CN112975754B - Cutting apparatus - Google Patents
Cutting apparatus Download PDFInfo
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- CN112975754B CN112975754B CN201911300653.0A CN201911300653A CN112975754B CN 112975754 B CN112975754 B CN 112975754B CN 201911300653 A CN201911300653 A CN 201911300653A CN 112975754 B CN112975754 B CN 112975754B
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- liquid
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C1/00—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods
- B24C1/04—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods for treating only selected parts of a surface, e.g. for carving stone or glass
- B24C1/045—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods for treating only selected parts of a surface, e.g. for carving stone or glass for cutting
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C3/00—Abrasive blasting machines or devices; Plants
- B24C3/02—Abrasive blasting machines or devices; Plants characterised by the arrangement of the component assemblies with respect to each other
- B24C3/04—Abrasive blasting machines or devices; Plants characterised by the arrangement of the component assemblies with respect to each other stationary
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C7/00—Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts
- B24C7/0007—Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts the abrasive material being fed in a liquid carrier
- B24C7/0015—Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts the abrasive material being fed in a liquid carrier with control of feed parameters, e.g. feed rate of abrasive material or carrier
- B24C7/0023—Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts the abrasive material being fed in a liquid carrier with control of feed parameters, e.g. feed rate of abrasive material or carrier of feed pressure
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C9/00—Appurtenances of abrasive blasting machines or devices, e.g. working chambers, arrangements for handling used abrasive material
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Auxiliary Devices For Machine Tools (AREA)
Abstract
The application discloses cutting equipment, which belongs to the technical field of oil and gas conveying pipeline cutting, and comprises a liquid supply device, a supercharging device, a cutting liquid mixing tank body and a cutting gun, wherein a feed inlet is arranged on the cutting liquid mixing tank body, and a sealing valve is arranged on the feed inlet. Firstly, filling abrasive materials into the cutting fluid mixing tank body through a feed inlet, and sealing the feed inlet. And then the pressurizing device is used for pressurizing the liquid provided by the liquid supply device to the target pressure and delivering the liquid to the cutting liquid mixing tank body. And (3) fully mixing the liquid with the abrasive in the cutting liquid mixing tank body to obtain the cutting liquid, and finally outputting the cutting liquid through a cutting gun. Air is not introduced in the whole process, so that the situation that the air and oil gas in a pipeline to be cut are mixed to reach an explosion limit under the action of static accumulation to cause danger is avoided.
Description
Technical Field
The application relates to the technical field of oil and gas conveying pipeline cutting, in particular to cutting equipment.
Background
In the oil and gas conveying pipeline cutting technology, flame cutting and mechanical cutting methods are generally adopted to cut the oil and gas conveying pipeline. The hydraulic cutting method is used for cutting the in-service oil and gas conveying pipeline in the oil and gas environment for the first time. The cutting device used for hydraulic cutting comprises a booster pump, a cutting gun and a grinding material tank, wherein the booster pump is connected with the cutting gun through a high-pressure water pipe, and the grinding material tank is arranged above the cutting gun and is connected with the cutting gun through a feeding pipeline. When pipeline cutting is carried out, the booster pump pressurizes low-pressure water, and the high-pressure water that will obtain is carried to the cutting rifle through high-pressure water pipe, and the abrasive material in the abrasive tank receives gravity action, gets into the cutting rifle through the charging pipeline, and high-pressure water mixes together with the abrasive material, forms high-pressure mixed flow, sprays from the cutting rifle and goes out, can realize the hydraulic cutting to oil gas pipeline.
In the process of implementing the present application, the inventors found that there are at least the following problems in the related art:
The abrasive enters the cutting gun and is mixed with high-pressure water, so that air is easily brought into the high-pressure mixed flow. Meanwhile, in the process of cutting an oil and gas conveying pipeline, abrasive materials in the high-pressure mixed flow can continuously impact the wall surface of the pipeline and rub against the wall surface of the pipeline, so that static electricity is easily generated on the wall surface of the pipeline, and under the action of static electricity accumulation, air and oil gas existing in the high-pressure mixed flow are easily mixed to reach an explosion limit, so that combustion and explosion of the oil and gas are caused, and danger is caused.
