Window structure of liquid level meter

Abstract

The utility model belongs to the technical field of liquidometers, and particularly discloses a liquidometer window structure which comprises a transparent part, a sealing protection part and a fixing assembly, and a hub is installed in the upper side of a liquidometer body; the liquid level meter body is provided with a window, the fixing assembly is used for installing the transparent part in the window of the liquid level meter body, the fixing assembly is provided with an avoiding hole, and the avoiding hole cannot shield the window; the sealing protection part is installed on the side, away from the window, of the fixing assembly, and the sealing protection part is detachably connected to the fixing assembly or the liquid level meter body. And the floater, the hub and the steel wire in the liquid level meter main body can be observed through the transparent piece and the window. When the floater is installed, debugged and maintained, the position of the floater and the running conditions of the floater, the steel wire and the hub can be observed through the transparent piece, and the running states of the floater and an instrument can be known and mastered conveniently.

Description

Technical Field

[0001] The utility model belongs to the technical field of liquid level gauges, and particularly relates to a liquid level gauge window structure. Background Art

[0002] In nuclear power plants, chemical plants, water treatment plants, and food and beverage plants, the liquid level is an important parameter to ensure the stable operation of the plant. Therefore, accurate measurement of the liquid level is crucial.

[0003] A servo liquid level gauge is a liquid level measuring instrument that works based on the buoyancy (Archimedes' principle) balance principle. The facility that shows the vertical position of the float in a form that people can directly read and output through various physical means such as mechanical, electromagnetic, and optical means is a servo liquid level gauge. The servo liquid level gauge includes a measuring device, an electrical box, a terminal box, and a connection cavity. The measuring device includes a float floating on the liquid surface of the liquid medium, a fixedly installed hub, and a steel wire wound around the hub. One end of the steel wire is fixed to the float. The measuring device is connected to the main body of the liquid level gauge, the main body of the liquid level gauge is connected to the electrical box, and the electrical box is connected to the terminal box through a cable. A hub balance adjustment mechanism, an MPU board, and a display are installed in the electrical box.

[0004] Most existing liquid level gauges cannot meet the requirements of customers to observe the float, hub, and steel wire. As a result, during installation, commissioning, and maintenance, the operating conditions of the float, steel wire, and hub cannot be observed, making it impossible to intuitively grasp the operating state of the float and the instrument. Sometimes, it is necessary to open the cover for treatment, which is time-consuming and laborious. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a liquid level gauge window structure to solve the problem that the operating conditions of the float, steel wire, and hub cannot be observed in existing liquid level gauges, resulting in the inability to intuitively grasp the operating state of the float and the instrument, avoiding unnecessary cover opening operations, improving the working efficiency of operators, and reducing the labor intensity.

[0006] To achieve the above purpose, the technical solution of the utility model is: a liquid level gauge window structure, including a transparent member, a sealing and protecting member, and a fixing component. The hub is installed inside the upper side of the main body of the liquid level gauge; a window is provided on the main body of the liquid level gauge. The fixing component is used to install the transparent member in the window of the main body of the liquid level gauge. An avoidance hole is provided on the fixing component, and the avoidance hole does not block the window. The sealing and protecting member is installed on the side of the fixing component away from the window, and the sealing and protecting member is detachably connected to the fixing component or the main body of the liquid level gauge. Through the transparent member and the window, the float, hub, and steel wire inside the main body of the liquid level gauge can be observed.

[0007] Further, a flared opening for installing the transparent member is provided on the outer side of the window, and the fixing assembly is used to fix the transparent member within the flared opening.

