One-way valve structure capable of achieving automatic liquid suction of infusion pump

Abstract

The utility model relates to the technical field of infusion pumps, and discloses a one-way valve structure capable of realizing automatic liquid suction of an infusion pump, which comprises an infusion pump, a liquid storage tank arranged in the infusion pump, and a liquid suction device arranged in the infusion pump. The liquid suction device comprises a one-way valve body, a fixing block, a mounting opening, a fixing frame, a sliding groove, a sliding rod, a sliding block, a connecting block, an L-shaped clamping block, an L-shaped notch, a fixing cylinder, a limiting spring, a pulling rod, a fixing frame and a protection device. The one-way valve body is connected with the mounting opening for use, then liquid is sucked through the liquid suction pipe, at the moment, the pull rod is reset under the elastic force of the limiting spring so as to drive the lower end of the L-shaped clamping block to be fixedly connected with the L-shaped notch, and therefore the fixing frame is connected with a fixing block on the side wall of the one-way valve body in a clamped mode through the L-shaped clamping block at the lower end of the fixing frame.

Description

Technical Field

[0001] The utility model relates to the technical field of infusion pumps, in particular to a one-way valve structure capable of realizing automatic liquid aspiration of an infusion pump. Background Art

[0002] Nowadays, infusion pumps are usually mechanical or electronic control devices, which control the infusion speed by acting on the infusion catheter. The infusion pumps of liquid chromatography systems currently known in the market, especially analytical liquid phase infusion pumps, are used because of their relatively small flow rates.

[0003] At present, when the infusion pump is initially turned on, liquid needs to be added to the inside of the infusion pump. Currently, this is done manually using a suction tool with a relatively large suction cavity, such as a syringe, to ensure that the mobile phase is sucked into the infusion pump, thereby facilitating the use of the device.

[0004] Since the suction cavity of the infusion pump is relatively small, when the infusion pump is initially turned on, it is difficult for the mobile phase to reach the infusion pump by simply relying on the infusion pump to suck liquid. Although manual suction operation can meet the use requirements, manual suction will increase the working time and is inconvenient to operate, thus affecting work efficiency. In view of this, we propose a one-way valve structure that can realize automatic suction of the infusion pump. Utility Model Content

[0005] The utility model aims to provide a one-way valve structure capable of realizing automatic liquid aspiration of an infusion pump, so as to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solution: a one-way valve structure capable of realizing automatic liquid suction of an infusion pump, comprising an infusion pump, a liquid storage tank being arranged inside the infusion pump, a liquid suction device being arranged inside the infusion pump, and the liquid suction device comprising:

[0007] A one-way valve body, wherein the one-way valve body is arranged inside the infusion pump, and both side walls of the one-way valve body are fixedly installed with fixing blocks, and the side walls of the liquid storage tank are provided with a mounting opening, and both side walls of the mounting opening are fixedly installed with fixing frames;

[0008] A slide groove, wherein the slide groove is provided on the inner wall of the fixed frame, the inner wall of the slide groove is fixedly connected to a sliding rod, the surface of the sliding rod is slidably connected to a sliding block, the side wall of the sliding block is fixedly connected to one end of a connecting block, the other end of the connecting block is fixedly connected to an L-shaped card block, and the surface of the fixed block is provided with an L-shaped notch;

[0009] A fixed cylinder, wherein the fixed cylinder is fixedly connected to the inner wall of the fixed frame, the inner wall of the fixed cylinder is fixedly connected to one end of a limit spring, the other end of the limit spring is fixedly connected to a pull rod, and one end of the pull rod away from the limit spring passes through the fixed frame;

[0010] A protective device is arranged on the inner wall of the infusion pump.

[0011] Preferably, the protective device includes a sleeve, which is fixedly mounted on the inner wall of the infusion pump, the inner wall of the sleeve is fixedly connected to a damper, the upper end of the damper is fixedly connected to a disc, the upper end of the disc is fixedly connected to a support rod, and the upper end of the support rod is fixedly connected to a support seat.

