A meterable concentric screw valve

Abstract

This utility model discloses a metering concentric screw valve, including a housing containing a motor; a valve body, with a rotor located at the axial center of the valve body at the output end of the motor. A coupling connects the rotor to the output end of the motor, transmitting the torque generated by the motor output to drive the rotor to rotate. The rotor consists of an integral rod body and rod head, with a double-threaded portion formed on the surface of the rod body. In this utility model, increasing the length of the rotor effectively adjusts the internal spatial layout of the cavity, allowing for smoother flow of adhesive within the cavity and a more uniform pressure distribution, thereby reducing the internal pressure and decreasing the possibility of adhesive leakage due to pressure. Furthermore, the rotor's thread structure is optimized and upgraded, changing the original single-layer thread structure to a double-layer thread structure, which provides a stronger force during rotor rotation.

Description

Technical Field

[0001] This utility model belongs to the field of concentric screw valve technology, specifically relating to a metering concentric screw valve. Background Technology

[0002] Concentric screw valves are typically used in industrial applications where precision in dispensing, coating, or potting adhesives is extremely critical, such as in the packaging of precision electronic components and the assembly of high-end medical devices. In these fields, their inherent characteristics ensure the stability of product quality. However, their stator-rotor design also introduces some significant drawbacks. When the valve body stops working, the adhesive can flow uncontrollably, failing to achieve an effective seal, which causes numerous production problems.

[0003] The problem arises primarily from the following factors. First, the rotor employs a single-layer threaded structure, which results in insufficient thrust during operation, leading to low dispensing pressure. This low pressure means that when operation ceases, there is insufficient counterforce to "hold" the adhesive, causing it to leak out. Second, the rotor's length is too short, altering the internal spatial structure of the cavity and increasing internal pressure. This excessive pressure, at the moment the valve stops operating, forces the adhesive to overcome any minor resistance and flow out from the valve. These factors intertwine to create a defect in the concentric screw valve's ability to seal and close the adhesive, affecting its effectiveness and efficiency in industrial production. Further design optimization is urgently needed to address these issues. Utility Model Content

[0004] The purpose of this invention is to provide a measurable concentric screw valve to solve the problem mentioned in the background art, where the current rotor design causes glue to leak out and is difficult to seal when the machine is stopped.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a metering concentric screw valve, comprising...

[0006] The outer casing contains a motor.

[0007] The valve body is located at the output end of the motor;

[0008] A rotor is provided at the axial center of the valve body. A coupling is connected between the rotor and the output end of the motor. The torque generated by the output end of the motor is transmitted through the coupling, thereby driving the rotor to rotate.

[0009] The rotor consists of an integral rod body and rod head. A double-threaded section is formed on the surface of the rod body. This double-threaded design allows for the rotation and propulsion of adhesive, creating a stable, pulsation-free flow. The metering function is achieved through the spacing of the double-threaded section; a larger spacing results in a larger amount of adhesive dispensed per revolution, while a smaller spacing results in a smaller amount. An external electronic scale measures the amount of adhesive dispensed per revolution, thus achieving the metering function. The rotor in this invention is longer than that of ordinary rotors on the market; the length of the rod body is greater than the length of the rod head, whereas in current rotor structures on the market, the lengths of the rod body and rod head are similar or equal.

[0010] Preferably, the valve body has a glue injection port on its side, and the glue injection port is connected to the position of the rod body.

[0011] Preferably, the outer shell is further provided with one end connected to an external pressure device, such as inserting a cylinder with a piston at the output end to discharge the glue inside, and the other end connected to the glue injection port of the valve body. The glue discharged from inside will enter the valve body and, driven by the motor, drive the rod to rotate. When the rod rotates, it will transport the glue towards the nozzle and discharge it.

[0012] Preferably, the end of the rod head has a flat keyway. The rod head is inserted into the coupling. To ensure a stable connection, the coupling should be provided with a flat key that corresponds to the flat keyway. The length of the rod body is twice the length of the rod head.

[0013] Preferably, a connecting plate is fixedly provided on the side of the valve body, and a clamping block is installed on it. The clamping block is sleeved on the glue packaging tube. The clamping block consists of a fixing plate fixed on the connecting plate and an adjusting plate provided on the side of the fixing plate. A stud penetrating the adjusting plate is fixedly provided at the end of the fixing plate, and a wing nut is screwed on the outside of the stud.

[0014] Preferably, the outer wall of the fixing plate is bonded with hook and loop fasteners, and the outer wall of the adjusting plate is bonded with Velcro, which is bonded to the hook and loop fasteners.

[0015] Preferably, the outer surface of the outer shell is provided with multiple heat dissipation slots, and the outer shell is a hollow cuboid structure.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] In this invention, increasing the length of the rotor effectively adjusts the internal spatial layout of the cavity, allowing the adhesive to flow more smoothly and the pressure distribution to be more uniform. This reduces the internal pressure of the cavity and lowers the possibility of adhesive leakage due to pressure. On the other hand, the rotor's thread structure is optimized and upgraded, changing the original single-layer thread structure to a double-layer thread structure. The double-layer thread provides a stronger force during rotor rotation, optimizing the thrust effect. The enhanced thrust can better control the flow of adhesive. When the valve body stops working, it can generate sufficient reverse force to "hold" the adhesive, preventing it from automatically flowing out. This effectively improves the sealing performance of the concentric screw valve and meets the needs of high-precision industrial applications. Attached Figure Description

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

[0019] Figure 2 This is a schematic diagram showing the position of the rotor of this utility model;

[0020] Figure 3 This is a schematic diagram of the rotor structure of this utility model;

[0021] Figure 4 This is a top view of the clamping block in this utility model.

