Magnetic torsion pressure conversion device

Abstract

The present invention discloses a magnetic torsion pressure conversion device, comprising two pressure chambers, two bellows covers, two connecting bolts, a center plate, a center axis and a magnetic torsion mechanism, wherein the diaphragm of the bellows cover is located in the pressure chamber, and the opening of the pressure chamber is sealed and connected to the chassis, the two bellows covers and the center plate are connected to form a sealed space by two connecting bolts, an axial magnet is arranged inside, and the torsion magnet of the magnetic torsion mechanism is driven by the magnetic force of the axial magnet. The present invention utilizes the magnetic characteristics to separate the torsion transmission mechanism from the pressure conversion chamber, reduce the probability of liquid leakage of the liquid level gauge, reduce the impact of the quality problem of the torque tube, save manufacturing costs, reduce the impact of the altitude, temperature, etc. on the liquid filled in the pressure conversion chamber, and improve the life and accuracy of the liquid level gauge.

Description

Technical Field

[0001] The invention relates to a force conversion device, in particular to a magnetic torsional pressure conversion device. Background Art

[0002] At present, due to the influence of the monitored object, in many cases, mechanical level gauges have to be used to monitor the quantity of raw materials. The current mechanical level gauges are prone to damage due to quality defects of torque components, overload use, etc. At the same time, the torque output unit is a dynamic sealing component, and due to the influence of altitude and temperature, the internal pressure will be too high, causing the torque output unit of the level gauge to leak and affect the measurement accuracy. This will not only lead to poor customer use results, but also increase the cost of manufacturers or customers. Summary of the invention

[0003] In order to solve the deficiencies of the prior art, the present invention provides a magnetic torsional pressure conversion device.

[0004] The technical solution adopted by the present invention to solve its technical problems is: a magnetic torsion pressure conversion device, characterized in that: it includes two pressure chambers, two bellows covers, two connecting bolts, a center plate, a center axis and a magnetic torsion mechanism, the bellows cover is welded in sequence by an annular chassis, several annular diaphragms and a cover plate; a chamber partition is welded on a certain diaphragm inside the bellows cover, and an isobaric through hole is provided on the chamber partition; a connecting shaft is provided at the center of the chamber partition on one side of the chassis, an axial hole is provided on the connecting shaft, and an internal thread is provided on the inner wall of the axial hole; an external pipe hole is provided on the pressure chamber; the center plate is provided with a horizontal center through hole, a vertical magnetic torsion hole and a longitudinal injection through hole, and the magnetic torsion hole is not connected with the center through hole and the injection through hole; one end of the injection through hole is connected with the center through hole, and the other end is provided with a sealing bolt; the connecting bolt is an inverted convex type and is provided with a horizontal bolt through hole; the two pressure chambers, the two bellows covers, the two connecting Bolts are respectively arranged on the left and right sides of the center plate; the diaphragm of the bellows cover is located in the pressure chamber, and the opening of the pressure chamber is sealed and connected to the chassis; the two bellows covers and the center plate are connected to form a sealed space by two connecting bolts; the center rod of the center axis passes through the bolt body through hole and the center through hole, and the two ends are respectively threadedly connected to the shaft hole, and an axis magnet is provided in the middle of the center axis; the lower limit disk of the magnetic torsion mechanism is fixed to the bottom of the magnetic torsion hole, and the upper limit disk is fixed to the opening of the magnetic torsion hole, and the magnetic torsion column is located between the lower limit disk and the upper limit disk; a magnetic torsion shaft is provided at the bottom of the magnetic torsion column, and the magnetic torsion shaft is located in the limit groove at the center of the lower limit disk; a torsion magnet is provided at the lower end of the magnetic torsion column, and is driven by the magnetic force of the axis magnet; a transmission rod is provided at the top of the magnetic torsion column, the transmission rod passes through the limit through hole in the center of the upper limit disk, and an anti-slip structure is provided at the upper end of the transmission rod.

[0005] Preferably, the center plate and connecting bolts are made of H62 brass.

[0006] Preferably, the chassis, diaphragm, partition and cover are all made of stainless steel, and the inner diameter of the chassis is slightly smaller than the inner diameter of the diaphragm, and the outer diameter is slightly larger than the outer diameter of the pressure chamber.

[0007] Preferably, the torsion magnet and the axial magnet are neodymium iron boron magnets, the outer diameter of the axial magnet is larger than the diameter of the bolt body through hole and slightly smaller than the inner diameter of the center through hole; the outer diameter of the torsion magnet is slightly smaller than the diameter of the magnetic torsion hole, and the cross-section of the center of the torsion magnet and the motion trajectory of the center of the axial magnet are located in the same plane.

