CN215057288U - Multistage sealing device of underground intelligent water distributor circuit board - Google Patents
Multistage sealing device of underground intelligent water distributor circuit board Download PDFInfo
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- CN215057288U CN215057288U CN202120763062.3U CN202120763062U CN215057288U CN 215057288 U CN215057288 U CN 215057288U CN 202120763062 U CN202120763062 U CN 202120763062U CN 215057288 U CN215057288 U CN 215057288U
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Abstract
A multi-stage sealing device of an underground intelligent water distributor circuit board comprises a primary sealing device and a secondary sealing device; the primary sealing device is formed by sequentially connecting a joint, an outer protective cylinder and a circuit board bracket in a threaded manner; the secondary sealing device consists of a first sealing rubber plug combination, a second sealing rubber plug combination, a circuit board protection cylinder and a third sealing rubber plug combination; the first sealing rubber plug combination is connected with the joint through threads, two ends of the circuit board protection cylinder are respectively connected with the circuit board support and the second sealing rubber plug combination through threads, and the third sealing rubber plug combination is connected with the circuit board support through threads; the multistage sealing protection of the circuit board of the intelligent water distributor can be realized, and the working stability and reliability of an underground circuit system are ensured.
Description
Technical Field
The utility model belongs to the downhole tool that the technique was used is divided to marine oil field water injection well intelligence, especially relates to a multistage sealing device of intelligent water injection mandrel circuit board in pit.
Background
In recent years, intelligent separate injection technology is continuously popularized in oil fields, and the number of application wells is continuously increased. For the intelligent separate injection technology, the underground intelligent water distributor realizes the online monitoring and transmission of data through a whole set of circuit system of an integrated battery, a circuit board, a motor and the like, thereby realizing the online intelligent measurement and adjustment. A large number of electronic components are integrated on the circuit board, and if sealing protection is not performed, the whole water distributor is short-circuited and cannot work normally. The design of the circuit board sealing device is particularly important due to the complex underground environment, high temperature, high pressure and high vibration frequency.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a multistage sealing device of intelligence injection mandrel circuit board in pit to solve the sealed technical problem of circuit board.
In order to achieve the above object, the utility model discloses a multistage sealing device of intelligence injection mandrel circuit board in pit's concrete technical scheme as follows:
a multi-stage sealing device of an underground intelligent water distributor circuit board comprises a primary sealing device and a secondary sealing device; the primary sealing device is formed by sequentially connecting a joint, an outer protective cylinder and a circuit board bracket in a threaded manner; the secondary sealing device consists of a first sealing rubber plug combination, a second sealing rubber plug combination, a circuit board protection cylinder and a third sealing rubber plug combination; the first sealing rubber plug combination is connected with the joint through threads, two ends of the circuit board protection cylinder are respectively connected with the circuit board support and the second sealing rubber plug combination through threads, and the third sealing rubber plug combination is connected with the circuit board support through threads.
The multistage sealing device of the circuit board of the underground intelligent water distributor comprises a connector, an outer protective cylinder and a circuit board support, wherein the connector, the outer protective cylinder and the circuit board support are sequentially connected in a threaded manner; the joint is a pipe section with a through hole inside, external threads are respectively arranged at the upper end and the lower end of the joint, the external threads at the upper end are connected with an upper electrical appliance mechanical structure, and the external threads at the lower end are connected with an outer protective cylinder; the inner wall of the lower end of the pipe section is provided with internal threads for connecting the first sealing rubber plug in a combined manner, and a through hole in the pipe section is a first threading channel through which a power supply wire passes; the upper part of the circuit board bracket is a hollow square flat plate, four screw holes are arranged on the flat plate and used for installing and fixing a circuit board, and a circuit board protection cylinder is sleeved outside the flat plate and used for secondary protection of the circuit board; the lower part is a hollow cylinder with the diameter gradually increasing from top to bottom, the outer wall of the cylinder is sequentially provided with a small-diameter external thread section and a large-diameter external thread section from top to bottom, the inner wall of the large-diameter external thread section of the cylinder is sequentially provided with a first internal thread section and a second internal thread section, the small-diameter external thread section is used for being connected with one end of a circuit board protection cylinder, and the other end of the circuit board protection cylinder is connected with an inserted short circuit of a second sealing rubber plug combination; the large-diameter external thread section is used for connecting an external protective cylinder, the first internal thread section is used for being connected with a third sealing rubber plug in a combined mode, and the second internal thread section is used for being connected with a lower electrical appliance mechanical structure; the lower end of the upper hollow square flat plate is fixed at the upper end of the lower hollow cylinder, and a second threading channel through which a power supply line passes is arranged inside the upper end of the hollow cylinder.
