Floating ball liquid level meter

Abstract

The utility model provides a floating ball liquid level meter. The floating ball liquid level meter comprises a guide rod; the machine head is positioned on one axial side of the guide rod; the installation structure is located between the guide rod and the machine head, the installation structure is provided with a wiring through hole formed in the axial direction of the guide rod, the installation structure comprises an insertion section and an installation section which are arranged in the axial direction of the guide rod, the insertion section is located on the side, close to the guide rod, of the installation section, and a first step structure is formed between the insertion section and the installation section; the first step structure is provided with a first annular step face surrounding the periphery of the insertion section, an annular crimping matching face is arranged on the side, away from the insertion section, of the installation section, and the crimping matching face surrounds the periphery of the connection position of the installation section and the machine head. According to the floating ball liquid level meter provided by the utility model, the instrument mounting pipe which does not need to be assembled with the floating ball liquid level meter is provided with an internal thread, so that the internal thread can be prevented from being arranged on the inner surface of the instrument mounting pipe of the solution tank, and the risk of solution pollution caused by residual stains at the internal thread of the instrument mounting pipe is avoided.

Description

Technical Field

[0001] This utility model generally relates to the field of instrumentation technology, and specifically to a float level gauge. Background Technology

[0002] Float level gauges, as commonly used level instruments, are typically mounted on solution tanks to automatically measure data such as the liquid level in the tank. Chinese Patent (CN202010493964.X) discloses a float level gauge with improved float flexibility, comprising a display device with a threaded connector fixedly connected to its bottom. The float level gauge is screwed to the solution tank via the threaded connector.

[0003] When the aforementioned float level gauge is used in a solution tank, the inner side of the level gauge mounting port of the solution tank needs to be provided with an internal thread to mate with a threaded connector. However, the internal thread is not easy to clean, which can lead to the accumulation of dirt and increase the risk of contamination of the liquid in the solution tank. Utility Model Content

[0004] In view of the above-mentioned defects or deficiencies in the prior art, it is desirable to provide a float level gauge.

[0005] This application provides a float level gauge, comprising:

[0006] Guide rod;

[0007] The headstock is located on one axial side of the guide rod;

[0008] The mounting structure is located between the guide rod and the machine head. The mounting structure has a wiring through hole arranged along the axial direction of the guide rod. The mounting structure includes an insertion section and an installation section arranged along the axial direction of the guide rod. The insertion section is located on the side of the installation section closer to the guide rod. One end of the guide rod is connected to the insertion section and the machine head is connected to the installation section. A first step structure is formed between the insertion section and the installation section. The first step structure has a first annular step surface surrounding the outer periphery of the insertion section. The side of the installation section away from the insertion section has an annular pressing mating surface, and the pressing mating surface surrounds the outer periphery of the connection position between the installation section and the machine head.

[0009] Furthermore, the installation section includes an overlapping section and a connecting section. The overlapping section connects the connecting section and the insertion section. A second step structure is formed between the overlapping section and the connecting section. The second step structure has a second annular step surface surrounding the outer periphery of the connecting section. The second annular step surface constitutes a pressing mating surface. The machine head is connected to the connecting section.

[0010] Furthermore, the second annular step surface is circular.

[0011] Furthermore, the installation section has multiple threaded connection holes on the side away from the insertion section, and the multiple threaded connection holes surround the outer periphery of the wiring through hole. The head includes an aviation plug, and the aviation plug is screwed into the multiple threaded connection holes by multiple screws.

[0012] Furthermore, the wiring through hole has a threaded connection section, and the machine head is equipped with a connecting pipe. One end of the connecting pipe is inserted into the wiring through hole and screwed into the threaded connection section.

[0013] Furthermore, the outer peripheral surface of the insertion section is recessed with a first receiving groove.

[0014] Furthermore, the first receiving groove is equipped with a sealing element.

[0015] Furthermore, the first receiving groove has a ring-shaped structure.

