Adopting electromagnetic drive point glue jet valve

Abstract

The application discloses a point glue injection valve driven by an electromagnetic drive, and relates to the technical field of precise point glue injection. The point glue injection valve comprises a shell, a top adjusting assembly, a bottom adjusting assembly, an electromagnetic drive assembly and a ram assembly. The shell comprises a top plate, a partition plate and a bottom plate. The top adjusting assembly is screwed into a first threaded hole of the top plate. The bottom adjusting assembly is screwed into a second threaded hole of the partition plate. The bottom adjusting adjusting assembly comprises a bottom adjusting sleeve and a first spring fixedly arranged in the bottom adjusting sleeve. The electromagnetic drive assembly is arranged between the top plate and the partition plate. One end of the ram assembly is rigidly connected with a moving part of the electromagnetic drive assembly, the other end of the ram assembly passes through the bottom adjusting assembly and the bottom plate, and the other end of the ram assembly is aligned with a glue injection nozzle of a valve seat below the bottom plate. The ram assembly comprises a first clamping assembly, and the lower end of the first clamping assembly is clamped with the upper end of the first spring. The top adjusting assembly, the bottom adjusting assembly, the electromagnetic drive assembly, the ram assembly and the glue injection nozzle are coaxially arranged. The point glue injection valve has the advantages of simple structure, easy adjustment and assembly, linear reciprocating movement of the ram assembly and optimized point glue injection consistency.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of precision dispensing technology, in particular to a dispensing jet valve driven by electromagnetism. BACKGROUND

[0002] The piezoelectric sensing element (hereinafter referred to as piezoelectric element) made of piezoelectric ceramic material by special process is widely used in the field of precision dispensing due to its excellent piezoelectric effect performance. The jet dispensing valve (hereinafter referred to as piezoelectric valve) with piezoelectric element as the core functional part is the most commonly used dispensing valve in the field of precision dispensing. From the operation mechanism, the existing piezoelectric valve converts the micro deformation generated by piezoelectric effect into valve opening and closing action through intermediate amplification link. Therefore, the core structure of the existing piezoelectric valve has three parts: ① piezoelectric element; ② high-frequency reciprocating movement of upper and lower parts to realize high-frequency opening and closing of glue nozzle, and then complete the precise glue spraying action; ③ amplification lever that amplifies the high-frequency micro deformation of piezoelectric element by a certain ratio and synchronously transmits it to the striker rod, so that the striker rod moves in high frequency within the ideal stroke range under the combined action of point pressure and spring rebound force.

[0003] Due to the addition of intermediate structure links such as amplification lever, the valve body structure of the existing piezoelectric valve is relatively complex, and the assembly and debugging of the valve body are relatively difficult; the piezoelectric element and the striker rod in the existing piezoelectric valve respectively act on the near fulcrum end and the far fulcrum end of the amplification lever, and the amplification lever actually moves around the fulcrum arc under the action of the resultant moment, which has certain adverse effects on the vertical up-down movement of the striker rod; and the service life of piezoelectric ceramic is relatively short, and in application, the piezoelectric stack will cause the stroke to be shortened or unable to output the stroke due to the damage of piezoelectric ceramic. SUMMARY

[0004] In order to solve the problems in the prior art, the present application provides a dispensing jet valve driven by electromagnetism, which comprises:

[0005] A shell comprising a top plate, a partition plate and a bottom plate; a first threaded hole is arranged on the top plate, a second threaded hole is arranged on the partition plate, and a valve seat is connected below the bottom plate;

[0006] A top adjusting assembly screwed in the first threaded hole;

[0007] A bottom adjusting assembly screwed in the second threaded hole, the bottom adjusting assembly comprising a bottom adjusting sleeve and a first spring fixedly arranged in the bottom adjusting sleeve;

[0008] An electromagnetic drive assembly, comprising a housing fixedly arranged in a receiving space between the top plate and the partition plate, and a moving part arranged in a cavity of the housing, the moving part vertically upwardly or downwardly displaces under the action of an external force;

[0009] A ram assembly, one end of which is rigidly connected with the moving part of the electromagnetic drive assembly, and the other end of which passes through the bottom adjusting assembly and the bottom plate and is aligned with the glue nozzle on the valve seat; the ram assembly comprises a first clamping assembly, the lower end of which is clamped with the upper end of the first spring;

[0010] The top adjusting assembly, the bottom adjusting assembly, the electromagnetic drive assembly, the ram assembly and the glue nozzle are coaxially arranged;

[0011] Under the energized state, the moving part of the electromagnetic drive assembly vertically downwardly displaces under the action of a vertical downward force, synchronously driving the ram assembly to move downward to contact the glue nozzle, and the first spring accumulates elastic force; under the de-energized state, the first spring releases the elastic force, the moving part of the electromagnetic drive assembly moves upward, so that the moving part of the electromagnetic drive assembly contacts the top of the cavity of the housing, and the ram assembly moves away from the glue nozzle.

