CN109723127B - Nodular cast iron integral type drainage inspection shaft - Google Patents
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- CN109723127B CN109723127B CN201811591953.4A CN201811591953A CN109723127B CN 109723127 B CN109723127 B CN 109723127B CN 201811591953 A CN201811591953 A CN 201811591953A CN 109723127 B CN109723127 B CN 109723127B
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Abstract
The invention discloses a nodular cast iron integrated drainage inspection well, which relates to the technical field of drainage inspection wells and has the technical scheme that the inspection well comprises a well chamber, a vertically arranged well shaft arranged at the top of the well chamber, a well seat arranged at the top of the well shaft, a well cover arranged on the well seat and a plurality of connecting pipes which are arranged outside the well chamber and are respectively connected with buried pipelines; a connecting mechanism is arranged between the connecting pipe and the buried pipeline, and comprises a first flange fixedly connected to one end of the connecting pipe, which is far away from the well chamber, a first sealing ring fixedly connected in the first flange, a second flange fixedly connected to one end of the buried pipeline and a second sealing ring fixedly connected in the second flange; the first sealing ring is clamped with the second sealing ring. The invention solves the problem that the joint of the inspection well and the buried pipeline is easy to leak, and achieves the effect that the joint of the inspection well and the buried pipeline is not easy to leak.
Description
Technical Field
The invention relates to the technical field of drainage inspection wells, in particular to a nodular cast iron integrated drainage inspection well.
Background
The drainage inspection well is a pipe network converging junction which is connected with an urban underground pipe network, and is a workstation which is convenient for regular inspection, cleaning and dredging of pipelines and prevention of pipeline blockage. At present, the domestic drainage inspection wells are mostly brick inspection wells and reinforced concrete inspection wells (cast-in-place or assembled). Under brick and concrete inspection shaft main application town road, the inspection shaft well lid generally adopts nodular cast iron well lid, combined material well lid, reinforced concrete well lid etc..
However, the brick and reinforced concrete inspection shaft is connected with the buried pipeline, so that the problem of poor sealing is easy to occur, and the leakage occurs at the joint of the inspection shaft and the buried pipeline.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide the nodular cast iron integrated drainage inspection well which can better seal the joint of the inspection well and the buried pipeline, so that the possibility of leakage at the joint of the inspection well and the buried pipeline can be reduced.
In order to achieve the purpose, the invention provides the following technical scheme: a ductile cast iron integrated drainage inspection well comprises a well chamber, a well shaft, a well seat, a well cover and a plurality of connecting pipes, wherein the well shaft is arranged at the top of the well chamber and is vertically arranged, the well seat is arranged at the top of the well shaft, the well cover is arranged on the well seat, and the connecting pipes are arranged on the outer side of the well chamber and are respectively connected with buried pipelines; a connecting mechanism is arranged between the connecting pipe and the buried pipeline, and comprises a first flange fixedly connected to one end of the connecting pipe, which is far away from the well chamber, a first sealing ring fixedly connected in the first flange, a second flange fixedly connected to one end of the buried pipeline and a second sealing ring fixedly connected in the second flange; the first sealing ring is clamped with the second sealing ring.
By adopting the technical scheme, the first sealing ring is fixed on the first flange through waterproof glue, the second sealing ring is fixed on the second flange through waterproof glue, the first sealing ring is clamped on the second sealing ring, and the first flange and the second flange are fixedly connected through a plurality of bolts, so that the buried pipeline and the connecting pipe are connected together; the connecting pipe is sealed with the junction of the buried pipeline through the first sealing ring and the second sealing ring, because the first sealing ring and the second sealing ring both have elasticity, and the sealing ring can make the sealing ring generate great deformation by being directly connected with the flange, so compared with the connection of the sealing ring and the flange, the first sealing ring and the second sealing ring can be directly connected to enable the two to be attached more closely, and the possibility of leakage at the junction of the connecting pipe and the buried pipeline can be reduced.
