CN110026923B - Lifting frame for quickly adjusting to-be-detected area of knocking schlieren - Google Patents
Lifting frame for quickly adjusting to-be-detected area of knocking schlieren Download PDFInfo
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- CN110026923B CN110026923B CN201910341443.XA CN201910341443A CN110026923B CN 110026923 B CN110026923 B CN 110026923B CN 201910341443 A CN201910341443 A CN 201910341443A CN 110026923 B CN110026923 B CN 110026923B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B11/00—Work holders not covered by any preceding group in the subclass, e.g. magnetic work holders, vacuum work holders
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25H—WORKSHOP EQUIPMENT, e.g. FOR MARKING-OUT WORK; STORAGE MEANS FOR WORKSHOPS
- B25H1/00—Work benches; Portable stands or supports for positioning portable tools or work to be operated on thereby
- B25H1/10—Work benches; Portable stands or supports for positioning portable tools or work to be operated on thereby with provision for adjusting holders for tool or work
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Abstract
The invention provides a lifting frame for quickly adjusting a to-be-detected detonation schlieren area, which belongs to the field of schlieren experiment devices and comprises a base, a top plate, a fixed supporting assembly, a sliding assembly, a supporting column assembly, a clamp assembly, an adjusting screw rod and an adjusting nut; the base and the top plate are respectively provided with a square through hole and a square groove which are matched with the fixed supporting assembly and the sliding assembly, the fixed supporting assembly and the supporting column assembly support the lifting frame as a force bearing assembly, the sliding assembly can slide in a large stroke according to the actual size of the detonation chamber, the two adjusting screw rods are respectively fixed on the fixed supporting assembly and the sliding assembly, the clamp assembly clamps the detonation chamber and is assembled with the adjusting nut, the detonation chamber can be driven to slide together through rotating the adjusting nut, and therefore the rapid adjustment of the position of the region to be measured is achieved. The invention can overcome the problems of difficult fixation, limited adjusting range and limited support range of the size of the detonation chamber of the conventional lifting platform, and provides support for the smooth development of the detonation schlieren experiment.
Description
Technical Field
The invention relates to a lifting frame capable of quickly adjusting a to-be-measured area of a detonation chamber when a propagation process of detonation waves is researched by adopting a schlieren technology, and belongs to the field of schlieren experimental devices.
Background
In the field of knock research, schlieren is one of the most common optical measurement means, on one hand, the schlieren system is simple in structure and low in cost, on the other hand, the interaction process of shock waves in the flame propagation process can be visually displayed, and researchers can know the mechanism of knock formation.
The common layout of the schlieren system is Z-shaped, namely a point light source forms parallel light after being reflected by a first concave mirror, the parallel light passes through an area to be measured, then is reflected by a second concave mirror, passes through a knife edge and finally is shot by a high-speed camera. In the process of building the schlieren system, the light path is basically not changed after being adjusted, and particularly under the condition that the concave mirror is large (the diameter is more than dozens of centimeters), because the weight of each device of the system is large, and the shooting effect is very sensitive to the position change of the light path device, once the height or pitch adjustment is carried out, a large amount of time is consumed to obtain a good shooting effect. Therefore, if the measurement area needs to be changed, it is a common practice to adjust the position of the test piece.
However, for some detonation chambers with larger mass and size, the convenience of adjusting the position of the region to be measured is poor. The existing solution mainly adopts a manual or electric lifting platform, but the method has the following inconvenience in the implementation process. Firstly, the detonation chamber can generate thrust to slide when working, and the table surface of the lifting table is mostly smooth surface, so a set of clamp needs to be additionally arranged to fix the detonation chamber and the lifting table, which greatly increases the experiment cost; secondly, for the lifting platform with a determined size, the height adjusting range is limited (for example, the adjusting range corresponding to the size of the 20 multiplied by 20cm table top is generally not more than 30cm), and the adjusting range required by an experiment cannot be met; in addition, the detonation chamber is generally transversely arranged on the lifting platform surface, which means that the detonation chamber needs to be moved in the horizontal direction when the area to be measured is adjusted, so that the vertical lifting performance of the lifting platform is useless. Through the research at home and abroad, at present, no mechanism which is particularly suitable for quickly adjusting the detonation schlieren area to be measured is available, so that a lifting frame which is simple in structure, low in cost and wide in application range is designed, and the mechanism has important significance for smoothly developing detonation schlieren experiments.
