CN212567838U - Device for checking air tightness of tube bundle of floating head heat exchanger - Google Patents
Device for checking air tightness of tube bundle of floating head heat exchanger Download PDFInfo
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- CN212567838U CN212567838U CN202021071321.8U CN202021071321U CN212567838U CN 212567838 U CN212567838 U CN 212567838U CN 202021071321 U CN202021071321 U CN 202021071321U CN 212567838 U CN212567838 U CN 212567838U
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Abstract
The utility model discloses a device for examining floating head heat exchanger tube bank gas tightness. The device comprises a tube bundle connecting part, a pressure increasing part and a pressure relief part; the tube bundle connecting part comprises a port connecting part which is abutted with the tube plate; the surface of the port connecting part, which is close to the tube plate, is provided with a groove, the groove and the tube plate form a cavity, and the cavity is used for accommodating a port of the U-shaped heat exchange tube; the port connecting part is provided with a pressurization port and a pressure relief port; the pressurizing part is connected with the pressurizing port and is used for supplying water and gas to the cavity and the U-shaped heat exchange tube; the pressurizing part comprises a water pressure control component which is used for controlling the conduction and the cut-off of the pressurizing port and the outside; the pressure relief part is connected with the pressure relief opening and used for discharging water and gas in the cavity and the U-shaped heat exchange tube; the pressure relief portion comprises a drainage control component which is used for controlling the conduction and the cut-off of the pressure relief opening and the outside. The device is convenient to assemble and disassemble and can accurately find the position of water vapor leakage.
Description
Technical Field
The utility model relates to a device for examining floating head heat exchanger tube bank gas tightness.
Background
The tube bundle is an important component of the floating head heat exchanger and mainly comprises a plurality of U-shaped heat exchange tubes and tube plates. The two ends of the U-shaped heat exchange tube penetrate through the tube plate, the U-shaped heat exchange tube is connected with the tube plate in a connection mode of strength welding and expansion pasting, and the two ends of the U-shaped heat exchange tube are extended out of the tube plate by about 2 mm. The water pressure air tightness detection needs to be carried out on the tube bundle after the tube plate and the U-shaped heat exchange tube are assembled and welded, however, the number of ports of the U-shaped heat exchange tube extending out of the tube plate is large, if an integral barrel pressing mode is adopted for detection, tube boxes on two sides of the tube plate and the barrel are required to be sealed in a flange connection mode, pressing is carried out after an integral structure is formed, and the barrel, the tube boxes and connected flanges need to be detached after pressing. The method has the advantages of high assembly and disassembly difficulty, complex detection process, incapability of observing the condition of tube bundle leakage during pressing, incapability of judging the specific position of leakage once leakage occurs, and increase of the manufacturing period and the repair difficulty.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model provides a device for examining floating head heat exchanger tube bank gas tightness, the device loading and unloading are convenient, can accurate discovery steam leak the position.
The utility model provides a device for checking the air tightness of a tube bundle of a floating head heat exchanger, which comprises a tube bundle connecting part, a pressurizing part and a pressure relief part;
the tube bundle connecting part comprises a port connecting part which is abutted against a tube plate of the floating head type heat exchanger tube bundle; the surface of the port connecting component, which is close to the tube plate, is provided with a groove, the groove and the tube plate form a cavity, and the cavity is used for accommodating a port of the U-shaped heat exchange tube; the port connecting part is provided with a pressurization port and a pressure relief port;
the pressurizing part is connected with the pressurizing port and is used for supplying water and gas to the cavity and the U-shaped heat exchange tube; the pressurizing part comprises a water pressure control component which is used for controlling the conduction and the cut-off of the pressurizing port and the outside;
the pressure relief part is connected with the pressure relief opening and used for discharging water and gas in the cavity and the U-shaped heat exchange tube; the pressure relief part comprises a drainage control component which is used for controlling the conduction and the cut-off of the pressure relief opening and the outside;
when the water pressure control part and the drainage control part are both in a cut-off state, the cavity is isolated from the outside.
The tube bundle connecting part of the utility model can comprise a port connecting part. In some embodiments, the tube bundle connection portion may further include an "L" bolt, a lifting lug, and/or a gasket.