[0008] Further, the fixing assembly includes a first fixing member, a first sealing member, a second sealing member, and a third sealing member. The diameter of the transparent member matches the diameter of the flared opening. The first sealing member is located between the transparent member and the bottom of the flared opening. The second sealing member is located between the first fixing member, the transparent member, and the main body of the liquid level gauge. The outer sides of the transparent member and the main body of the liquid level gauge are flush, and the end face of the second sealing member can press against the end faces of the transparent member and the main body of the liquid level gauge. The first fixing member presses the first sealing member and the transparent member within the flared opening and presses the second sealing member against the main body of the liquid level gauge and the transparent member. The first fixing member is located outside the main body of the liquid level gauge and is fixed to the main body of the liquid level gauge by a first fastener. Avoidance holes are provided on the first sealing member, the second sealing member, and the first fixing member.

[0009] Further, a third sealing member is installed between the sealing and protecting member and the first fixing member, and the sealing and protecting member and the first fixing member are fixed by a second fastener.

[0010] Further, the fixing assembly includes a second fixing member, a third fixing member, a fourth sealing member, a fifth sealing member, and a sixth sealing member. The second fixing member is of a convex structure. A first through hole is provided at the protruding end of the second fixing member, and a second through hole that is directly opposite to and communicates with the first through hole is provided at the bottom end of the second fixing member. The diameter of the first through hole is larger than the diameter of the second through hole. The diameter of the transparent member matches the diameter of the first through hole. The outer diameter of the protruding end of the second fixing member matches the diameter of the flared opening, and the outer diameter of the bottom end of the second fixing member is larger than the diameter of the flared opening. The diameter of the second through hole is not less than the diameter of the window. A first internal thread is provided on one side of the first through hole away from the second through hole, and a first external thread that matches the first internal thread is provided on the outer side of the third fixing member. The third fixing member can be threadedly connected within the first through hole. The transparent member is installed within the first through hole and can be pressed between the third fixing member and the inner bottom of the second fixing member. The length of the protruding end of the second fixing member is less than the depth of the flared opening. A fourth sealing member is provided between the third fixing member and the transparent member, a fifth sealing member is installed between the transparent member and the inner bottom of the second fixing member, and a sixth sealing member is installed between the bottom end of the second fixing member and the main body of the liquid level gauge. The bottom end of the second fixing member is located outside the main body of the liquid level gauge and is fixed to the main body of the liquid level gauge by a third fastener. Avoidance holes are provided on the third fixing member, the fourth sealing member, and the fifth sealing member.

[0011] Further, a seventh seal is installed between the sealing and protecting member and the second fixing member, and the sealing and protecting member and the second fixing member are fixed by a fourth fastener.

[0012] Further, the fixing assembly includes a fourth fixing member, an eighth seal and a ninth seal. A second internal thread is provided on one side of the flared opening away from the main body of the liquid level gauge. A second external thread matching the second internal thread is provided on the fourth fixing member. The fourth fixing member can be threadedly connected into the flared opening. The diameter of the transparent member matches the diameter of the flared opening. The transparent member is installed in the flared opening and can be pressed between the fourth fixing member and the bottom of the flared opening. The eighth seal is installed between the bottom of the flared opening and the transparent member, and the ninth seal is installed between the transparent member and the fourth fixing member.

[0013] Further, a third external thread is provided on the outer side of the main body of the liquid level gauge. The sealing and protecting member is of a concave structure. A third internal thread matching the third external thread is provided in the groove of the concave structure. The sealing and protecting member is fixed to the main body of the liquid level gauge through the third internal thread and the third external thread.

[0014] Further, a tenth seal is installed between the groove of the sealing and protecting member and the outer end of the main body of the liquid level gauge.

[0015] The working principle of this technical solution is as follows: During installation, the position of the float and the states of the hub and wire can be observed through the transparent member; during debugging, the position of the float can be observed through the transparent member to assist in setting the position of the float, and at the same time, the operating conditions of the hub and wire can also be observed through the transparent member; during maintenance, the operating conditions of the hub, wire and float can be observed through the transparent member.

