Combined valve cover

Abstract

The utility model relates to the technical field of valve bonnets, and discloses a combined valve bonnet which comprises a valve body and a bonnet body, a first flange is arranged at the top end of the valve body, four mounting plates are fixedly connected to the side face of the valve body, a damping rotating shaft is arranged on each mounting plate, and the damping rotating shafts are arranged on the valve body. A mounting disc is mounted at the upper end of each damping rotating shaft, and a pressing assembly is arranged on each mounting disc; the valve cover and the first flange are both provided with corresponding threaded holes, bolts are installed in the threaded holes, corresponding to the first flange, of the valve cover in a threaded mode, and the bottom end of each bolt is sleeved with a nut in a threaded mode. And meanwhile, the valve cover and the valve body can be further reinforced through the pressing assembly, so that the valve cover and the valve body are connected more tightly and stably.

Description

TECHNICAL FIELD

[0001] The utility model relates to valve bonnet technical field, concretely is a combined valve bonnet. BACKGROUND

[0002] In the valve field, the bonnet is a key component connecting the valve body and the actuator, and its structure design directly affects the sealing performance, installation efficiency and service life of the valve.

[0003] The traditional bonnet relies on a bolt set to achieve rigid connection with the valve body flange. When the internal medium pressure of the valve (such as high-pressure steam, oil, etc.) exceeds the bolt bearing limit, the bolt will be fatigued due to continuous tensile stress, and after long-term operation, problems such as thread slippage and screw rod fracture are prone to occur, and the installation connection between the bonnet and the valve body is not stable enough. SUMMARY

[0004] In view of the deficiencies of the prior art, the utility model provides a combined valve bonnet, which solves the problem that the traditional bonnet relies on a bolt set to achieve rigid connection with the valve body flange, and when the internal medium pressure of the valve (such as high-pressure steam, oil, etc.) exceeds the bolt bearing limit, the bolt will be fatigued due to continuous tensile stress, and after long-term operation, problems such as thread slippage and screw rod fracture are prone to occur, and the installation connection between the bonnet and the valve body is not stable enough.

[0005] The utility model provides the following technical scheme: a combined valve bonnet, comprising a valve body and a bonnet, the top end of the valve body is provided with a first flange, the side surface of the valve body is fixedly connected with four mounting plates, each mounting plate is provided with a damping shaft, the upper end of each damping shaft is provided with a mounting disc, and each mounting disc is provided with a pressing assembly.

[0006] The bonnet and the first flange are provided with corresponding threaded holes, and the threaded holes of the bonnet and the first flange are internally threaded with bolts, and the bottom end of each bolt is threaded with a nut.

[0007] Preferred technical scheme one: the pressing assembly comprises a screw rod rotatably mounted on the upper surface of the mounting disc, the surface of the screw rod is threaded with a sleeve, the side surface of the sleeve is fixedly connected with a connecting plate, and the lower surface of the connecting plate is fixedly connected with a clamping rod.

[0008] Preferred technical scheme two: the upper surface of the bonnet is fixedly connected with four fixed blocks, and the upper surface of each fixed block is provided with a clamping groove matched with the clamping rod.

[0009] Preferred technical scheme three: the upper surface of each mounting disc is fixedly connected with a sliding rod, the surface of each sliding rod is slidingly sleeved with a sliding sleeve, and each sliding sleeve is fixedly connected with the corresponding sleeve.

[0010] Preferably, the valve cover body is made of high-strength metal material, and the inner lining or sealing surface of the valve cover is made of corrosion-resistant alloy or ceramic coating.

[0011] Preferably, the valve body is welded with a second flange at both ends, and a plurality of mounting holes are formed on the surface of the two second flanges, and a flexible expansion joint is arranged at the connection between the valve body and the valve cover.

[0012] Compared with the prior art, the combined valve cover has the following beneficial effects: when installed, the valve cover is installed on the first flange through bolts and is locked and fixed through nuts, then a plurality of installation discs are rotated, a plurality of connecting plates and clamping rods are rotated to the upper side of the valve cover, and the clamping rods are located above the fixing blocks, then the screw rod is rotated to drive the screw sleeve to descend, thereby driving the screw sleeve and the connecting plate to descend, the clamping rod is clamped into the clamping groove of the fixing block, the valve cover is further compressed and fixed, and the installation and connection between the valve cover and the valve body are more tightly and stably. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is a structural schematic view of the utility model;

[0014] Figure 2 It is a structural schematic view of the utility model; Figure 1 It is an enlarged view of the structure of A;

[0015] Figure 3 It is a structural schematic view of the compression assembly and the fixing block of the utility model.

[0016] In the figure: 1, valve body; 2, valve cover; 3, first flange; 4, mounting plate; 5, damping shaft; 6, installation disc; 7, compression assembly; 8, bolt; 9, nut; 10, screw rod; 11, screw sleeve; 12, connecting plate; 13, clamping rod; 14, fixing block; 15, clamping groove; 16, sliding rod; 17, sliding sleeve; 18, second flange. DETAILED DESCRIPTION

[0017] Please refer to Figures 1-3 ,

[0018] Embodiment one: a combined valve cover, comprising a valve body 1 and a valve cover 2, the top end of the valve body 1 is provided with a first flange 3, the side surface of the valve body 1 is fixedly connected with four mounting plates 4, each mounting plate 4 is provided with a damping shaft 5, the upper end of each damping shaft 5 is installed with an installation disc 6, and each installation disc 6 is provided with a compression assembly 7.

