A detection device for a water channel bottom check valve

Abstract

The application discloses a detection device for a check valve at the bottom of a water channel, which comprises a shell, a first sealing element, at least one pressurizing element, a first pressure detecting element and a connecting assembly. The shell is formed with a sealing cavity and a first opening communicating with the sealing cavity. The first sealing element is connected to the end of the first opening of the shell. The pressurizing element is connected to the shell and communicates with the sealing cavity, and is used for pressurizing the inside of the sealing cavity. The first pressure detecting element is connected to the shell and is used for detecting the internal pressure of the sealing cavity. The connecting assembly is connected to the shell and can be detachably connected with the bottom of the water channel. The application can effectively solve the problem that the detection device needs to put the valve bodies into the detection device one by one, so that the detection of the check valve cannot be performed in the harsh working environment at the bottom of the water channel.

Description

Technical Field

[0001] The present invention relates to the technical field of canal valve body detection, and in particular to a detection device for a check valve at the bottom of a canal. Background Art

[0002] As the service time of various large-scale canals increases, various problems may inevitably arise in the various supporting equipment attached to the canals. Therefore, it is necessary to conduct functional inspections on valve bodies, etc. to avoid negative effects such as a decrease in water carrying capacity in the canals.

[0003] To avoid the low efficiency of manual inspection, related inspection devices or systems have emerged. For example, the Chinese invention patent with publication number CN113390584A is titled: A valve body inspection system, comprising a conveying device provided with a placement station for placing the valve body, a detection device for detecting the airtightness and appearance information of the valve body at the placement station, a transport device for moving the valve body at the placement station to a target position, and a controller communicatively connected to the conveying device, the detection device, and the transport device. The conveying device is used to drive the valve body at the placement station to move. The controller can control the operation of the conveying device and the detection device to receive and analyze the detection information of the detection device, and obtain the target position information of the valve body according to the detection information. The controller can control the operation of the transport device based on the target position information. This device automates the valve body inspection process, reduces the labor intensity of the staff, and improves work efficiency. However, during inspection, the valve bodies need to be placed into the detection device one by one, which makes it impossible to inspect the check valve in the harsh working environment of the bottom of the canal. Summary of the Invention

[0004] The purpose of the present invention is to overcome the above-mentioned technical deficiencies and propose a detection device for a check valve at the bottom of a canal to solve the technical problem in the prior art that the check valve cannot be detected in such a harsh working environment as the valve bodies need to be placed into the detection device one by one.

[0005] In order to achieve the above technical objectives, the present invention adopts the following technical solutions:

[0006] The present invention provides a detection device for a check valve at the bottom of a water channel, comprising:

[0007] A housing is formed with a sealed cavity and a first opening communicating with the sealed cavity;

[0008] a first sealing member connected to an end portion of the first opening of the housing;

[0009] at least one pressurizing member connected to the housing and in communication with the sealed cavity, for applying pressure to the interior of the sealed cavity;

[0010] a first pressure detecting member connected to the shell and configured to detect the internal pressure of the sealed cavity; and

[0011] a connecting assembly connected to the shell and configured to detachably connect to the bottom of the water channel.

[0012] In some embodiments, the shell comprises a cylinder and a sealing cover, the cylinder is hollow inside, and one end of the cylinder is formed with the first opening communicating with the inside of the cylinder, and the other end of the cylinder is formed with the second opening communicating with the inside of the cylinder, the cylinder is covered with the check valve through the first opening, and the sealing cover is sealingly connected to the cylinder to block the second opening of the cylinder, so as to form the sealed cavity together with the cylinder, and the first sealing member is connected to the cylinder and arranged around the first opening of the cylinder.

[0013] In some embodiments, the second opening of the cylinder is formed with a first annular outer frame, the sealing cover is detachably connected to the first annular outer frame, and the shell further comprises at least one rib plate, the rib plate is spaced apart along the circumferential direction of the cylinder and connected to the circumferential outer wall of the cylinder and the first annular outer frame.

[0014] In some embodiments, the first opening of the cylinder is formed with a first annular inner frame, the first sealing member is elastic, the first sealing member is formed with a first annular inner groove relative to the first annular inner frame, the first sealing member is sleeved on the first annular inner frame through the first annular groove and detachably connected to the first annular inner frame, and the circumferential outer wall of the first sealing member is formed with an arc-shaped filtering surface, so that the diameter of the cross section of the first sealing member gradually decreases in the direction away from the cylinder.

[0015] In some embodiments, the connecting assembly comprises a connecting cover, a second sealing member, at least one negative pressure member, and a second pressure detecting member, the connecting cover is sleeved on the cylinder and connected to the cylinder, and the inner wall of the connecting cover and the outer wall of the cylinder and the bottom of the water channel together form a negative pressure cavity, the second sealing member is connected to the connecting cover and can sealingly abut against the bottom of the water channel, the negative pressure member is connected to the shell and communicates with the negative pressure cavity, so as to form negative pressure inside the negative pressure cavity and make the connecting cover and the cylinder adsorbed to the bottom of the water channel, and the second pressure detecting member is connected to the connecting cover and configured to detect the internal pressure of the negative pressure cavity.

