A sealing device for the infeed and discharge opening of a concrete mixing truck

Abstract

The utility model relates to the technical field of transport vehicle discloses a sealing device for inlet and outlet of concrete mixing transport vehicle, including the tank body of horizontal arrangement, its front end passes through tank body support front desk support, rear end passes through tank body support back desk support, the inlet cover assembly of being equipped with tank body top, the inlet cover assembly includes. In the utility model, through design eccentric locking pin shaft and the structure of the reversible inlet cover, it is convenient and the mixing station precision butt joint loading, promotes the operating convenience, can be closely combined with the inlet sealing surface through the rotary compression plate welding spare of tightly pressing sealing rubber strip, effectively guarantees the sealing reliability when tank body rotation in the transportation process, avoids the material waste and environmental pollution caused by concrete leakage, reduces the damage of the equipment to the residual concrete hardening in the unloading stage, prolongs the equipment life, and the operation is simple and efficient, and the sealing performance and operation efficiency of loading and unloading link in the concrete transportation process are improved significantly.

Description

Technical Field

[0001] This utility model relates to the field of transport vehicle technology, and in particular to a sealing device for the inlet and outlet of a concrete mixer truck. Background Technology

[0002] As a key piece of equipment for transporting concrete in construction, the structural design of the concrete mixer truck's inlet and outlet directly affects transportation efficiency, material loss, and equipment maintenance costs. The inlet and outlet are the core channels for concrete materials to enter and exit the tank. They must allow for rapid connection with the mixing plant during loading, maintain strict sealing during transportation to prevent concrete segregation or leakage, and ensure smooth unloading and ease of operation. Therefore, their structural rationality is crucial to the overall performance of the vehicle.

[0003] In existing technologies, the feed inlet cover of concrete mixer trucks often uses a hinged connection combined with a manually bolted fastening structure. Multiple bolts connect and fix the cover plate to the feed inlet flange, and a rubber gasket between the cover plate and the flange achieves a seal. The discharge outlet typically uses a gate valve or a flip-top structure. The gate valve is opened and closed by a manually cranked gate, while the flip-top structure uses a linkage mechanism to flip the cover plate, relying on mechanical hard contact or a simple sealing ring for sealing. The underlying technical principle is to achieve the opening, closing, and sealing functions of the feed inlet and outlet through rigid mechanical fastener connections or simple planar sealing methods.

[0004] However, the existing feed inlet cover structure requires tightening bolts one by one to fix or remove the cover plate during operation. This is not only cumbersome and time-consuming, affecting the loading efficiency, but also makes it difficult to ensure the uniformity of bolt tightening, which can easily lead to local sealing problems. During the rotation and transportation of the tank, concrete leakage is likely to occur, resulting in material waste and environmental pollution. This is the key pain point that this utility model solves. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a sealing device for the inlet and outlet of a concrete mixer truck, aiming to improve the problem that the existing inlet cover structure requires tightening bolts one by one to fix or disassemble the cover plate during operation, which is not only cumbersome and time-consuming, but also affects the loading efficiency.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a sealing device for the inlet and outlet of a concrete mixer truck, comprising:

[0007] The horizontally arranged tank has a front-end support via a tank body and a rear-end support via a tank body.

[0008] The feed inlet cover assembly is located at the top of the tank body, and the feed inlet cover assembly includes:

[0009] The feed inlet flip-up welding component and locking welding component are welded to the feed inlet. The feed inlet cover is hinged to the feed inlet on one side by a flip-up pin. The sealing strip is fixed in the groove inside the feed inlet cover. The locking pin is slidably and rotatably set in the locking welding component and is used to press or release the feed inlet cover. The pressure plate welding component is welded to the feed inlet cover in conjunction with the feed inlet cover flip-up welding component.

[0010] The discharge port cover assembly is located at the rear of the tank body, and the discharge port cover assembly includes:

[0011] The discharge port is welded to the tail of the tank. The discharge port cover has a sealing ring on its inner side. The fixing screw is welded to the discharge port. The clamping nut is threaded to the fixing screw and is used to tighten or loosen the discharge port cover.

[0012] Furthermore, the fixing screw adopts a trapezoidal thread, and the tightening reliability of the clamping nut is ensured by the thread self-locking.

[0013] Furthermore, the locking pin adopts an eccentric structure, with an operating handle welded to one end, which can be used to lock or unlock the feed port cover by pushing, pulling and rotating.

[0014] Furthermore, a pressure plate is welded onto the feed inlet cover. After the locking pin rotates, it presses the pressure plate tightly, so that the sealing strip fits tightly against the feed inlet.

[0015] Furthermore, the discharge port cover and the clamping nut are connected by a spherical movable connection and fixed by a limiting cover plate to compensate for the deformation of the sealing surface.

