Quick-connect structure for pump suction module of gas detector

Abstract

This utility model discloses a quick-connect structure for a pump suction module in a gas detector, aiming to solve the problems of cumbersome connection operations, unstable sealing, and easy loosening in existing systems. The structure includes an external interface flange and a pump suction module flange for corresponding connections. A plug rod is fixed inside the external interface flange via a negative pressure plate. The pump suction module flange has an opening corresponding to the plug rod, and an adjusting component is installed within the opening via an adjusting groove. The adjusting component consists of a sliding base plate, a compression spring, and an "I"-shaped blocking component. A sealing ring is fitted onto the pump suction module flange. During connection, the plug rod is inserted into the opening and presses against the blocking component. After rotation, the locking plate engages with the gap between the limiting groove and the arc-shaped locking groove. After the pump suction module is activated, the negative pressure plate and the sealing ring form a double seal. This structure enables quick, manual connection, offers strong stability and good sealing, improves disassembly and testing efficiency, and has excellent adaptability.

Description

Technical Field

[0001] This utility model provides a quick-connect structure, and particularly relates to a quick-connect structure for a pump suction module of a gas detector. Background Technology

[0002] Gas detectors are instruments used to detect the concentration of various gases in the environment. The pump module, as its core component, can generate negative pressure to draw the gas to be detected into the internal sensing components of the detector to achieve accurate detection. The quick-connect structure between the pump module and the sampling port of the gas detector is directly related to the airtightness of gas transmission, the ease of connection, and the detection efficiency and accuracy.

[0003] In existing technologies, the connection between the pump module and the sampling port of a gas detector often uses bolt fastening or simple plug-in structures. While bolt fastening ensures a secure connection, it requires tools for assembly and disassembly, making the process cumbersome and time-consuming. In scenarios requiring frequent disassembly and assembly (such as multi-point on-site testing or equipment maintenance), this significantly reduces operational efficiency. Simple plug-in structures lack reliable limiting and sealing designs. After plugging in, they are prone to loosening due to external force or vibration, leading to gas leakage and affecting the accuracy of test results. Furthermore, poor sealing performance allows for the intrusion of outside air or leakage of the gas being tested, reducing detection accuracy and potentially posing safety hazards (such as when testing flammable and explosive gases). Additionally, it is difficult to achieve stable limiting and locking through the structure itself after connection, failing to balance convenience and reliability. Utility Model Content

[0004] To address the aforementioned issues, this application provides a quick-connect structure for a pump suction module in a gas detector. This solves the problems of cumbersome connection operations, low disassembly and assembly efficiency, unstable sealing performance, and easy loosening leading to decreased detection accuracy in the prior art, achieving fast and reliable connection and sealing.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a quick-connect structure for a pump suction module of a gas detector, including a corresponding external interface flange and a pump suction module end flange;

[0006] The interior of the external interface flange is fixedly connected to several insert rods via a negative pressure plate.

[0007] The end face of the pump suction module end flange near the external interface end flange is provided with openings corresponding to the positions of the insertion rods, and the interior of the openings is provided with adjusting components corresponding to the insertion rods through adjusting grooves;

[0008] The adjusting component includes a sliding base plate and a compression spring fixedly connected to the side of the sliding base plate near the opening; the other end of the compression spring is fixedly connected to an "I"-shaped blocking component.

[0009] Preferably, the inner diameter of the negative pressure plate is smaller than the inner diameter of the pump suction module end flange, and a sealing ring is fitted on the outside of the pump suction module flange. The sealing ring is located outside the opening of the external interface end flange and abuts against the external interface end flange.

[0010] The external interface flange is connected to the sampling port of the gas detector, and the pump module flange is connected to the pump module of the gas detector.

[0011] After the pump suction module is started, it applies negative pressure suction force to the negative pressure plate. The external interface flange, the pump suction module flange, and the sealing ring together form a sealing structure under the negative pressure suction force.

[0012] Preferably, the flange pipe body of the regulating groove pump suction module is centered and distributed in a circle, and one side of the regulating groove is provided with an arc-shaped groove that is connected to itself and is distributed in a circle, the arc-shaped groove restricting the rotational movement of the insertion rod.

