Negative pressure device for pressure vessel maintenance
By improving the structure of the negative pressure device, the use of grooves and threaded connections ensures precise sealing of the gasket, solving the problem of poor sealing of flange connections and enabling safe gas discharge during pressure vessel maintenance.
Patent Information
- Application Number
- CN202423145440.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-19
- Publication Date
- 2025-11-11
- Estimated Expiration
- 2034-12-19
AI Technical Summary
When existing negative pressure devices for pressure vessel maintenance are connected to the outlet pipe via flange connections, there is a problem of inadequate sealing, leading to leakage of toxic gases.
The structure includes a pressure tank body, first and second connecting flanges, gaskets, bolts, sliders, sleeves, screws, clamps, and a blower housing. Through groove and threaded connections, it ensures precise fit of the gasket and prevents gas leakage.
It improves sealing performance and reliability, prevents toxic gas leakage, ensures the safety of workers, and reduces the possibility of poor sealing.
Smart Images
Figure CN223537164U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of pressure vessel maintenance technology, and in particular to a negative pressure device for pressure vessel maintenance. Background Technology
[0002] A pressure vessel is a sealed container that can withstand pressure. Pressure vessels have a wide range of applications and play an important role in many sectors such as industry, civil use, military industry, and scientific research.
[0003] However, in existing negative pressure devices for pressure vessel maintenance, the negative pressure device is usually connected to the gas outlet pipe of the pressure vessel through a flange connection in order to extract the gas inside the vessel. Flange connection is a common pipe connection method. Usually, two flange faces are pressed together with bolts to form a seal. However, this connection method often has the problem of poor sealing in practical applications, which leads to leakage when the negative pressure device is expelling toxic gases from the pressure vessel. Utility Model Content
[0004] The purpose of this invention is to solve the problem in the prior art where a negative pressure device is connected to the outlet pipe of a pressure vessel via a flange connection to extract gas from the vessel. This connection method often results in poor sealing in practical applications, leading to leakage when the negative pressure device is expelling toxic gases from the pressure vessel.
[0005] To achieve the above objectives, the present invention adopts the following technical solution: a negative pressure device for pressure vessel maintenance, comprising a pressure tank body, wherein a first air outlet pipe is provided on the right side of the inside of the pressure tank body, a first connecting flange is fixedly fitted on the outer surface of the right side of the first air outlet pipe, a plurality of threaded holes are provided inside the first connecting flange, an air inlet pipe is movably connected to the right side of the first connecting flange, a second connecting flange is fixedly fitted on the outer surface of the left side of the air inlet pipe, a first sealing gasket is provided on the left side of the second connecting flange, the first sealing gasket is movably connected to the right side of the first connecting flange, a plurality of bolts are threadedly connected inside the second connecting flange, and the plurality of bolts are all matched with the threaded holes, a connecting pipe is fixedly embedded on the left side of the inner wall of the air inlet pipe, and the outer surface of the connecting pipe is movably embedded inside the first air outlet pipe.
[0006] In a preferred embodiment, grooves are provided on both sides of the outer surface of the air intake pipe, and sliders are slidably connected to the inner surfaces of the two grooves.
[0007] The technical effect of adopting the above-mentioned further solution is that it allows the slider to slide through the groove.
[0008] In a preferred embodiment, sleeves are fixedly installed on the outer sides of the two sliders, and the sleeves are movably sleeved on the outer surface of the air intake pipe.
[0009] The technical effect of adopting the above-mentioned further solution is that the slider can be driven by the sleeve to move.
[0010] In a preferred embodiment, the inner wall of the sleeve is provided with a second sealing gasket, and the sleeve is internally threaded with multiple screws, each of which is fixedly mounted with a crank handle on its outer side.
[0011] The technical effect of adopting the above-mentioned further solution is that the second sealing gasket can be moved by the sleeve.
[0012] In a preferred embodiment, the inner sides of the plurality of screws are movably connected to clamping plates, and the outer sides of the plurality of clamping plates are fixedly installed with two positioning posts.
[0013] The technical effect of adopting the above-mentioned further solution is that the screw can drive the clamping plate to move.
[0014] In a preferred embodiment, the outer surfaces of the plurality of positioning posts are movably embedded inside the sleeve, a fan housing is provided on the right side of the air intake pipe, and a rotating rod is movably embedded on the right side inside the fan housing.
