Cut-off type double-channel switch valve

Abstract

The invention discloses a cut-off type double-channel switch valve, which belongs to the technical field of fluid control switches and is characterized by comprising a power mechanism and a switch valve, the power mechanism is connected with the switch valve, and a cylinder piston is mounted in a cavity of a cylinder body; two guide shafts are installed in a cavity of the air cylinder body, the upper ends of the two guide shafts are connected with a top cap respectively, the top cap is placed below the air cylinder piston, the outer sides of the guide shafts are sleeved with compression springs, the upper ends of the compression springs are connected with the top cap, and the lower ends of the compression springs are connected with the lower end wall of the cavity of the air cylinder body. The lower end of the cylinder body is connected with the switch valve through the middle connecting sleeve, the lower end of the valve body is connected with the confluence block, two confluence cavities of the confluence block are communicated with the corresponding glue outlets respectively, the lower end of the guide shaft is connected with the valve element through the connecting shaft, and the valve element is installed at the position of a communicating opening of the glue inlet and the confluence cavities. Compared with the prior art, the valve has the characteristic that two channels of the valve can be quickly opened and closed.

Description

Technical Field

[0001] The invention relates to the technical field of fluid control switches, in particular to a cut-off double-channel switch valve. Background Art

[0002] In the modern highly automated industrial manufacturing environment, adhesive technology, as a key technology, is widely used in many fields such as automobile manufacturing, electronic packaging, aerospace and medical devices. In order to meet the complex and changing process requirements, there are many types of glues, among which two-component glues have become one of the indispensable materials due to their unique performance advantages, such as adjustable curing time and enhanced bonding strength.

[0003] In the application process of two-component glue, precise control of the mixing of the two components A / B is a crucial link. Since the A / B glue must be mixed strictly in proportion before spraying to ensure the stable performance of the final product, it is a top priority to accurately control the start and stop of each glue before mixing. This requires the control system to have a high degree of synchronization and response speed to ensure that the A / B glue can be opened and flow into the mixer almost at the same time, and closed synchronously after the mixing is completed, so as to effectively avoid the problems of instantaneous ratio deviation and uneven mixing, and ensure the stability and consistency of product quality.

[0004] In addition, given the special requirements of the gluing process for the viscosity of the glue, especially when the glue is required to be in the form of a paste, it poses a higher challenge to the spraying equipment. In this case, it is necessary to ensure that the switch valve can withstand and stably output a large working pressure to ensure that the glue can be sprayed smoothly and evenly onto the target surface. The demand for high working pressure also requires the switch valve to be designed to be sturdy and durable, able to withstand long-term high-intensity operations without being easily damaged.

[0005] Solid powder or high-hardness fillers that may be added to some two-component glue formulas further complicate the flow of glue. To ensure that the glue can pass smoothly and not leak under high pressure conditions, the sealing pair of the switch valve must adopt a hard sealing structure, such as metal-to-metal sealing, to replace traditional soft sealing materials such as rubber and polytetrafluoroethylene. Hard sealing can not only effectively resist the wear of filler particles, but also maintain excellent sealing performance under high pressure environments, prevent glue leakage, and ensure the cleanliness of the production environment and safety of operations.

[0006] Considering that A / B glue must remain independent before mixing to avoid premature chemical reactions that affect the use effect, the design of the entire control system must also ensure that the two groups of glue are in a completely isolated state at all stages before mixing. In order to achieve this goal, the current industry has proposed a variety of technical solutions, each of which has its own unique advantages and limitations.

[0007] First, two power cylinders are used to control the start and stop of the two glue channels respectively. Although independent control can be achieved directly, this method significantly increases the volume and weight of the valve, puts forward higher inertia requirements for the servo motor in the CNC gluing system, and increases the complexity and cost of the system.

[0008] Secondly, we tried to use a power cylinder with soft sealing materials to achieve the simultaneous start and stop of A / B glue, aiming to compensate for the problems caused by processing errors through the elasticity of soft seals. However, soft sealing materials are prone to wear under high pressure and high speed opening and closing conditions, which limits the working pressure and sealing life of the switch valve. In addition, the pressure resistance of soft seals also limits their application in high-demand occasions.

