Glass plate liquid level meter easy to maintain

Abstract

The invention discloses an easy-to-maintain glass plate liquid level meter, and relates to the technical field of liquid level meters, the easy-to-maintain glass plate liquid level meter comprises a glass display unit, a glass box, a supporting part arranged on the side part of the glass box, and a locking part arranged on the side wall of the supporting part; the protection unit comprises a scale metal plate arranged on the outer side of the glass box, a rotating shaft arranged on one side of the scale metal plate, and shifting plates vertically and rotatably arranged at the two ends of the side wall of the rotating shaft; the rotating shaft is rotationally embedded into the supporting part, and the shifting plate is stopped in the rotating shaft by the locking part; the two liquid guide units comprise valve bodies arranged at the bottom end and the top end of the side wall of the glass box in a communicating mode and scraping parts arranged in the valve bodies; the scale metal plate and the shifting plate synchronously rotate, so that the two sets of scraping components are synchronously pushed to clean impurities in the valve body in a labor-saving mode, and the scale metal plate is rotated, and the shifting plate abuts against the scraping components to effectively clean attachments on the inner wall of the valve body in the liquid guiding state of the valve body.

Description

Technical Field

[0001] The invention relates to the technical field of liquid level gauges, in particular to a glass plate liquid level gauge which is easy to maintain. Background Art

[0002] As a common liquid level measuring device, glass plate level gauge is widely used in chemical, petroleum, pharmaceutical and other industrial fields to visually display the liquid level in the container. Its basic structure usually includes an outer cover, a main pipe and a glass plate, in which the glass plate is used as an observation window, and the liquid level can be visually monitored through the observation hole on the outer cover.

[0003] In the prior art, in order to improve the reliability of glass plate liquid level gauges, a variety of improvement schemes have been proposed. For example, patent CN119413249A discloses a "glass plate liquid level gauge and liquid level measurement method". The technical scheme includes an outer cover, a main pipe and a glass plate. The main pipe is provided with a plurality of inclined annular grooves, and the cross section of the annular groove is designed to be low in the middle and high on both sides. This structure enables the liquid to flush the surface of the glass plate during the flow process, reducing the adhesion of impurities, thereby maintaining the clarity of the glass plate and ensuring the accuracy of the liquid level measurement.

[0004] However, this technical solution still has the following shortcomings: In actual use, particles in the liquid medium tend to accumulate at the inlet and outlet pipes, especially at the inlet pipe, where particles are more likely to adhere due to changes in the liquid flow rate and direction. Over time, these deposits will gradually clog the pipes, affecting the normal flow of the liquid, and thus reducing the measurement accuracy of the level meter. When particles accumulate seriously in the pipe, the level meter needs to be disassembled for cleaning, which increases maintenance costs and time costs.

[0005] Therefore, an improved glass plate liquid level gauge is needed, which can effectively solve the problem of particle accumulation at the liquid inlet pipe and the liquid outlet pipe and simplify the maintenance process. Summary of the invention

[0006] The object of the present invention is to provide a glass plate liquid level gauge which is easy to maintain, so as to solve the problems in the prior art.

[0007] To achieve the above object, the present invention provides the following technical solution: an easy-to-maintain glass plate level gauge, comprising: a glass display unit, including a glass box, a support component arranged on the side of the glass box, and a locking component arranged on the side wall of the support component; The protection unit includes a scale metal plate arranged outside the glass box, a rotating shaft arranged on one side of the scale metal plate, and a toggle plate arranged vertically on both ends of the side wall of the rotating shaft; the rotating shaft is rotatably embedded in the supporting component, and the locking component stops the toggle plate in the rotating shaft; The liquid guiding unit is provided with two groups, including a valve body connected to the bottom and top ends of the side wall of the glass box, and a scraping component arranged in the valve body; the scale metal plate rotates independently to expose the glass box for easy cleaning; the scale metal plate rotates synchronously with the toggle plate to push the two groups of scraping components synchronously to clean impurities in the valve body with effortless pushing.

