High-flow dual-liquid screw valve

Abstract

A high-flow dual-liquid screw valve comprises two stators vertically disposed and two rotors correspondingly disposed inside the stators, wherein an adhesive intake tube having an adhesive inlet is provided on the outer side of the upper end of each stator; a sealing block provided with a mounting through hole is connected to the upper end of each adhesive intake tube extending vertically; the lower end of each connecting rod, the upper end of which is connected to a driving assembly, sequentially passes through the mounting through hole in the corresponding sealing block and the corresponding adhesive intake tube, and is then connected to the corresponding rotor; several sealing rings sleeved on the outer side of each connecting rod are provided inside the corresponding mounting through hole; a spacer ring is provided between any two adjacent sealing rings that are sequentially vertically arranged; and a lubrication cavity configured to be filled with grease is formed between the inner wall of each spacer ring and the outer circumferential surface of the corresponding connecting rod. The present application can realize the real-time lubrication of the connecting rods, and improves the sealing performance, thereby preventing adhesive overflow caused by long-term excessive adhesive feeding pressure, and further ensuring the adhesive dispensing accuracy.

Description

Large flow double liquid screw valve TECHNICAL FIELD

[0001] The utility model relates to the dispensing technology field especially relates to a large flow double liquid screw valve. BACKGROUND

[0002] The double liquid screw valve is a kind of precision screw valve suitable for two kinds of high viscosity glue dispensing, and is one of main components of dispensing equipment.It mainly includes two driving assemblies and screw valve body assembly, and the screw valve body assembly includes threaded rotor and stator, the threaded rotor and stator can be combined to form sealed cavity, under the action of driving assembly, threaded rotor rotates to make the glue in the cavity be pushed to transmission, the glue in two cavities is pushed to the bottom of the confluence valve block after confluence, and then is continuously pushed to the mixing pipe output point glue.But, in the existing double liquid screw valve, especially in the process of being used for high viscosity glue to carry out large flow dispensing, due to the pressure of glue itself is too large, the situation of glue overflow caused by sealing failure is prone to occur, and then the precision of glue discharge is influenced. SUMMARY

[0003] The utility model solves the technical problem to provide a kind of large flow double liquid screw valve, the large flow double liquid screw valve can realize the real-time lubrication of connecting rod and improve sealing performance, avoid the situation of glue overflow caused by long-time glue pressure being too large, further guarantee the precision of glue discharge.

[0004] To solve the above technical problems, the technical scheme adopted by the utility model is as follows: a large flow double liquid screw valve, comprising: two vertically arranged stators and two corresponding rotors arranged in 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, an inlet pipe with an inlet opening is arranged on the outer side of the upper end of each stator, the upper end of the vertically extending inlet pipe is connected to a sealing block with a mounting hole, the lower end of the connecting rod connected to the driving assembly passes through the mounting hole and the inlet pipe on the sealing block in sequence and is connected to the rotor, a plurality of sealing rings are arranged on the outer side of the connecting rod in the mounting 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 solution is as follows:

[0006] 1. In the above scheme, the sealing ring is provided with three, and the lubrication cavity is provided with two.

[0007] 2. The mounting hole two ends of the inner wall of each have a radially inward flange part, a plurality of sealing ring is arranged between the two flange parts.

[0008] 3. The sealing ring is a rubber sealing ring or a seal ring.

[0009] 4. The sealing block and the drive assembly are provided with a mounting bracket, the drive assembly is mounted on the mounting bracket, and the connecting rod and the mounting bracket are rotatably connected through at least two vertically arranged bearings.

[0010] 5. The lower end of the two stators is connected with a glue guide block, the lower end of the glue guide block is connected with a glue mixing pipe, and the lower end of the two glue liquid channels is communicated with the glue mixing pipe through a glue guide channel formed in the glue guide block.

[0011] 6. The glue inlet and the upper end of the corresponding glue liquid channel are communicated through the glue inlet channel formed between the inner wall of the glue inlet pipe and the connecting rod.

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

[0013] The large flow double liquid screw valve of the utility model, the upper end of the vertically extending glue inlet pipe is connected with a sealing block with a mounting hole, the lower end of the connecting rod connected with the drive assembly passes through the mounting hole and the glue inlet pipe of the sealing block in turn and is connected with the rotor, a plurality of sealing rings sleeved on the outer side of the connecting rod are arranged in the mounting hole, a spacer ring is arranged between any two adjacent sealing rings arranged in the vertical direction in turn, a lubricating cavity for filling grease is formed between the inner wall of each spacer ring and the outer circumferential surface of the connecting rod, the real-time lubrication of the connecting rod and the improvement of the sealing performance can be realized on the basis of ensuring the precision of the rotation of the stator with the connecting rod, the overflow of glue due to long time and excessive glue pressure is avoided, and the precision of glue discharge is further ensured. BRIEF DESCRIPTION OF DRAWINGS

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

[0015] Figure 2 is a schematic diagram of the cross section of the large flow double liquid screw valve of the utility model;

[0016] Figure 3 is an enlarged view of the layout structure in figure 2 of the utility model.

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

[0018] The present patent can be further understood by the specific examples given below, but they are not a limitation of the present patent.

