Automatic filling limiting device for container

Abstract

The utility model discloses an automatic container filling limiting device which is characterized in that the automatic container filling limiting device comprises a mounting plate, a floating ball assembly, a guide rod, a connecting rod mechanism and a valve assembly, the guide rod is fixedly connected with the mounting plate, and the floating ball assembly is provided with a through hole corresponding to the guide rod, so that the floating ball assembly can move up and down along the guide rod and can freely rotate; the valve assembly comprises a valve body and a valve element rod, the valve body is fixedly connected with the mounting plate, the connecting rod mechanism comprises a swing rod and a connecting rod, the swing rod is hinged to the guide rod, the two ends of the connecting rod are hinged to the swing rod and the valve body respectively, an up-down guide assembly corresponding to the valve element rod is arranged in the valve body, and the upper end of the valve element rod and the turning plate form a locking structure. And the lower end is hinged with the oscillating rod. The device is simple in structure and good in stability.

Description

Technical Field

[0001] The utility model relates to the technical field of container filling safety, and more particularly to an automatic filling limiting device for a container. Background Art

[0002] The storage and transportation of refrigerated liquefied gas is an extremely special field. The requirements for auxiliary devices installed inside the storage tanks shall be in accordance with the anti-overfilling design requirements of GB / T18442.3-2019 "Fixed Vacuum Insulated Cryogenic Pressure Vessels": the inner container shall be provided with an overflow port. Small cryogenic containers with a geometric volume not exceeding 10 m³ shall also be equipped with an anti-overfilling device. GB / T34510-2017 also has similar requirements for vehicle gas cylinders. It is necessary to ensure that a certain safety space is left at the top of the gas cylinder liner, so an anti-overfilling device needs to be installed in the storage tank liner. In order to prevent accidents caused by overfilling of the tank body, the design and manufacturing units shall propose measures to control the maximum filling volume of the tank body, and the manufacturing unit shall be responsible for the geometric volume less than or equal to 10m³. 3 The cryogenic pressure vessel is equipped with a filling limit device. One of the existing technologies is: overflow port observation + manual valve closing. The main drawback of this technology in the application process is that the cryogenic medium flows out too fast during the pump filling process, and there is no time to close the valve, resulting in overfilling; that is, this technical solution is only applicable to non-pump filling status and cannot be used in all working conditions. The second existing technology is the reserved gas phase space method. This technology pre-sets a small gas phase space tank inside the tank body, which is generally 10% of the total volume. It is a welded closed structure with only a small air intake hole. During the pump filling process, only a very small amount of liquid can flow into the small air intake hole, which can automatically cut off the pump filling process. In actual applications, the internal small tank is often flattened, causing the tank body to be in an abnormal working state. For example, the patent applicant disclosed in Chinese patent publication number CN212745968U a container filling limit device fixed inside the container, comprising a filling limit valve body and a float assembly, wherein the filling limit valve body includes a liquid filling channel connected to the container, and is characterized in that the float assembly is connected to the valve body via a lever assembly, and a flap is also provided in the liquid filling channel connected to the filling limit valve body, one end of the flap is provided with a hinge shaft, and the movable end face of the flap rotating along the hinge shaft forms a movable closed connection with the liquid filling channel, and the other movable end face forms a push connection with the lever assembly (including a soft cable). This patent structure implements the buoyancy transmission through the soft cable in the first stage. Due to the influence of thermal expansion and contraction, there is a hidden danger of unstable buoyancy transmission. The influence of fluid thrust also needs to be considered, so it is necessary to make structural improvements. Summary of the Invention

[0003] The purpose of the utility model is to provide a stable, reliable and simple structured automatic filling limit device for a container in order to solve the deficiencies of the prior art.

[0004] The utility model adopts the following technical solutions to achieve the above-mentioned purpose: a container automatic filling limit device, characterized in that it includes a mounting plate, a float assembly, a guide rod, a connecting rod mechanism, and a valve assembly. The guide rod is fixedly connected to the mounting plate, and the float assembly is provided with a through hole corresponding to the guide rod, so that the float assembly can move up and down along the guide rod and can rotate freely.

[0005] The valve assembly includes a valve body and a valve core rod, the valve body is connected and fixed to the mounting plate, the connecting rod mechanism includes a swing rod and a connecting rod, the swing rod is hinged to the guide rod, the two ends of the connecting rod are hinged to the swing rod and the valve body respectively, and the valve body is provided with upper and lower guide assemblies corresponding to the valve core rod, and one end of the valve core rod is hinged to the swing rod.

