Packing machine glue control valve with double sealing rings

Abstract

The utility model discloses a packaging machine glue control valve with double sealing rings, which belongs to the technical field of glue control valve sealing and comprises a valve body, an end cover, a glue outlet spray needle, a glue injection port and a piston cavity, the piston cavity is arranged at the upper end of the valve body, the end cover is mounted at a cavity opening of the piston cavity, the glue outlet spray needle is positioned at an opening at the lower end of the valve body, and the glue injection port is mounted at the lower part of the side wall of the valve body. The cavity opening of the piston cavity is sleeved with two sealing ring assemblies, and sealing is achieved through the double sealing ring assemblies. The sealing performance of the control valve is remarkably enhanced through the design of the double-sealing-ring assembly; the two independent sealing rings form double guarantees in the valve body, leakage of adhesive in the packaging process is effectively prevented, and therefore cleanliness of a production line and the quality of products are guaranteed. Due to the design of an annular seat and a glue overflowing groove of the double-sealing-ring assembly, waste caused by uneven extrusion is avoided; and meanwhile, the redundant adhesive is effectively collected and reused, so that the production cost is further reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of glue control valve sealing, in particular to a packaging machine glue control valve with double sealing rings. Background Art

[0002] The glue control valve of packaging machine is an important equipment component, which is widely used in various packaging machines, especially in the packaging process of liquid, paste, viscous materials and other products. Its main function is to ensure the accurate, uniform and stable supply of glue during the packaging process by accurately controlling the flow of glue.

[0003] After searching, it was found that the Chinese patent publication number CN218559357U disclosed a "A packaging machine glue control valve with double sealing rings", which includes a valve body and an end cover, a glue injection port is opened on one side of the bottom of the valve body, a glue outlet is opened on the bottom of the valve body, a glue cavity is arranged in the valve body, an air inlet is arranged on one side of the end cover, a piston cavity is arranged in the valve body, a piston assembly is arranged in the piston cavity, a spray needle is arranged at the bottom of the piston assembly, a sealing assembly is arranged between the spray needle and the piston cavity, and the sealing assembly is arranged on the inner wall of the piston cavity;

[0004] The double seal ring design is intended to improve sealing performance, but in actual operation, improper installation or aging of materials may lead to reduced sealing performance and glue overflow, which in turn affects product quality and equipment operation. The installation and maintenance of the double seal ring are relatively complicated. It is necessary to ensure that the two seal rings are correctly installed and fit tightly, which may be difficult in actual operation. In addition, its structural complexity also increases the difficulty of maintenance, requiring more time and labor costs. Utility Model Content

[0005] The main purpose of the utility model is to provide a packaging machine-controlled glue valve with double sealing rings, which can effectively solve the problems raised in the background technology.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0007] A packaging machine glue control valve with double sealing rings comprises a valve body, an end cover, a glue discharge nozzle, a glue injection port and a piston cavity. The upper end of the valve body is the piston cavity, the end cover is installed at the cavity opening of the piston cavity, the glue discharge nozzle is located at the lower end opening of the valve body, and the glue injection port is installed at the lower part of the side wall of the valve body.

[0008] Two sets of sealing ring assemblies are sleeved at the cavity opening of the piston cavity, and sealing is achieved through the double sealing ring assemblies;

[0009] Each group of the sealing ring assembly comprises an annular seat, a shrinking ring and a sealing ring. The annular seat is embedded in an annular groove in the piston chamber wall, and a limiting convex column is provided on the outer wall of the annular seat to prevent the annular seat from moving. Partition rings are provided on both sides of the inner wall of the annular seat, and an inner cavity is formed between the two partition rings. A shrinking ring for storing adhesive is fixed in the inner cavity, and a glue extrusion port is provided on the expansion arc surface of the shrinking ring. A sealing ring is provided on the inner sleeve of the annular seat and the shrinking ring, and a docking groove adapted to the shrinking ring and the partition ring is provided on the outer wall of the sealing ring. An overflow glue cavity is formed between the partition ring and the sealing ring, and the shrinking ring extrudes adhesive into the overflow glue cavity to be bonded and connected with the sealing ring, and collects excess adhesive.

