120 together form a receiving cavity 101. The receiving cavity 101 may be entirely disposed in the first body 110 and have an opening facing the second body 120, which is sealed to close the opening. Alternatively, a groove may be formed on each of the first body 110 and the second body 120, and when the first body 110 and the second body 120 are mated, the two grooves together form the receiving cavity 101. Similarly, the relief cavity 103 may be entirely formed by either the first body 110 or the second body 120. Alternatively, a portion of the relief cavity 103 may be disposed in the first body 110, and another portion in the second body 120, with both portions having a groove structure to jointly form the relief cavity 103.

[0057] In one specific embodiment, one side of the first body 110 and one side of the second body 120 are in contact with each other. The side of the first body 110 facing the second body 120 has a first receiving groove 111 and a first relief groove 112 that are interconnected. The side of the second body 120 facing the first body 110 has a second receiving groove 121 and a second relief groove 122 that are interconnected. The first receiving groove 111 and the second receiving groove 121 together form a receiving cavity 101 for receiving the motor housing 20. The first relief groove 112 and the second relief groove 122 together form a relief cavity 103. A sealing member 200 is disposed in the relief cavity 103 and surrounds the receiving cavity 101. The sealing member 200 seals the first body 110 and the second body 120.

[0058] Please refer to the reference. Figure 8a Correspondingly, in this embodiment, the sealing element 200 includes a first sealing body 210 and a second sealing body 220 arranged along the distribution direction of the first body 110 and the second body 120. The first sealing body 210 and the second sealing body 220 are fitted together. The first sealing body 210 is embedded in the first relief groove 112, and the second sealing body 220 is embedded in the second relief groove 122. The first sealing body 210 has a first wire passage groove 211, and the second sealing body 220 has a second wire passage groove 221. The first wire passage groove 211 and the second wire passage groove 221 together form a wire passage channel 201 for accommodating the cable 30.

[0059] It should be noted that the embodiments described above are only preferred embodiments, but the structure of the housing 100 is not limited to the structure described in the above embodiments. For example, a first receiving groove 111 may be provided only in the first main body 110, without providing a second receiving groove 121 in the second main body 120. Correspondingly, the sealing member 200 may only have a first sealing body 210 and without a second sealing body 220. In this case, the first receiving groove 111 forms a receiving cavity 101, and the first wire passage groove 211 forms a wire passage channel 201. Alternatively, a second receiving groove 121 may be provided only in the second main body 120, without providing a first receiving groove 111 in the first main body 110. Correspondingly, only a second sealing body 220 may be provided, without providing a first sealing body 210. In this case, the second receiving groove 121 forms a receiving cavity 101, and the second wire passage groove 221 forms a wire passage channel 201.

[0060] In other embodiments, the housing 100 can also be a one-piece structure. In this embodiment, the housing 100 is provided with a sealing opening that communicates with the receiving cavity 101, and the sealing opening is movably provided with a sealing cover. The motor housing 20 can be inserted into the receiving cavity 101 through the sealing opening, and then the sealing cover can be closed to seal the housing 100, thus achieving the purpose of sealing the housing 100. The shape of the housing 100 is not limited to a cube shape; it can be any shape, and none of the above is limited.

[0061] In some embodiments, both the first wire-passing groove 211 and the second wire-passing groove 221 are elongated, and may be similarly "L"-shaped, so that the wire-passing channel 201 is also elongated and extends from the connection side of the relief cavity 103 and the receiving cavity 101 to the wire-passing hole 102. In some embodiments, such as Figure 1 and Figure 5 As shown, the box 100 has a first outer side 104 and a second outer side 105 arranged adjacent to each other. Taking a cubic box 100 as an example, the included angle between the first outer side 104 and the second outer side 105 is 90°. Figure 8aAs shown, the cable passage 201 includes a first extension section 2011 and a second extension section 2012. The first extension section 2011 and the second extension section 2012 are distributed along the length direction of the cable passage 201 and are interconnected. The first extension section 2011 is arranged parallel to the first outer side 104, and the second extension section 2012 is arranged parallel to the second outer side 105. Therefore, the first extension section 2011 and the second extension section 2012 form an L-shaped structure, which allows the cable 30 to wrap around the housing 100 one more time before extending out of the housing 100. Compared to the cable 30 extending directly out of the housing 100, by increasing the length path of the cable passage 201, the area where the cable 30 is pressed by the first sealing body 210 and the second sealing body 220 within the cable passage 201 is increased, thereby improving the sealing performance.