[0006] As a further illustration of the above scheme, the upper and lower guide components include a guide tube standing at the bottom of the valve body, the upper end of the valve core rod is connected to a flap and forms a locking structure with it, and the lower end passes through the guide tube and is connected to the swing rod.

[0007] Furthermore, a bent plate is provided at the end of the mounting plate, an ear piece is provided on the upper portion of the valve body, and a bolt is provided on the ear piece to connect and fix it with the bent plate.

[0008] Furthermore, an inner tube is provided in the through hole of the float assembly, and the guide rod is in sliding contact with the inner wall of the inner tube, which does not cause jamming.

[0009] Furthermore, the mounting plate is located above the guide rod, the mounting plate is perpendicular to the guide rod, and the top end of the guide rod is welded to the mounting plate to improve stability.

[0010] Furthermore, a stop is provided at the bottom end of the guide rod to prevent the float assembly from detaching from the guide rod.

[0011] Furthermore, the swing rod is provided with an upper transverse section, a lower transverse section and an arc section. The arc section is connected between the upper transverse section and the lower transverse section, just corresponding to the spherical surface of the float assembly, thereby avoiding interference between the swing rod and the float assembly during the swinging process.

[0012] The beneficial effects that can be achieved by the utility model by adopting the above technical solutions are:

[0013] The utility model adopts an automatic filling limiting structure for a container which is mainly composed of a mounting plate, a float assembly, a guide rod, a connecting rod mechanism and a valve assembly. The guide rod is connected and fixed to the mounting plate, and the float assembly is provided with a through hole corresponding to the guide rod, so that the float assembly can move up and down along the guide rod and can rotate freely; the valve assembly includes a valve body and a valve core rod, and the valve body is connected and fixed to the mounting plate. The connecting rod mechanism includes a swing rod and a connecting rod. The swing rod is hinged to the guide rod, and the two ends of the connecting rod are hinged to the swing rod and the valve body respectively. Upper and lower guide assemblies corresponding to the valve core rod are provided in the valve body, the upper end portion of the valve core rod forms a locking structure with the flap, and the lower end is hinged to the swing rod. The floating ball assembly moves up and down along the guide rod, driving the connecting rod structure to move, and the valve assembly is opened and closed under the push of the filling liquid. The control structure is simple and the stability is good. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the structure of the valve in the fully open state of the present invention.

[0015] Figure 2 for Figure 1 side view.

[0016] Figure 3 It is a structural diagram of the valve in fully closed state.

[0017] Explanation of the accompanying drawings: 1, mounting plate 2, float assembly 2-1, through hole 3, guide rod 3-1, stop position 4, connecting rod mechanism 4-1, swing rod 4-11, upper transverse section 4-12, lower transverse section 4-13, arc section 4-2, connecting rod 5, valve assembly 5-1, valve body 5-11, upper and lower guide assemblies 5-12, ear piece 5-2, valve core rod. DETAILED DESCRIPTION

[0018] In the description of the present invention, it should be noted that, for directional words, such as the terms "center", "horizontal", "longitudinal", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and so on, indicating directions and positional relationships are based on the directions or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and cannot be understood as limiting the specific protection scope of the present invention.

[0019] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features. Therefore, the terms "first" and "second" may explicitly or implicitly include one or more of these features. In the description of this utility model, "at least" means one or more, unless otherwise specifically defined.

[0020] In this utility model, unless otherwise specified or limited, the terms "assemble," "connect," and "connect" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integral connection; mechanical connection; direct connection, connection through an intermediate medium, or internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0021] In the utility model, unless otherwise specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being "above," "below," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "above," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0022] The following description of the embodiments of the present invention is further described in conjunction with the accompanying drawings to make the technical solutions and beneficial effects of the present invention clearer and more specific. The following description of the embodiments with reference to the accompanying drawings is illustrative and intended to explain the present invention, but should not be construed as limiting the present invention.

[0023] like Figure 1-Figure 3 As shown, the utility model is an automatic filling limit device for a container, which includes a mounting plate 1, a float assembly 2, a guide rod 3, a connecting rod mechanism 4, and a valve assembly 5. The guide rod 3 is fixedly connected to the mounting plate 1. The float assembly 2 is provided with a through hole 2-1 corresponding to the guide rod 3. The through hole 2-1 is located in the middle of the float assembly, so that the float assembly 2 can move up and down along the guide rod and can rotate freely. An inner tube is provided in the through hole 2-1 of the float assembly 2, and the guide rod 3 is in sliding contact with the inner wall of the inner tube without causing jamming. The mounting plate 1 is located above the guide rod 3, and the mounting plate 1 is perpendicular to the guide rod 3. The top of the guide rod 3 is welded to the mounting plate 1 to improve stability. A stop 3-1 is provided at the bottom end of the guide rod 3 to prevent the float assembly from detaching from the guide rod. The stop 3-1 is a screw sleeve sleeved on the end of the guide rod, and can also be in the form of a pin or the like.

