Water tank air tightness detection method and equipment

Abstract

The invention provides a water tank air tightness detection method and equipment, and the method comprises the following steps: S1, plugging all external interfaces of a to-be-detected water tank, and completely immersing the to-be-detected water tank in water; and S2, after standing for a period of time, measuring the buoyancy applied to the water tank, comparing the buoyancy with a preset buoyancy value, if the measured buoyancy is smaller than the preset buoyancy value, determining that the sealing performance is poor, otherwise, determining that the sealing performance is good. According to the scheme, the buoyancy borne by the water tank can be transmitted to the pressure detection element through the second connecting arm, and if the air tightness of the water tank is good, the buoyancy borne by the water tank is large, and the detection value of the pressure detection element is large; if the air tightness of the water tank is poor, the buoyancy borne by the water tank is small, and therefore the detection value of the pressure detection element is small, the air tightness condition of the water tank can be directly judged through the detection value of the pressure detection element, an air supply system does not need to be additionally arranged, the requirement for the detection device is low, and therefore the structure of the detection device is simpler.

Description

Technical Field

[0001] The present invention relates to the technical field of water tank air tightness detection, and in particular to a water tank air tightness detection method and equipment. Background Art

[0002] The water tank, also known as the radiator, is the main component of the trailer cooling system. Its function is to dissipate heat. The cooling water absorbs heat in the water jacket, flows to the radiator, and then circulates back to the water jacket to achieve the purpose of temperature regulation. It is a component of the trailer engine. The trailer water tank is usually welded by splicing metal plates. After welding, the air tightness of the water tank needs to be tested.

[0003] The commonly used methods for air tightness testing are the bubble detection method and the pressure change method. The bubble detection method is to immerse the container in water and observe whether bubbles emerge to determine whether the container is well sealed; the pressure change method is to determine the tightness of the container by measuring the change in the internal pressure of the container. If the pressure change exceeds a certain range, it indicates that the container may be leaking. Both detection methods require the corresponding air supply system, resulting in higher requirements for the air tightness detection device and a more complex structure. Summary of the invention

[0004] Based on the above-mentioned problems existing in the prior art, the present invention aims to solve the technical problem that when using the bubble detection method and the pressure change method in the prior art to detect the air tightness of the water tank, both need to be equipped with a corresponding air supply system, resulting in high requirements for the air tightness detection device and a relatively complex structure of the device.

[0005] The present invention provides a water tank air tightness detection method, which comprises the following steps:

[0006] S1: After all external interfaces of the water tank to be tested are blocked, it is completely immersed in water;

[0007] S2: After standing for a period of time, measure the buoyancy of the water tank and compare it with the preset buoyancy value. If the measured buoyancy is less than the preset buoyancy value, the sealing is poor, otherwise the sealing is good; wherein the preset buoyancy value refers to the buoyancy of a water tank with good sealing when it is completely immersed in water.

[0008] According to an embodiment of the present invention, when the water tank to be inspected is completely immersed in water in step S1, the process further includes:

[0009] The water tank needs to be placed at a certain depth, where the certain depth means that when the water tank is in the water at this depth, the water pressure can exceed the pressure of the air in the water tank; and / or

[0010] An ultrasonic device is used to eliminate the effect of water tension.

[0011] The present invention also provides a water tank air tightness detection device, which comprises a water tank and a robot, wherein the water tank is filled with water, and the robot comprises a fixedly connected clamp and a mechanical arm, wherein the clamp is configured to be able to open and close to clamp or loosen the water tank; the mechanical arm is configured to be able to cooperate with the clamp to move the water tank to be detected into a certain depth of the water tank, and to move the water tank that has been detected out of the water tank;

[0012] The robotic arm includes a first connecting arm, a second connecting arm and a pressure detection element. The first connecting arm and the second connecting arm are movably connected so that the second connecting arm can move in a vertical direction relative to the first connecting arm. One end of the second connecting arm away from the first connecting arm is fixedly connected to the clamp. The pressure detection element is fixedly arranged on the first connecting arm and located above the second connecting arm, so as to detect the buoyancy transmitted through the second connecting arm when the water tank is immersed in water.