In the multistage sealing device for the circuit board of the underground intelligent water distributor, the first sealing rubber plug combination of the second sealing device consists of an insertion short circuit, a sealing rubber plug base, a high-pressure sealing rubber plug, a fixed short circuit and a conductive contact pin; one end of the plug-in short circuit is connected with the lower end of the joint, one end of the sealing rubber plug base is in threaded connection with the other end of the plug-in short circuit, one end of the high-pressure sealing rubber plug is connected with the other end of the sealing rubber plug base in an interference fit manner, the fixing short circuit is sleeved outside the high-pressure sealing rubber plug and is in threaded connection with the plug-in short circuit to fix the high-pressure sealing rubber plug, and a conductive contact pin is arranged inside the sealing rubber plug base; the structure of the second sealing rubber plug combination and the structure of the third sealing rubber plug combination of the secondary sealing device are the same as the structure of the first sealing rubber plug combination; the upper end of the conductive pin of the first sealing rubber plug combination is connected with a wire penetrating from the first threading channel, the lower end of the conductive pin is inserted into the high-pressure sealing rubber plug, the wire connected with the lower end of the conductive pin penetrates out of the high-pressure sealing rubber plug and is connected with the upper end of the conductive pin of the second sealing rubber plug combination, the upper end of the conductive pin of the second sealing rubber plug combination is inserted into the high-pressure sealing rubber plug of the second sealing rubber plug combination, and the wire connected with the lower end of the conductive pin is connected with a circuit board; the electric wire connected with the circuit board is connected with the upper end of the conductive pin of the third sealing rubber plug combination, the lower end of the conductive pin of the third sealing rubber plug combination is inserted into the high-pressure sealing rubber plug of the third sealing rubber plug combination, and the electric wire connected with the lower end of the conductive pin penetrates out of the high-pressure sealing rubber plug and is connected with the electrical machinery structure at the lower end, so that the circuit is ensured to be in a path state.
In the multistage sealing device for the circuit board of the underground intelligent water distributor, two O-shaped sealing rings are respectively arranged at threaded joints between the joint and the outer protective cylinder and between the outer protective cylinder and the circuit board support in the first-stage sealing device, so as to form first-stage sealing protection for the circuit board of the water distributor.
According to the multistage sealing device for the circuit board of the underground intelligent water distributor, the second-stage sealing device realizes second-stage sealing protection of the circuit board under the condition that the first-stage sealing fails through the first sealing rubber plug combination, the second sealing rubber plug combination, the third sealing rubber plug combination and the circuit board protection barrel.
In the multistage sealing device for the circuit board of the underground intelligent water distributor, the electric wire penetrated through the first threading channel penetrates through the first sealing rubber plug combination and the second sealing rubber plug combination, then is connected with the circuit board fixed on the circuit board support, and then penetrates through the third sealing rubber plug combination and is connected with the electrical machinery structure positioned at the lower end of the third sealing rubber plug combination; when the electric wire passes through the first sealing rubber plug combination, the second sealing rubber plug combination and the third sealing rubber plug combination, water or steam can be effectively prevented from entering the circuit system from the threading position by means of the high-pressure sealing rubber plugs arranged in the three sealing rubber plug combinations respectively.
The utility model discloses a multistage sealing device of intelligence injection mandrel circuit board in pit has following advantage: 1. two O-shaped rings are arranged on the threaded connection sealing surfaces between the joint and the outer protective cylinder and between the outer protective cylinder and the circuit board bracket, so that the one-stage sealing protection of the circuit board of the water distributor is realized; 2. the sealing rubber plug combination and the circuit board protection barrel are arranged outside the circuit board, so that the secondary sealing protection of the circuit board of the water distributor can be realized under the condition that the primary sealing fails; 3. all threading places all use sealed plug, can effectively avoid water or steam to get into circuit system from the threading department to improve circuit system job stabilization nature and reliability.
