A concrete premixing device and process

Abstract

The present application discloses a concrete premixing device and process, which relates to the field of concrete preparation. It includes a cylinder body, a first stirring rod, a first stirring blade, a driving motor, a feed inlet, a discharge outlet, a second stirring rod and a second stirring blade; the first stirring rod is rotatably arranged in the cylinder body, the first stirring blade is arranged on the first stirring rod, the driving motor is arranged on the cylinder body and is used to drive the first stirring rod to rotate, the feed inlet is opened on the top wall of the cylinder body, a conical discharging part is formed on the lower side of the cylinder body, the discharge outlet is opened on the lower side of the conical discharging part, the second stirring rod is located at the conical discharging part and is arranged to be lifted and lowered at the lower end of the first stirring rod, the second stirring rod rotates coaxially with the first stirring rod, and the second stirring blade is arranged on the second stirring rod. This application helps to improve the mixing effect of concrete and ensure the discharging efficiency.

Description

Technical Field

[0001] This application relates to the field of concrete preparation, and in particular to a concrete premixing device and process. Background Art

[0002] Premixed concrete refers to a concrete mixture that is made by mixing cement, aggregates, water, and, if necessary, admixtures, mineral admixtures, etc. in a certain proportion, metered and mixed, and then sold and transported to the use location by a transport vehicle within a specified time.

[0003] Currently, the mixing of concrete is carried out in a mixing tank. Referring to Figure 1 , a cylindrical barrel 1 is formed on the mixing tank, and a conical discharging part 14 is arranged on the lower side of the barrel 1. The conical discharging part 14 facilitates discharging. A stirring rod is rotatably arranged in the barrel 1 to mix and stir the concrete.

[0004] In practice, the stirring rod does not extend into the conical discharging part. However, when the raw materials are put into the mixing tank, some raw materials will precipitate and accumulate in the conical discharging part, and the stirring effect of the stirring rod on the conical discharging part is very small, which affects the quality of the concrete. Even if the stirring rod extends into the conical discharging part to mix and stir the concrete here, during discharging, the stirring blades at the lower end of the stirring rod will block the concrete here to a certain extent, affecting the discharging efficiency. Summary of the Invention

[0005] In order to improve the mixing effect of concrete and ensure the discharging efficiency, this application provides a concrete premixing device and process.

[0006] The concrete premixing device and process provided by this application adopt the following technical solutions:

[0007] A concrete premixing device includes a barrel, a first stirring rod, a first stirring blade, a driving motor, a feed inlet, a discharge outlet, a second stirring rod, and a second stirring blade; the first stirring rod is rotatably arranged in the barrel, the first stirring blade is arranged on the first stirring rod, the driving motor is arranged on the barrel and used to drive the first stirring rod to rotate, the feed inlet is opened on the top wall of the barrel, a conical discharging part is formed on the lower side of the barrel, the discharge outlet is opened on the lower side of the conical discharging part, the second stirring rod is located at the conical discharging part and is arranged to be lifted and lowered at the lower end of the first stirring rod, the second stirring rod rotates coaxially with the first stirring rod, and the second stirring blade is arranged on the second stirring rod.

[0008] By adopting the above technical solution, a variety of raw materials are put into the cylinder from the feed inlet, the driving motor drives the first stirring rod to rotate, the first stirring rod synchronously drives the second stirring rod to rotate, so as to realize the rotation of the first stirring blade and the second stirring blade. The second stirring blade stirs the conical discharging part, thereby ensuring the mixing effect of the concrete; when discharging, the second stirring rod rises and moves upward from the conical discharging part, which will not hinder the concrete, that is, the discharging efficiency is ensured; that is, through the premixing device of the present application, the mixing effect of the concrete is ensured and the discharging efficiency is not affected.

[0009] Preferably, a plugging groove is formed in the first stirring rod, the second stirring rod is plugged and slidably matched with the plugging groove, a limiting groove is further formed on the inner wall of the first stirring rod, and a limiting block slidably matched with the limiting groove is formed on the circumferential side of the second stirring rod. A driving cylinder is installed in the first stirring rod, the driving cylinder is arranged vertically downward, and the end of the piston rod is connected to the upper end of the second stirring rod. A sealing member for sealing the plugging groove is arranged on the first stirring rod.

[0010] By adopting the above technical solution, the plugging and sliding fit between the plugging groove and the second stirring rod realizes the lifting and sliding fit of the second stirring rod relative to the first stirring rod. Through the cooperation between the limiting groove and the limiting block, the coaxial rotation fit between the first stirring rod and the second stirring rod can be realized; the lifting action of the second stirring rod is realized under the drive of the driving cylinder.

