A device for pressure testing of pipelines in water conservancy projects

Abstract

The present invention discloses a device for detecting pressure in water conservancy project pipelines, including a pipeline body, a base, a pressure detection device and an air pumping device. The pressure detection device includes a mounting seat, a fixing cylinder and an air bag, and also includes a pressurizing device and a deformation detection device. The beneficial effects of the present invention are that the air bag can be inflated by the air pumping device, and the pipeline body can be fixed and sealed by the air bag. Rigid pipelines can also be fixed and sealed, thereby completing subsequent air tightness detection; the deformation of the pipeline body under pressure can be detected by the deformation detection device; through the setting of the pressurizing device, during the pressure detection process, the pressure inside the air bag is always greater than the pressure during detection, which can avoid the deformation of the air bag caused by excessive external pressure. When detecting pressure changes, the air bag can fix and seal the pipeline body well.

Description

Technical Field

[0001] This invention relates to the field of auxiliary equipment technology for pipeline production, and specifically to a device for pressure testing of pipelines in water conservancy projects. Background Technology

[0002] Water conservancy pipelines are devices used for long-distance water transportation. During the water transportation process, they need to withstand a certain pressure. Therefore, during the production process, water conservancy pipelines need to be tested for their airtightness and deformation resistance under pressure.

[0003] Chinese patent application number CN201320593710.0 discloses a pipeline pressure testing device, which uses flexible zippers to fix both ends of the pipeline to be tested to a plug core, and then performs pressure testing on the pipeline. However, it has the following problems:

[0004] Firstly, it can only inspect flexible pipes, while most water conservancy pipelines are rigid pipes such as plastic steel. The aforementioned patent cannot block rigid pipes, thus making it impossible to inspect them.

[0005] Secondly, the aforementioned patents cannot detect pipe deformation. Summary of the Invention

[0006] To address the aforementioned problems, this invention provides a device for pressure testing of pipelines in water conservancy projects. This invention is achieved through the following technical solution.

[0007] A device for pressure testing of pipelines in water conservancy projects includes a pipeline body, a base, a pressure testing device, and a pumping device;

[0008] The lower surface of the base is fixed with support legs, and the pressure detection device is symmetrically arranged on the base from left to right.

[0009] The pressure detection device includes a mounting base, a fixed cylinder, and an air bladder. The mounting bases are symmetrically arranged on the upper surface of a base. The left mounting base is fixedly connected to the base, and the right mounting base is slidably connected to the base. A support plate is fixedly attached to the right side of the upper surface of the base. Sliding rods are longitudinally and evenly fixed between the support plate and the left mounting base, and the right mounting base is slidably connected to the sliding rods. The fixed cylinders are located above the mounting bases, with open sides where they are close to each other. A cover is fixedly attached to the outside of the fixed cylinder, and an annular transfer chamber is fixedly attached to the middle of the cover. The bottom of the transfer chamber... The bottom of the cover is fixedly connected to the mounting base via a support seat and a support rod, respectively. A ring-shaped connecting plate is fixedly connected to the fixed cylinder at the position corresponding to the transfer chamber. The connecting plate is densely covered with first inflation holes. The air bladder is ring-shaped and fixedly connected to the inner wall of the fixed cylinder, covering the connecting plate inside. A second inflation chamber is fixedly connected to the side of the fixed cylinder away from the center of the base. The second inflation chamber is connected to the inner cavity of the fixed cylinder through a second inflation hole. A first inflation chamber is also fixedly connected to the side of the second inflation chamber away from the fixed cylinder. A first connecting pipe is provided between the first inflation chamber and the transfer chamber.

[0010] The air pumping device is used to supply air to the first and second air chambers.

[0011] Furthermore, a pressure sensor is fixedly connected inside the second inflation chamber.

