Kettle bottom cast strip valve easy to clean

Abstract

The utility model discloses a kettle bottom cast strip valve easy to clean, which comprises a ball valve upper body and a ball valve lower body, the ball valve upper body is fixedly connected with the ball valve lower body through a fixing component, the ball valve upper body is fixedly connected with the bottom of a reaction kettle body, and balls are arranged in the ball valve upper body and the ball valve lower body. A valve rod matched with the ball body is arranged on the side wall of the lower ball valve body, a second through hole is formed in one end of the lower ball valve body, a plugging assembly is arranged at the end, and an auxiliary assembly is arranged at the end, away from the second through hole, of the lower ball valve body. The discharging device can be quickly opened during discharging, the distance of materials flowing from a reaction kettle to a strip casting plate is very short, and irregular tailing slices are greatly reduced; residual materials hung on the discharging channel at the bottom of the kettle are less, so that the waste of the materials can be reduced; the cast strip plate can be conveniently and independently cleaned, and residual materials in a channel can be cleaned; in the opening and closing process of the ball body, materials do not form large blocks and are condensed on a valve seat sealing ring to affect the sealing effect.

Description

Technical Field

[0001] The utility model relates to the technical field of polymer processing, in particular to a kettle bottom casting belt valve which is easy to clean. Background Art

[0002] During the polyester melt pelletizing process, the polyester melt is conveyed at a constant pressure through a bottom valve to a strip casting head, forming round strips. After being water- or air-cooled, it is then fed into a pelletizer and cut into cylindrical pellets. Currently, the bottom valve in polyester production reactors is primarily a downward-spreading discharge valve, connected to the reactor bottom outlet via a flange. The bottom valve outlet is also flanged to the strip casting head.

[0003] The downward-type discharge valve has a long opening and closing stroke, which is time-consuming and labor-intensive. The length of the structure from the bottom outlet of the reactor to the strip head is too long, which has a great impact on the regularity of the tail material slices, and a lot of material will be hung inside the downward-type discharge valve, causing waste; when discharging, more heat medium is also needed to heat the downward-type discharge valve and the strip head to ensure the fluidity of the material, resulting in energy waste. If the residual material on the sealing surface of the downward-type discharge valve cools and solidifies, it will affect the sealing performance. At the end of discharging, there will be residual material in the inner cavity of the strip head, which will flow down and solidify in the melt pipe and the strip head outlet, and oxidize and even coke during the long-term heating process, affecting the performance of subsequent batches of materials. When washing the reactor, it affects the discharge of the washing liquid during the washing process, and also makes it difficult to clean the strip head.

[0004] Although the existing ball valve type discharge mechanism shortens the length of the valve part, when granulation is required, the melt still needs to flow through the melt pipe from the valve to the casting strip head. Therefore, we designed an easy-to-clean kettle bottom casting strip valve. Utility Model Content

[0005] The purpose of the utility model is to provide a kettle bottom casting strip valve which is easy to clean, so as to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an easy-to-clean kettle bottom cast strip valve, comprising a ball valve upper body and a ball valve lower body, the ball valve upper body and the ball valve lower body being fixedly connected by a fixing assembly, the ball valve upper body being fixedly connected to the bottom of the reactor kettle body, a ball body being provided inside the ball valve upper body and the ball valve lower body, a valve stem matching the ball body being provided on the side wall of the ball valve lower body, a through hole 2 being provided at one end of the ball valve lower body, and a blocking assembly being provided at the end, an auxiliary assembly being provided at the end of the ball valve lower body away from the through hole 2, and a channel being provided in the ball body.

[0007] Preferably, in order to facilitate the outflow of materials to form round strips for subsequent processing, a casting strip plate is provided inside the channel, and leakage holes are equidistantly opened on the casting strip plate, and the leakage holes match the channel.

[0008] Preferably, in order to facilitate the positioning of the casting strip plate without affecting its use and to facilitate subsequent removal operations, a casting strip plate retaining groove is provided in the sphere, and the casting strip plate retaining groove matches the casting strip plate.

