Anti-backflow adapter of experimental waste liquid collector

Abstract

The utility model discloses an experiment waste liquid collector anti-backflow adapter which comprises a cylinder a, a cylinder b is installed at one end of the cylinder a in a threaded connection mode, an axial through flow channel is formed in the middle of the cylinder a and the middle of the cylinder b, a one-way valve is arranged in the flow channel, the cylinder a and the cylinder b are each provided with a radial through valve sleeve, and plungers are movably connected in the valve sleeves. The one-way valve is located between the two plungers, an end cover is installed at one end of the valve sleeve in a threaded connection mode, a rotating shaft is arranged at one end of each plunger, the rotating shaft penetrates through the end cover and is rotationally connected with the end cover, a handle is fixedly installed at the outer end of the rotating shaft, and a concentric round pipe is arranged at the other end of each plunger. An inner cavity of the round pipe is communicated with the notch. The one-way valve in the adapter prevents backflow and reduces pollution during liquid suction, when disinfection is needed, the plunger is rotated through the handle to cut off a flow channel, disinfectant is injected through the round pipe of the branch, the interior can be disinfected, disassembly is not needed, and use is convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of pipeline joints, in particular to an anti-backflow rotating joint for an experimental waste liquid collector. Background Art

[0002] With the rapid development of science and technology in my country, laboratories in universities, research institutes and enterprises are constantly expanding, and the types, number and scale of laboratories are also growing. Along with this comes the pollution problem caused by laboratory waste. Laboratory waste mainly includes: solid waste, waste liquid, waste gas, and biological pollutants such as viruses and pathogenic bacteria. The laboratory waste liquid collector uses a vacuum pump to suck. Before the waste liquid is stopped, due to the interruption of negative pressure, the waste liquid in the pipeline will flow back and cause pollution. Connecting a one-way valve in the straw can prevent the waste liquid from flowing back, but it needs to be disassembled for cleaning and disinfection after a period of time or multiple uses (the channel cavity structure in the one-way valve is prone to accumulation of pollutants). Utility Model Content

[0003] The utility model aims to provide an anti-backflow adapter for an experimental waste liquid collector to solve the problems raised in the above-mentioned background technology.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an anti-backflow rotary joint for an experimental waste liquid collector, comprising a cylinder a, a cylinder b is threadedly installed at one end of the cylinder a, an axially penetrating flow channel is formed in the middle of the cylinder a and the cylinder b, a one-way valve is arranged in the flow channel, the cylinder a and the cylinder b are both provided with a radially penetrating valve sleeve, a plunger is movably connected in the valve sleeve, a vertical axially penetrating notch is arranged on the plunger, the notch is used to connect the flow channels on both sides of the plunger, the one-way valve is located between the two plungers, an end cover is threadedly installed at one end of the valve sleeve, a rotating shaft is arranged at one end of the plunger and the rotating shaft penetrates the end cover and is rotatably connected thereto, a handle is fixedly installed at the outer end of the rotating shaft, a concentric circular tube is arranged at the other end of the plunger, the outer end of the circular tube extends to the outside of the valve sleeve, and the inner cavity of the circular tube is connected to the notch.

[0005] Preferably, the plunger is provided with two annular grooves located at the upper and lower ends of the notch, and the annular grooves are used for clamping and installing the sealing ring.

[0006] Preferably, the outer end of the circular tube is sleeved with an end cap for sealing.

[0007] Preferably, the one-way valve comprises a valve core with a conical surface and a spring, wherein the spring is located between the valve core and the end of the cylinder b, and the spring applies an axial thrust to the valve core.

[0008] Compared with the prior art, the utility model has the following beneficial effects: the one-way valve inside the adapter prevents backflow and reduces pollution when aspirating liquid; when disinfection is required, the flow channel is cut off by rotating the plunger through the handle, and disinfectant is injected through the circular tube of the branch to disinfect the interior; it does not need to be disassembled and is easy to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a cross-sectional structural schematic diagram of the utility model;

[0010] Figure 2 It is a structural schematic diagram of the plunger of the utility model.

