A torque tube type float level gauge torsion rod assembly
Patent Information
- Application Number
- CN202522505716.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-26
- Publication Date
- 2026-10-09
- Estimated Expiration
- 2035-11-26
AI Technical Summary
[0005]本申请的目的是解决扭矩管组件结构稳定性差且扭矩管容易泄露的技术问题，为解决上述技术问题，提供一种扭矩管组件结构稳定性好且扭矩管不易泄露的扭矩管式浮筒液位计扭力杆组件
[0016]与现有技术相比，本申请具有以下有益效果: 通过将内管与外管设置为同轴结构，形成双重管状支撑框架，提升整体结构刚性，内管与扭矩管间增设过渡套并通过焊接固定，避免内管与扭矩管直接接触产生的干扰，保障扭力传递精度，外管两端内壁设台阶结构，使密封件与台阶形成适配嵌合后焊接为整体，同时密封件内侧与内管外壁紧密贴合，形成双重密封结构，法兰与外管焊接固定，管端衔接件与外管前端焊接且套设于内管外侧，使部件形成无相对位移的刚性整体，从而解决了扭矩管组件结构稳定性差且扭矩管容易泄露的技术问题，达到了扭矩管组件结构稳定性好且扭矩管不易泄露的技术效果。
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Figure CN224839076U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of instrumentation technology, and in particular to a torque tube float level gauge torsion bar assembly. Background Technology
[0002] In the production and application of torque tube float level gauges, the torque tube assembly is the core component that ensures the sealing performance and service life of the equipment. Its structural design and processing technology directly affect the product quality of the level gauge.
[0003] In the existing torque tube structure of level gauges, the core components are mostly composed of a torque tube, a lever, and external protective components, such as a housing or supporting steel pipe, which are assembled in a decentralized manner. The lever and the torque tube are often connected in an L-shape by means of shaft hole fitting, etc. One end of the torque tube is connected to the float to sense changes in buoyancy and generate torsion. The outside is protected by sealing and wrapping the housing or mounting the supporting steel pipe. Among them, the connection between the torque tube and the steel pipe, lever and other components mostly relies on threaded connection, and the gap at the connection is only filled by sealing gaskets, which makes the structural stability poor and the torque tube easy to leak.
[0004] In view of this, we provide a torque tube float level gauge torsion bar assembly to solve the above problems. Utility Model Content
[0005] The purpose of this application is to solve the technical problems of poor structural stability of torque tube assembly and easy leakage of torque tube. In order to solve the above technical problems, a torque tube float level gauge torsion bar assembly with good structural stability and easy leakage of torque tube is provided.
[0006] To achieve the above objectives, the embodiments of this application adopt the following technical solution: a torque tube type float level gauge torque bar assembly, comprising: an inner tube, which is hollow and disposed outside the torque tube; a transition sleeve disposed outside the torque tube, which is centrally disposed and sleeved on the outside of the torque tube, and the outer wall of the transition sleeve is welded to the inner tube; an outer tube, which is hollow and coaxially disposed with the inner tube, and the inner walls at both ends of the outer tube are provided with inwardly recessed stepped structures; a flange, the two ends of which are welded to the outer tube, and the flange is used for docking and fixing with external equipment; a sealing element, which is disposed at the end of the outer tube, and the sealing element is adapted to the stepped structure on the inner wall of the outer tube, and the sealing element is welded to the end of the outer tube; and a pipe end connector, which is hollow inside, disposed at the front end of the outer tube and sleeved on the outside of the inner tube, and the pipe end connector is welded to the outer tube.
[0007] Furthermore, according to an embodiment of this application, the radial dimension of the stepped structure is adapted to the radial dimension of the seal, and the seal is embedded in the stepped structure and welded to the outer tube as a whole.
[0008] Furthermore, according to the embodiments of this application, the inner wall of the seal is tightly fitted to the outer wall of the inner tube, and the seal simultaneously forms a double-fit seal with the stepped structure of the outer tube and the outer wall of the inner tube.
[0009] Furthermore, according to the embodiments of this application, the welding parts of the inner tube and the transition sleeve, and the welding parts of the outer tube and the flange and pipe end connector are all subjected to surface smoothing treatment to eliminate protrusions or depressions on the surface after welding.
[0010] Furthermore, according to an embodiment of this application, an annular space is reserved between the inner wall of the outer tube and the outer wall of the inner tube, and the annular space is used to avoid interference with the torque transmission of the torque tube.
