Anti-bubble screw valve

Abstract

The utility model belongs to the technical field of screw valves, and particularly relates to an anti-bubble screw valve. The screw valve comprises a screw valve body and a glue storage container, the glue storage container comprises a glue storage cylinder and a piston; the glue storage cylinder is provided with an internal space, and an air inlet hole and a glue outlet hole which are communicated with the internal space; the piston is slidably mounted in the internal space and used for dividing the internal space into a glue storage space and a pressure space, the pressure space communicates with an external pressure pump through an air inlet hole, and the glue storage space communicates with an inlet of the screw valve body through a glue outlet hole; the piston comprises a first piston body and a second piston body coaxially connected with the first piston body, the second piston body abuts against the inner side wall of the inner space, an exhaust hole communicated with the pressure space is formed in the first piston body, and the second piston body is used for blocking the end, away from the pressure space, of the exhaust hole. According to the anti-bubble screw valve, no gas space is formed above the colloid, bubbles in the colloid in the colloid storage space are reduced, and the quality and stability of the colloid output by the screw valve body are guaranteed.

Description

Technical Field

[0001] The utility model belongs to the technical field of screw valves, in particular to an anti-bubble screw valve. Background Art

[0002] With the continuous development of electronic information technology, the demand for circuit boards is also increasing. In the manufacturing process of circuit boards, the circuit boards need to be glued. After the circuit boards are glued, they can prevent the components of the circuit boards from loosening and ensure the moisture-proof and insulation properties of the circuit boards.

[0003] As the degree of automation in the dispensing field increases, the demand for dispensing accuracy is also gradually increasing, and the contradiction between dispensing efficiency and dispensing accuracy has become more prominent. In existing dispensing valve mechanisms, a high-pressure pump generally drives the piston in the glue storage cylinder to pump the glue liquid from the storage cylinder to a screw pump, and then the screw pump is applied to the circuit board.

[0004] As the screw pump operates, the air pressure in the lower space of the rubber storage barrel constantly alternates between high and low pressure. As the pressure in the lower space fluctuates, the gas in the upper space flows through the gap between the piston and the inner wall of the storage barrel into the rubber liquid below, forming a cavity above the liquid. As the cavity above the rubber liquid continues to grow, and under the influence of the screw pump, the piston vibrates within the rubber storage barrel, resulting in bubbles and unstable discharge of the rubber liquid from the screw pump. Summary of the Invention

[0005] The utility model aims to solve the technical problems in the prior art in which gas in a glue storage cylinder causes bubbles in the colloid output by a screw pump and the glue output is unstable, and provides an anti-bubble screw valve.

[0006] In view of the above technical problems, the embodiment of the present utility model provides an anti-bubble screw valve, comprising a screw valve body and a glue storage container;

[0007] The glue storage container includes a glue storage cylinder and a piston. The glue storage cylinder is provided with an internal space and an air inlet hole and a glue outlet hole both connected to the internal space. The piston is slidably mounted in the internal space and is used to separate the internal space into a glue storage space and a pressure space. The pressure space is connected to an external pressure pump through the air inlet hole, and the glue storage space is connected to the inlet of the screw valve body through the glue outlet hole.

[0008] The piston includes a first plug body and a second plug body coaxially connected to the first plug body, the second plug body abuts against the inner wall of the internal space, the first plug body is provided with an exhaust hole connected to the pressure space, and the second plug body is used to block the end of the exhaust hole away from the pressure space.

[0009] Optionally, the exhaust hole is a side groove provided on the side wall of the first plug body.

[0010] Optionally, the outer diameter of the first plug body is equal to the outer diameter of the second plug body, and both the first plug body and the second plug body are interference-fitted in the internal space.

[0011] Optionally, the exhaust hole passes through the first plug body, and the length of the first plug body is greater than the length of the second plug body.

[0012] Optionally, the first plug body and the second plug body are an integrally formed part.

[0013] Optionally, a plurality of the exhaust holes are arranged in a circular shape at equal intervals on the first plug body.

