Detection device for water channel bottom check valve

Abstract

The invention discloses a detection device for a water channel bottom check valve, which comprises a shell, a first sealing element, at least one pressurizing element, a first pressure detection element and a connecting assembly, and is characterized in that a sealing cavity and a first opening communicated with the sealing cavity are formed in the shell, the first sealing element is connected to the end part of the first opening of the shell, the pressurizing element is connected to the shell, and the first pressure detection element is connected to the connecting assembly. The shell is connected with the sealing cavity, communicates with the sealing cavity and is used for pressurizing the interior of the sealing cavity, the first pressure detection piece is connected to the shell and is used for detecting the internal pressure of the sealing cavity, and the connecting assembly is connected to the shell and can be detachably connected with the bottom of the water channel. The problem that check valves cannot be detected in the severe working environment of the bottom of a water channel due to the fact that valve bodies need to be placed into a detection device one by one can be effectively solved.

Description

Technical Field

[0001] The 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 water channels increases, various problems are inevitable in the various supporting equipment attached to the water channels. Therefore, it is necessary to carry out functional inspections on valve bodies, etc. to avoid negative effects such as a decrease in water carrying capacity in the water channels.

[0003] In order to avoid the low work efficiency caused by manual inspection, relevant inspection devices or systems have emerged. For example, the Chinese invention patent with publication number: CN113390584A is named: A valve body inspection system, including a conveying device provided with a placement station for placing the valve body, a detection device for detecting the air tightness and appearance information of the valve body on the placement station, a handling device for moving the valve body on the placement station to the target position, and a controller that is communicatively connected to the conveying device, the detection device and the handling device. The conveying device is used to drive the valve body on the placement station to move. The controller can control the action 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 action of the handling device according to the target position information. The device automates the valve body inspection process, reduces the labor intensity of the staff, and improves the work efficiency. However, the valve bodies need to be placed in the detection device one by one during the inspection, and the check valve cannot be inspected in such a harsh working environment as 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 to propose a detection device for a check valve at the bottom of a canal, so as 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: The present invention provides a detection device for a check valve at the bottom of a water channel, comprising: A housing, formed with a sealed cavity and a first opening communicating with the sealed cavity; a first sealing member connected to an end of the first opening of the housing; at least one pressurizing member, the pressurizing member being connected to the housing and communicating with the sealed cavity, and being used for pressurizing the interior of the sealed cavity; A first pressure detection member, connected to the housing, for detecting the internal pressure of the sealed cavity; and The connecting assembly is connected to the shell and can be detachably connected to the bottom of the water channel.

[0006] In some embodiments, the shell includes a cylinder and a sealing cover, the interior of the cylinder is hollow, and one end of the cylinder is formed with the first opening connected to the interior thereof, and the other end is formed with the second opening connected to the interior thereof, the cylinder is covered with a check valve through the first opening, the sealing cover is sealingly connected to the cylinder to block the second opening of the cylinder and to form the sealed cavity together with the cylinder, the first sealing member is connected to the cylinder and is arranged around the first opening of the cylinder.

[0007] In some embodiments, a first annular outer frame is formed at the second opening of the cylinder, the sealing cover is detachably connected to the first annular outer frame, and 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.

[0008] In some embodiments, 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.

[0009] In some embodiments, 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 chamber is formed between the inner wall of the connecting cover, the outer wall of the cylinder and the bottom of the water channel. The second sealing member is connected to the connecting cover and can be sealed tightly against the bottom of the water channel. The negative pressure member is connected to the shell and communicated with the negative pressure chamber to form a negative pressure inside the negative pressure chamber and to allow the connecting cover and the cylinder to be adsorbed on the bottom of the water channel. The second pressure detecting member is connected to the connecting cover to detect the internal pressure of the negative pressure chamber.

[0010] In some embodiments, 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 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, and a stepped filtering surface is formed on the circumferential outer wall of the second seal so that the diameter of the cross section of the second seal gradually increases in the direction away from the cylinder.

[0011] In some embodiments, the connection assembly further includes four balance adjustment members, which are respectively disposed around the cylinder and are detachably connected to the second annular outer frame.

