Conductometric level switch and level monitoring system

Abstract

The utility model provides a kind of electric conductance liquid level switch and liquid level monitoring system, it is related to liquid level monitoring technical field, electric conductance liquid level switch includes shell, electrode assembly and nozzle assembly, electrode assembly and nozzle assembly are located in shell;Shell is equipped with first mounting hole, nozzle assembly includes nozzle fixed seat and nozzle body, nozzle body is worn in nozzle fixed seat, at least a portion of nozzle fixed seat is located in first mounting hole, nozzle fixed seat is connected with first mounting hole, nozzle fixed seat is used to limit nozzle body;At least a portion of nozzle body is located outside shell, the outer wall of nozzle body located outside shell is equipped with spray hole, spray hole is used to spray cleaning fluid to electrode assembly.The utility model's technical scheme, by setting nozzle fixed seat, nozzle body can be limited, the connecting mode between nozzle body and shell is more stable, reliable, and higher in connecting strength, it is favorable to ensure the sensitivity of electric conductance liquid level switch, improve service life.

Description

Technical Field

[0001] This utility model relates to the field of liquid level monitoring technology, and more specifically, to a conductivity liquid level switch and a liquid level monitoring system. Background Technology

[0002] Conductivity level switches are typically used to monitor the level of a conductive liquid within equipment. To ensure the sensitivity of the electrodes in a conductivity level switch, a nozzle needs to be installed and a cleaning solution sprayed onto the electrodes.

[0003] In related conductive level switches, the nozzle and housing are connected by adhesive bonding. Because the cleaning fluid has a certain pressure, prolonged operation can cause the adhesive joint to crack, thus affecting the service life of the conductive level switch. Utility Model Content

[0004] One objective of this invention is to provide a conductive liquid level switch. By setting a nozzle fixing seat, the connection between the nozzle body and the housing can be made more stable and reliable. In addition, before tightening the nozzle fixing seat, the nozzle body can be rotated first to align the nozzle orifice on the nozzle body with the electrode assembly, and then the nozzle fixing seat can be tightened. This helps to improve the cleaning effect and thus extend the service life of the conductive liquid level switch.

[0005] Another objective of this invention is to provide a liquid level monitoring system.

[0006] To achieve the above objectives, the first aspect of this utility model provides a conductive liquid level switch, including a housing, an electrode assembly, and a nozzle assembly. Both the electrode assembly and the nozzle assembly are disposed in the housing. The nozzle assembly is used to spray cleaning fluid onto the electrode assembly. The housing has a first mounting hole. The nozzle assembly includes a nozzle holder and a nozzle body. The nozzle body passes through the nozzle holder. At least a portion of the nozzle holder is disposed in the first mounting hole. The nozzle holder is connected to the first mounting hole and is used to limit the movement of the nozzle body. At least a portion of the nozzle body is disposed outside the housing. The outer wall of the nozzle body disposed outside the housing has a spray hole for spraying cleaning fluid onto the electrode assembly.

[0007] This invention aims to provide a conductive liquid level switch that limits the nozzle body by setting a nozzle fixing seat. With the nozzle fixing seat connected to the housing, the nozzle body is fixed in a preset position on the housing. Before tightening the nozzle fixing seat, the nozzle body can be rotated to align the spray orifice on the nozzle body with the electrode assembly, and then the nozzle fixing seat can be tightened. Compared to adhesive bonding, this design provides a more stable and reliable connection between the nozzle body and the housing, with higher connection strength and better cleaning effect. In actual operation, the nozzle assembly can accurately and stably spray cleaning fluid onto the electrode assembly through the spray orifice to remove dirt from the surface of the electrode assembly, ensuring the liquid level monitoring accuracy of the conductive liquid level switch, and also improving the service life of the conductive liquid level switch, meeting the requirements for long-term stable operation in industrial scenarios.

[0008] In some technical solutions, optionally, the first mounting hole includes a first hole segment and a second hole segment connected together, the radial dimension of the first hole segment is larger than the radial dimension of the second hole segment, and the connecting wall surface between the first hole segment and the second hole segment is a first stepped surface; the nozzle body passes through the first hole segment and the second hole segment, and the outer wall of the nozzle body is provided with a first limiting protrusion, one side of the first limiting protrusion is used to abut against the first stepped surface, and the other side of the first limiting protrusion is used to abut against the nozzle fixing seat.

[0009] In this technical solution, the nozzle body is positioned by the interaction between the first stepped surface and the nozzle mounting base, allowing the nozzle body to be installed on the housing. Furthermore, the first stepped surface serves as a positioning element, improving the installation accuracy of the nozzle body.

[0010] In some technical solutions, optionally, at least a portion of the nozzle fixing seat is disposed within the first hole section, one end of the nozzle fixing seat disposed within the first hole section is used to abut against the first limiting protrusion, and the nozzle fixing seat is threadedly connected to the first hole section.

[0011] In this technical solution, the first section of the first mounting hole has an internal thread on its wall. The outer wall of the nozzle holder has an external thread. The nozzle holder and the first section are threaded together by the external and internal threads. When assembling the nozzle holder and the nozzle body, after the nozzle body is inserted into the first mounting hole, the first limiting protrusion abuts against the first stepped surface for initial positioning. Then, the nozzle holder is screwed into the first section so that it presses against the first stepped surface, thereby achieving axial positioning of the nozzle holder on the nozzle body.

[0012] In some technical solutions, the first mounting hole may optionally include a third hole segment connected to the second hole segment. The second hole segment is located between the first hole segment and the third hole segment. The radial dimension of the third hole segment is smaller than that of the second hole segment. The connecting wall between the third hole segment and the second hole segment is a second stepped surface. The conductive liquid level switch also includes a first sealing ring located inside the second hole segment. The first sealing ring is located between the second stepped surface and the nozzle body.

