Detachable hard sealing valve

Abstract

The utility model belongs to the technical field of valves, and provides a detachable hard sealing valve which comprises a valve body, a cylindrical valve element, a rotating shaft, stacked rings, O-shaped rings and a bent plate. The valve body comprises a shell and an end cover; shaft stacked rings and hole stacked rings which are arranged in a stacked mode are arranged between the outer walls of the front end and the rear end of the cylindrical valve element and the inner walls of the round holes in the front end and the rear end of the shell; the two end covers are installed at the round holes in the front end and the rear end of the shell respectively, and O-shaped rings are arranged between the outer walls of the end covers and the inner walls of the round holes. The two bent plates are arranged on the two rib plates on the inner wall of the shell respectively, the inner ends of the two bent plates make close contact with the outer wall face of the cylindrical valve element to form a sealing pair, and the bent plates and the rib plates are detachably connected through a plurality of bolts. The elastic structure of the multiple stacked rings has a compensation effect on use abrasion, the long-strip-shaped bolt insertion holes in the bent plates enable the pressing structure to be adjustable, the sealing structure of the valve is easy and convenient to disassemble, a sealing piece is resistant to abrasion, the service life is long, and the sealing effect on powdery substances is good.

Description

TECHNICAL FIELD

[0001] The utility model belongs to valve technical field, concretely relates to a detachable hard sealing valve. BACKGROUND

[0002] Various valves are widely used in the solid material conveying process, such as ball valve, gate valve, stop valve, butterfly valve and the like. The valve on the market is divided into two kinds of soft sealing and hard sealing, the soft sealing is sealed by rubber or polytetrafluoroethylene, in the case of frequent use, the sealing element is easy to wear, leading to the valve not to close, the ball valve and sealing element are difficult to disassemble after use, leading to incomplete cleaning, in addition, the traditional adhesive wool felt sealing mode, wool felt is easy to wear and fall off, after the wool felt wears and falls off in the desulfurization and dust removal environmental protection equipment, the valve produces internal leakage, which may finally affect the environmental protection index, and the emission is not up to standard. It cannot meet the demand of long-term stable operation. In order to make the whole desulfurization and dust removal system more stable and reliable in operation, the service life of the valve needs to be improved, especially the problem that the wool felt sealing element is easy to wear and leads to internal leakage of the valve. The hard sealing has good wear resistance, can effectively reduce the wear caused by frequent friction, greatly reduces the failure probability, ensures the stable operation of the desulfurization system, reduces the number of unplanned shutdown, and guarantees the production continuity. CONTENT OF THE UTILITY MODEL

[0003] In view of the deficiencies of the prior art, the utility model provides a detachable hard sealing valve, the valve sealing is simple and convenient to disassemble, the ring stacking sealing element and the bending plate sealing pair are wear-resistant, and the sealing effect on the powdery substance is good.

[0004] The utility model discloses the following technical scheme realizes:

[0005] A detachable hard sealing valve, including the valve body, the cylindrical valve core rotationally arranged in the valve body and the rotating shaft coaxially installed on the cylindrical valve core, the rotating shaft is used for controlling the rotation of the cylindrical valve core in the valve body, the opening degree is adjusted, the material flow can be adjusted, the valve body includes the shell and two end covers, the upper and lower ends of the shell are formed with the material inlet and outlet, the front and rear ends of the shell are formed with the round hole for installing the end cover, the left and right inner walls of the top end of the shell are provided with the rib plate, the outer wall surface of the cylindrical valve core is in clearance contact with the inner end of the two rib plates, and the two ends are in clearance fit with the two end covers.

[0006] The valve also includes a ring and a bending plate.