[0016] The beneficial effects of this technical solution are as follows:

[0017] ① When installing, debugging and maintaining the float, the position of the float and the operating conditions of the float, wire and hub can be observed through the transparent member, which is convenient for understanding and mastering the operating state of the float and the instrument.

[0018] ② In this technical solution, by providing a sealing and protecting member, the entire window structure of the liquid level gauge can be protected, especially the protection and anti-leakage protection of the transparent member. Even if the transparent member is completely damaged by an external force, the sealing performance of the instrument at this place will not be damaged, that is, it will not cause the internal pressure medium to leak to the outside through the damaged transparent member or the outside air or rainwater to enter the instrument through the damaged transparent member.

[0019] ③In this technical solution, by setting the first seal, the second seal, the fourth seal, the fifth seal, the sixth seal, the eighth seal and the ninth seal, the liquid level gauge window structure can be isolated from the outside, thus ensuring the normal operation of the liquid level gauge. By setting the third seal, the seventh seal and the tenth seal on the sealing and protecting part, the outside of the transparent part of the liquid level gauge window (inside the sealing and protecting part) and the outside of the sealing and protecting part can be isolated, preventing leakage when the transparent part is damaged. Description of the Drawings

[0020] Figure 1 is the front view when the liquid level gauge window structure in the first embodiment of the present utility model is installed on the liquid level gauge;

[0021] Figure 2 is Figure 1 the partial side sectional view;

[0022] Figure 3 is Figure 2 the structural schematic diagram of the liquid level gauge window structure in

[0023] Figure 4 is the partial side sectional view when the liquid level gauge window structure in the second embodiment of the present utility model is installed on the liquid level gauge;

[0024] Figure 5 is Figure 4 the structural schematic diagram of the liquid level gauge window structure in

[0025] Figure 6 is the partial side sectional view when the liquid level gauge window structure in the third embodiment of the present utility model is installed on the liquid level gauge;

[0026] Figure 7 is Figure 6 the structural schematic diagram of the liquid level gauge window structure in Detailed Description of the Embodiments

[0027] The following is a further detailed description through specific embodiments:

[0028] The reference numerals in the drawings of the specification include: liquid level gauge main body 1, hub 2, float 3, steel wire 4, window 5, sealing and protecting part 6, first fixing part 7, first seal 8, second seal 9, third seal 10, second fixing part 11, third fixing part 12, fourth seal 13, fifth seal 14, sixth seal 15, protruding end 16, bottom end 17, seventh seal 18, fourth fixing part 19, eighth seal 20, ninth seal 21, tenth seal 22, transparent part 23, second through hole 24.

[0029] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0030] Embodiment 1

[0031] Basically as shown in the attached Figures 1-3 figure: The liquid level gauge window structure includes a transparent member 23, a sealing and protecting member 6 and a fixing component. The transparent member 23 is specifically made of glass. The hub 2 is installed inside the upper side of the liquid level gauge main body 1; a window 5 is provided on the liquid level gauge main body 1, and a flared opening for installing the transparent member 23 is provided outside the window 5. The fixing component is used to fix the transparent member 23 in the flared opening, and an avoidance hole is provided on the fixing component, and the avoidance hole will not block the window 5. The sealing and protecting member 6 is installed on the side of the fixing component away from the window 5, and the sealing and protecting member 6 is detachably connected to the fixing component. Through the transparent member 23 and the window 5, the float 3, the hub 2 and the steel wire 4 inside the liquid level gauge main body 1 can be observed. Specifically, when the upper side of the window 5 is higher than the bottom of the hub 2, it is convenient to observe the hub 2; of course, the upper side of the window 5 can also be lower than the bottom of the hub 2, and observation can be carried out by tilting the line of sight, but it is preferably within a range of 100 mm below the bottom of the hub 2. The lower side of the window 5 is lower than the bottom of the hub 2. Of course, the window 5 can be arranged at any position in the circumferential direction of the liquid level gauge main body 1 as long as the float 3, the hub 2 and the steel wire 4 can be observed. In this embodiment, it is arranged on the right side.

