Dome valve used for removing ash and facilitating replacement of valve element

Abstract

The utility model relates to the technical field of dome valves, in particular to an ash removing dome valve with a valve element convenient to replace. The ash removing dome valve comprises a valve seat, a valve cover, a sealing ring, a rotating shaft, the valve element and a driving mechanism, the valve element comprises an upper element body and a lower element body, the lower element body is connected to the rotating shaft, the upper element body is connected with an inserting ring plate, and the lower element body is provided with an inserting groove; a connecting assembly is arranged between the upper core body and the lower core body and comprises a mounting cylinder, a cylinder cover, a locking rod, a shifting block, a spring and a fixing plate, the mounting cylinder is connected to the lower core body, the cylinder cover is connected to the mounting cylinder, the locking rod is arranged among the cylinder cover, the mounting cylinder and the lower core body in a penetrating mode, a locking hole is formed in the inserting ring plate, and the shifting block is connected to the end of the locking rod. The fixing plate is fixedly connected to the rod body, the locking rod is sleeved with the spring, the spring is located between the fixing plate and the barrel cover, and a locking assembly is further arranged between the upper core body and the lower core body. The valve element assembly has the effect of solving the problem that the maintenance cost and the maintenance workload of a user are increased due to replacement of the whole valve element assembly.

Description

Technical Field

[0001] The utility model relates to the field of dome valve technology, in particular to a dome valve for ash removal, the valve core of which is easy to replace. Background Art

[0002] Dome valve is an indispensable stop valve in the comprehensive utilization of fly ash in thermal power plants. Due to the special working conditions of the thermal power ash removal system (high speed, high dust concentration, strong material abrasion, high temperature, and high system reliability requirements), the valve, as a key component of the thermal power ash removal system, is easily worn out at the sealing part due to material erosion and corrosion. It is necessary to inspect and replace the internal core structure of the valve from time to time to ensure the normal use of the valve and avoid the reduction or even failure of the valve switching performance due to damage to the valve core, which will cause the entire ash removal system to stop operating and affect the normal operation of the entire production system.

[0003] After market research and tests, it was found that the dome valve in the ash removal system was mainly damaged by the top of the valve core, while the valve core in the original valve structure was basically an integrated structure. After the top of the valve core was damaged, the entire valve core assembly needed to be replaced, which increased the user's maintenance cost and repair workload. Utility Model Content

[0004] In order to improve the problem of increasing the user's maintenance cost and repair workload due to replacement of a whole set of valve core components, the present application provides a dome valve for ash removal with an easy-to-replace valve core.

[0005] The present application provides a dome valve for ash removal that is easy to replace the valve core and adopts the following technical solution:

[0006] A dome valve for ash removal and easy replacement of valve core, comprising a valve seat, a valve cover connected to the top of the valve seat, a sealing ring arranged on the valve cover, a rotating shaft arranged in the valve seat, a valve core arranged on the rotating shaft, and a driving mechanism arranged on the valve seat for driving the rotating shaft, wherein the valve core comprises an upper core body and a lower core body, the lower core body is arranged in a cylindrical shape, the lower core body is connected to the rotating shaft, the upper core body is arranged in a hollow hemispherical shape, a plug-in ring plate is connected to the upper core body, a plug-in groove for inserting the plug-in ring plate is opened on the lower core body, a connecting assembly is arranged between the upper core body and the lower core body, the connecting assembly comprises a mounting cylinder, a cylinder cover, a locking rod, a shift block, a spring and a fixing plate, the mounting cylinder is connected to the On the inner wall of the lower core body, the mounting tube is arranged in a direction perpendicular to the axis of the lower core body, and the mounting tube is respectively provided with one on the inner walls on both sides opposite to each other of the lower core body, and the axes of the two mounting tubes are collinear, and the tube cover is connected to the tube mouth of the mounting tube, and the locking rod is penetrated between the tube cover, the mounting tube and the lower core body, and a locking hole for inserting the locking rod is opened on the plug-in ring plate, and the shift block is connected to the end of the locking rod close to the tube cover, and the fixing plate is fixedly connected to the rod body of the locking rod located in the mounting tube, and the spring is sleeved on the rod body of the locking rod located in the mounting tube, and the spring is located between the fixing plate and the tube cover, and a locking component for locking the upper core body and the lower core body is also provided between the upper core body and the lower core body.

