Sealing structure of filling machine

Abstract

The utility model relates to the technical field of filling machine sealing, and discloses a filling machine sealing structure which comprises a material storage tank and a sealing cover movably installed at the upper end of the material storage tank, in the initial state, the sealing cover is pulled upwards to the upper end of the material storage tank under the action of a first spring, at the moment, the sealing cover can be pulled downwards, and the material storage tank is sealed. The sealing cover moves downwards to stretch the telescopic rod and the first spring at the same time, when the sealing cover moves downwards, the multiple clamping assemblies on the side face are driven to move downwards at the same time, and when the clamping assemblies move, the clamping assemblies make contact with clamping blocks at the lower ends and are clamped and fixed together in a matched mode. The sealing cover can be automatically fixed under the cooperation of the clamping assembly and the clamping block, when the sealing cover needs to be opened, limiting between the clamping assembly and the clamping block is canceled, and the sealing cover can be automatically pulled back upwards under the action of the first spring; according to the sealing structure of the filling machine, sealing of the upper end of the storage tank can be automatically completed by pulling the sealing cover downwards to a certain distance, and operation is easy.

Description

Technical Field

[0001] This utility model relates to the field of filling machine sealing technology, specifically a filling machine sealing structure. Background Technology

[0002] Filling machines are a small category of packaging machines. From the perspective of packaging materials, they can be divided into liquid filling machines, paste filling machines, powder filling machines, and granule filling machines. According to the filling principle, filling machines can be divided into atmospheric pressure filling machines, pressure filling machines, liquid filling machines, oil filling machines, paste filling machines, sauce filling machines, granule / slurry filling machines, powder filling machines, large-barrel water filling machines, and vacuum filling machines. When using a filling machine, it is necessary to ensure the airtightness of the device to prevent foreign matter from entering the device.

[0003] A sealing structure for a filling machine, such as the one described in announcement number CN221394979U, includes a cover plate movably mounted on the upper part of a storage bin. A retaining platform is located below the cover plate, and a sealing ring is movably mounted on the outside of the retaining platform. A fastening structure is located on the upper part of the cover plate. This sealing structure utilizes a knob, screw, connecting frame, and retaining platform. Rotating the knob lifts the screw and connecting frame, with the sealing ring located on the upper part of the connecting frame. The retaining platform is frustum-shaped. As the connecting frame lifts the sealing ring, the sealing ring is continuously compressed against the outer wall of the retaining platform, resulting in a tighter fit between the sealing ring and the platform. This ensures a better seal between the sealing ring and the inner wall of the storage bin. The sealing ring has a T-shaped cross-section, allowing the upper part and inner wall of the storage bin to fit against the sealing ring when the cover plate is placed on top, thus improving the seal between the cover plate and the storage bin.

[0004] The aforementioned patent can improve the sealing between the cover plate and the storage tank. However, the use of threaded connection to achieve a sealing effect by fitting the storage tank and the cover plate together is problematic because the friction during rotation is relatively large. This can easily cause the sealing ring to move and twist, resulting in poor sealing performance. Threaded connection is also prone to stripping during frequent opening and closing, leading to a shorter service life.

[0005] Therefore, we propose a sealing structure for a filling machine to address the problems mentioned above. Utility Model Content

[0006] The purpose of this utility model is to provide a sealing structure for a filling machine to solve the problems mentioned in the background art, which are that the use of threaded connection to achieve a sealing effect between the storage tank and the cover plate is prone to causing the sealing ring to move due to the large friction during rotation, resulting in the sealing ring being twisted and the sealing performance deteriorating. The threaded connection is also prone to stripping during frequent opening and closing, resulting in a short service life.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a sealing structure for a filling machine, comprising a storage tank and a sealing cover movably mounted on the upper end of the storage tank. A fixing ring is fixedly mounted on the side wall of the storage tank, a connecting block is fixedly mounted on the fixing ring, a connecting rod is fixedly mounted on the upper end of the connecting block, a connecting plate is fixedly mounted on one end of the connecting rod, a telescopic tube is fixedly mounted on the lower end of the connecting plate, the lower end of the telescopic tube is fixedly mounted on the sealing cover, a spring is fixedly mounted between the sealing cover and the connecting plate, a plurality of locking blocks are fixedly mounted at equal intervals on the fixing ring, and a plurality of snap-fit ​​components are fixedly mounted at equal intervals on the side wall of the sealing cover. The locking blocks and the snap-fit ​​components cooperate to complete the fixation between the storage tank and the sealing cover.