[0032] The fixing component includes a first fixing member 7, a first sealing member 8, a second sealing member 9 and a third sealing member 10. The diameter of the transparent member 23 matches the diameter of the flared opening. The first sealing member 8 is located between the transparent member 23 and the bottom of the flared opening. The second sealing member 9 is located between the first fixing member 7, the transparent member 23 and the liquid level gauge main body 1. The outer side of the transparent member 23 is flush with the outer side of the liquid level gauge main body 1. The end face of the second sealing member 9 can press on the end faces of the liquid level gauge main body 1 and the transparent member 23. The first fixing member 7 presses the first sealing member 8 and the transparent member 23 tightly in the flared opening and presses the second sealing member 9 on the liquid level gauge main body 1 and the transparent member 23. The first fixing member 7 is located on the outer side of the liquid level gauge main body 1 and is fixed to the liquid level gauge main body 1 by a first fastener. A number of first connection threaded holes are provided on the outer side of the liquid level gauge main body 1. Counterbores corresponding one-to-one to the first connection threaded holes are provided on the first fixing member 7. Round holes corresponding to the first connection threaded holes are provided on the second sealing member 9. The first fastener is a bolt. The threaded section of the first fastener passes through the counterbore and the round hole on the second sealing member 9 and then is threadedly connected to the first connection threaded hole. The head of the first fastener is located in the counterbore. Avoidance holes are provided on the first sealing member 8, the second sealing member 9 and the first fixing member 7. Specifically, the first sealing member 8 and the second sealing member 9 are sealing gaskets, and the first fixing member 7 is of an annular structure. The inner ring diameters of the first sealing member 8, the second sealing member 9 and the first fixing member 7 are not less than the diameter of the window 5 and the central axes of the four coincide. A third sealing member 10 is installed between the sealing protection member 6 and the first fixing member 7. The sealing protection member 6 and the first fixing member 7 are fixed by a second fastener. A number of second connection threaded holes are provided on the first fixing member 7. Connection holes corresponding one-to-one to the second connection threaded holes are provided on the sealing protection member 6. The third sealing member 10 is a sealing gasket. Round holes corresponding to the second connection threaded holes are provided on the third sealing member 10. The second fastener is a bolt. The threaded section of the second fastener passes through the connection hole and the round hole on the third sealing member 10 and then is connected to the second connection threaded hole. When the connection hole is a counterbore, the head of the first fastener is located in the counterbore. When the connection hole is a general hole, the head of the second fastener is located outside the connection hole and presses on the outside of the sealing protection member 6. The second connection threaded hole can be set as a blind hole.

[0033] Embodiment 2

[0034] Basically as shown in the appendix Figures 4-5As shown: the window structure of the liquid level gauge, including a transparent part 23, a sealing and protecting part 6 and a fixing component. The transparent part 23 is specifically made of glass. The hub 2 is installed inside the upper side of the liquid level gauge main body 1; a window 5 is provided on the liquid level gauge main body 1, and a flared opening for installing the transparent part 23 is provided outside the window 5. The fixing component is used to fix the transparent part 23 in the flared opening. An avoidance hole is provided on the fixing component, and the avoidance hole will not block the window 5; the sealing and protecting part 6 is installed on the side of the fixing component away from the window 5, and the sealing and protecting part 6 is detachably connected to the fixing component; through the transparent part 23 and the window 5, the float 3, the hub 2 and the steel wire 4 inside the liquid level gauge main body 1 can be observed.

