An explosion-proof temperature control valve for a chemical product production line
Patent Information
- Application Number
- CN202522559768.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-02
- Publication Date
- 2026-10-23
- Estimated Expiration
- 2035-12-02
AI Technical Summary
[0003]现有防爆型温控调节阀多以防爆外壳完全隔离电控模块，通过壳体刚度，抗压内部产生的爆炸，并阻止火焰外泄，使爆炸与外部空间隔离达到防爆的效果，但该方式在使用中仍存在以下问题：完全封闭的防爆外壳无法泄放爆炸产生的高压气体，若爆炸压力超过壳体耐受极限，则可能导致壳体变形、破裂甚至飞溅，引发二次伤害
1、本实用新型设置的防爆罩和滑动泄压机构，当电磁控制模块调节管路流量的过程中，当电磁控制模块与防爆罩之间存在化学介质被电火花引燃发生爆炸时，爆炸高压气体冲击滑动泄压机构，使滑动泄压机构，向外层腔室一侧移动，增大内层腔室容积，从而减轻爆炸对防爆罩，内壁冲击，如此一来，使防爆罩壳体与其它机构的配合密封处能够维持原有配合状态，使配合机构维持原有设定性能，延长防爆罩的使用寿命。
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Figure CN224886414U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of regulating valve technology, and in particular to an explosion-proof temperature control valve for a chemical product production line. Background Technology
[0002] Temperature control valves, as a type of regulating valve, are widely used in chemical production lines. Chemical production has stringent requirements for parameters such as fluid flow, pressure, and temperature; fluctuations in these parameters can easily lead to substandard product quality or even accidents. Continuous proportional regulation of chemical media is achieved by precisely adjusting the valve core's opening through control system electrical signals, which is one of the most common methods in modern chemical production. Since many chemical media are flammable and explosive, temperature control valves with explosion-proof functions must be used when driving the valve core through an electrical signal system to prevent electrical sparks and high temperatures generated during operation from igniting the chemical media and causing harm.
[0003] Existing explosion-proof temperature control valves mostly use explosion-proof shells to completely isolate the electrical control module. The shell rigidity resists explosions generated inside and prevents flame leakage, thus isolating the explosion from the external space to achieve the explosion-proof effect. However, this method still has the following problems in use: the completely sealed explosion-proof shell cannot release the high-pressure gas generated by the explosion. If the explosion pressure exceeds the shell's tolerance limit, it may cause the shell to deform, crack, or even splash, causing secondary damage. Utility Model Content
[0004] The purpose of this utility model is to provide an explosion-proof temperature control valve for a chemical product production line in order to solve the above-mentioned problems.
[0005] This utility model achieves the above objectives through the following technical solutions: An explosion-proof temperature control valve for a chemical product production line includes a valve body and a valve core. An electromagnetic control module is located above the valve core, and a control rod is connected between the electromagnetic control module and the valve core. An explosion-proof cover is located outside the electromagnetic control module, and a sliding pressure relief mechanism is slidably fitted inside the explosion-proof cover. The sliding pressure relief mechanism divides the interior of the explosion-proof cover into inner and outer chambers. A quenching mesh is located on the side of the sliding pressure relief mechanism near the inner chamber, which blocks the flame from flowing out of the inner chamber. The sliding pressure relief mechanism increases the volume of the inner chamber by moving to relieve pressure during an explosion.
[0006] Preferably, the explosion-proof cover includes an explosion-proof shell with a cross-shaped structure. A bottom sealing plate is fixed to the lower end of the explosion-proof shell, and the control rod is fixed to the explosion-proof shell through the bottom sealing plate. A limit top cover is fixed to the upper end of the explosion-proof shell for fixing the electromagnetic control module. One horizontal end of the explosion-proof shell is provided with a pressure relief sealing plate that cooperates with the sliding pressure relief mechanism, and the other end is provided with a fixed partition. The fixed partition and the electromagnetic control module are a cooperating mechanism. Flame-retardant limit rings for installing quenching mesh are fixed on the cooperating end of the explosion-proof shell and the inner wall.