[0010] As a further preferred embodiment of the utility model, the end cover is threadedly connected to the valve body, the end cover squeezes the sealing ring to release the adhesive in the shrink ring, and the outer wall of the sealing ring is tightly attached to the valve body;

[0011] As a further preferred embodiment of the present invention, a plurality of the limiting protrusions are distributed in an annular manner on the outer wall of the annular seat, two of the partition rings are symmetrically arranged on the inner wall of the annular seat, and the partition rings, the limiting protrusions and the annular seat are designed as one piece;

[0012] As a further preferred embodiment of the present invention, the shrink ring is composed of a rubber ring and a sponge ring, the sponge ring is inserted into the inner cavity of the rubber ring, the inner cavity of the rubber ring is injected with adhesive, the inner hole wall of the rubber ring is designed in an arc shape, and a plurality of the glue extrusion ports are distributed in an annular manner on the rubber ring;

[0013] As a further preferred embodiment of the present invention, the inner wall of the shrink ring is bonded and fixed to the annular seat, and the inner hole wall of the shrink ring is a wear-resistant surface;

[0014] As a further preferred embodiment of the present invention, another set of double sealing ring components is provided at the connection between the valve body and the glue discharge spray needle.

[0015] Compared with the prior art, the utility model has the following beneficial effects:

[0016] In the utility model, the double sealing ring assembly design significantly enhances the sealing performance of the control valve. Two independent sealing rings form a double protection inside the valve body, effectively preventing the leakage of adhesive during the packaging process, thereby ensuring the cleanliness of the production line and the quality of the product; the annular seat and overflow groove design of the double sealing ring assembly avoid waste caused by uneven extrusion. At the same time, excess adhesive is effectively collected and reused, further reducing production costs; the design of the double sealing ring assembly can adapt to the needs of different adhesives, whether it is viscosity, corrosiveness or temperature sensitivity, it can provide a stable sealing effect. This allows the control valve to perform excellently in a variety of application scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 This is a diagram showing the valve body, piston chamber and double sealing ring assembly of the utility model;

[0019] Figure 3 This is an exploded view of the sealing ring assembly of the utility model;

[0020] Figure 4 for Figure 3 Enlarged schematic diagram at point A in the middle.

[0021] In the figure: 1. valve body; 2. end cover; 3. glue discharge needle; 4. glue injection port; 5. piston chamber; 6. sealing ring assembly; 61. annular seat; 62. limiting boss; 63. partition ring; 64. inner cavity; 65. overflow glue cavity; 66. shrink ring; 67. glue extrusion port; 68. sealing ring; 69. docking groove. DETAILED DESCRIPTION

[0022] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0023] like Figure 1 - Figure 4 As shown, a packaging machine glue control valve with double sealing rings, the packaging machine glue control valve, which is characterized by a double sealing ring design, and the main components include a valve body 1, an end cover 2, a glue discharge needle 3, a glue injection port 4 and a piston chamber 5. The upper end of the valve body 1 constitutes the piston chamber 5, and the end cover 2 is installed at the cavity opening of the piston chamber 5 and is connected to the valve body 1 by a threaded manner. When the end cover 2 is installed, it squeezes the sealing ring 68, thereby releasing the adhesive in the shrink ring 66. The glue discharge needle 3 is located at the lower end opening of the valve body 1, and the glue injection port 4 is located at the lower part of the side wall of the valve body 1 for injecting glue.