[0015] The technical effect of adopting the above-mentioned further solution is that the positioning column can be moved by the clamping plate.
[0016] In a preferred embodiment, a coupling is provided on the right side of the rotating rod, and a motor is provided on the right side of the coupling.
[0017] The technical effect of adopting the above-mentioned further solution is that the transmission can be transmitted to the rotating rod through a coupling.
[0018] In a preferred embodiment, a fan blade is fixedly installed on the left side of the rotating rod and inside the fan housing, and a second air outlet pipe is fixedly installed at the bottom of the fan housing.
[0019] The technical effect of adopting the above-mentioned further solution is that the rotation rod can transmit power to the fan blades.
[0020] Compared with the prior art, the advantages and positive effects of this utility model are as follows:
[0021] 1. In use, this utility model, through the setting of the sleeve and the second sealing gasket structure, allows the inner wall of the second sealing gasket to precisely fit with the connection between the first connecting flange and the first sealing gasket, which can effectively prevent the leakage of toxic gases, ensure the safety of operators, reduce the possibility of poor sealing, improve the sealing performance and reliability of the system, and solve the problem in the prior art of connecting the negative pressure device to the outlet pipe of the pressure vessel through the flange connection in order to extract the gas in the vessel. This connection method often has the problem of poor sealing in practical applications, which leads to leakage of the negative pressure device when expelling toxic gases from the pressure vessel.
[0022] 2. In use, this utility model, through the arrangement of the fan blades and the second exhaust pipe structure, can discharge toxic gases from inside the pressure tank body, preventing personnel from inhaling toxic gases and causing harm to the human body when entering the pressure tank body for maintenance. Attached Figure Description
[0023] Figure 1 A rear-view three-dimensional structural diagram of a negative pressure device for pressure vessel maintenance provided by this utility model;
[0024] Figure 2 A partial three-dimensional structural diagram of a negative pressure device for pressure vessel maintenance provided by this utility model;
[0025] Figure 3 A three-dimensional cross-sectional view of the air inlet pipe of a negative pressure device for pressure vessel maintenance provided by this utility model;
[0026] Figure 4 A three-dimensional cross-sectional view of the fan casing of a negative pressure device for pressure vessel maintenance provided by this utility model;
[0027] Figure 5 This utility model provides a three-dimensional cross-sectional view of the casing of a negative pressure device for pressure vessel maintenance.
[0028] Legend:
[0029] 1. Pressure tank body; 101. First outlet pipe; 102. First connecting flange; 103. Threaded hole; 104. Inlet pipe; 105. Second connecting flange; 106. First sealing gasket; 107. Bolt; 108. Connecting pipe; 109. Slide groove; 110. Sliding block; 111. Sleeve; 112. Second sealing gasket; 113. Screw; 114. Handle; 115. Clamping plate; 116. Positioning column; 2. Fan housing; 201. Rotating rod; 202. Coupling; 203. Motor; 204. Fan blade; 205. Second outlet pipe. Detailed Implementation
[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0031] Example 1, please refer to Figures 1 to 5 This utility model provides a technical solution: a negative pressure device for pressure vessel maintenance, including a pressure tank body 1. A first air outlet pipe 101 is provided on the right side of the pressure tank body 1. A first connecting flange 102 is fixedly fitted on the outer right side of the first air outlet pipe 101. Multiple threaded holes 103 are provided inside the first connecting flange 102. An air inlet pipe 104 is movably connected to the right side of the first connecting flange 102. A second connecting flange 105 is fixedly fitted on the outer left side of the air inlet pipe 104. A first sealing gasket 106 is provided on the left side of the second connecting flange 105. The first sealing gasket 106 is movably connected to the right side of the first connecting flange 102. Multiple bolts 107 are threadedly connected inside the second connecting flange 105, and all bolts 107 are connected to the threaded holes 103. 3. Matching, a connecting pipe 108 is fixedly embedded on the left side of the inner wall of the intake pipe 104. The outer surface of the connecting pipe 108 is movably embedded inside the first exhaust pipe 101. Slide grooves 109 are opened on both sides of the outer surface of the intake pipe 104. Slider 110 is slidably connected to the inner surface of the two slide grooves 109. Sleeves 111 are fixedly installed on the outer side of the two sliders 110. Sleeves 111 are movably sleeved on the outer surface of the intake pipe 104. A second sealing gasket 112 is provided on the inner wall of the sleeve 111. Multiple screws 113 are threadedly connected to the inside of the sleeve 111. A crank handle 114 is fixedly installed on the outer side of the multiple screws 113. Clamping plates 115 are movably connected to the inner side of the multiple screws 113. Two positioning pins 116 are fixedly installed on the outer side of the multiple clamping plates 115.
