An IO-Link vibrating rod level switch

Abstract

The present invention relates to the field of volume measurement technology, and specifically to an IO-Link vibrating rod level switch, comprising a housing, and also comprising a vibrating probe, the vibrating probe comprising an outer tube and an inner tube and a vibrating rod threadedly connected to the inner tube, the inner wall of the inner tube being provided with a spiral guide groove; an adjusting component, the adjusting component comprising a turntable and a limit sleeve arranged in the inner tube, a locking screw threadedly connected to the vibrating rod being slidably mounted on the turntable, a spring spring being provided between the locking screw and the turntable, and a limit clamping tooth being provided on the limit sleeve; and a movable sleeve rotatably mounted on the top of the turntable and slidably connected to the limit sleeve, a limit bar for limiting the locking screw from being separated from the turntable being provided at the bottom of the movable sleeve, an elastic airbag 1 being provided in the movable sleeve, a rack connected to the elastic airbag 1 being slidably mounted on the movable sleeve, and used for pushing the limit bar to limit the locking screw from being separated when the elastic airbag 1 is pressurized and expanded, and pushing the rack to cooperate with the limit clamping tooth to limit the turntable from descending. The present invention has good stability performance, thereby improving the detection accuracy.

Description

Technical Field

[0001] The invention relates to the technical field of volume measurement, and in particular to an IO-Link vibrating rod material level switch. Background Art

[0002] The vibrating rod of the vibrating rod level switch is an electronic circuit that excites and maintains resonance. When the measured medium reaches and partially covers the probe of the vibrating rod switch, the vibration damping of the vibrating rod switch suddenly increases. This change in vibration parameters will trigger the relay through the detection circuit, thereby providing upper and lower limit switch signals for level control.

[0003] The vibrating rod level switch is a switch-type sensor used to detect the position of granular and powdered material levels. At present, the vibrating rod used to detect materials in the vibrating rod level switch is mostly installed with the vibration probe by threaded connection. For example, the patent published on the China Patent Network with the announcement number: CN217560747U discloses a vibrating rod switch for detecting the material position. The vibrating rod and the external vibration tube are connected by threaded connection. Although it is convenient for installation, disassembly and maintenance, when the vibration probe works for a long time, the vibrating rod and the external vibration tube will become loose, resulting in reduced sensitivity and even incorrect judgment of the material level. Summary of the invention

[0004] In view of the above-mentioned shortcomings of the prior art, the present invention provides an IO-Link vibrating rod level switch, which can effectively solve the problem in the prior art that the vibrating rod and the vibrating probe are easy to loosen, resulting in reduced detection accuracy and generation of erroneous signals.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0006] The present invention provides an IO-Link vibrating rod material level switch, comprising a housing, and further comprising:

[0007] A vibration probe, the vibration probe comprising an outer tube and an inner tube and a vibration rod threadedly connected to the inner tube, the inner wall of the inner tube being provided with a spiral guide groove;

[0008] An adjusting component, the adjusting component comprises a turntable movably arranged in the inner tube for sliding in the spiral guide groove when lifting and lowering, and a limit sleeve arranged in the inner tube, a locking screw threadedly connected to the vibrator rod is slidably mounted on the turntable, and a spring is arranged between the locking screw and the turntable for winding up the spring when the locking screw pushes the turntable to rise, and a limit tooth is arranged on the limit sleeve;

[0009] And a movable sleeve is rotatably installed on the top of the turntable and slidably connected to the limit sleeve, and a limit bar is provided at the bottom of the movable sleeve for limiting the separation of the locking screw from the turntable, an elastic air bag is provided in the movable sleeve, and a rack connected to the elastic air bag is slidably installed on the movable sleeve, which is used to push the limit bar to limit the separation of the locking screw and push the rack to cooperate with the limit tooth to limit the descending of the turntable when the elastic air bag is pressurized and expanded.

[0010] Furthermore, a communication module is provided in the casing, and the communication module communicates based on the IO-Link protocol.

[0011] Furthermore, a shaft sleeve is coaxially mounted on the turntable, and two ends of the spring are respectively connected to the outer circumference of the shaft sleeve and the inner circumference of the turntable, and the spring is wound when the turntable and the shaft sleeve rotate relative to each other.

[0012] Furthermore, a connecting block is provided on the top of the locking screw, and the connecting block is in the shape of a polygon and is slidably connected to the sleeve, and is used to limit the rotation of the sleeve when the turntable rotates to achieve the winding of the clockwork spring. A limit platform is provided on the top of the connecting block to limit the connection block from disengaging from the turntable.

