Explosion-proof pressure transmitter

Abstract

The utility model discloses an explosion-proof pressure transmitter, which comprises a pressure transmitter main body and a mounting underframe, a fixing bottom plate is fixedly installed at the upper top end of the installation bottom frame, limiting straight sliding grooves are formed in the two sides of the upper end face of the fixing bottom plate, a main rotating shaft is rotationally connected to the rear top end of the fixing bottom plate through a rotating shaft, and a first synchronous wheel and a second synchronous wheel are fixedly installed on the outer curved surface of the main rotating shaft in sequence from front to back. The outer ends of the first synchronous wheel and the second synchronous wheel are in transmission connection with a third synchronous wheel and a fourth synchronous wheel through synchronous belts correspondingly, and a first transmission screw and a second transmission screw are fixedly installed in the middle of the third synchronous wheel and the middle of the fourth synchronous wheel. The outer curved surfaces of the two side ends of the first transmission screw and the second transmission screw are in threaded connection with sliding blocks correspondingly. According to the utility model, the safety protection of the pressure transmitter main body is realized, and the explosion-proof housing is conveniently and synchronously opened or closed to repair and maintain the pressure transmitter main body.

Description

Technical Field

[0001] The utility model relates to the technical field of pressure transmitters, in particular to an explosion-proof pressure transmitter. Background Art

[0002] Pressure transmitter refers to a pressure sensor with a standard output signal. It is an instrument that receives pressure variables and converts them into standard output signals in proportion. It can convert physical pressure parameters such as gas and liquid sensed by the pressure measuring element sensor into standard electrical signals to supply secondary instruments such as indicator alarms, recorders, and regulators for measurement, indication, and process regulation. Pressure transmitters are widely used in many industries such as water conservancy and hydropower, railway transportation, intelligent buildings, production automation, aerospace, military industry, petrochemicals, oil wells, electricity, ships, machine tools, pipelines, etc.

[0003] Among them, since the pressure transmitter is a field instrument that is in direct contact with the measured medium, it often works in an environment of high temperature, low temperature, corrosion, vibration and impact. Therefore, an explosion-proof structure is installed outside the pressure transmitter to protect the pressure transmitter.

[0004] However, in actual use of the prior art, when installing an explosion-proof structure on the outside of the pressure transmitter, the explosion-proof structure is usually fixedly installed on the outside of the pressure transmitter, resulting in the need to dismantle the explosion-proof structure before performing inspection and maintenance on the pressure transmitter, thereby affecting the inspection and maintenance efficiency of the pressure transmitter. Utility Model Content

[0005] The purpose of the utility model is to provide an explosion-proof pressure transmitter to solve the problem raised in the above-mentioned background technology that when installing an explosion-proof structure on the outside of the pressure transmitter, the usual explosion-proof structure is fixedly installed on the outside of the pressure transmitter, resulting in the need to dismantle the explosion-proof structure before overhauling and maintaining the pressure transmitter, thereby affecting the overhaul and maintenance efficiency of the pressure transmitter.

[0006] In order to achieve the above-mentioned purpose, the utility model provides the following technical solution: comprising a pressure transmitter body and a mounting base;

[0007] A fixed base plate is fixedly installed on the top of the mounting frame, and limited straight sliding grooves are provided on both sides of the upper surface of the fixed base plate. The rear top of the fixed base plate is rotatably connected to the main rotating shaft through a rotating shaft. The outer curved surface of the main rotating shaft is fixedly installed with a first synchronous wheel and a second synchronous wheel in sequence from front to back. The outer ends of the first synchronous wheel and the second synchronous wheel are respectively connected to the third synchronous wheel and the fourth synchronous wheel through synchronous belt transmission. The middle of the third synchronous wheel and the fourth synchronous wheel is fixedly installed with a first transmission screw and a second transmission screw. The outer curved surfaces of the two side ends of the first transmission screw and the second transmission screw are respectively threadedly connected with sliders, and an explosion-proof shell for safety protection of the pressure transmitter body is fixedly installed on the top of the slider;

[0008] A clamping opening is provided in the middle of the inner side of the explosion-proof shell, a through hole is provided in the middle of the front end surface of the explosion-proof shell, and heat dissipation holes are provided at both side ends of the explosion-proof shell.

