Lift tube air tightness detection device

Abstract

The utility model discloses a riser tube air tightness detection device, relates to the technical field of riser tube detection, and aims to solve the problems of low riser tube detection efficiency and inaccurate detection result caused by long riser tube air tightness detection time. The riser tube air tightness detection device comprises a water tank which is internally provided with a riser tube body; a sealing plug used for sealing one end of the riser tube body is arranged on the side wall of the water tank, a communicating pipe is arranged in the sealing plug in a penetrating mode, one end of the communicating pipe extends into the riser tube body to be communicated with the riser tube body, a one-way valve is installed at the other end of the communicating pipe, the communicating pipe is further communicated with an inflation inlet, and the inflation inlet is communicated with the water tank. The other end of the riser tube body is sleeved with a piston, the end, away from the riser tube body, of the piston extends out of the water tank, and the piston is in threaded connection with the water tank.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of liquid lift pipe detection, and particularly relates to a liquid lift pipe airtightness detection device. BACKGROUND

[0002] Differential pressure casting is to connect the crucible and the mold together through the liquid lift pipe, and a certain pressure is exerted on the alloy liquid through compressed gas, so that the alloy liquid in the crucible enters the mold under the action of the pressure, and the filling process of the alloy liquid is completed, and the alloy liquid in the mold is always under a certain pressure of gas during the solidification process, thereby guaranteeing that the casting has higher density.

[0003] During the whole differential pressure casting process, the airtightness of the liquid lift pipe determines the quality of the finished casting, so it is necessary to detect the airtightness of the liquid lift pipe, and the small cracks and non-dense structure on the surface of the liquid lift pipe cannot be identified by the naked eye. In view of this problem, the Chinese patent with the patent name of liquid lift pipe airtightness detection device and the patent application number of 201821876973.1 is to fill a certain pressure gas into the liquid lift pipe, seal the two ends of the liquid lift pipe by using a rubber plug, place the liquid lift pipe in water, and determine the sealing property of the liquid lift pipe by observing whether bubbles overflow from the surface of the liquid lift pipe.

[0004] However, since the small cracks and non-dense structure on the surface of the liquid lift pipe cannot be identified by the naked eye, the gas leakage process is very slow, and the process of bubble generation, growth and overflow is very slow, and since the leakage process is slow, the generated bubbles are small, the interval between two bubbles is long, and the bubbles have poor continuity, so they are not easy to observe. Therefore, the detection process of the airtightness of the liquid lift pipe in the prior art is long, the detection efficiency of the liquid lift pipe is low, and the detection result is not accurate enough. UTILITY MODEL CONTENTS

[0005] To solve the above problems, that is, the airtightness detection time of the liquid lift pipe is long, the detection efficiency of the liquid lift pipe is low, and the detection result is not accurate enough, the utility model provides a liquid lift pipe airtightness detection device, which comprises a water tank, a liquid lift pipe body arranged in the water tank, a plug arranged on the side wall of the water tank and used for sealing one end of the liquid lift pipe body, a communication pipe arranged in the plug, one end of the communication pipe extending into the liquid lift pipe body and being in communication with the liquid lift pipe body, a one-way valve mounted on the other end of the communication pipe, and a gas inlet in communication with the communication pipe. The other end of the liquid lift pipe body is sleeved with a piston, one end of the piston away from the liquid lift pipe body extends out of the water tank, and the piston is threadedly connected with the water tank.

[0006] By adopting the technical scheme, the two ends of the liquid-lifting tube body can be sealed through the action of the plug and the piston, compressed gas is filled into the liquid-lifting tube body through the inflation port and the communication pipe, the opening pressure of the one-way valve is adjusted, the liquid-lifting tube body is maintained at a certain pressure value, the piston is continuously driven to extend into the liquid-lifting tube body, the space in the liquid-lifting tube body is continuously compressed during the driving process, and the pressure is also increased, the increased pressure causes the one-way valve to open to release pressure, and the increase of the pressure value also accelerates the leakage speed of the tiny cracks on the surface of the liquid-lifting tube body, so that the piston is continuously driven, the speed of bubble generation is accelerated, the bubbles can continuously overflow, and the liquid-lifting tube body is more easily observed, the time for detecting the air tightness of the liquid-lifting tube body is greatly shortened, the detection efficiency of the liquid-lifting tube body is improved, and the detection result is more accurate.

