An IO-Link tuning fork switch

Abstract

The present invention relates to the technical field of tuning fork switches, specifically an IO-Link tuning fork switch, comprising a housing, an end cap is detachably connected to the housing, a connector is fixedly connected to the lower end of the housing, a No. 1 threaded joint is fixedly connected to the lower end of the connector, the No. 1 threaded joint is a hollow structure, the No. 1 threaded joint abuts against a lower shell, a plurality of tuning fork structures are fixedly connected to the lower shell, the plurality of tuning fork structures are similar in shape and have different lengths, and the plurality of tuning fork structures are arranged in a circular array in sequence according to their lengths. The IO-Link tuning fork switch provided by the present invention has a structure that is easy to maintain, and there is no need to remove the entire tuning fork switch from the pipeline, and it can be applied to different types of pipelines, and can also monitor the pressure in the pipeline that transports alkaline corrosive liquid, and perform a pressure relief and closing operation.

Description

Technical Field

[0001] The present invention relates to the technical field of tuning fork switches, in particular to an IO-Link tuning fork switch. Background Art

[0002] The working principle of the tuning fork switch is to make the tuning fork body vibrate at a certain resonant frequency through the piezoelectric crystal module installed on the tuning fork base. When the tuning fork body of the tuning fork switch contacts the measured medium, the frequency and amplitude of the tuning fork body will change. These changes of the tuning fork switch are detected, processed and converted into a switch signal by the intelligent circuit.

[0003] Because the tuning fork switch is applicable to almost all liquid media, and the tuning fork switch is not affected by foam, eddy current, and gas. Therefore, the tuning fork switch has a wide range of applications. The tuning fork switch in the prior art is generally connected to the pipeline by thread or flange. If it needs to be repaired or adjusted, it is necessary to rotate the thread or flange to remove the tuning fork switch as a whole. During the multiple disassembly and assembly processes, the threaded holes on the pipeline will be slipped, resulting in loose subsequent installation connections. At the same time, some pipelines have high air tightness requirements. If structural damage occurs at the connection of the tuning fork switch, the entire pipeline will be scrapped. At the same time, the tuning fork switches in the prior art are all single fork bodies, which are not applicable to enterprises with high requirements for detecting changes in the liquid level in the pipeline, and the fork body length is fixed, which cannot be applied to a variety of working conditions.

[0004] In view of this, the present invention proposes an IO-Link tuning fork switch to solve the above technical problems. Summary of the invention

[0005] The purpose of this section is to summarize some aspects of embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the specification abstract and the invention title of this application to avoid blurring the purpose of this section, the specification abstract and the invention title, and such simplifications or omissions cannot be used to limit the scope of the present invention.

[0006] The present invention provides an IO-Link tuning fork switch, which can be easily repaired without removing the entire tuning fork switch from the pipeline, and can be applied to different types of pipelines. It can also monitor the pressure in the pipeline for transporting alkaline corrosive liquid and perform pressure relief and closing operations. The specific scheme is as follows:

[0007] An IO-Link tuning fork switch comprises a shell, an end cover is detachably connected to the shell, a connector is fixedly connected to the lower end of the shell, a No. 1 threaded joint is fixedly connected to the lower end of the connector, the No. 1 threaded joint is hollow inside, a lower shell is abutted inside the No. 1 threaded joint, a plurality of tuning fork structures are fixedly connected inside the lower shell, the plurality of tuning fork structures are similar in shape and have different lengths, and the plurality of tuning fork structures are arranged in a circular array in sequence according to their lengths.

[0008] As a preferred solution of the IO-Link tuning fork switch described in the present invention, the tuning fork structure includes a transition column, which is fixedly connected to the lower shell body through shock-absorbing rubber, and one end of the transition column away from the lower shell body is fixedly connected to a connecting rod, and the lower end of the connecting rod is fixedly connected to a vibration fork body.

