Ball valve with detachable valve seat

Abstract

The utility model discloses a ball valve with a detachable valve seat, and relates to the technical field of valve bodies. The ball valve with the detachable valve seats comprises a valve body and connecting flanges installed at the two ends of the valve body, a spherical valve element is arranged in the valve body, the valve seats are placed in the ends, close to the valve body, of the connecting flanges, and rotary locking mechanisms are installed between the valve body and the connecting flanges. According to the ball valve with the detachable valve seat, fixing screws are screwed out of fixing holes, then connecting strips are pushed downwards, so that two sets of rotating rings are driven to rotate, the rotating rings drive L-shaped opposite pull rods to move out of wedge-shaped locking blocks, meanwhile, T-shaped pull rods move to the positions of circular grooves from the interiors of arc-shaped clamping grooves, and at the moment, connecting flanges are loosened; and then the connecting flange is pulled towards the end away from the valve body to be separated, at the moment, the valve seat can be directly taken out from the interior of the assembling groove, and the valve seat can be conveniently and rapidly disassembled and assembled.

Description

Technical Field

[0001] The utility model relates to the technical field of valve bodies, in particular to a ball valve with a detachable valve seat. Background Art

[0002] A ball valve is a valve body with a spherical valve core. A connecting hole is opened on the spherical valve core, and the valve stem is used to drive the spherical valve core to rotate. When the two ends of the connecting hole correspond to the connecting flanges at both ends of the valve body, the passage is completed. In order to ensure the stable rotation of the spherical valve core and improve the sealing performance, valve seats are usually set at both ends of the valve body.

[0003] At present, the valve seats inside most ball valves are fixedly assembled and cannot be disassembled from the valve body. For some detachable ball valves, the connecting flanges at both ends need to be sealed and connected to the valve body with seals. The connection process requires the installation of multiple sets of bolts to ensure that no leakage occurs during use. The installation method of multiple sets of bolts also increases the difficulty and steps of disassembling the valve seat. Therefore, a ball valve with a detachable valve seat is specially provided to solve the above problems. Utility Model Content

[0004] In view of the shortcomings of the prior art, the utility model provides a ball valve with a detachable valve seat, which solves the problem that the existing detachable ball valves need to seal the connecting flanges at both ends with the valve body using seals, and the connection process requires the installation of multiple sets of bolts to ensure that no leakage occurs during use. The installation method of multiple sets of bolts also increases the difficulty and steps of disassembling the valve seat.

[0005] To achieve the above objectives, the utility model is implemented through the following technical solutions: a ball valve with a detachable valve seat, comprising a valve body and connecting flanges installed at both ends of the valve body, a spherical valve core is arranged inside the valve body, a valve seat is placed inside one end of the connecting flange close to the valve body, and a rotary locking mechanism is installed between the valve body and the connecting flange;

[0006] The rotary locking mechanism comprises a rotary ring, an L-shaped tie rod, a T-shaped tie rod and a wedge-shaped locking block, wherein the rotary ring is rotatably connected to the outer surfaces of both ends of the valve body, the L-shaped tie rod and the T-shaped tie rod are respectively fixedly welded to the two sides of the rotary ring, the wedge-shaped locking block is fixedly welded to the outer wall of the valve body, and the L-shaped tie rod and the wedge-shaped locking block are movably plugged;

[0007] The valve body and the connecting flange are both provided with arc-shaped slots on one side opposite to the other, and the T-shaped pull rod is movably connected in the arc-shaped slots.

[0008] Preferably, a valve stem is fixedly mounted on the top of the spherical valve core, and the valve stem is rotatably connected to the valve body.

[0009] Preferably, a circular groove is formed at the end of the arc-shaped slot, and the inner diameter of the circular groove is the same as the outer diameter of the end of the T-shaped pull rod.

