An integrated device for preventing overflow and venting concrete wet spraying machine hopper
By installing sealing components and exhaust pipes on the hopper of the wet concrete spraying machine, the problems of material overflow and poor exhaust in the hopper gap are solved, achieving effective sealing of materials and smooth discharge of gas, thus improving the efficiency of equipment use and ease of maintenance.
Patent Information
- Application Number
- CN202522642304.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-12
- Publication Date
- 2026-11-06
- Estimated Expiration
- 2035-12-12
AI Technical Summary
The gap between the hopper seat and the hopper of the existing wet concrete spraying machine can easily cause concrete material to overflow, resulting in waste and equipment pollution. At the same time, the rotor material chamber is not well vented, which affects the material feeding.
The design employs sealing components and exhaust pipes, including rubber plates, pressure plates, and fasteners, to seal the gap between the hopper seat and the hopper body. The exhaust main pipe and exhaust side pipe ensure smooth gas discharge, preventing concrete material from overflowing and ensuring proper exhaust from the rotor chamber.
It effectively prevents concrete material from overflowing, reduces waste and pollution, and ensures that the gas in the rotor's material chamber can be discharged smoothly, avoiding obstruction of material feeding.
Smart Images
Figure CN224943744U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of concrete spraying equipment, specifically to an integrated device for preventing overflow and venting material from the hopper of a wet concrete spraying machine. Background Technology
[0002] Rotary concrete spraying machines are specialized equipment used in industrial applications for concrete spraying operations. They consist of core components such as a drive unit, rotor assembly, and clamping mechanism, and are widely used in fields such as mine support, tunnel construction, and subway engineering. The hopper seat and hopper of a rotary concrete spraying machine use a fan-shaped hole clearance fit. The gap between the hopper seat and hopper serves to expel air from the rotor's material chamber. This gap is typically 3-5mm. Currently, with the widespread use of high-performance concrete, the slump of concrete used in construction has increased from the traditional 80-150mm to 120-180mm. During wet concrete spraying, concrete material easily overflows frequently from the gap between the hopper seat and hopper under vibration and air pressure, resulting in an overflow rate of 5-8%, causing concrete waste and equipment contamination. Reducing the clearance between the hopper seat and hopper to prevent overflow would lead to poor air venting in the rotor's material chamber, causing obstructed material feeding and pulsating spraying. Summary of the Invention
[0003] This invention addresses the problem of frequent overflow of concrete materials from the gap between the hopper seat and the hopper in existing technologies by providing an integrated anti-overflow and venting device for the hopper of a wet concrete spraying machine. This device not only prevents concrete materials from overflowing from the gap between the hopper seat and the hopper, thus avoiding waste of concrete materials and pollution of the wet concrete spraying machine, but also allows for the smooth discharge of gas from the rotor's material chamber.
[0004] To achieve the above objectives, the technical solution of this utility model is: an integrated anti-overflow and venting device for a concrete wet spraying machine hopper, comprising a hopper base and a hopper body disposed on top of the hopper base. The bottom of the hopper body has a waist-shaped discharge hole. A sealing component is provided at the mating gap between the hopper base and the lower part of the hopper body. The sealing component includes a rubber plate and a pressure plate sleeved on the lower part of the hopper body. The rubber plate is located between the top of the hopper base and the bottom of the pressure plate. Several fasteners are arranged on the pressure plate. By fitting the sealing component onto the lower part of the hopper body and fixing it to the top of the hopper base, the gap between the hopper base and the hopper body is sealed, thereby preventing concrete material from overflowing from the mating gap between the hopper base and the hopper.
[0005] The hopper body is internally equipped with an exhaust pipe, which includes a main exhaust pipe and an exhaust side pipe communicating with the upper part of the main exhaust pipe. The lower end of the main exhaust pipe passes through the discharge hole and extends to the outside of the hopper body. A sealing plug is detachably installed at the upper end of the main exhaust pipe, and one end of the exhaust side pipe extends to the outside of the hopper body. The gas in the rotor material chamber can be discharged sequentially through the main exhaust pipe and the exhaust side pipe, thereby avoiding the phenomenon of poor exhaust in the rotor material chamber, which would cause the material to be obstructed. The sealing plug can prevent concrete material from flowing into the exhaust pipe, and by removing the sealing plug, the concrete material that has entered the exhaust pipe can also be cleaned.
[0006] Furthermore, the outer edge of the rubber sheet is pressed and fixed to the top of the hopper seat by a pressure plate and fasteners, while the inner edge of the rubber sheet is elastically clamped to the lower outer side of the hopper body. The pressure plate is fixed to the top of the rubber sheet by fasteners, so that the pressure plate fixes the rubber sheet to the top of the hopper seat, thus pressing and fixing the rubber sheet.