[0062] It should be noted that parallelism refers to complete parallelism, or roughly parallelism.

[0063] Thus, the motor housing 20 is sealed within the receiving cavity 101 of the housing 100, and the portion of the cable 30 located inside the housing 100 is wrapped and sealed in the cable passage 201 by the sealing element 200, thereby ensuring that the motor housing 20 and the portion of the cable 30, except for the portion extending out of the housing 100, can be well sealed.

[0064] Please refer to the reference. Figure 8b In some embodiments, the seal 200 includes a first portion 231 and a second portion 232 connected together. The first portion 231 is disposed around the receiving cavity 101 and seals the first body 110 and the second body 120; the second portion 232 forms the wire passage 201. In this embodiment, the first portion 231 is similar to a ring structure. For the square housing 100, the first portion 231 has a square ring structure, thereby closely resembling the edge shape of the square housing 100 and achieving a seal between the first body 110 and the second body 120.

[0065] The second part 232 is used to form the wire passage 201. Its specific design can be based on the shape of the wire passage 201. For example, if the wire passage 201 is elongated, the second part 232 can also be designed as elongated to reduce dimensions in other directions while forming the elongated wire passage 201, thus preventing the second part 232 from becoming too large. Optionally, the second part 232 is L-shaped.

[0066] The second part 232 can be connected to the inner side of the first part 231 and extends in a long strip along the circumference of the first part 231. In this embodiment, the second part 232 is completely fitted to the inner side of the first part 231, that is, the second part 232 is fitted to the inner side of the first part 231 in its own extension direction.

[0067] Furthermore, the second portion 232 extends beyond the first portion 231 into the wire hole 102, such that most of the second portion 232 is located inside the first portion 231, and a small portion of the second portion 232 is located outside the first portion 231 and matches the wire hole 102.

[0068] Optionally, the first part 231 and the second part 232 are integrally injection molded.

[0069] Furthermore, such as Figure 9 and Figure 10 As shown, the first sealing body 210 has a sealing rib 212 extending circumferentially along the first sealing body 210. The sealing rib 212 surrounds the receiving cavity 101 to form a closed loop. Correspondingly, the second sealing body 220 has a sealing groove 222 corresponding to the sealing rib 212. When the first body 110 and the second body 120 are closed together, the sealing rib 212 is interference-fitted into the sealing groove 222. In this way, by making the sealing rib 212 and the sealing groove 222 fit tightly, the sealing performance of the box 100 is further improved.

[0070] It is understood that the number of sealing ribs 212 and sealing grooves 222 is unlimited; there can be one or more. When there are two or more sealing ribs 212, there are also two or more sealing grooves 222. Each sealing rib 212 is embedded in one sealing groove 222. When there are two or more sealing ribs 212 and sealing grooves 222, multiple seals can be formed.

[0071] For further information, please refer to [link / reference]. Figure 9 and Figure 10 The seal 200 has one or more sealing protrusions 202, which are disposed in the cable passage 201 near the wall of the cable hole 102, with each sealing protrusion 202 surrounding the central axis of the cable passage 201. Thus, by providing the sealing protrusions 202, when the cable 30 contacts the first cable groove 211 of the first sealing body 210 and the second cable groove 221 of the second sealing body 220, the cable 30 can be further compressed by the sealing protrusions 202, thereby further improving the sealing performance and preventing helium from leaking from the housing 100.

[0072] In some embodiments, the seal 200 also extends into the wire hole 102, and the portion of the seal 200 located in the wire hole 102 may also be provided with a sealing protrusion 202.

