Tool for testing sealing performance of fuel quantity sensor

Abstract

The utility model discloses a tool for testing the sealing performance of a fuel oil quantity sensor, which relates to the technical field of sealing performance testing tools and comprises a testing vertical frame. The middle part of the test tube is rotationally connected with the test vertical frame through a rotating seat, the rotating seat is provided with a locking structure, and the locking structure can realize position locking of the test tube when the test tube is upright and inverted; the mounting mechanism is connected to the top end of the test tube, the mounting mechanism is used for mounting a to-be-tested fuel quantity sensor, a sensing part of the fuel quantity sensor is arranged in the test tube, and an electrical part of the fuel quantity sensor is exposed and is positioned and locked through the mounting mechanism; the gas source mechanism is installed on the testing vertical frame, and a gas supply pipeline of the gas source mechanism is connected with the installation mechanism and can apply pressure needed by sealing performance testing to an electrical part of the fuel oil quantity sensor. The utility model provides a special tool for testing the sealing performance of a fuel quantity sensor, and solves the problem that the conventional detection method cannot accurately detect the special structure of the sensor.

Description

TECHNICAL FIELD

[0001] The utility model relates to a sealing test tool technical field, more specifically relates to a fuel oil quantity sensor sealing test tool. BACKGROUND

[0002] Fuel quantity sensor (hereinafter referred to as sensor) is the key component in the aircraft fuel system, for accurately measuring the oil quantity in the aircraft on-board tank. Sensor is mainly composed of electrical part (plug, flange plate) and pipe body part (inner tube, reducing pipe, outer tube), wherein the pipe body part is cylindrical. The electrical part of the sensor is installed above the tank cover, must be reliably isolated from aviation kerosene, to prevent fuel from seeping into the electrical part to cause short circuit, corrosion or other faults;The sensor pipe body part is installed in the aircraft fuel tank, for sensing the oil level, and transmitting the oil quantity information to the aircraft fuel management system through the electrical part.

[0003] In the daily maintenance and repair process of the aircraft, in order to ensure the normal work of the sensor, the sealing of the electrical part of the sensor must be checked. The purpose of sealing check is to verify whether the sealing performance of the electrical part of the sensor is reduced due to wear, aging, damage or other factors during long-term use, so as to avoid the safety hazard caused by fuel seepage into the electrical part. However, at present, in the actual maintenance and detection, there is lack of test tool specially for sealing test of fuel quantity sensor. The existing detection method usually relies on simple visual inspection or rough test using general air tightness detection equipment, which has the following disadvantages:

[0004] (1) Insufficient detection accuracy: general air tightness detection equipment cannot accurately detect the special structure of fuel quantity sensor, and it is difficult to find small sealing defects.

[0005] (2) Complex operation: the existing detection method needs complex assembly and debugging, the detection process is tedious and time-consuming.

[0006] (3) Cannot be judged intuitively: in the detection process, whether the sensor electrical part exists air leakage phenomenon cannot be observed intuitively, professional equipment is needed for data analysis, which increases the detection difficulty and cost.

[0007] (4) Cannot simulate actual working condition: the existing detection method cannot simulate the actual working environment of the sensor in the aircraft fuel tank, such as the state of the sensor pipe body part immersed in fuel, which leads to deviation between the detection result and the actual use.

[0008] In view of the above problems, it is particularly important to design a test tool specially used for the sealing test of the fuel quantity sensor. Utility model content

[0009] Therefore, the utility model provides a sealing test tool for fuel quantity sensor, aiming at solving the above technical problems.

[0010] In order to realize the above purpose, the utility model adopts the following technical scheme:

[0011] A sealing test tool for fuel quantity sensor, comprising:

[0012] A test stand;

[0013] A test pipe, the middle part of the test pipe is rotatably connected with the test stand through a rotating seat, the rotating seat has a locking structure, and the locking structure can realize the position locking of the test pipe in the upright position and the inverted position;

[0014] An installation mechanism, the installation mechanism is connected at the top end of the test pipe, the installation mechanism is used for installing the fuel quantity sensor to be tested, the sensing part of the fuel quantity sensor is placed into the test pipe, the electrical part of the fuel quantity sensor is exposed and is locked and positioned through the installation mechanism;

[0015] A gas source mechanism, the gas source mechanism is installed on the test stand, the gas supply pipeline of the gas source mechanism is connected with the installation mechanism, and the gas source mechanism can apply the required pressure for the sealing test to the electrical part of the fuel quantity sensor.

