CN218671151U - Gas pipe with rubber sealing gasket and good sealing performance - Google Patents
Gas pipe with rubber sealing gasket and good sealing performance Download PDFInfo
- Publication number
- CN218671151U CN218671151U CN202222221534.XU CN202222221534U CN218671151U CN 218671151 U CN218671151 U CN 218671151U CN 202222221534 U CN202222221534 U CN 202222221534U CN 218671151 U CN218671151 U CN 218671151U
- Authority
- CN
- China
- Prior art keywords
- gas
- pipe
- subassembly
- clamp plate
- way pipe
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Pipe Accessories (AREA)
Abstract
The utility model discloses a take gas pipe that rubber seal gasket's leakproofness is good, including the cross pipe subassembly, the cross pipe subassembly centre gripping is spacing to be fixed on pipeline gas transmission device, runs through in the cross pipe subassembly and salvagees mediation subassembly, salvagees and dismantles the installation auxiliary stay subassembly on the mediation subassembly, the cross pipe subassembly includes first cross pipe clamp plate, and first cross pipe clamp plate passes through the bolt and constitutes dismantlement mounting structure with second cross pipe clamp plate, and the rubber seal gasket who sets up between first ring flange on the first cross pipe clamp plate and the pipeline gas transmission device prevents that the gas leaks. This take good gas pipe of rubber seal gasket's leakproofness is provided with cross-pipe assembly and pipeline gas transmission device, and on the mediation subassembly was salvageed in the cross-pipe assembly installation, after the leakproofness was confirmed to the shutoff hydraulic press, rubber seal gasket was pasted to the section that the sandwich valve body contacted with first ring flange, and better realization sealing performance prevents that the gas from permeating the flange terminal surface and revealing away, causes the environmental pollution.
Description
Technical Field
The utility model relates to a gas pipe technical field specifically is a take good gas pipe of rubber seal gasket's leakproofness.
Background
Along with the acceleration of the national urbanization process, the construction and development of town gas pipe networks are huge day by day, pipe network gas supply is taken as the main mode of the current town gas supply, high-quality energy is provided for the life of urban workers, businesses and residents, but the following gas pipe network leakage events are more and more, and great challenges are brought to the daily safety management of the pipe network gas supply.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a gas pipe that rubber seal gasket's leakproofness is good has the local pipe that trades in order to solve the traditional pipeline corrosion perforation rush-repair method that proposes in the above-mentioned background art, the local welding mending leak etc. of executing, the construction is complicated, need step down, the gas stopping, issue in advance and stop the gas notice etc. need use large-scale mechanical equipment, portable electric tool and vehicle machinery etc. especially, there are many unsafe factors in the operation of taking the gas, and there is the loss of a large amount of gas energy in the in-process of diffusing in step down, influence user's normal use at step down gas stopping in-process, pipeline operation duration is long simultaneously, corrode seriously, cause incident such as gas leakage more and more, constitute the threat to resident user's normal air feed and social safety, economic interests to the enterprise has also caused the problem of certain influence.
In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a take gas pipe that rubber seal gasket's leakproofness is good, includes the cross-pipe subassembly, and the cross-pipe subassembly centre gripping is spacing to be fixed on pipeline gas transmission device, runs through in the cross-pipe subassembly and salvagees mediation subassembly, salvagees and dismantle the supplementary supporting component of installation on the mediation subassembly, the cross-pipe subassembly includes first cross-pipe clamp plate, and first cross-pipe clamp plate passes through the bolt and constitutes dismantlement mounting structure with second cross-pipe clamp plate, and the rubber seal gasket that sets up between first ring flange on the first cross-pipe clamp plate and the pipeline gas transmission device prevents that the gas leaks.
Preferably, all set up the corrosion-resistant layer on first four-way pipe clamp plate and the second four-way pipe clamp plate, sealed elastic lining that sets up on the corrosion-resistant layer is sealed to prevent leaking the four-way pipe subassembly with salvage mediation subassembly junction.
By adopting the technical scheme, the corrosion-resistant layer is arranged to play a role in corrosion resistance.
