A mixer for concrete production

Abstract

The invention discloses a mixer for concrete production, comprising a mixer shell and a support frame, a feed frame is arranged on the top of the mixer shell, an arc support plate is arranged between two support frames, the mixer shell is overlapped on the arc support plate, a filter screen is slidably inserted on the feed frame, a discharge port is arranged on one side of the bottom of the mixer shell, a drive motor is arranged in the middle of the other end of the mixer shell, a transmission shaft is arranged at the output end of the drive motor, connecting bars are arranged between the support frames, and a first arc magnetic block is arranged on one side of the mixer shell; the invention generates a composite motion by combining the rotation of the mixing blades with the swinging rotation of the mixer shell, so as to more effectively stir the concrete, accelerate the mixing speed, improve the uniformity of the concrete, and reduce the dead angle; at the same time, the coordination between the gap pushing and the up and down movement of the filter screen, the automatic feeding and the effective mixing process can shorten the mixing time and improve the production efficiency and quality.

Description

Technical Field

[0001] The invention relates to the technical field of mixers, in particular to a mixer used for concrete production. Background Art

[0002] Concrete mixer is a machine that mixes cement, sand and gravel aggregate and water to make concrete mixture. It is mainly composed of mixing drum, feeding and unloading mechanism, water supply system, prime mover, transmission mechanism, frame and supporting device. According to the working nature, it can be divided into intermittent (batch) and continuous type; according to the mixing principle, it can be divided into self-falling type and forced type; according to the installation method, it can be divided into fixed type and mobile type; according to the discharging method, it can be divided into tilting type and non-tilting type; according to the mixing drum structure, it can be divided into pear type, drum type, double cone type, disc vertical shaft type and round groove horizontal shaft type.

[0003] In the concrete production process, the mixer plays a vital role, and its performance directly affects the quality of concrete. The mixer mainly completes the uniform mixing of various components of concrete through mechanical mixing. During the operation of the mixer, there is a problem of excessive machine load caused by excessive one-time feeding, which not only affects the service life of the mixer, but also may affect the quality of concrete due to uneven mixing. In addition, foreign matter inside the mixing drum is easy to conflict with the drum wall or blades, increasing maintenance costs and reducing production efficiency. Summary of the invention

[0004] The object of the present invention is to provide a mixer for concrete production to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a mixer for concrete production, comprising a mixer shell and a support frame, a feed frame is arranged on the top of the mixer shell, an arc support plate is arranged between two support frames, the mixer shell is overlapped on the arc support plate, a filter screen is slidably inserted on the feed frame, a discharge port is arranged on one side of the bottom of the mixer shell, a drive motor is arranged in the middle of the other end of the mixer shell, a transmission shaft is arranged on the output end of the drive motor, connecting bars are arranged between the support frames, a first arc magnetic block is arranged on one side of the mixer shell, a water inlet pipe is slidably inserted on the connecting bar, a mixing component for convenient flushing is arranged inside the mixer shell, and a control component for convenient pushing and up and down movement is arranged between the feed frame and the mixer shell.

[0006] Preferably, limit bars are provided on both the upper and lower sides of one side of the support frame, and the two limit bars form a barrier to the first arc magnetic attraction block.

[0007] Preferably, the stirring assembly includes a sleeve, which is fixedly sleeved on the transmission shaft, and stirring blades are provided on both sides of the transmission shaft. There are two groups of stirring blades, and the two groups of stirring blades are staggered and distributed along the axial direction of the transmission shaft. A circulation cavity is opened on the transmission shaft, the sleeve and the stirring blades, and the end of the water inlet pipe is movably inserted in the opening of the circulation cavity.

[0008] Preferably, a connecting rod is provided at one end of the two groups of stirring blades, and a second arc magnetic block is provided at the end of the connecting rod. The second arc magnetic block and the first arc magnetic block attract each other, and the second arc magnetic block is arranged to fit the inner wall of the mixer housing.

