CN110595899A - Pressure testing device and pressure testing method for long-distance pipeline - Google Patents
Pressure testing device and pressure testing method for long-distance pipeline Download PDFInfo
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- CN110595899A CN110595899A CN201910865580.3A CN201910865580A CN110595899A CN 110595899 A CN110595899 A CN 110595899A CN 201910865580 A CN201910865580 A CN 201910865580A CN 110595899 A CN110595899 A CN 110595899A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
- G01N3/10—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces generated by pneumatic or hydraulic pressure
- G01N3/12—Pressure testing
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0016—Tensile or compressive
- G01N2203/0019—Compressive
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/003—Generation of the force
- G01N2203/0042—Pneumatic or hydraulic means
- G01N2203/0048—Hydraulic means
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Abstract
The invention discloses a pressure testing device of a long-distance pipeline, comprising: a pressure test pump; one end of the first pipeline is communicated with the first end of the test tube to be tested, the other end of the first pipeline is communicated with the water outlet end of the pressure test pump, and a first pressure gauge is arranged on the first pipeline; one end of the second pipeline is communicated with the second end of the test tube to be tested, a three-way valve is arranged on the second pipeline, and a second pressure gauge is arranged at one outlet of the three-way valve; the water injection mechanism comprises a connecting hose and a plurality of fixing barrels, the fixing barrels are sleeved on the connecting hose at intervals, the inner wall of each fixing barrel is attached to the outer wall of the connecting hose, an annular air bag is fixed on the side wall of each fixing barrel, and an air inlet pipe, an air exhaust pipe and a water delivery pipe are arranged inside the connecting hose. The invention can fully exhaust and pre-inject water before pressurizing by the pressure test pump, and can effectively drain water by the water injection mechanism after the pressure test process is finished.
Description
Technical Field
The invention relates to the technical field of pipeline construction. More particularly, the invention relates to a pressure testing device and a pressure testing method for a long-distance pipeline.
Background
The pressure test is an important process in pipeline construction and is the key of construction quality. The basic process of pressure testing comprises the following steps: and (3) filling water into the test tube to be tested, gradually pressurizing to the strength test pressure by using a pressure test pump, stabilizing the pressure for 10 minutes, and changing a pointer of a pressure gauge into a test standard without leakage. The existing pressure test method has the problems that the test tube is long, so that sufficient exhaust is difficult to realize before water injection, and water for pressure test is difficult to treat after pressure test is finished. Therefore, it is necessary to design a pressure testing device and a corresponding pressure testing method that can overcome the above-mentioned defects to some extent.
Disclosure of Invention
An object of the present invention is to provide a pressure test apparatus and a pressure test method for a long transport pipe, which is designed with a water injection mechanism capable of sufficiently exhausting and pre-injecting water before pressurizing with a pressure test pump and effectively discharging water after the pressure test process is completed with the water injection mechanism.
To achieve these objects and other advantages in accordance with the purpose of the invention, there is provided a pressure test apparatus for long distance pipeline, comprising:
a pressure test pump;
one end of the first pipeline is communicated with the first end of the test tube to be tested, the other end of the first pipeline is communicated with the water outlet end of the pressure test pump, and a first pressure gauge is arranged on the first pipeline;
one end of the second pipeline is communicated with the second end of the test tube to be tested, a three-way valve is arranged on the second pipeline, and a second pressure gauge is arranged at one outlet of the three-way valve;
the water injection mechanism comprises a connecting hose and a plurality of fixed cylinders, wherein the fixed cylinders are sleeved on the connecting hose at intervals, the inner wall of each fixed cylinder is attached to the outer wall of the connecting hose, an annular air bag is fixed on the side wall of each fixed cylinder, when the annular air bag is in an inflated state, the outer diameter of the annular air bag is slightly larger than the inner diameter of the pipeline to be tested, the side wall of each fixed cylinder is further provided with a water outlet, an air inlet and an air release port, the air inlet and the air release port are both communicated with the annular air bag, an air inlet pipe, an air release pipe and a water delivery pipe are arranged inside the connecting hose, one end of the air inlet pipe penetrates through the side wall of the connecting hose to be communicated with the air inlet, the other end of the air inlet pipe is communicated with an inflator pump, one end of the air release pipe penetrates through the, one end of the water delivery pipe penetrates through the side wall of the connecting hose to be communicated with the water outlet, and the other end of the water delivery pipe is communicated with a water pump.
