Novel torsion ring sensor and combined module

Abstract

The utility model discloses a novel torsion ring sensor, which relates to the metering field and comprises a top plate assembly, a novel torsion ring sensor, a bottom plate assembly and a horizontal limiting plate, the novel torsion ring sensor comprises a top ring, a strain area and a bottom ring, and flexible isolating rings are positioned on two sides of a rectangular section ring of the strain area and are integrally formed with the rectangular section ring of the strain area; the resistance strain gauges are fixed on the upper and lower planes of the strain area section ring. The utility model provides a novel torsion ring sensor and a combined module, which have the advantages of good torsion resistance and lateral resistance, high precision, small size, convenience in processing and mounting and the like.

Description

Technical Field

[0001] The utility model relates to the field of metrology, in particular to a novel torsion ring sensor and a combined module. Background Art

[0002] At present, there are many converter alloy scales in steel mills and batching scales in chemical plants. The market competition is relatively fierce, and there are characteristics such as high precision requirements, small measuring ranges, small installation spaces, great maintenance difficulties, and large vibrations in some occasions. General sensors such as columnar sensors cannot be installed due to installation space limitations. Cantilever beam sensors are prone to breakage in occasions with large vibrations and cannot meet the requirements either. To solve this problem, it is necessary to develop a high-precision and low-cost sensor and corresponding loading parts to adapt to the installation of electronic scales under such environmental conditions.

[0003] Chinese Patent Application Publication No. CN209416544U, with a publication date of September 20, 2019. The utility model discloses a high-precision circular plate sensor and a loading device, including a top plate, a high-precision circular plate sensor, a bottom plate, and a horizontal tie rod. The high-precision circular plate sensor includes an elastic body and a first strain group. A first counterbore is provided at the center of the upper surface of the elastic body, and a force-bearing boss is provided at the center of the bottom surface of the first counterbore. A second counterbore is provided at the center of the lower surface of the elastic body, and the diameter of the second counterbore is larger than the diameter of the force-bearing boss; the first strain group includes a plurality of first strain gauges, and the plurality of first strain gauges are fixed on the bottom surface of the second counterbore and are evenly distributed circumferentially along the axis of the second counterbore; a flat diaphragm is provided in the second counterbore, and the flat diaphragm is hermetically connected to the elastic body. The utility model provides a high-precision circular plate sensor and a loading device, which have the advantages of simple structure, small volume, easy processing, good sealing performance, etc. However, this patent has the problems that unilateral horizontal limit is prone to torsion, horizontal force will be generated after the pressure head is sleeved into the sensor loading cylinder and displaced, which affects weighing, and partial load is likely to occur after the arc surface at the sensor loading part is worn, and the installation and replacement are troublesome, and it does not have a built-in jacking function and needs to cooperate with an external jack. Summary of the Invention

[0004] In order to overcome the deficiencies in the prior art, the utility model provides a novel torsion ring sensor and a combined module. By combining the torsion ring sensor with the combined module, the torsion ring sensor has the advantages of anti-torsion, no influence on the weighing effect, no influence of partial load, good anti-lateral ability, high precision, small volume, easy processing and installation, etc.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A novel torsion ring sensor includes a top ring, a strain region, and a bottom ring; the top ring and the bottom ring are tightly connected to a flexible isolation ring, and a rectangular cross-section ring of the strain region is interspersed in the middle of the flexible isolation ring, and resistance strain gauges are fixed on the upper and lower planes of the rectangular cross-section ring of the strain region. The geometry of this novel torsion ring sensor is relatively simple, which is beneficial to machining and can achieve high dimensional and geometric accuracy. When a load acts on the loading point of the top ring, the elastic body deforms like a disc spring. Due to the uniqueness of the structure, the top ring can move parallel to the bottom ring. That is, under the action of the top ring and the bottom ring, the rectangular cross-section ring-shaped rotating body makes a rolling-like movement towards the center direction, causing the lower surface of the ring to move towards the direction of increasing radius and the upper surface of the ring to move towards the direction of decreasing radius, generating circumferential positive and negative strains, which are exactly what is required to form a Wheatstone bridge. The strain gauges pasted on the upper and lower planes form a bridge. After being subjected to torsional deformation under an external load, the resistance values of the resistance strain gauges increase or decrease accordingly, and as a result, an unbalanced output proportional to the load is generated on the diagonal of the bridge. Using this characteristic, weighing can be completed. At the same time, the upper and lower strain regions have a large space, and good protection can be achieved after filling with glue and welding for sealing.

