Switch valve for automatic sealing

Abstract

The utility model discloses a switch valve capable of automatically sealing glue, comprising: a driving cylinder, a glue feeding block arranged below the driving cylinder, a piston rod movable in the vertical direction, and a glue sealing head installed at the lower end of the piston rod, a piston disc is provided on the outer sealing sleeve of the upper end of the vertically arranged piston rod, the outer surface of the piston disc movable up and down in the driving cylinder is sealed with the inner wall of the driving cylinder, a first air pipe joint connected with the inside of the driving cylinder is provided on the side wall of the driving cylinder and above the piston disc, a spring in a compressed state is provided between the lower surface of the piston disc and the inner wall at the bottom of the driving cylinder, a protrusion extending vertically upward is provided on the inner wall at the bottom of the driving cylinder, and the lower part of the spring is sleeved on the protrusion. The utility model can drive the piston rod equipped with the piston disc to drive the glue sealing head to move up and seal the glue outlet gap through the spring in the case of power failure or gas failure to avoid glue liquid overflow and waste and damage to the product.

Description

Technical Field

[0001] The utility model relates to the technical field of glue dispensing, in particular to a switch valve capable of automatically sealing glue. Background Art

[0002] Glue dispensing machine, also known as glue coating machine, glue dripping machine, glue spraying machine, etc., is an automated machine that specifically controls fluids and drips or applies fluids on the surface or inside of products. Glue dispensing machines usually use switch valves to control the dispensing and stopping of glue.

[0003] When the on-off valve in the prior art realizes the on-off of glue, it usually has only one air circuit to control the up and down movement of the piston. However, in the event of a power outage or air failure, the piston rod loses power and cannot move, which may easily cause glue liquid to overflow and be wasted, damage the product, and cannot ensure the stability of the glue outlet gap size, which may easily affect the stability and consistency of the glue outlet flow rate. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide an on-off valve capable of automatically sealing glue. In the case of power failure or gas failure, the on-off valve capable of automatically sealing glue can, through a spring, drive a piston rod equipped with a piston disk to drive a sealing head to move up and seal the glue outlet gap to avoid glue liquid overflow and waste, thereby damaging the product.

[0005] In order to solve the above technical problems, the technical solution adopted by the utility model is: a switch valve capable of automatic glue sealing, comprising: a driving cylinder body, a glue feeding block arranged below the driving cylinder body, a piston rod movable in the vertical direction and a glue sealing head installed at the lower end of the piston rod, a glue feeding port is provided on the side wall of the glue feeding block, a glue outlet is provided on the lower surface of the glue feeding block, the glue feeding port and the glue outlet are connected through a glue feeding flow channel horizontally provided in the glue feeding block and a glue outlet flow channel vertically provided in the glue feeding block, a sealing portion of the glue sealing head is located below the glue outlet, a connecting rod portion of the glue sealing head extends upward into the glue outlet flow channel and is connected to the piston rod, when the glue sealing head moves to a high position with the piston rod, its sealing portion is sealed with the glue outlet, and when the glue sealing head moves to a low position with the piston rod, a glue outlet gap is formed between its sealing portion and the glue outlet;

[0006] A piston disk is sealed on the outer side of the upper end of the vertically arranged piston rod. The outer side surface of the piston disk that can move up and down in the driving cylinder body is sealed and matched with the inner wall of the driving cylinder body. A first air pipe joint connected to the inside of the driving cylinder body is installed on the side wall of the driving cylinder body and above the piston disk. A spring in a compressed state is arranged between the lower surface of the piston disk and the inner wall of the bottom of the driving cylinder body. The inner wall of the bottom of the driving cylinder body has a protrusion extending vertically upward, and the lower part of the spring is sleeved on the protrusion.

[0007] The further improved scheme in the above technical scheme is as follows:

[0008] 1. In the above solution, a through hole is formed on the raised portion, and the piston rod passes through the through hole and is sealed with the inner wall of the through hole through a sealing ring.

[0009] 2. In the above solution, a second air pipe joint communicating with the interior of the driving cylinder is installed on the side wall of the driving cylinder and below the piston disc.

[0010] 3. In the above solution, a sealing assembly is provided between the piston rod and the glue feeding block and above the glue feeding channel.

[0011] 4. In the above solution, the piston rod and the bottom of the drive cylinder are sealed.

[0012] 5. In the above solution, a sealing ring is installed at the lower end of the glue outlet channel, and the inner diameter of the sealing ring is smaller than the outer diameter of the blocking part.