[0012] In some embodiments, the balance adjustment member includes a connecting seat and a propeller, 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.

[0013] In some embodiments, the diameter of the cylinder gradually decreases in a direction approaching the first sealing member, and the connecting assembly also includes a third annular outer frame, which is connected to an 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.

[0014] In some embodiments, the connection assembly further includes two armrests, which are arranged opposite to each other on two sides of the cylinder and are respectively connected to the connection cover.

[0015] 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 used to pressurize the sealed cavity or detect the pressure in the sealed cavity, respectively, 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 in the canal and connecting the shell to the bottom of the canal through the connecting assembly, and 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 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 sealing cavity, without placing the valve bodies one by one into the detection device, and can be adapted to the detection of the check valve at the bottom of the canal. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional structural schematic diagram of a detection device for a check valve at the bottom of a water channel provided by an embodiment of the present invention; Figure 2 is a schematic diagram of a three-dimensional structure of a connection component provided in an embodiment of the present invention; Figure 3 is a schematic diagram of a three-dimensional structure of a connection component provided by an embodiment of the present invention from another perspective; Figure 4is a schematic diagram of a three-dimensional structure of a connection component provided by an embodiment of the present invention from another perspective; Figure 5 It is a schematic diagram of a three-dimensional structure in which a housing, a first sealing member, a pressurizing member and a first pressure detecting member are connected to each other according to an embodiment of the present invention; Figure 6 is a schematic diagram of a three-dimensional structure from another perspective of the connection between the housing, the first sealing member, the pressurizing member and the first pressure detecting member provided by an embodiment of the present invention; Figure 7 It is a schematic diagram of the three-dimensional structure of the first sealing member provided in an embodiment of the present invention.

[0017] Description of reference numerals: 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 16; first sealing member 2; sealing ring 21; arc-shaped transition surface 22; pressurizing member 3; first clamp 31; first tapped blind plate 32; intake pipe joint 34 first intake pipe 35; first pressure detection member 4; second clamp 41; second tapped blind plate 42; first pressure sensor 44; second intake pipe 45 ; Connecting assembly 5; Connecting cover 51; Second annular outer frame 511; Second sealing member 52; Sealing ring pressure ring 521; Negative pressure member 53; Third clamp 531; Third tapped blind plate 532; Exhaust pipe joint 534; First exhaust pipe 535; Second pressure detection member 54; Fourth clamp 541; Second pressure sensor 544; Second exhaust pipe 545; Balance adjustment member 55; Connecting seat 551; Propeller 552; Third annular outer frame 56; Handrail 57. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0019] In order to solve the technical problem that the detection of the check valve cannot be carried out in the harsh working environment of the bottom of the canal because the detection device needs to place the valve body one by one into the detection device, the present invention provides a detection device for the check valve at the bottom of the canal, which can be realized by placing a shell 1 into the canal and connecting the shell 1 to the bottom of the canal through a connecting assembly 5, and at the same time, by covering the shell 1 above the check valve and sealing it with the bottom of the canal through a first sealing member 2, so that the check valve can be in a closed sealing chamber, and the sealing chamber 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 chamber, without placing the valve body one by one into the detection device, and can be adapted to the detection of the check valve at the bottom of the canal.

[0020] See also Figures 1 to 5 , Figure 1 It is a structural schematic diagram of a detection device for a check valve at the bottom of a canal in an 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.

[0021] 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, and the connecting assembly 5 is connected to the shell 1, and can be detachably connected to the bottom of the canal.

[0022] Compared with the prior art, 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 disposed above the check valve, and the first sealing member 2 is sealed against the bottom of the canal, so that the check valve can be in a closed sealing cavity, and the sealing cavity is pressurized by 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 in the detection device, and it can be adapted to the detection of the check valve at the bottom of the canal.

[0023] Furthermore, since the check valve is arranged at the bottom of the canal, it is not convenient to take out the check valve for inspection, which is not only inconvenient to operate, but also frequent disassembly and assembly will affect the sealing effect. The present invention connects the device for inspection 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, and at the same time uses the first sealing member 2 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.

