CN117109833A - A device for external hydraulic pressure testing of large-diameter cylindrical parts - Google Patents

A device for external hydraulic pressure testing of large-diameter cylindrical parts Download PDF

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Publication number
CN117109833A
CN117109833A CN202311024100.3A CN202311024100A CN117109833A CN 117109833 A CN117109833 A CN 117109833A CN 202311024100 A CN202311024100 A CN 202311024100A CN 117109833 A CN117109833 A CN 117109833A
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China
Prior art keywords
head
flange
hydraulic pressure
external hydraulic
diameter cylindrical
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Pending
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CN202311024100.3A
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Chinese (zh)
Inventor
魏垣伟
韩永永
杨博
王斌
畅宁
杨继锋
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Shanxi North Machine Building Co Ltd
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Shanxi North Machine Building Co Ltd
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Priority to CN202311024100.3A priority Critical patent/CN117109833A/en
Publication of CN117109833A publication Critical patent/CN117109833A/en
Pending legal-status Critical Current

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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
    • G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
    • G01M3/32—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for containers, e.g. radiators
    • G01M3/3236—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for containers, e.g. radiators by monitoring the interior space of the containers
    • G01M3/3272—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for containers, e.g. radiators by monitoring the interior space of the containers for verifying the internal pressure of closed containers
    • 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
    • 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
    • G01N3/04—Chucks
    • 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
    • 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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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)

Abstract

The invention belongs to the technical field of machine manufacturing, and discloses a device for testing external water pressure of large-diameter cylinder parts, which comprises a support (1), a lower end socket (2), a lower flange (3), an upper flange (4), a cylinder (8), lifting lugs (9), a pressure monitoring pipe (16), a water injection pipe (19), an inner end socket (23), a discharge pipe (25), a manhole (26) and an upper end socket (27); lifting lugs (9) are arranged above the cylinder body (8), and an upper flange (4) is arranged at the edge of the bottom of the cylinder body (8); the top edge of the lower seal head (2) is provided with a lower flange (3), and the upper flange and the lower flange are fixedly connected. According to the invention, the external hydraulic test device simulates the working condition of actual use, and the tightness and the overall strength of the pressed part can be tested under specific pressure to meet the use requirement, so that the external hydraulic test device has the effects of checking the compressive strength and tightness of the pressed part and finding defects in time.

