Float-type tank level gauge

Abstract

The present application relates to the technical field of liquid level meter, disclose a kind of float type tank liquid level meter, including liquid level meter body, the liquid level meter body side is connected with the fixed connecting pipe, further include: first flange assembly, installation in the connecting pipe end away from liquid level meter body;In the application, the gap between the second flange plate and the second waterproof sleeve in the second flange assembly is inserted into the top slot position of the first flange assembly, so that the second flange plate and the first flange plate are aligned and attached, at this time, the sealing block and the adapter block are slid into the first waterproof sleeve and the clearance slot opened at the top of the abutting plate to complete the predetermined positioning, the screw holes on the first flange plate and the second flange plate are automatically aligned with the butt thread holes, so that the screw holes on the two groups of butt pipes flanges do not need to be one-to-one corresponding, can quickly form predetermined positioning, and when tightening the fastening bolt subsequently, the butt pipe does not need to be held, to prevent the problem of deviation.

Description

Technical Field

[0001] This invention relates to the field of liquid level gauge technology, specifically to a float-type tank liquid level gauge. Background Technology

[0002] Liquid level measurement is a crucial step in industrial production, widely used in petroleum, chemical, and power industries. Accurate liquid level measurement not only ensures the smooth operation of production processes but also plays a decisive role in product quality control, safe production, and the rational utilization of resources. Float-type liquid level gauges, with their outstanding advantages of high measurement accuracy and reliability, have become commonly used equipment in the field of liquid level measurement.

[0003] However, when installing traditional float-type level gauges with storage tanks, the installation pipe flange must first be connected to the level gauge pipeline before tightening the bolts one by one. This not only makes the installation process cumbersome and time-consuming, but also causes the level gauge pipeline flange to be directly immersed in the medium inside the tank after installation. The bolts and bolt holes are easily corroded by corrosive media, which not only increases the difficulty of subsequent disassembly and maintenance, but also easily leads to leakage problems at the sealing surface after long-term use. Summary of the Invention

[0004] The purpose of this invention is to provide a float-type tank level gauge that achieves a multi-component design, effectively simplifies the installation and fastening process, enables synchronous transmission and locking of multiple bolts, improves the sealing reliability of flange connections, and reduces the difficulty of installation and maintenance.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a float-type tank level gauge, comprising a level gauge body, wherein a connecting pipe is fixedly connected to one side of the level gauge body, and further comprising: The first flange assembly is installed at the end of the connecting pipe away from the liquid level gauge body. The first flange assembly includes a first flange and fastening bolts. The first flange assembly is used to realize the pipe connection and sealing of the end of the connecting pipe. The second flange assembly is installed at the end of the connecting pipe away from the liquid level gauge body. The second flange assembly includes a second flange plate and is used to achieve pipe connection and sealing at the end of the connecting pipe. A fastening assembly is installed at the opening of the first flange assembly near the connecting pipe end. The fastening assembly includes a fastening sleeve and is used to synchronously drive and seal multiple sets of fastening bolts inside the first flange assembly. A connecting assembly is movably installed on the inner wall of the first flange assembly near the opening at one end of the connecting pipe. The connecting assembly includes a connecting plate and is used for positioning and installing multiple sets of fastening bolts. A clamping assembly is installed at the opening of the first flange near the second flange assembly. The clamping assembly includes a clamping plate and is used to provide thread sealing to the side of the second flange assembly away from the first flange assembly. A synchronous positioning component is installed on the inner wall of the first waterproof sleeve near the abutment plate. The synchronous positioning component includes a lever and is used to synchronously adjust the abutment component.

[0006] Preferably, the fastening bolts are threaded into the threaded holes on the side of the first flange away from the second flange assembly, and the first flange is externally sealed with a first waterproof sleeve.

[0007] Preferably, the first waterproof sleeve has an internal threaded groove at the opening near the connecting pipe, and a limit baffle is integrally formed at the opening away from the connecting pipe. A slot is provided at the top edge of the first waterproof sleeve near the second flange assembly, and a clearance groove is provided at the top of the first waterproof sleeve near the second flange assembly. The slot is connected to the inner wall of the first waterproof sleeve, and the clearance groove is connected to the slot.

