CN212921889U - Plugging device suitable for leakage of liquid cargo pump flange of small LNG transport ship - Google Patents
Plugging device suitable for leakage of liquid cargo pump flange of small LNG transport ship Download PDFInfo
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- CN212921889U CN212921889U CN202120484615.1U CN202120484615U CN212921889U CN 212921889 U CN212921889 U CN 212921889U CN 202120484615 U CN202120484615 U CN 202120484615U CN 212921889 U CN212921889 U CN 212921889U
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- liquid cargo
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Abstract
The utility model belongs to the technical field of natural gas leakage plugging, and discloses a plugging device suitable for flange leakage of a liquid cargo pump of a small LNG transport ship, which comprises an injection nut arranged on a flange bolt, wherein the injection nut is connected with a pressure pump through a high-pressure pipe, and a low-temperature pressure plugging rubber rod is arranged in the pressure pump; the glue injection nut comprises a nut body provided with an internal thread hole, and the internal thread hole is not communicated at the top of the nut body but communicated at the bottom; the top of the nut body is provided with a connecting joint, and a glue injection channel communicated to the internal thread hole is arranged inside the connecting joint; the side wall of the internal thread hole is provided with at least one agent injection groove, and the agent injection groove extends from the top end of the internal thread hole to the bottom end. The utility model discloses can realize the quick shutoff of leakage under the condition of not demolising the flange, it has other components and the flange to have solved small-size LNG transport ship liquid cargo pump flange department and is not level and smooth structure completely, can't utilize anchor clamps to carry out the difficult problem of whole shutoff in the flange outside.
Description
Technical Field
The utility model belongs to the technical field of the shutoff is leaked to the natural gas, specific theory relates to a take pressure plugging device for natural gas flange leaks.
Background
With the increase of domestic LNG demand, the industry of small LNG carriers is also rapidly developing. In the operation process of the small LNG transport ship, the flange of the liquid cargo pump connected with the ship body structure bears different working conditions such as low temperature, vibration caused by the operation of the cargo pump and the like. In the long-term operation process, leakage sometimes occurs, the treatment is very complicated, and pollution is easily caused. To really solve the leakage problem, the flange sealing ring can be replaced to solve the leakage problem by emptying, inerting, ventilating, disassembling and assembling a liquid pump and the like of the liquid cargo tank, so that the operation construction cost is increased, and the normal operation of the LNG transport ship is influenced. The small LNG transport ship rents money for tens of thousands of dollars per day, and the solution according to the scheme causes great economic loss.
The Chinese patent application CN 203655211U discloses a rapid pressurized plugging device for leakage of a flange of a wellhead for oil and natural gas injection and production, wherein left connecting holes of an upper clamping plate and a lower clamping plate are connected through a pin bolt shaft; eccentric valve pin plugs are arranged at the agent injection holes of the upper clamping plate and the lower clamping plate, a pin bolt is arranged in a U-shaped groove on the right side of the upper clamping plate and serves as a fixed shaft, one end of a fastening bolt is arranged on the pin bolt, and a positioning pin of the upper clamping plate is matched and positioned with a positioning hole of the lower clamping plate; the right connecting U-shaped groove of the upper clamping plate and the right connecting U-shaped groove of the lower clamping plate are locked through butterfly nuts of the positioning and fastening bolts; metal wool sealing pieces are embedded in the sealing grooves of the upper clamping plate and the lower clamping plate, agent injection grooves are formed in the upper clamping plate and the lower clamping plate, and a sealing agent is injected into the agent injection grooves through agent injection holes of the upper clamping plate and the lower clamping plate and forms a sealing cavity with a leakage wellhead flange seam cavity; the butterfly nut of the butterfly bolt is rotated, and the butterfly bolt can rotate by an angle, so that the upper clamping plate and the lower clamping plate can be quickly separated and locked. The device can be used for plugging the leakage of the flange of the natural gas injection and production wellhead, but the use condition of the device is limited, so that the device is not suitable for plugging other components near the flange, and especially when the flange is not of a completely flat structure, the whole plugging can not be performed outside the flange by using a clamp.