[0032] In this embodiment, the operator first places the device on the right side of the pressure tank body 1 and pushes it to the left, causing the connecting pipe 108 inside the air inlet pipe 104 to embed into the first air outlet pipe 101 in the pressure tank body 1. The operator then continues to push the device, causing the first sealing gasket 106 on the second connecting flange 105 to adhere to the right side of the first connecting flange 102. The operator then rotates the bolt 107 to insert it into the threaded hole 103, thus initially fixing the device to the pressure tank body 1. Next, the operator pushes the sleeve 111 to the left, causing the slider 110 to slide to the left through the slide groove 109. The sleeve 111 then drives the second sealing gasket 112 to move synchronously. After the sleeve 111 slides to a certain extent, the inner wall of the second sealing gasket 112 will adhere to the first connecting flange 102 and the first sealing gasket... At the connection between gasket 106 and the second connecting flange 105, personnel turn the crank handle 114 to drive the screw 113 to rotate. When the screw 113 rotates, it pushes the clamping plate 115 inward, and the clamping plate 115 pulls the positioning pin 116 to slide inside the sleeve 111. After the clamping plate 115 moves to a certain extent, it will fit against the outer surface of the first air outlet pipe 101 and the air inlet pipe 104, thereby fixing the sleeve 111. Through the structure of the sleeve 111 and the second sealing gasket 112, the inner wall of the second sealing gasket 112 can accurately fit against the connection between the first connecting flange 102 and the first sealing gasket 106, which can effectively prevent the leakage of toxic gases, ensure the safety of operators, reduce the possibility of poor sealing, and improve the sealing performance and reliability of the system.
[0033] Example 2, as Figures 1 to 5 As shown, the outer surfaces of multiple positioning posts 116 are movably embedded inside the sleeve 111. A fan housing 2 is provided on the right side of the air inlet pipe 104. A rotating rod 201 is movably embedded on the right side of the inside of the fan housing 2. A coupling 202 is provided on the right side of the rotating rod 201. A motor 203 is provided on the right side of the coupling 202. A fan blade 204 is fixedly installed on the left side of the rotating rod 201 and inside the fan housing 2. A second air outlet pipe 205 is fixedly installed at the bottom of the fan housing 2.
[0034] In this embodiment, after the device is connected to the pressure tank body 1, personnel can first inject some inert gas into the pressure tank body 1. Then, through the power supply system of the motor 203, the motor 203 is started, so that when it is running, it can be driven to the rotating rod 201 through the coupling 202. The rotating rod 201 then drives the fan blade 204 to rotate to form a negative pressure. At this time, the harmful gas in the pressure tank body 1 is extracted through the first exhaust pipe 101 and the intake pipe 104 and enters the interior of the fan housing 2. Then, the harmful gas is discharged to the designated location through the second exhaust pipe 205. The structure of the fan blade 204 and the second exhaust pipe 205 can discharge the toxic gas inside the pressure tank body 1, preventing personnel from inhaling toxic gas and causing harm to the human body when entering the pressure tank body 1 for maintenance.
