Multidirectional observation high temperature resistant liquid level meter

Abstract

This utility model discloses a high-temperature resistant level gauge for multi-directional liquid level observation, comprising a U-shaped cross-section shell, two plugs, a quartz tube, and a hollow bolt. The improvements are as follows: ① The front wall and two side walls of the shell are provided with axially extending observation holes, achieving three-way visibility from the front and both sides; ② The plugs are provided with a cavity, a vertical first insertion hole, and a horizontal second insertion hole. The quartz tube is inserted into the first insertion hole through a double-sealing ring structure at both ends. The sealing rings are made of fluororubber material and are resistant to high temperatures up to 200℃; ③ The hollow bolt passes through the mounting hole and the second insertion hole, and its radial flow hole connects the cavity to the oil tank; ④ The plugs are provided with recessed platforms and sealing rings at both ends, which, together with sealing convex rings, enhance the sealing performance; ⑤ High, medium, and low warning scale lines are printed on the surface of the quartz tube. The shell and quartz tube are detachably assembled in 100–800mm sections to accommodate oil tanks of different volumes. This utility model solves the problems of traditional level gauges, such as a single viewing angle, easy failure of high-temperature seals, and high customization costs.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic system technology, specifically to a high-temperature resistant liquid level gauge for multi-directional liquid level observation. Background Technology

[0002] As a key monitoring component in hydraulic systems, level gauges are widely used for indicating the liquid level and displaying the oil status in hydraulic tanks. In high-temperature environments such as those used in construction machinery and industrial hydraulic systems, traditional level gauges face the following technical bottlenecks:

[0003] ① Single observation angle: Most existing level gauges adopt a one-way observation window design. In scenarios where equipment space is limited or the installation location is special (such as a small compartment or an environment with many obstacles), it is difficult for operators to read the liquid level from the best angle. They need to frequently adjust the position, which reduces the monitoring efficiency.

[0004] ② Insufficient high temperature resistance: Conventional sealing materials (such as nitrile rubber) are prone to aging and deformation under continuous high temperature environment, which leads to seal failure, causing oil leakage and distorted liquid level indication. The risk is particularly significant when the hydraulic system is running for a long time.

[0005] ③ Poor adaptability and flexibility: For fuel tanks of different volumes, traditional solutions require customized design of the overall structure, resulting in high production costs, long delivery cycles, and increased complexity in spare parts management.

[0006] Therefore, there is an urgent need for a level gauge structure that combines high-temperature sealing stability, multi-directional visibility, and modular size to meet the stringent requirements of complex industrial scenarios. Utility Model Content

[0007] In order to overcome the above-mentioned defects of existing liquid level gauges, this utility model provides a high-temperature resistant liquid level gauge for multi-directional observation of liquid level.

[0008] The technical solution adopted by this utility model is as follows: A high-temperature resistant liquid level gauge for multi-directional observation of liquid level includes: a shell with a U-shaped cross-section, including a front wall and two symmetrical side walls, each of which has a through observation hole, and each of the two ends of the front wall has a mounting hole; two plugs, respectively installed at both ends of the shell, each plug having a cavity, a vertical first insertion hole and a horizontally penetrating second insertion hole, the first insertion hole and the second insertion hole being connected to the cavity; a quartz tube, disposed inside the shell, with both ends sealed and inserted into the two first insertion holes; and two hollow bolts, each having an axial center hole and a radially penetrating flow hole, the hollow bolts passing through the mounting hole and the second insertion hole in sequence, and being tightened and fixed to the hydraulic oil tank mounting surface by threaded connection, the flow hole being located inside the cavity.

[0009] Preferably, the observation hole is an elongated hole extending along the axial direction of the outer shell.

[0010] Preferably, the first insertion hole is a stepped hole, and a first sealing ring and a second sealing ring are provided between the quartz tube and the first insertion hole; the first sealing ring has an inner flange and is provided near the end of the quartz tube; the second sealing ring has an outer flange and is provided near the opening of the first insertion hole.

[0011] Preferably, the first sealing ring and the second sealing ring are made of fluororubber material.

