CN219712394U - Direct-buried welding ball valve - Google Patents
Direct-buried welding ball valve Download PDFInfo
- Publication number
- CN219712394U CN219712394U CN202320165767.4U CN202320165767U CN219712394U CN 219712394 U CN219712394 U CN 219712394U CN 202320165767 U CN202320165767 U CN 202320165767U CN 219712394 U CN219712394 U CN 219712394U
- Authority
- CN
- China
- Prior art keywords
- connecting pipe
- valve
- ball valve
- outer sleeve
- valve body
- 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
- 238000003466 welding Methods 0.000 title claims abstract description 42
- 210000001503 joint Anatomy 0.000 claims abstract description 23
- 230000007246 mechanism Effects 0.000 claims abstract description 13
- 238000000034 method Methods 0.000 claims abstract description 6
- 238000009933 burial Methods 0.000 claims 6
- 230000003014 reinforcing effect Effects 0.000 abstract description 10
- 230000008569 process Effects 0.000 abstract description 5
- 238000009434 installation Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000002737 fuel gas Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Landscapes
- Valve Housings (AREA)
Abstract
The utility model discloses a direct-buried type welded ball valve which comprises a valve body, a valve rod, an opening and closing piece, a hand wheel, a connecting pipe, a butt joint reinforcing structure and a height adjusting mechanism. According to the utility model, the butt joint reinforcing structure is arranged on the outer surface of the connecting pipe, the outer sleeve body and the inner sleeve body play a role in positioning the connecting pipe and the external pipeline in the same direction, so that the connecting pipe and the external pipeline are not easy to deviate in the welding process, the welding operation is facilitated, after the welding is finished, the outer sleeve body is welded and fixed on the surfaces of the connecting pipe and the external pipeline, so that the outer sleeve body covers the outer side of the welding position of the connecting pipe and the external pipeline, the stress is prevented from directly acting on the welding position, and the connection strength of the connecting pipe and the external pipeline is further enhanced.
Description
Technical Field
The utility model relates to the field of welded ball valves, in particular to a direct-buried welded ball valve.
Background
The welded ball valve is also a ball valve, can be buried underground directly without specially constructing a valve well for the welded ball valve, so that the engineering cost is reduced, the welded ball valve is connected to a pipeline system in a welding mode, and the valve body can evenly distribute pressure to the pipeline system, so that the sealing performance and the pressure resistance of the welded ball valve can be greatly improved, and the welded ball valve is widely applied to various pipeline equipment such as urban fuel gas, urban heat supply, petrochemical industry, shipbuilding, steel, pressure regulating stations, power plants and the like.
Chinese patent: CN201820021617.5 a direct-buried all-welded ball valve, including the ball valve body, the surface at both ends all is equipped with the expansion joint about the ball valve body, the bottom fixed mounting of ball valve body has the base, and the top of ball valve body is equipped with the fixed orifices, the middle part of ball valve body inner chamber is equipped with the spheroid, the through-hole has been seted up to spheroidal side, spheroidal top welding has the valve rod, the valve rod is kept away from spheroidal one end and is run through and extend the outside of fixed orifices, and spheroidal side fixed mounting has the disk seat with ball valve body fixed connection, two symmetrical spouts have been seted up to the side of valve rod inner chamber. This direct-burried all-welded ball valve uses through the cooperation between valve rod, bracing piece and the bolt, has enlarged the length of valve rod, has further improved the practicality of ball valve, has avoided leading to the condition that needs to change the ball valve again because of valve rod length inadequately, and then has reduced the replacement cost.
In the installation process of the welded ball valve in the patent and the prior art, a section of pipeline needs to be intercepted on a pipeline, then the valve body is replaced and installed on the pipeline, unlike ground installation, the valve body and the underground pipeline are connected, welding operation needs to be carried out in an underground tunnel, the installation condition is severe, the welding difficulty is increased when the valve body and the external pipeline generate a height difference, the height of the valve body needs to be leveled by filling materials, in order to ensure that the valve body can be accurately butted with the external pipeline in the welding process, a positioning tool is needed to position and fix the valve body and the external pipeline, but the positioning tool is limited by the space environment in the tunnel, the installation difficulty of the positioning tool is large, the operation is complex, the welding position of the valve body and the external pipeline is a relatively weak part in the whole pipeline system, the fault rate is high in the whole pipeline system, and the connecting structure can be continuously perfected.