The invention is further configured to: a plurality of spherical clamping blocks are uniformly distributed at one end of the first sealing ring along the circumferential direction of the first sealing ring, a plurality of spherical clamping grooves are formed at one end of the second sealing ring along the circumferential direction of the second sealing ring, and the plurality of spherical clamping blocks are correspondingly clamped with the plurality of spherical clamping grooves one by one; the diameter of the opening of the spherical clamping groove is smaller than the diameter of the maximum cross section of the spherical clamping block.
Through adopting above-mentioned technical scheme, through spherical fixture block and spherical clamping groove joint, can be with the restriction of spherical fixture block in spherical clamping groove, can make first sealing washer and second sealing washer laminating inseparabler like this, therefore can effectively prevent that water from leaking from the junction of connecting pipe and buried pipeline.
The invention is further configured to: one end of the first sealing ring is evenly provided with a plurality of cylindrical clamping blocks along the circumferential direction, one end of the second sealing ring is provided with a plurality of cylindrical clamping grooves along the circumferential direction, and the plurality of cylindrical clamping blocks are respectively in one-to-one corresponding clamping connection with the plurality of cylindrical clamping grooves.
Through adopting above-mentioned technical scheme, can increase the area of contact of first sealing washer and second sealing washer on the one hand, a plurality of cylindricality fixture blocks of on the other hand can form the barrier, can carry out effectual blockking to water like this, therefore can effectively prevent water from leaking from the junction of connecting pipe and buried pipeline.
The invention is further configured to: one end of the first sealing ring is sequentially provided with a plurality of sawtooth-shaped clamping blocks along the radial direction, one end of the second sealing ring is provided with a plurality of sawtooth-shaped clamping grooves along the circumferential direction, and the sawtooth-shaped clamping blocks are respectively in one-to-one corresponding clamping connection with the sawtooth-shaped clamping grooves.
Through adopting above-mentioned technical scheme, can increase the area of contact of first sealing washer and second sealing washer on the one hand, on the other hand a plurality of zigzag fixture blocks can block water layer upon layer, can effectively prevent like this that water from leaking from the junction of connecting pipe and buried pipeline.
The invention is further configured to: the terminal surface setting of spherical draw-in groove's one end protrusion second sealing washer just spherical draw-in groove comprises a plurality of elastic blocks, adjacent two set up between the elastic block and have the deformation groove.
By adopting the technical scheme, when the spherical clamping block is clamped with the spherical clamping groove, the spherical clamping block supports against the elastic block, and the elastic block is in a compressed state; after the spherical clamping block is clamped into the spherical clamping groove, the elastic block resets to press the spherical clamping block, so that the first sealing ring and the second sealing ring are connected more tightly.
The invention is further configured to: a first annular clamping groove for clamping a first sealing ring is formed in the first flange; and a second annular clamping groove used for clamping a second sealing ring is arranged in the second flange, and a plurality of abdicating grooves used for respectively placing the spherical clamping grooves are arranged in the second annular clamping groove.
Through adopting above-mentioned technical scheme, be convenient for like this on the one hand install first sealing washer on first flange and be convenient for install second sealing washer on the second flange, on the other hand can reduce the area that first sealing washer and second sealing washer are exposed to the outside to can make the distance between first flange and the second flange diminish, can reduce the impact force that first sealing washer and second sealing washer received like this, therefore can prolong the life of first sealing washer and second sealing washer.
The invention is further configured to: cylindrical magnets are arranged on each cylindrical clamping block and each cylindrical clamping groove.
Through adopting above-mentioned technical scheme, the magnet actuation on the cylindricality fixture block and on the cylindricality draw-in groove can make first sealing washer and the laminating of second sealing washer inseparabler, can further carry out effectual blockking to water like this.
The invention is further configured to: every all be provided with the holding tank on the cylindricality fixture block and on every cylindricality draw-in groove, the opening part of holding tank sets up elastic annular limit, the internal diameter on annular limit is less than the cross section diameter of magnet.
Through adopting above-mentioned technical scheme, be convenient for on the one hand install the magnet in cylindricality fixture block and the cylindricality draw-in groove, on the other hand can reduce losing of magnet, therefore is convenient for connect first sealing washer and second sealing washer.
The invention is further configured to: elastic cushion pads are arranged on the well seat below the well lid.
