A PP float structure for pump cavity internal detection

Abstract

This utility model discloses a PP float structure for internal pump chamber detection, including a side cover bolted to one end of the pump chamber. A U-shaped cylinder is fixedly installed at one end of the side cover, and an elongated opening at one end of the U-shaped cylinder connects it to the pump chamber. A liquid level detection mechanism is slidably installed inside the U-shaped cylinder. The liquid level detection mechanism includes a PP float and a guide rod. A threaded cylinder extends from the lower surface of the guide rod, and a PP float is threaded onto the outer surface of the threaded cylinder. The PP float slides within the U-shaped cylinder, and both the PP float and the guide rod are made of polypropylene. This application, through the design of the liquid level detection mechanism, ensures the structure's corrosion resistance in acidic and alkaline environments by using a PP float and guide rod made of polypropylene. The threaded connection and conical ring nesting design improve assembly convenience and linkage stability. Combined with the precise signal processing of a laser rangefinder sensor and controller, a highly efficient liquid level detection system adapted to the internal working conditions of the pump chamber is formed.

Description

Technical Field

[0001] This utility model relates to the field of buoy technology, specifically a PP buoy structure for internal detection of a pump cavity. Background Technology

[0002] In industrial production, especially in scenarios involving the filtration of non-ferrous metal solutions, such as water pumps and fluid control equipment, the stable operation of pumps directly affects production efficiency and equipment lifespan. The pump chambers of these devices are frequently exposed to corrosive fluids containing acids and alkalis. The level of the circulating cooling water is a critical parameter for ensuring normal pump operation—an excessively high level may cause fluid overflow and increased energy consumption, while an excessively low level can lead to insufficient cooling, causing pump overheating, accelerated component wear, and even equipment failure.

[0003] However, traditional pump level monitoring methods have obvious limitations or rely on manual observation, making it difficult to grasp dynamic changes in real time, or the monitoring components used are not corrosion resistant enough and are prone to failure in acidic or alkaline environments, resulting in delayed feedback of level information and failure to provide timely warnings of cooling water loss. Based on this, a PP float structure for internal pump chamber detection is proposed. Summary of the Invention

[0004] The purpose of this invention is to provide a PP float structure for internal pump chamber detection, in order to solve the problems mentioned in the background art regarding the traditional pump level monitoring method, which is difficult to monitor the dynamic changes of the liquid level in real time by manual observation, and the monitoring components are prone to failure due to insufficient corrosion resistance in acid and alkaline environments, resulting in delayed liquid level information feedback and inability to provide timely warnings of cooling water loss, thereby affecting the normal operation and service life of the pump.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A PP float structure for internal detection in a pump chamber includes a side cover that is bolted and sealed to one end of the pump chamber. A U-shaped cylinder is fixedly installed at one end of the side cover. An elongated opening is provided at one end of the U-shaped cylinder to connect it to the pump chamber. A liquid level detection mechanism is slidably installed inside the U-shaped cylinder.

[0007] The above-mentioned PP float structure for pump cavity internal detection includes a liquid level detection mechanism comprising a PP float and a guide rod. A threaded cylinder is installed on the lower surface of the guide rod, and the PP float is threaded on the outer surface of the threaded cylinder. The PP float slides inside the U-shaped cylinder, and both the PP float and the guide rod are made of polypropylene material.

[0008] In the aforementioned PP buoy structure for detecting the inside of the pump chamber, the guide rod extends and slides inside the guide cylinder, the guide cylinder is connected and installed on the upper surface of the U-shaped cylinder, and the guide cylinder extends through the pump chamber of the pump.

[0009] The aforementioned PP buoy structure for internal pump chamber detection comprises a PP float and a guide rod assembled into a complete PP buoy via a threaded connection.

[0010] In the aforementioned PP buoy structure for internal pump chamber detection, a plastic ring frame is installed on the outer surface of the PP buoy extending upwards. The plastic ring frame is nested on the outer surface of the conical ring during the process of the PP buoy being threaded onto the outer surface of the threaded cylinder. The conical ring is fixedly installed on the outer surface of the guide rod.