[0013] In this technical solution, the first sealing ring abuts against the wall of the second orifice section, the second stepped surface, and the end face of the nozzle body. The first sealing ring serves to seal, preventing cleaning fluid from entering the gap between the nozzle body and the first mounting hole. The first sealing ring is positioned between the second stepped surface and the nozzle body. After the nozzle body is installed, the end face of the nozzle body and the second stepped surface compress the first sealing ring, causing it to deform and fill the gap between the end face of the nozzle body and the second stepped surface, thus improving the sealing effect.

[0014] In some technical solutions, the housing may optionally have a second mounting hole; the conductivity level switch may also include a cleaning fluid interface mounting base, at least a portion of which is disposed within the second mounting hole, and the cleaning fluid interface mounting base and the second mounting hole are detachably connected; the cleaning fluid interface mounting base is used to connect to the nozzle body to provide cleaning fluid to the nozzle body.

[0015] In this technical solution, the cleaning fluid interface mounting base and the second mounting hole are detachably connected, facilitating the disassembly and assembly of the cleaning fluid interface mounting base by operators, which is beneficial for maintenance or replacement. Furthermore, the cleaning fluid source is supplied to the nozzle body through the cleaning fluid interface mounting base, allowing the nozzle body to precisely and stably spray the cleaning fluid onto the electrode assembly through the spray orifice, thereby removing dirt from the surface of the electrode assembly.

[0016] In some technical solutions, optionally, the outer wall of the cleaning fluid interface mounting base is provided with a first mounting groove; the conductive liquid level switch also includes a second sealing ring, at least a portion of which is disposed in the first mounting groove, and the second sealing ring is used to abut against the wall of the second mounting hole.

[0017] In this technical solution, the second sealing ring abuts against the wall of the first mounting groove and the wall of the second mounting hole. The first sealing ring serves to seal, preventing cleaning fluid from entering the gap between the cleaning fluid inlet mounting base and the second mounting hole.

[0018] In some technical solutions, optionally, the housing is provided with a third mounting hole; the electrode assembly includes an electrode body and an electrode seat, the electrode body is disposed through the electrode seat, at least a portion of the electrode seat is disposed in the third mounting hole, the electrode seat and the third mounting hole are detachably connected, and the electrode seat is used to limit the electrode body.

[0019] In this technical solution, the electrode body can be positioned by setting an electrode holder. When the electrode holder is connected to the third mounting hole, the electrode body is fixed in a preset position on the housing. Furthermore, the electrode holder and the third mounting hole are detachably connected, facilitating the disassembly and assembly of the electrode holder and electrode body by operators, which is beneficial for maintenance or replacement.

[0020] In some technical solutions, optionally, the third mounting hole includes a fourth hole segment and a fifth hole segment connected together, the radial dimension of the fourth hole segment is larger than the radial dimension of the fifth hole segment, and the connecting wall surface between the fourth hole segment and the fifth hole segment is a third stepped surface; the electrode body passes through the fourth hole segment and the fifth hole segment, and the outer wall of the electrode body is provided with a second limiting protrusion, one side of the second limiting protrusion is used to abut against the third stepped surface, and the other side of the second limiting protrusion is used to abut against the electrode seat.

[0021] In this technical solution, the interaction between the third stepped surface and the electrode holder allows for the limiting of the electrode body, ensuring its installation on the housing. Furthermore, the third stepped surface serves as a positioning element, improving the installation accuracy of the electrode body.

[0022] In some technical solutions, the conductivity level switch may optionally include a cable connector and a cable. The cable connector is detachably connected to the housing. One end of the cable passes through the cable connector and extends into the housing. The cable is used for electrical connection with the electrode assembly.

[0023] In this technical solution, a cable connector is used to limit the movement of the cable. When the cable connector is connected to the housing, the cable is fixed in a preset position on the housing. The cable connector and housing are detachably connected, facilitating the installation and removal of the cable connector and cable by operators, which is beneficial for maintenance or replacement.

[0024] The second aspect of this utility model provides a liquid level monitoring system, comprising: a tank; and a conductivity-type liquid level switch as described in any of the above technical solutions, disposed within the tank. The liquid level monitoring system possesses the beneficial effects of any of the above technical solutions, which will not be elaborated further here.

[0025] Additional aspects and advantages of the present invention will become apparent in the following description or may be learned by practice of the present invention. Attached Figure Description

[0026] Figure 1 A front view of a conductivity level switch according to an embodiment of the present invention is shown;

[0027] Figure 2 A rear view of a conductivity level switch according to an embodiment of the present invention is shown;

[0028] Figure 3 A left view of a conductivity level switch according to an embodiment of the present invention is shown;

[0029] Figure 4 A right view of a conductivity level switch according to an embodiment of the present invention is shown;

[0030] Figure 5 A top view of a conductivity level switch according to an embodiment of the present invention is shown;

[0031] Figure 6 A bottom view of a conductivity level switch according to an embodiment of the present invention is shown;

[0032] Figure 7 A perspective view of a conductivity level switch according to an embodiment of the present invention is shown;

[0033] Figure 8 A perspective view of a conductivity level switch according to another embodiment of the present invention is shown;

[0034] Figure 9 A perspective view of a conductivity level switch according to another embodiment of the present invention is shown;

[0035] Figure 10 A cross-sectional view of a conductivity level switch according to an embodiment of the present invention is shown;

[0036] Figure 11 A cross-sectional view of a conductivity level switch according to another embodiment of the present invention is shown;

[0037] Figure 12 A schematic diagram of a liquid level monitoring system according to an embodiment of the present invention is shown;

[0038] Figure 13 A schematic diagram of a first mounting hole according to an embodiment of the present invention is shown;

[0039] Figure 14 A schematic diagram of a third mounting hole according to an embodiment of the present invention is shown.