Disclosure of Invention
Therefore, in order to solve the defects, the utility model provides a direct-buried welding ball valve.
In order to achieve the above purpose, the present utility model adopts the following technical scheme: the utility model provides a directly bury formula welding ball valve, includes valve body, valve rod, headstock gear, hand wheel, connecting pipe, butt joint reinforced structure and high guiding mechanism, the valve rod is installed at the valve body top, the inboard middle part of valve body rotates and installs the headstock gear to the valve rod bottom is connected with the headstock gear, the hand wheel is installed in the rotation of valve rod top to the headstock gear is rotated by the hand wheel control, both ends all weld the connecting pipe around the valve body, the connecting pipe surface is provided with butt joint reinforced structure, the valve body bottom is provided with high guiding mechanism, butt joint reinforced structure includes outer sleeve body and interior sleeve body, connecting pipe surface cover is equipped with the overcoat body, be equipped with interior sleeve body on the overcoat body to interior sleeve body cover is located the connecting pipe surface.
Preferably, the butt joint reinforcing structure further comprises an annular groove, a first guide groove, a second guide groove and a protruding portion, the annular groove is formed in the inner sleeve body, the first guide groove is formed in the left wall of the outer sleeve body, the first guide groove head end is communicated with the annular groove, the second guide groove is formed in the right wall of the outer sleeve body, the head end of the second guide groove is communicated with the annular groove, and the protruding portion is welded on the outer surface of the connecting pipe.
Preferably, an observation window is arranged between the outer sleeve body and the inner sleeve body, and the observation windows are symmetrically distributed along the two sides of the surfaces of the outer sleeve body and the inner sleeve body.
Preferably, the annular groove is a closed ring shape, and the viewing window corresponds to the position of the end of the connection pipe when the boss is inside the annular groove.
Preferably, the outer sleeve is fully retracted into the connecting tube surface when the boss is at the end of the first guide slot.
Preferably, when the boss is located at the end of the second guide groove, half of the length of the outer sleeve extends beyond the surface of the connecting tube.
Preferably, the height adjusting mechanism comprises a support, a base, a thread bush and a threaded rod, wherein the support is sleeved on the outer surface of the valve body, the base is arranged below the support, the thread bush is arranged at the bottom of the valve body, the threaded rod is fixed on the top surface of the base, and the thread bush is sleeved on the surface of the threaded rod and is in threaded connection with the threaded rod.
The utility model has the beneficial effects that:
according to the utility model, the butt joint reinforcing structure is arranged on the outer surface of the connecting pipe, the outer sleeve body and the inner sleeve body play a role in positioning the connecting pipe and the external pipeline in the same direction, so that the connecting pipe and the external pipeline are not easy to deviate in the welding process, the welding operation is facilitated, after the welding is finished, the outer sleeve body is welded and fixed on the surfaces of the connecting pipe and the external pipeline, so that the outer sleeve body covers the outer side of the welding position of the connecting pipe and the external pipeline, the stress is prevented from directly acting on the welding position, and the connection strength of the connecting pipe and the external pipeline is further enhanced.
According to the utility model, the height adjusting mechanism is arranged at the bottom of the valve body, and the threaded rod is screwed in or out of the inner side of the threaded sleeve by controlling the threaded sleeve at the bottom of the valve body to rotate, so that the distance between the support and the base is adjusted, the height of the valve body can be finely adjusted, the height of the connecting pipe can be consistent with the height of the external pipeline, and the welding work can be normally performed.