Preferably, the pressure test device of long defeated pipeline, treat that test tube says both ends by the quick-open blind plate, be provided with the limbers on the quick-open blind plate, be used for with first pipeline or second pipeline intercommunication, still be provided with the installing port on the quick-open blind plate, be used for fixed connection hose.
Preferably, the pressure testing device for the long-distance pipeline further comprises:
a third line in communication with the first line, the third line having a first valve disposed thereon.
Preferably, in the pressure testing device for the long-distance pipeline, a second valve is arranged on the first pipeline between the pressure testing valve and the first pressure gauge.
Preferably, in the pressure test device for the long-distance pipeline, the water outlet is located on the fixed cylinder and far away from the water pump, and the annular air bag is located on the fixed cylinder and near the water pump.
The invention also provides a pressure test method of the long-distance pipeline, and the pressure test device of the long-distance pipeline is used for testing the test pipeline.
Preferably, the pressure test method for the long-distance pipeline comprises the following steps:
step one, coating putty powder on a welding seam of the outer wall of a test tube;
secondly, arranging quick-opening blind plates at two ends of the to-be-tested pipeline, enabling the first pipeline and the second pipeline to be communicated with the first end and the second end of the to-be-tested pipeline through water ports in the quick-opening blind plates respectively, and closing an outlet of a three-way valve connected with a second pressure valve;
step three, opening a quick-opening blind plate at the first end of the test tube to be tested, placing a water injection mechanism into the test tube to be tested, enabling a first annular air bag closest to the second end to be in an inflation state by using an inflator pump, enabling a first water outlet closest to the second end to inject water into the test tube to be tested by using a water pump, after a space between the first annular air bag and the second end is filled, opening an outlet connected with a three-way valve and a second pressure valve, enabling a second annular air bag to be in the inflation state by using the inflator pump, enabling the second water outlet to inject water into the test tube to be tested by using the water pump, deflating the first annular air bag by using a deflation valve, repeating the operations until the last annular air bag is deflated, closing the mounting port, starting the pressure test pump, and continuing to inject water into the test tube to be tested to;
and step four, if the pressure values of the first pressure gauge and the second pressure gauge are unchanged within the set time range, pumping out the water in the pipeline to be tested through the water conveying pipe by using a water pump.
The invention at least comprises the following beneficial effects:
the invention designs a water injection mechanism, which comprises a connecting hose, a plurality of fixed cylinders, annular air bags, an air inlet pipe, an air exhaust pipe and a water delivery pipe, wherein before the pressure is applied by a pressure test pump, the water injection mechanism is firstly placed into a pipeline to be tested, the annular air bags are sequentially opened from the second end to the first end of the pipeline to be tested, and water is sequentially injected in a segmented manner, so that air in the pipeline to be tested can be fully discharged, and the segmented water injection can be combined with smeared putty powder, so that whether each segment has a leakage part can be quickly found out, and the whole pipeline to be tested does not need to be completely injected with water. After the pressure test is finished, the water in the pressure test pipeline can be quickly pumped out by utilizing the water conveying pipe, so that the drainage speed is improved, and the further treatment of the water is facilitated.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic structural diagram of the water injection mechanism of the present invention.
Detailed Description
The present invention is further described in detail below with reference to the attached drawings so that those skilled in the art can implement the invention by referring to the description text.
It will be understood that terms such as "having," "including," and "comprising," as used herein, do not preclude the presence or addition of one or more other elements or groups thereof.
In one embodiment, as shown in fig. 1 and 2, a pressure testing device for long-distance pipeline includes:
pressure testing device of long distance pipeline includes:
a pressure test pump 5;
one end of the first pipeline 2 is communicated with the first end of the test tube 1, the other end of the first pipeline is communicated with the water outlet end of the pressure test pump 5, and a first pressure gauge 201 is arranged on the first pipeline 2;
one end of a second pipeline 3 is communicated with a second end of the test tube 1, a three-way valve 302 is arranged on the second pipeline 3, and a second pressure gauge 301 is arranged at one outlet of the three-way valve 302;
the water injection mechanism comprises a connecting hose 602 and a plurality of fixing cylinders 603, the fixing cylinders 603 are sleeved on the connecting hose 602 at intervals, the inner wall of the fixing cylinder 603 is attached to the outer wall of the connecting hose 602, an annular air bag 601 is fixed on the side wall of the fixing cylinder 603, when the annular air bag 601 is in an inflated state, the outer diameter of the annular air bag 601 is slightly larger than the inner diameter of the test tube 1 to be tested, the side wall of the fixing cylinder 603 is further provided with a water outlet, an air inlet and an air release port, the air inlet and the air release port are both communicated with the annular air bag 601, an air inlet pipe 605, an air release pipe 606 and a water conveying pipe 604 are arranged inside the connecting hose 602, one end of the air inlet pipe 605 penetrates through the side wall of the connecting hose 602 to be communicated with the air inlet, the other end of the air inlet pipe 605 is communicated with an inflation pump, and one end of, the air release pipe 606 is provided with an air release valve, one end of the water pipe 604 penetrates through the side wall of the connecting hose 602 to be communicated with the water outlet, and the other end of the water pipe 604 is communicated with a water pump.
