Dispensing switch valve for high-viscosity colloid

Abstract

The utility model discloses a high-viscosity colloid dispensing switch valve which comprises a driving cylinder body, a colloid feeding block arranged below the driving cylinder body, a piston rod capable of moving in the vertical direction and a colloid sealing head installed at the lower end of the piston rod. The outer side of the piston rod is sleeved with an upper piston disc and a lower piston disc respectively, and a spring in a compressed state is arranged between the lower surface of the lower piston disc and the inner wall of the bottom of the driving cylinder body. A plurality of air inlet holes are formed in the side wall of the piston rod and located above the upper piston disc, and a first air outlet hole is formed in the side wall of the piston rod and located between the horizontal partition plate and the lower piston disc. According to the utility model, the glue solution can be prevented from overflowing and wasting and damaging products under the conditions of power failure and gas failure, the acting force of the spring can be overcome, and the stability of the size of the glue outlet gap is ensured, so that the stability and the consistency of the glue outlet flow are ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of glue dispensing, in particular to a glue dispensing switch valve for high-viscosity colloid. Background Art

[0002] Glue dispenser, also known as glue coating machine, glue dripping machine, glue spraying machine, etc., is an automated machine that controls fluid and drips or applies fluid on the surface or inside of a product. Glue dispenser usually uses a switch valve to control the dispensing and stopping of glue. When the switch valve of the prior art is used to switch glue, it usually has only one air path to control the up and down movement of the piston. However, in the case of power failure or gas failure, the piston rod loses power and cannot move, which easily leads to the waste of glue and damage to the product. In addition, the stability of the glue dispensing gap size cannot be guaranteed, which easily affects the stability and consistency of the glue dispensing flow rate. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a high-viscosity colloid dispensing switch valve, which can avoid glue liquid overflow and waste and damage to products in the case of power failure and gas failure, and can overcome the force of the spring to ensure the stability of the glue outlet gap size, thereby ensuring the stability and consistency of the glue outlet flow rate.

[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is: a high-viscosity colloid dispensing switch valve, 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 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;

[0005] A horizontal partition is arranged in the driving cylinder body, thereby dividing the driving cavity in the driving cylinder body into an upper cavity and a lower cavity. The upper end of the vertically arranged piston rod passes through the horizontal partition and extends into the upper cavity and is sealed with the horizontal partition. An upper piston disc located in the upper cavity and a lower piston disc located in the lower cavity are respectively mounted on the outer side of the piston rod. A spring in a compressed state is arranged between the lower surface of the lower piston disc and the inner wall of the bottom of the driving cylinder body. A first air pipe joint connected to the upper cavity is installed on the side wall of the driving cylinder body and above the upper piston disc. A plurality of radially inward air inlet holes are provided above the upper piston disk, a first radially inward air outlet hole is provided on the side wall of the piston rod and located between the horizontal partition and the lower piston disk, the air inlet hole and the first air outlet hole are connected by an air path vertically provided in the piston rod, a second air outlet hole is provided on the upper surface of the horizontal partition, a second air pipe joint is installed on the side wall of the drive cylinder body and located on the outer side of the horizontal partition, the second air pipe joint is connected to the second air outlet hole through a pipeline provided in the horizontal partition, and a third air outlet hole connected to the lower cavity is provided on the side wall of the lower part of the drive cylinder body.

[0006] The further improved scheme in the above technical scheme is as follows:

[0007] 1. In the above solution, a sealing ring is provided between the upper piston disc, the lower piston disc and the inner wall of the upper cavity, and the lower cavity respectively.

[0008] 2. In the above solution, the upper piston disc and the lower piston disc are each sleeved on the piston rod through two retaining springs and are sealed and connected to the outer surface of the piston rod.

[0009] 3. In the above solution, 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.

[0010] 4. 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.

[0011] Due to the application of the above technical solution, the utility model has the following advantages compared with the prior art:

[0012] The utility model discloses a high-viscosity glue dispensing switch valve, when the glue sealing head moves to a high position with the piston rod, its sealing part 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 the sealing part and the glue outlet, a horizontal partition is arranged in the driving cylinder body, so as to separate the driving cavity in the driving cylinder body into an upper cavity and a lower cavity, the upper end of the vertically arranged piston rod passes through the horizontal partition and extends into the upper cavity and is sealed with the horizontal partition, an upper piston disc located in the upper cavity and a lower piston disc located in the lower cavity are respectively mounted on the outer side of the piston rod, a spring in a compressed state is arranged between the lower surface of the lower piston disc and the inner wall of the bottom of the driving cylinder body, a first air pipe joint connected with the upper cavity is installed on the side wall of the driving cylinder body and above the upper piston disc, a plurality of radially inward air inlet holes are arranged on the side wall of the piston rod and above the upper piston disc, and the piston rod The air inlet of the piston is connected to the air path of the piston rod, and the air inlet is connected to the air path of the piston rod by the piston rod. The air inlet and the air path of the piston rod are connected to the air path of the piston rod. The air inlet and the air path of the piston rod are connected to the air path of the piston rod. The air inlet and the air path of the piston rod are connected to the air path of the piston rod. The air inlet and the air path of the piston rod are connected to the air path of the piston rod. The air inlet and the air path of the piston rod are connected to the air path of the piston rod. The air inlet and the air path of the piston rod are connected to the air path of the piston rod. The air inlet and the air path of the piston rod are connected to the air path of the piston rod. The air inlet and the air path of the piston rod are connected to the air path of the piston rod. The air inlet and the air path of the piston rod are connected to the air path of the piston rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Attached Figure 1 This is a structural schematic diagram of the dispensing switch valve for high-viscosity colloids of the utility model;