[0007] The inner wall of the circular hole at the front and rear ends of the shell is provided with a first annular groove, a plurality of stacked rings are arranged in each first annular groove, the stacked rings are sleeved on the cylindrical valve core, the stacked rings are divided into shaft stacked rings and hole stacked rings, the natural inner diameter of the shaft stacked ring is smaller than the outer diameter of the cylindrical valve core, the natural outer diameter of the hole stacked ring is larger than the diameter of the groove bottom of the first annular groove, the plurality of stacked rings in the first annular groove include at least one shaft stacked ring and at least one hole stacked ring, after the shaft stacked ring and the hole stacked ring are installed between the cylindrical valve core and the shell, the shaft stacked ring can tightly hold the cylindrical valve core, and the hole stacked ring can be tightly expanded in the first annular groove, the plurality of stacked rings form a labyrinth seal between the outer wall of the cylindrical valve core and the inner wall of the circular hole, and the sealing effect can be improved.

[0008] The two bending plates are arranged on the two rib plates, the inner ends of the two bending plates are in close contact with the outer wall surface of the cylindrical valve core to form a sealing pair, the bending plate and the rib plate are detachably connected through a plurality of bolts, the bolt insertion hole formed in the bending plate is a long slot, and when the inner end of the bending plate is worn, the inner end of the bending plate can be polished and moved along the bolt insertion hole, so that the inner end is in close contact with the outer wall surface of the cylindrical valve core to form a sealing pair, and sealing repair can be performed.

[0009] Further, two shaft stacked rings are embedded and installed in each first annular groove, and one hole stacked ring is installed between the two shaft stacked rings, and the two shaft stacked rings and the one hole stacked ring are staggered and stacked to form a seal.

[0010] Further, the outer side wall of the end cover is provided with a second annular groove, and an O-shaped ring is embedded and installed in the second annular groove, the natural outer diameter of the O-shaped ring is greater than the inner diameter of the circular hole, and the natural inner diameter of the O-shaped ring is smaller than the diameter of the groove bottom of the second annular groove, so that the O-shaped ring can seal the gap between the end cover and the inner wall of the circular hole of the shell.

[0011] Further, the inner end of each bending plate is integrally formed with a bending part, so that the close contact effect between the bending part and the cylindrical valve core is good, wear-resistant, and can be polished and repaired after wear.

[0012] Further, the shaft stacked ring and the bending plate are made of hard sealing material, and the hard sealing material includes but is not limited to stainless steel 304, stainless steel 316, stainless steel 316Ti or spring steel, etc., has good wear resistance, can improve the service life of the valve, and the O-shaped ring is made of rubber material.

[0013] From the above technical solution, the detachable hard sealing valve provided by the utility model has the beneficial effects that:

[0014] The valve is assembled structure, the labyrinth seal is formed between the two ends of the cylindrical valve core and the shell of the valve body by using multiple stacked rings, the seal is formed between the end cover of the valve body and the shell by using O ring, the elastic structure of the stacked ring for shaft, the stacked ring for hole and the O ring itself makes it convenient to disassemble and assemble, and has certain compensation for wear and tear, the long bolt insertion hole on the bending plate makes the compression structure on the rib plate adjustable, the machining precision is easy to achieve, and the bending plate can be polished and moved to repair the seal between the bending plate and the cylindrical valve core after wear and tear, compared with the existing valve seal structure, the service life of the hard seal valve structure is long, the sealing element is wear-resistant, and the valve is not easy to leak; the valve is improved based on the existing valve, the valve seal is easy to disassemble and assemble, the sealing effect of the valve on the powdery substance is good, the valve runs stably and will not be stuck, the stability and reliability are greatly improved, and the problems of wear and tear and falling of traditional wool felt seal are solved. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the specific embodiment of the utility model or the technical scheme in the prior art, the drawings needed to be used in the specific embodiment or the prior art description will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, each element or part is not necessarily drawn according to the actual proportion.

[0016] Figure 1 It is a structural schematic diagram of the utility model.

[0017] Figure 2 It is a three-dimensional structural schematic diagram of the utility model.

[0018] Figure 3 It is a radial sectional structural schematic diagram of the utility model.

[0019] Figure 4 It is an explosive structural schematic diagram of the utility model.

