Liquid level detection device and fuel cabinet

Abstract

The utility model discloses a liquid level detection device and a fuel cabinet, and relates to the technical field of liquid level detection.The liquid level detection device comprises a first detection assembly located in equipment to be detected, the first detection assembly comprises an installation sleeve, a first cavity is formed in a first installation section in the vertical direction, and the lower portion of the first cavity is communicated with liquid in the equipment to be detected; a plurality of air inlet holes communicated with the first cavity are formed in the first mounting section, and a liquid level sensor capable of moving in the vertical direction is arranged in the first cavity; therefore, the liquid level sensor can move up and down in the first cavity along with the change of the liquid level of liquid in the to-be-detected equipment, and accurate detection of the liquid level of the to-be-detected equipment is achieved. The buffer piece enables the liquid in the equipment to be detected not to directly enter the first cavity easily under the influence of external factors, so that the accuracy of detecting the liquid level of the equipment to be detected by the first detection assembly is ensured; and detection data of the first detection assembly and the second detection assembly are integrated, so that the liquid level detection precision of the liquid level detection device is further improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to liquid level detection field, in particular to a kind of liquid level detection device and fuel cabinet. BACKGROUND

[0002] Liquid level detection device is a kind of equipment for measuring the height of liquid (liquid level) in container or pipeline. However, due to the influence of factors such as application scene of liquid level detection device or equipment where liquid level detection device is placed, there is a large error in the use of liquid level detection device, which cannot accurately reflect the real liquid level of the equipment to be measured.

[0003] Therefore, how to improve the accuracy of liquid level measurement of liquid level detection device has become a technical problem to be solved by the technical personnel in the field. UTILITY MODEL CONTENT

[0004] The utility model aims at providing a kind of liquid level detection device and fuel cabinet to improve the accuracy of liquid level detection of liquid level detection device.

[0005] To achieve the above-mentioned purpose, the utility model provides the following scheme:

[0006] The utility model provides a kind of liquid level detection device, the liquid level detection device includes:

[0007] First detection component, the first detection component is located in the equipment to be measured, and the first detection component includes: mounting sleeve, the mounting sleeve includes first installation section, the first installation section has first cavity arranged in vertical direction in it, the lower part of the first cavity is communicated with the equipment to be measured, a plurality of air inlet holes communicated with the first cavity are provided on the first installation section, the air inlet hole is communicated with the outside or the equipment to be measured, and liquid level sensor movable in vertical direction is provided in the first cavity;Buffering member is provided on the path of liquid into the first cavity, and the buffering member is used to increase the damping of liquid into the first cavity;

[0008] Second detection component, the second detection component is used to detect the liquid level of the equipment to be measured.

[0009] Preferably, the buffering member includes second installation section connected with the first installation section, and the second installation section has second cavity communicated with the first cavity and the equipment to be measured respectively in it.

[0010] Among them, the second cavity is arranged in horizontal direction.

[0011] Alternatively, the second cavity includes a plurality of first bending sections connected in series.

[0012] Preferably, the buffering member includes a plurality of partitions arranged in the first cavity along the flow direction of liquid, and a plurality of through holes are provided on the partitions.

[0013] And / or, the to-be-tested equipment comprises a tank storing liquid, and the tank comprises a plurality of communicated second bending sections.

[0014] And / or, the to-be-tested equipment is internally provided with a plurality of wave-preventing plates.

[0015] Preferably, the first detection assembly comprises an inclination sensor connected with the first mounting section; and / or, the to-be-tested equipment is provided with a mounting area opening in the vertical direction, and the mounting area is used for mounting the first mounting section.

[0016] In addition, the utility model discloses a fuel cabinet, its characterized in that, the fuel cabinet includes above-mentioned liquid level detection device, when, the to-be-tested equipment is the fuel cabinet, the liquid in the to-be-tested equipment is fuel;

[0017] The fuel cabinet comprises a first shell, the first shell is used for storing fuel, the first shell is communicated with a first intermediate container through a first exhaust pipe, the first intermediate container is communicated with an engine through a second exhaust pipe, the first intermediate container is provided with a pressure stabilizing valve, and the second exhaust pipe is provided with a first valve; when the engine works, the pressure stabilizing valve and the first valve are in the open state; when the engine is standby, the pressure stabilivating valve and the first valve are in the closed state.