[0008] Preferably, the snap-fit ​​assembly includes a fixing block fixedly installed on the side wall of the fixing ring, each fixing block having a sliding groove, each sliding groove having a slider slidably connected therein, and a spring being fixedly installed between the side wall of the slider and the side wall of the sliding groove.

[0009] Preferably, a connecting plate is fixedly installed on the side wall of the slider, a pull ring is fixedly installed on the side wall of the connecting plate, and a retaining tooth is fixedly installed on the lower side wall of the connecting plate.

[0010] Preferably, the sidewall of the card block is provided with a plurality of card slots at equal intervals, and the card teeth engage in the card slots.

[0011] Preferably, an airbag is fixedly installed inside the fixed ring, an opening is provided on the upper inner wall of the fixed ring, and a movable block is slidably connected between the fixed ring and the side wall of the storage tank, with a hollow washer provided on the movable block.

[0012] Preferably, the inner wall of the storage tank is provided with a slot, a telescopic ring is fixedly installed in the slot, a spring is fixedly installed between the inner wall of the telescopic ring and the lower wall of the slot, and an L-shaped connecting block is fixedly installed between the movable block and the telescopic ring, with one side of the L-shaped connecting block slidably connected in the slot.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1. In the initial state, the sealing cap is pulled upward to the top of the storage tank by the action of spring one. At this time, the sealing cap can be pulled downward. The downward movement of the sealing cap stretches the telescopic rod and spring one at the same time. When the sealing cap moves downward, it drives multiple snap-fit ​​components on the side to move downward at the same time. When the snap-fit ​​components move, they contact and cooperate with the snap-fit ​​block at the lower end to lock together. With the cooperation between the snap-fit ​​components and the snap-fit ​​block, the sealing cap can be automatically fixed. When it is necessary to open the sealing cap, the limit between the snap-fit ​​components and the snap-fit ​​block is released, and the sealing cap can be automatically pulled upward under the action of spring one. The sealing structure of this filling machine can automatically seal the top of the storage tank by pulling the sealing cap downward to a certain distance. The operation is simple.

[0015] 2. With the cooperation of the storage tank, slot, telescopic ring, spring 3, sealing cover, fixing ring, airbag, opening, movable block, L-shaped connecting block, hollow washer, fixing block, slide groove 1, slider, spring 2, connecting plate 2, pull ring and locking teeth, the locking teeth and slot cooperate as the sealing cover moves downward. The further down the sealing cover is pulled, the tighter it fits against the storage tank. When the sealing cover is pressed down, the airbag and hollow washer deform, filling the gap at the lower end of the sealing cover, resulting in good sealing performance. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the overall cross-sectional structure of this utility model;

[0018] Figure 3 For the present utility model Figure 2 Enlarged structural diagram at point A in the middle;

[0019] Figure 4 For the present utility model Figure 2 Enlarged structural diagram at point B in the middle.

[0020] In the diagram: 1. Storage tank; 11. Slot; 12. Telescopic ring; 13. Spring 3; 2. Sealing cover; 3. Fixing ring; 31. Airbag; 32. Opening; 33. Movable block; 34. L-shaped connecting block; 4. Connecting block; 41. Connecting rod; 42. Connecting plate 1; 43. Telescopic tube; 44. Spring 1; 5. Locking block; 51. Locking groove; 6. Hollow washer; 7. Locking assembly; 71. Fixing block; 72. Slide groove 1; 73. Sliding block; 74. Spring 2; 75. Connecting plate 2; 76. Pull ring; 77. Locking tooth. Detailed Implementation

[0021] 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.

