Diaphragm sealing structure of valve element

Abstract

The utility model discloses a diaphragm sealing structure of a valve core, which comprises a valve seat provided with an accommodating cavity, a working port and a flow channel; the working port is located below the containing cavity and communicated with the containing cavity, and the flow channel is communicated with the containing cavity. The valve element is arranged in the containing cavity, and the valve element can move up and down so as to have the position where the working opening can be opened or closed. The elastic diaphragm is located above the containing cavity, the inner end of the elastic diaphragm is connected with the peripheral side of the valve element in a sealed mode, the outer end of the elastic diaphragm is connected with the valve seat in a sealed mode, the elastic diaphragm can elastically deform to move along with the valve element, and the sealing effect is always kept. The utility model relates to the technical field of electromagnetic valves.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of electromagnetic valve, more exactly relates to a diaphragm seal structure of valve core. BACKGROUND

[0002] The electromagnetic valve is one of the indispensable components of automobile products, and its main function is to realize the on-off function of the pipeline.

[0003] The valve core is generally connected with the moving iron core of the electromagnetic assembly by a guide rod, and the existing electromagnetic valve drives the valve core to move to adjust the opening degree of the working port when the electromagnetic assembly is powered on,

[0004] When power is off, the reset spring can drive the valve core to reset.

[0005] A plastic guide ring needs to be arranged on the valve body, the inner hole of the guide ring is sleeved on the guide rod, and the outer side is fitted on the valve body, the guide ring plays a guiding and sealing role on the guide rod,

[0006] If the sealing performance needs to be improved, the inner hole of the guide ring needs to be reduced, but during operation, the guide ring and the guide rod are prone to jamming, which reduces the stability of the valve core operation;

[0007] If the guiding performance needs to be improved, the inner hole of the guide ring needs to be increased, but after the inner hole is increased, the sealing performance will be reduced, and air leakage is prone to occur. INVENTION CONTENTS

[0008] In view of the deficiencies and defects of the prior art, a diaphragm seal structure with compact structure, good sealing performance and stable and reliable operation is provided.

[0009] A diaphragm seal structure of a valve core, comprising:

[0010] A valve seat is provided with a containing cavity, a working port, and a flow channel;

[0011] The working port is located below the containing cavity and is in communication with the containing cavity, and the flow channel is in communication with the containing cavity;

[0012] A valve core is arranged in the containing cavity, and the valve core can move up and down to have a position of opening or closing the working port;

[0013] An elastic diaphragm is located above the containing cavity, and the inner end is connected with the peripheral side of the valve core in a sealed manner, and the outer end is connected with the valve seat in a sealed manner,

[0014] The elastic diaphragm can elastically deform to accompany the movement of the valve core and always maintain the sealing effect.

[0015] After the above structure is adopted, the diaphragm seal structure of the valve core of the utility model has the following advantages compared with the prior art:

[0016] The valve core moves downward to close the working port, at this time, the working port is cut off from the flow channel, and the medium cannot pass through;

[0017] The valve core moves upward to open the working port, at this time, the working port is communicated with the flow channel, and the medium can pass through.

[0018] An elastic diaphragm is arranged between the valve seat and the valve core, an effective seal is formed between the valve core and the valve seat above the accommodating cavity, the medium in the accommodating cavity is prevented from leaking out, and meanwhile, the normal communication of the working port, the accommodating cavity and the flow channel is not affected,

[0019] The elastic diaphragm elastically deforms when the valve core reciprocates, so as to follow the position change of the valve core, and the elastic diaphragm can always maintain the sealing effect, so that the device operates reliably.

[0020] As an improvement of the utility model, the upper and lower sides of the inner end of the elastic diaphragm are respectively provided with first clamping blocks, and the upper and lower sides of the outer end are respectively provided with second clamping blocks;

[0021] The valve core is provided with a first engagement groove for engaging the first clamping block, and the valve seat is provided with a second engagement groove for engaging the second clamping block.

