Flow-adjustable vacuum and vacuum breaking integrated pilot electromagnetic valve

Abstract

The utility model relates to the technical field of pneumatic control, in particular to an adjustable flow type vacuum and vacuum breaking integrated pilot electromagnetic valve which comprises a main valve assembly, a pilot valve assembly, a connector assembly and a throttle plate assembly. The pilot valve assembly and the connector assembly are located on the two sides of the main valve assembly. The throttle plate assembly is located on the top of the main valve assembly. The positive pressure air inlet, the negative pressure air inlet, the butt joint hole and the working port are communicated with the valve cavity by controlling opening and closing of the pilot valve assemblies on the two sides so as to switch action of the valve rod, the throttling plate assembly comprises a throttling plate arranged on the top, the throttling plate is provided with an adjusting hole and a working port, an adjustable adjusting needle is arranged in the adjusting hole and is in threaded connection with the adjusting hole, and the working port is in threaded connection with the working port. The end of the adjusting needle is located in the throttling hole, the gap between the throttling hole and the adjusting needle can be adjusted by rotating the adjusting needle, and therefore the air flow in the vacuum breaking state is flexibly controlled, the requirements of different workpieces for releasing force are met, and the situation that the workpieces are damaged or released unstably due to too large or too small air flow is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to pneumatic control technical field especially relates to a kind of adjustable flow type vacuum and vacuum breaking integrated pilot solenoid valve. BACKGROUND

[0002] Vacuum and vacuum breaking pilot solenoid valve is mainly applied to material handling scene, especially suitable for the handling of small workpieces, chips and the like. The working port of the solenoid valve is usually connected with a suction cup, and the suction and release of the material are realized by switching the negative and positive air pressure of the solenoid valve. When one end of the solenoid valve is powered, the working port generates negative air pressure, and the suction cup adsorbs the workpiece; when the other end of the solenoid valve is powered, the working port generates positive air pressure, and the workpiece is released, thereby completing the handling operation.

[0003] However, most of the vacuum and vacuum breaking pilot solenoid valves on the market currently only have simple vacuum start-stop functions, and some vacuum and vacuum breaking integrated solenoid valves have the problems of large size, complicated vacuum and vacuum breaking function switching, and inability to conveniently adjust the working flow, which makes it difficult to meet the precise control requirements of air flow intensity in different material release scenarios.

[0004] The information disclosed in this BACKGROUND section is only intended to enhance the understanding of the general background of the present utility model, and should not be regarded as acknowledging or implying in any form that this information constitutes prior art known to those skilled in the art. SUMMARY

[0005] The utility model provides a kind of adjustable flow type vacuum and vacuum breaking integrated pilot solenoid valve, to effectively solve the problems in the background art.

[0006] To achieve the above purpose, the utility model adopts the technical scheme of: a kind of adjustable flow type vacuum and vacuum breaking integrated pilot solenoid valve, comprising: main valve assembly, pilot valve assembly, connector assembly and throttle plate assembly;

[0007] The pilot valve assembly and the connector assembly are arranged on both sides of the main valve assembly; the throttle plate assembly is arranged on the top of the main valve assembly;

[0008] The main valve assembly comprises a valve body, a piston, a valve rod and a front cover, the valve body is provided with a valve cavity, and a positive pressure inlet, a pilot inlet, a negative pressure inlet, a throttle hole and a docking hole which are communicated with the valve cavity respectively, wherein the positive pressure inlet, the pilot inlet and the negative pressure inlet are arranged on the same side of the valve body, the throttle hole and the docking hole are arranged on the other side of the valve body, and a groove for communicating the throttle hole and the docking hole is arranged on the valve body; two front covers are arranged on the two sides of the valve body respectively; the two valve rods and the piston are symmetrically arranged in the valve cavity, and the opening and closing of the pilot valve assembly on the two sides is controlled, so that the positive pressure inlet, the negative pressure inlet, the throttle hole and the docking hole are communicated with the valve cavity respectively, so as to realize the switching and resetting of the valve rod action.