[0016] In some embodiments, the interior of the connecting cover is hollow and has a third opening connected to its interior. A second annular outer frame is formed at the third opening of the connecting cover. The second seal is elastic. The second seal is arranged relative to the second annular outer frame, and the second seal is sleeved on the second annular outer frame through the second annular groove and is detachably connected to the second annular outer frame. The circumferential outer wall of the second seal is formed with a stepped filtering surface so that the diameter of the cross section of the second seal gradually increases in the direction away from the cylinder.

[0017] In some embodiments, the connection assembly further includes four balance adjustment members, which are respectively disposed around the cylinder and detachably connected to the second annular outer frame.

[0018] In some embodiments, the balance adjustment member includes a connecting seat and a propeller, the four connecting seats are distributed at intervals along the circumference of the connecting cover and are respectively connected to the second annular outer frame, and the propeller is arranged in a one-to-one correspondence with the connecting seat and connected to the connecting seat.

[0019] In some embodiments, the diameter of the cylinder gradually decreases in the direction approaching the first seal, and the connecting assembly also includes a third annular outer frame, which is connected to one end of the connecting cover close to the cylinder, and the circumferential inner wall of the third annular outer frame abuts against the circumferential outer wall of the cylinder.

[0020] In some embodiments, the connecting assembly further includes two armrests, which are arranged on opposite sides of the cylinder and are respectively connected to the connecting cover.

[0021] Compared with the prior art, the beneficial effects of the detection device for the check valve at the bottom of the canal provided by the present invention include: the shell is provided with a sealed cavity and a first opening connected to the sealed cavity, the first sealing member is connected to the end of the first opening of the shell, and is used to seal and press against the bottom of the canal, at least one pressurizing member and a first pressure detecting member are connected to the shell, and are respectively used to pressurize the sealed cavity or detect the pressure in the sealed cavity, the connecting assembly is connected to the shell and can be detachably connected to the bottom of the canal. Compared with the prior art, by placing the shell into the canal and connecting the shell to the bottom of the canal through the connecting assembly, and at the same time, by arranging the first opening of the shell above the check valve and sealing and pressing against the bottom of the canal through the first sealing member, the check valve can be placed in a closed sealed cavity, and the sealed cavity is pressurized by using at least one pressurizing member, so that the check valve at the bottom of the canal can be effectively detected by adjusting the positive pressure in the positive sealed cavity. There is no need to place the valve bodies one by one into the detection device, and it can be adapted to the detection of the check valve at the bottom of the canal. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a three-dimensional structural schematic view of a detection device for a water channel bottom check valve provided by an embodiment of the present application;

[0023] Figure 2 is a three-dimensional structural schematic view of a connecting assembly provided by an embodiment of the present application;

[0024] Figure 3 is a three-dimensional structural schematic view of the connecting assembly from another perspective provided by an embodiment of the present application;

[0025] Figure 4 is a three-dimensional structural schematic view of the connecting assembly from yet another perspective provided by an embodiment of the present application;

[0026] Figure 5 is a three-dimensional structural schematic view of the shell connected with the first sealing member, the pressurizing member and the first pressure detection member provided by an embodiment of the present application;

[0027] Figure 6 is a three-dimensional structural schematic view of the shell connected with the first sealing member, the pressurizing member and the first pressure detection member from another perspective provided by an embodiment of the present application;

[0028] Figure 7 is a three-dimensional structural schematic view of the first sealing member provided by an embodiment of the present application.

[0029] Legend of reference signs:

[0030] shell 1; cylinder 11; upper cabin section 111; middle cabin section 112; lower cabin section 113; sealing cover 12; first annular outer frame 13; rib plate 14; first flange plate 16; first sealing member 2; sealing ring 21; arc-shaped transition surface 22; pressurizing member 3; first clamp 31; first threaded blind plate 32; air inlet pipe joint 34; first air inlet pipe 35; first pressure detection member 4; second clamp 41; second threaded blind plate 42; first pressure sensor 44; second air inlet pipe 45; connecting assembly 5; connecting cover 51; second annular outer frame 511; second sealing member 52; sealing ring pressing ring 521; negative pressure member 53; third clamp 531; third threaded blind plate 532; air outlet pipe joint 534; first air outlet pipe 535; second pressure detection member 54; fourth clamp 541; second pressure sensor 544; second air outlet pipe 545; balance adjustment member 55; connecting seat 551; propeller 552; third annular outer frame 56; handrail 57. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solutions and advantages of the present application more clear and understandable, the present application is further described in detail below in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and do not limit the present application.

[0032] In order to solve the technical problem that the detection device needs to place the valve bodies one by one into the detection device, resulting in the inability to detect the check valve in a harsh working environment such as the bottom of the canal, the present invention provides a detection device for the check valve at the bottom of the canal, which can be achieved by placing the shell 1 into the canal and connecting the shell 1 to the bottom of the canal through the connecting component 5. At the same time, by covering the shell 1 above the check valve and sealing it with the bottom of the canal through the first sealing member 2, the check valve can be in a closed sealing cavity, and the sealing cavity is pressurized by using at least one pressurizing member 3, so that the check valve at the bottom of the canal can be effectively detected by adjusting the positive pressure in the positive sealing cavity. There is no need to place the valve bodies one by one into the detection device, and it can be adapted to the detection of the check valve at the bottom of the canal.