[0022] As an improvement of the utility model, an upward extending connecting portion is arranged above the valve seat, and the outer periphery of the connecting portion is engaged and connected below a connecting seat;

[0023] An inward extending flange is formed in the inner side of the connecting portion, a limiting protrusion extending upward is arranged above the flange, and a first clamping groove is formed between the inner side of the connecting portion and the limiting protrusion;

[0024] The accommodating cavity is arranged to penetrate through the valve seat;

[0025] The connecting seat is provided with a matching hole communicating with the accommodating cavity in the upper and lower directions;

[0026] The connecting seat is provided with a second clamping groove opposite to the first clamping groove;

[0027] The second clamping groove and the first clamping groove form the first engagement groove after being combined.

[0028] As an improvement of the utility model, the valve core is provided with a center hole, a guide rod is inserted into the center hole, the guide rod is connected with the output end of a driving assembly, and the driving assembly drives the valve core to move upward and downward through the guide rod.

[0029] As an improvement of the utility model, an extending portion extending outward is arranged on the peripheral side of the guide rod, and a third clamping groove is formed below the extending portion;

[0030] The valve core is provided with a fourth clamping groove opposite to the third clamping groove, and the fourth clamping groove and the third clamping groove combine to form the second matching groove.

[0031] As an improvement of the utility model, a supporting groove is formed between the inner side of the limiting protrusion and the inner side of the connecting part,

[0032] A supporting washer is connected in the supporting groove, the supporting washer is supported at the lower part of the elastic diaphragm, and the inner diameter of the supporting washer is the same as the inner diameter of the matching hole.

[0033] As an improvement of the utility model, a convex ring is arranged around the working port above the working port, the valve core bottom is coated with a rubber coating, a ring groove is arranged at the position corresponding to the convex ring at the bottom of the rubber coating, the valve core can be moved downward to open the working port, and the ring groove and the convex ring are in a matching state. BRIEF DESCRIPTION OF DRAWINGS

[0034] Figure 1 It is a structural schematic view of the utility model.

[0035] Figure 2 It is a sectional view schematic view when the valve core of the utility model is moved to the closed working port.

[0036] Figure 3 It is a sectional view schematic view when the valve core of the utility model is moved to the closed working port. Figure 2 It is an enlarged schematic view of the structure of A in the utility model.

[0037] Figure 4 It is a structural schematic view of the bottom of the rubber coating of the utility model.

[0038] Figure 5 It is a sectional view schematic view when the electromagnetic driving assembly is used as a power source and drives the valve core to close the working port of the utility model.

[0039] Figure 6 It is a sectional view schematic view when the electromagnetic driving assembly is used as a power source and drives the valve core to close the working port of the utility model. Figure 5 It is a sectional view schematic view when the electromagnetic driving assembly is used as a power source and drives the valve core to close the working port of the utility model.

[0040] Figure 7 It is an enlarged schematic view of the structure of B in the utility model.

[0041] As shown in the figure: 1, valve seat; 1.1, accommodating cavity; 1.2, working port; 1.21, convex ring; 1.3, flow channel; 2, valve core; 2.1, fourth clamping groove; 2.2, encapsulation; 2.21, ring groove; 3, elastic diaphragm; 3.1, first clamping block; 3.2, second clamping block; 4, connecting part; 4.1, flange; 4.11, limiting protrusion; 4.111, first clamping groove; 4.112, supporting groove; 5, connecting seat; 5.1, second clamping groove; 6, guide rod; 6.1, extension; 6.11, third clamping groove; 7, supporting washer; 8, moving iron core; 9, coil former; 9.1, coil; 10, spring. DETAILED DESCRIPTION

[0042] The utility model will be further described below in combination with the drawings and specific embodiments.