According to the device of the present invention, preferably, the tube bundle connecting portion further includes an "L" -shaped bolt, an end portion of a transverse portion of the "L" -shaped bolt is provided with a bent portion, and an end surface of the bent portion is a horizontal plane;
the port connecting part is provided with a hole matched with the L-shaped bolt, the end face of the elbow part of the L-shaped bolt is abutted to the face, far away from the port connecting part, of the tube plate, the L-shaped bolt extends out of the hole of the port connecting part, and the L-shaped bolt is connected with the port connecting part in a bolt fixing mode.
The sealing gasket can be arranged between the port connecting component and the tube plate of the floating head type heat exchanger tube bundle; preferably an "O" type gasket. Therefore, the joint between the port connecting part and the tube plate is tighter, and the air tightness of the device is ensured. The port connection member may be provided with a hole to be matched with the "L" type bolt. Can adopt threaded connection's mode to make "L" type bolt link to each other with port adapting unit like this to make the laminating between port adapting unit and the tube sheet of floating head heat exchanger tube bank inseparabler, ensure the gas tightness of device. The port connecting member is provided with a pressurizing port for supplying water and gas to the cavity and the U-shaped heat exchange tube. The port connecting part is provided with a pressure relief port for discharging water and gas in the cavity and the U-shaped heat exchange tube. The utility model discloses a port adapting unit is last can also be provided with the lug. This facilitates handling. The port connection member may be a flange cover.
The "L" shaped bolt is used to abut the port connecting member and the tube sheet. The end part of the transverse part of the L-shaped bolt is provided with a bent part, and the end surface of the bent part is a horizontal plane; the port connecting part is provided with a hole matched with the L-shaped bolt, the end face of the elbow part of the L-shaped bolt is abutted against the tube plate, the L-shaped bolt extends out of the hole of the port connecting part, and the L-shaped bolt is connected with the port connecting part in a bolt fixing mode. Thus, the L-shaped bolt is fastened through the nut, so that the port connecting component and the tube plate can be tightly pressed. A sealing gasket is arranged between the end surface of the elbow part of the L-shaped bolt and the tube plate; preferably an "O" type gasket. This can increase the airtightness of the device.
The utility model discloses a tube bank connecting portion still includes sealed the pad, sealed pad is "O" type structure, sealed pad sets up the terminal surface of the elbow portion of "L" type bolt with between the tube sheet and/or port adapting unit with between the tube sheet. According to the device of the present invention, preferably, the tube bundle connecting portion further comprises a sealing gasket, and the sealing gasket is of an O-shaped structure; the sealing gasket is arranged between the end surface of the elbow part of the L-shaped bolt and the tube plate; and the gasket is disposed between the port connection member and the tube sheet.
According to the utility model discloses a device, preferably, port connecting part is the blind flange, port connecting part is provided with the lug.
The utility model discloses a pressure boost portion includes the water pressure control part. In some embodiments, the plenum may also include a water inlet pipe and/or a pressure measurement component.
The utility model discloses a water pressure control part is used for controlling switching on and ending of pressure boost mouth and external world. In some embodiments, the water pressure control component is connected to the water inlet pipe. According to the utility model discloses an embodiment, water pressure control part passes through the connecting pipe and links to each other with the inlet tube. The water pressure control member may be provided in a double-ended flange ball valve configuration. The water pressure control component is connected with other structures in a flange connection mode, and the conduction and the cut-off of the pressurization port and the outside are controlled by controlling the position of the ball valve.
One end of the water inlet pipe is connected with the pressurizing port, the other end of the water inlet pipe is connected with the water pressure control component, and the water pressure control component is used for supplying water and gas to the cavity and the U-shaped heat exchange pipe. The water inlet pipe may be connected to the water pressure control part through a connection pipe. According to the utility model discloses an embodiment, the inlet tube inserts the pressure boost mouth to adopt the flange and the welded mode links to each other with the pressure boost mouth. The water inlet pipe is connected with the water pressure control part in a flange connection mode. This ensures the air tightness of the device.
The pressure measuring component is used for detecting pressure change and is arranged on a pipeline between the water pressure control component and the pressurization port. According to the utility model discloses an embodiment, the pressure measurement part sets up on the connecting pipe between water pressure control part and inlet tube. The test component may be a pressure gauge.
According to the device of the present invention, preferably, the pressurizing part further comprises a water inlet pipe and a pressure measuring component;
one end of the water inlet pipe is connected with the pressurizing port, the other end of the water inlet pipe is connected with the water pressure control part, and the water pressure control part is used for supplying water and gas to the cavity and the U-shaped heat exchange pipe;
the pressure measuring component is arranged on a pipeline between the water pressure control component and the pressurization port and used for detecting pressure change.
