Split type pump device

Abstract

The utility model provides a split type pump device. The split type pump device comprises a pump head, a pump machine, a locking assembly and an in-place detection sensor. The pump head is detachably connected with the pump machine; the locking assembly comprises a first part arranged on the pump head and a second part arranged on the pump machine, the locking assembly is configured to rotate in the circumferential direction along with the pump head after the pump head is installed in the pump machine in the axial direction, the first part is matched with the second part, and the first part is matched with the second part. The pump head is arranged on the pump body so as to lock the axial and circumferential positions of the pump head relative to the pump machine; the in-place detection sensor is arranged on the pump machine and is used for acquiring in-place information of the pump head; the pump machine is configured to be forbidden to be started or stopped when the in-place information is that the pump machine is not installed or not installed in place. By means of the configuration, double-insurance verification of the assembly reliability can be achieved, and the assembly reliability and safety of the split type pump device are effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of medical equipment, in particular to a split pump device. Background Art

[0002] In the medical field, safety and cost considerations often necessitate the use of disposable consumables in conjunction with reusable equipment. For this reason, some medical pump devices are configured as two components: a disposable pump head and a reusable pump mechanism. Prior to use, the pump head must be assembled with the pump mechanism, and after use or when the pump head is replaced, the pump head must be easily detached from the pump mechanism.

[0003] For medical pump devices, the proper and reliable assembly of the pump head and pump unit significantly impacts the medical procedure. Improper assembly or separation of the pump head from the pump unit while the pump unit is still operating can compromise surgical safety. However, existing medical pump devices often only have mechanical locking mechanisms, which require manual installation and repeated verification by the operator. Furthermore, these mechanical locking mechanisms make it difficult to monitor the assembly of the medical pump device during surgery. If the pump head becomes separated from the pump unit due to accidental contact or malfunction, it is difficult to detect and address the problem promptly. Utility Model Content

[0004] The purpose of the utility model is to provide a split pump device to solve the problem of low reliability of the existing pump device which only adopts a mechanical locking structure.

[0005] In order to solve the above technical problems, the utility model provides a split pump device, which includes: a pump head, a pump machine, a locking assembly and an in-position detection sensor;

[0006] The pump head is detachably connected to the pump machine; the locking assembly includes a first portion provided on the pump head and a second portion provided on the pump machine, and the locking assembly is configured such that, after the pump head is axially installed in the pump machine, the first portion cooperates with the second portion as the pump head rotates circumferentially to lock the position of the pump head relative to the pump machine in the axial and circumferential directions;

[0007] The in-situ detection sensor is provided on the pump machine for obtaining in-situ information of the pump head; the pump machine is configured to prohibit starting or shutting down when the in-situ information indicates that the pump head is not installed or is not installed in place.

[0008] Optionally, the first part includes a locking head arranged radially along the pump head; the second part includes a trigger and a rotating shaft, the trigger has a locking tongue, the trigger is rotatably provided on the pump machine around the rotating shaft, and the trigger is configured to achieve engagement and separation of the locking tongue and the locking head by rotating around the rotating shaft; when the locking tongue engages with the locking head, the circumferential position of the pump head relative to the pump machine is locked.

[0009] Optionally, the second portion includes a first potential energy portion, and the first potential energy portion is used to apply a potential force toward a locking direction to the trigger.

[0010] Optionally, the lock head and the lock tongue are configured so that when the pump rotates toward the locking position, the lock head drives the trigger to rotate in the unlocking direction by pushing the lock tongue. After the lock head passes over the lock tongue, the trigger rotates in the locking direction and the lock tongue engages with the lock head.

[0011] Optionally, the pump includes a retaining ring arranged circumferentially around the rotating shaft, and the trigger includes a bearing sleeved on the rotating shaft and a retaining platform surrounding the bearing, the retaining platform is axially matched with the retaining ring and allows circumferential relative rotation to seal the bearing and the rotating shaft.

[0012] Optionally, the trigger has an annular cavity located between the stop platform and the bearing, and the annular cavity is filled with lubricating wax.

[0013] Optionally, the first part includes a rotation limit block and a slider movably arranged along the axial direction of the pump head, and the second part includes a first retaining wall and a second retaining wall relatively arranged along the circumference of the pump machine; when the rotation limit block rotates with the pump head until it abuts against the first retaining wall, the slider moves axially to an engaging position and abuts against the second retaining wall, locking the circumferential position of the pump head relative to the pump machine.

[0014] Optionally, the first portion includes a second potential energy portion, and the second potential energy portion is used to apply a potential force toward the locking direction to the slider.

[0015] Optionally, the first part includes a first abutment surface, and the second part includes a second abutment surface; the first abutment surface and the second abutment surface are both arranged axially; when the pump rotates to the locking position, the first abutment surface abuts against the second abutment surface, locking the axial position of the pump head relative to the pump.