[0040] The attached figures are labeled as follows:

[0041] 1: Conductive liquid level switch; 10: Housing; 102: First mounting hole; 1021: First hole segment; 1022: Second hole segment; 1023: First stepped surface; 1024: Third hole segment; 1025: Second stepped surface; 104: Second mounting hole; 106: Third mounting hole; 1061: Fourth hole segment; 1062: Fifth hole segment; 1063: Third stepped surface; 108: Threaded mounting hole; 11: Electrode assembly; 111: Electrode body; 1111: Second limiting protrusion; 112: Electrode seat; 12: Nozzle assembly; 121: Nozzle holder; 1211: First part; 1212: Second part; 122: Nozzle body; 1221: Nozzle orifice; 1222: First limiting protrusion; 13 1: First sealing ring; 132: Second sealing ring; 133: Third sealing ring; 134: Fourth sealing ring; 135: Fifth sealing ring; 14: Cleaning fluid interface mounting base; 141: First mounting groove; 151: First connector; 161: Cable connector; 162: Cable; 163: Cold-pressed terminal; 164: Limiting component; 2: Liquid level monitoring system; 21: Tank body; 22: First mounting bracket; 23: Electrode relay; 24: Second mounting bracket; 31: First liquid level position; 32: Second liquid level position; D1: Radial dimension of the first hole segment; D2: Radial dimension of the second hole segment; D3: Radial dimension of the third hole segment; D4: Radial dimension of the fourth hole segment; D5: Radial dimension of the fifth hole segment. Detailed Implementation

[0042] To better understand the above-mentioned objectives, features, and advantages of the embodiments of this utility model, the embodiments of this utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments of this utility model and the features thereof can be combined with each other.

[0043] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, embodiments of the present invention may be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below.

[0044] In the field of liquid level monitoring technology, conductivity-type liquid level switches are typically used to monitor the liquid level of a conductive liquid within equipment. Their core principle is to determine the liquid level (liquid surface position) based on the resistance difference between two electrodes. The detection sensitivity of the electrodes directly affects the accuracy of the liquid level monitoring results. Because the electrodes are in constant contact with the conductive liquid, dirt easily accumulates on their surfaces, affecting their detection sensitivity. Therefore, it is necessary to incorporate nozzles into conductivity-type liquid level switches to clean the electrodes by spraying cleaning fluid, thereby maintaining stable detection performance.

[0045] In related conductive level switches, the nozzle and housing are fixedly connected by adhesive bonding. However, the cleaning fluid has a certain working pressure during spraying, and the pressure fluctuates under actual operating conditions. Long-term operation of the conductive level switch may lead to cracking at the adhesive joint between the nozzle and housing. This can cause cleaning fluid leakage, affecting the cleaning effect of the nozzle on the electrode and the accuracy of level monitoring, and also shortening the service life of the conductive level switch, failing to meet the requirements for long-term stable operation of conductive level switches in industrial scenarios.

[0046] This invention aims to provide a conductive liquid level switch and a liquid level monitoring system. By setting a nozzle fixing seat, the nozzle body can be limited in position. When the nozzle fixing seat is connected to the housing, the nozzle body is fixed in a preset position on the housing. Before tightening the nozzle fixing seat, the nozzle body can be rotated to align the spray orifice on the nozzle body with the electrode assembly, and then the nozzle fixing seat can be tightened. Compared with adhesive bonding, this design provides a more stable and reliable connection between the nozzle body and the housing, with higher connection strength and better cleaning effect. In actual working conditions, the nozzle assembly can accurately and stably spray cleaning fluid onto the electrode assembly through the spray orifice to remove dirt from the surface of the electrode assembly, ensuring the liquid level monitoring accuracy of the conductive liquid level switch, and also improving the service life of the conductive liquid level switch, meeting the requirements for long-term stable operation in industrial scenarios.

[0047] It should be noted that, typically, a conductivity-type level switch includes two electrode assemblies, each comprising an electrode body. One electrode body is the positive electrode, and the other is the negative electrode. A resistor is installed between the two electrode bodies. The resistance value differs depending on whether the conductive liquid being measured passes through the resistor or not. The conductivity-type level switch determines the liquid level position by measuring this resistance difference, outputs a switching signal, and uploads this signal to a host computer.

[0048] The conductive liquid being tested refers to a liquid containing electrolytes (ions) that can form a current path. Cleaning solution refers to a liquid used to clean dirt from the surface of electrode components, such as industrial pure water or cleaning solvents.

[0049] The following reference Figures 1 to 14 This invention describes a conductivity-type liquid level switch and a liquid level monitoring system provided according to some embodiments of the present invention.

[0050] In one embodiment of this utility model, such as Figure 1 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9 , Figure 10 and Figure 11 As shown, the conductive liquid level switch 1 includes a housing 10, an electrode assembly 11, and a nozzle assembly 12. Both the electrode assembly 11 and the nozzle assembly 12 are disposed in the housing 10, and the nozzle assembly 12 is used to spray cleaning fluid onto the electrode assembly 11.

[0051] The housing 10 is provided with a first mounting hole 102. The nozzle assembly 12 includes a nozzle holder 121 and a nozzle body 122. The nozzle body 122 passes through the nozzle holder 121, and at least a portion of the nozzle holder 121 is disposed in the first mounting hole 102. The nozzle holder 121 is connected to the first mounting hole 102 and is used to limit the nozzle body 122.

