Pump head clamping piece dismounting mechanism and multi-channel clamping piece type peristaltic pump head

Abstract

The utility model discloses a pump head clamping piece dismounting mechanism and a multi-channel clamping piece type peristaltic pump head, and relates to the technical field of peristaltic pumps, the pump head clamping piece dismounting mechanism comprises an elastic clamping piece movably installed on a pump head support body of the peristaltic pump head and a linkage pull rod mechanism movably connected with the elastic clamping piece in an abutting mode, the elastic clamping piece comprises a rotating end and a limiting end, the rotating end is rotationally connected to a fulcrum shaft of the pump head support body, and the limiting end is clamped to the pump head support body in a limiting mode. The linkage pull rod mechanism comprises a pull rod matched with the limiting end and a pressing vertical rod for driving the pull rod to rotate; the pulling rod is rotationally connected to the pump head support body, one end of the pulling rod is movably connected with the pressing vertical rod, the other end of the pulling rod abuts against the limiting end, the pressing vertical rod is pressed downwards, the pulling rod rotates, and the elastic clamping piece is ejected out of the limiting clamping position of the pump head support body. According to the pump head clamping piece dismounting mechanism, accurate opening of the elastic clamping piece is facilitated, misoperation can be avoided, the limitation to the installation space of the peristaltic pump head is reduced, and the use experience of a user is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of peristaltic pumps, and in particular relates to a pump head card disassembly mechanism and a multi-channel card-type peristaltic pump head. Background Art

[0002] Peristaltic pump is a commonly used pump equipment, widely used in chemical, food, pharmaceutical and other fields in industrial production. Peristaltic pump is generally composed of pump head and pump body, of which pump head is the core component of peristaltic pump. Peristaltic pump head refers to the part of peristaltic pump that can produce torsional motion to make the fluid flow forward. Card-type peristaltic pump head is a widely used product in the peristaltic pump industry. Its characteristic is that the pump head pressure block is a detachable card structure, and multiple cards can be connected in series according to demand to realize multi-channel. At present, the card is opened by pressing the elastic plate rod structure below to make the card elastically deform and escape from the limit to realize the card opening. The elastic lever of the integrated card is designed at the bottom. For the installation environment with small space below the pump head, or involving multiple channels, the lever designed at the bottom is difficult to distinguish the corresponding relationship with the card above, which brings great difficulties to the opening of the card.

[0003] Therefore, how to make the peristaltic pump card more convenient to open in a narrow installation space and make the corresponding relationship between the opening mechanism and different cards clear has become a technical problem in this field. Utility Model Content

[0004] The purpose of the utility model is to provide a pump head card disassembly mechanism and a multi-channel card-type peristaltic pump head. Under the condition of meeting the pump head installation environment, the card opening method is designed at the top, so that the opening mechanisms between different cards are clear, so as to solve the above-mentioned technical problems.

[0005] To achieve the above-mentioned purpose, in one aspect of the utility model, the utility model provides a pump head card disassembly mechanism, comprising an elastic card movably mounted on a pump head bracket body of a peristaltic pump pump head, and a linkage lever mechanism movably abutted against the elastic card, the elastic card comprising a rotating end and a limiting end, the rotating end being rotatably connected to the pump head bracket body, and the limiting end being limitedly engaged with the pump head bracket body; the linkage lever mechanism comprising a lever cooperating with the limiting end, and a pressing vertical rod driving the lever to rotate; the lever is rotatably connected to the pump head bracket body, one end of which is movably connected to the pressing vertical rod, and the other end abuts against the limiting end, pressing the pressing vertical rod downward, and the lever rotates to eject the elastic card from the limited engagement of the pump head bracket body.

[0006] Preferably, the lever comprises a pressing end and a hinged end connected at a certain angle, and a pointed corner portion is provided at the connection between the pressing end and the hinged end, and the pointed corner portion is rotatably connected to the pump head bracket body, the pressing end abuts against the limiting end of the elastic card, and the hinged end is hinged to the pressing vertical rod.

[0007] Preferably, the limiting end of the elastic card has an inclined pressing surface that abuts against the pressing end of the lever.

[0008] Preferably, the inclination angle of the inclined pressing surface is between 20° and 30°.

[0009] Preferably, the pressing end is a smooth arc end surface.

[0010] Preferably, the hinged end is provided with a convex tooth, the bottom end of the pressing vertical rod is provided with a groove interface, the convex tooth is hinged in the groove interface, and a matching gap is left between the groove interface and the convex tooth.