[0009] The throttle plate assembly comprises a throttle plate arranged on the top of the valve body, the throttle plate is provided with an adjusting hole and a working port, the adjusting hole is provided with an adjusting pin, the adjusting pin is screwed with the adjusting hole, and the end of the adjusting pin is arranged in the throttle hole, by rotating the adjusting pin, the gap between the throttle hole and the adjusting pin is adjusted, so as to control the flow of the working port in the broken vacuum state.

[0010] Further, the adjusting pin comprises a first diameter section, a second diameter section and a third diameter section arranged in sequence, the third diameter section is larger than the second diameter section, the second diameter section is larger than the first diameter section, and the first diameter section is inserted into the throttle hole.

[0011] Further, the first diameter section is provided with a taper, and the diameter of the first diameter section gradually increases from the end.

[0012] Further, the end of the adjusting pin is provided with a round corner for guiding and protecting the throttle hole.

[0013] Further, the third diameter section is provided with an annular groove at one end away from the throttle hole, the annular groove is provided with a first sealing ring, and a threaded section for up and down tightening and loosening adjustment is arranged on the third diameter section between the annular groove and the second diameter section.

[0014] Further, the back of the adjusting pin is provided with a one-way groove.

[0015] Further, the end of the adjusting hole is provided with a convex ring formed by pressing the thin wall hole of the end of the adjusting hole to the center direction by a tool, and the convex ring extends to the inner side of the adjusting hole, preventing the adjusting pin from falling off due to excessive loosening.

[0016] Further, the end face of the valve body close to the throttle hole and the docking hole is provided with a waist-shaped groove, and the waist-shaped groove is provided with a second sealing ring.

[0017] Further, the connector assembly comprises a horizontal part and a vertical part which are perpendicular to each other, the horizontal part is internally provided with a pin, the vertical part is provided with a contact spring on the side away from the pin, the pin is in contact with an external terminal wire, and the contact spring is in contact with a coil terminal on the pilot valve assembly, so that the pilot valve assembly and the terminal coil are quickly connected.

[0018] Further, the front cover comprises a body and a protruding edge which is perpendicular to the body, the body is arranged on both sides of the valve body by screwing, and the protruding edge is arranged on the top of the valve body.

[0019] The utility model discloses the beneficial effect is: the utility model discloses through the adjustable adjusting needle design in throttle plate subassembly, can accurate control the clearance between throttle hole and adjusting needle, thereby the flexible adjustment gas flow under the broken vacuum state, satisfy the accurate demand of different workpieces to release intensity, avoid the workpiece damage or release instability due to excessive or too small airflow. This adjustable flow characteristic makes in the material handling process can carry out gentle release to workpiece, avoids the workpiece damage or operating error due to excessive flow. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical scheme in the embodiment of the utility model or prior art, the following will briefly introduce the drawings needed to be used in the embodiment or prior art description, and obviously, the drawings in the following description are only some embodiments in the utility model, and for those skilled in the art, other drawings can also be obtained according to these drawings without creating labor.

[0021] Figure 1 It is a structure schematic view of the adjustable flow type vacuum and broken vacuum integrated pilot electromagnetic valve;

[0022] Figure 2 It is a sectional view of the adjustable flow type vacuum and broken vacuum integrated pilot electromagnetic valve;

[0023] Figure 3 It is a structure schematic view of the adjustable flow type vacuum and broken vacuum integrated pilot electromagnetic valve; Figure 2 It is a local enlarged view of A in the figure;

[0024] Figure 4 It is a structure schematic view of the adjustable flow type vacuum and broken vacuum integrated pilot electromagnetic valve (vacuum breaking state);

[0025] Figure 5 It is a structure schematic view of the adjustable flow type vacuum and broken vacuum integrated pilot electromagnetic valve (vacuum adsorption state);

[0026] Figure 6 It is a structure schematic view of the valve body;

[0027] Figure 7 Structure diagram of throttle plate;

[0028] Figure 8 Structure diagram of adjusting needle;

[0029] Figure 9 Explosive diagram of pilot valve assembly, connector assembly and terminal wire;

[0030] Figure 10 Sectional view of connector assembly.