Description

Device for testing external water pressure of large-diameter cylinder part
Technical Field
The invention belongs to the technical field of machine manufacturing, and particularly relates to a device for testing external water pressure of large-diameter cylinder parts.
Background
During the manufacturing process of the pressed parts, particularly the pressed parts of large-diameter cylinders in an underwater working environment, after the service operation is carried out for a plurality of years, the pressed parts can be corroded and worn to a certain extent, the materials are degraded, tired and cracked, overheat or overburden occurs, defects of the pressed parts cannot be detected, and the strength of the pressed parts is reduced. Therefore, the design requirement is that the pressure-bearing member is subjected to a hydrostatic test, and whether the strength of the pressure-bearing member can continuously meet the use requirement can be checked through the hydrostatic test, so that accidents caused by the fact that the pressure-bearing member is damaged and the defect that the pressure-bearing member is difficult to find in the operation process can be effectively avoided.
Large diameter cylindrical parts in an underwater working environment, the outer surface of which is subjected to water pressure for a long period of time. Therefore, the development of a device for testing the external water pressure of large-diameter cylinder parts simulates the working condition of an underwater working environment and is a technical problem which needs to be solved in the field.
Disclosure of Invention
The invention aims to provide a device for testing the external water pressure of large-diameter cylinder parts, which aims to solve the technical problem of simulating the working condition in an underwater working environment.
In order to achieve the purpose, the device for testing the external water pressure of the large-diameter cylinder part comprises the following specific technical scheme:
the device for the external water pressure test of the large-diameter cylinder part comprises a support 1, a lower sealing head 2, a lower flange 3, an upper flange 4, a cylinder 8, lifting lugs 9, a pressure monitoring pipe 16, a water injection pipe 19, an inner sealing head 23, a discharge pipe 25, a manhole 26 and an upper sealing head 27; lifting lugs 9 are arranged above the cylinder 8, and an upper flange 4 is arranged at the bottom edge of the cylinder 8; the top edge of the lower seal head 2 is provided with a lower flange 3, and the upper flange and the lower flange are fixedly connected; the bottom of the lower seal head 2 is provided with a support 1; the top of the cylinder body 8 is provided with a connecting pipe, and the connecting pipe is provided with a ball valve; a water injection pipe 19 is arranged on the side surface of the cylinder 8, and a ball valve is arranged on the water injection pipe; the water injection pipe 19 is communicated with the pressure monitoring pipe 16; the inner seal head 23 is fixed above the lower seal head 2; the upper seal head 27 and the inner wall of the cylinder body are welded into a whole; the inner end enclosure is provided with a manhole, and the bottom of the lower end enclosure is provided with a discharge pipe 25.
Wherein, form the sealed face between upper and lower flange.
Wherein a pressure gauge is mounted on the pressure detecting tube 16.
A lower support 24 is also included for connecting the lower head to the inner head.
An upper support 22 is also included for connecting the lower head and the inner head.
A stud 5 is also included for connecting the upper flange 4 and the lower flange 3.
The pressure test device also comprises an inner flange 20 which is welded with the inner sealing head into a whole and is used for being connected with a flange of the pressure test part.
The elliptical head has even stress distribution and good mechanical property, and achieves good sealing effect, so that the upper end part, the lower end part, the inner side and the part to be subjected to hydrostatic test are in the form of the elliptical head.
Wherein, the blast pipe is equipped with at upper head top for the exhaust of air is done in the water injection process.
Wherein, be provided with O type sealing washer between upper flange 4 and the lower flange 3.
The device for testing the external water pressure of the large-diameter cylinder part has the following advantages: compared with the prior art, the external hydraulic pressure test device simulates the working condition of actual use, and the device can test whether the tightness and the overall strength of the pressed part can meet the use requirement under specific pressure, so that the device has the effects of checking the compressive strength and tightness of the pressed part and finding defects in time.
Drawings
FIG. 1 is a schematic diagram of the structure of the device for testing the external water pressure of a large-diameter cylinder part;
FIG. 2 is a schematic diagram of the structure of a part to be pressed;
FIG. 3 is a schematic view of the mounting of components to a hydraulic device;
fig. 4 is a schematic view of the structure of the upper and lower flanges.
Detailed Description
In order to better understand the purpose, structure and function of the present invention, the following describes in detail a device for testing the external water pressure of large diameter cylinder parts according to the present invention with reference to the accompanying drawings.
As shown in fig. 1-4, the device for testing the external water pressure of the large-diameter cylinder part comprises a support 1, a lower sealing head 2, a lower flange 3, an upper flange 4, a double-end stud 5, a first nut 6, a sealing ring 7, a cylinder 8, a lifting lug 9, a first connecting pipe 10, a first flange 11, a first ball valve 12, a first stud 13, a second nut 14, a second connecting pipe 15, a pressure monitoring pipe 16, a second ball valve 17, a second flange 18, a water injection pipe 19, an inner flange 20, a second stud 21, an upper support 22, an inner sealing head 23, a lower support 24, a discharge pipe 25, a manhole 26 and an upper sealing head 27.
The support 1 is used for supporting the whole external water pressure test device and erecting the whole device;
the lower seal head 2, the lower flange 3 and the support 1 are welded into a whole to form a closed space;
the lower flange 3 and the lower sealing head 2 are welded into a movable lower half section for being connected with the upper flange;
the upper flange 4 and the cylinder 8 are welded into a whole and are used for being connected with the lower flange;
a stud 5 for connecting the upper flange 4 and the lower flange 3;