[0012] Further, the pumping device includes a jet pipe, a reciprocating screw, a pumping base, and a pumping motor; a pumping chamber is formed within the base, and conveying chambers are symmetrically formed at both ends of the pumping chamber; one end of the jet pipe is connected to the conveying chamber, and the other end of the jet pipe is fixedly connected to a T-junction; the other two ports of the T-junction are respectively connected to a first inflation chamber and a second inflation chamber via a first inflation pipe and a second inflation pipe; a first reversing solenoid valve and a second reversing solenoid valve are respectively installed in the first inflation pipe and the second inflation pipe; a first one-way valve is installed in the jet pipe, and the first one-way valve allows the gas to flow in the following direction: Opposite to the inner cavity of the conveying chamber, the pumping chamber has an air extraction port located near each conveying chamber. The air extraction port is equipped with a second one-way valve, which allows gas to pass in the direction of the pumping chamber. The reciprocating screw is rotatably connected to the pumping chamber via symmetrical left and right rotating shafts. Guide rods are fixed to the front and rear sides of the rotating shafts. The pumping seat is slidably and sealed within the pumping chamber. The pumping seat meshes with the reciprocating screw and is slidably connected to the guide rods. The pumping motor is fixed to the left side of the base via symmetrical front and rear support plates. The output shaft of the pumping motor is connected to the rotating shaft on the left side via a coupling.

[0013] Furthermore, it also includes a pressurizing device, which includes a fixing member and a second connecting pipe; the left and right sides of the cover have connecting holes; the fixing member is fixedly connected within the space enclosed by the cover and the fixed cylinder; the fixing member includes a pair of fixed rings arranged at intervals; a sliding sleeve is uniformly fixed between the pair of fixed rings; a support rod is slidably connected inside the sliding sleeve; a first sliding ring is fixedly connected to one end of the support rod near the second inflation hole; a second sliding ring is fixedly connected to the other end of the support rod; the first and second sliding rings are slidably sealed within the space enclosed by the cover and the fixed cylinder; an air outlet is opened on the fixing ring near the first sliding ring; the fixing member and the second sliding ring are arranged on both sides of the transfer chamber; a limit ring is fixedly connected to the inner wall of the cover and the outer wall of the fixed cylinder between the second sliding ring and the transfer chamber; a spring is sleeved on the support rod between the fixing member and the first fixed ring; one end of the second connecting pipe is connected to the second inflation chamber; the other end of the second connecting pipe is connected to the cover; the connection position between the second connecting pipe and the cover is located between the two fixed rings; the cover is made of transparent material.

[0014] Furthermore, a pressure relief pipe is fixedly connected to the first connecting pipe and the second connecting pipe, and a pressure relief solenoid valve is provided inside the pressure relief pipe.

[0015] Furthermore, when the second sliding ring contacts the limiting ring, the spring is in a compressed state.

[0016] Furthermore, it also includes a deformation detection device, which comprises a transmission chamber, a lifting column, and a screw. The transmission chamber is fixedly connected to the mounting base on the right side, and a lifting sleeve is fixedly connected to the top of the transmission chamber. The lifting column is slidably connected inside the lifting sleeve. Guide grooves are provided on each side plate of the lifting sleeve. Guide blocks adapted to the guide grooves are fixedly connected to the lower part of each side of the lifting column. A support plate is fixedly connected to the top of the lifting column. A pressure sensor is fixedly connected to the upper surface of the support plate. A screw hole leading to its bottom is also provided inside the lifting column. The screw is engaged in the screw hole and is rotatably connected to the bottom plate of the lifting sleeve. A driven bevel gear is fixedly connected to the bottom of the screw. A shaft is rotatably connected to the right side of the transmission chamber. One end of the shaft extending into the transmission chamber is fixedly connected to a driving bevel gear, and the driving bevel gear meshes with the driven bevel gear.

[0017] Furthermore, an operation panel is fixedly connected to the base, and a display screen is fixedly connected to the operation panel. The air pressure sensor and the pressure sensor are electrically connected to the display screen through signal lines. The operation panel is also equipped with a motor switch, a pressure relief switch, a first reversing switch, and a second reversing switch.

[0018] The beneficial effects of this invention are as follows:

[0019] 1. The airbag can be inflated by the air pump device, and the airbag can be used to fix and seal the pipe body. Rigid pipes can also be fixed and sealed, thereby completing the subsequent airtightness test.

[0020] 2. The deformation detection device can detect the deformation of the pipeline body under pressure.

[0021] 3. With the addition of a pressurization device, the pressure inside the airbag is always greater than the pressure during the pressure test, which can prevent the airbag from deforming due to excessive external pressure. The airbag can effectively fix and seal the pipeline body when the pressure changes. Attached Figure Description

[0022] To more clearly illustrate the technical solution of the present invention, the accompanying drawings used in the description of the specific embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 Front view of a device for pressure testing of pipelines in water conservancy projects according to the present invention.