Through adopting above-mentioned technical scheme, when receiving great gravity on the well lid, can reduce the well lid to the pressure of well seat through the blotter, and then reduce the well seat to the pressure of pit shaft, can reduce the sinking possibility of inspection shaft emergence effectively like this.
The invention is further configured to: and an anti-falling net is detachably connected on the inner circumferential surface of the well seat below the well lid through bolts.
Through adopting above-mentioned technical scheme, prevent weighing down the net through setting up, can reduce the well lid on the one hand and fall to the indoor possibility of well, on the other hand when the well lid is lost, can reduce the pedestrian and fall to the indoor possibility of well, therefore can ensure pedestrian's life safety.
In summary, compared with the prior art, the invention has the following beneficial effects:
1. the first sealing ring is fixed on the first flange through waterproof glue, the second sealing ring is fixed on the second flange through waterproof glue, the first sealing ring is clamped on the second sealing ring, and the first flange and the second flange are fixedly connected through a plurality of bolts, so that the buried pipeline and the connecting pipe are connected together; the connecting part of the connecting pipe and the buried pipeline is sealed through the first sealing ring and the second sealing ring, and the first sealing ring and the second sealing ring have elasticity, and the sealing ring is directly connected with the flange to enable the sealing ring to deform greatly;
2. when the spherical clamping block is clamped with the spherical clamping groove, the spherical clamping block presses the elastic block, and the elastic block is in a compressed state; after the spherical clamping block is clamped into the spherical clamping groove, the elastic block resets to press the spherical clamping block, so that the first sealing ring and the second sealing ring are connected more tightly;
3. the magnets on the cylindrical clamping block and the cylindrical clamping groove are attracted, so that the first sealing ring and the second sealing ring can be attached more tightly, and water can be further effectively blocked.
Drawings
FIG. 1 is a partial cross-sectional view of a highlighted ladder of an embodiment;
FIG. 2 is an exploded view of a highlighted connection mechanism in one embodiment;
FIG. 3 is a schematic view of a first ring slot shown in a first embodiment;
FIG. 4 is a schematic diagram of a structure of a protruding ball slot according to an embodiment;
FIG. 5 is an exploded view of the cylindrical clamping block and the cylindrical clamping groove shown in the second embodiment;
FIG. 6 is a schematic view showing the structure of a salient magnet according to a second embodiment;
FIG. 7 is an enlarged view of a portion of FIG. 6 at A;
FIG. 8 is an exploded view of the three embodiments of the present invention showing the saw-tooth shaped cartridges and the saw-tooth shaped slots.
In the figure: 1. burying a pipeline; 2. a well chamber; 3. a wellbore; 31. a well base; 32. a well cover; 33. a connecting pipe; 34. a cushion pad; 35. the anti-falling net; 36. climbing a ladder; 4. a connecting mechanism; 41. a first flange; 411. a first ring-shaped card slot; 42. a first seal ring; 421. a spherical fixture block; 422. a cylindrical fixture block; 423. a sawtooth-shaped fixture block; 43. a second flange; 431. a second annular card slot; 4311. a yielding groove; 44. a second seal ring; 441. a spherical clamping groove; 4411. an elastic block; 4412. a deformation groove; 4413. a through hole; 442. a cylindrical clamping groove; 443. a sawtooth-shaped clamping groove; 5. a magnet; 6. accommodating grooves; 61. and an annular edge.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings. In which like parts are designated by like reference numerals. It should be noted that the terms "front," "back," "left," "right," "upper" and "lower" used in the following description refer to directions in the drawings, and the terms "bottom" and "top," "inner" and "outer" refer to directions toward and away from, respectively, the geometric center of a particular component.
The first embodiment is as follows: a ductile cast iron integrated drainage inspection well is shown in figure 1 and comprises a well chamber 2, a well shaft 3 which is arranged at the top of the well chamber 2 and is vertically arranged, a well seat 31 which is arranged at the top of the well shaft 3, a well cover 32 which is arranged on the well seat 31 and a plurality of connecting pipes 33 which are arranged at the outer side of the well chamber 2 and are respectively connected with a buried pipeline 1; a connecting mechanism 4 is arranged between the connecting pipe 33 and the buried pipeline 1.