[0011] In the aforementioned PP buoy structure for internal pump chamber detection, a laser rangefinder is fixedly installed on the upper surface of the guide cylinder. The laser rangefinder is perpendicular to the guide rod. The signal transmitting end of the laser rangefinder is connected to the signal receiving end of the controller. The signal output end of the controller is electrically connected to the electronic control end of the pump.

[0012] The aforementioned PP buoy structure for detecting the inside of the pump chamber includes a laser rangefinder 201 of model SKFA and a controller of model S7-200SMART.

[0013] The aforementioned PP float structure for internal pump chamber detection includes at least two guide flanges evenly distributed circumferentially on the outer surface of the PP float, and the guide flanges slidingly engage with the inner wall of the U-shaped cylinder.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] The U-shaped cylinder and pump chamber connection design ensures the authenticity and synchronization of liquid level detection. The liquid level detection mechanism, utilizing the acid and alkali resistance of PP material, can operate stably in corrosive media, effectively solving the problem of easy failure of traditional monitoring components. The threaded connection, combined with the plastic ring frame and conical ring, improves the ease of float assembly and structural sealing, while ensuring the accuracy of guide rod linkage during liquid level changes. The combination of laser rangefinder and controller enables real-time capture and intelligent processing of liquid level signals, triggering timely warnings or shutdown protection, significantly improving pump operation safety and extending equipment lifespan. The overall structure adapts to the complex working conditions inside the pump chamber, balancing practicality and reliability. Furthermore, the detachable connection achieved through the threaded cylinder allows for the installation and replacement of the PP float and guide rod without complex tools, facilitating the individual replacement of worn parts during later maintenance, such as replacing the PP float due to long-term corrosion, thus reducing maintenance costs. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the structure of the guide tube and U-shaped tube of this utility model;

[0018] Figure 3 This is a schematic diagram of the guide rod and PP float of this utility model;

[0019] Figure 4 This is a schematic diagram of the liquid level detection mechanism of this utility model.

[0020] In the diagram: 1. Pump; 101. Side cover; 102. Guide cylinder; 103. U-shaped cylinder; 2. Liquid level detection mechanism; 201. Laser rangefinder sensor; 202. Guide rod; 203. PP float; 204. Threaded cylinder; 205. Plastic ring frame; 206. Conical ring. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Please see Figures 1-4 This embodiment provides the following technical solution:

[0023] like Figures 1-2 As shown, a PP float structure for internal detection of a pump cavity includes a side cover 101 that is bolted and installed at one end of the pump cavity of a pump 1. A U-shaped cylinder 103 is fixedly installed at one end of the side cover 101. One end of the U-shaped cylinder 103 has an elongated opening to connect it to the pump cavity. A liquid level detection mechanism 2 is slidably installed inside the U-shaped cylinder 103.

[0024] Through the design of pump 1, side cover 101, guide cylinder 102, U-shaped cylinder 103 and liquid level detection mechanism 2, when pump 1 is running, the circulating water inside its pump chamber flows into the U-shaped cylinder 103 through the long opening at one end of the U-shaped cylinder 103, so that the liquid level in the U-shaped cylinder 103 is consistent with the liquid level in the main chamber of the pump chamber. The liquid level detection mechanism 2 is slidably installed inside the U-shaped cylinder 103 and is in direct contact with the medium. It uses buoyancy to rise and fall synchronously along the inner wall of the U-shaped cylinder 103 with the liquid level. When the liquid level in the pump chamber rises, the liquid level detection mechanism 2 moves upward under the action of buoyancy. When the liquid level drops, such as when cooling water is lost, the liquid level detection mechanism 2 sinks synchronously with the liquid level. During this process, the liquid level detection mechanism 2 will capture the liquid level change information in real time and transmit the signal to the controller. The controller will process the signal according to the preset liquid level threshold. When the liquid level is normal, pump 1 maintains normal operation. When the liquid level is lower than the warning value, the controller sends a command to the electric control terminal of pump 1 to shut down for protection.

