Anti-oil immersion interference belt scale speed sensor protection device

Abstract

The utility model provides a kind of anti-oil immersion interference's belt scale speed sensor protection device, including the first protective cover, its inner cavity installs speed encoder;Second protective cover, its inner cavity installs transmission assembly;Wherein the butt joint surface of first protective cover and second protective cover is equipped with first communication passage, the butt joint surface of second protective cover and belt drive cylinder is equipped with second communication passage;Transmission assembly includes connecting pipe, the connecting pipe one end is connected with belt drive cylinder rotating shaft by transmission shaft, and other end is connected with transmission pin;Transmission pin extends to first protective cover by first communication passage, and is connected with the input end of speed encoder;Oil hole is equipped in the lateral wall of second protective cover.The utility model prolongs transmission path by transmission assembly, effectively prevents oil to immerse inside encoder by gap, by setting first protective cover, second protective cover and transmission assembly, each component cooperates and realizes the oil isolation and stable transmission function of speed encoder.

Description

Technical Field

[0001] This utility model belongs to the field of belt scale speed sensor protection technology, and in particular relates to a belt scale speed sensor protection device that resists oil immersion interference. Background Technology

[0002] In industrial production, belt scales are crucial equipment widely used for material conveying and metering. Especially in specific scenarios such as sintering operations, their precise batching and metering functions play a vital role in ensuring product quality. The feed rate (i.e., instantaneous flow rate) of a belt scale is calculated by multiplying the weight of material per unit length by the belt's running speed. The belt speed is primarily measured in real-time by a speed sensor, ensuring accurate material conveying and metering. The speed sensor is typically mounted on the shaft end of the belt drive roller, which, as the power source, directly reflects the belt's running speed.

[0003] However, belt conveyor bearings require regular lubrication and maintenance. When using speed encoders as speed sensors, after lubricating the bearings, the oil can easily seep into the encoder through gaps due to the centrifugal force generated by the shaft rotation, causing encoder slippage. Furthermore, oil seeping into the speed encoder will adhere to the surface of the photosensitive element, forming an oil film. This alters the light propagation path and intensity, weakening, destabilizing, or even deviating the light signal received by the photosensitive element. This severely affects the speed sensor's accurate measurement of belt speed, ultimately leading to inaccurate material flow calculations and consequently impacting the quality of products such as sintered ore. Utility Model Content

[0004] To address the problems existing in the prior art, this utility model aims to propose a protective device for the belt scale speed sensor that resists oil immersion interference, solving the problem that oil can easily seep into the speed encoder and adhere to the surface of the photosensitive element, affecting the speed sensor's accurate measurement of belt speed.

[0005] To achieve the above objectives, the technical solution of this utility model is implemented as follows: A protective device for a belt scale speed sensor resistant to oil immersion interference includes: The first protective cover has a speed encoder installed inside its cavity; The second protective cover has a transmission assembly installed inside its cavity; wherein: A first connecting channel is provided on the mating surface of the first protective cover and the second protective cover, and a second connecting channel is provided on the mating surface of the second protective cover and the belt drive roller. The transmission assembly includes a connecting pipe, one end of which is connected to the belt-driven roller shaft via a transmission shaft, and the other end is connected to a transmission pin; the transmission pin extends through the first connecting channel into the first protective cover and is connected to the input end of the speed encoder. An oil drain hole is provided on the side wall of the second protective cover.

[0006] Furthermore, the second protective cover is a hollow cylinder, and two oil drain holes are symmetrically arranged radially on the second protective cover.

[0007] Furthermore, the outer periphery of the end of the second protective cover that mates with the belt-driven roller is provided with an extension, and the extension is provided with a threaded hole for connecting with the belt-driven roller.

[0008] Furthermore, the second protective cover is equipped with a connector in the peripheral area of ​​the first connecting channel, the connector being used to connect to the housing of the speed encoder.

