Water-resistant sealing pressure testing device

Abstract

The utility model relates to the technical field of pressure test, and discloses a water-resistant sealing pressure test device, which comprises a pressure tank body, a tank cover, a fastener, a pressure gauge and a hydraulic press, the pressure tank body is provided with a tank opening, the tank cover is detachably arranged at the tank opening, and the fastener is connected between the tank cover and the pressure tank body; the pressure tank body or the tank cover is provided with a pressure measuring interface, and the pressure gauge is installed at the pressure measuring interface to detect the internal water pressure of the pressure tank body; a pressurizing opening is further formed in the pressure tank body or the tank cover, and a pressure pipeline is connected between the hydraulic press and the pressurizing opening; a threading sleeve is further arranged on the tank cover, a cable channel, an annular groove and a threaded section are arranged in the threading sleeve, the annular groove and the threaded section are located in the cable channel, a sealing rubber ring is arranged in the annular groove, a threaded pressing piece is installed on the threaded section, and the threaded pressing piece and the sealing rubber ring are in extrusion fit in the axis direction of the cable channel. Requirements of cable leading-out and voltage resistance testing are met, and the waterproof sealing performance of outboard electrical equipment and cable connection can be tested.

Description

Technical Field

[0001] The utility model relates to the technical field of pressure testing, in particular to a water-tight pressure testing device for water resistance. Background Art

[0002] During the maintenance of a certain type of naval ship, after the disassembly and repair of the outboard electrical equipment, it is necessary to withstand a 3.8 Mpa water-tight pressure test before it is allowed to be installed on the ship. The test pressure of the existing pressure testing device is less than 1 Mpa, and it is impossible to test the outboard electrical equipment and the cable connection together.

[0003] For example, the Chinese invention patent application with the application publication number CN103983469A and the application publication date of August 13, 2014 discloses a pressure testing simulation device and method for underwater equipment, specifically including a horizontal pressure tank. One end of the horizontal pressure tank is provided with a detachable head. A pressure gauge, an exhaust valve and a safety valve are provided on the top of the horizontal pressure tank. An accumulator, a water supply and drainage valve and a check valve are provided at the bottom of the horizontal pressure tank. The outlet of the check valve is communicated with the inner cavity of the horizontal pressure tank. A lighting device and a camera device are installed on the inner wall of the horizontal pressure tank. The underwater equipment to be tested is placed in the horizontal pressure tank, and the detachable head is sealed; water is injected into the pressure tank through the water supply and drainage valve, and a pressure pump is connected through the check valve to pressurize the water in the pressure tank until the required pressure value for testing is reached, and the pressure is stopped. Observe and detect the pressure deformation degree and sealing condition of the underwater equipment to be tested.

[0004] However, the existing device can only perform pressure tests on underwater devices, and cannot test the water-tightness of the connection between outboard electrical equipment and cables, and cannot avoid the problem that the outboard electrical equipment may leak and be damaged in the underwater pressure environment. Utility Model Content

[0005] The technical problem to be solved by the utility model is that the existing device can only perform pressure tests on underwater devices, and cannot test the water-tightness of the connection between outboard electrical equipment and cables, and cannot avoid the problem that the outboard electrical equipment may leak and be damaged in the underwater pressure environment.

[0006] In order to solve the above technical problems, the utility model provides a technical solution for a water-tight pressure testing device:

[0007] The water-tight pressure testing device includes a pressure tank body, a tank cover, a fastener, a pressure gauge and a hydraulic press. The pressure tank body is provided with a tank opening. The tank cover is detachably installed at the tank opening, and the fastener is connected between the tank cover and the pressure tank body;

[0008] A pressure measuring interface is provided on the pressure tank body or the tank cover, and the pressure gauge is installed at the pressure measuring interface for detecting the internal water pressure of the pressure tank body; a pressurizing port is also provided on the pressure tank body or the tank cover, and a pressure pipeline is connected between the hydraulic press and the pressurizing port;

[0009] A wire threading sleeve is further provided on the tank cover. An electric cable channel is provided inside the wire threading sleeve, as well as an annular groove and a threaded section located in the electric cable channel. A sealing rubber ring is provided in the annular groove, and a threaded pressing member is installed on the threaded section, and the threaded pressing member and the sealing rubber ring are in extrusion fit in the axial direction of the electric cable channel.

