Automated Concrete Specimen Preparation Equipment

Abstract

The application provides a kind of concrete test block automatic preparation equipment, front and rear driving devices are respectively driven to rotate synchronously around horizontal cylinder axis by front and rear rotating discs, so as to drive the mold cavity unit to rotate around horizontal cylinder axis, when rotating to spraying position, the mold box of mold cavity unit is sprayed with release agent by spraying unit, when rotating to pouring position, concrete flows into mold box through feeding channel, when rotating to vibrating position, the concrete in mold box is vibrated by vibrating unit, then it is stationary, when rotating to discharging position, the mold cavity unit is engaged with the first gear by the second gear, the first gear is driven to rotate clockwise around the first gear axis by discharging driving device, so that the mold cavity unit rotates counterclockwise around the second gear axis, the mold box opening is aligned with the discharge channel, so that the concrete test block is poured out from the discharge channel. The application can realize the automatic preparation of concrete test block, improve the preparation efficiency and reduce the performance error of the same batch of concrete test block.

Description

Technical Field

[0001] This invention relates to the field of building construction technology, and particularly to the field of concrete test block preparation technology, specifically referring to an automated concrete test block preparation device. Background Technology

[0002] Construction refers to the production activities during the implementation phase of an engineering project. It is the process of building various types of structures, or the process of turning the lines on design drawings into a physical object at a designated location. It includes foundation construction, main structure construction, roofing construction, and decoration construction. The site where construction work takes place is called the "construction site" or "building site."

[0003] Concrete test blocks are frequently used in the construction process. A concrete test block is a small block of 15 cubic centimeters made by taking a portion of the concrete when it is mixed on site. It is used to test whether the performance of the batch of concrete meets the standards after the concrete is poured.

[0004] During on-site production, for concrete with the same mix proportion, sampling should be conducted at least once for every 100 cubic meters. If the continuous supply of concrete with the same mix proportion exceeds 1000 cubic meters in a sub-project, sampling should be conducted at least once for every 200 cubic meters of concrete. Sampling blocks should be made on-site, with a portion left to cure under the same conditions, and the other portion placed in a standard curing chamber for curing. After a certain period of time, the performance of the concrete blocks should be tested.

[0005] In existing technologies, the manufacture of concrete test blocks is relatively frequent and usually done manually, which results in low manufacturing efficiency. Furthermore, different workers use different vibration and pouring techniques, which can easily lead to errors in the performance of the same batch of concrete test blocks.

[0006] Therefore, there is a need for an automated concrete specimen preparation device that can automate the preparation of concrete specimens, improve preparation efficiency, and reduce performance errors in the same batch of concrete specimens. Summary of the Invention

[0007] In order to overcome the shortcomings of the prior art, one object of the present invention is to provide an automated concrete test block preparation device, which can realize the automated preparation of concrete test blocks, improve the preparation efficiency, reduce the performance error of the same batch of concrete test blocks, and is suitable for large-scale promotion and application.

[0008] One objective of this invention is to provide an automated concrete specimen preparation device, which is ingeniously designed, simple in structure, easy to manufacture, and low in manufacturing cost, making it suitable for large-scale application.

[0009] To achieve the above objectives, the present invention provides an automated concrete specimen preparation device, characterized in that it includes a horizontal cylinder, a feeding channel, a discharging channel, a spraying unit, a vibration unit, a front turntable, a rear turntable, a front drive device, a rear drive device, a mold cavity unit, a first gear, and a discharge drive device, wherein:

[0010] The horizontal cylinder is horizontally arranged along the front-to-back direction. The feeding channel and the discharging channel are both arranged along the front-to-back direction and inclined in the left-to-right direction. The left end of the feeding channel is lower than the right end of the feeding channel and is installed in the upper right part of the horizontal cylinder and connects to the interior of the horizontal cylinder. The right end of the discharging channel is higher than the left end of the discharging channel and is installed in the lower left part of the horizontal cylinder and connects to the interior of the horizontal cylinder.

[0011] The spraying unit includes a storage box and a spray head. The storage box is horizontally arranged and positioned on the top of the horizontal cylinder along the front-back direction. The spray head is vertically arranged and facing downwards. The lower end of the spray head is located inside the horizontal cylinder, and the upper end of the spray head is vertically inserted into the top of the horizontal cylinder and the bottom of the storage box and communicates with the interior of the storage box.

[0012] The vibration unit includes a central shaft, a telescopic device, a mounting plate, and a vibration column. The central shaft is located inside the horizontal cylinder and is coaxially arranged with the horizontal cylinder. The front end and rear end of the central shaft are respectively connected to the front end cover and rear end cover of the horizontal cylinder. A groove is provided on the bottom side of the middle part of the central shaft along the front-rear direction. The telescopic device is vertically arranged and located below the bottom of the groove and connected to the bottom of the groove. The mounting plate is horizontally arranged and arranged along the front-rear direction. The mounting plate is located below the telescopic device and connected to the telescopic device. The vibration column is vertically arranged and located below the mounting plate and connected to the mounting plate.

[0013] Both the front turntable and the rear turntable are vertically arranged and along the left-right direction, and are spaced apart from each other. Both the front turntable and the rear turntable are located inside the horizontal cylinder and are rotatably sleeved on the front end and the rear end of the central shaft, respectively, around the axis of the horizontal cylinder. The front drive device and the rear drive device are respectively installed on the front end cover and the rear end cover and are respectively connected to the front turntable and the rear turntable for synchronously driving the front turntable and the rear turntable to rotate around the axis of the horizontal cylinder.

[0014] The mold cavity unit includes a first rotating shaft, a second rotating shaft, a mold box assembly, and a second gear. The first rotating shaft and the second rotating shaft are both arranged along the front-rear direction and are coaxially arranged and spaced apart from each other. The first rotating shaft and the second rotating shaft are both located inside the horizontal cylinder and are parallel to the axis of the horizontal cylinder. The first rotating shaft and the second rotating shaft are rotatably connected to the front turntable and the rear turntable around the axis of the first rotating shaft and the axis of the second rotating shaft, respectively. The mold box assembly is located between the first rotating shaft and the second rotating shaft and is connected to the first rotating shaft and the second rotating shaft, respectively. The mold box assembly includes at least two mold boxes, the top of which is open. The at least two mold boxes are connected sequentially along the front-rear direction.

