A liquid suction prevention float ball device for a pump suction gas detector

Abstract

The utility model provides a kind of for pump suction type gas detector's anti-liquid suction float ball device, wherein, float body sampling device includes first float body and second float body. First float body is opened with first cavity, to float on liquid surface. Second float body is oppositely arranged with first float body, and second float body is fixed on the top of first float body with interval;Second float body is provided with gas passage through entire float along center axis direction, and one end of gas passage is used as gas sampling air inlet and is located at the connecting gap of second float body and first float body, and the other end of gas passage is used as air outlet, and is located at the top of second float body;Second float body is opened with second cavity, and second float body and air inlet are lifted off liquid surface by first float body. The anti-liquid suction float ball device for pump suction type gas detector provided by the utility model can improve the reliability and efficiency of gas detection, avoid inhaling liquid and reduce equipment maintenance cost.

Description

Technical Field

[0001] This utility model relates to the field of gas extraction and detection technology, and in particular to a float device for preventing liquid aspiration in a pump-type gas detector. Background Technology

[0002] Wastewater treatment plants often contain toxic, harmful, flammable, and explosive gases such as hydrogen sulfide and methane within confined spaces such as screen wells, booster pump pits, and treatment tanks. Pump-suction gas detectors, capable of remote sampling from outside these confined spaces, are crucial equipment for ensuring the safety of workers.

[0003] Currently, the common practice for remote suction sampling is to directly lower the air pump hose into a confined space for sampling, or simply attach a mesh cover or filter cotton to the end of the hose. However, due to the limited space, liquid level fluctuations, and operational constraints, the end of the hose is prone to accidentally drawing in sewage / leachate, leading to: filter clogging, increased suction resistance, and abnormal readings; corrosive media entering the pump / sensor, causing damage to core components and downtime; increased maintenance / replacement costs, affecting operational continuity, and creating safety hazards. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a float device for preventing liquid aspiration in a pump-type gas detector, so as to avoid gas aspiration during gas extraction and detection, thereby improving the accuracy and efficiency of gas detection and reducing equipment maintenance costs.

[0005] To solve the above-mentioned technical problems, the technical solution of this utility model is as follows:

[0006] A float device for preventing liquid aspiration in a pump-type gas detector, comprising:

[0007] A first float, wherein a first cavity is provided inside the first float to float on the liquid surface;

[0008] Multiple support columns are evenly distributed on one side of the first float in a ring arrangement, and one end of each support column is fixedly connected to one side of the first float; and

[0009] The second float is disposed opposite to the first float, and one side of the second float is fixedly connected to the other end of the plurality of support columns. The second float has a gas channel running through the entire float along its central axis. One end of the gas channel serves as a gas sampling inlet and is located at the connection gap between the second float and the first float. The other end of the gas channel serves as an outlet and is located at the top of the second float. The second float has a second cavity inside, through which the second float and the inlet are lifted off the liquid surface by the first float.

[0010] In one embodiment, the length of each of the plurality of support columns is 15mm-30mm.

[0011] In one embodiment, both the first float and the second float are hemispherical structures.

[0012] In one embodiment, the outer diameters of both the first float and the second float are 60mm to 100mm.

[0013] In one embodiment, a counterweight is provided at the bottom of the first float.

[0014] In one embodiment, the top of the second float is provided with an air guiding structure, one end of which covers the air outlet and communicates with the air outlet, and the other end of which is provided with a clamp or O-ring groove.

[0015] In one embodiment, the gas passage is provided with an anti-inhalation extension tube.

[0016] In one embodiment, the inner diameter of the anti-sucking extension tube is 4mm–8mm, and the length of the anti-sucking extension tube is 10mm–35mm.

[0017] In one embodiment, a support plate is provided inside the second cavity of the second float, and the side of the support plate is fixedly connected to the inner wall of the second cavity.

[0018] In one embodiment, both the first float and the second float are made of FDM thermoplastic material.

[0019] The above-described solution of this utility model can achieve at least the following beneficial effects:

[0020] 1. By setting up a first float and a second float, and by using the first float to support the second float, the air inlet on the second float is kept always above the liquid level, which avoids the accidental inhalation of liquid during sampling, thereby ensuring the accuracy and efficiency of the detection, while avoiding device damage caused by the accidental inhalation of liquid and reducing device maintenance costs.

