CN115676248A - Support protection system for belt conveyor without concrete foundation - Google Patents
Support protection system for belt conveyor without concrete foundation Download PDFInfo
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- CN115676248A CN115676248A CN202211400694.9A CN202211400694A CN115676248A CN 115676248 A CN115676248 A CN 115676248A CN 202211400694 A CN202211400694 A CN 202211400694A CN 115676248 A CN115676248 A CN 115676248A
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- belt conveyor
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Abstract
The invention discloses a support protection system for a belt conveyor without a concrete foundation, which comprises: support the protection monomer, support the protection monomer and include: the bottom of the hydraulic oil cylinder is fixed on the upper side of a head unloading device of the belt conveyor, a piston rod of the hydraulic oil cylinder is arranged in an upward inclined mode and is deviated to the tail of the belt conveyor, the lower side of the support plate is fixedly connected with the end part of the piston rod of the hydraulic oil cylinder, a plurality of pointed bulges are fixedly connected with the support plate at the lower end, the upper end of the support plate is used for being inserted into a coal bed at the top of a roadway under the thrust action of the hydraulic oil cylinder so as to fix the belt conveyor, and the ground fixing beam is located below the hydraulic oil cylinder and is embedded in the coal bed of the roadway at the lower side of the belt conveyor; according to the invention, the belt conveyor is fixed with the top and the bottom of the roadway together, so that the belt conveyor and the roadway form a whole, and the problem that the left side fixing frame and the right side fixing frame are not horizontal to output different shafts due to sinking of two sides of the roadway when the bottom of the roadway has a vault is avoided.
Description
Technical Field
The invention belongs to the field of mining belt conveyors, and particularly relates to a support protection system for a belt conveyor without a concrete foundation.
Background
The mining belt conveyor has the characteristics of large conveying capacity, long conveying distance, strong universality and the like, is a main conveying system of most coal mines, and plays an extremely important role in the modern coal mine production. With the application of the belt conveyor with high belt speed, long distance and large conveying capacity, the dynamic performance analysis and the modular design, the design without foundation, the automatic tensioning and the intelligent control system of the belt conveyor are important problems to be solved urgently, and the belt conveyor has important significance for the safe, efficient, intelligent and energy-saving production and the improvement of economic benefits of the belt conveyor in the coal mine.
At present, the length of a single machine of an international upper belt conveyor exceeds 30.4km, the speed of a rubber belt reaches 12ms, the power of a single conveyor exceeds 25000kW, and various control theories and driving control devices are also continuously generated. The belt conveyor is developing towards long distance, high speed, high power and other directions, the dynamic problem is gradually highlighted, and the main focus is that:
(1) The belt conveyor is started too violently, so that the tension of the rubber belt is increased sharply, the system is unstable in operation, and the safety coefficient of the rubber belt is reduced.
(2) The rubber belt runs unstably on the roller, generates vibration in all directions, and causes material scattering, rubber belt deviation and reduction of the service life of the carrier roller.
Therefore, based on the above problems, stabilization of the belt conveyor is a primary problem, and it is very important to solve the problem that the belt conveyor is unstable during transportation.
Disclosure of Invention
The invention aims to provide a support protection system for a concrete-free foundation belt conveyor, which aims to solve the problems that the roller stress concentration is increased in the starting process and a rack is unstable due to impact and vibration in the operation process of the existing foundation-free belt conveyor.
The invention adopts the following technical scheme: a support and protection system for a concrete-free base belt conveyor, comprising: the supporting and protecting monomers are arranged at two sides of the belt conveyor and are used for supporting and protecting the belt conveyor,
the support protection unit includes:
the bottom of the hydraulic oil cylinder is fixed on the upper side of the head unloading device of the belt conveyor, the piston rod of the hydraulic oil cylinder is arranged in an upward inclined way and is deviated to the tail part of the belt conveyor,
a support plate which is horizontally arranged, the lower side of the support plate is fixedly connected with the end part of a piston rod of the hydraulic oil cylinder,
a plurality of pointed bulges are positioned on the upper side of the supporting plate, the lower ends of the pointed bulges are fixedly connected with the supporting plate, the upper ends of the pointed bulges are used for being inserted into a coal seam at the top of the roadway under the thrust action of the hydraulic oil cylinder so as to fix the belt conveyor,
and the ground fixing beam is positioned below the hydraulic oil cylinder, is embedded in the roadway coal seam on the lower side of the belt conveyor, is connected with a fixing frame bolt of the belt conveyor, and is used for fixing and protecting the belt conveyor.