The test tube 1 of the technical scheme is a section of tube, such as 1000 meters, and the pressure test pump 5 adopts the prior art. First pipeline 2 and second pipeline 3 respectively with treat test tube 1 first end and second end intercommunication, for example can connect the intercommunication by the mode of flange, pressure testing pump 5 is through first pipeline 2 to treating test tube 1 interior water injection, be provided with three-way valve 302 on the second pipeline 3, an export of three-way valve 302 is used for setting up second manometer 301, detect and treat test tube 1 second end pressure value, another export of three-way valve 302 is used for exhausting, can also be used for the drainage. The water injection mechanism includes coupling hose 602 and the solid fixed cylinder 603 (being not limited to two in fig. 1) of concatenating on coupling hose 602, the interval of solid fixed cylinder 603 can be confirmed according to waiting to test tube 1, generally 20 ~ 25 meters, gu fixed cylinder 603 external fixation has annular gasbag 601, when annular gasbag 601 is in the state of inflating, can be with waiting to test tube 1 and seal, intake pipe 605, gas release pipe 606 and water pipe 604 set up inside coupling hose 602, intake pipe 605, gas release pipe 606 are used for filling the gassing to the gasbag, the control waits to seal and open of a certain section in test tube 1, water pipe 604 is used for waiting to treat the interior water injection of test tube 1. The fixed cylinder 603 is correspondingly provided with an air inlet, an air outlet and a water outlet.
When using, inside water injection mechanism put into 1 pipeline of waiting to test, the delivery port setting is in the one side of waiting to test 1 second end, and annular gasbag 601 is close to the one side of waiting to test 1 first end. The annular air bags 601 are sequentially inflated from the second end to the first end, water is injected into the test tube 1 through corresponding water outlets after the inflation is finished, the previous annular air bag 601 is deflated after the next annular air bag 601 is inflated, the exhaust and the primary water injection of the pressure test tube are finished after the last annular air bag 601 is deflated, and then the formal pressurization and the pressure test can be carried out by the pressure test pump 5. And after the pressure test is finished, pumping water by using a water injection mechanism left in the pressure test pipeline.
It can be seen that the annular air bag 601 realizes the sectional water injection, can exhaust the test tube 1 more fully, and solves the problem that the test tube 1 is difficult to exhaust due to large span. The water injection mechanism also improves the water discharge speed and is convenient for further treatment of water.
In another technical scheme, the pressure testing device for the long-distance pipeline, treat that 1 both ends of test tube way are by the quick-open blind plate, be provided with the limbers on the quick-open blind plate, be used for with first pipeline 2 or second pipeline 3 intercommunication, still be provided with the installing port on the quick-open blind plate, be used for fixed connection hose 602. Here, a way of communicating the first pipeline 2 and the second pipeline 3 with the pipeline 1 to be tested is provided, that is, quick-opening blind plates are connected at two ends of the pipeline 1 to be tested, any one of the existing quick-opening blind plates can be used as the quick-opening blind holes, and a water through port communicated with the first pipeline 2 or the second pipeline 3 is arranged on the surface of the quick-opening blind plate to fixedly connect with the mounting port of the hose 602. When the pressure test pump 5 is used, the mounting opening is blocked, and when the connecting hose 602 is used for pumping water, the water pipe 604 and the water pump can be connected through the mounting opening. The water passage opening and the mounting opening are shown as two openings at the first end of the test tube in figure 1.