[0016] Furthermore, the first annular step surface is circular.

[0017] Furthermore, the installation structure is a single, integrated structure.

[0018] The float level gauge provided in this application has an installation structure between the guide rod and the head. The installation structure has an insertion section and an installation section arranged along the axial direction of the guide rod. A first step structure is formed between the insertion section and the installation section. The first step structure has a first annular step surface surrounding the outer periphery of the insertion section. The side of the installation section away from the insertion section has a pressing mating surface surrounding the outer periphery of the connection position between the installation section and the head. This allows the float level gauge to be fixed to the instrument installation tube of the solution tank by screwing a threaded cap onto it. When the float level gauge is installed in the instrument installation tube, the guide rod and the insertion section are inserted into the instrument installation tube, and the insertion section forms a radial limit with the inner side of the instrument installation tube to restrict the radial movement of the level gauge. Under the action of the threaded cap pressing against the pressing mating surface, the installation section presses against the outer end face of the instrument installation tube through the first annular step surface. This avoids the risk of residual dirt at the inner thread of the instrument installation tube contaminating the solution, thus preventing the instrument installation tube from having internal threads. Attached Figure Description

[0019] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0020] Figure 1 This is a schematic diagram of the structure of the float level gauge provided in the embodiments of this application;

[0021] Figure 2 This is a schematic diagram of the installation structure provided in the embodiments of this application;

[0022] Figure 3 This is a half-sectional schematic diagram of the installation structure provided in the embodiments of this application. Detailed Implementation

[0023] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the relevant utility model and not intended to limit the utility model. Furthermore, it should be noted that, for ease of description, only the parts relevant to the utility model are shown in the accompanying drawings.

[0024] Please refer to the attached document. Figure 1-3 This application provides a float level gauge for mounting in a solution tank. The solution tank has a cylindrical instrument mounting tube, one end of which extends out of the solution tank and the other end communicates with the inner cavity of the solution tank. The extended end of the instrument mounting tube has an external thread, and a threaded cap is fitted onto the extended end of the instrument mounting tube, with the threaded cap screwed into the external thread. The end cap of the threaded cap has a through-hole for clearance.

[0025] The float level gauge includes a guide rod 200, a head 100, and a mounting structure 300. The head 100 is located on one axial side of the guide rod 200, and the mounting structure 300 is located between the guide rod 200 and the head 100. A float 400 is movably sleeved on the guide rod 200. The mounting structure 300 has a wiring through hole 301, which extends through the mounting structure 300 along the axial direction of the guide rod 200. The mounting structure 300 includes an insertion section 310 and an installation section 320, which are arranged along the axial direction of the guide rod 200 and connected to each other. The insertion section 310 is located on the side of the installation section 320 closer to the guide rod 200. One end of the guide rod 200 is connected to the insertion section 310, and the head 100 is connected to the installation section 320. A first step structure 330 is formed between the insertion section 310 and the installation section 320. The first step structure 330 has a first annular step surface 331, which surrounds the outer periphery of the insertion section 310. The installation section 320 has an annular pressing mating surface on the side away from the insertion section 310, and the pressing mating surface surrounds the outer periphery of the connection position between the installation section 320 and the machine head 100.

[0026] The process of assembling the float level gauge into the instrument mounting tube of the solution tank is as follows:

[0027] First, insert the float level gauge without the head 100 into the instrument mounting tube. At this time, the guide rod 200 and the insertion section 310 are inserted into the instrument mounting tube, and the mounting section 320 overlaps the outer end face of the instrument mounting tube through the first annular stepped surface 331. Then, screw the threaded cap into the instrument mounting tube. At this time, the threaded cap abuts against the pressing mating surface to fix the float level gauge in the instrument mounting tube. The position on the mounting section 320 that connects to the head 100 is exposed from the clearance through hole. Finally, connect the head 100 to the mounting section 320.

