Flow control device for microbiological detection

Abstract

The application provides a flow control device for microorganism detection, and belongs to the technical field of microorganism detection equipment, comprising a gas inlet component, a flow sensor and a proportional flow valve which are sequentially communicated through a pipeline; the gas inlet component, the flow sensor and the proportional flow valve are each provided with a joint pipe, the joint pipe is provided with a connecting structure, each connecting structure comprises a connecting shell, a plurality of arc-shaped plates and a plurality of pushing components; the connecting shell is connected to the joint pipe; a limiting cavity is arranged between the connecting shell and the joint pipe; the outer peripheral wall of the pipeline connecting end is provided with an annular groove; the plurality of pushing components correspond to the arc-shaped plates one by one; the two ends of each pushing component are connected to the arc-shaped plate and the connecting shell; through the joint pipe plug-in cooperation of the pipeline and the gas inlet position of the flow sensor, the arc-shaped plate can be plug-in cooperated with the annular groove of the pipeline, the pipeline is then axially limited, the pipeline is fixed on the gas inlet of the flow sensor, and the installation efficiency can be improved.

Description

Technical Field

[0001] This application belongs to the field of microbial detection equipment technology, and specifically relates to a flow control device for microbial detection. Background Technology

[0002] In sterile workshops such as pharmaceutical plants, it is necessary to maintain sterile conditions, which requires microbial testing to ensure that the workshop meets the specified requirements. Traditional microbial testing involves collecting gas onto petri dishes, then placing them in a constant temperature incubator for incubation, and determining the microbial concentration by the number of colonies that grow.

[0003] During the sampling process, the flow rate and air pressure are controlled by a flow control device. The existing flow control device includes an air inlet, a flow sensor, a proportional flow valve, and an air outlet connected by a pipeline. Pressure sensors are connected to both the air inlet and the air outlet. The difference between the pressure sensors at the air inlet and the air outlet can be used to determine the difference between the inlet and outlet pressures. The flow sensor can detect the flow rate in the air path, and the proportional flow valve can be adjusted to regulate the flow rate and air pressure in the air path, so as to provide stable air pressure and flow rate for subsequent detection equipment.

[0004] However, in existing flow control devices, the various components are connected through pipes, and the connection between the pipes and the components is a threaded fit, resulting in low pipe installation efficiency. Utility Model Content

[0005] This application provides a flow control device for microbial detection, aiming to solve the problem of low pipeline installation efficiency in the prior art.

[0006] To achieve the above objectives, the technical solution adopted in this application is as follows:

[0007] A flow control device for microbial detection is provided, comprising an air inlet component, a flow sensor, and a proportional flow valve connected sequentially by a pipe; each of the air inlet component, flow sensor, and proportional flow valve has a connector pipe, and the connector pipe is provided with a connection structure, each connection structure including:

[0008] A connecting housing is connected to a connector tube; a limiting cavity is provided between the connecting housing and the connector tube;

[0009] Several arc-shaped plates are slidably disposed within the limiting cavity along the radial direction of the connecting shell; the outer peripheral wall of the pipe connection end has an annular groove that engages with the arc-shaped plates to axially limit the pipe; the pipe connection end has a chamfer.

[0010] Several pushing components are provided, each corresponding to one of the arc-shaped plates; both ends of each pushing component are connected to the arc-shaped plate and the connecting housing, and the pushing direction of the pushing component is along the radial direction of the arc-shaped plate.

[0011] In one possible implementation, the arc-shaped plates are evenly distributed along the circumference of the connecting shell, and several of the arc-shaped plates can be connected end to end to form a ring structure.

[0012] In one possible implementation, the connecting housing has a radially arranged guide groove at the center of each arcuate plate, and each of the pushing components includes:

[0013] A push plate is connected to the arc-shaped plate and slides in conjunction with the guide groove; the opposite sides of the push plate contact the two sides of the guide groove to laterally limit the push plate.

[0014] The elastic element is connected at one end to the push plate and at the other end to the guide groove;

[0015] Under the elastic force of the elastic element, the arc-shaped plate can be inserted and fitted into the annular groove on the pipe.

[0016] In one possible implementation, both the push plate and the guide groove have sleeves at their ends, and the elastic element is a spring, with both ends of the spring located inside the sleeves of the push plate and the guide groove, respectively.

