A nozzle structure and a nozzle assembly

Abstract

The application discloses a nozzle structure and a nozzle assembly, wherein the nozzle structure comprises a nozzle seat, two oppositely movable lip members, a guide structure and an adjusting structure; a fluid channel is formed in the nozzle seat, the fluid channel vertically penetrates the top and bottom of the nozzle seat, forms a fluid inlet at the top of the nozzle seat and a fluid outlet at the bottom of the nozzle seat; the two lip members are arranged at the fluid outlet, and a nozzle opening communicating with the fluid outlet is formed between the two lip members; the guide structure is arranged on the nozzle seat and is used for movably connecting the two lip members with the nozzle seat and guiding the two lip members to move linearly in the left-right direction; and the adjusting structure is arranged on the nozzle seat and is used for driving the two lip members to move close to or away from each other so as to adjust the size of the slit of the nozzle opening. The slit width of the nozzle structure and the nozzle assembly of the application can be adjusted.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of nozzles, in particular a nozzle structure and a nozzle assembly. BACKGROUND

[0002] A slit nozzle is a device with a slit-shaped nozzle, which sprays or sprays a coating liquid, gas, cleaning liquid, medicine or cooling medium, etc. to the surface of a substrate, steel plate, crop, etc. with a certain width, and is widely used in coating, quenching, cleaning, cooling, agricultural spraying, etc.

[0003] The structure of the existing slit nozzle is as follows:

[0004] The patent with application number 202321942936.7 discloses a nozzle structure, comprising: a support, a cavity is formed in the support; a glue nozzle is installed in the cavity, the glue nozzle is provided with a glue nozzle, the cross-sectional size of the glue nozzle channel decreases from the glue inlet end to the glue outlet end; a nozzle is also installed in the cavity and abuts against the front side of the glue nozzle, the nozzle is composed of an upper lip nozzle and a lower lip nozzle, a glue nozzle is provided between the upper lip nozzle and the lower lip nozzle, which is connected with the glue nozzle and used for coating glue.

[0005] The patent with application number 201010194098.0 discloses a slit nozzle suitable for coating fluid on the surface of the treated object, the slit nozzle comprises: a spacer plate, both sides of the spacer plate are provided with a recess, the spacer plate comprises: two flow guide holes, which are respectively arranged at both ends of the spacer plate; a first nozzle base is arranged on one side of the spacer plate; and a second nozzle base is arranged on the other side of the spacer plate opposite to the first nozzle base, wherein the recess and the joint surface of the first nozzle base and the second nozzle base and the spacer plate respectively form a slit.

[0006] The patent with application number 200410032967.4 discloses a slit nozzle and a processing liquid supply device using the slit nozzle, wherein the slit nozzle is a slit nozzle for supplying processing liquid to the surface of the treated object with a set width, the slit nozzle is composed of left and right halves, the material of one half is metal material, and the material of the other half is resin material.

[0007] Patent No. 201510317541.1 discloses a coating nozzle, a coating device having the coating nozzle, and a coating method thereof. The coating nozzle is formed by combining a left body and a right body. A recess determining the width dimension of a slit-shaped nozzle outlet is formed on the abutting surface of at least one of the left body and the right body. The coating nozzle further includes at least one separator detachably mounted between the abutting surface of the left body and the abutting surface of the right body. The at least one separator is located in the recess to separate the coating nozzle into a plurality of sub-coating nozzles, and the coating area of the plurality of sub-coating nozzles is adjusted by adjusting the position of the at least one separator.

[0008] However, the two halves or two lips of the existing slit nozzle are fixed and immovable, so the slit width of the nozzle outlet is fixed and unchangeable. This results in many application limitations and technical problems:

[0009] In the coating field, when different substrate materials (such as rigid metal plates and flexible films), different coating fluid viscosities (such as low-viscosity solvent-based coatings and high-viscosity paste adhesives), or different coating thickness requirements are needed, the fixed slit cannot be flexibly adjusted to correspond to the flow rate and coating width, which easily causes problems such as sagging due to over-thick coating, missing coating due to over-thin coating, or mismatching between the coating width and the substrate size. Different specifications of nozzles need to be frequently replaced to meet the requirements, which not only increases the equipment investment cost, but also reduces the production efficiency due to downtime for replacement;

[0010] In the cleaning field, for different levels of contamination of workpieces (such as light dust and heavy oil stains), the fluid pressure and flow rate sprayed by the fixed slit are constant. If the slit is too small, the high-pressure fluid may damage the surface of the precision workpiece. If the slit is too large, the low-pressure large flow rate will cause waste of cleaning liquid, and it is difficult to form effective impact on stubborn stains, resulting in incomplete cleaning;

[0011] In the heat processing field such as quenching and cooling, different workpiece materials (such as carbon steel and alloy steel) and different heat treatment processes (such as surface quenching and overall quenching) have significant differences in cooling rate requirements. The coverage range and impact intensity of the cooling medium sprayed by the fixed slit are fixed, which easily causes local cooling too fast to produce cracks, or local cooling insufficient to affect the hardness uniformity, and in severe cases, it will reduce the mechanical properties of the workpiece and even cause scrap;

[0012] In the agricultural spraying field, different crop growth periods (such as seedling stage and mature stage) or pest control needs (such as leaf spraying and root drenching) require different droplet sizes and spraying ranges. The fixed slit is difficult to accurately control the droplet parameters, which either results in poor atomization effect and low pesticide utilization rate, or causes deviation of the spraying range, resulting in waste of pesticides and environmental pollution.

[0013] In addition, even for a single application scenario, when the nozzle is deformed due to wear after long-term use, the fixed structure cannot compensate for the wear amount by adjustment, and the entire nozzle must be replaced, further increasing the use cost.

[0014] Therefore, it is particularly necessary to provide a nozzle with adjustable slits to solve the above problems. SUMMARY

[0015] The present application aims to provide a nozzle structure and a nozzle assembly, which can adjust the slit width, and the nozzle assembly can coat or clean the surface of the processed object with different shapes and sizes.

[0016] The technical solutions adopted by the present application are as follows:

[0017] A nozzle structure comprises a nozzle seat, two oppositely movable lip members, a guide structure and an adjusting structure.

[0018] The nozzle seat is provided with a fluid channel, which vertically penetrates the top and bottom of the nozzle seat, forms a fluid inlet at the top of the nozzle seat, and forms a fluid outlet at the bottom of the nozzle seat.

[0019] The two lip members are arranged at the fluid outlet, and the two lip members form a nozzle opening communicating with the fluid outlet.

[0020] The guide structure is arranged on the nozzle seat, and is used to movably connect the two lip members with the nozzle seat and guide the two lip members to move linearly in the left-right direction.

[0021] The adjusting structure is arranged on the nozzle seat, and is used to drive the two lip members to move closer to or away from each other to adjust the slit size of the nozzle opening.

[0022] Further, the guide structure comprises a left sliding groove arranged in the left inner wall of the nozzle seat and a right sliding groove arranged in the right inner wall of the nozzle seat, the opening direction of the left sliding groove is right, and the opening direction of the right sliding groove is left; the left sliding groove and the right sliding groove are arranged close to the fluid outlet; the two lip members are a left lip member and a right lip member, the left end of the left lip member is inserted into the left sliding groove and can slide left and right along the left sliding groove, and the right end of the right lip member is inserted into the right sliding groove and can slide left and right along the right sliding groove.

[0023] Further, the adjusting structure comprises a left adjusting bolt, a right adjusting bolt, a left reset spring and a right reset spring.

[0024] The left adjusting screw is located at the left side of the nozzle seat, and is threadedly connected with the left side wall of the nozzle seat, the right end of the left adjusting screw penetrates through the left end inner wall of the left sliding slot and extends into the left sliding slot to abut against the left end of the left lip component; when the left adjusting screw is screwed to the right, the left lip component is pushed to extend out of the left sliding slot;

[0025] The right adjusting screw is located at the right side of the nozzle seat, and is threadedly connected with the right side wall of the nozzle seat, the left end of the right adjusting screw penetrates through the right end inner wall of the right sliding slot and extends into the right sliding slot to abut against the right end of the right lip component; when the right adjusting screw is screwed to the left, the right lip component is pushed to extend out of the right sliding slot;

[0026] The left reset spring is arranged in the left sliding slot and sleeved on the left adjusting screw, the left end of the left reset spring is connected with the left end inner wall of the left sliding slot, and the right end is connected with the left lip component, the left reset spring is used for providing a restoring force to move the left lip component into the left sliding slot;

[0027] The right reset spring is arranged in the right sliding slot and sleeved on the right adjusting screw, the right end of the right reset spring is connected with the right end inner wall of the right sliding slot, and the left end is connected with the right lip component, the right reset spring is used for providing a restoring force to move the right lip component into the right sliding slot.

[0028] Further, the left sliding slot and the right sliding slot are through slots penetrating through the front end face and the rear end face of the nozzle seat;

[0029] The front end face of the left lip component is flush with the front end face of the nozzle seat, and the rear end face of the left lip component is flush with the rear end face of the nozzle seat;

[0030] The front end face of the right lip component is flush with the front end face of the nozzle seat, and the rear end face of the right lip component is flush with the rear end face of the nozzle seat.

[0031] Further, the front baffle and the rear baffle are further included;

[0032] The front baffle is detachably connected to the front end face of the nozzle seat and is used for covering the front end openings of the left sliding slot and the right sliding slot;

[0033] The rear baffle is detachably connected to the rear end face of the nozzle seat and is used for covering the rear end face openings of the left sliding slot and the right sliding slot;

[0034] The front baffle and the rear baffle are respectively in sliding sealing cooperation with the front end face and the rear end face of the left lip component and the right lip component, and jointly form a sealing structure for preventing fluid from leaking from the front end and the rear end of the nozzle.

[0035] The application further discloses a nozzle assembly comprising the extension assembly and the nozzle structure;

[0036] The nozzle seat top of the nozzle structure is fixedly provided with a connecting seat, a connecting ring is rotatably sleeved on the connecting seat, and a connecting channel is formed in the connecting seat, one end of the connecting channel is communicated with the fluid inlet of the nozzle seat, and the other end forms an opening for fluid to enter;

[0037] The extension assembly comprises a flow guide channel for guiding the fluid sprayed by the nozzle, and an extension suction head arranged in the flow guide channel; the flow guide channel is an extendable channel comprising a connecting ring connecting end for connecting with the connecting ring, and an extension suction head connecting end for mounting the extension suction head;

[0038] The opening side of the flow guide channel at least comprises the connecting ring connecting end, the extension suction head connecting end and the bottom of the flow guide channel;

[0039] The extension suction head is located in the flow guide channel and is fixedly mounted at the extension suction head connecting end of the flow guide channel, and the extension suction head is fixedly connected with the inner wall of the flow guide channel;

[0040] The connecting ring connecting end of the flow guide channel is provided with an electromagnet, and the flow guide channel is detachably connected with the connecting ring through the electromagnet;

[0041] When the connecting ring connecting end of the flow guide channel is connected with the connecting ring, the nozzle of the nozzle structure is located inside the connecting ring connecting end of the flow guide channel, a suction nozzle is formed on the side of the extension suction head facing the connecting ring connecting end, and the suction nozzle is used to suck the fluid sprayed by the nozzle from the connecting ring connecting end of the flow guide channel to the extension suction head connecting end.

[0042] Further, the flow guide channel comprises a connecting ring connecting section and an extension suction head connecting section;

[0043] One end of the connecting ring connecting section is the connecting ring connecting end of the flow guide channel, and the end is provided with the electromagnet, and the other end is inserted into the extension suction head connecting section and can slide along the length direction of the extension suction head connecting section;

[0044] One end of the extension suction head connecting section cooperates with the connecting ring connecting section, and the other end is the extension suction head connecting end of the flow guide channel and is fixedly connected with the extension suction head.

[0045] Further, the cross sections of the connecting ring connecting section and the extension suction head connecting section are both L-shaped, and the combination of the two forms the extendable flow guide channel with the connecting ring connecting end, the extension suction head connecting end, the bottom of the flow guide channel and the side opening; the connecting ring connecting section and the extension suction head connecting section both comprise a horizontal top plate and a vertical side plate perpendicular to each other, and one side edge of the horizontal top plate is fixedly connected with the top of the vertical side plate.

[0046] Further, the nozzle structure has a slit extending from the front end to the rear end of the nozzle seat, and when the connecting ring of the flow guide channel is connected to the connecting ring, the length direction of the slit is consistent with the suction direction of the suction nozzle.

[0047] Further, the right end surface of the left lip member is an arc surface in a vertical plane, and the left end surface of the right lip member is an arc surface in a vertical plane, and the two arc surfaces cooperate to form a slit; both the two arc surfaces are provided with spiral flow guide lines extending along the length direction of the slit, and the rotation direction of the spiral flow guide lines is from the end of the slit away from the suction nozzle to the end of the slit close to the suction nozzle.

[0048] In summary, due to the adoption of the above technical solutions, the present application has the following advantages:

[0049] In view of the problem that the slit width of the existing slit nozzle cannot be adjusted, the present application adjusts the slit width of the nozzle by setting the relatively movable lip member, the guide structure and the adjusting structure. Without replacing the nozzle, the present application can adapt to different scene requirements: when coating, the present application can match different substrate materials, coating fluid viscosity and coating thickness, so as to avoid sagging caused by too thick coating layer and missing coating caused by too thin coating layer; when cleaning, the present application can adjust the fluid pressure and flow to adapt to different pollution levels of the workpiece; when hot processing, the present application can adjust and control the cooling medium parameters to ensure the performance of the workpiece; when agricultural spraying, the present application can accurately adjust the droplet and range; at the same time, after the nozzle is worn, the present application can compensate for the wear amount by adjusting, thereby prolonging the service life of the nozzle structure, reducing the equipment investment and use cost, and improving the production efficiency.

[0050] At the same time, in the nozzle assembly of the present application, the nozzle structure and the extension assembly are combined, and can coat or clean the surface of the object to be processed with different shapes and sizes. BRIEF DESCRIPTION OF DRAWINGS

[0051] Figure 1 FIG. 1 is a sectional view of the nozzle structure;

[0052] Figure 2 FIG. 2 is a perspective view of the nozzle structure;

[0053] Figure 3 FIG. 3 is a structure diagram of the nozzle seat provided with a connecting seat at the top;

[0054] Figure 4 FIG. 4 is a perspective view of the nozzle seat provided with a connecting seat at the top;

[0055] Figure 5 FIG. 5 is a structure diagram of the nozzle assembly;

[0056] Figure 6 FIG. 6 is a structure diagram of the extension assembly;

[0057] Figure 7 FIG. 7 is a structure diagram of the left lip member and the right lip member, in which the right end surface of the left lip member and the left end surface of the right lip member are both arc surfaces in a vertical plane.

[0058] Figure 8 Figure 1 is a schematic view of a rubber coating surface of an automobile engine cylinder body;

[0059] In the figure, 1-nozzle seat, 2-left reset spring, 3-left adjusting bolt, 4-left sliding groove, 5-left lip member, 6-nozzle, 7-right lip member, 8-right sliding groove, 9-right adjusting bolt, 10-right reset spring, 11-connection seat, 12-connection ring, 13-flow guide channel, 131-connection ring connection section, 132-extended suction head connection section, 1311-horizontal top plate, 1312-vertical side plate, 14-extended suction head, 15-suction nozzle, 16-rubber coating surface, 161-inner edge, 162-outer edge, 17-fluid channel. DETAILED DESCRIPTION

[0060] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. The components of the embodiments of the present application described and shown in the accompanying drawings can be arranged and designed in various different configurations.

[0061] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work under the premise that there is no conflict, belong to the scope of protection of the present application.

[0062] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0063] It should be noted that: similar reference numerals and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0064] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly understood by those skilled in the art, or the orientation or positional relationship commonly understood by those skilled in the art, only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second" and the like are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0065] In the description of the present application, it should be noted that unless otherwise specified and limited, the terms "set", "mount", "connected", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be connected inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0066] Embodiment 1

[0067] As shown in Figure 1 and Figure 2 The present application discloses a nozzle structure, comprising a nozzle seat 1, two relatively movable lip members, a guide structure and an adjusting structure;

[0068] The fluid passage 17 is vertically through the top and bottom of the nozzle seat 1, and forms a fluid inlet at the top of the nozzle seat 1 and a fluid outlet at the bottom of the nozzle seat 1.

[0069] Two said lip members are arranged at the fluid outlet, and a spout 6 is formed between the two lip members and communicated with the fluid outlet.

[0070] The guide structure is arranged on the nozzle seat 1, which is used to form a movable connection between the two lip members and the nozzle seat 1, and guide the two lip members to move linearly in the left-right direction.

[0071] The adjusting structure is arranged on the nozzle seat 1, which is used to drive the two lip members to move closer to or away from each other, so as to adjust the size of the slit of the spout 6.

[0072] The present application can realize flexible adjustment of the slit width of the nozzle 6 by setting the relatively movable lip member, the guide structure and the adjusting structure, without the need to replace the nozzle to adapt to different scene requirements. During coating, it can match different substrate materials, coating fluid viscosity and coating thickness, avoiding sagging caused by too thick coating layer and missing coating caused by too thin coating layer; during cleaning, it can adjust the fluid pressure and flow to adapt to workpieces with different degrees of pollution; during thermal processing, it can adjust and control the cooling medium parameters to ensure the performance of the workpiece; during agricultural spraying, it can accurately adjust the droplets and range; at the same time, after the nozzle 6 is worn, the wear amount can be compensated by adjustment, prolonging the service life of the nozzle structure, reducing equipment investment and use cost, and improving production efficiency.

[0073] Further, as shown in Figure 1 and Figure 2 , the guide structure comprises a left sliding groove 4 opened in the left inner wall of the nozzle seat 1 and a right sliding groove 8 opened in the right inner wall of the nozzle seat 1, the opening direction of the left sliding groove 4 is right, and the opening direction of the right sliding groove 8 is left; the left sliding groove 4 and the right sliding groove 8 are both arranged close to the fluid outlet; the two lip members are respectively a left lip member 5 and a right lip member 7, the left end of the left lip member 5 is inserted into the left sliding groove 4 and can slide left and right along the left sliding groove 4, and the right end of the right lip member 7 is inserted into the right sliding groove 8 and can slide left and right along the right sliding groove 8.

[0074] Through the guide design of the left sliding groove 4 and the right sliding groove 8, the left lip member 5 and the right lip member 7 slide linearly in the left-right direction, accurately constrain the movement trajectory of the lip member, and avoid the problem of uneven slit of the nozzle 6 caused by deviation and inclination during adjustment.

[0075] Further, as shown in Figure 1 , the adjusting structure comprises a left adjusting bolt 3, a right adjusting bolt 9, a left reset spring 2 and a right reset spring 10; the left adjusting bolt 3 is located on the left side of the nozzle seat 1, and the left adjusting bolt 3 is threadedly connected with the left side wall of the nozzle seat 1, the right end of the left adjusting bolt 3 penetrates the left end inner wall of the left sliding groove 4 and extends into the left sliding groove 4 and abuts against the left end of the left lip member 5; when the left adjusting bolt 3 is screwed right, the left lip member 5 can be pushed out of the left sliding groove 4;

[0076] the right adjusting bolt 9 is located on the right side of the nozzle seat 1, and the right adjusting bolt 9 is threadedly connected with the right side wall of the nozzle seat 1, the left end of the right adjusting bolt 9 penetrates the right end inner wall of the right sliding groove 8 and extends into the right sliding groove 8 and abuts against the right end of the right lip member 7; when the right adjusting bolt 9 is screwed left, the right lip member 7 can be pushed out of the right sliding groove 8;

[0077] The left reset spring 2 is arranged in the left sliding groove 4 and sleeved on the left adjusting bolt 3, the left end of the left reset spring 2 is connected with the inner wall of the left end of the left sliding groove 4, the right end is connected with the left lip member 5, and the left reset spring 2 is used for providing a restoring force to move the left lip member 5 into the left sliding groove 4.

[0078] The right reset spring 10 is arranged in the right sliding groove 8 and sleeved on the right adjusting bolt 9, the right end of the right reset spring 10 is connected with the inner wall of the right end of the right sliding groove 8, and the left end is connected with the right lip member 7, and the right reset spring 10 is used for providing a restoring force to move the right lip member 7 into the right sliding groove 8.

[0079] Due to the above structure, the extension amount of the left lip member 5 and the right lip member 7 can be accurately controlled by rotating the left adjusting bolt 3 and the right adjusting bolt 9, and the slit width can be accurately adjusted to adapt to the spraying requirements of different fluids from low viscosity to high viscosity; the left reset spring 2 and the right reset spring 10 can provide stable restoring force when the bolt is rotated out, so that the left lip member 5 and the right lip member 7 are reset synchronously; the structure does not need complex driving components, has low cost and is easy to operate.

[0080] Further, the left sliding groove 4 and the right sliding groove 8 are through grooves penetrating through the front end face and the rear end face of the nozzle seat 1;

[0081] The front end face of the left lip member 5 is flush with the front end face of the nozzle seat 1, and the rear end face of the left lip member 5 is flush with the rear end face of the nozzle seat 1;

[0082] The front end face of the right lip member 7 is flush with the front end face of the nozzle seat 1, and the rear end face of the right lip member 7 is flush with the rear end face of the nozzle seat 1.

[0083] In the present application, the left sliding groove 4 and the right sliding groove 8 adopt a through groove design penetrating through the front end face and the rear end face of the nozzle seat 1, which facilitates the installation, disassembly and maintenance of the left lip member 5 and the right lip member 7, and reduces the difficulty of nozzle cleaning and component replacement; the front and rear end faces of the left lip member 5 and the right lip member 7 are flush with the front and rear end faces of the nozzle seat 1, which can avoid turbulence or leakage of fluid into the left sliding groove 4 and the right sliding groove 8.

[0084] Further, the nozzle structure further comprises a front baffle and a rear baffle;

[0085] The front baffle is detachably connected to the front end face of the nozzle seat 1 and is used for covering the front end openings of the left sliding groove 4 and the right sliding groove 8;

[0086] The rear baffle is detachably connected to the rear end face of the nozzle seat 1 and is used for covering the rear end openings of the left sliding groove 4 and the right sliding groove 8;

[0087] The front baffle and the rear baffle are in sliding sealing cooperation with the front end face and the rear end face of the left lip member 5 and the right lip member 7 respectively, and jointly form a sealing structure for preventing fluid from leaking from the front and rear ends of the nozzle 6.

[0088] The front baffle and the rear baffle are in sliding sealing cooperation with the left lip member 5 and the right lip member 7, effectively seal the front and rear openings of the left sliding groove 4 and the right sliding groove 8, and solve the problem of fluid leakage from the front and rear ends of the nozzle 6. The front baffle and the rear baffle are designed to be detachable, which facilitates regular cleaning and maintenance, prolongs the service life of the nozzle, and reduces maintenance costs.

[0089] Embodiment 2

[0090] As shown in Figures 3-7 , the present application discloses a nozzle assembly, comprising an extension assembly and the nozzle structure described in embodiment 1;

[0091] As shown in Figure 3 and Figure 4 , the nozzle seat 1 of the nozzle structure is fixedly provided with a connecting seat 11 at the top, a connecting ring 12 is rotatably sleeved on the connecting seat 11, and a connecting channel is formed in the connecting seat 11. One end of the connecting channel is in communication with the fluid inlet of the nozzle seat 1, and the other end forms an opening for the fluid to enter;

[0092] As shown in Figure 5 and Figure 6 , the extension assembly comprises a flow guide channel 13 for guiding the fluid sprayed out of the nozzle 6, and an extension suction head 14 arranged in the flow guide channel 13; the flow guide channel 13 is an extendable channel, comprising a connecting ring connecting end for connecting with the connecting ring 12 and an extension suction head connecting end for mounting the extension suction head 14;

[0093] The opening side of the flow guide channel 13 at least comprises the connecting ring connecting end, the extension suction head connecting end and the bottom of the flow guide channel 13;

[0094] The extension suction head 14 is located in the flow guide channel 13 and is fixedly mounted at the extension suction head connecting end of the flow guide channel 13, and the extension suction head 14 is fixedly connected with the inner wall of the flow guide channel 13;

[0095] The connecting ring connecting end of the flow guide channel 13 is provided with an electromagnet, and the flow guide channel 13 is detachably connected with the connecting ring 12 through the electromagnet;

[0096] When the connecting ring connecting end of the flow guide channel 13 is connected with the connecting ring 12, the nozzle 6 of the nozzle structure is located inside the connecting ring connecting end of the flow guide channel 13, a suction nozzle 15 is formed on the side of the extension suction head 14 facing the connecting ring connecting end, and the suction nozzle 15 is used to suck the fluid sprayed out of the nozzle 6 from the connecting ring connecting end of the flow guide channel 13 to the extension suction head connecting end.

[0097] From the application number 202321942936.7, 201010194098.0, 200410032967.4, 201510317541.1 disclosed slit nozzle can know that the length of the existing slit nozzle nozzle is consistent with the width of the surface of the treated object, that is, the slit length is equal to the width of the treated object. When working, the slit nozzle moves along the length direction of the treated object, that is, moves along the width direction of the slit, and the fluid from the nozzle is coated on the treated object.

[0098] The existing coating method depends on the mode of "slit length matching the surface size of the treated object". When the surface width of the treated object is large, a slit nozzle with a longer slit needs to be selected; when the surface width of the treated object is small, a slit nozzle with a shorter slit needs to be replaced, and the effective coating range of the nozzle cannot be adjusted according to the width of the surface of the treated object. This way causes that each time a kind of treated object is replaced, the slit nozzle needs to be replaced correspondingly, not only increases the inventory cost of spare parts of the slit nozzle, but also needs to frequently stop for disassembly and debugging of the nozzle, which is complicated to operate and easy to produce positioning deviation, seriously affects the production efficiency.

[0099] In view of the above problems, the present application designs a nozzle assembly, the connecting ring of the flow guide channel 13 is connected with the electromagnet on the connecting ring 12 of the nozzle structure connecting seat 11, and the linkage structure of the nozzle structure and the extension assembly can be quickly formed by suction. When working, the nozzle structure nozzle 6 moves along the first boundary of the treated object surface and sprays fluid, and the suction nozzle 15 of the extension suction head 14 moves along the second boundary of the treated object surface synchronously, and the fluid is extended from the first boundary to the second boundary in the flow guide channel 13 by the action of negative pressure, which completely covers the area between the two boundaries, and successfully realizes the morphological transformation of the fluid on the surface of the treated object from "linear or strip" to "plane". The first boundary and the second boundary are the opposite boundaries of the area to be covered on the surface of the treated object, such as the inner and outer edges 162 of the annular surface, the opposite edges of the rectangular plane, and the two profile edges of the irregular surface. When working, the length of the nozzle 6 is less than the distance between the first boundary and the second boundary.

[0100] This invention relies on the expandable characteristics of the flow guide channel 13 and the design of the connecting ring 12, which can rotate around the connecting seat 11. When the extended suction head 14 moves along the second boundary path of the surface of the object being processed, the flow guide channel 13 can adjust its length and angle in real time. When the area to be covered on the surface of the object being processed widens, it automatically lengthens. When encountering corners or curved boundaries, the connecting ring 12 rotates around the connecting seat 11, always precisely fitting the actual size and shape of the area to be covered on the surface of the object being processed. This adjustment requires no machine downtime and no manual intervention, achieving automatic adaptation. It eliminates the need to customize a special nozzle structure for specific objects being processed, greatly enhancing the versatility of the equipment, significantly reducing the investment in production equipment and spare parts inventory costs, completely avoiding production interruptions caused by frequent nozzle replacements, ensuring continuous operation, and significantly improving production efficiency.

[0101] The "suction nozzle adsorption" method is used to extend the fluid from "linear or strip-shaped" to "surface". Compared with the existing "blowing diffusion" solution, the adsorption design can make the fluid converge and flow, and it is easier to control the endpoint of the fluid flow. It effectively avoids the large amount of fluid diffusion and loss from the side of the guide channel 13, which not only improves the fluid utilization efficiency, but also optimizes the uniformity and accuracy of "surface coverage" and further ensures the quality of operation.

[0102] Meanwhile, this invention positions the extension suction head 14 at the first boundary, achieving the extension from a "linear or strip-like" to a "surface" through suction, rather than using a blowing method at the first boundary. Blowing causes the coating liquid, cleaning liquid, cooling medium, and other fluids to spread out, making it difficult to control the endpoint of the fluid. Suction, on the other hand, concentrates the fluid in one place, making it easier to control the endpoint and thus achieving a better "linear" to "surface" effect. Furthermore, suction concentrates the fluid impact force during cleaning, improving stain removal rate; during coating, it improves coating uniformity and reduces paint waste; and it enhances the utilization efficiency of various fluids.

[0103] Furthermore, such as Figure 6 As shown, the flow channel 13 includes a connecting ring connecting section 131 and an extension suction head connecting section 132;

[0104] One end of the connecting ring connecting section 131 is the connecting ring connecting end of the flow guiding channel 13, and the electromagnet is provided at this end. The other end is inserted into the extension suction head connecting section 132 and can slide along the length direction of the extension suction head connecting section 132.

[0105] One end of the extended suction head connecting section 132 is engaged with the connecting ring connecting section 131, and the other end is the extended suction head connecting end of the flow channel 13, and is fixedly connected to the extended suction head 14.

[0106] Furthermore, such as Figure 6As shown, the connecting ring connecting section 131 and the extension suction head connecting section 132 are both L-shaped in cross section, and the combination of the two forms the telescopic flow guide channel 13 with the connecting ring connecting end, the extension suction head connecting end, the bottom of the flow guide channel 13 and the side opening.

[0107] The connecting ring connecting section 131 and the extension suction head connecting section 132 both include a horizontal top plate 1311 and a vertical side plate 1312 perpendicular to each other, and one side edge of the horizontal top plate 1311 is fixedly connected to the top of the vertical side plate 1312.

[0108] In the present application, the flow guide channel 13 is selected to be a semi-closed structure, and when the nozzle structure and the extension assembly form a linkage structure, the flow guide channel 13 covers the surface of the object being processed, and during the forward movement of the linkage structure, the vertical side plate 1312 is located in front of the movement direction, and the side without the vertical side plate 1312 is the rear. The horizontal top plate 1311 can block the upward dispersion of the fluid, and the vertical side plate 1312 can constrain the lateral diffusion of the fluid; the side opening design does not affect the coverage of the fluid on the surface of the object being processed, and also facilitates the observation of the fluid flow state in the channel, such as whether it is blocked and whether the flow is uniform, facilitating timely troubleshooting. At the same time, the coated fluid can flow out from the side without the vertical side plate 1312, facilitating the fluid to cover the surface of the object being processed.

[0109] The nozzle structure has a nozzle 6 which is a slit extending from the front end to the rear end of the nozzle seat 1, and when the connecting ring connecting end of the flow guide channel 13 is connected to the connecting ring 12, the length direction of the slit is consistent with the suction direction of the suction nozzle 15, so that one end of the slit is arranged close to the suction nozzle 15, and the other end is arranged away from the suction nozzle 15, to adapt to the fluid suction demand of the suction nozzle 15 on the corresponding end of the slit.

[0110] During operation, the end of the nozzle 6 away from the suction nozzle 15 is located at the first boundary, and during operation, linear or strip-shaped fluid is sprayed at the first boundary, and the suction nozzle 15 synchronously generates negative pressure at the second boundary, so that the suction direction is always consistent with the length direction of the slit, which is more conducive to forming a directional flow path for the fluid from the first boundary to the second boundary without the need for additional guidance.

[0111] Further, the right end face of the left lip member 5 is an arc face located in a vertical plane, and the left end face of the right lip member 7 is an arc face located in a vertical plane, and the two arc faces cooperate to form the slit. Figure 7As shown; both arc surfaces are provided with spiral flow guide lines extending along the length direction of the slit, the spiral flow guide lines are spirally arranged from the end of the slit away from the suction nozzle 15 to the end of the slit close to the suction nozzle 15, and the pitch of the spiral flow guide lines gradually decreases from the end of the slit away from the suction nozzle 15 to the end of the slit close to the suction nozzle 15, for guiding the fluid to move quickly along the length direction of the slit to the end of the slit close to the suction nozzle 15, further improving the efficiency of the fluid being sucked to the suction nozzle 15; the design cooperates with the suction force to further improve the efficiency and stability of the fluid being sucked by the suction nozzle 15, and adapts to different viscosity fluids and operation requirements in various fields. In actual application, dripping or missing coating can be avoided during coating, and the flatness of the coating can be improved; concentrated fluid impact force can be generated during cleaning to efficiently remove stubborn stains; and the flow of the cooling medium can be accelerated during quenching to ensure uniform cooling rate of the workpiece.

[0112] The suction nozzle 15 is located on the side of the extended suction head 14 close to the connecting ring connecting end, and the side of the extended suction head 14 away from the connecting ring connecting end is provided with an extended suction head 14 outlet.

[0113] In order to better understand the nozzle assembly of the present application, the present application takes a box part as an example to introduce the use method of the nozzle assembly of the present application. The box part includes a box cover and a box body, which often need to be coated with glue for sealing. The coating surface 16 of the top of the box body is often an annular surface, such as an automobile engine cylinder body. The present application takes the coating of the automobile engine cylinder body as an example to introduce the use method of the nozzle assembly of the present application.

[0114] Since the coating surface 16 of the automobile engine cylinder body is an annular surface, as shown in the figure, the first boundary of the coating surface 16 is the inner edge 161, and the second boundary of the coating surface 16 is the outer edge 162; the use method of the nozzle assembly of the present application is as follows: Figure 8

[0115] A use method of a nozzle assembly, comprising the following steps:

[0116] S1. Workpiece pretreatment: cleaning the coating surface 16 of the workpiece to be coated with glue, removing surface impurities and oil stains, and stably clamping the workpiece to be coated with glue on the clamping table of the workpiece clamping platform;

[0117] S2. Coating surface 16 boundary detection: starting the first camera and the second camera, the first camera detects the profile of the first boundary of the coating surface 16 under the drive of the first camera mechanical hand, the second camera detects the profile of the second boundary of the coating surface 16 under the drive of the second camera mechanical hand, extracts the profile information of the two boundaries and calculates the distance parameter W between the two boundaries;

[0118] ​S3. The nozzle structure is connected with the extension assembly: the nozzle structure is installed on the glue applying robot, the extension assembly is installed on the glue sucking robot, the glue applying robot and the glue sucking robot are controlled to move cooperatively, the connecting ring connecting end of the flow guide channel 13 is attracted by the connecting ring 12 on the connecting seat 11 of the nozzle structure through the electromagnet, the linkage structure of the nozzle structure and the extension assembly is formed; at the same time, the length direction of the slit in the nozzle structure is kept consistent with the suction force direction of the suction nozzle 15, and the end of the nozzle 6 far away from the suction nozzle 15 is accurately positioned at the first boundary, and the length direction of the slit is perpendicular to the tangent of the first boundary;

[0119] S4. Glue discharging and extension: the nozzle structure is controlled to move along the first boundary of the glue applying surface 16 and extrude the sealant, and the suction nozzle 15 of the extension suction head 14 is controlled to move along the second boundary of the glue applying surface 16 and generate negative pressure adsorption on the sealant; under the action of the negative pressure, the sealant is smoothly extended in the flow guide channel 13 from the first boundary to the second boundary, and completely covers the area between the two boundaries;

[0120] S5. Glue layer coverage detection: the coverage of the sealant on the glue applying surface 16 is detected in real time through the first camera and the second camera;

[0121] S6. Glue applying stop and end: when it is detected that the coverage reaches the set threshold, the nozzle structure stops discharging glue, the suction nozzle 15 stops adsorption, the electromagnet is disconnected, and the nozzle structure and the extension suction head 14 are separated.

[0122] The method cooperates the nozzle structure and the extension assembly, without the need of customizing a special nozzle structure for a specific workpiece, so that the glue applying surface 16 of different shapes and sizes can be adapted, the universality of the equipment is greatly enhanced, and the production equipment investment and spare parts inventory cost are reduced.

[0123] Further, in step S4, the glue discharging speed V 胶 is set according to the following formula:

[0124] V 胶 =x×(W-L0)+y+z×max(0,μ-2000) / 1000;

[0125] Wherein: V 胶 is the glue discharging speed, unit: ml / s; W is the interval parameter, unit: mm; L0 is the slit length of the nozzle structure, unit: mm; μ is the viscosity of the sealant, unit: mPa·s; x is the interval speed coefficient, x=0.02; y is the basic glue discharging constant, y=0.15; z is the viscosity glue discharging coefficient, z=0.07; V 胶 is in the range of 0.25-1.1 ml / s.

[0126] V 胶The determination formula fully considers the influence of the actual extension distance (W-L0) of the glue applying surface 16 and the sealant viscosity μ on the glue output.

[0127] The actual extension distance (W-L0) is the distance from the end of the slit close to the second boundary to the second boundary; when the actual extension distance (W-L0) increases, the glue applying area to be covered is wider, and the glue output needs to be increased through the term x×(W-L0) to fill the area; when the sealant viscosity μ exceeds 2000 mPa·s, the flowability of the glue solution becomes poor, and the glue output needs to be supplemented through the term z×max(0,μ-2000) / 1000 to avoid glue application vacancy caused by slow flow of the glue solution; y=0.15 as a basic glue output constant ensures that even in the case of small spacing and low viscosity, there is enough glue solution to start the coating process, and finally realizes precise matching of the glue output and glue applying demand under different working conditions, avoiding both glue solution waste and seal failure caused by insufficient glue amount.

[0128] The slit width d is set according to the following formula: d=d0+k1+V 胶 +k2×max(0,μ-2000) / 1000;

[0129] Wherein: d is the slit width, unit: mm; V 胶 is the glue output speed, unit: ml / s; μ is the sealant viscosity, unit: mPa·s; d0 is the basic slit width, k1 is the glue output speed correlation coefficient, k1=0.3; k2 is the high viscosity correction coefficient, k2=0.05.

[0130] Further, in step S4, the negative pressure system provides negative pressure through the air outlet at the rear end of the extension suction head 14, and the negative pressure value P is set according to the following formula:

[0131] P=-[a×(W-L0)+b×V 胶 +K×(μ-2000) / 1000];

[0132] Wherein: P is the negative pressure value, unit: kPa; the negative sign indicates negative pressure, W is the spacing parameter, unit: mm; L0 is the slit length of the nozzle structure, unit: mm; V 胶 is the glue output speed, unit: ml / s; μ is the sealant viscosity, unit: mPa·s; a is the spacing coefficient, a=0.2; b is the glue output speed influence coefficient, b=0.4; K is the viscosity correction coefficient, K=1.2; the value range of P is-3 kPa to-18 kPa, and the greater V 胶 , the greater the absolute value of P, to ensure that the negative pressure is increased synchronously to realize uniform glue spreading when the glue output is increased.

[0133] In the present application, the greater the actual extension distance (W-L0) of the glue applying surface 16, the farther the distance of the glue from the slit to the second boundary, and the greater the absolute value of the negative pressure required to ensure the adsorption effect through the a×(W-L0) term; the greater the glue discharge speed V 胶 , the more glue is extruded per unit time, and the greater the absolute value of the negative pressure required to avoid the accumulation of glue in the flow guide channel 13 through the b×V 胶 term; when the viscosity μ of the sealant exceeds 2000 mPa·s, the viscous resistance of the glue increases, and the negative pressure needs to be increased through the K×(μ-2000) / 1000 term to overcome the resistance and achieve glue flow;

[0134] The negative pressure value is limited to -3 kPa to -18 kPa, which avoids too small negative pressure that cannot adsorb glue, and prevents too large negative pressure that can break or suck the glue into the negative pressure system, while V 胶 is greater, the greater the absolute value of P, which ensures that the glue discharge amount and the adsorption force are matched in real time, realizes uniform glue spreading on the glue applying surface 16, and guarantees the integrity of the sealant layer.

