Double-eccentric butterfly valve

Abstract

The utility model relates to the technical field of butterfly valves, in particular to a double-eccentric butterfly valve which comprises a shell and a rotating shaft, the rotating shaft is installed inside the shell, a valve plate is installed on the surface of the rotating shaft, the valve plate is located inside the shell, a locking assembly is arranged on the surface of the valve plate, and the locking assembly comprises a positioning frame. The positioning frame is fixedly connected with the surface of the valve plate, the inner wall of the positioning frame is slidably connected with a connecting plate, the side surface of the connecting plate is fixedly connected with a plug pin, the inner wall of the positioning frame is rotatably connected with a bidirectional lead screw, the connecting plate is in threaded connection with the surface of the bidirectional lead screw, and a connecting frame is installed on the surface of the positioning frame. According to the butterfly valve, the locking assembly is arranged, the assembling efficiency between the rotating shaft and the valve plate can be improved while the structural strength of the connecting portion of the rotating shaft and the valve plate is guaranteed, then the problem that the installation efficiency is low due to the fact that a locking structure is complex is solved, and the convenience of butterfly valve installation is further improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to butterfly valve technical field especially relates to a double eccentric butterfly valve. BACKGROUND

[0002] The double eccentric butterfly valve is a kind of valve device with excellent performance, it has unique design structure, two eccentric shafts make the valve more smooth and efficient in the process of opening and closing, the valve is well sealed, can effectively prevent medium leakage, double eccentric butterfly valve has the advantages such as small operating torque, quick switching, small fluid resistance.

[0003] Prior art such as the utility model with publication number CN218992381U, this patent discloses a double eccentric butterfly valve, the patent adopts valve body, upper valve rod, lower valve rod, valve plate, upper pressure sleeve, lower pressure sleeve, upper shaft sleeve and lower shaft sleeve, the valve plate is movably installed in the valve body by upper valve rod, lower valve rod, the upper valve rod is rotatably installed on the upper side of valve body by upper pressure sleeve, upper shaft sleeve, the lower valve rod is rotatably installed on the lower side of valve body by lower pressure sleeve, lower shaft sleeve, compared with prior art, the utility model has the following beneficial effects: by adding rib bar one, rib bar two on upper valve rod, lower valve rod, avoid opening through hole on upper valve rod, lower valve rod, greatly improve the use intensity of upper valve rod, lower valve rod, the setting of clamp piece one, clamp piece two, it is convenient to fix upper valve rod, lower valve rod on valve plate by rib bar one, rib bar two, without using pin through mode to fix upper valve rod, lower valve rod, while guaranteeing the fixing intensity of upper valve rod, lower valve rod, also can improve the use intensity of upper valve rod, lower valve rod, solve the problem that the valve is fixed by pin through upper valve rod, lower valve rod, upper end of lower valve rod, lower end of upper valve rod is fixed on valve plate, such design can reduce the use intensity of upper valve rod, lower valve rod, when upper valve rod, lower valve rod is subjected to greater torsion and resistance, it is very easy to break, reduce the service life of upper valve rod, lower valve rod.

[0004] In the process of installing valve shaft, there is prior art such as the butterfly valve described above to increase the strength of valve rod part, lock valve rod by using screw and clamping piece structure, to ensure the stability of locking structure, the clamping piece is fixed by multiple screws, when assembling, because the number of screws is more, the assembly operation of staff becomes complex, in turn, cause the operation efficiency to reduce, interfere with the assembly speed of equipment. UTILITY MODEL CONTENTS

[0005] The utility model aims at solving the shortcomings that the clamping piece is fixed by multiple screws in prior art, the assembly operation of staff becomes complex when assembling because the number of screws is more, in turn, cause the operation efficiency to reduce, interfere with the assembly speed of equipment, and puts forward a double eccentric butterfly valve.