[0013] 6. In the above scheme, the upper surface of the sealing part on the sealing head is set to a conical surface, and the conical surface is inclined downward in the radial outward direction. The inner ring of the lower end of the sealing ring is provided with a chamfered surface. When the piston rod is at the uppermost end of the stroke, the conical surface on the sealing part fits tightly with the chamfered surface on the sealing ring.

[0014] Due to the application of the above technical solution, the utility model has the following advantages compared with the prior art:

[0015] The utility model discloses an on-off valve capable of automatically sealing glue, wherein the sealing part of the sealing head is located below the glue outlet, the connecting rod part of the sealing head extends upward into the glue outlet flow channel and is connected to the piston rod, when the sealing head moves to a high position with the piston rod, the sealing part is sealed with the glue outlet, and when the sealing head moves to a low position with the piston rod, a glue outlet gap is formed between the sealing part and the glue outlet, a piston disc is provided on the outer sealing sleeve of the upper end of the vertically arranged piston rod, and the outer surface of the piston disc which can move up and down in the driving cylinder body is in contact with the inner wall of the driving cylinder body Sealed, a first air pipe joint connected to the inside of the driving cylinder is installed on the side wall of the driving cylinder and above the piston disk. A spring in a compressed state is arranged between the lower surface of the piston disk and the inner wall of the bottom of the driving cylinder. The inner wall of the bottom of the driving cylinder is provided with a protrusion extending vertically upward. The lower part of the spring is mounted on the protrusion. In the case of power failure or gas failure, the spring can drive the piston rod equipped with the piston disk to drive the sealing head to move up and seal the glue outlet gap to avoid glue overflow and waste and damage to the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Attached Figure 1 This is a schematic diagram of the structure of the switch valve capable of automatically sealing glue according to the utility model;

[0017] Attached Figure 2 For the utility model Figure 1 Schematic diagram of the cross section along AA;

[0018] Attached Figure 3 For the utility model Figure 2 A magnified schematic diagram of point B in the middle.

[0019] In the above drawings: 1. driving cylinder; 2. glue feeding block; 3. piston rod; 31. piston disc; 4. glue sealing head; 41. sealing part; 42. connecting rod part; 51. glue inlet; 52. glue outlet; 61. glue inlet flow channel; 62. glue outlet flow channel; 7. sealing assembly; 8. spring; 9. raised part; 10. through hole; 11. sealing ring; 12. conical surface; 13. chamfered surface; 141. first air pipe joint; 142. second air pipe joint. DETAILED DESCRIPTION

[0020] The present invention can be further understood through the specific embodiments given below, but they are not intended to limit the present invention.

[0021] Embodiment 1: An on-off valve capable of automatic glue sealing, comprising: a driving cylinder 1, a glue feeding block 2 disposed below the driving cylinder 1, a piston rod 3 movable in the vertical direction, and a glue sealing head 4 installed at the lower end of the piston rod 3, wherein a glue feeding port 51 is provided on the side wall of the glue feeding block 2, a glue outlet 52 is provided on the lower surface of the glue feeding block 2, and a glue feeding channel 61 horizontally provided in the glue feeding block 2 and a glue sealing head 4 installed at the lower end of the piston rod 3 are connected between the glue feeding port 51 and the glue outlet 52. The glue outlet channel 62 opened in the glue inlet block 2 is connected, the sealing portion 41 of the sealing head 4 is located below the glue outlet 52, and the connecting rod portion 42 of the sealing head 4 extends upward into the glue outlet channel 62 and is connected to the piston rod 3. When the sealing head 4 moves to a high position with the piston rod 3, the sealing portion 41 thereof is sealed with the glue outlet 52. When the sealing head 4 moves to a low position with the piston rod 3, a glue outlet gap is formed between the sealing portion 41 thereof and the glue outlet 52.

