Explosion-proof pressure transmitter

Abstract

The utility model discloses an explosion-proof pressure transmitter which comprises a pressure transmitter body, a connecting piece fixedly connected to the bottom of the pressure transmitter body and an injection pipe fixedly connected to the surface of a fluid pipeline, and the pressure transmitter body is detachably connected with the injection pipe through the connecting piece. The connecting piece comprises a connecting pipe fixedly connected with the bottom of the pressure transmitter body, the bottom end of the connecting pipe is fixedly connected with an annular connecting disc, the top end of the injection pipe is fixedly connected with a groove-shaped connecting base, the connecting disc is matched with the connecting base, and the bottom end of the connecting disc is fixedly connected with a limiting column. Limiting holes matched with the limiting columns are formed in the inner bottom wall of the connecting base. By arranging the limiting columns and the limiting holes, the connecting disc and the connecting base can be in butt joint rapidly and accurately, installation is convenient, the connecting disc and the connecting base can be fixed conveniently by arranging the threaded sections and the nuts, and compared with structures such as tooth blocks and tooth grooves in the prior art, the manufacturing process is simple, and cost is saved.

Description

Technical Field

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

[0002] A pressure transmitter is a device used to measure and convert pressure signals. It converts the pressure of a medium (such as gas or liquid) into a corresponding electrical signal output, usually a standard signal (such as 4-20mA) or a digital signal, for monitoring, control and data acquisition. In a hazardous environment, if the pressure transmitter is not explosion-proof, when sparks or arcs appear inside it, it may cause an explosion of surrounding flammable gases, steam or dust. Therefore, by adopting measures such as explosion-proof housing, explosion-proof connection and explosion-proof circuit to prevent the pressure transmitter from generating sparks or arcs, and ensure its safe operation in a hazardous environment, so as to avoid causing an explosion or fire in the outside world, this pressure transmitter is called an explosion-proof pressure transmitter.

[0003] After searching, a Chinese patent with the authorization number CN 220322615 U discloses an explosion-proof pressure transmitter that is easy to install. By setting an auxiliary mechanism, the connecting shaft is vertically inserted into the inside of the T-shaped pipe butt end, and the tooth block is engaged with the tooth groove, so that the connecting shaft passes through the tooth block and vertically downward along the track of the tooth groove, and the plug block is engaged in the slot, so that the corresponding bolt holes, plug blocks, and slots are located on the same horizontal line, so that the corresponding bolt holes between the first flange and the second flange are aligned, so as to achieve the effect of easy installation. However, the device adopts structures such as tooth blocks and tooth grooves, and is relatively complicated in manufacturing process. Therefore, an explosion-proof pressure transmitter is proposed to solve the above problems. Utility Model Content

[0004] The purpose of the utility model is to provide an explosion-proof pressure transmitter to solve the problems raised in the above background technology.

[0005] The present application embodiment adopts the following technical solutions:

[0006] A explosion-proof pressure transmitter comprises a pressure transmitter body, a connecting piece fixedly connected to the bottom of the pressure transmitter body, and an injection tube fixedly connected to the surface of a fluid pipeline, wherein the pressure transmitter body is detachably connected to the injection tube via the connecting piece, wherein the connecting piece comprises a connecting tube fixedly connected to the bottom of the pressure transmitter body, wherein the bottom end of the connecting tube is fixedly connected to a ring-shaped connecting disk, wherein the top end of the injection tube is fixedly connected to a groove-shaped connecting seat, wherein the connecting disk is matched with the connecting seat, wherein the bottom end of the connecting disk is fixedly connected to a limiting column, wherein the inner bottom wall of the connecting seat is provided with a limiting hole matched with the limiting column.

[0007] Preferably, the surface of the limiting column is provided with limiting segments and threaded segments in sequence from near to far starting from the lower surface of the connecting disk, the limiting segments are adapted to the limiting holes, and the length of the limiting segments is consistent with the depth of the limiting holes.