[0008] Preferably, the second flange has a threaded hole through its side that matches the screw hole on the side of the first flange, and a second waterproof sleeve is integrally formed on the end of the second flange away from the first flange assembly. A sealing block is sealed and fixed on the top circumference of the second flange, and a connecting block is fixedly installed between the sealing block and the second waterproof sleeve.

[0009] Preferably, the fastening sleeve has an external threaded groove on its exterior, and a toothed ring is integrally formed at one end of the fastening sleeve near the inner wall of the first waterproof sleeve. The fastening sleeve is threadedly assembled with the internal threaded groove in the inner wall of the first waterproof sleeve through the external threaded groove. The thread lead between the external threaded groove and the internal threaded groove and the thread lead of the fastening bolt are adapted to the thread lead of the screw hole on the side of the first flange.

[0010] Preferably, the connecting plate slides within the inner wall of the first waterproof sleeve, and multiple sets of fastening bolts are circumferentially and rotatably installed on the side of the connecting plate. A gear is fixedly fitted onto one end of each fastening bolt near the fastening sleeve, and a support spring is fixedly installed between the connecting plate and the side of the first flange.

[0011] Preferably, the gear ring meshes with multiple sets of gears, and the fastening bolts correspond one-to-one with the screw holes on the side of the first flange and the mating threaded holes on the side of the second flange.

[0012] Preferably, the abutment plate slides within the inner wall of the first waterproof sleeve, and rubber sleeves are fixedly installed at equal intervals on the circumference of the abutment plate near the first flange. A positioning spring is fixedly installed between the abutment plate and the limiting baffle, and the positions of the multiple sets of rubber sleeves correspond one-to-one with the threaded holes on the side of the second flange.

[0013] Preferably, one end of the pusher is fixedly connected to the abutment plate near the limiting baffle, the top of the passive wedge is provided with an active wedge, and the bottom of the opening of the first waterproof sleeve near the limiting baffle is respectively provided with movable grooves, and a through groove is provided between the two sets of movable grooves.

[0014] Preferably, the movable groove and the through groove form an L-shaped structure, the lever is a hook-shaped structure, the lever slides in the channel formed by the movable groove and the through groove, the active wedge has an integrally formed stop near the top, the stop slides in the inner wall of the movable groove on the same side, the top of the stop is in contact with the top of the inner wall of the movable groove on the same side, and the adjacent surfaces of the active wedge and the passive wedge are in contact.

[0015] Compared with the prior art, the beneficial effects of the present invention are: In this invention, the gap between the second flange and the second waterproof sleeve in the second flange assembly is aligned with the slot position at the top of the first flange assembly and inserted, so that the second flange and the first flange are aligned and fitted. At this time, the sealing block and the connecting block slide along the slot into the clearance groove opened at the top of the first waterproof sleeve and the abutment plate to complete the pre-positioning. The screw holes and mating thread holes on the first flange and the second flange are automatically aligned. In this way, it is not necessary to match the screw holes on the two sets of mating pipe flanges one by one, which can quickly form the pre-positioning. At the same time, when tightening the fastening bolts later, it is not necessary to hold the mating pipe, which prevents the misalignment problem.

[0016] In this invention, by rotating the fastening sleeve along the internal thread groove on the inner wall of the first waterproof sleeve, the toothed ring moves synchronously axially. While the toothed ring pushes against the connecting plate axially, it drives multiple sets of gears to rotate synchronously through tooth surface meshing, thereby driving all fastening bolts to rotate synchronously, screwing them into the threaded holes of the first flange and finally into the mating threaded holes of the second flange. Only a single step of rotating the fastening sleeve is required to complete the synchronous locking operation of all fastening bolts, which greatly simplifies the installation process, shortens the installation time, and ensures that all fastening bolts are subjected to uniform force, avoiding sealing failure or bolt damage caused by uneven force.

