Valve device

Abstract

The utility model discloses a valve device which comprises a valve body and a sealing gasket, the valve body comprises a valve shell and an attaching sealing part, the attaching sealing part is connected to the inner wall face of the valve shell, and the sealing gasket is located in the valve shell and moves in the direction close to or away from the attaching sealing part. The side, facing the sealing gasket, of the attaching sealing part is provided with a first annular groove concaved inwards and a plurality of sealing attaching faces, and the sealing gasket abuts against the side face of the attaching sealing part so that the multiple sealing attaching faces can be attached to the sealing gasket in a sealed mode. A containing cavity used for containing impurities is formed between the sealing gasket and the attaching sealing part through the first annular groove. According to the valve device, the containing cavity used for containing the impurities is formed in the attaching sealing part of the valve body, so that the impurities in the valve body are collected, the situation of air leakage is effectively avoided, and the sealing performance of the valve device is greatly improved.

Description

Technical Field

[0001] The utility model relates to a valve device. Background Art

[0002] The existing valve body and the solenoid valve core of the common solenoid valve are sealed by the rubber sealing ring on the solenoid valve core. Since strip-shaped aluminum chips and granular aluminum chips are generated during the processing and manufacturing of the valve body, the valve body will leak when the aluminum chips adhere to the sealing surface between the solenoid valve and the valve body. In order to reduce the leakage problem, the existing solutions are mainly through ultrasonic cleaning, compressed air blowing cleaning, etc.; ultrasonic cleaning and compressed air blowing cleaning can only remove larger strip-shaped aluminum chips and some granular aluminum chips, and there are still many granular aluminum chips that cannot be eradicated. When checking that the valve body assembly parts are not leaking, the position of the aluminum chip particles inside the valve body changes due to transportation vibration and ventilation. When the position of the particles changes to the sealing surface, leakage will occur. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a valve device in order to overcome the valve leakage problem in the prior art.

[0004] The utility model solves the above technical problems through the following technical solutions:

[0005] A valve device comprises a valve body and a sealing gasket, the valve body comprises a valve shell and a fitting sealing portion, the fitting sealing portion is connected to the inner wall surface of the valve shell, the sealing gasket is located in the valve shell and moves in a direction approaching or away from the fitting sealing portion, and a first annular groove recessed inwardly and a plurality of sealing fitting surfaces are provided on the side of the fitting sealing portion facing the sealing gasket, the sealing gasket abuts against the side surface of the fitting sealing portion so that the plurality of sealing fitting surfaces are all sealingly fitted to the sealing gasket, and a accommodating cavity for accommodating impurities is formed between the sealing gasket and the fitting sealing portion through the first annular groove.

[0006] In the present solution, when the valve device is in a closed state, the sealing gasket and the fitting sealing part are fitted together, and impurities in the valve body are retained in the first annular groove between the sealing gasket and the fitting sealing part. The first annular groove forms a accommodating cavity for accommodating impurities, and impurities such as granular aluminum chips generated during the valve body manufacturing process are collected in the accommodating cavity, so that the valve body is not affected by impurities, and multiple sealing fitting surfaces can be completely fitted with the sealing gasket without leakage, which effectively avoids leakage and greatly improves the sealing performance of the valve device.

[0007] Preferably, any one of the first annular grooves is located between two adjacent sealing surfaces.

[0008] In the present embodiment, the adjacent sealing fitting surfaces of the first annular groove form an annular ring, and impurities in the valve body fall into the first annular groove, so that the annular ring formed by the sealing fitting surfaces on both sides of the first annular groove can fit tightly with the sealing gasket. In this way, the annular ring formed by the fitting surfaces of multiple first annular grooves that can accommodate impurities and the fitting parts can ensure a tight fit and no air leakage.

[0009] Preferably, the cross-section of the first annular groove is rectangular.

[0010] In this solution, the space of the accommodating cavity is utilized to the maximum extent, and a large amount of impurities can be collected.

[0011] Preferably, there are multiple first annular grooves.