[0052] At least a portion of the nozzle body 122 is disposed outside the housing 10. The outer wall of the nozzle body 122 disposed outside the housing 10 is provided with a spray hole 1221, which is used to spray cleaning fluid onto the electrode assembly 11.

[0053] Conductivity-type liquid level switches 1 are typically used to monitor the level of a conductive liquid within equipment. The working principle of the conductivity-type liquid level switch 1 is to determine the liquid level (liquid surface position) based on the difference in resistance between the electrode components 11. The conductive liquid being measured refers to a liquid containing electrolytes (ions) that can form a current path.

[0054] With the nozzle holder 121 connected to the housing 10, the nozzle body 122 is fixed in a preset position on the housing 10, and the spray hole 1221 on the nozzle body 122 can be aligned with the electrode assembly 11, so that the nozzle assembly 12 sprays cleaning fluid onto the electrode assembly 11 through the spray hole 1221, thereby removing dirt from the surface of the electrode assembly 11. The cleaning fluid refers to a liquid used to clean dirt from the surface of the electrode assembly 11, such as industrial pure water or cleaning solvent.

[0055] This invention aims to provide a conductive liquid level switch 1, which limits the nozzle body 122 by setting a nozzle fixing seat 121. When the nozzle fixing seat 121 is connected to the housing 10, the nozzle body 122 is fixed in a preset position on the housing 10. Before tightening the nozzle fixing seat 121, the nozzle body 122 can be rotated to align the spray hole 1221 on the nozzle body 122 with the electrode assembly 11, and then the nozzle fixing seat 121 can be tightened. Compared with the adhesive method, this design provides a more stable and reliable connection between the nozzle body 122 and the housing 10, with higher connection strength and better cleaning effect. In actual working conditions, the nozzle assembly 12 can accurately and stably spray cleaning fluid onto the electrode assembly 11 through the spray hole 1221 to remove dirt from the surface of the electrode assembly 11, ensuring the liquid level monitoring accuracy of the conductive liquid level switch 1, and also improving the service life of the conductive liquid level switch 1, meeting the requirements for long-term stable operation in industrial scenarios.

[0056] In some embodiments, optionally, the number of electrode assemblies 11 is two. Each electrode assembly 11 includes an electrode body 111. Of the two electrode bodies 111, one electrode body 111 is a positive electrode, and the other electrode body 111 is a negative electrode. A resistor is provided between the two electrode bodies 111, and the resistance value differs depending on whether the conductive liquid being measured passes through the resistor or not. The conductivity-type liquid level switch 1 determines the liquid level position of the conductive liquid being measured based on the difference in resistance value, outputs a switching signal, and uploads the switching signal to a host computer.

[0057] In some embodiments, optionally, at least a portion of the nozzle body 122 is disposed outside the housing 10, and at least a portion of the nozzle body 122 is disposed inside the housing 10. One end of the nozzle body 122 disposed inside the housing 10 is used to connect to the cleaning fluid interface mounting seat 14. The cleaning fluid interface mounting seat 14 is used to connect to a cleaning pipe, and the cleaning pipe is used to connect to a source of cleaning fluid.

[0058] In some embodiments, the nozzle holder 121 is optionally detachably connected to the first mounting hole 102. This facilitates disassembly and assembly by personnel, and is beneficial for maintenance or replacement.

[0059] In some embodiments, optionally, such as Figure 11 and Figure 13 As shown, the first mounting hole 102 includes a first hole segment 1021 and a second hole segment 1022 connected together. The radial dimension D1 of the first hole segment 1021 is greater than the radial dimension D2 of the second hole segment 1022, and the connecting wall between the first hole segment 1021 and the second hole segment 1022 is a first stepped surface 1023.

[0060] The nozzle body 122 passes through the first hole section 1021 and the second hole section 1022. The outer wall of the nozzle body 122 is provided with a first limiting protrusion 1222. One side of the first limiting protrusion 1222 is used to abut against the first step surface 1023, and the other side of the first limiting protrusion 1222 is used to abut against the nozzle fixing seat 121.

[0061] The first mounting hole 102 has a stepped structure, and the first stepped surface 1023 of the stepped structure is the connecting wall between the first hole segment 1021 and the second hole segment 1022. In the first hole segment 1021 and the second hole segment 1022, the first hole segment 1021 is closer to the opening of the first mounting hole 102.

[0062] When the nozzle holder 121 is connected to the first mounting hole 102, one side of the first limiting protrusion 1222 abuts against the first stepped surface 1023, and the other side abuts against the end face of the nozzle holder 121.

[0063] The first stepped surface 1023, in cooperation with the nozzle mounting base 121, can limit the nozzle body 122, allowing it to be mounted on the housing 10 (the nozzle body 122 and the housing 10 are relatively fixed). Furthermore, the first stepped surface 1023 serves as a positioning element, improving the installation accuracy of the nozzle body 122. In actual operation, the nozzle body 122 can precisely and stably spray cleaning fluid onto the electrode assembly 11 through the spray hole 1221 to remove dirt from the surface of the electrode assembly 11.

[0064] Optionally, after the nozzle body 122 is installed, the nozzle hole 1221 provided on the nozzle body 122 can be directly aligned with the electrode body 111 of the electrode assembly 11.

[0065] In some embodiments, the nozzle body 122 is optionally provided with a plurality of nozzle holes 1221 arranged in the axial direction, and cleaning fluid can be sprayed out from the plurality of nozzle holes 1221 to rinse (clean) the electrode assembly 11.