[0012] In an embodiment, the size of the elastic force accumulated by the first spring and / or the length of the ram assembly extending out of the housing is achieved by adjusting the distance between the bottom adjusting assembly and the top adjusting assembly; the closer the distance between the bottom adjusting assembly and the top adjusting assembly, the greater the elastic force accumulated by the first spring.

[0013] In an embodiment, the ram assembly comprises a head ram and a tail ram;

[0014] The first end of the tail ram is rigidly connected with the moving part of the electromagnetic drive assembly, and the second end thereof is fixedly contacted with the first end of the head ram through a fixing assembly; the second end of the head ram passes through the bottom adjusting assembly and the bottom plate and is aligned with the glue nozzle on the valve seat.

[0015] In an embodiment, the first clamping assembly is arranged on the tail ram, and the head ram further comprises a second clamping assembly;

[0016] The fixing assembly comprises:

[0017] A ram guide sleeve screwed into a third threaded hole on the bottom plate;

[0018] A second spring sleeved in the ram guide sleeve, and the lower end of the second spring is clamped with the ram guide sleeve;

[0019] The second end of the head impact rod passes through the second spring and the impact rod guide sleeve, and the lower end of the second clamping assembly is clamped with the upper end of the second spring, and the second spring accumulates elastic force; the head impact rod and the tail impact rod are in contact and fixed under the action of the elastic force of the second spring.

[0020] In an embodiment, the second end of the tail impact rod is a spherical surface.

[0021] The first end of the head impact rod is a concave surface matched with the spherical surface.

[0022] In an embodiment, the size of the elastic force accumulated by the second spring is achieved by adjusting the distance between the impact rod guide sleeve and the top adjusting assembly; the closer the distance between the impact rod guide sleeve and the top adjusting assembly, the greater the elastic force accumulated by the second spring.

[0023] In an embodiment, the point injection jet valve driven by the electromagnetic drive further comprises:

[0024] A shock pad is arranged on the top of the electromagnetic drive assembly, and is used to reduce the impact force between the rebounding movement part of the electromagnetic drive assembly and the top of the inner cavity of the shell of the electromagnetic drive assembly under the action of the elastic force of the first spring.

[0025] In an embodiment, the point injection jet valve driven by the electromagnetic drive further comprises:

[0026] A magnetic isolation pad is arranged between the impact rod assembly and the movement part of the electromagnetic drive assembly.

[0027] In an embodiment, the point injection jet valve driven by the electromagnetic drive further comprises:

[0028] A sealing pad is arranged on the bottom of the shell and is sleeved on the impact rod assembly.

[0029] In an embodiment, the valve seat comprises:

[0030] A glue supply assembly interface is used to connect a glue supply assembly.

[0031] A glue flow channel, one end of which is in communication with the glue injection nozzle, and the other end of which is connected with the glue supply assembly interface.

[0032] The point injection jet valve driven by the electromagnetic element of the present application adopts the electromagnetic element as the driving source, and directly controls the action of the valve body ram with the driving source, realizes the regularity of the point injection valve assembly and debugging process, that is, without any special method or complex process, the valve body can be adjusted and assembled by the conventional assembly and debugging method, which is very beneficial to mass production; at the same time, the electromagnetic element directly drives the linear action of the ram, realizes the ideal mode of the vertical linear reciprocating motion of the valve body ram, eliminates the adverse factors causing the non-vertical motion of the ram, and greatly optimizes the point injection consistency. BRIEF DESCRIPTION OF DRAWINGS

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor. In the drawings:

[0034] Figure 1 A schematic diagram of the point injection jet valve driven by the electromagnetic element of the present application is provided.

[0035] Figure 2 A schematic diagram of the ram assembly of the present application is provided.

[0036] Figure 3 Another schematic diagram of the point injection jet valve driven by the electromagnetic element of the present application is provided.

[0037] Figure 4 An assembly schematic diagram of the point injection jet valve driven by the electromagnetic element of the present application is provided. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical solutions and advantages of the embodiments of the present application more clear, the embodiments of the present application will be further described in detail below with reference to the drawings. Here, the schematic embodiments of the present application and their descriptions are used to explain the present application, but not as a limitation of the present application.