[0015] The mold box assembly is located at the upper right end of the discharge channel. The first gear and the second gear are both vertically arranged and arranged along the left and right directions and are meshed with each other. The first gear is located inside the horizontal cylinder, and the second gear is located between the front turntable and the mold box assembly and is sleeved on the first rotating shaft. The discharge drive device is installed on the front end cover and connected to the first gear to drive the first gear to rotate around the axis of the first gear.

[0016] The number of nozzles and the number of vibrating columns are the same as the number of molds. The nozzles and vibrating columns are arranged at intervals. The mold has a spraying position, a pouring position, and a vibration position. In the spraying position, the nozzle is located above the mold, and the nozzle and the mold are arranged in a one-to-one correspondence. In the pouring position, the mold assembly is located at the lower left of the left end of the feed channel. In the vibration position, the vibrating column is located above the mold, and the vibrating column and the mold are arranged in a one-to-one correspondence.

[0017] Preferably, the front drive device includes a front gear ring, a front gear, and a front drive component. The front gear ring and the front gear are both vertically arranged and along the left-right direction, and are meshed with each other. The front gear ring and the front gear are both located inside the horizontal cylinder. The front gear ring is sleeved on the front turntable. The front drive component is located in front of the front end cover and is installed on the front end cover. The drive shaft of the front drive component is arranged along the front-rear direction and passes through the front end cover along the front-rear direction. It is rotatable relative to the front end cover about the axis of the drive shaft of the front drive component. The front gear is sleeved on the drive shaft of the front drive component.

[0018] Preferably, the rear drive device includes a rear gear ring, a rear gear, and a rear drive component. The rear gear ring and the rear gear are both vertically arranged and along the left-right direction, and are meshed with each other. The rear gear ring and the rear gear are both located inside the horizontal cylinder. The rear gear ring is sleeved on the rear turntable. The rear drive component is located behind the rear end cover and is installed on the rear end cover. The drive shaft of the rear drive component is arranged along the front-rear direction and passes through the rear end cover along the front-rear direction. It is rotatable relative to the rear end cover about the axis of the drive shaft of the rear drive component. The rear gear is sleeved on the drive shaft of the rear drive component.

[0019] Preferably, the discharge drive device is located in front of and installed on the front end cover. The drive shaft of the discharge drive device is arranged along the front-rear direction and passes through the front end cover along the front-rear direction. It is rotatably arranged relative to the front end cover about the axis of the drive shaft of the discharge drive device. The second gear is sleeved on the drive shaft of the discharge drive device.

[0020] Preferably, the mold box further includes an elastic element and a baffle. The bottom side of the right side wall of the mold box is rotatably connected to the right side of the bottom of the mold box in the front-rear direction. The front and rear sides of the right side wall of the mold box abut against the right side of the front side wall and the right side of the rear side wall of the mold box, respectively. The elastic element is located between the bottom side of the right side wall and the right side of the bottom and is connected to the bottom side of the right side wall and the right side of the bottom, respectively, so as to tend to make the front side and the rear side of the right side wall abut against the right side of the front side wall and the right side of the rear side wall, respectively. The baffle is arranged in the front-rear direction and inclined in the left-right direction. The left side of the baffle is lower than the right side of the baffle and is connected to the top side of the right side wall. The automated concrete test block preparation equipment further includes a protrusion. The protrusion is arranged on the inner side wall of the horizontal cylinder and is higher than the right end of the discharge channel and is located on the path of the baffle rotating with the mold box around the axis of the first rotating shaft.

[0021] More preferably, the mold further includes a front mounting base, a rear mounting base, a fixing block, a third rotating shaft, and a fourth rotating shaft. The front mounting base and the rear mounting base are both arranged along the front-rear direction and are spaced apart from each other. The front mounting base and the rear mounting base are both located on the right side of the bottom and are both connected to the right side of the bottom. The fixing block is located between the front mounting base and the rear mounting base, and the bottom side of the right side wall is disposed on the fixing block. The third rotating shaft and the fourth rotating shaft are both arranged along the front-rear direction and are spaced apart from each other. The third rotating shaft and the fourth rotating shaft are both located between the front mounting base and the rear mounting base and are rotatably connected to the front mounting base and the rear mounting base respectively around the front-rear direction. The fixing block is located between the third rotating shaft and the fourth rotating shaft and is connected to the third rotating shaft and the fourth rotating shaft respectively. The elastic element is provided between the third rotating shaft and the front mounting base and between the fourth rotating shaft and the rear mounting base.

[0022] Preferably, the mold cavity unit further includes a fifth rotating shaft, a sixth rotating shaft, a push block, and a stop block. The fifth rotating shaft and the sixth rotating shaft are both arranged along the front-rear direction and are coaxial with the first rotating shaft and the second rotating shaft. The rear end of the fifth rotating shaft is rotatably connected to the front end of the sixth rotating shaft around the front-rear direction. The foremost mold box is the first mold box, and the other mold boxes located after the first mold box are the second mold boxes. The front end of the fifth rotating shaft is located after the first mold box and connected to the first mold box. The rear end of the sixth rotating shaft is located in front of the foremost second mold box and connected to the foremost second mold box. The push block and the stop block are arranged to abut against each other from left to right and are respectively arranged on the rear end of the fifth rotating shaft and the front end of the sixth rotating shaft.

[0023] Preferably, the mold assembly further includes counterweights located below and connected to the mold, the number of counterweights being the same as the number of molds, and the counterweights and molds being arranged in a one-to-one correspondence.

[0024] Preferably, there are multiple mold cavity units, which are arranged at intervals around the central axis.

[0025] More preferably, the number of mold cavity units is four, and the four mold cavity units are evenly spaced around the central axis.

