Liquid injection pipe inserting unit of multi-station spray head assembly equipment

Abstract

The liquid injection pipe inserting unit of the multi-station nozzle assembly equipment has liquid injection pipe inserting branches, each of which has a profiling channel, a punching assembly and a position supplementing assembly. In one aspect, the profiling channel is shaped and reset and the liquid injection pipe is straightened by falling back, and the assembly is performed at a pressing limit position, so that multiple nozzles are aligned and inserted and punched with the same length, which not only eliminates the defect that the liquid injection pipe cannot be aligned and inserted due to deformation, but also provides necessary conditions for high-quality insertion of the liquid injection pipe. In another aspect, the liquid injection pipe is synchronously positioned and shaped, so that the length of the protruding part of the liquid injection pipe matches the length of the stepped part, and the liquid injection pipe is aligned and inserted with the assistance of the reinforced sleeve insertion end, so that the length of the inserted sleeve is consistent, the liquid injection pipe will not be pulled down when the insertion end falls back, and the downward pressure provided is equal to the upward thrust formed by the insertion, so that the installation will not cause misalignment of the internal parts.

Description

[0001] This application is a divisional application filed on October 16, 2025, with application number 2025114762456, entitled "Assembly Process of Multi-Station Sprayer Head Based on Automatic Filling and Shape Correction of Spray Pipe". Technical Field

[0002] This invention belongs to the field of sprayer processing equipment, specifically relating to a spray pipe insertion unit of a multi-station nozzle assembly equipment. Background Technology

[0003] A sprayer (or nozzle) is a tool or device that disperses liquid (or some atomizable solids) into fine droplets (or particles) through specific units and sprays them evenly onto a target area in a mist form. Its core function is to convert liquid substances into an aerosol state (microscopic suspended particles), thereby improving efficiency (such as coverage area, adhesion, etc.) or meeting specific scenario requirements (such as disinfection, dust suppression, pesticide application, etc.). A common example is a perfume spray head, which includes a perfume spray head, a press cap, and an outer cap. The press cap includes a bottle cap and a pressure cap with a spray channel. The spray channel is connected to the liquid outlet tube of the perfume spray head. When the pressure cap is pressed down, the liquid inside the perfume spray head is compressed and sprayed out from the liquid outlet tube and spray channel, thus completing the perfume spraying. Specifically, the length of the spray tube is cut according to usage needs. However, in the actual insertion process, due to the deformation and difficulty in repositioning of the spray tube itself, the following insertion defects exist: 1) The cutting is based on the insertion of the plug, that is, the part of the insertion port is punched. The punching process will cause deformation of the injection port of the spray tube. Once the deformation cannot be restored to its natural state (or the end cannot be corrected), it will directly cause difficulty in the alignment and insertion of the next nozzle body, and it is easy to fail to insert properly, and there is also a probability that it cannot be inserted at all. 2) The length of the insert formed by the liquid spray tube inserted into the outer periphery of the nozzle body is difficult to control. However, if the insert is too short, the probability of falling off will be high, making it difficult to control the product qualification rate. 3) During the conventional insertion process, the tube end expands outward due to insertion and tightens against the inner wall of the insert. When the insertion is completed, the insert will pull the spray tube as it falls, which will lead to insertion failure. At the same time, the insertion head cannot effectively straighten the spray tube, resulting in inconsistent punching lengths, which will affect the product qualification rate. 4) The spray pipe used is generally coiled. When the spray pipe itself is squeezed or deformed, it is difficult to align and insert it. That is, the resulting disassembly and assembly strain capacity is very poor. 5) Under the premise of continuous supply of spray pipe, the assembly of individual nozzles is generally carried out. Therefore, the resulting assembly efficiency is low. At the same time, if the insertion is not carried out at the limit position, the insertion process will affect the assembly quality of the nozzle body components. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide an improved liquid spray pipe insertion unit for a multi-station nozzle assembly device.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows: A spray pipe insertion unit for a multi-station nozzle assembly device. The assembly device includes a nozzle body positioning unit and a spray pipe insertion unit. The nozzle body has a stepped portion with a gradually decreasing outer diameter at the liquid inlet end and a disassembly / assembly portion extending downward from the bottom of the stepped portion. The positioning unit has multiple aligned and spaced assembly stations. The spray pipe insertion unit has spray pipe insertion branches corresponding to each assembly station. Each spray pipe insertion branch has a correction channel capable of multi-point limiting and abutment from the outer periphery to restore deformation, a punching component perpendicular to the correction channel, and a spray pipe replacement component. The correction channel starts from the center... It consists of multiple contact groups aligned vertically, with each contact group having multiple circumferentially spaced contacts. The contacts between two adjacent contact groups are staggered vertically. The punching component crosses the straightening channel to perform horizontal punching. The filling component is used to fill the gap while the spray pipe is being shaped upwards after cutting. When the downward pressure limit position is formed by each assembly station, each spray pipe insertion branch moves upwards synchronously and is inserted into the spray pipe by the disassembly and assembly part. At the same time, the top of the straightening channel abuts against the lower diameter end of the stepped part, and the insertion pipe section deforms and is fitted into the stepped part. The downward pressure provided is equal to the upward force formed by the insertion.