[0011] Preferably, the sealing member is set as a sealing ring gasket. An embedding groove is formed on the inner wall of the plugging groove. The sealing ring gasket is embedded in the embedding groove. A butting ring gasket is integrally formed on the inner side of the sealing ring gasket. A friction part is formed on the side of the butting ring gasket close to the second stirring rod. An arc-shaped elastic piece that can be bent bidirectionally and maintain a bent posture is arranged in the butting ring gasket; when the second stirring rod is in the descending state, the middle part of the arc-shaped elastic piece is bent upward, and when the second stirring rod is in the ascending state, the middle part of the arc-shaped elastic piece is bent downward.

[0012] By adopting the above technical solution, the abutting ring gasket on the sealing ring gasket abuts against the second stirring rod, thereby realizing the sealing of the insertion slot, preventing concrete from entering the insertion slot and affecting the lifting action of the second stirring rod; when the second stirring rod is in the descending state, the middle part of the arc-shaped elastic piece bends upward, and when the second stirring rod rises, under the action of the friction part between the second stirring rod and the abutting ring gasket, the middle part of the arc-shaped elastic piece is gradually driven to bend downward, that is, the end of the abutting ring gasket close to the second stirring rod tilts upward, which can help reduce the friction between the friction part and the second stirring rod and ensure the smooth sliding of the second stirring rod; because when the second stirring rod rises, the concrete in the cylinder will generate resistance to the second stirring blade, that is, generate resistance to the rising of the second stirring rod. At the same time, if the arc-shaped elastic piece remains in the upward-bending state, at this time, the end of the abutting ring gasket bends downward, which will also generate resistance to the second stirring rod. The double resistance will have a greater impact on the rising of the second stirring rod, that is, it will cause a large load on the cylinder and affect the service life.

[0013] Preferably, a butting ring groove is formed on the second stirring rod, a plugging rod is arranged on the top wall of the butting ring groove, a plugging hole is formed on the butting ring gasket, and the orifice of the plugging hole is flared. The plugging rod is inclined and inclined downward and away from the axis of the second stirring rod from top to bottom.

[0014] By adopting the above technical solution, when the second stirring rod is in the descending state, the end of the abutting ring gasket is located in the butting ring groove, and the plugging rod is in plugging fit with the plugging hole. Through the cooperation of the plugging rod and the plugging hole, the abutting ring gasket is fixed and positioned. At this time, the abutting ring gasket is in an upward-bending state, preventing the pressure of the concrete from acting on the abutting ring gasket and causing the arc-shaped elastic piece to bend further, ultimately resulting in a decrease in the sealing effect; when the second stirring rod rises, under the action of the bottom wall of the butting ring groove, the end of the abutting ring gasket will be gradually driven to tilt upward, and finally the abutting ring gasket is in a downward-bending state. When the plugging rod disengages from the plugging hole, the abutting ring gasket tilts upward, so that the shape of the plugging hole can adapt to the disengagement trajectory of the plugging rod, which is convenient for the smooth disengagement of the plugging rod and the plugging hole; when the second stirring rod descends, the abutting ring gasket changes from the downward-bending state to the upward-bending state, and then the end of the abutting ring gasket can smoothly enter the butting ring groove. Because the orifice of the plugging hole is flared, it is convenient for the plugging rod to be inserted into it smoothly.

[0015] Preferably, a plurality of the abutting ring gaskets are provided and are distributed vertically on the inner side of the sealing ring gasket; a plurality of butting ring grooves corresponding to the number of the abutting ring gaskets are provided, plugging rods are arranged in all the butting ring grooves, and the plugging rods in different butting ring grooves are arranged in a vertical dislocation, and the positions of the plugging holes on the abutting ring gasket correspond to the positions of the corresponding plugging rods.

[0016] By adopting the above technical solution, arranging a plurality of abutting ring gaskets to abut against the second stirring rod helps to improve the sealing performance between the second stirring rod and the first stirring rod; arranging all the inserting rods in a staggered manner in the vertical direction can ensure the smooth insertion of the corresponding abutting ring gasket and the corresponding inserting rod.

[0017] Preferably, the seal is a sealing diaphragm, which is in the shape of a frustum of a cone with a larger upper part and a smaller lower part. The upper end of the sealing diaphragm is connected to the lower end of the first stirring rod, and the lower end of the sealing diaphragm is connected to the second stirring rod.