[0007] Furthermore, both the rubber plate and the pressure plate are waist-shaped flat plate structures. The inner diameter of the rubber plate is smaller than the outer diameter of the hopper body. The rubber plate is interference-fitted with the hopper body, which ensures that the rubber plate can effectively seal the gap between the hopper seat and the hopper body.
[0008] Furthermore, the exhaust pipe is a straight pipe structure with openings at both the top and bottom. The lower end of the exhaust pipe passes through the middle of the discharge hole and extends to the outside of the hopper body. The upper part of the exhaust pipe has a through hole, so that the exhaust pipe can discharge the gas in the rotor cavity without affecting the discharge of material from the hopper body to the rotor cavity.
[0009] Furthermore, the hopper body has a circular hole corresponding to the through hole. One end of the exhaust side pipe is connected to the through hole and communicates with the exhaust main pipe. The other end of the exhaust side pipe passes through the circular hole and extends to the outside of the hopper body. The exhaust side pipe is welded and fixed to the hopper body, so that the exhaust side pipe can communicate with the exhaust main pipe and achieve the effect of venting the gas in the rotor material chamber through the exhaust side pipe.
[0010] The beneficial effects of this utility model through the above technical solution are as follows: This utility model has a reasonable structure, is easy to maintain, and has good performance. It can effectively prevent concrete materials from overflowing from the gap between the hopper seat and the hopper under vibration and air pressure, thereby avoiding concrete material waste and pollution of the concrete wet spraying machine. At the same time, it can also ensure the smooth discharge of gas in the rotor material chamber, avoiding phenomena such as poor exhaust of the rotor material chamber causing obstruction of material discharge.
[0011] This utility model employs a sealing component fitted onto the lower part of the hopper body and fixed to the top of the hopper seat to achieve a sealing effect on the gap between the hopper seat and the hopper body. A pressure plate is fixed to the top of the rubber plate using fasteners, thus securing the rubber plate to the top of the hopper seat. The rubber plate effectively seals the gap between the hopper seat and the hopper body, preventing concrete material from overflowing from this gap.
[0012] This invention enables the smooth discharge of gas from the rotor material chamber through the exhaust main pipe and the exhaust side pipe. The sealing plug at the upper end of the exhaust main pipe prevents concrete material from flowing into the exhaust pipe. At the same time, removing the sealing plug facilitates the cleaning of concrete material that has entered the exhaust pipe. Attached Figure Description
[0013] Figure 1 This is a schematic diagram of the structure of an integrated device for preventing overflow and venting material from the hopper of a wet concrete spraying machine, according to this utility model. Figure 1 ; Figure 2 This is a schematic diagram of the structure of an integrated device for preventing overflow and venting material from the hopper of a wet concrete spraying machine, according to this utility model. Figure 2 ; Figure 3 This is a schematic diagram of the structure of an integrated device for preventing overflow and venting material from the hopper of a wet concrete spraying machine, according to this utility model. Figure 3 .
[0014] The numbers in the attached diagram are as follows: 1 is the hopper base, 2 is the hopper body, 3 is the rubber plate, 4 is the pressure plate, 5 is the fastener, 6 is the exhaust pipe, 601 is the main exhaust pipe, 602 is the side exhaust pipe, and 7 is the sealing plug. Detailed Implementation
[0015] The present invention will be further described below with reference to the accompanying drawings and specific embodiments: Example 1: like Figures 1-3As shown, a concrete wet spraying machine hopper anti-overflow and venting integrated device includes a hopper seat 1 and a hopper body 2 disposed on the top of the hopper seat 1. The lower part of the hopper body 2 has a waist-shaped structure, and the bottom of the hopper body 2 has a waist-shaped discharge hole. A sealing component is provided at the fitting gap between the hopper seat 1 and the lower part of the hopper body 2. The sealing component includes a rubber plate 3 and a pressure plate 4 sleeved on the lower part of the hopper body 2. The rubber plate 3 is located between the top of the hopper seat 1 and the bottom of the pressure plate 4. Several fasteners 5 are arranged on the pressure plate 4. In this embodiment, the hopper seat 1 has an opening for the hopper body 2 to pass through, and the lower part of the hopper body 2 extends into the opening. The sealing assembly seals the gap between the hopper seat 1 and the hopper body 2, thereby preventing concrete material from overflowing from the gap between the hopper seat 1 and the hopper body 2 under vibration and air pressure. The pressure plate 4 is fixed by fasteners 5 so that the pressure plate 4 presses and fixes the rubber plate 3. The fasteners 5 are M10 bolts, and several fasteners 5 are distributed on the pressure plate 4 at a spacing of 50mm to fix the pressure plate 4. The pressure plate 4 is made of Q235 steel plate. The rubber plate 3 seals the gap between the hopper seat 1 and the hopper body 2. The rubber plate 3 is made of nitrile rubber, with a thickness of 5mm and a Shore A hardness of 60.
