Two-component fluid cut-off mechanism

Abstract

The utility model discloses a two-component fluid cut-off mechanism which comprises a glue outlet block, a glue A inlet block arranged on one side of the glue outlet block and a glue B inlet block arranged on the other side of the glue outlet block, and the other end of a valve element is connected with a piston arranged on one side, opposite to the glue outlet block, of the glue A inlet block or the glue B inlet block. The disc body part of the piston located at the end, away from the valve element, of the column body part can be movably embedded into a groove formed in a driving block and is in sealing fit with the side wall of the groove, so that a driving cavity is formed between the disc body part of the piston and the groove, and an air pipe connector installed on the driving block is communicated with the driving cavity. The elastic piece is arranged on the outer side of the cylinder part of the piston and is in a compressed state. Certain back-suction force can be generated during glue closing, so that glue outlet pressure in the glue outlet runner is relieved, glue is prevented from overflowing after glue closing, the stability of the glue closing state is guaranteed through the elastic piece, and glue waste caused by abnormal glue outlet is avoided.

Description

Technical Field

[0001] This utility model relates to the field of dispensing technology, and in particular to a two-component fluid shut-off mechanism. Background Technology

[0002] In industrial production processes, the transportation of fluid materials is often required. In the adhesive application industry, it is common to mix two types of adhesives. Mixing adhesives A and B in a specific ratio can enhance adhesion. During the dispensing process, valves / pumps are needed to transport the adhesive. To facilitate the dispensing operation, repeated stops are required during the adhesive delivery process. Therefore, situations can easily occur where adhesive overflows and damages the product due to untimely or poor stoppage. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a two-component fluid shut-off mechanism. This two-component fluid shut-off mechanism can not only open and close the dispensing channel of the two-component adhesive, but also generate a certain back suction force when closing the dispensing channel to release the dispensing pressure in the dispensing channel and prevent the adhesive from overflowing after closing the dispensing channel.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a two-component fluid shut-off mechanism, comprising: a dispensing block with an A-component dispensing channel and a B-component dispensing channel respectively; an A-component inlet block disposed on one side of the dispensing block; and a B-component inlet block disposed on the other side of the dispensing block. The A-component inlet block and the B-component inlet block are correspondingly provided with A-component inlet channels and B-component inlet channels. The vertically extending A-component inlet channel and the A-component dispensing channel, and the vertically extending B-component inlet channel and the B-component dispensing channel are all connected by a horizontally extending connecting channel. A valve seat is installed in each connecting channel, and one end of a valve core movable in the horizontal direction passes through the valve seat. A central through hole is fitted with a stop head that can seal with the central through hole. The other end of the valve core is connected to a piston located on the side opposite to the outlet block of either the A-grade glue inlet block or the B-grade glue inlet block. The piston's cylindrical portion is connected to the valve core. The piston's disc portion, located at the end of the cylindrical portion away from the valve core, is movably embedded in a groove on the drive block and seals with the side wall of the groove, thereby forming a drive chamber between the piston's disc portion and the groove. An air pipe connector installed on the drive block communicates with the drive chamber. An elastic element fitted on the outside of the piston's cylindrical portion and in a compressed state is provided between the piston's disc portion and the corresponding A-grade glue inlet block or B-grade glue inlet block.

[0005] The following are further improvements to the above technical solution:

[0006] 1. In the above scheme, one end of the connecting channel is connected to the lower end of the A glue inlet channel or the B glue inlet channel, and the other end of the connecting channel is connected to the upper end of the A glue outlet channel or the B glue outlet channel.

[0007] 2. In the above scheme, the A glue inlet block and the B glue inlet block are respectively installed on the end faces of the glue outlet block on both sides.

[0008] 3. In the above scheme, the valve seat is sealed at the connection between the dispensing block and the A glue inlet block or the B glue inlet block.

[0009] 4. In the above scheme, a dispensing nozzle is installed on the lower end face of the dispensing block. The dispensing nozzle has an A glue outlet and a B glue outlet respectively provided corresponding to the A glue dispensing channel and the B glue dispensing channel.

[0010] 5. In the above scheme, the dispensing nozzle is provided with threads for connecting to the mixing tube.

[0011] 6. In the above scheme, an inner chamfer is provided on the valve seat at one end near the valve core and the end face of the stop head facing the central through hole is set as an inclined surface that cooperates with the inner chamfer.