[0008] Preferably, one side of the connecting end surface between the chassis and the pressure chamber, one side of the connecting end surface between the center plate and the chassis, and one side of the connecting end surface between the connecting bolt and the center plate are all provided with an annular groove, and a sealing ring is installed in the annular groove.

[0009] Preferably, buffer pad mounting grooves are respectively provided at opposite ends of the two connecting bolts.

[0010] Preferably, there are two groups of annular grooves on the left and right sides of the center plate, and an annular ventilation groove is provided between the two groups of annular grooves, and the ventilation groove is connected to the atmosphere through the ventilation hole.

[0011] Preferably, the anti-slip structure is an outer hexagonal prism.

[0012] The beneficial effects of the present invention are: 1) utilizing the magnetic characteristics, force conduction can be based on the non-contact principle, the torque transmission mechanism is separated from the pressure conversion chamber, and the probability of leakage of the liquid level gauge is significantly reduced; 2) using permanent magnets to replace the traditional torque tube, which reduces the impact of the torque tube quality problems and saves manufacturing costs; 3) the improvement of the bellows effectively reduces the impact of the liquid filled in the pressure conversion chamber on altitude, temperature, etc., and improves the measurement accuracy of the liquid level gauge. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of the present invention;

[0014] Figure 2 It is a schematic diagram of the structure of the bellows cover of the present invention;

[0015] Figure 3 It is a schematic diagram of the connecting bolt structure of the present invention;

[0016] Figure 4 It is a schematic diagram of the structure of the center plate of the present invention;

[0017] Figure 5 It is a schematic diagram of the central axis structure of the present invention;

[0018] Figure 6 It is a schematic diagram of the structure of the magnetic torsion mechanism of the present invention. DETAILED DESCRIPTION

[0019] The present invention will be further described below in conjunction with the accompanying drawings.

[0020] See also Figure 1 , 2 , 3, 4, 5, 6, a magnetic torsion pressure conversion device, comprising two pressure chambers 1, two bellows covers 2, two connecting bolts 3, a center plate 4, a center axis 5 and a magnetic torsion mechanism 6; the two pressure chambers 1, the two bellows covers 2, and the two connecting bolts 3 are respectively arranged on the left and right sides of the center plate 4.

[0021] The bellows cover 2 is welded in sequence by an annular chassis 21, several annular diaphragms 22, and a cover plate 23, and the inner ring surface of the annular chassis 21 is provided with an internal thread; the chassis 21, the diaphragm 22, and the cover plate 23 are all made of 316 stainless steel, the inner diameter of the annular chassis 21 is slightly smaller than the inner diameter of the diaphragm 22, and the outer diameter is slightly larger than the outer diameter of the pressure chamber 1; a chamber partition 24 is welded on the diaphragm 22 on the side of the cover plate 23 inside the bellows cover 2, and an isobaric through hole 26 is provided on the chamber partition 24; a connecting shaft 25 is provided at the center of the chamber partition 24 on one side of the chassis 21, and an axial hole 27 is provided on the connecting shaft 25, and an internal thread is provided on the inner wall of the axial hole 27.

[0022] The pressure chamber 1 is a cylindrical cover made of H62 brass, the cover wall is provided with an external pipe hole 11, and the pipe wall of the pipe hole 11 is provided with an internal thread.

[0023] The center plate 4 is a rectangular parallelepiped made of H62 brass, and is provided with a horizontal center through hole 41, a vertical magnetic twist hole 42 and a longitudinal injection through hole 43. The magnetic twist hole 42 is not connected to the center through hole 41 and the injection through hole 43; one end of the injection through hole 43 is connected to the center through hole 41, and the other end is provided with a sealing bolt 44; both ends of the center through hole 41 are provided with internal threads.

[0024] The connecting bolt 3 is made of H62 brass, is inverted convex and has an external thread; the connecting bolt 3 is provided with a transverse bolt body through hole 31, and the bolt body through hole 31 on the large end side of the connecting bolt 3 is hexagonal; the opposite ends of the two connecting bolts 3 are respectively provided with buffer pad installation grooves 32, with built-in buffer pads.

