Pressure relief separation cavity piece and dental handpiece waterway sampling device

Abstract

The invention provides a pressure relief separation cavity piece and a dental handpiece waterway sampling device. The pressure relief separation cavity piece comprises a top cover part, a flow guide part and an insertion part which are sequentially communicated from top to bottom, the top cover part is provided with a first exhaust insertion pipe and a lead-in hole, and a first exhaust hole is formed in the first exhaust insertion pipe; the upper side of the flow guide part is connected with the top cover part, the lower side of the flow guide part is connected with the inserting part, and the size of the upper side of the flow guide part is larger than that of the lower side of the flow guide part; a collecting and leading-out hole and a second exhaust hole are formed in the inserting part; the inner pipe is arranged in the flow guide part and is communicated with the first exhaust hole and the second exhaust hole; wherein the lead-in hole is used for being in sealed connection with an air-water discharge pipe of the dental handpiece, and the insertion part is used for being in sealed connection with a water sample collection pipe.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of medical instrument equipment, in particular to a pressure relief separation cavity and a dental handpiece waterway sampling device. BACKGROUND

[0002] The microorganisms in the waterway of the dental chair handpiece need to be detected regularly to avoid infection. The current detection method is to directly collect water samples with test tubes. However, the dental chair handpiece sprays a mixture of water and air, including water samples and compressed air. The sprayed water samples may splash onto the environment and the detection personnel, causing pollution.

[0003] Patent No. CN214471955U discloses a dental handpiece pipeline water-air separation quick sampling connector. The connecting pipe group includes a water inlet pipe, a working gas insertion pipe, a controller insertion pipe, and an exhaust insertion pipe connected to the waterway of the oral comprehensive treatment table. The sampling pipe group includes a water sample collection pipe connected to the water inlet pipe and a gas sample collection pipe connected to the working gas insertion pipe and the controller insertion pipe. However, the connector structure is too complex, and there are many pipelines that need to be handled separately. The operation is tedious and time-consuming, and the detection personnel are prone to misconnect the pipelines, leading to sampling failure. In addition, the connector uses a method of blocking one of the gas or water to perform sampling, which may increase the water and air pressure and cause leakage of the machine.

[0004] Therefore, it is necessary to design a pressure relief separation cavity and a dental handpiece waterway sampling device to improve the above-mentioned defects. SUMMARY

[0005] The present application provides a pressure relief separation cavity and a dental handpiece waterway sampling device. The structure is simple and easy to operate. When the mixed fluid of the water sample and air sprayed by the air and water discharge pipe of the dental chair handpiece is sprayed into the pressure relief separation cavity, the gas in the pressure relief separation cavity and the water sample collection pipe is discharged through the first exhaust insertion pipe and the inner pipe double-channel pressure relief design, respectively. The water and air are separated, the water sample collection pipe collects the water sample quickly and conveniently, and the water and air can be sprayed everywhere.

[0006] To achieve the above-mentioned purpose, the present application provides a pressure relief separation cavity and a dental handpiece waterway sampling device. A pressure relief separation cavity for dental handpiece waterway sampling includes a top cover part, a flow guide part, and a plug-in part connected in sequence from top to bottom; The top cover part is provided with a first exhaust insertion pipe and a guide hole. The first exhaust insertion pipe is provided with a first exhaust hole; The flow guide part is connected to the top cover part on the upper side, and connected to the plug-in part on the lower side. The size of the upper side of the flow guide part is larger than that of the lower side of the flow guide part; The plug-in part is provided with a collection guide hole and a second exhaust hole; and An inner tube is arranged in the flow guide part and communicates with the first exhaust hole and the second exhaust hole, and the diameter of the inner tube is smaller than the diameter of the first exhaust hole. The introduction hole is used for sealing connection with the air and water exhaust pipe of the dental handpiece, and the insertion part is used for sealing connection with a water sample collection pipe.

[0007] A pressure relief separation cavity for water sampling of a dental handpiece, comprising a top cover part, a flow guide part and an insertion part connected in sequence from top to bottom; The top cover part is provided with a first exhaust insertion tube and an introduction hole; The size of the upper side of the flow guide part is larger than the size of the lower side of the flow guide part; The insertion part is provided with a collection and export hole and a second exhaust hole; The first exhaust pipe is sealingly connected with the first exhaust insertion tube, and An inner tube is arranged in the first exhaust insertion tube and communicates with the second exhaust hole through the flow guide part; The introduction hole is used for sealing connection with the air and water exhaust pipe of the dental handpiece, and the insertion part is used for sealing connection with a water sample collection pipe.