[0013] According to an embodiment of the present invention, the first connecting arm is a sleeve with an opening at the bottom, and the inner wall of the opening extends inward to form a stopper; the second connecting arm is a T-shaped rod matching the sleeve.

[0014] According to an embodiment of the present invention, the mechanical arm further comprises an elastic member disposed between the second connecting arm and the pressure detecting element, for buffering the impact force of the second connecting arm on the pressure detecting element.

[0015] According to one embodiment of the present invention, the water tank air tightness detection equipment also includes an ultrasonic device fixedly installed on the side wall of the water tank, the ultrasonic device includes an ultrasonic generator fixedly installed on the outer wall of the water tank and an ultrasonic vibrator fixedly installed on the inner wall of the water tank, wherein the ultrasonic generator is electrically connected to the ultrasonic vibrator.

[0016] According to an embodiment of the present invention, the water tank air tightness detection device further comprises a control module electrically connected to the pressure detection element, and a timing module and an alarm module electrically connected to the control module respectively, wherein a preset immersion time and a preset pressure value are set in the control module;

[0017] When the water tank is immersed in a certain depth, the timing module starts timing. When the preset immersion time is reached, the pressure detection element detects the buoyancy of the water tank transmitted by the second connecting arm and transmits it to the control module. The control module compares the received buoyancy with the preset pressure value and controls the alarm module to give different prompt information according to different comparison results.

[0018] The water tank air tightness detection method and device provided by the present invention have the following beneficial effects:

[0019] In this solution, when the water tank is completely immersed in water for a period of time, the buoyancy of the water tank can be transmitted to the pressure detection element through the second connecting arm. If the air tightness of the water tank is good, the buoyancy it receives is equal to the weight of the water displaced by the entire water tank (the weight of water equivalent to the volume of the water tank), and the detection value of the pressure detection element is larger; if the air tightness of the water tank is poor, water will enter its interior, causing the buoyancy of the water tank to be only the weight of the water displaced by its side walls, so that the detection value of the pressure detection element is smaller. Therefore, the air tightness of the water tank can be directly judged by the detection value of the pressure detection element. Compared with the bubble detection method and the pressure change method in the prior art that require the corresponding air supply system, this solution does not require additional configuration of the air supply system, and has lower requirements on the detection device, thereby making the structure of the detection device more streamlined. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0021] Figure 1 It is a structural schematic diagram of a water tank in the prior art;

[0022] Figure 2 is a cross-sectional view of a water tank air tightness detection device provided by an embodiment of the present invention;

[0023] Figure 3 It is a schematic diagram of the connection structure of the pressure detection element, the control module, the timing module and the alarm module in an embodiment of the present invention;

[0024] Figure markings: 100-water tank; 101-water tank body; 102-top cover; 103-bottom cover; 104-external interface; 1-water tank; 2-robot; 21-gripper; 22-mechanical arm; 221-first connecting arm; 222-second connecting arm; 223-pressure detection element; 224-elastic member; 3-ultrasonic device; 31-ultrasonic generator; 32-ultrasonic vibrator; 4-control module; 5-timing module; 6-alarm module. DETAILED DESCRIPTION

[0025] The following descriptions of the embodiments refer to the attached drawings to illustrate specific embodiments in which the present invention can be implemented.