[0012] Preferably, the plug has a first recess facing the mounting hole at the opening of the second socket, and a second recess facing the mounting surface of the hydraulic oil tank; a third sealing ring is installed in the first recess, and a fourth sealing ring is installed in the second recess.

[0013] Preferably, the second recess is provided with a plurality of sealing protrusions.

[0014] Preferably, the surface of the quartz tube is printed with three warning scale lines: high, medium, and low.

[0015] Preferably, the length combination of the outer shell and the quartz tube is a detachable connection of 100-800mm.

[0016] Preferably, the outer shell is an aluminum alloy extrusion or stamping part, and the plug is an aluminum alloy casting part.

[0017] This utility model has the following beneficial effects:

[0018] 1. Multi-view observation: The U-shaped shell with three-way observation holes breaks through the limitations of traditional one-way observation, allowing operators to observe the liquid level in the quartz tube from three directions: front, left and right. It is especially suitable for complex working conditions with limited installation space and obstructions. Liquid level information can be obtained quickly without adjusting the position, which significantly improves monitoring efficiency and operational safety.

[0019] 2. High-temperature sealing stability: The unique stepped hole double sealing ring structure has an inner flange near the end of the quartz tube to resist internal oil pressure impact, and an outer flange near the orifice to prevent external environmental corrosion. The fluororubber sealing material can withstand the continuous high temperature of the hydraulic system and has better anti-aging properties than nitrile rubber. It maintains the integrity of the seal under long-term use and avoids oil leakage and liquid level distortion caused by seal failure.

[0020] 3. Double concave seal on the plug: The third sealing ring isolates the interface between the outer shell and the plug, and the fourth sealing ring, together with the sealing convex ring, enhances the sealing of the oil tank mounting surface, forming multiple leak-proof barriers;

[0021] 4. Modular size adaptation: The outer shell and quartz tube are detachable and combinable in lengths of 100–800mm. Different capacity oil tanks can be adapted by replacing parts of different lengths without overall customization. The outer shell is a standardized extruded / stamped part, and the plug is a cast part, which greatly reduces processing costs and spare parts inventory complexity, and shortens the delivery cycle.

[0022] 5. Convenience: The quartz tube surface is printed with three levels of warning scales (high, medium, and low), which intuitively indicate the safe liquid level threshold and help operators quickly judge the oil level status. Attached Figure Description

[0023] Figure 1 This is a perspective view of an embodiment of the present utility model.

[0024] Figure 2 This is an exploded view of an embodiment of the present invention.

[0025] Figure 3 This is a front view schematic diagram of an embodiment of the present utility model.

[0026] Figure 4 This is a schematic cross-sectional view along line AA of an embodiment of the present invention.

[0027] Figure 5 This is a schematic diagram of the plug in an embodiment of this utility model.

[0028] 1-Outer shell, 1.1-Front wall, 1.2-Side wall, 1.3-Observation hole, 1.4-Mounting hole;

[0029] 2-Plug, 2.1-Cavity, 2.2-First socket, 2.3-Second socket, 2.4-First recess, 2.5-Second recess, 2.6-Sealing protrusion;

[0030] 3-Quartz tube, 3.1-Warning scale line;

[0031] 4-Hollow bolt, 4.1-Axial center hole, 4.2-Flow hole;

[0032] 5 - First sealing ring;

[0033] 6-Second sealing ring;

[0034] 7-Third sealing ring;

[0035] 8 - Fourth sealing ring. Detailed Implementation

[0036] The present invention will be further described below with reference to the embodiments and accompanying drawings.