[0006] Preferably, each calibration channel is formed by a tube assembly that runs through the upper and lower insert base, and the calibration channels are installed in parallel on the same insert base that can move up and down. A power component is used to drive the insert base to move up for insertion, move down for straightening, and perform alignment punching.

[0007] According to a specific embodiment and preferred aspect of the present invention, the cannulation kit includes a sleeve, a plurality of freely rolling balls formed on the inner wall of the sleeve, the plurality of balls being spaced apart vertically, and each set of balls being spaced apart around the circumference of the sleeve to form an annular channel that rolls against the outer circumference of the spray tube.

[0008] Preferably, the centers of the multiple annular channels are aligned, and the multiple annular channels form a straightening channel through which the spray pipe passes.

[0009] Furthermore, the liquid spray pipe, which is ejected from the bottom up, emerges from the top of the sleeve after being aligned by the alignment channel against the outer periphery to restore its deformation, and the length of the emerging pipe is equal to the length of the stepped section.

[0010] In some specific embodiments, the sleeve passes through the insert seat and protrudes from both the upper and lower ends, wherein the upper end constitutes the insert end, and the insert end is wrapped around the disassembly part during alignment insertion; and / or, during alignment insertion, the insert end is located below the variable diameter end of the stepped part.

[0011] According to another specific embodiment and preferred aspect of the invention, each pair of adjacent sets of balls is arranged with a vertically staggered layout. This staggered layout allows for better shaping.

[0012] Specifically, in the axial projection of the cannulation kit, multiple sets of ball bearings form contact points spaced apart around the center of the sleeve; or, in the axial projection of the cannulation kit, multiple contacts are connected to form a ring that matches the outer diameter of the spray tube. Regardless of how the contacts are distributed, they are always on a circular trajectory, thus enabling a more comprehensive self-circumferential compression correction of the spray tube.

[0013] In some specific implementations, each contact group is formed by multiple omnidirectional rollers evenly distributed around the center of the alignment channel, with each omnidirectional roller forming one contact point. The rolling of the omnidirectional rollers reduces obstruction to the spray nozzle, allowing for smoother nozzle alignment and straightening.

[0014] According to another specific embodiment and preferred aspect of the present invention, the filling assembly includes a power member for up-and-down movement, a filling sleeve, and a spring, wherein the spray pipe passes through the correction channel from inside the filling sleeve, and the spray pipe is filled upward based on the displacement of the filling sleeve, while the spring is located between the filling sleeve and the insert seat, and the spray pipe passes upward sequentially from the filling sleeve, the spring and the correction channel.

[0015] According to another specific embodiment and preferred aspect of the present invention, the punching unit includes a base mounted on a cartridge seat, a punching power member that reciprocates linearly along the direction perpendicular to the cartridge seat, and a punching head, wherein the punching head corresponds between two annular channels, and the punching head can enter and exit the cartridge seat and the sleeve to punch the liquid spray tube horizontally.

