Pressure relief separation cavity and dental handpiece waterway sampling device

Abstract

The utility model provides a kind of pressure relief separation cavity and dental handpiece waterway sampling device, pressure relief separation cavity includes: top cover portion, flow guide portion and plug-in portion are sequentially communicated from top to bottom;Top cover portion, first exhaust insertion tube and lead-in hole are equipped on it, and first exhaust insertion tube is equipped with first exhaust hole;Flow guide portion, the upper side of this flow guide portion is connected with the top cover portion, the lower side of this flow guide portion is connected with the plug-in portion, and the size of the upper side of this flow guide portion is greater than the size of the lower side of this flow guide portion;Plug-in portion, collection lead-out hole and second exhaust hole are equipped on it;And inner tube, it is arranged in flow guide portion, and the first exhaust hole and second exhaust hole are communicated;Wherein, the lead-in hole is used to be connected with the air-water exhaust pipe of the dental handpiece sealingly, and the plug-in portion is used to be connected with a water sample collection tube sealingly.

Description

Technical Field

[0001] This utility model relates to the field of medical devices, and in particular to a pressure relief separation chamber and a dental handpiece water sampling device. Background Technology

[0002] The microorganisms in the water system of dental handpieces need to be tested regularly to avoid infection. Currently, the testing method is to collect water samples directly using test tubes. However, the handpiece sprays a mixture of water and compressed air, which can splash the water sample into the environment and onto the testing personnel, causing contamination.

[0003] Patent CN214471955U discloses a quick sampling connector for water-air separation in dental handpiece tubing. Its connecting tubing includes a water inlet pipe connected to the water circuit of a dental treatment unit, a working air inlet pipe, a controller inlet pipe, and an exhaust pipe. Its sampling tubing includes a water sample collection tube connected to the water inlet pipe and air sample collection tubes connected to the working air inlet pipe and the controller inlet pipe, respectively. However, its connector structure is overly complex, with numerous tubing lines requiring separate water and air processing. This makes operation cumbersome and time-consuming, and operators are prone to misconnecting tubing, leading to sampling failure. Furthermore, it uses a method of sealing either the air or water for sampling, which can increase water and air pressure, posing a risk of machine leakage.

[0004] Therefore, it is necessary to design a pressure relief separation chamber and a dental handpiece water sampling device to improve the above-mentioned defects. Utility Model Content

[0005] The purpose of this invention is to provide a pressure relief separation chamber and a dental handpiece water sampling device. Its structure is simple and easy to operate. When the water sample mixed with air is sprayed from the dental handpiece's air-water discharge tube into the pressure relief separation chamber, the gas inside the chamber and the water sample collection tube are discharged separately through the dual-channel pressure relief design of the first exhaust pipe and the inner tube, achieving water-gas separation. The water sample collection tube collects the water sample quickly and conveniently, while preventing water and gas from spraying everywhere.

[0006] To achieve the above objectives, this utility model provides a pressure relief separation chamber and a dental handpiece water sampling device. A pressure relief separation chamber, used for dental handpiece water sampling, includes a top cover, a guide section, and a connector that are connected sequentially from top to bottom. The top cover is provided with a first exhaust pipe and an inlet hole, and the first exhaust pipe is provided with a first exhaust hole. The guide section has its upper side connected to the top cover and its lower side connected to the insertion part, and the size of the upper side of the guide section is larger than the size of the lower side of the guide section. The connector has a collection / extraction hole and a second vent hole; and An inner tube is disposed in the flow guide section and connects the first exhaust port and the second exhaust port, and the diameter of the inner tube is smaller than the diameter of the first exhaust port. The inlet hole is used for a sealed connection with the air-water discharge tube of the dental handpiece, and the plug is used for a sealed connection with a water sample collection tube.

[0007] A pressure relief and separation chamber for dental handpiece water sampling includes a top cover, a guide section and a connector that are connected sequentially from top to bottom. The top cover is provided with a first exhaust pipe and an inlet hole; A flow guide, wherein the upper dimension of the flow guide is larger than the lower dimension of the flow guide; The connector is provided with a data collection and output hole and a second exhaust hole; The first exhaust pipe is sealed and connected to the first exhaust inlet pipe, and, The inner tube is inserted into the first exhaust pipe and passes through the guide portion to communicate with the second exhaust port; The inlet hole is used for a sealed connection with the air-water discharge tube of the dental handpiece, and the plug is used for a sealed connection with a water sample collection tube.

