CN219827718U - Sealing structure and reversing valve comprising same - Google Patents

Abstract

The utility model relates to a sealing structure and a reversing valve comprising the same, wherein the sealing structure comprises a sealing body with an inner cavity, the sealing body is arranged in a ring shape along the circumferential direction, at least one first hole is formed in the sealing body, at least two protruding parts are arranged outside the sealing body, a first air passage is arranged inside each protruding part, and the first air passage is communicated with the inner cavity through the first hole. The reversing valve comprises a valve body, a valve core is rotatably arranged on the valve body through a valve driving mechanism, a second channel is formed in the valve core, a first ceramic pipe is arranged on the inner side of the second channel, and a second ceramic pipe is arranged on the inner side of each connecting pipe. Through setting up first ceramic pipe in the inside of case, set up the second ceramic pipe in the inside of takeover, it can adapt to the great material of mill cut nature, avoids the powder granule material to the inside high-speed washing of case, has improved the life of case.

Description

Sealing structure and reversing valve comprising same

Technical Field

The utility model relates to the field of gas control equipment, in particular to a sealing structure and a reversing valve comprising the same.

Background

Reversing valves are a critical structure in pneumatic conveying systems for controlling and distributing the direction of flow of gas or material in a pipe. At present, the most important of the conventional reversing valve in the design process is to ensure good air tightness, so that gas and materials can not leak in the operation process, and the problems of system failure, damage or environmental pollution caused by leakage are avoided.

At present, in order to solve the leakage problem of the materials, the conventional reversing valve adopts a plurality of sealing elements with different structural sizes, but the conventional reversing valve has the following problems:

the structure is complex, because the sealing pieces with different structure sizes are adopted, the sealing pieces are arranged in a semi-sealing mode, when one sealing piece has a leakage problem, the whole reversing valve structure cannot be used continuously, the disassembly and assembly of the sealing pieces are complex, and the cost of adopting the sealing pieces is high.

And (II) the powder particles wash the valve inner structure at a high speed, so that the valve inner structure is easily damaged, and even the reversing valve is scrapped.

Disclosure of Invention

In view of the foregoing drawbacks of the prior art, an object of the present utility model is to provide a sealing structure and a reversing valve including the same, which solve one or more of the problems of the prior art.

In order to achieve the above purpose, the technical scheme of the utility model is as follows:

the utility model provides a seal structure, seal structure is including the seal body that has the inner chamber, the seal body arranges into the annular along the circumferencial direction, set up at least one first hole on the seal body, the outside of seal body sets up two at least bulge, every the inside of bulge has first gas passage, first gas passage pass through first hole with the inner chamber intercommunication.

Further, an opening is further formed in one end, far away from the sealing body, of the protruding portion.

Further, the protruding part is near one end of the sealing body, and a step is formed on the sealing body in a radial extending mode.

Further, the outer side of the sealing body is provided with a first inclined plane.

Further, the first hole is a conical hole, and the aperture of the first hole is gradually decreased along the inflow direction of the gas.

Correspondingly, the utility model also provides a reversing valve, which comprises a valve body with a plurality of first channels, a valve core is rotatably arranged on the valve body through a valve driving mechanism, a second channel is arranged in the valve core, each first channel is provided with a connecting pipe, and one end of each connecting pipe extending out of the first channel is connected with a material pipe, and the reversing valve is characterized in that: the inner side of the second channel is provided with a first ceramic pipe, the inner side of each connecting pipe is provided with a second ceramic pipe, a first fixing piece and a second fixing piece are respectively arranged between the outer side of each connecting pipe and the inner side of the valve body, the sealing structure is arranged between the first fixing piece and the second fixing piece, and the first fixing piece, the sealing structure and the second fixing piece are connected with the flange together.

Further, an air inlet part is arranged on the outer side of the flange, a second air passage which can be connected with the air inlet part is arranged in the flange, and one end, far away from the air inlet part, of the second air passage is connected with the first air passage of the sealing structure.

Further, the air inlet end of the air inlet part is connected with the air outlet end of the pneumatic linkage part through a first electromagnetic valve, the air inlet end of the pneumatic linkage part is connected with an air source, the air outlet end of the pneumatic linkage part is also connected with the air inlet end of a second electromagnetic valve, the air outlet end of the second electromagnetic valve is connected with the air inlet end of the air valve driving mechanism, and the air outlet end of the air valve driving mechanism is also connected with the air inlet end of the second electromagnetic valve.