[0026] The present invention provides a water tank air tightness detection device, the structure of the water tank 100 is as follows Figure 1As shown, it includes a water tank body 101 and a top cover 102 and a bottom cover 103 respectively welded and fixed at both ends of the water tank body 101. The top cover 102 is also fixedly provided with an external interface 104 connected to the inner cavity of the water tank 100. This solution is used to detect the air tightness of the two ends of the water tank body 101 after welding with the top cover 102 and the bottom cover 103. The structure of the water tank air tightness detection equipment is as follows Figure 2 As shown, it comprises a water tank 1 and a robot 2, wherein the water tank 1 is filled with water, and the robot 2 comprises a fixedly connected clamping jaw 21 and a mechanical arm 22, wherein the clamping jaw 21 is configured to be able to open and close, so as to clamp or release the water tank 100; the mechanical arm 22 is configured to be able to cooperate with the clamping jaw 21 to move the water tank 100 to be inspected into a certain depth of the water tank 1, and to move the inspected water tank 100 out of the water tank 1;

[0027] The mechanical arm 22 includes a first connecting arm 221, a second connecting arm 222 and a pressure detection element 223. The first connecting arm 221 and the second connecting arm 222 are movably connected so that the second connecting arm 222 can move in a vertical direction relative to the first connecting arm 221. One end of the second connecting arm 222 away from the first connecting arm 221 is fixedly connected to the clamp 21; the pressure detection element 223 is fixedly arranged on the first connecting arm 221 and located above the second connecting arm 222, so as to detect the buoyancy transmitted through the second connecting arm 222 when the water tank 100 is immersed in water.

[0028] In a water tank air tightness detection device provided by the present invention, after the water tank 100 is completely immersed in water for a period of time, the buoyancy received by the water tank 100 can be transmitted to the pressure detection element 223 through the second connecting arm 222. If the air tightness of the water tank 100 is good, the buoyancy received by it is equal to the weight of the water displaced by the entire water tank 100 (the weight of water equivalent to the volume of the water tank 100), and the detection value of the pressure detection element 223 is relatively large; if the air tightness of the water tank 100 is poor, water will enter its interior, resulting in the buoyancy received by the water tank 100 being only the weight of the water displaced by its side wall, so that the detection value of the pressure detection element 223 is relatively small. Therefore, the air tightness condition of the water tank 100 can be directly judged by the detection value of the pressure detection element 223. Compared with the bubble detection method and the pressure change method in the prior art which require the corresponding air supply system, this solution does not require the additional configuration of the air supply system, and has lower requirements on the detection device, thereby making the structure of the detection device more streamlined.

[0029] Specifically, the first connecting arm 221 is a sleeve with an opening at the bottom, and the inner wall of the opening extends inward to form a stopper; the second connecting arm 222 is a T-shaped rod matching the sleeve.

[0030] Furthermore, the mechanical arm 22 further includes an elastic member 224 disposed between the second connecting arm 222 and the pressure detection element 223, for buffering the impact force of the second connecting arm 222 on the pressure detection element 223. Specifically, the elastic member 224 can be any one of a spring and an elastic protective pad.

[0031] According to an embodiment of the present invention, in order to allow water to enter the interior of the water tank 100 with poor air tightness, when the water tank 100 is completely immersed in water, the water tank 100 needs to be placed at a certain depth, wherein the certain depth means that when the water tank 100 is in the water at this depth, the water pressure can exceed the pressure of the air in the water tank 100; or

[0032] The water tank air tightness detection equipment also includes an ultrasonic device 3 fixedly arranged on the side wall of the water tank 1, and the ultrasonic device 3 includes an ultrasonic generator 31 fixedly arranged on the outer wall of the water tank 1 and an ultrasonic vibrator 32 fixedly arranged on the inner wall of the water tank 1, wherein the ultrasonic generator 31 is electrically connected to the ultrasonic vibrator 32.

[0033] It can be understood that for a water tank 100 with poor air tightness, when the water pressure at the depth exceeds the pressure of the air inside the water tank 100, water can smoothly enter the water tank 100. At the same time, the ultrasonic vibrator 32 can destroy the tension of the water, so that water can enter the water tank 100 through the smaller pores on the surface of the water tank 100, so as to prevent the tension of the water from affecting the detection process. It should be noted that the method of limiting the depth of the water tank 100 in the water and using the ultrasonic device 3 to eliminate the tension of the water can be used either alone or in combination, depending on the specific situation. Of course, the combined use has a better effect.