[0016] Optionally, the presence detection sensor includes an eddy current sensor and / or a Hall sensor.

[0017] In summary, the split pump device provided by the present invention includes: a pump head, a pump machine, a locking assembly and an in-place detection sensor; the pump head is detachably connected to the pump machine; the locking assembly includes a first part arranged on the pump head and a second part arranged on the pump machine, and the locking assembly is configured so that after the pump head is axially installed into the pump machine, the first part cooperates with the second part as the pump head rotates circumferentially to lock the position of the pump head relative to the pump machine in the axial and circumferential directions; the in-place detection sensor is provided on the pump machine for obtaining in-place information of the pump head; the pump machine is configured to prohibit starting or shutting down when the in-place information indicates that the pump head is not installed or is not installed in place.

[0018] This configuration allows the pump head to be locked to the pump unit via the locking assembly, while the in-position detection sensor provides information on the pump head's position. This information allows the pump head to be securely installed after it is installed. Combined with the locking assembly, this provides a double-safety verification of assembly reliability, effectively improving the assembly reliability and safety of the split pump unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Those skilled in the art will appreciate that the accompanying drawings are provided to better understand the present invention, but do not constitute any limitation on the scope of the present invention.

[0020] Figure 1 It is a schematic diagram of a split pump device according to an embodiment of the present invention, wherein the pump head and the pump unit are locked.

[0021] Figure 2 Schematic diagram of a split pump device according to an embodiment of the present invention, wherein the pump head is unlocked from the pump unit.

[0022] Figure 3 It is a schematic cross-sectional view of the split pump device along the axial direction of an embodiment of the utility model, wherein the pump head is installed in the pump machine.

[0023] Figure 4 It is a schematic cross-sectional view of the split pump device along the axial direction of an embodiment of the utility model, wherein the pump head is not installed in the pump machine.

[0024] Figure 5 It is a schematic axial cross-sectional view of the trigger of the embodiment of the present utility model.

[0025] Figure 6 Schematic diagram of a pump head according to another embodiment of the present invention, wherein the slider is in an engaged position.

[0026] Figure 7 Schematic diagram of a pump head according to another embodiment of the present invention, wherein the slider is in a separated position.

[0027] Figure 8 Schematic diagram of a locking ring according to another embodiment of the present invention.

[0028] Figure 9 It is a schematic diagram of a slider according to another embodiment of the present invention falling into a notch to form a locking state.

[0029] Figure 10 This is a schematic diagram of another embodiment of the present invention in which the slider is unlocked outside the notch.

[0030] Figure 11 It is a transverse cross-sectional schematic diagram of another embodiment of the present invention when the rotation limiting block, the sliding block, the first retaining wall and the second retaining wall form a locked engagement.

[0031] Figure 12 It is a schematic diagram of the guide groove of an embodiment of the utility model.

[0032] Figure 13 This is a schematic diagram of the Hall sensor and the magnet in an embodiment of the present invention being aligned.

[0033] Figure 14 This is a schematic diagram of the Hall sensor of the embodiment of the present invention when it deviates from the magnet.

[0034] In the figure: 1- pump head; 10- first housing; 100- inner cavity; 101- inflow channel; 102- outflow channel; 11- rotor; 12- guide groove; 121- guide slope; 13- convex teeth; 14- handle; 2- pump; 20- second housing; 200- recessed cavity; 21- stator; 22- retaining ring; 23- locking ring; 231- top cover; 3- locking assembly; 31- lock head; 32- trigger; 320- annular cavity; 32 1-lock tongue; 322-drive end; 323-bearing; 324-stop platform; 33-rotating shaft; 34-first potential energy part; 351-rotation limit block; 352-slider; 36-notch; 361-first stop wall; 362-second stop wall; 363-top surface; 37-second potential energy part; 381-first abutting surface; 382-second abutting surface; 4-in-position detection sensor; 41-eddy current sensor; 42-Hall sensor; 43-magnet. DETAILED DESCRIPTION

[0035] To further clarify the objectives, advantages, and features of the present invention, the present invention is further described below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the drawings are highly simplified and not drawn to scale, and are intended solely to facilitate and clearly illustrate the objectives of the embodiments of the present invention. Furthermore, the structures shown in the drawings are often portions of the actual structures. In particular, different drawings may require different emphases and may use different scales.

