Dispensing switch valve

Abstract

The utility model discloses a dispensing switch valve which comprises a driving cylinder body, a glue feeding block arranged below the driving cylinder body, a piston rod capable of moving in the vertical direction and a glue sealing head installed at the lower end of the piston rod, a horizontal partition plate is arranged in the driving cylinder body, and therefore a driving cavity in the driving cylinder body is divided into an upper cavity body and a lower cavity body. The outer side of the piston rod is sleeved with an upper piston disc and a lower piston disc respectively, a first air pipe connector is installed above the piston discs, a second air pipe connector is installed below the lower piston disc, and second blind holes which are inward in the radial direction are formed in the side wall of the piston rod and located below the lower piston disc and between the horizontal partition plate and the upper piston disc respectively. And the two second blind holes are communicated through a second air channel formed in the piston rod. According to the utility model, on the basis of realizing glue opening and closing, the driving force is greatly improved without increasing the air pressure, so that the situation of glue leakage caused by insufficient glue sealing pressure when the glue feeding pressure is too large is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of glue dispensing, in particular to a glue dispensing switch valve. 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. The switch valve of the existing technology realizes the opening and closing of glue by switching on and off high-pressure gas. However, for glue with high viscosity and other glue with excessive glue pressure, it is easy to have insufficient sealing force, resulting in glue overflow and damage to the product to be dispensed. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a dispensing glue switch valve, which can greatly improve the driving force without increasing the air pressure on the basis of realizing the switching of glue, thereby avoiding the situation where the sealing pressure is insufficient and causes glue leakage when the glue feeding pressure is too high.

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

[0005] A horizontal partition is provided 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 extends into the upper cavity through the horizontal partition and is sealed with the horizontal partition, and an upper piston disk located in the upper cavity and a lower piston disk located in the lower cavity are respectively mounted on the outer side of the piston rod, 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 disk, a second air pipe joint connected to the lower cavity is installed on the side wall of the driving cylinder body and below the lower piston disk, a second blind hole radially inward is respectively provided on the side wall of the piston rod and below the lower piston disk, and between the horizontal partition and the upper piston disk, and the two second blind holes are connected through a second air path provided in the piston rod.

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

[0007] 1. In the above solution, a sealing assembly is provided between the piston rod and the glue feeding block and above the glue feeding channel.

[0008] 2. In the above solution, the piston rod is sealed with the bottom of the drive cylinder.

[0009] 3. 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, the lower cavity respectively.

[0010] 4. 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.

[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 glue dispensing switch valve, a horizontal partition is arranged in its driving cylinder body, so that the driving cavity in the driving cylinder body is divided 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 first air pipe joint connected with the upper cavity is arranged on the side wall of the driving cylinder body and above the upper piston disc, a second air pipe joint connected with the lower cavity is arranged on the side wall of the driving cylinder body and below the lower piston disc, a second blind hole radially inward is respectively arranged on the side wall of the piston rod and below the lower piston disc, between the horizontal partition and the upper piston disc, the two second blind holes are connected through a second air path arranged in the piston rod, on the basis of driving the sealing head to move up and down by the piston rod to realize the switching of the glue, the piston rod is driven to move up and down by the double piston discs, the driving force can be greatly improved without increasing the air pressure, thereby avoiding the situation that the sealing pressure is insufficient and the glue leaks when the glue feeding pressure is too large. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0014] Attached Figure 2 This is a schematic diagram of the cross-sectional structure of the dispensing switch valve of the utility model;

[0015] Attached Figure 3 For the utility model Figure 2 The enlarged schematic diagram of point A in the middle;

[0016] Attached Figure 4 For the utility model Figure 2 A magnified schematic diagram of point B in the middle.

[0017] 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. first blind hole; 142. first air path; 151. second blind hole; 152. second air path; 16. bushing; 161. oil hole; 162. plug; 163. oil inlet hole; 17. universal plug; 18. sealing ring; 19. retaining ring; 20. window hole; 21. through hole. DETAILED DESCRIPTION

[0018] The present invention can be further understood through the specific embodiments given below, but they are not intended to limit the present invention.

[0019] Embodiment 1: A dispensing switch valve comprises: a driving cylinder body 1, a glue feeding block 2 arranged below the driving cylinder body 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, the glue feeding port 51 and the glue outlet 52 are connected through a glue feeding flow channel 61 horizontally provided in the glue feeding block 2 and a glue outlet flow channel 62 vertically provided in the glue feeding block 2, a sealing portion 41 of the glue sealing head 4 is located below the glue outlet 52, a connecting rod portion 42 of the glue sealing head 4 extends upward into the glue outlet flow channel 62 and is connected to the piston rod 3, when the glue sealing head 4 moves to a high position with the piston rod 3, its sealing portion 41 is sealed with the glue outlet 52, when the glue sealing head 4 moves to a low position with the piston rod 3, a glue outlet gap is formed between its sealing portion 41 and the glue outlet 52;

[0020] 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 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. A second air pipe joint 131 connected to the upper cavity 91 is installed on the side wall of the driving cylinder 1 and located below the lower piston disc 11. A second air pipe joint 132 connected to the lower cavity 92 is provided, a first blind hole 141 is respectively provided on the side wall of the piston rod 3 and located above the upper piston disc 10, between the horizontal partition 8 and the lower piston disc 11, and the two first blind holes 141 are connected through a first air path 142 provided in the piston rod 3, a second blind hole 151 is respectively provided on the side wall of the piston rod 3 and located below the lower piston disc 11, between the horizontal partition 8 and the upper piston disc 10, and the two second blind holes 151 are connected through a second air path 152 provided in the piston rod 3;

[0021] When dispensing operation is required, air is introduced into the driving cylinder from the first air pipe joint, 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 passes through the first blind hole and the first air path in sequence and acts on the upper surface of the lower piston disc 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 outlet 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 intake pressure, thereby improving the smoothness of the glue dispensing process.