[0008] Preferably, the threaded section passes through the limiting hole and extends to the outside of the connecting plate, and a nut is threadedly connected to the surface of the threaded section, and two nuts are arranged on the surface of each limiting column.

[0009] Preferably, a fixed block is fixedly connected to the inner wall of the connecting pipe, a water outlet and a return port are respectively provided on the surface of the connecting pipe from bottom to top, a filter element is fixedly connected to the surface of the connecting pipe corresponding to the water outlet, a return pipe is fixedly connected to the surface of the filter element, and an end of the return pipe away from the filter element is fixedly connected to the position of the connecting pipe surface corresponding to the return port.

[0010] Preferably, an angle is formed between the filter element and the connecting pipe, and the angle is less than 90 degrees.

[0011] Preferably, the filter element comprises an outer tube fixedly connected to the surface of the connecting tube, a cylindrical filter screen with one end open is arranged inside the outer tube, the surface of the cylindrical filter screen is in contact with the inner wall of the outer tube, and the open end of the cylindrical filter screen is close to the water outlet.

[0012] Preferably, a screw cap is detachably connected to the surface of the outer tube.

[0013] At least one of the above technical solutions adopted in the embodiments of the present application can achieve the following beneficial effects:

[0014] Firstly, in the utility model, by setting the limiting column and the limiting hole, the connecting disk and the connecting seat can be quickly and accurately connected, which is convenient for installation. By setting the threaded section and the nut, the connecting disk and the connecting seat can be conveniently fixed. By setting two nuts, loosening can be prevented. Compared with the prior art using structures such as tooth blocks and tooth grooves, the manufacturing process is simple and cost is saved.

[0015] Secondly, in the utility model, by arranging an outer tube and a fixed block, the fluid can be introduced into the cylindrical filter cartridge, and the fluid is filtered by the cylindrical filter cartridge. The fluid after impurities removal flows through the reflux pipe to the upper part of the fixed block in the connecting pipe and enters the pressure transmitter body, which can reduce the adverse effects of impurities on the pressure transmitter body. By arranging the filter element at an angle, impurities can fall to the bottom of the cylindrical filter screen to prevent the top from being blocked and affecting the circulation. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0017] Figure 1 : A three-dimensional structural schematic diagram of the utility model;

[0018] Figure 2 The figure is a schematic diagram of the exploded structure of the connecting piece and the connecting seat of the utility model;

[0019] Figure 3 The three-dimensional structure diagram of the limit column of the utility model is as follows;

[0020] Figure 4 The figure is: a schematic diagram of the explosion structure of the filter element of the utility model;

[0021] Figure 5 Schematic diagram of the cross-sectional structure of the connecting pipe, the outer pipe and the return pipe of the utility model.

[0022] In the figure: 1. Pressure transmitter body; 2. Connecting piece; 201. Connecting pipe; 202. Connecting plate; 203. Limiting column; 2031. Limiting section; 2032. Threaded section; 3. Fluid pipeline; 4. Injection pipe; 5. Connecting seat; 6. Limiting hole; 7. Nut; 8. Fixing block; 9. Filter element; 901. Outer tube; 902. Cylindrical filter screen; 903. Screw cap; 10. Reflux pipe. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and advantages of the present application clearer, the technical solution of the present application will be clearly and completely described below in combination with the specific embodiments of the present application and the corresponding drawings. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present application.

[0024] The technical solutions provided by various embodiments of the present application are described in detail below in conjunction with the accompanying drawings.

[0025] See also Figure 1-5 , the utility model provides a technical solution for an explosion-proof pressure transmitter:

[0026] A kind of explosion-proof pressure transmitter comprises a pressure transmitter body 1, a connecting piece 2 fixedly connected to the bottom of the pressure transmitter body 1 and an injection pipe 4 fixedly connected to the surface of a fluid pipeline 3, the pressure transmitter body 1 is detachably connected to the injection pipe 4 through the connecting piece 2, the connecting piece 2 comprises a connecting pipe 201 fixedly connected to the bottom of the pressure transmitter body 1, the bottom end of the connecting pipe 201 is fixedly connected to a ring-shaped connecting disk 202, the top end of the injection pipe 4 is fixedly connected to a groove-shaped connecting seat 5, the connecting disk 202 is adapted to the connecting seat 5, the bottom end of the connecting disk 202 is fixedly connected to a limiting column 203, and the inner bottom wall of the connecting seat 5 is provided with a limiting hole 6 adapted to the limiting column 203.