[0016] Furthermore, a discharge port cover operating handle is welded onto the clamping nut, which is used to drive the clamping nut to rotate, thereby achieving the clamping and sealing or loosening of the discharge port cover.

[0017] This utility model has the following beneficial effects:

[0018] In this invention, by designing an eccentric locking pin and a flip-up inlet cover structure, the driver can quickly open and lock the inlet cover simply by operating the handle. The opening angle can reach 150°, facilitating precise docking with the mixing plant for loading and improving operational convenience. Furthermore, the rotating and tightening pressure plate welded components ensure a tight seal between the sealing strip and the inlet sealing surface, effectively guaranteeing the sealing reliability during tank rotation and preventing material waste and environmental pollution caused by concrete leakage. During unloading, rotating the operating handle in the opposite direction loosens the clamping nut, disengaging the sealing ring from the outlet and facilitating smooth unloading in conjunction with the tank's reverse rotation. During sealing, the clamping nut is tightened along the trapezoidal thread of the fixing screw, and the spherical connection structure adapts to the slight deformation of the sealing surface, further ensuring the tightness of the seal after unloading. This reduces damage to the equipment from hardened residual concrete, extends equipment lifespan, and is simple and efficient to operate, significantly improving the sealing performance and operational efficiency of the loading and unloading processes during concrete transportation. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of a sealing device for the inlet and outlet of a concrete mixer truck proposed in this utility model.

[0020] Figure 2 A schematic diagram of the inlet cover assembly of a sealing device for the inlet and outlet of a concrete mixer truck, as proposed in this utility model.

[0021] Figure 3 This utility model presents a schematic diagram of the internal structure of the outlet cover assembly of a sealing device for the inlet and outlet of a concrete mixer truck.

[0022] Legend:

[0023] 1. Tank body; 2. Inlet cover assembly; 201. Pressure plate welded part; 202. Inlet cover; 203. Sealing strip; 204. Inlet cover flip welded part; 205. Inlet; 206. Locking welded part; 207. Operating handle; 208. Locking pin; 209. Inlet flip welded part; 210. Flip pin; 3. Outlet cover assembly; 301. Outlet cover operating handle; 302. Outlet cover; 303. Sealing ring; 304. Outlet; 305. Compression nut; 306. Limiting cover plate; 307. Fixing screw; 4. Tank body support front end; 5. Tank body support back end. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Reference Figures 1-3 One embodiment of this utility model provides: a sealing device for the inlet and outlet of a concrete mixer truck, comprising:

[0026] The horizontally arranged tank 1 is supported at its front end by a front-end support 4 and at its rear end by a back-end support 5.

[0027] The feed inlet cover assembly 2 is located at the top of the tank body 1. The feed inlet cover assembly 2 includes:

[0028] The feed inlet flip welding part 209 and the locking welding part 206 are welded to the feed inlet 205. The feed inlet cover 202 is hinged to the feed inlet 205 on one side by a flip pin 210. The sealing strip 203 is fixed in the groove inside the feed inlet cover 202. The locking pin 208 is slidably and rotatably disposed in the locking welding part 206 for pressing or releasing the feed inlet cover 202. The pressure plate welding part 201 is welded to the feed inlet cover 202 in conjunction with the feed inlet cover flip welding part 204.

[0029] The discharge port cover assembly 3 is located at the tail of the tank body 1. The discharge port cover assembly 3 includes:

[0030] A discharge port 304 is welded to the tail of tank body 1, a discharge port cover 302 is provided with a sealing ring 303 on its inner side, a fixing screw 307 is welded to the discharge port 304, and a clamping nut 305 is threaded to the fixing screw 307 for tightening or loosening the discharge port cover 302. The fixing screw 307 adopts a trapezoidal thread, and the tightening nut 305 is guaranteed to be reliable through thread self-locking. The locking pin 208 adopts an eccentric structure, and an operating handle 207 is welded to one end. The discharge port cover 202 is opened by pushing, pulling and rotating. 02 Locking or unlocking, the feed port cover 202 is welded with a pressure plate welding part 201, the locking pin shaft 208 rotates and presses the pressure plate welding part 201, so that the sealing strip 203 is tightly attached to the feed port 205, the discharge port cover 302 and the clamping nut 305 are connected by a spherical movable connection and fixed by the limiting cover plate 306 to compensate for the deformation of the sealing surface, the clamping nut 305 is welded with a discharge port cover operating handle 301, which is used to drive the clamping nut 305 to rotate, so as to realize the clamping and sealing or loosening of the discharge port cover 302.