[0012] In this solution, when there are multiple first annular grooves, any first annular groove has two sealing fitting surfaces on both sides to form two annular sealing rings. Assuming there are n sealing rings (n≥2), under the same conditions, the probability of reducing leakage caused by impurities such as aluminum chips is (1 / 2)^n. If the valve body structure permits, the number of sealing rings is n (n≥2), and the larger the n value, the lower the risk of leakage.

[0013] Preferably, a second annular groove recessed inwardly is provided on one side of the sealing gasket facing the fitting sealing portion, and the second annular groove is arranged corresponding to the first annular groove, so that when the sealing gasket abuts against the fitting sealing portion, the accommodating cavity is formed between the second annular groove and the first annular groove.

[0014] In the present solution, a second annular groove recessed inwardly is provided on the sealing gasket and is arranged corresponding to the first annular groove. When the sealing gasket and the fitting sealing portion are abutted, the first annular groove on the inner wall of the valve and the second annular groove on the sealing gasket form a larger accommodating cavity. The two grooves of the same space double the space of the original single groove. Such an accommodating cavity can accommodate aluminum chips that are twice as large in diameter as the original granular aluminum chips. Large-sized granular aluminum chips can also be collected in the accommodating cavity, thereby preventing impurities from affecting the sealing of the sealing gasket and the fitting sealing portion.

[0015] Preferably, the number of the first annular groove and the number of the second annular groove are both plural and correspond one to one.

[0016] Preferably, the cross-section of the second annular groove is rectangular.

[0017] In the present embodiment, the inwardly recessed second annular groove opened on the side of the sealing gasket facing the fitting sealing part has a rectangular cross-sectional shape. Compared with other shapes such as semicircles and triangles, the rectangular cross-section with the same inner cavity volume can accommodate impurities such as granular aluminum chips with relatively larger diameters, which is more conducive to collecting impurities, so that the sealing gasket and the fitting sealing part are not affected by impurities when fitting together, and the sealing performance is good.

[0018] Preferably, a third annular groove for accommodating impurities is formed between the valve housing and the fitting sealing portion, and when the sealing gasket abuts against the fitting sealing portion, the third annular groove is exposed to the outside of the sealing gasket.

[0019] In this solution, a third annular groove for accommodating impurities is added between the valve housing and the fitting sealing portion. When the sealing gasket and the fitting sealing portion are in contact with each other, the third annular groove is still open in the direction of the sealing gasket and exposed to the outside of the sealing gasket. The third annular groove is also recessed inward along the axial direction of the valve body. In this way, when in the conducting state, the airflow refluxes inside the valve housing, and the third annular groove and other first annular grooves and second annular grooves jointly adsorb and collect particulate aluminum chips, so that the discrete and randomly distributed aluminum chips inside the valve body are collected in the groove, reducing the probability of air leakage.

[0020] Preferably, a notch of the third annular groove faces the sealing gasket, and the third annular groove is recessed inwardly along the axial direction of the valve body.

[0021] Preferably, the valve device also includes a shell, an electromagnetic assembly, a movable rod and a spring, the shell, the movable rod and the spring are all located in the valve body, the electromagnetic assembly is located in the shell, one end of the movable rod is connected to the electromagnetic assembly, the other end of the movable rod extends to the shell and is connected to the sealing gasket, the spring is sleeved on the movable rod, and the two ends of the spring respectively abut against the shell and the sealing gasket.

[0022] In this solution, the valve device includes an electromagnetic assembly, and the electromagnetic force generated pulls the movable rod to move axially away from the fitting sealing part. The spring sleeved on the movable rod is compressed, and gas or liquid flows into the valve body; after the electromagnetic is closed, the electromagnetic force disappears, the spring resets, and pulls the movable rod to move axially toward the fitting sealing part, the sealing gasket and the fitting sealing part are re-fitted, and gas or liquid can no longer flow into the valve body.

[0023] On the basis of being in accordance with the common sense in the art, the above-mentioned preferred conditions can be arbitrarily combined to obtain the preferred embodiment of the utility model.