[0043] Please refer to Figures 1-7 As shown in the figure, a diaphragm sealing structure of a valve core comprises:

[0044] Valve seat 1, valve seat 1 is provided with accommodating cavity 1.1, working port 1.2 and flow channel 1.3;

[0045] Working port 1.2 is located below accommodating cavity 1.1 and is communicated with accommodating cavity 1.1, and flow channel 1.3 is communicated with accommodating cavity 1.1;

[0046] Valve core 2, valve core 2 is placed in accommodating cavity 1.1, and valve core 2 can be moved up and down to have a position of opening or closing working port 1.2;

[0047] Elastic diaphragm 3, elastic diaphragm 3 is located above accommodating cavity 1.1, and the inner end is connected with the circumferential side of valve core 2 in a sealed manner, and the outer end is connected with valve seat 1 in a sealed manner,

[0048] Elastic diaphragm 3 can be elastically deformed to accompany the movement of valve core 2 and always keep the sealing effect.

[0049] Valve core 2 moves downward to close working port 1.2, at this time, working port 1.2 is cut off from flow channel 1.3, and the medium cannot pass through;

[0050] Valve core 2 moves upward to open working port 1.2, at this time, working port 1.2 is communicated with flow channel 1.3, and the medium can pass through.

[0051] Elastic diaphragm 3 is arranged between valve seat 1 and valve core 2, effective sealing is formed between valve core 2 and valve seat 1 above accommodating cavity 1.1, the medium in accommodating cavity 1.1 is prevented from leaking out, and meanwhile, the normal communication of working port 1.2, accommodating cavity 1.1 and flow channel 1.3 is not affected,

[0052] The elastic diaphragm 3 is elastically deformed when the valve core 2 reciprocates, so as to follow the position change of the valve core 2, and the elastic diaphragm 3 can always keep sealing effect, so that the device operates reliably.

[0053] Please refer to Figure 7 As shown in the figure, the upper and lower sides of the inner end of the elastic diaphragm 3 are respectively provided with first clamping blocks 3.1, and the upper and lower sides of the outer end are respectively provided with second clamping blocks 3.2.

[0054] The valve core 2 is provided with a first engagement groove for engaging the first clamping block 3.1, and the valve seat 1 is provided with a second engagement groove for engaging the second clamping block 3.2.

[0055] The above improvement makes the inner end of the elastic diaphragm 3 reliably connected with the valve core 2, and the outer end reliably connected with the valve seat 1, so that the elastic diaphragm 3 is stably connected, and the device has high reliability in operation.

[0056] Please refer to Figure 2 、 Figure 3 、 Figure 7 As shown in the figure, the valve seat 1 is provided with a connecting portion 4 extending upward, and the connecting portion 4 is engaged and connected to the lower side of a connecting seat 5;

[0057] The inner side of the connecting portion 4 is formed with a flange 4.1 extending inward, and the upper side of the flange 4.1 is provided with a limiting protrusion 4.11 extending upward, and a first clamping groove 4.111 is formed between the inner side of the connecting portion 4 and the limiting protrusion 4.11;

[0058] The accommodating cavity 1.1 is provided with a through hole in the valve seat 1;

[0059] The lower side of the connecting seat 5 is provided with a matching hole communicating with the accommodating cavity 1.1;

[0060] The connecting seat 5 is provided with a second clamping groove 5.1 opposite to the first clamping groove 4.111;

[0061] The second clamping groove 5.1 and the first clamping groove 4.111 form a first engagement groove after combination.

[0062] After the above improvement, the valve seat 1 forms an integral first clamping groove 4.111 after forming, and the static iron core forms an integral second clamping groove 5.1 after forming, and after the static iron core and the valve seat 1 are connected, the first clamping groove 4.111 and the second clamping groove 5.1 can be combined to form a first engagement groove, which can be more compact in structure, which is beneficial to the miniaturization of the whole, and is suitable for use on space-limited cars.

[0063] Please refer to Figure 2 、 Figure 3 、 Figure 5 As shown in the figure, the valve core 2 is provided with a center hole, and a guide rod 6 is inserted into the center hole, the guide rod 6 is connected with the output end of a driving assembly, and the driving assembly drives the valve core 2 to move up and down through the guide rod 6.