[0009] Preferably, in order to ensure the sealing effect, the ball is interference-fitted with the inner wall of the upper body and the lower body of the ball valve to form a valve seat sealing ring.

[0010] Preferably, in order to facilitate connection and fixation, and to facilitate adjustment of the pressure between the ball and the valve seat sealing ring, the fixing assembly includes a ball valve upper body lower flange symmetrically arranged under the ball valve upper body, and a ball valve lower body upper flange symmetrically arranged on the ball valve lower body, the ball valve upper body lower flange and the ball valve lower body upper flange are fixedly connected by bolts, and a ball valve compression sealing gasket is provided between the ball valve upper body lower flange and the ball valve lower body upper flange.

[0011] Preferably, in order to be able to seal during use and facilitate subsequent removal operations, and to provide nitrogen protection to the interior through the nitrogen interface to avoid oxidation and coking, the sealing assembly includes a through-hole second cover plate arranged on the side wall of the lower body of the ball valve, and the through-hole second cover plate is provided with a through-hole second sealing gasket that matches the through-hole second of the lower body of the ball valve, and a nitrogen interface is provided in the middle of the through-hole second cover plate.

[0012] Preferably, in order to facilitate the subsequent removal operation of the cast strip plate, the auxiliary component includes a through hole 1 opened at one end of the lower body of the ball valve away from the through hole 2, and a through hole 1 cover is provided at the end of the through hole 1.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] The easy-to-clean kettle bottom casting strip valve can be opened quickly during discharge, the distance the material flows from the reactor to the casting strip plate is very short, and the number of irregular tail material slices will be greatly reduced; there is less residual material attached to the channel for discharging the material at the bottom of the kettle, which can reduce material waste; since the melt flow path is short, the energy consumption for insulating the valve is reduced; after the discharge is completed, the easy-to-clean kettle bottom casting strip valve is closed, and the casting strip plate can be taken out from the through hole 2 on one side of the lower body of the ball valve for separate cleaning, and the residual material in the channel can also be cleaned; during the ball switching process, no material will form large lumps and condense on the valve seat sealing ring to affect its sealing effect; nitrogen protection can also be provided for the channel through the nitrogen interface of the through hole 2 cover plate to avoid oxidation and coking of the material at the discharge port; heating mechanisms are arranged on the upper body and the lower body of the ball valve for heating, and an insulation mechanism is arranged on the outer wall of the easy-to-clean kettle bottom casting strip valve to ensure the fluidity of the material during discharge. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a front cross-sectional view of an easy-to-clean cast-belt valve on the bottom of a kettle proposed in the present invention;

[0016] Figure 2This is a right side view of an easy-to-clean cast belt valve on the bottom of a kettle proposed in the utility model;

[0017] Figure 3 The utility model provides a front view and a side sectional view of the second cover plate of the through hole in the cast belt valve at the bottom of the kettle which is easy to clean.

[0018] In the figure: 1. Ball valve upper body; 2. Ball valve upper body lower flange; 3. Ball valve lower body upper flange; 4. Through hole one cover; 5. Through hole one; 6. Cast strip plate slot; 7. Ball valve lower body; 8. Ball; 9. Reactor body; 10. Valve seat sealing ring; 11. Ball valve compression sealing gasket; 12. Through hole two sealing gasket; 13. Nitrogen interface; 14. Through hole two cover; 15. Cast strip plate; 16. Through hole two; 17. Valve stem; 18. Channel. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0020] See also Figure 1-Figure 3 The utility model provides an embodiment of an easy-to-clean kettle bottom casting strip valve, comprising a ball valve upper body 1 embedded in the central part of the bottom of the reactor body 9 (partially shown in the figure), which can be installed and fixed by welding, so that the polyester melt can be conveniently transported to the casting strip plate 15 through the bottom valve at a constant pressure to form a round strip, and then convenient for subsequent processing such as pelletizing. The valve upper body 1 and the ball valve lower body 7 are fixedly connected by a fixing component, which can be conveniently connected and fixed. A ball 8 is provided inside the ball valve upper body 1 and the ball valve lower body 7, and a valve body through hole is opened inside the ball valve upper body 1 and the ball valve lower body 7. A channel 18 is opened inside the ball 8 and is connected to the valve body through hole. The valve body through hole matches the reactor outlet, which is convenient for connection and discharge operation. A valve stem 17 for convenient rotation adjustment of the ball 8 is rotatably provided on the side wall of the ball valve lower body 7, so as to facilitate opening and closing operations.