[0017] The sleeve has a threaded hole on its side wall and a limit bolt is connected to the sleeve. The inner end of the limit bolt is located in the gap of the spring to axially limit the spring inside the sleeve.

[0018] In one possible implementation, the push plate has a clearance groove on the side facing the pipe, and a top plate is rotatably disposed within the clearance groove;

[0019] When the arc-shaped plate is inserted into the annular groove, the top plate is in a vertical position; when the arc-shaped plate is separated from the annular groove, the top plate can be in a horizontal position and can abut against the end of the guide groove.

[0020] In one possible implementation, when the top plate is in a vertical position, the outer side of the top plate is coplanar with the side wall of the push plate; the hinge axis of the top plate is located below the top of the guide groove.

[0021] When the arc-shaped plate is inserted into the annular groove, both the push plate and the top plate abut against the end of the guide groove.

[0022] In one possible implementation, the top plate of the pusher plate protrudes from the guide groove.

[0023] In one possible implementation, the connecting housing has an internal thread, the connector tube has an external thread, and the connecting housing and the connector tube are threaded together.

[0024] In one possible implementation, the outer peripheral wall of the connector tube has a positioning step that can contact the end of the connecting housing to limit the installation position of the connecting housing.

[0025] In one possible implementation, the inner circumferential wall of the connector pipe has a sealing layer that can press against the outer circumferential wall of the pipe when the pipe and the connector pipe are inserted and mated.

[0026] Taking the connection between the air intake component and the flow sensor as an example, the two ends of the pipe are connected to the air outlet of the air intake component and the air inlet of the flow sensor, respectively. Taking the connection position between the pipe and the air inlet of the flow sensor as an example, when connecting the pipe to the connector pipe at the air inlet of the flow sensor, the end of the pipe is inserted into the connector pipe. The diameter of the chamfer at the end of the pipe is smaller than the diameter of the area enclosed by the arc plate, so the end of the pipe can pass through the area enclosed by the arc plate. When the outer wall of the pipe contacts the arc plate, the arc plate slides outward radially. After the pipe is inserted into place, the arc plate is engaged with the annular groove on the pipe by the pushing action of the pushing component, which can axially limit the pipe and fix the pipe on the connector pipe.

[0027] This application provides a flow control device for microbial detection. Compared with the prior art, the above-mentioned configuration of this application allows the arc plate to be inserted into the annular groove of the pipe through the connector pipe at the air inlet of the flow sensor, thereby limiting the axial movement of the pipe and fixing the pipe to the air inlet of the flow sensor, which can improve the installation efficiency of the pipe and the air inlet of the flow sensor. Attached Figure Description

[0028] Figure 1 A schematic diagram of a flow control device for microbial detection provided in an embodiment of this application;

[0029] Figure 2 A cross-sectional schematic diagram of the pipe and connector pipe of a flow control device for microbial detection provided in an embodiment of this application;

[0030] Figure 3 for Figure 2 Enlarged diagram of section A in the middle;

[0031] Figure 4 A schematic diagram of the arc-shaped plate of a flow control device for microbial detection in a separated state, provided in an embodiment of this application;

[0032] Figure 5 for Figure 4Enlarged diagram of section B;

[0033] Figure 6 A schematic diagram of the connecting housing and arc-shaped plate portion of a flow control device for microbial detection provided in an embodiment of this application;

[0034] Figure 7 for Figure 6 Enlarged diagram of section C;

[0035] Figure 8 An exploded view of the connecting housing and arc-shaped plate portion of a flow control device for microbial detection provided in an embodiment of this application;

[0036] Figure 9 for Figure 8 Enlarged schematic diagram of section D in the middle.