[0066] In some embodiments, the first mounting hole 102 is optionally a threaded hole. The nozzle holder 121 is threadedly connected to the first mounting hole 102. This design facilitates the disassembly and assembly of the nozzle holder 121 and the nozzle body 122 by operators, which is beneficial for maintenance or replacement.

[0067] Optionally, after the nozzle holder 121 is tightened, the gap between the nozzle holder 121 and the first mounting hole 102 is filled with an adhesive (such as threadlocker) to prevent the nozzle holder 121 from loosening. The nozzle holder 121 has a through hole for the nozzle body 122 to pass through. When the nozzle holder 121 is tightened, the nozzle body 122 is fixed in the axial direction.

[0068] In some embodiments, optionally, such as Figure 11 As shown, at least a portion of the nozzle fixing seat 121 is disposed within the first hole section 1021. One end of the nozzle fixing seat 121 disposed within the first hole section 1021 is used to abut against the first limiting protrusion 1222. The nozzle fixing seat 121 is threadedly connected to the first hole section 1021.

[0069] The first hole section 1021 of the first mounting hole 102 has an internal thread on its hole wall. The nozzle holder 121 has an external thread on its outer wall. The nozzle holder 121 and the first hole section 1021 are threaded together by the external and internal threads.

[0070] At least a portion of the nozzle holder 121 can extend into the first hole section 1021, and one end of the nozzle holder 121 extending into the first hole section 1021 abuts against the side of the first limiting protrusion 1222 away from the first step surface 1023.

[0071] The other end of the nozzle holder 121 can protrude outside the port of the first orifice 1021, or be flush with the port.

[0072] When assembling the nozzle holder 121 and the nozzle body 122, after the nozzle body 122 passes through the first mounting hole 102, the first limiting protrusion 1222 abuts against the first stepped surface 1023 for initial positioning. Then, the nozzle holder 121 is screwed into the first hole section 1021 so that the nozzle holder 121 presses against the first stepped surface 1023, thereby achieving axial positioning of the nozzle holder 121 on the nozzle body 122.

[0073] In some embodiments, optionally, such as Figure 11 As shown, the nozzle holder 121 includes a first part 1211 and a second part 1212 connected together. Both the first part 1211 and the second part 1212 are cylindrical, with the radial dimension of the first part 1211 being larger than that of the second part 1212. The first part 1211 is located outside the first mounting hole 102, and the second part 1212 is located inside the first hole section 1021, and the second part 1212 is threadedly connected to the first hole section 1021.

[0074] In some embodiments, optionally, such as Figure 11 and Figure 13 As shown, the first mounting hole 102 also includes a third hole segment 1024, which is connected to the second hole segment 1022. The second hole segment 1022 is located between the first hole segment 1021 and the third hole segment 1024. The radial dimension D3 of the third hole segment 1024 is smaller than the radial dimension D2 of the second hole segment 1022, and the connecting wall between the third hole segment 1024 and the second hole segment 1022 is a second stepped surface 1025.

[0075] like Figure 11 As shown, the conductive liquid level switch 1 also includes a first sealing ring 131, which is disposed in the second orifice section 1022 and between the second step surface 1025 and the nozzle body 122.

[0076] The first mounting hole 102 has a stepped structure. The first stepped surface 1023 of the stepped structure serves as the connecting wall between the first hole segment 1021 and the second hole segment 1022, and the second stepped surface 1025 of the stepped structure serves as the connecting wall between the third hole segment 1024 and the second hole segment 1022. Among the first hole segment 1021, the second hole segment 1022, and the third hole segment 1024, the first hole segment 1021 is closer to the opening of the first mounting hole 102.

[0077] The first sealing ring 131 abuts against the wall of the second orifice 1022, the second stepped surface 1025, and the end face of the nozzle body 122. The first sealing ring 131 serves to seal, preventing cleaning fluid from entering the gap between the nozzle body 122 and the first mounting hole 102. The first sealing ring 131 is located between the second stepped surface 1025 and the nozzle body 122. After the nozzle body 122 is installed, the end face of the nozzle body 122 and the second stepped surface 1025 compress the first sealing ring 131, causing it to deform and fill the gap between the end face of the nozzle body 122 and the second stepped surface 1025, thus improving the sealing effect.

[0078] In one specific embodiment, the first sealing ring 131 is an O-ring.

[0079] In some embodiments, optionally, such as Figure 4 , Figure 7 , Figure 8 and Figure 11 As shown, the housing 10 is provided with a second mounting hole 104. The conductive liquid level switch 1 also includes a cleaning fluid interface mounting base 14, at least a portion of which is disposed within the second mounting hole 104, and the cleaning fluid interface mounting base 14 and the second mounting hole 104 are detachably connected.

[0080] The cleaning fluid inlet mounting bracket 14 is used to connect to the nozzle body 122 to provide cleaning fluid to the nozzle body 122.

[0081] The cleaning fluid interface mounting base 14 and the second mounting hole 104 are detachably connected, which makes it convenient for staff to disassemble and assemble the cleaning fluid interface mounting base 14, and facilitates maintenance or replacement.

[0082] Optionally, the second mounting hole 104 is a stepped hole (stepped structure). The stepped surface of the stepped hole abuts against the end face of the cleaning fluid interface mounting base 14. By providing the stepped surface, the cleaning fluid interface mounting base 14 can be positioned and installed.

[0083] The cleaning fluid interface mounting base 14 is used to connect the cleaning fluid source so that the source can supply cleaning fluid to the nozzle body 122 through the cleaning fluid interface mounting base 14. The nozzle body 122 can accurately and stably spray the cleaning fluid onto the electrode assembly 11 through the spray hole 1221 to remove dirt from the surface of the electrode assembly 11.