[0036] As used in the present invention, the singular forms "a", "an", "one" and "the" include plural objects, the term "or" is generally used to include the meaning of "and / or", the term "several" is generally used to include the meaning of "at least one", and the term "at least two" is generally used to include the meaning of "two or more". In addition, the terms "first", "second" and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features specified as "first", "second" and "third" may explicitly or implicitly include one or at least two of the features, "one end" and "the other end" as well as "proximal end" and "distal end" generally refer to two corresponding parts, which include not only endpoints. In addition, as used in the present invention, "installed", "connected", "connected", and one element is "set" on another element should be understood in a broad sense, usually only indicating that there is a connection, coupling, cooperation or transmission relationship between the two elements, and the connection, coupling, cooperation or transmission between the two elements can be direct or indirect through an intermediate element, and cannot be understood as indicating or implying the spatial position relationship between the two elements, that is, one element can be in any orientation such as inside, outside, above, below or on one side of another element, unless the content clearly indicates otherwise. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. In addition, directional terms such as above, below, up, down, upward, downward, left, right, etc. are used relative to the exemplary embodiments as they are shown in the figures, with the upward or upper direction toward the top of the corresponding figure, and the downward or lower direction toward the bottom of the corresponding figure.

[0037] The purpose of the present invention is to provide a split pump device to solve the problem of low reliability of existing pump devices that only use a mechanical locking structure.

[0038] Please refer to Figures 1 to 5 , an embodiment of the utility model provides a split pump device, which includes: a pump head 1, a pump machine 2, a locking assembly 3 and an in-position detection sensor 4; the pump head 1 is detachably connected to the pump machine 2; the locking assembly 3 includes a first part arranged on the pump head 1 and a second part arranged on the pump machine 2, and the locking assembly 3 is configured so that after the pump head 1 is axially installed into the pump machine 2, the pump head 1 rotates circumferentially, and the first part cooperates with the second part to lock the axial and circumferential position of the pump head 1 relative to the pump machine 2; the in-position detection sensor 4 is provided on the pump machine 2, for obtaining the in-position information of the pump head 1; the pump machine 2 is configured to prohibit starting or shutting down when the in-position information is not installed or not installed in place.

[0039] The split pump device of this embodiment is, for example, but not limited to, a magnetically levitated centrifugal pump, and its application scenarios include, but are not limited to, blood pumps for extracorporeal circulation assistance. In other application scenarios, the split pump device of this embodiment may also be an axial flow pump, a peristaltic pump, or other structural types. The split pump device of this embodiment may also be used in various scenarios such as infusion and aspiration of liquid medicine and body fluids, and this embodiment does not impose any restrictions on this.

[0040] Taking a magnetic levitation centrifugal pump as an example, the pump head 1 includes a first housing 10, an inlet channel 101, an outlet channel 102, and a rotor 11. The first housing 10 has an inner cavity 100. The inlet channel 101 and the outlet channel 102 are both disposed on the first housing 10 and communicate with the inner cavity 100. The rotor 11 is rotatably disposed in the inner cavity 100 about the axis of the pump head 1. The pump 2 includes a second housing 20 and a stator 21. The second housing 20 has an axially extending recessed cavity 200 for axial insertion of the pump head 1. The stator 21 is disposed at the center of the recessed cavity 200. In one embodiment, the rotor 11 includes a permanent magnet, and the stator 21 includes a coil. By energizing the coil, the rotor 11 can be suspended and rotated in the inner cavity 100. The specific structure and principle of the magnetic levitation centrifugal pump can be referred to the prior art and will not be described in detail in this embodiment.

[0041] Furthermore, the locking assembly 3 is a mechanical locking component that can lock the axial position and circumferential position of the pump head 1 relative to the pump machine 2. The radial position of the pump head 1 relative to the pump machine 2 can be limited by the cooperation between the recessed cavity 200 and the first shell 10. Thus, the pump head 1 can be locked on the pump machine 2. Optionally, when the pump head 1 is installed on the pump machine 2, the pump head 1 is first axially placed into the recessed cavity 200 of the pump machine 2, and then the pump head 1 is rotated circumferentially, and the first part and the second part of the locking assembly 3 can be matched to lock the pump head 1 and the pump machine 2. Furthermore, when the pump head 1 needs to be disassembled, the cooperation between the first part and the second part can be released, and then the pump head 1 can be taken out axially from the recessed cavity 200 by rotating the pump head 1 in the opposite direction. Optionally, in order to facilitate operation and holding, the first shell 10 of the pump head 1 has a handle 14 for the operator to hold with his fingers.

[0042] In an alternative exemplary embodiment, the first part includes a locking head 31 arranged along the radial direction of the pump head 1; the second part includes a trigger 32 and a rotating shaft 33, the trigger 32 has a locking tongue 321, the trigger 32 is rotatably provided on the pump machine 2 around the rotating shaft 33, and the trigger 32 is configured to achieve the engagement and separation of the locking tongue 321 and the locking head 31 by rotating around the rotating shaft 33; when the locking tongue 321 engages with the locking head 31, the circumferential position of the pump head 1 relative to the pump machine 2 is locked.

