Safety closed valve

Abstract

The utility model discloses a safety closed valve which comprises a valve body, a first sealing ring, an actuator, an upper shaft sleeve, a lower shaft sleeve, a valve shaft, a first shaft sleeve, a first swing arm, a supporting plate, a valve plate, a connecting plate, a second swing arm, a supporting block and a third swing arm. The actuator is fixedly installed on the top of the valve body, and the valve shaft is installed in the upper shaft sleeve and the lower shaft sleeve in a rotating and sealing mode. The valve plate is not in frictional contact with the valve body and other files in the opening and closing process, so that the valve plate cannot be abraded, the use reliability of the safe closed valve is improved, the service life of the safe closed valve is prolonged, the supporting plate is connected with the valve body through the supporting block, and the safe closed valve has the advantage of being convenient to position, weld and assemble; and the sealing performance between the valve plates is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to valve technical field, especially is involved in a kind of safety sealed valve. BACKGROUND

[0002] Valve is used to open and close pipeline, controls flow direction, adjusts and controls the parameter (temperature, pressure and flow) of conveying medium. According to its function, it can be divided into shut-off valve, check valve, regulating valve, etc. For shut-off valve, ball valve and butterfly valve are currently used. The valve core of ball valve and butterfly valve is prone to wear under the use environment of frequent opening and closing, which can cause sealing problem of valve when shutting down, and frequent maintenance and replacement of valve are required. SUMMARY

[0003] The technical problem to be solved by the utility model is to provide a safety sealed valve with valve plate pressing on one side opening sealing ring, which can avoid wear of valve plate in frequent opening and closing.

[0004] In order to solve the above technical problem, the utility model is realized by the following technical scheme: a kind of safety sealed valve, including valve main body, first sealing ring, actuator, upper shaft sleeve, lower shaft sleeve, valve shaft, first shaft sleeve, first swing arm, support plate, valve plate, connecting plate, second swing arm, support block and third swing arm, the upper shaft sleeve, lower shaft sleeve are fixedly installed on the upper and lower ends of valve main body, the actuator is fixedly installed on the top of valve main body, the valve shaft is rotatably and sealingly installed in the upper shaft sleeve and lower shaft sleeve, the actuator rod is in transmission connection with the top of valve shaft, the support block is fixedly installed on the inner wall of valve main body, the support block is provided with clamping groove at the front end, the connecting plate is slidingly installed in the clamping groove at the front end of support block, the support plate is further provided with stop block, the support plate, stop block and support block are welded and fixed, the valve shaft is rotatably installed at the front end of support plate, two first shaft sleeves are fixedly sleeved and installed on the valve shaft, and the two first shaft sleeves are located on the upper and lower sides of support plate, the first swing arm is fixedly arranged on the first shaft sleeve, the second swing arm is fixedly arranged on the connecting plate, the second swing arm is hingedly connected with the front end of first swing arm at the middle, the third swing arm is hingedly installed on the support plate at the rear end, the front end of second swing arm is hingedly connected with the front end of third swing arm, the connecting plate is provided with second annular clamping groove, the second sealing ring is embedded and installed in the second annular clamping groove, the connecting plate is provided with first through hole in annular array, the valve plate is provided with second through hole matched with first through hole, the connecting plate and valve plate are fixedly connected through first through hole, second through hole and tension bolt, the second sealing ring is pressed on the valve plate, the first annular clamping groove is arranged on the valve main body, the first sealing ring is embedded and fixedly installed in the first annular clamping groove, and the valve plate can be pressed on the first sealing ring to close the valve main body.

[0005] As preferred, the connecting plate is further provided with a third annular clamping groove, and a third sealing ring is embedded and installed in the third annular clamping groove, and the third sealing ring is crimped on the valve plate.

[0006] As preferred, a limiting bolt for pressing and fixing the support plate is screwed and installed on the support block.

[0007] As preferred, the edge of the valve plate is provided as a flat structure, and the middle part of the valve plate is provided as an outwardly convex structure.