[0016] Through the above technical scheme, the utility model provides a tool specially used for the sealing test of the fuel quantity sensor, and solves the problem that the existing detection method cannot accurately detect the special structure of the sensor. Through the cooperation of the test stand, the test pipe, the installation mechanism and the gas source mechanism, the quick installation and the sealing test of the sensor are realized, the detection process is simplified, and the detection efficiency is improved. The test pipe can be upright and inverted, the sealing of the electrical part of the sensor can be directly judged by observing whether bubbles are generated after being inverted, and the data analysis by means of complex professional equipment is not needed. The test pipe can contain fuel, so that the pipe body of the sensor is immersed in the fuel, the actual working environment of the sensor in the fuel tank of the airplane is simulated, and the accuracy of the detection result is improved.

[0017] Preferably, in the fuel quantity sensor sealing test tool, the rotating seat is rotatably connected to the test stand through a rotating shaft, the rotating seat is fastened to the protruding part of the test tube through bolts, and the locking structure comprises an elastic pin connected to the rotating seat, and the test stand is provided with positioning holes capable of being inserted by the elastic pin.

[0018] Preferably, in the fuel quantity sensor sealing test tool, the positioning holes are located on both sides of the test tube and on the same straight line passing through the rotating shaft.

[0019] Preferably, in the fuel quantity sensor sealing test tool, the mounting mechanism comprises a double-ear top cover threadedly connected to the top end of the test tube in the upright state, the double-ear top cover is provided with a mounting hole for accommodating the fuel quantity sensor, the two side ears of the double-ear top cover are connected with a rotating support, the rotating support is threadedly connected with a pressing rod, and the pressing rod presses the electrical part of the fuel quantity sensor.

[0020] Preferably, in the fuel quantity sensor sealing test tool, one end of the rotating support is provided with a support shaft rotatably connected to one side ear of the double-ear top cover, the other end of the rotating support is provided with a locking shaft, the bottom end of the locking shaft is threadedly connected with a lock nut, the other side ear of the double-ear top cover is provided with a socket corresponding to the locking shaft, and the locking shaft is locked with the ear of the double-ear top cover through the lock nut after being inserted into the socket.

[0021] Preferably, in the fuel quantity sensor sealing test tool, an anti-rotation block is arranged outside the electrical part of the fuel quantity sensor, and the anti-rotation block is limited between the support shaft and the locking shaft.

[0022] Preferably, in the fuel quantity sensor sealing test tool, the top end of the pressing rod is provided with a rotating handle, the bottom end of the pressing rod is provided with a pressing head, the pressing head corresponds to the electrical part of the fuel quantity sensor, and the pressing head is provided with a pneumatic chamber connected with the gas supply pipeline.

[0023] Preferably, in the fuel quantity sensor sealing test tool, the gas source mechanism further comprises a gas source switch, an adjusting knob and a pressure gauge arranged on the upper part of the test stand.

[0024] Preferably, in the fuel quantity sensor sealing test tool, the bottom end of the test tube in the upright state is threadedly connected with a tube protection head, and the tube protection head is threadedly connected with a deflation nut.

[0025] Preferably, in the fuel quantity sensor sealing test tool, the test tube is made of organic glass.

[0026] Via the technical solutions described above, compared with the prior art, the utility model discloses a fuel oil quantity sensor sealing test tool has the following beneficial effects:

[0027] 1. Improve detection accuracy: through the fine design of the mounting mechanism and the air source mechanism, the electrical part of the fuel oil quantity sensor can be subjected to accurate sealing test pressure, and small sealing defects can be effectively found.

[0028] 2. Enhance tool stability: the locking structure of the rotating seat, the double-ear top cover of the mounting mechanism, the rotating support, the locking shaft and the lock nut design ensure the stability and reliability of the sensor during the test process.

[0029] 3. Strong adaptability: the test tube is made of organic glass material, which is transparent and corrosion-resistant, and can adapt to fuel and other test media, and is convenient for observing the test process.