[0018] Preferably, the fuel cabinet comprises an in-out pipe, both ends of the in-out pipe are communicated with the first shell, the out end of the in-out pipe is provided with an out valve, the back end of the in-out pipe is provided with a back valve, the in-out pipe is provided with a first conveying pump, and the in-out pipe is connected with the engine through a fuel rail.

[0019] The fuel rail comprises a second intermediate container communicated with the in-out pipe, the second intermediate container is communicated with the engine through a feeding pipe and a back pipe respectively, and the back pipe is provided with a second conveying pump.

[0020] Preferably, the fuel cabinet comprises a heat exchange assembly, the heat exchange assembly comprises a heat exchange source, a heat exchange pipe group and a driving part, the heat exchange pipe group is in contact with fuel in the first shell, and the driving part is used for driving heat exchange medium to flow in the heat exchange pipe group.

[0021] Preferably, the heat exchange pipe group comprises a first heat exchange pipe and a second heat exchange pipe both communicated with the heat exchange source, the first heat exchange pipe is arranged outside the first shell and is in contact with fuel in the first shell, the second heat exchange pipe is communicated with the first heat exchange pipe, and the second heat exchange pipe is provided with a cooler.

[0022] Alternatively, the heat exchange tube group comprises a third heat exchange tube arranged outside the first shell or inside the first shell, and the driving member is arranged on the third heat exchange tube, and both ends of the third heat exchange tube are communicated with the heat exchange source.

[0023] Preferably, the fuel tank is arranged symmetrically with the centerline of the ship body as the symmetry axis, and the second detection assembly is located on the centerline of the ship body.

[0024] Preferably, the fuel tank is provided with a safety valve and an inspection hole, and / or the fuel tank is provided with a discharge valve communicated with the first shell, and / or the first shell is provided with a filling pipe communicated with the first shell, a first end of the filling pipe extends into the first shell, a second end of the first shell is used for filling fuel, and the second end of the first shell is sequentially provided with a cover plate, a filling valve and a filter along the filling direction.

[0025] The present application has the following technical effects compared with the prior art:

[0026] The liquid level detection device comprises a first detection assembly arranged in a to-be-detected equipment, the first detection assembly comprises a mounting sleeve, the mounting sleeve comprises a first mounting section, the first mounting section has a first cavity arranged in a vertical direction and communicated with the to-be-detected equipment, a plurality of air inlet holes are arranged on the first mounting section and communicated with the first cavity, and a liquid level sensor is arranged in the first cavity and can move in the vertical direction; wherein the air inlet holes enable the first cavity to be communicated with external gas, so that the liquid level sensor and liquid in the first cavity can fall under the action of pressure difference after the liquid surface in the to-be-detected equipment drops, for subsequent liquid level detection, which avoids the problem that, if the air inlet holes are not arranged, the sensor and liquid rise in the first cavity to form a negative pressure space, so that the liquid and the liquid level sensor cannot fall and accurate detection of the subsequent liquid surface of the to-be-detected equipment cannot be performed, and the liquid level sensor can move up and down in the first cavity with the change of the liquid surface of the liquid in the to-be-detected equipment, so that accurate detection of the liquid level of the to-be-detected equipment is realized.

[0027] In addition, the first detection assembly further comprises a buffer arranged on the path of the liquid entering the first cavity, and the buffer is used to increase the damping of the liquid entering the first cavity, so that the liquid in the to-be-detected equipment is less likely to directly enter the first cavity under the influence of external factors, and the situation that the liquid level sensor accidentally rises in the first cavity due to the influence of external factors and the detection result of the first detection assembly is inaccurate is reduced under the condition that the total amount of the liquid in the to-be-detected equipment is unchanged, and the accuracy of the first detection assembly in detecting the liquid level of the to-be-detected equipment is ensured.

[0028] Furthermore, the liquid level detection device further comprises a second detection assembly, which can also be used for detecting the liquid level height of the to-be-detected equipment, and the detection data of the first detection assembly and the second detection assembly are integrated, which reduces the problem that the detection data is one-sided and the detection accuracy is poor due to the detection of the liquid level height of the to-be-detected equipment by the first detection assembly or the second detection assembly alone, thereby further improving the detection accuracy of the liquid level detection device.