[0007] Preferably, the sliding pressure relief mechanism includes a sealing sleeve embedded in the center of the pressure relief sealing plate, a sliding piston rod slidingly fitted inside the sealing sleeve, a pressure relief plate fixed on the sliding piston rod and slidingly fitted with the inner cavity of the explosion-proof shell, a buffer spring provided between the pressure relief plate and the pressure relief sealing plate, and a limit sleeve screwed onto the outer wall of one end of the sliding piston rod that passes through the pressure relief sealing plate.
[0008] Preferably, the electromagnetic control module includes a drive module fitted inside the explosion-proof housing. The lower end of the drive module is connected to the control rod, and the upper end of the drive module is fixed to the limit cover. A sealing wiring pipe is fixedly connected to one end of the drive module. The sealing wiring pipe passes through the fixed partition. A sleeve for sealing is fixed between the outer wall of the sealing wiring pipe and the fixed partition. A fixed wire groove for wiring sealing is embedded in the explosion-proof housing at the location corresponding to the sealing wiring pipe.
[0009] Preferably, a pressure relief hole is provided at the mating point between the explosion-proof housing and the sliding pressure relief mechanism, and an explosion-proof pressure relief pipe is fixed at the pressure relief hole. The pressure relief plate and the explosion-proof pressure relief pipe are mating mechanisms. By the displacement of the pressure relief plate, the communication state between the inner cavity of the explosion-proof housing and the explosion-proof pressure relief pipe is changed. A burst pressure relief valve is installed above the explosion-proof pressure relief pipe.
[0010] Preferably, the rupture relief valve includes a connecting pipe bolted to the explosion-proof relief pipe, and a jacket is fixed between the connecting pipe and the explosion-proof relief pipe, with a rupture disc clamped inside the jacket.
[0011] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. The explosion-proof cover and sliding pressure relief mechanism of this utility model, when the electromagnetic control module adjusts the pipeline flow, and when a chemical medium between the electromagnetic control module and the explosion-proof cover is ignited by an electric spark and an explosion occurs, the high-pressure gas from the explosion impacts the sliding pressure relief mechanism, causing the sliding pressure relief mechanism to move to the outer chamber side, increasing the volume of the inner chamber, thereby reducing the impact of the explosion on the inner wall of the explosion-proof cover. In this way, the sealing joint between the explosion-proof cover shell and other mechanisms can maintain its original fit, allowing the mating mechanism to maintain its original performance and extending the service life of the explosion-proof cover.
[0012] 2. The sliding pressure relief mechanism and explosion relief valve of this utility model, when the valve body and valve core have good sealing performance, result in a small amount of chemical medium between the electromagnetic control module and the explosion-proof cover. When this medium is ignited and an explosion occurs, the energy is limited. The sliding pressure relief mechanism provides elastic buffering to relieve pressure, which firstly protects the fit and sealing performance of the other port fitting mechanisms and seals of the explosion-proof cover, and secondly, allows for continuous explosion-proof operation through self-reset, reducing personnel maintenance. When there is a certain amount of chemical medium leakage between the electromagnetic control module and the explosion-proof cover, the pressure generated by the explosion exceeds the explosion-proof cover's tolerance limit. The sliding pressure relief mechanism is instantly pushed to the outer chamber side, connecting the inner chamber with the explosion relief valve, thereby releasing the high-pressure gas of the explosion through explosion relief to protect the explosion-proof cover from rupture and secondary damage. Attached Figure Description
[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0014] Figure 1 This is a schematic diagram of the overall structure of an explosion-proof temperature control valve for a chemical product production line as described in this utility model; Figure 2 This is a top view of an explosion-proof temperature control valve for a chemical product production line as described in this utility model; Figure 3 This is a utility model Figure 2 A sectional view along the middle AA; Figure 4 This is a utility model Figure 3 A magnified view of area A in the middle; Figure 5 This is a partial cross-sectional view of the explosion-proof cover described in this utility model; Figure 6 This is a utility model Figure 5 A magnified view of area B in the middle; Figure 7 This is an exploded view of the explosion-proof cover described in this utility model; The annotations in the attached figures are explained as follows: 1. Valve body; 2. Valve core; 3. Control rod; 4. Electromagnetic control module; 5. Explosion-proof cover; 6. Sliding pressure relief mechanism; 7. Explosion-proof pressure relief valve; 41. Drive module; 42. Sealing wiring pipe; 43. Fixed cable tray; 51. Explosion-proof shell; 52. Fixed partition; 53. Bottom sealing plate; 54. Limiting top cover; 55. Pressure relief sealing plate; 56. Flame-retardant limiting ring; 57. Quenching mesh; 58. Explosion-proof pressure relief pipe; 61. Sliding piston rod; 62. Pressure relief plate; 63. Sealing sliding sleeve; 64. Limiting sleeve; 65. Buffer spring; 71. Jacket; 72. Rupture disc; 73. Connecting pipe. Detailed Implementation
[0015] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.