As shown in figure 1, the elastic buffer pads 34 are arranged on the well seat 31 below the well lid 32, when the well lid 32 is subjected to larger gravity, the pressure of the well lid 32 on the well seat 31 can be reduced through the buffer pads 34, and then the pressure of the well seat 31 on the shaft 3 is reduced, so that the possibility of sinking of the inspection well can be effectively reduced. The below of well lid 32 can be dismantled through the bolt and be connected with on the inner peripheral surface of well seat 31 and prevent weighing down net 35, prevents weighing down net 35 through setting up, can reduce the possibility that well lid 32 fell to well room 2 on the one hand, and on the other hand when well lid 32 lost, can reduce the possibility that the pedestrian fell to well room 2 in, therefore can ensure pedestrian's life safety. A ladder stand 36 is provided in the shaft 3 to facilitate access to the well 2 by inspection personnel.
As shown in fig. 2 and 3, the connection mechanism 4 includes a first flange 41 fixedly connected to an end of the connection pipe 33 away from the well 2, a first sealing ring 42 fixedly connected to an inside of the first flange 41, a second flange 43 fixedly connected to an end of the buried pipeline 1, and a second sealing ring 44 fixedly connected to an inside of the second flange 43; a first annular clamping groove 411 for clamping the first sealing ring 42 is formed in the first flange 41; a second annular clamping groove 431 for clamping the second sealing ring 44 is formed in the second flange 43; the first seal ring 42 is snap-fitted to the second seal ring 44. Fixing the first sealing ring 42 to the first ring-shaped clamping groove 411 through waterproof glue, fixing the second sealing ring 44 to the second ring-shaped clamping groove 431 through waterproof glue, clamping the first sealing ring 42 to the second sealing ring 44, and finally fixedly connecting the first flange 41 and the second flange 43 through a plurality of bolts, so that the buried pipeline 1 and the connecting pipe 33 are connected together; the junction of the connecting pipe 33 and the buried pipeline 1 is sealed through the first sealing ring 42 and the second sealing ring 44, because the first sealing ring 42 and the second sealing ring 44 both have elasticity, and the sealing ring can be greatly deformed by being directly connected with a flange, so compared with the connection of the sealing ring and the flange, the direct connection of the first sealing ring 42 and the second sealing ring 44 can enable the two to be attached more closely, so that the possibility of leakage at the junction of the connecting pipe 33 and the buried pipeline 1 can be reduced.
As shown in fig. 2 and 4, a plurality of spherical clamping blocks 421 are uniformly distributed at one end of the first sealing ring 42 along the circumferential direction thereof, a plurality of spherical clamping grooves 441 are formed at one end of the second sealing ring 44 along the circumferential direction thereof, and the plurality of spherical clamping blocks 421 are correspondingly clamped with the plurality of spherical clamping grooves 441 one by one; a plurality of through holes 4413 which are respectively in one-to-one correspondence with the spherical clamping grooves 441 and used for the spherical clamping blocks 421 to pass through are formed in the second sealing ring 44, the plurality of through holes 4413 are respectively in one-to-one correspondence communication with the plurality of spherical clamping grooves 441, the diameter of each through hole 4413 is larger than the maximum cross section diameter of the spherical clamping block 421, and the diameter of the opening of each spherical clamping groove 441 is smaller than the maximum cross section diameter of the spherical clamping block 421; a plurality of abdicating grooves 4311 for placing the spherical clamping grooves 441 respectively are arranged in the second annular clamping groove 431, one end of each spherical clamping groove 441 protrudes out of the end face of the second sealing ring 44, each spherical clamping groove 441 consists of a plurality of elastic blocks 4411, a deformation groove 4412 is arranged between every two adjacent elastic blocks 4411, and each elastic block 4411 can be a rubber block. When the spherical clamping block 421 is clamped with the spherical clamping groove 441, the spherical clamping block 421 presses the elastic block 4411, and at the moment, the elastic block 4411 is in a compressed state; after the spherical clamping block 421 is clamped into the spherical clamping groove 441, the elastic block 4411 is reset to press the spherical clamping block 421, so that the first sealing ring 42 and the second sealing ring 44 are connected more tightly, and water leakage from the joint of the connecting pipe 33 and the buried pipeline 1 can be effectively prevented.