The utility model discloses a relief portion includes drainage control part. In certain embodiments, the relief portion may also include a drain and/or an elbow.
According to the utility model discloses a device, preferably, the inlet tube with water pressure control part adopts flange joint's mode to link to each other.
According to the utility model discloses a device, preferably, the water pressure control part sets up to double-end flange ball valve structure.
The drainage control component is used for controlling the conduction and the cut-off of the pressurization port and the outside. The drain control member may be connected to a drain pipe. According to an embodiment of the present invention, the drain control member is connected to the drain pipe through an elbow. The drain control member may be connected to other structures by way of a threaded connection. The drain control member may be provided in a ball valve structure. The conduction and the cut-off of the pressure relief opening and the outside are controlled by controlling the position of the ball valve.
According to the device of the present invention, preferably, the pressure relief portion further comprises a drain pipe, one end of the drain pipe is connected to the pressure relief opening, and the other end of the drain pipe is connected to the drainage control component; the water discharge pipe is used for discharging water and gas of the cavity and the U-shaped heat exchange pipe.
According to the utility model discloses a device, preferably, the relief pressure portion still includes the elbow, the drain pipe with the drainage control part passes through the elbow and links to each other.
According to the utility model discloses a device, preferably, drainage control part sets up to the ball valve structure.
The water discharge pipe is used for discharging water and gas in the cavity and the U-shaped heat exchange pipe. One end of the drain pipe is connected with the pressure relief port, and the other end of the drain pipe is connected with the drainage control component. According to the utility model discloses an embodiment, the one end of drain pipe links to each other with the pressure release mouth, and the other end of drain pipe passes through the elbow and links to each other with drainage control part. The drain pipe can be connected with the pressure relief opening in a welding mode. The other end of the drain pipe can be connected with the elbow or the drain control component in a threaded connection mode.
According to the utility model discloses an embodiment for the device of inspection floating head heat exchanger tube bank gas tightness includes tube bank connecting portion, pressurization portion and pressure relief portion. The tube bundle connecting part comprises a port connecting part, an L-shaped bolt, a sealing gasket and a lifting lug. The pressure increasing part comprises a water inlet pipe, a pressure measuring component and a water pressure control component. The pressure relief portion includes a drain pipe, an elbow, and a drain control member.
The port connection member is a flange cover. The surface of the port connecting component, which is close to the tube plate, is provided with a groove, the port connecting component is abutted against the tube plate through an L-shaped bolt, the groove and the tube plate form a cavity, and the cavity is used for accommodating a port of the U-shaped heat exchange tube.
The end part of the transverse part of the L-shaped bolt is provided with a bent part, and the end surface of the bent part is a horizontal plane. The port connecting component is provided with a hole matched with the L-shaped bolt. The end face of the elbow part of the L-shaped bolt is abutted against the face, far away from the port connecting part, of the tube plate, the L-shaped bolt extends out of the hole of the port connecting part, and the L-shaped bolt is connected with the port connecting part in a bolt fixing mode, so that the port connecting part is tightly pressed with the tube plate. The L-shaped bolts are arranged in a plurality.
And a sealing gasket is arranged between the port connecting component and the tube plate. And a sealing gasket is arranged between the end surface of the elbow part of the L-shaped bolt and the tube plate. The sealing gasket is an O-shaped sealing gasket. The port connection member is provided with a lifting lug. The port connecting part is also provided with a pressurization port and a pressure relief port.
The water inlet pipe is used for supplying water and gas to the cavity and the U-shaped heat exchange pipe, one end of the water inlet pipe is connected with the pressurizing port, and the other end of the water inlet pipe is connected with the water pressure control component. The water pressure control component is used for controlling the water inlet to be communicated or cut off with the outside and is of a double-end flange ball valve structure. The pressure measuring component is arranged on a pipeline between the water inlet and the water pressure control component.
The water discharge pipe is used for discharging water and gas in the cavity and the U-shaped heat exchange pipe, one end of the water discharge pipe is connected with the water discharge port, and the other end of the water discharge pipe is connected with the elbow. The other end of the elbow is connected with the drainage control component. The drainage control component is used for controlling the conduction and the cut-off of the pressure relief opening and the outside and is of a ball valve structure.
