Explosion-proof transmitter

Abstract

The utility model discloses an explosion-proof transmitter in the technical field of transmitters, which comprises a connecting base, a pressure-relief explosion-proof assembly mounted on one side of the connecting base, a detection cylinder mounted on one side, far away from the pressure-relief explosion-proof assembly, of the connecting base, and a data display instrument mounted at one end of the detection cylinder. A sealing cover is further arranged at the end, away from the data display instrument, of the detection barrel, the pressure relief explosion-proof assembly comprises a pressure relief barrel, and a first flow guide pipe is connected between the pressure relief barrel and the connecting base. Through the designed pressure relief explosion-proof assembly, the situation that the detection barrel is broken due to abnormal fluid pressure can be effectively avoided, leakage of flammable and explosive fluid is prevented, and the detection efficiency is improved. Meanwhile, according to the design of the scheme, the risk that fluid leaks and possibly makes spark or arc contact with electrical equipment is considered, so that accidents such as explosion are avoided, the practicability and safety of the equipment in the technical field of transmitters are improved, and the reliability and stability of the equipment during treatment of flammable and explosive fluid can be guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of transmitter, especially to an explosion -proof transmitter. BACKGROUND

[0002] The transmitter is a kind of equipment that converts sensor signal into standard signal output, is widely used in industrial automation and process control field.It usually receives analog signal from sensor, such as temperature, pressure, flow, liquid level and so on Physical quantity, and it is converted into standard electric signal, such as 4-20mA, 0-10V etc., to be transmitted and further handled at long distance.The main functions of transmitter include signal amplification, signal conversion, signal isolation, signal processing etc.They can improve the anti-interference ability of signal, ensure the stability and accuracy of signal in long-distance transmission process.Transmitter is widely used in chemical industry, petroleum, electric power, water treatment, food processing and other industries, and is the key component for realizing process automation and optimization control.

[0003] At present, the existing transmitter has the risk of shell damage when the fluid pressure exceeds the safe range of the shell during use because the shell is not equipped with a special pressure relief explosion-proof protection structure, and the connection between the shell and the data display instrument lacks effective sealing filling structure, which may cause a slight gap between the data display instrument and the shell during operation, and once the external electrical equipment produces sparks or arcs during normal operation or failure, it may contact the flammable and explosive fluid circulating inside the transmitter through these gaps, thereby increasing the probability of explosion.Therefore, there is a certain safety hazard when using the transmitter.

[0004] Based on this, we propose an explosion-proof transmitter to solve the above-mentioned problems. CONTENT OF THE UTILITY MODEL

[0005] The purpose of this part is to outline some aspects of the embodiments of the utility model and briefly introduce some preferred embodiments.In this part and the abstract of the specification and the utility model name, some simplifications or omissions may be made to avoid obscuring the purpose of this part, the abstract of the specification and the utility model name, and such simplifications or omissions cannot be used to limit the scope of the utility model.

[0006] Therefore, the utility model aims to provide an explosion-proof transmitter, which can solve the problem of shell damage and increase the risk of explosion when the fluid pressure exceeds the standard due to the lack of pressure relief explosion-proof protection structure in the existing transmitter.

[0007] To solve the above technical problems, the utility model provides a kind of explosion -proof transmitter, using the following technical scheme: including connecting base, the one side of connecting base is equipped with pressure relief explosion -proof component, the one side of connecting base away from pressure relief explosion -proof component is equipped with detection cylinder, the one end of detection cylinder is equipped with data display instrument, the one end of detection cylinder away from data display instrument is also provided with sealing cover;

[0008] The pressure relief explosion -proof component includes a pressure relief cylinder, a first flow guide pipe is connected between the pressure relief cylinder and the connecting base, and a second flow guide pipe is also installed at one end of the pressure relief cylinder away from the first flow guide pipe.

[0009] A first circular valve core is installed at one end of the first flow guide pipe, a valve rod is connected to one side of the first circular valve core, a pressure relief top plate is installed at one end of the valve rod away from the first circular valve core, and a compression spring is also sleeved outside the valve rod and connected between the inside of the first circular valve core and the pressure relief top plate.