[0039] The present application provides a point injection jet valve driven by an electromagnetic element, as shown in Figure 1 The point injection jet valve driven by the electromagnetic element of the present application comprises:

[0040] The shell 1 comprises a top plate 11, a partition plate 12 and a bottom plate 13; the first threaded hole 14 is arranged on the top plate 11, the second threaded hole 15 is arranged on the partition plate 12, and the valve seat 2 is connected below the bottom plate 13; the valve seat 2 comprises a glue supply assembly interface 22 connected with the glue supply assembly 10, a glue passage 23 and a glue outlet nozzle 21, the glue flows out from the glue supply assembly 10, passes through the glue passage 23 and the glue outlet nozzle 21, and flows out of the point injection jet valve;

[0041] a top adjusting assembly 3 screwed into the first threaded hole 14;

[0042] a bottom adjusting assembly 4 screwed into the second threaded hole 15, the bottom adjusting assembly 4 comprising a bottom adjusting sleeve 41 and a first spring 42 fixedly arranged in the bottom adjusting sleeve;

[0043] an electromagnetic driving assembly 5 arranged in a containing space between the top plate 11 and the partition plate 12, the electromagnetic driving assembly 5 comprising a moving part 51 and a housing 52. The housing 52 is fixed in the containing space, for example, by a fixing structure (not shown in the figure) such as a cover plate arranged in the containing space. The moving part 51 is arranged in the inner cavity of the housing 52 and can move up and down in the vertical direction under the action of external force. The moving part 51 is a moving iron core. When the electromagnetic driving assembly is in the energized state, the moving part 51 will produce a vertical downward displacement under the action of electromagnetic force. When the electromagnetic driving assembly is in the de-energized state, the electromagnetic force disappears.

[0044] a striker assembly 6, one end of which is rigidly connected with the moving part 51 of the electromagnetic driving assembly, and the other end of which passes through the bottom adjusting assembly 4 and the bottom plate 13 and extends into the glue flow channel 23 in the valve seat 2 to align with the glue outlet nozzle 21. The striker assembly 6 can be rigidly connected with the moving part 51 of the electromagnetic driving assembly by means of screwing, clamping or the like, which is not limited here. The striker assembly 6 comprises a first clamping assembly 61 integrally formed with the striker assembly 6, the lower end of the first clamping assembly 61 being clamped with the upper end of the first spring 42. When the electromagnetic driving assembly is in the de-energized state, the first spring 42 is in the state of accumulating the first elastic force.

[0045] The top adjusting assembly 3, the bottom adjusting assembly 4, the electromagnetic driving assembly 5, the striker assembly 6 and the glue outlet nozzle 21 are coaxially arranged.

[0046] When the electromagnetic driving assembly is in the energized state, the moving part 51 of the electromagnetic driving assembly is subjected to a vertical downward force and produces a vertical downward displacement, synchronously driving the striker assembly 6 to move downward to contact the glue outlet nozzle 21, while the first spring 42 accumulates elastic force. When the electromagnetic driving assembly is in the de-energized state, the first spring 42 releases the elastic force, the moving part 51 of the electromagnetic driving assembly moves upward, so that the moving part 51 of the electromagnetic driving assembly contacts the top of the inner cavity of the housing 52, and the striker assembly 6 moves away from the glue outlet nozzle 21.

[0047] Specifically, in the power-off state, the moving part 51 of the electromagnetic drive assembly 5 is in the initial position with the striker assembly 6, i.e., the moving part 51 of the electromagnetic drive assembly is in contact with the top of the inner cavity of the shell 52, the moving part 51 of the electromagnetic drive assembly 5 is rigidly connected with the striker assembly 6, and the striker assembly 6 is subjected to the first elastic force of the first spring 42 upwardly, so that in the power-off state, the working state of the glue injection jet valve driven by the electromagnetic drive of the application is that the moving part 51 of the electromagnetic drive assembly 5 and the striker assembly 6 are balanced between the first spring 42 and the top of the inner cavity of the shell 52 under the action of the first spring 42, at this time, the striker assembly 6 is not in contact with the glue injection nozzle 21, the outlet of the glue injection nozzle is in an open state, and the glue injection can be normal.

