CN212091742U - A gear proportional valve - Google Patents

Abstract

The utility model provides a gear proportional valve, which relates to the field of colloid proportioning and mixing. The gear proportional valve includes a gear box cover, a gear box, a first matching gear, a second matching gear and a rotating power source. The first matching gear and the second matching gear are meshed and connected, and both are loaded in the accommodating space in which the gear box and the cover of the gear box are tightly connected. The rotating power source drives the first matching gear to rotate. Both end faces of the first matching gear and both end faces of the second matching gear are in close contact with the inner bottom surface of the gear box and the gear box cover. A first glue inlet, a second glue inlet and a glue outlet are provided on the side wall of the gear box. The two components of glue are respectively fed into the gear box through the first glue inlet and the second glue inlet, and then discharged from the glue outlet after mixing. The utility model adopts a pair of intermeshing proportioning gears, and only one power source can drive the double proportioning gears to rotate to carry out the proportioning of two-component colloids, the overall structure is simple, and the daily maintenance is convenient.

Description

A gear proportional valve

technical field

The utility model relates to the field of colloid proportioning and mixing, in particular to a gear proportional valve.

Background technique

Although the patent CN 103657964A uses a gear pump to carry out the proportioning glue supply of the two-component liquid, the design requires two servo motors to drive the two gear pumps respectively, and the difference can only be achieved by changing the speed ratio of the two servo motors. The proportion of the proportion of glue supply. In actual use, due to the need for two gear pumps and servo motors, this design occupies a large working space, has a high cost of use, and is more troublesome to clean, which is likely to cause low economic benefits and other phenomena, and is only suitable for certain specific fields. .

The existing two-component liquid proportioning glue supply system mainly has the following shortcomings: 1. The existing system uses two gear pumps to realize the transmission of two-component liquid, and two servo motors are required in the working process. To a certain extent, it increases the cost and occupies a large working space; 2. This kind of proportioning glue supply system uses the adjustment of the speed of the servo motor to realize the glue supply of two-component liquids in different proportions. During the proportioning, it will inevitably be Because of the speed error between the two motors, it is impossible to achieve high-precision proportioning; 3. In order to better ensure the proportioning ratio of the existing two-component proportioning glue supply system, it is necessary to make the two gear pumps even It also keeps running at low speed when not working, which greatly accelerates the wear of gears and related components, and has a short service life; 4. This system has many core components, which increases the daily cleaning and maintenance during use. The difficulty of maintenance greatly reduces the work efficiency.

Utility model content

The purpose of the utility model is to solve the deficiencies of the existing two-component liquid proportioning glue supply system that requires two power sources, high cost, low precision and difficulty in routine maintenance. The utility model proposes to use a power source, a set of gears with the same degree circle diameter, base circle diameter, tooth tip circle diameter, tooth root circle diameter, tooth number and module number but different tooth thicknesses to realize the pressure of the two-component liquid. The proportioning ratio is mainly determined by the volume ratio of the single sealed cavity formed by the adjacent two teeth of each gear and the inner wall of the gear box (assuming the volume of the cavity formed by the adjacent two teeth of the proportioning gear 1 and the inner wall of the gear box) is a, and the volume of the cavity formed by the proportioning gear 2 and the inner wall of the gear box is b, then the proportioning ratio is a:b). The specific plan is as follows.

The utility model provides a gear proportional valve, comprising: a gear box cover, a gear box, a first proportioning gear, a second proportioning gear and a rotating power source;

The first matching gear and the second matching gear are meshed and connected, and both are loaded in the accommodating space where the gear box and the gear box cover are closely connected; the two end faces of the first matching gear and the two end surfaces of the second ratio gear are in close contact with the inner bottom surface of the gear box and the gear box cover; the inner side wall of the gear box is fitted with part of the tooth circumference of the first ratio gear and part of the tooth circumference of the second proportioning gear;

After loading the first proportioning gear and the second proportioning gear in the accommodating space, the remaining accommodating space is divided into The space before meshing and the space after meshing;

The rotating power source passes through the bottom of the gear box and is fixedly connected to the axis of the first matching gear to drive the first matching gear to rotate;

A first glue inlet, a second glue inlet and a glue outlet are set on the side wall of the gear box; the first glue inlet is connected to the tooth circumference of the first proportioning gear and fits with the gear box The second glue inlet is communicated with the gear box where the tooth circumference of the second proportioning gear meets the gear box; the glue outlet communicates with the space before meshing.

Preferably, a residual glue collection port is further provided on the gear box, and the residual glue collection port is communicated with the space after meshing.