[0010] By using the above technical scheme, the safety and protection capability of the transmitter are improved by installing the pressure relief explosion -proof component on one side of the connecting base, which is composed of a pressure relief cylinder, a first flow guide pipe and a second flow guide pipe. When the pressure of the flammable and explosive fluid flowing inside the detection cylinder abnormally rises and exceeds the safe range it can withstand, the fluid will be guided into the first flow guide pipe, pushing the pressure relief top plate inside, and when the fluid pressure exceeds the elastic force of the compression spring, the first circular valve core will open and release the pressure under the action of the pressure relief top plate and the valve rod. At this time, the flammable and explosive fluid with abnormal pressure is discharged into the pressure relief cylinder, which not only plays a role in pressure relief but also temporarily stores the discharged fluid, preventing the detection cylinder from breaking due to excessive pressure.

[0011] When the fluid pressure inside the detection cylinder continues to rise and exceeds the bearing force of the tension spring, the second circular valve core installed at one end of the tension spring can be easily pushed outwards, and the fluid flows into the second flow guide pipe through the gap between the second circular valve core and the annular valve plate. Since the second flow guide pipe is connected to a sealed storage container at the end, the large-volume container can collect and store these fluids with abnormal pressure, further ensuring the safe operation of the system. As can be seen from the above, the pressure relief explosion -proof component designed in this scheme can effectively prevent the detection cylinder from breaking due to abnormal fluid pressure, prevent flammable and explosive fluid leakage, and at the same time, the design takes into account the risk of fluid leakage and electrical equipment sparking or arcing contact, thereby avoiding accidents such as explosion, which improves the practicality and safety of the equipment in the transmitter technology field and helps to ensure the reliability and stability of the equipment when handling flammable and explosive fluids.

[0012] Optionally, the pressure relief cylinder is connected with a tension spring away from the inner end of the second flow guide pipe, the tension of the tension spring is greater than the elastic force of the compression spring, one end of the tension spring is installed with a second circular valve core, the outer side of the end of the pressure relief cylinder close to the second circular valve core is provided with an annular valve plate, and a drainage channel is further arranged between the end of the pressure relief cylinder and the second flow guide pipe.

[0013] By adopting the technical scheme, when the pressure of the fluid flowing in the detection cylinder continuously abnormally increases, and the pressure of the fluid is greater than the tension of the tension spring, the second circular valve core added at one end of the tension spring can be easily pushed outward, the fluid can flow into the second flow guide pipe from the gap between the second circular valve core and the annular valve plate, the excess fluid pressure is effectively discharged, and the sealing performance of the second circular valve core is enhanced by the annular valve plate, so that the fluid cannot leak in the normal working state.

[0014] Optionally, the annular valve plate and the second circular valve core are matched in structure, and the annular valve plate and the second circular valve core are in transition fit.

[0015] By adopting the technical scheme, the second circular valve core can be fully attached to the annular valve plate in the closed state by the structure design that the annular valve plate and the second circular valve core are in transition fit, so that the leakage of the fluid when the second circular valve core is not opened is avoided, and the overall sealing performance of the transmitter is effectively improved.

[0016] Optionally, the top of the detection cylinder is connected with a connecting pipe on both sides, both ends of the detection cylinder away from the connecting pipe are provided with a detection opening, the outer side of the detection cylinder close to the detection opening is installed with a sealing rubber ring, and a double-sided threaded groove is further arranged between the sealing rubber ring and the detection opening.

[0017] By adopting the technical scheme, the sealing rubber ring and the double-sided threaded groove added at both ends of the detection cylinder can not only connect and fix the cover and the sealing cover at both ends of the detection cylinder, but also improve the sealing performance of the connection between the cover, the sealing cover and the detection cylinder.

[0018] Optionally, the data display instrument comprises a cover, the inner side of the cover and the sealing cover is installed with a connecting rod, and one end of the connecting rod is further provided with a detection probe.