[0009] Furthermore, the connector is U-shaped, with its middle section connected to the end of the speed encoder via screws; both sides of the connector are connected to the ends of the second protective cover via screws.

[0010] Furthermore, the end of the second protective cover is fitted inside the first protective cover; threaded holes are correspondingly provided on the peripheral walls of the first and second protective covers, and the first and second protective covers are fixedly connected by screws installed in the threaded holes.

[0011] Furthermore, the transmission pin is a nylon rod pin.

[0012] Furthermore, the connecting pipe is a rubber hose.

[0013] Furthermore, the end of the transmission pin is embedded in the connecting pipe, and a clamp is installed on the outer wall of the connecting pipe to fix it to the transmission pin.

[0014] Furthermore, the end of the drive shaft is embedded in a connecting pipe, and a clamp is installed on the outer wall of the connecting pipe to fix it to the drive shaft.

[0015] Compared with existing technologies, the oil-immersion interference-resistant belt scale speed sensor protection device of this utility model has the following advantages: This utility model, through the provision of a first protective cover, a second protective cover, and a transmission assembly, achieves the functions of oil isolation and stable transmission of the speed encoder through the coordinated operation of these components. Specifically: The transmission path is extended by the transmission components, effectively preventing oil from seeping into the encoder through gaps. The second protective cover is fitted inside the first protective cover, forming a double protection structure that effectively isolates external dust, impurities, and oil from interfering with the internal speed encoder and transmission components, providing a higher level of protection. Even if a small amount of oil or impurities enters the first protective cover, the second protective cover can act as a second line of defense, further protecting the internal components.

[0016] The oil drain hole design of the second protective cover can promptly drain oil that enters the protective cover due to centrifugal force, preventing oil accumulation. Simultaneously, the use of oil-resistant rubber hoses as connecting pipes further enhances the protective performance due to their excellent resistance to oil corrosion, ensuring that oil will not damage the internal components of the speed encoder. This effectively isolates oil interference and guarantees the stable operation of the speed encoder.

[0017] The flexibility and shock absorption properties of the rubber hose effectively absorb vibrations and impacts generated during operation, reducing the impact of vibrations on the measurement accuracy of the speed encoder. Meanwhile, the drive pin uses a nylon rod pin; the insulation properties of the nylon rod pin and the sealing properties of the rubber hose work together to prevent electrical interference and the intrusion of external impurities, further improving the stability and reliability of the speed measurement system. Attached Figure Description

[0018] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. In the drawings: Figure 1 A schematic diagram of the overall structure provided for an embodiment of this utility model; Figure 2 This is a cross-sectional view of the overall structure provided for an embodiment of the present utility model.

[0019] Explanation of reference numerals in the attached figures: 1. First protective cover; 11. Threaded hole two; 2. Speed ​​encoder; 3. Second protective cover; 31. Oil drain hole; 32. Extension; 33. Threaded hole one; 4. Transmission assembly; 41. Connecting pipe; 42. Drive shaft; 43. Drive pin; 5. Connecting piece; 6. Clamp. Detailed Implementation

[0020] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments of the present invention can be combined with each other.

[0021] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, 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, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0022] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of 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.

[0023] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0024] like Figures 1 to 2 As shown, a protective device for a belt scale speed sensor resistant to oil immersion interference includes: The first protective cover 1 has a speed encoder 2 installed inside its cavity; The second protective cover 3 has a transmission assembly 4 installed in its inner cavity; wherein: A first connecting channel is provided on the mating surface of the first protective cover 1 and the second protective cover 3, and a second connecting channel is provided on the mating surface of the second protective cover 3 and the belt drive roller. The transmission assembly 4 includes a connecting pipe 41, one end of which is connected to the belt-driven roller shaft via a transmission shaft 42, and the other end is connected to a transmission pin 43; the transmission pin 43 extends through the first connecting channel into the first protective cover 1 and is connected to the input end of the speed encoder 2. An oil drain hole 31 is provided on the side wall of the second protective cover 3.