[0024] Figure 2 A partial sectional view of a device for pressure testing of pipelines in water conservancy projects according to the present invention;

[0025] Figure 3 : A partial longitudinal sectional view of the air pumping device described in this invention;

[0026] Figure 4 : A partial transverse sectional view of the air pumping device described in this invention;

[0027] Figure 5 : Figure 2 A magnified view of section I shown;

[0028] Figure 6 : A schematic diagram of the pipeline connection at the positions of the first and second inflation chambers of the present invention;

[0029] Figure 7 : A schematic diagram of the structure of the fastener described in this invention;

[0030] Figure 8 : A half-sectional view of the position of the fixed cylinder described in this invention;

[0031] Figure 9 : A schematic diagram of the pressurization device of the present invention during initial fixing;

[0032] Figure 10: A schematic diagram of the pressurization and fixing process of the pressurization device described in this invention;

[0033] Figure 11 : A schematic diagram of the deformation detection device of the present invention.

[0034] The attached figures are labeled as follows:

[0035] 1- Pipe body;

[0036] 2-Base, 21-Feet;

[0037] 31-Mounting base, 32-Fixing cylinder, 33-Airbag, 34-Bracket plate, 35-Sliding rod, 36-Cover, 37-Transfer chamber, 38-Support base, 39-Support rod, 310-Connecting plate, 311-First inflation port, 312-Second inflation chamber, 313-Second inflation port, 314-First inflation chamber, 315-First connecting pipe, 316-Pressure sensor;

[0038] 41-Jet pipe, 42-Reciprocating screw, 43-Pump seat, 44-Pump motor, 45-Pumping chamber, 46-Conveying chamber, 47-Tee, 48-First inflation pipe, 49-Second inflation pipe, 410-First reversing solenoid valve, 411-Second reversing solenoid valve, 412-First check valve, 413-Air extraction port, 414-Second check valve, 415-Shaft, 416-Guide rod, 417-Support plate, 418-Coupling;

[0039] 51-Fixed component, 511-Fixing ring, 512-Sliding sleeve, 513-Air outlet, 52-Second connecting pipe, 53-Connecting hole, 54-Support rod, 55-First sliding ring, 56-Second sliding ring, 57-Limiting ring, 58-Spring, 59-Pressure relief pipe, 510-Pressure relief solenoid valve;

[0040] 6-Deformation detection device, 61-Transmission chamber, 62-Lifting column, 63-Screw, 64-Lifting sleeve, 65-Guide groove, 66-Guide block, 67-Panel, 68-Pressure sensor, 69-Screw hole, 610-Driven bevel gear, 611-Shaft, 612-Driving bevel gear;

[0041] 71-Operation panel, 72-Display screen, 73-Motor switch, 74-Pressure relief switch, 75-First reversing switch, 76-Second reversing switch. Detailed Implementation

[0042] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0043] like Figure 1-11 As shown, the present invention has the following five specific embodiments.

[0044] Example 1

[0045] A device for pressure testing of pipelines in water conservancy projects includes a pipeline body 1, a base 2, a pressure testing device, and a pumping device;

[0046] The lower surface of the base 2 is fixed with a support leg 21, and the pressure detection device is symmetrically arranged on the base 2 from left to right.

[0047] The pressure detection device includes a mounting base 31, a fixing cylinder 32, and an air bladder 33. The mounting bases 31 are symmetrically arranged on the upper surface of the base 2. The left mounting base 31 is fixedly connected to the base 2, and the right mounting base 31 is slidably connected to the base 2. A support plate 34 is fixedly connected to the right side of the upper surface of the base 2. Sliding rods 35 are longitudinally and evenly fixed between the support plate 34 and the left mounting base 31, and the right mounting base 31 is slidably connected to the sliding rods 35. The fixing cylinder 32 is located above the mounting base 31, with its closest side open. A cover 36 is fixedly connected to the outside of the fixing cylinder 32. An annular transfer chamber 37 is fixedly connected to the middle of the cover 36. The bottom of the transfer chamber 37 and the bottom of the cover 36 are also connected to the cover. Parts are fixedly connected to the mounting base 31 via support base 38 and support rod 39 respectively. A ring-shaped connecting plate 310 is fixedly connected to the fixed cylinder 32 at the position corresponding to the transfer chamber 37. The connecting plate 310 is densely covered with first inflation holes 311. The airbag 33 is ring-shaped and is fixedly connected to the inner wall of the fixed cylinder 32, covering the connecting plate 310 inside. A second inflation chamber 312 is fixedly connected to the side of the fixed cylinder 32 away from the center of the base 2. The second inflation chamber 312 is connected to the inner cavity of the fixed cylinder 32 through the second inflation hole 313. A first inflation chamber 314 is also fixedly connected to the side of the second inflation chamber 312 away from the fixed cylinder 32. A first connecting pipe 315 is provided between the first inflation chamber 314 and the transfer chamber 37.

