Flow-regulated etching liquid dispensing tube valve assembly

Abstract

The utility model relates to etching liquid distribution pipe valve assembly of adjustable flow belongs to etching liquid distribution pipe valve assembly technical field. The etching liquid distribution pipe valve assembly of adjustable flow, include: regulating valve and go through the pipe, the top fixedly connected with the sheath of regulating valve, the top of sheath is equipped with the cover, still include maintenance mechanism, maintenance mechanism includes the through -hole of opening in the top of cover, the inner wall sliding connection of through -hole has the block and the block, the bottom of block contacts in the top of block, through the block, block and through -hole mutual match, realized the top of cover to open fast, compared with the present need to make protective shell and regulating valve separate again to the worm wheel and the worm are smeared with lubricating oil, lead to inconvenient maintenance, this method need not to make cover and sheath separate can smear lubricating oil to the worm wheel and the worm in sheath, and the operation of maintenance worm wheel and worm is more convenient.

Description

Technical Field

[0001] This utility model relates to the technical field of etching solution distribution pipe valve assembly, and in particular to an adjustable flow etching solution distribution pipe valve assembly. Background Technology

[0002] In PCB manufacturing, because circuit patterns on PCBs typically have varying line widths and spacings, a motor, worm gear, and worm shaft work together to automatically regulate the flow rate of the etching solution in the etching solution distribution valve assembly. This precisely controls the distribution of the etching solution onto the PCB, allowing it to remove unwanted portions of the copper foil and form the circuit lines. The etching solution distribution valve assembly typically consists of an inlet pipe, a regulating valve, a distribution pipe, a pressure sensor, a flow sensor, and a control device.

[0003] To maintain stable etching quality, the control device needs to monitor parameters such as concentration and temperature in real time, and frequently adjust the etching solution flow rate through the cooperation of motor, worm gear and worm.

[0004] Most existing control valves use fully enclosed housings that are bolted to the control valve to tightly protect the worm gear and worm. However, the worm gear and worm are prone to wear during frequent adjustments. Therefore, the bolts need to be moved away from the control valve, and the protective housing on the control valve needs to be opened to expose the worm gear and worm inside the housing for lubrication. This makes it too inconvenient to maintain the worm gear and worm. Utility Model Content

[0005] Therefore, it is necessary to provide an adjustable flow etching solution distribution valve assembly to address the problem that requires moving the bolts away from the regulating valve, thereby opening the protective shell on the regulating valve to expose the worm gear and worm inside the protective shell for lubrication, which easily leads to inconvenience in maintaining the worm gear and worm.

[0006] It includes: a regulating valve and a through pipe, wherein a protective shell is fixedly connected to the top of the regulating valve and a cover is provided on the top of the protective shell; it also includes a maintenance mechanism, wherein the maintenance mechanism includes a through hole opened on the top of the cover, and a sealing block and a plug are slidably connected to the inner wall of the through hole, wherein the bottom of the plug contacts the top of the sealing block.

[0007] In one embodiment, a limiting rod is slidably connected to the inner wall of the cover, the surface of the limiting rod is slidably connected to the inner wall of the sealing block, and a limiting block is hinged to the inner wall of the limiting rod, with the end of the limiting block contacting the bottom of the cover. Through the cooperation of the limiting rod and the limiting block, the sealing block is locked inside the cover, thereby ensuring stable sealing of the through hole and thus guaranteeing the sealing and protection effect on the worm gear and worm.

[0008] In one embodiment, a sealing gasket is embedded in the front end of the cover, and the surface of the sealing block is slidably connected to the inner wall of the sealing gasket. The sealing gasket is used to seal the connection between the cover and the sealing block, preventing dust from entering the housing through the gap between the cover and the sealing block.

[0009] In one embodiment, the inner wall of the limiting rod is slidably connected with a positioning block and an anti-sliding block, the surface of the positioning block is engaged with the inner wall of the limiting block, and the top of the anti-sliding block contacts the bottom of the positioning block.