[0008] Preferably, the supporting component comprises folding plates arranged at both ends of the side wall of the glass box, and a restraining tube arranged at the end of the folding plate; the locking component comprises a middle tube body arranged at the side wall of the restraining tube, a spring rod vertically slidably arranged in the middle tube body, and a locking ring arranged at the end of the spring rod; The rotating shaft is rotatably embedded in the restraining tube. Two sets of retaining rings are arranged on the top and bottom of the outer wall of the rotating shaft. The two sets of retaining rings are respectively arranged at two ends of the restraining tube.

[0009] Preferably, the top and bottom of the rotating shaft are provided with receiving grooves, one end of the toggle plate is rotated and placed in the receiving groove, and a torsion spring is installed at the rotating connection of the toggle plate to drive it to rotate out; when the locking ring is placed outside the receiving groove, the locking ring stops and positions the toggle plate.

[0010] Preferably, the valve body includes an operating hand wheel, a drive shaft fixed to the end of the operating hand wheel, a stud fixed to the end of the drive shaft, a main flow pipe threadedly mounted on the outside of the stud, a flange disposed at the end of the main flow pipe, and a secondary flow pipe vertically connected to the side of the main flow pipe; The main guide pipe is provided with a first guide cavity and a second guide cavity, the stud is threadedly installed in the first guide cavity, the end of the drive shaft axially slides and extends into the first guide cavity, and a ball is placed in the second guide cavity, and the ball is used to block the through hole of the flange; the adjacent ends of the first guide cavity and the second guide cavity are tapered, and the first guide cavity and the second guide cavity are connected through the middle cavity; a rectangular groove is provided on the upper surface of the outer end of the drive shaft; The scraper member slides axially through the drive shaft and the stud.

[0011] Preferably, the scraping member comprises a rectangular push block axially slidably arranged in the rectangular groove, a push rod axially slidably arranged in the drive shaft and the stud, a support spring placed in the rectangular groove, and a scraping ring arranged at the end of the push rod; The support spring is sleeved on the outside of the push rod and placed on the inner side of the rectangular push block. One end of the push rod is vertically fixedly connected to the rectangular push block, and the other end extends outward from the stud. The extended end of the push rod is fixedly connected to the scraper ring, and the scraper ring is slidably arranged in the second guide cavity to clean the attachments on the inner wall of the second guide cavity.

[0012] Preferably, the inner diameter of the scraper ring is not less than the outer diameter of the ball, the extended end of the push rod is connected to the scraper ring via an arc arm, and the radius of the arc arm is not less than the radius of the ball.

[0013] Preferably, the surface of the extended portion of the push rod is vertically provided with strips; The scraping component also includes a sleeve axially slidably clamped on the extended part of the push rod, and a scraper arranged on the outer wall of the sleeve, and the scraper is placed in the middle cavity; when the stud rotates, the scraper cleans the middle cavity and the attachments on both sides thereof.

[0014] Preferably, an observation window is provided on the surface of the scale metal plate, and an elastic clip is provided on the other side of the scale metal plate, and the end of the elastic clip is arc-shaped.

[0015] Preferably, the top of the glass box is open and a sealing plate is detachably installed, a glass tube is arranged at the center of the sealing plate, the glass tube extends into the interior of the glass box, and a lamp tube is arranged inside the glass tube.

[0016] Preferably, a bottom plate is provided at the bottom end of the outer wall of the glass tube.