[0008] Compared with the prior art, the valve plate does not rub against the valve body and other files during the opening and closing process, so the valve plate will not be worn, and the use reliability and service life of the safety sealed valve are improved, the support plate is connected with the valve body through the support block, has the advantage of being convenient for positioning and welding, two sealing rings are arranged on the valve plate, and the sealing property between the valve plates is improved. BRIEF DESCRIPTION OF DRAWINGS

[0009] The utility model is further described below in combination with the drawings.

[0010] Figure 1 It is the perspective view of the utility model.

[0011] Figure 2 It is the front view of the utility model.

[0012] Figure 3 It is the structural schematic view of the connecting plate.

[0013] Figure 4 It is the structural schematic view of the connecting plate. Figure 2 It is the enlarged structural schematic view of M of the utility model. DETAILED DESCRIPTION

[0014] The utility model is described in detail below in combination with the specific implementation mode:

[0015] As preferred, the edge of the valve plate is provided as a flat structure, and the middle part of the valve plate is provided as an outwardly convex structure. Figures 1 to 4The safety valve shown includes a valve body 1, a first sealing ring 11, an actuator 2, an upper shaft sleeve 31, a lower shaft sleeve 32, a valve shaft 4, a first shaft sleeve 5, a first swing arm 51, a support plate 6, a valve plate 7, a connecting plate 8, a second swing arm 81, a support block 9, and a third swing arm 10. The upper shaft sleeve 31 and the lower shaft sleeve 32 are fixedly and sealingly installed on the upper and lower ends of the valve body 1. The actuator 2 is fixedly installed on the top of the valve body 1. The valve shaft 4 is rotatably and sealingly installed in the upper shaft sleeve 31 and the lower shaft sleeve 32. The actuator 2 is in transmission connection with the top of the valve shaft 4. The support block 9 is fixedly installed on the inner wall of the valve body 1. The support block 9 is provided with a clamping groove at the front end. The connecting plate 8 is slidingly installed in the clamping groove at the front end of the support block 9. The support plate 6 is further provided with a stop block 61. The stop block 61 is used for welding and positioning the support plate 6. The support plate 6 and the stop block 61 are welded and fixed to the support block 9, thereby increasing the firmness of the support plate 6 after welding and fixing. The valve shaft 4 is rotatably installed at the front end of the support plate 6. Two first shaft sleeves 5 are fixedly sleeved on the valve shaft 4. The two first shaft sleeves 5 are located on the upper and lower sides of the support plate 6. The first swing arm 51 is fixedly arranged on the first shaft sleeve 5. The second swing arm 81 is fixedly arranged on the connecting plate 8. The second swing arm 81 is hingedly connected to the front end of the first swing arm 51. The third swing arm 10 is hingedly installed on the support plate 6 at the rear end. The front end of the second swing arm 81 is hingedly connected to the front end of the third swing arm 10. The connecting plate 8 is provided with a second annular clamping groove 83. A second sealing ring is embedded and installed in the second annular clamping groove 83. The connecting plate 8 is provided with a first through hole 82 arranged in an annular array. The valve plate 7 is provided with a second through hole matched with the first through hole 82. The connecting plate 8 and the valve plate 7 are fixedly connected through the matched first through hole 82 and second through hole and a tension bolt. A fourth sealing ring is sleeved on the tension bolt, thereby increasing the sealing property between the tension bolt, its lock nut, and the connecting plate 8 and the valve plate 7. The second sealing ring is press-fitted on the valve plate 7. The valve body 1 is provided with a first annular clamping groove. The first sealing ring 11 is embedded and fixedly installed in the first annular clamping groove. The valve plate 7 can be press-fitted on the first sealing ring 11 to close the valve body 1.

