Tuning fork liquid level switch ceramic group

Abstract

The utility model discloses a tuning fork liquid level switch ceramic group, which belongs to the technical field of liquid level detection and comprises a main body, a signal transmission device, a mounting device and a locking device are mounted on the main body, and the mounting device is connected with the locking device. The signal transmission device comprises a transmission assembly and a fixing assembly, the transmission assembly is connected with the fixing assembly, and the transmission assembly and the fixing assembly are connected with the upper end of the main body. By means of the mode, the piezoelectric ceramics and the electrode plates in the transmission assembly are used in a matched mode, so that the strength of received signals is improved, and the effect is better when the transmission assembly is used in a high-density medium; the connecting base and the fixing base are in sealed rotating connection and are matched with the pressing block for locking, so that the angle of the tuning fork can be adjusted and locked after the fixing shell and the to-be-installed equipment are connected in a screwed mode, and the problem of measurement errors caused by incorrect tuning fork angle is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of liquid level detection, and particularly relates to a tuning fork liquid level switch ceramic group. Background Art

[0002] The tuning fork liquid level switch is a commonly used instrument in the industrial control process. The reliability of the switch is very important for the safety of industrial control. The switch is often used for high and low level alarms, feeding control, preventing overflow of storage tanks, etc., which are all very important.

[0003] For example, Chinese Patent Application CN217641119U discloses a tuning fork liquid level switch device, which includes a fork body and a junction box. A connector connected to the junction box is arranged on the fork body, and a sealing component is sleeved on the connector. The sealing component is used to increase the sealing performance of the installation between the device and the device to be measured. The sealing component includes a sealing nut threadedly connected to the connector, and a sealing ring is rotatably connected to the bottom surface of the sealing nut.

[0004] However, for this tuning fork liquid level switch device, when used for media with higher density, due to the smaller vibration of the tuning fork and the smaller received signal, it will cause instability in measurement or operation. At the same time, because the tuning fork rotates together with the sealing component, after being tightened and installed, the direction of the tuning fork may not be the correct angle, resulting in inaccurate measurement.

[0005] Based on this, the utility model designs a tuning fork liquid level switch ceramic group to solve the above problems. Summary of the Utility Model

[0006] In view of the above-mentioned shortcomings of the prior art, the utility model provides a tuning fork liquid level switch ceramic group.

[0007] To achieve the above purposes, the utility model is realized through the following technical solutions:

[0008] A tuning fork liquid level switch ceramic group includes a main body,

[0009] A signal transmission device, an installation device and a locking device are installed on the main body, and the installation device is connected to the locking device;

[0010] The signal transmission device includes a transmission component and a fixing component. The transmission component is connected to the fixing component, and the transmission component and the fixing component are connected to the upper end of the main body.

[0011] Furthermore, the main body includes a fixed seat, a tuning fork and a fastening ring. The upper end of the fixed seat is a cylinder, the lower end of the fixed seat is a disc. Threads are provided on the upper cylinder of the fixed seat. The lower disc of the fixed seat is fixedly connected to the tuning fork, and the upper disc of the fixed seat is fixedly connected to the fastening ring. The fixed seat is connected to the transmission component, the fixing component and the installation device, and the fastening ring is connected to the locking device.

[0012] Furthermore, the transmission component includes insulating columns, piezoelectric ceramics, and electrode plates. There are four piezoelectric ceramics and two electrode plates. The insulating columns are sleeved on the cylinders of the fixed seats. The upper and lower ends of the insulating columns are connected to the fixing components. The four piezoelectric ceramics are sleeved outside the insulating columns and are in contact connection with the insulating columns. The outer sides of the first and third piezoelectric ceramics from the top are clamped with the electrode plates, and the other two piezoelectric ceramics are in close fit connection with the electrode plates. The right end of the upper electrode plate is connected to a conductive sheet extending upward, and the left end of the lower electrode plate is connected to a conductive sheet extending upward. The upper electrode plate and the lowermost piezoelectric ceramic are connected to the fixing components.

