WO2021042404A1

WO2021042404A1 - Solenoid valve and production process therefor

Info

Publication number: WO2021042404A1
Application number: PCT/CN2019/104914
Authority: WO
Inventors: 熊颖申; 古礼华; 卢焕禄
Original assignee: 深圳华星恒泰泵阀有限公司
Priority date: 2019-09-02
Filing date: 2019-09-09
Publication date: 2021-03-11
Also published as: CN110529649B; CN110529649A

Abstract

A solenoid valve and a production process therefor, the solenoid valve comprising a sleeve tube (1), a static iron core (2), a movable iron core (3), a compression spring (4), a single-head valve body (5), a water inlet (51), a water outlet (52), a coil bobbin (61), a coil (62), an injection moulded encapsulating layer (63), a holding frame (7), a sealing head installation groove (31), and a sealing rubber head (32); the production process comprises: manufacturing a semi-finished coil component; coil encapsulation; folding the terminals; assembling the static iron core (2), a clamping ring (9), and the holding frame (7); assembling the sleeve tube (1); assembling the coil component and the sleeve tube (1); riveting the holding frame (7); mounting the sealing rubber head (32), the compression spring (4), and the moveable iron core (3); mounting the single head valve body (5); and testing the solenoid valve performance.

Description

Solenoid valve and its production process

Technical field

The invention relates to the field of solenoid valves, in particular to a solenoid valve and its production process.

Background technique

The miniature solenoid valve is a widely used industrial product. The traditional miniature solenoid valve generally has the following defects: 1. The charged body in the existing miniature solenoid valve is easy to be exposed, which is difficult to apply to high-pressure occasions, and the scope of application is small; 2 , The existing solenoid valve needs to be electrically connected by a lead wire, which is inconvenient to apply and has limited application scope; 3. The movable iron core of the existing solenoid valve is easy to rust and damage, has a short service life and poor performance reliability; 4. The existing solenoid valve The reliability of the sealing structure in the valve is insufficient, the sealing performance is poor during the application process, and the installation is not convenient enough.

In short, the existing miniature solenoid valve has defects such as limited application scope, inconvenient use, easy rust damage, short application life, poor reliability, and insufficient sealing performance. These defects severely limit the further development and promotion of this field. application.

In view of this, the purpose of the present invention is to provide a new technical solution to solve the existing technical defects.

Summary of the invention

In order to overcome the shortcomings of the prior art, the present invention provides a solenoid valve and its production process, which solves the technical defects of the prior art, such as small application range, inconvenient use, poor reliability, short service life, and insufficient sealing performance.

The technical solutions adopted by the present invention to solve its technical problems are:

A solenoid valve includes a sleeve, a static iron core and a moving iron core arranged inside the sleeve, a compression spring is arranged between the static iron core and the moving iron core, and the upper part of the sleeve is provided with an outer wall of the sleeve A sealed single-head valve body, the single-head valve body is provided with a water inlet and a water outlet, the sleeve is provided with a coil frame, the coil frame is wrapped with a coil, and the coil is wrapped with an injection molding rubber A cage is provided outside the injection molding encapsulation layer, a sealing head installation groove is opened at the upper end of the movable iron core, and a sealing rubber head matching it is provided in the sealing head installation groove, and the movable iron core It can drive the sealant head to move and control the water inlet and the water outlet to communicate or cut off.

As an improvement of the above-mentioned technical solution, the side of the injection molding overcoat layer is provided with a contact piece, the contact piece and the injection molding overcoat layer are integrally connected by injection molding, and the part of the contact piece injection molded inside the injection molding overcoat layer is electrically connected to the coil. When connected, the other end of the contact piece is exposed outside the injection-molded encapsulation layer and bent at 90° to form a coil terminal.

As a further improvement of the above technical solution, the static iron core and the moving iron core are both soft magnetic cores, the sealing head mounting groove is provided with a mounting groove snap ring at the slot position, and the sealing rubber head is a conical cylindrical seal A rubber head, one end of the sealant head has a tapered bevel, and the outer edge of the other end of the sealant head is provided with a rubber head annular clamping position matching the mounting groove snap ring, and the sealant head is installed behind the sealing rubber head installation groove , The snap ring of the installation groove is clamped on the ring clamp position of the rubber head.

As a further improvement of the above technical solution, the single-head valve body has a valve body cavity and a water inlet channel and a water outlet channel communicating with the valve body cavity, and the movable iron core can drive the sealant head to move to the entrance of the water outlet channel and The water inlet channel and the water outlet channel are separated from each other, the water inlet is arranged at the entrance of the water inlet channel, and the water outlet is arranged at the outlet of the water outlet channel.

As a further improvement of the above technical solution, a holder cover is provided on the upper part of the holder, and the holder cover is sleeved on the outer wall of the upper part of the sleeve.

As a further improvement of the above technical solution, the upper outer wall of the static iron core has a static iron core compression spring clamping position, the lower end outer wall of the movable iron core has a movable iron core compression spring clamping position, and the lower end of the compression spring is clamped on the fixed iron core compression spring. On the static iron core compression spring clamping position, the upper end of the compression spring is clamped on the movable iron core compression spring clamping position.

