CN211645843U - Preparation instrument of track ice surface - Google Patents
Preparation instrument of track ice surface Download PDFInfo
- Publication number
- CN211645843U CN211645843U CN201922493182.1U CN201922493182U CN211645843U CN 211645843 U CN211645843 U CN 211645843U CN 201922493182 U CN201922493182 U CN 201922493182U CN 211645843 U CN211645843 U CN 211645843U
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- Prior art keywords
- pipe
- storage box
- water
- fixedly connected
- ice
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn - After Issue
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- 238000002360 preparation method Methods 0.000 title claims abstract description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 83
- 238000003860 storage Methods 0.000 claims abstract description 46
- 239000000463 material Substances 0.000 claims abstract description 40
- 238000001816 cooling Methods 0.000 claims abstract description 24
- 238000003825 pressing Methods 0.000 claims abstract description 21
- 238000007599 discharging Methods 0.000 claims abstract description 13
- 238000007789 sealing Methods 0.000 claims abstract description 8
- 239000000284 extract Substances 0.000 claims abstract description 6
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 20
- 239000007788 liquid Substances 0.000 claims description 10
- 229910052757 nitrogen Inorganic materials 0.000 claims description 10
- 230000000694 effects Effects 0.000 abstract description 8
- 239000000498 cooling water Substances 0.000 abstract description 2
- 238000004378 air conditioning Methods 0.000 description 12
- 239000002893 slag Substances 0.000 description 8
- 239000004576 sand Substances 0.000 description 7
- 238000005192 partition Methods 0.000 description 5
- 208000001034 Frostbite Diseases 0.000 description 4
- 238000004891 communication Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 239000003507 refrigerant Substances 0.000 description 4
- 238000007710 freezing Methods 0.000 description 3
- 230000008014 freezing Effects 0.000 description 2
- 238000005338 heat storage Methods 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 238000007493 shaping process Methods 0.000 description 2
- 239000008399 tap water Substances 0.000 description 2
- 235000020679 tap water Nutrition 0.000 description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 1
- 241001233242 Lontra Species 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 235000011089 carbon dioxide Nutrition 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 238000003892 spreading Methods 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
Images
Abstract
The utility model relates to a preparation tool for ice surface of a track, which comprises a machine body, a material bearing box, a material conveying pipe, a screw conveyor, a discharging device, a water storage box, a water conveying pipe, a pressing plate and a pre-cooling device for pre-cooling water; the pre-cooling device comprises a cold storage box, wherein a refrigerating material is stored in the cold storage box, a discharge hole is formed in the cold storage box, and a sealing plate for sealing the discharge hole is mounted on the discharge hole; the air-cooling refrigerator is characterized in that the cold storage box is fixedly connected with an exhaust pipe, the exhaust pipe is communicated with the interior of the cold storage box, the other end of the exhaust pipe is provided with an exhaust fan, and the exhaust fan extracts cold air in the cold storage box and discharges the cold air. The utility model discloses the effect that the condition that water takes place to flow appears when having the bulk cooling that reduces.
Description
Technical Field
The utility model belongs to the technical field of the technique of ice surface racetrack preparation and specifically relates to a preparation instrument of racetrack ice surface is related to.
Background
At present, the ice rink is also called as an ice rink, and an ice layer is mostly obtained by artificial ice making, so that the natural ice surface can be restored to the maximum extent, and good entertainment experience is provided for users.
Chinese patent No. CN209816601U discloses an ice sheet cracking-proof structure for ice rinks, which comprises a plurality of partition boards arranged in a coil sand layer, wherein the bottom ends of the partition boards are connected with an anti-freezing concrete layer, and the top ends of the partition boards are positioned above the coil sand layer; the ice board can be effectively protected under the condition that the thickness of the ice layer is limited, so that the ice board is not easy to crack; when the ice layer receives the impact and produces vibrations, viscoelasticity damping piece can in time dissipate the energy, prevents the effect of vibrations energy accumulation with the ice layer destruction.