[0030] 4. High safety: through the setting of the air source switch, the adjusting knob and the pressure gauge, the test pressure can be accurately controlled, damage to the sensor caused by excessive pressure can be avoided, and the safety of the test is improved.

[0031] 5. Easy to maintain and clean: the pipe body protection head and the air release nut at the bottom of the test tube are designed to facilitate the discharge of oil after the test is completed, and the cleaning and maintenance of the tool are facilitated.

[0032] 6. Significant economic benefits: the tool is simple to operate and has strong practicality, can effectively reduce the detection cost, improve the detection efficiency, and has significant economic benefits. BRIEF DESCRIPTION OF DRAWINGS

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the utility model or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or the prior art description. Obviously, the drawings in the following description are only embodiments of the utility model, and for those skilled in the art, other drawings can be obtained without creative labor on the premise of providing the drawings.

[0034] Figure 1 The drawing is a structural schematic diagram of the fuel oil quantity sensor sealing test tool provided by the utility model (test tube upright state);

[0035] Figure 2 The drawing is a structural schematic diagram of the test stand provided by the utility model;

[0036] Figure 3 The drawing is a structural schematic diagram of the test tube provided by the utility model;

[0037] Figure 4The drawing is a structural schematic view of the mounting mechanism provided by the utility model;

[0038] Among them:

[0039] 1-test stand;

[0040] 11-positioning hole;

[0041] 2-test tube;

[0042] 21-tube body protection head; 22-gas release nut

[0043] 3-mounting mechanism;

[0044] 31-double ear top cover; 311-insert; 32-rotary support; 33-pressing rod; 34-supporting shaft; 35-locking shaft; 36-lock nut; 37-anti-rotation block; 38-rotary handle; 39-pressing head;

[0045] 4-gas source mechanism;

[0046] 41-gas supply pipeline; 42-gas source switch; 43-adjusting knob; 44-pressure gauge;

[0047] 5-rotary seat;

[0048] 51-elastic pin;

[0049] 6-fuel quantity sensor. DETAILED DESCRIPTION

[0050] 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.

[0051] Referring to the drawings, Figure 1 to the drawings, Figure 4 the utility model embodiment discloses a kind of fuel quantity sensor leakproofness test tool, comprising:

[0052] test stand 1;

[0053] test tube 2, the middle part of test tube 2 is rotatably connected with test stand 1 by rotary seat 5, rotary seat 5 has locking structure, and locking structure can realize the position locking of test tube 2 when being right and upside down;

[0054] The mounting mechanism 3 is connected to the top end of the test tube 2, and is used for mounting the fuel quantity sensor 6 to be tested, the sensing part of the fuel quantity sensor 6 is placed in the test tube 2, and the electrical part of the fuel quantity sensor 6 is exposed and positioned and locked through the mounting mechanism 3.

[0055] The air source mechanism 4 is installed on the test stand 1, the air supply pipeline 41 of the air source mechanism 4 is connected with the mounting mechanism 3, and the air source mechanism 4 can apply the required pressure for the sealing test to the electrical part of the fuel quantity sensor 6.

[0056] Referring to the accompanying drawings Figure 2 The rotating seat 5 is rotatably connected with the test stand 1 through a rotating shaft, and is fastened and connected with the protruding part of the test tube 2 through a bolt, the locking structure comprises an elastic pin 51 connected with the rotating seat 5, and the test stand 1 has a positioning hole 11 capable of being inserted with the elastic pin 51.

[0057] In order to further optimize the above technical scheme, the positioning hole 11 is located on the same straight line passing through the rotating shaft and on both sides of the test tube 2.

[0058] The test tube 2 is turned over by relying on the rotating shaft and the rotating seat 5, and is fixed in the upright and inverted positions by relying on the elastic pin 51 inserted into the positioning hole 11.

[0059] Referring to the accompanying drawings Figure 4 The mounting mechanism 3 comprises a double-eared top cover 31 threadedly connected to the top end of the test tube 2 in the upright state, the double-eared top cover 31 has a mounting hole for accommodating the fuel quantity sensor 6, the two side ears of the double-eared top cover 31 are connected with a rotating support 32, the rotating support 32 is threadedly connected with a pressing rod 33, and the rotating support 32 presses the electrical part of the fuel quantity sensor 6.