[0022] In the picture:

[0023] 100. Housing; 101. Coupling; 102. Valve body; 103. Nozzle; 104. Rod; 105. Motor; 106. Double threaded part; 107. Rod head;

[0024] 200. Glue packaging tube; 201. Fixing plate; 202. Connecting plate; 203. Adjusting plate; 204. Stud; 205. Velcro; 206. Spring; 207. Hook and loop fastener; 208. Wing nut. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Please see Figures 1 to 4 This utility model provides a technical solution: a measurable concentric screw valve, comprising...

[0027] The outer casing 100 contains a motor 105.

[0028] Valve body 102 is located at the output end of motor 105;

[0029] A rotor is provided at the axial position of the valve body 102. A coupling 101 is connected between the rotor and the output end of the motor 105. The torque generated by the output end of the motor 105 is transmitted through the coupling 101, thereby driving the rotor to rotate.

[0030] The rotor consists of an integral rod body 104 and a rod head 107. A double-threaded portion 106 is formed on the surface of the rod body 104. This double-threaded portion 106 allows for the rotation and propulsion of adhesive, creating a stable, pulsation-free flow. The metering function is achieved through the spacing of the double-threaded portions 106. A larger spacing results in a larger amount of adhesive dispensed per revolution of the motor 105, while a smaller spacing results in a smaller amount of adhesive dispensed per revolution. An external electronic scale measures the amount of adhesive dispensed per revolution, thus achieving the metering function. The rotor in this invention is longer than that of ordinary rotors on the market; the length of the rod body 104 is greater than the length of the rod head 107. In current rotor structures on the market, the lengths of the rod body 104 and the rod head 107 are similar or equal.

[0031] In this embodiment, preferably, the valve body 102 has a glue injection port on its side, and the glue injection port is connected to the position of the rod body 104.

[0032] In this embodiment, preferably, the outer shell 100 is further provided with a 200. One end of the 200 is connected to an external pressure device. For example, a cylinder with a piston at the output end can be inserted into the 200 to discharge the glue inside the 200. The other end of the 200 is connected to the glue injection port of the valve body 102. The glue discharged from the 200 will enter the valve body 102 and, driven by the motor 105, drive the rod 104 to rotate. When the rod 104 rotates, it will transport the glue toward the nozzle 103 and discharge it.

[0033] In this embodiment, preferably, a flat keyway is formed at the end of the rod head 107. The rod head 107 is inserted into the coupling 101. To ensure a stable connection, a flat key corresponding to the flat keyway should be provided in the coupling 101. The length of the rod body 104 is twice the length of the rod head 107.

[0034] In this embodiment, preferably, a connecting plate 202 is also fixedly provided on the side of the valve body 102, and a clamping block is installed on the 202. The clamping block is sleeved on the glue packaging tube 200. The clamping block consists of a fixing plate 201 fixed on the connecting plate 202 and an adjusting plate 203 provided on the side of the fixing plate 201. A stud 204 penetrating the adjusting plate 203 is fixedly provided at the end of the fixing plate 201, and a wing nut 208 is screwed on the outside of the stud 204. By setting the adjusting plate 203, glue packaging tubes 200 of different diameters can be clamped.

[0035] In this embodiment, preferably, the outer wall of the fixing plate 201 is bonded with hook and loop fasteners 207, and the outer wall of the adjusting plate 203 is bonded with Velcro 205. The Velcro 205 is bonded to the hook and loop fasteners 207 to achieve full wrapping of the glue packaging tube 200. This structure can be used selectively.

[0036] In this embodiment, preferably, the outer surface of the outer shell 100 is provided with a plurality of heat dissipation slots, and the outer shell 100 is a hollow cuboid structure.

[0037] Although embodiments of the present invention have been shown and described (see the detailed description above), it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A metering concentric screw valve, comprising: The outer casing (100) contains a motor (105); The valve body (102) is located at the output end of the motor (105); Its features are: The valve body (102) has a rotor at its axial position, and a coupling (101) is connected between the rotor and the output end of the motor (105). The rotor is composed of an integral rod body (104) and a rod head (107), wherein a double threaded portion (106) is formed on the surface of the rod body (104); the length of the rod body (104) is greater than the length of the rod head (107).

2. The meterable concentric screw valve according to claim 1, characterized in that: The valve body (102) has a glue injection port on its side, which is connected to the position of the rod body (104).

3. A meterable concentric screw valve according to claim 2, characterized in that: The outer shell (100) is also provided with an adhesive packaging tube (200), one end of which is connected to an external pressure device, and the other end of which is connected to the glue injection port of the valve body (102).

4. A meterable concentric screw valve according to claim 1, characterized in that: The end of the rod head (107) has a flat keyway, and the rod head (107) is inserted into the coupling (101). The length of the rod body (104) is twice the length of the rod head (107).

5. A meterable concentric screw valve according to claim 1, characterized in that: A connecting plate (202) is also fixed to the side of the valve body (102), and a clamping block is installed on the (202). The clamping block is sleeved on the glue packaging tube (200). The clamping block consists of a fixing plate (201) fixed to the connecting plate (202) and an adjusting plate (203) set on the side of the fixing plate (201). A stud (204) penetrating the adjusting plate (203) is fixed to the end of the fixing plate (201), and a wing nut (208) is screwed on the outside of the stud (204).

6. A meterable concentric screw valve according to claim 5, characterized in that: The outer wall of the fixing plate (201) is bonded with hook and loop fasteners (207), and the outer wall of the adjusting plate (203) is bonded with Velcro (205), which is bonded to the hook and loop fasteners (207).

7. A meterable concentric screw valve according to claim 1, characterized in that: The outer surface of the outer shell (100) is provided with a plurality of heat dissipation slots, and the outer shell (100) is a hollow cuboid structure.

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