[0010] Preferably, a connecting strip is fixedly connected between the two groups of rotating rings, a fixing screw is threadedly connected to the middle of the connecting strip, a fixing hole is opened on the outer wall of the valve body, and the end of the fixing screw is movably inserted in the fixing hole.

[0011] Preferably, a positioning shaft is fixedly welded to the inner side of the connecting flange, and the positioning shaft is movably inserted in the side wall of the valve body.

[0012] Preferably, a mounting groove is provided inside the connecting flange, and the valve seat is movably inserted in the mounting groove.

[0013] The utility model discloses a ball valve with a detachable valve seat, which has the following beneficial effects: by unscrewing the fixing screw from the inside of the fixing hole and then pushing the connecting strip downward, the two sets of rotating rings are driven to rotate, and the rotating ring drives the L-shaped tie rod to move out from the inside of the wedge-shaped locking block, and at the same time the T-shaped tie rod is moved from the inside of the arc-shaped slot to the circular slot position, at this time the connecting flange is loosened, and then the connecting flange is pulled away from one end of the valve body to disengage, and at this time the valve seat can be directly taken out from the inside of the assembly slot, so that the valve seat can be quickly and conveniently disassembled and assembled. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0015] Figure 1 This is a schematic diagram of the overall outer surface structure of the utility model;

[0016] Figure 2 It is an exploded view of the overall internal structure of the utility model;

[0017] Figure 3 This is a schematic diagram of the outer surface structure of the connecting flange of the utility model;

[0018] Figure 4 It is a schematic diagram of the outer surface structure of the valve body of the utility model.

[0019] In the figure: 1. valve body; 2. connecting flange; 21. arc-shaped slot; 22. positioning shaft; 23. assembly slot; 24. circular slot; 3. valve stem; 4. spherical valve core; 5. valve seat; 6. rotary locking mechanism; 61. rotating ring; 62. L-shaped tie rod; 63. T-shaped tie rod; 64. wedge-shaped locking block; 65. connecting strip; 66. fixing screw; 67. fixing hole. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the embodiments of the utility model clearer, the technical solution in the embodiments of the utility model is described clearly and completely. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] The embodiment of the present application solves the problem that the existing detachable ball valve needs to use seals to seal the connecting flanges at both ends and the valve body, and multiple sets of bolts need to be installed during the connection process to ensure that no leakage occurs during use. The installation method of multiple sets of bolts also increases the difficulty and steps of disassembling the valve seat.

[0022] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0023] The utility model embodiment discloses a ball valve with a detachable valve seat.

[0024] According to the attached Figure 1-4 As shown, it comprises a valve body 1 and connecting flanges 2 installed at both ends of the valve body 1, a spherical valve core 4 is arranged inside the valve body 1, a valve seat 5 is placed inside one end of the connecting flange 2 close to the valve body 1, and a rotary locking mechanism 6 is installed between the valve body 1 and the connecting flange 2;

[0025] The rotary locking mechanism 6 comprises a rotary ring 61, an L-shaped tie rod 62, a T-shaped tie rod 63 and a wedge-shaped locking block 64. The rotary ring 61 is rotatably connected to the outer surfaces of both ends of the valve body 1. The L-shaped tie rod 62 and the T-shaped tie rod 63 are respectively fixedly welded on both sides of the rotary ring 61. The wedge-shaped locking block 64 is fixedly welded on the outer wall of the valve body 1. The L-shaped tie rod 62 and the wedge-shaped locking block 64 are movably plugged.

[0026] A valve stem 3 is fixedly mounted on the top of the spherical valve core 4 , and the valve stem 3 is rotatably connected to the valve body 1 .

