Steam blow-down valve structure

Abstract

The utility model discloses a steam blow-down valve structure, which relates to the technical field of steam blow-down valves and comprises a valve body, a valve cavity is arranged in the valve body, the bottom and one side of the valve cavity are respectively provided with a steam pipeline, a valve clack is slidably connected in the valve cavity, the top end of the valve clack is fixedly connected with a valve rod, and the valve rod is fixedly connected with the valve rod. According to the steam blow-down valve structure, by arranging the lifting sleeve and the valve rod, the cavity opening in the bottom of the valve cavity is blocked by the valve clack in the mode that the lifting sleeve extrudes the valve rod, starting and stopping of the steam blow-down valve are completed, when blow-down or exhaust needs to be carried out, the height of the lifting sleeve can be finely adjusted, and therefore the valve rod can be opened and closed. When the pressure is increased, the valve clack can be automatically opened and closed without using driving equipment such as an actuator, so that the energy consumption of the steam purging valve can be effectively reduced, the service life of the actuator used by the steam purging valve is prolonged, and the practicability of the steam purging valve is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a steam purging valve technical field, specifically a steam purging valve structure. BACKGROUND

[0002] Steam purging valve is the key control device for steam pipeline purging operation, is mainly used for removing the impurity (such as welding slag, corrosion, etc.) remaining in the pipeline, ensures system operation safety and equipment life. Purging valve needs to cooperate with steam pressure transmitter, detector etc. in the operation process, realizes accurate control.

[0003] At present, steam purging valve mainly utilizes cylinder to control valve clack lifting, adjusts steam purging valve opening and closing by this, this mode needs actuator (cylinder driven equipment) reciprocating operation, therefore will increase the energy consumption of actuator operation, and reduces the service life of actuator, simultaneously, reduces the practicability of steam purging valve. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing a steam purging valve structure to solve the problem of low practicability of the current steam purging valve in the prior art.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a steam purging valve structure, including the valve body, the valve cavity is arranged in the valve body, the valve cavity bottom and one side are all provided with the steam pipeline, the valve cavity is slidably connected with the valve clack, the valve clack top end is fixedly connected with the valve rod, the valve rod outside is slidably sleeved with the lifting sleeve and spring, the spring is located in the inside of lifting sleeve, the valve cavity top is formed with the sliding slot, the lifting sleeve is slidably arranged in the sliding slot cavity, the sliding slot includes the coarse slot, the stroke cavity and the fine slot that are sequentially arranged from top to bottom, the sealing ring is arranged in the fine slot cavity.

[0006] Preferably, the bottom opening of the sliding slot is provided with a sealing ring, and the sealing ring is slidably sleeved on the outer side of the valve rod.

[0007] Preferably, a first blocking ring is fixedly sleeved on the outer side of the valve rod, the first blocking ring is slidably arranged in the sliding slot cavity, and the first blocking ring is in contact with the bottom end of the lifting sleeve, the vertical section of the first blocking ring is arranged in an isosceles trapezoidal shape, and a trapezoidal groove is formed in the bottom of the lifting sleeve and matched with the upper part of the first blocking ring.

[0008] Preferably, a second blocking ring is slidably sleeved on the outer side of the valve rod, and the spring is located between the second blocking ring and the first blocking ring, and the second blocking ring is fixedly connected to the inner wall of the lifting sleeve.

[0009] Preferably, a cylinder is fixedly connected to the top end of the valve body, and the output end of the cylinder is fixedly connected to the top end of the lifting sleeve.

[0010] Preferably, a stroke cavity is formed on the inner wall of the sliding groove, a stroke scale is arranged on the inner wall of the stroke cavity, and a stroke pointer is arranged on the valve rod at a corresponding position of the stroke scale.

[0011] Preferably, flange plates are arranged at both ends of the valve body, and the two flange plates are respectively arranged at the pipe openings of the two steam pipelines.

[0012] Compared with the prior art, the utility model has the beneficial effects that:

[0013] 1、The lifting sleeve and the valve rod are arranged, so that the valve rod is extruded by the lifting sleeve, the valve disc blocks the cavity opening at the bottom of the valve cavity, the start and stop of the steam purging valve are completed, when purging or exhaust is needed, the height of the lifting sleeve is adjusted, the valve rod is pressed down by the spring, the valve disc can be automatically opened and closed when the steam pressure increases, and no driving device such as an actuator is needed, therefore, the energy consumption of the steam purging valve can be effectively reduced, the service life of the actuator used by the steam purging valve is prolonged, and the practicability of the steam purging valve is improved.