[0073] The first body 110 and the second body 120 in the housing 100 are detachably connected to facilitate the removal and removal of the discharger housing 20. The detachable connection between the first body 110 and the second body 120 can be achieved in various ways, such as, but not limited to, screw connections, snap-fit ​​connections, etc. In some embodiments, such as... Figure 2 and Figure 3 As shown, the first main body 110 has a latch 130 on its side, and correspondingly, the second main body 120 has a locking position (not shown) on its side. Thus, when the first main body 110 and the second main body 120 are closed together and the latch 130 is connected to the locking position and locked, the first sealing body 210 and the second sealing body 220 come into contact with each other and undergo elastic deformation, so that the first main body 110 and the second main body 120 form a sealed box 100. The first receiving groove 111 and the second receiving groove 121 together form the receiving cavity 101 of the box 100, and the first wire passing groove 211 and the second wire passing groove 221 together form the wire passing channel 201.

[0074] The sealing device 10 may also include a locking connector 500, which is detachably connected to the second body 120, and the locking position is located on the outer side of the locking connector 500. Alternatively, the thickness of the second body 120 can be increased, and the locking position can be directly formed on the second body 120, allowing the first body 110 and the second body 120 to lock together without the need for a locking connector. Furthermore, when other locking structures are used, the locking connector 500 may not be required. The connection between the first body 110 and the second body 120 is not limited to a locking mechanism via a latch 130; no specific method is specified.

[0075] The locking position can be a groove or a structure similar to the latch 130, with the two corresponding to each other. The latch connecting seat 500 can be a square shell structure with a cavity, and the second body 120 is at least partially located in the cavity of the latch connecting seat 500.

[0076] In addition, such as Figure 2 and Figure 11 As shown, the housing 100 also has a boss 106, which is located at the position where the housing 100 has a wire hole 102. Specifically, the outer side of the first body 110 has a first protrusion 113, and the outer side of the second body 120 has a second protrusion 123. The first protrusion 113 and the second protrusion 123 are detachably connected, thereby making the connection between the first body 110 and the second body 120 more stable. The first protrusion 113 and the second protrusion 123 together constitute the boss 106 mentioned above.

[0077] Furthermore, a first groove 1131 is formed on the side of the first protrusion 113 facing the second protrusion 123, and a second groove 1231 is formed on the side of the second protrusion 123 facing the first protrusion 113. The first groove 1131 and the second groove 1231 are interconnected to form a wire passage hole 102, into which the sealing member 200 can extend. Specifically, the sealing member 200 is partially inserted into the first groove 1131 and also partially inserted into the second groove 1231, so that the sealing member 200 extends into the wire passage hole 102 and makes sealing contact with the hole wall of the wire passage hole 102. The wire passage channel 201 then extends into the wire passage hole 102.

[0078] Thus, when the first body 110 and the second body 120 are closed together, the contact area between the first body 110 and the second body 120 is increased by providing the first protrusion 113 and the second protrusion 123, so that the first body 110 and the second body 120 can be further reinforced and locked, preventing the risk of cracking at the wire hole 102, and further securing and sealing the cable 30 in the wire passage 201.

[0079] When the first body 110 and the second body 120 are connected to each other, the first protrusion 113 and the second protrusion 123 can be symmetrical about the connection surface of the first body 110 and the second body 120.

[0080] The first protrusion 113 and the second protrusion 123 can be fixed by means of screw connection or snap-fit. In some embodiments, the first protrusion 113 and the second protrusion 123 are respectively provided with locking holes 1061 for fasteners to pass through. Multiple locking holes 1061 can be provided. For example, the first protrusion 113 and the second protrusion 123 are each provided with two locking holes 1061, which are located on two opposite sides of the wire hole 201 in the radial direction to improve the stability of the connection. The fastener can be a screw or a pin.

