Large-flow double-liquid screw valve

Abstract

The utility model discloses a large-flow double-liquid screw valve which comprises two vertically arranged stators and two rotors correspondingly arranged in the stators, the outer side of the upper end of each stator is provided with a glue inlet pipe provided with a glue inlet, the upper end of the vertically extending glue inlet pipe is connected with a sealing block provided with a mounting through hole, and the upper end of the glue inlet pipe is provided with a glue outlet. The lower end of the connecting rod with the upper end connected with the driving assembly sequentially penetrates through a mounting through hole in the sealing block and the glue inlet pipe and is connected with the rotor, a plurality of sealing rings arranged on the outer side of the connecting rod in a sleeving mode are arranged in the mounting through hole, and a distance ring is arranged between any two adjacent sealing rings sequentially arranged in the vertical direction. A lubricating cavity used for being filled with grease is formed between the inner wall of each spacer ring and the outer circumferential face of the connecting rod. The connecting rod can be lubricated in real time, the sealing performance can be improved, the situation that glue overflows due to the fact that the glue inlet pressure is too large for a long time is avoided, and the glue outlet precision is further guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of glue dispensing, in particular to a large-flow double-liquid screw valve. Background Art

[0002] The dual-liquid screw valve is a precision screw valve suitable for dispensing two types of medium and high viscosity glues, and is one of the main components of the dispensing equipment. It mainly includes two sets of drive components and a screw valve body component. The screw valve body component includes a threaded rotor and a stator. The threaded rotor and the stator can be combined to form a sealed cavity. Under the action of the drive component, the threaded rotor rotates to allow the glue in the cavity to be pushed and transmitted. The glue in the two cavities is pushed to the confluence valve block at the bottom and then is pushed to the mixing tube for dispensing. However, in the existing dual-liquid screw valve, especially in the process of dispensing high-viscosity glue with a large flow rate, due to the excessive pressure of the glue itself, it is easy to cause the seal to fail and cause the glue to overflow, thereby affecting the accuracy of the glue. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a large-flow double-liquid screw valve, which can achieve real-time lubrication of the connecting rod and improve the sealing performance, avoid glue overflow due to excessive glue feeding pressure for a long time, and further ensure the accuracy of glue output.

[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is: a large-flow double-liquid screw valve, comprising: 2 vertically arranged stators and 2 rotors correspondingly arranged inside the stators, a glue flow channel is formed between the inner wall of the stator and the corresponding rotor, the upper end of each rotatable rotor is connected to a driving assembly through a connecting rod, a glue inlet pipe with a glue inlet is arranged on the outer side of the upper end of each stator, the upper end of the vertically extending glue inlet pipe is connected to a sealing block with a mounting through hole, the lower end of the connecting rod connected to the driving assembly at the upper end passes through the mounting through hole and the glue inlet pipe on the sealing block in turn and is connected to the rotor, a plurality of sealing rings mounted on the outer side of the connecting rod are arranged in the mounting through hole, a spacer ring is arranged between any two adjacent sealing rings arranged in sequence in the vertical direction, and a lubrication cavity for filling grease is formed between the inner wall of each spacer ring and the outer circumferential surface of the connecting rod.

[0005] The further improved scheme in the above technical scheme is as follows:

[0006] 1. In the above scheme, there are three sealing rings and two lubrication chambers.

[0007] 2. In the above solution, the inner walls at both ends of the mounting through hole each have a flange portion extending radially inward, and a plurality of the sealing rings are disposed between two of the flange portions.

[0008] 3. In the above solution, the sealing ring is a rubber sealing ring or a universal seal ring.

[0009] 4. In the above scheme, a mounting bracket is provided between the sealing block and the driving assembly, the driving assembly is mounted on the mounting bracket, and the connecting rod and the mounting bracket are rotatably matched through at least two vertically arranged bearings.

[0010] 5. In the above scheme, a rubber guide block is connected between the lower ends of the two stators, the lower end of the rubber guide block is connected to a rubber mixing tube, and the lower ends of the two rubber flow channels are connected to the rubber mixing tube through a rubber guide flow channel opened in the rubber guide block.

[0011] 6. In the above solution, the glue inlet is connected to the upper end of the corresponding glue flow channel through a glue flow channel formed between the inner wall of the glue inlet pipe and the connecting rod.