[0017] In this invention, the second flange presses down on the active wedge at the bottom of the inner wall of the first waterproof sleeve, and pushes the passive wedge towards the second flange assembly through the inclined surface. The passive wedge drives the pusher to push the abutment plate to slide along the inner wall of the first waterproof sleeve, so that the rubber sleeve on the side of the abutment plate is inserted into the opening of the mating thread hole on the outside of the second flange. In this way, after the subsequent fastening bolts tighten the first and second flanges, the bolt ends can be wrapped and protected. Together with the sealing blocks, connecting blocks and slots and relief grooves on the first and second waterproof sleeves, the overall connection and sealing structure formed by the insertion of the sealing blocks, connecting blocks and slots and relief grooves can prevent the corrosive media inside the storage tank from contacting and eroding the bolts and threads, reduce the difficulty of subsequent disassembly and maintenance, maintain good sealing performance for long-term use, and reduce the risk of seal leakage. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a schematic diagram of the structure of the first flange assembly and the second flange assembly in this invention; Figure 3 This is a schematic diagram of the fastening sleeve and connecting plate structure in this invention; Figure 4 This is a schematic diagram of the disassembled structure of the first flange and the second flange in this invention; Figure 5 This is a schematic diagram of the structure of the second flange assembly inserted into the first flange assembly in this invention; Figure 6 This is a schematic cross-sectional view of the first flange assembly in this invention; Figure 7 This is a schematic diagram of the assembly structure of the clamping component and the first flange component in this invention; Figure 8 for Figure 2 A magnified view of the structure at point A in the middle; Figure 9 for Figure 6 A magnified schematic diagram of the structure at point B in the middle.

[0019] In the diagram: 100, Level gauge body; 200, First flange assembly; 300, Second flange assembly; 400, Fastening assembly; 500, Connecting assembly; 600, Clamping assembly; 700, Synchronous positioning assembly; 11, Connecting pipe; 21, First flange; 22, Fastening bolt; 23, First waterproof sleeve; 231, Internal thread groove; 232, Limiting baffle; 233, Slot; 234, Clearance groove; 31, Second flange assembly. 32. Flange; 33. Threaded hole; 33. Second waterproof sleeve; 331. Sealing block; 332. Connecting block; 41. Fastening sleeve; 42. External threaded groove; 43. Gear ring; 51. Connecting plate; 52. Gear; 53. Support spring; 61. Abutting plate; 62. Rubber sleeve; 63. Positioning spring; 71. Pulley; 72. Passive wedge; 73. Active wedge; 711. Movable groove; 712. Through groove; 731. Stop block. Detailed Implementation

[0020] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. The described embodiments are only some embodiments of the present invention, and not all embodiments.

[0021] Example 1: This embodiment provides a float-type tank level gauge, such as... Figures 1-9 As shown, it includes a level gauge body 100, a connecting pipe 11 fixedly connected to one side of the level gauge body 100, and also includes: The first flange assembly 200 is installed at the end of the connecting pipe 11 away from the liquid level gauge body 100. The first flange assembly 200 includes a first flange 21 and fastening bolts 22. The first flange assembly 200 is used to seal the liquid introduced into the end of the connecting pipe 11. The second flange assembly 300 is installed at the end of the connecting pipe 11 away from the liquid level gauge body 100. The second flange assembly 300 includes a second flange 31. The first flange assembly 200 is used to realize the pipe connection and sealing of the end of the connecting pipe 11. Fastening assembly 400 is installed at the opening of the first flange assembly 200 near the end of the connecting pipe 11. Fastening assembly 400 includes fastening sleeve 41. The second flange assembly 300 is used to realize the pipe connection and sealing of the end of the connecting pipe 11. The connecting assembly 500 is movably installed on the inner wall of the first flange assembly 200 near the opening at one end of the connecting pipe 11. The connecting assembly 500 includes a connecting plate 51 and is used for the installation and positioning of multiple sets of fastening bolts 22.

[0022] The fastening bolts 22 are threaded into the threaded holes on the side of the first flange 21 away from the second flange assembly 300, and the first flange 21 is externally sealed with a first waterproof sleeve 23.