A multistage sealing device suitable for an underground intelligent water distributor circuit board comprises a first-stage sealing device and a second-stage sealing device. The primary sealing device consists of a joint, an outer protective cylinder and a circuit board support, wherein the joint, the outer protective cylinder and the circuit board support are connected through threads, an O ring is used for realizing primary sealing, a first threading channel is arranged in the joint, and a second threading channel is arranged in the circuit board support; the secondary sealing device is composed of a first sealing rubber plug combination, a second sealing rubber plug combination, a circuit board protection cylinder and a third sealing rubber plug combination.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention.
Fig. 2 is a schematic view of the rubber plug sealing combination structure of the present invention.
Fig. 3 is a schematic diagram of the circuit board support structure of the present invention.
The main reference numbers in the figures illustrate: 1, a joint; 2, an outer protective cylinder; 3, a circuit board bracket; 31 a hollow square flat plate; 32 screw holes; 33 small diameter external thread section; 34 large diameter external thread section; 35 a first internal thread segment; 36 a second internal thread segment; 4 a first threading channel; 5 a second threading channel; 6, combining a first sealing rubber plug; 61 inserting a short circuit; 62 sealing the rubber plug base; 63, sealing the rubber plug under high pressure; 64 fixing a short circuit; 65 conductive pins; 7, combining a second sealing rubber plug; 8, a circuit board protection cylinder; and 9, combining a third sealing rubber plug.
Detailed Description
In order to better understand the purpose, structure and function of the present invention, the following description is made in detail with reference to the accompanying drawings.
As shown in fig. 1, 2 and 3, the multi-stage sealing device of the circuit board of the underground intelligent water distributor of the present invention comprises a first-stage sealing device and a second-stage sealing device; the primary sealing device is formed by sequentially connecting a joint 1, an outer protective sleeve 2 and a circuit board bracket 3 in a threaded manner; the secondary sealing device consists of a first sealing rubber plug combination 6, a second sealing rubber plug combination 7, a circuit board protection cylinder 8 and a third sealing rubber plug combination 9; the first sealing rubber plug combination 6 is connected with the joint 1 through threads, two ends of the circuit board protection cylinder 8 are respectively connected with the circuit board support 3 and the second sealing rubber plug combination 7 through threads, and the third sealing rubber plug combination 9 is connected with the circuit board support 3 through threads.
As shown in fig. 1, fig. 2 and fig. 3, the utility model discloses a multistage sealing device of intelligent water injection mandrel circuit board in pit, wherein:
the primary sealing device is formed by sequentially connecting a joint 1, an outer protective sleeve 2 and a circuit board bracket 3 in a threaded manner; the joint 1 is a pipe section with a through hole inside, external threads are respectively arranged at the upper end and the lower end of the joint, the external threads at the upper end are connected with an upper electrical appliance mechanical structure, and the external threads at the lower end are connected with an outer protective cylinder 2; the inner wall of the lower end of the pipe section is provided with internal threads for connecting a first sealing rubber plug combination 6, and a through hole in the pipe section is a first threading channel 4 through which a power supply wire passes; the upper part of the circuit board bracket 3 is a hollow square flat plate 31, four screw holes 32 are arranged on the flat plate and used for installing and fixing a circuit board, and a circuit board protection cylinder 8 is sleeved outside the flat plate and used for secondary protection of the circuit board; the lower part is a hollow cylinder with the diameter gradually increasing from top to bottom, the outer wall of the cylinder is sequentially provided with a small-diameter external thread section 33 and a large-diameter external thread section 34 from top to bottom, the inner wall of the cylinder provided with the large-diameter external thread section 34 is sequentially provided with a first internal thread section 35 and a second internal thread section 36, the small-diameter external thread section 33 is used for connecting one end of a circuit board protection cylinder 8, and the other end of the circuit board protection cylinder 8 is connected with the insertion short circuit of the second sealing rubber plug combination 7; the large-diameter external thread section 34 is used for connecting the external protective cylinder 2, the first internal thread section 35 is used for connecting the third sealing rubber plug assembly 9, and the second internal thread section 36 is used for connecting a lower electrical appliance mechanical structure; the lower end of the upper hollow square flat plate 31 is fixed at the upper end of the lower hollow cylinder, and the inside of the upper end of the hollow cylinder is provided with a second threading channel 5 through which a power supply wire passes.