[0020] Figure 5 It is Figure 1 It is an enlarged structural schematic diagram of the main view direction of A in the middle.

[0021] In the drawings: 1-valve body, 1.1-shell, 1.2-end cover, 1.3-rib plate, 2-cylindrical valve core, 3-rotating shaft, 4-first annular groove, 5-stacked ring, 5.1-stacked ring for shaft, 5.2-stacked ring for hole, 6-second annular groove, 7-O ring, 8-copper sleeve sliding bearing, 9-oil seal with auxiliary lip, 10-flat key, 11-bending plate, 12-bolt insertion hole, 13-bending part. Specific embodiment

[0022] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the present invention and should not be construed as limiting the scope of protection of the present invention.

[0023] In the description of this application, it should be understood that the terms "upper", "lower", "top", "bottom", "inner", "outer", "front", "back", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0024] like Figures 1 to 5 As shown, a detachable hard-seal valve mainly consists of a valve body 1, a cylindrical valve core 2, a rotating shaft 3, a flat key 10, a copper sleeve sliding bearing 8, an oil seal with a secondary lip 9, a stacked ring 5, an O-ring 7, and a bending plate 11.

[0025] The valve body 1 includes a housing 1.1 and two end caps 1.2. Material inlets and outlets are formed at the upper and lower ends of the housing 1.1, and circular holes for installing the end caps 1.2 are formed at its front and rear ends. The inner wall of the circular holes has an annular step. The inner end of the end cap 1.2 has a stepped annular plate structure that extends into the circular holes and engages with the annular step inside the holes. Ribs 1.3 are provided on the left and right inner walls of the top of the housing 1.1. A cylindrical valve core 2 is rotatably disposed inside the valve body 1, and the outer wall surface of the cylindrical valve core 2 is in clearance contact with the inner ends of the two ribs 1.3. A rotating shaft 3 is inserted inside the cylindrical valve core 2, and both ends of the rotating shaft 3 are fixedly connected to both ends of the cylindrical valve core 2 by a flat key 10. The rotating shaft 3 is used for... The control cylinder valve core 2 rotates within the valve body 1 to open and close the valve. The rotation of the cylinder valve core 2 adjusts the opening degree, thereby regulating the material flow rate. The two ends of the rotating shaft 3 pass through the two end covers 1.2, and the rotating shaft 3 and the end covers 1.2 are rotatably connected by copper sleeve sliding bearings 8. Both ends of the copper sleeve sliding bearings 8 are provided with oil seals with auxiliary lips 9 to form a seal between the rotating shaft 3 and the end covers 1.2. In addition, a limiting end cover (not shown in the figure) is installed on the outer wall of each end cover 1.2 to axially limit the rotating shaft 3 and ensure the stability of the rotating shaft 3. The above-mentioned installation structure of the valve core, rotating shaft 3, and end covers 1.2 on the housing 1.1 is a conventional structure of existing valves and will not be described in detail here.

[0026] The inner wall of the circular hole at the front and rear ends of the shell 1.1 is provided with a first annular groove 4, a plurality of stacked rings 5 are arranged in each first annular groove 4, and the stacked rings 5 are sleeved on the cylindrical valve core 2. The stacked rings 5 are divided into shaft stacked rings 5.1 and hole stacked rings 5.2. The natural inner diameter of the shaft stacked ring 5.1 is smaller than the outer diameter of the cylindrical valve core 2, and the natural outer diameter of the hole stacked ring 5.2 is greater than the groove bottom diameter of the first annular groove 4. Among the plurality of stacked rings 5 in the first annular groove 4, there are at least one shaft stacked ring 5.1 and at least one hole stacked ring 5.2. After the shaft stacked ring 5.1 and the hole stacked ring 5.2 are installed between the cylindrical valve core 2 and the shell 1.1, the shaft stacked ring 5.1 can tightly hold the cylindrical valve core 2, and the hole stacked ring 5.2 can be tightly expanded in the first annular groove 4, as shown in Figure 5 The plurality of stacked rings 5 form a labyrinth seal between the outer wall of the cylindrical valve core 2 and the inner wall of the circular hole, which can improve the sealing effect.