[0009] Preferably, fixing holes are formed through the four corners of the lower end of the mounting base, and there are four fixing holes, which are symmetrically distributed at the four corners of the lower end of the mounting base, so that the mounting base can be installed and fixed by connecting bolts through the fixing holes.

[0010] Preferably, the pressure transmitter body is fixedly installed through the middle of the upper end of the fixed bottom plate, and there are two limiting straight sliding grooves, which are symmetrically distributed on both sides of the upper end surface of the fixed bottom plate.

[0011] Preferably, the outer curved surface at the front end of the main shaft is threadedly connected with a fastening nut for fastening and locking the main shaft, and the outer top end of the main shaft is fixedly provided with a knob for rotating the main shaft.

[0012] Preferably, both side ends of the first transmission screw and the second transmission screw are rotatably connected to both sides of the inner wall of the limiting straight sliding groove through a rotating shaft, and the outer curved surface threads of both side ends of the first transmission screw and the second transmission screw themselves face opposite directions.

[0013] Preferably, there are four sliders, each two of which form a group, and the two groups of sliders are symmetrically distributed on both side ends of the first transmission screw and the second transmission screw, and the outer sides of the sliders are movably connected to the inner wall of the limiting straight sliding groove.

[0014] Preferably, the lower end of the explosion-proof housing is movably connected to the upper end surface of the fixed base plate.

[0015] Preferably, the pipeline parts at the upper and lower ends of the pressure transmitter body are movably connected to the inner wall of the clamping opening, and the pipeline part at the front end of the pressure transmitter body is movably connected to the inner wall of the through hole.

[0016] Compared with the prior art, the beneficial effects of the utility model are:

[0017] 1. When the first transmission screw and the second transmission screw rotate synchronously, the slider will be driven to move synchronously inward or outward due to the force generated by the threaded connection with the outer curved surfaces of the two side ends of the first transmission screw and the second transmission screw. When the slider moves synchronously outward or inward, it will move linearly along the inner wall of the limit straight slide groove. When the slider moves synchronously outward or inward linearly, it will drive the explosion-proof shell to open outward or close inward synchronously, thereby realizing safety protection of the pressure transmitter body and facilitating the synchronous opening or closing of the explosion-proof shell to inspect and maintain the pressure transmitter body;

[0018] 2. The utility model can also play a role in installing and protecting the pressure transmitter body through the clamping opening and the through hole without affecting the connection between the pressure transmitter body and the external pipeline and the display of the measured value. At the same time, the heat dissipation hole can play a role in dissipating the heat of the pressure transmitter body. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the overall structure of an explosion-proof pressure transmitter of the utility model;

[0020] Figure 2 This is a partial structural diagram of an explosion-proof pressure transmitter of the utility model;

[0021] Figure 3 The utility model is a cross-sectional schematic diagram of the overall structure of an explosion-proof pressure transmitter.

[0022] In the figure: 1. Pressure transmitter body; 2. Mounting base; 3. Fixing hole; 4. Fixed bottom plate; 5. Limiting straight slide groove; 6. Main shaft; 7. First synchronous wheel; 8. Second synchronous wheel; 9. Third synchronous wheel; 10. Fourth synchronous wheel; 11. First transmission screw; 12. Second transmission screw; 13. Sliding block; 14. Explosion-proof housing; 15. Clamping opening; 16. Through hole; 17. Heat dissipation hole. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] See also Figure 1-3The utility model provides a technical solution: including a pressure transmitter body 1 and a mounting base 2, wherein fixing holes 3 are provided at the four corners of the lower end of the mounting base 2, and there are four fixing holes 3, which are symmetrically distributed at the four corners of the lower end of the mounting base 2, so that the mounting base 2 can be installed and fixed by the fixing holes 3 and the connecting bolts;