[0043] Please refer to Figure 1 、 Figure 2 and Figure 5 Optionally, the rotating shaft 33 is parallel to the axis of the pump head 1 and is fixedly arranged on the second housing 20 of the pump machine 2. The rotating shaft 33 is preferably offset in an area outside the outer peripheral contour of the pump head 1. The trigger 32 is rotatably arranged around the rotating shaft 33. The trigger 32 preferably extends a certain length along the circumference of the pump head 1 and has a certain length on both sides of the rotating shaft 33, one end of which is a hook-shaped locking tongue 321, and the other end is a driving end 322 for operation. It can be understood that the trigger 32 and the rotating shaft 33 form a lever-shaped mechanism with the rotating shaft 33 as the fulcrum. By operating the driving end 322, the locking tongue 321 can be tilted up (referring to movement in the axial direction away from the pump head 1) or pressed down (referring to movement in the axial direction toward the pump head 1).

[0044] The locking head 31 is a radial protrusion provided on the first housing 10, and its shape matches the hook shape of the locking tongue 321. When the locking head 31 is circumferentially aligned with the locking tongue 321 and the locking tongue 321 is pressed down, the locking head 31 and the locking tongue 321 engage and lock each other, thereby locking the pump head 1 circumferentially and preventing rotation. When the locking tongue 321 is tilted up, the locking engagement with the locking head 31 is released, and the pump head 1 can now rotate circumferentially.

[0045] Optionally, the second portion includes a first potential energy portion 34, which is used to apply a potential force toward the locking direction to the trigger 32. In combination with the foregoing, it can be understood that the lock tongue 321 is locked when it is pressed down, so the locking direction of the trigger 32 refers to the direction of the lock tongue 321 toward the axis of the pump head 1. The first potential energy portion 34 can apply a potential force toward the axis of the pump head 1 to the trigger 32, so that the lock tongue 321 and the lock head 31 can be kept engaged and locked when the trigger 32 is not subjected to external force. When unlocking is required, it is only necessary to press the driving end 322 to overcome the potential force of the first potential energy portion 34, so that the lock tongue 321 can be tilted.

[0046] Optionally, the first potential energy portion 34 includes an elastic potential energy member, such as a spring or a spring. Figure 5 In one embodiment, the trigger 32 includes a bearing 323 sleeved on the rotating shaft 33, and the first potential energy portion 34 includes a spring disposed around the outer circumference of the bearing 323. In other embodiments, the first potential energy portion 34 may also include a magnetic potential energy element, such as two magnets with the same polarity arranged opposite each other, where the magnetic repulsion between the two magnets can generate magnetic potential energy. Those skilled in the art may configure the first potential energy portion 34 according to actual circumstances.

[0047] Optionally, the lock head 31 and the lock tongue 321 are configured such that, when the pump 2 is rotated toward the locked position, the lock head 31 pushes the lock tongue 321, thereby driving the trigger 32 to rotate toward the unlocking direction. After the lock head 31 passes the lock tongue 321, the trigger 32 rotates toward the locking direction, causing the lock tongue 321 to engage with the lock head 31. In some embodiments, during installation of the pump 2, the driving end 322 need not be operated, and the pump 2's own rotation can be used to unlock the lock tongue 321. When the pump 2 is fully rotated, the lock head 31 passes the lock tongue 321, and the trigger 32 rotates toward the locking direction under the potential force of the first potential energy portion 34, causing the lock tongue 321 to automatically engage and lock with the lock head 31. It should be noted that the pump 2 is configured for automatic unlocking only during installation; the corresponding contact surfaces of the lock head 31 and the lock tongue 321 can be configured with a bevel angle to achieve a one-way unlocking effect. During the disassembly process, the driving end 322 must still be operated to unlock the device, so as to prevent the pump 2 from being unexpectedly disengaged due to accidental contact or the inertia of the rotor 11 .

[0048] Please continue to refer to Figure 5 Optionally, the pump machine 2 includes a retaining ring 22 circumferentially arranged around the rotating shaft 33, and the trigger 32 includes a bearing 323 sleeved on the rotating shaft 33 and a retaining platform 324 surrounding the outside of the bearing 323, and the retaining platform 324 is axially matched with the retaining ring 22 and allows circumferential relative rotation to seal the bearing 323 and the rotating shaft 33. The split pump device provided in this embodiment is easily contaminated by foreign matter in some application scenarios (such as surgical scenarios), such as body fluids, consumables used in surgery, drugs, etc. Once these foreign matter enters the bearing 323 and the rotating shaft 33, they will block the flexible rotation of the trigger 32, thereby causing unexpected events to occur. For example, if the trigger 32 is stuck in the tilted position, the pump head 1 will not be reliably locked and will slip.

