An explosion-proof dynamic liquid level testing device

Abstract

The invention relates to the technical field of oil well dynamic liquid level measurement, in particular to an explosion-proof dynamic liquid level test device, which comprises: a liquid level measurement component, comprising a casing, a conical well cover and a liquid level meter, a pressure relief component, comprising an air pipe, a protective shell, a gas tank, a microphone, a pressure relief ring, a fixed shell, a push column and a mounting shell arranged at the upper end of the pressure relief ring, and an early warning component; a combination of mechanical and sensor measurement is adopted to increase safety protection, when the internal sensor is damaged and cannot test the accurate value in time, the height of the internal liquid level can be visually checked through a float, and through the pressure relief component, when the pressure inside the oil well suddenly increases, the pressure can be released to the outside through the movement of the internal blocking shell and the push column, so as to relieve the high pressure in the air pipe, and at the same time the early warning component will also emit a warning sound to remind the staff, thereby improving the safety of the device.

Description

Technical Field

[0001] The invention relates to the technical field of oil well dynamic liquid level measurement, in particular to an explosion-proof dynamic liquid level testing device. Background Art

[0002] In the process of oil well exploration and development, accurate testing of dynamic liquid level is crucial to assessing oil well productivity, optimizing mining strategies, and ensuring safe production. However, traditional oil well dynamic liquid level testing devices have serious safety hazards when facing harsh environments such as explosive and flammable environments. Especially in high-pressure and high-temperature oil well environments, due to the extreme environment in the oil well, such as high temperature, high pressure, high humidity and other environmental influences, these conditions may damage electronic sensors or affect their accuracy. The test equipment cannot withstand extreme working conditions, resulting in unstable performance and easily causing safety accidents.

[0003] The Chinese patent with publication number CN106837306A discloses an integrated oil well dynamic liquid level measurement device and method. The device is safe and reliable by adopting an explosion-proof shell; by setting a casing solenoid valve, the oil well casing can be blocked and the pressure can be released. At the same time, when it is not necessary to measure the dynamic liquid level of the oil well, the microcontroller controls the casing solenoid valve to ensure that the space between the oil pipe and the oil well casing is open; by processing the gas storage bin and the test pipe into one, and setting the gas storage bin close to the sound wave receiving air pipe, the volume of the measuring device is reduced, the distance of the high-pressure gas flowing is reduced, and the sound wave receiving air pipe is reduced. The wave transmitting air pipe is arranged in the sound wave receiving air pipe to facilitate the measurement of the emission and reception of infrasound waves; the internal or external explosion working mode is realized by the cooperation of the casing solenoid valve and the explosion solenoid valve to measure the dynamic liquid level position; under the temperature environment that meets the normal operation of the measuring device, the pressure sensor is used to detect the pressure value in the oil well casing; when the pressure value in the oil well casing is lower than the pressure threshold stored in the memory, the external explosion working mode is used to measure the dynamic liquid level position; when the pressure value in the oil well casing is not lower than the pressure threshold stored in the memory, the internal explosion working mode is used to measure the dynamic liquid level position.

[0004] However, this technical solution still has some problems: once the sensor is damaged by the environment in the oil well and is not discovered in time, it may lead to the inability to measure data in a timely and accurate manner, which may easily leave safety hazards. In addition, the pressure in the oil well fluctuates due to environmental factors. Once the pressure suddenly rises, it is easy to cause damage to the test equipment if the pressure cannot be handled in time. Summary of the invention

[0005] In view of the above problems in the prior art, the present invention is proposed.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: an explosion-proof dynamic liquid level test device, comprising: a liquid level measurement assembly, comprising a casing, a conical manhole cover arranged at the upper end of the casing, and a liquid level meter arranged at the upper end of the conical manhole cover, wherein the liquid level meter is used to indicate the liquid level inside the casing;

[0007] A pressure relief assembly, comprising an air duct arranged on the outer wall of the conical manhole cover, a protective shell sleeved on the outer wall of the air duct, an air tank arranged on the inner wall of the protective shell, a microphone arranged on the upper end of the air duct, a pressure relief ring arranged on the outer side of the microphone, a fixing shell arranged on the inner wall of the pressure relief ring, a push column arranged on the inner wall of the fixing shell, and a mounting shell arranged on the upper end of the pressure relief ring;

[0008] The early warning component comprises a rotating ring arranged at the upper end of the mounting shell, a moving block arranged at the upper end of the rotating ring and a bell shell fixed at the upper end of the mounting shell.