[0022] When glue supply is needed, the piston rod is driven downward by gas-driven piston disc, and then the glue sealing head is driven downward, so that a glue outlet gap is formed between the sealing part of the glue sealing head and the glue outlet, so that the glue liquid entering from the glue inlet is discharged outward through the glue inlet flow channel and the glue outlet flow channel in sequence;

[0023] A piston plate 31 is sealed on the outer side of the upper end of the vertically arranged piston rod 3. The outer side surface of the piston plate 31 that can move up and down in the driving cylinder body 1 is sealed with the inner wall of the driving cylinder body 1. A first air pipe joint 141 that is connected to the inside of the driving cylinder body 1 is installed on the side wall of the driving cylinder body 1 and above the piston plate 31. A spring 27 in a compressed state is arranged between the lower surface of the piston plate 31 and the inner wall of the bottom of the driving cylinder body 1. The inner wall of the bottom of the driving cylinder body 1 has a protrusion 28 that extends vertically upward, and the lower part of the spring 27 is sleeved on the protrusion 28;

[0024] When the processing equipment suddenly loses power or gas, the piston disk drives the piston rod upward under the force of the spring until the sealing head installed on the piston rod seals the glue outlet gap, preventing glue from overflowing and causing waste and damage to the product.

[0025] The protruding portion 28 is provided with a through hole 10 , and the piston rod 3 passes through the through hole 10 and is sealed with the inner wall of the through hole 10 via a sealing ring.

[0026] A second air pipe joint 142 communicating with the interior of the driving cylinder 1 is installed on the side wall of the driving cylinder 1 and below the piston plate 31 .

[0027] A sealing assembly 7 is disposed between the piston rod 3 and the glue feeding block 2 and above the glue feeding channel 61 .

[0028] The piston rod 3 and the bottom of the driving cylinder body 1 are sealed together.

[0029] A sealing ring 11 is installed at the lower end of the glue outlet channel 62 . The inner diameter of the sealing ring 11 is smaller than the outer diameter of the blocking portion 41 .

[0030] Embodiment 2: An on-off valve capable of automatic glue sealing, comprising: a driving cylinder 1, a glue feeding block 2 disposed below the driving cylinder 1, a piston rod 3 movable in the vertical direction, and a glue sealing head 4 installed at the lower end of the piston rod 3, wherein a glue feeding port 51 is provided on the side wall of the glue feeding block 2, a glue outlet 52 is provided on the lower surface of the glue feeding block 2, and a glue feeding channel 61 horizontally provided in the glue feeding block 2 and a glue sealing head 4 installed at the lower end of the piston rod 3 are connected between the glue feeding port 51 and the glue outlet 52. The glue outlet channel 62 opened in the glue inlet block 2 is connected, the sealing portion 41 of the sealing head 4 is located below the glue outlet 52, and the connecting rod portion 42 of the sealing head 4 extends upward into the glue outlet channel 62 and is connected to the piston rod 3. When the sealing head 4 moves to a high position with the piston rod 3, the sealing portion 41 thereof is sealed with the glue outlet 52. When the sealing head 4 moves to a low position with the piston rod 3, a glue outlet gap is formed between the sealing portion 41 thereof and the glue outlet 52.

[0031] When in the cut-off state, the sealing head is at the uppermost end of the stroke driven by the piston rod. At this time, the sealing part cooperates with the glue outlet to seal and block the glue outlet flow channel to achieve the cut-off of the glue liquid.

[0032] The upper end of the piston rod 3 is connected to a piston disc 31 arranged in the driving cavity of the driving cylinder body 1. A spring 27 in a compressed state is arranged between the lower surface of the piston disc 31 and the inner wall of the bottom of the driving cylinder body 1. The inner wall of the bottom of the driving cylinder body 1 has a protrusion 28 extending vertically upward, and the lower part of the spring 27 is mounted on the protrusion 28.

[0033] The protrusion 28 is provided with a through hole 10, through which the piston rod 3 passes and is sealed with the inner wall of the through hole 10 through a sealing ring.

[0034] A sealing ring 11 is installed at the lower end of the glue outlet channel 62 . The inner diameter of the sealing ring 11 is smaller than the outer diameter of the blocking portion 41 .

[0035] The upper surface of the sealing portion 41 on the sealing head 4 is set as a conical surface 12, and the conical surface 12 is inclined downward in the radial outward direction. The inner ring of the lower end of the sealing ring 11 is provided with a chamfered surface 13. When the piston rod 3 is located at the uppermost end of the stroke, the conical surface 12 on the sealing portion 41 is tightly fitted with the chamfered surface 13 on the sealing ring 11.

[0036] The working principle of the utility model is as follows:

[0037] When in the cut-off state, the sealing head is at the uppermost end of the stroke driven by the piston rod. At this time, the sealing part cooperates with the glue outlet to seal and block the glue outlet flow channel to achieve the cut-off of the glue liquid.

