A lifting device for conveniently installing and disassembling the valve cone and valve seat on-site

Abstract

The present invention discloses a lifting device for facilitating on-site installation and disassembly of a valve cone and valve seat, including a valve pipe, on which a plurality of valve boxes are provided. Below the valve box, there is a valve seat support assembly, and a hydraulic adjustment assembly is provided on the valve seat support assembly. A set of semi-circular oil cylinders is provided on the valve box, and the semi-circular oil cylinders and the valve seat support assembly are connected by four sets of tension bolts. The beneficial effects of the present invention are as follows: In the present invention, when lifting and tensioning, the high-pressure oil pump is used to deliver hydraulic oil into the lifting cavity, so as to expand the lifting cavity to a certain height for tensioning. A sealing assembly is provided between the upper plate and the lower plate. The sealing assembly includes a bottom seal, an intermediate seal, and an upper seal. The bottom seal is a slurry seal, made of special sealing material, with the performance of high temperature and acid-base resistance. In addition to serving as the seal of the hydraulic cylinder, the upper seal also serves as the third safety seal for the slurry, thus achieving a good sealing effect.

Description

Technical Field

[0001] The present invention relates to a lifting device for a valve cone and valve seat, specifically a lifting device for facilitating on-site installation and disassembly of a valve cone and valve seat, belonging to the technical field of diaphragm pumps. Background Technique

[0002] The valve housing is an important component of the diaphragm pump equipment. Its internal important components include: valve cone, valve seat, guide sleeve, guide sleeve bracket, spring, etc. The opening and closing of the valve cone and valve seat enable the equipment to feed and discharge normally. The guide sleeve bracket and the internal guide sleeve are responsible for guiding the opening and closing of the valve cone, and the spring is responsible for the reset of the valve cone. Due to the harsh working environment of the diaphragm pump, the valve cone and valve seat need to be replaced regularly. The quality of the flowing medium determines the replacement frequency of the valve cone and valve seat. As a high-value key and important equipment, the length of the downtime of the diaphragm pump directly affects the economic benefits of users.

[0003] The existing inlet (outlet) feeding system connects three inlet (outlet) valve boxes into one by an integral inlet (outlet) feeding pipe. To remove any valve housing, it is necessary to disassemble the connections between the three valve boxes and the inlet (outlet) feeding pipe, and at the same time disassemble the connection between the inlet (outlet) and the external pipeline. This means that as long as there is a problem with one valve cone and valve seat, it is necessary to remove 32 screws in four circles. At the same time, a hydraulic wrench is used to remove each screw. The torque of the hydraulic wrench can only be roughly kept consistent through the parameter displayed on the pressure gauge of the hydraulic station. In fact, the force received by each screw is different, which increases the risk of bolt fracture. Therefore, to solve the above problems, we propose a lifting device for facilitating on-site installation and disassembly of a valve cone and valve seat. Summary of the Invention

[0004] The object of the present invention is to provide a lifting device for conveniently installing and disassembling valve cones and valve seats on site. The high-pressure oil pump transports hydraulic oil into the through-hole of the oil cylinder and feeds it into the oil storage cavity. While the oil cylinder jacks up the inner nut, it also stretches the tension bolt, that is, a preloading force is formed on the entire installation system for tensile fixation. At this time, the outer nut is gently rotated by hand to the surface of the semi-circular oil cylinder, and at the same time, the oil pump pressure is reduced to zero. Driven by the reset of the tension bolt, the inner nut is tightly pressed on the semi-circular oil cylinder, forming a complete installation cycle. Thus, under the action of a single high-pressure oil pump for the two oil inlets, each semi-circular oil cylinder has four independent oil cylinders. Through the inner nut and the outer nut to fasten the bolts, and through the inner nut and the outer nut to fasten the tension bolts, it is ensured that the pressures of the eight oil cylinders are consistent, so the forces on each tension bolt are also kept consistent. The tension bolts installed in this way are more durable and not easily broken due to the relatively uniform force, and the components in each valve box can be replaced individually. In the original structure, no matter which valve box had a problem, the connecting bolts of the three valve chambers and the inlet (outlet) pipe had to be removed, and at the same time, the connecting bolts of the inlet (outlet) pipe and the main pipe had to be removed. After adopting this device, any valve chamber with a problem can have the faulty valve box removed without touching other components, greatly saving time.