[0007] Preferably, the locking assembly includes a bidirectional threaded rod, a fixing block, a first threaded sleeve, a second threaded sleeve, a guide rod, a fixing ring and a locking ring, the first threaded sleeve and the second threaded sleeve are both connected to the bidirectional threaded rod, the first threaded sleeve and the second threaded sleeve are respectively arranged at two ends of the bidirectional threaded rod, the guide rod is fixedly connected to the first threaded sleeve, the guide rod is arranged along the length direction of the first threaded sleeve and extends toward the second threaded sleeve, the guide rod is respectively provided with one on two opposite sides of the first threaded sleeve, the fixing ring is fixedly connected to the second threaded sleeve, Two fixing rings corresponding to the guide rods are provided on the second threaded sleeve, and the guide rod is slidably inserted into the fixing ring. The locking ring is respectively provided at the two opposite ends of the first threaded sleeve and the second threaded sleeve. The two locking rings are located in the same plane, and the two opposite side walls of the locking rings are provided with grooves. The upper core body is connected with an upper clamping ring, and the upper clamping ring is respectively provided on the two opposite sides of the inner wall of the upper core body. The lower core body is connected with a lower clamping ring, and the lower clamping ring is respectively provided on the two opposite sides of the inner wall of the lower core body. The upper clamping ring and the lower clamping ring can be assembled with each other and clamped into the grooves.

[0008] Preferably, the locking ring is arranged in a one-third circular ring shape, and the slot does not penetrate through the two end faces of the locking ring.

[0009] Preferably, the cross-section of the clamping groove is arranged in an isosceles trapezoid, and the cross-sections of the upper clamping ring and the lower clamping ring are arranged in a right-angled trapezoid.

[0010] Preferably, a linear bearing is connected to the fixing ring, the linear bearing is located in a ring hole of the fixing ring, and the guide rod is inserted into the linear bearing.

[0011] Preferably, a connecting pipe is provided on the lower core body, and the connecting pipe is connected to the rotating shaft through bolts.

[0012] In summary, this application includes the following beneficial technical effects:

[0013] The utility model provides a dome valve for ash removal with an easy-to-replace valve core. The valve core is arranged as a split structure of an upper core body and a lower core body. When an end of the valve core is damaged, only the upper core body needs to be replaced. The upper core body can be quickly disassembled and assembled through a connecting assembly and a locking assembly, thereby achieving the effect of improving the problem of increased maintenance costs and repair workload for users caused by replacing the entire set of valve core components. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of a dome valve for removing ash and slag and facilitating replacement of the valve core in an embodiment of the present application;

[0015] Figure 2 is a schematic diagram for illustrating the lower core in an embodiment of the present application;

[0016] Figure 3 is a schematic diagram for illustrating the upper core in an embodiment of the present application;

[0017] Figure 4 It is a schematic diagram used to illustrate the locking assembly in the embodiment of the present application.

[0018] Explanation of the reference numerals in the accompanying drawings: 1. valve seat; 11. driving mechanism; 2. valve cover; 3. sealing ring; 4. rotating shaft; 5. valve core; 51. upper core body; 511. plug-in ring plate; 512. upper retaining ring; 52. lower core body; 521. lower retaining ring; 522. connecting pipe; 6. connecting assembly; 61. mounting cylinder; 62. cylinder cover; 63. locking rod; 64. shift block; 65. spring; 66. fixing plate; 7. locking assembly; 71. bidirectional threaded rod; 72. fixing block; 73. first threaded sleeve; 74. second threaded sleeve; 75. guide rod; 76. fixing ring; 761. linear bearing; 77. locking ring; 771. slot. DETAILED DESCRIPTION

[0019] In order to enable those skilled in the art to better understand the scheme of the utility model, the scheme in the embodiment of the utility model will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiment is only an embodiment of a part of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work should fall within the scope of protection of the utility model.