[0010] Furthermore, the annular groove is located in the middle of the axial direction of the electric cable channel, the inner diameter of the annular groove is larger than the inner diameter of the electric cable channel, and the bottom surface of the annular groove is in blocking fit with the lower edge of the sealing rubber ring.

[0011] Furthermore, the threaded section is located at the axial end of the electric cable channel, and the inner diameter of the threaded section is larger than the inner diameter of the annular groove. The lower edge of the threaded pressing member is in extrusion fit with the upper edge of the sealing rubber ring.

[0012] Furthermore, the threaded section is an internal threaded hole, the threaded pressing member is an external threaded nut, a perforation is provided in the center of the threaded pressing member, and the central axis of the perforation is coaxially arranged with the central axis of the electric cable channel.

[0013] Furthermore, gaskets are provided between the bottom surface of the annular groove and the sealing rubber ring, and between the lower edge of the threaded pressing member and the sealing rubber ring.

[0014] Furthermore, a plurality of wire threading sleeves are provided, and the radial dimensions of the electric cable channels of the plurality of wire threading sleeves are any size between 8 and 50 mm.

[0015] Furthermore, a stop valve is installed at the pressurizing port, and the stop valve is connected to the pressure pipeline.

[0016] Furthermore, an outward-turning edge is provided on the outer side of the tank opening, a reinforcing rib is connected between the outward-turning edge and the outer wall of the pressure tank body, and a sealing groove is provided on the upper side of the outward-turning edge.

[0017] Furthermore, a plurality of mounting holes are respectively provided on the outward-turning edge and the tank cover, the plurality of mounting holes are circumferentially spaced apart with respect to the pressure tank body, and the fastener is a fastening bolt penetrating through the mounting holes.

[0018] Compared with the prior art, a water-resistant and sealed pressure testing device of the present utility model has the following beneficial effects: The water-resistant and sealed pressure testing device adopts a design form of a pressure tank body, a tank cover, fasteners, a pressure gauge, a hydraulic press, and a wire threading sleeve. The tank cover is detachably installed at the tank opening of the pressure tank body, and fasteners are connected between the pressure tank body and the tank cover. During use, first open the tank opening, place the outboard electrical equipment to be tested in the pressure tank body, lead the cable of the outboard electrical equipment out through the wire threading sleeve of the tank cover, then fill fresh water in the pressure tank body to submerge the outboard electrical equipment, and observe for one hour to ensure that there is no water seepage inside the equipment; then fix and connect the tank cover to the tank opening of the pressure tank body through the fasteners, and a water pressure testing chamber is formed inside the pressure tank body.

[0019] Moreover, a pressure measurement interface is provided on the tank cover, the pressure gauge is installed at the pressure measurement interface, a pressurization port is also provided on the tank cover, and a pressure pipeline is connected between the hydraulic press and the pressurization port. When starting the test, start the hydraulic press to inject high-pressure water into the pressure tank body through the pressure pipeline and the pressurization port, and at the same time observe the real-time water pressure value of the pressure gauge. When the water pressure reaches the set test pressure, turn off the hydraulic press and maintain the test pressure for a period of time. Finally, check whether there is any damage at the connection of the outboard electrical equipment and the cable. For example: when the set test pressure is 3.8 Mpa and the pressure does not drop after half an hour of pressure holding, it can be determined that the water-resistant seal of the outboard electrical equipment and the cable meets the technical requirements. In addition, a wire threading sleeve is also provided on the tank cover. The inside of the wire threading sleeve is provided with a cable channel, as well as an annular groove and a threaded section located in the cable channel. A sealing rubber ring is arranged in the annular groove, and a threaded pressing part is installed on the threaded section.

[0020] During use, the cable passes through and leads out from the cable channel of the wire threading sleeve. The sealing rubber ring is arranged in the annular groove, and the threaded pressing part and the sealing rubber ring are in extrusion fit in the axial direction of the cable channel. The axial extrusion causes the sealing rubber ring to undergo radial expansion deformation. The sealing rubber ring tightly clamps the cable inward and expands tightly against the annular groove outward, thereby effectively eliminating the gap between the cable and the cable channel, meeting the requirements of cable lead-out and pressure resistance testing, and being able to simultaneously test the water-resistant seal of the outboard electrical equipment and the cable connection, avoiding the problem that the outboard electrical equipment may leak and be damaged in the underwater pressure environment. Description of the Drawings