[0037] In the embodiments, such as Figures 1-5As shown, a high-temperature resistant liquid level gauge for multi-directional liquid level observation includes: a housing 1 with a U-shaped cross-section, comprising a front wall 1.1 and two symmetrical side walls 1.2, with through observation holes 1.3 on both the front wall 1.1 and the two side walls 1.2, and a mounting hole 1.4 at each end of the front wall 1.1; two plugs 2, respectively installed at both ends of the housing 1, each plug 2 having a cavity 2.1, a vertical first insertion hole 2.2, and a horizontally penetrating second insertion hole 2.3, both of which are connected to the cavity 2.1; a quartz tube 3, disposed inside the housing 1, with both ends sealed and inserted into the two first insertion holes 2.2; and two hollow bolts 4, each having an axial central hole 4.1 and a radially penetrating flow hole 4.2, the hollow bolts 4 passing through the mounting hole 1.4 and the second insertion hole 2.3 in sequence, and being tightened and fixed to the hydraulic oil tank mounting surface by threaded connection, the flow hole 4.2 being located inside the cavity 2.1. This embodiment employs a U-shaped outer shell 1, with observation holes 1.3 on all three walls (front wall 1.1 and side walls 1.2), enabling three-way observation from the front and both sides, completely eliminating blind spots. The cavity 2.1 of the plug 2 connects the first socket 2.2 and the second socket 2.3, ensuring that the oil enters the quartz tube 3 through the flow hole 4.2 of the hollow bolt 4, with no delay in liquid level response. The axial center hole 4.1 of the hollow bolt 4 mates with the mounting hole 1.4, and is directly fixed to the oil tank mounting surface by threaded tightening, ensuring a stable installation.

[0038] In the embodiments, such as Figures 1-4 As shown, observation hole 1.3 is an elongated hole extending along the axial direction of the outer casing 1. The longitudinal visible range of observation hole 1.3, extending along the axial direction of the outer casing 1, is essentially expanded to the entire length of the quartz tube 3, thus obtaining a larger observation range.

[0039] In the embodiments, such as Figure 2 , Figure 4 As shown, the first insertion hole 2.2 is a stepped hole, and two seals, a first sealing ring 5 and a second sealing ring 6, are provided between the quartz tube 3 and the first insertion hole 2.2. The first sealing ring 5 has an inner flange and is located near the end of the quartz tube 3; the second sealing ring 6 has an outer flange and is located near the opening of the first insertion hole 2.2. The first sealing ring 5, with its inner flange, fits tightly against the end of the quartz tube 3 to resist oil pressure impact and prevent internal leakage; the second sealing ring 6, with its outer flange, is located at the opening of the first insertion hole 2.2 to block external dust / moisture erosion; the two sealing rings achieve synergistic leak prevention.

[0040] In the embodiments, such as Figure 2 , Figure 4 As shown, the first sealing ring 5 and the second sealing ring 6 are made of fluororubber. Fluororubber can withstand extreme temperatures from -20℃ to 200℃, and its lifespan is three times longer than that of nitrile rubber. Moreover, its compression set at high temperatures is less than 10%, ensuring that the sealing force does not decrease at high temperatures.

[0041] In the embodiments, such as Figure 2 , Figure 4 , Figure 5 As shown, plug 2 has a first recess 2.4 facing mounting hole 1.4 at the opening of the second socket 2.3, and a second recess 2.5 facing the hydraulic oil tank mounting surface. A third sealing ring 7 is installed in the first recess 2.4, and a fourth sealing ring 8 is installed in the second recess 2.5. The third sealing ring 7 in the first recess 2.4 isolates the assembly gap between the outer shell 1 and plug 2, eliminating micro-leakage caused by vibration. The fourth sealing ring 8 in the second recess 2.5 compensates for the unevenness of the oil tank mounting surface, adapting to rough working conditions.

[0042] In the embodiments, such as Figure 5 As shown, the second recess 2.5 is provided with several sealing protrusions 2.6. The sealing protrusions 2.6 in the second recess 2.5 and the fourth sealing ring 8 form a multi-stage labyrinth seal, which extends the oil penetration path. Moreover, when the bolts are tightened, the protrusions 2.6 cut into the sealing ring to form a mechanical self-locking, which improves the vibration resistance.

[0043] In the embodiments, such as Figures 1-3 As shown, the surface of the quartz tube 3 is printed with three warning scale lines 3.1: high, medium, and low. The three warning scale lines 3.1 (H / M / L) can be distinguished by three colors, corresponding to critical liquid level, warning liquid level, and dangerous liquid level. In particular, the L scale line is marked in red, which intuitively indicates the safe liquid level threshold and helps operators quickly judge the oil level status.