[0029] In summary, based on the above factors, the liquid level detection device effectively improves the detection accuracy of the liquid level. BRIEF DESCRIPTION OF DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed in the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0031] Figure 1 is a structural schematic view of a fuel cabinet;

[0032] Figure 2 is a structural schematic view of a buffer in a labyrinth structure;

[0033] Figure 3 is a front view of a buffer in a labyrinth structure;

[0034] Among them, 1, inlet valve; 2, outlet valve; 3, bypass valve; 4, liquid level sensor; 5, mounting sleeve; 6, first controller; 7, second detection assembly; 8, first intermediate container; 9, first valve; 10, second controller; 11, third exhaust pipe; 12, pressure stabilizing valve; 13, filter; 14, feed valve; 15, access hole; 16, cover plate; 17, discharge valve; 18, return valve; 19, discharge valve; 20, safety valve; 21, cooler; 22, first delivery pump; 23, fuel rail; 24, buffer plate; 25, first cavity; 26, second cavity. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0036] In order to make the above objects, features and advantages of the present application more obvious and easy to understand, the present application will be further described in detail below with reference to the drawings and specific embodiments.

[0037] As shown in Figure 1 The utility model discloses a liquid level detection device, liquid level detection device includes: first detection subassembly, first detection subassembly is located in the equipment to be measured, and first detection subassembly includes: mounting sleeve 5, and mounting sleeve 5 includes first installation section, and first installation section has the first cavity 25 of setting along vertical direction in, and the lower part of first cavity 25 is linked with the equipment to be measured, and is equipped with a plurality of air inlet holes with first cavity 25 intercommunication on first installation section, and is equipped with the liquid level sensor 4 of movable along vertical direction in first cavity 25, buffer piece, buffer piece is located on the path of liquid into first cavity 25, and buffer piece is used to increase the damping of liquid into first cavity 25, second detection subassembly 7, and second detection subassembly 7 is used to detect the liquid level of equipment to be measured.

[0038] The utility model discloses a liquid level detection device including first detection subassembly in the equipment to be measured, and first detection subassembly includes mounting sleeve 5, and mounting sleeve 5 includes the first installation section of being linked with equipment to be measured, and first installation section has the first cavity 25 of setting along vertical direction in, and the lower part of first cavity 25 is linked with equipment to be measured, and is equipped with a plurality of air inlet holes with first cavity 25 intercommunication on first installation section, and air inlet hole is linked with the outside or equipment to be measured, and is equipped with the liquid level sensor 4 of movable along vertical direction in first cavity 25, wherein, air inlet hole makes first cavity 25 with outside gas intercommunication, this makes the liquid level sensor 4 in first cavity 25 and liquid can fall under the action of pressure difference after the liquid surface in equipment to be measured drops, to subsequent liquid level detection, this avoids the problem that sensor and liquid form negative pressure space after rising in first cavity 25 due to not setting air inlet hole, leads to liquid and liquid level sensor 4 unable to drop, can not accurately detect the subsequent liquid surface of equipment to be measured, this makes liquid level sensor 4 can move up and down in first cavity 25 along with the liquid surface change of liquid in equipment to be measured, thereby realizes the accurate detection of equipment to be measured liquid level;

[0039] And, first detection subassembly still includes the buffer piece of being located on the path of liquid into first cavity 25, and buffer piece can increase the damping of liquid into first cavity 25, this makes liquid in equipment to be measured more difficult to directly enter first cavity 25 under the influence of external factors, reduces the situation that liquid level sensor 4 accidentally rises in first cavity 25 due to the influence of external factors under the condition that the total amount of liquid in equipment to be measured is unchanged, the accuracy of first detection subassembly detecting the liquid level of equipment to be measured is guaranteed;

[0040] Moreover, the liquid level detection device further comprises a second detection assembly 7, which can also be used to detect the liquid level of the to-be-detected equipment, and the detection data of the first detection assembly and the second detection assembly 7 are integrated, which reduces the problem that the detection data is one-sided and the detection accuracy is poor due to the detection of the liquid level of the to-be-detected equipment by the first detection assembly or the second detection assembly 7 alone, thereby further improving the accuracy of the liquid level detection device in detecting the liquid level.