[0026] The main beneficial effects of this invention are:

[0027] 1. The horizontal cylinder of the automated concrete test block preparation equipment of the present invention is equipped with a spraying unit on its top. The upper right and lower left parts of the horizontal cylinder are respectively equipped with a feeding channel and a discharging channel. A vibration unit is located at the center of the horizontal cylinder. A front turntable and a rear turntable are respectively located at the front and rear positions inside the horizontal cylinder. A mold cavity unit is rotatably positioned between the front and rear turntables around its first axis of rotation. The front and rear turntables are driven to rotate synchronously around the axis of the horizontal cylinder by a front drive device and a rear drive device, respectively, thereby driving the mold cavity unit to rotate around the axis of the horizontal cylinder. When it rotates to below the spraying unit, a release agent is sprayed onto the mold box of the mold cavity unit by the spraying unit. Rotation continues until the feeding unit is reached. When the concrete flows into the mold box from the lower left of the channel, it continues to rotate to the bottom of the vibration unit, where the concrete in the mold box is vibrated. After being left to stand, it continues to rotate to the upper right of the discharge channel. The mold cavity unit meshes with the first gear through the second gear, and the discharge drive device drives the first gear to rotate clockwise around its axis, causing the mold cavity unit to rotate counterclockwise around the axis of the second gear. This aligns the opening of the mold box with the discharge channel, allowing the concrete test block to be poured out from the discharge channel. Therefore, it can realize the automated preparation of concrete test blocks, improve preparation efficiency, reduce the performance error of concrete test blocks in the same batch, and is suitable for large-scale promotion and application.

[0028] 2. The horizontal cylinder of the automated concrete test block preparation equipment of the present invention is equipped with a spraying unit on its top. The upper right and lower left parts of the horizontal cylinder are respectively equipped with a feeding channel and a discharging channel. A vibration unit is located at the center of the horizontal cylinder. A front turntable and a rear turntable are respectively located at the front and rear positions inside the horizontal cylinder. The mold cavity unit is rotatably positioned between the front and rear turntables around its first axis of rotation. The front and rear turntables are driven to rotate synchronously around the axis of the horizontal cylinder by a front drive device and a rear drive device, respectively, thereby driving the mold cavity unit to rotate around the axis of the horizontal cylinder. When it rotates to below the spraying unit, the mold box of the mold cavity unit is sprayed and demolded by the spraying unit. As the concrete continues to rotate to the lower left of the feeding channel, it flows into the mold box through the feeding channel. As it continues to rotate to the bottom of the vibration unit, the concrete in the mold box is vibrated by the vibration unit. Then it is left to stand. As it continues to rotate to the upper right of the discharge channel, the mold cavity unit meshes with the first gear through the second gear. The discharge drive device drives the first gear to rotate clockwise around the axis of the first gear, causing the mold cavity unit to rotate counterclockwise around the axis of the second gear. This aligns the opening of the mold box with the discharge channel, allowing the concrete test block to be poured out from the discharge channel. Therefore, its design is ingenious, its structure is simple, its manufacturing is easy, and its manufacturing cost is low, making it suitable for large-scale promotion and application.

[0029] These and other objects, features and advantages of the present invention will be fully apparent from the following detailed description and drawings, and can be achieved by the means, devices and combinations thereof specifically pointed out in the summary of the invention. Attached Figure Description

[0030] Figure 1 This is a three-dimensional schematic diagram of a specific embodiment of the automated concrete test block preparation equipment of the present invention.

[0031] Figure 2 yes Figure 1 The diagram shows a three-dimensional view of the internal structure of a specific embodiment, where the rear gear and rear drive component are not shown.

[0032] Figure 3 yes Figure 1 A perspective view of the components of the front turntable, rear turntable, and mold cavity unit in the specific embodiment shown.

[0033] Figure 4 yes Figure 1 The diagram shows an exploded perspective view of the mold cavity unit in a specific embodiment, wherein the right side wall of the mold box is in an open state.

[0034] Figure 5 yes Figure 4 A magnified view of a portion of the image.

[0035] Figure 6 yes Figure 1 The three-dimensional cross-sectional view of the specific embodiment shown is shown. Figure 1 .

[0036] Figure 7 yes Figure 1 The schematic diagram of the front cross section of the specific embodiment shown shows the mold rotating counterclockwise (viewed from front to back) about the axis of the first pivot until the baffle touches the protrusion.

[0037] Figure 8 yes Figure 7 Enlarged schematic diagram of region A in the middle.

[0038] Figure 9 yes Figure 1 The three-dimensional cross-sectional view of the specific embodiment shown is shown. Figure 2 The mold cavity unit is not shown.

[0039] Figure 10 yes Figure 1 A perspective view of the components of the vibratory unit, including the telescopic device, mounting plate, and vibratory column, in the specific embodiment shown.

[0040] (Symbol Explanation)

[0041] 1 Horizontal cylinder; 2 Feed channel; 3 Discharge channel; 4 Spraying unit; 5 Vibration unit; 6 Front turntable; 7 Rear turntable; 8 Front drive device; 9 Rear drive device; 10 Mold cavity unit; 11 First gear; 12 Discharge drive device; 13 Storage box; 14 Spray nozzle; 15 Central shaft; 16 Telescopic device; 17 Mounting plate; 18 Vibration column; 19 Groove; 20 First rotating shaft; 21 Second rotating shaft; 22 Mold box assembly; 23 Second gear; 24 Mold box; 25 Front gear ring; 26 Front gear; 27 Front drive component; 28 Rear gear ring; 29 Elastic element; 30 Baffle; 31 Protrusion; 32 Front mounting seat; 33 Rear mounting seat; 34 Fixing block; 35 Third rotating shaft; 36 Fourth rotating shaft; 37 Fifth rotating shaft; 38 Sixth rotating shaft; 39 Push block; 40 Stop block; 41 Counterweight block; 42 Left support; 43 Right support. Detailed Implementation

[0042] To better understand the technical content of this invention, the following embodiments are provided for detailed explanation.

[0043] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0044] Please see Figures 1-10 As shown, in a specific embodiment of the present invention, the automated concrete test block preparation equipment of the present invention includes a horizontal cylinder 1, a feeding channel 2, a discharging channel 3, a spraying unit 4, a vibration unit 5, a front turntable 6, a rear turntable 7, a front drive device 8, a rear drive device 9, a mold cavity unit 10, a first gear 11, and a discharge drive device 12, wherein:

[0045] The horizontal cylinder 1 is horizontally arranged along the front-to-back direction. The feeding channel 2 and the discharging channel 3 are both arranged along the front-to-back direction and are inclined in the left-to-right direction. The left end of the feeding channel 2 is lower than the right end of the feeding channel 2 and is installed in the upper right part of the horizontal cylinder 1 and connects to the interior of the horizontal cylinder 1. The right end of the discharging channel 3 is higher than the left end of the discharging channel 3 and is installed in the lower left part of the horizontal cylinder 1 and connects to the interior of the horizontal cylinder 1.

