A pressure cylinder outer pressure detection device and a method of using the same

Abstract

A kind of pressure cylinder outer pressure detection device and its using method, detection device includes outer tank, pressure tank, locking cover, connecting flange, blanking plate and gauge;Outer tank and pressure tank are hollow cylinder, pressure tank is arranged in the inside of outer tank, the bottom of outer tank is provided with at least one inlet and outlet;The middle part of locking cover is provided with observation port;One end of pressure tank and outer tank is connected with locking cover, the other end of pressure tank is connected with blanking plate;The other end of outer tank is connected with connecting flange;Outer tank, pressure tank, locking cover and connecting flange form spaced cavity;Gauge includes gauge rod and gauge piston, gauge piston and the cavity wall of the inner cavity of pressure tank reciprocating sliding fit, one end of gauge rod is connected with gauge piston, the other end penetrates observation port and extends outward.The design is not only accurate test result, and test process is safer.

Description

TECHNICAL FIELD

[0001] The present application relates to a detection device and a method thereof, and belongs to the field of underwater equipment, in particular to a pressure cylinder outer pressure detection device and a method thereof. BACKGROUND

[0002] Due to the complex shape and large profile size of the tubular underwater device parts, they are usually produced by forging or ship steel plate rolling, and the structural strength and sealing performance of the parts are directly related to the reliability and safety of the diving operation. Therefore, it is necessary to simulate the underwater working environment to test the outer pressure strength and sealing performance of the cylinder parts.

[0003] An invention application with application number 202110708662.4 and application date June 25, 2021 discloses a pipe pressure testing device and a testing method thereof, which includes a device base frame, a cylinder, a pipe to be tested, and a pipe deformation online metering device. The cylinder is arranged above the device base frame, and a roller is arranged on the inner bottom surface of the cylinder near the sealing end. A flange inner support sleeve is fixedly arranged at the opening end of the cylinder. One end of the pipe to be tested is arranged on the roller, and the other end is arranged on the flange inner support sleeve. A plug is arranged at one end of the pipe to be tested, and a locking sleeve is arranged at the other end. The locking sleeve and the pipe deformation online metering device are connected through a first conduit for pipe external pressure testing and metering. Although the device can test the deformation of the tubular part, it is mainly used to obtain the deformation amount of the pipe, and cannot completely and intuitively simulate the underwater external pressure working environment, which has a certain gap with the actual working condition, and the test result has deviation.

[0004] Currently, the detection method for the outer pressure strength test of the cylinder parts is to use the internal pressure test method to approximately replace the external pressure test method. First, the two ends of the cylinder part to be tested are sealed, then the cylinder is filled with water and the air is discharged, and then the pressure of 1.25 to 1.5 times the external pressure is input to the test value through the water injection hole by using the hydraulic pump and maintained for a certain time. Whether the cylinder deforms and leaks under the internal pressure is observed, and whether the strength and sealing performance of the part meet the use requirements are judged. Although this method can test the strength of the pipe, in the case of high pressure, the part may burst, which has certain safety hazards.

[0005] The information disclosed in this background section is intended only to increase an understanding of the general background of the application and is not admitted to be prior art against anyone except the application. SUMMARY

[0006] The present application aims to overcome the defects and problems of inaccurate test results and safety hazards in the testing process in the prior art, and provide a pressure cylinder outer pressure detection device and a use method thereof, which are accurate in test results and safer in testing process.

[0007] To achieve the above object, the technical solution of the present application is: a pressure cylinder outer pressure detection device, the detection device comprising an outer tank body, a pressure tank body, a locking cover plate, a connecting flange, a blanking plate and a gauge; the outer tank body and the pressure tank body are both hollow cylindrical, the pressure tank body is arranged inside the outer tank body, and the bottom of the outer tank body is provided with at least one inlet and outlet port; the middle part of the locking cover plate is provided with a viewing port; one end of the pressure tank body and the outer tank body is connected with the locking cover plate, and the other end of the pressure tank body is connected with the blanking plate; the other end of the outer tank body is connected with the connecting flange; the outer tank body, the pressure tank body, the locking cover plate and the connecting flange form a spacing cavity;

[0008] The gauge comprises a gauge rod and a gauge piston, the gauge piston is reciprocally slidably connected with the cavity wall of the inner cavity of the pressure tank body, one end of the gauge rod is connected with the gauge piston, and the other end of the gauge rod penetrates the viewing port and extends outward.