As a further improvement of the above technical solution, a valve body sealing ring is provided between the single-head valve body and the outer wall of the sleeve, and a static iron core sealing ring is provided between the inner wall of the sleeve and the outer wall of the static iron core.

As a further improvement of the above technical solution, the bottom of the cage is provided with an iron core passing through hole, and the lower part of the static iron core is provided with a static iron core annular clamping position which facilitates mutual positioning with the holder and passes through the static iron core annular The clamping position clamps the iron core opened at the bottom of the cage through the upper part of the through hole, the lower end of the static iron core passes through the iron core and passes through the through hole and then is clamped with a clamp ring, and the upper wall of the clamp ring abuts against The lower wall of the cage.

As a further improvement of the above technical solution, the sleeve is a copper tube, the static iron core and the moving iron core are both SUS430 iron cores, the sealant head is an EPDM sealant head, and the cage is SPCC plate, holding The surface of the frame is plated with a blue zinc layer, and the compression spring is made of SUS304 spring steel.

As a further improvement of the above technical solution, the inner wall of the sleeve and the outer wall of the moving iron core have an outflow gap communicating with the water inlet, and the static iron core is provided with a static iron core that penetrates up and down and communicates with the outflow gap. Outflow channel, the lower end of the movable iron core is provided with a second sealing groove installation groove, the second sealing groove installation groove is provided with a second sealant head, and the movable iron core can drive the second sealant head to move and Close the upper entrance of the static iron core outflow channel.

As a further improvement of the above technical solution, a second mounting groove snap ring is provided at the position of the second sealing head mounting groove, and the second sealing rubber head is a conical cylindrical sealing rubber head. One end has a tapered bevel, the outer edge of the other end of the second sealant head is provided with a second sealant ring-shaped clamping position matching the second mounting groove snap ring, and the second sealant head is installed on the second sealant head After the installation groove, the installation groove snap ring is clamped on the rubber head ring clamp position.

A production process of a solenoid valve includes the following process steps:

Step 1: Making a semi-finished coil component, making a coil bobbin and putting a contact piece on the coil bobbin, and then winding a coil on the coil bobbin with the contact piece to form a semi-finished coil component;

Step 2: Coil encapsulation, send the semi-finished coil component into the matching design injection mold for injection encapsulation, after the injection encapsulation is completed, an injection encapsulation layer is formed on the outside of the coil to obtain the finished coil component;

Step 3: Fold the terminal, use terminal bending equipment to process the contact piece exposed outside the injection molding encapsulation layer for bending treatment, the bent contact piece forms the coil terminal of the coil assembly, and the angle of the contact piece is 90°;

Step 4: Assemble the static iron core, clamp ring and cage, put the clamp ring and cage on the special clamp ring assembly jig, then take the static iron core and insert it into the corresponding mounting hole inside the cage, and confirm the static iron core After it is in place, the clamp ring assembly jig pushes the clamp ring into the corresponding card position in the static iron core to complete the assembly process of the clamp ring;

Step 5: Assemble the sleeve, and wrap the sleeve on the outer wall of the static iron core, and the inner wall of the sleeve and the outer wall of the static iron core are sealed and matched;

Step 6: Assemble the coil component and the sleeve, and put the finished coil component into the outside of the sleeve;

Step 7: Riveting the cage, placing the cage assembled with the coil assembly into a special riveting jig, and riveting the cage cover on the cage with the riveting jig;

Step 8: Install the sealant head, compression spring and moving iron core, first install the sealant head in the sealant head installation groove at the end of the moving iron core, then install the compression spring into the casing, and finally install the The movable iron core of the sealant head is installed in the sleeve, and the compression spring is located between the movable iron core and the static iron core;

Step 9: Install the single-head valve body, assemble the single-head valve body on the upper part of the holder and fix the connection with screws;

Step 10: Performance test of solenoid valve.

As a further improvement of the above technical solution, the solenoid valve performance test in the tenth step includes:

For high voltage test, put the screwed solenoid valve product on the test rack, and then press the start switch to start the test. If the pressure is leaking, the device will alarm. If the alarm is detected, take it out and make a mark. This is a defective product. ；

2.5Bar pressure holding test, put the finished solenoid valve on the test rack, press the start switch, start to input 2.5Bar air pressure after power on, then power off and hold the pressure for 10 seconds, the sink leakage cannot be lower than 2.47Bar during the pressure hold, the test is complete After reading the display screen result, the qualified product is taken out and transferred to the next process, and the defective product corresponding to the test head is taken out and marked and placed in the defective plate;

For flow test, put the finished solenoid valve on the test stand and press the start switch. At this time, the coil is energized, and the water inlet must be filled with water. After the power is off, the water outlet can not flow out, and it can be automatically closed. Read after the test is completed The test results of the display screen, the qualified products are taken out and transferred to the next process, and the defective products corresponding to the test head are taken out and marked and placed in the defective product tray. The two outlet ports cannot discharge water at the same time, and the ones that cannot be switched on and off freely are defective products. The test water should be replaced every four hours and the water replacement record should be made;

2Bar on and off, low pressure start test: 1. Put the product on the test rack and press the start switch. At this time, the valve cannot be energized, and the water should be supplied first; 2. When the coil is not energized, when the pressure increases to 2.0-2.3Bar After that, the valve should be able to make and break freely; 3. When the valve is working, after adding a back pressure of 2.0-2.3 Bar at the water outlet, the valve should have a free on and off function.