[0024] Two sets of sealing ring assemblies 6 are specially designed at the cavity opening of the piston cavity 5, and these two sets of sealing ring assemblies 6 jointly realize the sealing function of the valve body 1. Each set of sealing ring assemblies 6 is composed of an annular seat 61, a shrink ring 66 and a sealing ring 68. The annular seat 61 is cleverly embedded in the annular groove of the cavity wall of the piston cavity 5, and its outer wall is provided with limiting bosses 62 for limiting. These limiting bosses 62 are distributed in an annular manner on the outer wall of the annular seat 61, effectively preventing the movement of the annular seat 61. Partition rings 63 are provided on both sides of the inner wall of the annular seat 61, and these two partition rings 63 are symmetrically arranged on the inner wall of the annular seat 61. The partition ring 63, the limiting boss 62 and the annular seat 61 adopt an integrated design to enhance the stability of the overall structure.

[0025] An inner cavity 64 is formed between the two partition rings 63, and a shrink ring 66 for storing adhesive is fixed in the inner cavity 64. The shrink ring 66 is composed of a rubber ring and a sponge ring, and the sponge ring is cleverly inserted into the inner cavity of the rubber ring. The inner cavity of the rubber ring is injected with adhesive, and its inner hole wall is designed to be arc-shaped. Multiple glue extrusion ports 67 are distributed in an annular manner on the rubber ring, so that the adhesive can be evenly extruded. The inner wall of the shrink ring 66 is fixed to the annular seat 61 by bonding, and its inner hole wall is made of wear-resistant material.

[0026] A glue extrusion port 67 is provided on the expansion arc surface of the shrink ring 66, so that the adhesive can be smoothly extruded. A sealing ring 68 is sleeved inside the annular seat 61 and the shrink ring 66, and the outer wall of the sealing ring 68 is tightly fitted to the valve body 1. It is worth mentioning that a docking groove 69 is provided on the outer wall of the sealing ring 68 to match the shrink ring 66 and the partition ring 63. This docking groove 69 not only enables the sealing ring 68 to fit tightly with the shrink ring 66 and the partition ring 63, but also forms an overflow glue cavity 65. When the shrink ring 66 squeezes out the adhesive, the adhesive will flow into the overflow glue cavity 65 and bond with the sealing ring 68, while collecting excess adhesive.

[0027] In addition, another set of double sealing ring components 6 is also provided at the connection between the valve body 1 and the glue discharge nozzle 3 to ensure the sealing performance of the entire glue control valve. This design not only improves the sealing and durability of the glue control valve, but also effectively prevents leakage and waste of adhesive.

[0028] Disassembly process: First, turn off the power of the packaging machine control valve, and ensure safety. Use a screwdriver or wrench to loosen the threaded connection between the end cover 2 and the valve body 1; gently remove the end cover 2 from the cavity of the piston cavity 5, and be careful not to damage the sealing ring assembly 6; use a tool to gently remove the old sealing ring 68 from the annular seat 61. If there is adhesive between the sealing ring 68 and the annular seat 61, it may be necessary to use an appropriate solvent or tool to separate them; similarly, remove the old shrink ring 66 from the inner wall of the annular seat 61; when installing the new sealing ring assembly 6, inject an appropriate amount of adhesive into the inner cavity of the new shrink ring 66; Fix the inner wall of the new shrink ring 66 to the annular seat 61 by bonding to ensure that they are tight and without gaps; put the new sealing ring 68 on the outside of the annular seat 61 and the shrink ring 66 to ensure that the outer wall of the sealing ring 68 fits tightly against the valve body 1; if necessary, fill a proper amount of adhesive into the docking groove 69 of the sealing ring 68 to ensure a tight fit between the sealing ring 68, the shrink ring 66 and the partition ring 63; reassemble the glue control valve, reinstall the end cover 2 on the cavity opening of the piston cavity 5, and tighten the threaded connection with a screwdriver or wrench; ensure that the end cover 2 does not squeeze or damage the new sealing ring assembly 6 during installation; check all connection parts to ensure good sealing and no leakage; after reinstalling the glue control valve, perform a functional test to ensure that the glue control valve works normally and has good sealing performance.

