CN209878241U - Tightness test device for drain pipe - Google Patents
Tightness test device for drain pipe Download PDFInfo
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- CN209878241U CN209878241U CN201920881883.XU CN201920881883U CN209878241U CN 209878241 U CN209878241 U CN 209878241U CN 201920881883 U CN201920881883 U CN 201920881883U CN 209878241 U CN209878241 U CN 209878241U
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Abstract
The utility model discloses a drain pipe tightness test device, which comprises a pressure air source, a connecting pipe, a gas distribution pipe connected with the pressure air source through the connecting pipe, a second branch pipe part connected with the gas distribution pipe and at least one first branch pipe part; the first branch pipe part comprises a first branch pipe and an air bag, and the first branch pipe is used as a communication pipeline between the inner space of the air bag and the air distribution pipe; the second branch pipe part comprises a second branch pipe and a connecting sleeve pipe with a pipe orifice end, the connecting sleeve pipe is connected with the second branch pipe, and the second branch pipe is used as a communicating pipeline of the inner space of the connecting sleeve pipe and the gas distribution pipe; the pressure gauge for detecting the air pressure in the inner space of the connecting sleeve is further included, and the method is based on the test device. By adopting the device and the method provided by the scheme, the tightness test of the drain pipe can be realized, and the risks of pollution to the finished drain pipe and water immersion loss to a building can be avoided.
Description
Technical Field
The utility model relates to a leak testing equipment technical field especially relates to a drain pipe tightness test device.
Background
According to the existing acceptance regulations of construction engineering, a water filling test is required to be carried out before the drain pipe is concealed so as to determine the tightness of the drain pipe. In the prior art, a water filling test is generally performed on a construction site, for example, after a pipeline is filled, the tightness of a drain pipe is judged by observing the liquid level condition and the water seepage condition of the pipeline and a connector.
SUMMERY OF THE UTILITY MODEL
Is directed to tightness detection or test, the utility model provides a drain pipe tightness test device. By adopting the device and the method provided by the scheme, the tightness test of the drain pipe can be realized, and the risks of pollution to the finished drain pipe and water immersion loss to a building can be avoided.
To the above problem, the utility model provides a drain pipe tightness test device solves the problem through following technical essential: the drain pipe tightness test device comprises a pressure air source, a connecting pipe, a gas distribution pipe connected with the pressure air source through the connecting pipe, a second branch pipe part connected with the gas distribution pipe and at least one first branch pipe part;
the first branch pipe part comprises a first branch pipe and an air bag, and the first branch pipe is used as a communication pipeline between the inner space of the air bag and the air distribution pipe;
the second branch pipe part comprises a second branch pipe and a connecting sleeve pipe with a pipe orifice end, the connecting sleeve pipe is connected with the second branch pipe, and the second branch pipe is used as a communicating pipeline of the inner space of the connecting sleeve pipe and the gas distribution pipe;
the pressure gauge is used for detecting the air pressure in the inner space of the connecting sleeve.
In the prior art, aiming at the tightness test before the drain pipe is hidden, the tightness result is obtained through a water filling test, but during specific construction, the problem of test water source possibly exists in a construction site, so that inconvenience is brought to the tightness test; the water discharge pipe and the building are affected by water due to the discharge of test water and unpredictable leakage problems, which brings inconvenience to subsequent operation and increases recovery procedures of finished product pollution and water leaching loss.
In the scheme, the pressure gas source is used for providing pressure gas, such as compressed air; the connecting pipe is used as a pipeline for introducing pressure gas into the gas distribution pipe; the gas distribution pipe is used as an intermediate connecting piece between the connecting pipe and the first branch pipe part and between the connecting pipe and the second branch pipe part and as a part of a gas circuit and is used for realizing the gas circuit connection between the pressure gas and the gas bag and between the pressure gas and the connecting sleeve. In this way, said pressure gas can be introduced into the airbag, the connecting sleeve, through the respective lines and the tube. When the water draining pipe is used specifically, any one of the pipe orifices of the water draining pipe is connected with the connecting sleeve, and the other pipe orifices are connected with the air bag;
respectively embedding an air bag into the other pipe orifices, introducing pressure gas into the air bags through pressure gas sources, and sealing the corresponding pipe orifices by utilizing expansion of the air bags;
sleeving a connecting sleeve on the obtained pipe orifice, forming a sealing connection relationship between the connecting sleeve and the corresponding pipe orifice, and injecting pressure gas into the inner space of the drain pipe through the connecting sleeve;
and judging the pressure change in the inner space in the pressure maintaining process of the drain pipe by using the pressure gauge. If the pressure in the internal space is maintained for a specified time after the internal space is pressurized to a test set value by a pressure air source, and the pressure drop in the internal space is less than a preset value after the specified time, the tightness of the drain pipe can be judged to meet the engineering requirement; if the pressure drop in the inner space is larger than the preset value after the specified time, after the leakage condition of the device existing in the test device is eliminated, the tightness of the drain pipe can be judged to not meet the engineering requirement, and a specific leakage point position can be obtained by using common leakage detection liquid, such as soapy water, so as to provide guidance for subsequent treatment and finally enable the tightness of the drain pipe to meet the engineering requirement.