[0013] Furthermore, the fixing component includes a metal pressing piece, a plastic sheath, a pressing metal pad, and a pressing screw. The metal pressing piece is circular. There is a groove on the inner side of the upper end of the metal pressing piece that cooperates with the lower end of the insulating column. There are protrusions on the outer side of the upper end of the metal pressing piece that cooperate with the plastic sheath. The metal pressing piece is in close fit connection with the fixed seat, the insulating column, and the piezoelectric ceramics. The pressing metal pad is circular. There is a groove on the inner side of the lower end of the pressing metal pad that cooperates with the upper end of the insulating column. There are protrusions on the outer side of the lower end of the pressing metal pad that cooperate with the plastic sheath. The pressing metal pad is in close fit connection with the fixed seat, the insulating column, the electrode plate, and the pressing screw. The pressing screw is located above the pressing metal pad. The pressing screw is threadedly connected to the upper end of the cylinder of the fixed seat. The plastic sheath is in close fit connection with the metal pressing piece and the pressing metal pad.

[0014] Furthermore, grooves for the conductive sheets of the electrode plates to pass through are provided on the left and right sides of the plastic sheath. There are protrusions on the front and rear ends of the plastic sheath that cooperate with the pressing metal pad, and grooves are provided on both sides of the protrusions.

[0015] Furthermore, the installation device includes a connecting seat and a fixed outer shell. The connecting seat is circular. The inner side of the connecting seat is in sealed rotational connection with the disc of the fixed seat. The outer side of the connecting seat is fixedly connected to the fixed outer shell. The connecting seat and the fixed outer shell are connected to the locking device. Threads for installation and tightening are provided on the outer side of the fixed outer shell.

[0016] Furthermore, there are two locking devices. The two locking devices are located on the left and right sides of the upper end of the connecting seat. The locking device includes a fixed frame, an adjusting rod, a sliding rod, and a pressing block. The fixed frame is an L-shaped frame. The fixed frame is fixedly connected to the connecting seat and the fixed outer shell. The fixed frame is in sliding connection with the fastening ring in a fitting manner. The lower end of the adjusting rod is provided with threads. The adjusting rod passes through the fixed frame and the pressing block and is rotationally connected to the connecting seat. The adjusting rod is rotationally connected to the fixed frame. The adjusting rod is threadedly connected to the pressing block. The upper and lower ends of the sliding rod are respectively fixedly connected to the fixed frame and the connecting seat. The pressing block is in sliding connection with the sliding rod.

[0017] Furthermore, a plurality of friction-increasing gaskets are fixedly arranged on the inner side of the upper end of the pressing block.

[0018] The beneficial effects of the present utility model compared with the prior art are as follows:

[0019] By the cooperative use of a plurality of piezoelectric ceramics and electrode plates in the transmission assembly of the present utility model, the intensity of the received signal is increased, and the effect is better when used in a high-density medium;

[0020] By the sealed rotational connection between the connecting seat and the fixed seat and the locking with the pressing block, after the fixed outer shell is screwed tightly with the device to be installed, the angle of the tuning fork can be adjusted and locked, avoiding the measurement error problem caused by the incorrect angle of the tuning fork. Description of the Drawings

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present utility model, and for those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0022] Figure 1 Is a perspective view of a ceramic group of a tuning fork liquid level switch of the present utility model;

[0023] Figure 2 Is a front view of a ceramic group of a tuning fork liquid level switch of the present utility model;

[0024] Figure 3 Is a top view of a ceramic group of a tuning fork liquid level switch of the present utility model;

[0025] Figure 4 Is a perspective view of a hidden installation device of the present utility model;

[0026] Figure 5 Is a sectional view along the A-A direction of Figure 3 ;

[0027] Figure 6 Is Figure 5 An enlarged view of part B in;

[0028] The reference numerals in the drawings respectively represent:

[0029] 1. Main body 11. Fixed seat 12. Tuning fork 13. Fastening ring 2. Signal transmission device 21. Transmission assembly 211. Insulating column 212. Piezoelectric ceramic 213. Electrode plate 22. Fixing component 221. Metal pressing piece 222. Plastic sheath 223. Pressing metal pad 224. Pressing screw 3. Installation device 31. Connecting seat 32. Fixed outer shell 4. Locking device 41. Fixed frame 42. Adjusting rod 43. Slide bar 44. Pressing block. Detailed implementation mode

[0030] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts shall fall within the protection scope of the present utility model.