[0013] Furthermore, a ball bearing is provided between the turntable and the movable sleeve to reduce rotational friction. The limit bar is slidably arranged on the movable sleeve, and a spring is provided between the limit bar and the movable sleeve to drive the limit bar so that its sliding direction is always toward the side away from the limit platform. A pressure strip that cooperates with the limit bar is slidably installed on the movable sleeve, and the sliding direction of the pressure strip is parallel to the connecting block and toward the elastic airbag 1, so that the elastic airbag 1 is compressed and expanded and the pressure strip is squeezed to drive the limit bar to extend toward the limit platform, thereby limiting the locking screw from being separated from the turntable.

[0014] Furthermore, the limit platform is connected to the connecting block through a connecting rod, and the height of the connecting rod is greater than the thickness of the limit strip and less than the distance between the elastic airbag and the turntable, so that after the turntable is limited, the connecting block cooperates with the vibrator to descend when following the rotation of the shaft sleeve.

[0015] Furthermore, it also includes an elastic member, which is located between the bottom of the elastic airbag and the movable sleeve, and is used to support the elastic airbag that is not squeezed and drive the pressure strip to separate from the limiting strip.

[0016] Furthermore, it also includes elastic airbag 2, which is sleeved on the inner tube, and the inner tube is provided with a connecting tube connected to the elastic airbag 1, and the outer tube is provided with a pressure relief valve connected to the elastic airbag 2.

[0017] Furthermore, an auxiliary part is included, wherein the vibrator is provided with a threaded groove that cooperates with the locking screw, and the external thread on the locking screw has an opposite spiral direction to the external thread on the vibrator. The auxiliary part consists of a push rod and a spring movably installed in the threaded groove on the vibrator, and the spring is sleeved on the push rod and presses against the vibrator, so as to always push the push rod against the bottom of the locking screw to offset the pressure on the locking screw when the elastic airbag expands.

[0018] Beneficial Effects

[0019] Compared with the known prior art, the technical solution provided by the present invention has the following beneficial effects:

[0020] 1. The locking screw and the turntable are squeezed and raised by connecting the vibrating rod with the inner tube thread, and the turntable and the elastic airbag are squeezed by the spiral guide groove and the movable sleeve. The expanded elastic airbag squeezes the rack and the limit bar to limit the movable sleeve and the locking screw. The turntable rises and rotates at the same time, and the locking screw is automatically connected with the vibrating rod thread by the spring spring. The locking screw and the vibrating rod with opposite spiral directions of the external thread are matched to realize self-locking, so that the vibrating rod is not easy to loosen during long-term vibration, and the stability performance is good, thereby improving the detection accuracy;

[0021] Second, the elastic airbag 2 is connected with the elastic airbag 1. After the elastic airbag 1 is squeezed, the gas is introduced into the elastic airbag 2 to seal the gap between the outer tube and the inner tube, thereby improving the sealing performance. When detecting the height of the material in the liquid and the height of the dust-like material in the container, it can effectively prevent the erosion of dust and water vapor on the equipment and protect the parts well.

[0022] 3. The auxiliary part is used to press against the bottom of the locking screw, thereby reducing the pressure of the elastic airbag squeezing the limit platform when it expands, thereby reducing the pressure and friction between the locking screw and the vibrator. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the prior art descriptions. Obviously, the drawings described below are only some embodiments of the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0024] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0025] Figure 2 It is a partial cross-sectional view of the present invention;

[0026] Figure 3 for Figure 2 The enlarged view of point A in the middle;

[0027] Figure 4 It is a partial connection diagram of the locking screw and the rotating disk of the present invention;

[0028] Figure 5 It is a partial connection schematic diagram of the elastic airbag 1 and the limiting sleeve of the present invention;

[0029] Figure 6 It is a schematic diagram of the connection between the auxiliary component and the vibrating rod of the present invention.

[0030] Attached to the drawing are: 1. housing; 2. vibration probe; 21. outer tube; 22. inner tube; 221. spiral guide groove; 23. vibration rod; 24. elastic airbag 2; 241. connecting pipe; 25. adjustment assembly; 251. turntable; 252. bushing; 253. clockwork spring; 254. movable sleeve; 2541. rack; 255. elastic airbag 1; 256. elastic part; 257. pressure strip; 258. limit strip; 259. limit sleeve; 2591. limit tooth; 26. locking screw; 261. connecting block; 262. limit platform; 27. auxiliary part. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] The present invention will be further described below in conjunction with the embodiments.