By adopting the scheme, the pressure medium required for the tightness test is pressure gas, and the pressure gas can be obtained by providing the pressure gas by a gas cylinder and preparing the pressure gas such as compressed air on site by a site pressurization device, namely by adopting the test device, the pressure gas adopted by the test is easy to obtain compared with a water body; the test device has simple structure, is easy to obtain and is relatively portable; the test device is adopted to complete tightness detection, so that water resources are saved, and the problem of waste water discharge does not exist; the drain pipe or the building can not be influenced by the water body, and when the drain pipe needs to be subjected to tightness remediation construction, the construction efficiency or period can not be influenced by water body residue and water body immersion.
The drain pipe tightness test device comprises the following further technical scheme:
as a person skilled in the art, in order to judge the pressure change, the target object is actually the air pressure in the internal space, and after the connection between the air bag and the corresponding pipe opening of the connecting sleeve and the drain pipe is completed, the air bag and the connecting sleeve need to be supplied with air and distributed with air, so the pressure air source and the connecting pipe should be arranged at close positions, the length of the connecting pipe can meet the requirement of the connection between the outlet of the pressure air source and the inlet of the gas distribution pipe, and the gas distribution pipe is usually in a rigid pipe section form. As a technical scheme for facilitating the connection of a pressure gauge and the distribution of air and obtaining the air supply pressure by an user, the pressure gauge is arranged as follows: and a meter interface of the pressure meter is connected to the gas distributing pipe.
As mentioned above, because the gasbag is in the mouth of pipe of partial or whole embedding drain pipe when being used, inflation shutoff corresponds the mouth of pipe after obtaining pressure gas through the gasbag, if there is stress concentration condition defect or structure such as scar in the mouth of pipe position, the bearing capacity of mouth of pipe position is less than the pipeline section between the drain pipe mouth of pipe in fact, so when specifically using, the atmospheric pressure size in the gasbag only need satisfy in the test process gasbag can the corresponding mouth of pipe of shutoff, preferably adopt the mode that is less than interior pressure in the test process drain pipe, on this basis, for the intercommunication state that makes between gasbag and the gas-distributing pipe can be cut off, set up to: and a cut-off valve is also connected in series on the first branch pipe. Preferably, the following steps are set: the cut-off valve on the first branch pipe is positioned at the position of the first branch pipe close to the gas distribution pipe, so that a user can use the test device conveniently.
This device is when using, especially at the in-process of steady voltage, if there is the leak source itself, also can satisfy the engineering requirement to final result's accuracy and bring influence and trouble, for the realization through pressure source with the inside space pressure value pressurization of drainage pipe to the value of needs after, can with this experimental apparatus local gas circuit with the inside space disconnection to avoid above-mentioned problem as far as possible, set up to: and a cut-off valve is also connected in series on the second branch pipe.
And a cut-off valve is also connected in series on the connecting pipe. Because the pressure air source is arranged at the upstream of the connecting pipe on the air path of the device, the cut-off valve on the connecting pipe can also be used for optimizing the influence of the leakage point of the device on the accuracy of the test result and the test efficiency; through the block valve on the connecting pipe, the on-off control of the gas path between the pressure gas source and the gas distributing pipe can be realized: aiming at the application of the cut-off valve arranged on the first branch pipe, if in the pressurizing process, the pressure in the air bag and the drainage pipe is synchronously increased in the early stage, and after the pressure value reaches the requirement of the air bag on the pipe orifice of the plugging pipe, the cut-off valve on the connecting pipe is closed, and then the corresponding cut-off valve on the first branch pipe is closed, so that the pressure value in the corresponding air bag is the required value, namely the cut-off valve on the connecting pipe can provide a master switch control strategy.