[0081] Furthermore, the housing 100 is also provided with a detection hole 301, which connects to the receiving cavity 101, that is, the detection hole 301 penetrates both the cavity wall of the receiving cavity 101 and the outer surface of the housing 100. A detection device (not shown in the figure) is sealed to the detection hole 301, and the detection device can perform gas detection on the receiving cavity 101 through the detection hole 301, thereby determining whether the calibration gas in the motor housing 20 has leaked into the receiving cavity 101.

[0082] Furthermore, the detection device can also evacuate the receiving cavity 101 through the detection port 301. That is, the detection device can include two parts: a detection module and a vacuuming module. The detection module is used to detect the amount of gas in the receiving cavity 101, thereby determining whether the calibration gas in the motor housing 20 has leaked into the receiving cavity 101. The vacuuming module evacuates the receiving cavity 101 before the detection module performs the detection.

[0083] Furthermore, a connector 300 is also provided on the housing 100. In some embodiments, the connector 300 is detachably connected to the housing 100. When the connector 300 is provided, a portion of the detection hole 301 is also provided on the connector 300, penetrating through the connector 300. The detection device can be inserted into the detection hole 301 of the connector 300 to detect whether helium gas inside the motor housing 20 leaks into the receiving cavity 101. By detecting whether helium gas leaks into the receiving cavity 101, the purpose of checking whether the sealing performance of the motor housing 20 is intact can be achieved. Optionally, the connector 300 and the housing 100 are fixed by threaded locking. The connector 300 can be made of stainless steel to ensure the connection strength between it and the housing 100. Furthermore, a sealing ring 400 is provided between the connector 300 and the housing 100. The connector 300 and the housing 100 are sealed to each other by the sealing ring 400 to improve the sealing performance. The sealing ring 400 can be a silicone ring, rubber ring, or other structure.

[0084] Please see Figure 5 and Figure 6 Before testing the sealing performance of the motor housing 20, a vacuum operation needs to be performed inside the sealed housing 100 to remove the air. However, during vacuuming, the motor housing 20 is prone to sticking and adhering to the cavity wall of the receiving cavity 101, making it difficult to separate. Therefore, in some embodiments, the cavity wall of the receiving cavity 101 is provided with a support protrusion 107, which can support the pump body so that the pump body is spaced apart from the cavity wall of the receiving cavity 101.

[0085] Specifically, during testing, the housing 100 needs to be inverted (i.e., the detection hole 301 of the connector 300 needs to face the ground and connect to the testing device), with the first main body 110 at the bottom and the second main body 120 at the top. The motor housing 20 is pressed onto the first main body 110 by gravity. When a vacuum is drawn, under the combined action of gravity and vacuum, the motor housing 20 is easily adsorbed onto the bottom wall of the first main body 110 (the first bottom wall 101a mentioned in the later embodiment). Therefore, a support protrusion 107 can be provided on the first main body 110. The support protrusion 107 is located on the bottom wall of the first receiving groove 111 (the side facing the second main body 120, i.e., the first bottom wall 101a). This allows the motor housing 20 to be pressed against the support protrusion 107 by gravity. The support protrusion 107 lifts the motor housing 20, and the motor housing 20 is separated from the bottom wall of the first receiving groove 111. This avoids the motor housing 20 from being too tightly attached to the bottom wall of the first receiving groove 111 during vacuuming, making it difficult to detach the motor housing 20 from the bottom wall of the first receiving groove 111 during subsequent testing.

[0086] When the connector 300 is mounted on the second body 120, the support protrusion 107 is mounted on the bottom wall of the second receiving groove 121. Alternatively, the support protrusion 107 can be mounted on the bottom walls of both the first receiving groove 111 and the second receiving groove 121. This is not a limitation.

[0087] In some embodiments, a plurality of support protrusions 107 may be provided on the same side wall of the receiving cavity 101. The plurality of support protrusions 107 are arranged in a ring to approximate the circular structure of the motor housing 20, so as to better support the motor housing 20 and form a structure surrounding the motor housing 20. Optionally, the support protrusions 107 are arc-shaped.