[0012] Preferably, the upper end of the support seat is in contact with the lower end of the one-way valve body.

[0013] Preferably, one end of the pulling rod located outside the fixing frame is fixedly connected to the pulling block.

[0014] Preferably, the L-shaped notch and the L-shaped block are matched.

[0015] Preferably, a liquid suction tube is fixedly mounted on one end of the one-way valve body away from the liquid storage tank.

[0016] Compared with the prior art, the utility model provides a one-way valve structure that can realize automatic liquid aspiration of an infusion pump, which has the following beneficial effects:

[0017] 1. The one-way valve structure capable of realizing automatic liquid suction of the infusion pump is provided with a liquid suction device so as to facilitate the liquid filling work inside the infusion pump by adding a one-way valve body. The user can connect the L-shaped block on the side wall of the installation port with the fixed block on the side wall of the one-way valve, so that the two can be easily installed and disassembled, thereby facilitating the use of the device without manual infusion.

[0018] 2. The one-way valve structure that can realize automatic liquid suction of the infusion pump is provided with a protective device so as to protect the one-way valve body when it shakes during operation. The one-way valve body is connected to the support rod inside the sleeve through the support seat, and the damper under the support rod is used for buffering to facilitate people to use the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0020] Figure 2 This is a front sectional structural schematic diagram of the utility model;

[0021] Figure 3 This is an enlarged structural diagram of part A of the utility model;

[0022] Figure 4 This is an enlarged structural diagram of part B of the utility model;

[0023] Figure 5 It is a schematic diagram of the enlarged structure of part C of the utility model.

[0024] In the figure: 1. infusion pump; 2. liquid storage tank; 3. liquid suction device; 31. one-way valve body; 32. fixing block; 33. mounting port; 34. fixing frame; 35. slide groove; 36. sliding rod; 37. sliding block; 38. connecting block; 39. L-shaped block; 310. L-shaped notch; 311. fixing cylinder; 312. limit spring; 313. pulling rod; 4. protective device; 41. sleeve; 42. damper; 43. disc; 44. support rod; 45. support seat; 5. pulling block; 6. liquid suction tube. DETAILED DESCRIPTION

[0025] like Figure 1-Figure 5 As shown, the utility model provides a technical solution: a one-way valve structure capable of realizing automatic liquid suction of an infusion pump, comprising an infusion pump 1, a liquid storage tank 2 is arranged inside the infusion pump 1, a liquid suction device 3 is arranged inside the infusion pump 1, and the liquid suction device 3 comprises: a one-way valve body 31, the one-way valve body 31 is arranged inside the infusion pump 1, a fixing block 32 is fixedly installed on both side walls of the one-way valve body 31, a mounting port 33 is arranged on the side wall of the liquid storage tank 2, a fixing frame 34 is fixedly installed on both side walls of the mounting port 33, a slide groove 35 is opened on the inner wall of the fixing frame 34, and the inner wall of the slide groove 35 is fixed A sliding rod 36 is fixedly connected, and the surface of the sliding rod 36 is slidingly connected to a sliding block 37. The side wall of the sliding block 37 is fixedly connected to one end of a connecting block 38, and the other end of the connecting block 38 is fixedly connected to an L-shaped clamping block 39. An L-shaped groove 310 is provided on the surface of the fixed block 32. A fixed cylinder 311 is fixedly connected to the inner wall of the fixed frame 34, and one end of a limit spring 312 is fixedly connected to the inner wall of the fixed cylinder 311. The other end of the limit spring 312 is fixedly connected to a pulling rod 313, and the end of the pulling rod 313 away from the limit spring 312 passes through the fixed frame 34. A protective device 4 is provided on the inner wall of the infusion pump 1.