[0009] As a preferred solution of the explosion-proof dynamic liquid level testing device of the present invention, an oil pipe is provided through the inner wall of the conical manhole cover and the lower end of the oil pipe extends to the inside of the casing, and a float is provided at the lower end of the liquid level meter extending to the inner wall of the casing.

[0010] As a preferred solution of the explosion-proof dynamic liquid level testing device described in the present invention, wherein: the inner wall of the pressure relief ring is provided with a cavity, the outer wall array of the cavity is provided with an air leakage hole, the outer wall of the fixed shell is provided with a first through hole, the lower end of the fixed shell is provided with a flow cavity, the first through hole is opened on the outer wall of the flow cavity, and the lower end of the fixed shell is also provided with a notch.

[0011] As a preferred solution of the explosion-proof dynamic liquid level testing device described in the present invention, a sealing shell is also arranged inside the fixed shell, a slot is provided at the upper end of the sealing shell, a groove is provided at the lower end of the sealing shell, a second through hole is provided in an array on the outer wall of the groove, an air hole is provided at the upper end of the groove, and the upper end of the air hole is connected to the slot.

[0012] As a preferred solution of the explosion-proof dynamic liquid level testing device described in the present invention, wherein: the push column is movably arranged on the inner wall of the sealing shell, a push block is fixed to the lower end of the push column, the upper end of the push column extends to the inside of the groove and a limiting block is arranged at the end, and the outer wall of the push column is sleeved with a first elastic member.

[0013] As a preferred solution of the explosion-proof dynamic liquid level testing device described in the present invention, wherein: the mounting shell is fixed to the upper end of the pressure relief ring and is sleeved on the outside of the fixed shell, a limiting rod is fixed inside the mounting shell, a limiting ring is sleeved on the outer wall of the lower end of the limiting rod, a second elastic part is sleeved on the outer wall of the limiting rod, and a threaded air hole is opened through the upper end of the mounting shell.

[0014] As a preferred solution of the explosion-proof dynamic liquid level testing device of the present invention, the swivel is movably arranged at the upper end of the mounting shell, an arc groove is provided on the upper end surface of the swivel, and an inclined plate is arranged in an array on the lower end surface of the swivel.

[0015] As a preferred solution of the explosion-proof dynamic liquid level testing device described in the present invention, a slide plate is provided on the outer wall of the moving block, a slide column is provided on the lower end of the moving block, and the end of the slide column extends to the inner wall of the arc groove and slidably cooperates therewith.

[0016] As a preferred solution of the explosion-proof dynamic liquid level testing device of the present invention, a third elastic member is fixed to the outer wall of the moving block, and an impact block is fixed to the end of the third elastic member.

[0017] As a preferred solution of the explosion-proof dynamic liquid level testing device described in the present invention, wherein: a limiting plate is fixed to the inner wall of the bell shell, a slide is provided at the end of the limiting plate, the end of the moving block extends to the inner wall of the slide and slidably cooperates with it, a limiting groove is provided on the inner wall of the slide, and the end of the slide plate extends to the inner wall of the limiting groove and slidably cooperates with it.

