Ethylene oxide metering tank

Abstract

The utility model relates to the technical field of metering tanks, in particular to an ethylene oxide metering tank which comprises a tank body assembly, a tank body cooling mechanism arranged outside the tank body assembly and a tank cavity constant pressure mechanism arranged in the tank body assembly. The tank body assembly comprises a metering tank and a sealing cover arranged at the top end of the metering tank. The tank cavity constant-pressure mechanism for dynamically balancing the pressure after ethylene oxide polymerization is arranged in the metering tank, the tank cavity constant-pressure mechanism can enlarge the capacity of an inner cavity of the metering tank at the moment that the pressure in the metering tank is increased due to the temperature and polymer blockage problem so as to relieve the pressure intensity borne by the tank body, and meanwhile, the tank cavity constant-pressure mechanism can also enlarge the capacity of the inner cavity of the metering tank. When the tank cavity constant-pressure mechanism adjusts the pressure, the cooling liquid in the U-shaped groove outside the metering tank is pressed upwards until the cooling liquid cools and controls the temperature of the heating part of the upper half section of the tank body.

Description

Technical Field

[0001] The utility model relates to the technical field of metering tanks, and specifically relates to an ethylene oxide metering tank. Background Technique

[0002] The ethylene oxide metering tank is a common flow metering device, mainly used for measuring and controlling the flow rate of ethylene oxide. Its structure mainly includes components such as a metering tank, a pressure sensor, a temperature sensor, and a flow meter. Through the monitoring and calculation of the flow rate, the accurate control of the ethylene oxide flow rate is achieved.

[0003] At present, there are still certain defects in the actual use of the ethylene oxide metering tank. With the influence of aldehyde impurities in ethylene oxide, at low temperatures, the self-polymerization rate of ethylene oxide gradually slows down and polymers are formed, thereby blocking the pipelines inside the metering tank. Until the temperature reaches a certain level, the polymerization rate of ethylene oxide will accelerate and a large amount of heat energy will be generated, and there is a risk of explosion under the interference of the blockage.

[0004] In view of this, an ethylene oxide metering tank is designed to solve the above problems. Content of the Utility Model

[0005] The utility model aims to solve one of the technical problems existing in the prior art or related technologies.

[0006] For this reason, the technical solution adopted by the utility model is as follows:

[0007] An ethylene oxide metering tank, including a tank body assembly, a tank body cooling mechanism arranged outside the tank body assembly, and a constant pressure mechanism for the tank cavity arranged inside the tank body assembly; the tank body assembly includes a metering tank and a cover arranged at the top of the metering tank; the constant pressure mechanism for the tank cavity includes a base arranged at the bottom of the inner cavity of the metering tank, a limiting rod installed inside the base, a squeezing plug head movably installed inside the base, a spring arranged between the squeezing plug head and the base, a column head arranged outside the limiting rod, a compression-resistant cushion plate installed at the top of the column head, and a protective outer pad installed outside the compression-resistant cushion plate, and the protective outer pad is adapted to fit closely to the inner wall of the metering tank.

[0008] In a preferred example of the utility model, it can be further configured as: the tank body cooling mechanism includes a base installed at the bottom of the metering tank, a liquid storage outer pipe installed outside the metering tank, a ring pad movably installed inside the liquid storage outer pipe, and a diversion pipe installed between the base and the liquid storage outer pipe.

[0009] In a preferred example of the utility model, it can be further configured as: the tank body cooling mechanism further includes a head fixed at the bottom end of the inner cavity of the diversion pipe, a guide rod movably installed inside the head, a plug head installed at the other end of the guide rod, an anti-seepage gasket ring fixed on the inner wall of the diversion pipe, and a tension spring installed at the inner end of the head and pressing on the anti-seepage gasket ring.

[0010] In a preferred embodiment of the present utility model, it can be further configured that: the constant pressure mechanism of the tank cavity further includes a reinforcing end head fixedly installed on the top of the compression cushion plate, and the reinforcing end head is integrally in a frustum shape structure.

[0011] In a preferred embodiment of the present utility model, it can be further configured that: the limiting rod is integrally in a T-shaped structure, and a cylindrical cavity is opened inside the bottom end of the limiting rod;

[0012] Two symmetrically distributed air ports are opened on both side walls at the bottom of the limiting rod, and the two air ports communicate with the cylindrical cavity.

