Steam inlet regulation and control structure for steam heater

Abstract

The utility model belongs to the technical field of steam heaters, and particularly discloses a steam inlet regulation and control structure for a steam heater, which is used for solving the technical problems of how to accurately and quickly start an electric heater to serve as a heat source and how to quickly regulate the steam inlet flow when steam does not have a heating condition. Comprising a branch pipe section arranged in the middle of a valve seat, a valve hole is formed in the middle of the valve seat, and the upper end of the branch pipe section is sequentially connected with an adjusting section and a pressure adjusting pipe; whether hot steam in the steam heater can meet the heating condition or not is directly reflected through the steam inlet regulation and control structure, so that instructive actions are performed on whether saturated steam waste heat generated by the steam heater provides normal operation of a molecular sieve system or not, and the problem that the steam amount in the steam heater cannot be regulated is solved; and the amount of introduced steam can be displayed in real time in the steam amount adjusting process by utilizing a pointer matched with the steam inlet adjusting and controlling structure, so that smooth operation of the molecular sieve system is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of steam heaters, in particular to a steam inlet regulating and controlling structure for a steam heater. Background Art

[0002] The steam heater uses steel-aluminum composite finned tubes as the main heat exchanger element. Steam heaters are widely used in air separation equipment, petrochemical industry, food industry, and metallurgical industry. They mainly use the heat released by steam to heat the required process gas. The molecular sieve purification system uses steam heaters to heat the regenerated contaminated nitrogen to produce oxygen, and when the steam does not have the heating conditions, an electric heater must be used to work independently.

[0003] In the actual heating process, the steam flow in the steam heater is compared with the flow of the dirty nitrogen in the steam heater to determine whether the steam volume in the steam heater meets the normal regeneration of the dirty nitrogen. Therefore, the current problem to be solved is: when the steam does not meet the heating conditions, how to accurately and quickly enable the electric heater as a heat source and how to quickly adjust the steam inlet flow;

[0004] In view of the above technical defects, a solution is now proposed. Utility Model Content

[0005] The utility model aims to provide a steam inlet control structure for a steam heater to solve the problems of how to accurately and quickly enable the electric heater to become a heat source and how to quickly adjust the steam inlet flow rate when the steam does not meet the heating conditions.

[0006] The purpose of the utility model can be achieved through the following technical solutions: a steam inlet control structure for a steam heater, comprising a branch pipe section arranged in the middle of a valve seat, a valve hole being opened in the middle of the valve seat, an upper end of the branch pipe section being connected with an adjustment section and a pressure regulating pipe in sequence, a guide shaft being installed inside the branch pipe section and the adjustment section, a valve stem being installed inside the guide shaft extending to the branch pipe section and the valve seat, a valve core matching the valve hole being connected at the bottom end of the valve stem; a diaphragm connected to the guide shaft being installed in the middle of the pressure regulating pipe, a first section of an air intake pipe close to the steam inlet end of the steam heater being penetrated on one side of the lower end of the corresponding diaphragm of the pressure regulating pipe, a tail section of an air intake pipe far away from the steam inlet end of the steam heater being connected to the middle of the upper end of the pressure regulating pipe.

[0007] Preferably, the middle portion of the diaphragm is configured as an arc-shaped ring structure facing upward, the pressure regulating tube is divided into an upper diaphragm cavity and a lower diaphragm cavity by the diaphragm, the tail section air intake pipe is connected to the upper diaphragm cavity, and the head section air intake pipe is connected to the lower diaphragm cavity.

[0008] Preferably, a connecting plate is installed at the middle position of the bottom of the diaphragm, and a pressure-bearing plate aligned with the tail section air intake pipe is installed on the top of the diaphragm corresponding to the connecting plate.

[0009] Preferably, a spring is installed on the outside of the guide shaft, the upper end of the spring is connected to the connecting plate, and the lower end of the spring is connected to the inner bottom end of the connecting section.