[0016] The hopper body 2 is internally equipped with an exhaust pipe 6, which includes an exhaust main pipe 601 and an exhaust side pipe 602 communicating with the upper part of the exhaust main pipe 601. The lower end of the exhaust main pipe 601 passes through the discharge hole and extends to the outside of the hopper body 2, while the lower end of the exhaust main pipe 601 extends to the top of the rotor material chamber. A sealing plug 7 is detachably installed at the upper end of the exhaust main pipe 601, and one end of the exhaust side pipe 602 extends to the outside of the hopper body 2. In this embodiment, the gas in the rotor material chamber can be discharged sequentially through the exhaust main pipe 601 and the exhaust side pipe 602, thereby avoiding poor exhaust of the rotor material chamber and the resulting obstruction of material discharge. The exhaust pipe 6 is a three-way pipe structure made of seamless steel pipe. The lower part of the exhaust main pipe 601 is 160mm long and its end is 5mm away from the upper surface of the rotor disc of the rotary concrete wet spraying machine. The upper part of the exhaust main pipe 601 is 30mm long, and the exhaust side pipe 602 is 200mm long.
[0017] In this embodiment, the sealing plug 7 has the function of preventing backflow, which can prevent concrete material from flowing into the exhaust pipe 6. The lower air inlet of the exhaust pipe 601 is directly connected to the rotor material chamber. If the sealing plug 7 is not used to block it, the concrete material that continuously falls during operation will flow into the upper port of the exhaust pipe 601 and cause blockage. The upper port of the exhaust pipe 601 is blocked with the sealing plug 7 to form a physical isolation barrier and prevent the backflow of concrete material. The sealing plug 7 can be detachably connected to the exhaust pipe 601 by means of threads, or a pipe plug made of silicone rubber can be directly inserted into the upper port of the exhaust pipe 601.
[0018] In addition, after concrete dust enters the exhaust pipe 6 with the airflow, it easily adheres and accumulates in the exhaust pipe 6. Through the removable sealing plug 7, when blockage occurs, the operator can directly unscrew the sealing plug 7 without disassembling the hopper and clean it from above with a cleaning rod, reducing maintenance time from the traditional 30 minutes to 2 minutes. Specifically, by opening the upper port of the exhaust main pipe 601 through the sealing plug 7, the three-way tubular structure of the exhaust pipe 6 allows for instantaneous pressure balance inside and outside the exhaust pipe 6, preventing negative pressure inside the exhaust pipe 6 from sucking in concrete slurry during cleaning, thus achieving safe maintenance.
[0019] The outer edge of the rubber plate 3 is pressed and fixed to the top of the hopper seat 1 by the pressure plate 4 and the fastener 5, and the inner edge of the rubber plate 3 is elastically clamped to the lower outer side of the hopper body 2. In this embodiment, the fastener 5 fixes the pressure plate 4 to the top of the rubber plate 3, so that the pressure plate 4 fixes the rubber plate 3 to the top of the hopper seat 1, and the rubber plate 3 seals the fitting gap between the hopper seat 1 and the hopper body 2.
[0020] Both the rubber plate 3 and the pressure plate 4 are oblong flat structures. The inner diameter of the rubber plate 3 is smaller than the outer diameter of the hopper body 2, and the rubber plate 3 is interference-fitted with the hopper body 2. In this embodiment, the inner diameter of the rubber plate 3 is 0.5-1 mm smaller than the outer diameter of the hopper body 2 to form an interference seal. Specifically, the inner edge of the rubber plate 3 forms a 0.5 mm interference fit with the outer wall of the hopper body 2. The purpose is to ensure that the rubber plate 3 can effectively seal the gap between the hopper seat 1 and the hopper body 2, improve the sealing effect, and reduce the concrete material overflow rate to <0.1%.
[0021] The exhaust pipe 601 is a straight pipe structure with openings at both the top and bottom. The lower end of the exhaust pipe 601 passes through the middle of the discharge hole and extends to the outside of the hopper body 2. The upper part of the exhaust pipe 601 has a through hole. In this embodiment, the lower end of the exhaust pipe 601 passes through the middle of the discharge hole, which allows the exhaust pipe 601 to cooperate with the exhaust measuring pipe 602 to discharge the gas in the rotor material chamber, while not affecting the hopper body 2 to discharge material into the rotor material chamber through the discharge hole.
[0022] The hopper body 2 has a circular hole corresponding to the through hole. One end of the exhaust side pipe 602 is connected to the through hole and communicates with the exhaust main pipe 601. The other end of the exhaust side pipe 602 passes through the circular hole and extends to the outside of the hopper body 2. The exhaust side pipe 602 is welded and fixed to the hopper body 2. In this embodiment, the through hole and the circular hole enable the exhaust side pipe 602 to communicate with the exhaust main pipe 601 and discharge the gas in the rotor material chamber.