[0005] The present invention realizes the above object through the following technical solutions. A lifting device for conveniently installing and disassembling valve cones and valve seats on site includes a valve pipe, and a plurality of valve boxes are provided on the valve pipe. A valve seat support assembly is provided below the valve box, and a hydraulic adjustment assembly is provided on the valve seat support assembly. A group of semi-circular oil cylinders are provided on the valve box, and the semi-circular oil cylinders and the valve seat support assembly are connected by four groups of tension bolts.

[0006] The valve seat support assembly includes an upper plate installed on the bottom side of the valve box. A lower plate is provided below the upper plate, and a lifting cavity is provided between the upper plate and the lower plate. The hydraulic adjustment assembly is installed on the lower plate, and a flat gasket is placed in the lifting cavity.

[0007] The bottom end of the tension bolt movably penetrates through the upper plate and the lower plate, the top end of the tension bolt penetrates through the semi-circular oil cylinder, and an inner nut is installed at the top end of the tension bolt.

[0008] Preferably, the hydraulic adjustment assembly includes an oil cylinder delivery head installed on the lower plate. An oil cylinder delivery oil pipe is provided on the lower plate, the oil cylinder delivery oil pipe is connected to the oil cylinder delivery head, and one end of the oil cylinder delivery oil pipe extends into the lifting cavity.

[0009] Preferably, a sealing assembly is provided between the upper plate and the lower plate, and the sealing assembly includes a bottom seal, an intermediate seal, and an upper seal.

[0010] Preferably, the bottom seal is located at the lowest position, and the upper seal is located at the upper position.

[0011] Preferably, an oil storage cavity is formed between the inner nut and the semi-circular oil cylinder. The semi-circular oil cylinder is provided with an oil cylinder through hole, and the oil cylinder through hole is communicated with the oil storage cavity.

[0012] Preferably, a first sealing ring and a second sealing ring are arranged in the oil storage cavity, and the first sealing ring and the second sealing ring are installed on the contact gaps between the top side and the bottom side of the inner nut and the semi-circular oil cylinder.

[0013] Preferably, an outer nut is arranged outside the inner nut, and the inner nut and the outer nut are meshed with each other.

[0014] Preferably, a discharge pipe is arranged on one side of the valve box, and a connecting pipe body is arranged on the bottom side of the discharge pipe. The connecting pipe body is connected to the valve box.

[0015] The beneficial effects of the present invention are as follows:

[0016] 1. In the present invention, a valve seat support assembly is arranged below the valve box. When lifting and tightening, by using a high-pressure oil pump, hydraulic oil can be transported to the lifting cavity through the oil cylinder delivery head and the delivery oil pipe, so as to expand the lifting cavity to a certain height for tensioning. A sealing assembly is arranged between the upper plate and the lower plate. The sealing assembly includes a bottom seal, an intermediate seal and an upper seal arranged from bottom to top. The bottom seal is a slurry seal, made of special sealing material, with the properties of high temperature resistance and acid and alkali resistance. The upper seal not only serves as the seal of the hydraulic oil cylinder but also serves as the third safety seal of the slurry, so as to achieve a good sealing effect.

[0017] 2. In the present invention, at the same time, the high-pressure oil pump transports hydraulic oil into the oil cylinder through hole and then into the oil storage cavity. When the oil cylinder jacks up the inner nut, the tension bolt is stretched and elongated, that is, a preloading force is formed on the whole installation system for tensile fixation. At this time, the outer nut is gently rotated by hand to the surface of the semi-circular oil cylinder, and at the same time, the oil pump pressure is reduced to zero. Driven by the reset of the tension bolt, the inner nut is tightly pressed on the semi-circular oil cylinder, forming a complete installation cycle. Thus, under the action of one high-pressure oil pump for two oil inlets, each semi-circular oil cylinder has four independent oil cylinders. Through the inner nut and the outer nut to fasten the bolt, and through the inner nut and the outer nut to fasten the tension bolt, it is ensured that the pressures of the eight oil cylinders are consistent, so the forces on each tension bolt are also kept consistent. The tension bolts installed in this way are more durable and not easy to break because the forces are relatively uniform. The components in each valve box can be replaced separately. In the original structure, no matter which valve box has problems, the connecting bolts of the three valve chambers and the inlet (outlet) pipe need to be removed, and at the same time, the connecting bolts of the inlet (outlet) pipe and the main pipe need to be removed. After adopting this device, any valve chamber with problems can have the problematic valve box removed without moving other components, greatly saving time. Description of the Drawings