Preferably, pipeline gas transmission device includes first row of subassembly, and first row of subassembly is the same with the second row of subassembly structure, and the second is discharged the subassembly and is used for carrying the gas through interim gas-supply pipe intercommunication with first row of subassembly.
Preferably, the pipeline gas transmission device comprises a first discharge assembly, the first discharge assembly comprises a sandwich valve body, the first discharge assembly is detached from and installed on the blocking hydraulic machine, and the blocking hydraulic machine is transplanted to other positions for use in the later period.
Through adopting above-mentioned technical scheme, guarantee the gas and normally carry when the gas pipe maintenance through setting up pipeline gas transmission device.
Preferably, salvage mediation subassembly includes first gas-supply pipe, and the one end that first gas-supply pipe and third gas-supply pipe are close to the second gas-supply pipe all welds the second ring flange, and the third ring flange is all welded at second gas-supply pipe both ends, and the third ring flange passes through the bolt and dismantles the installation second ring flange, and the rubber seal gasket between second ring flange and the third ring flange seals, prevents that the gas from revealing.
Preferably, the auxiliary supporting assembly comprises a first limiting pressing plate, the first limiting pressing plate is detached and installed with a second limiting pressing plate through a bolt, the two sets of first limiting pressing plates and the second limiting pressing plate are respectively clamped and fixed on the first gas pipe and the second gas pipe, and the two sets of first limiting pressing plates and the second limiting pressing plate support and limit the third gas pipe through a first screw, a second screw and a nut.
Through adopting above-mentioned technical scheme, can play the auxiliary stay effect to salvageing mediation subassembly through the setting of auxiliary stay subassembly.
Compared with the prior art, the beneficial effects of the utility model are that: the gas pipe with the rubber sealing gasket and good sealing performance,
(1) The four-way pipe assembly and the pipeline gas conveying device are arranged, the four-way pipe assembly is installed on the rush repair dredging assembly, after the sealing performance is confirmed by the plugging hydraulic machine, the sandwich valve body is opened, the expansion barrel acts in the pipeline through the sandwich valve body, the four-way pipes of the pipelines on two sides are connected at the same end to establish a bypass supply line, the gas in the first discharge assembly on the left side enters the second discharge assembly through the temporary gas pipe and is discharged through the second gas pipe, the safety and the convenience of pipeline maintenance are improved, the normal supply of resident gas is ensured, the economic benefit of an enterprise is improved, a rubber sealing gasket is adhered to the contact section of the sandwich valve body and the first flange plate, the sealing performance is better realized, the gas is prevented from leaking out through the end surface of the flange plate, the environmental pollution is caused, and meanwhile, the potential safety hazard is brought to operating personnel;
(2) The four-way pipe assembly is arranged, the part of the four-way pipe assembly, which is connected with the first gas pipe and the second gas pipe, is of a split structure, the cylindrical surfaces, which are contacted with the first gas pipe and the second gas pipe, are provided with the corrosion-resistant layer and the sealing elastic lining, the corrosion-resistant layer is arranged to have high strength and corrosion resistance, serious corrosion is avoided, safety accidents such as gas leakage and the like are caused, the sealing elastic lining is arranged to ensure that the four-way pipe is tightly connected with the pipeline, after the pipeline is prevented from being opened, gas is leaked and overflowed through a joint surface gap, and the normal gas supply and social safety of residential users are threatened.
Drawings
FIG. 1 is a schematic view of the front view structure of the present invention;
FIG. 2 is a schematic view of the four-way pipe assembly of the present invention;
fig. 3 is a schematic view of the distribution structure of the first flange on the first four-way pipe pressing plate of the present invention;
fig. 4 is a schematic view of the three-dimensional structure of the four-way pipe assembly of the present invention.