[0014] Optionally, a joint is provided on the screw valve body, and the inlet is provided on the joint;

[0015] An external thread is provided on the outer wall of the joint, and an internal thread is provided on the inner wall of the glue outlet hole; the joint is inserted into the glue outlet hole, and the internal thread is threadably connected to the external thread.

[0016] Optionally, the glue storage cylinder includes a cylinder body and a cylinder cover detachably covering the cylinder body, the exhaust hole and the internal space are both provided on the cylinder body, and the air inlet hole is provided on the cylinder cover.

[0017] Optionally, the anti-bubble screw valve further includes a hose, and the air inlet is connected to an external pressure pump through the hose.

[0018] In the present invention, an external pressure pump injects pressurized gas into the pressure space through the air inlet. The colloid in the glue storage space, pushed by the piston, is then input into the screw valve body through the glue outlet. When the screw valve body outputs the colloid, the pressure in the glue storage space decreases, and the pressure in the pressure space becomes greater than the pressure in the glue storage space. As a result, the piston can press the colloid in the glue storage space through the glue outlet and into the screw valve body, increasing the pressure in the glue storage space.

[0019] After analysis, it is found that the pressure in the glue storage space constantly alternates between high pressure and low pressure. As the pressure in the glue storage space changes, the high-pressure gas in the pressure space will enter the colloid in the glue storage space through the gap between the piston and the inner wall of the glue storage container, and the gas above the colloid will continue to increase; in this application, the piston includes a first plug body and a second plug body coaxially connected, and the first plug body is provided with an exhaust hole connected to the pressure space, and the second plug body is a solid part and abuts against the inner wall of the internal space, so that the pressure gas in the pressure space will squeeze the colloid in the glue storage space through the second plug body, and the gas above the colloid will enter the exhaust hole through the gap between the second plug body and the inner wall of the glue storage barrel, and then be discharged to the pressure space through the exhaust hole; the bubble-proof screw valve will not form a gas space above the colloid, reduces the bubbles in the colloid in the glue storage space, and ensures the quality and stability of the colloid output by the screw valve body. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0021] Figure 1 This is a schematic diagram of an anti-bubble screw valve provided by one embodiment of the present utility model;

[0022] Figure 2 This is a schematic diagram of the explosion structure of a glue storage container with an anti-bubble screw valve provided by one embodiment of the utility model;

[0023] Figure 3 It is a structural schematic diagram of a piston of a glue storage container provided by one embodiment of the present utility model.

[0024] The reference numerals in the specification are as follows:

[0025] 1. Glue storage container; 11. Glue storage cylinder; 111. Internal space; 1111. Glue storage space; 1112. Pressure space; 112. Air inlet; 113. Glue outlet; 114. Cylinder body; 115. Cylinder cover; 12. Piston; 121. First plug body; 1211. Exhaust hole; 122. Second plug body; 2. Screw valve body. DETAILED DESCRIPTION

[0026] In order to make the technical problems, technical solutions and beneficial effects solved by the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0027] It should be understood that the terms "upper", "lower", "left", "right", "front", "back", "middle", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention.

[0028] like Figures 1 to 3 As shown, an anti-bubble screw valve provided by an embodiment of the present invention includes a screw valve body 2 and a glue storage container 1;

[0029] The glue storage container 1 includes a glue storage cylinder 11 and a piston 12. The glue storage cylinder 11 is provided with an internal space 111 and an air inlet hole 112 and a glue outlet hole 113 both connected to the internal space 111. The piston 12 is slidably installed in the internal space 111 and is used to separate the internal space 111 into a glue storage space 1111 and a pressure space 1112. The pressure space 1112 is connected to an external pressure pump (not shown in the figure) through the air inlet hole 112, and the glue storage space 1111 is connected to the inlet of the screw valve body 2 through the glue outlet hole 113. It can be understood that the air inlet hole 112 and the glue outlet hole 113 are respectively arranged at opposite ends of the glue storage cylinder 11.