[0009] Preferably, a nozzle is provided on one side of the stirring blade, a circular groove is opened at the port of the nozzle, the diameter of the circular groove is larger than the diameter of the port of the nozzle, a support rod is provided on the inner side of the nozzle, a cylinder is provided at the ends of the plurality of support rods, a mounting plate is provided at the end of the cylinder, and a round block is slidably inserted on the cylinder.

[0010] Preferably, a sleeve rod is provided at the end of the round block, a sealing cover is provided at the end of the sleeve rod passing through the mounting plate, an annular groove is provided on the nozzle on the circular groove, the end edge of the sealing cover matches the annular groove, and a support spring is sleeved on the sleeve rod.

[0011] Preferably, the control component includes a fixed frame, which is fixedly connected to the mixer housing, and abutment bars are slidably inserted on the fixed frame, and a guide rod is slidably inserted on the filter screen. The guide rod is a "T"-shaped rod structure, and a limiting cylinder is fixedly sleeved on the guide rod. A support rod is provided on the inner side of the feed frame, and a fixed cylinder is provided on the inner side of the feed frame.

[0012] Preferably, the bottom end of the abutment block is an inclined surface structure and abuts against one end of the stirring blade, an airbag block is arranged between the top end of the abutment block and the fixed frame, and a first connecting tube and a second connecting tube are respectively arranged on one side of the end of the airbag block.

[0013] Preferably, a second airbag tube is slidably inserted on the limiting tube, a pulling tube is provided at the end of the second airbag tube, the pulling tube is fixedly connected to the filter, a guide cone is provided at the end of the pulling tube, a return spring is provided on the pulling tube inside the limiting tube, the support rod and the guide rod are fixedly connected, and the end of the first connecting tube passes through the support rod and the guide rod and is fixedly connected to the second airbag tube.

[0014] Preferably, a pulling rod is slidably inserted on the fixed cylinder, a push plate is provided at the end of the pulling rod, the push plate has a bent structure, and the bottom is fitted with the inner surface of the feed frame, a first airbag tube is provided between the pulling rod and the fixed cylinder, an abutment spring is sleeved on the pulling rod, and one end of the second connecting tube passes through the feed frame and is fixedly connected between the fixed cylinder and the first airbag tube.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. The present invention generates a composite motion by combining the rotation of the mixing blades with the swinging rotation of the mixer shell, which can more effectively stir the concrete, speed up the mixing speed, improve the uniformity of the concrete, and reduce dead angles. At the same time, the coordination between the gap pushing and the up and down movement of the filter screen, the automated feeding and the effective mixing process can shorten the mixing time and improve production efficiency and quality.

[0017] 2. The nozzle and cover structure provided in the present invention can realize timely addition of an appropriate amount of water during the mixing process to keep the concrete mixture uniformly moist, thereby ensuring the quality of the concrete. The feedback effect of the support spring allows the end of the cover to be inserted into the annular groove, thereby sealing the port of the nozzle and preventing concrete from entering the flow cavity.

[0018] 3. The present invention can effectively intercept aggregates or impurities exceeding a specific size through the setting of control components and filter screens, prevent damage to the machinery, and ensure that the quality of concrete is not affected by large particles. The push plate and pull rod structure realize mechanical pushing of materials, reduce damage to the internal components of the mixer shell caused by direct impact, reduce equipment wear, and extend the service life of the equipment. The air bag block and spring structure are used to realize the up and down movement of the filter screen and control components, improve the degree of automation of the equipment, reduce manual intervention, and improve work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic structural diagram of a mixer for concrete production according to the present invention.

[0020] Figure 2 It is a structural schematic diagram of the other side of the mixer of the present invention.

[0021] Figure 3 It is a schematic diagram of the structure inside the mixer housing of the present invention.

[0022] Figure 4 It is a cross-sectional view of the mixer housing of the present invention.

[0023] Figure 5 It is a schematic structural diagram of the stirring assembly of the present invention.

[0024] Figure 6 For the present invention Figure 5 Schematic diagram of the structure enlarged at point A in the middle.

[0025] Figure 7 It is a cross-sectional view of the fixed frame of the present invention.