[0018] Beneficial effects of the present invention: The present invention increases safety by providing a liquid level measurement component, a pressure relief component and an early warning component, and adopts a combination of mechanical and sensor measurement. When the internal sensor is damaged and cannot test the accurate value in time, the height of the internal liquid level can be visually checked through the float, and through the pressure relief component, when the pressure inside the oil well suddenly increases, the pressure can be released to the outside through the movement of the internal sealing shell and the push column, thereby alleviating the high pressure in the air guide pipe. At the same time, the early warning component will also emit a warning sound to remind the staff, thereby improving the safety of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0021] Figure 2 It is a side cross-sectional view of the protective shell in the present invention.

[0022] Figure 3 It is a schematic diagram of the connection relationship between the pressure relief ring and the mounting shell in the present invention.

[0023] Figure 4It is a side sectional view of the pressure relief ring and the mounting shell in the present invention.

[0024] Figure 5 It is a side sectional view of the internal structure of the installation shell in the present invention.

[0025] Figure 6 For the present invention Figure 5 A schematic diagram of the enlarged structure in FIG.

[0026] Figure 7 It is a schematic diagram of the explosion of the early warning component in the present invention.

[0027] Figure 8 For the present invention Figure 7 Schematic diagram of the enlarged structure at point B in FIG.

[0028] Fig. 9 It is a side sectional view of the bell shell in the present invention.

[0029] Reference numerals:

[0030] 100, liquid level measuring assembly; 101, casing; 102, conical manhole cover; 1021, oil pipe; 103, liquid level meter; 1031, float;

[0031] 200, pressure relief assembly; 201, air guide tube; 202, protective shell; 203, gas tank; 204, microphone; 205, pressure relief ring; 2051, cavity; 2052, air leakage hole; 206, fixed shell; 2061, first through hole; 2062, flow cavity; 2063, notch; 2064, blocking shell; 2065, slot; 2066, groove; 2067, second through hole; 2068, air hole; 207, push column; 2071, push block; 2072, limit block; 2073, first elastic member; 208, mounting shell; 2081, limit rod; 2082, limit ring; 2083, second elastic member; 2084, threaded air hole;

[0032] 300, warning component; 301, swivel; 3011, arc groove; 3012, inclined plate; 302, moving block; 3021, slide plate; 3022, slide column; 3023, third elastic member; 3024, impact block; 303, bell shell; 3031, limit plate; 3032, slideway; 3033, limit groove. DETAILED DESCRIPTION

[0033] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0034] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0035] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0036] Example 1

[0037] Reference Figure 1~Figure 3 , which is the first embodiment of the present invention, provides an explosion-proof dynamic liquid level testing device.

[0038] Specifically, the liquid level measuring assembly 100 includes a casing 101, a conical manhole cover 102 disposed at the upper end of the casing 101, and a liquid level meter 103 disposed at the upper end of the conical manhole cover 102, wherein the liquid level meter 103 is used to indicate the liquid level inside the casing 101;

[0039] The pressure relief assembly 200 includes an air guide tube 201 disposed on the outer wall of the conical manhole cover 102, a protective shell 202 sleeved on the outer wall of the air guide tube 201, a gas tank 203 disposed on the inner wall of the protective shell 202, a microphone 204 disposed on the upper end of the air guide tube 201, a pressure relief ring 205 disposed on the outer side of the microphone 204, a fixing shell 206 disposed on the inner wall of the pressure relief ring 205, a push column 207 disposed on the inner wall of the fixing shell 206, and a mounting shell 208 disposed on the upper end of the pressure relief ring 205;

[0040] The warning assembly 300 includes a rotating ring 301 disposed at the upper end of the mounting shell 208 , a moving block 302 disposed at the upper end of the rotating ring 301 , and a bell shell 303 fixed to the upper end of the mounting shell 208 .

[0041] The casing 101 is inserted deep into the ground, the conical manhole cover 102 is fixed on the top of the casing 101 and installed on the ground, and the liquid level meter 103 is fixed on the upper surface of the conical manhole cover 102. The height of the liquid level inside the casing 101 is measured and displayed by the liquid level meter 103.