[0016] In addition, multiple assembly stations are arranged side by side on the positioning platform. Each assembly station has a corresponding pressing head above the positioning platform, and the pressing head has a positioning groove that matches the nozzle body. Based on the alignment of the positioning groove, the pressing is more stable, thereby meeting the requirements of high-quality assembly.

[0017] In some specific embodiments, each spray tube insertion branch also has a cleaning cotton freely sleeved around the periphery of the spray tube. The cleaning cotton moves against the lower part of the calibration channel, allowing the spray tube and the cleaning cotton to move relative to each other for surface cleaning. The cleaning cotton removes residue or stains from the periphery of the spray tube, allowing a relatively clean spray tube to enter the calibration channel, improving calibration accuracy and insertion quality.

[0018] Due to the implementation of the above technical solutions, the present invention has the following advantages compared with the prior art: In the current process of inserting the spray tube into a sprayer, due to the inherent deformation and difficulty in repositioning of the spray tube, the cutting is based on the insertion point, which involves punching the insertion port. This punching process causes deformation of the spray tube insertion port. Once the deformation cannot be restored to its natural state (or the end cannot be corrected), it directly leads to difficulties in aligning and inserting the next nozzle body, easily resulting in incomplete insertion or even failure to insert at all. Furthermore, the insertion length of the spray tube extending to the outer periphery of the nozzle body is difficult to control; however, an excessively short insertion leads to a high probability of detachment, making it difficult to control the product yield. Simultaneously, in the conventional insertion process, due to the insertion... This causes the tube end to expand outwards and tighten against the inner wall of the insert. When the insert is completed, the falling process pulls on the spray tube, leading to insertion failure. Simultaneously, the inserting head cannot effectively straighten the spray tube, resulting in inconsistent cutting lengths and affecting product yield. Furthermore, the spray tubes used are generally coiled, making alignment difficult when the tube itself is compressed or deformed, resulting in very poor assembly and disassembly strain resistance. In addition, with a continuous supply of spray tubes, assembly of individual nozzles is typically performed, resulting in low assembly efficiency. Moreover, if the insertion is not performed at the maximum pressure position, the insertion process can damage the nozzle body components. The present invention cleverly solves the shortcomings of existing multi-station nozzle assembly processes, such as those involving assembly quality issues, based on the overall design of automatic nozzle replacement and shape correction. Using this assembly process, firstly, the nozzle body is positioned at the assembly station with the inlet end facing downwards. Each nozzle insertion branch, after correcting the shape of the nozzle through the correction channel, protrudes from the end of the correction channel to form an insertion section. Secondly, at the lower pressure limit position formed by each assembly station, each nozzle insertion branch moves upwards synchronously and is inserted into the nozzle through the disassembly part. Simultaneously, the top of the correction channel abuts against the lower diameter reduction end of the stepped part, and the insertion section deforms and fits into the stepped part. Finally, the nozzle body is positioned by the correction... The spray tube, fitted onto the nozzle body, is straightened as it falls downwards along the shaped channel until the falling length aligns with the punching position. At this point, the punching component performs a through-type horizontal punching to simultaneously complete the assembly of multiple nozzles. Simultaneously, the spray tube moves relative to the shaped channel to fill in the gaps and restore the preparation state of the spray tube insertion branch. Therefore, this invention, on the one hand, is based on the cooperation between the assembly station and the spray tube insertion branch, and on the other hand, is based on the shaping, resetting, and straightening of the shaped channel, while assembly is performed at the pressing limit position, to achieve the alignment and punching of multiple nozzles of equal length. This not only eliminates the defect of being unable to align and insert due to the deformation of the spray tube, but also provides the necessary conditions for high-quality insertion of the spray tube.On the other hand, based on the synchronous filling and shaping of the spray pipe, the length of the spray pipe protruding is matched with the length of the stepped section. This allows for proper insertion with the reinforcement of the sleeve insertion end. Not only are the insertion lengths consistent, but the spray pipe is also prevented from being pulled off when the insertion end falls back. Simultaneously, the provided downward pressure equals the upward force generated by the insertion, which includes the lifting force of the insertion and the upward reset force. This ensures that the installation does not cause misalignment of internal parts. Attached Figure Description

