Hydraulic pressure testing device and method for pressure vessel

Abstract

The present disclosure discloses a water pressure testing device and method for a pressure vessel. The water pressure testing device for the pressure vessel comprises a plurality of connecting parts, a plurality of airbags, a tension rod, an air charging device and a water injection device. The plurality of connecting parts are pre-set and fixed on the inner wall surface of the pressure vessel at intervals. The plurality of airbags are used to be placed in the pressure vessel, connected to the connecting parts, and not in contact with the inner wall surface of the pressure vessel. The tension rod is arranged corresponding to the connecting parts, connected to the outer wall surface of the pressure vessel, and applies an outward pulling force to the pressure vessel. The air charging device passes through the manhole of the pressure vessel, communicates with the airbag, and inflates the airbag. The water injection device is docked with the liquid inlet and outlet of the pressure vessel to inject water into the pressure vessel. The water pressure testing device for a pressure vessel disclosed in the present disclosure reduces the waste of water during the water pressure testing of the pressure vessel by adding airbags into the pressure vessel.

Description

Technical Field

[0001] The present disclosure relates to the technical field of pressure vessels, and in particular to a water pressure testing device and method for a pressure vessel. Background Art

[0002] In the prior art, when performing a hydraulic pressure test on a pressure vessel, it is necessary to fill the pressure vessel with water of a certain pressure and then check whether the pressure vessel has leakage, deformation, or abnormal noise. This results in a large amount of water resources being consumed each time the hydraulic pressure test is performed. Especially in some areas where water resources are scarce, the existing measurement method will cause serious waste of water resources. Summary of the invention

[0003] The purpose of the present disclosure is to solve the problem that the water pressure testing method of the pressure vessel in the prior art easily causes waste of water resources.

[0004] In order to solve the above technical problems, the present disclosure adopts the following technical solutions:

[0005] According to one aspect of the present disclosure, the present disclosure provides a water pressure testing device for a pressure vessel, comprising a plurality of connecting members, a plurality of airbags, a tension rod, an inflation device, and a water injection device. The plurality of connecting members are pre-spaced and fixed on the inner wall surface of the pressure vessel. The plurality of airbags are used to be placed in the pressure vessel, connected to the connecting members, and not in contact with the inner wall surface of the pressure vessel. The tension rod is arranged corresponding to the connecting member, connected to the outer wall surface of the pressure vessel, and applies an outward pulling force to the pressure vessel. The inflation device passes through the manhole of the pressure vessel, communicates with the airbag, and inflates the airbag. The water injection device is connected to the liquid inlet and outlet of the pressure vessel to inject water into the pressure vessel.

[0006] According to one aspect of the present disclosure, the present disclosure provides a method for testing a pressure vessel under water pressure, comprising:

[0007] An outward pulling force is applied to the pressure container through the tension rod.

[0008] A plurality of air bags are placed in the pressure vessel at intervals through a manhole of the pressure vessel.

[0009] An initial volume of gas is pumped into the balloon.

[0010] Water is poured into the pressure vessel until the airbag floats up, and it is ensured that the airbag does not contact the inner wall surface of the pressure vessel.

[0011] Gas is pumped into the air bag so that the pressure of the air bag reaches the predetermined test pressure of the pressure vessel.

[0012] The manhole is sealed, and water is injected into the pressure vessel until the pressure in the pressure vessel reaches a predetermined test pressure, and the pressure vessel is inspected to determine whether the pressure vessel has leakage, deformation, or abnormal sound.

[0013] It can be seen from the above technical solutions that the present disclosure has at least the following advantages and positive effects:

[0014] The water pressure testing device for a pressure vessel disclosed herein occupies a large amount of space in the pressure vessel by filling a plurality of air bags in the pressure vessel, thereby effectively reducing the volume of water injected into the pressure vessel during the water pressure test, thereby reducing the waste of water resources during the water pressure test of the pressure vessel. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of a water pressure testing device for a pressure vessel according to an embodiment of the present disclosure.

[0016] Figure 2 yes Figure 1 A schematic diagram of the connection structure of the tension rods of an embodiment of a water pressure testing device for a pressure vessel is shown.

