CN220041280U - Concrete conveying pump simulation equipment for teaching demonstration - Google Patents
Concrete conveying pump simulation equipment for teaching demonstration Download PDFInfo
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- CN220041280U CN220041280U CN202321307230.3U CN202321307230U CN220041280U CN 220041280 U CN220041280 U CN 220041280U CN 202321307230 U CN202321307230 U CN 202321307230U CN 220041280 U CN220041280 U CN 220041280U
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- 238000004088 simulation Methods 0.000 title claims abstract description 36
- 238000003756 stirring Methods 0.000 claims abstract description 74
- 238000005086 pumping Methods 0.000 claims abstract description 32
- 238000007599 discharging Methods 0.000 claims description 29
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 21
- 230000001681 protective effect Effects 0.000 claims description 4
- 238000010276 construction Methods 0.000 abstract description 4
- 230000005540 biological transmission Effects 0.000 description 4
- 239000012535 impurity Substances 0.000 description 4
- 230000033001 locomotion Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000001914 filtration Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
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Abstract
The utility model relates to a concrete conveying pump simulation device for teaching demonstration, and belongs to the technical field of construction machinery teaching. The simulation equipment comprises a frame, a housing, a pumping system, a motor model, a stirring system and a traveling system; taking the travelling direction of the travelling system as the longitudinal direction, arranging a stirring system at the front end of the longitudinal direction of the frame, and sequentially arranging a pumping system and a motor model behind the stirring system; the housing is arranged above the frame and is used for housing the pumping system and the motor model which are arranged on the frame; a traveling system is arranged below the frame; the housing has an opening and closing function; the pumping system comprises a swing valve oil cylinder model and a steering engine; the steering engine and the swing valve oil cylinder model are arranged on the rear wall of the stirring system; the steering engine is used for driving two swing valves in the swing valve oil cylinder model to swing and driving an S valve arranged in the stirring system to swing. The simulation equipment is convenient for students to observe and operate, and meanwhile, potential safety hazards are greatly reduced, and the simulation equipment is small in size and easy to carry.
Description
Technical Field
The utility model relates to a concrete conveying pump simulation device for teaching demonstration, and belongs to the technical field of construction machinery teaching.
Background
A concrete pump, also called a concrete pump, is a mechanical device that uses pressure to continuously pump concrete along a pipe. The concrete delivery pump is widely applied to road, bridge, building and tunnel construction. The concrete pump can be classified into a gate valve concrete pump and an S-valve concrete pump according to the type of pump valve. The system can be further divided into a towed concrete pump, a vehicle-mounted pump and a pump truck according to the working mode. The towed concrete pump has the advantages of relatively smaller volume, relatively convenient movement and relatively simple operation compared with other types of pumps. Therefore, in the current construction machinery teaching process, a towed concrete pump is often used as a key teaching aid for showing the principle and operation of a concrete delivery pump.
Because the old and even retired concrete delivery pumps are mostly adopted by each school at present to carry out physical teaching on students, the students have the following problems: 1) The equipment is old and cannot effectively display the important functions of the concrete conveying pump in all directions, so that the observation of students is inconvenient; 2) For students, the existing concrete conveying pump used as a teaching mould is inconvenient to operate, and the operation safety flow of the concrete conveying pump is difficult to master, so that potential safety hazards exist to a certain extent; 3) The concrete delivery pump has a complex structure and is not easy to maintain, and the equipment maintenance period is shortened, so that the normal teaching efficiency is influenced; 4) The real concrete conveying pump is used as teaching equipment for teaching and displaying, and compared with a teaching environment, the concrete conveying pump occupies a large teaching space, and certain difficulty exists in carrying the real concrete conveying pump for school teaching, so that part of schools can only adopt outdoor teaching, and better teaching quality cannot be guaranteed.
Disclosure of Invention
In view of the above, the utility model aims to solve the technical problems that the existing concrete conveying pump for teaching is inconvenient for students to observe and operate, has certain potential safety hazards, occupies large space, is difficult to carry and is difficult to maintain.
In order to achieve the purpose of the utility model, the following technical scheme is provided.
