Radioactive source emission module and preassembling system of underwater caisson oil and gas leakage detection system

Abstract

The utility model discloses a radioactive source emission module of an underwater caisson oil gas leakage detection system, which comprises an emission end base, a radioactive source assembly is arranged on the emission end base, and the radioactive source assembly is provided with a ray emission window; a shielding cover and a shielding switch are arranged on the transmitting end base, the shielding cover is matched with the ray transmitting window, and the shielding cover is connected with the shielding switch through a linkage mechanism; and the shielding cover is linked with the shielding switch to open or close the ray emission window. The beneficial effects of the utility model are that the radioactive source emission module can be rapidly configured at the top of the underwater caisson, and the shielding switch and the shielding cover can be rapidly linked to open or close the shielding cover, thereby providing guarantee for the safe disposal construction of divers.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of petroleum engineering, concretely relates to an underwater oil and gas recovery monitoring device. BACKGROUND

[0002] The underwater caisson is a new type of structure suitable for shallow water underwater production system. The underwater caisson is inverted on the water bottom, and various facilities of the underwater production system, such as the Christmas tree, the control system, and the metering system, are installed inside. In the process of oil and gas recovery, various instruments, valves, and facilities, as well as pipelines connecting the instruments, valves, and facilities, may leak oil and gas, which will affect production and cause environmental crisis. Therefore, timely mastering the oil and gas leakage situation has important reference value for the platform to make quick decisions and take measures.

[0003] Earlier, oil and gas traders used point-to-point monitoring methods to master the leakage situation. This method requires many devices and has high cost. In the underwater caisson, the leaked oil and gas will gather at the top of the caisson, so the leakage situation can be monitored at the top of the caisson. The existing monitoring technology uses ultraviolet fluorescence detection to determine whether there is crude oil leakage. However, when it is applied to the underwater caisson, the following problems may occur: the inside of the underwater caisson is a relatively closed environment, and marine organisms grow rapidly inside. Marine organisms are easy to attach to the detection probe and form a shield, which may cause monitoring failure. Therefore, it is necessary to select a new oil and gas leakage monitoring technology for the underwater caisson.

[0004] The gamma radiation source flowmeter is a mature technology for detecting the phase fraction (volume percentage or mass percentage) of each phase in two-phase flow (oil and gas) or three-phase flow (oil, gas, and water) in the measured fluid. It calculates the phase fraction of each phase in the measured fluid by emitting gamma rays to the measured fluid and obtaining the intensity of the gamma ray signal passing through the measured fluid. This technology can accurately obtain the phase fraction data of the measured fluid, so it is obviously feasible to apply it to the oil and gas leakage monitoring scene at the top of the caisson.

[0005] The existing gamma radiation source flowmeter is designed based on the measurement of closed oil and gas pipelines, and cannot be directly installed in the open space inside the caisson. Therefore, it is necessary to redesign the structure of the oil and gas leakage detection system based on the radiation source. Similar to the gamma radiation source flowmeter, the oil and gas leakage detection system based on the radiation source should also include at least two basic parts: a ray emitting part and a ray receiving part. However, when divers enter the caisson for work and approach the ray emitting part, the radiation source may have physiological and psychological effects on them. Although a low-activity exempt source can be used as the radiation source, the effects cannot be ignored. SUMMARY

[0006] The utility model provides a kind of structure of oil and gas leakage detection system's ray emission based on radioactive source, it is convenient to be preinstalled in the top of underwater caisson;More importantly, it supports the quick shielding of radioactive source, and the main technical scheme as follows is adopted:

[0007] An underwater caisson oil and gas leakage detection system radioactive source emission module, the key is: including the launch end base, the launch end base is equipped with radioactive source assembly, the radioactive source assembly is equipped with a ray emission window;

[0008] The launch end base is provided with shielding cover and shielding switch, the shielding cover is matched with the ray emission window, and the shielding cover and shielding switch are connected by linkage mechanism;The shielding cover opens or closes the ray emission window with the linkage of shielding switch.