the first nut 6 is used for tightening and fixing the upper flange 4 and the lower flange 3;
the sealing ring 7 is used for sealing the upper flange and the lower flange through an upper flange sealing groove and a lower flange sealing groove;
a cylinder 8 for connecting the upper seal head 27 and the lower seal head 2;
lifting lugs 9 for lifting in the external pressure test process;
one end of the first connecting pipe 10 is connected with the upper sealing head 27, and the other end is connected with the first flange 11 for drainage and exhaust;
the flange I11 and the connecting pipe 10 are welded into a whole and are used for being connected with a ball valve;
a first ball valve 12 for fluid regulation and control by opening and closing the first ball valve;
the first stud 13 is used for connecting the first flange 11 and the first ball valve 12;
a second nut 14 for fastening the first flange 11 and the first ball valve 12;
the second connecting pipe 15 is connected with the first ball valve 12 and is used for draining and exhausting;
the pressure detection tube 16 is used for installing a pressure gauge and monitoring the pressing pressure in real time;
a second ball valve 17 for fluid regulation and control by opening and closing the ball valve;
the second flange 18 is welded with the water injection pipe 19 into a whole and is used for being connected with a ball valve;
the water injection pipe 19 and the flange II are welded into a whole to provide a medium inlet for the water injection pipe;
the inner flange 20 is welded with the inner sealing head into a whole and is used for being connected with a flange of the pressure test part;
the second stud 21 is used for fastening the inner sealing head and the pressure test part;
an upper support 22 for connecting the lower head and the inner head;
the inner seal head 23 and the inner flange are welded into a whole, and the inner seal head is provided with holes for observing the inside of the inner seal head by people;
the lower support 24 is used for connecting the lower end socket and the inner end socket;
a drain pipe 25 for draining water in the container;
a manhole 26 for observing deformation condition when a person enters the inside of the container;
the upper seal head 27 is welded with the cylinder body into a whole body to form a closed space.
Preferably, the inner sealing head is provided with a manhole, so that a person can conveniently put in the strain gauge to observe the deformation condition of the part and whether leakage occurs;
preferably, because the stress of the elliptical head is uniformly distributed, the mechanical property is good, and a good sealing effect is achieved, the upper end part, the lower end part, the inner side and the part to be tested in a hydrostatic test support part are all in the form of elliptical heads;
preferably, a pressure detection tube is arranged above the water injection tube of the hydrostatic test device and is used for monitoring pressure in the pressurizing process;
preferably, the top of the upper sealing head of the hydrostatic test device is provided with an exhaust pipe for exhausting air in the water injection process;
preferably, a discharge pipe is arranged at the bottom of the lower end socket of the hydrostatic test device and used for exhausting fluid after the pressing is finished.
The specific working process of the device is as follows:
implementation background: as shown in figure 2, the existing large-diameter thin-wall long cylinder part has the total length of 7000mm, the inner diameter of phi 2200mm and the outer diameter of phi 2270mm, requires an external hydraulic test of 4.5MPa, and is kept for 30min, so that leakage and damage cannot occur.
1. As shown in fig. 3, the part to be subjected to the hydraulic test is inverted, the flange face is downward, the part to be subjected to the hydraulic test is hoisted and placed on the flange 20 in the hydraulic device, bolt holes are aligned and attached to the flange face, an O-shaped sealing ring is pressed into a sealing groove of the flange face, and the part to be subjected to the hydraulic test is tightly held by bolts.
2. As shown in fig. 1, the upper cylinder assembly is hoisted to an external water pressure device, an O-shaped sealing ring is pressed into sealing grooves of an upper flange 4 and a lower flange 3, and the sealing rings are tightly fastened through a stud 5, a nut 6 and a sealing ring 7.
3. And opening an exhaust valve at the top of the upper sealing head, closing a valve of the discharge pipe 25, connecting the water injection device, and injecting water into the water pressure device through the water injection pipe.
4. And observing the exhaust pipe at the top of the upper end socket in the water injection process, and stopping water injection after the exhaust pipe 15 starts overflowing. Standing for 5min, checking whether the water pressure device has leakage, if not, closing the valve of the exhaust pipe 15, connecting the pressurizing pump to the water injection pipe 19, starting the pressurizing pump, slowly pressurizing to 0.5MPa, 1MPa, 2MPa, 3MPa and 4MPa, maintaining the pressure for 5min, and continuing pressurizing to 4.5MPa after confirming that no leakage exists. And (3) maintaining the pressure for 30min under the pressure of 4.5Mpa, and observing the change condition of the pressure value through the pressure appearance.
5. During the pressure maintaining, the deformation condition and the leakage condition of the part are observed through the manhole into the part.
6. Opening the discharge pipe 25 to reduce the pressure and drain water, opening the drain valve to reduce the pressure slowly, maintaining the pressure for 5min under the pressure of 4MPa, 3MPa, 2MPa and 1MPa respectively, and continuing to reduce the pressure after confirming no leakage until the water in the pressurizing device is drained.
7. Unscrewing the stud 5 and the first nut 6, hoisting the upper cylinder assembly to a storage area, disassembling the pressed part, and then placing the pressed part back to the storage area. Thus, the external water pressure test is completed.
The external hydraulic test device can complete hydraulic tests of parts with different specifications by only replacing the inner sealing head and the inner flange for the to-be-tested hydraulic test devices with different specifications (the external diameter phi 2000 mm-phi 2600 mm).
Although embodiments of the present invention have been described in conjunction with the accompanying drawings, it will be apparent to those skilled in the art that several variations and modifications may be made without departing from the principles of the invention, which are also considered to be within the scope of the invention.