[0018] By adopting the above technical solution, sealing is carried out through the sealing diaphragm, and the sealing diaphragm is not located in the insertion groove, so as to ensure that the lifting and sliding between the second stirring rod and the first stirring rod are more smooth; if the seal is directly arranged in the insertion groove, the friction between the second stirring rod and the first stirring rod is relatively large, and the concrete will also generate resistance to the upward movement of the second stirring rod, resulting in a larger load for the upward movement of the second stirring rod, and ultimately leading to a decrease in the service life of the cylinder.

[0019] Preferably, an abutting rod is hinged to the lower side of the first stirring rod through a torsion spring, and the abutting rod is located inside the sealing diaphragm. In the initial state, the abutting rod is inclined and inclined towards the axis direction of the second stirring rod, and a smooth part is formed at the end of the abutting rod; a connecting block is arranged on the second stirring rod, the lower end of the sealing diaphragm is connected to the lower side of the connecting block, and an inclined guiding part is formed on the upper side of the connecting block; when the second stirring rod rises, under the action of the sealing diaphragm, the smooth part of the abutting rod abuts against the second stirring rod, and when the second stirring rod rises, under the action of the inclined guiding part, the abutting rod will gradually move to the lower side of the connecting block.

[0020] By adopting the above technical solution, the stirring operation is carried out. At this time, the second stirring rod is in the descending state. Under the pressure of the concrete, the sealing diaphragm moves closer to the second stirring rod and drives the abutting rod to abut against the second stirring rod. When discharging is required, the second stirring rod rises. There is a clearance fit between the second stirring rod and the insertion slot, that is, there is only the resistance of the concrete. And because the sealing diaphragm can block the concrete to a certain extent, that is, the concrete is not completely filled on the periphery of the second stirring rod, which can also reduce the resistance of the concrete to the second stirring rod, thereby ensuring the smooth rise of the second stirring rod, greatly reducing the load during rising, and improving the service life of the second stirring rod and the driving cylinder. When the second stirring rod rises, the smooth part of the abutting rod will move relatively downward with respect to the second stirring rod. When the smooth part of the abutting rod moves to the inclined guiding part, it will gradually move to the lower side of the connecting block along the inclined guiding part. And when the second stirring rod rises, the sealing diaphragm will be driven to move upward, and it will also give a force to make the abutting rod close to the second stirring rod. In addition, under the pressure of the concrete, it will also act on the abutting rod, that is, to prevent the abutting rod from resetting under the action of the torsion spring. The abutting rod abuts against the outer wall of the second stirring rod, and can block the concrete around it when the second stirring rod rises, preventing the concrete from adhering to the periphery of the second stirring rod and moving to the insertion slot with it. If particles of a certain size enter the insertion slot, it will cause blockage, greatly affecting the lifting and sliding of the second stirring rod and the first stirring rod. And when the second stirring rod rises, the sealing diaphragm will have frictional sliding relative to the end of the abutting rod. Because when the second stirring rod rises, the discharge port will be opened synchronously, at this time the pressure of the concrete will be greatly reduced. And because when the second stirring rod has not finished rising, the sealing diaphragm outside the abutting rod will be in a relaxed state, so the abutting rod has a tendency to rotate and reset outward under the action of the torsion spring, but under the frictional action of the sealing diaphragm, it will drive the abutting rod to continuously move inward, and because the concrete will also play a certain blocking force below, that is, the abutting rod will not reset, and because of the resetting tendency, it will not abut against the second stirring rod under the movement of the sealing diaphragm, that is, it will not affect the movement of the sealing diaphragm.

[0021] Preferably, the sealing diaphragm is made of rubber material.

[0022] A concrete premixing process uses the above premixing device and includes the following steps:

[0023] S1: Put raw materials into the cylinder;

[0024] S2: The first stirring rod and the second stirring rod rotate synchronously for mixing and stirring;

[0025] S3: After stirring, open the discharge port to discharge the material;

[0026] In step S3, while opening the discharge port to discharge the material, the second stirring rod rises.

[0027] In summary, the present application includes at least one of the following beneficial technical effects:

[0028] 1. By using the liftable second stirring rod, during mixing, the second stirring rod penetrates into the conical discharging part to stir and mix the concrete, ensuring the mixing effect. During discharging, the second stirring rod rises and disengages from the conical discharging part, not hindering the concrete and ensuring the discharging efficiency.

[0029] 2. With the abutting ring pad on the sealing ring pad to seal the insertion slot, preventing concrete from entering the insertion slot and affecting the lifting and sliding of the second stirring rod. And through the arc-shaped elastic piece in the abutting ring pad, it can bend adaptively when the second stirring rod rises or falls, reducing the friction between the abutting ring pad and the second stirring rod, thereby reducing the load of the second stirring rod's lifting and improving the service life of the air cylinder and the second stirring rod.