[0010] In one embodiment, an anti-slip rod is slidably connected to the inner wall of the limiting rod, and the surface of the anti-slip rod is slidably connected to the inner wall of the positioning block and the anti-slip block in sequence.

[0011] In one embodiment, a spring is fixedly connected to the bottom of the positioning block, and the bottom end of the spring is fixedly connected to the inner wall of the limiting rod.

[0012] In one embodiment, two guide rods are fixedly connected to the top of the cover, and the inner wall of the limiting rod is slidably connected to the surface of the guide rod. The guide rods limit the upward movement height of the limiting rod, preventing the limiting rod from detaching from the cover.

[0013] In one embodiment, a limiting groove is formed in the inner wall of the cover, and the surface of the sealing block is slidably connected to the inner wall of the limiting groove. The limiting groove limits the movement of the sealing block, preventing it from falling out of the cover.

[0014] Beneficial effects

[0015] 1. By using the cooperation of the plug, sealing block and through hole, the top of the cover can be opened quickly. Compared with the existing method that requires separating the protective shell from the regulating valve and then applying lubricating oil to the worm gear and worm, which makes maintenance inconvenient, this method does not require separating the cover from the protective shell to apply lubricating oil to the worm gear and worm inside the protective shell, making the maintenance of the worm gear and worm more convenient.

[0016] 2. By cooperating with the anti-slip rod, anti-slip block and positioning block, the locking of the limit block is released, thereby allowing the limit rod to move away from the sealing block, and thus quickly releasing the locking of the sealing block. This makes it easy to quickly open the top of the cover, and facilitate the application of lubricating oil to the worm gear and worm inside the protective shell. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is an exploded view of the protective shell and cover of this utility model;

[0020] Figure 3 This is an exploded view of the covering, sealing block and blocking block of this utility model;

[0021] Figure 4 This utility model Figure 3 Enlarged view of point A in the middle;

[0022] Figure 5 This utility model Figure 3 Enlarged view of point B in the middle.

[0023] Figure label:

[0024] 100. Regulating valve; 200. Through pipe; 300. Protective shell; 400. Cover; 500. Maintenance mechanism; 501. Through hole; 502. Sealing block; 503. Plug; 504. Sealing gasket; 505. Limiting rod; 506. Limiting block; 507. Positioning block; 508. Anti-slip block; 509. Anti-slip rod; 510. Spring; 511. Guide rod; 512. Limiting groove. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0026] The following is combined with Figures 1-5 This invention describes an adjustable flow rate etching solution distribution pipe valve assembly.

[0027] In one embodiment, an adjustable flow rate etching solution distribution valve assembly includes: a regulating valve 100 and a through pipe 200, wherein a protective shell 300 is fixedly connected to the top of the regulating valve 100, and a cover 400 is provided on the top of the protective shell 300; it also includes a maintenance mechanism 500, wherein the maintenance mechanism 500 includes a through hole 501 opened on the top of the cover 400, and a sealing block 502 and a plug 503 are slidably connected to the inner wall of the through hole 501, wherein the bottom of the plug 503 contacts the top of the sealing block 502.

[0028] It should be noted that: a worm gear is rotatably connected to the inner wall of the protective shell 300, a servo motor is fixedly connected to one end of the worm gear, the surface of the servo motor is mounted on the inner bottom wall of the protective shell 300, a worm wheel is meshed with the surface of the worm gear, and the bottom end of the worm wheel is fixedly connected to the top of the valve stem.

[0029] The pressure sensor and flow sensor are installed inside the pipe 200. The connecting wires of the pressure sensor and flow sensor are installed on the PLC controller. There are two pipes 200. One pipe 200 is connected to the inlet pipe through a flange. The other end of the inlet pipe is connected to the outlet of the centrifugal pump through a flange. The inlet of the centrifugal pump is connected to the outlet of the etching solution storage container through a flange. The other pipe 200 is connected to the distribution pipe through a flange.