[0025] This invention provides a protective device for a belt scale speed sensor against oil immersion interference, effectively isolating the speed encoder 2 from oil interference and ensuring stable operation of the speed sensor. Its working principle is as follows: The rotational motion of the belt-driven roller is transmitted to the speed encoder 2 via the drive shaft 42, connecting pipe 41, and drive pin 43, driving the code disk of the speed encoder 2 to rotate. As the code disk inside the speed encoder 2 rotates with the shaft, it generates a pulse sequence through photoelectric or magnetoelectric elements. These pulse signals reflect the rotational speed of the belt-driven roller, and thus the running speed of the belt.

[0026] The generated pulse signal is transmitted to a weighing instrument or other control system via a hardware interface, displaying the belt speed in m / s (meters per second). The control system calculates the instantaneous flow rate of the material based on the speed signal, thereby achieving accurate material metering. Instantaneous flow rate = weight of material per unit length of belt multiplied by belt speed.

[0027] The second protective cover 3 is equipped with an oil drain hole 31, which is positioned directly below the belt conveyor bearing during installation. After lubrication of the belt conveyor bearing, the oil inside the second protective cover 3 can be smoothly discharged through the oil drain hole 31, preventing oil accumulation. The extended transmission path via the transmission assembly 4 and the oil drain hole 31 together form multiple layers of protection, effectively preventing oil from entering the speed encoder 2. Even if a small amount of oil enters the second protective cover 3, it will be discharged through the oil drain hole 31 and will not come into contact with the photosensitive element or other critical components of the speed encoder 2.

[0028] In this embodiment, the speed encoder model is 2PH158N1024P / R.

[0029] In a preferred embodiment of the present invention, the second protective cover 3 is a hollow cylinder, and the second protective cover 3 is provided with two oil drain holes 31 symmetrically along the radial direction.

[0030] Specifically, during the operation of the belt conveyor, when the oil enters the second protective cover 3 due to centrifugal force, the two symmetrically arranged oil drain holes 31 can quickly drain the oil that has entered the second protective cover 3, preventing the oil from accumulating and seeping into the first protective cover 1.

[0031] In a preferred embodiment of the present invention, the outer periphery of the end of the second protective cover 3 connected to the belt drive roller is provided with an extension 32, and the extension 32 is provided with a threaded hole 33 for connecting to the belt drive roller.

[0032] Specifically, by providing threaded holes 33 on the extension 32, the second protective cover 3 is tightly connected to the belt drive roller using bolts. This connection method has high mechanical strength and stability. The bolt connection can withstand large tensile and torque forces, ensuring that the second protective cover 3 and the belt drive roller will not loosen or shift during belt operation, thereby guaranteeing the stable operation of the transmission system.

[0033] The operator simply needs to pass the bolt through the threaded hole and tighten it to complete the installation, without the need for complicated tools or equipment. This simplified installation process not only saves time and labor costs but also reduces the risk of equipment failure due to improper installation.

[0034] In a preferred embodiment of the present invention, the end of the second protective cover 3 connected to the first protective cover 1 is provided with a circular hole for the transmission pin 43 to pass through, and the second protective cover 3 is provided with a connector 5 in the peripheral area of ​​the circular hole, the connector 5 being used to connect to the housing of the speed encoder 2.

[0035] Specifically, the circular hole provides a precise channel for the transmission pin 43, allowing the transmission pin 43 to accurately pass through the second protective cover 3 and connect to the speed encoder 2.

[0036] The drive pin 43 is securely connected to the speed encoder 2 via connector 5, which effectively reduces the impact of vibration generated during belt operation on the speed encoder 2. The stable connection structure keeps the speed encoder 2 relatively stationary during operation, avoiding fluctuations in the measurement signal or false triggering caused by vibration. This further improves the measurement accuracy and stability of the speed sensor, ensuring the accuracy of material metering.

