CN213449333U - Auxiliary mounting tool for flanging prefabricated part of exhaust passage of residential kitchen and bathroom - Google Patents

Auxiliary mounting tool for flanging prefabricated part of exhaust passage of residential kitchen and bathroom Download PDF

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Publication number
CN213449333U
CN213449333U CN202022198456.7U CN202022198456U CN213449333U CN 213449333 U CN213449333 U CN 213449333U CN 202022198456 U CN202022198456 U CN 202022198456U CN 213449333 U CN213449333 U CN 213449333U
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internal thread
ring
sleeve
thread sleeve
outer circumferential
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CN202022198456.7U
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王周辉
胡波
赵建华
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Zhongjian Hoton Construction Group Co ltd
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Zhongjian Hoton Construction Group Co ltd
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Abstract

The utility model discloses a supplementary mounting tool of house kitchen guarding exhaust passage turn-ups prefabricated component, including the montant the tip of montant hypomere is rotated and is equipped with ring I, is in along the circumference of ring I it has a plurality of vaulting poles I to articulate on the outer circumferential wall of ring I slide on the montant and be equipped with internal thread sleeve I set up on the outer circumferential wall of montant hypomere with I screw-thread fit's of internal thread sleeve external screw thread I, be in along the circumference of internal thread sleeve I the outer circumferential wall of internal thread sleeve I articulates has a plurality of vaulting poles II that correspond with vaulting pole I, and every the middle part of vaulting pole II that all corresponds with it of middle part of vaulting pole I is articulated be equipped with II pivoted restriction subassemblies of restriction ring between the terminal surface that internal thread sleeve I is relative with ring II, has ensured to carry out the centering with the exhaust passage of vertical setting to the prefab.