[0048] The air pumping device is used to supply air to the first air chamber 314 and the second air chamber 312.

[0049] Preferably, a pressure sensor 316 is fixedly connected inside the second inflation chamber 312.

[0050] In this embodiment:

[0051] First, move the pressure detection device on the right side to the right along the slide bar 35 to facilitate the installation of the pipe body 1. To ensure smooth movement of the pressure detection device on the right side, the jet pipe 41 on the right side is set as a flexible hose of sufficient length. Insert the left end of the pipe body 1 into the fixed cylinder 32 on the left side, and then move the pressure detection device on the right side to the left along the slide bar 35 so that the right end of the pipe body 1 is inserted into the fixed cylinder 32 on the right side. Figure 1 As shown, the installation of pipe body 1 is complete.

[0052] First, air is introduced into the first inflation chamber 314 through the air pumping device. The air enters the transfer chamber 37 through the first connecting pipe 315 and enters the air bag 33 through the first inflation hole 311. The air bag 33 expands to fix and seal the pipe body 1.

[0053] After the pipe body 1 is fixed and sealed, air is introduced into the second inflation chamber 312 through the air pump device. The air enters the fixed cylinder 32 through the second inflation hole 313. Due to the sealing of the airbag 33, the air enters the pipe body 1. The air pressure in the second inflation chamber 312 is detected by the air pressure sensor 316. The air pressure at this point is consistent with the air pressure in the pipe body 1. After a period of time, it is observed whether the air pressure drops. If the air pressure drops significantly, it indicates that the air tightness of the pipe body 1 is not good. If the air pressure is roughly the same, it indicates that the air tightness of the pipe body 1 is good.

[0054] Example 2

[0055] Based on Example 1, this example discloses the specific technical features of the air pumping device.

[0056] The air pumping device includes an air jet pipe 41, a reciprocating screw 42, a pumping base 43, and a pumping motor 44. A pumping chamber 45 is formed inside the base 2, and conveying chambers 46 are symmetrically formed at both ends of the pumping chamber 45. One end of the air jet pipe 41 is connected to the conveying chamber 46, and the other end of the air jet pipe 41 is fixedly connected to a tee 47. The other two ports of the tee 47 are connected to the first inflation chamber 314 and the second inflation chamber 312 respectively through a first inflation pipe 48 and a second inflation pipe 49. A first reversing solenoid valve 410 and a second reversing solenoid valve 411 are respectively installed in the first inflation pipe 48 and the second inflation pipe 49. A first one-way valve 412 is installed in the air jet pipe 41, allowing the gas to flow in a direction away from the conveying chamber 414. 6. The pumping chamber 45 is provided with an air extraction port 413 near each conveying chamber 46. The air extraction port 413 is provided with a second one-way valve 414. The second one-way valve 414 allows gas to pass in the direction of the pumping chamber 45. The reciprocating screw 42 is rotatably connected to the pumping chamber 45 through left and right symmetrical rotating shafts 415. Guide rods 416 are fixed to the front and rear sides of the rotating shafts 415. The pumping seat 43 is sealed and slidably connected to the pumping chamber 45. The pumping seat 43 meshes with the reciprocating screw 42 and is slidably connected to the guide rods 416. The pumping motor 44 is fixed to the left side of the base 2 through front and rear symmetrical support plates 417. The output shaft of the pumping motor 44 is connected to the left rotating shaft 415 through a coupling 418.

[0057] In this embodiment:

[0058] Air can be independently supplied to the first inflation chamber 314 and the second inflation chamber 312 via an air pumping device.

[0059] When the pumping motor 44 is working, it drives the integrated structure of the rotating shaft 415 and the reciprocating screw 42 to rotate through the coupling 418. Since the pumping seat 43 meshes with the reciprocating screw 42, the pumping seat 43 can perform left and right reciprocating motion when the reciprocating screw 42 rotates.