Among the above-mentioned prior art, the ice surface mainly divide into concrete layer, coil pipe sand layer, baffle layer and ice sheet of preventing frostbite, and concrete layer, coil pipe sand layer, baffle layer and ice sheet of preventing frostbite arrange from bottom to top in proper order moreover.
When carrying out the arrangement of ice surface, arrange good with the concrete layer that prevents frostbite earlier, then lay the coil pipe sand bed on the concrete layer that prevents frostbite to fixed baffle layer on the coil pipe sand bed, later spread the material of ice sheet on the baffle layer again, cover the baffle layer, make level, guarantee the surfacing of ice sheet, carry out the freeze treatment to the ice sheet at last again, make the ice sheet material solidify the shaping.
As shown in fig. 1 and 2, when an ice layer is formed, a spreading machine is generally used to form the ice layer, and the ice layer material is in a slurry state when not solidified. The paver comprises a machine body 1, wherein a material bearing box 2 is arranged in the machine body 1, and ice layer materials are placed in the material bearing box 2. Fixedly connected with conveying pipeline 3 on organism 1, install screw conveyer 4 on conveying pipeline 3, and conveying pipeline 3 and the downside fixed connection who holds workbin 2, conveying pipeline 3 and the inside intercommunication that holds workbin 2, install the control valve on conveying pipeline 3, open the control valve, the ice sheet material that holds in the workbin 2 gets into conveying pipeline 3 under the effect of self gravity in, the ice sheet material that gets into in conveying pipeline 3 advances in conveying pipeline 3 under bolt conveyer's effect.
At the other end fixedly connected with discharging device 5 of conveying pipeline 3, during the ice layer material gets into discharging device 5 in the conveying pipeline 3, discharging device 5 was discharged the ice layer material and was spread on the baffle layer, and wherein, discharging device 5 enlarges the area that the ice layer material paved, still installs the pressure flat board 6 on discharging device 5, flattens the ice layer material that paves, lets paving of ice layer material more level and smooth.
The machine body 1 is also provided with a water storage tank 7, the lower side of the water storage tank 7 is fixedly connected with a water delivery pipe 8, the other end of the water delivery pipe 8 is fixedly connected to the discharging device 5, and the water storage tank 7 is filled with water with high purity. Skating rinks can be divided into two categories: one is paved on the ground by cement and used for roller skates; the other is made of dry ice and is used for the blade-shaped skating shoe.
The ice of the ice skate blade skating rink must adopt water with high purity, and common tap water cannot be used, because the impurities in the tap water are too much, and after the impurities are mixed into gaps of ice crystals, an ice layer is weak and cannot bear people skating on the ice layer.
The water discharged from the water delivery pipe 8 is spread on the ice layer material, and the discharging device 5 spreads the water so that the water can be spread on the ice layer material to form a frozen surface after being solidified.
The coil pipe is generally arranged in the coil pipe sand layer, and liquid nitrogen is injected into the coil pipe and is used for cooling the ice layer, accelerating the solidification of the ice layer and slowing down the melting of the ice layer.
The above prior art solutions have the following drawbacks: after the ice layer material is paved by using the paver, the whole track needs to be cooled, the ice layer material is solidified, but in the actual pavement, because water has fluidity, in the process of cooling after pavement is finished, water may flow on the ice layer material to a certain extent, so that the water is unevenly distributed, and the overall flatness of the ice surface after subsequent cooling is influenced.
SUMMERY OF THE UTILITY MODEL
To the not enough of prior art existence, one of the purposes of the utility model is to provide a preparation instrument of track ice surface, through carrying out precooling to water at the paving in-process, the condition that water takes place to flow appears when reducing the whole cooling.