[0008] Preferably, the diameter of the inner tube is smaller than the diameter of the first exhaust pipe.

[0009] Preferably, the connector is inserted into the inlet of the collection tube, the bottom end of the connector is a frustum-shaped structure, the bottom surface of the frustum-shaped structure has the collection outlet hole, and the second vent hole is opened on the side of the frustum-shaped structure.

[0010] Preferably, the top cover, the flow guide, and the plug are integrally formed and are funnel-shaped, wider at the top and narrower at the bottom.

[0011] Preferably, the outer side wall of the top cover is provided with a plurality of stripes for anti-slip purposes.

[0012] Preferably, a sealing ring is provided around the periphery of the inlet hole, and the air and water discharge tube of the dental handpiece is sealed to the sealing ring.

[0013] Preferably, both the first exhaust pipe and the inner pipe are transparent or semi-transparent flexible hoses; one end of the inner pipe is inserted into the second exhaust port and fits tightly with the second exhaust port.

[0014] A dental handpiece water sampling device, comprising A water sample collection tube with an opening at the top; and, The aforementioned pressure relief separation chamber; The connector of the pressure relief separation chamber is inserted into the inlet of the water sample collection tube.

[0015] Preferably, the outer wall of the connector has a first thread, and the inner wall of the water sample collection tube has a second thread, with the first thread matching the second thread.

[0016] Compared with existing technologies, the dental handpiece water sampling device provided by this utility model includes a pressure relief and separation chamber and a water sample collection tube. When the high-speed mixed fluid ejected from the dental handpiece enters the pressure relief and separation chamber, it is depressurized through a dual-channel design of the first venting tube and the inner tube. Most of the gas is first discharged through the first venting tube and the first venting pipe, avoiding water leakage and excessive pressure in the chamber. In addition, residual gas carried in the liquid flowing into the water sample collection tube and the displaced air are discharged separately through the inner tube, preventing gas from accumulating in the water sample collection tube and causing splashing. This achieves water-gas separation, rapid and convenient water sample collection, simple device structure, and easy operation, enabling safe and effective water sample collection. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of a pressure relief separation chamber according to an embodiment of the present invention; Figure 2 This is a schematic diagram of a dental handpiece water sampling device according to an embodiment of the present invention. Detailed Implementation

[0018] To provide a better understanding of the purpose, structure, features, and functions of this utility model, detailed descriptions are provided below with reference to specific embodiments.

[0019] Certain terms are used in the specification and claims to refer to specific elements. It will be understood by those skilled in the art that manufacturers may use different names to refer to the same element. This specification and claims do not distinguish elements by differences in name, but rather by differences in function. The term "comprising" throughout the specification and claims is an open-ended term and should be interpreted as "comprising but not limited to".

[0020] Reference Figures 1-2 , Figure 1 This is a schematic diagram of the structure of the pressure relief separation chamber 1 according to an embodiment of the present invention, used for water sampling in a dental handpiece. Figure 2 This is a schematic diagram of a dental handpiece water sampling device according to an embodiment of the present invention.

[0021] This invention proposes a pressure relief separation chamber 1 for water sampling in dental handpieces, and a sampling device including the component.

[0022] like Figure 1As shown, the pressure relief separation chamber 1 includes a top cover 1a, a flow guide 1b, and a plug-in part 1c connected sequentially from top to bottom. The three parts are either connected separately or integrally formed into a funnel shape that is wider at the top and narrower at the bottom. The pressure relief separation chamber 1 is transparent or semi-transparent, for example, so that the internal situation can be easily observed.