[0028] The float level gauge provided in this embodiment does not require an internal thread on its instrument mounting tube, which avoids the risk of residual dirt at the internal thread of the instrument mounting tube contaminating the solution.

[0029] Optionally, the shape of the insertion section 310 is adapted to the shape of the cavity of the instrument mounting tube. For example, if the cross-section of the cavity in the instrument mounting tube is circular, then the cross-section of the insertion section 310 is a matching circle; or, if the cross-section of the cavity in the instrument mounting tube is polygonal, then the cross-section of the insertion section 310 is a matching polygon. Along the axial direction of the guide rod 200, the projection of the guide rod 200 is located at the center of the projection of the insertion section 310, and the projection of the insertion section 310 is located at the center of the projection of the mounting section 320. Preferably, the guide rod 200, the insertion section 310, and the mounting section 320 are all cylindrical and coaxially arranged, wherein the diameter of the insertion section 310 is larger than the diameter of the guide rod 200 and smaller than the diameter of the mounting section 320, and in this case, the first annular step surface 331 is annular.

[0030] In some embodiments of this application, a first receiving groove 311 is recessed on the outer peripheral surface of the insertion section 310, and the first receiving groove 311 is used to install a sealing element. When the float level gauge is installed on the instrument mounting tube, the sealing element is squeezed between the insertion section 310 and the instrument mounting tube, increasing the sealing between the insertion section 310 and the instrument mounting tube and preventing solution from leaking out from the insertion section 310.

[0031] Optionally, the first receiving groove 311 has an annular structure, in which case the sealing element can be a matching O-ring.

[0032] Alternatively, to avoid displacement of the sealing ring during the insertion of the instrument installation tube, the first receiving groove 311 can be positioned close to the first annular step surface 331, or one end of the first receiving groove 311 can extend to the first annular step surface 331.

[0033] Optionally, the crimping mating surface is recessed with an annular second receiving groove, and a sealing ring is installed in the second receiving groove, which increases the sealing between the threaded cap and the crimping mating surface and prevents external liquid from seeping in from here.

[0034] In some embodiments of this application, the mounting section 320 includes an overlapping section 321 and a connecting section 322. The overlapping section 321 connects the connecting section 322 and the insertion section 310. The head unit 100 is connected to the connecting section 322. A second step structure 340 is formed between the overlapping section 321 and the connecting section 322. The second step structure 340 has a second annular step surface 341, which surrounds the outer periphery of the connecting section 322. The second annular step surface 341 constitutes a crimping mating surface. This arrangement expands the axial spacing between the crimping mating surface and the head unit 100 along the guide rod 200, facilitating the assembly and disassembly of the threaded cap and the instrument mounting tube.

[0035] Optionally, the second annular step surface 341 is annular, which makes the contact area between the threaded cap and the press-fitting surface uniformly distributed, thereby improving the stability of the float level gauge on the instrument mounting pipe.

[0036] Optionally, the diameter of the overlapping section 321 is larger than the diameter of the connecting section 322 and the insertion section 310.

[0037] Optionally, the mounting structure 300 can be an integral structure, which facilitates the processing of the mounting structure 300 and improves the overall strength of the mounting structure 300; or, the mounting structure 300 can be a split connection structure, for example, the insertion section 310 and the overlapping section 321, as well as the overlapping section 321 and the connecting section 322 are welded together.

[0038] In some embodiments of this application, the mounting section 320 is provided with a plurality of threaded connection holes on the side away from the insertion section 310, and the plurality of threaded connection holes surround the outer periphery of the wiring through hole 301. The head unit 100 includes a housing and a display and an aviation plug installed in the housing. The aviation plug has a mounting flange, and the mounting flange is screwed to the plurality of threaded connection holes by a plurality of screws to realize a detachable fixed connection between the head unit 100 and the mounting section 320. The aviation plug passes through the threaded cap through the clearance through hole, and the sensor in the guide rod 200 is electrically connected to the display through the aviation plug.

