Gas-liquid separation and backflow prevention device

Abstract

The utility model relates to the technical field of medical instruments, in particular to a gas-liquid separation and backflow prevention device. Comprising a bottle body and an auxiliary assembly, the auxiliary assembly comprises an upper cover, an air nozzle, a floating ball and a liquid discharging pipe, a limiting baffle is arranged in the bottle body, and the limiting baffle is in sliding fit with the floating ball. Liquid is pumped into the bottle due to negative pressure, and the floating ball in the bottle floats upwards until the floating ball blocks the air nozzle, so that the whole air path is blocked by the anti-reflux bottle, and the pressure of the whole machine is unbalanced; when the system pressure is normal, positive pressure is introduced into the anti-reflux bottle, and liquid in the anti-reflux bottle is discharged out of the bottle from the liquid discharge pipe, so that the problems that in the actual use process of an anti-reflux device in the prior art, when a liquid path and a gas path encounter system faults, a reagent enters a gas path system to pollute the gas path, and the use is seriously influenced can be solved.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, in particular to a gas-liquid separation and anti-backflow device. Background Art

[0002] Blood smear is one of the most widely used laboratory testing methods in the world, and is applied to disease screening, discovery, diagnosis and monitoring. Blood smear staining refers to the method of staining blood smears with Wright's stain. Currently, most of them adopt the principle of Wright staining method. Wright's dye is a composite dye composed of acidic dye eosin and basic dye methylene blue. In the process of using medical devices for smear staining, it is necessary to coordinate the liquid path and the gas path to complete the sampling, blood dripping and staining actions. During the waste discharge process of the smearer, an anti-backflow tank is generally used as the generating end of positive pressure and negative pressure. When performing the waste discharge action, the negative pressure is connected to one end of the anti-backflow bottle, and the other end of the anti-backflow bottle is connected to the upper cover of the waste liquid bottle. Negative pressure is generated in the waste liquid bottle, and the waste liquid is sucked into the waste liquid bottle. When positive pressure is connected to the anti-backflow bottle, positive pressure is introduced into the waste liquid bottle, and the waste liquid is discharged from the waste liquid bottle.

[0003] In the actual use process of the existing anti-backflow device, when the liquid path and the gas path encounter system failures, there is a problem that the reagent enters the gas path system and pollutes the gas path, seriously affecting the use. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a gas-liquid separation and anti-backflow device, aiming at solving the problem that when the liquid path and the gas path encounter system failures in the actual use process of the existing anti-backflow device, the reagent enters the gas path system and pollutes the gas path, seriously affecting the use.

[0005] To achieve the above purpose, the utility model provides a gas-liquid separation and anti-backflow device, which includes a bottle body and also includes an auxiliary component;

[0006] The auxiliary component includes an upper cover, a gas nozzle, a floating ball and a drain pipe. The upper cover is detachably connected to the bottle body and is located at the top of the bottle body. The gas nozzle is arranged below the negative pressure port of the upper cover. The floating ball is located below the gas nozzle and is inside the bottle body. The drain pipes are all inserted into the upper cover, and the top of the drain pipe is a positive pressure port;

[0007] A limit baffle is arranged inside the bottle body, and the limit baffle is in sliding fit with the floating ball.

[0008] Among them, the auxiliary component further includes a mounting plate, and the mounting plate is detachably connected to the bottle body and is located on one side of the bottle body.

[0009] Among them, the drain pipe is a silica gel pipe, and the bottom end of the silica gel pipe is provided with an inclined port.

[0010] Among them, the floating ball is a PP hollow floating ball.

[0011] Among them, a sealing gasket is provided between the bottle body and the upper cover.

[0012] For a gas-liquid separation and anti-backflow device of the present utility model, during use, when the inside of the bottle body is dry, the inside of the anti-backflow bottle is a passage, and when positive and negative pressures are applied to it, it does not affect the normal operation of the liquid path and gas path. When a failure occurs in the liquid path and gas path systems, liquid will enter the bottle due to negative pressure, and the floating ball in the bottle will float until the floating ball blocks the air nozzle, and then the anti-backflow bottle will block the entire gas path, causing the pressure of the whole machine to be unbalanced. When the system pressure returns to normal, positive pressure is introduced into the anti-backflow bottle, and the liquid in the anti-backflow bottle is discharged from the bottle through the drain pipe, thereby solving the problem that in the prior art, when a failure occurs in the liquid path and gas path during actual use, the reagent enters the gas path system and pollutes the gas path, seriously affecting the use. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art.

[0014] Figure 1 is a schematic diagram of the internal structure of the gas-liquid separation and anti-backflow device of the present utility model.

[0015] Figure 2 is a schematic diagram of the working principle of the gas-liquid separation and anti-backflow device of the present utility model.