[0035] The fixing component includes a second fixing member 11, a third fixing member 12, a fourth seal 13, a fifth seal 14, a sixth seal 15 and a seventh seal 18. The fourth seal 13, the fifth seal 14, the sixth seal 15 and the seventh seal 18 are all gaskets. The second fixing member 11 is of a convex structure. The protruding end 16 of the second fixing member 11 is provided with a first through hole, and the bottom end 17 of the second fixing member 11 is provided with a second through hole 24 that is opposite to and communicates with the first through hole. The diameter of the first through hole is larger than the diameter of the second through hole 24, and the diameter of the transparent member 23 matches the diameter of the first through hole; the outer diameter of the protruding end 16 of the second fixing member 11 matches the diameter of the flared opening, the outer diameter of the bottom end 17 of the second fixing member 11 is larger than the diameter of the flared opening, and the diameter of the second through hole 24 is not less than the diameter of the window 5; a first internal thread is provided on the side of the first through hole away from the second through hole 24, and a first external thread that matches the first internal thread is provided on the outside of the third fixing member 12. The third fixing member 12 can be threadedly connected into the first through hole; the transparent member 23 is installed in the first through hole and can be pressed between the third fixing member 12 and the inner bottom of the second fixing member 11. The length of the protruding end 16 of the second fixing member 11 is less than the depth of the flared opening, and there is a gap on the left side of the protruding end 16. A fourth seal 13 is provided between the third fixing member 12 and the transparent member 23, a fifth seal 14 is installed between the transparent member 23 and the inner bottom of the second fixing member 11, and a sixth seal 15 is installed between the bottom end 17 of the second fixing member 11 and the liquid level gauge body 1. The bottom end 17 of the second fixing member 11 is located outside the liquid level gauge body 1 and is fixed to the liquid level gauge body 1 by a third fastener. Specifically, the third fastener is a bolt. A number of third connection threaded holes are provided on the outside of the liquid level gauge body 1, and counterbores corresponding to the third connection threaded holes one by one are provided at the bottom end 17 of the second fixing member 11. Round holes corresponding to the third connection threaded holes are provided on the sixth seal 15. The threaded section of the third fastener passes through the counterbore and the round hole on the sixth seal 15 and then is threadedly connected to the third connection threaded hole. The head of the third fastener is located in the counterbore. Avoidance holes are provided on the third fixing member 12, the fourth seal 13 and the fifth seal 14. A seventh seal 18 is installed between the seal protection member 6 and the second fixing member 11, and the seal protection member 6 and the second fixing member 11 are fixed by a fourth fastener. A number of fourth connection threaded holes are provided on the second fixing member 11, connection holes corresponding to the fourth connection threaded holes one by one are provided on the seal protection member 6, and round holes corresponding to the fourth connection threaded holes are provided on the seventh seal 18. The fourth fastener is a bolt. The threaded section of the fourth fastener passes through the connection hole and the round hole on the seventh seal 18 and then is connected to the fourth connection threaded hole. When the connection hole is a counterbore, the head of the fourth fastener is located in the counterbore. When the connection hole is a general hole, the head of the fourth fastener is located outside the connection hole and presses on the outside of the seal protection member 6. The fourth connection threaded hole can be set as a blind hole.

[0036] Embodiment III

[0037] Basically as shown in the appendix Figures 6-7 : The window structure of the liquid level gauge includes a transparent member 23, a sealing and protecting member 6, and a fixing assembly. The transparent member 23 is specifically made of glass. The hub 2 is installed inside the upper side of the liquid level gauge body 1; a window 5 is provided on the liquid level gauge body 1, and a flared opening for installing the transparent member 23 is provided outside the window 5. The fixing assembly is used to fix the transparent member 23 in the flared opening, and an avoidance hole is provided on the fixing assembly, and the avoidance hole does not block the window 5; the sealing and protecting member 6 is installed on the side of the fixing assembly away from the window 5, and the sealing and protecting member 6 is detachably connected to the liquid level gauge body 1; through the transparent member 23 and the window 5, the float 3, the hub 2 and the steel wire 4 inside the liquid level gauge body 1 can be observed.

