A liquid level monitoring device for a high-pressure delivery system of a cutting fluid

Abstract

The utility model discloses a cutting fluid high pressure conveying system liquid level monitoring devices including box, be provided with filter equipment and high pressure conveying device in the box, be provided with water tank in the box, and the water tank is located the bottom of the box, and filter equipment and high pressure conveying device set up in the top of water tank, be provided with liquid level monitoring part on the water tank, and the liquid level monitoring part includes monitoring float ball, and monitoring float ball extends to the water tank. Through setting up the liquid level monitoring part by monitoring float ball, floating rod and a plurality of proximity switches in the water tank, the utility model can perceive the liquid level change of cutting fluid in the box in real time. When the liquid level is too low or too high, the corresponding proximity switch can be triggered, and the start and stop of the high pressure conveying device can be controlled in time, the problem of pump body idling, dry burning damage caused by too low liquid level is fundamentally avoided, the safety and stable operation of the core component of the high pressure conveying system are effectively guaranteed, and the service life of equipment is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of high-pressure cutting fluid delivery technology, and in particular to a liquid level monitoring device for a high-pressure cutting fluid delivery system. Background Technology

[0002] In the field of machining, especially in CNC machine tools and machining centers, cutting fluid is widely used for tool cooling, lubrication, cleaning, and rust prevention. Traditional high-pressure cutting fluid delivery systems typically use an open or semi-open reservoir as a storage and return container. This reservoir is characterized by its large volume and visible liquid level, allowing operators to directly observe the remaining cutting fluid level and replenish it promptly. Therefore, specialized liquid level monitoring equipment is usually unnecessary.

[0003] However, this traditional pool-style structure has several inherent drawbacks: First, it occupies a large area, requiring a dedicated foundation pit or ground space, making its layout inflexible for modern workshops with limited space, and its initial construction costs are high. Second, open pools easily lead to the evaporation of cutting fluid, causing not only air pollution in the working environment but also potential waste of the fluid. Furthermore, dust and debris from the external environment can easily fall into the pool, contaminating the cutting fluid and affecting machining quality and tool life.

[0004] To overcome the aforementioned shortcomings, the applicant conceived of an integrated structural solution combining the liquid storage tank with high-pressure delivery pumps and other equipment. This integrated tank structure is compact, highly mobile, and well-sealed, effectively solving the problems of traditional water tanks being bulky, easily contaminated, and prone to evaporation. However, this improvement also brings new technical challenges: because the tank is typically a sealed or semi-sealed structure, and its volume is much smaller than that of traditional water tanks, operators cannot visually monitor the internal liquid level as before. If the liquid level in the tank becomes too low and is not detected in time during continuous operation of the high-pressure pump, it will cause the pump to run dry, potentially damaging the expensive high-pressure pump and causing processing interruptions. Utility Model Content

[0005] Based on the above, the purpose of this utility model is to provide a liquid level monitoring device for a high-pressure cutting fluid delivery system, which can monitor the cutting fluid volume in real time and issue an alarm in time when the liquid level is too low, thereby ensuring the stable and safe operation of the high-pressure delivery system.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: This utility model provides a liquid level monitoring device for a high-pressure delivery system of cutting fluid, including a housing, a filter device and a high-pressure delivery device are installed inside the housing, a water tank is installed inside the housing and the water tank is located at the bottom of the housing, the filter device and the high-pressure delivery device are installed above the water tank, and a liquid level monitoring part is installed on the water tank, the liquid level monitoring part includes a monitoring float ball that extends into the water tank.

[0007] Preferably, the liquid level monitoring unit further includes a monitoring mounting plate, which is disposed on the top of the water tank. A monitoring fixing chassis is disposed on the monitoring mounting plate, and a monitoring hollow tube and a monitoring stabilizing rod are disposed on the monitoring fixing chassis. A monitoring fixing top plate is connected to the top of the monitoring hollow tube and the monitoring stabilizing rod. The monitoring hollow tube has a hollow structure and a floating rod is disposed inside the monitoring hollow tube. A sensing module is disposed on the top of the floating rod, and the bottom of the floating rod extends into the water tank and is connected to the monitoring float. When the monitoring float moves up and down with the liquid level change, the floating rod moves up and down accordingly. A first proximity switch is disposed on the top of the monitoring stabilizing rod, a second proximity switch is disposed on the bottom of the monitoring stabilizing rod, and a third proximity switch is disposed near the bottom of the monitoring stabilizing rod, with the third proximity switch located between the first and second proximity switches.

[0008] Preferably, the bottom of the monitoring mounting plate is also provided with a limiting cover, the limiting cover having a plurality of limiting strip holes, the limiting cover extending into the water tank, and the monitoring float located inside the limiting cover.