[0020] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention; the terms "first", "second", and "third" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance. In addition, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two original components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0021] The present application discloses a dome valve for ash removal, which is easy to replace the valve core. Figure 1-Figure 4The dome valve for removing ash and slag and conveniently replacing the valve core comprises a valve seat 1, a valve cover 2 connected to the top of the valve seat 1, a sealing ring 3 arranged on the valve cover 2, a rotating shaft 4 arranged in the valve seat 1, a valve core 5 arranged on the rotating shaft 4, and a driving mechanism 11 arranged on the valve seat 1 for driving the rotating shaft 4, the valve core 5 comprises an upper core body 51 and a lower core body 52, the lower core body 52 is arranged in a cylindrical shape, the lower core body 52 is connected to the rotating shaft 4, the upper core body 51 is arranged in a hollow hemispherical shape, a plug-in ring plate 511 is connected to the upper core body 51, and a plug-in groove for inserting the plug-in ring plate 511 is opened on the lower core body 52, a connecting assembly 6 is arranged between the upper core body 51 and the lower core body 52, and the connecting assembly 6 comprises a mounting cylinder 61, a cylinder cover 62, a locking rod 63, a shift block 64, and a spring 65. and a fixing plate 66, the mounting tube 61 is connected to the inner wall of the lower core body 52, the mounting tube 61 is arranged in a direction perpendicular to the axis of the lower core body 52, the mounting tube 61 is respectively provided with one on the inner walls on both sides opposite to each other of the lower core body 52, the axes of the two mounting tubes 61 are collinear, the tube cover 62 is connected to the tube mouth of the mounting tube 61, the locking rod 63 is penetrated between the tube cover 62, the mounting tube 61 and the lower core body 52, a locking hole for inserting the locking rod 63 is opened on the plug-in ring plate 511, the shift block 64 is connected to the end of the locking rod 63 close to the tube cover 62, the fixing plate 66 is fixedly connected to the rod body of the locking rod 63 located in the mounting tube 61, the spring 65 is sleeved on the rod body of the locking rod 63 located in the mounting tube 61, and the spring 65 is located between the fixing plate 66 and the tube cover 62.

[0022] A locking assembly 7 for locking the two is also provided between the upper core body 51 and the lower core body 52. ​​The locking assembly 7 includes a bidirectional threaded rod 71, a fixing block 72, a first threaded sleeve 73, a second threaded sleeve 74, a guide rod 75, a fixing ring 76 and a locking ring 77. The first threaded sleeve 73 and the second threaded sleeve 74 are both connected to the bidirectional threaded rod 71. The first threaded sleeve 73 and the second threaded sleeve 74 are respectively arranged at both ends of the bidirectional threaded rod 71. The guide rod 75 is fixedly connected to the first threaded sleeve 73. The guide rod 75 is arranged along the length direction of the first threaded sleeve 73 and extends toward the second threaded sleeve 74. The guide rod 75 is respectively provided on two opposite sides of the first threaded sleeve 73. The fixing ring 76 is fixedly connected On the second threaded sleeve 74, two fixing rings 76 are provided on the second threaded sleeve 74 corresponding to the guide rods 75, and the guide rods 75 are slidably penetrated in the fixing ring 76. A locking ring 77 is respectively provided at the two opposite ends of the first threaded sleeve 73 and the second threaded sleeve 74. The two locking rings 77 are located in the same plane, and grooves 771 are provided on the opposite side walls of the two locking rings 77. An upper snap ring 512 is connected to the upper core body 51, and the upper snap ring 512 is respectively provided on the two opposite sides of the inner wall of the upper core body 51. A lower snap ring 521 is connected to the lower core body 52, and the lower snap ring 521 is respectively provided on the two opposite sides of the inner wall of the lower core body 52. ​​The upper snap ring 512 and the lower snap ring 521 can be assembled with each other and snapped into the groove 771.