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

[0013] The utility model discloses a large-flow double-liquid screw valve, in which the upper end of the vertically extending glue inlet pipe is connected to a sealing block with a mounting through hole, the lower end of the connecting rod connected to the driving assembly at the upper end passes through the mounting through hole and the glue inlet pipe on the sealing block in sequence and is connected to the rotor, a plurality of sealing rings sleeved on the outside of the connecting rod are arranged in the mounting through hole, a spacer ring is arranged between any two adjacent sealing rings arranged in sequence in the vertical direction, a lubrication cavity for filling grease is formed between the inner wall of each of the spacer rings and the outer circumferential surface of the connecting rod, which can realize real-time lubrication of the connecting rod and improve the sealing performance on the basis of ensuring the accuracy of the stator rotating with the connecting rod, avoid the situation where glue overflows due to excessive glue inlet pressure for a long time, and further ensure the accuracy of glue output. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Attached Figure 1 This is a schematic diagram of the overall structure of the large flow dual-liquid screw valve of the utility model;

[0015] Attached Figure 2 It is a cross-sectional schematic diagram of a large flow dual-liquid screw valve of the utility model;

[0016] Attached Figure 3 For the utility model Figure 2 A magnified view of the layout structure in .

[0017] In the above drawings: 1. stator; 2. rotor; 3. glue flow channel; 4. connecting rod; 5. driving assembly; 6. glue inlet pipe; 61. glue inlet port; 62. glue inlet flow channel; 7. sealing block; 71. mounting through hole; 8. sealing ring; 9. spacer ring; 10. lubrication chamber; 11. flange; 12. mounting bracket; 13. bearing; 14. glue guide block; 141. glue guide flow channel; 15. glue mixing pipe. DETAILED DESCRIPTION

[0018] The present invention can be further understood through the specific embodiments given below, but they are not intended to limit the present invention.

[0019] Embodiment 1: A large-flow dual-liquid screw valve comprises: two vertically arranged stators 1 and two rotors 2 correspondingly arranged inside the stator 1, a glue flow channel 3 is formed between the inner wall of the stator 1 and the corresponding rotor 2, the upper end of each rotatable rotor 2 is connected to a driving component 5 through a connecting rod 4, a glue inlet pipe 6 with a glue inlet 61 is arranged on the outer side of the upper end of each stator 1, the upper end of the vertically extending glue inlet pipe 6 is connected to a sealing block 7 with a mounting through hole 71, the lower end of the connecting rod 4 connected to the driving component 5 at the upper end passes through the mounting through hole 71 and the glue inlet pipe 6 on the sealing block 7 in sequence and is connected to the rotor 2, a plurality of sealing rings 8 sleeved on the outer side of the connecting rod 4 are arranged in the mounting through hole 71, a spacer ring 9 is arranged between any two adjacent sealing rings 8 arranged in sequence in the vertical direction, and a lubrication cavity 10 for filling grease is formed between the inner wall of each spacer ring 9 and the outer circumferential surface of the connecting rod 4.

[0020] There are three sealing rings 8 and two lubrication chambers 10; the inner walls at both ends of the mounting through hole 71 each have a flange portion 11 pointing radially inward, and a plurality of sealing rings 8 are disposed between the two flange portions 11; the sealing ring 8 is a rubber sealing ring.

[0021] Embodiment 2: A large-flow dual-liquid screw valve comprises: two vertically arranged stators 1 and two rotors 2 correspondingly arranged inside the stator 1, a glue flow channel 3 is formed between the inner wall of the stator 1 and the corresponding rotor 2, the upper end of each rotatable rotor 2 is connected to a driving component 5 through a connecting rod 4, a glue inlet pipe 6 with a glue inlet 61 is arranged on the outer side of the upper end of each stator 1, and a sealing block 7 with a mounting through hole 71 is connected to the upper end of the vertically extending glue inlet pipe 6, the lower end of the connecting rod 4 connected to the driving component 5 at the upper end passes through the mounting through hole 71 and the glue inlet pipe 6 on the sealing block 7 in sequence and is connected to the rotor 2, a plurality of sealing rings 8 sleeved on the outer side of the connecting rod 4 are arranged in the mounting through hole 71, a spacer ring 9 is arranged between any two adjacent sealing rings 8 arranged in sequence in the vertical direction, and a lubrication cavity 10 for filling grease is formed between the inner wall of each spacer ring 9 and the outer circumferential surface of the connecting rod 4.