The device of the utility model has the advantages of safe and reliable structure, convenient disassembly and good sealing performance. The device has realized the detection of floating head heat exchanger tube bank gas tightness fast, can observe the overall process that the gas tightness detected directly perceivedly, can discover the specific position that steam leaked accurately.
Drawings
Fig. 1 is a schematic structural diagram of a floating head heat exchanger tube bundle.
Fig. 2 is a schematic structural diagram of the device for checking the air tightness of the floating head heat exchanger tube bundle of the present invention.
Fig. 3 is a usage state diagram of the device for checking the air tightness of the floating head heat exchanger tube bundle of the present invention.
Fig. 4 is a top view of the device for checking the air tightness of the floating head heat exchanger tube bundle of the present invention.
Fig. 5 is a partially enlarged view of the state of use of the portion I.
The reference numerals are explained in detail as follows:
1-a tube bundle connection; 2-a pressurization part; 3-a pressure relief portion; 4-a tube plate; 5-U-shaped heat exchange tubes; 11-port connection member; 12- "L" type bolt; 13-a gasket; 14-a lifting lug; 15-a groove; 21-water inlet pipe; 22-a pressure measuring cell; 23-a water pressure control component; 31-a drain pipe; 32-bend; 33-drainage control means.
Detailed Description
Example 1
The utility model discloses a device for examining floating head heat exchanger tube bank gas tightness is shown in fig. 2-5, and it includes tube bank connecting portion 1, pressure boost portion 2 and relief portion 3. The tube bundle connecting part 1 includes a port connecting part 11, an "L" bolt 12, a packing 13, and a lifting lug 14. The pressurizing section 2 includes a water inlet pipe 21, a pressure measuring unit 22, and a water pressure control unit 23. The pressure relief portion 3 includes a drain pipe 31, an elbow 32, and a drain control member 33.
The port connecting member 11 of the present embodiment is a flange cover. The surface of the port connecting component 11 close to the tube plate 4 is provided with a groove 15, the port connecting component 11 is abutted against the tube plate 4 through an L-shaped bolt 12, and the groove 15 and the tube plate 4 form a cavity for accommodating a port of the U-shaped heat exchange tube 5.
The end of the transverse part of the L-shaped bolt 12 is provided with a bent part, and the end surface of the bent part is a horizontal plane. The port connection member 11 is provided with a hole matching the "L" bolt 12. The end face of the elbow portion of the L-shaped bolt 12 abuts against the face of the tube sheet 4 away from the port connection member, the L-shaped bolt 12 extends out of the hole of the port connection member 11, and the L-shaped bolt 12 is connected with the port connection member 11 in a bolt fixing manner, so that the port connection member 11 is tightly pressed with the tube sheet 4. The "L" shaped bolt 12 is provided in plurality.
The water inlet pipe 21 is inserted into the pressurizing port and connected thereto by means of flange and welding, and serves to supply water and gas to the chamber and the U-shaped heat exchange pipe 5. The other end of the water inlet pipe 21 is connected with the water pressure control part 23 by a flange connection through a connecting pipe. The water pressure control component 23 is used for controlling the conduction and the cut-off of the pressurization port and the outside, and is arranged in a double-end flange ball valve structure. The pressure measuring unit 22 is a pressure gauge, which is in communication with the connection pipe.
The drain pipe 31 is connected to a pressure relief port by welding, and is used for discharging water and gas in the chamber and the U-shaped heat exchange pipe. The other end of the drain pipe 31 is connected to the elbow 32 by means of a screw connection. The other end of the elbow 32 is connected with a drainage control part 33 in a threaded connection mode, and the drainage control part 33 is used for controlling the conduction and the stop of the pressure relief opening and the outside. The drain control part 33 is provided in a ball valve structure.
When in use, the sealing gasket 13 is placed at the position corresponding to the tube plate 4, and the lifting lug 14 is used for lifting the device of the embodiment 1 to the position of the tube plate 4. The end face of the elbow portion of the L-shaped bolt 12 is abutted against the tube plate 4, the L-shaped bolt 12 is inserted into the hole provided in the port connecting member 11, and the L-shaped bolt 12 is fastened by a nut, thereby ensuring that the port connecting member 11 is tightly pressed against the tube plate 4. The external water pressure device is connected to the water pressure control unit 23, the water pressure control unit 23 is opened to communicate the pressurizing port, the drain control unit 33 is opened to communicate the pressure relief port, and water injection is started. When the water discharge pipe 31 starts to overflow, the water injection is completed, the water discharge control member 33 is closed, and the pressurization is started. When the pressure rises to the test required pressure, the water pressure control unit 23 is closed and pressure holding is started. And checking whether the pipe bundle has water seepage phenomenon in the pressure maintaining process. After the test is finished, the drainage control part 33 is opened to drain water, and after the water is drained completely, the L-shaped bolt 12 is loosened, so that the device of the embodiment 1 can be taken down.