[0007] Preferably, the upper surface of the top ring is the loading point; the flexible isolation ring is tightly connected to the rectangular cross-section ring of the strain region. When a force acts on the loading point, through the action of the inner and outer flexible isolation rings, the upper and lower surfaces of the rectangular cross-section ring-shaped rotating body move towards the directions of decreasing and increasing plane radii respectively. Even in the case of eccentric loading, the influence on the rectangular cross-section ring of the strain region is greatly reduced under the action of the flexible isolation ring.

[0008] Preferably, there are 8 resistance strain gauges, and 4 are evenly fixed on each of the upper and lower planes of the rectangular cross-section ring of the strain region. When loaded, the cross-sectional area of the strain region does not change, with good inherent linearity and high accuracy, which is incomparable to other structural elastic elements.

[0009] Preferably, the widths of both ends of the cross-section of the flexible isolation ring are greater than the width of the middle part, and the middle part of the cross-section of the flexible isolation ring has an arc.

[0010] Preferably, a combined module adapted to the novel torsion ring sensor includes the novel torsion ring sensor, and also includes a top plate assembly, a bottom plate assembly, and a horizontal limiting plate; a loading indenter is installed on the lower surface of the top plate assembly, and the top plate assembly is connected to two support blocks and extends to two support screws and adjusting nuts connected to the bottom plate assembly; there are two horizontal limiting plates, one end of which is connected to the limiting block of the top plate assembly and the other end is connected to the limiting block of the bottom plate assembly, and they are distributed on both sides of the module; the novel torsion ring sensor is arranged in the enclosed area of several positioning pins on the bottom plate assembly. The novel torsion ring sensor is placed in the positioning pins on the bottom plate assembly, which is convenient for installation.

[0011] Preferably, the support block, support screw, and adjusting nut are combined. Through nut adjustment, the functions of overload and anti-overturn protection can be achieved, and the top plate assembly can also be lifted without the need for external equipment, playing the role of supporting the prosthesis and facilitating the replacement of the sensor.

[0012] Preferably, the two horizontal limit plates are made of long strip-shaped steel sheets, and are respectively connected to the limit blocks of the top plate assembly and the bottom plate assembly by bolts, and are symmetrically distributed on both sides of the module. The long strip-shaped steel sheets have a certain flexible deformation, which can effectively eliminate the influence of horizontal force and torsion without affecting the output in the vertical direction, and the double horizontal limit structure is more stable and reliable.

[0013] Preferably, positioning pins are provided on the bottom plate assembly, and the new torsion ring sensor is placed between the positioning pins on the bottom plate assembly. The loading part of the top ring is matched with the arc surface loading press head. The loading press head does not sleeve into the sensor loading cylinder, which can effectively avoid the influence of horizontal force generated after the module is twisted.

[0014] Compared with the prior art, the advantages of the utility model patent are as follows: (1) The sensor has high precision and is not affected by eccentric load and wear; (2) It has the functions of overload and anti-overturn protection; (3) It has the function of replacing the jack, playing the role of supporting the prosthesis and facilitating the replacement of the sensor; (4) The special double horizontal limit design is adopted, which can effectively eliminate the influence of horizontal and torsional forces. Description of the Drawings

[0015] Figure 1 It is a schematic diagram of the sensor structure of the utility model.

[0016] Figure 2 It is the view in the direction of A of the sensor of the utility model.

[0017] Figure 3 It is a schematic diagram of the structure of the torsion ring sensor combination module of the utility model.

[0018] Figure 4 It is a side view of the torsion ring sensor combination module of the utility model.

[0019] Figure 5 It is a top view of the torsion ring sensor combination module of the utility model.