[0049] The axial arrangement of the retaining plate 324 and the retaining ring 22 substantially encloses the bearing 323 and the rotating shaft 33, thereby reducing or preventing contamination by foreign matter. In one embodiment, the retaining ring 22 is provided on the second housing 20 (or on the locking ring 23, as described below) in a circumferentially protruding manner around the rotating shaft 33, and the retaining plate 324 is also annularly pressed onto the axial end surface of the retaining ring 22, thereby sealing the internal space. As can be appreciated, even if some liquid foreign matter is spilled onto the second housing 20, it will be difficult for it to flow over the raised retaining ring 22. Thus, the raised structure effectively blocks foreign matter.

[0050] Optionally, the trigger 32 has an annular cavity 320 located between the baffle 324 and the bearing 323, and the annular cavity 320 is filled with lubricating wax. One function of the lubricating wax is to act as a filler, which is filled in the annular cavity 320 to prevent foreign matter from passing through. Another function of the lubricating wax is to lubricate the trigger 32, the baffle ring 22, the bearing 323 and the rotating shaft 33. For example, it can reduce the circumferential sliding friction resistance between the baffle ring 22 and the baffle 324, and reduce the rotational resistance of the trigger 32. It can be seen that the trigger 32 prevents the intrusion of foreign matter by constructing and filling two lines of defense, effectively preventing blockage and stagnation, thereby further improving the assembly reliability and safety of the entire split pump device.

[0051] The locking assembly 3 is not limited to the trigger 32 locking structure shown in the above example, and the components for driving locking and unlocking in the locking assembly 3 are integrated in the second part. Figures 6 to 10 In another embodiment, the components for driving locking and unlocking in the locking assembly 3 can also be integrated into the first portion. In this way, when operating the locking and unlocking, the operator can hold and operate the pump head 1 with one hand to assemble and unlock the pump head 1.

[0052] In one exemplary embodiment, the first portion includes a rotation limiting block 351 and a slider 352 movably arranged along the axial direction of the pump head 1. The slider 352 has an engaged position and a disengaged position along the axial direction of the pump head 1, and the slider 352 can reciprocate between the engaged position and the disengaged position. Figure 6 As shown, when the slider 352 falls, it is in the engaged position; Figure 7 As shown, when the slider 352 is lifted, it is in the separation position. The second part includes a first retaining wall 361 and a second retaining wall 362 arranged opposite to each other along the circumference of the pump 2; when the rotation-limiting block 351 rotates with the pump head 1 until it abuts against the first retaining wall 361, the slider 352 moves axially to the engagement position and abuts against the second retaining wall 362, locking the circumferential position of the pump head 1 relative to the pump 2, as shown in FIG. Figure 9 When the pump head 1 and the pump unit 2 need to be unlocked, the slider 352 moves axially away from the engagement position ( Figure 9 When the pump head 1 is disengaged from the second retaining wall 362, it is no longer blocked by the second retaining wall 362. At this time, the pump head 1 can rotate circumferentially along the direction in which the rotation limit block 351 is away from the first retaining wall 361. Figure 10 shown.

[0053] Optionally, the first portion includes a second potential energy portion 37, which is used to apply a potential force toward the locking direction to the slider 352. As will be understood from the foregoing, the slider 352 is locked when it is dropped, so the locking direction of the slider 352 refers to the direction in which the slider 352 is dropped. The second potential energy portion 37 can apply a potential force toward the dropping direction to the slider 352, thereby maintaining the slider 352 in contact with the second retaining wall 362 when no external force is applied. To unlock, the slider 352 can be lifted by simply pressing the slider 352 in the lifting direction to overcome the potential force of the second potential energy portion 37, thereby lifting the slider 352 and disengaging it from the second retaining wall 362.

[0054] Optionally, the second potential energy portion 37 includes an elastic potential energy member, such as a spring or a spring. Figure 6 and Figure 9 In one embodiment, the second potential energy portion 37 includes a spring, which is axially arranged between the slider 352 and the first housing 10. In other embodiments, the second potential energy portion 37 may also include a magnetic potential energy component, such as two magnetic blocks with the same polarity arranged opposite each other, and the magnetic repulsion between the two can form a magnetic potential energy. Those skilled in the art can configure the second potential energy portion 37 according to actual needs. Preferably, the outer surface of the slider 352 is inclined downward to facilitate the operator to grip and apply force.