[0023] The first waterproof sleeve 23 has an internal threaded groove 231 at the opening near the connecting pipe 11, and a limit baffle 232 integrally formed at the opening away from the connecting pipe 11. The first waterproof sleeve 23 has a slot 233 at the edge of the top of the first waterproof sleeve 23 near the second flange assembly 300, and a clearance groove 234 at the top of the first waterproof sleeve 23 near the second flange assembly 300. The slot 233 is connected to the inner wall of the first waterproof sleeve 23, and the clearance groove 234 is connected to the slot 233.

[0024] This design is for reference. Figure 2 , Figure 4 In the second flange assembly 300, the gap between the second flange 31 and the second waterproof sleeve 33 is aligned with the slot 233 at the top of the first flange assembly 200 and inserted, so that the second flange 31 and the first flange 21 are aligned and fitted. At this time, the sealing block 331 and the connecting block 332 slide along the slot 233 into the clearance groove 234 opened at the top of the first waterproof sleeve 23 and the abutment plate 61 to complete the pre-positioning. The screw holes on the first flange 21 and the second flange 31 and the mating threaded hole 32 are automatically aligned. In this way, it is not necessary to match the screw holes on the two sets of mating pipe flanges one by one, and the pre-positioning can be quickly formed. At the same time, when tightening the fastening bolts 22 later, it is not necessary to hold the mating pipe, which prevents the problem of misalignment.

[0025] The second flange 31 has a threaded hole 32 through which a mating thread hole 32 is opened on the side, which is compatible with the screw hole on the side of the first flange 21. The second flange 31 has a second waterproof sleeve 33 integrally formed at the end away from the first flange assembly 200. A sealing block 331 is sealed and fixed on the top circumference of the second flange 31. A connecting block 332 is fixedly installed between the sealing block 331 and the second waterproof sleeve 33.

[0026] This design is for reference. Figure 2 , Figure 3 , Figure 5 After the second flange assembly 300 and the first flange assembly 200 are pre-positioned, the sealing block 331 and connecting block 332 on the top of the first waterproof sleeve 23 and the second waterproof sleeve 33 are respectively connected and sealed with the slot 233 and the relief groove 234. This allows the first flange 21 and the second flange 31 to be tightly wrapped by the first waterproof sleeve 23 and the second waterproof sleeve 33 after they are mated, which plays a certain sealing role on the threads and prevents them from being directly immersed and corroded by the medium in the tank.

[0027] The fastening sleeve 41 has an external threaded groove 42 on its outside. A toothed ring 43 is integrally formed at one end of the fastening sleeve 41 near the inner wall of the first waterproof sleeve 23. The fastening sleeve 41 is threadedly assembled with the internal threaded groove 231 in the inner wall of the first waterproof sleeve 23 through the external threaded groove 42. The thread lead between the external threaded groove 42 and the internal threaded groove 231 and the thread lead of the fastening bolt 22 are adapted to the thread lead of the screw hole on the side of the first flange 21. The connecting plate 51 slides in the inner wall of the first waterproof sleeve 23. Multiple sets of fastening bolts 22 are circumferentially and equally spaced and rotated on the side of the connecting plate 51. A gear 52 is fixedly sleeved at one end of the fastening bolt 22 near the fastening sleeve 41. A support spring 53 is fixedly installed between the connecting plate 51 and the side of the first flange 21. The toothed ring 43 meshes with multiple sets of gears 52. The positions of the fastening bolt 22, the screw hole on the side of the first flange 21, and the mating threaded hole 32 on the side of the second flange 31 correspond one-to-one.

[0028] This design is for reference. Figures 6-8 By rotating the fastening sleeve 41, the fastening sleeve 41 is screwed into the inner thread groove 231 of the inner wall of the first waterproof sleeve 23 through the external thread groove 42, which drives the toothed ring 43 to move synchronously along the axial direction. While the toothed ring 43 pushes against the connecting plate 51 in the axial direction, it drives multiple sets of gears 52 to rotate synchronously through tooth surface meshing, thereby driving all fastening bolts 22 to rotate synchronously, screwing into the threaded hole 32 of the second flange 31 and finally screwing them into the mating threaded hole 32 of the second flange 31. Only one step of rotating the fastening sleeve 41 is needed to complete the synchronous locking operation of all fastening bolts 22, which greatly simplifies the installation process, shortens the installation time, and ensures that all fastening bolts 22 are subjected to uniform force, avoiding sealing failure or bolt damage caused by uneven force.