[0030] 3. Sealed by the sealing diaphragm, with the second stirring rod and the insertion slot in clearance fit, greatly reducing the sliding resistance between the second stirring rod and the insertion slot, ensuring the service life of the device. And when the second stirring rod rises, the abutting rod abuts against its outer wall, which can block the concrete and prevent the concrete from entering the insertion slot along with the second stirring rod to cause blockage, further ensuring the smooth sliding between the second stirring rod and the first stirring rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 is a schematic structural diagram of a premixing device in the related art;

[0032] Figure 2 is a schematic diagram of the overall structure of the first embodiment of the present application;

[0033] Figure 3 is a schematic cross-sectional structure diagram of the first stirring rod in the first embodiment of the present application;

[0034] Figure 4 is Figure 3 a partial enlarged view of A in

[0035] Figure 5 and is a state diagram of the abutting ring pad when the second stirring rod is in the rising state in the first embodiment of the present application;

[0036] Figure 6 is a schematic diagram mainly showing the insertion rod in the second embodiment of the present application;

[0037] Figure 7 is a schematic diagram mainly showing a plurality of abutting ring pads in the third embodiment of the present application;

[0038] Figure 8It is a partial structural schematic diagram of the fourth embodiment of this application, mainly showing the structure of the sealing diaphragm;

[0039] Figure 9 is Figure 8 a partial enlarged view of B in;

[0040] Figure 10 is Figure 8 a partial enlarged view of C in;

[0041] Figure 11 It is a state diagram of the sealing diaphragm and the abutting rod when the second stirring rod starts to rise under the concrete pressure in the fourth embodiment of this application;

[0042] Figure 12 It is a state diagram of the abutting rod moving onto the connecting block in the fourth embodiment of this application;

[0043] Figure 13 It is a state diagram of the abutting rod moving to the lower side of the connecting block in the fourth embodiment of this application.

[0044] Reference numerals: 1, cylinder body; 11, feed inlet; 12, discharge outlet; 13, top cover; 14, conical discharging part; 2, first stirring rod; 21, first stirring blade; 22, insertion slot; 23, limiting slot; 24, mounting plate; 25, embedding slot; 26, first annular groove; 27, driving cylinder; 3, driving motor; 4, second stirring rod; 41, second stirring blade; 42, limiting block; 43, connecting block; 431, second annular groove; 432, inclined guiding part; 5, sealing ring gasket; 51, abutting ring gasket; 511, friction part; 512, insertion hole; 6, arc-shaped elastic sheet; 7, abutting annular groove; 71, insertion rod; 8, sealing diaphragm; 9, abutting rod; 91, smooth part. Detailed implementation manners

[0045] The following Figure 2 - attached Figure 13 further elaborates on this application in detail.

[0046] The embodiment of this application discloses a concrete premixing device.

[0047] Embodiment 1

[0048] Refer to Figure 2, The ready-mixed concrete device includes a cylinder body 1, a first stirring rod 2, a first stirring blade 21, a driving motor 3, a feeding port 11, a discharging port 12, a second stirring rod 4 and a second stirring blade 41. A top cover 13 is provided on the upper side of the cylinder body 1. The second stirring rod 4 is rotatably connected to the top cover 13. The driving motor 3 is drivingly connected to the upper end of the second stirring rod 4 through a pulley structure. The feeding port 11 is opened on the top cover 13. A conical discharging part 14 is formed on the lower side of the cylinder body 1. The discharging port 12 is opened on the lower side of the conical discharging part 14. The second stirring rod 4 is arranged to be lifted and lowered at the lower end of the first stirring rod 2, and the second stirring rod 4 rotates coaxially with the first stirring rod 2. The second stirring rod 4 is used to stir the concrete at the conical discharging part 14. The first stirring blade 21 is arranged on the first stirring rod 2, and the second stirring blade 41 is arranged on the second stirring rod 4.