[0009] As a preferred solution of the IO-Link tuning fork switch of the present invention, a sealing ring is fixedly connected to the lower end of the lower shell body, and the lower shell body is abutted against the internal hollow structure of the No. 1 threaded joint through the sealing ring, and the sealing ring plays a sealing role. A piezoelectric crystal module is fixedly connected to the top of the transition column, and the piezoelectric crystal module, the tuning fork structure and the IO-Link module are mutually associated, and the tuning fork structure, the piezoelectric crystal module and the IO-Link module form a tuning fork unit.

[0010] As a preferred solution of the IO-Link tuning fork switch of the present invention, a No. 2 threaded joint is provided on the lower shell, the No. 2 threaded joint is threadedly connected to the upper shell, and the lower shell is connected to the upper shell through the No. 2 threaded joint to form a separation unit.

[0011] As a preferred solution of the IO-Link tuning fork switch of the present invention, a disassembly unit is provided on the upper shell body, and the disassembly unit includes a card block, and the card block is slidably embedded in the side wall of the upper shell body, and the card block is slidably connected to the upper shell body through a supporting spring, and a sliding hole is opened in the middle of the card block, and the sliding hole is slidably connected to a stabilizing rod, and the stabilizing rod is fixedly connected to the upper shell body, and a handle is fixedly connected to the top of the upper shell body, and the card block is slidably abutted against the inner wall of the outer shell.

[0012] As a preferred solution of the IO-Link tuning fork switch described in the present invention, the card block abuts against the extrusion block, the card block is engaged with a recessed portion of the inner wall of the shell, the end of the extrusion block away from the card block is fixedly connected to a T-shaped rod, the other end of the T-shaped rod extends to the outside of the shell, an extrusion spring is nested on the T-shaped rod, the two ends of the extrusion spring abut against the shell and the T-shaped rod respectively, the end of the extrusion block away from the card block is also fixedly connected to a pair of calibration rods, the calibration rods are distributed on the upper and lower sides of the T-shaped rod, the calibration rods cooperate with the calibration hole, and the calibration hole is opened on the side wall of the shell.

[0013] As a preferred solution of the IO-Link tuning fork switch described in the present invention, a pressure warning unit is provided at the lower end of the No. 1 threaded joint, and the pressure warning unit includes a through hole, which is opened at the lower end of the No. 1 threaded joint, and a piston is slidably connected in the through hole, and a sliding rod is fixedly connected to the upper end of the piston, and a contraction spring is nested on the sliding rod, and the lower end of the contraction spring abuts against the piston, and the upper end of the contraction spring abuts against the lower end surface of the lower shell body, and the upper end of the sliding rod extends into the interior of the lower shell body and is fixedly connected to the push rod, and a waterproof ring is provided at the contact position between the sliding rod and the lower shell body.

[0014] As a preferred solution of the IO-Link tuning fork switch of the present invention, the push rod abuts against the metal film, the metal film is fixedly connected to the lower end of the upper shell, the metal film and the lower shell form a sealed cavity, and a pressure sensor is arranged in the cavity.

[0015] As a preferred solution of the IO-Link tuning fork switch of the present invention, a transmission unit is arranged on the upper shell, and the transmission unit includes a detachable joint, and the IO-Link module is connected to the transmission line through the detachable joint, and the tuning fork structure, the piezoelectric crystal module, the IO-Link module, the pressure sensor and the transmission unit are interrelated.

[0016] As a preferred solution of the IO-Link tuning fork switch of the present invention, the metal film is an arc-shaped metal film with deformation recovery capability.

[0017] Beneficial effects of the present invention:

[0018] (1) In the present invention, a plurality of tuning fork structures of different lengths are installed on the lower shell, so that appropriate specifications can be made in response to different liquid levels in the pipeline. The traditional tuning fork switch has only one set of tuning fork structures of fixed length, and cannot make different switching instructions according to various liquid levels in the pipeline.

[0019] (2) In the present invention, by setting a piston and a sliding rod, when the pipeline pressure increases, the sliding rod drives the push rod to squeeze the metal film, and the metal film is deformed, so that the pressure in the sealed cavity formed by the metal film and the lower shell increases. After receiving the pressure information, the pressure sensor will transmit the information to the external actuator to close or release the pressure on the pipeline valve. The piston is made of rubber and can directly contact the alkaline liquid to play the role of transmitting pressure, so that the pressure sensor is not installed in the pipeline to prevent corrosion.