[0023] The locking ring 77 is arranged in a one-third circular ring shape, which is conducive to improving the locking effect. The clamping groove 771 does not penetrate the two end surfaces of the locking ring 77, and the clamping groove 771 has a limiting effect on the upper clamping ring 512 and the lower clamping ring 521.

[0024] The cross-section of the retaining groove 771 is arranged in an isosceles trapezoid, and the cross-sections of the upper retaining ring 512 and the lower retaining ring 521 are arranged in a right-angled trapezoid. When the two locking rings 77 move in opposite directions, the above arrangement can convert the lateral pressure into a downward pressure on the upper retaining ring 512 and an upward pressure on the lower retaining ring 521, thereby locking the upper retaining ring 512 and the lower retaining ring 521.

[0025] A linear bearing 761 is connected to the fixing ring 76 . The linear bearing 761 is located in the ring hole of the fixing ring 76 . The guide rod 75 is passed through the linear bearing 761 . The linear bearing 761 is helpful to improve the smoothness of the movement of the guide rod 75 .

[0026] A connecting pipe 522 is provided on the lower core body 52 , and the connecting pipe 522 is connected to the rotating shaft 4 through bolts. The connecting pipe 522 facilitates the detachable connection of the lower core body 52 .

[0027] The implementation principle of a dome valve for ash removal and easy replacement of the valve core in the embodiment of the present application is as follows: during installation, the lower core body 52 is rotated downward, and then the shift block 64 is pulled to make the locking rod 63 withdraw from the plug-in groove, and then the plug-in ring plate 511 of the upper core body 51 is inserted into the plug-in groove of the lower core body 52, and then the upper core body 51 is rotated. When the locking rod 63 is aligned with the locking hole, the spring 65 pushes the fixing plate 66 to drive the locking rod 63 to be inserted into the locking hole. At this time, the upper snap ring 512 is aligned with the lower snap ring 521, and then a locking ring 77 in the locking assembly 7 is matched with the upper snap ring 512 and the lower snap ring 521 on one side, and then the fixing block 72 is rotated. Under the limitation of the guide rod 75 and the fixing ring 76, the bidirectional threaded rod 71 can make the first threaded sleeve 73 and the second threaded sleeve 74 move and extend to both sides, so that the other locking ring 77 is matched with the upper snap ring 512 and the lower snap ring 521 on the other side until the fixing block 72 cannot rotate.

[0028] When disassembling, first rotate the lower core 52 downward, then rotate the fixing block 72 in the opposite direction to retract the two locking rings 77, and then pull the shift block 64 to make the locking rod 63 escape from the locking hole, and then the upper core 51 can be directly disassembled.

[0029] Finally, it should be noted that the above is only the preferred implementation of the utility model, and the protection scope of the utility model is not limited to the above embodiments. All technical solutions under the idea of ​​the utility model belong to the protection scope of the utility model. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the utility model should also be regarded as the protection scope of the utility model.