[0055] Please refer to Figure 8 In an alternative exemplary embodiment, the pump 2 includes a locking ring 23, which may be a part of the second housing 20 or an independently provided component fixedly connected to the second housing 20. In one embodiment, the locking ring 23 has a plurality of notches 36 recessed along the axial direction of the pump 2, and the two circumferentially opposite sidewalls of the notches 36 are respectively configured as a first retaining wall 361 and a second retaining wall 362. In the process of axially installing the pump head 1 into the pump 2, the slider 352 is not directly aligned with the notches 36 in the circumferential direction, but is aligned with the axial top surface 363 of the locking ring 23. At this time, the top surface 363 pushes against the slider 352, causing the slider 352 to move to the separation position (i.e., lifted), as shown in FIG. Figure 10 As the pump head 1 rotates circumferentially toward the locking position, when the slider 352 is aligned with the notch 36, the slider 352 moves toward the engaging position (i.e., falls) under the action of the potential force of the second potential energy portion 37 and falls into the notch 36, as shown. Figure 9 At this time, the side wall of the slider 352 abuts against the second retaining wall 362, as shown in FIG. Figure 9 and Figure 11As shown, as the slider 352 falls into the notch 36, the rotation limiter 351 rotates circumferentially with the pump head 1 to abut against the first retaining wall 361. It can be understood that the rotation limiter 351 and the slider 352 now sandwich the first retaining wall 361 and the second retaining wall 362, thereby reliably limiting the circumferential position of the pump head 1.

[0056] The above-mentioned several exemplary embodiments illustrate the mechanism of the locking assembly 3 for locking the circumferential position of the pump head 1 and the pump unit 2. Furthermore, the locking assembly 3 also includes a mechanism for locking the axial position of the pump head 1 and the pump unit 2. Optionally, the first portion includes a first abutting surface 381, and the second portion includes a second abutting surface 382; the first abutting surface 381 and the second abutting surface 382 are both arranged axially; when the pump unit 1 rotates to the locked position, the first abutting surface 381 abuts against the second abutting surface 382, ​​locking the axial position of the pump head 1 relative to the pump unit 2.

[0057] The first abutment surface 381 and the second abutment surface 382 are a pair of opposing surfaces. After the pump head 1 is axially installed into the pump unit 2, the first abutment surface 381 and the second abutment surface 382 are axially located on the same plane. As the pump head 1 rotates toward the locked position, the first abutment surface 381 and the second abutment surface 382 overlap and abut, thereby limiting the relative axial position of the pump head 1 and the pump unit 2, preventing the pump head 1 from being disengaged from the pump unit 2.

[0058] Please refer to Figure 12 In one embodiment, the pump head 1 has a circumferential guide groove 12, and the inner side of the locking ring 23 of the pump unit 2 has a cam (not shown) that matches the guide groove 12. After the pump head 1 is axially installed in the pump unit 2, the cam and the guide groove 12 are axially aligned, but circumferentially offset. As the pump head 1 rotates toward the locked position, the cam gradually engages the guide groove 12 until the pump head 1 is fully engaged in the guide groove 12, locking the axial position of the pump head 1. It will be understood that at this point, the lower surface of the guide groove 12 is configured as the first abutment surface 381, while the lower surface of the cam is configured as the second abutment surface 382. It will be understood that the guide groove 12 is not limited to being provided on the pump head 1; the guide groove 12 can also be provided on the pump unit 2, with the matching cam provided on the pump head 1. Those skilled in the art will appreciate and adapt the above description.

[0059] Preferably, the inlet end of the guide groove 12 has a guide slope 121, which is used to guide the convex tooth to gradually move toward the first abutment surface 381 until the convex tooth abuts against the first abutment surface 381. The setting of the guide slope 121 allows the convex tooth to be easily aligned with the guide groove 12 when the pump head 1 is axially installed in the pump machine 2 and rotated toward the locking position, so that the two are engaged. Furthermore, in some embodiments, through the abutment between the convex tooth and the guide slope 121, as the pump head 1 rotates circumferentially, the axial magnetic repulsion between the rotor 11 and the stator 21 is gradually resisted, so that the second abutment surface 382 on the convex tooth can reliably abut against the first abutment surface 381 in the guide groove 12.

[0060] Please refer to Figures 6 to 8 In another embodiment, the pump head 1 has a protruding tooth 13 protruding radially outward, and the locking ring 23 of the pump unit 2 has a top cover 231. The upper surface of the protruding tooth 13 is configured as a first abutting surface 381, and the lower surface of the top cover 231 is configured as a second abutting surface 382.

[0061] When the pump head 1 is axially installed into the pump unit 2, the protruding teeth 13 are not circumferentially aligned with the top cover 231, but are aligned with the notch 36. This allows the protruding teeth 13 to fall into the notch 36 and be axially positioned below the top cover 231. The pump head 1 then rotates toward the locked position, and the protruding teeth 13 gradually move under the top cover 231. When the pump head 1 reaches the locked position, the slider 352, under the action of the potential force of the second potential energy portion 37, moves toward the engaged position (i.e., falls), preferably abutting against the bottom surface of the notch 36. This effectively applies a force to the entire pump head 1 in a direction away from the pump unit 2. Under the action of this force, the protruding teeth 13 tend to move upward, allowing the first abutment surface 381 and the second abutment surface 382 to reliably abut and contact, thereby limiting the relative axial position of the pump head 1 and the pump unit 2. Optionally, the protruding teeth 13 and the rotation limiter 351 can be integrated into one component, i.e., they can be reused and form the same component.