[0007] The utility model discloses further provide that: the plug is made of rubber with elasticity, and is arranged in a tapered shape.

[0008] By adopting the technical scheme, the plug can seal the liquid-lifting tube body better, and further avoid the influence of gas leakage at the plug on the detection.

[0009] The utility model discloses further provide that: the communication pipe is also connected with a barometer.

[0010] By adopting the technical scheme, the barometer can detect the air pressure value in the communication pipe, and the change of the air pressure value in the liquid-lifting tube body can be observed.

[0011] The utility model discloses further provide that: the water tank and the piston screw connection's one side surface still has the screw connection of the ejector rod, and one end of the ejector rod is inserted into the water tank, to be used for the close contact of the liquid-lifting tube body.

[0012] By adopting the technical scheme, the ejector rod can tightly press the liquid-lifting tube body, so that the sealing of the plug is better, and further avoid the influence of gas leakage at the plug on the detection.

[0013] The utility model discloses further provide that: the ejector rod is provided with two, and two the ejector rod about the piston symmetrical setting.

[0014] By adopting the technical scheme, the two ejector rods can tightly press the liquid-lifting tube body more reliably, and avoid the problem of uneven stress.

[0015] The utility model discloses further provide that: the one end of the piston that protrudes the water tank is provided with hand wheel.

[0016] By adopting the technical scheme, the hand wheel can more conveniently rotate the piston, and then drive the piston to extend into the liquid-lifting tube body.

[0017] The utility model discloses further provide: the one end of piston that projects water tank is connected with the driving device for driving the rotation of piston, the driving device below is provided with support platform, the slide groove that is parallel to piston has been opened on the support platform, and the driving device passes through the slide groove with support platform sliding connection.

[0018] Through adopting the above technical scheme, through setting driving device, the piston can be driven to project into the liquid lifting pipe body at uniform speed, and then whether the liquid lifting pipe body has leakage and the position of the leakage point can be determined according to the change of the barometer.

[0019] The utility model discloses further provide: water tank is provided with two support block for supporting the liquid lifting pipe body.

[0020] Through adopting the above technical scheme, the support block can support the liquid lifting pipe body, ensure that the liquid lifting pipe body and the piston can keep parallel and coaxial position.

[0021] The utility model discloses the beneficial effect that:

[0022] 1, through the driving piston, the pressure value in the liquid lifting pipe body can be improved, and then the pressure value that rises can accelerate the leakage amount of crack on the liquid lifting pipe body, accelerate the speed of bubble generation, make bubble can continuously overflow, more easily be observed, greatly shorten the time of liquid lifting pipe body air tightness detection, improve the detection efficiency of liquid lifting pipe body, make the detection result more accurate.

[0023] 2, through setting driving device, the piston can be driven to project into the liquid lifting pipe body at uniform speed, and then whether the liquid lifting pipe body has leakage and the position of the leakage point can be determined according to the change of the barometer. DRAWINGS

[0024] Figure 1 The structure schematic diagram of example 1 is shown.

[0025] Figure 2 The top view of example 1 is shown.

[0026] Figure 3 The section view of A-A direction is shown.

[0027] Figure 4 The structure schematic diagram of example 2 is shown.

[0028] Reference signs: 1, water tank; 11, plug; 12, support block; 13, ejector rod; 131, top block; 2, liquid lift pipe body; 3, communication pipe; 31, one-way valve; 32, inflation port; 33, air pressure gauge; 4, piston; 41, plug head; 42, plug rod; 421, hand wheel; 422, driving device; 5, support table; 51, sliding groove. DETAILED DESCRIPTION

[0029] The preferred embodiments of the present application are described below with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are only used to explain the technical principles of the present application, and are not intended to limit the protection scope of the present application.