[0084] In some embodiments, the conductive level switch 1 may optionally include a first connector 151. After at least a portion of the cleaning fluid interface mounting base 14 is disposed within the second mounting hole 104, the first connector 151 passes through the cleaning fluid interface mounting base 14 and the housing 10 to achieve a detachable connection between the cleaning fluid interface mounting base 14 and the housing 10.

[0085] It should be noted that the number of first connectors 151 is at least one, that is, there can be one, two or more first connectors 151, and the first connectors 151 can be flexibly set according to actual needs.

[0086] In one specific embodiment, the number of first connectors 151 is four.

[0087] In one specific embodiment, the first connector 151 is a fixing screw. By rotating the fixing screw, the fixing screw can be installed and removed, thereby installing and removing the cleaning fluid interface mounting base 14.

[0088] In some embodiments, the cleaning fluid inlet mounting base 14 is optionally used to connect a cleaning pipe, which is used to connect to a source of cleaning fluid. The cleaning fluid inlet mounting base 14 has a through hole with internal threads on its wall. The cleaning pipe passes through the through hole of the cleaning fluid inlet mounting base 14. The outer wall of the cleaning pipe has external threads.

[0089] The through hole of the cleaning pipe and cleaning fluid interface mounting base 14 is threaded through external and internal threads.

[0090] It should be noted that the flow path of the cleaning fluid is the cleaning pipe, the cleaning fluid interface mounting base 14, the nozzle body 122, and the spray hole 1221. The flow path of the cleaning fluid is not connected to the hole or groove structure through which the cable (cable 162) passes.

[0091] In some embodiments, optionally, such as Figure 11As shown, the outer wall of the cleaning fluid interface mounting base 14 is provided with a first mounting groove 141. The conductive liquid level switch 1 also includes a second sealing ring 132, at least a portion of which is disposed in the first mounting groove 141. The second sealing ring 132 is used to abut against the wall of the second mounting hole 104.

[0092] By providing the first mounting groove 141, installation space can be provided for the second sealing ring 132.

[0093] The second sealing ring 132 abuts against the wall of the first mounting groove 141 and the wall of the second mounting hole 104. The second sealing ring 132 serves to seal, preventing cleaning fluid from entering the gap between the cleaning fluid inlet mounting seat 14 and the second mounting hole 104.

[0094] In one specific embodiment, the second sealing ring 132 may optionally be an O-ring.

[0095] In some embodiments, optionally, such as Figure 10 As shown, the housing 10 has a third mounting hole 106. The electrode assembly 11 includes an electrode body 111 and an electrode seat 112. The electrode body 111 passes through the electrode seat 112, and at least a portion of the electrode seat 112 is disposed within the third mounting hole 106. The electrode seat 112 and the third mounting hole 106 are detachably connected, and the electrode seat 112 is used to limit the electrode body 111.

[0096] By setting the electrode holder 112, the electrode body 111 can be limited. When the electrode holder 112 is connected to the third mounting hole 106, the electrode body 111 is fixed in a preset position in the housing 10. The nozzle body 122 can accurately and stably spray cleaning fluid onto the electrode assembly 11 through the spray hole 1221 to remove dirt from the surface of the electrode assembly 11.

[0097] The electrode holder 112 and the third mounting hole 106 are detachably connected, which makes it convenient for staff to disassemble and assemble the electrode holder 112 and the electrode body 111, which is beneficial for maintenance or replacement.

[0098] In some embodiments, optionally, the number of electrode assemblies 11 is two. Each electrode assembly 11 includes an electrode body 111. Of the two electrode bodies 111, one electrode body 111 is a positive electrode and the other electrode body 111 is a negative electrode. A resistor is provided between the two electrode bodies 111.

[0099] In some embodiments, optionally, there are two nozzle assemblies 12. The nozzle body 122 of one nozzle assembly 12 is capable of spraying cleaning fluid onto one electrode body 111. The nozzle body 122 of the other nozzle assembly 12 is capable of spraying cleaning fluid onto another electrode body 111.

[0100] In some embodiments, optionally, such as Figure 10 and Figure 14 As shown, the third mounting hole 106 includes a fourth hole segment 1061 and a fifth hole segment 1062 that are connected. The radial dimension D4 of the fourth hole segment 1061 is greater than the radial dimension D5 of the fifth hole segment 1062. The connecting wall between the fourth hole segment 1061 and the fifth hole segment 1062 is a third stepped surface 1063.

[0101] The electrode body 111 passes through the fourth hole section 1061 and the fifth hole section 1062. The outer wall of the electrode body 111 is provided with a second limiting protrusion 1111. One side of the second limiting protrusion 1111 is used to abut against the third step surface 1063, and the other side of the second limiting protrusion 1111 is used to abut against the electrode seat 112.

[0102] The third mounting hole 106 has a stepped structure, and the third step surface 1063 of the stepped structure serves as the connecting wall between the fourth hole segment 1061 and the fifth hole segment 1062. Among the fourth hole segment 1061 and the fifth hole segment 1062, the fourth hole segment 1061 is closer to the opening of the third mounting hole 106.

[0103] When the electrode seat 112 and the third mounting hole 106 are connected, one side of the second limiting protrusion 1111 abuts against the third step surface 1063, and the other side abuts against the electrode seat 112.