As a further improvement of the above technical solution, in step one, the coil bobbin made of PA66+25% GF is printed on the automatic contact sheet machine through the winding group to make the contact sheet made of brass and nickel plating, and then the contact sheet is made by Automatic winding machine winding, butt welding, so as to make winding semi-finished products, that is, semi-finished coil components;

In step 2, the semi-finished coil component is sent to the designed mold for injection overmolding. The raw material of the injection overmolding layer: PA66 modified-YH630\UL94V-0. After injection molding, the finished coil assembly is obtained;

In step 3, check the finished coil assembly and check whether the coil in the coil assembly has any defects such as exposed copper, inconsistent terminal length or lack of glue, and then put it on the jig to confirm that it is in place, press the hand switch to start Bend the coil terminal to 90 degrees with the jig;

In step 4, after checking whether the cage made of SPCC blue zinc plating and can withstand the 48-hour smoke test is rusty or oxidized, the clamp made of SUS304 and can withstand the 24-hour smoke test is opened with an opening Place the inward chamfered face up on the jig, and place the holder on the jig, and then put the static iron core into the corresponding mounting hole of the holder. After confirming that it is in place, press the start switch with both hands to start the cylinder. Push the clamp ring into the slot of the static iron core;

In step 5, check whether the clamp ring is in place and whether the clamp ring is deformed; then twist the bell mouth end of the bushing made of brass into the static iron core by hand and seal it with the static iron core to confirm whether Assembled in place;

In step 6, check that the bell end of the casing sleeves the static iron core and installs it on the bottom of the cage, and then sleeve the rubberized coil assembly into the casing, and take the cage cover made of SPCC blue zinc plating to invert it. Install on the top of the coil assembly with the corner face up;

In step 7, put the coil assembly with the cage and cage cover on the riveting tool. After confirming that it is installed in place, press the jig start switch with both hands, and the cylinder starts to rive the cage punching gap, and the cage is riveted. The gap is in the middle, and the gap between the riveted cage and the cage cover cannot be greater than 0.2mm;

In step eight: check the sealant head made of EPDM and the movable iron core made of SUS430, put the sealant head into the sealant head installation groove of the movable iron core, and the sealant head must be completely pressed into the sealant In the head installation groove, the sealant head should be flattened on the end surface of the moving iron core; check that the compression spring is made of SUS304 spring steel, put the compression spring into the inner sleeve of the coil assembly, and check that the valve body seal ring made of EPDM cannot have If it breaks or breaks, install the qualified valve body sealing ring into the outer side of the top of the casing and ensure that the valve body sealing ring is in close contact with the surface of the cage. Put the moving iron core into the casing and place it in the blister.

As a further improvement of the above technical solution, between step 3 and step 4, the static iron core sealing ring needs to be installed on the static iron core: check whether the static iron core made of SUS430 and can withstand the 48-hour smoke test is rusty or oxidized For unfavorable phenomena such as piercing, check whether the edge of the static iron core sealing ring made by SIL is pierced or damaged or broken; further insert the static iron core sealing ring into the corresponding slot of the static iron core.

The beneficial effects of the present invention are: the present invention provides a solenoid valve and its production process. The solenoid valve and its production process can effectively improve the scope of application of the miniature solenoid valve, greatly improve the convenience of use, and effectively improve the solenoid valve Its reliability and sealing performance further extend the service life of the solenoid valve.

In summary, the solenoid valve and its production process solve the technical defects of the prior art, such as small application range, inconvenience, poor reliability, short service life, and insufficient sealing performance.

Description of the drawings

The present invention will be further described below in conjunction with the drawings and embodiments.

Figure 1 is a schematic diagram of the assembly of the solenoid valve in embodiment 1 of the present invention;

Figure 2 is a schematic diagram of another angle of assembly of the solenoid valve in embodiment 1 of the present invention;

Figure 3 is a cross-sectional view in the direction of A-A in Figure 2;

Figure 4 is a schematic flow chart of the production process of the solenoid valve in Example 1 of the present invention

Figure 5 is a schematic diagram of the assembly of the solenoid valve in Embodiment 2 of the present invention;

Fig. 6 is a schematic diagram of another angle of assembly of the solenoid valve in embodiment 2 of the present invention;

Figure 7 is a cross-sectional view in the direction of B-B in Figure 6;

Figure 8 is a schematic diagram of the assembly of the solenoid valve in Embodiment 3 of the present invention;

Figure 9 is a schematic diagram of another angle of assembly of the solenoid valve in embodiment 3 of the present invention;

Figure 10 is a cross-sectional view in the direction of C-C in Figure 9;

Figure 11 is a schematic diagram of the assembly of the solenoid valve in Embodiment 4 of the present invention;

Figure 12 is a schematic view of another angle of assembly of the solenoid valve in embodiment 4 of the present invention;

Fig. 13 is a cross-sectional view in the direction of D-D in Fig. 12.

detailed description

In the following, the concept, specific structure and technical effects of the present invention will be clearly and completely described in conjunction with the embodiments and the drawings, so as to fully understand the purpose, features and effects of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, other embodiments obtained by those skilled in the art without creative work belong to The scope of protection of the present invention. In addition, all the connection/connection relationships involved in the patent do not only refer to the direct connection of the components, but refer to the fact that a better connection structure can be formed by adding or reducing connection accessories according to specific implementation conditions. The various technical features of the invention can be combined interactively under the premise of not contradicting each other, refer to Figs. 1-13.