[0018] Figure 1 Schematic left - view three - dimensional structure diagram of a lifting device for conveniently installing and disassembling valve cones and valve seats on - site proposed by the present invention;

[0019] Figure 2 Schematic right - view three - dimensional structure diagram of a lifting device for conveniently installing and disassembling valve cones and valve seats on - site proposed by the present invention;

[0020] Figure 3 Schematic structure diagram of the valve box of a lifting device for conveniently installing and disassembling valve cones and valve seats on - site proposed by the present invention;

[0021] Figure 4 A lifting device for conveniently installing and disassembling valve cones and valve seats on - site proposed by the present invention Figure 3 Schematic structure diagram of part A in;

[0022] Figure 5 A lifting device for conveniently installing and disassembling valve cones and valve seats on - site proposed by the present invention Figure 3 Schematic structure diagram of part B in;

[0023] Figure 6 Schematic structure diagram of the flat gasket of a lifting device for conveniently installing and disassembling valve cones and valve seats on - site proposed by the present invention.

[0024] In the figure: 1, valve pipe; 2, valve box; 3, upper disc; 4, lower disc; 5, lifting cavity; 6, oil cylinder delivery head; 7, delivery oil pipe; 8, bottom seal; 9, intermediate seal; 10, upper seal; 11, tension bolt; 12, semi - circular oil cylinder; 13, oil cylinder through - hole; 14, oil storage cavity; 15, inner nut; 16, outer nut; 17, first sealing ring; 18, second sealing ring; 19, discharge pipe; 20, connecting pipe body; 21, flat gasket. Specific embodiments

[0025] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0026] Please refer to Figures 1-6 As shown, a lifting device for conveniently installing and disassembling valve cones and valve seats on - site includes a valve pipe 1. A plurality of valve boxes 2 are provided on the valve pipe 1. A valve seat support assembly is provided below the valve box 2. A hydraulic adjustment assembly is provided on the valve seat support assembly. A group of semi - circular oil cylinders 12 are provided on the valve box 2. The semi - circular oil cylinders 12 and the valve seat support assembly are connected by four groups of tension bolts 11;

[0027] The valve seat support assembly includes an upper disc 3 installed on the bottom side of the valve box 2. A lower disc 4 is provided below the upper disc 3. A lifting cavity 5 is provided between the upper disc 3 and the lower disc 4. The hydraulic adjustment assembly is installed on the lower disc 4. A flat gasket 21 is placed in the lifting cavity 5. The flat gasket 21 is provided as two semi-circular rings, and a plurality of notches are provided on the inner wall of the flat gasket 21, so that after the flat gasket is placed, it can be in contact with a plurality of tension bolts 11. The setting of the flat gasket 21 enables the upper disc 3 on the valve box 2 to be lifted, and then the flat gasket 21 is inserted into the lifting cavity 5 to play a supporting role;

[0028] The bottom end of the tension bolt 11 movably penetrates through the upper disc 3 and the lower disc 4, and the top end of the tension bolt 11 penetrates through the semi-circular oil cylinder 12. An inner nut 15 is installed at the top end of the tension bolt 11.

[0029] As a technical optimization scheme of the present invention, the hydraulic adjustment assembly includes an oil cylinder delivery head 6 installed on the lower disc 4. An oil cylinder delivery oil pipe 7 is provided on the lower disc 4. The oil cylinder delivery oil pipe 7 is connected to the oil cylinder delivery head 6. One end of the oil cylinder delivery oil pipe 7 extends into the lifting cavity 5. When lifting and tensioning, by using a high-pressure oil pump, hydraulic oil can be delivered into the lifting cavity 5 through the oil cylinder delivery head 6 and the delivery oil pipe 7, so as to expand the lifting cavity 5 to a certain height for tensioning.

[0030] As a technical optimization scheme of the present invention, a sealing assembly is provided between the upper disc 3 and the lower disc 4. The sealing assembly includes a bottom seal 8, an intermediate seal 9 and an upper seal 10. The bottom seal 8 is located at the lowest position, and the upper seal 10 is located at the upper position. A sealing assembly is provided between the upper disc 3 and the lower disc 4. The sealing assembly includes a bottom seal 8, an intermediate seal 9 and an upper seal 10 arranged from bottom to top. The bottom seal 8 is a slurry seal and is made of a special sealing material, having the properties of high temperature resistance and acid and alkali resistance. In addition to serving as the seal of the hydraulic cylinder, the upper seal 10 also serves as the third safety seal for the slurry, so as to achieve a good sealing effect.