[0037] Explanation of reference numerals in the attached drawings: 1. Pipe; 11. Annular groove; 2. Air inlet component; 21. Air inlet; 22. Pressure sensor; 3. Flow sensor; 4. Proportional flow valve; 41. Air outlet; 5. Connecting pipe; 51. Positioning step; 6. Connecting housing; 61. Limiting cavity; 62. Guide groove; 7. Arc plate; 8. Pushing component; 81. Push plate; 82. Elastic element; 83. Sleeve; 84. Limiting bolt; 85. Clearance groove; 86. Top plate. Detailed Implementation

[0038] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0039] Please refer to the following: Figures 1 to 9This application describes a flow control device for microbial detection. The flow control device for microbial detection includes an air inlet component 2, a flow sensor 3, and a proportional flow valve, which are sequentially connected via a pipe 1. Each of the air inlet component 2, flow sensor 3, and proportional flow valve 4 has a connector pipe 5. The connector pipe 5 has a connecting structure, each of which includes a connecting housing 6, several arc-shaped plates 7, and several pushing components 8. The connecting housing 6 is connected to the connector pipe 5. A limiting cavity 61 is provided between the connecting housing 6 and the connector pipe 5. The several arc-shaped plates 7 are all radially slidable along the connecting housing 6. Inside the limiting cavity 61; the outer peripheral wall of the pipe 1 connection end has an annular groove 11 that engages with the arc plate 7 to axially limit the pipe 1; the pipe 1 connection end has a chamfer, the diameter of the small end of the chamfer is smaller than the diameter of the area enclosed by the arc plates 7, so that the small end of the chamfer can be inserted into the area enclosed by the arc plates 7 without radially pushing the arc plates 7; a number of pushing components 8 correspond one-to-one with the arc plates 7; both ends of each pushing component 8 are connected to the arc plate 7 and the connecting housing 6, and the pushing direction of the pushing component 8 is along the radial direction of the arc plate 7.

[0040] This application provides a flow control device for microbial detection. Compared with the prior art, taking the connection position between pipe 1 and the air inlet of flow sensor 3 as an example, through the above-mentioned settings of this application, the connector pipe 5 at the air inlet position of pipe 1 and flow sensor 3 can be inserted and matched, so that the arc plate 7 and the annular groove 11 of pipe 1 can be inserted and matched, thereby limiting the axial position of pipe 1 and fixing pipe 1 to the air inlet of flow sensor 3, which can improve the installation efficiency of pipe 1 and air inlet of flow sensor 3.

[0041] It should be noted that the inner circumferential wall of the connector pipe 5 has a sealing layer. When the pipe 1 and the connector pipe 5 are inserted and mated, the sealing layer can press against the outer circumferential wall of the pipe 1. With the above arrangement, after the pipe 1 and the connector pipe 5 are inserted and mated, the arc plate 7 and the annular groove 11 can play an axial limiting role for the pipe 1. The sealing layer pressing against the outer circumferential wall of the pipe 1 can play a sealing role.

[0042] Therefore, after the pipe 1 is inserted into the connector pipe 5, the pipe 1 can not only be fixed to the connector pipe 5, but the pipe 1 can also be sealed with the connector pipe 5 through a sealing layer; the sealing layer can be a rubber layer.

[0043] The air intake component 2 has an air intake port 21, and the air intake component is also equipped with a pressure sensor 22 for detecting the pressure of the air intake port; the outlet of the proportional flow valve 4 is an air outlet 41, and the air outlet 41 is located at the location of the pressure sensor 22, so that the operator can judge the pressure difference between the air intake port 21 and the air outlet 41.

[0044] In some embodiments, such as Figures 1 to 9As shown, the arc-shaped plates 7 are evenly distributed around the connecting shell 6, and several arc-shaped plates 7 can be connected end to end to form a ring structure.

[0045] Taking six curved plates 7 as an example, the central angle corresponding to each curved plate 7 is 60 degrees, so the central angle corresponding to the six curved plates 7 is 360 degrees, which can form a ring structure.

[0046] When the six arc-shaped plates 7 form a ring structure, the six arc-shaped plates 7 are in a state of insertion and engagement with the annular groove 11, which plays an axial limiting role for the pipe 1; when the six arc-shaped plates 7 slide outward along the axis of their respective center positions, the six arc-shaped plates 7 can separate from the annular groove 11.

[0047] The arc plate 7 passes through the center of the circle along its central axis. Therefore, the axis of the arc plate 7 is along the radial direction of the connecting shell 6, and the arc plate 7 will not interfere with other arc plates 7 during its outward sliding process.