[0021] Figure 1 is a schematic structural diagram of the water-resistant and sealed pressure testing device in the embodiment of the present utility model;

[0022] Figure 2 is an assembly sectional view of the wire threading sleeve and the cable in the embodiment of the present utility model;

[0023] Figure 3 is a front view schematic diagram of the pressure tank body, the tank cover, and the wire threading sleeve in the embodiment of the present utility model;

[0024] Figure 4 It is a top view schematic diagram of the can lid in the embodiment of the present utility model;

[0025] Figure 5 It is a cross-sectional schematic diagram of the pressure tank body in the embodiment of the present utility model;

[0026] In the figure: 1 - pressure tank body, 10 - can mouth, 11 - pressure measurement interface, 12 - pressurization port, 13 - stop valve, 14 - outer turned edge, 15 - reinforcing rib, 16 - sealing groove, 17 - mounting hole, 2 - can lid, 20 - fastener, 3 - pressure gauge, 4 - hydraulic press, 40 - pressure pipeline, 5 - wire threading sleeve, 50 - cable channel, 51 - annular groove, 52 - threaded section, 53 - sealing rubber ring, 54 - washer, 55 - threaded compression piece, 6 - external electrical equipment, 60 - cable wire. Specific embodiments

[0027] The following combines the accompanying drawings and embodiments to further describe in detail the specific embodiments of the present utility model. The following embodiments are used to illustrate the present utility model, but are not used to limit the scope of the present utility model.

[0028] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. in the present utility model is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present utility model.

[0029] In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, "a plurality" means two or more, unless otherwise specifically defined.

[0030] In the present utility model, unless otherwise clearly defined and limited, terms such as "installation", "connection", "attachment", "fixation" and the like shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral body; it may be a direct connection, or an indirect connection through an intermediate medium, and may be the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0031] As Figures 1 to 5 shown, a water-resistant and sealed pressure testing device according to an embodiment of the present utility model includes a pressure tank body 1, a tank cover 2, a fastener 20, a pressure gauge 3 and a hydraulic press 4. The pressure tank body 1 is provided with a tank opening 10. The tank cover 2 is detachably installed at the tank opening 10, and the fastener 20 is connected between the tank cover 2 and the pressure tank body 1; a pressure measuring interface 11 is provided on the tank cover 2, and the pressure gauge 3 is installed at the pressure measuring interface 11 for detecting the internal water pressure of the pressure tank body 1. In order to meet different usage requirements, in other embodiments, the pressure measuring interface and the pressure adding port can also be provided on the pressure tank body, and the internal water pressure can also be detected and the water pressure in the tank can be increased.

[0032] A pressure adding port 12 is further provided on the tank cover 2, and a pressure pipeline 40 is connected between the hydraulic press 4 and the pressure adding port 12; a wire threading sleeve 5 is further provided on the tank cover 2. An electric cable channel 50 is provided inside the wire threading sleeve 5, and an annular groove 51 and a threaded section 52 are located in the electric cable channel 50. A sealing rubber ring 53 is arranged in the annular groove 51, a threaded pressing member 55 is installed on the threaded section 52, and the threaded pressing member 55 and the sealing rubber ring 53 are in pressing fit in the axial direction of the electric cable channel 50.

[0033] The water-resistant and sealed pressure testing device adopts the design form of the pressure tank body 1, the tank cover 2, the fastener 20, the pressure gauge 3, the hydraulic press 4 and the wire threading sleeve 5. The tank cover 2 is detachably installed at the tank opening 10 of the pressure tank body 1, and the fastener 20 is connected between the pressure tank body 1 and the tank cover 2. During use, first open the tank opening 10, place the outboard electrical equipment 6 to be tested in the pressure tank body 1, and lead the cable 60 of the outboard electrical equipment 6 out through the wire threading sleeve 5 of the tank cover 2. Then, add fresh water covering the outboard electrical equipment 6 into the pressure tank body, and observe for one hour to confirm that there is no water seepage inside the equipment; then fix and connect the tank cover 2 to the tank opening 10 of the pressure tank body 1 through the fastener 20, and a water pressure testing cavity is formed inside the pressure tank body 1.