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

[0009] Preferably, the insertion part is inserted into the pipe opening of the collection pipe, the bottom end of the insertion part is in the form of a reverse circular platform structure, the bottom surface of the reverse circular platform structure has the collection and export hole, and the second exhaust hole is arranged on the side surface of the reverse circular platform structure.

[0010] Preferably, the top cover part, the flow guide part and the insertion part are integrally formed and in the form of a funnel with a wide upper part and a narrow lower part.

[0011] Preferably, the outer side wall of the top cover part is provided with a plurality of stripe parts for anti-skid.

[0012] Preferably, the periphery of the introduction hole is provided with a sealing ring, and the air and water exhaust pipe of the dental handpiece is sealingly connected with the sealing ring.

[0013] Preferably, the first exhaust pipe and the inner tube are both transparent or translucent flexible hoses; one end of the inner tube is inserted into the second exhaust hole and tightly matches with the second exhaust hole.

[0014] A water sampling device for a dental handpiece, comprising A water sample collection pipe having a pipe opening at the top; and The pressure relief separation cavity; The insertion part of the pressure relief separation cavity is inserted into the pipe opening of the water sample collection pipe.

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

[0016] Compared with the prior art, the dental handpiece waterway sampling device provided by the application comprises a pressure relief separation cavity and a water sample collection tube. When the high-speed mixed fluid sprayed by the dental chair handpiece enters the pressure relief separation cavity, most of the gas is first discharged through the first exhaust insertion pipe and the first exhaust pipe by virtue of the double-channel pressure relief design of the first exhaust insertion pipe and the inner pipe, so as to avoid water leakage and excessive pressure in the cavity. In addition, the residual gas carried in the liquid flowing into the water sample collection tube and the air replaced out are separately discharged through the inner pipe, so as to prevent the gas from accumulating in the water sample collection tube to cause splashing, realize water-gas separation, and realize rapid and convenient water sample collection. The device structure is simple, the operation is convenient, and safe and effective water sample collection can be realized. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 FIG. 1 is a structural schematic view of a pressure relief separation cavity according to an embodiment of the application; Figure 2 FIG. 2 is a schematic view of a dental handpiece waterway sampling device according to an embodiment of the application. DETAILED DESCRIPTION

[0018] In order to have a further understanding of the object, structure, features and functions of the application, the following detailed description is provided in conjunction with the embodiments.

[0019] In the description and claims of the application, certain terms have been used for brevity, no unnecessary limitations are to be implied therefrom; such terms are used with their normal meanings no conflict will occur between this description and the patent claims.

[0020] REFERENCE Figures 1-2 , Figure 1 FIG. 1 is a structural schematic view of a pressure relief separation cavity according to an embodiment of the application, which is used for dental handpiece waterway sampling; Figure 2 FIG. 2 is a schematic view of a dental handpiece waterway sampling device according to an embodiment of the application.

[0021] The application provides a pressure relief separation cavity 1 for dental handpiece waterway sampling, and a sampling device comprising the component.

[0022] As Figure 1As shown, the pressure relief separation cavity 1 includes a top cover portion 1a, a flow guide portion 1b and a plug-in portion 1c in sequence from top to bottom, which are connected separately or integrally formed in a funnel shape with a wide top and a narrow bottom. The pressure relief separation cavity 1 is transparent or semi-transparent to facilitate observation of the internal conditions.

[0023] The first exhaust pipe 17 and the introduction hole 12 are arranged on the top cover portion 1a in intervals. The introduction hole 12 is used to seal the air and water discharge pipe 3 of the dental handpiece. The first exhaust pipe 17 is provided with the first exhaust hole 11 to communicate with the flow guide portion 1b. The first exhaust pipe 17 is located at the top of the top cover portion 1a and deviates from the center. The first exhaust pipe 17 is preferably a small hollow cylindrical pipe structure which can be used for sealing connection with the first exhaust pipe 15. The upper side of the flow guide portion 1b is connected with the top cover portion 1a, and the lower side of the flow guide portion 1b is connected with the plug-in portion 1c. The size of the upper side of the flow guide portion 1b is larger than that of the lower side of the flow guide portion 1b, and the inner wall is smooth to reduce fluid resistance. The bottom of the plug-in portion 1c has the collection and discharge hole 13 and the second exhaust hole 14 arranged in intervals beside the collection and discharge hole 13.