A concrete delivery pump simulation device for teaching demonstration comprises a frame, a housing, a pumping system, a motor model, a stirring system and a traveling system;
taking the travelling direction of the travelling system as the longitudinal direction, arranging a stirring system at the front end of the longitudinal direction of the frame, and sequentially arranging a pumping system and a motor model behind the stirring system; the housing is arranged above the frame and is used for housing the pumping system and the motor model which are arranged on the frame; a traveling system is arranged below the frame;
the housing has an opening and closing function, so that a pumping system and a motor model covered by the housing can be clearly displayed, and students can observe and learn conveniently;
the pumping system is a core system of the concrete conveying pump simulation equipment and is used for pumping out concrete well stirred by the stirring system, and comprises a swing valve oil cylinder model and a steering engine; the steering engine and the swing valve oil cylinder model are arranged on the rear wall of the stirring system; the steering engine is used for driving two swing valves in the swing valve oil cylinder model to swing and driving an S valve arranged in the stirring system to swing.
Further, the power output part of the steering engine is connected with the vertical part of the T-shaped connecting piece, two ends of the horizontal part of the T-shaped connecting piece are respectively connected with two swing valves in the swing valve oil cylinder model, and the power output part of the steering engine is connected with an S valve in the stirring system through a connecting shaft.
Further, the pumping system also comprises a main oil cylinder model, a water tank model and a transparent concrete cylinder model;
the transparent concrete cylinder model is arranged at the rear of the stirring system, and the rear of the transparent concrete cylinder model is sequentially connected with the water tank model and the main oil cylinder model;
the transparent concrete cylinder model comprises two transparent concrete cylinders which are arranged in parallel, and two through holes which penetrate through the front end face and the rear end face of the water tank model are longitudinally formed in the water tank model; one end of each transparent concrete cylinder is respectively communicated with two through holes of the rear wall of the stirring system, and the other end of each transparent concrete cylinder is respectively coaxially communicated with two through holes of the front end face of the water tank model along the longitudinal direction; the two main oil cylinders are respectively and coaxially communicated with two through holes on the longitudinal rear end face of the water tank model;
an electric push rod is arranged in each main oil cylinder, and a piston is arranged in each transparent concrete cylinder; the two electric push rods are alternately reciprocated, so that the connected pistons are driven to alternately reciprocate in the transparent concrete cylinder model.
Further, the stirring system also comprises a discharging hopper; two through holes are formed in the rear wall of the discharging hopper and are used for being connected with two transparent concrete cylinders; a stirring shaft is arranged in the discharging hopper, the axial direction of the stirring shaft is transverse, stirring arms are arranged on the stirring shaft, and the number of the stirring arms is set according to the requirement; the outside of the discharging hopper is provided with a rotating motor which is coaxially connected with the stirring shaft, the rotating motor drives the stirring shaft to rotate, and the stirring arm is driven to rotate by the rotation of the stirring shaft.
Further, the front end of the discharging hopper is provided with a discharging hole connected with the S valve, namely one end of the S valve is connected with the discharging hole, and the other end of the S valve is respectively connected with two through holes of the rear wall of the discharging hopper through the swing of the S valve.
Further, in the stirring system, an upper hopper communicated with the lower hopper is arranged above the lower hopper, and a protective net is arranged at a feed inlet of the upper hopper.
Further, the walking system comprises walking wheels, telescopic supporting wheels and telescopic supporting legs; the walking wheels are symmetrically arranged on two lateral sides of the longitudinal front end of the frame, telescopic supporting wheels are arranged below the longitudinal rear end of the frame, and telescopic supporting legs are distributed at the bottom of the frame in a rectangular mode.
Further, a hanging lug is arranged at the rear end of the longitudinal direction of the frame and used for dragging the concrete conveying pump simulation equipment.
Further, the two lateral sides of the housing are door plates capable of being turned upwards.
Advantageous effects
(1) The utility model provides a concrete conveying pump simulation device for teaching demonstration, which is a towed concrete conveying pump simulation device, and correspondingly reduces according to concrete conveying pumps applied in reality, keeps key structural components, and comprises a frame, a housing, a pumping system, a motor model, a stirring system and a traveling system, so that the working principle of the concrete conveying pump can be shown more completely and truly; because the concrete conveying pump simulation equipment only keeps key parts, the occupied space is small, the conveying is flexible, the teaching is convenient, and the maintenance is also convenient.