[0017] Compared with the prior art, the present invention has the following beneficial effects: The coordinated design of the graduated metal plate, the toggle plate and the scraping component of the present invention can realize that when the valve body is in the liquid guiding state, the graduated metal plate can be rotated, and the toggle plate can contact the scraping component to effectively clean the attachments on the inner wall of the valve body. The cleaning process is labor-saving and convenient, and the upper and lower valve bodies can be cleaned at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the structure of the glass plate level gauge which is easy to maintain according to the present invention in an assembled state; Figure 2 It is a schematic diagram of the overall structure of the glass plate liquid level gauge which is easy to maintain according to the present invention; Figure 3 This is a schematic diagram of the structure of the protection unit of the present invention; Figure 4 This is a schematic diagram of the structure of the glass display unit of the present invention; Figure 5 This is a structural schematic diagram of the present invention in which the toggle plate is retracted into the receiving groove; Figure 6 This is a schematic diagram of the internal structure of the glass box of the present invention; Figure 7 It is a schematic diagram of the internal cross-sectional structure of the valve body of the present invention; Figure 8 It is a schematic diagram of the structure of the scraping component of the present invention; Fig. 9 It is a schematic diagram of the structure of the scale metal plate in the rotating state of the present invention.

[0019] Reference numerals: 100. Liquid tank; 200, liquid guide unit, 201, flange, 202, main guide pipe, 2021, first guide cavity, 2022, second guide cavity, 2023, middle cavity, 203, drive shaft, 2031, rectangular groove, 204, operating hand wheel, 205, auxiliary guide pipe, 206, rectangular push block, 207, ball bearing, 208, stud, 209, push rod, 210, support spring, 211, strip, 212, sleeve, 213, scraper, 214, arc arm, 215, scraper ring, 300, glass display unit, 301, glass box, 302, folding plate, 303, restraining tube, 304, middle tube body, 305, spring rod, 306, locking ring, 307, sealing plate, 308, glass tube, 309, lamp tube, 310, bottom plate, 400. Protection unit; 401. Scale metal plate; 402. Observation window; 403. Elastic clip; 404. Toggle plate; 405. Rotating shaft; 406. Retaining ring; 407. Accommodating groove; 408. Torsion spring. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] Embodiment: The present invention provides a technical solution for a glass plate level gauge that is easy to maintain, such as Figure 1-Figure 9 As shown, it includes: a glass display unit 300, including a glass box 301, a supporting component arranged on the side of the glass box 301, and a locking component arranged on the side wall of the supporting component; a protective unit 400, including a scale metal plate 401 arranged on the outside of the glass box 301, a rotating shaft 405 arranged on one side of the scale metal plate 401, and a toggle plate 404 arranged at both ends of the side wall of the rotating shaft 405 for vertical rotation; the rotating shaft 405 is rotatably embedded in the supporting component, and the locking component stops the toggle plate in the rotating shaft 405; a liquid guide unit 200, which is provided with two groups, including a valve body connected to the bottom and top ends of the side wall of the glass box 301, and a scraping component arranged in the valve body; the scale metal plate 401 rotates independently to expose the glass box 301 to facilitate cleaning; the scale metal plate 401 and the toggle plate 404 rotate synchronously, so as to save effort and synchronously push the two groups of scraping components to clean impurities in the valve body.

[0022] The glass box 301 is a main liquid storage structure, which is connected to the liquid tank 100 .

[0023] like Figure 4As shown, the purpose of the support component is to support the protection unit 400 so that the protection unit 400 can rotate freely; specifically, the support component includes folding plates 302 arranged at both ends of the side wall of the glass box 301, and a restraining tube 303 arranged at the end of the folding plate 302. The folding plate 302 is L-shaped, and the restraining tube 303 is a round tube. The folding plate 302 fixes the restraining tube 303 to the side of the glass box 301.

[0024] like Figure 3 As shown, the purpose of setting the locking component is to lock the toggle plate 404 so that the toggle plate 404 can be stored in the rotating shaft 405 when not in use; specifically, the locking component includes a middle tube body 304 arranged on the side wall of the constraint tube 303, a spring rod 305 vertically slidably arranged in the middle tube body 304, and a locking ring 306 arranged at the end of the spring rod 305; the rotating shaft 405 is rotatably embedded in the constraint tube 303, and two sets of retaining rings 406 are provided on the top and bottom of the outer wall of the rotating shaft 405, and the two sets of retaining rings 406 are respectively arranged at both ends of the constraint tube 303. The rotating shaft 405 can rotate in the constraint tube 303, and the spring rod 305 can slide axially in the middle tube body 304; the spring rod 305 is usually in an extended state, and it can push the locking ring 306 to slide on the outside of the toggle plate 404, so that the toggle plate 404 can be stopped to reduce the occupied space, and it is also convenient for the toggle plate 404 not to collide with the scraping component when only the glass box 301 is cleaned; the setting of the retaining ring 406 can constrain and position the constraint tube 303, so that the constraint tube 303 is rotated and set at a specified position.