[0020] (3) In the present invention, the entire tuning fork unit can be pulled out of the housing by opening the end cover, pressing the two T-shaped rods on the left and right at the same time, and then pulling the handle upwards, so that the tuning fork unit can be easily inspected and repaired without disassembling the No. 1 threaded joint, thereby preventing the No. 1 threaded joint from slipping due to frequent disassembly. At the same time, the upper housing and the lower housing are disassembled and connected through the No. 2 threaded joint. In daily use, the tuning fork structure can be disassembled for inspection and replacement, thereby reducing the cost of use. In addition, tuning fork structures of different lengths can be selected and installed according to the diameter of the pipeline, so that the tuning fork switch meets various working conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them:

[0022] Figure 1 This is a schematic diagram of the overall structure of an IO-Link tuning fork switch;

[0023] Figure 2 A schematic diagram of the structure of an IO-Link tuning fork switch from the second perspective;

[0024] Figure 3 It is a schematic diagram of the first cross-sectional structure of an IO-Link tuning fork switch;

[0025] Figure 4 A schematic diagram of the connection structure of an IO-Link module, a transmission route and a disconnect connector of an IO-Link tuning fork switch;

[0026] Figure 5 It is a schematic diagram of the second cross-sectional structure of an IO-Link tuning fork switch;

[0027] Figure 6 A schematic diagram of the connection structure of a tuning fork unit of an IO-Link tuning fork switch;

[0028] Figure 7A schematic diagram of the connection structure of a tuning fork unit and a separation unit of an IO-Link tuning fork switch;

[0029] Figure 8 for Figure 1 A schematic diagram of the structure enlargement in the middle;

[0030] Fig. 9 for Figure 3 A magnified schematic diagram of the structure at B in the middle;

[0031] Fig.10 for Figure 3 A magnified schematic diagram of the structure at C in the middle;

[0032] In the figure:

[0033] 1. End cover; 2. Housing; 3. Connector; 4. No. 1 threaded connector;

[0034] 5. Tuning fork unit; 51. Tuning fork structure; 511. Connecting rod; 512. Vibrating fork body; 513. Transition column; 54. Shock-absorbing rubber; 55. Piezoelectric crystal module; 56. IO-Link module; 57. Lower housing; 58. Sealing ring;

[0035] 6. Separation unit; 61. Upper shell; 62. No. 2 threaded joint;

[0036] 7. Disassembly unit; 71. T-shaped rod; 72. Extrusion spring; 73. Calibration rod; 74. Calibration hole; 75. Extrusion block; 76. Clamp block; 77. Support spring; 78. Stabilizing rod; 79. Sliding hole; 710. Handle;

[0037] 8. Pressure warning unit; 81. Through hole; 82. Piston; 83. Sliding rod; 84. Contraction spring; 85. Waterproof ring; 86. Push rod; 87. Metal film; 88. Pressure sensor;

[0038] 9. Transmission unit; 91. Disassembly connector; 92. Transmission line. DETAILED DESCRIPTION

[0039] In order to make the purpose, features and advantages of the present invention more obvious and easy to understand, the technical solutions 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 embodiments described below are only 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.

[0040] Example

[0041] like Figure 1 and Figure 2As shown, an IO-Link tuning fork switch comprises a housing 2, an end cover 1 is detachably connected to the housing 2, a connector 3 is fixedly connected to the lower end of the housing 2, a No. 1 threaded joint 4 is fixedly connected to the lower end of the connector 3, and the tuning fork switch can be installed using a flange joint or a No. 1 threaded joint 4 according to the working conditions. Both installation methods are prior arts. The tuning fork switch is suitable for liquid pipelines, and when installed, the liquid pipeline is horizontally arranged and the tuning fork switch is installed perpendicular to the liquid pipeline.