Disclosure of Invention
In view of the above, the embodiment of the application provides a cutting device, which can prevent oil gas combustion explosion caused by mixing air in cutting fluid. The technical scheme is as follows:
The embodiment of the application provides cutting equipment, which comprises a liquid supply device, a pressurizing device, a cutting liquid mixing tank body and a cutting gun, wherein:
a feed inlet is arranged on the cutting fluid mixing tank body, and a sealing valve is arranged on the feed inlet;
The liquid supply device is connected with the pressurizing device through a first pipeline, the pressurizing device is connected with the cutting liquid mixing tank body through a second pipeline, and the cutting liquid mixing tank body is connected with the cutting gun through a third pipeline;
And the pressurizing device is used for inputting liquid with the pressure not lower than the target pressure into the cutting fluid mixing tank body through the second pipeline after the cutting fluid mixing tank body is filled with the abrasive material for sealing, so that the abrasive material in the cutting fluid mixing tank body is mixed with the liquid to obtain cutting fluid, and the cutting fluid is input into the cutting gun through the third pipeline.
Optionally, a filter is arranged in the liquid supply device, and the filter is used for filtering impurities in the liquid.
Optionally, the inlet of the pressurizing device is connected with the first pipeline through a one-way valve, and the one-way valve is used for controlling the liquid to flow from the first pipeline to the pressurizing device in a one-way;
the liquid outlet of the pressurizing device is connected with the second pipeline through a pressure relief valve, the pressure relief valve is used for maintaining the pressure of liquid in the second pipeline to be lower than a pressure threshold, and the pressure threshold is larger than the target pressure.
Optionally, a pressure gauge is installed between the pressure release valve and the second pipeline.
Optionally, the cutting fluid mixing tank body is provided with a fluid inlet pipe fitting and a fluid outlet pipe fitting;
the liquid inlet pipe fitting comprises a liquid inlet, a tank inlet and a first liquid outlet, the liquid inlet is communicated with the tank inlet, the liquid inlet is connected with the second pipeline, and a control valve is arranged at the first liquid outlet;
The liquid outlet pipe fitting comprises a tank outlet and a second liquid outlet which are communicated with each other, and the second liquid outlet is connected with the third pipeline;
the tank inlet and the tank outlet are respectively communicated with the cutting fluid mixing tank.
Optionally, the control valve is configured to:
When the pressure of the liquid flowing into the liquid inlet pipe fitting is lower than the target pressure, the liquid inlet is communicated with the first liquid outlet, so that the liquid flows out of the first liquid outlet;
When the pressure of the liquid flowing into the liquid inlet pipe fitting is not lower than the target pressure, the communication between the liquid inlet and the first liquid outlet is disconnected, so that the liquid enters the cutting liquid mixing tank body from the tank inlet.
Optionally, a fourth pipeline is installed at the first liquid outlet, and the fourth pipeline is used for guiding out the liquid which flows into the liquid inlet pipe fitting and has the pressure lower than the target pressure.
Optionally, a pipe assembly is arranged on the cutting fluid mixing tank body, and the pipe assembly comprises a fluid inlet part and a fluid outlet part;
the liquid inlet part comprises a liquid inlet and a tank inlet which are communicated with each other, and the liquid inlet is connected with the second pipeline;
the liquid outlet part comprises a tank outlet and a liquid outlet which are communicated with each other, and the liquid outlet is connected with the third pipeline;
and a control valve is arranged between the first liquid outlet and the second liquid inlet, and the tank inlet and the tank outlet are respectively communicated with the cutting liquid mixing tank.
Optionally, the control valve is configured to:
when the pressure of the liquid flowing into the pipe fitting assembly is lower than the target pressure, the liquid inlet part and the liquid outlet part are communicated, so that the liquid flows out from the liquid outlet;
When the pressure of the liquid flowing into the pipe fitting assembly is not lower than the target pressure, the communication between the liquid inlet part and the liquid outlet part is disconnected, so that the liquid enters the cutting liquid mixing tank body from the tank inlet.
Optionally, the cutting device further comprises a power supply device and a rack, the power supply device is electrically connected with the pressurizing device, and the liquid supply device, the power supply device and the pressurizing device are all installed on the rack.
The technical scheme provided by the embodiment of the application at least can comprise the following beneficial effects:
In the embodiment of the application, the cutting equipment comprises a liquid supply device, a supercharging device, a cutting liquid mixing tank body and a cutting gun, wherein a feed inlet is arranged on the cutting liquid mixing tank body, and a sealing valve is arranged on the feed inlet. In the application of the cutting device, a technician can fill the cutting fluid mixing tank body with abrasive materials through the feeding hole, and the air in the cutting fluid mixing tank body can be discharged in the process. Then, the feed inlet is closed by a sealing valve, and the cutting fluid mixing tank body is sealed to prevent air from entering. And then, conveying the liquid with the pressure not lower than the target pressure to the cutting fluid mixing tank body by using the pressurizing device, so that the liquid and the abrasive are fully mixed in the sealed cutting fluid mixing tank body. And finally, conveying the mixed cutting fluid to a cutting gun for pipeline cutting operation. Therefore, air is not introduced in the process, and further, the air is prevented from entering the pipeline to be cut, and is mixed with oil gas in the pipeline to reach an explosion limit under the action of static electricity accumulation, so that combustion and explosion of the oil gas are caused, dangerous conditions are caused, and the safety of pipeline cutting can be improved.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application as claimed.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural view of a cutting apparatus according to an embodiment of the present application;
Fig. 2 is a schematic structural diagram of a cutting fluid mixing tank according to an embodiment of the present application;
FIG. 3 is a schematic view of another cutting fluid mixing tank according to an embodiment of the present application;
FIG. 4 is a schematic structural view of a cutting fluid mixing tank with a tank inlet valve and a tank outlet valve according to an embodiment of the present application;
fig. 5 is a schematic structural diagram of another cutting fluid mixing tank with a tank inlet valve and a tank outlet valve according to an embodiment of the present application.
