Spray valve sealing structure

Abstract

The utility model provides a spraying valve sealing structure, and relates to the field of valves, the spraying valve sealing structure comprises a valve body, a lower cylinder body, a connecting flange, a water pipe, a sealing washer and a sealing ring, the lower end of the valve body is coaxially and fixedly connected with the lower cylinder body by connecting the connecting flange, the connecting flange is fixedly connected to a polymerization kettle, and the lower cylinder body is inserted into the polymerization kettle; a coaxial through channel is arranged in the lower cylinder body, the connecting flange and the valve body, a water pipe is coaxially arranged in the channel in a sliding mode, the upper end of the water pipe is communicated with an external high-pressure water source, and the lower end of the water pipe is fixedly connected with a spray head. A sealing washer is embedded in an annular gap between the polymerization kettle and the connecting flange, and a sealing ring is installed between the valve body flange tightly attached to the outer wall of the valve body and the upper layer flange. According to the sealing structure, leakage is effectively prevented, the sealing ring is additionally arranged in the reserved gap, redundant gaps are filled, polymer is prevented from being generated in the gaps, and follow-up maintenance and disassembly are facilitated.

Description

Technical Field

[0001] This application belongs to the field of valves and relates to valve sealing technology, specifically a spray valve sealing structure. Background Technology

[0002] The CXF-110 spray valve used for cleaning polymerization reactors has a 2-3 mm gap between the valve connecting flange and the lower cylinder, as well as between the valve connecting flange and the polymerization reactor, due to installation process requirements. During maintenance and disassembly, it was discovered that after prolonged operation, the valve produces a very strong polymer that can cause it to jam, making disassembly difficult and complicating maintenance. Summary of the Invention

[0003] To address the shortcomings of existing technologies, this application provides a spray valve sealing structure.

[0004] The following technical solution is specifically adopted:

[0005] A spray valve sealing structure includes a valve body, a lower cylinder, a connecting flange, a water pipe, a sealing gasket, and a sealing ring. The lower cylinder is coaxially and fixedly connected to the lower end of the valve body via the connecting flange, which is fixedly connected to a polymerization reactor. The lower cylinder is inserted into the polymerization reactor. A coaxial through channel is provided between the lower cylinder, the connecting flange, and the valve body. A water pipe is coaxially and slidably arranged within the channel. The upper end of the water pipe is connected to an external high-pressure water source, and the lower end of the water pipe is fixedly connected to a spray head.

[0006] The connecting flange is a double-layer flange with upper and lower flanges arranged coaxially. The lower flange is fixed to the polymerization reactor by multiple bolts evenly distributed in a ring. There is an annular gap on the lower outer periphery of the lower flange. A sealing gasket is embedded in the annular gap between the polymerization reactor and the connecting flange.

[0007] The upper flange is connected to the valve body. A valve body flange is fixedly installed on the lower outer periphery of the valve body. The valve body flange and the upper flange are connected by multiple bolts evenly distributed in a ring. A sleeve is fitted in the middle of the bolts between the valve body flange and the upper flange. A sealing ring is installed between the valve body flange and the upper flange, which are close to the outer wall of the valve body.

[0008] Furthermore, a nozzle sealing structure is provided on the lower inner circumference of the lower cylinder.

[0009] Furthermore, a packing seal structure is provided on the inner circumference of the connecting flange that slides in contact with the water pipe.

[0010] Furthermore, the packing sealing structure includes packing, a copper ring, and a gland. An annular packing chamber is provided at the upper part of the inner hole of the connecting flange. The packing chamber is filled with packing, which tightly abuts against the outer wall of the water pipe. A copper ring is provided at the upper end of the packing in the packing chamber. The size of the copper ring matches the packing chamber, and the copper ring can be embedded between the water pipe and the connecting flange. A gland is embedded at the upper end of the copper ring and is fixed to the connecting flange.

[0011] In summary, the technical solutions provided in the embodiments of this application have the following technical effects or advantages:

[0012] The sealing structure of this application effectively prevents leakage, and a sealing ring is added in the reserved gap to fill the excess gap, prevent the formation of polymers in the gap, and facilitate subsequent maintenance and disassembly. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure.

[0014] Figure 2 for Figure 1 Enlarged schematic diagram of section A in the middle.

[0015] Meaning of reference numerals in the attached diagram: 1. Valve body; 2. Water pipe; 3. Connecting flange; 4. Lower cylinder; 5. Nozzle; 6. Copper ring; 7. Gland; 8. Valve body flange; 9. Sleeve; 10. Packing; 11. Sealing gasket; 12. Sealing ring; Detailed Implementation

[0016] To enable those skilled in the art to better understand the technical solutions in this specification, the technical solutions in the embodiments of this specification will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments.

[0017] A spray valve sealing structure, see Figure 1 As shown, it includes valve body 1, lower cylinder 4, connecting flange 3, water pipe 2, sealing gasket 11, and sealing ring 12.

[0018] The lower end of the valve body 1 is coaxially fixedly connected to the lower cylinder 4 via the connecting flange 3. The connecting flange 3 is fixedly connected to the polymerization reactor. The lower cylinder 4 is inserted into the polymerization reactor. The lower cylinder 4, the connecting flange 3, and the valve body 1 are provided with a coaxial through channel. A water pipe 2 is coaxially slidably installed in the channel. The upper end of the water pipe 2 is connected to an external high-pressure water source. The lower end of the water pipe 2 is fixedly connected to a nozzle 5. The water pipe 2 can drive the nozzle 5 to move up and down. When the nozzle 5 extends out of the lower cylinder 4, the high-pressure water source in the water pipe 2 can be sprayed out to clean the inside of the polymerization reactor.