[0030] Example 1

[0031] The utility model proposes a kind of liquid lift pipe airtightness detection device, including water tank 1, water tank 1 is provided with liquid lift pipe body 2, liquid lift pipe body 2 is horizontally arranged, the side wall of water tank 1 is adheredly connected with plug 11, plug 11 is made of elastic rubber, and plug 11 is set to taper, the side wall of water tank 1 is adheredly connected with the one end of the large diameter of plug 11, the one end of the small diameter of plug 11 is inserted by one end of liquid lift pipe body 2, to seal the one end of liquid lift pipe body 2.

[0032] Plug 11 is provided with communication pipe 3 in its inside, communication pipe 3 is coaxially arranged with plug 11, one end of communication pipe 3 is inserted into the inside of liquid lift pipe body 2, and is communicated with liquid lift pipe body 2, the other end of communication pipe 3 is arranged outside water tank 1. One-way valve 31 is installed on the one end of communication pipe 3 outside water tank 1, and the opening pressure of one-way valve 31 can be adjusted. Inflation port 32 is also communicated on communication pipe 3 through tee, to fill compressed gas into liquid lift pipe body 2, so that a certain pressure can be maintained in liquid lift pipe body 2, and stop valve is installed on gas outlet, so that inflation port 32 can be closed by stop valve after inflation is completed.

[0033] The other end of liquid lift pipe body 2 is coaxially sleeved with piston 4, plug head 41 of piston 4 is made of elastic rubber, and is also set to taper, plug head 41 is rotationally connected with plug rod 42, plug head 41 is arranged into liquid lift pipe body 2, the one end of plug rod 42 away from liquid lift pipe body 2 is arranged outside water tank 1, outer thread is formed on plug rod 42, plug rod 42 is screw-connected with water tank 1, hand wheel 421 is welded on the one end of plug rod 42 outside water tank 1, to more conveniently rotate plug rod 42. Rotating hand wheel 421 can drive plug rod 42 to move along the length direction of liquid lift pipe body 2, to further push plug head 41 to move.

[0034] Air pressure gauge 33 is also installed on communication pipe 3, and air pressure gauge 33 can detect the air pressure value in liquid lift pipe body 2 through communication pipe 3.

[0035] Two top rods 13 are also threadedly connected to the side surface of the water tank 1 on the side of the threaded connection of the piston 4, the two top rods 13 are symmetrically arranged about the piston 4, one end of the top rod 13 is arranged outside the water tank 1, the other end is arranged inside the water tank 1, and a rubber top block 131 is fixedly connected to the end arranged inside the water tank 1, rotating the top rod 13 can move the top rod 13 towards the liquid lifting pipe body 2, and the top block 131 can abut against the liquid lifting pipe body 2 to tightly push the liquid lifting pipe body 2, making the liquid lifting pipe body 2 and the plug seal more tightly, avoiding leakage at the plug seal 11 to affect the detection. The two top rods 13 are symmetrically arranged about the piston 4, which can make the liquid lifting pipe body 2 be more tightly pushed, avoiding uneven stress and causing the liquid lifting pipe body 2 to be inclined.

[0036] Two support blocks 12 are also arranged in the water tank 1, the support blocks 12 are welded to the bottom of the water tank 1, and an arc-shaped notch matching the liquid lifting pipe body 2 is formed in the support block 12 to support the liquid lifting pipe body 2, ensuring that the liquid lifting pipe body 2 and the piston 4 can keep parallel and coaxial.

[0037] Detection process: first, adjust the one-way valve 31 to the appropriate opening pressure, then fill compressed gas into the liquid lifting pipe body 2 through the inflation port 32, so that the gas pressure value in the liquid lifting pipe body 2 is not greater than the opening pressure of the one-way valve 31.

[0038] Then add water to the water tank 1 so that the water covers the liquid lifting pipe body 2.