[0019] The valve cover 2 and the first flange 3 are provided with corresponding threaded holes, and bolts 8 are screwed in the corresponding threaded holes of the valve cover 2 and the first flange 3.

[0020] In the second embodiment, the pressing assembly 7 comprises a screw rod 10 rotatably installed on the upper surface of the mounting disc 6, the surface of the screw rod 10 is threadedly sleeved with a screw sleeve 11, the side surface of the screw sleeve 11 is fixedly connected with a connecting plate 12, the lower surface of the connecting plate 12 is fixedly connected with a clamping rod 13, and the screw sleeve 11 and the connecting plate 12 and the clamping rod 13 are driven downward by rotating the screw rod 10, so as to facilitate the pressing and fixing of the valve cover 2.

[0021] In the third embodiment, the upper surface of the valve cover 2 is fixedly connected with four fixing blocks 14, the upper surface of each fixing block 14 is provided with a clamping groove 15 matched with the clamping rod 13, and the valve cover 2 is pressed and fixed, so that the reinforcing effect is better.

[0022] In the fourth embodiment, the upper surface of each mounting disc 6 is fixedly connected with a sliding rod 16, the surface of each sliding rod 16 is slidingly sleeved with a sliding sleeve 17, and each sliding sleeve 17 is fixedly connected with the corresponding screw sleeve 11, so that the movement of the screw sleeve 11 is limited and the lifting is more stable.

[0023] In the fifth embodiment, the valve cover 2 is made of high-strength metal material, and the inner lining or sealing surface of the valve cover 2 is made of corrosion-resistant alloy or ceramic coating, so that the valve cover 2 is more solid and durable.

[0024] In the sixth embodiment, the two ends of the valve body 1 are welded with second flanges 18, the surfaces of the two second flanges 18 are provided with a plurality of mounting holes, and a flexible expansion joint is arranged at the connection between the valve body 1 and the valve cover 2, so as to facilitate the connection between the valve body 1 and the external pipeline, and the flexible expansion joint can reduce the structural deformation or sealing failure caused by temperature change.

[0025] In summary, the combined valve cover, when installed, installs the valve cover 2 on the first flange 3 through the bolt 8 and locks and fixes it through the nut 9, then rotates the multiple installation discs 6, rotates the multiple connecting plates 12 and the clamping rod 13 to the upper side of the valve cover 2, and makes the clamping rod 13 located on the upper side of the fixing block 14, then drives the screw sleeve 11 to descend through the rotation of the screw rod 10, thereby driving the screw sleeve 11 and the connecting plate 12 to descend, making the clamping rod 13 clamped into the clamping groove 15 of the fixing block 14, thereby further pressing and fixing the valve cover 2, making the installation connection between the valve cover 2 and the valve body 1 more tightly and stably. The valve cover can be quickly installed during use, and the valve cover 2 and the valve body 1 can be further reinforced through the pressing assembly 7, making the connection more tightly and stably.

Claims

1. A combined valve bonnet comprising a valve body (1), a bonnet (2), characterized in that: The top end of the valve body (1) is provided with a first flange (3), the side surface of the valve body (1) is fixedly connected with four mounting plates (4), each mounting plate (4) is provided with a damping rotating shaft (5), the upper end of each damping rotating shaft (5) is provided with a mounting disc (6), each mounting disc (6) is provided with a pressing assembly (7); The valve cover (2) and the first flange (3) are provided with corresponding threaded holes, the threaded holes of the valve cover (2) and the first flange (3) are internally and threadedly provided with bolts (8), and the bottom end of each bolt (8) is threadedly sleeved with a nut (9).

2. A combined valve bonnet according to claim 1, characterized in that: The pressing assembly (7) comprises a screw rod (10) rotatably mounted on the upper surface of the mounting disc (6), the surface of the screw rod (10) is threadedly sleeved with a screw sleeve (11), the side surface of the screw sleeve (11) is fixedly connected with a connecting plate (12), and the lower surface of the connecting plate (12) is fixedly connected with a clamping rod (13).

3. A combined valve bonnet according to claim 2, wherein: The upper surface of the valve cover (2) is fixedly connected with four fixed blocks (14), and the upper surface of each fixed block (14) is provided with a clamping groove (15) matched with the clamping rod (13).

4. A combined valve bonnet according to claim 3, wherein: The upper surface of each mounting disc (6) is fixedly connected with a sliding rod (16), the surface of each sliding rod (16) is slidably sleeved with a sliding sleeve (17), and each sliding sleeve (17) is fixedly connected with the corresponding screw sleeve (11).

5. A combined valve bonnet according to claim 4, wherein: The valve cover (2) is made of high-strength metal material, and the inner lining or sealing surface of the valve cover (2) is made of corrosion-resistant alloy or ceramic coating.

6. A combined valve bonnet according to claim 5, wherein: Both ends of the valve body (1) are welded with a second flange (18), a plurality of mounting holes are formed in the surfaces of the two second flanges (18), and a flexible expansion joint is arranged at the connection between the valve body (1) and the valve cover (2).

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