[0014] 2、The first blocking ring and the second blocking ring are arranged, so that the stability of the valve disc when blocking is effectively improved when the steam purging valve is closed, therefore, the practicability and stability of the steam purging valve are effectively improved. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a three-dimensional schematic view of the whole structure of the steam purging valve.

[0016] Figure 2 It is a sectional three-dimensional schematic view of the whole closed state of the steam purging valve structure.

[0017] Figure 3 It is a sectional three-dimensional schematic view of the whole open state of the steam purging valve structure.

[0018] Figure 4 It is a sectional three-dimensional schematic view of the cooperation of the valve rod and the lifting sleeve of the steam purging valve structure.

[0019] Reference signs in the drawing: 1, valve body; 2, valve cavity; 3, steam pipeline; 4, valve disc; 5, valve rod; 6, lifting sleeve; 7, spring; 8, sliding groove; 9, sealing ring; 10, first blocking ring; 11, second blocking ring; 12, air cylinder; 13, stroke cavity; 14, stroke scale; 15, stroke pointer; 16, flange plate. DETAILED DESCRIPTION

[0020] Clearly, the described embodiments are merely a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative efforts under the premise that no creative efforts are made, belong to the scope of protection of the present application.

[0021] Embodiment: as shown in the figure, Figure 1 Figure 4 The utility model provides a technical scheme of steam purging valve structure, including valve body 1, be provided with valve cavity 2 in valve body 1, and the bottom and one side of valve cavity 2 are provided with steam pipeline 3, and the valve cavity 2 is slidably connected with valve clack 4, and the top of valve clack 4 is fixedly connected with valve rod 5, and the outer side of valve rod 5 is slidably sleeved with lifting sleeve 6 and spring 7, and spring 7 is located in the inside of lifting sleeve 6, and the top of valve cavity 2 is formed with sliding slot 8, and lifting sleeve 6 is slidably arranged in the cavity of sliding slot 8, and sliding slot 8 includes coarse slot, stroke cavity 13 and fine slot sequentially arranged from top to bottom, and sealing ring 9 is arranged in the cavity of fine slot,

[0022] Steam enters into valve cavity 2 from one side steam pipeline 3, and then is discharged from the steam pipeline 3 of the other side again, by adjusting the descent of lifting sleeve 6, lifting sleeve 6 then presses down valve rod 5, and makes spring 7 completely compressed, then utilizes valve rod 5 to drive valve clack 4 to block the through opening between valve cavity 2 and steam pipeline 3, in this way, valve body 1 is closed, and vice versa, valve body 1 is opened, and valve body 1 is steam purging valve,

[0023] When automatic steam discharge is needed, only the height of lifting sleeve 6 needs to be finely adjusted, so as to push valve clack 4 to block the through opening between valve cavity 2 and steam pipeline 3 by the elastic force of spring 7, at this time, when steam pressure is received, valve clack 4 is pushed to rise and spring 7 is compressed, and steam is discharged, after steam discharge is completed, the through opening between valve cavity 2 and steam pipeline 3 is blocked by valve clack 4 by the elastic force of spring 7.

[0024] As shown in the figure, Figure 2 Figure 3 The bottom opening of the inside of sliding slot 8 is provided with sealing ring 9, and sealing ring 9 is slidably sleeved on the outer side of valve rod 5,

[0025] Sealing ring 9 is used to increase the sealing property between valve rod 5 and sliding slot 8.

[0026] As shown in the figure, Figure 2 Figure 4 The outer side of valve rod 5 is fixedly sleeved with first blocking ring 10, first blocking ring 10 is slidably arranged in the cavity of sliding slot 8, and first blocking ring 10 is in contact with the bottom end of lifting sleeve 6, and the vertical section of first blocking ring 10 is arranged in an isosceles trapezoidal shape, and the bottom of lifting sleeve 6 is provided with trapezoidal groove matched with the upper part of first blocking ring 10.

[0027] ​​​As shown in Figure 2 As shown in Figure 4 The spring 7 is located between the second blocking ring 11 and the first blocking ring 10, and the second blocking ring 11 is fixedly connected to the inner wall of the lifting sleeve 6.

[0028] As shown in Figure 1 As shown in Figure 3 The cylinder 12 is fixedly connected to the top end of the valve body 1, and the output end of the cylinder 12 is fixedly connected to the top end of the lifting sleeve 6.

[0029] As shown in Figure 1 As shown in Figure 3 The travel cavity 13 is formed in the inner wall of the sliding groove 8, the travel scale 14 is arranged on the inner wall of the travel cavity 13, and the travel pointer 15 is arranged at the corresponding position of the travel scale 14.