[0049] A variety of raw materials are put into the cylinder body 1 from the feeding port 11. The driving motor 3 drives the first stirring rod 2 to rotate, and the first stirring rod 2 synchronously drives the second stirring rod 4 to rotate, realizing the mixing and stirring of the concrete. When discharging, the second stirring rod 4 rises and moves upward from the conical discharging part 14, without hindering the concrete. In the prior art, the stirring rod of the concrete mixing device cannot reach deep into the conical discharging part 14, resulting in partial raw materials precipitating and accumulating in the conical discharging part 14, affecting the quality of the concrete. By arranging the conical discharging part 14 on the lower side of the cylinder body 1 and arranging the second stirring rod 4 and the second stirring blade 41 at the conical discharging part 14, and the first stirring rod 2 and the second stirring rod 4 rotating coaxially, it ensures the full stirring of the concrete at the conical discharging part 14 and solves the problem of raw material precipitation. The second stirring rod 4 rises without hindering the concrete, ensuring the discharging efficiency.

[0050] Refer to Figure 2 , Figure 3 and Figure 4 , A plugging slot 22 is formed in the first stirring rod 2. The second stirring rod 4 is plugged and slidably mated with the plugging slot 22. The second stirring rod 4 and the plugging slot 22 form a clearance fit. A limiting slot 23 is also formed on the inner wall of the first stirring rod 2. A limiting block 42 that is slidably mated with the limiting slot 23 is formed on the periphery of the second stirring rod 4. Through the plugging and sliding fit of the second stirring rod 4 and the plugging slot 22, the lifting action of the second stirring rod 4 is realized. With the cooperation of the limiting block 42 and the limiting slot 23, the coaxial rotation of the second stirring rod 4 and the first stirring rod 2 is realized.

[0051] An installation plate 24 is installed in the first stirring rod 2. A driving cylinder 27 is installed on the installation plate 24. The driving cylinder 27 is arranged vertically downward. The end of the piston rod of the driving cylinder 27 is fixedly connected to the upper end of the second stirring rod 4. By operating the driving cylinder 27, the lifting action of the second stirring rod 4 can be realized.

[0052] Specifically, the first stirring rod 2 consists of two sections. After one section is formed, the mounting plate 24 with the driving cylinder 27 installed is welded inside the first stirring rod 2. After the installation is completed, the two sections of the first stirring rod 2 are butted and welded, thereby realizing the installation of the driving cylinder 27.

[0053] Referring to Figure 3 、 Figure 4 and Figure 5 , a seal is provided on the first stirring rod 2 for sealing the insertion slot 22 to prevent concrete from entering the insertion slot 22 and hindering the lifting and sliding of the second stirring rod 4.

[0054] In this embodiment, the seal is set as a sealing ring gasket 5, made of rubber material. An embedding groove 25 is formed on the inner wall of the insertion slot 22, and the sealing ring gasket 5 is embedded in the embedding groove 25. An abutting ring gasket 51 is integrally formed on the inner side of the sealing ring gasket 5. A friction portion 511 is formed on the side of the abutting ring gasket 51 close to the second stirring rod 4. An arc-shaped elastic sheet 6 that can be bent bidirectionally and maintain the bent posture is provided in the abutting ring gasket 51. A plurality of arc-shaped elastic sheets 6 are provided and are spaced apart in the abutting ring gasket 51. The abutting ring gasket 51 and the arc-shaped elastic sheet 6 are prepared by the potting process. When the second stirring rod 4 is in the descending state, the middle part of the arc-shaped elastic sheet 6 is bent upward. When the second stirring rod 4 is in the ascending state, the middle part of the arc-shaped elastic sheet 6 is bent downward. The arc-shaped elastic sheet 6 will support the abutting ring gasket 51, blocking the pressure of the concrete on the abutting ring gasket 51 and preventing the abutting ring gasket 51 from further bending, resulting in a decrease in the sealing effect.

[0055] The sealing ring gasket 5 seals the insertion slot 22. When the second stirring rod 4 is in the descending state, the arc-shaped elastic piece 6 is in an upwardly bent state, that is, the end of the abutting ring gasket 51 is inclined downward at this time. When the second stirring rod 4 rises, the second stirring rod 4 acts on the friction portion 511, driving the bending state of the arc-shaped elastic piece 6 to gradually change, that is, the middle of the arc-shaped elastic piece 6 gradually bends downward, and the end of the abutting ring gasket 51 is inclined upward at this time. In practice, if the end of the abutting ring gasket 51 is always in a downwardly inclined state, when the second stirring rod 4 rises, it will cause a tendency for the end of the abutting ring gasket 51 to move upward, that is, the abutting ring gasket 51 has a tendency to gradually transition to a straightened state. During this process, the normal pressure of the abutting ring gasket 51 on the second stirring rod 4 will increase, resulting in an increase in the frictional force between the second stirring rod 4 and the abutting ring gasket 51. In this application, the end of the abutting ring gasket 51 can finally bend upward. After bending upward, the normal pressure of the abutting ring gasket 51 on the second stirring rod 4 will become smaller again, facilitating the smooth rise of the second stirring rod 4. That is, in this application, due to the change in the bending state of the abutting ring gasket 51, during the change process, the frictional force will only increase instantaneously and will not have a great impact on the rise of the second stirring rod 4, thereby ensuring the smoothness of the rise of the second stirring rod 4; and when the second stirring rod 4 rises, the concrete will also impede the second stirring blade 41, that is, it will impede the rise of the second stirring rod 4. Therefore, the change in the bending state of the abutting ring gasket 51 will not generate a large frictional force on the second stirring rod 4 here, which can reduce the load when the second stirring rod 4 rises and improve the service life. Similarly, when descending, the abutting ring gasket 51 gradually bends upward, that is, its end is inclined downward, preventing an increase in the load when the second stirring rod 4 descends and helping to improve the service life.