[0017] Figure 3 yes Figure 1 A schematic diagram of the connection structure of tension rods of another embodiment of a water pressure testing device for a pressure vessel is shown.

[0018] Figure 4 It is a structural schematic diagram of a water pressure testing device for a pressure vessel according to an embodiment of the present disclosure.

[0019] Figure 5 It is a structural schematic diagram of a water pressure testing device for a pressure vessel according to another embodiment of the present disclosure.

[0020] Figure 6 The present invention is a flowchart of a method for testing a pressure vessel according to an embodiment of the present invention.

[0021] 1. Pressure vessel; 11. Manhole; 12. Liquid inlet and outlet; 2. Water pressure test device; 100. Connectors; 200. Airbag; 201. Upper unit; 202. Middle unit; 203. Lower unit; 204. Hook; 205. Connecting pipe; 206. Connecting pipe; 210. Bag; 220. Conical head; 230. Conical head; 221. Hook; 231. Air inlet; 310. Tension rod; 320. Tension gauge; 330. Buried bolt; 340. Tension gauge; 400. Inflating device; 410. Air pipe; 411. Main air pipe; 412. Air distribution pipe; 413. Main pipe; 414. Branch pipe; 500. Water injection device; 510. Water pipe; 600. Fixing parts. DETAILED DESCRIPTION

[0022] Although the present disclosure can be easily embodied in different forms of embodiments, only some of the specific embodiments are shown in the drawings and will be described in detail in this specification. It should be understood that this description should be regarded as an exemplary illustration of the principles of the present disclosure and is not intended to limit the present disclosure to that described herein.

[0023] Thus, a feature indicated in this specification will be used to illustrate one of the features of an embodiment of the present disclosure, rather than implying that each embodiment of the present disclosure must have the described feature. In addition, it should be noted that this specification describes many features. Although some features can be combined together to illustrate possible system designs, these features can also be used in other combinations that are not explicitly described. Thus, unless otherwise stated, the described combinations are not intended to be limiting.

[0024] In the embodiments shown in the drawings, the indications of directions (such as up, down, left, right, front and back) used to explain the structure and movement of various elements of the present disclosure are not absolute but relative. These descriptions are appropriate when these elements are in the positions shown in the drawings. If the description of the positions of these elements changes, the indications of these directions also change accordingly.

[0025] In conjunction with the drawings of this specification, some embodiments of the present disclosure are further described in detail below. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0026] See also Figure 1 The present disclosure provides a water pressure testing device 2 for a pressure vessel 1, which is used to perform a water pressure test on the pressure vessel 1. The pressure vessel 1 can be a horizontal tank, a vertical tank, a spherical tank, etc., and is used for medium storage, medium physical and chemical reactions, medium heat exchange, medium fluid pressure buffering and gas separation, etc.

[0027] The above-mentioned water pressure testing device 2 includes a plurality of connecting parts 100 pre-spaced and fixed on the inner wall surface of the pressure vessel 1, a plurality of airbags 200 connected to the connecting parts 100, tension rods 310 arranged corresponding to the connecting parts 100, an inflation device 400 connected to the airbags 200 and inflating the airbags 200, and a water injection device 500 for injecting water into the pressure vessel 1.

[0028] The connecting member 100 may be a lifting ring, a hook, a slot, a connecting plate, etc., and the airbag 200 may be connected and fixed to the connecting member 100 by means of clamping, hooking, and rope binding. In the subsequent embodiments of the present disclosure, the connecting member 100 is taken as an example for explanation. When performing a hydraulic pressure test, the airbag 200 is placed in the pressure vessel 1 and cannot contact the inner wall surface of the pressure vessel 1. Therefore, in the embodiments of the present disclosure, hooking and binding connection are generally adopted to better ensure that the airbag 200 does not contact the inner wall surface of the pressure vessel 1 during the hydraulic pressure test. The tension rod 310 is arranged corresponding to the connecting member 100, connected to the outer wall surface of the pressure vessel 1, and the other end is tightly connected to the ground, wall, etc. The ground, wall, etc. apply a pulling force to the tension member in a direction away from the pressure vessel 1, so as to apply an outward pulling force to the pressure vessel 1, balance the inward pulling force generated by the floating of the airbag on the inner wall surface of the pressure vessel 1, ensure the stress balance at various places of the shell wall of the pressure vessel 1, and thus ensure the safety and accuracy of the hydraulic pressure test. The inflating device 400 includes an air pipe 410 passing through the manhole 11 of the pressure vessel 1 and communicating with the air bag 200, and the inflating device 400 inflates the air bag 200 through the air pipe 410. The water injection device 500 includes a water pipe 510 connected to the liquid inlet and outlet 12 of the pressure vessel 1, and the water injection device 500 injects water into the pressure vessel 1 through the water pipe 510.