Disclosure of Invention
In the field of the measurement of the knocking striae, the adjustment of the position of the region to be measured is a common operation. The existing lifting table generally has the defects of difficult fixation, limited adjusting range and limited size supporting range of a detonation chamber, and brings great inconvenience to the development of schlieren experiments. In order to solve the problems, the invention provides the lifting frame which is low in cost, convenient to operate and high in adaptability to the adjustment of the position of the area to be measured and the size of the detonation chamber.
In order to achieve the purpose, the invention adopts the technical scheme that:
the utility model provides a crane for regional quick adjustment that knocks schlieren awaits measuring, includes base, fixed supporting component, slip subassembly, support column subassembly, anchor clamps subassembly, adjusting screw, adjusting nut and roof, its characterized in that: fixed supporting component installs in the first square through-hole of base, the slip subassembly is placed in the second square through-hole of base and can be done the long stroke and slide (2 ~ 50cm), in order to reach the purpose that adapts to multiple not unidimensional detonation chamber, adjusting screw is fixed in respectively on fixed supporting component and the slip subassembly, one side processing of anchor clamps subassembly has the through-hole that passes adjusting screw and places adjusting nut's U type groove, the opposite side is then the centre gripping detonation chamber, through rotatory adjusting nut, can drive anchor clamps subassembly (the detonation chamber) and slide from top to bottom together, thereby realize the quick adjustment of the regional position that awaits measuring.
The base is made of steel plates, the overall stability of the lifting frame is guaranteed, a first square through hole is formed in the left side of the lifting frame and used for assembling the fixed supporting assembly, a second square through hole with the length of 50cm is formed in the right side of the lifting frame, the sliding assembly is placed in the sliding assembly and slides in a large stroke, and bolt mounting holes and first bolt mounting grooves are formed in the periphery of the sliding assembly and used for fastening the fixed supporting assembly and the sliding assembly respectively; the top plate is made of aluminum alloy with light weight, a first square groove and a second square groove are respectively machined on the left side and the right side of the top plate and are respectively used for assembling the fixed supporting assembly and the sliding assembly, and a bolt mounting hole and a second bolt mounting groove for fastening the fixed supporting assembly and the sliding assembly are designed on the upper surface of the top plate; two cylindrical through holes are respectively processed on the rightmost sides of the base and the top plate, and a support column assembly (a cylinder with a thick middle part and thin two ends) is inserted into the cylindrical through holes and serves as a right force bearing assembly between the base and the top plate to prevent the sliding assembly from sliding smoothly under the action of the gravity of the top plate.
The fixed support component comprises a fixed support plate, a first fixed block and a second fixed block; the fixed support plate is a cuboid iron plate, a series of bolt holes are processed on the surface of the fixed support plate, the lower end and the upper end of the fixed support plate are respectively inserted into a first square through hole and a first square groove of the base and the top plate to realize positioning, and the fixed support plate is fastened with the base and the top plate through bolts and serves as a left side force bearing piece; the sliding assembly comprises a sliding support plate, a third fixing block and a fourth fixing block; the upper end and the lower end of the base plate are respectively inserted into a second square groove and a second square through hole of the top plate and the base, and can slide in a large stroke (2-50 cm) according to the specific size of the detonation chamber; the four fixing blocks are iron blocks, one side of each fixing block is provided with a square through hole (used for being assembled with the adjusting screw), the other side of each fixing block is provided with a threaded hole, the first fixing block and the second fixing block are respectively assembled at the upper end and the lower end of the fixed supporting plate through bolts, and the third fixing block and the fourth fixing block are respectively assembled at the upper end and the lower end of the sliding supporting plate through bolts.
The number of the adjusting screws is two, the length of the adjusting screws is 1m, the two ends of the adjusting screws are square cylinders, and threads are machined on the surface of the middle part of the adjusting screws; the square cylinders of the two adjusting screws are respectively inserted into the square through holes of the two fixed blocks of the fixed supporting assembly and the sliding assembly, so that the positioning and fastening of the adjusting screws are guaranteed, and the middle threaded cylinder is used for adjusting the position of the detonation chamber up and down.