Furthermore, the supporting and protecting units are arranged on two sides of the belt conveyor uniformly.
Furthermore, six supporting and protecting units are arranged and are respectively arranged on two sides of the driving device, two sides of the transmission device and two sides of the unloading device.
Further, when the supporting protection unit is disposed at the driving device, the supporting protection unit further includes:
a left pull rod which is obliquely arranged and is positioned at the left side of the belt conveyor, the upper end of the left pull rod is fixedly connected with the upper side of the belt conveyor, the lower end of the left pull rod is fixedly connected with a left driving fixing frame of the driving device,
the right pull rod is obliquely arranged and is positioned on the right side of the belt conveyor, the upper end of the right pull rod is fixedly connected with the upper side of the belt conveyor, the lower end of the right pull rod is fixedly connected with the right driving fixing frame of the driving device, and the left driving fixing frame and the right driving fixing frame of the driving device are kept in a horizontal state by being matched with the left pull rod, so that the problem that the output axes of the driving device are not overlapped due to sinking of two sides of a roadway when the bottom of the roadway is arched is solved.
Further, left side drive mount and right side drive mount all include:
a motor fixing frame, a motor of a driving device is fixedly connected on the motor fixing frame,
and the speed reducer fixing frame is fixedly connected with a speed reducer of the driving device and used for enabling the speed reducer of the driving device to coincide with the output axis of the driving device.
Further, when the supporting and protecting unit is provided at the driving device,
the lower end of the left pull rod is fixedly connected with the left side of the speed reducer fixing frame,
the lower end of the right pull rod is fixedly connected with the right side of the speed reducer fixing frame,
the support protection unit further includes:
the left pull rope is obliquely arranged and positioned on the left side of the belt conveyor, the inclination angle of the left pull rope is larger than that of the left pull rod, the upper end of the left pull rope is fixed on the upper side of the belt conveyor, the lower end of the left pull rope is fixed on the left side of the motor fixing frame,
the right side stay cord inclines, and is located the right side of belt conveyor, and its inclination is greater than the inclination of right side pull rod, and its upper end is fixed in the upside of belt conveyor, and its lower extreme is fixed in the right side of motor mount for cooperate with the output axis coincidence of drive arrangement's speed reducer and motor with left side stay cord each other, and then when avoiding tunnel bottom to appear the ground arch, the output axis that the tunnel both sides sink and lead to does not coincide.
Further, the method also comprises the following steps: the belt tension measuring device is positioned on the driving transmission frame on the lower side of the middle driving device of the belt conveyor and is used for detecting the tension of a belt;
the belt tension measuring device includes:
a front supporting frame which is vertically arranged, the lower end of the front supporting frame is fixedly connected with the upper side of a driving transmission frame of the middle driving device,
a rear supporting frame which is vertically arranged, the lower end of the rear supporting frame is fixedly connected with the upper side of a driving transmission frame of the middle driving device and is symmetrically arranged with the front supporting frame,
a first direction-changing roller, both ends of which are respectively fixed on the right sides of the front supporting frame and the rear supporting frame, for guiding a belt extending into the lower side of the first direction-changing roller from right to left in front of the front supporting frame and the rear supporting frame,
a supporting upright rod which is vertically arranged, is positioned between the front supporting frame and the rear supporting frame, and the lower end of the supporting upright rod is fixed on the upper side of a driving transmission frame of the middle driving device,
a movable cross bar positioned between the front supporting frame and the rear supporting frame, the right end of the movable cross bar is hinged with the upper end of the supporting upright rod, the left end of the movable cross bar extends leftwards,
the second bend pulley is fixed on the upper side of the movable cross rod and is used for upwards supporting the belt passing through the lower side of the first bend pulley and bearing the tension from the belt along the same way,
and the pressure sensor is positioned at the lower side of the left end of the movable cross rod, is fixed at the upper side of the driving transmission frame of the middle driving device and is used for measuring and sending the tension of the left end of the movable cross rod so as to detect the tension of the belt.