[0026] Specifically, the liquid suction device 3 of the technical solution of the utility model includes: a one-way valve body 31, a fixed block 32, a mounting port 33, a fixed frame 34, a slide groove 35, a sliding rod 36, a sliding block 37, a connecting block 38, an L-shaped block 39, an L-shaped groove 310, a fixed cylinder 311, a limit spring 312, a pulling rod 313, a fixed frame 34, and a protective device 4.

[0027] In one embodiment of the present invention, the one-way valve body 31 is arranged inside the infusion pump 1, and the side walls on both sides of the one-way valve body 31 are fixedly installed with fixed blocks 32, and the side walls of the liquid storage tank 2 are provided with mounting ports 33, and the two side walls of the mounting ports 33 are fixedly installed with fixed frames 34, and a slide groove 35 is provided on the inner wall of the fixed frame 34, and the inner wall of the slide groove 35 is fixedly connected to a sliding rod 36, and the surface of the sliding rod 36 is slidably connected to a sliding block 37, and the side wall of the sliding block 37 is fixedly connected to one end of a connecting block 38, and the other end of the connecting block 38 is fixedly connected to an L-shaped block 39, and an L-shaped notch 310 is provided on the surface of the fixed block 32, and a fixed cylinder 311 is fixedly connected to the inner wall of the fixed frame 34, and one end of a limit spring 312 is fixedly connected to the inner wall of the fixed cylinder 311, and the other end of the limit spring 312 is fixedly connected to a pulling rod 313, and the end of the pulling rod 313 away from the limit spring 312 passes through the fixed frame 34, and the liquid suction device 3 is provided to facilitate the liquid suction. The one-way valve body 31 is added to the infusion pump 1 to add liquid. The one-way valve body 31 is connected to the installation port 33 for use, and then the liquid is sucked through the suction tube 6. During installation, the user can connect the one-way valve body 31 to the installation port 33, and then the user drives the L-shaped block 39 to move by pulling the pull rod 313, so that the lower end of the L-shaped block 39 enters the L-shaped groove 310 on the upper surface of the fixing block 32, and then the user releases the pull rod 313. At this time, the pull rod 313 is returned to the right position under the elastic force of the limit spring 312, thereby driving the lower end of the L-shaped block 39 to be connected and fixed with the L-shaped groove 310, so that the fixing frame 34 is clamped with the fixing block 32 of the side wall of the one-way valve body 31 through the L-shaped block 39 at its lower end, so that the two can be installed and disassembled conveniently, thereby facilitating the use of the device. A protective device 4 is provided on the inner wall of the infusion pump 1.

[0028] Please continue reading Figure 1-Figure 5 The protective device 4 includes a sleeve 41, which is fixedly mounted on the inner wall of the infusion pump 1. The inner wall of the sleeve 41 is fixedly connected to the damper 42. The upper end of the damper 42 is fixedly connected to the disc 43. The upper end of the disc 43 is fixedly connected to the support rod 44. The upper end of the support rod 44 is fixedly connected to the support seat 45. By setting the protective device 4, it is convenient to protect the one-way valve body 31 when it shakes during operation. The one-way valve body 31 is connected to the support rod 44 inside the sleeve 41 through the support seat 45, and buffered by the damper 42 under the support rod 44 to facilitate people to use the device. The upper end of the support seat 45 contacts the lower end of the one-way valve body 31, and the end of the pull rod 313 located on the outside of the fixed frame 34 is fixedly connected to the pull block 5. The L-shaped notch 310 and the L-shaped block 39 are adapted. The end of the one-way valve body 31 away from the liquid storage tank 2 is fixedly installed with a suction tube 6.