Description

Auxiliary mounting tool for flanging prefabricated part of exhaust passage of residential kitchen and bathroom
Technical Field
The utility model relates to a building construction field specifically is supplementary mounting tool of house kitchen guarding exhaust passage turn-ups prefabricated component.
Background
The flue of a house refers to a vertical exhaust duct used for the house to exhaust oil smoke, cooking waste gas and ventilation technology in kitchens and toilets. The main exhaust duct used in the house at present is a duct vertically arranged in the integrated house and penetrating through each floor, which is used for collecting and intensively discharging the waste gas in a kitchen and a toilet of the floor, the prior art connects two exhaust ducts by cement or a prefabricated exhaust duct flanging prefabricated part through simple two butted exhaust ducts, and then seals the exhaust ducts by cement, although the fixing mode is simple, the sealing and firmness problems between flues are not considered, meanwhile, because the angle of an assembling part is usually a right angle, a gap appears at the joint of the two exhaust ducts, after the installation is finished, the oil smoke can not be well sealed when the house is used at home, thereby leading the oil smoke to be reversely filled, the existing installation mode is complex, when a constructor installs, the installation direction positions of a preformed hole of a floor slab and the exhaust ducts need to be checked firstly, and the central line is popped up, then, center lines are popped up on two sides of the vertical surface of the exhaust passage, the exhaust passage is aligned to the center lines when in place, the periphery of the exhaust passage is fixed by a woodwedge, the hanging lines are straightened, the upper exhaust passage and the lower exhaust passage are combined and coated with asphalt waterproof factice, then the bottom die is supported and the gap of the reserved hole is poured and tamped twice by C20 fine stone concrete to form a waterproof reversed opening which is 50mm higher than the floor surface, the installation positions of the exhaust passage and the flanging prefabricated component can be dislocated in the installation process of the exhaust passage and the flanging prefabricated component, and therefore the butting of the upper exhaust passage and the lower exhaust passage is.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the problem that above-mentioned background art provided, provide house kitchen guarding's exhaust passage turn-ups prefabricated component's supplementary mounting tool, can carry out the centering to prefab and exhaust passage when installing kitchen guarding's exhaust passage turn-ups prefab.
The purpose of the utility model is mainly realized through the following technical scheme:
supplementary mounting tool of house kitchen guarding's exhaust passage turn-ups prefabricated component, including the montant the tip of montant hypomere rotates and is equipped with ring I, along the circumference of ring I in it has a plurality of vaulting poles I to articulate on the outer circumferential wall of ring I, slide on the montant and be equipped with internal thread sleeve I, set up on the outer circumferential wall of montant hypomere with I screw-thread fit's of internal thread sleeve external screw thread I, along the circumference of internal thread sleeve I on the outer circumferential wall of internal thread sleeve I articulated have a plurality of vaulting poles II that correspond with vaulting pole I, and every the middle part of vaulting pole I all articulates with the middle part of the vaulting pole II that corresponds with it, the upper segment cover of montant is equipped with the sleeve rotates be equipped with ring II, along the circumference of ring II on the outer circumferential wall of ring II articulates there are a plurality of vaulting poles III, slide on the montant and be equipped with internal thread, set up on telescopic outer circumferential wall with II screw-thread fit's of internal thread sleeve external screw threads II, be in along the circumference of internal thread sleeve II outer circumferential wall on articulated have a plurality of vaulting poles IV that correspond with vaulting pole III, and every vaulting pole IV's middle part all articulates with the middle part of vaulting pole III that corresponds it be equipped with II pivoted restriction subassemblies of restriction ring between the terminal surface that internal thread sleeve I is relative with ring II.
The utility model aims to solve the problem that construction workers need to check the installation direction and the position of a floor preformed hole and an exhaust passage firstly when installing, pop up a central line, then also pop up the central line on both sides of the vertical surface of the exhaust passage, the exhaust passage is aligned to the central line when in place, the periphery is wedged and fixed by wood, a hanging wire is straightened, the upper exhaust passage and the lower exhaust passage are combined and coated with asphalt waterproof factice, then a bottom die is supported by C20 fine stone concrete for twice, the gap of the preformed hole is poured and compacted and is tamped into a waterproof reversed mouth which is 50mm higher than the floor surface, the construction period of the mode is greatly prolonged, the alignment of a prefabricated part and the joint of the upper exhaust passage and the lower exhaust passage cannot be ensured, so that cracks appear on the end part of the exhaust passage, the oil smoke is poured backwards due to the household;