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

[0025] In one embodiment, the inner tube 16 is arranged in the flow guide portion 1b and communicates with the first exhaust hole 11 and the second exhaust hole 14. The pipe diameter of the inner tube 16 is smaller than the hole diameter of the first exhaust hole 11. In another embodiment, the inner tube 16 is arranged in the first exhaust pipe 17 and one end thereof extends downward to communicate with the second exhaust hole 14 through the flow guide portion 1b. The present application is not limited thereto.

[0026] Specifically, during sampling, the plug-in portion 1c is inserted into the pipe opening 21 of the water sample collection pipe 2. The water sample and gas mixed fluid output from the air and water discharge pipe 3 of the dental handpiece is sprayed into the flow guide portion 1b at high speed through the introduction hole 12. After the mixed fluid enters the flow guide portion 1b, the flow rate is reduced due to the expansion of the space. A large amount of gas moves upward due to inertia and is directly and quickly discharged through the first exhaust hole 11 to prevent the pressure in the cavity from being too high. At the same time, the water sample after preliminary water-gas separation flows into the water sample collection pipe 2 below through the collection and discharge hole 13 at the bottom of the plug-in portion 1c. The gas brought into the water sample collection pipe 2 with the water sample and the replaced air are then discharged separately through the second exhaust hole 14 through the inner tube 16, which can effectively prevent the gas from accumulating in the water sample collection pipe 2 and causing splashing due to backflow from the pipe opening 21.

[0027] It can be seen that the present application has simple structure and is easy to operate, overcomes the defects of complex structure and tedious operation of the traditional sampling joint, integrates the pressure relief function with only a single cavity, and effectively shortens the sampling time. Through the pressure relief separation cavity with specific hole positions (such as the introduction hole 12, the first exhaust hole 11, the bottom collection and export hole 13, and the second exhaust hole 14), and the nested exhaust cannula 17 and the inner tube 16, the water sample and the gas are effectively guided, so that the water sample is quickly collected into the water sample collection tube 2, and the gas is orderly discharged to avoid splashing, thereby realizing 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 cannula 17 matches the inner diameter of the first exhaust tube 15, the first exhaust tube 15 is tightly sleeved on the first exhaust cannula 17 to form an interference seal, which guarantees the air tightness and effectively prevents the first exhaust tube 15 from falling off or leaking liquid at the first exhaust cannula 17 during gas discharge.

[0029] Further, in order to guarantee the air tightness of the connection between the dental chair mobile phone gas and water discharge pipe 3 and the pressure relief separation cavity, as shown in the drawings, a sealing ring 18 is arranged on the periphery of the introduction hole 12, which is preferably made of medical-grade silicone or rubber material with good elasticity and chemical corrosion resistance. The dental chair mobile phone gas and water discharge pipe 3 is sealingly connected with the sealing ring 18 to prevent the water and gas mixed fluid sprayed from the dental chair mobile phone from leaking from the connection. Figure 1

[0030] In one embodiment, as shown in the drawings, the top cover part 1a is a cylindrical structure, the introduction hole 12 and the first exhaust cannula 17 with the first exhaust hole 11 are arranged at intervals in the top cover part 1a, and the top cover part 1a can provide sufficient structural strength to withstand the force of the mobile phone insertion and pipe connection. The flow guide part 1b is a conical cover with a smooth inner wall that gradually shrinks from top to bottom to guide the water sample. The plug-in part 1c is connected below the flow guide part 1b, the upper part of the plug-in part 1c is preferably a hollow short cylinder c1 for transition and tight insertion into the pipe opening 21 of the water sample collection tube 2, and the bottom end of the plug-in part 1c is specifically designed as a rounded table structure c2 (i.e. an inverted circular table shape). The bottom surface of the rounded table structure c2 has the collection and export hole 13, and the second exhaust hole 14 is arranged on the side surface of the rounded table structure c2, so that the second exhaust hole 14 is always located inside the top end of the water sample collection tube 2, which can effectively discharge the gas accumulated above the liquid surface and effectively prevent the liquid from being sucked into the inner tube 16, but the present application is not limited thereto. Figure 1