[0048] In some embodiments, such as Figures 1 to 9 As shown, the connecting housing 6 has a radially arranged guide groove 62 at the middle position of each arc plate 7. Each pushing component 8 includes a push plate 81 and an elastic element 82. The push plate 81 is connected to the arc plate 7 and slides in cooperation with the guide groove 62. The opposite sides of the push plate 81 contact the two sides of the guide groove 62 to limit the push plate 81 laterally. One end of the elastic element 82 is connected to the push plate 81 and the other end is connected to the guide groove 62. Under the elastic force of the elastic element 82, the arc plate 7 can be inserted into the annular groove 11 on the pipe 1.

[0049] By sliding the push plate 81 with the guide groove 62, the sliding direction of the arc plate 7 can be limited; by the contact between the opposite sides of the push plate 81 and the corresponding sidewalls of the guide groove 62, the push plate 81 can be laterally limited, reducing the occurrence of the arc plate 7 swinging around the push plate 81.

[0050] The elastic element 82 is a spring, which can provide a pushing force to the push plate 81, so that one side of the push plate 81 abuts against the end of the guide groove 62, thereby keeping the arc plate 7 in the plugged state, reducing the occurrence of the pipe 1 separating from the joint pipe 5 during normal use of the pipe 1.

[0051] In some embodiments, such as Figures 1 to 9 As shown, both the push plate 81 and the guide groove 62 have sleeves 83 at their ends. The elastic element 82 is a spring, and the two ends of the spring are located inside the sleeves 83 of the push plate 81 and the guide groove 62, respectively. The sleeve 83 has a threaded hole on its side wall, and a limit bolt 84 is connected to the sleeve 83. The inner end of the limit bolt 84 is located in the gap of the spring to axially limit the spring inside the sleeve 83.

[0052] By providing sleeves 83 at the ends of the push plate 81 and the guide groove 62, the two ends of the spring can be connected; the end of the guide groove 62 here refers to the end of the guide groove 62 away from the pipe 1. By providing a limiting bolt 84 on the sleeve 83 and placing the limiting bolt 84 inside the spring, the limiting bolt 84 can be locked onto the spring, thus limiting the spring and reducing the possibility of the spring separating from the sleeve 83.

[0053] In some embodiments, such as Figures 1 to 9 As shown, the push plate 81 has a clearance groove 85 on the side facing the pipe 1, and a top plate 86 is rotatably arranged in the clearance groove 85; wherein, when the arc plate 7 and the annular groove 11 are inserted and engaged, the top plate 86 is in a vertical position; when the arc plate 7 and the annular groove 11 are separated, the top plate 86 can be in a horizontal position and can abut against the end of the guide groove 62; the top plate 86 of the push plate 81 protrudes out of the guide groove 62, which makes it convenient for the operator to pull the push plate 81 outward.

[0054] The purpose of setting the top plate 86 on the push plate 81 is to keep the arc plate 7 separated from the annular groove 11, so as to facilitate the removal of the pipe 1 from the connector pipe 5. The following is a detailed explanation:

[0055] When it is necessary to disassemble pipe 1, the operator pulls the push plate 81 outward and separates the arc plate 7 from the annular groove 11. At this time, the top plate 86 in the vertical state is rotated to the horizontal state, and the bottom of the top plate 86 contacts the bottom of the clearance groove 85. Under the action of the spring force, the end of the top plate 86 can abut against the end of the guide groove 62, so that the arc plate 7 is kept separated from the annular groove 11, making it easy to remove pipe 1 from the connector pipe 5.

[0056] In some embodiments, such as Figures 1 to 9 As shown, when the top plate 86 is in a vertical state, the outer side of the top plate 86 is coplanar with the side wall of the push plate 81; the hinge axis of the top plate 86 is located below the top of the guide groove 62; wherein, when the arc plate 7 and the annular groove 11 are inserted and engaged, both the push plate 81 and the top plate 86 abut against the end of the guide groove 62.

[0057] With the above settings, when the push plate 81 abuts against the end of the guide groove 62, the top plate 86 also abuts against the end of the guide groove 62, thus reducing the free swaying of the top plate 86; since the hinge axis of the top plate 86 is located below the top plate 86 of the guide groove 62, after the push plate 81 abuts against the end of the guide groove 62, the top plate 86 cannot swing downward, thus keeping the top plate 86 in a vertical state.