[0060] In order to further optimize the above technical scheme, one end of the rotating support 32 has a support shaft 34 rotatably connected with one side ear of the double-eared top cover 31, the other end of the rotating support 32 has a locking shaft 35, the bottom end of the locking shaft 35 is threadedly connected with a lock nut 36, the other side ear of the double-eared top cover 31 has a socket 311 corresponding to the locking shaft 35, and the locking shaft 35 is inserted into the socket 311 and locked with the ear of the double-eared top cover 31 through the lock nut 36. The rotating support 32 is used for supporting and rotating the rotating support 32, facilitating the installation of the fuel quantity sensor 6, and the lock nut 36 is used for fixing the fuel quantity sensor 6 after being installed with the pressing rod 33.

[0061] In order to further optimize the above technical scheme, the outside of the electrical part of the fuel quantity sensor 6 is sleeved with an anti-rotation block 37, and the anti-rotation block 37 is limited between the support shaft 34 and the locking shaft 35.

[0062] In order to further optimize the above technical scheme, the top end of the pressure rod 33 is provided with a rotating handle 38, and the bottom end of the pressure rod 33 is provided with a pressure head 39 corresponding to the electrical part of the fuel oil quantity sensor 6, and the pressure head 39 is provided with a gas pressure chamber connected with a gas supply pipeline 41. The pressure rod 33 is used for fixed connection with the sensor flange and air supply to the electrical part.

[0063] In order to further optimize the above technical scheme, the gas source mechanism 4 further comprises a gas source switch 42, an adjusting knob 43 and a pressure gauge 44 arranged on the upper part of the test stand 1. The adjusting knob 43 is used for controlling the size of the gas source, and the pressure gauge 44 is used for indicating the pressure of the gas source.

[0064] In order to further optimize the above technical scheme, the bottom end of the test tube 2 in the upright state is threadedly connected with a tube protection head 21, and the tube protection head 21 is threadedly connected with a gas releasing nut 22. The gas releasing nut 22 is used for slowly releasing the gas after the test tube 2 is inverted, so that the gas bubbles overflow the liquid surface after being generated.

[0065] In order to further optimize the above technical scheme, the test tube 2 is an organic glass tube. The organic glass tube is used for containing the fuel oil for the air tightness test.

[0066] The air tightness test process steps provided by the embodiment are as follows:

[0067] 1. Add fuel oil into the organic glass tube, and ensure that the oil liquid in the test tube 2 can submerge the sensing part of the fuel oil quantity sensor 6 when the test tube 2 is inverted;

[0068] 2. Remove the upper cover of the fuel oil quantity sensor 6, loosen the double-eared top cover 31, and rotate the rotating support 32 by a certain angle to ensure that the fuel oil quantity sensor 6 can be placed into the organic glass tube;

[0069] 3. Place the fuel oil quantity sensor 6 into the organic glass tube, and use the anti-rotation block 37 for preventing the sensor from shaking to cover the upper part of the fuel oil quantity sensor 6, so as to prevent the fuel oil quantity sensor 6 from shaking randomly;

[0070] 4. Rotate back the rotating support 32, press and fix the fuel oil quantity sensor 6 by using the pressure head 39, and complete the installation of the fuel oil quantity sensor 6;

[0071] 5. Rotate the gas source switch 42, apply the pressure required for the air tightness test to the electrical part of the fuel oil quantity sensor 6, and keep the pressure;

[0072] 6. Pull out the elastic pin 51, rotate the organic glass tube by 180°, and fix the elastic pin 51;

[0073] 7. Loosen the gas releasing nut 22, release the gas in the organic glass tube, keep for 5 minutes, observe whether the gas bubbles are generated in the organic glass tube, and judge whether the air tightness is qualified;

[0074] 8. After the test, rotate the plexiglass tube back to the original vertical position; open the air release nut 22 to release the oil in the tool tube to a suitable container.

[0075] The sealing test tool can effectively isolate the electrical part of the sensor from the oil, and add air to the inside of the sensor through the air source part. The tool is turned over by 180 degrees to check whether there is bubble overflow, and the sealing of the sensor is reliably checked. The tool has the characteristics of simple operation and strong practicability, and has significant economic benefits.