[0009] Launch end base is used to wrap radioactive source assembly, so that it can be quickly configured to the top of underwater caisson, shielding switch and shielding cover realize linkage after can quickly open shielding cover to realize the cooperation with radioactive source receiving module, can also quickly close shielding cover to ensure the safety of diver. BRIEF DESCRIPTION OF DRAWINGS

[0010] Figure 1 It is the stereoscopic structure schematic view of radioactive source emission module when ray emission window is opened;

[0011] Figure 2 It is the sectional structure schematic view of radioactive source emission module when ray emission window is opened;

[0012] Figure 3 It is the stereoscopic structure schematic view of radioactive source emission module when ray emission window is closed;

[0013] Figure 4 It is the sectional structure schematic view of radioactive source emission module when ray emission window is closed;

[0014] Figure 5 It is the stereoscopic structure schematic view of emission module preinstallation system. DETAILED DESCRIPTION

[0015] The utility model is further described below in connection with embodiment and drawing.

[0016] Example 1: as Figure 1 , 2, 3, 4, a kind of underwater caisson oil and gas leakage detection system radioactive source emission module, including transmitting end base 1, the transmitting end base 1 is configured with radioactive source assembly 2, the radioactive source assembly 2 is configured with a ray emission window;The ray emission window can extend the transmitting end base 1, it can also be located in the transmitting end base 1 inside, it can also be flush with a side of the transmitting end base 1.Preferring to: the ray emission window is flush with a side of the transmitting end base 1;Correspondingly, the transmitting end base 1 is provided with radioactive source chamber, the radioactive source chamber has the emission window opening in a side of the transmitting end base 1;The radioactive source assembly 2 is assembled in the radioactive source chamber, and the ray emission window of the radioactive source assembly 2 is configured in the emission window.

[0017] The radioactive source assembly 2 includes source warehouse, the inside of the source warehouse is built-in radioactive source, the head of the source warehouse is configured with a ray collimating hole, the head of the source warehouse is configured with a separation pad corresponding to the ray collimating hole, the separation pad is used for physically sealing the ray collimating hole to achieve the purpose of waterproof, the separation pad does not block the ray from the ray collimating hole, the separation pad outside the ray collimating hole forms the ray emission window, the radioactive source is gamma radioactive source, preferably exempted level radioactive source (exempt source, such as 133 Ba、 241 Am), the tail of the source warehouse is provided with source warehouse compression block, and the source warehouse compression block is threadedly connected with the radioactive source chamber, and the source warehouse is made of ray shielding material.

[0018] The transmitting end base 1 is provided with shielding cover 3 and shielding switch 4, the shielding cover 3 is matched with the ray emission window, and the shielding cover 3 and the shielding switch 4 are connected through linkage mechanism 5;The shielding cover 3 opens or closes the ray emission window by linkage with the shielding switch 4.

[0019] The linkage structure of the shielding cover 3, the linkage mechanism 5 and the shielding switch 4 is that the transmitting end base 1 is provided with turnover seat 11, and the shielding cover 3 is hinged with the turnover seat 11;When the shielding cover 3 rotates bidirectionally based on the turnover seat 11, the ray emission window is opened or closed.Preferring to: one side of the shielding cover 3 is the center line of rotation;The transmitting end base 1 is provided with two turnover seats 11, the shielding cover 3 is located between the two turnover seats 11, and the shielding cover 3 is hinged with the two turnover seats 11 respectively, so as to improve the turnover stability and rapid response capability of the shielding cover 3.

[0020] The shielding switch 4 comprises a pressing part 41 movably assembled on the emission end base 1. Preferably, a switch socket 1a is arranged on the emission end base 1, the shielding switch 4 is placed in the switch socket 1a, the shielding switch 4 is axially movable in the switch socket 1a, and the pressing part 41 is connected with the linkage mechanism 5. The pressing part 41 is driven to move by pressing in a simple and stable manner. The shielding switch 4 further comprises a first reset part 42 connected with the emission end base 1 and the pressing part 41. The first reset part 42 is used to reset the pressing part 41. Generally, the state that the shielding cover 3 closes the radiation emission window is the initial state, and the corresponding pressing part 41 is in the reset state. The first reset part 42 is preferably a compression spring arranged between the bottom of the switch socket 1a and the pressing part 41.