[0041] The first mounting section can be connected with the to-be-detected equipment, at this time, the first mounting section is installed in the to-be-detected equipment to keep the first cavity 25 vertical, or the first mounting section can not be connected with the to-be-detected equipment, for example, the first mounting section abuts against the to-be-detected equipment in the length direction or the width direction of the to-be-detected equipment, so as to keep the first cavity 25 vertical. It should be noted that the first mounting section is arranged in parallel with respect to the first cavity 25, at this time, when the first mounting section is vertically arranged, it means that the first cavity 25 is vertically arranged, or the first mounting section can also be arranged not in parallel with respect to the first cavity 25, at this time, when the first mounting section is assembled in the to-be-detected equipment, the posture of the first cavity 25 is adjusted. The first mounting section can be a shell with the first cavity 25 inside. The first mounting section can be a square tube, the cross section of the square tube can be 80mm*80mm, the height is 950mm, the upper part of the square tube is welded with the top of the first shell, the square tube is provided with a gas permeable hole communicated with the first shell, the gas permeable hole can be in a matrix form, each gas permeable hole has a diameter of 4mm, and the number is 8*8 (8 rows*8 columns).

[0042] Because the liquid in the to-be-detected equipment is kept horizontal under the action of gravity, the vertical arrangement of the first cavity 25 in the utility model lays a foundation for accurately detecting the real height of the liquid surface in the to-be-detected equipment, and reduces the problem that the first detection assembly has detection errors due to the inclined arrangement of the first cavity 25.

[0043] The lower part of the first cavity 25 in communication with the device to be tested can be the bottom end of the first cavity 25, and / or a side area close to the bottom end, etc. The communication area of the first cavity 25 with the device to be tested is arranged so that the liquid level sensor 4 in the first cavity 25 can move up and down in the first cavity 25 as the liquid level in the device to be tested changes. The lower part of the first cavity 25 in communication with the device to be tested means that when a certain amount of liquid enters the device to be tested, the liquid can enter the first cavity 25, driving the liquid level sensor 4 to move up and down in the first cavity 25, thereby realizing the detection of the liquid level of the device to be tested. The air inlet hole can be in communication with the outside atmosphere or the device to be tested, depending on the type of medium to be tested, etc. For example, when the device to be tested stores methanol and other flammable and explosive liquids, in order to reduce the risk of accidents, the air inlet hole needs to be in communication with the inside of the device to be tested, and because the storage container retains a certain amount of safety space, the device to be tested also retains air. When the liquid stored in the device to be tested is harmless, not easily explosive, and relatively safe to the surrounding environment, the air inlet hole can be directly in communication with the outside atmosphere. The liquid level sensor 4 can be a floating ball type liquid level sensor or other sensors that can detect the liquid level in the device to be tested according to the change of the liquid level in the first cavity 25. When the first detection only includes the first mounting section, the bottom of the first mounting section is provided with a limiting rod or other structure to prevent the liquid level sensor 4 from sliding out of the first cavity 25. Alternatively, when the second mounting section is a turning section, that is, the included angle between the second mounting section and the first mounting section is such that the liquid level sensor 4 does not slide out of the first cavity 25, the limiting rod or other structure can be omitted.

[0044] The buffer has various forms of arrangement. The buffer includes a second mounting section connected to the first mounting section, and the second mounting section has a second cavity 26 connected to the first cavity 25 and the device to be tested, respectively. The second cavity 26 can be arranged in the horizontal direction. At this time, the arrangement of the second cavity 26 prolongs the damping of the fluid flowing in the horizontal direction, reducing the fluctuation of the liquid in the device to be tested, specifically the liquid in the first cavity 25, affected by external factors. The second mounting section is a shell with the second cavity 26 inside. The second mounting section is arranged in the bow-to-stern direction, and a square tube with a cross section of 80mm*80mm and a length of 1200mm can be used, and the opening is at the end away from the first mounting section.

[0045] Alternatively, the second cavity 26 is also arranged obliquely relative to the first cavity 25, and / or the second cavity 26 includes a plurality of first bending sections connected to each other. According to different shapes of the first bending section, the second cavity 26 also has different shapes. When the first bending section is a circular arc bending section, the second cavity 26 is in a wave shape or a spiral shape. Figure 2 、 Figure 3As shown, when the first bending section is a right-angle bending section, a plurality of buffer plates 24 are arranged in the second cavity 26, some of the buffer plates 24 are connected to the top of the second cavity 26, and some of the buffer plates 24 are connected to the bottom of the second cavity 26. The second cavity 26 and the buffer plates 24 cooperatively form a "labyrinth structure".

[0046] Alternatively, the buffer member can not adopt the above form. In this case, the buffer member includes a plurality of partitions arranged in the first cavity 25 along the liquid flow direction. The partitions are provided with a plurality of through holes. The partitions and the through holes are arranged to disperse and aggregate the liquid during the process of entering the first cavity 25, thereby increasing the damping of the liquid entering the first cavity 25 and reducing the accidental rise of the liquid surface in the first cavity 25 due to external vibration or fluctuation.