[0027] Two end covers 1.2 are respectively installed at the circular holes at the front and rear ends of the shell 1.1, and the two ends of the cylindrical valve core 2 are gap-fitted with the two end covers 1.2. An O-ring 7 is arranged between the outer wall of the end cover 1.2 and the inner wall of the circular hole. A second annular groove 6 for installing the O-ring 7 is formed in the outer side wall of the end cover 1.2. The natural outer diameter of the O-ring 7 is greater than the hole diameter of the circular hole, and the inner diameter thereof is smaller than the groove bottom diameter of the second annular groove 6. After the O-ring 7 is installed between the end cover 1.2 and the shell 1.1, it can be expanded tightly. After the two end covers 1.2 are installed on the shell 1.1, a seal is formed between the outer wall thereof and the inner wall of the circular hole to seal the valve body 1. The O-ring 7 is made of rubber material.

[0028] The bending plate 11 is provided with two, and the two bending plates 11 are respectively arranged on the two rib plates 1.3. The inner ends of the two bending plates 11 are in close contact with the outer wall surface of the cylindrical valve core 2 to form a sealing pair. The bending plate 11 is detachably connected with the rib plate 1.3 through a plurality of bolts, and the bolt insertion hole 12 formed in the bending plate 11 is a long slot. When the inner end of the bending plate 11 is worn, the inner end of the bending plate 11 can be polished and the bending plate 11 can be moved along the bolt insertion hole 12 so that the inner end is in close contact with the outer wall surface of the cylindrical valve core 2 to form a sealing pair. In this way, the sealing can be repaired.

[0029] Preferably, in the embodiment, as shown in Figure 1 and Figure 5As shown, two shaft rings 5.1 are embedded in each first annular groove 4, and a hole ring 5.2 is installed between the two shaft rings 5.1. The two shaft rings 5.1 and the hole ring 5.2 form a labyrinth seal between the outer wall of the cylindrical valve core 2 and the inner wall of the circular hole, which can improve the sealing effect. In addition, the combination structure of the shaft ring 5 can also be two shaft rings 5.1 and two hole rings 5.2, three shaft rings 5.1 and two hole rings 5.2, three shaft rings 5.1 and three hole rings 5.2, etc.

[0030] Preferably, in the embodiment, as shown, Figure 3 The inner end of each bending plate 11 is integrally formed with a bending portion 13, which is in close contact with the cylindrical valve core 2, has good wear resistance, and can be polished and repaired after wear.

[0031] Preferably, in the embodiment, the shaft ring 5 and the bending plate 11 are made of hard sealing material, which includes but is not limited to stainless steel 304, stainless steel 316, stainless steel 316Ti, or spring steel, etc. The hard sealing material has good wear resistance and can improve the service life of the valve. The shaft ring 5 is a conventional ring structure, and its specific structure and working principle are the same as those of the conventional ring, which will not be described here.

[0032] The working principle of the embodiment is as follows:

[0033] The valve is an assembled structure, and the rotating shaft 3 is fixedly installed on the cylindrical valve core 2. The rotating shaft 3 and the cylindrical valve core 2 can be installed inside the housing 1.1 from the circular hole at the front end or the rear end of the housing 1.1. The front and rear ends of the cylindrical valve core 2 and the circular holes at the front and rear ends of the housing 1.1 form a labyrinth seal with two shaft rings 5 and a hole ring 5.1. The end cover 1.2 of the valve body 1 and the housing 1.1 form a seal with an O-ring 7. The elastic structure of the shaft ring 5.1, the hole ring 5.2, and the O-ring 7 itself makes it easy to disassemble and has a certain compensation for wear. The bending plates 11 are installed on the two rib plates 1.3 at the top end of the housing 1.1. The inner ends of the two bending plates 11 are in close contact with the outer wall of the cylindrical valve core 2 to form a sealing pair. The bending plates 11 are detachably connected to the rib plates 1.3 by passing through a plurality of bolts. The bolt insertion hole 12 on the bending plate 11 is a long slot, which makes the compression structure on the rib plate 1.3 adjustable, and the machining precision is easy to achieve. The bending plate 11 is easy to disassemble and can be polished and moved to repair the seal between the cylindrical valve core 2 after wear. Compared with the existing valve sealing structure, the hard sealing valve structure has a long service life, the sealing element is wear-resistant, and the valve is less likely to leak. The improved valve has a simple and convenient door sealing disassembly, good sealing effect for powdery substances, stable operation, and high stability and reliability.

