Miniaturized metal film box sensor convenient to install

Abstract

The utility model discloses a miniaturized metal film box sensor convenient to install, which comprises a base, the upper end of the base is movably connected with a transmission rod, the upper end of the transmission rod is fixedly connected with a detection head, the bottom end of the base is slidably connected with a plurality of groups of fixed rods, one side of each fixed rod is provided with an arc-shaped push block, and the middle part of the outer side of each push block is provided with a rotating groove. One end of the threaded rod is rotationally connected into the rotating groove, the end, connected with the push block, of the threaded rod is fixedly connected with a limiting ring, the locking assembly is used for limiting sliding of the fixing rod, and one side of the base is detachably connected with a data line. The metal film box sensor punching device has the advantages that the push block can push the fixing rods to move by rotating the locking knob, the metal film box sensor is fixed to the installation position through extrusion force between the fixing rods, the situation that punching needs to be conducted again due to the fact that the punching position does not correspond to a reserved installation hole is avoided, and meanwhile the fixing rods are concentric in moving direction; and the metal film box sensor is in the dead center after being installed, and calibration is not needed.

Description

Technical Field

[0001] The utility model belongs to the technical field of sensors, and in particular relates to a miniaturized metal membrane box sensor which is easy to install. Background Art

[0002] The metal diaphragm sensor is a sensor that uses thin film deformation sensitive elements to measure physical quantities such as pressure, temperature, liquid level, and displacement. Its main components include a diaphragm box, a connecting pipe and a measuring circuit. The diaphragm box is generally made of stainless steel, copper, alloy and other materials, and can withstand high pressure and high temperature. The working principle of the diaphragm box sensor is that when the measuring medium is applied to the diaphragm box, the film will deform, thereby changing the resistance value of the bridge circuit, and the pressure, temperature, liquid level, displacement and other physical quantities of the measured medium are obtained through the measuring circuit. The accuracy and stability of the diaphragm box sensor are affected by many factors such as material selection, structural design, processing technology, on-site installation and calibration. Publication No.: CN208860408U proposes a diaphragm box type vortex flow sensor, including a left connecting pipe, a right connecting pipe and a main connecting pipe, a sealing ring is installed between the connecting rod and the main connecting pipe, a diaphragm box body is installed at the inner center of the main connecting pipe near the left connecting pipe, a diaphragm box hard core is installed at the inner center of the diaphragm box body, one end of the diaphragm box hard core is connected to a C-shaped spring sheet, a protective layer is arranged between the diaphragm box hard core and the diaphragm box body, and metal diaphragms are installed on the outer surfaces of both ends of the protective layer. In the utility model, a diaphragm box hard core is installed in the center of the interior of the diaphragm box body, one end of the diaphragm box hard core is connected to a C-shaped spring sheet, a protective layer is provided between the diaphragm box hard core and the diaphragm box body, metal diaphragms are installed on the outer surfaces of both ends of the protective layer, the C-shaped spring sheet is in contact with the connecting rod, and a diaphragm box type metal diaphragm structure is adopted, which can reduce the influence of pipeline vibration on the sensing element and is convenient for long-term use.

[0003] However, there are some problems with the existing technology: when installing the existing metal diaphragm box sensor, it is necessary to punch a threaded hole corresponding to the reserved mounting hole of the metal diaphragm box sensor at the installation position, and then install it with screws. However, there may be deviations in the punching process, resulting in mismatch between the threaded hole and the reserved hole, and the installation is unstable, requiring re-punching and installation. Therefore, we propose a miniaturized metal diaphragm box sensor that is easy to install. Utility Model Content

[0004] In view of the problems existing in the prior art, the purpose of the utility model is to provide a miniaturized metal diaphragm box sensor that is easy to install. Through a slidable fixing rod and a locking assembly, the metal diaphragm box sensor can be stably fixed without corresponding holes during installation.