[0009] The third solution focuses on high-precision machining, striving to ensure that the two channels can be closed at the same time by improving machining accuracy. Although this method can solve the synchronization problem in theory, in actual operation, due to the limitations of machining accuracy and assembly accuracy, it is difficult to ensure that the two channels remain perfectly synchronized after long-term operation. In addition, once the sealing pair of one channel cannot be closed due to impurities or other reasons, the other channel may also leak, affecting the overall performance. Summary of the invention

[0010] The object of the present invention is to provide a cut-off dual-channel switch valve to address the deficiencies of the above prior art, so as to achieve the purpose of rapid opening and closing of the two channels of the valve.

[0011] A cut-off dual-channel switch valve provided by the present invention is characterized in that it includes a power mechanism and a switch valve, the power mechanism is connected to the switch valve, the power mechanism includes a cylinder piston, a piston rod, a cylinder end cover, a cylinder body and a guide shaft, the interior of the cylinder body is provided with a cavity with an upper end opening, a cylinder piston is installed in the cavity of the cylinder body, the cylinder piston is in contact with the inner wall of the cavity of the cylinder body, and the cylinder piston is slidably matched with the cavity of the cylinder body; two symmetrically distributed second guide through holes are provided on the lower end wall of the cylinder body, two guide shafts are installed in the cavity of the cylinder body, the lower ends of the two guide shafts respectively pass through the corresponding second guide through holes, the upper ends of the two guide shafts are respectively connected to top caps, the top caps are placed below the cylinder piston, and a compression spring is sleeved on the outer side of the guide shaft, and the compression spring The upper end of the spring is connected to the top cap, and the lower end is connected to the lower end wall of the cavity of the cylinder body; two ventilation holes are provided on the wall of the cylinder body, and the two ventilation holes are respectively located at the upper and lower ends of the cylinder piston; the lower end of the cylinder body is connected to the switch valve through an intermediate connecting sleeve, and the switch valve includes a valve core, a valve body and a junction block, and the two ends of the valve body are respectively provided with glue inlets, the lower end of the valve body is connected to the junction block, and the junction block is provided with two junction chambers, and the two junction chambers are respectively connected to the corresponding glue outlets, and the lower end of the junction block is provided with a glue outlet, and the two junction chambers of the junction block are respectively connected to the glue outlet, and the upper end of the valve body is provided with two connecting holes, and the two connecting holes are respectively connected to the upper end of the glue inlet, and the lower end of the guide shaft is connected to the valve core through a connecting shaft, and the valve core is installed at the connecting port position between the glue inlet and the junction chamber to isolate the glue inlet from the junction chamber.

[0012] Furthermore, a cylinder end cover is fixedly installed on the upper end of the cylinder body, the upper end of the cylinder piston is fixedly connected to the piston rod, a first guide through hole is provided on the cylinder end cover, the piston rod passes through the first guide through hole of the cylinder end cover, and the two are slidably matched.

[0013] Furthermore, a sealing ring is installed between the piston rod and the inner wall of the first guide through hole of the cylinder end cover.

[0014] Furthermore, a sealing sleeve is installed in the communicating hole of the valve body, a through hole is provided on the sealing sleeve, and the connecting shaft passes through the through hole on the sealing sleeve and is slidably matched with the sealing sleeve.

[0015] Furthermore, a guide rod is installed at the center of the glue outlet of the manifold block, and the lower end of the guide rod extends out of the glue outlet.

[0016] Compared with the prior art, the present invention has the following outstanding beneficial effects: The present invention can drive the top cap and the guide shaft to move downward through the cylinder piston downward movement, and the guide shaft drives the valve core to move downward through the connecting shaft to open the connecting port between the glue inlet and the confluence chamber. When it is necessary to close the connecting port between the glue inlet and the confluence chamber, gas is introduced into the air vent at the lower end of the cylinder piston of the cylinder body to make the cylinder piston move upward and reset, and the compression spring drives the top cap and the guide shaft to move upward to reset the valve core and re-block the connecting port between the glue inlet and the confluence chamber to isolate the glue inlet from the confluence chamber, which not only realizes the rapid opening and closing of the two channels of the valve but also improves the service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a front view of the present invention; Figure 2 It is a schematic diagram of the internal structure of the present invention; Among them, 1. power mechanism, 11. cylinder end cover, 12. piston rod, 13. cylinder piston, 14. cylinder body, 15. top cap, 16. guide shaft, 17. compression spring, 18. connecting shaft, 2. intermediate connecting sleeve, 3. switch valve, 31. sealing sleeve, 32. valve body, 33. connecting shaft, 34. valve core, 35. guide rod, 36. manifold. DETAILED DESCRIPTION

[0018] The present invention is further described below in conjunction with the accompanying drawings and specific implementation methods.

