Torque tube type pontoon liquid level meter hook limiting device

Abstract

The application discloses a torque tube type pontoon liquid level meter hook limiting device, and relates to the technical field of instrument detection.The maximum activity range of a cross arm is determined according to a torque tube safe stretching threshold value, the first limiting piece and the second limiting piece are moved along a screw rod to the corresponding limit positions and are fixed through a jacking screw, and a fixed plate provides support positioning between the first limiting piece and the second limiting piece.When the pontoon drives the suspension assembly to move with the change of the liquid level, the cross arm moves with it.If the cross arm exceeds the torque tube safe stretching threshold value upwards, the first limiting piece forms an obstruction.If the cross arm exceeds the torque tube safe stretching threshold value downwards, the second limiting piece limits the movement of the cross arm.The activity range of the cross arm is limited in two directions, the stretching amount of the torque tube is controlled within a safe range, and the position of the limiting piece can be adjusted to adapt to different working conditions, so that the torque tube is protected, thereby solving the technical problem that the torque tube is damaged due to excessive stretching, and achieving the technical effect that the torque tube is not damaged due to excessive stretching.

Description

Technical Field

[0001] This application relates to the field of instrumentation technology, and in particular to a hook limiting device for a torque tube float level gauge. Background Technology

[0002] In the manufacturing and application of float level gauges, the torque tube, as the core sensing element, directly determines the accuracy, stability, and service life of the level measurement.

[0003] Existing torque tube float level gauges drive a torsion bar system through changes in buoyancy on the float, which in turn causes the torque tube to produce a small elastic torsion proportional to the buoyancy, thereby achieving accurate liquid level measurement. The lower hook connected to the float connecting rod directly bears the tension. During the production and commissioning phase, the instrument needs to be calibrated by suspending weights. If the applied weights are too heavy, excessive downward tension will be generated. Since the torque tube is connected to the upper hook of the float connecting rod through the cross arm, the lever structure formed by the cross arm will convert the force into a strong axial tensile force at the root of the torque tube, causing the torque tube to be overstretched and damaged.

[0004] In view of this, we provide a torque tube type float level gauge hook limiting device to solve the above problems. Utility Model Content

[0005] The purpose of this application is to solve the technical problem of damage caused by excessive stretching of the torque tube. In order to solve the above technical problem, a torque tube float level gauge hook limiting device is provided to prevent damage caused by excessive stretching of the torque tube.

[0006] To achieve the above objectives, the embodiments of this application adopt the following technical solution: a hook limiting device for a torque tube type float level gauge, comprising: a housing, a torque tube, a cross arm, and a suspension assembly. The suspension assembly includes a screw, a lower hook, and an upper hook. The screw is disposed between the upper hook and the lower hook. One end of the cross arm is fixedly connected to one end of the torque tube, and the other end of the cross arm is connected to the upper hook. A fixing plate and a limiting assembly are also included. The limiting assembly includes a first limiting member and a second limiting member. The limiting assembly has a connecting hole. The fixing plate is fixedly connected to the housing and is disposed between the first and second limiting members. The screw passes through the connecting hole. The limiting assembly can move axially along the screw to set a limiting distance and is fixed by a tightening screw. The first limiting member is used to limit the highest position of the cross arm's upward movement, and the second limiting member is used to limit the lowest position of the cross arm's downward movement. The cross arm is constrained by the limiting assembly to prevent the torque tube from being excessively stretched due to excessive force.

[0007] Furthermore, according to the embodiments of this application, both the first limiting member and the second limiting member are annular structures, and the connecting hole is adapted to the screw.

[0008] Furthermore, according to an embodiment of this application, the tightening screw is arranged radially along the limiting assembly, and the end of the tightening screw abuts against the outer wall of the screw rod.

[0009] Furthermore, according to an embodiment of this application, a guide hole is provided on the fixing plate, the diameter of which is larger than the diameter of the screw and smaller than the outer diameter of the limiting component.

[0010] Furthermore, according to an embodiment of this application, the connection position between the cross arm and the upper hook is located above the first limiting member.