[0025] like Figures 3-4 As shown, the liquid level detection mechanism 2 includes a PP float 203 and a guide rod 202. A threaded cylinder 204 is installed on the lower surface of the guide rod 202, and the PP float 203 is threaded on the outer surface of the threaded cylinder 204. The PP float 203 slides inside the U-shaped cylinder 103. Both the PP float 203 and the guide rod 202 are made of polypropylene. The guide rod 202 extends and slides inside the guide cylinder 102, which is connected to the upper surface of the U-shaped cylinder 103 and extends through the pump chamber of the pump 1. The PP float 203 and the guide rod 202 are assembled into a complete PP float by a threaded connection. The outer surface of the PP float 203 faces... A plastic ring frame 205 is installed on the upper extension. The plastic ring frame 205 is nested on the outer surface of the conical ring 206 during the process of the PP float 203 being threaded onto the outer surface of the threaded cylinder 204. The conical ring 206 is fixedly installed on the outer surface of the guide rod 202. A laser rangefinder 201 is fixedly installed on the upper surface inside the guide cylinder 102. The laser rangefinder 201 is perpendicular to the guide rod 202. The signal transmitting end of the laser rangefinder 201 is connected to the signal receiving end of the controller. The signal output end of the controller is electrically connected to the electrical control end of the pump 1. The laser rangefinder 201 is of model SKFA, and the controller is of model S7-200SMART.

[0026] Through the design of the laser rangefinder 201, guide rod 202, PP float 203, threaded cylinder 204, plastic ring frame 205, and conical ring 206, when pump 1 is running, the medium inside the pump chamber enters the U-shaped cylinder 103 through the elongated opening. Due to the acid and alkali resistance of polypropylene material and buoyancy, the PP float 203 slides within the U-shaped cylinder 103 as the liquid level changes. When the liquid level rises, the PP float 203 is pushed upward by buoyancy; when the liquid level falls, the PP float 203 sinks synchronously with the liquid level. Furthermore, since the PP float 203 is threaded onto the threaded cylinder 204 below the guide rod 202, the two form a complete PP buoy. Therefore, the rising and falling of the PP float 203 will cause the guide rod 202 to slide synchronously along the guide cylinder 102. Simultaneously, the plastic ring frame 205 on the outer surface of the PP float 203 is nested within the conical ring 206 on the outer surface of the guide rod 202 during the threaded connection process, reinforcing the PP float 203 through the conical surface fit. The connection between the PP float 203 and the guide rod 202 ensures sealing and structural stability, preventing media from seeping into the threaded gaps and affecting the linkage accuracy. The laser range sensor 201 at the top of the guide cylinder 102 is perpendicular to the guide rod 202 and detects the distance change between itself and the top of the guide rod 202 in real time, transmitting the distance signal to the controller. The controller can then convert the distance data into liquid level information through a preset program. When the liquid level is lower than the safety threshold, the controller sends a command to the pump 1 electrical control terminal to trigger an alarm or shutdown protection, achieving accurate monitoring and intelligent response of the liquid level inside the pump chamber. Throughout the process, the PP float 203 and guide rod 202, made of polypropylene, ensure the corrosion resistance of the structure in acidic and alkaline environments, while the threaded connection and the nested design of the conical ring 206 improve assembly convenience and linkage stability. Combined with the precise signal processing of the laser range sensor 201 and the controller, a high-efficiency liquid level detection system adapted to the working conditions inside the pump chamber is formed.

[0027] The PP float 203 has at least two guide flanges evenly distributed circumferentially on its outer surface, which slide in contact with the inner wall of the U-shaped cylinder 103. By providing guide flanges on the outer surface of the PP float, the radial sway of the PP float within the U-shaped cylinder can be further restricted, ensuring that it slides stably only along the axial direction. This reduces float sway caused by liquid level fluctuations or pump vibrations, thereby improving the stability of the laser rangefinder sensor and the accuracy of the liquid level data. At the same time, the guide flanges reduce the contact area between the PP float and the inner wall of the U-shaped cylinder, reducing sliding friction and extending the service life of the components.