[0047] Furthermore, the device under test includes a tank storing liquid (the tank herein can be understood as the same structure as the first shell hereinafter). The tank includes a plurality of connected second bending sections. By arranging the second bending sections as circular-arc bending sections or right-angle bending sections, the liquid in the tank has a higher damping when entering the first cavity 25, thereby further reducing the problem of the liquid surface rising in the first cavity 25 due to external vibration or fluctuation.

[0048] The second detection assembly 7 can be a glass tube liquid level meter, a magnetic float liquid level meter, a static pressure liquid level meter, a differential pressure liquid level meter, a float ball liquid level meter, a radar liquid level meter, a capacitive liquid level meter, a radio frequency admittance liquid level meter, a magnetostrictive liquid level meter, or a servo liquid level meter, etc. which can realize liquid level measurement. When the second detection assembly 7 is a glass tube liquid level meter, the liquid level tube of the second detection assembly 7 is 900 mm long and 12 mm in diameter, which is used to display the liquid level of the liquid in the first shell on site, thereby reducing the influence of external vibration such as rolling on the liquid level display.

[0049] The device under test is provided with a plurality of wave protection plates. The wave protection plates can be arranged in the vertical direction to increase the damping of the liquid moving into the first cavity 25. The size of the wave protection plate can be 800*750 mm. The wave protection plate can be connected to the first shell by welding or bolt connection, etc. When the device under test is a fuel tank arranged on a ship, the wave protection plates can be arranged at equal intervals along the left and right sides of the ship. Specifically, the wave protection plates can be arranged on the top of the fuel tank.

[0050] Further, the first detection assembly further comprises an inclination sensor connected with the first mounting section, and whether the first mounting section is the first cavity 25 or not is determined by feedback of the inclination sensor. When the first mounting section and the first cavity 25 are arranged in parallel, a mounting area arranged in a vertical direction can also be arranged on the device to be detected, and the first mounting section and the first cavity 25 are arranged vertically by mounting the first mounting section on the mounting area. The mounting area and the first mounting section can be connected by welding or bolt connection.

[0051] In addition, the utility model discloses a kind of fuel cabinet, and fuel cabinet includes above-mentioned liquid level detection device, when the device to be detected is fuel cabinet, liquid in the device to be detected is fuel. Fuel cabinet includes first shell, first shell is used to store fuel, first shell is connected with first intermediate container 8 by first exhaust pipe, first intermediate container 8 is communicated with engine by second exhaust pipe, first intermediate container 8 is communicated with outside by third exhaust pipe 11, third exhaust pipe 11 is equipped with pressure stabilizing valve 12, second exhaust pipe is equipped with first valve 9;When engine works, pressure stabilizing valve 12 and first valve 9 are in open state;When engine standby, pressure stabilizing valve 12 and first valve 9 are in closed state. When engine is in working state, pressure stabilizing valve 12 and first valve 9 are in open state, pressure stabilizing valve 12 makes that outside air can enter first intermediate container 8, reduces the problem that first intermediate container 8 and first cabinet are deformed due to fuel in first intermediate container 8 and first cabinet being sucked away by engine working;To reduce that impurity enters first intermediate container 8, pressure stabilizing valve 12 can be one-way valve allowing air to enter first intermediate container 8, or filter screen can also be arranged at the inlet of first exhaust pipe structure. When engine standby, pressure stabilizing valve 12 and first valve 9 are in closed state, prevent fuel in first shell from volatilizing to outside, cause safety accident etc. problem. First intermediate container 8 can be storage tank that can store a certain amount of liquid. When fuel in first shell is methanol, first intermediate container 8 can be carbon tank that stores activated carbon, first valve 9 can be solenoid valve, and solenoid valve is equipped with second controller 10 for controlling solenoid valve, and the opening and closing of first valve 9 are controlled by the pressure at second exhaust pipe, i.e. by the running state of engine.