[0011] Furthermore, according to an embodiment of this application, the first limiting member and the second limiting member are arranged on the same axis.

[0012] Furthermore, according to an embodiment of this application, the outer wall of the screw is provided with a scale mark, which is used to indicate the position of the first limiting member and the second limiting member.

[0013] Furthermore, according to the embodiments of this application, the first limiting member and the second limiting member are made of stainless steel.

[0014] Furthermore, according to an embodiment of this application, the crossarm is arranged perpendicularly to the suspension assembly, and the fixing plate and the limiting assembly are disposed within the housing.

[0015] Furthermore, according to an embodiment of this application, the lower hook of the suspension assembly is detachably connected to the buoy, and the gravity of the buoy is transmitted to the cross arm and torque tube through the suspension assembly.

[0016] Compared with the prior art, this application has the following beneficial effects: Based on the safe stretching threshold of the torque tube, the maximum range of motion of the cross arm is determined. The first and second limiting members are moved along the screw to the corresponding limit positions and fixed by the tightening screw. The fixing plate provides support and positioning between the first and second limiting members. When the float moves with the liquid level and drives the suspension assembly to move, the cross arm moves with it. If it exceeds the safe stretching threshold of the torque tube upward, the first limiting member forms a block. If it exceeds the safe stretching threshold of the torque tube downward, the second limiting member restricts its movement. By bidirectionally constraining the range of motion of the cross arm, the stretching amount of the torque tube is controlled within a safe range. Moreover, the position of the limiting members can be adjusted to adapt to different working conditions and protect the torque tube. This solves the technical problem of damage caused by excessive stretching of the torque tube and achieves the technical effect that the torque tube will not be damaged by excessive stretching. Attached Figure Description

[0017] The present application will be further described below with reference to the accompanying drawings and embodiments.

[0018] Figure 1 This is a schematic diagram of the structure of a hook limiting device for a torque tube type float level gauge according to an embodiment of this application.

[0019] Figure 2 This is a left-side structural schematic diagram of a hook limiting device for a torque tube float level gauge according to an embodiment of this application.

[0020] In the attached diagram: 1. Limiting component; 11. Second limiting component; 12. First limiting component; 13. Connecting hole; 14. Tightening screw; 2. Suspension component; 21. Upper hook; 22. Screw; 23. Lower hook; 3. Fixing plate; 4. Housing; 5. Cross arm; 6. Torque tube. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this utility model clear and complete, the embodiments of this utility model will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only some, not all, embodiments of this utility model, and are merely used to explain the embodiments of this utility model. They are not intended to limit the embodiments of this utility model. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0022] In the description of this utility model, it should be noted that the terms "center," "middle," "upper," "lower," "left," "right," "inner," "outer," "top," "bottom," "side," "vertical," and "horizontal," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship 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 "a," "first," "second," "third," "fourth," "fifth," and "sixth" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0023] 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.

[0024] For purposes of simplicity and illustration, the principles of the embodiments are described primarily by way of example. In the following description, numerous specific details are set forth to provide a thorough understanding of the embodiments. However, it will be apparent to those skilled in the art that these embodiments may not be limited to these specific details in practice. In some instances, well-known methods and structures have not been described in detail to avoid unnecessarily obscuring these embodiments. Furthermore, all embodiments can be used in combination with each other. Example

[0025] like Figure 1 , 2 As shown, this embodiment provides a hook limiting device for a torque tube type float level gauge, including: a housing 4, a torque tube 6, a cross arm 5, and a suspension assembly 2. The suspension assembly 2 includes a screw 22, a lower hook 23, and an upper hook 21. The screw 22 is disposed between the upper hook 21 and the lower hook 23. One end of the cross arm 5 is fixedly connected to one end of the torque tube 6, and the other end of the cross arm 5 is connected to the upper hook 21. A fixing plate 3 and a limiting assembly 1 are also included. The limiting assembly 1 includes a first limiting member 12 and a second limiting member 11. A connecting hole 13 is provided, and a fixing plate 3 is fixedly connected to the outer shell 4. The fixing plate 3 is located between the first limiting member 12 and the second limiting member 11. The screw 22 passes through the connecting hole 13. The limiting component 1 can move axially along the screw 22 to set the limiting distance and is fixed by the tightening screw 14. The first limiting member 12 is used to limit the highest position of the horizontal arm 5 moving upward, and the second limiting member 11 is used to limit the lowest position of the horizontal arm 5 moving downward. The horizontal arm 5 is constrained by the limiting component 1 to prevent the torque tube 6 from being overstretched due to excessive force.