[0026] Figure 8 For the present invention Figure 5 Schematic diagram of the enlarged structure at point B.

[0027] Fig. 9 It is a top view of the feeding frame of the present invention.

[0028] Fig.10 It is a structural schematic diagram of the bottom of the filter screen of the present invention.

[0029] Fig.11 For the present invention Fig.10 Schematic diagram of the enlarged structure at point C in the middle.

[0030] Fig.12 It is a cross-sectional view of the fixing tube of the present invention.

[0031] Fig.13 For the present invention Fig.12 Schematic diagram of the structure enlarged at point D in the middle.

[0032] In the figure: mixer housing 1; first arc magnetic block 11; connecting bar 21; limiting bar 22; support frame 2; arc support plate 3; drive motor 4; transmission shaft 41; circulation cavity 411; sleeve 42; mixing blade 43; nozzle 44; circular groove 441; support rod 442; cylinder 443; round block 444; support spring 445; mounting plate 446; sleeve rod 447; cover 448; annular groove 449; connection Rod 45; second arc magnetic block 46; feed frame 5; fixed cylinder 51; pulling rod 52; push plate 53; first airbag cylinder 54; abutment spring 55; discharge port 6; water inlet pipe 7; fixed frame 8; abutment bar 81; airbag block 82; first connecting pipe 83; second connecting pipe 84; filter screen 9; support rod 91; guide rod 92; limiting cylinder 93; pulling cylinder 94; second airbag cylinder 95; return spring 96; guide cone 97. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] See also Figure 1It is a structural schematic diagram of a mixer for concrete production of the present invention. The present invention provides a technical solution: a mixer for concrete production, comprising a mixer shell 1 and a support frame 2. The mixer shell 1 is a main body of the mixer and is used to contain concrete and other materials for mixing. A feed frame 5 is fixedly connected to the top of the mixer shell 1. An arc support plate 3 is fixedly connected between two support frames 2. The mixer shell 1 is overlapped on the arc support plate 3. The arc support plate 3 supports the mixer shell 1. A drive motor 4 is fixedly installed in the middle of the other end of the mixer shell 1.

[0035] Figure 2 This is a structural schematic diagram of the other side of the mixer of the present invention. The output end of the driving motor 4 is fixedly connected to the transmission shaft 41, and one side of the bottom of the mixer housing 1 is fixedly connected to a discharge port 6. The discharge port 6 is set to discharge the mixed concrete through the discharge port 6. A connecting bar 21 is fixedly connected between the support frames 2, one end of the transmission shaft 41 is rotatably connected to the connecting bar 21, and one side of the mixer housing 1 is fixedly connected to a first arc magnetic block 11.

[0036] A water inlet pipe 7 is slidably inserted on the connecting bar 21, and the end of the water inlet pipe 7 is connected to a water tank and a delivery pump, which is shown in the accompanying drawings and is a common device in the prior art. The water tank is a container for storing water to provide the required amount of water for concrete mixing, and the delivery pump connected to the water tank is used to push water from the water tank to the inside of the mixer.

[0037] Figure 4 This is a cross-sectional view of the mixer housing of the present invention. Limiting bars 22 are fixedly connected to the upper and lower sides of one side of the support frame 2. The two limiting bars 22 form a barrier to the first arc magnetic block 11. The limiting bars 22 on the upper and lower sides are used to limit the movement range of the mixer housing 1 to prevent excessive movement.

[0038] Fig. 9 It is a top view of the feeding frame of the present invention, Figure 3 Schematic diagram of the structure of the interior of the mixer housing of the present invention, a filter screen 9 is slidably inserted on the feed frame 5, a stirring assembly for flushing is arranged inside the mixer housing 1, the stirring assembly includes a sleeve 42, the sleeve 42 is fixedly sleeved on the transmission shaft 41, both sides of the transmission shaft 41 are fixedly connected with stirring blades 43, two groups of stirring blades 43 are arranged, the two groups of stirring blades 43 are staggered along the axial direction of the transmission shaft 41, and one end of the two groups of stirring blades 43 is provided with a connecting rod 45.