[0009] One end of the outer tank body is provided with a first connecting part, and the other end is provided with a second connecting part; one end of the pressure tank body is provided with a third connecting part, and the other end is provided with a fourth connecting part,

[0010] The first connecting part is provided with a plurality of first through holes along the axis thereof in the circumferential direction, and the second connecting part is provided with a plurality of second through holes along the axis thereof in the circumferential direction; the third connecting part is provided with a plurality of third through holes along the axis thereof in the circumferential direction, and the fourth connecting part is provided with a plurality of fourth through holes along the axis thereof in the circumferential direction;

[0011] The locking cover plate is provided with a plurality of outer through holes and a plurality of inner through holes along the axis thereof in the circumferential direction, the outer through holes are arranged corresponding to the first through holes, and the inner through holes are arranged corresponding to the third through holes;

[0012] The connecting flange is provided with a plurality of flange through holes along the axis thereof in the circumferential direction, and the flange through holes are arranged corresponding to the second through holes;

[0013] The blanking plate is provided with a plurality of blanking plate through holes along the axis thereof in the circumferential direction, and the blanking plate through holes are arranged corresponding to the fourth through holes.

[0014] A first sealing ring is arranged between the locking cover plate and the outer tank body, and the outer through holes and the first through holes are fixedly connected by a first bolt; a second sealing ring is arranged between the connecting flange and the outer tank body, and the flange through holes and the second through holes are fixedly connected by a plurality of second bolts;

[0015] The third sealing ring is arranged between the locking cover plate and the pressure-bearing tank body, the third perforation and the inner perforation are fixedly connected through a plurality of third bolts, the fourth sealing ring is arranged between the baffle and the pressure-bearing tank body, and the fourth perforation and the baffle perforation are fixedly connected through a plurality of fourth bolts.

[0016] The outer wall of the pressure-bearing tank body between the third connecting portion and the fourth connecting portion is sleeved with a plurality of sliding assemblies, and the pressure-bearing tank body and the outer tank body are slidingly matched.

[0017] The sliding assembly comprises a left half ring and a right half ring, the left half ring and the right half ring are oppositely arranged and fixedly connected through a fifth bolt, and the lower parts of the left half ring and the right half ring are provided with bosses, and the bosses are fixedly connected with pulley pieces.

[0018] The pulley piece comprises a pulley horizontal plate and a pulley vertical plate, the pulley vertical plate and the pulley horizontal plate are vertically connected in the middle part, a pulley groove is formed in the vertical middle part of the pulley vertical plate, a pulley is arranged in the pulley groove, a pulley hole is formed in the shaft center of the pulley vertical plate, a pulley shaft is arranged in the pulley hole, and the pulley is sleeved on the pulley shaft.

[0019] Corresponding threaded holes are formed in the two ends of the boss and the pulley horizontal plate, and sixth bolts are arranged in the threaded holes.

[0020] A plurality of reinforcing rings are arranged on the outer wall of the outer tank body and the pressure-bearing tank body.

[0021] A plurality of reinforcing ribs and ears are arranged on one side of the locking cover plate.

[0022] A use method of a pressure-bearing cylinder outer pressure detection device, the use method comprising the following steps:

[0023] Step one: continuously input liquid into the interval cavity through the inlet and outlet, stop inputting when the liquid input reaches a preset pressure value, and then maintain pressure until the pressure stabilizes;

[0024] Step two: observe the deformation and leakage of the pressure-bearing tank body from the observation port, and perform any one of the following operations:

[0025] The first operation: if leakage occurs, the leakage is investigated, if the investigation result is that the leakage occurs at the sealing part of the outer tank body, the pressure-bearing tank body, the locking cover plate and the connecting flange, the liquid is discharged, the sealing condition is checked, and the method returns to step one; if the investigation result is that the leakage occurs at the tank body of the pressure-bearing tank body, the pressure-bearing tank body does not meet the use requirement, and the detection is completed.

[0026] The second operation: if no leakage occurs, the push-pull gauge rod drives the gauge piston to reciprocate from one end to the other end of the pressure tank body, and several passing tests are performed; if the gauge piston slides smoothly and without jamming, the pressure tank body meets the use requirements, and the detection is completed; if the gauge piston slides with jamming and is not smooth, the pressure tank body does not meet the use requirements, and the detection is completed.