[0031] The "left", "right", "front", "rear", "upper" and "lower" mentioned in the following description are oriented in the perspective direction of the front view. Embodiment

[0032] In some embodiments, please refer to the attached drawings of the specification Figures 1-6 , a tuning fork level switch ceramic group, including a main body 1,

[0033] A signal transmission device 2, a mounting device 3 and a locking device 4 are installed on the main body 1, and the mounting device 3 is connected to the locking device 4;

[0034] The signal transmission device 2 includes a transmission component 21 and a fixing component 22. The transmission component 21 is connected to the fixing component 22, and the transmission component 21 and the fixing component 22 are connected to the upper end of the main body 1.

[0035] The main body 1 includes a fixing base 11, a tuning fork 12 and a fastening ring 13. The upper end of the fixing base 11 is a cylinder, the lower end of the fixing base 11 is a disc, a thread is provided on the upper cylinder of the fixing base 11, the lower disc of the fixing base 11 is fixedly connected to the tuning fork 12, the upper disc of the fixing base 11 is fixedly connected to the fastening ring 13, the fixing base 11 is connected to the transmission component 21, the fixing component 22 and the mounting device 3, and the fastening ring 13 is connected to the locking device 4.

[0036] The transmission component 21 includes an insulating column 211, piezoelectric ceramics 212 and electrode plates 213. There are four piezoelectric ceramics 212 and two electrode plates 213. The insulating column 211 is sleeved on the cylinder of the fixing base 11. The upper and lower ends of the insulating column 211 are connected to the fixing component 22. The four piezoelectric ceramics 212 are sleeved outside the insulating column 211 and are in contact connection with the insulating column 211. The outer sides of the first piezoelectric ceramic 212 and the third piezoelectric ceramic 212 above are clamped to the electrode plates 213, and the other two piezoelectric ceramics 212 are in close fit connection with the electrode plates 213. A conductive sheet extending upward is connected to the right end of the upper electrode plate 213, and a conductive sheet extending upward is connected to the left end of the lower electrode plate 213. The upper electrode plate 213 and the lowermost piezoelectric ceramic 212 are connected to the fixing component 22.

[0037] The fixing component 22 includes a metal pressing piece 221, a plastic sheath 222, a pressing metal pad 223 and a pressing screw 224. The metal pressing piece 221 is in a circular ring shape. An inner side of the upper end of the metal pressing piece 221 is provided with a groove for mating with the lower end of the insulating column 211. An outer side of the upper end of the metal pressing piece 221 is provided with a convex block for mating with the plastic sheath 222. The metal pressing piece 221 is closely and adhesively connected to the fixed seat 11, the insulating column 211 and the piezoelectric ceramic 212. The pressing metal pad 223 is in a circular ring shape. An inner side of the lower end of the pressing metal pad 223 is provided with a groove for mating with the upper end of the insulating column 211. An outer side of the lower end of the pressing metal pad 223 is provided with a convex block for mating with the plastic sheath 222. The pressing metal pad 223 is closely and adhesively connected to the fixed seat 11, the insulating column 211, the electrode plate 213 and the pressing screw 224. The pressing screw 224 is located above the pressing metal pad 223. The pressing screw 224 is in threaded connection with the upper end of the cylinder of the fixed seat 11. The plastic sheath 222 is closely and adhesively connected in cooperation with the metal pressing piece 221 and the pressing metal pad 223.

[0038] The left and right sides of the plastic sheath 222 are provided with grooves for the conductive sheets of the electrode plate 213 to pass through. The front and rear ends of the plastic sheath 222 are provided with convex blocks for mating with the pressing metal pad 223. Grooves are provided on both sides of the convex blocks.

[0039] The mounting device 3 includes a connecting seat 31 and a fixed outer shell 32. The connecting seat 31 is in a circular ring shape. The inner side of the connecting seat 31 is in sealed rotational connection with the disk of the fixed seat 11. The outer side of the connecting seat 31 is fixedly connected to the fixed outer shell 32. The connecting seat 31 and the fixed outer shell 32 are connected to the locking device 4. The outer side of the fixed outer shell 32 is provided with threads for installation and tightening.