[0011] Furthermore, according to an embodiment of this application, one end of the pipe end connector is provided with a fulcrum, and the fulcrum is connected to the pipe end connector by bolts.
[0012] Furthermore, according to an embodiment of this application, a shaft is provided at the upper end of the fulcrum, and a cross arm is provided at one end of the shaft, the cross arm being fixedly connected to the shaft by bolts.
[0013] Furthermore, according to an embodiment of this application, a positioning groove is provided on the end face of the flange facing the external equipment, and the positioning groove is used to assist the flange in accurately docking with the external equipment.
[0014] Furthermore, according to the embodiments of this application, the welding adopts a three-equal-match welding process.
[0015] Furthermore, according to an embodiment of this application, at least two flanges are provided, with the second flange covering the weld between the outer pipe and the seal.
[0016] Compared with the prior art, this application has the following beneficial effects: By setting the inner tube and outer tube as a coaxial structure, a double tubular support frame is formed, which improves the overall structural rigidity. An intermediate sleeve is added between the inner tube and the torque tube and fixed by welding to avoid interference caused by direct contact between the inner tube and the torque tube, thus ensuring the accuracy of torque transmission. The inner walls of both ends of the outer tube are provided with a stepped structure, so that the seal and the step can be fitted and welded into a whole. At the same time, the inner side of the seal is tightly fitted with the outer wall of the inner tube to form a double sealing structure. The flange is welded and fixed to the outer tube, and the tube end connector is welded to the front end of the outer tube and sleeved on the outside of the inner tube, so that the components form a rigid whole without relative displacement. This solves the technical problems of poor structural stability of the torque tube assembly and easy leakage of the torque tube, and achieves the technical effect of good structural stability of the torque tube assembly and easy leakage of the torque tube. Attached Figure Description
[0017] The present application will be further described below with reference to the accompanying drawings and embodiments.
[0018] Figure 1This is a schematic diagram of the structure of a torque tube float level gauge torsion bar assembly according to an embodiment of this application.
[0019] Figure 2 This is a left-side structural schematic diagram of a torque tube float level gauge torsion bar assembly according to an embodiment of this application.
[0020] In the attached diagram: 1. Seal; 2. Outer tube; 21. Stepped structure; 3. Inner tube; 31. Transition sleeve; 4. Torque tube; 5. Flange; 51. Positioning groove; 6. Pipe end connector; 7. Shaft; 8. Pivot point; 9. Cross arm. 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 torque tube 4 type float level gauge torque bar assembly, which includes: an inner tube 3, which is hollow and located outside the torque tube 4. A transition sleeve 31 is also provided outside the torque tube 4. The transition sleeve 31 is centrally located and sleeved on the outside of the torque tube 4, and the outer wall of the transition sleeve 31 is welded and fixed to the inner tube 3; an outer tube 2, which is hollow and coaxially arranged with the inner tube 3. The inner walls of both ends of the outer tube 2 are provided with inwardly recessed stepped structures 21; a flange 5, which is welded and fixed to the outer tube 2 at both ends and is used for docking and fixing with external equipment; a sealing element 1, which is located at the end of the outer tube 2 and is adapted to the stepped structure 21 on the inner wall of the outer tube 2. The sealing element 1 is welded and fixed to the end of the outer tube 2; and a pipe end connector 6, which is hollow inside and located at the front end of the outer tube 2 and sleeved on the outside of the inner tube 3. The pipe end connector 6 is welded and fixed to the outer tube 2.
[0026] By setting the inner tube 3 and the outer tube 2 as a coaxial structure 7, a double tubular support frame is formed, which improves the overall structural rigidity. An intermediate sleeve 31 is added between the inner tube 3 and the torque tube 4 and fixed by welding to avoid interference caused by direct contact between the inner tube 3 and the torque tube 4, and to ensure the accuracy of torque transmission. The inner walls of both ends of the outer tube 2 are provided with stepped structures 21, so that the sealing element 1 and the step are fitted and welded into a whole. At the same time, the inner side of the sealing element 1 is tightly fitted with the outer wall of the inner tube 3 to form a double sealing structure. The flange 5 is welded and fixed to the outer tube 2, and the pipe end connector 6 is welded to the front end of the outer tube 2 and sleeved on the outside of the inner tube 3, so that the components form a rigid whole without relative displacement. This solves the technical problems of poor structural stability of the torque tube 4 assembly and easy leakage of the torque tube 4, and achieves the technical effect of good structural stability of the torque tube 4 assembly and easy leakage of the torque tube 4. Example
[0027] like Figure 1 , 2As shown, the radial dimension of the stepped structure 21 is adapted to the radial dimension of the seal 1. The seal 1 is embedded in the stepped structure 21 and welded to the outer tube 2 as a whole. The inner wall of the seal 1 is tightly fitted to the outer wall of the inner tube 3, and the seal 1 forms a double-fit seal with both the stepped structure 21 of the outer tube 2 and the outer wall of the inner tube 3.