[0034] In addition, a pressure measuring interface 11 is provided on the tank cover 2, and a pressure gauge 3 is installed at the pressure measuring interface 11. A pressure port 12 is also provided on the tank cover 2, and a pressure pipeline 40 is connected between the hydraulic press 4 and the pressure port 12. When the test starts, the hydraulic press 4 is started to inject high-pressure water into the pressure tank body 1 through the pressure pipeline 40 and the pressure port 12, and the real-time water pressure value of the pressure gauge 3 is observed at the same time. When the water pressure reaches the set test pressure, the hydraulic press 4 is turned off, and the test pressure is maintained for a period of time. Finally, whether there is any damage at the connection of the outboard electrical equipment 6 and the cable 60 is checked. For example: the set test pressure is 3.8Mpa, and the pressure does not drop after half an hour of pressure maintenance, which can determine that the water-resistant seal of the outboard electrical equipment 6 and the cable 60 meets the technical requirements. In addition, a wire threading sleeve 5 is also provided on the tank cover 2. The wire threading sleeve 5 has a cable channel 50 inside, and an annular groove 51 and a threaded section 52 located in the cable channel 50. A sealing rubber ring 53 is provided in the annular groove 51, and a threaded clamp 55 is installed on the threaded section 52.

[0035] When in use, the cable 60 is led out from the cable channel 50 of the threading sleeve 5, the sealing rubber ring 53 is arranged in the annular groove 51, and the threaded pressing member 55 and the sealing rubber ring 53 are pressed and matched in the axial direction of the cable channel 50, and the axial pressing effect causes the sealing rubber ring 53 to expand and deform radially. The sealing rubber ring 53 tightens the cable 60 inwardly and expands the annular groove 51 outwardly, thereby effectively eliminating the gap between the cable 60 and the cable channel 50, meeting the requirements of the lead-out and pressure resistance test of the cable 60, and being able to simultaneously test the water-resistant sealing of the outboard electrical equipment 6 and the cable connection, avoiding the problem of possible leakage and damage of the outboard electrical equipment in an underwater pressure environment.

[0036] In this embodiment, the annular groove 51 is located in the axial middle of the cable channel 50, the inner diameter of the annular groove 51 is larger than the inner diameter of the cable channel 50, and the bottom surface of the annular groove 51 is stopped and matched with the lower edge of the sealing rubber ring 53. The inner diameter of the annular groove 51 is larger than the inner diameter of the cable channel 50, and the bottom surface of the annular groove 51 is the annular step surface in the cable channel 50, and the annular step surface can reliably stop the sealing rubber ring 53. In addition, the threaded section 52 is located at the axial end of the cable channel 50, and the inner diameter of the threaded section 52 is larger than the inner diameter of the annular groove 51. The lower edge of the threaded clamp 55 is pressed and matched with the upper edge of the sealing rubber ring 53, ensuring that the threaded section 52 has an assembly space to accommodate the threaded clamp 55, and the axial extrusion force can be effectively generated on the sealing rubber ring 53 through spiral assembly.

[0037] Specifically, the threaded section 52 is an internal threaded hole, and the threaded pressing member 55 is an external threaded nut with a central opening. It should be noted that a perforation is provided in the center of the threaded pressing member 55, and the central axis of the perforation is coaxially arranged with the central axis of the cable channel 50, which can allow the cable 60 to be smoothly led outwards. The axial dimension of the threaded pressing member 55 is greater than the axial dimension of the threaded section 52. A hexagonal anti-rotation portion is provided at the upper end of the threaded pressing member 55. By using a wrench to hold the hexagonal anti-rotation portion, the external threaded nut can be rotated, so that the sealing rubber ring 53 can reliably press and seal the cable 60.

[0038] In this embodiment, gaskets 54 are provided between the bottom surface of the annular groove 51 and the sealing rubber ring 53, and between the lower edge of the threaded pressing member 55 and the sealing rubber ring 53. The gaskets 54 can eliminate the gaps between the sealing rubber ring 53 and the bottom surface of the annular groove 51, and between the sealing rubber ring 53 and the lower edge of the threaded pressing member 55, which can further improve the sealing performance of the cable 60. The whole device can meet the pressure test requirements of 0 - 5 Mpa. Moreover, multiple threading sleeves 5 are provided, and the radial dimensions of the cable channels 50 of the multiple threading sleeves 5 can be any size between 8 - 50 mm to adapt to the threading of cable 60 with different diameters.