[0025] The diaphragm 22 of the bellows cover 2 is located in the pressure chamber 1, and the opening of the pressure chamber 1 is sealed and connected to the chassis 21, and an annular groove 7 is provided on one side of the connecting end surface of the chassis 21 and the pressure chamber 1; the two bellows covers 2 and the center plate 4 are connected to form a sealed space by two connecting bolts 3, and an annular groove 7 is provided on one side of the connecting end surface of the connecting bolts 3 and the center plate 4; two groups of annular grooves 7 are provided on one side of the connecting end surface of the center plate 4 and the chassis 21, and an annular ventilation groove 46 is also provided between the two groups of annular grooves 7, and the ventilation groove 46 is connected to the atmosphere through the ventilation hole 45.

[0026] The center rod 51 of the center shaft 5 passes through the bolt body through hole 31 and the center through hole 41. Both ends of the center rod 51 are provided with external threads, which are respectively threadedly connected with the shaft hole 27; the shaft magnet 52 in the middle of the center shaft 5 is a neodymium iron boron magnet, which is fixed by a bolt connector in the middle of the center rod 51; the outer diameter of the shaft magnet 52 is larger than the diameter of the bolt body through hole 31, and slightly smaller than the inner diameter of the center through hole 41, so as to ensure the fluidity of the internal filling liquid;

[0027] The lower limit plate 61 of the magnetic torsion mechanism 6 is fixed at the bottom of the magnetic torsion hole 42, and the upper limit plate 63 is fixed at the opening of the magnetic torsion hole 42, and the magnetic torsion column 62 is located between the lower limit plate 61 and the upper limit plate 63; a magnetic torsion axis 65 is provided at the bottom of the magnetic torsion column 62, and the magnetic torsion axis 65 is located in the limit groove 64 at the center of the lower limit plate 61; a torsion magnet 66 is provided at the lower end of the magnetic torsion column 62, and is driven by the magnetic force of the shaft magnet 52; the torsion magnet 66 is a neodymium iron boron magnet, the outer diameter of the torsion magnet 66 is slightly smaller than the diameter of the magnetic torsion hole 42, and the cross-section of the center of the torsion magnet 66 and the motion trajectory of the center of the shaft magnet 52 are located in the same plane.

[0028] A transmission rod 68 is provided on the top of the magnetic torsion column 62. The transmission rod 68 passes through the limiting through hole 67 in the center of the upper limit plate 63. An anti-skid structure 69 is provided on the upper end of the transmission rod 68. The anti-skid structure 69 is an outer hexagonal prism and is connected to the instrument display mechanism.

[0029] Sealing rings are installed in the annular grooves 7 of the chassis 21 , the connecting bolts 3 , and the center plate 4 , and mounting holes are also provided on the center plate 4 .

[0030] During assembly, a sealing ring is installed in the annular groove 7 of each component, and a buffer pad is installed in the buffer pad installation groove 32, and the center axis 5 is placed in the horizontal center through hole 41 of the center plate 4; the thin end of the connecting bolt 3 is screwed into the center through hole 41 on one side of the center plate 4 until it is tightened, and then the thick end of the connecting bolt 3 is screwed into the annular chassis 21 of the bellows cover 2 until it is tightened, and the end face of the chassis 21 is sealed and connected to the center plate 4; one end of the center rod 51 of the center axis 5 is threadedly connected to the shaft hole 27 for tightening; similarly, the connecting bolt 3 and the bellows cover 2 on the other side of the center plate 4 are installed to form a sealed cavity; the length of the center rod 51 of the center axis 5 is to keep the diaphragms 22 on the two bellows covers 2 in a natural state; the pitch of each connecting thread is consistent.

[0031] The pressure chamber 1 is installed on both sides of the center plate 4 by bolts, so that the opening of the pressure chamber 1 is sealed and connected to the chassis 21; the components of the magnetic torque mechanism 6 are installed in the vertical magnetic torque hole 42 of the center plate 4, so that the torsion magnet 66 and the shaft magnet 52 are magnetically connected.

[0032] When in use, the sealing cavity formed by the center plate 4, the connecting bolts 3 and the bellows cover 2 is filled with filling liquid through the longitudinal liquid injection hole 43 of the center plate 4, and the sealing bolt 44 is tightened; the anti-slip structure 69 of the magnetic torque mechanism 6 is connected to the torque amplification mechanism or the instrument display mechanism; according to requirements, the external pipe hole 11 of the pressure chamber 1 is respectively connected to the high and low pressure sources.

[0033] The filling liquid is mainly low-temperature resistant antifreeze liquid, which reduces the error of the device affected by temperature; the space between the chamber partition 24 and the cover plate 23 reduces the influence of the pressure on the volume of the antifreeze liquid on the diaphragm 22 at the end of the smaller center rod 51.