[0025] The scale metal plate 401 can protect the glass box 301 from impact and prevent the glass box 301 from being damaged; specifically, an observation window 402 is provided on the surface of the scale metal plate 401, and an elastic clip 403 is provided on the other side of the scale metal plate 401, and the end of the elastic clip 403 is arc-shaped. The observer can see the liquid in the glass box 301 through the observation window 402, and then understand the current liquid level with the help of the scale on the scale metal plate 401; the elastic clip 403 can be elastically clamped on the side of the glass box 301 when the scale metal plate 401 does not rotate, so as to position the scale metal plate 401; after long-term use, dust will adhere to the outer wall of the glass box 301, which will also affect the observation effect. The worker can rotate the scale metal plate 401 to one side, and at this time, the toggle plate 404 is retracted, so that the front of the glass box 301 can be exposed, which is convenient for the worker to wipe and clean.

[0026] The setting of the toggle plate 404 can resist the action of the scraping component when the scale metal plate 401 rotates, so that the upper and lower groups of scraping components can synchronously and labor-savingly complete the cleaning of the valve body. Specifically, the toggle plate 404 is a long strip plate, and the top and bottom of the rotating shaft 405 are provided with a receiving groove 407. One end of the toggle plate 404 is rotated and placed in the receiving groove 407. The rotating connection of the toggle plate 404 is installed with a torsion spring 408 to drive it to rotate out; when the locking ring 306 is placed outside the receiving groove 407, the locking ring 306 stops and positions the toggle plate 404. When the toggle plate 404 is not in use, it is stored in the receiving groove 407. When the locking ring 306 is lifted, the toggle plate 404 can be driven by the torsion spring 408 to quickly rotate vertically and pop out, and rotate from a vertical state to a horizontal state, so as to facilitate subsequent rotation and resistance work.

[0027] The scraping component can clean the attachments from the inside of the valve body, so that the attachments are guided into the glass box 301 along with the liquid, thereby solving the problem of impurities blocking the liquid precision. The cleaning process does not require the valve body to be disassembled, and only the scale metal plate 401 needs to be rotated, which is easy to operate and efficient in cleaning. Specifically, the valve body includes an operating hand wheel 204, a driving shaft 203 fixedly arranged at the end of the operating hand wheel 204, a stud 208 fixedly arranged at the end of the driving shaft 203, and a main threaded sleeve on the outside of the stud 208. The guide pipe 202 includes a flange 201 disposed at the end of the main guide pipe 202, and a secondary guide pipe 205 vertically connected to the side of the main guide pipe 202; the main guide pipe 202 has a first guide cavity 2021 and a second guide cavity 2022 formed inside, a stud 208 is threadedly installed in the first guide cavity 2021, an end of the drive shaft 203 axially slides into the first guide cavity 2021, and a ball 207 is placed inside the second guide cavity 2022, and the ball 207 is used to seal The through hole of the flange 201; the adjacent ends of the first guide cavity 2021 and the second guide cavity 2022 are conical, and the first guide cavity 2021 and the second guide cavity 2022 are connected through the intermediate cavity 2023; a rectangular groove 2031 is provided on the upper surface of the outer end of the driving shaft 203; the scraping component axially slides through the driving shaft 203 and the stud 208; rotating the operating hand wheel 204 can drive the stud 208 to rotate axially along the first guide cavity 2021 through the driving shaft 203, and the valve body opens When the valve body is closed, the stud 208 rotates to the inner end of the first flow guide cavity 2021, and the push rod 209 contacts the ball 207 to block the flange 201, thereby completing the blockage.