the utility model discloses a be equipped with on the montant and be used for installing the auxiliary part that the prefabricated component was gone on to house kitchen guarding's exhaust passage turn-ups, we define exhaust passage turn-ups prefabricated component as the prefabricated component here, the utility model discloses at work, at first by the constructor place prefabricated exhaust passage turn-ups component at the opening part of the exhaust passage pipeline that has set up on the floor and has finished on nearly, constructor passes through the link structure who sets up on the montant earlier, fixes the montant in the exhaust passage pipeline of vertical setting, through rotating the tip of the montant hypomere and being equipped with ring I, along the circumference of ring I on the outer periphery of ring I articulates there are a plurality of vaulting poles I, slide on the montant and be equipped with internal thread sleeve I, set up the external screw thread I with internal thread sleeve I screw-thread fit on the outer periphery of montant hypomere, along internal thread sleeve I on the outer periphery of internal, the middle part of each support rod I is hinged with the middle part of a support rod II corresponding to the support rod I, the vertical rod is rotated on the circular ring I, the internal thread sleeve I in threaded fit moves towards the direction close to the circular ring I along the axial direction of the vertical rod, the support rods II corresponding to the support rods I and arranged between the circular ring I and the internal thread sleeve I are expanded, when the internal thread sleeve I moves on the vertical rod, the distance between the support rods II corresponding to the support rods I is gradually reduced, so that the vertical rod is fixed in the exhaust duct pipeline which is vertically arranged, the sleeve is sleeved at the upper section of the vertical rod, the circular ring II is rotatably arranged on the sleeve, the support rods III are hinged on the outer circumferential wall of the circular ring II along the circumferential direction of the circular ring II, the internal thread sleeve II is slidably arranged on the vertical rod, and an external thread II in threaded fit with the internal thread sleeve II is arranged on the outer circumferential wall of the sleeve, the inner wall of the prefabricated part is fixed, and therefore the alignment of the prefabricated part and the vertically arranged exhaust passage is guaranteed.
Furthermore, the limiting assembly comprises a plurality of limiting sleeves, each limiting sleeve is connected with the side wall of the circular ring II, a limiting rod is arranged in each limiting sleeve in a sliding mode, and the limiting rods penetrate through the limiting sleeves in a movable mode and then extend outwards to be connected with the outer wall of the internal thread sleeve I. Through being equipped with a plurality of restriction subassemblies at ring II between internal thread sleeve I, can make this device enable to realize moving at the sleeve motion, prevent that telescopic motion from receiving the restriction, cause this novel prefab to fix.
Furthermore, a plurality of nuts are arranged on the outer circumferential wall of the internal thread sleeve II along the circumferential direction of the internal thread sleeve II, a screw rod in threaded fit with each nut is arranged in each nut, a bearing is sleeved on the outer wall of each screw rod, and a horizontal plate is arranged on the outer ring of each bearing. Through the circumference at internal thread sleeve II be equipped with a plurality of nuts on internal thread sleeve II's the outer periphery wall, all be equipped with screw-thread fit's lead screw with it in every the cover is equipped with the bearing on the outer wall of lead screw, every all be equipped with the horizontal plate on the outer lane of bearing, through this kind of design can be when centering the exhaust passage of prefab and vertical setting, can also provide a holding down force to the prefab to the realization is better in the contact between prefab and the floor.
Further, rubber wheels are rotatably arranged on the end faces of the free ends of the support rods I, II, III and IV. Through every all rotate on the terminal surface of the free end of vaulting pole I, vaulting pole II, vaulting pole III, vaulting pole IV and be equipped with the rubber wheel, can protect the inner wall of prefab and the exhaust passage of vertical setting, prevent that the inner wall of prefab and the exhaust passage inner wall of vertical setting from cracking to lead to later stage resident family to take place the flue gas and flow backward when using.
Furthermore, an organ cover in a circular ring shape is sleeved on the internal thread sleeve I, and the free end of each support rod II is connected with the organ cover. Through be in the cover is equipped with the organ cover that is the ring on the internal thread sleeve I, every the free end of vaulting pole II all is connected with the organ cover, can prevent to lead to the fact pitch or waterproof oleamen or grit mud to fall into the exhaust passage when should scribble pitch or waterproof oleamen when combining prefabricated flange structure and exhaust passage to cause too much silt to fall into the exhaust passage bottom and cause later stage construction workman not convenient to clear up.