In another technical scheme, the pressure testing device for the long-distance pipeline further comprises:
a third pipeline 4 communicated with the first pipeline 2, the third pipeline 4 being provided with a first valve. Here, the third line 4 is ready for auxiliary water injection of the first line 2 or for draining of the pipe 1 to be tested.
In another technical scheme, in the pressure testing device for the long-distance pipeline, a second valve is arranged at a position between the pressure testing valve and the first pressure gauge 201 on the first pipeline 2. Here, the second valve is used to control the opening degree of the first line 2.
In another technical scheme, in the pressure test device for the long-distance pipeline, the water outlet is located on the fixed cylinder 603 and far away from the water pump, and the annular air bag 601 is located on the fixed cylinder 603 and near to the water pump. Here, the preferred positions of the annular bladder 601 and the water outlet on the fixed cylinder 603 are provided, which facilitate the sealing of the test tube 1 to be tested and the water injection.
The invention is based on the same inventive concept as the pressure test device, and also provides a pressure test method for the long-distance pipeline.
In another technical scheme, the pressure test method for the long-distance pipeline comprises the following steps:
step one, coating putty powder on the welding seam of the outer wall of the test pipeline, wherein if the putty powder on the inner wall is used, rainwater has watermarks, and leakage can be conveniently found;
secondly, arranging quick-opening blind plates at two ends of the to-be-tested pipeline, enabling the first pipeline and the second pipeline to be communicated with the first end and the second end of the to-be-tested pipeline through water ports in the quick-opening blind plates respectively, and closing an outlet of the three-way valve connected with the second pressure valve to enable the other outlet of the three-way valve to serve as a gas outlet;
step three, opening a quick-opening blind plate at the first end of the test tube to be tested, placing a water injection mechanism into the test tube to be tested, enabling a first annular air bag closest to the second end to be in an inflation state by using an inflator pump, enabling a first water outlet closest to the second end to inject water into the test tube to be tested by using a water pump, and opening an outlet connected with a second pressure valve by using a three-way valve after filling a space between the first annular air bag and the second end; in the process, air is expelled from a gas outlet of the three-way valve by injecting water into a space between the first annular air bag and the second end, whether the space is filled with water or not can be judged according to the water flow condition of the gas outlet, if the space is filled with water, the gas outlet is closed, water injection is stopped, and an outlet connected with a second pressure gauge is opened;
enabling the second annular air bag to be in an inflated state by using an inflator pump, enabling the second water outlet to inject water into the to-be-tested pipeline by using a water pump, deflating the first annular air bag by using a deflation valve, repeating the operation until the last annular air bag is deflated, closing the mounting port (dismantling the inflator pump and the water pump and closing the mounting port by using a blanking plug), starting the pressure test pump, and continuously injecting water into the to-be-tested pipeline to the test pressure; in the process, containing spaces are sequentially formed between two adjacent annular air bags, and the containing spaces are sequentially filled with water to expel air from the first end of the test tube to be tested; the condition of the external putty powder can be observed in the process of injecting water into each accommodating space, if the water mark exists, the permeation is indicated, the water injection can be stopped, and the leakage is judged after the water injection of the test tube is finished, so that the waste of water resources is reduced; the second annular air bag is inflated after the space between the first air bag and the second end is filled with water, the third annular air bag is inflated after the accommodating space between the first annular air bag and the second annular air bag is filled with water, and the opening time of the third annular air bag and the subsequent annular air bags is automatically controlled according to the distance between the two adjacent air bags and the water injection flow;
and step four, if the pressure values of the first pressure gauge and the second pressure gauge are unchanged within the set time range, pumping out the water in the pipeline to be tested through the water conveying pipe by using a water pump. The pressure value is generally 1.5MPa, and the set time range is not less than 30 minutes. The water is pumped out by the water delivery pipe of the water injection mechanism left in the pipeline to be tested and is connected with the water pump through the mounting port.
The number of apparatuses and the scale of the process described herein are intended to simplify the description of the present invention. Applications, modifications and variations of the pressure testing device for long-distance pipelines of the present invention will be apparent to those skilled in the art.
While embodiments of the invention have been described above, it is not limited to the applications set forth in the description and the embodiments, which are fully applicable in various fields of endeavor to which the invention pertains, and further modifications may readily be made by those skilled in the art, it being understood that the invention is not limited to the details shown and described herein without departing from the general concept defined by the appended claims and their equivalents.