The first sealing rubber plug combination 6 of the secondary sealing device consists of an inserted short circuit 61, a sealing rubber plug base 62, a high-pressure sealing rubber plug 63, a fixed short circuit 64 and a conductive contact pin 65; one end of the inserted short circuit 61 is connected with the lower end of the connector 1, one end of the sealing rubber plug base 62 is in threaded connection with the other end of the inserted short circuit 61, one end of the high-pressure sealing rubber plug 63 is connected with the other end of the sealing rubber plug base 62 in an interference fit manner, the fixed short circuit 64 is sleeved outside the high-pressure sealing rubber plug 63 and is in threaded connection with the inserted short circuit 61 to fix the high-pressure sealing rubber plug 63, and the conductive contact pin 65 is arranged inside the sealing rubber plug base 62; the structure of the second sealing rubber plug combination 7 and the structure of the third sealing rubber plug combination 9 of the second-stage sealing device are the same as the structure of the first sealing rubber plug combination 6.
The upper end of a conductive pin 65 of the first sealing rubber plug combination 6 is connected with a wire penetrating from the first threading channel 4, the lower end of the conductive pin is inserted into the high-pressure sealing rubber plug 63, the wire connected with the lower end of the conductive pin 65 penetrates out of the high-pressure sealing rubber plug 63 and is connected with the upper end of the conductive pin of the second sealing rubber plug combination 7, the upper end of the conductive pin of the second sealing rubber plug combination 7 is inserted into the high-pressure sealing rubber plug of the second sealing rubber plug combination, and the wire connected with the lower end of the conductive pin is connected with a circuit board; the electric wire connected with the circuit board is connected with the upper end of the conductive pin of the third sealing rubber plug combination 9, the lower end of the conductive pin of the third sealing rubber plug combination 9 is inserted in the high-pressure sealing rubber plug of the third sealing rubber plug combination, and the electric wire connected with the lower end of the conductive pin penetrates out of the high-pressure sealing rubber plug and is connected with the electrical machinery structure at the lower end, so that the circuit is ensured to be in a path state.
In the primary sealing device, two O-shaped sealing rings are respectively arranged at the threaded connection positions between the joint 1 and the outer protective cylinder 2 and between the outer protective cylinder 2 and the circuit board support 3, so that primary sealing protection for the circuit board of the water distributor is formed.
The secondary sealing device realizes secondary sealing protection of the circuit board through the first sealing rubber plug combination 6, the second sealing rubber plug combination 7, the third sealing rubber plug combination 9 and the circuit board protection barrel 8 under the condition that primary sealing fails.
The electric wire penetrated by the first threading channel 4 passes through the first sealing rubber plug combination 6 and the second sealing rubber plug combination 7, then is connected with the circuit board fixed on the circuit board bracket 3, and then passes through the third sealing rubber plug combination 9 to be connected with the electric appliance mechanical structure positioned at the lower end of the third sealing rubber plug combination; when the electric wire passes through the first sealing rubber plug combination 6, the second sealing rubber plug combination 7 and the third sealing rubber plug combination 8, water or steam can be effectively prevented from entering the circuit system from the threading position by means of the high-pressure sealing rubber plugs arranged in the three sealing rubber plug combinations respectively.
Example (b):
as shown in fig. 1, fig. 2, fig. 3, the utility model discloses a when multistage sealing device of intelligent water distributor circuit board in the pit used, pass through screw and circuit board support 3's screw 32 with the circuit board of intelligent water distributor in the pit and fix on circuit board support 3's hollow square flat plate 31, the electric wire of intelligent water distributor configuration in the pit at first passes first threading passageway 4 in the joint 1, it is continuous with the circuit board of fixing on hollow square flat plate 31 after passing first sealed plug combination 6 and the sealed plug combination 7 of second in proper order after that, this electric wire passes second threading passageway 5 and the sealed plug combination 9 of third again, penetrate the electromechanical structure who is located this multistage sealing device lower extreme of intelligent water distributor circuit board in the pit at last, be connected with electromechanical structure's circuit.