The housing in the concrete conveying pump simulation equipment has an opening and closing function, and after the housing is opened, a pumping system and a motor model covered by the housing can be clearly displayed, so that students can observe and learn conveniently.
The steering engine in the pumping system is arranged, so that the swing valve oil cylinder model and the S valve can swing simultaneously, and a movement mode identical to that of a real concrete conveying pump is formed, therefore, the steering engine is convenient for students to operate, the swing valve oil cylinder in the real concrete conveying pump can be simulated to push the S valve to swing, the risk of hydraulic transmission in the real concrete conveying pump is avoided, the operation safety is ensured, and a certain potential safety hazard is reduced.
(2) The utility model provides a concrete delivery pump simulation device for teaching demonstration, wherein an electric push rod in a main oil cylinder model in a pumping system pushes a piston in a transparent concrete cylinder to move, the driving mode only needs to electrify the electric push rod, the pushing of the piston by the main oil cylinder in a real concrete delivery pump is avoided, and a certain safety risk exists in the actual process because of hydraulic transmission, so that the safety is further improved and the potential safety hazard is reduced by the arrangement of the electric push rod. Therefore, the electric push rod and the steering engine are matched together to replace a main oil cylinder and a swing valve oil cylinder in a hydraulic system in a real concrete delivery pump, the hydraulic transmission system in the real concrete delivery pump is changed into the electric transmission, and the safety problem existing in the current physical teaching is further solved on the basis of guaranteeing the real working state of the simulated concrete delivery pump.
The transparent concrete cylinder model is convenient for teachers to teach and explain and students to observe, so that students can clearly and intuitively observe the matched action of the piston in the transparent concrete cylinder model, and the understanding and grasp of the concrete pumping process principle are deepened.
(3) The utility model provides a concrete conveying pump simulation device for teaching demonstration, wherein a rotating motor drives a stirring shaft to rotate, and the rotation of the stirring shaft drives a stirring arm to rotate, so that concrete in a stirring system is uniformly stirred.
(4) The utility model provides a concrete conveying pump simulation device for teaching demonstration, wherein an S valve is arranged to enable a transparent concrete cylinder, the S valve and a discharge hole to be connected in sequence, so that a concrete pumping-out passage is formed, and concrete is conveniently output.
(5) The utility model provides a concrete conveying pump simulation device for teaching demonstration, wherein a protective net is arranged for filtering and removing impurities with larger volume in concrete so as to prevent the impurities with larger volume from blocking a conveying pipeline and affecting the normal pumping of the concrete.
Drawings
Fig. 1 is a schematic diagram of the overall structure of the concrete pump simulation apparatus.
Fig. 2 is a schematic diagram of the pumping system.
Fig. 3 is a schematic structural view of the stirring system.
Wherein: 1-discharge hole, 2-feeding hopper, 3-protection net, 4-housing, 5-door plate, 6-frame, 7-supporting wheel, 8-motor model, 9-walking wheel, 10-supporting leg, 11-rotating motor, 12-discharging hopper, 13-electric push rod, 14-master cylinder model, 15-water tank model, 16-transparent concrete cylinder model, 17-swing valve cylinder model, 18-steering engine, 19-piston, 20-stirring arm, 21-S valve and 22-stirring shaft.
Detailed Description
The utility model is further described below with reference to the drawings and the detailed description.
Example 1
As shown in fig. 1-3, a concrete delivery pump simulation device for teaching demonstration comprises a frame 6, a housing 4, a pumping system, a motor model 8, a stirring system and a traveling system;
taking the travelling direction of the travelling system as the longitudinal direction, arranging a stirring system at the front end of the longitudinal direction of the frame 6, and sequentially arranging a pumping system and a motor model 8 behind the stirring system; the housing 4 is arranged above the frame 6 and is used for housing a pumping system and a motor model 8 arranged on the frame 6; a traveling system is arranged below the frame 6;
the two lateral sides of the housing 4 are door panels 5 capable of turning upwards (for example, the upper ends of the door panels 5 are hinged with the housing 4, so that the door panels 5 can rotate around the hinged positions to realize turning), and each side is provided with two door panels 5 in parallel along the longitudinal direction of the frame 6; through the upward overturn of the door plate 5, the pumping system and the motor model 8 covered by the housing 4 can be clearly displayed, and the student can observe and learn conveniently.