[0035] Working principle: In use, the operator first places the device on the right side of the pressure tank body 1 and pushes it to the left, so that the connecting pipe 108 inside the air inlet pipe 104 is embedded in the first air outlet pipe 101 in the pressure tank body 1. Then, the operator continues to push the device, so that the first sealing gasket 106 on the second connecting flange 105 fits against the right side of the first connecting flange 102. The operator then rotates the bolt 107 to embed it into the threaded hole 103, thus initially fixing the device to the pressure tank body 1. Then, the operator pushes the sleeve 111 to the left, causing the slider 110 to slide to the left through the slide groove 109. The sleeve 111 drives the second sealing gasket 112 to move synchronously. After the sleeve 111 slides to a certain extent, the inner wall of the second sealing gasket 112 will fit against the first connecting flange 102 and the first... At the connection between the sealing gasket 106 and the second connecting flange 105, the operator rotates the crank handle 114 to drive the screw 113 to rotate. When the screw 113 rotates, it pushes the clamping plate 115 inward, and the clamping plate 115 pulls the positioning pin 116 to slide inside the sleeve 111. After the clamping plate 115 moves to a certain extent, it will fit against the outer surface of the first air outlet pipe 101 and the air inlet pipe 104, thereby fixing the sleeve 111. Through the structure of the sleeve 111 and the second sealing gasket 112, the inner wall of the second sealing gasket 112 can accurately fit against the connection between the first connecting flange 102 and the first sealing gasket 106, which can effectively prevent the leakage of toxic gases, ensure the safety of the operators, reduce the possibility of poor sealing, and improve the sealing performance and reliability of the system. In use, after the device is connected to the pressure tank body 1, personnel can first inject some inert gas into the pressure tank body 1. Then, through the power supply system of the motor 203, the motor 203 is started, so that when it is running, it can be driven to the rotating rod 201 through the coupling 202. The rotating rod 201 then drives the fan blade 204 to rotate, so as to form a negative pressure. At this time, the harmful gas in the pressure tank body 1 is extracted through the first exhaust pipe 101 and the intake pipe 104 and enters the interior of the fan casing 2. Then, the harmful gas is discharged to the designated location through the second exhaust pipe 205. The structure of the fan blade 204 and the second exhaust pipe 205 can discharge the toxic gas inside the pressure tank body 1, preventing personnel from inhaling toxic gas and causing harm to the human body when entering the pressure tank body 1 for maintenance.
[0036] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the present utility model.
Claims
1. A negative pressure device for pressure vessel maintenance, comprising a pressure tank body (1), characterized in that: The pressure tank body (1) has a first air outlet pipe (101) on its right side. A first connecting flange (102) is fixedly fitted on the right outer surface of the first air outlet pipe (101). The first connecting flange (102) has multiple threaded holes (103) inside. An air inlet pipe (104) is movably connected to the right side of the first connecting flange (102). A second connecting flange (105) is fixedly fitted on the left outer surface of the air inlet pipe (104). A first sealing gasket (106) is provided on the left side of the second connecting flange (105). The first sealing gasket (106) is movably connected to the right side of the first connecting flange (102). Multiple bolts (107) are threadedly connected inside the second connecting flange (105). All of the bolts (107) match the threaded holes (103). A connecting pipe (108) is fixedly embedded on the left side of the inner wall of the air inlet pipe (104). The outer surface of the connecting pipe (108) is movably embedded inside the first air outlet pipe (101).
2. The negative pressure device for pressure vessel maintenance according to claim 1, characterized in that: The air intake pipe (104) has grooves (109) on both sides of its outer surface, and sliders (110) are slidably connected to the inner surfaces of the two grooves (109).
3. A negative pressure device for pressure vessel maintenance according to claim 2, characterized in that: A sleeve (111) is fixedly installed on the outside of the two sliders (110), and the sleeve (111) is movably sleeved on the outer surface of the air intake pipe (104).
4. A negative pressure device for pressure vessel maintenance according to claim 3, characterized in that: The inner wall of the sleeve (111) is provided with a second sealing gasket (112), and the sleeve (111) is internally threaded with a plurality of screws (113), and a crank handle (114) is fixedly installed on the outer side of each of the plurality of screws (113).
5. A negative pressure device for pressure vessel maintenance according to claim 4, characterized in that: Each of the screws (113) has a clamping plate (115) movably connected to its inner side, and two positioning posts (116) are fixedly installed on the outer side of each of the clamping plates (115).
6. A negative pressure device for pressure vessel maintenance according to claim 5, characterized in that: The outer surfaces of the multiple positioning posts (116) are movably embedded inside the sleeve (111). A fan housing (2) is provided on the right side of the air intake pipe (104), and a rotating rod (201) is movably embedded on the right side of the inside of the fan housing (2).
7. A negative pressure device for pressure vessel maintenance according to claim 6, characterized in that: A coupling (202) is provided on the right side of the rotating rod (201), and a motor (203) is provided on the right side of the coupling (202).
8. A negative pressure device for pressure vessel maintenance according to claim 7, characterized in that: A fan blade (204) is fixedly installed on the left side of the rotating rod (201) and inside the fan housing (2), and a second air outlet pipe (205) is fixedly installed at the bottom of the fan housing (2).