[0019] Figure 1 This is a front view schematic diagram of the automatic tube insertion and cutting integrated assembly machine for the sprayer of the present invention; Figure 2 This is a front view schematic diagram of the automatic tube insertion and cutting integrated assembly machine for the sprayer in step S1 of the present invention; Figure 3 This is a front view schematic diagram of the automatic tube insertion and cutting assembly machine for the sprayer in step S2 of the present invention; Figure 4 This is a front view schematic diagram of the automatic tube insertion and cutting integrated assembly machine for the sprayer in the straightened state in step S3 of the present invention; Figure 5 This is a front view schematic diagram of the automatic tube insertion and cutting integrated assembly machine of the sprayer in the replacement state of step S3 of the present invention; Figure 6 This is a front view schematic diagram of the automatic tube insertion and cutting integrated assembly machine of the sprayer after the replacement step S3 of the present invention. Figure 7 for Figure 6 A schematic diagram of a local structure in the image; Figure 8 for Figure 7 Enlarged cross-sectional view along the central AA direction; Wherein: W, sprayer; W1, nozzle body; t, stepped section; c, disassembly and assembly section; W2, spray pipe; 1, positioning unit; 10, positioning platform; 11, lower pressure head; 110, positioning groove; 2, insertion unit; Q, spray pipe insertion branch; X, alignment channel; Z, punching assembly; Z1, base; Z2, punching power component; Z3, punching cutter head; B, compensation assembly; b1, compensation sleeve; b2, power unit; b3, spring; 3, insertion seat; 4, power component; 5, insertion tube kit; 50, sleeve; m, insertion end; 51, ball bearing; N, cleaning cotton. Detailed Implementation

[0020] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0021] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the unit or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0022] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0023] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0024] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0025] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0026] like Figures 1 to 8 As shown, the multi-station nozzle assembly process based on automatic filling of the spray tube and shape correction in this embodiment is used for the assembly of nozzle W. Specifically, nozzle W includes nozzle body W1 and spray tube W2. The nozzle body W1 is a commonly used press nozzle assembly, and the spray tube W2 is a commonly used plastic tube. It is flexible and therefore difficult to recover its deformation after being deformed during punching or production.

[0027] In some specific embodiments, the assembly equipment used in the nozzle assembly process includes a positioning unit 1 for the nozzle body W1 and an insertion unit 2 for the spray pipe W2, wherein the liquid inlet end of the nozzle body W1 has a stepped portion t with a gradually decreasing outer diameter and a disassembly portion c extending downward from the bottom of the stepped portion t.

[0028] In this example, the positioning unit 1 has two aligned and spaced assembly stations (usually two nozzles per group, but there can also be three, four or more), and the insertion unit 2 has a spray pipe insertion branch Q corresponding to each assembly station, that is, there are two spray pipes W2 aligned and inserted.

[0029] Specifically, the positioning unit 1 includes a positioning platform 10 and a downward pressing head 11 located above the positioning platform 10 and capable of vertical movement. The downward pressing head 11 presses and positions the nozzle body W1 onto the positioning platform 10 to overcome the upward force caused by the insertion. The downward pressing force counteracts the upward force caused by the insertion; the downward force is greater than or equal to the upward force, thus maintaining the nozzle body W1 stationary during alignment and insertion. The upward force here includes the force of the insertion lifting and the upward pressing reset force, preventing misalignment of internal parts during installation. Furthermore, two assembly stations are arranged side-by-side on the positioning platform 10, and the downward pressing head 11 has a positioning groove 110 that matches the nozzle body W1. Alignment based on the positioning groove ensures more stable downward pressing, thereby meeting the requirements of high-quality assembly.