[0013] Preferably, the adjustment groove includes a limiting groove corresponding to the arc-shaped slot, a sliding groove located on the other side of the limiting groove and connected to itself, and a movable groove located below the opening and connected to the limiting groove and the sliding groove;

[0014] The arc-shaped sliding groove corresponds to the sliding floor, compression spring, and blocking element, providing space for the adjusting element to slide.

[0015] Preferably, the blocking component includes a spring connecting plate fixedly connected to the compression spring, a locking plate corresponding to the insertion rod, and a connecting post located between the locking plate and the spring connecting plate, which serves as a connection and corresponds to the limiting groove.

[0016] Preferably: the diameter of the positioning plate is larger than that of the spring connecting plate; the width of the movable groove is larger than that of the positioning plate; a gap of the same thickness as the positioning plate is left between the limiting groove and the arc-shaped slot; a partition plate is provided between the adjustment grooves, and the partition plate is integrally connected to the layer where the arc-shaped slot is located.

[0017] One or more technical solutions provided in the embodiments of this application have at least the following technical effects or advantages compared with the prior art:

[0018] This invention involves inserting a rod into a locking plate during the connection process between the external interface flange and the pump module flange. As the insertion continues, the rod presses down on the locking plate and the spring within the movable groove. When the locking plate's horizontal plane is lower than the plane of the limiting groove, rotating the external interface flange causes the adjusting component to slide and rotate within the adjusting groove, allowing the locking plate to enter the sliding groove. At this point, the plate at the limiting groove level blocks the locking plate, preventing the spring from returning to its original position. Simultaneously, the rod passes through both the arc-shaped locking groove and the limiting groove, which limit the rod's rotation. Continuing rotation until the adjusting component contacts the partition plate ends the insertion process. The spring provides a squeezing force relative to the limiting groove on the locking plate, ensuring a stable connection between the external interface flange and the pump module flange. After the pump module is activated, under suction, the negative pressure plate presses tightly against the pump module flange port face. The gas to be detected passes through the center of the negative pressure plate and enters the gas detector. At this point, the external sealing ring further ensures a stable connection and a sealing effect.

[0019] Other advantages, objectives and features of this invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination or study, or may be taught from the practice of this invention. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the installation state of the quick-connect structure of the pump suction module for a gas detector according to this utility model;

[0021] Figure 2 This is a cross-sectional view of the external interface end of the quick-connect structure of the pump suction module for a gas detector according to this utility model;

[0022] Figure 3 This is an exploded view of the pump suction module end of the quick-connect structure of the pump suction module for a gas detector according to this utility model;

[0023] Figure 4 This is a cross-sectional view of the pump suction module end of the quick-connect structure of the pump suction module for a gas detector according to this utility model;

[0024] Figure 5 This is a partial enlarged view of part A of the quick-connect structure of the pump suction module for a gas detector according to this utility model.

[0025] As shown in the figure:

[0026] 1. External interface flange;

[0027] 11. Negative pressure plate; 12. Insert rod; 13. Sealing ring;

[0028] 2. Pump suction module end flange;

[0029] 21. Opening; 22. Adjustment groove; 23. Arc-shaped slot; 24. Limiting groove; 25. Sliding groove; 26. Movable groove; 27. Divider plate;

[0030] 3. Adjusting components;

[0031] 31. Sliding base plate; 32. Compression spring; 33. Blocking component; 34. Positioning plate; 35. Connecting column. Detailed Implementation

[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0033] It should be noted that the terms "vertical," "horizontal," "up," "down," "left," "right," and similar expressions used in this article are for illustrative purposes only and do not represent the only possible implementation.