[0040] There are two locking devices 4. The two locking devices 4 are located on the left and right sides of the upper end of the connecting seat 31. The locking device 4 includes a fixed frame 41, an adjusting rod 42, a sliding rod 43 and a pressing block 44. The fixed frame 41 is an L-shaped frame. The fixed frame 41 is fixedly connected to the connecting seat 31 and the fixed outer shell 32. The fixed frame 41 is in sliding connection in a fitting manner with the fastening ring 13. The lower end of the adjusting rod 42 is provided with threads. The adjusting rod 42 passes through the fixed frame 41 and the pressing block 44 and is in rotational connection with the connecting seat 31. The adjusting rod 42 is in rotational connection with the fixed frame 41. The adjusting rod 42 is in threaded connection with the pressing block 44. The upper and lower ends of the sliding rod 43 are respectively fixedly connected to the fixed frame 41 and the connecting seat 31. The pressing block 44 is in sliding connection with the sliding rod 43.

[0041] A plurality of friction-increasing gaskets are fixedly arranged on the inner side of the upper end of the pressing block 44.

[0042] When the ceramic group of the tuning fork liquid level switch is in normal use, first, the plastic sheath 222 is sleeved on the fixing base 11. Then, the two piezoelectric ceramics 212 are clamped in the electrode plates 213. Next, the metal pressing member 221, the insulating column 211, the piezoelectric ceramics 212, the electrode plates 213 with the piezoelectric ceramics 212 clamped thereon, and the pressing metal pad 223 are sleeved on the fixing base 11 in the specified order. Through the cooperation and pressing between the upper end of the plastic sheath 222 and the pressing metal pad 223, the pressing screw 224 is threadedly connected to the upper-end cylinder of the fixing base 11, and the pressing screw 224 is tightened to make it closely fit with the pressing metal pad 223. The fixing shell 32 is fixedly connected to the equipment to be installed by screwing tightly. The plastic sheath 222 is rotated, and the plastic sheath 222 drives the metal pressing member 221 and the pressing metal pad 223 to rotate. The metal pressing member 221 and the pressing metal pad 223 drive the fixing base 11 to rotate, and the fixing base 11 drives the tuning fork 12 to rotate. When the tuning fork 12 rotates to the specified direction, the adjusting rod 42 is rotated. The adjusting rod 42 drives the pressing block 44 to move upward along the sliding rod 43 through the thread, so that the pressing block 44 closely fits with the fastening ring 13, thereby locking and fixing the fixing base 11. By adjusting the angle of the tuning fork 12 and then locking it after installation, it is avoided that the angle of the tuning fork 12 is in an incorrect position after installation and tightening, resulting in incorrect collected data, or the situation where the angle of the tuning fork 12 is correct but it is not fully installed and tightened. By clamping and alternately stacking the two piezoelectric ceramics 212 with the electrode plates 213, the received signal strength is stronger, avoiding the problem that the signal is not strong enough in liquids with higher density.