[0037] In a preferred embodiment of this utility model, the connector 5 is U-shaped, and the middle part of the connector 5 is connected to the end of the speed encoder 2 by screws; the two sides of the connector 5 are respectively connected to the end of the second protective cover 3 by screws.

[0038] Specifically, there are two connecting pieces 5. The U-shaped connecting pieces 5 are connected to the end of the speed encoder 2 via bolts in the middle, and to the ends of the second protective cover 3 via bolts on both sides, forming a three-point fixing structure. This structure has extremely high mechanical stability and can evenly distribute forces from different directions, effectively preventing loosening or deformation of the connection due to single-point force. During the operation of the belt scale, even under large vibrations or impacts, the connecting pieces 5 can firmly maintain the connection between the transmission pin 43 and the speed encoder 2, ensuring the stable operation of the transmission system.

[0039] In a preferred embodiment of the present invention, the end of the second protective cover 3 is sleeved inside the first protective cover 1; threaded holes 11 are correspondingly provided on the peripheral walls of the first protective cover 1 and the second protective cover 3, and the first protective cover 1 and the second protective cover 3 are fixedly connected by screws installed in the threaded holes 11.

[0040] Specifically, the outer diameter of the first protective cover 1 is 60mm and the circumference is 188mm; the outer diameter of the main body of the second protective cover 3 is 65mm and the circumference is 204mm; the inner diameter of the end of the first protective cover 1 used to connect with the second protective cover 3 is 61mm and the axial length is 50mm; the length of the second protective cover 3 extending into the first protective cover 1 is 50mm.

[0041] The second protective cover 3 is fitted inside the first protective cover 1. This fitting method creates a tight nesting relationship between the two protective covers, increasing the contact area and connection strength, making the entire protective device more stable during operation and effectively resisting external impacts and vibrations. Simultaneously, the second protective cover 3, fitted inside the first protective cover 1, effectively isolates external dust, impurities, and oil from interfering with the internal speed encoder 2 and transmission components 4, providing a higher level of protection. Even if a small amount of oil or impurities enters the first protective cover 1, the second protective cover 3 can act as a second line of defense, further protecting the internal components.

[0042] The tightness of the screw connections effectively reduces gaps between the two protective covers, improving the overall sealing performance of the protective device. This excellent sealing performance prevents external environmental corrosion of internal components, extends the service life of the equipment, and ensures that internal components operate in a clean, dry environment, improving measurement accuracy and stability.

[0043] The first protective cover 1 is provided with mounting holes for the wires of the speed encoder 2 to pass through.

[0044] In a preferred embodiment of this utility model, the transmission pin 43 is a nylon rod pin.

[0045] Specifically, the nylon pin is 50mm long and 8mm in diameter. One end is embedded in the end of a rubber hose and secured by a metal clamp 6. The other end extends through the round hole of the second protective cover 3 into the first protective cover 1 and connects to the input end of the speed encoder 2 to achieve power transmission. The nylon pin has high wear resistance and can maintain stable size and shape during frequent rotation and transmission.

[0046] In a preferred embodiment of this utility model, the connecting pipe 41 is a rubber hose.

[0047] Specifically, the rubber hose is 10cm long and has an elastic cushioning function. During the operation of the belt scale, factors such as mechanical vibration, thermal expansion, or installation errors may cause changes in the relative position between the drive shaft 42 and the speed encoder 2. The flexibility of the rubber hose can effectively absorb these displacements, ensuring a stable connection of the transmission assembly 4 and avoiding component damage or transmission interruption caused by rigid connections.

[0048] The rubber hose has good sealing performance and can effectively prevent oil, dust and other impurities from entering the transmission component 4.

[0049] In a preferred embodiment of the present invention, the end of the transmission pin 43 is embedded in the connecting pipe 41, and a clamp 6 is installed on the outer wall of the connecting pipe 41 to fix it to the transmission pin 43.