[0038] When glue supply is needed, the piston rod is driven downward by gas-driven piston disc, and then the glue sealing head is driven downward, so that a glue outlet gap is formed between the sealing part of the glue sealing head and the glue outlet, so that the glue liquid entering from the glue inlet is discharged outward through the glue inlet flow channel and the glue outlet flow channel in sequence;

[0039] When the processing equipment suddenly loses power or gas, the piston disk drives the piston rod upward under the force of the spring until the sealing head installed on the piston rod seals the glue outlet gap, preventing glue from overflowing and causing waste and damage to the product.

[0040] When the above-mentioned automatic glue sealing switch valve is used, it can drive the piston rod equipped with a piston disk through a spring to drive the glue sealing head to move up and seal the glue outlet gap to avoid glue overflow and waste and damage to the product when the power is off or the gas is cut off.

[0041] The above embodiments are only for illustrating the technical concept and features of the utility model, and their purpose is to enable people familiar with the technology to understand the content of the utility model and implement it accordingly, and they cannot be used to limit the protection scope of the utility model. Any equivalent changes or modifications made according to the spirit of the utility model should be included in the protection scope of the utility model.

Claims

1. A switch valve capable of automatically sealing glue, comprising: A driving cylinder (1), a glue feeding block (2) arranged below the driving cylinder (1), a piston rod (3) movable in a vertical direction, and a glue sealing head (4) mounted on the lower end of the piston rod (3), wherein a glue feeding port (51) is provided on a side wall of the glue feeding block (2), a glue outlet (52) is provided on a lower surface of the glue feeding block (2), and a glue feeding channel (61) horizontally provided in the glue feeding block (2) and a glue outlet (62) vertically provided in the glue feeding block (2) are connected between the glue feeding port (51) and the glue outlet (52). 62), characterized in that: the sealing portion (41) of the sealing head (4) is located below the glue outlet (52), the connecting rod portion (42) of the sealing head (4) extends upward into the glue outlet channel (62) and is connected to the piston rod (3), when the sealing head (4) moves to a high position along with the piston rod (3), the sealing portion (41) thereof is in sealing cooperation with the glue outlet (52), and when the sealing head (4) moves to a low position along with the piston rod (3), a glue outlet gap is formed between the sealing portion (41) thereof and the glue outlet (52); A piston plate (31) is sealedly sleeved on the outer side of the upper end of the vertically arranged piston rod (3); the outer side surface of the piston plate (31) which can move up and down in the drive cylinder (1) is sealedly matched with the inner wall of the drive cylinder (1); a first air pipe joint (141) which is connected to the inside of the drive cylinder (1) is installed on the side wall of the drive cylinder (1) and above the piston plate (31); a spring (27) in a compressed state is arranged between the lower surface of the piston plate (31) and the inner wall of the bottom of the drive cylinder (1); a protrusion (28) extending vertically upward is provided on the inner wall of the bottom of the drive cylinder (1); and the lower part of the spring (27) is sleeved on the protrusion (28).

2. The automatic sealing switch valve according to claim 1, characterized in that: The raised portion (28) is provided with a through hole (10), and the piston rod (3) passes through the through hole (10) and is sealed with the inner wall of the through hole (10) via a sealing ring.

3. The automatic sealing switch valve according to claim 1, characterized in that: A second air pipe joint (142) connected to the interior of the drive cylinder (1) is installed on the side wall of the drive cylinder (1) and below the piston plate (31).

4. The automatic sealing switch valve according to claim 1, characterized in that: A sealing assembly (7) is provided between the piston rod (3) and the glue feeding block (2) and above the glue feeding channel (61).

5. The switch valve capable of automatic sealing according to claim 1, characterized in that: The piston rod (3) is in sealing cooperation with the bottom of the drive cylinder body (1).

6. The automatic sealing switch valve according to claim 1, characterized in that: A sealing ring (11) is installed at the lower end of the glue outlet channel (62), and the inner diameter of the sealing ring (11) is smaller than the outer diameter of the blocking portion (41).

7. The automatic glue-sealing switch valve according to claim 6, characterized in that: The upper surface of the sealing portion (41) on the sealing head (4) is arranged as a conical surface (12), and the conical surface (12) is inclined downward in a radially outward direction. The inner ring of the lower end of the sealing ring (11) is provided with a chamfered surface (13). When the piston rod (3) is located at the uppermost end of the stroke, the conical surface (12) on the sealing portion (41) and the chamfered surface (13) on the sealing ring (11) are tightly fitted.

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