[0029] Example 2: Based on Example 1, this example provides a float-type tank level gauge, such as... Figures 3-9 As shown, it includes: The clamping assembly 600 is installed at the opening of the first flange 21 near the second flange assembly 300. The clamping assembly 600 includes a clamping plate 61 and is used to provide thread sealing to the side of the second flange assembly 300 away from the first flange assembly 200. The synchronous positioning component 700 is installed on the inner wall of the first waterproof sleeve 23 near the abutment plate 61. The synchronous positioning component 700 includes a lever 71 and is used to synchronously adjust the abutment component 600.

[0030] The abutment plate 61 slides within the inner wall of the first waterproof sleeve 23. Rubber sleeves 62 are fixedly installed at equal intervals on the circumference of the abutment plate 61 near the first flange 21. A positioning spring 63 is fixedly installed between the abutment plate 61 and the limiting baffle 232. Multiple sets of rubber sleeves 62 correspond one-to-one with the threaded holes 32 on the side of the second flange 31. One end of the lever 71 is fixedly connected to the abutment plate 61 near the limiting baffle 232, and the other end of the lever 71 is fixedly connected to a passive wedge 72. An active wedge 73 is provided at the top of the passive wedge 72. The inner wall of the first waterproof sleeve 23... Near the limit baffle 232, one end of the opening has a movable groove 711, and a through groove 712 is formed between the two sets of movable grooves 711. The movable grooves 711 and the through groove 712 form an L-shaped structure. The lever 71 has a hook-shaped structure and slides in the channel formed by the movable grooves 711 and the through groove 712. The active wedge 73 has a stop 731 integrally formed near the top. The stop 731 slides in the inner wall of the movable groove 711 on the same side. The top of the stop 731 is in contact with the top of the inner wall of the movable groove 711 on the same side. The adjacent surfaces of the active wedge 73 and the passive wedge 72 are in contact.

[0031] This design is for reference. Figure 5 , Figure 7 , Figure 9 After the second flange assembly 300 and the first flange assembly 200 are pre-positioned, the second flange 31 presses down on the active wedge 73 at the bottom of the inner wall of the first waterproof sleeve 23. The active wedge 73 moves downward along the movable groove 711 and pushes the passive wedge 72 towards the second flange assembly 300 through the inclined surface. The passive wedge 72 drives the pusher block 71 to push the abutment plate 61 to slide along the inner wall of the first waterproof sleeve 23, so that the rubber sleeve 62 on the side of the abutment plate 61 is inserted into the opening of the mating thread hole 32 on the outside of the second flange 31. In this way, after the subsequent fastening bolts 22 tighten the first flange 21 and the second flange 31, the bolt ends can be wrapped and protected. With the sealing block 331, connecting block 332 and slot 233 and relief groove 234 on the first waterproof sleeve 23 and the second waterproof sleeve 33, the overall connection and sealing structure formed by the insertion of the sealing block 331, connecting block 332 and the slot 233 and relief groove 234 can prevent the corrosive medium inside the storage tank from contacting and eroding the bolts and threads, reduce the difficulty of subsequent disassembly and maintenance, maintain good sealing performance for long-term use, and reduce the risk of seal leakage.