[0006] In order to achieve the above object, the utility model discloses the following technical scheme: a double eccentric butterfly valve, including shell and pivot, the pivot is installed in the inside of shell, the surface of pivot is installed with valve plate, the valve plate is located in the inside of shell, the surface of valve plate is provided with locking assembly, the locking assembly includes locating frame, the surface of locating frame is fixedly connected with valve plate, the inner wall of locating frame is slidably connected with link plate, the side surface of link plate is fixedly connected with bolt, the inner wall of locating frame is rotatably connected with two -way screw rod, two -way screw rod and the inner wall of locating frame are interference fit, the surface of link plate is threadedly connected with two -way screw rod, the surface of locating frame is installed with connecting frame, the inner wall of connecting frame is inserted with bolt, the side surface of connecting frame is fixedly connected with limiting rod, the side fixedly connected with the locating sleeve of valve plate away from locating frame, the inner wall of pivot is inserted with locating sleeve.

[0007] Preferably, both ends of the two-way screw rod are fixedly connected with knobs, the knobs are in contact with the side surface of the locating frame, the link plates on both sides can be moved synchronously through the two-way screw rod, so that the link plates on both sides move towards each other.

[0008] Preferably, the number of link plates is two, the two link plates are symmetrically arranged about the two-way screw rod, the bolt penetrates through the side surface of the locating frame, the bolt can be pushed in the moving process through the link plate, so that the bolt is inserted into the connecting frame to lock the connecting frame.

[0009] Preferably, the surface of the pivot is provided with a circular hole, the limiting rod is inserted with the inner wall of the circular hole, the limiting rod penetrates through the side surface of the valve plate, the position of the pivot can be locked on the surface of the valve plate through the limiting rod in the locked state.

[0010] Preferably, a sealing assembly is arranged at the joint of the shell and the pivot, the sealing assembly comprises a pressing plate, the pressing plate is installed on the surface of the shell, the side of the pressing plate close to the shell is fixedly connected with a sleeve ring, the side of the sleeve ring away from the pressing plate is fixedly connected with a fixed ring, the surface of the fixed ring is installed with a sealing ring one, the lower surface of the sealing ring one is fixedly connected with a sealing ring two, the arc surface of the pivot is provided with a groove, the sealing ring two is inserted with the inner wall of the groove, the sealing ring one and the sealing ring two can be extruded downward in the locked state through the cooperation of the pressing plate and the sleeve ring.

[0011] Preferably, the surface of the pressing plate is provided with a circular hole, the fixed bolt is inserted with the inner wall of the circular hole, the surface of the shell is provided with a threaded groove, the fixed bolt is threadedly connected with the inner wall of the threaded groove, the position of the pressing plate can be locked on the surface of the shell through the fixed bolt, so as to ensure that the pressing plate is always in the pressing state.

[0012] Preferably, the pressing plate is sleeved with the surface of the rotating shaft, the sleeve ring is sleeved with the surface of the rotating shaft, the sleeve ring is inserted with the inner wall of the shell, the sealing ring one is sleeved with the surface of the rotating shaft, the sealing ring one is located on the inner wall of the shell, the sealing ring two is contacted with the inner wall of the shell, and the sealing ring one, the sealing ring two and the groove are matched, so that the connecting part of the shell and the rotating shaft is sealed.

[0013] Compared with the prior art, the utility model has the advantages and positive effects that:

[0014] 1、the utility model discloses a locking assembly is set up, when installing rotating shaft, rotating shaft is inserted into the hole of shell, when the surface round hole of rotating shaft inserts the positioning sleeve, and the hole of positioning sleeve surface coincides, push -connected frame, and the limit rod of connected frame is pushed and inserts the round hole and positioning sleeve, with the preliminary locking of positioning sleeve to rotating shaft position, when the surface of connected frame and valve plate is contacted, anticlockwise rotation knob, and the two -way screw rod of knob rotation is engaged with the link plate, and the link plate is pushed and inserts the bolt in the connected frame under the action of two -way screw rod, and the position of connected frame is locked, and the assembly operation between rotating shaft and valve plate is completed immediately, through set up locking assembly, when ensuring the connecting part structure intensity of rotating shaft and valve plate, can improve the assembly efficiency between rotating shaft and valve plate, thereby reduce the problem that locking structure is more complex, leads to the low problem of installation efficiency, and further improve the convenience of butterfly valve installation.