SUMMERY OF THE UTILITY MODEL
The utility model discloses when aiming at solving the leakage of hazardous gas container flange, can't carry out the technical problem of whole shutoff in the flange outside, provide a plugging device who is fit for small-size LNG transport ship liquid cargo pump flange leakage, can realize the quick shutoff of leakage under the condition of not demolising the flange.
In order to solve the technical problem, the utility model discloses a following technical scheme realizes:
a plugging device suitable for leakage of a flange of a liquid cargo pump of a small LNG transport ship comprises a glue injection nut which is arranged on a flange bolt and connected with a pressure pump through a high-pressure pipe, and a low-temperature pressure leaking stoppage glue rod is arranged in the pressure pump;
the glue injection nut comprises a nut body, the nut body is provided with an internal thread hole, the internal thread hole is not communicated at the top of the nut body, but communicated at the bottom, and the internal thread hole is matched with the flange bolt;
the top of the nut body is provided with a connecting joint, an adhesive injection channel is arranged inside the connecting joint, and the adhesive injection channel is communicated to the internal threaded hole; the connecting joint is connected with the high-pressure pipe so as to enable the glue injection channel to be communicated with the pressure pump;
the side wall of the internal thread hole is provided with at least one injection groove, the injection groove extends from the top end of the internal thread hole to the bottom end, and the injection groove is communicated with the glue injection channel.
Further, the low-temperature pressurized leakage blocking glue rod can form low-temperature pressurized leakage blocking glue under the action of the pressure pump, the low-temperature pressurized leakage blocking glue is injected into the glue injection nut through the high-pressure pipe, and then the low-temperature pressurized leakage blocking glue rod is injected into the gap inside the flange along the injection agent groove to block the flange.
Further, the nut body and the connecting joint are integrally formed.
Further, the glue injection channel is arranged along the axial direction of the nut body.
Further, the central axes of the nut body, the internal thread hole, the connecting joint and the glue injection channel are collinear.
Further, the agent injection groove is concave relative to the side wall of the internal thread hole.
Furthermore, annotate the agent groove and be provided with threely, just follow internal thread hole lateral wall circumference equipartition.
Further, the agent injection groove is arranged along the axial direction of the nut body.
The utility model has the advantages that:
(one) the utility model provides a pair of be fit for plugging device of small-size LNG transport ship liquid cargo pump flange leakage carries out the area through inside to the flange leakage and presses the shutoff, and the shutoff effect is firm reliable.
(two) the utility model provides a pair of be fit for plugging device of small-size LNG transport ship liquid cargo pump flange leakage can realize the quick shutoff of leakage under the condition of not demolising the flange, need not to carry out clear cabin, inertization, ventilation and liquid cargo pump to the liquid cargo hold and demolish, has easy operation, and is quick effective, practices thrift the expense, presses advantages such as shutoff.
(III) the utility model provides a pair of be fit for plugging device that small-size LNG transport ship liquid cargo pump flange leaked has occupation space little, and the characteristics of being convenient for be under construction have solved small-size LNG transport ship liquid cargo pump flange department and have other components to and the flange is not level and smooth structure completely, can't utilize anchor clamps to carry out the difficult problem of whole shutoff in the flange outside.
Drawings
Fig. 1 is a schematic structural view of a plugging device according to an embodiment of the present invention;
fig. 2 is a schematic structural view of a glue injection nut in the plugging device according to the embodiment of the present invention;
fig. 3 is a sectional view a-a of fig. 2.
In the figure: 1. a pressure pump; 2. a high pressure pipe; 3. injecting a glue nut; 31. a nut body; 32. an internally threaded bore; 33. connecting a joint; 34. a glue injection channel; 35. an agent injection groove; 4. a flange; 5. and (4) flange bolts.
Detailed Description
For further understanding of the contents, features and effects of the present invention, the following embodiments will be exemplified in conjunction with the accompanying drawings as follows:
referring to fig. 1, fig. 1 is a schematic structural diagram of a plugging device according to an embodiment of the present invention. The embodiment discloses a plugging device that is fit for small-size LNG transport ship liquid cargo pump flange and leaks, including force (forcing) pump 1, high-pressure pipe 2, low temperature area pressure leaking stoppage glue stick and injecting glue nut 3, the injecting glue nut is used for replacing the original ordinary nut of flange bolt 5 after flange 4 connects the emergence leakage.