[0016] The connecting plate 8 is further provided with a third annular clamping groove 84. A third sealing ring is embedded and installed in the third annular clamping groove 84. The third sealing ring is press-fitted on the valve plate 7, thereby increasing the sealing property of the connecting plate 8 and the valve plate 7 after fixed connection. In the case that one of the second sealing ring and the third sealing ring is damaged, the other one can still play a sealing role.

[0017] The support block 9 is provided with a limiting bolt 91 for press-fitting and fixing the support plate 6. The limiting bolt 91 is tightened to press and fix the support plate 6, thereby facilitating the welding effect.

[0018] The edge of the valve plate 7 is provided as a flat structure capable of being pressed and sealed with the first sealing ring 11, and the middle part of the valve plate 7 is provided as an outwardly protruding structure capable of leaving installation space for the first swing arm 51, the second swing arm 81 and the third swing arm 10.

[0019] The actuator 2 drives the valve shaft 4 to rotate, and the valve shaft 4 drives the first swing arm 51, the second swing arm 81 and the third swing arm 10 to move, so as to realize the opening and closing of the valve plate 7. When the valve plate 7 is pressed against the first sealing ring 11, the valve body 1 is in a closed state; when the valve plate 7 is not pressed against the first sealing ring 11, the valve body 1 is in an open state.

Claims

1. A safety sealing valve, characterized in that: The valve body includes a valve body (1), a first sealing ring (11), an actuator (2), an upper bushing (31), a lower bushing (32), a valve shaft (4), a first bushing (5), a first swing arm (51), a support plate (6), a valve plate (7), a connecting plate (8), a second swing arm (81), a support block (9), and a third swing arm (10). The upper bushing (31) and the lower bushing (32) are fixedly and sealed at the upper and lower ends of the valve body (1). The actuator (2) is fixedly installed on the top of the valve body (1). The valve shaft (4) is rotatably and sealed on the upper bushing (31). Inside the lower bushing (32), the actuator rod of the actuator (2) is connected to the top of the valve shaft (4) via a transmission. The support block (9) is fixedly installed on the inner wall of the valve body (1). The front end of the support block (9) is provided with a slot. The rear end of the connecting plate (8) is slidably installed in the slot at the front end of the support block (9). A stop block (61) is also fixedly installed on the support plate (6). The support plate (6), the stop block (61), and the support block (9) are welded and fixed. The valve shaft (4) is rotatably installed at the front end of the support plate (6). Two first bushings (5) are fixedly sleeved and installed on the valve. On the shaft (4), two first bushings (5) are located on the upper and lower sides of the support plate (6). The first swing arm (51) is fixedly mounted on the first bushing (5), and the second swing arm (81) is fixedly mounted on the connecting plate (8). The middle part of the second swing arm (81) is hinged to the front end of the first swing arm (51). The rear end of the third swing arm (10) is hinged to the support plate (6), and the front end of the second swing arm (81) is hinged to the front end of the third swing arm (10). The connecting plate (8) is provided with a second annular groove (83), and the second annular groove (83) is embedded in the second annular groove (83). Two sealing rings are provided. The connecting plate (8) is provided with a first through hole (82) arranged in a ring array. The valve plate (7) is provided with a second through hole that matches the first through hole (82). The connecting plate (8) and the valve plate (7) are fixedly connected by a tightening bolt through the first through hole (82) and the second through hole. The second sealing ring is pressed onto the valve plate (7). The valve body (1) is provided with a first annular groove. The first sealing ring (11) is embedded and fixedly installed in the first annular groove. The valve plate (7) can be pressed onto the first sealing ring (11) to close the valve body (1).

2. The safety sealing valve according to claim 1, characterized in that: The connecting plate (8) is also provided with a third annular groove (84), in which a third sealing ring is embedded and installed, and the third sealing ring is pressed onto the valve plate (7).

3. The safety sealing valve according to claim 1, characterized in that: The support block (9) is screwed with a limiting bolt (91) for pressing and fixing the support plate (6).

4. The safety sealing valve according to claim 1, characterized in that: The valve plate (7) has a planar edge and an outwardly protruding center.

Images