Example 1, refer to Figures 1-4:

Specifically referring to Figures 1-3, a solenoid valve includes a sleeve 1 and a static iron core 2, a movable iron core 3 arranged inside the sleeve 1, and a pressure is provided between the static iron core 2 and the movable iron core 3 Spring 4, the upper part of the casing 1 is provided with a single-head valve body 5 that is sealed with the outer wall of the casing 1, the single-head valve body 5 is provided with a water inlet 51 and a water outlet 52, and the casing 1 is provided with The coil frame 61, the coil 62 is wrapped with a coil 62, the coil 62 is wrapped with an injection molding encapsulation layer 63, the injection molding encapsulation layer 63 is provided with a cage 7 outside, and the upper end of the moving iron core 3 A sealing head mounting groove 31 is provided in the sealing head mounting groove 31. The sealing head mounting groove 31 is provided with a sealing rubber head 32 matching it. The movable iron core 3 can drive the sealing rubber head 32 to move and control the water inlet 51 to communicate with the water outlet 52. Or partition.

In this embodiment, the water inlet 51 and the water outlet 52 are located on the same vertical plane in the vertical direction, the water outlet 52 is located above the water inlet 51, and the water inlet 51 and the water outlet 52 are located on the same side of the solenoid valve.

Preferably, a contact piece 64 is provided on the side of the injection molding encapsulation layer 63, the contact piece 64 and the injection molding encapsulation layer 63 are integrally connected by injection molding, and the contact piece 64 is injection molded inside the injection molding encapsulation layer 63 and the coil 62 is electrically connected, and the other end of the contact piece 64 is exposed to the outside of the injection molding encapsulation layer 63 and bent at 90° to form a coil terminal.

Preferably, the static iron core 2 and the moving iron core 3 are both soft magnetic cores, the sealing head mounting groove 31 is provided with a mounting groove snap ring at the slot position, and the sealing rubber head 32 is a conical cylindrical sealing rubber The sealant head 32 has a tapered bevel at one end, and the outer edge of the other end of the sealant head 32 is provided with a ring-shaped clamping position of the sealant head that matches the retaining ring of the mounting groove. The sealant head 32 is installed on the sealant head. After the groove 31, the installation groove snap ring is clamped on the rubber head ring clamp position.

Preferably, the single-head valve body 5 has a valve inner cavity 50 and a water inlet channel 53 and a water outlet channel 54 communicating with the valve body cavity 50. The movable iron core 3 can drive the sealant head 32 to move to the water outlet channel 54 The inlet and the water inlet channel 53 and the water outlet channel 54 are separated from each other. The water inlet 51 is arranged at the entrance of the water inlet channel 53 and the water outlet 52 is arranged at the outlet of the water outlet channel 54.

Preferably, a holder cover 71 is provided on the upper part of the holder 7, and the holder cover 71 is sleeved on the outer wall of the upper part of the sleeve 1.

Preferably, the upper outer wall of the static iron core 2 has a static iron core compression spring clamping position, the lower end outer wall of the movable iron core 3 has a movable iron core compression spring clamping position, and the lower end of the compression spring 4 is clamped on the static iron core 3 In the clamping position of the compression spring of the iron core, the upper end of the compression spring 4 is clamped on the clamping position of the compression spring of the moving iron core.

Preferably, a valve body sealing ring 81 is provided between the single-head valve body 5 and the outer wall of the sleeve 1, and a static iron core sealing ring 82 is provided between the inner wall of the sleeve 1 and the outer wall of the static iron core 2.

Preferably, the bottom of the holder 7 is provided with an iron core passing through hole, and the lower part of the static iron core 3 is provided with a static iron core annular clamping position which facilitates mutual positioning with the holder 7 and passes through the static iron core annular clamping position The iron core opened at the bottom of the cage 7 is clamped through the upper part of the through hole, and the lower end of the static iron core 2 passes through the iron core and passes through the through hole to be clamped with a clamp ring 9, and the upper wall of the clamp ring 9 abuts Lean against the lower wall of the holder 7.

Preferably, the sleeve 1 is a copper tube, the static iron core 2 and the moving iron core 3 are both SUS430 iron cores, the sealant head 32 is an EPDM sealant head, the holder 7SPCC plate, the holder 7 The surface is plated with a blue zinc layer, and the compression spring 4 is made of SUS304 spring steel.