The clamp assembly comprises two clamp blocks which are fastened with two side edges of the detonation chamber through bolts respectively, the clamp assembly and the detonation chamber are assembled into a whole, the other side of the detonation chamber is in a U shape, a cylindrical through hole is processed, and the clamp assembly can pass through the adjusting screw rod and can slide in the adjusting screw rod freely.
The two adjusting nuts are respectively placed in the U-shaped grooves of the two clamp blocks, and the distance between each adjusting nut and the edge of each U-shaped groove is about 2mm, so that the adjusting nuts can smoothly rotate in the U-shaped grooves, and large gaps between the adjusting nuts and the edges of the U-shaped grooves of the clamp blocks are avoided, and the clamp assembly is loosened in the vertical direction; the two adjusting nuts and the two clamp blocks are respectively assembled in the two adjusting screw rods, and the two adjusting nuts are rotated simultaneously, so that the clamp assembly and the detonation chamber can be driven to slide in one dimension in the vertical direction (the maximum stroke is 1m), and the rapid adjustment of a region to be detected of the detonation chamber is realized.
Has the advantages that: by adopting the schlieren area to be measured adjusting lifting frame provided by the invention, the upper position and the lower position of a measuring area of a detonation chamber can be flexibly adjusted by rotating the adjusting nut, the operation is convenient, the maximum stroke reaches 1m and is more than two times of that of a lifting table with the same size, the structure is simpler, and the detonation chamber can still be fixedly connected with the lifting frame under high-frequency ignition; in addition, the sliding stroke of the sliding support plate can reach 50cm, the detonation chamber is suitable for the condition that the width of the detonation chamber is within 50cm, and the detonation chamber has wider adaptability to the size of the detonation chamber.
Drawings
FIG. 1 is a schematic diagram of a light path system for knocking schlieren.
Fig. 2 is a schematic view of the overall structure of the crane.
FIG. 3 is a schematic view of the assembly of the base, support column assembly and top plate.
FIG. 4 is a schematic view of the assembly of the fixed support assembly, the slide assembly and the adjustment screw.
FIG. 5 is a schematic view of the clamp assembly and adjusting nut assembly.
Wherein, 1 is a lifting frame, 2 is a light source, 3 is a small hole, 4 is a first concave mirror, 5 is a second concave mirror, 6 is a knife edge, 7 is a high-speed camera, 1-1 is a base, 1-2 is a top plate, 1-3 is a fixed support plate, 1-4 is a sliding support plate, 1-5 is a first support column, 1-6 is a second support column, 1-7 is a first adjusting screw rod, 1-8 is a second adjusting screw rod, 1-9 is a first adjusting nut, 1-10 is a second adjusting nut, 1-11 is a first fixed block, 1-12 is a second fixed block, 1-13 is a third fixed block, 1-14 is a fourth fixed block, 1-15 is a first clamp block, 1-16 is a second clamp block, 1-17 is a detonation chamber, 1-18 is a first square through hole, 1-19 is a second square through hole, 1-20 is a first bolt mounting groove, 1-21 is a first cylindrical through hole, 1-22 is a second cylindrical through hole, 1-23 is a first square groove, 1-24 is a second square groove, 1-25 is a second bolt mounting groove, 1-26 is a third cylindrical through hole, and 1-27 is a fourth cylindrical through hole.
Detailed Description
The invention is further described with reference to the accompanying drawings and the specific implementation process.
Referring to fig. 1, before schlieren measurement is carried out, the centers of a light source 2, a small hole 3, a first concave mirror 4, a second concave mirror 5, a knife edge 6, a high-speed camera 7 and other devices are adjusted to the same height, so that parallel light reflected by the first concave mirror 4 can be ensured to be exactly projected onto the second concave mirror 5, in addition, the included angle between the light between the small hole 3 and the first concave mirror 4 and the included angle between the light between the first concave mirror 4 and the second concave mirror 5 are maintained within a small range of 10-20 degrees, the shooting effect of schlieren images is improved, and detonation chambers 1-17 (clamped by a crane 1) are placed in the parallel light between the first concave mirror 4 and the second concave mirror 5, so that a schlieren system is completely built.