[0048] In the instant of power-on, the moving part 51 of the electromagnetic drive assembly 5 moves vertically downward in a straight line under the action of the electromagnetic force generated in the instant of power-on, and the moving part 51 is separated from the top of the inner cavity of the shell 52; the moving part 51 synchronously drives the striker assembly 6 to move downward against the elastic force of the first spring 42, until the lower end of the striker assembly 6 is in contact with the glue injection nozzle 21, at this time, the outlet of the glue injection nozzle is cut off to form a closed valve state due to the mutual extrusion of the lower end of the striker assembly 6 and the glue injection nozzle 21, and the glue injection cannot be performed. When the moving part 51 of the electromagnetic drive assembly 5 drives the striker assembly 6 to move downward, the striker assembly 6 compresses the first spring 42 downwardly, and the first spring 42 further accumulates the second elastic force, i.e., the elastic force value of the second spring 42 at this time is the sum of the first elastic force and the second elastic force.

[0049] In the instant of power-off, the electromagnetic force disappears synchronously, at this time, the moving part 51 of the electromagnetic drive assembly 5 and the striker assembly 6 are only subjected to the elastic force of the first spring 42 upwardly, and the elastic force value is the sum of the first elastic force and the second elastic force. Under the action of the elastic force of the first spring 42, the moving part 51 of the electromagnetic drive assembly 5 and the striker assembly 6 synchronously and rapidly move upwardly until the top of the moving part 51 is again in contact with the top of the inner cavity of the shell 52, and returns to the initial position in the power-off state. At this time, the lower end of the striker assembly 6 is not in contact with the glue injection nozzle 21, the outlet of the glue injection nozzle is opened, and the glue injection can be normal. The elastic force value of the second spring 42 also returns to the first elastic force, and under the joint action of the top of the inner cavity of the shell 52, the moving part 51 and the striker assembly 6 return to the balanced state.

[0050] When the glue injection jet valve driven by the electromagnetic drive of the application is used for glue injection, only the operation of repeatedly performing power-on, power-off, power-on, power-off, and the like at a predetermined frequency is needed to control the electromagnetic drive assembly 5, so that the striker assembly 6 repeatedly performs high-frequency straight-line reciprocating motion upwardly and downwardly, and the outlet of the glue injection nozzle switches between the open state and the cut-off state, thereby realizing the function of jet glue injection.

[0051] The point injection jet valve of the present application adopts an electromagnetic element as a driving source, the moving part of the electromagnetic driving assembly is directly rigidly connected with the ram assembly, the driving source directly controls the action of the valve body ram, and the spring mechanism is arranged to ensure that the ram assembly and the moving part of the electromagnetic driving assembly produce synchronous rapid response, so that the point injection valve assembly and debugging process is regularized, that is, any special method or complex process is not required, and the valve body can be adjusted and assembled by using a conventional assembly and debugging method, which is very beneficial to mass production. Meanwhile, the electromagnetic driving assembly directly drives the linear action of the ram assembly, so that the ideal mode of the vertical linear reciprocating motion of the valve body ram is realized, and the adverse factors causing the non-vertical motion of the ram are eliminated, so that the point injection consistency is greatly optimized.

[0052] In an embodiment, the size of the elastic force accumulated by the first spring and / or the length of the ram assembly extending out of the housing is achieved by adjusting the distance between the bottom adjusting assembly and the top adjusting assembly; the closer the distance between the bottom adjusting assembly and the top adjusting assembly, the greater the elastic force accumulated by the first spring.

[0053] For example, please refer to Figure 1 A distance δ is marked between the partition 12 and the electromagnetic driving assembly 5, and under the de-energized state, the moving part 51 of the electromagnetic driving assembly and the ram assembly 6 are in force balance under the joint action of the first spring 42 of the top adjusting assembly 3 and the bottom adjusting assembly 4. From Figure 1 It can be seen that the smaller the distance δ, the greater the first elastic force accumulated by the first spring 42. Therefore, by adjusting the distance between the top adjusting assembly 3 and the bottom adjusting assembly 4, or in other words, by adjusting the relative position of the bottom adjusting assembly 4 and the ram assembly 6, the distance δ can be adjusted, and the size of the first elastic force accumulated by the first spring can be adjusted. The first elastic force is used to maintain the force balance state, i.e. the stable state, of the moving part 51 of the electromagnetic driving assembly and the ram assembly 6 under the de-energized state and the downward action of the top adjusting assembly 3, so that the moving part 51 of the electromagnetic driving assembly and the ram assembly 6 are kept in the initial position.

[0054] Similarly, since the moving part 51 of the electromagnetic driving assembly and the ram assembly 6 are rigidly connected, the relative position of the moving part 51 and the ram assembly 6 is fixed, so that the position of the electromagnetic driving assembly 5 and the ram assembly 6 relative to the housing 1 can be adjusted by adjusting the position of the top adjusting assembly 3 and the bottom adjusting assembly 4, and the length L (see Figure 4 ) of the ram assembly 6 extending out of the housing 1 can be adjusted.