The installation mode of this nodular cast iron integral type drainage inspection shaft is as follows:
fixing the first sealing ring 42 to the first ring-shaped clamping groove 411 through waterproof glue, fixing the second sealing ring 44 to the second ring-shaped clamping groove 431 through waterproof glue, clamping the first sealing ring 42 to the second sealing ring 44, and finally fixedly connecting the first flange 41 and the second flange 43 through a plurality of bolts, so that the buried pipeline 1 and the connecting pipe 33 are connected together; after buried pipeline 1 and connecting pipe 33 fixed connection, cover buried pipeline 1 and inspection shaft through soil or concrete, then with well lid 32 expose to ground can.
Example two: a ductile cast iron integrated drainage manhole, as shown in fig. 5 and 6, mainly differs from the first embodiment in that: a plurality of cylindrical clamping blocks 422 are uniformly distributed at one end of the first sealing ring 42 along the circumferential direction, a plurality of cylindrical clamping grooves 442 are formed at one end of the second sealing ring 44 along the circumferential direction, and the plurality of cylindrical clamping blocks 422 are correspondingly clamped with the plurality of cylindrical clamping grooves 442 one by one; cylindrical magnets 5 are arranged on each cylindrical clamping block 422 and each cylindrical clamping groove 442, and the magnets 5 on the cylindrical clamping blocks 422 and the magnets 5 on the cylindrical clamping grooves 442 can attract each other. By arranging the plurality of cylindrical clamping blocks 422 and the plurality of cylindrical clamping grooves 442, on one hand, the contact area of the first sealing ring 42 and the second sealing ring 44 can be increased, and on the other hand, the plurality of cylindrical clamping blocks 422 can form a barrier, so that water can be effectively blocked, and water can be effectively prevented from leaking from the connection part of the connecting pipe 33 and the buried pipeline 1; by arranging the magnet 5, the first sealing ring 42 and the second sealing ring 44 can be attached more tightly, so that water can be further effectively blocked.
As shown in fig. 5 and 7, each cylindrical latch 422 and each cylindrical latch 442 are provided with a receiving groove 6, an opening of the receiving groove 6 is provided with an elastic annular edge 61, and an inner diameter of the annular edge 61 is smaller than a cross-sectional diameter of the magnet 5; when the magnet 5 is fitted into the housing groove 6 of the cylindrical notch 442, the magnet 5 can be pressed into the housing groove 6 by using a tool such as a pliers or a wrench. This facilitates, on the one hand, the installation of the magnet 5 in the cylindrical dog 422 and the cylindrical dog 442 and, on the other hand, the loss of the magnet 5, and thus the connection of the first seal 42 and the second seal 44.
Compared with the first embodiment, the advantages are that: by arranging the plurality of cylindrical clamping blocks 422 and the plurality of cylindrical clamping grooves 442, on one hand, the contact area of the first sealing ring 42 and the second sealing ring 44 can be increased, and on the other hand, the plurality of cylindrical clamping blocks 422 can form a barrier, so that water can be effectively blocked, and water can be effectively prevented from leaking from the connection part of the connecting pipe 33 and the buried pipeline 1; by arranging the magnet 5, the first sealing ring 42 and the second sealing ring 44 can be attached more tightly, so that water can be further effectively blocked.
Example three: a ductile cast iron integrated drainage inspection well is shown in FIG. 8, and the main difference from the second embodiment is that: one end of the first sealing ring 42 is sequentially provided with a plurality of zigzag clamping blocks 423 along the radial direction, one end of the second sealing ring 44 is provided with a plurality of zigzag clamping grooves 443 along the circumferential direction, and the zigzag clamping blocks 423 are correspondingly clamped with the zigzag clamping grooves 443 one to one. Therefore, on one hand, the contact area of the first sealing ring 42 and the second sealing ring 44 can be increased, and on the other hand, the plurality of zigzag fixture blocks 423 can block water layer by layer, so that water leakage from the connection part of the connecting pipe 33 and the buried pipeline 1 can be effectively prevented.