For simplifying this testing device structure as far as possible to make things convenient for this testing device transportation and use, set up to: the pressure air source is an inflator.
For making this test device can adapt to different drain pipe different mouth of pipe positions, set up to: the first branch pipe and the second branch pipe are integrally flexible pipes or local pipe sections are flexible pipe sections.
As a person skilled in the art, the basic requirement for the balloon to inflate and achieve a sealed connection with the spout is that the balloon be flexible. However, the existing implementation mode of bonding the gas barrier layer for woven cloth is difficult to obtain reliable sealing connection, and as an implementation scheme for conveniently obtaining the sealing reliability of the pipe orifice, the implementation scheme is as follows: the air bag and the connecting sleeve are made of rubber, and the air bag further comprises a hoop which is sleeved on the outer side of the pipe orifice end of the connecting sleeve. In the scheme, the reliable sealing performance can be obtained by utilizing the properties of the materials of the air bag and the connecting sleeve. The hoop is used for clamping the connecting sleeve so that sufficient sealing specific pressure is provided between the connecting sleeve and the outer wall of the drainage pipe at the pipe orifice position to realize the sealing effect. The hoop can adopt a steel belt hoop and the like.
For making connecting sleeve can adapt to the mouth of pipe of certain external diameter scope and conveniently establish connecting sleeve cover on corresponding the mouth of pipe, set up to: the pipe orifice end is conical: the pipe diameter of the pipe orifice end close to the end part of the pipe orifice end is larger than that of the pipe orifice end far away from the end part of the pipe orifice end. This scheme is when concrete application, to the mouth of pipe of different external diameters, according to the mouth of pipe external diameter difference, through the degree of depth of adjustment mouth of pipe embedding connecting sleeve, can be so that connecting sleeve and mouth of pipe do not have the fold cooperation in order to guarantee to seal the reliability and conveniently obtain reliable sealing performance.
The scheme also discloses a drain pipe tightness test method, which adopts the test device provided by any item to carry out tightness test on the drain pipe;
in each pipe orifice of the drain pipe, any pipe orifice is taken to be connected with a connecting sleeve, and the other pipe orifices are connected with an air bag;
respectively embedding an air bag into the other pipe orifices, introducing pressure gas into the air bags through pressure gas sources, and sealing the corresponding pipe orifices by utilizing expansion of the air bags;
sleeving a connecting sleeve on the obtained pipe orifice, forming a sealing connection relationship between the connecting sleeve and the corresponding pipe orifice, and injecting pressure gas into the inner space of the drain pipe through the connecting sleeve;
and judging the pressure change in the inner space in the pressure maintaining process of the drain pipe by using the pressure gauge.
The utility model discloses following beneficial effect has:
by adopting the scheme, the pressure medium required for the tightness test is pressure gas, and the pressure gas can be obtained by providing the pressure gas by a gas cylinder and preparing the pressure gas such as compressed air on site by a site pressurization device, namely by adopting the test device, the pressure gas adopted by the test is easy to obtain compared with a water body; the test device has simple structure, is easy to obtain and is relatively portable; the test device is adopted to complete tightness detection, so that water resources are saved, and the problem of waste water discharge does not exist; the drain pipe or the building can not be influenced by the water body, and when the drain pipe needs to be subjected to tightness remediation construction, the construction efficiency or period can not be influenced by water body residue and water body immersion.
Drawings
Fig. 1 is a schematic structural diagram of a specific embodiment of the drain pipe tightness test method of the present invention.
The labels in the figure are respectively: 1. pressure air source, 2, connecting pipe, 3, manometer, 4, shut-off valve, 5, gas distribution pipe, 6, first branch pipe portion, 7, gasbag, 8, first branch pipe, 9, adapter sleeve, 10, second branch pipe, 11, staple bolt, 12, nose end, 13, second branch pipe portion.