[0034] Please refer to Figure 3 According to an embodiment of the present invention, in order to realize the automation of the detection process, the water tank air tightness detection device further includes a control module 4 electrically connected to the pressure detection element 223, and a timing module 5 and an alarm module 6 electrically connected to the control module 4, respectively, wherein a preset immersion time and a preset pressure value are set in the control module 4;

[0035] When the water tank 100 is immersed at a certain depth, the timing module 5 starts timing. When the preset immersion time is reached, the pressure detection element 223 detects the buoyancy of the water tank 100 transmitted by the second connecting arm 222, and transmits it to the control module 4. The control module 4 compares the received buoyancy with the preset pressure value, and controls the alarm module 6 to give different prompt information according to different comparison results. Specifically, the alarm module 6 can be an alarm light, which can emit lights of different colors according to different comparison results. For example, when the received buoyancy is equal to the preset pressure value, the alarm light emits green light, and when the received buoyancy is less than the preset pressure value, the alarm light emits red light.

[0036] It should be noted that in actual operation, the influence of the gravity of the water tank 100, the second connecting arm 222 and the clamp 21 on the detection result of the pressure detection element 223 needs to be considered. Therefore, the pressure or buoyancy actually detected by the pressure detection element 223 is the difference between the buoyancy of the water tank 100 and the gravity of the water tank 100, the second connecting arm 222, the clamp 21 and related components.

[0037] The present invention provides a water tank air tightness detection method, which comprises the following steps:

[0038] S1: After all external interfaces of the water tank to be tested are blocked, it is completely immersed in water;

[0039] When the water tank to be tested is completely immersed in water, the water tank needs to be placed at a certain depth, wherein the certain depth means that when the water tank is in water at this depth, the water pressure can exceed the pressure of the air in the water tank; and / or

[0040] An ultrasonic device is used to eliminate the effect of water tension.

[0041] S2: After standing for a period of time, measure the buoyancy of the water tank and compare it with the preset buoyancy value. If the measured buoyancy is less than the preset buoyancy value, the sealing is poor, otherwise the sealing is good; wherein the preset buoyancy value refers to the buoyancy of a water tank with good sealing when it is completely immersed in water.

[0042] In order to facilitate the understanding of this scheme, the following Figure 1-Figure 3 The working principle of the present invention is described in detail:

[0043] First, all external interfaces 104 of the water tank 100 to be tested are completely blocked;

[0044] Next, the robot 2 is started, the robot arm 22 cooperates with the gripper 21 to place the water tank 100 to be tested at a certain depth in the water tank 1, and the ultrasonic device 3 is started;

[0045] After standing for a period of time, if the air tightness of the water tank 100 is good, the buoyancy it is subjected to is relatively large, which is the weight of the water displaced by the entire water tank 100 (the weight of water equivalent to the volume of the water tank 100); if the air tightness of the water tank 100 is poor (there are pores on the side wall of the water tank 100), water will enter the interior of the water tank 100 through the pores and eventually fill the inner cavity of the water tank 100. At this time, the buoyancy the water tank 100 is subjected to is relatively small, which is the weight of the water displaced by the side wall of the water tank 100.

[0046] Next, the pressure detection element 223 detects the buoyancy of the water tank 100 transmitted through the second connecting arm 222 and the elastic member 224, and transmits the detected buoyancy to the control module 4. The control module 4 compares the received buoyancy with the preset pressure value, and controls the alarm module 6 to give different prompt information according to different comparison results.

[0047] In summary, the present invention provides a water tank air tightness detection method and equipment, which can detect the buoyancy of the water tank 100 after it is completely immersed in water, and compare it with the buoyancy value of the water tank 100 with good air tightness to obtain the air tightness condition. Compared with the traditional bubble detection method and pressure change method that require the corresponding air supply system, this solution does not require additional configuration of the air supply system, and has lower requirements for the detection device, thereby making the structure of the detection device more streamlined.