[0060] When the pump seat 43 moves to the left, the air intake port 413 on the left draws in outside air, and the jet pipe 41 on the right ejects gas. When the pump seat 43 moves to the right, the air intake port 413 on the right draws in outside air, and the jet pipe 41 on the left ejects gas. That is, the jet pipes 41 on the left and right sides eject gas alternately.

[0061] First, the second solenoid valve is closed and the first reversing solenoid valve 410 is opened. The gas in the jet pipe 41 enters the airbag 33 through the first inflation pipe 48, the first inflation chamber 314 and the first connecting pipe 315 in sequence, thereby inflating the airbag 33 to fix and seal the pipe body 1.

[0062] Then the second solenoid valve is opened and the first reversing solenoid valve 410 is closed. The gas in the jet pipe 41 enters the fixed cylinder 32 and the pipe body 1 through the second inflation pipe 49 and the second inflation port 313, thereby performing pressure detection on the pipe body 1.

[0063] Example 3

[0064] Based on Example 2, this example discloses the specific technical features of the booster device.

[0065] It also includes a pressurizing device, which includes a fixing member 51 and a second connecting pipe 52; connecting holes 53 are provided on the left and right sides of the cover 36; the fixing member 51 is fixedly connected in the space enclosed by the cover 36 and the fixed cylinder 32; the fixing member 51 includes a pair of fixed rings 511 arranged at intervals; a sliding sleeve 512 is circumferentially fixed between the pair of fixed rings 511; a support rod 54 is slidably connected in the sliding sleeve 512; a first sliding ring 55 is fixedly connected to one end of the support rod 54 near the second inflation hole 313; a second sliding ring 56 is fixedly connected to the other end of the support rod 54; the first sliding ring 55 and the second sliding ring 56 are slidably connected in a sealing manner to the cover 36 and the fixed cylinder 32. Within the enclosed space, an air vent 513 is provided on the fixed ring 511 near the first sliding ring 55. The fixing member 51 and the second sliding ring 56 are arranged on both sides of the transfer chamber 37. The inner wall of the cover 36 between the second sliding ring 56 and the transfer chamber 37 and the outer wall of the fixed cylinder 32 are fixedly connected to the limiting ring 57. A spring 58 is sleeved on the support rod 54 between the fixing member 51 and the first fixed ring 511. One end of the second connecting pipe 52 is connected to the second inflation chamber 312, and the other end of the second connecting pipe 52 is connected to the cover 36. The connection position of the second connecting pipe 52 and the cover 36 is located between the two fixed rings 511. The cover 36 is made of transparent material.

[0066] Preferably, a pressure relief pipe 59 is fixedly connected to the first connecting pipe 315 and the second connecting pipe 52, and a pressure relief solenoid valve 510 is provided inside the pressure relief pipe 59.

[0067] Preferably, when the second sliding ring 56 contacts the limiting ring 57, the spring 58 is in a compressed state.

[0068] In this embodiment:

[0069] The pressure inside the fixed cylinder 32 acts on the outside of the airbag 33. When it exceeds the internal pressure of the airbag 33, it will cause the airbag 33 to deform more severely, making it impossible to fix and seal the pipe body 1. By setting up a pressurization device, the pressure inside the airbag 33 can always be greater than the external pressure. The principle of the pressurization device is as follows:

[0070] like Figure 9 and 10As shown, the space enclosed by the fixing member 51, the second sliding ring 56, the cover 36, the fixed cylinder 32, and the transfer chamber 37 is denoted as A, and the pressure here is denoted as P1; the space enclosed by the first sliding ring 55, the fixing member 51, the cover 36, and the fixed cylinder 32 is denoted as B. Due to the setting of the air outlet 513 and the second connecting pipe 52, the pressure in space B, the second air chamber 312, the fixed cylinder 32, and the pipe body 1 is the same, and the pressure here is denoted as P2; the external atmospheric pressure is denoted as P; when the second sliding ring 56 contacts the limiting ring 57, the compression reaction force of the spring 58 is denoted as F.

[0071] like Figure 8 As shown, in the initial state, the pressure relief solenoid valve 510 is in the open state, at which time P1=P2=P.

[0072] After the pipe body 1 is inserted, close the pressure relief solenoid valve 510.