[0019] By adopting the technical scheme, the detection probe added at one end of the connecting rod can directly contact with the fluid flowing in the detection cylinder, so that the detection probe can obtain the physical properties of the fluid in real time, such as temperature, pressure or flow rate, and feed back these data to the data display instrument.

[0020] Optionally, the detection probe is matched with the detection port structure, and the detection probe is in plug-in cooperation with the detection port.

[0021] By adopting the technical scheme, the plug-in cooperation structure between the detection probe and the detection port is designed, the structure matching ensures that the detection probe can be stably and accurately inserted into the inside of the detection cylinder, and the detection probe can directly contact the to-be-detected fluid flowing in the inside of the detection cylinder.

[0022] Optionally, annular sealing grooves are arranged around one side of the cover close to the connecting rod, and double-sided thread rings are further connected between the annular sealing grooves and the connecting rod.

[0023] By adopting the technical scheme, the annular sealing grooves and the double-sided thread rings arranged on one side of the cover and the sealing cover can not only connect and fix the cover and the sealing cover at the two ends of the detection cylinder, but also improve the sealing performance of the connection between the cover and the sealing cover and the detection cylinder.

[0024] Optionally, the annular sealing grooves and the sealing rubber ring are in transition cooperation, and the double-sided thread ring and the double-sided thread groove are in threaded cooperation.

[0025] By adopting the technical scheme, the transition cooperation structure between the annular sealing grooves and the sealing rubber ring ensures effective sealing at the connection, significantly reduces the fluid leakage risk caused by the gap, the cooperation mode can adapt to the changes of temperature and pressure, prevents external sparks or arcs from contacting the flammable fluid in the inside of the transmitter through the gap, thereby reducing the probability of causing explosion, the threaded cooperation structure between the double-sided thread ring and the double-sided thread groove provides strong connection, ensures the close combination between the cover and the sealing cover, and the stable connection improves the pressure resistance of the overall structure, so that the fluid is not easy to leak in normal operation or in case of failure.

[0026] In summary, the utility model has at least one of the following beneficial effects:

[0027] 1, this scheme is installed in one side of the connecting base pressure relief explosion-proof assembly, to improve the safety and protection ability of the transmitter, wherein the pressure relief explosion-proof assembly is composed of pressure relief cylinder, first flow guide pipe and second flow guide pipe, when the flammable and explosive fluid flowing in the inside of the detection cylinder abnormally rises and exceeds the safe range of bearing, the fluid is guided to the inside of the first flow guide pipe, pushes the pressure relief top plate in the inside, when the fluid pressure exceeds the elastic force of the compression spring, the first circular valve core is opened under the action of the pressure relief top plate and the valve rod and releases the pressure, at this time, the flammable and explosive fluid with abnormal pressure is discharged into the pressure relief cylinder, the pressure relief cylinder not only can play a role of pressure relief, but also can temporarily store the discharged fluid, so as to prevent the detection cylinder from being broken due to excessive pressure.

[0028] 2、When the fluid pressure inside the detection cylinder continues to rise and exceeds the bearing force of the tension spring, the second circular valve core added at one end of the tension spring can be easily pushed outward, and the fluid flows into the second flow guide pipe through the gap between the second circular valve core and the annular valve plate. Since the second flow guide pipe is connected with a sealed storage container, the large volume container can collect and store these pressure abnormal fluids, further ensuring the safe operation of the system. As can be seen from the above, the pressure relief and explosion-proof assembly designed in the scheme can effectively prevent the detection cylinder from being broken due to abnormal fluid pressure, prevent the leakage of flammable and explosive fluids, and at the same time, the scheme takes into account the risk that the fluid leakage may come into contact with the spark or arc of the electrical equipment, thereby avoiding accidents such as explosion. This design improves the practicality and safety of the equipment in the transmitter technology field, and helps to ensure the reliability and stability of the equipment when handling flammable and explosive fluids. BRIEF DESCRIPTION OF DRAWINGS

[0029] In order to more clearly illustrate the technical scheme of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiment description. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0030] Figure 1 It is a schematic diagram of the overall structure of the present application;

[0031] Figure 2 It is a schematic diagram of the connection base of the present application;

[0032] Figure 3 It is a schematic diagram of the pressure relief and explosion-proof assembly structure of the present application;

[0033] Figure 4 It is a schematic diagram of the first flow guide pipe plane structure of the present application;

[0034] Figure 5 It is a schematic diagram of the detection cylinder structure of the present application;

[0035] Figure 6 It is a schematic diagram of the cover structure of the present application.