[0028] like Figure 7 and Figure 8As shown, in order to enable the scraping component to complete the cleaning of the second guide cavity 2022, specifically, the scraping component includes a rectangular push block 206 axially slidably arranged in the rectangular groove 2031, a push rod 209 axially slidably arranged in the drive shaft 203 and the stud 208, a support spring 210 placed in the rectangular groove 2031, and a scraper ring 215 arranged at the end of the push rod 209; the support spring 210 is sleeved on the outside of the push rod 209 and placed on the inner side of the rectangular push block 206, one end of the push rod 209 is vertically fixedly connected to the rectangular push block 206, and the other end extends outward from the stud 208, the extended end of the push rod 209 is fixedly connected to the scraper ring 215, and the scraper ring 215 is slidably arranged in the second guide cavity 2022 to clean the attachments on the inner wall of the second guide cavity 2022. The technical effects brought are as follows: 1. When cleaning impurities in the valve body open state, the toggle plate 404 rotates to resist the rectangular push block 206, and then the rectangular push block 206 slides in the rectangular groove 2031, pushing the push rod 209 to move inward and compress the support spring 210, and the push rod 209 can resist the scraper ring 215 to reciprocate in the second guide cavity 2022, thereby cleaning the attachments on the inner wall of the second guide cavity 2022, and realizing the cleaning of the second guide cavity 2022 in the liquid guiding state; 2. When the operating hand wheel 204 is rotated, the rectangular groove 2031 can resist the rectangular push block 206 to rotate, so that the push rod 209 pushes the ball 207 to close the valve body, thereby ensuring that the normal pushing and closing action can be completed normally; 3. In some scenarios where the liquid level meter needs to be temporarily closed. , the toggle plate 404 contacts the rectangular push block 206, so that the push rod 209 and the scraper ring 215 can contact the ball 207 to close the flange 201, so that the temporary closing effect can be achieved, and there is no need to turn the operating hand wheel 204. On the one hand, this is more labor-saving. Some operating hand wheels 204 require the help of a wrench to turn. On the other hand, it is closed by the push rod 209 alone, and there is no need to change the position of the stud 208. The position of the stud 208 determines the liquid flow rate; 4. Whether the valve body is closed by the operating hand wheel 204 or by the rectangular push block 206, the scraper ring 215 can increase the contact area with the ball, so that the ball 207 is more smoothly in the middle, completing the resistance work. Compared with the traditional single push rod 209 resistance, the blocking is smoother.

[0029] Furthermore, the inner diameter of the scraper ring 215 is not less than the outer diameter of the ball 207, the extended end of the push rod 209 is connected to the scraper ring 215 through the arc arm 214, and the radius of the arc arm 214 is not less than the radius of the ball 207; the exemplary inner diameter of the scraper ring 215 is the same as the outer diameter of the ball 207, and the radius of the arc arm 214 is the same as the radius of the ball 207. The design of the scraper ring 215 and the arc arm 214 can make the contact and cooperation between the ball 207 and the scraper ring 215 smoother, and the final sealing fit is tighter.

[0030] In order to enable the scraping component to clean the middle cavity 2023, specifically, a strip 211 is vertically provided on the surface of the protruding part of the push rod 209; the scraping component also includes a sleeve 212 axially slidably mounted on the protruding part of the push rod 209, and a scraper 213 provided on the outer wall of the sleeve 212, and the scraper 213 is placed in the middle cavity 2023; when the stud 208 rotates, the scraper 213 cleans the middle cavity 2023 and the attachments on both sides thereof. When the stud 208 rotates, it can drive the push rod 209 to slide axially in the sleeve 212 and drive the sleeve 212 to rotate through the strip 211, thereby driving the scraper 213 to rotate, and the scraper 213 can scrape the attachments in the middle cavity 2023; the scraper 213 can cover the inner wall of the middle cavity 2023 and the tapered parts on both sides; when the push rod 209 moves axially alone, the scraper 213 does not rotate to work.