[0042] like Figure 1 , Figure 2 and Figure 3 As shown, the interior of the No. 1 threaded joint 4 is a hollow structure, and the interior of the No. 1 threaded joint 4 is abutted against a lower shell 57, and a plurality of tuning fork structures 51 are fixedly connected inside the lower shell 57. The plurality of tuning fork structures 51 are similar in shape and have different lengths. The plurality of tuning fork structures 51 are arranged in a circular array in sequence according to their lengths. The plurality of tuning fork structures 51 have different lengths, which mainly respond to different liquid levels in the pipeline. The traditional tuning fork switch has only one set of tuning fork structures 51 with a fixed length, and cannot make different switching instructions according to various liquid levels in the pipeline.

[0043] like Figure 3 , Figure 4 , Figure 5 , Figure 7 and Fig.10As shown, the tuning fork structure 51 includes a transition column 513, and the transition column 513 is fixedly connected to the lower shell 57 through a shock-absorbing rubber 54. The end of the transition column 513 away from the lower shell 57 is fixedly connected to a connecting rod 511, and the lower end of the connecting rod 511 is fixedly connected to a vibration fork body 512. The lower end of the lower shell 57 is fixedly connected to a sealing ring 58, and the lower shell 57 is abutted against the internal hollow structure of the No. 1 threaded joint 4 through the sealing ring 58, and the sealing ring 58 plays a sealing role. The top of the transition column 513 is fixedly connected to a piezoelectric crystal module 55, and the piezoelectric crystal module 55 and the tuning fork structure 51 and the IO-Link module 56 are mutually associated. The tuning fork structure 51, the piezoelectric crystal module 55 and the IO-Link module 56 form a tuning fork unit 5, and the vibration fork body 512 is excited by the piezoelectric crystal module 55 to generate vibration. When the vibration fork body 512 is immersed in liquid or solid, the vibration frequency changes. This frequency change is detected by the electronic circuit and a switch quantity is output (this is the existing technology and will not be elaborated in detail). When liquid flows in the pipeline, the liquid will immerse the vibrating fork 512. At this time, the information is transmitted to the IO-Link module 56, and the IO-Link module 56 (IO-Link uses digital communication to allow highly intelligent data exchange between devices. It reduces the possibility of errors and interference. At the same time, IO-Link allows two-way communication, which can not only read data from sensors and actuators, but also send instructions and configuration parameters to them. IO-Link can also be used to remotely configure and monitor the status of sensors and actuators. This facilitates the parameterization and fault diagnosis of the equipment and reduces maintenance time and cost. IO-Link provides a unified interface for various sensors and actuators, making them interchangeable between different manufacturers. This standardization reduces the complexity of equipment integration.), and the data is sorted by the IO-Link module 56 and transmitted through the transmission line 92. Among them, the tuning fork structure 51 is fixed in the lower shell 57 by the shock-absorbing rubber 54. The shock-absorbing rubber 54 can prevent the vibration of the tuning fork structure 51 from affecting other nearby tuning fork structures 51. After the lower shell 57 passes through the lower end of the No. 1 threaded joint 4, the sealing ring 58 abuts against the bottom of the No. 1 threaded joint 4 to prevent liquid from penetrating into the lower shell 57. The real-time liquid level is measured according to the frequency changes generated by the tuning fork structures 51 of different lengths, and the information is transmitted through the IO-Link module 56, thereby controlling the end actuator.

[0044] like Figure 3 , Figure 6 and Figure 7As shown, a No. 2 threaded joint 62 is provided on the lower shell 57, and the No. 2 threaded joint 62 is threadedly connected to the upper shell 61. The lower shell 57 is connected to the upper shell 61 through the No. 2 threaded joint 62 to form a separation unit 6. The upper shell 61 and the lower shell 57 are disassembled and connected through the No. 2 threaded joint 62. In daily use, the tuning fork structure 51 can be disassembled for inspection and replacement, thereby reducing the cost of use. In addition, tuning fork structures 51 of different lengths can be selected and installed according to the diameter of the pipeline, so that the tuning fork switch meets various working conditions.