[0022] A sealing assembly 7 is disposed between the piston rod 3 and the glue feeding block 2 and above the glue feeding channel 61 .

[0023] The piston rod 3 and the bottom of the driving cylinder body 1 are sealed together.

[0024] 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.

[0025] 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 .

[0026] A sealing ring 18 is installed at the lower end of the glue outlet 52 , and the inner diameter of the sealing ring 18 is smaller than the outer diameter of the blocking portion 41 .

[0027] Embodiment 2: A dispensing switch valve comprises: 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, the glue feeding port 51 and the glue outlet 52 are connected through a glue feeding channel 61 horizontally provided in the glue feeding block 2 and a glue outlet channel 62 vertically provided in the glue feeding block 2, a sealing portion 41 of the glue sealing head 4 is located below the glue outlet 52, a connecting rod portion 42 of the glue sealing head 4 extends upward into the glue outlet channel 62 and is connected to the piston rod 3, when the glue sealing head 4 moves to a high position with the piston rod 3, its sealing portion 41 is sealed with the glue outlet 52, when the glue sealing head 4 moves to a low position with the piston rod 3, a glue outlet gap is formed between its sealing portion 41 and the glue outlet 52;

[0028] A horizontal partition 8 is provided in the driving cylinder body 1, so as to separate 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 extends through the horizontal partition 8 to 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 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. A second air pipe joint 132 connected to the lower cavity 92 is installed on the side wall of the driving cylinder body 1 and located below the lower piston disc 11. A second blind hole 151 radially inward is respectively provided on the side wall of the piston rod 3 and located below the lower piston disc 11, between the horizontal partition 8 and the upper piston disc 10, and the two second blind holes 151 are connected through a second air path 152 provided in the piston rod 3.

[0029] When it is necessary to stop discharging glue, air is introduced into the driving cylinder from the second air pipe joint, and a part of the high-pressure gas acts on the lower surface of the lower piston disc to push the lower piston disc downward, and another part of the high-pressure gas passes through the second air path and the second blind hole in sequence and acts on the lower surface of the upper piston disc to push the upper piston disc upward, thereby greatly improving the upward driving force without increasing the air pressure, thereby avoiding the situation where the sealing pressure is insufficient and glue leakage occurs when the glue feeding pressure is too high.

[0030] A sealing assembly 7 is disposed between the piston rod 3 and the glue feeding block 2 and above the glue feeding channel 61 .

[0031] 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.

[0032] The sealing assembly 7 further comprises: a sleeve 16 sleeved on the outer side of the piston rod 3, the upper end of the sleeve 16 is embedded in the driving cylinder 1 and a universal seal ring 17 is embedded and installed on the upper end of the sleeve 16, and the lower end of the sleeve 16 is sealed and connected to the upper surface of the glue feeding block 2 through a universal seal ring 17.

[0033] At least one oil hole 161 is provided on the upper side wall of the shaft sleeve 16, and at least one oil inlet hole 163 is provided on the lower side wall of the cylinder body 2. Each of the oil inlet holes 163 is connected to a corresponding oil hole 161, so that the oil storage tank can be replenished with grease in real time without disassembly.

[0034] A plug 162 is embedded and installed on one end of each of the oil inlet holes 163 away from the shaft sleeve 16 .

[0035] A window hole 20 is formed on the driving cylinder 1 above the shaft sleeve 16 and extends through the cylinder 1 in a horizontal direction.

[0036] The piston rod 3 is provided with a through hole 21 .

[0037] The working principle of the utility model is as follows:

[0038] When dispensing operation is required, air is introduced into the driving cylinder from the first air pipe joint, 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 passes through the first blind hole and the first air path in sequence and acts on the upper surface of the lower piston disc 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 dispensing 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, thereby improving the smoothness of the dispensing process;

[0039] When it is necessary to stop discharging glue, air is introduced into the driving cylinder from the second air pipe joint, and a part of the high-pressure gas acts on the lower surface of the lower piston disc to push the lower piston disc downward, and another part of the high-pressure gas passes through the second air path and the second blind hole in sequence and acts on the lower surface of the upper piston disc to push the upper piston disc upward, thereby greatly improving the upward driving force without increasing the air pressure, thereby avoiding the situation where the sealing pressure is insufficient and glue leakage occurs when the glue feeding pressure is too high.

[0040] When the above-mentioned dispensing switch valve is used, on the basis of driving the sealing head up and down by the piston rod to realize the switching of the glue, the piston rod is driven up and down by the double piston disk, which can greatly improve the driving force without increasing the air pressure, thereby avoiding the situation where the sealing pressure is insufficient and causes glue leakage when the glue feeding pressure is too high.

[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 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 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 plate (10) located in the upper cavity (91) and a lower piston plate (11) located in the lower cavity (92) are respectively mounted on the outer side of the piston rod (3); and a piston plate (11) located on the side wall of the driving cylinder (1) and located on the upper piston plate (10) ) is provided above the upper chamber (91), a first air pipe joint (131) connected to the upper chamber (91) is provided on the side wall of the drive cylinder (1) and below the lower piston disc (11), a second air pipe joint (132) connected to the lower chamber (92) is provided on the side wall of the drive cylinder (1) and below the lower piston disc (11), and a second blind hole (151) radially inward is provided on the side wall of the piston rod (3) and below the lower piston disc (11), between the horizontal partition (8) and the upper piston disc (10), and the two second blind holes (151) are connected via a second air path (152) provided in the piston rod (3).

2. The dispensing 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).

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

4. The dispensing switch valve 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).

5. The dispensing switch valve 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).

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