[0055] The adjustment of the size of the elastic force accumulated by the first spring 42 and / or the length of the extension of the striker assembly 6 out of the housing 1 in the present embodiment mainly refers to the adjustment of the first elastic force of the first spring 42 and the adjustment of the length of the extension of the striker assembly 6 out of the housing 1 when the moving part 51 of the electromagnetic drive assembly 5 and the striker assembly 6 are in the initial position.

[0056] In an embodiment, as shown in Figure 2 and Figure 3 The striker assembly 6 includes a head striker 63 and a tail striker 62.

[0057] The first end of the tail striker 62 is rigidly connected with the moving part 51 of the electromagnetic drive assembly, specifically, the tail striker 62 is rigidly bound with the moving part 51 of the electromagnetic drive assembly through the threaded hole in the center of the magnetic isolation pad 7 by screwing and fastening; the second end of the tail striker 62 is fixedly contacted with the first end of the head striker 63 through a fixing assembly; the second end of the head striker 63 passes through the first spring 42 in the bottom adjustment assembly 4 and the bottom plate 13 of the housing 1, and is aligned with the glue nozzle 21 on the valve seat.

[0058] The first clamping assembly 61 is arranged on the tail striker 62, and the second clamping assembly 64 is further included on the head striker 63.

[0059] The fixing assembly includes:

[0060] The striker guide sleeve 65 (see Figure 3 ) is tightly screwed and fixed in the third threaded hole on the bottom plate 13, and is sleeved on the head striker 63; the inner hole wall of the striker guide sleeve 65 is tightly combined with the head striker 63, and forms a precise radial limiting action on the head striker 63;

[0061] The second spring 66 is sleeved in the striker guide sleeve 65, and the lower end of the second spring 66 is clamped with the striker guide sleeve 65; the striker guide sleeve 65 tightly presses the second spring 66 upward, fully pre-presses the second spring 66, and then makes the second spring 66 generate sufficient rebound force to maintain the point contact state and synchronous action of the head striker 63 and the tail striker 62;

[0062] The second end of the head striker 63 passes through the second spring 66 and the striker guide sleeve 65, and the lower end of the second clamping assembly 64 is clamped with the upper end of the second spring 66. The second spring 66 accumulates elastic force, and in the power-off state, when the moving part 51 of the electromagnetic drive assembly and the striker assembly 6 are in the initial position, the head striker 63 and the tail striker 62 are tightly contacted and fixed under the action of the elastic force accumulated by the second spring 66.

[0063] At this time, the head impact rod 63 is subjected to the vertical upward rebound force of the second spring 66 and the vertical downward pressure of the tail impact rod 62, and the head impact rod 63 is stationary relative to the tail impact rod 62 and keeps a state of synchronous vertical up-and-down movement with the tail impact rod 62.

[0064] In the energized state, under the action of the vertical downward electromagnetic force, the electromagnetic drive assembly moving part 51, the tail impact rod 62 rigidly connected with the electromagnetic drive assembly 5, and the head impact rod 63 connected with the tail impact rod 62 are synchronously moved downward to the point where the lower end of the head impact rod 63 contacts the glue-discharging nozzle, thereby blocking the glue discharge, and the second spring 66 is compressed downward, so that the second spring 66 further accumulates elastic force; in the instant of de-energization, the electromagnetic force is eliminated, and under the action of the rebound force of the first spring 42, the electromagnetic drive assembly moving part 51 and the tail impact rod 62 are synchronously moved upward to the initial position, and at the same time, under the action of the rebound force of the second spring 66, the head impact rod 63 is tightly attached to the tail impact rod 62 and is synchronously moved upward, and the lower end of the head impact rod 63 is away from the glue-discharging nozzle, so that the glue can be normally discharged.

[0065] In order to strengthen the connection between the head impact rod 63 and the tail impact rod 62, in an embodiment, the second end (the end in contact with the head impact rod 63) of the tail impact rod 62 is a spherical surface, and the first end (the end in contact with the tail impact rod 62) of the head impact rod 63 is an inner concave surface matched with the spherical surface. Such a structure can make the head impact rod 63 and the tail impact rod 62 in a state of close contact, i.e., point contact.