[0020] In the figure: 1. Roof plate assembly, 1.1 Roof plate, 1.2 Support block, 1.3 Loading indenter, 1.4 Upper limit plate, 1.5 Limit block fixing screw, 1.6 Support screw, 1.7 Adjusting nut; 2. Bottom plate assembly, 2.1 Bottom plate, 2.2 Positioning pin, 2.3 Lower limit plate; 3. Horizontal limit plate; 4. New type torsion ring sensor, 4.1 Top ring, 4.2 Strain area, 4.3 Bottom ring, 4.4 Flexible isolation ring, 4.5 Strain area rectangular cross-section ring, 4.6 Strain gauge. Detailed implementation mode

[0021] The following further describes the present utility model in conjunction with the attached drawings and specific embodiments.

[0022] Embodiment 1: A new type of torsion ring sensor and combination module in this embodiment is an integral rotary body structure with a relatively simple geometric shape, which is conducive to machining and can achieve high dimensional and form tolerances. It is mainly composed of three parts: a top ring, an intermediate rectangular cross-section ring, and a bottom ring. Flexible isolation rings are arranged on both sides of the intermediate rectangular cross-section ring. When a load acts on the cylindrical surface of the top ring, the elastic body deforms like a disc spring. Due to the uniqueness of the structure, the top ring can move parallel to the bottom ring. That is, under the action of the top ring and the bottom ring, the rectangular cross-section ring-shaped rotary body makes a rolling-like movement towards the center, causing the lower surface of the ring to move in the direction of decreasing radius and generating circumferential positive and negative strains, which are exactly what is required to form a Wheatstone bridge. The strain gauges are pasted on the upper and lower planes to form a bridge. After torsional deformation occurs under the action of an external load, the resistance value of the resistance strain gauge increases or decreases accordingly. As a result, an unbalanced output proportional to the load is generated on the diagonal of the bridge. Using this characteristic, weighing can be completed. At the same time, the upper and lower strain areas have a large space, and good protection can be achieved after filling with glue and welding for sealing. Flexible isolation rings are provided on both sides of the strain area. When a force acts on the bearing head, the strain area rectangular cross-section ring, through the action of the inner and outer flexible isolation rings, makes the upper and lower surfaces of the rectangular cross-section ring rotary body move in the directions of decreasing and increasing plane radii respectively. Even if there is an eccentric load, the influence on the strain area rectangular body is greatly reduced under the action of the isolation ring. The resistance strain gauges are symmetrically distributed on the upper and lower planes of the strain area rectangular block. When loaded, the cross-sectional area of the strain area does not change, so it has good linearity and high accuracy, which are incomparable to other structural elastic elements.

[0023] Such as Figure 1 And Figure 2As shown in the figure, the new torsion ring sensor mainly consists of a top ring 4.1, a strain area 4.2, and a bottom ring 4.3. The strain area 4.2 is composed of a flexible isolation ring 4.4 and a rectangular cross-section ring 4.5. The top ring is set at the center of the top surface of the bottom ring, and the bottom ring is set at the bottom end of the whole new torsion ring sensor. There is a recess in the center of the bottom ring, and the top ring is inserted into the recess. The two sides of the top ring are connected with a rectangular cross-section ring. The connecting part between the rectangular cross-section ring and the top ring is arc-shaped, and the width of the arc-shaped connecting part decreases from the top ring to the rectangular cross-section ring. The rectangular cross-section ring includes two rectangular area parts with a rectangular cross-section. There is also an arc-shaped connecting part between the two rectangular area parts. A flexible isolation ring is wound around the outside of the arc-shaped connecting part between the left side of the top ring and the rectangular cross-section ring. A strain area is provided on the outside of the right side of the top ring and the rectangular cross-section ring. When a load acts on the top ring 4.1, the elastic body deforms like a disc spring. Due to the uniqueness of the structure, the top ring 4.1 can move parallel to the bottom ring 4.3. That is, under the action of the top ring 4.1 and the bottom ring 4.3, the rectangular cross-section ring 4.5 rotates towards the center direction in a rolling-like motion, making the lower surface of the ring move towards the direction of increasing radius and the upper surface of the ring move towards the direction of decreasing radius, generating positive and negative circumferential strains, which are exactly what is needed to form a Wheatstone bridge. The strain gauges 4.6 are pasted on the upper and lower planes to form a bridge. After being twisted and deformed under the action of an external load, the resistance value of the strain gauges 4.6 increases or decreases accordingly. As a result, an unbalanced output proportional to the load is generated on the diagonal of the bridge. Using this characteristic, weighing can be completed.