Refer specifically to Figure 4,

Based on the above solenoid valve, the present invention also provides a solenoid valve production process, which is characterized in that it includes the following process steps:

Step 1: Make a semi-finished coil assembly, make a coil bobbin 61 and put a contact piece 64 on the coil bobbin 61, and then wind a coil 62 on the coil bobbin 61 with the contact piece 64 to form a semi-finished coil assembly;

Step 2: Coil encapsulation, the semi-finished coil component is sent to the matching design injection mold for injection encapsulation, after the injection encapsulation is completed, an injection encapsulation layer 63 is formed outside the coil 62 to obtain the finished coil component;

Step 3: Fold the terminal and use the terminal bending equipment to process the contact piece 6 that exposes the outside of the injection molding encapsulation layer 6 for bending processing. The bent contact piece 64 forms the coil terminal of the coil assembly, and the angle at which the contact piece 64 is bent Is 90°;

Step 4: Assemble the static iron core 2, the clamp ring 9 and the cage 7, put the clamp ring 9 and the cage 7 on the special clamp ring assembly jig, and then take the static iron core 2 and insert the corresponding inside the cage 7 After confirming that the static iron core 2 is in place, the clamp ring assembly jig pushes the clamp ring 9 into the corresponding clamping position in the static iron core 2 to complete the assembly process of the clamp ring 7;

Step 5: Assemble the sleeve 1, and wrap the sleeve 1 on the outer wall of the static iron core 2, and the inner wall of the sleeve 1 and the outer wall of the static iron core 2 are sealed and matched;

Step 6: Assemble the coil assembly with the sleeve 1, and put the finished coil assembly into the outside of the sleeve 1;

Step 7: Riveting the cage 7, put the cage 7 assembled with the coil assembly into a special riveting jig, and the riveting jig will riveting the cage cover 71 on the cage 7;

Step 8: Install the sealant head 32, compression spring 4 and moving iron core 3. First install the sealant head 32 in the sealant head installation groove 31 at the end of the moving iron core 3, and then install the compression spring 4 into the casing 1 Inside, finally install the movable iron core 3 with the sealant head 32 into the sleeve 1, and the compression spring 4 is located between the movable iron core 3 and the static iron core 2;

Step 9: Install the single-head valve body 5, assemble the single-head valve body 5 on the upper part of the holder 7 and fix the connection with screws;

Step 10: Performance test of solenoid valve.

Preferably, the solenoid valve performance test in step 10 includes:

Preferably, in step 1, the coil bobbin 7 made of PA66+25% GF is printed on an automatic contact sheet machine via a winding set to form a contact sheet 64 made of brass and nickel plated, and then automatically wound by automatic winding. Machine winding, butt welding, to make winding semi-finished products, namely semi-finished coil components;

In step two, the semi-finished coil component is sent to the designed mold for injection overmolding. The raw material of the injection overmolding layer 63: PA66 modified-YH630\UL94V-0, and the finished coil assembly is obtained after injection molding;

In step three, after checking the finished coil assembly, check whether the coil 62 in the coil assembly has any defects such as exposed copper, inconsistent terminal length or lack of glue, and then put it on the jig to confirm that it is in place, press the hand switch, Start the jig to bend the coil terminal to 90 degrees;

In step 4, check whether the cage 7 made of SPCC blue zinc plating and can withstand the 48-hour smoke test is rusted or oxidized, and then the retainer 7 is made of SUS304 and can withstand the 24-hour smoke test. 9 Place the holder 7 on the jig with the opening facing inward and the chamfered face up, and then place the holder 7 on the jig, and then put the static iron core 2 into the corresponding mounting hole of the holder 7, and press it with both hands after confirming that it is in place. Start the switch, the cylinder starts to push the clamp ring 9 into the slot of the static iron core;

In step 5, check whether the clamp ring 9 is in place and whether the clamp ring 9 is deformed; then twist one end of the bell mouth of the bushing 1 made of brass into the static iron core 2 by hand and connect it with the static iron core 2. Seal and cooperate, confirm whether the assembly is in place;

In step 6, check that the bell mouth end of the casing 1 covers the static iron core 2 and is installed on the bottom of the cage 7, and then the encapsulated coil assembly is sleeved into the casing 1, and the holder is made of SPCC blue zinc plating. The frame cover 71 is mounted on the top of the coil assembly with the chamfered surface facing upwards;

In step 7, put the coil assembly with the cage 7 and cage cover 71 on the riveting jig. After confirming the installation is in place, press the jig start switch with both hands, and the cylinder starts to rivet the cage 7 by punching the notch. , The gap of the cage 7 is punched in the middle, and the gap between the riveted cage 7 and the cage cover 71 cannot be greater than 0.2mm;

In step eight: check the sealant head 32 made of EPDM and the movable iron core 3 made of SUS430, put the sealant head 32 into the sealant head installation groove 31 of the movable iron core 3, and the sealant head 32 To be completely pressed into the sealant head installation groove 31, the sealant head 32 should be pressed flat on the end surface of the moving iron core 3; check that the compression spring 4 is made of SUS304 spring steel, and install the compression spring 4 into the inner sleeve 1 of the coil assembly , Check that the valve body sealing ring 81 made of EPDM cannot be flared or broken. Install the qualified valve body sealing ring 81 into the top outside of the casing 1 and ensure that the valve body sealing ring 81 is in close contact with the surface of the retainer 7. The movable iron core 3 is inserted into the sleeve 1 and placed in the blister tray.