[0031] like Figure 6 As shown, as an embodiment, in order to solve the problem of inconvenient observation of the glass level gauge in the area with insufficient brightness, the following solution is given: the top of the glass box 301 is open and a sealing plate 307 is detachably installed, a glass tube 308 is provided at the center of the sealing plate 307, the glass tube 308 extends into the interior of the glass box 301, and a lamp tube 309 is provided inside the glass tube 308. The sealing plate 307 is screwed and covered on the top of the glass box 301. When the sealing plate 307 is covered, the glass tube 308 can be inserted into the glass box 301. A battery compartment can be built in the top of the glass tube 308, and the battery compartment supplies power to the lamp tube 309. When the liquid in the glass box 301 is not clearly visible or the particle concentration and suspension state of the liquid are to be observed, the lamp tube 309 can be turned on, so that the glass box 301 can be illuminated from the inside, which is easier to observe; the convex column can be inserted into the inlet of the sewage valve to enhance the sealing of the sewage outlet.

[0032] Specifically, a bottom plate 310 is provided at the bottom end of the outer wall of the glass tube 308. When the glass tube 308 is inserted, the bottom plate 310 is located below the glass box 301, and particles in the liquid fall on the bottom plate 310; when cleaning the glass box 301, the glass tube 308 can be removed and pulled up, and the bottom plate 310 moves up and scrapes off the attachments on the inner wall of the glass box 301. The cleaned attachments fall on the bottom plate 310 and will not enter the glass box 301. In this way, the glass box 301 can be quickly cleaned. At the same time, there is no need to set a drain valve at the bottom of the glass box 301 like the traditional solution. The sealing performance of the drain valve decreases after a period of use, and there is a risk of leakage. The design of the bottom plate 310 can solve this problem.

[0033] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A glass plate level gauge that is easy to maintain, characterized in that: include: A glass display unit (300) comprises a glass box (301), a supporting component arranged on the side of the glass box (301), and a locking component arranged on the side wall of the supporting component; The protection unit (400) comprises a graduated metal plate (401) arranged outside the glass box (301), a rotating shaft (405) arranged on one side of the graduated metal plate (401), and a toggle plate (404) arranged vertically at both ends of the side walls of the rotating shaft (405); the rotating shaft (405) is rotatably embedded in the supporting component, and the locking component stops the toggle plate (404) in the rotating shaft (405); The liquid guiding unit (200) is provided with two groups, including a valve body connected to the bottom and top ends of the side wall of the glass box (301), and a scraping component provided in the valve body; the graduated metal plate (401) rotates independently to expose the glass box (301) for easy cleaning; the graduated metal plate (401) rotates synchronously with the toggle plate (404), so as to save effort and synchronously push the two groups of scraping components to clean impurities in the valve body.

2. The glass plate liquid level gauge that is easy to maintain according to claim 1, characterized in that: The supporting component comprises folding plates (302) arranged at both ends of the side walls of the glass box (301), and a restraining tube (303) arranged at the end of the folding plate (302); the locking component comprises a middle tube body (304) arranged at the side wall of the restraining tube (303), a spring rod (305) vertically slidably arranged in the middle tube body (304), and a locking ring (306) arranged at the end of the spring rod (305); The rotating shaft (405) is rotatably embedded in the restraining tube (303), and two sets of retaining rings (406) are provided at the top and bottom of the outer wall of the rotating shaft (405), and the two sets of retaining rings (406) are respectively arranged at both ends of the restraining tube (303).

3. The glass plate liquid level gauge that is easy to maintain according to claim 2, characterized in that: The top and bottom of the rotating shaft (405) are both provided with receiving grooves (407), one end of the toggle plate (404) is rotatably placed in the receiving groove (407), and a torsion spring (408) is installed at the rotating connection of the toggle plate (404) for driving the toggle plate (404) to rotate out; when the locking ring (306) is placed outside the receiving groove (407), the locking ring (306) stops and positions the toggle plate (404).