Drawings
FIG. 1 is a schematic diagram of the structure of the present utility model;
FIG. 2 is a schematic view of the opening and closing member structure of the present utility model;
FIG. 3 is a schematic view of the outer casing of the present utility model after removal;
FIG. 4 is a schematic view of the front structure of the outer casing of the present utility model;
FIG. 5 is a schematic view of the back structure of the outer casing of the present utility model;
FIG. 6 is a schematic view of the right-side cross-sectional structure of the outer casing of the present utility model;
FIG. 7 is a schematic view of a left-hand cross-sectional structure of an outer casing of the present utility model;
FIG. 8 is a schematic view of the position of the outer sleeve of the present utility model with the boss inside the annular groove;
FIG. 9 is a schematic view of the position of the outer sleeve of the present utility model with the boss at the end of the second guide slot;
fig. 10 is a schematic view of the structure of the height adjusting mechanism of the present utility model after being disassembled.
Wherein: the valve comprises a valve body-1, a valve rod-2, an opening and closing part-3, a hand wheel-4, a connecting pipe-5, a butt joint reinforcing structure-6, an outer sleeve body-61, an inner sleeve body-62, an annular groove-63, a first guide groove-64, a second guide groove-65, a protruding part-66, an observation window-67, a height adjusting mechanism-7, a support-71, a base-72, a thread bush-73 and a threaded rod-74.
Detailed Description
In order to further explain the technical scheme of the utility model, the following is explained in detail through specific examples.
Referring to fig. 1-2, the utility model provides a direct-buried welding ball valve, which comprises a valve body 1, a valve rod 2, an opening and closing member 3, a hand wheel 4, a connecting pipe 5, a butt joint reinforcing structure 6 and a height adjusting mechanism 7, wherein the valve rod 2 is installed at the top of the valve body 1, the opening and closing member 3 is rotatably installed in the middle of the inner side of the valve body 1, the bottom end of the valve rod 2 is connected with the opening and closing member 3, the hand wheel 4 is rotatably installed at the top of the valve rod 2, the opening and closing member 3 is controlled to rotate by the hand wheel 4, the connecting pipes 5 are welded at the front end and the rear end of the valve body 1, the butt joint reinforcing structure 6 is arranged on the outer surface of the connecting pipe 5, and the height adjusting mechanism 7 is arranged at the bottom of the valve body 1.
Referring to fig. 3-9, the butt joint reinforcing structure 6 of the present utility model includes an outer sleeve 61 and an inner sleeve 62, the outer surface of the connecting pipe 5 is sleeved with the outer sleeve 61, one end of the outer sleeve 61 close to the valve body 1 is provided with the inner sleeve 62 with the same inner diameter dimension, and the inner sleeve 62 is also sleeved with the outer surface of the connecting pipe 5, wherein the outer sleeve 61 can play a role in positioning, and the outer sleeve 61 is sleeved on the connecting pipe 5 and the external pipe at the same time, so that the connecting pipe 5 and the external pipe are kept in a butt joint state, which is beneficial to welding operation.
Further, the butt joint reinforcing structure 6 further includes an annular groove 63, a first guide groove 64, a second guide groove 65 and a protruding portion 66, the annular groove 63 is formed in the inner wall surface of the inner sleeve body 62, the first guide groove 64 is horizontally arranged on the left wall surface inside the outer sleeve body 61, the head end of the first guide groove 64 is mutually communicated with the annular groove 63, the second guide groove 65 is horizontally arranged on the right wall surface inside the outer sleeve body 61, the head end of the second guide groove 65 is mutually communicated with the annular groove 63, the length of the second guide groove 65 is smaller than that of the first guide groove 64, the protruding portion 66 for matching with the annular groove 63, the first guide groove 64 and the second guide groove 65 is welded on the outer surface of the connecting pipe 5, and the effect of limiting the sliding distance of the outer sleeve body 61 is achieved.
Further, an observation window 67 is provided between the outer sleeve 61 and the inner sleeve 62, and the observation windows 67 are symmetrically distributed along two sides of the surfaces of the outer sleeve 61 and the inner sleeve 62, and after the outer sleeve 61 is sleeved on the connecting pipe 5 and the external pipeline at the same time, constructors can weld the butt joint of the connecting pipe 5 and the external pipeline together through the observation windows 67.
Further, the annular groove 63 is a closed ring, and when the protruding portion 66 is located inside the annular groove 63, the observation window 67 corresponds to the position of the end of the connecting pipe 5, and when the protruding portion 66 enters the annular groove 63, the inner sleeve 62 can freely rotate on the surface of the connecting pipe 5, so that the direction of the observation window 67 is adjusted, and no dead angle is generated when the connecting pipe 5 is welded with an external pipeline.