[0030] In some specific embodiments, the spray pipe insert branch Q has a correction channel X capable of multi-point limiting and contacting from the outer periphery to restore deformation, a punching component Z arranged perpendicular to the correction channel X, and a filling component B for the spray pipe, wherein the punching component Z crosses the correction channel X to perform horizontal punching, and the filling component B is used to fill the gaps in the spray pipe while it is being shaped upwards after cutting.

[0031] In this example, two alignment channels X are installed in parallel on the same insert seat 3 that can move up and down. Then, a power component 4 is used to drive the insert seat 3 to move up for insertion, move down for straightening, and perform alignment punching. The power component 4 used is a conventional transmission screw or telescopic rod drive.

[0032] Specifically, the alignment channel X is formed by a tube assembly 5 that penetrates the insert base 3 from top to bottom. The tube assembly 5 includes a sleeve 50 and multiple sets of freely rolling balls 51 formed on the inner wall of the sleeve 50. The multiple sets of balls 51 are spaced apart vertically, and each set of balls 51 is spaced apart around the circumference of the sleeve to form an annular channel that rolls against the outer circumference of the spray tube W2. The centers of the multiple annular channels are aligned, and the multiple annular channels form a alignment channel through which the spray tube passes. The spray tube W2, which is pushed out from bottom to top, is aligned based on the alignment channel and returns to its original position after contact with the outer circumference, and then protrudes from the top of the sleeve. The length of the protrusion is equal to the length of the stepped portion t. The sleeve 50 penetrates the insert base 3 and protrudes from both the upper and lower ends, wherein the upper end forms the insert end m, and the insert end m is wrapped around the disassembly part during alignment insertion; and / or, during alignment insertion, the insert end m is located below the variable diameter end of the stepped portion. Based on the design of the insert end, it not only works with the ball bearings for shape correction but also strengthens the protruding end of the sleeve to assist in insertion. Simultaneously, the resulting insertion position further improves the quality of insertion (e.g., proper insertion), and reduces the probability of detachment or loosening by not pulling on the spray tube during retraction. Each pair of adjacent sets of ball bearings 51 are staggered vertically. This results in strong correction capability, facilitating rapid repositioning of the deformed spray tube. Multiple sets of ball bearings 51 are progressively staggered from top to bottom. This provides comprehensive correction, ensuring the protruding part is in the optimal assembly state. In the axial projection of the insert assembly 5, the contacts formed by multiple sets of ball bearings 51 are spaced apart around the center of the sleeve; or, in the axial projection of the insert assembly 5, multiple contacts are connected to form a ring matching the outer diameter of the spray tube. In other words, the contacts are formed by the contact points of the ball bearings, and regardless of their distribution, they are always on a circular trajectory, thus implementing a more comprehensive circumferential compression correction of the spray tube.

[0033] The alignment component B includes a power component b1 for vertical movement, an alignment sleeve b2, and a spring b3. The spray pipe W2 passes through the alignment sleeve b2 into the alignment channel, and is aligned upwards based on the displacement of the alignment sleeve b2. Simultaneously, the spring b3 is located between the alignment sleeve b2 and the insert seat 3, and the spray pipe W2 sequentially exits upwards from the alignment sleeve b2, the spring b3, and the alignment channel. Specifically, a contact group is also provided inside the alignment sleeve b2 to improve the smoothness of the alignment process.

[0034] In addition, each spray tube insertion branch Q also has a cleaning cotton N that is freely fitted around the outer periphery of the spray tube W2. The cleaning cotton N moves against the lower part of the calibration channel X, allowing the spray tube W and the cleaning cotton N to move relative to each other for surface cleaning. The cleaning cotton N removes residues or stains from the outer periphery of the spray tube W2, allowing the relatively clean spray tube W2 to enter the calibration channel X, improving calibration accuracy and insertion quality.