To sum up, compared with the prior art, the utility model has the following beneficial effects: the device is characterized in that a plurality of support rods IV corresponding to the support rods III are hinged to the outer circumferential wall of the inner threaded sleeve II along the circumferential direction of the inner threaded sleeve II, the middle of each support rod IV is hinged to the middle of the support rod III corresponding to the support rod IV, components arranged on the sleeve are consistent with the movement mode of a connecting rod component arranged on a vertical rod, so that the inner wall of the prefabricated part is fixed, the prefabricated part and a vertically arranged exhaust passage are aligned, the sleeve can move to realize the device through the arrangement of a plurality of limiting components between the ring II and the inner threaded sleeve I, the movement of the sleeve is prevented from being limited, the prefabricated part cannot be fixed, a plurality of nuts are arranged on the outer circumferential wall of the inner threaded sleeve II along the circumferential direction of the inner threaded sleeve II, and a lead screw matched with the nuts is arranged in each nut, every all the cover is equipped with the bearing on the outer wall of lead screw, every all be equipped with the horizontal plate on the outer lane of bearing, through this kind of design can be when centering with the exhaust passage of vertical setting to the prefab, can also provide a holding down force to the prefab to the realization is better to the contact between prefab and the floor.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. In the drawings:
fig. 1 is a front view of the present invention.
Fig. 2 is a schematic diagram of the specific structure of the present invention.
The names corresponding to the reference numbers in the drawings are as follows:
1-ring I, 2-stay II, 3-stay I, 4-limiting rod, 5-limiting sleeve, 6-sleeve, 7-stay III, 8-stay IV, 9-internal thread sleeve II, 10-vertical rod, 11-screw rod, 12-horizontal plate, 13-nut, 14-prefabricated part, 15-internal thread sleeve I, 16-floor slab, 17-exhaust passage, 18-rubber wheel, 19-ring II and 20-organ cover.
Detailed Description
To make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the following examples and drawings, and the exemplary embodiments and descriptions thereof of the present invention are only used for explaining the present invention, and are not intended as limitations of the present invention.
Example 1:
as shown in fig. 1-2, the embodiment includes a vertical rod 10, a circular ring i 1 is rotatably disposed at an end of a lower section of the vertical rod 10, a plurality of support rods i 3 are hinged on an outer circumferential wall of the circular ring i 1 along the circumferential direction of the circular ring i 1, an internal threaded sleeve i 15 is slidably disposed on the vertical rod 10, an external thread i in threaded fit with the internal threaded sleeve i 15 is disposed on the outer circumferential wall of the lower section of the vertical rod 10, a plurality of support rods ii 2 corresponding to the support rods i 3 are hinged on the outer circumferential wall of the internal threaded sleeve i 15 along the circumferential direction of the internal threaded sleeve i 15, the middle portion of each support rod i 3 is hinged to the middle portion of the support rod ii 2 corresponding to the support rod i 3, a sleeve 6 is sleeved on an upper section of the vertical rod 10, a circular ring ii 19 is rotatably disposed on the sleeve 6, a plurality of support rods iii 7 are hinged on the outer circumferential wall of the circular ring ii 19 along the, the montant 10 is gone up the slip and is equipped with internal thread sleeve II 9 set up on the outer circumferential wall of sleeve 6 with the external screw thread II of the II 9 screw-thread fit of internal thread sleeve, be in along the circumference of internal thread sleeve II 9 on the outer circumferential wall of internal thread sleeve II 9 articulated have a plurality of vaulting poles IV 8 that correspond with vaulting pole III 7, and every vaulting pole IV 8's middle part all articulates with the vaulting pole III 7's that corresponds it is equipped with restriction ring II 19 pivoted restriction subassembly between the relative terminal surface of internal thread sleeve I15 and ring II 19.
The utility model aims to solve the problem that when a construction worker installs, the installation direction and the position of a reserved hole of a floor slab 16 and an exhaust passage need to be checked firstly, a central line is popped up, then the central line is popped up on two sides of the vertical surface of the exhaust passage, the exhaust passage is aligned to the central line when in place, the periphery is wedged and fixed by wood, a hanging line is straightened, the upper exhaust passage and the lower exhaust passage are combined and coated with asphalt waterproof factice, then a bottom die is supported by C20 fine stone concrete to cast and compact a gap of the reserved hole twice and smash the gap into a waterproof reversed opening 50mm higher than the 16 surface of the floor slab, the greatly prolonged construction period of the mode can not ensure that a prefabricated part 14 is aligned with the joint of the upper exhaust passage and the lower exhaust passage 17, so that cracks appear on the end part of the exhaust passage 17, thereby causing the;