The pumping system is a core system of the concrete conveying pump simulation equipment and is used for pumping out concrete stirred by the stirring system; the pumping system comprises a main oil cylinder model 14, a water tank model 15, a transparent concrete cylinder model 16, a swing valve oil cylinder model 17 and a steering engine 18;
the transparent concrete cylinder model 16 is arranged at the rear of the stirring system and is connected with a through hole in the rear wall of the stirring system; the rear of the transparent concrete cylinder model 16 is sequentially connected with a water tank model 15 and a main oil cylinder model 14, and one end, far away from the water tank model 15, of the main oil cylinder model 14 is provided with a motor model 8; the motor model 8 is arranged to show the students the actual installation position of the motor in the concrete pump, in this example, the motor model 8 has no driving function (i.e. the motor model 8 is not connected with the electric push rod 13 in the master cylinder model 14, and the electric push rod 13 can reciprocate after being electrified).
The master cylinder model 14 comprises two master cylinders which are arranged in parallel, the transparent concrete cylinder model 16 comprises two transparent concrete cylinders which are arranged in parallel, and the water tank model 15 is provided with two through holes which penetrate through the front end face and the rear end face of the water tank model along the longitudinal direction; one end of each of the two transparent concrete cylinders is communicated with two through holes of the rear wall of the stirring system, and the other end of each of the two transparent concrete cylinders is communicated with two through holes of the front end face of the water tank model 15 along the longitudinal direction; one end of each of the two main cylinders is respectively communicated with two through holes on the longitudinal rear end face of the water tank model 15, namely, the two main cylinders in the main cylinder model 14 are respectively coaxially connected with two transparent concrete cylinders in the transparent concrete cylinder model 16 through the two through holes in the water tank model 15;
an electric push rod 13 is arranged in each main oil cylinder; a piston 19 is arranged in each transparent concrete cylinder; the electric push rod 13 is connected with a piston 19 coaxially arranged with the electric push rod; so, after the two electric push rods 13 are electrified, alternating reciprocating motion is carried out, and then the piston 19 connected with the electric push rods is driven to carry out alternating reciprocating motion in the transparent concrete cylinder model 16; in this example, the transparent concrete cylinder is made of organic glass.
The swing valve oil cylinder model 17 and the steering engine 18 are arranged on the rear wall of the stirring system; the power output part of the steering engine 18 drives two swing valves in the swing valve oil cylinder model 17 to swing, and simultaneously drives an S valve 21 arranged in the stirring system to swing. In the embodiment, the power output part of the steering engine 18 is connected with the vertical part of a T-shaped connecting piece, two ends of the horizontal part of the T-shaped connecting piece are respectively connected with two swing valves in the swing valve oil cylinder model 17, and the power output part of the steering engine 18 is connected with an S valve 21 in the stirring system through a connecting shaft; when the steering engine 18 drives the T-shaped connecting piece to swing, the T-shaped connecting piece drives the two swing valves in the swing valve oil cylinder model 17 to swing, so that the steering engine 18 indirectly drives the two swing valves, and meanwhile, the steering engine 18 drives the S-valve 21 to swing.
The stirring system also comprises an upper hopper 2 and a lower hopper 12 which are communicated with each other from top to bottom; the feed inlet department of material loading hopper 2 sets up the protection network 3, and the protection network 3 is arranged in filtering out the impurity of great volume in the concrete (like the stone) to avoid great impurity to block pipeline, influence the normal pump out of concrete. In this example, the through holes in the rear wall of the stirring system are formed in the rear wall of the discharging hopper 12, that is, the two transparent concrete cylinders in the transparent concrete cylinder model 16 are respectively connected with the two through holes in the rear wall of the discharging hopper 12.
