A simple structure of a pressure transmitter for mining

Abstract

The present invention provides a simplified structure of a pressure transmitter for mining, which includes: a base, a shell, a pressure sensor, a fixing frame, a printed circuit board and a socket assembly. The base is connected to the shell, the pressure sensor is at least partially arranged in the shell, and the printed circuit board is fixed in the shell through the fixing frame. The pressure sensor is electrically connected to the printed circuit board, and the printed circuit board is electrically connected to the socket assembly. A pressure-inducing hole is provided inside the base, and a damping hole is provided at one end of the base away from the shell, and the damping hole is connected to the pressure-inducing hole. The shell is connected to the pressure-inducing hole, and the sensing end of the pressure sensor is arranged at one end of the pressure-inducing hole facing away from the damping hole, for sensing the pressure transmitted from the pressure-inducing hole. The simplified structure of the pressure transmitter for mining has a more compact structure and a more compact appearance, and the size of the whole machine is exquisitely simplified, which can meet the use requirements in some special working environments. The reduction of production and assembly processes facilitates automated production.

Description

Technical Field

[0001] The invention relates to the field of locking wire structures, in particular to a simple structure of a pressure transmitter for mining. Background Art

[0002] Pressure transmitter is a device that converts pressure into pneumatic or electric signals for control and remote transmission. Pressure transmitter is the most commonly used sensor in industrial practice. It is widely used in various industrial automatic control environments, involving water conservancy and hydropower, railway transportation, intelligent buildings, production automatic control, aerospace, military industry, petrochemical, oil wells, electricity, ships, machine tools, pipelines and many other industries. The electrical component that senses pressure in the pressure transmitter is generally a resistance strain gauge, which is a sensitive device that converts the pressure on the measured piece into an electrical signal. The most commonly used resistance strain gauges are metal resistance strain gauges and semiconductor strain gauges. Metal resistance strain gauges are divided into wire strain gauges and metal foil strain gauges. Usually, the strain gauge is tightly bonded to the mechanical strain matrix through a special adhesive. When the matrix is ​​subjected to stress and the stress changes, the resistance strain gauge also deforms, causing the resistance value of the strain gauge to change, thereby changing the voltage applied to the resistor.

[0003] However, mining refers to the extraction of naturally occurring minerals such as solids, liquids or gases, including underground or above-ground mining, the operation of mines, and all auxiliary work generally carried out at or near the mine site to process raw materials. Mining pressure transmitters are special products for their specific fields, which must meet mining standards, such as intrinsic safety and explosion-proof requirements, and have technical requirements for the overall appearance, material selection, electronic circuits, output lines, wall thickness and threads of the product. However, traditional mining pressure transmitters have complex structures and large volumes, and cannot meet the use requirements in some special working environments. Summary of the invention

[0004] Based on this, it is necessary to provide a simplified structure of a mining pressure transmitter to address the technical problems that traditional mining pressure transmitters have complex structures, large volumes, and cannot meet the use requirements in some special working environments.

[0005] A simple structure of a pressure transmitter for mining, comprising: a base, a shell, a pressure sensor, a fixing frame, a printed circuit board and a socket assembly;

[0006] The base is connected to the housing, the pressure sensor is at least partially disposed in the housing, and the printed circuit board is fixed in the housing through the fixing frame; the pressure sensor is electrically connected to the printed circuit board, and the printed circuit board is electrically connected to the socket assembly;

[0007] A pressure-inducing hole is provided inside the base, and a damping hole is provided at one end of the base away from the shell, and the damping hole is connected to the pressure-inducing hole; the shell is connected to the pressure-inducing hole, and the sensing end of the pressure sensor is arranged at the end of the pressure-inducing hole facing away from the damping hole, for sensing the pressure transmitted from the pressure-inducing hole.

[0008] In one of the embodiments, the printed circuit board is electrically connected to the socket assembly via at least one S-shaped spring clip.

[0009] In one embodiment, the pressure sensor is a silicon strain gauge sensor with a stress ring.