[0011] Preferably, the groove interface is provided with an opening facing one side, the width of the opening is smaller than the diameter of the convex tooth, and the material at the opening is an elastic deformable material.

[0012] Preferably, the opening is trumpet-shaped, wide outside and narrow inside.

[0013] Preferably, a mounting support rod is fixedly connected to the pump head bracket body, and the mounting support rod includes a limiting protrusion that is limitedly engaged with the elastic card, and a sliding hole that accommodates the pressing vertical rod to slide back and forth up and down.

[0014] In another aspect of the utility model, the utility model provides a multi-channel card-type peristaltic pump head, including a pump head bracket body, on which a plurality of pump head card disassembly mechanisms are connected side by side, the pump head card disassembly mechanism being any of the pump head card disassembly mechanisms described above, a pump roller being provided under the elastic card in the pump head card disassembly mechanism, both ends of the pump roller being rotatably connected to the pump head bracket body, and an adjustable pump tube channel for accommodating the passage of the pump tube being formed between the elastic card and the pump roller.

[0015] The utility model discloses the following technical effects:

[0016] Compared with the peristaltic pump head card disassembly mechanism in the prior art, the utility model designs the opening method to be top-opening, which can meet more and more complex installation environments; the opening button and the elastic card correspond one-to-one, which facilitates the precise opening of the elastic card, avoids the hidden dangers of misoperation, reduces the restrictions on the installation space of the peristaltic pump head, and improves the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 It is a structural schematic diagram of a peristaltic pump head in the prior art;

[0019] Figure 2 for Figure 1 A partial enlarged view of the middle A;

[0020] Figure 3 It is a structural schematic diagram of a card removal mechanism in a peristaltic pump head in the prior art;

[0021] Figure 4 This is a structural schematic diagram of the pump head card disassembly mechanism of Example 1 of the utility model;

[0022] Figure 5 This is a schematic diagram of the structure of the elastic card in the pump head card removal mechanism of Example 1 of the utility model;

[0023] Figure 6 This is an internal structural diagram of the pump head card disassembly mechanism of Example 1 of the utility model;

[0024] Figure 7 This is a schematic structural diagram of a peristaltic pump head according to Embodiment 2 of the present utility model;

[0025] Figure 8 A top view of a peristaltic pump head of Example 2 of the utility model when one of the elastic cards is opened;

[0026] Fig. 9 This is a position relationship diagram of the pull rod and the elastic card in the embodiment of the utility model;

[0027] Fig.10 It is a motion path diagram of the pull rod and the pressing vertical rod in the embodiment of the utility model;

[0028] Fig.11 This is a process diagram of the lever pushing the elastic card in the pump head card removal mechanism of an embodiment of the utility model.

[0029] Among them, 1. elastic card; 2. pressing vertical rod; 3. installing support rod; 4. lever; 5. connecting shaft; 6. pump head bracket body; 7. groove interface; 8. convex teeth; 9. pump roller; 10. support shaft; 11. rotating end slot; 12. limit slot; 13. pressing tube part; 14. inclined pressure surface; 15. cross recessed countersunk screw; 16. inner support plate; 17. outer support plate. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0031] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0032] Reference Figures 1 to 3 As shown, the peristaltic pump head of the prior art includes a plurality of elastic cards 1 arranged side by side, and a position below the elastic card 1 ( Figure 1 The elastic card 1 is pressed at the position shown in A in the figure, so that the elastic card 1 is deformed in the pressure direction and escapes from the limit position. Under the action of the spring, the card is opened. Figure 2 As shown, it is difficult to distinguish which card corresponds to which, and after the peristaltic pump head is assembled, the visual field below is limited, which makes it easier to cause confusion and cause wrong pressing. Therefore, the card removal mechanism of the prior art is inconvenient to operate; the pump head card removal mechanism of the above structure is prior art and will not be described in detail here.

[0033] Embodiment 1:

[0034] Reference Figures 4 to 6 As shown, the utility model embodiment 1 provides a pump head card disassembly mechanism, which is movably connected to the pump head bracket body 6 of the peristaltic pump head. Figure 4 As shown, the pump head card disassembly mechanism includes an elastic card 1, which includes a rotating end and a limiting end. The rotating end is rotatably connected to the pump head bracket body 6, and the limiting end is limitedly engaged with the pump head bracket body 6, and the elastic card 1 is movably connected with a linkage lever mechanism; specifically, the pump head bracket body 6 is also rotatably connected with a lever 4 that cooperates with the limiting end, and the lever 4 has a pointed corner in the middle, and the pointed corner is rotatably connected to the side of the pump head bracket body 6, one end of the lever 4 abuts against the limiting end of the elastic card 1, and the other end is hinged with a pressing vertical rod 2, and the pressing vertical rod 2 moves linearly along the height direction of the pump head bracket body 6; when the pressing vertical rod 2 is pressed, the lever 4 is driven to rotate, and the lever 4 is pushed toward the elastic card 1, so that the limiting end of the elastic card 1 is elastically deformed, and then it is disengaged from the limiting engagement to achieve disassembly.