[0023] The top cover 1a is provided with a first venting tube 17 and an inlet hole 12 at intervals. The inlet hole 12 is used to seal and connect the air-water discharge tube 3 of the dental handpiece. The first venting tube 17 has a first vent hole 11 to communicate with the guide section 1b. The first venting tube 17 is located, for example, at a position off-center at the top of the top cover 1a. The first venting tube 17 is preferably a short section of hollow cylindrical tubular structure that can be used to seal and connect with the first venting tube 15. The upper side of the guide section 1b is connected to the top cover 1a, and the lower side of the guide section 1b is connected to the insertion section 1c. The size of the upper side of the guide section 1b is larger than the size of the lower side of the guide section 1b, and the inner wall is smooth to reduce fluid resistance. The bottom of the insertion section 1c has a collection and discharge hole 13 and a second vent hole 14 spaced apart from the collection and discharge hole 13.

[0024] The inner tube 16 has a diameter smaller than the diameter of the first exhaust hole 11 and smaller than the diameter of the first exhaust pipe 15.

[0025] In one embodiment, the inner tube 16 is disposed in the flow guide 1b and connects to the first exhaust port 11 and the second exhaust port 14, and the diameter of the inner tube 16 is smaller than the diameter of the first exhaust port 11. In another embodiment, the inner tube 16 passes through the first exhaust insertion tube 17, and one end of it extends downward through the flow guide 1b and connects to the second exhaust port 14. This invention is not limited to this embodiment.

[0026] Specifically, during sampling, the connector 1c is inserted into the opening 21 of the water sample collection tube 2. The water sample and gas mixture output from the dental handpiece air-water discharge tube 3 are injected at high speed into the guide section 10b through the inlet 12. After entering the guide section 1b, the flow velocity decreases due to the increased space, and a large amount of gas moves upward due to inertia and is directly and quickly discharged through the first exhaust port 11, preventing excessive pressure inside the cavity. At the same time, the water sample after preliminary water-gas separation flows into the water sample collection tube 2 below through the collection outlet 13 at the bottom of the connector 1c. The gas brought into the water sample collection tube 2 with the water sample and the displaced air are discharged separately through the second exhaust port 14 and the inner tube 16, which can effectively prevent gas from accumulating in the water sample collection tube 2 and splashing back from the opening 21.

[0027] As can be seen, this utility model has a simple structure and is easy to operate, overcoming the shortcomings of traditional sampling connectors which are complex in structure and cumbersome in operation. It only requires a single cavity to integrate the pressure relief function, effectively shortening the sampling time. Through the pressure relief separation cavity with specific holes (such as inlet hole 12, first vent hole 11, bottom collection outlet hole 13, and second vent hole 14), and the nested venting tube 17 and inner tube 16, the water sample and gas are effectively guided, allowing the water sample to be quickly collected into the water sample collection tube 2, while the gas is orderly discharged to avoid splashing, achieving safe and effective water sample collection and providing a reliable basis for subsequent microbial culture or detection.

[0028] In one embodiment, the outer diameter of the first exhaust pipe 17 is matched with the inner diameter of the selected first exhaust pipe 15. The first exhaust pipe 15 is tightly fitted onto the first exhaust pipe 17 to form an interference seal, ensuring airtightness and effectively preventing the first exhaust pipe 15 from falling off or leaking liquid at the first exhaust pipe 17 during gas discharge.

[0029] Furthermore, to ensure the airtightness of the connection between the dental chair handpiece air-water discharge pipe 3 and the pressure relief separation chamber, such as... Figure 1 As shown, a sealing ring 18 is provided around the aforementioned inlet hole 12. The sealing ring 18 is preferably made of medical-grade silicone or rubber material with good elasticity and chemical corrosion resistance. The air-water discharge pipe 3 of the dental handpiece is sealed to the sealing ring 18 to prevent the water-air mixture fluid sprayed from the dental handpiece from leaking from the connection.

[0030] In one embodiment, such as Figure 1 As shown, the top cover 1a has a cylindrical structure. The inlet hole 12 and the first venting tube 17 with the first venting hole 11 are spaced apart in the top cover 1a. The top cover 1a can provide sufficient structural strength to withstand the force of the mobile phone insertion and the tube connection. The flow guide 1b is a conical cover with an inner diameter that gradually narrows from top to bottom and a smooth inner wall to guide the water sample. The insertion part 1c is connected to the lower part of the flow guide 1b. The upper part of the insertion part 1c is preferably a hollow short cylinder c1, which is used to transition and tightly insert into the opening 21 of the water sample collection tube 2. The bottom end of the insertion part 1c is specifically designed as an inverted frustum structure c2 (i.e., in the shape of an inverted frustum). The bottom surface of the inverted frustum structure c2 has the aforementioned collection and outlet hole 13, and the second vent hole 14 is opened on the side of the inverted frustum structure c2. This allows the second vent hole 14 to always be located at the top of the inside of the water sample collection tube 2, which can most effectively discharge the gas accumulated above the liquid surface and effectively prevent the liquid from being sucked into the inner tube 16. However, this utility model is not limited thereto.

