Negative pressure aspirator capable of preventing suck-back

Abstract

The utility model discloses an anti-suck-back negative pressure aspirator which comprises a liquid storage tank, a transparent observation window is embedded in the side face of the liquid storage tank, four sets of foot pads are fixedly connected to the lower portion of the liquid storage tank, and two sets of right-angle bent pipes communicated with the interior of the liquid storage tank are fixedly connected to the lower portion of the liquid storage tank. One-way liquid passing mechanisms are fixedly connected to the side faces of the right-angle bent pipes, liquid suction heads and liquid outlet heads are arranged on the side faces of the one-way liquid passing mechanisms, a limiting rod is fixedly connected to the upper portion of the liquid storage tank, an upper top plate is arranged on the upper portion of the liquid storage tank, and a limiting hole penetrating to the lower portion of the upper top plate is formed in the upper portion of the upper top plate. By means of the design of the one-way liquid passing mechanism, the suck-back phenomenon of liquid or gas in the using process is effectively prevented, when negative pressure is applied to the liquid outlet, the liquid outlet can be tightly sealed through the sealing check block, the liquid or the gas is prevented from flowing back to the liquid inlet, and therefore the stability and safety in the liquid sucking and discharging process are guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of medical equipment, in particular to an anti-backflow negative pressure aspirator. Background Art

[0002] Most of the existing negative pressure aspirators lack anti-backflow design, and the aspirators are prone to backflow, causing liquid or contaminants to be sucked into the piping system or liquid storage tank inside the device, resulting in operational failure and even equipment damage or cross-contamination, affecting the safety of subsequent operations. Therefore, an anti-backflow negative pressure aspirator is provided to solve the above problem. Utility Model Content

[0003] The purpose of the utility model is to provide a negative pressure aspirator with anti-backflow prevention in order to solve the problems raised by the above-mentioned background technology, which has the advantages of preventing liquid or gas from flowing back to the liquid inlet and internal pipeline, ensuring the stability and safety of the liquid suction and discharge process, and solving the problems raised by the above-mentioned background technology.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an anti-back-suction negative pressure aspirator, comprising: a liquid storage tank, a transparent observation window is embedded in the side of the liquid storage tank, four groups of foot pads are fixedly connected to the bottom of the liquid storage tank, two groups of right-angle elbows that penetrate the interior of the liquid storage tank are fixedly connected to the bottom of the liquid storage tank, the sides of the right-angle elbows are fixedly connected to a one-way liquid passage mechanism, the sides of the one-way liquid passage mechanism are provided with a liquid suction head and a liquid discharge head, a limiting rod is fixedly connected to the top of the liquid storage tank, an upper top plate is provided above the liquid storage tank, a limiting hole that passes through the bottom of the upper top plate is opened above the upper top plate, a sealing plug fixing block is fixedly connected to the bottom of the upper top plate, a rubber sealing plug is fixedly connected to the bottom of the sealing plug fixing block, two groups of spring grooves are opened above the liquid storage tank, and a top plate support spring is fixedly connected to the inner side of the spring groove;

[0005] The one-way liquid passage mechanism comprises a square tube shell, a fixing column is fixedly connected to the inner side of the square tube shell, an extrusion sealing mechanism is fixedly connected to the side of the fixing column, and a liquid outlet and a liquid inlet are respectively opened on both sides of the square tube shell.

[0006] As a further solution of the utility model: the extrusion sealing mechanism includes a spring box, a support spring is fixedly connected inside the spring box, the other end of the support spring is fixedly connected to a piston support rod, and the other end of the piston support rod is fixedly connected to a sealing block.

[0007] As a further solution of the utility model: the transparent observation window penetrates into the interior of the liquid storage tank, and the one-way liquid passage mechanism is provided in two groups, one group of the one-way liquid passage mechanism is connected with the right-angle elbow through the liquid inlet, and the liquid outlet of this group of the one-way liquid passage mechanism is connected with the liquid outlet head through a hose.

[0008] As a further solution of the utility model: another group of the one-way liquid passage mechanisms is connected to the right-angle elbow through the liquid outlet, and the liquid inlet of this group of the one-way liquid passage mechanisms is connected to the liquid suction head through a hose.

[0009] As a further solution of the utility model: the inner side of the square tube shell is a cavity, the liquid outlet and the liquid inlet are connected with the cavity, the fixed column is fixed in the inner cavity of the square tube shell, and liquid can pass through both sides of the fixed column.

[0010] As a further solution of the utility model: the piston support rod is slidably connected to the inner side of the spring box.