[0036] Explanation of reference signs:

[0037] 1, connection base;

[0038] 2, pressure relief and explosion-proof assembly;

[0039] 21, pressure relief cylinder; 211, tension spring; 212, second circular valve core; 213, annular valve plate; 214, exhaust passage;

[0040] 22, first flow guide pipe; 221, first circular valve core; 222, valve rod; 223, pressure relief top plate; 224, compression spring;

[0041] 23, second flow guide pipe;

[0042] 3, detection cylinder;

[0043] 31, connecting pipe; 32, detection opening; 33, sealing rubber ring; 34, double-sided thread groove;

[0044] 4, data display instrument;

[0045] 41, cover; 411, annular sealing groove; 412, double-sided thread ring;

[0046] 42, connecting rod; 43, detection probe;

[0047] 5, sealing cover. DETAILED DESCRIPTION

[0048] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0049] Embodiment: refer to Figures 1 to 6 The utility model provides an embodiment, a kind of explosion-proof transmitter, including connecting base 1, the side of connecting base 1 is equipped with pressure relief explosion-proof component 2, pressure relief explosion-proof component 2 includes pressure relief cylinder 21, first flow guide pipe 22 is connected between pressure relief cylinder 21 and connecting base 1, the end of pressure relief cylinder 21 away from first flow guide pipe 22 is also equipped with second flow guide pipe 23, the inside one end of first flow guide pipe 22 is equipped with first circular valve core 221, the side of first circular valve core 221 is connected with valve rod 222, the end of valve rod 222 away from first circular valve core 221 is equipped with pressure relief top plate 223, the outside of valve rod 222 is also equipped with compression spring 224, compression spring 224 is connected between the inside of first circular valve core 221 and pressure relief top plate 223.

[0050] The one end of the pressure relief cylinder 21 away from the inside of the second flow guide pipe 23 is connected with a tension spring 211, one end of the tension spring 211 is installed with a second circular valve core 212, the one end of the pressure relief cylinder 21 close to the second circular valve core 212 is provided with an annular valve plate 213 around, the one end of the pressure relief cylinder 21 and the second flow guide pipe 23 is also penetrated with a drainage channel 214, the design of the pressure relief cylinder 21 is crucial, when the pressure of the fluid circulating in the detection cylinder 3 inside continuously appears the case of abnormal increase, and the pressure of the fluid is greater than the tension of the tension spring 211, the second circular valve core 212 added at one end of the tension spring 211 can be easily opened outward, the fluid can flow into the second flow guide pipe 23 from the gap between the second circular valve core 212 and the annular valve plate 213, effectively discharge excess fluid pressure, through the structure matching of the annular valve plate 213 and the second circular valve core 212, the transition fit between the annular valve plate 213 and the second circular valve core 212, through the structure design of the transition fit between the annular valve plate 213 and the second circular valve core 212, the second circular valve core 212 can fully adhere to the annular valve plate 213 in the closed state, avoid the leakage of the fluid when the second circular valve core 212 is not opened, effectively improve the overall sealing of the transmitter.