[0013] In a preferred embodiment of the present utility model, it can be further configured that: the constant pressure mechanism of the tank cavity further includes a sealing ring;

[0014] The extrusion plug head is integrally in an I-shaped structure, and an annular notch is opened at the end of the extrusion plug head penetrating into the inner cavity of the base, and the sealing ring is installed in the annular notch.

[0015] In a preferred embodiment of the present utility model, it can be further configured that: annular cutting edges are opened at both the top and the bottom of the protective outer pad.

[0016] By adopting the above technical solutions, the beneficial effects obtained by the present utility model are as follows:

[0017] 1. By arranging the constant pressure mechanism of the tank cavity for dynamically balancing the pressure after the polymerization of ethylene oxide inside the metering tank, when the pressure inside the metering tank increases suddenly due to temperature and polymer blockage problems, the constant pressure mechanism of the tank cavity will expand the inner cavity capacity of the metering tank to relieve the pressure borne by the tank body. At the same time, during the pressure regulation by the constant pressure mechanism of the tank cavity, the coolant in the U-shaped groove outside the metering tank will also be pressured upward until the coolant cools and controls the temperature of the upper half of the tank body where the temperature rises. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic diagram when the present utility model is in use;

[0019] Figure 2 is a schematic diagram of the tank body assembly of the present utility model;

[0020] Figure 3 is a schematic diagram of the tank body cooling mechanism of the present utility model;

[0021] Figure 4 is of the present utility model Figure 3 the enlarged schematic diagram at A in;

[0022] Figure 5 is a schematic diagram of the constant pressure mechanism of the tank cavity of the present utility model;

[0023] Figure 6 Schematic cross-sectional view of the present utility model Figure 5 ;

[0024] Figure 7 Schematic explosion view of the present utility model Figure 6 ;

[0025] Reference numerals:

[0026] 100, tank assembly; 110, metering tank; 120, cover

[0027] 200, tank body cooling mechanism; 210, liquid storage outer pipe; 220, ring gasket; 230, diversion pipe; 240, base; 250, end head; 260, guide rod; 270, plug head; 280, tension spring; 290, anti-seepage gasket ring

[0028] 300, constant pressure mechanism for tank cavity; 310, base; 320, limit rod; 330, air port; 340, extrusion plug head; 3401, sealing ring; 350, spring; 360, column head; 370, compression resistant gasket plate; 380, reinforced end head; 390, protective outer gasket Detailed implementation manners

[0029] To make the objectives, technical solutions and advantages of the present utility model clearer and more understandable, the present utility model will be further described in detail below in combination with the detailed implementation manners and with reference to the accompanying drawings. It should be noted that, without conflict, the embodiments of the present utility model and the features in the embodiments can be combined with each other

[0030] It should be understood that these descriptions are only exemplary and are not intended to limit the scope of the present utility model

[0031] The following describes an ethylene oxide metering tank provided by some embodiments of the present utility model in combination with the accompanying drawings

[0032] Embodiment 1: As shown in Figures 1 to 7 , an ethylene oxide metering tank provided by the present utility model includes a tank body assembly 100, a tank body cooling mechanism 200 disposed outside the tank body assembly 100, and a constant pressure mechanism 300 for the tank cavity disposed inside the tank body assembly 100. The tank body assembly 100 is used for metering ethylene oxide, the tank body cooling mechanism 200 is used for cooling the upper half of the tank body assembly 100 after temperature rise, and the constant pressure mechanism 300 for the tank cavity is used for balancing the pressure inside the tank body assembly 100

[0033] The tank body assembly 100 includes a metering tank 110 and a cover 120 disposed at the top of the metering tank 110

[0034] The constant-pressure mechanism 300 for the tank cavity includes a sealing ring 3401, a base 310 disposed at the bottom of the inner cavity of the metering tank 110, a limiting rod 320 installed inside the base 310, a pressing plug 340 movably installed inside the base 310, a spring 350 disposed between the pressing plug 340 and the base 310, a stud 360 disposed outside the limiting rod 320, a compressive pad plate 370 installed on the top of the stud 360, and a protective outer pad 390 installed outside the compressive pad plate 370, and the protective outer pad 390 is adapted to fit closely to the inner wall of the metering tank 110;

[0035] The pressing plug 340 is integrally in an I-shaped structure, and an annular notch is formed in the end of the pressing plug 340 penetrating into the inner cavity of the base 310, and the sealing ring 3401 is installed in the annular notch.