[0038] The fixing assembly includes a fourth fixing member 19, an eighth sealing member 20, a ninth sealing member 21, and a tenth sealing member 22. The eighth sealing member 20, the ninth sealing member 21, and the tenth sealing member 22 are all made of gaskets. A second internal thread is provided on the side of the flared opening away from the liquid level gauge body 1, and a second external thread matching the second internal thread is provided on the fourth fixing member 19. The fourth fixing member 19 can be threadedly connected into the flared opening; the diameter of the transparent member 23 matches the diameter of the flared opening, and the transparent member 23 is installed in the flared opening and can be pressed between the fourth fixing member 19 and the bottom of the flared opening. An eighth sealing member 20 is installed between the bottom of the flared opening and the transparent member 23, and a ninth sealing member 21 is installed between the transparent member 23 and the fourth fixing member 19. A third external thread is provided on the outside of the liquid level gauge body 1. The sealing and protecting member 6 is of a concave structure, and a third internal thread matching the third external thread is provided in the groove of the concave structure. The sealing and protecting member 6 is fixed to the liquid level gauge body 1 through the third internal thread and the third external thread. A tenth sealing member 22 is installed between the groove of the sealing and protecting member 6 and the outer end of the liquid level gauge body 1.

[0039] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device.

[0040] The above are only embodiments of the present utility model. Common general knowledge such as the specific structures and characteristics known in the art are not described in detail herein. Those of ordinary skill in the art know all the common general knowledge in the technical field to which the utility model belongs before the filing date or the priority date, are able to know all the prior art in this field, and have the ability to apply the conventional experimental means before this date. Those of ordinary skill in the art can, under the inspiration given in this application, combine their own abilities to complete and implement this solution. Some typical well-known structures or well-known methods should not become obstacles for those of ordinary skill in the art to implement this application. It should be noted that for those skilled in the art, without departing from the structure of the present utility model, several deformations and improvements can still be made, and these should also be regarded as the protection scope of the present utility model, and these will not affect the implementation effect of the present utility model and the practicality of the patent. The protection scope claimed in this application shall be subject to the content of its claims, and the specific implementation manners and the like recorded in the specification can be used to interpret the content of the claims.

Claims

1. Liquid level gauge window structure, characterized in that: It includes a transparent member (23), a sealing and protecting member (6) and a fixing assembly. The wheel hub (2) is installed inside the upper side of the liquid level gauge body (1); a window (5) is provided on the liquid level gauge body (1), and the fixing assembly is used to install the transparent member (23) in the window (5) of the liquid level gauge body (1). An avoidance hole is provided on the fixing assembly, and the avoidance hole does not block the window (5); the sealing and protecting member (6) is installed on the side of the fixing assembly away from the window (5), and the sealing and protecting member (6) is detachably connected to the fixing assembly or the liquid level gauge body (1); through the transparent member (23) and the window (5), the float (3), the wheel hub (2) and the steel wire (4) inside the liquid level gauge body (1) can be observed.

2. The liquid level gauge window structure according to claim 1, characterized in that: An flared opening for installing the transparent member (23) is provided outside the window (5), and the fixing assembly is used to fix the transparent member (23) in the flared opening.

3. The window structure of the liquid level gauge according to claim 2, characterized in that: The fixing assembly includes a first fixing member (7), a first sealing member (8), a second sealing member (9) and a third sealing member (10). The diameter of the transparent member (23) matches the diameter of the flared opening. The first sealing member (8) is located between the transparent member (23) and the bottom of the flared opening. The second sealing member (9) is located between the first fixing member (7), the transparent member (23) and the liquid level gauge body (1); the outer sides of the transparent member (23) and the liquid level gauge body (1) are flush, and the end face of the second sealing member (9) can press on the end faces of the transparent member (23) and the liquid level gauge body (1); the first fixing member (7) presses the first sealing member (8) and the transparent member (23) tightly in the flared opening and presses the second sealing member (9) tightly on the liquid level gauge body (1) and the transparent member (23); the first fixing member (7) is located outside the liquid level gauge body (1) and is fixed to the liquid level gauge body (1) by a first fastener; avoidance holes are provided on the first sealing member (8), the second sealing member (9) and the first fixing member (7).