[0012] Due to the application of the above technical solution, this utility model has the following advantages compared with the prior art:

[0013] This utility model relates to a two-component fluid shut-off mechanism. The vertically extending A-component inlet and outlet channels, as well as the vertically extending B-component inlet and outlet channels, are connected by a horizontally extending connecting channel. Each connecting channel contains a valve seat. One end of a horizontally movable valve core passes through a central through-hole on the valve seat and is fitted with a shut-off head that seals with the central through-hole. The other end of the valve core is connected to a piston located on the side opposite to the outlet block of either the A-component inlet or the B-component inlet. The piston's cylindrical portion is connected to the valve core, and the disc portion of the piston, located at the end of the cylindrical portion away from the valve core, is movably embedded within it. A drive chamber is formed between the piston disc and the groove, with a sealing fit between the groove sidewall and the drive block. An air pipe connector mounted on the drive block communicates with the drive chamber. An elastic element, which is fitted on the outside of the piston cylinder and is in a compressed state, is provided between the piston disc and the corresponding A-component or B-component inlet block. This element can both open and close the dispensing channel of the two-component adhesive and generate a certain back suction force when the adhesive is closed to release the dispensing pressure in the dispensing channel and prevent the adhesive from overflowing after closing. The elastic element also ensures the stability of the closed state and prevents the waste of adhesive due to abnormal dispensing. Attached Figure Description

[0014] Appendix Figure 1This is a schematic diagram of the overall structure of the two-component fluid shut-off mechanism of this utility model;

[0015] Appendix Figure 2 This is a cross-sectional schematic diagram of the two-component fluid shut-off mechanism of this utility model;

[0016] Appendix Figure 3 for Figure 2 Enlarged view of point A in the image;

[0017] Appendix Figure 4 This is a front view of the structure of the two-component fluid shut-off mechanism of this utility model.

[0018] In the attached diagrams: 1. Dispensing block; 11. A-grade dispensing channel; 12. B-grade dispensing channel; 2. A-grade inlet block; 21. A-grade inlet channel; 3. B-grade inlet block; 31. B-grade inlet channel; 4. Connecting channel; 41. Valve seat; 42. Central through hole; 43. Valve core; 44. Stop head; 5. Piston; 51. Column part; 52. Disc part; 6. Drive block; 61. Drive chamber; 62. Air pipe connector; 7. Elastic element; 8. Dispensing nozzle; 81. A-grade dispensing port; 82. B-grade dispensing port. Detailed Implementation

[0019] The present patent can be further understood through the specific embodiments given below, but they are not intended to limit the present patent.

[0020] Example 1: A two-component fluid shut-off mechanism, comprising: a dispensing block 1 with an A-component dispensing channel 11 and a B-component dispensing channel 12 respectively; an A-component inlet block 2 disposed on one side of the dispensing block 1; and a B-component inlet block 3 disposed on the other side of the dispensing block 1. The A-component inlet block 2 and the B-component inlet block 3 are respectively provided with A-component inlet channels 21 and 31. The vertically extending A-component inlet channel 21 is connected to the A-component dispensing channel 11, and the vertically extending B-component inlet channel 31 is connected to the B-component dispensing channel 12, all through a horizontally extending connecting channel 4. Each connecting channel 4 contains a valve seat 41. One end of a valve core 43 movable in the horizontal direction passes through a central through hole 42 on the valve seat 41 and is fitted with a valve core 43 that can move horizontally. The central through-hole 42 is sealed with the stop head 44. The other end of the valve core 43 is connected to the piston 5 located on the side opposite to the outlet block 1 of the A glue inlet block 2 or B glue inlet block 3. The cylindrical part 51 of the piston 5 is connected to the valve core 43. The disc part 52 of the piston 5 located at the end of the cylindrical part 51 away from the valve core 43 is movably embedded in a groove opened on the drive block 6 and is sealed with the side wall of the groove, thereby forming a drive cavity 61 between the disc part 52 of the piston 5 and the groove. An air pipe connector 62 installed on the drive block 6 communicates with the drive cavity 61. An elastic member 7, which is fitted on the outside of the cylindrical part 51 of the piston 5 and is in a compressed state, is provided between the disc part 52 of the piston 5 and the corresponding A glue inlet block 2 or B glue inlet block 3.

[0021] When in use, it is generally used in conjunction with a glue supply mechanism (such as glue valve, glue pump, etc.). Glue A and glue B from the glue supply mechanism enter the glue A inlet channel and glue B inlet channel respectively.

[0022] When air is not introduced into the drive chamber through the air pipe joint, the piston disc moves away from the A glue inlet block and the B glue inlet block under the action of the elastic element, thereby driving the stop head that moves with the piston to seal with the central through hole on the valve seat and close the glue outlet channel.

[0023] When it is necessary to dispense adhesive, air is introduced into the drive chamber through the air pipe connector. Under the pressure of the high-pressure gas, the piston disc moves towards the A-grade adhesive inlet block and the B-grade adhesive inlet block, while simultaneously squeezing the elastic element. This drives the stop head, which moves with the piston, away from the valve seat. An adhesive dispensing gap is formed between the stop head and the central through hole on the valve seat. The adhesive in the A-grade adhesive inlet channel and the B-grade adhesive inlet channel flows through the gap between the valve core and the connecting channel, the valve seat, and the gap formed between the stop head and the central through hole on the valve seat, and then flows out through the A-grade adhesive outlet and the B-grade adhesive outlet on the dispensing nozzle into the mixing tube installed at the lower end of the dispensing nozzle.