[0050] Specifically, the combination of the embedded connection and the clamp 6 ensures a tight fit between the drive pin 43 and the connecting pipe 41, thereby guaranteeing the accurate transmission of power from the belt-driven roller shaft to the speed encoder 2. The clamp 6 effectively reduces vibration at the connection point, preventing loosening or wear between the drive pin 43 and the connecting pipe 41 due to vibration.

[0051] The embedded connection and clamp 6 fastening structure design makes the installation process simple and quick. The operator only needs to insert the end of the drive pin 43 into the connecting pipe 41, then install and tighten the clamp 6 to complete the fixed connection. This rapid installation method significantly reduces installation time, lowers installation difficulty, and improves installation efficiency.

[0052] In a preferred embodiment of the present invention, the end of the drive shaft 42 is embedded in the connecting pipe 41, and a clamp 6 is installed on the outer wall of the connecting pipe 41 to fix it to the drive shaft 42.

[0053] Specifically, the drive shaft 42 is connected to the belt-driven roller shaft via a coupling. The combination of the embedded connection and the clamp 6 enhances the deformation resistance of the entire transmission assembly 4. During the operation of the belt scale, even under significant vibration or impact, this structure maintains its shape stability without deformation or damage, thus ensuring the long-term stable operation of the transmission system.

[0054] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A protective device for a belt scale speed sensor resistant to oil immersion interference, characterized in that, include: The first protective cover has a speed encoder installed inside its cavity; The second protective cover has a transmission assembly installed inside its cavity; wherein: A first connecting channel is provided on the mating surface of the first protective cover and the second protective cover, and a second connecting channel is provided on the mating surface of the second protective cover and the belt drive roller. The transmission assembly includes a connecting pipe, one end of which is connected to the belt-driven roller shaft via a transmission shaft, and the other end is connected to a transmission pin; the transmission pin extends through the first connecting channel into the first protective cover and is connected to the input end of the speed encoder. An oil drain hole is provided on the side wall of the second protective cover.

2. The anti-oil-immersion interference belt scale speed sensor protection device according to claim 1, characterized in that: The second protective cover is a hollow cylinder, and two oil drain holes are symmetrically arranged radially on the second protective cover.

3. The anti-oil-immersion interference protection device for belt scale speed sensor according to claim 1, characterized in that: The second protective cover has an extension on the outer periphery of the end that connects with the belt-driven roller, and the extension has a threaded hole for connecting with the belt-driven roller.

4. The anti-oil-immersion interference belt scale speed sensor protection device according to claim 1, characterized in that: The second protective cover has a connector installed in the peripheral area of ​​the first connecting channel, the connector being used to connect to the housing of the speed encoder.

5. The anti-oil-immersion interference protection device for belt scale speed sensor according to claim 4, characterized in that: The connector is U-shaped, with its middle part connected to the end of the speed encoder and its two sides connected to the ends of the second protective cover, respectively.

6. The anti-oil-immersion interference belt scale speed sensor protection device according to claim 1, characterized in that: The end of the second protective cover is fitted inside the first protective cover. The first and second protective covers have corresponding threaded holes on their peripheral walls. The first and second protective covers are fixedly connected by screws installed in the threaded holes.

7. The anti-oil-immersion interference protection device for belt scale speed sensor according to claim 1, characterized in that: The transmission pin is a nylon rod pin.

8. The anti-oil-immersion interference protection device for belt scale speed sensor according to claim 1, characterized in that: The connecting pipe is a rubber hose.

9. The anti-oil-immersion interference protection device for belt scale speed sensor according to claim 1, characterized in that: The end of the transmission pin is embedded in the connecting pipe, and a clamp is installed on the outer wall of the connecting pipe to fix it to the transmission pin.

10. The anti-oil-immersion interference protection device for belt scale speed sensor according to claim 1, characterized in that: The end of the drive shaft is embedded in the connecting pipe, and a clamp is installed on the outer wall of the connecting pipe to fix it to the drive shaft.

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