[0135] Further, in step S4, the moving speed of the nozzle structure and the extension suction head 14 needs to be determined as follows:

[0136] When the glue applying path is a straight line segment, the speed of the nozzle structure moving along the first boundary of the glue applying surface 16 is denoted as V 内移 ; and the speed of the extension suction head 14 moving along the second boundary of the glue applying surface 16 is denoted as V 外移 .

[0137] At this time, V 内移 and V 外移 are consistent, i.e., V 内移 is equal to V 外移 , and V 内移 and V 外移 are both equal to the basic moving speed V 移 .

[0138] V 内移 = V 外移 = V 移 , which can avoid stretching and breaking or accumulation of glue in the straight line segment due to speed difference.

[0139] When the glue applying path is a turning segment, based on the characteristic that the track radius R 外 of the second boundary of the glue applying surface 16 is greater than the track radius R 内 of the first boundary of the glue applying surface 16, R 内 and R 外 are obtained by detecting through the first camera and the second camera in step S2. To ensure smooth flow of glue in the turning segment and avoid glue being thrown off or accumulated due to centrifugal force, the speed V外移 The speed V of the nozzle structure moving along the first boundary of the glue coating surface 16 内移 .

[0140] V 外移 The following formula is set:

[0141] V 外移 =V 内移 ×(R 外 / R 内 )。

[0142] Meanwhile, the speed V of the nozzle structure moving along the first boundary of the glue coating surface 16 内移 needs to be reduced by 30% to 50% on the basis of the basic moving speed V 移 , that is, V 内移 =V 移 ×[1-30% to 50%)].

[0143] The basic moving speed V 移 is used as the value of V 内移 and V 外移 when the straight section is linear, and as the calculation reference of V 内移 when the turning section is curved.

[0144] The basic moving speed V 移 is set according to the following formula:

[0145] V 移 =m×V 胶 +n×|P|+q;

[0146] In the formula, V 移 is the basic moving speed, with the unit of mm / s; V 胶 is the glue discharge speed, with the unit of ml / s; |P| is the absolute value of the negative pressure, with the unit of kPa; m is the glue discharge speed coefficient, m=4.5; n is the negative pressure influence coefficient, n=0.12; q is the basic moving constant, q=0.8; and V 移 is in the range of 3 to 9 mm / s.

[0147] In the application, the greater the glue discharge speed V 胶 , the faster the moving speed is needed to avoid glue accumulation per unit length, so V 胶 is increased through the term m×V 移 ; the greater the absolute value of the negative pressure |P|, the stronger the glue adsorption force, so the moving speed can be appropriately increased while maintaining uniform coating, so the speed is assisted through the term n×|P|; and q=0.8 as the basic moving constant ensures stable glue coating in a low-speed scenario.

[0148] When turning, the speed is reduced by 30%-50%, which can avoid the glue solution from being thrown off the glue coating surface 16 or accumulated at the corner due to centrifugal force when turning, ensuring the continuous and complete glue layer at the corner, meeting the precise control requirements of the glue coating robot and the glue suction robot on the movement track, and improving the overall glue coating precision.

[0149] Further, in step S5, the specific method of the coverage detection is that the first camera and the second camera synchronously collect the glue layer images of the first boundary of the glue coating surface 16 and the second boundary area of the glue coating surface 16, divide the images into glue layer areas and non-glue layer areas, and calculate the ratio of the glue layer area to the theoretical area of the glue coating surface 16, which is the coverage rate. The theoretical area of the glue coating surface 16 is the area surrounded by the first boundary of the glue coating surface 16 and the second boundary of the glue coating surface 16.

[0150] In the present application, the first camera and the second camera focus on the first boundary of the glue coating surface 16 and the second boundary area of the glue coating surface 16, respectively, which avoids missing the edge glue layer due to the limited field of view of a single camera, ensures the detection of the full range of the glue coating surface 16, and meets the functional advantages of the double-camera robot moving the camera freely.

[0151] By quantifying the coverage rate through “glue layer area / theoretical area surrounded by the first boundary of the glue coating surface 16 and the second boundary of the glue coating surface 16”, the coverage rate is more objective and accurate compared to artificial visual observation, which can quickly identify problems such as glue layer vacancies and local accumulation, avoid the outflow of unqualified products due to subjective judgment errors, and ensure the glue coating quality.

[0152] Further, in S6, the set threshold is 90%, that is, when the coverage rate is detected to be ≥90%, the nozzle structure stops glue output and the suction nozzle 15 stops glue suction. In the present application, setting the threshold to 90% can further avoid the glue solution entering the spreading suction head 14 and avoid clogging the spreading suction head 14.

[0153] Further, in order to avoid the glue solution flowing out from the end of the nozzle 6 far from the suction nozzle 15, a front baffle or a rear baffle can be installed on the nozzle seat 1. If the front end of the nozzle 6 is far from the suction nozzle 15 and located at the first boundary, the front baffle is installed.

[0154] Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent replacements to some technical features, and any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A nozzle assembly characterized by: The nozzle structure comprises a nozzle base (1), two oppositely movable lip members, a guide structure and an adjusting structure. The nozzle base (1) is provided with a fluid passage (17) vertically penetrating the top and bottom of the nozzle base (1), and a fluid inlet is formed at the top of the nozzle base (1) and a fluid outlet is formed at the bottom of the nozzle base (1). The two lip members are arranged at the fluid outlet and a spout (6) is formed between the two lip members and communicates with the fluid outlet. The guide structure is arranged on the nozzle base (1) and is used to movably connect the two lip members with the nozzle base (1) and guide the two lip members to move linearly in the left-right direction. The adjusting structure is arranged on the nozzle base (1) and is used to drive the two lip members to move towards or away from each other to adjust the size of the slit of the spout (6). The top of the nozzle base (1) of the nozzle structure is fixedly provided with a connecting seat (11), the connecting ring (12) is rotatably arranged on the connecting seat (11), and the connecting seat (11) is provided with a connecting passage, one end of the connecting passage communicates with the fluid inlet of the nozzle base (1), and the other end forms an opening for the fluid to enter. The extension assembly comprises a flow guide passage (13) for guiding the fluid sprayed by the spout (6) and an extension suction head (14) arranged in the flow guide passage (13). The opening side of the flow guide passage (13) at least comprises the connecting ring connecting end, the extension suction head connecting end and the bottom of the flow guide passage (13). The extension suction head (14) is located in the flow guide passage (13) and is fixedly installed at the extension suction head connecting end of the flow guide passage (13), and the extension suction head (14) is fixedly connected with the inner wall of the flow guide passage (13). The connecting ring connecting end of the flow guide passage (13) is provided with an electromagnet, and the flow guide passage (13) is detachably connected with the connecting ring (12) through the electromagnet. When the connecting ring connecting end of the flow guide passage (13) is connected with the connecting ring (12), the spout (6) of the nozzle structure is located inside the connecting ring connecting end of the flow guide passage (13), the suction nozzle (15) is arranged on the side of the extension suction head (14) facing the connecting ring connecting end, and the suction nozzle (15) is used to suck the fluid sprayed by the spout (6) from the connecting ring connecting end to the extension suction head connecting end of the flow guide passage (13). In operation, the spout (6) of the nozzle structure moves along the first boundary of the surface of the object to be processed and sprays fluid, the suction nozzle (15) of the extension suction head (14) moves along the second boundary of the surface of the object to be processed synchronously, the fluid is extended from the first boundary to the second boundary in the flow guide passage (13) through the suction nozzle (15), and the area between the two boundaries is completely covered, realizing the shape change of the fluid on the surface of the object to be processed from linear or strip to plane. ​ The guide channel (13) is telescopic and rotatable around the connecting base (11) through the connecting ring (12), and can adjust its length and angle relative to the connecting base in real time when the extension suction head (14) moves along the second boundary of the surface to be processed.