[0034] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains; the terminology used herein in the description of this invention is for the purpose of describing particular embodiments only and is not intended to limit the invention; the term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0035] like Figure 1 and Figure 2As shown, the basic connection and sealing structure of the quick-connect structure of the pump suction module for the gas detector includes a corresponding external interface flange 1 and a pump suction module end flange 2. Several insert rods 12 are fixedly connected inside the external interface flange 1 via a negative pressure plate 11. The pump suction module end flange 2 has an opening 21 on its end face near the external interface flange 1, corresponding to the position of the insert rods 12. Inside the opening 21, an adjusting component 3 corresponding to the insert rods 12 is provided via an adjusting groove 22. The adjusting component 3 includes a sliding base plate 31 and a compression spring 32 fixedly connected to the side of the sliding base plate 31 near the opening 21. The compression spring 32 further... One end is fixedly connected to an "I"-shaped blocking component 33; the inner diameter of the negative pressure plate 11 is smaller than the inner diameter of the pump suction module end flange 2, and a sealing ring 13 is sleeved on the outside of the pump suction module flange 2. The sealing ring 13 is located outside the opening of the external interface end flange 1 and abuts against the external interface end flange 1. The external interface end flange 1 is connected to the sampling port of the gas detector, and the pump suction module end flange 2 is connected to the pump suction module of the gas detector. After the pump suction module is started, it gives the negative pressure plate 11 a negative pressure adsorption force. The external interface end flange 1, the pump suction module end flange 2 and the sealing ring 13 together form a sealing structure under the negative pressure adsorption force.

[0036] In this embodiment, the external interface flange 1 is connected to the pump suction module flange 2. The negative pressure plate 11 inside the external interface flange 1 is fixedly connected to several insert rods 12. The insert rods 12 correspond to the positions of the openings 21 on the end face of the pump suction module flange 2. In the opening 21, the adjusting member 3 is set through the adjusting groove 22. The compression spring 32 fixed on one side of the sliding base plate 31 is connected to the "I"-shaped blocking member 33 to form an elastically adjustable plug-in mating structure. The inner diameter of the negative pressure plate 11 is smaller than the inner diameter of the pump suction module flange 2. The sealing ring 13 sleeved on the outside of the pump suction module flange 2 is located outside the opening of the external interface flange 1 and abuts against it. The external interface flange 1 is connected to the sampling port, and the pump suction module flange 2 is connected to the pump suction module. The negative pressure adsorption force generated after the pump suction module is started makes the three form a sealed structure. In this implementation scheme, from the key points of implementation, the corresponding setting of the insertion rod 12 and the opening 21 achieves precise alignment. The elastic action of the compression spring 32 in the adjusting component 3, together with the blocking component 33, allows the insertion rod 12 to move axially through compression when inserted, which facilitates quick insertion. The double sealing design of the negative pressure plate 11 and the sealing ring 13, under the negative pressure generated by the pump suction module, enhances the tightness of the flanges at both ends through the adsorption force of the negative pressure plate 11, and forms a secondary seal on the outside through the sealing ring 13, effectively improving the overall sealing performance. From an innovative perspective, this structure combines the convenience of mechanical plug-in with the reliability of negative pressure sealing, solving the problems of cumbersome connection or insufficient sealing in existing structures: the cooperation between the plug rod 12 and the adjusting part 3 eliminates the need for tools, enabling quick connection by hand; the compression spring 32 provides continuous elastic pressure, ensuring that the connection is not easy to loosen after connection, thus improving stability; the synergistic effect of the negative pressure plate 11 and the sealing ring 13 not only uses negative pressure to enhance the tightness of the connection, but also avoids gas leakage through double sealing, ensuring detection accuracy. At the same time, the corresponding design of the external interface flange 1 and the pump suction module flange 2 adapts to different port connection requirements, improving the versatility and practicality of the device.