[0046] The spraying unit 4 includes a storage box 13 and a spray nozzle 14. The storage box 13 is horizontally arranged and positioned on the top of the horizontal cylinder 1 along the front-back direction. The spray nozzle 14 is vertically arranged and facing downwards. The lower end of the spray nozzle 14 is located inside the horizontal cylinder 1, and the upper end of the spray nozzle 14 is vertically inserted into the top of the horizontal cylinder 1 and the bottom of the storage box 13 and communicates with the interior of the storage box.

[0047] The vibration unit 5 includes a central shaft 15, a telescopic device 16, a mounting plate 17, and a vibration column 18. The central shaft 15 is located inside the horizontal cylinder 1 and is coaxially arranged with the horizontal cylinder 1. The front end and rear end of the central shaft 15 are respectively connected to the front end cover and rear end cover of the horizontal cylinder 1. A groove 19 is provided on the bottom side of the middle part of the central shaft 15 along the front-rear direction. The telescopic device 16 is vertically arranged and located below the groove 19 and connected to the bottom of the groove 19. The mounting plate 17 is horizontally arranged and arranged along the front-rear direction. The mounting plate 17 is located below the telescopic device 16 and connected to the telescopic device 16. The vibration column 18 is vertically arranged and located below the mounting plate 17 and connected to the mounting plate 17.

[0048] The front turntable 6 and the rear turntable 7 are both vertically arranged and along the left-right direction, and are spaced apart from each other. The front turntable 6 and the rear turntable 7 are both located inside the horizontal cylinder 1 and are rotatably sleeved on the front end and the rear end of the central shaft 15 around the axis of the horizontal cylinder 1, respectively. The front drive device 8 and the rear drive device 9 are respectively installed on the front end cover and the rear end cover and are respectively connected to the front turntable 6 and the rear turntable 7 for synchronously driving the front turntable 6 and the rear turntable 7 to rotate around the axis of the horizontal cylinder 1.

[0049] The mold cavity unit 10 includes a first rotating shaft 20, a second rotating shaft 21, a mold box assembly 22, and a second gear 23. The first rotating shaft 20 and the second rotating shaft 21 are both arranged along the front-rear direction and are coaxially arranged and spaced apart from each other. The first rotating shaft 20 and the second rotating shaft 21 are both located inside the horizontal cylinder 1 and are both parallel to the axis of the horizontal cylinder 1. The first rotating shaft 20 and the second rotating shaft 21 are rotatably connected to the front turntable 6 and the rear turntable 7 around the axis of the first rotating shaft 20 and the axis of the second rotating shaft 21, respectively. The mold box assembly 22 is located between the first rotating shaft 20 and the second rotating shaft 21 and is connected to the first rotating shaft 20 and the second rotating shaft 21, respectively. The mold box assembly 22 includes at least two mold boxes 24. The top of the mold box 24 is open. At least two mold boxes 24 are connected sequentially along the front-rear direction.

[0050] The mold box assembly 22 is located at the upper right of the right end of the discharge channel 3. The first gear 11 and the second gear 23 are both vertically arranged and arranged along the left and right directions and are meshed with each other. The first gear 11 is located inside the horizontal cylinder 1, and the second gear 23 is located between the front turntable 6 and the mold box assembly 22 and is sleeved on the first rotating shaft 20. The discharge drive device 12 is installed on the front end cover and connected to the first gear 11 to drive the first gear 11 to rotate around the axis of the first gear 11.

[0051] The number of nozzles 14 and the number of vibrating columns 18 are the same as the number of mold boxes 24. The nozzles 14 and the vibrating columns 18 are arranged at intervals. The mold box 24 has a spraying position, a pouring position, and a vibration position. In the spraying position, the nozzles 14 are located above the mold box 24, and the nozzles 14 and the mold box 24 are arranged in a one-to-one correspondence. In the pouring position, the mold box assembly 22 is located at the lower left of the left end of the feed channel 2. In the vibration position, the vibrating columns 18 are located above the mold box 24, and the vibrating columns 18 and the mold box 24 are arranged in a one-to-one correspondence.

[0052] In the above configuration, the mold cavity unit 10 is used to manufacture concrete test blocks, the spraying unit 4 is used to spray release agent, and the vibration unit 5 is used to vibrate concrete; in addition, in the above description, the mold box assembly 22 is located at the upper right of the right end of the discharge channel 3, at which time the mold box assembly 22 is located at the discharge position.

[0053] The front drive unit 8 can have any suitable configuration; please refer to [link / reference]. Figures 1-3 As shown, in a specific embodiment of the present invention, the front drive device 8 includes a front gear ring 25, a front gear 26, and a front drive component 27. The front gear ring 25 and the front gear 26 are both vertically arranged and arranged along the left-right direction and are meshed with each other. The front gear ring 25 and the front gear 26 are both located inside the horizontal cylinder 1. The front gear ring 25 is sleeved on the front turntable 6. The front drive component 27 is located in front of the front end cover and is installed on the front end cover. The drive shaft of the front drive component 27 is arranged along the front-rear direction and passes through the front end cover along the front-rear direction. It is rotatably arranged relative to the front end cover around the axis of the drive shaft of the front drive component 27. The front gear 26 is sleeved on the drive shaft of the front drive component 27. With the above configuration, the front gear 26 rotates around the axis of the drive shaft of the front drive component 27, thereby causing the front gear ring 25 and the front turntable 6 therein to rotate around the axis of the horizontal cylinder 1.

[0054] The front drive component 27 can be any suitable drive component. In one specific embodiment of the present invention, the front drive component 27 is a motor.

[0055] The rear drive unit 9 can have any suitable configuration; please refer to [link / reference]. Figures 2-3 As shown, in a specific embodiment of the present invention, the rear drive device 9 includes a rear gear ring 28, a rear gear (not shown in the figure), and a rear drive component (not shown in the figure). Both the rear gear ring 28 and the rear gear are vertically arranged and aligned along the left-right direction, meshing with each other. Both the rear gear ring 28 and the rear gear are located inside the horizontal cylinder 1. The rear gear ring 28 is sleeved on the rear turntable 7. The rear drive component is located behind the rear end cover and mounted on it. The drive shaft of the rear drive component is arranged along the front-rear direction and passes through the rear end cover along the front-rear direction, rotatably oriented relative to the rear end cover around the axis of the drive shaft. The rear gear is sleeved on the drive shaft of the rear drive component. With the above arrangement, the rotation of the drive shaft of the rear drive component around its axis drives the rear gear to rotate around the axis of the drive shaft, causing the rear gear ring 28 and the rear turntable 7 within it to rotate around the axis of the horizontal cylinder 1.