[0073] 1. First, perform initial fixation, such as... Figure 9 As shown, the second solenoid valve is closed and the first reversing solenoid valve 410 is opened. The air pumping device fills the first air chamber 314 with air. The air enters the space A through the first connecting pipe 315. As the air is continuously filled, the integrated structure of the support rod 54, the first sliding ring 55 and the second sliding ring 56 will move to the right. At this time, the spring 58 is further compressed. Let the change of the compression reaction force of the spring 58 relative to F be F_change. Then the first sliding ring 55 is pushed to the left. The pushing force is: F + F_change.

[0074] Let the area of ​​one side of the first sliding ring 55 and the second sliding ring 56 be S, and the pressure difference between the two sides of the second sliding ring 56 be P1-P. Then the second sliding ring 56 is subjected to a rightward thrust, which is (P1-P)*S. Figure 9 Force analysis of support rod 54: In steady state: F + F_variable = (P1 - P) * S, that is, P1 = (F + F_variable) / S + P. At this time, P1 is greater than P. The more gas rushes into space A, the larger F_variable and P1 become.

[0075] 2. Then, pressurize and fix it, such as... Figure 10 As shown, the second solenoid valve is then opened and the first reversing solenoid valve 410 is closed. The air pumping device fills the second air chamber 312 with air. The air enters the fixed cylinder 32 and the pipe body 1 through the second air inlet 313. The air also enters the space B through the second connecting pipe 52 and the air outlet 513.

[0076] As air continuously fills space B, causing the pressure to increase, the integrated structure of support rod 54, first sliding ring 55, and second sliding ring 56 will move to the left. Figure 10As shown, when the second sliding ring 56 is not in contact with the limiting ring 57, the following relationship is satisfied.

[0077] The first sliding ring 55 experiences a leftward thrust based on the pressure difference between its two sides: (P2-P)*S. The thrust from the spring 58 on the first sliding ring 55 is: F+F_variable. The second sliding ring 56 experiences a rightward thrust based on the pressure difference between its two sides: (P1-P)*S. Figure 10 Force analysis is performed on the support rod 54. In the steady state: (P2-P)*S+F+Fvariable=(P1-P)*S, then P1=P2+(F+Fvariable) / S. When the second sliding ring 56 is not in contact with the limiting ring 57, P1 is always greater than P2. That is, the pressure inside the airbag 33 is greater than the pressure inside the pipe body 1 and the fixed cylinder 32. The pressure inside the fixed cylinder 32 acts on the outside of the airbag 33 but is less than the pressure inside the airbag 33, so that the airbag 33 will not deform as the detected pressure increases.

[0078] When the second sliding ring 56 contacts the limiting ring 57, the air filled into space B will not cause a change in the pressure in space A. Based on this, the cover 36 is made of transparent material. When air is continuously filled into the pipe body 1 and space B, the position of the second sliding ring 56 can be observed in real time, and the air filling can be stopped before it contacts the limiting ring 57.

[0079] Example 4

[0080] Based on Example 3, this example discloses the specific technical features of the deformation detection device.

[0081] It also includes a deformation detection device 6, which comprises a transmission chamber 61, a lifting column 62, and a screw 63. The transmission chamber 61 is fixedly connected to the right mounting base 31, and a lifting sleeve 64 is fixedly connected to the top of the transmission chamber 61. The lifting column 62 is slidably connected inside the lifting sleeve 64. Guide grooves 65 are provided on each side plate of the lifting sleeve 64. Guide blocks 66 that are adapted to the guide grooves 65 are fixedly connected to the lower part of each side of the lifting column 62. A support plate 67 is fixedly connected to the top of the lifting column 62. A pressure sensor 68 is fixedly attached to the upper surface of the 7. A screw hole 69 leading to the bottom of the lifting column 62 is also provided inside the column. The screw 63 is engaged in the screw hole 69. The screw 63 is rotatably connected to the bottom plate of the lifting sleeve 64. A driven bevel gear 610 is fixedly attached to the bottom of the screw 63. A shaft 611 is rotatably connected to the right side of the transmission chamber 61. A driving bevel gear 612 is fixedly attached to one end of the shaft 61 that extends into the transmission chamber 61. The driving bevel gear 612 meshes with the driven bevel gear 610.

[0082] In this embodiment:

[0083] In the prior art, when pressure testing the pipe body 1, only the airtightness of the pipe body 1 can be tested. It is impossible to determine whether the pipe body 1 deforms under pressure. This problem can be solved by the deformation detection device 6.