[0088] In addition, each cavity wall of the receiving cavity 101 can be provided with a support protrusion 107, so that the motor housing 20 is spaced apart from each cavity wall of the receiving cavity 101.

[0089] Please refer to the reference again. Figure 4Furthermore, the housing 100 also includes a connecting cavity 108, and a detection hole 301 is provided within the housing 100. Specifically, the detection hole 301 directly communicates with the connecting cavity 108, meaning it penetrates the cavity wall of the connecting cavity 108. Thus, the detection hole 301 communicates with the receiving cavity 101 through the connecting cavity 108. When a vacuum is applied to the inside of the housing 100, the detection device is connected to the detection hole 301, and the gas sequentially passes through the receiving cavity 101 and the connecting cavity 108 before being extracted through the detection hole 301. Therefore, providing the connecting cavity 108 to communicate with the receiving cavity 101 facilitates vacuum extraction. Optionally, the connecting cavity 108 is arranged adjacent to the receiving cavity 101, meaning the connecting cavity 108 is close to the pump body. Therefore, when the pump body is installed inside the receiving cavity 101, the connecting cavity 108 can be close to the sealing seam of the pump body. Therefore, when gas leaks in the pump body, such as the motor housing 20, the gas can quickly flow into the connecting cavity 108, and the detection device can quickly detect the gas in the connecting cavity 108, thus improving the detection efficiency.

[0090] Please refer to the reference again. Figure 5 In some embodiments, the receiving cavity 101 has a first bottom wall 101a and a first side wall 101b connected to the first bottom wall 101a. Specifically, the first bottom wall 101a refers to the bottom wall of the first receiving groove 111. The first side wall 101b has a first connecting end 101c and a second connecting end 101d spaced apart from the first connecting end 101c. The communicating cavity 108 has a second bottom wall 108a and a second side wall 108b connected to the second bottom wall 108a. The second side wall 108b has a third connecting end 108c and a fourth connecting end 108d spaced apart from the third connecting end 108c. The third connecting end 108c is connected to the first connecting end 101c, the fourth connecting end 108d is connected to the second connecting end 101d, and the first bottom wall 101a is connected to the second bottom wall 108a. The detection hole 301 is opened in the second bottom wall 108a, and the first bottom wall 101a is used to support the bottom surface of the pump body so that when the pump body is installed in the receiving cavity 101, the first side wall 101b is opposite to the sealing seam of the pump body.

[0091] It should be noted that the sealing seam of the pump body refers to the connection seam between the various housings of the pump body, such as a weld seam. Additionally, the sealing seam of the connecting cavity 108 near the pump body refers to the location of the sealing seam in the pump body within the receiving cavity 101, immediately adjacent to the connecting cavity 108. The first sidewall 101b being opposite to the sealing seam of the pump body means that the first sidewall 101b faces the sealing seam of the pump body, and the sealing seam extends along the length of the first sidewall 101b, i.e., the first sidewall 101b surrounds the sealing seam.

[0092] Specifically, the first housing 21, the second housing 22, and the third housing 23 of the motor housing 20 are distributed along the distribution direction of the first main body 110 and the second main body 120. That is, the sealing seam between the first housing 21 and the second housing 22, and the sealing seam between the second housing 22 and the third housing 23 are distributed in a direction perpendicular to the first bottom wall 101a, and the sealing seam extends along the first side wall 101b. When there is gas leakage in the sealing seam, the leaked gas overflows directly towards the first side wall 101b, flows along the first side wall 101b, and converges between the second side wall 108b of the connecting cavity 108, so that the detection device can perform detection through the detection hole 301 on the second bottom wall 108a of the connecting cavity 108. Therefore, when gas leakage occurs between the first housing 21 and the second housing 22, and between the second housing 22 and the third housing 23, the leaked gas can quickly reach the connecting cavity 108 and accumulate, which is beneficial for the detection device to quickly detect the connecting cavity 108 and improve the accuracy of the detection results.