Claims (10)

1.一种大直径筒类零件外水压试验的装置，其特征在于，包括支座(1)、下封头(2)、下法兰(3)、上法兰(4)、筒体(8)、吊耳(9)、压力监测管(16)、注水管(19)、内封头(23)、泄放管(25)、人孔(26)、上封头(27)；1. A device for external hydraulic pressure testing of large-diameter cylindrical parts, which is characterized by including a support (1), a lower head (2), a lower flange (3), an upper flange (4), and a cylinder (8), lifting lugs (9), pressure monitoring pipe (16), water injection pipe (19), inner head (23), relief pipe (25), manhole (26), upper head (27); 所述筒体(8)上方设置有吊耳(9)，所述筒体(8)底部边缘设置上法兰(4)；所述下封头(2)顶部边缘设置有下法兰(3)，所述上、下法兰固定连接；所述下封头(2)底部设置有支座(1)；所述筒体(8)顶部设置有接管，所述接管上设置有球阀；Lifting lugs (9) are provided above the barrel (8), and an upper flange (4) is provided at the bottom edge of the barrel (8); a lower flange (3) is provided at the top edge of the lower head (2). ), the upper and lower flanges are fixedly connected; the bottom of the lower head (2) is provided with a support (1); the top of the barrel (8) is provided with a nozzle, and the nozzle is provided with a ball valve; 所述筒体(8)侧面设置有注水管(19)，所述注水管上设置有球阀；所述注水管(19)与压力监测管(16)连通；A water injection pipe (19) is provided on the side of the cylinder (8), and a ball valve is provided on the water injection pipe; the water injection pipe (19) is connected with the pressure monitoring pipe (16); 所述内封头(23)固定在下封头(2)上方；所述上封头(27)和筒体内壁焊接为一体；所述内封头上开有人孔，The inner head (23) is fixed above the lower head (2); the upper head (27) and the inner wall of the cylinder are welded into one body; a manhole is opened on the inner head. 下封头底部装有泄放管(25)。A discharge pipe (25) is installed at the bottom of the lower head. 2.根据权利要求1所述的大直径筒类零件外水压试验的装置，其特征在于，所述上、下法兰之间形成密封面。2. The device for external hydraulic pressure testing of large-diameter cylindrical parts according to claim 1, characterized in that a sealing surface is formed between the upper and lower flanges. 3.根据权利要求1所述的大直径筒类零件外水压试验的装置，其特征在于，所述压力检测管(16)上安装压力表。3. The device for external hydraulic pressure testing of large-diameter cylindrical parts according to claim 1, characterized in that a pressure gauge is installed on the pressure detection pipe (16). 4.根据权利要求1所述的大直径筒类零件外水压试验的装置，其特征在于，还包括下支撑(24)，用于连接下封头和内封头。4. The device for external hydraulic pressure testing of large-diameter cylindrical parts according to claim 1, characterized in that it also includes a lower support (24) for connecting the lower head and the inner head. 5.根据权利要求1所述的大直径筒类零件外水压试验的装置，其特征在于，还包括上支撑(22)，用于连接下封头和内封头。5. The device for external hydraulic pressure testing of large-diameter cylindrical parts according to claim 1, characterized in that it also includes an upper support (22) for connecting the lower head and the inner head. 6.根据权利要求1所述的大直径筒类零件外水压试验的装置，其特征在于，还包括双头螺柱(5)，用于连接上法兰(4)和下法兰(3)。6. The device for external hydraulic pressure testing of large-diameter cylindrical parts according to claim 1, characterized in that it also includes double-headed studs (5) for connecting the upper flange (4) and the lower flange (3). ). 7.根据权利要求1所述的大直径筒类零件外水压试验的装置，其特征在于，还包括内法兰(20)，和内封头焊接为一体，用于和试压零件的法兰相连接。7. The device for external hydraulic pressure testing of large-diameter cylindrical parts according to claim 1, characterized in that it also includes an inner flange (20), which is welded to the inner head and is used for connecting to the pressure test parts. Orchid is connected. 8.根据权利要求1所述的大直径筒类零件外水压试验的装置，其特征在于，因椭圆封头应力分布均匀，力学性能好，达到很好的密封作用，故上下端部以及内侧与待水压试验零件支撑处均采用椭圆封头的形式。8. The device for external hydraulic pressure testing of large-diameter cylindrical parts according to claim 1, characterized in that because the elliptical head has uniform stress distribution, good mechanical properties, and achieves a good sealing effect, the upper and lower ends and the inner side The support parts of the parts to be tested by hydraulic pressure are all in the form of elliptical heads. 9.根据权利要求1所述的大直径筒类零件外水压试验的装置，其特征在于，上封头顶部装有排气管，用于注水过程中空气的排尽。9. The device for external hydraulic pressure testing of large-diameter cylindrical parts according to claim 1, characterized in that an exhaust pipe is installed on the top of the upper head for exhausting air during the water injection process. 10.根据权利要求1所述的大直径筒类零件外水压试验的装置，其特征在于，上法兰(4)和下法兰(3)之间设置有O型密封圈。10. The device for external hydraulic pressure testing of large-diameter cylindrical parts according to claim 1, characterized in that an O-ring is provided between the upper flange (4) and the lower flange (3).
CN202311024100.3A 2023-08-15 2023-08-15 A device for external hydraulic pressure testing of large-diameter cylindrical parts Pending CN117109833A (en)