[0084] After the pipeline is fixed and sealed, the drive bevel gear 612 can be driven to rotate through the shaft 611, thereby rotating the driven bevel gear 610 and the screw 63. This causes the lifting column 62, the support plate 67 and the pressure sensor 68 to rise, so that the pressure sensor 68 presses against the pipeline body 1 and records the initial reading. During the pressure detection process, if the reading of the pressure sensor 68 changes significantly, it indicates that the pipeline body 1 has deformed; otherwise, it indicates that there is no obvious deformation.

[0085] Example 5

[0086] Based on Example 4, this example discloses the specific technical features of the operation control system.

[0087] An operation panel 71 is fixedly attached to the base 2, and a display screen 72 is fixedly attached to the operation panel 71. The air pressure sensor 316 and the pressure sensor 68 are electrically connected to the display screen 72 through signal lines. The operation panel 71 is also equipped with a motor switch 73, a pressure relief switch 74, a first reversing switch 75, and a second reversing switch 76.

[0088] In this embodiment:

[0089] The pumping motor 44 is powered by an external power source and its start and stop are controlled by the motor switch 73.

[0090] Each pressure relief solenoid valve 510 is connected in parallel with an external power supply and is controlled to open and close via a pressure relief switch 74.

[0091] The first reversing solenoid valve 410 and the second reversing solenoid valve 411 are powered by an external power source and are controlled to open and close by the first reversing switch 75 and the second reversing switch 76, respectively.

[0092] When using the equipment, first insert both ends of the pipe body 1 into the fixed cylinder 32, and then close the pressure relief solenoid valve 510.

[0093] Next, the second solenoid valve is closed and the first reversing solenoid valve 410 is opened. The air bladder 33 is inflated by the air pumping device, thereby fixing and sealing the pipeline body 1.

[0094] Then the second solenoid valve is opened and the first reversing solenoid valve 410 is closed, and gas is input into the pipeline body 1 through the air pumping device. During this process, the pressurizing device can ensure that the pressure in the airbag 33 is always greater than the pressure in the fixed cylinder 32, thereby preventing the airbag 33 from deforming.

[0095] After the air filling of the pipeline body 1 is completed, turn off the air pump device.

[0096] The air pressure sensor 316 can detect the pressure inside the pipe body 1 and display it on the display screen 72. The reading of the pressure sensor 68 is also displayed on the display screen 72. After a period of time, observe whether the two readings change, and you can determine whether the airtightness of the pipe body 1 is good and whether it is deformed.

[0097] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to any specific implementation. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A device for pressure testing of pipelines in water conservancy projects, comprising a pipeline body, characterized in that: It also includes a base, a pressure detection device, and an air pump; The lower surface of the base is fixed with support legs, and the pressure detection device is symmetrically arranged on the base from left to right. The pressure detection device includes a mounting base, a fixed cylinder, and an air bladder. The mounting bases are symmetrically arranged on the upper surface of a base. The left mounting base is fixedly connected to the base, and the right mounting base is slidably connected to the base. A support plate is fixedly attached to the right side of the upper surface of the base. Sliding rods are longitudinally and evenly fixed between the support plate and the left mounting base, and the right mounting base is slidably connected to the sliding rods. The fixed cylinders are located above the mounting bases, with open sides where they are close to each other. A cover is fixedly attached to the outside of the fixed cylinder, and an annular transfer chamber is fixedly attached to the middle of the cover. The bottom of the transfer chamber... The bottom of the cover is fixedly connected to the mounting base via a support seat and a support rod, respectively. A ring-shaped connecting plate is fixedly connected to the fixed cylinder at the position corresponding to the transfer chamber. The connecting plate is densely covered with first inflation holes. The air bladder is ring-shaped and fixedly connected to the inner wall of the fixed cylinder, covering the connecting plate inside. A second inflation chamber is fixedly connected to the side of the fixed cylinder away from the center of the base. The second inflation chamber is connected to the inner cavity of the fixed cylinder through a second inflation hole. A first inflation chamber is also fixedly connected to the side of the second inflation chamber away from the fixed cylinder. A first connecting pipe is provided between the first inflation chamber and the transfer chamber. The air pumping device is used to supply air to the first and second air filling chambers; It also includes a pressurizing device, which includes a fixing component and a second connecting pipe; the left and right sides of the cover have connecting holes; the fixing component is fixedly connected to the space enclosed by the cover and the fixed cylinder; the fixing component includes a pair of fixed rings arranged at intervals; a sliding sleeve is uniformly fixed between the pair of fixed rings; a support rod is slidably connected inside the sliding sleeve; a first sliding ring is fixedly connected to one end of the support rod near the second inflation hole; a second sliding ring is fixedly connected to the other end of the support rod; the first and second sliding rings are slidably connected in a sealed manner within the space enclosed by the cover and the fixed cylinder; an air outlet is opened on the fixing ring near the first sliding ring; the fixing component and the second sliding ring are arranged on both sides of the transfer chamber; a limit ring is fixedly connected to the inner wall of the cover and the outer wall of the fixed cylinder between the second sliding ring and the transfer chamber; a spring is sleeved on the support rod between the fixing component and the first fixed ring; one end of the second connecting pipe is connected to the second inflation chamber; the other end of the second connecting pipe is connected to the cover; the connection position between the second connecting pipe and the cover is located between the two fixed rings; the cover is made of transparent material.