[0016] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0017] The present invention will be further described below with reference to the accompanying drawings: like Figures 1-7 As shown, an explosion-proof temperature control valve for a chemical product production line includes a valve body 1 and a valve core 2. An electromagnetic control module 4 is mounted above the valve core 2, and a control rod 3 is connected between the electromagnetic control module 4 and the valve core 2. The electromagnetic control module 4 drives the control rod 3, which in turn moves the closing mechanism of the valve core 2 to regulate the flow rate. An explosion-proof cover 5 is provided outside the electromagnetic control module 4. The explosion-proof cover 5... Figure 1 , Figure 7As shown, an explosion-proof cover 5 encloses the electromagnetic control module 4, isolating and protecting it from explosion. A sliding pressure relief mechanism 6 is slidably fitted inside the explosion-proof cover 5. The explosion-proof cover 5 has multiple openings, which cooperate with other mechanisms for sealing. The sliding pressure relief mechanism 6 is slidably fitted at one of these openings, dividing the interior of the explosion-proof cover 5 into inner and outer chambers. The chamber containing the electromagnetic control module 4 is the inner chamber, and the other side separated by the sliding pressure relief mechanism 6 is the outer chamber. When the electromagnetic control module 4 is operating, if an electric spark ignites a flammable chemical medium, causing an explosion and a sudden increase in pressure in the inner chamber, the sliding pressure relief mechanism 6 will slide towards the outer chamber, expanding the volume of the inner chamber and reducing the impact of the explosion on the explosion-proof cover 5. A quenching mesh 57 is located on the side of the sliding pressure relief mechanism 6 closest to the inner chamber. The quenching mesh 57 blocks the flame from flowing out of the inner chamber. The quenching mesh 57 is fixedly installed. The sliding pressure relief mechanism 6 increases the volume of the inner chamber by moving, thus relieving pressure during an explosion.
[0018] In actual operation, when the electromagnetic control module 4 is performing regulation operations, the electrical components, the electric sparks generated during operation, and the high temperatures generated by the friction of mechanical parts all pose a risk of igniting the flammable and explosive chemical medium between the electromagnetic control module 4 and the explosion-proof cover 5. The explosion-proof cover 5 is a risk prevention device. The amount of chemical medium between the electromagnetic control module 4 and the explosion-proof cover 5 depends on the sealing performance of the temperature control valve. Therefore, unless the temperature control valve leaks severely, even if the chemical medium between the electromagnetic control module 4 and the explosion-proof cover 5 is ignited, its explosive energy is limited. The explosion-proof cover 5 mainly serves to isolate the external space and prevent the flammable and explosive media in the external space from being ignited and causing an accident. When a small-energy explosion occurs between the electromagnetic control module 4 and the explosion-proof cover 5, the explosion shock wave passes through the quenching mesh 57, isolating the flame. The high-pressure gas from the explosion impacts the sliding pressure relief mechanism 6, causing it to move towards the outer chamber, increasing the volume of the inner chamber and thus reducing the impact of the explosion on the inner wall of the explosion-proof cover 5. Then, under the elastic force of the elastic support structure within the sliding pressure relief mechanism 6, it slowly returns to its original position. In this way, the sealing joints between the explosion-proof cover 5 and other mechanisms maintain their original fit, ensuring the mating mechanisms retain their original performance settings and extending the service life of the explosion-proof cover 5.