[0014] Attached Figure 2 For the utility model Figure 1 Schematic diagram of the cross section along AA;

[0015] Attached Figure 3 For the utility model Figure 1 Schematic diagram of the cross section along BB.

[0016] In the above drawings: 1. driving cylinder; 2. glue feeding block; 3. piston rod; 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. horizontal partition; 91. upper cavity; 92. lower cavity; 10. upper piston disc; 11. lower piston disc; 12. sealing ring; 131. first air pipe joint; 132. second air pipe joint; 141. air intake; 142. air path; 143. first air outlet; 151. second air outlet; 152. pipeline; 153. third air outlet; 16. spring; 17. raised part; 18. through hole; 19. retaining ring; 20. adjusting cap; 21. stop ring; 22. pull rod. DETAILED DESCRIPTION

[0017] The present invention can be further understood through the specific embodiments given below, but they are not intended to limit the present invention.

[0018] Embodiment 1: A high-viscosity glue dispensing switch valve, comprising: a driving cylinder 1, a glue feeding block 2 arranged 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, 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 vertical glue sealing head 4 are provided between the glue feeding port 51 and the glue outlet 52. The sealing head 4 is connected to the glue outlet channel 62 directly opened in the glue inlet block 2, 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 and matched 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.

[0019] A horizontal partition 8 is provided in the driving cylinder body 1, thereby dividing the driving cavity in the driving cylinder body 1 into an upper cavity 91 and a lower cavity 92. The upper end of the vertically arranged piston rod 3 passes through the horizontal partition 8 and extends into the upper cavity 91 and is sealed with the horizontal partition 8. The outer side of the piston rod 3 is respectively provided with an upper piston disc 10 located in the upper cavity 91 and a lower piston disc 11 located in the lower cavity 92. A spring 16 in a compressed state is provided between the lower surface of the lower piston disc 11 and the inner wall of the bottom of the driving cylinder body 1. A first air pipe joint 131 connected to the upper cavity 91 is installed on the side wall of the driving cylinder body 1 and located above the upper piston disc 10. The side wall of the piston rod 3 and the upper piston disc 10 are provided with a first air pipe joint 131 connected to the upper cavity 91. A plurality of radially inward air inlet holes 141 are provided above the piston rod 3, a radially inward first air outlet hole 143 is provided on the side wall of the piston rod 3 and located between the horizontal partition 8 and the lower piston plate 11, the air inlet hole 141 and the first air outlet hole 143 are communicated through an air path 142 vertically provided in the piston rod 3, a second air outlet hole 151 is provided on the upper surface of the horizontal partition 8, a second air pipe joint 132 is installed on the side wall of the drive cylinder body 1 and located outside the horizontal partition 8, the second air pipe joint 132 is communicated with the second air outlet hole 151 through a pipeline 152 provided in the horizontal partition 8, and a third air outlet hole 153 connected with the lower cavity 92 is provided on the side wall of the lower part of the drive cylinder body 1;

[0020] When dispensing operation is required, air is introduced into the driving cylinder from the first air pipe joint, and a part of the high-pressure gas acts on the upper surface of the upper piston disc to push the upper piston disc downward, and another part of the high-pressure gas acts on the upper surface of the lower piston disc after passing through the air inlet hole, the air path and the first air outlet hole in sequence, pushing the lower piston disc downward, so that the sealing head moves down to a low position along with the piston rod connected to the piston disc, and the glue discharge gap opens. The setting of the double piston discs can greatly increase the force of the piston disc when moving downward to overcome the action of the spring without increasing the air intake pressure, thereby ensuring the stability of the glue discharge gap size when the piston rod drives the sealing head to move to a low position, thereby ensuring the stability and consistency of the glue discharge flow rate.

[0021] A sealing ring 12 is disposed between the upper piston disc 10 , the lower piston disc 11 and the inner wall of the upper cavity 91 , the lower cavity 92 , respectively.