[0035] The punching unit Z includes a base Z1 mounted on the insert 3, a punching power component Z2 that reciprocates linearly along the direction perpendicular to the insert 3, and a punching head Z3. The punching head Z3 corresponds to the space between two annular channels (contact groups), and the punching head Z3 can move in and out of the insert 3 and the sleeve 50 to horizontally punch the liquid spray tube W2 inside the tube. Then, there are at least two contact groups located above the punching point. Multiple groups form a clamp to optimize the correction effect, enhance the deformation resistance of the liquid spray tube, and provide the necessary conditions for high-quality inserting.

[0036] In summary, the implementation process of this embodiment is as follows: S1. Insertion Preparation The nozzle body is positioned at the assembly station with the liquid inlet end facing downwards. Each spray pipe insertion branch is corrected in shape based on the calibration channel and then protrudes from the end of the calibration channel to form an insertion pipe section. S2, Alignment Insertion At the lower pressure limit position formed by each assembly station, each injection pipe insert branch moves upward synchronously and is inserted into the injection pipe by the disassembly and assembly part. At the same time, the top of the calibration channel abuts against the lower diameter end of the step part, and the insert pipe section deforms and is fitted into the step part. S3, Straighten, Punch, Fill in the gap The spray tube, fitted onto the nozzle body, is straightened as it falls downwards from one side of the calibration channel until the falling length aligns with the punching position. Then, the punching component performs a through-type horizontal punching to simultaneously complete the assembly of multiple nozzles. At the same time, the spray tube moves relative to the calibration channel to fill in the gaps and restore the spray tube insertion branch to the material preparation state in step S1.

[0037] In step S1, the applied downward pressure is equal to the upward force generated by the insert. This upward force includes the lifting force of the insert and the pressing upward reset force, ensuring that the installation does not cause misalignment of internal parts. In step S1, the length of the insert section is equal to the length of the stepped section, resulting in a uniform length of the assembled parts, meeting basic usage requirements. In step S2, the disassembly part is inserted into the inner wall of the spray tube from the outer periphery. This creates a more secure fit (in short, a conventional interference fit), facilitating straightening of the spray tube during the retraction process. During the punching process in step S3, the punching point is located between two contact groups to avoid interference from the contacts and to achieve high-quality horizontal punching under positioning support. In the spray tube replacement process in step S3, the spray tube is pushed upward relative to the alignment channel from bottom to top, and during the movement, the insert section emerges after being shaped by the contacts. That is, shaping and replacement occur simultaneously.