The present invention is not limited to the above embodiments, and any variations, modifications, and substitutions that may occur to those skilled in the art may be made without departing from the spirit of the present invention.
Claims (5)
1. A device for detecting the air tightness of a tube bundle of a floating head heat exchanger is characterized by comprising a tube bundle connecting part, a pressurization part and a relief part;
the tube bundle connecting part comprises a port connecting part which is abutted against a tube plate of the floating head type heat exchanger tube bundle; the surface of the port connecting component, which is close to the tube plate, is provided with a groove, the groove and the tube plate form a cavity, and the cavity is used for accommodating a port of the U-shaped heat exchange tube; the port connecting part is provided with a pressurization port and a pressure relief port;
the pressurizing part is connected with the pressurizing port and is used for supplying water and gas to the cavity and the U-shaped heat exchange tube; the pressurizing part comprises a water pressure control component which is used for controlling the conduction and the cut-off of the pressurizing port and the outside;
the pressure relief part is connected with the pressure relief opening and used for discharging water and gas in the cavity and the U-shaped heat exchange tube; the pressure relief part comprises a drainage control component which is used for controlling the conduction and the cut-off of the pressure relief opening and the outside;
when the water pressure control part and the drainage control part are both in a cut-off state, the cavity is isolated from the outside;
the tube bundle connecting part also comprises an L-shaped bolt, the end part of the transverse part of the L-shaped bolt is provided with a bent part, and the end surface of the bent part is a horizontal plane; the port connecting part is provided with a hole matched with the L-shaped bolt, the end surface of the elbow part of the L-shaped bolt is abutted against the surface of the tube plate, which is far away from the port connecting part, the L-shaped bolt penetrates into the hole arranged on the port connecting part, and the L-shaped bolt is fastened by a nut, so that the port connecting part is tightly pressed with the tube plate;
the tube bundle connecting part also comprises a sealing gasket which is in an O-shaped structure; the sealing gasket is arranged between the end surface of the elbow part of the L-shaped bolt and the tube plate; and the gasket is disposed between the port connection member and the tube sheet;
the pressure increasing part also comprises a water inlet pipe and a pressure measuring component; one end of the water inlet pipe is connected with the pressurizing port, the other end of the water inlet pipe is connected with the water pressure control part, and the water pressure control part is used for supplying water and gas to the cavity and the U-shaped heat exchange pipe; the pressure measuring component is arranged on a pipeline between the water pressure control component and the pressurization port and used for detecting pressure change; the water inlet pipe is connected with the water pressure control part in a flange connection mode; the water pressure control component is of a double-end flange ball valve structure.
2. The apparatus of claim 1, wherein the port connection member is a flange cover, the port connection member being provided with a lifting lug.
3. The apparatus of claim 1, wherein the pressure relief portion further comprises a drain tube, one end of the drain tube being connected to the pressure relief port, the other end of the drain tube being connected to the drain control member; the water discharge pipe is used for discharging water and gas of the cavity and the U-shaped heat exchange pipe.
4. The apparatus of claim 3, wherein the pressure relief portion further comprises an elbow, and the drain tube is connected to the drain control member by the elbow.
5. The apparatus of claim 1, wherein the drain control member is provided in a ball valve configuration.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021071321.8U CN212567838U (en) | 2020-06-11 | 2020-06-11 | Device for checking air tightness of tube bundle of floating head heat exchanger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021071321.8U CN212567838U (en) | 2020-06-11 | 2020-06-11 | Device for checking air tightness of tube bundle of floating head heat exchanger |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212567838U true CN212567838U (en) | 2021-02-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021071321.8U Active CN212567838U (en) | 2020-06-11 | 2020-06-11 | Device for checking air tightness of tube bundle of floating head heat exchanger |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212567838U (en) |
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2020
- 2020-06-11 CN CN202021071321.8U patent/CN212567838U/en active Active
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