[0028] Working principle: When pump 1 is running, the medium inside the pump chamber enters the U-shaped cylinder 103 through the elongated opening. Due to the acid and alkali resistance of polypropylene material and buoyancy, the PP float 203 slides within the U-shaped cylinder 103 as the medium level changes. When the liquid level rises, the PP float 203 is pushed upward by buoyancy; when the liquid level falls, the PP float 203 sinks synchronously with the liquid level. Since the PP float 203 is threadedly mounted on the threaded cylinder 204 below the guide rod 202, the two form a complete PP buoy. Therefore, the rising and falling of the PP float 203 will cause the guide rod 202 to slide synchronously along the guide cylinder 102. Simultaneously, the outer surface of the PP float 203... The plastic ring 205 is nested on the conical ring 206 on the outer surface of the guide rod 202 during the threaded connection. The conical surface cooperation enhances the connection sealing and structural stability between the PP float 203 and the guide rod 202. The laser range sensor 201 at the top of the guide cylinder 102 is perpendicular to the guide rod 202 and will detect the distance change between the top of the guide rod 202 in real time and transmit the distance signal to the controller. The controller can convert the distance data into liquid level information through a preset program. When the liquid level is lower than the safety threshold, the controller sends a command to the electric control terminal of the pump 1 to trigger an alarm or shutdown protection, thereby realizing accurate monitoring and intelligent response of the liquid level inside the pump chamber.

[0029] In summary: the PP float 203 and guide rod 202 made of polypropylene material ensure the corrosion resistance of the structure in acidic and alkaline environments, while the nested design of threaded connection and conical ring 206 improves the ease of assembly and linkage stability. Combined with the laser range sensor 201 and the precise signal processing of the controller, a high-efficiency liquid level detection system adapted to the internal working conditions of the pump chamber is formed.

[0030] All parts not described in this utility model are the same as or can be implemented using existing technology. Although embodiments of this utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this utility model, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A PP float structure for detecting the inside of a pump cavity, characterized in that, Includes a side cover (101) that is bolted and installed at one end of the pump chamber of the pump (1). A U-shaped cylinder (103) is fixedly installed at one end of the side cover (101). A long opening is provided at one end of the U-shaped cylinder (103) to connect it to the pump chamber. A liquid level detection mechanism (2) is slidably installed inside the U-shaped cylinder (103). The liquid level detection mechanism (2) includes a PP float (203) and a guide rod (202). A threaded cylinder (204) is installed on the lower surface of the guide rod (202), and the PP float (203) is threaded on the outer surface of the threaded cylinder (204). The PP float (203) slides inside the U-shaped cylinder (103), and both the PP float (203) and the guide rod (202) are made of polypropylene. The guide rod (202) extends and slides inside the guide cylinder (102). The guide tube (102) is connected to the upper surface of the U-shaped tube (103), and the guide tube (102) extends through the pump cavity of the pump (1); a laser range sensor (201) is fixedly installed on the upper surface inside the guide tube (102), the laser range sensor (201) is perpendicular to the guide rod (202), the signal transmitting end of the laser range sensor (201) is connected to the signal receiving end of the controller, and the signal output end of the controller is electrically connected to the electrical control end of the pump (1).

2. The PP float structure for internal pump chamber detection according to claim 1, characterized in that, The PP buoy (203) and the guide rod (202) are assembled into a complete PP buoy by threaded connection.

3. The PP float structure for internal pump chamber detection according to claim 1, characterized in that, A plastic ring frame (205) is installed on the outer surface of the PP float (203) extending upward. The plastic ring frame (205) is nested on the outer surface of the conical ring (206) during the process of the PP float (203) being threaded onto the outer surface of the threaded cylinder (204). The conical ring (206) is fixedly installed on the outer surface of the guide rod (202).

4. The PP float structure for internal pump chamber detection according to claim 1, characterized in that, The laser rangefinder (201) is model SKFA, and the controller is model S7-200SMART.

5. The PP float structure for internal pump chamber detection according to claim 1, characterized in that, The outer surface of the PP pontoon (203) is evenly distributed with at least two guide flanges along the circumference, and the guide flanges slide in contact with the inner wall of the U-shaped cylinder (103).

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