[0030] The piston 12 includes a first plug body 121 and a second plug body 122 coaxially connected to the first plug body 121. The second plug body 122 abuts against the inner sidewall of the internal space 111. The first plug body 121 is provided with a vent hole 1211 connected to the pressure space 1112. The second plug body 122 is used to block the end of the vent hole 1211 away from the pressure space 1112. Preferably, the outer diameter of the first plug body 121 is equal to the outer diameter of the second plug body 122. Both the first plug body 121 and the second plug body 122 are interference fit within the internal space 111. The first plug body 121 and the second plug body 122 are integrally formed.

[0031] Specifically, an external pressure pump injects pressurized gas into the pressure space 1112 through the air inlet 112. The colloid in the glue storage space 1111 is pushed by the piston 12 and input into the screw valve body 2 through the glue outlet hole 113. When the screw valve body 2 outputs the colloid, the pressure in the glue storage space 1111 decreases, and the pressure in the pressure space 1112 is greater than the pressure in the glue storage space 1111. As a result, the piston 12 can press the colloid in the glue storage space 1111 into the screw valve body 2 through the glue outlet hole 113, and the pressure in the glue storage space 1111 increases.

[0032] After analysis, it is found that the pressure in the glue storage space 1111 is constantly replaced by high pressure and low pressure. As the pressure in the glue storage space 1111 changes, the high-pressure gas in the pressure space 1112 will enter the colloid in the glue storage space 1111 through the gap between the piston 12 and the inner wall of the glue storage container 1, and the gas above the colloid will continue to increase. In the present application, the piston 12 includes a first plug body 121 and a second plug body 122 coaxially connected. The first plug body 121 is provided with an exhaust hole 1211 connected to the pressure space 1112. The second plug body 122 is a solid part and is connected to the inner wall of the glue storage container 1. The inner wall of the internal space 111 abuts against the second plug body 122, so that the pressurized gas in the pressure space 1112 will squeeze the colloid in the glue storage space 1111 through the second plug body 122, and the gas above the colloid will enter the exhaust hole 1211 through the gap between the second plug body 122 and the inner wall of the glue storage cylinder 11, and then be discharged into the pressure space 1112 through the exhaust hole 1211; the bubble-proof screw valve will not form a gas space above the colloid, reduce the bubbles in the colloid in the glue storage space 1111, and ensure the quality and stability of the colloid output by the screw valve body 2.

[0033] To further illustrate, if the piston 12 in the present application only includes the second plug body 122, due to the small length of the second plug body 122, the second plug body 122 cannot stably push the colloid in the glue storage space 1111; in the present application, the piston 12 includes the design of the first plug body 121 and the second plug body 122, so that the piston 12 has a longer length, ensuring the stability of the piston 12 pushing the colloid in the glue storage space 1111.

[0034] In one embodiment, if Figures 1 to 3 As shown, the exhaust hole 1211 is a side groove provided on the side wall of the first plug body 121. It can be understood that the top of the side groove is an opening, the side of the side groove is also an opening, and the opening on the side of the side groove is blocked by the inner wall of the glue storage barrel 11. Specifically, since the gas above the colloid will flow upward through the gap between the second plug body 122 and the inner wall of the glue storage barrel 11, the side groove contacts the inner wall of the glue storage barrel 11, so that the gas in the gap between the second plug body 122 and the inner wall of the glue storage barrel 11 just flows into the side groove, and then flows into the pressure space 1112 through the side groove. In this embodiment, the bubbles in the colloid in the glue storage space 1111 are further reduced, thereby ensuring the quality and stability of the colloid output by the screw valve body 2.

[0035] In one embodiment, if Figures 1 to 3As shown, the exhaust hole 1211 passes through the first plug body 121, and the length of the first plug body 121 is greater than the length of the second plug body 122. It can be understood that the second plug body 122 is shorter and the first plug body 121 is longer, which ensures that the piston 12 can push the colloid while also improving the exhaust performance of the piston 12.