[0026] Based on the safe stretching threshold of the torque tube 6, the maximum range of motion of the cross arm 5 is determined. The first limiting member 12 and the second limiting member 11 are moved along the screw 22 to the corresponding limit positions and fixed by the tightening screw 14. The fixing plate 3 provides support and positioning between the first limiting member 12 and the second limiting member 11. When the float moves with the liquid level, causing the suspension assembly 2 to move, the cross arm 5 moves with it. If it exceeds the safe stretching threshold of the torque tube 6 upwards, the first limiting member 12 forms a block. If it exceeds the safe stretching threshold of the torque tube 6 downwards, the second limiting member 11 restricts its movement. By bidirectionally constraining the range of motion of the cross arm 5, the stretching amount of the torque tube 6 is controlled within a safe range. Furthermore, the position of the limiting member can be adjusted to adapt to different working conditions, thus protecting the torque tube 6. This solves the technical problem of damage caused by excessive stretching of the torque tube 6 and achieves the technical effect that the torque tube 6 will not be damaged by excessive stretching. Example

[0027] like Figure 1 , 2As shown, both the first limiting member 12 and the second limiting member 11 are annular structures, and the connecting hole 13 is adapted to the screw 22. The fixing plate 3 is provided with a guide hole, the diameter of which is larger than the diameter of the screw 22 and smaller than the outer diameter of the limiting assembly 1.

[0028] The first limiting member 12 and the second limiting member 11 of the annular structure are sleeved on the screw 22 through the connecting hole 13. The guide hole of the fixing plate 3 allows the screw 22 to pass through and forms a limiting support because the hole diameter is smaller than the outer diameter of the limiting component 1. When the float drives the suspension component 2 to move, the cross arm 5 moves up and down with it. At this time, the first limiting member 12 prevents it from moving too high, and the second limiting member 11 restricts it from moving too low. The annular structure ensures that the limiting member and the screw 22 fit stably, and the guide hole restricts the radial sway of the screw 22. Together, they form a two-way mechanical limit, which controls the stretching amount of the torque tube 6 within a safe range and avoids damage from excessive stretching.

[0029] Rubber pads are provided on the side of the first limiting member 12 and the second limiting member 11 facing the fixed plate 3. First, according to the safety tension threshold of the torque tube 6, the first limiting member 12 and the second limiting member 11 are moved to the preset position along the axial direction of the screw 22, and the tightening screw 14 is tightened to make them abut against the outer wall of the screw 22 and fixed. At this time, the rubber pads of the first limiting member 12 and the second limiting member facing the fixed plate 3 are in the natural state. When the liquid level changes and causes the float and the suspension assembly to move, the cross arm 5 moves up and down with it. If the cross arm 5 approaches the safety limit upward, the first limiting member 12 will first contact the cross arm 5 to form a rigid block. At the same time, the first limiting member 12 faces the fixed plate 3. The rubber pad will deform slightly due to the reaction force of the horizontal arm 5 on the limiting component, absorbing some of the impact energy and preventing the limiting component from directly colliding rigidly with the fixed plate 3. If the horizontal arm 5 moves downwards to a safe range, the second limiting component 11 will contact the horizontal arm 5 to achieve limiting. The rubber pad on the second limiting component 11 will form a buffer with the fixed plate 3, reducing the impact force at the moment of contact. Throughout the process, the rubber pad will not affect the precise limiting of the horizontal arm 5 by the limiting component, and can also buffer the collision between the limiting component and the fixed plate 3 through its own deformation, reducing the wear of the components during long-term use. This achieves the technical effect that the torque tube 6 will not be overstretched and will not be damaged.