[0045] like Figure 3 , Figure 5 , Figure 8 and Fig. 9 As shown, the upper shell 61 is provided with a disassembly unit 7, and the disassembly unit 7 includes a block 76, and the block 76 is slidably embedded in the side wall of the upper shell 61, and the block 76 is slidably connected to the upper shell 61 through a support spring 77, and a sliding hole 79 is opened in the middle of the block 76, and the sliding hole 79 is slidably connected to a stabilizing rod 78, and the stabilizing rod 78 is fixedly connected to the upper shell 61, and a handle 710 is fixedly connected to the top of the upper shell 61, and the block 76 is slidably abutted against the inner wall of the shell 2, and the block 76 is abutted against the extrusion block 75, and the block 76 is fixedly connected to the upper shell 61. It is engaged with a recess on the inner wall of the shell 2, and the end of the extrusion block 75 away from the block 76 is fixedly connected to a T-shaped rod 71, and the other end of the T-shaped rod 71 extends to the outside of the shell 2. An extrusion spring 72 is nested on the T-shaped rod 71, and the two ends of the extrusion spring 72 are respectively abutted against the shell 2 and the T-shaped rod 71. The end of the extrusion block 75 away from the block 76 is also fixedly connected to a pair of calibration rods 73, which are distributed on the upper and lower sides of the T-shaped rod 71, and the calibration rod 73 cooperates with the calibration hole 74, and the calibration hole 74 is opened on the side wall of the shell 2. When disassembly is required, first open the end cover 1, and then press the two T-shaped rods 71 ​​on the left and right at the same time. The T-shaped rod 71 drives the extrusion block 75 to squeeze the clamping block 76. The clamping block 76 will retract into the upper shell 61 under the extrusion. At this time, pull the handle 710 upward to pull the entire tuning fork unit 5 out of the shell 2. The user can inspect the tuning fork unit 5 without disassembling the No. 1 threaded joint 4, because the No. 1 threaded joint 4 will often slip when disassembled. After the inspection is completed, the handle 710 should be held to push the entire tuning fork unit 5 toward the bottom of the No. 1 threaded joint 4. At this time, the clamping block 76 is acted upon by the support spring 77 and slides against the inside of the No. 1 threaded joint 4. When sliding to the recessed part of the inner wall of the shell 2, the clamping block 76 and the shell 2 are engaged, and the lower shell 57 drives the sealing ring 58 to abut against the bottom of the No. 1 threaded joint 4 to complete the installation.

[0046] like Figure 3 , Figure 5 , Figure 7and Fig.10 As shown, a through hole 81 is opened at the lower end of the No. 1 threaded joint 4, and a piston 82 is slidably connected in the through hole 81. A slide rod 83 is fixedly connected to the upper end of the piston 82, and a contraction spring 84 is nested on the slide rod 83. The lower end of the contraction spring 84 abuts against the piston 82, and the upper end of the contraction spring 84 abuts against the lower end surface of the lower shell 57. The upper end of the slide rod 83 extends into the interior of the lower shell 57 and is fixedly connected to a push rod 86. A waterproof ring 85 is provided at the contact position between the slide rod 83 and the lower shell 57, and the push rod 86 abuts against a metal film 87. The metal film 87 is fixedly connected to the lower end of the upper shell 61. The metal film 87 and the lower shell 57 form a sealed cavity, and a pressure sensor 88 is provided in the cavity. When the liquid level in the pipeline is high and the liquid fills the pipeline, causing the pipeline pressure to increase, the piston 82 slides upward in the through hole 81 under the action of the liquid pressure, and drives the slide rod 83 upward. The slide rod 83 drives the push rod 86 to squeeze the metal film 87, and the metal film 87 is deformed, so that the pressure in the sealed cavity formed by the metal film 87 and the lower shell 57 increases. After receiving the pressure information, the pressure sensor 88 transmits the information to the IO-Link module 56, and the IO-Link module 56 organizes the data and transmits it to the end actuator.

