Combined vacuum chuck

Abstract

The utility model particularly provides a combined vacuum chuck. The combined vacuum chuck comprises a sponge chuck, a metal substrate and a metal cover plate, a plurality of semicircular through grooves are formed in the sponge suction cup in parallel, the size of the through grooves is matched with that of the fuel pellets, and through holes are formed in the through grooves. A metal substrate is mounted at the tops of the sponge suckers, and through holes corresponding to the sponge suckers in position and number are formed in the surface of the metal substrate; a metal cover plate is mounted above the metal substrate, a square cavity is formed after the metal cover plate and the metal substrate are combined, and a vacuum tube connector is formed in the top of the metal cover plate. According to the utility model, through the semicircular through grooves in the sponge sucker, the small holes in the sponge sucker can be attached to the cylindrical surface of the nuclear fuel pellet on the premise that the sponge sucker is not compressed; meanwhile, the square inner cavity formed between the metal substrate and the metal cover plate can ensure that negative pressure airflow is smooth, and the square inner cavity serves as a buffering cavity to ensure that negative pressure is evenly distributed in all small holes of the metal substrate.

Description

Technical Field

[0001] The utility model relates to the technical field of nuclear fuel pellet preparation, in particular to a combined vacuum suction cup fitted with the fuel pellet. Background Art

[0002] In the field of nuclear fuel pellet preparation, vacuum suction cups are often used for the transportation of nuclear fuel pellets. Currently, the most commonly used suction cup material is closed-hole EDPM (ethylene propylene diene monomer) sponge. This type of sponge is very soft and has closed holes inside. Negative pressure airflow can be achieved in a designated channel by punching holes. Most vacuum suction cups are designed to consist of a closed-hole EDPM sponge suction cup and a metal substrate. The function of the metal substrate is to provide a mounting and fixing foundation for the sponge suction cup, and at the same time to evenly distribute the negative pressure of the vacuum pipe on each small hole of the sponge suction cup. The function of the sponge suction cup is to directly fit the nuclear fuel pellets, so that the negative pressure of each small hole can absorb the nuclear fuel pellets.

[0003] However, in the current design, the metal substrate is a whole, and the negative pressure is evenly distributed on the sponge suction cup fitting surface through the complex airflow channel designed internally. The metal substrate of this design is complex to process and expensive, and once some nuclear fuel pellet fragments are sucked into the interior, it is inconvenient to clean. If not cleaned in time, the vacuum degree may decrease. In addition, the sponge suction cup is flat on the top and bottom. In order for the suction cup to fit the nuclear fuel pellet, the small hole on the suction cup can fit the cylindrical surface of the pellet, and the suction cup must be squeezed into the nuclear fuel pellet. On the one hand, this process increases the risk of damaging the nuclear fuel pellet, and on the other hand, if the vacuum degree is not good, the suction firmness of the suction cup is poor. Summary of the invention

[0004] The utility model aims to provide a combined vacuum suction cup, which can solve the problems of complex design and poor fit with fuel pellets in the existing vacuum suction cups in practical applications.

[0005] The technical solution of the utility model is as follows: a combined vacuum suction cup, the vacuum suction cup comprising: a sponge suction cup, a metal base plate and a metal cover plate; the sponge suction cup is provided with a plurality of semicircular through grooves in parallel, the size of which matches that of the fuel core block, and circular through holes are provided through the through grooves; a metal base plate is installed on the top of the sponge suction cup, and through holes corresponding to the position and number of the sponge suction cup are provided on the surface of the metal base plate; a metal cover plate is installed above the metal base plate, the metal cover plate is a cube structure with an opening at the bottom, and a square chamber is formed after being combined with the metal base plate, and a vacuum tube connection port is provided on the top of the metal cover plate.

[0006] Furthermore, the size of the semicircular through groove is Φ10 mm, and the through holes thereon are distributed in a matrix manner.

[0007] Furthermore, the sponge suction cup is made of EDPM sponge.

[0008] Furthermore, the metal substrate is a perforated flat plate, and the through holes on its surface have the same aperture as the through holes on the surface of the sponge suction cup.

[0009] Furthermore, the metal base plate and the metal cover plate are connected by screws.

[0010] Furthermore, semicircular airflow channels are provided on the folded edges around the metal cover plate to ensure that the through holes on the metal substrate corresponding to the folded edges can be ventilated normally.

[0011] Furthermore, the square chamber can serve as a buffer chamber to ensure that the negative pressure is evenly distributed in each through hole of the metal substrate.

[0012] Compared with the existing technology, the advantages of the utility model are:

[0013] 1. The sponge suction cup is provided with a semicircular through groove that matches the size of the fuel pellets. This allows the small holes on the sponge suction cup to fit the cylindrical surface of the nuclear fuel pellets without compressing the sponge suction cup, thereby improving the suction capacity and preventing damage to the fuel pellets.