Referring to fig. 2, 3 and 4, the crane 1 is integrally of a modular design and is formed by splicing a plurality of sub-components. The left end and the right end of the base 1-1 are provided with first square through holes 1-18 and second square through holes 1-19 which are used for matching the fixed support plate 1-3 and the sliding support plate 1-4 respectively, the left side of the base is provided with a bolt mounting hole, after the fixed support plate 1-3 is inserted into the first square through holes 1-18, the fixed support plate 1-3 is fixedly connected with the first square through holes 1-4 through bolts, the front side and the back side of the right side of the base are provided with first bolt mounting grooves 1-20, the sliding support plate 1-4 slides left and right in the second square through holes 1-19, the sliding support plate slides to a proper position according to the specific size of a detonation chamber 1-17 in the experimental process, and then the sliding support. First square grooves 1-23 and second square grooves 1-24 are formed in the left end and the right end of the top plate 1-2, the upper ends of the fixed support plate 1-3 and the sliding support plate 1-4 are respectively inserted into the two grooves, and the bolt mounting hole in the left side and the second bolt mounting groove 1-25 in the right side are respectively used for fastening the fixed support plate 1-3 and the sliding support plate 1-4 with the top plate 1-2. The first supporting columns 1-5 and the second supporting columns 1-6 are cylinders with two thin ends and thick middle parts, the thin cylinders at the two ends of the first supporting columns 1-5 are respectively inserted into the first cylindrical through holes 1-21 and the third cylindrical through holes 1-26, the thin cylinders at the two ends of the second supporting columns 1-6 are respectively inserted into the second cylindrical through holes 1-22 and the fourth cylindrical through holes 1-27, the thick middle parts of the two supporting columns support the base 1-1 and the top plate 1-2 to serve as force bearing parts, and the sliding supporting plates 1-4 are prevented from sliding smoothly under the action of gravity of the top plate 1-2 (as shown in figure 3). The first fixing block 1-11, the second fixing block 1-12, the third fixing block 1-13 and the fourth fixing block 1-14 are all iron blocks, one ends of the iron blocks are provided with square through holes, the other sides of the iron blocks are provided with threaded holes, the first fixing block 1-11 and the second fixing block 1-12 can be connected with the fixing support plate 1-3 through bolts, and the third fixing block 1-13 and the fourth fixing block 1-14 are connected with the sliding support plate 1-4. The lengths of the first adjusting screw rods 1-7 and the second adjusting screw rods 1-8 are both 1m, square cylinders are processed at two ends, threaded rods are arranged in the middle, the cross-sectional sizes of the square cylinders are smaller than those of the threaded rods, when the square cylinders at two ends of the first adjusting screw rods 1-7 are inserted into the square through holes of the first fixed blocks 1-11 and the second fixed blocks 1-12, and the square cylinders at two ends of the second adjusting screw rods 1-8 are inserted into the square through holes of the third fixed blocks 1-13 and the fourth fixed blocks 1-14, 6 degrees of freedom of the two adjusting screw rods can be strictly limited, and the problem that the adjusting process is inconvenient due to the fact that the two adjusting screw rods are loosened when the positions of an area to be measured in the detonation chamber 1-17 in the later stage is avoided (as shown in fig.