[0029] In some embodiments of the present disclosure, the pressure vessel 1 is a horizontal storage tank. The connector 100 can be arranged at intervals along the axial direction of the pressure vessel 1 at the bottom or both sides of the pressure vessel 1, and have an interval with the manhole 11 and the liquid inlet and outlet 12 in the axial direction of the pressure vessel 1 to leave the manhole 11 channel and the liquid inlet and outlet channel in the pressure vessel 1 empty.

[0030] When the connector 100 is disposed at the bottom of the pressure vessel 1, it is independently disposed, and each connector 100 is correspondingly connected to one airbag 200. When the connector 100 is disposed on both sides of the pressure vessel 1, in order to ensure that the airbag 200 does not contact the inner wall surface of the pressure vessel 1, it is disposed in pairs on both sides of the pressure vessel 1, and each pair of connectors 100 is correspondingly connected to one airbag 200.

[0031] Please refer to Figure 2In one embodiment of the present disclosure, the above-mentioned connecting member 100 is arranged at the bottom of the pressure vessel 1, and the tension rod 310 is correspondingly arranged vertically at the bottom of the pressure vessel 1, and the bottom end of the tension rod 310 is also connected to the tension gauge 320. The top of the tension gauge 320 is provided with a threaded interface, and the bottom end of the tension rod 310 is connected to the tension gauge 320 through the threaded interface. At the same time, the tension gauge 320 is adjustably fastened to the ground through the buried bolt 330, so that the tension gauge 320 is pulled. At this time, the tension gauge 320 displays the tension of the tension rod 310, which is also the tension of the outer wall of the pressure vessel 1. When the tension value displayed is equal to the calculated buoyancy value of the airbag, the tension inside and outside the pressure vessel 1 is balanced.

[0032] Please refer to Figure 3 In another embodiment of the present disclosure, fixing members 600 corresponding to the connecting members 100 are pre-fixed on the outer wall surface of the pressure vessel 1 at intervals. The tension rod 310 is connected to the outer wall surface of the pressure vessel 1 through the fixing member 600. The fixing member 600 may be a lifting ring, a hook, a slot, a connecting plate, etc. The tension rod 310 may be connected and fixed to the fixing member 600 by means of connection methods such as snap connection, hook connection, and hinge connection. The bottom end of the tension rod 310 is fastened to the ground by an underground bolt 330, so that the tension rod 310 is tensioned. At the same time, a strain gauge for the tension gauge 340 is also attached to the tension rod 310, and the tension gauge 340 measures the tension of the tension rod 310 by the degree of deformation of the strain gauge.

[0033] In another embodiment of the present disclosure, the above-mentioned connecting member 100 is arranged on both sides of the pressure vessel 1, and the tension rod 310 is correspondingly vertically arranged on both sides of the pressure vessel 1, and applies pressure to the outer wall surface of the pressure vessel 1 in the opposite direction of the connecting member 100.