Detailed Description
The present invention will be described in further detail with reference to the following examples, but the present invention is not limited to the following examples:
example 1:
as shown in fig. 1, the drain pipe tightness test device comprises a pressure air source 1, a connecting pipe 2, a gas distribution pipe 5 connected with the pressure air source 1 through the connecting pipe 2, a second branch pipe part 13 connected with the gas distribution pipe 5 and at least one first branch pipe part 6;
the first branch pipe part 6 comprises a first branch pipe 8 and an air bag 7, and the first branch pipe 8 is used as a communication pipeline between the inner space of the air bag 7 and the air distribution pipe 5;
the second branch pipe part 13 comprises a second branch pipe 10 and a connecting sleeve 9 with a pipe orifice end 12, the connecting sleeve 9 is connected with the second branch pipe 10, and the second branch pipe 10 is used as a communicating pipeline for the inner space of the connecting sleeve 9 and the gas distributing pipe 5;
the pressure gauge 3 is used for detecting the air pressure in the inner space of the connecting sleeve 9.
In the prior art, aiming at the tightness test before the drain pipe is hidden, the tightness result is obtained through a water filling test, but during specific construction, the problem of test water source possibly exists in a construction site, so that inconvenience is brought to the tightness test; the water discharge pipe and the building are affected by water due to the discharge of test water and unpredictable leakage problems, which brings inconvenience to subsequent operation and increases recovery procedures of finished product pollution and water leaching loss.
In the present embodiment, the pressure gas source 1 is used for providing pressure gas, such as compressed air; the connecting pipe 2 is used as a pipeline for introducing pressure gas into the gas distribution pipe 5; the gas distribution pipe 5 is used as an intermediate connecting piece between the connecting pipe 2 and the first branch pipe part 6 and between the connecting pipe 2 and the second branch pipe part 13, and is used as a part of a gas path for realizing gas path connection between the pressure gas and the air bag 7 and between the pressure gas and the connecting sleeve 9. In this way, said pressure gas can be introduced into the airbag 7, the connecting sleeve 9, through the corresponding lines and pipes. When the water discharging pipe is used specifically, any one of the pipe orifices of the water discharging pipe is connected with the connecting sleeve 9, and the other pipe orifices are connected with the air bag 7;
respectively embedding an air bag 7 into the other pipe orifices, introducing pressure gas into the air bags 7 through the pressure gas source 1, and utilizing the air bags 7 to expand and block the corresponding pipe orifices;
sleeving a connecting sleeve 9 on the obtained pipe orifice, forming a sealing connection relationship between the connecting sleeve 9 and the corresponding pipe orifice, and injecting pressure gas into the inner space of the drain pipe through the connecting sleeve 9;
the pressure change in the inner space in the pressure maintaining process of the drain pipe is judged by using the pressure gauge 3. If the internal space is pressurized to a test set value through the pressure air source 1, the pressure is maintained for a set time, and the pressure drop in the internal space after the set time is less than a preset value, the tightness of the drain pipe can be judged to meet the engineering requirement; if the pressure drop in the inner space is larger than the preset value after the specified time, after the leakage condition of the device existing in the test device is eliminated, the tightness of the drain pipe can be judged to not meet the engineering requirement, and a specific leakage point position can be obtained by using common leakage detection liquid, such as soapy water, so as to provide guidance for subsequent treatment and finally enable the tightness of the drain pipe to meet the engineering requirement.
By adopting the scheme, the pressure medium required for the tightness test is pressure gas, and the pressure gas can be obtained by providing the pressure gas by a gas cylinder and preparing the pressure gas such as compressed air on site by a site pressurization device, namely by adopting the test device, the pressure gas adopted by the test is easy to obtain compared with a water body; the test device has simple structure, is easy to obtain and is relatively portable; the test device is adopted to complete tightness detection, so that water resources are saved, and the problem of waste water discharge does not exist; the drain pipe or the building can not be influenced by the water body, and when the drain pipe needs to be subjected to tightness remediation construction, the construction efficiency or period can not be influenced by water body residue and water body immersion.
Example 2:
in this embodiment, a further limitation is made on the basis of embodiment 1, as shown in fig. 1, as a person skilled in the art, in order to judge the pressure change, the target object is actually the air pressure in the internal space, and after the connection between the air bag 7 and the connecting sleeve 9 and the corresponding pipe openings of the water discharging pipe is completed, the air bag 7 and the connecting sleeve 9 need to be supplied with air and distributed with air, so the pressure air source 1 and the connecting pipe 2 are preferably arranged at close positions, so the length of the connecting pipe 2 can meet the connection between the outlet of the pressure air source 1 and the inlet of the gas distributing pipe 5, and the gas distributing pipe 5 is usually in a rigid pipe section form. As a technical scheme for facilitating the connection of the pressure gauge 3 and the air distribution and obtaining the air supply pressure of a user, the device is arranged as follows: and the meter interface of the pressure meter 3 is connected with the gas distributing pipe 5.