Reference numerals in the drawings denote:
1-a liquid supply device,
2-Supercharging device, 21-one-way valve, 22-pressure release valve, 23-pressure gauge,
3-Cutting fluid mixing tank body, 31-charging port, 32-sealing valve, 33 a-fluid inlet pipe fitting, 33 b-fluid inlet part, 34 a-fluid outlet pipe fitting, 34 b-fluid outlet part, 35-control valve, 36-fluid inlet valve, 37-fluid outlet valve, 38-pipe fitting assembly, 39-control spanner, 331-fluid inlet port, 332-fluid inlet port, 333-first fluid outlet port, 341 a-second fluid outlet port, 341 b-fluid outlet port, 342-fluid outlet port,
4-A first pipeline, which is connected with the first pipeline,
5-A second pipeline for the liquid to flow through,
6-A third pipeline for the pipeline to be connected,
7-A fourth pipeline, which is connected with the first pipeline,
8-A power supply device,
9-A frame.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present application more apparent, the embodiments of the present application will be described in further detail with reference to the accompanying drawings.
In the oil and gas conveying pipeline cutting technology, flame cutting and mechanical cutting methods are generally adopted to cut the oil and gas conveying pipeline. The hydraulic cutting method is used for cutting the in-service oil and gas conveying pipeline in the oil and gas environment for the first time. The cutting device used for hydraulic cutting comprises a booster pump, a cutting gun and a grinding tank. When pipeline cutting is carried out, the booster pump pressurizes low-pressure water, and the high-pressure water that will obtain is carried to the cutting rifle through high-pressure water pipe, and the abrasive material in the abrasive material jar gets into the cutting rifle through charging pipeline, and high-pressure water mixes together with the abrasive material, forms high-pressure mixed flow, sprays from the cutting rifle and goes out, can realize the hydraulic cutting to oil gas pipeline.
But the abrasive materials are easy to bring air into the high-pressure mixed flow in the process of mixing the cutting gun with the high-pressure water. Meanwhile, in the process of cutting the oil and gas conveying pipeline, the abrasive in the high-pressure mixed flow can continuously impact the wall surface of the pipeline and rub with the wall surface of the pipeline. Thus, static electricity is easy to generate on the wall surface of the pipeline, and under the action of static electricity accumulation, air and oil gas existing in high-pressure mixed flow are easy to be mixed to reach the explosion limit, so that the combustion and explosion of the oil gas are caused, and danger is caused. The present application provides a cutting apparatus capable of solving the above-described problems.
Fig. 1 is a schematic structural diagram of a cutting apparatus according to an embodiment of the present application, referring to fig. 1, the cutting apparatus includes a liquid supply device 1, a pressurizing device 2, a cutting liquid mixing tank 3, and a cutting gun (not shown in the figure), where the liquid supply device 1 is connected to the pressurizing device 2 through a first pipeline 4, the pressurizing device 2 is connected to the cutting liquid mixing tank 3 through a second pipeline 5, and the cutting liquid mixing tank 3 is connected to the cutting gun through a third pipeline 6.
The cutting fluid mixing tank 3 is used for providing a space for mixing the abrasive and the liquid, and the cutting gun is used for finally outputting the cutting fluid.
The value of the target pressure may be determined according to the pressure required to enable the cutting fluid to be used for cutting, and may be 70MPa, for example. At this target pressure, the liquid can enter the cutting fluid mixing tank 3 to be sufficiently mixed with the abrasive, and the resulting cutting fluid can be used for cutting.
For convenience of description, in this embodiment, a liquid having a pressure lower than the target pressure is referred to as a low-pressure liquid, and a liquid having a pressure not lower than the target pressure is referred to as a high-pressure liquid. For example, the pressure of the liquid output from the pressurizing device 2 is low pressure liquid when the pressure is less than 70MPa, and high pressure liquid when the pressure is greater than or equal to 70 MPa.