[0024] As Figure 3 , Figure 4 and Figure 5As shown in the figure, the new torsion ring sensor combination module is composed of a top plate assembly 1, a bottom plate assembly 2, a horizontal limit plate 3, and a new torsion ring sensor 4. The top plate assembly 1 includes a top plate 1.1, a loading indenter 1.3 at the center of the lower surface of the top plate 1.1, two upper limit blocks 1.4 (welded and fixed to the top plate) distributed diagonally, and two support blocks 1.2 symmetrically distributed on both sides (the support blocks are made of steel plates folded into a U shape and welded to the top plate 1.1). Two support screws 1.6 are inserted through the two support blocks 1.2 and extend to be connected to the bottom plate assembly 2. Two adjusting nuts 1.7 are installed on the two support screws 1.6 and are located between the bottom plate assembly 2 and the two support blocks 1.2. By adjusting the support screws 1.6 and the adjusting nuts 1.7, the functions of overload and anti-overturning protection can be achieved, and the top plate assembly can also be lifted without the aid of external equipment, which plays a role in supporting the prosthesis and facilitating the replacement of the sensor. The limit block fixing screw 1.5 is used to fix the horizontal limit plate 3. The bottom plate assembly 2 includes a bottom plate 2.1 and two lower limit blocks 2.3 (welded and fixed to the bottom plate) distributed diagonally on the upper surface of the bottom plate. One end of the two horizontal limit plates 3 (a thin plate with a certain degree of freedom of deformation and not affected by external forces in all directions) is connected to the upper limit block 1.4 of the top plate assembly 1, and the other end is connected to the lower limit block 2.3 of the bottom plate assembly 2, and they are symmetrically distributed on both sides in the length direction of the module. The new torsion ring sensor 4 is placed between three positioning pins 2.2 on the bottom plate assembly 2, and the loading part is matched with the arc surface loading indenter 1.3. The loading indenter is not sleeved into the sensor, which can effectively avoid the influence of the horizontal force generated after the module is twisted. The new torsion ring sensor in this embodiment can achieve the following technical effects: high precision, not affected by eccentric load and wear; having the functions of overload and anti-overturning protection; having the function of replacing a jack, playing a role in supporting the prosthesis and facilitating the replacement of the sensor; adopting a specially designed double horizontal limit, which can effectively eliminate the influence of horizontal and torsional forces.

[0025] Embodiment 2: In this embodiment, a novel torsion ring sensor and a combined module are provided. It is an integral rotary body structure with a relatively simple geometric shape, which is beneficial to machining and can achieve high dimensional and geometric tolerances. It is mainly composed of a top ring, an intermediate rectangular cross-section ring, and a bottom ring. Flexible isolation rings are provided on both sides of the intermediate rectangular cross-section ring. When a load acts on the cylindrical surface of the top ring, the elastic body deforms like a disc spring. Due to the uniqueness of the structure, the top ring can move parallel to the bottom ring. That is, under the action of the top ring and the bottom ring, the rectangular cross-section ring-shaped rotary body makes a rolling-like movement towards the center direction, causing the lower surface of the ring to move in the direction of decreasing radius and generating circumferential positive and negative strains, which are exactly what is required to form a Wheatstone bridge. The strain gauges are pasted on the upper and lower planes to form a bridge. After torsional deformation occurs under the action of an external load, the resistance value of the resistance strain gauge increases or decreases accordingly, and as a result, an unbalanced output proportional to the load is generated on the diagonal of the bridge. Using this characteristic, weighing can be completed. At the same time, the upper and lower strain areas have a large space, and good protection can be achieved after filling with glue and welding for sealing; flexible isolation rings are provided on both sides of the strain area. When a force acts on the load-bearing head, through the action of the inner and outer flexible isolation rings, the upper and lower surfaces of the rectangular cross-section ring-shaped rotary body in the strain area move in the directions of decreasing and increasing plane radius respectively. Even if there is an eccentric load, the influence on the rectangular body in the strain area is greatly reduced under the action of the isolation ring; the resistance strain gauges are symmetrically distributed on the upper and lower planes of the rectangular block in the strain area. When loaded, the cross-sectional area of the strain area does not change, and it has good linearity and high accuracy, which are incomparable to other structural elastic elements.