[0035] Specifically, Figure 6As shown, a support shaft 10 is fixedly connected to the pump head support body 6. The support shaft 10 is arranged near one side edge of the peristaltic pump head. An installation support rod 3 is fixedly connected to the pump head support body 6 on the other side edge of the peristaltic pump head. The installation support rod 3 has a limit protrusion on the side facing the support shaft 10 for limit clamping of the elastic card 1. The installation support rod 3 also has a sliding hole penetrating up and down, and the pressing vertical rod 2 slides in the sliding hole and makes a linear reciprocating motion along the axial direction of the sliding hole.

[0036] Specifically, as Figure 5 shown, the elastic card 1 includes a U-shaped card body. Both sides of the card body extend downward to form a rotating end and a limit end. The rotating end is provided with a rotating end card slot 11 facing outward, and the limit end is provided with a limit card slot 12 facing outward. The rotating end card slot 11 is a U-shaped groove, and the limit card slot 12 is a square groove. The rotating end card slot 11 is cooperatively connected with the support shaft 10, and the square groove is cooperatively connected with the limit protrusion; the limit end extends toward the inner center to form a pipe pressing part 13, and the pipe pressing part 13 is recessed inward to form an arc-shaped pressing rail. The pressing rail cooperates with the roller and has a radian adapted to the roller. The gap between the two can accommodate the pump pipe to pass through, forming an adjustable pump pipe channel.

[0037] In a further optimized solution, the limit end has an inclined pressing surface 14 located below the limit card slot 12. One end of the lever 4 abuts against the inclined pressing surface 14. When the lever 4 rotates, the end abutting against the inclined pressing surface 14 swings toward the inner side of the elastic card 1, squeezing the elastic card 1 to disengage from the limit protrusion.

[0038] In a further optimized solution, the inclination angle (the angle with the vertical direction) of the inclined pressing surface 14 is between 20° and 30°.

[0039] In a further optimized solution, the elastic card 1 is any one of polytetrafluoroethylene, polyoxymethylene, ethylene-propylene rubber, butyl rubber, fluororubber, and polyether ether ketone.

[0040] Specifically, as Fig. 9As shown, the linkage lever mechanism includes a lever 4 and a pressing vertical rod 2; the lever 4 is a U-shaped seesaw, including a pressing end and a hinged end, the pressing end and the hinged end are connected at an obtuse angle, and an axial connection hole is opened at the connection position, which is used for rotationally mounting on the connecting shaft 5 of the pump head bracket body 6 to achieve rotational connection with the pump head bracket body 6, and its hinged end is provided with a hinged male end, and the bottom end of the pressing vertical rod 2 has a hinged female end, and the hinged male end cooperates with the hinged female end to form a hinge, and when the pressing vertical rod 2 is pressed downward, the lever 4 moves downward synchronously with one end hinged with the pressing vertical rod 2, and at the same time, the entire lever 4 rotates in a circle with the connecting shaft 5 as the center, so that the pressing end of the lever 4 is pushed forward; the linkage lever mechanism can convert the up and down linear motion into circular motion, and its force is converted from the downward pressing force to the pressing force perpendicular to the limit end of the elastic card 1, thereby replacing manual direct pressing on the limit end of the elastic card 1, thereby solving the technical problem raised by the utility model and realizing the convenient opening of the pump head elastic card 1.

[0041] Further optimization scheme, such as Fig. 9 As shown, the bottom end of the pressing vertical rod 2 is provided with a groove interface 7 (hinged female end), and the hinged end of the pull rod 4 is provided with a convex tooth 8 (hinged male end), and the convex tooth 8 is hinged in the groove interface 7.

[0042] A further optimization scheme is that the inner diameter of the groove interface 7 is larger than the diameter of the convex tooth 8, while its opening width is smaller than the diameter of the convex tooth 8, and the opening size of the groove interface 7 is elastically adjustable; the inner diameter of the groove interface 7 is larger, and a clearance fit is formed with the convex tooth 8, so that the convex tooth 8 can rotate freely inside it, and is allowed.