[0034] In addition, by improving the machining precision and fitting precision, a single or other multiple number of stacked rings (for holes or shafts) can be used for sealing.

[0035] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, and are not limited thereto; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can still be modified, or some or all of the technical features can be replaced by equivalents; and these modifications or replacements do not change the essence of the corresponding technical solutions from the technical solutions of the embodiments of the present application, and they should be covered in the scope of the claims and the specification of the present application.

Claims

1. A detachable hard-seal valve, comprising a valve body (1), a cylindrical valve core (2) rotatably disposed inside the valve body (1), and a rotating shaft (3) coaxially mounted on the cylindrical valve core (2). The valve body (1) comprises a housing (1.1) and two end caps (1.2). Material inlets and outlets are formed at the upper and lower ends of the housing (1.1), and circular holes for installing the end caps (1.2) are formed at its front and rear ends. Ribs (1.3) are provided on the left and right inner walls of the top of the housing (1.1). The outer wall surface of the cylindrical valve core (2) is in clearance contact with the inner ends of the two ribs (1.3), and its two ends are in clearance fit with the two end caps (1.2). The valve body (1) is characterized in that: The valve also includes a stacked ring (5) and a bent plate (11); The inner walls of the circular holes at both ends of the housing (1.1) are provided with first annular grooves (4). Multiple stacked rings (5) are stacked in each first annular groove (4), and the stacked rings (5) are fitted on the cylindrical valve core (2). The stacked rings (5) are divided into shaft stacked rings (5.1) and hole stacked rings (5.2). The natural inner diameter of the shaft stacked rings (5.1) is smaller than the outer diameter of the cylindrical valve core (2), and the natural outer diameter of the hole stacked rings (5.2) is larger than the bottom diameter of the first annular groove (4). The multiple stacked rings (5) in the first annular groove (4) include at least one shaft stacked ring (5.1) and at least one hole stacked ring (5.2). Two bending plates (11) are provided, and the two bending plates (11) are respectively provided on two stiffening plates (1.3). The inner ends of the two bending plates (11) are in close contact with the outer wall surface of the cylindrical valve core (2) to form a sealing pair. The bending plates (11) and the stiffening plates (1.3) are detachably connected by multiple bolts, and the bolt holes (12) opened on the bending plates (11) are elongated holes.

2. The detachable hard-seal valve according to claim 1, characterized in that: Two shaft stacked rings (5.1) are embedded in each of the first annular grooves (4), and a hole stacked ring (5.2) is installed between the two shaft stacked rings (5.1).

3. The detachable hard-seal valve according to claim 1, characterized in that: The outer side wall of the end cap (1.2) is provided with a second annular groove (6), and an O-ring (7) is embedded in the second annular groove (6). The O-ring (7) is used to seal the gap between the end cap (1.2) and the inner wall of the circular hole on the shell (1.1).

4. The detachable hard-seal valve according to claim 1, characterized in that: Each of the bending plates (11) has an integrally formed bending portion (13) at its inner end.

5. The detachable hard-seal valve according to claim 3, characterized in that: The shaft ring (5.1), the hole ring (5.2), and the bending plate (11) are all made of hard sealing material.

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