[0024] One end of the connecting channel 4 is connected to the lower end of the A glue inlet channel 21 or the B glue inlet channel 31, and the other end of the connecting channel 4 is connected to the upper end of the A glue outlet channel 11 or the B glue outlet channel 12.

[0025] The aforementioned A-grade glue inlet block 2 and B-grade glue inlet block 3 are respectively installed on the end faces of the glue outlet block 1 on both sides.

[0026] The valve seat 41 is sealed and installed at the connection between the dispensing block 1 and the A glue inlet block 2 or the B glue inlet block 3.

[0027] An inner chamfer is provided on the valve seat 41 and at the end of the central through hole 42 near the valve core 43. The end face of the stop head 44 facing the central through hole 42 is set as an inclined surface that cooperates with the inner chamfer.

[0028] Example 2: A two-component fluid shut-off mechanism, comprising: a dispensing block 1 with an A-component dispensing channel 11 and a B-component dispensing channel 12 respectively; an A-component inlet block 2 disposed on one side of the dispensing block 1; and a B-component inlet block 3 disposed on the other side of the dispensing block 1. The A-component inlet block 2 and the B-component inlet block 3 are respectively provided with A-component inlet channels 21 and 31. The vertically extending A-component inlet channel 21 is connected to the A-component dispensing channel 11, and the vertically extending B-component inlet channel 31 is connected to the B-component dispensing channel 12, all through a horizontally extending connecting channel 4. Each connecting channel 4 contains a valve seat 41. One end of a valve core 43 movable in the horizontal direction passes through a central through hole 42 on the valve seat 41 and is fitted with a valve core 43 that can connect with the central through hole 42. The central through-hole 42 is sealed with the stop head 44. The other end of the valve core 43 is connected to the piston 5 located on the side opposite to the outlet block 1 of the A glue inlet block 2 or B glue inlet block 3. The cylindrical part 51 of the piston 5 is connected to the valve core 43. The disc part 52 of the piston 5 located at the end of the cylindrical part 51 away from the valve core 43 is movably embedded in a groove opened on the drive block 6 and is sealed with the side wall of the groove, thereby forming a drive cavity 61 between the disc part 52 of the piston 5 and the groove. An air pipe connector 62 installed on the drive block 6 communicates with the drive cavity 61. An elastic member 7, which is fitted on the outside of the cylindrical part 51 of the piston 5 and is in a compressed state, is provided between the disc part 52 of the piston 5 and the corresponding A glue inlet block 2 or B glue inlet block 3.

[0029] The opening and closing of the glue can be achieved by the extension and retraction of the valve core and the cooperation between the stop head on the valve core and the valve seat. The pneumatic opening and the mechanical closing of the elastic element can generate a certain suction force when closing the glue, thereby relieving the glue pressure in the glue flow channel and preventing glue overflow after closing. Moreover, the glue closing state can be kept stable without external energy supply, avoiding glue waste caused by abnormal glue dispensing.

[0030] One end of the connecting channel 4 is connected to the lower end of the A glue inlet channel 21 or the B glue inlet channel 31, and the other end of the connecting channel 4 is connected to the upper end of the A glue outlet channel 11 or the B glue outlet channel 12.

[0031] The aforementioned A-grade glue inlet block 2 and B-grade glue inlet block 3 are respectively installed on the end faces of the glue outlet block 1 on both sides.

[0032] A dispensing nozzle 8 is installed on the lower end face of the dispensing block 1. The dispensing nozzle 8 has an A glue outlet 81 and a B glue outlet 82 respectively, which are respectively provided to the A glue dispensing channel 11 and the B glue dispensing channel 12.

[0033] The aforementioned dispensing nozzle 8 is provided with threads for connecting to the mixing tube.

[0034] The working principle is as follows: When in use, it is generally used in conjunction with a glue supply mechanism (such as glue valve, glue pump, etc.). Glue A and glue B from the glue supply mechanism enter the glue A inlet channel and glue B inlet channel respectively.

[0035] When air is not introduced into the drive chamber through the air pipe joint, the piston disc moves away from the A glue inlet block and the B glue inlet block under the action of the elastic element, thereby driving the stop head that moves with the piston to seal with the central through hole on the valve seat and close the glue outlet channel.