[0005] The utility model is implemented as follows: a miniaturized metal diaphragm box sensor which is easy to install comprises a base, a transmission rod is movably connected to the upper end of the base, a detection head is fixedly connected to the upper end of the transmission rod, a plurality of groups of fixed rods are slidably connected to the bottom end of the base, a locking assembly is arranged on one side of the fixed rod, the locking assembly is used to limit the sliding of the fixed rod, and a data line is detachably connected to one side of the base.

[0006] Optionally, a plurality of groups of grooves are provided at the bottom end of the base, a slideway is provided on the inner wall of the groove, a slide plate is fixedly connected to the top end of the fixing rod, and the slide plate is slidably connected in the slideway.

[0007] Optionally, the locking assembly includes a push block, which is arc-shaped and is used to push the fixing rod to slide in the slideway.

[0008] Optionally, it also includes a threaded rod, one end of which is rotated and connected to the push block, and one end of the threaded rod is fixedly connected to a locking knob, which is used to rotate the threaded rod.

[0009] Optionally, a rotation groove is opened in the push block, and the other end of the threaded rod is fixedly connected to a limit ring, which is rotatably connected in the rotation groove of the push block, and the limit ring is used to drive the push block to move.

[0010] Optionally, a threaded hole is opened on one side of the base, and the threaded rod passes through the threaded hole and is threadedly connected to the base, and the threaded rod rotates in the threaded hole.

[0011] Optionally, a thread is provided at the bottom end of the fixing rod, and a nut is threadedly connected to the bottom end of the fixing rod, and the nut is used to fix the base.

[0012] Optionally, a wire hole is opened on one side of the base, a thread is set in the wire hole, one end of the data cable is fixedly connected to a connector, the connector is provided with a thread matching the wire hole, and the connector is threadedly connected to the wire hole.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] 1. When installing the utility model, the hole punched at the installation location does not need to completely correspond to the installation hole reserved on the metal diaphragm box sensor. The threaded rod can be driven to rotate by turning the locking knob, and the push block can be driven to move by the threaded rod, so that the push block pushes the fixed rod to move, and the metal diaphragm box sensor is fixed at the installation location by the extrusion force between the fixed rods, avoiding the need to re-drill holes due to the position of the punched hole not corresponding to the reserved installation hole.

[0015] 2. The moving direction of the fixed rod of the utility model is the same center of a circle, so that the metal diaphragm box sensor is in the exact center after installation, and no recalibration is required.

[0016] 3. The data cable of the utility model adopts a detachable connection, which is convenient for repair and replacement when it is damaged.

[0017] Other features and advantages of the present invention will become apparent from the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram provided by the utility model;

[0019] Figure 2 It is a cross-sectional view of the base provided by the utility model;

[0020] Figure 3 It is a fixed rod diagram provided by the utility model;

[0021] Figure 4 It is a sectional view of a push block provided by the utility model.

[0022] In the figure: 1. base; 2. transmission rod; 3. detection head; 4. fixing rod; 5. locking assembly; 501. push block; 502. threaded rod; 503. locking knob; 504. limit ring; 6. slide; 7. nut; 8. wire hole; 9. data cable; 10. connector. DETAILED DESCRIPTION

[0023] In order to further understand the content, features and effects of the utility model, the following embodiments are given as examples and described in detail with reference to the accompanying drawings.

[0024] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that the relative arrangement of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention unless otherwise specifically stated.

[0025] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.

[0026] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered as part of the specification.

[0027] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0028] The structure of the utility model is described in detail below in conjunction with the accompanying drawings.

[0029] like Figures 1 to 4As shown, an embodiment of the utility model provides a miniaturized metal diaphragm box sensor that is easy to install, including a base 1. The base 1 is cylindrical and made of stainless steel. Of course, its shape is not limited to a cylinder, and it can also be set to other shapes such as a rectangle. A cavity is opened in the base 1, and a diaphragm box is arranged in the cavity. The diaphragm box is usually made of metal material or alloy material, and has a certain elasticity and toughness so that it can withstand pressure deformation, and then converted into an electrical signal through the circuit output. A diaphragm box support point is set in the center of the diaphragm box, which can support the diaphragm box and avoid the influence of external forces.