4. The glass plate liquid level gauge that is easy to maintain according to claim 3, characterized in that: The valve body comprises an operating hand wheel (204), a driving shaft (203) fixedly mounted on the end of the operating hand wheel (204), a stud (208) fixedly mounted on the end of the driving shaft (203), a main flow guide pipe (202) threadedly mounted on the outside of the stud (208), a flange (201) disposed on the end of the main flow guide pipe (202), and a secondary flow guide pipe (205) vertically connected to the side of the main flow guide pipe (202); A first flow guide cavity (2021) and a second flow guide cavity (2022) are provided inside the main flow guide tube (202); a stud (208) is threadedly installed in the first flow guide cavity (2021); an end portion of the drive shaft (203) slides axially and extends into the first flow guide cavity (2021); a ball (207) is placed inside the second flow guide cavity (2022); the ball (207) is used to seal the through hole of the flange (201); the adjacent ends of the first flow guide cavity (2021) and the second flow guide cavity (2022) are conical, and the first flow guide cavity (2021) and the second flow guide cavity (2022) are connected via an intermediate cavity (2023); a rectangular groove (2031) is provided on the upper surface of the outer end of the drive shaft (203); The scraper member slides axially through the drive shaft (203) and the stud (208).

5. The glass plate liquid level gauge that is easy to maintain according to claim 4, characterized in that: The scraping component comprises a rectangular push block (206) axially slidably disposed in the rectangular groove (2031), a push rod (209) axially slidably disposed in the drive shaft (203) and the stud (208), a support spring (210) disposed in the rectangular groove (2031), and a scraping ring (215) disposed at the end of the push rod (209); The support spring (210) is sleeved on the outside of the push rod (209) and is placed on the inner side of the rectangular push block (206); one end of the push rod (209) is vertically fixedly connected to the rectangular push block (206) and the other end is extended outward from the stud (208); the extended end of the push rod (209) is fixedly connected to the scraper ring (215); the scraper ring (215) is slidably arranged in the second guide cavity (2022) to clean the attachments on the inner wall of the second guide cavity (2022).

6. The glass plate liquid level gauge that is easy to maintain according to claim 5, characterized in that: The inner diameter of the scraper ring (215) is not less than the outer diameter of the ball (207); the outwardly extending end of the push rod (209) is connected to the scraper ring (215) via an arc arm (214); and the radius of the arc arm (214) is not less than the radius of the ball (207).

7. The glass plate liquid level gauge that is easy to maintain according to claim 5, characterized in that: A strip (211) is vertically provided on the surface of the extended portion of the push rod (209); The scraping component also includes a sleeve (212) axially slidably mounted on the protruding portion of the push rod (209), and a scraper (213) disposed on the outer wall of the sleeve (212), wherein the scraper (213) is placed in the middle cavity (2023); when the stud (208) rotates, the scraper (213) cleans the middle cavity (2023) and attachments on both sides thereof.

8. The glass plate liquid level gauge that is easy to maintain according to claim 1, characterized in that: An observation window (402) is provided on the surface of the graduated metal plate (401), and an elastic clip (403) is provided on the other side of the graduated metal plate (401), wherein the end of the elastic clip (403) is arc-shaped.

9. The glass plate liquid level gauge that is easy to maintain according to claim 8, characterized in that: The top of the glass box (301) is open and has a detachable sealing plate (307) installed thereon. A glass tube (308) is provided at the center of the sealing plate (307). The glass tube (308) extends into the interior of the glass box (301). A lamp tube (309) is provided inside the glass tube (308).

10. The glass plate liquid level gauge that is easy to maintain according to claim 9, characterized in that: A bottom plate (310) is provided at the bottom end of the outer wall of the glass tube (308).

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