[0024] The positive and progressive effects of the utility model are:

[0025] The valve device of the utility model overcomes the problem that the existing sonic cleaning and compressed air blowing cleaning can only remove the larger strip-shaped aluminum chips and a part of the granular aluminum chips in the valve body, and there are still a lot of granular aluminum chips that cannot be eradicated. By providing a receiving cavity for accommodating impurities on the fitting sealing part of the valve body, the impurities in the valve body are collected, effectively avoiding the occurrence of air leakage, and greatly improving the sealing performance of the valve device. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic structural diagram of the valve device of an embodiment of the utility model in an open state.

[0027] Figure 2 It is a schematic structural diagram of the valve device of the embodiment of the utility model in the closed state.

[0028] Figure 3 for Figure 1 A partial enlarged schematic diagram of part A.

[0029] Figure 4 It is a structural schematic diagram of the fitting sealing part of an embodiment of the utility model.

[0030] Description of reference numerals:

[0031] 100 Valve Body

[0032] 101 valve housing

[0033] 102 Lamination and sealing part

[0034] 103 first annular groove

[0035] 104 Sealing surface

[0036] 105 third annular groove

[0037] 200 Sealing pad

[0038] 201 second annular groove

[0039] 300 Solenoid Assembly

[0040] 400 movable rod

[0041] 500 Spring

[0042] 600 Shell DETAILED DESCRIPTION

[0043] The present invention will be described more clearly and completely below by way of embodiments in conjunction with the accompanying drawings, but the present invention is not limited to the scope of the following embodiments.

[0044] like Figure 1-Figure 4As shown, the present embodiment discloses a valve device, which includes a valve body 100, a sealing gasket 200, a shell 600, an electromagnetic assembly 300, a movable rod 400 and a spring 500. The valve body 100 includes a valve shell 101 and a fitting sealing portion 102. The shell 600, the movable rod 400 and the spring 500 are all located in the valve body 100. The electromagnetic assembly 300 is located in the shell 600. One end of the movable rod 400 is connected to the electromagnetic assembly 300 in the shell 600, and the other end of the movable rod 400 extends the shell 600 and is connected to the sealing gasket 200. The spring 500 is sleeved on a portion of the movable rod 400 outside the shell 600, and the two ends of the spring 500 are respectively against the shell 600 and the sealing gasket 200.

[0045] like Figure 1 As shown, the electromagnetic assembly 300 in this embodiment generates electromagnetic force when energized, and the electromagnetic force pulls the movable rod 400 to move axially away from the fitting sealing portion 102. The spring 500 sleeved on the movable rod 400 is continuously compressed, the channel opens, and the gas or liquid immediately flows into the valve body 100, and the gas or liquid in the valve housing 101 flows freely.

[0046] like Figure 2 As shown, when the electromagnetic assembly 300 is powered off, the electromagnetic force disappears, and the spring 500 is no longer compressed by the electromagnetic force. The spring 500 is reset, pulling the movable rod 400 and pushing the sealing gasket 200 to move axially toward the fitting sealing portion 102, so that the sealing gasket 200 and the fitting sealing portion 102 are fitted again, and the channel is closed, preventing gas or liquid from flowing into and filling the entire valve housing 101.

[0047] Specifically, Figure 3 As shown, in this embodiment, the fitting sealing part 102 is connected to the inner wall surface of the valve housing 101, and the sealing gasket 200 is located in the valve housing 101 and can move left and right in the direction close to or away from the fitting sealing part 102, so as to realize that the valve device is in a closed state or an open state, that is, to close or open the channel. A first annular groove 103 and a plurality of sealing fitting surfaces 104 that are recessed inward are provided on the side of the fitting sealing part 102 facing the sealing gasket 200. When the sealing gasket 200 abuts against the side of the fitting sealing part 102, the plurality of sealing fitting surfaces 104 will all be sealed and fitted with the sealing gasket 200, and a receiving cavity is formed between the sealing gasket 200 and the fitting sealing part 102 through the first annular groove 103, which can be used to accommodate impurities, effectively preventing impurities from affecting the sealing fitting of the sealing fitting surface 104 and the sealing gasket 200, and realizing that the plurality of sealing fitting surfaces 104 can be completely fitted with the sealing gasket 200 without air leakage, thereby greatly improving the sealing performance of the valve device.