[0039] As a further preferred solution, a stop valve 13 is installed at the pressure port 12. The stop valve 13 is connected to the pressure pipeline 40. When injecting water, the stop valve 13 is opened to inject high-pressure water into the pressure tank body 1. When the set pressure is reached, the stop valve 13 is closed to ensure that the water pressure inside the pressure tank body 1 remains unchanged for a long time. An outward flange 14 is also provided on the outside of the tank opening 10. A reinforcing rib 15 is connected between the outward flange 14 and the outer wall of the pressure tank body 1. A sealing groove 16 is provided on the upper side of the outward flange 14, and a rubber sealing ring can be arranged in the sealing groove 16 to improve the sealing performance between the tank cover 2 and the outward flange 14.

[0040] In addition, a plurality of mounting holes 17 are respectively provided on the outward flange 14 and the tank cover 2. The plurality of mounting holes 17 are circumferentially spaced apart with respect to the pressure tank body 1. The fastener 20 is a fastening bolt that penetrates through the mounting holes 17. By passing the fastening bolt through the mounting holes 17 of the tank cover 2 and the mounting holes 17 of the outward flange 14, and screwing a nut on the protruding end of the fastening bolt, the purpose of detachable sealed installation of the tank cover 2 and the pressure tank body 1 is achieved.

[0041] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and replacements can be made, and these improvements and replacements should also be regarded as the protection scope of the present invention.

Claims

1. A water-resistant sealing pressure testing device, characterized in that, It includes a pressure tank body, a tank cover, fasteners, a pressure gauge and a hydraulic press. The pressure tank body is provided with a tank opening, the tank cover is detachably installed at the tank opening, and the fasteners are connected between the tank cover and the pressure tank body; A pressure measurement interface is provided on the pressure tank body or the tank cover, and the pressure gauge is installed at the pressure measurement interface for detecting the internal water pressure of the pressure tank body. A pressure addition port is also provided on the pressure tank body or the tank cover, and a pressure pipeline is connected between the hydraulic press and the pressure addition port; A wire threading sleeve is further provided on the tank cover. The inside of the wire threading sleeve is provided with a cable channel, as well as an annular groove and a threaded section located in the cable channel. A sealing rubber ring is arranged in the annular groove, a threaded pressing member is installed in the threaded section, and the threaded pressing member and the sealing rubber ring are in pressing fit in the axial direction of the cable channel.

2. The water-resistant and sealed pressure testing device according to claim 1, characterized in that, The annular groove is located in the axial middle of the cable channel. The inner diameter of the annular groove is larger than the inner diameter of the cable channel, and the bottom surface of the annular groove is in stop fit with the lower edge of the sealing rubber ring.

3. The water-resistant and sealed pressure testing device according to claim 2, wherein The threaded section is located at the axial end of the cable channel, and the inner diameter of the threaded section is larger than the inner diameter of the annular groove. The lower edge of the threaded pressing member is in pressing fit with the upper edge of the sealing rubber ring.

4. The water-resistant and sealed pressure testing device according to claim 3, characterized in that, The threaded section is an internal threaded hole, the threaded pressing member is an external threaded nut, and a through hole is provided in the center of the threaded pressing member. The central axis of the through hole is coaxially arranged with the central axis of the cable channel.

5. The water-resistant and sealed pressure testing device according to claim 1, characterized in that, Washers are provided between the bottom surface of the annular groove and the sealing rubber ring, and between the lower edge of the threaded pressing member and the sealing rubber ring.

6. The water-resistant sealing pressure testing device according to claim 1, characterized in that, A plurality of wire threading sleeves are provided, and the radial dimensions of the cable channels of the plurality of wire threading sleeves are any size between 8 and 50 mm.

7. The water-resistant and sealed pressure testing device according to claim 1, characterized in that, A stop valve is installed at the pressure addition port, and the stop valve is connected to the pressure pipeline.

8. The water-resistant and sealed pressure testing device according to claim 1, characterized in that, An outward-turning edge is further provided on the outside of the tank opening. A reinforcing rib is connected between the outward-turning edge and the outer wall of the pressure tank body, and a sealing groove is provided on the upper side of the outward-turning edge.

9. The water-resistant seal pressure testing device according to claim 8, characterized in that, A plurality of mounting holes are respectively provided on the outward-turning edge and the tank cover. The plurality of mounting holes are circumferentially spaced apart with respect to the pressure tank body, and the fasteners are fastening bolts penetrating through the mounting holes.

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