[0027] Specifically, by setting the limit column 203 and the limit hole 6, the connecting disk 202 can be quickly and accurately connected to the connecting seat 5, which is convenient for installation. Compared with the tooth block, tooth groove and other structures used in the prior art, the manufacturing process is simple and cost is saved. The pressure transmitter body 1 adopts an explosion-proof casing, explosion-proof connection and explosion-proof circuit design to ensure its safe operation in dangerous environments.

[0028] The surface of the limiting column 203 is provided with a limiting section 2031 and a threaded section 2032 in sequence from near to far with the lower surface of the connecting disk 202 as the starting point. The limiting section 2031 is adapted to the limiting hole 6, and the length of the limiting section 2031 is consistent with the depth of the limiting hole 6. By providing the limiting section 2031 and making it adapted to the limiting hole 6, the connecting disk 202 can be limited to avoid the connection disk 202 and the connecting seat 5 being offset due to the vibration generated by the passage of the fluid, thereby causing a poor seal. In addition, during actual installation, a sealing gasket is added between the connecting disk 202 and the connecting seat 5 to improve its sealing performance.

[0029] The threaded section 2032 passes through the limiting hole 6 and extends to the outside of the connecting disk 202, and the surface of the threaded section 2032 is threadedly connected with a nut 7. Two nuts 7 are arranged on the surface of each limiting column 203. By arranging the threaded section 2032 and the nut 7, it is convenient to fix the connecting disk 202 to the connecting seat 5. By arranging two nuts 7, loosening can be prevented.

[0030] A fixing block 8 is fixedly connected to the inner wall of the connecting tube 201, and a water outlet and a reflux port are respectively provided on the surface of the connecting tube 201 from bottom to top, a filter element 9 is fixedly connected to the surface of the connecting tube 201 corresponding to the water outlet, a reflux pipe 10 is fixedly connected to the surface of the filter element 9, and one end of the reflux pipe 10 away from the filter element 9 is fixedly connected to the surface of the connecting tube 201 corresponding to the reflux port. By setting the fixing block 8, the fluid can be introduced into the filter element 9 and, after being filtered, can flow through the reflux pipe 10 to the upper part of the fixed block 8 in the connecting tube 201 and enter the pressure transmitter body 1, thereby reducing the adverse effects of impurities on the pressure transmitter body 1.

[0031] An angle is formed between the filter element 9 and the connecting pipe 201, and the angle is less than 90 degrees. By tilting the filter element 9, impurities can fall to the bottom of the filter element 9, preventing the top of the filter element 9 from being blocked and affecting the flow.

[0032] The filter element 9 includes an outer tube 901 fixedly connected to the surface of the connecting tube 201, and a cylindrical filter screen 902 with one end open is arranged inside the outer tube 901. The surface of the cylindrical filter screen 902 is in contact with the inner wall of the outer tube 901, and the open end of the cylindrical filter screen 902 is close to the water outlet. By setting the cylindrical filter screen 902, the fluid enters the cylindrical filter screen 902 through its opening and flows from the top thereof to the return pipe 10, thereby playing a filtering role.

[0033] The surface of the outer tube 901 is detachably connected with a screw cap 903 , and the screw cap 903 is provided to facilitate taking out the cylindrical filter screen 902 for cleaning.