[0031] Fig. 1 is a main valve assembly; 11 is a valve body; 111 is a positive pressure air inlet; 112 is a pilot air inlet; 113 is a negative pressure air inlet; 114 is a throttle hole; 115 is a butt joint hole; 116 is a groove; 117 is a waist-shaped groove; 118 is a second sealing ring; 119 is a valve cavity; 12 is a piston; 13 is a valve rod; 14 is a front cover; 141 is a body; 142 is a convex edge; 2 is a pilot valve assembly; 21 is a coil terminal; 3 is a connector assembly; 31 is a horizontal part; 311 is a pin; 32 is a vertical part; 321 is a contact spring; 4 is a throttle plate assembly; 41 is a throttle plate; 411 is an adjusting hole; 411a is a convex ring; 412 is a working port; 42 is an adjusting needle; 421 is a first diameter section; 421a is a round corner; 422 is a second diameter section; 423 is an annular groove; 424 is a first sealing ring; 425 is a third diameter section; 5 is a terminal wire. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments.

[0033] In the description of the present application, it should be noted that the orientation or position relationship indicated by "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present application.

[0034] In the description of the utility model, it is necessary to explain, unless another explicit provision and limitation, the term "installation", "link", "connection" should do the broad sense understanding, for example, can be fixed connection, also can be detachable connection, or integral type connection, can be mechanical connection, also can be electrical connection, can be direct connection, also can be indirectly connected through intermediate medium, can be the intercommunication of two elements. For ordinary skilled in the art, the specific meaning of the above-mentioned terms in the utility model can be understood according to specific circumstances.

[0035] As shown in Figures 1 to 10 : a flow adjustable type vacuum and vacuum breaking integrated pilot electromagnetic valve, comprising: main valve assembly 1, pilot valve assembly 2, connector assembly 3 and throttle plate assembly 4;

[0036] Pilot valve assembly 2 and connector assembly 3 are arranged on both sides of main valve assembly 1;Throttle plate assembly 4 is arranged on the top of main valve assembly 1;

[0037] Main valve assembly 1 includes valve body 11, piston 12, valve stem 13 and front cover 14, valve body 11 is provided with valve cavity 119, and positive pressure inlet 111, pilot inlet 112, negative pressure inlet 113, throttle hole 114 and docking hole 115 communicated with valve cavity 119 respectively, wherein positive pressure inlet 111, pilot inlet 112 and negative pressure inlet 113 are arranged on the same side of valve body 11, throttle hole 114 and docking hole 115 are arranged on the other side of valve body 11, and recess 116 for communicating throttle hole 114 and docking hole 115 is arranged on valve body 11;Two front covers 14 are arranged on both sides of valve body 11;Two valve stems 13 and pistons 12 are symmetrically arranged in valve cavity 119, control the opening and closing of two pilot valve assemblies 2, make positive pressure inlet 111, negative pressure inlet 113, throttle hole 114 and docking hole 115 communicate with valve cavity 119 respectively, to realize the switching and reset of valve stem 13 action;

[0038] Throttle plate assembly 4 includes throttle plate 41 arranged on the top of valve body 11, throttle plate 41 is provided with adjusting hole 411 and working port 412, adjusting needle 42 is arranged in adjusting hole 411, adjusting needle 42 is screwed with adjusting hole 411, and the end of adjusting needle 42 is arranged in throttle hole 114, by rotating adjusting needle 42, the gap of throttle hole 114 and the first diameter section taper part of adjusting needle 42 is adjusted, to control the flow of working port 412 under vacuum breaking state.

[0039] Connector assembly 3 controls the opening and closing of the pilot valve via a built-in circuit board; pilot valve assembly 2 switches and resets the valve stem 13 in the main valve by opening and closing the pilot valve; main valve assembly 1 switches between positive pressure inlet 111 → working port 412 (vacuum breaking) and negative pressure inlet 113 → working port 412 (vacuum adsorption) functions by switching the valve stem 13. The working port 412 is connected to the product, thereby releasing and sucking up the product; it can be used as a single solenoid valve or multiple solenoid valves can be integrated into a valve group, which is flexible and versatile and has a wide range of applications.