[0030] As shown in Figure 1 As shown in Figure 3 The flange plates 16 are arranged at both ends of the valve body 1, and the two flange plates 16 are respectively located at the pipe openings of the two steam pipelines 3.

[0031] The PV10251A / B steam purge valve is used to control the purge steam. According to the requirement of the time sequence, the opening and closing frequency of the valve body (1) is about five minutes. At the end of each purge, the valve body (1) is closed, and after 5 minutes of storing steam by the FA-1009 gas storage before the next purge cycle, the valve body (1) is opened. The stored steam is released to the reactor to purge, and after the purge is completed, the valve body (1) is closed again, and the next cycle is waited. Such a cycle is repeated.

[0032] In order to ensure that the reactor is purged thoroughly, the amount of steam purging is required to reach 315 kg or more within one minute, and the timer will quickly enter the next reaction cycle after one minute of purging, so the valve body (1) needs to be able to open and close quickly, otherwise the REASS stop timer will be triggered, affecting the smooth progress of production. The purging pipeline also has a corresponding pressure requirement. Each time the valve body (1) needs to control the pressure at about 1.5 MPa, and the timer will put the valve body (1) controller into an automatic state when performing this step, using PID to control the pressure to maintain the stability of the pipeline pressure. The high sensitivity of the outlet pressure sensor and the characteristics of the fast opening and closing of the valve body (1) will have a little shock in the motion trajectory of the valve body (1), but eventually it will tend to be stable and quickly close, ending the cycle. The valve body (1) has a high requirement for leakage. When the valve body (1) is closed, the leaked steam will increase the pressure in the pipeline, and excessive pressure will cause damage to the pipeline. Therefore, a bypass is provided between PV10251A / b and the reactor, which is controlled by PV10251C. When the pipeline pressure exceeds 0.276 MPa, the valve body (1) is opened to vent the pipeline steam to relieve the pipeline pressure. The more steam leakage, the more steam venting, and the production energy consumption also increases, increasing the operating cost.

[0033] It is obvious for those skilled in the art that the present application is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or essential characteristics of the present application. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting, and the scope of the present application is defined by the appended claims rather than the above description, and therefore all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application. Any reference signs in the claims should not be regarded as limiting the claims.

Claims

1. A steam purge valve structure comprising a valve body (1), characterised in that: The valve body (1) is internally provided with a valve cavity (2), the bottom and one side of the valve cavity (2) are provided with steam pipes (3), the valve cavity (2) is slidably connected with a valve clack (4), the top end of the valve clack (4) is fixedly connected with a valve rod (5), the outer side of the valve rod (5) is slidably sleeved with a lifting sleeve (6) and a spring (7), the spring (7) is located in the interior of the lifting sleeve (6), the top of the valve cavity (2) is formed with a sliding groove (8), and the lifting sleeve (6) is slidably arranged in the cavity of the sliding groove (8).

2. A steam purge valve structure according to claim 1, wherein: The bottom opening of the sliding groove (8) is provided with a sealing ring (9), and the sealing ring (9) is slidably sleeved on the outer side of the valve rod (5).

3. A steam purge valve structure according to claim 2, wherein: The outer side of the valve rod (5) is fixedly sleeved with a first blocking ring (10), the first blocking ring (10) is slidably arranged in the cavity of the sliding groove (8), and the first blocking ring (10) is in contact with the bottom end of the lifting sleeve (6).

4. A steam purge valve structure according to claim 3, wherein: The outer side of the valve rod (5) is slidably sleeved with a second blocking ring (11), the spring (7) is located between the second blocking ring (11) and the first blocking ring (10), and the second blocking ring (11) is fixedly connected to the inner wall of the lifting sleeve (6).

5. The structure of a steam purge valve according to claim 1, wherein: The top end of the valve body (1) is fixedly connected with a cylinder (12), and the output end of the cylinder (12) is fixedly connected with the top end of the lifting sleeve (6).

6. A steam purge valve structure according to claim 5, wherein: The inner wall of the sliding groove (8) is formed with a stroke cavity (13), the inner wall of the stroke cavity (13) is provided with a stroke scale (14), and the valve rod (5) is provided with a stroke pointer (15) at the corresponding position of the stroke scale (14).

7. A steam purge valve structure according to claim 6, wherein: Both ends of the valve body (1) are provided with flange plates (16), and the two flange plates (16) are located at the pipe openings of the two steam pipes (3) respectively.

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