The invention has the beneficial effects that: according to the invention, the belt conveyor is fixed with the top and the bottom of the roadway by arranging the plurality of supporting and protecting monomers, so that the belt conveyor and the roadway form a whole, and the problem that when the bottom of the roadway is arched, the left side fixing frame and the right side fixing frame are not horizontal due to sinking of two sides of the roadway, so that output axes are not coincident is avoided; and then the problem of instability caused by overexcitation and vibration in the running process of the baseless belt conveyor is solved.
Drawings
FIG. 1 is a front view of the present invention;
FIG. 2 is a side view of the present invention;
FIG. 3 is a schematic view showing the structure of the belt tension measuring device of the present invention.
Wherein: 1. a hydraulic cylinder; 2. a support plate; 3. a pointed protrusion; 4. a ground reinforcing beam; 5. a left side pull rod; 6. a right side pull rod; 7. a left side pull rope; 8. a right side pull rope; 9. a drive device; 10. a transmission device; 11. an unloading device; 21. a first direction-changing drum; 22. a front support frame; 23. a belt; 24. a movable cross bar; 25. a second direction-changing drum; 26. a pressure sensor; 27. a third direction-changing drum; 28. and supporting the vertical rod.
Detailed Description
The invention is described in detail below with reference to the drawings and the detailed description.
The invention discloses a supporting and protecting system for a belt conveyor without a concrete foundation, which comprises the following components as shown in figures 1 and 2: the supporting and protecting single bodies are arranged on two sides of the belt conveyor and used for supporting and protecting the belt conveyor.
The support protection unit includes: the hydraulic cylinder 1, the supporting plate 2, a plurality of pointed bulges 3 and a ground fixing beam 4, wherein the bottom of the hydraulic cylinder 1 is fixed on the upper side of a head unloading device of the belt conveyor, a piston rod of the hydraulic cylinder 1 is arranged in an upward inclined manner and is deviated from the tail part of the belt conveyor, the inclined angle of the piston rod is preferably 60 degrees, the supporting plate 2 is horizontally arranged, the lower side of the supporting plate 2 is fixedly connected with the end part of the piston rod of the hydraulic cylinder 1, the pointed bulges 3 are positioned on the upper side of the supporting plate 2, the lower ends of the pointed bulges 3 are fixedly connected with the supporting plate 2, the upper ends of the pointed bulges 3 are used for being inserted into a roadway top coal bed under the upward thrust action of the hydraulic cylinder 1, the belt conveyor is further fixed, the ground fixing beam 4 is positioned below the hydraulic cylinder 1 and is buried in the roadway coal bed on the lower side of the belt conveyor, the ground fixing beam 4 is connected with a fixing frame bolt of the belt conveyor, and the ground fixing beam 4 is used for fixing and protecting the belt conveyor.
The supporting and protecting units are arranged in a plurality of modes, and the supporting and protecting units are uniformly arranged on two sides of the belt conveyor respectively. Preferably, six supporting and protecting units are arranged on two sides of the driving device, two sides of the transmission device and two sides of the unloading device respectively.
When the supporting protection unit is disposed at the driving device, the supporting protection unit further includes: left side pull rod 5, right side pull rod 6, left side pull rod 5 slope sets up, and left side pull rod 5 is located the left side of belt conveyor, the upper end of left side pull rod 5 and the upside fixed connection of belt conveyor, the lower extreme of left side pull rod 5 and drive arrangement's left side drive mount fixed connection. The slope of right side pull rod 6 sets up, right side pull rod 6 is located belt conveyor's right side, the upper end of right side pull rod 6 and belt conveyor's upside fixed connection, the lower extreme of right side pull rod 6 and drive arrangement's right side drive mount fixed connection, right side pull rod 6 is used for keeping drive arrangement left side drive mount and right side drive mount at the horizontality with left side pull rod 5 mutually supporting, and then when avoiding the vault to appear in the bottom of the roadway, the drive arrangement output axis that the sinking of tunnel both sides leads to does not coincide problem.
Left side drive mount and right side drive mount all include: the driving device comprises a motor fixing frame and a speed reducer fixing frame, wherein a motor of the driving device is fixedly connected to the motor fixing frame, a speed reducer of the driving device is fixedly connected to the speed reducer fixing frame, and the driving fixing frame is used for enabling the speed reducer of the driving device to coincide with the output axis of the motor of the driving device.