[0066] In an embodiment, the size of the elastic force accumulated by the second spring 66 is achieved by adjusting the distance between the impact rod guide sleeve 65 and the top adjusting assembly 3. Figure 3 It can be seen that the second spring 66 is arranged between the second clamping assembly 64 and the impact rod guide sleeve 65, and the smaller the distance between the second clamping assembly 64 and the impact rod guide sleeve 65, the shorter the compression of the second spring 66, and the greater the elastic force accumulated by the second spring 66. Therefore, by adjusting the distance between the impact rod guide sleeve 65 and the top adjusting assembly 3, the distance between the second clamping assembly 64 and the impact rod guide sleeve 65 can be adjusted, and the size of the elastic force accumulated by the second spring 66 can be achieved. In the de-energized state, when the electromagnetic drive assembly moving part 51 and the impact rod assembly 6 are in the initial position, the size of the elastic force accumulated by the second spring 66 (hereinafter referred to as the initial elastic force of the second spring) should satisfy the condition that the head impact rod 63 and the tail impact rod 62 are tightly attached.

[0067] The adjustment of the elastic force accumulated by the second spring 66 in the embodiment mainly refers to the adjustment of the initial elastic force of the second spring 66.

[0068] In an embodiment, as shown in Figure 3 the electromagnetic drive point glue injection valve further comprises:

[0069] A shock pad 9 is arranged on the top of the electromagnetic driving assembly 5 to reduce the impact force between the moving part of the electromagnetic driving assembly and the top of the inner cavity of the housing 52 when the moving part rebounds under the elastic force of the first spring.

[0070] The first spring 42 is used to synchronize the rebound of the moving part 51 of the electromagnetic driving assembly and the ram assembly 6 to the initial position when the electromagnetic driving assembly is powered off and the electromagnetic force is eliminated. In view of the adverse effects of the rebound impact force, a shock pad 9 is arranged at the top center of the electromagnetic driving assembly 5. In practical applications, a receiving space can be formed at the top of the electromagnetic driving assembly 5, the shock pad is arranged in the receiving space, and a flat-end set screw 31 is screwed into the center threaded hole of the top adjusting assembly 3 above the shock pad 9, so that the shock pad 9 is tightly compressed, thereby effectively reducing the rebound impact force of the moving part 51 of the electromagnetic driving assembly and the ram assembly 6.

[0071] In an embodiment, as shown in Figure 3 , the electromagnetic driving glue injection jet valve further comprises:

[0072] A magnetic isolation pad 7 is arranged between the ram assembly 6 and the moving part 51 of the electromagnetic driving assembly. The magnetic isolation pad 7 is fixed to the center of the moving part 51 of the electromagnetic driving assembly 5 in the form of riveting, and the ram assembly 6 is rigidly bound to the moving part 51 of the electromagnetic driving assembly through the threaded hole in the center of the magnetic isolation pad 7 in the form of screwing and fastening.

[0073] In an embodiment, as shown in Figure 3 , the electromagnetic driving glue injection jet valve further comprises:

[0074] A sealing pad 8 is arranged at the bottom of the housing 1 and sleeved on the ram assembly 6, which is used to isolate the glue in the glue flow channel and prevent the glue from entering the inside of the glue injection jet valve.

[0075] The ram guide sleeve 65 can be arranged as a positioning and docking structure matched with the sealing pad 8, which is docked with the sealing pad 8 to ensure that the sealing pad 8 has the best sealing effect.

[0076] In an embodiment, please refer to Figure 3 , the valve seat 2 comprises:

[0077] A glue supply assembly interface 22 is used to connect the glue supply assembly 10.

[0078] A glue flow channel 23 is connected with the glue injection nozzle 21 at one end and connected with the glue supply assembly interface 22 at the other end.

[0079] The glue nozzle 21 is rigidly fixed in the corresponding stepped hole position in the nozzle fixing seat 24 of the valve seat 2 by means of gluing or other process methods. The whole formed by the glue nozzle 21 and the nozzle fixing seat 24 can be fastened to the valve seat 2 by means of commonly used screws of appropriate specifications (arranged in the circumferential direction of the flange surface). At the same time, two O-rings (25) are arranged on the contact surface between the nozzle fixing seat 24 and the valve seat 2, for reliably preventing the exudation of glue from the contact gap.

[0080] The glue injection and jetting valve of the application driven by an electromagnetic element is directly controlled by the driving source to realize the regulation and assembly of the valve body by means of conventional assembly and adjustment methods, which is very beneficial to mass production. At the same time, the electromagnetic element directly drives the linear motion of the striker rod to realize the ideal mode of the vertical linear reciprocating motion of the striker rod, eliminating the adverse factors causing the non-vertical motion of the striker rod, thus greatly optimizing the consistency of glue injection.