[0021] The linkage mechanism 5 comprises a connecting rod 51 hingedly connected with the shielding switch 4 at one end and hingedly connected with the shielding cover 3 at the other end. In order to facilitate the turning of the shielding cover 3, a turning arm 31 is fixed on the shielding cover 3 and can be perpendicular to the shielding cover 3. The free end of the turning arm 31 is hingedly connected with the connecting rod 51. The fixed end of the turning arm 31 is close to the rotation center line of the shielding cover 3. The shielding cover 3 and the emission end base 1 are connected with a second reset part 6. The second reset part 6 is used to reset the shielding cover 3, and the state that the shielding cover 3 closes the radiation emission window is the reset state.

[0022] The first reset part 42 and the second reset part 6 can be used alternatively or simultaneously to increase the redundancy. Meanwhile, the radiation source assembly 2 can also be two.

[0023] The linkage structure of the shielding cover 3, the linkage mechanism 5 and the shielding switch 4 can also be an electric control linkage. The shielding switch 4 is an electric control switch, and the linkage mechanism 5 is a motor assembly capable of responding to the electric control switch. Such an electric control linkage structure, circuit and control logic belong to the prior art, and will not be described here.

[0024] Embodiment 2:

[0025] As Figure 1 , 2 , 3, 4 and Figure 5As shown, an underwater caisson ray emitting module preloading system comprises a caisson body having a ring-shaped caisson wall, the upper end of the caisson wall is provided with a caisson top cover A, the lower surface of the caisson top cover A is provided with a preloading hole for emitting module according to the design position, the emitting module is fixed in the preloading hole, the emitting module comprises an emitting end base 1 embedded in the preloading hole, the emitting end base 1 is connected with the caisson top cover A through bolts; the emitting end base 1 is provided with a radiation source assembly 2, the radiation source assembly 2 is provided with a ray emitting window, the ray emitting window is arranged downward, the ray emitting window is flush with the lower side of the emitting end base 1, and the lower side of the emitting end base 1 is flush with the lower surface of the caisson top cover A; the emitting end base 1 is provided with a radiation source chamber having a emitting window opening on one side of the emitting end base 1; the radiation source assembly 2 is assembled in the radiation source chamber, and the ray emitting window of the radiation source assembly 2 is arranged in the emitting window.

[0026] The emitting end base 1 is provided with a shielding cover 3 and a shielding switch 4, the shielding cover 3 matches the ray emitting window, and the shielding cover 3 and the shielding switch 4 are connected through a linkage mechanism 5; the shielding cover 3 opens or closes the ray emitting window through linkage with the shielding switch 4.

[0027] The emitting end base 1 is provided with a turnover seat 11, and the shielding cover 3 is hinged to the turnover seat 11; when the shielding cover 3 rotates bidirectionally based on the turnover seat 11, the ray emitting window is opened or closed. Preferably, one side edge of the shielding cover 3 is the center line of rotation; the emitting end base 1 is provided with two turnover seats 11, the shielding cover 3 is located between the two turnover seats 11, and the shielding cover 3 is hinged to the two turnover seats 11 respectively, so as to improve the turnover stability and rapid response capability of the shielding cover 3.

[0028] The shielding switch 4 comprises a pressing part 41 movably assembled on the emitting end base 1, preferably, a switch insertion hole 1a is arranged on the emitting end base 1, the shielding switch 4 is placed in the switch insertion hole 1a, the shielding switch 4 can move axially in the switch insertion hole 1a, and the pressing part 41 is connected with the linkage mechanism 5. The pressing part 41 moves through pressing driving in a simple and stable manner; the shielding switch 4 further comprises a first reset part 42 connected with the emitting end base 1 and the pressing part 41, the first reset part 42 resets the pressing part 41; generally, the state that the shielding cover 3 keeps the ray emitting window closed is the initial state, at this time, the corresponding pressing part 41 is in the reset state, and the first reset part 42 is preferably a compression spring located between the hole bottom of the switch insertion hole 1a and the pressing part 41.