[0027] Compared with the prior art, the beneficial effects of the present application are:

[0028] 1、The detection device and its use method of the pressure cylinder outer pressure detection device, the detection device comprises an outer tank body, a pressure tank body, a locking cover plate, a connecting flange, a blanking plate and a gauge; the outer tank body and the pressure tank body are both hollow cylindrical, the pressure tank body is arranged in the inner part of the outer tank body, and at least one inlet and outlet is arranged at the bottom of the outer tank body; the middle part of the locking cover plate is provided with an observation port; one end of the pressure tank body and the outer tank body is connected with the locking cover plate, and the other end of the pressure tank body is connected with the blanking plate; the other end of the outer tank body is connected with the connecting flange; the outer tank body, the pressure tank body, the locking cover plate and the connecting flange form a spacing cavity; the gauge comprises a gauge rod and a gauge piston, the gauge piston is reciprocally slidably connected with the cavity wall of the inner cavity of the pressure tank body, one end of the gauge rod is connected with the gauge piston, and the other end of the gauge rod extends outward through the observation port; the use method comprises the following steps: firstly, liquid is continuously input into the spacing cavity through the inlet and outlet, the liquid input is stopped when the preset pressure value is reached, and the pressure is maintained until the pressure is stable; then, the deformation and leakage of the pressure tank body are observed from the observation port, if leakage occurs, the leakage is investigated; if no leakage occurs, the gauge is pushed and pulled for several times for passing test; in the application, the outer pressure test is carried out by injecting high-pressure liquid to simulate the underwater environment, different pressure can be simulated according to different depths, the deformation and leakage of the tank body can be known by observing the state of the tank body, and then the passing test is carried out by the gauge to verify whether the deformation of the tank body is within the tolerance value, the test result is relatively accurate, and in the high-pressure condition, even if the pressure tank body is broken, the outer tank body can block it, so that the safety hidden danger in the test process is avoided, and the test process is relatively safe. Therefore, the present application not only has accurate test results, but also has a relatively safe test process.

[0029] 2、The pressure cylinder outer pressure detection device and its use method, a plurality of sliding assemblies are arranged on the outer wall of the pressure tank body between the third connecting part and the fourth connecting part, the pressure tank body and the outer tank body are slidably connected; in the application, the tubular part is usually long, the sliding assembly can be conveniently arranged to push the pressure tank body into the outer tank body, and the concentricity between the pressure tank body and the outer tank body can be adjusted by adjusting the sliding assembly, so that the detection error is reduced. Therefore, the present application is not only convenient to operate, but also has accurate detection results.

[0030] 3、The pressure cylinder outer pressure detection device and the using method thereof, through injecting high pressure into the interval cavity, the pressure condition of the pressure tank under water is simulated, then the deformation of the tank is observed, in the high pressure condition, if the visible deformation and leakage are observed, in the actual working condition, the naked eye observation is the most intuitive, which is consistent with the actual situation, if the visible deformation and leakage are not observed, the pass test is carried out, since the tolerance exists between the gauge piston and the pressure tank, as long as the deformation in the expected tolerance range is acceptable, the test result is more accurate, in the test process, since the test operation is carried out outside the tank, and the outer tank is blocked, the safety hidden trouble in the test process is smaller. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 It is the detection device structure schematic view in the application.

[0032] Figure 2 It is the explosion structure schematic view of the detection device in the application.

[0033] Figure 3 It is the sectional view of the detection device in the application.

[0034] Figure 4 It is the structure schematic view of the sliding assembly in the application.

[0035] Figure 5 It is the structure schematic view of the sliding piece in the application.

[0036] In the drawing: outer tank 1, interval cavity 11, first connecting part 12, second connecting part 13, first perforation 14, second perforation 15, inlet and outlet port 16, pressure tank 2, third connecting part 22, fourth connecting part 23, third perforation 24, fourth perforation 25, locking cover plate 3, outer perforation 31, inner perforation 32, first sealing ring 33, first bolt 34, third sealing ring 35, third bolt 36, observation port 37, reinforcing rib 38, lug 39, connecting flange 4, flange perforation 41, second sealing ring 42, second bolt 43, baffle plate 5, baffle plate perforation 51, fourth sealing ring 52, fourth bolt 53, gauge 6, gauge rod 61, gauge piston 62, sliding assembly 7, left half ring 71, right half ring 72, fifth bolt 73, boss 74, pulley piece 75, pulley horizontal plate 751, pulley vertical plate 752, pulley groove 753, pulley perforation 754, pulley shaft 755, pulley 756, threaded hole 76, sixth bolt 77, reinforcing ring 8, base 9. DETAILED DESCRIPTION

[0037] The application is further explained in detail in combination with the description of the drawing and the specific embodiment.