[0030] The base 1 is also provided with a sensor circuit and a signal processing circuit. The sensor circuit generally adopts the principle of a potentiometer sensor, that is, the pressure is measured by using the characteristic that the resistance value changes with deformation. Usually, an electrode is installed at each end of the membrane box, and the measurement is performed by powering it with an external power supply, and the measurement result is output as a voltage or current signal using a signal processing circuit. The signal processing circuit is mainly responsible for processing the electrical signal output by the sensor circuit to obtain a more accurate and true pressure value. Generally, it can be processed in the form of an integrated circuit such as a microprocessor or an operational amplifier so that the amplification degree of the voltage signal can be adjusted to improve the measurement precision and accuracy.

[0031] A transmission rod 2 is movably connected to the upper end of the base 1, and a detection head 3 is fixedly connected to the upper end of the transmission rod 2. The detection head 3 is used to receive pressure, and the pressure is then transmitted to the film box in the base 1 through the transmission rod 2, causing the film box to deform.

[0032] A plurality of fixed rods 4 are slidably connected to the bottom end of the base 1, a plurality of grooves are provided at the bottom end of the base 1, a slideway is provided on the inner wall of the groove, a slide plate 6 is fixedly connected to the top end of the fixed rod 4, and the slide plate 6 is slidably connected in the slideway. The size of the slide plate 6 is adapted to the slideway, and the slide plate 6 can slide in the slideway without falling off.

[0033] The fixing rod 4 is cylindrical and made of stainless steel. The fixing rod 4 is used to fix the metal diaphragm box sensor. The fixing rod 4 is set to four groups. Of course, the number is not limited and can also be set to three groups, five groups, etc. Anti-slip grooves can also be set on the fixing rod 4 to increase friction, so that the metal diaphragm box sensor is fixed more stably.

[0034] A locking assembly 5 is provided on one side of the fixed rod 4, and the locking assembly 5 is used to limit the sliding of the fixed rod 4. The locking assembly 5 includes a push block 501, and the push block 501 is arc-shaped. The push block 501 is used to push the fixed rod 4 to slide in the slideway. The push block 501 is made of stainless steel. The locking assembly 5 also includes a threaded rod 502, one end of the threaded rod 502 is rotated and connected to the push block 501, and one end of the threaded rod 502 is fixedly connected to a locking knob 503, and the locking knob 503 is used to rotate the threaded rod 502. A threaded hole is provided on one side of the base 1, and the threaded rod 502 passes through the threaded hole and is threadedly connected to the base 1. The threaded rod 502 rotates in the threaded hole, and rotating the locking knob 503 will drive the threaded rod 502 to rotate, and the threaded rod 502 will move in the threaded hole of the base 1 when it rotates.

[0035] A rotation groove is opened in the push block 501, and the other end of the threaded rod 502 is fixedly connected to a limit ring 504. The limit ring 504 is rotatably connected in the rotation groove of the push block 501, and the limit ring 504 is used to drive the push block 501 to move. When the threaded rod 502 moves in the threaded hole of the base 1, it drives the limit ring 504 to move, and the limit ring 504 drives the push block 501 to move. The push block 501 will push the fixed rod 4, so that the fixed rods 4 are squeezed against each other to fix the metal diaphragm box sensor at the installation location.

[0036] A thread is provided at the bottom end of the fixing rod 4, and a nut 7 is threadedly connected to the bottom end of the fixing rod 4. The nut 7 is used to fix the base 1. The nut 7 is locked by rotating it to prevent the metal diaphragm box sensor from sliding up and down, resulting in unstable fixation.