[0042] The air duct 201 is connected to the conical manhole cover 102, and is connected to the sleeve 101 below the conical manhole cover 102. The air inside the sleeve 101 enters the air duct 201. The protective shell 202 fixed on the outside of the air duct 201 is made of high-strength explosion-proof material, which can effectively isolate the external explosive environment and protect the internal test components from damage.

[0043] The gas tank 203 is connected to the outside, and compressed gas is transported to the inside of the oil well through the air pipe 201 to generate sound wave signals. These sound wave signals propagate in the oil well and are reflected by the liquid surface, and then are received by the microphone 204 and used for subsequent analysis and processing. At the same time, a pressure relief ring 205 is installed above the air pipe 201. When a sudden increase in high air pressure occurs inside the oil well due to some reason, the air pressure pushes the sealing shell 2064 and the push column 207 to move, and releases the air pressure to the outside for relief. At the same time, when the air pressure is released to the outside, it will also drive the swivel 301 on the top of the mounting shell 208 to move, and drive the moving block 302 on the upper surface of the swivel 301 to move inside the bell shell 303, and hit the bell shell 303 back and forth to make it emit a warning sound to remind the staff.

[0044] Preferably, an oil pipe 1021 is provided through the inner wall of the conical manhole cover 102 and the lower end of the oil pipe 1021 extends to the inside of the casing 101 , and the lower end of the liquid level meter 103 extends to the inner wall of the casing 101 and is provided with a float 1031 .

[0045] Among them, the oil pipe 1021 is fixed under the conical manhole cover 102 and is used to extract underground oil. The liquid level inside the casing 101 can be tested by the float 1031. Due to the complex environment inside the oil well, it is easy to cause damage to electronic components and destroy the accuracy of electronic sensors. Therefore, auxiliary testing is also required through mechanical means.

[0046] In summary, when in use, through the connection between the air duct 201 and the conical manhole cover 102, the compressed gas in the gas tank 203 can enter the oil well through the air duct 201 and generate an acoustic wave signal. The generated signal is received and analyzed by the microphone 204 to measure the height information of the dynamic liquid level inside the oil well. At the same time, because the environment inside the oil well can easily cause damage to the electronic sensor and easily destroy the accuracy of the sensor detection, a float 1031 is added under the conical manhole cover 102 to assist in measuring the internal liquid level height.

[0047] At the same time, a pressure relief ring 205 is installed above the air guide tube 201, and is installed inside the protective shell 202 together with the gas tank 203 and the microphone 204. The protective shell 202 protects the internal components. When high air pressure suddenly appears inside the oil well, the sealing shell 2064 and the push rod 207 inside the pressure relief ring 205 move inside and below the mounting shell 208 to release the high pressure to the outside, thereby relieving the internal pressure and protecting the test device. While releasing the high pressure, the high-pressure gas will blow the swivel 301 on the top of the mounting shell 208 to rotate, and the moving block 302 above the swivel 301 moves inside the bell shell 303, causing the bell shell 303 to emit a warning sound to alert the staff.

[0048] Example 2

[0049] Reference Figure 2~Figure 7 , which is the second embodiment of the present invention, and this embodiment is based on the previous embodiment.

[0050] Specifically, a cavity 2051 is opened on the inner wall of the pressure relief ring 205, an air leakage hole 2052 is opened in an array on the outer wall of the cavity 2051, a first through hole 2061 is opened on the outer wall of the fixed shell 206, a flow cavity 2062 is opened on the lower end of the fixed shell 206, the first through hole 2061 is opened on the outer wall of the flow cavity 2062, and a notch 2063 is also provided on the lower end of the fixed shell 206.

[0051] The pressure relief ring 205 is fixed above the air guide tube 201 , the bottom of the pressure relief ring 205 is connected to the air guide tube 201 , and the gas inside the air guide tube 201 flows to the bottom of the pressure relief ring 205 .