[0030] like Figure 1 , 2 As shown, the tightening screw 14 is arranged radially along the limiting component 1, and the end of the tightening screw 14 abuts against the outer wall of the screw 22.

[0031] The tightening screw 14 is radially arranged along the limiting component 1, and its end abuts against the outer wall of the screw 22 to form an adjustable positioning structure. During installation, loosening the tightening screw 14 allows the first limiting component 12 and the second limiting component 11 to move freely along the axial direction of the screw 22. After adjusting to the target position according to the preset torque tube 6 within the safe full range, tighten the tightening screw 14 so that its end is tightly against the outer wall of the screw 22. The position of the limiting component is fixed by friction. When the float drives the liquid level change and drives the suspension component 2 to move, the cross arm 5 moves up and down with it. If it approaches the limit position, the limiting component forms a block by contacting the cross arm 5, and the rigid contact of the tightening screw 14 ensures that the limiting component does not displace when under force, thereby stabilizing the limiting accuracy. With the torque tube 6, the stretching amount is always controlled within the safe range to achieve reliable protection.

[0032] like Figure 1 , 2 As shown, the first limiting member 12 and the second limiting member 11 are arranged on the same axis. The first limiting member 12 and the second limiting member 11 are made of stainless steel.

[0033] The first limiting member 12 and the second limiting member 11 are set on the same axis to ensure that the limiting direction of the cross arm 5 is consistent and to avoid the failure of the limiting due to misalignment. When the liquid level changes, the float drives the suspension assembly 2 to move, and the cross arm 5 moves up and down along the axis. When the cross arm 5 approaches the limit position upward, the first limiting member 12 on the same axis accurately prevents it from moving too high. When it approaches the limit downward, the second limiting member 11 simultaneously restricts its downward movement. The stainless steel material ensures that the limiting members are not easily deformed or worn in long-term force contact. Through precise axial limiting, the amount of stretching of the torque tube 6 is reliably controlled to avoid damage from excessive stretching.

[0034] like Figure 1 , 2 As shown, the outer wall of the screw 22 is provided with scale markings, which are used to indicate the positions of the first limiting member 12 and the second limiting member 11. The cross arm 5 is arranged perpendicularly to the suspension assembly 2, and the fixing plate 3 and the limiting assembly 1 are arranged inside the housing 4.

[0035] The scale markings on the outer wall of the screw 22 provide a visual reference for adjusting the positions of the first limiting member 12 and the second limiting member 11, facilitating precise setting of their distance to match the safe deformation range of the torque tube 6. The cross arm 5 is perpendicular to the suspension assembly 2, optimizing the force transmission path. The fixing plate 3 and the limiting assembly 1 are built into the housing 4, forming a protective structure. During installation, the first limiting member 12 and the second limiting member 11 are adjusted to the preset position along the axial direction of the screw 22 according to the scale markings and fixed by the tightening screw 14. When the liquid level changes, causing the float to move the suspension assembly 2, the vertically connected cross arm 5 moves up and down under the driving force of the suspension assembly 2. The fixing plate 3 inside the housing 4 provides stable support for the limiting assembly 1, while the two limiting members prevent the cross arm 5 from moving excessively within the range defined by the scale. The visual scale ensures the limiting accuracy, controlling the stretching of the torque tube 6 within a safe range and preventing damage.

[0036] like Figure 1 , 2 As shown, the lower hook 23 of the suspension assembly 2 is detachably connected to the buoy, and the gravity of the buoy is transmitted to the cross arm 5 and the torque tube 6 through the suspension assembly 2. The connection position between the cross arm 5 and the upper hook 21 is located above the first limiting member 12.