[0048] like Figure 3 and Figure 4As shown, any one of the first annular grooves 103 is located between two adjacent sealing surfaces 104. This means that there is one first annular groove 103 between two annular sealing surfaces 104.

[0049] The accommodating cavity formed by the first annular groove 103 of this embodiment can collect impurities on the adjacent annular sealing fitting surface 104, so that impurities such as granular aluminum chips that cannot be completely eradicated by conventional ultrasonic cleaning and compressed air blowing cleaning can fall into the accommodating cavity formed by the first annular groove 103 under conditions such as transportation vibration, so that each sealing fitting surface 104 can fit tightly with the sealing gasket 200.

[0050] Specifically, Figure 3 As shown, the cross-sectional shape of the first annular groove 103 of this embodiment is rectangular. The amount of impurities such as granular iron filings stored in a receiving cavity with a cross-sectional shape such as a trapezoid or a triangle will be affected to a certain extent, and the space of all the receiving cavities cannot be fully utilized. The amount of impurities collected is limited, and the space utilization rate is low. In this embodiment, the cross-sectional shape of the first annular groove 103 is set to a rectangular shape, so that the space of the receiving cavity is maximized and the amount of impurities collected is large.

[0051] like Figure 3 and Figure 4 As shown, specifically, the number of the first annular grooves 103 of this embodiment is multiple, so that the accommodating cavities formed by the first annular grooves 103 are more, and the collection amount of impurities such as granular aluminum chips is multiplied. Impurities such as granular aluminum chips that are not cleaned before sticking to the sealing gasket 200 or the sealing part 102 can find the accommodating cavity formed by the first annular groove 103 nearby during vibration and other processes, and fall into the accommodating cavity formed by the first annular groove 103 nearby at any time and anywhere, making it easier to clean impurities such as granular aluminum chips, thereby improving airtightness. At the same time, due to the sealing fit of the multi-layer sealing fitting surface 104 and the sealing gasket 200, multi-layer sealing protection is added, which is less prone to air leakage.

[0052] like Figure 4 As shown, in the embodiment, for example, three-ring sealing is used to reduce the probability of air leakage caused by granular aluminum chips impurities under the same conditions. Air leakage will only occur when granular aluminum chips impurities are present in all rings at the same time, that is, the air leakage risk probability is 1 / 2×1 / 2×1 / 2=1 / 6. If two-ring sealing is used, the air leakage risk probability is 1 / 2×1 / 2=1 / 4; if the valve body 100 structure allows, the number of sealing surfaces 104 is n (n≥2), and the larger the n value, the lower the air leakage risk, that is, the air leakage probability is (1 / 2)^n.

[0053] like Figure 3As shown, the present embodiment also improves the structure of the sealing gasket 200, and a second annular groove 201 is provided in the sealing gasket 200 on one side facing the fitting sealing portion 102, and the second annular groove 201 is arranged at a position corresponding to the first annular groove 103, so that when the sealing gasket 200 is against the fitting sealing portion 102, a receiving cavity is formed between the first annular groove 103 and the second annular groove 201. When the first annular groove 103 and the second annular groove 201 are of the same size, the receiving space of the receiving cavity formed between the first annular groove 103 and the second annular groove 201 is directly doubled. Moreover, the receiving cavity formed by the first annular groove 103 and the second annular groove 201 not only increases the number of impurities to be accommodated, but also increases the diameter of the granular aluminum chips that can be accommodated. Compared with the receiving cavity formed by the groove provided on a single surface of the fitting sealing portion, when the diameter of the granular aluminum chips is greater than the maximum receiving diameter of the groove, air leakage will occur. Now, a groove is provided in the sealing gasket, so that the receiving cavity formed by the two corresponding grooves can accommodate impurities with a larger diameter and avoid air leakage. The first annular groove 103 and the second annular groove 201 may also have different inner concave depths.