In the figure: 1. the four-way pipe assembly comprises a four-way pipe assembly, 11, a first four-way pipe pressing plate, 12, a second four-way pipe pressing plate, 13, a corrosion-resistant layer, 14, a sealing elastic lining, 15, a first flange plate, 2, a rubber sealing gasket, 3, a pipeline gas conveying device, 31, a first discharge assembly, 311, a sandwich valve body, 312, a plugging hydraulic machine, 32, a temporary gas pipe, 33, a second discharge assembly, 4, an emergency repair dredging assembly, 41, a first gas pipe, 42, a second flange plate, 43, a third flange plate, 44, a second gas pipe, 45, a bolt, 46, a second gas pipe, 5, an auxiliary supporting assembly, 51, a first limiting pressing plate, 52, a second limiting pressing plate, 53, a first screw rod, 54, a second screw rod, 55 and a nut.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts all belong to the protection scope of the present invention.
Referring to fig. 1-4, the present invention provides a technical solution: the utility model provides a take good gas pipe of leakproofness of rubber seal gasket as shown in figure 1, figure 2 and figure 3, including four- way pipe assembly 1, 1 centre gripping of four-way pipe assembly is spacing to be fixed on pipeline gas transmission device 3, runs through in the four-way pipe assembly 1 and salvagees mediation subassembly 4, salvagees and dismantles installation auxiliary stay subassembly 5 on the mediation subassembly 4.
Specifically, the four-way pipe assembly 1 is installed on a first gas pipe 41 and a third gas pipe 46, one side of a first four-way pipe pressing plate 11 is connected with a sandwich valve body 311 through a first flange 15, the sandwich valve body 311 is connected with a hole header through a flange, a hole drill is located in the header, when the hole is opened, the sandwich valve body 311 is opened, the hole drill penetrates through the sandwich valve to act on a gas pipeline, the hole opening operation is completed, after the hole opening operation is completed, the sandwich valve body 311 is closed, a hole opening hydraulic unit is taken down and replaced by a plugging hydraulic machine 312, after the sealing performance is confirmed, the sandwich valve body 311 is opened, an expansion barrel acts on the pipeline through the sandwich valve body 311, two side temporary gas pipes 32 are communicated with the first discharge assembly 31 and the second discharge assembly 33, a bypass supply line is established, operation emergency repair is carried out after operation gas is discharged through a discharge pipe, research and development of the system greatly improve safety and convenience of pipeline maintenance, and normal supply of resident gas is guaranteed.
In the preferred scheme of this embodiment, the four-way pipe assembly 1 is installed on first gas pipe 41 and third gas pipe 46, first four-way pipe clamp plate 11 one side is connected with the sandwich valve body 311 through first ring flange 15, sandwich valve body 311 links to each other with the trompil header through the flange, the trompil bores and is located the header, during the trompil, sandwich valve body 311 is opened, the trompil bores and passes the sandwich valve and act on the gas pipeline, accomplish the trompil operation, after the trompil operation is accomplished, close sandwich valve body 311, take down the trompil hydraulic unit, change to shutoff hydraulic machine 312, confirm the leakproofness after, open sandwich valve body 311, the expansion tank passes through sandwich valve body 311 and acts on in the pipeline, the interim gas pipe 32 in both sides communicates first discharge assembly 31 and second discharge assembly 33, establish the bypass supply line, the staff of being convenient for salvage the salvage operation to salvage mediation assembly 4, the supplementary support assembly 5 on the salvage mediation assembly 4 plays the supplementary support to salvage mediation assembly 4.
As shown in fig. 1, fig. 2 and fig. 3, the four-way pipe assembly 1 includes a first four-way pipe pressing plate 11, the first four-way pipe pressing plate 11 and a second four-way pipe pressing plate 12 constitute through bolts 45 and dismantle the mounting structure, the rubber sealing gasket 2 that sets up between the first ring flange 15 on the first four-way pipe pressing plate 11 and the pipeline gas transmission device 3 prevents the gas leakage, all set up corrosion-resistant layer 13 on first four-way pipe pressing plate 11 and the second four-way pipe pressing plate 12, the sealed elastic lining 14 that sets up on the corrosion-resistant layer 13 is sealed leak-proof to the four-way pipe assembly 1 and salvage mediation subassembly 4 junction.