[0031] Furthermore, the aforementioned top cover 1a, guide portion 1b, and insertion portion 1c are, for example, integrally formed and have a funnel shape that is wider at the top and narrower at the bottom, avoiding assembly gaps and leakage points that may exist in the split structure, and improving the structural strength and sealing reliability of the pressure relief separation chamber 10. In addition, the funnel-shaped structure can effectively guide the water sample to the water sample collection tube 2, while allowing sufficient space and path for the gas to be separated and discharged.

[0032] In addition, to facilitate the operator in taking and turning the pressure relief separation chamber 10, in one embodiment, the cylindrical outer wall of the top cover 1a is machined with raised stripes that are evenly distributed along the axial (vertical) direction, improving the convenience and safety of operation.

[0033] In another embodiment, the first exhaust pipe 15 and the inner pipe 16 are medical-grade transparent or semi-transparent flexible or rigid tubes, allowing the operator to directly observe the internal condition of the pipes.

[0034] Please refer to again Figure 2 As shown, a complete dental handpiece water sampling device is disclosed. This device includes a pressure relief and separation chamber 1 (as described above, and will not be repeated here) and a water sample collection tube 2. The bottom of the pressure relief and separation chamber 1 (i.e., the insertion part 1c) is detachably inserted into the opening 21 of the water sample collection tube 2. In one embodiment, for example, the outer diameter of the insertion part 1c is slightly larger than the inner diameter of the opening 21 of the water sample collection tube, and a tight fit is formed by compression fixation; or, in another embodiment, a first thread is machined on the outside of the insertion part 1c, and a matching second thread is machined on the inside of the opening 21 of the water sample collection tube 2 to achieve a tight fit. This invention is not limited to these embodiments.

[0035] Furthermore, in one embodiment, using such Figure 2 The complete method for sampling using a dental handpiece via a water circuit with the sampling device shown above includes the following steps: S1. Device assembly: Take out the pressure relief separation chamber 1 and the water sample collection tube 2. Hold the anti-slip striped part of the pressure relief separation chamber 1 and align the plug part 1c with the tube opening 21 of the water sample collection tube 2. Then apply pressure to insert it (for interference fit) or rotate clockwise / counterclockwise to tighten it (for threaded connection) until it fits tightly and the connection is secure.

[0036] S2. Connect the air and water discharge tube 3 of the dental handpiece to the inlet hole 12 at the top of the pressure relief separation chamber 10 and form a sealed connection.

[0037] S3. Arrange the first exhaust pipe 15 and the inner pipe 16: Seal the first exhaust pipe 15 to the first exhaust insertion pipe 17, and pass one end of the inner pipe 16 through the first exhaust pipe 15 into the interior of the guide section 1b, and finally connect it tightly to the second exhaust hole 14 at the bottom (i.e., the insertion section 1c) of the pressure relief separation chamber 1.

[0038] S4. Start the dental handpiece so that it continuously sprays out a water-air mixture. The water sample and air mixture in the water path of the dental handpiece are sprayed into the pressure relief separation chamber 1 through the inlet hole 2. The water sample enters the water sample collection tube 2 through the collection outlet hole 13 at the bottom of the pressure relief separation chamber 1. At the same time, the gas in the guide section 1b is discharged through the first exhaust inlet 17 and the first exhaust pipe 15. The gas in the water sample collection tube 2 is discharged through the inner tube 16.

[0039] S5. After collection, turn off the dental handpiece, separate the dental handpiece and the pressure relief separation chamber 1, and separate the pressure relief separation chamber 1 from the water sample collection tube 2. Seal the tube opening 21 of the water sample collection tube 2 tightly and send it to the laboratory for microbial testing.