[0039] After the driving motor 4 is started, the power is transmitted to the stirring blades 43 through the transmission shaft 41, causing them to rotate in the mixer housing 1. The sleeve 42 is fixed on the transmission shaft 41 to provide support for the stirring blades 43. The stirring blades 43 are divided into two groups and are arranged axially staggered along the transmission shaft 41, which helps to achieve more uniform and effective stirring.

[0040] Figure 5 This is a schematic diagram of the structure of the stirring assembly of the present invention. The end of the connecting rod 45 is fixedly connected to the second arc magnetic block 46. The second arc magnetic block 46 and the first arc magnetic block 11 attract each other. The second arc magnetic block 46 is arranged to fit the inner wall of the mixer housing 1. A circulation cavity 411 is provided on the transmission shaft 41, the sleeve 42 and the stirring blade 43. The end of the water inlet pipe 7 is movably inserted in the opening of the circulation cavity 411.

[0041] When the mixing blade 43 rotates, it drives the second arc magnetic block 46 to rotate, and the first arc magnetic block 11 and the second arc magnetic block 46 attract each other, thereby driving the first arc magnetic block 11 to rotate between the upper and lower limit bars 22, so that the mixer shell 1 rotates in a swinging manner. The rotation of the mixing blade 43 is the basic function of the mixer, which mixes the concrete material in the mixer shell 1. When the shell 1 itself is also driven to rotate in a swinging manner, the composite motion stirs the concrete more effectively, speeds up the mixing speed, and improves the mixing uniformity. Materials in certain areas are not easily stirred. The swinging rotation of the shell 1 can reduce dead angles, which is conducive to uniform mixing of all materials.

[0042] Figure 5 is a schematic diagram of the structure of the stirring assembly of the present invention, Figure 6 For the present invention Figure 5 In the enlarged structural schematic diagram at point A, a nozzle 44 is fixedly connected to one side of the stirring blade 43, and the nozzle 44 is connected to the flow chamber 411. A circular groove 441 is provided at the port of the nozzle 44, and the diameter of the circular groove 441 is larger than the diameter of the port of the nozzle 44. A support rod 442 is fixedly connected to the inner side of the nozzle 44, and a cylinder 443 is fixedly connected to the ends of multiple support rods 442. A mounting plate 446 is fixedly installed on the end of the cylinder 443, and the mounting plate 446 is fixed to the end of the cylinder 443 by bolts. A round block 444 is slidably inserted into the cylinder 443.

[0043] The end of the round block 444 is fixedly connected to a sleeve rod 447, and the end of the sleeve rod 447 passes through the mounting plate 446 and is fixedly connected to a cover 448. The diameter of the cover 448 is smaller than the diameter of the circular groove 441. The cover 448 is used to seal the port of the nozzle 44 to prevent concrete from entering the flow cavity 411. The nozzle 44 is provided with an annular groove 449 on the circular groove 441. The end edge of the cover 448 matches the annular groove 449. A support spring 445 is sleeved on the sleeve rod 447. The model and specification of the support spring 445 can be selected according to actual working conditions.

[0044] The water in the water tank is pushed by the delivery pump, passes through the water inlet pipe 7, and is sprayed into the mixer housing 1 from the circulation cavity 411 and the nozzle 44. During this process, the water pressure impacts the cover 448, so that the end of the cover 448 is away from the annular groove 449, and the water is sprayed out from the gap between the cover 448 and the circular groove 441, so that an appropriate amount of water can be added during the mixing process to ensure uniform wetting of the concrete mixture. At this time, the support spring 445 is compressed by the movement of the round block 444. When water is no longer delivered, due to the elastic force of the support spring 445, the round block 444 is squeezed to move, and then the end of the cover 448 is inserted into the annular groove 449 to achieve the blocking of the port of the nozzle 44.