4. The liquid level gauge window structure according to claim 3, wherein: A third sealing member (10) is installed between the sealing and protecting member (6) and the first fixing member (7), and the sealing and protecting member (6) and the first fixing member (7) are fixed by a second fastener.

5. The liquid level gauge window structure according to claim 2, characterized in that: The fixing component includes a second fixing member (11), a third fixing member (12), a fourth sealing member (13), a fifth sealing member (14) and a sixth sealing member (15). The second fixing member (11) is of a convex structure. A first through hole is provided at the protruding end (16) of the second fixing member (11). A second through hole (24) which is opposite to and communicated with the first through hole is provided at the bottom end (17) of the second fixing member (11). The diameter of the first through hole is larger than that of the second through hole (24). The diameter of the transparent member (23) matches that of the first through hole. The outer diameter of the protruding end (16) of the second fixing member (11) matches the diameter of the flared opening. The outer diameter of the bottom end (17) of the second fixing member (11) is larger than the diameter of the flared opening. The diameter of the second through hole (24) is not less than the diameter of the window (5). A first internal thread is provided on one side of the first through hole away from the second through hole (24). A first external thread which matches the first internal thread is provided on the outer side of the third fixing member (12). The third fixing member (12) can be threadedly connected in the first through hole. The transparent member (23) is installed in the first through hole and can be pressed between the third fixing member (12) and the inner bottom of the second fixing member (11). The length of the protruding end (16) of the second fixing member (11) is less than the depth of the flared opening. A fourth sealing member (13) is provided between the third fixing member (12) and the transparent member (23). A fifth sealing member (14) is installed between the transparent member (23) and the inner bottom of the second fixing member (11). A sixth sealing member (15) is installed between the bottom end (17) of the second fixing member (11) and the liquid level gauge body (1). The bottom end (17) of the second fixing member (11) is located outside the liquid level gauge body (1) and is fixed to the liquid level gauge body (1) by a third fastener. Avoidance holes are provided on the third fixing member (12), the fourth sealing member (13) and the fifth sealing member (14).

6. The liquid level gauge window structure according to claim 5, characterized in that: A seventh sealing member (18) is installed between the sealing and protecting member (6) and the second fixing member (11). The sealing and protecting member (6) and the second fixing member (11) are fixed by a fourth fastener.

7. The liquid level gauge window structure according to claim 2, characterized in that: The fixing component includes a fourth fixing member (19), an eighth sealing member (20) and a ninth sealing member (21). A second internal thread is provided on one side of the flared opening away from the liquid level gauge body (1). A second external thread which matches the second internal thread is provided on the fourth fixing member (19). The fourth fixing member (19) can be threadedly connected in the flared opening. The diameter of the transparent member (23) matches the diameter of the flared opening. The transparent member (23) is installed in the flared opening and can be pressed between the fourth fixing member (19) and the bottom of the flared opening. An eighth sealing member (20) is installed between the bottom of the flared opening and the transparent member (23). A ninth sealing member (21) is installed between the transparent member (23) and the fourth fixing member (19).

8. The window structure of the liquid level gauge according to claim 7, characterized in that: The outer side of the liquid level gauge body (1) is provided with a third external thread. The sealing and protecting member (6) has a concave structure. A third internal thread matching the third external thread is provided in the groove of the concave structure. The sealing and protecting member (6) is fixed to the liquid level gauge body (1) through the third internal thread and the third external thread.

9. The liquid level gauge window structure according to claim 8, wherein: A tenth sealing member (22) is installed between the groove of the sealing and protecting member (6) and the outer end of the liquid level gauge body (1).

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