[0029] The linkage mechanism 5 comprises a connecting rod 51, one end of which is hinged to the shield switch 4, and the other end of which is hinged to the shield cover 3. In order to facilitate the turning of the shield cover 3, a turning arm 31 is fixed on the shield cover 3, which can be perpendicular to the shield cover 3, and the free end of the turning arm 31 is hinged to the connecting rod 51. The fixed end of the turning arm 31 is close to the rotation center line of the shield cover 3. A second reset member 6 is connected between the shield cover 3 and the emission end base 1, which is used to reset the shield cover 3 and keep the state of closing the radiation emission window as the reset state.

[0030] The first reset member 42 and the second reset member 6 can be used alternatively, or simultaneously to increase the redundancy.

[0031] In order to facilitate the quick connection of the receiving module matched with the emission module, a receiving module fixing assembly 7 is further arranged on the lower surface of the caisson top cover A, which surrounds the emission module. The function of the receiving module fixing assembly 7 is to keep the receiving module at a certain position below the caisson top cover A, and there are various structures of such fixing assembly in the prior art. A specific structure is that the receiving module fixing assembly 7 comprises a fixing cylinder 71, which is arranged vertically and surrounds the emission module, and the upper end of the fixing cylinder 71 is fixedly connected with the caisson top cover A. A guide positioning groove is arranged on the cylinder wall of the fixing cylinder 71, which is arranged along the axial direction of the fixing cylinder 71, and the lower end of the guide positioning groove is open to the lower edge of the fixing cylinder 71. A locking groove is also arranged on the cylinder wall of the fixing cylinder 71, which is also open to the lower edge of the fixing cylinder 71.

[0032] The receiving module is provided with a radiation detection assembly, a guide block, a locking pin, and a switch pin. When the receiving module is inserted into the fixing cylinder 71, the guide block enters along the guide positioning groove, the locking pin enters along the locking groove, and the receiving module is rotated to lock the locking pin and the locking groove. This structure is also the prior art, which will not be described here. When the receiving module is inserted, the switch pin extends into the switch insertion hole la and pushes the pressing part 41 to move, so as to turn the shield cover 3 and open the radiation emission window. The radiation detection assembly is used to receive the gamma rays emitted by the radiation source assembly 2.

[0033] In order to detect whether there is oil and gas leakage on the top of the caisson in time, at least one oil guide hole is arranged through the cylinder wall of the fixing cylinder 71, which is located at the fixed end (upper end) of the fixing cylinder 71. After the oil and gas leakage, the quick detection can be realized, and the function of the oil guide hole is to guide the oil and gas on the top of the caisson to the position of the radiation emission window.

[0034] When oil and gas leakage is monitored, or maintenance, repair, and replacement of the receiving module are needed, a diver dives into the caisson to deal with it, and only needs to remove the receiving module, so that the shielding cover 3 is automatically closed to provide protection for the safety of the diver.

[0035] Beneficial effects: the technical scheme of the utility model can quickly configure the radiation source emitting module to the top of the underwater caisson, the shielding switch and the shielding cover can be quickly linked to open or close the shielding cover, and protection is provided for the safety of the diver.

[0036] Finally, it should be noted that the above description is only a preferred embodiment of the utility model, and those skilled in the art can make various similar expressions under the inspiration of the utility model without violating the purpose and claims of the utility model, and such changes fall within the protection scope of the utility model.

Claims

1. A radioactive source emitting module for an underwater caisson oil and gas leak detection system, characterized in that: It includes a transmitter base (1), on which a radiation source assembly (2) is disposed, and the radiation source assembly (2) is provided with a radiation emission window; The emitting end base (1) is provided with a shielding cover (3) and a shielding switch (4). The shielding cover (3) matches the radiation emission window. The shielding cover (3) and the shielding switch (4) are connected by a linkage mechanism (5). The shielding cover (3) opens or closes the radiation emission window in conjunction with the shielding switch (4).