[0019] Example 1: A large-flow double-liquid screw valve, comprising: 2 vertically arranged stators 1 and 2 corresponding rotors 2 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 with a drive assembly 5 through a connecting rod 4, the outer side of the upper end of each stator 1 is provided with a glue inlet pipe 6 with a glue inlet 61, the upper end of the vertically extending glue inlet pipe 6 is connected with a sealing block 7 with a mounting through hole 71, the lower end of the connecting rod 4 connected with the drive assembly 5 passes through the mounting through hole 71 on the sealing block 7 and the glue inlet pipe 6 in turn and is connected with the rotor 2, a plurality of sealing rings 8 are arranged on the outer side of the connecting rod 4 in the mounting through hole 71, a spacer ring 9 is arranged between any two adjacent sealing rings 8 arranged in the vertical direction in turn, and a lubricating cavity 10 for filling grease is formed between the inner wall of each spacer ring 9 and the outer circumference of the connecting rod 4.

[0020] The above-mentioned sealing ring 8 is provided with 3, the above-mentioned lubricating cavity 10 is provided with 2; the inner wall of both ends of the above-mentioned mounting through hole 71 has a flange portion 11 radially inward, a plurality of the above-mentioned sealing rings 8 are arranged between the two above-mentioned flange portions 11; the above-mentioned sealing ring 8 is a rubber sealing ring.

[0021] The embodiment 2 is a large-flow double-liquid screw valve, which comprises two vertical stators 1 and two corresponding rotors 2 arranged in the stators 1, a glue liquid 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 with a driving assembly 5 through a connecting rod 4, the outer side of the upper end of each stator 1 is provided with a glue inlet pipe 6 with a glue inlet 61, the upper end of the vertically extending glue inlet pipe 6 is connected with a sealing block 7 with a mounting hole 71, the lower end of the connecting rod 4 connected with the driving assembly 5 passes through the mounting hole 71 on the sealing block 7 and the glue inlet pipe 6 in sequence and is connected with the rotor 2, a plurality of sealing rings 8 are arranged in the mounting hole 71 and 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 the vertical direction in sequence, and a lubricating 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 universal sealing ring.

[0023] A mounting bracket 12 is arranged 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 is rotationally connected with the mounting bracket 12 through at least two vertical bearings 13.

[0024] A glue guide block 14 is connected between the lower ends of the two stators 1, the lower end of the glue guide block 14 is connected with a glue mixing pipe 15, and the lower ends of the two glue liquid flow channels 3 are respectively communicated with the glue mixing pipe 15 through a glue guide flow channel 141 formed in the glue guide block 14.

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

[0026] When the large-flow double-liquid screw valve is used, the real-time lubrication of the connecting rod and the sealing performance can be improved on the basis of ensuring the rotation accuracy of the stator with the connecting rod, the glue overflow caused by the excessive glue pressure for a long time is avoided, and the glue output accuracy is further ensured.

[0027] The above embodiment is only for illustrating the technical concept and characteristics of the utility model, the purpose is to enable the person skilled in the art to understand the content of the utility model and to implement it, and cannot limit the protection scope of the utility model. Any equivalent change or modification according to the spirit and essence of the utility model shall be covered within the protection scope of the utility model.

Claims

1. A high flow dual fluid screw valve comprising: 2 vertical stators (1) and 2 corresponding rotors (2) 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 with a driving assembly (5) through a connecting rod (4), characterized in that: the outer side of the upper end of each stator (1) is provided with a glue inlet pipe (6) with a glue inlet (61), the upper end of the vertically extending glue inlet pipe (6) is connected with a sealing block (7) with a mounting hole (71), the lower end of the connecting rod (4) connected with the driving assembly (5) passes through the mounting hole (71) on the sealing block (7) and the glue inlet pipe (6) in sequence and is connected with the rotor (2), a plurality of sealing rings (8) are arranged in the mounting hole (71) and 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 the vertical direction, and a lubricating 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 high flow dual fluid screw valve of claim 1, wherein: The sealing ring (8) is provided with 3, and the lubricating cavity (10) is provided with 2.

3. The high flow dual fluid screw valve of claim 1, wherein: The inner wall of both ends of the mounting hole (71) has a flange portion (11) radially inward, and a plurality of sealing rings (8) are arranged between the two flange portions (11).

4. The high flow dual fluid screw valve of claim 1, wherein: The sealing ring (8) is a rubber sealing ring or a generic sealing ring.

5. The high flow dual fluid screw valve of claim 1, wherein: A mounting bracket (12) is arranged 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 connected through at least two vertically arranged bearings (13).

6. The high flow dual fluid screw valve of claim 1, wherein: A glue guide block (14) is connected between the lower ends of the two stators (1), the lower end of the glue guide block (14) is connected with a glue mixing pipe (15), and the lower ends of the two glue flow channels (3) are communicated with the glue mixing pipe (15) through a glue guide flow channel (141) formed in the glue guide block (14).

7. The high flow dual fluid screw valve of claim 1, wherein: The glue inlet (61) and the upper end of the corresponding glue flow channel (3) are communicated through a glue inlet flow channel (62) formed between the inner wall of the glue inlet pipe (6) and the connecting rod (4).

Images