[0038] See Figure 1 Figure 5 A kind of pressure cylinder outer pressure detection device, the detection device includes outer tank 1, pressure tank 2, locking cover plate 3, connecting flange 4, stifled plate 5 and gauge 6;The outer tank 1 and pressure tank 2 are hollow cylinder, the pressure tank 2 is arranged in the inside of outer tank 1, the bottom of outer tank 1 is provided with at least one inlet and outlet 16;The middle part of locking cover plate 3 is provided with observation port 37;The one end of pressure tank 2 and outer tank 1 is connected with locking cover plate 3, the other end of pressure tank 2 is connected with stifled plate 5;The other end of outer tank 1 is connected with connecting flange 4;Outer tank 1, pressure tank 2, locking cover plate 3 and connecting flange 4 are enclosed and form with interval cavity 11;

[0039] Gauge 6 includes gauge rod 61 and gauge piston 62, the cavity wall of the inner cavity 21 of pressure tank 2 and gauge piston 62 reciprocating sliding fit, one end of gauge rod 61 is connected with gauge piston 62, and the other end penetrates observation port 37 and extends outward.

[0040] One end of outer tank 1 is provided with first connecting portion 12, the other end is provided with second connecting portion 13;One end of pressure tank 2 is provided with third connecting portion 22, the other end is provided with fourth connecting portion 23,

[0041] First connecting portion 12 is provided with a plurality of first perforations 14 along its axis, and second connecting portion 13 is provided with a plurality of second perforations 15 along its axis;Third connecting portion 22 is provided with a plurality of third perforations 24 along its axis, and fourth connecting portion 23 is provided with a plurality of fourth perforations 25 along its axis;

[0042] Locking cover plate 3 is provided with a plurality of outer perforations 31 and a plurality of inner perforations 32 along its axis, the outer perforations 31 are correspondingly provided with the first perforations 14, and the inner perforations 32 are correspondingly provided with the third perforations 24;

[0043] Connecting flange 4 is provided with a plurality of flange perforations 41 along its axis, and the flange perforations 41 are correspondingly provided with the second perforations 15;

[0044] Stifled plate 5 is provided with a plurality of stifled plate perforations 51 along its axis, and the stifled plate perforations 51 are correspondingly provided with the fourth perforations 25.

[0045] First sealing ring 33 is clamped between locking cover plate 3 and outer tank 1, and first bolt 34 is fixedly connected between outer perforation 31 and first perforation 14;Second sealing ring 42 is clamped between connecting flange 4 and outer tank 1, and a plurality of second bolts 43 are fixedly connected between flange perforation 41 and second perforation 15; ​

[0046] The locking cover plate 3 and the pressure-bearing tank body 2 are clamped with a third sealing ring 35, and the inner perforation 32 and the third perforation 24 are fixedly connected through a plurality of third bolts 36; the baffle plate 5 and the pressure-bearing tank body 2 are clamped with a fourth sealing ring 52, and the baffle plate perforation 51 and the fourth perforation 25 are fixedly connected through a plurality of fourth bolts 53.

[0047] The outer wall of the pressure-bearing tank body 2 between the third connecting part 22 and the fourth connecting part 23 is sleeved with a plurality of sliding assemblies 7, which are in sliding fit with the outer tank body 1 and the pressure-bearing tank body 2.

[0048] The sliding assembly 7 includes a left half ring 71 and a right half ring 72, which are oppositely arranged and fixedly connected through a fifth bolt 73; the lower part of the left half ring 71 and the right half ring 72 is provided with a boss 74, and the boss 74 is fixedly connected with a pulley piece 75.

[0049] The pulley piece 75 includes a pulley horizontal plate 751 and a pulley vertical plate 752, the pulley vertical plate 752 is vertically connected with the middle part of the pulley horizontal plate 751, the vertical middle part of the pulley vertical plate 752 is provided with a pulley groove 753, the pulley groove 753 is provided with a pulley 756, the pulley vertical plate 752 is provided with a pulley perforation 754 at the shaft center, the pulley perforation 754 is provided with a pulley shaft 755, and the pulley 756 is sleeved on the pulley shaft 755.

[0050] The boss 74 and the both ends of the pulley horizontal plate 751 are provided with a threaded hole 76 corresponding to each other, and the threaded hole 76 is provided with a sixth bolt 77.

[0051] The outer tank body 1 and the outer wall of the pressure-bearing tank body 2 are provided with a plurality of reinforcing rings 8.

[0052] One side of the locking cover plate 3 is provided with a plurality of reinforcing ribs 38 and a hanging ear 39.