[0031] As a technical optimization solution of the present invention, an oil storage cavity 14 is formed between the inner nut 15 and the semi-circular oil cylinder 12. An oil cylinder through hole 13 is provided on the semi-circular oil cylinder 12, and the oil cylinder through hole 13 is communicated with the oil storage cavity 14. A first sealing ring 17 and a second sealing ring 18 are provided in the oil storage cavity 14. The first sealing ring 17 and the second sealing ring 18 are installed on the contact gaps on the top side and the bottom side of the inner nut 15 and the semi-circular oil cylinder 12. An outer nut 16 is provided outside the inner nut 15, and the inner nut 15 and the outer nut 16 are meshed with each other. A discharge pipe 19 is provided on the top side of the valve box 2. A connecting pipe body 20 is provided on one side of the discharge pipe 19, and the connecting pipe body 20 is connected to the valve box 2. Hydraulic oil is conveyed into the oil cylinder through hole 13 by a high-pressure oil pump and then fed into the oil storage cavity 14. While the oil cylinder jacks up the inner nut 15, the tension bolt 11 is stretched and lengthened, that is, a preloading force is formed on the entire installation system. The tension bolt 11 adopts a new structure, which ensures safety stretching and will not break at the same time, and a stretching fixation is carried out. At this time, the outer nut 16 is gently rotated by hand to the surface of the semi-circular oil cylinder 12, and at the same time the oil pump pressure is reduced to zero. Driven by the reset of the tension bolt 11, the inner nut 15 is tightly pressed on the semi-circular oil cylinder 12, forming a complete installation cycle. Thus, under the action of a high-pressure oil pump at two oil inlets, each semi-circular oil cylinder 12 has four independent oil cylinders. By tightening the bolts with the inner nut 15 and the outer nut 16, and tightening the tension bolt 11 with the inner nut 15 and the outer nut 16, the pressures of the eight oil cylinders are ensured to be consistent. Therefore, the forces on each tension bolt 11 are also kept consistent. The tension bolts 11 installed in this way are more durable and not easy to break because the forces are relatively uniform. The components in each valve box 2 can be replaced separately. In the original structure, no matter which valve box 2 has a problem, the connecting bolts of the three valve chambers and the feed pipe need to be removed, and at the same time the connecting bolts of the feed pipe and the main pipe need to be removed. After adopting this device, any valve chamber with a problem can have the problematic valve box 2 removed without touching other components, which greatly saves time.

[0032] When the present invention is in use, the valve cone seat on the valve box 2 is installed and lifted. A valve seat support assembly is provided below the valve box 2. The upper plate 3 and the lower plate 4 on the valve seat support assembly are installed below the valve box 2, and there is a liftable lift cavity 5 in the middle. A set of semi-circular oil cylinders 12 are provided on the valve box 2. The semi-circular oil cylinders 12 are connected to the upper plate 3 and the lower plate 4 below through tension bolts 11. The bottom end of the tension bolt 11 is sleeved on the lower plate 4 and the upper plate 3 and is not easy to detach. The top end of the tension bolt 11 is connected to the semi-circular oil cylinder 12 through an inner nut 15 and an outer nut 16. When lifting and tightening, by using a high-pressure oil pump, hydraulic oil can be transported into the lift cavity 5 through the oil cylinder delivery head 6 and the delivery oil pipe 7, so as to expand the lift cavity 5 to a certain height for tensioning. The setting of the flat gasket 21 enables the flat gasket 21 to be inserted into the lift cavity 5 after the upper plate 3 on the valve box 2 rises, playing a supporting role. A sealing assembly is provided between the upper plate 3 and the lower plate 4. The sealing assembly includes a bottom seal 8, a middle seal 9, and an upper seal 10 arranged from bottom to top. The bottom seal 8 is a slurry seal and uses a special sealing material, having the properties of high temperature resistance and acid and alkali resistance. The upper seal 10 not only serves as the seal of the hydraulic oil cylinder but also serves as the third safety seal for the slurry, so as to achieve a good sealing effect. At the same time, hydraulic oil is transported into the oil cylinder through hole 13 by using a high-pressure oil pump and fed into the oil storage cavity 14. While the oil cylinder jacks up the inner nut 15, the tension bolt 11 is stretched and lengthened, that is, a preloading force is formed on the entire installation system. The tension bolt 11 adopts a new structure, ensuring that it will not break while ensuring safe stretching, and performing a stretching fixation. At this time, the outer nut 16 is gently rotated by hand to the surface of the semi-circular oil cylinder 12, and at the same time, the oil pump pressure is reduced to zero. Driven by the reset of the tension bolt 11, the inner nut 15 is tightly pressed on the semi-circular oil cylinder 12, forming a complete installation cycle. Thus, under the action of a high-pressure oil pump at two oil inlets, each semi-circular oil cylinder 12 has four independent oil cylinders. The tension bolt 11 is fastened by the inner nut 15 and the outer nut 16, and the eight oil cylinders have the same pressure, so the force on each tension bolt 11 is also consistent. The tension bolt 11 installed in this way is more durable and not easy to break because the force is relatively uniform, and the components in each valve box 2 can be replaced separately. In the original structure, no matter which valve box 2 had a problem, the connecting bolts of the three valve chambers and the feed pipe had to be removed, and at the same time, the connecting bolts of the feed pipe and the main pipe had to be removed. After adopting this device, any valve chamber with a problem can have the problematic valve box 2 removed without touching other components, greatly saving time.