[0033] See also Figures 1 to 5 , Figure 1 This is a structural schematic diagram of a detection device for a check valve at the bottom of a canal in one embodiment of the present invention. The detection device for a check valve at the bottom of a canal includes: a shell 1, a first sealing member 2, at least one pressurizing member 3, a first pressure detecting member 4 and a connecting assembly 5. The shell 1 is formed with a sealed cavity and a first opening connected to the sealed cavity. The first sealing member 2 is connected to the end of the first opening of the shell 1. The pressurizing member 3 is connected to the shell 1 and is connected to the sealed cavity for pressurizing the interior of the sealed cavity. The first pressure detecting member 4 is connected to the shell 1 for detecting the internal pressure of the sealed cavity. The connecting assembly 5 is connected to the shell 1 and can be detachably connected to the bottom of the canal.

[0034] In this device, if Figure 1 、 Figure 5 and Figure 7 As shown, the shell 1 is provided with a sealed cavity and a first opening connected to the sealed cavity. The first sealing member 2 is connected to the end of the first opening of the shell 1 and is used to seal tightly against the bottom of the canal. At least one pressurizing member 3 and a first pressure detecting member 4 are connected to the shell 1 and are used to pressurize the sealed cavity or detect the pressure in the sealed cavity, respectively. The connecting assembly 5 is connected to the shell 1 and can be detachably connected to the bottom of the canal.

[0035] Compared with the existing technology, the shell 1 is placed in the canal and the shell 1 is connected to the bottom of the canal through the connecting assembly 5. At the same time, the first opening of the shell 1 is covered above the check valve and sealed against the bottom of the canal through the first sealing member 2, so that the check valve can be in a closed sealing cavity. The sealing cavity is pressurized by using at least one pressurizing member 3, and the check valve at the bottom of the canal can be effectively detected by adjusting the positive pressure in the positive sealing cavity. There is no need to place the valve bodies one by one in the detection device, and it can be adapted to the detection of the check valve at the bottom of the canal.

[0036] Furthermore, since the check valve is arranged at the bottom of the canal, it is not convenient to remove the check valve and then conduct inspection. Not only is the operation inconvenient, but frequent disassembly and assembly will also affect the sealing effect. The present invention connects the device for detection to the bottom of the canal in a detachable manner through the connecting component 5, and uses the shell 1 to cover the check valve. At the same time, the first sealing member 2 is used to form a sealing abutment with the bottom of the canal, so that pressurization is formed under the action of at least one pressurizing member 3, which is used to detect the performance of the check valve. At the same time, the detection of the first pressure detection member 4 can facilitate the user to adjust the pressure in the sealing chamber, so that the check valve at the bottom of the canal can be effectively detected by adjusting the positive pressure in the positive sealing chamber.

[0037] In this example, if Figures 5 to 7 As shown, the housing 1 includes a cylinder 11 and a sealing cover 12. The interior of the cylinder 11 is hollow, and a first opening is formed at one end thereof, which is connected to the interior thereof, and a second opening is formed at the other end thereof, which is connected to the interior thereof. The cylinder 11 is provided with a check valve via the first opening; the sealing cover 12 is sealingly connected to the cylinder 11, and is used to block the second opening at one end of the cylinder 11, and is used to enclose the cylinder 1 to form a sealed cavity. The first sealing member 2 is connected to the cylinder 11 and is arranged around the first opening. The sealing cover 12 and the first sealing member 2 are respectively arranged at the second opening and the first opening at the end of the cylinder 11, so that the interior of the cylinder 11 can form a closed sealed cavity.

[0038] Furthermore, the first sealing member 2 is annular, which can increase the airtightness between the first sealing member 2 and the cylinder 11 and the bottom of the canal, thereby improving the detection effect.

[0039] In one embodiment, Figure 5 、 Figure 6 As shown, a first annular outer frame 13 is formed at the second opening of the cylinder 11, and the sealing cover 12 is detachably connected to the first annular outer frame 13. The shell 1 also includes at least one rib 14, which is spaced apart along the circumferential direction of the cylinder 11 and is connected to the circumferential outer wall of the cylinder 11 and the first annular outer frame 13.

[0040] The sealing cover 12 is detachably connected to the cylinder 11 through the first annular outer frame 13. A plurality of ribs 14 are arranged at intervals along the circumference of the cylinder 11 to prevent the second opening of the cylinder 11 from deforming under pressure, thereby improving detection efficiency.

[0041] Furthermore, the first annular outer frame 13 and the sealing cover 12 are respectively provided with connecting through holes, and are connected by fastening connectors such as bolts and nuts. This is a conventional setting known to those skilled in the art and will not be described in detail here.