[0024] In this example, Figures 5 to 7As shown, the housing 1 includes a cylinder 11 and a sealing cover 12. The cylinder 11 is hollow inside, and a first opening connected to the inside is formed at one end thereof, and a second opening connected to the inside is formed at the other end thereof. The cylinder 11 is covered with a check valve through the first opening; the sealing cover 12 is sealedly connected to the cylinder 11, and is used to block the second opening at one end of the cylinder 11, and is used to form a sealed cavity with the cylinder 1, and 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, and enable the inside of the cylinder 11 to form a closed sealed cavity.

[0025] Furthermore, the first sealing member 2 is annular, which can increase the air tightness between the first sealing member 2 and the cylinder 11 and the bottom of the canal, thereby improving the detection effect.

[0026] In one embodiment, if 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 plate 14, which is distributed at intervals 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.

[0027] The sealing cover 12 is detachably connected to the cylinder 11 via a first annular outer frame 13 , and 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.

[0028] Furthermore, the first annular outer frame 13 and the sealing cover 12 are respectively provided with connecting through holes, and are connected with each other 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.

[0029] In one embodiment, if Figure 6 As shown, a first annular inner frame is formed at the first opening of the cylinder 11, the first sealing member 2 is elastic, 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 via 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.

[0030] The first sealing member 2 is elastic and is sleeved on the cylinder 11 through a first annular inner frame hoop, thereby increasing air tightness.

[0031] 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 water channel and improve the air tightness of the connection.

[0032] In one embodiment, if 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 of 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 arranged on the outer side of the sealing cover 12; four ribs 14 are equidistantly arranged 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 respectively.

[0033] Furthermore, the diameter of the connection between the upper cabin section 111 and the middle cabin section 112 remains the same, so that the upper cabin section 111 and the middle cabin 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, a first annular outer frame 13 is provided on the outer wall of the upper end of the upper cabin section 111 to match the first flange 16 provided on the outer side of the sealing cover 12, and the first flange 16 is fixedly connected to the first annular outer frame 13 with fixing bolts, thereby connecting the sealing cover 12 to the cylinder 11, and four ribs 14 are equidistantly provided at the connection between the first annular outer frame 13 and the upper cabin 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.

[0034] In one embodiment, if Figures 5 to 7As 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 circumferential direction 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 arranged 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.

[0035] 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 screws 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 an arc-shaped transition surface 22 is provided. 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. In one embodiment, if Figure 5 , Figure 6 As shown, the pressurizing member 3 includes a first clamp 31, a first tapped blind plate 32, a first sealing ring, an air inlet pipe joint 34 and a first air inlet pipe 35, the lower end of the first air inlet 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 inlet pipe 35 is detachably connected to the first tapped blind plate 32; an air inlet pipe joint 34 is installed above the first tapped blind plate 32, wherein the air inlet pipe joint 34 is connected to the first air inlet 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.

[0036] Furthermore, the first tapped blind plate 32 is fixedly connected to the first air inlet pipe 35 using the first clamp 31, 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.

[0037] In one embodiment, if Figure 5 , Figure 6As shown, the first pressure detecting 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 outer side 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.

[0038] Furthermore, a second clamp 41 is used to fix the second tapped blind plate 42 and 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, so as to improve the sealing of the connection between the second tapped blind plate 42 and the second air inlet pipe 45; the pressure signal inside the sealing 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.

[0039] 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 .

[0040] Among them, the interior of the connecting cover 51 is hollow, and a third opening connected to the interior is opened on one side. The connecting cover 51 also has a mounting hole connected to the 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 water channel. 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 water channel. 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 water channel. The second pressure detecting member 54 is connected to the connecting cover 51 for detecting the internal pressure of the negative pressure chamber.

[0041] 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 member 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.

[0042] In one embodiment, if Figures 1 to 4As shown, a second annular outer frame 511 is formed at the third opening of the connecting cover 51, the second sealing member 52 is elastic, the second sealing member 52 is relative to the second annular outer frame 511, 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, and 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 body 11.