[0052] An array of vent holes 2052 is provided on the outer wall of the cavity 2051 . When the internal high-pressure gas enters the cavity 2051 from the bottom of the pressure relief ring 205 , it is released to the outside through the vent holes 2052 .

[0053] The fixed shell 206 is fixed on the inner wall of the pressure relief ring 205, and the first through hole 2061 opened on the surface of the fixed shell 206 is located at the middle height of the cavity 2051. The high-pressure gas enters the flow cavity 2062 at the bottom of the fixed shell 206 through the recess 2063 at the bottom of the fixed shell 206, and then flows into the cavity 2051 of the pressure relief ring 205 through the first through hole 2061 at the bottom of the fixed shell 206, and then flows out to the outside from the gas relief hole 2052.

[0054] Preferably, a blocking shell 2064 is also provided inside the fixed shell 206, a slot 2065 is provided at the upper end of the blocking shell 2064, a groove 2066 is provided at the lower end of the blocking shell 2064, a second through hole 2067 is provided in an array on the outer wall of the groove 2066, an air hole 2068 is provided at the upper end of the groove 2066, and the upper end of the air hole 2068 is connected to the slot 2065.

[0055] Among them, the upper outer wall of the blocking shell 2064 is locked by the fixed shell 206 and will not fall downward. The blocking shell 2064 moves inside the fixed shell 206. A slot 2065 is opened on the top of the blocking shell 2064, and a groove 2066 is opened at the bottom of the blocking shell 2064. There are several air holes 2068 in the middle array of the slot 2065 and the groove 2066. The slot 2065 and the groove 2066 are connected through the air holes 2068, so that the gas at the bottom can flow from the groove 2066 to the inside of the slot 2065.

[0056] The push column 207 is movably arranged on the inner wall of the blocking shell 2064, a push block 2071 is fixed to the lower end of the push column 207, the upper end of the push column 207 extends to the inside of the slot 2065 and a limit block 2072 is arranged at the end, and a first elastic member 2073 is sleeved on the outer wall of the push column 207.

[0057] Among them, the push column 207 moves on the inner wall of the sealing shell 2064, and the push block 2071 at the bottom of the push column 207 is initially located in the groove 2066 at the bottom of the sealing shell 2064. Under the influence of the first elastic member 2073 located inside the slot 2065, the push block 2071 at the bottom of the push column 207 is lifted upward, so that the push block 2071 is close to the surface of the groove 2066, blocking the air hole 2068.

[0058] Preferably, the mounting shell 208 is fixed to the upper end of the pressure relief ring 205 and is sleeved on the outside of the fixed shell 206, a limiting rod 2081 is fixed inside the mounting shell 208, a limiting ring 2082 is sleeved on the outer wall of the lower end of the limiting rod 2081, a second elastic member 2083 is sleeved on the outer wall of the limiting rod 2081, and a threaded air hole 2084 is opened through the upper end of the mounting shell 208.

[0059] Among them, the mounting shell 208 is fixed on the upper surface of the pressure relief ring 205, and is also sleeved on the outside of the fixed shell 206 as the outer shell part. A limiting rod 2081 is fixed in the middle position inside the mounting shell 208. The limiting rod 2081 is opposite to the position of the push column 207. At the same time, there is a small distance between the limiting rod 2081 and the push column 207. A second elastic member 2083 is arranged on the outside of the limiting rod 2081. The bottom circle of the second elastic member 2083 abuts against the top outer circle position of the blocking shell 2064, pushing the blocking shell 2064 downward, so that the upper end protrusion of the blocking shell 2064 is engaged with the upper protrusion of the fixed shell 206, so that the two are closely connected. At the same time, a limiting ring 2082 is fixed at the bottom position of the limiting rod 2081.

[0060] In summary, when in use, the pressure relief ring 205 is connected to the air pipe 201. When the air pressure inside the oil well suddenly increases due to some reason, the oil well is connected to the air pipe 201, so that the air pressure inside the air pipe 201 rises synchronously. Since a solenoid valve is installed between the connecting section of the gas tank 203 and the air pipe 201, the high air pressure inside the air pipe 201 will not be output to the outside through the gas tank 203. At this time, the high air pressure fills the inside of the air pipe 201.