[0056] The rear drive component can be any suitable drive component; in one specific embodiment of the present invention, the rear drive component is a motor.

[0057] The discharge drive device 12 is mounted on the front end cover and connected to the first gear 11. It can employ any suitable structure; please refer to [link / reference needed]. Figures 1-3 and Figures 6-8 As shown, in a specific embodiment of the present invention, the discharge drive device 12 is located in front of and installed on the front end cover. The drive shaft of the discharge drive device 12 is arranged along the front-rear direction and passes through the front end cover along the front-rear direction, and is rotatably arranged relative to the front end cover about the axis of the drive shaft of the discharge drive device 12. The second gear 23 is sleeved on the drive shaft of the discharge drive device 12. With the above arrangement, the rotation of the drive shaft of the discharge drive device 12 about the axis of the drive shaft of the discharge drive device 12 drives the first gear 11 to rotate about the axis of the drive shaft of the discharge drive device 12, which is the axis of the first gear 11. This causes the second gear 23 to rotate about the axis of the second gear 23, which is the axis of the first rotating shaft 20. This drives the first rotating shaft 20 and the mold box 24 connected to it to rotate about the axis of the first rotating shaft 20.

[0058] The discharge drive device 12 can be any suitable drive device. In a specific embodiment of the present invention, the discharge drive device 12 is a motor.

[0059] The mold 24 may also include any other suitable configuration; please refer to [link / reference]. Figures 2-8 As shown, in a specific embodiment of the present invention, the mold 24 further includes an elastic member 29 and a baffle 30. The bottom side of the right side wall of the mold 24 is rotatably connected to the right side of the bottom of the mold 24 about the front-rear direction. The front and rear sides of the right side wall of the mold 24 abut against the right side of the front side wall and the right side of the rear side wall of the mold 24, respectively. The elastic member 29 is located between the bottom side of the right side wall and the right side of the bottom and is connected to the bottom side of the right side wall and the right side of the bottom, respectively, to tend to cause the front side of the right side wall and the right side of the bottom to... The rear side of the right side wall abuts against the right side of the front side wall and the right side of the rear side wall respectively. The baffle 30 is arranged along the front-back direction and inclined along the left-right direction. The left side of the baffle 30 is lower than the right side of the baffle 30 and connects to the top side of the right side wall. The automated concrete test block preparation equipment also includes a protrusion 31. The protrusion 31 is arranged on the inner side wall of the horizontal cylinder 1 and is higher than the right end of the discharge channel 3 and is located on the path of the baffle 30 rotating with the mold box 24 around the axis of the first rotating shaft 20.

[0060] With the above configuration, viewed from front to back, when the discharge drive device 12 drives the first gear 11 to rotate clockwise around the axis of the first gear 11, causing the second gear 23 to rotate counterclockwise around the axis of the second gear 23, which is also the axis of the first rotating shaft 20, and driving the first rotating shaft 20 and the mold box 24 connected to it to rotate counterclockwise around the axis of the first rotating shaft 20, since the protrusion 31 is located on the path of the baffle 30 rotating with the mold box 24 around the axis of the first rotating shaft 20, before the opening of the mold box 24 is aligned with the discharge channel 3, the baffle 30 will strike the protrusion 31 (see...). Figure 8 Due to the obstruction of the protrusion 31, the baffle 30 and the right side wall connected to it can no longer rotate counterclockwise around the axis of the first rotating shaft 20 with the mold box 24. The mold box 24 continues to rotate counterclockwise around the axis of the first rotating shaft 20 until the opening of the mold box 24 is aligned with the discharge channel 3. During this process, the opening of the mold box 24 becomes larger, which facilitates the concrete test block to fall out and then fall out through the discharge channel 3. The impact force brought by the impact makes it easier for the concrete test block to fall out, which is beneficial to the demolding of the concrete test block.

[0061] The bottom side of the right side wall of the mold 24 is rotatably connected to the right side of the bottom of the mold 24 in the front-back direction. The elastic member 29 is located between the bottom side of the right side wall and the right side of the bottom, and connects the bottom side of the right side wall and the right side of the bottom respectively. Any suitable structure can be adopted. Please refer to [link / reference]. Figures 4-5 As shown, in a specific embodiment of the present invention, the mold box 24 further includes a front mounting base 32, a rear mounting base 33, a fixing block 34, a third rotating shaft 35, and a fourth rotating shaft 36. The front mounting base 32 and the rear mounting base 33 are both arranged along the front-rear direction and are spaced apart from each other. Both the front mounting base 32 and the rear mounting base 33 are located on the right side of the bottom and are connected to the right side of the bottom. The fixing block 34 is located between the front mounting base 32 and the rear mounting base 33. The bottom side of the right side wall is disposed on the fixing block 34. The third rotating shaft 35 and the... The fourth rotating shaft 36 is arranged along the front-back direction and spaced apart from each other. The third rotating shaft 35 and the fourth rotating shaft 36 are both located between the front mounting base 32 and the rear mounting base 33 and are rotatably connected to the front mounting base 32 and the rear mounting base 33 respectively around the front-back direction. The fixing block 34 is located between the third rotating shaft 35 and the fourth rotating shaft 36 and is connected to the third rotating shaft 35 and the fourth rotating shaft 36 respectively. The elastic element 29 is provided between the third rotating shaft 35 and the front mounting base 32 and between the fourth rotating shaft 36 and the rear mounting base 33.

[0062] The elastic element 29 can be any suitable elastic element; please refer to [link / reference]. Figure 5 As shown, in a specific embodiment of the present invention, the elastic element 29 is a torsion spring, and the torsion spring is sleeved on both the third rotating shaft 35 and the fourth rotating shaft 36.