Specifically, first four-way pipe clamp plate 11 and second four-way pipe clamp plate 12 are the components of a whole that can function independently structure, corrosion resistant layer 13 is solved along with the pipeline operation duration is long, it is serious to corrode, cause the more and more problem of incident such as gas leakage, sealed elastic lining 14's setting guarantees four-way pipe and pipeline zonulae occludens, prevent behind the pipeline opening, the gas is revealed through the junction gap and is spilled over, first four-way pipe clamp plate 11 and second four-way pipe clamp plate 12 all are provided with two sets ofly, two sets of first four-way pipe clamp plate 11 and second four-way pipe clamp plate 12 are about the symmetrical setting of second gas-supply pipe 44.
In the preferred scheme of the embodiment, the first four-way pipe pressing plate 11 and the second four-way pipe pressing plate 12 are fixed on the first air conveying pipe 41 and the third air conveying pipe 46 through bolts 45 in a threaded manner, the corrosion-resistant layer 13 plays a role in corrosion resistance, and the sealing elastic lining 14 plays a role in sealing and gas-proof discharging.
As shown in fig. 1, the pipeline gas transmission device 3 comprises a first discharge assembly 31, the first discharge assembly 31 and a second discharge assembly 33 are identical in structure, the second discharge assembly 33 and the first discharge assembly 31 are communicated through a temporary gas transmission pipe 32 and used for transmitting gas, the pipeline gas transmission device 3 comprises the first discharge assembly 31, the first discharge assembly 31 comprises a sandwich valve body 311, the first discharge assembly 31 and the plugging hydraulic machine 312 are detached and installed, and the plugging hydraulic machine 312 is transplanted to other positions for use in the later period.
Specifically, the first discharge assembly 31 and the second discharge assembly 33 are symmetrically arranged about the central axis of the second gas pipe 44, the temporary gas pipe 32 is connected between the first discharge assembly 31 and the second discharge assembly 33 in a threaded manner, and the temporary gas pipe can be directly detached in the later period.
In the preferred scheme of this embodiment, the gas in the first gas-supply pipe 41 passes through four-way pipe subassembly 1 and gets into sandwich valve body 311, and during the shutoff hydraulic press 312 on the sandwich valve body 311 got into interim gas-supply pipe 32, the gas got into second discharge assembly 33 through interim gas-supply pipe 32, and in the gas got into third gas-supply pipe 46 through second discharge assembly 33 at last, guarantee that the gas is normally supplied with, under the circumstances of not stopping defeated, temporary or permanent solution incident, improve the safety of pipeline maintenance, improve the economic benefits of enterprise.
As shown in fig. 1, the rush-repair dredging assembly 4 comprises a first air pipe 41, a second flange 42 is welded to one ends, close to a second air pipe 44, of the first air pipe 41 and one end, close to the second air pipe 44, of a third air pipe 46, a third flange 43 is welded to two ends of the second air pipe 44, the second flange 42 is detachably mounted on the third flange 43 through bolts 45, and a rubber sealing gasket 2 between the second flange 42 and the third flange 43 is sealed to prevent gas leakage.
Specifically, the first gas pipe 41, the second gas pipe 44 and the third gas pipe 46 are arranged coaxially in a common horizontal direction, when a gas pipeline breaks down, quick emergency repair is firstly considered, online leakage stoppage of a high-pressure clamp is considered, a special sleeve is adopted for pipeline connection, a pipe climbing machine is used for cold cutting of the pipeline, and the like, so that safety accidents are temporarily or permanently solved.
In the preferred scheme of this embodiment, the air leakage position between the first air conveying pipe 41 and the third air conveying pipe 46 can be cut off under the auxiliary action of the pipe climbing machine, the two second flanges 42 are respectively welded on the first air conveying pipe 41 and the third air conveying pipe 46, the second flanges 42 are limited and fixed with the third flange 43 on the second air conveying pipe 44 through bolts 45, and the rubber sealing gasket 2 between the second flanges 42 and the third flange 43 plays a role in sealing and leakage prevention.