The low-temperature pressure leak stopping rubber rod is arranged inside the pressure pump 1, the pressure pump 1 is connected with one end of the high-pressure pipe 2, and the other end of the high-pressure pipe 2 is connected with the rubber injection nut 3.
Wherein, the pressure range of the pressure pump 1 and the high-pressure pipe 2 is required to be within 0-50MPa, and the low-temperature pressurized leakage-blocking glue is extruded into the flange by utilizing high pressure. The curing type of the low-temperature under-pressure leaking stoppage glue rod is non-curing, and the temperature application range is-163-30 degrees.
Please refer to fig. 2, fig. 2 is a schematic structural diagram of a glue injection nut in the plugging device according to an embodiment of the present invention, and fig. 3 is a sectional view of fig. 2 a-a. The compound injection nut 3 comprises a nut body 31, and the cross section of the nut body 31 has a regular hexagonal outer profile. The nut body 31 is provided with a female screw hole 32, and the female screw hole 32 does not penetrate the top of the nut body 31 but penetrates the bottom. The nut body 31 is screwed with the flange bolt 5 through an internal thread hole 32, and the size of the internal thread hole 32 is matched with the flange bolt 5.
The top outer side of the nut body 31 is provided with a connecting joint 33, and the connecting joint 33 is used for connecting with the pressure pump 1 through the high-pressure pipe 2. In a more preferred embodiment, the connection joint 33 is integrally formed with the nut body 31.
An adhesive injection channel 34 is arranged inside the connecting joint 33, one end of the adhesive injection channel 34 is communicated to the end face of the connecting joint 33, and the other end of the adhesive injection channel 34 is communicated to the internal thread hole 32. The glue injection channel 34 is arranged along the axial direction of the nut body 31; preferably, the central axes of the nut body 31, the internally threaded hole 32, the connecting joint 33 and the glue injection channel 34 are all collinear. The pressure pump 1 is connected with one end of the high-pressure pipe 2, and the connecting joint 33 is connected with the other end of the high-pressure pipe 2, so that the glue injection channel 34 is communicated with the pressure pump 1;
the side wall of the internal thread hole 32 is provided with injection grooves 35 which are uniformly distributed in the circumferential direction, and the number of the injection grooves 35 is preferably three. The injection groove 35 is recessed relative to the side wall of the internal thread hole 32 and is arranged along the axial direction of the nut body 31; the injection groove 35 extends from the top end to the bottom end of the internally threaded hole 32. The injection groove 35 is used for injecting low-temperature pressurized leakage-blocking glue into the inner gap of the flange 4.
When the liquid cargo pump flange 4 is connected and leaks, the glue injection nut 3 matched with the flange bolt 5 in size is selected, the surface of the leaked flange 4 is cleaned, torsion is applied to the flange bolt 5 according to an appointed sequence, the glue injection nut 3 is connected with the flange bolt 5, under the high-pressure action of the pressure pump 1, the low-temperature pressure leakage blocking glue rod is pressurized to the glue injection nut 3 through the pressure pump 1 and the high-pressure pipe 2, the low-temperature pressure leakage blocking glue is injected into the inner gap of the flange 4 along the three injection agent grooves 35 on the inner side of the glue injection nut 3, and the flange 4 is blocked. Therefore, the leakage is forcibly stopped, the low-temperature pressurized leakage plugging glue can maintain a certain working sealing pressure, and a firm and elastic new sealing structure is formed in a short time to achieve resealing.
The utility model discloses need not to carry out clear cabin, inertization, ventilation and liquid cargo pump to the cargo tank and demolish, have easy operation, it is quick effective, practice thrift the expense, take advantage such as area pressure shutoff. And, there are other components to small-size LNG transport ship liquid cargo pump flange department to and the flange is not the complete structure of leveling, when can't utilize anchor clamps to carry out whole shutoff outside the flange, this plugging device still is suitable for.