[0053] A use method of a pressure-bearing cylinder outer pressure detection device, the use method comprising the following steps:

[0054] Step one: continuously input liquid into the interval cavity 11 through the inlet and outlet 16, stop inputting when the liquid input reaches the preset pressure value, and then maintain pressure until the pressure stabilizes;

[0055] Step two: observe the deformation and leakage of the pressure-bearing tank body 2 from the observation port 37, and perform any one of the following operations:

[0056] The first operation: if leakage occurs, the leakage is investigated, if the investigation result is that the sealing part of the outer tank body 1, the pressure-bearing tank body 2, the locking cover plate 3 and the connecting flange 4 leaks, the liquid is discharged, the sealing condition is checked, and the step one is returned to; if the investigation result is that the tank body of the pressure-bearing tank body 2 leaks, the pressure-bearing tank body 2 does not meet the use requirement, and the detection is completed;

[0057] The second operation: if no leakage occurs, the gauge rod 61 drives the gauge piston 62 to reciprocate and slide from one end to the other end of the pressure-bearing tank body 2, and a plurality of passing tests are performed; if the gauge piston 62 slides smoothly and is not jammed, the pressure-bearing tank body 2 meets the use requirement, and the detection is completed; if the gauge piston 62 is jammed and not smooth, the pressure-bearing tank body 2 does not meet the use requirement, and the detection is completed.

[0058] The principle of the present application is as follows:

[0059] In the present application, the outer tank body 1 and one end of the pressure-bearing tank body 2 are jointly connected with the locking cover plate 3, the other end of the pressure-bearing tank body 2 is provided with the baffle plate 5, the pressure-bearing tank body 2 is placed in the outer tank body 1, and there is a certain distance between the baffle plate 2 and the connecting flange 4 at the other end of the outer tank body 1, so that different length specifications of the tank body can be adapted, and the applicability of the detection device is improved.

[0060] Embodiment 1:

[0061] Referring to Figure 1 — Figure 5 A pressure-bearing cylinder body external pressure detection device, the detection device comprises an outer tank body 1, a pressure-bearing tank body 2, a locking cover plate 3, a connecting flange 4, a baffle plate 5 and a gauge 6; the outer tank body 1 and the pressure-bearing tank body 2 are both hollow cylinders, the pressure-bearing tank body 2 is arranged in the inside of the outer tank body 1, and at least one inlet and outlet 16 is arranged at the bottom of the outer tank body 1; the middle part of the locking cover plate 3 is provided with an observation port 37; one end of the pressure-bearing tank body 2 and the outer tank body 1 is jointly connected with the locking cover plate 3, and the other end of the pressure-bearing tank body 2 is connected with the baffle plate 5; the other end of the outer tank body 1 is connected with the connecting flange 4; the outer tank body 1, the pressure-bearing tank body 2, the locking cover plate 3 and the connecting flange 4 jointly form a spacing cavity 11; the gauge 6 comprises a gauge rod 61 and a gauge piston 62, the gauge piston 62 is in reciprocating sliding fit with the cavity wall of the inner cavity 21 of the pressure-bearing tank body 2, one end of the gauge rod 61 is connected with the gauge piston 62, and the other end penetrates through the observation port 37 and extends outward (preferably, the shaft centers of the outer tank body 1, the pressure-bearing tank body 2, the gauge rod 61 and the gauge piston 62 are on the same horizontal line and are parallel to the horizontal plane).

[0062] A use method of a pressure-bearing cylinder body external pressure detection device, the use method comprises the following steps:

[0063] Step one: continuously input liquid into the interval cavity 11 through the inlet and outlet 16, stop inputting when the liquid input reaches the preset pressure value, then keep the pressure until the pressure is stable;

[0064] Step two: observe the deformation and leakage of the pressure tank body 2 from the observation port 37, and perform any of the following operations:

[0065] The first operation: if leakage occurs, the leakage is investigated, if the investigation result is that the sealing part of the outer tank body 1, the pressure tank body 2, the locking cover plate 3 and the connecting flange 4 leaks, the liquid is discharged, the sealing condition is checked, and returns to step one; if the investigation result is that the tank body 2 leaks, the pressure tank body 2 does not meet the use requirement, and the detection is completed.

[0066] The second operation: if no leakage occurs, the gauge rod 61 drives the gauge piston 62 to reciprocate from one end to the other end of the pressure tank body 2, and the through test is performed several times; if the gauge piston 62 slides smoothly and does not jam, the pressure tank body 2 meets the use requirement, and the detection is completed; if the gauge piston 62 slides and jams, the pressure tank body 2 does not meet the use requirement, and the detection is completed.

