Gate valve device for molten material

Abstract

The utility model relates to valve technical field discloses a kind of gate valve devices of molten material, including valve body and gate assembly, gate assembly includes gate, gate and valve body sliding and sealing connection, gate assembly is connected with driving device to drive gate to slide in valve body, driving device is connected with valve body by fixed mechanism, the gate valve device of molten material is also provided with heating device to heat the material in valve body.The gate valve device of molten material can melt or keep molten state to the material flowing through the gate valve device of molten material.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, and more specifically to a gate valve device for molten materials. Background Technology

[0002] Over the past decade, my country's consumption of high-density polyethylene (HDPE) has grown at an average annual rate of 10%, significantly exceeding the world average. HDPE extrusion granulation units feed high-temperature molten materials; therefore, the material needs to be kept molten before entering the feed inlet of the extrusion granulation unit. Current gate valve devices cannot meet this requirement for HDPE production. Utility Model Content

[0003] The purpose of this invention is to overcome the problem that there is currently no gate valve device that can meet the production needs of high-pressure polyethylene, and to provide a gate valve device for molten materials, which can melt or keep the material flowing through the gate valve device in a molten state.

[0004] To achieve the above objectives, this utility model provides a gate valve device for molten materials, including a valve body and a gate assembly. The gate assembly includes a gate, which is slidably and sealingly connected to the valve body. The gate assembly is connected to a driving device to drive the gate to slide within the valve body. The driving device is connected to the valve body through a fixing mechanism. The gate valve device for molten materials is also provided with a heating device to heat the material within the valve body.

[0005] Preferably, the heating device is a jacketed device, which is fitted over the outside of the valve body.

[0006] Preferably, the jacketed device is provided with a medium inlet and a medium outlet, and the medium inlet and the medium outlet are connected to a jacketed flow channel to allow the introduction of heat transfer medium.

[0007] Preferably, the gate assembly further includes a connecting device, through which the gate is connected to the drive device.

[0008] Preferably, the connecting device includes a connector and a fixed shaft connected to the connector, the gate is connected to the fixed shaft, and the drive device is connected to the connector.

[0009] Preferably, the fixing mechanism includes a fixing frame and a sealing element. The fixing frame is connected to the valve body through the fixing element, and the gate is sealed to the valve body and slidably connected through the sealing element.

[0010] Preferably, the seal includes a sealing packing section and a pressure nut connected to the sealing packing section, the pressure nut being used to fasten the sealing packing section.

[0011] Preferably, the drive device is a hydraulic drive device, which includes a hydraulic cylinder, a piston rod and a piston, and the piston rod is connected to the gate assembly to drive the gate to move.

[0012] Preferably, the gate valve device for molten material is further provided with a position positioning device, which is electrically connected to the drive device to precisely control the position of the gate.

[0013] Preferably, the position positioning device includes a first position switch and a second position switch, and the positions of the first position switch and the second position switch correspond to the closed and open positions of the gate.

[0014] The above technical solution, by incorporating a heating device into the gate valve device for molten material, can heat the material within the valve body to a molten state or maintain it in a molten state without cooling, ensuring that the material enters the next stage of high-pressure polyethylene production in a molten state. This invention's device is safe, reliable, easy to manufacture, simple to operate, and highly operable. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the gate valve device for molten material; Figure 2 This is a detailed structural diagram of a gate valve device for molten material; Figure 3 This is a cross-sectional schematic diagram of a gate valve device for molten material.

[0016] Explanation of reference numerals in the attached figures 1. Valve body; 11. Valve body body; 12. Material inlet; 13. Material outlet; 2. Fixing mechanism; 21. Fixing frame; 22. Seal; 221. Sealing packing section; 222. Pressure nut; 23. Fixing component; 3. Drive device; 31. Hydraulic cylinder; 32. Piston rod; 33. Piston; 4. Heating device; 41. Medium inlet; 42. Medium outlet; 5. Gate assembly; 51. Gate; 52. Connecting component; 53. Fixed shaft; 6. Positioning device; 61. First position switch; 62. Second position switch. Detailed Implementation

[0017] The specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the scope of this utility model.

[0018] In this utility model, unless otherwise stated, directional terms such as "up, down, left, right, inside, outside, far, near, front" are generally used to refer to the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and therefore should not be construed as limiting this utility model.