[0042] In one embodiment, Figure 6As shown, a first annular inner frame is formed at the first opening of the cylinder 11, the first sealing member 2 is elastic, and a first annular inner groove is formed on the first sealing member 2 relative to the first annular inner frame. The first sealing member 2 is sleeved on the first annular inner frame through the first annular groove and is detachably connected to the first annular inner frame, and an arc-shaped transition surface 22 is formed on the circumferential outer wall of the first sealing member 2 so that the diameter of the cross section of the first sealing member 2 gradually decreases in the direction away from the cylinder 11.

[0043] The first sealing member 2 is elastic and is sleeved on the cylinder 11 through a first annular inner frame, thereby increasing airtightness.

[0044] Furthermore, an arc-shaped transition surface 22 is formed on the circumferential outer wall of the first sealing member 2 , which can increase the contact area between the first sealing member 2 and the bottom of the channel and improve the airtightness of the connection.

[0045] In one embodiment, Figure 5 、 Figure 6 As shown, the sealing cover 12 is a hemispherical structure. By designing the sealing cover 12 into a hemispherical shape, the curvature radius of the sealing cover 12 is equal everywhere, so that the sealing cover 12 is evenly stressed under high pressure, and the outer side of the sealing cover 12 is fixedly connected to the first flange 16; the cylinder 11 is composed of an upper cabin section 111, a middle cabin section 112 and a lower cabin section 113, wherein the upper cabin section 111, the middle cabin section 112 and the lower cabin section 113 are integrally processed and formed from lightweight and high-pressure resistant aluminum alloy, high-strength steel, magnesium alloy, titanium alloy and other metal materials, which greatly improves the safety of the detection device; the inner diameter of the upper cabin section 111 gradually increases in the direction away from the pressurized part 3, and the inner diameter of the middle cabin section 112 gradually decreases in the direction away from the pressurized part 3. The lower compartment section 113 is small and has a cylindrical structure; the diameter of the lower end of the upper compartment section 111 is the same as the diameter of the upper end of the middle compartment section 112, wherein the diameter of the lower end of the middle compartment section 112 is the same as the diameter of the lower compartment section 113; the lower end of the upper compartment section 111 is fixedly connected to the upper end of the middle compartment section 112, wherein the lower end of the middle compartment section 112 is fixedly connected to the upper end of the lower compartment section 113; the outer wall of the upper end of the upper compartment section 111 is provided with a first annular outer frame 13, wherein the first annular outer frame 13 is adapted to the first flange 16 provided on the outer side of the sealing cover 12; four ribs 14 are equidistantly provided along the circumference of the outer wall of the upper compartment section 111 below the first annular outer frame 13, wherein the top of each rib 14 is fixedly connected to the bottom of the first annular outer frame 13.

[0046] Furthermore, the diameters of the connection between the upper compartment section 111 and the middle compartment section 112 remain the same, so that the upper compartment section 111 and the middle compartment section 112 form an olive shape. This design can enhance the ability of the inner wall of the cylinder 11 to withstand positive pressure; at the same time, by arranging a first annular outer frame 13 on the outer wall of the upper end of the upper compartment section 111 to match the first flange 16 arranged on the outer edge of the sealing cover 12, and using fixing bolts to fix the first flange 16 to the first annular outer frame 13, the sealing cover 12 is connected to the cylinder 11, and four ribs 14 are equidistantly arranged at the connection between the first annular outer frame 13 and the upper compartment section 111. The ribs 14 are used to support the first annular outer frame 13, which can effectively improve the firmness and sealing of the connection between the first annular outer frame 13 and the first flange 16, thereby greatly improving the pressure resistance of the cylinder 11.

[0047] In one embodiment, Figures 5 to 7 As shown, the first sealing member 2 is made of rubber material, wherein the upper end of the first sealing member 2 is fixedly connected to the bottom of the cylinder 11; a trumpet-shaped sealing ring 21 is provided at the upper end of the first sealing member 2, wherein the sealing ring 21 and the first sealing member 2 are integrally arranged; the diameter of the upper end of the sealing ring 21 is smaller than the outer diameter of the lower end of the cylinder 11, wherein the sealing ring 21 is tightly fitted to the outer wall of the lower end of the cylinder 11; a plurality of connecting holes are equidistantly provided along the circumference of the first sealing member 2, wherein the connecting holes are vertically arranged and pass through the first sealing member 2, and fixing screws are provided in the connecting holes; the lower end of the outer wall of the first sealing member 2 gradually decreases from top to bottom, wherein the outer wall of the first sealing member 2 is provided with an arc-shaped transition surface 22.

[0048] Furthermore, the inner diameter of the upper end of the sealing ring 21 is smaller than the outer diameter of the lower end of the cylinder 11. Since the sealing ring 21 is made of rubber material, it has good elasticity. When the lower end of the cylinder 11 is inserted into the first sealing member 2 from the upper end of the sealing ring 21, it passes through the connecting hole through the fixing screw and is fixedly connected to the bottom of the cylinder 11. The sealing ring 21 fits tightly against the outer wall of the lower end of the cylinder 11 and maintains a certain friction force, thereby improving the sealing performance of the connection between the cylinder 11 and the first sealing member 2; the lower end of the outer side wall of the first sealing member 2 gradually decreases from top to bottom and opens an arc-shaped transition surface 22. When the detection device is subjected to the positive pressure of the sealing chamber and the negative pressure of the connecting cover 51, the design of the arc-shaped transition surface 22 can provide a certain buffering effect to avoid damage to the detection device.