[0026] Such as Figure 1 And Figure 2As shown in the figure, the new torsion ring sensor mainly consists of a top ring 4.1, a strain area 4.2, and a bottom ring 4.3. The strain area 4.2 is composed of a flexible isolation ring 4.4 and a rectangular cross-section ring 4.5. The top ring is set at the center of the top surface of the bottom ring, and the bottom ring is set at the bottom end of the entire new torsion ring sensor. There is a recess at the center of the bottom ring, and the top ring is inserted into the recess. Rectangular cross-section rings are connected to both sides of the top ring, and the connecting part between the rectangular cross-section ring and the top ring is arc-shaped, and the width of the arc-shaped connecting part decreases from the top ring to the rectangular cross-section ring. The rectangular cross-section ring includes two parts with rectangular cross-section areas, and there is also an arc-shaped connecting part between the two rectangular area parts. A flexible isolation ring surrounds the outside of the arc-shaped connecting part between the left side of the top ring and the rectangular cross-section ring. There is a strain area outside the right side of the top ring and the rectangular cross-section ring. When a load acts on the top ring 4.1, the elastic body deforms like a disc spring. Due to the uniqueness of the structure, the top ring 4.1 can move parallel relative to the bottom ring 4.3. That is, under the action of the top ring 4.1 and the bottom ring 4.3, the rectangular cross-section ring 4.5 rotates towards the center direction in a motion similar to rolling, causing the lower surface of the ring to move in the direction of increasing radius and the upper surface of the ring to move in the direction of decreasing radius, generating positive and negative circumferential strains, which are exactly what is needed to form a Wheatstone bridge. The strain gauges 4.6 are pasted on the upper and lower planes to form a bridge. After being subjected to torsional deformation under an external load, the resistance value of the strain gauges 4.6 increases or decreases accordingly, and as a result, an unbalanced output proportional to the load is generated on the diagonal of the bridge. Using this characteristic, weighing can be completed.

[0027] A combined module includes a top plate assembly, a new type of torsion ring sensor, a bottom plate assembly, and horizontal limit plates. The top plate assembly includes a top plate, a loading indenter at the center of the lower surface of the top plate, two upper limit blocks distributed diagonally, and two support blocks symmetrically distributed on both sides. Two support screws are inserted through the two support blocks and extend to be connected to the bottom plate assembly. Two adjusting nuts are installed on the two support screws and are located between the bottom plate assembly and the two support blocks. The bottom plate assembly includes a bottom plate and two lower limit blocks distributed diagonally on the upper surface of the bottom plate. One end of the two horizontal limit plates is connected to the limit blocks of the top plate assembly, and the other end is connected to the limit blocks of the bottom plate assembly, and they are symmetrically distributed on both sides of the module. The new type of torsion ring sensor is placed between three positioning pins on the bottom plate, and the loading part is matched with the loading indenter. The support blocks, support screws, and adjusting nuts are combined together. Through nut adjustment, the functions of overload and anti-overturn protection can be achieved, and the top plate assembly can also be lifted without the help of external equipment, playing the role of supporting the prosthesis and facilitating the replacement of the sensor. The two horizontal limit plates are made of thin, narrow steel plates, and are respectively connected to the limit blocks of the top plate assembly and the bottom plate assembly through bolts, and are symmetrically distributed on both sides of the module. The thin and narrow steel plates have a certain flexible deformation, which can effectively eliminate the influence of horizontal force and torsion without affecting the vertical direction output. The double horizontal limit structure is more stable and reliable. The loading indenter does not sleeve into the sensor loading cylinder, which can effectively avoid the influence of horizontal force generated after the module is twisted. There are 8 resistance strain gauges, which are symmetrically distributed on the upper plane and the lower plane of the rectangular ring in the strain area. When loaded, the cross-sectional area of the strain area does not change, and it has good inherent linearity and high accuracy, which is incomparable to other structural elastic elements.