[0061] Due to the influence of the environment inside the oil well, the internal air pressure fluctuates. When the internal air pressure becomes high but does not reach a dangerous value, its air pressure is synchronized to the inside of the air pipe 201. At this time, the pressure relief ring 205 located above the air pipe 201 will release the high internal air pressure to relieve the internal pressure.

[0062] At this time, the air pressure inside the air guide tube 201 impacts the recess 2063 at the bottom of the fixed shell 206. Since the push block 2071 at the bottom of the push column 207 is close to the groove 206 at the bottom of the blocking shell 2064, the high air pressure at this time pushes the blocking shell 2064 and the internal push column 207 to move upward together inside the fixed shell 206. At this time, the upward movement distance of the blocking shell 2064 is limited, and a gap appears between the bottom of the blocking shell 2064 and the flow cavity 2062 inside the fixed shell 206. At this time, the air pressure inside the air guide tube 201 enters the interior of the flow cavity 2062 through the gap, and then enters the cavity 2051 inside the pressure relief ring 205 from the first through hole 2061 on the surface of the flow cavity 2062, and then is discharged to the outside through the air relief hole 2052 on the surface of the cavity 2051.

[0063] When the air pressure inside the air guide tube 201 increases and becomes dangerous, the blocking shell 2064 and the push column 207 continue to be pushed upward inside the fixed shell 206. At this time, the top end of the push column 207 contacts the lower end of the limit rod 2081, and the push column 207 is restricted and cannot continue to move upward. At this time, the blocking shell 2064 continues to move upward due to the high air pressure. At this time, the push block 2071 at the bottom of the push column 207 begins to distance itself from the groove 2066 at the bottom of the blocking shell 2064, and the push block 2071 is relatively displaced downward at the lower end of the blocking shell 2064. At this time, the second through hole 2067 at the bottom of the blocking shell 2064 is exposed, and the external high-pressure gas can enter the groove 2066 at the bottom of the blocking shell 2064 from the second through hole 2067.

[0064] Since the top position of the push column 207 is resisted by the limit rod 2081, the push column 207 cannot move further, while the blocking shell 2064 continues to move toward the inside of the mounting shell 208 until the top position of the blocking shell 2064 hits the bottom of the limit ring 2082 below the limit rod 2081 and stops moving upward. At this time, the push block 2071 at the bottom of the push column 207 is located at the lower position of the groove 2066 below the blocking shell 2064. Due to the overall upward movement of the blocking shell 2064 and the push column 207, the high-pressure gas in the air guide pipe 201 passes through the blocking shell 2064. The high-pressure gas enters the flow cavity 2062 at the bottom of the fixed shell 206 through the gap at the bottom of the fixed shell 206. At this time, the high-pressure gas not only flows from the first through hole 2061 at the bottom of the fixed shell 206 to the pressure relief ring 205, but also partially enters the groove 2066 through the second through hole 2067 at the bottom of the blocking shell 2064. At this time, part of the high-pressure gas enters the air hole 2068 above through the groove 2066, and then enters the slot 2065, fills the interior of the mounting shell 208, and is discharged to the outside of the mounting shell 208 through the threaded air hole 2084 at the top of the mounting shell 208.

[0065] Example 3

[0066] Reference Figure 7~Figure 9 , which is the third embodiment of the present invention, and this embodiment is based on the previous embodiment.

[0067] Specifically, the rotating ring 301 is movably arranged at the upper end of the mounting shell 208 , an arc groove 3011 is provided on the upper end surface of the rotating ring 301 , and an array of inclined plates 3012 are provided on the lower end surface of the rotating ring 301 .