The above utility model discloses an above-mentioned utility model purpose can realize through following technical scheme:
a preparation tool for a racetrack ice surface comprises a body, a material bearing box, a material conveying pipe, a screw conveyor, a discharging device, a water storage box, a water conveying pipe, a pressing plate and a pre-cooling device for pre-cooling water;
the pre-cooling device comprises a cold storage box, wherein a refrigerating material is stored in the cold storage box, a discharge hole is formed in the cold storage box, and a sealing plate for sealing the discharge hole is mounted on the discharge hole;
the cold storage box is fixedly connected with an exhaust pipe, the exhaust pipe is communicated with the interior of the cold storage box, the other end of the exhaust pipe is provided with an exhaust fan, and the exhaust fan extracts cold air in the cold storage box and discharges the cold air;
the air outlet pipe is fixedly connected to the exhaust fan and is fixedly connected to the air outlet end of the exhaust fan; the air outlet of the air outlet pipe faces the ice layer material.
By adopting the technical scheme, when the ice layer is prepared, the ice layer material is continuously paved on the partition plate layer along with the advance of the machine body, water is sprinkled on the ice layer material, and cold air blown out from the air outlet pipe acts on the water surface to cool the water, so that ice slag is formed in the water. Wherein, when air conditioning blows on the surface of water, can make the surface of water take place to flow, the outlet duct is arranged in the front side of pressing the flat board for in the water after the ice slag that comes out, the pressing flat board still can make level to the surface of water, increases the roughness of surface of water, reduces air conditioning to the smooth influence of surface of water. After ice and slag are mixed in the water, the water is pre-shaped, and the flow of the water surface is reduced. By pre-shaping the water, the flow of the water is reduced, and the frozen surface formed by the water during subsequent cooling is more level.
The present invention may be further configured in a preferred embodiment as: the refrigerating material is selected from ice blocks or liquid nitrogen.
By adopting the technical scheme, when ice blocks are used as refrigerating materials, the discharge port on the cold storage box is opened, when the exhaust fan extracts cold air from the cold storage box, air flows into the cold storage box from the discharge port, passes through the ice blocks, and cools the air, so that the exhaust fan is convenient to extract the cold air; when liquid nitrogen is used as a refrigerating material, a discharge hole on the cold storage box is closed, and cold air extracted by the exhaust fan is cold air generated by the liquid nitrogen.
The present invention may be further configured in a preferred embodiment as: the air outlet end of the air outlet pipe is provided with an expanding piece;
the flaring piece comprises a connecting pipe fixedly connected with the air outlet pipe, and a flaring pipe is fixedly connected to the connecting pipe.
Through adopting above-mentioned technical scheme, during air conditioning got into the connecting pipe from outlet duct department, got into the expansion pipe from the connecting pipe, volume when increasing air conditioning and flowing enlarged the area of contact of air conditioning and surface of water, increased the area of being cooled of surface of water.
The present invention may be further configured in a preferred embodiment as: the connecting pipe is internally provided with a screen plate, and the screen plate is provided with a plurality of through holes.
Through adopting above-mentioned technical scheme, the otter board is convenient for the air conditioning diffusion, lets air conditioning be convenient for fill up whole expansion pipe.
The present invention may be further configured in a preferred embodiment as: the through holes of the mesh plate are arranged obliquely, and the oblique direction is expanded outwards along the flow direction of the cold air.
Through adopting above-mentioned technical scheme, the through-hole of slope lets air conditioning be convenient for fill the edge of expanding the pipe.
The present invention may be further configured in a preferred embodiment as: the expansion pipe is fixedly connected with two balance pipes which are communicated with the connecting pipe and the expansion pipe.
By adopting the technical scheme, under the action of the balance pipe, the expansion pipe is provided with the plurality of air inlet ends, so that the flow rate balance of the cold air discharged from the expansion pipe can be more easily achieved, and the flow rate difference of the cold air in the expansion pipe is reduced.
The present invention may be further configured in a preferred embodiment as: the pressure plate is fixedly connected with a plurality of communicating pipes, one end of each communicating pipe is fixedly connected with the pressure plate, and the other end of each communicating pipe is fixedly connected with the cold storage box.
Through adopting above-mentioned technical scheme, the air conditioning in the cold storage tank can be via the intercommunication pipe flow to dull and stereotyped department, cools down to the dull and stereotyped for the temperature on the dull and stereotyped reduces, when carrying out the suppression to the water that contains the ice, and the dull and stereotyped water that can promote is frozen.