[0047] The workflow is as follows:

[0048] First, install the IO-Link tuning fork switch on the pipeline according to the traditional installation method of the tuning fork switch. It is particularly important to note that the IO-Link tuning fork switch needs to be installed vertically in a horizontally placed pipeline. When liquid flows in the pipeline, the liquid will immerse the vibrating fork body 512, and the vibration frequency of the vibrating fork body 512, which is excited by the piezoelectric crystal module 55 to generate vibration, changes when it is immersed in liquid or solid. This frequency change is detected by the electronic circuit and transmitted to the IO-Link module 56, and then transmitted to the end effector after being sorted by the IO-Link module 56. Among them, the multiple tuning fork structures 51 installed on the lower shell 57 are arranged in a circular array in sequence according to the length. The lengths of the multiple tuning fork structures 51 are different, mainly corresponding to the different liquid levels in the pipeline. The traditional tuning fork switch only has one set of tuning fork structures 51 with fixed lengths, and cannot make different switching instructions according to the various liquid levels in the pipeline. When the liquid level in the pipeline is high and the liquid fills the pipeline, causing the pipeline pressure to increase, the piston 82 slides upward in the through hole 81 under the action of the liquid pressure, and drives the slide rod 83 upward. The slide rod 83 drives the push rod 86 to squeeze the metal film 87, and the metal film 87 is deformed, so that the pressure in the sealed cavity formed by the metal film 87 and the lower shell 57 increases. After receiving the pressure information, the pressure sensor 88 transmits the information to the IO-Link module 56, and the IO-Link module 56 organizes the data and transmits it to the end actuator. When maintenance is needed, first open the end cover 1, and then press the left and right T-shaped rods 71 ​​at the same time. The T-shaped rod 71 drives the extrusion block 75 to squeeze the clamping block 76. The clamping block 76 will retract into the upper shell 61 under the pressure. At this time, pull the handle 710 upward to pull the entire tuning fork unit 5 out of the shell 2. At this time, the user can inspect the tuning fork unit 5 without disassembling the No. 1 threaded joint 4. At the same time, the upper shell 61 and the lower shell 57 are disassembled and connected through the No. 2 threaded joint 62. In daily use, the tuning fork structure 51 can be disassembled for maintenance and replacement, which reduces the cost of use. Different lengths of tuning fork structures 51 can be selected and installed according to the diameter of the pipeline, so that the tuning fork switch meets various working conditions. After the maintenance is completed, the handle 710 should be held to push the entire tuning fork unit 5 toward the bottom of the No. 1 threaded joint 4. When the clamping block 76 slides to the recessed part of the inner wall of the shell 2, the clamping block 76 and the shell 2 are engaged, and the lower shell 57 drives the sealing ring 58 to abut the bottom of the No. 1 threaded joint 4. At this time, the installation is completed.

[0049] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of the present invention is defined by the attached claims and their equivalents.

Claims

1. An IO-Link tuning fork switch, comprising a housing (2), wherein an end cover (1) is detachably connected to the housing (2), a connecting piece (3) is fixedly connected to the lower end of the housing (2), and a No. 1 threaded joint (4) is fixedly connected to the lower end of the connecting piece (3), wherein: The interior of the No. 1 threaded joint (4) is a hollow structure, the interior of the No. 1 threaded joint (4) is abutted against a lower shell (57), a plurality of tuning fork structures (51) are fixedly connected inside the lower shell (57), the plurality of tuning fork structures (51) are similar in shape but have different lengths, and the plurality of tuning fork structures (51) are arranged in a circular array in sequence according to their lengths.

2. The IO-Link tuning fork switch as claimed in claim 1, characterized in that The tuning fork structure (51) comprises a transition column (513), the transition column (513) being fixedly connected to the lower shell (57) via a shock-absorbing rubber (54), one end of the transition column (513) away from the lower shell (57) being fixedly connected to a connecting rod (511), and the lower end of the connecting rod (511) being fixedly connected to a vibration fork body (512).