[0049] In one embodiment, Figure 5 、 Figure 6As shown, the pressurizing member 3 includes a first clamp 31, a first tapped blind plate 32, a first sealing ring, an air intake pipe joint 34 and a first air intake pipe 35, the lower end of the first air intake pipe 35 passes through the sealing cover 12 and is connected to the inner cavity of the cylinder 11, wherein the upper end of the first air intake pipe 35 is detachably connected to the first tapped blind plate 32; an air intake pipe joint 34 is installed above the first tapped blind plate 32, wherein the air intake pipe joint 34 is connected to the first air intake pipe 35; the first clamp 31 is arranged on the outside of the first tapped blind plate 32, wherein a first sealing ring is provided between the inner ring of the first clamp 31 and the first tapped blind plate 32.

[0050] Furthermore, a first clamp 31 is used to fix the first tapped blind plate 32 to the first air inlet pipe 35, and a first sealing ring is installed between the first clamp 31 and the first tapped blind plate 32, thereby improving the sealing performance of the connection between the first tapped blind plate 32 and the first air inlet pipe 35; the air inlet pipe joint 34 can be connected to a rubber hose and connected to the exhaust port of an air compressor (not shown in the figure), wherein the high-pressure air provided by the air compressor is transported to the interior of the sealed cavity by the first air inlet pipe 35, and the functionality of the target check valve is tested by changing the pressure of the high-pressure air inside the sealed cavity.

[0051] In one embodiment, Figure 5 、 Figure 6 As shown, the first pressure detection component 4 includes a second clamp 41, a second tapped blind plate 42, a second sealing ring, a first pressure sensor 44 and a second air inlet pipe 45, the lower end of the second air inlet pipe 45 passes through the sealing cover 12 and is connected to the inner cavity of the cylinder 11, wherein the upper end of the second air inlet pipe 45 is detachably connected to the second tapped blind plate 42; a first pressure sensor 44 is fixedly installed above the second tapped blind plate 42, wherein the air inlet end of the first pressure sensor 44 is connected to the second air inlet pipe 45; the second clamp 41 is arranged on the outside of the second tapped blind plate 42, wherein a second sealing ring is provided between the inner ring of the second clamp 41 and the second tapped blind plate 42.

[0052] Furthermore, a second clamp 41 is used to fix the second tapped blind plate 42 to the second air inlet pipe 45, and a second sealing ring is installed between the second clamp 41 and the second tapped blind plate 42 to facilitate improving the sealing of the connection between the second tapped blind plate 42 and the second air inlet pipe 45; the pressure signal inside the sealed cavity is received by the first pressure sensor 44, and the collected pressure signal is transmitted to the staff's handheld mobile terminal, thereby achieving the purpose of detecting the functionality of the target check valve.

[0053] In this embodiment, Figures 1 to 4 As shown, the connection assembly 5 includes a connection cover 51 , a second sealing member 52 , at least one negative pressure member 53 and a second pressure detection member 54 , four balance adjustment members 55 , a third annular outer frame 56 , and two handrails 57 .

[0054] Among them, the interior of the connecting cover 51 is hollow, and a third opening connected to its interior is opened on one side. The connecting cover 51 also has a mounting hole connected to its interior, and the connecting cover 51 is sleeved on the cylinder 11 through the mounting hole and connected to the cylinder 11, and a negative pressure chamber is formed between the inner wall of the connecting cover 51 and the outer wall of the cylinder 11 and the bottom of the canal. The second sealing member 52 is connected to the end of the third opening of the connecting cover 51 and can be sealed tightly with the bottom of the canal. The negative pressure member 53 is connected to the shell 1 and is connected to the negative pressure chamber, which is used to form a negative pressure inside the negative pressure chamber and make the connecting cover 51 and the cylinder 11 adsorbed on the bottom of the canal. The second pressure detection member 54 is connected to the connecting cover 51 for detecting the internal pressure of the negative pressure chamber.

[0055] The connecting cover 51 is connected to the outer wall of the cylinder 11, and can form a negative pressure cavity between the outer wall of the cylinder 11 and the bottom of the canal. A negative pressure environment is formed in the negative pressure cavity through the negative pressure part 53, thereby generating a negative pressure adsorption force that can connect the connecting cover 51 and the cylinder 11 to the bottom of the canal.

[0056] In one embodiment, Figures 1 to 4 As shown, a second annular outer frame 511 is formed at the third opening of the connecting cover 51, and the second sealing member 52 is elastic. The second sealing member 52 is opposite to the second annular outer frame 511, and the second sealing member 52 is sleeved on the second annular outer frame 511 through a second annular groove and is detachably connected to the second annular outer frame 511. A stepped filtering surface is formed on the circumferential outer wall of the second sealing member 52 so that the diameter of the cross section of the second sealing member 52 gradually increases in the direction away from the cylinder 11.