[0043] 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 foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements will not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A tuning fork liquid level switch ceramic assembly, comprising a main body (1), characterized in that: The main body (1) is equipped with a signal transmission device (2), a mounting device (3) and a locking device (4), and the mounting device (3) and the locking device (4) are connected; The signal transmission device (2) comprises a transmission component (21) and a fixing component (22), the transmission component (21) is connected to the fixing component (22), and the transmission component (21) and the fixing component (22) are connected to the upper end of the main body (1); The main body (1) comprises a fixing seat (11), a tuning fork (12) and a fastening ring (13); the upper end of the fixing seat (11) is a cylinder, the lower end of the fixing seat (11) is a disc, the upper end of the cylinder of the fixing seat (11) is provided with a thread, the lower end of the disc of the fixing seat (11) is fixedly connected to the tuning fork (12), the upper end of the disc of the fixing seat (11) is fixedly connected to the fastening ring (13), the fixing seat (11) is connected to the transmission component (21), the fixing component (22) and the installation device (3), and the fastening ring (13) is connected to the locking device (4); The transmission component (21) comprises an insulating column (211), a piezoelectric ceramic (212) and an electrode sheet (213), wherein four piezoelectric ceramics (212) are provided and two electrode sheets (213) are provided; the insulating column (211) is sleeved on the cylinder of the fixing seat (11); the upper and lower ends of the insulating column (211) are connected to the fixing component (22); the four piezoelectric ceramics (212) are sleeved on the outside of the insulating column (211) and are in contact with and connected to the insulating column (211); the outsides of the first piezoelectric ceramic (212) and the third piezoelectric ceramic (212) at the top are clamped to the electrode sheet (213); the other two piezoelectric ceramics (212) are tightly fitted and connected to the electrode sheet (213); the right end of the upper electrode sheet (213) is connected to a conductive sheet extending upward; the left end of the lower electrode sheet (213) is connected to a conductive sheet extending upward; the upper electrode sheet (213) and the lowermost piezoelectric ceramic (212) are connected to the fixing component (22); The mounting device (3) comprises a connecting seat (31) and a fixed housing (32); the connecting seat (31) is a circular ring; the inner side of the connecting seat (31) is rotatably connected to a circular disc of the fixed seat (11); the outer side of the connecting seat (31) is fixedly connected to the fixed housing (32); the connecting seat (31) and the fixed housing (32) are connected to a locking device (4); and the outer side of the fixed housing (32) is provided with a thread for mounting and tightening.

2. The tuning fork liquid level switch ceramic assembly according to claim 1, characterized in that: The fixing assembly (22) comprises a metal pressing piece (221), a plastic sheath (222), a pressing metal pad (223) and a pressing screw (224); the metal pressing piece (221) is annular; a groove is provided on the inner side of the upper end of the metal pressing piece (221) to match the lower end of the insulating column (211); a convex block is provided on the outer side of the upper end of the metal pressing piece (221) to match the plastic sheath (222); the metal pressing piece (221) is tightly fitted and connected to the fixing seat (11), the insulating column (211) and the piezoelectric ceramic (212); the pressing metal pad (223) is annular; the pressing metal pad (224) is 3) is provided with a groove on the inner side of the lower end thereof to match the upper end of the insulating column (211); a protrusion matching the plastic sheath (222) is provided on the outer side of the lower end of the clamping metal pad (223); the clamping metal pad (223) is tightly fitted and connected with the fixing seat (11), the insulating column (211), the electrode sheet (213) and the clamping screw (224); the clamping screw (224) is located above the clamping metal pad (223); the clamping screw (224) is threadedly connected with the cylindrical upper end of the fixing seat (11); the plastic sheath (222) is tightly fitted and connected with the metal clamping piece (221) and the clamping metal pad (223).

3. The tuning fork liquid level switch ceramic assembly according to claim 2, characterized in that: The left and right sides of the plastic sheath (222) are provided with grooves for the conductive sheet of the electrode sheet (213) to pass through, and the front and rear ends of the plastic sheath (222) are provided with bumps that cooperate with the pressing metal pad (223), and the two sides of the bumps are provided with grooves.

4. The tuning fork liquid level switch ceramic assembly according to claim 3, characterized in that: The locking devices (4) are provided with two, and the two locking devices (4) are located on the left and right sides of the upper end of the connecting seat (31). The locking devices (4) include a fixing frame (41), an adjusting rod (42), a sliding rod (43) and a pressing block (44). The fixing frame (41) is an L-shaped frame. The fixing frame (41) is fixedly connected to the connecting seat (31) and the fixed housing (32). The fixing frame (41) is slidably connected to the fastening ring (13). The lower end of the adjusting rod (42) is provided with a thread. The adjusting rod (42) passes through the fixing frame (41) and the pressing block (44) and is rotatably connected to the connecting seat (31). The adjusting rod (42) is rotatably connected to the fixing frame (41). The adjusting rod (42) is threadedly connected to the pressing block (44). The upper and lower ends of the sliding rod (43) are fixedly connected to the fixing frame (41) and the connecting seat (31) respectively. The pressing block (44) is slidably connected to the sliding rod (43).

5. The tuning fork liquid level switch ceramic assembly according to claim 4, characterized in that: A plurality of friction-increasing gaskets are fixedly arranged on the inner side of the upper end of the pressing block (44).

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