[0051] The one end of the pressure relief cylinder 21 away from the inside of the second flow guide pipe 23 is connected with a tension spring 211, one end of the tension spring 211 is installed with a second circular valve core 212, the one end of the pressure relief cylinder 21 close to the second circular valve core 212 is provided with an annular valve plate 213 around, the one end of the pressure relief cylinder 21 and the second flow guide pipe 23 is also penetrated with a drainage channel 214, the design of the pressure relief cylinder 21 is crucial, when the pressure of the fluid circulating in the detection cylinder 3 inside continuously appears the case of abnormal increase, and the pressure of the fluid is greater than the tension of the tension spring 211, the second circular valve core 212 added at one end of the tension spring 211 can be easily opened outward, the fluid can flow into the second flow guide pipe 23 from the gap between the second circular valve core 212 and the annular valve plate 213, effectively discharge excess fluid pressure, through the structure matching of the annular valve plate 213 and the second circular valve core 212, the transition fit between the annular valve plate 213 and the second circular valve core 212, through the structure design of the transition fit between the annular valve plate 213 and the second circular valve core 212, the second circular valve core 212 can fully adhere to the annular valve plate 213 in the closed state, avoid the leakage of the fluid when the second circular valve core 212 is not opened, effectively improve the overall sealing of the transmitter.

[0052] The detection probe 43 is matched with the detection port 32, and the detection probe 43 is matched with the detection port 32 in a plug-in manner. Through the structure design of the plug-in matching between the detection probe 43 and the detection port 32, the structure matching ensures that the detection probe 43 can be stably and accurately inserted into the inside of the detection cylinder 3, so that the detection probe 43 can directly contact the fluid to be detected flowing in the inside of the detection cylinder 3. The cover 41 and the sealing cover 5 are provided with an annular sealing groove 411 around one side of the connecting rod 42, and a double-thread ring 412 is further connected between the annular sealing groove 411 and the connecting rod 42. Through the annular sealing groove 411 and the double-thread ring 412 installed on one side of the cover 41 and the sealing cover 5, the cover 41 and the sealing cover 5 can be connected and fixed at both ends of the detection cylinder 3, and the sealing property of the connection between the cover 41 and the sealing cover 5 and the detection cylinder 3 can be improved.

[0053] The annular sealing groove 411 and the sealing rubber ring 33 are in a transition fit, and the double-thread ring 412 and the double-thread groove 34 are in a threaded fit. Through the structure design of the transition fit between the annular sealing groove 411 and the sealing rubber ring 33, effective sealing is ensured at the connection, and the risk of fluid leakage caused by gaps is significantly reduced. This matching mode can adapt to changes in temperature and pressure, prevent external sparks or arcs from contacting the flammable fluid in the transmitter through the gap, thereby reducing the probability of causing an explosion. The threaded fit between the double-thread ring 412 and the double-thread groove 34 provides strong connection and ensures the close combination between the cover 41 and the sealing cover 5. This stable connection not only improves the pressure resistance of the overall structure, but also prevents fluid leakage during normal operation or failure.

[0054] Working principle: the pressure relief explosion-proof assembly 2 is installed on one side of the connecting base 1, and the pressure relief explosion-proof assembly 2 is composed of a pressure relief cylinder 21, a first flow guide pipe 22 and a second flow guide pipe 23. When the pressure of the flammable and explosive fluid flowing in the detection cylinder 3 is abnormal and exceeds the safe range that the detection cylinder 3 can withstand, the fluid can flow from the detection cylinder 3 into the inside of the first flow guide pipe 22, and the fluid can cause the pressure on the pressure relief top plate 223 installed inside the first flow guide pipe 22. When the pressure of the fluid is greater than the compression spring 224, the first circular valve core 221 can be opened under the action of the pressure relief top plate 223 and the valve rod 222. At this time, the flammable and explosive fluid with abnormal pressure is discharged into the inside of the pressure relief cylinder 21. The pressure relief cylinder 21 can play a pressure relief role for the detection cylinder 3, and can also temporarily store the discharged flammable and explosive fluid.

[0055] When the pressure of the flammable and explosive fluid flowing in the detection cylinder 3 continuously abnormally increases, and the pressure of the fluid is greater than the tension of the tension spring 211, the second circular valve core 212 added at one end of the tension spring 211 can be easily pushed outward, and the fluid can flow into the second flow guide pipe 23 from the gap between the second circular valve core 212 and the annular valve plate 213. The end of the second flow guide pipe 23 is sealingly connected to a storage container with a large volume, which can collect and store the flammable and explosive fluid with abnormal pressure. As known from the above, the transmitter designed in the scheme can prevent the pressure of the fluid flowing in the detection cylinder 3 from being abnormal, so as to prevent the detection cylinder 3 from being broken. In addition, the transmitter can also prevent the detection cylinder 3 from being broken due to insufficient bearing force, so as to prevent the leakage of flammable and explosive fluid. Furthermore, the transmitter can avoid the explosion caused by the contact between the leaked flammable and explosive fluid and the spark or electric arc of the electrical equipment, thereby improving the practicability and safety of the equipment in the field of transmitter technology.