[0010] In one of the embodiments, the pressure sensor is connected to the base via a screw.

[0011] In one of the embodiments, the pressure sensor is welded to the base.

[0012] In one of the embodiments, the fixing frame is detachably connected to the shell.

[0013] In one of the embodiments, a connecting hole is provided at one end of the base close to the shell, and the connecting hole is connected to the pressure-inducing hole; an internal thread is provided on the inner wall of the connecting hole, and an external thread is provided at the sensing end of the pressure sensor, and the internal thread is adapted to the external thread, and the sensing end of the pressure sensor is inserted into the connecting hole and connected to the base.

[0014] In one embodiment, a portion of the base at the open end of the connecting hole is welded and sealed to a sensing end of the pressure sensor.

[0015] In one of the embodiments, the printed circuit board is detachably connected to the fixing frame.

[0016] In one of the embodiments, the printed circuit board is clamped to the fixing frame.

[0017] During the operation of the simplified structure of the above-mentioned pressure transmitter for mining, the base is installed on the external pressure source, and the air pressure generated by the pressure source enters the pressure-inducing hole after passing through the damping hole. The sensing end of the pressure sensor senses the air pressure in the pressure-inducing hole and transmits the corresponding pressure signal to the printed circuit board. The printed circuit board is electrically connected to the external power supply through the socket assembly. The simplified structure of the above-mentioned pressure transmitter for mining has a more compact structure and a more compact appearance. The size of the whole machine is exquisitely simplified, which can meet the use requirements in some special working environments. The stability of the simplified structure of the above-mentioned pressure transmitter for mining is increased, and the impact resistance is enhanced. Due to the reduction of production and assembly processes, it is convenient for automated production, quality problems caused by human factors will be greatly reduced, and the stability of the product will also be greatly improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of a simplified structure of a pressure transmitter for mining in one embodiment;

[0019] Figure 2 Schematic diagram of the structure of the locking wire structure in one embodiment. DETAILED DESCRIPTION

[0020] In order to make the above-mentioned purpose, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth so as to fully understand the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below. In the description of the present invention, it should be understood that the orientation or position relationship indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like is based on the orientation or position relationship shown in the accompanying drawings, only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention.

[0021] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0022] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0023] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0024] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0025] See also Figure 1 The present invention provides a simple structure 10 of a pressure transmitter for mining. The simple structure 10 of the pressure transmitter for mining includes: a base 100, a housing 200, a pressure sensor 300, a fixing frame 400, a printed circuit board 500 and a socket assembly 600.

[0026] The base 100 is connected to the housing 200, the pressure sensor 300 is at least partially disposed in the housing 200, and the printed circuit board 500 is fixed in the housing 200 through the fixing frame 400. The pressure sensor 300 is electrically connected to the printed circuit board 500, and the printed circuit board 500 is electrically connected to the socket assembly 600. In this embodiment, the pressure sensor 300 is a silicon strain gauge sensor with a stress ring, and the silicon strain gauge sensor with a stress ring has a high overload capacity and excellent working stability, which can improve the durability of the simple structure 10 of the mining pressure transmitter and broaden the scope of application of the simple structure 10 of the mining pressure transmitter.

[0027] A pressure-inducing hole 101 is provided inside the base 100, and a damping hole 102 is provided at one end of the base 100 away from the housing 200, and the damping hole 102 is connected to the pressure-inducing hole 101. The housing 200 is connected to the pressure-inducing hole 101, and the sensing end of the pressure sensor 300 is arranged at one end of the pressure-inducing hole 101 facing away from the damping hole 102, for sensing the pressure transmitted from the pressure-inducing hole 101.