[0037] like Figure 3 , 4As shown in Figure 5, in the adjustment and limiting structure of this quick-connect structure, the adjustment groove 22 is circumferentially distributed with the axis of the pump suction module end flange 2 pipe body as the center. One side of the adjustment groove 22 is provided with an arc-shaped groove 23 that is connected to itself and is circumferentially distributed. The arc-shaped groove 23 restricts the rotational movement of the insertion rod 12. The adjustment groove 22 includes a limiting groove 24 corresponding to the arc-shaped groove 23, a sliding groove 25 located on the other side of the limiting groove 24 and connected to itself, and a movable groove 26 located below the opening 21 and connected to the limiting groove 24 and the sliding groove 25. The sliding groove 25 is an arc-shaped groove body and is connected to the sliding floor 31, the compression spring 32, and... The blocking member 33 provides space for the sliding of the adjusting member 3. The blocking member 33 includes a spring connecting plate fixedly connected to the compression spring 32, a locking plate 34 corresponding to and fitted with the insertion rod 12, and a connecting post 35 located between the locking plate 34 and the spring connecting plate and corresponding to the limiting groove 24. The diameter of the locking plate 34 is larger than that of the spring connecting plate, the width of the movable groove 26 is larger than that of the locking plate 34, and a gap with the same thickness as the locking plate 34 is left between the limiting groove 24 and the arc-shaped locking groove 23. A partition plate 27 is provided between the adjusting grooves 22, and the partition plate 27 is integrally connected to the layer where the arc-shaped locking groove 23 is located.

[0038] In this embodiment, the adjusting groove 22 is circumferentially distributed with the axis of the pump suction module end flange 2 pipe body as the center. One side of it is connected to the circumferentially distributed arc-shaped groove 23. The adjusting groove 22 consists of a limiting groove 24 corresponding to the arc-shaped groove 23, an arc-shaped sliding groove 25 located on the other side of the limiting groove 24 and connected thereto, and a movable groove 26 located below the opening 21 and connected to the limiting groove 24 and the sliding groove 25. The sliding groove 25 corresponds to the sliding base plate 31, the compression spring 32 and the blocking member 33 to provide... Sliding space; the spring connecting plate of the blocking member 33 is fixed to the compression spring 32, the locking plate 34 is correspondingly fitted with the insertion rod 12, the connecting column 35 connects the locking plate 34 and the spring connecting plate and corresponds to the limiting groove 24, the diameter of the locking plate 34 is larger than that of the spring connecting plate, the width of the movable groove 26 is larger than that of the locking plate 34, a gap of the same thickness as the locking plate 34 is left between the limiting groove 24 and the arc-shaped locking groove 23, and the partition plate 27 between the adjusting grooves 22 is integrally connected to the layer where the arc-shaped locking groove 23 is located. In this implementation scheme, from the perspective of key implementation points, the circumferentially distributed adjustment groove 22 and arc-shaped locking groove 23 construct a circumferential trajectory for the rotation and limiting of the insertion rod 12. The movable groove 26, because its width is adapted to the diameter of the locking plate 34, allows the blocking member 33 to move axially along the movable groove 26 when the insertion rod 12 squeezes the locking plate 34, and the elasticity of the compression spring 32 achieves flexible clearance. The gap between the limiting groove 24 and the arc-shaped locking groove 23 matches the thickness of the locking plate 34, allowing the locking plate 34 to be accurately locked between the two, completing reliable limiting and locking. The partition plate 27 limits the rotation range of the adjustment member 3, ensuring that multiple sets of adjustment members 3 are in place synchronously. In terms of innovation and beneficial effects, this structure organically combines axial elastic insertion and circumferential rotation limiting, solving the problems of insufficient connection stability or lack of limiting function in existing quick-connect structures: the cooperation between the movable groove 26 and the compression spring 32 allows the insertion rod 12 to be smoothly fed axially by squeezing the positioning plate 34 when inserted, without the need for complicated alignment operations, greatly improving the convenience of connection; during rotation, the positioning plate 34 moves along the sliding groove 25 and finally locks into the gap between the arc-shaped groove 23 and the limiting groove 24, achieving mechanical limiting by the shape of the structure itself, without the need for additional locking components, which simplifies the structure and enhances connection stability; the integrated design of the partition plate 27 ensures that the adjusting component 3 stops after rotating to the preset position, so that the external interface flange 1 and the pump suction module flange 2 are subjected to uniform force, avoiding local stress concentration that could damage the structure. At the same time, the corresponding cooperation of the positioning plate 34, the connecting column 35 and the limiting groove 24 firmly restricts the insertion rod 12 in the circumferential direction. Even under external forces such as vibration, the connection can be maintained by mechanical limiting, further improving the reliability and service life of the quick-connect structure.