[0040] As can be seen, the dental handpiece water sampling device proposed in this utility model has a simple structure and is easy to operate, overcoming the shortcomings of traditional sampling connectors which are complex in structure and cumbersome in operation. It only requires a single cavity to integrate the pressure relief function, effectively shortening the sampling time. By setting specific holes (such as inlet hole 12, first vent hole 11, bottom collection outlet hole 13, and second vent hole 14), and nested first vent tube 17 and second vent tube 16, the water sample and gas are effectively guided, allowing the water sample to be quickly collected into the water sample collection tube 2, while the gas is orderly discharged to avoid splashing, achieving safe and effective water sample collection and providing a reliable basis for subsequent microbial culture or detection.

[0041] This utility model has been described by the above-described embodiments; however, these embodiments are merely examples for implementing this utility model. It must be noted that the disclosed embodiments do not limit the scope of this utility model. Conversely, any modifications and refinements made without departing from the spirit and scope of this utility model are within the scope of patent protection of this utility model.

Claims

1. A pressure relief and separation chamber for water sampling in a dental handpiece, characterized in that, It includes a top cover, a flow guide, and a connector that are connected sequentially from top to bottom; The top cover is provided with a first exhaust pipe and an inlet hole, and the first exhaust pipe is provided with a first exhaust hole. The guide section has its upper side connected to the top cover and its lower side connected to the insertion part, and the size of the upper side of the guide section is larger than the size of the lower side of the guide section. The connector has a collection / extraction hole and a second vent hole; and An inner tube is disposed in the flow guide section and connects the first exhaust port and the second exhaust port, and the diameter of the inner tube is smaller than the diameter of the first exhaust port. The inlet hole is used for a sealed connection with the air-water discharge tube of the dental handpiece, and the plug is used for a sealed connection with a water sample collection tube.

2. A pressure relief and separation chamber for water sampling in a dental handpiece, characterized in that, It includes a top cover, a flow guide, and a connector that are connected sequentially from top to bottom; The top cover has a first exhaust pipe and an inlet hole. A flow guide, wherein the upper dimension of the flow guide is larger than the lower dimension of the flow guide; The connector is provided with a data collection and output hole and a second exhaust hole; The first exhaust pipe is sealed and connected to the first exhaust inlet pipe, and, The inner tube is inserted into the first exhaust pipe and passes through the guide portion to communicate with the second exhaust port; The inlet hole is used for a sealed connection with the air-water discharge tube of the dental handpiece, and the plug is used for a sealed connection with a water sample collection tube.

3. The pressure relief separation chamber as described in claim 2, characterized in that, The diameter of the inner pipe is smaller than the diameter of the first exhaust pipe.

4. The pressure relief separation chamber as described in claim 2, characterized in that, The connector is used to be inserted into the inlet of the collection tube. The bottom end of the connector is in the shape of an inverted frustum. The bottom surface of the inverted frustum has the collection outlet hole, and the second vent hole is opened on the side of the inverted frustum.

5. The pressure relief separation chamber as described in claim 2, characterized in that, The top cover, the flow guide, and the plug are integrally formed and are funnel-shaped, wider at the top and narrower at the bottom.

6. The pressure relief separation chamber as described in claim 2, characterized in that, The outer wall of the top cover has multiple stripes for anti-slip purposes.

7. The pressure relief separation chamber as described in claim 2, characterized in that, A sealing ring is provided around the periphery of the inlet hole, and the air and water discharge tube of the dental handpiece is sealed to the sealing ring.

8. The pressure relief separation chamber as described in claim 2, characterized in that, Both the first exhaust pipe and the inner pipe are transparent or semi-transparent flexible hoses; one end of the inner pipe is inserted into the second exhaust port and fits tightly with the second exhaust port.

9. A dental handpiece water sampling device, characterized in that, include A water sample collection tube with an opening at the top; and, The pressure relief separation chamber as described in any one of claims 1-7; The connector of the pressure relief separation chamber is inserted into the inlet of the water sample collection tube.

10. The dental handpiece water sampling device as described in claim 9, characterized in that, The outer wall of the connector has a first thread, and the inner wall of the water sample collection tube has a second thread, with the first thread matching the second thread.

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