[0068] Among them, the swivel 301 is installed on the upper surface of the mounting shell 208 and can rotate on the upper surface of the mounting shell 208. A plurality of arc grooves 3011 are opened on the upper surface of the swivel 301. The number of the plurality of arc grooves 3011 is an odd number. At the same time, the arc grooves 3011 are connected end to end to form a whole. A plurality of inclined plates 3012 are arranged in an array on the lower surface of the swivel 301. The inclination direction of the inclined plates 3012 is opposite to the direction of the threaded air holes 2084 on the top of the mounting shell 208. The gas blown out through the threaded air holes 2084 blows on the inclined plates 3012, which can drive the swivel 301 to rotate on the top of the mounting shell 208.

[0069] Preferably, a slide plate 3021 is provided on the outer wall of the moving block 302, a sliding column 3022 is provided on the lower end of the moving block 302, the end of the sliding column 3022 extends to the inner wall of the arc groove 3011 and slidably cooperates therewith, a third elastic member 3023 is fixed to the outer wall of the moving block 302, and an impact block 3024 is fixed to the end of the third elastic member 3023.

[0070] Among them, two moving blocks 302 are symmetrically arranged on the upper surface of the rotating ring 301. The sliding column 3022 at the bottom of the moving block 302 enables the moving block 302 to slide inside the arc groove 3011 on the surface of the rotating ring 301. Because the number of arc grooves 3011 is an odd number, the movements of the two moving blocks 302 in the arc grooves 3011 are not synchronized. When one moves forward, the other will move backward.

[0071] Preferably, a limiting plate 3031 is fixed to the inner wall of the bell shell 303, a slideway 3032 is provided at the end of the limiting plate 3031, the end of the moving block 302 extends to the inner wall of the slideway 3032 and slidably cooperates therewith, a limiting groove 3033 is provided on the inner wall of the slideway 3032, and the end of the slide plate 3021 extends to the inner wall of the limiting groove 3033 and slidably cooperates therewith.

[0072] Among them, the bell shell 303 is fixed on the upper surface of the mounting shell 208, and the limiting plate 3031 fixed inside the bell shell 303 is sleeved on the outside of the moving block 302. The slideway 3032 and the limiting groove 3033 opened on the lower surface of the limiting plate 3031 restrict the moving block 302, so that the moving block 302 can only move back and forth on the lower surface of the limiting plate 3031, instead of rotating with the rotation of the swivel 301.

[0073] When the moving block 302 moves back and forth below the limiting plate 3031, the impact block 3024 on the outside of the moving block 302 hits the inner wall of the bell shell 303 alternately and reciprocatingly, making a sound to remind the staff that the internal air pressure is high at this time and to take corresponding measures.

[0074] In summary, during use, when the air pressure inside the air duct 201 suddenly increases and reaches a dangerous level, the high-pressure gas pushes the sealing shell 2064 and the push column 207 to move upward inside the fixed shell 206, and at this time, a portion of the high-pressure gas enters the cavity 2051 of the pressure relief ring 205 through the first through hole 2061 at the bottom of the fixed shell 206, and is discharged through the air relief hole 2052, thereby alleviating the pressure inside the air duct 201 at this time, and a portion of the high-pressure gas enters the interior of the mounting shell 208 from the air hole 2068 through the groove 2066 at the bottom of the sealing shell 2064, and is then discharged through the threaded air hole 2084 at the top of the mounting shell 208, blowing the swivel ring 301 on the top, and driving the moving blocks 302 on both sides through the arc groove 3011 on the surface of the swivel ring 301 to alternately reciprocate and hit the inner wall of the bell shell 303 inside the bell shell 303, causing it to emit a warning sound.