[0067] In application, first, the connecting flange 4 is connected with the outer tank body 1, the blind plate 5 is connected with the pressure tank body 2, then the gauge piston 62 is placed into the pressure tank body 2, and the pressure tank body 2 is placed into the outer tank body 1, the locking cover plate 3 is used to connect the pressure tank body 2 with the outer tank body 1, the installation work of the detection device is completed; during detection, first, the liquid is continuously input into the interval cavity 11 through the inlet and outlet 16, the liquid input is stopped when the liquid input reaches the preset pressure value, then the pressure is kept until the pressure is stable, then the deformation and leakage of the pressure tank body 2 are observed from the observation port 37, if leakage occurs, the leakage is investigated, if no leakage occurs, the gauge rod 61 is inserted into the observation port 37 and connected with the gauge piston 62, and the through test is performed.

[0068] Example 2:

[0069] The basic content is the same as example 1, the difference is that:

[0070] The outer tank body 1 is provided with a first connecting part 12 at one end and a second connecting part 13 at the other end; the pressure tank body 2 is provided with a third connecting part 22 at one end and a fourth connecting part 23 at the other end; the first connecting part 12 is provided with a plurality of first through holes 14 along the axis thereof; the second connecting part 13 is provided with a plurality of second through holes 15 along the axis thereof; the third connecting part 22 is provided with a plurality of third through holes 24 along the axis thereof; the fourth connecting part 23 is provided with a plurality of fourth through holes 25 along the axis thereof; the locking cover plate 3 is provided with a plurality of outer through holes 31 and a plurality of inner through holes 32 along the axis thereof; the outer through holes 31 are provided corresponding to the first through holes 14; the inner through holes 32 are provided corresponding to the third through holes 24; the connecting flange 4 is provided with a plurality of flange through holes 41 along the axis thereof; the flange through holes 41 are provided corresponding to the second through holes 15; the muff plate 5 is provided with a plurality of muff plate through holes 51 along the axis thereof; the muff plate through holes 51 are provided corresponding to the fourth through holes 25; the first sealing ring 33 is arranged between the locking cover plate 3 and the outer tank body 1; the first through holes 14 and the outer through holes 31 are fixedly connected by the first bolts 34; the second sealing ring 42 is arranged between the connecting flange 4 and the outer tank body 1; the second through holes 15 and the flange through holes 41 are fixedly connected by the second bolts 43; the third sealing ring 35 is arranged between the locking cover plate 3 and the pressure tank body 2; the third through holes 24 and the inner through holes 32 are fixedly connected by the third bolts 36; the fourth sealing ring 52 is arranged between the muff plate 5 and the pressure tank body 2; the fourth through holes 25 and the muff plate through holes 51 are fixedly connected by the fourth bolts 53.

[0071] In application, the components are fastened by bolts and the sealing rings are arranged therebetween, so that the sealing between the components can be further enhanced; in testing process, the sealing between the components can be detected; if the sealing cannot meet the requirements, the sealing can be adjusted.

[0072] Example 3:

[0073] The basic content is the same as that of example 2, except that:

[0074] A plurality of sliding assemblies 7 (preferably, at least two, respectively arranged at both ends of the pressure tank body 2) are sleeved on the outer wall of the pressure tank body 2 between the third connecting portion 22 and the fourth connecting portion 23 to slide the pressure tank body 2 with the outer tank body 1; the sliding assembly 7 includes a left half ring 71 and a right half ring 72, the left half ring 71 and the right half ring 72 are arranged opposite to each other and fixedly connected by a fifth bolt 73; the upper or lower part of the left half ring 71 and the right half ring 72 are both provided with a boss 74 (preferably, at least two). The bosses 74 are all fixedly connected to pulley members 75; the pulley members 75 include a pulley transverse plate 751 and a pulley vertical plate 752, the pulley vertical plate 752 is vertically connected to the middle of the pulley transverse plate 751, a pulley groove 753 is opened in the vertical middle of the pulley vertical plate 752, a pulley 756 is arranged in the pulley groove 753, a pulley through hole 754 is opened at the axis center of the pulley vertical plate 752, a pulley shaft 755 is passed through the pulley through hole 754, and the pulley 756 is sleeved on the pulley shaft 755.

[0075] In application, the setting of the sliding assembly 7 facilitates pushing the pressure tank body 2 into the outer tank body 1, and by adjusting the height of the sliding assembly 7, the pressure tank body 2 can be ensured to be located in the center of the outer tank body 1, so that the pressure around the pressure tank body 2 is uniform.