The liquid in the liquid supply device 1 may be water, and this embodiment is exemplified by water.
In practice, the liquid supply device 1 may be mounted above the pressurizing device 2, and the outlet of the liquid supply device 1 may be provided at the bottom of the liquid supply device 1, so that the liquid in the liquid supply device 1 can naturally flow into the pressurizing device 2 under the action of gravity.
When the cutting fluid mixing tank is used, a technician can fill the cutting fluid mixing tank 3 with abrasive through the feed inlet 31 on the cutting fluid mixing tank 3, close the feed inlet 31 through the sealing valve 32, then start the pressurizing device 2, enable the pressurizing device 2 to input high-pressure liquid into the cutting fluid mixing tank 3, mix the liquid and the abrasive in the cutting fluid mixing tank 3 to obtain cutting fluid, and finally output through the cutting gun.
Based on the structure, the liquid supply device 1, the supercharging device 2, the cutting liquid mixing tank 3 and the cutting gun are connected in sequence. In use, a technician may fill the cutting fluid mixing tank 3 with abrasive through the feed port 31, discharge air from the cutting fluid mixing tank 3, and close the feed port 31 with the sealing valve 32. Then, the pressurizing device 2 is started again, so that the liquid enters the cutting fluid mixing tank 3 after being pressurized to the target pressure by the pressurizing device 2, and is fully mixed with the abrasive therein, so that the cutting fluid is obtained, and finally, the cutting fluid is output through the cutting gun. It can be seen that no air is introduced, either during the addition of the abrasive or during the mixing of the abrasive with the liquid, or during the feeding of the resulting cutting fluid into the cutting gun. Therefore, the cutting fluid output by the cutting gun cannot be mixed with air, and the situation that the air and oil gas in a pipeline to be cut are mixed to reach an explosion limit under the action of static accumulation to cause danger is avoided.
Alternatively, to ensure safe operation of the supercharging device 2, the inlet of the supercharging device 2 may be connected to the first line 4 via a one-way valve 21 and the outlet of the supercharging device 2 may be connected to the second line 5 via a pressure relief valve 22.
The check valve 21 is used for controlling the liquid to flow from the first pipeline 4 to the supercharging device 2 in a one-way manner, so that the situation that the liquid flows back into the first pipeline 4 from the supercharging device 2 due to higher pressure of the liquid in the supercharging device 2 when the supercharging device 2 works is avoided.
The relief valve 22 is used to maintain the liquid pressure in the second line 5 below a pressure threshold value, which is greater than the target pressure.
In practice, the pressure threshold of the pressure relief valve 22 may be preset by a technician based on process requirements. When the pressure of the liquid in the pressurizing device 2 exceeds a preset pressure threshold, the pressure release valve 22 is opened to release the pressure of the liquid in the second pipeline 5 to a level lower than the pressure threshold. In this way, the pressure of the liquid output by the pressurizing device 2 into the second pipeline 5 is ensured not to be too high, and the dangerous situation caused by the too high pressure of the liquid output by the pressurizing device 2 is avoided.
Optionally, in order to monitor the pressure of the liquid delivered to the cutting fluid mixing tank 3, a pressure gauge 23 may be installed between the pressure relief valve 22 and the second line 5 for monitoring the pressure condition of the liquid in the second line 5.
In general, the distance between the pressurizing device 2 and the cutting fluid mixing tank 3 is relatively short, and the second pipeline 5 is relatively short, so that the pressure of the liquid at the outlet of the pressure release valve 22 is substantially the same as the pressure of the liquid delivered to the cutting fluid mixing tank 3, and the indication of the pressure gauge 23 can represent the pressure of the liquid delivered to the cutting fluid mixing tank 3, so that the pressure of the liquid delivered to the cutting fluid mixing tank 3 can be monitored.
Above-mentioned supercharging device 2 can link to each other with cutting fluid mixing tank 3 through second pipeline 5, and the structure of the junction of second pipeline 5 and cutting fluid mixing tank 3 can make low pressure liquid not get into cutting fluid mixing tank 3, and makes high pressure liquid get into cutting fluid mixing tank 3, and specific realization structure can be:
Referring to fig. 2, the cutting fluid mixing tank 3 may be provided with a fluid inlet pipe 33a and a fluid outlet pipe 34a, the fluid inlet pipe 33a including a fluid inlet 331, a fluid inlet 332 and a first fluid outlet 333, and the fluid outlet pipe 34a including a fluid outlet 342 and a second fluid outlet 341a which are communicated with each other.
The tank inlet 332 and the tank outlet 342 are respectively communicated with the cutting fluid mixing tank 3, the liquid output from the pressurizing device 2 can enter the cutting fluid mixing tank 3 from the tank inlet 332, and the cutting fluid obtained by fully mixing the abrasive and the liquid can be discharged from the tank outlet 342 and enter the cutting gun.