[0075] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. An explosion-proof dynamic liquid level testing device, characterized in that: include: A liquid level measurement assembly (100) comprises a casing (101), a conical manhole cover (102) arranged at the upper end of the casing (101), and a liquid level meter (103) arranged at the upper end of the conical manhole cover (102), wherein the liquid level meter (103) is used to indicate the height of the liquid level inside the casing (101); A pressure relief assembly (200), comprising an air guide tube (201) arranged on the outer wall of the conical manhole cover (102), a protective shell (202) sleeved on the outer wall of the air guide tube (201), an air tank (203) arranged on the inner wall of the protective shell (202), a microphone (204) arranged on the upper end of the air guide tube (201), a pressure relief ring (205) arranged outside the microphone (204), a fixing shell (206) arranged on the inner wall of the pressure relief ring (205), a push column (207) arranged on the inner wall of the fixing shell (206), and a mounting shell (208) arranged on the upper end of the pressure relief ring (205); An early warning assembly (300) comprises a rotating ring (301) arranged at the upper end of the mounting shell (208), a moving block (302) arranged at the upper end of the rotating ring (301), and a bell shell (303) fixed to the upper end of the mounting shell (208); An oil pipe (1021) is provided through the inner wall of the conical manhole cover (102), and the lower end of the oil pipe (1021) extends into the interior of the casing (101); the lower end of the liquid level meter (103) extends to the inner wall of the casing (101) and is provided with a float (1031); The inner wall of the pressure relief ring (205) is provided with a cavity (2051), the outer wall of the cavity (2051) is provided with an array of air leakage holes (2052), the outer wall of the fixed shell (206) is provided with a first through hole (2061), the lower end of the fixed shell (206) is provided with a flow cavity (2062), the first through hole (2061) is opened on the outer wall of the flow cavity (2062), and the lower end of the fixed shell (206) is also provided with a notch (2063); A blocking shell (2064) is further provided inside the fixed shell (206), a slot (2065) is provided at the upper end of the blocking shell (2064), a groove (2066) is provided at the lower end of the blocking shell (2064), a second through hole (2067) is provided in an array on the outer wall of the groove (2066), an air hole (2068) is provided at the upper end of the groove (2066), and the upper end of the air hole (2068) is connected to the slot (2065); The push column (207) is movably arranged on the inner wall of the blocking shell (2064), a push block (2071) is fixed to the lower end of the push column (207), the upper end of the push column (207) extends into the interior of the slot (2065) and a limit block (2072) is arranged at the end, and the outer wall of the push column (207) is sleeved with a first elastic member (2073); The mounting shell (208) is fixed to the upper end of the pressure relief ring (205) and sleeved on the outside of the fixing shell (206); a limiting rod (2081) is fixed inside the mounting shell (208); a limiting ring (2082) is sleeved on the outer wall of the lower end of the limiting rod (2081); a second elastic member (2083) is sleeved on the outer wall of the limiting rod (2081); and a threaded air hole (2084) is penetrated through the upper end of the mounting shell (208); The rotating ring (301) is movably arranged at the upper end of the mounting shell (208); an arc groove (3011) is provided on the upper end surface of the rotating ring (301); and an array of inclined plates (3012) are provided on the lower end surface of the rotating ring (301).

2. The explosion-proof dynamic liquid level testing device according to claim 1, characterized in that: The outer wall of the moving block (302) is provided with a sliding plate (3021), the lower end of the moving block (302) is provided with a sliding column (3022), and the end of the sliding column (3022) extends to the inner wall of the arc groove (3011) and slidably cooperates therewith.

3. The explosion-proof dynamic liquid level testing device according to claim 2, characterized in that: A third elastic member (3023) is fixed to the outer wall of the moving block (302), and an impact block (3024) is fixed to the end of the third elastic member (3023).

4. The explosion-proof dynamic liquid level testing device according to claim 3, characterized in that: A limiting plate (3031) is fixed to the inner wall of the bell shell (303), a slideway (3032) is provided at the end of the limiting plate (3031), an end of the moving block (302) extends to the inner wall of the slideway (3032) and slidably cooperates therewith, a limiting groove (3033) is provided on the inner wall of the slideway (3032), and an end of the sliding plate (3021) extends to the inner wall of the limiting groove (3033) and slidably cooperates therewith.

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