[0044] In the embodiments, such as Figure 2 As shown, the length combination of the outer shell 1 and the quartz tube 3 is a detachable connection of 100-800mm. This mechanism can adjust the measuring range by replacing the outer shell 1 and the quartz tube 3, reducing the types of spare parts by 70%, reducing inventory costs, and achieving a length combination of 100-800mm, suitable for oil tanks from 5L to 2000L.

[0045] In this embodiment, the outer shell 1 is an aluminum alloy extrusion or stamping part, and the plug 2 is an aluminum alloy casting. The outer shell 1, made of aluminum alloy extrusion / stamping, has a simple processing technology, and maintains bending rigidity even with a wall thickness reduced to 1.2mm. The plug 2, also an aluminum alloy casting, features an integrally formed cavity 2.1 and a dual-hole structure, improving yield and facilitating assembly.

[0046] Obviously, the above embodiments of this utility model are merely examples for illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Other obvious variations or modifications derived from the essential spirit of the present utility model still fall within the protection scope of the present utility model.

Claims

1. A high-temperature resistant liquid level gauge for multi-directional liquid level observation, characterized in that, include: The outer shell (1) has a U-shaped cross-section and includes a front wall (1.1) and two symmetrical side walls (1.2). The front wall (1.1) and the two side walls (1.2) are provided with through observation holes (1.3). Each end of the front wall (1.1) is provided with a mounting hole (1.4). Two plugs (2) are respectively installed at both ends of the outer shell (1). Each plug (2) is provided with a cavity (2.1), a vertical first socket (2.2) and a horizontally penetrating second socket (2.3). The first socket (2.2) and the second socket (2.3) are both connected to the cavity (2.1). A quartz tube (3) is disposed inside the outer casing (1), and its two ends are respectively sealed and inserted into the two first insertion holes (2.2); Two hollow bolts (4) are provided with an axial center hole (4.1) and a radial through-flow hole (4.2). The hollow bolts (4) pass through the mounting hole (1.4) and the second insertion hole (2.3) in sequence, and are pressed and fixed to the hydraulic oil tank mounting surface by threaded connection. The through-flow hole (4.2) is located in the cavity (2.1).

2. The high-temperature resistant liquid level gauge for multi-directional liquid level observation according to claim 1, characterized in that, The observation hole (1.3) is an elongated hole extending along the axial direction of the outer shell (1).

3. The high-temperature resistant liquid level gauge for multi-directional liquid level observation according to claim 1 or 2, characterized in that, The first insertion hole (2.2) is a stepped hole. The quartz tube (3) and the first insertion hole (2.2) are provided with two seals: a first sealing ring (5) and a second sealing ring (6). The first sealing ring (5) has an inner flange and is located near the end of the quartz tube (3). The second sealing ring (6) has an outer flange and is located near the opening of the first insertion hole (2.2).

4. The high-temperature resistant liquid level gauge for multi-directional liquid level observation according to claim 3, characterized in that, The first sealing ring (5) and the second sealing ring (6) are made of fluororubber material.

5. The high-temperature resistant liquid level gauge for multi-directional liquid level observation according to claim 1 or 2, characterized in that, The plug (2) has a first recess (2.4) facing the mounting hole (1.4) at the opening of the second socket (2.3), and a second recess (2.5) facing the mounting surface of the hydraulic oil tank. A third sealing ring (7) is installed in the first recess (2.4), and a fourth sealing ring (8) is installed in the second recess (2.5).

6. The high-temperature resistant liquid level gauge for multi-directional liquid level observation according to claim 5, characterized in that, The second recess (2.5) is provided with several sealing protrusions (2.6).

7. The high-temperature resistant liquid level gauge for multi-directional liquid level observation according to claim 1, characterized in that, The surface of the quartz tube (3) is printed with three warning scale lines (3.1) of high, medium and low.

8. The high-temperature resistant liquid level gauge for multi-directional liquid level observation according to claim 1, characterized in that, The length combination of the outer shell (1) and the quartz tube (3) is 100-800mm detachable connection.

9. The high-temperature resistant liquid level gauge for multi-directional liquid level observation according to claim 1, characterized in that, The outer shell (1) is an aluminum alloy extrusion or stamping part, and the plug (2) is an aluminum alloy casting part.

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