[0076] The various embodiments in the specification are described in a progressive manner, and each embodiment focuses on the difference from other embodiments. The same or similar parts between the various embodiments can be referred to each other. For the device disclosed in the embodiments, since it corresponds to the method disclosed in the embodiments, the description is relatively simple, and the related parts can be referred to the method part.

[0077] The above description of the disclosed embodiments enables a person skilled in the art to implement or use the present application. Various modifications to the embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A fuel level sensor leak test fixture, comprising: Include: Test stand (1); Test tube (2), the middle part of the test tube (2) is rotatably connected with the test stand (1) through a rotating seat (5), the rotating seat (5) has a locking structure, which can realize the position locking of the test tube (2) in the upright and inverted state; Mounting mechanism (3), the mounting mechanism (3) is connected at the top end of the test tube (2), the mounting mechanism (3) is used for mounting the fuel quantity sensor (6) to be tested, the sensing part of the fuel quantity sensor (6) is placed in the test tube (2), and the electrical part of the fuel quantity sensor (6) is exposed and positioned and locked through the mounting mechanism (3); Air source mechanism (4), the air source mechanism (4) is installed on the test stand (1), the air supply pipeline (41) of the air source mechanism (4) is connected with the mounting mechanism (3), and the electrical part of the fuel quantity sensor (6) can be applied to the electrical part of the fuel quantity sensor (6) to apply the pressure required for sealing test.

2. The fuel level sensor leak test tool of claim 1, wherein, The rotating seat (5) is rotatably connected with the test stand (1) through a rotating shaft, the rotating seat (5) is tightly connected with the protruding part of the test tube (2) through a bolt, and the locking structure comprises an elastic pin (51) connected with the rotating seat (5). The test stand (1) has a positioning hole (11) capable of being inserted with the elastic pin (51).

3. The fuel level sensor leak test fixture of claim 2, wherein, The positioning hole (11) is located on both sides of the test tube (2) and on the same straight line through the rotating shaft.

4. The fuel level sensor leak test tool of claim 1, wherein, The mounting mechanism (3) comprises a double-eared top cover (31) screwed on the top end of the test tube (2) in the upright state, the double-eared top cover (31) has a mounting hole for the fuel quantity sensor (6), the two side ears of the double-eared top cover (31) are connected with a rotating support (32), the rotating support (32) is screwed with a pressing rod (33), and the pressing rod (33) presses the electrical part of the fuel quantity sensor (6).

5. The fuel level sensor leak test tool of claim 4, wherein: One end of the rotating support (32) has a supporting shaft (34) rotatably connected with one side ear of the double-eared top cover (31), the other end of the rotating support (32) has a locking shaft (35), the bottom end of the locking shaft (35) is screwed with a lock nut (36), the other side ear of the double-eared top cover (31) has a socket (311) corresponding to the locking shaft (35), and the locking shaft (35) is inserted into the socket (311) and locked with the ear plate of the double-eared top cover (31) through the lock nut (36).

6. The fuel level sensor leak test fixture of claim 5, wherein, The outer side of the electrical part of the fuel quantity sensor (6) is sleeved with an anti-rotation block (37), which is limited between the supporting shaft (34) and the locking shaft (35).

7. The fuel level sensor leak test fixture of claim 6, wherein, The top end of the pressing rod (33) has a rotating handle (38), the bottom end of the pressing rod (33) has a pressure head (39), the pressure head (39) corresponds to the electrical part of the fuel quantity sensor (6), and the pressure head (39) has a gas pressure chamber connected with the air supply pipeline (41).

8. The fuel level sensor leak test fixture of claim 1, wherein, The air source mechanism (4) further comprises an air source switch (42), an adjusting knob (43) and a pressure gauge (44) arranged on the upper part of the test stand (1).

9. The fuel level sensor leak test tool of claim 1, wherein, A pipe body protection head (21) is threadedly connected to the bottom end of the test pipe (2) in the upright state, and a deflation cap (22) is threadedly connected to the pipe body protection head (21).

10. The fuel level sensor leak test tool of claim 1, wherein, The test pipe (2) is a plexiglass pipe.

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