[0052] The fuel cabinet comprises an inlet-outlet pipe, both ends of the inlet-outlet pipe are communicated with the first shell, the outlet end of the inlet-outlet pipe is provided with an outlet valve 17, the return end of the inlet-outlet pipe is provided with a return valve 18, the inlet-outlet pipe is provided with a first conveying pump 22, and the inlet-outlet pipe is connected with the engine through a fuel rail 23; the fuel rail 23 comprises a second intermediate container communicated with the inlet-outlet pipe, the second intermediate container is communicated with the engine through a feeding pipe and a return pipe respectively, and the return pipe is provided with a second conveying pump. When the engine works, the first conveying pump 22 is started, the outlet valve 17 and the return valve 18 are opened, and the first conveying pump 22 conveys the fuel such as methanol in the first shell to the corresponding position of the engine through the second intermediate container and the feeding pipe. If there is still surplus fuel after the engine works, the second conveying pump is started, the second conveying pump returns the surplus fuel at the engine to the second intermediate container through the return pipe, and continues to be conveyed into the first shell for subsequent use, so that the operation cost is reduced. The fuel cabinet in the utility model can not only be used as a methanol fuel cabinet for storing methanol, but also can be used for storing other fuels or other materials.

[0053] The fuel cabinet comprises a heat exchange assembly, the heat exchange assembly comprises a heat exchange source, a heat exchange pipe group and a driving member, the heat exchange pipe group is in contact with the fuel in the first shell, and the driving member is used for driving the heat exchange medium to flow in the heat exchange pipe group. The heat exchange source can provide cooling medium or heating medium with required temperature, for example, heating or cooling of the medium is realized through an electric heating wire or a cooling tower, and the driving member can be a conveying pump. The heat exchange pipe group can be in direct contact or indirect contact with the fuel in the first shell, as long as the fuel in the first shell and the heat exchange medium in the heat exchange pipe group can realize heat exchange.

[0054] As Figure 1As shown, the heat exchange pipe group includes a first heat exchange pipe and a second heat exchange pipe, both of which are in communication with the heat exchange source. The first heat exchange pipe is arranged outside the first shell and in contact with the fuel in the first shell. The second heat exchange pipe is in communication with the first heat exchange pipe, and the second heat exchange pipe is provided with a cooler 21. At this time, the first heat exchange pipe is equivalent to a water jacket arranged outside the first shell, and the heat exchange source can be the cylinder liner cooling water of the engine. When the fuel in the first shell is methanol, when the temperature outside the first shell is lower than 10℃, the fuel in the first shell is heated by the cylinder liner cooling water. When the temperature outside the first shell is higher than 15℃, the bypass valve 3 on the second heat exchange pipe is opened, so that the cylinder liner cooling water is cooled by the cooler 21 first, and then enters the first heat exchange pipe to cool the fuel in the first shell, ensuring that the fuel in the first shell is maintained within the suitable range, such as 10-15℃. The cooler 21 has a seawater inlet and a seawater outlet, and the heat exchange medium in the second heat exchange pipe is cooled by seawater. The heat exchange wall between the seawater and the second heat exchange pipe can only have the second heat exchange pipe, i.e. one layer of wall heat exchange, or include the second heat exchange pipe and a heat exchange shell, i.e. two layers of wall heat exchange. The heat exchange shell is a shell for seawater to pass through. 10-15℃ is only an example. At one atmosphere, the temperature of methanol can be maintained at -97.8℃-64.7℃, which ensures that the methanol in the first shell is in a liquid state and does not evaporate. The inlet of the first heat exchange pipe is provided with an inlet valve 1, and the outlet of the second heat exchange pipe is provided with an outlet valve 2. The diameter of the inlet valve 1 and the outlet valve 2 can be 6 minutes.

[0055] Alternatively, the heat exchange pipe group includes a third heat exchange pipe arranged outside the first shell or arranged inside the first shell, and a driving member arranged on the third heat exchange pipe. Both ends of the third heat exchange pipe are in communication with the heat exchange source. The driving member can be a delivery pump. The heat exchange source can provide cooling medium or heating medium with the required temperature, such as heating or cooling the medium by electric heating wire or cooling tower.

[0056] As shown in Figure 1 When the fuel tank is used on a ship, the fuel tank is symmetrically arranged with the centerline of the ship body as the axis of symmetry, which reduces the situation that the liquid level in the first cavity 25 is accidentally fluctuated due to the influence of the gravity of the ship body. The second detection assembly 7 is located on the centerline of the ship body, which also reduces the problem that the detection structure of the second detection assembly 7 has errors due to the influence of the gravity of the ship body. The fuel tank is provided with a safety valve 20 and an inspection hole 15, which can also be called a manhole. A manhole door is arranged at the manhole. The fuel tank is provided with a discharge valve 19 in communication with the first shell. The discharge valve 19 is arranged at the bottom of the first shell and is used to discharge residual fuel. The first shell is provided with a filling pipe in communication with the first shell. The first end of the filling pipe extends into the first shell. The second end of the first shell is used for filling fuel, and the second end of the first shell is sequentially provided with a cover plate 16, a filling valve 14 and a filter element 13 along the filling direction. The filter element 13 can be a filter screen.