[0064] The driving assembly can adopt an electromagnetic driving assembly, for example, a moving iron core 8, a static iron core, a coil frame 9, and a coil 9.1 wound on the coil frame 9.

[0065] The coil frame 9 is internally provided with a sliding hole extending upward and downward, and the moving iron core 8 is movably arranged in the sliding hole,

[0066] The connecting seat 5 in the application can adopt a static iron core, which is arranged below the moving iron core 8, the lower end of the guide rod 6 passes through the static iron core and is connected with the valve core 2, and the upper end of the guide rod 6 is connected with the moving iron core 8.

[0067] When the coil 9.1 is powered, the moving iron core 8 is driven to move downward, so as to drive the valve core 2 to move downward through the guide rod 6,

[0068] The moving iron core 8 is further connected with a reset assembly, for example, a reset spring arranged between the static iron core and the moving iron core 8.

[0069] When the coil 9.1 is powered off, the reset spring drives the moving iron core 8 to move upward, so as to drive the valve core 2 to move upward through the guide rod 6.

[0070] Please refer to Figure 7 As shown in the figure, the guide rod 6 is provided with an extension 6.1 extending outward on the side, and a third clamping groove 6.11 is formed below the extension 6.1.

[0071] The valve core 2 is provided with a fourth clamping groove 2.1 opposite to the third clamping groove 6.11, and the fourth clamping groove 2.1 and the third clamping groove 6.11 form a second matching groove after being combined.

[0072] The guide rod 6 is formed with the third clamping groove 6.11 after being formed, and the valve core 2 is formed with the fourth clamping groove 2.1 after being formed, so that the third clamping groove 6.11 and the fourth clamping groove 2.1 can be combined to form the second matching groove after the guide rod 6 and the valve core 2 are assembled, which can be more compact in structure, and the connecting structure formed by the parts themselves can be used to fix the elastic diaphragm 3, which is beneficial to the miniaturization of the whole and is suitable for use on a space-limited automobile.

[0073] A supporting groove 4.112 is formed between the inner side of the limiting protrusion 4.11 and the inner side of the connecting portion 4,

[0074] The supporting washer 7 is combined and connected in the supporting groove 4.112, the supporting washer 7 is supported on the lower part of the elastic diaphragm 3, and the inner diameter of the supporting washer 7 is the same as the inner diameter of the matching hole.

[0075] After the valve seat 1 is formed, the integrated supporting groove 4.112 is formed, which is used to assemble the supporting washer 7, so that the structure is more compact and beneficial to the miniaturization of the device.

[0076] The support washer 7 supports the lower outer side of the elastic diaphragm 3, and the bottom wall of the matching hole supports the upper outer side of the support washer 7, and the two support actions are combined to make the elastic diaphragm 3 more stable.

[0077] In addition, the inner diameter of the support washer 7 is consistent with the inner diameter of the matching hole, so that the upper and lower leaked areas of the diaphragm are consistent, and then the upper and lower pressure areas are unified, so that the diaphragm can effectively elastically deform, and the operation reliability is better.

[0078] Please refer to Figure 2 , Figure 3 , Figure 4 As shown in the drawings, the convex ring 1.21 is arranged around the working port 1.2 above the working port 1.2, the valve core 2 is covered with the rubber coating 2.2, the rubber coating 2.2 is provided with the ring groove 2.21 at the position corresponding to the convex ring 1.21 at the bottom, and the valve core 2 can be moved downward to open the working port 1.2, and the ring groove 2.21 and the convex ring 1.21 are in engagement.

[0079] After the above improvement, when the ring groove 2.21 and the convex ring 1.21 are in engagement, the sealing performance of the working port 1.2 can be improved.

[0080] The above is only the preferred embodiment of the present application, and the protection scope of the present application is not limited to the above-mentioned embodiments. Any technical solution under the idea of the present application belongs to the protection scope of the present application. It should be pointed out that, for ordinary skilled in the art, some improvements and decorations without departing from the principle of the present application can also be considered as the protection scope of the present application.