[0048] It should be noted that although the present invention is disclosed as above by specific embodiments, the above embodiments are not intended to limit the present invention. Ordinary technicians in this field can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be based on the scope defined in the claims.

Claims

1. A water tank air tightness detection method, characterized in that: The following steps are involved: S1: After all external interfaces of the water tank to be tested are blocked, it is completely immersed in water; S2: After standing for a period of time, measure the buoyancy of the water tank and compare it with the preset buoyancy value. If the measured buoyancy is less than the preset buoyancy value, the sealing is poor, otherwise the sealing is good; wherein the preset buoyancy value refers to the buoyancy of a water tank with good sealing when it is completely immersed in water.

2. A water tank air tightness detection method according to claim 1, characterized in that: When the water tank to be tested is completely immersed in water in step S1, the method further includes: The water tank needs to be placed at a certain depth, where the certain depth means that when the water tank is in the water at this depth, the water pressure can exceed the pressure of the air in the water tank; and / or An ultrasonic device is used to eliminate the effect of water tension.

3. A water tank air tightness detection device, characterized in that: The invention comprises a water tank (1) and a robot (2), wherein the water tank (1) contains water, and the robot (2) comprises a fixedly connected clamp (21) and a mechanical arm (22), wherein the clamp (21) is configured to be able to open and close, so as to clamp or release a water tank (100); and the mechanical arm (22) is configured to be able to cooperate with the clamp (21) to move a water tank (100) to be inspected into a certain depth of the water tank (1), and to move the inspected water tank (100) out of the water tank (1); The mechanical arm (22) comprises a first connecting arm (221), a second connecting arm (222) and a pressure detection element (223); the first connecting arm (221) and the second connecting arm (222) are movably connected so that the second connecting arm (222) can move in a vertical direction relative to the first connecting arm (221); one end of the second connecting arm (222) away from the first connecting arm (221) is fixedly connected to the clamp (21); the pressure detection element (223) is fixedly arranged on the first connecting arm (221) and located above the second connecting arm (222), and is used for detecting the buoyancy transmitted through the second connecting arm (222) when the water tank (100) is immersed in water.

4. A water tank air tightness detection device according to claim 3, characterized in that: The first connecting arm (221) is a sleeve with an opening at the bottom, the inner wall of the opening extends inward to form a stopper; the second connecting arm (222) is a T-shaped rod matching the sleeve.

5. The water tank air tightness detection device according to claim 3, characterized in that: The mechanical arm (22) further comprises an elastic member (224) arranged between the second connecting arm (222) and the pressure detecting element (223) for buffering the impact force of the second connecting arm (222) on the pressure detecting element (223).

6. The water tank air tightness detection device according to claim 3, characterized in that: It also comprises an ultrasonic device (3) fixedly arranged on the side wall of the water tank (1), the ultrasonic device (3) comprising an ultrasonic generator (31) fixedly arranged on the outer wall of the water tank (1) and an ultrasonic vibrator (32) fixedly arranged on the inner wall of the water tank (1), wherein the ultrasonic generator (31) is electrically connected to the ultrasonic vibrator (32).

7. The water tank air tightness detection device according to claim 3, characterized in that: It also comprises a control module (4) electrically connected to the pressure detection element (223), and a timing module (5) and an alarm module (6) electrically connected to the control module (4), respectively, wherein a preset immersion time and a preset pressure value are set in the control module (4); When the water tank (100) is immersed at a certain depth, the timing module (5) starts timing, and when a preset immersion time is reached, the pressure detection element (223) detects the buoyancy of the water tank (100) transmitted by the second connecting arm (222) and transmits it to the control module (4). The control module (4) compares the received buoyancy with a preset pressure value and controls the alarm module (6) to give different prompt information according to different comparison results.

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