[0038] Furthermore, after adopting this assembly process, firstly, the nozzle body is positioned at the assembly station with the liquid inlet end facing downwards. Each spray pipe insertion branch, based on the calibration channel, corrects the shape of the spray pipe and protrudes from the end of the calibration channel to form an insertion section. Secondly, at the lower pressure limit position formed at each assembly station, each spray pipe insertion branch moves upwards synchronously and is inserted into the spray pipe by the disassembly / assembly part. Simultaneously, the top of the calibration channel abuts against the lower diameter reduction end of the stepped part, and the insertion section deforms externally and fits into the stepped part. Finally, from one side of the calibration channel towards… The spray tube, fitted onto the nozzle body, is straightened as it falls back down until the falling length aligns with the punching position. At this point, the punching component performs a through-cut horizontal cut to simultaneously assemble multiple nozzles. Simultaneously, the spray tube is moved relative to the alignment channel to restore the spray tube insertion branch to its prepared state. Therefore, this invention, on the one hand, relies on the collaboration between the assembly station and the spray tube insertion branch, and on the straightening and repositioning by the alignment channel, while simultaneously assembling at the pressing limit position, to achieve the aligned insertion and punching of multiple nozzles of equal length. This not only eliminates the defect of misalignment during insertion due to nozzle deformation, but also provides the necessary conditions for high-quality nozzle insertion. Furthermore, based on the synchronous alignment and shaping of the nozzle, the protruding length of the nozzle matches the length of the stepped section, thus enabling alignment insertion with the reinforcement assistance of the sleeve insertion end. This ensures not only consistent insertion lengths but also prevents the nozzle from being pulled off when the insertion end falls back. Thirdly, the downward pressure provided is equal to the upward force generated by the insertion, which includes the lifting force of the insertion and the upward restoring force. This installation method prevents misalignment of internal parts. Fourthly, multiple assembly stations are arranged side-by-side on the positioning platform. Each assembly station has a corresponding pressing head above the positioning platform, and the pressing head has a positioning groove that matches the nozzle body. Based on the alignment of the positioning groove, the pressing is more stable, thus meeting the needs of high-quality assembly. Fifthly, the length of the insert tube section is equal to the length of the stepped section, so that the length of the resulting set is uniform and meets the basic needs of use. The disassembly part is inserted into the inner wall of the spray tube from the outer periphery. This results in a more secure connection (in short, a conventional interference fit), which facilitates straightening of the spray tube during the retraction process. Sixthly, the deformation is relatively shaped by the contact of the outer periphery, so that the spray tube can restore its deformation. In the axial projection of the calibration channel, the contacts formed by multiple contact groups are arranged relatively separately on the circular trajectory, or the contacts formed by multiple contact groups are connected to form a ring that matches the outer diameter of the spray tube.Regardless of the contact point distribution, they will always be on a circular trajectory. This allows for more comprehensive self-circumferential compression correction of the spray pipe. Simultaneously, the rolling of the universal rollers reduces obstruction to the spray pipe, facilitating smoother pipe alignment and straightening. Seventhly, the punching point is located between two contact groups to avoid interference from the contacts. Furthermore, high-quality horizontal punching can be achieved with positioning support. At least two contact groups are located above the punching point, forming a clamping mechanism to optimize the correction effect. This also enhances the spray pipe's resistance to deformation and ensures high-quality insertion. The system provides the necessary conditions; the eighth aspect is based on the upward movement of the spray tube relative to the calibration channel, and during the movement, the tube segment emerges after being shaped by the contact points, that is, shaping and filling at the same time; the ninth aspect is that the spray tube enters the calibration channel from the filling sleeve, and the spray tube is filled upward based on the displacement of the filling sleeve, and a contact group is also provided inside the filling sleeve to improve the smoothness of filling; the tenth aspect is based on the removal of residues or stains on the outer periphery of the spray tube by cleaning cotton, so that the relatively clean spray tube enters the calibration channel, improving the calibration accuracy and improving the insertion quality.

[0039] The present invention has been described in detail above, with the aim of enabling those skilled in the art to understand and implement the invention. However, this description should not be construed as limiting the scope of protection of the invention. All equivalent changes or modifications made in accordance with the spirit and essence of the invention should be included within the scope of protection of the invention.

Claims

1. A spray pipe insertion unit for a multi-station nozzle assembly device, the assembly device comprising a nozzle body positioning unit and a spray pipe insertion unit, wherein the liquid inlet end of the nozzle body has a stepped portion with a gradually decreasing outer diameter and a disassembly / assembly portion extending downward from the bottom of the stepped portion, characterized in that: The positioning unit has multiple aligned and spaced assembly stations. The spray pipe insertion unit has spray pipe insertion branches corresponding to each assembly station. Each spray pipe insertion branch has a correction channel that can perform multi-point limiting contact from the outer periphery to restore deformation, a punching component set perpendicular to the correction channel, and a spray pipe replacement component. Each correction channel is composed of multiple contact groups aligned vertically at the center. Each contact group is formed by multiple circumferentially spaced contacts. The contacts formed between two adjacent contact groups are staggered vertically. The punching component performs horizontal punching across the correction channel. The replacement component is used to shape and replace the spray pipe upwards after cutting. When the lower pressure limit position formed by each assembly station is reached, each spray pipe insertion branch moves upwards synchronously and is inserted into the spray pipe by the disassembly part. At the same time, the top of the correction channel abuts against the lower diameter end of the stepped part, and the insertion pipe section deforms and is fitted into the stepped part. The downward pressure provided is equal to the upward force formed by the insertion. Each calibration channel is formed by a tube assembly that runs through the upper and lower insert bases. The calibration channels are installed in parallel on the same insert base that can move up and down. A power component drives the insert base to move up for insertion, move down for straightening, and perform alignment punching. The power component is driven by a transmission screw or telescopic rod. The liquid spray tube fitted on the nozzle body is straightened as one side of the calibration channel falls down until the falling length is aligned with the punching position. Then, the punching component performs a through-type horizontal punching to simultaneously complete the assembly of multiple nozzles. At the same time, the liquid spray tube moves relative to the calibration channel to fill in the gaps and restore the liquid spray tube insert branch to the ready state.