the utility model discloses a be equipped with on montant 10 and be used for installing the auxiliary part that 17 turn-ups prefabricated component of exhaust passage of house kitchen guarding are installed, here we define 17 turn-ups prefabricated component of exhaust passage as prefabricated component 14, the utility model discloses at work, at first by the constructor with prefabricated 17 turn-ups of exhaust passage component place the opening part of exhaust passage pipeline that has nearly set up on the floor and finish, constructor passes through the connecting rod structure who sets up on montant 10 earlier, fixes montant 10 in the exhaust passage pipeline of vertical setting, through the tip rotation of montant 10 hypomere is equipped with ring I1, along the circumference of ring I1 articulated on the outer periphery of ring I1 have a plurality of vaulting poles I3, slide on montant 10 and be equipped with female screw sleeve I15, set up on the outer periphery of montant 10 hypomere external screw thread I with female screw sleeve I15 screw-thread fit, a plurality of support rods II 2 corresponding to the support rods I3 are hinged to the outer circumferential wall of the inner threaded sleeve I15 along the circumferential direction of the inner threaded sleeve I15, the middle portion of each support rod I3 is hinged to the middle portion of the corresponding support rod II 2, the vertical rod 10 is rotated on the ring I1, the inner threaded sleeve I15 matched with threads moves in the direction close to the ring I1 along the axial direction of the vertical rod 10, the support rods II 2 corresponding to the support rods I3 and arranged between the ring I1 and the inner threaded sleeve I15 are expanded, when the inner threaded sleeve I15 moves on the vertical rod 10, the distance between the support rods II 2 corresponding to the support rods I3 is gradually reduced, the vertical rod 10 is fixed in a vertically arranged exhaust pipeline, the sleeve is sleeved on the upper section of the vertical rod 10, a ring II 19 is rotatably arranged on the sleeve, and a plurality of support rods III are hinged to the outer circumferential wall of the ring II 19 along the circumferential direction of the ring II 19, the montant 10 is gone up the slip and is equipped with internal thread sleeve II 9 set up on the telescopic outer circumferential wall with II 9 screw-thread fit's of internal thread sleeve external screw thread II, be in along the circumference of internal thread sleeve II 9 on the outer circumferential wall of internal thread sleeve II 9 articulated have a plurality of vaulting poles IV 8 that correspond with vaulting pole III 7, and every vaulting pole IV 8's middle part all is articulated with the middle part of vaulting pole III 7 that corresponds with it, and the subassembly that sets up on the sleeve again is unanimous with the motion mode of setting up the link assembly on montant 10 to the realization is fixed the inner wall of prefab 14, thereby has ensured carrying out the centering at the exhaust passage to prefab 14 and vertical setting.
Example 2
As shown in fig. 1 to 2, the present embodiment is further defined based on embodiment 1 as follows: this embodiment is in the restriction subassembly includes a plurality of stop collar 5, every stop collar 5 all is connected with the lateral wall of ring II 19, all slides in every stop collar 5 and is equipped with gag lever post 4, gag lever post 4 activity runs through the outer wall connection of extending outside and internal thread sleeve I15 behind the stop collar 5. Through being equipped with a plurality of restriction subassemblies at ring II 19 between internal thread sleeve I15, can make this device enable realizing at the sleeve motion messenger, prevent that telescopic motion from receiving the restriction, cause this novel prefab that can not fix.
Preferably, a plurality of nuts 13 are arranged on the outer circumferential wall of the inner threaded sleeve II 9 along the circumferential direction of the inner threaded sleeve II 9, a screw rod 11 in threaded fit with each nut 13 is arranged in each nut 13, a bearing is sleeved on the outer wall of each screw rod 11, and a horizontal plate 12 is arranged on the outer ring of each bearing. The plurality of nuts 13 are arranged on the outer circumferential wall of the inner threaded sleeve II 9 in the circumferential direction of the inner threaded sleeve II 9, the screw rods 11 in threaded fit with the nuts 13 are arranged in each nut 13, the outer wall of each screw rod 11 is sleeved with a bearing, and each horizontal plate 12 is arranged on the outer ring of each bearing.
Preferably, a rubber wheel 18 is rotatably arranged on the end face of the free end of each of the support rods I3, II 2, III 7 and IV 8. Through every all rotate on the terminal surface of the free end of vaulting pole I3, vaulting pole II 2, vaulting pole III 7, vaulting pole IV 8 and be equipped with rubber wheel 18, can protect the inner wall of prefab 14 and the exhaust passage 17 of vertical setting, prevent that the inner wall of prefab 14 and the exhaust passage 17 inner wall of vertical setting from cracking to lead to later stage resident family to take place the flue gas and flow backward when using.
Preferably, an organ cover 20 in a circular ring shape is sleeved on the internal thread sleeve I15, and the free end of each strut II 2 is connected with the organ cover 20. Through be in the cover is equipped with organ cover 20 that is the ring on the internal thread sleeve I15, every the free end of vaulting pole II 2 all is connected with organ cover 20, can prevent to lead to the fact pitch or waterproof oleamen or grit mud to fall into the exhaust duct when should scribble pitch or waterproof oleamen when combining prefabricated flange structure and exhaust duct to cause too much silt to fall into the exhaust duct bottom and cause later stage construction workman not convenient to clear up the exhaust duct.
The above-mentioned embodiments, further detailed description of the objects, technical solutions and advantages of the present invention, it should be understood that the above description is only the embodiments of the present invention, and is not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims (6)