[0036] When the pressure in the inner cavity of the metering tank 110 changes due to temperature change, as the pressure in the inner cavity of the metering tank 110 gradually increases, the compressive pad plate 370 and the protective outer pad 390 will be pressed down, and after the compressive pad plate 370 and the protective outer pad 390 drop, the actual capacity of the inner cavity of the metering tank 110 will be enlarged, thereby reducing the actual bearing strength of the metering tank 110;

[0037] While the compressive pad plate 370 and the protective outer pad 390 are dropping, the spring 350 will also be compressed, and the pressing plug 340 will also compress the volume of the inner cavity of the base 310. Eventually, the air in the inner cavity of the base 310 will be effectively transferred, and finally it can be ensured that the sudden pressure increase in the inner cavity of the metering tank 110 is automatically balanced.

[0038] Embodiment 2: In combination with Figures 1 to 4 As shown, on the basis of Embodiment 1, the tank body cooling mechanism 200 includes a base 240 installed at the bottom of the metering tank 110, a liquid storage outer pipe 210 installed outside the metering tank 110, a ring pad 220 movably installed inside the liquid storage outer pipe 210, a diversion pipe 230 installed between the base 240 and the liquid storage outer pipe 210, a head 250 fixedly installed at the bottom end of the inner cavity of the diversion pipe 230, a guide rod 260 movably installed inside the head 250, a plug 270 installed at the other end of the guide rod 260, an anti-seepage pad ring 290 fixedly installed on the inner wall of the diversion pipe 230, and a tension spring 280 installed at the inner end of the head 250 and bearing on the anti-seepage pad ring 290.

[0039] Preferably, six evenly distributed studs are provided on the top of the base 240, and nuts are provided on the studs, and the nuts are used to lock and fix the bottom end of the metering tank 110, and the pipe on the top of the base 240 is adapted to penetrate into the inside of the limiting rod 320;

[0040] After the air in the inner cavity of the base 310 is compressed, it will eventually be transferred to the inside of the base 240. Then, the pressurized air inside the base 240 will be transferred from the diversion pipe 230 to the U-shaped groove formed by the liquid storage outer pipe 210, the metering tank 110, and the ring gasket 220. As the ring gasket 220 is continuously pushed upward, the coolant in the U-shaped groove will eventually submerge and cool the upper heated part of the metering tank 110.

[0041] Embodiment 3: Combining Figures 2 to 7 As shown, in the above embodiment, the tank cavity constant pressure mechanism 300 further includes a reinforcing end 380 fixedly installed on the top of the anti-pressure cushion plate 370, and the reinforcing end 380 is integrally in a frustum shape;

[0042] The limiting rod 320 is integrally in a T shape, and a cylindrical cavity is opened inside the bottom end of the limiting rod 320;

[0043] Two symmetrically distributed air ports 330 are opened on the two side walls at the bottom of the limiting rod 320, and the two air ports 330 communicate with the cylindrical cavity;

[0044] Ring-shaped knife edges are opened at both the top and bottom of the protective outer pad 390.

[0045] Preferably, the annular groove formed by the reinforcing end 380 and the upper half of the protective outer pad 390 can store polymers or impurities inside the metering tank 110. Along with the lifting movement of the protective outer pad 390 along the inner wall of the metering tank 110, the ring-shaped knife edges at the top and bottom of the protective outer pad 390 can finally remove the impurities and dirt adhering to the inner wall of the metering tank 110, and the contact surface between the inner wall of the metering tank 110 and the protective outer pad 390 will be closer after cleaning.