The first liquid outlet 333 may be provided with a control valve 35, and when the control valve 35 is opened, the liquid inlet 331 is communicated with the first liquid outlet 333; when the control valve 35 is closed, the communication between the liquid inlet 331 and the first liquid outlet 333 is disconnected, and the liquid inlet 331 and the tank inlet 332 may be kept in communication, and the tank outlet 342 and the second liquid outlet 341a may be kept in communication.
The liquid inlet 331 is connected with the second pipeline 5, realizes that supercharging device 2 links to each other with cutting fluid mixing tank 3, and the second liquid outlet 341a links to each other with the third pipeline 6, realizes that cutting fluid mixing tank 3 links to each other with the cutting rifle.
In practice, the pressurizing device 2 pressurizes the liquid and delivers the liquid to the cutting fluid mixing tank 3 through the second line 5, and the pressure of the liquid is gradually increased until the target pressure is reached. Before the pressure of the liquid reaches the target pressure, the control valve 35 is opened, the liquid inlet 331 is communicated with the first liquid outlet 333, and at this time, the pressure of the liquid entering the liquid inlet pipe 33a is insufficient to support the liquid to enter the cutting liquid mixing tank 3, so that the low-pressure liquid can directly flow out from the first liquid outlet 333.
When the pressure of the liquid reaches the target pressure, the control valve 35 is closed, and the communication between the liquid inlet 331 and the first liquid outlet 333 is disconnected, at this time, the pressure of the liquid entering the liquid inlet pipe 33a is enough to support the liquid entering the cutting liquid mixing tank 3. The high-pressure liquid enters the cutting fluid mixing tank 3 from the tank inlet 332 and is fully mixed with the abrasive therein, and the obtained cutting fluid is discharged from the liquid outlet pipe 34a and finally output from the cutting gun. In this way, the control of the liquid in and out of the cutting liquid mixing tank 3 is achieved through the liquid inlet pipe 33a, the liquid outlet pipe 34a and the control valve 35.
Optionally, in order to collect the low-pressure liquid flowing out from the first liquid outlet 333 more conveniently, as shown in fig. 2, a fourth pipeline 7 may be installed at the first liquid outlet 333, and in order to recycle the liquid more conveniently, the fourth pipeline 7 may be connected to the liquid supply device 1, so that the low-pressure liquid directly flows back into the liquid supply device 1.
In order to control the low-pressure liquid not to enter the cutting fluid mixing tank 3 but to make the high-pressure liquid enter the cutting fluid mixing tank 3, the structure of the junction between the second pipeline 5 and the cutting fluid mixing tank 3 may be:
Referring to fig. 3, the cutting fluid mixing tank 3 may be provided with a pipe assembly 38, where the pipe assembly 38 includes a fluid inlet 33b and a fluid outlet 34b, the fluid inlet 33b includes a fluid inlet 331 and a fluid inlet 332 that are in communication with each other, and the fluid outlet 34b includes a fluid outlet 342 and a fluid outlet 341b that are in communication with each other.
The tank inlet 332 and the tank outlet 342 are respectively communicated with the cutting fluid mixing tank 3, the liquid output from the pressurizing device 2 can enter the cutting fluid mixing tank 3 from the tank inlet 332, and the cutting fluid obtained by fully mixing the abrasive and the liquid can be discharged from the tank outlet 342 and enter the cutting gun.
A control valve 35 is arranged between the liquid inlet part 33b and the liquid outlet part 34b, and when the control valve 35 is opened, the liquid inlet part 33b is communicated with the liquid outlet part 34 b; when the control valve 35 is closed, the communication between the liquid inlet portion 33b and the liquid outlet portion 34b is disconnected, and the liquid inlet 331 and the tank inlet 332 may be kept in communication, and the tank outlet 342 and the liquid outlet 341b may be kept in communication.
The liquid inlet 331 is connected with the second pipeline 5, realizes that supercharging device 2 links to each other with cutting fluid mixing tank 3, and the liquid outlet 341b links to each other with the third pipeline 6, realizes that cutting fluid mixing tank 3 links to each other with the cutting rifle.
In practice, the pressurizing device 2 pressurizes the liquid and delivers the liquid to the cutting fluid mixing tank 3 through the second line 5, and the pressure of the liquid is gradually increased until the target pressure is reached. Before the pressure of the liquid reaches the target pressure, the control valve 35 is opened, and the liquid inlet portion 33b and the liquid outlet portion 34b are communicated, at this time, the pressure of the liquid entering the pipe assembly 38 is insufficient to support the liquid entering the cutting liquid mixing tank 3, so that the low-pressure liquid can directly flow out from the liquid outlet 341 b.
