Sand discharge gate for sand mixer and sand mixer

Abstract

The utility model relates to sand mixer manufacturing technical field discloses a kind of sand discharge door and sand mixer for sand mixer.It is the sand discharge door for sand mixer including sand discharge door body and door body opening and closing unit, sand discharge door body cover is located at the sand outlet of sand mixer body side wall, and the top of sand discharge door body is rotatably connected with sand mixer body, door body opening and closing unit is installed on sand mixer body, and door body opening and closing unit is connected with sand discharge door body, door body opening and closing unit is used to drive sand discharge door body to overturn upwards or downwards, to realize the opening or closing of sand outlet.Downwards overturning closing can utilize door body self gravity to assist closing, improve sealing reliability, reduce sand leakage, upwards overturning opening can make sand discharge door body away from sand outlet, improve sand discharge door space utilization, sand discharge efficiency and reduce sand discharge door sand accumulation.

Description

Technical Field

[0001] This utility model relates to the field of sand mixer manufacturing technology, and in particular to a sand discharge gate for a sand mixer and a sand mixer. Background Technology

[0002] Sand mixers are key equipment in foundry sand processing and molding sand mixing. They can uniformly mix foundry sand, binders, additives, water, etc., to create molding sand or core sand with specific properties. Through crushing, grinding, and mixing, the binder effectively coats the surface of the sand particles, playing a crucial role in controlling molding sand quality and reducing costs. They are widely used in foundries and industries such as glass and ceramics. In the production application of sand mixers, the sand discharge gate, as a key component controlling sand discharge, directly affects the working efficiency, space adaptability, and reliability of the sand mixer.

[0003] Currently, some sand discharge doors used in sand mixers have dust covers installed outside the sand collection bags and use a left-right flip-opening method. This design requires a large amount of lateral space, and in situations where the surrounding equipment is compactly arranged, it is very easy to interfere with it, limiting the installation flexibility of the equipment. Other sand discharge doors place the sand outlet at the bottom of the sand mixer, which improves the lateral space occupied, but sand tends to remain at the bottom under gravity, resulting in incomplete sand discharge. Furthermore, the residual sand is difficult to clean, and long-term use can also affect the sealing performance of the sand discharge door, causing sand leakage.

[0004] Therefore, there is an urgent need for a sand discharge gate for sand mixers that can solve the problems of low space utilization, low sand discharge efficiency and poor sealing performance of existing sand discharge gates used in sand mixers. Utility Model Content

[0005] The purpose of this utility model is to provide a sand discharge door for a sand mixer, which can solve the problems of low space utilization, low sand discharge efficiency and poor sealing performance of existing sand discharge doors for sand mixers.

[0006] Based on the above concept, the technical solution adopted by this utility model is as follows:

[0007] A sand discharge gate for a sand mixer, used to open or close the sand outlet on the side wall of the sand mixer body, the sand discharge gate for the sand mixer comprising:

[0008] The sand discharge gate body is covered at the sand outlet on the side wall of the sand mixer body, and the top of the sand discharge gate body is rotatably connected to the sand mixer body.

[0009] The door opening and closing unit is installed on the main body of the sand mixer and is connected to the sand discharge door body. The door opening and closing unit is used to drive the sand discharge door body to flip upward or downward to realize the opening or closing of the sand outlet.

[0010] As an optional solution for the sand discharge gate used in the sand mixer, the gate opening and closing unit includes:

[0011] The first support is mounted on the body of the sand mixer;

[0012] A first driving member is disposed on the first support;

[0013] The linkage component is rotatably connected to the first support, and the output end of the first drive component is rotatably connected to the linkage component. The linkage component is used to drive the sand discharge gate body to rotate upward or downward around its rotational connection point with the sand mixer body, so as to cooperate with the first drive component to complete the opening or closing operation of the sand outlet.

[0014] As an optional solution for the sand discharge gate used in the sand mixer, the linkage assembly includes:

[0015] A two-way linkage, one end of which is rotatably connected to the sand-discharging gate body;

[0016] A three-way link, the first end of which is rotatably connected to the opposite end of the two-way link, the second end of which is rotatably connected to the first support, and the third end of which is rotatably connected to the output end of the first drive member.