[0056] The design of the arc-shaped elastic piece 6 enables the abutting ring gasket 51 to adapt to the lifting movement of the second stirring rod 4, preventing the additional increase in frictional force and ensuring the smooth sliding of the second stirring rod 4. The abutting ring gasket 51 realizes the conversion of the bending state under the action of the second stirring rod 4, further ensuring the sealing effect and the smoothness of the operation. The principle of the arc-shaped elastic piece 6 to maintain the bending state is the same as that of a hairpin, which can be bent bidirectionally and maintain the bending state.

[0057] The implementation principle of the concrete premixing device in this application embodiment is as follows: When mixing concrete, the second stirring rod 4 rotates synchronously with the first stirring rod 2 to stir the conical discharging portion 14 to ensure the effect of mixing and stirring; after the stirring is completed, discharging is carried out. During discharging, the second stirring rod 4 rises and does not block the conical discharging portion 14, which helps to ensure the discharging effect; the first stirring rod 2 and the second stirring rod 4 are sealed by the sealing ring gasket 5. Among them, the abutting ring gasket 51 can realize the conversion of the bending state under the action of the second stirring rod 4, further ensuring the sealing effect and the smoothness of the operation.

[0058] Example 2

[0059] Referring to Figure 6 , the difference between this embodiment and Embodiment 1 is that an abutting ring groove 7 is formed on the second stirring rod 4, a plugging rod 71 is fixedly connected to the top wall of the abutting ring groove 7, a plugging hole 512 is formed on the upper side of the abutting ring gasket 51, the orifice of the plugging hole 512 is in a flared shape, the plugging rod 71 is obliquely arranged, and is inclined away from the axis of the second stirring rod 4 from top to bottom.

[0060] When the second stirring rod 4 is in a descending state, the end of the abutting ring gasket 51 is located in the abutting ring groove 7, and the plugging rod 71 is in plugging fit with the plugging hole 512 to fix and position the abutting ring gasket 51. Prevent concrete from entering the plugging groove 22 and generating pressure acting on the abutting ring gasket 51, resulting in further bending of the abutting ring gasket 51 and a decrease in the sealing effect, that is, cooperating with the arc-shaped elastic piece 6 can further improve the reliability of the seal.

[0061] When the second stirring rod 4 gradually descends, the bending state of the abutting ring gasket 51 gradually changes, and the abutting ring gasket 51 abuts against the outer wall of the second stirring rod 4 with a large bending degree. When the abutting ring gasket 51 enters the abutting ring groove 7, the bending state of the abutting ring gasket 51 is released, that is, the bending state becomes smaller. During the change of the bending state, the plugging rod 71 will abut against the upper surface of the abutting ring gasket 51 and gradually enter the plugging hole 512 when the bending state of the abutting ring gasket 51 changes.

[0062] Example 3

[0063] Referring to Figure 7 , the difference between this embodiment and Embodiment 2 is that a plurality of abutting ring gaskets 51 are provided, which are arranged at intervals along the vertical direction on the inner side of the sealing ring gasket 5. The number of the abutting ring grooves 7 is the same as that of the abutting ring gaskets 51 and corresponds one by one. Plugging rods 71 are arranged in all the abutting ring grooves 7, and the plugging rods 71 in all the abutting ring grooves 7 are arranged in a staggered manner in the vertical direction. The plugging holes 512 on the abutting ring gaskets 51 correspond to the positions of the corresponding plugging rods 71.

[0064] A plurality of abutting ring gaskets 51 abut against the second stirring rod 4, which helps to further improve the sealing performance between the second stirring rod 4 and the first stirring rod 2 and is applicable to large-scale stirring devices with large internal pressure; arranging all the plugging rods 71 in a staggered manner in the vertical direction can ensure the smooth plugging of the corresponding abutting ring gaskets 51 and the corresponding plugging rods 71.