When the pressure of the liquid reaches the target pressure, the control valve 35 is closed to disconnect the liquid inlet portion 33b from the liquid outlet portion 34b, and at this time, the pressure of the liquid entering the liquid inlet portion 33b is sufficient to support the liquid entering the cutting-liquid mixing tank 3 itself, so that the high-pressure liquid enters the cutting-liquid mixing tank 3 from the tank inlet 332 and is fully mixed with the abrasive therein, and the obtained cutting liquid is discharged from the liquid outlet portion 34b and finally output from the cutting gun. Thus, the liquid inlet part 33b and the liquid outlet part 34b are integrated into an integrated pipe assembly 38, and the control of liquid entering and exiting the cutting liquid mixing tank body 3 is realized through the pipe assembly 38 and the control valve 35.
In addition, as shown in fig. 1, a control wrench 39 can be further installed on the cutting fluid mixing tank 3, and the opening and closing of the control valve 35 can be controlled by the control wrench 39, so that the operation is more convenient. The control valve 35 may be a control valve 35 on the liquid inlet pipe 33a, or may be a control valve 35 between the liquid inlet 33b and the liquid outlet 34 b.
Alternatively, referring to fig. 4 and 5, in order to prevent the abrasive from leaking out of the inlet port 332 and the outlet port 342 before the liquid enters the cutting fluid mixing tank 3, the inlet valve 36 and the outlet valve 37 may be installed at the inlet port 332 and the outlet port 342, respectively.
Wherein the control wrench 39 can also be used to control the opening and closing of the inlet and outlet valves 36, 37.
In practice, when the abrasive is filled and the liquid output by the pressurizing device 2 is low-pressure liquid, the tank inlet valve 36 and the tank outlet valve 37 are closed; when the liquid output from the pressurizing device 2 is high-pressure liquid, the tank inlet valve 36 and the tank outlet valve 37 are opened. In this way, abrasive does not leak out of the inlet 332 and outlet 342 before mixing with the liquid.
In addition, the tank outlet valve 37 can also be used to control the flow rate of the cutting fluid, and by controlling the opening degree of the tank outlet valve 37, the flow rate of the cutting fluid can be controlled.
Optionally, in order to prevent impurities from being contained in the liquid supplied from the liquid supply device 1 and affecting the operation of the pressurizing device 2, a filter (not shown in the drawing) may be installed in the liquid supply device 1. The filter can remove impurities in the liquid so that the subsequent process can normally run.
Optionally, the cutting device may further comprise a power supply device 8, where the power supply device 8 is electrically connected to the pressurizing device 2, for supplying power to the pressurizing device 2.
Optionally, in order to facilitate transport of the above-described cutting device, again with reference to fig. 1, the cutting device may further comprise a frame 9. The liquid supply device 1, the power supply device 8 and the pressurizing device 2 of the cutting equipment can be arranged on the frame 9, so that the cutting equipment can be transported more conveniently.
In the embodiment of the application, the cutting equipment comprises a liquid supply device 1, a supercharging device 2, a cutting liquid mixing tank body 3 and a cutting gun, wherein a feed inlet 31 is arranged on the cutting liquid mixing tank body 3, and a sealing valve 32 is arranged on the feed inlet 31. In the application of the cutting device, a technician can firstly fill the abrasive in the cutting fluid mixing tank 3 through the feeding hole 31, and the air in the cutting fluid mixing tank 3 can be discharged in the process. Then, the feed port 31 is closed by the seal valve 32, and the cutting fluid mixing tank 3 is sealed to prevent air from entering. Then, the pressurizing device 2 is used for conveying the liquid with the pressure not lower than the target pressure to the cutting fluid mixing tank 3, so that the liquid and the abrasive are fully mixed in the sealed cutting fluid mixing tank 3. And finally, conveying the mixed cutting fluid to a cutting gun for pipeline cutting operation. Therefore, air is not introduced in the process, and further, the air is prevented from entering the pipeline to be cut, and is mixed with oil gas in the pipeline to reach an explosion limit under the action of static electricity accumulation, so that combustion and explosion of the oil gas are caused, dangerous conditions are caused, and the safety of pipeline cutting can be improved.