Preferably, the root circle diameter, the base circle diameter, the index circle diameter, the tip circle diameter, the module and the number of teeth of the first proportioning gear and the second proportioning gear are equal, and the tooth thicknesses are not equal.

Preferably, a first sealing ring is arranged between the upper end face of the first proportioning gear and the gear box cover; a second sealing ring is arranged between the upper end surface of the second proportioning gear and the gear box cover a sealing ring; a third sealing ring is arranged between the lower end face of the first matching gear and the gear box; a fourth sealing ring is arranged between the lower end face of the second matching gear and the gear box .

Preferably, the rotating power source includes a servo motor, a coupling and a first transmission shaft; the coupling connects the output shaft of the servo motor and the first transmission shaft; the first transmission shaft is upward The upper end of the first transmission shaft is rotatably inserted into the cover of the gear box by passing through the bottom of the gear box in sequence, passing through and fixedly connected to the shaft center of the first proportioning gear.

Preferably, the gear proportional valve is further provided with a motor fixing plate, a transmission gear fixing plate and a fixing rod; the fixing rod passes through and is fixedly connected to the transmission gear fixing plate, and its lower end is fixed on the motor fixing plate, and the other The upper end is fixed on the outer bottom surface of the gear box; the servo motor is fixed on the lower surface of the motor fixing plate, and its output shaft passes through the motor fixing plate without contact; the first transmission shaft is rotatable upward. Before passing through the bottom of the gear box, it can also rotatably pass through the transmission gear fixing plate.

Preferably, the gear proportional valve is further provided with a first transmission gear and a second transmission gear with the same shape and size; the first transmission gear and the second transmission gear are meshed and connected, and both are arranged on the gear between the box and the transmission gear fixing plate; the first transmission shaft also passes through and fixes the shaft center of the first transmission gear; the gear proportional valve is also provided with a second transmission shaft, the lower end of which is rotatable is inserted into the transmission gear fixing plate, the other end passes upward in turn and is fixedly connected to the shaft center of the second transmission gear, rotatably passes through the bottom of the gear box, and passes through and is fixedly connected to the second transmission gear. At the shaft center of the matching gear, its upper end is rotatably inserted into the gear box cover.

Preferably, the first transmission shaft is rotatably connected with the transmission gear fixing plate, the gear box and the gear box cover through bearings; the second transmission shaft is respectively connected with the transmission gear The gear fixing plate, the gear box and the gear box cover are all rotatably connected by bearings.

The beneficial effect of the utility model is that a pair of mutually meshing proportioning gears are adopted, and only a single power source can drive the double proportioning gears to rotate to carry out proportioning, mixing and conveying of two-component liquids, and the proportioning precision is high , improve work efficiency; its overall structure is simple, daily maintenance, disassembly, installation and cleaning are more convenient, can reduce the investment of the front glue supply system to a certain extent, save equipment costs, improve economic benefits; this gear proportional valve It can also meet the requirements of different proportions by replacing the proportioning gears with different tooth thicknesses. It does not have high requirements on the viscosity, working pressure and temperature of the two-component liquid. It is suitable for many occasions, especially in two-component liquids. Areas with higher liquid viscosity have clear advantages.

Description of drawings

In order to illustrate the technical solutions of the present invention more clearly, the following briefly introduces the accompanying drawings used in the implementation manner. Obviously, the accompanying drawings in the following description are only some implementations of the present utility model. For those of ordinary skill in the art, other drawings can also be obtained from these drawings without any creative effort.

1 is a schematic diagram of an external overall structure of a gear proportional valve provided by an embodiment of the present invention;

Fig. 2 is the structural schematic diagram of the meshing connection of the double ratio gears provided by the embodiment of the present invention;

3 is an internal cross-sectional view of a gear proportional valve provided by an embodiment of the present invention;

4 is a schematic structural diagram of a sealing ring provided by an embodiment of the present invention;

5 is an external oblique view of the gear proportional valve provided by the embodiment of the present invention;

FIG. 6 is a schematic structural diagram of a glue inlet, a glue outlet and a residual glue collection port provided on the gear box provided by the embodiment of the present invention.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

Example

As shown in Figures 1 and 2, the utility model provides a gear proportional valve, which is used for proportioning two components of glue, and mixing and outputting the glue. The gear proportional valve includes: a gear box cover 1 , a gear box 7 , a first matching gear 23 , a second matching gear 24 and a rotational power source. The rotating power source drives the first matching gear 23 to rotate.

The first matching gear 23 and the second matching gear 24 are meshed and connected, and both are loaded in the accommodating space where the gear box 7 and the gear box cover 1 are closely connected. The gear box 7 is seamlessly connected with the gear box cover 1 and fixed by bolts. Both end surfaces of the first proportioning gear 23 are in close contact with the inner bottom surface of the gear box 7 and the gear box cover 1 . Both end surfaces of the second proportioning gear 24 are also tightly engaged with the inner bottom surface of the gear box 7 and the gear box cover 1 .

As shown in Figure 3, specifically: a first sealing ring 19 is provided between the upper end face of the first proportioning gear and the gear box cover; a second sealing ring 19 is arranged between the upper end surface of the second proportioning gear and the gear box cover ring 20; a third sealing ring 21 is provided between the lower end surface of the first matching gear and the gear box; a fourth sealing ring 22 is arranged between the lower end surface of the second matching gear and the gear box.

As shown in FIG. 4 , which is a schematic diagram of the shape of the sealing ring in one embodiment, the four sealing rings have the same shape and are all annular. The first proportioning gear 23 and the second proportioning gear 24 are in close contact with the gear box 7 and the gear box cover 1 respectively through the sealing ring, so that the glue in the gear box will not penetrate into the shaft center of the gear, so that it will not penetrate further. Outside the gear box 7 .

Please continue to refer to FIG. 2 , the inner side wall of the gear box 7 is adapted to a part of the tooth circumference of the first proportioning gear 23 and a part of the tooth circumference of the second proportioning gear 24 . After the first proportioning gear 23 and the second proportioning gear 24 are loaded in the accommodating space, the remaining accommodating space is divided into the pre-meshing space 12 by the engagement of the first proportioning gear 23 and the second proportioning gear 24. And engage the rear space 30.

As shown in FIG. 5 and FIG. 6 , a first glue inlet 5 , a second glue inlet 6 and a glue outlet 2 are provided on the side wall of the gear box 7 . Please also refer to FIG. 2 , the first glue inlet 5 is connected to the position where the tooth circumference of the first proportioning gear 23 and the gear box 7 meet. The second glue inlet 6 is communicated with the position where the tooth circumference of the second proportioning gear 24 and the gear box 7 meet. The glue outlet 2 is communicated with the space 12 before meshing.

Further, in a preferred embodiment, the gear box 7 is further provided with a residual glue collecting port 16 , and the residual glue collecting port 16 is communicated with the space 30 after meshing. When the two ratio gears are meshed, a small closed space is formed between the teeth of one gear and the tooth grooves of the other gear, resulting in a small part of the mixed glue being transported to the space 30 after meshing. Therefore, a residual glue collecting port 16 can be set here to collect the residual glue amount, and after a certain amount is collected, it can be directly used in production operations, thereby reducing the waste of glue.

In one of the preferred embodiments, the diameter of the root circle, the diameter of the base circle, the diameter of the index circle, the diameter of the addendum circle, the module, the pitch and the number of teeth of the first proportioning gear 23 and the second proportioning gear 24 are equal. , but the tooth thicknesses are not equal. And the two ratio gears are of equal height. The ratio of the two components of the glue is determined according to the tooth thickness. In other embodiments, the ratio of the two components of the glue can also be adjusted by replacing the ratio gears with different tooth thicknesses.

The rotational power source includes the servo motor 15 , the coupling 11 and the first transmission shaft 8 . The servo motor 15 has an output shaft 13 , and the coupling 11 connects the output shaft 13 of the servo motor 15 and the first transmission shaft 8 .

The first transmission shaft 8 rotatably passes through the bottom of the gear box 7 upwards in turn, and passes through and is fixedly connected to the shaft center of the first matching gear 23 to drive the first matching gear 23 to rotate, and the upper end of which is rotatably inserted into the gear in lid 1.

When the gear proportional valve is running, the glue A component enters from the first glue inlet 5, and the glue B component enters from the second glue inlet 6. The servo motor 15 drives the first transmission shaft 8 to rotate, and drives the first matching gear 23 to rotate, and the first matching gear 23 drives the second matching gear 24 to reversely rotate through the meshing action. The rotational speed of the servo motor 15 can be set to be about 1 r/s by reference, which is not specifically limited in the present invention. The glue A component fills one tooth slot of the first proportioning gear 23 , and the glue B component fills one tooth slot of the second proportioning gear 24 . Assuming that the volume of the cavity formed by the adjacent two teeth of the first proportioning gear 23 and the inner wall of the gear box is a, and the volume of the cavity formed by the adjacent two teeth of the second proportioning gear 24 and the inner wall of the gear box is b, then the glue has two components The proportion of the mixture is a:b. The glue A component and the glue B component are mixed in the space 12 before meshing, and discharged through the glue outlet 2 . The ratio of the two components of the glue can be adjusted by replacing the ratio gears with different tooth thicknesses according to the actual use requirements.

Please continue to refer to FIG. 1 and FIG. 5, further, in a preferred embodiment, the gear proportional valve is also provided with a first transmission gear 3 and a second transmission gear 4 with the same shape and size, as well as a motor fixing plate 14, a transmission gear Gear fixing plate 9 and four fixing rods 10. The four fixing rods 10 respectively pass through and are fixedly connected to the four corners of the transmission gear fixing plate 9 . corner. The first transmission gear 3 and the second transmission gear 4 are meshed and connected, and both are arranged between the gear box 7 and the transmission gear fixing plate 9 .

The servo motor 15 is fixed on the lower surface of the motor fixing plate 14 , and its output shaft 13 passes through the motor fixing plate 14 without contact. The coupling 11 is arranged between the motor fixing plate 14 and the transmission gear fixing plate 9 . Before the first transmission shaft 8 rotatably passes through the bottom of the gear box 7 , it also rotatably passes through the transmission gear fixing plate 9 in turn, and passes through and is fixedly connected to the shaft center of the first transmission gear 3 . Among them, the first transmission gear 3 and the first proportioning gear 23 are respectively fixed to the first transmission shaft 8 and are driven by the servo motor 15 to rotate at the same speed and in the same direction. The first transmission shaft 8 also passes through the centers of the first sealing ring 19 and the third sealing ring 21 respectively, so that the glue will not seep onto the first transmission shaft 8 and overflow the box.

Please continue to refer to FIG. 3, the gear proportional valve is also provided with a second transmission shaft 29, the lower end of which is rotatably inserted into the transmission gear fixing plate 9, and the other end passes upward in turn and is fixedly connected to the axis of the second transmission gear 4. It rotates through the bottom of the gear box 7 and passes through and is fixedly connected to the shaft center of the second proportioning gear 24 , and its upper end is rotatably inserted into the gear box cover 1 . With this design, the second transmission gear 4 and the second proportioning gear 24 can be mutually braked by being fixed on the second transmission shaft 29 . The second transmission shaft 29 also passes through the center of the second sealing ring 20 and the fourth sealing ring 22 respectively, so that the glue will not seep onto the second transmission shaft 29 and overflow the box.

Please continue to refer to FIG. 3, in a preferred embodiment, both the first transmission shaft 8 and the second transmission shaft 29 are respectively located between the transmission gear fixing plate 9, the gear box 7 and the gear box cover 1, a total of six All connections are rotatably connected by bearings. Specifically: the first transmission shaft 8 and the gear box cover 1 are rotatably connected through the first bearing 17; the second transmission shaft 29 and the gear box cover 1 are rotatably connected through the second bearing 18; the first transmission A rotatable connection between the shaft 8 and the gear box 7 through a third bearing 25; a rotatable connection between the second transmission shaft 29 and the gear box 7 through a fourth bearing 26; the first transmission shaft 8 and the transmission gear fixing plate 9 The fifth bearing 27 is rotatably connected therebetween; the second transmission shaft 29 and the transmission gear fixing plate 9 are rotatably connected through the sixth bearing 28 . Through the bearing connection, the drive shaft and gear run relatively smoothly, the wear of the components is small, and the service life is long.

The first transmission gear 3 and the second transmission gear 4 which are identical and meshed with each other are arranged, and their meshing rotation is relatively accurate and stable, which can stabilize the meshing and rotating mechanism of the first matching gear 23 and the second matching gear 24, so as to ensure the matching accuracy. higher.

To sum up, the utility model adopts a pair of intermeshing proportioning gears, and only one servo motor can drive the double proportioning gears to rotate for proportioning, mixing and conveying of two-component liquids, and the proportioning precision is high. , improve work efficiency; its overall structure is simple, daily maintenance, disassembly, installation and cleaning are more convenient, can reduce the investment of the front glue supply system to a certain extent, save equipment costs, improve economic benefits; this gear proportional valve It can also replace the proportioning gears with different tooth thicknesses to meet the requirements of different proportions of glue. It does not have high requirements on the viscosity, working pressure and temperature of the two-component liquid. It is suitable for many occasions, especially in the two-component liquid. Areas with higher viscosity have clear advantages.

The above disclosures are only the preferred embodiments of the present invention, which cannot limit the scope of the rights of the present invention. Those of ordinary skill in the art can understand that all or part of the procedures for realizing the above-mentioned embodiments can be implemented according to the present invention. The equivalent changes made by the claims still belong to the scope of the rights covered by the present invention.