[0040] Functional Overview: Pilot inlet 112 supplies pilot air (positive pressure, which can be introduced from the same air source as the working port 412); positive pressure inlet 111 supplies positive pressure; negative pressure inlet 113 supplies negative pressure; and the working port 412 is equipped with a vacuum suction cup. For example... Figure 2 As shown, when the pilot valves on both sides are not energized, pilot air flows through the pilot air hole of valve body 11 and through front cover 14 to the pilot valve inlet. At this time, the pilot valve inlet is sealed and in a non-working state, valve stem 13 does not move, and working port 412 has no pressure. Figure 5 As shown, when the right pilot valve is energized, the right pilot valve inlet opens, and pilot air flows from the pilot valve inlet through the pilot valve working port to the right piston 12 chamber of the main valve, pushing the right valve stem 13 to the left. At this time, the negative pressure inlet 113 is connected to the docking hole 115, and the working port 412 is in a vacuum working state, adsorbing the workpiece. When the right pilot valve is de-energized, the right pilot valve inlet is sealed, and the residual air in the pilot valve is discharged through the exhaust port. At this time, the pilot air in the pilot inlet 112 pushes the right valve stem 13 to reset, and the valve stem 13 returns to the inactive state. Figure 4 As shown, when the left pilot valve is energized, the left pilot valve inlet is open, and pilot gas flows from the pilot valve inlet through the pilot valve working port to the left piston 12 chamber of the main valve, pushing the left valve stem 13 to the right. At this time, the positive pressure inlet 111 is connected to the docking hole 115, and the working port 412 is supplied with positive pressure gas, which is in a vacuum breaking working state, and the workpiece can be detached. When the left pilot valve is de-energized, the left pilot valve inlet is sealed, and the residual gas in the pilot valve is discharged through the exhaust port. At this time, the pilot gas in the pilot inlet 112 pushes the left valve stem 13 to reset, and the valve stem 13 returns to the non-operational state.

[0041] Continue to refer to Figure 4 When the pilot valve on the left is energized, the main valve is in the vacuum breaking working state (pressure switches to positive pressure). Adjusting the adjusting needle 42 to tighten or loosen changes the gap between the needle tip at the bottom of the adjusting needle 42 and the throttling orifice 114 of the valve body 11. Tightening the adjusting needle 42 downwards reduces the gap, and the flow rate of the docking hole 115 decreases relatively until it is sealed. Tightening the adjusting needle 42 upwards increases the gap, and the flow rate of the docking hole 115 gradually recovers.

[0042] The adjustable adjustment needle 42 in the throttle plate assembly 4 allows for precise control of the gap between the throttle orifice 114 and the adjustment needle 42, thereby flexibly adjusting the airflow under vacuum conditions to meet the precise release force requirements of different workpieces. This avoids workpiece damage or unstable release due to excessive or insufficient airflow. This adjustable flow characteristic enables the smooth release of workpieces during material handling, preventing workpiece damage or operational errors caused by excessive flow.

[0043] In addition, this solenoid valve can be used alone or multiple solenoid valves can be combined to form a valve group, which can flexibly adapt to various complex industrial scenarios and enhance its applicability.

[0044] In this embodiment, as Figure 3 , Figure 8 As shown, the adjusting needle 42 includes a first diameter segment 421, a second diameter segment 422, and a third diameter segment 425 arranged sequentially. The third diameter segment 425 is larger than the second diameter segment 422, and the second diameter segment 422 is larger than the first diameter segment 421. The first diameter segment 421 is inserted into the throttling orifice 114. Specifically, the multi-segment design increases the rigidity of the adjusting needle 42 by changing the diameter distribution, providing higher pressure resistance. Especially in high-pressure airflow or frequently switching working environments, it can effectively withstand large pressure shocks and working loads.

[0045] As a preferred embodiment of the above, the first diameter segment 421 is tapered, and the diameter of the first diameter segment 421 gradually increases from the end. This is used to improve the sealing performance and adjustment stability when inserted into the throttling orifice 114. When the adjusting pin 42 is screwed in deeper, the distance of the first diameter segment 421 into the throttling orifice 114 increases. Since the first diameter segment 421 is tapered and the diameter gradually increases, the gap between the side wall of the first diameter segment 421 and the opening of the throttling orifice 114 gradually decreases, thereby achieving flow regulation. The tapered design causes a slight change in the gap between the throttling orifice 114 and the first diameter segment 421 through the change in the screwing depth of the adjusting pin 42, thereby changing the size of the airflow channel and achieving the purpose of precise flow control. The pitch between the adjusting pin 42 and the adjusting orifice 411 can be deliberately selected to be small for easy fine control.