[0019] In this embodiment: the explosion-proof cover 5 includes an explosion-proof shell 51, which has a cross-shaped structure and four ports. A bottom sealing plate 53 is fixed to the lower port of the explosion-proof shell 51, and the control rod 3 is fixed to the explosion-proof shell 51 via the bottom sealing plate 53. A limiting top cover 54 is fixed to the upper port of the explosion-proof shell 51, which is used to fix the electromagnetic control module 4. Explosion-proof sealing plates are fixedly installed at the mating points of the limiting top cover 54, the bottom sealing plate 53, and the explosion-proof shell 51. The explosion-proof sealing plates are located at the ports of the explosion-proof shell 51 to mitigate the impact of an explosion on the limiting top cover 54 and the bottom sealing plate 53. A pressure relief sealing plate 55 is provided at one lateral end of the explosion-proof shell 51, which cooperates with the sliding pressure relief mechanism 6. The sliding sealing structure of the sliding pressure relief mechanism 6 is fixedly connected to the pressure relief sealing plate 55. A fixed partition 52 is provided at the end of the explosion-proof shell 51 away from the sliding pressure relief mechanism 6, and the outer side of the fixed partition 52 is a wiring terminal. The fixed partition 52 is welded to the inner wall of the explosion-proof housing 51 as a whole. The fixed partition 52 and the electromagnetic control module 4 are a mating mechanism. The wiring terminals of the electromagnetic control module 4 are in close contact with the fixed partition 52. The fixed partition 52 has an opening for wiring connection of the electromagnetic control module 4, and the opening is in close contact with the electromagnetic control module 4 for sealing. The explosion-proof housing 51 and the sliding pressure relief mechanism 6 are mating ends and the inner wall are fixed with flame-retardant limiting rings 56 for installing quenching mesh 57. The flame-retardant limiting rings 56 are welded to the explosion-proof housing 51 as a whole. The multi-layer quenching mesh 57 is fixedly connected to the flame-retardant limiting rings 56 by bolts.
[0020] In this embodiment: the sliding pressure relief mechanism 6 includes a sealing sleeve 63 embedded in the center of the pressure relief sealing plate 55. The sealing sleeve 63 is fixedly bonded to the pressure relief sealing plate 55. A sliding piston rod 61 is slidably fitted inside the sealing sleeve 63. A pressure relief plate 62 is fixed on the sliding piston rod 61 and slidably fitted with the inner cavity of the explosion-proof shell 51. The pressure relief plate 62 is slidably fitted with the inner wall of one port of the explosion-proof shell 51. A buffer spring 65 is provided between the pressure relief plate 62 and the pressure relief sealing plate 55. The buffer spring 65 is sleeved on the sliding piston rod 61. A limiting sleeve 64 is screwed onto the outer wall of one end of the sliding piston rod 61 that passes through the pressure relief sealing plate 55. The position of the sliding piston rod 61 and the pressure relief plate 62 is adjusted by adjusting the limiting sleeve 64. At the same time, the compression length of the buffer spring 65 is limited by the limiting sleeve 64.
[0021] In practice, by strengthening the connection between the pressure relief sealing plate 55 and the explosion-proof housing 51, when an explosion occurs in the inner chamber of the explosion-proof housing 51, the explosion causes the air in the inner chamber to expand instantaneously, thereby pushing the pressure relief plate 62 and causing the sliding piston rod 61 to move towards the outer chamber. The buffer spring 65 is compressed to buffer the explosion impact, thereby protecting the sealing structure of the remaining ports and inner wall of the explosion-proof housing 51. Then, under the action of the buffer spring 65, the pressure relief plate 62 and the sliding piston rod 61 are reset.