[0093] In some embodiments, the communicating cavity 108 is generally circular, therefore the second sidewall 108b of the communicating cavity 108 is an arc-shaped wall, which is an unclosed annular structure, i.e., has a notch. The gap between the third connecting end 108c and the fourth connecting end 108d of the second sidewall 108b is the notch. Optionally, the arc-shaped wall is a superior arc, then the notch is similar to a narrow opening. Therefore, the communicating cavity 108 connects to the receiving cavity 101 through a narrow opening, i.e., the width of the connection position (i.e., the narrow opening) between the communicating cavity 108 and the receiving cavity 101 is less than the maximum inner diameter of the communicating cavity 108.

[0094] By making the connecting cavity 108 circular and the second sidewall 108b an arc-shaped wall, the gas in the receiving cavity 101 can flow smoothly into the connecting cavity 108. In addition, the narrow opening design between the connecting cavity 108 and the receiving cavity 101 also facilitates the flow of gas from the receiving cavity 101 into the connecting cavity 108.

[0095] Of course, in other embodiments, the connecting cavity 108 can also be other shapes, such as square, elliptical, semi-circular, etc.

[0096] In some embodiments, the communicating cavity 108 is a groove provided on the side of the first body 110 facing the second body 120, and the opening of the groove is covered by the second body 120. A detection hole 301 is provided on the first body 110 and penetrates the bottom wall of the groove and the outer side of the housing 100, respectively. Thus, the communicating cavity 108 and the receiving cavity 101 are essentially distributed laterally, where "lateral" refers to a direction perpendicular to the distribution direction of the first body 110 and the second body 120.

[0097] Optionally, the depth of the connecting cavity 108 is less than the depth of the receiving cavity 101. In some specific embodiments, the depth of the connecting cavity 108 is equal to the depth of the first receiving groove 111. Therefore, the bottom wall of the connecting cavity 108 (i.e., the second bottom wall 108a mentioned above) and the bottom wall of the first receiving groove 111 (i.e., the first bottom wall 101a mentioned above) are smoothly connected, both on the same plane. There are no steps between the bottom walls of the connecting cavity 108 and the first receiving groove 111, which facilitates the rapid flow of gas from the receiving cavity 101 into the connecting cavity 108. Furthermore, the depth of the connecting cavity 108 being less than the depth of the receiving cavity 101 further results in a smaller space in the connecting cavity 108, which is conducive to gas accumulation. Therefore, when there is a calibration gas leak, the calibration gas accumulates in the smaller space of the connecting cavity 108, where the concentration is higher, which facilitates rapid detection by the detection device and improves the accuracy of the detection results.

[0098] Of course, in other embodiments, the communicating cavity 108 may not be provided inside the housing 100, and the detection hole 301 may be directly penetrated through the cavity wall of the receiving cavity 101.

[0099] In some embodiments, the shape of the receiving cavity 101 matches the shape of the motor housing 20. The shape of the receiving cavity 101 is generally the same as that of the motor housing 20. For example, if the motor housing 20 is circular, then the receiving cavity 101 is correspondingly circular, and the two are adapted to each other. For another example, if the motor housing 20 includes a circular structure and a long strip structure, then the receiving cavity 101 correspondingly includes a circular cavity for placing the circular structure and a long strip cavity for placing the long strip structure. Therefore, while the receiving cavity 101 can accommodate the motor housing 20, it can also have a small installation gap, facilitating the installation and removal of the motor housing 20, ensuring smooth gas flow, and also avoiding the situation where the receiving cavity 101 is much larger than the motor housing 20, resulting in an excessively large volume of the housing 100.

[0100] Furthermore, this application embodiment also proposes a detection system, which includes a detection device and a sealing device. The housing 100 of the sealing device is provided with a detection hole 301, which communicates with the receiving cavity 101. The detection device is disposed outside the housing 100 and communicates with the detection hole 301. The specific structures of the detection device and the sealing device are described in the above embodiments and will not be repeated here.

[0101] The following describes the testing method used to test the sealing performance of the motor housing 20:

[0102] The first step is to connect the detection device to the detection hole 301 of the connector 300.