[0076] Example 4:

[0077] The basic content is the same as Example 3, except that:

[0078] Threaded holes 76 are provided at both ends of the boss 74 and the pulley cross plate 751 , and sixth bolts 77 are provided in the threaded holes 76 .

[0079] In use, by screwing in and out the sixth bolt 77 to make it contact with the inner wall of the outer tank body 1, the concentricity of the pressure tank body 2 and the outer tank body 1 can be adjusted, and the pressure tank body 2 can be supported.

[0080] Example 5:

[0081] The basic content is the same as Example 4, except that:

[0082] A plurality of reinforcement rings 8 are provided on the outer walls of the outer tank body 1 and the pressure tank body 2 ; a plurality of reinforcement ribs 38 and hanging ears 39 are provided on one side of the locking cover plate 3 .

[0083] In application, the reinforcing ring 8 and the reinforcing rib 38 are used to strengthen the overall structural strength of the tank body, and the lug 39 is used to facilitate hoisting; the first connecting part (12) and the second connecting part (13) are reinforcing rings, and the third connecting part 22 and the fourth connecting part 23 are larger than other reinforcing rings 8 on the pressure tank body 2, so as to facilitate drilling and connection with the detection device, and after detection is completed, the third connecting part 22 and the fourth connecting part 23 are machined to be consistent with other reinforcing rings 8, so as to reasonably utilize the self structure of the pressure tank body 2.

[0084] Embodiment 6:

[0085] The basic content is the same as that in Embodiment 5, except that:

[0086] The outer tank body 1 is provided with a base 9 at both ends, and the base 9 is fixed to the ground.

[0087] In application, the outer tank body 1 is placed on the base 9, and is parallel to the ground, so as to ensure stability during detection.

[0088] The above only describes the preferred embodiments of the present application, and the protection scope of the present application is not limited to the above embodiments, but any equivalent modification or change made by those skilled in the art according to the disclosed content of the present application shall be included in the protection scope recorded in the claims.

Claims

1. A device for detecting external pressure of a pressure-bearing cylinder, characterized in that: The detection device comprises an outer tank body (1), a pressure tank body (2), a locking cover plate (3), a connecting flange (4), a blanking plate (5) and a gauge (6); the outer tank body (1) and the pressure tank body (2) are both hollow cylindrical, the pressure tank body (2) is arranged inside the outer tank body (1), and the bottom of the outer tank body (1) is provided with at least one liquid inlet and outlet (16); an observation port (37) is provided in the middle of the locking cover plate (3); one end of the pressure tank body (2) and the outer tank body (1) are connected to the locking cover plate (3), and the other end of the pressure tank body (2) is connected to the blanking plate (5); the other end of the outer tank body (1) is connected to the connecting flange (4); the outer tank body (1), the pressure tank body (2), the locking cover plate (3) and the connecting flange (4) together form a partition cavity (11); The gauge (6) includes a gauge rod (61) and a gauge piston (62), wherein the gauge piston (62) is in reciprocating sliding engagement with the cavity wall of the inner cavity (21) of the pressure-bearing tank body (2), and one end of the gauge rod (61) is connected to the gauge piston (62), and the other end passes through the observation port (37) and extends outward.

2. The device for detecting external pressure of a pressure-bearing cylinder according to claim 1, characterized in that: One end of the outer tank body (1) is provided with a first connecting portion (12), and the other end is provided with a second connecting portion (13); one end of the pressure tank body (2) is provided with a third connecting portion (22), and the other end is provided with a fourth connecting portion (23). The first connecting portion (12) is provided with a plurality of first through-holes (14) along the circumferential direction of its axis, and the second connecting portion (13) is provided with a plurality of second through-holes (15) along the circumferential direction of its axis; the third connecting portion (22) is provided with a plurality of third through-holes (24) along the circumferential direction of its axis, and the fourth connecting portion (23) is provided with a plurality of fourth through-holes (25) along the circumferential direction of its axis; The locking cover plate (3) is provided with a plurality of outer through-holes (31) and a plurality of inner through-holes (32) along the circumference of the axis thereof, wherein the outer through-holes (31) are provided corresponding to the first through-holes (14), and the inner through-holes (32) are provided corresponding to the third through-holes (24); The connecting flange (4) is provided with a plurality of flange through-holes (41) along the circumference of the axis thereof, and the flange through-holes (41) are provided corresponding to the second through-holes (15); The blocking plate (5) is provided with a plurality of blocking plate through-holes (51) along the circumferential direction of the axis thereof, and the blocking plate through-holes (51) are provided corresponding to the fourth through-holes (25).