[0081] The assembly and adjustment process of the glue injection and jetting valve driven by an electromagnetic element of the application is briefly described as follows, please refer to Figure 4 :

[0082] (1) Pre-assembly of relevant parts in the following order:

[0083] ① The bottom adjustment sleeve 41 is screwed into the second threaded hole 15 provided on the partition plate 12 of the shell 1 and screwed down to the bottom for the assembly of other parts;

[0084] ② The first spring 42 is filled into the inner cavity of the bottom adjustment sleeve 41;

[0085] ③ The tail striker rod 62 is screwed into the electromagnetic drive assembly 5 and fastened in place, and the tail striker rod 62 and the electromagnetic drive assembly 5 are assembled into the shell 1 at the corresponding position shown in the figure;

[0086] ④ The top adjustment rod 3 is screwed into the first threaded hole 14 provided on the top plate 11 of the shell 1;

[0087] ⑤ The head striker rod 63, the second spring 66 and the striker rod guide sleeve 65 are sequentially assembled from the bottom of the shell 1 upwards, and the striker rod guide sleeve 65 is screwed in place. Figure 4

[0088] (2) Adjustment and final assembly:

[0089] By adjusting the screwing position of the bottom adjustment assembly 4 (mainly referring to the bottom adjustment sleeve 41) and the top adjustment assembly 3, the Figure 4 ​The shown δ value and L value are all optimal, wherein the first elastic force of the first spring 42 is determined by the δ value, and the optimal initial position of the head rod (rod assembly) is determined by the L value;

[0090] And, the screwed position of the rod guide sleeve 65 is adjusted to make the initial elastic force of the second spring 66 most suitable.

[0091] So far, the pre-adjustment of the glue injection jet valve driven by the electromagnetic drive of the present application has been completed. Next, only the remaining related parts are assembled in place according to the conventional process method according to the structure layout shown, and after the installation is completed, the valve cover plate is buckled and fastened, and the electromagnetic drive assembly housing is clamped and fixed, and thus the valve body assembly is completed. Figure 3

[0092] Compared with conventional piezoelectric valves, the structure scheme of the present application uses conventional methods throughout the assembly and debugging process, eliminating the complex operation links of piezoelectric ceramic pre-tightening and amplification lever leveling, greatly simplifying the valve body assembly process. At the same time, since the driving source directly controls the action of the valve rod, vertical single direction movement is realized, thereby ensuring the high consistency of the glue injection action of the on-off valve.

[0093] Each embodiment in the specification is described in a progressive manner, and the same or similar parts between each embodiment can be referred to each other. Each embodiment focuses on the differences from other embodiments. Those skilled in the art should understand that in the description of the specification, the description of the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the specification.

[0094] In the specification, the illustrative description of the above terms is not only for the same embodiment or example. In addition, those skilled in the art can combine and combine different embodiments or examples described in the specification and the features of different embodiments or examples without contradiction. The above is only an embodiment of the embodiment of the specification, and is not used to limit the specification. Those skilled in the art can make several improvements and refinements without departing from the present application, and these improvements and refinements are also considered within the protection scope of the present application. Any equivalent device made by using the content of the specification and the drawings, or directly or indirectly applied in other related technical fields, is also included in the patent protection scope of the present application.​