[0010] Preferably, the valve stem extends to the outside of the adjustment section and is sleeved with a mounting ring, an indicator needle is laterally connected to the outside of the mounting ring, a scale plate is embedded in the part of the adjustment section corresponding to the indicator needle, and a scale line aligned with the indicator needle is opened on the scale plate.

[0011] Preferably, a sealing plate which is sleeved with the tail section air intake pipe is installed at the middle of the upper end of the pressure regulating pipe, and the sealing plate is an elastic structure and is clamped with the pressure regulating pipe.

[0012] Beneficial effects of the utility model:

[0013] (1) The utility model adjusts the steam inlet flow rate according to the different pressure conditions formed by the steam at different positions in the steam heater through the steam inlet control structure, which directly reflects whether the hot steam in the steam heater can meet the heating conditions, thereby providing guidance on whether the saturated steam waste heat generated by the steam heater can provide the normal operation of the molecular sieve system;

[0014] (2) The pressure introduced into the lower diaphragm cavity in the pressure regulating tube through the first section of the air inlet pipe is greater than the pressure in the upper diaphragm cavity. When the guide shaft drives the valve stem to move downward, the valve stem also drives the indicator needle to move through the mounting ring. The indicator needle can correspond one-to-one with the scale lines on the transparent scale plate. The pressure condition of the diaphragm between the upper diaphragm cavity and the lower diaphragm cavity can be determined based on the indicator needle, thereby determining the amount of steam introduced into the steam heater. That is, in the process of adjusting the amount of steam inside the steam heater, the steam amount inside the steam heater can be clearly displayed in real time through the steam inlet control structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The utility model is further described below in conjunction with the accompanying drawings;

[0016] Figure 1 It is a structural stereogram of the entire utility model;

[0017] Figure 2 It is a cross-sectional structural schematic diagram of the utility model;

[0018] Figure 3 It is a partial structural cutaway schematic diagram of the utility model;

[0019] Figure 4It is a schematic diagram of the installation of the valve core and the valve hole of the utility model.

[0020] Legend: 1. Valve seat; 2. Branch pipe section; 3. Adjustment section; 4. Pressure regulating pipe; 5. First section of air inlet pipe; 6. Tail section of air inlet pipe; 7. Sealing plate; 8. Connecting section; 9. Valve stem; 10. Valve core; 11. Guide shaft; 12. Spring; 13. Connecting plate; 14. Pressure plate; 15. Diaphragm; 16. Scale plate; 17. Scale line; 18. Indicator needle; 19. Mounting ring; 20. Valve hole. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] Embodiment 1: This embodiment is used to solve the problem of how to accurately and quickly enable the electric heater to become a heat source when the steam does not meet the heating conditions and how to quickly adjust the steam inlet flow rate.

[0023] See also Figure 1 - Figure 4 As shown, this embodiment is a steam inlet control structure for a steam heater, comprising a branch pipe section 2 arranged in the middle of a valve seat 1, a valve hole 20 is opened in the middle of the valve seat 1, an upper end of the branch pipe section 2 is connected with an adjustment section 3 and a pressure regulating pipe 4 in sequence, a guide shaft 11 is installed inside the branch pipe section 2 and the adjustment section 3, a valve stem 9 is installed inside the guide shaft 11 extending to the branch pipe section 2 and the valve seat 1, and a valve core 10 matching the valve hole 20 is connected to the bottom end of the valve stem 9; a diaphragm 15 connected to the guide shaft 11 is transversely installed in the middle of the pressure regulating pipe 4, a first section of the air intake pipe 5 close to the steam inlet end of the steam heater is penetrated on one side of the lower end of the corresponding diaphragm 15 of the pressure regulating pipe 4, and a tail section of the air intake pipe 6 far away from the steam inlet end of the steam heater is connected to the middle of the upper end of the pressure regulating pipe 4;