Referring to fig. 2 and 5, the jig assembly is composed of first jig blocks 1 to 15 and second jig blocks 1 to 16. Bolt holes are designed on one side edge of the first clamp block 1-15 and the second clamp block 1-16, the first clamp block and the second clamp block are fastened with a detonation chamber 1-17 through bolts (as shown in figure 2), the other side of the first clamp block and the second clamp block is provided with a U-shaped groove, cylindrical through holes are designed, the size of each through hole can just penetrate through two adjusting screw rods and can smoothly slide in the U-shaped groove, the first adjusting nut 1-9 and the second adjusting nut 1-10 are respectively placed in the two U-shaped grooves, the distance between the first adjusting nut 1-9 and the second adjusting nut 1-10 and the edge of the U-shaped groove is about 2mm, and the looseness of the first clamp block 1-15 and the second clamp block 1-16 in the; the first adjusting screw 1-9 and the second adjusting screw 1-10 are provided with knurling on the surface to prevent slipping during adjustment, and are internally provided with threads matched with the first adjusting screw 1-7 and the second adjusting screw 1-8 (as shown in figure 5). After the clamp assembly is assembled, the clamp assembly is inserted into the first adjusting screw rod 1-7 and the second adjusting screw rod 1-8 to support the detonation chamber 1-17, and the first adjusting nut 1-9 and the second adjusting nut 1-10 are rotated at the same time to drive the detonation chamber 1-17 to move in the vertical direction (the maximum stroke is 1m), so that the area to be measured in a schlieren experiment can be conveniently adjusted; after the adjustment is finished, under the action of the clamp assembly and the gravity of the detonation chamber 1-17, the thread contact surfaces between the first adjusting nut 1-9 and the first adjusting screw rod 1-7 and between the second adjusting nut 1-10 and the second adjusting screw rod 1-8 are tightly pressed, which is equivalent to introducing a self-locking function to prevent the first adjusting nut 1-9 and the second adjusting nut 1-10 from sliding automatically in the experimental process.
While the present invention has been described in detail and with reference to the drawings and the detailed description thereof, it is not intended to limit the invention to the embodiment, but it is possible for those skilled in the art to make various changes and modifications without departing from the spirit of the invention.
Claims (1)
1. The utility model provides a crane for regional quick adjustment that knocks schlieren awaits measuring, includes base, fixed supporting component, slip subassembly, support column subassembly, anchor clamps subassembly, adjusting screw, adjusting nut and roof, its characterized in that: the fixed supporting component is arranged in a first square through hole of the base, the sliding component is placed in a second square through hole of the base and can slide in a large stroke range, the stroke range is 2-50 cm, so that the purpose of adapting to detonation chambers of various sizes is achieved, the adjusting screw rods are respectively fixed on the fixed supporting component and the sliding component, one side of the clamp component is provided with a through hole for penetrating through the adjusting screw rod and a U-shaped groove for placing an adjusting nut, the other side of the clamp component clamps the detonation chamber, and the detonation chamber can be driven to slide up and down together by rotating the adjusting nut, so that the position of a region to be detected can be quickly adjusted; the base is made of steel plates, the overall stability of the lifting frame is guaranteed, a first square through hole is formed in the left side of the lifting frame and used for assembling the fixed supporting assembly, a second square through hole with the length of 50cm is formed in the right side of the lifting frame, the sliding assembly is placed in the sliding assembly and slides in a large stroke, and bolt mounting holes and first bolt mounting grooves are formed in the periphery of the sliding assembly and used for fastening the fixed supporting assembly and the sliding assembly respectively; the fixed support component comprises a fixed support plate, a first fixed block and a second fixed block; the fixed support plate is a cuboid iron plate, a series of bolt holes are processed on the surface of the fixed support plate, the lower end and the upper end of the fixed support plate are respectively inserted into a first square through hole and a first square groove of the base and the top plate to realize positioning, and the fixed support plate is fastened with the base and the top plate through bolts and serves as a left side force bearing piece; the sliding assembly comprises a sliding support plate, a third fixing block and a fourth fixing block; the upper end and the lower end of the base are respectively inserted into a second square groove and a second square through hole of the top plate and the base, and can slide in a large stroke according to the specific size of the detonation chamber; the four fixing blocks are iron blocks, one side of each fixing block is provided with a square through hole used for being