As mentioned above, because gasbag 7 is in the mouth of pipe of partial or whole embedding drain pipe when being used, inflation shutoff corresponds the mouth of pipe after obtaining pressure gas through gasbag 7, if there is stress concentration condition defect or structure such as scar in the mouth of pipe position, the bearing capacity in mouth of pipe position is less than the pipeline section between the drain pipe mouth in fact, so when specifically using, the atmospheric pressure size in gasbag 7 only need satisfy in the test process gasbag 7 can the shutoff corresponding mouth of pipe can, preferably adopt the mode that is less than interior pressure in the test process drain pipe, on this basis, in order to make the communicating state between gasbag 7 and gas-distributing pipe 5 can be cut off, set up as: the first branch pipe 8 is also connected with a cut-off valve 4 in series. Preferably, the following steps are set: the shut-off valve 4 on the first branch pipe 8 is positioned at the position of the first branch pipe 8 close to the gas distribution pipe 5, so that a user can use the test device conveniently.
This device is when using, especially at the in-process of steady voltage, if there is the leak source itself, also can bring influence and trouble to final result's accuracy and whether the accuracy meets the engineering requirement, for the realization through pressure source 1 with the inside space of drainage pipe pressure value pressurization to the value of needs after, can with this experimental apparatus local gas circuit with the inside space disconnection to avoid above-mentioned problem as far as, set up to: the second branch pipe 10 is also connected with a cut-off valve 4 in series.
The connecting pipe 2 is also connected with a cut-off valve 4 in series. Because the pressure air source 1 is arranged at the upstream of the connecting pipe 2 on the air path of the device, the stop valve 4 on the connecting pipe 2 can also be used for optimizing the influence of the leakage point of the device on the accuracy and the efficiency of the test result; through the block valve 4 on the connecting pipe 2, the on-off control of the gas path between the pressure gas source 1 and the gas distributing pipe 5 can be realized: aiming at the application of the cut-off valve 4 arranged on the first branch pipe 8, if in the pressurizing process, the pressure in the air bag 7 and the drainage pipe is synchronously increased in the early stage, after the pressure value reaches the requirement of the air bag 7 for plugging the pipe orifice, the corresponding cut-off valve 4 on the first branch pipe 8 is closed by closing the cut-off valve 4 on the connecting pipe 2, so that the pressure value in the corresponding air bag 7 is the required value, namely the cut-off valve 4 on the connecting pipe 2 can provide a master switch control strategy.
For simplifying this testing device structure as far as possible to make things convenient for this testing device transportation and use, set up to: the pressure air source 1 is an inflator.
For making this test device can adapt to different drain pipe different mouth of pipe positions, set up to: the first branch pipe 8 and the second branch pipe 10 are integrally hose sections or partially hose sections.
As a person skilled in the art, the basic requirement for the balloon 7 to inflate and achieve a sealed connection with the spout is that the balloon 7 is flexible. However, the existing implementation mode of bonding the gas barrier layer for woven cloth is difficult to obtain reliable sealing connection, and as an implementation scheme for conveniently obtaining the sealing reliability of the pipe orifice, the implementation scheme is as follows: the air bag 7 and the connecting sleeve 9 are made of rubber, and the air bag further comprises a hoop 11 which is sleeved outside a pipe orifice end 12 of the connecting sleeve 9. In the scheme, the reliable sealing performance can be obtained by utilizing the properties of the materials of the air bag 7 and the connecting sleeve 9. The anchor ear 11 is used for clamping the connecting sleeve 9, so that the connecting sleeve 9 and the outer wall of the drain pipe at the pipe orifice position have enough sealing specific pressure to realize sealing effect. The hoop 11 can be a steel belt hoop.
For making connecting sleeve 9 can adapt to the mouth of pipe of certain external diameter scope and conveniently overlaps connecting sleeve 9 cover on corresponding the mouth of pipe, sets up to: the pipe orifice end 12 is conical: the pipe diameter of the pipe orifice end 12 close to the end position of the pipe orifice end 12 is larger than that of the pipe orifice end 12 far away from the end position of the pipe orifice end 12. This scheme is when concrete application, to the mouth of pipe of different external diameters, according to the mouth of pipe external diameter difference, through the degree of depth of adjustment mouth of pipe embedding adapter sleeve 9, can be so that adapter sleeve 9 and the no fold cooperation of mouth of pipe are in order to guarantee sealing reliability and conveniently obtain reliable sealing performance.