[0056] Finally, it should be noted that: the above only for the preferred embodiments of the present application, and not for limiting the present application, although the present application has been described in detail with reference to the foregoing embodiments, for those skilled in the art, it still can modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part of the technical features, all within the spirit and principles of the present application.

Claims

1. An intrinsically safe transmitter comprising a base (1) characterised in that: One side of the connecting base (1) is provided with a pressure relief explosion-proof assembly (2), and the side of the connecting base (1) away from the pressure relief explosion-proof assembly (2) is provided with a detection cylinder (3), one end of the detection cylinder (3) is provided with a data display instrument (4), and the end of the detection cylinder (3) away from the data display instrument (4) is further provided with a sealing cover (5). The pressure relief explosion-proof assembly (2) comprises a pressure relief cylinder (21), and a first flow guide pipe (22) is connected between the pressure relief cylinder (21) and the connecting base (1); and a second flow guide pipe (23) is further arranged at the end of the pressure relief cylinder (21) away from the first flow guide pipe (22). The first flow guide pipe (22) is internally provided with a first circular valve core (221) at one end, the first circular valve core (221) is connected with a valve rod (222) at one side, the valve rod (222) is provided with a pressure relief top plate (223) at the end away from the first circular valve core (221), and the valve rod (222) is further sleeved with a compression spring (224) at the outside, and the compression spring (224) is connected between the inside of the first circular valve core (221) and the pressure relief top plate (223).

2. The explosion-proof transmitter of claim 1, wherein: The end of the pressure relief cylinder (21) away from the second flow guide pipe (23) is internally connected with a tension spring (211), the tension of the tension spring (211) is greater than the elasticity of the compression spring (224), one end of the tension spring (211) is provided with a second circular valve core (212), and the end of the pressure relief cylinder (21) close to the second circular valve core (212) is provided with an annular valve plate (213) around, and a drainage channel (214) is further arranged between the end of the pressure relief cylinder (21) and the second flow guide pipe (23).

3. The explosion-proof transmitter of claim 2, wherein: The annular valve plate (213) and the second circular valve core (212) are matched in structure, and the annular valve plate (213) and the second circular valve core (212) are in transition fit.

4. The explosion-proof transmitter of claim 3, wherein: The top of the detection cylinder (3) is connected with a connecting pipe (31) at both sides, both ends of the detection cylinder (3) away from the connecting pipe (31) are provided with a detection opening (32), and the outer side of the detection cylinder (3) close to the detection opening (32) is provided with a sealing rubber ring (33); and a double-sided thread groove (34) is further arranged between the sealing rubber ring (33) and the detection opening (32).

5. The explosion-proof transmitter of claim 4, wherein: The data display instrument (4) comprises a watch cover (41), the watch cover (41) and the inner side of the sealing cover (5) are provided with a connecting rod (42), and one end of the connecting rod (42) is further provided with a detection probe (43).

6. The explosion-proof transmitter of claim 5, wherein: The detection probe (43) and the detection opening (32) are matched in structure, and the detection probe (43) and the detection opening (32) are in plug-in fit.

7. The explosion-proof transmitter of claim 6, wherein: The side of the watch cover (41) and the sealing cover (5) close to the connecting rod (42) is provided with an annular sealing groove (411) around, and a double-sided thread ring (412) is further arranged between the annular sealing groove (411) and the connecting rod (42).

8. The explosion-proof transmitter of claim 7, wherein: The annular sealing groove (411) is in transition fit with the sealing rubber ring (33), and the double-sided threaded ring (412) is in threaded fit with the double-sided threaded groove (34).

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