[0063] The mold cavity unit 10 may also include any other suitable configuration; please refer to [link / reference]. Figure 2 and Figure 4As shown, in a specific embodiment of the present invention, the mold cavity unit 10 further includes a fifth rotating shaft 37, a sixth rotating shaft 38, a pusher block 39, and a stop block 40. The fifth rotating shaft 37 and the sixth rotating shaft 38 are both arranged along the front-rear direction and are coaxial with the first rotating shaft 20 and the second rotating shaft 21. The rear end of the fifth rotating shaft 37 is rotatably connected to the front end of the sixth rotating shaft 38 around the front-rear direction. The foremost mold box 24 is the first mold box, and the other mold boxes 24 located after the first mold box are the second mold boxes. The front end of the fifth rotating shaft 37 is located after the first mold box and connected to the first mold box. The rear end of the sixth rotating shaft 38 is located in front of the foremost second mold box and connected to the foremost second mold box. The pusher block 39 and the stop block 40 are arranged to abut against each other from left to right and are respectively arranged on the rear end of the fifth rotating shaft 37 and the front end of the sixth rotating shaft 38.

[0064] With the above configuration, viewed from front to back, when the discharge drive device 12 drives the first gear 11 to rotate clockwise around its axis, causing the second gear 23 to rotate counterclockwise around its axis, which is also the axis of the first rotating shaft 20, and driving the first rotating shaft 20 and the first mold box connected to it to rotate counterclockwise around the axis of the first rotating shaft 20, since the rear end of the fifth rotating shaft 37 is rotatably connected to the front end of the sixth rotating shaft 38 around the front-back direction and the push block 39 is located to the left of the stop block 40, the push block 39 gradually moves away from the stop block 40, while the sixth rotating shaft 38 remains stationary, and the second mold box also remains stationary. Therefore, the second mold box does not rotate with the first mold box around the first rotating shaft 20. The first mold box rotates counterclockwise, and the concrete test block in the first mold box falls out through the discharge channel 3. The batch of concrete is checked for qualification and placed on site as a concrete test block for on-site curing. The first mold box continues to rotate counterclockwise until the push block 39 rotates to the right side of the stop block 40 and abuts against the stop block 40. The first mold box continues to rotate counterclockwise, and the push block 39 pushes the stop block 40, so that the sixth rotating shaft 38 follows the fifth rotating shaft 37 to rotate counterclockwise around the axis of the first rotating shaft 20. As a result, the second mold box rotates counterclockwise around the axis of the first rotating shaft 20. The concrete test block in the second mold box falls out through the discharge channel 3 and is placed in the standard curing box as a concrete test block for curing in the standard curing box.

[0065] The rear end of the fifth rotating shaft 37 is rotatably connected to the front end of the sixth rotating shaft 38 around the front-rear direction. Any suitable structure can be used; please refer to [link / reference]. Figure 2 and Figure 4As shown, in a specific embodiment of the present invention, the rear end of the fifth rotating shaft 37 is rotatably inserted into the front end of the sixth rotating shaft 38 about the front-rear direction.

[0066] The number of the second mold boxes can be determined as needed; please refer to [link / reference]. Figures 2-4 and Figure 6 As shown, in a specific embodiment of the present invention, the number of the second mold box is 2, that is, the number of the mold box 24 is 3.

[0067] The mold assembly 22 may also include any other suitable configurations; please refer to [link / reference]. Figures 6-7 As shown, in a specific embodiment of the present invention, the mold assembly 22 further includes a counterweight 41. The counterweight 41 is located below and connected to the mold 24. The number of counterweights 41 is the same as the number of molds 24, and the counterweights 41 and molds 24 are arranged in a one-to-one correspondence. With the above arrangement, the counterweights 41 can keep the top opening of the mold 24 facing upwards in the normal state.

[0068] The number of mold cavity units 10 can be determined as needed. Preferably, there are multiple mold cavity units 10, which are arranged at intervals around the central axis 15. This arrangement allows for the continuous preparation of concrete test blocks, is suitable for the continuous production of concrete test blocks, and enables mechanized manufacturing of concrete test blocks, further improving preparation efficiency. Please refer to [link to previous text]. Figures 2-3 , Figure 6 and Figure 7 As shown, in a specific embodiment of the present invention, the number of the mold cavity units 10 is 4, and the 4 mold cavity units 10 are evenly spaced around the central axis 15.

[0069] The number of the telescopic devices 16 can be determined as needed; please refer to [link / reference]. Figure 2 and Figure 10 As shown, in a specific embodiment of the present invention, there are two telescopic devices 16, which are arranged at intervals from each other.

[0070] The telescopic device 16 can be any suitable telescopic device. In a specific embodiment of the present invention, the telescopic device 16 is a telescopic rod.

[0071] The automated concrete test block preparation equipment may also include any other suitable components; please refer to [link / reference]. Figures 1-2 , Figure 6 , Figure 7 and Figure 9As shown, in a specific embodiment of the present invention, the automated concrete test block preparation equipment may also have a left support 42 and a right support 43. The left support 42 and the right support 43 are both vertically arranged and arranged along the left-right direction and are spaced apart from each other. The horizontal cylinder 1 is arranged on the left support 42 and the right support 43.

[0072] For concrete with the same mix proportion, concrete test blocks are made at least once for every 100 cubic meters. One part is placed on-site for curing, and the other part is placed in a standard curing box. Because concrete test blocks need to be made frequently, in order to improve manufacturing efficiency and reduce errors caused by manual manufacturing, this invention is placed next to the concrete mixer. For every 100 cubic meters of concrete used, a certain amount of concrete is poured into the feed channel 2 of this invention.