[0021] 2. An anti-sucking extension tube is installed in the gas channel of the second float. The anti-sucking extension tube can prevent liquid from being sucked in from the geometric flow path, which further ensures the accuracy of gas detection and the safety of the device.

[0022] 3. By setting a counterweight at the bottom of the first float, the impact and roll-off resistance of the float sampling device is improved, ensuring the stability of the float sampling device on the liquid surface, so that the air inlet is always above the liquid surface, further improving the accuracy of gas detection. Attached Figure Description

[0023] To more clearly illustrate the embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0024] The structures, proportions, sizes, etc. illustrated in this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed herein, and are not intended to limit the implementation conditions of this utility model. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that this utility model can produce, should still fall within the scope of the technical content disclosed in this utility model.

[0025] Figure 1 This is a three-dimensional structural model of a float device for preventing liquid aspiration in a pump-suction gas detector provided by an embodiment of this utility model;

[0026] Figure 2 A three-dimensional structural schematic diagram of a liquid aspiration prevention float device for a pump-suction gas detector provided in an optional embodiment of the present invention;

[0027] Figure 3 This is a cross-sectional model diagram of an anti-liquid aspiration float device for a pump-suction gas detector provided in an optional embodiment of the present invention;

[0028] Figure 4 This is a cross-sectional schematic diagram of an anti-liquid aspiration float device for a pump-suction gas detector provided in an optional embodiment of the present invention;

[0029] Figure 5 A first buoy cross-sectional view provided for an optional embodiment of the present invention;

[0030] Figure 6 This is a cross-sectional view of the second float provided in an optional embodiment of the present invention;

[0031] Figure 7 This is a simulation diagram of the application scenario of the anti-liquid aspiration float device for a pump-suction gas detector provided in an optional embodiment of the present invention;

[0032] Figure 8 This is a schematic diagram illustrating the application scenario of the anti-liquid aspiration float device for a pump-suction gas detector provided in an optional embodiment of the present invention.

[0033] Figure 9A simulated diagram of a liquid-avoidance float device for a pump-suction gas detector, provided in an optional embodiment of the present invention, floating on the liquid surface;

[0034] Figure 10 This is a schematic diagram of a float device for preventing liquid aspiration in a pump-type gas detector, provided as an optional embodiment of the present invention, floating on the liquid surface.

[0035] Explanation of icon numbers:

[0036] 1. First float; 2. Second float; 21. Gas channel; 22. Air inlet; 3. Support column; 4. Air guiding structure; 5. Anti-sucking extension pipe; 6. Support plate; 7. Hose interface; 8. Liquid surface; 9. Air pump hose; 10. Float device.

[0037] In the various figures, the same or corresponding reference numerals indicate the same or corresponding parts. Detailed Implementation

[0038] Exemplary embodiments of the present invention will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present invention are shown in the drawings, it should be understood that the present invention may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this invention will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

[0039] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0040] It should be understood that the terms "comprising / including," "consisting of," or any other variations are intended to cover non-exclusive inclusion, such that a product, apparatus, process, or method that comprises a list of elements includes not only those elements but may also include, where necessary, other elements not expressly listed, or elements inherent to such a product, apparatus, process, or method. Without further limitation, an element defined by the phrases "comprising / including," "consisting of," does not exclude the presence of additional identical elements in the product, apparatus, process, or method that includes said element.

[0041] It should also be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device, component or structure referred to must have a specific orientation, be constructed or operated in a specific orientation, and should not be construed as a limitation on this utility model.

[0042] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0043] like Figures 1 to 6 As shown, an embodiment of this utility model proposes a liquid-preventing float device 10 for a pump-suction gas detector, which may include a first float 1, a second float 2, and multiple support columns 3. The first float 1 has a first cavity to float on the liquid surface. The second float 2 is positioned opposite the first float 1, and the multiple support columns 3 are evenly distributed between the first float 1 and the second float 2 in a ring arrangement; both ends of the multiple support columns 3 are fixedly connected to the two spaced sides of the first float 1 and the second float 2, respectively. The second float 2 has a gas channel 21 running through the entire float along its central axis. One end of the gas channel 21 serves as a gas sampling inlet 22 located at the connection gap between the second float 2 and the first float 1, and the other end serves as an outlet located at the top of the second float 2. The second float 2 has a second cavity, which lifts the second float 2 and the inlet 22 off the liquid surface via the first float 1.