[0103] The second step is to place the helium-filled motor housing 20 into the receiving cavity 101 of the box 100 and seal the box 100 so that the motor housing 20, except for the end of the cable 30, is completely sealed inside the box 100. In this step, specifically, compressed air is first used to blow away the helium adsorbed on the outer surface of the motor housing 20. Then, the motor housing 20 is placed in the second receiving groove 121 of the second main body 120, and the cable 30 connected to the motor housing 20 is placed in the second wire passage groove 221. At the same time, the end of the cable 30 away from the motor housing 20 extends out of the box 100 from the wire passage hole 102. At this time, the motor housing 20 and part of the cable 30 are exposed outside the second main body 120. Then, the first main body 110 is closed on the second main body 120 and the two are locked together. At this time, the parts of the motor housing 20 and the cable 30 exposed in the second main body 120 are respectively received in the first receiving groove 111 and the first wire passage groove 211 of the first main body 110. In this way, the motor housing 20 and the cable 30, except for the end away from the motor housing 20, are sealed inside the box 100.

[0104] The third step is to use a detection device to evacuate the chamber 100 to remove the air from inside the chamber 100.

[0105] The fourth step involves using a detection device to check the helium leakage rate in the containment cavity 101 (i.e., the ratio of the helium concentration in the containment cavity 101 to the helium pre-filled into the motor housing 20). If the helium leakage rate is less than or equal to a set threshold, the sealing performance of the motor housing 20 meets the requirements. Specifically, in this step, after the detection device is started, the detection result is obtained after approximately 30 seconds. The detection result should be less than or equal to a set threshold, which is 5.0E-09. If the helium leakage rate is less than or equal to 5.0E-09, it indicates that the helium in the housing 100 is negligible, meaning that the sealing performance of the motor housing 20 is good, and the helium inside has not leaked into the containment cavity 101. If the detection result is greater than or equal to 5.0E-09, it indicates that the amount of helium in the containment cavity 101 exceeds the standard, and the sealing performance of the motor housing 20 is poor.

[0106] Finally, after the test is completed, the chamber 100 is ventilated to restore atmospheric pressure, then the chamber 100 is opened and the motor housing 20 is removed, thus ending the test.

[0107] The aforementioned sealing device 10 and detection system for detecting the pump body's sealing performance involve filling the motor housing 20 with helium before welding, allowing the helium to adhere to the motor housing 20 before welding and sealing it. The welded motor housing 20 is then placed in the sealing device 10, and the sealing device 10 is sealed by fastening the first main body 110 and the second main body 120 together. A wire passage 201 is provided on the sealing element 200 to accommodate and seal the cable 30, and a wire passage hole 102 is also provided so that the end of the cable 30 with helium adsorbed can extend out of the housing 100 through the wire passage hole 102. This not only avoids the helium adhering to the end of the cable 30 from affecting the detection results, but also ensures good sealing performance. After evacuating the housing 100 during testing, the helium level inside the housing 100 is then measured. This allows for easy determination of the pump body's sealing performance by using the sealing device 10, the testing system, and the leak detection method based on the testing system provided in this application to test the pump body, such as the motor housing 20 of the blood pump. This avoids the influence of helium attached to the end of the cable 30 on the test results, thus ensuring the accuracy of the test results. Moreover, the sealing device 10 has a simple structure, the testing method is simple, and the testing speed is fast, which greatly reduces the testing cost and improves the testing efficiency.

[0108] Finally, it should be noted that the technical features of the above embodiments can be combined arbitrarily. For the sake of brevity, not all possible combinations of the technical features in the above embodiments have been described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0109] The above embodiments illustrate only one implementation of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of the present invention should be determined by the appended claims.