[0019] The connecting flange 3 is a double-layer flange with upper and lower layers arranged coaxially. The lower flange is fixed to the polymerization reactor by multiple bolts evenly distributed in a ring. A process-reserved annular gap is provided on the lower outer periphery of the lower flange, and a sealing gasket 11 is embedded in the gap.

[0020] The upper flange is connected to the valve body 1. A valve body 1 flange is fixedly installed on the lower outer periphery of the valve body 1. The valve body 1 flange is connected to the upper flange by multiple bolts evenly distributed in a ring. A sleeve 9 is fitted in the middle of the bolts between the valve body 1 flange and the upper flange to ensure that the installation gap is reserved for easy maintenance and disassembly. A sealing ring 12 is installed between the valve body 1 flange and the upper flange, which are close to the outer wall of the valve body 1, to enhance the sealing of the connection surface between the valve body 1 and the flange.

[0021] See appendix Figure 2 As shown, a nozzle 5 sealing structure is provided on the lower inner circumference of the lower cylinder 4 to prevent the nozzle 5 from spraying water. However, some water will still spray into the lower cylinder 4. It is necessary to prevent water from entering the connecting flange 3 and the valve body 1. A packing 10 sealing structure is provided on the inner circumference of the connecting flange 3, which slides in contact with the water pipe 2. The specific structure includes packing 10, copper ring and gland 7. An annular packing chamber is provided on the upper part of the inner hole of the connecting flange 3. The packing chamber is filled with packing 10. The packing 10 tightly abuts against the outer wall of the water pipe 2. A copper ring 6 is provided on the upper end of the packing 10 in the packing chamber. The size of the copper ring 6 matches the packing chamber. The copper ring 6 can be embedded between the water pipe 2 and the connecting flange 3.

[0022] A pressure cap 7 is embedded in the upper end of the copper ring 6. The pressure cap 7 is fixedly connected to the flange 3, thereby compressing the packing 10 and keeping the packing 10 effectively sealed.

[0023] The foregoing description is merely an exemplary embodiment of this disclosure and should not be construed as limiting the scope of this disclosure. Any equivalent changes and modifications made in accordance with the teachings of this disclosure shall still fall within the scope of this disclosure. Those skilled in the art will readily conceive of other embodiments of this disclosure upon considering the specification and the disclosure of practical truth. This application is intended to cover any variations, uses, or adaptations of this disclosure that follow the general principles of this disclosure and include common knowledge or customary techniques in the art not described in this disclosure. The specification and embodiments are considered exemplary only, and the scope and spirit of this disclosure are defined by the claims.

Claims

1. A spray valve sealing structure, characterized in that, The device includes a valve body (1), a lower cylinder (4), a connecting flange (3), a water pipe (2), a sealing gasket (11), and a sealing ring (12). The lower end of the valve body (1) is coaxially and fixedly connected to the lower cylinder (4) through the connecting flange (3). The connecting flange (3) is fixedly connected to the polymerization reactor. The lower cylinder (4) is inserted into the polymerization reactor. The lower cylinder (4), the connecting flange (3), and the valve body (1) are provided with a coaxial through channel. A water pipe (2) is coaxially and slidably installed in the channel. The upper end of the water pipe (2) is connected to an external high-pressure water source, and the lower end of the water pipe (2) is fixedly connected to a nozzle (5). The connecting flange (3) is a double-layer flange with upper and lower layers arranged coaxially. The lower flange is fixedly connected to the polymerization reactor by multiple bolts evenly distributed in a ring. An annular gap is provided on the lower outer periphery of the lower flange. A sealing gasket (11) is embedded in the annular gap between the polymerization reactor and the connecting flange (3). The upper flange is connected to the valve body (1). A valve body (1) flange is fixedly installed on the lower outer periphery of the valve body (1). The valve body (1) flange is connected to the upper flange by multiple bolts evenly distributed in a ring. A sleeve (9) is fitted in the middle of the bolts between the valve body (1) flange and the upper flange. A sealing ring (12) is installed between the valve body (1) flange that is close to the outer wall of the valve body (1) and the upper flange.

2. The spray valve sealing structure according to claim 1, characterized in that, The lower inner circumference of the lower cylinder (4) is provided with a nozzle (5) sealing structure.

3. The spray valve sealing structure according to claim 1, characterized in that, The inner circumference of the connecting flange (3) that slides in contact with the water pipe (2) is provided with a packing (10) sealing structure.

4. The spray valve sealing structure according to claim 3, characterized in that, The sealing structure of the packing (10) includes packing (10), copper ring and gland (7). An annular packing chamber is provided at the upper part of the inner hole of the connecting flange (3). The packing chamber is filled with packing (10). The packing (10) tightly abuts against the outer wall of the water pipe (2). A copper ring (6) is provided at the upper end of the packing (10) in the packing chamber. The size of the copper ring (6) matches the packing chamber. The copper ring (6) can be embedded between the water pipe (2) and the connecting flange (3). A gland (7) is embedded at the upper end of the copper ring (6). The gland (7) is fixed to the connecting flange (3).

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