[0028] The inner wall of the outer tube 2 has an inwardly recessed stepped structure 21, whose radial dimensions are precisely matched with the radial dimensions of the seal 1, forming a fitting assembly base. The seal 1 can be embedded in the stepped structure 21 for initial positioning. At the same time, the inner side of the seal 1 can fit against the outer wall of the inner tube 3, constructing a three-layer connection structure from the outer tube 2 step to the seal 1 and then to the inner tube 3. During installation, the seal 1 is first processed to match the radial dimensions of the step, and the inner side of the seal 1 is tightly fitted against the outer side of the inner tube 3. Then, it is embedded into the outer tube 2 step and welded to fix it, so that the seal 1 and the outer tube 2 form a rigid whole. This strengthens the structural stability of the end of the outer tube 2 through size matching and welding, and forms a double seal by welding the seal 1 to the outer tube 2 step and fitting it against the inner tube 3, while taking into account the structural stability and leakage prevention of the component.
[0029] like Figure 1 , 2 As shown, the welding joints between the inner pipe 3 and the transition sleeve 31, and the welding joints between the outer pipe 2 and the flange 5 and the pipe end connector 6, are all surface-smoothed to eliminate any protrusions or depressions on the surface after welding. The welding adopts a three-equal-fit welding process.
[0030] The welding parts of the inner pipe 3 and the transition sleeve 31, the outer pipe 2 and the flange 5 and the pipe end connector 6 are all welded using the three-equal-matching welding process. This process ensures uniform distribution of welding stress and avoids structural deformation caused by local stress concentration by dividing the welding area into three equal sections along the circumference and welding them sequentially. After welding, the surface of each welded part is smoothed to eliminate the protrusions or depressions formed by welding, thereby improving the structural strength and stability of the connection between the components. The surface smoothing process also avoids the hidden dangers of stress concentration and sealing interference caused by uneven welding surfaces.
[0031] like Figure 1 , 2 As shown, an annular space is reserved between the inner wall of the outer tube 2 and the outer wall of the inner tube 3. The annular space is used to avoid interference with the torque transmission of the torque tube 4.
[0032] During the component assembly stage, the coaxial installation reference 7 of the inner tube 3 and the outer tube 2 is first determined. Based on the torque transmission characteristics and radial movement margin of the torque tube 4, the distance parameters between the outer wall of the inner tube 3 and the inner wall of the outer tube 2 are calculated and set. Then, the positioning assembly of the inner tube 3, the outer tube 2, the transition sleeve 31, and the tube end connector 6 is completed according to these parameters, so that a pre-defined annular space is naturally formed between them. The core function of this annular space is to provide an independent torque transmission environment for the torque tube 4, avoid direct contact between the inner tube 3 and the outer tube 2 and the torque tube 4 due to assembly errors or deformation under force, and isolate the torque tube 4 from the interference of factors such as vibration and temperature deformation of the inner and outer tubes 2, so as to ensure that the torque tube 4 can accurately transmit the torque signal corresponding to the change of float liquid level and ensure the measurement accuracy of the liquid level gauge.
[0033] like Figure 1 , 2 As shown, a fulcrum 8 is provided at one end of the pipe end connector 6, and the fulcrum 8 is connected to the pipe end connector 6 by bolts. A shaft 7 is provided at the upper end of the fulcrum 8, and a cross arm 9 is provided at one end of the shaft 7. The cross arm 9 is fixedly connected to the shaft 7 by bolts.
[0034] In the component assembly, the fulcrum 8 is first fastened to one end of the pipe end connector 6 with bolts to ensure that the position of the fulcrum 8 is accurate and the connection is stable. Then, the shaft 7 is assembled to the matching mounting position on the upper end of the fulcrum 8. Finally, the cross arm 9 is fixedly connected to one end of the shaft 7 with bolts to complete the linkage assembly of the fulcrum 8, the shaft 7 and the cross arm 9. The fulcrum 8 on the pipe end connector 6 provides a stable support reference for the shaft 7. The bolt connection method not only ensures the disassembly of the fulcrum 8, the shaft 7 and the cross arm 9 for later maintenance and adjustment, but also ensures the rigidity of the connection of each component, so that the shaft 7 and the cross arm 9 form a reliable torque transmission structure, which can accurately receive and transmit the torque signal output by the torque tube 4, providing a stable mechanical transmission foundation for the subsequent liquid level detection and signal conversion of the level gauge.