[0054] Specifically, the cross-sectional shape of the second annular groove 201 in this embodiment is rectangular. This has the same purpose as setting the cross-sectional shape of the first annular groove 103 to be rectangular, which is to make the accommodation cavity formed between the first annular groove 103 and the second annular groove 201 more space-efficient and to accommodate granular iron filings with large diameters.

[0055] like Figure 3 As shown, in this embodiment, a third annular groove 105 is further provided on the valve body 100. Different from the first annular groove 103 and the second annular groove 201, a third annular groove 105 for accommodating impurities is formed between the valve housing 101 and the fitting sealing portion 102; when the sealing gasket 200 abuts against the fitting sealing portion 102, the third annular groove 105 is exposed to the outside of the sealing gasket 200. This allows impurities such as granular aluminum chips to be collected by the accommodating cavity formed by the first annular groove 103 and the second annular groove 201, while providing another option, that is, the impurities such as granular aluminum chips will be collected in the third annular groove 105.

[0056] Specifically, the notch of the third annular groove 105 of the present embodiment faces the sealing gasket 200, and the third annular groove 105 is recessed inwardly along the axial direction of the valve body 100. Through the first annular groove 103, the second annular groove 201 and the third annular groove 105, when the electromagnetic assembly 300 is powered on, the airflow forms a reflux in the valve body 100, and these grooves continuously absorb and collect impurities such as granular aluminum chips, so that the impurities such as granular aluminum chips that were originally randomly distributed in the valve body 100 are all collected in a directional manner in each groove structure, so that the probability of the impurities such as granular aluminum chips being distributed to the sealing fitting surface 104 is reduced, the probability of air leakage is reduced, and the airtightness performance is improved.

[0057] Although the specific implementations of the utility model are described above, those skilled in the art should understand that this is only an example, and the protection scope of the utility model is defined by the attached claims. Those skilled in the art can make various changes or modifications to these implementations without departing from the principle and essence of the utility model, but these changes and modifications fall within the protection scope of the utility model.

Claims

1. A valve device, characterized in that: The closure of the valve body is of the type described in claim 1, wherein the closure is an outer wall of the valve body and the closure is located adjacent to the valve body. The closure is located adjacent to the valve body and the closure is located adjacent to the valve body.

2. The valve device according to claim 1, characterized in that Any one of the first annular grooves is located between two adjacent sealing surfaces.

3. The valve device according to claim 1, characterized in that The cross-section of the first annular groove is rectangular.

4. The valve device according to claim 1, characterized in that The number of the first annular grooves is plural.

5. The valve device according to claim 1, characterized in that A second annular groove recessed inwardly is provided in the sealing gasket on one side facing the fitting sealing portion, and the second annular groove is arranged corresponding to the first annular groove so that when the sealing gasket abuts against the fitting sealing portion, the accommodating cavity is formed between the second annular groove and the first annular groove.

6. The valve device according to claim 5, characterized in that The number of the first annular grooves and the number of the second annular grooves are both multiple and correspond one to one.

7. The valve device according to claim 5, characterized in that The cross-section of the second annular groove is rectangular.

8. The valve device according to claim 1, characterized in that A third annular groove for accommodating impurities is formed between the valve housing and the fitting sealing portion; when the sealing gasket abuts against the fitting sealing portion, the third annular groove is exposed to the outside of the sealing gasket.

9. The valve device according to claim 8, characterized in that The notch of the third annular groove faces the sealing gasket, and the third annular groove is recessed inwardly along the axial direction of the valve body.

10. The valve device according to claim 1, characterized in that The valve device also includes a shell, an electromagnetic assembly, a movable rod and a spring. The shell, the movable rod and the spring are all located in the valve body. The electromagnetic assembly is located in the shell. One end of the movable rod is connected to the electromagnetic assembly, and the other end of the movable rod extends to the shell and is connected to the sealing gasket. The spring is sleeved on the movable rod, and the two ends of the spring are respectively against the shell and the sealing gasket.

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