[0022] The upper piston disc 10 and the lower piston disc 11 are each sleeved on the piston rod 3 through two retaining springs 19 and are sealedly connected to the outer surface of the piston rod 3 .

[0023] The inner wall of the bottom of the driving cylinder 1 is provided with a protrusion 17 extending vertically upward, and the lower part of the spring 16 is sleeved on the protrusion 17 .

[0024] The protruding portion 17 is provided with a through hole 18 , and the piston rod 3 passes through the through hole 18 and is sealed with the inner wall of the through hole 18 via a sealing ring.

[0025] Embodiment 2: A high-viscosity glue dispensing switch valve, comprising: a driving cylinder 1, a glue feeding block 2 arranged 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, 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 vertical glue sealing head 4 are provided between the glue feeding port 51 and the glue outlet 52. The sealing head 4 is connected to the glue outlet channel 62 directly opened in the glue inlet block 2, 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 and matched 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.

[0026] A horizontal partition 8 is provided in the driving cylinder body 1, thereby dividing the driving cavity in the driving cylinder body 1 into an upper cavity 91 and a lower cavity 92. The upper end of the vertically arranged piston rod 3 passes through the horizontal partition 8 and extends into the upper cavity 91 and is sealed with the horizontal partition 8. The outer side of the piston rod 3 is respectively provided with an upper piston disc 10 located in the upper cavity 91 and a lower piston disc 11 located in the lower cavity 92. A spring 16 in a compressed state is provided between the lower surface of the lower piston disc 11 and the inner wall of the bottom of the driving cylinder body 1. A first air pipe joint 131 connected to the upper cavity 91 is installed on the side wall of the driving cylinder body 1 and located above the upper piston disc 10. The side wall of the piston rod 3 and the upper piston disc 10 are provided with a first air pipe joint 131 connected to the upper cavity 91. A plurality of radially inward air inlet holes 141 are provided above the piston rod 3, a radially inward first air outlet hole 143 is provided on the side wall of the piston rod 3 and located between the horizontal partition 8 and the lower piston plate 11, the air inlet hole 141 and the first air outlet hole 143 are communicated through an air path 142 vertically provided in the piston rod 3, a second air outlet hole 151 is provided on the upper surface of the horizontal partition 8, a second air pipe joint 132 is installed on the side wall of the drive cylinder body 1 and located outside the horizontal partition 8, the second air pipe joint 132 is communicated with the second air outlet hole 151 through a pipeline 152 provided in the horizontal partition 8, and a third air outlet hole 153 connected with the lower cavity 92 is provided on the side wall of the lower part of the drive cylinder body 1;

[0027] When it is necessary to stop the glue discharge, air is introduced into the driving cylinder from the second air pipe joint, and the high-pressure gas sequentially passes through the pipeline in the horizontal partition and the second air outlet hole and acts on the lower surface of the upper piston disc to push the upper piston disc upward. At the same time, the action force of the spring pushes the lower piston disc upward, so that the glue sealing head moves up to a high position along with the piston rod connected to the piston disc to seal the glue discharge gap;

[0028] When the processing equipment suddenly loses power or gas, the lower piston plate 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 to prevent glue overflow and cause waste and damage to the product.

[0029] A sealing ring 12 is disposed between the upper piston disc 10 , the lower piston disc 11 and the inner wall of the upper cavity 91 , the lower cavity 92 , respectively.

[0030] The upper piston disc 10 and the lower piston disc 11 are each sleeved on the piston rod 3 through two retaining springs 19 and are sealedly connected to the outer surface of the piston rod 3 .

[0031] A pull rod 22 is installed in the center of the upper surface of the piston rod 3. The upper end of the pull rod 22 passes through the drive cylinder 1 and is installed with an adjustment cap 20 that can move up and down. A stop ring 21 is arranged outside the pull rod 22 and between the adjustment cap 20 and the drive cylinder 1. When the pull rod 22 moves to the lowest end of the stroke along with the piston rod 3, the upper end surface of the stop ring 21 is pressed and contacted with the lower end surface of the adjustment cap 20.

[0032] The size of the glue discharge gap between the sealing part and the glue outlet determines the flow rate of the glue. By screwing the adjusting cap downward or upward to adjust the distance between the adjusting cap and the stop ring in the cut-off state, the downward stroke of the piston rod can be adjusted, and then the size of the glue discharge gap between the sealing part and the glue outlet in the glue supply state can be adjusted, so as to adjust the glue output amount. The stop ring is in active contact with the adjusting rod, and can also limit the reciprocating piston rod to avoid the problem of poor glue supply accuracy caused by the eccentricity of the piston rod.

[0033] The adjusting cap 20 and the pull rod 22 are connected via threads.

[0034] A sealing ring is provided between the inner wall of the driving cylinder 1 and the pull rod 22 .