[0025] A fixed base plate 4 is fixedly installed on the top of the mounting base 2, and the pressure transmitter body 1 is fixedly installed in the middle of the upper end of the fixed base plate 4. Limited straight slide grooves 5 are provided on both sides of the upper end surface of the fixed base plate 4, and there are two limited straight slide grooves 5, which are symmetrically distributed on both sides of the upper end surface of the fixed base plate 4. The rear top of the fixed base plate 4 is rotatably connected with the main rotating shaft 6 through a rotating shaft, and the outer curved surface at the front end of the main rotating shaft 6 is threadedly connected with a fastening nut for fastening and locking the main rotating shaft 6. A knob for rotating the main rotating shaft 6 is fixedly installed on the outer top of the main rotating shaft 6. The outer curved surface of the main rotating shaft 6 is fixedly installed with a first synchronous wheel 7 and a second synchronous wheel 8 in sequence from front to back. The outer ends of the first synchronous wheel 7 and the second synchronous wheel 8 are respectively connected with a third synchronous wheel 9 and a fourth synchronous wheel 10 through a synchronous belt drive. The third synchronous wheel The first transmission screw 11 and the second transmission screw 12 are fixedly installed in the middle of the step wheel 9 and the fourth synchronous wheel 10, and the two side ends of the first transmission screw 11 and the second transmission screw 12 are respectively connected to the two sides of the inner wall of the limiting straight slide groove 5 through the rotating shaft, and the outer curved surface threads of the two side ends of the first transmission screw 11 and the second transmission screw 12 are in opposite directions, so that when the main shaft 6 is driven to rotate by the knob, the main shaft 6 will synchronously drive the first synchronous wheel 7 and the second synchronous wheel 8 to rotate synchronously, and when the first synchronous wheel 7 and the second synchronous wheel 8 rotate synchronously, the third synchronous wheel 9 and the fourth synchronous wheel 10 will be driven to rotate synchronously through the synchronous belt, and when the third synchronous wheel 9 and the fourth synchronous wheel 10 rotate synchronously, the first transmission screw 11 and the second transmission screw 12 will be driven to rotate synchronously;

[0026] The outer curved surfaces on both sides of the first transmission screw 11 and the second transmission screw 12 are respectively threadedly connected with sliders 13, and there are four sliders 13, each two sliders 13 form a group, and the two groups of sliders 13 are symmetrically distributed on the two sides of the first transmission screw 11 and the second transmission screw 12, respectively. The outer sides of the sliders 13 are movably connected to the inner wall of the limiting straight slide groove 5, and an explosion-proof shell 14 for safely protecting the pressure transmitter body 1 is fixedly installed on the top of the slider 13, and the lower end of the explosion-proof shell 14 is movably connected to the upper end surface of the fixed bottom plate 4, and the outer curved surfaces of the first transmission screw 11 and the second transmission screw 12 themselves The threads face the same. On the contrary, when the first transmission screw 11 and the second transmission screw 12 rotate synchronously, the slider 13 will be driven to move synchronously inward or outward due to the force generated by the threaded connection with the outer curved surfaces of the two side ends of the first transmission screw 11 and the second transmission screw 12. When the slider 13 moves synchronously outward or inward, it will move linearly along the inner wall of the limiting straight slide groove 5. When the slider 13 moves synchronously outward or inward linearly, it will drive the explosion-proof housing 14 to open outward or close inward synchronously, thereby realizing safety protection for the pressure transmitter body 1 while facilitating the synchronous opening or closing of the explosion-proof housing 14 to inspect and maintain the pressure transmitter body 1.

[0027] A clamping opening 15 is provided in the middle of the inner side of the explosion-proof shell 14, and the pipeline parts at the upper and lower ends of the pressure transmitter body 1 are movably connected to the inner wall of the clamping opening 15. A through hole 16 is provided in the middle of the front end surface of the explosion-proof shell 14, and the pipeline part at the front end of the pressure transmitter body 1 is movably connected to the inner wall of the through hole 16. Heat dissipation holes 17 are provided on both sides of the explosion-proof shell 14, so that the clamping opening 15 and the through hole 16 can be used to install and protect the pressure transmitter body 1 without affecting the connection between the pressure transmitter body 1 and the external pipeline and the display of the measured value. At the same time, the heat dissipation holes 17 can be used to dissipate heat from the pressure transmitter body 1.