[0039] Secondly, rotate the hand wheel 421 to drive the piston 4 to move along the liquid lifting pipe body 2, so that the plug head 41 extends into the liquid lifting pipe body 2 towards the plug seal 11, and in the driving process, the piston 4 will continuously compress the sealing space in the liquid lifting pipe body 2, thereby increasing the gas pressure value in the liquid lifting pipe body 2, when the gas pressure value in the liquid lifting pipe body 2 is greater than or equal to the opening pressure, the one-way valve 31 opens, and the pressure value rises, which also speeds up the leakage speed of the tiny cracks on the surface of the liquid lifting pipe body 2, thereby continuously driving the piston 4, which can speed up the generation of bubbles, so that the bubbles can continuously overflow, making it easier to observe, greatly shortening the time of the liquid lifting pipe body 2 air tightness detection, improving the detection efficiency of the liquid lifting pipe body 2, and making the detection result more accurate.

[0040] Example 2

[0041] The difference between this embodiment and embodiment 1 is that the end of the plug rod 42 extending out of the water tank 1 is coaxially connected with a driving device 422 through a shaft coupling, the driving device 422 is an electric motor for driving the rotation of the plug rod 42, a supporting table 5 is arranged below the driving device 422, the supporting table 5 is fixed on the ground, a sliding groove 51 is formed in the supporting table 5, the sliding groove 51 is parallel to the plug rod 42, and the driving device 422 is slidably connected with the supporting table 5 through the sliding groove 51. When the driving device 422 drives the rotation of the plug rod 42, the plug rod 42 also moves along the direction of the liquid lifting pipe body 2, and the driving device 422 is also driven to move along the sliding groove 51. The driving device 422 can drive the piston 4 to move at a constant speed.

[0042] Detection process: first, adjust the one-way valve 31 to the appropriate opening pressure, then fill the compressed gas into the liquid lifting pipe body 2 through the inflation port 32, so that the gas pressure value in the liquid lifting pipe body 2 is not greater than the opening pressure of the one-way valve 31.

[0043] Then add water to the water tank 1, so that the water covers the liquid lifting pipe body 2.

[0044] Secondly, the driving device 422 is started, the piston 4 is driven to move at a constant speed along the direction of the liquid lifting pipe body 2, the plug head 41 extends into the liquid lifting pipe body 2 in the direction of the sealing plug 11, and the piston 4 continuously compresses the sealed space in the liquid lifting pipe body 2 during the driving process, thereby increasing the gas pressure value in the liquid lifting pipe body 2. When the gas pressure value in the liquid lifting pipe body 2 is greater than or equal to the opening pressure, the one-way valve 31 is opened, and the pressure relief begins. Since the piston 4 is driven to move at a constant speed, the pressure relief of the one-way valve 31 and the compression of the piston 4 can maintain a relative balance, that is, the pressure in the liquid lifting pipe body 2 is constant, and the detection value of the pressure gauge 33 is constant. If the detection value of the pressure gauge 33 suddenly increases during the movement of the piston 4, it means that there is a leakage point in the position passed by the plug head 41. Since the plug head 41 exceeds the leakage point, the leakage point is not connected with the sealed space of the liquid lifting pipe body 2, so the liquid lifting pipe body 2 has less leakage, and the value of the pressure gauge 33 will increase. According to the change of the value of the pressure gauge 33, the position of the leakage point can be roughly determined.

[0045] Meanwhile, the increase of the pressure value also accelerates the leakage speed of the tiny cracks on the surface of the liquid lifting pipe body 2, thereby continuously driving the piston 4, accelerating the generation speed of the bubbles, making the bubbles continuously overflow, and more easily observed, greatly shortening the time of the liquid lifting pipe body 2 air tightness detection, improving the detection efficiency of the liquid lifting pipe body 2, and making the detection result more accurate.

