Electromagnetic valve with novel filter screen structure

Abstract

The utility model discloses a novel electromagnetic valve with a filter screen structure, which comprises a valve body with an inlet flow channel and an outlet flow channel, a water retaining disc component arranged in the valve body and matched with the valve body to form a seal, and an electromagnetic driving component arranged at the upper end of the valve body and used for driving the water retaining disc component to move, an annular flow channel communicated with the inlet flow channel is formed in the position, corresponding to the periphery of the annular partition plate, of the inner cavity of the valve body. A middle flow channel communicated with the outlet flow channel is formed in the position, corresponding to the interior of the annular partition plate, of the inner cavity of the valve body. A filter screen is installed in the annular flow channel, and a plurality of filter holes are formed in the surface of the filter screen. On the basis that a good filtering effect is achieved, flow attenuation can be reduced, blocking can be prevented, and the service life of the valve can be prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to valve technical field, especially a kind of electromagnetic valve of novel filter screen structure. BACKGROUND

[0002] Due to the development of valve technology, electromagnetic valve is widely used in pipeline, however, many water pipes are aging now, water resources are also polluted, and large particle impurities such as rust and red worms appear, which not only affects water quality, but also easily leads to electromagnetic valve wear, poor sealing, short service life and other conditions. In order to solve the above problems in the market today, the conventional method has the following two schemes: one is to increase a cylindrical filter screen at the water inlet of the electromagnetic valve body, which has good filtering effect, but has the problem of large water flow speed limit and easy blockage; the second is to set a semicircular filter screen at the inner end of the water inlet of the electromagnetic valve body, which increases the filtering area and improves the water flow restriction and blockage problem, but at the moment when the electromagnetic valve is opened each time, the water flow from bottom to top has a certain impact force on the filter screen, which may cause the risk of displacement of the filter screen. SUMMARY

[0003] The utility model aims at providing a kind of electromagnetic valve of novel filter screen structure, which can not only reduce flow decay and prevent blockage, but also increase the service life of the valve based on good filtering effect.

[0004] To achieve the above object, the utility model provides the following technical scheme: a kind of electromagnetic valve of novel filter screen structure, including the valve body with import flow channel and export flow channel, the water baffle assembly of setting in valve body and being cooperated with valve body to form sealing and the electromagnetic drive assembly of being used for driving water baffle assembly to move and being set on the upper end of valve body, the annular partition is equipped in the valve body, the part of the valve body cavity corresponding to the periphery of annular partition forms an annular flow channel connected with import flow channel, and the part of the valve body cavity corresponding to the inside of annular partition forms a middle flow channel connected with export flow channel;Filter screen is installed in annular flow channel in the import flow channel, and the surface of filter screen is provided with a plurality of filter holes.

[0005] By adopting the above technical scheme, the filter screen in the shape of circular ring is arranged in the annular flow channel at the inner end of the import flow channel, the filter holes are distributed on the entire filter surface, the filtering area is large, the flow decay can be reduced, and the more the number of filter holes is, the more the blockage can be prevented, and the service life of the valve is increased.

[0006] The utility model is further provided with support steps in the shape of annular on the inner wall of the valve body, when the electromagnetic drive assembly is installed on the upper end of the valve body, the electromagnetic drive assembly applies downward force to the water baffle assembly, and the edge of the filter screen is pressed on the support steps by the water baffle assembly.

[0007] By adopting the technical scheme, the electromagnetic driving assembly presses the water baffle assembly and the filter screen on the support step in the valve body, the installation structure is simple and reliable, and the stability of the filter screen installation can be ensured.

[0008] The utility model further sets up, the electromagnetic drive assembly includes coil holder, coil of winding in coil holder, set up in the valve core sleeve of coil holder center and bottom extension to the valve core in the valve body, the valve core is set up in the valve core sleeve along the axial activity, and the valve core and the spring for the valve core are set up in the valve core sleeve and are used to the spring that adds downward pre -tightening force, the water baffle assembly includes diaphragm and installs the water baffle of diaphragm, the coil holder is connected together with the upper end of valve body through fastener, promotes the valve core sleeve lower end to press the diaphragm and the filter screen edge on the support step.

[0009] By adopting the technical scheme, the electromagnetic driving assembly, the water baffle assembly and the specific installation mode of filter screen are that the valve core sleeve presses the water baffle assembly and the filter screen on the support step in the valve body, and is locked by fastener (screw), and the stability of filter screen is guaranteed.

[0010] The utility model further sets up, the annular positioning groove is equipped on the upper end of filter screen, and the edge of diaphragm is embedded in the annular positioning groove.