[0017] As an optional solution for the sand discharge gate used in the sand mixer, the gate opening and closing unit also includes:

[0018] A rotating plate, the sand discharge door is mounted on the rotating plate, and the linkage assembly is rotatably connected to the rotating plate;

[0019] The rotating shaft passes through both the top of the rotating plate and the body of the sand mixer.

[0020] As an optional solution for the sand discharge gate used in the sand mixer, the sand discharge gate body includes:

[0021] A first support plate is connected to the door opening and closing unit;

[0022] A wear-resistant plate is fixedly connected to the first support plate, and the wear-resistant plate is close to the sand outlet relative to the first support plate.

[0023] As an alternative to the sand discharge gate for the sand mixer, the sand discharge gate body also includes a first sealing element, which is disposed on the outer periphery of the structure formed by the first support plate and the wear-resistant plate.

[0024] As an optional solution for the sand discharge gate of the sand mixer, the sand discharge gate of the sand mixer also includes a residual sand cleaning unit, which is installed on the body of the sand mixer and is used to clean the residual sand at the sand outlet.

[0025] As an optional feature of the sand discharge gate for the sand mixer, the residual sand cleaning unit includes:

[0026] The nozzle is mounted on the body of the sand mixer and is positioned above the sand outlet with its opening facing downwards to be aligned with the sand outlet or the residual sand accumulation area.

[0027] The nozzle is connected to the nozzle and is also connected to an external air supply device.

[0028] As an optional solution for the sand discharge gate for the sand mixer, the sand discharge gate for the sand mixer also includes a sand baffle, which is disposed on the side wall of the sand mixer body and on the sand-facing side of the sand outlet.

[0029] A sand mixer includes a main body and a sand discharge gate for the sand mixer, the sand discharge gate being installed on the main body of the sand mixer.

[0030] The beneficial effects of this utility model are as follows:

[0031] This utility model proposes a sand discharge gate for a sand mixer. The sand discharge gate body is fitted over the sand outlet on the side wall of the sand mixer body, and the top of the sand discharge gate body is rotatably connected to the sand mixer body. A gate opening and closing unit is installed on the sand mixer body and connected to the sand discharge gate body. The gate opening and closing unit is used to drive the sand discharge gate body to flip upward or downward to open or close the sand outlet. When flipped downward to close, the gate body can use its own weight to assist in closing, improving sealing reliability and reducing sand leakage. When flipped upward to open, the sand discharge gate body can be moved away from the sand outlet, improving the space utilization of the sand discharge gate, sand discharge efficiency, and reducing sand accumulation in the sand discharge gate. Attached Figure Description

[0032] Figure 1 This is a first schematic diagram of a sand discharge gate for a sand mixer provided in an embodiment of the present invention;

[0033] Figure 2 This is a second schematic diagram of a sand discharge gate for a sand mixer provided in an embodiment of the present invention;

[0034] Figure 3 This is a third schematic diagram of a sand discharge gate for a sand mixer provided in an embodiment of this utility model.

[0035] In the picture:

[0036] 1. Sand unloading door body; 11. First support plate; 12. Wear-resistant plate;

[0037] 2. Door opening and closing unit; 21. First support; 22. First driving component; 23. Linkage assembly; 231. Two-way linkage; 232. Three-way linkage; 24. Rotating plate; 25. Rotating shaft;

[0038] 3. Residual sand cleaning unit;

[0039] 4. Sand guards. Detailed Implementation

[0040] To make the technical problem solved by this utility model, the technical solution adopted, and the technical effect achieved clearer, the technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely for explaining this utility model and not for limiting it. Furthermore, it should be noted that, for ease of description, only the parts related to this utility model are shown in the accompanying drawings, not all of them.