[0029] The double sealing ring assembly design of the utility model significantly enhances the sealing performance of the control valve. Two independent sealing rings form a double protection inside the valve body, effectively preventing leakage of adhesive during the packaging process, thereby ensuring the cleanliness of the production line and the quality of the product; the annular seat and overflow groove design of the double sealing ring assembly avoid waste caused by uneven extrusion. At the same time, excess adhesive is effectively collected and reused, further reducing production costs; the design of the double sealing ring assembly can adapt to the needs of different adhesives, whether it is viscosity, corrosiveness or temperature sensitivity, and can provide a stable sealing effect. This enables the control valve to perform excellently in a variety of application scenarios;

[0030] The above are the preferred embodiments of the utility model and the technical principles used therein. For those skilled in the art, without departing from the spirit and scope of the utility model, any obvious changes such as equivalent transformation, simple replacement, etc. based on the technical solution of the utility model shall fall within the protection scope of the utility model.

Claims

1. A packaging machine glue control valve with double sealing rings, comprising a valve body (1), an end cover (2), a glue discharge needle (3), a glue injection port (4) and a piston chamber (5), wherein the upper end of the valve body (1) is the piston chamber (5), the end cover (2) is installed at the cavity opening of the piston chamber (5), the glue discharge needle (3) is located at the lower end opening of the valve body (1), and the glue injection port (4) is installed at the lower part of the side wall of the valve body (1), characterized in that: Two sets of sealing ring assemblies (6) are sleeved at the cavity opening of the piston cavity (5), and sealing is achieved by the double sealing ring assemblies (6); Each group of the sealing ring assembly (6) comprises an annular seat (61), a shrinking ring (66) and a sealing ring (68); the annular seat (61) is embedded in an annular groove of the piston cavity (5) wall, and the outer wall of the annular seat (61) is provided with a limiting convex column (62) for limiting so as to prevent the annular seat (61) from moving; partition rings (63) are provided at both sides of the inner wall of the annular seat (61); an inner cavity (64) is formed between the two partition rings (63); a shrinking ring for storing adhesive is fixed in the cavity (64) (66), and a glue extrusion port (67) is provided on the expansion arc surface of the shrink ring (66), a sealing ring (68) is provided inside the annular seat (61) and the shrink ring (66), and a docking groove (69) adapted to the shrink ring (66) and the partition ring (63) is provided on the outer wall of the sealing ring (68), and a glue overflow cavity (65) is formed between the partition ring (63) and the sealing ring (68), and the shrink ring (66) squeezes out adhesive to flow into the glue overflow cavity (65) to be bonded and connected with the sealing ring (68), and collects excess adhesive.

2. The packaging machine glue control valve with double sealing rings according to claim 1, characterized in that: The end cover (2) is threadedly connected to the valve body (1); the end cover (2) squeezes the sealing ring (68) to release the adhesive in the shrink ring (66); and the outer wall of the sealing ring (68) is tightly attached to the valve body (1).

3. The packaging machine glue control valve with double sealing rings according to claim 2, characterized in that: A plurality of the limiting convex columns (62) are distributed in an annular shape on the outer wall of the annular seat (61), and the two partition rings (63) are symmetrically arranged on the inner wall of the annular seat (61), and the partition rings (63), the limiting convex columns (62) and the annular seat (61) are designed as an integral whole.

4. The packaging machine glue control valve with double sealing rings according to claim 3, characterized in that: The shrink ring (66) is composed of a rubber ring and a sponge ring. The sponge ring is inserted into the internal cavity of the rubber ring. The internal cavity of the rubber ring is injected with adhesive. The inner hole wall of the rubber ring is designed to be arc-shaped. Multiple glue extrusion ports (67) are distributed in an annular manner on the rubber ring.

5. The packaging machine glue control valve with double sealing rings according to claim 4, characterized in that: The inner wall of the shrink ring (66) is bonded and fixed to the annular seat (61), and the inner hole wall of the shrink ring (66) is a wear-resistant surface.

6. The packaging machine glue control valve with double sealing rings according to claim 5, characterized in that: Another set of double sealing ring components (6) is provided at the connection between the valve body (1) and the glue discharge spray needle (3).

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