[0035] like Figure 1 , 2 As shown, the end face of flange 5 facing the external equipment is provided with a positioning groove 51, which is used to assist flange 5 in precise docking with the external equipment. At least two flanges 5 are provided, with the second flange 5 covering the weld between the outer pipe 2 and the seal 1.
[0036] In component assembly, flanges 5 with positioning grooves 51 are first fabricated according to design specifications. One flange 5 is welded to one end of the outer tube 2. Then, the sealing element 1 is welded to the other end of the outer tube 2. Finally, the second flange 5 is welded to the corresponding end of the outer tube 2, so that the flange 5 covers the weld between the outer tube 2 and the sealing element 1. When connecting to external equipment, the positioning groove 51 on the end face of the first flange 5 is adapted to the positioning structure of the external equipment to achieve precise alignment. In terms of function, the positioning groove 51 can quickly calibrate the installation position of the flange 5 and the external equipment, avoiding the impact of docking deviation on sealing and structural stability. In the double flange 5 design, the first flange 5 ensures precise docking with the external equipment, while the second flange 5 not only strengthens the structural strength of the end of the outer tube 2, but also isolates the welded area from external environmental corrosion by covering it, reducing the risk of leakage at the weld. This provides double protection for the docking accuracy and leak-proof performance of the component.
[0037] 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 torque tube type float level gauge torsion bar assembly, characterized in that, include: The inner tube is hollow and is located outside the torque tube. A transition sleeve is also provided outside the torque tube. The transition sleeve is centrally located and sleeved on the outside of the torque tube. The outer wall of the transition sleeve is welded and fixed to the inner tube. The outer tube is hollow and coaxial with the inner tube. The inner walls at both ends of the outer tube have inwardly recessed stepped structures. A flange, the two ends of which are welded and fixed to the outer pipe, is used for docking and fixing with external equipment; A sealing element is disposed at the end of the outer tube, the sealing element is adapted to the stepped structure of the inner wall of the outer tube, and the sealing element is welded and fixed to the end of the outer tube; A pipe end connector, the pipe end connector being hollow inside, the pipe end connector being disposed at the front end of the outer pipe and sleeved on the outside of the inner pipe, the pipe end connector being welded and fixed to the outer pipe.
2. The torque tube type float level gauge torsion bar assembly according to claim 1, characterized in that, The radial dimension of the stepped structure is adapted to the radial dimension of the seal, and the seal is embedded in the stepped structure and welded to the outer tube as a whole.
3. The torque tube type float level gauge torsion bar assembly according to claim 1, characterized in that, The inner wall of the seal is tightly fitted to the outer wall of the inner tube, and the seal simultaneously forms a double-fit seal with the stepped structure of the outer tube and the outer wall of the inner tube.
4. The torque tube type float level gauge torsion bar assembly according to claim 1, characterized in that, The welding joints between the inner tube and the transition sleeve, and the welding joints between the outer tube and the flange and the pipe end connector are all surface-smoothed to eliminate any protrusions or depressions on the surface after welding.
5. The torque tube type float level gauge torsion bar assembly according to claim 1, characterized in that, An annular space is reserved between the inner wall of the outer tube and the outer wall of the inner tube. The annular space is used to avoid interference with the torque transmission of the torque tube.
6. The torque tube type float level gauge torsion bar assembly according to claim 1, characterized in that, One end of the pipe end connector is provided with a fulcrum, and the fulcrum is connected to the pipe end connector by bolts.
7. The torque tube type float level gauge torsion bar assembly according to claim 6, characterized in that, A shaft is provided at the upper end of the fulcrum, and a cross arm is provided at one end of the shaft. The cross arm is fixedly connected to the shaft by bolts.
8. The torque tube type float level gauge torsion bar assembly according to claim 1, characterized in that, The flange has a positioning groove on its end face facing the external device, which helps the flange to accurately connect with the external device.
9. The torque tube type float level gauge torsion bar assembly according to claim 1, characterized in that, The welding process employs an outer three-equal-match welding technique.
10. The torque tube type float level gauge torsion bar assembly according to claim 1, characterized in that, At least two flanges are provided, with the second flange covering the weld between the outer pipe and the seal.