[0021] See also Figure 1-Figure 3In order to facilitate the outflow of materials and form round strips, which is convenient for subsequent cooling and pelletizing, a through hole 16 is provided at one end of the lower body 7 of the ball valve, and a casting strip plate 15 is provided in the channel 18. Leakage holes are equidistantly provided on the ball valve to facilitate the outflow of materials to form round strips. At the same time, it is convenient to install and remove the material through the leakage holes (which can be operated by tools such as hooks). A casting strip plate slot 6 is provided inside the ball body 8 (the bottom after rotation and circulation), which can be used to engage and limit the casting strip plate 15 to prevent it from moving out without affecting the outflow of materials. In order to ensure the sealing effect after the ball body 8 is rotated, the circumferential side surfaces of the top and bottom ends of the ball body 8 (in the closed state) are provided with A valve seat sealing ring 10 is interference fit with the inner walls of the upper body 1 and the lower body 7 of the ball valve. A through-hole second cover plate 14 of a sealing component is provided on the side wall of the lower body 7 of the ball valve. Through-hole second sealing gaskets 12 matching through-hole second 16 on the lower body 7 of the ball valve are bonded to the upper and lower parts thereof. A nitrogen interface 13 is installed in the middle of the through-hole second cover plate 14, which can conveniently provide nitrogen protection for the channel 18 to avoid oxidation and coking of materials at the discharge port. A through-hole 15 of an auxiliary component is provided at the end of the lower body 7 of the ball valve away from the through-hole 16, which can conveniently poke the cast strip plate 15 out of the through-hole 16 with the help of tools, facilitating cleaning operations. A through-hole cover 4 can be provided on the end of the through-hole 15 by threading or snap-fitting.

[0022] See also Figure 1-Figure 3 In order to facilitate the connection and fixation of the ball valve upper body 1 and the ball valve lower body 7, and to facilitate the adjustment of the pressure between the ball 8 and the valve seat sealing ring 10, the ball valve upper body lower flange 2 of the fixing assembly is symmetrically welded under the ball valve upper body 1, and the ball valve lower body upper flange 3 is symmetrically welded on the ball valve lower body 7. The ball valve upper body lower flange 2 and the ball valve lower body upper flange 3 are fixedly connected by bolts, and a ball valve compression sealing gasket 11 is provided between the ball valve upper body lower flange 2 and the ball valve lower body upper flange 3. Correspondingly, a heating mechanism is provided on the ball valve upper body 1 and the ball valve lower body 7 for heating, and an insulation mechanism is provided on the outer wall of the valve with the bottom casting strip that is easy to clean. The heating mechanism can be a heating mechanism in the form of electric heating wire, steam, thermal oil, etc., and the insulation mechanism can be insulation cotton, etc., which are relatively mature technologies and will not be described in detail here.