[0009] The beneficial effects of this utility model are as follows: (1) By installing a liquid level monitoring unit consisting of a monitoring float, a floating rod, and multiple proximity switches inside the water tank, this utility model can sense the changes in the liquid level of the cutting fluid in the tank in real time. When the liquid level is too low or too high, the corresponding proximity switch can be triggered, which can promptly issue an alarm or automatically control the start and stop of the high-pressure conveying device, fundamentally avoiding the problem of pump body running dry and burning due to low liquid level, effectively ensuring the safe and stable operation of the core components of the high-pressure conveying system, and extending the service life of the equipment.

[0010] (2) The liquid level monitoring unit adopts a combination of monitoring float and electronic induction, which has a simple structure and reliable operation. The limiting cover restricts the movement of the monitoring float within the vertical range, effectively preventing float drift and false triggering caused by liquid sloshing, and ensuring the accuracy and stability of liquid level signal acquisition.

[0011] (3) By setting a sensing module on the floating rod between the first proximity switch (high position), the second proximity switch (warning position), and the third proximity switch (stop position), this utility model realizes a multi-level liquid level monitoring function. It can not only stop the machine in an emergency when the liquid level is extremely low, but also issue an alarm in advance when the liquid level drops to the warning position to remind the operator to add cutting fluid in time, and can also stop adding cutting fluid when the liquid level is too high. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of this utility model and these drawings without creative effort.

[0013] Figure 1 A schematic diagram of the structure of a cutting fluid high-pressure delivery system level monitoring device provided in this embodiment of the present invention; Figure 2 A schematic diagram of the internal structure of a cutting fluid high-pressure delivery system level monitoring device provided in this embodiment of the present invention; Figure 3 This is a cross-sectional structural diagram of the liquid level monitoring unit provided in an embodiment of the present invention.

[0014] In the picture: 1. Housing; 11. Water tank; 2. High-pressure conveying device; 3. Liquid level monitoring unit; 31. Monitoring float; 32. Monitoring mounting plate; 321. Monitoring fixed chassis; 322. Monitoring hollow tube; 323. Monitoring stabilizing rod; 324. Monitoring fixed top plate; 325. Floating rod; 326. Sensing module; 327. First proximity switch; 328. Second proximity switch; 329. Third proximity switch; 33. Limit cover; 331. Limit strip hole; 4. Filter device. Detailed Implementation

[0015] To make the technical problems solved by this utility model, the technical solutions adopted, and the technical effects achieved clearer, the technical solutions of the embodiments of this utility model will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0016] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0017] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0018] In the description of this embodiment, the terms "upper," "lower," "left," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0019] like Figures 1 to 3 As shown, this embodiment provides a cutting fluid high-pressure delivery system level monitoring device, which includes a sealed housing 1. The internal space of the housing 1 is divided into upper and lower parts: a water tank 11 is integrated at the bottom for storing cutting fluid; the space above the water tank 11 is used to install a filter device 4 and a high-pressure delivery device 2 (e.g., a high-pressure pump). The inlet of the filter device 4 extends into the water tank 11 through a pipe, and its outlet is connected to the inlet of the high-pressure delivery device 2. The outlet of the high-pressure delivery device 2 is used to supply high-pressure cutting fluid to machining equipment such as machine tools. The used cutting fluid returns to the housing 1 through a return pipe, undergoes preliminary sedimentation, enters the filter device 4 for purification, and finally returns to the water tank 11, forming a circulation system.

[0020] To address the issue of the invisibility of the liquid level within the sealed tank 1, this embodiment includes a liquid level monitoring unit 3 installed on the top of the water tank 11. Specifically, the liquid level monitoring unit 3 comprises a monitoring mounting plate 32 fixedly installed on the top of the water tank 11. A monitoring mounting base 321 is fixedly mounted on the monitoring mounting plate 32. A monitoring hollow tube 322 and two or more monitoring stabilizing rods 323 are vertically fixed to the monitoring stabilizing base 321. The top ends of the monitoring hollow tube 322 and the monitoring stabilizing rods 323 are connected and fixed through a monitoring stabilizing top plate 324, forming a stable frame structure.

[0021] The monitoring hollow tube 322 has a hollow structure, with a floating rod 325 running through it. The bottom of the floating rod 325 extends downward into the water tank 11 and is connected to a monitoring float 31. A sensing module 326 (e.g., a permanent magnet or a metal sensor head) is installed at the top of the floating rod 325. When the cutting fluid level in the water tank 11 changes, the monitoring float 31 floats up and down accordingly, causing the floating rod 325 and the sensing module 326 to move up and down synchronously within the monitoring hollow tube 322.