[0041] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0042] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0043] In the description of this embodiment, the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, 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 utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0044] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0045] This embodiment discloses a sand discharge gate for a sand mixer, used to open or close the sand outlet on the side wall of the sand mixer body, such as... Figures 1-3 As shown, in this embodiment, the sand discharge door for the sand mixer includes a sand discharge door body 1 and a door opening and closing unit 2. The sand discharge door body 1 is installed over the sand outlet on the side wall of the sand mixer body, and the top of the sand discharge door body 1 is rotatably connected to the sand mixer body. The door opening and closing unit 2 is installed on the sand mixer body and is connected to the sand discharge door body 1. The door opening and closing unit 2 is used to drive the sand discharge door body 1 to flip upward or downward to open or close the sand outlet. When flipped upward to open, the door body's own weight can be used to assist in closing, improving sealing reliability. When flipped downward to close, it can better fit the edge of the sand outlet, reducing sand leakage and improving space utilization, sand discharge efficiency, and sealing performance.

[0046] Specifically, such as Figures 1-3 As shown, in this embodiment, the door opening and closing unit 2 includes a first support 21, a first drive component 22, and a linkage component 23. The first support 21 is mounted on the sand mixer body, the first drive component 22 is mounted on the first support 21, and the linkage component 23 is rotatably connected to the first support 21. The output end of the first drive component 22 is rotatably connected to the linkage component 23. The linkage component 23 is used to drive the sand unloading door body 1 to rotate upward or downward around its rotational connection point with the sand mixer body, so as to cooperate with the first drive component 22 to complete the opening or closing operation of the sand outlet. Through the coordinated action of the linkage component 23 and the first drive component 22, the sand unloading door body 1 is stably driven to accurately complete the upward rotation opening or downward rotation closing action. When rotating downward to close, the door body can use its own weight to assist in closing, improve sealing reliability, and reduce sand leakage. When rotating upward to open, the sand unloading door body can be moved away from the sand outlet, improving the space utilization rate of the sand unloading door, the sand unloading efficiency, and reducing sand accumulation in the sand unloading door.

[0047] Preferably, such as Figures 1-3As shown, in this embodiment, the linkage component 23 includes a bidirectional link 231 and a tridirectional link 232. One end of the bidirectional link 231 is rotatably connected to the sand discharge door body 1. The first end of the tridirectional link 232 is rotatably connected to the opposite end of the bidirectional link 231. The second end of the tridirectional link 232 is rotatably connected to the first support 21. The third end of the tridirectional link 232 is rotatably connected to the output end of the first drive member 22. When the sand discharge door body 1 is flipped downwards to the position of closing the sand outlet, the connection point of the first bidirectional link 231 and the tridirectional link 232, the rotation connection point of the tridirectional link 232 and the first support 21, and the rotating shaft (25) will be on the same straight line, forming a dead point of the mechanism. At this time, the reaction force generated by the sand discharge door body 1 due to its contact with the sand outlet will be released. The force of the sand discharge door 1 is transmitted to the three-way link 232 through the first two-way link 231. This force acts on the dead point position along the link axis and cannot push the three-way link 232 to rotate, thereby locking the entire linkage assembly 23 and the sand discharge door body 1 in the closed state, achieving dead point locking. When the sand discharge door body 1 is flipped down to the closed position, the rotation connection points of each link form a stable mechanical support structure, which can offset external forces such as sand impact and prevent the sand discharge door body 1 from being opened accidentally. The dead point characteristics of the mechanical structure itself achieve reliable locking without the need for an additional locking device. This simplifies the structure and can maintain a stable sealing effect in the closed state, further reducing sand leakage. At the same time, it improves the safety and reliability of equipment operation and ensures the stable and orderly operation of sand discharge.

[0048] Optionally, in this embodiment, the first driving component 22 is a linear cylinder, which can stably drive the three-way connecting rod 232 of the linkage component 23 to rotate around the fulcrum through the linear extension and retraction motion of the linear cylinder. This, in turn, drives the first two-way connecting rod 231 and the sand discharge gate body 1 to complete the upward or downward flipping action, accurately realizing the opening or closing of the sand outlet. The linear cylinder has the characteristics of large output force, rapid and stable action response, and can provide reliable power for the flipping of the sand discharge gate, ensuring efficient operation under frequent opening and closing conditions. At the same time, the linear motion characteristics of the linear cylinder are closely matched with the multi-link structure of the linkage component 23, which can accurately control the formation and release of the dead point locking state, further improving the sealing and safety of the sand discharge gate when it is closed, reducing the risk of sand leakage. Moreover, the cylinder structure is relatively simple and easy to maintain, which helps to reduce the operating cost of the equipment. In other embodiments, the first driving component 22 can also be an electric push rod or a hydraulic cylinder, etc.