[0104] The interaction between the third stepped surface 1063 and the electrode holder 112 limits the electrode body 111, allowing it to be mounted on the housing 10 (with the electrode body 111 and housing 10 relatively fixed). Furthermore, the third stepped surface 1063 serves as a positioning element, improving the installation accuracy of the electrode body 111. In actual operation, the nozzle body 122 precisely and stably sprays cleaning fluid onto the electrode body 111 through the spray hole 1221 to remove dirt from its surface.

[0105] In one specific embodiment, the third mounting hole 106 is a threaded hole. The electrode holder 112 is threadedly connected to the third mounting hole 106. This design facilitates the disassembly and assembly of the electrode holder 112 and the electrode body 111 by operators, which is beneficial for maintenance or replacement.

[0106] After the electrode holder 112 is tightened, the electrode body 111 is fixed in the axial direction, and a sealed connection is achieved.

[0107] In some embodiments, a third sealing ring 133 may be provided between the electrode body 111 and the electrode seat 112. By providing the third sealing ring 133, the sealing performance between the electrode body 111 and the electrode seat 112 in the connected state can be improved.

[0108] Optionally, the electrode holder 112 is provided with a through hole, and the electrode body 111 passes through the through hole of the electrode holder 112. The electrode body 111 and the electrode holder 112 are sealed together by a third sealing ring 133.

[0109] In one specific embodiment, the third sealing ring 133 is an O-ring.

[0110] In some embodiments, a fourth sealing ring 134 may be provided between the electrode holder 112 and the housing 10. By providing the fourth sealing ring 134, the sealing performance between the electrode holder 112 and the housing 10 in the connected state can be improved.

[0111] In one specific embodiment, the fourth sealing ring 134 is an O-ring.

[0112] In some embodiments, optionally, such as Figure 1 , Figure 3 , Figure 4 , Figure 7 , Figure 8 , Figure 9 and Figure 10 As shown, the conductive level switch 1 also includes a cable connector 161 and a cable 162. The cable connector 161 is detachably connected to the housing 10, and one end of the cable 162 passes through the cable connector 161 and extends into the housing 10. The cable 162 is used for electrical connection with the electrode assembly 11.

[0113] By setting the cable connector 161, the cable 162 can be limited. When the cable connector 161 is connected to the housing 10, the cable 162 is fixed in a preset position on the housing 10. The cable connector 161 and the housing 10 are detachably connected, which facilitates the disassembly and assembly of the cable connector 161 and the cable 162 by the staff, and is beneficial for maintenance or replacement.

[0114] In some embodiments, the housing 10 may optionally have a fourth mounting hole. At least a portion of the cable connector 161 is disposed within the fourth mounting hole, and the cable connector 161 is threadedly connected to the fourth mounting hole.

[0115] In some embodiments, a fifth sealing ring 135 may be provided between the cable connector 161 and the housing 10. By providing the fifth sealing ring 135, the sealing performance between the cable connector 161 and the housing 10 in the connected state can be improved.

[0116] In one specific embodiment, cable connector 161 is a waterproof connector.

[0117] In some embodiments, optionally, one end of the cable 162 extending into the housing 10 is connected to a cold-pressed terminal 163. The cold-pressed terminal 163 is a metal fitting. The cold-pressed terminal 163 is sleeved on one end of the electrode body 111 located inside the housing 10 to achieve an electrical connection between the cable 162 and the electrode body 111.

[0118] Optionally, the conductivity level switch 1 also includes a limiting member 164. The limiting member 164 is connected to the electrode body 111 and is used to limit the cold-pressed terminal 163 to prevent the cold-pressed terminal 163 from detaching from the electrode body 111.

[0119] Optionally, the limiting member 164 is a limiting nut. The limiting nut is threadedly connected to the electrode body 111.

[0120] In one specific embodiment, the limiting nut is an external hexagonal nut (hexagonal nut).

[0121] In one embodiment of this utility model, such as Figure 12 As shown, the liquid level monitoring system 2 includes a tank 21 and a conductive liquid level switch 1 as described in any of the above embodiments, with the conductive liquid level switch 1 disposed within the tank 21. The liquid level monitoring system 2 possesses the beneficial effects of any of the above embodiments, which will not be elaborated further here.

[0122] It should be noted that tank 21 is a liquid level tank. The conductive liquid to be measured is contained within tank 21. The conductivity-type liquid level switch 1 is used to monitor the liquid level of the conductive liquid being measured.

[0123] In some embodiments, the liquid level monitoring system 2 may optionally include a first mounting bracket 22 and an electrode relay 23. The electrode relay 23 is disposed on the first mounting bracket 22.

[0124] Electrode relay 23 is used for electrical connection with cable 162 of conductive level switch 1.

[0125] In some embodiments, the conductive level switch 1 is optionally connected to the inner wall of the tank 21 via a second mounting bracket 24.

[0126] Optionally, such as Figure 2 and Figure 8 As shown, the housing 10 is provided with a threaded mounting hole 108. The second mounting bracket 24 is connected to the threaded mounting hole 108 of the housing 10 via a second connector.

[0127] In one specific embodiment, the number of threaded mounting holes 108 is four.

[0128] In one specific embodiment, the second connector is a fixing screw. The second connector is threadedly connected to the threaded mounting hole 108.

[0129] In one specific embodiment, there are two conductive level switches 1 and two electrode relays 23. Each electrode relay 23 is electrically connected to a corresponding conductive level switch 1.

[0130] Optionally, such as Figure 12 As shown, the two conductive level switches 1 are installed at different heights. One conductive level switch 1 is used to monitor the first liquid level position 31 of the conductive liquid being measured, and the other conductive level switch 1 is used to monitor the second liquid level position 32 of the conductive liquid being measured.

[0131] Optionally, the first liquid level position 31 is higher than the second liquid level position 32.