[0015] 2、the utility model discloses a sealing assembly is set up, and the assembly of rotating shaft and valve plate is completed, when the connecting part of rotating shaft and shell needs to be sealed, the center of sealing ring two is aligned with rotating shaft, and push -connected frame, and the sealing ring one and sealing ring two are pushed down by pressing plate and sleeve ring, and the sealing ring one and sealing ring two are inserted into the inside of shell in the process of moving, when the inner wall of sealing ring two and shell is contacted, continue to press down the pressing plate, and the sealing ring one and sleeve ring of pressing plate and sleeve ring extrude sealing ring two, and sealing ring two is extruded and deformed, and is inserted into the recess, when the surface of pressing plate and shell is contacted, the pressing plate can be locked by fixed bolt, and the sealing operation of the connecting part of rotating shaft and shell is completed immediately, through set up sealing assembly, the rotating shaft and shell can be sealed through multiple components, and the sealing member can be buckled into the rotating shaft slot, so that the sealing effect of the connecting part is improved. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 A three-dimensional structure schematic diagram of the double eccentric butterfly valve is provided for the utility model;

[0017] Figure 2 A rear view structure schematic diagram of the double eccentric butterfly valve is provided for the utility model;

[0018] Figure 3The utility model provides a locking assembly structure schematic drawing of double eccentric butterfly valve,

[0019] Figure 4 The utility model provides a sealing assembly structure schematic drawing of double eccentric butterfly valve,

[0020] Figure 5 The utility model provides a sealing assembly sectional structure schematic drawing of double eccentric butterfly valve.

[0021] Legend:

[0022] 1, shell, 2, rotating shaft, 3, valve plate, 4, locking assembly, 41, positioning frame, 42, link plate, 43, bolt, 44, two-way screw rod, 45, knob, 46, connecting frame, 47, limiting rod, 48, positioning sleeve, 5, sealing assembly, 51, pressing plate, 52, collar, 53, fixed ring, 54, sealing ring one, 55, sealing ring two, 56, recess, 57, fixed bolt. Specific implementation

[0023] Please refer to Figures 1-5 The utility model provides a technical scheme: a double eccentric butterfly valve, including shell 1 and rotating shaft 2, rotating shaft 2 installs in the inside of shell 1, the surface of rotating shaft 2 is installed with valve plate 3, and valve plate 3 is located in the inside of shell 1, and the surface of valve plate 3 is provided with locking assembly 4, and the junction of shell 1 and rotating shaft 2 is provided with sealing assembly 5.

[0024] The specific setting and function of locking assembly 4 and sealing assembly 5 are described below.

[0025] In the embodiment: locking assembly 4 includes positioning frame 41, and positioning frame 41 is fixedly connected with the surface of valve plate 3, the inner wall of positioning frame 41 is slidably connected with link plate 42, the side surface of link plate 42 is fixedly connected with bolt 43, the inner wall of positioning frame 41 is rotatably connected with two-way screw rod 44, and two-way screw rod 44 is in interference fit with the inner wall of positioning frame 41, the surface of link plate 42 is threadedly connected with two-way screw rod 44, connecting frame 46 is installed on the surface of positioning frame 41, bolt 43 is inserted with the inner wall of connecting frame 46, the side surface of connecting frame 46 is fixedly connected with limiting rod 47, positioning sleeve 48 is fixedly connected with the side of valve plate 3 away from positioning frame 41, and rotating shaft 2 is inserted with the inner wall of positioning sleeve 48.

[0026] Specifically, both ends of two-way screw rod 44 are fixedly connected with knob 45, knob 45 is in contact with the side surface of positioning frame 41, and the two sides of link plate 42 can be moved synchronously through two-way screw rod 44, so that the two sides of link plate 42 move towards each other.

[0027] Specifically, the number of the adapter plates 42 is two, and the two adapter plates 42 are symmetrically arranged about the bidirectional screw rod 44, and the bolt 43 penetrates the side surface of the positioning frame 41.

[0028] In the embodiment, the bolt 43 can be pushed by the adapter plate 42 during movement, so that the bolt 43 is inserted into the connecting frame 46 to lock the connecting frame 46.