[0057] The second sealing member 52 is elastic and is sleeved on the connecting cover 51 through the second annular outer frame 511 to increase airtightness.

[0058] Furthermore, a stepped filtering surface is formed on the circumferential outer wall of the second sealing member 52 , which can increase the contact area between the second sealing member 52 and the bottom of the channel and improve the airtightness of the connection.

[0059] In one embodiment, Figures 1 to 4 As shown, four balance adjustment members 55 are respectively disposed around the cylinder 11 and are detachably connected to the second annular outer frame 511 .

[0060] The four balance adjustment parts are used to facilitate the user to control the device underwater and to move the device to the check valve to be tested.

[0061] In one embodiment, Figures 1 to 4As shown, the balance adjustment member 55 includes a connecting seat 551 and a propeller 552. The four connecting seats 551 are symmetrically distributed along the center line of the mounting hole and are respectively connected to the second annular outer frame 511. The propeller 552 is arranged in a one-to-one correspondence with the connecting seat 551 and is connected to the connecting seat 551.

[0062] The reaction force generated by the propeller 552 can be used to push the device to move, and the connecting seat 551 plays a supporting role in the connection of the propeller 552.

[0063] Furthermore, the four sets of propellers 552 are evenly distributed on the outer wall of the connecting cover 51 through the connecting seat 551, ensuring that they meet the self-balancing requirements of the device and keep the center of gravity of the device stable; and the four sets of propellers 552 have built-in power supplies (not shown in the figure), which can be remotely controlled and interact with the diver to drive the detection device to the designated position, which is easy to use.

[0064] In one embodiment, Figures 1 to 4 As shown, the diameter of the cylinder 11 gradually decreases in the direction approaching the first sealing member 2 , the third annular outer frame 56 is coaxially arranged with the mounting hole and connected to the mounting hole, and the circumferential inner wall of the third annular outer frame 56 abuts against the circumferential outer wall of the cylinder 11 .

[0065] The gradually decreasing diameter and the engagement with the third annular outer frame 56 can increase the airtightness of the connection point.

[0066] Furthermore, the third annular outer frame 56 is welded to the outer wall of the cylinder 11 .

[0067] In one embodiment, Figures 1 to 4 As shown, two armrests 57 are oppositely arranged on both sides of the cylinder 11 and are respectively connected to the connecting cover 51.

[0068] The armrest 57 is connected to the outer wall of the connection cover 51 for facilitating the user to hold or transport the device. The armrest 57 is a conventional setting well known to those skilled in the art and will not be described in detail here.

[0069] In one embodiment, Figures 1 to 4As shown, the outer side of the connecting cover 51 is provided with a second annular outer frame 511 extending outward, wherein the second annular outer frame 511 is provided with a plurality of connecting through holes; the inner ring of the upper end of the second sealing member 52 is provided with a sealing connecting ring, which is adapted to the second annular outer frame 511, wherein the sealing connecting ring is provided with a plurality of positioning holes along its circumference corresponding to the connecting through holes on the second annular outer frame 511; the upper end of the second sealing member 52 is provided with a sealing ring pressure ring 521, wherein there are two sealing ring pressure rings 521 and they are respectively arranged at the upper and lower ends of the sealing connecting ring; the sealing ring pressure ring 521 is provided with a fixing hole, wherein the position and aperture of the fixing hole respectively correspond one-to-one to the positioning holes provided on the sealing connecting ring.

[0070] Furthermore, the connecting cover 51 adopts a frustum design, wherein the bottom of the connecting cover 51 is open, and a mounting hole is provided on the top of the connecting cover 51, the aperture of the mounting hole matches the outer diameter of the middle cabin section 112 of the cylinder 11, wherein the outer wall of the middle cabin section 112 is fixed to the mounting hole by welding, thereby maintaining the sealing between the cylinder 11 and the connecting cover 51; the outer side of the connecting cover 51 is provided with a second annular outer frame 511 extending outward, wherein the second annular outer frame 511 adopts a flange design, and the outer diameter of the second annular outer frame 511 is the same as the inner diameter of the second sealing member 52; the second sealing member 52 is made of rubber material, and the second sealing member 52 adopts a telescopic cover design, wherein the second The inner ring of the upper end of the second sealing member 52 is provided with a sealing connecting ring, which is adapted to the second annular outer frame 511; the second sealing member 52 is designed as a telescopic cover structure, so that the connecting cover 51 can maintain good sealing and stability when working under negative pressure; the device also includes a sealing pressure ring, and the sealing ring pressure ring 521 is a flange structure. During installation, the two sealing ring pressure rings 521 are respectively placed on the upper and lower ends of the sealing connecting ring, and then the fixing screws are passed through the fixing hole, the positioning hole and the connecting through hole in sequence, so that the sealing ring pressure ring 521, the sealing connecting ring and the second annular outer frame 511 are fixedly connected, thereby ensuring the sealing of the detection device.