[0024] The middle part of the diaphragm 15 is set to an arc-shaped ring structure facing upward. The pressure regulating pipe 4 is divided into an upper diaphragm cavity and a lower diaphragm cavity by the diaphragm 15. The tail section air intake pipe 6 is connected to the upper diaphragm cavity, and the first section air intake pipe 5 is connected to the lower diaphragm cavity. A connecting plate 13 is installed at the middle position of the bottom of the diaphragm 15. A pressure plate 14 aligned with the tail section air intake pipe 6 is installed on the top of the diaphragm 15 corresponding to the connecting plate 13. When the steam pressure enters the upper diaphragm cavity, it first impacts the pressure plate 14, and the guide shaft 11 is moved by the impact on the pressure plate 14, and finally drives the valve core 10 to complete the opening and closing operation;

[0025] A spring 12 is installed outside the guide shaft 11, the upper end of the spring 12 is connected to the connecting plate 13, and the lower end of the spring 12 is connected to the inner bottom end of the connecting section 8. A sealing plate 7 that is sleeved with the tail section intake pipe 6 is installed in the middle of the upper end of the pressure regulating pipe 4. The sealing plate 7 is an elastic structure and is clamped with the pressure regulating pipe 4.

[0026] See also Figure 1 - Figure 4 As shown, the steam inlet regulating structure is arranged at the steam inlet of the steam heater, and the end of the first section air inlet pipe 5 is located at the end near the steam inlet of the steam heater, and the end of the tail section air inlet pipe 6 is located at the far end of the steam inlet of the steam heater;

[0027] The steam heater normally introduces hot steam and introduces steam through the steam inlet regulating structure. During the operation stage, according to the different pressure conditions formed by the steam entering the steam heater at different positions in the steam heater, when the heat of the hot steam is not enough to provide the heating conditions for the molecular sieve system, the pressure at the steam inlet is significantly greater than the pressure at the far end, that is, the pressure introduced into the lower membrane cavity in the pressure regulating pipe 4 through the first section of the air inlet pipe 5 is greater than the pressure in the upper membrane cavity. At this time, the diaphragm 15 is squeezed and moves upward, and the valve stem 9 is driven to move upward through the guide shaft 11. When the valve core 10 is separated from the valve hole 20, the diaphragm 15 is squeezed and moves upward, and the valve stem 9 is driven to move upward. When the valve core 10 is separated from the valve hole 20, the valve is realized. The entire inlet is in a "fully open" state. When the heat inside the steam heater cannot drive the diaphragm 15 to deform and thus cannot drive the valve core 10 to move, the valve core 10 is sealed to the valve hole 20, that is, it makes a "shutdown" action. At this time, the electric heater is started to ensure the normal operation of the molecular sieve system. In summary: the steam inlet control structure directly reflects whether the hot steam in the steam heater can meet the heating conditions, thereby providing guidance for whether the saturated steam waste heat generated by the steam heater provides the normal operation of the molecular sieve system, and solves the problem of being unable to adjust the amount of steam in the steam heater.

[0028] Embodiment 2: This embodiment is used to solve the problem of how to clearly display the amount of steam inside the steam heater through the steam inlet control structure during the process of adjusting the amount of steam inside the steam heater.

[0029] See also Figure 2 - Figure 3 As shown, a steam inlet control structure for a steam heater in this embodiment includes a valve stem 9 extending to the outside of the regulating section 3 and sleeved with a mounting ring 19, an indicator needle 18 is laterally connected to the outside of the mounting ring 19, a scale plate 16 is embedded in the portion of the regulating section 3 corresponding to the indicator needle 18, and a scale line 17 aligned with the indicator needle 18 is opened on the scale plate 16;

[0030] See also Figure 2 and Figure 3As shown, when the heat of the hot steam is not enough to provide the heating conditions for the molecular sieve system, the pressure at the steam inlet is obviously greater than the pressure at the far end, that is, the pressure introduced into the lower membrane cavity in the pressure regulating tube 4 through the first section of the air inlet pipe 5 is greater than the pressure in the upper membrane cavity. While the guide shaft 11 drives the valve stem 9 to move downward, the valve stem 9 also drives the indicator needle 18 to move through the mounting ring 19, and the indicator needle 18 can correspond one-to-one with the scale line 17 on the transparent scale plate 16. The pressure of the diaphragm 15 between the upper membrane cavity and the lower membrane cavity can be judged according to the indicator needle 18, thereby judging the amount of steam introduced into the steam heater;

[0031] In combination with the first embodiment, during the process of adjusting the amount of steam inside the steam heater, the amount of steam inside the steam heater can be clearly displayed in real time through the steam inlet control structure.