[0043] According to a further optimization scheme, the opening of the groove interface 7 is trumpet-shaped, wide outside and narrow inside, so as to facilitate the insertion of the convex teeth 8.

[0044] According to a further optimization scheme, the abutting end of the lever 4 (the end abutting against the elastic card 1) is a smooth arc end surface, forming a smooth transition.

[0045] As a further optimization scheme, a torsion spring is provided between the lever 4 and the connecting shaft 5, so that the rotation of the lever 4 has a certain resistance, thereby preventing the vertical rod 2 from being accidentally touched and pressed, resulting in malfunction.

[0046] like Fig.10 and Fig.11 As shown, Fig.10The movement process and movement path of the pressing vertical rod 2 and the pull rod 4 are shown. The pressing vertical rod 2 moves linearly in the F1 direction, and the pull rod 4 moves in a circle in the F2 direction. The movement stroke of the pressing end of the pull rod 4 = the stroke of the card out of the limit. In this case, according to the calculation of the stroke of the card out of the limit, the rotation angle a of the pull rod 4 is about 20 degrees, and the movement amplitude of the hinged end of the pull rod 4 in the left and right directions is L1 = R*(1-COSa)≈0.06R; due to the small size of R, the size of L1 is also relatively small, and the movement trajectory of the hinged end of the pull rod 4 is almost a linear movement in the up and down directions.

[0047] like Fig.11 As shown, Fig.11 (a) shows a schematic diagram of the linkage lever mechanism of the elastic card 1 in the locked state. Fig.11 (b) shows the movement of the linkage lever mechanism, and a schematic diagram of the movement process of the linkage lever mechanism when the elastic card 1 is ejected out of the limit protrusion. Fig.11 As shown in (b), when the linkage lever mechanism of the utility model is used, it is necessary to press the pressing vertical rod 2 downward, give the pressing vertical rod 2 a downward force, drive the lever 4 to rotate, and the pressing end of the lever 4 acts on the inclined pressing surface 14 of the elastic card 1, pushing the elastic card 1 to deform and complete the elastic card 1 from the limit protrusion, so as to open the elastic card 1. During the operation, since the lever 4 rotates within a certain angle with the connecting shaft 5 as the center, its hinged end has a displacement in the left and right directions in addition to the up and down movement, while the pressing vertical rod 2 only moves in the vertical direction, so there is enough gap between the lever 4 and the pressing vertical rod 2 at the hinge, and the gap should be larger than the left and right movement amplitude L1 of the hinged end of the lever 4 to meet the dimensional deviation of the lever 4 under rotation; this patent reduces the left and right movement stroke of the hinged end through dimensional design, thereby shortening the required matching gap and increasing the efficiency of the structure in converting movement.

[0048] Embodiment 2:

[0049] Reference Figure 7 and Figure 8As shown, Example 2 of the utility model provides a multi-channel card-type peristaltic pump head, including a pump head bracket body 6, and a plurality of pump head card disassembly mechanisms, wherein the pump head card disassembly mechanism is the pump head card disassembly mechanism described in Example 1; wherein, the pump head bracket body 6 includes an inner support plate 16 and an outer support plate 17 arranged on the outermost side, and two upper and lower support shafts 10 are connected between the inner support plate 16 and the outer support plate 17. Specifically, the two ends of the support shaft 10 are fixed by cross-slot countersunk screws 15 that penetrate the inner support plate 16 and the outer support plate 17, and a plurality of elastic cards 1 are clamped side by side on the support shaft 10 located above, and a roller cavity for accommodating a pump roller 9 to enter is formed between the elastic card 1 and the pump head bracket body 6, and the pump roller 9 is rotatably connected to the pump head bracket body 6, and an adjustable pump tube channel is formed between the pump head card disassembly mechanism and the pressure rail, and the adjustable pump tube channel can accommodate the pump tube to pass through; by adjusting the connection height between the pump head card disassembly mechanism and the pump head bracket body 6, the size of the gap of the adjustable pump tube channel can be adjusted.

[0050] Specifically, in this embodiment, a plurality of channels are provided, and each channel is independently provided with a pump head card disassembly mechanism, so that each channel can be independently adjusted and controlled, and the flow and pressure of each channel can be adjusted according to actual usage conditions.

[0051] Specifically, the number of pump head card disassembly mechanisms is set according to the number of channels of the peristaltic pump head. In the present embodiment, the number of the multi-channel card-type peristaltic pump heads is 12. In other embodiments, it can be designed as 8 channels, 10 channels, 16 channels, 20 channels, 24 channels, etc. as needed.