[0046] The working principle and usage process of the present utility model: First, the whole tank body assembly 100 is arranged inside the cofferdam. Then, the coolant is filled into the U-shaped groove formed by the liquid storage outer pipe 210, the ring gasket 220, and the metering tank 110. When the pressure inside the metering tank 110 is constant, the spring 350 will apply an outward extending thrust to the extrusion plug 340. At this time, the anti-pressure cushion plate 370 and the protective outer pad 390 will be located in the middle of the inner cavity of the metering tank 110;

[0047] When there is a problem of excessive aldehyde impurities during the storage of ethylene oxide in the tank assembly 100, as the internal pressure of the tank assembly 100 gradually increases, the enhanced end 380 and the protective outer pad 390 will first balance the internal pressure of the metering tank 110. As the compression pad plate 370 and the protective outer pad 390 continue to descend, the pushed-down extrusion plug 340 cooperating with the sealing ring 3401 will compress the air in the inner cavity of the base 310 until the compressed gas in the inner cavity of the base 310 enters the cavity inside the limiting rod 320 along the air port 330, and then the gas entering the inner cavity of the base 310 will enter the diversion pipe 230 along the base 240. As the internal pressure of the base 240 gradually increases, the plug 270 will eventually be pushed outwards, and then the air will enter the U-shaped groove along the gap between the plug 270 and the anti-seepage gasket ring 290;

[0048] As the air pressure pushes the inner ring pad 220 in the U-shaped groove upwards, the coolant in the U-shaped groove will eventually submerge the upper half of the metering tank 110 until the upper half of the metering tank 110 is exposed and the heated part is cooled.

[0049] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and purposes of the present invention. The scope of the present invention is defined by the claims and their equivalents.

Claims

1. An ethylene oxide metering tank, comprising a tank assembly (100), characterized in that: It also includes a tank body cooling mechanism (200) arranged outside the tank body assembly (100) and a tank cavity constant pressure mechanism (300) arranged inside the tank body assembly (100); The tank assembly (100) comprises a metering tank (110) and a cover (120) arranged at the top of the metering tank (110); The tank cavity constant pressure mechanism (300) comprises a base (310) arranged at the bottom of the inner cavity of the metering tank (110), a limit rod (320) installed inside the base (310), an extrusion plug (340) movably installed inside the base (310), a spring (350) arranged between the extrusion plug (340) and the base (310), a column head (360) arranged outside the limit rod (320), a pressure-resistant pad (370) installed on the top of the column head (360), and a protective outer pad (390) installed outside the pressure-resistant pad (370), wherein the protective outer pad (390) is adapted to fit the inner wall of the metering tank (110).

2. An ethylene oxide metering tank according to claim 1, characterized in that: The tank cooling mechanism (200) comprises a base (240) mounted on the bottom of the metering tank (110), a liquid storage outer tube (210) mounted outside the metering tank (110), a ring gasket (220) movably mounted on the inner side of the liquid storage outer tube (210), and a flow guide tube (230) mounted between the base (240) and the liquid storage outer tube (210).

3. An ethylene oxide metering tank according to claim 2, characterized in that: The tank cooling mechanism (200) further comprises an end cap (250) fixedly mounted at the bottom end of the inner cavity of the flow guide tube (230), a guide rod (260) movably mounted inside the end cap (250), a plug (270) mounted at the other end of the guide rod (260), an anti-seepage gasket (290) fixedly mounted on the inner wall of the flow guide tube (230), and a tension spring (280) mounted at the inner end of the end cap (250) and bearing pressure on the anti-seepage gasket (290).

4. An ethylene oxide metering tank according to claim 1, characterized in that: The tank cavity constant pressure mechanism (300) further comprises a reinforced end head (380) fixedly mounted on the top of the pressure-resistant pad (370), and the reinforced end head (380) is in a truncated cone-shaped structure as a whole.

5. The ethylene oxide metering tank according to claim 1, characterized in that: The limiting rod (320) is in a T-shaped structure as a whole, and a cylindrical cavity is provided inside the bottom end of the limiting rod (320); Two symmetrically distributed air ports (330) are provided on two side walls at the bottom of the limiting rod (320), and the two air ports (330) are connected to the cylindrical cavity.

6. An ethylene oxide metering tank according to claim 1, characterized in that: The tank cavity constant pressure mechanism (300) further includes a sealing ring (3401); The extrusion plug (340) is in an I-shaped structure as a whole, and a circular notch is provided on the end of the extrusion plug (340) that penetrates into the inner cavity of the base (310), and the sealing ring (3401) is installed in the circular notch.

7. An ethylene oxide metering tank according to claim 1, characterized in that: The top and bottom of the protective outer pad (390) are both provided with an annular cutting edge.

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