[0011] By adopting the technical scheme, the edge of diaphragm is positioned in the annular positioning groove on the upper end of filter screen, and the stability of the cooperation of both can be further improved.

[0012] The utility model further sets up, the outer periphery of filter screen is closely combined with the inner wall of valve body, and the inner periphery of filter screen is closely combined with the outer periphery of annular partition.

[0013] By adopting the technical scheme, not only installation stability is good, but also the cooperation is closely, and the filtering effect can be improved.

[0014] The utility model further sets up, and the sealing ring is clamped between filter screen and support step.

[0015] By adopting the technical scheme, the filter screen cooperates with the sealing ring (O type ring), forms radial seal on the valve body, and prevents water from leaking from the side of valve body.

[0016] The utility model further sets up, and the annular sealing groove is equipped at the outer edge of lower end of filter screen, the support step, the inner wall of valve body and annular sealing groove form an annular sealing cavity, and the sealing ring is set up in the annular sealing cavity.

[0017] By adopting the technical scheme, when the sealing ring is stressed and deformed, can be tightly against each surface in annular sealing cavity, thereby forming good seal.

[0018] The utility model further sets up, the filter screen bottom is equipped with the annular positioning convex part of the section is tapered, be equipped with the annular positioning recess on the support step with the annular positioning convex part, the lower edge of filter screen periphery still is equipped with the first tapered positioning surface, be equipped with the second tapered positioning surface with the first tapered positioning surface of the valve body inner wall, the annular positioning recess and second tapered positioning surface concentricity setting.

[0019] By adopting above-mentioned technical scheme, not only convenient for the installation of filter screen, but also can to filter screen play good positioning effect, further improve the stability of filter screen installation.

[0020] The utility model further sets up, the filter screen upper end is equipped with the annular support part of extending upwards in the position close to the outer edge, when the water baffle assembly and annular baffle upper end abut tightly, the filter screen and diaphragm between be equipped with annular partition cavity.

[0021] By adopting above-mentioned technical scheme, the part with filter hole of filter screen is separated from diaphragm, not only can guarantee that diaphragm can significantly reduce flow attenuation, but also can play the role of protecting diaphragm, improve the service life of valve. DRAWINGS

[0022] Figure 1 It is the overall structural schematic drawing of the utility model;

[0023] Figure 2 It is the overall sectional view of the utility model;

[0024] Figure 3 It is the explosion drawing of the utility model;

[0025] Figure 4 It is the structural schematic drawing of filter screen of the utility model.

[0026] In the drawing: 1, import flow channel;2, export flow channel;3, valve body;4, water baffle assembly;5, electromagnetic drive assembly;6, annular baffle;7, annular flow channel;8, middle flow channel;9, filter screen;10, filter hole;11, support step;12, coil holder;13, coil;14, valve core cover;15, valve core;16, spring;17, diaphragm;18, water baffle;19, annular positioning groove;20, sealing ring;21, annular sealing groove;22, annular sealing cavity;23, annular positioning convex part;24, annular positioning recess;25, first tapered positioning surface;26, second tapered positioning surface;27, annular support part;28, annular partition cavity. CONCRETE IMPLEMENTATION

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] Example: As attached Figures 1 to 4 The solenoid valve, as shown, features a novel filter structure and includes a valve body 3 with an inlet channel 1 and an outlet channel 2, a baffle plate assembly 4 disposed within the valve body 3 and forming a seal with the valve body 3, and an electromagnetic drive assembly 5 disposed at the upper end of the valve body 3 for driving the movement of the baffle plate assembly 4. The valve body 3 contains an annular baffle plate 6, which is integral with the valve body 3. The inner cavity of the valve body 3 forms an annular channel 7 corresponding to the periphery of the annular baffle plate 6, communicating with the inlet channel 1. The inner cavity of the valve body 3 forms a middle channel 8 corresponding to the inner portion of the annular baffle plate 6, communicating with the outlet channel 2. When the electromagnetic drive assembly 5 causes the baffle plate assembly 4 to descend and press against the annular baffle plate 6, the solenoid valve closes. When the electromagnetic drive assembly 5 moves away from the baffle plate assembly 4, the baffle plate assembly 4 moves upward under the push of the upstream medium, and the solenoid valve opens. A filter screen 9 is installed in the annular channel 7. The filter screen 9 may be made of POM material, and its surface has multiple filter holes 10. A circular filter screen 9 is installed in the annular flow channel 7 at the inner end of the inlet flow channel 1. The filter holes 10 cover the entire filter surface, resulting in a large filter area, which can reduce flow attenuation. Furthermore, the more filter holes there are, the better the valve can prevent clogging and extend its service life.