[0019] like Figure 1 A gate valve device for molten material is shown, including a valve body 1 and a gate assembly 5. The gate assembly 5 includes a gate 51, which is slidably and sealingly connected to the valve body 1. The gate assembly 5 is connected to a driving device 3 to drive the gate 51 to slide within the valve body 1. The driving device 3 is connected to the valve body 1 through a fixing mechanism 2. The gate valve device for molten material is also provided with a heating device 4 to heat the material inside the valve body 1.

[0020] like Figure 1 and Figure 3 As shown, the gate valve device for molten material includes a valve body 1, a gate assembly 5, a fixing mechanism 2, a driving device 3, and a heating device 4. Among them, as... Figure 1 In the embodiment shown, the drive device 3 provides power support for the movement of the gate 51 within the valve body 1, the fixing mechanism 2 provides installation stability for the drive device 3, and the heating device 4 can heat the material flowing through the valve body 1 until it reaches the molten state required for production.

[0021] Specifically, the fixing mechanism 2 is fixedly connected to the side of the valve body 1. This fixing connection can be welded or bolted, preferably bolted, to facilitate disassembly for equipment maintenance. The drive device 3 is connected to the fixing mechanism 2, so that the drive device 3 can be stably installed on the valve body 1.

[0022] In such Figure 3 In the illustrated embodiment, the valve body 1 includes a valve body 11, a material inlet 12, and a material outlet 3. A guide groove is provided on the side wall of the valve body 11. The gate assembly 5 includes a gate 51, which is transversely inserted into the valve body 1 through the guide groove. The gate 51 is sealed and slidably connected to the valve body 1, and the gate assembly 5 is also connected to a drive device 3. That is, the connection between the gate 51 and the valve body 1 needs to maintain both sealing and slidability. Under the drive of the drive device 3, the gate 51 can reciprocate within the guide groove of the valve body 11, allowing the gate 51 to be in both open and closed states within the valve body 1.

[0023] When the production unit is running normally, the gate 51 is in the open state inside the valve body 1, so that the material flows from the material inlet 12 through the valve body 1 and is heated inside the valve body 1, so that the material is kept in a molten state. The molten material can be smoothly passed into the equipment of the next production process through the material outlet 13. When the production unit stops running, the drive device 3 controls the gate 51 to be in the closed state inside the valve body 1, so that the material stops flowing into the equipment of the next production process.

[0024] It should be noted that before the production unit can operate normally, the heating device 4 of the gate valve device for molten material needs to be turned on to preheat the valve body 1. After reaching the required temperature, the production unit can be started to ensure that the material can be heated to a molten state in time when it flows through the valve body 1, so as not to affect the material state required for the operation of the production unit.

[0025] Furthermore, the heating device 4 is a jacketed device, which is sleeved on the outside of the valve body 1.

[0026] like Figure 3 As shown, the heating device 4 is a jacketed device, which is located outside the valve body 11 of the valve body 1. The jacketed device can efficiently heat the valve body 1.

[0027] Furthermore, the jacketed device is provided with a medium inlet 41 and a medium outlet 42, and the medium inlet 41 and the medium outlet 42 are connected to a jacketed flow channel to allow the introduction of heat transfer medium.

[0028] Specifically, such as Figure 2 As shown, the jacketed device is equipped with a medium inlet 41 and a medium outlet 42, and flanges are provided at both the medium inlet 41 and the medium outlet 42 for connecting external heat transfer medium supply equipment. The jacketed device has a jacketed flow channel, which connects the medium inlet 41 and the medium outlet 42. The heat transfer medium is introduced through the medium inlet 41, flows through the jacketed flow channel, and then flows out through the medium outlet 42. The heat transfer medium is a high-efficiency heating medium, which can be heat transfer oil. In actual working conditions, taking heat transfer oil as an example, the temperature of heat transfer oil can reach above 300℃. Using heat transfer oil as the heat transfer medium of the heating device 4 can raise the temperature inside the valve body 1 to 100-180℃. Any material that can melt within this temperature range can use the gate valve device for melting materials of this utility model, such as the production of polyethylene, polypropylene, and EVA (ethylene-vinyl acetate copolymer).

[0029] Furthermore, the gate assembly 5 also includes a connecting device, through which the gate 51 is connected to the drive device 3.

[0030] The gate assembly 5 includes a gate 51 and a connecting device. The gate 51 is connected to the power output end of the drive device 3 through the connecting device, which improves the connection stability between the gate 51 and the drive device 3.