[0065] Example 4

[0066] Referring to Figure 8The difference between this embodiment and embodiment 1 is that the gap between the plug-in groove 22 and the second stirring rod 4 is larger, the sealing member is configured as a sealing diaphragm 8, the sealing diaphragm 8 is made of rubber material, preferably polyurethane rubber, the sealing diaphragm 8 is in the shape of a truncated cone with a larger upper portion and a smaller lower portion, the upper end of the sealing diaphragm 8 is connected to the bottom of the first stirring rod 2, a connecting block 43 is fixedly connected to the second stirring rod 4, the lower end of the sealing diaphragm 8 is fixedly connected to the connecting block 43, and the size of the plug-in groove 22 is sufficient for the connecting block 43 to enter.

[0067] Reference Figure 8 , Figure 9 and Figure 10 In practice, a first annular groove 26 is formed at the bottom of the first stirring rod 2, and the upper end of the sealing diaphragm 8 is inserted into the first annular groove 26, and then the upper end of the sealing diaphragm 8 is fixed by passing a bolt through the upper end of the sealing diaphragm 8. The connecting block 43 is annular, and a second annular groove 431 is formed at the lower inner side of the connecting block 43, and the lower end of the sealing diaphragm 8 is inserted into the second annular groove 431, and the bolt passes through the connecting block 43 and the sealing diaphragm 8 in sequence to fix the lower end of the sealing diaphragm 8.

[0068] In the initial state, sealing is performed by the sealing diaphragm 8, and the sealing diaphragm 8 is not located in the plug-in groove 22, thereby ensuring that the lifting and sliding movement between the second stirring rod 4 and the first stirring rod 2 is smoother; if the seal is directly arranged in the plug-in groove 22, the friction between the second stirring rod 4 and the first stirring rod 2 will be relatively large, and the concrete will also produce resistance to the rise of the second stirring rod 4, thereby causing the load of the second stirring rod 4 to rise to be relatively large, which will eventually reduce the service life of the equipment.

[0069] The lower side of the first stirring rod 2 is hinged with an abutting rod 9 through a torsion spring, and the abutting rod 9 is located in the sealing diaphragm 8. There are multiple abutting rods 9 arranged in a circular array along the bottom wall of the first stirring rod 2. In the initial state, the abutting rod 9 is tilted and tilted toward the axis of the second stirring rod 4. The torsion spring causes the abutting rod 9 to rotate away from the second stirring rod 4. A smooth portion 91 is formed at the end of the abutting rod 9. An inclined guide portion 432 is formed on the upper side of the connecting block 43.

[0070] During the mixing operation, the concrete exerts pressure on the sealing diaphragm 8, and the sealing diaphragm 8 is retracted toward the second stirring rod 4 and is in a tensioned state. Figure 11 When the second stirring rod 4 rises, the sealing diaphragm 8 will relax, but under the concrete pressure, the sealing diaphragm 8 will further move toward the second stirring rod 4 until the abutting rod 9 is driven to rotate, and the abutting rod 9 gradually abuts against the second stirring rod 4; refer to Figure 12 and Figure 13, when the abutting rod 9 moves to the inclined guiding portion 432, the end of the abutting rod 9 gradually moves below the connecting block 43 along the inclined guiding portion 432. At this time, there is a redundant portion in the lower side part of the connecting block 43 where the sealing diaphragm 8 is located. When the abutting rod 9 moves below the connecting block 43, there will be no large frictional force between the abutting rod 9 and the sealing diaphragm 8, and it can quickly abut against the second stirring rod 4 along with the concrete pressure. When the second stirring rod 4 rises, the sealing diaphragm 8 will also gradually move upward. When the sealing diaphragm 8 moves upward, it will generate a frictional force with the abutting rod 9, giving the abutting rod 9 a force to tightly adhere to the second stirring rod 4. In addition, under the pressure of the concrete, a force that causes the abutting rod 9 to rotate in the direction close to the second stirring rod 4 is also generated, which helps to prevent the abutting rod 9 from resetting under the action of the torsion spring. By abutting the abutting rod 9 against the outer wall of the second stirring rod 4, when the second stirring rod 4 rises, the concrete around it can be blocked, preventing the concrete from adhering to the periphery of the second stirring rod 4 and moving to the insertion slot 22 along with it. If particles of a certain size enter the insertion slot 22, it will cause blockage, greatly affecting the lifting and sliding of the second stirring rod 4 and the first stirring rod 2.