[0049] Preferably, such as Figures 1-3As shown, in this embodiment, the door opening and closing unit 2 also includes a rotating plate 24 and a rotating shaft 25. The sand unloading door is mounted on the rotating plate 24, and the linkage component 23 is rotatably connected to the rotating plate 24. The rotating shaft 25 passes through both the top of the rotating plate 24 and the body of the sand mixer. Through the cooperation of the rotating plate 24 and the rotating shaft 25, a stable rotation fulcrum is provided for the sand unloading door. This allows the linkage component 23 to drive the rotating plate 24 to rotate around the rotating shaft 25, thereby driving the sand unloading door body 1 to achieve a smooth and precise flipping action. The structure of the rotating plate 24 and the rotating shaft 25 enhances the stability of the connection between the sand unloading door and the sand mixer body, reduces shaking and offset during the flipping process, and ensures that the sand unloading door can fit more tightly against the edge of the sand outlet, further improving the sealing performance. At the same time, the design of the rotating shaft 25 passing through the top of the rotating plate 24 and the body of the sand mixer makes the force transmission more uniform and reduces the risk of accidents. This reduces wear caused by localized stress and extends the service life of the equipment. In addition, the rotating plate 24 provides a unified installation benchmark for the sand unloading door body 1 and the linkage component 23. The linkage component 23 only needs to be rotated to connect with the rotating plate 24 to complete the association with the sand unloading door. It does not need to be directly adapted to the sand unloading door body 1, which may have a more complex shape, structure or material. At the same time, the rotating shaft 25 clearly defines the rotation center, which provides a clearer reference for the installation position of the linkage component 23, the length of each link and the setting of the rotation connection point. During debugging, the transmission parameters of the linkage component 23 can be adjusted around the fixed rotation center of the rotating shaft 25, which reduces the adaptation difficulty caused by the shape or installation position deviation of the sand unloading door body 1. This facilitates the installation and debugging of the linkage component 23, optimizes the overall transmission efficiency, and better adapts to the functional requirement of preventing the sand door from being opened accidentally by locking at the dead point.

[0050] Preferably, such as Figures 1-2 As shown, in this embodiment, the sand unloading door body 1 includes a first support plate 11 and a wear-resistant plate 12. The first support plate 11 is connected to the door opening and closing unit 2, and the wear-resistant plate 12 is fixedly connected to the first support plate 11. The wear-resistant plate 12 is closer to the sand outlet than the first support plate 11, and can achieve a stable connection with the door opening and closing unit 2 through the first support plate 11, ensuring the overall structural strength and transmission stability of the sand unloading door body 1. At the same time, the wear-resistant plate 12, which is close to the sand outlet, directly contacts the sand and withstands the impact and friction of the sand. The first support plate 11 can ensure the efficient transmission of the driving force of the door opening and closing unit 2 and ensure the accuracy of the sand unloading door's flipping action. The wear-resistant plate 12 can significantly improve the wear resistance of the sand unloading door body 1 in contact with the sand, extend the service life of the door, reduce the problem of increased sealing gaps caused by wear, maintain good sealing performance, reduce the risk of sand leakage, and thus ensure the long-term stable operation of the equipment and reduce maintenance frequency and cost.

[0051] Preferably, the first support plate 11 is made of steel plate, which has high structural strength and rigidity, providing a stable load-bearing foundation for the sand unloading door body 1, ensuring the connection strength with the door opening and closing unit 2, reliably transmitting the driving force of the linkage component 23, and ensuring the stability of the sand unloading door's flipping action. In other embodiments, the first support plate 11 may also be made of materials such as chromium-molybdenum alloy plate or ductile iron.