2. The nozzle assembly of claim 1, wherein: The guide structure comprises a left sliding groove (4) formed in the left inner wall of the nozzle seat (1) and a right sliding groove (8) formed in the right inner wall of the nozzle seat (1), the opening direction of the left sliding groove (4) is rightward, and the opening direction of the right sliding groove (8) is leftward; the left sliding groove (4) and the right sliding groove (8) are arranged close to the fluid outlet; the two lip members are a left lip member (5) and a right lip member (7), the left end of the left lip member (5) is inserted into the left sliding groove (4) and can slide leftward and rightward in the left sliding groove (4), and the right end of the right lip member (7) is inserted into the right sliding groove (8) and can slide leftward and rightward in the right sliding groove (8).

3. The nozzle assembly of claim 2, wherein: The adjusting structure comprises a left adjusting bolt (3), a right adjusting bolt (9), a left reset spring (2) and a right reset spring (10); The left adjusting bolt (3) is located on the left side of the nozzle seat (1), and the left adjusting bolt (3) is threadedly connected with the left side wall of the nozzle seat (1), the right end of the left adjusting bolt (3) penetrates through the left end inner wall of the left sliding groove (4) and extends into the left sliding groove (4) to abut against the left end of the left lip member (5); when the left adjusting bolt (3) is screwed rightward, the left lip member (5) can be pushed to extend out of the left sliding groove (4); The right adjusting bolt (9) is located on the right side of the nozzle seat (1), and the right adjusting bolt (9) is threadedly connected with the right side wall of the nozzle seat (1), the left end of the right adjusting bolt (9) penetrates through the right end inner wall of the right sliding groove (8) and extends into the right sliding groove (8) to abut against the right end of the right lip member (7); when the right adjusting bolt (9) is screwed leftward, the right lip member (7) can be pushed to extend out of the right sliding groove (8); The left reset spring (2) is arranged in the left sliding groove (4) and sleeved on the left adjusting bolt (3), the left end of the left reset spring (2) is connected with the left end inner wall of the left sliding groove (4), and the right end is connected with the left lip member (5), the left reset spring (2) is used for providing a restoring force to move the left lip member (5) into the left sliding groove (4); The right reset spring (10) is arranged in the right sliding groove (8) and sleeved on the right adjusting bolt (9), the right end of the right reset spring (10) is connected with the right end inner wall of the right sliding groove (8), and the left end is connected with the right lip member (7), the right reset spring (10) is used for providing a restoring force to move the right lip member (7) into the right sliding groove (8).

4. The nozzle assembly of claim 2, wherein: The left sliding groove (4) and the right sliding groove (8) are through grooves penetrating through the front end face and the rear end face of the nozzle seat (1); The front end face of the left lip member (5) is flush with the front end face of the nozzle seat (1), and the rear end face of the left lip member (5) is flush with the rear end face of the nozzle seat (1). The front end surface of the right lip member (7) is flush with the front end surface of the nozzle seat (1), and the rear end surface of the right lip member (7) is flush with the rear end surface of the nozzle seat (1).

5. The nozzle assembly of claim 4, wherein: Further comprising a front baffle and a rear baffle; The front baffle is detachably connected to the front end surface of the nozzle seat (1) to cover the front end openings of the left sliding groove (4) and the right sliding groove (8); The rear baffle is detachably connected to the rear end surface of the nozzle seat (1) to cover the rear end surface openings of the left sliding groove (4) and the right sliding groove (8); The front baffle and the rear baffle are respectively in sliding sealing cooperation with the front end surface and the rear end surface of the left lip member (5) and the right lip member (7) to jointly form a sealing structure for preventing fluid from leaking from the front end and the rear end of the nozzle outlet (6).

6. The nozzle assembly of claim 1, wherein: The flow guide channel (13) comprises a connecting ring connecting section (131) and an extension suction head connecting section (132); One end of the connecting ring connecting section (131) is the connecting ring connecting end of the flow guide channel (13), and the other end is inserted into the extension suction head connecting section (132) and can slide along the length direction of the extension suction head connecting section (132); One end of the extension suction head connecting section (132) cooperates with the connecting ring connecting section (131), and the other end is the extension suction head connecting end of the flow guide channel (13) and is fixedly connected with the extension suction head (14).

7. The nozzle assembly of claim 6, wherein: The cross sections of the connecting ring connecting section (131) and the extension suction head connecting section (132) are both L-shaped, and the combination of the two forms the telescopic flow guide channel (13) with the connecting ring connecting end, the extension suction head connecting end, the bottom of the flow guide channel (13), and one side opening; The connecting ring connecting section (131) and the extension suction head connecting section (132) each comprise a horizontal top plate (1311) and a vertical side plate (1312) perpendicular to each other, and one side edge of the horizontal top plate (1311) is fixedly connected with the top of the vertical side plate (1312).

8. The nozzle assembly of claim 2, wherein: The nozzle outlet (6) of the nozzle structure is a slit extending along the front end to the rear end of the nozzle seat (1), and when the connecting ring connecting end of the flow guide channel (13) is connected with the connecting ring (12), the length direction of the slit is consistent with the suction direction of the suction nozzle (15).

9. The nozzle assembly of claim 8, wherein: The right end surface of the left lip member (5) is an arc surface in a vertical plane, the left end surface of the right lip member (7) is an arc surface in a vertical plane, and the two arc surfaces cooperate to form a slit; both the two arc surfaces are provided with helical flow guide lines extending along the length direction of the slit, and the rotation direction of the helical flow guide lines is from the end of the slit away from the suction nozzle (15) to the end close to the suction nozzle (15).

Images