Further, a muffler is provided on either the first solenoid valve or the second solenoid valve.

Further, the thickness of the first ceramic tube and the second ceramic tube is 10 mm-12 mm.

Compared with the prior art, the utility model has the following beneficial technical effects that

The utility model has simple structure and convenient use, and the first ceramic pipe is arranged in the valve core, and the second ceramic pipe is arranged in the connecting pipe, so that the utility model can adapt to the material with larger polishing property, avoid the high-speed scouring of powder particles to the interior of the valve core, and prolong the service life of the valve core.

And (II) further, a sealing structure is adopted, and the sealing body is arranged in a ring shape along the circumferential direction and is arranged at the channel opening of the second channel of the valve core in a ring shape, so that the 360-degree channel opening can be completely sealed, and the channel between the valve body and the valve core is sealed after the valve core stops turning, so that materials are prevented from entering the valve body, and the service life of the valve body is prevented from being influenced.

And (III) further, an opening is formed in the protruding part of the sealing structure, and meanwhile, a first extension part is arranged on the first fixing piece, so that the protruding part can be abutted by the first extension part when the first fixing piece is assembled with the sealing structure, and the installation stability of the sealing structure is improved.

And (IV) further, a step is arranged on the sealing body and can be abutted with the second extension part of the first fixing piece and the third extension part of the second fixing piece, so that the reliability of connection of the first fixing piece and the second fixing piece with the sealing body is effectively improved.

And fifthly, the sealing body is provided with a first inclined plane, and the third extension part of the second fixing piece is provided with a second inclined plane, so that the sealing body can be rapidly positioned when being connected with the second fixing piece, and the installation efficiency is improved.

Drawings

Fig. 1 shows a schematic cross-sectional view of a seal structure and a reversing valve incorporating the seal structure according to an embodiment of the present utility model.

Fig. 2 shows a top view of a seal structure and a reversing valve incorporating the same according to an embodiment of the present utility model.

Fig. 3 shows a schematic structural diagram of a sealing structure and a reversing valve in the reversing valve comprising the sealing structure.

Fig. 4 shows a cross-sectional view of a sealing structure and a reversing valve in a reversing valve comprising the sealing structure according to an embodiment of the present utility model.

Fig. 5 shows a partial cross-sectional view of a sealing structure and a reversing valve in a reversing valve comprising the same according to an embodiment of the present utility model.

Fig. 6 shows a partially enlarged view of a sealing structure and a reversing valve in the reversing valve comprising the sealing structure according to an embodiment of the present utility model.

Fig. 7 is a schematic diagram showing a first working state of a reversing valve in a reversing valve and a sealing structure according to an embodiment of the utility model.

Fig. 8 is a schematic diagram showing a second working state of a reversing valve in a reversing valve and a sealing structure comprising the sealing structure according to an embodiment of the present utility model.

Fig. 9 shows a seal structure and a pneumatic control schematic diagram of a reversing valve in the reversing valve comprising the seal structure according to an embodiment of the present utility model.

The reference numerals in the drawings: 1. a sealing structure; 100. a sealing body; 101. a first inclined surface; 102. an inner cavity; 103. a step; 104. a first hole; 105. a protruding portion; 1050. a first airway; 106. an opening; 2. a valve driving mechanism; 3. a cover plate; 4. a valve body; 400. an air inlet part; 401. a first channel; 5. connecting pipe; 6. a first material pipe; 600. a discharge port; 7. a second material pipe; 700. a feed inlet; 8. a valve core; 800. a second channel; 900. a first seal ring; 901. a second seal ring; 902. a third seal ring; 903. a fourth seal ring; 904. a fifth seal ring; 10. a shaft; 1100. a first ceramic tube; 1101. a second ceramic tube; 12. a flange; 1201. a second airway; 131. a first fixing member; 1310. a first extension; 1311. a second extension; 132. a second fixing member; 1321. a third extension; 1322. a second inclined surface; 14. a gas source; 15. a pneumatic linkage; 16. a first electromagnetic valve; 17. a second electromagnetic valve; 18. a muffler; 19. pressure detection alarm switch.