[0071] In one embodiment, Figure 4 As shown, the negative pressure member 53 includes a third clamp 531, a third tapped blind plate 532, a third sealing ring, an exhaust pipe joint 534 and a first exhaust pipe 535. The lower end of the first exhaust pipe 535 passes through the connecting cover 51 and is connected to the inner cavity of the connecting cover 51, wherein the upper end of the first exhaust pipe 535 is detachably connected to the third tapped blind plate 532; an exhaust pipe joint 534 is installed above the third tapped blind plate 532, wherein the exhaust pipe joint 534 is connected to the first exhaust pipe 535; the third clamp 531 is arranged on the outside of the third tapped blind plate 532, wherein a third sealing ring is provided between the inner ring of the third clamp 531 and the third tapped blind plate 532.

[0072] Further, the third threaded blind plate 532 is fixedly connected with the first exhaust pipe 535 by using the third clamp 531, and a third sealing ring is installed between the third clamp 531 and the third threaded blind plate 532, so as to improve the sealing performance of the connection between the third threaded blind plate 532 and the first exhaust pipe 535; the exhaust pipe joint 534 can be connected with a rubber hose and connected to the air inlet end of a water pump (not shown in the figure), wherein the water pump draws water in the connection cover 51 away through the first exhaust pipe 535 and forms a negative pressure.

[0073] In one embodiment, as shown in Figure 4 The second pressure detection member 54 includes a fourth clamp 541, a fourth threaded blind plate, a fourth sealing ring, a second pressure sensor 544 and a second exhaust pipe 545, the lower end of the second exhaust pipe 545 penetrates through the connection cover 51 and communicates with the inner cavity of the connection cover 51, wherein the upper end of the second exhaust pipe 545 is detachably connected with the fourth threaded blind plate; the second pressure sensor 544 is fixedly installed above the fourth threaded blind plate, wherein the air inlet end of the second pressure sensor 544 communicates with the second exhaust pipe 545; the fourth clamp 541 is arranged outside the fourth threaded blind plate, wherein a fourth sealing ring is arranged between the inner circle of the fourth clamp 541 and the fourth threaded blind plate.

[0074] Further, the fourth threaded blind plate is fixedly connected with the second exhaust pipe 545 by using the fourth clamp 541, and a fourth sealing ring is installed between the fourth clamp 541 and the fourth threaded blind plate, so as to improve the sealing performance of the connection between the fourth threaded blind plate and the second exhaust pipe 545; the second pressure sensor 544 can monitor the pressure in the connection cover 51 in real time, if the pressure always decreases linearly, it indicates that the sealing performance and adsorption performance of the detection device are good, if the detected pressure cannot always decrease, it indicates that the detection device has a problem, and the diver needs to check the detection device.

[0075] In order to better understand the present application, the following will be combined Figures 1 to 7 The technical solutions of the present application will be described in detail:

[0076] The shell 1 is provided with a sealed cavity and a first opening connected to the sealed cavity. The first sealing member 2 is connected to the end of the first opening of the shell 1 and is used to seal against the bottom of the canal. At least one pressurizing member 3 and a first pressure detecting member 4 are connected to the shell 1, and are used to pressurize the sealed cavity or detect the pressure in the sealed cavity, respectively. The connecting assembly 5 is connected to the shell 1 and can be detachably connected to the bottom of the canal. Compared with the prior art, by placing the shell 1 into the canal and connecting the shell 1 to the bottom of the canal through the connecting assembly 5, and at the same time, by arranging the first opening of the shell 1 above the check valve and sealing against the bottom of the canal through the first sealing member 2, the check valve can be in a closed sealed cavity, and the sealed cavity is pressurized by using at least one pressurizing member 3, so that the check valve at the bottom of the canal can be effectively detected by adjusting the positive pressure in the positive sealing cavity. There is no need to place the valve bodies one by one into the detection device, and it can be adapted to the detection of the check valve at the bottom of the canal.

[0077] According to the specific working process of the present invention, at the beginning of the detection work, the staff and the detection device are in place respectively, wherein the staff drives the connecting cover 51 to start moving by controlling the balance adjustment part, and then moves the detection device to the target position; then, the negative pressure part 53 first uses the water pump to pump out the water inside the connecting cover 51 and form a negative pressure in the connecting cover 51, so that the bottom of the second sealing part 52 can be adsorbed on the underwater target position. During this process, the second pressure detection part 54 transmits the negative pressure signal of the connecting cover 51 to the onshore staff in real time. By adopting the cooperation of the negative pressure part 53 and the second pressure detection part 54, the process of forming negative pressure inside the connecting cover 51 can be carried out stably.

[0078] Furthermore, when the negative pressure is established, the pressurizing component 3 begins to deliver high-pressure gas to the inside of the cylinder 11 through the air compressor, and the pressure of the gas gradually increases from small to large until it increases to the air pressure limit required for detection; the target check valve inside the cylinder 11 begins to be subjected to gradually increasing gas pressure, and at this time the first pressure detection component 4 begins to detect the pressure changes inside the positive pressure cabin. If it is detected that the pressure in the cavity of the cylinder 11 increases to the required limit pressure and remains unchanged, it means that the functionality of the detected target check valve is intact and does not need to be replaced; if it is detected that the pressure in the cavity of the cylinder 11 suddenly changes or does not reach the required limit pressure, it means that the functionality of the check valve is damaged and needs to be replaced.