[0045] Figure 7 is a cross-sectional view of a fixed frame of the present invention, Figure 8 For the present invention Figure 5 The enlarged structural diagram at B in the middle, Fig. 9 This is a top view of the feed frame of the present invention. A control component that is convenient for pushing materials and moving up and down is arranged between the feed frame 5 and the mixer housing 1. The control component includes a fixed frame 8, which is fixedly connected to the mixer housing 1. An abutment bar 81 is slidably inserted on the fixed frame 8. The bottom end of the abutment bar 81 is an inclined surface structure and abuts against one end of the mixing blade 43. An airbag block 82 is bonded between the top of the abutment bar 81 and the fixed frame 8. The end side of the airbag block 82 is respectively connected to a first connecting pipe 83 and a second connecting pipe 84.

[0046] When the stirring blade 43 rotates, it pushes the end of the abutting block 81 to move upward, so that the other end of the abutting block 81 squeezes the airbag block 82. The airbag block 82 is compressed, and part of the gas in the airbag block 82 is transmitted through the first connecting pipe 83, and the other part is transmitted through the second connecting pipe 84.

[0047] Fig.10 It is a structural schematic diagram of the bottom of the filter screen of the present invention, Fig.11 For the present invention Fig.10 The enlarged structural diagram at point C in the middle shows that a guide rod 92 is slidably inserted on the filter 9, and the guide rod 92 is a "T"-shaped rod structure. A limiting cylinder 93 is fixedly sleeved on the guide rod 92, and a second air bag cylinder 95 is slidably inserted on the limiting cylinder 93. A pulling cylinder 94 is bonded to the end of the second air bag cylinder 95, and the pulling cylinder 94 is fixedly connected to the filter 9. A guide cone 97 is fixedly connected to the end of the pulling cylinder 94, and the guide cone 97 is used to guide the falling concrete to prevent the concrete from falling on the limiting cylinder 93.

[0048] A return spring 96 is sleeved on the inner part of the limiting cylinder 93 on the pulling cylinder 94. The elastic force of the return spring 96 can overcome the pressure of the airbag block 82 and the second airbag cylinder 95 in the absence of other external forces. A support rod 91 is fixedly connected to the inner side of the feeding frame 5. The support rod 91 is fixedly connected to the guide rod 92. The end of the first connecting tube 83 passes through the support rod 91 and the guide rod 92 and is fixedly connected to the second airbag cylinder 95.

[0049] The gas in the airbag block 82 is transmitted to the second airbag tube 95 through the first connecting tube 83, causing the second airbag tube 95 to expand. When the second airbag tube 95 expands, it pushes the pulling tube 94 bonded to it to move outward, and the movement of the pulling tube 94 drives the guide cone 97 to move, and then the filter 9 moves upward. When the stirring blade 43 is no longer in contact with the abutting bar 81, the elastic force of the reset spring 96 overcomes the pressure of the airbag block 82 and the second airbag tube 95, and the airbag block 82 and the second airbag tube 95 return to their initial state, the abutting bar 81 is also reset, and the filter 9 moves downward, thereby realizing the up and down movement of the filter 9.

[0050] The filter screen 9 effectively intercepts aggregates or impurities exceeding a certain size and prevents them from entering the mixer housing 1, which helps to protect the machine from damage and ensures that the quality of the concrete will not be affected by large particles. By controlling the up and down movement of the filter screen 9, the speed and amount of materials entering the mixer are adjusted, thereby optimizing the mixing efficiency.

[0051] Fig.12 is a cross-sectional view of the fixing tube of the present invention, Fig.13 For the present invention Fig.12 In the enlarged structural schematic diagram at point D in the middle, a fixed cylinder 51 is fixedly connected to the inner side of the feed frame 5, a pulling rod 52 is slidably inserted on the fixed cylinder 51, a push plate 53 is fixedly connected to the end of the pulling rod 52, the push plate 53 is a bent structure, and the bottom is fitted with the inner surface of the feed frame 5, a first airbag cylinder 54 is bonded between the pulling rod 52 and the fixed cylinder 51, an abutment spring 55 is sleeved on the pulling rod 52, one end of the second connecting tube 84 passes through the feed frame 5 and the fixed cylinder 51 and is fixedly connected with the first airbag cylinder 54, the elastic force of the abutment spring 55 can overcome the pressure of the first airbag cylinder 54 and the airbag block 82.