[0036] When it is necessary to dispense adhesive, air is introduced into the drive chamber through the air pipe connector. Under the pressure of the high-pressure gas, the piston disc moves towards the A adhesive inlet block and the B adhesive inlet block, while squeezing the elastic element. This drives the stop head, which moves with the piston, away from the valve seat. An adhesive dispensing gap is formed between the stop head and the central through hole on the valve seat. The adhesive in the A adhesive inlet channel and the B adhesive inlet channel flows through the gap between the valve core and the connecting channel, the valve seat, and the gap formed between the stop head and the central through hole on the valve seat, and then flows into the A adhesive dispensing channel and the B adhesive dispensing channel respectively. It then flows out through the A adhesive dispensing port and the B adhesive dispensing port on the dispensing nozzle and enters the mixing tube installed at the lower end of the dispensing nozzle.

[0037] The opening and closing of the glue can be achieved by the extension and retraction of the valve core and the cooperation between the stop head on the valve core and the valve seat. The pneumatic opening and the mechanical closing of the elastic element can generate a certain suction force when closing the glue, thereby relieving the glue pressure in the glue flow channel and preventing glue overflow after closing. Moreover, the glue closing state can be kept stable without external energy supply, avoiding glue waste caused by abnormal glue dispensing.

[0038] When the above-mentioned two-component fluid shut-off mechanism is used, it can not only open and close the dispensing channel of the two-component adhesive, but also generate a certain back suction force when closing the dispensing channel to release the dispensing pressure in the dispensing channel and prevent the adhesive from overflowing after closing the dispensing channel. In addition, the elastic element ensures the stability of the closed state and avoids the waste of adhesive caused by abnormal dispensing.

[0039] The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be included within the scope of protection of this utility model.

Claims

1. A two-component fluid shut-off mechanism, comprising: The assembly comprises an A-plastic dispensing block (1) having an A-plastic dispensing channel (11) and a B-plastic dispensing channel (12), an A-plastic inlet block (2) located on one side of the dispensing block (1), and a B-plastic inlet block (3) located on the other side of the dispensing block (1). The A-plastic inlet block (2) and the B-plastic inlet block (3) are respectively provided with A-plastic inlet channels (21) and B-plastic inlet channels (31). The assembly is characterized in that: the vertically extending A-plastic inlet channel (21) and the A-plastic inlet channel (31) are respectively provided with A-plastic inlet channels (21) and B-plastic inlet channels (31). The glue outlet channel (11) and the vertically extending B glue inlet channel (31) and B glue outlet channel (12) are all connected by a horizontally extending connecting channel (4). Each connecting channel (4) is equipped with a valve seat (41). One end of a valve core (43) that can move horizontally passes through a central through hole (42) opened on the valve seat (41) and is equipped with a stop that can seal with the central through hole (42). The other end of the valve core (43) is connected to the piston (5) located on the side opposite to the outlet block (1) of the A glue inlet block (2) or B glue inlet block (3). The cylindrical part (51) of the piston (5) is connected to the valve core (43). The disc part (52) of the piston (5) located at the end of the cylindrical part (51) away from the valve core (43) is movably embedded in a groove opened on the drive block (6) and sealed with the side wall of the groove, thereby forming a drive cavity (61) between the disc part (52) of the piston (5) and the groove. An air pipe connector (62) installed on the drive block (6) communicates with the drive cavity (61). An elastic member (7) fitted on the outside of the cylindrical part (51) of the piston (5) and in a compressed state is provided between the disc part (52) of the piston (5) and the corresponding A glue inlet block (2) or B glue inlet block (3).

2. The two-component fluid shut-off mechanism according to claim 1, characterized in that: One end of the connecting channel (4) is connected to the lower end of the A glue inlet channel (21) or the B glue inlet channel (31), and the other end of the connecting channel (4) is connected to the upper end of the A glue outlet channel (11) or the B glue outlet channel (12).

3. The two-component fluid shut-off mechanism according to claim 1, characterized in that: The A-glue inlet block (2) and the B-glue inlet block (3) are respectively installed on the end faces of the two sides of the glue outlet block (1).

4. The two-component fluid shut-off mechanism according to claim 3, characterized in that: The valve seat (41) is sealed at the connection between the glue outlet block (1) and the A glue inlet block (2) or the B glue inlet block (3).

5. The two-component fluid shut-off mechanism according to claim 1, characterized in that: A dispensing nozzle (8) is installed on the lower end face of the dispensing block (1). The dispensing nozzle (8) has an A glue outlet (81) and a B glue outlet (82) respectively corresponding to the A glue dispensing channel (11) and the B glue dispensing channel (12).

6. The two-component fluid shut-off mechanism according to claim 5, characterized in that: The dispensing nozzle (8) is provided with threads for connecting to the mixing tube.

7. The two-component fluid shut-off mechanism according to claim 1, characterized in that: An inner chamfer is provided on the valve seat (41) at one end near the valve core (43) in the central through hole (42), and the end face of the stop head (44) facing the central through hole (42) is set as an inclined surface that cooperates with the inner chamfer.

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