The present invention may be further configured in a preferred embodiment as: the pressing plate is internally provided with a cavity, and the communicating pipe is communicated with the cavity.
Through adopting above-mentioned technical scheme, can improve the cooling effect to the clamp plate is inside.
To sum up, the utility model discloses a following at least one useful technological effect:
1. the water is cooled and pre-shaped, so that the flow of the water is reduced, and the freezing surface formed by the water in the subsequent cooling is more level;
2. the area of water cooled is increased by arranging the enlarged pipe;
3. through setting up communicating pipe, let and press the flat board and can improve the cooling effect of water to lowering the temperature when flattening water.
Drawings
FIG. 1 is a schematic diagram of a prior art preparation tool;
FIG. 2 is a schematic view of a prior art machine body with a material-carrying box disposed therein;
FIG. 3 is a schematic view of a preparation tool in the present embodiment;
FIG. 4 is a schematic view of the machine body with the material-holding box and the water storage box arranged therein;
FIG. 5 is a schematic view of the pre-cooling device in this embodiment;
FIG. 6 is a schematic structural view of the mouthpiece of this embodiment;
fig. 7 is a schematic structural view of the middle pressing plate of the present embodiment with a cavity.
In the figure, 1, a machine body; 2. a material bearing box; 3. a delivery pipe; 4. a screw conveyor; 5. a discharging device; 6. pressing a flat plate; 7. a water storage tank; 8. a water delivery pipe; 9. a pre-cooling device; 91. a cold storage tank; 92. a discharging port; 93. a closing plate; 94. an exhaust pipe; 95. an exhaust fan; 96. an air outlet pipe; 97. a flaring piece; 971. a connecting pipe; 972. enlarging the tube; 973. a screen plate; 974. a through hole; 975. a balance tube; 98. a communicating pipe; 99. a cavity.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Referring to fig. 3 and 4, for the utility model discloses a preparation instrument of racetrack ice surface, including organism 1, holding feed box 2, conveying pipeline 3, screw conveyer 4, discharging device 5, water storage box 7, raceway 8, pressure flat board 6, still including being used for carrying out the device of cooling down in advance 9 of cooling down in advance to water.
Referring to fig. 4 and 5, the pre-cooling device 9 includes a cold storage box 91, a cooling material is stored in the cold storage box 91, a discharge hole 92 is formed in the cold storage box 91, and a sealing plate 93 for sealing the discharge hole 92 is installed on the discharge hole 92. The refrigerating material can be ice blocks or liquid nitrogen. When ice cubes are used as the refrigerant, the discharge port 92 is opened; when liquid nitrogen is used as the refrigerant, the drain port 92 is closed to prevent leakage of the liquid nitrogen.
An exhaust pipe 94 is fixedly connected to the heat-storage tank 91, the exhaust pipe 94 communicates with the interior of the heat-storage tank 91, and cold air generated by the refrigerant can enter the exhaust pipe 94. An exhaust fan 95 is installed at the other end of the exhaust duct 94, and the exhaust fan 95 extracts the cold air in the cold storage box 91 and discharges the cold air.
When the ice layer is prepared, the ice layer material is continuously paved on the partition plate layer along with the advance of the machine body 1, water is sprinkled on the ice layer material, cold air blown out from the air outlet pipe 96 acts on the water surface to cool the water, and ice slag is formed in the water. Wherein, when air conditioning blows on the surface of water, can make the surface of water take place to flow, and outlet duct 96 arranges in the front side of pressure flat board 6 for in the water after the ice slag that comes out, pressure flat board 6 still can make level to the surface of water, increases the roughness of the surface of water, reduces air conditioning to the smooth influence of surface of water. After ice and slag are mixed in the water, the water is pre-shaped, and the flow of the water surface is reduced.
When ice blocks are used as a refrigerating material, the discharge port 92 on the cold storage box 91 is opened, when the exhaust fan 95 extracts cold air from the cold storage box 91, air flows into the cold storage box 91 from the discharge port 92 and passes through the ice blocks, and the ice blocks cool the air, so that the exhaust fan 95 is convenient to extract the cold air; when liquid nitrogen is used as the refrigerant, the discharge port 92 of the cold storage tank 91 is closed, and the cold air drawn by the exhaust fan 95 is the cold air generated by the liquid nitrogen itself.
In order to make the cold air discharged from the outlet pipe 96 act on a larger area, referring to fig. 5 and 6, an outlet end of the outlet pipe 96 is provided with a flaring member 97, the flaring member 97 comprises a connecting pipe 971 fixedly connected with the outlet pipe 96, the connecting pipe 971 is fixedly connected with a flaring pipe 972, the flaring pipe 972 is in a pyramid shape, one end with a small opening is fixedly connected with the connecting pipe 971, and the other end faces the ground. The screen plate 973 is arranged in the connecting pipe 971, the screen plate 973 is provided with a plurality of through holes 974, cold air enters the connecting pipe 971 from the air outlet pipe 96 and enters the expansion pipe 972 from the connecting pipe 971, the volume of the cold air during flowing is increased, the contact area of the cold air and the water surface is enlarged, and the cooled area of the water surface is increased.
The cold air passes through the mesh plate 973 of the connection pipe 971 in the process of passing through the connection pipe 971, the through holes 974 on the mesh plate 973 are obliquely arranged, and the oblique direction is outwards expanded along the flow direction of the cold air, so that the cold air is dispersed under the action of the mesh plate 973 when passing through the mesh plate 973, and the cold air is convenient for filling the whole expanded pipe 972.
In addition, after the cold air enters the enlarged pipe 972, the flow rate of the cold air at the center of the enlarged pipe 972 is greater than that at the edge, so that the cold degree of the water surface is not uniform when the cold air is contacted with the water surface, in order to make the cold degree more balanced, two balance pipes 975 are fixedly connected to the enlarged pipe 972, one end of each balance pipe 975 is fixedly connected to a connecting pipe 971, the other end of each balance pipe 975 is fixedly connected to the side wall of the enlarged pipe 972, the two balance pipes 975 are symmetrically arranged along the connecting pipe 971, the position where the balance pipe 975 is connected with the connecting pipe 971 is positioned in front of a screen plate 973, so that part of the cold air enters the balance pipes 975 before entering the connecting pipe 971 and passing through the screen plate 973, under the action of the balance pipes 975, a plurality of air inlet ends exist on the enlarged pipe 972, the cold air discharged from the enlarged pipe 972 is more easily balanced, and the difference of the flow rate of.
Referring to fig. 5 and 7, a plurality of communication pipes 98 are fixedly connected to the pressing plate 6, one end of each communication pipe 98 is fixedly connected to the pressing plate 6, and the other end of each communication pipe 98 is fixedly connected to the cold storage box 91, so that cold air in the cold storage box 91 can flow to the pressing plate 6 through the communication pipes 98, the pressing plate 6 is cooled, the temperature on the pressing plate 6 is reduced, and the pressing plate 6 can promote freezing of water when pressing water containing ice.
In addition, in order to enable the cold air to be better in contact with the pressing plate 6, the pressing plate 6 is cooled, a cavity 99 is formed in the pressing plate 6, and the communicating pipe 98 is communicated with the cavity 99, so that the cold air can enter the pressing plate 6 to cool the pressing plate 6, and the cooling effect on the inside of the pressing plate 6 is improved.
The implementation principle of the embodiment is as follows: when cold gas blows on the surface of water, can make the surface of water take place to flow, and outlet duct 96 arranges in the front side of pressure flat board 6 for in the water after the ice slag that comes out, pressure flat board 6 still can make level to the surface of water, increases the roughness of the surface of water, reduces air conditioning to the smooth influence of surface of water. After ice and slag are mixed in the water, the water is pre-shaped, and the flow of the water surface is reduced.