The utility model discloses a when multistage sealing device of intelligence water injection mandrel circuit board in pit used, the threaded connection department that connects 1 and outer casing 2 and between outer casing 2 and the circuit board support 3 is equipped with twice O type sealing washer respectively, constitutes the one-level sealing protection to the water injection mandrel circuit board. The secondary sealing device can realize secondary sealing protection of the circuit board through the first sealing rubber plug combination 6, the second sealing rubber plug combination 7, the third sealing rubber plug combination 9 and the circuit board protection barrel 8 under the condition that the primary sealing fails. The electric wire penetrated by the first threading channel 4 passes through the first sealing rubber plug combination 6 and the second sealing rubber plug combination 7, then is connected with the circuit board fixed on the hollow square flat plate 31, then passes through the third sealing rubber plug combination 9, finally penetrates through the electrical mechanical structure at the lower end of the multi-stage sealing device of the circuit board of the underground intelligent water distributor and is connected with the circuit of the electrical mechanical structure; when the electric wire passes through the first sealing rubber plug combination 6, the second sealing rubber plug combination 7 and the third sealing rubber plug combination 8, water or steam can be effectively prevented from entering the circuit system from the threading position by means of the high-pressure sealing rubber plugs in the three sealing rubber plug combinations.
The content that is not described in this embodiment is the prior art, and therefore, the description thereof is omitted.
It is to be understood that the present invention has been described with reference to certain embodiments, and that various changes or equivalents may be substituted for elements thereof by those skilled in the art without departing from the spirit and scope of the invention. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the invention without departing from the essential scope thereof. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of the present application are intended to be covered by the present invention.
Claims (6)
1. A multistage sealing device of an underground intelligent water distributor circuit board is characterized by comprising a primary sealing device and a secondary sealing device; the primary sealing device is formed by sequentially connecting a joint (1), an outer protective sleeve (2) and a circuit board bracket (3) in a threaded manner; the secondary sealing device consists of a first sealing rubber plug combination (6), a second sealing rubber plug combination (7), a circuit board protection cylinder (8) and a third sealing rubber plug combination (9); the first sealing rubber plug combination (6) is connected with the joint (1) through threads, two ends of the circuit board protection cylinder (8) are respectively connected with the circuit board support (3) and the second sealing rubber plug combination (7) through threads, and the third sealing rubber plug combination (9) is connected with the circuit board support (3) through threads.
2. The multi-stage sealing device of a downhole intelligent water distributor circuit board according to claim 1,
the primary sealing device is formed by sequentially connecting a joint (1), an outer protective sleeve (2) and a circuit board bracket (3) in a threaded manner;
the joint (1) is a pipe section with a through hole inside, external threads are respectively arranged at the upper end and the lower end of the pipe section, the external threads at the upper end are connected with an upper electrical appliance mechanical structure, and the external threads at the lower end are connected with an outer protective cylinder (2); the inner wall of the lower end of the pipe section is provided with internal threads for connecting a first sealing rubber plug combination (6), and a through hole in the pipe section is a first threading channel (4) through which a power supply wire passes;
the upper part of the circuit board bracket (3) is a hollow square flat plate (31), four screw holes (32) are arranged on the flat plate and used for installing and fixing a circuit board, and a circuit board protection cylinder (8) is sleeved outside the flat plate and used for secondary protection of the circuit board; the lower part is a hollow cylinder with the diameter gradually increasing from top to bottom, the outer wall of the cylinder is sequentially provided with a small-diameter external thread section (33) and a large-diameter external thread section (34) from top to bottom, the inner wall of the cylinder provided with the large-diameter external thread section (34) is sequentially provided with a first internal thread section (35) and a second internal thread section (36), the small-diameter external thread section (33) is used for connecting one end of a circuit board protection cylinder (8), and the other end of the circuit board protection cylinder (8) is connected with the inserted short circuit of a second sealing rubber plug combination (7); the large-diameter external thread section (34) is used for connecting the external protective cylinder (2), the first internal thread section (35) is used for connecting the third sealing rubber plug combination (9), and the second internal thread section (36) is used for connecting the lower electrical appliance mechanical structure;
the lower end of the upper hollow square flat plate (31) is fixed at the upper end of the lower hollow cylinder, and a second threading channel (5) through which a power supply line passes is arranged inside the upper end of the hollow cylinder.