[0034] Please refer to Figure 4In the above embodiment, since the connecting member 100 is disposed at the bottom of the pressure vessel 1, a hook 221 is correspondingly disposed at the bottom of the airbag 200. In some embodiments, the airbag 200 includes a cylindrical sac body 210 and conical heads 220 and 230 disposed at both ends of the sac body 210. The conical head 220 at the bottom is provided with a hook 221, and the conical head 230 at the top is provided with an air inlet 231, which is connected to the inflation device 400 and serves as an inlet for inflation of the inflation device 400. At the same time, correspondingly, the air pipe 410 of the inflation device 400 includes a plurality of air branch pipes 412 corresponding to each airbag 200 and a main air pipe 411 connected to each air branch pipe 411. Each branch air pipe 412 is connected to the air inlet 231 of the corresponding air bag 200, and is collectively connected to the main air pipe 411. The main air pipe 411 passes through the manhole 11 and is connected to a high-pressure air source such as an air compressor and a high-pressure gas tank for inflating the air bag 200, so as to facilitate the control of the air pressure in each air bag 200 to remain consistent, while reducing the number of air pipes to avoid entanglement and knotting due to too many air pipes, and facilitating maintenance and care during use. At the same time, the number of high-pressure air sources such as compressors can also be reduced, which helps to reduce costs. In other embodiments, multiple inflatable devices 400 can also be used, each of which is connected to an air bag 200 to inflate an air bag 200.

[0035] Please refer to Figure 5 In other embodiments of the present disclosure, the pressure vessel 1 is a spherical tank with a larger volume. The connector 100 can be arranged at the bottom of the pressure vessel 1 around the bottom center of the pressure vessel 1, and the connector 100 can also be arranged at the bottom center of the pressure vessel 1. The connector 100 is spaced apart from the manhole 11 and the liquid inlet and outlet 12 in the horizontal direction, so as to be staggered with the manhole channel and the liquid inlet and outlet channel in the pressure vessel 1 to avoid interference with the manhole channel and the liquid inlet and outlet channel.

[0036] In the above embodiment, since the pressure vessel 1 has a large volume, the airbag 200 includes a plurality of airbag units connected in series vertically. The number of airbag units included in each airbag 200 is related to the size of the pressure vessel 1, and the size of each airbag unit is also related to the size of the pressure vessel 1. Generally, the number of airbag units of the airbag 200 located in the middle of the pressure vessel 1 is preferably 3, and the number of airbag units of the airbag 200 located at the periphery of the pressure vessel 1 is preferably 2, so as to avoid uneven pressure distribution of each airbag unit in the airbag due to too many airbag units, thereby causing insufficient pressure in some airbag units after inflation.

[0037] When there are three airbag units, they are respectively an upper unit 201, a middle unit 202 and a lower unit 203. The lower unit 203 is provided with a hook 204 corresponding to the connector 100 at the bottom, and a connecting pipe 205 connected to the bottom of the middle unit 202 at the top. The bottom of the middle unit 202 is connected to the top of the lower unit 203 through the connecting pipe 205, and a connecting pipe 206 connected to the bottom of the upper unit 201 is provided at the top. The bottom of the upper unit 201 is connected to the top of the middle unit 202 through the connecting pipe 206.

[0038] When there are two airbag units, they are an upper unit 201 and a lower unit 203. The lower unit 203 has a hook 204 corresponding to the connector 100 at the bottom and a connecting pipe 205 connected to the bottom of the upper unit 201 at the top. The bottom of the upper unit 201 is connected to the top of the lower unit 203 through the connecting pipe 205.

[0039] At the same time, the air pipe 410 of the inflation device 400 includes a main pipe 413 that passes through the manhole 11 and enters the pressure vessel 1, and multiple branch pipes 414 that extend radially from the main pipe along the pressure vessel 1. Each branch pipe 414 is provided with multiple inflation ports to communicate with the connecting pipe 205 at the top of the lower unit 203 of the airbag 200 in the radial direction, and inflate each airbag unit in the airbag. The main air pipe 413 passes through the manhole 11 and is connected to a high-pressure air source such as an air compressor and a high-pressure gas tank that inflate the airbag 200, so as to facilitate the control of the air pressure in each airbag 200 to remain consistent, and further reduce the number of air pipes to avoid entanglement and knotting due to too many air pipes, which is convenient for maintenance and care during use.

[0040] Please refer to Figure 6 The present disclosure also provides a method for testing a pressure vessel 1 using a hydraulic pressure test device 2. The method for testing a pressure vessel 1 using a hydraulic pressure test device 2 includes:

[0041] Step S101: applying an outward pulling force to the pressure vessel through the tension rod.