Preferably, between step 3 and step 4, the static iron core sealing ring 82 needs to be installed on the static iron core 2: check whether the static iron core 2 made of SUS430 and can withstand the 48-hour smoke test is rusted, oxidized, or covered. For unfavorable phenomena such as sharp edges, check whether the edge of the static iron core sealing ring 82 made by SIL is flared or damaged or broken; further, the static iron core sealing ring 82 is inserted into the corresponding slot of the static iron core 2.

Embodiment 2, specifically refer to Figures 5-7.

This embodiment is basically the same as Embodiment 1, and the difference lies in:

Between the inner wall of the sleeve 1 and the outer wall of the moving iron core 3 is an outflow gap 11 communicating with the water inlet 51, and the static iron core 2 is provided with a static iron core outflow channel that penetrates up and down and communicates with the outflow gap 11 21. The lower end of the movable iron core 3 is provided with a second sealing groove installation groove 33, and the second sealing groove installation groove 33 is provided with a second sealant head 34, and the movable iron core 3 can drive the second seal The glue head 34 moves and closes the upper end entrance of the static iron core outflow channel 21; the second sealing head mounting groove 33 is provided with a second mounting groove snap ring at the slot position, and the second sealing glue head 34 is a cone A cylindrical sealant head, one end of the second sealant head 34 has a tapered bevel, and the outer edge of the other end of the second sealant head 34 is provided with a second rubber head annular clamping position matching the second mounting groove snap ring, so After the second sealant head 34 is installed in the second sealant head installation groove 33, the installation groove snap ring is clamped on the rubber head annular clamping position.

Embodiment 3, specifically refer to Figures 8-10.

This embodiment is basically the same as the first embodiment. The difference is that the water inlet 51 and the water outlet 52 are misaligned in the horizontal direction and form 225° with each other. The water inlet 51 and the water outlet 52 are respectively located on both sides of the solenoid valve. .

Embodiment 4, specifically refer to Figures 11-13.

This embodiment is basically the same as the second embodiment. The difference is that the water inlet 51 and the water outlet 52 are misaligned in the horizontal direction and form 225° with each other. The water inlet 51 and the water outlet 52 are respectively located on both sides of the solenoid valve. .

The above is a detailed description of the preferred implementation of the present invention, but the invention is not limited to the described embodiments. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present invention. These equivalent modifications or replacements are all included in the scope defined by the claims of this application.

Claims

A solenoid valve, characterized in that it comprises a sleeve (1) and a static iron core (2) and a moving iron core (3) arranged inside the sleeve (1), the static iron core (2) and the moving iron core (3) A compression spring (4) is arranged between the cores (3), the upper part of the sleeve (1) is provided with a single-head valve body (5) that is sealed with the outer wall of the sleeve (1), and the single-head valve body (5) A water inlet (51) and a water outlet (52) are provided on the casing (1), a coil bobbin (61) is provided outside the sleeve (1), and a coil (62) is wrapped on the coil bobbin (61), and the coil ( 62) An injection molding encapsulation layer (63) is externally wrapped, the injection molding encapsulation layer (63) is provided with a retainer (7), and the upper end of the moving iron core (3) is provided with a sealing head installation groove (31) ), the sealing head installation groove (31) is provided with a matching sealant head (32), and the movable iron core (3) can drive the sealant head (32) to move and control the water inlet (51) and the outlet The nozzle (52) is connected or cut off.
The solenoid valve according to claim 1, characterized in that: a contact piece (64) is provided on the side of the injection molding encapsulation layer (63), and the contact piece (64) is in contact with the injection molding encapsulation layer (63). Integrated injection molding connection, the part of the contact piece (64) injection molded inside the injection overmolding layer (63) is electrically connected to the coil (62), and the other end of the contact piece (64) is exposed outside the injection overmolding layer (63) And bend 90° to form a coil terminal;

The static iron core (2) and the moving iron core (3) are both soft magnetic cores, the sealing head mounting groove (31) is provided with a mounting groove snap ring at the slot position, and the sealing rubber head (32) is A conical cylindrical sealant head, one end of the sealant head (32) has a tapered slope, and the outer edge of the other end of the sealant head (32) is provided with a rubber head annular clamping position matching the mounting groove snap ring, and the seal After the rubber head (32) is installed in the sealing rubber head installation groove (31), the installation groove snap ring is clamped on the rubber head annular clamping position.
The solenoid valve according to claim 1, characterized in that: the single-head valve body (5) has a valve inner cavity (50) and a water inlet channel (53) communicating with the valve inner cavity (50), and a water outlet Channel (54), the movable iron core (3) can drive the sealant head (32) to move to the entrance of the water outlet channel (54) and isolate the water inlet channel (53) and the water outlet channel (54) from each other. The water inlet (51) is arranged at the entrance of the water inlet channel (53), and the water outlet (52) is arranged at the outlet of the water outlet channel (54);