[0022] In this embodiment: the electromagnetic control module 4 includes a drive module 41 fitted inside the explosion-proof housing 51. The lower end of the drive module 41 is connected to the control rod 3, and the upper end of the drive module 41 is fixed to the limiting top cover 54. The drive module 41 is fixed to the pipeline through the control rod 3. The limiting top cover 54 and the bottom sealing plate 53 first limit and fix the relative position of the explosion-proof cover 5 and the drive module 41 to remain fixed. One end of the drive module 41 is fixedly connected to a sealing wiring pipe 42. The sealing wiring pipe 42 passes through the fixed partition 52. A sleeve for sealing is fixed between the outer wall of the sealing wiring pipe 42 and the fixed partition 52. The explosion-proof housing 51 has a fixed wire groove 43 for wiring sealing embedded at the corresponding position of the sealing wiring pipe 42. The sleeve and the sealing wiring pipe 42 are fixedly connected to the fixed partition 52 to isolate the inner cavity of the explosion-proof housing 51. The fixed wire groove 43 is snapped into the port of the explosion-proof housing 51, which is a detachable wiring port for wiring connection.
[0023] In this embodiment: a pressure relief hole is provided at the mating point between the explosion-proof housing 51 and the sliding pressure relief mechanism 6. An explosion-proof pressure relief pipe 58 is fixed at the pressure relief hole. The explosion-proof pressure relief pipe 58 is welded to the explosion-proof housing 51 as a whole. The pressure relief plate 62 and the explosion-proof pressure relief pipe 58 are mating mechanisms. By displacing the pressure relief plate 62, the communication state between the inner cavity of the explosion-proof housing 51 and the explosion-proof pressure relief pipe 58 is changed. Under normal conditions, the pressure relief plate 62 is located on the side of the explosion-proof pressure relief pipe 58 away from the outer cavity. At this time, the explosion-proof pressure relief pipe 58 is connected to the outer cavity. As the pressure relief plate 62 moves from one side of the outer cavity to the other side of the explosion-proof pressure relief pipe 58, the explosion-proof pressure relief pipe 58 gradually connects to the inner cavity. A burst pressure relief valve 7 is installed above the explosion-proof pressure relief pipe 58. The burst pressure relief valve 7 includes a connecting pipe 73 bolted to the explosion-proof pressure relief pipe 58, such as... Figure 7 As shown, the connecting pipe 73 and the explosion-proof pressure relief pipe 58 are fixed together by multiple adjusting bolts. A jacket 71 is fixed between the connecting pipe 73 and the explosion-proof pressure relief pipe 58. The jacket 71 is divided into upper and lower layers. The upper layer is clamped to the connecting pipe 73, and the lower layer is clamped to the explosion-proof pressure relief pipe 58. The jacket 71 holds a rupture disc 72. When there is a large amount of chemical medium in the inner chamber, if the pressure generated by the explosion exceeds the tolerance limit of the explosion-proof cover 5, the rupture disc 72 will rupture to relieve pressure, so as to protect the explosion-proof cover 5 from rupture and secondary damage.
[0024] In specific operations, if there is a leak of flammable and explosive chemical media between the electromagnetic control module 4 and the explosion-proof cover 5, the resulting explosion will have significant energy. The high pressure generated by the explosion will exceed the pressure resistance limit of the explosion-proof cover 5 and its port. At this time, the pressure relief plate 62 will be instantly pushed towards the pressure relief sealing plate 55, and the explosion-proof pressure relief pipe 58 will be connected to the inner chamber. High-pressure gas will rush into the rupture pressure relief valve 7 through the explosion-proof pressure relief pipe 58. The rupture disc 72 will burst upward under the impact of the high-pressure gas, thereby connecting the inner chamber of the explosion-proof cover 5 with the pressure relief pipeline for pressure relief. After an explosion occurs, the operator needs to perform maintenance on the temperature control valve and replace the rupture disc 72. After the inspection is completed, normal operation can be resumed.
[0025] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.