Claims (7)
1. Pressure testing device of long defeated pipeline, its characterized in that includes:
a pressure test pump;
one end of the first pipeline is communicated with the first end of the test tube to be tested, the other end of the first pipeline is communicated with the water outlet end of the pressure test pump, and a first pressure gauge is arranged on the first pipeline;
one end of the second pipeline is communicated with the second end of the test tube to be tested, a three-way valve is arranged on the second pipeline, and a second pressure gauge is arranged at one outlet of the three-way valve;
the water injection mechanism comprises a connecting hose and a plurality of fixed cylinders, wherein the fixed cylinders are sleeved on the connecting hose at intervals, the inner wall of each fixed cylinder is attached to the outer wall of the connecting hose, an annular air bag is fixed on the side wall of each fixed cylinder, when the annular air bag is in an inflated state, the outer diameter of the annular air bag is slightly larger than the inner diameter of the pipeline to be tested, the side wall of each fixed cylinder is further provided with a water outlet, an air inlet and an air release port, the air inlet and the air release port are both communicated with the annular air bag, an air inlet pipe, an air release pipe and a water delivery pipe are arranged inside the connecting hose, one end of the air inlet pipe penetrates through the side wall of the connecting hose to be communicated with the air inlet, the other end of the air inlet pipe is communicated with an inflator pump, one end of the air release pipe penetrates through the, one end of the water delivery pipe penetrates through the side wall of the connecting hose to be communicated with the water outlet, and the other end of the water delivery pipe is communicated with a water pump.
2. The pressure test device for the long-distance pipeline according to claim 1, wherein two ends of the pipeline to be tested are provided with quick-opening blind plates, the quick-opening blind plates are provided with water through ports for communicating with the first pipeline or the second pipeline, and the quick-opening blind plates are further provided with mounting ports for fixedly connecting hoses.
3. The pressure testing device for the long-distance pipeline according to claim 1, further comprising:
a third line in communication with the first line, the third line having a first valve disposed thereon.
4. The pressure testing device for the long-distance pipeline according to claim 1, wherein a second valve is arranged on the first pipeline at a position between the pressure testing valve and the first pressure gauge.
5. The pressure testing device for the long-distance pipeline as claimed in claim 1, wherein the water outlet is positioned on the fixed cylinder at a position far away from the water pump, and the annular air bag is positioned on the fixed cylinder at a position close to the water pump.
6. The pressure test method for the long-distance pipeline is characterized in that the pressure test device for the long-distance pipeline is used for testing a to-be-tested pipeline according to any one of claims 1 to 5.
7. The pressure test method for the long-distance pipeline as claimed in claim 6, which comprises the following steps:
step one, coating putty powder on a welding seam of the outer wall of a test tube;
secondly, arranging quick-opening blind plates at two ends of the to-be-tested pipeline, enabling the first pipeline and the second pipeline to be communicated with the first end and the second end of the to-be-tested pipeline through water ports in the quick-opening blind plates respectively, and closing an outlet of a three-way valve connected with a second pressure valve;
step three, opening a quick-opening blind plate at the first end of the test tube to be tested, placing a water injection mechanism into the test tube to be tested, enabling a first annular air bag closest to the second end to be in an inflation state by using an inflator pump, enabling a first water outlet closest to the second end to inject water into the test tube to be tested by using a water pump, after a space between the first annular air bag and the second end is filled, opening an outlet connected with a three-way valve and a second pressure valve, enabling a second annular air bag to be in the inflation state by using the inflator pump, enabling the second water outlet to inject water into the test tube to be tested by using the water pump, deflating the first annular air bag by using a deflation valve, repeating the operations until the last annular air bag is deflated, closing the mounting port, starting the pressure test pump, and continuing to inject water into the test tube to be tested to;
and step four, if the pressure values of the first pressure gauge and the second pressure gauge are unchanged within the set time range, pumping out the water in the pipeline to be tested through the water conveying pipe by using a water pump.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910865580.3A CN110595899B (en) | 2019-09-12 | 2019-09-12 | Pressure testing device and pressure testing method for long-distance pipeline |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910865580.3A CN110595899B (en) | 2019-09-12 | 2019-09-12 | Pressure testing device and pressure testing method for long-distance pipeline |
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| CN110595899A true CN110595899A (en) | 2019-12-20 |
| CN110595899B CN110595899B (en) | 2022-04-15 |
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| CN110595899B (en) | 2022-04-15 |
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