[0062] Based on the above configuration, during installation, the pump head 1 only needs to be axially inserted into the pump unit 2, and then rotated to securely lock the pump head 1 in the pump unit 2. To remove the pump head 1, simply operate the drive end 322 or slider 352 in the locking assembly 3 and rotate the pump head 1 in the opposite direction to remove it axially from the pump unit 2. This provides convenient operation and reliable locking.

[0063] Furthermore, since the split pump device of this embodiment can only operate the pump head 1 during installation without additional locking operation steps, once the assembly is not in place, or the driving end 322 or the slider 352 in the locking component 3 is accidentally touched during the operation of the pump head 1, causing the pump head 1 to be separated from the pump machine 2, while the pump machine 2 is still running, it is easy to affect the safety of the operation.

[0064] To this end, the split pump device of this embodiment also includes an in-situ detection sensor 4, which is an electronic detection component independent of the locking component 3. It can detect whether the pump head 1 is installed in place or whether the pump head 1 is detached, thereby knowing the locking status of the locking component 3, and then controlling the operation of the pump machine 2 according to the locking status of the locking component 3, realizing double insurance verification of assembly reliability, and effectively improving the assembly reliability and safety of the split pump device.

[0065] Optionally, the presence detection sensor 4 includes an eddy current sensor 41 and / or a Hall sensor 42 .

[0066] Please refer to Figure 3 and Figure 4 , which shows an example of an eddy current sensor 41. The eddy current sensor 41 is arranged in the pump machine 2, specifically on the outside of the recessed cavity 200, preferably close to the outside of the recessed cavity 200. When the pump head 1 is axially installed into the recessed cavity 200 of the pump machine 2, the eddy current sensor 41 can detect the eddy current information of the rotor 11, thereby obtaining the in-place information of the pump head 1. The in-place information of the pump head 1 can be installed or not installed. Installed means that the pump head 1 is installed into the recessed cavity 200 of the pump machine 2 and is located at a predetermined axial position. At this time, the zero point distance between the rotor 11 and the eddy current sensor 41 should not be greater than a first threshold value (such as 200um). Not installed means that the pump head 1 is not installed into the pump machine 2, or the axial position of the pump head 1 in the recessed cavity 200 is not at a predetermined axial position, and the zero point distance between the rotor 11 and the eddy current sensor 41 is less than the first threshold value. At this time, the pump machine 2 should be configured to prohibit startup.

[0067] After the pump head 1 is installed and the pump unit 2 is started, if an accident occurs during operation and the pump head 1 is dislodged from the pump unit 2, this can also be detected by the eddy current sensor 41. In one exemplary embodiment, after the pump unit 2 is started, if the eddy current information detected by the eddy current sensor 41 is close to the initial value when the pump head 1 is not installed, and the continuous position fluctuation of this eddy current information is less than a second threshold value (e.g., 2 μm), it can be determined that the pump head 1 has dislodged from the pump unit 2, and the pump unit 2 should be configured to shut down. In another exemplary embodiment, when the coil command output duty cycle of the stator 21 reaches an upper limit (e.g., 0.98) and is maintained for a specified time (e.g., 1 second), it can also be used to determine that the pump head 1 has dislodged from the pump unit 2.

[0068] Please refer to Figure 13 and Figure 14, which shows an example of a Hall sensor 42. The Hall sensor 42 is disposed within the pump 2, specifically in an area adjacent to the trigger 32. Optionally, a magnet 43 is disposed within the trigger 32. When the locking tongue 321 of the trigger 32 is depressed, the Hall sensor 42 and the magnet 43 are axially aligned, at which point the Hall sensor 42 outputs a first signal (e.g., a high level). When the locking tongue 321 of the trigger 32 is raised, the Hall sensor 42 and the magnet 43 are axially offset, at which point the Hall sensor 42 outputs a second signal (e.g., a low level). Thus, based on the output signal of the Hall sensor 42, information about the pump head 1's position can be obtained. The pump head 1's position information can be either fully installed or not fully installed. Fully installed means that the locking tongue 321 of the trigger 32 is depressed, engaging and locking the locking tongue 31 on the pump head 1. Not fully installed means that the locking tongue 321 of the trigger 32 is raised, releasing the locking tongue 31 on the pump head 1. When the in-place information indicates that the pump 2 is not installed in place, the pump 2 is configured to be prohibited from starting or shutting down.

[0069] It will be appreciated that, in another embodiment, the Hall sensor 42 may be positioned below the notch 36 in the pump 2, with the corresponding slider 352 being provided with a magnet 43. When the slider 352 moves to the engaged position and falls into the notch 36, the Hall sensor 42 and the magnet 43 align and approach, at which point the Hall sensor 42 outputs a first signal. When the slider 352 moves to the disengaged position or is not in the corresponding position within the notch 36, the Hall sensor 42 outputs a second signal.