[0029] As attached Figure 2 As shown, the valve body 3 has an annular support step 11 on its inner wall. When the electromagnetic drive assembly 5 is installed on the upper end of the valve body 3, it applies a downward force to the baffle plate assembly 4, which presses the edge of the filter screen 9 onto the support step 11. The electromagnetic drive assembly 5 presses the baffle plate assembly 4 and the filter screen 9 onto the support step 11 inside the valve body 3. The installation structure is simple and reliable, ensuring the stability of the filter screen 9 installation.

[0030] As attached Figure 2As shown, the electromagnetic drive assembly 5 includes a coil holder 12, a coil 13 wound on the coil holder 12, a valve core sleeve 14 arranged at the center of the coil holder 12 and extending to the bottom of the valve body 3, a valve core 15 movably arranged in the valve core sleeve 14 in the axial direction, and a spring 16 arranged in the valve core sleeve 14 for applying a downward pre-tightening force to the valve core 15; the water baffle assembly 4 includes a diaphragm 17 and a water baffle 18 mounted on the diaphragm 17; the coil holder 12 is connected with the upper end of the valve body 3 by a fastener, so that the lower end of the valve core sleeve 14 presses the diaphragm 17 and the edge of the filter screen 9 tightly on the support step 11. This is a specific mounting mode of the electromagnetic drive assembly 5, the water baffle assembly 4 and the filter screen 9, that is, the valve core sleeve 14 presses the water baffle assembly 4 and the filter screen 9 tightly on the support step 11 in the valve body 3, and is locked by the fastener (screw), thereby ensuring the stability of the filter screen 9.

[0031] As shown in the accompanying drawings, Figure 2 As shown, the upper end of the filter screen 9 is provided with an annular positioning groove 19, and the edge of the diaphragm 17 is embedded in the annular positioning groove 19, that is, during assembly, the bottom end of the valve core sleeve 14 presses the edge of the diaphragm 17 into the annular positioning groove 19. Positioning the edge of the diaphragm 17 in the annular positioning groove 19 at the upper end of the filter screen 9 can further improve the stability of the cooperation between the diaphragm 17 and the filter screen 9.

[0032] As shown in the accompanying drawings, Figure 2 As shown, the outer periphery of the filter screen 9 is tightly attached to the inner wall of the valve body 3, and the inner periphery of the filter screen 9 is tightly attached to the outer periphery of the annular partition plate 6. It not only has good installation stability, but also has tight cooperation to improve the filtering effect.

[0033] As shown in the accompanying drawings, Figure 2 As shown, a sealing ring 20 is arranged between the filter screen 9 and the support step 11. The filter screen 9 cooperates with the sealing ring 20 (O-ring) to form a radial seal on the valve body 3, thereby preventing water leakage from the side of the valve body 3.

[0034] As shown in the accompanying drawings, Figure 2 As shown, the outer edge of the lower end of the filter screen 9 is provided with an annular sealing groove 21, and the support step 11, the inner wall of the valve body 3 and the annular sealing groove 21 form an annular sealing cavity 22, and the sealing ring 20 is arranged in the annular sealing cavity 22. When the sealing ring 20 is deformed under force, it will tightly abut against each surface in the annular sealing cavity 22, thereby forming a good seal.

[0035] As shown in the accompanying drawings, Figure 2As shown, the filter screen 9 is provided with a ring-shaped positioning protrusion 23 with a tapered cross section at the bottom, the support step 11 is provided with a ring-shaped positioning recess 24 matching the ring-shaped positioning protrusion 23, and the lower edge of the outer periphery of the filter screen 9 is further provided with a first tapered positioning surface 25, and the inner wall of the valve body 3 is provided with a second tapered positioning surface 26 matching the first tapered positioning surface 25, and the ring-shaped positioning recess 24 and the second tapered positioning surface 26 are concentrically arranged, that is, the center lines of the ring-shaped positioning recess 24 and the second tapered positioning surface 26 coincide. This design not only facilitates the installation of the filter screen 9, but also has a good positioning effect on the filter screen 9, further improving the stability of the installation of the filter screen 9.