Although the preferred embodiments of the present invention have been described with reference to the accompanying drawings, the present invention is not limited to the above embodiments, which are only illustrative and not restrictive, and those skilled in the art can make various changes without departing from the spirit and the scope of the invention as claimed.
Claims (8)
1. The plugging device suitable for the leakage of the liquid cargo pump flange of the small LNG transport ship is characterized by comprising a glue injection nut which is arranged on a flange bolt, wherein the glue injection nut is connected with a pressure pump through a high-pressure pipe, and a low-temperature pressurized plugging rubber rod is arranged in the pressure pump;
the glue injection nut comprises a nut body, the nut body is provided with an internal thread hole, the internal thread hole is not communicated at the top of the nut body, but communicated at the bottom, and the internal thread hole is matched with the flange bolt;
the top of the nut body is provided with a connecting joint, an adhesive injection channel is arranged inside the connecting joint, and the adhesive injection channel is communicated to the internal threaded hole; the connecting joint is connected with the high-pressure pipe so as to enable the glue injection channel to be communicated with the pressure pump;
the side wall of the internal thread hole is provided with at least one injection groove, the injection groove extends from the top end of the internal thread hole to the bottom end, and the injection groove is communicated with the glue injection channel.
2. The device for plugging the flange of the liquid cargo pump of the small-sized LNG carrier according to claim 1, wherein the low-temperature pressurized plugging rubber rod can form low-temperature pressurized plugging rubber under the action of the pressure pump, the low-temperature pressurized plugging rubber rod is injected into the glue injection nut through the high-pressure pipe, and then the low-temperature pressurized plugging rubber rod is injected into the gap inside the flange along the agent injection groove to plug the flange.
3. The device for blocking the leakage of the liquid cargo pump flange of the small LNG transport ship as claimed in claim 1, wherein the nut body and the connecting joint are integrally formed.
4. The device for blocking the leakage of the liquid cargo pump flange of the small LNG transport ship is characterized in that the glue injection channel is arranged along the axial direction of the nut body.
5. The device for blocking the leakage of the liquid cargo pump flange of the small LNG transport ship is characterized in that the central axes of the nut body, the internally threaded hole, the connecting joint and the glue injection channel are collinear.
6. The device for plugging the leakage of the liquid cargo pump flange of the small LNG transport ship is characterized in that the agent injection groove is concave relative to the side wall of the internal threaded hole.
7. The device for plugging the leakage of the liquid cargo pump flange of the small LNG transport ship according to claim 1, wherein the number of the agent injection grooves is three, and the agent injection grooves are circumferentially and uniformly distributed along the side wall of the internal threaded hole.
8. The device for blocking the leakage of the liquid cargo pump flange of the small LNG transport ship is characterized in that the agent injection groove is formed in the axial direction of the nut body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120484615.1U CN212921889U (en) | 2021-03-08 | 2021-03-08 | Plugging device suitable for leakage of liquid cargo pump flange of small LNG transport ship |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120484615.1U CN212921889U (en) | 2021-03-08 | 2021-03-08 | Plugging device suitable for leakage of liquid cargo pump flange of small LNG transport ship |
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| Publication Number | Publication Date |
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| CN212921889U true CN212921889U (en) | 2021-04-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202120484615.1U Active CN212921889U (en) | 2021-03-08 | 2021-03-08 | Plugging device suitable for leakage of liquid cargo pump flange of small LNG transport ship |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114054301A (en) * | 2021-12-27 | 2022-02-18 | 南通世睿电力科技有限公司 | Construction process of acrylic acid adhesive for plugging power equipment under low-temperature condition |
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2021
- 2021-03-08 CN CN202120484615.1U patent/CN212921889U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114054301A (en) * | 2021-12-27 | 2022-02-18 | 南通世睿电力科技有限公司 | Construction process of acrylic acid adhesive for plugging power equipment under low-temperature condition |
| CN114054301B (en) * | 2021-12-27 | 2022-06-24 | 南通世睿电力科技有限公司 | Construction process of acrylic acid adhesive for plugging of power equipment under low-temperature condition |
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