[0036] In one embodiment, if Figure 3 As shown, a plurality of the exhaust holes 1211 are arranged in an annular manner and at equal intervals on the first plug body 121. It can be understood that on a plane perpendicular to the axis of the piston 12, the arc angles between two adjacent exhaust holes 1211 are equal.

[0037] In one embodiment, if Figure 1 As shown, the screw valve body 2 is provided with a joint, and the inlet is provided on the joint;

[0038] The outer wall of the connector is provided with an external thread, and the inner wall of the glue outlet hole 113 is provided with an internal thread. The connector is inserted into the glue outlet hole 113, and the internal thread is threadedly connected to the external thread. As can be understood, the connector is inserted into the glue outlet hole 113 via the threaded connection of the internal thread and the external thread, thereby simplifying the assembly and disassembly of the glue storage cylinder 11 and the screw valve body 2.

[0039] In one embodiment, if Figure 1 and Figure 2 As shown, the rubber storage cylinder 11 includes a cylinder body 114 and a cylinder cover 115 that is detachably covered on the cylinder body 114. The exhaust hole 1211 and the internal space 111 are both provided on the cylinder body 114, and the air inlet 112 is provided on the cylinder cover 115. It is understood that the cylinder cover 115 and the cylinder body 114 can be detachably connected by a plug-in structure, a threaded structure, etc. The detachable connection between the cylinder body 114 and the cylinder cover 115 makes it easy for the user to open the cylinder cover 115 from the cylinder body 114, thereby facilitating the installation of the rubber into the internal space 111 of the cylinder body 114.

[0040] In one embodiment, the anti-bubble screw valve further includes a hose (not shown in the figure), and the air inlet 112 is connected to an external pressure pump through the hose.

[0041] The above is only an embodiment of the anti-bubble screw valve of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An anti-bubble screw valve, characterized in that: It includes a screw valve body and a glue storage container; The glue storage container includes a glue storage cylinder and a piston. The glue storage cylinder is provided with an internal space and an air inlet hole and a glue outlet hole both connected to the internal space. The piston is slidably mounted in the internal space and is used to separate the internal space into a glue storage space and a pressure space. The pressure space is connected to an external pressure pump through the air inlet hole, and the glue storage space is connected to the inlet of the screw valve body through the glue outlet hole. The piston includes a first plug body and a second plug body coaxially connected to the first plug body, the second plug body abuts against the inner wall of the internal space, the first plug body is provided with an exhaust hole connected to the pressure space, and the second plug body is used to block the end of the exhaust hole away from the pressure space.

2. The anti-bubble screw valve according to claim 1, characterized in that: The exhaust hole is a side groove arranged on the side wall of the first plug body.

3. The anti-bubble screw valve according to claim 1, characterized in that: The outer diameter of the first plug body is equal to the outer diameter of the second plug body, and both the first plug body and the second plug body are interference-fitted in the internal space.

4. The anti-bubble screw valve according to claim 1, characterized in that: The exhaust hole passes through the first plug body, and the length of the first plug body is greater than the length of the second plug body.

5. The anti-bubble screw valve according to claim 1, characterized in that: The first plug body and the second plug body are integrally formed parts.

6. The anti-bubble screw valve according to claim 1, characterized in that: A plurality of the exhaust holes are arranged in a circular manner and at equal intervals on the first plug body.

7. The anti-bubble screw valve according to claim 1, characterized in that: The screw valve body is provided with a joint, and the inlet is provided on the joint; An external thread is provided on the outer wall of the joint, and an internal thread is provided on the inner wall of the glue outlet hole; the joint is inserted into the glue outlet hole, and the internal thread is threadably connected to the external thread.

8. The anti-bubble screw valve according to claim 1, characterized in that: The rubber storage cylinder comprises a cylinder body and a cylinder cover detachably covering the cylinder body. The exhaust hole and the internal space are both arranged on the cylinder body, and the air inlet hole is arranged on the cylinder cover.

9. The anti-bubble screw valve according to claim 1, characterized in that: The anti-bubble screw valve further includes a hose, and the air inlet is connected to an external pressure pump through the hose.

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