[0022] The sealing ring 8 is a pan seal ring;

[0023] A mounting bracket 12 is provided between the sealing block 7 and the driving assembly 5, and the driving assembly 5 is mounted on the mounting bracket 12. The connecting rod 4 and the mounting bracket 12 are rotatably matched through at least two vertically arranged bearings 13;

[0024] A rubber guide block 14 is connected between the lower ends of the two stators 1, and a rubber mixing tube 15 is connected to the lower end of the rubber guide block 14. The lower ends of the two rubber flow channels 3 are connected to the rubber mixing tube 15 through a rubber guide channel 141 opened in the rubber guide block 14.

[0025] The glue inlet 61 is communicated with the upper end of the corresponding glue flow channel 3 via a glue flow channel 62 formed between the inner wall of the glue inlet pipe 6 and the connecting rod 4 .

[0026] When the large-flow dual-liquid screw valve is used, it can realize real-time lubrication of the connecting rod and improve the sealing performance on the basis of ensuring the accuracy of the stator rotating with the connecting rod, avoid the overflow of glue due to excessive glue feeding pressure for a long time, and further ensure the accuracy of glue output.

[0027] The above embodiments are only for illustrating the technical concept and features of the utility model, and their purpose is to enable people familiar with the technology to understand the content of the utility model and implement it accordingly, and they cannot be used to limit the protection scope of the utility model. Any equivalent changes or modifications made according to the spirit of the utility model should be included in the protection scope of the utility model.

Claims

1. A large flow dual-liquid screw valve, comprising: Two vertically arranged stators (1) and two rotors (2) correspondingly arranged inside the stators (1), a glue flow channel (3) is formed between the inner wall of the stator (1) and the corresponding rotor (2), the upper end of each rotatable rotor (2) is connected to a driving assembly (5) through a connecting rod (4), and is characterized in that: a glue inlet pipe (6) with a glue inlet port (61) is arranged on the outer side of the upper end of each stator (1), and a sealing block with a mounting through hole (71) is connected to the upper end of the vertically extending glue inlet pipe (6) (7), the lower end of the connecting rod (4) whose upper end is connected to the driving assembly (5) passes through the mounting through hole (71) and the rubber inlet pipe (6) on the sealing block (7) in sequence and is connected to the rotor (2), a plurality of sealing rings (8) are arranged in the mounting through hole (71) and are sleeved on the outer side of the connecting rod (4), a spacer ring (9) is arranged between any two adjacent sealing rings (8) arranged in sequence in the vertical direction, and a lubrication cavity (10) for filling grease is formed between the inner wall of each spacer ring (9) and the outer circumferential surface of the connecting rod (4).

2. The large flow dual-liquid screw valve according to claim 1 is characterized in that: Three sealing rings (8) are provided, and two lubrication chambers (10) are provided.

3. The large flow dual-liquid screw valve according to claim 1 is characterized in that: The inner walls at both ends of the mounting through hole (71) each have a flange portion (11) facing inward in the radial direction, and a plurality of sealing rings (8) are arranged between two of the flange portions (11).

4. The large flow dual-liquid screw valve according to claim 1 is characterized in that: The sealing ring (8) is a rubber sealing ring or a universal seal ring.

5. The large flow dual-liquid screw valve according to claim 1 is characterized in that: A mounting bracket (12) is provided between the sealing block (7) and the driving assembly (5), the driving assembly (5) is mounted on the mounting bracket (12), and the connecting rod (4) and the mounting bracket (12) are rotatably engaged via at least two vertically arranged bearings (13).

6. The large flow dual-liquid screw valve according to claim 1, characterized in that: A rubber guide block (14) is connected between the lower ends of the two stators (1), and a rubber mixing tube (15) is connected to the lower end of the rubber guide block (14). The lower ends of the two rubber flow channels (3) are respectively connected to the rubber mixing tube (15) via a rubber guide flow channel (141) opened in the rubber guide block (14).

7. The large flow dual-liquid screw valve according to claim 1, characterized in that: The glue inlet (61) is connected to the upper end of the corresponding glue flow channel (3) via a glue flow channel (62) formed between the inner wall of the glue inlet pipe (6) and the connecting rod (4).

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