[0011] As a further solution of the utility model: the upper top plate is provided with a slot, and the other end of the top plate support spring is fixedly connected in the slot provided below the upper top plate.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] The utility model effectively prevents the back suction of liquid or gas during use through the design of a one-way liquid passage mechanism. When negative pressure is applied to the liquid outlet, the sealing block will tightly close the liquid outlet to prevent the liquid or gas from flowing back to the liquid inlet and the internal pipeline, thereby ensuring the stability and safety of the liquid suction and discharge process. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0015] Figure 2 It is a second perspective structural schematic diagram of the utility model;

[0016] Figure 3 It is a structural schematic diagram of the rubber sealing plug in the utility model;

[0017] Figure 4 It is a structural schematic diagram of the one-way liquid passage mechanism in the utility model;

[0018] Figure 5 It is a structural schematic diagram of the extrusion sealing mechanism in the utility model;

[0019] Figure 6 It is a structural schematic diagram of A in the utility model.

[0020] In the figure: 1. liquid storage tank; 2. transparent observation window; 3. foot pad; 4. one-way liquid flow mechanism; 41. square tube shell; 42. extrusion sealing mechanism; 421. spring box; 422. support spring; 423. piston support rod; 424. sealing block; 43. fixing column; 44. liquid outlet; 45. liquid inlet; 5. right-angle elbow; 6. liquid suction head; 7. liquid outlet head; 8. limiting rod; 9. upper top plate; 10. limiting hole; 11. sealing plug fixing block; 12. rubber sealing plug; 13. spring groove; 14. top plate support spring. DETAILED DESCRIPTION

[0021] 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.

[0022] In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, which are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation of the present utility model. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "set" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal connection of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances. The following is an explanation of the embodiments of the present utility model based on the overall structure of the present utility model.

[0023] Reference Figures 1 to 6In the embodiment of the utility model, a negative pressure suction device for preventing back suction comprises: a liquid storage tank 1, a transparent observation window 2 is embedded in the side of the liquid storage tank 1, four groups of foot pads 3 are fixedly connected to the bottom of the liquid storage tank 1, two groups of right-angle elbows 5 that are connected to the inside of the liquid storage tank 1 are fixedly connected to the bottom of the liquid storage tank 1, and a one-way liquid passage mechanism 4 is fixedly connected to the side of the right-angle elbow 5, and a liquid suction head 6 and a liquid outlet head 7 are arranged on the side of the one-way liquid passage mechanism 4, a limit rod 8 is fixedly connected to the top of the liquid storage tank 1, an upper top plate 9 is arranged above the liquid storage tank 1, and a The limit hole 10 runs through the bottom thereof, a sealing plug fixing block 11 is fixedly connected to the bottom of the upper top plate 9, a rubber sealing plug 12 is fixedly connected to the bottom of the sealing plug fixing block 11, two sets of spring grooves 13 are opened above the liquid storage tank 1, and a top plate support spring 14 is fixedly connected to the inner side of the spring groove 13. The transparent observation window 2 runs through the inside of the liquid storage tank 1, and the one-way liquid passage mechanism 4 includes a square tube shell 41, a fixing column 43 is fixedly connected to the inner side of the square tube shell 41, and an extrusion sealing mechanism 42 is fixedly connected to the side of the fixing column 43. The sides of the square tube shell 41 are fixedly connected. A liquid outlet 44 and a liquid inlet 45 are respectively provided, and there are two groups of one-way liquid passage mechanisms 4. One group of one-way liquid passage mechanisms 4 is connected to the right-angle elbow 5 through the liquid inlet 45, and the liquid outlet 44 of this group of one-way liquid passage mechanisms 4 is connected to the liquid outlet head 7 through a hose. The other group of one-way liquid passage mechanisms 4 is connected to the right-angle elbow 5 through the liquid outlet 44, and the liquid inlet 45 of this group of one-way liquid passage mechanisms 4 is connected to the liquid suction head 6 through a hose. The inner side of the square tube shell 41 is a cavity, and the liquid outlet 44 and the liquid inlet 45 are connected to the cavity. The fixing column 43 is on the square tube shell 41. The tube shell 41 is fixed in the inner cavity, and liquid can pass through both sides of the fixing column 43. The upper top plate 9 is provided with a groove, and the other end of the top plate support spring 14 is fixedly connected in the groove provided below the upper top plate 9. The extrusion sealing mechanism 42 includes a spring box 421, and a support spring 422 is fixedly connected inside the spring box 421. The other end of the support spring 422 is fixedly connected to a piston support rod 423, and the other end of the piston support rod 423 is fixedly connected to a sealing block 424. The piston support rod 423 is slidably connected to the inner side of the spring box 421.