1. Supplementary mounting tool of house kitchen guarding's exhaust passage turn-ups prefabricated component, its characterized in that includes montant (10) the tip of montant (10) hypomere is rotated and is equipped with ring I (1), is in along the circumference of ring I (1) articulated on the outer circumferential wall of ring I (1) have a plurality of vaulting poles I (3) slide on montant (10) and be equipped with internal thread sleeve I (15) set up on the outer circumferential wall of montant (10) hypomere and have with I (15) screw-thread fit's of internal thread sleeve external screw thread I, along the circumference of internal thread sleeve I (15) articulated on the outer circumferential wall of internal thread sleeve I (15) have a plurality of vaulting poles II (2) that correspond with vaulting pole I (3), and every the middle part of vaulting pole I (3) all articulates with the middle part of the vaulting pole II (2) that it corresponds, the upper segment cover of montant (10) is equipped with sleeve (6), rotate on the outer circumferential wall of sleeve (6) and be equipped with ring II (19), be in along the circumference of ring II (19) articulated on the outer circumferential wall of ring II (19) have a plurality of vaulting poles III (7) montant (10) go up the slip and be equipped with internal thread sleeve II (9) set up on the outer circumferential wall of sleeve (6) with internal thread sleeve II (9) screw-thread fit's external screw thread II, be in along the circumference of internal thread sleeve II (9) articulated on the outer circumferential wall of internal thread sleeve II (9) have a plurality of vaulting poles IV (8) that correspond with vaulting pole III (7), and every the middle part of vaulting pole III (7) that correspond with it is all articulated the middle part of internal thread sleeve I (15) and ring II (19) relative terminal surface between be equipped with restriction ring II (19) pivoted restriction subassembly.
2. The auxiliary mounting tool for the flanging prefabricated part of the residential kitchen and bathroom exhaust passage according to claim 1, wherein the limiting assembly comprises a plurality of limiting sleeves (5), each limiting sleeve (5) is connected with the side wall of the circular ring II (19), a limiting rod (4) is slidably arranged in each limiting sleeve (5), and the limiting rods (4) movably penetrate through the limiting sleeves (5) and extend outwards to be connected with the outer wall of the internal thread sleeve I (15).
3. The auxiliary mounting tool for the flanging prefabricated component of the residential kitchen and bathroom exhaust duct according to claim 1, characterized in that a plurality of nuts (13) are arranged on the outer circumferential wall of the internally threaded sleeve II (9) along the circumferential direction of the internally threaded sleeve II (9), a screw rod (11) in threaded fit with each nut (13) is arranged in each nut (13), a bearing is sleeved on the outer wall of each screw rod (11), and a horizontal plate (12) is arranged on the outer ring of each bearing.
4. The auxiliary mounting tool for the flanging prefabricated part of the residential kitchen and bathroom exhaust duct according to claim 1, wherein a rubber wheel (18) is rotatably arranged on the end surface of the free end of each of the stay I (3), the stay II (2), the stay III (7) and the stay IV (8).
5. The auxiliary mounting tool for the flanging prefabricated part of the residential kitchen and bathroom exhaust duct according to claim 1 is characterized in that an organ cover (20) in a circular ring shape is sleeved on the internal thread sleeve I (15), and the free end of each stay bar I (3) is connected with the organ cover (20).
6. The auxiliary mounting tool for the flanging prefabricated part of the residential kitchen and bathroom exhaust duct according to claim 1, wherein each brace I (3) is equal to each brace II (2), each brace III (7) is equal to each brace IV (8), and the length of the brace I (3) is greater than that of the brace III (7).
CN202022198456.7U 2020-09-30 2020-09-30 Auxiliary mounting tool for flanging prefabricated part of exhaust passage of residential kitchen and bathroom Active CN213449333U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202022198456.7U CN213449333U (en) 2020-09-30 2020-09-30 Auxiliary mounting tool for flanging prefabricated part of exhaust passage of residential kitchen and bathroom

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202022198456.7U CN213449333U (en) 2020-09-30 2020-09-30 Auxiliary mounting tool for flanging prefabricated part of exhaust passage of residential kitchen and bathroom

Publications (1)

Publication Number Publication Date
CN213449333U true CN213449333U (en) 2021-06-15

Family

ID=76286306

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Application Number Title Priority Date Filing Date
CN202022198456.7U Active CN213449333U (en) 2020-09-30 2020-09-30 Auxiliary mounting tool for flanging prefabricated part of exhaust passage of residential kitchen and bathroom

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