2. The device for pressure testing of pipelines in water conservancy projects according to claim 1, characterized in that: A pressure sensor is fixedly connected inside the second inflation chamber.

3. The device for pressure testing of pipelines in water conservancy projects according to claim 2, characterized in that: The pumping device includes a jet pipe, a reciprocating screw, a pumping base, and a pumping motor. A pumping chamber is formed within the base, and symmetrical delivery chambers are formed at both ends of the pumping chamber. One end of the jet pipe is connected to the delivery chamber, and the other end of the jet pipe is fixedly connected to a T-junction. The other two ports of the T-junction are connected to a first inflation chamber and a second inflation chamber respectively via a first inflation pipe and a second inflation pipe. A first reversing solenoid valve and a second reversing solenoid valve are respectively installed in the first inflation pipe and the second inflation pipe. A first one-way valve is installed in the jet pipe, allowing gas flow in the direction opposite to the delivery direction. The pumping chamber has an air extraction port located near each delivery chamber. A second one-way valve is installed inside the air extraction port, allowing gas to pass through in the direction of the pumping chamber. The reciprocating screw is rotatably connected to the pumping chamber via symmetrical left and right rotating shafts. Guide rods are fixed to the front and rear sides of the rotating shafts. The pumping seat is slidably and sealed within the pumping chamber, meshing with the reciprocating screw and slidably connected to the guide rods. The pumping motor is fixed to the left side of the base via symmetrical front and rear support plates. The output shaft of the pumping motor is connected to the left rotating shaft via a coupling.

4. The device for pressure testing of pipelines in water conservancy projects according to claim 1, characterized in that: A pressure relief pipe is fixedly connected to the first connecting pipe and the second connecting pipe, and a pressure relief solenoid valve is installed inside the pressure relief pipe.

5. The device for pressure testing of pipelines in water conservancy projects according to claim 1, characterized in that: When the second sliding ring contacts the limiting ring, the spring is in a compressed state.

6. The device for pressure testing of pipelines in water conservancy projects according to claim 4, characterized in that: It also includes a deformation detection device, which comprises a transmission chamber, a lifting column, and a screw. The transmission chamber is fixedly connected to the mounting base on the right side, and a lifting sleeve is fixedly connected to the top of the transmission chamber. The lifting column is slidably connected inside the lifting sleeve. Guide grooves are provided on each side plate of the lifting sleeve. Guide blocks adapted to the guide grooves are fixedly connected to the lower part of each side of the lifting column. A support plate is fixedly connected to the top of the lifting column. A pressure sensor is fixedly connected to the upper surface of the support plate. A screw hole leading to its bottom is also provided inside the lifting column. The screw is engaged in the screw hole and is rotatably connected to the bottom plate of the lifting sleeve. A driven bevel gear is fixedly connected to the bottom of the screw. A shaft is rotatably connected to the right side of the transmission chamber. A driving bevel gear is fixedly connected to one end of the shaft that extends into the transmission chamber. The driving bevel gear meshes with the driven bevel gear.

7. The device for pressure testing of pipelines in water conservancy projects according to claim 6, characterized in that: An operation panel is fixedly attached to the base, and a display screen is fixedly attached to the operation panel. The air pressure sensor and the pressure sensor are electrically connected to the display screen through signal lines. The operation panel is also equipped with a motor switch, a pressure relief switch, a first reversing switch, and a second reversing switch.

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