[0039] In practical applications, this device must be used in conjunction with a gas detector. Its external interface flange must be connected to the gas detector's sampling port via conventional threads or snap-fit ​​connections. The pump module flange connects to the pump module's inlet. The miniature DC motor inside the pump module drives an impeller to generate negative pressure, providing the adsorption power. One end of the sampling tube must be fitted and fixed to the outside of the external interface flange. The end of the sampling tube is typically equipped with a dust filter or activated carbon filter to remove impurities and interfering substances from the gas being tested, preventing blockage of the negative pressure plate or affecting the accuracy of the detection sensor. The sealing ring can be made of nitrile rubber or fluororubber; both materials offer good oil resistance, sealing performance, and adaptability to the testing environment. To mitigate temperature fluctuations and slight chemical corrosion, the external interface flanges and pump module flanges are typically made of ABS engineering plastic or aluminum alloy. ABS engineering plastic is lightweight and easy to process, while aluminum alloy offers high strength and excellent heat dissipation. The insertion rod, sliding base plate, and blocking components can be made of polyoxymethylene plastic, which has outstanding wear resistance and reduces wear from long-term insertion and removal. The compression spring is usually made of piano wire to ensure a stable elastic coefficient and long service life. In addition, to monitor the connection sealing status, a miniature pressure sensor can be installed at the flange mating point. This sensor is electrically connected to the main control circuit board of the gas detector. When a poor seal leads to abnormal pressure, the detector's display screen will issue an alarm, allowing operators to check and adjust in a timely manner.

[0040] Specifically, in the actual implementation of this solution, preliminary assembly preparation is required first. The pump module is fixed to the side or internal cavity of the gas detector using the mounting bracket and fastening screws pre-installed on the detector body. Then, the power cable of the pump module is connected to the output terminal of the detector's power module, and the signal cable is connected to the signal interface of the detector's main control circuit board, completing the electrical integration of the pump module and the detector body. When assembling the quick-connect structure, first embed the sealing ring into the annular groove of the pump module's flange, pressing it along the edge with your finger to ensure it fits the groove completely without twisting. Then, align the sliding base plate of the adjusting component with the inlet of the adjusting groove and push it parallel to the bottom of the sliding groove. Gently push the blocking component to confirm that the pressure spring can extend and retract flexibly without jamming. When installing the sampling assembly, one end of the sampling tube is fitted onto the outer circumference of the external interface flange. A hose clamp is wrapped around the joint between the sampling tube and the flange and tightened with a screwdriver. The other end of the sampling tube is fitted with a filter head, pre-filled with a suitable filter medium. Before use, turn on the power switch of the gas detector. Access the system settings interface via the function buttons on the control panel, select the corresponding detection mode and pumping rate parameters. After setting the parameters, press the start button. The pumping module will then start, with its internal motor driving the impeller to generate negative pressure. Once the negative pressure value displayed on the detector screen stabilizes, place the filter head of the sampling tube in the area to be detected. The gas to be detected will pass through the filter head to remove impurities, then sequentially through the sampling tube, external interface flange, negative pressure plate center channel, and pumping module flange into the pumping module. The pumping module then delivers the gas to the gas sensor inside the detector. The sensor converts the gas concentration signal into an electrical signal, which is transmitted to the main control board, and finally, the detection value is displayed on the screen. To switch detection points, first pause the pumping module operation via the control panel. Hold the external interface flange and rotate it counterclockwise until the locking plate disengages from the limiting groove. Then, axially pull out the external interface flange and sampling tube assembly. Move to the new point, re-align the opening, insert the assembly, and rotate it clockwise until it contacts the partition plate. Restart the pumping module to continue detection. During regular maintenance, turn off the power to the detector and disconnect the power cable of the pump module. Remove the sampling tube and filter head, replace the filter medium in the filter head, and wipe the mating surfaces of the external interface flange and the pump module flange with a lint-free cloth soaked in isopropyl alcohol. Check the sealing ring for cracks or deformation; if damaged, replace it directly. At the same time, pull the lever to confirm that the adjusting parts slide smoothly. If necessary, apply a small amount of silicone-based grease to the sliding groove to reduce friction. After maintenance, reassemble according to the original steps to restore use. In addition, a calibration operation is required once a month. Connect the outlet of the standard gas cylinder to the external interface flange through the calibration adapter, open the standard gas cylinder valve, adjust the flow rate to the calibration requirement range, start the calibration program through the calibration function key of the detector, and after calibration is completed, close the cylinder valve and remove the adapter to ensure the accuracy of the test data.