[0027] An arc-shaped groove 21 is provided on the opposite side of the valve body 1 and the connecting flange 2, and a T-shaped pull rod 63 is movably connected in the arc-shaped groove 21. A circular groove 24 is provided at the end of the arc-shaped groove 21, and the inner diameter of the circular groove 24 is the same as the outer diameter of the end of the T-shaped pull rod 63. A connecting strip 65 is fixedly connected between the two groups of rotating rings 61, and a fixing screw 66 is threadedly connected to the middle part of the connecting strip 65. A fixing hole 67 is provided on the outer wall of the valve body 1, and the end of the fixing screw 66 is movably inserted in the fixing hole 67.

[0028] Unscrew the fixing screw 66 from the fixing hole 67, and then push the connecting strip 65 downward, thereby driving the two sets of rotating rings 61 to rotate. The rotating rings 61 drive the L-shaped tie rod 62 to move out from the wedge-shaped locking block 64, and at the same time, the T-shaped tie rod 63 moves from the arc-shaped slot 21 to the circular slot 24. At this time, the connecting flange 2 is loosened, and then the connecting flange 2 can be pulled away from the valve body 1 to disengage. At this time, the valve seat 5 can be directly taken out from the assembly slot 23, which is convenient and quick to disassemble and assemble the valve seat 5.

[0029] More specifically, a positioning shaft 22 is fixedly welded to the inner side of the connecting flange 2, and the positioning shaft 22 is movably inserted into the side wall of the valve body 1, so that the connecting flange 2 cannot rotate after being assembled with the valve body 1, thereby achieving effective fixation.

[0030] An assembly groove 23 is provided inside the connecting flange 2 , and the valve seat 5 is movably inserted into the assembly groove 23 , so that the valve seat 5 can be easily assembled and disassembled.

[0031] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A ball valve with a detachable valve seat, comprising a valve body (1) and connecting flanges (2) mounted at both ends of the valve body (1), wherein a spherical valve core (4) is arranged inside the valve body (1), and a valve seat (5) is arranged inside one end of the connecting flange (2) close to the valve body (1), characterized in that: A rotary locking mechanism (6) is installed between the valve body (1) and the connecting flange (2); The rotary locking mechanism (6) comprises a rotary ring (61), an L-shaped tie rod (62), a T-shaped tie rod (63) and a wedge-shaped locking block (64); the rotary ring (61) is rotatably connected to the outer surfaces of both ends of the valve body (1); the L-shaped tie rod (62) and the T-shaped tie rod (63) are respectively fixedly welded to the two sides of the rotary ring (61); the wedge-shaped locking block (64) is fixedly welded to the outer wall of the valve body (1); and the L-shaped tie rod (62) and the wedge-shaped locking block (64) are movably plugged; The valve body (1) and the connecting flange (2) are both provided with arc-shaped slots (21) on opposite sides thereof, and the T-shaped pull rod (63) is movably engaged in the arc-shaped slots (21).

2. A ball valve with a detachable valve seat according to claim 1, characterized in that: A valve stem (3) is fixedly mounted on the top of the spherical valve core (4), and the valve stem (3) is rotatably connected to the valve body (1).

3. The ball valve with a detachable valve seat according to claim 1, characterized in that: A circular groove (24) is formed at the end of the arc-shaped clamping groove (21), and the inner diameter of the circular groove (24) is the same as the outer diameter of the end of the T-shaped pull rod (63).

4. The ball valve with a detachable valve seat according to claim 1, characterized in that: A connecting strip (65) is fixedly connected between the two groups of rotating rings (61), a fixing screw (66) is threadedly connected to the middle of the connecting strip (65), a fixing hole (67) is opened on the outer wall of the valve body (1), and the end of the fixing screw (66) is movably inserted into the fixing hole (67).

5. The ball valve with a detachable valve seat according to claim 1, characterized in that: A positioning shaft (22) is fixedly welded to the inner side of the connecting flange (2), and the positioning shaft (22) is movably inserted into the side wall of the valve body (1).

6. A ball valve with a detachable valve seat according to claim 5, characterized in that: An assembly groove (23) is provided inside the connecting flange (2), and the valve seat (5) is movably inserted into the assembly groove (23).

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