3. The IO-Link tuning fork switch as claimed in claim 1, characterized in that: A sealing ring (58) is fixedly connected to the lower end of the lower shell (57), and the lower shell (57) is abutted against the internal hollow structure of the No. 1 threaded joint (4) through the sealing ring (58), and the sealing ring (58) plays a sealing role. A piezoelectric crystal module (55) is fixedly connected to the top of the transition column (513), and the piezoelectric crystal module (55) and the tuning fork structure (51) and the IO-Link module (56) are mutually associated, and the tuning fork structure (51), the piezoelectric crystal module (55) and the IO-Link module (56) form a tuning fork unit (5).

4. The IO-Link tuning fork switch as claimed in claim 3, characterized in that A No. 2 threaded joint (62) is provided on the lower shell (57), the No. 2 threaded joint (62) and the upper shell (61) are threadedly connected, and the lower shell (57) is connected to the upper shell (61) via the No. 2 threaded joint (62) to form a separation unit (6).

5. The IO-Link tuning fork switch as claimed in claim 4, characterized in that The upper shell (61) is provided with a disassembly unit (7), the disassembly unit (7) comprising a clamping block (76), the clamping block (76) being slidably engaged with the side wall of the upper shell (61), the clamping block (76) being slidably connected to the upper shell (61) via a supporting spring (77), a sliding hole (79) being provided in the middle of the clamping block (76), the sliding hole (79) being slidably connected to a stabilizing rod (78), the stabilizing rod (78) being fixedly connected to the upper shell (61), a handle (710) being fixedly connected to the top of the upper shell (61), and the clamping block (76) being slidably abutted against the inner wall of the outer shell (2).

6. The IO-Link tuning fork switch as claimed in claim 5, characterized in that: The clamping block (76) is in contact with the extrusion block (75); the clamping block (76) is engaged with a recessed portion of the inner wall of the housing (2); one end of the extrusion block (75) away from the clamping block (76) is fixedly connected to a T-shaped rod (71); the other end of the T-shaped rod (71) extends to the outside of the housing (2); an extrusion spring (72) is embedded on the T-shaped rod (71); two ends of the extrusion spring (72) are respectively in contact with the housing (2) and the T-shaped rod (71); one end of the extrusion block (75) away from the clamping block (76) is also fixedly connected to a pair of calibration rods (73); the calibration rods (73) are distributed on the upper and lower sides of the T-shaped rod (71); the calibration rods (73) cooperate with the calibration holes (74); and the calibration holes (74) are provided on the side wall of the housing (2).

7. The IO-Link tuning fork switch as claimed in claim 4, characterized in that: A pressure warning unit (8) is provided at the lower end of the No. 1 threaded joint (4). The pressure warning unit (8) includes a through hole (81). The through hole (81) is opened at the lower end of the No. 1 threaded joint (4). A piston (82) is slidably connected in the through hole (81). A slide rod (83) is fixedly connected to the upper end of the piston (82). A contraction spring (84) is nested on the slide rod (83). The lower end of the contraction spring (84) abuts against the piston (82). The upper end of the contraction spring (84) abuts against the lower end surface of the lower shell (57). The upper end of the slide rod (83) extends into the interior of the lower shell (57) and is fixedly connected to the push rod (86). A waterproof ring (85) is provided at the contact position between the slide rod (83) and the lower shell (57).

8. The IO-Link tuning fork switch as claimed in claim 7, characterized in that: The push rod (86) is in abutment with the metal membrane (87), the metal membrane (87) is fixedly connected to the lower end of the upper shell (61), and the metal membrane (87) and the lower shell (57) form a sealed cavity, in which a pressure sensor (88) is arranged.

9. The IO-Link tuning fork switch as claimed in claim 8, characterized in that A transmission unit (9) is provided on the upper shell (61), the transmission unit (9) comprises a detachable joint (91), the IO-Link module (56) is connected to a transmission line (92) via the detachable joint (91), and the tuning fork structure (51), the piezoelectric crystal module (55), the IO-Link module (56), the pressure sensor (88) and the transmission unit (9) are interrelated.

10. The IO-Link tuning fork switch as claimed in claim 8, characterized in that The metal film (87) is an arc-shaped metal film and has deformation recovery capability.

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