Detailed Description

In order to make the objects, technical solutions and advantages of the present utility model more apparent, a sealing structure and a reversing valve comprising the same according to the present utility model will be described in further detail below with reference to the accompanying drawings and detailed description. The advantages and features of the present utility model will become more apparent from the following description. It should be noted that the drawings are in a very simplified form and are all to a non-precise scale, merely for the purpose of facilitating and clearly aiding in the description of embodiments of the utility model. For a better understanding of the utility model with objects, features and advantages, refer to the drawings. It should be understood that the structures, proportions, sizes, etc. shown in the drawings are for illustration purposes only and should not be construed as limiting the utility model to the extent that any modifications, changes in the proportions, or adjustments of the sizes of structures, proportions, or otherwise, used in the practice of the utility model, are included in the spirit and scope of the utility model which is otherwise, without departing from the spirit or essential characteristics thereof.

Referring to fig. 1, the sealing structure 1 includes a sealing body 100 having an inner cavity 102, the sealing body 100 is arranged in a ring shape along a circumferential direction, at least one first hole 104 is formed in the sealing body 100, the first hole 104 is a tapered hole, the aperture of the first hole 104 decreases along the gas inflow direction, that is, the aperture of the upper half of the first hole 104 is large, the aperture of the lower half of the first hole 104 is small, and by the design of the tapered hole, the flow rate of the gas filled into the inner cavity 102 can be increased, so that the sealing structure 1 can be rapidly expanded.

Further, with continued reference to fig. 1 and 2, at least two protrusions 105 are disposed on the outer portion of the sealing body 100 in the vertical direction at the opening of the first hole 104, and each protrusion 105 has a first air passage 1050 inside, and the first air passage 1050 communicates with the inner cavity 102 through the first hole 104.

Further, an opening 106 is further formed at an end of the protruding portion 105 away from the sealing body 100, and the opening 106 is used for being matched with a fixing member later, which will be described in detail below. A step 103 is also formed on the seal body 100 extending radially at the end of the projection 105 near the seal body 100.

Further, the outer side of the sealing body 100 has a first inclined surface 101, and the first inclined surface 101 is used for positioning the second fixing member 132.

The reversing valve having the above-described sealing structure 1 is described in detail below as follows:

referring to fig. 3 to 8, the reversing valve includes a valve body 4 having a plurality of first passages 401, and preferably, in the sealing structure 1 of the present embodiment, the valve body 4 is a three-way valve, so that the first passages 401 have three passages. The valve core 8 is rotatably disposed on the valve body 4 through the valve driving mechanism 2, please refer to fig. 3 and 4, a second channel 800 is disposed in the valve core 8, a shaft 10 disposed along a vertical direction is disposed at a center of the valve core 8, one end of the shaft 10, which is close to the valve driving mechanism 2, passes through the cover plate 3 and is connected with an output end of the valve driving mechanism 2, one end of the shaft 10, which is far away from the valve driving mechanism 2, is rotatably connected with the valve body 4, the shaft 10 can be driven to rotate through the output end of the valve driving mechanism 2, that is, a revolute pair is transmitted to the valve core 8, so that the rotation of the shaft changes the direction of the second channel 800 in the valve core 8, and then the conveying direction of the material body is changed.

Further, in order to improve the tightness of the connection between the cover plate 3 and the valve body 4, a first sealing ring 900 is further provided at the connection between the cover plate 3 and the valve body 4, and similarly, in order to ensure the tightness of the connection between the shaft 10 and the cover plate 3, a plurality of second sealing rings 901 are further installed on the outer ring of the shaft 10.

Specifically, please continue to refer to fig. 3 to 8, a connection pipe 5 is connected to each first channel 401, a portion of the connection pipe 5 extends into the first channel 401, another portion of the connection pipe 5 extends out of the first channel 401 and is connected to the pipe, specifically, one end of each connection pipe 5 extending out of the first channel 401 is connected to the first pipe 6, and one end of each connection pipe 5 extending out of the first channel 401 is connected to the second pipe 7.

Further, please continue to refer to fig. 3 to 8, in order to ensure that the material with larger polishing performance can be handled, the abrasion of the second channel 800 inside the valve core 8 caused by the high-speed scouring of the material is avoided, the inner side of the second channel 800 is welded with the first ceramic tube 1100, and likewise, in order to improve the service life of the adapter tube 5, the inner side of the adapter tube 5 is welded with the second ceramic tube 1101, and the pipe diameter of the first ceramic tube 1100 is the same as the pipe diameter of the second ceramic tube 1101. Preferably, the thickness of the first ceramic tube 1100 and the second ceramic tube 1101 is 10 mm-12 mm, and if the thickness is less than 10mm, the abrasion resistance of the ceramic tubes is affected.