When supporting the protection monomer setting when drive arrangement department, the lower extreme of left side pull rod 5 and the left side fixed connection of speed reducer mount, the lower extreme of right side pull rod 6 and the right side fixed connection of speed reducer mount support the protection monomer and still include: left side stay cord 7, right side stay cord 8, the slope of left side stay cord 7 sets up, and be located belt conveyor's left side, the inclination of left side stay cord 7 is greater than the inclination of left side pull rod 5, the upside at belt conveyor is fixed to the upper end of left side stay cord 7, the left side at the motor mount is fixed to the lower extreme of left side stay cord 7, the slope of right side stay cord 8 sets up, and be located belt conveyor's right side, the inclination of right side stay cord 8 is greater than the inclination of right side pull rod 6, the upside at belt conveyor is fixed to the upper end of right side stay cord 8, the right side at the motor mount is fixed to the lower extreme of right side stay cord 8, right side stay cord 8 is used for making drive arrangement's speed reducer and the coincidence of the output axis of motor with left side stay cord 7 mutually supporting, and then when avoiding the vault to appear in the bottom of the tunnel, the output axis that the tunnel both sides sink to lead to does not coincide. Since the motor of the drive device is 36750, the drive device is heavy, and the output must be coaxial, and therefore, the drive device is fixed by providing a pull rod and a pull rope.
Left side stay cord 7 and right side stay cord 8 are the same with the basic action of left side pull rod 5 and right side pull rod 6, but the scene that is suitable for is different, and the mount that corresponds adopts the pull rod to fix when being nearer apart from belt conveyor, and the mount that corresponds adopts the stay cord to fix when being far away from belt conveyor because the pull rod belongs to rigid connection, the stay cord belongs to elastic connection, can utilize pull rod and stay cord cooperation simultaneously to fix moreover, and the effect is better.
According to the invention, a plurality of supporting and protecting monomers are arranged, a belt conveyor is fixed with the top of a roadway through a hydraulic oil cylinder 1, the belt conveyor is fixed with the bottom of the roadway through a ground fixing beam 4, so that the belt conveyor and the roadway form a whole, when the belt conveyor is in a transportation process, the impact of vibration caused by belt transportation on the belt conveyor can be effectively avoided, the pointed bulge 3 and the ground fixing beam 4 are mutually matched to fix the belt conveyor, and in addition, as a motor of a driving device of the belt conveyor is 367500 heavy, after long-time service, foundations on two sides of the roadway sink, so that the middle part of the roadway is higher, and two sides of the roadway sink, the motor and a driving device of the belt conveyor output different shafts, and the motor can be damaged, in order to avoid the problem, the motor fixing frame and a speed reducer fixing frame of the driving device are kept in a horizontal state through mutual matching of a pull rope and a pull rod, and when an arch crown appears on the bottom of the roadway, the left side driving fixing frame and the right side driving fixing frame which are caused by sinking of the two sides of the roadway do not horizontally influence the driving effect on the driving effect; and then the problem of instability caused by overexcitation and vibration in the running process of the baseless belt conveyor is solved.
As shown in fig. 3, the present invention further includes a tension measuring device on the drive transmission frame on the lower side of the intermediate drive of the belt conveyor, which is used to detect the tension of the belt 23.
The tension measuring device includes: preceding braced frame 22, back braced frame, first direction changing drum 21, support pole setting 28, activity horizontal pole 24, second direction changing drum 25, pressure sensor 26, the vertical setting of preceding braced frame 22, preceding braced frame 22's lower extreme and middle drive arrangement's drive transmission frame upside fixed connection, the vertical setting of back braced frame, back braced frame's lower extreme and middle drive arrangement's drive transmission frame upside fixed connection, and with preceding braced frame 22 symmetry setting.
The both ends of first cylinder 21 that change are fixed respectively in preceding braced frame 22 and the right side of back braced frame, and first cylinder 21 that changes is used for playing the effect of direction to stretching into first belt 23 that changes the cylinder 21 downside before preceding braced frame 22 and the back braced frame from the right side left side, supports the vertical setting of pole setting 28, supports pole setting 28 and is located between preceding braced frame 22 and the back braced frame, and its lower extreme is fixed at middle drive arrangement's drive transmission frame upside.