[0031] Furthermore, the connecting device includes a connector 52 and a fixed shaft 53 connected to the connector 52, the gate 51 is connected to the fixed shaft 53, and the drive device 3 is connected to the connector 52.

[0032] Specifically, such as Figure 2 and Figure 3 As shown, the connecting device includes a connector 52 and a fixed shaft 53. The gate 51 is connected to the fixed shaft 53, and this connection is fixed. This fixed connection can be integrally formed, welded, bolted, etc., but integrally formed is preferred due to its stronger structural stability. The connector 52 is located at the power output end of the drive device 3, and the connector 52 and the fixed shaft 53 can be stably connected by bolts. This achieves a stable connection between the drive device 3 and the gate 51.

[0033] Furthermore, the fixing mechanism 2 includes a fixing frame 21 and a sealing element 22. The fixing frame 21 is connected to the valve body 1 through the fixing element 23, and the gate 51 is sealed and slidably connected to the valve body 1 through the sealing element 22.

[0034] like Figure 2 and Figure 3 As shown, the fixing mechanism 2 includes a fixing frame 21 and a sealing element 22. The fixing frame 21 is used for mounting the drive device 3, and the sealing element 22 is used for sealing and sliding connection between the gate 51 and the valve body 11 of the valve body 1. The fixing frame 21 is connected to the valve body 11 of the valve body 1 by a fixing element 23, which is preferably a bolt fastener.

[0035] Furthermore, the seal 22 includes a sealing packing section 221 and a pressure nut 222 connected to the sealing packing section 221, the pressure nut 222 being used to fasten the sealing packing section 221.

[0036] Specifically, such as Figure 3 As shown, to further improve the sealing performance of the connection between the gate 51 and the valve body 1, the sealing element 22 is provided with a sealing packing section 221 and a pressure nut 222. During the reciprocating motion of the gate 51 and the fixed shaft 53, the sealing packing section 221 does not leak. The filling material of the sealing packing section 221 can be any sealing material capable of continuous operation for more than 40,000 hours; the preferred material for the sealing packing section 221 is RPTFE (modified polytetrafluoroethylene). The pressure nut 222 further compresses the filling material within the sealing packing section 221, further ensuring sealing stability.

[0037] Furthermore, the drive device 3 adopts a hydraulic drive device, which includes a hydraulic cylinder 31, a piston rod 32 and a piston 33. The piston rod 32 is connected to the gate assembly 5 to drive the gate 51 to move.

[0038] The drive device 3 can be any device capable of driving the gate 51 to reciprocate; a hydraulic drive device is one embodiment of the drive device 3. For example... Figure 2 and Figure 3 In the illustrated embodiment, the drive device 3 is a hydraulic drive device. The reciprocating movement of the piston 33 drives the piston rod 32 to reciprocate, thereby driving the gate 51 to reciprocate, allowing the gate 51 to freely be in an open or closed state within the valve body 1. Hydraulic drive devices are low in cost and highly practical.

[0039] Furthermore, the gate valve device for molten material is also equipped with a position positioning device 6, which is electrically connected to the drive device 3 to precisely control the position of the gate 51.

[0040] To achieve precise control of the gate valve 51's state, the gate valve device for molten material is also equipped with a position positioning device 6. The position positioning device 6, the drive device 3, and the control system in the central control room are electrically connected. The position positioning device 6 accurately positions the gate valve 51 in its two states, and, combined with the production demand signals from the control system in the central control room, transmits the signals to the drive device 3 to control its operation.

[0041] Specifically, after receiving the production demand signal from the control system in the central control room, the drive device 3 sends the operation signal to the drive device 3. The drive end of the drive device 3 drives the gate 51 to move to the target position. At this time, after the position positioning device 6 confirms that the position of the gate 51 is the target position, it sends a signal to stop moving the gate 51 to the drive device 3, thereby causing the drive device 3 to stop running.

[0042] Furthermore, the position positioning device 6 includes a first position switch 61 and a second position switch 62, the positions of the first position switch 61 and the second position switch 62 corresponding to the closed and open positions of the gate 51.