[0071] Through the setting of the sealing diaphragm 8, there is a clearance fit between the second stirring rod 4 and the insertion slot 22, that is, there is only the resistance of the concrete. And because the sealing diaphragm 8 can block the concrete to a certain extent, that is, the concrete is not completely filled around the second stirring rod 4, it can also reduce the resistance of the concrete to the second stirring rod 4, thereby ensuring the smooth rise of the second stirring rod 4, greatly reducing the load during the rise, and improving the service life of the second stirring rod 4 and the driving cylinder 27.

[0072] In practice, after the abutting rod 9 disengages from the inclined guiding portion 432, the abutting rod 9 does not directly abut against the outer wall of the second stirring rod 4. Under the abutment of the outer peripheral side of the connecting block 43, the abutting rod 9 does not abut against the second stirring rod 4 temporarily until it disengages from the connecting block 43, and then the abutting rod 9 will abut against the second stirring rod 4.

[0073] The embodiment of the present application also discloses a concrete premixing process, which uses the above-mentioned premixing device and includes the following steps:

[0074] S1: Put raw materials into the cylinder 1;

[0075] S2: The first stirring rod 2 and the second stirring rod 4 rotate synchronously for mixing and stirring;

[0076] S3: After the stirring is completed, open the discharge port 12 to discharge the material;

[0077] In step S3, while opening the discharge port 12 to discharge the material, the second stirring rod 4 rises.

[0078] The above are all preferred embodiments of this application, and the protection scope of this application is not limited thereby. Therefore, all equivalent changes made according to the structure, shape, and principle of this application shall be covered within the protection scope of this application.

Claims

1. A ready-mixed concrete device, characterized in that: It includes a cylinder body (1), a first stirring rod (2), a first stirring blade (21), a driving motor (3), a feed inlet (11), a discharge outlet (12), a second stirring rod (4) and a second stirring blade (41); the first stirring rod (2) is rotatably arranged in the cylinder body (1), the first stirring blade (21) is arranged on the first stirring rod (2), the driving motor (3) is arranged on the cylinder body (1) and is used to drive the first stirring rod (2) to rotate, the feed inlet (11) is opened on the top wall of the cylinder body (1), a conical discharging part (14) is formed on the lower side of the cylinder body (1), the discharge outlet (12) is opened on the lower side of the conical discharging part (14), the second stirring rod (4) is located at the conical discharging part (14) and is arranged to be lifted and lowered at the lower end of the first stirring rod (2), the second stirring rod (4) rotates coaxially with the first stirring rod (2), and the second stirring blade (41) is arranged on the second stirring rod (4); A plugging slot (22) is opened in the first stirring rod (2), the second stirring rod (4) is plugged and slidably matched with the plugging slot (22), a limiting slot (23) is further opened on the inner wall of the first stirring rod (2), a limiting block (42) slidably matched with the limiting slot (23) is formed on the circumferential side of the second stirring rod (4), a driving cylinder (27) is installed in the first stirring rod (2), the driving cylinder (27) is arranged vertically downward, and the end of the piston rod is connected to the upper end of the second stirring rod (4), and a sealing member for sealing the plugging slot (22) is arranged on the first stirring rod (2); The seal is set as a sealing diaphragm (8), the sealing diaphragm (8) is in the shape of a frustum of a cone with a larger upper part and a smaller lower part, the upper end of the sealing diaphragm (8) is connected to the lower end of the first stirring rod (2), and the lower end of the sealing diaphragm (8) is connected to the second stirring rod (4); A butting rod (9) is hinged to the lower side of the first stirring rod (2) through a torsion spring, and the butting rod (9) is located inside the sealing diaphragm (8). In the initial state, the butting rod (9) is arranged obliquely and obliquely towards the axis direction of the second stirring rod (4), and a smooth part (91) is formed at the end of the butting rod (9); a connecting block (43) is arranged on the second stirring rod (4), the lower end of the sealing diaphragm (8) is connected to the lower side of the connecting block (43), and an inclined guiding part (432) is formed on the upper side of the connecting block (43); when the second stirring rod (4) rises, under the action of the sealing diaphragm (8), the smooth part (91) of the butting rod (9) abuts against the second stirring rod (4), and when the second stirring rod (4) rises, under the action of the inclined guiding part (432), the butting rod (9) will gradually move to the lower side of the connecting block (43).

2. The ready-mixed concrete device according to claim 1, characterized in that: The sealing diaphragm (8) is made of rubber material.

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