3. The multistage sealing device of a circuit board of a downhole intelligent water distributor according to claim 1, wherein the first sealing rubber plug combination (6) of the secondary sealing device is composed of an insertion short circuit (61), a sealing rubber plug base (62), a high-pressure sealing rubber plug (63), a fixed short circuit (64) and a conductive contact pin (65); one end of the plug-in short circuit (61) is connected with the lower end of the joint (1), one end of the sealing rubber plug base (62) is in threaded connection with the other end of the plug-in short circuit (61), one end of the high-pressure sealing rubber plug (63) is connected with the other end of the sealing rubber plug base (62) in an interference fit manner, the fixing short circuit (64) is sleeved outside the high-pressure sealing rubber plug (63) and is connected with the plug-in short circuit (61) in a threaded manner to fix the high-pressure sealing rubber plug (63), and a conductive contact pin (65) is arranged inside the sealing rubber plug base (62);
the structures of a second sealing rubber plug combination (7) and a third sealing rubber plug combination (9) of the secondary sealing device are the same as the structure of the first sealing rubber plug combination (6);
the upper end of a conductive pin (65) of the first sealing rubber plug combination (6) is connected with a wire penetrating from the first threading channel (4), the lower end of the conductive pin is inserted into the high-pressure sealing rubber plug (63), the wire connected with the lower end of the conductive pin (65) penetrates out of the high-pressure sealing rubber plug (63) and is connected with the upper end of the conductive pin of the second sealing rubber plug combination (7), the upper end of the conductive pin of the second sealing rubber plug combination (7) is inserted into the high-pressure sealing rubber plug of the second sealing rubber plug combination, and the wire connected with the lower end of the conductive pin is connected with a circuit board; the electric wire connected with the circuit board is connected with the upper end of the conductive pin of the third sealing rubber plug combination (9), the lower end of the conductive pin of the third sealing rubber plug combination (9) is inserted into the high-pressure sealing rubber plug of the third sealing rubber plug combination, and the electric wire connected with the lower end of the conductive pin penetrates out of the high-pressure sealing rubber plug and is connected with the electrical machinery structure at the lower end, so that the circuit is ensured to be in a path state.
4. The multistage sealing device of the circuit board of the underground intelligent water distributor according to claim 2, wherein in the first-stage sealing device, two O-shaped sealing rings are respectively arranged at the threaded connection positions between the joint (1) and the outer protecting cylinder (2) and between the outer protecting cylinder (2) and the circuit board support (3) to form first-stage sealing protection for the circuit board of the water distributor.
5. The multistage sealing device of a downhole intelligent water distributor circuit board according to claim 2, wherein the secondary sealing device realizes secondary sealing protection of the circuit board through the first sealing rubber plug combination (6), the second sealing rubber plug combination (7), the third sealing rubber plug combination (9) and the circuit board protection barrel (8) under the condition that the primary sealing fails.
6. The multistage sealing device of the circuit board of the underground intelligent water distributor according to the claim 1, wherein the electric wire threaded through the first threading channel (4) passes through the first sealing rubber plug combination (6) and the second sealing rubber plug combination (7), then is connected with the circuit board fixed on the circuit board bracket (3), and then passes through the third sealing rubber plug combination (9) to be connected with the electrical mechanical structure at the lower end of the third sealing rubber plug combination; when the electric wire passes through the first sealing rubber plug combination (6), the second sealing rubber plug combination (7) and the third sealing rubber plug combination (8), water or steam can be effectively prevented from entering a circuit system from a threading position by means of the high-pressure sealing rubber plugs arranged in the three sealing rubber plug combinations respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120763062.3U CN215057288U (en) | 2021-04-15 | 2021-04-15 | Multistage sealing device of underground intelligent water distributor circuit board |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120763062.3U CN215057288U (en) | 2021-04-15 | 2021-04-15 | Multistage sealing device of underground intelligent water distributor circuit board |
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| Publication Number | Publication Date |
|---|---|
| CN215057288U true CN215057288U (en) | 2021-12-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120763062.3U Active CN215057288U (en) | 2021-04-15 | 2021-04-15 | Multistage sealing device of underground intelligent water distributor circuit board |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215057288U (en) |
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2021
- 2021-04-15 CN CN202120763062.3U patent/CN215057288U/en active Active
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