A stirring shaft 22 is arranged in the discharging hopper 12, the axial direction of the stirring shaft 22 is transverse, stirring arms 20 are arranged on the stirring shaft 22 along the longitudinal direction, and the number of the stirring arms 20 is set according to the requirement; a rotary motor 11 coaxially connected to the stirring shaft 22 is provided outside the discharging hopper 12, the rotary motor 11 drives the stirring shaft 22 to rotate, and the stirring arm 20 is driven to rotate by the rotation of the stirring shaft 22.
The front end of the discharging hopper 12 is provided with a discharging port 1 connected with the S valve 21; that is, one end of the S valve 21 is connected with the discharge port 1, and the other end is respectively connected with two through holes of the rear wall of the discharging hopper 12 through periodical swing, so that the transparent concrete cylinder, the S valve 21 and the discharge port 1 are sequentially connected to form a concrete pumping passage.
The walking system comprises a walking wheel 9, a telescopic supporting wheel 7 and a telescopic supporting leg 10; the two travelling wheels 9 are symmetrically arranged on two lateral sides of the longitudinal front end of the frame 6, a telescopic supporting wheel 7 is arranged below the longitudinal rear end of the frame 6, and four telescopic supporting legs 10 are distributed at the bottom of the frame 6 in a rectangular shape.
When the concrete pump simulation equipment needs to be stationary, the telescopic support leg 10 extends downwards until the telescopic support leg contacts with a supporting surface so as to support the whole equipment; when the concrete pump simulation apparatus needs to move back and forth a short distance, the retractable legs 10 are retracted upward while the retractable support wheels 7 are extended, so that the concrete pump simulation apparatus can be translated back and forth. When the concrete pump simulation equipment needs to be dragged by a long distance, the telescopic supporting legs 10 and the telescopic supporting wheels 7 are retracted upwards, and the concrete pump simulation equipment is dragged through the hanging lugs arranged at the rear end of the frame 6 in the longitudinal direction.
The working process of the concrete conveying pump simulation equipment comprises the following steps:
A. adding concrete through a feed inlet of the feeding hopper 2, filtering the concrete through the protective net 3, flowing the concrete into the discharging hopper 12, and then starting the rotating motor 11, and stirring the added concrete by a stirring shaft 22 and a stirring arm 20 in the discharging hopper 12;
B. after stirring uniformly, electrifying the electric push rods 13 and the steering engines 18 in the pumping system, and alternately reciprocating the two electric push rods 13 to further drive the two pistons 19 respectively connected with the corresponding electric push rods 13 to alternately reciprocate, wherein when the pistons 19 move to the rear of the frame, concrete in the discharging hopper 12 is sucked into the corresponding transparent concrete cylinder; when the piston 19 moves to the front of the frame, the piston 19 pushes the concrete in the transparent concrete cylinder to flow in the direction of the S valve 21 in the stirring system, and as the steering engine 18 drives the S valve 21 to swing, one end of the S valve 21 is connected with a through hole in the rear wall of the discharging hopper 12, so that the concrete in the transparent concrete cylinder is pumped out through the S valve 21 and the discharging hole 1.
The utility model includes, but is not limited to, the above embodiments, any equivalent or partial modification made under the principle of the spirit of the utility model, shall be considered as being within the scope of the utility model.
Claims (9)
1. A concrete delivery pump analog device for teaching demonstration, its characterized in that: comprises a frame, a housing, a pumping system, a motor model, a stirring system and a traveling system;
taking the travelling direction of the travelling system as the longitudinal direction, arranging a stirring system at the front end of the longitudinal direction of the frame, and sequentially arranging a pumping system and a motor model behind the stirring system; the housing is arranged above the frame and is used for housing the pumping system and the motor model which are arranged on the frame; a traveling system is arranged below the frame; the housing has an opening and closing function;
the pumping system comprises a swing valve oil cylinder model and a steering engine; the steering engine and the swing valve oil cylinder model are arranged on the rear wall of the stirring system; the steering engine is used for driving two swing valves in the swing valve oil cylinder model to swing and driving an S valve arranged in the stirring system to swing.