[0028] In order to improve the production efficiency of the simple structure 10 of the mining pressure transmitter, please refer to Figure 1In one embodiment, the printed circuit board 500 is electrically connected to the socket assembly 600 through at least one S-shaped spring clip 510. In this embodiment, the printed circuit board 500 is electrically connected to the socket assembly 600 through three S-shaped spring clips 510. In another embodiment, the printed circuit board 500 is electrically connected to the socket assembly 600 through two S-shaped spring clips 510. The way in which the printed circuit board 500 is electrically connected to the socket assembly 600 through the S-shaped spring clip 510 is convenient, fast, and reliable, and can realize the electrical connection between the printed circuit board 500 and the socket assembly 600 in a short time, greatly improving the production efficiency of the pressure transmitter and facilitating the automated production of the pressure transmitter. In this way, the S-shaped spring clip 510 improves the production efficiency of the simple structure 10 of the mining pressure transmitter.

[0029] In order to facilitate installation and disassembly of the simple structure 10 of the pressure transmitter for mining, in one embodiment, the fixing frame 400 is detachably connected to the housing 200. In another embodiment, the fixing frame 400 is welded to the housing 200. In addition, the printed circuit board 500 is detachably connected to the fixing frame 400. Specifically, the printed circuit board 500 is snap-fitted to the fixing frame 400. In this way, the performance of the simple structure 10 of the pressure transmitter for mining is improved to facilitate installation and disassembly.

[0030] In order to improve the connection stability between the pressure sensor 300 and the base 100, in one embodiment, the pressure sensor 300 is connected to the base 100 by a screw. In another embodiment, the pressure sensor 300 is welded to the base 100. In this embodiment, a connection hole (not shown) is provided at one end of the base 100 close to the housing 200, and the connection hole is connected to the pressure-inducing hole 101. An internal thread is provided on the inner wall of the connection hole, and the sensing end of the pressure sensor 300 is provided with an external thread, which is adapted to the external thread. The sensing end of the pressure sensor 300 is inserted into the connection hole and screwed to the base 100. Further, the part of the base 100 at the opening end of the connection hole is welded and sealed with the sensing end of the pressure sensor 300 to increase the sealing of the simple structure 10 of the pressure transmitter, thereby increasing the measurement accuracy and working stability of the simple structure 10 of the mining pressure transmitter. In this way, the connection stability of the pressure sensor 300 and the base 100 is improved.

[0031] During the operation of the simplified structure 10 of the pressure transmitter for mining, the base 100 is installed to an external pressure source, and the air pressure generated by the pressure source enters the pressure-inducing hole 101 through the damping hole 102. The sensing end of the pressure sensor 300 senses the air pressure in the pressure-inducing hole 101 and transmits the corresponding pressure signal to the printed circuit board 500. The printed circuit board 500 is electrically connected to the external power supply through the socket assembly 600. The simplified structure 10 of the pressure transmitter for mining has a more compact structure and a more compact appearance, and the size of the whole machine is exquisitely simplified, which can meet the use requirements in some special working environments. The stability of the simplified structure 10 of the pressure transmitter for mining is increased, and the impact resistance is enhanced. Due to the reduction of production and assembly processes, it is convenient for automated production, quality problems caused by human factors will be greatly reduced, and the stability of the product will also be greatly improved.