The upper part of the holder (7) is provided with a holder cover (71), and the holder cover (71) is sleeved on the outer wall of the upper part of the sleeve (1).
The solenoid valve according to claim 1, characterized in that: the outer wall of the upper end of the static iron core (2) has a static iron core compression spring clamping position, and the outer wall of the lower end of the movable iron core (3) has a movable iron core pressure Spring clamping position, the lower end of the compression spring (4) is clamped on the static iron core compression spring clamping position, and the upper end of the compression spring (4) is clamped on the movable iron core compression spring clamping position;

A valve body sealing ring (81) is provided between the single-head valve body (5) and the outer wall of the sleeve (1), and a static iron is provided between the inner wall of the sleeve (1) and the outer wall of the static iron core (2) Core sealing ring (82).
The solenoid valve according to claim 1, characterized in that: the bottom of the holder (7) is provided with an iron core passing through hole, and the lower part of the static iron core (3) is provided with a convenient contact ) The static iron core annular clamping position positioned mutually and the iron core opened at the bottom of the cage (7) is clamped through the static iron core annular clamping position through the upper part of the through hole, and the lower end of the static iron core (2) passes through the upper part of the through hole. A clamp ring (9) is clamped after the iron core passes through the through hole, and the upper wall surface of the clamp ring (9) abuts against the lower wall surface of the holder (7);

The sleeve (1) is a copper tube, the static iron core (2) and the moving iron core (3) are both SUS430 iron cores, the sealant head (32) is an EPDM sealant head, and the cage (7) SPCC plate, the surface of the cage (7) is plated with a blue zinc layer, and the compression spring (4) is made of SUS304 spring steel.
The solenoid valve according to claim 1, characterized in that: between the inner wall of the sleeve (1) and the outer wall of the moving iron core (3) there is an outflow gap (11) communicating with the water inlet (51) The static iron core (2) is provided with a static iron core outflow channel (21) that penetrates up and down and communicates with the outflow gap (11), and the lower end of the movable iron core (3) is provided with a second sealing groove installation groove (33), a second sealant head (34) is arranged in the second seal groove installation groove (33), and the movable iron core (3) can drive the second sealant head (34) to move and move the static iron The upper entrance of the core outflow channel (21) is closed;

The second sealing head mounting groove (33) is provided with a second mounting groove snap ring at the slot position, the second sealing rubber head (34) is a conical cylindrical sealing rubber head, and the second sealing rubber head (34) One end of the second sealant head (34) has a tapered slope, and the outer edge of the other end of the second sealant head (34) is provided with a second sealant head ring-shaped clamping position matching the second mounting groove snap ring, and the second sealant head (34) After being installed in the second sealing rubber head installation groove (33), the installation groove snap ring is clamped on the rubber head annular clamping position.
A production process of a solenoid valve is characterized in that it includes the following process steps:

Step 1: Making the semi-finished product of the coil assembly, making the coil bobbin (61) and marking the contact piece (64) on the coil bobbin (61), and then winding the coil (62) on the coil bobbin (61) with the contact piece (64) , Forming a semi-finished coil assembly;

Step 2: Coil encapsulation, sending the semi-finished coil component into a matching design injection mold for injection encapsulation. After the injection encapsulation is completed, an injection molding encapsulation layer (63) is formed outside the coil (62) to obtain a finished coil component;

Step 3: Fold the terminal and use the terminal bending equipment to process the contact piece (6) to expose the outside of the injection molding encapsulation layer (6) for bending treatment. The bent contact piece (64) forms the coil terminal of the coil assembly and contacts The bending angle of the sheet (64) is 90°;

Step 4: Assemble the static iron core (2), the clamp ring (9) and the cage (7), place the clamp ring (9) and the cage (7) on the special clamp ring assembly jig, and then take the static iron The core (2) is inserted into the corresponding mounting hole inside the cage (7). After the static iron core (2) is confirmed to be in place, the clamp ring assembly jig pushes the clamp ring (9) into the corresponding clamp in the static iron core (2) Position to complete the assembly process of the clamp ring (7);

Step 5: Assemble the sleeve (1), wrap the sleeve (1) on the outer wall of the static iron core (2), and seal the inner wall of the sleeve (1) with the outer wall of the static iron core (2);

Step 6: Assemble the coil component and the sleeve (1), and put the finished coil component into the outside of the sleeve (1);

Step 7: Riveting the cage (7), place the cage (7) assembled with the coil assembly into a special riveting jig, and the riveting jig will riveting the cage cover (71) to the cage (7) )on;

Step 8: Install the sealant head (32), compression spring (4) and moving iron core (3), first install the sealant head (32) in the sealant head installation groove (31) at the end of the moving iron core (3) ), then install the compression spring (4) into the casing (1), and finally install the movable iron core (3) with the sealant head (32) into the casing (1), and the compression spring (4) ) Is located between the moving iron core (3) and the static iron core (2);

Step 9: Install the single-head valve body (5), assemble the single-head valve body (5) on the upper part of the holder (7) and fix the connection with screws;

Step 10: Performance test of solenoid valve.
The manufacturing process of a solenoid valve according to claim 7, wherein the performance test of the solenoid valve in the tenth step comprises:

For high voltage test, put the screwed solenoid valve product on the test rack, and then press the start switch to start the test. If the pressure is leaking, the device will alarm. If the alarm is detected, take it out and make a mark. This is a defective product. ；

2.5Bar pressure holding test, put the finished solenoid valve on the test rack, press the start switch, start to input 2.5Bar air pressure after power on, then power off and hold the pressure for 10 seconds, the sink leakage cannot be lower than 2.47Bar during the pressure hold, the test is complete After reading the display screen result, the qualified product is taken out and transferred to the next process, and the defective product corresponding to the test head is taken out and marked and placed in the defective plate;

For flow test, put the finished solenoid valve on the test rack and press the start switch. At this time, the coil is energized, and the water inlet end must be filled with water. After the power is off, the outlet end cannot flow out, and it can be automatically closed. Read after the test is completed The test results of the display screen, the qualified products are taken out and transferred to the next process, and the defective products corresponding to the test head are taken out and marked and placed in the defective product tray. The two outlet ports cannot discharge water at the same time, and the ones that cannot be switched on and off freely are defective products. The test water should be replaced every four hours and the water replacement record should be made;

2Bar on and off, low pressure start test: 1. Put the product on the test rack and press the start switch. At this time, the valve cannot be energized, and the water should be supplied first; 2. When the coil is not energized, when the pressure increases to 2.0-2.3Bar After that, the valve should be able to make and break freely; 3. When the valve is working, after adding a back pressure of 2.0-2.3 Bar at the water outlet, the valve should have a free on and off function.
The production process of a solenoid valve according to claim 7, characterized in that: in step 1, a coil bobbin (7) made of PA66+25% GF is placed on an automatic contact sheet machine via a winding set A contact piece (64) made of nickel-plated brass is marked, and then wound by an automatic winding machine, butt-welded to make the winding semi-finished product, that is, the semi-finished coil component;

In step 2, the semi-finished coil component is sent to the designed mold for injection overmolding. The raw material of the injection overmolding layer (63): PA66 modified-YH630\UL94V-0. After injection molding, the finished coil assembly is obtained;

In step three, check if the coil (62) in the coil assembly is exposed to copper, the length of the terminal is inconsistent or lack of glue, and then put it on the jig to confirm that it is installed in place, and then press the hand button. Switch, start the jig to bend the coil terminal to 90 degrees;

In step four, check whether the cage (7) made of SPCC blue zinc-plated material and can withstand the 48-hour smoke test is rusted or oxidized. After that, it will be made of SUS304 material and can withstand the 24-hour smoke test. The ring (9) is placed on the jig with the opening facing inward and the chamfered side is facing upwards, and the holder (7) is also placed on the jig, and then the static iron core (2) is sleeved into the holder (7) for the corresponding installation In the hole, after confirming that it is in place, press the start switch with both hands, and the cylinder starts to push the clamp ring (9) into the slot of the static iron core;

In step 5, check whether the clamp ring (9) is stuck in place and whether the clamp ring (9) is deformed; then, twist one end of the bell mouth of the bushing (1) made of brass by hand to the static iron core (2) ) And seal with the static iron core (2) to confirm whether the assembly is in place;

In step 6, check that the bell mouth end of the sleeve (1) covers the static iron core (2) and installs it on the bottom of the holder (7), then sleeve the rubberized coil assembly into the sleeve (1), take it The cage cover (71) made of SPCC blue zinc plating is installed on the top of the coil assembly with the chamfered surface facing upward;

In step 7, put the coil assembly with the cage (7) and cage cover (71) on the riveting tool. After confirming that it is installed in place, press the jig start switch with both hands, and the cylinder starts to turn the cage ( 7) The notch is riveted tightly, the notch of the cage (7) is punched in the middle, and the gap between the rivetted cage (7) and the cage cover (71) cannot be greater than 0.2mm;

In step eight: check the sealant head (32) made of EPDM and the movable iron core (3) made of SUS430, and install the sealant head (32) into the sealant head of the movable iron core (3) In the groove (31), the sealant head (32) must be completely pressed into the sealant head installation groove (31), and the sealant head (32) must be flattened on the end face of the movable iron core (3); inspection is made of SUS304 spring steel Form the compression spring (4), insert the compression spring (4) into the inner sleeve (1) of the coil assembly, check that the valve body sealing ring (81) made of EPDM cannot be flared or broken, and the qualified valve body Insert the sealing ring (81) into the top outside of the casing (1) and make sure that the valve body sealing ring (81) is in close contact with the surface of the cage (7). Put the moving iron core (3) into the casing (1) and place it inside the casing (1). Inside the blister tray.
The production process of a solenoid valve according to claim 7, characterized in that: between step 3 and step 4, a static iron core sealing ring (82) needs to be installed on the static iron core (2): check that it is made of SUS430 And whether the static iron core (2) that can withstand the 48-hour smoke test is rusty, oxidized, or flared, check whether the edge of the static iron core sealing ring (82) made by SIL is flared or damaged or broken; The static iron core sealing ring (82) is further sleeved into the corresponding slot of the static iron core (2).