[0033] Example:

[0034] An IO-Link vibrating rod level switch, see attached Figure 1-6 , including a housing 1, in which a piezoelectric device and a communication module are arranged, and the communication module communicates based on the IO-Link protocol. IO-Link utilizes standard 3-wire power, signal and ground wires to transmit data, and has the capability of high-speed transmission and remote configuration, making equipment integration and maintenance simpler and faster, while providing accurate and reliable data transmission and reducing the possibility of errors and interference.

[0035] The vibrating probe 2 includes an outer tube 21, an inner tube 22 and a vibrating rod 23 threadedly connected to the inner tube 22, and a spiral guide groove 221 is provided on the inner wall of the inner tube 22;

[0036] The adjusting component 25 includes a turntable 251 movably arranged in the inner tube 22 for sliding in the spiral guide groove 221 during lifting and lowering. Two groups of guide rods are symmetrically installed on the outer circumference of the turntable 251, and the guide rods extend into the spiral guide groove 221. When the turntable 251 is squeezed and raised, the two groups of guide rods slide in the spiral guide groove 221, and the push received by the turntable 251 is converted into driving its rotation. A locking screw 26 threadedly connected to the vibration rod 23 is slidably installed on the turntable 251, and a clockwork spring 253 is provided between the locking screw 26 and the turntable 251, so that when the locking screw 26 pushes the turntable 251 to rise, the turntable 251 rotates under the guidance of the spiral guide groove 221, thereby winding up the clockwork spring 253 to tighten it.

[0037] Specifically, a sleeve 252 is coaxially mounted on the turntable 251, and two ends of a clockwork spring 253 are respectively connected to the outer circumference of the sleeve 252 and the inner circumference of the turntable 251. When the turntable 251 and the sleeve 252 rotate relative to each other, the clockwork spring 253 is tightened to shrink the clockwork spring 253. After the turntable 251 restricts movement and cancels the restriction on the sleeve 252, that is, when the turntable 251 does not continue to rotate and the push on the locking screw 26 is canceled, the sleeve 252 rotates in the opposite direction when the clockwork spring 253 is reset.

[0038] Furthermore, a connecting block 261 is provided on the top of the locking screw 26, and the connecting block 261 is polygonal and slidably connected to the sleeve 252, and is used to limit the rotation of the sleeve 252 when the turntable 251 rotates to achieve the winding of the clockwork spring 253, and the connecting block 261 will not rotate relative to the sleeve 252. A limit platform 262 is provided on the top of the connecting block 261, which is used to limit the connection block 261 from being separated from the turntable 251 after the locking screw 26 is threadedly connected to the vibration rod 23, so as to limit the descent of the vibration rod 23 and improve stability.

[0039] In addition, the limit platform 262 is connected to the connecting block 261 through a connecting rod, and the height of the connecting rod is greater than the thickness of the limit strip 258 and less than the distance between the elastic airbag 255 and the turntable 251. It is used to give the connecting block 261 the required feed size for cooperating with the vibrator 23 to descend when following the rotation of the shaft sleeve 252 after the turntable 251 is limited. The height of the connecting rod must be greater than 5 mm to ensure the high stability of the connection between the vibrator 23 and the locking screw 26.

[0040] A limiting sleeve 259 is arranged in the inner tube 22, and a limiting tooth 2591 is provided on the limiting sleeve 259. The limiting tooth 2591 is used as a fixed limiting component to limit the rising movable sleeve 254 and squeeze the elastic air bag 255 arranged inside, so as to realize subsequent functions.

[0041] And a movable sleeve 254 is rotatably installed on the top of the turntable 251 and slidably connected to the limit sleeve 259. The movable sleeve 254 moves upward under the squeezing action of the turntable 251, thereby sliding in the limit sleeve 259, and squeezing the elastic air bag 255 through the fixed components inside the limit sleeve 259. A limit strip 258 is provided at the bottom of the movable sleeve 254 for limiting the separation of the locking screw 26 from the turntable 251. An elastic air bag 255 is provided in the movable sleeve 254, and a rack 2541 connected to the elastic air bag 255 is slidably installed on the movable sleeve 254, which is used to push the limit strip 258 to limit the separation of the locking screw 26 when the elastic air bag 255 is pressurized and expanded.