Compared with the embodiment, the advantages are as follows: the plurality of zigzag fixture blocks 423 can block water layer by layer, so that water leakage from the connection part of the connection pipe 33 and the buried pipeline 1 can be effectively prevented.
The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.
Claims (3)
1. The utility model provides a nodular cast iron integral type drainage inspection shaft which characterized in that: the underground pipeline underground; a connecting mechanism (4) is arranged between the connecting pipe (33) and the buried pipeline (1), and the connecting mechanism (4) comprises a first flange (41) fixedly connected to one end, far away from the well chamber (2), of the connecting pipe (33), a first sealing ring (42) fixedly connected in the first flange (41), a second flange (43) fixedly connected to one end of the buried pipeline (1) and a second sealing ring (44) fixedly connected in the second flange (43); the first sealing ring (42) is clamped with the second sealing ring (44), a plurality of spherical clamping blocks (421) are uniformly distributed at one end of the first sealing ring (42) along the circumferential direction of the first sealing ring, a plurality of spherical clamping grooves (441) are formed at one end of the second sealing ring (44) along the circumferential direction of the second sealing ring, and the plurality of spherical clamping blocks (421) are correspondingly clamped with the plurality of spherical clamping grooves (441) one by one; the diameter of the opening of the spherical clamping groove (441) is smaller than the maximum cross section diameter of the spherical clamping block (421), one end of the spherical clamping groove (441) protrudes out of the end face of the second sealing ring (44), the spherical clamping groove (441) is composed of a plurality of elastic blocks (4411), a variable groove (4412) is arranged between every two adjacent elastic blocks (4411), and a first annular clamping groove (411) for clamping the first sealing ring (42) is formed in the first flange (41); be provided with second ring groove (431) that is used for supplying second sealing washer (44) joint in second flange (43), be provided with a plurality of grooves of stepping down (4311) that are used for placing spherical draw-in groove (441) respectively in second ring groove (431).
2. The spheroidal graphite cast iron integrated drainage inspection well of claim 1, wherein: elastic buffer pads (34) are arranged on the well seat (31) below the well cover (32).
3. The spheroidal graphite cast iron integrated drainage inspection well of claim 2, wherein: an anti-falling net (35) is detachably connected on the inner circumferential surface of the well seat (31) below the well lid (32) through bolts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811591953.4A CN109723127B (en) | 2018-12-25 | 2018-12-25 | Nodular cast iron integral type drainage inspection shaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811591953.4A CN109723127B (en) | 2018-12-25 | 2018-12-25 | Nodular cast iron integral type drainage inspection shaft |
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| Publication Number | Publication Date |
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| CN109723127A CN109723127A (en) | 2019-05-07 |
| CN109723127B true CN109723127B (en) | 2020-05-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811591953.4A Active CN109723127B (en) | 2018-12-25 | 2018-12-25 | Nodular cast iron integral type drainage inspection shaft |
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| CN (1) | CN109723127B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112627309A (en) * | 2020-12-21 | 2021-04-09 | 福建鑫远建工有限公司 | Assembly type inspection well chamber structure and construction method thereof |
| CN115788420A (en) * | 2022-12-26 | 2023-03-14 | 西南石油大学 | Device and method for simulating blockage of shaft by hydrate in gas production process |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE20023634U1 (en) * | 2000-02-25 | 2005-05-19 | Bode Gmbh | Device for sealing |
| CN203847861U (en) * | 2014-03-14 | 2014-09-24 | 张国然 | Flange assembly |
| CN204298851U (en) * | 2014-12-04 | 2015-04-29 | 康泰塑胶科技集团有限公司 | Plastic inspection well |
| CN204298852U (en) * | 2014-12-09 | 2015-04-29 | 云南农业大学 | A kind of light current manhole |
| CN206816133U (en) * | 2017-05-09 | 2017-12-29 | 广东粤辉建设工程有限公司 | A kind of aluminium door and window sealing device |
| CN207584227U (en) * | 2017-10-24 | 2018-07-06 | 江苏飞达不锈钢有限公司 | A kind of pipeline coupling flange with sealing ring |
| CN207394074U (en) * | 2017-10-27 | 2018-05-22 | 浙江联大锻压有限公司 | Valve deck |
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2018
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