The movable cross rod 24 is located between the front supporting frame 22 and the rear supporting frame, the right end of the movable cross rod 24 is hinged to the upper end of the supporting vertical rod 28, the left end of the movable cross rod 24 extends leftwards, the second direction-changing drum 25 is fixed to the upper side of the movable cross rod 24, the second direction-changing drum 25 is used for upwards supporting the belt 23 passing through the lower side of the first direction-changing drum 21 and bearing pressure from the belt 23, the pressure sensor 26 is located on the lower side of the left end of the movable cross rod 24, the pressure sensor 26 is fixed to the upper side of the driving transmission frame of the middle driving device, and the pressure sensor 26 is used for measuring and sending stress of the left end of the movable cross rod 24 and further detecting tension of the belt 23. When the belt 23 moves leftwards, the second direction-changing drum 25 is pressed downwards, and at this time, the left end of the movable cross rod 24 moves downwards to be pressed on the pressure sensor 26, so that the pressure sensor 26 measures and sends the received force.
The invention also includes: a third direction-changing drum 27, a third direction-changing drum 27 fixed on the left side of the front supporting frame 22 and the rear supporting frame, the third direction-changing drum 27 is used for guiding the belt 23 supported by the second direction-changing drum 25 and reducing the left shaking of the belt 23 at the start and stop time of the belt conveyor, so that the pressure sensor 26 can measure the real tension of the belt 23.
Two ends of a bearing of the first direction-changing drum 21 are fixedly connected with the right sides of the front supporting frame 22 and the rear supporting frame respectively, and two ends of a bearing of the third direction-changing drum 27 are fixedly connected with the left sides of the front supporting frame 22 and the rear supporting frame respectively; the axial line of the first direction-changing drum 21 and the axial line of the third direction-changing drum 27 are parallel to each other and are perpendicular to the direction of the belt 23; the fixed height of the third direction-changing drum 27 is lower than the fixed height of the first direction-changing drum 21 and higher than the fixed height of the second direction-changing drum 25.
The present invention is not limited to the above preferred embodiments, and any modifications, equivalent replacements, improvements, etc. within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. A support and protection system for a concrete-free base belt conveyor, comprising: the supporting and protecting monomers are arranged at two sides of the belt conveyor and are used for supporting and protecting the belt conveyor,
the support protection unit includes:
a hydraulic oil cylinder (1), the bottom of which is fixed on the upper side of the head unloading device of the belt conveyor, a piston rod of which is arranged in an upward inclined way and is deviated to the tail part of the belt conveyor,
a supporting plate (2) which is horizontally arranged, the lower side of the supporting plate is fixedly connected with the end part of a piston rod of the hydraulic oil cylinder (1),
a plurality of pointed bulges (3) are positioned at the upper side of the supporting plate (2), the lower ends of the pointed bulges are fixedly connected with the supporting plate (2), the upper ends of the pointed bulges are used for being inserted into a coal seam at the top of a roadway under the thrust action of a hydraulic oil cylinder (1) so as to fix the belt conveyor,
and the ground fixing beam (4) is positioned below the hydraulic oil cylinder (1), embedded in a roadway coal seam on the lower side of the belt conveyor, connected with a fixing frame bolt of the belt conveyor and used for fixing and protecting the belt conveyor.
2. The support protection system for the belt conveyor without the concrete foundation is characterized in that a plurality of support protection units are arranged on two sides of the belt conveyor uniformly.
3. The support protection system for the concrete-free foundation belt conveyor according to claim 2, wherein six support protection units are provided and are respectively provided on both sides of the driving device, both sides of the transmission device and both sides of the unloading device.
4. The support and protection system for a concrete-free base belt conveyor of claim 3, wherein when the support and protection unit is disposed at the driving device, the support and protection unit further comprises:
a left pull rod (5) which is obliquely arranged and is positioned at the left side of the belt conveyor, the upper end of the left pull rod is fixedly connected with the upper side of the belt conveyor, the lower end of the left pull rod is fixedly connected with a left driving fixing frame of the driving device,
and the right pull rod (6) is obliquely arranged and is positioned on the right side of the belt conveyor, the upper end of the right pull rod is fixedly connected with the upper side of the belt conveyor, the lower end of the right pull rod is fixedly connected with the right driving fixing frame of the driving device, and the right pull rod and the left pull rod (5) are matched with each other to keep the left driving fixing frame and the right driving fixing frame of the driving device in a horizontal state, so that the problem that the output axes of the driving device are not overlapped due to sinking of two sides of the roadway when the vault appears at the bottom of the roadway is avoided.