[0052] Preferably, the wear-resistant plate 12 is made of ultra-high molecular weight polyethylene (UHMWPE). UHMWPE has higher hardness, toughness, and wear resistance compared to existing materials, enabling the wear-resistant plate 12 to maintain its structural integrity when in long-term contact with sand and subjected to sand impact and friction, effectively resisting the wear of sand on the sand discharge gate body 1. In other embodiments, the wear-resistant plate 12 may also be made of materials such as stainless steel or hard alloy.

[0053] Specifically, in this embodiment, the sand unloading door body 1 also includes a first sealing element. The first sealing element is disposed on the outer periphery of the structure composed of the first support plate 11 and the wear-resistant plate 12. When the sand unloading door is closed, the first sealing element can tightly fit with the edge of the sand outlet, filling the gap between the first support plate 11, the wear-resistant plate 12 and the sand outlet. This can effectively prevent sand from leaking from the gap when the sand unloading door is closed, avoiding sand waste and pollution to the surrounding environment of the equipment. At the same time, it reduces the movement gap of sand particles entering the door opening and closing unit 2 or the linkage component 23, preventing component wear or malfunction caused by sand jamming. Combined with the wear-resistant properties of the wear-resistant plate 12, it further improves the overall sealing reliability, ensures the stability of equipment operation, and reduces maintenance needs and costs caused by leakage or jamming.

[0054] Specifically, such as Figures 1-3 As shown, in this embodiment, the sand discharge gate for the sand mixer also includes a residual sand cleaning unit 3. The residual sand cleaning unit 3 is installed on the main body of the sand mixer. The residual sand cleaning unit 3 is used to clean the residual sand at the sand outlet, which can prevent the accumulation of residual sand from affecting the sealing performance between the sand discharge gate and the sand outlet, reduce the problem of sand leakage caused by residual sand jamming, and prevent the hardening of residual sand from increasing the opening and closing resistance of the gate, ensuring the long-term stable operation of the sand discharge gate, and further improving the overall working efficiency and maintenance convenience of the sand mixer.

[0055] Preferably, in this embodiment, the residual sand cleaning unit 3 includes a nozzle and a spray pipe. The nozzle is installed on the main body of the sand mixer and is positioned above the sand outlet. The nozzle opening faces downward to align with the sand outlet or the residual sand accumulation area. The spray pipe is connected to the nozzle and is also connected to an external air supply device, enabling precise spraying of gas or liquid onto the target area, directly acting on the residual sand. This achieves effective cleaning of the sand outlet and areas prone to residual sand accumulation, ensuring targeted and thorough cleaning, preventing residual sand from remaining at the edge of the sand outlet or in the accumulation area. This better ensures the sealing of the sand discharge door and the sand outlet, reduces sand leakage caused by residual sand, prevents the hardening of residual sand from increasing the resistance to opening and closing the door, ensures long-term stable operation of the sand discharge door, and improves the working reliability and maintenance convenience of the sand mixer.

[0056] Preferably, such as Figure 3 As shown in this embodiment, the sand discharge gate for the sand mixer also includes a sand baffle 4. The sand baffle 4 is installed on the side wall of the sand mixer body and is located on the sand-facing side of the sand outlet, corresponding to the main direction of sand being thrown out of the sand mixer. It can directly face the path of sand being thrown out by stirring or rotating. When the sand moves towards the sand outlet, it can be directly intercepted from the front, preventing the sand from flowing around from the side, thereby effectively blocking the thrown sand, blocking the impact of sand, eliminating the impact of sand, and reducing the amount of residual sand after the impact of sand, reducing the amount of sand accumulated on the sand impact surface after the sand gate is opened, reducing the amount of sand adhering, and reducing sand splashing and accumulation, thereby improving the cleanliness of the sand discharge area, reducing the labor cost of cleaning accumulated sand and adhering sand, reducing sand waste, and also preventing the accumulation of sand from interfering with the opening and closing of the sand discharge gate, extending the service life of equipment components, and ensuring the stability of the sand mixer operation.