[0043] like Figure 2 In the illustrated embodiment, the first position switch 61 is positioned at the location where the gate 51 is in the closed state, and the second position switch 62 is positioned at the location where the gate 51 is in the open state (e.g., ...). Figure 2(The dotted line portion is shown). When the gate valve device for molten material stops operating, the gate 51 is in the closed position, which corresponds to the position of the first position switch 61. When the gate valve device for molten material needs to be opened, the heating device 4 needs to be turned on for preheating. After preheating, the control system in the central control room sends a signal to open the gate 51 to the drive device 3. The drive device 3 starts running and moves the gate 51 to the right to its maximum stroke. When the gate 51 moves to the rightmost position (the dotted line position in the figure), it corresponds to the position of the second position switch 62. At this time, the second position switch 62 detects that the gate 51 is in the open position and sends a stop signal to the drive device 3. The drive device 3 stops running after receiving the corresponding signal.

[0044] The gate valve device for molten materials of this utility model can meet the requirements of high temperature molten material feeding control of various polymer extrusion granulation units. The high temperature molten material or raw material transported from the upstream process equipment enters the gate valve device for molten materials through the material inlet 12. The material is heated in the valve body 1 of the gate valve device to keep the material in a molten state. The gate valve device for molten materials controls whether the high temperature molten material needs to enter the equipment of the next process through the opening or closing state of the gate 51.

[0045] When the gate 51 needs to be in the open state, it must retract to a suitable position to allow the molten material to smoothly enter the equipment of the next process through the material outlet 13; when the gate 51 needs to be in the closed state, it must advance to a suitable position to prevent the molten material from entering the equipment of the next process. The two position switches are set in appropriate positions to ensure that the piston rod 32 of the hydraulic cylinder 31 drives the gate 51 to move correctly and reliably, guaranteeing the accurate and reliable operation of the gate 51.

[0046] It should be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable way without contradiction. In order to avoid unnecessary repetition, this utility model will not describe the various possible combinations separately.

[0047] Furthermore, various different embodiments of this utility model can be combined in any way, as long as they do not violate the spirit of this utility model, they should also be regarded as the content disclosed by this utility model.

Claims

1. A gate valve device for molten material, characterized in that, The device includes a valve body (1) and a gate assembly (5). The gate assembly (5) includes a gate (51), which is slidably and sealingly connected to the valve body (1). The gate assembly (5) is connected to a drive device (3) to drive the gate (51) to slide within the valve body (1). The drive device (3) is connected to the valve body (1) through a fixing mechanism (2). The gate valve device for molten material is also provided with a heating device (4) to heat the material inside the valve body (1).

2. The gate valve device for molten material according to claim 1, characterized in that, The heating device (4) is a jacketed device, which is sleeved on the outside of the valve body (1).

3. The gate valve device for molten material according to claim 2, characterized in that, The jacketed device is provided with a medium inlet (41) and a medium outlet (42), and the medium inlet (41) and the medium outlet (42) are connected to a jacketed flow channel to allow the heat transfer medium to pass through.

4. The gate valve device for molten material according to claim 1, characterized in that, The gate assembly (5) further includes a connecting device, through which the gate (51) is connected to the drive device (3).

5. The gate valve device for molten material according to claim 4, characterized in that, The connecting device includes a connector (52) and a fixed shaft (53) connected to the connector (52). The gate (51) is connected to the fixed shaft (53), and the driving device (3) is connected to the connector (52).

6. The gate valve device for molten material according to claim 1, characterized in that, The fixing mechanism (2) includes a fixing frame (21) and a sealing element (22). The fixing frame (21) is connected to the valve body (1) through the fixing element (23). The gate (51) is sealed and slidably connected to the valve body (1) through the sealing element (22).

7. The gate valve device for molten material according to claim 6, characterized in that, The seal (22) includes a sealing packing section (221) and a pressure nut (222) connected to the sealing packing section (221), the pressure nut (222) being used to fasten the sealing packing section (221).

8. The gate valve device for molten material according to claim 1, characterized in that, The drive device (3) is a hydraulic drive device, which includes a hydraulic cylinder (31), a piston rod (32) and a piston (33). The piston rod (32) is connected to the gate assembly (5) to drive the gate (51) to move.

9. The gate valve device for molten material according to claim 8, characterized in that, The gate valve device for the molten material is also provided with a position positioning device (6), which is electrically connected to the drive device (3) to precisely control the position of the gate (51).

10. The gate valve device for molten material according to claim 9, characterized in that, The position positioning device (6) includes a first position switch (61) and a second position switch (62), and the positions of the first position switch (61) and the second position switch (62) correspond to the closed and open positions of the gate (51).

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