[0044] In this embodiment, both the first float 1 and the second float 2 have cavities inside, allowing both to float on the liquid surface. The mass of the second float 2 can be less than the mass of the first float 1, ensuring that the first float 1 always supports the second float 2 on the liquid surface. The first float 1 and the second float 2 can be identical in shape and size, positioned opposite each other and spaced apart. The second cavity inside the second float 2 is larger than the first cavity inside the first float 1, ensuring that the mass of the first float 1 is greater than the mass of the second float 2. The gas channel is arranged parallel to the connection direction of the two, so that the air inlet 22 of the air inlet channel 21 is far from the liquid surface, preventing accidental inhalation of liquid during gas extraction and sampling, thus ensuring the accuracy of subsequent detection.

[0045] Multiple support columns 3 are arranged in a ring and evenly distributed between the first float 1 and the second float 2. The two ends of each support column 3 are fixedly connected to the side of the first float 1 and the side of the second float 2, respectively, to enhance the strength and stability of the overall structure. Preferably, the length of each support column 3 is 15mm-30mm to ensure that the air inlet does not contact the liquid surface even when there is disturbance, thus preventing liquid from being drawn in during gas extraction and detection.

[0046] Here, both the first float 1 and the second float 2 can be hemispherical structures. The two hemispherical structures are arranged opposite each other and spaced apart to form a complete, approximately spherical floating sampling device. Preferably, in order to ensure the impact resistance of the float, and considering the repeated washing of the float and the influence of its own weight, the wall thickness of the first float 1 and the second float 2 can be set to 1.5mm-3mm.

[0047] In an optional embodiment of this invention, the outer diameters of both the first float 1 and the second float 2 are 60mm to 100mm; preferably, their outer diameters can be set to 80mm. By setting the floats with hemispherical structures, the device is subjected to consistent forces in all directions on a turbulent liquid surface, thus avoiding damage to the structure.

[0048] In an optional embodiment of this utility model, a counterweight block may be provided at the bottom of the first float 1 to improve the impact resistance and rollover resistance of the first float 1, thereby ensuring the stability of the overall structure and ensuring that the first float 1 always floats on the liquid surface.

[0049] like Figure 3 and Figure 4 As shown, in an optional embodiment of this utility model, a gas guiding structure 4 is provided on the top of the second float 2. One end of the gas guiding structure 4 covers the outside of the gas outlet and communicates with the gas outlet, while the other end of the gas guiding structure 4 is provided with a clamp or O-ring groove. Here, the gas guiding structure 4 can be a gas guiding interface, with one end located at the top of the second float 2 and communicating with the gas outlet, to facilitate gas extraction and sampling. At the same time, under the negative pressure effect of gas extraction through the gas guiding structure 4, the second float 2 is always positioned on the first float 1, preventing the air inlet 22 from sucking in liquid.

[0050] Preferably, the gas guiding structure 4 can be integrally formed with the second float 2; the other end of the gas guiding structure 4 is provided with a hose interface 7, and the hose interface 7 can be equipped with an O-ring groove and a clamp to facilitate the connection of the gas detection device and achieve anti-pull-out, airtight and liquid-tight. Here, the hose interface 7 can be replaced by various specifications of interchangeable connectors such as quick-connect, threaded, and tapered interference fit.

[0051] In an optional embodiment of this utility model, an anti-aspiration extension tube 5 is provided in the gas channel; the anti-aspiration extension tube 5 further blocks the liquid from entering the sampling gas channel 21 in a straight line from a geometric path, further reducing the risk of accidental aspiration.