[0052] The gas in the airbag block 82 is transmitted to the first airbag tube 54 through the second connecting pipe 84, causing the first airbag tube 54 to expand. When the first airbag tube 54 expands, it pushes the pulling rod 52 bonded thereto to move outward. The movement of the pulling rod 52 drives the push plate 53 to move. The push plate 53 pushes the concrete part placed on the feed frame 5 into the feed frame 5, and enters the mixer housing 1 through the feed frame 5. The elastic force of the abutment spring 55 can overcome the pressure of the first airbag tube 54 and the airbag block 82, so that the push plate 53 returns to its initial state. This cycle realizes the gap pushing of the push plate 53. Compared with one-time feeding, this mechanical pushing method reduces the direct impact on the internal components of the mixer housing 1, thereby reducing the wear of the equipment.

[0053] In actual use, concrete is placed on the feed frame 5. After the drive motor 4 is started, the power is transmitted to the mixing blade 43 through the transmission shaft 41, so that it rotates in the mixer housing 1. When the mixing blade 43 rotates, the end of the abutting block 81 is pushed to move upward, so that the other end of the abutting block 81 squeezes the airbag block 82. The airbag block 82 is compressed, and part of the gas in the airbag block 82 is transmitted through the first connecting pipe 83, and the other part is transmitted through the second connecting pipe 84. The gas in the airbag block 82 is transmitted to the first airbag cylinder 54 through the second connecting pipe 84. , causing the first airbag tube 54 to expand. When the first airbag tube 54 expands, it pushes the pulling rod 52 bonded thereto to move outward. The movement of the pulling rod 52 drives the push plate 53 to move. The push plate 53 pushes the concrete part placed on the feed frame 5 into the feed frame 5, and enters the mixer housing 1 through the feed frame 5. The elastic force of the abutment spring 55 can overcome the pressure of the first airbag tube 54 and the airbag block 82, so that the push plate 53 returns to its initial state. This cycle realizes the gap pushing of the push plate 53, and the mixing blade 43 mixes the concrete. When the mixing blade When the mixer housing 1 rotates, the second arc magnetic block 46 is driven to rotate, and the first arc magnetic block 11 and the second arc magnetic block 46 attract each other, thereby driving the first arc magnetic block 11 to rotate between the upper and lower limit bars 22, so that the mixer housing 1 rotates in a swinging manner. The composite motion stirs the concrete more effectively, speeds up the mixing speed, improves the mixing uniformity, and reduces the dead angle. In this process, the gas in the airbag block 82 is transmitted to the second airbag tube 95 through the first connecting pipe 83, causing the second airbag tube 95 to expand. When the stirring blade 43 is no longer in contact with the abutting bar 81, the elastic force of the reset spring 96 overcomes the pressure of the airbag block 82 and the second airbag tube 95, and the airbag block 82 and the second airbag tube 95 return to their initial state. The abutting bar 81 is also reset, and the filter screen 9 moves downward. In this way, the up and down movement of the filter screen 9 is realized. By controlling the up and down movement of the filter screen 9, the speed and amount of material entering the mixer are adjusted, thereby optimizing the mixing efficiency.