[0016] Figure 3 is a schematic diagram of the installation position of the limit baffle of the present utility model.

[0017] In the figure: 101 - bottle body, 102 - upper cover, 103 - air nozzle, 104 - floating ball, 105 - drain pipe, 106 - mounting plate, 107 - sealing gasket, 108 - positive pressure port, 109 - negative pressure port, 110 - limit baffle. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] The following will describe in detail the embodiments of the present utility model. The examples of the embodiments are shown in the drawings. The embodiments described below with reference to the drawings are exemplary and are intended to explain the present utility model, and should not be construed as a limitation to the present utility model.

[0019] As Figures 1 to 3 shown, among which Figure 1 is a schematic diagram of the internal structure of the gas-liquid separation and anti-backflow device, Figure 2 is a schematic diagram of the working principle of the gas-liquid separation and anti-backflow device, Figure 3It is a schematic diagram of the installation position of the limit baffle 110 of the present utility model. The present utility model provides a gas-liquid separation and anti-backflow device, which includes a bottle body 101, an auxiliary component, and a limit baffle 110. The auxiliary component includes an upper cover 102, a gas nozzle 103, a floating ball 104, a liquid discharge pipe 105, a mounting plate 106, and a sealing gasket 107. Through the foregoing solution, it is possible to solve the problem that in the prior art, when the liquid path and the gas path encounter system failures during actual use, the reagent enters the gas path system and contaminates the gas path, seriously affecting the use. It can be understood that the foregoing solution can avoid the contamination of the gas path when the liquid path and the gas path encounter system failures during use.

[0020] In this embodiment, the bottle body 101 is made of transparent plastic and is used to cooperate to form an anti-backflow bottle structure. The bottle body 101 is made of PVC material. PVC resin is a white or light yellow powder. Pure PVC is atactic and hard and brittle, and is rarely used. Different additives can be added according to different uses to make PVC plastic parts exhibit different physical and mechanical properties. By adding an appropriate amount of plasticizer to PVC resin, a variety of rigid, soft, and transparent products can be made. Rigid PVC contains little or no plasticizer and has good tensile, bending, compressive, and impact resistance, and can be used alone as a structural material. Soft PVC contains more plasticizer, and its flexibility, elongation at break, and cold resistance increase, but its brittleness, hardness, and tensile strength decrease. The density of pure PVC is 1.4 g / cm3, and the density of PVC plastic parts added with plasticizer and fillers is generally in the range of 1.15 - 2.00 g / cm3. It is estimated that about 25% of medical plastic products are PVC, mainly because the resin has low cost, wide application range, and is easy to process. PVC products for medical applications include: hemodialysis tubing, breathing masks, oxygen inhalation tubes, etc.

[0021] Among them, the upper cover 102 is detachably connected to the bottle body 101 and is located at the top of the bottle body 101. The air nozzle 103 is arranged below the negative pressure port 109 of the upper cover 102. The floating ball 104 is located below the air nozzle 103 and is inside the bottle body 101. The drain pipe 105 is inserted into the upper cover 102, and the top of the drain pipe 105 is the positive pressure port 108. The upper cover 102 is locked on the bottle body 101 by bolts. The air nozzle 103 can be directly installed below the negative pressure port 109 of the upper cover 102. After the floating ball 104 floats up, it can block the bottom port of the air nozzle 103 for sealing. The drain pipe 105 can be directly inserted into the installation ports on the upper cover 102 and the bottle body 101. The top of the drain pipe 105 is the positive pressure port 108. When a failure occurs in the liquid path system, the liquid enters from the positive pressure port 108. As the liquid rises, the floating ball 104 rises until the floating ball 104 blocks the air nozzle 103, then the liquid path and the air path can be blocked. After the failure is eliminated, the positive pressure port 108 and the negative pressure port 109 are reversed, and the liquid in the bottle is discharged from the drain pipe 105.

[0022] A limit baffle 110 is arranged inside the bottle body 101, and the limit baffle 110 is in sliding fit with the floating ball 104. A plurality of limit baffles 110 for the floating ball 104 to move in cooperation are designed inside the bottle. When the reagent is drawn into the bottle, the floating ball 104 in the anti-backflow bottle rises as the liquid level rises until the floating ball 104 blocks the air nozzle 103, blocking the negative pressure air flow. During the operation of the floating ball 104, the floating ball 104 will cooperate with the limit baffle 110 to accurately float up to block the air nozzle 103 and fall to the bottom of the bottle.

[0023] Secondly, the auxiliary component further includes a mounting plate 106. The mounting plate 106 is detachably connected to the bottle body 101 and is located on one side of the bottle body 101. The mounting plate 106 is installed on the bottle body 101 by bolts. The mounting plate 106 is provided with bolt mounting holes, which is convenient for the fixed installation of the anti-backflow bottle.