Claims
1. An explosion-proof temperature control valve for a chemical product production line, comprising a valve body (1) and a valve core (2), wherein an electromagnetic control module (4) is provided above the valve core (2), a control rod (3) is connected between the electromagnetic control module (4) and the valve core (2), and an explosion-proof cover (5) is provided on the outside of the electromagnetic control module (4), characterized in that: The explosion-proof cover (5) is equipped with a sliding pressure relief mechanism (6). The sliding pressure relief mechanism (6) divides the interior of the explosion-proof cover (5) into inner and outer chambers. The sliding pressure relief mechanism (6) has a quenching net (57) on the side near the inner chamber. The quenching net (57) blocks the flame from flowing out of the inner chamber. The sliding pressure relief mechanism (6) increases the volume of the inner chamber by moving to relieve the pressure of the explosion.
2. The explosion-proof temperature control valve for a chemical product production line according to claim 1, characterized in that: The explosion-proof cover (5) includes an explosion-proof shell (51), which has a cross-shaped structure. A bottom sealing plate (53) is fixed at the lower end of the explosion-proof shell (51). The control rod (3) is fixed to the explosion-proof shell (51) through the bottom sealing plate (53). A limit top cover (54) is fixed at the upper end of the explosion-proof shell (51). The limit top cover (54) is used to fix the electromagnetic control module (4). One end of the explosion-proof shell (51) is provided with a pressure relief sealing plate (55) that cooperates with the sliding pressure relief mechanism (6), and the other end is provided with a fixed partition (52). The fixed partition (52) and the electromagnetic control module (4) are a cooperating mechanism. The inner wall of the explosion-proof shell (51) and the sliding pressure relief mechanism (6) are fixed with a flame-retardant limit ring (56) for installing the quenching net (57).
3. The explosion-proof temperature control valve for a chemical product production line according to claim 2, characterized in that: The sliding pressure relief mechanism (6) includes a sealing sleeve (63) embedded in the center of the pressure relief sealing plate (55), a sliding piston rod (61) is slidably fitted inside the sealing sleeve (63), a pressure relief plate (62) is fixed on the sliding piston rod (61) and slidably fitted with the inner cavity of the explosion-proof shell (51), a buffer spring (65) is provided between the pressure relief plate (62) and the pressure relief sealing plate (55), and a limit sleeve (64) is screwed onto the outer wall of one end of the sliding piston rod (61) that passes through the pressure relief sealing plate (55).
4. The explosion-proof temperature control valve for a chemical product production line according to claim 2, characterized in that: The electromagnetic control module (4) includes a drive module (41) fitted inside the explosion-proof housing (51). The lower end of the drive module (41) is connected to the control rod (3), and the upper end of the drive module (41) is fixed to the limit top cover (54). One end of the drive module (41) is fixedly connected to a sealing wiring pipe (42). The sealing wiring pipe (42) passes through the fixed partition (52). Between the outer wall of the sealing wiring pipe (42) and the fixed partition (52), a sleeve for sealing is fixed. The explosion-proof housing (51) has a fixed wire groove (43) for wiring sealing embedded at the location corresponding to the sealing wiring pipe (42).
5. The explosion-proof temperature control valve for a chemical product production line according to claim 3, characterized in that: A pressure relief hole is provided at the joint between the explosion-proof housing (51) and the sliding pressure relief mechanism (6). An explosion-proof pressure relief pipe (58) is fixed at the pressure relief hole. The pressure relief plate (62) and the explosion-proof pressure relief pipe (58) are a joint mechanism. The communication state between the inner cavity of the explosion-proof housing (51) and the explosion-proof pressure relief pipe (58) is changed by the displacement of the pressure relief plate (62). A burst pressure relief valve (7) is installed above the explosion-proof pressure relief pipe (58).
6. The explosion-proof temperature control valve for a chemical product production line according to claim 5, characterized in that: The rupture relief valve (7) includes a connecting pipe (73) bolted to the explosion-proof relief pipe (58), and a jacket (71) is fixed between the connecting pipe (73) and the explosion-proof relief pipe (58), and a rupture disc (72) is held inside the jacket (71).
7. The explosion-proof temperature control valve for a chemical product production line according to claim 2, characterized in that: The limiting top cover (54), the bottom sealing plate (53), and the explosion-proof shell (51) are all fixedly installed with explosion-proof sealing plates.