Further, by way of illustration, when the boss 66 is on the end of the first guide groove 64, the outer sleeve 61 is fully retracted into the surface of the connecting tube 5, ensuring that the outer sleeve 61 does not interfere with the interface of the connecting tube 5 with the external conduit.
Further, when the protruding portion 66 is located at the end of the second guiding groove 65, half of the length of the outer sleeve 61 extends out of the surface of the connecting pipe 5, so that the outer sleeve 61 can be simultaneously sleeved on the surface of the connecting pipe 5 and the surface of the external connecting pipe, the outer sleeve 61 is ensured to cover the outer surface of the welding portion of the connecting pipe 5 and the external connecting pipe, stress is prevented from directly acting on the welding portion, and connection strength of the connecting pipe 5 and the external connecting pipe is further enhanced.
Referring to fig. 10, the height adjusting mechanism 7 of the present utility model includes a support 71, a base 72, a threaded sleeve 73 and a threaded rod 74, wherein the support 71 is sleeved and fixed at the front and rear ends of the surface of the valve body 1, the base 72 is disposed under the support 71, the base 72 is slidably connected with a groove at the bottom of the support 71 through a pillar at a corner of the top, the threaded sleeve 73 is rotatably mounted at the bottom of the valve body 1, the threaded rod 74 is welded and fixed at the center of the top surface of the base 72, and the threaded sleeve 73 is sleeved on the surface of the threaded rod 74 and is in threaded connection with the threaded rod 74.
The working principle is as follows:
first, before installing the valve body 1, the position of the outer casing 61 needs to be adjusted first, so that the outer casing 61 is in butt joint with the boss 66 through the first guide groove 64, and because the length of the first guide groove 64 is enough, the outer casing 61 can be completely retracted to the surface of the connecting pipe 5 without being limited by the boss 66, and after the outer casing 61 is completely retracted to the surface of the connecting pipe 5, the butt joint of the connecting pipe 5 and an external pipeline is not hindered.
Secondly, when the valve body 1 is required to be installed on an underground pipeline, a section of pipeline is firstly cut off on the pipeline, then the valve body 1 is replaced and installed on the pipeline, if the height difference between the valve body 1 and an external pipeline is large, a filler is required to be filled under the base 72 to fill up the height of the valve body 1, then the threaded sleeve 73 at the bottom of the valve body 1 is controlled to rotate, so that the threaded rod 74 is screwed into or screwed out of the inner side of the threaded sleeve 73, the distance between the support 71 and the base 72 is adjusted, fine adjustment can be realized on the height of the valve body 1, the height of the connecting pipe 5 and the height of the external pipeline can be kept consistent, and normal welding work can be ensured.
Thirdly, before welding operation, in order to ensure that the connecting pipe 5 and the external pipeline are always kept in a butt joint state, the position of the outer sleeve body 61 needs to be adjusted, the outer sleeve body 61 is firstly slid outwards along the surface of the connecting pipe 5, the outer sleeve body 61 is sleeved on the surface of the external pipeline, the inner sleeve body 62 is sleeved on the surface of the connecting pipe 5, at the moment, the outer sleeve body 61 and the inner sleeve body 62 play a role in positioning the connecting pipe 5 and the external pipeline in the same direction, so that the connecting pipe 5 and the external pipeline are not easy to deviate in the welding process, and the welding operation is facilitated.
Fourth, when the welding operation is performed, the observation window 67 is arranged between the outer sleeve body 61 and the inner sleeve body 62, constructors can weld the butt joint position of the connecting pipe 5 and the external pipeline together through the observation window 67, and the protruding portion 66 is located in the annular groove 63 at the moment, and the annular groove 63 is in a closed annular shape, so that the inner sleeve body 62 can freely rotate on the surface of the connecting pipe 5 at the moment, the direction of the observation window 67 is adjusted, and no dead angle is generated when the connecting pipe 5 and the external pipeline are welded.