[0132] In one specific embodiment, the first liquid level position 31 is the highest liquid level position (highest liquid level line). The second liquid level position 32 is the lowest liquid level position (lowest liquid level line).

[0133] In this utility model, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance; the term "multiple" refers to two or more unless otherwise explicitly defined. The terms "install," "connect," "join," and "fix" should be interpreted broadly. For example, "connect" can be a fixed connection, a detachable connection, or an integral connection; "join" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0134] In the description of this utility model, it should be understood that the terms "upper", "lower", "left", "right", "front", "rear", etc., 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 or unit referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0135] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0136] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A conductivity-type liquid level switch, characterized in that, It includes a housing (10), an electrode assembly (11), and a nozzle assembly (12), wherein the electrode assembly (11) and the nozzle assembly (12) are both disposed in the housing (10), and the nozzle assembly (12) is used to spray cleaning fluid onto the electrode assembly (11); The housing (10) is provided with a first mounting hole (102). The nozzle assembly (12) includes a nozzle fixing seat (121) and a nozzle body (122). The nozzle body (122) passes through the nozzle fixing seat (121). At least a portion of the nozzle fixing seat (121) is disposed in the first mounting hole (102). The nozzle fixing seat (121) is connected to the first mounting hole (102). The nozzle fixing seat (121) is used to limit the nozzle body (122). At least a portion of the nozzle body (122) is disposed outside the housing (10), and the outer wall of the nozzle body (122) disposed outside the housing (10) is provided with a spray hole (1221), which is used to spray cleaning fluid onto the electrode assembly (11).

2. The conductivity-type liquid level switch according to claim 1, characterized in that, The first mounting hole (102) includes a first hole segment (1021) and a second hole segment (1022) connected together. The radial dimension of the first hole segment (1021) is greater than the radial dimension of the second hole segment (1022). The connecting wall between the first hole segment (1021) and the second hole segment (1022) is a first stepped surface (1023). The nozzle body (122) passes through the first hole section (1021) and the second hole section (1022). The outer wall of the nozzle body (122) is provided with a first limiting protrusion (1222). One side of the first limiting protrusion (1222) is used to abut against the first step surface (1023), and the other side of the first limiting protrusion (1222) is used to abut against the nozzle fixing seat (121).

3. The conductivity-type liquid level switch according to claim 2, characterized in that, At least a portion of the nozzle holder (121) is disposed within the first hole section (1021). One end of the nozzle holder (121) disposed within the first hole section (1021) is used to abut against the first limiting protrusion (1222). The nozzle holder (121) is threadedly connected to the first hole section (1021).

4. The conductivity-type liquid level switch according to claim 2, characterized in that, The first mounting hole (102) further includes a third hole segment (1024), which is connected to the second hole segment (1022). The second hole segment (1022) is located between the first hole segment (1021) and the third hole segment (1024). The radial dimension of the third hole segment (1024) is smaller than the radial dimension of the second hole segment (1022). The connecting wall between the third hole segment (1024) and the second hole segment (1022) is a second stepped surface (1025). The conductive liquid level switch also includes a first sealing ring (131), which is disposed in the second hole section (1022) and between the second step surface (1025) and the nozzle body (122).

5. The conductivity-type liquid level switch according to claim 1, characterized in that, The housing (10) is provided with a second mounting hole (104); The conductive liquid level switch also includes a cleaning fluid interface mounting base (14), at least a portion of which is disposed in the second mounting hole (104), and the cleaning fluid interface mounting base (14) and the second mounting hole (104) are detachably connected. The cleaning fluid inlet mounting base (14) is used to connect to the nozzle body (122) to provide cleaning fluid to the nozzle body (122).

6. The conductivity-type liquid level switch according to claim 5, characterized in that, The outer wall of the cleaning fluid interface mounting base (14) is provided with a first mounting groove (141). The conductive liquid level switch also includes a second sealing ring (132), at least a portion of which is disposed in the first mounting groove (141), and the second sealing ring (132) is used to abut against the wall of the second mounting hole (104).

7. The conductivity-type liquid level switch according to claim 1, characterized in that, The housing (10) is provided with a third mounting hole (106); The electrode assembly (11) includes an electrode body (111) and an electrode base (112). The electrode body (111) passes through the electrode base (112). At least a portion of the electrode base (112) is disposed in the third mounting hole (106). The electrode base (112) and the third mounting hole (106) are detachably connected. The electrode base (112) is used to limit the electrode body (111).

8. The conductivity-type liquid level switch according to claim 7, characterized in that, The third mounting hole (106) includes a fourth hole segment (1061) and a fifth hole segment (1062) that are connected. The radial dimension of the fourth hole segment (1061) is greater than the radial dimension of the fifth hole segment (1062). The connecting wall between the fourth hole segment (1061) and the fifth hole segment (1062) is a third stepped surface (1063). The electrode body (111) passes through the fourth hole segment (1061) and the fifth hole segment (1062). The outer wall of the electrode body (111) is provided with a second limiting protrusion (1111). One side of the second limiting protrusion (1111) is used to abut against the third step surface (1063), and the other side of the second limiting protrusion (1111) is used to abut against the electrode seat (112).

9. The conductivity-type liquid level switch according to claim 1, characterized in that, It also includes a cable connector (161) and a cable (162), wherein the cable connector (161) is detachably connected to the housing (10), one end of the cable (162) passes through the cable connector (161) and extends into the housing (10), and the cable (162) is used to electrically connect to the electrode assembly (11).

10. A liquid level monitoring system, characterized in that, include: Tank (21); The conductive liquid level switch as described in any one of claims 1 to 9 is disposed within the tank (21).

Images