assembled with the adjusting screw rod, the other side of each fixing block is provided with a threaded hole, the first fixing block and the second fixing block are respectively assembled at the upper end and the lower end of the fixing support plate through bolts, and the third fixing block and the fourth fixing block are respectively assembled at the upper end and the lower end of the sliding support plate through bolts; the support column assembly is inserted into the cylindrical through hole and serves as a right side bearing part between the base and the top plate, so that the sliding assembly is prevented from being incapable of sliding smoothly under the action of the gravity of the top plate; the clamp assembly comprises two clamp blocks which are fastened with two side edges of the detonation chamber through bolts respectively, the clamp assembly and the detonation chamber are assembled into a whole, the other side of the detonation chamber is U-shaped, a cylindrical through hole is processed, and the clamp assembly can pass through the adjusting screw and can slide in the adjusting screw randomly; the number of the adjusting screws is two, the length of the adjusting screws is 1m, the two ends of the adjusting screws are square cylinders, and threads are machined on the surface of the middle part of the adjusting screws; the square cylinders of the two adjusting screws are respectively inserted into the square through holes of the two fixed blocks of the fixed support assembly and the sliding assembly, so that the positioning and fastening of the adjusting screws are ensured, and the middle threaded cylinder is used for adjusting the position of the detonation chamber up and down; the two adjusting nuts are respectively placed in the U-shaped grooves of the two clamp blocks, and the distance between each adjusting nut and the edge of each U-shaped groove is about 2mm, so that the adjusting nuts can smoothly rotate in the U-shaped grooves, and large gaps between the adjusting nuts and the edges of the U-shaped grooves of the clamp blocks are avoided, and the clamp assembly is loosened in the vertical direction; the two adjusting nuts and the two clamp blocks are respectively assembled into the two adjusting screw rods, and the two adjusting nuts are simultaneously rotated to drive the clamp assembly and the detonation chamber to slide in one dimension in the vertical direction, so that the rapid adjustment of a region to be detected of the detonation chamber is realized; the top plate is made of aluminum alloy with light weight, a first square groove and a second square groove are respectively machined on the left side and the right side of the top plate and are respectively used for assembling the fixed supporting assembly and the sliding assembly, and a bolt mounting hole and a second bolt mounting groove for fastening the fixed supporting assembly and the sliding assembly are designed on the upper surface of the top plate; two cylindrical through holes are respectively processed on the rightmost sides of the base and the top plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910341443.XA CN110026923B (en) | 2019-04-26 | 2019-04-26 | Lifting frame for quickly adjusting to-be-detected area of knocking schlieren |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910341443.XA CN110026923B (en) | 2019-04-26 | 2019-04-26 | Lifting frame for quickly adjusting to-be-detected area of knocking schlieren |
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| Publication Number | Publication Date |
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| CN110026923A CN110026923A (en) | 2019-07-19 |
| CN110026923B true CN110026923B (en) | 2021-02-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910341443.XA Active CN110026923B (en) | 2019-04-26 | 2019-04-26 | Lifting frame for quickly adjusting to-be-detected area of knocking schlieren |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2192146A (en) * | 1986-06-10 | 1988-01-06 | Peter N Jackson | A transverse clamp |
| CN107315010A (en) * | 2017-08-15 | 2017-11-03 | 合肥工业大学 | A kind of lightweight schlieren |
| CN107758562A (en) * | 2017-11-20 | 2018-03-06 | 国网山东省电力公司龙口市供电公司 | A kind of lift for power construction |
| CN108214346A (en) * | 2017-11-28 | 2018-06-29 | 浙江卓怡纺织有限公司 | A kind of cross pipe fitting fixed mechanism |
| CN109368992A (en) * | 2018-12-29 | 2019-02-22 | 蚌埠凯盛工程技术有限公司 | A kind of glass pressing machine elevation and subsidence regulating device that can adjust wide cut |
-
2019
- 2019-04-26 CN CN201910341443.XA patent/CN110026923B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2192146A (en) * | 1986-06-10 | 1988-01-06 | Peter N Jackson | A transverse clamp |
| CN107315010A (en) * | 2017-08-15 | 2017-11-03 | 合肥工业大学 | A kind of lightweight schlieren |
| CN107758562A (en) * | 2017-11-20 | 2018-03-06 | 国网山东省电力公司龙口市供电公司 | A kind of lift for power construction |
| CN108214346A (en) * | 2017-11-28 | 2018-06-29 | 浙江卓怡纺织有限公司 | A kind of cross pipe fitting fixed mechanism |
| CN109368992A (en) * | 2018-12-29 | 2019-02-22 | 蚌埠凯盛工程技术有限公司 | A kind of glass pressing machine elevation and subsidence regulating device that can adjust wide cut |
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| CN110026923A (en) | 2019-07-19 |
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