Claims (8)

1. A geared proportional valve, comprising: the gear box comprises a gear box cover (1), a gear box (7), a first proportioning gear (23), a second proportioning gear (24) and a rotary power source;

the first proportioning gear (23) and the second proportioning gear (24) are meshed and connected and are loaded in an accommodating space where the gear box (7) and the gear box cover (1) are tightly connected; two end faces of the first proportioning gear (23) and two end faces of the second proportioning gear (24) are tightly jointed with the inner bottom face of the gear box (7) and the gear box cover (1); the inner side wall of the gear box (7) is engaged with a part of the tooth circumference of the first proportioning gear (23) and a part of the tooth circumference of the second proportioning gear (24);

after the accommodating space is loaded with the first proportioning gear (23) and the second proportioning gear (24), the meshing part of the first proportioning gear (23) and the second proportioning gear (24) divides the rest accommodating space into a space before meshing (12) and a space after meshing (30);

the rotary power source penetrates through the bottom of the gear box (7) and is fixedly connected to the axis of the first proportioning gear (23) so as to drive the first proportioning gear (23) to rotate;

a first glue inlet (5), a second glue inlet (6) and a glue outlet (2) are formed in the side wall of the gear box (7); the first glue inlet (5) is communicated with the joint of the gear periphery of the first proportioning gear (23) and the gear box (7); the second glue inlet (6) is communicated with the joint of the gear periphery of the second proportioning gear (24) and the gear box (7); the glue outlet (2) is communicated with the space (12) before engagement.

2. The gear proportional valve according to claim 1, wherein a residual glue collecting port (16) is further formed in a side wall of the gear box (7), and the residual glue collecting port (16) is communicated with the meshing rear space (30).

3. The geared proportional valve of claim 1, wherein the first ratio gear and the second ratio gear have equal root diameter, base diameter, pitch diameter, tip diameter, module and number of teeth, and unequal tooth thicknesses.

4. The gear ratio valve according to claim 1, characterized in that a first sealing ring (19) is arranged between the upper end face of the first proportioning gear and the gearbox cover; a second sealing ring (20) is arranged between the upper end face of the second proportioning gear and the gear box cover; a third sealing ring (21) is arranged between the lower end face of the first proportioning gear and the gear box; and a fourth sealing ring (22) is arranged between the lower end face of the second proportioning gear and the gear box.

5. Gear ratio valve according to claim 1, characterized in that the source of rotational power comprises a servomotor (15), a coupling (11) and a first transmission shaft (8); the coupler (11) is connected with an output shaft (13) of the servo motor (15) at the lower end and the first transmission shaft (8) at the upper end;

first transmission shaft (8) upwards in proper order rotatable pass gear box (7) bottom passes and fixed connection the axle center department of first ratio gear (23), the rotatable insertion in upper end of first transmission shaft (8) in gear box lid (1).

6. The gear ratio valve according to claim 5, characterized in that it is further provided with a motor fixing plate (14), a transmission gear fixing plate (9) and a fixing rod (10); the fixed rod (10) penetrates through and is fixedly connected with the transmission gear fixing plate (9), the lower end of the fixed rod is fixed on the motor fixing plate (14), and the upper end of the fixed rod is fixed on the outer bottom surface of the gear box (7);

the servo motor (15) is fixed on the lower surface of the motor fixing plate (14), and an output shaft (13) of the servo motor penetrates through the motor fixing plate (14) in a non-contact manner; the first transmission shaft (8) can also rotatably penetrate through the transmission gear fixing plate (9) before the first transmission shaft can rotatably penetrate through the bottom of the gear box (7) upwards.

7. The gear ratio valve according to claim 6, characterized in that it is further provided with a first transmission gear (3) and a second transmission gear (4) of the same shape and size; the first transmission gear (3) is meshed with the second transmission gear (4) and is arranged between the gear box (7) and the transmission gear fixing plate (9);

the first transmission shaft (8) also penetrates through and fixes the axis of the first transmission gear (3);

the gear proportional valve is further provided with a second transmission shaft (29), the lower end of the second transmission shaft is rotatably inserted into the transmission gear fixing plate (9), the other end of the second transmission shaft upwards sequentially penetrates through and is fixedly connected with the axis of the second transmission gear (4), the bottom of the gear box (7) and the axis of the second proportioning gear (24), and the upper end of the second transmission shaft is rotatably inserted into the gear box cover (1).

8. The gear ratio valve of claim 7 wherein: the first transmission shaft (8) and the second transmission shaft (29) are respectively rotatably connected with the transmission gear fixing plate (9), the gear box (7) and the gear box cover (1) through bearings.

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