[0073] In use, viewed from front to back, the front drive device 8 and the rear drive device 9 drive the front turntable 6 and the rear turntable 7 to rotate synchronously clockwise around the axis of the horizontal cylinder 1, thereby driving the mold cavity unit 10 to rotate clockwise around the axis of the horizontal cylinder 1. The second gear 23 disengages from the first gear 11. Since the first rotating shaft 20 and the second rotating shaft 21 are rotatably connected to the front turntable 6 and the rear turntable 7 around the axes of the first rotating shaft 20 and the second rotating shaft 21, respectively, under the action of gravity, the opening at the top of the mold box 24 always faces upward. When rotating to the spraying position, the nozzle 14 is located above the mold box 24, and the release agent in the storage box 13 is sprayed into the mold box 24 through the nozzle 14. Continuing to rotate to the pouring position, the mold box assembly 22 is located at the lower left of the left end of the feed channel 2. At this time, concrete is poured into the feed channel 2, and the concrete flows into the mold box 24 through the feed channel 2. Continuing to rotate to the vibration position, the vibrating column 18 is located above the mold box 24 and extends and retracts. The device 16 extends downward, causing the mounting plate 17 to move downward, which in turn moves the vibrating column 18 downward and inserts it into the concrete in the mold box 24 for vibration. After vibration, the telescopic device 16 shortens upward, causing the mounting plate 17 to move upward, which in turn moves the vibrating column 18 upward and removes it from the concrete in the mold box 24. After the concrete in the mold box 24 is left to stand for a period of time, it continues to rotate to the discharge position. At this time, the mold box assembly 22 is located at the upper right of the right end of the discharge channel 3. The mold cavity unit 10 meshes with the first gear 11 through the second gear 23. The discharge drive device 12 drives the first gear 11 to rotate clockwise around the axis of the first gear 11, causing the mold cavity unit 10 to rotate counterclockwise around the axis of the second gear 23, so that the opening of the mold box 24 is aligned with the discharge channel 3, so that the concrete test block falls out of the opening of the mold box 24 and is discharged through the discharge channel 3. Part of it is used as a concrete test block for on-site curing, and the other part is used as a concrete test block placed in a standard curing box for curing.

[0074] With the counterweight 41 present, when the concrete test block is discharged, the mold box 24 flips over, causing the baffle 30 to hit the protrusion 31. The presence of the counterweight 41 increases the inertia, which is more conducive to the demolding and dropping of the concrete test block.

[0075] Therefore, the present invention has the following beneficial effects:

[0076] 1. This invention, by setting up a spraying unit, a feeding channel, a vibration unit, and a mold cavity unit, can mechanize the manufacturing of concrete test blocks, improve manufacturing efficiency, and reduce the performance error of concrete test blocks in the same batch.

[0077] 2. By setting up elastic elements, baffles and protrusions, when the mold box is flipped, the baffle hits the protrusion, and the protrusion opens the baffle and the right side wall connected to it, making the opening at the top of the mold box larger, avoiding jamming of the concrete test block. The impact force makes the concrete test block easier to loosen, which is conducive to demolding the concrete test block.

[0078] 3. This invention, by setting up a first mold box and a second mold box, allows the concrete test blocks to be released from the first mold box first when the concrete test blocks are flipped and released. The concrete test blocks are then checked to see if the batch of concrete is qualified and placed on site for curing. The concrete test blocks are then released from the second mold box and placed in a standard curing box for curing. This method is simple and convenient to use.

[0079] 4. By setting up multiple mold cavity units, this invention can continuously prepare concrete test blocks, which is suitable for the continuous production of concrete test blocks and further improves the preparation efficiency.

[0080] In summary, the automated concrete specimen preparation equipment of the present invention can realize the automated preparation of concrete specimens, improve preparation efficiency, reduce the performance error of the same batch of concrete specimens, and has a clever design, simple structure, easy manufacturing, and low manufacturing cost, making it suitable for large-scale promotion and application.

[0081] Therefore, it is evident that the objective of this invention has been fully and effectively achieved. The function and structural principles of this invention have been demonstrated and explained in the embodiments. Any modifications can be made to the implementation methods without departing from these principles. Therefore, this invention includes all modified embodiments based on the spirit and scope of the claims.

Claims

1. An apparatus for the automated production of concrete test blocks, characterized in that The application relates to a horizontal cylinder, a feeding channel, a discharging channel, a spraying unit, a vibrating unit, a front rotary disc, a rear rotary disc, a front driving device, a rear driving device, a mold cavity unit, a first gear and a discharging driving device. The horizontal cylinder is horizontally arranged and arranged along a front-rear direction; the feeding channel and the discharging channel are both arranged along the front-rear direction and are both arranged to be inclined along a left-right direction; the left end of the feeding channel is lower than the right end of the feeding channel, is arranged on the right upper portion of the horizontal cylinder and is communicated with the inside of the horizontal cylinder; and the right end of the discharging channel is higher than the left end of the discharging channel, is arranged on the left lower portion of the horizontal cylinder and is communicated with the inside of the horizontal cylinder. The spraying unit comprises a storage box and a spraying head; the storage box is horizontally arranged and arranged on the top of the horizontal cylinder along the front-rear direction; the spraying head is vertically arranged and arranged downward; the lower end of the spraying head is located in the horizontal cylinder; and the upper end of the spraying head is vertically inserted into the top of the horizontal cylinder and the bottom of the storage box and is communicated with the inside of the storage box. The vibrating unit comprises a central shaft, an extension device, a mounting plate and a vibrating column; the central shaft is located in the horizontal cylinder and is coaxially arranged with the horizontal cylinder; the front end and the rear end of the central shaft are connected with the front end cover and the rear end cover of the horizontal cylinder respectively; the bottom side of the middle portion of the central shaft is provided with a groove along the front-rear direction; the extension device is vertically arranged and located below the groove bottom and is connected with the groove bottom; the mounting plate is horizontally arranged and arranged along the front-rear direction; the mounting plate is located below the extension device and is connected with the extension device; and the vibrating column is vertically arranged and located below the mounting plate and is connected with the mounting plate. The front rotary disc and the rear rotary disc are both vertically arranged and arranged along the left-right direction and are arranged to be spaced apart from each other along the front-rear direction; the front rotary disc and the rear rotary disc are both located in the horizontal cylinder and are rotatably sleeved on the front end of the central shaft and the rear end of the central shaft along the axis of the horizontal cylinder respectively; the front driving device and the rear driving device are arranged on the front end cover and the rear end cover respectively and are connected with the front rotary disc and the rear rotary disc respectively to synchronously drive the front rotary disc and the rear rotary disc to rotate along the axis of the horizontal cylinder. The mold cavity unit comprises a first rotary shaft, a second rotary shaft, a mold box assembly and a second gear; the first rotary shaft and the second rotary shaft are both arranged along the front-rear direction, are coaxially arranged and are arranged to be spaced apart from each other along the front-rear direction; the first rotary shaft and the second rotary shaft are both located in the horizontal cylinder and are parallel to the axis of the horizontal cylinder; the first rotary shaft and the second rotary shaft are rotatably connected with the front rotary disc and the rear rotary disc along the axis of the first rotary shaft and the axis of the second rotary shaft respectively; the mold box assembly is located between the first rotary shaft and the second rotary shaft and is connected with the first rotary shaft and the second rotary shaft respectively; the mold box assembly comprises at least two mold boxes; the top of the mold box is open; and the at least two mold boxes are sequentially arranged along the front-rear direction. The mold box assembly is located right above the right end of the discharging channel, the first gear and the second gear are both vertically arranged and arranged along the left-right direction and meshed with each other, the first gear is located in the horizontal cylinder, the second gear is located between the front rotating disc and the mold box assembly and is sleeved on the first rotating shaft, the discharging driving device is installed on the front end cover and connected with the first gear for driving the first gear to rotate around the axis of the first gear; The number of the spray heads and the number of the vibrating columns are the same as the number of the mold boxes, the spray heads and the vibrating columns are arranged in front of and behind each other, the mold boxes have a spraying position, a pouring position and a vibrating position, at the spraying position, the spray heads are located above the mold boxes, the spray heads and the mold boxes are arranged one by one, at the pouring position, the mold box assembly is located below the left end of the feeding channel, at the vibrating position, the vibrating columns are located above the mold boxes, the vibrating columns and the mold boxes are arranged one by one.