[0031] Specifically, during the loading stage, the driver operates the operating handle 207 of the inlet cover assembly 2, pulls the eccentric lock pin 208, causing the inlet cover 202 to rotate around the flip pin 210 until it opens to 150°. At this point, the inlet 205 can smoothly connect with the mixing plant for loading. After loading is completed, the driver pushes the lock pin 208 and simultaneously rotates the pressure plate welded part 201 to ensure that the sealing strip 203 is tightly fitted with the sealing surface of the inlet, thereby effectively ensuring the sealing reliability of the tank 1 during transportation and effectively preventing problems such as concrete leakage during transportation.

[0032] During the unloading phase, the driver rotates the discharge port cover operating handle 301 of the discharge port cover assembly 3 in the reverse direction to loosen the clamping nut 305, causing the sealing ring 303 to disengage from the discharge port 304. The tank body 1 then rotates in the reverse direction, allowing the concrete to be discharged smoothly. When sealing is required, the clamping nut 305 is tightened along the trapezoidal thread of the fixing screw 307. The spherical connection adapts to the deformation of the sealing surface, ensuring a good sealing effect and guaranteeing the sealing of the discharge port in the non-unloading state, preventing concrete residue or leakage from affecting subsequent use and transportation.

[0033] Working principle: During the loading stage, the driver operates the handle 207 of the inlet cover assembly 2 to pull the eccentric lock pin 208, causing the inlet cover 202 to rotate and open to 150° around the flip pin 210, allowing the inlet 205 to connect with the mixing plant for loading. After loading, the driver pushes the lock pin 208 and rotates the pressure plate welded part 201 to ensure that the sealing strip 203 is tightly fitted with the inlet sealing surface, ensuring reliable sealing when the tank 1 rotates during transportation. During the unloading stage, the driver rotates the outlet cover operating handle 301 of the outlet cover assembly 3 in the opposite direction, loosening the clamping nut 305, causing the sealing ring 303 to disengage from the outlet 304, and the tank 1 rotates in the opposite direction to discharge concrete. During sealing, the clamping nut 305 is tightened along the trapezoidal thread of the fixing screw 307, and the spherical connection adapts to the deformation of the sealing surface to ensure a good sealing effect.

[0034] Finally, it should be noted that the above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A sealing device for the infeed and discharge opening of a concrete mixing truck, characterized in that: include: The horizontally arranged tank (1) is supported at the front end by the front-end support (4) and at the rear end by the back-end support (5). A feed inlet cover assembly (2) is provided at the top of the tank body (1), the feed inlet cover assembly (2) comprising: The feed inlet flip welding part (209) and locking welding part (206) are welded to the feed inlet (205). The feed inlet cover (202) is hinged to the feed inlet (205) on one side by a flip pin (210). The sealing strip (203) is fixed in the groove inside the feed inlet cover (202). The locking pin (208) is slidably and rotatably disposed in the locking welding part (206) for pressing or releasing the feed inlet cover (202). The pressure plate welding part (201) is welded to the feed inlet cover (202) in conjunction with the feed inlet cover flip welding part (204). A discharge port cover assembly (3) located at the tail of the tank body (1), the discharge port cover assembly (3) comprising: A discharge port (304) welded to the tail of the tank body (1), a discharge port cover (302) with a sealing ring (303) on its inner side, a fixing screw (307) welded to the discharge port (304), and a clamping nut (305) threaded to the fixing screw (307) for tightening or loosening the discharge port cover (302).

2. A sealing device for the inlet and outlet of a concrete mixer truck according to claim 1, characterized in that: The fixed lead screw (307) adopts a trapezoidal thread, and the tightening reliability of the clamping nut (305) is ensured by the thread self-locking.

3. A sealing device for the inlet and outlet of a concrete mixer truck according to claim 1, characterized in that: The locking pin (208) adopts an eccentric structure, and an operating handle (207) is welded to one end. The inlet cover (202) can be locked or unlocked by pushing, pulling and rotating.

4. A sealing device for the inlet and outlet of a concrete mixer truck according to claim 1, characterized in that: A pressure plate welding part (201) is welded on the feed port cover (202). After the locking pin (208) rotates, it presses the pressure plate welding part (201) so that the sealing strip (203) fits tightly with the feed port (205).

5. A sealing device for the inlet and outlet of a concrete mixer truck according to claim 1, characterized in that: The discharge port cover (302) and the clamping nut (305) are connected by a spherical movable connection and fixed by a limiting cover plate (306) to compensate for the deformation of the sealing surface.

6. A sealing device for the inlet and outlet of a concrete mixer truck according to claim 1, characterized in that: The clamping nut (305) is welded with a discharge port cover operating handle (301), which is used to drive the clamping nut (305) to rotate, thereby achieving the clamping and sealing or loosening of the discharge port cover (302).

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