As shown in fig. 1, the auxiliary supporting assembly 5 includes a first limiting pressing plate 51, the first limiting pressing plate 51 is detachably mounted on a second limiting pressing plate 52 through a bolt 45, two sets of the first limiting pressing plate 51 and the second limiting pressing plate 52 are respectively clamped and fixed on the first air pipe 41 and the third air pipe 46, and the two sets of the first limiting pressing plate 51 and the second limiting pressing plate 52 support and limit the second air pipe 44 through a first screw 53, a second screw 54 and a nut 55.
Specifically, the first screw 53 is in threaded connection with the second screw 54, the first screw 53 and the second screw 54 are in threaded connection with the first limiting pressing plate 51 and the second limiting pressing plate 52, four sets of the first screw 53 and the second screw 54 are arranged, and the four sets of the first screw 53 and the second screw 54 are annularly distributed on the first limiting pressing plate 51 and the second limiting pressing plate 52.
In the preferred scheme of this embodiment, two sets of first limiting pressing plates 51 and second limiting pressing plates 52 are respectively clamped on the first air pipe 41 and the third air pipe 46, the first limiting pressing plates 51 are screwed on the second limiting pressing plates 52 through bolts 45, the first screws 53 are screwed on the second screws 54, and the mounted first screws 53 and second screws 54 penetrate through the threaded holes on the first limiting pressing plates 51 and the second limiting pressing plates 52 and are fixed through nuts 55, so that the auxiliary support assembly 5 can play an auxiliary support role for the second air pipe 44.
The working principle is as follows: when using this take good gas pipe of rubber seal gasket's leakproofness, switch on external power supply, can carry the gas in the first gas-supply pipe 41 to the third gas-supply pipe 46 under the auxiliary action of four-way pipe subassembly 1 and pipeline gas transmission device 3 in, guarantee the gas normal use, auxiliary stay subassembly 5 plays the auxiliary stay effect to salvageing mediation subassembly 4.
The terms "central," "longitudinal," "lateral," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientation or positional relationship indicated in the drawings for ease of description, but are not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the scope of the invention.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.
Claims (6)
1. The utility model provides a take gas pipe that rubber seal gasket's leakproofness is good, includes four-way pipe subassembly (1), and four-way pipe subassembly (1) centre gripping is spacing to be fixed on pipeline gas transmission device (3), runs through in four-way pipe subassembly (1) and salvagees mediation subassembly (4), salvagees and dismantles installation auxiliary stay subassembly (5) on mediation subassembly (4), its characterized in that, four-way pipe subassembly (1) includes first four-way pipe clamp plate (11), and first four-way pipe clamp plate (11) constitute through bolt (45) and second four-way pipe clamp plate (12) and dismantle mounting structure, and rubber seal gasket (2) that set up between first ring flange (15) on first four-way pipe clamp plate (11) and pipeline gas transmission device (3) prevent that the gas leaks.
2. The gas pipe with the rubber sealing gasket and good sealing performance as claimed in claim 1, is characterized in that: all set up corrosion-resistant layer (13) on first four-way pipe clamp plate (11) and second four-way pipe clamp plate (12), sealed elastic lining (14) that set up on corrosion-resistant layer (13) are sealed leak-proof to four-way pipe subassembly (1) and salvage mediation subassembly (4) junction.
3. The gas pipe with the rubber sealing gasket and good sealing performance as claimed in claim 1, is characterized in that: pipeline gas transmission device (3) include first discharge assembly (31), and first discharge assembly (31) discharges subassembly (33) the same with the second structure, and second discharge assembly (33) and first discharge assembly (31) are used for carrying the gas through interim gas-supply pipe (32) intercommunication.
4. The gas pipe with the rubber sealing gasket and good sealing performance as claimed in claim 3, is characterized in that: pipeline gas transmission device (3) include first row of subassembly (31), and first row of subassembly (31) includes sandwich valve body (311), and first row of subassembly (31) is dismantled the installation with shutoff hydraulic press (312), and other positions are transplanted in the later stage and use in shutoff hydraulic press (312).