2. The concrete test block automated preparation apparatus of claim 1, wherein, The front driving device comprises a front gear ring, a front gear and a front driving component, the front gear ring and the front gear are both vertically arranged and arranged along the left-right direction and meshed with each other, the front gear ring and the front gear are both located in the horizontal cylinder, the front gear ring is sleeved outside the front rotating disc, the front driving component is located in front of the front end cover and is installed on the front end cover, a driving shaft of the front driving component is arranged along the front-rear direction and penetrates through the front end cover along the front-rear direction and is rotatably arranged relative to the front end cover around the axis of the driving shaft of the front driving component, the front gear is sleeved on the driving shaft of the front driving component.

3. The concrete test block automated preparation apparatus of claim 1, wherein, The rear driving device comprises a rear gear ring, a rear gear and a rear driving component, the rear gear ring and the rear gear are both vertically arranged and arranged along the left-right direction and meshed with each other, the rear gear ring and the rear gear are both located in the horizontal cylinder, the rear gear ring is sleeved outside the rear rotating disc, the rear driving component is located behind the rear end cover and is installed on the rear end cover, a driving shaft of the rear driving component is arranged along the front-rear direction and penetrates through the rear end cover along the front-rear direction and is rotatably arranged relative to the rear end cover around the axis of the driving shaft of the rear driving component, the rear gear is sleeved on the driving shaft of the rear driving component.

4. The concrete test block automated preparation apparatus of claim 1, wherein, The discharging driving device is located in front of the front end cover and is installed on the front end cover, a driving shaft of the discharging driving device is arranged along the front-rear direction and penetrates through the front end cover along the front-rear direction and is rotatably arranged relative to the front end cover around the axis of the driving shaft of the discharging driving device, the second gear is sleeved on the driving shaft of the discharging driving device.

5. The concrete test block automated preparation apparatus of claim 1, wherein, The mold box further comprises an elastic member and a baffle, the bottom side of the right side wall of the mold box is rotatably connected to the right side of the bottom of the mold box in the front-rear direction, the front side and the rear side of the right side wall of the mold box abut against the right side of the front side wall and the right side of the rear side wall of the mold box respectively, the elastic member is located between the bottom side of the right side wall and the right side of the bottom and connects the bottom side of the right side wall and the right side of the bottom respectively to tend to make the front side of the right side wall and the rear side of the right side wall abut against the right side of the front side wall and the right side of the rear side wall respectively, the baffle is arranged in the front-rear direction and is arranged obliquely in the left-right direction, the left side of the baffle is lower than the right side of the baffle and is connected to the top side of the right side wall, and the concrete block automatic preparation equipment further comprises a protrusion, the protrusion is arranged on the inner side wall of the horizontal cylinder and is higher than the right end of the discharging channel and is located on the path of the baffle rotating with the mold box around the axis of the first rotating shaft.

6. The concrete test block automated preparation apparatus of claim 5, wherein, The mold box further comprises a front mounting seat, a rear mounting seat, a fixed block, a third rotating shaft and a fourth rotating shaft, the front mounting seat and the rear mounting seat are arranged in the front-rear direction and are arranged spaced apart from each other in the front-rear direction, the front mounting seat and the rear mounting seat are located to the right of the right side of the bottom and are connected to the right side of the bottom, the fixed block is located between the front mounting seat and the rear mounting seat, the bottom side of the right side wall is arranged on the fixed block, the third rotating shaft and the fourth rotating shaft are arranged in the front-rear direction and are arranged spaced apart from each other in the front-rear direction, the third rotating shaft and the fourth rotating shaft are located between the front mounting seat and the rear mounting seat and are rotatably connected to the front mounting seat and the rear mounting seat in the front-rear direction respectively, and the fixed block is located between the third rotating shaft and the fourth rotating shaft and is connected to the third rotating shaft and the fourth rotating shaft respectively.

7. The concrete test block automated preparation apparatus of claim 1, wherein, The mold cavity unit further comprises a fifth rotating shaft, a sixth rotating shaft, a push block and a stop block, the fifth rotating shaft and the sixth rotating shaft are arranged in the front-rear direction and are coaxially arranged with the first rotating shaft and the second rotating shaft, the rear end of the fifth rotating shaft is rotatably connected to the front end of the sixth rotating shaft in the front-rear direction, the frontmost mold box is a first mold box, the other mold boxes behind the first mold box are second mold boxes, the front end of the fifth rotating shaft is located behind the first mold box and is connected to the first mold box, the rear end of the sixth rotating shaft is located in front of the frontmost second mold box and is connected to the frontmost second mold box, and the push block and the stop block are arranged abutting against each other in the left-right direction and are arranged on the rear end of the fifth rotating shaft and the front end of the sixth rotating shaft respectively.

8. The concrete test block automated preparation apparatus of claim 1, wherein, The mold box assembly further comprises counterweights, the counterweights are located below the mold boxes and are connected to the mold boxes, the number of the counterweights is the same as the number of the mold boxes, and the counterweights and the mold boxes are arranged one-to-one.

9. The concrete test block automated preparation apparatus of claim 1, wherein, The number of the mold cavity units is multiple, and the multiple mold cavity units are arranged spaced apart from each other around the central shaft.

10. The concrete test block automated preparation apparatus of claim 9, wherein, The number of the cavity units is 4, and the 4 cavity units are evenly spaced around the central axis.

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