Fifth, after the welding is completed, the inner sleeve 62 is rotated to make the second guide groove 65 and the direction of the protruding portion 66 coincide, then the outer sleeve 61 is moved to make the second guide groove 65 and the protruding portion 66 butt-joint, because the length of the second guide groove 65 is shorter, the outer sleeve 61 cannot be completely retracted into the surface of the connecting pipe 5, at this time, half of the outer sleeve 61 is sleeved on the surface of the connecting pipe 5, the other half is sleeved on the external connecting pipe, and then the outer sleeve 61 is welded and fixed on the surfaces of the connecting pipe 5 and the external connecting pipe, so that the outer sleeve 61 covers the outer side of the welding position of the connecting pipe 5 and the external connecting pipe, the stress is prevented from directly acting on the welding position, and the connection strength of the connecting pipe 5 and the external connecting pipe is further enhanced.
Sixth, after the installation is accomplished, valve body 1 can bury underground with underground pipeline together, need not to build the valve well, ensure valve rod 2 can stretch to subaerial can, in the use, can control the state of opening and close of piece 3 through the hand wheel 4 of rotatory valve rod 2 top to the circulation of medium in the control valve body 1.
The utility model provides a direct-buried welding ball valve, which is characterized in that a butt joint reinforcing structure 6 is arranged on the outer surface of a connecting pipe 5, an outer sleeve body 61 and an inner sleeve body 62 play a role in positioning the connecting pipe 5 and an external pipeline in the same direction, so that the connecting pipe 5 and the external pipeline are not easy to deviate in the welding process, the welding operation is facilitated, after the welding is finished, the outer sleeve body 61 is welded on the surfaces of the connecting pipe 5 and the external pipeline, the outer sleeve body 61 covers the outer side of the welding position of the connecting pipe 5 and the external pipeline, the stress is prevented from directly acting on the welding position, the connection strength of the connecting pipe 5 and the external pipeline is further enhanced, a height adjusting mechanism 7 is arranged at the bottom of the valve body 1, a threaded rod 74 is screwed into or screwed out of the inner side of the threaded sleeve 73 by controlling the threaded sleeve 73 at the bottom of the valve body 1, the distance between a support 71 and a base 72 is adjusted, the fine adjustment of the height of the valve body 1 can be realized, the height of the connecting pipe 5 and the external pipeline can be kept consistent, and the welding operation can be normally performed.
The foregoing is merely a preferred example of the present utility model, and the present utility model is not limited thereto, but it is to be understood that modifications and equivalents of some of the technical features described in the foregoing embodiments may be made by those skilled in the art, although the present utility model has been described in detail with reference to the foregoing embodiments. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.
Claims (7)
1. The utility model provides a direct-burried welding ball valve, includes valve body (1), valve rod (2), headstock gear (3), hand wheel (4) and connecting pipe (5), valve rod (2) are installed at valve body (1) top, valve body (1) inboard middle part rotates installs headstock gear (3) to valve rod (2) bottom is connected with headstock gear (3), hand wheel (4) are installed in valve rod (2) top rotation, and headstock gear (3) are rotated by hand wheel (4) control, both ends all weld connecting pipe (5) around valve body (1);
the method is characterized in that: still include butt joint reinforced structure (6) and high guiding mechanism (7), connecting pipe (5) surface is provided with butt joint reinforced structure (6), valve body (1) bottom is provided with high guiding mechanism (7), butt joint reinforced structure (6) are including overcoat body (61) and interior sleeve (62), connecting pipe (5) surface cover is equipped with overcoat body (61), be equipped with interior sleeve (62) on overcoat body (61) to interior sleeve (62) cover is located connecting pipe (5) surface.
2. The direct burial welded ball valve of claim 1, wherein: the butt joint reinforced structure (6) still includes ring channel (63), first guide way (64), second guide way (65) and bellying (66), interior sleeve body (62) inner wall is equipped with ring channel (63), the inside left wall of overcoat body (61) is equipped with first guide way (64) to first guide way (64) head end and ring channel (63) intercommunication, the inside right wall of overcoat body (61) is equipped with second guide way (65), and second guide way (65) head end and ring channel (63) intercommunication, connecting pipe (5) surface welding has bellying (66).