Claims

1. A dome valve for ash removal with a valve core that is easy to replace, comprising a valve seat (1), a valve cover (2) connected to the top of the valve seat (1), a sealing ring (3) arranged on the valve cover (2), a rotating shaft (4) arranged in the valve seat (1), a valve core (5) arranged on the rotating shaft (4), and a driving mechanism (11) arranged on the valve seat (1) for driving the rotating shaft (4). Features: The valve core (5) comprises an upper core body (51) and a lower core body (52), wherein the lower core body (52) is cylindrical and connected to the rotating shaft (4), and the upper core body (51) is hollow and hemispherical, wherein a plug-in ring plate (511) is connected to the upper core body (51), and a plug-in groove for inserting the plug-in ring plate (511) is provided on the lower core body (52), and a connecting assembly (6) is provided between the upper core body (51) and the lower core body (52), wherein the connecting assembly (6) comprises a mounting cylinder (61), a cylinder cover (62), a locking rod (63), a shifting block (64), a spring (65) and a fixing plate (66), wherein the mounting cylinder (61) is connected to the inner wall of the lower core body (52), and the mounting cylinder (61) is arranged along an axial direction perpendicular to the lower core body (52), and the mounting cylinder (61) is arranged on the lower core body (52) ) are respectively provided on the inner walls on both sides opposite to each other, the axes of the two mounting cylinders (61) are collinear, the cylinder cover (62) is connected to the cylinder mouth of the mounting cylinder (61), the locking rod (63) is inserted between the cylinder cover (62), the mounting cylinder (61) and the lower core body (52), the plug-in ring plate (511) is provided with a locking hole for the locking rod (63) to be inserted, the shift block (64) is connected to the end of the locking rod (63) close to the cylinder cover (62), the fixing plate (66) is fixedly connected to the rod body of the locking rod (63) located in the mounting cylinder (61), the spring (65) is sleeved on the rod body of the locking rod (63) located in the mounting cylinder (61), the spring (65) is located between the fixing plate (66) and the cylinder cover (62), and a locking assembly (7) for locking the upper core body (51) and the lower core body (52) is also provided between the upper core body (51) and the lower core body (52).

2. A dome valve for ash removal with easy valve core replacement according to claim 1, Features: The locking assembly (7) comprises a bidirectional threaded rod (71), a fixing block (72), a first threaded sleeve (73), a second threaded sleeve (74), a guide rod (75), a fixing ring (76) and a locking ring (77); the first threaded sleeve (73) and the second threaded sleeve (74) are both connected to the bidirectional threaded rod (71); the first threaded sleeve (73) and the second threaded sleeve (74) are respectively arranged at two ends of the bidirectional threaded rod (71); the guide rod (75) is fixedly connected to the first threaded sleeve (73); the guide rod (75) is arranged along the length direction of the first threaded sleeve (73) and extends toward the second threaded sleeve (74); the guide rod (75) is respectively provided on two opposite sides of the first threaded sleeve (73); the fixing ring (76) is fixedly connected to the second threaded sleeve (74); the fixing ring (77) Two corresponding guide rods (76) are provided on the second threaded sleeve (74), and the guide rod (75) is slidably inserted into the fixing ring (76). The locking ring (77) is provided at the two opposite ends of the first threaded sleeve (73) and the second threaded sleeve (74), respectively. The two locking rings (77) are located in the same plane, and the opposite side walls of the two locking rings (77) are provided with a clamping groove (771). The upper core body (51) is connected with an upper clamping ring (512), and the upper clamping ring (512) is provided on two opposite sides of the inner wall of the upper core body (51). The lower core body (52) is connected with a lower clamping ring (521), and the lower clamping ring (521) is provided on two opposite sides of the inner wall of the lower core body (52). The upper clamping ring (512) and the lower clamping ring (521) can be assembled with each other and clamped into the clamping groove (771).

3. A dome valve for ash removal with easy valve core replacement according to claim 2, Features: The locking ring (77) is arranged in a one-third circular ring shape, and the clamping groove (771) does not penetrate through the two end surfaces of the locking ring (77).

4. A dome valve for ash removal with easy valve core replacement according to claim 2, Features: The cross section of the clamping groove (771) is arranged in the shape of an isosceles trapezoid, and the cross sections of the upper clamping ring (512) and the lower clamping ring (521) are arranged in the shape of a right-angled trapezoid.

5. A dome valve for ash removal with easy valve core replacement according to claim 2, Features: The fixing ring (76) is connected to a linear bearing (761), the linear bearing (761) is located in a ring hole of the fixing ring (76), and the guide rod (75) is inserted into the linear bearing (761).

6. A dome valve for ash removal with easy valve core replacement according to claim 1, Features: The lower core body (52) is provided with a connecting pipe (522), and the connecting pipe (522) is connected to the rotating shaft (4) via bolts.

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