[0032] In order to improve the sealing performance of the simple structure 10 of the mining pressure transmitter, please refer to Figure 1 and Figure 2The simplified structure 10 of the pressure transmitter for mining also includes a locking wire structure 700, which includes: a wiring shell 710, a fastener 720, a soft sealing block 730 and a cable 740. The wiring shell 710 is connected to the housing 200, and the wiring shell 710 is communicated with the housing 200. The wiring shell 710 is provided with a through hole 701, an extrusion cavity 702 and a fixing hole 703, and the through hole 701 is communicated with the fixing hole 703 through the extrusion cavity 702. An external thread is provided on the outer wall of the fastener 720, and an internal thread is provided on the inner wall of the fixing hole 703, and the external thread is adapted to the internal thread. The fastener 720 is at least partially inserted into the fixing hole 703 and is screwed with the wiring shell 710. The extrusion cavity 702 is a conical cavity, the soft sealing block 730 is a cone, the tip of the soft sealing block 730 is arranged near the penetration hole 701, the soft sealing block 730 is adapted to the extrusion cavity 702, the soft sealing block 730 is accommodated in the extrusion cavity 702 and abuts against one end of the fastener 720 inserted in the fixing hole 703. A first penetration hole 704 is provided at one end of the soft sealing block 730, and the first penetration hole 704 passes through the soft sealing block 730. A second penetration hole 705 is provided at one end of the fastener 720, and the second penetration hole 705 passes through the fastener 720. The penetration hole 701, the first penetration hole 704 and the second penetration hole 705 are all adapted to the cable 740, and the cable 740 passes through the penetration hole 701, the first penetration hole 704 and the second penetration hole 705 in sequence and abuts against the wiring shell 710, the soft sealing block 730 and the fastener 720 respectively. The cable 740 passes through the wiring shell 710 and the housing 200 and is electrically connected to the socket assembly 600. During operation, the locking wire structure 700 sequentially passes the cable 740 through the through hole 701, the first through hole 704 and the second through hole 705 and respectively contacts the wiring shell 710, the soft sealing block 730 and the fastener 720, and rotates the fastener 720 to move the fastener 720 in the fixing hole 703. When the fastener 720 moves in the fixing hole 703, it combines with the extrusion cavity 702 to squeeze the soft sealing block 730. The soft sealing block 730 is deformed after being squeezed, so that the soft sealing block 730 tightly wraps the cable 740, and squeezes and fixes the cable 740 passing through the first through hole 704. Under the premise of ensuring a high protection level requirement, the locking wire structure 700 has a simple and exquisite structure, low cost, and is easy to install or disassemble, thereby improving the sealing performance of the simple structure 10 of the mining pressure transmitter.

[0033] To facilitate turning fastener 720, refer to Figure 2In one embodiment, a rotating handle 721 is provided at one end of the fastener 720 away from the soft sealing block 730, so that the fastener 720 can be rotated manually by rotating the handle 721. In this embodiment, the rotating handle 721 is provided with anti-skid patterns to increase the anti-skid performance of the rotating handle 721 and increase the friction between the rotating handle 721 and the hand. In another embodiment, a protective cover is provided on the rotating handle 721 to protect the hand from being scratched. Further, the protective cover is a soft rubber cover, which has certain elasticity, good toughness and excellent anti-skid performance, and can increase the friction between the hand and the rotating handle 721 while protecting the hand. In one embodiment, the protective cover is a soft plastic cover. In another embodiment, the protective cover is a soft silicone cover. Further, the protective cover is provided with anti-skid patterns to increase the anti-skid performance of the protective cover and increase the friction between the protective cover and the hand. In this way, the rotating handle 721 provided at one end of the fastener 720 away from the soft sealing block 730 facilitates the rotation of the fastener 720 .

[0034] To increase the working stability of the lock wire structure 700, please refer to Figure 2 In one embodiment, the locking wire structure 700 further includes an extrusion gasket 750, which is disposed between the soft sealing block 730 and the fastener 720, and the fastener 720 abuts against the soft sealing block 730 through the extrusion gasket 750. A third through-hole 706 is provided on the extrusion gasket 750, and the third through-hole 706 is adapted to the cable 740, and the cable 740 passes through the third through-hole 706. Further, in this embodiment, one end of the soft sealing block 730 abutting against the fastener 720 is a cylinder. The cable 740 is passed through the through hole 701, the first through hole 704, the third through hole 706 and the second through hole 705 in sequence and respectively abuts against the wiring shell 710, the soft sealing block 730, the extrusion gasket 750 and the fastener 720, and the fastener 720 is rotated to move the fastener 720 in the fixing hole 703. When the fastener 720 moves in the fixing hole 703, the extrusion gasket 750 is pushed to move close to the soft sealing block 730, and the soft sealing block 730 is extruded in combination with the extrusion cavity 702. After being extruded, the soft sealing block 730 is deformed, so that the soft sealing block 730 tightly wraps the cable 740, and the cable 740 passing through the first through hole 704 is extruded and fixed. In this way, the extrusion gasket 750 further increases the working stability of the locking wire structure 700.