[0030] The model of regulating valve 100 can be Q341F-16P. The specific model of regulating valve 100 can be selected according to actual needs, which will not be elaborated here.

[0031] When etching solution needs to be delivered to the PCB processing station, the centrifugal pump draws the etching solution from the storage container and delivers it through the inlet pipe, through pipe 200, regulating valve 100 and distribution pipe. The centrifugal pump provides power to maintain a certain pressure and flow rate of the etching solution in the pipeline, so as to ensure that the etching solution can reach each etching station smoothly and then process the PCB.

[0032] The flow sensor monitors the flow rate of the etching solution in real time and feeds the flow signal back to the PLC controller, so that the control system on the PLC controller can adjust the regulating valve 100 according to the actual situation to achieve precise control of the etching solution flow rate.

[0033] Pressure sensors are used to measure the pressure of the etching solution in the pipeline. By monitoring pressure changes, it is possible to determine whether there are any abnormalities such as blockages or leaks in the pipeline. At the same time, pressure data is provided to the PLC controller so that the delivery pressure of the etching solution can be adjusted to ensure the stability of the etching process.

[0034] When it is necessary to adjust the flow rate of etching solution in the distribution pipe, the PLC controller receives the information and automatically starts the servo motor. The output shaft of the servo motor rotates, which drives the worm gear to rotate. The rotating worm gear drives the valve stem to rotate at a suitable angle, thereby adaptively adjusting the flow rate of etching solution in the regulating valve 100.

[0035] like Figure 2 , Figure 4 and Figure 5As shown, a limiting rod 505 is slidably connected to the inner wall of the cover 400. The surface of the limiting rod 505 is slidably connected to the inner wall of the sealing block 502. A limiting block 506 is hinged to the inner wall of the limiting rod 505. The end of the limiting block 506 contacts the bottom of the cover 400. A positioning block 507 and an anti-slip block 508 are slidably connected to the inner wall of the limiting rod 505. The surface of the positioning block 507 is engaged with the inner wall of the limiting block 506. The top of the anti-slip block 508 contacts the positioning block. At the bottom of 507, an anti-slip rod 509 is slidably connected to the inner wall of the limiting rod 505. The surface of the anti-slip rod 509 is slidably connected to the inner wall of the positioning block 507 and the anti-slip block 508. A spring 510 is fixedly connected to the bottom of the positioning block 507. The bottom end of the spring 510 is fixedly connected to the inner wall of the limiting rod 505. Two guide rods 511 are fixedly connected to the top of the cover 400. The inner wall of the limiting rod 505 is slidably connected to the surface of the guide rod 511.

[0036] In this embodiment, after the worm gear and worm are coated with lubricating oil, the sealing block 502 is pushed to abut against the inner wall of the through hole 501, the plug 503 is placed in the through hole 501 and abuts against the top of the sealing block 502, the limiting rod 505 is pushed down into the sealing block 502, so that the lower end of the surface of the limiting rod 505 is located at the bottom of the sealing block 502, the limiting block 506 is rotated so that the end of the limiting block 506 abuts against the bottom of the sealing block 502, the pressure on the positioning block 507 is loosened, the elastic force of the spring 510 pushes the positioning block 507 up and gets stuck in the limiting block 506, the anti-slip block 508 is pushed to move laterally so that the top of the anti-slip block 508 abuts against the bottom of the positioning block 507, the anti-slip rod 509 is pushed down and slides into the positioning block 507 and the anti-slip block 508 in sequence, so that the sealing block 502 is locked in the cover 400.

[0037] like Figure 3 As shown, a sealing gasket 504 is embedded in the front end of the cover 400, and the surface of the sealing block 502 is slidably connected to the inner wall of the sealing gasket 504.