[0022] Example 1: Please refer to Figure 1 - Figure 3 A sealing structure for a filling machine includes a storage tank 1 and a sealing cover 2 movably mounted on the upper end of the storage tank 1. A fixing ring 3 is fixedly mounted on the side wall of the storage tank 1. A connecting block 4 is fixedly mounted on the fixing ring 3. A connecting rod 41 is fixedly mounted on the upper end of the connecting block 4. A connecting plate 42 is fixedly mounted on one end of the connecting rod 41. A telescopic tube 43 is fixedly mounted on the lower end of the connecting plate 42. The lower end of the telescopic tube 43 is fixedly mounted on the sealing cover 2. A spring 44 is fixedly mounted between the sealing cover 2 and the connecting plate 42. Several locking blocks 5 are fixedly mounted at equal intervals on the fixing ring 3. Several snap-fit ​​components 7 are fixedly mounted at equal intervals on the side wall of the sealing cover 2. The locking blocks 5 and the snap-fit ​​components 7 cooperate to fix the storage tank 1 and the sealing cover 2.

[0023] In this embodiment: When sealing the storage tank 1, in the initial state, the sealing cover 2 is pulled upward to the upper end of the storage tank 1 under the action of spring 44. At this time, the sealing cover 2 can be pulled downward. The downward movement of the sealing cover 2 stretches the telescopic rod 43 and spring 44 at the same time. When the sealing cover 2 moves downward, it drives the multiple snap-fit ​​components 7 on the side to move downward at the same time. When the snap-fit ​​components 7 move, they contact and cooperate with the snap-fit ​​block 5 at the lower end to snap and fix together. With the cooperation between the snap-fit ​​components 7 and the snap-fit ​​block 5, the sealing cover 2 can be automatically fixed. When it is necessary to open the sealing cover 2, the limit between the snap-fit ​​components 7 and the snap-fit ​​block 5 is released, and the sealing cover 2 can be automatically pulled upward under the action of spring 44. This filling machine sealing structure can automatically seal the upper end of the storage tank 1 by pulling the sealing cover 2 downward to a certain distance. The operation is simple.

[0024] Example 2: This example is an improvement on Example 1. For details, please refer to [link / reference]. Figure 2 - Figure 4 The snap-fit ​​assembly 7 includes a fixing block 71 fixedly installed on the side wall of the fixing ring 3. Each fixing block 71 has a sliding groove 72. Each sliding groove 72 is slidably connected to a slider 73. A spring 74 is fixedly installed between the side wall of the slider 73 and the side wall of the sliding groove 72. In its natural state, the spring 74 pulls the slider 73 until it is completely retracted inside the sliding groove 72.

[0025] A connecting plate 75 is fixedly installed on the side wall of the slider 73, a pull ring 76 is fixedly installed on the side wall of the connecting plate 75, and a locking tooth 77 is fixedly installed on the lower side wall of the connecting plate 75, so that the connecting plate 75 can be pulled outward through the pull ring 76.

[0026] The side wall of the card block 5 is provided with several card slots 51 at equal intervals, and the card teeth 77 are engaged in the card slots 51. The number of card teeth 77 is less than the number of card slots 51, so that the device can be sealed more and more tightly as it moves downward continuously.

[0027] An airbag 31 is fixedly installed inside the fixed ring 3. An opening 32 is provided on the upper inner wall of the fixed ring 3. A movable block 33 is slidably connected between the fixed ring 3 and the side wall of the storage tank 1. A hollow washer 6 is provided on the movable block 33. When the airbag 31 is squeezed, it will extend outward from the opening 32 to cover the gap between the sealing cover 2 and the hollow washer 6.

[0028] The inner wall of the storage tank 1 has a slot 11, and a telescopic ring 12 is fixedly installed in the slot 11. A spring 33 is fixedly installed between the inner wall of the telescopic ring 12 and the lower wall of the slot 11. An L-shaped connecting block 34 is fixedly installed between the movable block 33 and the telescopic ring 12. One side of the L-shaped connecting block 34 is slidably connected in the slot 11. Under the action of the airbag 31 and the spring 33, the upper end of the movable block 33 is flush with the upper wall of the fixed ring 3.