[0052] It should be understood that the prior art has disclosed the basic structure and working principle of a multi-channel peristaltic pump head, which is only briefly introduced here: the peristaltic pump head is used to connect with the driver, and the roller rotates under the drive of the driver, thereby squeezing the pump tube passing through the peristaltic pump head, and driving the fluid in the pump tube to move forward. In this embodiment, the roller is rotatably connected to one side of the pump head support body 6 and is transmission-connected to the driver (not shown in the figure); the elastic card 1 is located above the roller and is movably connected to the pump head support body 6; an adjustable pump tube channel for accommodating the pump tube to pass through is formed between each elastic card 1 and the roller, and the pump tube passes through the adjustable pump tube channel, and the forward propulsion of the fluid in the pump tube is achieved under the rotation of the roller.

[0053] Compared with the traditional peristaltic pump head, the utility model changes the opening method of the elastic card 1 to top opening, which can meet more and more complex installation environments; the opening button (pressing the vertical rod 2) and the elastic card 1 correspond one to one, which facilitates the accurate opening of the elastic card 1 and avoids the hidden dangers of misoperation.

[0054] The parts not described in detail in the present invention are all conventional technical means known to those skilled in the art.

[0055] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0056] The embodiments described above are only descriptions of the preferred methods of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should fall within the protection scope determined by the claims of the present invention.

Claims

1. A pump head card removal mechanism, characterized in that: The invention comprises an elastic card (1) movably mounted on a pump head support body (6) of a peristaltic pump head, and a linkage lever mechanism movably abutted against the elastic card (1), wherein the elastic card (1) comprises a rotating end and a limiting end, wherein the rotating end is rotatably connected to a support shaft (10) of the pump head support body (6), and the limiting end is limitedly engaged with the pump head support body (6); the linkage lever mechanism comprises a lever (4) matched with the limiting end, and a pressing vertical rod (2) driving the lever (4) to rotate; the lever (4) is rotatably connected to the pump head support body (6), one end of which is movably connected to the pressing vertical rod (2), and the other end of which is engaged with the limiting end, so as to press the pressing vertical rod (2) downward, and the lever (4) rotates to eject the elastic card (1) from the limiting engagement of the pump head support body (6).

2. The pump head card disassembly mechanism according to claim 1, characterized in that: The lever (4) comprises a pressing end and a hinged end connected to each other at a certain angle, wherein a sharp corner portion is provided at the connection between the pressing end and the hinged end, and the sharp corner portion is rotatably connected to the pump head bracket body (6), the pressing end is in contact with the limiting end of the elastic card (1), and the hinged end is hinged to the pressing vertical rod (2).

3. The pump head card disassembly mechanism according to claim 2, characterized in that: The limiting end of the elastic card (1) has an inclined pressing surface (14) that abuts against the pressing end of the lever (4).

4. The pump head card disassembly mechanism according to claim 3, characterized in that: The inclined pressing surface (14) has an inclination angle between 20° and 30°.

5. The pump head card disassembly mechanism according to claim 4, characterized in that: The pressing end is a smooth arc end surface.

6. The pump head card disassembly mechanism according to claim 2, characterized in that: The hinged end is provided with a convex tooth (8), the bottom end of the pressing vertical rod (2) is provided with a groove interface (7), the convex tooth (8) is hinged in the groove interface (7), and a matching gap is left between the groove interface (7) and the convex tooth (8).

7. The pump head card disassembly mechanism according to claim 6, characterized in that: The groove interface (7) is provided with an opening facing one side, the width of the opening is smaller than the diameter of the convex tooth (8), and the material at the opening is an elastic deformable material.

8. The pump head card disassembly mechanism according to claim 7, characterized in that: The opening is trumpet-shaped, wide outside and narrow inside.

9. The pump head card disassembly mechanism according to claim 1, characterized in that: The pump head bracket body (6) is fixedly connected with a mounting support rod (3), and the mounting support rod (3) comprises a limiting protrusion that is limitedly engaged with the elastic card (1) and a sliding hole that accommodates the pressing vertical rod (2) to slide back and forth up and down.

10. A multi-channel card-type peristaltic pump head, characterized in that: It comprises a pump head support body (6), on which a plurality of pump head card disassembly mechanisms are connected side by side, and the pump head card disassembly mechanism is the pump head card disassembly mechanism described in any one of claims 1 to 9, and a pump roller (9) is provided under the elastic card (1) in the pump head card disassembly mechanism, and an adjustable pump tube channel for accommodating the passage of a pump tube is formed between the elastic card (1) and the pump roller (9).

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