[0022] The monitoring stabilizer bar 323 is vertically spaced with three proximity switches: First proximity switch 327: located at the top of the monitoring stabilizer bar 323, corresponding to the highest safe liquid level of the water tank 11. Second proximity switch 328: located at the bottom of the monitoring stabilizer bar 323, corresponding to the lowest safe liquid level (shutdown level) of the water tank 11. Third proximity switch 329: located between the first proximity switch 327 and the second proximity switch 328, closer to the second proximity switch 328, corresponding to the low warning liquid level of the water tank 11.

[0023] To further improve the stability and anti-interference capability of the monitoring, a limiting cover 33 is also fixedly installed at the bottom of the monitoring mounting plate 32. The limiting cover 33 extends downward below the liquid surface of the water tank 11 and covers the monitoring float 31 inside it. Several limiting strip holes 331 are opened on the cylindrical wall of the limiting cover 33 to ensure that the cutting fluid can flow in and out freely, while restricting the monitoring float 31 to move only within a small range in the vertical direction, effectively preventing float drift and false triggering caused by shaking of the tank 1 or liquid turbulence.

[0024] Under normal system operation, the liquid level is between the third proximity switch 329 and the first proximity switch 327. The sensing module 326 does not trigger any proximity switches.

[0025] Low-level warning: When the cutting fluid is consumed and the fluid level drops to the position of the third proximity switch 329, the sensing module 326 enters the sensing range of the third proximity switch 329. The third proximity switch 329 sends a signal to the control unit of the high-pressure cutting fluid delivery system. The control unit can trigger an audible and visual alarm to remind the operator "Low fluid level, please add fluid in time", but the system continues to operate.

[0026] Emergency shutdown: If the operator fails to add liquid in time, the liquid level continues to drop to the position of the second proximity switch 328, and the sensing module 326 triggers the second proximity switch 328. The second proximity switch 328 sends an emergency signal, and the control unit immediately cuts off the power to the high-pressure delivery device 2, forcing it to stop working, thereby preventing the pump body from running dry and being damaged.

[0027] Over-level protection: When cutting fluid is added to the water tank 11, the fluid level rises. When the fluid level reaches the position of the first proximity switch 327, the sensing module 326 triggers the first proximity switch 327. The first proximity switch 327 can send a signal, and the control unit can automatically close the fluid replenishment valve in conjunction with it.

[0028] Note that the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention. The scope of the present invention is determined by the scope of the appended claims.

Claims

1. A liquid level monitoring device for a high-pressure cutting fluid delivery system, comprising a housing (1), wherein a filter device (4) and a high-pressure delivery device (2) are provided inside the housing (1), characterized in that, A water tank (11) is provided inside the box (1). The water tank (11) is located at the bottom of the box (1). The filter device (4) and the high-pressure conveying device (2) are located above the water tank (11). A liquid level monitoring unit (3) is provided on the water tank (11). The liquid level monitoring unit (3) includes a monitoring float (31) which extends into the water tank (11).

2. The fluid level monitoring device for a high-pressure cutting fluid delivery system according to claim 1, characterized in that, The liquid level monitoring unit (3) also includes a monitoring mounting plate (32), which is located on the top of the water tank (11). A monitoring fixing base (321) is provided on the monitoring mounting plate (32), and a monitoring hollow tube (322) and a monitoring stabilizing rod (323) are provided on the monitoring fixing base (321). A monitoring fixing top plate (324) is connected to the top of the monitoring hollow tube (322) and the monitoring stabilizing rod (323). The monitoring hollow tube (322) is a hollow structure, and a floating rod (325) is provided inside the monitoring hollow tube (322). The top of the floating rod (325) is... The unit is equipped with a sensing module (326). The bottom of the floating rod (325) extends into the water tank (11) and connects to the monitoring float (31). When the monitoring float (31) moves up and down with the change of liquid level, the floating rod (325) moves up and down accordingly. The top of the monitoring stabilizing rod is equipped with a first proximity switch (327), the bottom of the monitoring stabilizing rod is equipped with a second proximity switch (328), and the monitoring stabilizing rod is equipped with a third proximity switch (329) near the bottom. The third proximity switch (329) is located between the first proximity switch (327) and the second proximity switch (328).

3. The fluid level monitoring device for a high-pressure cutting fluid delivery system according to claim 2, characterized in that, The bottom of the monitoring mounting plate (32) is also provided with a limiting cover (33), the limiting cover (33) has a plurality of limiting strip holes (331), the limiting cover (33) extends into the water tank (11), and the monitoring float is located inside the limiting cover (33).

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