2. A concrete transfer pump simulation apparatus for teaching demonstration according to claim 1, wherein: the power output part of the steering engine is connected with the vertical part of the T-shaped connecting piece, two ends of the horizontal part of the T-shaped connecting piece are respectively connected with two swing valves in the swing valve oil cylinder model, and the power output part of the steering engine is connected with an S valve in the stirring system through a connecting shaft.
3. A concrete transfer pump simulation apparatus for teaching demonstration according to claim 1 or 2, wherein: the pumping system also comprises a main oil cylinder model, a water tank model and a transparent concrete cylinder model;
the transparent concrete cylinder model is arranged at the rear of the stirring system, and the rear of the transparent concrete cylinder model is sequentially connected with the water tank model and the main oil cylinder model;
the transparent concrete cylinder model comprises two transparent concrete cylinders which are arranged in parallel, and two through holes which penetrate through the front end face and the rear end face of the water tank model are longitudinally formed in the water tank model; one end of each transparent concrete cylinder is respectively communicated with two through holes of the rear wall of the stirring system, and the other end of each transparent concrete cylinder is respectively coaxially communicated with two through holes of the front end face of the water tank model along the longitudinal direction; the two main oil cylinders are respectively and coaxially communicated with two through holes on the longitudinal rear end face of the water tank model;
an electric push rod is arranged in each main oil cylinder, and a piston is arranged in each transparent concrete cylinder; the two electric push rods are alternately reciprocated, so that the connected pistons are driven to alternately reciprocate in the transparent concrete cylinder model.
4. A concrete transfer pump simulation apparatus for teaching demonstration according to claim 3, wherein: the stirring system also comprises a discharging hopper; two through holes are formed in the rear wall of the discharging hopper and are used for being connected with two transparent concrete cylinders; a stirring shaft is arranged in the discharging hopper, the axial direction of the stirring shaft is transverse, and a stirring arm is arranged on the stirring shaft; a rotating motor coaxially connected with the stirring shaft is arranged at the outer side of the discharging hopper.
5. A concrete delivery pump simulation apparatus for a teaching demonstration according to claim 4, wherein: the front end of the discharging hopper is provided with a discharging hole connected with the S valve, namely one end of the S valve is connected with the discharging hole, and the other end of the S valve is respectively connected with two through holes of the rear wall of the discharging hopper through the swing of the S valve.
6. A concrete delivery pump simulation apparatus for a teaching demonstration according to claim 4, wherein: in the stirring system, an upper hopper communicated with a lower hopper is arranged above the lower hopper, and a protective net is arranged at a feed inlet of the upper hopper.
7. A concrete transfer pump simulation apparatus for teaching demonstration according to claim 1 or 2, wherein: the walking system comprises walking wheels, telescopic supporting wheels and telescopic supporting legs; the walking wheels are symmetrically arranged on two lateral sides of the longitudinal front end of the frame, telescopic supporting wheels are arranged below the longitudinal rear end of the frame, and telescopic supporting legs are distributed at the bottom of the frame in a rectangular mode.
8. A concrete transfer pump simulation apparatus for a teaching demonstration according to claim 7, wherein: and the rear end of the longitudinal direction of the frame is provided with a hanging lug for dragging the concrete conveying pump simulation equipment.
9. A concrete transfer pump simulation apparatus for teaching demonstration according to claim 1 or 2, wherein: the two lateral sides of the housing are door plates capable of being turned upwards.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321307230.3U CN220041280U (en) | 2023-05-26 | 2023-05-26 | Concrete conveying pump simulation equipment for teaching demonstration |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321307230.3U CN220041280U (en) | 2023-05-26 | 2023-05-26 | Concrete conveying pump simulation equipment for teaching demonstration |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220041280U true CN220041280U (en) | 2023-11-17 |
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ID=88734103
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321307230.3U Active CN220041280U (en) | 2023-05-26 | 2023-05-26 | Concrete conveying pump simulation equipment for teaching demonstration |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220041280U (en) |
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2023
- 2023-05-26 CN CN202321307230.3U patent/CN220041280U/en active Active
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