[0037] A data cable 9 is detachably connected to one side of the base 1, and a wire hole 8 is opened on one side of the base 1. A thread is arranged in the wire hole 8. One end of the data cable 9 is fixedly connected to a connector 10, and the connector 10 is provided with a thread matching the wire hole 8. The connector 10 is threadedly connected to the wire hole 8. When the data cable 9 is damaged, it can be conveniently removed for repair or replacement.

[0038] The working principle of the utility model is as follows:

[0039] When installing the metal diaphragm box sensor, a mounting hole corresponding to the reserved hole on the metal diaphragm box sensor is drilled at the mounting location, the fixing rod 4 is inserted into the mounting hole, and then the locking knob 503 is turned to drive the threaded rod 502 to rotate. The threaded rod 502 moves inward after rotation, pushing the push block 501 to move inward, and the push block 501 will push the fixing rod 4 to move. The fixing rods 4 are squeezed against each other to fix the metal diaphragm box sensor at the mounting location, and the metal diaphragm box sensor cannot shake left and right. Thereafter, the nut 7 is tightened, and the metal diaphragm box sensor cannot shake up and down, and the metal diaphragm box sensor will be stably installed at the mounting location.

[0040] When the metal diaphragm box sensor needs to be disassembled, the nut 7 is loosened, and the locking knob 503 is rotated in the reverse direction to loosen the fixing rod 4, and the metal diaphragm box sensor can be removed.

[0041] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0042] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A miniaturized metal diaphragm sensor that is easy to install, comprising a base (1), characterized in that: The upper end of the base (1) is movably connected to a transmission rod (2), the upper end of the transmission rod (2) is fixedly connected to a detection head (3), the lower end of the base (1) is slidably connected to a plurality of groups of fixed rods (4), one side of the fixed rod (4) is provided with a locking assembly (5), the locking assembly (5) is used to limit the sliding of the fixed rod (4), and one side of the base (1) is detachably connected to a data cable (9).

2. A miniaturized metal diaphragm sensor that is easy to install according to claim 1, characterized in that: The bottom end of the base (1) is provided with a plurality of grooves, the inner wall of the groove is provided with a slideway, the top end of the fixing rod (4) is fixedly connected with a slide plate (6), and the slide plate (6) is slidably connected in the slideway.

3. The miniaturized metal diaphragm sensor that is easy to install according to claim 1 is characterized in that: The locking assembly (5) comprises a push block (501), the push block (501) is arc-shaped, and the push block (501) is used to push the fixing rod (4) to slide in the slideway.

4. A miniaturized metal diaphragm sensor that is easy to install according to claim 3, characterized in that: It also includes a threaded rod (502), one end of which is rotated and connected to the push block (501), and one end of which is fixedly connected to a locking knob (503), and the locking knob (503) is used to rotate the threaded rod (502).

5. The miniaturized metal diaphragm sensor that is easy to install according to claim 4 is characterized in that: A rotation groove is provided in the push block (501), and the other end of the threaded rod (502) is fixedly connected to a limit ring (504). The limit ring (504) is rotatably connected in the rotation groove of the push block (501), and the limit ring (504) is used to drive the push block (501) to move.

6. The miniaturized metal diaphragm sensor that is easy to install according to claim 4 is characterized in that: A threaded hole is provided on one side of the base (1), the threaded rod (502) passes through the threaded hole and is threadedly connected to the base (1), and the threaded rod (502) rotates in the threaded hole.

7. The miniaturized metal diaphragm sensor that is easy to install according to claim 1 is characterized in that: The bottom end of the fixing rod (4) is provided with a thread, and the bottom end of the fixing rod (4) is threadedly connected with a nut (7), and the nut (7) is used to fix the base (1).

8. The miniaturized metal diaphragm sensor that is easy to install according to claim 1 is characterized in that: A wire hole (8) is provided on one side of the base (1), a thread is provided in the wire hole (8), one end of the data cable (9) is fixedly connected to a connector (10), a thread matching the wire hole (8) is provided on the connector (10), and the connector (10) is threadedly connected to the wire hole (8).

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