3. The direct burial welded ball valve of claim 2, wherein: an observation window (67) is arranged between the outer sleeve body (61) and the inner sleeve body (62), and the observation windows (67) are symmetrically distributed along the two sides of the surfaces of the outer sleeve body (61) and the inner sleeve body (62).
4. A direct burial welded ball valve as in claim 3 wherein: the annular groove (63) is closed annular, and when the boss (66) is located inside the annular groove (63), the observation window (67) corresponds to the position of the end of the connecting pipe (5).
5. The direct burial welded ball valve of claim 2, wherein: the outer sleeve (61) is fully retracted into the surface of the connection tube (5) when the boss (66) is located at the end of the first guide groove (64).
6. The direct burial welded ball valve of claim 2, wherein: when the protruding part (66) is positioned on the tail end of the second guide groove (65), half of the length of the outer sleeve body (61) extends out of the surface of the connecting pipe (5).
7. The direct burial welded ball valve of claim 1, wherein: the height adjusting mechanism (7) comprises a support (71), a base (72), a thread sleeve (73) and a threaded rod (74), the support (71) is sleeved on the outer surface of the valve body (1), the base (72) is arranged below the support (71), the thread sleeve (73) is arranged at the bottom of the valve body (1), the threaded rod (74) is fixed on the top surface of the base (72), and the thread sleeve (73) is sleeved on the surface of the threaded rod (74) and is in threaded connection with the threaded rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320165767.4U CN219712394U (en) | 2023-02-09 | 2023-02-09 | Direct-buried welding ball valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320165767.4U CN219712394U (en) | 2023-02-09 | 2023-02-09 | Direct-buried welding ball valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219712394U true CN219712394U (en) | 2023-09-19 |
Family
ID=87980895
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320165767.4U Active CN219712394U (en) | 2023-02-09 | 2023-02-09 | Direct-buried welding ball valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219712394U (en) |
-
2023
- 2023-02-09 CN CN202320165767.4U patent/CN219712394U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101260951A (en) | Deep water flange automatic connection nut aligning and screwing device | |
| CN219712394U (en) | Direct-buried welding ball valve | |
| CN105019910A (en) | Shield tail sealing device and shield tunneling machine | |
| CN114320258A (en) | Large-displacement fracturing split flow manifold pry capable of being rapidly butted | |
| CN103273178A (en) | Automatic welding device for transverse-position and narrow-gap gas metal arc welding | |
| CN114160776A (en) | Manufacturing method of full-protection hydraulic support upright column suitable for various media | |
| CN205600113U (en) | Automatic argon filling device of pipeline welding inner wall | |
| CN215000057U (en) | Be applied to flexible pipe of explosion-proof type on shield structure machine | |
| CN115138539A (en) | Glue injection repairing method and glue injection device for abnormal sound of distance tube of graphite tube heat exchanger | |
| CN205764400U (en) | Double torch welding tractors for petroleum pipeline welding | |
| CN208231047U (en) | A kind of airbag apparatus of gas-filled protective weldering | |
| CN209781828U (en) | Spraying water distribution control valve for hydraulic support of underground coal face of coal mine | |
| CN208564553U (en) | A kind of cutter head of shield machine freezing pipeline jointing construction | |
| CN112303335B (en) | Water conservancy pipeline salvagees and uses quick connect structure | |
| CN202137537U (en) | Horizontal centering regulator for mounting pipelines | |
| CN213089131U (en) | Slow impact device for electromagnetic valve | |
| CN220727136U (en) | Pneumatic butterfly valve convenient to installation | |
| CN217151908U (en) | Large-displacement fracturing split flow manifold pry capable of being rapidly butted | |
| CN213871132U (en) | High-temperature high-pressure balance stop valve | |
| CN213331091U (en) | Cabin penetrating piece device for shield machine air pressure cabin | |
| CN215522349U (en) | Sealed tight welding steel pipe | |
| CN202336648U (en) | Automatic welding device for freezing pipe joint | |
| CN209761892U (en) | High leakproofness hydraulic pressure valve | |
| CN218436849U (en) | Dust falling device for road engineering | |
| CN217894526U (en) | Tank car discharge gate interfacing apparatus |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |