CN216405327U - Ultrasonic wave intelligence integration reservoir gate defroster - Google Patents
Ultrasonic wave intelligence integration reservoir gate defroster Download PDFInfo
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- CN216405327U CN216405327U CN202122859776.7U CN202122859776U CN216405327U CN 216405327 U CN216405327 U CN 216405327U CN 202122859776 U CN202122859776 U CN 202122859776U CN 216405327 U CN216405327 U CN 216405327U
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Abstract
The utility model relates to the technical field of water sluicegates, in particular to an ultrasonic intelligent integrated reservoir gate deicing device which comprises a first supporting plate, a second supporting plate, a deicing mechanism, a water injection mechanism and a pressure sensor, wherein the deicing mechanism comprises a deicing mechanism box, a piezoelectric ceramic transducer and an ultrasonic generator, the pressure sensor and the piezoelectric ceramic transducer are arranged inside the deicing mechanism box, the piezoelectric ceramic transducer is electrically connected with the ultrasonic generator, a gate is arranged between the first supporting plate and the second supporting plate, the gate is provided with a temperature sensor, the first supporting plate and the second supporting plate are both provided with a sliding lifting mechanism, the deicing mechanism box is arranged between the first supporting plate and the second supporting plate through the sliding lifting mechanism, and the water injection mechanism is arranged on the deicing mechanism box. In practical application, under the cooperation of the deicing mechanism and the water injection mechanism of the device, the deicing efficiency of the gate is greatly improved, and the device has the advantages of good deicing effect and low cost.
Description
Technical Field
The utility model relates to the technical field of water conservancy gates, in particular to an ultrasonic intelligent integrated reservoir gate deicing device.
Background
Hydraulic engineering is an engineering constructed for controlling and allocating surface water and underground water in nature to achieve the purpose of benefiting and removing harm. The construction of hydraulic engineering can be used for adjusting discharge, has the flood control effect, can solve local water consumption, rationally distributes water resources, improves shipping conditions, develops sustainable clean energy, promotes the development of tourism industry, increases the irrigation scale, has huge economic benefits. Hydraulic engineering needs to build various types of hydraulic buildings such as dams, dikes, spillways, water gates, water inlets, channels, transition troughs, rafts, fishways and the like so as to achieve the aims.
The gate is a control facility for closing and opening the drainage (tapping) passage. The gate can be used for intercepting water flow, controlling water level, regulating flow, discharging silt and floating objects and the like. When the temperature is lower in the north, water conservancy gate upper portion can freeze in a large number, has both influenced the gate and has reciprocated, makes the unable normal open of gate, also can make the gate produce frost heaving destruction, causes certain economic loss.
In the prior art, the traditional deicing methods comprise an ice cover cutting method, a compressed air bubble blowing method, a heat insulation plate method and a pressure water jet method. The ice cover cutting method is used for preventing water in front of the gate from freezing, a non-icing groove is formed in front of the gate, and the width of the groove is generally 0.5-1.5 m. In the past, manual deicing is mostly adopted for the front edge of the gate with a short anti-freezing line and a small ice layer thickness, the manual deicing can be implemented only when the thickness of an ice cover in front of the gate reaches the thickness capable of bearing double ice operation, and the subsequent mechanical slotting can improve the slotting speed, but broken ice still needs to be manually fished out. The manual method is not safe and has poor anti-icing effect, and is gradually eliminated.
The principle of the compressed air bubbling method is that compressed air is released through a pipeline which is deep into water, and water flow with higher temperature is driven by bubbles to be jetted to the water surface or an ice cover to form strong turbulent water flow, so that an ice layer on the water surface is melted or icing is inhibited. The anti-icing system adopting the compressed air bubbling method comprises an air compressor, an air supply pipe, a diffusion pipe and the like. When the distance between the blowing nozzle and the gate is not properly selected, the oxygen content of the water body near the gate is increased, and the corrosion speed of the gate is accelerated. And (3) carrying out maintenance and pressure tests on each pipeline before the system is put into operation every year, and detaching and storing the rubber tube and the parts below the rubber tube after the icing period is finished. The method has the advantages of simple construction and good anti-icing effect, but has higher power consumption and higher later maintenance cost.
The heat insulation board method is to spread polystyrene plastic foam in front of the gate, and the boards are connected tightly without any crack. The width and thickness of each plate are determined by calculation according to the maximum thickness of ice and construction requirements. By adopting the method, a non-freezing area can be formed in front of the gate, so that the water in front of the gate is prevented from freezing, and the gate can be freely opened and closed. The method has the disadvantages that the heat-preservation blank plate needs to be manually installed before the winter comes, and the blank plate needs to be manually dismantled after the winter comes. When the double-person ice-making machine is installed, construction workers need to drive the ship to the front of the gate or can operate the double-person ice-making machine when the thickness of the ice cover in front of the gate reaches the thickness capable of bearing double-person ice-making operation, the installation quality is greatly influenced by human factors and is unsafe, and automatic operation cannot be achieved.
The principle of the pressure water jet method is that water with relatively high underwater temperature is released in front of a gate through a submersible pump and a pipeline, and a non-icing area is formed in front of the gate by stirring a water body through discharged water flow. But the material of general gate is alloy or alloy and concrete composite construction, when receiving the higher water of adoption temperature after cold, can exert an influence to the alloy material stress distribution on gate surface, after many cold and hot alternates, can make the material on gate surface local stress concentration appear to produce local fragility and chap, make the life-span greatly reduced of gate.
Therefore, an intelligent ultrasonic integrated reservoir gate deicing device is needed.
SUMMERY OF THE UTILITY MODEL
The utility model provides an ultrasonic intelligent integrated reservoir gate deicing device, which aims to solve the problems that the frozen water surface influences the up-and-down movement of a gate and the gate is damaged due to frost heaving when the temperature is low.
In order to achieve the purpose, the utility model provides an ultrasonic intelligent integrated reservoir gate deicing device, which comprises: the deicing device comprises a first supporting plate, a second supporting plate, a deicing mechanism, a water injection mechanism and a pressure sensor;
the deicing mechanism comprises a deicing mechanism box, a piezoelectric ceramic transducer and an ultrasonic generator, the pressure sensor and the piezoelectric ceramic transducer are both arranged in the deicing mechanism box, and the piezoelectric ceramic transducer is electrically connected with the ultrasonic generator, wherein the action frequency of the ultrasonic generator is 38-42kHz, and the power is 1000-1400 w;
the utility model discloses a deicing mechanism, including first backup pad, second backup pad, water injection mechanism, water injection
Preferably, the sliding lift mechanism includes: the lifting motor, the conical gear and the threaded rod are arranged;
the first threaded rod is arranged in the first sliding groove, one end of the first threaded rod is connected with a first bevel gear arranged on the first supporting plate, and the first bevel gear is driven by a first lifting motor;
the second threaded rod is arranged in the second sliding groove, one end of the second threaded rod is connected with a second bevel gear arranged on the second supporting plate, and the second bevel gear is driven by a second lifting motor.
Preferably, the two ends of the deicing mechanism box provided with threads are respectively connected with a first threaded rod and a second threaded rod, so that the deicing mechanism box can move longitudinally along the surface of the gate.
Preferably, the deicing mechanism box is cuboid, and the deicing mechanism box is made of stainless steel.
Preferably, the piezoelectric ceramic type transducer is not less than 1.
Preferably, the action frequency of the ultrasonic generator is 40kHz, and the power is 1200 w.
Preferably, the water injection mechanism comprises a C-shaped water injection pipe, a telescopic hose and a water pump;
one end of the telescopic hose is connected with the C-shaped water injection pipe, the other end of the telescopic hose is connected with the water pump, and a water diversion valve is arranged on the telescopic hose.
Preferably, the C-shaped water injection pipe is horizontally arranged on the deicing mechanism box, and a strip-shaped hole is formed in the C-shaped water injection pipe so as to inject water into a crack between the deicing mechanism box and an ice layer.
Preferably, the flexible hose is a telescopic hose.
Preferably, the material of the telescopic hose is stainless steel.
According to the technical scheme, the ultrasonic intelligent integrated reservoir gate deicing device is applied, in the practical application process, when the temperature sensor arranged on the gate detects that the atmospheric temperature is lower than 0 ℃, the deicing mechanism box is moved to the position parallel to the water surface of the gate from the position above the water surface of the gate through the sliding lifting mechanism, at the moment, the icing expansion of water enables the surface of the deicing mechanism box facing the water surface to start to deform along with the further reduction of the temperature, when the pressure sensor detects that the pressure value exceeds the set value, the action frequency of the ultrasonic generator is set to be 38-42kHz, the power is 1000-1400w and acts on the piezoelectric ceramic transducer, the piezoelectric ceramic transducer is enabled to carry out ultrasonic vibration, so that the gate is separated from the water injection layer, then the water is injected into the crack between the deicing mechanism box and the ice layer through the ultrasonic mechanism, the deicing device can effectively deice the gate, avoids the ice layer from freezing the gate, influences the lifting of the gate and damages the gate, and has the advantages of simplicity and convenience in operation, good deicing effect, high efficiency, low cost, easiness in maintenance, intellectualization and the like.
Meanwhile, the action frequency of the ultrasonic generator is set to be 40kHz, the power is 1200w, and the deicing effect under the condition of water injection can be effectively improved.
Through setting up temperature sensor and pressure sensor, can accurately master icing time to according to the pressure size that the inflation that freezes of water applyed to deicing mechanism case, in time carry out the deicing to gate department.
By arranging the telescopic hose, the telescopic hose can be extended or shortened along with the lifting of the deicing mechanism box.
Drawings
FIG. 1 is a schematic structural diagram of an ultrasonic intelligent integrated reservoir gate deicing device;
fig. 2 is a schematic structural diagram of a deicing mechanism box of the ultrasonic intelligent integrated reservoir gate deicing device.
Description of the reference numerals
A gate 1; a first support plate 2; a second support plate 3;
a deicing mechanism 4; a deicing mechanism case 41; a piezoelectric ceramic transducer 42; an ultrasonic generator 43;
a slide lifting mechanism 5; a lift motor 51; a first lift motor 511; a second lift motor 512;
a bevel gear 52; a first bevel gear 521; a second bevel gear 522;
a threaded rod 53; a first threaded rod 531; second threaded rod 532;
a water injection mechanism 6; a C-type water injection pipe 61; a flexible hose 62;
a water diversion valve 7.
Detailed Description
The following detailed description of embodiments of the utility model refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating embodiments of the utility model, are given by way of illustration and explanation only, not limitation.
In the present invention, unless otherwise stated, the terms of orientation such as "up, down, left, and right" are generally used to refer to the directions of up, down, left, and right of the ultrasonic intelligent integrated reservoir gate deicing apparatus shown in fig. 1.
The utility model provides an ultrasonic intelligent integrated reservoir gate deicing device, which comprises a first supporting plate 2, a second supporting plate 3, a deicing mechanism 4, a water injection machine 6 and a pressure sensor, wherein the first supporting plate and the second supporting plate are respectively connected with the water injection machine 6;
the deicing mechanism 4 comprises a deicing mechanism box 41, a piezoelectric ceramic transducer 42 and an ultrasonic generator 43, the pressure sensor and the piezoelectric ceramic transducer 42 are both arranged inside the deicing mechanism box 41, the piezoelectric ceramic transducer 42 is electrically connected with the ultrasonic generator 43, wherein the action frequency of the ultrasonic generator 43 is 38-42kHz, and the power is 1000-1400 w;
In the embodiment of the present invention, preferably, the piezoelectric ceramic transducer 42 and the pressure sensor are both disposed on the inner side surface of the deicing mechanism case 41 facing the water.
According to the technical scheme, the ultrasonic intelligent integrated reservoir gate deicing device is applied, in the practical application process, when the temperature sensor arranged on the gate detects that the atmospheric temperature is lower than 0 ℃, the deicing mechanism box is moved to the position parallel to the water surface of the gate from the position above the water surface of the gate through the sliding lifting mechanism, at the moment, the icing expansion of water enables the surface of the deicing mechanism box facing the water surface to start to deform along with the further reduction of the temperature, when the pressure sensor detects that the pressure value exceeds the set value, the action frequency of the ultrasonic generator is set to be 38-42kHz, the power is 1000-1400w and acts on the piezoelectric ceramic transducer, the piezoelectric ceramic transducer is enabled to carry out ultrasonic vibration, so that the gate is separated from the water injection layer, then the water is injected into the crack between the deicing mechanism box and the ice layer through the ultrasonic mechanism, the deicing device can effectively deice the gate, avoids the ice layer from freezing the gate, influences the lifting of the gate and damages the gate, and has the advantages of simplicity and convenience in operation, good deicing effect, high efficiency, low cost, easiness in maintenance, intellectualization and the like.
According to a preferred embodiment of the present invention, the slide lifting mechanism 5 includes: a lifting motor 51, a bevel gear 52 and a threaded rod 53;
the first threaded rod 531 is arranged in the first sliding chute, one end of the first threaded rod 531 is connected with a first conical gear 521 arranged on the first supporting plate 2, and the first conical gear 521 is driven by a first lifting motor 511;
a second threaded rod 532 is arranged in the second sliding groove, one end of the second threaded rod 532 is connected with a second bevel gear 522 arranged on the second supporting plate 3, and the second bevel gear 522 is driven by the second lifting motor 512.
Further, both ends of the deicing mechanism case 41 provided with threads are connected with a first threaded rod 531 and a second threaded rod 532, respectively, for moving the deicing mechanism case 41 longitudinally along the surface of the shutter 1.
Further, the deicing mechanism box 41 is rectangular, and the deicing mechanism box 41 is made of stainless steel.
Further, the piezoelectric ceramic type transducers 42 are not less than 1.
Further, the ultrasonic generator 43 has an action frequency of 40kHz and a power of 1200 w.
In the embodiment of the utility model, in practical application, the first lifting motor 511 and the second lifting motor 512 respectively drive the first bevel gear 521 and the second bevel gear 522 to rotate synchronously, and then the first bevel gear 521 and the second bevel gear 522 respectively drive the first threaded rod 531 and the second threaded rod 532 to rotate, so that the deicing mechanism box 41 is driven to move up and down on the surface of the gate 1 in the process of synchronous rotation of the first threaded rod 531 and the second threaded rod 532, and specifically, the deicing mechanism box 41 is moved to a position parallel to the water surface of the gate 1 according to the actual specific position of the water surface of the gate 1, so as to be suitable for different water levels. Further, the number of the piezo-ceramic transducers 42 may be increased as needed to increase the speed of the de-icing. Preferably, the ultrasonic generator 43 has an action frequency of 40kHz and a power of 1200w, so as to increase the deicing speed in the case of water injection.
According to a preferred embodiment of the present invention, the water injection mechanism 6 includes a C-type water injection pipe 61, a flexible hose 62, and a water pump;
one end of the telescopic hose 62 is connected with the C-shaped water injection pipe 61, the other end of the telescopic hose 62 is connected with the water pump, and the telescopic hose 62 is provided with a water diversion valve 7.
Further, the C-shaped water injection pipe 61 is horizontally arranged on the deicing mechanism box 41, and a strip-shaped hole is formed in the C-shaped water injection pipe 61 and used for injecting water into a crack between the deicing mechanism box 41 and an ice layer.
Further, the extension hose 62 is an extension tube.
Further, the flexible hose 62 is made of stainless steel.
In the embodiment of the present invention, in practical application, the operating frequency of the ultrasonic generator 43 is set, the piezoelectric ceramic transducer 42 is vibrated at a set frequency, so that the ice layer on the gate 1 is instantaneously separated from the gate 1, and at this time, the water inlet valve 7 is further opened, water is injected into the crack between the deicing mechanism box 41 and the ice layer from the strip-shaped hole of the C-shaped water injection pipe 61, so that the deicing speed can be greatly increased by the ultrasonic cavitation. Preferably, the size of the strip-shaped hole can be set according to the actual water injection requirement. The flexible hose 62 may also be a bent pipe for bending or straightening with the ascending and descending of the deicing mechanism box 41.
In the embodiment of the utility model, the basic principle of ultrasonic deicing of the ultrasonic intelligent integrated reservoir gate deicing device is as follows: the ultrasonic vibration generated by the piezoelectric ceramic transducer 42 under the action of the ultrasonic generator 43 is transmitted to the surface to be deiced, and is transmitted on the surface in a plate wave form, and is reflected and superposed at the boundary to form standing waves; due to the difference of physical properties between the ice medium and the surface medium to be deiced, ultrasonic waves form a group velocity difference between interface layers of the ice medium and the surface medium to be deiced: the relative movement causes internal forces to be generated between the layers, wherein the existence of transverse shearing force is the most main factor for causing the ice layer to peel off the gate 1 so as to achieve the deicing effect. Furthermore, the water injection mechanism 6 is used for transmitting ultrasonic waves in water, transverse waves disappear at the moment, cavitation is generated on the surface of the ice body under the rapid stretching and compressing action of longitudinal waves, and a large amount of energy is released to continuously damage the ice layer, so that the effect of rapid deicing is achieved.
The working principle and the using process of the ultrasonic intelligent integrated reservoir gate deicing device are as follows: when a temperature sensor arranged on the gate 1 detects that the atmospheric environment is lower than 0 ℃, the deicing mechanism box 41 is moved to a position parallel to the water surface of the gate from the position above the water surface of the gate 1 through the sliding lifting mechanism 5, at the moment, the water is frozen and expands to enable the surface of the deicing mechanism box facing the water surface to start to deform along with further reduction of the temperature, when the deformation exceeds a set value, the ultrasonic generator 43 is opened to act on the piezoelectric ceramic transducer 42, the piezoelectric ceramic transducer 42 performs ultrasonic vibration to deice the position of the gate 1, when the ice surface is separated from the gate 1, the water guide valve 7 is opened to enable the water to be injected into cracks between the deicing mechanism box 41 and the ice layer through the telescopic hose 62 and the C-shaped water injection pipe 61 in sequence, and under the ultrasonic cavitation effect, the deicing effect on the ice surface at the position of the gate 1 is improved. Wherein, preferably, when the temperature is higher than 0 ℃, the default deicing mechanism box 41 is above the water surface of the gate 1.
The following description will be made on the deicing results with and without water injection by setting the frequency of the ultrasonic generator 43 to be 40kHz, the power to be 1200w, and the number of the piezoelectric ceramic transducers 42 to be one, and specifically refer to table 1 below.
TABLE 1
As can be seen from table 1, if the deicing effect is very limited without water injection and ultrasonic, the deicing effect can be greatly improved under the water injection condition.
Further, the number of the piezoelectric ceramic transducers 42 is set to be one, water is injected, and the deicing result is described under the conditions that the action frequency of the ultrasonic generator 43 is 28kHz, the power is 1200w, the action frequency of the ultrasonic generator 43 is 40kHz, and the power is 1200w, specifically referring to table 2 below.
TABLE 2
As can be seen from table 2, under the water injection condition, the action frequency of the ultrasonic generator 43 is 40kHz, the power is 1200w, and compared with the action frequency of the ultrasonic generator 43 being 28kHz, the power is 1200w, the deicing effect can be greatly improved. Specifically, in the same time, the maximum thickness of the ultrasonic generator 43 capable of deicing reaches 49.1mm when the action frequency is 40kHz and the power is 1200w, and the maximum thickness of the ultrasonic generator 43 capable of deicing reaches only 27mm when the action frequency is 28kHz and the power is 1200 w.
In the practical application process, when the temperature sensor arranged on the gate detects that the atmospheric temperature is lower than 0 ℃, the deicing mechanism box is moved to the position parallel to the water surface of the gate from the position above the water surface of the gate through the sliding lifting mechanism, at the moment, the surface of the deicing mechanism box facing the water surface starts to deform along with the further reduction of the temperature, when the pressure sensor detects that the pressure value exceeds a set value, the action frequency of the ultrasonic generator is set to be 38-42kHz, the power is 1000-, the deicing device can effectively deice the gate, avoids the ice layer from freezing the gate, influences the lifting of the gate and damages the gate, and has the advantages of simplicity and convenience in operation, good deicing effect, high efficiency, low cost, easiness in maintenance, intellectualization and the like.
The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited thereto. Within the scope of the technical idea of the utility model, many simple modifications may be made to the technical solution of the utility model, and in order to avoid unnecessary repetition, various possible combinations of the utility model will not be described further. Such simple modifications and combinations should be considered within the scope of the present disclosure as well.
Claims (10)
1. The ultrasonic intelligent integrated reservoir gate deicing device is characterized by comprising a first supporting plate (2), a second supporting plate (3), a deicing mechanism (4), a water injection mechanism (6) and a pressure sensor;
the deicing mechanism (4) comprises a deicing mechanism box (41), a piezoelectric ceramic transducer (42) and an ultrasonic generator (43), the pressure sensor and the piezoelectric ceramic transducer (42) are arranged inside the deicing mechanism box (41), the piezoelectric ceramic transducer (42) is electrically connected with the ultrasonic generator (43), wherein the action frequency of the ultrasonic generator (43) is 38-42kHz, and the power is 1000-;
first backup pad (2) with be provided with gate (1) between second backup pad (3), be provided with temperature sensor on gate (1), first backup pad (2) with be provided with first spout and second spout on the relative medial surface of second backup pad (3) respectively, first backup pad (2) with all be provided with slip elevating system (5) on second backup pad (3), deicing mechanism case (41) pass through slip elevating system (5) set up first spout with between the second spout, so that make deicing mechanism case (41) are followed gate (1) surface longitudinal movement, water injection mechanism (6) set up on deicing mechanism case (41), in order to be used for pouring water in the crack between deicing mechanism case (41) and the ice sheet.
2. The intelligent ultrasonic integrated reservoir gate deicing device according to claim 1, characterized in that the sliding lifting mechanism (5) comprises: a lifting motor (51), a bevel gear (52) and a threaded rod (53);
a first threaded rod (531) is arranged in the first sliding groove, one end of the first threaded rod (531) is connected with a first conical gear (521) arranged on the first supporting plate (2), and the first conical gear (521) is driven by a first lifting motor (511);
a second threaded rod (532) is arranged in the second sliding groove, one end of the second threaded rod (532) is connected with a second bevel gear (522) arranged on the second supporting plate (3), and the second bevel gear (522) is driven by a second lifting motor (512).
3. An ultrasonic intelligent integrated reservoir gate deicing device according to claim 2, characterized in that the two ends of the deicing mechanism box (41) provided with threads are respectively connected with a first threaded rod (531) and a second threaded rod (532) for enabling the deicing mechanism box (41) to move longitudinally along the surface of the gate (1).
4. The intelligent ultrasonic integrated reservoir gate deicing device according to claim 1, wherein the deicing mechanism box (41) is rectangular parallelepiped, and the deicing mechanism box (41) is made of stainless steel.
5. The intelligent ultrasonic integrated reservoir gate deicing device according to claim 1, characterized in that said piezoelectric ceramic transducers (42) are not less than 1.
6. An ultrasonic intelligent integrated reservoir gate deicing device according to claim 1, characterized in that the action frequency of the ultrasonic generator (43) is 40kHz and the power is 1200 w.
7. The intelligent ultrasonic integrated reservoir gate deicing device according to claim 1, characterized in that the water injection mechanism (6) comprises a C-shaped water injection pipe (61), a flexible hose (62) and a water pump;
one end of the telescopic hose (62) is connected with the C-shaped water injection pipe (61), the other end of the telescopic hose is connected with the water pump, and a water diversion valve (7) is arranged on the telescopic hose (62).
8. The intelligent ultrasonic integrated reservoir gate deicing device according to claim 7, wherein the C-shaped water injection pipe (61) is horizontally arranged on the deicing mechanism box (41), and a strip-shaped hole is formed in the C-shaped water injection pipe (61) and used for injecting water into a crack between the deicing mechanism box (41) and an ice layer.
9. The ultrasonic intelligent integrated reservoir gate deicing device according to claim 7, characterized in that the flexible hose (62) is a telescopic hose.
10. The intelligent ultrasonic integrated reservoir gate deicing device according to claim 7, wherein the flexible hose (62) is made of stainless steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122859776.7U CN216405327U (en) | 2021-11-18 | 2021-11-18 | Ultrasonic wave intelligence integration reservoir gate defroster |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122859776.7U CN216405327U (en) | 2021-11-18 | 2021-11-18 | Ultrasonic wave intelligence integration reservoir gate defroster |
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| Publication Number | Publication Date |
|---|---|
| CN216405327U true CN216405327U (en) | 2022-04-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122859776.7U Expired - Fee Related CN216405327U (en) | 2021-11-18 | 2021-11-18 | Ultrasonic wave intelligence integration reservoir gate defroster |
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- 2021-11-18 CN CN202122859776.7U patent/CN216405327U/en not_active Expired - Fee Related
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