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Application Number Priority Date Filing Date Title
CN202311024100.3A CN117109833A (en) 2023-08-15 2023-08-15 A device for external hydraulic pressure testing of large-diameter cylindrical parts

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Application Number Priority Date Filing Date Title
CN202311024100.3A CN117109833A (en) 2023-08-15 2023-08-15 A device for external hydraulic pressure testing of large-diameter cylindrical parts

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN120593972A (en) * 2025-08-06 2025-09-05 东方电气集团东方电机有限公司 A pressure test tool for impulse turbine nozzle and mouth ring and its assembly and test method

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN204807283U (en) * 2015-06-24 2015-11-25 中国航天科技集团公司长征机械厂 Integrative combination formula airtight test anchor clamps of interior external pressure
CN110823469A (en) * 2019-12-19 2020-02-21 江南工业集团有限公司 An internal and external pressure test device and method for a watertight connection seat
CN217211850U (en) * 2022-01-06 2022-08-16 新疆胜新复合材料有限公司 Pipeline external pressure test device

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN204807283U (en) * 2015-06-24 2015-11-25 中国航天科技集团公司长征机械厂 Integrative combination formula airtight test anchor clamps of interior external pressure
CN110823469A (en) * 2019-12-19 2020-02-21 江南工业集团有限公司 An internal and external pressure test device and method for a watertight connection seat
CN217211850U (en) * 2022-01-06 2022-08-16 新疆胜新复合材料有限公司 Pipeline external pressure test device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN120593972A (en) * 2025-08-06 2025-09-05 东方电气集团东方电机有限公司 A pressure test tool for impulse turbine nozzle and mouth ring and its assembly and test method

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