[0011] In the figure: 1. cylinder a; 2. valve core; 3. flow channel; 4. spring; 5. cylinder b; 6. plunger; 7. valve sleeve; 8. notch; 9. end cover; 10. handle; 11. round tube. DETAILED DESCRIPTION

[0012] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0013] See also Figure 1-2 The utility model provides a technical solution: an anti-backflow rotary joint for an experimental waste liquid collector, comprising a cylinder a1, one end of which is threadedly mounted with a cylinder b5, an axially penetrating flow channel 3 is formed in the middle of the cylinder a1 and the cylinder b5, a one-way valve is arranged in the flow channel 3, the one-way valve comprises a valve core 2 with a conical surface and a spring 4, the conical surface contact realizes sealing, the spring 4 is located between the valve core 2 and the end of the cylinder b5, the spring 4 applies an axial thrust to the valve core 2, and when the valve core 2 moves to the side of the cylinder b, the one-way valve can be opened.

[0014] Both the cylinder a1 and the cylinder b5 are provided with a radially penetrating valve sleeve 7, and a plunger 6 is movably connected in the valve sleeve 7. The plunger 6 is provided with two annular grooves located at the upper and lower ends of the notch 8, and the annular grooves are used for clamping and installing the sealing ring. The plunger 6 is provided with a notch 8 that penetrates vertically and axially, and the notch 8 is used to connect the flow channels 3 on both sides of the plunger 6. When the direction of the notch 8 is perpendicular to the axial direction of the flow channel 3, it is in a closed state. The one-way valve is located between the two plungers 6, and one end of the valve sleeve 7 is screwed with an end cover 9, and one end of the plunger 6 is provided with a rotating shaft, and the rotating shaft penetrates the end cover 9 and is rotatably connected thereto. A handle 10 is fixedly installed at the outer end of the rotating shaft, and a limit column for restricting the rotation angle of the handle 10 is fixedly installed on the end cover 9. The two extreme positions of the handle 10 correspond to the opening and closing of the flow channel 3. A concentric circular tube 11 is provided at the other end of the plunger 6, and the outer end of the circular tube 11 extends to the outside of the valve sleeve 7, and the inner cavity of the circular tube 11 is connected to the notch 8. The outer end of the circular tube 11 is sleeved with an end cap for blocking. When both plungers 6 are in the state of blocking the flow channel 3, disinfectant can be injected through the circular tube to disinfect the interior.

[0015] Working principle: The adapter is connected to the pipeline of the waste liquid collector in a straight-through form. The one-way valve inside the adapter prevents backflow when aspirating liquid. During disinfection, the plunger 6 is rotated by the handle 10 so that the two plungers 6 cut off the flow channel 3, and disinfectant is injected into the circular tube 11 on the inlet side. After the disinfectant disinfects the internal cavity and the one-way valve, it is discharged from the other circular tube 11. Therefore, disinfection can be achieved in the installed state, which is convenient to use.

[0016] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An anti-backflow joint for an experimental waste liquid collector, comprising a barrel a (1), one end of which is threadedly mounted with a barrel b (5), a flow channel (3) extending axially through the middle of the barrel a (1) and the barrel b (5), a one-way valve being arranged in the flow channel (3), and characterized in that: The cylinder body a (1) and the cylinder body b (5) are both provided with a radially penetrating valve sleeve (7), a plunger (6) is movably connected inside the valve sleeve (7), a notch (8) vertically penetrating the piston (6) is provided on the piston (6), the notch (8) is used to connect the flow channels (3) on both sides of the piston (6), the one-way valve is located between the two pistons (6), one end of the valve sleeve (7) is threadedly mounted with an end cover (9), one end of the piston (6) is provided with a rotating shaft, the rotating shaft penetrates the end cover (9) and is rotatably connected thereto, a handle (10) is fixedly mounted on the outer end of the rotating shaft, and the other end of the piston (6) is provided with a concentric circular tube (11), the outer end of the circular tube (11) extends to the outside of the valve sleeve (7), and the inner cavity of the circular tube (11) is connected to the notch (8).

2. The experimental waste liquid collector anti-backflow adapter according to claim 1, characterized in that: The plunger (6) is provided with two annular grooves located at the upper and lower ends of the notch (8), and the annular grooves are used for clamping and installing the sealing ring.

3. The experimental waste liquid collector anti-backflow adapter according to claim 2, characterized in that: The outer end of the circular tube (11) is sleeved with an end cap for sealing.

4. The experimental waste liquid collector anti-backflow adapter according to claim 1, characterized in that: The one-way valve comprises a valve core (2) with a conical surface and a spring (4), wherein the spring (4) is located between the valve core (2) and the end of a cylinder b (5), and the spring (4) applies an axial thrust to the valve core (2).

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