[0038] It should be noted that: sealing block 502, plug block 503, sealing gasket 504, anti-slip block 508 and anti-slip rod 509 are all silicone rubber components, which have high elasticity and excellent sealing performance.

[0039] like Figure 2 As shown, a limiting groove 512 is provided on the inner wall of the cover 400, and the surface of the sealing block 502 is slidably connected to the inner wall of the limiting groove 512.

[0040] Working principle: Pull the plug 503 away from the through hole 501, pull the anti-slip rod 509 up away from the anti-slip block 508 and the positioning block 507, push the positioning block 507 down away from the limiting block 506, push the limiting block 506 to rotate to a suitable angle, so that the limiting block 506 is housed in the limiting rod 505, pull the limiting rod 505 up away from the sealing block 502, so that the through hole 501 is opened, and lubricating oil can be applied to the worm gear and worm inside the protective shell 300.

[0041] It should be noted that the regulating valve 100, the through pipe 200, the protective shell 300, the cover 400, the spring 510, the worm gear, the worm wheel, the pressure sensor, the flow sensor, and the servo motor mentioned above are all components with relatively mature existing technologies. The specific models can be selected according to actual needs. At the same time, the pressure sensor, the flow sensor, and the servo motor can be powered by the built-in power supply or by the mains power. The specific power supply method is selected according to the situation and will not be elaborated here.

[0042] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. An adjustable flow rate etching solution distribution pipe valve assembly, characterized in that, include: A regulating valve (100) and a through pipe (200) are provided. A protective shell (300) is fixedly connected to the top of the regulating valve (100), and a cover (400) is provided on the top of the protective shell (300). It also includes a maintenance mechanism (500), which includes a through hole (501) opened on the top of the cover (400), and a sealing block (502) and a plug (503) are slidably connected to the inner wall of the through hole (501), with the bottom of the plug (503) contacting the top of the sealing block (502).

2. The adjustable flow rate etching solution distribution valve assembly according to claim 1, characterized in that, The inner wall of the cover (400) is slidably connected to a limiting rod (505), the surface of the limiting rod (505) is slidably connected to the inner wall of the sealing block (502), the inner wall of the limiting rod (505) is hinged to a limiting block (506), and the end of the limiting block (506) contacts the bottom of the cover (400).

3. The adjustable flow rate etching solution distribution valve assembly according to claim 1, characterized in that, The front end of the cover (400) is embedded with a sealing gasket (504), and the surface of the sealing block (502) is slidably connected to the inner wall of the sealing gasket (504).

4. The adjustable flow rate etching solution distribution valve assembly according to claim 2, characterized in that, The inner wall of the limiting rod (505) is slidably connected to a positioning block (507) and an anti-slip block (508). The surface of the positioning block (507) is engaged with the inner wall of the limiting block (506), and the top of the anti-slip block (508) contacts the bottom of the positioning block (507).

5. The adjustable flow rate etching solution distribution valve assembly according to claim 2, characterized in that, The inner wall of the limiting rod (505) is slidably connected to an anti-slip rod (509), and the surface of the anti-slip rod (509) is slidably connected to the inner wall of the positioning block (507) and the anti-slip block (508) in sequence.

6. The adjustable flow rate etching solution distribution valve assembly according to claim 4, characterized in that, A spring (510) is fixedly connected to the bottom of the positioning block (507), and the bottom end of the spring (510) is fixedly connected to the inner wall of the limiting rod (505).

7. The adjustable flow rate etching solution distribution valve assembly according to claim 2, characterized in that, The top of the cover (400) is fixedly connected to two guide rods (511), and the inner wall of the limiting rod (505) is slidably connected to the surface of the guide rods (511).

8. The adjustable flow rate etching solution distribution valve assembly according to claim 1, characterized in that, The inner wall of the cover (400) is provided with a limiting groove (512), and the surface of the sealing block (502) is slidably connected to the inner wall of the limiting groove (512).

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