[0019] like Figure 1 and 2 As shown, the present invention includes a power mechanism 1 and a switch valve 3.

[0020] The power mechanism 1 is connected to the switch valve 3 , and the power mechanism 1 controls the opening and closing of the switch valve 3 .

[0021] The power mechanism 1 includes a cylinder piston 13, a piston rod 12, a cylinder end cover 11, a cylinder body 14 and a guide shaft 16. The interior of the cylinder body 14 is provided with a cavity with an upper end opening. The cylinder end cover 11 is fixedly installed on the upper end of the cylinder body 14. The cylinder piston 13 is installed in the cavity of the cylinder body 14. The cylinder piston 13 fits the inner wall of the cavity of the cylinder body 14. The cylinder piston 13 and the cavity of the cylinder body 14 are slidably matched. The upper end of the cylinder piston 13 is fixedly connected to the piston rod 12. The cylinder end cover 11 is provided with a first guide through hole. The piston rod 12 passes through the first guide through hole of the cylinder end cover 11, and the two are slidably matched.

[0022] In the optimized solution, a sealing ring is installed between the piston rod 12 and the inner wall of the first guide through hole of the cylinder end cover 11 .

[0023] The lower end wall of the cylinder body 14 is provided with two symmetrically distributed second guide through holes, and two guide shafts 16 are installed inside the cavity of the cylinder body 14. The lower ends of the two guide shafts 16 pass through the corresponding second guide through holes respectively, and the upper ends of the two guide shafts 16 are respectively connected to the top caps 15, and the top caps 15 are placed under the cylinder piston 13. The outer side of the guide shaft 16 is sleeved with a compression spring 17, and the upper end of the compression spring 17 is connected to the top cap 15, and the lower end is connected to the lower end wall of the cavity of the cylinder body 14.

[0024] The wall of the cylinder body 14 is provided with two vent holes, which are respectively located at the upper and lower ends of the cylinder piston 13 .

[0025] The lower end of the cylinder body 14 is connected to the switch valve 3 through the intermediate connecting sleeve 2. The switch valve 3 includes a valve core 34, a valve body 32 and a manifold block 36. The two ends of the valve body 32 are respectively provided with a glue inlet. The lower end of the valve body 32 is fixedly connected to the manifold block 36. The manifold block 36 is provided with two manifold cavities, which are respectively connected to the corresponding glue outlets. The lower end of the manifold block 36 is provided with a glue outlet. The two manifold cavities of the manifold block 36 are respectively connected to the glue outlets. The upper end of the valve body 32 is provided with two connecting holes, which are respectively connected to the upper end of the glue inlet. The lower end of the guide shaft 16 is connected to the valve core 34 through a connecting shaft. The valve core 34 is installed at the connecting port position of the glue inlet and the manifold cavity to isolate the glue inlet from the manifold cavity. When the valve core 34 moves downward, the connecting port between the glue inlet and the manifold cavity can be opened to connect the glue inlet with the manifold cavity.

[0026] A sealing sleeve 31 is installed in the communicating hole of the valve body 32 . The sealing sleeve 31 is provided with a through hole. The connecting shaft passes through the through hole of the sealing sleeve 31 and is slidably matched with the sealing sleeve 31 .

[0027] In the optimized solution, a guide rod 35 is installed at the center of the glue outlet of the confluence block 36, and the lower end of the guide rod 35 extends out of the glue outlet. When the two glues flow into the glue outlet from the two confluence cavities respectively, they can be mixed through the guide rod 35.