[0057] AsFigure 1 As shown, the liquid level sensor 4 is signal connected with a first controller 6, which is used to receive the detection signal of the liquid level sensor 4 and display the liquid level data through a display screen or the like. The first controller 6 can also open and close the first delivery pump 22 according to the liquid level signal, so as to stop the fuel output when the fuel in the first shell is at a low level.

[0058] As shown, the first shell can be made of 304 stainless steel, and the length of the first shell can be 1500mm, the width can be 1000mm, and the height can be 1000mm. The thickness of the first shell is 6mm, and the first heat exchange pipe is equivalent to another layer of shell set outside the first shell, and the interval between the two layers of shells can be 50mm. The bottom of the first shell is provided with a plurality of supporting legs, and the distance between the first shell and the deck can be 30cm. The gap between the first end of the filling pipe and the bottom of the first shell is, for example, 5cm. The diameter of the filling pipe can be 2 inches, the material of the filling pipe is stainless steel, and the second end of the filling pipe can be 15cm higher than the top of the fuel tank. The filling pipe and the first shell are welded or bolted, so as to ensure that the static electricity generated by the fuel tank and the filling pipe can be transmitted to the deck through the supporting legs, thereby reducing the problem of safety accidents caused by static electricity. The discharge valve 17, the return valve 18, the discharge valve 19, the safety valve 20 and the manhole door in the utility model are made of fuel corrosion-resistant materials. Figure 1 The discharge valve 17 can be a 1-inch flange connected stainless steel stop valve, and the valve body sealing gasket is made of fluorine-containing rubber material, which is used for the first shell to provide methanol for the engine. The return valve 18 can be a 1-inch flange connected stainless steel stop valve, and the valve body sealing gasket is made of fluorine-containing rubber material, which is used to return the excess fuel supplied to the engine to the first shell for circulation. The discharge valve 19 can be a 1-inch flange connected stainless steel stop valve, and the valve body sealing gasket is made of fluorine-containing rubber material, which is used to empty the fuel in the first shell for maintenance. The safety valve 20 can be made of stainless steel, and the valve body sealing gasket is made of fluorine-containing rubber material, and the opening pressure is 0.11MPa, which is used to release the fuel to the overflow tank when the pressure in the first shell exceeds the preset pressure value. The manhole door can be made of stainless steel, the inner circle diameter is 600mm, the height of the rim is 200mm, the sealing gasket is made of fluorine-containing rubber material, and it is resistant to fuel corrosion, which is used for maintenance personnel to enter the inside of the first shell.

[0059]

[0060] ​When the first detecting assembly and the second detecting assembly 7 detect that the fuel in the first shell is below the lower limit of the liquid level, the alarm connected with the first controller 6 sends an alarm signal and stops the first delivery pump 22. When adding fuel into the first shell, the cover plate 16 is removed, the fuel storage tank and the filling pipe are connected, the fuel in the storage tank is delivered into the first shell through the delivery pump and other delivery devices, and the feeding valve 14 is opened; when the first detecting assembly and the second detecting assembly 7 monitor that the fuel in the first shell reaches the upper limit of the liquid level, the fuel adding is ended, and the feeding valve 14 is closed.

[0061] In the utility model and / or refer to the text content located and / or front and rear, both can exist simultaneously, also can exist separately. For example, A and / or B include only A or B, and A, B exist simultaneously. And / or and and / or have the same meaning, which will not be described here.

[0062] The utility model discloses multiple technical schemes, but does not exist to give opposite technical inspiration situation.

[0063] The principle and implementation mode of the utility model are described by applying specific examples in the utility model, and the above embodiment is only used for helping to understand the method and core idea of the utility model; simultaneously, for the general technical personnel of the field, according to the thought of the utility model, there will be changes in specific implementation mode and application range. In view of the above, the content of the specification should not be understood as the limitation of the utility model.