5. The support and protection system for a concrete-free base belt conveyor of claim 4, wherein the left and right drive mounts each comprise:
a motor fixing frame, a motor of the driving device is fixedly connected on the motor fixing frame,
the speed reducer fixing frame is fixedly connected with a speed reducer of the driving device and used for enabling the speed reducer of the driving device to coincide with the output axis of the driving device.
6. A support and protection system for a concrete-free base belt conveyor according to claim 5, wherein when the support and protection unit is disposed at the driving device,
the lower end of the left pull rod (5) is fixedly connected with the left side of the speed reducer fixing frame,
the lower end of the right pull rod (6) is fixedly connected with the right side of the speed reducer fixing frame,
the support protection unit further comprises:
a left pull rope (7) which is obliquely arranged and is positioned at the left side of the belt conveyor, the inclination angle of the left pull rope is larger than that of the left pull rod (5), the upper end of the left pull rope is fixed at the upper side of the belt conveyor, the lower end of the left pull rope is fixed at the left side of the motor fixing frame,
and the right side pull rope (8) is obliquely arranged and is positioned on the right side of the belt conveyor, the inclination angle of the right side pull rope is larger than that of the right side pull rod (6), the upper end of the right side pull rope is fixed on the upper side of the belt conveyor, the lower end of the right side pull rope is fixed on the right side of the motor fixing frame and is used for matching with the left side pull rope (7) to enable the speed reducer of the driving device and the output axis of the motor to coincide, and further, when the bottom of the roadway is prevented from being arched, the output axes caused by sinking of the two sides of the roadway do not coincide.
7. The support and protection system for a concrete-free base belt conveyor of claim 1, further comprising: the belt tension measuring device is positioned on the driving transmission frame on the lower side of the middle driving device of the belt conveyor and is used for detecting the tension of the belt (3);
the belt tension measuring device includes:
a front supporting frame (22) which is vertically arranged, the lower end of the front supporting frame is fixedly connected with the upper side of a driving transmission frame of the middle driving device,
a rear supporting frame which is vertically arranged, the lower end of the rear supporting frame is fixedly connected with the upper side of a driving transmission frame of the middle driving device and is symmetrically arranged with the front supporting frame (22),
a first direction-changing roller (21) with two ends respectively fixed on the right sides of the front support frame (22) and the rear support frame for guiding a belt (23) extending into the lower side of the first direction-changing roller (21) from right to left from the front support frame (22) and the rear support frame,
a supporting upright rod (28) which is vertically arranged, is positioned between the front supporting frame (22) and the rear supporting frame, and the lower end of the supporting upright rod is fixed on the upper side of a driving transmission frame of the middle driving device,
a movable cross bar (24) positioned between the front supporting frame (22) and the rear supporting frame, the right end of the movable cross bar is hinged with the upper end of the supporting upright rod (28), the left end of the movable cross bar extends leftwards,
a second direction-changing drum (25) fixed on the upper side of the movable cross bar (24) and used for lifting the belt (23) passing through the lower side of the first direction-changing drum (21) upwards and bearing the tension from the belt (23) along the same way,
and the pressure sensor (26) is positioned at the lower side of the left end of the movable cross rod (24), is fixed at the upper side of a driving transmission frame of the middle driving device, and is used for measuring and sending the tension of the left end of the movable cross rod (24) so as to detect the tension of the belt (23).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211400694.9A CN115676248A (en) | 2022-11-09 | 2022-11-09 | Support protection system for belt conveyor without concrete foundation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211400694.9A CN115676248A (en) | 2022-11-09 | 2022-11-09 | Support protection system for belt conveyor without concrete foundation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115676248A true CN115676248A (en) | 2023-02-03 |
Family
ID=85050457
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211400694.9A Pending CN115676248A (en) | 2022-11-09 | 2022-11-09 | Support protection system for belt conveyor without concrete foundation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115676248A (en) |
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2022
- 2022-11-09 CN CN202211400694.9A patent/CN115676248A/en active Pending
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