[0046] In summary, the utility model discloses through drive piston 4 can improve the pressure value in the lifting tube body 2, and the pressure value can accelerate the leakage amount of the crack on the lifting tube body 2 of further raising, accelerate the speed of bubble generation, make bubble can continuously overflow, more easily be observed, greatly shorten the time of lifting tube body 2 air tightness detection, improve the detection efficiency of lifting tube body 2, make the detection result more accurate. Through setting drive device 422, make piston 4 can be driven to the lifting tube body 2 in even speed and stretch into, and further can determine the position of leakage point according to the change condition of barometer 33 whether existence leakage on the lifting tube body 2.

[0047] Although the utility model has been described with reference to the preferred embodiments, various modifications can be made to it without departing from the scope of the utility model, and equivalent substitutions can be made to the components therein, in particular, as long as there is no structural conflict, the technical features mentioned in each embodiment can be combined in any way. The utility model is not limited to the specific embodiments disclosed in the text, but includes all technical solutions falling within the scope of the claims.

[0048] In the description of the utility model, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and other terms indicating direction or positional relationship are based on the direction or positional relationship shown in the drawings, which is merely for the convenience of description, and does not indicate or imply that the device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model. In addition, the terms "first", "second", "third" are for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0049] In addition, it also needs to be explained that, in the description of the utility model, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connection" should be understood broadly, for example, can be fixedly connected, can be detachably connected, or integrally connected, can be mechanically connected, or electrically connected, can be directly connected, or indirectly connected through an intermediate medium, can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0050] The term "includes" or any other similar term is intended to cover non-exclusive inclusion, so that the process, article or equipment / device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or also includes the elements inherent in the process, article or equipment / device.

[0051] The technical scheme of the utility model has been described in combination with the preferred embodiments shown in the drawings, but the person skilled in the art can easily understand that the protection scope of the utility model is obviously not limited to these specific embodiments. The person skilled in the art can make equivalent changes or replacements to the related technical features without deviating from the principles of the utility model, and the technical schemes after the changes or replacements will all fall within the protection scope of the utility model.

Claims

1. A riser gas tightness detection device, characterized in that: The utility model provides a water tank (1) is provided with the liquid -lift tube body (2) in it, the side wall of water tank (1) is provided with the sealing plug (11) for sealing one end of the liquid -lift tube body (2), the sealing plug is internally provided with the communicating pipe (3), one end of the communicating pipe (3) extends into the liquid -lift tube body (2) and is communicated with the liquid -lift tube body (2), the other end of the communicating pipe (3) is equipped with the check valve (31), the communicating pipe (3) is also communicated with the inflation port (32), the other end of the liquid -lift tube body (2) is equipped with the piston (4), the piston (4) is away from the one end of the liquid -lift tube body (2) and extends out of the water tank (1) and is screwed with the water tank (1).

2. The riser gas tightness detection apparatus of claim 1, wherein: The sealing plug (11) is made of rubber with elasticity and is conical.

3. The riser gas tightness detection apparatus of claim 1, wherein: The communicating pipe (3) is also communicated with the air pressure gauge (33).

4. The riser gas tightness detection apparatus of claim 1, wherein: The water tank (1) is screwed with the top rod (13) on the side surface of the threaded connection, one end of the top rod (13) extends into the water tank (1) to tighten the liquid -lift tube body (2).

5. The riser gas tightness detection apparatus of claim 4, wherein: The top rod (13) is provided with two, and the two top rods (13) are symmetrically arranged about the piston (4).

6. The riser gas tightness detection apparatus of claim 1, wherein: The end of the piston (4) extending out of the water tank (1) is provided with a hand wheel (421).

7. The riser gas tightness detection apparatus of claim 1, wherein: The end of the piston (4) extending out of the water tank (1) is connected with a driving device (422) for driving the rotation of the piston (4), and a support table (5) is arranged below the driving device (422), the support table (5) is provided with a sliding groove (51) parallel to the piston (4), and the driving device (422) is slidably connected with the support table (5) through the sliding groove (51).

8. The riser gas tightness detection apparatus of claim 1, wherein: The water tank (1) is provided with two support blocks (12) for supporting the liquid -lift tube body (2).

Images