[0028] 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.

[0029] 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. An explosion-proof pressure transmitter, characterized in that: It comprises a pressure transmitter body (1) and a mounting base (2); A fixed base plate (4) is fixedly installed on the top of the mounting frame (2), and limited straight sliding grooves (5) are provided on both sides of the upper end surface of the fixed base plate (4). The rear top of the fixed base plate (4) is rotatably connected to a main rotating shaft (6) through a rotating shaft. The outer curved surface of the main rotating shaft (6) is fixedly installed with a first synchronous wheel (7) and a second synchronous wheel (8) in sequence from front to back. The outer ends of the first synchronous wheel (7) and the second synchronous wheel (8) are respectively connected to a third synchronous wheel (9) and a fourth synchronous wheel (10) through a synchronous belt transmission. A first transmission screw (11) and a second transmission screw (12) are fixedly installed in the middle of the third synchronous wheel (9) and the fourth synchronous wheel (10). The outer curved surfaces of both side ends of the first transmission screw (11) and the second transmission screw (12) are respectively threadedly connected to sliders (13), and an explosion-proof housing (14) for safety protection of the pressure transmitter body (1) is fixedly installed on the top of the slider (13); A clamping opening (15) is provided in the middle of the inner side of the explosion-proof shell (14), a through hole (16) is provided in the middle of the front end surface of the explosion-proof shell (14), and heat dissipation holes (17) are provided through the two side ends of the explosion-proof shell (14).

2. An explosion-proof pressure transmitter according to claim 1, characterized in that: The four corners of the lower end of the mounting base (2) are penetrated with fixing holes (3), and there are four fixing holes (3) which are symmetrically distributed at the four corners of the lower end of the mounting base (2), so that the mounting base (2) can be installed and fixed by means of the fixing holes (3) in conjunction with connecting bolts.

3. An explosion-proof pressure transmitter according to claim 2, characterized in that: The pressure transmitter body (1) is fixedly installed through the middle of the upper end of the fixed base plate (4), and there are two limiting straight sliding grooves (5), which are symmetrically distributed on both sides of the upper end surface of the fixed base plate (4).

4. An explosion-proof pressure transmitter according to claim 3, characterized in that: The front end outer curved surface of the main rotating shaft (6) is threadedly connected with a fastening nut for fastening and locking the main rotating shaft (6), and the outer top end of the main rotating shaft (6) is fixedly provided with a knob for rotating the main rotating shaft (6).

5. An explosion-proof pressure transmitter according to claim 4, characterized in that: The two side ends of the first transmission screw (11) and the second transmission screw (12) are rotatably connected to the two sides of the inner wall of the limiting straight sliding groove (5) via a rotating shaft, and the outer curved threads of the two side ends of the first transmission screw (11) and the second transmission screw (12) are oriented in opposite directions.

6. An explosion-proof pressure transmitter according to claim 5, characterized in that: There are four sliders (13), two of which form a group. The two groups of sliders (13) are symmetrically distributed on both sides of the first transmission screw (11) and the second transmission screw (12), and the outer sides of the sliders (13) are movably connected to the inner wall of the limiting straight slide groove (5).

7. An explosion-proof pressure transmitter according to claim 6, characterized in that: The lower end of the explosion-proof housing (14) is movably connected to the upper end surface of the fixed base plate (4).

8. An explosion-proof pressure transmitter according to claim 7, characterized in that: The pipeline parts at the upper and lower ends of the pressure transmitter body (1) are movably connected to the inner wall of the clamping opening (15), and the pipeline part at the front end of the pressure transmitter body (1) is movably connected to the inner wall of the through hole (16).

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