[0057] Preferably, in this embodiment, the sand-blocking component 4 includes a second support plate and a sand-blocking plate. The sand-blocking plate is fixedly connected to the second support plate, and the second support plate provides stable support for the sand-blocking plate, enhancing the overall load-bearing capacity and structural strength of the sand-blocking component 4. It can more accurately and efficiently block sand thrown towards the sand outlet, further improving the interception effect against sand impact, reducing residual sand, accumulated sand, and sticky sand, ensuring the stable performance of the sand-blocking function, and extending the service life of the sand-blocking component 4. This better cooperates with the sand-unloading gate body 1 to improve the overall sealing performance and sand-unloading efficiency.

[0058] Preferably, the second support plate is made of steel plate, which, with its inherent high structural strength and rigidity, provides stable and reliable support for the sand baffle plate. This effectively withstands the force transmitted by the sand baffle plate when blocking sand impact, preventing deformation or damage to the sand baffle 4 due to long-term sand impact. This enhances the overall durability and stability of the sand baffle 4, ensuring the sand baffle plate continues to function efficiently, reducing equipment failures caused by support component failure, lowering maintenance frequency and costs, and extending the overall service life of the sand discharge gate used in the sand mixer. In other embodiments, the second support plate can also be made of wear-resistant ceramic composite material or ductile iron, etc.

[0059] Preferably, the sand baffle is made of polytetrafluoroethylene (PTFE), which utilizes its extremely low coefficient of friction and non-stick properties to reduce the amount of sand adhering after impact, making the sand easier to slide off and reducing sand residue. PTFE also has good wear resistance, corrosion resistance, and a certain degree of flexibility, which can reduce its own wear when subjected to sand impact, extend its service life, and buffer part of the impact force, preventing rigid collisions from damaging the sand baffle 4 and surrounding structures, further ensuring the stability of the sand-blocking effect, reducing equipment maintenance costs, and improving the overall operating efficiency of the sand discharge gate used in the sand mixer. In other embodiments, the sand baffle can also be made of nylon plate or wear-resistant ceramic plate, etc.

[0060] Preferably, such as Figure 3 As shown, in this embodiment, there are two first supports 21, which are respectively located on both sides of the sand unloading door body 1. There are two sets of linkage components 23, with connecting rods passing through the corresponding positions of each set of linkage components 23. The output end of the first drive component 22 is rotatably connected to the connecting rod passing through the third end of the two three-way connecting rods 232. The connecting rod passing through the second end of the two three-way connecting rods 232 is also rotatably connected to the two first supports 21. This enables synchronous driving and stable support of both sides of the sand unloading door body 1. The symmetrical design ensures that the sand unloading door is evenly stressed during the flipping process, avoiding problems such as jamming, wear, or poor sealing caused by uneven stress on one side. The rigid connection of the connecting rods ensures the consistency of the actions of the two sets of linkage components 23, accurately controls the formation and release of the dead point locking state, and further improves the sealing and stability of the sand unloading door when it is closed.

[0061] This embodiment also discloses a sand mixer. In this embodiment, the sand mixer includes a main body and a sand discharge door for the sand mixer. The sand discharge door for the sand mixer is installed on the main body of the sand mixer and can realize the precise opening and closing of the sand outlet. Moreover, by taking advantage of the characteristics of the sand discharge door to use its own gravity to assist in closing when it flips upward and to form a dead point lock when it flips downward, the sealing reliability can be greatly improved and the sand leakage can be reduced.

[0062] For ease of understanding, combined with Figures 1-3 The working process of the sand discharge gate used in a sand mixer is described below. Specifically, the working process of the sand discharge gate used in a sand mixer includes: raw sand and hardener are put into the sand mixing cylinder in a certain proportion and stirred and mixed. The first sealing element prevents the sand and hardener from flowing out. The gate opening and closing unit 2 locks itself and holds the sand discharge gate body 1, so the sand discharge gate body 1 cannot be pushed open from the inside. After the raw sand and hardener are fully mixed, the linkage component 23, driven by the first driving component 22, breaks the locking point and continues to operate, opening the sand discharge gate body 1 to the correct position, away from the sand outlet. At this time, the sand in the sand mixing cylinder is thrown out through the sand gate. During the sand discharge process, the residual sand cleaning unit 3 on the sand discharge gate body 1 continuously blows to reduce the residual sand on the outer surface of the sand outlet. The front of the baffle plate blocks the thrown sand, eliminating sand impact and reducing splashing and accumulation. After the sand is completely discharged, the driving linkage component 23 drives the sand discharge gate body 1 to the correct position, the linkage component 23 forms a lock, the residual sand cleaning unit 3 stops blowing, and then the next cycle begins.