The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.
Claims (8)
1. The utility model provides a preparation instrument of racetrack ice surface, includes organism (1), holds feed box (2), conveying pipeline (3), screw conveyer (4), discharging device (5), water storage box (7), raceway (8), flatter (6), its characterized in that: the device also comprises a pre-cooling device (9) for pre-cooling the water;
the pre-cooling device (9) comprises a cold storage box (91), a refrigerating material is stored in the cold storage box (91), a discharge hole (92) is formed in the cold storage box (91), and a sealing plate (93) for sealing the discharge hole (92) is installed on the discharge hole (92);
an exhaust pipe (94) is fixedly connected to the cold storage box (91), the exhaust pipe (94) is communicated with the interior of the cold storage box (91), an exhaust fan (95) is installed at the other end of the exhaust pipe (94), and the exhaust fan (95) extracts cold air in the cold storage box (91) and discharges the cold air;
an air outlet pipe (96) is arranged at the air outlet end of the exhaust fan (95), and the air outlet pipe (96) is fixedly connected to the exhaust fan (95) and is fixedly connected to the air outlet end of the exhaust fan (95); the outlet of the outlet pipe (96) faces the ice layer material.
2. A tool for preparing a racecourse ice surface according to claim 1, wherein: the refrigerating material is selected from ice blocks or liquid nitrogen.
3. A tool for preparing a racecourse ice surface according to claim 1, wherein: an opening expanding piece (97) is arranged at the air outlet end of the air outlet pipe (96);
the flaring piece (97) comprises a connecting pipe (971) fixedly connected with the air outlet pipe (96), and a flaring pipe (972) is fixedly connected to the connecting pipe (971).
4. A tool for preparing a racecourse ice surface according to claim 3, wherein: the screen plate (973) is arranged in the connecting pipe (971), and a plurality of through holes (974) are formed in the screen plate (973).
5. A tool for preparing a racecourse ice surface according to claim 4, wherein: the through holes (974) of the mesh plate (973) are arranged obliquely, and the oblique direction is expanded outwards along the cold air flow direction.
6. A tool for preparing a racecourse ice surface according to claim 4, wherein: two balance pipes (975) are fixedly connected to the expansion pipe (972), and the balance pipes (975) are communicated with the connecting pipe (971) and the expansion pipe (972).
7. A tool for preparing a racecourse ice surface according to claim 1, wherein: the pressure plate (6) is fixedly connected with a plurality of communicating pipes (98), one end of each communicating pipe (98) is fixedly connected with the pressure plate (6), and the other end of each communicating pipe is fixedly connected with the cold storage box (91).
8. A tool for preparing a racecourse ice surface according to claim 7, wherein: a cavity (99) is formed in the pressing plate (6), and the communicating pipe (98) is communicated with the cavity (99).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922493182.1U CN211645843U (en) | 2019-12-31 | 2019-12-31 | Preparation instrument of track ice surface |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922493182.1U CN211645843U (en) | 2019-12-31 | 2019-12-31 | Preparation instrument of track ice surface |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211645843U true CN211645843U (en) | 2020-10-09 |
Family
ID=72702580
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922493182.1U Withdrawn - After Issue CN211645843U (en) | 2019-12-31 | 2019-12-31 | Preparation instrument of track ice surface |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211645843U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111172842A (en) * | 2019-12-31 | 2020-05-19 | 北京华体体育场馆施工有限责任公司 | Preparation tool and process for ice surface of track |
-
2019
- 2019-12-31 CN CN201922493182.1U patent/CN211645843U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111172842A (en) * | 2019-12-31 | 2020-05-19 | 北京华体体育场馆施工有限责任公司 | Preparation tool and process for ice surface of track |
| CN111172842B (en) * | 2019-12-31 | 2024-04-26 | 北京华体体育场馆施工有限责任公司 | Preparation tool and process of racetrack ice surface |
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Granted publication date: 20201009 Effective date of abandoning: 20240426 |
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| AV01 | Patent right actively abandoned |
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