[0028] Different from Embodiment 1, in this embodiment, an adjusting block is provided between the top plate and the support block. On the basis of ensuring the stability of the fixation between the two support blocks and the top plate through the adjusting block, the adjusting block can endow a certain flexibility between the top plate and the support block, so that the module will not affect the self-rigidity of the housing during the twisting process, and improve the service life of the new type of torsion ring sensor combined module. The new type of torsion ring sensor in this embodiment can achieve the following technical effects: high precision, not affected by eccentric load and wear; having the functions of overload and anti-overturn protection; having the function of replacing a jack, playing the role of supporting the prosthesis and facilitating the replacement of the sensor; adopting a specially designed double horizontal limit, which can effectively eliminate the influence of horizontal and torsional forces. In addition to the above effects, the adjusting block provided between the support block and the top plate in this embodiment makes the support block and the top plate take into account flexibility and rigidity, so that the new type of torsion ring sensor combined module can always maintain its own structural characteristics and stability during the twisting process.

Claims

1. A novel twist ring sensor (4), characterized in that: It comprises a top ring (4.1), a strain region (4.2) and a bottom ring (4.3); the top ring (4.1) and the bottom ring (4.3) are tightly connected to a flexible isolation ring (4.4); a strain region rectangular cross-section ring (4.5) is inserted in the middle of the flexible isolation ring (4.4); and resistance strain gauges (4.6) are fixed on the upper and lower planes of the strain region rectangular cross-section ring (4.5).

2. A novel twist ring sensor (4) according to claim 1, characterized in that: The upper surface of the top ring (4.1) is the loading point; the flexible isolation ring (4.4) is tightly connected to the strain zone rectangular cross-section ring (4.5).

3. A novel torsion ring sensor (4) according to any one of claims 1 or 2, characterized in that: There are 8 resistance strain gauges (4.6), 4 of which are evenly fixed on the upper plane and the lower plane of the rectangular cross-section ring (4.5) in the strain zone.

4. A novel twist ring sensor (4) according to claim 1, characterized in that: The widths of the two ends of the cross section of the flexible isolation ring (4.4) are greater than the width of the middle portion, and the middle portion of the cross section of the flexible isolation ring (4.4) is arc-shaped.

5. A combination module of a torsion ring sensor, adapted for the novel torsion ring sensor according to any one of claims 1 to 4, characterized in that: It comprises a novel torsion ring sensor (4) as described in any one of claims 1 to 4, and also comprises a top plate assembly (1), a bottom plate assembly (2) and a horizontal limit plate (3); a loading pressure head (1.3) is mounted on the lower surface of the top plate assembly (1), the top plate assembly (1) is connected to two support blocks (1.2) and extends to two support screws (1.6) and an adjusting nut (1.7) connected to the bottom plate assembly (2); the horizontal limit plate (3) has two ends, one end of which is connected to the limit block (1.4) of the top plate assembly (1) and the other end is connected to the limit block (2.3) of the bottom plate assembly (2), and is distributed on both sides of the module; the novel torsion ring sensor (4) is arranged in the enclosed area of ​​a plurality of positioning pins (2.2) on the bottom plate assembly (2).

6. A combination module of a torsion ring sensor according to claim 5, characterized in that: The support block (1.2), the support screw rod (1.6) and the adjusting nut (1.7) are combined together, and the jacking top plate assembly is adjusted by the nut.

7. A combination module of a torsion ring sensor according to claim 5, characterized in that: The two horizontal limit plates (3) are made of long steel sheets, and their two ends are respectively connected to the limit blocks of the top plate assembly (1) and the bottom plate assembly (2) by bolts, and are symmetrically distributed on both sides of the module.

8. A combination module of a torsion ring sensor according to claim 7, characterized in that: The base plate assembly (2) is provided with positioning pins (2.2), the novel torsion ring sensor (4) is placed between the positioning pins on the base plate assembly (2), and the loading position of the top ring (4.1) matches with the arc surface loading pressure head (1.3).

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