[0029] In this embodiment: when the sealing cover 2 is pulled down, the sealing cover moves the snap-fit ​​assembly 7 down together. When the snap-fit ​​tooth 77 contacts the side wall of the snap-fit ​​block 5, the sealing cover 2 is pulled down further. At this time, the snap-fit ​​tooth 77 is squeezed by the side wall of the snap-fit ​​block 5, and the connecting plate 75 and the snap-fit ​​tooth 77 move outward a small distance simultaneously through the spring 74. Then, it is pulled back under the action of the spring 74. During the continuous downward movement, the snap-fit ​​tooth 77 cooperates with the snap-fit ​​groove 51. The further down the sealing cover 2 is pulled, the tighter it fits with the storage tank 1.

[0030] When the sealing cover 2 moves downward, its lower wall contacts the hollow gasket 6 at the lower end. The sealing cover 2 continues to move downward, squeezing the hollow gasket 6 and causing it to deform. During the movement, it pushes the movable block 33 downward. The movable block 33 moves downward, causing the L-shaped connecting block 34 at the lower end to move downward and squeeze the airbag 31 at the lower end. The airbag 31 is squeezed outward from the opening 32 at one end. Since there is a certain gap between the sealing cover 2 and the fixing ring 3, the gap at the lower end of the sealing cover 2 is filled by the cooperation between the deformed hollow gasket 6 and the expanded airbag 31. The airtightness is good. When the airbag 31 is squeezed, the telescopic ring 12 and the spring 3 13 at the lower end are squeezed downward along the slot 11. When the sealing cover 2 is pressed down, the airbag 31 and the hollow gasket 6 are deformed, filling the gap at the connection at the lower end of the sealing cover 2. The sealing performance is good.

[0031] The contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0032] Although the present invention 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 invention should be included within the protection scope of the present invention.

Claims

1. A sealing structure for a filling machine, comprising a storage tank (1) and a sealing cover (2) movably mounted on the upper end of the storage tank (1), characterized in that: A fixing ring (3) is fixedly installed on the side wall of the storage tank (1). A connecting block (4) is fixedly installed on the fixing ring (3). A connecting rod (41) is fixedly installed on the upper end of the connecting block (4). A connecting plate (42) is fixedly installed on one end of the connecting rod (41). A telescopic tube (43) is fixedly installed on the lower end of the connecting plate (42). The lower end of the telescopic tube (43) is fixedly installed on the sealing cover (2). A spring (44) is fixedly installed between the sealing cover (2) and the connecting plate (42). Several locking blocks (5) are fixedly installed at equal intervals on the fixing ring (3). Several snap-fit ​​components (7) are fixedly installed at equal intervals on the side wall of the sealing cover (2). The locking blocks (5) and the snap-fit ​​components (7) cooperate to fix the storage tank (1) and the sealing cover (2).

2. The sealing structure of a filling machine according to claim 1, characterized in that: The snap-fit ​​assembly (7) includes a fixing block (71) fixedly installed on the side wall of the fixing ring (3). Each fixing block (71) has a sliding groove (72) in it. Each sliding groove (72) has a slider (73) slidably connected in it. A spring (74) is fixedly installed between the side wall of the slider (73) and the side wall of the sliding groove (72).

3. The sealing structure of a filling machine according to claim 2, characterized in that: A connecting plate two (75) is fixedly installed on the side wall of the slider (73), a pull ring (76) is fixedly installed on the side wall of the connecting plate two (75), and a locking tooth (77) is fixedly installed on the lower side wall of the connecting plate two (75).

4. The sealing structure of a filling machine according to claim 3, characterized in that: The side wall of the card block (5) is provided with several card slots (51) at equal intervals, and the card teeth (77) are engaged in the card slots (51).

5. The sealing structure of a filling machine according to claim 4, characterized in that: An airbag (31) is fixedly installed inside the fixed ring (3). An opening (32) is opened on the upper inner wall of the fixed ring (3). A movable block (33) is slidably connected between the fixed ring (3) and the side wall of the storage tank (1). A hollow washer (6) is provided on the movable block (33).

6. The sealing structure of a filling machine according to claim 5, characterized in that: The storage tank (1) has a slot (11) on its inner wall. A telescopic ring (12) is fixedly installed in the slot (11). A spring (13) is fixedly installed between the inner wall of the telescopic ring (12) and the lower wall of the slot (11). An L-shaped connecting block (34) is fixedly installed between the movable block (33) and the telescopic ring (12). One side of the L-shaped connecting block (34) is slidably connected in the slot (11).

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