Further, referring to fig. 5 to 8, a first fixing member 131 and a second fixing member 132 are further disposed between the outer side of the end of the connecting tube 5 extending into the first channel 401 and the inner side of the valve body 4, and the sealing structure 1 is fixed between the first fixing member 131 and the second fixing member 132. Specifically, the first fixing member 131 is connected to the outer circumference of the adapter tube 5, wherein one end of the first fixing member 131 has a first extension portion 1310 extending in a radial direction, and the first extension portion 1310 may be inserted into the opening 106 on the protrusion 105 in the sealing structure 1. The other end of the first fixing member 131 also has a second extending portion 1311 extending in the radial direction, and the second extending portion 1311 abuts against the bottom surface of a part of the step 103 in the seal body 100.

After the sealing structure 1 surrounds the outer side of the first fixing member 131 in the axial direction, a second fixing member 132 is sleeved on the outer side of the sealing structure 1, an upper half portion of the second fixing member 132 abuts against the valve body 4, a lower half portion of the second fixing member 132 is provided with a third extending portion 1321 extending in the radial direction, the third extending portion 1321 abuts against the outer side of the sealing body 100, and meanwhile, the third extending portion 1321 abuts against the bottom surface of the step 103 of the sealing body 100, so that connection reliability of the sealing body 100 and the second fixing member 132 is ensured. On the inner side of the third extension 1321, there is a second inclined surface 1322, the second inclined surface 1322 is in contact with the first inclined surface 101, and the second inclined surface 1322 is positioned by the first inclined surface 101, so as to ensure quick positioning and installation of the second fixing member 132.

Further, referring to fig. 5 to 8, in order to ensure the mounting stability of the first fixing member 131, the second fixing member 132, and the sealing structure 1, the upper surfaces of the first fixing member 131, the sealing structure 1, and the second fixing member 132 are commonly connected to the flange 12. The inner side of the flange 12 is welded to the outer side of the adapter tube 5.

Referring to fig. 6, in order to ensure the tightness between the above structures, a third sealing ring 902 is further embedded in the flange 12 at the connection position of the flange 12 and the second fixing member 132, and a fourth sealing ring 903 is also embedded in the second fixing member 132 at the connection position of the second fixing member 132 and the valve body 4. Similarly, a fifth sealing ring 904 is further disposed on the first fixing member 131 at the connection between the flange 12 and the first fixing member 131.

Further, referring to fig. 5 to 8, in order to ensure the inflation of the sealing structure 1, an air inlet 400 is disposed at the outer side of the flange 12, a second air passage 1201 connected to the air outlet end of the air inlet 400 is disposed at the inner side of the flange 12, and the other end of the second air passage 1201 far from the air inlet 400 is connected to a first air passage 1050 of the sealing structure 1.

Further, please continue to refer to fig. 5 to fig. 8, the air inlet end of each air inlet portion 400 is connected with the air outlet end of the pneumatic duplex member 15 through the first electromagnetic valve 16 after being assembled into one air channel through a plurality of air channels, the air inlet end of the pneumatic duplex member 15 is connected with the air source 14, the air outlet end of the pneumatic duplex member 15 is also connected with the air inlet end of the second electromagnetic valve 17 through another air channel, the air outlet end of the second electromagnetic valve 17 is connected with the air inlet end of the air valve driving mechanism 2, and the air outlet end of the air valve driving mechanism 2 is also connected with the air inlet end of the second electromagnetic valve 17. The muffler 18 is provided on either the first solenoid valve 16 or the second solenoid valve 17, and the pressure detection alarm switch 19 is also connected to the air path connecting the air intake portion 400 and the first solenoid valve 16.

The specific working process of the utility model is as follows:

referring to fig. 7 to 8, fig. 7 is a schematic diagram showing the through state of the reversing valve according to the present embodiment, in which the material enters from the right inlet 700, passes through the second channel 800 of the valve core 8, passes through the left connecting tube 5, and then is sent out from the outlet 600 of the first pipe 6. After the air source 14 supplies air to the pneumatic double-connecting piece 15, the pneumatic double-connecting piece 15 filters the air and then conveys the air to the air valve driving mechanism 2 through the second electromagnetic valve 17, the valve core 8 can rotate 135 degrees through the driving of the air valve driving mechanism 2, when the air valve driving mechanism 2 drives the valve core 8 to rotate to a fixed position, the air can be supplied to the air inlet part 400 through the action of each first electromagnetic valve 16, the air enters the first air passage 1050 and the inner cavity 102 through the second air passage 1201, so that the sealing structure 1 is inflated, the gap between the valve core 8 and the valve body 4 is sealed after inflation, and the sealing body 100 in the sealing structure 1 is annularly arranged along the circumferential direction, so that the gap around the passage opening of the second passage 800 in the valve core 8 is completely sealed, the material is prevented from entering the inside of the valve body 4, the rotation of the valve core 8 is prevented from being influenced, no accumulation and no leakage are caused, and the sealing structure is safe and reliable.