Claims

1. A detection system for detecting the sealing performance of a pump body, characterized in that, The detection system includes: A sealing device includes a housing and a sealing element. The housing has a receiving cavity, a wire passage hole communicating with the receiving cavity, and a detection hole communicating with the receiving cavity. The receiving cavity can accommodate the pump body, and the wire passage hole allows a cable connected to the pump body to pass through the receiving cavity so that the end of the cable away from the pump body can be located outside the housing. The sealing element is disposed in the wire passage hole and can seal the gap between the wall of the wire passage hole and the cable. The sealing element has a wire passage channel for the cable to pass through. A detection device is sealed to the detection hole, and the detection device is capable of detecting gas in the receiving cavity through the detection hole; The housing has a first outer side and a second outer side arranged adjacent to each other. The wire passage includes a first extension section and a second extension section that are interconnected. The first extension section is arranged parallel to the first outer side, and the second extension section is arranged parallel to the second outer side. And / or, the sealing element has a sealing protrusion ring, which is disposed on the inner wall of the wire passage and surrounds the central axis of the wire passage.

2. The detection system according to claim 1, characterized in that, The housing also has a communicating cavity that communicates with the receiving cavity, and the detection hole penetrates the cavity wall of the communicating cavity and the outer surface of the housing.

3. The detection system according to claim 2, characterized in that, The connecting cavity is arranged adjacent to the receiving cavity so that when the pump body is installed in the receiving cavity, the connecting cavity can be close to the sealing seam of the pump body.

4. The detection system according to claim 2 or 3, characterized in that, The receiving cavity has a first bottom wall and a first side wall connected to the first bottom wall. The first side wall has a first connecting end and a second connecting end spaced apart from the first connecting end. The communicating cavity has a second bottom wall and a second side wall connected to the second bottom wall. The second side wall has a third connecting end and a fourth connecting end spaced apart from the third connecting end. The third connecting end is connected to the first connecting end, and the fourth connecting end is connected to the second connecting end. The detection hole is opened in the second bottom wall. The first bottom wall is used to support the bottom surface of the pump body so that when the pump body is installed in the receiving cavity, the first side wall is opposite to the sealing seam of the pump body.

5. The detection system according to claim 1, characterized in that, The housing is also provided with a relief cavity, which is connected to the receiving cavity and the wire passage hole respectively. The sealing element is at least partially disposed in the relief cavity. The wire passage has a certain length and extends from the connection side of the relief cavity and the receiving cavity to the wire passage hole.

6. The detection system according to claim 1, characterized in that, The housing includes a first main body and a second main body that are detachably connected, and the first main body and the second main body together form the receiving cavity; The seal includes a first part and a second part connected together, the first part being disposed around the receiving cavity and sealing the first body and the second body; The second part connects to the inner side of the first part and extends in a long strip along the circumference of the first part, and the second part also extends beyond the first part into the wire hole; the second part forms the wire passage.

7. The detection system according to claim 1, characterized in that, The cavity wall of the receiving cavity is provided with a support protrusion, which can support the pump body so that the pump body is spaced apart from the cavity wall of the receiving cavity.

8. The detection system according to claim 1, characterized in that, The detection device can also evacuate the containment cavity through the detection hole.

9. A sealing device for detecting the sealing performance of a pump body, characterized in that, The sealing device includes: The housing includes a receiving cavity, a cable passage hole communicating with the receiving cavity, and a detection hole communicating with the receiving cavity. The receiving cavity can accommodate the pump body, and the cable passage hole allows a cable connected to the pump body to pass through the receiving cavity so that the end of the cable away from the pump body is outside the housing. The detection hole allows a detection device to perform gas detection on the receiving cavity. A sealing element is disposed in the wire passage hole, and the sealing element can seal the gap between the wall of the wire passage hole and the cable; the sealing element is provided with a wire passage channel, and the wire passage channel can allow the cable to pass through; The housing has a first outer side and a second outer side arranged adjacent to each other. The wire passage includes a first extension section and a second extension section that are interconnected. The first extension section is arranged parallel to the first outer side, and the second extension section is arranged parallel to the second outer side. And / or, the sealing element has a sealing protrusion ring, which is disposed on the inner wall of the wire passage and surrounds the central axis of the wire passage.

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