[0024] The valve assembly 5 includes a valve body 5-1 and a valve core rod 5-2. The valve body 5-1 is fixedly connected to the mounting plate 1. The connecting rod mechanism 4 includes a swing rod 4-1 and a connecting rod 4-2. The swing rod 4-1 is hinged to the guide rod 3. The two ends of the connecting rod 4-2 are respectively hinged to the swing rod 4-1 and the valve body 5-1. The valve body 5-1 is provided with an upper and lower guide assembly 5-11 corresponding to the valve core rod 5-2. One end of the valve core rod 5-2 is hinged to the swing rod 4-1. The upper and lower guide assembly 5-11 includes a guide tube standing at the bottom of the valve body 5-1. The upper end of the valve core rod is connected to a flap and forms a locking structure with it. The lower end of the valve core rod 5-2 passes through the guide tube and is connected to the swing rod 4-1. A bending plate 1-1 is provided at the end of the mounting plate 1. An ear piece 5-12 is provided on the upper part of the valve body 5-1. The ear piece is provided with a bolt to connect and fix it to the bending plate. In this embodiment, the swing rod 4-1 is provided with an upper transverse section 4-11, a lower transverse section 4-12 and an arc section 4-13. The arc section is connected between the upper transverse section and the lower transverse section, and corresponds exactly to the spherical surface of the float assembly, thereby avoiding interference between the swing rod and the float assembly during the swinging process.

[0025] Compared with the prior art, the valve assembly adopted in the present invention includes a valve body and a valve core rod, the valve body is connected and fixed to a mounting plate, the connecting rod mechanism includes a swing rod and a connecting rod, the swing rod is hinged to the guide rod, the two ends of the connecting rod are hinged to the swing rod and the valve body respectively, an upper and lower guide assembly corresponding to the valve core rod is provided in the valve body, one end of the valve core rod is hinged to the swing rod, and the floating ball assembly moves along the guide rod to drive the connecting rod structure to move, and the valve assembly is opened and closed under the push of the filling liquid, and the control structure is simple and the stability is good.

[0026] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the creative concept of the present invention, which all fall within the scope of protection of the present invention.

Claims

1. A container automatic filling limit device, characterized in that: It includes a mounting plate, a float assembly, a guide rod, a connecting rod mechanism, and a valve assembly. The guide rod is fixedly connected to the mounting plate, and the float assembly is provided with a through hole corresponding to the guide rod. The valve assembly includes a valve body and a valve core rod, the valve body is connected and fixed to the mounting plate, the connecting rod mechanism includes a swing rod and a connecting rod, the swing rod is hinged to the guide rod, the two ends of the connecting rod are hinged to the swing rod and the valve body respectively, and the valve body is provided with upper and lower guide assemblies corresponding to the valve core rod, and one end of the valve core rod is hinged to the swing rod.

2. The automatic filling limit device for a container according to claim 1, characterized in that: The upper and lower guide components include a guide tube standing at the bottom of the valve body, the upper end of the valve core rod is connected to the flap and forms a locking structure therewith, and the lower end passes through the guide tube and is connected to the swing rod.

3. The automatic filling limit device for a container according to claim 1, characterized in that: A bent plate is provided at the end of the mounting plate, an ear piece is provided on the upper part of the valve body, and a bolt is provided on the ear piece to connect and fix with the bent plate.

4. The automatic filling limit device for a container according to claim 1, characterized in that: An inner tube is arranged in the through hole of the float assembly, and the guide rod is in sliding contact with the inner wall of the inner tube.

5. The automatic filling limit device for a container according to claim 1, characterized in that: The mounting plate is located above the guide rod, the mounting plate is perpendicular to the guide rod, and the top end of the guide rod is welded to the mounting plate.

6. The automatic filling limit device for a container according to claim 5, characterized in that: The bottom end of the guide rod is provided with a stop position.

7. The automatic filling limit device for a container according to claim 1, characterized in that: The swing rod is provided with an upper transverse section, a lower transverse section and an arc section. The arc section is connected between the upper transverse section and the lower transverse section and corresponds to the spherical surface of the float assembly.

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