[0042] Furthermore, a ball bearing is provided between the turntable 251 and the movable sleeve 254 to reduce the rotation friction. The limit bar 258 is slidably arranged on the movable sleeve 254. A limit tooth with a right triangle cross section is provided on the side of the limit bar 258 close to the limit platform 262. When the limit bar 258 is stuck on the limit platform 262, the limit platform 262 cannot continue to descend. A pressure bar 257 cooperating with the limit bar 258 is slidably installed on the movable sleeve 254, and the sliding direction of the pressure bar 257 is parallel to the connecting block 261 and toward the elastic airbag 261. 55. A spring is provided between the limit strip 258 and the movable sleeve 254, which is used to drive the limit strip 258 so that its sliding direction is always toward the side away from the limit platform 262. When the pressure strip 257 does not squeeze the limit strip 258, the limit strip 258 is in an initial state and away from the limit platform 262. Only when the elastic air bag 255 is compressed and expanded to push the pressure strip 257 downward to drive the limit strip 258, the limit strip 258 will be pressed against the limit platform 262 to achieve limiting, thereby preventing the locking screw 26 from being separated from the turntable 251.

[0043] On the other hand, when the elastic airbag 1 255 is pressurized and expanded, it pushes the rack 2541 and the limit tooth 2591 to cooperate to limit the rotation plate 251 from descending. The opening of the limit tooth 2591 is at an acute angle to the horizontal line, so that the rise of the rotation plate 251 not only pushes the rack 2541 to rise and exceed the limit tooth 2591, but also pushes the rack 2541 to slide on the movable sleeve 254 and move toward the limit sleeve 259 when the elastic airbag 1 255 is pressurized and expanded, and finally gets stuck on the limit tooth 2591 to limit the descent of the movable sleeve 254 and the rotation plate 251.

[0044] It also includes an elastic member 256, which is located between the bottom of the elastic airbag 255 and the movable sleeve 254, and is used to support the elastic airbag 255 that is not squeezed and drive the pressure strip 257 to separate from the limit strip 258, and assist the limit strip 258 to separate from the limit platform 262.

[0045] In addition, it also includes an elastic airbag 24, which is sleeved on the inner tube 22, and the inner tube 22 is provided with a connecting tube 241 connected to the elastic airbag 1 255. After the elastic airbag 1 255 is squeezed, the gas is introduced into the elastic airbag 24 to seal the gap between the outer tube 21 and the inner tube 22, thereby improving the sealing performance. When detecting the material height in the liquid and the height of the dust-like material in the container, it can effectively prevent the erosion of dust and water vapor to the equipment and protect the parts well. The outer tube 21 is provided with a pressure relief valve connected to the elastic airbag 24, which is used to discharge the gas in the elastic airbag 24 during maintenance to cancel the expansion state of the elastic airbag 1 255, thereby rotating and disassembling the vibrating rod 23.

[0046] It is worth mentioning that it also includes an auxiliary part 27. The vibrating rod 23 is provided with a thread groove that cooperates with the locking screw 26, and the external thread on the locking screw 26 is in the opposite direction of the external thread on the vibrating rod 23, which is used to limit the loosening of the vibrating rod 23. As the position of the turntable 251 is limited and cannot move under the cooperation of the rack 2541 and the limit tooth 2591, and the locking screw 26 is screwed into the thread groove on the vibrating rod 23 under the rotation of the sleeve 252, since the external thread on the locking screw 26 is in the opposite direction of the external thread on the vibrating rod 23, at this time, whether it is rotated clockwise or counterclockwise, the vibrating rod 23 will be restricted, thereby increasing the installation stability of the vibrating rod 23. The auxiliary part 27 is composed of a push rod and a spring movably installed in the thread groove on the vibrating rod 23 , and the spring is sleeved on the push rod and presses against the vibrating rod 23. As the turntable 251 rises, it will squeeze the elastic airbag 255, and the elastic airbag 255 will press against the limit platform 262 when it expands, thereby increasing the pressure between the locking screw 26 and the vibrating rod 23, resulting in an increase in the friction between the locking screw 26 and the vibrating rod 23. At this time, it takes a lot of force to screw the locking screw 26 into the vibrating rod 23. However, an auxiliary part 27 is provided to always push the push rod against the bottom of the locking screw 26 to offset the pressure on the locking screw 26 when the elastic airbag 255 expands, thereby reducing the friction between the locking screw 26 and the vibrating rod 23, so that the locking screw 26 can be automatically screwed into the threaded groove on the vibrating rod 23 under the resetting action of the clockwork spring 253.