[0034] Magnetic button device working condition comparison table (pointer changes from 0-270°)

[0035] Axis magnet displacement Torque magnet rotation angle Torque amplification Pressure gauge value 0.5mm 0.6° 162 5 kPa 1mm 0.7° 189 15 kPa 2mm 0.8° 216 25 kPa 3mm 0.9° 243 35 kPa 4mm 0.10° 270 45 kPa 5mm 0.11° 297 55 kPa 6mm 0.12° 324 60 kPa

[0036] The above description is only a preferred implementation manner of the present invention, but the protection scope of the present invention is not limited thereto, and any modification and replacement based on the technical solution and inventive concept provided by the present invention should be included in the protection scope of the present invention.

Claims

1. A magnetic torsion pressure conversion device, characterized in that: It includes two pressure chambers, two bellows covers, two connecting bolts, a center plate, a center axis and a magnetic torsion mechanism, wherein the bellows cover is welded in sequence by an annular chassis, several annular diaphragms and a cover plate; a chamber partition is welded on a certain diaphragm inside the bellows cover, and an isobaric through hole is provided on the chamber partition; a connecting shaft is provided at the center of the chamber partition on one side of the chassis, an axial hole is provided on the connecting shaft, and an internal thread is provided on the inner wall of the axial hole; an external pipe hole is provided on the pressure chamber; the center plate is provided with a horizontal center through hole, a vertical magnetic torsion hole and a longitudinal injection through hole, and the magnetic torsion hole is not connected with the center through hole and the injection through hole; one end of the injection through hole is connected with the center through hole, and the other end is provided with a sealing bolt; the connecting bolt is an inverted convex type and is provided with a horizontal bolt through hole; the two pressure chambers, the two bellows covers and the two connecting bolts are respectively arranged in the center The left and right sides of the core plate; the diaphragm of the bellows cover is located in the pressure chamber, and the opening of the pressure chamber is sealed and connected to the chassis; the two bellows covers and the center plate are connected to form a sealed space by two connecting bolts; the center rod of the center axis passes through the bolt body through hole and the center through hole, and the two ends are respectively threadedly connected to the shaft hole, and an axis magnet is provided in the middle of the center axis; the lower limit disk of the magnetic torsion mechanism is fixed to the bottom of the magnetic torsion hole, and the upper limit disk is fixed to the opening of the magnetic torsion hole, and the magnetic torsion column is located between the lower limit disk and the upper limit disk; a magnetic torsion shaft is provided at the bottom of the magnetic torsion column, and the magnetic torsion shaft is located in the limit groove at the center of the lower limit disk; a torsion magnet is provided at the lower end of the magnetic torsion column, and is driven by the magnetic force of the axis magnet; a transmission rod is provided at the top of the magnetic torsion column, the transmission rod passes through the limit through hole in the center of the upper limit disk, and an anti-slip structure is provided at the upper end of the transmission rod.

2. A magnetic torsion pressure conversion device according to claim 1, characterized in that: The center plate and connecting bolts are made of H62 brass.

3. A magnetic torsion pressure conversion device according to claim 1, characterized in that: The chassis, diaphragm, partition plate and cover plate are all made of stainless steel, and the inner diameter of the chassis is slightly smaller than the inner diameter of the diaphragm, and the outer diameter is slightly larger than the outer diameter of the pressure chamber.

4. The magnetic torsion pressure conversion device according to claim 1, characterized in that: The torsion magnet and the axial magnet are neodymium iron boron magnets. The outer diameter of the axial magnet is larger than the diameter of the bolt body through hole and slightly smaller than the inner diameter of the center through hole. The outer diameter of the torsion magnet is slightly smaller than the diameter of the magnetic torsion hole, and the cross section of the center of the torsion magnet and the motion trajectory of the center of the axial magnet are located in the same plane.

5. The magnetic torsion pressure conversion device according to claim 1, characterized in that: An annular groove is provided on one side of the connecting end surface between the chassis and the pressure chamber, one side of the connecting end surface between the center plate and the chassis, and one side of the connecting end surface between the connecting bolt and the center plate, and a sealing ring is installed in the annular groove.

6. The magnetic torsion pressure conversion device according to claim 1, characterized in that: The opposite ends of the two connecting bolts are respectively provided with buffer pad installation grooves.

7. The magnetic torsion pressure conversion device according to claim 5, characterized in that: There are two groups of annular grooves on the left and right sides of the center plate, and an annular ventilation groove is provided between the two groups of annular grooves, and the ventilation groove is connected to the atmosphere through the ventilation hole.

8. The magnetic torsion pressure conversion device according to claim 1, characterized in that: The anti-slip structure is an outer hexagonal prism.

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