[0024] The working principle of the utility model is as follows: by designing a one-way liquid passage mechanism 4, when the liquid outlet 44 provides negative pressure, liquid or gas can enter from the liquid inlet 45, press the sealing block 424 inward, so that the support spring 422 contracts, releases the sealing block 424 from the liquid inlet 45, and allows the liquid or gas to flow to the liquid outlet 44 through the liquid inlet 45; when negative pressure exists at the end of the liquid inlet 45, due to the action of the support spring 422, the sealing block 424 firmly blocks the liquid outlet 44, and the liquid or gas cannot flow from the liquid outlet 44 to the liquid inlet 45;

[0025] When the air in the liquid storage tank 1 is in a state of being exhausted, the air in the liquid storage tank 1 is discharged from the liquid outlet head 7 through the right-angle bend 5 and the one-way liquid passage mechanism 4 in sequence, and then the air in the liquid storage tank 1 is discharged from the liquid outlet head 7 through the hose.

[0026] What is described above is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A negative pressure aspirator for preventing back suction, characterized in that: include: A liquid storage tank (1), wherein a transparent observation window (2) is embedded on the side of the liquid storage tank (1), four groups of foot pads (3) are fixedly connected to the bottom of the liquid storage tank (1), two groups of right-angle elbows (5) that are connected to the inside of the liquid storage tank (1) are fixedly connected to the bottom of the liquid storage tank (1), and the sides of the right-angle elbows (5) are fixedly connected to a one-way liquid passage mechanism (4), and the side of the one-way liquid passage mechanism (4) is provided with a liquid suction head (6) and a liquid discharge head (7), and the top of the liquid storage tank (1) is fixedly connected to A limit rod (8) is provided, an upper top plate (9) is arranged above the liquid storage tank (1), a limit hole (10) is provided above the upper top plate (9) and penetrates to the bottom thereof, a sealing plug fixing block (11) is fixedly connected below the upper top plate (9), a rubber sealing plug (12) is fixedly connected below the sealing plug fixing block (11), two groups of spring grooves (13) are provided above the liquid storage tank (1), and a top plate support spring (14) is fixedly connected inside the spring groove (13); The one-way liquid passage mechanism (4) comprises a square tube shell (41), a fixing column (43) is fixedly connected to the inner side of the square tube shell (41), a pressing sealing mechanism (42) is fixedly connected to the side of the fixing column (43), and a liquid outlet (44) and a liquid inlet (45) are respectively provided on both sides of the square tube shell (41).

2. The anti-backflow negative pressure aspirator according to claim 1, characterized in that: The extrusion sealing mechanism (42) comprises a spring box (421), a support spring (422) is fixedly connected inside the spring box (421), the other end of the support spring (422) is fixedly connected to a piston support rod (423), and the other end of the piston support rod (423) is fixedly connected to a sealing block (424).

3. The anti-backflow negative pressure aspirator according to claim 1, characterized in that: The transparent observation window (2) penetrates into the interior of the liquid storage tank (1), and the one-way liquid passage mechanism (4) is provided in two groups, one group of the one-way liquid passage mechanism (4) is connected to the right-angle elbow (5) through the liquid inlet (45), and the liquid outlet (44) of the one-way liquid passage mechanism (4) of this group is connected to the liquid outlet head (7) through a hose.

4. The anti-backflow negative pressure aspirator according to claim 1, characterized in that: Another group of one-way liquid passage mechanisms (4) is connected to the right-angle elbow (5) via a liquid outlet (44), and the liquid inlet (45) of this group of one-way liquid passage mechanisms (4) is connected to the liquid suction head (6) via a hose.

5. The anti-backflow negative pressure aspirator according to claim 1, characterized in that: The inner side of the square tube shell (41) is a cavity, the liquid outlet (44) and the liquid inlet (45) are connected to the cavity, the fixing column (43) is fixed in the inner cavity of the square tube shell (41), and both sides of the fixing column (43) are open for liquid to pass through.

6. The anti-backflow negative pressure aspirator according to claim 2, characterized in that: The piston support rod (423) is slidably connected to the inner side of the spring box (421).

7. The anti-backflow negative pressure aspirator according to claim 1, characterized in that: The upper top plate (9) is provided with a slot, and the other end of the top plate support spring (14) is fixedly connected in the slot provided below the upper top plate (9).

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