[0032] Working principle: When using a float-type tank level gauge, first align the gap between the second flange 31 and the second waterproof sleeve 33 in the second flange assembly 300 with the slot 233 at the top of the first flange assembly 200, and insert it to complete the alignment and contact between the second flange 31 and the first flange 21. At this time, the sealing block 331 and the connecting block 332 slide along the slot 233 into the clearance groove 234 opened at the top of the first waterproof sleeve 23 and the abutment plate 61, completing the pre-positioning of the first flange assembly 200 and the second flange assembly 300. The screw holes on the first flange 21 automatically align with the mating threaded holes 32 on the second flange 31. Alignment is achieved by rotating the fastening sleeve 41, eliminating the need for manual adjustment. The fastening sleeve 41 then rotates along the internal thread groove 231 on the inner wall of the first waterproof sleeve 23 via the external thread groove 42, causing the gear ring 43 to move axially in sync. While pushing the connecting plate 51 toward the second flange assembly 300, the gear ring 43 meshes and drives multiple sets of gears 52 to rotate synchronously, thereby driving all fastening bolts 22 to rotate synchronously, rotate along the threaded holes of the first flange 21, and finally screw into the mating threaded holes 32 of the second flange 31. The synchronous locking of all connecting bolts can be completed by simply rotating the fastening sleeve 41 in one step.

[0033] During the insertion and positioning of the second flange 31, the end of the second flange 31 will pre-press down the active wedge 73 on the inner wall of the first waterproof sleeve 23. After the active wedge 73 moves downward along the movable groove 711, it pushes the passive wedge 72 towards the second flange assembly 300 through the inclined surface. The passive wedge 72 drives the pusher block 71 to push the abutment plate 61 to slide along the inner wall of the first waterproof sleeve 23, so that the rubber sleeve 62 on the side of the abutment plate 61 is inserted into the opening of the mating thread hole 32 on the outside of the second flange 31. When the fastening bolt 22 is tightened in place, the rubber sleeve 62 completely covers the end of the bolt that protrudes from the second flange 31, forming a complete sealing and protective structure.

[0034] After installation and commissioning, the first waterproof sleeve 23, the second waterproof sleeve 33, the sealing block 331, and the rubber sleeve 62 together form a complete isolation and protection structure, completely isolating all threaded connection structures from the internal medium of the storage tank, preventing corrosive media from eroding the bolts and threads; when maintenance and disassembly are required, simply pull the active wedge block 73 upward, the positioning spring 63 pushes the clamping plate 61 to reset, and the fastening sleeve 41 rotates in the opposite direction to drive all the fastening bolts 22 to be unscrewed simultaneously, quickly completing the equipment disassembly and greatly improving the convenience of maintenance.

[0035] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes and modifications can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A float type tank liquid level gauge, comprising a liquid level gauge body (100), a first flange assembly (200), a second flange assembly (300), a fastening assembly (400), a connecting assembly (500), a abutting assembly (600) and a synchronous positioning assembly (700), a connecting pipe (11) is fixedly connected in communication on one side of the liquid level gauge body (100), characterized in that: The first flange assembly (200) is installed at the end of the connecting pipe (11) away from the liquid level gauge body (100). The first flange assembly (200) includes a first flange (21) and fastening bolts (22). The first flange assembly (200) is used to realize the pipe connection and sealing of the end of the connecting pipe (11). The second flange assembly (300) is installed at the end of the connecting pipe (11) away from the liquid level gauge body (100). The second flange assembly (300) includes a second flange (31). The second flange assembly (300) is used to achieve pipe connection and sealing at the end of the connecting pipe (11). The fastening assembly (400) is installed at the opening of the first flange assembly (200) near the connecting pipe (11). The fastening assembly (400) includes a fastening sleeve (41). The fastening assembly (400) is used to synchronously drive and seal multiple sets of fastening bolts (22) inside the first flange assembly (200). The connecting assembly (500) is movably installed on the inner wall of the first flange assembly (200) near the opening at one end of the connecting pipe (11). The connecting assembly (500) includes a connecting plate (51) and is used to install and position multiple sets of fastening bolts (22). The clamping assembly (600) is installed at the opening of the first flange (21) near the second flange assembly (300). The clamping assembly (600) includes a clamping plate (61) and is used to provide a thread seal to the side of the second flange assembly (300) away from the first flange assembly (200). The synchronous positioning component (700) is installed on the inner wall of the first waterproof sleeve (23) near the abutment plate (61). The synchronous positioning component (700) includes a lever (71) and is used to synchronously adjust the abutment component (600).