[0052] Preferably, the anti-sucking extension tube 5 can be configured as a sleeve structure, with the inner tube of the sleeve structure serving as a gas channel, and an annular buffer cavity formed between the outer tube and the inner tube. A lightweight float is installed inside the outer tube, which can float as the liquid level rises. Small holes are provided on the side wall of the outer tube, and the position of the small holes is higher than the safe height of the liquid surface from the end of the outer tube. When the liquid level rises unexpectedly, the liquid first enters the outer tube. A lightweight float inside the outer tube rises with the liquid level, sealing the inlet of the inner tube and blocking the liquid path. At the same time, because there are small holes on the side wall of the outer tube, when the liquid enters the outer tube, the small holes can introduce air to break the siphon effect, preventing the liquid from continuing to rise. More preferably, the upper section of the inner tube (the section away from the liquid surface) is a hydrophobic section, and the inner wall can be coated with a superhydrophobic material (such as fluorinated polymer), while the lower section of the inner tube (the section near the liquid surface) is a hydrophilic section, and the inner wall can be coated with a hydrophilic material (such as titanium dioxide). The hydrophobic section prevents droplets from adhering, while the hydrophilic section adsorbs accidentally entering droplets, causing them to flow back along the tube wall to avoid accumulation and further prevent accidental aspiration of liquid.

[0053] Preferably, a support plate 6 is provided in the second cavity of the second float 2. The side of the support plate 6 is fixedly connected to the inner wall of the second cavity, and the other side is fixedly connected to the outer wall of the anti-sucking extension tube 5 to support the anti-sucking extension tube 5. More preferably, the support plate 6 can be a honeycomb support plate to reduce the mass of the second float 2.

[0054] In one optional embodiment of this utility model, the inner diameter of the anti-sucking extension tube 5 is 4mm–8mm, and the length of the anti-sucking extension tube 5 is 10mm–35mm; more preferably, the length of the anti-sucking extension tube 5 is 15mm.

[0055] In an optional embodiment of this invention, both the first float 1 and the second float 2 are made of FDM thermoplastic material. Here, FDM thermoplastic material may include PETG (polyethylene terephthalate), ABS (acrylonitrile-butadiene-styrene copolymer), ASA (acrylonitrile-styrene-acrylate terpolymer), PA-CF (carbon fiber reinforced nylon), etc., to improve the overall structure's toughness and chemical resistance. Using the above materials, the first float 1 and the second float 2 can be printed using 3D printing technology. The 3D printing process is as follows:

[0056] Step 1, 3D modeling: Complete the integrated structural modeling of the first float 1, the second float 2, the gas channel 21, the anti-sucking extension tube 5, and the hose interface 7, and set the outer diameter, wall thickness, length of the anti-sucking extension tube 5, and length of the support column 3 of the first float 1 and the second float 2.

[0057] Step 2, Slicing parameter settings: layer height 0.2–0.3mm, fill 30–60%, outer wall line ≥4, flow rate / float overlap appropriate gain to improve compactness;

[0058] Step 3, Printing direction and parameter settings: Given the low shear strength in the Z-axis direction, the hose interface 7 should be oriented parallel to the Z-axis plane to enhance the strength of the hose interface 7; the gas channel 21 and the upper dome are set to "print line width 0.6mm, printing speed 10mm / s-30mm / s, printing sequence inside-outside-inside" to complete the printing through suspended printing, so as to ensure the printing quality and facilitate disassembly;

[0059] Step 4, Post-processing: After 3D printing, the parts are shaped by hot air, and epoxy solvent can be applied to key gaps for sealing.

[0060] Integrated 3D printing eliminates the need for molds, and allows for rapid iteration, excellent structural sealing, and configurable structural parameters. Furthermore, the cost of a single 3D printing unit is low, and the absence of mold investment reduces equipment maintenance and emergency procurement expenses. Additionally, parameters such as the float's outer diameter, wall thickness, anti-sucking extension pipe length, and support column length can be flexibly adjusted to suit complex working conditions such as bar screens and digesters, depending on different liquid levels / spaces.

[0061] It should be noted that the materials and preparation methods for the float device are not limited to FDM thermoplastic materials and 3D printing; it can also be prepared by integral molding or injection molding using SLA resin materials.

[0062] Since float devices are commonly used in wastewater, supernatant, and leachate containing suspended solids or organic matter, a corrosion-resistant coating can be applied to the surfaces of the first float 1 and the second float 2 to improve the anti-fouling performance of the float device and facilitate cleaning after sampling.