[0041] Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make various modifications and alterations without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention should be determined by the claims.

Claims

1. A quick-connect structure for a pump suction module in a gas detector, comprising a corresponding external interface flange (1) and a pump suction module flange (2), characterized in that: The interior of the external interface flange (1) is fixedly connected to several plug rods (12) via a negative pressure plate (11). The pump suction module end flange (2) has an opening (21) on its end face near the external interface end flange (1) that corresponds to the position of the insertion rod (12). The opening (21) has an adjustment component (3) corresponding to the insertion rod (12) inside through the adjustment groove (22). The adjusting component (3) includes a sliding base plate (31) and a compression spring (32) fixedly connected to the side of the sliding base plate (31) near the opening (21); the other end of the compression spring (32) is fixedly connected to an "I"-shaped blocking component (33).

2. The quick-connect structure for the pump suction module of a gas detector according to claim 1, characterized in that: The inner diameter of the negative pressure plate (11) is smaller than the inner diameter of the pump suction module end flange (2). The pump suction module flange (2) is fitted with a sealing ring (13). The sealing ring (13) is located outside the opening of the external interface end flange (1) and abuts against the external interface end flange (1). The external interface flange (1) is connected to the sampling port of the gas detector, and the pump module flange (2) is connected to the pump module of the gas detector. After the pump suction module is started, it applies negative pressure suction force to the negative pressure plate (11). The external interface flange (1), the pump suction module flange (2), and the sealing ring (13) together form a sealing structure under the negative pressure suction force.

3. The quick-connect structure for the pump suction module of a gas detector according to claim 1, characterized in that, The regulating groove (22) has a pump suction module end flange (2) pipe body with the center of the circle and is distributed in a circle. One side of the regulating groove (22) is provided with an arc-shaped slot (23) that is connected to itself and is distributed in a circle. The arc-shaped slot (23) restricts the rotation of the insertion rod (12).

4. The quick-connect structure for the pump suction module of a gas detector according to claim 3, characterized in that, The adjustment groove (22) includes a limiting groove (24) corresponding to the arc-shaped slot (23), a sliding groove (25) located on the other side of the limiting groove (24) and connected to itself, and an active groove (26) located below the opening (21) and connected to the limiting groove (24) and the sliding groove (25). The sliding groove (25) is an arc-shaped groove that corresponds to the sliding base plate (31), the compression spring (32) and the blocking member (33), providing space for the adjustment member (3) to slide.

5. The quick-connect structure for the pump suction module of a gas detector according to claim 4, characterized in that, The blocking member (33) includes a spring connecting plate fixedly connected to the compression spring (32), a locking plate (34) corresponding to the insertion rod (12), and a connecting post (35) located between the locking plate (34) and the spring connecting plate and corresponding to the limiting groove (24).

6. The quick-connect structure for the pump suction module of a gas detector according to claim 5, characterized in that, The diameter of the positioning plate (34) is larger than that of the spring connecting plate; the width of the movable groove (26) is larger than that of the positioning plate (34); there is a gap between the limiting groove (24) and the arc-shaped groove (23) that is the same as the thickness of the positioning plate (34); each of the adjusting grooves (22) is provided with a partition plate (27), and the partition plate (27) is integrally connected with the layer where the arc-shaped groove (23) is located.

Images