3. The device for detecting external pressure of a pressure-bearing cylinder according to claim 2, characterized in that: A first sealing ring (33) is sandwiched between the locking cover plate (3) and the outer tank body (1), and the outer through-hole (31) and the first through-hole (14) are fixedly connected by a first bolt (34); a second sealing ring (42) is sandwiched between the connecting flange (4) and the outer tank body (1), and the flange through-hole (41) and the second through-hole (15) are fixedly connected by a plurality of second bolts (43); A third sealing ring (35) is sandwiched between the locking cover plate (3) and the pressure tank body (2), and the inner through hole (32) and the third through hole (24) are fixedly connected by a plurality of third bolts (36); a fourth sealing ring (52) is sandwiched between the blocking plate (5) and the pressure tank body (2), and the blocking plate through hole (51) and the fourth through hole (25) are fixedly connected by a plurality of fourth bolts (53).

4. The device for detecting external pressure of a pressure-bearing cylinder according to claim 3, characterized in that: A plurality of sliding assemblies (7) are sleeved on the outer wall of the pressure-bearing tank body (2) between the third connecting portion (22) and the fourth connecting portion (23), so as to enable the pressure-bearing tank body (2) to be slidably matched with the outer tank body (1).

5. The device for detecting external pressure of a pressure-bearing cylinder according to claim 4, characterized in that: The sliding assembly (7) comprises a left half ring (71) and a right half ring (72), wherein the left half ring (71) and the right half ring (72) are arranged opposite to each other and fixedly connected by a fifth bolt (73); a boss (74) is provided at the lower portion of each of the left half ring (71) and the right half ring (72), and a pulley member (75) is fixedly connected to each of the bosses (74).

6. The device for detecting external pressure of a pressure-bearing cylinder according to claim 5, characterized in that: The pulley member (75) includes a pulley transverse plate (751) and a pulley vertical plate (752), wherein the pulley vertical plate (752) is vertically connected to the middle of the pulley transverse plate (751), a pulley groove (753) is provided in the vertical middle of the pulley vertical plate (752), a pulley (756) is provided in the pulley groove (753), a pulley through hole (754) is provided at the axis center of the pulley vertical plate (752), a pulley shaft (755) is passed through the pulley through hole (754), and the pulley (756) is sleeved on the pulley shaft (755).

7. The device for detecting external pressure of a pressure-bearing cylinder according to claim 6, characterized in that: The boss (74) and the two ends of the pulley transverse plate (751) are both provided with threaded holes (76) corresponding to each other, and the threaded holes (76) are both provided with sixth bolts (77).

8. The device for detecting external pressure of a pressure-bearing cylinder according to any one of claims 1 to 7, characterized in that: A plurality of reinforcement rings (8) are provided on the outer walls of the outer tank body (1) and the pressure tank body (2).

9. The device for detecting external pressure of a pressure-bearing cylinder according to any one of claims 1 to 7, characterized in that: A plurality of reinforcing ribs (38) and hanging ears (39) are provided on one side of the locking cover plate (3).

10. A method for using the pressure-bearing cylinder external pressure detection device according to claim 1, characterized in that: The method of use comprises the following steps: Step 1: continuously inputting liquid into the spacer cavity (11) through the liquid inlet and outlet (16), stopping the input of liquid after it reaches a preset pressure value, and then maintaining the pressure until the pressure stabilizes; Step 2: Observe the deformation and leakage of the pressure tank (2) from the observation port (37) and perform any of the following operations: The first operation: if leakage occurs, the leakage point is checked. If the result of the check is that leakage occurs at the sealing point between the outer tank body (1), the pressure tank body (2), the locking cover (3) and the connecting flange (4), the liquid is discharged, the sealing condition is checked, and the process returns to step 1. If the result of the check is that leakage occurs at the tank body of the pressure tank body (2), the pressure tank body (2) does not meet the use requirements and the test is completed. The second operation: if no leakage occurs, the gauge rod (61) is pushed and pulled to drive the gauge piston (62) to slide back and forth from one end to the other end of the pressure tank body (2), and several pass tests are performed; if the gauge piston (62) slides smoothly and without stagnation, the pressure tank body (2) meets the use requirements and the test is completed; if the gauge piston (62) slides stuck and is not smooth, the pressure tank body (2) does not meet the use requirements and the test is completed.

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