[0042] Before the water pressure test, an outward pulling force needs to be applied to the position of the outer wall of the pressure vessel 1 corresponding to the connector 100 to balance the pulling force of the airbag 200 at this position of the pressure vessel 1. This step can be completed before or after any step before the pressure vessel 1 is filled with water for pressurization.

[0043] Step S110, placing a plurality of air bags in the pressure vessel at intervals through a manhole of the pressure vessel.

[0044] Before conducting a water pressure test, the airbags 200 need to be placed in the pressure vessel 1 and each airbag 200 needs to be connected and fixed to its corresponding connector 100 to prevent the airbags from floating freely in the pressure vessel 1 after being inflated and from scratching the inner wall of the pressure vessel 1, causing leakage of the airbags 200 or other dangerous situations.

[0045] Step S120: pumping an initial volume of gas into the airbag.

[0046] After the airbag 200 is placed in the pressure vessel 1, the inflation device 400 can be started to pump an initial volume of gas into the airbag 200 to ensure that the airbag 200 is slightly inflated, to avoid difficulty in inflating the airbag 200 after water injection due to adhesion of the inner wall of the airbag 200, and to prevent the airbag 200 from being unable to float after water injection in subsequent steps.

[0047] Step S130, injecting water into the pressure vessel until the airbag floats up, and ensuring that the airbag does not contact the inner wall surface of the pressure vessel.

[0048] After ensuring that there is a portion of air in the airbag 200, a predetermined amount of water needs to be injected into the pressure vessel to ensure that the airbag 200 floats and is pulled, and to tighten the connector 100. This prevents the airbag 200 from shaking during the inflation process and rubbing against the inner wall of the pressure vessel 1. In this step, the amount of water injected generally accounts for less than 1 / 4 of the volume of the pressure vessel 1.

[0049] Step S140, pumping gas into the airbag to make the pressure of the airbag reach a predetermined test pressure.

[0050] After ensuring that the airbag 200 does not contact the inner wall of the pressure vessel 1, the airbag 200 can be inflated again until the pressure in the airbag 200 reaches the pressure test pressure of the pressure vessel 1. At this time, most of the space in the pressure vessel 1 has been filled with the airbag 200, and only a small amount of space remains to be filled with water.

[0051] Step S150, seal the manhole, inject water into the pressure vessel until the pressure in the pressure vessel reaches a predetermined test pressure, and inspect the pressure vessel to determine whether the pressure vessel has leakage, deformation, or abnormal sound.

[0052] After the airbag 200 is inflated, the air pipe 410 of the inflator 400 can be removed from the airbag 200, and the air inlet 231 of the airbag 200 is blocked. Then the manhole 12 is sealed. Water is poured into the pressure vessel 1 until the pressure in the pressure vessel 1 reaches the predetermined test pressure. Then the pressure vessel 1 is inspected. If the pressure vessel 1 has no leakage, deformation, or abnormal sound, the pressure vessel 1 is qualified, otherwise the pressure vessel 1 is unqualified. The specific steps of the above step S150 include:

[0053] The manhole is sealed, and water is poured into the pressure vessel 1 until the entire pressure vessel 1 is filled. Then, when the temperature of the shell wall of the pressure vessel 1 is consistent with the temperature of the water therein, the pressure vessel 1 is pressurized so that the pressure in the pressure vessel 1 reaches a predetermined test pressure. Then the pressure vessel 1 can be inspected. The predetermined test pressure in this embodiment is the pressure value that needs to be reached when performing a water pressure test. The specific value can refer to the national standard "GB150.4-2011", which will not be elaborated in this disclosure.

[0054] The present disclosure adopts the water pressure testing device and method of the pressure vessel 1 mentioned above, and adopts multiple air bags 200 to occupy a large amount of space in the pressure vessel 1, so that only a small amount of water needs to be injected into the pressure vessel to perform the water pressure test, so that the water consumption of the entire water pressure test is reduced to less than 1 / 3 of the previous one, thereby reducing the waste of water resources caused by the water pressure test in the pressure vessel 1.