[0037] The lower hook 23 of the suspension assembly 2 is detachably connected to the float, facilitating the replacement and maintenance of the float. The weight of the float is transmitted sequentially to the cross arm 5 and the torque tube 6 through the suspension assembly 2, forming a force transmission path. The connection position between the cross arm 5 and the upper hook 21 is located above the first limiting member 12, reserving a limiting space for the upward movement of the cross arm 5. During operation, the float is driven to move by the buoyancy change of the liquid level, and the weight is transmitted to the cross arm 5 through the lower hook 23, screw 22, and upper hook 21, causing the cross arm 5 to deform the torque tube 6. When the liquid level drops, the weight of the float increases, the stretch of the torque tube 6 increases, and the cross arm 5 moves upward accordingly. At this time, the first limiting member 12 located below it forms a blockage, limiting the excessive upward movement of the cross arm 5. When the liquid level rises, the weight of the float decreases, the torque tube 6 contracts, and the cross arm 5 moves downward. The second limiting member 11 then limits its excessive downward movement. The detachable connection ensures compatibility with different buoy sizes, while the layout of the connection position and the force transmission path enable the limiting component 1 to precisely control the deformation of the torque tube 6.

[0038] Although the illustrative specific embodiments of this application have been described above to enable those skilled in the art to understand this application, this application is not limited to the scope of the specific embodiments. For those skilled in the art, all applications utilizing the concept of this application are protected as long as various variations are within the spirit and scope of this application as defined and determined by the appended claims.

Claims

1. A hook limiting device for a torque tube type float level gauge, comprising: The device comprises a housing, a torque tube, a cross arm, and a suspension assembly. The suspension assembly includes a screw, a lower hook, and an upper hook. The screw is positioned between the upper hook and the lower hook. One end of the cross arm is fixedly connected to one end of the torque tube, and the other end of the cross arm is connected to the upper hook. The feature is that it comprises a fixed plate and a limiting assembly, the limiting assembly including a first limiting member and a second limiting member, the limiting assembly being provided with a connecting hole, the fixed plate being fixedly connected to the outer shell, the fixed plate being disposed between the first limiting member and the second limiting member, the screw passing through the connecting hole, the limiting assembly being movable along the axial direction of the screw to set a limiting distance and being fixed by a tightening screw, the first limiting member being used to limit the highest position of the horizontal arm moving upward, the second limiting member being used to limit the lowest position of the horizontal arm moving downward, the horizontal arm being constrained by the limiting assembly to prevent the torque tube from being overstretched due to excessive force.

2. The hook limiting device for a torque tube type float level gauge according to claim 1, characterized in that, Both the first and second limiting members are annular structures, and the connecting hole is adapted to the screw.

3. The hook limiting device for a torque tube type float level gauge according to claim 1, characterized in that, The tightening screw is arranged radially along the limiting assembly, and the end of the tightening screw abuts against the outer wall of the screw rod.

4. The hook limiting device for a torque tube type float level gauge according to claim 1, characterized in that, The fixing plate is provided with a guide hole, the diameter of which is larger than the diameter of the screw and smaller than the outer diameter of the limiting component.

5. The hook limiting device for a torque tube type float level gauge according to claim 1, characterized in that, The connection point between the horizontal arm and the upper hook is located above the first limiting member.

6. The hook limiting device for a torque tube type float level gauge according to claim 1, characterized in that, The first limiting member and the second limiting member are arranged on the same axis.

7. The hook limiting device for a torque tube type float level gauge according to claim 1, characterized in that, The outer wall of the screw is provided with scale markings, which are used to indicate the positions of the first limiting member and the second limiting member.

8. The hook limiting device for a torque tube type float level gauge according to claim 1, characterized in that, The first and second limiting components are made of stainless steel.

9. The hook limiting device for a torque tube type float level gauge according to claim 1, characterized in that, The cross arm is perpendicular to the suspension assembly, and the fixing plate and the limiting assembly are disposed inside the housing.

10. The hook limiting device for a torque tube type float level gauge according to claim 1, characterized in that, The lower hook of the suspension assembly is detachably connected to the buoy, and the gravity of the buoy is transmitted to the cross arm and torque tube through the suspension assembly.

Images