[0047] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. An IO-Link vibrating rod level switch, comprising a housing (1), characterized in that: Also includes: A vibration probe (2), the vibration probe (2) comprising an outer tube (21), an inner tube (22), and a vibration rod (23) threadedly connected to the inner tube (22), the inner wall of the inner tube (22) being provided with a spiral guide groove (221); An adjustment component (25), the adjustment component (25) comprising a turntable (251) movably arranged in the inner tube (22) and used to slide in the spiral guide groove (221) when lifting and lowering, and a limit sleeve (259) arranged in the inner tube (22), a locking screw (26) threadedly connected to the vibration rod (23) being slidably mounted on the turntable (251), and a spring spring (253) being arranged between the locking screw (26) and the turntable (251) and used to tighten the spring spring (253) when the locking screw (26) pushes the turntable (251) to rise, and a limit locking tooth (2591) is arranged on the limit sleeve (259); and a movable sleeve (254) rotatably mounted on the top of the rotating disk (251) and slidably connected to the limiting sleeve (259), wherein a limiting strip (258) for limiting the separation of the locking screw (26) from the rotating disk (251) is provided at the bottom of the movable sleeve (254), wherein an elastic airbag (255) is provided inside the movable sleeve (254), and a rack (2541) connected to the elastic airbag (255) is slidably mounted on the movable sleeve (254) for pushing the limiting strip (258) to limit the locking screw when the elastic airbag (255) is expanded under pressure. (26) disengages and pushes the rack (2541) to cooperate with the limit latch (2591) to limit the rotation disk (251) from descending, the rotation disk (251) is coaxially mounted with a shaft sleeve (252), and the two ends of the spring (253) are respectively connected to the outer circumference of the shaft sleeve (252) and the inner circumference of the rotation disk (251), when the rotation disk (251) and the shaft sleeve (252) rotate relative to each other, the spring (253) is wound, and the top of the locking screw (26) is provided with a connecting block (261), and the connecting block (261) is in the shape of a polygonal column and is connected to the shaft The sleeve (252) is slidably connected to limit the rotation of the shaft sleeve (252) when the rotating disk (251) rotates to realize the winding of the spring spring (253); a limit platform (262) is provided on the top of the connecting block (261) to limit the connection block (261) from being separated from the rotating disk (251); a ball bearing is provided between the rotating disk (251) and the movable sleeve (254) to reduce the rotation friction; the limit bar (258) is slidably arranged on the movable sleeve (254), and a spring is provided between the limit bar (258) and the movable sleeve (254). , used to drive the limit bar (258) so that its sliding direction is always toward the side away from the limit platform (262), and a pressure strip (257) cooperating with the limit bar (258) is slidably installed on the movable sleeve (254), and the sliding direction of the pressure strip (257) is parallel to the connecting block (261) and toward the elastic air bag (255), and the elastic air bag (255) is used to compress the pressure strip (257) after it expands under pressure to drive the limit bar (258) to extend toward the limit platform (262), so as to limit the locking screw (26) from being separated from the turntable (251).

2. The IO-Link vibrating rod level switch according to claim 1, characterized in that: A communication module is provided in the housing (1), and the communication module communicates based on the IO-Link protocol.

3. The IO-Link vibrating rod level switch according to claim 1, characterized in that: The limiting platform (262) is connected to the connecting block (261) via a connecting rod, and the height of the connecting rod is greater than the thickness of the limiting strip (258) and less than the distance between the elastic airbag (255) and the turntable (251), so that after the turntable (251) is limited, the connecting block (261) cooperates with the vibrating rod (23) to descend when following the rotation of the shaft sleeve (252) .

4. The IO-Link vibrating rod level switch according to claim 1, characterized in that: It also includes an elastic member (256), which is located between the bottom of the elastic airbag 1 (255) and the movable sleeve (254) and is used to support the elastic airbag 1 (255) that is not squeezed and drive the pressure strip (257) to separate from the limiting strip (258).

5. The IO-Link vibrating rod level switch according to claim 1, characterized in that: It also includes a second elastic airbag (24), the second elastic airbag (24) being sleeved on the inner tube (22), and the inner tube (22) being provided with a connecting tube (241) communicating with the first elastic airbag (255), and the outer tube (21) being provided with a pressure relief valve communicating with the second elastic airbag (24).

6. The IO-Link vibrating rod level switch according to claim 1, characterized in that: The invention also includes an auxiliary part (27), wherein the vibrating rod (23) is provided with a thread groove cooperating with the locking screw (26), and the external thread on the locking screw (26) has a spiral direction opposite to that of the external thread on the vibrating rod (23), and the auxiliary part (27) is composed of a push rod and a spring movably mounted in the thread groove on the vibrating rod (23), and the spring is sleeved on the push rod and abuts against the vibrating rod (23), so as to always push the push rod against the bottom of the locking screw (26) to offset the pressure on the locking screw (26) when the elastic airbag (255) expands.

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