[0023] When this utility model is in use, the rotor-type wet concrete spraying machine is working. Concrete material is conveyed into the rotor material chamber through the hopper body 1. The concrete material flows into the rotor material chamber through the discharge hole at the lower end of the hopper body 1. That is, the concrete material flows downward from both sides of the exhaust pipe 601. The sealing plug 7 prevents the concrete material from flowing into the exhaust pipe 6. The rubber plate 3 can effectively prevent the concrete material from overflowing from the fit gap between the hopper seat 1 and the hopper body 2 under the action of vibration and air pressure. The gas in the rotor material chamber moves upward and is discharged through the exhaust pipe 601 and the exhaust side pipe 602. When the exhaust pipe 6 is blocked, the sealing plug 7 is directly unscrewed, and a cleaning rod is inserted into the exhaust pipe 6 to clean the concrete material inside.
[0024] Example 2: The similarities between Example 2 and Example 1 will not be repeated in detail. The difference is that in Example 2, the inner edge of the rubber plate 3 is molded into a lip-shaped sealing edge with a thickness of 2mm and an inclination angle of 30°, and the sealing pressure is increased to 0.03MPa; the pressure plate 4 is made of 304 stainless steel and is fixed to the top of the rubber plate 3 by quick-release screws with handles, which can be disassembled and installed by hand without tools, reducing the replacement time of the rubber plate 3 from 15 minutes to 3 minutes; a one-way breather valve is installed on the exhaust side pipe 602 to prevent external dust from being sucked back into the exhaust pipe 6 when the machine is stopped; the lower inner wall of the exhaust main pipe 601 is coated with a polytetrafluoroethylene coating with a thickness of 50μm to make the lower inner wall of the exhaust main pipe 601 resistant to concrete adhesion, thereby extending the cleaning cycle of the exhaust main pipe 601.
[0025] The embodiments described above are merely preferred embodiments of the utility model and are not intended to limit the scope of the utility model. Therefore, all equivalent changes or modifications made to the technical solutions described in the scope of the utility model patent application should be included within the scope of the utility model patent application.
Claims
1. A concrete wet spraying machine hopper overflow prevention and venting integrated device, comprising a hopper seat (1) and a hopper body (2) disposed on the top of the hopper seat (1), characterized in that, The bottom of the hopper body (2) is provided with a waist-shaped discharge hole. A sealing component is provided at the fitting gap between the hopper seat (1) and the lower part of the hopper body (2). The sealing component includes a rubber plate (3) and a pressure plate (4) sleeved on the lower part of the hopper body (2). The rubber plate (3) is located between the top of the hopper seat (1) and the bottom of the pressure plate (4). Several fasteners (5) are arranged on the pressure plate (4). The hopper body (2) is provided with an exhaust pipe (6) inside. The exhaust pipe (6) includes an exhaust main pipe (601) and an exhaust side pipe (602) connected to the upper part of the exhaust main pipe (601). The lower end of the exhaust main pipe (601) passes through the feeding hole and extends to the outside of the hopper body (2). The upper end of the exhaust main pipe (601) is detachably provided with a sealing plug (7). One end of the exhaust side pipe (602) extends to the outside of the hopper body (2).
2. The integrated material overflow exhaust device for a concrete wet shotcrete machine hopper according to claim 1, wherein, The outer edge of the rubber plate (3) is pressed and fixed to the top of the hopper seat (1) by the pressure plate (4) and fasteners (5), and the inner edge of the rubber plate (3) is elastically clamped to the lower outer side of the hopper body (2).
3. The wet concrete spraying machine hopper anti-overflowing air exhaust integrated device according to claim 2, characterized in that, Both the rubber plate (3) and the pressure plate (4) are waist-shaped flat plate structures. The inner diameter of the rubber plate (3) is smaller than the outer diameter of the hopper body (2). The rubber plate (3) and the hopper body (2) are interference fit.
4. The integrated material overflow exhaust device for a concrete wet shotcrete machine hopper according to claim 1, wherein, The exhaust pipe (601) is a straight pipe structure with openings at both the top and bottom. The lower end of the exhaust pipe (601) passes through the middle of the discharge hole and extends to the outside of the hopper body (2). The upper part of the exhaust pipe (601) has a through hole.
5. The wet concrete spraying machine hopper anti-overflowing air exhaust integrated device according to claim 4, characterized in that, The hopper body (2) has a circular hole corresponding to the through hole. One end of the exhaust side pipe (602) is connected to the through hole and communicates with the exhaust main pipe (601). The other end of the exhaust side pipe (602) passes through the circular hole and extends to the outside of the hopper body (2). The exhaust side pipe (602) is welded and fixed to the hopper body (2).