[0043] The second sealing member 52 is elastic and is sleeved on the connecting cover 51 through the second annular outer frame 511 to increase air tightness.

[0044] 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 water channel and improve the air tightness of the connection.

[0045] In one embodiment, if 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 .

[0046] The four balance adjustment parts are used to facilitate the user to control the device underwater and to move the device to the non-return valve to be tested.

[0047] In one embodiment, if Figures 1 to 4 As 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 one-to-one with the connecting seat 551 and is connected to the connecting seat 551.

[0048] 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 .

[0049] 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 the device can be self-balanced so that the center of gravity of the device remains stable; and the four sets of propellers 552 all 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.

[0050] In one embodiment, if 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 .

[0051] The air tightness of the connection point can be increased by the gradually decreasing diameter and the matching engagement with the third annular outer frame 56 .

[0052] Furthermore, the third annular outer frame 56 is welded to the outer wall of the cylinder 11 .

[0053] In one embodiment, if Figures 1 to 4 As shown, two handrails 57 are arranged opposite to each other on both sides of the cylinder 11 and are respectively connected to the connecting cover 51.

[0054] The armrest 57 is connected to the outer wall of the connection cover 51 to facilitate the user to hold or transport the device. The armrest 57 here is a conventional setting known to those skilled in the art and will not be described in detail here.

[0055] In one embodiment, if Figures 1 to 4 As 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 corresponding to the connecting through holes on the second annular outer frame 511 along its circumference; the upper end of the second sealing member 52 is provided with a sealing ring pressing ring 521, wherein two sealing ring pressing rings 521 are provided and are respectively arranged at the upper and lower ends of the sealing connecting ring; the sealing ring pressing ring 521 is provided with fixing holes, wherein the positions and apertures of the fixing holes correspond one-to-one to the positioning holes provided on the sealing connecting ring.

[0056] Furthermore, the connection cover 51 adopts a truncated cone design, wherein the bottom of the connection cover 51 is open, and a mounting hole is opened on the top of the connection cover 51, and 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, so as to maintain the sealing between the cylinder 11 and the connection cover 51; the outer side of the connection 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 A sealing connecting ring is provided on the inner ring of the upper end of the second sealing member 52, and the sealing connecting ring 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 holes, the positioning holes and the connecting through holes 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.

[0057] In one embodiment, if 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 circle of the third clamp 531 and the third tapped blind plate 532.

[0058] Furthermore, a third clamp 531 is used to fix the third tapped blind plate 532 and the first exhaust pipe 535, and a third sealing ring is installed between the third clamp 531 and the third tapped blind plate 532 to improve the sealing of the connection between the third tapped blind plate 532 and the first exhaust pipe 535; the exhaust pipe joint 534 can be connected to 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 from the inside of the connecting cover 51 through the first exhaust pipe 535 and forms a negative pressure.

[0059] In one embodiment, if Figure 4As shown, the second pressure detecting component 54 includes a fourth clamp 541, a fourth tapped 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 passes through the connecting cover 51 and is connected to the inner cavity of the connecting cover 51, wherein the upper end of the second exhaust pipe 545 is detachably connected to the fourth tapped blind plate; a second pressure sensor 544 is fixedly installed above the fourth tapped blind plate, wherein the air inlet end of the second pressure sensor 544 is connected to the second exhaust pipe 545; the fourth clamp 541 is arranged on the outside of the fourth tapped blind plate, wherein a fourth sealing ring is provided between the inner circle of the fourth clamp 541 and the fourth tapped blind plate.

[0060] Furthermore, the fourth tapped blind plate is fixedly connected to the second exhaust pipe 545 using a fourth clamp 541, and a fourth sealing ring is installed between the fourth clamp 541 and the fourth tapped blind plate, thereby improving the sealing of the connection between the fourth tapped blind plate and the second exhaust pipe 545; the second pressure sensor 544 can monitor the pressure inside the connecting cover 51 in real time. If the pressure always decreases linearly, it means that the sealing and adsorption properties of the detection device are good. If the detected pressure cannot be reduced, it means that there is a problem with the detection device, and the diver needs to be reminded to check the detection device.