[0036] As shown in the accompanying drawings, Figure 2 As shown, the filter screen 9 is provided with a ring-shaped positioning protrusion 23 with a tapered cross section at the bottom, the support step 11 is provided with a ring-shaped positioning recess 24 matching the ring-shaped positioning protrusion 23, and the lower edge of the outer periphery of the filter screen 9 is further provided with a first tapered positioning surface 25, and the inner wall of the valve body 3 is provided with a second tapered positioning surface 26 matching the first tapered positioning surface 25, and the ring-shaped positioning recess 24 and the second tapered positioning surface 26 are concentrically arranged, that is, the center lines of the ring-shaped positioning recess 24 and the second tapered positioning surface 26 coincide. This design not only facilitates the installation of the filter screen 9, but also has a good positioning effect on the filter screen 9, further improving the stability of the installation of the filter screen 9. As shown, the filter screen 9 is provided with a ring-shaped positioning protrusion 23 with a tapered cross section at the bottom, the support step 11 is provided with a ring-shaped positioning recess 24 matching the ring-shaped positioning protrusion 23, and the lower edge of the outer periphery of the filter screen 9 is further provided with a first tapered positioning surface 25, and the inner wall of the valve body 3 is provided with a second tapered positioning surface 26 matching the first tapered positioning surface 25, and the ring-shaped positioning recess 24 and the second tapered positioning surface 26 are concentrically arranged, that is, the center lines of the ring-shaped positioning recess 24 and the second tapered positioning surface 26 coincide. This design not only facilitates the installation of the filter screen 9, but also has a good positioning effect on the filter screen 9, further improving the stability of the installation of the filter screen 9.

Claims

1. A new type of electromagnetic valve with filter screen structure, comprising a valve body (3) with an inlet flow channel (1) and an outlet flow channel (2), a water baffle assembly (4) arranged in the valve body (3) and cooperating with the valve body (3) to form a seal, and an electromagnetic drive assembly (5) arranged at the upper end of the valve body (3) for driving the water baffle assembly (4) to move, wherein an annular partition plate (6) is arranged in the valve body (3), the inner cavity of the valve body (3) corresponds to the outer periphery of the annular partition plate (6) to form an annular flow channel (7) connected with the inlet flow channel (1), and the inner cavity of the valve body (3) corresponds to the inner part of the annular partition plate (6) to form a middle flow channel (8) connected with the outlet flow channel (2); characterized in that: The annular flow channel (7) is provided with a filter screen (9) having a plurality of filter holes (10) on the surface thereof; the inner wall of the valve body (3) is provided with an annular support step (11), and the electromagnetic drive assembly (5) is installed on the upper end of the valve body (3), and the electromagnetic drive assembly (5) applies a downward force to the water baffle assembly (4), and the water baffle assembly (4) presses the edge of the filter screen (9) against the support step (11).

2. A solenoid valve of a new filter screen structure according to claim 1, characterized in that: The electromagnetic drive assembly (5) comprises a coil holder (12), a coil (13) wound on the coil holder (12), a valve core sleeve (14) arranged at the center of the coil holder (12) and extending to the bottom of the valve body (3), a valve core (15) movably arranged in the valve core sleeve (14) in the axial direction, and a spring (16) arranged in the valve core sleeve (14) for applying a downward pre-tightening force to the valve core (15); the water baffle assembly (4) comprises a diaphragm (17) and a water baffle (18) installed on the diaphragm (17); the coil holder (12) is connected to the upper end of the valve body (3) by a fastener, so that the lower end of the valve core sleeve (14) presses the diaphragm (17) and the edge of the filter screen (9) against the support step (11).

3. The solenoid valve of claim 2, wherein: The upper end of the filter screen (9) is provided with an annular positioning groove (19), and the edge of the diaphragm (17) is embedded in the annular positioning groove (19).

4. The solenoid valve of claim 1, wherein: The outer periphery of the filter screen (9) is tightly attached to the inner wall of the valve body (3), and the inner periphery of the filter screen (9) is tightly attached to the outer periphery of the annular partition plate (6).

5. The solenoid valve of claim 4, wherein: A sealing ring (20) is arranged between the filter screen (9) and the support step (11).

6. A solenoid valve of the novel filter screen structure according to claim 5, characterized in that: The outer edge of the lower end of the filter screen (9) is provided with an annular sealing groove (21), and the support step (11), the inner wall of the valve body (3) and the annular sealing groove (21) form an annular sealing cavity (22), and the sealing ring (20) is arranged in the annular sealing cavity (22).

7. The solenoid valve of claim 6, wherein: The bottom of the filter screen (9) is provided with an annular positioning protrusion (23) with a tapered cross section, the support step (11) is provided with an annular positioning recess (24) matching the annular positioning protrusion (23), the lower edge of the outer periphery of the filter screen (9) is further provided with a first tapered positioning surface (25), the inner wall of the valve body (3) is provided with a second tapered positioning surface (26) matching the first tapered positioning surface (25), and the annular positioning recess (24) and the second tapered positioning surface (26) are arranged concentrically.

8. The solenoid valve of claim 2, wherein: The upper end of the filter screen (9) is provided with an annular support portion (27) extending upward near the outer edge, and when the water baffle assembly (4) abuts against the upper end of the annular partition plate (6), an annular partition cavity (28) is formed between the filter screen (9) and the diaphragm (17).

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