[0063] The anti-liquid aspiration float device provided in the above embodiments of this utility model is mainly used in pump-suction gas detectors. The float device 10 is connected to the pump-suction gas detector through the air pump hose 9. Here, the hose interface 7 on the second float 2 can be fixedly connected to the air pump hose 9 of the gas detection device and locked with a clamp; preferably, a small amount of silicone grease can be applied to the interface between the two to enhance the sealing and facilitate disassembly and assembly.

[0064] like Figures 7 to 10As shown, this pump-suction gas detector is mainly used for gas extraction and sampling from sewage, supernatant, and leachate containing suspended solids or organic matter. Its working environment typically involves high water flow impact in the screen well, surging / turbulent water within the pool, and confined spaces. In practical use: the float device is slowly lowered to the liquid surface in a confined space. Due to its structural design, the float device floats on the liquid surface and self-positions itself. The air pump is then turned on to extract air and initiate a test. After the gas sampling operation, the float device is rinsed and dried.

[0065] By using two hemispherical floats, a first float and a second float, with different masses, and a gas channel along the central axis of the second float, the second float is always supported by the first float and kept away from the liquid surface. This ensures that the gas sampling inlet is always above the liquid surface, preventing liquid from being drawn in during sampling and improving the accuracy of gas detection. It also avoids downtime and repairs of the gas detection device, reducing the risk of interruption and eliminating filter clogging and damage to the air pump or sensor from liquid ingress. This improves the reliability, safety, and efficiency of gas detection, while reducing manufacturing and maintenance costs to suit the complex conditions of wastewater treatment plants. Furthermore, by installing an anti-sucking extension tube within the gas channel, liquid entry into the gas channel is suppressed from the geometric flow path, further improving the accuracy of gas detection.

[0066] The above description is the preferred embodiment of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications should also be considered within the protection scope of this utility model.

Claims

1. A float device for preventing liquid aspiration in a pump-suction gas detector, characterized in that, include: The first float (1) has a first cavity inside it so as to float on the liquid surface; Multiple support columns (3) are evenly distributed on one side of the first float (1) and arranged in a ring. One end of each support column (3) is fixedly connected to one side of the first float (1). The second float (2) is arranged opposite to the first float (1), and one side of the second float (2) is fixedly connected to the other end of the multiple support columns (3); the second float (2) is provided with a gas channel (21) that runs through the entire float along the central axis direction. One end of the gas channel (21) serves as a gas sampling inlet (22) and is located at the connection gap between the second float (2) and the first float (1). The other end of the gas channel (21) serves as an outlet and is located at the top of the second float (2); a second cavity is opened inside the second float (2), and the second float (2) and the inlet (22) are lifted off the liquid surface by the first float (1).

2. The anti-liquid aspiration float device for a pump-suction gas detector according to claim 1, characterized in that, The lengths of the multiple support columns (3) are all 15mm-30mm.

3. The anti-liquid aspiration float device for a pump-suction gas detector according to claim 1, characterized in that, Both the first float (1) and the second float (2) are hemispherical structures.

4. The anti-liquid aspiration float device for a pump-suction gas detector according to claim 3, characterized in that, The outer diameters of the first float (1) and the second float (2) are both 60mm to 100mm.

5. The anti-liquid aspiration float device for a pump-suction gas detector according to claim 4, characterized in that, The first float (1) has a counterweight at its bottom.

6. The anti-liquid aspiration float device for a pump-suction gas detector according to claim 1, characterized in that, The second float is provided with an air guiding structure at the top. One end of the air guiding structure covers the air outlet and is connected to the air outlet. The other end of the air guiding structure is provided with a clamp or O-ring groove.

7. The anti-liquid aspiration float device for a pump-suction gas detector according to claim 1, characterized in that, An anti-inhalation extension tube (5) is provided in the gas channel.

8. The anti-liquid aspiration float device for a pump-suction gas detector according to claim 7, characterized in that, The anti-sucking extension tube (5) has an inner diameter of 4mm–8mm and a length of 10mm–35mm.

9. The anti-liquid aspiration float device for a pump-suction gas detector according to claim 7, characterized in that, A support plate (6) is provided in the second cavity of the second float (2), and the side of the support plate (6) is fixedly connected to the inner wall of the second cavity.

10. The anti-liquid aspiration float device for a pump-suction gas detector according to claim 1, characterized in that, The first float (1) and the second float (2) are both made of FDM thermoplastic material.

Images