[0024] Then, the drain pipe 105 is a silicone tube, and the bottom end of the silicone tube is provided with an inclined port. The drain pipe 105 is made of silicone tube. Silicone rubber is a new type of polymer elastic material, which has excellent high temperature resistance (250 - 300 °C) and low temperature resistance (-40 - 60 °C), good physiological stability, and can withstand repeated harsh disinfection conditions. It has excellent resilience and small permanent deformation (not more than 50% at 200 °C for 48 hours), breakdown voltage of (20 - 25 KV / mm), ozone resistance, ultraviolet resistance, radiation resistance, etc. Special silicone rubber has oil resistance, so that it has good stability during use. At the same time, the bottom end of the silicone tube is provided with an inclined port, which will not affect the discharge of the reagent.

[0025] Furthermore, the floating ball 104 is a PP hollow floating ball. When methanol reagent is filled into the bottle, the floating ball 104 is higher than 3 / 5.

[0026] Finally, a sealing gasket 107 is provided between the bottle body 101 and the upper cover 102. By providing the sealing gasket 107 between the bottle body 101 and the upper cover 102, it is used to improve the sealing performance after the upper cover 102 is installed. The sealing gasket 107 is made of polyurethane sealing gasket, which is a polymer material with high wear resistance, tear resistance and compressibility. At the same time, it has good air permeability and oil resistance, which is beneficial to obtaining good sealing performance. An installation cavity for the sealing gasket 107 is provided on the bottle body 101, which is convenient for the installation of the sealing gasket 107.

[0027] When using the present utility model to solve the problem that in the prior art, when the liquid path and the gas path encounter system failures during actual use, the reagent enters the gas path system and pollutes the gas path, seriously affecting the use. When the liquid path system is operating normally, the gas enters from the positive pressure port 108 and exits from the negative pressure port 109 to ensure the stability of the liquid path and gas path system. When the liquid path system fails, the liquid enters from the positive pressure port 108 until the floating ball 104 floats up and blocks the air nozzle 103, then the liquid path and the gas path are blocked. After the gas path and liquid path system are repaired, the positive and negative pressure positions are converted, the negative pressure port 109 is converted into an air inlet, and the liquid in the bottle body 101 is discharged from the drain pipe 105. Therefore, when in use, when the inside of the bottle body 101 is dry, the inside of the anti-backflow bottle is a through path, and when positive and negative pressures are applied to it, it does not affect the normal operation of the liquid path and gas path. When the liquid path and gas path systems fail, the liquid will be sucked into the bottle due to negative pressure, and the floating ball 104 in the bottle will float up until the floating ball 104 blocks the air nozzle 103, then the anti-backflow bottle will block the entire gas path, and the pressure of the whole machine will be unbalanced. When the system pressure is normal, positive pressure is introduced into the anti-backflow bottle to discharge the liquid in the anti-backflow bottle, and then the problem that in the prior art, when the liquid path and the gas path encounter system failures during actual use, the reagent enters the gas path system and pollutes the gas path, seriously affecting the use can be solved.

[0028] The above-disclosed are only one or more preferred embodiments of the present application, and the scope of rights of the present application cannot be limited thereby. Those of ordinary skill in the art can understand all or part of the processes of implementing the above embodiments, and the equivalent changes made according to the claims of the present application still fall within the scope covered by the present application.

Claims

1. A gas-liquid separation and anti-backflow device, comprising a bottle body, characterized in that, it further comprises an auxiliary component; The auxiliary component includes an upper cover, a gas nozzle, a floating ball and a drain pipe. The upper cover is detachably connected to the bottle body and is located at the top of the bottle body. The gas nozzle is arranged below the negative pressure port of the upper cover. The floating ball is located below the gas nozzle and is inside the bottle body. The drain pipe is inserted into the upper cover, and the top of the drain pipe is a positive pressure port; A limiting baffle is arranged inside the bottle body, and the limiting baffle is slidably matched with the floating ball.

2. The gas-liquid separation and anti-backflow device according to claim 1, characterized in that, The auxiliary component further includes a mounting plate, and the mounting plate is detachably connected to the bottle body and is located on one side of the bottle body.

3. The gas-liquid separation and anti-backflow device according to claim 1, characterized in that, The drain pipe is a silica gel pipe, and the bottom end of the silica gel pipe is provided with an inclined port.

4. The gas-liquid separation and anti-backflow device according to claim 1, characterized in that, The floating ball is a PP hollow floating ball.

5. The gas-liquid separation and anti-backflow device according to claim 1, characterized in that, A sealing gasket is arranged between the bottle body and the upper cover.

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