[0029] When working, the one-way valve body 31 is connected to the installation port 33 for use, so as to realize the function of automatic liquid suction of the liquid storage box 2 inside the infusion pump 1, and then the liquid is sucked through the liquid suction tube 6. When installing, the user can connect the one-way valve body 31 to the installation port 33, and then the user can pull the pull rod 313 to drive the L-shaped block 39 to move, so that the lower end of the L-shaped block 39 enters the L-shaped groove 310 on the upper surface of the fixing block 32, and then the user releases the pull rod 313, at this time the pull rod 313 is in The elastic force of the limit spring 312 is restored to the right position, thereby driving the lower end of the L-shaped block 39 to be connected and fixed with the L-shaped slot 310, so that the fixing frame 34 is clamped with the fixing block 32 of the side wall of the one-way valve body 31 through the L-shaped block 39 at its lower end, and the protective device 4 is used to protect the one-way valve body 31 when it vibrates during operation. The one-way valve body 31 is connected to the support rod 44 inside the sleeve 41 through the support seat 45, and is buffered by the damper 42 under the support rod 44 to facilitate people to use the device.

[0030] The above generally describes the present invention in detail, but it is obvious to a person skilled in the art that some modifications or improvements can be made to the present invention. Therefore, modifications or improvements that do not deviate from the spirit of the present invention are within the scope of protection of the present invention.

Claims

1. A one-way valve structure capable of realizing automatic liquid suction of an infusion pump, comprising an infusion pump (1), wherein a liquid storage tank (2) is arranged inside the infusion pump (1), and characterized in that: The infusion pump (1) is provided with a liquid suction device (3) inside, and the liquid suction device (3) comprises: A one-way valve body (31), the one-way valve body (31) being arranged inside the infusion pump (1), the side walls of both sides of the one-way valve body (31) being fixedly mounted with fixing blocks (32), the side walls of the liquid storage tank (2) being provided with a mounting opening (33), and the side walls of the mounting opening (33) being fixedly mounted with fixing frames (34); A slide groove (35), wherein the slide groove (35) is provided on the inner wall of the fixed frame (34), the inner wall of the slide groove (35) is fixedly connected to a sliding rod (36), the surface of the sliding rod (36) is slidably connected to a sliding block (37), the side wall of the sliding block (37) is fixedly connected to one end of a connecting block (38), the other end of the connecting block (38) is fixedly connected to an L-shaped clamping block (39), and an L-shaped notch (310) is provided on the surface of the fixed block (32); A fixed cylinder (311), the fixed cylinder (311) is fixedly connected to the inner wall of the fixed frame (34), the inner wall of the fixed cylinder (311) is fixedly connected to one end of a limit spring (312), the other end of the limit spring (312) is fixedly connected to a pulling rod (313), and the end of the pulling rod (313) away from the limit spring (312) passes through the fixed frame (34); A protective device (4), wherein the protective device (4) is arranged on the inner wall of the infusion pump (1).

2. A one-way valve structure capable of realizing automatic liquid suction of an infusion pump according to claim 1, characterized in that: The protective device (4) comprises a sleeve (41), the sleeve (41) is fixedly mounted on the inner wall of the infusion pump (1), the inner wall of the sleeve (41) is fixedly connected to a damper (42), the upper end of the damper (42) is fixedly connected to a disc (43), the upper end of the disc (43) is fixedly connected to a support rod (44), and the upper end of the support rod (44) is fixedly connected to a support seat (45).

3. A one-way valve structure capable of realizing automatic liquid aspiration of an infusion pump according to claim 2, characterized in that: The upper end of the support seat (45) contacts the lower end of the one-way valve body (31).

4. A one-way valve structure capable of realizing automatic liquid aspiration of an infusion pump according to claim 1, characterized in that: One end of the pulling rod (313) located outside the fixing frame (34) is fixedly connected to the pulling block (5).

5. The one-way valve structure capable of realizing automatic liquid aspiration of an infusion pump according to claim 1, characterized in that: The L-shaped notch (310) and the L-shaped clamping block (39) are matched with each other.

6. A one-way valve structure capable of realizing automatic liquid aspiration of an infusion pump according to claim 1, characterized in that: A liquid suction tube (6) is fixedly mounted on one end of the one-way valve body (31) away from the liquid storage tank (2).

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