[0079] The present invention adopts a structure that combines the cylinder 11 with the connecting cover 51. The negative pressure of the connecting cover 51 allows the device to be firmly adsorbed on the bottom of the water, so that the device can adapt to the harsh working environment of rapids and deep water, and improves the stability of the detection device; by adjusting the positive pressure of the cylinder 11, the check valve at the bottom of the channel is effectively detected, and the target valve body is effectively detected, which improves the detection accuracy and simplifies the detection steps. Compared with other detection devices, it reduces the waste of manpower and material resources and greatly improves the detection efficiency.

[0080] The specific embodiments of the present invention described above do not limit the scope of protection of the present invention. Any other corresponding changes and modifications made based on the technical concept of the present invention should be included in the scope of protection of the claims of the present invention.

Claims

1. A detection device for a check valve at the bottom of a canal, characterized in that: include: A housing is formed with a sealed cavity and a first opening communicating with the sealed cavity; a first sealing member connected to an end portion of the first opening of the housing; at least one pressurizing member connected to the housing and in communication with the sealed cavity, for applying pressure to the interior of the sealed cavity; a first pressure detecting member connected to the housing and configured to detect the internal pressure of the sealed cavity; as well as a connecting assembly connected to the housing and capable of being detachably connected to the bottom of the canal; The housing includes a cylinder and a sealing cover. The cylinder is hollow and has a first opening communicating with the interior thereof formed at one end and a second opening communicating with the interior thereof formed at the other end. The cylinder is provided on the check valve via the first opening. The sealing cover is sealingly connected to the cylinder to block the second opening of the cylinder and to enclose the cylinder to form the sealed cavity. The first sealing member is connected to the cylinder and is provided around the first opening of the cylinder. In which, the connecting assembly includes a connecting cover, a second sealing member, at least one negative pressure member and a second pressure detecting member. The connecting cover is sleeved on the cylinder and connected to the cylinder, and a negative pressure cavity is formed between the inner wall of the connecting cover and the outer wall of the cylinder and the bottom of the canal. The second sealing member is connected to the connecting cover and can be sealed tightly against the bottom of the canal. The negative pressure member is connected to the shell and communicated with the negative pressure cavity, so that a negative pressure is formed inside the negative pressure cavity, and the connecting cover and the cylinder are adsorbed on the bottom of the canal. The second pressure detecting member is connected to the connecting cover for detecting the internal pressure of the negative pressure cavity.

2. The detection device for the check valve at the bottom of the canal according to claim 1, characterized in that: A first annular outer frame is formed at the second opening of the cylinder, and the sealing cover is detachably connected to the first annular outer frame. The shell also includes at least one rib plate, which is spaced apart along the circumferential direction of the cylinder and connected to the circumferential outer wall of the cylinder and the first annular outer frame.

3. The detection device for a check valve at the bottom of a canal according to claim 1, characterized in that: A first annular inner frame is formed at the first opening of the cylinder, the first seal is elastic, and a first annular inner groove is formed on the first seal relative to the first annular inner frame. The first seal is sleeved on the first annular inner frame through the first annular groove and is detachably connected to the first annular inner frame, and an arc-shaped filtering surface is formed on the circumferential outer wall of the first seal so that the diameter of the cross section of the first seal gradually decreases in the direction away from the cylinder.

4. The detection device for a check valve at the bottom of a canal according to claim 1, characterized in that: The interior of the connecting cover is hollow and has a third opening connected to the interior thereof. A second annular outer frame is formed at the third opening of the connecting cover. The second sealing member is elastic and is arranged relative to the second annular outer frame. The second sealing member is sleeved on the second annular outer frame through the second annular groove and is detachably connected to the second annular outer frame. A stepped filtering surface is formed on the circumferential outer wall of the second sealing member so that the diameter of the cross section of the second sealing member gradually increases in a direction away from the cylinder.

5. The detection device for a check valve at the bottom of a canal according to claim 4, characterized in that: The connecting assembly further comprises four balance adjustment members, which are respectively arranged on the four sides of the cylinder and are detachably connected to the second annular outer frame.

6. The detection device for a check valve at the bottom of a canal according to claim 5, characterized in that: The balance adjustment member includes a connecting seat and a propeller. The four connecting seats are distributed at intervals along the circumference of the connecting cover and are respectively connected to the second annular outer frame. The propeller is arranged in a one-to-one correspondence with the connecting seat and is connected to the connecting seat.

7. The detection device for a check valve at the bottom of a canal according to claim 1, characterized in that: The diameter of the cylinder gradually decreases in the direction approaching the first sealing member. The connecting assembly also includes a third annular outer frame, which is connected to one end of the connecting cover close to the cylinder, and the circumferential inner wall of the third annular outer frame abuts against the circumferential outer wall of the cylinder.

8. The detection device for a check valve at the bottom of a water channel according to claim 1, characterized in that: The connecting assembly further comprises two armrests, which are arranged oppositely on two sides of the cylinder and are respectively connected to the connecting cover.

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