[0061] In order to better understand the present invention, the following Figures 1 to 7 The technical solution of the present invention is described in detail: 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 be sealed 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 component 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 component 5, and 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.

[0062] 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 connection cover 51 to start moving by controlling the balance adjustment member, and then moves the detection device to the target position; then, the negative pressure member 53 firstly pumps out the water inside the connection cover 51 through a water pump and forms a negative pressure in the connection cover 51, so that the bottom of the second sealing member 52 can be adsorbed on the underwater target position. During this process, the second pressure detection member 54 transmits the negative pressure signal of the connection cover 51 to the onshore staff in real time. By adopting the cooperation of the negative pressure member 53 and the second pressure detection member 54, the process of forming negative pressure inside the connection cover 51 can be carried out stably.

[0063] Furthermore, when the negative pressure is established, the pressurizing component 3 begins to deliver high-pressure gas to the interior 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 the detection; the target check valve inside the cylinder 11 begins to be subjected to the gradually increasing gas pressure, and at this time the first pressure detecting 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 changes suddenly or does not reach the required limit pressure, it means that the functionality of the check valve is damaged and needs to be replaced.

[0064] 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 the stability of the detection device is improved; by adjusting the positive pressure of the cylinder 11, the check valve at the bottom of the canal 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.

[0065] The specific implementation of the present invention described above does not constitute a limitation on the protection scope 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 protection scope of the claims of the present invention.

Claims

1. A detection device for a check valve at the bottom of a water channel, characterized in that: include: A housing, formed with a sealed cavity and a first opening communicating with the sealed cavity; a first sealing member connected to an end of the first opening of the housing; at least one pressurizing member, the pressurizing member being connected to the housing and communicating with the sealed cavity, and being used for pressurizing the interior of the sealed cavity; A first pressure detection member, connected to the housing, for detecting the internal pressure of the sealed cavity; as well as The connecting assembly is connected to the shell and can be detachably connected to the bottom of the water channel.

2. The detection device for the check valve at the bottom of the canal according to claim 1, characterized in that: The shell includes a cylinder and a sealing cover. The interior of the cylinder is hollow, and one end of the cylinder is formed with the first opening connected to the interior thereof, and the other end is formed with the second opening connected to the interior thereof. The cylinder is covered with a check valve through 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 sealing cavity. The first sealing member is connected to the cylinder and is arranged around the first opening of the cylinder.

3. The detection device for the check valve at the bottom of a water channel according to claim 2, 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 distributed at intervals along the circumferential direction of the cylinder and is connected to the circumferential outer wall of the cylinder and the first annular outer frame.

4. The detection device for the check valve at the bottom of a water channel according to claim 2, 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.

5. The detection device for the check valve at the bottom of a water channel according to claim 2, characterized in that: 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 chamber is formed between the inner wall of the connecting cover, the outer wall of the cylinder and the bottom of the water channel. The second sealing member is connected to the connecting cover and can be sealed tightly against the bottom of the water channel. The negative pressure member is connected to the shell and communicated with the negative pressure chamber to form a negative pressure inside the negative pressure chamber and to allow the connecting cover and the cylinder to be adsorbed on the bottom of the water channel. The second pressure detecting member is connected to the connecting cover to detect the internal pressure of the negative pressure chamber.

6. The detection device for the check valve at the bottom of the canal according to claim 5, 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 via 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 body.

7. The detection device for the check valve at the bottom of a water channel according to claim 6, characterized in that: The connecting assembly further comprises four balance adjustment members, which are respectively arranged around the cylinder and are detachably connected to the second annular outer frame.

8. The detection device for the check valve at the bottom of a water channel according to claim 7, 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.

9. The detection device for the check valve at the bottom of a water channel according to claim 5, 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.

10. The detection device for the check valve at the bottom of a water channel according to claim 5, characterized in that: The connecting assembly also includes two armrests, which are arranged oppositely on two sides of the cylinder and are respectively connected to the connecting cover.

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