Claims

1. A diaphragm seal structure of a valve core, characterized by, The utility model provides a valve, including: Valve seat (1), valve seat (1) is provided with accommodating cavity (1.1), work mouth (1.2) and flow channel (1.3); The work mouth (1.2) is located below the accommodating cavity (1.1) and is communicated with the accommodating cavity (1.1), and the flow channel (1.3) is communicated with the accommodating cavity (1.1); Valve core (2), valve core (2) is placed in accommodating cavity (1.1), and valve core (2) can move up and down to have the position of opening or closing work mouth (1.2); Elastic diaphragm (3), elastic diaphragm (3) is located above accommodating cavity (1.1), and inner end is connected with the sealing of valve core (2) periphery, and outer end is connected with the sealing of valve seat (1), Elastic diaphragm (3) can be elastically deformed to move along with valve core (2) and always keep the effect of sealing.

2. A diaphragm seal for a valve core according to claim 1, characterized in that: The upper and lower sides of the inner end of the elastic diaphragm (3) are respectively provided with first clamping blocks (3.1), and the upper and lower sides of the outer end are respectively provided with second clamping blocks (3.2); The valve core (2) is provided with a first engagement groove for engaging the first clamping block (3.1), and the valve seat (1) is provided with a second engagement groove for engaging the second clamping block (3.2).

3. A diaphragm seal for a valve core as claimed in claim 2, characterized in that: The valve seat (1) is provided with a connecting portion (4) extending upward above it, and the outer periphery of the connecting portion (4) is engaged and connected below a connecting seat (5); The inner side of the connecting portion (4) is formed with a flange (4.1) extending inward, and the upper side of the flange (4.1) is provided with a limiting protrusion (4.11) extending upward, and a first clamping groove (4.111) is formed between the inner side of the connecting portion (4) and the limiting protrusion (4.11); The accommodating cavity (1.1) is provided with a through hole above the valve seat (1); The lower side of the connecting seat (5) is provided with a matching hole communicating with the accommodating cavity (1.1) in the up and down directions, and the lower side of the connecting seat (5) is further provided with a second clamping groove (5.1) opposite to the first clamping groove (4.111); The second clamping groove (5.1) and the first clamping groove (4.111) form the first engagement groove after being combined.

4. A diaphragm seal for a valve core as defined in claim 2, characterized in that: The valve core (2) is provided with a center hole, and a guide rod (6) is inserted into the center hole, the guide rod (6) is connected with the output end of a driving assembly, and the driving assembly drives the valve core (2) to move up and down through the guide rod (6).

5. A diaphragm seal for a valve core as defined in claim 4, characterized in that: The outer periphery of the guide rod (6) is provided with an extension (6.1) extending outward, and a third clamping groove (6.11) is formed below the extension (6.1); The valve core (2) is provided with a fourth clamping groove (2.1) opposite to the third clamping groove (6.11), and the fourth clamping groove (2.1) and the third clamping groove (6.11) form the second engagement groove after being combined.

6. A diaphragm seal for a valve core as defined in claim 3, characterized in that: A supporting groove (4.112) is formed between the inner side of the connecting portion (4) and the inner side of the limiting protrusion (4.11), A supporting washer (7) is engaged and connected in the supporting groove (4.112), the supporting washer (7) supports the lower part of the elastic diaphragm (3), and the inner diameter of the supporting washer (7) is the same as the inner diameter of the matching hole.

7. The diaphragm seal for a valve core according to claim 1, characterized in that: The convex ring (1.21) is arranged above the working port (1.2) and surrounds the working port (1.2), the valve core (2) is covered with a rubber coating (2.2), the rubber coating (2.2) is provided with a ring groove (2.21) at the position corresponding to the convex ring (1.21), and the valve core (2) can be moved downward to open the working port (1.2), and the ring groove (2.21) is in engagement with the convex ring (1.21).

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