Claims

1. A dispensing spray valve employing electromagnetic drive, characterized in that, include: The housing includes a top plate, a partition plate, and a bottom plate; the top plate is provided with a first threaded hole, the partition plate is provided with a second threaded hole, and a valve seat is connected to the bottom plate; The top adjustment assembly is screwed into the first threaded hole; A bottom adjustment assembly is screwed into the second threaded hole. The bottom adjustment assembly includes a bottom adjustment sleeve and a first spring fixedly disposed inside the bottom adjustment sleeve. The electromagnetic drive assembly includes a housing fixedly disposed within the accommodating space between the top plate and the partition, and a moving component disposed within the inner cavity of the housing, the moving component generating a vertically upward or vertically downward displacement under the action of an external force; The impact rod assembly has one end rigidly connected to the moving part of the electromagnetic drive assembly, and the other end passes through the bottom adjustment assembly and the base plate, and is aligned with the glue nozzle on the valve seat; the impact rod assembly includes a first engaging assembly, the lower end of which engages with the upper end of the first spring; The top adjustment assembly, the bottom adjustment assembly, the electromagnetic drive assembly, the impact rod assembly, and the glue nozzle are coaxially arranged. When powered on, the moving parts of the electromagnetic drive assembly are subjected to a vertically downward electromagnetic force, resulting in a vertically downward displacement. This simultaneously moves the impact rod assembly downward to contact the dispensing nozzle, while the first spring accumulates elastic force. When powered off, the first spring releases its elastic force, simultaneously moving the impact rod assembly and the moving parts of the electromagnetic drive assembly upward. This causes the moving parts of the electromagnetic drive assembly to contact the top of the inner cavity of the outer shell, and the impact rod assembly to move away from the dispensing nozzle. Specifically, at the instant of energization, the moving part of the electromagnetic drive assembly moves vertically downward in a unidirectional linear motion under the action of the electromagnetic force generated at the instant of energization, and the moving part separates from the top of the inner cavity of the outer shell; the moving part synchronously drives the impact rod assembly to move downward against the rebound force of the first spring until the lower end of the impact rod assembly contacts the dispensing nozzle; when the moving part of the electromagnetic drive assembly drives the impact rod assembly to move downward, the impact rod assembly compresses the first spring downward, and the first spring further accumulates the second elastic force, and the elastic force of the first spring at this time is the sum of the first elastic force and the second elastic force; At the moment of power failure, the electromagnetic force disappears synchronously; the moving parts of the electromagnetic drive assembly and the impact rod assembly are only subjected to the upward elastic force of the first spring, which is the sum of the first elastic force and the second elastic force; under the action of the elastic force of the first spring, the moving parts of the electromagnetic drive assembly and the impact rod assembly move upward synchronously and rapidly until the top of the moving parts contacts the top of the inner cavity of the housing again, returning to the initial position in the power failure state. The spring force of the first spring also returns to the first spring force, and under its combined action with the top of the inner cavity of the outer shell, the moving parts and the impact rod assembly return to a balanced state. The magnitude of the spring force accumulated by the first spring and / or the length of the impact rod assembly extending out of the housing are achieved by adjusting the distance between the bottom adjustment assembly and the top adjustment assembly; the closer the bottom adjustment assembly is to the top adjustment assembly, the greater the spring force accumulated by the first spring; the positions of the electromagnetic drive assembly and the impact rod assembly relative to the housing are adjusted by adjusting the positions of the top adjustment assembly and the bottom adjustment assembly.

2. The electromagnetically driven dispensing valve according to claim 1, characterized in that, The batter assembly includes a head batter and a tail batter; The first end of the tail impact rod is rigidly connected to the moving part of the electromagnetic drive assembly, and the second end is fixed to the first end of the head impact rod through a fixing assembly; the second end of the head impact rod passes through the bottom adjustment assembly and the base plate, and is aligned with the dispensing nozzle on the valve seat.

3. The electromagnetically driven dispensing valve according to claim 2, characterized in that, The first engaging component is disposed on the tail striker, and the head striker also includes a second engaging component; The fixing component includes: The impact rod guide sleeve is screwed into the third threaded hole on the base plate; The second spring is sleeved inside the guide sleeve of the impact rod, and the lower end of the second spring is engaged with the guide sleeve of the impact rod; The second end of the head impact rod passes through the second spring and the impact rod guide sleeve, and the lower end of the second engaging assembly engages with the upper end of the second spring, the second spring storing elastic force; the head impact rod and the tail impact rod are in contact and fixed under the elastic force of the second spring.

4. The electromagnetically driven dispensing valve according to claim 3, characterized in that, The second end of the tail striker is a spherical surface; The first end of the head impact rod is a concave surface that mates with the spherical surface.

5. The electromagnetically driven dispensing valve according to claim 3, characterized in that, The amount of spring force stored in the second spring is achieved by adjusting the distance between the impact rod guide sleeve and the top adjustment assembly; the closer the impact rod guide sleeve is to the top adjustment assembly, the greater the spring force stored in the second spring.

6. The electromagnetically driven dispensing valve according to any one of claims 1 to 5, characterized in that, Also includes: A shock-absorbing pad is disposed on the top of the electromagnetic drive assembly to reduce the impact force between the moving parts of the electromagnetic drive assembly and the top of the inner cavity of the electromagnetic drive assembly when the moving parts of the electromagnetic drive assembly rebound under the elastic force of the first spring.

7. The electromagnetically driven dispensing valve according to any one of claims 1 to 5, characterized in that, Also includes: A magnetic shielding pad is disposed between the moving parts of the impact rod assembly and the electromagnetic drive assembly.

8. The dispensing valve with electromagnetic drive according to any one of claims 1 to 5, characterized in that, Also includes: A sealing gasket is disposed at the bottom of the housing and fitted onto the impact rod assembly.

9. The electromagnetically driven dispensing valve according to any one of claims 1 to 5, characterized in that, The valve seat includes: Adhesive supply component interface, used to connect the adhesive supply component; The glue channel has one end connected to the glue nozzle and the other end connected to the glue supply component interface.

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