[0032] In combination with Example 1 and Example 2, the steam inlet control structure can be used to adjust the steam flow rate under different pressure conditions formed by steam in different positions in the steam heater, which directly reflects whether the hot steam in the steam heater can meet the heating conditions, thereby providing guidance on whether the saturated steam waste heat generated by the steam heater provides the normal operation of the molecular sieve system. In addition, a pointer compatible with the steam inlet control structure can be used to display the amount of steam introduced in real time during the steam quantity adjustment process, thereby facilitating the smooth operation of the molecular sieve system.

[0033] The above contents are merely examples and explanations of the structure of the present invention. The technicians in this technical field may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the structure of the invention or exceed the scope defined by the claims, they should all fall within the protection scope of the present invention.

Claims

1. A steam inlet control structure for a steam heater, comprising a branch pipe section (2) arranged in the middle of a valve seat (1), characterized in that: A valve hole (20) is provided in the middle of the valve seat (1); the upper end of the branch pipe section (2) is connected with the regulating section (3) and the pressure regulating pipe (4) in sequence; a guide shaft (11) is installed inside the branch pipe section (2) and the regulating section (3); the guide shaft (11) extends to the branch pipe section (2) and the valve seat (1) and a valve stem (9) is installed inside; the bottom end of the valve stem (9) is connected with a valve core (10) matching the valve hole (20); a diaphragm (15) connected with the guide shaft (11) is installed in the middle of the pressure regulating pipe (4) in a transverse manner; a first section air intake pipe (5) is passed through one side of the lower end of the corresponding diaphragm (15) of the pressure regulating pipe (4); and a tail section air intake pipe (6) away from the steam inlet end of the steam heater is connected to the middle of the upper end of the pressure regulating pipe (4).

2. A steam inlet control structure for a steam heater according to claim 1, characterized in that: The middle part of the diaphragm (15) is arranged as an arc-shaped ring structure facing upwards, the pressure regulating tube (4) is divided into an upper diaphragm cavity and a lower diaphragm cavity by the diaphragm (15), the tail section air intake pipe (6) is connected to the upper diaphragm cavity, and the head section air intake pipe (5) is connected to the lower diaphragm cavity.

3. A steam inlet control structure for a steam heater according to claim 2, characterized in that: A connecting plate (13) is installed at the middle position of the bottom of the diaphragm (15), and a pressure plate (14) aligned with the tail section air intake pipe (6) is installed at the top of the diaphragm (15) corresponding to the connecting plate (13).

4. The steam inlet control structure for a steam heater according to claim 1, characterized in that: A spring (12) is installed outside the guide shaft (11), the upper end of the spring (12) is connected to the connecting plate (13), and the lower end of the spring (12) is connected to the inner bottom end of the connecting section (8).

5. The steam inlet regulating structure for a steam heater according to claim 1, characterized in that: The valve stem (9) extends to the outside of the adjustment section (3) and is sleeved with a mounting ring (19). An indicator needle (18) is laterally connected to the outside of the mounting ring (19). A scale plate (16) is embedded in the portion of the adjustment section (3) corresponding to the indicator needle (18). A scale line (17) aligned with the indicator needle (18) is provided on the scale plate (16).

6. The steam inlet control structure for a steam heater according to claim 1, characterized in that: A sealing plate (7) which is sleeved with the tail section air intake pipe (6) is installed at the middle of the upper end of the pressure regulating pipe (4); the sealing plate (7) is an elastic structure and is clamped with the pressure regulating pipe (4).

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