[0023] Working principle: When using the utility model, the valve seat sealing ring 10 is placed in the ball valve upper body 1 and the ball valve lower body 7, the ball 8 is placed inside the ball valve lower body 7, the ball valve compression sealing gasket 11 is placed on the ball valve lower body upper flange 3, the valve stem 17 is installed, and the ball valve lower body upper flange 3 and the ball valve upper body lower flange 2 are connected together by bolts. The pressure between the ball 8 and the valve seat sealing ring 10 can be regulated by adjusting the tightness of the bolts; during the reaction, the ball 8 is in a closed state, and a tool is used to feed the cast strip plate 15 into the channel 18 through the through hole 16, and fit it together with the cast strip plate slot 6; then the through hole 2 sealing gasket 12 is placed on the through hole 2 cover plate 14, and then placed on the through hole 16, and the through hole 2 cover plate 14 is compressed using a quick release device. Such as threaded connection, lock locking, quick clamp pressing, etc., and the heating mechanism and insulation mechanism can ensure the fluidity of the material when discharging. After the reaction is completed, the valve stem 17 is rotated counterclockwise to open the ball 8, and nitrogen is filled to increase the pressure. The material enters the channel 18 from the lower outlet of the reactor and flows out from the holes of the cast strip plate 15 to form round strips. After water cooling or air cooling, it is sent to the pelletizer to be cut into cylindrical particles. After the discharge is completed, the valve stem 17 is rotated clockwise to close the ball 8, and the through-hole cover 4 and the through-hole cover plate 14 are opened. The cast strip plate 15 is poked out of the through-hole 16 from the through-hole 15 with a tool for cleaning. At the same time, the channel 18 can also be cleaned with a tool. If the next reactor reaction is about to be carried out without washing the reactor, the cast strip plate 15 can be placed in the channel 18 after preliminary cleaning of the channel 18 and the cast strip plate 15, and nitrogen is introduced into the channel 18 through the nitrogen interface 13 on the through-hole cover plate 14 to protect the internal residual material, thereby reducing waste during the next discharge.

[0024] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

Claims

1. An easy-to-clean bottom cast strip valve, comprising a ball valve upper body (1) and a ball valve lower body (7), characterized in that: The upper body (1) of the ball valve and the lower body (7) of the ball valve are fixedly connected via a fixing assembly. The upper body (1) of the ball valve is fixedly connected to the bottom of the reactor body (9). A ball (8) is provided inside the upper body (1) of the ball valve and the lower body (7). A valve stem (17) matching the ball (8) is provided on the side wall of the lower body (7). A channel (18) is provided inside the ball (8). A casting strip plate (15) is provided inside the channel (18). A leak hole is provided on the casting strip plate (15), and the leak hole matches the channel (18).

2. The easy-to-clean bottom casting strip valve according to claim 1, characterized in that: The sphere (8) is located in the channel (18) and is provided with a casting strip plate slot (6), and the casting strip plate slot (6) matches the casting strip plate (15).

3. The easy-to-clean bottom casting strip valve according to claim 2, characterized in that: The ball (8) is interference-fitted with the inner walls of the ball valve upper body (1) and the ball valve lower body (7) to form a valve seat sealing ring (10).

4. The easy-to-clean bottom casting strip valve according to claim 3, characterized in that: The fixing assembly comprises a ball valve upper body lower flange (2) symmetrically arranged under the ball valve upper body (1), a ball valve lower body upper flange (3) symmetrically arranged on the ball valve lower body (7), the ball valve upper body lower flange (2) and the ball valve lower body upper flange (3) are fixedly connected by bolts, and a ball valve compression sealing gasket (11) is arranged between the ball valve upper body lower flange (2) and the ball valve lower body upper flange (3).

5. The easy-to-clean bottom casting strip valve according to claim 4, characterized in that: A through hole 2 (16) is provided at one end of the ball valve lower body (7), and a blocking component is provided at the end of the through hole 2 (16). The blocking component includes a through hole 2 cover plate (14) arranged on the side wall of the ball valve lower body (7), a through hole 2 sealing gasket (12) matching the through hole 2 (16) of the ball valve lower body (7) is provided on the through hole 2 cover plate (14), and a nitrogen interface (13) is provided in the middle of the through hole 2 cover plate (14).

6. The easy-to-clean bottom casting strip valve according to claim 5, characterized in that: An auxiliary component is provided at the end of the ball valve lower body (7) away from the second through hole (16), and the auxiliary component includes a first through hole (5) opened at the end of the ball valve lower body (7) away from the second through hole (16), and a first through hole cover (4) is provided at the end of the first through hole (5).

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