[0031] ​​Further, the top cover part 1a, the flow guide part 1b and the insertion part 1c are integrally formed and have a funnel-shaped appearance with a wide top and a narrow bottom, avoiding assembly gaps and leakage points that may exist in a split structure, and improving the structural strength and sealing reliability of the pressure relief separation chamber 10. In addition, the funnel-shaped appearance can effectively guide the water sample to the water sample collection tube 2, while providing sufficient space and path for the gas to be separated and discharged.

[0032] In addition, in order to facilitate the operator to take and screw the pressure relief separation chamber 10, in one embodiment, a plurality of protruding stripe parts are uniformly distributed on the cylindrical outer wall of the top cover part 1a in 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 translucent soft / hard pipes, allowing the operator to directly observe the internal conditions of the pipes.

[0034] Please refer to Figure 2 It is disclosed that a complete dental handpiece waterway sampling device. The dental handpiece waterway sampling device comprises a pressure relief separation chamber 1 (as described above, not repeated here) and a water sample collection tube 2. The bottom of the pressure relief separation chamber 1 (i.e. the insertion part 1c) is detachably inserted into the pipe 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 pipe opening 21 of the water sample collection tube, and a tight fit is formed by extrusion fixation; or, in another embodiment, a first thread is machined on the outside of the insertion part 1c, and a second thread that matches the first thread is machined on the inside of the pipe opening 21 of the water sample collection tube 2 to achieve a tight fit, but the present application is not limited thereto.

[0035] In addition, in one embodiment, the above-mentioned sampling device is used to sample the complete method of sampling the waterway of a dental handpiece as shown in Figure 2 The complete method of sampling the waterway of a dental handpiece comprises 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 stripe part of the pressure relief separation chamber 1, align the insertion part 1c with the pipe opening 21 of the water sample collection tube 2, and then apply pressure to insert it (for interference fit) or rotate it clockwise / counter-clockwise (for threaded connection) until a tight fit is achieved, and the connection is firm.

[0036] S2, connect the gas and water discharge pipe 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 pipe 17, and pass the inner pipe 16 through the first exhaust pipe 15 into the inside of the flow guide part 1b, and finally tightly connect the second exhaust hole 14 at the bottom of the pressure relief separation chamber 1 (i.e. the insertion part 1c).

[0038] S4, start the dental handpiece, make it continuously spray water-air mixture, the mixed fluid of water sample in the water channel of the dental handpiece and air is sprayed into the pressure relief separation cavity 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 cavity 1, at the same time, the gas in the flow guide part 1b is discharged through the first exhaust pipe 17 and the first exhaust pipe 15, and the gas in the water sample collection tube 2 is discharged through the inner pipe 16.

[0039] S5, the collection is completed, the dental handpiece is closed, the dental handpiece and the pressure relief separation cavity 1 are separated, the pressure relief separation cavity 1 is separated from the water sample collection tube 2, the pipe opening 21 of the water sample collection tube 2 is strictly sealed, and the water sample collection tube 2 is sent to the laboratory for microbial detection.

[0040] It can be seen that the dental handpiece water channel sampling device provided by the present application has the advantages of simple structure, easy operation, overcoming the defects of complex structure and cumbersome operation of the traditional sampling connector, integrating the pressure relief function with only a single cavity, effectively shortening the sampling time. By setting specific hole positions (such as the inlet hole 12, the first exhaust hole 11, the bottom collection outlet hole 13, and the second exhaust hole 14), and the nested first exhaust pipe 17 and the second exhaust pipe 16, the water sample and the gas are effectively guided, so that the water sample is quickly collected into the water sample collection tube 2, and the gas is orderly discharged, avoiding splashing, realizing safe and effective water sample collection, and providing a reliable basis for subsequent microbial culture or detection.

[0041] The present application has been described by the above-mentioned related embodiments, however, the above-mentioned embodiments are only examples of implementing the present application. It must be pointed out that the disclosed embodiments do not limit the scope of the present application. On the contrary, changes and modifications made without departing from the spirit and scope of the present application are all within the scope of the patent protection of the present application.

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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