[0055] Although the present disclosure has been described with reference to several typical embodiments, it should be understood that the terms used are illustrative and exemplary, rather than restrictive. Since the present disclosure can be embodied in a variety of forms without departing from the spirit or essence of the invention, it should be understood that the above embodiments are not limited to any of the foregoing details, but should be interpreted broadly within the spirit and scope defined by the appended claims, so all changes and modifications falling within the scope of the claims or their equivalents should be covered by the appended claims.

Claims

1. A hydraulic pressure testing device for a pressure vessel, characterized in that: include: A plurality of connecting pieces are pre-fixed and spaced apart on the inner wall surface of the pressure vessel, and the connecting pieces are arranged at the bottom of the pressure vessel; A plurality of air bags, which are used to be placed in the pressure container, wherein the air bags are connected to the connecting member and do not contact the inner wall surface of the pressure container; A tension rod is arranged corresponding to the connecting piece, the tension rod is arranged vertically and connected to the outer wall surface of the pressure vessel, and applies tension to the outer wall surface of the pressure vessel in the direction opposite to the connecting piece, so as to balance the inward tension on the inner wall surface of the pressure vessel caused by the buoyancy of the airbag, thereby ensuring the stress balance at various locations of the shell wall of the pressure vessel; an inflating device, passing through the manhole of the pressure vessel, communicating with the air bag, and inflating the air bag; A water injection device connected to the liquid inlet and outlet of the pressure vessel to inject water into the pressure vessel; Wherein, the water pressure testing method of the pressure vessel comprises: Placing a plurality of air bags in the pressure vessel at intervals through a manhole of the pressure vessel; Pumping an initial volume of gas into the airbag; Filling water into the pressure vessel until the airbag floats up, and ensuring that the airbag does not contact the inner wall surface of the pressure vessel; Pumping gas into the air bag so that the pressure of the air bag reaches the predetermined test pressure of the pressure vessel; The manhole is sealed, water is injected into the pressure vessel, and while the airbag floats, an outward pulling force balancing the buoyancy is slowly applied to the pressure vessel through the tension rod; until the pressure in the pressure vessel reaches a predetermined test pressure, the pressure vessel is inspected to determine whether the pressure vessel has leakage, deformation, and abnormal noise.

2. The water pressure testing device for a pressure vessel according to claim 1, characterized in that: A tension gauge is also provided on the tension rod, and the bottom end of the tension rod is adjustably fastened to the ground through buried bolts, so that the tension rod is tightened.

3. The water pressure testing device for a pressure vessel according to claim 1, characterized in that: The connecting piece is a lifting ring, and a lifting hook is correspondingly arranged at the bottom of the airbag, and the lifting hook is hooked with the connecting piece.

4. The water pressure testing device for a pressure vessel according to claim 3, characterized in that: The airbag comprises a cylindrical bag body and conical heads arranged at two ends of the bag body, and the conical head located at the bottom is provided with the hook.

5. The water pressure testing device for a pressure vessel according to claim 3, characterized in that: The airbag comprises a plurality of airbag units connected in a vertical direction; the top of the airbag unit at the bottom is communicated with and connected to the bottom of the airbag unit at the top, and the bottom of the airbag unit is provided with the hook.

6. The water pressure testing device for a pressure vessel according to claim 1, characterized in that: The airbag is provided with an air inlet; the inflation device includes an air pipe passing through a manhole of the pressure vessel and connected to the air inlet, and the air pipe includes a main air pipe passing through the manhole and a plurality of branch air pipes connected from the main air pipe to each corresponding air inlet.

7. The water pressure testing device for a pressure vessel according to claim 1, characterized in that: It also includes a fixing piece corresponding to the connecting piece, wherein the fixing piece is pre-fixed on the outer wall surface of the pressure container at intervals and connected to the tension rod.

8. The water pressure testing device for a pressure vessel according to claim 1, characterized in that: There is a gap between the connecting piece and the manhole and the liquid inlet and outlet of the pressure container in the axial direction of the pressure container.

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