[0033] In addition, it should be understood that although this specification is described in terms of embodiments, not every embodiment contains only an independent technical solution. This narrative style of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A lifting device for facilitating on-site installation and disassembly of a valve cone and valve seat, comprising a valve pipe (1), wherein a plurality of valve boxes (2) are arranged on the valve pipe (1), and the characteristics are as follows: A valve seat support assembly is provided below the valve box (2), and a hydraulic adjustment assembly is provided on the valve seat support assembly. A set of semi-circular oil cylinders (12) is provided on the valve box (2), and the semi-circular oil cylinders (12) and the valve seat support assembly are connected by four sets of tension bolts (11). The valve seat support assembly includes an upper plate (3) installed on the bottom side of the valve box (2). A lower plate (4) is provided below the upper plate (3). A lifting cavity (5) is provided between the upper plate (3) and the lower plate (4). The hydraulic adjustment assembly is installed on the lower plate (4), and a flat gasket (21) is placed in the lifting cavity (5). The bottom end of the tension bolt (11) movably penetrates through the upper plate (3) and the lower plate (4). The top end of the tension bolt (11) penetrates through the semi-circular oil cylinder (12), and an inner nut (15) is installed at the top end of the tension bolt (11). The hydraulic adjustment assembly includes an oil cylinder delivery head (6) installed on the lower plate (4). An oil cylinder delivery oil pipe (7) is provided on the lower plate (4). The oil cylinder delivery oil pipe (7) is connected to the oil cylinder delivery head (6), and one end of the oil cylinder delivery oil pipe (7) extends into the lifting cavity (5). An oil storage cavity (14) is formed between the inner nut (15) and the semi-circular oil cylinder (12). An oil cylinder through hole (13) is provided on the semi-circular oil cylinder (12), and the oil cylinder through hole (13) is communicated with the oil storage cavity (14).

2. The lifting device for conveniently installing and disassembling the valve cone and valve seat on site according to claim 1, wherein: A sealing assembly is provided between the upper plate (3) and the lower plate (4). The sealing assembly includes a bottom seal (8), an intermediate seal (9), and an upper seal (10).

3. The lifting device for conveniently installing and disassembling the valve cone and valve seat on site according to claim 2, characterized in that: The bottom seal (8) is located at the lowest position, and the upper seal (10) is located at the upper position.

4. The lifting device for conveniently installing and disassembling the valve cone and valve seat on site according to claim 3, wherein: A first sealing ring (17) and a second sealing ring (18) are provided in the oil storage cavity (14). The first sealing ring (17) and the second sealing ring (18) are installed on the contact gaps between the top and bottom sides of the inner nut (15) and the semi-circular oil cylinder (12).

5. The lifting device for conveniently installing and disassembling a valve cone and valve seat on site according to claim 1, wherein: An outer nut (16) is provided outside the inner nut (15), and the inner nut (15) and the outer nut (16) are meshed with each other.

6. The lifting device for conveniently installing and disassembling the valve cone and valve seat on-site according to claim 1, wherein: A discharge pipe (19) is provided on one side of the valve box (2). A connecting pipe body (20) is provided at the bottom side of the discharge pipe (19), and the connecting pipe body (20) is connected to the valve box (2).

Images