Example 3:
the present embodiment is further limited based on embodiment 1 or embodiment 2, and the present embodiment discloses a drain pipe tightness test method, which adopts any one of the test devices provided in any of the above embodiments to perform a tightness test on a drain pipe;
in each pipe orifice of the drain pipe, any one pipe orifice is connected with a connecting sleeve 9, and the other pipe orifices are connected with an air bag 7;
respectively embedding an air bag 7 into the other pipe orifices, introducing pressure gas into the air bags 7 through the pressure gas source 1, and utilizing the air bags 7 to expand and block the corresponding pipe orifices;
sleeving a connecting sleeve 9 on the obtained pipe orifice, forming a sealing connection relationship between the connecting sleeve 9 and the corresponding pipe orifice, and injecting pressure gas into the inner space of the drain pipe through the connecting sleeve 9;
the pressure change in the inner space in the pressure maintaining process of the drain pipe is judged by using the pressure gauge 3.
The foregoing is a more detailed description of the present invention, taken in conjunction with the specific preferred embodiments thereof, and it is not intended that the invention be limited to the specific embodiments thereof. To the utility model belongs to the technical field of the ordinary skilled person say, do not deviate from the utility model discloses a other embodiments that reach under the technical scheme all should be contained the utility model discloses a within the scope of protection.
Claims (9)
1. The drain pipe tightness test device is characterized by comprising a pressure air source (1), a connecting pipe (2), a gas distribution pipe (5) connected with the pressure air source (1) through the connecting pipe (2), a second branch pipe part (13) connected to the gas distribution pipe (5) and at least one first branch pipe part (6);
the first branch pipe part (6) comprises a first branch pipe (8) and an air bag (7), and the first branch pipe (8) is used as a communication pipeline between the inner space of the air bag (7) and the air distribution pipe (5);
the second branch pipe part (13) comprises a second branch pipe (10) and a connecting sleeve pipe (9) with a pipe orifice end (12), the connecting sleeve pipe (9) is connected with the second branch pipe (10), and the second branch pipe (10) is used as a communicating pipeline of the inner space of the connecting sleeve pipe (9) and the gas distribution pipe (5);
the pressure gauge (3) is used for detecting the air pressure in the inner space of the connecting sleeve (9).
2. Drain pipe tightness testing device according to claim 1, characterized in that the gauge (3) is interfaced to a gas-distributing pipe (5).
3. Drain pipe tightness testing device according to claim 1, characterized in that a shut-off valve (4) is also connected in series to said first branch pipe (8).
4. Drain pipe tightness testing device according to claim 1, characterized in that a shut-off valve (4) is also connected in series to said second branch pipe (10).
5. Drain pipe tightness test device according to claim 1, characterized in that a shut-off valve (4) is also connected in series to the connecting pipe (2).
6. Drain pipe tightness test device according to claim 1, characterized in that said pressurized air source (1) is an air pump.
7. Drain pipe tightness testing device according to claim 1, characterized in that the first branch pipe (8) and the second branch pipe (10) are hose sections as a whole or as partial pipe sections.
8. The drain pipe tightness test device according to claim 1, wherein the air bag (7) and the connecting sleeve (9) are made of rubber, and further comprises a hoop (11) which is sleeved outside the pipe orifice end (12) of the connecting sleeve (9).
9. Drain pipe tightness testing device according to claim 1, characterized in that said pipe mouth end (12) is conical: the pipe diameter of the pipe orifice end (12) close to the end part of the pipe orifice end (12) is larger than that of the pipe orifice end (12) far away from the end part of the pipe orifice end (12).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920881883.XU CN209878241U (en) | 2019-06-12 | 2019-06-12 | Tightness test device for drain pipe |
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| CN201920881883.XU CN209878241U (en) | 2019-06-12 | 2019-06-12 | Tightness test device for drain pipe |
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| CN209878241U true CN209878241U (en) | 2019-12-31 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110261049A (en) * | 2019-06-12 | 2019-09-20 | 四川省第六建筑有限公司 | Drainpipe leak test device and method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110261049A (en) * | 2019-06-12 | 2019-09-20 | 四川省第六建筑有限公司 | Drainpipe leak test device and method |
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