In addition, the check valve 21 and the pressure relief valve 22 are arranged on the supercharging device 2, so that the working safety of the supercharging device 2 is ensured; a pressure gauge 23 is arranged between the pressure release valve 22 and the second pipeline 5, so that the monitoring of the liquid pressure is realized; the liquid inlet pipe fitting 33a and the liquid outlet pipe fitting 34a or the pipe fitting assembly 38 arranged on the cutting liquid mixing tank body 3 can control the time when liquid enters the cutting liquid mixing tank body 3; the tank inlet valve 36 and the tank outlet valve 37 can prevent the leakage of the abrasive, and the tank outlet valve 37 can also control the flow of the cutting fluid; the liquid supply device 1, the power supply device 8 and the pressurizing device 2 are arranged on the frame 9, so that the transportation of the cutting equipment is facilitated.
The foregoing description of the preferred embodiments of the present application is not intended to limit the application, but is intended to cover all modifications, equivalents, alternatives, and improvements falling within the spirit and principles of the application.
Claims (9)
1. Cutting equipment, its characterized in that, cutting equipment includes feed liquid device (1), supercharging device (2), cutting liquid mixing tank (3) and cutting rifle, wherein:
a feed inlet (31) is arranged on the cutting fluid mixing tank body (3), and a sealing valve (32) is arranged on the feed inlet (31);
The liquid supply device (1) is connected with the pressurizing device (2) through a first pipeline (4), the pressurizing device (2) is connected with the cutting liquid mixing tank body (3) through a second pipeline (5), and the cutting liquid mixing tank body (3) is connected with the cutting gun through a third pipeline (6);
The pressurizing device (2) is used for inputting liquid with pressure not lower than target pressure into the cutting fluid mixing tank body (3) through the second pipeline (5) after the cutting fluid mixing tank body (3) is filled with abrasive materials for sealing, so that the abrasive materials in the cutting fluid mixing tank body (3) are mixed with the liquid to obtain cutting fluid, and the cutting fluid is input into the cutting gun through the third pipeline (6);
wherein the inlet of the supercharging device (2) is connected with the first pipeline (4) through a one-way valve (21), and the one-way valve (21) is used for controlling the one-way flow of liquid from the first pipeline (4) to the supercharging device (2); the outlet of the pressurizing device (2) is connected with the second pipeline (5) through a pressure relief valve (22), and the pressure relief valve (22) is used for maintaining the pressure of the liquid in the second pipeline (5) to be lower than a pressure threshold value, wherein the pressure threshold value is larger than the target pressure;
A liquid inlet pipe fitting (33 a) and a liquid outlet pipe fitting (34 a) are arranged on the cutting liquid mixing tank body (3); the liquid inlet pipe fitting (33 a) comprises a liquid inlet (331), a tank inlet (332) and a first liquid outlet (333), the liquid inlet (331) is communicated with the tank inlet (332), the liquid inlet (331) is connected with the second pipeline (5), and a control valve (35) is arranged at the first liquid outlet (333); the liquid outlet pipe fitting (34 a) comprises a tank outlet (342) and a second liquid outlet (341 a) which are communicated with each other, and the second liquid outlet (341 a) is connected with the third pipeline (6); the tank inlet (332) and the tank outlet (342) are respectively communicated with the cutting fluid mixing tank body (3); a tank inlet valve (36) is arranged at the tank inlet (332), and a tank outlet valve (37) is arranged at the tank outlet (342);
-said control valve (35) for: when the pressure of the liquid flowing into the liquid inlet pipe fitting (33 a) is lower than the target pressure, closing the tank inlet valve (36) and the tank outlet valve (37), and communicating the liquid inlet (331) with the first liquid outlet (333) to enable the liquid to flow out of the first liquid outlet (333); when the pressure of the liquid flowing into the liquid inlet pipe fitting (33 a) is not lower than the target pressure, the tank inlet valve (36) and the tank outlet valve (37) are opened, the communication between the liquid inlet (331) and the first liquid outlet (333) is disconnected, and the liquid enters the cutting liquid mixing tank body (3) from the tank inlet (332).
2. Cutting apparatus according to claim 1, characterized in that a filter is arranged in the liquid supply device (1), which filter is used for filtering impurities in the liquid.
3. Cutting apparatus according to claim 1, characterized in that a pressure gauge (23) is mounted between the pressure relief valve (22) and the second line (5).
4. Cutting apparatus according to claim 1, characterized in that a fourth line (7) is mounted at the first outlet (333), which fourth line (7) is used for leading out liquid flowing into the inlet pipe (33 a) and having a pressure lower than the target pressure.
5. The cutting apparatus according to any one of claims 1-4, further comprising a power supply device (8) and a frame (9), the power supply device (8) being electrically connected to the pressurizing device (2), the liquid supply device (1), the power supply device (8) and the pressurizing device (2) being mounted on the frame (9).