[0029] Specifically, the surface of the rotating shaft 2 is provided with a circular hole, the limiting rod 47 is inserted with the inner wall of the circular hole, the limiting rod 47 penetrates the side surface of the valve plate 3, and the position of the rotating shaft 2 is locked on the surface of the valve plate 3 by the limiting rod 47 in the locking state.

[0030] In the embodiment, the sealing assembly 5 includes a pressing plate 51 installed on the surface of the shell 1, a sleeve ring 52 fixedly connected to the side of the pressing plate 51 close to the shell 1, a fixed ring 53 fixedly connected to the side of the sleeve ring 52 away from the pressing plate 51, a sealing ring one 54 installed on the surface of the fixed ring 53, a sealing ring two 55 fixedly connected to the lower surface of the sealing ring one 54, and a groove 56 provided on the arc surface of the rotating shaft 2, and the sealing ring two 55 is inserted with the inner wall of the groove 56.

[0031] In the embodiment, the sealing ring one 54 and the sealing ring two 55 can be pressed downward in the locking state by the cooperation of the pressing plate 51 and the sleeve ring 52.

[0032] Specifically, the surface of the pressing plate 51 is provided with a circular hole, the fixed bolt 57 is inserted into the inner wall of the circular hole, the surface of the shell 1 is provided with a threaded groove, and the fixed bolt 57 is threadedly connected with the inner wall of the threaded groove. The position of the pressing plate 51 can be locked on the surface of the shell 1 by the fixed bolt 57, so as to ensure that the pressing plate 51 is always in a pressing state.

[0033] Specifically, the pressing plate 51 is sleeved with the surface of the rotating shaft 2, the sleeve ring 52 is sleeved with the surface of the rotating shaft 2, the sleeve ring 52 is inserted with the inner wall of the shell 1, the sealing ring one 54 is sleeved with the surface of the rotating shaft 2, the sealing ring one 54 is located in the inner wall of the shell 1, and the sealing ring two 55 is in contact with the inner wall of the shell 1.

[0034] In the embodiment, the connection part of the shell 1 and the rotating shaft 2 can be sealed by the cooperation of the sealing ring one 54, the sealing ring two 55 and the groove 56.

[0035] Working principle: when installing the rotating shaft 2, insert the rotating shaft 2 into the hole of the shell 1, when the rotating shaft 2 is inserted into the positioning sleeve 48 and the surface hole coincides with the hole of the positioning sleeve 48, push the connecting frame 46, the connecting frame 46 pushes the limiting rod 47, the limiting rod 47 is inserted into the hole and the positioning sleeve 48 to cooperate with the positioning sleeve 48 to preliminarily lock the position of the rotating shaft 2, when the connecting frame 46 contacts with the surface of the valve plate 3, rotate the knob 45 clockwise, the knob 45 rotates the bidirectional screw rod 44, the bidirectional screw rod 44 engages with the connecting plate 42, the connecting plate 42 pushes the latch 43 to the direction of the knob 45 under the action of the bidirectional screw rod 44, the latch 43 is inserted into the connecting frame 46, so as to lock the position of the connecting frame 46, and then the assembly operation between the rotating shaft 2 and the valve plate 3 is completed, by setting the locking assembly 4, the assembly efficiency between the rotating shaft 2 and the valve plate 3 can be improved while ensuring the structural strength of the connecting part of the rotating shaft 2 and the valve plate 3, thereby reducing the problem that the locking structure is relatively complex, resulting in low installation efficiency, and further improving the convenience of butterfly valve installation;

[0036] In addition, after completing the assembly of the rotating shaft 2 and the valve plate 3, the connecting part of the rotating shaft 2 and the shell 1 needs to be sealed, the center of the sealing ring two 55 is aligned with the rotating shaft 2, the pressing plate 51 is pushed, the pressing plate 51 cooperates with the sleeve ring 52 to push the sealing ring one 54 and the sealing ring two 55 downward, the sealing ring one 54 and the sealing ring two 55 are inserted into the inside of the shell 1 in the moving process, when the sealing ring two 55 contacts with the inner wall of the shell 1, continue to press the pressing plate 51 downward, the pressing plate 51 cooperates with the sleeve ring 52 and the sealing ring one 54 to extrude the sealing ring two 55, the sealing ring two 55 is extruded and deformed, and is inserted into the groove 56, when the pressing plate 51 contacts with the surface of the shell 1, the pressing plate 51 is locked by the fixing bolt 57, and the sealing operation of the connecting part of the rotating shaft 2 and the shell 1 is completed, by setting the sealing assembly 5, the rotating shaft 2 and the shell 1 can be sealed by multiple components, and the sealing element can be buckled into the slot of the rotating shaft 2, so as to improve the sealing effect of the connecting part.