[0046] The adjusting needle 42 has a rounded corner 421a at its end, which is used to guide and protect the throttling orifice 114. Specifically, on the one hand, the rounded corner 421a at the end of the adjusting needle 42 provides a good guiding effect when inserted into the throttling orifice 114, and the improved guiding performance makes the operation of the adjusting needle 42 smoother. On the other hand, the rounded corner 421a design can prevent the sharp or rough edge of the end of the adjusting needle 42 from scratching or irregularly wearing the throttling orifice 114, thereby ensuring that the sealing performance between the adjusting needle 42 and the throttling orifice 114 is always in the best state. The stable sealing performance can maintain the accuracy of airflow regulation, and the effect is more obvious in scenarios that require high sealing performance.

[0047] In this embodiment, the back of the adjusting needle 42 is provided with a slot for inserting the operating tool to facilitate the rotation adjustment of the adjusting needle 42.

[0048] The third diameter section 425 has an annular groove 423 circumferentially located at the end away from the throttling orifice 114. A first sealing ring 424 is provided in the annular groove 423. The third diameter section 425 located between the annular groove 423 and the second diameter section 422 has a threaded section for tightening and loosening adjustment. Specifically, this enhances the sealing performance between the adjusting pin 42 and the adjusting hole 411, preventing gas leakage from the throttling orifice 114 and ensuring the stability and reliability of vacuum and vacuum breaking working conditions.

[0049] As a preferred embodiment of the above, such as Figure 3 , 7 As shown, the end of the adjustment hole 411 is provided with a convex ring 411a formed by pressing the thin-walled circular hole around the end towards the center through a tool. The convex ring 411a extends inward to the adjustment hole 411 to prevent the adjustment pin 42 from being loosened too much and falling off. Specifically, the convex ring 411a extends inward to form a physical limit with the movement of the adjustment pin 42, and the convex ring 411a prevents the adjustment pin 42 from falling off.

[0050] In this embodiment, as Figure 6 As shown, the valve body 11 has a waist-shaped groove 117 on the end face near the throttling orifice 114 and the docking hole 115. A second sealing ring 118 is provided in the waist-shaped groove 117 to increase the sealing between the throttling orifice 114 and the regulating hole 411, and between the docking hole 115 and the working port 412, to prevent gas leakage at these connection parts, and to ensure the airtightness of the equipment under vacuum and vacuum breaking conditions, thereby improving the working efficiency and reliability of the solenoid valve.

[0051] As a preferred embodiment of the above, such as Figure 9 , Figure 10As shown, the connector assembly 3 includes a horizontal portion 31 and a vertical portion 32 that are perpendicular to each other. The horizontal portion 31 is provided with a pin 311, and the vertical portion 32 is provided with a contact spring 321 on the side away from the pin 311. The pin 311 contacts the external terminal wire 5, and the contact spring 321 contacts the coil terminal 21 on the pilot valve assembly 2, for quick connection between the pilot valve assembly 2 and the terminal coil 5. On the one hand, the design of the pin 311 and the contact spring 321 in the connector assembly 3 can quickly realize the connection between the pilot valve and the external terminal coil 5, simplifying the connection process, reducing assembly time, and improving assembly efficiency. On the other hand, the addition of the connector assembly 3 is to improve waterproof performance and prevent short circuits caused by moisture. In addition, the vertical design of the horizontal portion 31 and the vertical portion 32 makes the connector assembly 3 compact in structure and occupies little space, making it suitable for installation in space-constrained equipment environments.

[0052] As a preferred embodiment of the above, the front cover 14 includes a body 141 and a protruding edge 142 perpendicular to the body 141. The body 141 is screwed onto both sides of the valve body 11, and the protruding edge 142 is located on the top of the valve body 11. Specifically, the front cover 14 body 141 is screwed onto both sides of the valve body 11, which provides a strong and reliable mechanical connection and prevents loosening or displacement during long-term use or high-frequency operation. The protruding edge 142 is perpendicular to the body 141 and is located on the top and side of the valve body 11, respectively, providing a positioning reference for assembly and further improving the efficiency and accuracy of assembly.