Further, please continue referring to fig. 7 to 8, when the material needs to be commutated, the first electromagnetic valve 16 is used to control the gas in the inner cavity 102 of the sealing body 100 to be discharged, the volume of the sealing body 100 is reduced to ensure that the valve core 8 can rotate normally, the valve core 8 is controlled to rotate and commutate by the air valve driving mechanism 2, the valve core 8 rotates for 1350 ° as shown in fig. 8, the second channel 800 of the valve core 8 is connected with the other connecting pipe 5, and then the first electromagnetic valve 16 is connected with the gas source 14 to supply gas after the valve core 8 is in place, so as to realize the expansion of the volume of the sealing body 100 again, so as to realize the sealing of the channel opening of the second channel 800 in the valve core 8 along the circumferential direction, namely, the sealing between the valve core 8 and the valve body 4. During operation, when the pressure detection alarm switch 19 detects that the pressure value is lower than the set value, the abrasion of the sealing structure 1 is indicated to be replaced.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples illustrate only a few embodiments of the utility model, which are described in detail and are not to be construed as limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.

Claims (10)

1. A sealing structure, characterized in that: the sealing structure comprises a sealing body with an inner cavity, the sealing body is arranged into a ring shape along the circumferential direction, at least one first hole is formed in the sealing body, at least two protruding parts are arranged outside the sealing body, a first air passage is formed in each protruding part, and the first air passage is communicated with the inner cavity through the first hole.

2. A seal arrangement as claimed in claim 1, wherein: the one end that the bulge was kept away from the seal body still offers the opening.

3. A seal arrangement as claimed in claim 2, wherein: the projection is located near one end of the seal body and also extends radially to form a step on the seal body.

4. A seal arrangement as claimed in claim 3, wherein: the outside of the sealing body is provided with a first inclined plane.

5. A seal arrangement as claimed in claim 1, wherein: the first holes are conical holes, and the diameters of the first holes are gradually decreased along the inflow direction of the gas.

6. The utility model provides a switching-over valve, the switching-over valve includes the valve body that has a plurality of first passageways, the case pass through the pneumatic valve actuating mechanism rotationally set up in the valve body, the inside of case has the second passageway, every first passageway all has the takeover, and the one end that every takeover stretches out first passageway all connects the material pipe, its characterized in that: a first ceramic pipe is arranged at the inner side of the second channel, a second ceramic pipe is arranged at the inner side of each connecting pipe, a first fixing piece and a second fixing piece are respectively arranged between the outer side of each connecting pipe and the inner side of the valve body, the sealing structure according to any one of claims 1-5 is arranged between the first fixing piece and the second fixing piece, and the first fixing piece, the sealing structure and the second fixing piece are connected with a flange together.

7. A reversing valve as set forth in claim 6, wherein: the outside of flange sets up the portion of admitting air, the inside of flange offer can with the second air flue that the portion of admitting air is connected, the one end that the portion of admitting air was kept away from to the second air flue is connected with seal structure's first air flue.

8. A reversing valve as set forth in claim 7, wherein: the air inlet end of the air inlet part is connected with the air outlet end of the pneumatic linkage part through a first electromagnetic valve, the air inlet end of the pneumatic linkage part is connected with an air source, the air outlet end of the pneumatic linkage part is also connected with the air inlet end of a second electromagnetic valve, the air outlet end of the second electromagnetic valve is connected with the air inlet end of an air valve driving mechanism, and the air outlet end of the air valve driving mechanism is also connected with the air inlet end of the second electromagnetic valve.

9. A reversing valve as set forth in claim 8, wherein: and the first electromagnetic valve or the second electromagnetic valve is provided with a silencer.

10. A reversing valve as set forth in claim 6, wherein: the thickness of the first ceramic tube and the second ceramic tube is 10 mm-12 mm.