[0054] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A mixer for concrete production, comprising a mixer housing (1) and a support frame (2), characterized in that: A feed frame (5) is arranged at the top of the mixer housing (1), a circular arc support plate (3) is arranged between the two support frames (2), the mixer housing (1) is overlapped on the circular arc support plate (3), a filter screen (9) is slidably inserted on the feed frame (5), a discharge port (6) is arranged on one side of the bottom of the mixer housing (1), a drive motor (4) is arranged in the middle of the other end of the mixer housing (1), a transmission shaft (41) is arranged at the output end of the drive motor (4), a connecting bar (21) is arranged between the support frames (2), a first circular arc magnetic block (11) is arranged on one side of the mixer housing (1), a water inlet pipe (7) is slidably inserted on the connecting bar (21), and the mixer A stirring assembly for flushing is arranged inside the housing (1), a control assembly for pushing materials and moving up and down is arranged between the feed frame (5) and the mixer housing (1), the control assembly comprising a fixed frame (8), the fixed frame (8) being fixedly connected to the mixer housing (1), abutting blocks (81) being slidably inserted on the fixed frame (8), a guide rod (92) being slidably inserted on the filter screen (9), the guide rod (92) being a "T"-shaped rod structure, a limiting cylinder (93) being fixedly sleeved on the guide rod (92), a support rod (91) being arranged on the inner side of the feed frame (5), a fixed cylinder (51) being arranged on the inner side of the feed frame (5), the bottom end of the abutting block (81) being The inclined surface structure is abutted against one end of the stirring blade (43); an airbag block (82) is arranged between the top of the abutting strip (81) and the fixed frame (8); a first connecting tube (83) and a second connecting tube (84) are respectively arranged on one side of the end of the airbag block (82); a second airbag tube (95) is slidably inserted on the limiting tube (93); a pulling tube (94) is arranged at the end of the second airbag tube (95); the pulling tube (94) is fixedly connected to the filter screen (9); a guide cone (97) is arranged at the end of the pulling tube (94); a return spring (96) is arranged on the pulling tube (94) inside the limiting tube (93); the support rod (91) and the guide rod (92), the end of the first connecting tube (83) passes through the support rod (91) and the guide rod (92) and is fixedly connected with the second airbag tube (95), a pulling rod (52) is slidably inserted on the fixed tube (51), and a push plate (53) is provided at the end of the pulling rod (52), the push plate (53) is in a bent structure, and the bottom is in contact with the inner surface of the feed frame (5), a first airbag tube (54) is provided between the pulling rod (52) and the fixed tube (51), and an abutment spring (55) is sleeved on the pulling rod (52), and one end of the second connecting tube (84) passes through the feed frame (5) and the fixed tube (51) and is fixedly connected with the first airbag tube (54).

2. A mixer for concrete production according to claim 1, characterized in that: Limiting strips (22) are provided on both the upper and lower sides of one side of the support frame (2), and the two limiting strips (22) form a barrier for the first arc magnetic attraction block (11).

3. A mixer for concrete production according to claim 1, characterized in that: The stirring assembly comprises a sleeve (42), the sleeve (42) being fixedly sleeved on a transmission shaft (41), stirring blades (43) being provided on both sides of the transmission shaft (41), two groups of stirring blades (43) being provided, the two groups of stirring blades (43) being arranged in a staggered manner along the axial direction of the transmission shaft (41), a circulation cavity (411) being provided on the transmission shaft (41), the sleeve (42) and the stirring blades (43), and an end of the water inlet pipe (7) being movably plugged into an opening of the circulation cavity (411).

4. A mixer for concrete production according to claim 3, characterized in that: A connecting rod (45) is provided at one end of the two groups of stirring blades (43); a second arc magnetic block (46) is provided at the end of the connecting rod (45); the second arc magnetic block (46) and the first arc magnetic block (11) attract each other; the second arc magnetic block (46) is arranged to fit the inner wall of the stirring machine housing (1).

5. A mixer for concrete production according to claim 3, characterized in that: A nozzle (44) is provided on one side of the stirring blade (43); a circular groove (441) is provided at the port of the nozzle (44); the diameter of the circular groove (441) is larger than the diameter of the port of the nozzle (44); a support rod (442) is provided on the inner side of the nozzle (44); a cylinder (443) is provided at the end of the plurality of support rods (442); a mounting plate (446) is provided at the end of the cylinder (443); and a round block (444) is slidably inserted into the cylinder (443).

6. A mixer for concrete production according to claim 5, characterized in that: A sleeve rod (447) is provided at the end of the round block (444), and a cover (448) is provided at the end of the sleeve rod (447) passing through the mounting plate (446). An annular groove (449) is provided on the nozzle (44) on the circular groove (441), and the end edge of the cover (448) matches the annular groove (449). A support spring (445) is sleeved on the sleeve rod (447).

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