2. A float-type tank level gauge according to claim 1, characterized in that: The fastening bolt (22) is threaded into the threaded hole on the side of the first flange (21) away from the second flange assembly (300), and the first flange (21) is externally sealed with a first waterproof sleeve (23).

3. A float-type tank level gauge according to claim 2, wherein: The first waterproof sleeve (23) has an internal thread groove (231) at the opening near the connecting pipe (11), and a limit baffle (232) is integrally formed at the opening away from the connecting pipe (11). The first waterproof sleeve (23) has a slot (233) at the edge near the second flange assembly (300) at the top. The first waterproof sleeve (23) has a relief groove (234) at the top near the second flange assembly (300). The slot (233) is connected to the inner wall of the first waterproof sleeve (23), and the relief groove (234) is connected to the slot (233).

4. A float-type tank level gauge according to claim 3, wherein: The second flange (31) has a threaded hole (32) through which a mating thread hole (32) is provided on the side of the second flange (21) to match the threaded hole on the side of the first flange (21). The second flange (31) has a second waterproof sleeve (33) integrally formed at the end away from the first flange assembly (200). A sealing block (331) is sealed and fixed on the top circumference of the second flange (31). A connecting block (332) is fixedly installed between the sealing block (331) and the second waterproof sleeve (33).

5. A float-type tank level gauge according to claim 4, wherein: The fastening sleeve (41) has an external threaded groove (42) on its outside. The fastening sleeve (41) has a toothed ring (43) integrally formed at one end near the inner wall of the first waterproof sleeve (23). The fastening sleeve (41) is threadedly assembled with the internal threaded groove (231) in the inner wall of the first waterproof sleeve (23) through the external threaded groove (42). The thread lead between the external threaded groove (42) and the internal threaded groove (231) and the thread lead of the fastening bolt (22) are adapted to the thread lead of the screw hole on the side of the first flange (21).

6. A float-type tank level gauge according to claim 5, wherein: The connecting plate (51) slides in the inner wall of the first waterproof sleeve (23). Multiple sets of fastening bolts (22) are circumferentially and equally spaced and installed on the side of the connecting plate (51). A gear (52) is fixedly sleeved on one end of the fastening bolt (22) near the fastening sleeve (41). A support spring (53) is fixedly installed between the connecting plate (51) and the side of the first flange (21).

7. A float-type tank level gauge according to claim 6, characterized in that: The gear ring (43) meshes with multiple sets of gears (52), and the fastening bolts (22) correspond one-to-one with the screw holes on the side of the first flange (21) and the mating threaded holes (32) on the side of the second flange (31).

8. A float-type tank level gauge according to claim 7, characterized in that: The abutment plate (61) slides in the inner wall of the first waterproof sleeve (23). Rubber sleeves (62) are fixedly installed at equal intervals on the circumference of the abutment plate (61) near the first flange (21). A positioning spring (63) is fixedly installed between the abutment plate (61) and the limiting baffle (232). The positions of multiple sets of rubber sleeves (62) correspond one-to-one with the threaded holes (32) on the side of the second flange (31).

9. A float-type tank level gauge according to claim 8, characterized in that: One end of the lever (71) is fixedly connected to the abutment plate (61) near the side of the limiting baffle (232), and the other end of the lever (71) is fixedly connected to a passive wedge (72). An active wedge (73) is provided at the top of the passive wedge (72). Movable grooves (711) are respectively opened at the bottom of the opening of the inner wall of the first waterproof sleeve (23) near the limiting baffle (232), and a through groove (712) is provided between the two sets of movable grooves (711).

10. A float-type tank level gauge according to claim 9, characterized in that: The movable groove (711) and the through groove (712) form an L-shaped structure. The lever (71) has a hook-shaped structure. The lever (71) slides in the channel formed by the movable groove (711) and the through groove (712). The active wedge (73) has a stop (731) integrally formed near the top. The stop (731) slides in the inner wall of the movable groove (711) on the same side. The top of the stop (731) is in contact with the top of the inner wall of the movable groove (711) on the same side. The active wedge (73) is in contact with the adjacent surface of the passive wedge (72).

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