[0035] The working principle of the utility model is as follows:

[0036] When the dispensing operation is required, air is introduced into the driving cylinder from the first air pipe joint, and a part of the high-pressure gas acts on the upper surface of the upper piston disc to push the upper piston disc downward, and another part of the high-pressure gas acts on the upper surface of the lower piston disc after passing through the air inlet hole, the air path and the first air outlet hole in sequence to push the lower piston disc downward, so that the sealing head moves down to a low position along with the piston rod connected to the piston disc, and the glue discharge gap is opened. The setting of the double piston discs can greatly increase the force of the piston disc when it moves downward without increasing the air intake pressure to overcome the action of the spring, thereby ensuring the stability of the glue discharge gap size when the piston rod drives the sealing head to move to a low position, thereby ensuring the stability and consistency of the glue discharge flow rate;

[0037] When it is necessary to stop the glue discharge, air is introduced into the driving cylinder from the second air pipe joint, and the high-pressure gas sequentially passes through the pipeline in the horizontal partition and the second air outlet hole and acts on the lower surface of the upper piston disc to push the upper piston disc upward. At the same time, the action force of the spring pushes the lower piston disc upward, so that the glue sealing head moves up to a high position along with the piston rod connected to the piston disc to seal the glue discharge gap;

[0038] When the processing equipment suddenly loses power or gas, the lower piston plate 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 to prevent glue overflow and cause waste and damage to the product.

[0039] When the above-mentioned high-viscosity colloid dispensing switch valve is used, it can not only drive the piston rod equipped with a piston disk through the 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 air is out, but also greatly increase the force of the piston disk when moving downward to overcome the action of the spring without increasing the intake pressure, thereby ensuring the stability of the glue outlet gap size when the piston rod drives the glue sealing head to move to a low position, thereby ensuring the stability and consistency of the glue outlet flow rate.

[0040] 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 dispensing switch valve for high-viscosity colloids, 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) 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), and 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 outlet (62) vertically provided in the glue feeding block (2) are connected between the glue feeding port (51) and the glue outlet (52). The sealing head (4) and the piston rod (3) are connected to each other through the flow channel (62); 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 flow 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); 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); The invention is characterized in that: a horizontal partition (8) is arranged in the driving cylinder (1), thereby dividing the driving cavity in the driving cylinder (1) into an upper cavity (91) and a lower cavity (92); the upper end of the vertically arranged piston rod (3) passes through the horizontal partition (8) and extends into the upper cavity (91) and is sealed with the horizontal partition (8); an upper piston disc (10) located in the upper cavity (91) and a lower piston disc (11) located in the lower cavity (92) are respectively mounted on the outer side of the piston rod (3); a spring (16) in a compressed state is arranged between the lower surface of the lower piston disc (11) and the inner wall of the bottom of the driving cylinder (1); a first air pipe joint (131) connected to the upper cavity (91) is installed on the side wall of the driving cylinder (1) and located above the upper piston disc (10); and a first air pipe joint (131) connected to the upper cavity (91) is installed on the side wall of the piston rod (3) and located above the upper piston disc (10). A plurality of air inlet holes (141) are provided above the disk (10) and are radially inwardly directed. A first air outlet hole (143) is provided on the side wall of the piston rod (3) and is located between the horizontal partition (8) and the lower piston disk (11). The air inlet hole (141) and the first air outlet hole (143) are connected to each other through an air path (142) vertically provided in the piston rod (3). A second air outlet hole (151) is provided on the upper surface of the horizontal partition (8). A second air pipe joint (132) is installed on the side wall of the drive cylinder body (1) and is located outside the horizontal partition (8). The second air pipe joint (132) is connected to the second air outlet hole (151) through a pipe (152) provided in the horizontal partition (8). A third air outlet hole (153) connected to the lower cavity (92) is provided on the side wall of the lower portion of the drive cylinder body (1).

2. The dispensing switch valve for high viscosity colloid according to claim 1, characterized in that: A sealing ring (12) is provided between the upper piston disc (10) and the lower piston disc (11) and the inner wall of the upper cavity (91) and the lower cavity (92).

3. The dispensing switch valve for high viscosity colloid according to claim 1, characterized in that: The upper piston disc (10) and the lower piston disc (11) are each sleeved onto the piston rod (3) via two retaining springs (19) and are sealingly connected to the outer surface of the piston rod (3).

4. The dispensing switch valve for high-viscosity colloid according to claim 1, characterized in that: The inner wall at the bottom of the driving cylinder body (1) is provided with a protrusion (17) extending vertically upwards, and the lower part of the spring (16) is sleeved on the protrusion (17).

5. The dispensing switch valve for high-viscosity colloid according to claim 4, characterized in that: The raised portion (17) is provided with a through hole (18), and the piston rod (3) passes through the through hole (18) and is sealed with the inner wall of the through hole (18) via a sealing ring.

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