6. Cutting equipment, its characterized in that, cutting equipment includes feed liquid device (1), supercharging device (2), cutting liquid mixing tank (3) and cutting rifle, wherein:
a feed inlet (31) is arranged on the cutting fluid mixing tank body (3), and a sealing valve (32) is arranged on the feed inlet (31);
The liquid supply device (1) is connected with the pressurizing device (2) through a first pipeline (4), the pressurizing device (2) is connected with the cutting liquid mixing tank body (3) through a second pipeline (5), and the cutting liquid mixing tank body (3) is connected with the cutting gun through a third pipeline (6);
The pressurizing device (2) is used for inputting liquid with pressure not lower than target pressure into the cutting fluid mixing tank body (3) through the second pipeline (5) after the cutting fluid mixing tank body (3) is filled with abrasive materials for sealing, so that the abrasive materials in the cutting fluid mixing tank body (3) are mixed with the liquid to obtain cutting fluid, and the cutting fluid is input into the cutting gun through the third pipeline (6);
wherein the inlet of the supercharging device (2) is connected with the first pipeline (4) through a one-way valve (21), and the one-way valve (21) is used for controlling the one-way flow of liquid from the first pipeline (4) to the supercharging device (2); the outlet of the pressurizing device (2) is connected with the second pipeline (5) through a pressure relief valve (22), and the pressure relief valve (22) is used for maintaining the pressure of the liquid in the second pipeline (5) to be lower than a pressure threshold value, wherein the pressure threshold value is larger than the target pressure;
A pipe fitting assembly (38) is arranged on the cutting fluid mixing tank body (3), and the pipe fitting assembly (38) comprises a fluid inlet part (33 b) and a fluid outlet part (34 b); the liquid inlet part (33 b) comprises a liquid inlet (331) and a tank inlet (332) which are communicated with each other, and the liquid inlet (331) is connected with the second pipeline (5); the liquid outlet part (34 b) comprises a tank outlet (342) and a liquid outlet (341 b) which are communicated with each other, and the liquid outlet (341 b) is connected with the third pipeline (6); a control valve (35) is arranged between the liquid inlet part (33 b) and the liquid outlet part (34 b), and the tank inlet (332) and the tank outlet (342) are respectively communicated with the cutting liquid mixing tank body (3); a tank inlet valve (36) is arranged at the tank inlet (332), and a tank outlet valve (37) is arranged at the tank outlet (342);
-said control valve (35) for: when the pressure of the liquid flowing into the pipe fitting assembly (38) is lower than the target pressure, closing the tank inlet valve (36) and the tank outlet valve (37), and communicating the liquid inlet part (33 b) with the liquid outlet part (34 b) to enable the liquid to flow out of the liquid outlet (341 b); when the pressure of the liquid flowing into the pipe fitting assembly (38) is not lower than the target pressure, the tank inlet valve (36) and the tank outlet valve (37) are opened, the communication between the liquid inlet part (33 b) and the liquid outlet part (34 b) is disconnected, and the liquid enters the cutting liquid mixing tank body (3) from the tank inlet (332).
7. Cutting apparatus according to claim 6, characterized in that a filter is arranged in the liquid supply device (1), which filter is used for filtering impurities in the liquid.
8. Cutting apparatus according to claim 6, characterized in that a pressure gauge (23) is mounted between the pressure relief valve (22) and the second line (5).
9. Cutting apparatus according to any one of claims 6-8, characterized in that the cutting apparatus further comprises a power supply device (8) and a frame (9), the power supply device (8) being electrically connected to the pressurizing device (2), the liquid supply device (1), the power supply device (8) and the pressurizing device (2) being mounted on the frame (9).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911300653.0A CN112975754B (en) | 2019-12-17 | 2019-12-17 | Cutting apparatus |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911300653.0A CN112975754B (en) | 2019-12-17 | 2019-12-17 | Cutting apparatus |
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| CN112975754A CN112975754A (en) | 2021-06-18 |
| CN112975754B true CN112975754B (en) | 2024-07-26 |
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| CN211841561U (en) * | 2019-12-17 | 2020-11-03 | 中国石油天然气集团有限公司 | Cutting device |
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| JP4700437B2 (en) * | 2005-08-15 | 2011-06-15 | 株式会社ディスコ | High-pressure liquid jet cutting device |
| CN207043997U (en) * | 2017-08-05 | 2018-02-27 | 董大勇 | A kind of high pressure mortar mixing arrangement |
| CN207043994U (en) * | 2017-08-21 | 2018-02-27 | 郑州福禄寿科技有限公司 | Portable Water Cutting equipment for embedded body |
| CN109483412A (en) * | 2019-01-16 | 2019-03-19 | 国家电投集团黄河上游水电开发有限责任公司 | Portable water cutting machine for emergency rescue |
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| CN211841561U (en) * | 2019-12-17 | 2020-11-03 | 中国石油天然气集团有限公司 | Cutting device |
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