2. The radioactive source emitting module of the underwater caisson oil and gas leak detection system according to claim 1, characterized in that: The transmitter base (1) is provided with a flip seat (11), and the shielding cover (3) is hinged to the flip seat (11); When the shielding cover (3) rotates bidirectionally based on the flip seat (11), the ray emission window is opened or closed.

3. The radioactive source emission module of the underwater caisson oil and gas leak detection system according to claim 1, characterized in that: One side of the shielding cover (3) is its center line of rotation.

4. The radioactive source emitting module of the underwater caisson oil and gas leak detection system according to claim 1, characterized in that: The transmitter base (1) is provided with two flip seats (11), and the shielding cover (3) is located between the two flip seats (11). The shielding cover (3) is hinged to the two flip seats (11) respectively.

5. The radioactive source emitting module of the underwater caisson oil and gas leak detection system according to claim 1, 2, 3 or 4, characterized in that: The shielding switch (4) includes a pressing part (41), which is movably mounted on the transmitter base (1) and is connected to the linkage mechanism (5).

6. The radioactive source emission module of the underwater caisson oil and gas leak detection system according to claim 5, characterized in that: The shielding switch (4) also includes a first reset member (42), which is connected to both the transmitter base (1) and the pressing part (41).

7. The radioactive source emitting module of the underwater caisson oil and gas leak detection system according to claim 5, characterized in that: The transmitter base (1) is provided with a switch socket (1a), and the shielding switch (4) is placed in the switch socket (1a). The shielding switch (4) can move axially within the switch socket (1a).

8. The radioactive source emitting module of the underwater caisson oil and gas leak detection system according to claim 1, 2, 3 or 4, characterized in that: The linkage mechanism (5) includes a connecting rod (51), one end of which is hinged to the shielding switch (4), and the other end of which is hinged to the shielding cover (3).

9. The radioactive source emitting module of the underwater caisson oil and gas leak detection system according to claim 8, characterized in that: A flip arm (31) is fixed on the shielding cover (3), and the free end of the flip arm (31) is hinged to the connecting rod (51).

10. The radioactive source emitting module of the underwater caisson oil and gas leak detection system according to claim 9, characterized in that: The fixed end of the flipping arm (31) is close to the rotation center line of the shielding cover (3).

11. The radioactive source emitting module of the underwater caisson oil and gas leak detection system according to claim 1, 2, 3 or 4, characterized in that: A second reset member (6) is connected between the shielding cover (3) and the transmitter base (1).

12. The radioactive source emitting module of the underwater caisson oil and gas leak detection system according to claim 1, 2, 3 or 4, characterized in that: The transmitter base (1) is provided with a radiation source chamber, which has a radiation window opening on one side of the transmitter base (1); The radiation source assembly (2) is assembled in the radiation source chamber, and the radiation emission window of the radiation source assembly (2) is disposed in the emission window.

13. A pre-installation system for an underwater caisson ray emission module, comprising a caisson top cover (A), characterized in that: The lower surface of the caisson top cover (A) is designed with a pre-installed sink hole, and the launching module according to any one of claims 1-12 is fixed in the pre-installed sink hole.

14. The underwater caisson ray emission module pre-assembly system according to claim 13, characterized in that: The ray emission window is positioned downwards.

15. The underwater caisson ray emission module pre-assembly system according to claim 13 or 14, characterized in that: The lower surface of the ray emission window is flush with the lower surface of the caisson top cover (A).

16. The underwater caisson X-ray emission module pre-assembly system according to claim 13 or 14, characterized in that: The lower surface of the caisson top cover (A) is also provided with a receiving module fixing component (7), which is arranged around the transmitting module.

17. The underwater caisson ray emission module pre-assembly system according to claim 16, characterized in that: The receiving module fixing assembly (7) includes a fixing cylinder (71) which is arranged around the transmitting module. One end of the fixing cylinder (71) is fixedly connected to the top cover (A) of the caisson.

18. The underwater caisson ray emission module pre-assembly system according to claim 17, characterized in that: The wall of the fixed cylinder (71) has at least one oil guide port, which is located at the fixed end of the fixed cylinder (71).

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