[0058] In some embodiments, such as Figures 1 to 9As shown, the connecting housing 6 has an internal thread, and the connector tube 5 has an external thread. The connecting housing 6 and the connector tube 5 are threaded together. The outer peripheral wall of the connector tube 5 has a positioning step 51, which can contact the end of the connecting housing 6 to limit the installation position of the connecting housing 6.

[0059] The threaded connection between the connecting housing 6 and the connector tube 5 facilitates the assembly and disassembly of the connecting housing 6. The positioning step 51 on the outer peripheral wall of the connector tube 5 limits the installation position of the connecting housing 6. After the connecting housing 6 is connected to the connector tube 5, the top and bottom of the arc plate 7 contact the connecting housing 6 and the connector tube 5 respectively, and the connecting housing 6 and the connector tube 5 do not press against the arc plate 7 axially. Therefore, it does not affect the sliding of the arc plate 7 between the connecting housing 6 and the connector tube 5.

[0060] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A flow control device for microbial detection, characterized in that, This includes an intake component, a flow sensor, and a proportional flow valve connected sequentially by pipes; each of the intake component, flow sensor, and proportional flow valve has a connector pipe, and the connector pipe is equipped with a connection structure, each connection structure including: A connecting housing is connected to a connector tube; a limiting cavity is provided between the connecting housing and the connector tube; Several arc-shaped plates are slidably disposed within the limiting cavity along the radial direction of the connecting shell; the outer peripheral wall of the pipe connection end has an annular groove that engages with the arc-shaped plates to axially limit the pipe; the pipe connection end has a chamfer. Several pushing components are provided, each corresponding to one of the arc-shaped plates; both ends of each pushing component are connected to the arc-shaped plate and the connecting housing, and the pushing direction of the pushing component is along the radial direction of the arc-shaped plate.

2. The flow control device for microbial detection as described in claim 1, characterized in that, The arc-shaped plates are evenly distributed along the circumference of the connecting shell, and several of the arc-shaped plates can be connected end to end to form a ring structure.

3. The flow control device for microbial detection as described in claim 1, characterized in that, The connecting housing has a radially arranged guide groove at the center of each arc-shaped plate, and each of the pushing components includes: A push plate is connected to the arc-shaped plate and slides in conjunction with the guide groove; the opposite sides of the push plate contact the two sides of the guide groove to laterally limit the push plate. The elastic element is connected at one end to the push plate and at the other end to the guide groove; Under the elastic force of the elastic element, the arc-shaped plate can be inserted and fitted into the annular groove on the pipe.

4. The flow control device for microbial detection as described in claim 3, characterized in that, Both the push plate and the guide groove have sleeves at their ends, and the elastic element is a spring, with both ends of the spring located inside the sleeves of the push plate and the guide groove, respectively. The sleeve has a threaded hole on its side wall and a limit bolt is connected to the sleeve. The inner end of the limit bolt is located in the gap of the spring to axially limit the spring inside the sleeve.

5. A flow control device for microbial detection as described in claim 3, characterized in that, The push plate has a clearance groove on the side facing the pipe, and a top plate is rotatably installed in the clearance groove; When the arc-shaped plate is inserted into the annular groove, the top plate is in a vertical position; when the arc-shaped plate is separated from the annular groove, the top plate can be in a horizontal position and can abut against the end of the guide groove.

6. The flow control device for microbial detection as described in claim 5, characterized in that, When the top plate is in a vertical position, the outer side of the top plate is coplanar with the side wall of the push plate; the hinge axis of the top plate is located below the top of the guide groove; When the arc-shaped plate is inserted into the annular groove, both the push plate and the top plate abut against the end of the guide groove.

7. A flow control device for microbial detection as described in claim 3, characterized in that, The top plate of the pusher plate protrudes from the guide groove.

8. The flow control device for microbial detection as described in claim 1, characterized in that, The connecting housing has internal threads, and the connector pipe has external threads; the connecting housing and the connector pipe are threaded together.

9. A flow control device for microbial detection as described in claim 8, characterized in that, The outer peripheral wall of the connector tube has a positioning step, which can contact the end of the connecting housing to limit the installation position of the connecting housing.

10. A flow control device for microbial detection as described in claim 1, characterized in that, The inner circumferential wall of the connector pipe has a sealing layer, which can press tightly against the outer circumferential wall of the pipe when the pipe and the connector pipe are inserted and mated.

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