[0053] Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A pilot solenoid valve with adjustable flow rate and integrated vacuum and vacuum breaking functions, characterized in that, include: Main valve assembly, pilot valve assembly, connector assembly, and throttle plate assembly; The pilot valve assembly and the connector assembly are disposed on both sides of the main valve assembly; the throttle plate assembly is disposed on the top of the main valve assembly; The main valve assembly includes a valve body, a piston, valve stems, and a front cover. The valve body has a valve cavity, and a positive pressure inlet, a pilot inlet, a negative pressure inlet, a throttling orifice, and a docking hole respectively communicating with the valve cavity. The positive pressure inlet, the pilot inlet, and the negative pressure inlet are located on the same side of the valve body, while the throttling orifice and the docking hole are located on the other side of the valve body. A groove is provided on the valve body for connecting the throttling orifice and the docking hole. Two front covers are respectively located on both sides of the valve body. Two valve stems and the piston are symmetrically arranged within the valve cavity, controlling the opening and closing of the pilot valve assemblies on both sides, so that the positive pressure inlet, the negative pressure inlet, the throttling orifice, and the docking hole respectively communicate with the valve cavity, thereby achieving the switching and resetting of the valve stem action. The throttling plate assembly includes a throttling plate disposed on the top of the valve body. The throttling plate has an adjustment hole and a working port. An adjustment needle is disposed in the adjustment hole and is screwed to the adjustment hole. The end of the adjustment needle is disposed in the throttling hole. By rotating the adjustment needle, the gap between the throttling hole and the adjustment needle is adjusted to control the flow rate of the working port under vacuum conditions.

2. The adjustable flow type vacuum and vacuum breaking integrated pilot solenoid valve according to claim 1, characterized in that, The adjusting needle includes a first diameter segment, a second diameter segment, and a third diameter segment arranged sequentially. The third diameter segment is larger than the second diameter segment, and the second diameter segment is larger than the first diameter segment. The first diameter segment is inserted into the throttling orifice.

3. The adjustable flow type vacuum and vacuum breaking integrated pilot solenoid valve according to claim 2, characterized in that, The first diameter segment has a taper, and the diameter of the first diameter segment gradually increases from the end.

4. The adjustable flow type vacuum and vacuum breaking integrated pilot solenoid valve according to claim 2, characterized in that, The third diameter segment is provided with an annular groove at one end away from the throttling orifice. A first sealing ring is provided in the annular groove. The third diameter segment located between the annular groove and the second diameter segment is provided with a threaded section for tightening and loosening adjustment.

5. The adjustable flow type vacuum and vacuum breaking integrated pilot solenoid valve according to claim 1, characterized in that, The end of the adjusting needle is rounded to guide and protect the throttling orifice.

6. The adjustable flow type vacuum and vacuum breaking integrated pilot solenoid valve according to claim 1, characterized in that, The back of the adjusting pin has a slot.

7. The adjustable flow type vacuum and vacuum breaking integrated pilot solenoid valve according to claim 1, characterized in that, The end of the adjustment hole is provided with a convex ring formed by pressing the thin-walled circular hole around the end towards the center using a tool, and the convex ring extends into the inside of the adjustment hole to prevent the adjustment pin from being loosened too much and falling off.

8. The adjustable flow type vacuum and vacuum breaking integrated pilot solenoid valve according to claim 1, characterized in that, The valve body has a waist-shaped groove on the end face near the throttling orifice and the docking hole, and a second sealing ring is provided in the waist-shaped groove.

9. The adjustable flow type vacuum and vacuum breaking integrated pilot solenoid valve according to claim 1, characterized in that, The connector assembly includes a horizontal portion and a vertical portion that are perpendicular to each other. A pin is provided in the horizontal portion, and a contact spring is provided on the side of the vertical portion away from the pin. The pin contacts an external terminal wire, and the contact spring contacts a coil terminal on the pilot valve assembly for quick connection of the pilot valve assembly and the terminal coil.

10. The adjustable flow type vacuum and vacuum breaking integrated pilot solenoid valve according to claim 1, characterized in that, The front cover includes a body and a protruding edge perpendicular to the body. The body is screwed onto both sides of the valve body, and the protruding edge is located on the top of the valve body.

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