Claims

1. A double eccentric butterfly valve comprising a housing (1) and a rotating shaft (2), characterized in that: The rotating shaft (2) is installed inside the shell (1), the surface of the rotating shaft (2) is provided with a valve plate (3), the valve plate (3) is located inside the shell (1), the surface of the valve plate (3) is provided with a locking assembly (4), the locking assembly (4) comprises a positioning frame (41), the positioning frame (41) is fixedly connected with the surface of the valve plate (3), the inner wall of the positioning frame (41) is slidably connected with an adapter plate (42), the side surface of the adapter plate (42) is fixedly connected with a latch (43), the inner wall of the positioning frame (41) is rotatably connected with a bidirectional screw rod (44), the adapter plate (42) is threadedly connected with the surface of the bidirectional screw rod (44), the surface of the positioning frame (41) is provided with a connecting frame (46), the latch (43) is inserted with the inner wall of the connecting frame (46), the side surface of the connecting frame (46) is fixedly connected with a limiting rod (47), the side, away from the positioning frame (41), of the valve plate (3) is fixedly connected with a positioning sleeve (48), and the rotating shaft (2) is inserted with the inner wall of the positioning sleeve (48).

2. A double eccentric butterfly valve according to claim 1, characterized in that: Both ends of the bidirectional screw rod (44) are fixedly connected with knobs (45), and the knobs (45) are in contact with the side surface of the positioning frame (41).

3. A double eccentric butterfly valve according to claim 1, characterized in that: The number of the adapter plates (42) is two, and the two adapter plates (42) are symmetrically arranged about the bidirectional screw rod (44), and the latch (43) penetrates through the side surface of the positioning frame (41).

4. The double eccentric butterfly valve according to claim 1, wherein: The surface of the rotating shaft (2) is provided with a circular hole, the limiting rod (47) is inserted with the inner wall of the circular hole, and the limiting rod (47) penetrates through the side surface of the valve plate (3).

5. A double eccentric butterfly valve according to claim 1, characterized in that: The junction of the shell (1) and the rotating shaft (2) is provided with a sealing assembly (5), the sealing assembly (5) comprises a pressing plate (51), the pressing plate (51) is installed on the surface of the shell (1), the side, close to the shell (1), of the pressing plate (51) is fixedly connected with a sleeve ring (52), the side, away from the pressing plate (51), of the sleeve ring (52) is fixedly connected with a fixed ring (53), the surface of the fixed ring (53) is provided with a sealing ring one (54), the lower surface of the sealing ring one (54) is fixedly connected with a sealing ring two (55), the arc surface of the rotating shaft (2) is provided with a groove (56), and the sealing ring two (55) is inserted with the inner wall of the groove (56).

6. A double eccentric butterfly valve according to claim 5, characterized in that: The surface of the pressing plate (51) is provided with a circular hole, the fixed bolt (57) is inserted into the inner wall of the circular hole, the surface of the shell (1) is provided with a threaded groove, and the fixed bolt (57) is threadedly connected with the inner wall of the threaded groove.

7. A double eccentric butterfly valve according to claim 5, characterized in that: The surface of the pressing plate (51) is sleeved with the rotating shaft (2), the surface of the sleeve ring (52) is sleeved with the rotating shaft (2), the sleeve ring (52) is inserted with the inner wall of the shell (1), the surface of the sealing ring one (54) is sleeved with the rotating shaft (2), the sealing ring one (54) is located in the inner wall of the shell (1), and the sealing ring two (55) is in contact with the inner wall of the shell (1).

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