[0028] The operation process is as follows: when using the present invention, the two air holes of the cylinder body 14 are connected to the air source respectively, and glue is introduced into the two glue inlets of the valve body 32 respectively. When the valve core 34 needs to be opened, gas is introduced into the air hole at the upper end of the cylinder piston 13 of the cylinder body 14 to make the cylinder piston 13 move downward. During the downward movement of the cylinder piston 13, the top cap 15 and the guide shaft 16 are driven to move downward. The guide shaft 16 drives the valve core 34 to move downward through the connecting shaft, and the glue inlet is opened. The connecting port with the confluence chamber is opened, so that the two glues flow into the glue outlet of the confluence block 36 and are mixed through the guide rod 35; when it is necessary to close the connecting port between the glue inlet and the confluence chamber, gas is introduced into the vent hole at the lower end of the cylinder piston 13 of the cylinder body 14 to make the cylinder piston 13 move upward and reset, and the compression spring 17 drives the top cap 15 and the guide shaft 16 to move upward, so that the valve core 34 is reset and re-blocked at the connecting port between the glue inlet and the confluence chamber, thereby isolating the glue inlet from the confluence chamber.

[0029] It should be noted that the specific embodiments of the present invention have been described in detail. For those skilled in the art, various obvious changes to the present invention without departing from the spirit and scope of the present invention are within the protection scope of the present invention.

Claims

1. A cut-off dual-channel switch valve, characterized in that: The invention comprises a power mechanism (1) and a switch valve (3), wherein the power mechanism (1) is connected to the switch valve (3), and the power mechanism (1) comprises a cylinder piston (13), a piston rod (12), a cylinder end cover (11), a cylinder body (14) and a guide shaft (16). The cylinder body (14) is provided with a cavity with an upper end opening, and the cylinder piston (13) is installed in the cavity of the cylinder body (14). The cylinder piston (13) is in contact with the inner wall of the cavity of the cylinder body (14). (13) is slidably matched with the cavity of the cylinder body (14); the lower end wall of the cylinder body (14) is provided with two symmetrically distributed second guide through holes, and two guide shafts (16) are installed inside the cavity of the cylinder body (14). The lower ends of the two guide shafts (16) respectively pass through the corresponding second guide through holes, and the upper ends of the two guide shafts (16) are respectively connected to the top caps (15), and the top caps (15) are placed below the cylinder piston (13). The outer side of the guide shaft (16) is covered with a compression spring (17). The compression spring The upper end of the spring (17) is connected to the top cap (15), and the lower end is connected to the lower end wall of the cavity of the cylinder body (14); the wall of the cylinder body (14) is provided with two vent holes, and the two vent holes are respectively located at the upper and lower ends of the cylinder piston (13); the lower end of the cylinder body (14) is connected to the switch valve (3) through the intermediate connecting sleeve (2), and the switch valve (3) includes a valve core (34), a valve body (32) and a manifold (36), and the two ends of the valve body (32) are respectively provided with glue inlets. The lower end of the valve body (32) is connected to a manifold block (36), the two manifold cavities on the manifold block (36) are respectively connected to corresponding glue outlets, the lower end of the manifold block (36) is provided with a glue outlet, the two manifold cavities of the manifold block (36) are respectively connected to the glue outlets, the upper end of the valve body (32) is provided with two communicating holes, the two communicating holes are respectively connected to the upper end of the glue inlet, the lower end of the guide shaft (16) is connected to the valve core (34) via a connecting shaft, and the valve core (34) is installed at the communicating port position between the glue inlet and the manifold cavity, so as to isolate the glue inlet from the manifold cavity.

2. A cut-off dual-channel switch valve according to claim 1, characterized in that: The upper end of the cylinder body (14) is fixedly mounted with a cylinder end cover (11), the upper end of the cylinder piston (13) is fixedly connected to the piston rod (12), the cylinder end cover (11) is provided with a first guide through hole, the piston rod (12) passes through the first guide through hole of the cylinder end cover (11), and the two are slidably matched.

3. A cut-off dual-channel switch valve according to claim 2, characterized in that: A sealing ring is installed between the piston rod (12) and the inner wall of the first guide through hole of the cylinder end cover (11).

4. A cut-off dual-channel switch valve according to claim 1, characterized in that: A sealing sleeve (31) is installed in the communicating hole of the valve body (32), a through hole is provided on the sealing sleeve (31), and the connecting shaft passes through the through hole on the sealing sleeve (31) and is slidably matched with the sealing sleeve (31).

5. The cut-off dual-channel switch valve according to claim 1, characterized in that: A guide rod (35) is installed at the center of the glue outlet of the manifold block (36), and the lower end of the guide rod (35) extends out of the glue outlet.

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