[0070] The eddy current sensor 41 and the Hall sensor 42 can be provided separately or together, but this embodiment is not limited thereto.

[0071] In summary, the split pump device provided by the present invention includes: a pump head, a pump machine, a locking assembly, and an in-position detection sensor; the pump head is detachably connected to the pump machine; the locking assembly includes a first part provided on the pump head and a second part provided on the pump machine, and the locking assembly is configured so that after the pump head is axially installed in the pump machine, the first part cooperates with the second part as the pump head rotates circumferentially to lock the position of the pump head relative to the pump machine in the axial and circumferential directions; the in-position detection sensor is provided on the pump machine for obtaining in-position information of the pump head; the pump machine is configured to prohibit starting or shutting down when the in-position information indicates that the pump head is not installed or is not installed in place. With such a configuration, on the one hand, the pump head can be locked to the pump machine through the locking assembly, and on the other hand, the in-position information of the pump head can be obtained through the provision of the in-position detection sensor. Therefore, after the pump head is installed into the pump machine, the pump head's in-position information can be used to determine whether the pump head is reliably installed. Combined with the locking of the locking component, a double-insurance verification of the assembly reliability can be achieved, effectively improving the assembly reliability and safety of the split pump device.

[0072] It should be noted that the above embodiments can be combined with each other. The above description is only a description of the preferred embodiments of the present invention and does not limit the scope of the present invention. Any changes or modifications made by ordinary technicians in the field of the present invention based on the above disclosure are within the scope of protection of the present invention.

Claims

1. A split pump device, characterized in that: include: Pump head, pump motor, locking assembly and in-position detection sensor; The pump head is detachably connected to the pump machine; the locking assembly includes a first portion provided on the pump head and a second portion provided on the pump machine, and the locking assembly is configured such that, after the pump head is axially installed in the pump machine, the first portion cooperates with the second portion as the pump head rotates circumferentially to lock the position of the pump head relative to the pump machine in the axial and circumferential directions; The in-situ detection sensor is provided on the pump machine for obtaining in-situ information of the pump head; the pump machine is configured to prohibit starting or shutting down when the in-situ information indicates that the pump head is not installed or is not installed in place.

2. The split pump device according to claim 1, characterized in that: The first part includes a locking head arranged along the radial direction of the pump head; the second part includes a trigger and a rotating shaft, the trigger has a locking tongue, the trigger is rotatably arranged on the pump machine around the rotating shaft, and the trigger is configured to achieve engagement and separation of the locking tongue and the locking head by rotating around the rotating shaft; when the locking tongue engages with the locking head, the circumferential position of the pump head relative to the pump machine is locked.

3. The split pump device according to claim 2, characterized in that: The second portion includes a first potential energy portion for applying a potential force toward a locking direction to the trigger.

4. The split pump device according to claim 2, characterized in that: The lock head and the lock tongue are configured so that when the pump rotates toward the locking position, the lock head drives the trigger to rotate in the unlocking direction by pushing the lock tongue. After the lock head passes over the lock tongue, the trigger rotates in the locking direction and the lock tongue engages with the lock head.

5. The split pump device according to claim 2, characterized in that: The pump includes a retaining ring arranged circumferentially around the rotating shaft, and the trigger includes a bearing sleeved on the rotating shaft and a retaining platform surrounding the bearing. The retaining platform is axially matched with the retaining ring and allows circumferential relative rotation to seal the bearing and the rotating shaft.

6. The split pump device according to claim 5, characterized in that: The trigger has an annular cavity located between the stop platform and the bearing, and the annular cavity is filled with lubricating wax.

7. The split pump device according to claim 1, characterized in that: The first part includes a rotation limit block and a slider movably arranged along the axial direction of the pump head, and the second part includes a first retaining wall and a second retaining wall arranged relatively to each other along the circumference of the pump machine; when the rotation limit block rotates with the pump head until it abuts against the first retaining wall, the slider moves axially to an engaging position and abuts against the second retaining wall, locking the circumferential position of the pump head relative to the pump machine.

8. The split pump device according to claim 7, characterized in that: The first portion includes a second potential energy portion configured to apply a potential force toward a locking direction to the slider.

9. The split pump device according to claim 1, characterized in that: The first part includes a first abutment surface, and the second part includes a second abutment surface; the first abutment surface and the second abutment surface are both arranged axially; when the pump rotates to a locked position, the first abutment surface abuts against the second abutment surface, locking the axial position of the pump head relative to the pump.

10. The split pump device according to claim 1, characterized in that The in-situ detection sensor includes an eddy current sensor and / or a Hall sensor.

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