2. The spray pipe insertion unit of the multi-station nozzle assembly equipment according to claim 1, characterized in that: The cannulation kit includes a cannula and multiple sets of freely rolling balls formed on the inner wall of the cannula. The multiple sets of balls are spaced apart vertically, and each set of balls is spaced apart around the circumference of the cannula to form an annular channel that rolls and abuts against the outer circumference of the spray tube.

3. The spray pipe insertion unit of the multi-station nozzle assembly equipment according to claim 2, characterized in that: The centers of multiple annular channels are aligned, and the multiple annular channels form a calibration channel through which the spray pipe passes.

4. The spray pipe insertion unit of the multi-station nozzle assembly equipment according to claim 3, characterized in that: The spray pipe, which is ejected from the bottom up, is aligned with the outer periphery of the alignment channel to restore its deformation and then emerges from the top of the sleeve, with the length of the emerging part being equal to the length of the stepped section.

5. The spray pipe insertion unit of the multi-station nozzle assembly equipment according to claim 2, characterized in that: The sleeve passes through the insertion seat and protrudes from both the upper and lower ends, with the upper end forming the insertion end, which wraps around the disassembly part during alignment and insertion.

6. The spray pipe insertion unit of the multi-station nozzle assembly equipment according to claim 2, characterized in that: The sleeve passes through the insert and protrudes from both the upper and lower ends, with the upper end forming the insert end. During alignment and insertion, the insert end is located below the variable diameter end of the stepped section.

7. The spray pipe insertion unit of the multi-station nozzle assembly equipment according to claim 2, characterized in that: Each pair of adjacent sets of balls is arranged with their balls staggered vertically.

8. The spray pipe insertion unit of the multi-station nozzle assembly equipment according to claim 2, characterized in that: In the axial projection of the insertion kit, the contacts formed by multiple sets of balls are distributed at intervals around the center of the sleeve.

9. The spray pipe insertion unit of the multi-station nozzle assembly equipment according to claim 2, characterized in that: In the axial projection of the cannulation kit, multiple contacts are connected to form a ring that matches the outer diameter of the injection tube.

10. The spray pipe insertion unit of the multi-station nozzle assembly equipment according to claim 1, characterized in that: The positioning assembly includes a power component for vertical movement, a positioning sleeve, and a spring. The spray pipe passes through the alignment channel from inside the positioning sleeve and is positioned upwards based on the displacement of the positioning sleeve. Meanwhile, the spring is located between the positioning sleeve and the insert seat, and the spray pipe passes upwards sequentially from the positioning sleeve, the spring, and the alignment channel.

11. The spray pipe insertion unit of the multi-station nozzle assembly equipment according to claim 1, characterized in that: The punching unit includes a base mounted on the cartridge seat, a punching power component that reciprocates linearly along the direction perpendicular to the cartridge seat, and a punching head, wherein the punching head corresponds between two annular channels, and the punching head can enter and exit the cartridge seat and the sleeve to punch the liquid spray tube inside the sleeve horizontally.

12. The spray pipe insertion unit of the multi-station nozzle assembly equipment according to claim 1, characterized in that: Multiple assembly stations are arranged side by side on the positioning platform. Each assembly station has a corresponding pressing head above the positioning platform, and the pressing head has a positioning groove that matches the nozzle body.

13. The spray pipe insertion unit of the multi-station nozzle assembly equipment according to claim 1, characterized in that: Each spray tube insert branch also has a cleaning cotton that is freely fitted around the outside of the spray tube. The cleaning cotton moves against the bottom of the alignment channel so that the spray tube and the cleaning cotton move relative to each other to remove dirt and clean the surface.

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