[0034] Working principle: When the explosion-proof pressure transmitter is used, the user first aligns the limiting column 203 with the limiting hole 6 and inserts it so that the connecting disk 202 enters the connecting seat 5. At this time, the threaded section 2032 is located outside the connecting seat 5. Then the nut 7 is screwed into the threaded section 2032 to install the variable pressure transmitter and the injection pipe 4. The connecting disk 202 and the connecting seat 5 can be quickly and accurately docked, which is convenient for installation. During operation, when the fluid flows, under the action of the outer tube 901 and the fixed block 8, the fluid is introduced into the cylindrical filter cartridge, and the cylindrical filter cartridge filters the fluid. The impurity-removed fluid flows through the reflux pipe 10 to the upper part of the fixed block 8 in the connecting pipe 201 and enters the pressure transmitter body 1, which can reduce the adverse effects of impurities on the pressure transmitter body 1. The filter element 9 is tilted to allow impurities to fall on the bottom of the cylindrical filter screen 902 to prevent its top from being blocked and affecting the circulation. Compared with the tooth block, tooth groove and other structures used in the prior art, the manufacturing process is simple and cost-saving.

[0035] It should also be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, commodity 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, commodity or device. In the absence of more restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the process, method, commodity or device including the elements.

[0036] The above is only an embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

Claims

1. An explosion-proof pressure transmitter, comprising a pressure transmitter body (1), a connecting piece (2) fixedly connected to the bottom of the pressure transmitter body (1), and an injection pipe (4) fixedly connected to the surface of a fluid pipeline (3), wherein the pressure transmitter body (1) is detachably connected to the injection pipe (4) via the connecting piece (2), and characterized in that: The connecting member (2) comprises a connecting pipe (201) fixedly connected to the bottom of the pressure transmitter body (1); the bottom end of the connecting pipe (201) is fixedly connected to a ring-shaped connecting disk (202); the top end of the injection pipe (4) is fixedly connected to a groove-shaped connecting seat (5); the connecting disk (202) is matched with the connecting seat (5); the bottom end of the connecting disk (202) is fixedly connected to a limiting column (203); and the inner bottom wall of the connecting seat (5) is provided with a limiting hole (6) matched with the limiting column (203).

2. An explosion-proof pressure transmitter according to claim 1, characterized in that: The surface of the limiting column (203) is provided with a limiting segment (2031) and a threaded segment (2032) in sequence from near to far, starting from the lower surface of the connecting plate (202); the limiting segment (2031) is adapted to the limiting hole (6), and the length of the limiting segment (2031) is consistent with the depth of the limiting hole (6).

3. An explosion-proof pressure transmitter according to claim 2, characterized in that: The threaded section (2032) passes through the limiting hole (6) and extends to the outside of the connecting plate (202), and a nut (7) is threadedly connected to the surface of the threaded section (2032), and two nuts (7) are arranged on the surface of each limiting column (203).

4. The explosion-proof pressure transmitter according to claim 1, characterized in that: A fixing block (8) is fixedly connected to the inner wall of the connecting pipe (201); a water outlet and a return port are respectively provided on the surface of the connecting pipe (201) from bottom to top; a filter element (9) is fixedly connected to a position on the surface of the connecting pipe (201) corresponding to the water outlet; a return pipe (10) is fixedly connected to the surface of the filter element (9); an end of the return pipe (10) away from the filter element (9) is fixedly connected to a position on the surface of the connecting pipe (201) corresponding to the return port.

5. The explosion-proof pressure transmitter according to claim 4, characterized in that: An included angle is formed between the filter element (9) and the connecting pipe (201), and the included angle is less than 90 degrees.

6. An explosion-proof pressure transmitter according to claim 4, characterized in that: The filter element (9) comprises an outer tube (901) fixedly connected to the surface of the connecting tube (201); a cylindrical filter screen (902) with one end open is arranged inside the outer tube (901); the surface of the cylindrical filter screen (902) is in contact with the inner wall of the outer tube (901); and the open end of the cylindrical filter screen (902) is close to the water outlet.

7. An explosion-proof pressure transmitter according to claim 6, characterized in that: The surface of the outer tube (901) is detachably connected with a screw cap (903).

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