[0063] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A sand discharge gate for a sand mixer, used to open or close the sand outlet on the side wall of the sand mixer body, characterized in that, The sand discharge gates used in sand mixers include: The sand discharge gate body (1) is covered at the sand outlet on the side wall of the sand mixer body, and the top of the sand discharge gate body (1) is rotatably connected to the sand mixer body. The door opening and closing unit (2) is installed on the main body of the sand mixer and is connected to the sand unloading door body (1). The door opening and closing unit (2) is used to drive the sand unloading door body (1) to flip upward or downward so as to open or close the sand outlet.

2. The sand discharge gate for a sand mixer according to claim 1, characterized in that, The door opening and closing unit (2) includes: The first support (21) is mounted on the body of the sand mixer; The first driving member (22) is disposed on the first support (21); Linkage component (23) is rotatably connected to the first support (21), and the output end of the first drive component (22) is rotatably connected to the linkage component (23). The linkage component (23) is used to drive the sand discharge gate body (1) to rotate upward or downward around its rotation connection point with the sand mixer body, so as to cooperate with the first drive component (22) to complete the opening or closing operation of the sand outlet.

3. The sand discharge gate for a sand mixer according to claim 2, characterized in that, The linkage component (23) includes: A two-way connecting rod (231), one end of which is rotatably connected to the sand unloading gate body (1); A three-way link (232) is provided, wherein the first end of the three-way link (232) is rotatably connected to the opposite end of the two-way link (231), the second end of the three-way link (232) is rotatably connected to the first support (21), and the third end of the three-way link (232) is rotatably connected to the output end of the first drive member (22).

4. The sand discharge gate for a sand mixer according to claim 2, characterized in that, The door opening and closing unit (2) also includes: Rotating plate (24), the sand unloading door is mounted on the rotating plate (24), and the linkage component (23) is rotatably connected to the rotating plate (24); The rotating shaft (25) passes through both the top of the rotating plate (24) and the body of the sand mixer.

5. The sand discharge gate for a sand mixer according to any one of claims 1-4, characterized in that, The sand-unloading gate body (1) includes: The first support plate (11) is connected to the door opening and closing unit (2); Wear-resistant plate (12) is fixedly connected to the first support plate (11), and the wear-resistant plate (12) is close to the sand outlet relative to the first support plate (11).

6. The sand discharge gate for a sand mixer according to claim 5, characterized in that, The sand unloading door body (1) also includes a first sealing element, which is disposed on the outer periphery of the structure formed by the first support plate (11) and the wear-resistant plate (12).

7. The sand discharge gate for a sand mixer according to any one of claims 1-4, characterized in that, The sand discharge gate for the sand mixer also includes a residual sand cleaning unit (3), which is installed on the main body of the sand mixer and is used to clean the residual sand at the sand outlet.

8. The sand discharge gate for a sand mixer according to claim 7, characterized in that, The residual sand cleaning unit (3) includes: The nozzle is mounted on the main body of the sand mixer and is positioned above the sand outlet with its opening facing downwards to align with the sand outlet or the residual sand accumulation area. The nozzle is connected to the nozzle and is also connected to an external air supply device.

9. The sand discharge gate for a sand mixer according to any one of claims 1-4, characterized in that, The sand discharge gate for the sand mixer also includes a sand baffle (4), which is disposed on the side wall of the sand mixer body and on the sand-facing side of the sand outlet.

10. A sand mixer, characterized in that, It includes a sand mixer body and a sand discharge gate for the sand mixer as described in any one of claims 1-9, wherein the sand discharge gate for the sand mixer is installed on the sand mixer body.

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