Claims

1. A liquid level detecting device characterized by comprising: The liquid level detection device comprises: The first detection assembly is located in the device to be detected, and comprises: a mounting sleeve comprising a first mounting section having a first cavity arranged in a vertical direction in the first mounting section, a lower part of the first cavity being in communication with the device to be detected, a plurality of air inlet holes in communication with the first cavity being arranged on the first mounting section, the air inlet holes being in communication with the outside or the device to be detected, and a liquid level sensor being arranged in the first cavity and being movable in the vertical direction; a buffer is arranged on a path of liquid entering the first cavity, and the buffer is used to increase the damping of the liquid entering the first cavity; The second detection assembly is used to detect the liquid level of the device to be detected.

2. The liquid level detecting device according to claim 1, characterized by The buffer comprises a second mounting section connected with the first mounting section, and the second mounting section has a second cavity in communication with the first cavity and the device to be detected respectively; The second cavity is arranged in a horizontal direction. Alternatively, the second cavity comprises a plurality of first bending sections in communication with each other.

3. The liquid level detecting device according to claim 1, characterized by The buffer comprises a plurality of partitions arranged in the first cavity in the direction of liquid flow, and a plurality of through holes are arranged on the partitions; Furthermore, the device to be detected comprises a tank storing liquid, and the tank comprises a plurality of second bending sections in communication with each other; Furthermore, a plurality of wave prevention plates are arranged in the device to be detected.

4. The liquid level detecting device according to claim 1, characterized by The first detection assembly comprises an inclination sensor connected with the first mounting section; and / or an installation area is arranged on the device to be detected in a vertical direction, and the installation area is used to install the first mounting section.

5. A fuel tank characterized by, The fuel tank comprises the liquid level detection device according to any one of claims 1-4, and the device to be detected is the fuel tank, and the liquid in the device to be detected is fuel; The fuel tank comprises a first shell used to store fuel, the first shell is in communication with a first intermediate container through a first exhaust pipe, the first intermediate container is in communication with an engine through a second exhaust pipe, a pressure stabilizing valve is arranged on the first intermediate container, and a first valve is arranged on the second exhaust pipe; When the engine is working, the pressure stabilizing valve and the first valve are both in an open state; when the engine is in standby, the pressure stabilizing valve and the first valve are both in a closed state.

6. The fuel cabinet of claim 5, wherein, The fuel tank comprises an in-out pipe, both ends of the in-out pipe are in communication with the first shell, a discharge valve is arranged on a discharge end of the in-out pipe, a return valve is arranged on a return end of the in-out pipe, a first conveying pump is arranged on the in-out pipe, and the in-out pipe is connected with the engine through a fuel rail; The fuel rail comprises a second intermediate container in communication with the in-out pipe, the second intermediate container is in communication with the engine through a feeding pipe and a return pipe respectively, and a second conveying pump is arranged on the return pipe.

7. The fuel cabinet of claim 5, wherein, The fuel tank comprises a heat exchange assembly, the heat exchange assembly comprises a heat exchange source, a heat exchange pipe group, and a driving member, the heat exchange pipe group is in contact with fuel in the first shell, and the driving member is used to drive a heat exchange medium to flow in the heat exchange pipe group.

8. The fuel cabinet of claim 7, wherein, The heat exchange pipe group comprises a first heat exchange pipe and a second heat exchange pipe, both of which are in communication with the heat exchange source, the first heat exchange pipe is arranged outside the first shell and is in contact with the fuel in the first shell, the second heat exchange pipe is in communication with the first heat exchange pipe, and a cooler is arranged on the second heat exchange pipe; Alternatively, the heat exchange pipe group comprises a third heat exchange pipe arranged outside the first shell or arranged in the first shell, the driving member is arranged on the third heat exchange pipe, and both ends of the third heat exchange pipe are in communication with the heat exchange source.

9. The fuel cabinet of claim 5, wherein, The fuel tank is arranged on the ship, and the fuel tank is symmetrically arranged with the centerline of the ship body as the symmetric axis. The second detection assembly is located on the centerline of the ship body.

10. The fuel cabinet of claim 5, wherein, The fuel tank is provided with a safety valve and an inspection hole; and / or the fuel tank is provided with a discharge valve in communication with the first shell; and / or the first shell is provided with a charging pipe in communication with the first shell, a first end of the charging pipe extends into the first shell, a second end of the first shell is used for fuel filling, and the second end of the first shell is sequentially provided with a cover plate, a filling valve and a filter along the filling direction.

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