5. The gas pipe with the rubber sealing gasket and good sealing performance as claimed in claim 1, is characterized in that: salvage mediation subassembly (4) and include first gas-supply pipe (41), first gas-supply pipe (41) and third gas-supply pipe (46) are close to the one end of second gas-supply pipe (44) and all weld second flange dish (42), second gas-supply pipe (44) both ends all weld third flange dish (43), third flange dish (43) are through bolt (45) dismantlement installation second flange dish (42), rubber seal gasket (2) between second flange dish (42) and third flange dish (43) are sealed, prevent that the gas from revealing.
6. The gas pipe with the rubber sealing gasket and good sealing performance as claimed in claim 1, is characterized in that: the auxiliary supporting assembly (5) comprises a first limiting pressing plate (51), the first limiting pressing plate (51) is detached and installed with a second limiting pressing plate (52) through bolts (45), two groups of first limiting pressing plates (51) and the second limiting pressing plates (52) are respectively clamped and fixed on a first air conveying pipe (41) and a third air conveying pipe (46), and two groups of first limiting pressing plates (51) and the second limiting pressing plates (52) support and limit a second air conveying pipe (44) through a first screw rod (53), a second screw rod (54) and a nut (55).
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202222221534.XU CN218671151U (en) | 2022-08-23 | 2022-08-23 | Gas pipe with rubber sealing gasket and good sealing performance |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202222221534.XU CN218671151U (en) | 2022-08-23 | 2022-08-23 | Gas pipe with rubber sealing gasket and good sealing performance |
Publications (1)
Publication Number | Publication Date |
---|---|
CN218671151U true CN218671151U (en) | 2023-03-21 |
Family
ID=85555687
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN202222221534.XU Active CN218671151U (en) | 2022-08-23 | 2022-08-23 | Gas pipe with rubber sealing gasket and good sealing performance |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN218671151U (en) |
-
2022
- 2022-08-23 CN CN202222221534.XU patent/CN218671151U/en active Active
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN101862883A (en) | Fuel gas pipeline leakage pressurized blocking welding method | |
CN101338847A (en) | HDPE tube welding-free interpenetration inner liner pipe-repairing method | |
CN218671151U (en) | Gas pipe with rubber sealing gasket and good sealing performance | |
CN201327460Y (en) | Filling-up plate device for pipeline hydrotest | |
CN108980510B (en) | Online leakage blocking device and method for gas pipe network | |
CN1654149A (en) | Technique of covering, sealing and welding under pressure for combustion gas pipeline | |
CN215981433U (en) | Anchor ear weldable type fixture for high-pressure oil and gas pipeline leakage emergency | |
CN212056248U (en) | Anti-leakage threaded connection flange | |
CN112594468A (en) | Quick emergency repair connector for pipeline | |
CN212080470U (en) | Flange capable of adjusting connection angle | |
CN211976268U (en) | Water conservancy water and electricity construction fastening processing apparatus | |
CN216344665U (en) | Pressurized plugging clamp for leakage working condition of submarine pipeline | |
CN202769173U (en) | Pipe quick leaking stoppage device | |
CN201072004Y (en) | Clamping device of gas pipe for blocking leakage with gas | |
CN217356107U (en) | Leakage blocking device for leakage of pipeline sand holes, corrosion and welding defects | |
CN205278669U (en) | Instrument is salvageed on line to oil gas pipeline | |
CN215981435U (en) | High temperature resistant bell and spigot pipeline repairing device | |
CN214889716U (en) | Pipeline plugging device | |
CN218153021U (en) | Water supply pipe network plugging device that leaks | |
CN212178248U (en) | Quick repairing device for spot corrosion of heat distribution pipeline | |
CN218351206U (en) | Waterproof airtight block structure of electrical reservation household sleeve | |
CN212569068U (en) | Protective observation glass window for safety experiment of lithium ion battery | |
CN206305630U (en) | Repairing tool for oil collecting pipeline | |
CN218494468U (en) | Encircling sealing device for repairing and mending leakage of water supply pipe network | |
CN219963841U (en) | Straight-through indoor hydrant |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
GR01 | Patent grant | ||
GR01 | Patent grant |