[0035] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0036] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A simple structure of a pressure transmitter for mining, characterized in that: include: Base, housing, pressure sensor, mounting bracket, printed circuit board, and socket assembly; The base is connected to the housing, the pressure sensor is at least partially disposed in the housing, and the printed circuit board is fixed in the housing through the fixing frame; the pressure sensor is electrically connected to the printed circuit board, and the printed circuit board is electrically connected to the socket assembly; A pressure-inducing hole is provided inside the base, a damping hole is provided at one end of the base away from the shell, and the damping hole is communicated with the pressure-inducing hole; the shell is communicated with the pressure-inducing hole, and the sensing end of the pressure sensor is arranged at one end of the pressure-inducing hole facing away from the damping hole, for sensing the pressure transmitted from the pressure-inducing hole; The simplified structure of the mining pressure transmitter also includes a locking wire structure, which includes: a wiring shell, a fastener, a soft sealing block and a cable; the wiring shell is connected to the shell, and the wiring shell is communicated with the shell; the wiring shell is provided with a through hole, an extrusion cavity and a fixing hole, and the through hole is communicated with the fixing hole through the extrusion cavity; an external thread is provided on the outer wall of the fastener, and an internal thread is provided on the inner wall of the fixing hole, the external thread is adapted to the internal thread, and the fastener is at least partially inserted into the fixing hole and screwed with the wiring shell; the extrusion cavity is a conical cavity, the soft sealing block is a cone, the tip of the soft sealing block is arranged close to the through hole, the soft sealing block is adapted to the extrusion cavity, the soft sealing block is accommodated in the extrusion cavity and abuts against one end of the fastener inserted in the fixing hole; a first through hole is provided at one end of the soft sealing block, and the first through hole penetrates the soft sealing block; a second through hole is provided at one end of the fastener, and the second through hole penetrates the fastener; The through hole, the first through hole and the second through hole are all adapted to the cable. The cable passes through the through hole, the first through hole and the second through hole in sequence and respectively abuts against the wiring shell, the soft sealing block and the fastener; the cable passes through the wiring shell, the housing and is electrically connected to the socket assembly.

2. The simplified structure of the mining pressure transmitter according to claim 1 is characterized in that: The printed circuit board is electrically connected to the socket assembly via at least one S-shaped spring.

3. The simplified structure of the mining pressure transmitter according to claim 1 is characterized in that: The pressure sensor is a silicon strain gauge sensor with a stress ring.

4. The simplified structure of the mining pressure transmitter according to claim 1 is characterized in that: The pressure sensor is connected to the base via a screw.

5. The simplified structure of the mining pressure transmitter according to claim 1 is characterized in that: The pressure sensor is welded to the base.

6. The simplified structure of the mining pressure transmitter according to claim 1 is characterized in that: The fixing frame is detachably connected to the shell.

7. The simplified structure of the mining pressure transmitter according to claim 1 is characterized in that: A connecting hole is provided at one end of the base close to the shell, and the connecting hole is connected to the pressure-inducing hole; an internal thread is provided on the inner wall of the connecting hole, and an external thread is provided at the sensing end of the pressure sensor, and the internal thread is adapted to the external thread; the sensing end of the pressure sensor is inserted into the connecting hole and connected to the base.

8. The simplified structure of the mining pressure transmitter according to claim 7 is characterized in that: The portion of the base at the opening end of the connecting hole is welded and sealed to the sensing end of the pressure sensor.

9. The simplified structure of the mining pressure transmitter according to claim 1 is characterized in that: The printed circuit board is detachably connected to the fixing frame.

10. The simplified structure of the mining pressure transmitter according to claim 9, characterized in that: The printed circuit board is clamped with the fixing frame.

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