[0014] 2. The combination of the metal substrate and the metal cover forms a square inner cavity, which ensures the smooth flow of negative pressure air on the one hand, and acts as a buffer cavity to ensure that the negative pressure is evenly distributed in the small holes of the metal substrate, thereby ensuring the consistency of the suction force of each small hole of the sponge suction cup, and at the same time facilitating the cleaning of the residual fuel core fragments inside. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A schematic diagram of the structure of a combined vacuum suction cup provided by the utility model;

[0016] Figure 2 A schematic diagram of the structure of the sponge suction cup provided by the utility model;

[0017] Figure 3 A schematic diagram of the disassembly structure of a combined vacuum suction cup provided by the utility model;

[0018] Figure 4 A schematic diagram of the structure of the metal cover provided by the utility model;

[0019] In the figure: 1. Sponge suction cup; 2. Metal base plate; 3. Metal cover plate; 4. Vacuum tube connection port. DETAILED DESCRIPTION

[0020] The technical solution of the utility model is described clearly and completely below in conjunction with the accompanying drawings and specific implementation methods. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] like Figure 1-Figure 4 As shown, a combined vacuum suction cup comprises a sponge suction cup 1, a metal substrate 2 and a metal cover plate 3; the sponge suction cup 1 is made of EDPM sponge, and a plurality of semicircular through grooves of Φ10 mm are opened in parallel on the surface, the size of the through grooves matches the fuel core block, and circular through holes are opened through the through grooves; a metal substrate 2 is installed on the top of the sponge suction cup 1, and the metal substrate 2 is a perforated flat plate, and a through hole corresponding to the position, diameter and number of the through holes on the sponge suction cup 1 is opened on the surface; a metal cover plate 3 is installed on the top of the metal substrate 2 The metal cover plate 3 is a cover plate 3, and semicircular air flow channels are opened on the folded edges around the metal cover plate 3 to ensure that the through holes on the metal substrate 2 corresponding to the folded edges can be ventilated normally, and the metal substrate 2 and the metal cover plate 3 are connected by screws. The metal cover plate 3 is a cube structure with an opening at the bottom, and a square chamber is formed after being combined with the metal substrate 2, which can be used as a buffer chamber to ensure that the negative pressure is evenly distributed in the through holes of the metal substrate 2. A vacuum tube connection port 4 is opened on the top of the metal cover plate 3, which can be connected to a vacuum tube to provide negative pressure for the suction cup.

[0022] The implementation principle of a combined vacuum suction cup of this embodiment is as follows: when it is necessary to suck and move the fuel pellets, first install the metal substrate 2 above the sponge suction cup 1, and the through holes on the sponge suction cup 1 correspond to the through holes on the surface of the metal substrate 2 one by one. Then, the metal cover plate 3 is installed above the metal substrate 2 by screws, and then the vacuum tube is connected to the vacuum tube connection port 4 on the surface of the metal cover plate. At this time, the vacuum suction cup is assembled. Then, the fuel pellets are arranged in a row, the vacuum tube is turned on, and negative pressure is formed in the suction cup to complete the suction of the fuel pellets. After use, the screws can be removed to clean up the fuel pellet fragments in the square chamber between the metal substrate 2 and the metal cover plate 3.

[0023] In the description of the present invention, it should be noted that the terms "left end", "right end", "above", "below", "outside", "inside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They 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. Therefore, they cannot be understood as limitations on the present invention.

[0024] Furthermore, the terms “first”, “second”, and “third” are used for descriptive purposes only and should not be understood as indicating or implying relative importance.

[0025] The above-mentioned embodiment only expresses one implementation method of the utility model, and its description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A combined vacuum suction cup, characterized in that: include: A sponge suction cup (1), a metal substrate (2) and a metal cover plate (3); the sponge suction cup (1) is provided with a plurality of semicircular through grooves in parallel, the size of which matches that of a fuel core block, and a circular through hole is provided through the through groove; the top of the sponge suction cup (1) is mounted with a metal substrate (2), and the surface of the metal substrate (2) is provided with through holes corresponding to the position and number of the sponge suction cup (1); the metal cover plate (3) is mounted above the metal substrate (2), the metal cover plate (3) is a cube structure with an opening at the bottom, and forms a square chamber after being combined with the metal substrate (2), and the top of the metal cover plate (3) is provided with a vacuum tube connection port (4).

2. A combined vacuum suction cup according to claim 1, characterized in that: The size of the semicircular through groove is Φ10 mm, and the through holes thereon are distributed in a matrix.

3. The combined vacuum suction cup according to claim 1, characterized in that: The sponge suction cup (1) is made of EDPM sponge.

4. The combined vacuum suction cup according to claim 1, characterized in that: The metal substrate (2) is a perforated flat plate, and the through holes on its surface have the same diameter as the through holes on the surface of the sponge suction cup (1).

5. The combined vacuum suction cup according to claim 1, characterized in that: The metal base plate (2) and the metal cover plate (3) are connected by screws.

6. The combined vacuum suction cup according to claim 1, characterized in that: Semicircular airflow channels are provided on the folded edges around the metal cover plate (3), so as to ensure that the through holes on the metal base plate (2) corresponding to the folded edges can be ventilated normally.

7. The combined vacuum suction cup according to claim 1, characterized in that: The square chamber can serve as a buffer chamber to ensure that the negative pressure is evenly distributed in each through hole of the metal substrate (2).

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