[0039] Of course, the connection method between the head 100 and the mounting section 320 is not limited to the above. For example, it can also be: the wiring through hole 301 has a threaded connection section 322, the housing of the head 100 is provided with a connecting tube, one end of the connecting tube is inserted into the wiring through hole 301 and screwed into the threaded connection section 322, wherein the connecting tube passes through the threaded cap through the clearance through hole, and the detection sensor in the guide rod 200 is electrically connected to the display through a cable.

[0040] In some embodiments of this application, the guide rod 200 and the insertion section 310 are fixedly connected, for example, but not limited to, welding. Of course, the guide rod 200 and the insertion section 310 are detachably fixedly connected, for example, the guide rod 200 is screwed into the wiring through hole 301, so as to facilitate the replacement of the mounting structure 300 with different sizes, thereby improving the practicality of the float level gauge.

[0041] In some embodiments of this application, the first annular stepped surface 331 is recessed with multiple mounting grooves, which are spaced apart around the axis of the guide rod 200. Each mounting groove has a hook on its axial sidewall, and a spring is installed in each mounting groove. One end of the spring engages with the hook, and the other end extends out of the mounting groove. When the threaded cap presses against the mating surface, the spring is compressed into the mounting groove. During the process of removing the threaded cap, the level gauge moves upward under the elastic force of the spring, so that the mounting section 320 and the instrument mounting tube are separated, thereby facilitating the removal of the level gauge from the instrument mounting tube.

[0042] It should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., used above to indicate orientation or positional relationships are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. 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 indicated technical features. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0043] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the utility model involved in this application is not limited to the technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the inventive concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. A float level gauge, characterized in that include: Guide rod; The machine head is located on one axial side of the guide rod; The mounting structure is located between the guide rod and the machine head. The mounting structure has a wiring through-hole arranged along the axial direction of the guide rod. The mounting structure includes an insertion section and an installation section arranged along the axial direction of the guide rod. The insertion section is located on the side of the installation section closer to the guide rod. One end of the guide rod is connected to the insertion section, and the machine head is connected to the installation section. A first step structure is formed between the insertion section and the installation section. The first step structure has a first annular step surface surrounding the outer periphery of the insertion section. The side of the installation section away from the insertion section has an annular pressing mating surface, and the pressing mating surface surrounds the outer periphery of the connection position between the installation section and the machine head.

2. The float level gauge according to claim 1, characterized in that The installation section includes an overlapping section and a connecting section. The overlapping section is connected between the connecting section and the insertion section. A second step structure is formed between the overlapping section and the connecting section. The second step structure has a second annular step surface surrounding the outer periphery of the connecting section. The second annular step surface constitutes the pressing mating surface. The machine head is connected to the connecting section.

3. The float level gauge according to claim 2, characterized in that The second annular step surface is circular.

4. The float level gauge according to claim 1, characterized in that The mounting section has multiple threaded connection holes on the side away from the insertion section, and the multiple threaded connection holes surround the outer periphery of the wiring through hole. The machine head includes an aviation plug, and the aviation plug is screwed into the multiple threaded connection holes by multiple screw connectors.

5. The float level gauge according to claim 1, characterized in that The wiring through hole has a threaded connection section, and the machine head is provided with a connecting pipe. One end of the connecting pipe is inserted into the wiring through hole and screwed into the threaded connection section.

6. The float level gauge according to claim 1, characterized in that The outer peripheral surface of the insertion section is recessed with a first receiving groove.

7. The float level gauge according to claim 6, characterized in that The first receiving groove is equipped with a sealing element.

8. The float level gauge according to claim 6, characterized in that The first receiving groove has a ring-shaped structure.

9. The float level gauge according to claim 1, characterized in that The first annular step surface is circular.

10. The float level gauge according to claim 1, characterized in that, The installation structure is an integral structure.

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